Program received signal SIGABRT, Aborted.
[...]
(gdb) gcore foobar
Couldn't get registers: No such process.
(gdb) info threads
[...]
(gdb) gcore foobar
Saved corefile foobar
(gdb)
gcore tries to access the exited thread:
[Thread 0x7ffff7fce700 (LWP 6895) exited]
ptrace(PTRACE_GETREGS, 6895, 0, 0x7fff18167dd0) = -1 ESRCH (No such process)
Without the TRY_CATCH protection testsuite FAILs for:
gcore .../gdb/testsuite/gdb.threads/gcore-thread0.test
Cannot find new threads: debugger service failed
(gdb) FAIL: gdb.threads/gcore-thread.exp: save a zeroed-threads corefile
+
core .../gdb/testsuite/gdb.threads/gcore-thread0.test
".../gdb/testsuite/gdb.threads/gcore-thread0.test" is not a core dump: File format not recognized
(gdb) FAIL: gdb.threads/gcore-thread.exp: core0file: re-load generated corefile (bad file format)
Maybe the TRY_CATCH could be more inside update_thread_list().
Similar update_thread_list() call is IMO missing in procfs_make_note_section()
but I do not have where to verify that change.
gdb/ChangeLog
2014-08-21 Jan Kratochvil <jan.kratochvil@redhat.com>
* linux-tdep.c (linux_corefile_thread_callback): Ignore THREAD_EXITED.
(linux_make_corefile_notes): call update_thread_list, protected against
exceptions.
gdb/testsuite/ChangeLog
2014-08-21 Jan Kratochvil <jan.kratochvil@redhat.com>
* gdb.threads/gcore-stale-thread.c: New file.
* gdb.threads/gcore-stale-thread.exp: New file.
+2014-08-21 Jan Kratochvil <jan.kratochvil@redhat.com>
+
+ * linux-tdep.c (linux_corefile_thread_callback): Ignore THREAD_EXITED.
+ (linux_make_corefile_notes): call update_thread_list, protected against
+ exceptions.
+
2014-08-21 Pedro Alves <palves@redhat.com>
* infcmd.c (attach_command): Remove comment.
{
struct linux_corefile_thread_data *args = data;
+ /* It can be current thread
+ which cannot be removed by update_thread_list. */
+ if (info->state == THREAD_EXITED)
+ return 0;
+
if (ptid_get_pid (info->ptid) == args->pid)
{
struct cleanup *old_chain;
char *note_data = NULL;
gdb_byte *auxv;
int auxv_len;
+ volatile struct gdb_exception e;
if (linux_fill_prpsinfo (&prpsinfo))
{
}
/* Thread register information. */
+ TRY_CATCH (e, RETURN_MASK_ERROR)
+ {
+ update_thread_list ();
+ }
+ if (e.reason < 0)
+ exception_print (gdb_stderr, e);
thread_args.gdbarch = gdbarch;
thread_args.pid = ptid_get_pid (inferior_ptid);
thread_args.obfd = obfd;
+2014-08-21 Jan Kratochvil <jan.kratochvil@redhat.com>
+
+ * gdb.threads/gcore-stale-thread.c: New file.
+ * gdb.threads/gcore-stale-thread.exp: New file.
+
2014-08-21 Pedro Alves <palves@redhat.com>
* gdb.base/gcore-buffer-overflow.exp: Remove "help gcore" test.
--- /dev/null
+/* This testcase is part of GDB, the GNU debugger.
+
+ Copyright 2014 Free Software Foundation, Inc.
+
+ 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 3 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, see <http://www.gnu.org/licenses/>. */
+
+#include <pthread.h>
+#include <assert.h>
+
+static pthread_t main_thread;
+
+static void *
+start (void *arg)
+{
+ int i;
+
+ i = pthread_join (main_thread, NULL);
+ assert (i == 0);
+
+ return arg; /* break-here */
+}
+
+int
+main (void)
+{
+ pthread_t thread;
+ int i;
+
+ main_thread = pthread_self ();
+
+ i = pthread_create (&thread, NULL, start, NULL);
+ assert (i == 0);
+
+ pthread_exit (NULL);
+ assert (0);
+ return 0;
+}
--- /dev/null
+# Copyright 2014 Free Software Foundation, Inc.
+
+# 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 3 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, see <http://www.gnu.org/licenses/>.
+
+standard_testfile
+set corefile [standard_output_file ${testfile}.core]
+
+if {[gdb_compile_pthreads "${srcdir}/${subdir}/${srcfile}" "${binfile}" executable debug] != ""} {
+ return -1
+}
+
+clean_restart ${testfile}
+
+gdb_test_no_output "set non-stop on"
+
+if { ! [ runto_main ] } then {
+ return -1
+}
+
+gdb_test_multiple "info threads" "threads are supported" {
+ -re ".* main .*\r\n$gdb_prompt $" {
+ # OK, threads are supported.
+ }
+ -re "\r\n$gdb_prompt $" {
+ unsupported "gdb does not support threads on this target"
+ return -1
+ }
+}
+
+gdb_breakpoint ${srcfile}:[gdb_get_line_number "break-here"]
+# gdb_continue_to_breakpoint does not work as it uses "$gdb_prompt $" regex
+# which does not work due to the output: (gdb) [Thread ... exited]
+set name "continue to breakpoint: break-here"
+gdb_test_multiple "continue" $name {
+ -re "Breakpoint .* (at|in) .* break-here .*\r\n$gdb_prompt " {
+ pass $name
+ }
+}
+
+gdb_gcore_cmd "$corefile" "save a corefile"
+
+# Do not run "info threads" before "gcore" as it could workaround the bug
+# by discarding non-current exited threads.
+gdb_test "info threads" \
+ {The current thread <Thread ID 1> has terminated\. See `help thread'\.} \
+ "exited thread is current due to non-stop"
projects / binutils-gdb.git / commitdiff