/* Target-struct-independent code to start (run) and stop an inferior
|
/* Target-struct-independent code to start (run) and stop an inferior
|
process.
|
process.
|
|
|
Copyright (C) 1986, 1987, 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995,
|
Copyright (C) 1986, 1987, 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995,
|
1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007,
|
1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007,
|
2008 Free Software Foundation, Inc.
|
2008 Free Software Foundation, Inc.
|
|
|
This file is part of GDB.
|
This file is part of GDB.
|
|
|
This program is free software; you can redistribute it and/or modify
|
This program is free software; you can redistribute it and/or modify
|
it under the terms of the GNU General Public License as published by
|
it under the terms of the GNU General Public License as published by
|
the Free Software Foundation; either version 3 of the License, or
|
the Free Software Foundation; either version 3 of the License, or
|
(at your option) any later version.
|
(at your option) any later version.
|
|
|
This program is distributed in the hope that it will be useful,
|
This program is distributed in the hope that it will be useful,
|
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
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
GNU General Public License for more details.
|
GNU General Public License for more details.
|
|
|
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, see <http://www.gnu.org/licenses/>. */
|
along with this program. If not, see <http://www.gnu.org/licenses/>. */
|
|
|
#include "defs.h"
|
#include "defs.h"
|
#include "gdb_string.h"
|
#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"
|
#include "inferior.h"
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#include "inferior.h"
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#include "exceptions.h"
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#include "exceptions.h"
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#include "breakpoint.h"
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#include "breakpoint.h"
|
#include "gdb_wait.h"
|
#include "gdb_wait.h"
|
#include "gdbcore.h"
|
#include "gdbcore.h"
|
#include "gdbcmd.h"
|
#include "gdbcmd.h"
|
#include "cli/cli-script.h"
|
#include "cli/cli-script.h"
|
#include "target.h"
|
#include "target.h"
|
#include "gdbthread.h"
|
#include "gdbthread.h"
|
#include "annotate.h"
|
#include "annotate.h"
|
#include "symfile.h"
|
#include "symfile.h"
|
#include "top.h"
|
#include "top.h"
|
#include <signal.h>
|
#include <signal.h>
|
#include "inf-loop.h"
|
#include "inf-loop.h"
|
#include "regcache.h"
|
#include "regcache.h"
|
#include "value.h"
|
#include "value.h"
|
#include "observer.h"
|
#include "observer.h"
|
#include "language.h"
|
#include "language.h"
|
#include "solib.h"
|
#include "solib.h"
|
#include "main.h"
|
#include "main.h"
|
|
|
#include "gdb_assert.h"
|
#include "gdb_assert.h"
|
#include "mi/mi-common.h"
|
#include "mi/mi-common.h"
|
|
|
/* Prototypes for local functions */
|
/* Prototypes for local functions */
|
|
|
static void signals_info (char *, int);
|
static void signals_info (char *, int);
|
|
|
static void handle_command (char *, int);
|
static void handle_command (char *, int);
|
|
|
static void sig_print_info (enum target_signal);
|
static void sig_print_info (enum target_signal);
|
|
|
static void sig_print_header (void);
|
static void sig_print_header (void);
|
|
|
static void resume_cleanups (void *);
|
static void resume_cleanups (void *);
|
|
|
static int hook_stop_stub (void *);
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static int hook_stop_stub (void *);
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|
|
static int restore_selected_frame (void *);
|
static int restore_selected_frame (void *);
|
|
|
static void build_infrun (void);
|
static void build_infrun (void);
|
|
|
static int follow_fork (void);
|
static int follow_fork (void);
|
|
|
static void set_schedlock_func (char *args, int from_tty,
|
static void set_schedlock_func (char *args, int from_tty,
|
struct cmd_list_element *c);
|
struct cmd_list_element *c);
|
|
|
struct execution_control_state;
|
struct execution_control_state;
|
|
|
static int currently_stepping (struct execution_control_state *ecs);
|
static int currently_stepping (struct execution_control_state *ecs);
|
|
|
static void xdb_handle_command (char *args, int from_tty);
|
static void xdb_handle_command (char *args, int from_tty);
|
|
|
static int prepare_to_proceed (int);
|
static int prepare_to_proceed (int);
|
|
|
void _initialize_infrun (void);
|
void _initialize_infrun (void);
|
|
|
int inferior_ignoring_leading_exec_events = 0;
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int inferior_ignoring_leading_exec_events = 0;
|
|
|
/* When set, stop the 'step' command if we enter a function which has
|
/* When set, stop the 'step' command if we enter a function which has
|
no line number information. The normal behavior is that we step
|
no line number information. The normal behavior is that we step
|
over such function. */
|
over such function. */
|
int step_stop_if_no_debug = 0;
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int step_stop_if_no_debug = 0;
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static void
|
static void
|
show_step_stop_if_no_debug (struct ui_file *file, int from_tty,
|
show_step_stop_if_no_debug (struct ui_file *file, int from_tty,
|
struct cmd_list_element *c, const char *value)
|
struct cmd_list_element *c, const char *value)
|
{
|
{
|
fprintf_filtered (file, _("Mode of the step operation is %s.\n"), value);
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fprintf_filtered (file, _("Mode of the step operation is %s.\n"), value);
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}
|
}
|
|
|
/* In asynchronous mode, but simulating synchronous execution. */
|
/* 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
|
/* wait_for_inferior and normal_stop use this to notify the user
|
when the inferior stopped in a different thread than it had been
|
when the inferior stopped in a different thread than it had been
|
running in. */
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running in. */
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|
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static ptid_t previous_inferior_ptid;
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static ptid_t previous_inferior_ptid;
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|
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static int debug_infrun = 0;
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static int debug_infrun = 0;
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static void
|
static void
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show_debug_infrun (struct ui_file *file, int from_tty,
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show_debug_infrun (struct ui_file *file, int from_tty,
|
struct cmd_list_element *c, const char *value)
|
struct cmd_list_element *c, const char *value)
|
{
|
{
|
fprintf_filtered (file, _("Inferior debugging is %s.\n"), value);
|
fprintf_filtered (file, _("Inferior debugging is %s.\n"), value);
|
}
|
}
|
|
|
/* If the program uses ELF-style shared libraries, then calls to
|
/* If the program uses ELF-style shared libraries, then calls to
|
functions in shared libraries go through stubs, which live in a
|
functions in shared libraries go through stubs, which live in a
|
table called the PLT (Procedure Linkage Table). The first time the
|
table called the PLT (Procedure Linkage Table). The first time the
|
function is called, the stub sends control to the dynamic linker,
|
function is called, the stub sends control to the dynamic linker,
|
which looks up the function's real address, patches the stub so
|
which looks up the function's real address, patches the stub so
|
that future calls will go directly to the function, and then passes
|
that future calls will go directly to the function, and then passes
|
control to the function.
|
control to the function.
|
|
|
If we are stepping at the source level, we don't want to see any of
|
If we are stepping at the source level, we don't want to see any of
|
this --- we just want to skip over the stub and the dynamic linker.
|
this --- we just want to skip over the stub and the dynamic linker.
|
The simple approach is to single-step until control leaves the
|
The simple approach is to single-step until control leaves the
|
dynamic linker.
|
dynamic linker.
|
|
|
However, on some systems (e.g., Red Hat's 5.2 distribution) the
|
However, on some systems (e.g., Red Hat's 5.2 distribution) the
|
dynamic linker calls functions in the shared C library, so you
|
dynamic linker calls functions in the shared C library, so you
|
can't tell from the PC alone whether the dynamic linker is still
|
can't tell from the PC alone whether the dynamic linker is still
|
running. In this case, we use a step-resume breakpoint to get us
|
running. In this case, we use a step-resume breakpoint to get us
|
past the dynamic linker, as if we were using "next" to step over a
|
past the dynamic linker, as if we were using "next" to step over a
|
function call.
|
function call.
|
|
|
IN_SOLIB_DYNSYM_RESOLVE_CODE says whether we're in the dynamic
|
IN_SOLIB_DYNSYM_RESOLVE_CODE says whether we're in the dynamic
|
linker code or not. Normally, this means we single-step. However,
|
linker code or not. Normally, this means we single-step. However,
|
if SKIP_SOLIB_RESOLVER then returns non-zero, then its value is an
|
if SKIP_SOLIB_RESOLVER then returns non-zero, then its value is an
|
address where we can place a step-resume breakpoint to get past the
|
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.
|
|
|
IN_SOLIB_DYNSYM_RESOLVE_CODE can generally be implemented in a
|
IN_SOLIB_DYNSYM_RESOLVE_CODE can generally be implemented in a
|
pretty portable way, by comparing the PC against the address ranges
|
pretty portable way, by comparing the PC against the address ranges
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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
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not too hard to figure out where to put a breakpoint, but it
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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
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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
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getting the (possibly confusing) stepping behavior is better than
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signalling an error, which will obscure the change in the
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signalling an error, which will obscure the change in the
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inferior's state. */
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inferior's state. */
|
|
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/* 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
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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
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This function must be used only when a dynamic linker event has
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been caught, and the inferior is being stepped out of the hook, or
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been caught, and the inferior is being stepped out of the hook, or
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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
|
|
|
|
|
/* 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 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)
|
|
|
/* Value to pass to target_resume() to cause all threads to resume */
|
/* Value to pass to target_resume() to cause all threads to resume */
|
|
|
#define RESUME_ALL (pid_to_ptid (-1))
|
#define RESUME_ALL (pid_to_ptid (-1))
|
|
|
/* 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;
|
|
|
/* 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 presently stepping over a breakpoint.
|
/* Nonzero if we are presently stepping over a breakpoint.
|
|
|
If we hit a breakpoint or watchpoint, and then continue,
|
If we hit a breakpoint or watchpoint, and then continue,
|
we need to single step the current thread with breakpoints
|
we need to single step the current thread with breakpoints
|
disabled, to avoid hitting the same breakpoint or
|
disabled, to avoid hitting the same breakpoint or
|
watchpoint again. And we should step just a single
|
watchpoint again. And we should step just a single
|
thread and keep other threads stopped, so that
|
thread and keep other threads stopped, so that
|
other threads don't miss breakpoints while they are removed.
|
other threads don't miss breakpoints while they are removed.
|
|
|
So, this variable simultaneously means that we need to single
|
So, this variable simultaneously means that we need to single
|
step the current thread, keep other threads stopped, and that
|
step the current thread, keep other threads stopped, and that
|
breakpoints should be removed while we step.
|
breakpoints should be removed while we step.
|
|
|
This variable is set either:
|
This variable is set either:
|
- in proceed, when we resume inferior on user's explicit request
|
- in proceed, when we resume inferior on user's explicit request
|
- in keep_going, if handle_inferior_event decides we need to
|
- in keep_going, if handle_inferior_event decides we need to
|
step over breakpoint.
|
step over breakpoint.
|
|
|
The variable is cleared in clear_proceed_status, called every
|
The variable is cleared in clear_proceed_status, called every
|
time before we call proceed. The proceed calls wait_for_inferior,
|
time before we call proceed. The proceed calls wait_for_inferior,
|
which calls handle_inferior_event in a loop, and until
|
which calls handle_inferior_event in a loop, and until
|
wait_for_inferior exits, this variable is changed only by keep_going. */
|
wait_for_inferior exits, this variable is changed only by keep_going. */
|
|
|
static int stepping_over_breakpoint;
|
static int stepping_over_breakpoint;
|
|
|
/* 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;
|
static void
|
static void
|
show_stop_on_solib_events (struct ui_file *file, int from_tty,
|
show_stop_on_solib_events (struct ui_file *file, int from_tty,
|
struct cmd_list_element *c, const char *value)
|
struct cmd_list_element *c, const char *value)
|
{
|
{
|
fprintf_filtered (file, _("Stopping for shared library events is %s.\n"),
|
fprintf_filtered (file, _("Stopping for shared library events is %s.\n"),
|
value);
|
value);
|
}
|
}
|
|
|
/* 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?). */
|
|
|
enum stop_kind stop_soon;
|
enum stop_kind stop_soon;
|
|
|
/* 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). */
|
|
|
struct regcache *stop_registers;
|
struct regcache *stop_registers;
|
|
|
/* 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;
|
|
|
/* This is a cached copy of the pid/waitstatus of the last event
|
/* This is a cached copy of the pid/waitstatus of the last event
|
returned by target_wait()/deprecated_target_wait_hook(). This
|
returned by target_wait()/deprecated_target_wait_hook(). This
|
information is returned by get_last_target_status(). */
|
information is returned by get_last_target_status(). */
|
static ptid_t target_last_wait_ptid;
|
static ptid_t target_last_wait_ptid;
|
static struct target_waitstatus target_last_waitstatus;
|
static struct target_waitstatus target_last_waitstatus;
|
|
|
/* 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 child_pid;
|
int child_pid;
|
}
|
}
|
fork_event;
|
fork_event;
|
char *execd_pathname;
|
char *execd_pathname;
|
}
|
}
|
pending_follow;
|
pending_follow;
|
|
|
static const char follow_fork_mode_child[] = "child";
|
static const char follow_fork_mode_child[] = "child";
|
static const char follow_fork_mode_parent[] = "parent";
|
static const char follow_fork_mode_parent[] = "parent";
|
|
|
static const char *follow_fork_mode_kind_names[] = {
|
static const char *follow_fork_mode_kind_names[] = {
|
follow_fork_mode_child,
|
follow_fork_mode_child,
|
follow_fork_mode_parent,
|
follow_fork_mode_parent,
|
NULL
|
NULL
|
};
|
};
|
|
|
static const char *follow_fork_mode_string = follow_fork_mode_parent;
|
static const char *follow_fork_mode_string = follow_fork_mode_parent;
|
static void
|
static void
|
show_follow_fork_mode_string (struct ui_file *file, int from_tty,
|
show_follow_fork_mode_string (struct ui_file *file, int from_tty,
|
struct cmd_list_element *c, const char *value)
|
struct cmd_list_element *c, const char *value)
|
{
|
{
|
fprintf_filtered (file, _("\
|
fprintf_filtered (file, _("\
|
Debugger response to a program call of fork or vfork is \"%s\".\n"),
|
Debugger response to a program call of fork or vfork is \"%s\".\n"),
|
value);
|
value);
|
}
|
}
|
|
|
|
|
static int
|
static int
|
follow_fork (void)
|
follow_fork (void)
|
{
|
{
|
int follow_child = (follow_fork_mode_string == follow_fork_mode_child);
|
int follow_child = (follow_fork_mode_string == follow_fork_mode_child);
|
|
|
return target_follow_fork (follow_child);
|
return target_follow_fork (follow_child);
|
}
|
}
|
|
|
void
|
void
|
follow_inferior_reset_breakpoints (void)
|
follow_inferior_reset_breakpoints (void)
|
{
|
{
|
/* 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)
|
breakpoint_re_set_thread (step_resume_breakpoint);
|
breakpoint_re_set_thread (step_resume_breakpoint);
|
|
|
/* Reinsert all breakpoints in the child. The user may have set
|
/* Reinsert all breakpoints in the child. The user may have set
|
breakpoints after catching the fork, in which case those
|
breakpoints after catching the fork, in which case those
|
were never set in the child, but only in the parent. This makes
|
were never set in the child, but only in the parent. This makes
|
sure the inserted breakpoints match the breakpoint list. */
|
sure the inserted breakpoints match the breakpoint list. */
|
|
|
breakpoint_re_set ();
|
breakpoint_re_set ();
|
insert_breakpoints ();
|
insert_breakpoints ();
|
}
|
}
|
|
|
/* EXECD_PATHNAME is assumed to be non-NULL. */
|
/* EXECD_PATHNAME is assumed to be non-NULL. */
|
|
|
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;
|
|
|
/* 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;
|
|
|
/* 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. */
|
|
|
gdb_flush (gdb_stdout);
|
gdb_flush (gdb_stdout);
|
generic_mourn_inferior ();
|
generic_mourn_inferior ();
|
/* Because mourn_inferior resets inferior_ptid. */
|
/* Because mourn_inferior resets inferior_ptid. */
|
inferior_ptid = pid_to_ptid (saved_pid);
|
inferior_ptid = pid_to_ptid (saved_pid);
|
|
|
if (gdb_sysroot && *gdb_sysroot)
|
if (gdb_sysroot && *gdb_sysroot)
|
{
|
{
|
char *name = alloca (strlen (gdb_sysroot)
|
char *name = alloca (strlen (gdb_sysroot)
|
+ strlen (execd_pathname)
|
+ strlen (execd_pathname)
|
+ 1);
|
+ 1);
|
strcpy (name, gdb_sysroot);
|
strcpy (name, gdb_sysroot);
|
strcat (name, execd_pathname);
|
strcat (name, execd_pathname);
|
execd_pathname = name;
|
execd_pathname = name;
|
}
|
}
|
|
|
/* 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_add_main (execd_pathname, 0);
|
symbol_file_add_main (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. */
|
no_shared_libraries (NULL, 0);
|
no_shared_libraries (NULL, 0);
|
#ifdef SOLIB_CREATE_INFERIOR_HOOK
|
#ifdef SOLIB_CREATE_INFERIOR_HOOK
|
SOLIB_CREATE_INFERIOR_HOOK (PIDGET (inferior_ptid));
|
SOLIB_CREATE_INFERIOR_HOOK (PIDGET (inferior_ptid));
|
#else
|
#else
|
solib_create_inferior_hook ();
|
solib_create_inferior_hook ();
|
#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;
|
|
|
/* The thread we inserted single-step breakpoints for. */
|
/* The thread we inserted single-step breakpoints for. */
|
static ptid_t singlestep_ptid;
|
static ptid_t singlestep_ptid;
|
|
|
/* PC when we started this single-step. */
|
/* PC when we started this single-step. */
|
static CORE_ADDR singlestep_pc;
|
static CORE_ADDR singlestep_pc;
|
|
|
/* If another thread hit the singlestep breakpoint, we save the original
|
/* If another thread hit the singlestep breakpoint, we save the original
|
thread here so that we can resume single-stepping it later. */
|
thread here so that we can resume single-stepping it later. */
|
static ptid_t saved_singlestep_ptid;
|
static ptid_t saved_singlestep_ptid;
|
static int stepping_past_singlestep_breakpoint;
|
static int stepping_past_singlestep_breakpoint;
|
|
|
/* If not equal to null_ptid, this means that after stepping over breakpoint
|
/* If not equal to null_ptid, this means that after stepping over breakpoint
|
is finished, we need to switch to deferred_step_ptid, and step it.
|
is finished, we need to switch to deferred_step_ptid, and step it.
|
|
|
The use case is when one thread has hit a breakpoint, and then the user
|
The use case is when one thread has hit a breakpoint, and then the user
|
has switched to another thread and issued 'step'. We need to step over
|
has switched to another thread and issued 'step'. We need to step over
|
breakpoint in the thread which hit the breakpoint, but then continue
|
breakpoint in the thread which hit the breakpoint, but then continue
|
stepping the thread user has selected. */
|
stepping the thread user has selected. */
|
static ptid_t deferred_step_ptid;
|
static ptid_t deferred_step_ptid;
|
|
|
|
|
/* Things to clean up if we QUIT out of resume (). */
|
/* Things to clean up if we QUIT out of resume (). */
|
static void
|
static void
|
resume_cleanups (void *ignore)
|
resume_cleanups (void *ignore)
|
{
|
{
|
normal_stop ();
|
normal_stop ();
|
}
|
}
|
|
|
static const char schedlock_off[] = "off";
|
static const char schedlock_off[] = "off";
|
static const char schedlock_on[] = "on";
|
static const char schedlock_on[] = "on";
|
static const char schedlock_step[] = "step";
|
static const char schedlock_step[] = "step";
|
static const char *scheduler_enums[] = {
|
static const char *scheduler_enums[] = {
|
schedlock_off,
|
schedlock_off,
|
schedlock_on,
|
schedlock_on,
|
schedlock_step,
|
schedlock_step,
|
NULL
|
NULL
|
};
|
};
|
static const char *scheduler_mode = schedlock_off;
|
static const char *scheduler_mode = schedlock_off;
|
static void
|
static void
|
show_scheduler_mode (struct ui_file *file, int from_tty,
|
show_scheduler_mode (struct ui_file *file, int from_tty,
|
struct cmd_list_element *c, const char *value)
|
struct cmd_list_element *c, const char *value)
|
{
|
{
|
fprintf_filtered (file, _("\
|
fprintf_filtered (file, _("\
|
Mode for locking scheduler during execution is \"%s\".\n"),
|
Mode for locking scheduler during execution is \"%s\".\n"),
|
value);
|
value);
|
}
|
}
|
|
|
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 (!target_can_lock_scheduler)
|
if (!target_can_lock_scheduler)
|
{
|
{
|
scheduler_mode = schedlock_off;
|
scheduler_mode = schedlock_off;
|
error (_("Target '%s' cannot support this command."), target_shortname);
|
error (_("Target '%s' cannot support this command."), 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 (resume_cleanups, 0);
|
struct cleanup *old_cleanups = make_cleanup (resume_cleanups, 0);
|
QUIT;
|
QUIT;
|
|
|
if (debug_infrun)
|
if (debug_infrun)
|
fprintf_unfiltered (gdb_stdlog, "infrun: resume (step=%d, signal=%d)\n",
|
fprintf_unfiltered (gdb_stdlog, "infrun: resume (step=%d, signal=%d)\n",
|
step, sig);
|
step, sig);
|
|
|
/* FIXME: calling breakpoint_here_p (read_pc ()) three times! */
|
/* FIXME: calling breakpoint_here_p (read_pc ()) three times! */
|
|
|
|
|
/* 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)
|
if (CANNOT_STEP_HW_WATCHPOINTS && step)
|
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)
|
{
|
{
|
if (gdbarch_skip_permanent_breakpoint_p (current_gdbarch))
|
if (gdbarch_skip_permanent_breakpoint_p (current_gdbarch))
|
gdbarch_skip_permanent_breakpoint (current_gdbarch,
|
gdbarch_skip_permanent_breakpoint (current_gdbarch,
|
get_current_regcache ());
|
get_current_regcache ());
|
else
|
else
|
error (_("\
|
error (_("\
|
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."));
|
a command like `return' or `jump' to continue execution."));
|
}
|
}
|
|
|
if (step && gdbarch_software_single_step_p (current_gdbarch))
|
if (step && gdbarch_software_single_step_p (current_gdbarch))
|
{
|
{
|
/* Do it the hard way, w/temp breakpoints */
|
/* Do it the hard way, w/temp breakpoints */
|
if (gdbarch_software_single_step (current_gdbarch, get_current_frame ()))
|
if (gdbarch_software_single_step (current_gdbarch, get_current_frame ()))
|
{
|
{
|
/* ...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;
|
singlestep_ptid = inferior_ptid;
|
singlestep_ptid = inferior_ptid;
|
singlestep_pc = read_pc ();
|
singlestep_pc = read_pc ();
|
}
|
}
|
}
|
}
|
|
|
/* 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:
|
case TARGET_WAITKIND_VFORKED:
|
case TARGET_WAITKIND_VFORKED:
|
pending_follow.kind = TARGET_WAITKIND_SPURIOUS;
|
pending_follow.kind = TARGET_WAITKIND_SPURIOUS;
|
if (follow_fork ())
|
if (follow_fork ())
|
should_resume = 0;
|
should_resume = 0;
|
break;
|
break;
|
|
|
case TARGET_WAITKIND_EXECD:
|
case TARGET_WAITKIND_EXECD:
|
/* follow_exec is called as soon as the exec event is seen. */
|
/* follow_exec is called as soon as the exec event is seen. */
|
pending_follow.kind = TARGET_WAITKIND_SPURIOUS;
|
pending_follow.kind = TARGET_WAITKIND_SPURIOUS;
|
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)
|
{
|
{
|
ptid_t resume_ptid;
|
ptid_t resume_ptid;
|
|
|
resume_ptid = RESUME_ALL; /* Default */
|
resume_ptid = RESUME_ALL; /* Default */
|
|
|
/* If STEP is set, it's a request to use hardware stepping
|
/* If STEP is set, it's a request to use hardware stepping
|
facilities. But in that case, we should never
|
facilities. But in that case, we should never
|
use singlestep breakpoint. */
|
use singlestep breakpoint. */
|
gdb_assert (!(singlestep_breakpoints_inserted_p && step));
|
gdb_assert (!(singlestep_breakpoints_inserted_p && step));
|
|
|
if (singlestep_breakpoints_inserted_p
|
if (singlestep_breakpoints_inserted_p
|
&& stepping_past_singlestep_breakpoint)
|
&& stepping_past_singlestep_breakpoint)
