/* Target-struct-independent code to start (run) and stop an inferior process.
|
/* Target-struct-independent code to start (run) and stop an inferior process.
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Copyright 1986-1989, 1991-2000 Free Software Foundation, Inc.
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Copyright 1986-1989, 1991-2000 Free Software Foundation, Inc.
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|
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This file is part of GDB.
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This file is part of GDB.
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|
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This program is free software; you can redistribute it and/or modify
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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(at your option) any later version.
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|
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This program is distributed in the hope that it will be useful,
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
|
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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GNU General Public License for more details.
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|
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You should have received a copy of the GNU General Public License
|
You should have received a copy of the GNU General Public License
|
along with this program; if not, write to the Free Software
|
along with this program; if not, write to the Free Software
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Foundation, Inc., 59 Temple Place - Suite 330,
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Foundation, Inc., 59 Temple Place - Suite 330,
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Boston, MA 02111-1307, USA. */
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Boston, MA 02111-1307, USA. */
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|
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#include "defs.h"
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#include "defs.h"
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#include "gdb_string.h"
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#include "gdb_string.h"
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#include <ctype.h>
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#include <ctype.h>
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#include "symtab.h"
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#include "symtab.h"
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#include "frame.h"
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#include "frame.h"
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#include "inferior.h"
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#include "inferior.h"
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#include "breakpoint.h"
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#include "breakpoint.h"
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#include "gdb_wait.h"
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#include "gdb_wait.h"
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#include "gdbcore.h"
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#include "gdbcore.h"
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#include "gdbcmd.h"
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#include "gdbcmd.h"
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#include "target.h"
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#include "target.h"
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#include "gdbthread.h"
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#include "gdbthread.h"
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#include "annotate.h"
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#include "annotate.h"
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#include "symfile.h" /* for overlay functions */
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#include "symfile.h" /* for overlay functions */
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#include "top.h"
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#include "top.h"
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#include <signal.h>
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#include <signal.h>
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#include "inf-loop.h"
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#include "inf-loop.h"
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|
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/* Prototypes for local functions */
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/* Prototypes for local functions */
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static void signals_info (char *, int);
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static void signals_info (char *, int);
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static void handle_command (char *, int);
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static void handle_command (char *, int);
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static void sig_print_info (enum target_signal);
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static void sig_print_info (enum target_signal);
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|
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static void sig_print_header (void);
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static void sig_print_header (void);
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|
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static void resume_cleanups (int);
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static void resume_cleanups (int);
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|
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static int hook_stop_stub (void *);
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static int hook_stop_stub (void *);
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|
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static void delete_breakpoint_current_contents (void *);
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static void delete_breakpoint_current_contents (void *);
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|
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static void set_follow_fork_mode_command (char *arg, int from_tty,
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static void set_follow_fork_mode_command (char *arg, int from_tty,
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struct cmd_list_element * c);
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struct cmd_list_element * c);
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static struct inferior_status *xmalloc_inferior_status (void);
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static struct inferior_status *xmalloc_inferior_status (void);
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static void free_inferior_status (struct inferior_status *);
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static void free_inferior_status (struct inferior_status *);
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static int restore_selected_frame (void *);
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static int restore_selected_frame (void *);
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static void build_infrun (void);
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static void build_infrun (void);
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static void follow_inferior_fork (int parent_pid, int child_pid,
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static void follow_inferior_fork (int parent_pid, int child_pid,
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int has_forked, int has_vforked);
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int has_forked, int has_vforked);
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static void follow_fork (int parent_pid, int child_pid);
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static void follow_fork (int parent_pid, int child_pid);
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static void follow_vfork (int parent_pid, int child_pid);
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static void follow_vfork (int parent_pid, int child_pid);
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static void set_schedlock_func (char *args, int from_tty,
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static void set_schedlock_func (char *args, int from_tty,
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struct cmd_list_element * c);
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struct cmd_list_element * c);
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struct execution_control_state;
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struct execution_control_state;
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static int currently_stepping (struct execution_control_state *ecs);
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static int currently_stepping (struct execution_control_state *ecs);
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static void xdb_handle_command (char *args, int from_tty);
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static void xdb_handle_command (char *args, int from_tty);
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|
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void _initialize_infrun (void);
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void _initialize_infrun (void);
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int inferior_ignoring_startup_exec_events = 0;
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int inferior_ignoring_startup_exec_events = 0;
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int inferior_ignoring_leading_exec_events = 0;
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int inferior_ignoring_leading_exec_events = 0;
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|
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/* In asynchronous mode, but simulating synchronous execution. */
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/* In asynchronous mode, but simulating synchronous execution. */
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int sync_execution = 0;
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int sync_execution = 0;
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/* wait_for_inferior and normal_stop use this to notify the user
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/* wait_for_inferior and normal_stop use this to notify the user
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when the inferior stopped in a different thread than it had been
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when the inferior stopped in a different thread than it had been
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running in. */
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running in. */
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static int previous_inferior_pid;
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static int previous_inferior_pid;
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/* This is true for configurations that may follow through execl() and
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/* This is true for configurations that may follow through execl() and
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similar functions. At present this is only true for HP-UX native. */
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similar functions. At present this is only true for HP-UX native. */
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#ifndef MAY_FOLLOW_EXEC
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#ifndef MAY_FOLLOW_EXEC
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#define MAY_FOLLOW_EXEC (0)
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#define MAY_FOLLOW_EXEC (0)
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#endif
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#endif
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static int may_follow_exec = MAY_FOLLOW_EXEC;
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static int may_follow_exec = MAY_FOLLOW_EXEC;
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/* resume and wait_for_inferior use this to ensure that when
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/* resume and wait_for_inferior use this to ensure that when
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stepping over a hit breakpoint in a threaded application
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stepping over a hit breakpoint in a threaded application
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only the thread that hit the breakpoint is stepped and the
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only the thread that hit the breakpoint is stepped and the
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other threads don't continue. This prevents having another
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other threads don't continue. This prevents having another
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thread run past the breakpoint while it is temporarily
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thread run past the breakpoint while it is temporarily
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removed.
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removed.
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This is not thread-specific, so it isn't saved as part of
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This is not thread-specific, so it isn't saved as part of
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the infrun state.
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the infrun state.
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Versions of gdb which don't use the "step == this thread steps
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Versions of gdb which don't use the "step == this thread steps
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and others continue" model but instead use the "step == this
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and others continue" model but instead use the "step == this
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thread steps and others wait" shouldn't do this. */
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thread steps and others wait" shouldn't do this. */
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static int thread_step_needed = 0;
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static int thread_step_needed = 0;
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/* This is true if thread_step_needed should actually be used. At
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/* This is true if thread_step_needed should actually be used. At
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present this is only true for HP-UX native. */
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present this is only true for HP-UX native. */
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#ifndef USE_THREAD_STEP_NEEDED
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#ifndef USE_THREAD_STEP_NEEDED
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#define USE_THREAD_STEP_NEEDED (0)
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#define USE_THREAD_STEP_NEEDED (0)
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#endif
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#endif
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static int use_thread_step_needed = USE_THREAD_STEP_NEEDED;
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static int use_thread_step_needed = USE_THREAD_STEP_NEEDED;
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|
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/* GET_LONGJMP_TARGET returns the PC at which longjmp() will resume the
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/* GET_LONGJMP_TARGET returns the PC at which longjmp() will resume the
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program. It needs to examine the jmp_buf argument and extract the PC
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program. It needs to examine the jmp_buf argument and extract the PC
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from it. The return value is non-zero on success, zero otherwise. */
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from it. The return value is non-zero on success, zero otherwise. */
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#ifndef GET_LONGJMP_TARGET
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#ifndef GET_LONGJMP_TARGET
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#define GET_LONGJMP_TARGET(PC_ADDR) 0
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#define GET_LONGJMP_TARGET(PC_ADDR) 0
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#endif
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#endif
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/* Some machines have trampoline code that sits between function callers
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/* Some machines have trampoline code that sits between function callers
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and the actual functions themselves. If this machine doesn't have
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and the actual functions themselves. If this machine doesn't have
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such things, disable their processing. */
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such things, disable their processing. */
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#ifndef SKIP_TRAMPOLINE_CODE
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#ifndef SKIP_TRAMPOLINE_CODE
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#define SKIP_TRAMPOLINE_CODE(pc) 0
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#define SKIP_TRAMPOLINE_CODE(pc) 0
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#endif
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#endif
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|
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/* Dynamic function trampolines are similar to solib trampolines in that they
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/* Dynamic function trampolines are similar to solib trampolines in that they
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are between the caller and the callee. The difference is that when you
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are between the caller and the callee. The difference is that when you
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enter a dynamic trampoline, you can't determine the callee's address. Some
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enter a dynamic trampoline, you can't determine the callee's address. Some
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(usually complex) code needs to run in the dynamic trampoline to figure out
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(usually complex) code needs to run in the dynamic trampoline to figure out
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the callee's address. This macro is usually called twice. First, when we
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the callee's address. This macro is usually called twice. First, when we
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enter the trampoline (looks like a normal function call at that point). It
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enter the trampoline (looks like a normal function call at that point). It
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should return the PC of a point within the trampoline where the callee's
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should return the PC of a point within the trampoline where the callee's
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address is known. Second, when we hit the breakpoint, this routine returns
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address is known. Second, when we hit the breakpoint, this routine returns
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the callee's address. At that point, things proceed as per a step resume
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the callee's address. At that point, things proceed as per a step resume
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breakpoint. */
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breakpoint. */
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#ifndef DYNAMIC_TRAMPOLINE_NEXTPC
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#ifndef DYNAMIC_TRAMPOLINE_NEXTPC
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#define DYNAMIC_TRAMPOLINE_NEXTPC(pc) 0
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#define DYNAMIC_TRAMPOLINE_NEXTPC(pc) 0
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#endif
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#endif
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/* If the program uses ELF-style shared libraries, then calls to
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/* If the program uses ELF-style shared libraries, then calls to
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functions in shared libraries go through stubs, which live in a
|
functions in shared libraries go through stubs, which live in a
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table called the PLT (Procedure Linkage Table). The first time the
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table called the PLT (Procedure Linkage Table). The first time the
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function is called, the stub sends control to the dynamic linker,
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function is called, the stub sends control to the dynamic linker,
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which looks up the function's real address, patches the stub so
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which looks up the function's real address, patches the stub so
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that future calls will go directly to the function, and then passes
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that future calls will go directly to the function, and then passes
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control to the function.
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control to the function.
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|
|
If we are stepping at the source level, we don't want to see any of
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If we are stepping at the source level, we don't want to see any of
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this --- we just want to skip over the stub and the dynamic linker.
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this --- we just want to skip over the stub and the dynamic linker.
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The simple approach is to single-step until control leaves the
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The simple approach is to single-step until control leaves the
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dynamic linker.
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dynamic linker.
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However, on some systems (e.g., Red Hat Linux 5.2) the dynamic
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However, on some systems (e.g., Red Hat Linux 5.2) the dynamic
|
linker calls functions in the shared C library, so you can't tell
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linker calls functions in the shared C library, so you can't tell
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from the PC alone whether the dynamic linker is still running. In
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from the PC alone whether the dynamic linker is still running. In
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this case, we use a step-resume breakpoint to get us past the
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this case, we use a step-resume breakpoint to get us past the
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dynamic linker, as if we were using "next" to step over a function
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dynamic linker, as if we were using "next" to step over a function
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call.
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call.
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IN_SOLIB_DYNSYM_RESOLVE_CODE says whether we're in the dynamic
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IN_SOLIB_DYNSYM_RESOLVE_CODE says whether we're in the dynamic
|
linker code or not. Normally, this means we single-step. However,
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linker code or not. Normally, this means we single-step. However,
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if SKIP_SOLIB_RESOLVER then returns non-zero, then its value is an
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if SKIP_SOLIB_RESOLVER then returns non-zero, then its value is an
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address where we can place a step-resume breakpoint to get past the
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address where we can place a step-resume breakpoint to get past the
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linker's symbol resolution function.
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linker's symbol resolution function.
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|
IN_SOLIB_DYNSYM_RESOLVE_CODE can generally be implemented in a
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IN_SOLIB_DYNSYM_RESOLVE_CODE can generally be implemented in a
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pretty portable way, by comparing the PC against the address ranges
|
pretty portable way, by comparing the PC against the address ranges
|
of the dynamic linker's sections.
|
of the dynamic linker's sections.
|
|
|
SKIP_SOLIB_RESOLVER is generally going to be system-specific, since
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SKIP_SOLIB_RESOLVER is generally going to be system-specific, since
|
it depends on internal details of the dynamic linker. It's usually
|
it depends on internal details of the dynamic linker. It's usually
|
not too hard to figure out where to put a breakpoint, but it
|
not too hard to figure out where to put a breakpoint, but it
|
certainly isn't portable. SKIP_SOLIB_RESOLVER should do plenty of
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certainly isn't portable. SKIP_SOLIB_RESOLVER should do plenty of
|
sanity checking. If it can't figure things out, returning zero and
|
sanity checking. If it can't figure things out, returning zero and
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getting the (possibly confusing) stepping behavior is better than
|
getting the (possibly confusing) stepping behavior is better than
|
signalling an error, which will obscure the change in the
|
signalling an error, which will obscure the change in the
|
inferior's state. */
|
inferior's state. */
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|
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#ifndef IN_SOLIB_DYNSYM_RESOLVE_CODE
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#ifndef IN_SOLIB_DYNSYM_RESOLVE_CODE
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#define IN_SOLIB_DYNSYM_RESOLVE_CODE(pc) 0
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#define IN_SOLIB_DYNSYM_RESOLVE_CODE(pc) 0
|
#endif
|
#endif
|
|
|
#ifndef SKIP_SOLIB_RESOLVER
|
#ifndef SKIP_SOLIB_RESOLVER
|
#define SKIP_SOLIB_RESOLVER(pc) 0
|
#define SKIP_SOLIB_RESOLVER(pc) 0
|
#endif
|
#endif
|
|
|
/* For SVR4 shared libraries, each call goes through a small piece of
|
/* For SVR4 shared libraries, each call goes through a small piece of
|
trampoline code in the ".plt" section. IN_SOLIB_CALL_TRAMPOLINE evaluates
|
trampoline code in the ".plt" section. IN_SOLIB_CALL_TRAMPOLINE evaluates
|
to nonzero if we are current stopped in one of these. */
|
to nonzero if we are current stopped in one of these. */
|
|
|
#ifndef IN_SOLIB_CALL_TRAMPOLINE
|
#ifndef IN_SOLIB_CALL_TRAMPOLINE
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#define IN_SOLIB_CALL_TRAMPOLINE(pc,name) 0
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#define IN_SOLIB_CALL_TRAMPOLINE(pc,name) 0
|
#endif
|
#endif
|
|
|
/* In some shared library schemes, the return path from a shared library
|
/* In some shared library schemes, the return path from a shared library
|
call may need to go through a trampoline too. */
|
call may need to go through a trampoline too. */
|
|
|
#ifndef IN_SOLIB_RETURN_TRAMPOLINE
|
#ifndef IN_SOLIB_RETURN_TRAMPOLINE
|
#define IN_SOLIB_RETURN_TRAMPOLINE(pc,name) 0
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#define IN_SOLIB_RETURN_TRAMPOLINE(pc,name) 0
|
#endif
|
#endif
|
|
|
/* This function returns TRUE if pc is the address of an instruction
|
/* This function returns TRUE if pc is the address of an instruction
|
that lies within the dynamic linker (such as the event hook, or the
|
that lies within the dynamic linker (such as the event hook, or the
|
dld itself).
|
dld itself).
|
|
|
This function must be used only when a dynamic linker event has
|
This function must be used only when a dynamic linker event has
|
been caught, and the inferior is being stepped out of the hook, or
|
been caught, and the inferior is being stepped out of the hook, or
|
undefined results are guaranteed. */
|
undefined results are guaranteed. */
|
|
|
#ifndef SOLIB_IN_DYNAMIC_LINKER
|
#ifndef SOLIB_IN_DYNAMIC_LINKER
|
#define SOLIB_IN_DYNAMIC_LINKER(pid,pc) 0
|
#define SOLIB_IN_DYNAMIC_LINKER(pid,pc) 0
|
#endif
|
#endif
|
|
|
/* On MIPS16, a function that returns a floating point value may call
|
/* On MIPS16, a function that returns a floating point value may call
|
a library helper function to copy the return value to a floating point
|
a library helper function to copy the return value to a floating point
|
register. The IGNORE_HELPER_CALL macro returns non-zero if we
|
register. The IGNORE_HELPER_CALL macro returns non-zero if we
|
should ignore (i.e. step over) this function call. */
|
should ignore (i.e. step over) this function call. */
|
#ifndef IGNORE_HELPER_CALL
|
#ifndef IGNORE_HELPER_CALL
|
#define IGNORE_HELPER_CALL(pc) 0
|
#define IGNORE_HELPER_CALL(pc) 0
|
#endif
|
#endif
|
|
|
/* On some systems, the PC may be left pointing at an instruction that won't
|
/* On some systems, the PC may be left pointing at an instruction that won't
|
actually be executed. This is usually indicated by a bit in the PSW. If
|
actually be executed. This is usually indicated by a bit in the PSW. If
|
we find ourselves in such a state, then we step the target beyond the
|
we find ourselves in such a state, then we step the target beyond the
|
nullified instruction before returning control to the user so as to avoid
|
nullified instruction before returning control to the user so as to avoid
|
confusion. */
|
confusion. */
|
|
|
#ifndef INSTRUCTION_NULLIFIED
|
#ifndef INSTRUCTION_NULLIFIED
|
#define INSTRUCTION_NULLIFIED 0
|
#define INSTRUCTION_NULLIFIED 0
|
#endif
|
#endif
|
|
|
/* We can't step off a permanent breakpoint in the ordinary way, because we
|
/* We can't step off a permanent breakpoint in the ordinary way, because we
|
can't remove it. Instead, we have to advance the PC to the next
|
can't remove it. Instead, we have to advance the PC to the next
|
instruction. This macro should expand to a pointer to a function that
|
instruction. This macro should expand to a pointer to a function that
|
does that, or zero if we have no such function. If we don't have a
|
does that, or zero if we have no such function. If we don't have a
|
definition for it, we have to report an error. */
|
definition for it, we have to report an error. */
|
#ifndef SKIP_PERMANENT_BREAKPOINT
|
#ifndef SKIP_PERMANENT_BREAKPOINT
|
#define SKIP_PERMANENT_BREAKPOINT (default_skip_permanent_breakpoint)
|
#define SKIP_PERMANENT_BREAKPOINT (default_skip_permanent_breakpoint)
|
static void
|
static void
|
default_skip_permanent_breakpoint (void)
|
default_skip_permanent_breakpoint (void)
|
{
|
{
|
error_begin ();
|
error_begin ();
|
fprintf_filtered (gdb_stderr, "\
|
fprintf_filtered (gdb_stderr, "\
|
The program is stopped at a permanent breakpoint, but GDB does not know\n\
|
The program is stopped at a permanent breakpoint, but GDB does not know\n\
|
how to step past a permanent breakpoint on this architecture. Try using\n\
|
how to step past a permanent breakpoint on this architecture. Try using\n\
|
a command like `return' or `jump' to continue execution.\n");
|
a command like `return' or `jump' to continue execution.\n");
|
return_to_top_level (RETURN_ERROR);
|
return_to_top_level (RETURN_ERROR);
|
}
|
}
|
#endif
|
#endif
|
|
|
|
|
/* Convert the #defines into values. This is temporary until wfi control
|
/* Convert the #defines into values. This is temporary until wfi control
|
flow is completely sorted out. */
|
flow is completely sorted out. */
|
|
|
#ifndef HAVE_STEPPABLE_WATCHPOINT
|
#ifndef HAVE_STEPPABLE_WATCHPOINT
|
#define HAVE_STEPPABLE_WATCHPOINT 0
|
#define HAVE_STEPPABLE_WATCHPOINT 0
|
#else
|
#else
|
#undef HAVE_STEPPABLE_WATCHPOINT
|
#undef HAVE_STEPPABLE_WATCHPOINT
|
#define HAVE_STEPPABLE_WATCHPOINT 1
|
#define HAVE_STEPPABLE_WATCHPOINT 1
|
#endif
|
#endif
|
|
|
#ifndef HAVE_NONSTEPPABLE_WATCHPOINT
|
#ifndef HAVE_NONSTEPPABLE_WATCHPOINT
|
#define HAVE_NONSTEPPABLE_WATCHPOINT 0
|
#define HAVE_NONSTEPPABLE_WATCHPOINT 0
|
#else
|
#else
|
#undef HAVE_NONSTEPPABLE_WATCHPOINT
|
#undef HAVE_NONSTEPPABLE_WATCHPOINT
|
#define HAVE_NONSTEPPABLE_WATCHPOINT 1
|
#define HAVE_NONSTEPPABLE_WATCHPOINT 1
|
#endif
|
#endif
|
|
|
#ifndef HAVE_CONTINUABLE_WATCHPOINT
|
#ifndef HAVE_CONTINUABLE_WATCHPOINT
|
#define HAVE_CONTINUABLE_WATCHPOINT 0
|
#define HAVE_CONTINUABLE_WATCHPOINT 0
|
#else
|
#else
|
#undef HAVE_CONTINUABLE_WATCHPOINT
|
#undef HAVE_CONTINUABLE_WATCHPOINT
|
#define HAVE_CONTINUABLE_WATCHPOINT 1
|
#define HAVE_CONTINUABLE_WATCHPOINT 1
|
#endif
|
#endif
|
|
|
#ifndef CANNOT_STEP_HW_WATCHPOINTS
|
#ifndef CANNOT_STEP_HW_WATCHPOINTS
|
#define CANNOT_STEP_HW_WATCHPOINTS 0
|
#define CANNOT_STEP_HW_WATCHPOINTS 0
|
#else
|
#else
|
#undef CANNOT_STEP_HW_WATCHPOINTS
|
#undef CANNOT_STEP_HW_WATCHPOINTS
|
#define CANNOT_STEP_HW_WATCHPOINTS 1
|
#define CANNOT_STEP_HW_WATCHPOINTS 1
|
#endif
|
#endif
|
|
|
/* Tables of how to react to signals; the user sets them. */
|
/* Tables of how to react to signals; the user sets them. */
|
|
|
static unsigned char *signal_stop;
|
static unsigned char *signal_stop;
|
static unsigned char *signal_print;
|
static unsigned char *signal_print;
|
static unsigned char *signal_program;
|
static unsigned char *signal_program;
|
|
|
#define SET_SIGS(nsigs,sigs,flags) \
|
#define SET_SIGS(nsigs,sigs,flags) \
|
do { \
|
do { \
|
int signum = (nsigs); \
|
int signum = (nsigs); \
|
while (signum-- > 0) \
|
while (signum-- > 0) \
|
if ((sigs)[signum]) \
|
if ((sigs)[signum]) \
|
(flags)[signum] = 1; \
|
(flags)[signum] = 1; \
|
} while (0)
|
} while (0)
|
|
|
#define UNSET_SIGS(nsigs,sigs,flags) \
|
#define UNSET_SIGS(nsigs,sigs,flags) \
|
do { \
|
do { \
|
int signum = (nsigs); \
|
int signum = (nsigs); \
|
while (signum-- > 0) \
|
while (signum-- > 0) \
|
if ((sigs)[signum]) \
|
if ((sigs)[signum]) \
|
(flags)[signum] = 0; \
|
(flags)[signum] = 0; \
|
} while (0)
|
} while (0)
|
|
|
|
|
/* Command list pointer for the "stop" placeholder. */
|
/* Command list pointer for the "stop" placeholder. */
|
|
|
static struct cmd_list_element *stop_command;
|
static struct cmd_list_element *stop_command;
|
|
|
/* Nonzero if breakpoints are now inserted in the inferior. */
|
/* Nonzero if breakpoints are now inserted in the inferior. */
|
|
|
static int breakpoints_inserted;
|
static int breakpoints_inserted;
|
|
|
/* Function inferior was in as of last step command. */
|
/* Function inferior was in as of last step command. */
|
|
|
static struct symbol *step_start_function;
|
static struct symbol *step_start_function;
|
|
|
/* Nonzero if we are expecting a trace trap and should proceed from it. */
|
/* Nonzero if we are expecting a trace trap and should proceed from it. */
|
|
|
static int trap_expected;
|
static int trap_expected;
|
|
|
#ifdef SOLIB_ADD
|
#ifdef SOLIB_ADD
|
/* Nonzero if we want to give control to the user when we're notified
|
/* Nonzero if we want to give control to the user when we're notified
|
of shared library events by the dynamic linker. */
|
of shared library events by the dynamic linker. */
|
static int stop_on_solib_events;
|
static int stop_on_solib_events;
|
#endif
|
#endif
|
|
|
#ifdef HP_OS_BUG
|
#ifdef HP_OS_BUG
|
/* Nonzero if the next time we try to continue the inferior, it will
|
/* Nonzero if the next time we try to continue the inferior, it will
|
step one instruction and generate a spurious trace trap.
|
step one instruction and generate a spurious trace trap.
|
This is used to compensate for a bug in HP-UX. */
|
This is used to compensate for a bug in HP-UX. */
|
|
|
static int trap_expected_after_continue;
|
static int trap_expected_after_continue;
|
#endif
|
#endif
|
|
|
/* Nonzero means expecting a trace trap
|
/* Nonzero means expecting a trace trap
|
and should stop the inferior and return silently when it happens. */
|
and should stop the inferior and return silently when it happens. */
|
|
|
int stop_after_trap;
|
int stop_after_trap;
|
|
|
/* Nonzero means expecting a trap and caller will handle it themselves.
|
/* Nonzero means expecting a trap and caller will handle it themselves.
|
It is used after attach, due to attaching to a process;
|
It is used after attach, due to attaching to a process;
|
when running in the shell before the child program has been exec'd;
|
when running in the shell before the child program has been exec'd;
|
and when running some kinds of remote stuff (FIXME?). */
|
and when running some kinds of remote stuff (FIXME?). */
|
|
|
int stop_soon_quietly;
|
int stop_soon_quietly;
|
|
|
/* Nonzero if proceed is being used for a "finish" command or a similar
|
/* Nonzero if proceed is being used for a "finish" command or a similar
|
situation when stop_registers should be saved. */
|
situation when stop_registers should be saved. */
|
|
|
int proceed_to_finish;
|
int proceed_to_finish;
|
|
|
/* Save register contents here when about to pop a stack dummy frame,
|
/* Save register contents here when about to pop a stack dummy frame,
|
if-and-only-if proceed_to_finish is set.
|
if-and-only-if proceed_to_finish is set.
|
Thus this contains the return value from the called function (assuming
|
Thus this contains the return value from the called function (assuming
|
values are returned in a register). */
|
values are returned in a register). */
|
|
|
char *stop_registers;
|
char *stop_registers;
|
|
|
/* Nonzero if program stopped due to error trying to insert breakpoints. */
|
/* Nonzero if program stopped due to error trying to insert breakpoints. */
|
|
|
static int breakpoints_failed;
|
static int breakpoints_failed;
|
|
|
/* Nonzero after stop if current stack frame should be printed. */
|
/* Nonzero after stop if current stack frame should be printed. */
|
|
|
static int stop_print_frame;
|
static int stop_print_frame;
|
|
|
static struct breakpoint *step_resume_breakpoint = NULL;
|
static struct breakpoint *step_resume_breakpoint = NULL;
|
static struct breakpoint *through_sigtramp_breakpoint = NULL;
|
static struct breakpoint *through_sigtramp_breakpoint = NULL;
|
|
|
/* On some platforms (e.g., HP-UX), hardware watchpoints have bad
|
/* On some platforms (e.g., HP-UX), hardware watchpoints have bad
|
interactions with an inferior that is running a kernel function
|
interactions with an inferior that is running a kernel function
|
(aka, a system call or "syscall"). wait_for_inferior therefore
|
(aka, a system call or "syscall"). wait_for_inferior therefore
|
may have a need to know when the inferior is in a syscall. This
|
may have a need to know when the inferior is in a syscall. This
|
is a count of the number of inferior threads which are known to
|
is a count of the number of inferior threads which are known to
|
currently be running in a syscall. */
|
currently be running in a syscall. */
|
static int number_of_threads_in_syscalls;
|
static int number_of_threads_in_syscalls;
|
|
|
/* This is used to remember when a fork, vfork or exec event
|
/* This is used to remember when a fork, vfork or exec event
|
was caught by a catchpoint, and thus the event is to be
|
was caught by a catchpoint, and thus the event is to be
|
followed at the next resume of the inferior, and not
|
followed at the next resume of the inferior, and not
|
immediately. */
|
immediately. */
|
static struct
|
static struct
|
{
|
{
|
enum target_waitkind kind;
|
enum target_waitkind kind;
|
struct
|
struct
|
{
|
{
|
int parent_pid;
|
int parent_pid;
|
int saw_parent_fork;
|
int saw_parent_fork;
|
int child_pid;
|
int child_pid;
|
int saw_child_fork;
|
int saw_child_fork;
|
int saw_child_exec;
|
int saw_child_exec;
|
}
|
}
|
fork_event;
|
fork_event;
|
char *execd_pathname;
|
char *execd_pathname;
|
}
|
}
|
pending_follow;
|
pending_follow;
|
|
|
/* Some platforms don't allow us to do anything meaningful with a
|
/* Some platforms don't allow us to do anything meaningful with a
|
vforked child until it has exec'd. Vforked processes on such
|
vforked child until it has exec'd. Vforked processes on such
|
platforms can only be followed after they've exec'd.
|
platforms can only be followed after they've exec'd.
|
|
|
When this is set to 0, a vfork can be immediately followed,
|
When this is set to 0, a vfork can be immediately followed,
|
and an exec can be followed merely as an exec. When this is
|
and an exec can be followed merely as an exec. When this is
|
set to 1, a vfork event has been seen, but cannot be followed
|
set to 1, a vfork event has been seen, but cannot be followed
|
until the exec is seen.
|
until the exec is seen.
|
|
|
(In the latter case, inferior_pid is still the parent of the
|
(In the latter case, inferior_pid is still the parent of the
|
vfork, and pending_follow.fork_event.child_pid is the child. The
|
vfork, and pending_follow.fork_event.child_pid is the child. The
|
appropriate process is followed, according to the setting of
|
appropriate process is followed, according to the setting of
|
follow-fork-mode.) */
|
follow-fork-mode.) */
|
static int follow_vfork_when_exec;
|
static int follow_vfork_when_exec;
|
|
|
static char *follow_fork_mode_kind_names[] =
|
static char *follow_fork_mode_kind_names[] =
|
{
|
{
|
/* ??rehrauer: The "both" option is broken, by what may be a 10.20
|
/* ??rehrauer: The "both" option is broken, by what may be a 10.20
|
kernel problem. It's also not terribly useful without a GUI to
|
kernel problem. It's also not terribly useful without a GUI to
|
help the user drive two debuggers. So for now, I'm disabling the
|
help the user drive two debuggers. So for now, I'm disabling the
|
"both" option. */
|
"both" option. */
|
/* "parent", "child", "both", "ask" */
|
/* "parent", "child", "both", "ask" */
|
"parent", "child", "ask", NULL
|
"parent", "child", "ask", NULL
|
};
|
};
|
|
|
static char *follow_fork_mode_string = NULL;
|
static char *follow_fork_mode_string = NULL;
|
|
|
|
|
static void
|
static void
|
follow_inferior_fork (int parent_pid, int child_pid, int has_forked,
|
follow_inferior_fork (int parent_pid, int child_pid, int has_forked,
|
int has_vforked)
|
int has_vforked)
|
{
|
{
|
int followed_parent = 0;
|
int followed_parent = 0;
|
int followed_child = 0;
|
int followed_child = 0;
|
|
|
/* Which process did the user want us to follow? */
|
/* Which process did the user want us to follow? */
|
char *follow_mode =
|
char *follow_mode =
|
savestring (follow_fork_mode_string, strlen (follow_fork_mode_string));
|
savestring (follow_fork_mode_string, strlen (follow_fork_mode_string));
|
|
|
/* Or, did the user not know, and want us to ask? */
|
/* Or, did the user not know, and want us to ask? */
|
if (STREQ (follow_fork_mode_string, "ask"))
|
if (STREQ (follow_fork_mode_string, "ask"))
|
{
|
{
|
char requested_mode[100];
|
char requested_mode[100];
|
|
|
free (follow_mode);
|
free (follow_mode);
|
error ("\"ask\" mode NYI");
|
error ("\"ask\" mode NYI");
|
follow_mode = savestring (requested_mode, strlen (requested_mode));
|
follow_mode = savestring (requested_mode, strlen (requested_mode));
|
}
|
}
|
|
|
/* If we're to be following the parent, then detach from child_pid.
|
/* If we're to be following the parent, then detach from child_pid.
|
We're already following the parent, so need do nothing explicit
|
We're already following the parent, so need do nothing explicit
|
for it. */
|
for it. */
|
if (STREQ (follow_mode, "parent"))
|
if (STREQ (follow_mode, "parent"))
|
{
|
{
|
followed_parent = 1;
|
followed_parent = 1;
|
|
|
/* We're already attached to the parent, by default. */
|
/* We're already attached to the parent, by default. */
|
|
|
/* Before detaching from the child, remove all breakpoints from
|
/* Before detaching from the child, remove all breakpoints from
|
it. (This won't actually modify the breakpoint list, but will
|
it. (This won't actually modify the breakpoint list, but will
|
physically remove the breakpoints from the child.) */
|
physically remove the breakpoints from the child.) */
|
if (!has_vforked || !follow_vfork_when_exec)
|
if (!has_vforked || !follow_vfork_when_exec)
|
{
|
{
|
detach_breakpoints (child_pid);
|
detach_breakpoints (child_pid);
|
#ifdef SOLIB_REMOVE_INFERIOR_HOOK
|
#ifdef SOLIB_REMOVE_INFERIOR_HOOK
|
SOLIB_REMOVE_INFERIOR_HOOK (child_pid);
|
SOLIB_REMOVE_INFERIOR_HOOK (child_pid);
|
#endif
|
#endif
|
}
|
}
|
|
|
/* Detach from the child. */
|
/* Detach from the child. */
|
dont_repeat ();
|
dont_repeat ();
|
|
|
target_require_detach (child_pid, "", 1);
|
target_require_detach (child_pid, "", 1);
|
}
|
}
|
|
|
/* If we're to be following the child, then attach to it, detach
|
/* If we're to be following the child, then attach to it, detach
|
from inferior_pid, and set inferior_pid to child_pid. */
|
from inferior_pid, and set inferior_pid to child_pid. */
|
else if (STREQ (follow_mode, "child"))
|
else if (STREQ (follow_mode, "child"))
|
{
|
{
|
char child_pid_spelling[100]; /* Arbitrary length. */
|
char child_pid_spelling[100]; /* Arbitrary length. */
|
|
|
followed_child = 1;
|
followed_child = 1;
|
|
|
/* Before detaching from the parent, detach all breakpoints from
|
/* Before detaching from the parent, detach all breakpoints from
|
the child. But only if we're forking, or if we follow vforks
|
the child. But only if we're forking, or if we follow vforks
|
as soon as they happen. (If we're following vforks only when
|
as soon as they happen. (If we're following vforks only when
|
the child has exec'd, then it's very wrong to try to write
|
the child has exec'd, then it's very wrong to try to write
|
back the "shadow contents" of inserted breakpoints now -- they
|
back the "shadow contents" of inserted breakpoints now -- they
|
belong to the child's pre-exec'd a.out.) */
|
belong to the child's pre-exec'd a.out.) */
|
if (!has_vforked || !follow_vfork_when_exec)
|
if (!has_vforked || !follow_vfork_when_exec)
|
{
|
{
|
detach_breakpoints (child_pid);
|
detach_breakpoints (child_pid);
|
}
|
}
|
|
|
/* Before detaching from the parent, remove all breakpoints from it. */
|
/* Before detaching from the parent, remove all breakpoints from it. */
|
remove_breakpoints ();
|
remove_breakpoints ();
|
|
|
/* Also reset the solib inferior hook from the parent. */
|
/* Also reset the solib inferior hook from the parent. */
|
#ifdef SOLIB_REMOVE_INFERIOR_HOOK
|
#ifdef SOLIB_REMOVE_INFERIOR_HOOK
|
SOLIB_REMOVE_INFERIOR_HOOK (inferior_pid);
|
SOLIB_REMOVE_INFERIOR_HOOK (inferior_pid);
|
#endif
|
#endif
|
|
|
/* Detach from the parent. */
|
/* Detach from the parent. */
|
dont_repeat ();
|
dont_repeat ();
|
target_detach (NULL, 1);
|
target_detach (NULL, 1);
|
|
|
/* Attach to the child. */
|
/* Attach to the child. */
|
inferior_pid = child_pid;
|
inferior_pid = child_pid;
|
sprintf (child_pid_spelling, "%d", child_pid);
|
sprintf (child_pid_spelling, "%d", child_pid);
|
dont_repeat ();
|
dont_repeat ();
|
|
|
target_require_attach (child_pid_spelling, 1);
|
target_require_attach (child_pid_spelling, 1);
|
|
|
/* Was there a step_resume breakpoint? (There was if the user
|
/* Was there a step_resume breakpoint? (There was if the user
|
did a "next" at the fork() call.) If so, explicitly reset its
|
did a "next" at the fork() call.) If so, explicitly reset its
|
thread number.
|
thread number.
|
|
|
step_resumes are a form of bp that are made to be per-thread.
|
step_resumes are a form of bp that are made to be per-thread.
