/* libthread_db assisted debugging support, generic parts.
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/* libthread_db assisted debugging support, generic parts.
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Copyright (C) 1999, 2000, 2001, 2003, 2004, 2005, 2006, 2007, 2008
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Copyright (C) 1999, 2000, 2001, 2003, 2004, 2005, 2006, 2007, 2008
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Free Software Foundation, Inc.
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Free Software Foundation, Inc.
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This file is part of GDB.
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This file is part of GDB.
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This program is free software; you can redistribute it and/or modify
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3 of the License, or
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the Free Software Foundation; either version 3 of the License, or
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(at your option) any later version.
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>. */
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along with this program. If not, see <http://www.gnu.org/licenses/>. */
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#include "defs.h"
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#include "defs.h"
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#include "gdb_assert.h"
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#include "gdb_assert.h"
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#include <dlfcn.h>
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#include <dlfcn.h>
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#include "gdb_proc_service.h"
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#include "gdb_proc_service.h"
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#include "gdb_thread_db.h"
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#include "gdb_thread_db.h"
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#include "bfd.h"
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#include "bfd.h"
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#include "exceptions.h"
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#include "exceptions.h"
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#include "gdbthread.h"
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#include "gdbthread.h"
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#include "inferior.h"
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#include "inferior.h"
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#include "symfile.h"
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#include "symfile.h"
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#include "objfiles.h"
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#include "objfiles.h"
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#include "target.h"
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#include "target.h"
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#include "regcache.h"
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#include "regcache.h"
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#include "solib-svr4.h"
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#include "solib-svr4.h"
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#include "gdbcore.h"
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#include "gdbcore.h"
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#include "observer.h"
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#include "observer.h"
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#include "linux-nat.h"
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#include "linux-nat.h"
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#include <signal.h>
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#include <signal.h>
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#ifdef HAVE_GNU_LIBC_VERSION_H
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#ifdef HAVE_GNU_LIBC_VERSION_H
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#include <gnu/libc-version.h>
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#include <gnu/libc-version.h>
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#endif
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#endif
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#ifndef LIBTHREAD_DB_SO
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#ifndef LIBTHREAD_DB_SO
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#define LIBTHREAD_DB_SO "libthread_db.so.1"
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#define LIBTHREAD_DB_SO "libthread_db.so.1"
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#endif
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#endif
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/* If we're running on GNU/Linux, we must explicitly attach to any new
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/* If we're running on GNU/Linux, we must explicitly attach to any new
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threads. */
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threads. */
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/* This module's target vector. */
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/* This module's target vector. */
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static struct target_ops thread_db_ops;
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static struct target_ops thread_db_ops;
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/* The target vector that we call for things this module can't handle. */
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/* The target vector that we call for things this module can't handle. */
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static struct target_ops *target_beneath;
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static struct target_ops *target_beneath;
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/* Non-zero if we're using this module's target vector. */
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/* Non-zero if we're using this module's target vector. */
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static int using_thread_db;
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static int using_thread_db;
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/* Non-zero if we have determined the signals used by the threads
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/* Non-zero if we have determined the signals used by the threads
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library. */
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library. */
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static int thread_signals;
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static int thread_signals;
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static sigset_t thread_stop_set;
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static sigset_t thread_stop_set;
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static sigset_t thread_print_set;
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static sigset_t thread_print_set;
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/* Structure that identifies the child process for the
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/* Structure that identifies the child process for the
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<proc_service.h> interface. */
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<proc_service.h> interface. */
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static struct ps_prochandle proc_handle;
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static struct ps_prochandle proc_handle;
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/* Connection to the libthread_db library. */
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/* Connection to the libthread_db library. */
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static td_thragent_t *thread_agent;
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static td_thragent_t *thread_agent;
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/* Pointers to the libthread_db functions. */
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/* Pointers to the libthread_db functions. */
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static td_err_e (*td_init_p) (void);
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static td_err_e (*td_init_p) (void);
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static td_err_e (*td_ta_new_p) (struct ps_prochandle * ps,
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static td_err_e (*td_ta_new_p) (struct ps_prochandle * ps,
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td_thragent_t **ta);
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td_thragent_t **ta);
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static td_err_e (*td_ta_map_id2thr_p) (const td_thragent_t *ta, thread_t pt,
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static td_err_e (*td_ta_map_id2thr_p) (const td_thragent_t *ta, thread_t pt,
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td_thrhandle_t *__th);
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td_thrhandle_t *__th);
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static td_err_e (*td_ta_map_lwp2thr_p) (const td_thragent_t *ta,
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static td_err_e (*td_ta_map_lwp2thr_p) (const td_thragent_t *ta,
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lwpid_t lwpid, td_thrhandle_t *th);
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lwpid_t lwpid, td_thrhandle_t *th);
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static td_err_e (*td_ta_thr_iter_p) (const td_thragent_t *ta,
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static td_err_e (*td_ta_thr_iter_p) (const td_thragent_t *ta,
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td_thr_iter_f *callback, void *cbdata_p,
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td_thr_iter_f *callback, void *cbdata_p,
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td_thr_state_e state, int ti_pri,
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td_thr_state_e state, int ti_pri,
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sigset_t *ti_sigmask_p,
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sigset_t *ti_sigmask_p,
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unsigned int ti_user_flags);
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unsigned int ti_user_flags);
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static td_err_e (*td_ta_event_addr_p) (const td_thragent_t *ta,
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static td_err_e (*td_ta_event_addr_p) (const td_thragent_t *ta,