|
{
|
{
|
/* The situation here is as follows. In thread T1 we wanted to
|
/* The situation here is as follows. In thread T1 we wanted to
|
single-step. Lacking hardware single-stepping we've
|
single-step. Lacking hardware single-stepping we've
|
set breakpoint at the PC of the next instruction -- call it
|
set breakpoint at the PC of the next instruction -- call it
|
P. After resuming, we've hit that breakpoint in thread T2.
|
P. After resuming, we've hit that breakpoint in thread T2.
|
Now we've removed original breakpoint, inserted breakpoint
|
Now we've removed original breakpoint, inserted breakpoint
|
at P+1, and try to step to advance T2 past breakpoint.
|
at P+1, and try to step to advance T2 past breakpoint.
|
We need to step only T2, as if T1 is allowed to freely run,
|
We need to step only T2, as if T1 is allowed to freely run,
|
it can run past P, and if other threads are allowed to run,
|
it can run past P, and if other threads are allowed to run,
|
they can hit breakpoint at P+1, and nested hits of single-step
|
they can hit breakpoint at P+1, and nested hits of single-step
|
breakpoints is not something we'd want -- that's complicated
|
breakpoints is not something we'd want -- that's complicated
|
to support, and has no value. */
|
to support, and has no value. */
|
resume_ptid = inferior_ptid;
|
resume_ptid = inferior_ptid;
|
}
|
}
|
|
|
if ((step || singlestep_breakpoints_inserted_p)
|
if ((step || singlestep_breakpoints_inserted_p)
|
&& breakpoint_here_p (read_pc ())
|
&& breakpoint_here_p (read_pc ())
|
&& !breakpoint_inserted_here_p (read_pc ()))
|
&& !breakpoint_inserted_here_p (read_pc ()))
|
{
|
{
|
/* We're stepping, have breakpoint at PC, and it's
|
/* We're stepping, have breakpoint at PC, and it's
|
not inserted. Most likely, proceed has noticed that
|
not inserted. Most likely, proceed has noticed that
|
we have breakpoint and tries to single-step over it,
|
we have breakpoint and tries to single-step over it,
|
so that it's not hit. In which case, we need to
|
so that it's not hit. In which case, we need to
|
single-step only this thread, and keep others stopped,
|
single-step only this thread, and keep others stopped,
|
as they can miss this breakpoint if allowed to run.
|
as they can miss this breakpoint if allowed to run.
|
|
|
The current code either has all breakpoints inserted,
|
The current code either has all breakpoints inserted,
|
or all removed, so if we let other threads run,
|
or all removed, so if we let other threads run,
|
we can actually miss any breakpoint, not the one at PC. */
|
we can actually miss any breakpoint, not the one at PC. */
|
resume_ptid = inferior_ptid;
|
resume_ptid = inferior_ptid;
|
}
|
}
|
|
|
if ((scheduler_mode == schedlock_on)
|
if ((scheduler_mode == schedlock_on)
|
|| (scheduler_mode == schedlock_step
|
|| (scheduler_mode == schedlock_step
|
&& (step || singlestep_breakpoints_inserted_p)))
|
&& (step || singlestep_breakpoints_inserted_p)))
|
{
|
{
|
/* User-settable 'scheduler' mode requires solo thread resume. */
|
/* User-settable 'scheduler' mode requires solo thread resume. */
|
resume_ptid = inferior_ptid;
|
resume_ptid = inferior_ptid;
|
}
|
}
|
|
|
if (gdbarch_cannot_step_breakpoint (current_gdbarch))
|
if (gdbarch_cannot_step_breakpoint (current_gdbarch))
|
{
|
{
|
/* Most targets can step a breakpoint instruction, thus
|
/* Most targets can step a breakpoint instruction, thus
|
executing it normally. But if this one cannot, just
|
executing it normally. But if this one cannot, just
|
continue and we will hit it anyway. */
|
continue and we will hit it anyway. */
|
if (step && breakpoint_inserted_here_p (read_pc ()))
|
if (step && breakpoint_inserted_here_p (read_pc ()))
|
step = 0;
|
step = 0;
|
}
|
}
|
target_resume (resume_ptid, step, sig);
|
target_resume (resume_ptid, 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)
|
{
|
{
|
stepping_over_breakpoint = 0;
|
stepping_over_breakpoint = 0;
|
step_range_start = 0;
|
step_range_start = 0;
|
step_range_end = 0;
|
step_range_end = 0;
|
step_frame_id = null_frame_id;
|
step_frame_id = null_frame_id;
|
step_over_calls = STEP_OVER_UNDEBUGGABLE;
|
step_over_calls = STEP_OVER_UNDEBUGGABLE;
|
stop_after_trap = 0;
|
stop_after_trap = 0;
|
stop_soon = NO_STOP_QUIETLY;
|
stop_soon = NO_STOP_QUIETLY;
|
proceed_to_finish = 0;
|
proceed_to_finish = 0;
|
breakpoint_proceeded = 1; /* We're about to proceed... */
|
breakpoint_proceeded = 1; /* We're about to proceed... */
|
|
|
if (stop_registers)
|
if (stop_registers)
|
{
|
{
|
regcache_xfree (stop_registers);
|
regcache_xfree (stop_registers);
|
stop_registers = NULL;
|
stop_registers = NULL;
|
}
|
}
|
|
|
/* 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);
|
}
|
}
|
|
|
/* This should be suitable for any targets that support threads. */
|
/* This should be suitable for any targets that support threads. */
|
|
|
static int
|
static int
|
prepare_to_proceed (int step)
|
prepare_to_proceed (int step)
|
{
|
{
|
ptid_t wait_ptid;
|
ptid_t wait_ptid;
|
struct target_waitstatus wait_status;
|
struct target_waitstatus wait_status;
|
|
|
/* Get the last target status returned by target_wait(). */
|
/* Get the last target status returned by target_wait(). */
|
get_last_target_status (&wait_ptid, &wait_status);
|
get_last_target_status (&wait_ptid, &wait_status);
|
|
|
/* Make sure we were stopped at a breakpoint. */
|
/* Make sure we were stopped at a breakpoint. */
|
if (wait_status.kind != TARGET_WAITKIND_STOPPED
|
if (wait_status.kind != TARGET_WAITKIND_STOPPED
|
|| wait_status.value.sig != TARGET_SIGNAL_TRAP)
|
|| wait_status.value.sig != TARGET_SIGNAL_TRAP)
|
{
|
{
|
return 0;
|
return 0;
|
}
|
}
|
|
|
/* Switched over from WAIT_PID. */
|
/* Switched over from WAIT_PID. */
|
if (!ptid_equal (wait_ptid, minus_one_ptid)
|
if (!ptid_equal (wait_ptid, minus_one_ptid)
|
&& !ptid_equal (inferior_ptid, wait_ptid)
|
&& !ptid_equal (inferior_ptid, wait_ptid)
|
&& breakpoint_here_p (read_pc_pid (wait_ptid)))
|
&& breakpoint_here_p (read_pc_pid (wait_ptid)))
|
{
|
{
|
/* If stepping, remember current thread to switch back to. */
|
/* If stepping, remember current thread to switch back to. */
|
if (step)
|
if (step)
|
{
|
{
|
deferred_step_ptid = inferior_ptid;
|
deferred_step_ptid = inferior_ptid;
|
}
|
}
|
|
|
/* Switch back to WAIT_PID thread. */
|
/* Switch back to WAIT_PID thread. */
|
switch_to_thread (wait_ptid);
|
switch_to_thread (wait_ptid);
|
|
|
/* We return 1 to indicate that there is a breakpoint here,
|
/* We return 1 to indicate that there is a breakpoint here,
|
so we need to step over it before continuing to avoid
|
so we need to step over it before continuing to avoid
|
hitting it straight away. */
|
hitting it straight away. */
|
return 1;
|
return 1;
|
}
|
}
|
|
|
return 0;
|
return 0;
|
}
|
}
|
|
|
/* Record the pc of the program the last time it stopped. This is
|
/* Record the pc of the program the last time it stopped. This is
|
just used internally by wait_for_inferior, but need to be preserved
|
just used internally by wait_for_inferior, but need to be preserved
|
over calls to it and cleared when the inferior is started. */
|
over calls to it and cleared when the inferior is started. */
|
static CORE_ADDR prev_pc;
|
static CORE_ADDR prev_pc;
|
|
|
/* 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 (read_pc () == stop_pc && breakpoint_here_p (read_pc ()))
|
if (read_pc () == stop_pc && breakpoint_here_p (read_pc ()))
|
/* There is a breakpoint at the address we will resume at,
|
/* There is a breakpoint at the address we will resume at,
|
step one instruction before inserting breakpoints so that
|
step one instruction before inserting breakpoints so that
|
we do not stop right away (and report a second hit at this
|
we do not stop right away (and report a second hit at this
|
breakpoint). */
|
breakpoint). */
|
oneproc = 1;
|
oneproc = 1;
|
else if (gdbarch_single_step_through_delay_p (current_gdbarch)
|
else if (gdbarch_single_step_through_delay_p (current_gdbarch)
|
&& gdbarch_single_step_through_delay (current_gdbarch,
|
&& gdbarch_single_step_through_delay (current_gdbarch,
|
get_current_frame ()))
|
get_current_frame ()))
|
/* We stepped onto an instruction that needs to be stepped
|
/* We stepped onto an instruction that needs to be stepped
|
again before re-inserting the breakpoint, do so. */
|
again before re-inserting the breakpoint, do so. */
|
oneproc = 1;
|
oneproc = 1;
|
}
|
}
|
else
|
else
|
{
|
{
|
write_pc (addr);
|
write_pc (addr);
|
}
|
}
|
|
|
if (debug_infrun)
|
if (debug_infrun)
|
fprintf_unfiltered (gdb_stdlog,
|
fprintf_unfiltered (gdb_stdlog,
|
"infrun: proceed (addr=0x%s, signal=%d, step=%d)\n",
|
"infrun: proceed (addr=0x%s, signal=%d, step=%d)\n",
|
paddr_nz (addr), siggnal, step);
|
paddr_nz (addr), siggnal, step);
|
|
|
/* 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 (step))
|
if (prepare_to_proceed (step))
|
oneproc = 1;
|
oneproc = 1;
|
|
|
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. */
|
stepping_over_breakpoint = 1;
|
stepping_over_breakpoint = 1;
|
else
|
else
|
insert_breakpoints ();
|
insert_breakpoints ();
|
|
|
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);
|
|
|
/* Refresh prev_pc value just prior to resuming. This used to be
|
/* Refresh prev_pc value just prior to resuming. This used to be
|
done in stop_stepping, however, setting prev_pc there did not handle
|
done in stop_stepping, however, setting prev_pc there did not handle
|
scenarios such as inferior function calls or returning from
|
scenarios such as inferior function calls or returning from
|
a function via the return command. In those cases, the prev_pc
|
a function via the return command. In those cases, the prev_pc
|
value was not set properly for subsequent commands. The prev_pc value
|
value was not set properly for subsequent commands. The prev_pc value
|
is used to initialize the starting line number in the ecs. With an
|
is used to initialize the starting line number in the ecs. With an
|
invalid value, the gdb next command ends up stopping at the position
|
invalid value, the gdb next command ends up stopping at the position
|
represented by the next line table entry past our start position.
|
represented by the next line table entry past our start position.
|
On platforms that generate one line table entry per line, this
|
On platforms that generate one line table entry per line, this
|
is not a problem. However, on the ia64, the compiler generates
|
is not a problem. However, on the ia64, the compiler generates
|
extraneous line table entries that do not increase the line number.
|
extraneous line table entries that do not increase the line number.
|
When we issue the gdb next command on the ia64 after an inferior call
|
When we issue the gdb next command on the ia64 after an inferior call
|
or a return command, we often end up a few instructions forward, still
|
or a return command, we often end up a few instructions forward, still
|
within the original line we started.
|
within the original line we started.
|
|
|
An attempt was made to have init_execution_control_state () refresh
|
An attempt was made to have init_execution_control_state () refresh
|
the prev_pc value before calculating the line number. This approach
|
the prev_pc value before calculating the line number. This approach
|
did not work because on platforms that use ptrace, the pc register
|
did not work because on platforms that use ptrace, the pc register
|
cannot be read unless the inferior is stopped. At that point, we
|
cannot be read unless the inferior is stopped. At that point, we
|
are not guaranteed the inferior is stopped and so the read_pc ()
|
are not guaranteed the inferior is stopped and so the read_pc ()
|
call can fail. Setting the prev_pc value here ensures the value is
|
call can fail. Setting the prev_pc value here ensures the value is
|
updated correctly when the inferior is stopped. */
|
updated correctly when the inferior is stopped. */
|
prev_pc = read_pc ();
|
prev_pc = read_pc ();
|
|
|
/* 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 (!target_can_async_p ())
|
if (!target_can_async_p ())
|
{
|
{
|
wait_for_inferior (0);
|
wait_for_inferior (0);
|
normal_stop ();
|
normal_stop ();
|
}
|
}
|
}
|
}
|
|
|
|
|
/* Start remote-debugging of a machine over a serial link. */
|
/* Start remote-debugging of a machine over a serial link. */
|
|
|
void
|
void
|
start_remote (int from_tty)
|
start_remote (int from_tty)
|
{
|
{
|
init_thread_list ();
|
init_thread_list ();
|
init_wait_for_inferior ();
|
init_wait_for_inferior ();
|
stop_soon = STOP_QUIETLY_REMOTE;
|
stop_soon = STOP_QUIETLY_REMOTE;
|
stepping_over_breakpoint = 0;
|
stepping_over_breakpoint = 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 to wait_for_inferior that a target should timeout if
|
indicate to 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 (0);
|
wait_for_inferior (0);
|
|
|
/* Now that the inferior has stopped, do any bookkeeping like
|
/* Now that the inferior has stopped, do any bookkeeping like
|
loading shared libraries. We want to do this before normal_stop,
|
loading shared libraries. We want to do this before normal_stop,
|
so that the displayed frame is up to date. */
|
so that the displayed frame is up to date. */
|
post_create_inferior (¤t_target, from_tty);
|
post_create_inferior (¤t_target, from_tty);
|
|
|
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;
|
|
|
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. */
|
|
|
clear_proceed_status ();
|
clear_proceed_status ();
|
|
|
stepping_past_singlestep_breakpoint = 0;
|
stepping_past_singlestep_breakpoint = 0;
|
deferred_step_ptid = null_ptid;
|
deferred_step_ptid = null_ptid;
|
|
|
target_last_wait_ptid = minus_one_ptid;
|
target_last_wait_ptid = minus_one_ptid;
|
}
|
}
|
|
|
/* 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_step_watch_state,
|
infwait_step_watch_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
|
{
|
{
|
/* Step, next, nexti, stepi finished. */
|
/* Step, next, nexti, stepi finished. */
|
END_STEPPING_RANGE,
|
END_STEPPING_RANGE,
|
/* 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;
|
/* Should we step over breakpoint next time keep_going
|
/* Should we step over breakpoint next time keep_going
|
is called? */
|
is called? */
|
int stepping_over_breakpoint;
|
int stepping_over_breakpoint;
|
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 current_line;
|
int current_line;
|
struct symtab *current_symtab;
|
struct symtab *current_symtab;
|
int handling_longjmp; /* FIXME */
|
int handling_longjmp; /* FIXME */
|
ptid_t ptid;
|
ptid_t ptid;
|
ptid_t saved_inferior_ptid;
|
ptid_t saved_inferior_ptid;
|
int step_after_step_resume_breakpoint;
|
int step_after_step_resume_breakpoint;
|
int stepping_through_solib_after_catch;
|
int stepping_through_solib_after_catch;
|
bpstat stepping_through_solib_catchpoints;
|
bpstat stepping_through_solib_catchpoints;
|
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;
|
ptid_t waiton_ptid;
|
ptid_t waiton_ptid;
|
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 step_into_function (struct execution_control_state *ecs);
|
static void step_into_function (struct execution_control_state *ecs);
|
static void insert_step_resume_breakpoint_at_frame (struct frame_info *step_frame);
|
static void insert_step_resume_breakpoint_at_frame (struct frame_info *step_frame);
|
static void insert_step_resume_breakpoint_at_caller (struct frame_info *);
|
static void insert_step_resume_breakpoint_at_caller (struct frame_info *);
|
static void insert_step_resume_breakpoint_at_sal (struct symtab_and_line sr_sal,
|
static void insert_step_resume_breakpoint_at_sal (struct symtab_and_line sr_sal,
|
struct frame_id sr_id);
|
struct frame_id sr_id);
|
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,
|
static void print_stop_reason (enum inferior_stop_reason stop_reason,
|
int stop_info);
|
int stop_info);
|
|
|
/* Wait for control to return from inferior to debugger.
|
/* Wait for control to return from inferior to debugger.
|
|
|
If TREAT_EXEC_AS_SIGTRAP is non-zero, then handle EXEC signals
|
If TREAT_EXEC_AS_SIGTRAP is non-zero, then handle EXEC signals
|
as if they were SIGTRAP signals. This can be useful during
|
as if they were SIGTRAP signals. This can be useful during
|
the startup sequence on some targets such as HP/UX, where
|
the startup sequence on some targets such as HP/UX, where
|
we receive an EXEC event instead of the expected SIGTRAP.
|
we receive an EXEC event instead of the expected SIGTRAP.
