diff options
Diffstat (limited to 'toolchain/gdb/patches/710-debian_thread-db-multiple-libraries.patch')
| -rw-r--r-- | toolchain/gdb/patches/710-debian_thread-db-multiple-libraries.patch | 593 |
1 files changed, 593 insertions, 0 deletions
diff --git a/toolchain/gdb/patches/710-debian_thread-db-multiple-libraries.patch b/toolchain/gdb/patches/710-debian_thread-db-multiple-libraries.patch new file mode 100644 index 0000000000..c164bd11a2 --- /dev/null +++ b/toolchain/gdb/patches/710-debian_thread-db-multiple-libraries.patch @@ -0,0 +1,593 @@ +Support loading two libthread_db DSOs. In this case, the LinuxThreads +and NPTL ones. + +Index: gdb-6.3/gdb/thread-db.c +=================================================================== +--- gdb-6.3.orig/gdb/thread-db.c 2004-11-10 10:46:24.000000000 -0500 ++++ gdb-6.3/gdb/thread-db.c 2004-11-10 11:22:34.858812426 -0500 +@@ -79,53 +79,63 @@ static td_thragent_t *thread_agent; + + /* Pointers to the libthread_db functions. */ + +-static td_err_e (*td_init_p) (void); ++struct thread_db_pointers ++{ ++ const char *filename; ++ ++ 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); ++ td_err_e (*td_ta_new_p) (struct ps_prochandle * ps, ++ td_thragent_t **ta); ++ td_err_e (*td_ta_map_id2thr_p) (const td_thragent_t *ta, thread_t pt, ++ td_thrhandle_t *__th); ++ td_err_e (*td_ta_map_lwp2thr_p) (const td_thragent_t *ta, ++ lwpid_t lwpid, td_thrhandle_t *th); ++ ++ 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); ++ td_err_e (*td_ta_event_addr_p) (const td_thragent_t *ta, ++ td_event_e event, td_notify_t *ptr); ++ td_err_e (*td_ta_set_event_p) (const td_thragent_t *ta, ++ td_thr_events_t *event); ++ td_err_e (*td_ta_event_getmsg_p) (const td_thragent_t *ta, ++ td_event_msg_t *msg); ++ ++ td_err_e (*td_thr_validate_p) (const td_thrhandle_t *th); ++ td_err_e (*td_thr_get_info_p) (const td_thrhandle_t *th, ++ td_thrinfo_t *infop); ++ td_err_e (*td_thr_getfpregs_p) (const td_thrhandle_t *th, ++ gdb_prfpregset_t *regset); ++ td_err_e (*td_thr_getgregs_p) (const td_thrhandle_t *th, ++ prgregset_t gregs); ++ td_err_e (*td_thr_setfpregs_p) (const td_thrhandle_t *th, ++ const gdb_prfpregset_t *fpregs); ++ td_err_e (*td_thr_setgregs_p) (const td_thrhandle_t *th, ++ prgregset_t gregs); ++ td_err_e (*td_thr_event_enable_p) (const td_thrhandle_t *th, ++ int event); ++ ++ td_err_e (*td_thr_tls_get_addr_p) (const td_thrhandle_t *th, ++ void *map_address, ++ size_t offset, void **address); ++ ++ struct thread_db_pointers *next; ++}; + + /* 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; ++CORE_ADDR td_create_bp_addr; + + /* Location of the thread death event breakpoint. */ +-static CORE_ADDR td_death_bp_addr; ++CORE_ADDR td_death_bp_addr; ++ ++static struct thread_db_pointers *current_pointers, *all_pointers; + + /* Prototypes for local functions. */ + static void thread_db_find_new_threads (void); +@@ -262,7 +272,7 @@ thread_get_info_callback (const td_thrha + struct thread_info *thread_info; + ptid_t thread_ptid; + +- err = td_thr_get_info_p (thp, &ti); ++ err = current_pointers->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)); +@@ -316,8 +326,9 @@ thread_db_map_id2thr (struct thread_info + if (thread_info->private->th_valid) + return; + +- err = td_ta_map_id2thr_p (thread_agent, GET_THREAD (thread_info->ptid), +- &thread_info->private->th); ++ err = current_pointers->td_ta_map_id2thr_p (thread_agent, ++ GET_THREAD (thread_info->ptid), ++ &thread_info->private->th); + if (err != TD_OK) + { + if (fatal) +@@ -340,8 +351,8 @@ thread_db_get_info (struct thread_info * + 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); ++ err = current_pointers->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)); +@@ -365,7 +376,8 @@ thread_from_lwp (ptid_t