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td_event_e event, td_notify_t *ptr);
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td_event_e event, td_notify_t *ptr);
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static td_err_e (*td_ta_set_event_p) (const td_thragent_t *ta,
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static td_err_e (*td_ta_set_event_p) (const td_thragent_t *ta,
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td_thr_events_t *event);
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td_thr_events_t *event);
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static td_err_e (*td_ta_event_getmsg_p) (const td_thragent_t *ta,
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static td_err_e (*td_ta_event_getmsg_p) (const td_thragent_t *ta,
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td_event_msg_t *msg);
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td_event_msg_t *msg);
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static td_err_e (*td_thr_validate_p) (const td_thrhandle_t *th);
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static td_err_e (*td_thr_validate_p) (const td_thrhandle_t *th);
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static td_err_e (*td_thr_get_info_p) (const td_thrhandle_t *th,
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static td_err_e (*td_thr_get_info_p) (const td_thrhandle_t *th,
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td_thrinfo_t *infop);
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td_thrinfo_t *infop);
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static td_err_e (*td_thr_event_enable_p) (const td_thrhandle_t *th,
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static td_err_e (*td_thr_event_enable_p) (const td_thrhandle_t *th,
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int event);
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int event);
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static td_err_e (*td_thr_tls_get_addr_p) (const td_thrhandle_t *th,
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static td_err_e (*td_thr_tls_get_addr_p) (const td_thrhandle_t *th,
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void *map_address,
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void *map_address,
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size_t offset, void **address);
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size_t offset, void **address);
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/* Location of the thread creation event breakpoint. The code at this
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/* Location of the thread creation event breakpoint. The code at this
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location in the child process will be called by the pthread library
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location in the child process will be called by the pthread library
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whenever a new thread is created. By setting a special breakpoint
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whenever a new thread is created. By setting a special breakpoint
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at this location, GDB can detect when a new thread is created. We
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at this location, GDB can detect when a new thread is created. We
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obtain this location via the td_ta_event_addr call. */
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obtain this location via the td_ta_event_addr call. */
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static CORE_ADDR td_create_bp_addr;
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static CORE_ADDR td_create_bp_addr;
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/* Location of the thread death event breakpoint. */
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/* Location of the thread death event breakpoint. */
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static CORE_ADDR td_death_bp_addr;
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static CORE_ADDR td_death_bp_addr;
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/* Prototypes for local functions. */
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/* Prototypes for local functions. */
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static void thread_db_find_new_threads (void);
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static void thread_db_find_new_threads (void);
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static void attach_thread (ptid_t ptid, const td_thrhandle_t *th_p,
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static void attach_thread (ptid_t ptid, const td_thrhandle_t *th_p,
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const td_thrinfo_t *ti_p);
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const td_thrinfo_t *ti_p);
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static void detach_thread (ptid_t ptid, int verbose);
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static void detach_thread (ptid_t ptid, int verbose);
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/* Building process ids. */
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/* Building process ids. */
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#define GET_PID(ptid) ptid_get_pid (ptid)
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#define GET_PID(ptid) ptid_get_pid (ptid)
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#define GET_LWP(ptid) ptid_get_lwp (ptid)
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#define GET_LWP(ptid) ptid_get_lwp (ptid)
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#define GET_THREAD(ptid) ptid_get_tid (ptid)
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#define GET_THREAD(ptid) ptid_get_tid (ptid)
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#define is_lwp(ptid) (GET_LWP (ptid) != 0)
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#define is_lwp(ptid) (GET_LWP (ptid) != 0)
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#define is_thread(ptid) (GET_THREAD (ptid) != 0)
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#define is_thread(ptid) (GET_THREAD (ptid) != 0)
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#define BUILD_LWP(lwp, pid) ptid_build (pid, lwp, 0)
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#define BUILD_LWP(lwp, pid) ptid_build (pid, lwp, 0)
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/* Use "struct private_thread_info" to cache thread state. This is
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/* Use "struct private_thread_info" to cache thread state. This is
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a substantial optimization. */
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a substantial optimization. */
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struct private_thread_info
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struct private_thread_info
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{
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{
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/* Flag set when we see a TD_DEATH event for this thread. */
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/* Flag set when we see a TD_DEATH event for this thread. */
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unsigned int dying:1;
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unsigned int dying:1;
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/* Cached thread state. */
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/* Cached thread state. */
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unsigned int th_valid:1;
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unsigned int th_valid:1;
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unsigned int ti_valid:1;
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unsigned int ti_valid:1;
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td_thrhandle_t th;
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td_thrhandle_t th;
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td_thrinfo_t ti;
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td_thrinfo_t ti;
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};
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};
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static char *
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static char *
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thread_db_err_str (td_err_e err)
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thread_db_err_str (td_err_e err)
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{
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{
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static char buf[64];
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static char buf[64];
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switch (err)
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switch (err)
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{
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{
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case TD_OK:
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case TD_OK:
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return "generic 'call succeeded'";
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return "generic 'call succeeded'";
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case TD_ERR:
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case TD_ERR:
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return "generic error";
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return "generic error";
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case TD_NOTHR:
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case TD_NOTHR:
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return "no thread to satisfy query";
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return "no thread to satisfy query";
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case TD_NOSV:
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case TD_NOSV:
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return "no sync handle to satisfy query";
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return "no sync handle to satisfy query";
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case TD_NOLWP:
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case TD_NOLWP:
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return "no LWP to satisfy query";
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return "no LWP to satisfy query";
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case TD_BADPH:
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case TD_BADPH:
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return "invalid process handle";