|
|
|
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 (int treat_exec_as_sigtrap)
|
wait_for_inferior (int treat_exec_as_sigtrap)
|
{
|
{
|
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;
|
|
|
if (debug_infrun)
|
if (debug_infrun)
|
fprintf_unfiltered
|
fprintf_unfiltered
|
(gdb_stdlog, "infrun: wait_for_inferior (treat_exec_as_sigtrap=%d)\n",
|
(gdb_stdlog, "infrun: wait_for_inferior (treat_exec_as_sigtrap=%d)\n",
|
treat_exec_as_sigtrap);
|
treat_exec_as_sigtrap);
|
|
|
old_cleanups = make_cleanup (delete_step_resume_breakpoint,
|
old_cleanups = make_cleanup (delete_step_resume_breakpoint,
|
&step_resume_breakpoint);
|
&step_resume_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);
|
|
|
/* 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_ptid = inferior_ptid;
|
previous_inferior_ptid = inferior_ptid;
|
|
|
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 (deprecated_target_wait_hook)
|
if (deprecated_target_wait_hook)
|
ecs->ptid = deprecated_target_wait_hook (ecs->waiton_ptid, ecs->wp);
|
ecs->ptid = deprecated_target_wait_hook (ecs->waiton_ptid, ecs->wp);
|
else
|
else
|
ecs->ptid = target_wait (ecs->waiton_ptid, ecs->wp);
|
ecs->ptid = target_wait (ecs->waiton_ptid, ecs->wp);
|
|
|
if (treat_exec_as_sigtrap && ecs->ws.kind == TARGET_WAITKIND_EXECD)
|
if (treat_exec_as_sigtrap && ecs->ws.kind == TARGET_WAITKIND_EXECD)
|
{
|
{
|
xfree (ecs->ws.value.execd_pathname);
|
xfree (ecs->ws.value.execd_pathname);
|
ecs->ws.kind = TARGET_WAITKIND_STOPPED;
|
ecs->ws.kind = TARGET_WAITKIND_STOPPED;
|
ecs->ws.value.sig = TARGET_SIGNAL_TRAP;
|
ecs->ws.value.sig = TARGET_SIGNAL_TRAP;
|
}
|
}
|
|
|
/* 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 (void *client_data)
|
fetch_inferior_event (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_step_resume_breakpoint,
|
old_cleanups = make_exec_cleanup (delete_step_resume_breakpoint,
|
&step_resume_breakpoint);
|
&step_resume_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);
|
|
|
/* 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_ptid = inferior_ptid;
|
previous_inferior_ptid = inferior_ptid;
|
|
|
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 (deprecated_target_wait_hook)
|
if (deprecated_target_wait_hook)
|
async_ecs->ptid =
|
async_ecs->ptid =
|
deprecated_target_wait_hook (async_ecs->waiton_ptid, async_ecs->wp);
|
deprecated_target_wait_hook (async_ecs->waiton_ptid, async_ecs->wp);
|
else
|
else
|
async_ecs->ptid = target_wait (async_ecs->waiton_ptid, async_ecs->wp);
|
async_ecs->ptid = target_wait (async_ecs->waiton_ptid, 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->stepping_over_breakpoint = 0;
|
ecs->stepping_over_breakpoint = 0;
|
ecs->random_signal = 0;
|
ecs->random_signal = 0;
|
ecs->step_after_step_resume_breakpoint = 0;
|
ecs->step_after_step_resume_breakpoint = 0;
|
ecs->handling_longjmp = 0; /* FIXME */
|
ecs->handling_longjmp = 0; /* FIXME */
|
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->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_ptid = pid_to_ptid (-1);
|
ecs->waiton_ptid = pid_to_ptid (-1);
|
ecs->wp = &(ecs->ws);
|
ecs->wp = &(ecs->ws);
|
}
|
}
|
|
|
/* Return the cached copy of the last pid/waitstatus returned by
|
/* Return the cached copy of the last pid/waitstatus returned by
|
target_wait()/deprecated_target_wait_hook(). The data is actually
|
target_wait()/deprecated_target_wait_hook(). The data is actually
|
cached by handle_inferior_event(), which gets called immediately
|
cached by handle_inferior_event(), which gets called immediately
|
after target_wait()/deprecated_target_wait_hook(). */
|
after target_wait()/deprecated_target_wait_hook(). */
|
|
|
void
|
void
|
get_last_target_status (ptid_t *ptidp, struct target_waitstatus *status)
|
get_last_target_status (ptid_t *ptidp, struct target_waitstatus *status)
|
{
|
{
|
*ptidp = target_last_wait_ptid;
|
*ptidp = target_last_wait_ptid;
|
*status = target_last_waitstatus;
|
*status = target_last_waitstatus;
|
}
|
}
|
|
|
void
|
void
|
nullify_last_target_wait_ptid (void)
|
nullify_last_target_wait_ptid (void)
|
{
|
{
|
target_last_wait_ptid = minus_one_ptid;
|
target_last_wait_ptid = minus_one_ptid;
|
}
|
}
|
|
|
/* Switch thread contexts, maintaining "infrun state". */
|
/* Switch thread contexts, maintaining "infrun state". */
|
|
|
static void
|
static void
|
context_switch (struct execution_control_state *ecs)
|
context_switch (struct execution_control_state *ecs)
|
{
|
{
|
/* 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 (debug_infrun)
|
if (debug_infrun)
|
{
|
{
|
fprintf_unfiltered (gdb_stdlog, "infrun: Switching context from %s ",
|
fprintf_unfiltered (gdb_stdlog, "infrun: Switching context from %s ",
|
target_pid_to_str (inferior_ptid));
|
target_pid_to_str (inferior_ptid));
|
fprintf_unfiltered (gdb_stdlog, "to %s\n",
|
fprintf_unfiltered (gdb_stdlog, "to %s\n",
|
target_pid_to_str (ecs->ptid));
|
target_pid_to_str (ecs->ptid));
|
}
|
}
|
|
|
if (in_thread_list (inferior_ptid) && in_thread_list (ecs->ptid))
|
if (in_thread_list (inferior_ptid) && in_thread_list (ecs->ptid))
|
{ /* 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_ptid, prev_pc,
|
save_infrun_state (inferior_ptid, prev_pc,
|
stepping_over_breakpoint, step_resume_breakpoint,
|
stepping_over_breakpoint, step_resume_breakpoint,
|
step_range_start,
|
step_range_start,
|
step_range_end, &step_frame_id,
|
step_range_end, &step_frame_id,
|
ecs->handling_longjmp, ecs->stepping_over_breakpoint,
|
ecs->handling_longjmp, ecs->stepping_over_breakpoint,
|
ecs->stepping_through_solib_after_catch,
|
ecs->stepping_through_solib_after_catch,
|
ecs->stepping_through_solib_catchpoints,
|
ecs->stepping_through_solib_catchpoints,
|
ecs->current_line, ecs->current_symtab);
|
ecs->current_line, ecs->current_symtab);
|
|
|
/* Load infrun state for the new thread. */
|
/* Load infrun state for the new thread. */
|
load_infrun_state (ecs->ptid, &prev_pc,
|
load_infrun_state (ecs->ptid, &prev_pc,
|
&stepping_over_breakpoint, &step_resume_breakpoint,
|
&stepping_over_breakpoint, &step_resume_breakpoint,
|
&step_range_start,
|
&step_range_start,
|
&step_range_end, &step_frame_id,
|
&step_range_end, &step_frame_id,
|
&ecs->handling_longjmp, &ecs->stepping_over_breakpoint,
|
&ecs->handling_longjmp, &ecs->stepping_over_breakpoint,
|
&ecs->stepping_through_solib_after_catch,
|
&ecs->stepping_through_solib_after_catch,
|
&ecs->stepping_through_solib_catchpoints,
|
&ecs->stepping_through_solib_catchpoints,
|
&ecs->current_line, &ecs->current_symtab);
|
&ecs->current_line, &ecs->current_symtab);
|
}
|
}
|
|
|
switch_to_thread (ecs->ptid);
|
switch_to_thread (ecs->ptid);
|
}
|
}
|
|
|
static void
|
static void
|
adjust_pc_after_break (struct execution_control_state *ecs)
|
adjust_pc_after_break (struct execution_control_state *ecs)
|
{
|
{
|
CORE_ADDR breakpoint_pc;
|
CORE_ADDR breakpoint_pc;
|
|
|
/* If this target does not decrement the PC after breakpoints, then
|
/* If this target does not decrement the PC after breakpoints, then
|
we have nothing to do. */
|
we have nothing to do. */
|
if (gdbarch_decr_pc_after_break (current_gdbarch) == 0)
|
if (gdbarch_decr_pc_after_break (current_gdbarch) == 0)
|
return;
|
return;
|
|
|
/* If we've hit a breakpoint, we'll normally be stopped with SIGTRAP. If
|
/* If we've hit a breakpoint, we'll normally be stopped with SIGTRAP. If
|
we aren't, just return.
|
we aren't, just return.
|
|
|
We assume that waitkinds other than TARGET_WAITKIND_STOPPED are not
|
We assume that waitkinds other than TARGET_WAITKIND_STOPPED are not
|
affected by gdbarch_decr_pc_after_break. Other waitkinds which are
|
affected by gdbarch_decr_pc_after_break. Other waitkinds which are
|
implemented by software breakpoints should be handled through the normal
|
implemented by software breakpoints should be handled through the normal
|
breakpoint layer.
|
breakpoint layer.
|
|
|
NOTE drow/2004-01-31: On some targets, breakpoints may generate
|
NOTE drow/2004-01-31: On some targets, breakpoints may generate
|
different signals (SIGILL or SIGEMT for instance), but it is less
|
different signals (SIGILL or SIGEMT for instance), but it is less
|
clear where the PC is pointing afterwards. It may not match
|
clear where the PC is pointing afterwards. It may not match
|
gdbarch_decr_pc_after_break. I don't know any specific target that
|
gdbarch_decr_pc_after_break. I don't know any specific target that
|
generates these signals at breakpoints (the code has been in GDB since at
|
generates these signals at breakpoints (the code has been in GDB since at
|
least 1992) so I can not guess how to handle them here.
|
least 1992) so I can not guess how to handle them here.
|
|
|
In earlier versions of GDB, a target with
|
In earlier versions of GDB, a target with
|
gdbarch_have_nonsteppable_watchpoint would have the PC after hitting a
|
gdbarch_have_nonsteppable_watchpoint would have the PC after hitting a
|
watchpoint affected by gdbarch_decr_pc_after_break. I haven't found any
|
watchpoint affected by gdbarch_decr_pc_after_break. I haven't found any
|
target with both of these set in GDB history, and it seems unlikely to be
|
target with both of these set in GDB history, and it seems unlikely to be
|
correct, so gdbarch_have_nonsteppable_watchpoint is not checked here. */
|
correct, so gdbarch_have_nonsteppable_watchpoint is not checked here. */
|
|
|
if (ecs->ws.kind != TARGET_WAITKIND_STOPPED)
|
if (ecs->ws.kind != TARGET_WAITKIND_STOPPED)
|
return;
|
return;
|
|
|
if (ecs->ws.value.sig != TARGET_SIGNAL_TRAP)
|
if (ecs->ws.value.sig != TARGET_SIGNAL_TRAP)
|
return;
|
return;
|
|
|
/* Find the location where (if we've hit a breakpoint) the
|
/* Find the location where (if we've hit a breakpoint) the
|
breakpoint would be. */
|
breakpoint would be. */
|
breakpoint_pc = read_pc_pid (ecs->ptid) - gdbarch_decr_pc_after_break
|
breakpoint_pc = read_pc_pid (ecs->ptid) - gdbarch_decr_pc_after_break
|
(current_gdbarch);
|
(current_gdbarch);
|
|
|
/* Check whether there actually is a software breakpoint inserted
|
/* Check whether there actually is a software breakpoint inserted
|
at that location. */
|
at that location. */
|
if (software_breakpoint_inserted_here_p (breakpoint_pc))
|
if (software_breakpoint_inserted_here_p (breakpoint_pc))
|
{
|
{
|
/* When using hardware single-step, a SIGTRAP is reported for both
|
/* When using hardware single-step, a SIGTRAP is reported for both
|
a completed single-step and a software breakpoint. Need to
|
a completed single-step and a software breakpoint. Need to
|
differentiate between the two, as the latter needs adjusting
|
differentiate between the two, as the latter needs adjusting
|
but the former does not.
|
but the former does not.
|
|
|
The SIGTRAP can be due to a completed hardware single-step only if
|
The SIGTRAP can be due to a completed hardware single-step only if
|
- we didn't insert software single-step breakpoints
|
- we didn't insert software single-step breakpoints
|
- the thread to be examined is still the current thread
|
- the thread to be examined is still the current thread
|
- this thread is currently being stepped
|
- this thread is currently being stepped
|
|
|
If any of these events did not occur, we must have stopped due
|
If any of these events did not occur, we must have stopped due
|
to hitting a software breakpoint, and have to back up to the
|
to hitting a software breakpoint, and have to back up to the
|
breakpoint address.
|
breakpoint address.
|
|
|
As a special case, we could have hardware single-stepped a
|
As a special case, we could have hardware single-stepped a
|
software breakpoint. In this case (prev_pc == breakpoint_pc),
|
software breakpoint. In this case (prev_pc == breakpoint_pc),
|
we also need to back up to the breakpoint address. */
|
we also need to back up to the breakpoint address. */
|
|
|
if (singlestep_breakpoints_inserted_p
|
if (singlestep_breakpoints_inserted_p
|
|| !ptid_equal (ecs->ptid, inferior_ptid)
|
|| !ptid_equal (ecs->ptid, inferior_ptid)
|
|| !currently_stepping (ecs)
|
|| !currently_stepping (ecs)
|
|| prev_pc == breakpoint_pc)
|
|| prev_pc == breakpoint_pc)
|
write_pc_pid (breakpoint_pc, ecs->ptid);
|
write_pc_pid (breakpoint_pc, ecs->ptid);
|
}
|
}
|
}
|
}
|
|
|
/* 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)
|
{
|
{
|
int sw_single_step_trap_p = 0;
|
int sw_single_step_trap_p = 0;
|
int stopped_by_watchpoint;
|
int stopped_by_watchpoint;
|
int stepped_after_stopped_by_watchpoint = 0;
|
int stepped_after_stopped_by_watchpoint = 0;
|
|
|
/* Cache the last pid/waitstatus. */
|
/* Cache the last pid/waitstatus. */
|
target_last_wait_ptid = ecs->ptid;
|
target_last_wait_ptid = ecs->ptid;
|
target_last_waitstatus = *ecs->wp;
|
target_last_waitstatus = *ecs->wp;
|
|
|
/* Always clear state belonging to the previous time we stopped. */
|
/* Always clear state belonging to the previous time we stopped. */
|
stop_stack_dummy = 0;
|
stop_stack_dummy = 0;
|
|
|
adjust_pc_after_break (ecs);
|
adjust_pc_after_break (ecs);
|
|
|
switch (ecs->infwait_state)
|
switch (ecs->infwait_state)
|
{
|
{
|
case infwait_thread_hop_state:
|
case infwait_thread_hop_state:
|
if (debug_infrun)
|
if (debug_infrun)
|
fprintf_unfiltered (gdb_stdlog, "infrun: infwait_thread_hop_state\n");
|
fprintf_unfiltered (gdb_stdlog, "infrun: infwait_thread_hop_state\n");
|
/* Cancel the waiton_ptid. */
|
/* Cancel the waiton_ptid. */
|
ecs->waiton_ptid = pid_to_ptid (-1);
|
ecs->waiton_ptid = pid_to_ptid (-1);
|
break;
|
break;
|
|
|
case infwait_normal_state:
|
case infwait_normal_state:
|
if (debug_infrun)
|
if (debug_infrun)
|
fprintf_unfiltered (gdb_stdlog, "infrun: infwait_normal_state\n");
|
fprintf_unfiltered (gdb_stdlog, "infrun: infwait_normal_state\n");
|
break;
|
break;
|
|
|
case infwait_step_watch_state:
|
case infwait_step_watch_state:
|
if (debug_infrun)
|
if (debug_infrun)
|
fprintf_unfiltered (gdb_stdlog,
|
fprintf_unfiltered (gdb_stdlog,
|
"infrun: infwait_step_watch_state\n");
|
"infrun: infwait_step_watch_state\n");
|
|
|
stepped_after_stopped_by_watchpoint = 1;
|
stepped_after_stopped_by_watchpoint = 1;
|
break;
|
break;
|
|
|
case infwait_nonstep_watch_state:
|
case infwait_nonstep_watch_state:
|
if (debug_infrun)
|
if (debug_infrun)
|
fprintf_unfiltered (gdb_stdlog,
|
fprintf_unfiltered (gdb_stdlog,
|
"infrun: infwait_nonstep_watch_state\n");
|
"infrun: infwait_nonstep_watch_state\n");
|
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;
|
|
|
default:
|
default:
|
internal_error (__FILE__, __LINE__, _("bad switch"));
|
internal_error (__FILE__, __LINE__, _("bad switch"));
|
}
|
}
|
ecs->infwait_state = infwait_normal_state;
|
ecs->infwait_state = infwait_normal_state;
|
|
|
reinit_frame_cache ();
|
reinit_frame_cache ();
|
|
|
/* 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 = (!ptid_equal (ecs->ptid, inferior_ptid)
|
ecs->new_thread_event = (!ptid_equal (ecs->ptid, inferior_ptid)
|
&& !ptid_equal (ecs->ptid, minus_one_ptid)
|
&& !ptid_equal (ecs->ptid, minus_one_ptid)
|
&& !in_thread_list (ecs->ptid));
|
&& !in_thread_list (ecs->ptid));
|
|
|
if (ecs->ws.kind != TARGET_WAITKIND_EXITED
|
if (ecs->ws.kind != TARGET_WAITKIND_EXITED
|
&& ecs->ws.kind != TARGET_WAITKIND_SIGNALLED && ecs->new_thread_event)
|
&& ecs->ws.kind != TARGET_WAITKIND_SIGNALLED && ecs->new_thread_event)
|
add_thread (ecs->ptid);
|
add_thread (ecs->ptid);
|
|
|
switch (ecs->ws.kind)
|
switch (ecs->ws.kind)
|
{
|
{
|
case TARGET_WAITKIND_LOADED:
|
case TARGET_WAITKIND_LOADED:
|
if (debug_infrun)
|
if (debug_infrun)
|
fprintf_unfiltered (gdb_stdlog, "infrun: TARGET_WAITKIND_LOADED\n");
|
fprintf_unfiltered (gdb_stdlog, "infrun: TARGET_WAITKIND_LOADED\n");
|
/* Ignore gracefully during startup of the inferior, as it might
|
/* Ignore gracefully during startup of the inferior, as it might
|
be the shell which has just loaded some objects, otherwise
|
be the shell which has just loaded some objects, otherwise
|
add the symbols for the newly loaded objects. Also ignore at
|
add the symbols for the newly loaded objects. Also ignore at
|
the beginning of an attach or remote session; we will query
|
the beginning of an attach or remote session; we will query
|
the full list of libraries once the connection is
|
the full list of libraries once the connection is
|
established. */
|
established. */
|
if (stop_soon == NO_STOP_QUIETLY)
|
if (stop_soon == NO_STOP_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. */
|
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. Switch
|
supposed to be adding them automatically. Switch
|
terminal for any messages produced by
|
terminal for any messages produced by
|
breakpoint_re_set. */
|
breakpoint_re_set. */
|
target_terminal_ours_for_output ();
|
target_terminal_ours_for_output ();
|
/* NOTE: cagney/2003-11-25: Make certain that the target
|
/* NOTE: cagney/2003-11-25: Make certain that the target
|
stack's section table is kept up-to-date. Architectures,
|
stack's section table is kept up-to-date. Architectures,
|
(e.g., PPC64), use the section table to perform
|
(e.g., PPC64), use the section table to perform
|
operations such as address => section name and hence
|
operations such as address => section name and hence
|
require the table to contain all sections (including
|
require the table to contain all sections (including
|
those found in shared libraries). */
|
those found in shared libraries). */
|
/* NOTE: cagney/2003-11-25: Pass current_target and not
|
/* NOTE: cagney/2003-11-25: Pass current_target and not
|
exec_ops to SOLIB_ADD. This is because current GDB is
|
exec_ops to SOLIB_ADD. This is because current GDB is
|
only tooled to propagate section_table changes out from
|
only tooled to propagate section_table changes out from
|
the "current_target" (see target_resize_to_sections), and
|
the "current_target" (see target_resize_to_sections), and
|
not up from the exec stratum. This, of course, isn't
|
not up from the exec stratum. This, of course, isn't
|
right. "infrun.c" should only interact with the
|
right. "infrun.c" should only interact with the
|
exec/process stratum, instead relying on the target stack
|
exec/process stratum, instead relying on the target stack
|
to propagate relevant changes (stop, section table
|
to propagate relevant changes (stop, section table
|
changed, ...) up to other layers. */
|
changed, ...) up to other layers. */
|
#ifdef SOLIB_ADD
|
#ifdef SOLIB_ADD
|
SOLIB_ADD (NULL, 0, ¤t_target, auto_solib_add);
|
SOLIB_ADD (NULL, 0, ¤t_target, auto_solib_add);
|
#else
|
#else
|
solib_add (NULL, 0, ¤t_target, auto_solib_add);
|
solib_add (NULL, 0, ¤t_target, auto_solib_add);
|
#endif
|
#endif
|
target_terminal_inferior ();
|
target_terminal_inferior ();
|
|
|
/* 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;
|
}
|
}
|
|
|
/* NOTE drow/2007-05-11: This might be a good place to check
|
/* NOTE drow/2007-05-11: This might be a good place to check
|
for "catch load". */
|
for "catch load". */
|
|
|
/* Reinsert breakpoints and continue. */
|
/* Reinsert breakpoints and continue. */
|
insert_breakpoints ();
|
insert_breakpoints ();
|
}
|
}
|
|
|
/* If we are skipping through a shell, or through shared library
|
/* If we are skipping through a shell, or through shared library
|
loading that we aren't interested in, resume the program. If
|
loading that we aren't interested in, resume the program. If
|
we're running the program normally, also resume. But stop if
|
we're running the program normally, also resume. But stop if
|
we're attaching or setting up a remote connection. */
|
we're attaching or setting up a remote connection. */
|
if (stop_soon == STOP_QUIETLY || stop_soon == NO_STOP_QUIETLY)
|
if (stop_soon == STOP_QUIETLY || stop_soon == NO_STOP_QUIETLY)
|
{
|
{
|
resume (0, TARGET_SIGNAL_0);
|
resume (0, TARGET_SIGNAL_0);
|
prepare_to_wait (ecs);
|
prepare_to_wait (ecs);
|
return;
|
return;
|
}
|
}
|
|
|
break;
|
break;
|
|
|
case TARGET_WAITKIND_SPURIOUS:
|
case TARGET_WAITKIND_SPURIOUS:
|
if (debug_infrun)
|
if (debug_infrun)
|
fprintf_unfiltered (gdb_stdlog, "infrun: TARGET_WAITKIND_SPURIOUS\n");
|
fprintf_unfiltered (gdb_stdlog, "infrun: TARGET_WAITKIND_SPURIOUS\n");