|
Since we created the step_resume bp when the parent process
|
Since we created the step_resume bp when the parent process
|
was being debugged, and now are switching to the child process,
|
was being debugged, and now are switching to the child process,
|
from the breakpoint package's viewpoint, that's a switch of
|
from the breakpoint package's viewpoint, that's a switch of
|
"threads". We must update the bp's notion of which thread
|
"threads". We must update the bp's notion of which thread
|
it is for, or it'll be ignored when it triggers... */
|
it is for, or it'll be ignored when it triggers... */
|
if (step_resume_breakpoint &&
|
if (step_resume_breakpoint &&
|
(!has_vforked || !follow_vfork_when_exec))
|
(!has_vforked || !follow_vfork_when_exec))
|
breakpoint_re_set_thread (step_resume_breakpoint);
|
breakpoint_re_set_thread (step_resume_breakpoint);
|
|
|
/* Reinsert all breakpoints in the child. (The user may've set
|
/* Reinsert all breakpoints in the child. (The user may've set
|
breakpoints after catching the fork, in which case those
|
breakpoints after catching the fork, in which case those
|
actually didn't get set in the child, but only in the parent.) */
|
actually didn't get set in the child, but only in the parent.) */
|
if (!has_vforked || !follow_vfork_when_exec)
|
if (!has_vforked || !follow_vfork_when_exec)
|
{
|
{
|
breakpoint_re_set ();
|
breakpoint_re_set ();
|
insert_breakpoints ();
|
insert_breakpoints ();
|
}
|
}
|
}
|
}
|
|
|
/* If we're to be following both parent and child, then fork ourselves,
|
/* If we're to be following both parent and child, then fork ourselves,
|
and attach the debugger clone to the child. */
|
and attach the debugger clone to the child. */
|
else if (STREQ (follow_mode, "both"))
|
else if (STREQ (follow_mode, "both"))
|
{
|
{
|
char pid_suffix[100]; /* Arbitrary length. */
|
char pid_suffix[100]; /* Arbitrary length. */
|
|
|
/* Clone ourselves to follow the child. This is the end of our
|
/* Clone ourselves to follow the child. This is the end of our
|
involvement with child_pid; our clone will take it from here... */
|
involvement with child_pid; our clone will take it from here... */
|
dont_repeat ();
|
dont_repeat ();
|
target_clone_and_follow_inferior (child_pid, &followed_child);
|
target_clone_and_follow_inferior (child_pid, &followed_child);
|
followed_parent = !followed_child;
|
followed_parent = !followed_child;
|
|
|
/* We continue to follow the parent. To help distinguish the two
|
/* We continue to follow the parent. To help distinguish the two
|
debuggers, though, both we and our clone will reset our prompts. */
|
debuggers, though, both we and our clone will reset our prompts. */
|
sprintf (pid_suffix, "[%d] ", inferior_pid);
|
sprintf (pid_suffix, "[%d] ", inferior_pid);
|
set_prompt (strcat (get_prompt (), pid_suffix));
|
set_prompt (strcat (get_prompt (), pid_suffix));
|
}
|
}
|
|
|
/* The parent and child of a vfork share the same address space.
|
/* The parent and child of a vfork share the same address space.
|
Also, on some targets the order in which vfork and exec events
|
Also, on some targets the order in which vfork and exec events
|
are received for parent in child requires some delicate handling
|
are received for parent in child requires some delicate handling
|
of the events.
|
of the events.
|
|
|
For instance, on ptrace-based HPUX we receive the child's vfork
|
For instance, on ptrace-based HPUX we receive the child's vfork
|
event first, at which time the parent has been suspended by the
|
event first, at which time the parent has been suspended by the
|
OS and is essentially untouchable until the child's exit or second
|
OS and is essentially untouchable until the child's exit or second
|
exec event arrives. At that time, the parent's vfork event is
|
exec event arrives. At that time, the parent's vfork event is
|
delivered to us, and that's when we see and decide how to follow
|
delivered to us, and that's when we see and decide how to follow
|
the vfork. But to get to that point, we must continue the child
|
the vfork. But to get to that point, we must continue the child
|
until it execs or exits. To do that smoothly, all breakpoints
|
until it execs or exits. To do that smoothly, all breakpoints
|
must be removed from the child, in case there are any set between
|
must be removed from the child, in case there are any set between
|
the vfork() and exec() calls. But removing them from the child
|
the vfork() and exec() calls. But removing them from the child
|
also removes them from the parent, due to the shared-address-space
|
also removes them from the parent, due to the shared-address-space
|
nature of a vfork'd parent and child. On HPUX, therefore, we must
|
nature of a vfork'd parent and child. On HPUX, therefore, we must
|
take care to restore the bp's to the parent before we continue it.
|
take care to restore the bp's to the parent before we continue it.
|
Else, it's likely that we may not stop in the expected place. (The
|
Else, it's likely that we may not stop in the expected place. (The
|
worst scenario is when the user tries to step over a vfork() call;
|
worst scenario is when the user tries to step over a vfork() call;
|
the step-resume bp must be restored for the step to properly stop
|
the step-resume bp must be restored for the step to properly stop
|
in the parent after the call completes!)
|
in the parent after the call completes!)
|
|
|
Sequence of events, as reported to gdb from HPUX:
|
Sequence of events, as reported to gdb from HPUX:
|
|
|
Parent Child Action for gdb to take
|
Parent Child Action for gdb to take
|
-------------------------------------------------------
|
-------------------------------------------------------
|
1 VFORK Continue child
|
1 VFORK Continue child
|
2 EXEC
|
2 EXEC
|
3 EXEC or EXIT
|
3 EXEC or EXIT
|
4 VFORK */
|
4 VFORK */
|
if (has_vforked)
|
if (has_vforked)
|
{
|
{
|
target_post_follow_vfork (parent_pid,
|
target_post_follow_vfork (parent_pid,
|
followed_parent,
|
followed_parent,
|
child_pid,
|
child_pid,
|
followed_child);
|
followed_child);
|
}
|
}
|
|
|
pending_follow.fork_event.saw_parent_fork = 0;
|
pending_follow.fork_event.saw_parent_fork = 0;
|
pending_follow.fork_event.saw_child_fork = 0;
|
pending_follow.fork_event.saw_child_fork = 0;
|
|
|
free (follow_mode);
|
free (follow_mode);
|
}
|
}
|
|
|
static void
|
static void
|
follow_fork (int parent_pid, int child_pid)
|
follow_fork (int parent_pid, int child_pid)
|
{
|
{
|
follow_inferior_fork (parent_pid, child_pid, 1, 0);
|
follow_inferior_fork (parent_pid, child_pid, 1, 0);
|
}
|
}
|
|
|
|
|
/* Forward declaration. */
|
/* Forward declaration. */
|
static void follow_exec (int, char *);
|
static void follow_exec (int, char *);
|
|
|
static void
|
static void
|
follow_vfork (int parent_pid, int child_pid)
|
follow_vfork (int parent_pid, int child_pid)
|
{
|
{
|
follow_inferior_fork (parent_pid, child_pid, 0, 1);
|
follow_inferior_fork (parent_pid, child_pid, 0, 1);
|
|
|
/* Did we follow the child? Had it exec'd before we saw the parent vfork? */
|
/* Did we follow the child? Had it exec'd before we saw the parent vfork? */
|
if (pending_follow.fork_event.saw_child_exec && (inferior_pid == child_pid))
|
if (pending_follow.fork_event.saw_child_exec && (inferior_pid == child_pid))
|
{
|
{
|
pending_follow.fork_event.saw_child_exec = 0;
|
pending_follow.fork_event.saw_child_exec = 0;
|
pending_follow.kind = TARGET_WAITKIND_SPURIOUS;
|
pending_follow.kind = TARGET_WAITKIND_SPURIOUS;
|
follow_exec (inferior_pid, pending_follow.execd_pathname);
|
follow_exec (inferior_pid, pending_follow.execd_pathname);
|
free (pending_follow.execd_pathname);
|
free (pending_follow.execd_pathname);
|
}
|
}
|
}
|
}
|
|
|
static void
|
static void
|
follow_exec (int pid, char *execd_pathname)
|
follow_exec (int pid, char *execd_pathname)
|
{
|
{
|
int saved_pid = pid;
|
int saved_pid = pid;
|
struct target_ops *tgt;
|
struct target_ops *tgt;
|
|
|
if (!may_follow_exec)
|
if (!may_follow_exec)
|
return;
|
return;
|
|
|
/* Did this exec() follow a vfork()? If so, we must follow the
|
/* Did this exec() follow a vfork()? If so, we must follow the
|
vfork now too. Do it before following the exec. */
|
vfork now too. Do it before following the exec. */
|
if (follow_vfork_when_exec &&
|
if (follow_vfork_when_exec &&
|
(pending_follow.kind == TARGET_WAITKIND_VFORKED))
|
(pending_follow.kind == TARGET_WAITKIND_VFORKED))
|
{
|
{
|
pending_follow.kind = TARGET_WAITKIND_SPURIOUS;
|
pending_follow.kind = TARGET_WAITKIND_SPURIOUS;
|
follow_vfork (inferior_pid, pending_follow.fork_event.child_pid);
|
follow_vfork (inferior_pid, pending_follow.fork_event.child_pid);
|
follow_vfork_when_exec = 0;
|
follow_vfork_when_exec = 0;
|
saved_pid = inferior_pid;
|
saved_pid = inferior_pid;
|
|
|
/* Did we follow the parent? If so, we're done. If we followed
|
/* Did we follow the parent? If so, we're done. If we followed
|
the child then we must also follow its exec(). */
|
the child then we must also follow its exec(). */
|
if (inferior_pid == pending_follow.fork_event.parent_pid)
|
if (inferior_pid == pending_follow.fork_event.parent_pid)
|
return;
|
return;
|
}
|
}
|
|
|
/* This is an exec event that we actually wish to pay attention to.
|
/* This is an exec event that we actually wish to pay attention to.
|
Refresh our symbol table to the newly exec'd program, remove any
|
Refresh our symbol table to the newly exec'd program, remove any
|
momentary bp's, etc.
|
momentary bp's, etc.
|
|
|
If there are breakpoints, they aren't really inserted now,
|
If there are breakpoints, they aren't really inserted now,
|
since the exec() transformed our inferior into a fresh set
|
since the exec() transformed our inferior into a fresh set
|
of instructions.
|
of instructions.
|
|
|
We want to preserve symbolic breakpoints on the list, since
|
We want to preserve symbolic breakpoints on the list, since
|
we have hopes that they can be reset after the new a.out's
|
we have hopes that they can be reset after the new a.out's
|
symbol table is read.
|
symbol table is read.
|
|
|
However, any "raw" breakpoints must be removed from the list
|
However, any "raw" breakpoints must be removed from the list
|
(e.g., the solib bp's), since their address is probably invalid
|
(e.g., the solib bp's), since their address is probably invalid
|
now.
|
now.
|
|
|
And, we DON'T want to call delete_breakpoints() here, since
|
And, we DON'T want to call delete_breakpoints() here, since
|
that may write the bp's "shadow contents" (the instruction
|
that may write the bp's "shadow contents" (the instruction
|
value that was overwritten witha TRAP instruction). Since
|
value that was overwritten witha TRAP instruction). Since
|
we now have a new a.out, those shadow contents aren't valid. */
|
we now have a new a.out, those shadow contents aren't valid. */
|
update_breakpoints_after_exec ();
|
update_breakpoints_after_exec ();
|
|
|
/* If there was one, it's gone now. We cannot truly step-to-next
|
/* If there was one, it's gone now. We cannot truly step-to-next
|
statement through an exec(). */
|
statement through an exec(). */
|
step_resume_breakpoint = NULL;
|
step_resume_breakpoint = NULL;
|
step_range_start = 0;
|
step_range_start = 0;
|
step_range_end = 0;
|
step_range_end = 0;
|
|
|
/* If there was one, it's gone now. */
|
/* If there was one, it's gone now. */
|
through_sigtramp_breakpoint = NULL;
|
through_sigtramp_breakpoint = NULL;
|
|
|
/* What is this a.out's name? */
|
/* What is this a.out's name? */
|
printf_unfiltered ("Executing new program: %s\n", execd_pathname);
|
printf_unfiltered ("Executing new program: %s\n", execd_pathname);
|
|
|
/* We've followed the inferior through an exec. Therefore, the
|
/* We've followed the inferior through an exec. Therefore, the
|
inferior has essentially been killed & reborn. */
|
inferior has essentially been killed & reborn. */
|
|
|
/* First collect the run target in effect. */
|
/* First collect the run target in effect. */
|
tgt = find_run_target ();
|
tgt = find_run_target ();
|
/* If we can't find one, things are in a very strange state... */
|
/* If we can't find one, things are in a very strange state... */
|
if (tgt == NULL)
|
if (tgt == NULL)
|
error ("Could find run target to save before following exec");
|
error ("Could find run target to save before following exec");
|
|
|
gdb_flush (gdb_stdout);
|
gdb_flush (gdb_stdout);
|
target_mourn_inferior ();
|
target_mourn_inferior ();
|
inferior_pid = saved_pid; /* Because mourn_inferior resets inferior_pid. */
|
inferior_pid = saved_pid; /* Because mourn_inferior resets inferior_pid. */
|
push_target (tgt);
|
push_target (tgt);
|
|
|
/* That a.out is now the one to use. */
|
/* That a.out is now the one to use. */
|
exec_file_attach (execd_pathname, 0);
|
exec_file_attach (execd_pathname, 0);
|
|
|
/* And also is where symbols can be found. */
|
/* And also is where symbols can be found. */
|
symbol_file_command (execd_pathname, 0);
|
symbol_file_command (execd_pathname, 0);
|
|
|
/* Reset the shared library package. This ensures that we get
|
/* Reset the shared library package. This ensures that we get
|
a shlib event when the child reaches "_start", at which point
|
a shlib event when the child reaches "_start", at which point
|
the dld will have had a chance to initialize the child. */
|
the dld will have had a chance to initialize the child. */
|
#if defined(SOLIB_RESTART)
|
#if defined(SOLIB_RESTART)
|
SOLIB_RESTART ();
|
SOLIB_RESTART ();
|
#endif
|
#endif
|
#ifdef SOLIB_CREATE_INFERIOR_HOOK
|
#ifdef SOLIB_CREATE_INFERIOR_HOOK
|
SOLIB_CREATE_INFERIOR_HOOK (inferior_pid);
|
SOLIB_CREATE_INFERIOR_HOOK (inferior_pid);
|
#endif
|
#endif
|
|
|
/* Reinsert all breakpoints. (Those which were symbolic have
|
/* Reinsert all breakpoints. (Those which were symbolic have
|
been reset to the proper address in the new a.out, thanks
|
been reset to the proper address in the new a.out, thanks
|
to symbol_file_command...) */
|
to symbol_file_command...) */
|
insert_breakpoints ();
|
insert_breakpoints ();
|
|
|
/* The next resume of this inferior should bring it to the shlib
|
/* The next resume of this inferior should bring it to the shlib
|
startup breakpoints. (If the user had also set bp's on
|
startup breakpoints. (If the user had also set bp's on
|
"main" from the old (parent) process, then they'll auto-
|
"main" from the old (parent) process, then they'll auto-
|
matically get reset there in the new process.) */
|
matically get reset there in the new process.) */
|
}
|
}
|
|
|
/* Non-zero if we just simulating a single-step. This is needed
|
/* Non-zero if we just simulating a single-step. This is needed
|
because we cannot remove the breakpoints in the inferior process
|
because we cannot remove the breakpoints in the inferior process
|
until after the `wait' in `wait_for_inferior'. */
|
until after the `wait' in `wait_for_inferior'. */
|
static int singlestep_breakpoints_inserted_p = 0;
|
static int singlestep_breakpoints_inserted_p = 0;
|
|
|
|
|
/* Things to clean up if we QUIT out of resume (). */
|
/* Things to clean up if we QUIT out of resume (). */
|
/* ARGSUSED */
|
/* ARGSUSED */
|
static void
|
static void
|
resume_cleanups (int arg)
|
resume_cleanups (int arg)
|
{
|
{
|
normal_stop ();
|
normal_stop ();
|
}
|
}
|
|
|
static char schedlock_off[] = "off";
|
static char schedlock_off[] = "off";
|
static char schedlock_on[] = "on";
|
static char schedlock_on[] = "on";
|
static char schedlock_step[] = "step";
|
static char schedlock_step[] = "step";
|
static char *scheduler_mode = schedlock_off;
|
static char *scheduler_mode = schedlock_off;
|
static char *scheduler_enums[] =
|
static char *scheduler_enums[] =
|
{
|
{
|
schedlock_off,
|
schedlock_off,
|
schedlock_on,
|
schedlock_on,
|
schedlock_step,
|
schedlock_step,
|
NULL
|
NULL
|
};
|
};
|
|
|
static void
|
static void
|
set_schedlock_func (char *args, int from_tty, struct cmd_list_element *c)
|
set_schedlock_func (char *args, int from_tty, struct cmd_list_element *c)
|
{
|
{
|
if (c->type == set_cmd)
|
if (c->type == set_cmd)
|
if (!target_can_lock_scheduler)
|
if (!target_can_lock_scheduler)
|
{
|
{
|
scheduler_mode = schedlock_off;
|
scheduler_mode = schedlock_off;
|
error ("Target '%s' cannot support this command.",
|
error ("Target '%s' cannot support this command.",
|
target_shortname);
|
target_shortname);
|
}
|
}
|
}
|
}
|
|
|
|
|
|
|
|
|
/* Resume the inferior, but allow a QUIT. This is useful if the user
|
/* Resume the inferior, but allow a QUIT. This is useful if the user
|
wants to interrupt some lengthy single-stepping operation
|
wants to interrupt some lengthy single-stepping operation
|
(for child processes, the SIGINT goes to the inferior, and so
|
(for child processes, the SIGINT goes to the inferior, and so
|
we get a SIGINT random_signal, but for remote debugging and perhaps
|
we get a SIGINT random_signal, but for remote debugging and perhaps
|
other targets, that's not true).
|
other targets, that's not true).
|
|
|
STEP nonzero if we should step (zero to continue instead).
|
STEP nonzero if we should step (zero to continue instead).
|
SIG is the signal to give the inferior (zero for none). */
|
SIG is the signal to give the inferior (zero for none). */
|
void
|
void
|
resume (int step, enum target_signal sig)
|
resume (int step, enum target_signal sig)
|
{
|
{
|
int should_resume = 1;
|
int should_resume = 1;
|
struct cleanup *old_cleanups = make_cleanup ((make_cleanup_func)
|
struct cleanup *old_cleanups = make_cleanup ((make_cleanup_func)
|
resume_cleanups, 0);
|
resume_cleanups, 0);
|
QUIT;
|
QUIT;
|
|
|
#ifdef CANNOT_STEP_BREAKPOINT
|
#ifdef CANNOT_STEP_BREAKPOINT
|
/* Most targets can step a breakpoint instruction, thus executing it
|
/* Most targets can step a breakpoint instruction, thus executing it
|
normally. But if this one cannot, just continue and we will hit
|
normally. But if this one cannot, just continue and we will hit
|
it anyway. */
|
it anyway. */
|
if (step && breakpoints_inserted && breakpoint_here_p (read_pc ()))
|
if (step && breakpoints_inserted && breakpoint_here_p (read_pc ()))
|
step = 0;
|
step = 0;
|
#endif
|
#endif
|
|
|
/* Some targets (e.g. Solaris x86) have a kernel bug when stepping
|
/* Some targets (e.g. Solaris x86) have a kernel bug when stepping
|
over an instruction that causes a page fault without triggering
|
over an instruction that causes a page fault without triggering
|
a hardware watchpoint. The kernel properly notices that it shouldn't
|
a hardware watchpoint. The kernel properly notices that it shouldn't
|
stop, because the hardware watchpoint is not triggered, but it forgets
|
stop, because the hardware watchpoint is not triggered, but it forgets
|
the step request and continues the program normally.
|
the step request and continues the program normally.
|
Work around the problem by removing hardware watchpoints if a step is
|
Work around the problem by removing hardware watchpoints if a step is
|
requested, GDB will check for a hardware watchpoint trigger after the
|
requested, GDB will check for a hardware watchpoint trigger after the
|
step anyway. */
|
step anyway. */
|
if (CANNOT_STEP_HW_WATCHPOINTS && step && breakpoints_inserted)
|
if (CANNOT_STEP_HW_WATCHPOINTS && step && breakpoints_inserted)
|
remove_hw_watchpoints ();
|
remove_hw_watchpoints ();
|
|
|
|
|
/* Normally, by the time we reach `resume', the breakpoints are either
|
/* Normally, by the time we reach `resume', the breakpoints are either
|
removed or inserted, as appropriate. The exception is if we're sitting
|
removed or inserted, as appropriate. The exception is if we're sitting
|
at a permanent breakpoint; we need to step over it, but permanent
|
at a permanent breakpoint; we need to step over it, but permanent
|
breakpoints can't be removed. So we have to test for it here. */
|
breakpoints can't be removed. So we have to test for it here. */
|
if (breakpoint_here_p (read_pc ()) == permanent_breakpoint_here)
|
if (breakpoint_here_p (read_pc ()) == permanent_breakpoint_here)
|
SKIP_PERMANENT_BREAKPOINT ();
|
SKIP_PERMANENT_BREAKPOINT ();
|
|
|
if (SOFTWARE_SINGLE_STEP_P && step)
|
if (SOFTWARE_SINGLE_STEP_P && step)
|
{
|
{
|
/* Do it the hard way, w/temp breakpoints */
|
/* Do it the hard way, w/temp breakpoints */
|
SOFTWARE_SINGLE_STEP (sig, 1 /*insert-breakpoints */ );
|
SOFTWARE_SINGLE_STEP (sig, 1 /*insert-breakpoints */ );
|
/* ...and don't ask hardware to do it. */
|
/* ...and don't ask hardware to do it. */
|
step = 0;
|
step = 0;
|
/* and do not pull these breakpoints until after a `wait' in
|
/* and do not pull these breakpoints until after a `wait' in
|
`wait_for_inferior' */
|
`wait_for_inferior' */
|
singlestep_breakpoints_inserted_p = 1;
|
singlestep_breakpoints_inserted_p = 1;
|
}
|
}
|
|
|
/* Handle any optimized stores to the inferior NOW... */
|
/* Handle any optimized stores to the inferior NOW... */
|
#ifdef DO_DEFERRED_STORES
|
#ifdef DO_DEFERRED_STORES
|
DO_DEFERRED_STORES;
|
DO_DEFERRED_STORES;
|
#endif
|
#endif
|
|
|
/* If there were any forks/vforks/execs that were caught and are
|
/* If there were any forks/vforks/execs that were caught and are
|
now to be followed, then do so. */
|
now to be followed, then do so. */
|
switch (pending_follow.kind)
|
switch (pending_follow.kind)
|
{
|
{
|
case (TARGET_WAITKIND_FORKED):
|
case (TARGET_WAITKIND_FORKED):
|
pending_follow.kind = TARGET_WAITKIND_SPURIOUS;
|
pending_follow.kind = TARGET_WAITKIND_SPURIOUS;
|
follow_fork (inferior_pid, pending_follow.fork_event.child_pid);
|
follow_fork (inferior_pid, pending_follow.fork_event.child_pid);
|
break;
|
break;
|
|
|
case (TARGET_WAITKIND_VFORKED):
|
case (TARGET_WAITKIND_VFORKED):
|
{
|
{
|
int saw_child_exec = pending_follow.fork_event.saw_child_exec;
|
int saw_child_exec = pending_follow.fork_event.saw_child_exec;
|
|
|
pending_follow.kind = TARGET_WAITKIND_SPURIOUS;
|
pending_follow.kind = TARGET_WAITKIND_SPURIOUS;
|
follow_vfork (inferior_pid, pending_follow.fork_event.child_pid);
|
follow_vfork (inferior_pid, pending_follow.fork_event.child_pid);
|
|
|
/* Did we follow the child, but not yet see the child's exec event?
|
/* Did we follow the child, but not yet see the child's exec event?
|
If so, then it actually ought to be waiting for us; we respond to
|
If so, then it actually ought to be waiting for us; we respond to
|
parent vfork events. We don't actually want to resume the child
|
parent vfork events. We don't actually want to resume the child
|
in this situation; we want to just get its exec event. */
|
in this situation; we want to just get its exec event. */
|
if (!saw_child_exec &&
|
if (!saw_child_exec &&
|
(inferior_pid == pending_follow.fork_event.child_pid))
|
(inferior_pid == pending_follow.fork_event.child_pid))
|
should_resume = 0;
|
should_resume = 0;
|
}
|
}
|
break;
|
break;
|
|
|
case (TARGET_WAITKIND_EXECD):
|
case (TARGET_WAITKIND_EXECD):
|
/* If we saw a vfork event but couldn't follow it until we saw
|
/* If we saw a vfork event but couldn't follow it until we saw
|
an exec, then now might be the time! */
|
an exec, then now might be the time! */
|
pending_follow.kind = TARGET_WAITKIND_SPURIOUS;
|
pending_follow.kind = TARGET_WAITKIND_SPURIOUS;
|
/* follow_exec is called as soon as the exec event is seen. */
|
/* follow_exec is called as soon as the exec event is seen. */
|
break;
|
break;
|
|
|
default:
|
default:
|
break;
|
break;
|
}
|
}
|
|
|
/* Install inferior's terminal modes. */
|
/* Install inferior's terminal modes. */
|
target_terminal_inferior ();
|
target_terminal_inferior ();
|
|
|
if (should_resume)
|
if (should_resume)
|
{
|
{
|
int resume_pid;
|
int resume_pid;
|
|
|
if (use_thread_step_needed && thread_step_needed)
|
if (use_thread_step_needed && thread_step_needed)
|
{
|
{
|
/* We stopped on a BPT instruction;
|
/* We stopped on a BPT instruction;
|
don't continue other threads and
|
don't continue other threads and
|
just step this thread. */
|
just step this thread. */
|
thread_step_needed = 0;
|
thread_step_needed = 0;
|
|
|
if (!breakpoint_here_p (read_pc ()))
|
if (!breakpoint_here_p (read_pc ()))
|
{
|
{
|
/* Breakpoint deleted: ok to do regular resume
|
/* Breakpoint deleted: ok to do regular resume
|
where all the threads either step or continue. */
|
where all the threads either step or continue. */
|
resume_pid = -1;
|
resume_pid = -1;
|
}
|
}
|
else
|
else
|
{
|
{
|
if (!step)
|
if (!step)
|
{
|
{
|
warning ("Internal error, changing continue to step.");
|
warning ("Internal error, changing continue to step.");
|
remove_breakpoints ();
|
remove_breakpoints ();
|
breakpoints_inserted = 0;
|
breakpoints_inserted = 0;
|
trap_expected = 1;
|
trap_expected = 1;
|
step = 1;
|
step = 1;
|
}
|
}
|
resume_pid = inferior_pid;
|
resume_pid = inferior_pid;
|
}
|
}
|
}
|
}
|
else
|
else
|
{
|
{
|
/* Vanilla resume. */
|
/* Vanilla resume. */
|
if ((scheduler_mode == schedlock_on) ||
|
if ((scheduler_mode == schedlock_on) ||
|
(scheduler_mode == schedlock_step && step != 0))
|
(scheduler_mode == schedlock_step && step != 0))
|
resume_pid = inferior_pid;
|
resume_pid = inferior_pid;
|
else
|
else
|
resume_pid = -1;
|
resume_pid = -1;
|
}
|
}
|
target_resume (resume_pid, step, sig);
|
target_resume (resume_pid, step, sig);
|
}
|
}
|
|
|
discard_cleanups (old_cleanups);
|
discard_cleanups (old_cleanups);
|
}
|
}
|
|
|
|
|
/* Clear out all variables saying what to do when inferior is continued.
|
/* Clear out all variables saying what to do when inferior is continued.
|
First do this, then set the ones you want, then call `proceed'. */
|
First do this, then set the ones you want, then call `proceed'. */
|
|
|
void
|
void
|
clear_proceed_status (void)
|
clear_proceed_status (void)
|
{
|
{
|
trap_expected = 0;
|
trap_expected = 0;
|
step_range_start = 0;
|
step_range_start = 0;
|
step_range_end = 0;
|
step_range_end = 0;
|
step_frame_address = 0;
|
step_frame_address = 0;
|
step_over_calls = -1;
|
step_over_calls = -1;
|
stop_after_trap = 0;
|
stop_after_trap = 0;
|
stop_soon_quietly = 0;
|
stop_soon_quietly = 0;
|
proceed_to_finish = 0;
|
proceed_to_finish = 0;
|
breakpoint_proceeded = 1; /* We're about to proceed... */
|
breakpoint_proceeded = 1; /* We're about to proceed... */
|
|
|
/* Discard any remaining commands or status from previous stop. */
|
/* Discard any remaining commands or status from previous stop. */
|
bpstat_clear (&stop_bpstat);
|
bpstat_clear (&stop_bpstat);
|
}
|
}
|
|
|
/* Basic routine for continuing the program in various fashions.
|
/* Basic routine for continuing the program in various fashions.
|
|
|
ADDR is the address to resume at, or -1 for resume where stopped.
|
ADDR is the address to resume at, or -1 for resume where stopped.
|
SIGGNAL is the signal to give it, or 0 for none,
|
SIGGNAL is the signal to give it, or 0 for none,
|
or -1 for act according to how it stopped.
|
or -1 for act according to how it stopped.
|
STEP is nonzero if should trap after one instruction.
|
STEP is nonzero if should trap after one instruction.
|
-1 means return after that and print nothing.
|
-1 means return after that and print nothing.
|
You should probably set various step_... variables
|
You should probably set various step_... variables
|
before calling here, if you are stepping.
|
before calling here, if you are stepping.
|
|
|
You should call clear_proceed_status before calling proceed. */
|
You should call clear_proceed_status before calling proceed. */
|
|
|
void
|
void
|
proceed (CORE_ADDR addr, enum target_signal siggnal, int step)
|
proceed (CORE_ADDR addr, enum target_signal siggnal, int step)
|
{
|
{
|
int oneproc = 0;
|
int oneproc = 0;
|
|
|
if (step > 0)
|
if (step > 0)
|
step_start_function = find_pc_function (read_pc ());
|
step_start_function = find_pc_function (read_pc ());
|
if (step < 0)
|
if (step < 0)
|
stop_after_trap = 1;
|
stop_after_trap = 1;
|
|
|
if (addr == (CORE_ADDR) -1)
|
if (addr == (CORE_ADDR) -1)
|
{
|
{
|
/* If there is a breakpoint at the address we will resume at,
|
/* If there is a breakpoint at the address we will resume at,
|
step one instruction before inserting breakpoints
|
step one instruction before inserting breakpoints
|
so that we do not stop right away (and report a second
|
so that we do not stop right away (and report a second
|
hit at this breakpoint). */
|
hit at this breakpoint). */
|
|
|
if (read_pc () == stop_pc && breakpoint_here_p (read_pc ()))
|
if (read_pc () == stop_pc && breakpoint_here_p (read_pc ()))
|
oneproc = 1;
|
oneproc = 1;
|
|
|
#ifndef STEP_SKIPS_DELAY
|
#ifndef STEP_SKIPS_DELAY
|
#define STEP_SKIPS_DELAY(pc) (0)
|
#define STEP_SKIPS_DELAY(pc) (0)
|
#define STEP_SKIPS_DELAY_P (0)
|
#define STEP_SKIPS_DELAY_P (0)
|
#endif
|
#endif
|
/* Check breakpoint_here_p first, because breakpoint_here_p is fast
|
/* Check breakpoint_here_p first, because breakpoint_here_p is fast
|
(it just checks internal GDB data structures) and STEP_SKIPS_DELAY
|
(it just checks internal GDB data structures) and STEP_SKIPS_DELAY
|
is slow (it needs to read memory from the target). */
|
is slow (it needs to read memory from the target). */
|
if (STEP_SKIPS_DELAY_P
|
if (STEP_SKIPS_DELAY_P
|
&& breakpoint_here_p (read_pc () + 4)
|
&& breakpoint_here_p (read_pc () + 4)
|
&& STEP_SKIPS_DELAY (read_pc ()))
|
&& STEP_SKIPS_DELAY (read_pc ()))
|
oneproc = 1;
|
oneproc = 1;
|
}
|
}
|
else
|
else
|
{
|
{
|
write_pc (addr);
|
write_pc (addr);
|
|
|
/* New address; we don't need to single-step a thread
|
/* New address; we don't need to single-step a thread
|
over a breakpoint we just hit, 'cause we aren't
|
over a breakpoint we just hit, 'cause we aren't
|
continuing from there.
|
continuing from there.
|
|
|
It's not worth worrying about the case where a user
|
It's not worth worrying about the case where a user
|
asks for a "jump" at the current PC--if they get the
|
asks for a "jump" at the current PC--if they get the
|
hiccup of re-hiting a hit breakpoint, what else do
|
hiccup of re-hiting a hit breakpoint, what else do
|
they expect? */
|
they expect? */
|
thread_step_needed = 0;
|
thread_step_needed = 0;
|
}
|
}
|
|
|
#ifdef PREPARE_TO_PROCEED
|
#ifdef PREPARE_TO_PROCEED
|
/* In a multi-threaded task we may select another thread
|
/* In a multi-threaded task we may select another thread
|
and then continue or step.
|
and then continue or step.
|
|
|
But if the old thread was stopped at a breakpoint, it
|
But if the old thread was stopped at a breakpoint, it
|
will immediately cause another breakpoint stop without
|
will immediately cause another breakpoint stop without
|
any execution (i.e. it will report a breakpoint hit
|
any execution (i.e. it will report a breakpoint hit
|
incorrectly). So we must step over it first.
|
incorrectly). So we must step over it first.
|
|
|
PREPARE_TO_PROCEED checks the current thread against the thread
|
PREPARE_TO_PROCEED checks the current thread against the thread
|
that reported the most recent event. If a step-over is required
|
that reported the most recent event. If a step-over is required
|
it returns TRUE and sets the current thread to the old thread. */
|
it returns TRUE and sets the current thread to the old thread. */
|
if (PREPARE_TO_PROCEED (1) && breakpoint_here_p (read_pc ()))
|
if (PREPARE_TO_PROCEED (1) && breakpoint_here_p (read_pc ()))
|
{
|
{
|
oneproc = 1;
|
oneproc = 1;
|
thread_step_needed = 1;
|
thread_step_needed = 1;
|
}
|
}
|
|
|
#endif /* PREPARE_TO_PROCEED */
|
#endif /* PREPARE_TO_PROCEED */
|
|
|
#ifdef HP_OS_BUG
|
#ifdef HP_OS_BUG
|
if (trap_expected_after_continue)
|
if (trap_expected_after_continue)
|
{
|
{
|
/* If (step == 0), a trap will be automatically generated after
|
/* If (step == 0), a trap will be automatically generated after
|
the first instruction is executed. Force step one
|
the first instruction is executed. Force step one
|
instruction to clear this condition. This should not occur
|
instruction to clear this condition. This should not occur
|
if step is nonzero, but it is harmless in that case. */
|
if step is nonzero, but it is harmless in that case. */
|
oneproc = 1;
|
oneproc = 1;
|
trap_expected_after_continue = 0;
|
trap_expected_after_continue = 0;
|
}
|
}
|
#endif /* HP_OS_BUG */
|
#endif /* HP_OS_BUG */
|
|
|
if (oneproc)
|
if (oneproc)
|
/* We will get a trace trap after one instruction.
|
/* We will get a trace trap after one instruction.
|
Continue it automatically and insert breakpoints then. */
|
Continue it automatically and insert breakpoints then. */
|
trap_expected = 1;
|
trap_expected = 1;
|
else
|
else
|
{
|
{
|
int temp = insert_breakpoints ();
|
int temp = insert_breakpoints ();
|
if (temp)
|
if (temp)
|
{
|
{
|
print_sys_errmsg ("insert_breakpoints", temp);
|
print_sys_errmsg ("insert_breakpoints", temp);
|
error ("Cannot insert breakpoints.\n\
|
error ("Cannot insert breakpoints.\n\
|
The same program may be running in another process,\n\
|
The same program may be running in another process,\n\
|
or you may have requested too many hardware\n\
|
or you may have requested too many hardware\n\
|
breakpoints and/or watchpoints.\n");
|
breakpoints and/or watchpoints.\n");
|
}
|
}
|
|
|
breakpoints_inserted = 1;
|
breakpoints_inserted = 1;
|
}
|
}
|
|
|
if (siggnal != TARGET_SIGNAL_DEFAULT)
|
if (siggnal != TARGET_SIGNAL_DEFAULT)
|
stop_signal = siggnal;
|
stop_signal = siggnal;
|
/* If this signal should not be seen by program,
|
/* If this signal should not be seen by program,
|
give it zero. Used for debugging signals. */
|
give it zero. Used for debugging signals. */
|
else if (!signal_program[stop_signal])
|
else if (!signal_program[stop_signal])
|
stop_signal = TARGET_SIGNAL_0;
|
stop_signal = TARGET_SIGNAL_0;
|
|
|
annotate_starting ();
|
annotate_starting ();
|
|
|
/* Make sure that output from GDB appears before output from the
|
/* Make sure that output from GDB appears before output from the
|
inferior. */
|
inferior. */
|
gdb_flush (gdb_stdout);
|
gdb_flush (gdb_stdout);
|
|
|
/* Resume inferior. */
|
/* Resume inferior. */
|
resume (oneproc || step || bpstat_should_step (), stop_signal);
|
resume (oneproc || step || bpstat_should_step (), stop_signal);
|
|
|
/* Wait for it to stop (if not standalone)
|
/* Wait for it to stop (if not standalone)
|
and in any case decode why it stopped, and act accordingly. */
|
and in any case decode why it stopped, and act accordingly. */
|
/* Do this only if we are not using the event loop, or if the target
|
/* Do this only if we are not using the event loop, or if the target
|
does not support asynchronous execution. */
|
does not support asynchronous execution. */
|
if (!event_loop_p || !target_can_async_p ())
|
if (!event_loop_p || !target_can_async_p ())
|
{
|
{
|
wait_for_inferior ();
|
wait_for_inferior ();
|
normal_stop ();
|
normal_stop ();
|
}
|
}
|
}
|
}
|
|
|
/* Record the pc and sp of the program the last time it stopped.
|
/* Record the pc and sp of the program the last time it stopped.