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return "invalid process handle";
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case TD_BADTH:
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case TD_BADTH:
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return "invalid thread handle";
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return "invalid thread handle";
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case TD_BADSH:
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case TD_BADSH:
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return "invalid synchronization handle";
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return "invalid synchronization handle";
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case TD_BADTA:
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case TD_BADTA:
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return "invalid thread agent";
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return "invalid thread agent";
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case TD_BADKEY:
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case TD_BADKEY:
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return "invalid key";
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return "invalid key";
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case TD_NOMSG:
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case TD_NOMSG:
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return "no event message for getmsg";
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return "no event message for getmsg";
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case TD_NOFPREGS:
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case TD_NOFPREGS:
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return "FPU register set not available";
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return "FPU register set not available";
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case TD_NOLIBTHREAD:
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case TD_NOLIBTHREAD:
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return "application not linked with libthread";
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return "application not linked with libthread";
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case TD_NOEVENT:
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case TD_NOEVENT:
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return "requested event is not supported";
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return "requested event is not supported";
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case TD_NOCAPAB:
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case TD_NOCAPAB:
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return "capability not available";
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return "capability not available";
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case TD_DBERR:
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case TD_DBERR:
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return "debugger service failed";
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return "debugger service failed";
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case TD_NOAPLIC:
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case TD_NOAPLIC:
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return "operation not applicable to";
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return "operation not applicable to";
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case TD_NOTSD:
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case TD_NOTSD:
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return "no thread-specific data for this thread";
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return "no thread-specific data for this thread";
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case TD_MALLOC:
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case TD_MALLOC:
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return "malloc failed";
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return "malloc failed";
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case TD_PARTIALREG:
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case TD_PARTIALREG:
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return "only part of register set was written/read";
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return "only part of register set was written/read";
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case TD_NOXREGS:
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case TD_NOXREGS:
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return "X register set not available for this thread";
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return "X register set not available for this thread";
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#ifdef THREAD_DB_HAS_TD_NOTALLOC
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#ifdef THREAD_DB_HAS_TD_NOTALLOC
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case TD_NOTALLOC:
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case TD_NOTALLOC:
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return "thread has not yet allocated TLS for given module";
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return "thread has not yet allocated TLS for given module";
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#endif
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#endif
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#ifdef THREAD_DB_HAS_TD_VERSION
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#ifdef THREAD_DB_HAS_TD_VERSION
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case TD_VERSION:
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case TD_VERSION:
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return "versions of libpthread and libthread_db do not match";
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return "versions of libpthread and libthread_db do not match";
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#endif
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#endif
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#ifdef THREAD_DB_HAS_TD_NOTLS
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#ifdef THREAD_DB_HAS_TD_NOTLS
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case TD_NOTLS:
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case TD_NOTLS:
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return "there is no TLS segment in the given module";
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return "there is no TLS segment in the given module";
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#endif
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#endif
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default:
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default:
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snprintf (buf, sizeof (buf), "unknown thread_db error '%d'", err);
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snprintf (buf, sizeof (buf), "unknown thread_db error '%d'", err);
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return buf;
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return buf;
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}
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}
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}
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}
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/* Return 1 if any threads have been registered. There may be none if
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/* Return 1 if any threads have been registered. There may be none if
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the threading library is not fully initialized yet. */
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the threading library is not fully initialized yet. */
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static int
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static int
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have_threads_callback (struct thread_info *thread, void *dummy)
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have_threads_callback (struct thread_info *thread, void *dummy)
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{
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{
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return 1;
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return 1;
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}
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}
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static int
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static int
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have_threads (void)
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have_threads (void)
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{
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{
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return iterate_over_threads (have_threads_callback, NULL) != NULL;
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return iterate_over_threads (have_threads_callback, NULL) != NULL;
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}
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}
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/* A callback function for td_ta_thr_iter, which we use to map all
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/* A callback function for td_ta_thr_iter, which we use to map all
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threads to LWPs.
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threads to LWPs.
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THP is a handle to the current thread; if INFOP is not NULL, the
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THP is a handle to the current thread; if INFOP is not NULL, the
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struct thread_info associated with this thread is returned in
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struct thread_info associated with this thread is returned in
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*INFOP.
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*INFOP.
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If the thread is a zombie, TD_THR_ZOMBIE is returned. Otherwise,
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If the thread is a zombie, TD_THR_ZOMBIE is returned. Otherwise,
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zero is returned to indicate success. */
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zero is returned to indicate success. */
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static int
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static int