|
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:
|
if (debug_infrun)
|
if (debug_infrun)
|
fprintf_unfiltered (gdb_stdlog, "infrun: TARGET_WAITKIND_EXITED\n");
|
fprintf_unfiltered (gdb_stdlog, "infrun: TARGET_WAITKIND_EXITED\n");
|
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;
|
singlestep_breakpoints_inserted_p = 0;
|
stop_print_frame = 0;
|
stop_print_frame = 0;
|
stop_stepping (ecs);
|
stop_stepping (ecs);
|
return;
|
return;
|
|
|
case TARGET_WAITKIND_SIGNALLED:
|
case TARGET_WAITKIND_SIGNALLED:
|
if (debug_infrun)
|
if (debug_infrun)
|
fprintf_unfiltered (gdb_stdlog, "infrun: TARGET_WAITKIND_SIGNALLED\n");
|
fprintf_unfiltered (gdb_stdlog, "infrun: TARGET_WAITKIND_SIGNALLED\n");
|
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;
|
singlestep_breakpoints_inserted_p = 0;
|
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:
|
case TARGET_WAITKIND_VFORKED:
|
case TARGET_WAITKIND_VFORKED:
|
if (debug_infrun)
|
if (debug_infrun)
|
fprintf_unfiltered (gdb_stdlog, "infrun: TARGET_WAITKIND_FORKED\n");
|
fprintf_unfiltered (gdb_stdlog, "infrun: TARGET_WAITKIND_FORKED\n");
|
stop_signal = TARGET_SIGNAL_TRAP;
|
stop_signal = TARGET_SIGNAL_TRAP;
|
pending_follow.kind = ecs->ws.kind;
|
pending_follow.kind = ecs->ws.kind;
|
|
|
pending_follow.fork_event.parent_pid = PIDGET (ecs->ptid);
|
pending_follow.fork_event.parent_pid = PIDGET (ecs->ptid);
|
pending_follow.fork_event.child_pid = ecs->ws.value.related_pid;
|
pending_follow.fork_event.child_pid = ecs->ws.value.related_pid;
|
|
|
if (!ptid_equal (ecs->ptid, inferior_ptid))
|
if (!ptid_equal (ecs->ptid, inferior_ptid))
|
{
|
{
|
context_switch (ecs);
|
context_switch (ecs);
|
reinit_frame_cache ();
|
reinit_frame_cache ();
|
}
|
}
|
|
|
stop_pc = read_pc ();
|
stop_pc = read_pc ();
|
|
|
stop_bpstat = bpstat_stop_status (stop_pc, ecs->ptid);
|
stop_bpstat = bpstat_stop_status (stop_pc, ecs->ptid);
|
|
|
ecs->random_signal = !bpstat_explains_signal (stop_bpstat);
|
ecs->random_signal = !bpstat_explains_signal (stop_bpstat);
|
|
|
/* If no catchpoint triggered for this, then keep going. */
|
/* If no catchpoint triggered for this, then keep going. */
|
if (ecs->random_signal)
|
if (ecs->random_signal)
|
{
|
{
|
stop_signal = TARGET_SIGNAL_0;
|
stop_signal = TARGET_SIGNAL_0;
|
keep_going (ecs);
|
keep_going (ecs);
|
return;
|
return;
|
}
|
}
|
goto process_event_stop_test;
|
goto process_event_stop_test;
|
|
|
case TARGET_WAITKIND_EXECD:
|
case TARGET_WAITKIND_EXECD:
|
if (debug_infrun)
|
if (debug_infrun)
|
fprintf_unfiltered (gdb_stdlog, "infrun: TARGET_WAITKIND_EXECD\n");
|
fprintf_unfiltered (gdb_stdlog, "infrun: TARGET_WAITKIND_EXECD\n");
|
stop_signal = TARGET_SIGNAL_TRAP;
|
stop_signal = TARGET_SIGNAL_TRAP;
|
|
|
/* NOTE drow/2002-12-05: This code should be pushed down into the
|
/* NOTE drow/2002-12-05: This code should be pushed down into the
|
target_wait function. Until then following vfork on HP/UX 10.20
|
target_wait function. Until then following vfork on HP/UX 10.20
|
is probably broken by this. Of course, it's broken anyway. */
|
is probably broken by this. Of course, it's broken anyway. */
|
/* 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--;
|
target_resume (ecs->ptid, 0, TARGET_SIGNAL_0);
|
target_resume (ecs->ptid, 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));
|
|
|
/* 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 (PIDGET (inferior_ptid), pending_follow.execd_pathname);
|
follow_exec (PIDGET (inferior_ptid), pending_follow.execd_pathname);
|
xfree (pending_follow.execd_pathname);
|
xfree (pending_follow.execd_pathname);
|
|
|
stop_pc = read_pc_pid (ecs->ptid);
|
stop_pc = read_pc_pid (ecs->ptid);
|
ecs->saved_inferior_ptid = inferior_ptid;
|
ecs->saved_inferior_ptid = inferior_ptid;
|
inferior_ptid = ecs->ptid;
|
inferior_ptid = ecs->ptid;
|
|
|
stop_bpstat = bpstat_stop_status (stop_pc, ecs->ptid);
|
stop_bpstat = bpstat_stop_status (stop_pc, ecs->ptid);
|
|
|
ecs->random_signal = !bpstat_explains_signal (stop_bpstat);
|
ecs->random_signal = !bpstat_explains_signal (stop_bpstat);
|
inferior_ptid = ecs->saved_inferior_ptid;
|
inferior_ptid = ecs->saved_inferior_ptid;
|
|
|
if (!ptid_equal (ecs->ptid, inferior_ptid))
|
if (!ptid_equal (ecs->ptid, inferior_ptid))
|
{
|
{
|
context_switch (ecs);
|
context_switch (ecs);
|
reinit_frame_cache ();
|
reinit_frame_cache ();
|
}
|
}
|
|
|
/* If no catchpoint triggered for this, then keep going. */
|
/* If no catchpoint triggered for this, then keep going. */
|
if (ecs->random_signal)
|
if (ecs->random_signal)
|
{
|
{
|
stop_signal = TARGET_SIGNAL_0;
|
stop_signal = TARGET_SIGNAL_0;
|
keep_going (ecs);
|
keep_going (ecs);
|
return;
|
return;
|
}
|
}
|
goto process_event_stop_test;
|
goto process_event_stop_test;
|
|
|
/* Be careful not to try to gather much state about a thread
|
/* 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:
|
if (debug_infrun)
|
if (debug_infrun)
|
fprintf_unfiltered (gdb_stdlog, "infrun: TARGET_WAITKIND_SYSCALL_ENTRY\n");
|
fprintf_unfiltered (gdb_stdlog, "infrun: TARGET_WAITKIND_SYSCALL_ENTRY\n");
|
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.) */
|
case TARGET_WAITKIND_SYSCALL_RETURN:
|
case TARGET_WAITKIND_SYSCALL_RETURN:
|
if (debug_infrun)
|
if (debug_infrun)
|
fprintf_unfiltered (gdb_stdlog, "infrun: TARGET_WAITKIND_SYSCALL_RETURN\n");
|
fprintf_unfiltered (gdb_stdlog, "infrun: TARGET_WAITKIND_SYSCALL_RETURN\n");
|
target_resume (ecs->ptid, 1, TARGET_SIGNAL_0);
|
target_resume (ecs->ptid, 1, TARGET_SIGNAL_0);
|
prepare_to_wait (ecs);
|
prepare_to_wait (ecs);
|
return;
|
return;
|
|
|
case TARGET_WAITKIND_STOPPED:
|
case TARGET_WAITKIND_STOPPED:
|
if (debug_infrun)
|
if (debug_infrun)
|
fprintf_unfiltered (gdb_stdlog, "infrun: TARGET_WAITKIND_STOPPED\n");
|
fprintf_unfiltered (gdb_stdlog, "infrun: TARGET_WAITKIND_STOPPED\n");
|
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.
|
done what needs to be done, if anything.
|
|
|
One of the possible circumstances for this is when the
|
One of the possible circumstances for this 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. Another possible
|
not stopped, and we are ignoring the event. Another possible
|
circumstance is any event which the lower level knows will be
|
circumstance is any event which the lower level knows will be
|
reported multiple times without an intervening resume. */
|
reported multiple times without an intervening resume. */
|
case TARGET_WAITKIND_IGNORE:
|
case TARGET_WAITKIND_IGNORE:
|
if (debug_infrun)
|
if (debug_infrun)
|
fprintf_unfiltered (gdb_stdlog, "infrun: TARGET_WAITKIND_IGNORE\n");
|
fprintf_unfiltered (gdb_stdlog, "infrun: TARGET_WAITKIND_IGNORE\n");
|
prepare_to_wait (ecs);
|
prepare_to_wait (ecs);
|
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 (RESUME_ALL, 0, TARGET_SIGNAL_0);
|
target_resume (RESUME_ALL, 0, TARGET_SIGNAL_0);
|
prepare_to_wait (ecs);
|
prepare_to_wait (ecs);
|
return;
|
return;
|
}
|
}
|
|
|
stop_pc = read_pc_pid (ecs->ptid);
|
stop_pc = read_pc_pid (ecs->ptid);
|
|
|
if (debug_infrun)
|
if (debug_infrun)
|
fprintf_unfiltered (gdb_stdlog, "infrun: stop_pc = 0x%s\n", paddr_nz (stop_pc));
|
fprintf_unfiltered (gdb_stdlog, "infrun: stop_pc = 0x%s\n", paddr_nz (stop_pc));
|
|
|
if (stepping_past_singlestep_breakpoint)
|
if (stepping_past_singlestep_breakpoint)
|
{
|
{
|
gdb_assert (singlestep_breakpoints_inserted_p);
|
gdb_assert (singlestep_breakpoints_inserted_p);
|
gdb_assert (ptid_equal (singlestep_ptid, ecs->ptid));
|
gdb_assert (ptid_equal (singlestep_ptid, ecs->ptid));
|
gdb_assert (!ptid_equal (singlestep_ptid, saved_singlestep_ptid));
|
gdb_assert (!ptid_equal (singlestep_ptid, saved_singlestep_ptid));
|
|
|
stepping_past_singlestep_breakpoint = 0;
|
stepping_past_singlestep_breakpoint = 0;
|
|
|
/* We've either finished single-stepping past the single-step
|
/* We've either finished single-stepping past the single-step
|
breakpoint, or stopped for some other reason. It would be nice if
|
breakpoint, or stopped for some other reason. It would be nice if
|
we could tell, but we can't reliably. */
|
we could tell, but we can't reliably. */
|
if (stop_signal == TARGET_SIGNAL_TRAP)
|
if (stop_signal == TARGET_SIGNAL_TRAP)
|
{
|
{
|
if (debug_infrun)
|
if (debug_infrun)
|
fprintf_unfiltered (gdb_stdlog, "infrun: stepping_past_singlestep_breakpoint\n");
|
fprintf_unfiltered (gdb_stdlog, "infrun: stepping_past_singlestep_breakpoint\n");
|
/* Pull the single step breakpoints out of the target. */
|
/* Pull the single step breakpoints out of the target. */
|
remove_single_step_breakpoints ();
|
remove_single_step_breakpoints ();
|
singlestep_breakpoints_inserted_p = 0;
|
singlestep_breakpoints_inserted_p = 0;
|
|
|
ecs->random_signal = 0;
|
ecs->random_signal = 0;
|
|
|
ecs->ptid = saved_singlestep_ptid;
|
ecs->ptid = saved_singlestep_ptid;
|
context_switch (ecs);
|
context_switch (ecs);
|
if (deprecated_context_hook)
|
if (deprecated_context_hook)
|
deprecated_context_hook (pid_to_thread_id (ecs->ptid));
|
deprecated_context_hook (pid_to_thread_id (ecs->ptid));
|
|
|
resume (1, TARGET_SIGNAL_0);
|
resume (1, TARGET_SIGNAL_0);
|
prepare_to_wait (ecs);
|
prepare_to_wait (ecs);
|
return;
|
return;
|
}
|
}
|
}
|
}
|
|
|
stepping_past_singlestep_breakpoint = 0;
|
stepping_past_singlestep_breakpoint = 0;
|
|
|
if (!ptid_equal (deferred_step_ptid, null_ptid))
|
if (!ptid_equal (deferred_step_ptid, null_ptid))
|
{
|
{
|
/* If we stopped for some other reason than single-stepping, ignore
|
/* If we stopped for some other reason than single-stepping, ignore
|
the fact that we were supposed to switch back. */
|
the fact that we were supposed to switch back. */
|
if (stop_signal == TARGET_SIGNAL_TRAP)
|
if (stop_signal == TARGET_SIGNAL_TRAP)
|
{
|
{
|
if (debug_infrun)
|
if (debug_infrun)
|
fprintf_unfiltered (gdb_stdlog,
|
fprintf_unfiltered (gdb_stdlog,
|
"infrun: handling deferred step\n");
|
"infrun: handling deferred step\n");
|
|
|
/* Pull the single step breakpoints out of the target. */
|
/* Pull the single step breakpoints out of the target. */
|
if (singlestep_breakpoints_inserted_p)
|
if (singlestep_breakpoints_inserted_p)
|
{
|
{
|
remove_single_step_breakpoints ();
|
remove_single_step_breakpoints ();
|
singlestep_breakpoints_inserted_p = 0;
|
singlestep_breakpoints_inserted_p = 0;
|
}
|
}
|
|
|
/* Note: We do not call context_switch at this point, as the
|
/* Note: We do not call context_switch at this point, as the
|
context is already set up for stepping the original thread. */
|
context is already set up for stepping the original thread. */
|
switch_to_thread (deferred_step_ptid);
|
switch_to_thread (deferred_step_ptid);
|
deferred_step_ptid = null_ptid;
|
deferred_step_ptid = null_ptid;
|
/* Suppress spurious "Switching to ..." message. */
|
/* Suppress spurious "Switching to ..." message. */
|
previous_inferior_ptid = inferior_ptid;
|
previous_inferior_ptid = inferior_ptid;
|
|
|
resume (1, TARGET_SIGNAL_0);
|
resume (1, TARGET_SIGNAL_0);
|
prepare_to_wait (ecs);
|
prepare_to_wait (ecs);
|
return;
|
return;
|
}
|
}
|
|
|
deferred_step_ptid = null_ptid;
|
deferred_step_ptid = null_ptid;
|
}
|
}
|
|
|
/* 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)
|
{
|
{
|
int thread_hop_needed = 0;
|
int thread_hop_needed = 0;
|
|
|
/* Check if a regular breakpoint has been hit before checking
|
/* Check if a regular breakpoint has been hit before checking
|
for a potential single step breakpoint. Otherwise, GDB will
|
for a potential single step breakpoint. Otherwise, GDB will
|
not see this breakpoint hit when stepping onto breakpoints. */
|
not see this breakpoint hit when stepping onto breakpoints. */
|
if (regular_breakpoint_inserted_here_p (stop_pc))
|
if (regular_breakpoint_inserted_here_p (stop_pc))
|
{
|
{
|
ecs->random_signal = 0;
|
ecs->random_signal = 0;
|
if (!breakpoint_thread_match (stop_pc, ecs->ptid))
|
if (!breakpoint_thread_match (stop_pc, ecs->ptid))
|
thread_hop_needed = 1;
|
thread_hop_needed = 1;
|
}
|
}
|
else if (singlestep_breakpoints_inserted_p)
|
else if (singlestep_breakpoints_inserted_p)
|
{
|
{
|
/* We have not context switched yet, so this should be true
|
/* We have not context switched yet, so this should be true
|
no matter which thread hit the singlestep breakpoint. */
|
no matter which thread hit the singlestep breakpoint. */
|
gdb_assert (ptid_equal (inferior_ptid, singlestep_ptid));
|
gdb_assert (ptid_equal (inferior_ptid, singlestep_ptid));
|
if (debug_infrun)
|
if (debug_infrun)
|
fprintf_unfiltered (gdb_stdlog, "infrun: software single step "
|
fprintf_unfiltered (gdb_stdlog, "infrun: software single step "
|
"trap for %s\n",
|
"trap for %s\n",
|
target_pid_to_str (ecs->ptid));
|
target_pid_to_str (ecs->ptid));
|
|
|
ecs->random_signal = 0;
|
ecs->random_signal = 0;
|
/* The call to in_thread_list is necessary because PTIDs sometimes
|
/* The call to in_thread_list is necessary because PTIDs sometimes
|
change when we go from single-threaded to multi-threaded. If
|
change when we go from single-threaded to multi-threaded. If
|
the singlestep_ptid is still in the list, assume that it is
|
the singlestep_ptid is still in the list, assume that it is
|
really different from ecs->ptid. */
|
really different from ecs->ptid. */
|
if (!ptid_equal (singlestep_ptid, ecs->ptid)
|
if (!ptid_equal (singlestep_ptid, ecs->ptid)
|
&& in_thread_list (singlestep_ptid))
|
&& in_thread_list (singlestep_ptid))
|
{
|
{
|
/* If the PC of the thread we were trying to single-step
|
/* If the PC of the thread we were trying to single-step
|
has changed, discard this event (which we were going
|
has changed, discard this event (which we were going
|
to ignore anyway), and pretend we saw that thread
|
to ignore anyway), and pretend we saw that thread
|
trap. This prevents us continuously moving the
|
trap. This prevents us continuously moving the
|
single-step breakpoint forward, one instruction at a
|
single-step breakpoint forward, one instruction at a
|
time. If the PC has changed, then the thread we were
|
time. If the PC has changed, then the thread we were
|
trying to single-step has trapped or been signalled,
|
trying to single-step has trapped or been signalled,
|
but the event has not been reported to GDB yet.
|
but the event has not been reported to GDB yet.
|
|
|
There might be some cases where this loses signal
|
There might be some cases where this loses signal
|
information, if a signal has arrived at exactly the
|
information, if a signal has arrived at exactly the
|
same time that the PC changed, but this is the best
|
same time that the PC changed, but this is the best
|
we can do with the information available. Perhaps we
|
we can do with the information available. Perhaps we
|
should arrange to report all events for all threads
|
should arrange to report all events for all threads
|
when they stop, or to re-poll the remote looking for
|
when they stop, or to re-poll the remote looking for
|
this particular thread (i.e. temporarily enable
|
this particular thread (i.e. temporarily enable
|
schedlock). */
|
schedlock). */
|
if (read_pc_pid (singlestep_ptid) != singlestep_pc)
|
if (read_pc_pid (singlestep_ptid) != singlestep_pc)
|
{
|
{
|
if (debug_infrun)
|
if (debug_infrun)
|
fprintf_unfiltered (gdb_stdlog, "infrun: unexpected thread,"
|
fprintf_unfiltered (gdb_stdlog, "infrun: unexpected thread,"
|
" but expected thread advanced also\n");
|
" but expected thread advanced also\n");
|
|
|
/* The current context still belongs to
|
/* The current context still belongs to
|
singlestep_ptid. Don't swap here, since that's
|
singlestep_ptid. Don't swap here, since that's
|
the context we want to use. Just fudge our
|
the context we want to use. Just fudge our
|
state and continue. */
|
state and continue. */
|
ecs->ptid = singlestep_ptid;
|
ecs->ptid = singlestep_ptid;
|
stop_pc = read_pc_pid (ecs->ptid);
|
stop_pc = read_pc_pid (ecs->ptid);
|
}
|
}
|
else
|
else
|
{
|
{
|
if (debug_infrun)
|
if (debug_infrun)
|
fprintf_unfiltered (gdb_stdlog,
|
fprintf_unfiltered (gdb_stdlog,
|
"infrun: unexpected thread\n");
|
"infrun: unexpected thread\n");
|
|
|
thread_hop_needed = 1;
|
thread_hop_needed = 1;
|
stepping_past_singlestep_breakpoint = 1;
|
stepping_past_singlestep_breakpoint = 1;
|
saved_singlestep_ptid = singlestep_ptid;
|
saved_singlestep_ptid = singlestep_ptid;
|
}
|
}
|
}
|
}
|
}
|
}
|
|
|
if (thread_hop_needed)
|
if (thread_hop_needed)
|
{
|
{
|
int remove_status;
|
int remove_status;
|
|
|
if (debug_infrun)
|
if (debug_infrun)
|
fprintf_unfiltered (gdb_stdlog, "infrun: thread_hop_needed\n");
|
fprintf_unfiltered (gdb_stdlog, "infrun: thread_hop_needed\n");
|
|
|
/* 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. */
|
|
|
if (singlestep_breakpoints_inserted_p)
|
if (singlestep_breakpoints_inserted_p)
|
{
|
{
|
/* Pull the single step breakpoints out of the target. */
|
/* Pull the single step breakpoints out of the target. */
|
remove_single_step_breakpoints ();
|
remove_single_step_breakpoints ();
|
singlestep_breakpoints_inserted_p = 0;
|
singlestep_breakpoints_inserted_p = 0;
|
}
|
}
|
|
|
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)
|
error (_("Cannot step over breakpoint hit in wrong thread"));
|
error (_("Cannot step over breakpoint hit in wrong thread"));
|
else
|
else
|
{ /* Single step */
|
{ /* Single step */
|
if (!ptid_equal (inferior_ptid, ecs->ptid))
|
if (!ptid_equal (inferior_ptid, ecs->ptid))
|
context_switch (ecs);
|
context_switch (ecs);
|
ecs->waiton_ptid = ecs->ptid;
|
ecs->waiton_ptid = ecs->ptid;
|
ecs->wp = &(ecs->ws);
|
ecs->wp = &(ecs->ws);
|
ecs->stepping_over_breakpoint = 1;
|
ecs->stepping_over_breakpoint = 1;
|
|
|
ecs->infwait_state = infwait_thread_hop_state;
|
ecs->infwait_state = infwait_thread_hop_state;
|
keep_going (ecs);
|
keep_going (ecs);
|
registers_changed ();
|
registers_changed ();
|
return;
|
return;
|
}
|
}
|
}
|
}
|
else if (singlestep_breakpoints_inserted_p)
|
else if (singlestep_breakpoints_inserted_p)
|
{
|
{
|
sw_single_step_trap_p = 1;
|
sw_single_step_trap_p = 1;
|
ecs->random_signal = 0;
|
ecs->random_signal = 0;
|
}
|
}
|
}
|
}
|
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. */
|
so, then switch to that thread. */
|
if (!ptid_equal (ecs->ptid, inferior_ptid))
|
if (!ptid_equal (ecs->ptid, inferior_ptid))
|
{
|
{
|
if (debug_infrun)
|
if (debug_infrun)
|
fprintf_unfiltered (gdb_stdlog, "infrun: context switch\n");
|
fprintf_unfiltered (gdb_stdlog, "infrun: context switch\n");
|
|
|
context_switch (ecs);
|
context_switch (ecs);
|
|
|
if (deprecated_context_hook)
|
if (deprecated_context_hook)
|
deprecated_context_hook (pid_to_thread_id (ecs->ptid));
|
deprecated_context_hook (pid_to_thread_id (ecs->ptid));
|
}
|
}
|
|
|
if (singlestep_breakpoints_inserted_p)
|
if (singlestep_breakpoints_inserted_p)
|
{
|
{
|
/* Pull the single step breakpoints out of the target. */
|
/* Pull the single step breakpoints out of the target. */
|
remove_single_step_breakpoints ();
|
remove_single_step_breakpoints ();
|
singlestep_breakpoints_inserted_p = 0;
|
singlestep_breakpoints_inserted_p = 0;
|
}
|
}
|
|
|
if (stepped_after_stopped_by_watchpoint)
|
if (stepped_after_stopped_by_watchpoint)
|
stopped_by_watchpoint = 0;
|
stopped_by_watchpoint = 0;
|
else
|
else
|
stopped_by_watchpoint = watchpoints_triggered (&ecs->ws);
|
stopped_by_watchpoint = watchpoints_triggered (&ecs->ws);
|
|
|
/* If necessary, step over this watchpoint. We'll be back to display
|
/* If necessary, step over this watchpoint. We'll be back to display
|
it in a moment. */
|
it in a moment. */
|
if (stopped_by_watchpoint
|
if (stopped_by_watchpoint
|
&& (HAVE_STEPPABLE_WATCHPOINT
|
&& (HAVE_STEPPABLE_WATCHPOINT
|
|| gdbarch_have_nonsteppable_watchpoint (current_gdbarch)))
|
|| gdbarch_have_nonsteppable_watchpoint (current_gdbarch)))
|
{
|
{
|
if (debug_infrun)
|
if (debug_infrun)
|
fprintf_unfiltered (gdb_stdlog, "infrun: STOPPED_BY_WATCHPOINT\n");
|
fprintf_unfiltered (gdb_stdlog, "infrun: STOPPED_BY_WATCHPOINT\n");
|
|
|
/* 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. We do this by single-stepping the
|
watchpoint expression. We do this by single-stepping the
|
target.
