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bug#29183: 27.0.50; SIGSEGV on C-g on Windows
From: |
Eli Zaretskii |
Subject: |
bug#29183: 27.0.50; SIGSEGV on C-g on Windows |
Date: |
Tue, 07 Nov 2017 21:41:05 +0200 |
> From: John Mastro <john.b.mastro@gmail.com>
> Date: Tue, 7 Nov 2017 10:14:09 -0800
> Cc: Eli Zaretskii <eliz@gnu.org>
>
> Eli Zaretskii <eliz@gnu.org> wrote:
> > Is this again bug#29040? Did main_thread become mis-aligned again?
>
> I repeated the commands Richard used in that bug report, and I believe
> you're right: it's 8-byte aligned rather than 16-byte aligned.
> Transcript below.
>
> Thread 1 received signal SIGSEGV, Segmentation fault.
> 0x00007ff8cb7893a0 in ntdll!RtlCaptureContext ()
> from C:\Windows\SYSTEM32\ntdll.dll
> (gdb) frame 0
> #0 0x00007ff8cb7893a0 in ntdll!RtlCaptureContext ()
> from C:\Windows\SYSTEM32\ntdll.dll
> (gdb) p/x $rax
> $1 = 0x4005d1d68
> (gdb) up
> #1 0x00007ff8cb6f8f27 in ntdll!RtlUnwindEx ()
> from C:\Windows\SYSTEM32\ntdll.dll
> (gdb) up
> #2 0x00007ff8c91d1f4a in msvcrt!_setjmpex ()
> from C:\Windows\System32\msvcrt.dll
> (gdb) up
> #3 0x00000004000a93d4 in quit_throw_to_read_char (
> from_signal=from_signal@entry=false) at keyboard.c:10548
> 10548 sys_longjmp (getcjmp, 1);
> (gdb) p &getcjmp
> $2 = (sys_jmp_buf *) 0x4005d1d68 <main_thread+224>
Yep. How did that happen?..
Can you show a preprocessed version of thread.c, where it does this:
static struct thread_state GCALIGNED main_thread;
Also, what is your GCC version?
- bug#29183: 27.0.50; SIGSEGV on C-g on Windows, John Mastro, 2017/11/06
- bug#29183: 27.0.50; SIGSEGV on C-g on Windows, Eli Zaretskii, 2017/11/06
- bug#29183: 27.0.50; SIGSEGV on C-g on Windows, John Mastro, 2017/11/07
- bug#29183: 27.0.50; SIGSEGV on C-g on Windows,
Eli Zaretskii <=
- bug#29183: 27.0.50; SIGSEGV on C-g on Windows, John Mastro, 2017/11/07
- bug#29183: 27.0.50; SIGSEGV on C-g on Windows, Eli Zaretskii, 2017/11/07
- bug#29183: 27.0.50; SIGSEGV on C-g on Windows, John Mastro, 2017/11/08
- bug#29183: 27.0.50; SIGSEGV on C-g on Windows, Eli Zaretskii, 2017/11/08
- bug#29183: 27.0.50; SIGSEGV on C-g on Windows, Paul Eggert, 2017/11/08
- bug#29183: 27.0.50; SIGSEGV on C-g on Windows, John Mastro, 2017/11/08
- bug#29183: 27.0.50; SIGSEGV on C-g on Windows, Paul Eggert, 2017/11/08
- bug#29183: 27.0.50; SIGSEGV on C-g on Windows, John Mastro, 2017/11/09
bug#29183: 27.0.50; SIGSEGV on C-g on Windows, Davor Rotim, 2017/11/09