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thread_get_info_callback (const td_thrhandle_t *thp, void *infop)
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thread_get_info_callback (const td_thrhandle_t *thp, void *infop)
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{
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{
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td_thrinfo_t ti;
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td_thrinfo_t ti;
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td_err_e err;
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td_err_e err;
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struct thread_info *thread_info;
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struct thread_info *thread_info;
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ptid_t thread_ptid;
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ptid_t thread_ptid;
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err = td_thr_get_info_p (thp, &ti);
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err = td_thr_get_info_p (thp, &ti);
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if (err != TD_OK)
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if (err != TD_OK)
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error (_("thread_get_info_callback: cannot get thread info: %s"),
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error (_("thread_get_info_callback: cannot get thread info: %s"),
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thread_db_err_str (err));
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thread_db_err_str (err));
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/* Fill the cache. */
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/* Fill the cache. */
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thread_ptid = ptid_build (GET_PID (inferior_ptid), ti.ti_lid, ti.ti_tid);
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thread_ptid = ptid_build (GET_PID (inferior_ptid), ti.ti_lid, ti.ti_tid);
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thread_info = find_thread_pid (thread_ptid);
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thread_info = find_thread_pid (thread_ptid);
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/* In the case of a zombie thread, don't continue. We don't want to
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/* In the case of a zombie thread, don't continue. We don't want to
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attach to it thinking it is a new thread. */
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attach to it thinking it is a new thread. */
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if (ti.ti_state == TD_THR_UNKNOWN || ti.ti_state == TD_THR_ZOMBIE)
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if (ti.ti_state == TD_THR_UNKNOWN || ti.ti_state == TD_THR_ZOMBIE)
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{
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{
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if (infop != NULL)
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if (infop != NULL)
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*(struct thread_info **) infop = thread_info;
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*(struct thread_info **) infop = thread_info;
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if (thread_info != NULL)
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if (thread_info != NULL)
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{
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{
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memcpy (&thread_info->private->th, thp, sizeof (*thp));
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memcpy (&thread_info->private->th, thp, sizeof (*thp));
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thread_info->private->th_valid = 1;
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thread_info->private->th_valid = 1;
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memcpy (&thread_info->private->ti, &ti, sizeof (ti));
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memcpy (&thread_info->private->ti, &ti, sizeof (ti));
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thread_info->private->ti_valid = 1;
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thread_info->private->ti_valid = 1;
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}
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}
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return TD_THR_ZOMBIE;
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return TD_THR_ZOMBIE;
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}
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}
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if (thread_info == NULL)
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if (thread_info == NULL)
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{
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{
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/* New thread. Attach to it now (why wait?). */
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/* New thread. Attach to it now (why wait?). */
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attach_thread (thread_ptid, thp, &ti);
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attach_thread (thread_ptid, thp, &ti);
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thread_info = find_thread_pid (thread_ptid);
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thread_info = find_thread_pid (thread_ptid);
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gdb_assert (thread_info != NULL);
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gdb_assert (thread_info != NULL);
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}
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}
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memcpy (&thread_info->private->th, thp, sizeof (*thp));
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memcpy (&thread_info->private->th, thp, sizeof (*thp));
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thread_info->private->th_valid = 1;
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thread_info->private->th_valid = 1;
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memcpy (&thread_info->private->ti, &ti, sizeof (ti));
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memcpy (&thread_info->private->ti, &ti, sizeof (ti));
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thread_info->private->ti_valid = 1;
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thread_info->private->ti_valid = 1;
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if (infop != NULL)
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if (infop != NULL)
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*(struct thread_info **) infop = thread_info;
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*(struct thread_info **) infop = thread_info;
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return 0;
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return 0;
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}
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}
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/* Accessor functions for the thread_db information, with caching. */
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/* Accessor functions for the thread_db information, with caching. */
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static void
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static void
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thread_db_map_id2thr (struct thread_info *thread_info, int fatal)
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thread_db_map_id2thr (struct thread_info *thread_info, int fatal)
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{
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{
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td_err_e err;
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td_err_e err;
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|
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if (thread_info->private->th_valid)
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if (thread_info->private->th_valid)
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return;
|
return;
|
|
|
err = td_ta_map_id2thr_p (thread_agent, GET_THREAD (thread_info->ptid),
|
err = td_ta_map_id2thr_p (thread_agent, GET_THREAD (thread_info->ptid),
|
&thread_info->private->th);
|
&thread_info->private->th);
|
if (err != TD_OK)
|
if (err != TD_OK)
|
{
|
{
|
if (fatal)
|
if (fatal)
|
error (_("Cannot find thread %ld: %s"),
|
error (_("Cannot find thread %ld: %s"),
|
(long) GET_THREAD (thread_info->ptid),
|
(long) GET_THREAD (thread_info->ptid),
|
thread_db_err_str (err));
|
thread_db_err_str (err));
|
}
|
}
|
else
|
else
|
thread_info->private->th_valid = 1;
|
thread_info->private->th_valid = 1;
|
}
|
}
|
|
|
/* Convert between user-level thread ids and LWP ids. */
|
/* Convert between user-level thread ids and LWP ids. */
|
|
|
static ptid_t
|
static ptid_t
|
thread_from_lwp (ptid_t ptid)
|
thread_from_lwp (ptid_t ptid)
|
{
|
{
|
td_thrhandle_t th;
|
td_thrhandle_t th;
|
td_err_e err;
|
td_err_e err;
|
struct thread_info *thread_info;
|
struct thread_info *thread_info;
|
ptid_t thread_ptid;
|
ptid_t thread_ptid;
|
|
|
if (GET_LWP (ptid) == 0)
|
if (GET_LWP (ptid) == 0)
|
ptid = BUILD_LWP (GET_PID (ptid), GET_PID (ptid));
|
ptid = BUILD_LWP (GET_PID (ptid), GET_PID (ptid));
|
|
|
gdb_assert (is_lwp (ptid));
|
gdb_assert (is_lwp (ptid));
|
|
|
err = td_ta_map_lwp2thr_p (thread_agent, GET_LWP (ptid), &th);
|
err = td_ta_map_lwp2thr_p (thread_agent, GET_LWP (ptid), &th);
|
if (err != TD_OK)
|
if (err != TD_OK)
|
error (_("Cannot find user-level thread for LWP %ld: %s"),
|
error (_("Cannot find user-level thread for LWP %ld: %s"),
|
GET_LWP (ptid), thread_db_err_str (err));
|
GET_LWP (ptid), thread_db_err_str (err));
|
|
|
thread_info = NULL;
|
thread_info = NULL;
|
|
|
/* Fetch the thread info. If we get back TD_THR_ZOMBIE, then the
|
/* Fetch the thread info. If we get back TD_THR_ZOMBIE, then the
|
event thread has already died. If another gdb interface has called
|
event thread has already died. If another gdb interface has called
|
thread_alive() previously, the thread won't be found on the thread list
|
thread_alive() previously, the thread won't be found on the thread list
|
anymore. In that case, we don't want to process this ptid anymore
|
anymore. In that case, we don't want to process this ptid anymore
|
to avoid the possibility of later treating it as a newly
|
to avoid the possibility of later treating it as a newly
|
discovered thread id that we should add to the list. Thus,
|
discovered thread id that we should add to the list. Thus,
|
we return a -1 ptid which is also how the thread list marks a
|
we return a -1 ptid which is also how the thread list marks a
|
dead thread. */
|
