* thread-db.c: Remove.
* Makefile.in (linux-thread-db.o): Rename from thread-db.o rule.
* config/alpha/alpha-linux.mh (NATDEPFILES): Rename thread-db.o
to linux-thread-db.o.
* config/arm/linux.mh (NATDEPFILES): Likewise.
* config/i386/linux.mh (NATDEPFILES): Likewise.
* config/i386/linux64.mh (NATDEPFILES): Likewise.
* config/ia64/linux.mh (NATDEPFILES): Likewise.
* config/m32r/linux.mh (NATDEPFILES): Likewise.
* config/m68k/linux.mh (NATDEPFILES): Likewise.
* config/mips/linux.mh (NATDEPFILES): Likewise.
* config/pa/linux.mh (NATDEPFILES): Likewise.
* config/powerpc/linux.mh (NATDEPFILES): Likewise.
* config/powerpc/ppc64-linux.mh (NATDEPFILES): Likewise.
* config/s390/s390.mh (NATDEPFILES): Likewise.
* config/sparc/linux.mh (NATDEPFILES): Likewise.
* config/sparc/linux64.mh (NATDEPFILES): Likewise.
+2004-11-14 Daniel Jacobowitz <dan@debian.org>
+
+ * linux-thread-db.c: New file, renamed from thread-db.c.
+ * thread-db.c: Remove.
+ * Makefile.in (linux-thread-db.o): Rename from thread-db.o rule.
+ * config/alpha/alpha-linux.mh (NATDEPFILES): Rename thread-db.o
+ to linux-thread-db.o.
+ * config/arm/linux.mh (NATDEPFILES): Likewise.
+ * config/i386/linux.mh (NATDEPFILES): Likewise.
+ * config/i386/linux64.mh (NATDEPFILES): Likewise.
+ * config/ia64/linux.mh (NATDEPFILES): Likewise.
+ * config/m32r/linux.mh (NATDEPFILES): Likewise.
+ * config/m68k/linux.mh (NATDEPFILES): Likewise.
+ * config/mips/linux.mh (NATDEPFILES): Likewise.
+ * config/pa/linux.mh (NATDEPFILES): Likewise.
+ * config/powerpc/linux.mh (NATDEPFILES): Likewise.
+ * config/powerpc/ppc64-linux.mh (NATDEPFILES): Likewise.
+ * config/s390/s390.mh (NATDEPFILES): Likewise.
+ * config/sparc/linux.mh (NATDEPFILES): Likewise.
+ * config/sparc/linux64.mh (NATDEPFILES): Likewise.
+
2004-11-13 Andrew Cagney <cagney@gnu.org>
* config/i386/i386lynx.mh: Delete file.
# FIXME: Thread-db.o gets warnings because the definitions of the register
# sets are different from kernel to kernel.
-thread-db.o: $(srcdir)/thread-db.c
+linux-thread-db.o: $(srcdir)/linux-thread-db.c
$(CC) -c $(INTERNAL_WARN_CFLAGS) $(NO_WERROR_CFLAGS) \
- $(srcdir)/thread-db.c
+ $(srcdir)/linux-thread-db.c
v850ice.o: $(srcdir)/v850ice.c
$(CC) -c $(INTERNAL_CFLAGS) $(IDE_CFLAGS) $(ITCL_CFLAGS) \
thread.o: thread.c $(defs_h) $(symtab_h) $(frame_h) $(inferior_h) \
$(environ_h) $(value_h) $(target_h) $(gdbthread_h) $(command_h) \
$(gdbcmd_h) $(regcache_h) $(gdb_h) $(gdb_string_h) $(ui_out_h)
-thread-db.o: thread-db.c $(defs_h) $(gdb_assert_h) $(gdb_proc_service_h) \
- $(gdb_thread_db_h) $(bfd_h) $(gdbthread_h) $(inferior_h) \
- $(symfile_h) $(objfiles_h) $(target_h) $(regcache_h) $(solib_svr4_h)
+linux-thread-db.o: linux-thread-db.c $(defs_h) $(gdb_assert_h)
+ $(gdb_proc_service_h) $(gdb_thread_db_h) $(bfd_h) $(gdbthread_h) \
+ $(inferior_h) $(symfile_h) $(objfiles_h) $(target_h) $(regcache_h) \
+ $(solib_svr4_h)
top.o: top.c $(defs_h) $(gdbcmd_h) $(call_cmds_h) $(cli_cmds_h) \
$(cli_script_h) $(cli_setshow_h) $(cli_decode_h) $(symtab_h) \
$(inferior_h) $(target_h) $(breakpoint_h) $(gdbtypes_h) \
# Host: Little-endian Alpha running Linux
NAT_FILE= nm-linux.h
NATDEPFILES= infptrace.o inftarg.o corelow.o alpha-nat.o \
- fork-child.o proc-service.o thread-db.o gcore.o \
+ fork-child.o proc-service.o linux-thread-db.o gcore.o \
linux-nat.o
# The dynamically loaded libthread_db needs access to symbols in the
NAT_FILE= nm-linux.h
NATDEPFILES= infptrace.o inftarg.o fork-child.o corelow.o \
core-regset.o arm-linux-nat.o gcore.o \
- proc-service.o thread-db.o linux-nat.o
+ proc-service.o linux-thread-db.o linux-nat.o
LOADLIBES= -ldl -rdynamic
NAT_FILE= nm-linux.h
NATDEPFILES= infptrace.o inftarg.o fork-child.o corelow.o \
core-aout.o i386-nat.o i386-linux-nat.o \
- proc-service.o thread-db.o gcore.o \
+ proc-service.o linux-thread-db.o gcore.o \
linux-nat.o
# The dynamically loaded libthread_db needs access to symbols in the
# Host: GNU/Linux x86-64
NATDEPFILES= infptrace.o inftarg.o fork-child.o \
i386-nat.o amd64-nat.o amd64-linux-nat.o linux-nat.o \
- proc-service.o thread-db.o gcore.o
+ proc-service.o linux-thread-db.o gcore.o
NAT_FILE= nm-linux64.h
# The dynamically loaded libthread_db needs access to symbols in the
NAT_FILE= nm-linux.h
NATDEPFILES= infptrace.o inftarg.o fork-child.o corelow.o gcore.o \
core-aout.o core-regset.o ia64-linux-nat.o \
- proc-service.o thread-db.o linux-nat.o
+ proc-service.o linux-thread-db.o linux-nat.o
LOADLIBES = -ldl -rdynamic
NAT_FILE= nm-linux.h
NATDEPFILES= infptrace.o inftarg.o fork-child.o corelow.o \
- m32r-linux-nat.o gcore.o proc-service.o thread-db.o \
+ m32r-linux-nat.o gcore.o proc-service.o linux-thread-db.o \
linux-nat.o
LOADLIBES= -ldl -rdynamic
NAT_FILE= nm-linux.h
NATDEPFILES= infptrace.o inftarg.o fork-child.o \
corelow.o core-aout.o m68klinux-nat.o gcore.o \
- proc-service.o thread-db.o linux-nat.o
+ proc-service.o linux-thread-db.o linux-nat.o
# The dynamically loaded libthread_db needs access to symbols in the
# gdb executable.
# Host: Linux/MIPS
NAT_FILE= nm-linux.h
NATDEPFILES= infptrace.o inftarg.o fork-child.o mips-linux-nat.o \
- thread-db.o proc-service.o gcore.o \
+ linux-thread-db.o proc-service.o gcore.o \
linux-nat.o
LOADLIBES = -ldl -rdynamic
NAT_FILE= nm-linux.h
NATDEPFILES= infptrace.o inftarg.o fork-child.o corelow.o gcore.o \
core-regset.o hppa-linux-nat.o \
- proc-service.o thread-db.o linux-nat.o
+ proc-service.o linux-thread-db.o linux-nat.o
LOADLIBES = -ldl -rdynamic
NAT_FILE= nm-linux.h
NATDEPFILES= infptrace.o inftarg.o fork-child.o \
- ppc-linux-nat.o proc-service.o thread-db.o \
+ ppc-linux-nat.o proc-service.o linux-thread-db.o \
gcore.o linux-nat.o
LOADLIBES = -ldl -rdynamic
NAT_FILE= nm-ppc64-linux.h
NATDEPFILES= infptrace.o inftarg.o fork-child.o \
- ppc-linux-nat.o proc-service.o thread-db.o \
+ ppc-linux-nat.o proc-service.o linux-thread-db.o \
gcore.o linux-nat.o
# The PowerPC has severe limitations on TOC size, and uses them even
# Host: S390, running Linux
NAT_FILE= nm-linux.h
NATDEPFILES= infptrace.o inftarg.o fork-child.o corelow.o s390-nat.o \
- gcore.o thread-db.o proc-service.o linux-nat.o
+ gcore.o linux-thread-db.o proc-service.o linux-nat.o
LOADLIBES = -ldl -rdynamic
NATDEPFILES= sparc-nat.o sparc-sol2-nat.o \
corelow.o core-regset.o fork-child.o inf-ptrace.o \
infptrace.o inftarg.o \
- proc-service.o thread-db.o \
+ proc-service.o linux-thread-db.o \
gcore.o linux-nat.o
# The dynamically loaded libthread_db needs access to symbols in the
NATDEPFILES= sparc-nat.o sparc64-nat.o sparc-sol2-nat.o sparc64-linux-nat.o \
corelow.o core-regset.o \
fork-child.o inf-ptrace.o infptrace.o inftarg.o \
- proc-service.o thread-db.o \
+ proc-service.o linux-thread-db.o \
gcore.o linux-nat.o
# The dynamically loaded libthread_db needs access to symbols in the
--- /dev/null
+/* libthread_db assisted debugging support, generic parts.
+
+ Copyright 1999, 2000, 2001, 2003, 2004 Free Software Foundation, Inc.
+
+ This file is part of GDB.
+
+ 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
+ the Free Software Foundation; either version 2 of the License, or
+ (at your option) any later version.
+
+ This program is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program; if not, write to the Free Software
+ Foundation, Inc., 59 Temple Place - Suite 330,
+ Boston, MA 02111-1307, USA. */
+
+#include "defs.h"
+
+#include "gdb_assert.h"
+#include <dlfcn.h>
+#include "gdb_proc_service.h"
+#include "gdb_thread_db.h"
+
+#include "bfd.h"
+#include "gdbthread.h"
+#include "inferior.h"
+#include "symfile.h"
+#include "objfiles.h"
+#include "target.h"
+#include "regcache.h"
+#include "solib-svr4.h"
+
+#ifdef HAVE_GNU_LIBC_VERSION_H
+#include <gnu/libc-version.h>
+#endif
+
+#ifndef LIBTHREAD_DB_SO
+#define LIBTHREAD_DB_SO "libthread_db.so.1"
+#endif
+
+/* If we're running on GNU/Linux, we must explicitly attach to any new
+ threads. */
+
+/* FIXME: There is certainly some room for improvements:
+ - Cache LWP ids.