|
These are just used internally by wait_for_inferior, but need
|
These are just used internally by wait_for_inferior, but need
|
to be preserved over calls to it and cleared when the inferior
|
to be preserved over calls to it and cleared when the inferior
|
is started. */
|
is started. */
|
static CORE_ADDR prev_pc;
|
static CORE_ADDR prev_pc;
|
static CORE_ADDR prev_func_start;
|
static CORE_ADDR prev_func_start;
|
static char *prev_func_name;
|
static char *prev_func_name;
|
|
|
|
|
/* Start remote-debugging of a machine over a serial link. */
|
/* Start remote-debugging of a machine over a serial link. */
|
|
|
void
|
void
|
start_remote (void)
|
start_remote (void)
|
{
|
{
|
init_thread_list ();
|
init_thread_list ();
|
init_wait_for_inferior ();
|
init_wait_for_inferior ();
|
stop_soon_quietly = 1;
|
stop_soon_quietly = 1;
|
trap_expected = 0;
|
trap_expected = 0;
|
|
|
/* Always go on waiting for the target, regardless of the mode. */
|
/* Always go on waiting for the target, regardless of the mode. */
|
/* FIXME: cagney/1999-09-23: At present it isn't possible to
|
/* FIXME: cagney/1999-09-23: At present it isn't possible to
|
indicate th wait_for_inferior that a target should timeout if
|
indicate th wait_for_inferior that a target should timeout if
|
nothing is returned (instead of just blocking). Because of this,
|
nothing is returned (instead of just blocking). Because of this,
|
targets expecting an immediate response need to, internally, set
|
targets expecting an immediate response need to, internally, set
|
things up so that the target_wait() is forced to eventually
|
things up so that the target_wait() is forced to eventually
|
timeout. */
|
timeout. */
|
/* FIXME: cagney/1999-09-24: It isn't possible for target_open() to
|
/* FIXME: cagney/1999-09-24: It isn't possible for target_open() to
|
differentiate to its caller what the state of the target is after
|
differentiate to its caller what the state of the target is after
|
the initial open has been performed. Here we're assuming that
|
the initial open has been performed. Here we're assuming that
|
the target has stopped. It should be possible to eventually have
|
the target has stopped. It should be possible to eventually have
|
target_open() return to the caller an indication that the target
|
target_open() return to the caller an indication that the target
|
is currently running and GDB state should be set to the same as
|
is currently running and GDB state should be set to the same as
|
for an async run. */
|
for an async run. */
|
wait_for_inferior ();
|
wait_for_inferior ();
|
normal_stop ();
|
normal_stop ();
|
}
|
}
|
|
|
/* Initialize static vars when a new inferior begins. */
|
/* Initialize static vars when a new inferior begins. */
|
|
|
void
|
void
|
init_wait_for_inferior (void)
|
init_wait_for_inferior (void)
|
{
|
{
|
/* These are meaningless until the first time through wait_for_inferior. */
|
/* These are meaningless until the first time through wait_for_inferior. */
|
prev_pc = 0;
|
prev_pc = 0;
|
prev_func_start = 0;
|
prev_func_start = 0;
|
prev_func_name = NULL;
|
prev_func_name = NULL;
|
|
|
#ifdef HP_OS_BUG
|
#ifdef HP_OS_BUG
|
trap_expected_after_continue = 0;
|
trap_expected_after_continue = 0;
|
#endif
|
#endif
|
breakpoints_inserted = 0;
|
breakpoints_inserted = 0;
|
breakpoint_init_inferior (inf_starting);
|
breakpoint_init_inferior (inf_starting);
|
|
|
/* Don't confuse first call to proceed(). */
|
/* Don't confuse first call to proceed(). */
|
stop_signal = TARGET_SIGNAL_0;
|
stop_signal = TARGET_SIGNAL_0;
|
|
|
/* The first resume is not following a fork/vfork/exec. */
|
/* The first resume is not following a fork/vfork/exec. */
|
pending_follow.kind = TARGET_WAITKIND_SPURIOUS; /* I.e., none. */
|
pending_follow.kind = TARGET_WAITKIND_SPURIOUS; /* I.e., none. */
|
pending_follow.fork_event.saw_parent_fork = 0;
|
pending_follow.fork_event.saw_parent_fork = 0;
|
pending_follow.fork_event.saw_child_fork = 0;
|
pending_follow.fork_event.saw_child_fork = 0;
|
pending_follow.fork_event.saw_child_exec = 0;
|
pending_follow.fork_event.saw_child_exec = 0;
|
|
|
/* See wait_for_inferior's handling of SYSCALL_ENTRY/RETURN events. */
|
/* See wait_for_inferior's handling of SYSCALL_ENTRY/RETURN events. */
|
number_of_threads_in_syscalls = 0;
|
number_of_threads_in_syscalls = 0;
|
|
|
clear_proceed_status ();
|
clear_proceed_status ();
|
}
|
}
|
|
|
static void
|
static void
|
delete_breakpoint_current_contents (void *arg)
|
delete_breakpoint_current_contents (void *arg)
|
{
|
{
|
struct breakpoint **breakpointp = (struct breakpoint **) arg;
|
struct breakpoint **breakpointp = (struct breakpoint **) arg;
|
if (*breakpointp != NULL)
|
if (*breakpointp != NULL)
|
{
|
{
|
delete_breakpoint (*breakpointp);
|
delete_breakpoint (*breakpointp);
|
*breakpointp = NULL;
|
*breakpointp = NULL;
|
}
|
}
|
}
|
}
|
|
|
/* This enum encodes possible reasons for doing a target_wait, so that
|
/* This enum encodes possible reasons for doing a target_wait, so that
|
wfi can call target_wait in one place. (Ultimately the call will be
|
wfi can call target_wait in one place. (Ultimately the call will be
|
moved out of the infinite loop entirely.) */
|
moved out of the infinite loop entirely.) */
|
|
|
enum infwait_states
|
enum infwait_states
|
{
|
{
|
infwait_normal_state,
|
infwait_normal_state,
|
infwait_thread_hop_state,
|
infwait_thread_hop_state,
|
infwait_nullified_state,
|
infwait_nullified_state,
|
infwait_nonstep_watch_state
|
infwait_nonstep_watch_state
|
};
|
};
|
|
|
/* Why did the inferior stop? Used to print the appropriate messages
|
/* Why did the inferior stop? Used to print the appropriate messages
|
to the interface from within handle_inferior_event(). */
|
to the interface from within handle_inferior_event(). */
|
enum inferior_stop_reason
|
enum inferior_stop_reason
|
{
|
{
|
/* We don't know why. */
|
/* We don't know why. */
|
STOP_UNKNOWN,
|
STOP_UNKNOWN,
|
/* Step, next, nexti, stepi finished. */
|
/* Step, next, nexti, stepi finished. */
|
END_STEPPING_RANGE,
|
END_STEPPING_RANGE,
|
/* Found breakpoint. */
|
/* Found breakpoint. */
|
BREAKPOINT_HIT,
|
BREAKPOINT_HIT,
|
/* Inferior terminated by signal. */
|
/* Inferior terminated by signal. */
|
SIGNAL_EXITED,
|
SIGNAL_EXITED,
|
/* Inferior exited. */
|
/* Inferior exited. */
|
EXITED,
|
EXITED,
|
/* Inferior received signal, and user asked to be notified. */
|
/* Inferior received signal, and user asked to be notified. */
|
SIGNAL_RECEIVED
|
SIGNAL_RECEIVED
|
};
|
};
|
|
|
/* This structure contains what used to be local variables in
|
/* This structure contains what used to be local variables in
|
wait_for_inferior. Probably many of them can return to being
|
wait_for_inferior. Probably many of them can return to being
|
locals in handle_inferior_event. */
|
locals in handle_inferior_event. */
|
|
|
struct execution_control_state
|
struct execution_control_state
|
{
|
{
|
struct target_waitstatus ws;
|
struct target_waitstatus ws;
|
struct target_waitstatus *wp;
|
struct target_waitstatus *wp;
|
int another_trap;
|
int another_trap;
|
int random_signal;
|
int random_signal;
|
CORE_ADDR stop_func_start;
|
CORE_ADDR stop_func_start;
|
CORE_ADDR stop_func_end;
|
CORE_ADDR stop_func_end;
|
char *stop_func_name;
|
char *stop_func_name;
|
struct symtab_and_line sal;
|
struct symtab_and_line sal;
|
int remove_breakpoints_on_following_step;
|
int remove_breakpoints_on_following_step;
|
int current_line;
|
int current_line;
|
struct symtab *current_symtab;
|
struct symtab *current_symtab;
|
int handling_longjmp; /* FIXME */
|
int handling_longjmp; /* FIXME */
|
int pid;
|
int pid;
|
int saved_inferior_pid;
|
int saved_inferior_pid;
|
int update_step_sp;
|
int update_step_sp;
|
int stepping_through_solib_after_catch;
|
int stepping_through_solib_after_catch;
|
bpstat stepping_through_solib_catchpoints;
|
bpstat stepping_through_solib_catchpoints;
|
int enable_hw_watchpoints_after_wait;
|
int enable_hw_watchpoints_after_wait;
|
int stepping_through_sigtramp;
|
int stepping_through_sigtramp;
|
int new_thread_event;
|
int new_thread_event;
|
struct target_waitstatus tmpstatus;
|
struct target_waitstatus tmpstatus;
|
enum infwait_states infwait_state;
|
enum infwait_states infwait_state;
|
int waiton_pid;
|
int waiton_pid;
|
int wait_some_more;
|
int wait_some_more;
|
};
|
};
|
|
|
void init_execution_control_state (struct execution_control_state * ecs);
|
void init_execution_control_state (struct execution_control_state * ecs);
|
|
|
void handle_inferior_event (struct execution_control_state * ecs);
|
void handle_inferior_event (struct execution_control_state * ecs);
|
|
|
static void check_sigtramp2 (struct execution_control_state *ecs);
|
static void check_sigtramp2 (struct execution_control_state *ecs);
|
static void step_into_function (struct execution_control_state *ecs);
|
static void step_into_function (struct execution_control_state *ecs);
|
static void step_over_function (struct execution_control_state *ecs);
|
static void step_over_function (struct execution_control_state *ecs);
|
static void stop_stepping (struct execution_control_state *ecs);
|
static void stop_stepping (struct execution_control_state *ecs);
|
static void prepare_to_wait (struct execution_control_state *ecs);
|
static void prepare_to_wait (struct execution_control_state *ecs);
|
static void keep_going (struct execution_control_state *ecs);
|
static void keep_going (struct execution_control_state *ecs);
|
static void print_stop_reason (enum inferior_stop_reason stop_reason, int stop_info);
|
static void print_stop_reason (enum inferior_stop_reason stop_reason, int stop_info);
|
|
|
/* Wait for control to return from inferior to debugger.
|
/* Wait for control to return from inferior to debugger.
|
If inferior gets a signal, we may decide to start it up again
|
If inferior gets a signal, we may decide to start it up again
|
instead of returning. That is why there is a loop in this function.
|
instead of returning. That is why there is a loop in this function.
|
When this function actually returns it means the inferior
|
When this function actually returns it means the inferior
|
should be left stopped and GDB should read more commands. */
|
should be left stopped and GDB should read more commands. */
|
|
|
void
|
void
|
wait_for_inferior (void)
|
wait_for_inferior (void)
|
{
|
{
|
struct cleanup *old_cleanups;
|
struct cleanup *old_cleanups;
|
struct execution_control_state ecss;
|
struct execution_control_state ecss;
|
struct execution_control_state *ecs;
|
struct execution_control_state *ecs;
|
|
|
old_cleanups = make_cleanup (delete_breakpoint_current_contents,
|
old_cleanups = make_cleanup (delete_breakpoint_current_contents,
|
&step_resume_breakpoint);
|
&step_resume_breakpoint);
|
make_cleanup (delete_breakpoint_current_contents,
|
make_cleanup (delete_breakpoint_current_contents,
|
&through_sigtramp_breakpoint);
|
&through_sigtramp_breakpoint);
|
|
|
/* wfi still stays in a loop, so it's OK just to take the address of
|
/* wfi still stays in a loop, so it's OK just to take the address of
|
a local to get the ecs pointer. */
|
a local to get the ecs pointer. */
|
ecs = &ecss;
|
ecs = &ecss;
|
|
|
/* Fill in with reasonable starting values. */
|
/* Fill in with reasonable starting values. */
|
init_execution_control_state (ecs);
|
init_execution_control_state (ecs);
|
|
|
thread_step_needed = 0;
|
thread_step_needed = 0;
|
|
|
/* We'll update this if & when we switch to a new thread. */
|
/* We'll update this if & when we switch to a new thread. */
|
previous_inferior_pid = inferior_pid;
|
previous_inferior_pid = inferior_pid;
|
|
|
overlay_cache_invalid = 1;
|
overlay_cache_invalid = 1;
|
|
|
/* We have to invalidate the registers BEFORE calling target_wait
|
/* We have to invalidate the registers BEFORE calling target_wait
|
because they can be loaded from the target while in target_wait.
|
because they can be loaded from the target while in target_wait.
|
This makes remote debugging a bit more efficient for those
|
This makes remote debugging a bit more efficient for those
|
targets that provide critical registers as part of their normal
|
targets that provide critical registers as part of their normal
|
status mechanism. */
|
status mechanism. */
|
|
|
registers_changed ();
|
registers_changed ();
|
|
|
while (1)
|
while (1)
|
{
|
{
|
if (target_wait_hook)
|
if (target_wait_hook)
|
ecs->pid = target_wait_hook (ecs->waiton_pid, ecs->wp);
|
ecs->pid = target_wait_hook (ecs->waiton_pid, ecs->wp);
|
else
|
else
|
ecs->pid = target_wait (ecs->waiton_pid, ecs->wp);
|
ecs->pid = target_wait (ecs->waiton_pid, ecs->wp);
|
|
|
/* Now figure out what to do with the result of the result. */
|
/* Now figure out what to do with the result of the result. */
|
handle_inferior_event (ecs);
|
handle_inferior_event (ecs);
|
|
|
if (!ecs->wait_some_more)
|
if (!ecs->wait_some_more)
|
break;
|
break;
|
}
|
}
|
do_cleanups (old_cleanups);
|
do_cleanups (old_cleanups);
|
}
|
}
|
|
|
/* Asynchronous version of wait_for_inferior. It is called by the
|
/* Asynchronous version of wait_for_inferior. It is called by the
|
event loop whenever a change of state is detected on the file
|
event loop whenever a change of state is detected on the file
|
descriptor corresponding to the target. It can be called more than
|
descriptor corresponding to the target. It can be called more than
|
once to complete a single execution command. In such cases we need
|
once to complete a single execution command. In such cases we need
|
to keep the state in a global variable ASYNC_ECSS. If it is the
|
to keep the state in a global variable ASYNC_ECSS. If it is the
|
last time that this function is called for a single execution
|
last time that this function is called for a single execution
|
command, then report to the user that the inferior has stopped, and
|
command, then report to the user that the inferior has stopped, and
|
do the necessary cleanups. */
|
do the necessary cleanups. */
|
|
|
struct execution_control_state async_ecss;
|
struct execution_control_state async_ecss;
|
struct execution_control_state *async_ecs;
|
struct execution_control_state *async_ecs;
|
|
|
void
|
void
|
fetch_inferior_event (client_data)
|
fetch_inferior_event (client_data)
|
void *client_data;
|
void *client_data;
|
{
|
{
|
static struct cleanup *old_cleanups;
|
static struct cleanup *old_cleanups;
|
|
|
async_ecs = &async_ecss;
|
async_ecs = &async_ecss;
|
|
|
if (!async_ecs->wait_some_more)
|
if (!async_ecs->wait_some_more)
|
{
|
{
|
old_cleanups = make_exec_cleanup (delete_breakpoint_current_contents,
|
old_cleanups = make_exec_cleanup (delete_breakpoint_current_contents,
|
&step_resume_breakpoint);
|
&step_resume_breakpoint);
|
make_exec_cleanup (delete_breakpoint_current_contents,
|
make_exec_cleanup (delete_breakpoint_current_contents,
|
&through_sigtramp_breakpoint);
|
&through_sigtramp_breakpoint);
|
|
|
/* Fill in with reasonable starting values. */
|
/* Fill in with reasonable starting values. */
|
init_execution_control_state (async_ecs);
|
init_execution_control_state (async_ecs);
|
|
|
thread_step_needed = 0;
|
thread_step_needed = 0;
|
|
|
/* We'll update this if & when we switch to a new thread. */
|
/* We'll update this if & when we switch to a new thread. */
|
previous_inferior_pid = inferior_pid;
|
previous_inferior_pid = inferior_pid;
|
|
|
overlay_cache_invalid = 1;
|
overlay_cache_invalid = 1;
|
|
|
/* We have to invalidate the registers BEFORE calling target_wait
|
/* We have to invalidate the registers BEFORE calling target_wait
|
because they can be loaded from the target while in target_wait.
|
because they can be loaded from the target while in target_wait.
|
This makes remote debugging a bit more efficient for those
|
This makes remote debugging a bit more efficient for those
|
targets that provide critical registers as part of their normal
|
targets that provide critical registers as part of their normal
|
status mechanism. */
|
status mechanism. */
|
|
|
registers_changed ();
|
registers_changed ();
|
}
|
}
|
|
|
if (target_wait_hook)
|
if (target_wait_hook)
|
async_ecs->pid = target_wait_hook (async_ecs->waiton_pid, async_ecs->wp);
|
async_ecs->pid = target_wait_hook (async_ecs->waiton_pid, async_ecs->wp);
|
else
|
else
|
async_ecs->pid = target_wait (async_ecs->waiton_pid, async_ecs->wp);
|
async_ecs->pid = target_wait (async_ecs->waiton_pid, async_ecs->wp);
|
|
|
/* Now figure out what to do with the result of the result. */
|
/* Now figure out what to do with the result of the result. */
|
handle_inferior_event (async_ecs);
|
handle_inferior_event (async_ecs);
|
|
|
if (!async_ecs->wait_some_more)
|
if (!async_ecs->wait_some_more)
|
{
|
{
|
/* Do only the cleanups that have been added by this
|
/* Do only the cleanups that have been added by this
|
function. Let the continuations for the commands do the rest,
|
function. Let the continuations for the commands do the rest,
|
if there are any. */
|
if there are any. */
|
do_exec_cleanups (old_cleanups);
|
do_exec_cleanups (old_cleanups);
|
normal_stop ();
|
normal_stop ();
|
if (step_multi && stop_step)
|
if (step_multi && stop_step)
|
inferior_event_handler (INF_EXEC_CONTINUE, NULL);
|
inferior_event_handler (INF_EXEC_CONTINUE, NULL);
|
else
|
else
|
inferior_event_handler (INF_EXEC_COMPLETE, NULL);
|
inferior_event_handler (INF_EXEC_COMPLETE, NULL);
|
}
|
}
|
}
|
}
|
|
|
/* Prepare an execution control state for looping through a
|
/* Prepare an execution control state for looping through a
|
wait_for_inferior-type loop. */
|
wait_for_inferior-type loop. */
|
|
|
void
|
void
|
init_execution_control_state (struct execution_control_state *ecs)
|
init_execution_control_state (struct execution_control_state *ecs)
|
{
|
{
|
/* ecs->another_trap? */
|
/* ecs->another_trap? */
|
ecs->random_signal = 0;
|
ecs->random_signal = 0;
|
ecs->remove_breakpoints_on_following_step = 0;
|
ecs->remove_breakpoints_on_following_step = 0;
|
ecs->handling_longjmp = 0; /* FIXME */
|
ecs->handling_longjmp = 0; /* FIXME */
|
ecs->update_step_sp = 0;
|
ecs->update_step_sp = 0;
|
ecs->stepping_through_solib_after_catch = 0;
|
ecs->stepping_through_solib_after_catch = 0;
|
ecs->stepping_through_solib_catchpoints = NULL;
|
ecs->stepping_through_solib_catchpoints = NULL;
|
ecs->enable_hw_watchpoints_after_wait = 0;
|
ecs->enable_hw_watchpoints_after_wait = 0;
|
ecs->stepping_through_sigtramp = 0;
|
ecs->stepping_through_sigtramp = 0;
|
ecs->sal = find_pc_line (prev_pc, 0);
|
ecs->sal = find_pc_line (prev_pc, 0);
|
ecs->current_line = ecs->sal.line;
|
ecs->current_line = ecs->sal.line;
|
ecs->current_symtab = ecs->sal.symtab;
|
ecs->current_symtab = ecs->sal.symtab;
|
ecs->infwait_state = infwait_normal_state;
|
ecs->infwait_state = infwait_normal_state;
|
ecs->waiton_pid = -1;
|
ecs->waiton_pid = -1;
|
ecs->wp = &(ecs->ws);
|
ecs->wp = &(ecs->ws);
|
}
|
}
|
|
|
/* Call this function before setting step_resume_breakpoint, as a
|
/* Call this function before setting step_resume_breakpoint, as a
|
sanity check. There should never be more than one step-resume
|
sanity check. There should never be more than one step-resume
|
breakpoint per thread, so we should never be setting a new
|
breakpoint per thread, so we should never be setting a new
|
step_resume_breakpoint when one is already active. */
|
step_resume_breakpoint when one is already active. */
|
static void
|
static void
|
check_for_old_step_resume_breakpoint (void)
|
check_for_old_step_resume_breakpoint (void)
|
{
|
{
|
if (step_resume_breakpoint)
|
if (step_resume_breakpoint)
|
warning ("GDB bug: infrun.c (wait_for_inferior): dropping old step_resume breakpoint");
|
warning ("GDB bug: infrun.c (wait_for_inferior): dropping old step_resume breakpoint");
|
}
|
}
|
|
|
/* Given an execution control state that has been freshly filled in
|
/* Given an execution control state that has been freshly filled in
|
by an event from the inferior, figure out what it means and take
|
by an event from the inferior, figure out what it means and take
|
appropriate action. */
|
appropriate action. */
|
|
|
void
|
void
|
handle_inferior_event (struct execution_control_state *ecs)
|
handle_inferior_event (struct execution_control_state *ecs)
|
{
|
{
|
CORE_ADDR tmp;
|
CORE_ADDR tmp;
|
int stepped_after_stopped_by_watchpoint;
|
int stepped_after_stopped_by_watchpoint;
|
|
|
/* Keep this extra brace for now, minimizes diffs. */
|
/* Keep this extra brace for now, minimizes diffs. */
|
{
|
{
|
switch (ecs->infwait_state)
|
switch (ecs->infwait_state)
|
{
|
{
|
case infwait_normal_state:
|
case infwait_normal_state:
|
/* Since we've done a wait, we have a new event. Don't
|
/* Since we've done a wait, we have a new event. Don't
|
carry over any expectations about needing to step over a
|
carry over any expectations about needing to step over a
|
breakpoint. */
|
breakpoint. */
|
thread_step_needed = 0;
|
thread_step_needed = 0;
|
|
|
/* See comments where a TARGET_WAITKIND_SYSCALL_RETURN event
|
/* See comments where a TARGET_WAITKIND_SYSCALL_RETURN event
|
is serviced in this loop, below. */
|
is serviced in this loop, below. */
|
if (ecs->enable_hw_watchpoints_after_wait)
|
if (ecs->enable_hw_watchpoints_after_wait)
|
{
|
{
|
TARGET_ENABLE_HW_WATCHPOINTS (inferior_pid);
|
TARGET_ENABLE_HW_WATCHPOINTS (inferior_pid);
|
ecs->enable_hw_watchpoints_after_wait = 0;
|
ecs->enable_hw_watchpoints_after_wait = 0;
|
}
|
}
|
stepped_after_stopped_by_watchpoint = 0;
|
stepped_after_stopped_by_watchpoint = 0;
|
break;
|
break;
|
|
|
case infwait_thread_hop_state:
|
case infwait_thread_hop_state:
|
insert_breakpoints ();
|
insert_breakpoints ();
|
|
|
/* We need to restart all the threads now,
|
/* We need to restart all the threads now,
|
* unles we're running in scheduler-locked mode.
|
* unles we're running in scheduler-locked mode.
|
* FIXME: shouldn't we look at currently_stepping ()?
|
* FIXME: shouldn't we look at currently_stepping ()?
|
*/
|
*/
|
if (scheduler_mode == schedlock_on)
|
if (scheduler_mode == schedlock_on)
|
target_resume (ecs->pid, 0, TARGET_SIGNAL_0);
|
target_resume (ecs->pid, 0, TARGET_SIGNAL_0);
|
else
|
else
|
target_resume (-1, 0, TARGET_SIGNAL_0);
|
target_resume (-1, 0, TARGET_SIGNAL_0);
|
ecs->infwait_state = infwait_normal_state;
|
ecs->infwait_state = infwait_normal_state;
|
prepare_to_wait (ecs);
|
prepare_to_wait (ecs);
|
return;
|
return;
|
|
|
case infwait_nullified_state:
|
case infwait_nullified_state:
|
break;
|
break;
|
|
|
case infwait_nonstep_watch_state:
|
case infwait_nonstep_watch_state:
|
insert_breakpoints ();
|
insert_breakpoints ();
|
|
|
/* FIXME-maybe: is this cleaner than setting a flag? Does it
|
/* FIXME-maybe: is this cleaner than setting a flag? Does it
|
handle things like signals arriving and other things happening
|
handle things like signals arriving and other things happening
|
in combination correctly? */
|
in combination correctly? */
|
stepped_after_stopped_by_watchpoint = 1;
|
stepped_after_stopped_by_watchpoint = 1;
|
break;
|
break;
|
}
|
}
|
ecs->infwait_state = infwait_normal_state;
|
ecs->infwait_state = infwait_normal_state;
|
|
|
flush_cached_frames ();
|
flush_cached_frames ();
|
|
|
/* If it's a new process, add it to the thread database */
|
/* If it's a new process, add it to the thread database */
|
|
|
ecs->new_thread_event = ((ecs->pid != inferior_pid) && !in_thread_list (ecs->pid));
|
ecs->new_thread_event = ((ecs->pid != inferior_pid) && !in_thread_list (ecs->pid));
|
|
|
if (ecs->ws.kind != TARGET_WAITKIND_EXITED
|
if (ecs->ws.kind != TARGET_WAITKIND_EXITED
|
&& ecs->ws.kind != TARGET_WAITKIND_SIGNALLED
|
&& ecs->ws.kind != TARGET_WAITKIND_SIGNALLED
|
&& ecs->new_thread_event)
|
&& ecs->new_thread_event)
|
{
|
{
|
add_thread (ecs->pid);
|
add_thread (ecs->pid);
|
|
|
#ifdef UI_OUT
|
#ifdef UI_OUT
|
ui_out_text (uiout, "[New ");
|
ui_out_text (uiout, "[New ");
|
ui_out_text (uiout, target_pid_or_tid_to_str (ecs->pid));
|
ui_out_text (uiout, target_pid_or_tid_to_str (ecs->pid));
|
ui_out_text (uiout, "]\n");
|
ui_out_text (uiout, "]\n");
|
#else
|
#else
|
printf_filtered ("[New %s]\n", target_pid_or_tid_to_str (ecs->pid));
|
printf_filtered ("[New %s]\n", target_pid_or_tid_to_str (ecs->pid));
|
#endif
|
#endif
|
|
|
#if 0
|
#if 0
|
/* NOTE: This block is ONLY meant to be invoked in case of a
|
/* NOTE: This block is ONLY meant to be invoked in case of a
|
"thread creation event"! If it is invoked for any other
|
"thread creation event"! If it is invoked for any other
|
sort of event (such as a new thread landing on a breakpoint),
|
sort of event (such as a new thread landing on a breakpoint),
|
the event will be discarded, which is almost certainly
|
the event will be discarded, which is almost certainly
|
a bad thing!
|
a bad thing!
|
|
|
To avoid this, the low-level module (eg. target_wait)
|
To avoid this, the low-level module (eg. target_wait)
|
should call in_thread_list and add_thread, so that the
|
should call in_thread_list and add_thread, so that the
|
new thread is known by the time we get here. */
|
new thread is known by the time we get here. */
|
|
|
/* We may want to consider not doing a resume here in order
|
/* We may want to consider not doing a resume here in order
|
to give the user a chance to play with the new thread.
|
to give the user a chance to play with the new thread.
|
It might be good to make that a user-settable option. */
|
It might be good to make that a user-settable option. */
|
|
|
/* At this point, all threads are stopped (happens
|
/* At this point, all threads are stopped (happens
|
automatically in either the OS or the native code).
|
automatically in either the OS or the native code).
|
Therefore we need to continue all threads in order to
|
Therefore we need to continue all threads in order to
|
make progress. */
|
make progress. */
|
|
|
target_resume (-1, 0, TARGET_SIGNAL_0);
|
target_resume (-1, 0, TARGET_SIGNAL_0);
|
prepare_to_wait (ecs);
|
prepare_to_wait (ecs);
|
return;
|
return;
|
#endif
|
#endif
|
}
|
}
|
|
|
switch (ecs->ws.kind)
|
switch (ecs->ws.kind)
|
{
|
{
|
case TARGET_WAITKIND_LOADED:
|
case TARGET_WAITKIND_LOADED:
|
/* Ignore gracefully during startup of the inferior, as it
|
/* Ignore gracefully during startup of the inferior, as it
|
might be the shell which has just loaded some objects,
|
might be the shell which has just loaded some objects,
|
otherwise add the symbols for the newly loaded objects. */
|
otherwise add the symbols for the newly loaded objects. */
|
#ifdef SOLIB_ADD
|
#ifdef SOLIB_ADD
|
if (!stop_soon_quietly)
|
if (!stop_soon_quietly)
|
{
|
{
|
/* Remove breakpoints, SOLIB_ADD might adjust
|
/* Remove breakpoints, SOLIB_ADD might adjust
|
breakpoint addresses via breakpoint_re_set. */
|
breakpoint addresses via breakpoint_re_set. */
|
if (breakpoints_inserted)
|
if (breakpoints_inserted)
|
remove_breakpoints ();
|
remove_breakpoints ();
|
|
|
/* Check for any newly added shared libraries if we're
|
/* Check for any newly added shared libraries if we're
|
supposed to be adding them automatically. */
|
supposed to be adding them automatically. */
|
if (auto_solib_add)
|
if (auto_solib_add)
|
{
|
{
|
/* Switch terminal for any messages produced by
|
/* Switch terminal for any messages produced by
|
breakpoint_re_set. */
|
breakpoint_re_set. */
|
target_terminal_ours_for_output ();
|
target_terminal_ours_for_output ();
|
SOLIB_ADD (NULL, 0, NULL);
|
SOLIB_ADD (NULL, 0, NULL);
|
target_terminal_inferior ();
|
target_terminal_inferior ();
|
}
|
}
|
|
|
/* Reinsert breakpoints and continue. */
|
/* Reinsert breakpoints and continue. */
|
if (breakpoints_inserted)
|
if (breakpoints_inserted)
|
insert_breakpoints ();
|
insert_breakpoints ();
|
}
|
}
|
#endif
|
#endif
|
resume (0, TARGET_SIGNAL_0);
|
resume (0, TARGET_SIGNAL_0);
|
prepare_to_wait (ecs);
|
prepare_to_wait (ecs);
|
return;
|
return;
|
|
|
case TARGET_WAITKIND_SPURIOUS:
|
case TARGET_WAITKIND_SPURIOUS:
|
resume (0, TARGET_SIGNAL_0);
|
resume (0, TARGET_SIGNAL_0);
|
prepare_to_wait (ecs);
|
prepare_to_wait (ecs);
|
return;
|
return;
|
|
|
case TARGET_WAITKIND_EXITED:
|
case TARGET_WAITKIND_EXITED:
|
target_terminal_ours (); /* Must do this before mourn anyway */
|
target_terminal_ours (); /* Must do this before mourn anyway */
|
print_stop_reason (EXITED, ecs->ws.value.integer);
|
print_stop_reason (EXITED, ecs->ws.value.integer);
|
|
|
/* Record the exit code in the convenience variable $_exitcode, so
|
/* Record the exit code in the convenience variable $_exitcode, so
|
that the user can inspect this again later. */
|
that the user can inspect this again later. */
|
set_internalvar (lookup_internalvar ("_exitcode"),
|
set_internalvar (lookup_internalvar ("_exitcode"),
|
value_from_longest (builtin_type_int,
|
value_from_longest (builtin_type_int,
|
(LONGEST) ecs->ws.value.integer));
|
(LONGEST) ecs->ws.value.integer));
|
gdb_flush (gdb_stdout);
|
gdb_flush (gdb_stdout);
|
target_mourn_inferior ();
|
target_mourn_inferior ();
|
singlestep_breakpoints_inserted_p = 0; /*SOFTWARE_SINGLE_STEP_P */
|
singlestep_breakpoints_inserted_p = 0; /*SOFTWARE_SINGLE_STEP_P */
|
stop_print_frame = 0;
|
stop_print_frame = 0;
|
stop_stepping (ecs);
|
stop_stepping (ecs);
|
return;
|
return;
|
|
|
case TARGET_WAITKIND_SIGNALLED:
|
case TARGET_WAITKIND_SIGNALLED:
|
stop_print_frame = 0;
|
stop_print_frame = 0;
|
stop_signal = ecs->ws.value.sig;
|
stop_signal = ecs->ws.value.sig;
|
target_terminal_ours (); /* Must do this before mourn anyway */
|
target_terminal_ours (); /* Must do this before mourn anyway */
|
|
|
/* Note: By definition of TARGET_WAITKIND_SIGNALLED, we shouldn't
|
/* Note: By definition of TARGET_WAITKIND_SIGNALLED, we shouldn't
|
reach here unless the inferior is dead. However, for years
|
reach here unless the inferior is dead. However, for years
|
target_kill() was called here, which hints that fatal signals aren't
|
target_kill() was called here, which hints that fatal signals aren't
|
really fatal on some systems. If that's true, then some changes
|
really fatal on some systems. If that's true, then some changes
|
may be needed. */
|
may be needed. */
|
target_mourn_inferior ();
|
target_mourn_inferior ();
|
|
|
print_stop_reason (SIGNAL_EXITED, stop_signal);
|
print_stop_reason (SIGNAL_EXITED, stop_signal);
|
singlestep_breakpoints_inserted_p = 0; /*SOFTWARE_SINGLE_STEP_P */
|
singlestep_breakpoints_inserted_p = 0; /*SOFTWARE_SINGLE_STEP_P */
|
stop_stepping (ecs);
|
stop_stepping (ecs);
|
return;
|
return;
|
|
|
/* The following are the only cases in which we keep going;
|
/* The following are the only cases in which we keep going;
|
the above cases end in a continue or goto. */
|
the above cases end in a continue or goto. */
|
case TARGET_WAITKIND_FORKED:
|
case TARGET_WAITKIND_FORKED:
|
stop_signal = TARGET_SIGNAL_TRAP;
|
stop_signal = TARGET_SIGNAL_TRAP;
|
pending_follow.kind = ecs->ws.kind;
|
pending_follow.kind = ecs->ws.kind;
|
|
|
/* Ignore fork events reported for the parent; we're only
|
/* Ignore fork events reported for the parent; we're only
|
interested in reacting to forks of the child. Note that
|
interested in reacting to forks of the child. Note that
|
we expect the child's fork event to be available if we
|
we expect the child's fork event to be available if we
|
waited for it now. */
|
waited for it now. */
|
if (inferior_pid == ecs->pid)
|
if (inferior_pid == ecs->pid)
|
{
|
{
|
pending_follow.fork_event.saw_parent_fork = 1;
|
pending_follow.fork_event.saw_parent_fork = 1;
|
pending_follow.fork_event.parent_pid = ecs->pid;
|
pending_follow.fork_event.parent_pid = ecs->pid;
|
pending_follow.fork_event.child_pid = ecs->ws.value.related_pid;
|
pending_follow.fork_event.child_pid = ecs->ws.value.related_pid;
|
prepare_to_wait (ecs);
|
prepare_to_wait (ecs);
|
return;
|
return;
|
}
|
}
|
else
|
else
|
{
|
{
|
pending_follow.fork_event.saw_child_fork = 1;
|
pending_follow.fork_event.saw_child_fork = 1;
|
pending_follow.fork_event.child_pid = ecs->pid;
|
pending_follow.fork_event.child_pid = ecs->pid;
|
pending_follow.fork_event.parent_pid = ecs->ws.value.related_pid;
|
pending_follow.fork_event.parent_pid = ecs->ws.value.related_pid;
|
}
|
}
|
|
|
stop_pc = read_pc_pid (ecs->pid);
|
stop_pc = read_pc_pid (ecs->pid);
|
ecs->saved_inferior_pid = inferior_pid;
|
ecs->saved_inferior_pid = inferior_pid;
|
inferior_pid = ecs->pid;
|
inferior_pid = ecs->pid;
|
stop_bpstat = bpstat_stop_status (&stop_pc, currently_stepping (ecs));
|
stop_bpstat = bpstat_stop_status (&stop_pc, currently_stepping (ecs));
|
ecs->random_signal = !bpstat_explains_signal (stop_bpstat);
|
ecs->random_signal = !bpstat_explains_signal (stop_bpstat);
|
inferior_pid = ecs->saved_inferior_pid;
|
inferior_pid = ecs->saved_inferior_pid;
|
goto process_event_stop_test;
|
goto process_event_stop_test;
|
|
|
/* If this a platform which doesn't allow a debugger to touch a
|
/* If this a platform which doesn't allow a debugger to touch a
|
vfork'd inferior until after it exec's, then we'd best keep
|
vfork'd inferior until after it exec's, then we'd best keep
|
our fingers entirely off the inferior, other than continuing
|
our fingers entirely off the inferior, other than continuing
|
it. This has the unfortunate side-effect that catchpoints
|
it. This has the unfortunate side-effect that catchpoints
|
of vforks will be ignored. But since the platform doesn't
|
of vforks will be ignored. But since the platform doesn't
|
allow the inferior be touched at vfork time, there's really
|
allow the inferior be touched at vfork time, there's really
|
little choice. */
|
little choice. */
|
case TARGET_WAITKIND_VFORKED:
|
case TARGET_WAITKIND_VFORKED:
|
stop_signal = TARGET_SIGNAL_TRAP;
|
stop_signal = TARGET_SIGNAL_TRAP;
|
pending_follow.kind = ecs->ws.kind;
|
pending_follow.kind = ecs->ws.kind;
|
|
|
/* Is this a vfork of the parent? If so, then give any
|
/* Is this a vfork of the parent? If so, then give any
|
vfork catchpoints a chance to trigger now. (It's
|
vfork catchpoints a chance to trigger now. (It's
|
dangerous to do so if the child canot be touched until
|
dangerous to do so if the child canot be touched until
|
it execs, and the child has not yet exec'd. We probably
|
it execs, and the child has not yet exec'd. We probably
|
should warn the user to that effect when the catchpoint
|
should warn the user to that effect when the catchpoint
|
triggers...) */
|
triggers...) */
|
if (ecs->pid == inferior_pid)
|
if (ecs->pid == inferior_pid)
|
{
|
{
|
pending_follow.fork_event.saw_parent_fork = 1;
|
pending_follow.fork_event.saw_parent_fork = 1;
|
pending_follow.fork_event.parent_pid = ecs->pid;
|
pending_follow.fork_event.parent_pid = ecs->pid;
|
pending_follow.fork_event.child_pid = ecs->ws.value.related_pid;
|
pending_follow.fork_event.child_pid = ecs->ws.value.related_pid;
|
}
|
}
|
|
|
/* If we've seen the child's vfork event but cannot really touch
|
/* If we've seen the child's vfork event but cannot really touch
|
the child until it execs, then we must continue the child now.
|
the child until it execs, then we must continue the child now.