dead thread. */
|
if (thread_get_info_callback (&th, &thread_info) == TD_THR_ZOMBIE
|
if (thread_get_info_callback (&th, &thread_info) == TD_THR_ZOMBIE
|
&& thread_info == NULL)
|
&& thread_info == NULL)
|
return pid_to_ptid (-1);
|
return pid_to_ptid (-1);
|
|
|
gdb_assert (thread_info && thread_info->private->ti_valid);
|
gdb_assert (thread_info && thread_info->private->ti_valid);
|
|
|
return ptid_build (GET_PID (ptid), GET_LWP (ptid),
|
return ptid_build (GET_PID (ptid), GET_LWP (ptid),
|
thread_info->private->ti.ti_tid);
|
thread_info->private->ti.ti_tid);
|
}
|
}
|
|
|
static ptid_t
|
static ptid_t
|
lwp_from_thread (ptid_t ptid)
|
lwp_from_thread (ptid_t ptid)
|
{
|
{
|
return BUILD_LWP (GET_LWP (ptid), GET_PID (ptid));
|
return BUILD_LWP (GET_LWP (ptid), GET_PID (ptid));
|
}
|
}
|
|
|
|
|
void
|
void
|
thread_db_init (struct target_ops *target)
|
thread_db_init (struct target_ops *target)
|
{
|
{
|
target_beneath = target;
|
target_beneath = target;
|
}
|
}
|
|
|
static void *
|
static void *
|
verbose_dlsym (void *handle, const char *name)
|
verbose_dlsym (void *handle, const char *name)
|
{
|
{
|
void *sym = dlsym (handle, name);
|
void *sym = dlsym (handle, name);
|
if (sym == NULL)
|
if (sym == NULL)
|
warning (_("Symbol \"%s\" not found in libthread_db: %s"), name, dlerror ());
|
warning (_("Symbol \"%s\" not found in libthread_db: %s"), name, dlerror ());
|
return sym;
|
return sym;
|
}
|
}
|
|
|
static int
|
static int
|
thread_db_load (void)
|
thread_db_load (void)
|
{
|
{
|
void *handle;
|
void *handle;
|
td_err_e err;
|
td_err_e err;
|
|
|
handle = dlopen (LIBTHREAD_DB_SO, RTLD_NOW);
|
handle = dlopen (LIBTHREAD_DB_SO, RTLD_NOW);
|
if (handle == NULL)
|
if (handle == NULL)
|
{
|
{
|
fprintf_filtered (gdb_stderr, "\n\ndlopen failed on '%s' - %s\n",
|
fprintf_filtered (gdb_stderr, "\n\ndlopen failed on '%s' - %s\n",
|
LIBTHREAD_DB_SO, dlerror ());
|
LIBTHREAD_DB_SO, dlerror ());
|
fprintf_filtered (gdb_stderr,
|
fprintf_filtered (gdb_stderr,
|
"GDB will not be able to debug pthreads.\n\n");
|
"GDB will not be able to debug pthreads.\n\n");
|
return 0;
|
return 0;
|
}
|
}
|
|
|
/* Initialize pointers to the dynamic library functions we will use.
|
/* Initialize pointers to the dynamic library functions we will use.
|
Essential functions first. */
|
Essential functions first. */
|
|
|
td_init_p = verbose_dlsym (handle, "td_init");
|
td_init_p = verbose_dlsym (handle, "td_init");
|
if (td_init_p == NULL)
|
if (td_init_p == NULL)
|
return 0;
|
return 0;
|
|
|
td_ta_new_p = verbose_dlsym (handle, "td_ta_new");
|
td_ta_new_p = verbose_dlsym (handle, "td_ta_new");
|
if (td_ta_new_p == NULL)
|
if (td_ta_new_p == NULL)
|
return 0;
|
return 0;
|
|
|
td_ta_map_id2thr_p = verbose_dlsym (handle, "td_ta_map_id2thr");
|
td_ta_map_id2thr_p = verbose_dlsym (handle, "td_ta_map_id2thr");
|
if (td_ta_map_id2thr_p == NULL)
|
if (td_ta_map_id2thr_p == NULL)
|
return 0;
|
return 0;
|
|
|
td_ta_map_lwp2thr_p = verbose_dlsym (handle, "td_ta_map_lwp2thr");
|
td_ta_map_lwp2thr_p = verbose_dlsym (handle, "td_ta_map_lwp2thr");
|
if (td_ta_map_lwp2thr_p == NULL)
|
if (td_ta_map_lwp2thr_p == NULL)
|
return 0;
|
return 0;
|
|
|
td_ta_thr_iter_p = verbose_dlsym (handle, "td_ta_thr_iter");
|
td_ta_thr_iter_p = verbose_dlsym (handle, "td_ta_thr_iter");
|
if (td_ta_thr_iter_p == NULL)
|
if (td_ta_thr_iter_p == NULL)
|
return 0;
|
return 0;
|
|
|
td_thr_validate_p = verbose_dlsym (handle, "td_thr_validate");
|
td_thr_validate_p = verbose_dlsym (handle, "td_thr_validate");
|
if (td_thr_validate_p == NULL)
|
if (td_thr_validate_p == NULL)
|
return 0;
|
return 0;
|
|
|
td_thr_get_info_p = verbose_dlsym (handle, "td_thr_get_info");
|
td_thr_get_info_p = verbose_dlsym (handle, "td_thr_get_info");
|
if (td_thr_get_info_p == NULL)
|
if (td_thr_get_info_p == NULL)
|
return 0;
|
return 0;
|
|
|
/* Initialize the library. */
|
/* Initialize the library. */
|
err = td_init_p ();
|
err = td_init_p ();
|
if (err != TD_OK)
|
if (err != TD_OK)
|
{
|
{
|
warning (_("Cannot initialize libthread_db: %s"), thread_db_err_str (err));
|
warning (_("Cannot initialize libthread_db: %s"), thread_db_err_str (err));
|
return 0;
|
return 0;
|
}
|
}
|
|
|
/* These are not essential. */
|
/* These are not essential. */
|
td_ta_event_addr_p = dlsym (handle, "td_ta_event_addr");
|
td_ta_event_addr_p = dlsym (handle, "td_ta_event_addr");
|
td_ta_set_event_p = dlsym (handle, "td_ta_set_event");
|
td_ta_set_event_p = dlsym (handle, "td_ta_set_event");
|
td_ta_event_getmsg_p = dlsym (handle, "td_ta_event_getmsg");
|
td_ta_event_getmsg_p = dlsym (handle, "td_ta_event_getmsg");
|
td_thr_event_enable_p = dlsym (handle, "td_thr_event_enable");
|
td_thr_event_enable_p = dlsym (handle, "td_thr_event_enable");
|
td_thr_tls_get_addr_p = dlsym (handle, "td_thr_tls_get_addr");
|
td_thr_tls_get_addr_p = dlsym (handle, "td_thr_tls_get_addr");
|
|
|
return 1;
|
return 1;
|
}
|
}
|
|
|
static td_err_e
|
static td_err_e
|
enable_thread_event (td_thragent_t *thread_agent, int event, CORE_ADDR *bp)
|
enable_thread_event (td_thragent_t *thread_agent, int event, CORE_ADDR *bp)
|
{
|
{
|
td_notify_t notify;
|
td_notify_t notify;
|
td_err_e err;
|
td_err_e err;
|
|
|
/* Get the breakpoint address for thread EVENT. */
|
/* Get the breakpoint address for thread EVENT. */
|
err = td_ta_event_addr_p (thread_agent, event, ¬ify);
|
err = td_ta_event_addr_p (thread_agent, event, ¬ify);
|
if (err != TD_OK)
|
if (err != TD_OK)
|
return err;
|
return err;
|
|
|
/* Set up the breakpoint. */
|
/* Set up the breakpoint. */
|
gdb_assert (exec_bfd);
|
gdb_assert (exec_bfd);
|
(*bp) = (gdbarch_convert_from_func_ptr_addr
|
(*bp) = (gdbarch_convert_from_func_ptr_addr
|
(current_gdbarch,
|
(current_gdbarch,
|
/* Do proper sign extension for the target. */
|
/* Do proper sign extension for the target. */
|
(bfd_get_sign_extend_vma (exec_bfd) > 0
|
(bfd_get_sign_extend_vma (exec_bfd) > 0
|
? (CORE_ADDR) (intptr_t) notify.u.bptaddr
|
? (CORE_ADDR) (intptr_t) notify.u.bptaddr
|
: (CORE_ADDR) (uintptr_t) notify.u.bptaddr),
|
: (CORE_ADDR) (uintptr_t) notify.u.bptaddr),
|
¤t_target));
|
¤t_target));
|
create_thread_event_breakpoint ((*bp));
|
create_thread_event_breakpoint ((*bp));
|
|
|
return TD_OK;
|
return TD_OK;
|
}
|
}
|
|
|
static void
|
static void
|
enable_thread_event_reporting (void)
|
enable_thread_event_reporting (void)
|
{
|
{
|
td_thr_events_t events;
|
td_thr_events_t events;
|
td_notify_t notify;
|
td_notify_t notify;
|
td_err_e err;
|
td_err_e err;
|
#ifdef HAVE_GNU_LIBC_VERSION_H
|
#ifdef HAVE_GNU_LIBC_VERSION_H
|
const char *libc_version;
|
const char *libc_version;
|
int libc_major, libc_minor;
|
int libc_major, libc_minor;
|
#endif
|
#endif
|
|
|
/* We cannot use the thread event reporting facility if these
|
/* We cannot use the thread event reporting facility if these
|
functions aren't available. */
|
functions aren't available. */
|
if (td_ta_event_addr_p == NULL || td_ta_set_event_p == NULL
|
if (td_ta_event_addr_p == NULL || td_ta_set_event_p == NULL
|
|| td_ta_event_getmsg_p == NULL || td_thr_event_enable_p == NULL)
|
|| td_ta_event_getmsg_p == NULL || td_thr_event_enable_p == NULL)
|
return;
|
return;
|
|
|
/* Set the process wide mask saying which events we're interested in. */
|
/* Set the process wide mask saying which events we're interested in. */
|
td_event_emptyset (&events);
|
td_event_emptyset (&events);
|
td_event_addset (&events, TD_CREATE);
|
td_event_addset (&events, TD_CREATE);
|
|
|
#ifdef HAVE_GNU_LIBC_VERSION_H
|
#ifdef HAVE_GNU_LIBC_VERSION_H
|
/* The event reporting facility is broken for TD_DEATH events in
|
/* The event reporting facility is broken for TD_DEATH events in
|
glibc 2.1.3, so don't enable it if we have glibc but a lower
|
glibc 2.1.3, so don't enable it if we have glibc but a lower
|
version. */
|
version. */
|
libc_version = gnu_get_libc_version ();
|
libc_version = gnu_get_libc_version ();
|
if (sscanf (libc_version, "%d.%d", &libc_major, &libc_minor) == 2
|
if (sscanf (libc_version, "%d.%d", &libc_major, &libc_minor) == 2
|
&& (libc_major > 2 || (libc_major == 2 && libc_minor > 1)))
|
&& (libc_major > 2 || (libc_major == 2 && libc_minor > 1)))
|
#endif
|
#endif
|
td_event_addset (&events, TD_DEATH);
|
td_event_addset (&events, TD_DEATH);
|
|
|
err = td_ta_set_event_p (thread_agent, &events);
|
err = td_ta_set_event_p (thread_agent, &events);
|
if (err != TD_OK)
|
if (err != TD_OK)
|
{
|
{
|
warning (_("Unable to set global thread event mask: %s"),
|
warning (_("Unable to set global thread event mask: %s"),
|
thread_db_err_str (err));
|
thread_db_err_str (err));
|
return;
|
return;
|
}
|
}
|
|
|
/* Delete previous thread event breakpoints, if any. */
|
/* Delete previous thread event breakpoints, if any. */
|
remove_thread_event_breakpoints ();
|
remove_thread_event_breakpoints ();
|
td_create_bp_addr = 0;
|
td_create_bp_addr = 0;
|
td_death_bp_addr = 0;
|
td_death_bp_addr = 0;
|
|
|
/* Set up the thread creation event. */
|
/* Set up the thread creation event. */
|
err = enable_thread_event (thread_agent, TD_CREATE, &td_create_bp_addr);
|
err = enable_thread_event (thread_agent, TD_CREATE, &td_create_bp_addr);
|
if (err != TD_OK)
|
if (err != TD_OK)
|
{
|
{
|
warning (_("Unable to get location for thread creation breakpoint: %s"),
|
warning (_("Unable to get location for thread creation breakpoint: %s"),
|
thread_db_err_str (err));
|
thread_db_err_str (err));
|
return;
|
return;
|
}
|
}
|
|
|
/* Set up the thread death event. */
|
/* Set up the thread death event. */
|
err = enable_thread_event (thread_agent, TD_DEATH, &td_death_bp_addr);
|
err = enable_thread_event (thread_agent, TD_DEATH, &td_death_bp_addr);
|
if (err != TD_OK)
|
if (err != TD_OK)
|
{
|
{
|
warning (_("Unable to get location for thread death breakpoint: %s"),
|
warning (_("Unable to get location for thread death breakpoint: %s"),
|
thread_db_err_str (err));
|
thread_db_err_str (err));
|
return;
|
return;
|
}
|
}
|
}
|
}
|
|
|
static void
|
static void
|
disable_thread_event_reporting (void)
|
disable_thread_event_reporting (void)
|
{
|
{
|
td_thr_events_t events;
|
td_thr_events_t events;
|
|
|
/* Set the process wide mask saying we aren't interested in any
|
/* Set the process wide mask saying we aren't interested in any
|
events anymore. */
|
events anymore. */
|
td_event_emptyset (&events);
|
td_event_emptyset (&events);
|
td_ta_set_event_p (thread_agent, &events);
|
td_ta_set_event_p (thread_agent, &events);
|
|
|
/* Delete thread event breakpoints, if any. */
|
/* Delete thread event breakpoints, if any. */
|
remove_thread_event_breakpoints ();
|
remove_thread_event_breakpoints ();
|
td_create_bp_addr = 0;
|
td_create_bp_addr = 0;
|
td_death_bp_addr = 0;
|
td_death_bp_addr = 0;
|
}
|
}
|
|
|
static void
|
static void
|
check_thread_signals (void)
|
check_thread_signals (void)
|
{
|
{
|
#ifdef GET_THREAD_SIGNALS
|
#ifdef GET_THREAD_SIGNALS
|
if (!thread_signals)
|
if (!thread_signals)
|
{
|
{
|
sigset_t mask;
|
sigset_t mask;
|
int i;
|
int i;
|
|
|
GET_THREAD_SIGNALS (&mask);
|
GET_THREAD_SIGNALS (&mask);
|
sigemptyset (&thread_stop_set);