+ - Bypass libthread_db when fetching or storing registers for
+ threads bound to a LWP. */
+
+/* This module's target vector. */
+static struct target_ops thread_db_ops;
+
+/* The target vector that we call for things this module can't handle. */
+static struct target_ops *target_beneath;
+
+/* Pointer to the next function on the objfile event chain. */
+static void (*target_new_objfile_chain) (struct objfile * objfile);
+
+/* Non-zero if we're using this module's target vector. */
+static int using_thread_db;
+
+/* Non-zero if we have determined the signals used by the threads
+ library. */
+static int thread_signals;
+static sigset_t thread_stop_set;
+static sigset_t thread_print_set;
+
+/* Structure that identifies the child process for the
+ <proc_service.h> interface. */
+static struct ps_prochandle proc_handle;
+
+/* Connection to the libthread_db library. */
+static td_thragent_t *thread_agent;
+
+/* Pointers to the libthread_db functions. */
+
+static td_err_e (*td_init_p) (void);
+
+static td_err_e (*td_ta_new_p) (struct ps_prochandle * ps,
+ td_thragent_t **ta);
+static td_err_e (*td_ta_map_id2thr_p) (const td_thragent_t *ta, thread_t pt,
+ td_thrhandle_t *__th);
+static td_err_e (*td_ta_map_lwp2thr_p) (const td_thragent_t *ta,
+ lwpid_t lwpid, td_thrhandle_t *th);
+static td_err_e (*td_ta_thr_iter_p) (const td_thragent_t *ta,
+ td_thr_iter_f *callback, void *cbdata_p,
+ td_thr_state_e state, int ti_pri,
+ sigset_t *ti_sigmask_p,
+ unsigned int ti_user_flags);
+static td_err_e (*td_ta_event_addr_p) (const td_thragent_t *ta,
+ td_event_e event, td_notify_t *ptr);
+static td_err_e (*td_ta_set_event_p) (const td_thragent_t *ta,
+ td_thr_events_t *event);
+static td_err_e (*td_ta_event_getmsg_p) (const td_thragent_t *ta,
+ td_event_msg_t *msg);
+
+static td_err_e (*td_thr_validate_p) (const td_thrhandle_t *th);
+static td_err_e (*td_thr_get_info_p) (const td_thrhandle_t *th,
+ td_thrinfo_t *infop);
+static td_err_e (*td_thr_getfpregs_p) (const td_thrhandle_t *th,
+ gdb_prfpregset_t *regset);
+static td_err_e (*td_thr_getgregs_p) (const td_thrhandle_t *th,
+ prgregset_t gregs);
+static td_err_e (*td_thr_setfpregs_p) (const td_thrhandle_t *th,
+ const gdb_prfpregset_t *fpregs);
+static td_err_e (*td_thr_setgregs_p) (const td_thrhandle_t *th,
+ prgregset_t gregs);
+static td_err_e (*td_thr_event_enable_p) (const td_thrhandle_t *th,
+ int event);
+
+static td_err_e (*td_thr_tls_get_addr_p) (const td_thrhandle_t *th,
+ void *map_address,
+ size_t offset, void **address);
+
+/* Location of the thread creation event breakpoint. The code at this
+ location in the child process will be called by the pthread library
+ whenever a new thread is created. By setting a special breakpoint
+ at this location, GDB can detect when a new thread is created. We
+ obtain this location via the td_ta_event_addr call. */
+static CORE_ADDR td_create_bp_addr;
+
+/* Location of the thread death event breakpoint. */
+static CORE_ADDR td_death_bp_addr;
+
+/* Prototypes for local functions. */
+static void thread_db_find_new_threads (void);
+static void attach_thread (ptid_t ptid, const td_thrhandle_t *th_p,
+ const td_thrinfo_t *ti_p, int verbose);
+static void detach_thread (ptid_t ptid, int verbose);
+\f
+
+/* Building process ids. */
+
+#define GET_PID(ptid) ptid_get_pid (ptid)
+#define GET_LWP(ptid) ptid_get_lwp (ptid)
+#define GET_THREAD(ptid) ptid_get_tid (ptid)
+
+#define is_lwp(ptid) (GET_LWP (ptid) != 0)
+#define is_thread(ptid) (GET_THREAD (ptid) != 0)
+
+#define BUILD_LWP(lwp, pid) ptid_build (pid, lwp, 0)
+#define BUILD_THREAD(tid, pid) ptid_build (pid, 0, tid)
+\f
+
+/* Use "struct private_thread_info" to cache thread state. This is
+ a substantial optimization. */
+
+struct private_thread_info
+{
+ /* Flag set when we see a TD_DEATH event for this thread. */
+ unsigned int dying:1;
+
+ /* Cached thread state. */
+ unsigned int th_valid:1;
+ unsigned int ti_valid:1;
+
+ td_thrhandle_t th;
+ td_thrinfo_t ti;
+};
+\f
+
+static char *
+thread_db_err_str (td_err_e err)
+{
+ static char buf[64];
+
+ switch (err)
+ {
+ case TD_OK:
+ return "generic 'call succeeded'";
+ case TD_ERR:
+ return "generic error";
+ case TD_NOTHR:
+ return "no thread to satisfy query";
+ case TD_NOSV:
+ return "no sync handle to satisfy query";
+ case TD_NOLWP:
+ return "no LWP to satisfy query";
+ case TD_BADPH:
+ return "invalid process handle";
+ case TD_BADTH:
+ return "invalid thread handle";
+ case TD_BADSH:
+ return "invalid synchronization handle";
+ case TD_BADTA:
+ return "invalid thread agent";
+ case TD_BADKEY:
+ return "invalid key";
+ case TD_NOMSG:
+ return "no event message for getmsg";
+ case TD_NOFPREGS:
+ return "FPU register set not available";
+ case TD_NOLIBTHREAD:
+ return "application not linked with libthread";
+ case TD_NOEVENT:
+ return "requested event is not supported";
+ case TD_NOCAPAB:
+ return "capability not available";
+ case TD_DBERR:
+ return "debugger service failed";
+ case TD_NOAPLIC:
+ return "operation not applicable to";
+ case TD_NOTSD:
+ return "no thread-specific data for this thread";
+ case TD_MALLOC:
+ return "malloc failed";
+ case TD_PARTIALREG:
+ return "only part of register set was written/read";
+ case TD_NOXREGS:
+ return "X register set not available for this thread";
+ default:
+ snprintf (buf, sizeof (buf), "unknown thread_db error '%d'", err);
+ return buf;
+ }
+}
+
+static char *
+thread_db_state_str (td_thr_state_e state)
+{
+ static char buf[64];
+
+ switch (state)
+ {
+ case TD_THR_STOPPED:
+ return "stopped by debugger";
+ case TD_THR_RUN:
+ return "runnable";
+ case TD_THR_ACTIVE:
+ return "active";
+ case TD_THR_ZOMBIE:
+ return "zombie";
+ case TD_THR_SLEEP:
+ return "sleeping";
+ case TD_THR_STOPPED_ASLEEP:
+ return "stopped by debugger AND blocked";
+ default:
+ snprintf (buf, sizeof (buf), "unknown thread_db state %d", state);
+ return buf;
+ }
+}
+\f
+/* A callback function for td_ta_thr_iter, which we use to map all
+ threads to LWPs.
+
+ THP is a handle to the current thread; if INFOP is not NULL, the
+ struct thread_info associated with this thread is returned in
+ *INFOP.
+
+ If the thread is a zombie, TD_THR_ZOMBIE is returned. Otherwise,
+ zero is returned to indicate success. */
+
+static int
+thread_get_info_callback (const td_thrhandle_t *thp, void *infop)
+{
+ td_thrinfo_t ti;
+ td_err_e err;
+ struct thread_info *thread_info;
+ ptid_t thread_ptid;
+
+ err = td_thr_get_info_p (thp, &ti);
+ if (err != TD_OK)
+ error ("thread_get_info_callback: cannot get thread info: %s",
+ thread_db_err_str (err));
+
+ /* Fill the cache. */
+ thread_ptid = BUILD_THREAD (ti.ti_tid, GET_PID (inferior_ptid));
+ thread_info = find_thread_pid (thread_ptid);
+
+ /* In the case of a zombie thread, don't continue. We don't want to
+ attach to it thinking it is a new thread. */
+ if (ti.ti_state == TD_THR_UNKNOWN || ti.ti_state == TD_THR_ZOMBIE)
+ {
+ if (infop != NULL)
+ *(struct thread_info **) infop = thread_info;
+ if (thread_info != NULL)
+ {
+ memcpy (&thread_info->private->th, thp, sizeof (*thp));
+ thread_info->private->th_valid = 1;
+ memcpy (&thread_info->private->ti, &ti, sizeof (ti));
+ thread_info->private->ti_valid = 1;
+ }
+ return TD_THR_ZOMBIE;
+ }
+
+ if (thread_info == NULL)
+ {
+ /* New thread. Attach to it now (why wait?). */
+ attach_thread (thread_ptid, thp, &ti, 1);
+ thread_info = find_thread_pid (thread_ptid);
+ gdb_assert (thread_info != NULL);
+ }
+
+ memcpy (&thread_info->private->th, thp, sizeof (*thp));
+ thread_info->private->th_valid = 1;
+ memcpy (&thread_info->private->ti, &ti, sizeof (ti));
+ thread_info->private->ti_valid = 1;
+
+ if (infop != NULL)
+ *(struct thread_info **) infop = thread_info;
+
+ return 0;
+}
+
+/* Accessor functions for the thread_db information, with caching. */
+
+static void
+thread_db_map_id2thr (struct thread_info *thread_info, int fatal)
+{
+ td_err_e err;
+
+ if (thread_info->private->th_valid)
+ return;
+
+ err = td_ta_map_id2thr_p (thread_agent, GET_THREAD (thread_info->ptid),
+ &thread_info->private->th);
+ if (err != TD_OK)
+ {
+ if (fatal)
+ error ("Cannot find thread %ld: %s",
+ (long) GET_THREAD (thread_info->ptid),
+ thread_db_err_str (err));
+ }
+ else
+ thread_info->private->th_valid = 1;
+}
+
+static td_thrinfo_t *
+thread_db_get_info (struct thread_info *thread_info)
+{
+ td_err_e err;
+
+ if (thread_info->private->ti_valid)
+ return &thread_info->private->ti;
+
+ if (!thread_info->private->th_valid)
+ thread_db_map_id2thr (thread_info, 1);
+
+ err =
+ td_thr_get_info_p (&thread_info->private->th, &thread_info->private->ti);
+ if (err != TD_OK)
+ error ("thread_db_get_info: cannot get thread info: %s",
+ thread_db_err_str (err));
+
+ thread_info->private->ti_valid = 1;
+ return &thread_info->private->ti;
+}
+\f
+/* Convert between user-level thread ids and LWP ids. */
+
+static ptid_t
+thread_from_lwp (ptid_t ptid)
+{
+ td_thrhandle_t th;
+ td_err_e err;
+ struct thread_info *thread_info;
+ ptid_t thread_ptid;
+
+ if (GET_LWP (ptid) == 0)
+ ptid = BUILD_LWP (GET_PID (ptid), GET_PID (ptid));
+
+ gdb_assert (is_lwp (ptid));
+
+ err = td_ta_map_lwp2thr_p (thread_agent, GET_LWP (ptid), &th);
+ if (err != TD_OK)
+ error ("Cannot find user-level thread for LWP %ld: %s",
+ GET_LWP (ptid), thread_db_err_str (err));
+
+ thread_info = NULL;
+
+ /* Fetch the thread info. If we get back TD_THR_ZOMBIE, then the
+ event thread has already died. If another gdb interface has called
+ 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
+ to avoid the possibility of later treating it as a newly
+ 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
+ dead thread. */
+ if (thread_get_info_callback (&th, &thread_info) == TD_THR_ZOMBIE
+ && thread_info == NULL)
+ return pid_to_ptid (-1);
+
+ gdb_assert (thread_info && thread_info->private->ti_valid);
+
+ return BUILD_THREAD (thread_info->private->ti.ti_tid, GET_PID (ptid));
+}
+
+static ptid_t
+lwp_from_thread (ptid_t ptid)
+{
+ struct thread_info *thread_info;
+ ptid_t thread_ptid;
+
+ if (!is_thread (ptid))
+ return ptid;
+
+ thread_info = find_thread_pid (ptid);
+ thread_db_get_info (thread_info);
+
+ return BUILD_LWP (thread_info->private->ti.ti_lid, GET_PID (ptid));
+}
+\f
+
+void
+thread_db_init (struct target_ops *target)
+{
+ target_beneath = target;
+}
+
+static void *
+verbose_dlsym (void *handle, const char *name)
+{
+ void *sym = dlsym (handle, name);
+ if (sym == NULL)
+ warning ("Symbol \"%s\" not found in libthread_db: %s", name, dlerror ());
+ return sym;
+}
+
+static int
+thread_db_load (void)
+{
+ void *handle;
+ td_err_e err;
+
+ handle = dlopen (LIBTHREAD_DB_SO, RTLD_NOW);
+ if (handle == NULL)
+ {
+ fprintf_filtered (gdb_stderr, "\n\ndlopen failed on '%s' - %s\n",
+ LIBTHREAD_DB_SO, dlerror ());
+ fprintf_filtered (gdb_stderr,
+ "GDB will not be able to debug pthreads.\n\n");
+ return 0;
+ }
+
+ /* Initialize pointers to the dynamic library functions we will use.