ptid) + + gdb_assert (is_lwp (ptid)); + +- err = td_ta_map_lwp2thr_p (thread_agent, GET_LWP (ptid), &th); ++ err = current_pointers->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)); +@@ -420,85 +432,102 @@ verbose_dlsym (void *handle, const char + return sym; + } + +-static int +-thread_db_load (void) ++static struct thread_db_pointers * ++thread_db_load (const char *name) + { ++ struct thread_db_pointers *ptrs; ++ Dl_info info; + void *handle; + td_err_e err; + +- handle = dlopen (LIBTHREAD_DB_SO, RTLD_NOW); ++ ptrs = xcalloc (1, sizeof (struct thread_db_pointers)); ++ ++ handle = dlopen (name, 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"); ++ if (all_pointers == NULL) ++ { ++ fprintf_filtered (gdb_stderr, "\n\ndlopen failed on '%s' - %s\n", ++ name, 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) ++ ptrs->td_init_p = verbose_dlsym (handle, "td_init"); ++ if (ptrs->td_init_p == NULL) + return 0; + +- td_ta_new_p = verbose_dlsym (handle, "td_ta_new"); +- if (td_ta_new_p == NULL) ++ ptrs->td_ta_new_p = verbose_dlsym (handle, "td_ta_new"); ++ if (ptrs->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) ++ ptrs->td_ta_map_id2thr_p = verbose_dlsym (handle, "td_ta_map_id2thr"); ++ if (ptrs->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) ++ ptrs->td_ta_map_lwp2thr_p = verbose_dlsym (handle, "td_ta_map_lwp2thr"); ++ if (ptrs->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) ++ ptrs->td_ta_thr_iter_p = verbose_dlsym (handle, "td_ta_thr_iter"); ++ if (ptrs->td_ta_thr_iter_p == NULL) + return 0; + +- td_thr_validate_p = verbose_dlsym (handle, "td_thr_validate"); +- if (td_thr_validate_p == NULL) ++ ptrs->td_thr_validate_p = verbose_dlsym (handle, "td_thr_validate"); ++ if (ptrs->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) ++ ptrs->td_thr_get_info_p = verbose_dlsym (handle, "td_thr_get_info"); ++ if (ptrs->td_thr_get_info_p == NULL) + return 0; + +- td_thr_getfpregs_p = verbose_dlsym (handle, "td_thr_getfpregs"); +- if (td_thr_getfpregs_p == NULL) ++ ptrs->td_thr_getfpregs_p = verbose_dlsym (handle, "td_thr_getfpregs"); ++ if (ptrs->td_thr_getfpregs_p == NULL) + return 0; + +- td_thr_getgregs_p = verbose_dlsym (handle, "td_thr_getgregs"); +- if (td_thr_getgregs_p == NULL) ++ ptrs->td_thr_getgregs_p = verbose_dlsym (handle, "td_thr_getgregs"); ++ if (ptrs->td_thr_getgregs_p == NULL) + return 0; + +- td_thr_setfpregs_p = verbose_dlsym (handle, "td_thr_setfpregs"); +- if (td_thr_setfpregs_p == NULL) ++ ptrs->td_thr_setfpregs_p = verbose_dlsym (handle, "td_thr_setfpregs"); ++ if (ptrs->td_thr_setfpregs_p == NULL) + return 0; + +- td_thr_setgregs_p = verbose_dlsym (handle, "td_thr_setgregs"); +- if (td_thr_setgregs_p == NULL) ++ ptrs->td_thr_setgregs_p = verbose_dlsym (handle, "td_thr_setgregs"); ++ if (ptrs->td_thr_setgregs_p == NULL) + return 0; + + /* Initialize the library. */ +- err = td_init_p (); ++ err = ptrs->td_init_p (); + if (err != TD_OK) + { + warning ("Cannot initialize libthread_db: %s", thread_db_err_str (err)); ++ xfree (ptrs); + 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"); ++ ptrs->td_ta_event_addr_p = dlsym (handle, "td_ta_event_addr"); ++ ptrs->td_ta_set_event_p = dlsym (handle, "td_ta_set_event"); ++ ptrs->td_ta_event_getmsg_p = dlsym (handle, "td_ta_event_getmsg"); ++ ptrs->td_thr_event_enable_p = dlsym (handle, "td_thr_event_enable"); ++ ptrs->td_thr_tls_get_addr_p = dlsym (handle, "td_thr_tls_get_addr"); ++ ++ if (dladdr (ptrs->td_ta_new_p, &info) != 0) ++ ptrs->filename = info.dli_fname; ++ ++ /* Try dlinfo? */ ++ ++ if (ptrs->filename == NULL) ++ /* Paranoid - don't let a NULL path slip through. */ ++ ptrs->filename = name; + +- return 1; ++ return ptrs; + } + + static td_err_e +@@ -508,7 +537,7 @@ enable_thread_event (td_thragent_t *thre + td_err_e err; + + /* Get the breakpoint address for thread EVENT. */ +- err = td_ta_event_addr_p (thread_agent, event, ¬ify); ++ err = current_pointers->td_ta_event_addr_p (thread_agent, event, ¬ify); + if (err != TD_OK) + return err; + +@@ -534,8 +563,10 @@ enable_thread_event_reporting (void) + + /* 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) ++ if (current_pointers->td_ta_event_addr_p == NULL ++ || current_pointers->td_ta_set_event_p == NULL ++ || current_pointers->td_ta_event_getmsg_p == NULL ++ || current_pointers->td_thr_event_enable_p == NULL) + return; + + /* Set the process wide mask saying which events we're interested in. */ +@@ -552,7 +583,7 @@ enable_thread_event_reporting (void) + #endif + td_event_addset (&events, TD_DEATH); + +- err = td_ta_set_event_p (thread_agent, &events); ++ err = current_pointers->td_ta_set_event_p (thread_agent, &events); + if (err != TD_OK) + { + warning ("Unable to set global thread event mask: %s", +@@ -592,7 +623,7 @@ disable_thread_event_reporting (void) + /* 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); ++ current_pointers->td_ta_set_event_p (thread_agent, &events); + + /* Delete thread event breakpoints, if any. */ + remove_thread_event_breakpoints (); +@@ -635,7 +666,6 @@ check_thread_signals (void) + static void + check_for_thread_db (void) + { +- td_err_e err; + static int already_loaded; + + /* First time through, report that libthread_db was successfuly +@@ -644,19 +674,8 @@ check_for_thread_db (void) + + if (!already_loaded) + { +- Dl_info info; +- const char *library = NULL; +- 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); ++ all_pointers->filename); + already_loaded = 1; + } + +@@ -674,28 +693,34 @@ check_for_thread_db (void) + 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) ++ for (current_pointers = all_pointers; ++ current_pointers != NULL; ++ current_pointers = current_pointers->next) + { +- case TD_NOLIBTHREAD: +- /* No thread library was detected. */ +- break; +- +- case TD_OK: +- printf_unfiltered ("[Thread debugging using libthread_db enabled]\n"); ++ td_err_e err; ++ err = current_pointers->td_ta_new_p (&proc_handle, &thread_agent); ++ switch (err) ++ { ++ case TD_NOLIBTHREAD: ++ /* No thread library was detected. */ ++ break; + +- /* The thread library was detected. Activate the thread_db target. */ +- push_target (&thread_db_ops); +- using_thread_db = 1; ++ case TD_OK: ++ printf_unfiltered ("[Thread debugging using libthread_db enabled]\n"); + +- enable_thread_event_reporting (); +- thread_db_find_new_threads (); +- break; ++ /* 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 (); ++ return; + +- default: +- warning ("Cannot initialize thread debugging library: %s", +- thread_db_err_str (err)); +- break; ++ default: ++ warning ("Cannot initialize thread debugging library: %s", ++ thread_db_err_str (err)); ++ break; ++ } + } + } + +@@ -766,7 +791,7 @@ attach_thread (ptid_t ptid, const td_thr + #endif + + /* Enable thread event reporting for this thread. */ +- err = td_thr_event_enable_p (th_p, 1); ++ err = current_pointers->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)); +@@ -892,7 +917,7 @@ check_event (ptid_t ptid) + + do + { +- err = td_ta_event_getmsg_p (thread_agent, &msg); ++ err = current_pointers->td_ta_event_getmsg_p (thread_agent, &msg); + if (err != TD_OK) + { + if (err == TD_NOMSG) +@@ -902,7 +927,7 @@ check_event (ptid_t ptid) + thread_db_err_str (err)); + } + +- err = td_thr_get_info_p (msg.th_p, &ti); ++ err = current_pointers->td_thr_get_info_p (msg.th_p, &ti); + if (err != TD_OK) + error ("Cannot get thread info: %s", thread_db_err_str (err)); + +@@ -1015,12 +1040,14 @@ thread_db_fetch_registers (int regno) + thread_info = find_thread_pid (inferior_ptid); + thread_db_map_id2thr (thread_info, 1); + +- err = td_thr_getgregs_p (&thread_info->private->th, gregset); ++ err = current_pointers->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); ++ err = current_pointers->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)); +@@ -1062,11 +1089,13 @@ thread_db_store_registers (int regno) + fill_gregset ((gdb_gregset_t *) gregset, -1); + fill_fpregset (&fpregset, -1); + +- err = td_thr_setgregs_p (&thread_info->private->th, gregset); ++ err = current_pointers->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); ++ err = current_pointers->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)); +@@ -1136,15 +1165,14 @@ thread_db_thread_alive (ptid_t ptid) + if (!thread_info->private->th_valid) + return 0; + +- err = td_thr_validate_p (&thread_info->private->th); ++ err = current_pointers->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); ++ err = current_pointers->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; +@@ -1170,7 +1198,7 @@ find_new_threads_callback (const td_thrh + td_err_e err; + ptid_t ptid; + +- err = td_thr_get_info_p (th_p, &ti); ++ err = current_pointers->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)); +@@ -1192,9 +1220,10 @@ 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); ++ err = current_pointers->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)); + } +@@ -1257,7 +1286,7 @@ thread_db_get_thread_local_address (ptid + struct thread_info *thread_info; + + /* glibc doesn't provide the needed interface. */ +- if (!td_thr_tls_get_addr_p) ++ if (!current_pointers->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. */ +@@ -1279,8 +1308,8 @@ thread_db_get_thread_local_address (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); ++ err = current_pointers->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. */ +@@ -1360,17 +1389,49 @@ init_thread_db_ops (void) + void + _initialize_thread_db (void) + { ++ struct thread_db_pointers *ptrs; ++ const char *p; ++ + /* Only initialize the module if we can load libthread_db. */ +- if (thread_db_load ()) +- { +- init_thread_db_ops (); +- add_target (&thread_db_ops); ++ ptrs = thread_db_load (LIBTHREAD_DB_SO); ++ if (ptrs == NULL) ++ return; ++ ++ all_pointers = ptrs; + +- /* Add ourselves to objfile event chain. */ +- target_new_objfile_chain = deprecated_target_new_objfile_hook; +- deprecated_target_new_objfile_hook = thread_db_new_objfile; ++ /* Some GNU/Linux systems have more than one binary-compatible copy ++ of libthread_db. If we can find a second one, load that too. ++ The inferior may force the use of a different threading package ++ than we expect. Our guess for the location is somewhat hokey: ++ strip out anything between /lib (or /lib64) and LIBTHREAD_DB_SO. ++ If we loaded the NPTL libthread_db by default, this may find us ++ the LinuxThreads copy. */ ++ p = strrchr (ptrs->filename, '/'); ++ while (p != NULL && p > ptrs->filename) ++ { ++ const char *component; + +- /* Register ourselves for the new inferior observer. */ +- observer_attach_inferior_created (check_for_thread_db_observer); ++ component = memrchr (ptrs->filename, '/', p - ptrs->filename); ++ if (component != NULL && strncmp (component, "/lib", 4) == 0) ++ { ++ char *new_name = xmalloc (p - ptrs->filename + 2 ++ + strlen (LIBTHREAD_DB_SO)); ++ memcpy (new_name, ptrs->filename, p - ptrs->filename + 1); ++ strcpy (new_name + (p - ptrs->filename) + 1, LIBTHREAD_DB_SO); ++ ptrs->next = thread_db_load (new_name); ++ xfree (new_name); ++ break; ++ } ++ p = component; + } ++ ++ 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; ++ ++ /* Register ourselves for the new inferior observer. */ ++ observer_attach_inferior_created (check_for_thread_db_observer); + } |