|
target.
|
|
|
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.
|
|
|
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. If we have non-steppable watchpoints,
|
the inferior over it. If we have non-steppable watchpoints,
|
we must disable the current watchpoint; it's simplest to
|
we must disable the current watchpoint; it's simplest to
|
disable all watchpoints and breakpoints. */
|
disable all watchpoints and breakpoints. */
|
|
|
if (!HAVE_STEPPABLE_WATCHPOINT)
|
if (!HAVE_STEPPABLE_WATCHPOINT)
|
remove_breakpoints ();
|
remove_breakpoints ();
|
registers_changed ();
|
registers_changed ();
|
target_resume (ecs->ptid, 1, TARGET_SIGNAL_0); /* Single step */
|
target_resume (ecs->ptid, 1, TARGET_SIGNAL_0); /* Single step */
|
ecs->waiton_ptid = ecs->ptid;
|
ecs->waiton_ptid = ecs->ptid;
|
if (HAVE_STEPPABLE_WATCHPOINT)
|
if (HAVE_STEPPABLE_WATCHPOINT)
|
ecs->infwait_state = infwait_step_watch_state;
|
ecs->infwait_state = infwait_step_watch_state;
|
else
|
else
|
ecs->infwait_state = infwait_nonstep_watch_state;
|
ecs->infwait_state = infwait_nonstep_watch_state;
|
prepare_to_wait (ecs);
|
prepare_to_wait (ecs);
|
return;
|
return;
|
}
|
}
|
|
|
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
|
ecs->stop_func_start
|
+= gdbarch_deprecated_function_start_offset (current_gdbarch);
|
+= gdbarch_deprecated_function_start_offset (current_gdbarch);
|
ecs->stepping_over_breakpoint = 0;
|
ecs->stepping_over_breakpoint = 0;
|
bpstat_clear (&stop_bpstat);
|
bpstat_clear (&stop_bpstat);
|
stop_step = 0;
|
stop_step = 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;
|
|
|
if (stop_signal == TARGET_SIGNAL_TRAP
|
if (stop_signal == TARGET_SIGNAL_TRAP
|
&& stepping_over_breakpoint
|
&& stepping_over_breakpoint
|
&& gdbarch_single_step_through_delay_p (current_gdbarch)
|
&& gdbarch_single_step_through_delay_p (current_gdbarch)
|
&& currently_stepping (ecs))
|
&& currently_stepping (ecs))
|
{
|
{
|
/* We're trying to step off a breakpoint. Turns out that we're
|
/* We're trying to step off a breakpoint. Turns out that we're
|
also on an instruction that needs to be stepped multiple
|
also on an instruction that needs to be stepped multiple
|
times before it's been fully executing. E.g., architectures
|
times before it's been fully executing. E.g., architectures
|
with a delay slot. It needs to be stepped twice, once for
|
with a delay slot. It needs to be stepped twice, once for
|
the instruction and once for the delay slot. */
|
the instruction and once for the delay slot. */
|
int step_through_delay
|
int step_through_delay
|
= gdbarch_single_step_through_delay (current_gdbarch,
|
= gdbarch_single_step_through_delay (current_gdbarch,
|
get_current_frame ());
|
get_current_frame ());
|
if (debug_infrun && step_through_delay)
|
if (debug_infrun && step_through_delay)
|
fprintf_unfiltered (gdb_stdlog, "infrun: step through delay\n");
|
fprintf_unfiltered (gdb_stdlog, "infrun: step through delay\n");
|
if (step_range_end == 0 && step_through_delay)
|
if (step_range_end == 0 && step_through_delay)
|
{
|
{
|
/* The user issued a continue when stopped at a breakpoint.
|
/* The user issued a continue when stopped at a breakpoint.
|
Set up for another trap and get out of here. */
|
Set up for another trap and get out of here. */
|
ecs->stepping_over_breakpoint = 1;
|
ecs->stepping_over_breakpoint = 1;
|
keep_going (ecs);
|
keep_going (ecs);
|
return;
|
return;
|
}
|
}
|
else if (step_through_delay)
|
else if (step_through_delay)
|
{
|
{
|
/* The user issued a step when stopped at a breakpoint.
|
/* The user issued a step when stopped at a breakpoint.
|
Maybe we should stop, maybe we should not - the delay
|
Maybe we should stop, maybe we should not - the delay
|
slot *might* correspond to a line of source. In any
|
slot *might* correspond to a line of source. In any
|
case, don't decide that here, just set
|
case, don't decide that here, just set
|
ecs->stepping_over_breakpoint, making sure we
|
ecs->stepping_over_breakpoint, making sure we
|
single-step again before breakpoints are re-inserted. */
|
single-step again before breakpoints are re-inserted. */
|
ecs->stepping_over_breakpoint = 1;
|
ecs->stepping_over_breakpoint = 1;
|
}
|
}
|
}
|
}
|
|
|
/* 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->stepping_over_breakpoint to 1 to single step once)
|
(set ecs->stepping_over_breakpoint 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. Note that
|
that have to do with the program's own actions. Note that
|
breakpoint insns may cause SIGTRAP or SIGILL or SIGEMT, depending
|
breakpoint insns may cause SIGTRAP or SIGILL or SIGEMT, depending
|
on the operating system version. Here we detect when a SIGILL or
|
on the operating system version. Here we detect when a SIGILL or
|
SIGEMT is really a breakpoint and change it to SIGTRAP. We do
|
SIGEMT is really a breakpoint and change it to SIGTRAP. We do
|
something similar for SIGSEGV, since a SIGSEGV will be generated
|
something similar for SIGSEGV, since a SIGSEGV will be generated
|
when we're trying to execute a breakpoint instruction on a
|
when we're trying to execute a breakpoint instruction on a
|
non-executable stack. This happens for call dummy breakpoints
|
non-executable stack. This happens for call dummy breakpoints
|
for architectures like SPARC that place call dummies on the
|
for architectures like SPARC that place call dummies on the
|
stack. */
|
stack. */
|
|
|
if (stop_signal == TARGET_SIGNAL_TRAP
|
if (stop_signal == TARGET_SIGNAL_TRAP
|
|| (breakpoint_inserted_here_p (stop_pc)
|
|| (breakpoint_inserted_here_p (stop_pc)
|
&& (stop_signal == TARGET_SIGNAL_ILL
|
&& (stop_signal == TARGET_SIGNAL_ILL
|
|| stop_signal == TARGET_SIGNAL_SEGV
|
|| stop_signal == TARGET_SIGNAL_SEGV
|
|| stop_signal == TARGET_SIGNAL_EMT))
|
|| stop_signal == TARGET_SIGNAL_EMT))
|
|| stop_soon == STOP_QUIETLY || stop_soon == STOP_QUIETLY_NO_SIGSTOP
|
|| stop_soon == STOP_QUIETLY || stop_soon == STOP_QUIETLY_NO_SIGSTOP
|
|| stop_soon == STOP_QUIETLY_REMOTE)
|
|| stop_soon == STOP_QUIETLY_REMOTE)
|
{
|
{
|
if (stop_signal == TARGET_SIGNAL_TRAP && stop_after_trap)
|
if (stop_signal == TARGET_SIGNAL_TRAP && stop_after_trap)
|
{
|
{
|
if (debug_infrun)
|
if (debug_infrun)
|
fprintf_unfiltered (gdb_stdlog, "infrun: stopped\n");
|
fprintf_unfiltered (gdb_stdlog, "infrun: stopped\n");
|
stop_print_frame = 0;
|
stop_print_frame = 0;
|
stop_stepping (ecs);
|
stop_stepping (ecs);
|
return;
|
return;
|
}
|
}
|
|
|
/* This is originated from start_remote(), start_inferior() and
|
/* This is originated from start_remote(), start_inferior() and
|
shared libraries hook functions. */
|
shared libraries hook functions. */
|
if (stop_soon == STOP_QUIETLY || stop_soon == STOP_QUIETLY_REMOTE)
|
if (stop_soon == STOP_QUIETLY || stop_soon == STOP_QUIETLY_REMOTE)
|
{
|
{
|
if (debug_infrun)
|
if (debug_infrun)
|
fprintf_unfiltered (gdb_stdlog, "infrun: quietly stopped\n");
|
fprintf_unfiltered (gdb_stdlog, "infrun: quietly stopped\n");
|
stop_stepping (ecs);
|
stop_stepping (ecs);
|
return;
|
return;
|
}
|
}
|
|
|
/* This originates from attach_command(). We need to overwrite
|
/* This originates from attach_command(). We need to overwrite
|
the stop_signal here, because some kernels don't ignore a
|
the stop_signal here, because some kernels don't ignore a
|
SIGSTOP in a subsequent ptrace(PTRACE_SONT,SOGSTOP) call.
|
SIGSTOP in a subsequent ptrace(PTRACE_SONT,SOGSTOP) call.
|
See more comments in inferior.h. */
|
See more comments in inferior.h. */
|
if (stop_soon == STOP_QUIETLY_NO_SIGSTOP)
|
if (stop_soon == STOP_QUIETLY_NO_SIGSTOP)
|
{
|
{
|
stop_stepping (ecs);
|
stop_stepping (ecs);
|
if (stop_signal == TARGET_SIGNAL_STOP)
|
if (stop_signal == TARGET_SIGNAL_STOP)
|
stop_signal = TARGET_SIGNAL_0;
|
stop_signal = TARGET_SIGNAL_0;
|
return;
|
return;
|
}
|
}
|
|
|
/* 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_pc, ecs->ptid);
|
stop_bpstat = bpstat_stop_status (stop_pc, ecs->ptid);
|
|
|
/* Following in case break condition called a
|
/* Following in case break condition called a
|
function. */
|
function. */
|
stop_print_frame = 1;
|
stop_print_frame = 1;
|
|
|
/* NOTE: cagney/2003-03-29: These two checks for a random signal
|
/* NOTE: cagney/2003-03-29: These two checks for a random signal
|
at one stage in the past included checks for an inferior
|
at one stage in the past included checks for an inferior
|
function call's call dummy's return breakpoint. The original
|
function call's call dummy's return breakpoint. The original
|
comment, that went with the test, read:
|
comment, that went with the test, read:
|
|
|
``End of a stack dummy. Some systems (e.g. Sony news) give
|
``End of a stack dummy. Some systems (e.g. Sony news) give
|
another signal besides SIGTRAP, so check here as well as
|
another signal besides SIGTRAP, so check here as well as
|
above.''
|
above.''
|
|
|
If someone ever tries to get get call dummys on a
|
If someone ever tries to get get call dummys on a
|
non-executable stack to work (where the target would stop
|
non-executable stack to work (where the target would stop
|
with something like a SIGSEGV), then those tests might need
|
with something like a SIGSEGV), then those tests might need
|
to be re-instated. Given, however, that the tests were only
|
to be re-instated. Given, however, that the tests were only
|
enabled when momentary breakpoints were not being used, I
|
enabled when momentary breakpoints were not being used, I
|
suspect that it won't be the case.
|
suspect that it won't be the case.
|
|
|
NOTE: kettenis/2004-02-05: Indeed such checks don't seem to
|
NOTE: kettenis/2004-02-05: Indeed such checks don't seem to
|
be necessary for call dummies on a non-executable stack on
|
be necessary for call dummies on a non-executable stack on
|
SPARC. */
|
SPARC. */
|
|
|
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)
|
|| stepping_over_breakpoint
|
|| stepping_over_breakpoint
|
|| (step_range_end && step_resume_breakpoint == NULL));
|
|| (step_range_end && step_resume_breakpoint == NULL));
|
else
|
else
|
{
|
{
|
ecs->random_signal = !bpstat_explains_signal (stop_bpstat);
|
ecs->random_signal = !bpstat_explains_signal (stop_bpstat);
|
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;
|
|
|
process_event_stop_test:
|
process_event_stop_test:
|
/* 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;
|
|
|
if (debug_infrun)
|
if (debug_infrun)
|
fprintf_unfiltered (gdb_stdlog, "infrun: random signal %d\n", stop_signal);
|
fprintf_unfiltered (gdb_stdlog, "infrun: random signal %d\n", stop_signal);
|
|
|
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;
|
|
|
if (prev_pc == read_pc ()
|
if (prev_pc == read_pc ()
|
&& breakpoint_here_p (read_pc ())
|
&& breakpoint_here_p (read_pc ())
|
&& !breakpoint_inserted_here_p (read_pc ())
|
&& !breakpoint_inserted_here_p (read_pc ())
|
&& step_resume_breakpoint == NULL)
|
&& step_resume_breakpoint == NULL)
|
{
|
{
|
/* We were just starting a new sequence, attempting to
|
/* We were just starting a new sequence, attempting to
|
single-step off of a breakpoint and expecting a SIGTRAP.
|
single-step off of a breakpoint and expecting a SIGTRAP.
|
Intead this signal arrives. This signal will take us out
|
Intead this signal arrives. This signal will take us out
|
of the stepping range so GDB needs to remember to, when
|
of the stepping range so GDB needs to remember to, when
|
the signal handler returns, resume stepping off that
|
the signal handler returns, resume stepping off that
|
breakpoint. */
|
breakpoint. */
|
/* To simplify things, "continue" is forced to use the same
|
/* To simplify things, "continue" is forced to use the same
|
code paths as single-step - set a breakpoint at the
|
code paths as single-step - set a breakpoint at the
|
signal return address and then, once hit, step off that
|
signal return address and then, once hit, step off that
|
breakpoint. */
|
breakpoint. */
|
|
|
insert_step_resume_breakpoint_at_frame (get_current_frame ());
|
insert_step_resume_breakpoint_at_frame (get_current_frame ());
|
ecs->step_after_step_resume_breakpoint = 1;
|
ecs->step_after_step_resume_breakpoint = 1;
|
keep_going (ecs);
|
keep_going (ecs);
|
return;
|
return;
|
}
|
}
|
|
|
if (step_range_end != 0
|
if (step_range_end != 0
|
&& stop_signal != TARGET_SIGNAL_0
|
&& stop_signal != TARGET_SIGNAL_0
|
&& stop_pc >= step_range_start && stop_pc < step_range_end
|
&& stop_pc >= step_range_start && stop_pc < step_range_end
|
&& frame_id_eq (get_frame_id (get_current_frame ()),
|
&& frame_id_eq (get_frame_id (get_current_frame ()),
|
step_frame_id)
|
step_frame_id)
|
&& step_resume_breakpoint == NULL)
|
&& step_resume_breakpoint == NULL)
|
{
|
{
|
/* The inferior is about to take a signal that will take it
|
/* The inferior is about to take a signal that will take it
|
out of the single step range. Set a breakpoint at the
|
out of the single step range. Set a breakpoint at the
|
current PC (which is presumably where the signal handler
|
current PC (which is presumably where the signal handler
|
will eventually return) and then allow the inferior to
|
will eventually return) and then allow the inferior to
|
run free.
|
run free.