|
Else, give any vfork catchpoints a chance to trigger now. */
|
Else, give any vfork catchpoints a chance to trigger now. */
|
else
|
else
|
{
|
{
|
pending_follow.fork_event.saw_child_fork = 1;
|
pending_follow.fork_event.saw_child_fork = 1;
|
pending_follow.fork_event.child_pid = ecs->pid;
|
pending_follow.fork_event.child_pid = ecs->pid;
|
pending_follow.fork_event.parent_pid = ecs->ws.value.related_pid;
|
pending_follow.fork_event.parent_pid = ecs->ws.value.related_pid;
|
target_post_startup_inferior (pending_follow.fork_event.child_pid);
|
target_post_startup_inferior (pending_follow.fork_event.child_pid);
|
follow_vfork_when_exec = !target_can_follow_vfork_prior_to_exec ();
|
follow_vfork_when_exec = !target_can_follow_vfork_prior_to_exec ();
|
if (follow_vfork_when_exec)
|
if (follow_vfork_when_exec)
|
{
|
{
|
target_resume (ecs->pid, 0, TARGET_SIGNAL_0);
|
target_resume (ecs->pid, 0, TARGET_SIGNAL_0);
|
prepare_to_wait (ecs);
|
prepare_to_wait (ecs);
|
return;
|
return;
|
}
|
}
|
}
|
}
|
|
|
stop_pc = read_pc ();
|
stop_pc = read_pc ();
|
stop_bpstat = bpstat_stop_status (&stop_pc, currently_stepping (ecs));
|
stop_bpstat = bpstat_stop_status (&stop_pc, currently_stepping (ecs));
|
ecs->random_signal = !bpstat_explains_signal (stop_bpstat);
|
ecs->random_signal = !bpstat_explains_signal (stop_bpstat);
|
goto process_event_stop_test;
|
goto process_event_stop_test;
|
|
|
case TARGET_WAITKIND_EXECD:
|
case TARGET_WAITKIND_EXECD:
|
stop_signal = TARGET_SIGNAL_TRAP;
|
stop_signal = TARGET_SIGNAL_TRAP;
|
|
|
/* Is this a target which reports multiple exec events per actual
|
/* Is this a target which reports multiple exec events per actual
|
call to exec()? (HP-UX using ptrace does, for example.) If so,
|
call to exec()? (HP-UX using ptrace does, for example.) If so,
|
ignore all but the last one. Just resume the exec'r, and wait
|
ignore all but the last one. Just resume the exec'r, and wait
|
for the next exec event. */
|
for the next exec event. */
|
if (inferior_ignoring_leading_exec_events)
|
if (inferior_ignoring_leading_exec_events)
|
{
|
{
|
inferior_ignoring_leading_exec_events--;
|
inferior_ignoring_leading_exec_events--;
|
if (pending_follow.kind == TARGET_WAITKIND_VFORKED)
|
if (pending_follow.kind == TARGET_WAITKIND_VFORKED)
|
ENSURE_VFORKING_PARENT_REMAINS_STOPPED (pending_follow.fork_event.parent_pid);
|
ENSURE_VFORKING_PARENT_REMAINS_STOPPED (pending_follow.fork_event.parent_pid);
|
target_resume (ecs->pid, 0, TARGET_SIGNAL_0);
|
target_resume (ecs->pid, 0, TARGET_SIGNAL_0);
|
prepare_to_wait (ecs);
|
prepare_to_wait (ecs);
|
return;
|
return;
|
}
|
}
|
inferior_ignoring_leading_exec_events =
|
inferior_ignoring_leading_exec_events =
|
target_reported_exec_events_per_exec_call () - 1;
|
target_reported_exec_events_per_exec_call () - 1;
|
|
|
pending_follow.execd_pathname =
|
pending_follow.execd_pathname =
|
savestring (ecs->ws.value.execd_pathname,
|
savestring (ecs->ws.value.execd_pathname,
|
strlen (ecs->ws.value.execd_pathname));
|
strlen (ecs->ws.value.execd_pathname));
|
|
|
/* Did inferior_pid exec, or did a (possibly not-yet-followed)
|
/* Did inferior_pid exec, or did a (possibly not-yet-followed)
|
child of a vfork exec?
|
child of a vfork exec?
|
|
|
??rehrauer: This is unabashedly an HP-UX specific thing. On
|
??rehrauer: This is unabashedly an HP-UX specific thing. On
|
HP-UX, events associated with a vforking inferior come in
|
HP-UX, events associated with a vforking inferior come in
|
threes: a vfork event for the child (always first), followed
|
threes: a vfork event for the child (always first), followed
|
a vfork event for the parent and an exec event for the child.
|
a vfork event for the parent and an exec event for the child.
|
The latter two can come in either order.
|
The latter two can come in either order.
|
|
|
If we get the parent vfork event first, life's good: We follow
|
If we get the parent vfork event first, life's good: We follow
|
either the parent or child, and then the child's exec event is
|
either the parent or child, and then the child's exec event is
|
a "don't care".
|
a "don't care".
|
|
|
But if we get the child's exec event first, then we delay
|
But if we get the child's exec event first, then we delay
|
responding to it until we handle the parent's vfork. Because,
|
responding to it until we handle the parent's vfork. Because,
|
otherwise we can't satisfy a "catch vfork". */
|
otherwise we can't satisfy a "catch vfork". */
|
if (pending_follow.kind == TARGET_WAITKIND_VFORKED)
|
if (pending_follow.kind == TARGET_WAITKIND_VFORKED)
|
{
|
{
|
pending_follow.fork_event.saw_child_exec = 1;
|
pending_follow.fork_event.saw_child_exec = 1;
|
|
|
/* On some targets, the child must be resumed before
|
/* On some targets, the child must be resumed before
|
the parent vfork event is delivered. A single-step
|
the parent vfork event is delivered. A single-step
|
suffices. */
|
suffices. */
|
if (RESUME_EXECD_VFORKING_CHILD_TO_GET_PARENT_VFORK ())
|
if (RESUME_EXECD_VFORKING_CHILD_TO_GET_PARENT_VFORK ())
|
target_resume (ecs->pid, 1, TARGET_SIGNAL_0);
|
target_resume (ecs->pid, 1, TARGET_SIGNAL_0);
|
/* We expect the parent vfork event to be available now. */
|
/* We expect the parent vfork event to be available now. */
|
prepare_to_wait (ecs);
|
prepare_to_wait (ecs);
|
return;
|
return;
|
}
|
}
|
|
|
/* This causes the eventpoints and symbol table to be reset. Must
|
/* This causes the eventpoints and symbol table to be reset. Must
|
do this now, before trying to determine whether to stop. */
|
do this now, before trying to determine whether to stop. */
|
follow_exec (inferior_pid, pending_follow.execd_pathname);
|
follow_exec (inferior_pid, pending_follow.execd_pathname);
|
free (pending_follow.execd_pathname);
|
free (pending_follow.execd_pathname);
|
|
|
stop_pc = read_pc_pid (ecs->pid);
|
stop_pc = read_pc_pid (ecs->pid);
|
ecs->saved_inferior_pid = inferior_pid;
|
ecs->saved_inferior_pid = inferior_pid;
|
inferior_pid = ecs->pid;
|
inferior_pid = ecs->pid;
|
stop_bpstat = bpstat_stop_status (&stop_pc, currently_stepping (ecs));
|
stop_bpstat = bpstat_stop_status (&stop_pc, currently_stepping (ecs));
|
ecs->random_signal = !bpstat_explains_signal (stop_bpstat);
|
ecs->random_signal = !bpstat_explains_signal (stop_bpstat);
|
inferior_pid = ecs->saved_inferior_pid;
|
inferior_pid = ecs->saved_inferior_pid;
|
goto process_event_stop_test;
|
goto process_event_stop_test;
|
|
|
/* These syscall events are returned on HP-UX, as part of its
|
/* These syscall events are returned on HP-UX, as part of its
|
implementation of page-protection-based "hardware" watchpoints.
|
implementation of page-protection-based "hardware" watchpoints.
|
HP-UX has unfortunate interactions between page-protections and
|
HP-UX has unfortunate interactions between page-protections and
|
some system calls. Our solution is to disable hardware watches
|
some system calls. Our solution is to disable hardware watches
|
when a system call is entered, and reenable them when the syscall
|
when a system call is entered, and reenable them when the syscall
|
completes. The downside of this is that we may miss the precise
|
completes. The downside of this is that we may miss the precise
|
point at which a watched piece of memory is modified. "Oh well."
|
point at which a watched piece of memory is modified. "Oh well."
|
|
|
Note that we may have multiple threads running, which may each
|
Note that we may have multiple threads running, which may each
|
enter syscalls at roughly the same time. Since we don't have a
|
enter syscalls at roughly the same time. Since we don't have a
|
good notion currently of whether a watched piece of memory is
|
good notion currently of whether a watched piece of memory is
|
thread-private, we'd best not have any page-protections active
|
thread-private, we'd best not have any page-protections active
|
when any thread is in a syscall. Thus, we only want to reenable
|
when any thread is in a syscall. Thus, we only want to reenable
|
hardware watches when no threads are in a syscall.
|
hardware watches when no threads are in a syscall.
|
|
|
Also, be careful not to try to gather much state about a thread
|
Also, be careful not to try to gather much state about a thread
|
that's in a syscall. It's frequently a losing proposition. */
|
that's in a syscall. It's frequently a losing proposition. */
|
case TARGET_WAITKIND_SYSCALL_ENTRY:
|
case TARGET_WAITKIND_SYSCALL_ENTRY:
|
number_of_threads_in_syscalls++;
|
number_of_threads_in_syscalls++;
|
if (number_of_threads_in_syscalls == 1)
|
if (number_of_threads_in_syscalls == 1)
|
{
|
{
|
TARGET_DISABLE_HW_WATCHPOINTS (inferior_pid);
|
TARGET_DISABLE_HW_WATCHPOINTS (inferior_pid);
|
}
|
}
|
resume (0, TARGET_SIGNAL_0);
|
resume (0, TARGET_SIGNAL_0);
|
prepare_to_wait (ecs);
|
prepare_to_wait (ecs);
|
return;
|
return;
|
|
|
/* Before examining the threads further, step this thread to
|
/* Before examining the threads further, step this thread to
|
get it entirely out of the syscall. (We get notice of the
|
get it entirely out of the syscall. (We get notice of the
|
event when the thread is just on the verge of exiting a
|
event when the thread is just on the verge of exiting a
|
syscall. Stepping one instruction seems to get it back
|
syscall. Stepping one instruction seems to get it back
|
into user code.)
|
into user code.)
|
|
|
Note that although the logical place to reenable h/w watches
|
Note that although the logical place to reenable h/w watches
|
is here, we cannot. We cannot reenable them before stepping
|
is here, we cannot. We cannot reenable them before stepping
|
the thread (this causes the next wait on the thread to hang).
|
the thread (this causes the next wait on the thread to hang).
|
|
|
Nor can we enable them after stepping until we've done a wait.
|
Nor can we enable them after stepping until we've done a wait.
|
Thus, we simply set the flag ecs->enable_hw_watchpoints_after_wait
|
Thus, we simply set the flag ecs->enable_hw_watchpoints_after_wait
|
here, which will be serviced immediately after the target
|
here, which will be serviced immediately after the target
|
is waited on. */
|
is waited on. */
|
case TARGET_WAITKIND_SYSCALL_RETURN:
|
case TARGET_WAITKIND_SYSCALL_RETURN:
|
target_resume (ecs->pid, 1, TARGET_SIGNAL_0);
|
target_resume (ecs->pid, 1, TARGET_SIGNAL_0);
|
|
|
if (number_of_threads_in_syscalls > 0)
|
if (number_of_threads_in_syscalls > 0)
|
{
|
{
|
number_of_threads_in_syscalls--;
|
number_of_threads_in_syscalls--;
|
ecs->enable_hw_watchpoints_after_wait =
|
ecs->enable_hw_watchpoints_after_wait =
|
(number_of_threads_in_syscalls == 0);
|
(number_of_threads_in_syscalls == 0);
|
}
|
}
|
prepare_to_wait (ecs);
|
prepare_to_wait (ecs);
|
return;
|
return;
|
|
|
case TARGET_WAITKIND_STOPPED:
|
case TARGET_WAITKIND_STOPPED:
|
stop_signal = ecs->ws.value.sig;
|
stop_signal = ecs->ws.value.sig;
|
break;
|
break;
|
|
|
/* We had an event in the inferior, but we are not interested
|
/* We had an event in the inferior, but we are not interested
|
in handling it at this level. The lower layers have already
|
in handling it at this level. The lower layers have already
|
done what needs to be done, if anything. This case can
|
done what needs to be done, if anything. This case can
|
occur only when the target is async or extended-async. One
|
occur only when the target is async or extended-async. One
|
of the circumstamces for this to happen is when the
|
of the circumstamces for this to happen is when the
|
inferior produces output for the console. The inferior has
|
inferior produces output for the console. The inferior has
|
not stopped, and we are ignoring the event. */
|
not stopped, and we are ignoring the event. */
|
case TARGET_WAITKIND_IGNORE:
|
case TARGET_WAITKIND_IGNORE:
|
ecs->wait_some_more = 1;
|
ecs->wait_some_more = 1;
|
return;
|
return;
|
}
|
}
|
|
|
/* We may want to consider not doing a resume here in order to give
|
/* We may want to consider not doing a resume here in order to give
|
the user a chance to play with the new thread. It might be good
|
the user a chance to play with the new thread. It might be good
|
to make that a user-settable option. */
|
to make that a user-settable option. */
|
|
|
/* At this point, all threads are stopped (happens automatically in
|
/* At this point, all threads are stopped (happens automatically in
|
either the OS or the native code). Therefore we need to continue
|
either the OS or the native code). Therefore we need to continue
|
all threads in order to make progress. */
|
all threads in order to make progress. */
|
if (ecs->new_thread_event)
|
if (ecs->new_thread_event)
|
{
|
{
|
target_resume (-1, 0, TARGET_SIGNAL_0);
|
target_resume (-1, 0, TARGET_SIGNAL_0);
|
prepare_to_wait (ecs);
|
prepare_to_wait (ecs);
|
return;
|
return;
|
}
|
}
|
|
|
stop_pc = read_pc_pid (ecs->pid);
|
stop_pc = read_pc_pid (ecs->pid);
|
|
|
/* See if a thread hit a thread-specific breakpoint that was meant for
|
/* See if a thread hit a thread-specific breakpoint that was meant for
|
another thread. If so, then step that thread past the breakpoint,
|
another thread. If so, then step that thread past the breakpoint,
|
and continue it. */
|
and continue it. */
|
|
|
if (stop_signal == TARGET_SIGNAL_TRAP)
|
if (stop_signal == TARGET_SIGNAL_TRAP)
|
{
|
{
|
if (SOFTWARE_SINGLE_STEP_P && singlestep_breakpoints_inserted_p)
|
if (SOFTWARE_SINGLE_STEP_P && singlestep_breakpoints_inserted_p)
|
ecs->random_signal = 0;
|
ecs->random_signal = 0;
|
else if (breakpoints_inserted
|
else if (breakpoints_inserted
|
&& breakpoint_here_p (stop_pc - DECR_PC_AFTER_BREAK))
|
&& breakpoint_here_p (stop_pc - DECR_PC_AFTER_BREAK))
|
{
|
{
|
ecs->random_signal = 0;
|
ecs->random_signal = 0;
|
if (!breakpoint_thread_match (stop_pc - DECR_PC_AFTER_BREAK,
|
if (!breakpoint_thread_match (stop_pc - DECR_PC_AFTER_BREAK,
|
ecs->pid))
|
ecs->pid))
|
{
|
{
|
int remove_status;
|
int remove_status;
|
|
|
/* Saw a breakpoint, but it was hit by the wrong thread.
|
/* Saw a breakpoint, but it was hit by the wrong thread.
|
Just continue. */
|
Just continue. */
|
write_pc_pid (stop_pc - DECR_PC_AFTER_BREAK, ecs->pid);
|
write_pc_pid (stop_pc - DECR_PC_AFTER_BREAK, ecs->pid);
|
|
|
remove_status = remove_breakpoints ();
|
remove_status = remove_breakpoints ();
|
/* Did we fail to remove breakpoints? If so, try
|
/* Did we fail to remove breakpoints? If so, try
|
to set the PC past the bp. (There's at least
|
to set the PC past the bp. (There's at least
|
one situation in which we can fail to remove
|
one situation in which we can fail to remove
|
the bp's: On HP-UX's that use ttrace, we can't
|
the bp's: On HP-UX's that use ttrace, we can't
|
change the address space of a vforking child
|
change the address space of a vforking child
|
process until the child exits (well, okay, not
|
process until the child exits (well, okay, not
|
then either :-) or execs. */
|
then either :-) or execs. */
|
if (remove_status != 0)
|
if (remove_status != 0)
|
{
|
{
|
write_pc_pid (stop_pc - DECR_PC_AFTER_BREAK + 4, ecs->pid);
|
write_pc_pid (stop_pc - DECR_PC_AFTER_BREAK + 4, ecs->pid);
|
}
|
}
|
else
|
else
|
{ /* Single step */
|
{ /* Single step */
|
target_resume (ecs->pid, 1, TARGET_SIGNAL_0);
|
target_resume (ecs->pid, 1, TARGET_SIGNAL_0);
|
/* FIXME: What if a signal arrives instead of the
|
/* FIXME: What if a signal arrives instead of the
|
single-step happening? */
|
single-step happening? */
|
|
|
ecs->waiton_pid = ecs->pid;
|
ecs->waiton_pid = ecs->pid;
|
ecs->wp = &(ecs->ws);
|
ecs->wp = &(ecs->ws);
|
ecs->infwait_state = infwait_thread_hop_state;
|
ecs->infwait_state = infwait_thread_hop_state;
|
prepare_to_wait (ecs);
|
prepare_to_wait (ecs);
|
return;
|
return;
|
}
|
}
|
|
|
/* We need to restart all the threads now,
|
/* We need to restart all the threads now,
|
* unles we're running in scheduler-locked mode.
|
* unles we're running in scheduler-locked mode.
|
* FIXME: shouldn't we look at currently_stepping ()?
|
* FIXME: shouldn't we look at currently_stepping ()?
|
*/
|
*/
|
if (scheduler_mode == schedlock_on)
|
if (scheduler_mode == schedlock_on)
|
target_resume (ecs->pid, 0, TARGET_SIGNAL_0);
|
target_resume (ecs->pid, 0, TARGET_SIGNAL_0);
|
else
|
else
|
target_resume (-1, 0, TARGET_SIGNAL_0);
|
target_resume (-1, 0, TARGET_SIGNAL_0);
|
prepare_to_wait (ecs);
|
prepare_to_wait (ecs);
|
return;
|
return;
|
}
|
}
|
else
|
else
|
{
|
{
|
/* This breakpoint matches--either it is the right
|
/* This breakpoint matches--either it is the right
|
thread or it's a generic breakpoint for all threads.
|
thread or it's a generic breakpoint for all threads.
|
Remember that we'll need to step just _this_ thread
|
Remember that we'll need to step just _this_ thread
|
on any following user continuation! */
|
on any following user continuation! */
|
thread_step_needed = 1;
|
thread_step_needed = 1;
|
}
|
}
|
}
|
}
|
}
|
}
|
else
|
else
|
ecs->random_signal = 1;
|
ecs->random_signal = 1;
|
|
|
/* See if something interesting happened to the non-current thread. If
|
/* See if something interesting happened to the non-current thread. If
|
so, then switch to that thread, and eventually give control back to
|
so, then switch to that thread, and eventually give control back to
|
the user.
|
the user.
|
|
|
Note that if there's any kind of pending follow (i.e., of a fork,
|
Note that if there's any kind of pending follow (i.e., of a fork,
|
vfork or exec), we don't want to do this now. Rather, we'll let
|
vfork or exec), we don't want to do this now. Rather, we'll let
|
the next resume handle it. */
|
the next resume handle it. */
|
if ((ecs->pid != inferior_pid) &&
|
if ((ecs->pid != inferior_pid) &&
|
(pending_follow.kind == TARGET_WAITKIND_SPURIOUS))
|
(pending_follow.kind == TARGET_WAITKIND_SPURIOUS))
|
{
|
{
|
int printed = 0;
|
int printed = 0;
|
|
|
/* If it's a random signal for a non-current thread, notify user
|
/* If it's a random signal for a non-current thread, notify user
|
if he's expressed an interest. */
|
if he's expressed an interest. */
|
if (ecs->random_signal
|
if (ecs->random_signal
|
&& signal_print[stop_signal])
|
&& signal_print[stop_signal])
|
{
|
{
|
/* ??rehrauer: I don't understand the rationale for this code. If the
|
/* ??rehrauer: I don't understand the rationale for this code. If the
|
inferior will stop as a result of this signal, then the act of handling
|
inferior will stop as a result of this signal, then the act of handling
|
the stop ought to print a message that's couches the stoppage in user
|
the stop ought to print a message that's couches the stoppage in user
|
terms, e.g., "Stopped for breakpoint/watchpoint". If the inferior
|
terms, e.g., "Stopped for breakpoint/watchpoint". If the inferior
|
won't stop as a result of the signal -- i.e., if the signal is merely
|
won't stop as a result of the signal -- i.e., if the signal is merely
|
a side-effect of something GDB's doing "under the covers" for the
|
a side-effect of something GDB's doing "under the covers" for the
|
user, such as stepping threads over a breakpoint they shouldn't stop
|
user, such as stepping threads over a breakpoint they shouldn't stop
|
for -- then the message seems to be a serious annoyance at best.
|
for -- then the message seems to be a serious annoyance at best.
|
|
|
For now, remove the message altogether. */
|
For now, remove the message altogether. */
|
#if 0
|
#if 0
|
printed = 1;
|
printed = 1;
|
target_terminal_ours_for_output ();
|
target_terminal_ours_for_output ();
|
printf_filtered ("\nProgram received signal %s, %s.\n",
|
printf_filtered ("\nProgram received signal %s, %s.\n",
|
target_signal_to_name (stop_signal),
|
target_signal_to_name (stop_signal),
|
target_signal_to_string (stop_signal));
|
target_signal_to_string (stop_signal));
|
gdb_flush (gdb_stdout);
|
gdb_flush (gdb_stdout);
|
#endif
|
#endif
|
}
|
}
|
|
|
/* If it's not SIGTRAP and not a signal we want to stop for, then
|
/* If it's not SIGTRAP and not a signal we want to stop for, then
|
continue the thread. */
|
continue the thread. */
|
|
|
if (stop_signal != TARGET_SIGNAL_TRAP
|
if (stop_signal != TARGET_SIGNAL_TRAP
|
&& !signal_stop[stop_signal])
|
&& !signal_stop[stop_signal])
|
{
|
{
|
if (printed)
|
if (printed)
|
target_terminal_inferior ();
|
target_terminal_inferior ();
|
|
|
/* Clear the signal if it should not be passed. */
|
/* Clear the signal if it should not be passed. */
|
if (signal_program[stop_signal] == 0)
|
if (signal_program[stop_signal] == 0)
|
stop_signal = TARGET_SIGNAL_0;
|
stop_signal = TARGET_SIGNAL_0;
|
|
|
target_resume (ecs->pid, 0, stop_signal);
|
target_resume (ecs->pid, 0, stop_signal);
|
prepare_to_wait (ecs);
|
prepare_to_wait (ecs);
|
return;
|
return;
|
}
|
}
|
|
|
/* It's a SIGTRAP or a signal we're interested in. Switch threads,
|
/* It's a SIGTRAP or a signal we're interested in. Switch threads,
|
and fall into the rest of wait_for_inferior(). */
|
and fall into the rest of wait_for_inferior(). */
|
|
|
/* Caution: it may happen that the new thread (or the old one!)
|
/* Caution: it may happen that the new thread (or the old one!)
|
is not in the thread list. In this case we must not attempt
|
is not in the thread list. In this case we must not attempt
|
to "switch context", or we run the risk that our context may
|
to "switch context", or we run the risk that our context may
|
be lost. This may happen as a result of the target module
|
be lost. This may happen as a result of the target module
|
mishandling thread creation. */
|
mishandling thread creation. */
|
|
|
if (in_thread_list (inferior_pid) && in_thread_list (ecs->pid))
|
if (in_thread_list (inferior_pid) && in_thread_list (ecs->pid))
|
{ /* Perform infrun state context switch: */
|
{ /* Perform infrun state context switch: */
|
/* Save infrun state for the old thread. */
|
/* Save infrun state for the old thread. */
|
save_infrun_state (inferior_pid, prev_pc,
|
save_infrun_state (inferior_pid, prev_pc,
|
prev_func_start, prev_func_name,
|
prev_func_start, prev_func_name,
|
trap_expected, step_resume_breakpoint,
|
trap_expected, step_resume_breakpoint,
|
through_sigtramp_breakpoint,
|
through_sigtramp_breakpoint,
|
step_range_start, step_range_end,
|
step_range_start, step_range_end,
|
step_frame_address, ecs->handling_longjmp,
|
step_frame_address, ecs->handling_longjmp,
|
ecs->another_trap,
|
ecs->another_trap,
|
ecs->stepping_through_solib_after_catch,
|
ecs->stepping_through_solib_after_catch,
|
ecs->stepping_through_solib_catchpoints,
|
ecs->stepping_through_solib_catchpoints,
|
ecs->stepping_through_sigtramp);
|
ecs->stepping_through_sigtramp);
|
|
|
/* Load infrun state for the new thread. */
|
/* Load infrun state for the new thread. */
|
load_infrun_state (ecs->pid, &prev_pc,
|
load_infrun_state (ecs->pid, &prev_pc,
|
&prev_func_start, &prev_func_name,
|
&prev_func_start, &prev_func_name,
|
&trap_expected, &step_resume_breakpoint,
|
&trap_expected, &step_resume_breakpoint,
|
&through_sigtramp_breakpoint,
|
&through_sigtramp_breakpoint,
|
&step_range_start, &step_range_end,
|
&step_range_start, &step_range_end,
|
&step_frame_address, &ecs->handling_longjmp,
|
&step_frame_address, &ecs->handling_longjmp,
|
&ecs->another_trap,
|
&ecs->another_trap,
|
&ecs->stepping_through_solib_after_catch,
|
&ecs->stepping_through_solib_after_catch,
|
&ecs->stepping_through_solib_catchpoints,
|
&ecs->stepping_through_solib_catchpoints,
|
&ecs->stepping_through_sigtramp);
|
&ecs->stepping_through_sigtramp);
|
}
|
}
|
|
|
inferior_pid = ecs->pid;
|
inferior_pid = ecs->pid;
|
|
|
if (context_hook)
|
if (context_hook)
|
context_hook (pid_to_thread_id (ecs->pid));
|
context_hook (pid_to_thread_id (ecs->pid));
|
|
|
flush_cached_frames ();
|
flush_cached_frames ();
|
}
|
}
|
|
|
if (SOFTWARE_SINGLE_STEP_P && singlestep_breakpoints_inserted_p)
|
if (SOFTWARE_SINGLE_STEP_P && singlestep_breakpoints_inserted_p)
|
{
|
{
|
/* Pull the single step breakpoints out of the target. */
|
/* Pull the single step breakpoints out of the target. */
|
SOFTWARE_SINGLE_STEP (0, 0);
|
SOFTWARE_SINGLE_STEP (0, 0);
|
singlestep_breakpoints_inserted_p = 0;
|
singlestep_breakpoints_inserted_p = 0;
|
}
|
}
|
|
|
/* If PC is pointing at a nullified instruction, then step beyond
|
/* If PC is pointing at a nullified instruction, then step beyond
|
it so that the user won't be confused when GDB appears to be ready
|
it so that the user won't be confused when GDB appears to be ready
|
to execute it. */
|
to execute it. */
|
|
|
/* if (INSTRUCTION_NULLIFIED && currently_stepping (ecs)) */
|
/* if (INSTRUCTION_NULLIFIED && currently_stepping (ecs)) */
|
if (INSTRUCTION_NULLIFIED)
|
if (INSTRUCTION_NULLIFIED)
|
{
|
{
|
registers_changed ();
|
registers_changed ();
|
target_resume (ecs->pid, 1, TARGET_SIGNAL_0);
|
target_resume (ecs->pid, 1, TARGET_SIGNAL_0);
|
|
|
/* We may have received a signal that we want to pass to
|
/* We may have received a signal that we want to pass to
|
the inferior; therefore, we must not clobber the waitstatus
|
the inferior; therefore, we must not clobber the waitstatus
|
in WS. */
|
in WS. */
|
|
|
ecs->infwait_state = infwait_nullified_state;
|
ecs->infwait_state = infwait_nullified_state;
|
ecs->waiton_pid = ecs->pid;
|
ecs->waiton_pid = ecs->pid;
|
ecs->wp = &(ecs->tmpstatus);
|
ecs->wp = &(ecs->tmpstatus);
|
prepare_to_wait (ecs);
|
prepare_to_wait (ecs);
|
return;
|
return;
|
}
|
}
|
|
|
/* It may not be necessary to disable the watchpoint to stop over
|
/* It may not be necessary to disable the watchpoint to stop over
|
it. For example, the PA can (with some kernel cooperation)
|
it. For example, the PA can (with some kernel cooperation)
|
single step over a watchpoint without disabling the watchpoint. */
|
single step over a watchpoint without disabling the watchpoint. */
|
if (HAVE_STEPPABLE_WATCHPOINT && STOPPED_BY_WATCHPOINT (ecs->ws))
|
if (HAVE_STEPPABLE_WATCHPOINT && STOPPED_BY_WATCHPOINT (ecs->ws))
|
{
|
{
|
resume (1, 0);
|
resume (1, 0);
|
prepare_to_wait (ecs);
|
prepare_to_wait (ecs);
|
return;
|
return;
|
}
|
}
|
|
|
/* It is far more common to need to disable a watchpoint to step
|
/* It is far more common to need to disable a watchpoint to step
|
the inferior over it. FIXME. What else might a debug
|
the inferior over it. FIXME. What else might a debug
|
register or page protection watchpoint scheme need here? */
|
register or page protection watchpoint scheme need here? */
|
if (HAVE_NONSTEPPABLE_WATCHPOINT && STOPPED_BY_WATCHPOINT (ecs->ws))
|
if (HAVE_NONSTEPPABLE_WATCHPOINT && STOPPED_BY_WATCHPOINT (ecs->ws))
|
{
|
{
|
/* At this point, we are stopped at an instruction which has
|
/* At this point, we are stopped at an instruction which has
|
attempted to write to a piece of memory under control of
|
attempted to write to a piece of memory under control of
|
a watchpoint. The instruction hasn't actually executed
|
a watchpoint. The instruction hasn't actually executed
|
yet. If we were to evaluate the watchpoint expression
|
yet. If we were to evaluate the watchpoint expression
|
now, we would get the old value, and therefore no change
|
now, we would get the old value, and therefore no change
|
would seem to have occurred.
|
would seem to have occurred.
|
|
|
In order to make watchpoints work `right', we really need
|
In order to make watchpoints work `right', we really need
|
to complete the memory write, and then evaluate the
|
to complete the memory write, and then evaluate the
|
watchpoint expression. The following code does that by
|
watchpoint expression. The following code does that by
|
removing the watchpoint (actually, all watchpoints and
|
removing the watchpoint (actually, all watchpoints and
|
breakpoints), single-stepping the target, re-inserting
|
breakpoints), single-stepping the target, re-inserting
|
watchpoints, and then falling through to let normal
|
watchpoints, and then falling through to let normal
|
single-step processing handle proceed. Since this
|
single-step processing handle proceed. Since this
|
includes evaluating watchpoints, things will come to a
|
includes evaluating watchpoints, things will come to a
|
stop in the correct manner. */
|
stop in the correct manner. */
|
|
|
write_pc (stop_pc - DECR_PC_AFTER_BREAK);
|
write_pc (stop_pc - DECR_PC_AFTER_BREAK);
|
|
|
remove_breakpoints ();
|
remove_breakpoints ();
|
registers_changed ();
|
registers_changed ();
|
target_resume (ecs->pid, 1, TARGET_SIGNAL_0); /* Single step */
|
target_resume (ecs->pid, 1, TARGET_SIGNAL_0); /* Single step */
|
|
|
ecs->waiton_pid = ecs->pid;
|
ecs->waiton_pid = ecs->pid;
|
ecs->wp = &(ecs->ws);
|
ecs->wp = &(ecs->ws);
|
ecs->infwait_state = infwait_nonstep_watch_state;
|
ecs->infwait_state = infwait_nonstep_watch_state;
|
prepare_to_wait (ecs);
|
prepare_to_wait (ecs);
|
return;
|
return;
|
}
|
}
|
|
|
/* It may be possible to simply continue after a watchpoint. */
|
/* It may be possible to simply continue after a watchpoint. */
|
if (HAVE_CONTINUABLE_WATCHPOINT)
|
if (HAVE_CONTINUABLE_WATCHPOINT)
|
STOPPED_BY_WATCHPOINT (ecs->ws);
|
STOPPED_BY_WATCHPOINT (ecs->ws);
|
|
|
ecs->stop_func_start = 0;
|
ecs->stop_func_start = 0;
|
ecs->stop_func_end = 0;
|
ecs->stop_func_end = 0;
|
ecs->stop_func_name = 0;
|
ecs->stop_func_name = 0;
|
/* Don't care about return value; stop_func_start and stop_func_name
|
/* Don't care about return value; stop_func_start and stop_func_name
|
will both be 0 if it doesn't work. */
|
will both be 0 if it doesn't work. */
|
find_pc_partial_function (stop_pc, &ecs->stop_func_name,
|
find_pc_partial_function (stop_pc, &ecs->stop_func_name,
|
&ecs->stop_func_start, &ecs->stop_func_end);
|
&ecs->stop_func_start, &ecs->stop_func_end);
|
ecs->stop_func_start += FUNCTION_START_OFFSET;
|
ecs->stop_func_start += FUNCTION_START_OFFSET;
|
ecs->another_trap = 0;
|
ecs->another_trap = 0;
|
bpstat_clear (&stop_bpstat);
|
bpstat_clear (&stop_bpstat);
|
stop_step = 0;
|
stop_step = 0;
|
stop_stack_dummy = 0;
|
stop_stack_dummy = 0;
|
stop_print_frame = 1;
|
stop_print_frame = 1;
|
ecs->random_signal = 0;
|
ecs->random_signal = 0;
|
stopped_by_random_signal = 0;
|
stopped_by_random_signal = 0;
|
breakpoints_failed = 0;
|
breakpoints_failed = 0;
|
|
|
/* Look at the cause of the stop, and decide what to do.
|
/* Look at the cause of the stop, and decide what to do.
|
The alternatives are:
|
The alternatives are:
|
1) break; to really stop and return to the debugger,
|
1) break; to really stop and return to the debugger,
|
2) drop through to start up again
|
2) drop through to start up again
|
(set ecs->another_trap to 1 to single step once)
|
(set ecs->another_trap to 1 to single step once)
|
3) set ecs->random_signal to 1, and the decision between 1 and 2
|
3) set ecs->random_signal to 1, and the decision between 1 and 2
|
will be made according to the signal handling tables. */
|
will be made according to the signal handling tables. */
|
|
|
/* First, distinguish signals caused by the debugger from signals
|
/* First, distinguish signals caused by the debugger from signals
|
that have to do with the program's own actions.
|
that have to do with the program's own actions.
|
Note that breakpoint insns may cause SIGTRAP or SIGILL
|
Note that breakpoint insns may cause SIGTRAP or SIGILL
|
or SIGEMT, depending on the operating system version.
|
or SIGEMT, depending on the operating system version.
|
Here we detect when a SIGILL or SIGEMT is really a breakpoint
|
Here we detect when a SIGILL or SIGEMT is really a breakpoint
|
and change it to SIGTRAP. */
|
and change it to SIGTRAP. */
|
|
|
if (stop_signal == TARGET_SIGNAL_TRAP
|
if (stop_signal == TARGET_SIGNAL_TRAP
|
|| (breakpoints_inserted &&
|
|| (breakpoints_inserted &&
|
(stop_signal == TARGET_SIGNAL_ILL
|
(stop_signal == TARGET_SIGNAL_ILL
|
|| stop_signal == TARGET_SIGNAL_EMT
|
|| stop_signal == TARGET_SIGNAL_EMT
|
))
|
))
|
|| stop_soon_quietly)
|
|| stop_soon_quietly)
|
{
|
{
|
if (stop_signal == TARGET_SIGNAL_TRAP && stop_after_trap)
|
if (stop_signal == TARGET_SIGNAL_TRAP && stop_after_trap)
|
{
|
{
|
stop_print_frame = 0;
|
stop_print_frame = 0;
|
stop_stepping (ecs);
|
stop_stepping (ecs);
|
return;
|
return;
|
}
|
}
|
if (stop_soon_quietly)
|
if (stop_soon_quietly)
|
{
|
{
|
stop_stepping (ecs);
|
stop_stepping (ecs);
|
return;
|
return;
|
}
|
}
|
|
|
/* Don't even think about breakpoints
|
/* Don't even think about breakpoints
|
if just proceeded over a breakpoint.
|
if just proceeded over a breakpoint.