+ Essential functions first. */
+
+ td_init_p = verbose_dlsym (handle, "td_init");
+ if (td_init_p == NULL)
+ return 0;
+
+ td_ta_new_p = verbose_dlsym (handle, "td_ta_new");
+ if (td_ta_new_p == NULL)
+ return 0;
+
+ td_ta_map_id2thr_p = verbose_dlsym (handle, "td_ta_map_id2thr");
+ if (td_ta_map_id2thr_p == NULL)
+ return 0;
+
+ td_ta_map_lwp2thr_p = verbose_dlsym (handle, "td_ta_map_lwp2thr");
+ if (td_ta_map_lwp2thr_p == NULL)
+ return 0;
+
+ td_ta_thr_iter_p = verbose_dlsym (handle, "td_ta_thr_iter");
+ if (td_ta_thr_iter_p == NULL)
+ return 0;
+
+ td_thr_validate_p = verbose_dlsym (handle, "td_thr_validate");
+ if (td_thr_validate_p == NULL)
+ return 0;
+
+ td_thr_get_info_p = verbose_dlsym (handle, "td_thr_get_info");
+ if (td_thr_get_info_p == NULL)
+ return 0;
+
+ td_thr_getfpregs_p = verbose_dlsym (handle, "td_thr_getfpregs");
+ if (td_thr_getfpregs_p == NULL)
+ return 0;
+
+ td_thr_getgregs_p = verbose_dlsym (handle, "td_thr_getgregs");
+ if (td_thr_getgregs_p == NULL)
+ return 0;
+
+ td_thr_setfpregs_p = verbose_dlsym (handle, "td_thr_setfpregs");
+ if (td_thr_setfpregs_p == NULL)
+ return 0;
+
+ td_thr_setgregs_p = verbose_dlsym (handle, "td_thr_setgregs");
+ if (td_thr_setgregs_p == NULL)
+ return 0;
+
+ /* Initialize the library. */
+ err = td_init_p ();
+ if (err != TD_OK)
+ {
+ warning ("Cannot initialize libthread_db: %s", thread_db_err_str (err));
+ return 0;
+ }
+
+ /* These are not essential. */
+ td_ta_event_addr_p = dlsym (handle, "td_ta_event_addr");
+ td_ta_set_event_p = dlsym (handle, "td_ta_set_event");
+ td_ta_event_getmsg_p = dlsym (handle, "td_ta_event_getmsg");
+ td_thr_event_enable_p = dlsym (handle, "td_thr_event_enable");
+ td_thr_tls_get_addr_p = dlsym (handle, "td_thr_tls_get_addr");
+
+ return 1;
+}
+
+static td_err_e
+enable_thread_event (td_thragent_t *thread_agent, int event, CORE_ADDR *bp)
+{
+ td_notify_t notify;
+ td_err_e err;
+
+ /* Get the breakpoint address for thread EVENT. */
+ err = td_ta_event_addr_p (thread_agent, event, ¬ify);
+ if (err != TD_OK)
+ return err;
+
+ /* Set up the breakpoint. */
+ (*bp) = gdbarch_convert_from_func_ptr_addr (current_gdbarch,
+ (CORE_ADDR) notify.u.bptaddr,
+ ¤t_target);
+ create_thread_event_breakpoint ((*bp));
+
+ return TD_OK;
+}
+
+static void
+enable_thread_event_reporting (void)
+{
+ td_thr_events_t events;
+ td_notify_t notify;
+ td_err_e err;
+#ifdef HAVE_GNU_LIBC_VERSION_H
+ const char *libc_version;
+ int libc_major, libc_minor;
+#endif
+
+ /* We cannot use the thread event reporting facility if these
+ functions aren't available. */
+ 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)
+ return;
+
+ /* Set the process wide mask saying which events we're interested in. */
+ td_event_emptyset (&events);
+ td_event_addset (&events, TD_CREATE);
+
+#ifdef HAVE_GNU_LIBC_VERSION_H
+ /* FIXME: kettenis/2000-04-23: The event reporting facility is
+ broken for TD_DEATH events in glibc 2.1.3, so don't enable it for
+ now. */
+ libc_version = gnu_get_libc_version ();
+ if (sscanf (libc_version, "%d.%d", &libc_major, &libc_minor) == 2
+ && (libc_major > 2 || (libc_major == 2 && libc_minor > 1)))
+#endif
+ td_event_addset (&events, TD_DEATH);
+
+ err = td_ta_set_event_p (thread_agent, &events);
+ if (err != TD_OK)
+ {
+ warning ("Unable to set global thread event mask: %s",
+ thread_db_err_str (err));
+ return;
+ }
+
+ /* Delete previous thread event breakpoints, if any. */
+ remove_thread_event_breakpoints ();
+ td_create_bp_addr = 0;
+ td_death_bp_addr = 0;
+
+ /* Set up the thread creation event. */
+ err = enable_thread_event (thread_agent, TD_CREATE, &td_create_bp_addr);
+ if (err != TD_OK)
+ {
+ warning ("Unable to get location for thread creation breakpoint: %s",
+ thread_db_err_str (err));
+ return;
+ }
+
+ /* Set up the thread death event. */
+ err = enable_thread_event (thread_agent, TD_DEATH, &td_death_bp_addr);
+ if (err != TD_OK)
+ {
+ warning ("Unable to get location for thread death breakpoint: %s",
+ thread_db_err_str (err));
+ return;
+ }
+}
+
+static void
+disable_thread_event_reporting (void)
+{
+ td_thr_events_t events;
+
+ /* Set the process wide mask saying we aren't interested in any
+ events anymore. */
+ td_event_emptyset (&events);
+ td_ta_set_event_p (thread_agent, &events);
+
+ /* Delete thread event breakpoints, if any. */
+ remove_thread_event_breakpoints ();
+ td_create_bp_addr = 0;
+ td_death_bp_addr = 0;
+}
+
+static void
+check_thread_signals (void)
+{
+#ifdef GET_THREAD_SIGNALS
+ if (!thread_signals)
+ {
+ sigset_t mask;
+ int i;
+
+ GET_THREAD_SIGNALS (&mask);
+ sigemptyset (&thread_stop_set);
+ sigemptyset (&thread_print_set);
+
+ for (i = 1; i < NSIG; i++)
+ {
+ if (sigismember (&mask, i))
+ {
+ if (signal_stop_update (target_signal_from_host (i), 0))
+ sigaddset (&thread_stop_set, i);
+ if (signal_print_update (target_signal_from_host (i), 0))
+ sigaddset (&thread_print_set, i);
+ thread_signals = 1;
+ }
+ }
+ }
+#endif
+}
+
+static void
+thread_db_new_objfile (struct objfile *objfile)
+{
+ td_err_e err;
+
+ /* First time through, report that libthread_db was successfuly
+ loaded. Can't print this in in thread_db_load as, at that stage,
+ the interpreter and it's console haven't started. The real
+ problem here is that libthread_db is loaded too early - it should
+ only be loaded when there is a program to debug. */
+ {
+ static int dejavu;
+ if (!dejavu)
+ {
+ Dl_info info;
+ const char *library = NULL;
+ /* Try dladdr. */
+ if (dladdr ((*td_ta_new_p), &info) != 0)
+ library = info.dli_fname;
+ /* Try dlinfo? */
+ if (library == NULL)
+ /* Paranoid - don't let a NULL path slip through. */
+ library = LIBTHREAD_DB_SO;
+ printf_unfiltered ("Using host libthread_db library \"%s\".\n",
+ library);
+ dejavu = 1;
+ }
+ }
+
+ /* Don't attempt to use thread_db on targets which can not run
+ (core files). */
+ if (objfile == NULL || !target_has_execution)
+ {
+ /* All symbols have been discarded. If the thread_db target is
+ active, deactivate it now. */
+ if (using_thread_db)
+ {
+ gdb_assert (proc_handle.pid == 0);
+ unpush_target (&thread_db_ops);
+ using_thread_db = 0;
+ }
+
+ goto quit;
+ }
+
+ if (using_thread_db)
+ /* Nothing to do. The thread library was already detected and the
+ target vector was already activated. */
+ goto quit;
+
+ /* Initialize the structure that identifies the child process. Note
+ that at this point there is no guarantee that we actually have a
+ child process. */
+ proc_handle.pid = GET_PID (inferior_ptid);
+
+ /* Now attempt to open a connection to the thread library. */
+ err = td_ta_new_p (&proc_handle, &thread_agent);
+ switch (err)
+ {
+ case TD_NOLIBTHREAD:
+ /* No thread library was detected. */
+ break;
+
+ case TD_OK:
+ printf_unfiltered ("[Thread debugging using libthread_db enabled]\n");
+
+ /* The thread library was detected. Activate the thread_db target. */
+ push_target (&thread_db_ops);
+ using_thread_db = 1;
+
+ enable_thread_event_reporting ();
+ thread_db_find_new_threads ();
+ break;
+
+ default:
+ warning ("Cannot initialize thread debugging library: %s",
+ thread_db_err_str (err));
+ break;
+ }
+
+quit:
+ if (target_new_objfile_chain)
+ target_new_objfile_chain (objfile);
+}
+
+/* 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
+ that wasn't already in our list. */
+
+static void
+attach_thread (ptid_t ptid, const td_thrhandle_t *th_p,
+ const td_thrinfo_t *ti_p, int verbose)
+{
+ struct thread_info *tp;
+ td_err_e err;
+
+ /* 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
+ may have iterated over all threads between the thread creation
+ and the TD_CREATE event, for instance when the user has issued
+ the `info threads' command before the SIGTRAP for hitting the
+ thread creation breakpoint was reported. Alternatively, the
+ 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
+ the second case we should discard information about the dead
+ thread and attach to the new one. */
+ if (in_thread_list (ptid))
+ {
+ tp = find_thread_pid (ptid);
+ gdb_assert (tp != NULL);
+
+ if (!tp->private->dying)
+ return;
+
+ delete_thread (ptid);
+ }
+
+ check_thread_signals ();
+
+ /* Add the thread to GDB's thread list. */
+ tp = add_thread (ptid);
+ tp->private = xmalloc (sizeof (struct private_thread_info));
+ memset (tp->private, 0, sizeof (struct private_thread_info));
+
+ if (verbose)
+ printf_unfiltered ("[New %s]\n", target_pid_to_str (ptid));
+
+ if (ti_p->ti_state == TD_THR_UNKNOWN || ti_p->ti_state == TD_THR_ZOMBIE)
+ return; /* A zombie thread -- do not attach. */
+
+ /* Under GNU/Linux, we have to attach to each and every thread. */
+#ifdef ATTACH_LWP
+ ATTACH_LWP (BUILD_LWP (ti_p->ti_lid, GET_PID (ptid)), 0);
+#endif
+
+ /* Enable thread event reporting for this thread. */
+ err = td_thr_event_enable_p (th_p, 1);
+ if (err != TD_OK)
+ error ("Cannot enable thread event reporting for %s: %s",
+ target_pid_to_str (ptid), thread_db_err_str (err));
+}
+
+static void
+thread_db_attach (char *args, int from_tty)
+{
+ target_beneath->to_attach (args, from_tty);
+
+ /* Destroy thread info; it's no longer valid. */
+ init_thread_list ();
+
+ /* The child process is now the actual multi-threaded
+ program. Snatch its process ID... */
+ proc_handle.pid = GET_PID (inferior_ptid);
+
+ /* ...and perform the remaining initialization steps. */
+ enable_thread_event_reporting ();
+ thread_db_find_new_threads ();
+}
+
+static void
+detach_thread (ptid_t ptid, int verbose)
+{
+ struct thread_info *thread_info;
+
+ if (verbose)
+ printf_unfiltered ("[%s exited]\n", target_pid_to_str (ptid));
+
+ /* Don't delete the thread now, because it still reports as active
+ until it has executed a few instructions after the event
+ 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
+ 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
+ something re-uses its thread ID. */
+ thread_info = find_thread_pid (ptid);
+ gdb_assert (thread_info != NULL);
+ thread_info->private->dying = 1;
+}
+
+static void
+thread_db_detach (char *args, int from_tty)
+{
+ disable_thread_event_reporting ();
+
+ /* There's no need to save & restore inferior_ptid here, since the
+ inferior is supposed to be survive this function call. */
+ inferior_ptid = lwp_from_thread (inferior_ptid);
+
+ /* Forget about the child's process ID. We shouldn't need it
+ anymore. */
+ proc_handle.pid = 0;
+
+ target_beneath->to_detach (args, from_tty);
+}
+
+static int
+clear_lwpid_callback (struct thread_info *thread, void *dummy)
+{
+ /* 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
+ are always conservative. */
+
+ thread->private->th_valid = 0;
+ thread->private->ti_valid = 0;
+
+ return 0;
+}
+
+static void
+thread_db_resume (ptid_t ptid, int step, enum target_signal signo)
+{
+ struct cleanup *old_chain = save_inferior_ptid ();
+
+ if (GET_PID (ptid) == -1)
+ inferior_ptid = lwp_from_thread (inferior_ptid);
+ else if (is_thread (ptid))
+ ptid = lwp_from_thread (ptid);
+
+ /* Clear cached data which may not be valid after the resume. */
+ iterate_over_threads (clear_lwpid_callback, NULL);
+
+ target_beneath->to_resume (ptid, step, signo);
+
+ do_cleanups (old_chain);
+}
+
+/* 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
+ the event. */
+
+static void
+check_event (ptid_t ptid)
+{
+ td_event_msg_t msg;
+ td_thrinfo_t ti;
+ td_err_e err;
+ CORE_ADDR stop_pc;
+ int loop = 0;
+
+ /* Bail out early if we're not at a thread event breakpoint. */
+ stop_pc = read_pc_pid (ptid) - DECR_PC_AFTER_BREAK;
+ if (stop_pc != td_create_bp_addr && stop_pc != td_death_bp_addr)
+ return;
+
+ /* 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.
