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Re: Why SIGABRT
- From: Siddhesh Poyarekar <siddhesh dot poyarekar at gmail dot com>
- To: JoÃl KrÃhemann <weedlight at gmail dot com>
- Cc: libc-help <libc-help at sourceware dot org>
- Date: Wed, 2 Jul 2014 16:44:45 +0530
- Subject: Re: Why SIGABRT
- Authentication-results: sourceware.org; auth=none
- References: <CANr2zYjVgOea-tShj_UTmpq=N_Avb2LdGUOdrgOHTymGJ=MzWw at mail dot gmail dot com>
On 2 July 2014 16:35, JoÃl KrÃhemann <weedlight@gmail.com> wrote:
> Hi, my name is JoÃl KrÃhemann and I'm developing Advanced Gtk+
> Sequencer. I get the following backtrace out of gdb. `ags` should be
> thread safe so perhaps it's more related to glib and the root cause
> may be line 4 and: have_lock=0
>
> I'll read the source code of glib for further investigation, assumed
> someone knows the problem it would be nice to know it.
The problem here is that there was a memory corruption which free
detected and hence aborted. The memory corruption could have happened
anywhere in the program; a tool like valgrind may help uncover the
root cause.
> What about ignoring SIGABRT?
You can ignore SIGABRT by exporting MALLOC_CHECK_ (the trailing
underscore is not a typo) to 0, but that is just papering over the
memory corruption.
Siddhesh
>
> 7fff937d0000-7fff93fd0000 rw-p 00000000 00:00 0
> 7fff93fd0000-7fff93fd1000 ---p 00000000 00:00 0
> 7fff93fd1000-7fff947d1000 rw-p 00000000 00:00 0
> 7fff947d1000-7fff947d2000 ---p 00000000 00:00 0
> 7fff947d2000-7fff94fd2000 rw-p 00000000 00:00 0
> 7fff94fd2000-7fff94fd3000 ---p 00000000 00:00 0
> 7fff94fd3000-7fff957d3000 rw-p 00000000 00:00 0
> 7fff957d3000-7fff957d4000 ---p 00000000 00:00 0
> 7fff957d4000-7fff95fd4000 rw-p 00000000 00:00 0
> 7fff95fd4000-7fff95fd5000 ---p 00000000 00:00 0
> 7fff95fd5000-7fff967d5000 rw-p 00000000 00:00 0
> Program received signal SIGABRT, Aborted.
> [Switching to Thread 0x7fffeec86700 (LWP 15013)]
> 0x00007ffff0303349 in __GI_raise (sig=sig@entry=6) at
> ../nptl/sysdeps/unix/sysv/linux/raise.c:56
> 56 return INLINE_SYSCALL (tgkill, 3, pid, selftid, sig);
> (gdb) make ags
> (gdb) bt
> #0 0x00007ffff0303349 in __GI_raise (sig=sig@entry=6) at
> ../nptl/sysdeps/unix/sysv/linux/raise.c:56
> #1 0x00007ffff0304748 in __GI_abort () at abort.c:89
> #2 0x00007ffff03411d4 in __libc_message
> (do_abort=do_abort@entry=2, fmt=fmt@entry=0x7ffff04334b8 "*** Error in
> `%s': %s: 0x%s ***\n") at ../sysdeps/posix/libc_fatal.c:175
> #3 0x00007ffff034695e in malloc_printerr (action=3,
> str=0x7ffff042f608 "free(): invalid size", ptr=<optimized out>) at
> malloc.c:4991
> #4 0x00007ffff0347666 in _int_free (av=<optimized out>,
> p=<optimized out>, have_lock=0) at malloc.c:3837
> #5 0x00007ffff290dec8 in g_free () from
> /usr/lib/../lib64/libglib-2.0.so.0
> #6 0x00007ffff2902518 in g_list_foreach () from
> /usr/lib/../lib64/libglib-2.0.so.0
> #7 0x00007ffff2901ac8 in g_list_free_full () from
> /usr/lib/../lib64/libglib-2.0.so.0
> #8 0x000000000046a74f in ags_audio_signal_finalize
> (gobject=0x7fffdc18adc0) at ./src/ags/audio/ags_audio_signal.c:329
> #9 0x00007ffff2df1282 in g_object_unref () from
> /usr/lib/../lib64/libgobject-2.0.so.0
> #10 0x000000000046c752 in
> ags_recall_recycling_set_property (gobject=0x7fffdc793cf0,
> prop_id=<optimized out>, value=0x7fffeec83d50,
> param_spec=0x7fffe17ed280) at
> ./src/ags/audio/ags_recall_recycling.c:367
--
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