|
|
|
However, if we are trying to proceed over a breakpoint
|
However, if we are trying to proceed over a breakpoint
|
and end up in sigtramp, then through_sigtramp_breakpoint
|
and end up in sigtramp, then through_sigtramp_breakpoint
|
will be set and we should check whether we've hit the
|
will be set and we should check whether we've hit the
|
step breakpoint. */
|
step breakpoint. */
|
if (stop_signal == TARGET_SIGNAL_TRAP && trap_expected
|
if (stop_signal == TARGET_SIGNAL_TRAP && trap_expected
|
&& through_sigtramp_breakpoint == NULL)
|
&& through_sigtramp_breakpoint == NULL)
|
bpstat_clear (&stop_bpstat);
|
bpstat_clear (&stop_bpstat);
|
else
|
else
|
{
|
{
|
/* See if there is a breakpoint at the current PC. */
|
/* See if there is a breakpoint at the current PC. */
|
stop_bpstat = bpstat_stop_status
|
stop_bpstat = bpstat_stop_status
|
(&stop_pc,
|
(&stop_pc,
|
/* Pass TRUE if our reason for stopping is something other
|
/* Pass TRUE if our reason for stopping is something other
|
than hitting a breakpoint. We do this by checking that
|
than hitting a breakpoint. We do this by checking that
|
1) stepping is going on and 2) we didn't hit a breakpoint
|
1) stepping is going on and 2) we didn't hit a breakpoint
|
in a signal handler without an intervening stop in
|
in a signal handler without an intervening stop in
|
sigtramp, which is detected by a new stack pointer value
|
sigtramp, which is detected by a new stack pointer value
|
below any usual function calling stack adjustments. */
|
below any usual function calling stack adjustments. */
|
(currently_stepping (ecs)
|
(currently_stepping (ecs)
|
&& !(step_range_end
|
&& !(step_range_end
|
&& INNER_THAN (read_sp (), (step_sp - 16))))
|
&& INNER_THAN (read_sp (), (step_sp - 16))))
|
);
|
);
|
/* Following in case break condition called a
|
/* Following in case break condition called a
|
function. */
|
function. */
|
stop_print_frame = 1;
|
stop_print_frame = 1;
|
}
|
}
|
|
|
if (stop_signal == TARGET_SIGNAL_TRAP)
|
if (stop_signal == TARGET_SIGNAL_TRAP)
|
ecs->random_signal
|
ecs->random_signal
|
= !(bpstat_explains_signal (stop_bpstat)
|
= !(bpstat_explains_signal (stop_bpstat)
|
|| trap_expected
|
|| trap_expected
|
|| (!CALL_DUMMY_BREAKPOINT_OFFSET_P
|
|| (!CALL_DUMMY_BREAKPOINT_OFFSET_P
|
&& PC_IN_CALL_DUMMY (stop_pc, read_sp (),
|
&& PC_IN_CALL_DUMMY (stop_pc, read_sp (),
|
FRAME_FP (get_current_frame ())))
|
FRAME_FP (get_current_frame ())))
|
|| (step_range_end && step_resume_breakpoint == NULL));
|
|| (step_range_end && step_resume_breakpoint == NULL));
|
|
|
else
|
else
|
{
|
{
|
ecs->random_signal
|
ecs->random_signal
|
= !(bpstat_explains_signal (stop_bpstat)
|
= !(bpstat_explains_signal (stop_bpstat)
|
/* End of a stack dummy. Some systems (e.g. Sony
|
/* End of a stack dummy. Some systems (e.g. Sony
|
news) give another signal besides SIGTRAP, so
|
news) give another signal besides SIGTRAP, so
|
check here as well as above. */
|
check here as well as above. */
|
|| (!CALL_DUMMY_BREAKPOINT_OFFSET_P
|
|| (!CALL_DUMMY_BREAKPOINT_OFFSET_P
|
&& PC_IN_CALL_DUMMY (stop_pc, read_sp (),
|
&& PC_IN_CALL_DUMMY (stop_pc, read_sp (),
|
FRAME_FP (get_current_frame ())))
|
FRAME_FP (get_current_frame ())))
|
);
|
);
|
if (!ecs->random_signal)
|
if (!ecs->random_signal)
|
stop_signal = TARGET_SIGNAL_TRAP;
|
stop_signal = TARGET_SIGNAL_TRAP;
|
}
|
}
|
}
|
}
|
|
|
/* When we reach this point, we've pretty much decided
|
/* When we reach this point, we've pretty much decided
|
that the reason for stopping must've been a random
|
that the reason for stopping must've been a random
|
(unexpected) signal. */
|
(unexpected) signal. */
|
|
|
else
|
else
|
ecs->random_signal = 1;
|
ecs->random_signal = 1;
|
/* If a fork, vfork or exec event was seen, then there are two
|
/* If a fork, vfork or exec event was seen, then there are two
|
possible responses we can make:
|
possible responses we can make:
|
|
|
1. If a catchpoint triggers for the event (ecs->random_signal == 0),
|
1. If a catchpoint triggers for the event (ecs->random_signal == 0),
|
then we must stop now and issue a prompt. We will resume
|
then we must stop now and issue a prompt. We will resume
|
the inferior when the user tells us to.
|
the inferior when the user tells us to.
|
2. If no catchpoint triggers for the event (ecs->random_signal == 1),
|
2. If no catchpoint triggers for the event (ecs->random_signal == 1),
|
then we must resume the inferior now and keep checking.
|
then we must resume the inferior now and keep checking.
|
|
|
In either case, we must take appropriate steps to "follow" the
|
In either case, we must take appropriate steps to "follow" the
|
the fork/vfork/exec when the inferior is resumed. For example,
|
the fork/vfork/exec when the inferior is resumed. For example,
|
if follow-fork-mode is "child", then we must detach from the
|
if follow-fork-mode is "child", then we must detach from the
|
parent inferior and follow the new child inferior.
|
parent inferior and follow the new child inferior.
|
|
|
In either case, setting pending_follow causes the next resume()
|
In either case, setting pending_follow causes the next resume()
|
to take the appropriate following action. */
|
to take the appropriate following action. */
|
process_event_stop_test:
|
process_event_stop_test:
|
if (ecs->ws.kind == TARGET_WAITKIND_FORKED)
|
if (ecs->ws.kind == TARGET_WAITKIND_FORKED)
|
{
|
{
|
if (ecs->random_signal) /* I.e., no catchpoint triggered for this. */
|
if (ecs->random_signal) /* I.e., no catchpoint triggered for this. */
|
{
|
{
|
trap_expected = 1;
|
trap_expected = 1;
|
stop_signal = TARGET_SIGNAL_0;
|
stop_signal = TARGET_SIGNAL_0;
|
keep_going (ecs);
|
keep_going (ecs);
|
return;
|
return;
|
}
|
}
|
}
|
}
|
else if (ecs->ws.kind == TARGET_WAITKIND_VFORKED)
|
else if (ecs->ws.kind == TARGET_WAITKIND_VFORKED)
|
{
|
{
|
if (ecs->random_signal) /* I.e., no catchpoint triggered for this. */
|
if (ecs->random_signal) /* I.e., no catchpoint triggered for this. */
|
{
|
{
|
stop_signal = TARGET_SIGNAL_0;
|
stop_signal = TARGET_SIGNAL_0;
|
keep_going (ecs);
|
keep_going (ecs);
|
return;
|
return;
|
}
|
}
|
}
|
}
|
else if (ecs->ws.kind == TARGET_WAITKIND_EXECD)
|
else if (ecs->ws.kind == TARGET_WAITKIND_EXECD)
|
{
|
{
|
pending_follow.kind = ecs->ws.kind;
|
pending_follow.kind = ecs->ws.kind;
|
if (ecs->random_signal) /* I.e., no catchpoint triggered for this. */
|
if (ecs->random_signal) /* I.e., no catchpoint triggered for this. */
|
{
|
{
|
trap_expected = 1;
|
trap_expected = 1;
|
stop_signal = TARGET_SIGNAL_0;
|
stop_signal = TARGET_SIGNAL_0;
|
keep_going (ecs);
|
keep_going (ecs);
|
return;
|
return;
|
}
|
}
|
}
|
}
|
|
|
/* For the program's own signals, act according to
|
/* For the program's own signals, act according to
|
the signal handling tables. */
|
the signal handling tables. */
|
|
|
if (ecs->random_signal)
|
if (ecs->random_signal)
|
{
|
{
|
/* Signal not for debugging purposes. */
|
/* Signal not for debugging purposes. */
|
int printed = 0;
|
int printed = 0;
|
|
|
stopped_by_random_signal = 1;
|
stopped_by_random_signal = 1;
|
|
|
if (signal_print[stop_signal])
|
if (signal_print[stop_signal])
|
{
|
{
|
printed = 1;
|
printed = 1;
|
target_terminal_ours_for_output ();
|
target_terminal_ours_for_output ();
|
print_stop_reason (SIGNAL_RECEIVED, stop_signal);
|
print_stop_reason (SIGNAL_RECEIVED, stop_signal);
|
}
|
}
|
if (signal_stop[stop_signal])
|
if (signal_stop[stop_signal])
|
{
|
{
|
stop_stepping (ecs);
|
stop_stepping (ecs);
|
return;
|
return;
|
}
|
}
|
/* If not going to stop, give terminal back
|
/* If not going to stop, give terminal back
|
if we took it away. */
|
if we took it away. */
|
else if (printed)
|
else if (printed)
|
target_terminal_inferior ();
|
target_terminal_inferior ();
|
|
|
/* Clear the signal if it should not be passed. */
|
/* Clear the signal if it should not be passed. */
|
if (signal_program[stop_signal] == 0)
|
if (signal_program[stop_signal] == 0)
|
stop_signal = TARGET_SIGNAL_0;
|
stop_signal = TARGET_SIGNAL_0;
|
|
|
/* I'm not sure whether this needs to be check_sigtramp2 or
|
/* I'm not sure whether this needs to be check_sigtramp2 or
|
whether it could/should be keep_going.
|
whether it could/should be keep_going.
|
|
|
This used to jump to step_over_function if we are stepping,
|
This used to jump to step_over_function if we are stepping,
|
which is wrong.
|
which is wrong.
|
|
|
Suppose the user does a `next' over a function call, and while
|
Suppose the user does a `next' over a function call, and while
|
that call is in progress, the inferior receives a signal for
|
that call is in progress, the inferior receives a signal for
|
which GDB does not stop (i.e., signal_stop[SIG] is false). In
|
which GDB does not stop (i.e., signal_stop[SIG] is false). In
|
that case, when we reach this point, there is already a
|
that case, when we reach this point, there is already a
|
step-resume breakpoint established, right where it should be:
|
step-resume breakpoint established, right where it should be:
|
immediately after the function call the user is "next"-ing
|
immediately after the function call the user is "next"-ing
|
over. If we call step_over_function now, two bad things
|
over. If we call step_over_function now, two bad things
|
happen:
|
happen:
|
|
|
- we'll create a new breakpoint, at wherever the current
|
- we'll create a new breakpoint, at wherever the current
|
frame's return address happens to be. That could be
|
frame's return address happens to be. That could be
|
anywhere, depending on what function call happens to be on
|
anywhere, depending on what function call happens to be on
|
the top of the stack at that point. Point is, it's probably
|
the top of the stack at that point. Point is, it's probably
|
not where we need it.
|
not where we need it.
|
|
|
- the existing step-resume breakpoint (which is at the correct
|
- the existing step-resume breakpoint (which is at the correct
|
address) will get orphaned: step_resume_breakpoint will point
|
address) will get orphaned: step_resume_breakpoint will point
|
to the new breakpoint, and the old step-resume breakpoint
|
to the new breakpoint, and the old step-resume breakpoint
|
will never be cleaned up.
|
will never be cleaned up.
|
|
|
The old behavior was meant to help HP-UX single-step out of
|
The old behavior was meant to help HP-UX single-step out of
|
sigtramps. It would place the new breakpoint at prev_pc, which
|
sigtramps. It would place the new breakpoint at prev_pc, which
|
was certainly wrong. I don't know the details there, so fixing
|
was certainly wrong. I don't know the details there, so fixing
|
this probably breaks that. As with anything else, it's up to
|
this probably breaks that. As with anything else, it's up to
|
the HP-UX maintainer to furnish a fix that doesn't break other
|
the HP-UX maintainer to furnish a fix that doesn't break other
|
platforms. --JimB, 20 May 1999 */
|
platforms. --JimB, 20 May 1999 */
|
check_sigtramp2 (ecs);
|
check_sigtramp2 (ecs);
|
}
|
}
|
|
|
/* Handle cases caused by hitting a breakpoint. */
|
/* Handle cases caused by hitting a breakpoint. */
|
{
|
{
|
CORE_ADDR jmp_buf_pc;
|
CORE_ADDR jmp_buf_pc;
|
struct bpstat_what what;
|
struct bpstat_what what;
|
|
|
what = bpstat_what (stop_bpstat);
|
what = bpstat_what (stop_bpstat);
|
|
|
if (what.call_dummy)
|
if (what.call_dummy)
|
{
|
{
|
stop_stack_dummy = 1;
|
stop_stack_dummy = 1;
|
#ifdef HP_OS_BUG
|
#ifdef HP_OS_BUG
|
trap_expected_after_continue = 1;
|
trap_expected_after_continue = 1;
|
#endif
|
#endif
|
}
|
}
|
|
|
switch (what.main_action)
|
switch (what.main_action)
|
{
|
{
|
case BPSTAT_WHAT_SET_LONGJMP_RESUME:
|
case BPSTAT_WHAT_SET_LONGJMP_RESUME:
|
/* If we hit the breakpoint at longjmp, disable it for the
|
/* If we hit the breakpoint at longjmp, disable it for the
|
duration of this command. Then, install a temporary
|
duration of this command. Then, install a temporary
|
breakpoint at the target of the jmp_buf. */
|
breakpoint at the target of the jmp_buf. */
|
disable_longjmp_breakpoint ();
|
disable_longjmp_breakpoint ();
|
remove_breakpoints ();
|
remove_breakpoints ();
|
breakpoints_inserted = 0;
|
breakpoints_inserted = 0;
|
if (!GET_LONGJMP_TARGET (&jmp_buf_pc))
|
if (!GET_LONGJMP_TARGET (&jmp_buf_pc))
|
{
|
{
|
keep_going (ecs);
|
keep_going (ecs);
|
return;
|
return;
|
}
|
}
|
|
|
/* Need to blow away step-resume breakpoint, as it
|
/* Need to blow away step-resume breakpoint, as it
|
interferes with us */
|
interferes with us */
|
if (step_resume_breakpoint != NULL)
|
if (step_resume_breakpoint != NULL)
|
{
|
{
|
delete_breakpoint (step_resume_breakpoint);
|
delete_breakpoint (step_resume_breakpoint);
|
step_resume_breakpoint = NULL;
|
step_resume_breakpoint = NULL;
|
}
|
}
|
/* Not sure whether we need to blow this away too, but probably
|
/* Not sure whether we need to blow this away too, but probably
|
it is like the step-resume breakpoint. */
|
it is like the step-resume breakpoint. */
|
if (through_sigtramp_breakpoint != NULL)
|
if (through_sigtramp_breakpoint != NULL)
|
{
|
{
|
delete_breakpoint (through_sigtramp_breakpoint);
|
delete_breakpoint (through_sigtramp_breakpoint);
|
through_sigtramp_breakpoint = NULL;
|
through_sigtramp_breakpoint = NULL;
|
}
|
}
|
|
|
#if 0
|
#if 0
|
/* FIXME - Need to implement nested temporary breakpoints */
|
/* FIXME - Need to implement nested temporary breakpoints */
|
if (step_over_calls > 0)
|
if (step_over_calls > 0)
|
set_longjmp_resume_breakpoint (jmp_buf_pc,
|
set_longjmp_resume_breakpoint (jmp_buf_pc,
|
get_current_frame ());
|
get_current_frame ());
|
else
|
else
|
#endif /* 0 */
|
#endif /* 0 */
|
set_longjmp_resume_breakpoint (jmp_buf_pc, NULL);
|
set_longjmp_resume_breakpoint (jmp_buf_pc, NULL);
|
ecs->handling_longjmp = 1; /* FIXME */
|
ecs->handling_longjmp = 1; /* FIXME */
|
keep_going (ecs);
|
keep_going (ecs);
|
return;
|
return;
|
|
|
case BPSTAT_WHAT_CLEAR_LONGJMP_RESUME:
|
case BPSTAT_WHAT_CLEAR_LONGJMP_RESUME:
|
case BPSTAT_WHAT_CLEAR_LONGJMP_RESUME_SINGLE:
|
case BPSTAT_WHAT_CLEAR_LONGJMP_RESUME_SINGLE:
|
remove_breakpoints ();
|
remove_breakpoints ();
|
breakpoints_inserted = 0;
|
breakpoints_inserted = 0;
|
#if 0
|
#if 0
|
/* FIXME - Need to implement nested temporary breakpoints */
|
/* FIXME - Need to implement nested temporary breakpoints */
|
if (step_over_calls
|
if (step_over_calls
|
&& (INNER_THAN (FRAME_FP (get_current_frame ()),
|
&& (INNER_THAN (FRAME_FP (get_current_frame ()),
|
step_frame_address)))
|
step_frame_address)))
|
{
|
{
|
ecs->another_trap = 1;
|
ecs->another_trap = 1;
|
keep_going (ecs);
|
keep_going (ecs);
|
return;
|
return;
|
}
|
}
|
#endif /* 0 */
|
#endif /* 0 */
|
disable_longjmp_breakpoint ();
|
disable_longjmp_breakpoint ();
|
ecs->handling_longjmp = 0; /* FIXME */
|
ecs->handling_longjmp = 0; /* FIXME */
|
if (what.main_action == BPSTAT_WHAT_CLEAR_LONGJMP_RESUME)
|
if (what.main_action == BPSTAT_WHAT_CLEAR_LONGJMP_RESUME)
|
break;
|
break;
|
/* else fallthrough */
|
/* else fallthrough */
|
|
|
case BPSTAT_WHAT_SINGLE:
|
case BPSTAT_WHAT_SINGLE:
|
if (breakpoints_inserted)
|
if (breakpoints_inserted)
|
{
|
{
|
thread_step_needed = 1;
|
thread_step_needed = 1;
|
remove_breakpoints ();
|
remove_breakpoints ();
|
}
|
}
|
breakpoints_inserted = 0;
|
breakpoints_inserted = 0;
|
ecs->another_trap = 1;
|
ecs->another_trap = 1;
|
/* Still need to check other stuff, at least the case
|
/* Still need to check other stuff, at least the case
|
where we are stepping and step out of the right range. */
|
where we are stepping and step out of the right range. */
|
break;
|
break;
|
|
|
case BPSTAT_WHAT_STOP_NOISY:
|
case BPSTAT_WHAT_STOP_NOISY:
|
stop_print_frame = 1;
|
stop_print_frame = 1;
|
|
|
/* We are about to nuke the step_resume_breakpoint and
|
/* We are about to nuke the step_resume_breakpoint and
|
through_sigtramp_breakpoint via the cleanup chain, so
|
through_sigtramp_breakpoint via the cleanup chain, so
|
no need to worry about it here. */
|
no need to worry about it here. */
|
|
|
stop_stepping (ecs);
|
stop_stepping (ecs);
|
return;
|
return;
|
|
|
case BPSTAT_WHAT_STOP_SILENT:
|
case BPSTAT_WHAT_STOP_SILENT:
|
stop_print_frame = 0;
|
stop_print_frame = 0;
|
|
|
/* We are about to nuke the step_resume_breakpoint and
|
/* We are about to nuke the step_resume_breakpoint and
|
through_sigtramp_breakpoint via the cleanup chain, so
|
through_sigtramp_breakpoint via the cleanup chain, so
|
no need to worry about it here. */
|
no need to worry about it here. */
|
|
|
stop_stepping (ecs);
|
stop_stepping (ecs);
|
return;
|
return;
|
|
|
case BPSTAT_WHAT_STEP_RESUME:
|
case BPSTAT_WHAT_STEP_RESUME:
|
/* This proably demands a more elegant solution, but, yeah
|
/* This proably demands a more elegant solution, but, yeah
|
right...
|
right...
|
|
|
This function's use of the simple variable
|
This function's use of the simple variable
|
step_resume_breakpoint doesn't seem to accomodate
|
step_resume_breakpoint doesn't seem to accomodate
|
simultaneously active step-resume bp's, although the
|
simultaneously active step-resume bp's, although the
|
breakpoint list certainly can.
|
breakpoint list certainly can.
|
|
|
If we reach here and step_resume_breakpoint is already
|
If we reach here and step_resume_breakpoint is already
|
NULL, then apparently we have multiple active
|
NULL, then apparently we have multiple active
|
step-resume bp's. We'll just delete the breakpoint we
|
step-resume bp's. We'll just delete the breakpoint we
|
stopped at, and carry on.
|
stopped at, and carry on.
|
|
|
Correction: what the code currently does is delete a
|
Correction: what the code currently does is delete a
|
step-resume bp, but it makes no effort to ensure that
|
step-resume bp, but it makes no effort to ensure that
|
the one deleted is the one currently stopped at. MVS */
|
the one deleted is the one currently stopped at. MVS */
|
|
|
if (step_resume_breakpoint == NULL)
|
if (step_resume_breakpoint == NULL)
|
{
|
{
|
step_resume_breakpoint =
|
step_resume_breakpoint =
|
bpstat_find_step_resume_breakpoint (stop_bpstat);
|
bpstat_find_step_resume_breakpoint (stop_bpstat);
|
}
|
}
|
delete_breakpoint (step_resume_breakpoint);
|
delete_breakpoint (step_resume_breakpoint);
|
step_resume_breakpoint = NULL;
|
step_resume_breakpoint = NULL;
|
break;
|
break;
|
|
|
case BPSTAT_WHAT_THROUGH_SIGTRAMP:
|
case BPSTAT_WHAT_THROUGH_SIGTRAMP:
|
if (through_sigtramp_breakpoint)
|
if (through_sigtramp_breakpoint)
|
delete_breakpoint (through_sigtramp_breakpoint);
|
delete_breakpoint (through_sigtramp_breakpoint);
|
through_sigtramp_breakpoint = NULL;
|
through_sigtramp_breakpoint = NULL;
|
|
|
/* If were waiting for a trap, hitting the step_resume_break
|
/* If were waiting for a trap, hitting the step_resume_break
|
doesn't count as getting it. */
|
doesn't count as getting it. */
|
if (trap_expected)
|
if (trap_expected)
|
ecs->another_trap = 1;
|
ecs->another_trap = 1;
|
break;
|
break;
|
|
|
case BPSTAT_WHAT_CHECK_SHLIBS:
|
case BPSTAT_WHAT_CHECK_SHLIBS:
|
case BPSTAT_WHAT_CHECK_SHLIBS_RESUME_FROM_HOOK:
|
case BPSTAT_WHAT_CHECK_SHLIBS_RESUME_FROM_HOOK:
|
#ifdef SOLIB_ADD
|
#ifdef SOLIB_ADD
|
{
|
{
|
/* Remove breakpoints, we eventually want to step over the
|
/* Remove breakpoints, we eventually want to step over the
|
shlib event breakpoint, and SOLIB_ADD might adjust
|
shlib event breakpoint, and SOLIB_ADD might adjust
|
breakpoint addresses via breakpoint_re_set. */
|
breakpoint addresses via breakpoint_re_set. */
|
if (breakpoints_inserted)
|
if (breakpoints_inserted)
|
remove_breakpoints ();
|
remove_breakpoints ();
|
breakpoints_inserted = 0;
|
breakpoints_inserted = 0;
|
|
|
/* Check for any newly added shared libraries if we're
|
/* Check for any newly added shared libraries if we're
|
supposed to be adding them automatically. */
|
supposed to be adding them automatically. */
|
if (auto_solib_add)
|
if (auto_solib_add)
|
{
|
{
|
/* Switch terminal for any messages produced by
|
/* Switch terminal for any messages produced by
|
breakpoint_re_set. */
|
breakpoint_re_set. */
|
target_terminal_ours_for_output ();
|
target_terminal_ours_for_output ();
|
SOLIB_ADD (NULL, 0, NULL);
|
SOLIB_ADD (NULL, 0, NULL);
|
target_terminal_inferior ();
|
target_terminal_inferior ();
|
}
|
}
|
|
|
/* Try to reenable shared library breakpoints, additional
|
/* Try to reenable shared library breakpoints, additional
|
code segments in shared libraries might be mapped in now. */
|
code segments in shared libraries might be mapped in now. */
|
re_enable_breakpoints_in_shlibs ();
|
re_enable_breakpoints_in_shlibs ();
|
|
|
/* If requested, stop when the dynamic linker notifies
|
/* If requested, stop when the dynamic linker notifies
|
gdb of events. This allows the user to get control
|
gdb of events. This allows the user to get control
|
and place breakpoints in initializer routines for
|
and place breakpoints in initializer routines for
|
dynamically loaded objects (among other things). */
|
dynamically loaded objects (among other things). */
|
if (stop_on_solib_events)
|
if (stop_on_solib_events)
|
{
|
{
|
stop_stepping (ecs);
|
stop_stepping (ecs);
|
return;
|
return;
|
}
|
}
|
|
|
/* If we stopped due to an explicit catchpoint, then the
|
/* If we stopped due to an explicit catchpoint, then the
|
(see above) call to SOLIB_ADD pulled in any symbols
|
(see above) call to SOLIB_ADD pulled in any symbols
|
from a newly-loaded library, if appropriate.
|
from a newly-loaded library, if appropriate.
|
|
|
We do want the inferior to stop, but not where it is
|
We do want the inferior to stop, but not where it is
|
now, which is in the dynamic linker callback. Rather,
|
now, which is in the dynamic linker callback. Rather,
|
we would like it stop in the user's program, just after
|
we would like it stop in the user's program, just after
|
the call that caused this catchpoint to trigger. That
|
the call that caused this catchpoint to trigger. That
|
gives the user a more useful vantage from which to
|
gives the user a more useful vantage from which to
|
examine their program's state. */
|
examine their program's state. */
|
else if (what.main_action == BPSTAT_WHAT_CHECK_SHLIBS_RESUME_FROM_HOOK)
|
else if (what.main_action == BPSTAT_WHAT_CHECK_SHLIBS_RESUME_FROM_HOOK)
|
{
|
{
|
/* ??rehrauer: If I could figure out how to get the
|
/* ??rehrauer: If I could figure out how to get the
|
right return PC from here, we could just set a temp
|
right return PC from here, we could just set a temp
|
breakpoint and resume. I'm not sure we can without
|
breakpoint and resume. I'm not sure we can without
|
cracking open the dld's shared libraries and sniffing
|
cracking open the dld's shared libraries and sniffing
|
their unwind tables and text/data ranges, and that's
|
their unwind tables and text/data ranges, and that's
|
not a terribly portable notion.
|
not a terribly portable notion.
|
|
|
Until that time, we must step the inferior out of the
|
Until that time, we must step the inferior out of the
|
dld callback, and also out of the dld itself (and any
|
dld callback, and also out of the dld itself (and any
|
code or stubs in libdld.sl, such as "shl_load" and
|
code or stubs in libdld.sl, such as "shl_load" and
|
friends) until we reach non-dld code. At that point,
|
friends) until we reach non-dld code. At that point,
|
we can stop stepping. */
|
we can stop stepping. */
|
bpstat_get_triggered_catchpoints (stop_bpstat,
|
bpstat_get_triggered_catchpoints (stop_bpstat,
|
&ecs->stepping_through_solib_catchpoints);
|
&ecs->stepping_through_solib_catchpoints);
|
ecs->stepping_through_solib_after_catch = 1;
|
ecs->stepping_through_solib_after_catch = 1;
|
|
|
/* Be sure to lift all breakpoints, so the inferior does
|
/* Be sure to lift all breakpoints, so the inferior does
|
actually step past this point... */
|
actually step past this point... */
|
ecs->another_trap = 1;
|
ecs->another_trap = 1;
|
break;
|
break;
|
}
|
}
|
else
|
else
|
{
|
{
|
/* We want to step over this breakpoint, then keep going. */
|
/* We want to step over this breakpoint, then keep going. */
|
ecs->another_trap = 1;
|
ecs->another_trap = 1;
|
break;
|
break;
|
}
|
}
|
}
|
}
|
#endif
|
#endif
|
break;
|
break;
|
|
|
case BPSTAT_WHAT_LAST:
|
case BPSTAT_WHAT_LAST:
|
/* Not a real code, but listed here to shut up gcc -Wall. */
|
/* Not a real code, but listed here to shut up gcc -Wall. */
|
|
|
case BPSTAT_WHAT_KEEP_CHECKING:
|
case BPSTAT_WHAT_KEEP_CHECKING:
|
break;
|
break;
|
}
|
}
|
}
|
}
|
|
|
/* We come here if we hit a breakpoint but should not
|
/* We come here if we hit a breakpoint but should not
|
stop for it. Possibly we also were stepping
|
stop for it. Possibly we also were stepping
|
and should stop for that. So fall through and
|
and should stop for that. So fall through and
|
test for stepping. But, if not stepping,
|
test for stepping. But, if not stepping,
|
do not stop. */
|
do not stop. */
|
|
|
/* Are we stepping to get the inferior out of the dynamic
|
/* Are we stepping to get the inferior out of the dynamic
|
linker's hook (and possibly the dld itself) after catching
|
linker's hook (and possibly the dld itself) after catching
|
a shlib event? */
|
a shlib event? */
|
if (ecs->stepping_through_solib_after_catch)
|
if (ecs->stepping_through_solib_after_catch)
|
{
|
{
|
#if defined(SOLIB_ADD)
|
#if defined(SOLIB_ADD)
|
/* Have we reached our destination? If not, keep going. */
|
/* Have we reached our destination? If not, keep going. */
|
if (SOLIB_IN_DYNAMIC_LINKER (ecs->pid, stop_pc))
|
if (SOLIB_IN_DYNAMIC_LINKER (ecs->pid, stop_pc))
|
{
|
{
|
ecs->another_trap = 1;
|
ecs->another_trap = 1;
|
keep_going (ecs);
|
keep_going (ecs);
|
return;
|
return;
|
}
|
}
|
#endif
|
#endif
|
/* Else, stop and report the catchpoint(s) whose triggering
|
/* Else, stop and report the catchpoint(s) whose triggering
|
caused us to begin stepping. */
|
caused us to begin stepping. */
|
ecs->stepping_through_solib_after_catch = 0;
|
ecs->stepping_through_solib_after_catch = 0;
|
bpstat_clear (&stop_bpstat);
|
bpstat_clear (&stop_bpstat);
|
stop_bpstat = bpstat_copy (ecs->stepping_through_solib_catchpoints);
|
stop_bpstat = bpstat_copy (ecs->stepping_through_solib_catchpoints);
|
bpstat_clear (&ecs->stepping_through_solib_catchpoints);
|
bpstat_clear (&ecs->stepping_through_solib_catchpoints);
|
stop_print_frame = 1;
|
stop_print_frame = 1;
|
stop_stepping (ecs);
|
stop_stepping (ecs);
|
return;
|
return;
|
}
|
}
|
|
|
if (!CALL_DUMMY_BREAKPOINT_OFFSET_P)
|
if (!CALL_DUMMY_BREAKPOINT_OFFSET_P)
|
{
|
{
|
/* This is the old way of detecting the end of the stack dummy.
|
/* This is the old way of detecting the end of the stack dummy.
|
An architecture which defines CALL_DUMMY_BREAKPOINT_OFFSET gets
|
An architecture which defines CALL_DUMMY_BREAKPOINT_OFFSET gets
|
handled above. As soon as we can test it on all of them, all
|
handled above. As soon as we can test it on all of them, all
|
architectures should define it. */
|
architectures should define it. */
|
|
|
/* If this is the breakpoint at the end of a stack dummy,
|
/* If this is the breakpoint at the end of a stack dummy,
|
just stop silently, unless the user was doing an si/ni, in which
|
just stop silently, unless the user was doing an si/ni, in which
|
case she'd better know what she's doing. */
|
case she'd better know what she's doing. */
|
|
|
if (CALL_DUMMY_HAS_COMPLETED (stop_pc, read_sp (),
|
if (CALL_DUMMY_HAS_COMPLETED (stop_pc, read_sp (),
|
FRAME_FP (get_current_frame ()))
|
FRAME_FP (get_current_frame ()))
|
&& !step_range_end)
|
&& !step_range_end)
|
{
|
{
|
stop_print_frame = 0;
|
stop_print_frame = 0;
|
stop_stack_dummy = 1;
|
stop_stack_dummy = 1;
|
#ifdef HP_OS_BUG
|
#ifdef HP_OS_BUG
|
trap_expected_after_continue = 1;
|
trap_expected_after_continue = 1;
|
#endif
|
#endif
|
stop_stepping (ecs);
|
stop_stepping (ecs);
|
return;
|
return;
|
}
|
}
|
}
|
}
|
|
|
if (step_resume_breakpoint)
|
if (step_resume_breakpoint)
|
{
|
{
|
/* Having a step-resume breakpoint overrides anything
|
/* Having a step-resume breakpoint overrides anything
|
else having to do with stepping commands until
|
else having to do with stepping commands until
|
that breakpoint is reached. */
|
that breakpoint is reached. */
|
/* I'm not sure whether this needs to be check_sigtramp2 or
|
/* I'm not sure whether this needs to be check_sigtramp2 or
|
whether it could/should be keep_going. */
|
whether it could/should be keep_going. */
|
check_sigtramp2 (ecs);
|
check_sigtramp2 (ecs);
|
keep_going (ecs);
|
keep_going (ecs);
|
return;
|
return;
|
}
|
}
|
|
|
if (step_range_end == 0)
|
if (step_range_end == 0)
|
{
|
{
|
/* Likewise if we aren't even stepping. */
|
/* Likewise if we aren't even stepping. */
|
/* I'm not sure whether this needs to be check_sigtramp2 or
|
/* I'm not sure whether this needs to be check_sigtramp2 or
|
whether it could/should be keep_going. */
|
whether it could/should be keep_going. */
|
check_sigtramp2 (ecs);
|
check_sigtramp2 (ecs);
|
keep_going (ecs);
|
keep_going (ecs);
|
return;
|
return;
|
}
|
}
|
|
|
/* If stepping through a line, keep going if still within it.
|
/* If stepping through a line, keep going if still within it.
|
|
|
Note that step_range_end is the address of the first instruction
|
Note that step_range_end is the address of the first instruction
|
beyond the step range, and NOT the address of the last instruction
|
beyond the step range, and NOT the address of the last instruction
|
within it! */
|
within it! */
|
if (stop_pc >= step_range_start
|
if (stop_pc >= step_range_start
|
&& stop_pc < step_range_end)
|
&& stop_pc < step_range_end)
|
{
|
{
|
/* We might be doing a BPSTAT_WHAT_SINGLE and getting a signal.
|
/* We might be doing a BPSTAT_WHAT_SINGLE and getting a signal.
|
So definately need to check for sigtramp here. */
|
So definately need to check for sigtramp here. */
|
check_sigtramp2 (ecs);
|
check_sigtramp2 (ecs);
|
keep_going (ecs);
|
keep_going (ecs);
|
return;
|
return;
|
}
|
}
|
|
|
/* We stepped out of the stepping range. */
|
/* We stepped out of the stepping range. */
|
|
|
/* If we are stepping at the source level and entered the runtime
|
/* If we are stepping at the source level and entered the runtime
|
loader dynamic symbol resolution code, we keep on single stepping
|
loader dynamic symbol resolution code, we keep on single stepping
|
until we exit the run time loader code and reach the callee's
|
until we exit the run time loader code and reach the callee's
|
address. */
|
address. */
|
if (step_over_calls < 0 && IN_SOLIB_DYNSYM_RESOLVE_CODE (stop_pc))
|
if (step_over_calls < 0 && IN_SOLIB_DYNSYM_RESOLVE_CODE (stop_pc))
|
{
|
{
|
CORE_ADDR pc_after_resolver = SKIP_SOLIB_RESOLVER (stop_pc);
|
CORE_ADDR pc_after_resolver = SKIP_SOLIB_RESOLVER (stop_pc);
|
|
|
if (pc_after_resolver)
|
if (pc_after_resolver)
|
{
|
{
|
/* Set up a step-resume breakpoint at the address
|
/* Set up a step-resume breakpoint at the address
|
indicated by SKIP_SOLIB_RESOLVER. */
|
indicated by SKIP_SOLIB_RESOLVER. */
|
struct symtab_and_line sr_sal;
|
struct symtab_and_line sr_sal;
|
INIT_SAL (&sr_sal);
|
INIT_SAL (&sr_sal);
|
sr_sal.pc = pc_after_resolver;
|
sr_sal.pc = pc_after_resolver;
|
|
|
check_for_old_step_resume_breakpoint ();
|
check_for_old_step_resume_breakpoint ();
|
step_resume_breakpoint =
|
step_resume_breakpoint =
|
set_momentary_breakpoint (sr_sal, NULL, bp_step_resume);
|
set_momentary_breakpoint (sr_sal, NULL, bp_step_resume);
|
if (breakpoints_inserted)
|
if (breakpoints_inserted)
|
insert_breakpoints ();
|
insert_breakpoints ();
|
}
|
}
|
|
|
keep_going (ecs);
|
keep_going (ecs);
|
return;
|
return;
|
}
|
}
|
|
|
/* We can't update step_sp every time through the loop, because
|
/* We can't update step_sp every time through the loop, because
|
reading the stack pointer would slow down stepping too much.
|
reading the stack pointer would slow down stepping too much.
|
But we can update it every time we leave the step range. */
|
But we can update it every time we leave the step range. */
|
ecs->update_step_sp = 1;
|
ecs->update_step_sp = 1;
|
|
|
/* Did we just take a signal? */
|
/* Did we just take a signal? */
|
if (IN_SIGTRAMP (stop_pc, ecs->stop_func_name)
|
if (IN_SIGTRAMP (stop_pc, ecs->stop_func_name)
|
&& !IN_SIGTRAMP (prev_pc, prev_func_name)
|
&& !IN_SIGTRAMP (prev_pc, prev_func_name)
|
&& INNER_THAN (read_sp (), step_sp))
|
&& INNER_THAN (read_sp (), step_sp))
|
{
|
{
|
/* We've just taken a signal; go until we are back to
|
/* We've just taken a signal; go until we are back to
|
the point where we took it and one more. */
|
the point where we took it and one more. */
|
|
|
/* Note: The test above succeeds not only when we stepped
|
/* Note: The test above succeeds not only when we stepped
|
into a signal handler, but also when we step past the last
|
into a signal handler, but also when we step past the last
|
statement of a signal handler and end up in the return stub
|
statement of a signal handler and end up in the return stub
|
of the signal handler trampoline. To distinguish between
|
of the signal handler trampoline. To distinguish between
|
these two cases, check that the frame is INNER_THAN the
|
these two cases, check that the frame is INNER_THAN the
|
previous one below. pai/1997-09-11 */
|
previous one below. pai/1997-09-11 */
|
|
|
|
|
{
|
{
|
CORE_ADDR current_frame = FRAME_FP (get_current_frame ());
|
CORE_ADDR current_frame = FRAME_FP (get_current_frame ());
|
|
|
if (INNER_THAN (current_frame, step_frame_address))
|
if (INNER_THAN (current_frame, step_frame_address))
|
{
|
{
|
/* We have just taken a signal; go until we are back to
|
/* We have just taken a signal; go until we are back to
|
the point where we took it and one more. */
|
the point where we took it and one more. */
|
|
|
/* This code is needed at least in the following case:
|
/* This code is needed at least in the following case:
|
The user types "next" and then a signal arrives (before
|
The user types "next" and then a signal arrives (before
|
the "next" is done). */
|
the "next" is done). */
|
|
|
/* Note that if we are stopped at a breakpoint, then we need
|
/* Note that if we are stopped at a breakpoint, then we need
|
the step_resume breakpoint to override any breakpoints at
|
the step_resume breakpoint to override any breakpoints at
|
the same location, so that we will still step over the
|
the same location, so that we will still step over the
|
breakpoint even though the signal happened. */
|
breakpoint even though the signal happened. */
|
struct symtab_and_line sr_sal;
|
struct symtab_and_line sr_sal;
|
|
|
INIT_SAL (&sr_sal);
|
INIT_SAL (&sr_sal);
|
sr_sal.symtab = NULL;
|
sr_sal.symtab = NULL;
|
sr_sal.line = 0;
|
sr_sal.line = 0;
|
sr_sal.pc = prev_pc;
|
sr_sal.pc = prev_pc;
|
/* We could probably be setting the frame to
|
/* We could probably be setting the frame to
|
step_frame_address; I don't think anyone thought to
|
step_frame_address; I don't think anyone thought to
|
try it. */
|
try it. */
|
check_for_old_step_resume_breakpoint ();
|
check_for_old_step_resume_breakpoint ();
|
step_resume_breakpoint =
|
step_resume_breakpoint =
|
set_momentary_breakpoint (sr_sal, NULL, bp_step_resume);
|
set_momentary_breakpoint (sr_sal, NULL, bp_step_resume);
|
if (breakpoints_inserted)
|
if (breakpoints_inserted)
|
insert_breakpoints ();
|
insert_breakpoints ();
|
}
|
}
|
else
|
else
|
{
|
{
|
/* We just stepped out of a signal handler and into
|
/* We just stepped out of a signal handler and into
|
its calling trampoline.
