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bug#21965: 24.5; Emacs freezes when canceling at open file
From: |
Maneesh Yadav |
Subject: |
bug#21965: 24.5; Emacs freezes when canceling at open file |
Date: |
Mon, 23 Nov 2015 13:29:24 -0800 |
Flog me if I am not doing this right. Seems that +debug on macports
is the easy to make debug compiles (an old thread seemed to suggest
that macports rejected this idea...but I guess it was eventually
accepted). So installed emacs +debug and reproduced the crash,
attached to emacs via lldb and got this backtrace (which looks a lot
like the previous, can I provide better info somehow?):
(lldb) process attach --name emacs
Process 23166 stopped
* thread #1: tid = 0x4d18b, 0x00007fff8a861166
libsystem_kernel.dylib`__psynch_mutexwait + 10, queue =
'com.apple.main-thread', stop reason = signal SIGSTOP
frame #0: 0x00007fff8a861166 libsystem_kernel.dylib`__psynch_mutexwait + 10
libsystem_kernel.dylib`__psynch_mutexwait:
-> 0x7fff8a861166 <+10>: jae 0x7fff8a861170 ; <+20>
0x7fff8a861168 <+12>: movq %rax, %rdi
0x7fff8a86116b <+15>: jmp 0x7fff8a85cc53 ; cerror_nocancel
0x7fff8a861170 <+20>: retq
Executable module set to "/opt/local/bin/emacs".
Architecture set to: x86_64h-apple-macosx.
(lldb) thread backtrace
* thread #1: tid = 0x4d18b, 0x00007fff8a861166
libsystem_kernel.dylib`__psynch_mutexwait + 10, queue =
'com.apple.main-thread', stop reason = signal SIGSTOP
* frame #0: 0x00007fff8a861166 libsystem_kernel.dylib`__psynch_mutexwait + 10
frame #1: 0x00007fff853b5696
libsystem_pthread.dylib`_pthread_mutex_lock + 480
frame #2: 0x0000000100a17ba1 libglib-2.0.0.dylib`g_mutex_lock + 26
frame #3: 0x00000001009db284 libglib-2.0.0.dylib`g_main_context_acquire + 42
frame #4: 0x000000010024fc47 emacs`xg_select + 231
frame #5: 0x0000000100225c3d emacs`wait_reading_process_output + 3757
frame #6: 0x0000000100008cb6 emacs`sit_for + 582
frame #7: 0x0000000100108f00 emacs`read_char + 4496
frame #8: 0x0000000100104edd emacs`read_key_sequence + 1757
frame #9: 0x0000000100103cec emacs`command_loop_1 + 1212
frame #10: 0x00000001001bf04e emacs`internal_condition_case + 382
frame #11: 0x000000010011ce09 emacs`command_loop_2 + 41
frame #12: 0x00000001001be696 emacs`internal_catch + 342
frame #13: 0x0000000100102ddb emacs`command_loop + 187
frame #14: 0x0000000100102c9f emacs`recursive_edit_1 + 127
frame #15: 0x0000000100102f87 emacs`Frecursive_edit + 327
frame #16: 0x0000000100100fd3 emacs`main + 4387
frame #17: 0x00007fff8707a5c9 libdyld.dylib`start + 1
frame #18: 0x00007fff8707a5c9 libdyld.dylib`start + 1
On Sat, Nov 21, 2015 at 9:15 PM, Maneesh Yadav <maneeshkyadav@gmail.com> wrote:
> The trace is what what I saw after I sent pkill -USR2 emacs, I don't
> know quite know how to read it (other than the vague references to
> mutexs...no idea if that is actually relevant). Still trying to
> figure out how to get macports to compile debug emacs...hopefully will
> figure it out this w/e.
>
> On Sat, Nov 21, 2015 at 9:11 PM, John Wiegley <jwiegley@gmail.com> wrote:
>>>>>>> Eli Zaretskii <eliz@gnu.org> writes:
>>
>>>> 7 libglib-2.0.0.dylib 0x0000000100888ba1 g_mutex_lock +
>>>> 26
>>>> 8 libglib-2.0.0.dylib 0x000000010084c284
>>>> g_main_context_acquire + 42
>>>> 9 emacs 0x00000001001447cc xg_select + 135
>>>> 10 emacs 0x000000010012dbe2
>>>> wait_reading_process_output + 2074
>>>> 11 emacs 0x00000001000075b5 sit_for + 260
>>>> 12 emacs 0x000000010008be56 read_char + 5024
>>>> 13 emacs 0x000000010008918c
>>>> read_key_sequence + 1526
>>
>>> This backtrace simply says that Emacs called 'abort'. And it did so
>>> because the user told it so.
>>
>> It might also be saying that Emacs deadlocked trying to obtain a mutex.
>>
>> John
- bug#21965: 24.5; Emacs freezes when canceling at open file, (continued)
- bug#21965: 24.5; Emacs freezes when canceling at open file, John Wiegley, 2015/11/20
- bug#21965: 24.5; Emacs freezes when canceling at open file, Maneesh Yadav, 2015/11/20
- bug#21965: 24.5; Emacs freezes when canceling at open file, Maneesh Yadav, 2015/11/20
- bug#21965: 24.5; Emacs freezes when canceling at open file, John Wiegley, 2015/11/20
- bug#21965: 24.5; Emacs freezes when canceling at open file, Maneesh Yadav, 2015/11/20
- bug#21965: 24.5; Emacs freezes when canceling at open file, John Wiegley, 2015/11/20
- bug#21965: 24.5; Emacs freezes when canceling at open file, Maneesh Yadav, 2015/11/20
- bug#21965: 24.5; Emacs freezes when canceling at open file, Eli Zaretskii, 2015/11/21
- bug#21965: 24.5; Emacs freezes when canceling at open file, John Wiegley, 2015/11/22
- bug#21965: 24.5; Emacs freezes when canceling at open file, Maneesh Yadav, 2015/11/22
- bug#21965: 24.5; Emacs freezes when canceling at open file,
Maneesh Yadav <=
- bug#21965: 24.5; Emacs freezes when canceling at open file, John Wiegley, 2015/11/23
- bug#21965: 24.5; Emacs freezes when canceling at open file, Maneesh Yadav, 2015/11/23
- bug#21965: 24.5; Emacs freezes when canceling at open file, Eli Zaretskii, 2015/11/23
- bug#21965: 24.5; Emacs freezes when canceling at open file, Eli Zaretskii, 2015/11/23
- bug#21965: 24.5; Emacs freezes when canceling at open file, John Wiegley, 2015/11/23
- bug#21965: 24.5; Emacs freezes when canceling at open file, Maneesh Yadav, 2015/11/24
- bug#21965: 24.5; Emacs freezes when canceling at open file, Maneesh Yadav, 2015/11/24
- bug#21965: 24.5; Emacs freezes when canceling at open file, John Wiegley, 2015/11/24
- bug#21965: 24.5; Emacs freezes when canceling at open file, Maneesh Yadav, 2015/11/24
- bug#21965: 24.5; Emacs freezes when canceling at open file, John Wiegley, 2015/11/24