|
|
|
Note that this is only needed for a signal delivered
|
Note that this is only needed for a signal delivered
|
while in the single-step range. Nested signals aren't a
|
while in the single-step range. Nested signals aren't a
|
problem as they eventually all return. */
|
problem as they eventually all return. */
|
insert_step_resume_breakpoint_at_frame (get_current_frame ());
|
insert_step_resume_breakpoint_at_frame (get_current_frame ());
|
keep_going (ecs);
|
keep_going (ecs);
|
return;
|
return;
|
}
|
}
|
|
|
/* Note: step_resume_breakpoint may be non-NULL. This occures
|
/* Note: step_resume_breakpoint may be non-NULL. This occures
|
when either there's a nested signal, or when there's a
|
when either there's a nested signal, or when there's a
|
pending signal enabled just as the signal handler returns
|
pending signal enabled just as the signal handler returns
|
(leaving the inferior at the step-resume-breakpoint without
|
(leaving the inferior at the step-resume-breakpoint without
|
actually executing it). Either way continue until the
|
actually executing it). Either way continue until the
|
breakpoint is really hit. */
|
breakpoint is really hit. */
|
keep_going (ecs);
|
keep_going (ecs);
|
return;
|
return;
|
}
|
}
|
|
|
/* 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;
|
}
|
}
|
|
|
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. */
|
if (debug_infrun)
|
if (debug_infrun)
|
fprintf_unfiltered (gdb_stdlog, "infrun: BPSTAT_WHAT_SET_LONGJMP_RESUME\n");
|
fprintf_unfiltered (gdb_stdlog, "infrun: BPSTAT_WHAT_SET_LONGJMP_RESUME\n");
|
disable_longjmp_breakpoint ();
|
disable_longjmp_breakpoint ();
|
if (!gdbarch_get_longjmp_target_p (current_gdbarch)
|
if (!gdbarch_get_longjmp_target_p (current_gdbarch)
|
|| !gdbarch_get_longjmp_target (current_gdbarch,
|
|| !gdbarch_get_longjmp_target (current_gdbarch,
|
get_current_frame (), &jmp_buf_pc))
|
get_current_frame (), &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_step_resume_breakpoint (&step_resume_breakpoint);
|
delete_step_resume_breakpoint (&step_resume_breakpoint);
|
}
|
}
|
|
|
set_longjmp_resume_breakpoint (jmp_buf_pc, null_frame_id);
|
set_longjmp_resume_breakpoint (jmp_buf_pc, null_frame_id);
|
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:
|
if (debug_infrun)
|
if (debug_infrun)
|
fprintf_unfiltered (gdb_stdlog, "infrun: BPSTAT_WHAT_CLEAR_LONGJMP_RESUME\n");
|
fprintf_unfiltered (gdb_stdlog, "infrun: BPSTAT_WHAT_CLEAR_LONGJMP_RESUME\n");
|
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 (debug_infrun)
|
if (debug_infrun)
|
fprintf_unfiltered (gdb_stdlog, "infrun: BPSTAT_WHAT_SINGLE\n");
|
fprintf_unfiltered (gdb_stdlog, "infrun: BPSTAT_WHAT_SINGLE\n");
|
ecs->stepping_over_breakpoint = 1;
|
ecs->stepping_over_breakpoint = 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:
|
if (debug_infrun)
|
if (debug_infrun)
|
fprintf_unfiltered (gdb_stdlog, "infrun: BPSTAT_WHAT_STOP_NOISY\n");
|
fprintf_unfiltered (gdb_stdlog, "infrun: BPSTAT_WHAT_STOP_NOISY\n");
|
stop_print_frame = 1;
|
stop_print_frame = 1;
|
|
|
/* We are about to nuke the step_resume_breakpointt via the
|
/* We are about to nuke the step_resume_breakpointt via the
|
cleanup chain, so no need to worry about it here. */
|
cleanup chain, so 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:
|
if (debug_infrun)
|
if (debug_infrun)
|
fprintf_unfiltered (gdb_stdlog, "infrun: BPSTAT_WHAT_STOP_SILENT\n");
|
fprintf_unfiltered (gdb_stdlog, "infrun: BPSTAT_WHAT_STOP_SILENT\n");
|
stop_print_frame = 0;
|
stop_print_frame = 0;
|
|
|
/* We are about to nuke the step_resume_breakpoin via the
|
/* We are about to nuke the step_resume_breakpoin via the
|
cleanup chain, so no need to worry about it here. */
|
cleanup chain, so 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 (debug_infrun)
|
if (debug_infrun)
|
fprintf_unfiltered (gdb_stdlog, "infrun: BPSTAT_WHAT_STEP_RESUME\n");
|
fprintf_unfiltered (gdb_stdlog, "infrun: BPSTAT_WHAT_STEP_RESUME\n");
|
|
|
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_step_resume_breakpoint (&step_resume_breakpoint);
|
delete_step_resume_breakpoint (&step_resume_breakpoint);
|
if (ecs->step_after_step_resume_breakpoint)
|
if (ecs->step_after_step_resume_breakpoint)
|
{
|
{
|
/* Back when the step-resume breakpoint was inserted, we
|
/* Back when the step-resume breakpoint was inserted, we
|
were trying to single-step off a breakpoint. Go back
|
were trying to single-step off a breakpoint. Go back
|
to doing that. */
|
to doing that. */
|
ecs->step_after_step_resume_breakpoint = 0;
|
ecs->step_after_step_resume_breakpoint = 0;
|
ecs->stepping_over_breakpoint = 1;
|
ecs->stepping_over_breakpoint = 1;
|
keep_going (ecs);
|
keep_going (ecs);
|
return;
|
return;
|
}
|
}
|
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:
|
{
|
{
|
if (debug_infrun)
|
if (debug_infrun)
|
fprintf_unfiltered (gdb_stdlog, "infrun: BPSTAT_WHAT_CHECK_SHLIBS\n");
|
fprintf_unfiltered (gdb_stdlog, "infrun: BPSTAT_WHAT_CHECK_SHLIBS\n");
|
/* 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. */
|
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. Switch
|
supposed to be adding them automatically. Switch
|
terminal for any messages produced by
|
terminal for any messages produced by
|
breakpoint_re_set. */
|
breakpoint_re_set. */
|
target_terminal_ours_for_output ();
|
target_terminal_ours_for_output ();
|
/* NOTE: cagney/2003-11-25: Make certain that the target
|
/* NOTE: cagney/2003-11-25: Make certain that the target
|
stack's section table is kept up-to-date. Architectures,
|
stack's section table is kept up-to-date. Architectures,
|
(e.g., PPC64), use the section table to perform
|
(e.g., PPC64), use the section table to perform
|
operations such as address => section name and hence
|
operations such as address => section name and hence
|
require the table to contain all sections (including
|
require the table to contain all sections (including
|
those found in shared libraries). */
|
those found in shared libraries). */
|
/* NOTE: cagney/2003-11-25: Pass current_target and not
|
/* NOTE: cagney/2003-11-25: Pass current_target and not
|
exec_ops to SOLIB_ADD. This is because current GDB is
|
exec_ops to SOLIB_ADD. This is because current GDB is
|
only tooled to propagate section_table changes out from
|
only tooled to propagate section_table changes out from
|
the "current_target" (see target_resize_to_sections), and
|
the "current_target" (see target_resize_to_sections), and
|
not up from the exec stratum. This, of course, isn't
|
not up from the exec stratum. This, of course, isn't
|
right. "infrun.c" should only interact with the
|
right. "infrun.c" should only interact with the
|
exec/process stratum, instead relying on the target stack
|
exec/process stratum, instead relying on the target stack
|
to propagate relevant changes (stop, section table
|
to propagate relevant changes (stop, section table
|
changed, ...) up to other layers. */
|
changed, ...) up to other layers. */
|
#ifdef SOLIB_ADD
|
#ifdef SOLIB_ADD
|
SOLIB_ADD (NULL, 0, ¤t_target, auto_solib_add);
|
SOLIB_ADD (NULL, 0, ¤t_target, auto_solib_add);
|
#else
|
#else
|
solib_add (NULL, 0, ¤t_target, auto_solib_add);
|
solib_add (NULL, 0, ¤t_target, auto_solib_add);
|
#endif
|
#endif
|
target_terminal_inferior ();
|
target_terminal_inferior ();
|
|
|
/* 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 || stop_stack_dummy)
|
if (stop_on_solib_events || stop_stack_dummy)
|
{
|
{
|
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
|
else if (what.main_action
|
== BPSTAT_WHAT_CHECK_SHLIBS_RESUME_FROM_HOOK)
|
== 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->
|
&ecs->
|
stepping_through_solib_catchpoints);
|
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->stepping_over_breakpoint = 1;
|
ecs->stepping_over_breakpoint = 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->stepping_over_breakpoint = 1;
|
ecs->stepping_over_breakpoint = 1;
|
break;
|
break;
|
}
|
}
|
}
|
}
|
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 linker's
|
/* Are we stepping to get the inferior out of the dynamic linker's
|
hook (and possibly the dld itself) after catching a shlib
|
hook (and possibly the dld itself) after catching a shlib
|
event? */
|
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 (PIDGET (ecs->ptid), stop_pc))
|
if (SOLIB_IN_DYNAMIC_LINKER (PIDGET (ecs->ptid), stop_pc))
|
{
|
{
|
if (debug_infrun)
|
if (debug_infrun)
|
fprintf_unfiltered (gdb_stdlog, "infrun: stepping in dynamic linker\n");
|
fprintf_unfiltered (gdb_stdlog, "infrun: stepping in dynamic linker\n");
|
ecs->stepping_over_breakpoint = 1;
|
ecs->stepping_over_breakpoint = 1;
|
keep_going (ecs);
|
keep_going (ecs);
|
return;
|
return;
|
}
|
}
|
#endif
|
#endif
|
if (debug_infrun)
|
if (debug_infrun)
|
fprintf_unfiltered (gdb_stdlog, "infrun: step past dynamic linker\n");
|
fprintf_unfiltered (gdb_stdlog, "infrun: step past dynamic linker\n");
|
/* 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 (step_resume_breakpoint)
|
if (step_resume_breakpoint)
|
{
|
{
|
if (debug_infrun)
|
if (debug_infrun)
|
fprintf_unfiltered (gdb_stdlog,
|
fprintf_unfiltered (gdb_stdlog,
|
"infrun: step-resume breakpoint is inserted\n");
|
"infrun: step-resume breakpoint is inserted\n");
|
|
|
/* 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. */
|
keep_going (ecs);
|
keep_going (ecs);
|
return;
|
return;
|
}
|
}
|
|
|
if (step_range_end == 0)
|
if (step_range_end == 0)
|
{
|
{
|
if (debug_infrun)
|
if (debug_infrun)
|
fprintf_unfiltered (gdb_stdlog, "infrun: no stepping, continue\n");
|
fprintf_unfiltered (gdb_stdlog, "infrun: no stepping, continue\n");
|
/* Likewise if we aren't even stepping. */
|
/* Likewise if we aren't even stepping. */
|
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 && stop_pc < step_range_end)
|
if (stop_pc >= step_range_start && stop_pc < step_range_end)
|
{
|
{
|
if (debug_infrun)
|
if (debug_infrun)
|
fprintf_unfiltered (gdb_stdlog, "infrun: stepping inside range [0x%s-0x%s]\n",
|
fprintf_unfiltered (gdb_stdlog, "infrun: stepping inside range [0x%s-0x%s]\n",
|
paddr_nz (step_range_start),
|
paddr_nz (step_range_start),
|
paddr_nz (step_range_end));
|
paddr_nz (step_range_end));
|
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 == STEP_OVER_UNDEBUGGABLE
|
if (step_over_calls == STEP_OVER_UNDEBUGGABLE
|
#ifdef IN_SOLIB_DYNSYM_RESOLVE_CODE
|
#ifdef IN_SOLIB_DYNSYM_RESOLVE_CODE
|
&& IN_SOLIB_DYNSYM_RESOLVE_CODE (stop_pc)
|
&& IN_SOLIB_DYNSYM_RESOLVE_CODE (stop_pc)
|
#else
|
#else
|
&& in_solib_dynsym_resolve_code (stop_pc)
|
&& in_solib_dynsym_resolve_code (stop_pc)
|
#endif
|
#endif
|
)
|
)
|
{
|
{
|
CORE_ADDR pc_after_resolver =
|
CORE_ADDR pc_after_resolver =
|
gdbarch_skip_solib_resolver (current_gdbarch, stop_pc);
|
gdbarch_skip_solib_resolver (current_gdbarch, stop_pc);
|
|
|
if (debug_infrun)
|
if (debug_infrun)
|
fprintf_unfiltered (gdb_stdlog, "infrun: stepped into dynsym resolve code\n");
|
fprintf_unfiltered (gdb_stdlog, "infrun: stepped into dynsym resolve code\n");
|
|
|
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;
|
|
|
insert_step_resume_breakpoint_at_sal (sr_sal, null_frame_id);
|
insert_step_resume_breakpoint_at_sal (sr_sal, null_frame_id);
|
}
|
}
|
|
|
keep_going (ecs);
|
keep_going (ecs);
|
return;
|
return;
|
}
|
}
|
|
|
if (step_range_end != 1
|
if (step_range_end != 1
|
&& (step_over_calls == STEP_OVER_UNDEBUGGABLE
|
&& (step_over_calls == STEP_OVER_UNDEBUGGABLE
|
|| step_over_calls == STEP_OVER_ALL)
|
|| step_over_calls == STEP_OVER_ALL)
|
&& get_frame_type (get_current_frame ()) == SIGTRAMP_FRAME)
|
&& get_frame_type (get_current_frame ()) == SIGTRAMP_FRAME)
|
{
|
{
|
if (debug_infrun)
|
if (debug_infrun)
|
fprintf_unfiltered (gdb_stdlog, "infrun: stepped into signal trampoline\n");
|
fprintf_unfiltered (gdb_stdlog, "infrun: stepped into signal trampoline\n");
|
/* The inferior, while doing a "step" or "next", has ended up in
|
/* The inferior, while doing a "step" or "next", has ended up in
|
a signal trampoline (either by a signal being delivered or by
|
a signal trampoline (either by a signal being delivered or by
|
the signal handler returning). Just single-step until the
|
the signal handler returning). Just single-step until the
|
inferior leaves the trampoline (either by calling the handler
|
inferior leaves the trampoline (either by calling the handler
|
or returning). */
|
or returning). */
|
keep_going (ecs);
|
keep_going (ecs);
|
return;
|
return;
|
}
|
}
|
|
|
/* Check for subroutine calls. The check for the current frame
|
/* Check for subroutine calls. The check for the current frame
|
equalling the step ID is not necessary - the check of the
|
equalling the step ID is not necessary - the check of the
|
previous frame's ID is sufficient - but it is a common case and
|
previous frame's ID is sufficient - but it is a common case and
|
cheaper than checking the previous frame's ID.
|
cheaper than checking the previous frame's ID.
|
|
|
NOTE: frame_id_eq will never report two invalid frame IDs as
|
NOTE: frame_id_eq will never report two invalid frame IDs as
|
being equal, so to get into this block, both the current and
|
being equal, so to get into this block, both the current and
|
previous frame must have valid frame IDs. */
|
previous frame must have valid frame IDs. */
|
if (!frame_id_eq (get_frame_id (get_current_frame ()), step_frame_id)
|
if (!frame_id_eq (get_frame_id (get_current_frame ()), step_frame_id)
|
&& frame_id_eq (frame_unwind_id (get_current_frame ()), step_frame_id))
|
&& frame_id_eq (frame_unwind_id (get_current_frame ()), step_frame_id))
|
{
|
{
|
CORE_ADDR real_stop_pc;
|
CORE_ADDR real_stop_pc;
|
|
|
if (debug_infrun)
|
if (debug_infrun)
|
fprintf_unfiltered (gdb_stdlog, "infrun: stepped into subroutine\n");
|
fprintf_unfiltered (gdb_stdlog, "infrun: stepped into subroutine\n");
|
|
|
if ((step_over_calls == STEP_OVER_NONE)
|
if ((step_over_calls == STEP_OVER_NONE)
|
|| ((step_range_end == 1)
|
|| ((step_range_end == 1)
|
&& in_prologue (prev_pc, ecs->stop_func_start)))
|
&& in_prologue (prev_pc, ecs->stop_func_start)))
|
{
|
{
|
/* 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. */
|
/* Also, maybe we just did a "nexti" inside a prolog, so we
|
/* Also, maybe we just did a "nexti" inside a prolog, so we
|
thought it was a subroutine call but it was not. Stop as
|
thought it was a subroutine call but it was not. Stop as
|
well. FENN */
|
well. FENN */
|
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 == STEP_OVER_ALL)
|
if (step_over_calls == STEP_OVER_ALL)
|
{
|
{
|
/* We're doing a "next", set a breakpoint at callee's return
|
/* We're doing a "next", set a breakpoint at callee's return
|
address (the address at which the caller will
|
address (the address at which the caller will
|
resume). */
|
resume). */
|
insert_step_resume_breakpoint_at_caller (get_current_frame ());
|
insert_step_resume_breakpoint_at_caller (get_current_frame ());
|
keep_going (ecs);
|
keep_going (ecs);
|
return;
|
return;
|
}
|
}
|
|
|
/* If we are in a function call trampoline (a stub between the
|
/* If we are in a function call trampoline (a stub between the
|
calling routine and the real function), locate the real
|
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 the
|
into it at all, and (b) what prologue we want to run to the
|
end of, if we do step into it. */
|
end of, if we do step into it. */
|
real_stop_pc = skip_language_trampoline (get_current_frame (), stop_pc);
|
real_stop_pc = skip_language_trampoline (get_current_frame (), stop_pc);
|
if (real_stop_pc == 0)
|
if (real_stop_pc == 0)
|
real_stop_pc = gdbarch_skip_trampoline_code
|
real_stop_pc = gdbarch_skip_trampoline_code
|
(current_gdbarch, get_current_frame (), stop_pc);
|
(current_gdbarch, get_current_frame (), stop_pc);
|
if (real_stop_pc != 0)
|
if (real_stop_pc != 0)
|
ecs->stop_func_start = real_stop_pc;
|
ecs->stop_func_start = real_stop_pc;
|
|
|
if (
|
if (
|
#ifdef IN_SOLIB_DYNSYM_RESOLVE_CODE
|
#ifdef IN_SOLIB_DYNSYM_RESOLVE_CODE
|
IN_SOLIB_DYNSYM_RESOLVE_CODE (ecs->stop_func_start)
|
IN_SOLIB_DYNSYM_RESOLVE_CODE (ecs->stop_func_start)
|
#else
|
#else
|
in_solib_dynsym_resolve_code (ecs->stop_func_start)
|
in_solib_dynsym_resolve_code (ecs->stop_func_start)
|
#endif
|
#endif
|
)
|
)
|
{
|
{
|
struct symtab_and_line sr_sal;
|
struct symtab_and_line sr_sal;
|
init_sal (&sr_sal);
|
init_sal (&sr_sal);
|
sr_sal.pc = ecs->stop_func_start;
|
sr_sal.pc = ecs->stop_func_start;
|
|
|
insert_step_resume_breakpoint_at_sal (sr_sal, null_frame_id);
|
insert_step_resume_breakpoint_at_sal (sr_sal, null_frame_id);
|
keep_going (ecs);
|
keep_going (ecs);
|
return;
|
return;
|
}
|
}
|
|
|
/* If we have line number information for the function we are
|
/* If we have line number information for the function we are
|
thinking of stepping into, step into it.
|
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;
|
}
|
}
|
}
|
}
|
|
|
/* If we have no line number and the step-stop-if-no-debug is
|
/* If we have no line number and the step-stop-if-no-debug is
|
set, we stop the step so that the user has a chance to switch
|
set, we stop the step so that the user has a chance to switch
|
in assembly mode. */
|
in assembly mode. */
|
if (step_over_calls == STEP_OVER_UNDEBUGGABLE && step_stop_if_no_debug)
|
if (step_over_calls == STEP_OVER_UNDEBUGGABLE && step_stop_if_no_debug)
|
{
|
{
|
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;
|
}
|
}
|
|
|
/* Set a breakpoint at callee's return address (the address at
|
/* Set a breakpoint at callee's return address (the address at
|
which the caller will resume). */
|
which the caller will resume). */
|
insert_step_resume_breakpoint_at_caller (get_current_frame ());
|
insert_step_resume_breakpoint_at_caller (get_current_frame ());
|
keep_going (ecs);
|
keep_going (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 (gdbarch_in_solib_return_trampoline (current_gdbarch,
|
if (gdbarch_in_solib_return_trampoline (current_gdbarch,
|
stop_pc, ecs->stop_func_name))
|
stop_pc, ecs->stop_func_name))
|
{
|
{
|
/* Determine where this trampoline returns. */
|
/* Determine where this trampoline returns. */
|
CORE_ADDR real_stop_pc;
|
CORE_ADDR real_stop_pc;
|
real_stop_pc = gdbarch_skip_trampoline_code
|
real_stop_pc = gdbarch_skip_trampoline_code
|
(current_gdbarch, get_current_frame (), stop_pc);
|
(current_gdbarch, get_current_frame (), stop_pc);
|
|
|
if (debug_infrun)
|
if (debug_infrun)
|
fprintf_unfiltered (gdb_stdlog, "infrun: stepped into solib return tramp\n");
|
fprintf_unfiltered (gdb_stdlog, "infrun: stepped into solib return tramp\n");
|
|
|
/* Only proceed through if we know where it's going. */
|
/* Only proceed through if we know where it's going. */
|
if (real_stop_pc)
|
if (real_stop_pc)
|
{
|
{
|
/* 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 = real_stop_pc;
|
sr_sal.pc = real_stop_pc;
|
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 since
|
/* Do not specify what the fp should be when we stop since
|
on some machines the prologue is where the new fp value
|
on some machines the prologue is where the new fp value
|
is established. */
|
is established. */
|
insert_step_resume_breakpoint_at_sal (sr_sal, null_frame_id);
|
insert_step_resume_breakpoint_at_sal (sr_sal, null_frame_id);
|
|
|
/* 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;
|
}
|
}
|
}
|
}
|
|
|
ecs->sal = find_pc_line (stop_pc, 0);
|
ecs->sal = find_pc_line (stop_pc, 0);
|
|
|
/* NOTE: tausq/2004-05-24: This if block used to be done before all
|
/* NOTE: tausq/2004-05-24: This if block used to be done before all
|
the trampoline processing logic, however, there are some trampolines
|
the trampoline processing logic, however, there are some trampolines
|
that have no names, so we should do trampoline handling first. */
|
that have no names, so we should do trampoline handling first. */
|
if (step_over_calls == STEP_OVER_UNDEBUGGABLE
|
if (step_over_calls == STEP_OVER_UNDEBUGGABLE
|
&& ecs->stop_func_name == NULL
|
&& ecs->stop_func_name == NULL
|
&& ecs->sal.line == 0)
|
&& ecs->sal.line == 0)
|
{
|
{
|
if (debug_infrun)
|
if (debug_infrun)
|
fprintf_unfiltered (gdb_stdlog, "infrun: stepped into undebuggable function\n");
|
fprintf_unfiltered (gdb_stdlog, "infrun: stepped into undebuggable function\n");
|
|
|
/* The inferior just stepped into, or returned to, an
|
/* The inferior just stepped into, or returned to, an
|
undebuggable function (where there is no debugging information
|
undebuggable function (where there is no debugging information
|
and no line number corresponding to the address where the
|
and no line number corresponding to the address where the
|
inferior stopped). Since we want to skip this kind of code,
|
inferior stopped). Since we want to skip this kind of code,
|
we keep going until the inferior returns from this
|
we keep going until the inferior returns from this
|
function - unless the user has asked us not to (via
|
function - unless the user has asked us not to (via
|
set step-mode) or we no longer know how to get back
|
set step-mode) or we no longer know how to get back
|
to the call site. */
|
to the call site. */
|
if (step_stop_if_no_debug
|
if (step_stop_if_no_debug
|
|| !frame_id_p (frame_unwind_id (get_current_frame ())))
|
|| !frame_id_p (frame_unwind_id (get_current_frame ())))
|
{
|
{
|
/* If we have no line number and the step-stop-if-no-debug
|
/* If we have no line number and the step-stop-if-no-debug
|
is set, we stop the step so that the user has a chance to
|
is set, we stop the step so that the user has a chance to
|
switch in assembly mode. */
|
switch in assembly mode. */
|
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
|
{
|
{
|
/* Set a breakpoint at callee's return address (the address
|
/* Set a breakpoint at callee's return address (the address
|
at which the caller will resume). */
|
at which the caller will resume). */
|
insert_step_resume_breakpoint_at_caller (get_current_frame ());
|
insert_step_resume_breakpoint_at_caller (get_current_frame ());
|
keep_going (ecs);
|
keep_going (ecs);
|
return;
|
return;
|
}
|
}
|
}
|
}
|
|
|
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. */
|
if (debug_infrun)
|
if (debug_infrun)
|
fprintf_unfiltered (gdb_stdlog, "infrun: stepi/nexti\n");
|
fprintf_unfiltered (gdb_stdlog, "infrun: stepi/nexti\n");
|
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 (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?). */
|
if (debug_infrun)
|
if (debug_infrun)
|
fprintf_unfiltered (gdb_stdlog, "infrun: no line number info\n");
|
fprintf_unfiltered (gdb_stdlog, "infrun: no line number info\n");
|
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_line != ecs->sal.line
|
|| ecs->current_symtab != ecs->sal.symtab))
|
|| 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. */
|
if (debug_infrun)
|
if (debug_infrun)
|
fprintf_unfiltered (gdb_stdlog, "infrun: stepped to a different line\n");
|
fprintf_unfiltered (gdb_stdlog, "infrun: stepped to a different line\n");
|
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.) */
|
|
|
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_id = get_frame_id (get_current_frame ());
|
step_frame_id = get_frame_id (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
|
/* In the case where we just stepped out of a function into the
|
middle of a line of the caller, continue stepping, but
|
middle of a line of the caller, continue stepping, but
|
step_frame_id must be modified to current frame */
|
step_frame_id must be modified to current frame */
|
#if 0
|
#if 0
|
/* NOTE: cagney/2003-10-16: I think this frame ID inner test is too
|
/* NOTE: cagney/2003-10-16: I think this frame ID inner test is too
|
generous. It will trigger on things like a step into a frameless
|
generous. It will trigger on things like a step into a frameless
|
stackless leaf function. I think the logic should instead look
|
stackless leaf function. I think the logic should instead look
|
at the unwound frame ID has that should give a more robust
|
at the unwound frame ID has that should give a more robust
|
indication of what happened. */
|
indication of what happened. */
|
if (step - ID == current - ID)
|
if (step - ID == current - ID)
|
still stepping in same function;
|
still stepping in same function;
|
else if (step - ID == unwind (current - ID))
|
else if (step - ID == unwind (current - ID))
|
stepped into a function;
|
stepped into a function;
|
else
|
else
|
stepped out of a function;
|
stepped out of a function;
|
/* Of course this assumes that the frame ID unwind code is robust
|
/* Of course this assumes that the frame ID unwind code is robust
|
and we're willing to introduce frame unwind logic into this
|
and we're willing to introduce frame unwind logic into this
|
function. Fortunately, those days are nearly upon us. */
|
function. Fortunately, those days are nearly upon us. */
|
#endif
|
#endif
|
{
|
{
|
struct frame_info *frame = get_current_frame ();
|
struct frame_info *frame = get_current_frame ();
|
struct frame_id current_frame = get_frame_id (frame);
|
struct frame_id current_frame = get_frame_id (frame);
|
if (!(frame_id_inner (get_frame_arch (frame), current_frame,
|
if (!(frame_id_inner (get_frame_arch (frame), current_frame,
|
step_frame_id)))
|
step_frame_id)))
|
step_frame_id = current_frame;
|
step_frame_id = current_frame;
|
}
|
}
|
|
|
if (debug_infrun)
|
if (debug_infrun)
|
fprintf_unfiltered (gdb_stdlog, "infrun: keep going\n");
|
fprintf_unfiltered (gdb_stdlog, "infrun: keep going\n");
|
keep_going (ecs);
|
keep_going (ecs);
|
}
|
}
|
|
|
/* 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 ((!ecs->handling_longjmp
|
return ((!ecs->handling_longjmp
|
&& ((step_range_end && step_resume_breakpoint == NULL)
|
&& ((step_range_end && step_resume_breakpoint == NULL)
|
|| stepping_over_breakpoint))
|
|| stepping_over_breakpoint))
|
|| ecs->stepping_through_solib_after_catch
|
|| ecs->stepping_through_solib_after_catch
|
|| bpstat_should_step ());
|
|| bpstat_should_step ());
|
}
|
}
|
|
|
/* 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 = gdbarch_skip_prologue
|
ecs->stop_func_start = gdbarch_skip_prologue
|
(current_gdbarch, ecs->stop_func_start);
|
(current_gdbarch, 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. */
|
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;
|
|
|
/* Architectures which require breakpoint adjustment might not be able
|
/* Architectures which require breakpoint adjustment might not be able
|
to place a breakpoint at the computed address. If so, the test
|
to place a breakpoint at the computed address. If so, the test
|
``ecs->stop_func_start == stop_pc'' will never succeed. Adjust
|
``ecs->stop_func_start == stop_pc'' will never succeed. Adjust
|
ecs->stop_func_start to an address at which a breakpoint may be
|
ecs->stop_func_start to an address at which a breakpoint may be
|
legitimately placed.