|
its calling trampoline.
|
|
|
Normally, we'd call step_over_function from
|
Normally, we'd call step_over_function from
|
here, but for some reason GDB can't unwind the
|
here, but for some reason GDB can't unwind the
|
stack correctly to find the real PC for the point
|
stack correctly to find the real PC for the point
|
user code where the signal trampoline will return
|
user code where the signal trampoline will return
|
-- FRAME_SAVED_PC fails, at least on HP-UX 10.20.
|
-- FRAME_SAVED_PC fails, at least on HP-UX 10.20.
|
But signal trampolines are pretty small stubs of
|
But signal trampolines are pretty small stubs of
|
code, anyway, so it's OK instead to just
|
code, anyway, so it's OK instead to just
|
single-step out. Note: assuming such trampolines
|
single-step out. Note: assuming such trampolines
|
don't exhibit recursion on any platform... */
|
don't exhibit recursion on any platform... */
|
find_pc_partial_function (stop_pc, &ecs->stop_func_name,
|
find_pc_partial_function (stop_pc, &ecs->stop_func_name,
|
&ecs->stop_func_start,
|
&ecs->stop_func_start,
|
&ecs->stop_func_end);
|
&ecs->stop_func_end);
|
/* Readjust stepping range */
|
/* Readjust stepping range */
|
step_range_start = ecs->stop_func_start;
|
step_range_start = ecs->stop_func_start;
|
step_range_end = ecs->stop_func_end;
|
step_range_end = ecs->stop_func_end;
|
ecs->stepping_through_sigtramp = 1;
|
ecs->stepping_through_sigtramp = 1;
|
}
|
}
|
}
|
}
|
|
|
|
|
/* If this is stepi or nexti, make sure that the stepping range
|
/* If this is stepi or nexti, make sure that the stepping range
|
gets us past that instruction. */
|
gets us past that instruction. */
|
if (step_range_end == 1)
|
if (step_range_end == 1)
|
/* FIXME: Does this run afoul of the code below which, if
|
/* FIXME: Does this run afoul of the code below which, if
|
we step into the middle of a line, resets the stepping
|
we step into the middle of a line, resets the stepping
|
range? */
|
range? */
|
step_range_end = (step_range_start = prev_pc) + 1;
|
step_range_end = (step_range_start = prev_pc) + 1;
|
|
|
ecs->remove_breakpoints_on_following_step = 1;
|
ecs->remove_breakpoints_on_following_step = 1;
|
keep_going (ecs);
|
keep_going (ecs);
|
return;
|
return;
|
}
|
}
|
|
|
if (stop_pc == ecs->stop_func_start /* Quick test */
|
if (stop_pc == ecs->stop_func_start /* Quick test */
|
|| (in_prologue (stop_pc, ecs->stop_func_start) &&
|
|| (in_prologue (stop_pc, ecs->stop_func_start) &&
|
!IN_SOLIB_RETURN_TRAMPOLINE (stop_pc, ecs->stop_func_name))
|
!IN_SOLIB_RETURN_TRAMPOLINE (stop_pc, ecs->stop_func_name))
|
|| IN_SOLIB_CALL_TRAMPOLINE (stop_pc, ecs->stop_func_name)
|
|| IN_SOLIB_CALL_TRAMPOLINE (stop_pc, ecs->stop_func_name)
|
|| ecs->stop_func_name == 0)
|
|| ecs->stop_func_name == 0)
|
{
|
{
|
/* It's a subroutine call. */
|
/* It's a subroutine call. */
|
|
|
if (step_over_calls == 0)
|
if (step_over_calls == 0)
|
{
|
{
|
/* I presume that step_over_calls is only 0 when we're
|
/* I presume that step_over_calls is only 0 when we're
|
supposed to be stepping at the assembly language level
|
supposed to be stepping at the assembly language level
|
("stepi"). Just stop. */
|
("stepi"). Just stop. */
|
stop_step = 1;
|
stop_step = 1;
|
print_stop_reason (END_STEPPING_RANGE, 0);
|
print_stop_reason (END_STEPPING_RANGE, 0);
|
stop_stepping (ecs);
|
stop_stepping (ecs);
|
return;
|
return;
|
}
|
}
|
|
|
if (step_over_calls > 0 || IGNORE_HELPER_CALL (stop_pc))
|
if (step_over_calls > 0 || IGNORE_HELPER_CALL (stop_pc))
|
{
|
{
|
/* We're doing a "next". */
|
/* We're doing a "next". */
|
step_over_function (ecs);
|
step_over_function (ecs);
|
keep_going (ecs);
|
keep_going (ecs);
|
return;
|
return;
|
}
|
}
|
|
|
/* If we are in a function call trampoline (a stub between
|
/* If we are in a function call trampoline (a stub between
|
the calling routine and the real function), locate the real
|
the calling routine and the real function), locate the real
|
function. That's what tells us (a) whether we want to step
|
function. That's what tells us (a) whether we want to step
|
into it at all, and (b) what prologue we want to run to
|
into it at all, and (b) what prologue we want to run to
|
the end of, if we do step into it. */
|
the end of, if we do step into it. */
|
tmp = SKIP_TRAMPOLINE_CODE (stop_pc);
|
tmp = SKIP_TRAMPOLINE_CODE (stop_pc);
|
if (tmp != 0)
|
if (tmp != 0)
|
ecs->stop_func_start = tmp;
|
ecs->stop_func_start = tmp;
|
else
|
else
|
{
|
{
|
tmp = DYNAMIC_TRAMPOLINE_NEXTPC (stop_pc);
|
tmp = DYNAMIC_TRAMPOLINE_NEXTPC (stop_pc);
|
if (tmp)
|
if (tmp)
|
{
|
{
|
struct symtab_and_line xxx;
|
struct symtab_and_line xxx;
|
/* Why isn't this s_a_l called "sr_sal", like all of the
|
/* Why isn't this s_a_l called "sr_sal", like all of the
|
other s_a_l's where this code is duplicated? */
|
other s_a_l's where this code is duplicated? */
|
INIT_SAL (&xxx); /* initialize to zeroes */
|
INIT_SAL (&xxx); /* initialize to zeroes */
|
xxx.pc = tmp;
|
xxx.pc = tmp;
|
xxx.section = find_pc_overlay (xxx.pc);
|
xxx.section = find_pc_overlay (xxx.pc);
|
check_for_old_step_resume_breakpoint ();
|
check_for_old_step_resume_breakpoint ();
|
step_resume_breakpoint =
|
step_resume_breakpoint =
|
set_momentary_breakpoint (xxx, NULL, bp_step_resume);
|
set_momentary_breakpoint (xxx, NULL, bp_step_resume);
|
insert_breakpoints ();
|
insert_breakpoints ();
|
keep_going (ecs);
|
keep_going (ecs);
|
return;
|
return;
|
}
|
}
|
}
|
}
|
|
|
/* If we have line number information for the function we
|
/* If we have line number information for the function we
|
are thinking of stepping into, step into it.
|
are thinking of stepping into, step into it.
|
|
|
If there are several symtabs at that PC (e.g. with include
|
If there are several symtabs at that PC (e.g. with include
|
files), just want to know whether *any* of them have line
|
files), just want to know whether *any* of them have line
|
numbers. find_pc_line handles this. */
|
numbers. find_pc_line handles this. */
|
{
|
{
|
struct symtab_and_line tmp_sal;
|
struct symtab_and_line tmp_sal;
|
|
|
tmp_sal = find_pc_line (ecs->stop_func_start, 0);
|
tmp_sal = find_pc_line (ecs->stop_func_start, 0);
|
if (tmp_sal.line != 0)
|
if (tmp_sal.line != 0)
|
{
|
{
|
step_into_function (ecs);
|
step_into_function (ecs);
|
return;
|
return;
|
}
|
}
|
}
|
}
|
step_over_function (ecs);
|
step_over_function (ecs);
|
keep_going (ecs);
|
keep_going (ecs);
|
return;
|
return;
|
|
|
}
|
}
|
|
|
/* We've wandered out of the step range. */
|
/* We've wandered out of the step range. */
|
|
|
ecs->sal = find_pc_line (stop_pc, 0);
|
ecs->sal = find_pc_line (stop_pc, 0);
|
|
|
if (step_range_end == 1)
|
if (step_range_end == 1)
|
{
|
{
|
/* It is stepi or nexti. We always want to stop stepping after
|
/* It is stepi or nexti. We always want to stop stepping after
|
one instruction. */
|
one instruction. */
|
stop_step = 1;
|
stop_step = 1;
|
print_stop_reason (END_STEPPING_RANGE, 0);
|
print_stop_reason (END_STEPPING_RANGE, 0);
|
stop_stepping (ecs);
|
stop_stepping (ecs);
|
return;
|
return;
|
}
|
}
|
|
|
/* If we're in the return path from a shared library trampoline,
|
/* If we're in the return path from a shared library trampoline,
|
we want to proceed through the trampoline when stepping. */
|
we want to proceed through the trampoline when stepping. */
|
if (IN_SOLIB_RETURN_TRAMPOLINE (stop_pc, ecs->stop_func_name))
|
if (IN_SOLIB_RETURN_TRAMPOLINE (stop_pc, ecs->stop_func_name))
|
{
|
{
|
CORE_ADDR tmp;
|
CORE_ADDR tmp;
|
|
|
/* Determine where this trampoline returns. */
|
/* Determine where this trampoline returns. */
|
tmp = SKIP_TRAMPOLINE_CODE (stop_pc);
|
tmp = SKIP_TRAMPOLINE_CODE (stop_pc);
|
|
|
/* Only proceed through if we know where it's going. */
|
/* Only proceed through if we know where it's going. */
|
if (tmp)
|
if (tmp)
|
{
|
{
|
/* And put the step-breakpoint there and go until there. */
|
/* And put the step-breakpoint there and go until there. */
|
struct symtab_and_line sr_sal;
|
struct symtab_and_line sr_sal;
|
|
|
INIT_SAL (&sr_sal); /* initialize to zeroes */
|
INIT_SAL (&sr_sal); /* initialize to zeroes */
|
sr_sal.pc = tmp;
|
sr_sal.pc = tmp;
|
sr_sal.section = find_pc_overlay (sr_sal.pc);
|
sr_sal.section = find_pc_overlay (sr_sal.pc);
|
/* Do not specify what the fp should be when we stop
|
/* Do not specify what the fp should be when we stop
|
since on some machines the prologue
|
since on some machines the prologue
|
is where the new fp value is established. */
|
is where the new fp value is established. */
|
check_for_old_step_resume_breakpoint ();
|
check_for_old_step_resume_breakpoint ();
|
step_resume_breakpoint =
|
step_resume_breakpoint =
|
set_momentary_breakpoint (sr_sal, NULL, bp_step_resume);
|
set_momentary_breakpoint (sr_sal, NULL, bp_step_resume);
|
if (breakpoints_inserted)
|
if (breakpoints_inserted)
|
insert_breakpoints ();
|
insert_breakpoints ();
|
|
|
/* Restart without fiddling with the step ranges or
|
/* Restart without fiddling with the step ranges or
|
other state. */
|
other state. */
|
keep_going (ecs);
|
keep_going (ecs);
|
return;
|
return;
|
}
|
}
|
}
|
}
|
|
|
if (ecs->sal.line == 0)
|
if (ecs->sal.line == 0)
|
{
|
{
|
/* We have no line number information. That means to stop
|
/* We have no line number information. That means to stop
|
stepping (does this always happen right after one instruction,
|
stepping (does this always happen right after one instruction,
|
when we do "s" in a function with no line numbers,
|
when we do "s" in a function with no line numbers,
|
or can this happen as a result of a return or longjmp?). */
|
or can this happen as a result of a return or longjmp?). */
|
stop_step = 1;
|
stop_step = 1;
|
print_stop_reason (END_STEPPING_RANGE, 0);
|
print_stop_reason (END_STEPPING_RANGE, 0);
|
stop_stepping (ecs);
|
stop_stepping (ecs);
|
return;
|
return;
|
}
|
}
|
|
|
if ((stop_pc == ecs->sal.pc)
|
if ((stop_pc == ecs->sal.pc)
|
&& (ecs->current_line != ecs->sal.line || ecs->current_symtab != ecs->sal.symtab))
|
&& (ecs->current_line != ecs->sal.line || ecs->current_symtab != ecs->sal.symtab))
|
{
|
{
|
/* We are at the start of a different line. So stop. Note that
|
/* We are at the start of a different line. So stop. Note that
|
we don't stop if we step into the middle of a different line.
|
we don't stop if we step into the middle of a different line.
|
That is said to make things like for (;;) statements work
|
That is said to make things like for (;;) statements work
|
better. */
|
better. */
|
stop_step = 1;
|
stop_step = 1;
|
print_stop_reason (END_STEPPING_RANGE, 0);
|
print_stop_reason (END_STEPPING_RANGE, 0);
|
stop_stepping (ecs);
|
stop_stepping (ecs);
|
return;
|
return;
|
}
|
}
|
|
|
/* We aren't done stepping.
|
/* We aren't done stepping.
|
|
|
Optimize by setting the stepping range to the line.
|
Optimize by setting the stepping range to the line.
|
(We might not be in the original line, but if we entered a
|
(We might not be in the original line, but if we entered a
|
new line in mid-statement, we continue stepping. This makes
|
new line in mid-statement, we continue stepping. This makes
|
things like for(;;) statements work better.) */
|
things like for(;;) statements work better.) */
|
|
|
if (ecs->stop_func_end && ecs->sal.end >= ecs->stop_func_end)
|
if (ecs->stop_func_end && ecs->sal.end >= ecs->stop_func_end)
|
{
|
{
|
/* If this is the last line of the function, don't keep stepping
|
/* If this is the last line of the function, don't keep stepping
|
(it would probably step us out of the function).
|
(it would probably step us out of the function).
|
This is particularly necessary for a one-line function,
|
This is particularly necessary for a one-line function,
|
in which after skipping the prologue we better stop even though
|
in which after skipping the prologue we better stop even though
|
we will be in mid-line. */
|
we will be in mid-line. */
|
stop_step = 1;
|
stop_step = 1;
|
print_stop_reason (END_STEPPING_RANGE, 0);
|
print_stop_reason (END_STEPPING_RANGE, 0);
|
stop_stepping (ecs);
|
stop_stepping (ecs);
|
return;
|
return;
|
}
|
}
|
step_range_start = ecs->sal.pc;
|
step_range_start = ecs->sal.pc;
|
step_range_end = ecs->sal.end;
|
step_range_end = ecs->sal.end;
|
step_frame_address = FRAME_FP (get_current_frame ());
|
step_frame_address = FRAME_FP (get_current_frame ());
|
ecs->current_line = ecs->sal.line;
|
ecs->current_line = ecs->sal.line;
|
ecs->current_symtab = ecs->sal.symtab;
|
ecs->current_symtab = ecs->sal.symtab;
|
|
|
/* In the case where we just stepped out of a function into the middle
|
/* In the case where we just stepped out of a function into the middle
|
of a line of the caller, continue stepping, but step_frame_address
|
of a line of the caller, continue stepping, but step_frame_address
|
must be modified to current frame */
|
must be modified to current frame */
|
{
|
{
|
CORE_ADDR current_frame = FRAME_FP (get_current_frame ());
|
CORE_ADDR current_frame = FRAME_FP (get_current_frame ());
|
if (!(INNER_THAN (current_frame, step_frame_address)))
|
if (!(INNER_THAN (current_frame, step_frame_address)))
|
step_frame_address = current_frame;
|
step_frame_address = current_frame;
|
}
|
}
|
|
|
keep_going (ecs);
|
keep_going (ecs);
|
|
|
} /* extra brace, to preserve old indentation */
|
} /* extra brace, to preserve old indentation */
|
}
|
}
|
|
|
/* Are we in the middle of stepping? */
|
/* Are we in the middle of stepping? */
|
|
|
static int
|
static int
|
currently_stepping (struct execution_control_state *ecs)
|
currently_stepping (struct execution_control_state *ecs)
|
{
|
{
|
return ((through_sigtramp_breakpoint == NULL
|
return ((through_sigtramp_breakpoint == NULL
|
&& !ecs->handling_longjmp
|
&& !ecs->handling_longjmp
|
&& ((step_range_end && step_resume_breakpoint == NULL)
|
&& ((step_range_end && step_resume_breakpoint == NULL)
|
|| trap_expected))
|
|| trap_expected))
|
|| ecs->stepping_through_solib_after_catch
|
|| ecs->stepping_through_solib_after_catch
|
|| bpstat_should_step ());
|
|| bpstat_should_step ());
|
}
|
}
|
|
|
static void
|
static void
|
check_sigtramp2 (struct execution_control_state *ecs)
|
check_sigtramp2 (struct execution_control_state *ecs)
|
{
|
{
|
if (trap_expected
|
if (trap_expected
|
&& IN_SIGTRAMP (stop_pc, ecs->stop_func_name)
|
&& IN_SIGTRAMP (stop_pc, ecs->stop_func_name)
|
&& !IN_SIGTRAMP (prev_pc, prev_func_name)
|
&& !IN_SIGTRAMP (prev_pc, prev_func_name)
|
&& INNER_THAN (read_sp (), step_sp))
|
&& INNER_THAN (read_sp (), step_sp))
|
{
|
{
|
/* What has happened here is that we have just stepped the
|
/* What has happened here is that we have just stepped the
|
inferior with a signal (because it is a signal which
|
inferior with a signal (because it is a signal which
|
shouldn't make us stop), thus stepping into sigtramp.
|
shouldn't make us stop), thus stepping into sigtramp.
|
|
|
So we need to set a step_resume_break_address breakpoint and
|
So we need to set a step_resume_break_address breakpoint and
|
continue until we hit it, and then step. FIXME: This should
|
continue until we hit it, and then step. FIXME: This should
|
be more enduring than a step_resume breakpoint; we should
|
be more enduring than a step_resume breakpoint; we should
|
know that we will later need to keep going rather than
|
know that we will later need to keep going rather than
|
re-hitting the breakpoint here (see the testsuite,
|
re-hitting the breakpoint here (see the testsuite,
|
gdb.base/signals.exp where it says "exceedingly difficult"). */
|
gdb.base/signals.exp where it says "exceedingly difficult"). */
|
|
|
struct symtab_and_line sr_sal;
|
struct symtab_and_line sr_sal;
|
|
|
INIT_SAL (&sr_sal); /* initialize to zeroes */
|
INIT_SAL (&sr_sal); /* initialize to zeroes */
|
sr_sal.pc = prev_pc;
|
sr_sal.pc = prev_pc;
|
sr_sal.section = find_pc_overlay (sr_sal.pc);
|
sr_sal.section = find_pc_overlay (sr_sal.pc);
|
/* We perhaps could set the frame if we kept track of what the
|
/* We perhaps could set the frame if we kept track of what the
|
frame corresponding to prev_pc was. But we don't, so don't. */
|
frame corresponding to prev_pc was. But we don't, so don't. */
|
through_sigtramp_breakpoint =
|
through_sigtramp_breakpoint =
|
set_momentary_breakpoint (sr_sal, NULL, bp_through_sigtramp);
|
set_momentary_breakpoint (sr_sal, NULL, bp_through_sigtramp);
|
if (breakpoints_inserted)
|
if (breakpoints_inserted)
|
insert_breakpoints ();
|
insert_breakpoints ();
|
|
|
ecs->remove_breakpoints_on_following_step = 1;
|
ecs->remove_breakpoints_on_following_step = 1;
|
ecs->another_trap = 1;
|
ecs->another_trap = 1;
|
}
|
}
|
}
|
}
|
|
|
/* Subroutine call with source code we should not step over. Do step
|
/* Subroutine call with source code we should not step over. Do step
|
to the first line of code in it. */
|
to the first line of code in it. */
|
|
|
static void
|
static void
|
step_into_function (struct execution_control_state *ecs)
|
step_into_function (struct execution_control_state *ecs)
|
{
|
{
|
struct symtab *s;
|
struct symtab *s;
|
struct symtab_and_line sr_sal;
|
struct symtab_and_line sr_sal;
|
|
|
s = find_pc_symtab (stop_pc);
|
s = find_pc_symtab (stop_pc);
|
if (s && s->language != language_asm)
|
if (s && s->language != language_asm)
|
ecs->stop_func_start = SKIP_PROLOGUE (ecs->stop_func_start);
|
ecs->stop_func_start = SKIP_PROLOGUE (ecs->stop_func_start);
|
|
|
ecs->sal = find_pc_line (ecs->stop_func_start, 0);
|
ecs->sal = find_pc_line (ecs->stop_func_start, 0);
|
/* Use the step_resume_break to step until the end of the prologue,
|
/* Use the step_resume_break to step until the end of the prologue,
|
even if that involves jumps (as it seems to on the vax under
|
even if that involves jumps (as it seems to on the vax under
|
4.2). */
|
4.2). */
|
/* If the prologue ends in the middle of a source line, continue to
|
/* If the prologue ends in the middle of a source line, continue to
|
the end of that source line (if it is still within the function).
|
the end of that source line (if it is still within the function).
|
Otherwise, just go to end of prologue. */
|
Otherwise, just go to end of prologue. */
|
#ifdef PROLOGUE_FIRSTLINE_OVERLAP
|
#ifdef PROLOGUE_FIRSTLINE_OVERLAP
|
/* no, don't either. It skips any code that's legitimately on the
|
/* no, don't either. It skips any code that's legitimately on the
|
first line. */
|
first line. */
|
#else
|
#else
|
if (ecs->sal.end
|
if (ecs->sal.end
|
&& ecs->sal.pc != ecs->stop_func_start
|
&& ecs->sal.pc != ecs->stop_func_start
|
&& ecs->sal.end < ecs->stop_func_end)
|
&& ecs->sal.end < ecs->stop_func_end)
|
ecs->stop_func_start = ecs->sal.end;
|
ecs->stop_func_start = ecs->sal.end;
|
#endif
|
#endif
|
|
|
if (ecs->stop_func_start == stop_pc)
|
if (ecs->stop_func_start == stop_pc)
|
{
|
{
|
/* We are already there: stop now. */
|
/* We are already there: stop now. */
|
stop_step = 1;
|
stop_step = 1;
|
print_stop_reason (END_STEPPING_RANGE, 0);
|
print_stop_reason (END_STEPPING_RANGE, 0);
|
stop_stepping (ecs);
|
stop_stepping (ecs);
|
return;
|
return;
|
}
|
}
|
else
|
else
|
{
|
{
|
/* Put the step-breakpoint there and go until there. */
|
/* Put the step-breakpoint there and go until there. */
|
INIT_SAL (&sr_sal); /* initialize to zeroes */
|
INIT_SAL (&sr_sal); /* initialize to zeroes */
|
sr_sal.pc = ecs->stop_func_start;
|
sr_sal.pc = ecs->stop_func_start;
|
sr_sal.section = find_pc_overlay (ecs->stop_func_start);
|
sr_sal.section = find_pc_overlay (ecs->stop_func_start);
|
/* Do not specify what the fp should be when we stop since on
|
/* Do not specify what the fp should be when we stop since on
|
some machines the prologue is where the new fp value is
|
some machines the prologue is where the new fp value is
|
established. */
|
established. */
|
check_for_old_step_resume_breakpoint ();
|
check_for_old_step_resume_breakpoint ();
|
step_resume_breakpoint =
|
step_resume_breakpoint =
|
set_momentary_breakpoint (sr_sal, NULL, bp_step_resume);
|
set_momentary_breakpoint (sr_sal, NULL, bp_step_resume);
|
if (breakpoints_inserted)
|
if (breakpoints_inserted)
|
insert_breakpoints ();
|
insert_breakpoints ();
|
|
|
/* And make sure stepping stops right away then. */
|
/* And make sure stepping stops right away then. */
|
step_range_end = step_range_start;
|
step_range_end = step_range_start;
|
}
|
}
|
keep_going (ecs);
|
keep_going (ecs);
|
}
|
}
|
|
|
/* We've just entered a callee, and we wish to resume until it returns
|
/* We've just entered a callee, and we wish to resume until it returns
|
to the caller. Setting a step_resume breakpoint on the return
|
to the caller. Setting a step_resume breakpoint on the return
|
address will catch a return from the callee.
|
address will catch a return from the callee.
|
|
|
However, if the callee is recursing, we want to be careful not to
|
However, if the callee is recursing, we want to be careful not to
|
catch returns of those recursive calls, but only of THIS instance
|
catch returns of those recursive calls, but only of THIS instance
|
of the call.
|
of the call.
|
|
|
To do this, we set the step_resume bp's frame to our current
|
To do this, we set the step_resume bp's frame to our current
|
caller's frame (step_frame_address, which is set by the "next" or
|
caller's frame (step_frame_address, which is set by the "next" or
|
"until" command, before execution begins). */
|
"until" command, before execution begins). */
|
|
|
static void
|
static void
|
step_over_function (struct execution_control_state *ecs)
|
step_over_function (struct execution_control_state *ecs)
|
{
|
{
|
struct symtab_and_line sr_sal;
|
struct symtab_and_line sr_sal;
|
|
|
INIT_SAL (&sr_sal); /* initialize to zeros */
|
INIT_SAL (&sr_sal); /* initialize to zeros */
|
sr_sal.pc = ADDR_BITS_REMOVE (SAVED_PC_AFTER_CALL (get_current_frame ()));
|
sr_sal.pc = ADDR_BITS_REMOVE (SAVED_PC_AFTER_CALL (get_current_frame ()));
|
sr_sal.section = find_pc_overlay (sr_sal.pc);
|
sr_sal.section = find_pc_overlay (sr_sal.pc);
|
|
|
check_for_old_step_resume_breakpoint ();
|
check_for_old_step_resume_breakpoint ();
|
step_resume_breakpoint =
|
step_resume_breakpoint =
|
set_momentary_breakpoint (sr_sal, get_current_frame (), bp_step_resume);
|
set_momentary_breakpoint (sr_sal, get_current_frame (), bp_step_resume);
|
|
|
if (!IN_SOLIB_DYNSYM_RESOLVE_CODE (sr_sal.pc))
|
if (!IN_SOLIB_DYNSYM_RESOLVE_CODE (sr_sal.pc))
|
step_resume_breakpoint->frame = step_frame_address;
|
step_resume_breakpoint->frame = step_frame_address;
|
|
|
if (breakpoints_inserted)
|
if (breakpoints_inserted)
|
insert_breakpoints ();
|
insert_breakpoints ();
|
}
|
}
|
|
|
static void
|
static void
|
stop_stepping (struct execution_control_state *ecs)
|
stop_stepping (struct execution_control_state *ecs)
|
{
|
{
|
if (target_has_execution)
|
if (target_has_execution)
|
{
|
{
|
/* Are we stopping for a vfork event? We only stop when we see
|
/* Are we stopping for a vfork event? We only stop when we see
|
the child's event. However, we may not yet have seen the
|
the child's event. However, we may not yet have seen the
|
parent's event. And, inferior_pid is still set to the
|
parent's event. And, inferior_pid is still set to the
|
parent's pid, until we resume again and follow either the
|
parent's pid, until we resume again and follow either the
|
parent or child.
|
parent or child.
|
|
|
To ensure that we can really touch inferior_pid (aka, the
|
To ensure that we can really touch inferior_pid (aka, the
|
parent process) -- which calls to functions like read_pc
|
parent process) -- which calls to functions like read_pc
|
implicitly do -- wait on the parent if necessary. */
|
implicitly do -- wait on the parent if necessary. */
|
if ((pending_follow.kind == TARGET_WAITKIND_VFORKED)
|
if ((pending_follow.kind == TARGET_WAITKIND_VFORKED)
|
&& !pending_follow.fork_event.saw_parent_fork)
|
&& !pending_follow.fork_event.saw_parent_fork)
|
{
|
{
|
int parent_pid;
|
int parent_pid;
|
|
|
do
|
do
|
{
|
{
|
if (target_wait_hook)
|
if (target_wait_hook)
|
parent_pid = target_wait_hook (-1, &(ecs->ws));
|
parent_pid = target_wait_hook (-1, &(ecs->ws));
|
else
|
else
|
parent_pid = target_wait (-1, &(ecs->ws));
|
parent_pid = target_wait (-1, &(ecs->ws));
|
}
|
}
|
while (parent_pid != inferior_pid);
|
while (parent_pid != inferior_pid);
|
}
|
}
|
|
|
/* Assuming the inferior still exists, set these up for next
|
/* Assuming the inferior still exists, set these up for next
|
time, just like we did above if we didn't break out of the
|
time, just like we did above if we didn't break out of the
|
loop. */
|
loop. */
|
prev_pc = read_pc ();
|
prev_pc = read_pc ();
|
prev_func_start = ecs->stop_func_start;
|
prev_func_start = ecs->stop_func_start;
|
prev_func_name = ecs->stop_func_name;
|
prev_func_name = ecs->stop_func_name;
|
}
|
}
|
|
|
/* Let callers know we don't want to wait for the inferior anymore. */
|
/* Let callers know we don't want to wait for the inferior anymore. */
|
ecs->wait_some_more = 0;
|
ecs->wait_some_more = 0;
|
}
|
}
|
|
|
/* This function handles various cases where we need to continue
|
/* This function handles various cases where we need to continue
|
waiting for the inferior. */
|
waiting for the inferior. */
|
/* (Used to be the keep_going: label in the old wait_for_inferior) */
|
/* (Used to be the keep_going: label in the old wait_for_inferior) */
|
|
|
static void
|
static void
|
keep_going (struct execution_control_state *ecs)
|
keep_going (struct execution_control_state *ecs)
|
{
|
{
|
/* ??rehrauer: ttrace on HP-UX theoretically allows one to debug a
|
/* ??rehrauer: ttrace on HP-UX theoretically allows one to debug a
|
vforked child between its creation and subsequent exit or call to
|
vforked child between its creation and subsequent exit or call to
|
exec(). However, I had big problems in this rather creaky exec
|
exec(). However, I had big problems in this rather creaky exec
|
engine, getting that to work. The fundamental problem is that
|
engine, getting that to work. The fundamental problem is that
|
I'm trying to debug two processes via an engine that only
|
I'm trying to debug two processes via an engine that only
|
understands a single process with possibly multiple threads.
|
understands a single process with possibly multiple threads.
|
|
|
Hence, this spot is known to have problems when
|
Hence, this spot is known to have problems when
|
target_can_follow_vfork_prior_to_exec returns 1. */
|
target_can_follow_vfork_prior_to_exec returns 1. */
|
|
|
/* Save the pc before execution, to compare with pc after stop. */
|
/* Save the pc before execution, to compare with pc after stop. */
|
prev_pc = read_pc (); /* Might have been DECR_AFTER_BREAK */
|
prev_pc = read_pc (); /* Might have been DECR_AFTER_BREAK */
|
prev_func_start = ecs->stop_func_start; /* Ok, since if DECR_PC_AFTER
|
prev_func_start = ecs->stop_func_start; /* Ok, since if DECR_PC_AFTER
|
BREAK is defined, the
|
BREAK is defined, the
|
original pc would not have
|
original pc would not have
|
been at the start of a
|
been at the start of a
|
function. */
|
function. */
|
prev_func_name = ecs->stop_func_name;
|
prev_func_name = ecs->stop_func_name;
|
|
|
if (ecs->update_step_sp)
|
if (ecs->update_step_sp)
|
step_sp = read_sp ();
|
step_sp = read_sp ();
|
ecs->update_step_sp = 0;
|
ecs->update_step_sp = 0;
|
|
|
/* If we did not do break;, it means we should keep running the
|
/* If we did not do break;, it means we should keep running the
|
inferior and not return to debugger. */
|
inferior and not return to debugger. */
|
|
|
if (trap_expected && stop_signal != TARGET_SIGNAL_TRAP)
|
if (trap_expected && stop_signal != TARGET_SIGNAL_TRAP)
|
{
|
{
|
/* We took a signal (which we are supposed to pass through to
|
/* We took a signal (which we are supposed to pass through to
|
the inferior, else we'd have done a break above) and we
|
the inferior, else we'd have done a break above) and we
|
haven't yet gotten our trap. Simply continue. */
|
haven't yet gotten our trap. Simply continue. */
|
resume (currently_stepping (ecs), stop_signal);
|
resume (currently_stepping (ecs), stop_signal);
|
}
|
}
|
else
|
else
|
{
|
{
|
/* Either the trap was not expected, but we are continuing
|
/* Either the trap was not expected, but we are continuing
|
anyway (the user asked that this signal be passed to the
|
anyway (the user asked that this signal be passed to the
|
child)
|
child)
|
-- or --
|
-- or --
|
The signal was SIGTRAP, e.g. it was our signal, but we
|
The signal was SIGTRAP, e.g. it was our signal, but we
|
decided we should resume from it.
|
decided we should resume from it.
|
|
|
We're going to run this baby now!
|
We're going to run this baby now!
|
|
|
Insert breakpoints now, unless we are trying to one-proceed
|
Insert breakpoints now, unless we are trying to one-proceed
|
past a breakpoint. */
|
past a breakpoint. */
|
/* If we've just finished a special step resume and we don't
|
/* If we've just finished a special step resume and we don't
|
want to hit a breakpoint, pull em out. */
|
want to hit a breakpoint, pull em out. */
|
if (step_resume_breakpoint == NULL
|
if (step_resume_breakpoint == NULL
|
&& through_sigtramp_breakpoint == NULL
|
&& through_sigtramp_breakpoint == NULL
|
&& ecs->remove_breakpoints_on_following_step)
|
&& ecs->remove_breakpoints_on_following_step)
|
{
|
{
|
ecs->remove_breakpoints_on_following_step = 0;
|
ecs->remove_breakpoints_on_following_step = 0;
|
remove_breakpoints ();
|
remove_breakpoints ();
|
breakpoints_inserted = 0;
|
breakpoints_inserted = 0;
|
}
|
}
|
else if (!breakpoints_inserted &&
|
else if (!breakpoints_inserted &&
|
(through_sigtramp_breakpoint != NULL || !ecs->another_trap))
|
(through_sigtramp_breakpoint != NULL || !ecs->another_trap))
|
{
|
{
|
breakpoints_failed = insert_breakpoints ();
|
breakpoints_failed = insert_breakpoints ();
|
if (breakpoints_failed)
|
if (breakpoints_failed)
|
{
|
{
|
stop_stepping (ecs);
|
stop_stepping (ecs);
|
return;
|
return;
|
}
|
}
|
breakpoints_inserted = 1;
|
breakpoints_inserted = 1;
|
}
|
}
|
|
|
trap_expected = ecs->another_trap;
|
trap_expected = ecs->another_trap;
|
|
|
/* Do not deliver SIGNAL_TRAP (except when the user explicitly
|
/* Do not deliver SIGNAL_TRAP (except when the user explicitly
|
specifies that such a signal should be delivered to the
|
specifies that such a signal should be delivered to the
|
target program).
|
target program).
|
|
|
Typically, this would occure when a user is debugging a
|
Typically, this would occure when a user is debugging a
|
target monitor on a simulator: the target monitor sets a
|
target monitor on a simulator: the target monitor sets a
|
breakpoint; the simulator encounters this break-point and
|
breakpoint; the simulator encounters this break-point and
|
halts the simulation handing control to GDB; GDB, noteing
|
halts the simulation handing control to GDB; GDB, noteing
|
that the break-point isn't valid, returns control back to the
|
that the break-point isn't valid, returns control back to the
|
simulator; the simulator then delivers the hardware
|
simulator; the simulator then delivers the hardware
|
equivalent of a SIGNAL_TRAP to the program being debugged. */
|
equivalent of a SIGNAL_TRAP to the program being debugged. */
|
|
|
if (stop_signal == TARGET_SIGNAL_TRAP
|
if (stop_signal == TARGET_SIGNAL_TRAP
|
&& !signal_program[stop_signal])
|
&& !signal_program[stop_signal])
|
stop_signal = TARGET_SIGNAL_0;
|
stop_signal = TARGET_SIGNAL_0;
|
|
|
#ifdef SHIFT_INST_REGS
|
#ifdef SHIFT_INST_REGS
|
/* I'm not sure when this following segment applies. I do know,
|
/* I'm not sure when this following segment applies. I do know,
|
now, that we shouldn't rewrite the regs when we were stopped
|
now, that we shouldn't rewrite the regs when we were stopped
|
by a random signal from the inferior process. */
|
by a random signal from the inferior process. */
|
/* FIXME: Shouldn't this be based on the valid bit of the SXIP?
|
/* FIXME: Shouldn't this be based on the valid bit of the SXIP?