+ We have to call td_ta_event_getmsg() to get
+ the latest message. Since we have no way of correlating whether
+ the event message we get back corresponds to our breakpoint, we must
+ loop and read all event messages, processing them appropriately.
+ This guarantees we will process the correct message before continuing
+ from the breakpoint.
+
+ Currently, death events are not enabled. If they are enabled,
+ the death event can use the td_thr_event_getmsg() interface to
+ get the message specifically for that lwp and avoid looping
+ below. */
+
+ loop = 1;
+
+ do
+ {
+ err = td_ta_event_getmsg_p (thread_agent, &msg);
+ if (err != TD_OK)
+ {
+ if (err == TD_NOMSG)
+ return;
+
+ error ("Cannot get thread event message: %s",
+ thread_db_err_str (err));
+ }
+
+ err = td_thr_get_info_p (msg.th_p, &ti);
+ if (err != TD_OK)
+ error ("Cannot get thread info: %s", thread_db_err_str (err));
+
+ ptid = BUILD_THREAD (ti.ti_tid, GET_PID (ptid));
+
+ switch (msg.event)
+ {
+ case TD_CREATE:
+ /* Call attach_thread whether or not we already know about a
+ thread with this thread ID. */
+ attach_thread (ptid, msg.th_p, &ti, 1);
+
+ break;
+
+ case TD_DEATH:
+
+ if (!in_thread_list (ptid))
+ error ("Spurious thread death event.");
+
+ detach_thread (ptid, 1);
+
+ break;
+
+ default:
+ error ("Spurious thread event.");
+ }
+ }
+ while (loop);
+}
+
+static ptid_t
+thread_db_wait (ptid_t ptid, struct target_waitstatus *ourstatus)
+{
+ extern ptid_t trap_ptid;
+
+ if (GET_PID (ptid) != -1 && is_thread (ptid))
+ ptid = lwp_from_thread (ptid);
+
+ ptid = target_beneath->to_wait (ptid, ourstatus);
+
+ if (proc_handle.pid == 0)
+ /* The current child process isn't the actual multi-threaded
+ program yet, so don't try to do any special thread-specific
+ post-processing and bail out early. */
+ return ptid;
+
+ if (ourstatus->kind == TARGET_WAITKIND_EXITED)
+ return pid_to_ptid (-1);
+
+ if (ourstatus->kind == TARGET_WAITKIND_STOPPED
+ && ourstatus->value.sig == TARGET_SIGNAL_TRAP)
+ /* Check for a thread event. */
+ check_event (ptid);
+
+ if (!ptid_equal (trap_ptid, null_ptid))
+ trap_ptid = thread_from_lwp (trap_ptid);
+
+ /* Change the ptid back into the higher level PID + TID format.
+ If 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 event
+ gets postponed by other simultaneous events. In such a case,
+ we want to just ignore the event and continue on. */
+ ptid = thread_from_lwp (ptid);
+ if (GET_PID (ptid) == -1)
+ ourstatus->kind = TARGET_WAITKIND_SPURIOUS;
+
+ return ptid;
+}
+
+static int
+thread_db_xfer_memory (CORE_ADDR memaddr, char *myaddr, int len, int write,
+ struct mem_attrib *attrib, struct target_ops *target)
+{
+ struct cleanup *old_chain = save_inferior_ptid ();
+ int xfer;
+
+ if (is_thread (inferior_ptid))
+ {
+ /* FIXME: This seems to be necessary to make sure breakpoints
+ are removed. */
+ if (!target_thread_alive (inferior_ptid))
+ inferior_ptid = pid_to_ptid (GET_PID (inferior_ptid));
+ else
+ inferior_ptid = lwp_from_thread (inferior_ptid);
+ }
+
+ xfer =
+ target_beneath->deprecated_xfer_memory (memaddr, myaddr, len, write,
+ attrib, target);
+
+ do_cleanups (old_chain);
+ return xfer;
+}
+
+static void
+thread_db_fetch_registers (int regno)
+{
+ struct thread_info *thread_info;
+ prgregset_t gregset;
+ gdb_prfpregset_t fpregset;
+ td_err_e err;
+
+ if (!is_thread (inferior_ptid))
+ {
+ /* Pass the request to the target beneath us. */
+ target_beneath->to_fetch_registers (regno);
+ return;
+ }
+
+ thread_info = find_thread_pid (inferior_ptid);
+ thread_db_map_id2thr (thread_info, 1);
+
+ err = td_thr_getgregs_p (&thread_info->private->th, gregset);
+ if (err != TD_OK)
+ error ("Cannot fetch general-purpose registers for thread %ld: %s",
+ (long) GET_THREAD (inferior_ptid), thread_db_err_str (err));
+
+ err = td_thr_getfpregs_p (&thread_info->private->th, &fpregset);
+ if (err != TD_OK)
+ error ("Cannot get floating-point registers for thread %ld: %s",
+ (long) GET_THREAD (inferior_ptid), thread_db_err_str (err));
+
+ /* Note that we must call supply_gregset after calling the thread_db
+ routines because the thread_db routines call ps_lgetgregs and
+ friends which clobber GDB's register cache. */
+ supply_gregset ((gdb_gregset_t *) gregset);
+ supply_fpregset (&fpregset);
+}
+
+static void
+thread_db_store_registers (int regno)
+{
+ prgregset_t gregset;
+ gdb_prfpregset_t fpregset;
+ td_err_e err;
+ struct thread_info *thread_info;
+
+ if (!is_thread (inferior_ptid))
+ {
+ /* Pass the request to the target beneath us. */
+ target_beneath->to_store_registers (regno);
+ return;
+ }
+
+ thread_info = find_thread_pid (inferior_ptid);
+ thread_db_map_id2thr (thread_info, 1);
+
+ if (regno != -1)
+ {
+ char raw[MAX_REGISTER_SIZE];
+
+ deprecated_read_register_gen (regno, raw);
+ thread_db_fetch_registers (-1);
+ regcache_raw_supply (current_regcache, regno, raw);
+ }
+
+ fill_gregset ((gdb_gregset_t *) gregset, -1);
+ fill_fpregset (&fpregset, -1);
+
+ err = td_thr_setgregs_p (&thread_info->private->th, gregset);
+ if (err != TD_OK)
+ error ("Cannot store general-purpose registers for thread %ld: %s",
+ (long) GET_THREAD (inferior_ptid), thread_db_err_str (err));
+ err = td_thr_setfpregs_p (&thread_info->private->th, &fpregset);
+ if (err != TD_OK)
+ error ("Cannot store floating-point registers for thread %ld: %s",
+ (long) GET_THREAD (inferior_ptid), thread_db_err_str (err));
+}
+
+static void
+thread_db_kill (void)
+{
+ /* There's no need to save & restore inferior_ptid here, since the
+ inferior isn't supposed to survive this function call. */
+ inferior_ptid = lwp_from_thread (inferior_ptid);
+ target_beneath->to_kill ();
+}
+
+static void
+thread_db_create_inferior (char *exec_file, char *allargs, char **env,
+ int from_tty)
+{
+ unpush_target (&thread_db_ops);
+ using_thread_db = 0;
+ target_beneath->to_create_inferior (exec_file, allargs, env, from_tty);
+}
+
+static void
+thread_db_post_startup_inferior (ptid_t ptid)
+{
+ if (proc_handle.pid == 0)
+ {
+ /* The child process is now the actual multi-threaded
+ program. Snatch its process ID... */
+ proc_handle.pid = GET_PID (ptid);
+
+ /* ...and perform the remaining initialization steps. */
+ enable_thread_event_reporting ();
+ thread_db_find_new_threads ();
+ }
+}
+
+static void
+thread_db_mourn_inferior (void)
+{
+ remove_thread_event_breakpoints ();
+
+ /* Forget about the child's process ID. We shouldn't need it
+ anymore. */
+ proc_handle.pid = 0;
+
+ target_beneath->to_mourn_inferior ();
+
+ /* Detach thread_db target ops. */
+ unpush_target (&thread_db_ops);
+ using_thread_db = 0;
+}
+
+static int
+thread_db_thread_alive (ptid_t ptid)
+{
+ td_thrhandle_t th;
+ td_err_e err;
+
+ if (is_thread (ptid))
+ {
+ struct thread_info *thread_info;
+ thread_info = find_thread_pid (ptid);
+
+ thread_db_map_id2thr (thread_info, 0);
+ if (!thread_info->private->th_valid)
+ return 0;
+
+ err = td_thr_validate_p (&thread_info->private->th);
+ if (err != TD_OK)
+ return 0;
+
+ if (!thread_info->private->ti_valid)
+ {
+ err =
+ td_thr_get_info_p (&thread_info->private->th,
+ &thread_info->private->ti);
+ if (err != TD_OK)
+ return 0;
+ thread_info->private->ti_valid = 1;
+ }
+
+ if (thread_info->private->ti.ti_state == TD_THR_UNKNOWN
+ || thread_info->private->ti.ti_state == TD_THR_ZOMBIE)
+ return 0; /* A zombie thread. */
+
+ return 1;
+ }
+
+ if (target_beneath->to_thread_alive)
+ return target_beneath->to_thread_alive (ptid);
+
+ return 0;
+}
+
+static int
+find_new_threads_callback (const td_thrhandle_t *th_p, void *data)
+{
+ td_thrinfo_t ti;
+ td_err_e err;
+ ptid_t ptid;
+
+ err = td_thr_get_info_p (th_p, &ti);
+ if (err != TD_OK)
+ error ("find_new_threads_callback: cannot get thread info: %s",
+ thread_db_err_str (err));
+
+ if (ti.ti_state == TD_THR_UNKNOWN || ti.ti_state == TD_THR_ZOMBIE)
+ return 0; /* A zombie -- ignore. */
+
+ ptid = BUILD_THREAD (ti.ti_tid, GET_PID (inferior_ptid));
+
+ if (!in_thread_list (ptid))
+ attach_thread (ptid, th_p, &ti, 1);
+
+ return 0;
+}
+
+static void
+thread_db_find_new_threads (void)
+{
+ td_err_e err;
+
+ /* Iterate over all user-space threads to discover new threads. */
+ err = td_ta_thr_iter_p (thread_agent, find_new_threads_callback, NULL,
+ TD_THR_ANY_STATE, TD_THR_LOWEST_PRIORITY,
+ TD_SIGNO_MASK, TD_THR_ANY_USER_FLAGS);
+ if (err != TD_OK)
+ error ("Cannot find new threads: %s", thread_db_err_str (err));
+}
+
+static char *
+thread_db_pid_to_str (ptid_t ptid)
+{
+ if (is_thread (ptid))
+ {
+ static char buf[64];
+ td_thrinfo_t *ti_p;
+ td_err_e err;
+ struct thread_info *thread_info;
+
+ thread_info = find_thread_pid (ptid);
+ thread_db_map_id2thr (thread_info, 0);
+ if (!thread_info->private->th_valid)
+ {
+ snprintf (buf, sizeof (buf), "Thread %ld (Missing)",
+ GET_THREAD (ptid));
+ return buf;
+ }
+
+ ti_p = thread_db_get_info (thread_info);
+
+ if (ti_p->ti_state == TD_THR_ACTIVE && ti_p->ti_lid != 0)
+ {
+ snprintf (buf, sizeof (buf), "Thread %ld (LWP %d)",
+ (long) ti_p->ti_tid, ti_p->ti_lid);
+ }
+ else
+ {
+ snprintf (buf, sizeof (buf), "Thread %ld (%s)",
+ (long) ti_p->ti_tid,
+ thread_db_state_str (ti_p->ti_state));
+ }
+
+ return buf;
+ }
+
+ if (target_beneath->to_pid_to_str (ptid))
+ return target_beneath->to_pid_to_str (ptid);
+
+ return normal_pid_to_str (ptid);
+}
+
+/* Get the address of the thread local variable in OBJFILE which is
+ stored at OFFSET within the thread local storage for thread PTID. */
+
+static CORE_ADDR
+thread_db_get_thread_local_address (ptid_t ptid, struct objfile *objfile,
+ CORE_ADDR offset)
+{
+ if (is_thread (ptid))
+ {
+ int objfile_is_library = (objfile->flags & OBJF_SHARED);
+ td_err_e err;
+ void *address;
+ CORE_ADDR lm;
+ struct thread_info *thread_info;
+
+ /* glibc doesn't provide the needed interface. */
+ if (!td_thr_tls_get_addr_p)
+ error ("Cannot find thread-local variables in this thread library.");
+
+ /* Get the address of the link map for this objfile. */
+ lm = svr4_fetch_objfile_link_map (objfile);
+
+ /* Whoops, we couldn't find one. Bail out. */
+ if (!lm)
+ {
+ if (objfile_is_library)
+ error ("Cannot find shared library `%s' link_map in dynamic"
+ " linker's module list", objfile->name);
+ else
+ error ("Cannot find executable file `%s' link_map in dynamic"
+ " linker's module list", objfile->name);
+ }
+
+ /* Get info about the thread. */
+ thread_info = find_thread_pid (ptid);
+ thread_db_map_id2thr (thread_info, 1);
