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2010-07-31 Paul Pluzhnikov <ppluzhnikov@google.com>

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* linux-thread-db.c (libthread_db_debug): New variable.
       (thread_db_find_new_threads_silently): Control verbosity with it.
       (try_thread_db_load_1, try_thread_db_load): Likewise.
       (find_new_threads_once): Likewise.
       (_initialize_thread_db): Set/show it.

doc/ChangeLog
2010-07-31  Paul Pluzhnikov  <ppluzhnikov@google.com>

       * gdb.texinfo (Threads): Document 'debug libthread-db'.
This commit is contained in:
Paul Pluzhnikov 2010-07-31 15:34:41 +00:00
parent 310444acc2
commit 02d868e86d
4 changed files with 49 additions and 7 deletions
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36
gdb/linux-thread-db.c
View file

@ -75,6 +75,18 @@
static char *libthread_db_search_path;
/* If non-zero, print details of libthread_db processing. */
static int libthread_db_debug;
static void
show_libthread_db_debug (struct ui_file *file, int from_tty,
struct cmd_list_element *c, const char *value)
{
fprintf_filtered (file, _("libthread-db debugging is %s.\n"), value);
}
/* If we're running on GNU/Linux, we must explicitly attach to any new
threads. */
@ -601,7 +613,7 @@ thread_db_find_new_threads_silently (ptid_t ptid)
thread_db_find_new_threads_2 (ptid, 1);
}
if (except.reason < 0 && info_verbose)
if (except.reason < 0 && libthread_db_debug)
{
exception_fprintf (gdb_stderr, except,
"Warning: thread_db_find_new_threads_silently: ");
@ -658,7 +670,7 @@ try_thread_db_load_1 (struct thread_db_info *info)
err = info->td_ta_new_p (&info->proc_handle, &info->thread_agent);
if (err != TD_OK)
{
if (info_verbose)
if (libthread_db_debug)
printf_unfiltered (_("td_ta_new failed: %s\n"),
thread_db_err_str (err));
else
@ -708,7 +720,7 @@ try_thread_db_load_1 (struct thread_db_info *info)
printf_unfiltered (_("[Thread debugging using libthread_db enabled]\n"));
if (info_verbose || *libthread_db_search_path)
if (libthread_db_debug || *libthread_db_search_path)
{
const char *library;
@ -745,18 +757,18 @@ try_thread_db_load (const char *library)
void *handle;
struct thread_db_info *info;
if (info_verbose)
if (libthread_db_debug)
printf_unfiltered (_("Trying host libthread_db library: %s.\n"),
library);
handle = dlopen (library, RTLD_NOW);
if (handle == NULL)
{
if (info_verbose)
if (libthread_db_debug)
printf_unfiltered (_("dlopen failed: %s.\n"), dlerror ());
return 0;
}
if (info_verbose && strchr (library, '/') == NULL)
if (libthread_db_debug && strchr (library, '/') == NULL)
{
void *td_init;
@ -1381,7 +1393,7 @@ find_new_threads_once (struct thread_db_info *info, int iteration,
TD_THR_ANY_USER_FLAGS);
}
if (info_verbose)
if (libthread_db_debug)
{
if (except.reason < 0)
exception_fprintf (gdb_stderr, except,
@ -1685,6 +1697,16 @@ gdb itself."),
NULL,
NULL,
&setlist, &showlist);
add_setshow_zinteger_cmd ("libthread-db", class_maintenance,
&libthread_db_debug, _("\
Set libthread-db debugging."), _("\
Show libthread-db debugging."), _("\
When non-zero, libthread-db debugging is enabled."),
NULL,
show_libthread_db_debug,
&setdebuglist, &showdebuglist);
/* Add ourselves to objfile event chain. */
observer_attach_new_objfile (thread_db_new_objfile);
}