|
(this is only used on the 88k). */
|
(this is only used on the 88k). */
|
|
|
if (!bpstat_explains_signal (stop_bpstat)
|
if (!bpstat_explains_signal (stop_bpstat)
|
&& (stop_signal != TARGET_SIGNAL_CHLD)
|
&& (stop_signal != TARGET_SIGNAL_CHLD)
|
&& !stopped_by_random_signal)
|
&& !stopped_by_random_signal)
|
SHIFT_INST_REGS ();
|
SHIFT_INST_REGS ();
|
#endif /* SHIFT_INST_REGS */
|
#endif /* SHIFT_INST_REGS */
|
|
|
resume (currently_stepping (ecs), stop_signal);
|
resume (currently_stepping (ecs), stop_signal);
|
}
|
}
|
|
|
prepare_to_wait (ecs);
|
prepare_to_wait (ecs);
|
}
|
}
|
|
|
/* This function normally comes after a resume, before
|
/* This function normally comes after a resume, before
|
handle_inferior_event exits. It takes care of any last bits of
|
handle_inferior_event exits. It takes care of any last bits of
|
housekeeping, and sets the all-important wait_some_more flag. */
|
housekeeping, and sets the all-important wait_some_more flag. */
|
|
|
static void
|
static void
|
prepare_to_wait (struct execution_control_state *ecs)
|
prepare_to_wait (struct execution_control_state *ecs)
|
{
|
{
|
if (ecs->infwait_state == infwait_normal_state)
|
if (ecs->infwait_state == infwait_normal_state)
|
{
|
{
|
overlay_cache_invalid = 1;
|
overlay_cache_invalid = 1;
|
|
|
/* We have to invalidate the registers BEFORE calling
|
/* We have to invalidate the registers BEFORE calling
|
target_wait because they can be loaded from the target while
|
target_wait because they can be loaded from the target while
|
in target_wait. This makes remote debugging a bit more
|
in target_wait. This makes remote debugging a bit more
|
efficient for those targets that provide critical registers
|
efficient for those targets that provide critical registers
|
as part of their normal status mechanism. */
|
as part of their normal status mechanism. */
|
|
|
registers_changed ();
|
registers_changed ();
|
ecs->waiton_pid = -1;
|
ecs->waiton_pid = -1;
|
ecs->wp = &(ecs->ws);
|
ecs->wp = &(ecs->ws);
|
}
|
}
|
/* This is the old end of the while loop. Let everybody know we
|
/* This is the old end of the while loop. Let everybody know we
|
want to wait for the inferior some more and get called again
|
want to wait for the inferior some more and get called again
|
soon. */
|
soon. */
|
ecs->wait_some_more = 1;
|
ecs->wait_some_more = 1;
|
}
|
}
|
|
|
/* Print why the inferior has stopped. We always print something when
|
/* Print why the inferior has stopped. We always print something when
|
the inferior exits, or receives a signal. The rest of the cases are
|
the inferior exits, or receives a signal. The rest of the cases are
|
dealt with later on in normal_stop() and print_it_typical(). Ideally
|
dealt with later on in normal_stop() and print_it_typical(). Ideally
|
there should be a call to this function from handle_inferior_event()
|
there should be a call to this function from handle_inferior_event()
|
each time stop_stepping() is called.*/
|
each time stop_stepping() is called.*/
|
static void
|
static void
|
print_stop_reason (enum inferior_stop_reason stop_reason, int stop_info)
|
print_stop_reason (enum inferior_stop_reason stop_reason, int stop_info)
|
{
|
{
|
switch (stop_reason)
|
switch (stop_reason)
|
{
|
{
|
case STOP_UNKNOWN:
|
case STOP_UNKNOWN:
|
/* We don't deal with these cases from handle_inferior_event()
|
/* We don't deal with these cases from handle_inferior_event()
|
yet. */
|
yet. */
|
break;
|
break;
|
case END_STEPPING_RANGE:
|
case END_STEPPING_RANGE:
|
/* We are done with a step/next/si/ni command. */
|
/* We are done with a step/next/si/ni command. */
|
/* For now print nothing. */
|
/* For now print nothing. */
|
#ifdef UI_OUT
|
#ifdef UI_OUT
|
/* Print a message only if not in the middle of doing a "step n"
|
/* Print a message only if not in the middle of doing a "step n"
|
operation for n > 1 */
|
operation for n > 1 */
|
if (!step_multi || !stop_step)
|
if (!step_multi || !stop_step)
|
if (interpreter_p && strcmp (interpreter_p, "mi") == 0)
|
if (interpreter_p && strcmp (interpreter_p, "mi") == 0)
|
ui_out_field_string (uiout, "reason", "end-stepping-range");
|
ui_out_field_string (uiout, "reason", "end-stepping-range");
|
#endif
|
#endif
|
break;
|
break;
|
case BREAKPOINT_HIT:
|
case BREAKPOINT_HIT:
|
/* We found a breakpoint. */
|
/* We found a breakpoint. */
|
/* For now print nothing. */
|
/* For now print nothing. */
|
break;
|
break;
|
case SIGNAL_EXITED:
|
case SIGNAL_EXITED:
|
/* The inferior was terminated by a signal. */
|
/* The inferior was terminated by a signal. */
|
#ifdef UI_OUT
|
#ifdef UI_OUT
|
annotate_signalled ();
|
annotate_signalled ();
|
if (interpreter_p && strcmp (interpreter_p, "mi") == 0)
|
if (interpreter_p && strcmp (interpreter_p, "mi") == 0)
|
ui_out_field_string (uiout, "reason", "exited-signalled");
|
ui_out_field_string (uiout, "reason", "exited-signalled");
|
ui_out_text (uiout, "\nProgram terminated with signal ");
|
ui_out_text (uiout, "\nProgram terminated with signal ");
|
annotate_signal_name ();
|
annotate_signal_name ();
|
ui_out_field_string (uiout, "signal-name", target_signal_to_name (stop_info));
|
ui_out_field_string (uiout, "signal-name", target_signal_to_name (stop_info));
|
annotate_signal_name_end ();
|
annotate_signal_name_end ();
|
ui_out_text (uiout, ", ");
|
ui_out_text (uiout, ", ");
|
annotate_signal_string ();
|
annotate_signal_string ();
|
ui_out_field_string (uiout, "signal-meaning", target_signal_to_string (stop_info));
|
ui_out_field_string (uiout, "signal-meaning", target_signal_to_string (stop_info));
|
annotate_signal_string_end ();
|
annotate_signal_string_end ();
|
ui_out_text (uiout, ".\n");
|
ui_out_text (uiout, ".\n");
|
ui_out_text (uiout, "The program no longer exists.\n");
|
ui_out_text (uiout, "The program no longer exists.\n");
|
#else
|
#else
|
annotate_signalled ();
|
annotate_signalled ();
|
printf_filtered ("\nProgram terminated with signal ");
|
printf_filtered ("\nProgram terminated with signal ");
|
annotate_signal_name ();
|
annotate_signal_name ();
|
printf_filtered ("%s", target_signal_to_name (stop_info));
|
printf_filtered ("%s", target_signal_to_name (stop_info));
|
annotate_signal_name_end ();
|
annotate_signal_name_end ();
|
printf_filtered (", ");
|
printf_filtered (", ");
|
annotate_signal_string ();
|
annotate_signal_string ();
|
printf_filtered ("%s", target_signal_to_string (stop_info));
|
printf_filtered ("%s", target_signal_to_string (stop_info));
|
annotate_signal_string_end ();
|
annotate_signal_string_end ();
|
printf_filtered (".\n");
|
printf_filtered (".\n");
|
|
|
printf_filtered ("The program no longer exists.\n");
|
printf_filtered ("The program no longer exists.\n");
|
gdb_flush (gdb_stdout);
|
gdb_flush (gdb_stdout);
|
#endif
|
#endif
|
break;
|
break;
|
case EXITED:
|
case EXITED:
|
/* The inferior program is finished. */
|
/* The inferior program is finished. */
|
#ifdef UI_OUT
|
#ifdef UI_OUT
|
annotate_exited (stop_info);
|
annotate_exited (stop_info);
|
if (stop_info)
|
if (stop_info)
|
{
|
{
|
if (interpreter_p && strcmp (interpreter_p, "mi") == 0)
|
if (interpreter_p && strcmp (interpreter_p, "mi") == 0)
|
ui_out_field_string (uiout, "reason", "exited");
|
ui_out_field_string (uiout, "reason", "exited");
|
ui_out_text (uiout, "\nProgram exited with code ");
|
ui_out_text (uiout, "\nProgram exited with code ");
|
ui_out_field_fmt (uiout, "exit-code", "0%o", (unsigned int) stop_info);
|
ui_out_field_fmt (uiout, "exit-code", "0%o", (unsigned int) stop_info);
|
ui_out_text (uiout, ".\n");
|
ui_out_text (uiout, ".\n");
|
}
|
}
|
else
|
else
|
{
|
{
|
if (interpreter_p && strcmp (interpreter_p, "mi") == 0)
|
if (interpreter_p && strcmp (interpreter_p, "mi") == 0)
|
ui_out_field_string (uiout, "reason", "exited-normally");
|
ui_out_field_string (uiout, "reason", "exited-normally");
|
ui_out_text (uiout, "\nProgram exited normally.\n");
|
ui_out_text (uiout, "\nProgram exited normally.\n");
|
}
|
}
|
#else
|
#else
|
annotate_exited (stop_info);
|
annotate_exited (stop_info);
|
if (stop_info)
|
if (stop_info)
|
printf_filtered ("\nProgram exited with code 0%o.\n",
|
printf_filtered ("\nProgram exited with code 0%o.\n",
|
(unsigned int) stop_info);
|
(unsigned int) stop_info);
|
else
|
else
|
printf_filtered ("\nProgram exited normally.\n");
|
printf_filtered ("\nProgram exited normally.\n");
|
#endif
|
#endif
|
break;
|
break;
|
case SIGNAL_RECEIVED:
|
case SIGNAL_RECEIVED:
|
/* Signal received. The signal table tells us to print about
|
/* Signal received. The signal table tells us to print about
|
it. */
|
it. */
|
#ifdef UI_OUT
|
#ifdef UI_OUT
|
annotate_signal ();
|
annotate_signal ();
|
ui_out_text (uiout, "\nProgram received signal ");
|
ui_out_text (uiout, "\nProgram received signal ");
|
annotate_signal_name ();
|
annotate_signal_name ();
|
ui_out_field_string (uiout, "signal-name", target_signal_to_name (stop_info));
|
ui_out_field_string (uiout, "signal-name", target_signal_to_name (stop_info));
|
annotate_signal_name_end ();
|
annotate_signal_name_end ();
|
ui_out_text (uiout, ", ");
|
ui_out_text (uiout, ", ");
|
annotate_signal_string ();
|
annotate_signal_string ();
|
ui_out_field_string (uiout, "signal-meaning", target_signal_to_string (stop_info));
|
ui_out_field_string (uiout, "signal-meaning", target_signal_to_string (stop_info));
|
annotate_signal_string_end ();
|
annotate_signal_string_end ();
|
ui_out_text (uiout, ".\n");
|
ui_out_text (uiout, ".\n");
|
#else
|
#else
|
annotate_signal ();
|
annotate_signal ();
|
printf_filtered ("\nProgram received signal ");
|
printf_filtered ("\nProgram received signal ");
|
annotate_signal_name ();
|
annotate_signal_name ();
|
printf_filtered ("%s", target_signal_to_name (stop_info));
|
printf_filtered ("%s", target_signal_to_name (stop_info));
|
annotate_signal_name_end ();
|
annotate_signal_name_end ();
|
printf_filtered (", ");
|
printf_filtered (", ");
|
annotate_signal_string ();
|
annotate_signal_string ();
|
printf_filtered ("%s", target_signal_to_string (stop_info));
|
printf_filtered ("%s", target_signal_to_string (stop_info));
|
annotate_signal_string_end ();
|
annotate_signal_string_end ();
|
printf_filtered (".\n");
|
printf_filtered (".\n");
|
gdb_flush (gdb_stdout);
|
gdb_flush (gdb_stdout);
|
#endif
|
#endif
|
break;
|
break;
|
default:
|
default:
|
internal_error ("print_stop_reason: unrecognized enum value");
|
internal_error ("print_stop_reason: unrecognized enum value");
|
break;
|
break;
|
}
|
}
|
}
|
}
|
|
|
|
|
/* Here to return control to GDB when the inferior stops for real.
|
/* Here to return control to GDB when the inferior stops for real.
|
Print appropriate messages, remove breakpoints, give terminal our modes.
|
Print appropriate messages, remove breakpoints, give terminal our modes.
|
|
|
STOP_PRINT_FRAME nonzero means print the executing frame
|
STOP_PRINT_FRAME nonzero means print the executing frame
|
(pc, function, args, file, line number and line text).
|
(pc, function, args, file, line number and line text).
|
BREAKPOINTS_FAILED nonzero means stop was due to error
|
BREAKPOINTS_FAILED nonzero means stop was due to error
|
attempting to insert breakpoints. */
|
attempting to insert breakpoints. */
|
|
|
void
|
void
|
normal_stop (void)
|
normal_stop (void)
|
{
|
{
|
/* As with the notification of thread events, we want to delay
|
/* As with the notification of thread events, we want to delay
|
notifying the user that we've switched thread context until
|
notifying the user that we've switched thread context until
|
the inferior actually stops.
|
the inferior actually stops.
|
|
|
(Note that there's no point in saying anything if the inferior
|
(Note that there's no point in saying anything if the inferior
|
has exited!) */
|
has exited!) */
|
if ((previous_inferior_pid != inferior_pid)
|
if ((previous_inferior_pid != inferior_pid)
|
&& target_has_execution)
|
&& target_has_execution)
|
{
|
{
|
target_terminal_ours_for_output ();
|
target_terminal_ours_for_output ();
|
printf_filtered ("[Switching to %s]\n",
|
printf_filtered ("[Switching to %s]\n",
|
target_pid_or_tid_to_str (inferior_pid));
|
target_pid_or_tid_to_str (inferior_pid));
|
previous_inferior_pid = inferior_pid;
|
previous_inferior_pid = inferior_pid;
|
}
|
}
|
|
|
/* Make sure that the current_frame's pc is correct. This
|
/* Make sure that the current_frame's pc is correct. This
|
is a correction for setting up the frame info before doing
|
is a correction for setting up the frame info before doing
|
DECR_PC_AFTER_BREAK */
|
DECR_PC_AFTER_BREAK */
|
if (target_has_execution && get_current_frame ())
|
if (target_has_execution && get_current_frame ())
|
(get_current_frame ())->pc = read_pc ();
|
(get_current_frame ())->pc = read_pc ();
|
|
|
if (breakpoints_failed)
|
if (breakpoints_failed)
|
{
|
{
|
target_terminal_ours_for_output ();
|
target_terminal_ours_for_output ();
|
print_sys_errmsg ("While inserting breakpoints", breakpoints_failed);
|
print_sys_errmsg ("While inserting breakpoints", breakpoints_failed);
|
printf_filtered ("Stopped; cannot insert breakpoints.\n\
|
printf_filtered ("Stopped; cannot insert breakpoints.\n\
|
The same program may be running in another process,\n\
|
The same program may be running in another process,\n\
|
or you may have requested too many hardware breakpoints\n\
|
or you may have requested too many hardware breakpoints\n\
|
and/or watchpoints.\n");
|
and/or watchpoints.\n");
|
}
|
}
|
|
|
if (target_has_execution && breakpoints_inserted)
|
if (target_has_execution && breakpoints_inserted)
|
{
|
{
|
if (remove_breakpoints ())
|
if (remove_breakpoints ())
|
{
|
{
|
target_terminal_ours_for_output ();
|
target_terminal_ours_for_output ();
|
printf_filtered ("Cannot remove breakpoints because ");
|
printf_filtered ("Cannot remove breakpoints because ");
|
printf_filtered ("program is no longer writable.\n");
|
printf_filtered ("program is no longer writable.\n");
|
printf_filtered ("It might be running in another process.\n");
|
printf_filtered ("It might be running in another process.\n");
|
printf_filtered ("Further execution is probably impossible.\n");
|
printf_filtered ("Further execution is probably impossible.\n");
|
}
|
}
|
}
|
}
|
breakpoints_inserted = 0;
|
breakpoints_inserted = 0;
|
|
|
/* Delete the breakpoint we stopped at, if it wants to be deleted.
|
/* Delete the breakpoint we stopped at, if it wants to be deleted.
|
Delete any breakpoint that is to be deleted at the next stop. */
|
Delete any breakpoint that is to be deleted at the next stop. */
|
|
|
breakpoint_auto_delete (stop_bpstat);
|
breakpoint_auto_delete (stop_bpstat);
|
|
|
/* If an auto-display called a function and that got a signal,
|
/* If an auto-display called a function and that got a signal,
|
delete that auto-display to avoid an infinite recursion. */
|
delete that auto-display to avoid an infinite recursion. */
|
|
|
if (stopped_by_random_signal)
|
if (stopped_by_random_signal)
|
disable_current_display ();
|
disable_current_display ();
|
|
|
/* Don't print a message if in the middle of doing a "step n"
|
/* Don't print a message if in the middle of doing a "step n"
|
operation for n > 1 */
|
operation for n > 1 */
|
if (step_multi && stop_step)
|
if (step_multi && stop_step)
|
goto done;
|
goto done;
|
|
|
target_terminal_ours ();
|
target_terminal_ours ();
|
|
|
/* Look up the hook_stop and run it if it exists. */
|
/* Look up the hook_stop and run it if it exists. */
|
|
|
if (stop_command && stop_command->hook)
|
if (stop_command && stop_command->hook)
|
{
|
{
|
catch_errors (hook_stop_stub, stop_command->hook,
|
catch_errors (hook_stop_stub, stop_command->hook,
|
"Error while running hook_stop:\n", RETURN_MASK_ALL);
|
"Error while running hook_stop:\n", RETURN_MASK_ALL);
|
}
|
}
|
|
|
if (!target_has_stack)
|
if (!target_has_stack)
|
{
|
{
|
|
|
goto done;
|
goto done;
|
}
|
}
|
|
|
/* Select innermost stack frame - i.e., current frame is frame 0,
|
/* Select innermost stack frame - i.e., current frame is frame 0,
|
and current location is based on that.
|
and current location is based on that.
|
Don't do this on return from a stack dummy routine,
|
Don't do this on return from a stack dummy routine,
|
or if the program has exited. */
|
or if the program has exited. */
|
|
|
if (!stop_stack_dummy)
|
if (!stop_stack_dummy)
|
{
|
{
|
select_frame (get_current_frame (), 0);
|
select_frame (get_current_frame (), 0);
|
|
|
/* Print current location without a level number, if
|
/* Print current location without a level number, if
|
we have changed functions or hit a breakpoint.
|
we have changed functions or hit a breakpoint.
|
Print source line if we have one.
|
Print source line if we have one.
|
bpstat_print() contains the logic deciding in detail
|
bpstat_print() contains the logic deciding in detail
|
what to print, based on the event(s) that just occurred. */
|
what to print, based on the event(s) that just occurred. */
|
|
|
if (stop_print_frame
|
if (stop_print_frame
|
&& selected_frame)
|
&& selected_frame)
|
{
|
{
|
int bpstat_ret;
|
int bpstat_ret;
|
int source_flag;
|
int source_flag;
|
int do_frame_printing = 1;
|
int do_frame_printing = 1;
|
|
|
bpstat_ret = bpstat_print (stop_bpstat);
|
bpstat_ret = bpstat_print (stop_bpstat);
|
switch (bpstat_ret)
|
switch (bpstat_ret)
|
{
|
{
|
case PRINT_UNKNOWN:
|
case PRINT_UNKNOWN:
|
if (stop_step
|
if (stop_step
|
&& step_frame_address == FRAME_FP (get_current_frame ())
|
&& step_frame_address == FRAME_FP (get_current_frame ())
|
&& step_start_function == find_pc_function (stop_pc))
|
&& step_start_function == find_pc_function (stop_pc))
|
source_flag = SRC_LINE; /* finished step, just print source line */
|
source_flag = SRC_LINE; /* finished step, just print source line */
|
else
|
else
|
source_flag = SRC_AND_LOC; /* print location and source line */
|
source_flag = SRC_AND_LOC; /* print location and source line */
|
break;
|
break;
|
case PRINT_SRC_AND_LOC:
|
case PRINT_SRC_AND_LOC:
|
source_flag = SRC_AND_LOC; /* print location and source line */
|
source_flag = SRC_AND_LOC; /* print location and source line */
|
break;
|
break;
|
case PRINT_SRC_ONLY:
|
case PRINT_SRC_ONLY:
|
source_flag = SRC_LINE;
|
source_flag = SRC_LINE;
|
break;
|
break;
|
case PRINT_NOTHING:
|
case PRINT_NOTHING:
|
do_frame_printing = 0;
|
do_frame_printing = 0;
|
break;
|
break;
|
default:
|
default:
|
internal_error ("Unknown value.");
|
internal_error ("Unknown value.");
|
}
|
}
|
#ifdef UI_OUT
|
#ifdef UI_OUT
|
/* For mi, have the same behavior every time we stop:
|
/* For mi, have the same behavior every time we stop:
|
print everything but the source line. */
|
print everything but the source line. */
|
if (interpreter_p && strcmp (interpreter_p, "mi") == 0)
|
if (interpreter_p && strcmp (interpreter_p, "mi") == 0)
|
source_flag = LOC_AND_ADDRESS;
|
source_flag = LOC_AND_ADDRESS;
|
#endif
|
#endif
|
|
|
#ifdef UI_OUT
|
#ifdef UI_OUT
|
if (interpreter_p && strcmp (interpreter_p, "mi") == 0)
|
if (interpreter_p && strcmp (interpreter_p, "mi") == 0)
|
ui_out_field_int (uiout, "thread-id", pid_to_thread_id (inferior_pid));
|
ui_out_field_int (uiout, "thread-id", pid_to_thread_id (inferior_pid));
|
#endif
|
#endif
|
/* The behavior of this routine with respect to the source
|
/* The behavior of this routine with respect to the source
|
flag is:
|
flag is:
|
SRC_LINE: Print only source line
|
SRC_LINE: Print only source line
|
LOCATION: Print only location
|
LOCATION: Print only location
|
SRC_AND_LOC: Print location and source line */
|
SRC_AND_LOC: Print location and source line */
|
if (do_frame_printing)
|
if (do_frame_printing)
|
show_and_print_stack_frame (selected_frame, -1, source_flag);
|
show_and_print_stack_frame (selected_frame, -1, source_flag);
|
|
|
/* Display the auto-display expressions. */
|
/* Display the auto-display expressions. */
|
do_displays ();
|
do_displays ();
|
}
|
}
|
}
|
}
|
|
|
/* Save the function value return registers, if we care.
|
/* Save the function value return registers, if we care.
|
We might be about to restore their previous contents. */
|
We might be about to restore their previous contents. */
|
if (proceed_to_finish)
|
if (proceed_to_finish)
|
read_register_bytes (0, stop_registers, REGISTER_BYTES);
|
read_register_bytes (0, stop_registers, REGISTER_BYTES);
|
|
|
if (stop_stack_dummy)
|
if (stop_stack_dummy)
|
{
|
{
|
/* Pop the empty frame that contains the stack dummy.
|
/* Pop the empty frame that contains the stack dummy.
|
POP_FRAME ends with a setting of the current frame, so we
|
POP_FRAME ends with a setting of the current frame, so we
|
can use that next. */
|
can use that next. */
|
POP_FRAME;
|
POP_FRAME;
|
/* Set stop_pc to what it was before we called the function.
|
/* Set stop_pc to what it was before we called the function.
|
Can't rely on restore_inferior_status because that only gets
|
Can't rely on restore_inferior_status because that only gets
|
called if we don't stop in the called function. */
|
called if we don't stop in the called function. */
|
stop_pc = read_pc ();
|
stop_pc = read_pc ();
|
select_frame (get_current_frame (), 0);
|
select_frame (get_current_frame (), 0);
|
}
|
}
|
|
|
|
|
TUIDO (((TuiOpaqueFuncPtr) tui_vCheckDataValues, selected_frame));
|
TUIDO (((TuiOpaqueFuncPtr) tui_vCheckDataValues, selected_frame));
|
|
|
done:
|
done:
|
annotate_stopped ();
|
annotate_stopped ();
|
}
|
}
|
|
|
static int
|
static int
|
hook_stop_stub (void *cmd)
|
hook_stop_stub (void *cmd)
|
{
|
{
|
execute_user_command ((struct cmd_list_element *) cmd, 0);
|
execute_user_command ((struct cmd_list_element *) cmd, 0);
|
return (0);
|
return (0);
|
}
|
}
|
|
|
int
|
int
|
signal_stop_state (int signo)
|
signal_stop_state (int signo)
|
{
|
{
|
return signal_stop[signo];
|
return signal_stop[signo];
|
}
|
}
|
|
|
int
|
int
|
signal_print_state (int signo)
|
signal_print_state (int signo)
|
{
|
{
|
return signal_print[signo];
|
return signal_print[signo];
|
}
|
}
|
|
|
int
|
int
|
signal_pass_state (int signo)
|
signal_pass_state (int signo)
|
{
|
{
|
return signal_program[signo];
|
return signal_program[signo];
|
}
|
}
|
|
|
int signal_stop_update (signo, state)
|
int signal_stop_update (signo, state)
|
int signo;
|
int signo;
|
int state;
|
int state;
|
{
|
{
|
int ret = signal_stop[signo];
|
int ret = signal_stop[signo];
|
signal_stop[signo] = state;
|
signal_stop[signo] = state;
|
return ret;
|
return ret;
|
}
|
}
|
|
|
int signal_print_update (signo, state)
|
int signal_print_update (signo, state)
|
int signo;
|
int signo;
|
int state;
|
int state;
|
{
|
{
|
int ret = signal_print[signo];
|
int ret = signal_print[signo];
|
signal_print[signo] = state;
|
signal_print[signo] = state;
|
return ret;
|
return ret;
|
}
|
}
|
|
|
int signal_pass_update (signo, state)
|
int signal_pass_update (signo, state)
|
int signo;
|
int signo;
|
int state;
|
int state;
|
{
|
{
|
int ret = signal_program[signo];
|
int ret = signal_program[signo];
|
signal_program[signo] = state;
|
signal_program[signo] = state;
|
return ret;
|
return ret;
|
}
|
}
|
|
|
static void
|
static void
|
sig_print_header (void)
|
sig_print_header (void)
|
{
|
{
|
printf_filtered ("\
|
printf_filtered ("\
|
Signal Stop\tPrint\tPass to program\tDescription\n");
|
Signal Stop\tPrint\tPass to program\tDescription\n");
|
}
|
}
|
|
|
static void
|
static void
|
sig_print_info (enum target_signal oursig)
|
sig_print_info (enum target_signal oursig)
|
{
|
{
|
char *name = target_signal_to_name (oursig);
|
char *name = target_signal_to_name (oursig);
|
int name_padding = 13 - strlen (name);
|
int name_padding = 13 - strlen (name);
|
|
|
if (name_padding <= 0)
|
if (name_padding <= 0)
|
name_padding = 0;
|
name_padding = 0;
|
|
|
printf_filtered ("%s", name);
|
printf_filtered ("%s", name);
|
printf_filtered ("%*.*s ", name_padding, name_padding,
|
printf_filtered ("%*.*s ", name_padding, name_padding,
|
" ");
|
" ");
|
printf_filtered ("%s\t", signal_stop[oursig] ? "Yes" : "No");
|
printf_filtered ("%s\t", signal_stop[oursig] ? "Yes" : "No");
|
printf_filtered ("%s\t", signal_print[oursig] ? "Yes" : "No");
|
printf_filtered ("%s\t", signal_print[oursig] ? "Yes" : "No");
|
printf_filtered ("%s\t\t", signal_program[oursig] ? "Yes" : "No");
|
printf_filtered ("%s\t\t", signal_program[oursig] ? "Yes" : "No");
|
printf_filtered ("%s\n", target_signal_to_string (oursig));
|
printf_filtered ("%s\n", target_signal_to_string (oursig));
|
}
|
}
|
|
|
/* Specify how various signals in the inferior should be handled. */
|
/* Specify how various signals in the inferior should be handled. */
|
|
|
static void
|
static void
|
handle_command (char *args, int from_tty)
|
handle_command (char *args, int from_tty)
|
{
|
{
|
char **argv;
|
char **argv;
|
int digits, wordlen;
|
int digits, wordlen;
|
int sigfirst, signum, siglast;
|
int sigfirst, signum, siglast;
|
enum target_signal oursig;
|
enum target_signal oursig;
|
int allsigs;
|
int allsigs;
|
int nsigs;
|
int nsigs;
|
unsigned char *sigs;
|
unsigned char *sigs;
|
struct cleanup *old_chain;
|
struct cleanup *old_chain;
|
|
|
if (args == NULL)
|
if (args == NULL)
|
{
|
{
|
error_no_arg ("signal to handle");
|
error_no_arg ("signal to handle");
|
}
|
}
|
|
|
/* Allocate and zero an array of flags for which signals to handle. */
|
/* Allocate and zero an array of flags for which signals to handle. */
|
|
|
nsigs = (int) TARGET_SIGNAL_LAST;
|
nsigs = (int) TARGET_SIGNAL_LAST;
|
sigs = (unsigned char *) alloca (nsigs);
|
sigs = (unsigned char *) alloca (nsigs);
|
memset (sigs, 0, nsigs);
|
memset (sigs, 0, nsigs);
|
|
|
/* Break the command line up into args. */
|
/* Break the command line up into args. */
|
|
|
argv = buildargv (args);
|
argv = buildargv (args);
|
if (argv == NULL)
|
if (argv == NULL)
|
{
|
{
|
nomem (0);
|
nomem (0);
|
}
|
}
|
old_chain = make_cleanup_freeargv (argv);
|
old_chain = make_cleanup_freeargv (argv);
|
|
|
/* Walk through the args, looking for signal oursigs, signal names, and
|
/* Walk through the args, looking for signal oursigs, signal names, and
|
actions. Signal numbers and signal names may be interspersed with
|
actions. Signal numbers and signal names may be interspersed with
|
actions, with the actions being performed for all signals cumulatively
|
actions, with the actions being performed for all signals cumulatively
|
specified. Signal ranges can be specified as <LOW>-<HIGH>. */
|
specified. Signal ranges can be specified as <LOW>-<HIGH>. */
|
|
|
while (*argv != NULL)
|
while (*argv != NULL)
|
{
|
{
|
wordlen = strlen (*argv);
|
wordlen = strlen (*argv);
|
for (digits = 0; isdigit ((*argv)[digits]); digits++)
|
for (digits = 0; isdigit ((*argv)[digits]); digits++)
|
{;
|
{;
|
}
|
}
|
allsigs = 0;
|
allsigs = 0;
|
sigfirst = siglast = -1;
|
sigfirst = siglast = -1;
|
|
|
if (wordlen >= 1 && !strncmp (*argv, "all", wordlen))
|
if (wordlen >= 1 && !strncmp (*argv, "all", wordlen))
|
{
|
{
|
/* Apply action to all signals except those used by the
|
/* Apply action to all signals except those used by the
|
debugger. Silently skip those. */
|
debugger. Silently skip those. */
|
allsigs = 1;
|
allsigs = 1;
|
sigfirst = 0;
|
sigfirst = 0;
|
siglast = nsigs - 1;
|
siglast = nsigs - 1;
|
}
|
}
|
else if (wordlen >= 1 && !strncmp (*argv, "stop", wordlen))
|
else if (wordlen >= 1 && !strncmp (*argv, "stop", wordlen))
|
{
|
{
|
SET_SIGS (nsigs, sigs, signal_stop);
|
SET_SIGS (nsigs, sigs, signal_stop);
|
SET_SIGS (nsigs, sigs, signal_print);
|
SET_SIGS (nsigs, sigs, signal_print);
|
}
|
}
|
else if (wordlen >= 1 && !strncmp (*argv, "ignore", wordlen))
|
else if (wordlen >= 1 && !strncmp (*argv, "ignore", wordlen))
|
{
|
{
|
UNSET_SIGS (nsigs, sigs, signal_program);
|
UNSET_SIGS (nsigs, sigs, signal_program);
|
}
|
}
|
else if (wordlen >= 2 && !strncmp (*argv, "print", wordlen))
|
else if (wordlen >= 2 && !strncmp (*argv, "print", wordlen))
|
{
|
{
|
SET_SIGS (nsigs, sigs, signal_print);
|
SET_SIGS (nsigs, sigs, signal_print);
|
}
|
}
|
else if (wordlen >= 2 && !strncmp (*argv, "pass", wordlen))
|
else if (wordlen >= 2 && !strncmp (*argv, "pass", wordlen))
|
{
|
{
|
SET_SIGS (nsigs, sigs, signal_program);
|
SET_SIGS (nsigs, sigs, signal_program);
|
}
|
}
|
else if (wordlen >= 3 && !strncmp (*argv, "nostop", wordlen))
|
else if (wordlen >= 3 && !strncmp (*argv, "nostop", wordlen))
|
{
|
{
|
UNSET_SIGS (nsigs, sigs, signal_stop);
|
UNSET_SIGS (nsigs, sigs, signal_stop);
|
}
|
}
|
else if (wordlen >= 3 && !strncmp (*argv, "noignore", wordlen))
|
else if (wordlen >= 3 && !strncmp (*argv, "noignore", wordlen))
|
{
|
{
|
SET_SIGS (nsigs, sigs, signal_program);
|
SET_SIGS (nsigs, sigs, signal_program);
|
}
|
}
|
else if (wordlen >= 4 && !strncmp (*argv, "noprint", wordlen))
|
else if (wordlen >= 4 && !strncmp (*argv, "noprint", wordlen))
|
{
|
{
|
UNSET_SIGS (nsigs, sigs, signal_print);
|
UNSET_SIGS (nsigs, sigs, signal_print);
|
UNSET_SIGS (nsigs, sigs, signal_stop);
|
UNSET_SIGS (nsigs, sigs, signal_stop);
|
}
|
}
|
else if (wordlen >= 4 && !strncmp (*argv, "nopass", wordlen))
|
else if (wordlen >= 4 && !strncmp (*argv, "nopass", wordlen))
|
{
|
{
|
UNSET_SIGS (nsigs, sigs, signal_program);
|
UNSET_SIGS (nsigs, sigs, signal_program);
|
}
|
}
|
else if (digits > 0)
|
else if (digits > 0)
|
{
|
{
|
/* It is numeric. The numeric signal refers to our own
|
/* It is numeric. The numeric signal refers to our own
|
internal signal numbering from target.h, not to host/target
|
internal signal numbering from target.h, not to host/target
|
signal number. This is a feature; users really should be
|
signal number. This is a feature; users really should be
|
using symbolic names anyway, and the common ones like
|
using symbolic names anyway, and the common ones like
|
SIGHUP, SIGINT, SIGALRM, etc. will work right anyway. */
|
SIGHUP, SIGINT, SIGALRM, etc. will work right anyway. */
|
|
|
sigfirst = siglast = (int)
|
sigfirst = siglast = (int)
|
target_signal_from_command (atoi (*argv));
|
target_signal_from_command (atoi (*argv));
|
if ((*argv)[digits] == '-')
|
if ((*argv)[digits] == '-')
|
{
|
{
|
siglast = (int)
|
siglast = (int)
|
target_signal_from_command (atoi ((*argv) + digits + 1));
|
target_signal_from_command (atoi ((*argv) + digits + 1));
|
}
|
}
|
if (sigfirst > siglast)
|
if (sigfirst > siglast)
|
{
|
{
|
/* Bet he didn't figure we'd think of this case... */
|
/* Bet he didn't figure we'd think of this case... */
|
signum = sigfirst;
|
signum = sigfirst;
|
sigfirst = siglast;
|
sigfirst = siglast;
|
siglast = signum;
|
siglast = signum;
|
}
|
}
|
}
|
}
|
else
|
else
|
{
|
{
|
oursig = target_signal_from_name (*argv);
|
oursig = target_signal_from_name (*argv);
|
if (oursig != TARGET_SIGNAL_UNKNOWN)
|
if (oursig != TARGET_SIGNAL_UNKNOWN)
|
{
|
{
|
sigfirst = siglast = (int) oursig;
|
sigfirst = siglast = (int) oursig;
|
}
|
}
|
else
|
else
|
{
|
{
|
/* Not a number and not a recognized flag word => complain. */
|
/* Not a number and not a recognized flag word => complain. */
|
error ("Unrecognized or ambiguous flag word: \"%s\".", *argv);
|
error ("Unrecognized or ambiguous flag word: \"%s\".", *argv);
|
}
|
}
|
}
|
}
|
|
|
/* If any signal numbers or symbol names were found, set flags for
|
/* If any signal numbers or symbol names were found, set flags for
|
which signals to apply actions to. */
|
which signals to apply actions to. */
|
|
|
for (signum = sigfirst; signum >= 0 && signum <= siglast; signum++)
|
for (signum = sigfirst; signum >= 0 && signum <= siglast; signum++)
|
{
|
{
|
switch ((enum target_signal) signum)
|
switch ((enum target_signal) signum)
|
{
|
{
|
case TARGET_SIGNAL_TRAP:
|
case TARGET_SIGNAL_TRAP:
|
case TARGET_SIGNAL_INT:
|
case TARGET_SIGNAL_INT:
|
if (!allsigs && !sigs[signum])
|
if (!allsigs && !sigs[signum])
|
{
|
{
|
if (query ("%s is used by the debugger.\n\
|
if (query ("%s is used by the debugger.\n\
|
Are you sure you want to change it? ",
|
Are you sure you want to change it? ",
|
target_signal_to_name
|
target_signal_to_name
|
((enum target_signal) signum)))
|
((enum target_signal) signum)))
|
{
|
{
|
sigs[signum] = 1;
|
sigs[signum] = 1;
|
}
|
}
|
else
|
else
|
{
|
{
|
printf_unfiltered ("Not confirmed, unchanged.\n");
|
printf_unfiltered ("Not confirmed, unchanged.\n");
|
gdb_flush (gdb_stdout);
|
gdb_flush (gdb_stdout);
|
}
|
}
|
}
|
}
|
break;
|
break;
|
case TARGET_SIGNAL_0:
|
case TARGET_SIGNAL_0:
|
case TARGET_SIGNAL_DEFAULT:
|
case TARGET_SIGNAL_DEFAULT:
|
case TARGET_SIGNAL_UNKNOWN:
|
case TARGET_SIGNAL_UNKNOWN:
|
/* Make sure that "all" doesn't print these. */
|
/* Make sure that "all" doesn't print these. */
|
break;
|
break;
|
default:
|
default:
|
sigs[signum] = 1;
|
sigs[signum] = 1;
|
break;
|
break;
|
}
|
}
|
}
|
}
|
|
|
argv++;
|
argv++;
|
}
|
}
|
|
|
target_notice_signals (inferior_pid);
|
target_notice_signals (inferior_pid);
|
|
|
if (from_tty)
|
if (from_tty)
|
{
|
{
|
/* Show the results. */
|
/* Show the results. */
|
sig_print_header ();
|
sig_print_header ();
|
for (signum = 0; signum < nsigs; signum++)
|
for (signum = 0; signum < nsigs; signum++)
|
{
|
{
|
if (sigs[signum])
|
if (sigs[signum])
|
{
|
{
|
sig_print_info (signum);
|
sig_print_info (signum);
|
}
|
}
|
}
|
}
|
}
|
}
|
|
|
do_cleanups (old_chain);
|
do_cleanups (old_chain);
|
}
|
}
|
|
|
static void
|
static void
|
xdb_handle_command (char *args, int from_tty)
|
xdb_handle_command (char *args, int from_tty)
|
{
|
{
|
char **argv;
|
char **argv;
|
struct cleanup *old_chain;
|
struct cleanup *old_chain;
|
|
|
/* Break the command line up into args. */
|
/* Break the command line up into args. */
|
|
|
argv = buildargv (args);
|
argv = buildargv (args);
|
if (argv == NULL)
|
if (argv == NULL)
|
{
|
{
|
nomem (0);
|
nomem (0);
|
}
|
}
|
old_chain = make_cleanup_freeargv (argv);
|
old_chain = make_cleanup_freeargv (argv);
|
if (argv[1] != (char *) NULL)
|
if (argv[1] != (char *) NULL)
|
{
|
{
|
char *argBuf;
|
char *argBuf;
|
int bufLen;
|
int bufLen;
|
|
|
bufLen = strlen (argv[0]) + 20;
|
bufLen = strlen (argv[0]) + 20;
|
argBuf = (char *) xmalloc (bufLen);
|
argBuf = (char *) xmalloc (bufLen);
|
if (argBuf)
|
if (argBuf)
|
{
|
{
|
int validFlag = 1;
|
int validFlag = 1;
|
enum target_signal oursig;
|
enum target_signal oursig;
|
|
|
oursig = target_signal_from_name (argv[0]);
|
oursig = target_signal_from_name (argv[0]);
|
memset (argBuf, 0, bufLen);
|
memset (argBuf, 0, bufLen);
|
if (strcmp (argv[1], "Q") == 0)
|
if (strcmp (argv[1], "Q") == 0)
|
sprintf (argBuf, "%s %s", argv[0], "noprint");
|
sprintf (argBuf, "%s %s", argv[0], "noprint");
|
else
|
else
|
{
|
{
|
if (strcmp (argv[1], "s") == 0)
|
if (strcmp (argv[1], "s") == 0)
|
{
|
{
|
if (!signal_stop[oursig])
|
if (!signal_stop[oursig])
|
sprintf (argBuf, "%s %s", argv[0], "stop");
|
sprintf (argBuf, "%s %s", argv[0], "stop");
|
else
|
else
|
sprintf (argBuf, "%s %s", argv[0], "nostop");
|
sprintf (argBuf, "%s %s", argv[0], "nostop");
|
}
|
}
|
else if (strcmp (argv[1], "i") == 0)
|
else if (strcmp (argv[1], "i") == 0)
|
{
|
{
|
if (!signal_program[oursig])
|
if (!signal_program[oursig])
|
sprintf (argBuf, "%s %s", argv[0], "pass");
|
sprintf (argBuf, "%s %s", argv[0], "pass");
|
else
|
else
|
sprintf (argBuf, "%s %s", argv[0], "nopass");
|
sprintf (argBuf, "%s %s", argv[0], "nopass");
|
}
|
}
|
else if (strcmp (argv[1], "r") == 0)
|
else if (strcmp (argv[1], "r") == 0)
|
{
|
{
|
if (!signal_print[oursig])
|
if (!signal_print[oursig])
|
sprintf (argBuf, "%s %s", argv[0], "print");
|
sprintf (argBuf, "%s %s", argv[0], "print");
|
else
|
else
|
sprintf (argBuf, "%s %s", argv[0], "noprint");
|
sprintf (argBuf, "%s %s", argv[0], "noprint");
|
}
|
}
|
else
|
else
|
validFlag = 0;
|
validFlag = 0;
|
}
|
}
|
if (validFlag)
|
if (validFlag)
|
handle_command (argBuf, from_tty);
|
handle_command (argBuf, from_tty);
|
else
|
else
|
printf_filtered ("Invalid signal handling flag.\n");
|
printf_filtered ("Invalid signal handling flag.\n");
|
if (argBuf)
|
if (argBuf)
|
free (argBuf);
|
free (argBuf);
|
}
|
}
|
}
|
}
|
do_cleanups (old_chain);
|
do_cleanups (old_chain);
|
}
|
}
|
|
|
/* Print current contents of the tables set by the handle command.
