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Message-ID: <3FF1F041.9010506@zoominternet.net>
Date: Tue, 30 Dec 2003 16:38:09 -0500
From: Robert Baruch <autophile AT zoominternet DOT net>
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To: cygwin AT cygwin DOT com
Subject: help: dumper 1.10 not giving expected stack trace in gdb
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Hi all,

I've compiled a simple C program, t.c, via gcc-3.3.1, with -g:

#include <stdio.h>

int main(void)
{
  abort();
}

I've set CYGWIN='error_start=C:\cygwin\bin\dumper.exe'. So when I run 
the program, abort causes dumper to run, and I end up with a 
t.exe.stackdump file and a t.exe.core file.

The stackdump file contains this:

Stack trace:
Frame     Function  Args
0022FD08  6106F232  (000009E4, 00000006, 0022FD78, 0040120D)
0022FD58  6106F3B0  (000009E4, 00000006, 0022FDA8, 6106F965)
0022FD68  6106F2FC  (00000006, 00000006, 0022FD98, 61003A31)
0022FDA8  6106F965  (0022FDC0, 610850F8, 610F063C, 00000000)
0022FDC0  00401073  (00000001, 0A041AE8, 0A040330, 61062452)
0022FF40  61005018  (610CFEE0, FFFFFFFE, 000007E4, 610CFE04)
0022FF90  610052ED  (00000000, 00000000, 00000001, 00000000)
0022FFB0  00401401  (00401050, 037F0009, 0022FFF0, 77E814C7)
0022FFC0  0040103C  (77F58A3A, 00000000, 7FFDF000, F359BCF0)
0022FFF0  77E814C7  (00401000, 00000000, 78746341, 00000020)
End of stack trace

However, when I run gdb 2003-09-20-cvs (cygwin-special) on the core 
file, I get this:

$ gdb --core=t.exe.core
GNU gdb 2003-09-20-cvs (cygwin-special)
Copyright 2003 Free Software Foundation, Inc.
GDB is free software, covered by the GNU General Public License, and you are
welcome to change it and/or distribute copies of it under certain 
conditions.
Type "show copying" to see the conditions.
There is absolutely no warranty for GDB.  Type "show warranty" for details.
This GDB was configured as "i686-pc-cygwin".
#0  0x7ffe0304 in ?? ()
(gdb) where
#0  0x7ffe0304 in ?? ()
#1  0x77f5c534 in ntdll!ZwWaitForSingleObject ()
#2  0x77e7a62d in WaitForSingleObjectEx ()
#3  0x00000778 in ?? ()

That doesn't look anything like the stack dump shown in the stackdump file.

What am I missing? How can I get gdb to display the proper stack trace?

I appreciate any help you can give.

Thanks,

--Rob


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