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[rfa:threads] Report when using libthread_db
- From: Andrew Cagney <ac131313 at redhat dot com>
- To: gdb-patches at sources dot redhat dot com
- Date: Tue, 05 Aug 2003 15:26:47 -0400
- Subject: [rfa:threads] Report when using libthread_db
Hello,
This modifies thread-db.c so that reports when libthread_db has been
loaded and when it is being used vis:
The load ...
Loading libthread_db library "libthread_db.so.1"
GNU gdb 2003-08-05-cvs
Copyright 2003 Free Software Foundation, Inc.
GDB is free software, covered by the GNU ....
(gdb)
The use ...
(gdb) run
Starting program:
/home/cagney/PENDING/2003-08-05-warn-thread-db/N-x86_64-unknow
n-linux-gnu/gdb/testsuite/gdb.threads/pthreads
Threaded debugging using libthread_db enabled.
[New Thread 182894192832 (LWP 23928)]
[Switching to Thread 182894192832 (LWP 23928)]
Thoughts?
Perhaphs the enabled message should be in []?
Should the "Loading" message come after the (C) notice, or the (C) put
before the modules are initialized?
Anyone know of a way of finding the exact actual libthread_db version so
that can be printed as well?
If that's resolved, ok for 6.0 or mainline?
Andrew
2003-08-05 Andrew Cagney <cagney@redhat.com>
* thread-db.c (verbose_dlsym): New function.
(thread_db_load): Use verbose_dlsym. Print that the libthread-db
is being loaded.
(thread_db_new_objfile): Print that thread debugging was enabled.
Index: thread-db.c
===================================================================
RCS file: /cvs/src/src/gdb/thread-db.c,v
retrieving revision 1.33
diff -u -r1.33 thread-db.c
--- thread-db.c 5 Jun 2003 18:22:02 -0000 1.33
+++ thread-db.c 5 Aug 2003 19:16:02 -0000
@@ -375,6 +375,15 @@
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)
{
@@ -390,51 +399,57 @@
"GDB will not be able to debug pthreads.\n\n");
return 0;
}
+ else
+ {
+ fprintf_unfiltered (gdb_stdlog, "Loading libthread_db library \"%s\"\n",
+ LIBTHREAD_DB_SO);
+
+ }
/* Initialize pointers to the dynamic library functions we will use.
Essential functions first. */
- td_init_p = dlsym (handle, "td_init");
+ td_init_p = verbose_dlsym (handle, "td_init");
if (td_init_p == NULL)
return 0;
- td_ta_new_p = dlsym (handle, "td_ta_new");
+ td_ta_new_p = verbose_dlsym (handle, "td_ta_new");
if (td_ta_new_p == NULL)
return 0;
- td_ta_map_id2thr_p = dlsym (handle, "td_ta_map_id2thr");
+ td_ta_map_id2thr_p = verbose_dlsym (handle, "td_ta_map_id2thr");
if (td_ta_map_id2thr_p == NULL)
return 0;
- td_ta_map_lwp2thr_p = dlsym (handle, "td_ta_map_lwp2thr");
+ td_ta_map_lwp2thr_p = verbose_dlsym (handle, "td_ta_map_lwp2thr");
if (td_ta_map_lwp2thr_p == NULL)
return 0;
- td_ta_thr_iter_p = dlsym (handle, "td_ta_thr_iter");
+ td_ta_thr_iter_p = verbose_dlsym (handle, "td_ta_thr_iter");
if (td_ta_thr_iter_p == NULL)
return 0;
- td_thr_validate_p = dlsym (handle, "td_thr_validate");
+ td_thr_validate_p = verbose_dlsym (handle, "td_thr_validate");
if (td_thr_validate_p == NULL)
return 0;
- td_thr_get_info_p = dlsym (handle, "td_thr_get_info");
+ td_thr_get_info_p = verbose_dlsym (handle, "td_thr_get_info");
if (td_thr_get_info_p == NULL)
return 0;
- td_thr_getfpregs_p = dlsym (handle, "td_thr_getfpregs");
+ td_thr_getfpregs_p = verbose_dlsym (handle, "td_thr_getfpregs");
if (td_thr_getfpregs_p == NULL)
return 0;
- td_thr_getgregs_p = dlsym (handle, "td_thr_getgregs");
+ td_thr_getgregs_p = verbose_dlsym (handle, "td_thr_getgregs");
if (td_thr_getgregs_p == NULL)
return 0;
- td_thr_setfpregs_p = dlsym (handle, "td_thr_setfpregs");
+ td_thr_setfpregs_p = verbose_dlsym (handle, "td_thr_setfpregs");
if (td_thr_setfpregs_p == NULL)
return 0;
- td_thr_setgregs_p = dlsym (handle, "td_thr_setgregs");
+ td_thr_setgregs_p = verbose_dlsym (handle, "td_thr_setgregs");
if (td_thr_setgregs_p == NULL)
return 0;
@@ -624,6 +639,8 @@
break;
case TD_OK:
+ fprintf_unfiltered (gdb_stdlog, "Threaded 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;