+
+ /* Finally, get the address of the variable. */
+ err = td_thr_tls_get_addr_p (&thread_info->private->th, (void *) lm,
+ offset, &address);
+
+#ifdef THREAD_DB_HAS_TD_NOTALLOC
+ /* The memory hasn't been allocated, yet. */
+ if (err == TD_NOTALLOC)
+ {
+ /* Now, if libthread_db provided the initialization image's
+ address, we *could* try to build a non-lvalue value from
+ the initialization image. */
+ if (objfile_is_library)
+ error ("The inferior has not yet allocated storage for"
+ " thread-local variables in\n"
+ "the shared library `%s'\n"
+ "for the thread %ld",
+ objfile->name, (long) GET_THREAD (ptid));
+ else
+ error ("The inferior has not yet allocated storage for"
+ " thread-local variables in\n"
+ "the executable `%s'\n"
+ "for the thread %ld",
+ objfile->name, (long) GET_THREAD (ptid));
+ }
+#endif
+
+ /* Something else went wrong. */
+ if (err != TD_OK)
+ {
+ if (objfile_is_library)
+ error ("Cannot find thread-local storage for thread %ld, "
+ "shared library %s:\n%s",
+ (long) GET_THREAD (ptid),
+ objfile->name, thread_db_err_str (err));
+ else
+ error ("Cannot find thread-local storage for thread %ld, "
+ "executable file %s:\n%s",
+ (long) GET_THREAD (ptid),
+ objfile->name, thread_db_err_str (err));
+ }
+
+ /* Cast assuming host == target. Joy. */
+ return (CORE_ADDR) address;
+ }
+
+ if (target_beneath->to_get_thread_local_address)
+ return target_beneath->to_get_thread_local_address (ptid, objfile,
+ offset);
+
+ error ("Cannot find thread-local values on this target.");
+}
+
+static void
+init_thread_db_ops (void)
+{
+ thread_db_ops.to_shortname = "multi-thread";
+ thread_db_ops.to_longname = "multi-threaded child process.";
+ thread_db_ops.to_doc = "Threads and pthreads support.";
+ thread_db_ops.to_attach = thread_db_attach;
+ thread_db_ops.to_detach = thread_db_detach;
+ thread_db_ops.to_resume = thread_db_resume;
+ thread_db_ops.to_wait = thread_db_wait;
+ thread_db_ops.to_fetch_registers = thread_db_fetch_registers;
+ thread_db_ops.to_store_registers = thread_db_store_registers;
+ thread_db_ops.deprecated_xfer_memory = thread_db_xfer_memory;
+ thread_db_ops.to_kill = thread_db_kill;
+ thread_db_ops.to_create_inferior = thread_db_create_inferior;
+ thread_db_ops.to_post_startup_inferior = thread_db_post_startup_inferior;
+ thread_db_ops.to_mourn_inferior = thread_db_mourn_inferior;
+ thread_db_ops.to_thread_alive = thread_db_thread_alive;
+ 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_stratum = thread_stratum;
+ thread_db_ops.to_has_thread_control = tc_schedlock;
+ thread_db_ops.to_get_thread_local_address
+ = thread_db_get_thread_local_address;
+ thread_db_ops.to_magic = OPS_MAGIC;
+}
+
+void
+_initialize_thread_db (void)
+{
+ /* Only initialize the module if we can load libthread_db. */
+ if (thread_db_load ())
+ {
+ init_thread_db_ops ();
+ add_target (&thread_db_ops);
+
+ /* Add ourselves to objfile event chain. */
+ target_new_objfile_chain = deprecated_target_new_objfile_hook;
+ deprecated_target_new_objfile_hook = thread_db_new_objfile;
+ }
+}
+++ /dev/null
-/* libthread_db assisted debugging support, generic parts.
-
- Copyright 1999, 2000, 2001, 2003, 2004 Free Software Foundation, Inc.
-
- This file is part of GDB.
-
- 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
- the Free Software Foundation; either version 2 of the License, or
- (at your option) any later version.
-
- This program is distributed in the hope that it will be useful,
- but WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- GNU General Public License for more details.
-
- You should have received a copy of the GNU General Public License
- along with this program; if not, write to the Free Software
- Foundation, Inc., 59 Temple Place - Suite 330,
- Boston, MA 02111-1307, USA. */
-
-#include "defs.h"
-
-#include "gdb_assert.h"
-#include <dlfcn.h>
-#include "gdb_proc_service.h"
-#include "gdb_thread_db.h"
-
-#include "bfd.h"
-#include "gdbthread.h"
-#include "inferior.h"
-#include "symfile.h"
-#include "objfiles.h"
-#include "target.h"
-#include "regcache.h"
-#include "solib-svr4.h"
-
-#ifdef HAVE_GNU_LIBC_VERSION_H
-#include <gnu/libc-version.h>
-#endif
-
-#ifndef LIBTHREAD_DB_SO
-#define LIBTHREAD_DB_SO "libthread_db.so.1"
-#endif
-
-/* If we're running on GNU/Linux, we must explicitly attach to any new
- threads. */
-
-/* FIXME: There is certainly some room for improvements:
- - Cache LWP ids.
- - Bypass libthread_db when fetching or storing registers for
- threads bound to a LWP. */
-
-/* This module's target vector. */
-static struct target_ops thread_db_ops;
-
-/* The target vector that we call for things this module can't handle. */
-static struct target_ops *target_beneath;
-
-/* Pointer to the next function on the objfile event chain. */
-static void (*target_new_objfile_chain) (struct objfile * objfile);
-
-/* Non-zero if we're using this module's target vector. */
-static int using_thread_db;
-
-/* Non-zero if we have determined the signals used by the threads
- library. */
-static int thread_signals;
-static sigset_t thread_stop_set;
-static sigset_t thread_print_set;
-
-/* Structure that identifies the child process for the
- <proc_service.h> interface. */
-static struct ps_prochandle proc_handle;
-
-/* Connection to the libthread_db library. */
-static td_thragent_t *thread_agent;
-
-/* Pointers to the libthread_db functions. */
-
-static td_err_e (*td_init_p) (void);
-
-static td_err_e (*td_ta_new_p) (struct ps_prochandle * ps,
- td_thragent_t **ta);
-static td_err_e (*td_ta_map_id2thr_p) (const td_thragent_t *ta, thread_t pt,
- td_thrhandle_t *__th);
-static td_err_e (*td_ta_map_lwp2thr_p) (const td_thragent_t *ta,
- lwpid_t lwpid, td_thrhandle_t *th);
-static td_err_e (*td_ta_thr_iter_p) (const td_thragent_t *ta,
- td_thr_iter_f *callback, void *cbdata_p,
- td_thr_state_e state, int ti_pri,
- sigset_t *ti_sigmask_p,
- unsigned int ti_user_flags);
-static td_err_e (*td_ta_event_addr_p) (const td_thragent_t *ta,
- td_event_e event, td_notify_t *ptr);
-static td_err_e (*td_ta_set_event_p) (const td_thragent_t *ta,
- td_thr_events_t *event);
-static td_err_e (*td_ta_event_getmsg_p) (const td_thragent_t *ta,
- td_event_msg_t *msg);
-
-static td_err_e (*td_thr_validate_p) (const td_thrhandle_t *th);
-static td_err_e (*td_thr_get_info_p) (const td_thrhandle_t *th,
- td_thrinfo_t *infop);
-static td_err_e (*td_thr_getfpregs_p) (const td_thrhandle_t *th,
- gdb_prfpregset_t *regset);
-static td_err_e (*td_thr_getgregs_p) (const td_thrhandle_t *th,
- prgregset_t gregs);
-static td_err_e (*td_thr_setfpregs_p) (const td_thrhandle_t *th,
- const gdb_prfpregset_t *fpregs);
-static td_err_e (*td_thr_setgregs_p) (const td_thrhandle_t *th,
- prgregset_t gregs);
-static td_err_e (*td_thr_event_enable_p) (const td_thrhandle_t *th,
- int event);
-
-static td_err_e (*td_thr_tls_get_addr_p) (const td_thrhandle_t *th,
- void *map_address,
- size_t offset, void **address);
-
-/* Location of the thread creation event breakpoint. The code at this
- location in the child process will be called by the pthread library
- whenever a new thread is created. By setting a special breakpoint
- at this location, GDB can detect when a new thread is created. We
- obtain this location via the td_ta_event_addr call. */
-static CORE_ADDR td_create_bp_addr;
-
-/* Location of the thread death event breakpoint. */
-static CORE_ADDR td_death_bp_addr;
-
-/* Prototypes for local functions. */
-static void thread_db_find_new_threads (void);
-static void attach_thread (ptid_t ptid, const td_thrhandle_t *th_p,
- const td_thrinfo_t *ti_p, int verbose);
-static void detach_thread (ptid_t ptid, int verbose);
-\f
-
-/* Building process ids. */
-
-#define GET_PID(ptid) ptid_get_pid (ptid)
-#define GET_LWP(ptid) ptid_get_lwp (ptid)
-#define GET_THREAD(ptid) ptid_get_tid (ptid)
-
-#define is_lwp(ptid) (GET_LWP (ptid) != 0)
-#define is_thread(ptid) (GET_THREAD (ptid) != 0)
-
-#define BUILD_LWP(lwp, pid) ptid_build (pid, lwp, 0)
-#define BUILD_THREAD(tid, pid) ptid_build (pid, 0, tid)
-\f
-
-/* Use "struct private_thread_info" to cache thread state. This is
- a substantial optimization. */
-
-struct private_thread_info
-{
- /* Flag set when we see a TD_DEATH event for this thread. */
- unsigned int dying:1;
-
- /* Cached thread state. */
- unsigned int th_valid:1;
- unsigned int ti_valid:1;
-
- td_thrhandle_t th;
- td_thrinfo_t ti;
-};
-\f
-
-static char *
-thread_db_err_str (td_err_e err)
-{
- static char buf[64];
-
- switch (err)
- {
- case TD_OK:
- return "generic 'call succeeded'";
- case TD_ERR:
- return "generic error";
- case TD_NOTHR:
- return "no thread to satisfy query";
- case TD_NOSV:
- return "no sync handle to satisfy query";
- case TD_NOLWP:
- return "no LWP to satisfy query";
- case TD_BADPH:
- return "invalid process handle";
- case TD_BADTH:
- return "invalid thread handle";
- case TD_BADSH:
- return "invalid synchronization handle";
- case TD_BADTA:
- return "invalid thread agent";
- case TD_BADKEY:
- return "invalid key";
- case TD_NOMSG:
- return "no event message for getmsg";
- case TD_NOFPREGS:
- return "FPU register set not available";
- case TD_NOLIBTHREAD:
- return "application not linked with libthread";
- case TD_NOEVENT:
- return "requested event is not supported";
- case TD_NOCAPAB:
- return "capability not available";
- case TD_DBERR:
- return "debugger service failed";
- case TD_NOAPLIC:
- return "operation not applicable to";
- case TD_NOTSD:
- return "no thread-specific data for this thread";
- case TD_MALLOC:
- return "malloc failed";
- case TD_PARTIALREG:
- return "only part of register set was written/read";
- case TD_NOXREGS:
- return "X register set not available for this thread";
- default:
- snprintf (buf, sizeof (buf), "unknown thread_db error '%d'", err);
- return buf;
- }
-}
-
-static char *
-thread_db_state_str (td_thr_state_e state)
-{
- static char buf[64];
-
- switch (state)
- {
- case TD_THR_STOPPED:
- return "stopped by debugger";
- case TD_THR_RUN:
- return "runnable";
- case TD_THR_ACTIVE:
- return "active";
- case TD_THR_ZOMBIE:
- return "zombie";
- case TD_THR_SLEEP:
- return "sleeping";
- case TD_THR_STOPPED_ASLEEP:
- return "stopped by debugger AND blocked";
- default:
- snprintf (buf, sizeof (buf), "unknown thread_db state %d", state);
- return buf;
- }
-}
-\f
-/* A callback function for td_ta_thr_iter, which we use to map all
- threads to LWPs.