|
legitimately placed.
|
|
|
Note: kevinb/2004-01-19: On FR-V, if this adjustment is not
|
Note: kevinb/2004-01-19: On FR-V, if this adjustment is not
|
made, GDB will enter an infinite loop when stepping through
|
made, GDB will enter an infinite loop when stepping through
|
optimized code consisting of VLIW instructions which contain
|
optimized code consisting of VLIW instructions which contain
|
subinstructions corresponding to different source lines. On
|
subinstructions corresponding to different source lines. On
|
FR-V, it's not permitted to place a breakpoint on any but the
|
FR-V, it's not permitted to place a breakpoint on any but the
|
first subinstruction of a VLIW instruction. When a breakpoint is
|
first subinstruction of a VLIW instruction. When a breakpoint is
|
set, GDB will adjust the breakpoint address to the beginning of
|
set, GDB will adjust the breakpoint address to the beginning of
|
the VLIW instruction. Thus, we need to make the corresponding
|
the VLIW instruction. Thus, we need to make the corresponding
|
adjustment here when computing the stop address. */
|
adjustment here when computing the stop address. */
|
|
|
if (gdbarch_adjust_breakpoint_address_p (current_gdbarch))
|
if (gdbarch_adjust_breakpoint_address_p (current_gdbarch))
|
{
|
{
|
ecs->stop_func_start
|
ecs->stop_func_start
|
= gdbarch_adjust_breakpoint_address (current_gdbarch,
|
= gdbarch_adjust_breakpoint_address (current_gdbarch,
|
ecs->stop_func_start);
|
ecs->stop_func_start);
|
}
|
}
|
|
|
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. */
|
insert_step_resume_breakpoint_at_sal (sr_sal, null_frame_id);
|
insert_step_resume_breakpoint_at_sal (sr_sal, null_frame_id);
|
|
|
/* 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);
|
}
|
}
|
|
|
/* Insert a "step-resume breakpoint" at SR_SAL with frame ID SR_ID.
|
/* Insert a "step-resume breakpoint" at SR_SAL with frame ID SR_ID.
|
This is used to both functions and to skip over code. */
|
This is used to both functions and to skip over code. */
|
|
|
static void
|
static void
|
insert_step_resume_breakpoint_at_sal (struct symtab_and_line sr_sal,
|
insert_step_resume_breakpoint_at_sal (struct symtab_and_line sr_sal,
|
struct frame_id sr_id)
|
struct frame_id sr_id)
|
{
|
{
|
/* There should never be more than one step-resume breakpoint per
|
/* There should never be more than one step-resume breakpoint per
|
thread, so we should never be setting a new
|
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. */
|
gdb_assert (step_resume_breakpoint == NULL);
|
gdb_assert (step_resume_breakpoint == NULL);
|
|
|
if (debug_infrun)
|
if (debug_infrun)
|
fprintf_unfiltered (gdb_stdlog,
|
fprintf_unfiltered (gdb_stdlog,
|
"infrun: inserting step-resume breakpoint at 0x%s\n",
|
"infrun: inserting step-resume breakpoint at 0x%s\n",
|
paddr_nz (sr_sal.pc));
|
paddr_nz (sr_sal.pc));
|
|
|
step_resume_breakpoint = set_momentary_breakpoint (sr_sal, sr_id,
|
step_resume_breakpoint = set_momentary_breakpoint (sr_sal, sr_id,
|
bp_step_resume);
|
bp_step_resume);
|
}
|
}
|
|
|
/* Insert a "step-resume breakpoint" at RETURN_FRAME.pc. This is used
|
/* Insert a "step-resume breakpoint" at RETURN_FRAME.pc. This is used
|
to skip a potential signal handler.
|
to skip a potential signal handler.
|
|
|
This is called with the interrupted function's frame. The signal
|
This is called with the interrupted function's frame. The signal
|
handler, when it returns, will resume the interrupted function at
|
handler, when it returns, will resume the interrupted function at
|
RETURN_FRAME.pc. */
|
RETURN_FRAME.pc. */
|
|
|
static void
|
static void
|
insert_step_resume_breakpoint_at_frame (struct frame_info *return_frame)
|
insert_step_resume_breakpoint_at_frame (struct frame_info *return_frame)
|
{
|
{
|
struct symtab_and_line sr_sal;
|
struct symtab_and_line sr_sal;
|
|
|
gdb_assert (return_frame != NULL);
|
gdb_assert (return_frame != NULL);
|
init_sal (&sr_sal); /* initialize to zeros */
|
init_sal (&sr_sal); /* initialize to zeros */
|
|
|
sr_sal.pc = gdbarch_addr_bits_remove
|
sr_sal.pc = gdbarch_addr_bits_remove
|
(current_gdbarch, get_frame_pc (return_frame));
|
(current_gdbarch, get_frame_pc (return_frame));
|
sr_sal.section = find_pc_overlay (sr_sal.pc);
|
sr_sal.section = find_pc_overlay (sr_sal.pc);
|
|
|
insert_step_resume_breakpoint_at_sal (sr_sal, get_frame_id (return_frame));
|
insert_step_resume_breakpoint_at_sal (sr_sal, get_frame_id (return_frame));
|
}
|
}
|
|
|
/* Similar to insert_step_resume_breakpoint_at_frame, except
|
/* Similar to insert_step_resume_breakpoint_at_frame, except
|
but a breakpoint at the previous frame's PC. This is used to
|
but a breakpoint at the previous frame's PC. This is used to
|
skip a function after stepping into it (for "next" or if the called
|
skip a function after stepping into it (for "next" or if the called
|
function has no debugging information).
|
function has no debugging information).
|
|
|
The current function has almost always been reached by single
|
The current function has almost always been reached by single
|
stepping a call or return instruction. NEXT_FRAME belongs to the
|
stepping a call or return instruction. NEXT_FRAME belongs to the
|
current function, and the breakpoint will be set at the caller's
|
current function, and the breakpoint will be set at the caller's
|
resume address.
|
resume address.
|
|
|
This is a separate function rather than reusing
|
This is a separate function rather than reusing
|
insert_step_resume_breakpoint_at_frame in order to avoid
|
insert_step_resume_breakpoint_at_frame in order to avoid
|
get_prev_frame, which may stop prematurely (see the implementation
|
get_prev_frame, which may stop prematurely (see the implementation
|
of frame_unwind_id for an example). */
|
of frame_unwind_id for an example). */
|
|
|
static void
|
static void
|
insert_step_resume_breakpoint_at_caller (struct frame_info *next_frame)
|
insert_step_resume_breakpoint_at_caller (struct frame_info *next_frame)
|
{
|
{
|
struct symtab_and_line sr_sal;
|
struct symtab_and_line sr_sal;
|
|
|
/* We shouldn't have gotten here if we don't know where the call site
|
/* We shouldn't have gotten here if we don't know where the call site
|
is. */
|
is. */
|
gdb_assert (frame_id_p (frame_unwind_id (next_frame)));
|
gdb_assert (frame_id_p (frame_unwind_id (next_frame)));
|
|
|
init_sal (&sr_sal); /* initialize to zeros */
|
init_sal (&sr_sal); /* initialize to zeros */
|
|
|
sr_sal.pc = gdbarch_addr_bits_remove
|
sr_sal.pc = gdbarch_addr_bits_remove
|
(current_gdbarch, frame_pc_unwind (next_frame));
|
(current_gdbarch, frame_pc_unwind (next_frame));
|
sr_sal.section = find_pc_overlay (sr_sal.pc);
|
sr_sal.section = find_pc_overlay (sr_sal.pc);
|
|
|
insert_step_resume_breakpoint_at_sal (sr_sal, frame_unwind_id (next_frame));
|
insert_step_resume_breakpoint_at_sal (sr_sal, frame_unwind_id (next_frame));
|
}
|
}
|
|
|
static void
|
static void
|
stop_stepping (struct execution_control_state *ecs)
|
stop_stepping (struct execution_control_state *ecs)
|
{
|
{
|
if (debug_infrun)
|
if (debug_infrun)
|
fprintf_unfiltered (gdb_stdlog, "infrun: stop_stepping\n");
|
fprintf_unfiltered (gdb_stdlog, "infrun: stop_stepping\n");
|
|
|
/* 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)
|
{
|
{
|
/* 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 */
|
|
|
/* 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 (stepping_over_breakpoint && stop_signal != TARGET_SIGNAL_TRAP)
|
if (stepping_over_breakpoint && 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!
|
|
|
Note that insert_breakpoints won't try to re-insert
|
Note that insert_breakpoints won't try to re-insert
|
already inserted breakpoints. Therefore, we don't
|
already inserted breakpoints. Therefore, we don't
|
care if breakpoints were already inserted, or not. */
|
care if breakpoints were already inserted, or not. */
|
|
|
if (ecs->stepping_over_breakpoint)
|
if (ecs->stepping_over_breakpoint)
|
{
|
{
|
remove_breakpoints ();
|
remove_breakpoints ();
|
}
|
}
|
else
|
else
|
{
|
{
|
struct gdb_exception e;
|
struct gdb_exception e;
|
/* Stop stepping when inserting breakpoints
|
/* Stop stepping when inserting breakpoints
|
has failed. */
|
has failed. */
|
TRY_CATCH (e, RETURN_MASK_ERROR)
|
TRY_CATCH (e, RETURN_MASK_ERROR)
|
{
|
{
|
insert_breakpoints ();
|
insert_breakpoints ();
|
}
|
}
|
if (e.reason < 0)
|
if (e.reason < 0)
|
{
|
{
|
stop_stepping (ecs);
|
stop_stepping (ecs);
|
return;
|
return;
|
}
|
}
|
}
|
}
|
|
|
stepping_over_breakpoint = ecs->stepping_over_breakpoint;
|
stepping_over_breakpoint = ecs->stepping_over_breakpoint;
|
|
|
/* 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 && !signal_program[stop_signal])
|
if (stop_signal == TARGET_SIGNAL_TRAP && !signal_program[stop_signal])
|
stop_signal = TARGET_SIGNAL_0;
|
stop_signal = TARGET_SIGNAL_0;
|
|
|
|
|
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 (debug_infrun)
|
if (debug_infrun)
|
fprintf_unfiltered (gdb_stdlog, "infrun: prepare_to_wait\n");
|
fprintf_unfiltered (gdb_stdlog, "infrun: prepare_to_wait\n");
|
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_ptid = pid_to_ptid (-1);
|
ecs->waiton_ptid = pid_to_ptid (-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 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. */
|
/* 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 (ui_out_is_mi_like_p (uiout))
|
if (ui_out_is_mi_like_p (uiout))
|
ui_out_field_string
|
ui_out_field_string
|
(uiout, "reason",
|
(uiout, "reason",
|
async_reason_lookup (EXEC_ASYNC_END_STEPPING_RANGE));
|
async_reason_lookup (EXEC_ASYNC_END_STEPPING_RANGE));
|
break;
|
break;
|
case SIGNAL_EXITED:
|
case SIGNAL_EXITED:
|
/* The inferior was terminated by a signal. */
|
/* The inferior was terminated by a signal. */
|
annotate_signalled ();
|
annotate_signalled ();
|
if (ui_out_is_mi_like_p (uiout))
|
if (ui_out_is_mi_like_p (uiout))
|
ui_out_field_string
|
ui_out_field_string
|
(uiout, "reason",
|
(uiout, "reason",
|
async_reason_lookup (EXEC_ASYNC_EXITED_SIGNALLED));
|
async_reason_lookup (EXEC_ASYNC_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",
|
ui_out_field_string (uiout, "signal-name",
|
target_signal_to_name (stop_info));
|
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",
|
ui_out_field_string (uiout, "signal-meaning",
|
target_signal_to_string (stop_info));
|
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");
|
break;
|
break;
|
case EXITED:
|
case EXITED:
|
/* The inferior program is finished. */
|
/* The inferior program is finished. */
|
annotate_exited (stop_info);
|
annotate_exited (stop_info);
|
if (stop_info)
|
if (stop_info)
|
{
|
{
|
if (ui_out_is_mi_like_p (uiout))
|
if (ui_out_is_mi_like_p (uiout))
|
ui_out_field_string (uiout, "reason",
|
ui_out_field_string (uiout, "reason",
|
async_reason_lookup (EXEC_ASYNC_EXITED));
|
async_reason_lookup (EXEC_ASYNC_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",
|
ui_out_field_fmt (uiout, "exit-code", "0%o",
|
(unsigned int) stop_info);
|
(unsigned int) stop_info);
|
ui_out_text (uiout, ".\n");
|
ui_out_text (uiout, ".\n");
|
}
|
}
|
else
|
else
|
{
|
{
|
if (ui_out_is_mi_like_p (uiout))
|
if (ui_out_is_mi_like_p (uiout))
|
ui_out_field_string
|
ui_out_field_string
|
(uiout, "reason",
|
(uiout, "reason",
|
async_reason_lookup (EXEC_ASYNC_EXITED_NORMALLY));
|
async_reason_lookup (EXEC_ASYNC_EXITED_NORMALLY));
|
ui_out_text (uiout, "\nProgram exited normally.\n");
|
ui_out_text (uiout, "\nProgram exited normally.\n");
|
}
|
}
|
/* Support the --return-child-result option. */
|
/* Support the --return-child-result option. */
|
return_child_result_value = stop_info;
|
return_child_result_value = stop_info;
|
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. */
|
annotate_signal ();
|
annotate_signal ();
|
ui_out_text (uiout, "\nProgram received signal ");
|
ui_out_text (uiout, "\nProgram received signal ");
|
annotate_signal_name ();
|
annotate_signal_name ();
|
if (ui_out_is_mi_like_p (uiout))
|
if (ui_out_is_mi_like_p (uiout))
|
ui_out_field_string
|
ui_out_field_string
|
(uiout, "reason", async_reason_lookup (EXEC_ASYNC_SIGNAL_RECEIVED));
|
(uiout, "reason", async_reason_lookup (EXEC_ASYNC_SIGNAL_RECEIVED));
|
ui_out_field_string (uiout, "signal-name",
|
ui_out_field_string (uiout, "signal-name",
|
target_signal_to_name (stop_info));
|
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",
|
ui_out_field_string (uiout, "signal-meaning",
|
target_signal_to_string (stop_info));
|
target_signal_to_string (stop_info));
|
annotate_signal_string_end ();
|
annotate_signal_string_end ();
|
ui_out_text (uiout, ".\n");
|
ui_out_text (uiout, ".\n");
|
break;
|
break;
|
default:
|
default:
|
internal_error (__FILE__, __LINE__,
|
internal_error (__FILE__, __LINE__,
|
_("print_stop_reason: unrecognized enum value"));
|
_("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)
|
{
|
{
|
struct target_waitstatus last;
|
struct target_waitstatus last;
|
ptid_t last_ptid;
|
ptid_t last_ptid;
|
|
|
get_last_target_status (&last_ptid, &last);
|
get_last_target_status (&last_ptid, &last);
|
|
|
/* 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.
|
|
|
There's no point in saying anything if the inferior has exited.
|
There's no point in saying anything if the inferior has exited.
|
Note that SIGNALLED here means "exited with a signal", not
|
Note that SIGNALLED here means "exited with a signal", not
|
"received a signal". */
|
"received a signal". */
|
if (!ptid_equal (previous_inferior_ptid, inferior_ptid)
|
if (!ptid_equal (previous_inferior_ptid, inferior_ptid)
|
&& target_has_execution
|
&& target_has_execution
|
&& last.kind != TARGET_WAITKIND_SIGNALLED
|
&& last.kind != TARGET_WAITKIND_SIGNALLED
|
&& last.kind != TARGET_WAITKIND_EXITED)
|
&& last.kind != TARGET_WAITKIND_EXITED)
|
{
|
{
|
target_terminal_ours_for_output ();
|
target_terminal_ours_for_output ();
|
printf_filtered (_("[Switching to %s]\n"),
|
printf_filtered (_("[Switching to %s]\n"),
|
target_pid_to_str (inferior_ptid));
|
target_pid_to_str (inferior_ptid));
|
previous_inferior_ptid = inferior_ptid;
|
previous_inferior_ptid = inferior_ptid;
|
}
|
}
|
|
|
/* NOTE drow/2004-01-17: Is this still necessary? */
|
/* NOTE drow/2004-01-17: Is this still necessary? */
|
/* 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
|
gdbarch_decr_pc_after_break */
|
gdbarch_decr_pc_after_break */
|
if (target_has_execution)
|
if (target_has_execution)
|
/* FIXME: cagney/2002-12-06: Has the PC changed? Thanks to
|
/* FIXME: cagney/2002-12-06: Has the PC changed? Thanks to
|
gdbarch_decr_pc_after_break, the program counter can change. Ask the
|
gdbarch_decr_pc_after_break, the program counter can change. Ask the
|
frame code to check for this and sort out any resultant mess.
|
frame code to check for this and sort out any resultant mess.
