mirror of
git://projects.qi-hardware.com/openwrt-xburst.git
synced 2024-11-05 13:30:38 +02:00
e772a8b1a3
git-svn-id: svn://svn.openwrt.org/openwrt/trunk/openwrt@1166 3c298f89-4303-0410-b956-a3cf2f4a3e73
157 lines
5.2 KiB
Diff
157 lines
5.2 KiB
Diff
Status: submitted similar patch 2004-12-08
|
|
|
|
This patch cleans up the initialization of thread_db. It works for static
|
|
binaries now. The vsyscall patches hide this problem, since new static
|
|
binaries will load the vsyscall DSO and then trigger thread_db; but
|
|
this is still a good cleanup.
|
|
|
|
Index: gdb-6.3/gdb/thread-db.c
|
|
===================================================================
|
|
--- gdb-6.3.orig/gdb/thread-db.c 2004-10-08 16:29:56.000000000 -0400
|
|
+++ gdb-6.3/gdb/thread-db.c 2004-11-10 00:19:30.626530413 -0500
|
|
@@ -34,6 +34,7 @@
|
|
#include "target.h"
|
|
#include "regcache.h"
|
|
#include "solib-svr4.h"
|
|
+#include "observer.h"
|
|
|
|
#ifdef HAVE_GNU_LIBC_VERSION_H
|
|
#include <gnu/libc-version.h>
|
|
@@ -627,59 +628,49 @@ check_thread_signals (void)
|
|
#endif
|
|
}
|
|
|
|
+/* Check whether thread_db is usable. This function is called when
|
|
+ an inferior is created (or otherwise acquired, e.g. attached to)
|
|
+ and when new shared libraries are loaded into a running process. */
|
|
+
|
|
static void
|
|
-thread_db_new_objfile (struct objfile *objfile)
|
|
+check_for_thread_db (void)
|
|
{
|
|
td_err_e err;
|
|
+ static int already_loaded;
|
|
|
|
/* 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;
|
|
- }
|
|
- }
|
|
+ the interpreter and it's console haven't started. */
|
|
|
|
- /* Don't attempt to use thread_db on targets which can not run
|
|
- (core files). */
|
|
- if (objfile == NULL || !target_has_execution)
|
|
+ if (!already_loaded)
|
|
{
|
|
- /* 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;
|
|
- }
|
|
+ Dl_info info;
|
|
+ const char *library = NULL;
|
|
+ if (dladdr ((*td_ta_new_p), &info) != 0)
|
|
+ library = info.dli_fname;
|
|
+
|
|
+ /* Try dlinfo? */
|
|
|
|
- goto quit;
|
|
+ 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);
|
|
+ already_loaded = 1;
|
|
}
|
|
|
|
if (using_thread_db)
|
|
/* Nothing to do. The thread library was already detected and the
|
|
target vector was already activated. */
|
|
- goto quit;
|
|
+ return;
|
|
+
|
|
+ /* Don't attempt to use thread_db on targets which can not run
|
|
+ (executables not running yet, core files) for now. */
|
|
+ if (!target_has_execution)
|
|
+ return;
|
|
|
|
- /* Initialize the structure that identifies the child process. Note
|
|
- that at this point there is no guarantee that we actually have a
|
|
- child process. */
|
|
+ /* Initialize the structure that identifies the child process. */
|
|
proc_handle.pid = GET_PID (inferior_ptid);
|
|
|
|
/* Now attempt to open a connection to the thread library. */
|
|
@@ -706,12 +697,24 @@ thread_db_new_objfile (struct objfile *o
|
|
thread_db_err_str (err));
|
|
break;
|
|
}
|
|
+}
|
|
+
|
|
+static void
|
|
+thread_db_new_objfile (struct objfile *objfile)
|
|
+{
|
|
+ if (objfile != NULL)
|
|
+ check_for_thread_db ();
|
|
|
|
-quit:
|
|
if (target_new_objfile_chain)
|
|
target_new_objfile_chain (objfile);
|
|
}
|
|
|
|
+static void
|
|
+check_for_thread_db_observer (struct target_ops *target, int from_tty)
|
|
+{
|
|
+ check_for_thread_db ();
|
|
+}
|
|
+
|
|
/* 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. */
|
|
@@ -1366,5 +1369,8 @@ _initialize_thread_db (void)
|
|
/* 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);
|
|
}
|
|
}
|
|
Index: gdb-6.3/gdb/Makefile.in
|
|
===================================================================
|
|
--- gdb-6.3.orig/gdb/Makefile.in 2004-11-09 23:04:57.000000000 -0500
|
|
+++ gdb-6.3/gdb/Makefile.in 2004-11-10 00:19:26.440347022 -0500
|
|
@@ -2626,7 +2626,8 @@ thread.o: thread.c $(defs_h) $(symtab_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)
|
|
+ $(symfile_h) $(objfiles_h) $(target_h) $(regcache_h) $(solib_svr4_h) \
|
|
+ $(observer_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) \
|