-
- THP is a handle to the current thread; if INFOP is not NULL, the
- struct thread_info associated with this thread is returned in
- *INFOP.
-
- If the thread is a zombie, TD_THR_ZOMBIE is returned. Otherwise,
- zero is returned to indicate success. */
-
-static int
-thread_get_info_callback (const td_thrhandle_t *thp, void *infop)
-{
- td_thrinfo_t ti;
- td_err_e err;
- struct thread_info *thread_info;
- ptid_t thread_ptid;
-
- err = td_thr_get_info_p (thp, &ti);
- if (err != TD_OK)
- error ("thread_get_info_callback: cannot get thread info: %s",
- thread_db_err_str (err));
-
- /* Fill the cache. */
- thread_ptid = BUILD_THREAD (ti.ti_tid, GET_PID (inferior_ptid));
- thread_info = find_thread_pid (thread_ptid);
-
- /* In the case of a zombie thread, don't continue. We don't want to
- attach to it thinking it is a new thread. */
- if (ti.ti_state == TD_THR_UNKNOWN || ti.ti_state == TD_THR_ZOMBIE)
- {
- if (infop != NULL)
- *(struct thread_info **) infop = thread_info;
- if (thread_info != NULL)
- {
- memcpy (&thread_info->private->th, thp, sizeof (*thp));
- thread_info->private->th_valid = 1;
- memcpy (&thread_info->private->ti, &ti, sizeof (ti));
- thread_info->private->ti_valid = 1;
- }
- return TD_THR_ZOMBIE;
- }
-
- if (thread_info == NULL)
- {
- /* New thread. Attach to it now (why wait?). */
- attach_thread (thread_ptid, thp, &ti, 1);
- thread_info = find_thread_pid (thread_ptid);
- gdb_assert (thread_info != NULL);
- }
-
- memcpy (&thread_info->private->th, thp, sizeof (*thp));
- thread_info->private->th_valid = 1;
- memcpy (&thread_info->private->ti, &ti, sizeof (ti));
- thread_info->private->ti_valid = 1;
-
- if (infop != NULL)
- *(struct thread_info **) infop = thread_info;
-
- return 0;
-}
-
-/* Accessor functions for the thread_db information, with caching. */
-
-static void
-thread_db_map_id2thr (struct thread_info *thread_info, int fatal)
-{
- td_err_e err;
-
- if (thread_info->private->th_valid)
- return;
-
- err = td_ta_map_id2thr_p (thread_agent, GET_THREAD (thread_info->ptid),
- &thread_info->private->th);
- if (err != TD_OK)
- {
- if (fatal)
- error ("Cannot find thread %ld: %s",
- (long) GET_THREAD (thread_info->ptid),
- thread_db_err_str (err));
- }
- else
- thread_info->private->th_valid = 1;
-}
-
-static td_thrinfo_t *
-thread_db_get_info (struct thread_info *thread_info)
-{
- td_err_e err;
-
- if (thread_info->private->ti_valid)
- return &thread_info->private->ti;
-
- if (!thread_info->private->th_valid)
- thread_db_map_id2thr (thread_info, 1);
-
- err =
- td_thr_get_info_p (&thread_info->private->th, &thread_info->private->ti);
- if (err != TD_OK)
- error ("thread_db_get_info: cannot get thread info: %s",
- thread_db_err_str (err));
-
- thread_info->private->ti_valid = 1;
- return &thread_info->private->ti;
-}
-\f
-/* Convert between user-level thread ids and LWP ids. */
-
-static ptid_t
-thread_from_lwp (ptid_t ptid)
-{
- td_thrhandle_t th;
- td_err_e err;
- struct thread_info *thread_info;
- ptid_t thread_ptid;
-
- if (GET_LWP (ptid) == 0)
- ptid = BUILD_LWP (GET_PID (ptid), GET_PID (ptid));
-
- gdb_assert (is_lwp (ptid));
-
- err = td_ta_map_lwp2thr_p (thread_agent, GET_LWP (ptid), &th);
- if (err != TD_OK)
- error ("Cannot find user-level thread for LWP %ld: %s",
- GET_LWP (ptid), thread_db_err_str (err));
-
- thread_info = NULL;
-
- /* Fetch the thread info. If we get back TD_THR_ZOMBIE, then the
- event thread has already died. If another gdb interface has called
- 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
- to avoid the possibility of later treating it as a newly
- 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
- dead thread. */
- if (thread_get_info_callback (&th, &thread_info) == TD_THR_ZOMBIE
- && thread_info == NULL)
- return pid_to_ptid (-1);
-
- gdb_assert (thread_info && thread_info->private->ti_valid);
-
- return BUILD_THREAD (thread_info->private->ti.ti_tid, GET_PID (ptid));
-}
-
-static ptid_t
-lwp_from_thread (ptid_t ptid)
-{
- struct thread_info *thread_info;
- ptid_t thread_ptid;
-
- if (!is_thread (ptid))
- return ptid;
-
- thread_info = find_thread_pid (ptid);
- thread_db_get_info (thread_info);
-
- return BUILD_LWP (thread_info->private->ti.ti_lid, GET_PID (ptid));
-}
-\f
-
-void
-thread_db_init (struct target_ops *target)
-{
- target_beneath = target;
-}
-
-static void *
-verbose_dlsym (void *handle, const char *name)
-{
- void *sym = dlsym (handle, name);
- if (sym == NULL)
- warning ("Symbol \"%s\" not found in libthread_db: %s", name, dlerror ());
- return sym;
-}
-
-static int
-thread_db_load (void)
-{
- void *handle;
- td_err_e err;
-
- handle = dlopen (LIBTHREAD_DB_SO, RTLD_NOW);
- if (handle == NULL)
- {
- fprintf_filtered (gdb_stderr, "\n\ndlopen failed on '%s' - %s\n",
- LIBTHREAD_DB_SO, dlerror ());
- fprintf_filtered (gdb_stderr,
- "GDB will not be able to debug pthreads.\n\n");
- return 0;
- }
-
- /* Initialize pointers to the dynamic library functions we will use.
- Essential functions first. */
-
- td_init_p = verbose_dlsym (handle, "td_init");
- if (td_init_p == NULL)
- return 0;
-
- td_ta_new_p = verbose_dlsym (handle, "td_ta_new");
- if (td_ta_new_p == NULL)
- return 0;
-
- td_ta_map_id2thr_p = verbose_dlsym (handle, "td_ta_map_id2thr");
- if (td_ta_map_id2thr_p == NULL)
- return 0;
-
- td_ta_map_lwp2thr_p = verbose_dlsym (handle, "td_ta_map_lwp2thr");
- if (td_ta_map_lwp2thr_p == NULL)
- return 0;
-
- td_ta_thr_iter_p = verbose_dlsym (handle, "td_ta_thr_iter");
- if (td_ta_thr_iter_p == NULL)
- return 0;
-
- td_thr_validate_p = verbose_dlsym (handle, "td_thr_validate");
- if (td_thr_validate_p == NULL)
- return 0;
-
- td_thr_get_info_p = verbose_dlsym (handle, "td_thr_get_info");
- if (td_thr_get_info_p == NULL)
- return 0;
-
- td_thr_getfpregs_p = verbose_dlsym (handle, "td_thr_getfpregs");
- if (td_thr_getfpregs_p == NULL)
- return 0;
-
- td_thr_getgregs_p = verbose_dlsym (handle, "td_thr_getgregs");
- if (td_thr_getgregs_p == NULL)
- return 0;
-
- td_thr_setfpregs_p = verbose_dlsym (handle, "td_thr_setfpregs");
- if (td_thr_setfpregs_p == NULL)
- return 0;
-
- td_thr_setgregs_p = verbose_dlsym (handle, "td_thr_setgregs");
- if (td_thr_setgregs_p == NULL)
- return 0;
-
- /* Initialize the library. */
- err = td_init_p ();
- if (err != TD_OK)
- {
- warning ("Cannot initialize libthread_db: %s", thread_db_err_str (err));
- return 0;
- }
-
- /* These are not essential. */
- td_ta_event_addr_p = dlsym (handle, "td_ta_event_addr");
- td_ta_set_event_p = dlsym (handle, "td_ta_set_event");
- td_ta_event_getmsg_p = dlsym (handle, "td_ta_event_getmsg");
- td_thr_event_enable_p = dlsym (handle, "td_thr_event_enable");
- td_thr_tls_get_addr_p = dlsym (handle, "td_thr_tls_get_addr");
-
- return 1;
-}
-
-static td_err_e
-enable_thread_event (td_thragent_t *thread_agent, int event, CORE_ADDR *bp)
-{
- td_notify_t notify;
- td_err_e err;
-
- /* Get the breakpoint address for thread EVENT. */
- err = td_ta_event_addr_p (thread_agent, event, ¬ify);
- if (err != TD_OK)
- return err;
-
- /* Set up the breakpoint. */
- (*bp) = gdbarch_convert_from_func_ptr_addr (current_gdbarch,
- (CORE_ADDR) notify.u.bptaddr,
- ¤t_target);
- create_thread_event_breakpoint ((*bp));
-
- return TD_OK;
-}
-
-static void
-enable_thread_event_reporting (void)
-{
- td_thr_events_t events;
- td_notify_t notify;
- td_err_e err;
-#ifdef HAVE_GNU_LIBC_VERSION_H
- const char *libc_version;
- int libc_major, libc_minor;
-#endif
-
- /* We cannot use the thread event reporting facility if these
- functions aren't available. */
- 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)
- return;
-
- /* Set the process wide mask saying which events we're interested in. */
- td_event_emptyset (&events);
- td_event_addset (&events, TD_CREATE);
-
-#ifdef HAVE_GNU_LIBC_VERSION_H
- /* FIXME: kettenis/2000-04-23: The event reporting facility is
- broken for TD_DEATH events in glibc 2.1.3, so don't enable it for
- now. */
- libc_version = gnu_get_libc_version ();
- if (sscanf (libc_version, "%d.%d", &libc_major, &libc_minor) == 2
- && (libc_major > 2 || (libc_major == 2 && libc_minor > 1)))
-#endif
- td_event_addset (&events, TD_DEATH);
-
- err = td_ta_set_event_p (thread_agent, &events);
- if (err != TD_OK)
- {
- warning ("Unable to set global thread event mask: %s",
- thread_db_err_str (err));
- return;
- }
-
- /* Delete previous thread event breakpoints, if any. */
- remove_thread_event_breakpoints ();
- td_create_bp_addr = 0;
- td_death_bp_addr = 0;
-
- /* Set up the thread creation event. */
- err = enable_thread_event (thread_agent, TD_CREATE, &td_create_bp_addr);
- if (err != TD_OK)
- {
- warning ("Unable to get location for thread creation breakpoint: %s",
- thread_db_err_str (err));
- return;
- }
-
- /* Set up the thread death event. */
- err = enable_thread_event (thread_agent, TD_DEATH, &td_death_bp_addr);
- if (err != TD_OK)
- {
- warning ("Unable to get location for thread death breakpoint: %s",
- thread_db_err_str (err));
- return;
- }
-}
-
-static void
-disable_thread_event_reporting (void)
-{
- td_thr_events_t events;
-
- /* Set the process wide mask saying we aren't interested in any
- events anymore. */
- td_event_emptyset (&events);
- td_ta_set_event_p (thread_agent, &events);
-
- /* Delete thread event breakpoints, if any. */
- remove_thread_event_breakpoints ();
- td_create_bp_addr = 0;
- td_death_bp_addr = 0;
-}
-
-static void