|
sigemptyset (&thread_stop_set);
|
sigemptyset (&thread_print_set);
|
sigemptyset (&thread_print_set);
|
|
|
for (i = 1; i < NSIG; i++)
|
for (i = 1; i < NSIG; i++)
|
{
|
{
|
if (sigismember (&mask, i))
|
if (sigismember (&mask, i))
|
{
|
{
|
if (signal_stop_update (target_signal_from_host (i), 0))
|
if (signal_stop_update (target_signal_from_host (i), 0))
|
sigaddset (&thread_stop_set, i);
|
sigaddset (&thread_stop_set, i);
|
if (signal_print_update (target_signal_from_host (i), 0))
|
if (signal_print_update (target_signal_from_host (i), 0))
|
sigaddset (&thread_print_set, i);
|
sigaddset (&thread_print_set, i);
|
thread_signals = 1;
|
thread_signals = 1;
|
}
|
}
|
}
|
}
|
}
|
}
|
#endif
|
#endif
|
}
|
}
|
|
|
/* Check whether thread_db is usable. This function is called when
|
/* Check whether thread_db is usable. This function is called when
|
an inferior is created (or otherwise acquired, e.g. attached to)
|
an inferior is created (or otherwise acquired, e.g. attached to)
|
and when new shared libraries are loaded into a running process. */
|
and when new shared libraries are loaded into a running process. */
|
|
|
void
|
void
|
check_for_thread_db (void)
|
check_for_thread_db (void)
|
{
|
{
|
td_err_e err;
|
td_err_e err;
|
static int already_loaded;
|
static int already_loaded;
|
|
|
/* Do nothing if we couldn't load libthread_db.so.1. */
|
/* Do nothing if we couldn't load libthread_db.so.1. */
|
if (td_ta_new_p == NULL)
|
if (td_ta_new_p == NULL)
|
return;
|
return;
|
|
|
/* First time through, report that libthread_db was successfuly
|
/* First time through, report that libthread_db was successfuly
|
loaded. Can't print this in in thread_db_load as, at that stage,
|
loaded. Can't print this in in thread_db_load as, at that stage,
|
the interpreter and it's console haven't started. */
|
the interpreter and it's console haven't started. */
|
|
|
if (!already_loaded)
|
if (!already_loaded)
|
{
|
{
|
Dl_info info;
|
Dl_info info;
|
const char *library = NULL;
|
const char *library = NULL;
|
if (dladdr ((*td_ta_new_p), &info) != 0)
|
if (dladdr ((*td_ta_new_p), &info) != 0)
|
library = info.dli_fname;
|
library = info.dli_fname;
|
|
|
/* Try dlinfo? */
|
/* Try dlinfo? */
|
|
|
if (library == NULL)
|
if (library == NULL)
|
/* Paranoid - don't let a NULL path slip through. */
|
/* Paranoid - don't let a NULL path slip through. */
|
library = LIBTHREAD_DB_SO;
|
library = LIBTHREAD_DB_SO;
|
|
|
if (info_verbose)
|
if (info_verbose)
|
printf_unfiltered (_("Using host libthread_db library \"%s\".\n"),
|
printf_unfiltered (_("Using host libthread_db library \"%s\".\n"),
|
library);
|
library);
|
already_loaded = 1;
|
already_loaded = 1;
|
}
|
}
|
|
|
if (using_thread_db)
|
if (using_thread_db)
|
/* Nothing to do. The thread library was already detected and the
|
/* Nothing to do. The thread library was already detected and the
|
target vector was already activated. */
|
target vector was already activated. */
|
return;
|
return;
|
|
|
/* Don't attempt to use thread_db on targets which can not run
|
/* Don't attempt to use thread_db on targets which can not run
|
(executables not running yet, core files) for now. */
|
(executables not running yet, core files) for now. */
|
if (!target_has_execution)
|
if (!target_has_execution)
|
return;
|
return;
|
|
|
/* Don't attempt to use thread_db for remote targets. */
|
/* Don't attempt to use thread_db for remote targets. */
|
if (!target_can_run (¤t_target))
|
if (!target_can_run (¤t_target))
|
return;
|
return;
|
|
|
/* Initialize the structure that identifies the child process. */
|
/* Initialize the structure that identifies the child process. */
|
proc_handle.pid = GET_PID (inferior_ptid);
|
proc_handle.pid = GET_PID (inferior_ptid);
|
|
|
/* Now attempt to open a connection to the thread library. */
|
/* Now attempt to open a connection to the thread library. */
|
err = td_ta_new_p (&proc_handle, &thread_agent);
|
err = td_ta_new_p (&proc_handle, &thread_agent);
|
switch (err)
|
switch (err)
|
{
|
{
|
case TD_NOLIBTHREAD:
|
case TD_NOLIBTHREAD:
|
/* No thread library was detected. */
|
/* No thread library was detected. */
|
break;
|
break;
|
|
|
case TD_OK:
|
case TD_OK:
|
printf_unfiltered (_("[Thread debugging using libthread_db enabled]\n"));
|
printf_unfiltered (_("[Thread debugging using libthread_db enabled]\n"));
|
|
|
/* The thread library was detected. Activate the thread_db target. */
|
/* The thread library was detected. Activate the thread_db target. */
|
push_target (&thread_db_ops);
|
push_target (&thread_db_ops);
|
using_thread_db = 1;
|
using_thread_db = 1;
|
|
|
enable_thread_event_reporting ();
|
enable_thread_event_reporting ();
|
thread_db_find_new_threads ();
|
thread_db_find_new_threads ();
|
break;
|
break;
|
|
|
default:
|
default:
|
warning (_("Cannot initialize thread debugging library: %s"),
|
warning (_("Cannot initialize thread debugging library: %s"),
|
thread_db_err_str (err));
|
thread_db_err_str (err));
|
break;
|
break;
|
}
|
}
|
}
|
}
|
|
|
static void
|
static void
|
thread_db_new_objfile (struct objfile *objfile)
|
thread_db_new_objfile (struct objfile *objfile)
|
{
|
{
|
if (objfile != NULL)
|
if (objfile != NULL)
|
check_for_thread_db ();
|
check_for_thread_db ();
|
}
|
}
|
|
|
/* Attach to a new thread. This function is called when we receive a
|
/* Attach to a new thread. This function is called when we receive a
|
TD_CREATE event or when we iterate over all threads and find one
|
TD_CREATE event or when we iterate over all threads and find one
|
that wasn't already in our list. */
|
that wasn't already in our list. */
|
|
|
static void
|
static void
|
attach_thread (ptid_t ptid, const td_thrhandle_t *th_p,
|
attach_thread (ptid_t ptid, const td_thrhandle_t *th_p,
|
const td_thrinfo_t *ti_p)
|
const td_thrinfo_t *ti_p)
|
{
|
{
|
struct thread_info *tp;
|
struct thread_info *tp;
|
td_err_e err;
|
td_err_e err;
|
|
|
/* If we're being called after a TD_CREATE event, we may already
|
/* If we're being called after a TD_CREATE event, we may already
|
know about this thread. There are two ways this can happen. We
|
know about this thread. There are two ways this can happen. We
|
may have iterated over all threads between the thread creation
|
may have iterated over all threads between the thread creation
|
and the TD_CREATE event, for instance when the user has issued
|
and the TD_CREATE event, for instance when the user has issued
|
the `info threads' command before the SIGTRAP for hitting the
|
the `info threads' command before the SIGTRAP for hitting the
|
thread creation breakpoint was reported. Alternatively, the
|
thread creation breakpoint was reported. Alternatively, the
|
thread may have exited and a new one been created with the same
|
thread may have exited and a new one been created with the same
|
thread ID. In the first case we don't need to do anything; in
|
thread ID. In the first case we don't need to do anything; in
|
the second case we should discard information about the dead
|
the second case we should discard information about the dead
|
thread and attach to the new one. */
|
thread and attach to the new one. */
|
if (in_thread_list (ptid))
|
if (in_thread_list (ptid))
|
{
|
{
|
tp = find_thread_pid (ptid);
|
tp = find_thread_pid (ptid);
|
gdb_assert (tp != NULL);
|
gdb_assert (tp != NULL);
|
|
|
if (!tp->private->dying)
|
if (!tp->private->dying)
|
return;
|
return;
|
|
|
delete_thread (ptid);
|
delete_thread (ptid);
|
}
|
}
|
|
|
check_thread_signals ();
|
check_thread_signals ();
|
|
|
if (ti_p->ti_state == TD_THR_UNKNOWN || ti_p->ti_state == TD_THR_ZOMBIE)
|
if (ti_p->ti_state == TD_THR_UNKNOWN || ti_p->ti_state == TD_THR_ZOMBIE)
|
return; /* A zombie thread -- do not attach. */
|
return; /* A zombie thread -- do not attach. */
|
|
|
/* Under GNU/Linux, we have to attach to each and every thread. */
|
/* Under GNU/Linux, we have to attach to each and every thread. */
|
if (lin_lwp_attach_lwp (BUILD_LWP (ti_p->ti_lid, GET_PID (ptid))) < 0)
|
if (lin_lwp_attach_lwp (BUILD_LWP (ti_p->ti_lid, GET_PID (ptid))) < 0)
|
return;
|
return;
|
|
|
/* Add the thread to GDB's thread list. */
|
/* Add the thread to GDB's thread list. */
|
tp = add_thread (ptid);
|
tp = add_thread (ptid);
|
tp->private = xmalloc (sizeof (struct private_thread_info));
|
tp->private = xmalloc (sizeof (struct private_thread_info));
|
memset (tp->private, 0, sizeof (struct private_thread_info));
|
memset (tp->private, 0, sizeof (struct private_thread_info));
|
|
|
/* Enable thread event reporting for this thread. */
|
/* Enable thread event reporting for this thread. */
|
err = td_thr_event_enable_p (th_p, 1);
|
err = td_thr_event_enable_p (th_p, 1);
|
if (err != TD_OK)
|
if (err != TD_OK)
|
error (_("Cannot enable thread event reporting for %s: %s"),
|
error (_("Cannot enable thread event reporting for %s: %s"),
|
target_pid_to_str (ptid), thread_db_err_str (err));
|
target_pid_to_str (ptid), thread_db_err_str (err));
|
}
|
}
|
|
|
static void
|
static void
|
detach_thread (ptid_t ptid, int verbose)
|
detach_thread (ptid_t ptid, int verbose)
|
{
|
{
|
struct thread_info *thread_info;
|
struct thread_info *thread_info;
|
|
|
if (verbose)
|
if (verbose)
|
printf_unfiltered (_("[%s exited]\n"), target_pid_to_str (ptid));
|
printf_unfiltered (_("[%s exited]\n"), target_pid_to_str (ptid));
|
|
|
/* Don't delete the thread now, because it still reports as active
|
/* Don't delete the thread now, because it still reports as active
|
until it has executed a few instructions after the event
|
until it has executed a few instructions after the event
|
breakpoint - if we deleted it now, "info threads" would cause us
|
breakpoint - if we deleted it now, "info threads" would cause us
|
to re-attach to it. Just mark it as having had a TD_DEATH
|
to re-attach to it. Just mark it as having had a TD_DEATH
|
event. This means that we won't delete it from our thread list
|
event. This means that we won't delete it from our thread list
|
until we notice that it's dead (via prune_threads), or until
|
until we notice that it's dead (via prune_threads), or until
|
something re-uses its thread ID. */
|
something re-uses its thread ID. */
|
thread_info = find_thread_pid (ptid);
|
thread_info = find_thread_pid (ptid);
|
gdb_assert (thread_info != NULL);
|
gdb_assert (thread_info != NULL);
|
thread_info->private->dying = 1;
|
thread_info->private->dying = 1;
|
}
|
}
|
|
|
static void
|
static void
|
thread_db_detach (char *args, int from_tty)
|
thread_db_detach (char *args, int from_tty)
|
{
|
{
|
disable_thread_event_reporting ();
|
disable_thread_event_reporting ();
|
|
|
/* There's no need to save & restore inferior_ptid here, since the
|
/* There's no need to save & restore inferior_ptid here, since the
|
inferior is not supposed to survive this function call. */
|
inferior is not supposed to survive this function call. */
|
inferior_ptid = lwp_from_thread (inferior_ptid);
|
inferior_ptid = lwp_from_thread (inferior_ptid);
|
|
|
target_beneath->to_detach (args, from_tty);
|
target_beneath->to_detach (args, from_tty);
