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| author | Jan Kratochvil <jan.kratochvil@redhat.com> | 2014-08-21 20:36:20 +0200 |
|---|---|---|
| committer | Jan Kratochvil <jan.kratochvil@redhat.com> | 2014-08-21 20:36:20 +0200 |
| commit | 22fd09ae995556cc1b898afe3d5901eb161d1102 (patch) | |
| tree | 5ff6539a93ea414391cf51270809fc75ee807b04 /gdb/linux-tdep.c | |
| parent | 656e8868f333de49bf22e10112392ca404e5eb67 (diff) | |
| download | gdb-22fd09ae995556cc1b898afe3d5901eb161d1102.zip gdb-22fd09ae995556cc1b898afe3d5901eb161d1102.tar.gz gdb-22fd09ae995556cc1b898afe3d5901eb161d1102.tar.bz2 | |
Fix 'gcore' with exited threads
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.
Diffstat (limited to 'gdb/linux-tdep.c')
| -rw-r--r-- | gdb/linux-tdep.c | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/gdb/linux-tdep.c b/gdb/linux-tdep.c index d0f1106..dae59c5 100644 --- a/gdb/linux-tdep.c +++ b/gdb/linux-tdep.c @@ -1194,6 +1194,11 @@ linux_corefile_thread_callback (struct thread_info *info, void *data) { 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; @@ -1445,6 +1450,7 @@ linux_make_corefile_notes (struct gdbarch *gdbarch, bfd *obfd, int *note_size, char *note_data = NULL; gdb_byte *auxv; int auxv_len; + volatile struct gdb_exception e; if (linux_fill_prpsinfo (&prpsinfo)) { @@ -1468,6 +1474,12 @@ linux_make_corefile_notes (struct gdbarch *gdbarch, bfd *obfd, int *note_size, } /* 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; |