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Date:	Mon, 7 Apr 2014 11:12:07 +0200
From:	Corinna Vinschen <corinna-cygwin AT cygwin DOT com>
To:	cygwin AT cygwin DOT com
Subject:	Re: exe.stackdump is always empty
Message-ID:	<20140407091207.GE2061@calimero.vinschen.de>
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On Apr  4 22:07, Lavrentiev, Anton (NIH/NLM/NCBI) [C] wrote:
> Any ideas, please?
>=20
> > http://cygwin.com/problems.html
> > http://cygwin.com/acronyms/#STC
>=20
> $ cat assert.c
> #include <assert.h>
>=20
> int main(void)
> { assert(0);
>   return 0;
> }
>=20
> $ ulimit -a
> core file size          (blocks, -c) unlimited
> data seg size           (kbytes, -d) unlimited
> file size               (blocks, -f) unlimited
> open files                      (-n) 256
> pipe size            (512 bytes, -p) 8
> stack size              (kbytes, -s) 2025
> cpu time               (seconds, -t) unlimited
> max user processes              (-u) 256
> virtual memory          (kbytes, -v) unlimited
>=20
> $ gcc -g assert.c
>=20
> $ ./a.exe
> assertion "0" failed: file "assert.c", line 4, function: main
> Aborted (core dumped)
>=20
> $ cat a.exe.stackdump
> Stack trace:
> Frame     Function  Args

Hmm, not me.  In my case a stackdump is generated, albeit not very
complete:

  $ cat assert.exe.stackdump
  Stack trace:
  Frame     Function  Args
  0028A898  610303D2 (000000B4, 0000EA60, 000000A4, 0028A8E8)
  0028A9A8  610DA4DD (75D2E158, 00000000, 6E00016F, 00000000)

The 64 bit stackdump looks better:

  $ cat assert.exe.stackdump
  Stack trace:
  Frame        Function    Args
  0000023A480  0018006F733 (7FF9E9680EBF, 00000000000, 00000000003, 0000000=
0016)
  00000000006  00180070C6A (0000023A940, 00000000000, 0000000009C, 00000000=
000)
  0000023A660  0018011AEE8 (00000341B10, 00000000000, 00000000000, 00000000=
000)
  000000000C1  00180117FEE (00300000000, 00000000000, 00000000000, 00000000=
000)
  0000023AAB0  001801184BB (7FF9E967ED89, 00000000000, 00100403032, 0000000=
0006)
  0000023AAB0  0018011868C (7FF9E6A9151B, 00000004048, 001801EE0D8, 0018011=
CB7C)
  0000023AAB0  0018011894F (00100403030, 00100403032, 00000000004, 001801EE=
02F)
  0000023AAB0  00180041B45 (00000000000, 00000000000, 00000000000, 0000023A=
B90)
  0000023AAE0  001004010FC (00000000020, 30001000000FF00, 0018004819A, 0000=
0000000)
  0000023AB90  0018004820B (00000000000, 00000000000, 00000000000, 00000000=
000)
  00000000000  0018004611B (00000000000, 00000000000, 00000000000, 00000000=
000)
  00000000000  00180046274 (00000000000, 00000000000, 00000000000, 00000000=
000)
  00000000000  00100401111 (00000000000, 00000000000, 00000000000, 00000000=
000)
  00000000000  00100401010 (00000000000, 00000000000, 00000000000, 00000000=
000)
  00000000000  7FF9E93115DD (00000000000, 00000000000, 00000000000, 0000000=
0000)
  00000000000  7FF9E96B43D1 (00000000000, 00000000000, 00000000000, 0000000=
0000)
  End of stack trace (more stack frames may be present)

but I'm not exactly an expert in how to generate a stackdump on i686.


Corinna

--=20
Corinna Vinschen                  Please, send mails regarding Cygwin to
Cygwin Maintainer                 cygwin AT cygwin DOT com
Red Hat

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