|
|
|
/* Should this be done by detach_command? */
|
/* Should this be done by detach_command? */
|
target_mourn_inferior ();
|
target_mourn_inferior ();
|
}
|
}
|
|
|
static int
|
static int
|
clear_lwpid_callback (struct thread_info *thread, void *dummy)
|
clear_lwpid_callback (struct thread_info *thread, void *dummy)
|
{
|
{
|
/* If we know that our thread implementation is 1-to-1, we could save
|
/* If we know that our thread implementation is 1-to-1, we could save
|
a certain amount of information; it's not clear how much, so we
|
a certain amount of information; it's not clear how much, so we
|
are always conservative. */
|
are always conservative. */
|
|
|
thread->private->th_valid = 0;
|
thread->private->th_valid = 0;
|
thread->private->ti_valid = 0;
|
thread->private->ti_valid = 0;
|
|
|
return 0;
|
return 0;
|
}
|
}
|
|
|
static void
|
static void
|
thread_db_resume (ptid_t ptid, int step, enum target_signal signo)
|
thread_db_resume (ptid_t ptid, int step, enum target_signal signo)
|
{
|
{
|
struct cleanup *old_chain = save_inferior_ptid ();
|
struct cleanup *old_chain = save_inferior_ptid ();
|
|
|
if (GET_PID (ptid) == -1)
|
if (GET_PID (ptid) == -1)
|
inferior_ptid = lwp_from_thread (inferior_ptid);
|
inferior_ptid = lwp_from_thread (inferior_ptid);
|
else if (is_thread (ptid))
|
else if (is_thread (ptid))
|
ptid = lwp_from_thread (ptid);
|
ptid = lwp_from_thread (ptid);
|
|
|
/* Clear cached data which may not be valid after the resume. */
|
/* Clear cached data which may not be valid after the resume. */
|
iterate_over_threads (clear_lwpid_callback, NULL);
|
iterate_over_threads (clear_lwpid_callback, NULL);
|
|
|
target_beneath->to_resume (ptid, step, signo);
|
target_beneath->to_resume (ptid, step, signo);
|
|
|
do_cleanups (old_chain);
|
do_cleanups (old_chain);
|
}
|
}
|
|
|
/* Check if PID is currently stopped at the location of a thread event
|
/* Check if PID is currently stopped at the location of a thread event
|
breakpoint location. If it is, read the event message and act upon
|
breakpoint location. If it is, read the event message and act upon
|
the event. */
|
the event. */
|
|
|
static void
|
static void
|
check_event (ptid_t ptid)
|
check_event (ptid_t ptid)
|
{
|
{
|
td_event_msg_t msg;
|
td_event_msg_t msg;
|
td_thrinfo_t ti;
|
td_thrinfo_t ti;
|
td_err_e err;
|
td_err_e err;
|
CORE_ADDR stop_pc;
|
CORE_ADDR stop_pc;
|
int loop = 0;
|
int loop = 0;
|
|
|
/* Bail out early if we're not at a thread event breakpoint. */
|
/* Bail out early if we're not at a thread event breakpoint. */
|
stop_pc = read_pc_pid (ptid) - gdbarch_decr_pc_after_break (current_gdbarch);
|
stop_pc = read_pc_pid (ptid) - gdbarch_decr_pc_after_break (current_gdbarch);
|
if (stop_pc != td_create_bp_addr && stop_pc != td_death_bp_addr)
|
if (stop_pc != td_create_bp_addr && stop_pc != td_death_bp_addr)
|
return;
|
return;
|
|
|
/* If we are at a create breakpoint, we do not know what new lwp
|
/* If we are at a create breakpoint, we do not know what new lwp
|
was created and cannot specifically locate the event message for it.
|
was created and cannot specifically locate the event message for it.
|
We have to call td_ta_event_getmsg() to get
|
We have to call td_ta_event_getmsg() to get
|
the latest message. Since we have no way of correlating whether
|
the latest message. Since we have no way of correlating whether
|
the event message we get back corresponds to our breakpoint, we must
|
the event message we get back corresponds to our breakpoint, we must
|
loop and read all event messages, processing them appropriately.
|
loop and read all event messages, processing them appropriately.
|
This guarantees we will process the correct message before continuing
|
This guarantees we will process the correct message before continuing
|
from the breakpoint.
|
from the breakpoint.
|
|
|
Currently, death events are not enabled. If they are enabled,
|
Currently, death events are not enabled. If they are enabled,
|
the death event can use the td_thr_event_getmsg() interface to
|
the death event can use the td_thr_event_getmsg() interface to
|
get the message specifically for that lwp and avoid looping
|
get the message specifically for that lwp and avoid looping
|
below. */
|
below. */
|
|
|
loop = 1;
|
loop = 1;
|
|
|
do
|
do
|
{
|
{
|
err = td_ta_event_getmsg_p (thread_agent, &msg);
|
err = td_ta_event_getmsg_p (thread_agent, &msg);
|
if (err != TD_OK)
|
if (err != TD_OK)
|
{
|
{
|
if (err == TD_NOMSG)
|
if (err == TD_NOMSG)
|
return;
|
return;
|
|
|
error (_("Cannot get thread event message: %s"),
|
error (_("Cannot get thread event message: %s"),
|
thread_db_err_str (err));
|
thread_db_err_str (err));
|
}
|
}
|
|
|
err = td_thr_get_info_p (msg.th_p, &ti);
|
err = td_thr_get_info_p (msg.th_p, &ti);
|
if (err != TD_OK)
|
if (err != TD_OK)
|
error (_("Cannot get thread info: %s"), thread_db_err_str (err));
|
error (_("Cannot get thread info: %s"), thread_db_err_str (err));
|
|
|
ptid = ptid_build (GET_PID (ptid), ti.ti_lid, ti.ti_tid);
|
ptid = ptid_build (GET_PID (ptid), ti.ti_lid, ti.ti_tid);
|
|
|
switch (msg.event)
|
switch (msg.event)
|
{
|
{
|
case TD_CREATE:
|
case TD_CREATE:
|
/* Call attach_thread whether or not we already know about a
|
/* Call attach_thread whether or not we already know about a
|
thread with this thread ID. */
|
thread with this thread ID. */
|
attach_thread (ptid, msg.th_p, &ti);
|
attach_thread (ptid, msg.th_p, &ti);
|
|
|
break;
|
break;
|
|
|
case TD_DEATH:
|
case TD_DEATH:
|
|
|
if (!in_thread_list (ptid))
|
if (!in_thread_list (ptid))
|
error (_("Spurious thread death event."));
|
error (_("Spurious thread death event."));
|
|
|
detach_thread (ptid, print_thread_events);
|
detach_thread (ptid, print_thread_events);
|
|
|
break;
|
break;
|
|
|
default:
|
default:
|
error (_("Spurious thread event."));
|
error (_("Spurious thread event."));
|
}
|
}
|
}
|
}
|
while (loop);
|
while (loop);
|
}
|
}
|
|
|
static ptid_t
|
static ptid_t
|
thread_db_wait (ptid_t ptid, struct target_waitstatus *ourstatus)
|
thread_db_wait (ptid_t ptid, struct target_waitstatus *ourstatus)
|
{
|
{
|
extern ptid_t trap_ptid;
|
extern ptid_t trap_ptid;
|
|
|
if (GET_PID (ptid) != -1 && is_thread (ptid))
|
if (GET_PID (ptid) != -1 && is_thread (ptid))
|
ptid = lwp_from_thread (ptid);
|
ptid = lwp_from_thread (ptid);
|
|
|
ptid = target_beneath->to_wait (ptid, ourstatus);
|
ptid = target_beneath->to_wait (ptid, ourstatus);
|
|
|
if (ourstatus->kind == TARGET_WAITKIND_EXITED
|
if (ourstatus->kind == TARGET_WAITKIND_EXITED
|
|| ourstatus->kind == TARGET_WAITKIND_SIGNALLED)
|
|| ourstatus->kind == TARGET_WAITKIND_SIGNALLED)
|
return pid_to_ptid (-1);
|
return pid_to_ptid (-1);
|
|
|
if (ourstatus->kind == TARGET_WAITKIND_EXECD)
|
if (ourstatus->kind == TARGET_WAITKIND_EXECD)
|
{
|
{
|
remove_thread_event_breakpoints ();
|
remove_thread_event_breakpoints ();
|
unpush_target (&thread_db_ops);
|
unpush_target (&thread_db_ops);
|
using_thread_db = 0;
|
using_thread_db = 0;
|
|
|
return pid_to_ptid (GET_PID (ptid));
|
return pid_to_ptid (GET_PID (ptid));
|
}
|
}
|
|
|
/* If we do not know about the main thread yet, this would be a good time to
|
/* If we do not know about the main thread yet, this would be a good time to
|
find it. */
|
find it. */
|
if (ourstatus->kind == TARGET_WAITKIND_STOPPED && !have_threads ())
|
if (ourstatus->kind == TARGET_WAITKIND_STOPPED && !have_threads ())
|
thread_db_find_new_threads ();
|
thread_db_find_new_threads ();
|
|
|
if (ourstatus->kind == TARGET_WAITKIND_STOPPED
|
if (ourstatus->kind == TARGET_WAITKIND_STOPPED
|
&& ourstatus->value.sig == TARGET_SIGNAL_TRAP)
|
&& ourstatus->value.sig == TARGET_SIGNAL_TRAP)
|
/* Check for a thread event. */
|
/* Check for a thread event. */
|
check_event (ptid);
|
check_event (ptid);
|
|
|
if (have_threads ())
|
if (have_threads ())
|
{
|
{
|
/* Change ptids back into the higher level PID + TID format. If
|
/* Change ptids back into the higher level PID + TID format. If
|
the thread is dead and no longer on the thread list, we will
|
the thread is dead and no longer on the thread list, we will
|
get back a dead ptid. This can occur if the thread death
|
get back a dead ptid. This can occur if the thread death
|
event gets postponed by other simultaneous events. In such a
|
event gets postponed by other simultaneous events. In such a
|
case, we want to just ignore the event and continue on. */
|
case, we want to just ignore the event and continue on. */
|
|
|
if (!ptid_equal (trap_ptid, null_ptid))
|
if (!ptid_equal (trap_ptid, null_ptid))
|
trap_ptid = thread_from_lwp (trap_ptid);
|
trap_ptid = thread_from_lwp (trap_ptid);
|
|
|
ptid = thread_from_lwp (ptid);
|
ptid = thread_from_lwp (ptid);
|
if (GET_PID (ptid) == -1)
|
if (GET_PID (ptid) == -1)
|
ourstatus->kind = TARGET_WAITKIND_SPURIOUS;
|
ourstatus->kind = TARGET_WAITKIND_SPURIOUS;
|
}
|
}
|
|
|
return ptid;
|
return ptid;
|
}
|
}
|
|
|
static void
|
static void
|
thread_db_kill (void)
|
thread_db_kill (void)
|
{
|
{
|
/* There's no need to save & restore inferior_ptid here, since the
|
/* There's no need to save & restore inferior_ptid here, since the
|
inferior isn't supposed to survive this function call. */
|
inferior isn't supposed to survive this function call. */
|
inferior_ptid = lwp_from_thread (inferior_ptid);
|
inferior_ptid = lwp_from_thread (inferior_ptid);
|
target_beneath->to_kill ();
|
target_beneath->to_kill ();
|
}
|
}
|
|
|
static void
|
static void
|
thread_db_mourn_inferior (void)
|
thread_db_mourn_inferior (void)
|
{
|
{
|
/* Forget about the child's process ID. We shouldn't need it
|
/* Forget about the child's process ID. We shouldn't need it
|
anymore. */
|
anymore. */
|
proc_handle.pid = 0;
|
proc_handle.pid = 0;
|
|
|
target_beneath->to_mourn_inferior ();
|
target_beneath->to_mourn_inferior ();
|
|
|
/* Delete the old thread event breakpoints. Do this after mourning
|
/* Delete the old thread event breakpoints. Do this after mourning
|
the inferior, so that we don't try to uninsert them. */
|
the inferior, so that we don't try to uninsert them. */
|
remove_thread_event_breakpoints ();
|
remove_thread_event_breakpoints ();
|
|
|
/* Detach thread_db target ops. */
|
/* Detach thread_db target ops. */
|
unpush_target (&thread_db_ops);
|
unpush_target (&thread_db_ops);
|
using_thread_db = 0;
|
using_thread_db = 0;
|
}
|
}
|
|
|
static int
|
static int
|
find_new_threads_callback (const td_thrhandle_t *th_p, void *data)
|
find_new_threads_callback (const td_thrhandle_t *th_p, void *data)
|
{
|
{
|
td_thrinfo_t ti;
|
td_thrinfo_t ti;
|
td_err_e err;
|
td_err_e err;
|
ptid_t ptid;
|
ptid_t ptid;
|
|
|
err = td_thr_get_info_p (th_p, &ti);
|
err = td_thr_get_info_p (th_p, &ti);
|
if (err != TD_OK)
|
if (err != TD_OK)
|
error (_("find_new_threads_callback: cannot get thread info: %s"),
|
error (_("find_new_threads_callback: cannot get thread info: %s"),
|
thread_db_err_str (err));
|
thread_db_err_str (err));
|
|
|
if (ti.ti_state == TD_THR_UNKNOWN || ti.ti_state == TD_THR_ZOMBIE)
|
