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Message-ID: <405CAFB8.5000209@kegel.com>
Date: Sat, 20 Mar 2004 12:55:20 -0800
From: Dan Kegel <dank@kegel.com>
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To: cygwin@cygwin.com
Subject: Re: Minimal test case for Make crash bug
References: <405C00BF.3090507@kegel.com> <405C06C4.7030508@kegel.com> <405C6C4B.90409@kegel.com> <405C939E.5020909@kegel.com> <405C9695.2010609@kegel.com>
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Dan Kegel wrote:
> Sadly, error_start didn't seem to be able to start gdb:

Thanks to Igor for pointing out that error_start must be a
DOS path.  Here's what I see once I correct that:

$ export CYGWIN=error_start:C:\\cygwin\\bin\\gdb.exe
$ make
...
(gdb) bt
#0  0x77f75a59 in ntdll!DbgUiConnectToDbg ()
    from /cygdrive/c/WINDOWS/System32/ntdll.dll
#1  0x77f5f31f in ntdll!KiUserCallbackDispatcher ()
    from /cygdrive/c/WINDOWS/System32/ntdll.dll
#2  0x00000005 in ?? ()
#3  0x00000004 in ?? ()
#4  0x00000001 in ?? ()
#5  0x006effd0 in ?? ()
#6  0x82ba40e8 in ?? ()
#7  0xffffffff in ?? ()
#8  0x77fa88f0 in wcstombs () from /cygdrive/c/WINDOWS/System32/ntdll.dll

Unfortunately, that's also about what I see when I do
$ export CYGWIN=error_start:C:\\cygwin\\bin\\gdb.exe
$ ./a.exe

where a.exe is the following compiled with cygwin's gcc:
#include <stdio.h>
int main(int argc, char **argv)
{
         int *x;
         x = 0;
         printf("Null is %d\n", *x);
}

Looking at the other two threads (why are there three?)
doesn't help.

The stackdump file seems more informative than the gdb
started with error_start.  Has anyone used gdb from
this context with success lately?  gdb has no problem
with a.exe when run normally.
- Dan


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