-check_thread_signals (void)
-{
-#ifdef GET_THREAD_SIGNALS
- if (!thread_signals)
- {
- sigset_t mask;
- int i;
-
- GET_THREAD_SIGNALS (&mask);
- sigemptyset (&thread_stop_set);
- sigemptyset (&thread_print_set);
-
- for (i = 1; i < NSIG; i++)
- {
- if (sigismember (&mask, i))
- {
- if (signal_stop_update (target_signal_from_host (i), 0))
- sigaddset (&thread_stop_set, i);
- if (signal_print_update (target_signal_from_host (i), 0))
- sigaddset (&thread_print_set, i);
- thread_signals = 1;
- }
- }
- }
-#endif
-}
-
-static void
-thread_db_new_objfile (struct objfile *objfile)
-{
- td_err_e err;
-
- /* First time through, report that libthread_db was successfuly
- loaded. Can't print this in in thread_db_load as, at that stage,
- the interpreter and it's console haven't started. The real
- problem here is that libthread_db is loaded too early - it should
- only be loaded when there is a program to debug. */
- {
- static int dejavu;
- if (!dejavu)
- {
- Dl_info info;
- const char *library = NULL;
- /* Try dladdr. */
- if (dladdr ((*td_ta_new_p), &info) != 0)
- library = info.dli_fname;
- /* Try dlinfo? */
- if (library == NULL)
- /* Paranoid - don't let a NULL path slip through. */
- library = LIBTHREAD_DB_SO;
- printf_unfiltered ("Using host libthread_db library \"%s\".\n",
- library);
- dejavu = 1;
- }
- }
-
- /* Don't attempt to use thread_db on targets which can not run
- (core files). */
- if (objfile == NULL || !target_has_execution)
- {
- /* All symbols have been discarded. If the thread_db target is
- active, deactivate it now. */
- if (using_thread_db)
- {
- gdb_assert (proc_handle.pid == 0);
- unpush_target (&thread_db_ops);
- using_thread_db = 0;
- }
-
- goto quit;
- }
-
- if (using_thread_db)
- /* Nothing to do. The thread library was already detected and the
- target vector was already activated. */
- goto quit;
-
- /* Initialize the structure that identifies the child process. Note
- that at this point there is no guarantee that we actually have a
- child process. */
- proc_handle.pid = GET_PID (inferior_ptid);
-
- /* Now attempt to open a connection to the thread library. */
- err = td_ta_new_p (&proc_handle, &thread_agent);
- switch (err)
- {
- case TD_NOLIBTHREAD:
- /* No thread library was detected. */
- break;
-
- case TD_OK:
- printf_unfiltered ("[Thread debugging using libthread_db enabled]\n");
-
- /* The thread library was detected. Activate the thread_db target. */
- push_target (&thread_db_ops);
- using_thread_db = 1;
-
- enable_thread_event_reporting ();
- thread_db_find_new_threads ();
- break;
-
- default:
- warning ("Cannot initialize thread debugging library: %s",
- thread_db_err_str (err));
- break;
- }
-
-quit:
- if (target_new_objfile_chain)
- target_new_objfile_chain (objfile);
-}
-
-/* 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
- that wasn't already in our list. */
-
-static void
-attach_thread (ptid_t ptid, const td_thrhandle_t *th_p,
- const td_thrinfo_t *ti_p, int verbose)
-{
- struct thread_info *tp;
- td_err_e err;
-
- /* 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
- may have iterated over all threads between the thread creation
- and the TD_CREATE event, for instance when the user has issued
- the `info threads' command before the SIGTRAP for hitting the
- thread creation breakpoint was reported. Alternatively, the
- 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
- the second case we should discard information about the dead
- thread and attach to the new one. */
- if (in_thread_list (ptid))
- {
- tp = find_thread_pid (ptid);
- gdb_assert (tp != NULL);
-
- if (!tp->private->dying)
- return;
-
- delete_thread (ptid);
- }
-
- check_thread_signals ();
-
- /* Add the thread to GDB's thread list. */
- tp = add_thread (ptid);
- tp->private = xmalloc (sizeof (struct private_thread_info));
- memset (tp->private, 0, sizeof (struct private_thread_info));
-
- if (verbose)
- printf_unfiltered ("[New %s]\n", target_pid_to_str (ptid));
-
- if (ti_p->ti_state == TD_THR_UNKNOWN || ti_p->ti_state == TD_THR_ZOMBIE)
- return; /* A zombie thread -- do not attach. */
-
- /* Under GNU/Linux, we have to attach to each and every thread. */
-#ifdef ATTACH_LWP
- ATTACH_LWP (BUILD_LWP (ti_p->ti_lid, GET_PID (ptid)), 0);
-#endif
-
- /* Enable thread event reporting for this thread. */
- err = td_thr_event_enable_p (th_p, 1);
- if (err != TD_OK)
- error ("Cannot enable thread event reporting for %s: %s",
- target_pid_to_str (ptid), thread_db_err_str (err));
-}
-
-static void
-thread_db_attach (char *args, int from_tty)
-{
- target_beneath->to_attach (args, from_tty);
-
- /* Destroy thread info; it's no longer valid. */
- init_thread_list ();
-
- /* The child process is now the actual multi-threaded
- program. Snatch its process ID... */
- proc_handle.pid = GET_PID (inferior_ptid);
-
- /* ...and perform the remaining initialization steps. */
- enable_thread_event_reporting ();
- thread_db_find_new_threads ();
-}
-
-static void
-detach_thread (ptid_t ptid, int verbose)
-{
- struct thread_info *thread_info;
-
- if (verbose)
- printf_unfiltered ("[%s exited]\n", target_pid_to_str (ptid));
-
- /* Don't delete the thread now, because it still reports as active
- until it has executed a few instructions after the event
- 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
- 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
- something re-uses its thread ID. */
- thread_info = find_thread_pid (ptid);
- gdb_assert (thread_info != NULL);
- thread_info->private->dying = 1;
-}
-
-static void
-thread_db_detach (char *args, int from_tty)
-{
- disable_thread_event_reporting ();
-
- /* There's no need to save & restore inferior_ptid here, since the
- inferior is supposed to be survive this function call. */
- inferior_ptid = lwp_from_thread (inferior_ptid);
-
- /* Forget about the child's process ID. We shouldn't need it
- anymore. */
- proc_handle.pid = 0;
-
- target_beneath->to_detach (args, from_tty);
-}
-
-static int
-clear_lwpid_callback (struct thread_info *thread, void *dummy)
-{
- /* 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
- are always conservative. */
-
- thread->private->th_valid = 0;
- thread->private->ti_valid = 0;
-
- return 0;
-}
-
-static void
-thread_db_resume (ptid_t ptid, int step, enum target_signal signo)
-{
- struct cleanup *old_chain = save_inferior_ptid ();
-
- if (GET_PID (ptid) == -1)
- inferior_ptid = lwp_from_thread (inferior_ptid);
- else if (is_thread (ptid))
- ptid = lwp_from_thread (ptid);
-
- /* Clear cached data which may not be valid after the resume. */
- iterate_over_threads (clear_lwpid_callback, NULL);
-
- target_beneath->to_resume (ptid, step, signo);
-
- do_cleanups (old_chain);
-}
-
-/* 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
- the event. */
-
-static void
-check_event (ptid_t ptid)
-{
- td_event_msg_t msg;
- td_thrinfo_t ti;
- td_err_e err;
- CORE_ADDR stop_pc;
- int loop = 0;
-
- /* Bail out early if we're not at a thread event breakpoint. */
- stop_pc = read_pc_pid (ptid) - DECR_PC_AFTER_BREAK;
- if (stop_pc != td_create_bp_addr && stop_pc != td_death_bp_addr)
- return;
-
- /* 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.
- We have to call td_ta_event_getmsg() to get
- the latest message. Since we have no way of correlating whether
- the event message we get back corresponds to our breakpoint, we must
- loop and read all event messages, processing them appropriately.
- This guarantees we will process the correct message before continuing
- from the breakpoint.
-
- Currently, death events are not enabled. If they are enabled,
- the death event can use the td_thr_event_getmsg() interface to
- get the message specifically for that lwp and avoid looping
- below. */
-
- loop = 1;
-
- do
- {
- err = td_ta_event_getmsg_p (thread_agent, &msg);
- if (err != TD_OK)
- {
- if (err == TD_NOMSG)
- return;
-
- error ("Cannot get thread event message: %s",
- thread_db_err_str (err));
- }
-
- err = td_thr_get_info_p (msg.th_p, &ti);
- if (err != TD_OK)
- error ("Cannot get thread info: %s", thread_db_err_str (err));
-
- ptid = BUILD_THREAD (ti.ti_tid, GET_PID (ptid));
-
- switch (msg.event)
- {
- case TD_CREATE:
- /* Call attach_thread whether or not we already know about a
- thread with this thread ID. */
- attach_thread (ptid, msg.th_p, &ti, 1);
-
- break;
-
- case TD_DEATH:
-
- if (!in_thread_list (ptid))
- error ("Spurious thread death event.");
-
- detach_thread (ptid, 1);
-
- break;
-
- default:
- error ("Spurious thread event.");
- }
- }
- while (loop);
-}
-
-static ptid_t
-thread_db_wait (ptid_t ptid, struct target_waitstatus *ourstatus)
-{
- extern ptid_t trap_ptid;
-
- if (GET_PID (ptid) != -1 && is_thread (ptid))
- ptid = lwp_from_thread (ptid);
-
- ptid = target_beneath->to_wait (ptid, ourstatus);
-
- if (proc_handle.pid == 0)
- /* The current child process isn't the actual multi-threaded
- program yet, so don't try to do any special thread-specific
- post-processing and bail out early. */
- return ptid;
-
- if (ourstatus->kind == TARGET_WAITKIND_EXITED)
- return pid_to_ptid (-1);
-
- if (ourstatus->kind == TARGET_WAITKIND_STOPPED
- && ourstatus->value.sig == TARGET_SIGNAL_TRAP)
- /* Check for a thread event. */
- check_event (ptid);
-
- if (!ptid_equal (trap_ptid, null_ptid))
- trap_ptid = thread_from_lwp (trap_ptid);
-
- /* Change the ptid back into the higher level PID + TID format.