if (ti.ti_state == TD_THR_UNKNOWN || ti.ti_state == TD_THR_ZOMBIE)
|
return 0; /* A zombie -- ignore. */
|
return 0; /* A zombie -- ignore. */
|
|
|
ptid = ptid_build (GET_PID (inferior_ptid), ti.ti_lid, ti.ti_tid);
|
ptid = ptid_build (GET_PID (inferior_ptid), ti.ti_lid, ti.ti_tid);
|
|
|
if (ti.ti_tid == 0)
|
if (ti.ti_tid == 0)
|
{
|
{
|
/* A thread ID of zero means that this is the main thread, but
|
/* A thread ID of zero means that this is the main thread, but
|
glibc has not yet initialized thread-local storage and the
|
glibc has not yet initialized thread-local storage and the
|
pthread library. We do not know what the thread's TID will
|
pthread library. We do not know what the thread's TID will
|
be yet. Just enable event reporting and otherwise ignore
|
be yet. Just enable event reporting and otherwise ignore
|
it. */
|
it. */
|
|
|
err = td_thr_event_enable_p (th_p, 1);
|
err = td_thr_event_enable_p (th_p, 1);
|
if (err != TD_OK)
|
if (err != TD_OK)
|
error (_("Cannot enable thread event reporting for %s: %s"),
|
error (_("Cannot enable thread event reporting for %s: %s"),
|
target_pid_to_str (ptid), thread_db_err_str (err));
|
target_pid_to_str (ptid), thread_db_err_str (err));
|
|
|
return 0;
|
return 0;
|
}
|
}
|
|
|
if (!in_thread_list (ptid))
|
if (!in_thread_list (ptid))
|
attach_thread (ptid, th_p, &ti);
|
attach_thread (ptid, th_p, &ti);
|
|
|
return 0;
|
return 0;
|
}
|
}
|
|
|
static void
|
static void
|
thread_db_find_new_threads (void)
|
thread_db_find_new_threads (void)
|
{
|
{
|
td_err_e err;
|
td_err_e err;
|
|
|
/* Iterate over all user-space threads to discover new threads. */
|
/* Iterate over all user-space threads to discover new threads. */
|
err = td_ta_thr_iter_p (thread_agent, find_new_threads_callback, NULL,
|
err = td_ta_thr_iter_p (thread_agent, find_new_threads_callback, NULL,
|
TD_THR_ANY_STATE, TD_THR_LOWEST_PRIORITY,
|
TD_THR_ANY_STATE, TD_THR_LOWEST_PRIORITY,
|
TD_SIGNO_MASK, TD_THR_ANY_USER_FLAGS);
|
TD_SIGNO_MASK, TD_THR_ANY_USER_FLAGS);
|
if (err != TD_OK)
|
if (err != TD_OK)
|
error (_("Cannot find new threads: %s"), thread_db_err_str (err));
|
error (_("Cannot find new threads: %s"), thread_db_err_str (err));
|
}
|
}
|
|
|
static char *
|
static char *
|
thread_db_pid_to_str (ptid_t ptid)
|
thread_db_pid_to_str (ptid_t ptid)
|
{
|
{
|
if (is_thread (ptid))
|
if (is_thread (ptid))
|
{
|
{
|
static char buf[64];
|
static char buf[64];
|
struct thread_info *thread_info;
|
struct thread_info *thread_info;
|
|
|
thread_info = find_thread_pid (ptid);
|
thread_info = find_thread_pid (ptid);
|
if (thread_info == NULL)
|
if (thread_info == NULL)
|
snprintf (buf, sizeof (buf), "Thread 0x%lx (LWP %ld) (Missing)",
|
snprintf (buf, sizeof (buf), "Thread 0x%lx (LWP %ld) (Missing)",
|
GET_THREAD (ptid), GET_LWP (ptid));
|
GET_THREAD (ptid), GET_LWP (ptid));
|
else
|
else
|
snprintf (buf, sizeof (buf), "Thread 0x%lx (LWP %ld)",
|
snprintf (buf, sizeof (buf), "Thread 0x%lx (LWP %ld)",
|
GET_THREAD (ptid), GET_LWP (ptid));
|
GET_THREAD (ptid), GET_LWP (ptid));
|
|
|
return buf;
|
return buf;
|
}
|
}
|
|
|
if (target_beneath->to_pid_to_str (ptid))
|
if (target_beneath->to_pid_to_str (ptid))
|
return target_beneath->to_pid_to_str (ptid);
|
return target_beneath->to_pid_to_str (ptid);
|
|
|
return normal_pid_to_str (ptid);
|
return normal_pid_to_str (ptid);
|
}
|
}
|
|
|
/* Return a string describing the state of the thread specified by
|
/* Return a string describing the state of the thread specified by
|
INFO. */
|
INFO. */
|
|
|
static char *
|
static char *
|
thread_db_extra_thread_info (struct thread_info *info)
|
thread_db_extra_thread_info (struct thread_info *info)
|
{
|
{
|
if (info->private->dying)
|
if (info->private->dying)
|
return "Exiting";
|
return "Exiting";
|
|
|
return NULL;
|
return NULL;
|
}
|
}
|
|
|
/* Return 1 if this thread has the same LWP as the passed PTID. */
|
/* Return 1 if this thread has the same LWP as the passed PTID. */
|
|
|
static int
|
static int
|
same_ptid_callback (struct thread_info *thread, void *arg)
|
same_ptid_callback (struct thread_info *thread, void *arg)
|
{
|
{
|
ptid_t *ptid_p = arg;
|
ptid_t *ptid_p = arg;
|
|
|
return GET_LWP (thread->ptid) == GET_LWP (*ptid_p);
|
return GET_LWP (thread->ptid) == GET_LWP (*ptid_p);
|
}
|
}
|
|
|
/* Get the address of the thread local variable in load module LM which
|
/* Get the address of the thread local variable in load module LM which
|
is stored at OFFSET within the thread local storage for thread PTID. */
|
is stored at OFFSET within the thread local storage for thread PTID. */
|
|
|
static CORE_ADDR
|
static CORE_ADDR
|
thread_db_get_thread_local_address (ptid_t ptid,
|
thread_db_get_thread_local_address (ptid_t ptid,
|
CORE_ADDR lm,
|
CORE_ADDR lm,
|
CORE_ADDR offset)
|
CORE_ADDR offset)
|
{
|
{
|
/* If we have not discovered any threads yet, check now. */
|
/* If we have not discovered any threads yet, check now. */
|
if (!is_thread (ptid) && !have_threads ())
|
if (!is_thread (ptid) && !have_threads ())
|
thread_db_find_new_threads ();
|
thread_db_find_new_threads ();
|
|
|
/* Try to find a matching thread if we still have the LWP ID instead
|
/* Try to find a matching thread if we still have the LWP ID instead
|
of the thread ID. */
|
of the thread ID. */
|
if (!is_thread (ptid))
|
if (!is_thread (ptid))
|
{
|
{
|
struct thread_info *thread;
|
struct thread_info *thread;
|
|
|
thread = iterate_over_threads (same_ptid_callback, &ptid);
|
thread = iterate_over_threads (same_ptid_callback, &ptid);
|
if (thread != NULL)
|
if (thread != NULL)
|
ptid = thread->ptid;
|
ptid = thread->ptid;
|
}
|
}
|
|
|
if (is_thread (ptid))
|
if (is_thread (ptid))
|
{
|
{
|
td_err_e err;
|
td_err_e err;
|
void *address;
|
void *address;
|
struct thread_info *thread_info;
|
struct thread_info *thread_info;
|
|
|
/* glibc doesn't provide the needed interface. */
|
/* glibc doesn't provide the needed interface. */
|
if (!td_thr_tls_get_addr_p)
|
if (!td_thr_tls_get_addr_p)
|
throw_error (TLS_NO_LIBRARY_SUPPORT_ERROR,
|
throw_error (TLS_NO_LIBRARY_SUPPORT_ERROR,
|
_("No TLS library support"));
|
_("No TLS library support"));
|
|
|
/* Caller should have verified that lm != 0. */
|
/* Caller should have verified that lm != 0. */
|
gdb_assert (lm != 0);
|
gdb_assert (lm != 0);
|
|
|
/* Get info about the thread. */
|
/* Get info about the thread. */
|
thread_info = find_thread_pid (ptid);
|
thread_info = find_thread_pid (ptid);
|
gdb_assert (thread_info);
|
gdb_assert (thread_info);
|
thread_db_map_id2thr (thread_info, 1);
|
thread_db_map_id2thr (thread_info, 1);
|
|
|
/* Finally, get the address of the variable. */
|
/* Finally, get the address of the variable. */
|
err = td_thr_tls_get_addr_p (&thread_info->private->th,
|
err = td_thr_tls_get_addr_p (&thread_info->private->th,
|
(void *)(size_t) lm,
|
(void *)(size_t) lm,
|
offset, &address);
|
offset, &address);
|
|
|
#ifdef THREAD_DB_HAS_TD_NOTALLOC
|
#ifdef THREAD_DB_HAS_TD_NOTALLOC
|
/* The memory hasn't been allocated, yet. */
|
/* The memory hasn't been allocated, yet. */
|
if (err == TD_NOTALLOC)
|
if (err == TD_NOTALLOC)
|
/* Now, if libthread_db provided the initialization image's
|
/* Now, if libthread_db provided the initialization image's
|
address, we *could* try to build a non-lvalue value from
|
address, we *could* try to build a non-lvalue value from
|
the initialization image. */
|
the initialization image. */
|
throw_error (TLS_NOT_ALLOCATED_YET_ERROR,
|
throw_error (TLS_NOT_ALLOCATED_YET_ERROR,
|
_("TLS not allocated yet"));
|
_("TLS not allocated yet"));
|
#endif
|
#endif
|
|
|
/* Something else went wrong. */
|
/* Something else went wrong. */
|
if (err != TD_OK)
|
if (err != TD_OK)
|
throw_error (TLS_GENERIC_ERROR,
|
throw_error (TLS_GENERIC_ERROR,
|
(("%s")), thread_db_err_str (err));
|
(("%s")), thread_db_err_str (err));
|
|
|
/* Cast assuming host == target. Joy. */
|
/* Cast assuming host == target. Joy. */
|
/* Do proper sign extension for the target. */
|
/* Do proper sign extension for the target. */
|
gdb_assert (exec_bfd);
|
gdb_assert (exec_bfd);
|
return (bfd_get_sign_extend_vma (exec_bfd) > 0
|
return (bfd_get_sign_extend_vma (exec_bfd) > 0
|
? (CORE_ADDR) (intptr_t) address
|
? (CORE_ADDR) (intptr_t) address
|
: (CORE_ADDR) (uintptr_t) address);
|
: (CORE_ADDR) (uintptr_t) address);
|
}
|
}
|
|
|
if (target_beneath->to_get_thread_local_address)
|
if (target_beneath->to_get_thread_local_address)
|
return target_beneath->to_get_thread_local_address (ptid, lm, offset);
|
return target_beneath->to_get_thread_local_address (ptid, lm, offset);
|
else
|
else
|
throw_error (TLS_GENERIC_ERROR,
|
throw_error (TLS_GENERIC_ERROR,
|
_("TLS not supported on this target"));
|
_("TLS not supported on this target"));
|
}
|
}
|
|
|
static void
|
static void
|
init_thread_db_ops (void)
|
init_thread_db_ops (void)
|
{
|
{
|
thread_db_ops.to_shortname = "multi-thread";
|
thread_db_ops.to_shortname = "multi-thread";
|
thread_db_ops.to_longname = "multi-threaded child process.";
|
thread_db_ops.to_longname = "multi-threaded child process.";
|
thread_db_ops.to_doc = "Threads and pthreads support.";
|
thread_db_ops.to_doc = "Threads and pthreads support.";
|
thread_db_ops.to_detach = thread_db_detach;
|
thread_db_ops.to_detach = thread_db_detach;
|
thread_db_ops.to_resume = thread_db_resume;
|
thread_db_ops.to_resume = thread_db_resume;
|
thread_db_ops.to_wait = thread_db_wait;
|
thread_db_ops.to_wait = thread_db_wait;
|
thread_db_ops.to_kill = thread_db_kill;
|
thread_db_ops.to_kill = thread_db_kill;
|
thread_db_ops.to_mourn_inferior = thread_db_mourn_inferior;
|
thread_db_ops.to_mourn_inferior = thread_db_mourn_inferior;
|
thread_db_ops.to_find_new_threads = thread_db_find_new_threads;
|
thread_db_ops.to_find_new_threads = thread_db_find_new_threads;
|
thread_db_ops.to_pid_to_str = thread_db_pid_to_str;
|
thread_db_ops.to_pid_to_str = thread_db_pid_to_str;
|
thread_db_ops.to_stratum = thread_stratum;
|
thread_db_ops.to_stratum = thread_stratum;
|
thread_db_ops.to_has_thread_control = tc_schedlock;
|
thread_db_ops.to_has_thread_control = tc_schedlock;
|
thread_db_ops.to_get_thread_local_address
|
thread_db_ops.to_get_thread_local_address
|
= thread_db_get_thread_local_address;
|
= thread_db_get_thread_local_address;
|
thread_db_ops.to_extra_thread_info = thread_db_extra_thread_info;
|
thread_db_ops.to_extra_thread_info = thread_db_extra_thread_info;
|
thread_db_ops.to_magic = OPS_MAGIC;
|
thread_db_ops.to_magic = OPS_MAGIC;
|
}
|
}
|
|
|
void
|
void
|
_initialize_thread_db (void)
|
_initialize_thread_db (void)
|
{
|
{
|
/* Only initialize the module if we can load libthread_db. */
|
/* Only initialize the module if we can load libthread_db. */
|
if (thread_db_load ())
|
if (thread_db_load ())
|
{
|
{
|
init_thread_db_ops ();
|
init_thread_db_ops ();
|
add_target (&thread_db_ops);
|
add_target (&thread_db_ops);
|
|
|
/* Add ourselves to objfile event chain. */
|
/* Add ourselves to objfile event chain. */
|
observer_attach_new_objfile (thread_db_new_objfile);
|
observer_attach_new_objfile (thread_db_new_objfile);
|
}
|
}
|
}
|
}
|
|
|