|
/* Print current contents of the tables set by the handle command.
|
It is possible we should just be printing signals actually used
|
It is possible we should just be printing signals actually used
|
by the current target (but for things to work right when switching
|
by the current target (but for things to work right when switching
|
targets, all signals should be in the signal tables). */
|
targets, all signals should be in the signal tables). */
|
|
|
static void
|
static void
|
signals_info (char *signum_exp, int from_tty)
|
signals_info (char *signum_exp, int from_tty)
|
{
|
{
|
enum target_signal oursig;
|
enum target_signal oursig;
|
sig_print_header ();
|
sig_print_header ();
|
|
|
if (signum_exp)
|
if (signum_exp)
|
{
|
{
|
/* First see if this is a symbol name. */
|
/* First see if this is a symbol name. */
|
oursig = target_signal_from_name (signum_exp);
|
oursig = target_signal_from_name (signum_exp);
|
if (oursig == TARGET_SIGNAL_UNKNOWN)
|
if (oursig == TARGET_SIGNAL_UNKNOWN)
|
{
|
{
|
/* No, try numeric. */
|
/* No, try numeric. */
|
oursig =
|
oursig =
|
target_signal_from_command (parse_and_eval_address (signum_exp));
|
target_signal_from_command (parse_and_eval_address (signum_exp));
|
}
|
}
|
sig_print_info (oursig);
|
sig_print_info (oursig);
|
return;
|
return;
|
}
|
}
|
|
|
printf_filtered ("\n");
|
printf_filtered ("\n");
|
/* These ugly casts brought to you by the native VAX compiler. */
|
/* These ugly casts brought to you by the native VAX compiler. */
|
for (oursig = TARGET_SIGNAL_FIRST;
|
for (oursig = TARGET_SIGNAL_FIRST;
|
(int) oursig < (int) TARGET_SIGNAL_LAST;
|
(int) oursig < (int) TARGET_SIGNAL_LAST;
|
oursig = (enum target_signal) ((int) oursig + 1))
|
oursig = (enum target_signal) ((int) oursig + 1))
|
{
|
{
|
QUIT;
|
QUIT;
|
|
|
if (oursig != TARGET_SIGNAL_UNKNOWN
|
if (oursig != TARGET_SIGNAL_UNKNOWN
|
&& oursig != TARGET_SIGNAL_DEFAULT
|
&& oursig != TARGET_SIGNAL_DEFAULT
|
&& oursig != TARGET_SIGNAL_0)
|
&& oursig != TARGET_SIGNAL_0)
|
sig_print_info (oursig);
|
sig_print_info (oursig);
|
}
|
}
|
|
|
printf_filtered ("\nUse the \"handle\" command to change these tables.\n");
|
printf_filtered ("\nUse the \"handle\" command to change these tables.\n");
|
}
|
}
|
|
|
struct inferior_status
|
struct inferior_status
|
{
|
{
|
enum target_signal stop_signal;
|
enum target_signal stop_signal;
|
CORE_ADDR stop_pc;
|
CORE_ADDR stop_pc;
|
bpstat stop_bpstat;
|
bpstat stop_bpstat;
|
int stop_step;
|
int stop_step;
|
int stop_stack_dummy;
|
int stop_stack_dummy;
|
int stopped_by_random_signal;
|
int stopped_by_random_signal;
|
int trap_expected;
|
int trap_expected;
|
CORE_ADDR step_range_start;
|
CORE_ADDR step_range_start;
|
CORE_ADDR step_range_end;
|
CORE_ADDR step_range_end;
|
CORE_ADDR step_frame_address;
|
CORE_ADDR step_frame_address;
|
int step_over_calls;
|
int step_over_calls;
|
CORE_ADDR step_resume_break_address;
|
CORE_ADDR step_resume_break_address;
|
int stop_after_trap;
|
int stop_after_trap;
|
int stop_soon_quietly;
|
int stop_soon_quietly;
|
CORE_ADDR selected_frame_address;
|
CORE_ADDR selected_frame_address;
|
char *stop_registers;
|
char *stop_registers;
|
|
|
/* These are here because if call_function_by_hand has written some
|
/* These are here because if call_function_by_hand has written some
|
registers and then decides to call error(), we better not have changed
|
registers and then decides to call error(), we better not have changed
|
any registers. */
|
any registers. */
|
char *registers;
|
char *registers;
|
|
|
int selected_level;
|
int selected_level;
|
int breakpoint_proceeded;
|
int breakpoint_proceeded;
|
int restore_stack_info;
|
int restore_stack_info;
|
int proceed_to_finish;
|
int proceed_to_finish;
|
};
|
};
|
|
|
static struct inferior_status *
|
static struct inferior_status *
|
xmalloc_inferior_status (void)
|
xmalloc_inferior_status (void)
|
{
|
{
|
struct inferior_status *inf_status;
|
struct inferior_status *inf_status;
|
inf_status = xmalloc (sizeof (struct inferior_status));
|
inf_status = xmalloc (sizeof (struct inferior_status));
|
inf_status->stop_registers = xmalloc (REGISTER_BYTES);
|
inf_status->stop_registers = xmalloc (REGISTER_BYTES);
|
inf_status->registers = xmalloc (REGISTER_BYTES);
|
inf_status->registers = xmalloc (REGISTER_BYTES);
|
return inf_status;
|
return inf_status;
|
}
|
}
|
|
|
static void
|
static void
|
free_inferior_status (struct inferior_status *inf_status)
|
free_inferior_status (struct inferior_status *inf_status)
|
{
|
{
|
free (inf_status->registers);
|
free (inf_status->registers);
|
free (inf_status->stop_registers);
|
free (inf_status->stop_registers);
|
free (inf_status);
|
free (inf_status);
|
}
|
}
|
|
|
void
|
void
|
write_inferior_status_register (struct inferior_status *inf_status, int regno,
|
write_inferior_status_register (struct inferior_status *inf_status, int regno,
|
LONGEST val)
|
LONGEST val)
|
{
|
{
|
int size = REGISTER_RAW_SIZE (regno);
|
int size = REGISTER_RAW_SIZE (regno);
|
void *buf = alloca (size);
|
void *buf = alloca (size);
|
store_signed_integer (buf, size, val);
|
store_signed_integer (buf, size, val);
|
memcpy (&inf_status->registers[REGISTER_BYTE (regno)], buf, size);
|
memcpy (&inf_status->registers[REGISTER_BYTE (regno)], buf, size);
|
}
|
}
|
|
|
/* Save all of the information associated with the inferior<==>gdb
|
/* Save all of the information associated with the inferior<==>gdb
|
connection. INF_STATUS is a pointer to a "struct inferior_status"
|
connection. INF_STATUS is a pointer to a "struct inferior_status"
|
(defined in inferior.h). */
|
(defined in inferior.h). */
|
|
|
struct inferior_status *
|
struct inferior_status *
|
save_inferior_status (int restore_stack_info)
|
save_inferior_status (int restore_stack_info)
|
{
|
{
|
struct inferior_status *inf_status = xmalloc_inferior_status ();
|
struct inferior_status *inf_status = xmalloc_inferior_status ();
|
|
|
inf_status->stop_signal = stop_signal;
|
inf_status->stop_signal = stop_signal;
|
inf_status->stop_pc = stop_pc;
|
inf_status->stop_pc = stop_pc;
|
inf_status->stop_step = stop_step;
|
inf_status->stop_step = stop_step;
|
inf_status->stop_stack_dummy = stop_stack_dummy;
|
inf_status->stop_stack_dummy = stop_stack_dummy;
|
inf_status->stopped_by_random_signal = stopped_by_random_signal;
|
inf_status->stopped_by_random_signal = stopped_by_random_signal;
|
inf_status->trap_expected = trap_expected;
|
inf_status->trap_expected = trap_expected;
|
inf_status->step_range_start = step_range_start;
|
inf_status->step_range_start = step_range_start;
|
inf_status->step_range_end = step_range_end;
|
inf_status->step_range_end = step_range_end;
|
inf_status->step_frame_address = step_frame_address;
|
inf_status->step_frame_address = step_frame_address;
|
inf_status->step_over_calls = step_over_calls;
|
inf_status->step_over_calls = step_over_calls;
|
inf_status->stop_after_trap = stop_after_trap;
|
inf_status->stop_after_trap = stop_after_trap;
|
inf_status->stop_soon_quietly = stop_soon_quietly;
|
inf_status->stop_soon_quietly = stop_soon_quietly;
|
/* Save original bpstat chain here; replace it with copy of chain.
|
/* Save original bpstat chain here; replace it with copy of chain.
|
If caller's caller is walking the chain, they'll be happier if we
|
If caller's caller is walking the chain, they'll be happier if we
|
hand them back the original chain when restore_inferior_status is
|
hand them back the original chain when restore_inferior_status is
|
called. */
|
called. */
|
inf_status->stop_bpstat = stop_bpstat;
|
inf_status->stop_bpstat = stop_bpstat;
|
stop_bpstat = bpstat_copy (stop_bpstat);
|
stop_bpstat = bpstat_copy (stop_bpstat);
|
inf_status->breakpoint_proceeded = breakpoint_proceeded;
|
inf_status->breakpoint_proceeded = breakpoint_proceeded;
|
inf_status->restore_stack_info = restore_stack_info;
|
inf_status->restore_stack_info = restore_stack_info;
|
inf_status->proceed_to_finish = proceed_to_finish;
|
inf_status->proceed_to_finish = proceed_to_finish;
|
|
|
memcpy (inf_status->stop_registers, stop_registers, REGISTER_BYTES);
|
memcpy (inf_status->stop_registers, stop_registers, REGISTER_BYTES);
|
|
|
read_register_bytes (0, inf_status->registers, REGISTER_BYTES);
|
read_register_bytes (0, inf_status->registers, REGISTER_BYTES);
|
|
|
record_selected_frame (&(inf_status->selected_frame_address),
|
record_selected_frame (&(inf_status->selected_frame_address),
|
&(inf_status->selected_level));
|
&(inf_status->selected_level));
|
return inf_status;
|
return inf_status;
|
}
|
}
|
|
|
struct restore_selected_frame_args
|
struct restore_selected_frame_args
|
{
|
{
|
CORE_ADDR frame_address;
|
CORE_ADDR frame_address;
|
int level;
|
int level;
|
};
|
};
|
|
|
static int
|
static int
|
restore_selected_frame (void *args)
|
restore_selected_frame (void *args)
|
{
|
{
|
struct restore_selected_frame_args *fr =
|
struct restore_selected_frame_args *fr =
|
(struct restore_selected_frame_args *) args;
|
(struct restore_selected_frame_args *) args;
|
struct frame_info *frame;
|
struct frame_info *frame;
|
int level = fr->level;
|
int level = fr->level;
|
|
|
frame = find_relative_frame (get_current_frame (), &level);
|
frame = find_relative_frame (get_current_frame (), &level);
|
|
|
/* If inf_status->selected_frame_address is NULL, there was no
|
/* If inf_status->selected_frame_address is NULL, there was no
|
previously selected frame. */
|
previously selected frame. */
|
if (frame == NULL ||
|
if (frame == NULL ||
|
/* FRAME_FP (frame) != fr->frame_address || */
|
/* FRAME_FP (frame) != fr->frame_address || */
|
/* elz: deleted this check as a quick fix to the problem that
|
/* elz: deleted this check as a quick fix to the problem that
|
for function called by hand gdb creates no internal frame
|
for function called by hand gdb creates no internal frame
|
structure and the real stack and gdb's idea of stack are
|
structure and the real stack and gdb's idea of stack are
|
different if nested calls by hands are made.
|
different if nested calls by hands are made.
|
|
|
mvs: this worries me. */
|
mvs: this worries me. */
|
level != 0)
|
level != 0)
|
{
|
{
|
warning ("Unable to restore previously selected frame.\n");
|
warning ("Unable to restore previously selected frame.\n");
|
return 0;
|
return 0;
|
}
|
}
|
|
|
select_frame (frame, fr->level);
|
select_frame (frame, fr->level);
|
|
|
return (1);
|
return (1);
|
}
|
}
|
|
|
void
|
void
|
restore_inferior_status (struct inferior_status *inf_status)
|
restore_inferior_status (struct inferior_status *inf_status)
|
{
|
{
|
stop_signal = inf_status->stop_signal;
|
stop_signal = inf_status->stop_signal;
|
stop_pc = inf_status->stop_pc;
|
stop_pc = inf_status->stop_pc;
|
stop_step = inf_status->stop_step;
|
stop_step = inf_status->stop_step;
|
stop_stack_dummy = inf_status->stop_stack_dummy;
|
stop_stack_dummy = inf_status->stop_stack_dummy;
|
stopped_by_random_signal = inf_status->stopped_by_random_signal;
|
stopped_by_random_signal = inf_status->stopped_by_random_signal;
|
trap_expected = inf_status->trap_expected;
|
trap_expected = inf_status->trap_expected;
|
step_range_start = inf_status->step_range_start;
|
step_range_start = inf_status->step_range_start;
|
step_range_end = inf_status->step_range_end;
|
step_range_end = inf_status->step_range_end;
|
step_frame_address = inf_status->step_frame_address;
|
step_frame_address = inf_status->step_frame_address;
|
step_over_calls = inf_status->step_over_calls;
|
step_over_calls = inf_status->step_over_calls;
|
stop_after_trap = inf_status->stop_after_trap;
|
stop_after_trap = inf_status->stop_after_trap;
|
stop_soon_quietly = inf_status->stop_soon_quietly;
|
stop_soon_quietly = inf_status->stop_soon_quietly;
|
bpstat_clear (&stop_bpstat);
|
bpstat_clear (&stop_bpstat);
|
stop_bpstat = inf_status->stop_bpstat;
|
stop_bpstat = inf_status->stop_bpstat;
|
breakpoint_proceeded = inf_status->breakpoint_proceeded;
|
breakpoint_proceeded = inf_status->breakpoint_proceeded;
|
proceed_to_finish = inf_status->proceed_to_finish;
|
proceed_to_finish = inf_status->proceed_to_finish;
|
|
|
/* FIXME: Is the restore of stop_registers always needed */
|
/* FIXME: Is the restore of stop_registers always needed */
|
memcpy (stop_registers, inf_status->stop_registers, REGISTER_BYTES);
|
memcpy (stop_registers, inf_status->stop_registers, REGISTER_BYTES);
|
|
|
/* The inferior can be gone if the user types "print exit(0)"
|
/* The inferior can be gone if the user types "print exit(0)"
|
(and perhaps other times). */
|
(and perhaps other times). */
|
if (target_has_execution)
|
if (target_has_execution)
|
write_register_bytes (0, inf_status->registers, REGISTER_BYTES);
|
write_register_bytes (0, inf_status->registers, REGISTER_BYTES);
|
|
|
/* FIXME: If we are being called after stopping in a function which
|
/* FIXME: If we are being called after stopping in a function which
|
is called from gdb, we should not be trying to restore the
|
is called from gdb, we should not be trying to restore the
|
selected frame; it just prints a spurious error message (The
|
selected frame; it just prints a spurious error message (The
|
message is useful, however, in detecting bugs in gdb (like if gdb
|
message is useful, however, in detecting bugs in gdb (like if gdb
|
clobbers the stack)). In fact, should we be restoring the
|
clobbers the stack)). In fact, should we be restoring the
|
inferior status at all in that case? . */
|
inferior status at all in that case? . */
|
|
|
if (target_has_stack && inf_status->restore_stack_info)
|
if (target_has_stack && inf_status->restore_stack_info)
|
{
|
{
|
struct restore_selected_frame_args fr;
|
struct restore_selected_frame_args fr;
|
fr.level = inf_status->selected_level;
|
fr.level = inf_status->selected_level;
|
fr.frame_address = inf_status->selected_frame_address;
|
fr.frame_address = inf_status->selected_frame_address;
|
/* The point of catch_errors is that if the stack is clobbered,
|
/* The point of catch_errors is that if the stack is clobbered,
|
walking the stack might encounter a garbage pointer and error()
|
walking the stack might encounter a garbage pointer and error()
|
trying to dereference it. */
|
trying to dereference it. */
|
if (catch_errors (restore_selected_frame, &fr,
|
if (catch_errors (restore_selected_frame, &fr,
|
"Unable to restore previously selected frame:\n",
|
"Unable to restore previously selected frame:\n",
|
RETURN_MASK_ERROR) == 0)
|
RETURN_MASK_ERROR) == 0)
|
/* Error in restoring the selected frame. Select the innermost
|
/* Error in restoring the selected frame. Select the innermost
|
frame. */
|
frame. */
|
|
|
|
|
select_frame (get_current_frame (), 0);
|
select_frame (get_current_frame (), 0);
|
|
|
}
|
}
|
|
|
free_inferior_status (inf_status);
|
free_inferior_status (inf_status);
|
}
|
}
|
|
|
void
|
void
|
discard_inferior_status (struct inferior_status *inf_status)
|
discard_inferior_status (struct inferior_status *inf_status)
|
{
|
{
|
/* See save_inferior_status for info on stop_bpstat. */
|
/* See save_inferior_status for info on stop_bpstat. */
|
bpstat_clear (&inf_status->stop_bpstat);
|
bpstat_clear (&inf_status->stop_bpstat);
|
free_inferior_status (inf_status);
|
free_inferior_status (inf_status);
|
}
|
}
|
|
|
static void
|
static void
|
set_follow_fork_mode_command (char *arg, int from_tty,
|
set_follow_fork_mode_command (char *arg, int from_tty,
|
struct cmd_list_element *c)
|
struct cmd_list_element *c)
|
{
|
{
|
if (!STREQ (arg, "parent") &&
|
if (!STREQ (arg, "parent") &&
|
!STREQ (arg, "child") &&
|
!STREQ (arg, "child") &&
|
!STREQ (arg, "both") &&
|
!STREQ (arg, "both") &&
|
!STREQ (arg, "ask"))
|
!STREQ (arg, "ask"))
|
error ("follow-fork-mode must be one of \"parent\", \"child\", \"both\" or \"ask\".");
|
error ("follow-fork-mode must be one of \"parent\", \"child\", \"both\" or \"ask\".");
|
|
|
if (follow_fork_mode_string != NULL)
|
if (follow_fork_mode_string != NULL)
|
free (follow_fork_mode_string);
|
free (follow_fork_mode_string);
|
follow_fork_mode_string = savestring (arg, strlen (arg));
|
follow_fork_mode_string = savestring (arg, strlen (arg));
|
}
|
}
|
|
|
static void
|
static void
|
build_infrun (void)
|
build_infrun (void)
|
{
|
{
|
stop_registers = xmalloc (REGISTER_BYTES);
|
stop_registers = xmalloc (REGISTER_BYTES);
|
}
|
}
|
|
|
void
|
void
|
_initialize_infrun (void)
|
_initialize_infrun (void)
|
{
|
{
|
register int i;
|
register int i;
|
register int numsigs;
|
register int numsigs;
|
struct cmd_list_element *c;
|
struct cmd_list_element *c;
|
|
|
build_infrun ();
|
build_infrun ();
|
|
|
register_gdbarch_swap (&stop_registers, sizeof (stop_registers), NULL);
|
register_gdbarch_swap (&stop_registers, sizeof (stop_registers), NULL);
|
register_gdbarch_swap (NULL, 0, build_infrun);
|
register_gdbarch_swap (NULL, 0, build_infrun);
|
|
|
add_info ("signals", signals_info,
|
add_info ("signals", signals_info,
|
"What debugger does when program gets various signals.\n\
|
"What debugger does when program gets various signals.\n\
|
Specify a signal as argument to print info on that signal only.");
|
Specify a signal as argument to print info on that signal only.");
|
add_info_alias ("handle", "signals", 0);
|
add_info_alias ("handle", "signals", 0);
|
|
|
add_com ("handle", class_run, handle_command,
|
add_com ("handle", class_run, handle_command,
|
concat ("Specify how to handle a signal.\n\
|
concat ("Specify how to handle a signal.\n\
|
Args are signals and actions to apply to those signals.\n\
|
Args are signals and actions to apply to those signals.\n\
|
Symbolic signals (e.g. SIGSEGV) are recommended but numeric signals\n\
|
Symbolic signals (e.g. SIGSEGV) are recommended but numeric signals\n\
|
from 1-15 are allowed for compatibility with old versions of GDB.\n\
|
from 1-15 are allowed for compatibility with old versions of GDB.\n\
|
Numeric ranges may be specified with the form LOW-HIGH (e.g. 1-5).\n\
|
Numeric ranges may be specified with the form LOW-HIGH (e.g. 1-5).\n\
|
The special arg \"all\" is recognized to mean all signals except those\n\
|
The special arg \"all\" is recognized to mean all signals except those\n\
|
used by the debugger, typically SIGTRAP and SIGINT.\n",
|
used by the debugger, typically SIGTRAP and SIGINT.\n",
|
"Recognized actions include \"stop\", \"nostop\", \"print\", \"noprint\",\n\
|
"Recognized actions include \"stop\", \"nostop\", \"print\", \"noprint\",\n\
|
\"pass\", \"nopass\", \"ignore\", or \"noignore\".\n\
|
\"pass\", \"nopass\", \"ignore\", or \"noignore\".\n\
|
Stop means reenter debugger if this signal happens (implies print).\n\
|
Stop means reenter debugger if this signal happens (implies print).\n\
|
Print means print a message if this signal happens.\n\
|
Print means print a message if this signal happens.\n\
|
Pass means let program see this signal; otherwise program doesn't know.\n\
|
Pass means let program see this signal; otherwise program doesn't know.\n\
|
Ignore is a synonym for nopass and noignore is a synonym for pass.\n\
|
Ignore is a synonym for nopass and noignore is a synonym for pass.\n\
|
Pass and Stop may be combined.", NULL));
|
Pass and Stop may be combined.", NULL));
|
if (xdb_commands)
|
if (xdb_commands)
|
{
|
{
|
add_com ("lz", class_info, signals_info,
|
add_com ("lz", class_info, signals_info,
|
"What debugger does when program gets various signals.\n\
|
"What debugger does when program gets various signals.\n\
|
Specify a signal as argument to print info on that signal only.");
|
Specify a signal as argument to print info on that signal only.");
|
add_com ("z", class_run, xdb_handle_command,
|
add_com ("z", class_run, xdb_handle_command,
|
concat ("Specify how to handle a signal.\n\
|
concat ("Specify how to handle a signal.\n\
|
Args are signals and actions to apply to those signals.\n\
|
Args are signals and actions to apply to those signals.\n\
|
Symbolic signals (e.g. SIGSEGV) are recommended but numeric signals\n\
|
Symbolic signals (e.g. SIGSEGV) are recommended but numeric signals\n\
|
from 1-15 are allowed for compatibility with old versions of GDB.\n\
|
from 1-15 are allowed for compatibility with old versions of GDB.\n\
|
Numeric ranges may be specified with the form LOW-HIGH (e.g. 1-5).\n\
|
Numeric ranges may be specified with the form LOW-HIGH (e.g. 1-5).\n\
|
The special arg \"all\" is recognized to mean all signals except those\n\
|
The special arg \"all\" is recognized to mean all signals except those\n\
|
used by the debugger, typically SIGTRAP and SIGINT.\n",
|
used by the debugger, typically SIGTRAP and SIGINT.\n",
|
"Recognized actions include \"s\" (toggles between stop and nostop), \n\
|
"Recognized actions include \"s\" (toggles between stop and nostop), \n\
|
\"r\" (toggles between print and noprint), \"i\" (toggles between pass and \
|
\"r\" (toggles between print and noprint), \"i\" (toggles between pass and \
|
nopass), \"Q\" (noprint)\n\
|
nopass), \"Q\" (noprint)\n\
|
Stop means reenter debugger if this signal happens (implies print).\n\
|
Stop means reenter debugger if this signal happens (implies print).\n\
|
Print means print a message if this signal happens.\n\
|
Print means print a message if this signal happens.\n\
|
Pass means let program see this signal; otherwise program doesn't know.\n\
|
Pass means let program see this signal; otherwise program doesn't know.\n\
|
Ignore is a synonym for nopass and noignore is a synonym for pass.\n\
|
Ignore is a synonym for nopass and noignore is a synonym for pass.\n\
|
Pass and Stop may be combined.", NULL));
|
Pass and Stop may be combined.", NULL));
|
}
|
}
|
|
|
if (!dbx_commands)
|
if (!dbx_commands)
|
stop_command = add_cmd ("stop", class_obscure, not_just_help_class_command,
|
stop_command = add_cmd ("stop", class_obscure, not_just_help_class_command,
|
"There is no `stop' command, but you can set a hook on `stop'.\n\
|
"There is no `stop' command, but you can set a hook on `stop'.\n\
|
This allows you to set a list of commands to be run each time execution\n\
|
This allows you to set a list of commands to be run each time execution\n\
|
of the program stops.", &cmdlist);
|
of the program stops.", &cmdlist);
|
|
|
numsigs = (int) TARGET_SIGNAL_LAST;
|
numsigs = (int) TARGET_SIGNAL_LAST;
|
signal_stop = (unsigned char *)
|
signal_stop = (unsigned char *)
|
xmalloc (sizeof (signal_stop[0]) * numsigs);
|
xmalloc (sizeof (signal_stop[0]) * numsigs);
|
signal_print = (unsigned char *)
|
signal_print = (unsigned char *)
|
xmalloc (sizeof (signal_print[0]) * numsigs);
|
xmalloc (sizeof (signal_print[0]) * numsigs);
|
signal_program = (unsigned char *)
|
signal_program = (unsigned char *)
|
xmalloc (sizeof (signal_program[0]) * numsigs);
|
xmalloc (sizeof (signal_program[0]) * numsigs);
|
for (i = 0; i < numsigs; i++)
|
for (i = 0; i < numsigs; i++)
|
{
|
{
|
signal_stop[i] = 1;
|
signal_stop[i] = 1;
|
signal_print[i] = 1;
|
signal_print[i] = 1;
|
signal_program[i] = 1;
|
signal_program[i] = 1;
|
}
|
}
|
|
|
/* Signals caused by debugger's own actions
|
/* Signals caused by debugger's own actions
|
should not be given to the program afterwards. */
|
should not be given to the program afterwards. */
|
signal_program[TARGET_SIGNAL_TRAP] = 0;
|
signal_program[TARGET_SIGNAL_TRAP] = 0;
|
signal_program[TARGET_SIGNAL_INT] = 0;
|
signal_program[TARGET_SIGNAL_INT] = 0;
|
|
|
/* Signals that are not errors should not normally enter the debugger. */
|
/* Signals that are not errors should not normally enter the debugger. */
|
signal_stop[TARGET_SIGNAL_ALRM] = 0;
|
signal_stop[TARGET_SIGNAL_ALRM] = 0;
|
signal_print[TARGET_SIGNAL_ALRM] = 0;
|
signal_print[TARGET_SIGNAL_ALRM] = 0;
|
signal_stop[TARGET_SIGNAL_VTALRM] = 0;
|
signal_stop[TARGET_SIGNAL_VTALRM] = 0;
|
signal_print[TARGET_SIGNAL_VTALRM] = 0;
|
signal_print[TARGET_SIGNAL_VTALRM] = 0;
|
signal_stop[TARGET_SIGNAL_PROF] = 0;
|
signal_stop[TARGET_SIGNAL_PROF] = 0;
|
signal_print[TARGET_SIGNAL_PROF] = 0;
|
signal_print[TARGET_SIGNAL_PROF] = 0;
|
signal_stop[TARGET_SIGNAL_CHLD] = 0;
|
signal_stop[TARGET_SIGNAL_CHLD] = 0;
|
signal_print[TARGET_SIGNAL_CHLD] = 0;
|
signal_print[TARGET_SIGNAL_CHLD] = 0;
|
signal_stop[TARGET_SIGNAL_IO] = 0;
|
signal_stop[TARGET_SIGNAL_IO] = 0;
|
signal_print[TARGET_SIGNAL_IO] = 0;
|
signal_print[TARGET_SIGNAL_IO] = 0;
|
signal_stop[TARGET_SIGNAL_POLL] = 0;
|
signal_stop[TARGET_SIGNAL_POLL] = 0;
|
signal_print[TARGET_SIGNAL_POLL] = 0;
|
signal_print[TARGET_SIGNAL_POLL] = 0;
|
signal_stop[TARGET_SIGNAL_URG] = 0;
|
signal_stop[TARGET_SIGNAL_URG] = 0;
|
signal_print[TARGET_SIGNAL_URG] = 0;
|
signal_print[TARGET_SIGNAL_URG] = 0;
|
signal_stop[TARGET_SIGNAL_WINCH] = 0;
|
signal_stop[TARGET_SIGNAL_WINCH] = 0;
|
signal_print[TARGET_SIGNAL_WINCH] = 0;
|
signal_print[TARGET_SIGNAL_WINCH] = 0;
|
|
|
/* These signals are used internally by user-level thread
|
/* These signals are used internally by user-level thread
|
implementations. (See signal(5) on Solaris.) Like the above
|
implementations. (See signal(5) on Solaris.) Like the above
|
signals, a healthy program receives and handles them as part of
|
signals, a healthy program receives and handles them as part of
|
its normal operation. */
|
its normal operation. */
|
signal_stop[TARGET_SIGNAL_LWP] = 0;
|
signal_stop[TARGET_SIGNAL_LWP] = 0;
|
signal_print[TARGET_SIGNAL_LWP] = 0;
|
signal_print[TARGET_SIGNAL_LWP] = 0;
|
signal_stop[TARGET_SIGNAL_WAITING] = 0;
|
signal_stop[TARGET_SIGNAL_WAITING] = 0;
|
signal_print[TARGET_SIGNAL_WAITING] = 0;
|
signal_print[TARGET_SIGNAL_WAITING] = 0;
|
signal_stop[TARGET_SIGNAL_CANCEL] = 0;
|
signal_stop[TARGET_SIGNAL_CANCEL] = 0;
|
signal_print[TARGET_SIGNAL_CANCEL] = 0;
|
signal_print[TARGET_SIGNAL_CANCEL] = 0;
|
|
|
#ifdef SOLIB_ADD
|
#ifdef SOLIB_ADD
|
add_show_from_set
|
add_show_from_set
|
(add_set_cmd ("stop-on-solib-events", class_support, var_zinteger,
|
(add_set_cmd ("stop-on-solib-events", class_support, var_zinteger,
|
(char *) &stop_on_solib_events,
|
(char *) &stop_on_solib_events,
|
"Set stopping for shared library events.\n\
|
"Set stopping for shared library events.\n\
|
If nonzero, gdb will give control to the user when the dynamic linker\n\
|
If nonzero, gdb will give control to the user when the dynamic linker\n\
|
notifies gdb of shared library events. The most common event of interest\n\
|
notifies gdb of shared library events. The most common event of interest\n\
|
to the user would be loading/unloading of a new library.\n",
|
to the user would be loading/unloading of a new library.\n",
|
&setlist),
|
&setlist),
|
&showlist);
|
&showlist);
|
#endif
|
#endif
|
|
|
c = add_set_enum_cmd ("follow-fork-mode",
|
c = add_set_enum_cmd ("follow-fork-mode",
|
class_run,
|
class_run,
|
follow_fork_mode_kind_names,
|
follow_fork_mode_kind_names,
|
(char *) &follow_fork_mode_string,
|
(char *) &follow_fork_mode_string,
|
/* ??rehrauer: The "both" option is broken, by what may be a 10.20
|
/* ??rehrauer: The "both" option is broken, by what may be a 10.20
|
kernel problem. It's also not terribly useful without a GUI to
|
kernel problem. It's also not terribly useful without a GUI to
|
help the user drive two debuggers. So for now, I'm disabling
|
help the user drive two debuggers. So for now, I'm disabling
|
the "both" option. */
|
the "both" option. */
|
/* "Set debugger response to a program call of fork \
|
/* "Set debugger response to a program call of fork \
|
or vfork.\n\
|
or vfork.\n\
|
A fork or vfork creates a new process. follow-fork-mode can be:\n\
|
A fork or vfork creates a new process. follow-fork-mode can be:\n\
|
parent - the original process is debugged after a fork\n\
|
parent - the original process is debugged after a fork\n\
|
child - the new process is debugged after a fork\n\
|
child - the new process is debugged after a fork\n\
|
both - both the parent and child are debugged after a fork\n\
|
both - both the parent and child are debugged after a fork\n\
|
ask - the debugger will ask for one of the above choices\n\
|
ask - the debugger will ask for one of the above choices\n\
|
For \"both\", another copy of the debugger will be started to follow\n\
|
For \"both\", another copy of the debugger will be started to follow\n\
|
the new child process. The original debugger will continue to follow\n\
|
the new child process. The original debugger will continue to follow\n\
|
the original parent process. To distinguish their prompts, the\n\
|
the original parent process. To distinguish their prompts, the\n\
|
debugger copy's prompt will be changed.\n\
|
debugger copy's prompt will be changed.\n\
|
For \"parent\" or \"child\", the unfollowed process will run free.\n\
|
For \"parent\" or \"child\", the unfollowed process will run free.\n\
|
By default, the debugger will follow the parent process.",
|
By default, the debugger will follow the parent process.",
|
*/
|
*/
|
"Set debugger response to a program call of fork \
|
"Set debugger response to a program call of fork \
|
or vfork.\n\
|
or vfork.\n\
|
A fork or vfork creates a new process. follow-fork-mode can be:\n\
|
A fork or vfork creates a new process. follow-fork-mode can be:\n\
|
parent - the original process is debugged after a fork\n\
|
parent - the original process is debugged after a fork\n\
|
child - the new process is debugged after a fork\n\
|
child - the new process is debugged after a fork\n\
|
ask - the debugger will ask for one of the above choices\n\
|
ask - the debugger will ask for one of the above choices\n\
|
For \"parent\" or \"child\", the unfollowed process will run free.\n\
|
For \"parent\" or \"child\", the unfollowed process will run free.\n\
|
By default, the debugger will follow the parent process.",
|
By default, the debugger will follow the parent process.",
|
&setlist);
|
&setlist);
|
/* c->function.sfunc = ; */
|
/* c->function.sfunc = ; */
|
add_show_from_set (c, &showlist);
|
add_show_from_set (c, &showlist);
|
|
|
set_follow_fork_mode_command ("parent", 0, NULL);
|
set_follow_fork_mode_command ("parent", 0, NULL);
|
|
|
c = add_set_enum_cmd ("scheduler-locking", class_run,
|
c = add_set_enum_cmd ("scheduler-locking", class_run,
|
scheduler_enums, /* array of string names */
|
scheduler_enums, /* array of string names */
|
(char *) &scheduler_mode, /* current mode */
|
(char *) &scheduler_mode, /* current mode */
|
"Set mode for locking scheduler during execution.\n\
|
"Set mode for locking scheduler during execution.\n\
|
off == no locking (threads may preempt at any time)\n\
|
off == no locking (threads may preempt at any time)\n\
|
on == full locking (no thread except the current thread may run)\n\
|
on == full locking (no thread except the current thread may run)\n\
|
step == scheduler locked during every single-step operation.\n\
|
step == scheduler locked during every single-step operation.\n\
|
In this mode, no other thread may run during a step command.\n\
|
In this mode, no other thread may run during a step command.\n\
|
Other threads may run while stepping over a function call ('next').",
|
Other threads may run while stepping over a function call ('next').",
|
&setlist);
|
&setlist);
|
|
|
c->function.sfunc = set_schedlock_func; /* traps on target vector */
|
c->function.sfunc = set_schedlock_func; /* traps on target vector */
|
add_show_from_set (c, &showlist);
|
add_show_from_set (c, &showlist);
|
}
|
}
|
|
|