|
gdbarch_decr_pc_after_break needs to just go away. */
|
gdbarch_decr_pc_after_break needs to just go away. */
|
deprecated_update_frame_pc_hack (get_current_frame (), read_pc ());
|
deprecated_update_frame_pc_hack (get_current_frame (), read_pc ());
|
|
|
if (target_has_execution)
|
if (target_has_execution)
|
{
|
{
|
if (remove_breakpoints ())
|
if (remove_breakpoints ())
|
{
|
{
|
target_terminal_ours_for_output ();
|
target_terminal_ours_for_output ();
|
printf_filtered (_("\
|
printf_filtered (_("\
|
Cannot remove breakpoints because program is no longer writable.\n\
|
Cannot remove breakpoints because program is no longer writable.\n\
|
It might be running in another process.\n\
|
It might be running in another process.\n\
|
Further execution is probably impossible.\n"));
|
Further execution is probably impossible.\n"));
|
}
|
}
|
}
|
}
|
|
|
/* 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 ();
|
|
|
/* Set the current source location. This will also happen if we
|
/* Set the current source location. This will also happen if we
|
display the frame below, but the current SAL will be incorrect
|
display the frame below, but the current SAL will be incorrect
|
during a user hook-stop function. */
|
during a user hook-stop function. */
|
if (target_has_stack && !stop_stack_dummy)
|
if (target_has_stack && !stop_stack_dummy)
|
set_current_sal_from_frame (get_current_frame (), 1);
|
set_current_sal_from_frame (get_current_frame (), 1);
|
|
|
/* Look up the hook_stop and run it (CLI internally handles problem
|
/* Look up the hook_stop and run it (CLI internally handles problem
|
of stop_command's pre-hook not existing). */
|
of stop_command's pre-hook not existing). */
|
if (stop_command)
|
if (stop_command)
|
catch_errors (hook_stop_stub, stop_command,
|
catch_errors (hook_stop_stub, stop_command,
|
"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 ());
|
select_frame (get_current_frame ());
|
|
|
/* 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)
|
{
|
{
|
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 we had hit a shared library event breakpoint,
|
/* If we had hit a shared library event breakpoint,
|
bpstat_print would print out this message. If we hit
|
bpstat_print would print out this message. If we hit
|
an OS-level shared library event, do the same
|
an OS-level shared library event, do the same
|
thing. */
|
thing. */
|
if (last.kind == TARGET_WAITKIND_LOADED)
|
if (last.kind == TARGET_WAITKIND_LOADED)
|
{
|
{
|
printf_filtered (_("Stopped due to shared library event\n"));
|
printf_filtered (_("Stopped due to shared library event\n"));
|
source_flag = SRC_LINE; /* something bogus */
|
source_flag = SRC_LINE; /* something bogus */
|
do_frame_printing = 0;
|
do_frame_printing = 0;
|
break;
|
break;
|
}
|
}
|
|
|
/* FIXME: cagney/2002-12-01: Given that a frame ID does
|
/* FIXME: cagney/2002-12-01: Given that a frame ID does
|
(or should) carry around the function and does (or
|
(or should) carry around the function and does (or
|
should) use that when doing a frame comparison. */
|
should) use that when doing a frame comparison. */
|
if (stop_step
|
if (stop_step
|
&& frame_id_eq (step_frame_id,
|
&& frame_id_eq (step_frame_id,
|
get_frame_id (get_current_frame ()))
|
get_frame_id (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:
|
source_flag = SRC_LINE; /* something bogus */
|
source_flag = SRC_LINE; /* something bogus */
|
do_frame_printing = 0;
|
do_frame_printing = 0;
|
break;
|
break;
|
default:
|
default:
|
internal_error (__FILE__, __LINE__, _("Unknown value."));
|
internal_error (__FILE__, __LINE__, _("Unknown value."));
|
}
|
}
|
|
|
if (ui_out_is_mi_like_p (uiout))
|
if (ui_out_is_mi_like_p (uiout))
|
ui_out_field_int (uiout, "thread-id",
|
ui_out_field_int (uiout, "thread-id",
|
pid_to_thread_id (inferior_ptid));
|
pid_to_thread_id (inferior_ptid));
|
/* 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)
|
print_stack_frame (get_selected_frame (NULL), 0, source_flag);
|
print_stack_frame (get_selected_frame (NULL), 0, 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)
|
{
|
{
|
/* This should not be necessary. */
|
/* This should not be necessary. */
|
if (stop_registers)
|
if (stop_registers)
|
regcache_xfree (stop_registers);
|
regcache_xfree (stop_registers);
|
|
|
/* NB: The copy goes through to the target picking up the value of
|
/* NB: The copy goes through to the target picking up the value of
|
all the registers. */
|
all the registers. */
|
stop_registers = regcache_dup (get_current_regcache ());
|
stop_registers = regcache_dup (get_current_regcache ());
|
}
|
}
|
|
|
if (stop_stack_dummy)
|
if (stop_stack_dummy)
|
{
|
{
|
/* Pop the empty frame that contains the stack dummy. POP_FRAME
|
/* Pop the empty frame that contains the stack dummy. POP_FRAME
|
ends with a setting of the current frame, so we can use that
|
ends with a setting of the current frame, so we can use that
|
next. */
|
next. */
|
frame_pop (get_current_frame ());
|
frame_pop (get_current_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 ());
|
select_frame (get_current_frame ());
|
}
|
}
|
|
|
done:
|
done:
|
annotate_stopped ();
|
annotate_stopped ();
|
observer_notify_normal_stop (stop_bpstat);
|
observer_notify_normal_stop (stop_bpstat);
|
}
|
}
|
|
|
static int
|
static int
|
hook_stop_stub (void *cmd)
|
hook_stop_stub (void *cmd)
|
{
|
{
|
execute_cmd_pre_hook ((struct cmd_list_element *) cmd);
|
execute_cmd_pre_hook ((struct cmd_list_element *) cmd);
|
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
|
int
|
signal_stop_update (int signo, int state)
|
signal_stop_update (int signo, 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
|
int
|
signal_print_update (int signo, int state)
|
signal_print_update (int signo, 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
|
int
|
signal_pass_update (int signo, int state)
|
signal_pass_update (int signo, 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? ", target_signal_to_name ((enum target_signal) signum)))
|
Are you sure you want to change it? ", target_signal_to_name ((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_ptid);
|
target_notice_signals (inferior_ptid);
|
|
|
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)
|
xfree (argBuf);
|
xfree (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_long (signum_exp));
|
target_signal_from_command (parse_and_eval_long (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_0)
|
&& oursig != TARGET_SIGNAL_DEFAULT && 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 stepping_over_breakpoint;
|
int stepping_over_breakpoint;
|
CORE_ADDR step_range_start;
|
CORE_ADDR step_range_start;
|
CORE_ADDR step_range_end;
|
CORE_ADDR step_range_end;
|
struct frame_id step_frame_id;
|
struct frame_id step_frame_id;
|
enum step_over_calls_kind step_over_calls;
|
enum step_over_calls_kind 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;
|
int stop_soon;
|
|
|
/* 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. */
|
struct regcache *registers;
|
struct regcache *registers;
|
|
|
/* A frame unique identifier. */
|
/* A frame unique identifier. */
|
struct frame_id selected_frame_id;
|
struct frame_id selected_frame_id;
|
|
|
int breakpoint_proceeded;
|
int breakpoint_proceeded;
|
int restore_stack_info;
|
int restore_stack_info;
|
int proceed_to_finish;
|
int proceed_to_finish;
|
};
|
};
|
|
|
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_size (current_gdbarch, regno);
|
int size = register_size (current_gdbarch, regno);
|
void *buf = alloca (size);
|
void *buf = alloca (size);
|
store_signed_integer (buf, size, val);
|
store_signed_integer (buf, size, val);
|
regcache_raw_write (inf_status->registers, regno, buf);
|
regcache_raw_write (inf_status->registers, regno, buf);
|
}
|
}
|
|
|
/* 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 (struct inferior_status);
|
struct inferior_status *inf_status = XMALLOC (struct 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->stepping_over_breakpoint = stepping_over_breakpoint;
|
inf_status->stepping_over_breakpoint = stepping_over_breakpoint;
|
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_id = step_frame_id;
|
inf_status->step_frame_id = step_frame_id;
|
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 = stop_soon;
|
inf_status->stop_soon = stop_soon;
|
/* 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;
|
|
|
inf_status->registers = regcache_dup (get_current_regcache ());
|
inf_status->registers = regcache_dup (get_current_regcache ());
|
|
|
inf_status->selected_frame_id = get_frame_id (get_selected_frame (NULL));
|
inf_status->selected_frame_id = get_frame_id (get_selected_frame (NULL));
|
return inf_status;
|
return inf_status;
|
}
|
}
|
|
|
static int
|
static int
|
restore_selected_frame (void *args)
|
restore_selected_frame (void *args)
|
{
|
{
|
struct frame_id *fid = (struct frame_id *) args;
|
struct frame_id *fid = (struct frame_id *) args;
|
struct frame_info *frame;
|
struct frame_info *frame;
|
|
|
frame = frame_find_by_id (*fid);
|
frame = frame_find_by_id (*fid);
|
|
|
/* If inf_status->selected_frame_id is NULL, there was no previously
|
/* If inf_status->selected_frame_id is NULL, there was no previously
|
selected frame. */
|
selected frame. */
|
if (frame == NULL)
|
if (frame == NULL)
|
{
|
{
|
warning (_("Unable to restore previously selected frame."));
|
warning (_("Unable to restore previously selected frame."));
|
return 0;
|
return 0;
|
}
|
}
|
|
|
select_frame (frame);
|
select_frame (frame);
|
|
|
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;
|
stepping_over_breakpoint = inf_status->stepping_over_breakpoint;
|
stepping_over_breakpoint = inf_status->stepping_over_breakpoint;
|
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_id = inf_status->step_frame_id;
|
step_frame_id = inf_status->step_frame_id;
|
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 = inf_status->stop_soon;
|
stop_soon = inf_status->stop_soon;
|
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;
|
|
|
/* 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)
|
/* NB: The register write goes through to the target. */
|
/* NB: The register write goes through to the target. */
|
regcache_cpy (get_current_regcache (), inf_status->registers);
|
regcache_cpy (get_current_regcache (), inf_status->registers);
|
regcache_xfree (inf_status->registers);
|
regcache_xfree (inf_status->registers);
|
|
|
/* 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)
|
{
|
{
|
/* 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
|
walking the stack might encounter a garbage pointer and
|
error() trying to dereference it. */
|
error() trying to dereference it. */
|
if (catch_errors
|
if (catch_errors
|
(restore_selected_frame, &inf_status->selected_frame_id,
|
(restore_selected_frame, &inf_status->selected_frame_id,
|
"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 ());
|
select_frame (get_current_frame ());
|
|
|
}
|
}
|
|
|
xfree (inf_status);
|
xfree (inf_status);
|
}
|
}
|
|
|
static void
|
static void
|
do_restore_inferior_status_cleanup (void *sts)
|
do_restore_inferior_status_cleanup (void *sts)
|
{
|
{
|
restore_inferior_status (sts);
|
restore_inferior_status (sts);
|
}
|
}
|
|
|
struct cleanup *
|
struct cleanup *
|
make_cleanup_restore_inferior_status (struct inferior_status *inf_status)
|
make_cleanup_restore_inferior_status (struct inferior_status *inf_status)
|
{
|
{
|
return make_cleanup (do_restore_inferior_status_cleanup, inf_status);
|
return make_cleanup (do_restore_inferior_status_cleanup, 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);
|
regcache_xfree (inf_status->registers);
|
regcache_xfree (inf_status->registers);
|
xfree (inf_status);
|
xfree (inf_status);
|
}
|
}
|
|
|
int
|
int
|
inferior_has_forked (int pid, int *child_pid)
|
inferior_has_forked (int pid, int *child_pid)
|
{
|
{
|
struct target_waitstatus last;
|
struct target_waitstatus last;
|
ptid_t last_ptid;
|
ptid_t last_ptid;
|
|
|
get_last_target_status (&last_ptid, &last);
|
get_last_target_status (&last_ptid, &last);
|
|
|
if (last.kind != TARGET_WAITKIND_FORKED)
|
if (last.kind != TARGET_WAITKIND_FORKED)
|
return 0;
|
return 0;
|
|
|
if (ptid_get_pid (last_ptid) != pid)
|
if (ptid_get_pid (last_ptid) != pid)
|
return 0;
|
return 0;
|
|
|
*child_pid = last.value.related_pid;
|
*child_pid = last.value.related_pid;
|
return 1;
|
return 1;
|
}
|
}
|
|
|
int
|
int
|
inferior_has_vforked (int pid, int *child_pid)
|
inferior_has_vforked (int pid, int *child_pid)
|
{
|
{
|
struct target_waitstatus last;
|
struct target_waitstatus last;
|
ptid_t last_ptid;
|
ptid_t last_ptid;
|
|
|
get_last_target_status (&last_ptid, &last);
|
get_last_target_status (&last_ptid, &last);
|
|
|
if (last.kind != TARGET_WAITKIND_VFORKED)
|
if (last.kind != TARGET_WAITKIND_VFORKED)
|
return 0;
|
return 0;
|
|
|
if (ptid_get_pid (last_ptid) != pid)
|
if (ptid_get_pid (last_ptid) != pid)
|
return 0;
|
return 0;
|
|
|
*child_pid = last.value.related_pid;
|
*child_pid = last.value.related_pid;
|
return 1;
|
return 1;
|
}
|
}
|
|
|
int
|
int
|
inferior_has_execd (int pid, char **execd_pathname)
|
inferior_has_execd (int pid, char **execd_pathname)
|
{
|
{
|
struct target_waitstatus last;
|
struct target_waitstatus last;
|
ptid_t last_ptid;
|
ptid_t last_ptid;
|
|
|
get_last_target_status (&last_ptid, &last);
|
get_last_target_status (&last_ptid, &last);
|
|
|
if (last.kind != TARGET_WAITKIND_EXECD)
|
if (last.kind != TARGET_WAITKIND_EXECD)
|
return 0;
|
return 0;
|
|
|
if (ptid_get_pid (last_ptid) != pid)
|
if (ptid_get_pid (last_ptid) != pid)
|
return 0;
|
return 0;
|
|
|
*execd_pathname = xstrdup (last.value.execd_pathname);
|
*execd_pathname = xstrdup (last.value.execd_pathname);
|
return 1;
|
return 1;
|
}
|
}
|
|
|
/* Oft used ptids */
|
/* Oft used ptids */
|
ptid_t null_ptid;
|
ptid_t null_ptid;
|
ptid_t minus_one_ptid;
|
ptid_t minus_one_ptid;
|
|
|
/* Create a ptid given the necessary PID, LWP, and TID components. */
|
/* Create a ptid given the necessary PID, LWP, and TID components. */
|
|
|
ptid_t
|
ptid_t
|
ptid_build (int pid, long lwp, long tid)
|
ptid_build (int pid, long lwp, long tid)
|
{
|
{
|
ptid_t ptid;
|
ptid_t ptid;
|
|
|
ptid.pid = pid;
|
ptid.pid = pid;
|
ptid.lwp = lwp;
|
ptid.lwp = lwp;
|
ptid.tid = tid;
|
ptid.tid = tid;
|
return ptid;
|
return ptid;
|
}
|
}
|
|
|
/* Create a ptid from just a pid. */
|
/* Create a ptid from just a pid. */
|
|
|
ptid_t
|
ptid_t
|
pid_to_ptid (int pid)
|
pid_to_ptid (int pid)
|
{
|
{
|
return ptid_build (pid, 0, 0);
|
return ptid_build (pid, 0, 0);
|
}
|
}
|
|
|
/* Fetch the pid (process id) component from a ptid. */
|
/* Fetch the pid (process id) component from a ptid. */
|
|
|
int
|
int
|
ptid_get_pid (ptid_t ptid)
|
ptid_get_pid (ptid_t ptid)
|
{
|
{
|
return ptid.pid;
|
return ptid.pid;
|
}
|
}
|
|
|
/* Fetch the lwp (lightweight process) component from a ptid. */
|
/* Fetch the lwp (lightweight process) component from a ptid. */
|
|
|
long
|
long
|
ptid_get_lwp (ptid_t ptid)
|
ptid_get_lwp (ptid_t ptid)
|
{
|
{
|
return ptid.lwp;
|
return ptid.lwp;
|
}
|
}
|
|
|
/* Fetch the tid (thread id) component from a ptid. */
|
/* Fetch the tid (thread id) component from a ptid. */
|
|
|
long
|
long
|
ptid_get_tid (ptid_t ptid)
|
ptid_get_tid (ptid_t ptid)
|
{
|
{
|
return ptid.tid;
|
return ptid.tid;
|
}
|
}
|
|
|
/* ptid_equal() is used to test equality of two ptids. */
|
/* ptid_equal() is used to test equality of two ptids. */
|
|
|
int
|
int
|
ptid_equal (ptid_t ptid1, ptid_t ptid2)
|
ptid_equal (ptid_t ptid1, ptid_t ptid2)
|
{
|
{
|
return (ptid1.pid == ptid2.pid && ptid1.lwp == ptid2.lwp
|
return (ptid1.pid == ptid2.pid && ptid1.lwp == ptid2.lwp
|
&& ptid1.tid == ptid2.tid);
|
&& ptid1.tid == ptid2.tid);
|
}
|
}
|
|
|
/* restore_inferior_ptid() will be used by the cleanup machinery
|
/* restore_inferior_ptid() will be used by the cleanup machinery
|
to restore the inferior_ptid value saved in a call to
|
to restore the inferior_ptid value saved in a call to
|
save_inferior_ptid(). */
|
save_inferior_ptid(). */
|
|
|
static void
|
static void
|
restore_inferior_ptid (void *arg)
|
restore_inferior_ptid (void *arg)
|
{
|
{
|
ptid_t *saved_ptid_ptr = arg;
|
ptid_t *saved_ptid_ptr = arg;
|
inferior_ptid = *saved_ptid_ptr;
|
inferior_ptid = *saved_ptid_ptr;
|
xfree (arg);
|
xfree (arg);
|
}
|
}
|
|
|
/* Save the value of inferior_ptid so that it may be restored by a
|
/* Save the value of inferior_ptid so that it may be restored by a
|
later call to do_cleanups(). Returns the struct cleanup pointer
|
later call to do_cleanups(). Returns the struct cleanup pointer
|
needed for later doing the cleanup. */
|
needed for later doing the cleanup. */
|
|
|
struct cleanup *
|
struct cleanup *
|
save_inferior_ptid (void)
|
save_inferior_ptid (void)
|
{
|
{
|
ptid_t *saved_ptid_ptr;
|
ptid_t *saved_ptid_ptr;
|
|
|
saved_ptid_ptr = xmalloc (sizeof (ptid_t));
|
saved_ptid_ptr = xmalloc (sizeof (ptid_t));
|
*saved_ptid_ptr = inferior_ptid;
|
*saved_ptid_ptr = inferior_ptid;
|
return make_cleanup (restore_inferior_ptid, saved_ptid_ptr);
|
return make_cleanup (restore_inferior_ptid, saved_ptid_ptr);
|
}
|
}
|
|
|
|
|
void
|
void
|
_initialize_infrun (void)
|
_initialize_infrun (void)
|
{
|
{
|
int i;
|
int i;
|
int numsigs;
|
int numsigs;
|
struct cmd_list_element *c;
|
struct cmd_list_element *c;
|
|
|
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, _("\
|
Specify how to handle a signal.\n\
|
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."));
|
Pass and Stop may be combined."));
|
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, _("\
|
Specify how to handle a signal.\n\
|
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."));
|
Pass and Stop may be combined."));
|
}
|
}
|
|
|
if (!dbx_commands)
|
if (!dbx_commands)
|
stop_command = add_cmd ("stop", class_obscure,
|
stop_command = add_cmd ("stop", class_obscure,
|
not_just_help_class_command, _("\
|
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);
|
|
|
add_setshow_zinteger_cmd ("infrun", class_maintenance, &debug_infrun, _("\
|
add_setshow_zinteger_cmd ("infrun", class_maintenance, &debug_infrun, _("\
|
Set inferior debugging."), _("\
|
Set inferior debugging."), _("\
|
Show inferior debugging."), _("\
|
Show inferior debugging."), _("\
|
When non-zero, inferior specific debugging is enabled."),
|
When non-zero, inferior specific debugging is enabled."),
|
NULL,
|
NULL,
|
show_debug_infrun,
|
show_debug_infrun,
|
&setdebuglist, &showdebuglist);
|
&setdebuglist, &showdebuglist);
|
|
|
numsigs = (int) TARGET_SIGNAL_LAST;
|
numsigs = (int) TARGET_SIGNAL_LAST;
|
signal_stop = (unsigned char *) xmalloc (sizeof (signal_stop[0]) * numsigs);
|
signal_stop = (unsigned char *) 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;
|
|
|
add_setshow_zinteger_cmd ("stop-on-solib-events", class_support,
|
add_setshow_zinteger_cmd ("stop-on-solib-events", class_support,
|
&stop_on_solib_events, _("\
|
&stop_on_solib_events, _("\
|
Set stopping for shared library events."), _("\
|
Set stopping for shared library events."), _("\
|
Show stopping for shared library events."), _("\
|
Show stopping for shared library events."), _("\
|
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."),
|
to the user would be loading/unloading of a new library."),
|
NULL,
|
NULL,
|
show_stop_on_solib_events,
|
show_stop_on_solib_events,
|
&setlist, &showlist);
|
&setlist, &showlist);
|
|
|
add_setshow_enum_cmd ("follow-fork-mode", class_run,
|
add_setshow_enum_cmd ("follow-fork-mode", class_run,
|
follow_fork_mode_kind_names,
|
follow_fork_mode_kind_names,
|
&follow_fork_mode_string, _("\
|
&follow_fork_mode_string, _("\
|
Set debugger response to a program call of fork or vfork."), _("\
|
Set debugger response to a program call of fork or vfork."), _("\
|
Show debugger response to a program call of fork or vfork."), _("\
|
Show debugger response to a program call of fork or vfork."), _("\
|
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\
|
The unfollowed process will continue to run.\n\
|
The unfollowed process will continue to run.\n\
|
By default, the debugger will follow the parent process."),
|
By default, the debugger will follow the parent process."),
|
NULL,
|
NULL,
|
show_follow_fork_mode_string,
|
show_follow_fork_mode_string,
|
&setlist, &showlist);
|
&setlist, &showlist);
|
|
|
add_setshow_enum_cmd ("scheduler-locking", class_run,
|
add_setshow_enum_cmd ("scheduler-locking", class_run,
|
scheduler_enums, &scheduler_mode, _("\
|
scheduler_enums, &scheduler_mode, _("\
|
Set mode for locking scheduler during execution."), _("\
|
Set mode for locking scheduler during execution."), _("\
|
Show mode for locking scheduler during execution."), _("\
|
Show mode for locking scheduler during execution."), _("\
|
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')."),
|
set_schedlock_func, /* traps on target vector */
|
set_schedlock_func, /* traps on target vector */
|
show_scheduler_mode,
|
show_scheduler_mode,
|
&setlist, &showlist);
|
&setlist, &showlist);
|
|
|
add_setshow_boolean_cmd ("step-mode", class_run, &step_stop_if_no_debug, _("\
|
add_setshow_boolean_cmd ("step-mode", class_run, &step_stop_if_no_debug, _("\
|
Set mode of the step operation."), _("\
|
Set mode of the step operation."), _("\
|
Show mode of the step operation."), _("\
|
Show mode of the step operation."), _("\
|
When set, doing a step over a function without debug line information\n\
|
When set, doing a step over a function without debug line information\n\
|
will stop at the first instruction of that function. Otherwise, the\n\
|
will stop at the first instruction of that function. Otherwise, the\n\
|
function is skipped and the step command stops at a different source line."),
|
function is skipped and the step command stops at a different source line."),
|
NULL,
|
NULL,
|
show_step_stop_if_no_debug,
|
show_step_stop_if_no_debug,
|
&setlist, &showlist);
|
&setlist, &showlist);
|
|
|
/* ptid initializations */
|
/* ptid initializations */
|
null_ptid = ptid_build (0, 0, 0);
|
null_ptid = ptid_build (0, 0, 0);
|
minus_one_ptid = ptid_build (-1, 0, 0);
|
minus_one_ptid = ptid_build (-1, 0, 0);
|
inferior_ptid = null_ptid;
|
inferior_ptid = null_ptid;
|
target_last_wait_ptid = minus_one_ptid;
|
target_last_wait_ptid = minus_one_ptid;
|
}
|
}
|
|
|