- If 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 event
- gets postponed by other simultaneous events. In such a case,
- we want to just ignore the event and continue on. */
- ptid = thread_from_lwp (ptid);
- if (GET_PID (ptid) == -1)
- ourstatus->kind = TARGET_WAITKIND_SPURIOUS;
-
- return ptid;
-}
-
-static int
-thread_db_xfer_memory (CORE_ADDR memaddr, char *myaddr, int len, int write,
- struct mem_attrib *attrib, struct target_ops *target)
-{
- struct cleanup *old_chain = save_inferior_ptid ();
- int xfer;
-
- if (is_thread (inferior_ptid))
- {
- /* FIXME: This seems to be necessary to make sure breakpoints
- are removed. */
- if (!target_thread_alive (inferior_ptid))
- inferior_ptid = pid_to_ptid (GET_PID (inferior_ptid));
- else
- inferior_ptid = lwp_from_thread (inferior_ptid);
- }
-
- xfer =
- target_beneath->deprecated_xfer_memory (memaddr, myaddr, len, write,
- attrib, target);
-
- do_cleanups (old_chain);
- return xfer;
-}
-
-static void
-thread_db_fetch_registers (int regno)
-{
- struct thread_info *thread_info;
- prgregset_t gregset;
- gdb_prfpregset_t fpregset;
- td_err_e err;
-
- if (!is_thread (inferior_ptid))
- {
- /* Pass the request to the target beneath us. */
- target_beneath->to_fetch_registers (regno);
- return;
- }
-
- thread_info = find_thread_pid (inferior_ptid);
- thread_db_map_id2thr (thread_info, 1);
-
- err = td_thr_getgregs_p (&thread_info->private->th, gregset);
- if (err != TD_OK)
- error ("Cannot fetch general-purpose registers for thread %ld: %s",
- (long) GET_THREAD (inferior_ptid), thread_db_err_str (err));
-
- err = td_thr_getfpregs_p (&thread_info->private->th, &fpregset);
- if (err != TD_OK)
- error ("Cannot get floating-point registers for thread %ld: %s",
- (long) GET_THREAD (inferior_ptid), thread_db_err_str (err));
-
- /* Note that we must call supply_gregset after calling the thread_db
- routines because the thread_db routines call ps_lgetgregs and
- friends which clobber GDB's register cache. */
- supply_gregset ((gdb_gregset_t *) gregset);
- supply_fpregset (&fpregset);
-}
-
-static void
-thread_db_store_registers (int regno)
-{
- prgregset_t gregset;
- gdb_prfpregset_t fpregset;
- td_err_e err;
- struct thread_info *thread_info;
-
- if (!is_thread (inferior_ptid))
- {
- /* Pass the request to the target beneath us. */
- target_beneath->to_store_registers (regno);
- return;
- }
-
- thread_info = find_thread_pid (inferior_ptid);
- thread_db_map_id2thr (thread_info, 1);
-
- if (regno != -1)
- {
- char raw[MAX_REGISTER_SIZE];
-
- deprecated_read_register_gen (regno, raw);
- thread_db_fetch_registers (-1);
- regcache_raw_supply (current_regcache, regno, raw);
- }
-
- fill_gregset ((gdb_gregset_t *) gregset, -1);
- fill_fpregset (&fpregset, -1);
-
- err = td_thr_setgregs_p (&thread_info->private->th, gregset);
- if (err != TD_OK)
- error ("Cannot store general-purpose registers for thread %ld: %s",
- (long) GET_THREAD (inferior_ptid), thread_db_err_str (err));
- err = td_thr_setfpregs_p (&thread_info->private->th, &fpregset);
- if (err != TD_OK)
- error ("Cannot store floating-point registers for thread %ld: %s",
- (long) GET_THREAD (inferior_ptid), thread_db_err_str (err));
-}
-
-static void
-thread_db_kill (void)
-{
- /* There's no need to save & restore inferior_ptid here, since the
- inferior isn't supposed to survive this function call. */
- inferior_ptid = lwp_from_thread (inferior_ptid);
- target_beneath->to_kill ();
-}
-
-static void
-thread_db_create_inferior (char *exec_file, char *allargs, char **env,
- int from_tty)
-{
- unpush_target (&thread_db_ops);
- using_thread_db = 0;
- target_beneath->to_create_inferior (exec_file, allargs, env, from_tty);
-}
-
-static void
-thread_db_post_startup_inferior (ptid_t ptid)
-{
- if (proc_handle.pid == 0)
- {
- /* The child process is now the actual multi-threaded
- program. Snatch its process ID... */
- proc_handle.pid = GET_PID (ptid);
-
- /* ...and perform the remaining initialization steps. */
- enable_thread_event_reporting ();
- thread_db_find_new_threads ();
- }
-}
-
-static void
-thread_db_mourn_inferior (void)
-{
- remove_thread_event_breakpoints ();
-
- /* Forget about the child's process ID. We shouldn't need it
- anymore. */
- proc_handle.pid = 0;
-
- target_beneath->to_mourn_inferior ();
-
- /* Detach thread_db target ops. */
- unpush_target (&thread_db_ops);
- using_thread_db = 0;
-}
-
-static int
-thread_db_thread_alive (ptid_t ptid)
-{
- td_thrhandle_t th;
- td_err_e err;
-
- if (is_thread (ptid))
- {
- struct thread_info *thread_info;
- thread_info = find_thread_pid (ptid);
-
- thread_db_map_id2thr (thread_info, 0);
- if (!thread_info->private->th_valid)
- return 0;
-
- err = td_thr_validate_p (&thread_info->private->th);
- if (err != TD_OK)
- return 0;
-
- if (!thread_info->private->ti_valid)
- {
- err =
- td_thr_get_info_p (&thread_info->private->th,
- &thread_info->private->ti);
- if (err != TD_OK)
- return 0;
- thread_info->private->ti_valid = 1;
- }
-
- if (thread_info->private->ti.ti_state == TD_THR_UNKNOWN
- || thread_info->private->ti.ti_state == TD_THR_ZOMBIE)
- return 0; /* A zombie thread. */
-
- return 1;
- }
-
- if (target_beneath->to_thread_alive)
- return target_beneath->to_thread_alive (ptid);
-
- return 0;
-}
-
-static int
-find_new_threads_callback (const td_thrhandle_t *th_p, void *data)
-{
- td_thrinfo_t ti;
- td_err_e err;
- ptid_t ptid;
-
- err = td_thr_get_info_p (th_p, &ti);
- if (err != TD_OK)
- error ("find_new_threads_callback: cannot get thread info: %s",
- thread_db_err_str (err));
-
- if (ti.ti_state == TD_THR_UNKNOWN || ti.ti_state == TD_THR_ZOMBIE)
- return 0; /* A zombie -- ignore. */
-
- ptid = BUILD_THREAD (ti.ti_tid, GET_PID (inferior_ptid));
-
- if (!in_thread_list (ptid))
- attach_thread (ptid, th_p, &ti, 1);
-
- return 0;
-}
-
-static void
-thread_db_find_new_threads (void)
-{
- td_err_e err;
-
- /* Iterate over all user-space threads to discover new threads. */
- err = td_ta_thr_iter_p (thread_agent, find_new_threads_callback, NULL,
- TD_THR_ANY_STATE, TD_THR_LOWEST_PRIORITY,
- TD_SIGNO_MASK, TD_THR_ANY_USER_FLAGS);
- if (err != TD_OK)
- error ("Cannot find new threads: %s", thread_db_err_str (err));
-}
-
-static char *
-thread_db_pid_to_str (ptid_t ptid)
-{
- if (is_thread (ptid))
- {
- static char buf[64];
- td_thrinfo_t *ti_p;
- td_err_e err;
- struct thread_info *thread_info;
-
- thread_info = find_thread_pid (ptid);
- thread_db_map_id2thr (thread_info, 0);
- if (!thread_info->private->th_valid)
- {
- snprintf (buf, sizeof (buf), "Thread %ld (Missing)",
- GET_THREAD (ptid));
- return buf;
- }
-
- ti_p = thread_db_get_info (thread_info);
-
- if (ti_p->ti_state == TD_THR_ACTIVE && ti_p->ti_lid != 0)
- {
- snprintf (buf, sizeof (buf), "Thread %ld (LWP %d)",
- (long) ti_p->ti_tid, ti_p->ti_lid);
- }
- else
- {
- snprintf (buf, sizeof (buf), "Thread %ld (%s)",
- (long) ti_p->ti_tid,
- thread_db_state_str (ti_p->ti_state));
- }
-
- return buf;
- }
-
- if (target_beneath->to_pid_to_str (ptid))
- return target_beneath->to_pid_to_str (ptid);
-
- return normal_pid_to_str (ptid);
-}
-
-/* Get the address of the thread local variable in OBJFILE which is
- stored at OFFSET within the thread local storage for thread PTID. */
-
-static CORE_ADDR
-thread_db_get_thread_local_address (ptid_t ptid, struct objfile *objfile,
- CORE_ADDR offset)
-{
- if (is_thread (ptid))
- {
- int objfile_is_library = (objfile->flags & OBJF_SHARED);
- td_err_e err;
- void *address;
- CORE_ADDR lm;
- struct thread_info *thread_info;
-
- /* glibc doesn't provide the needed interface. */
- if (!td_thr_tls_get_addr_p)
- error ("Cannot find thread-local variables in this thread library.");
-
- /* Get the address of the link map for this objfile. */
- lm = svr4_fetch_objfile_link_map (objfile);
-
- /* Whoops, we couldn't find one. Bail out. */
- if (!lm)
- {
- if (objfile_is_library)
- error ("Cannot find shared library `%s' link_map in dynamic"
- " linker's module list", objfile->name);
- else
- error ("Cannot find executable file `%s' link_map in dynamic"
- " linker's module list", objfile->name);
- }
-
- /* Get info about the thread. */
- thread_info = find_thread_pid (ptid);
- thread_db_map_id2thr (thread_info, 1);
-
- /* Finally, get the address of the variable. */
- err = td_thr_tls_get_addr_p (&thread_info->private->th, (void *) lm,
- offset, &address);
-
-#ifdef THREAD_DB_HAS_TD_NOTALLOC
- /* The memory hasn't been allocated, yet. */
- if (err == TD_NOTALLOC)
- {
- /* Now, if libthread_db provided the initialization image's
- address, we *could* try to build a non-lvalue value from
- the initialization image. */
- if (objfile_is_library)
- error ("The inferior has not yet allocated storage for"
- " thread-local variables in\n"
- "the shared library `%s'\n"
- "for the thread %ld",
- objfile->name, (long) GET_THREAD (ptid));
- else
- error ("The inferior has not yet allocated storage for"
- " thread-local variables in\n"
- "the executable `%s'\n"
- "for the thread %ld",
- objfile->name, (long) GET_THREAD (ptid));
- }
-#endif
-
- /* Something else went wrong. */
- if (err != TD_OK)
- {
- if (objfile_is_library)
- error ("Cannot find thread-local storage for thread %ld, "
- "shared library %s:\n%s",
- (long) GET_THREAD (ptid),
- objfile->name, thread_db_err_str (err));
- else
- error ("Cannot find thread-local storage for thread %ld, "
- "executable file %s:\n%s",
- (long) GET_THREAD (ptid),
- objfile->name, thread_db_err_str (err));
- }
-
- /* Cast assuming host == target. Joy. */
- return (CORE_ADDR) address;
- }
-
- if (target_beneath->to_get_thread_local_address)
- return target_beneath->to_get_thread_local_address (ptid, objfile,
- offset);
-
- error ("Cannot find thread-local values on this target.");
-}
-
-static void
-init_thread_db_ops (void)
-{
- thread_db_ops.to_shortname = "multi-thread";
- thread_db_ops.to_longname = "multi-threaded child process.";
- thread_db_ops.to_doc = "Threads and pthreads support.";
- thread_db_ops.to_attach = thread_db_attach;
- thread_db_ops.to_detach = thread_db_detach;
- thread_db_ops.to_resume = thread_db_resume;
- thread_db_ops.to_wait = thread_db_wait;
- thread_db_ops.to_fetch_registers = thread_db_fetch_registers;
- thread_db_ops.to_store_registers = thread_db_store_registers;
- thread_db_ops.deprecated_xfer_memory = thread_db_xfer_memory;
- thread_db_ops.to_kill = thread_db_kill;
- thread_db_ops.to_create_inferior = thread_db_create_inferior;
- thread_db_ops.to_post_startup_inferior = thread_db_post_startup_inferior;
- thread_db_ops.to_mourn_inferior = thread_db_mourn_inferior;
- thread_db_ops.to_thread_alive = thread_db_thread_alive;
- 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_stratum = thread_stratum;
- thread_db_ops.to_has_thread_control = tc_schedlock;
- thread_db_ops.to_get_thread_local_address
- = thread_db_get_thread_local_address;
- thread_db_ops.to_magic = OPS_MAGIC;
-}
-
-void
-_initialize_thread_db (void)
-{
- /* Only initialize the module if we can load libthread_db. */
- if (thread_db_load ())
- {
- init_thread_db_ops ();
- add_target (&thread_db_ops);
-
- /* Add ourselves to objfile event chain. */
- target_new_objfile_chain = deprecated_target_new_objfile_hook;
- deprecated_target_new_objfile_hook = thread_db_new_objfile;
- }
-}
projects / binutils-gdb.git / commitdiff