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Date: Wed, 15 Jul 2009 23:07:10 +0100
From: Dave Korn <dave DOT korn DOT cygwin AT googlemail DOT com>
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To: Steven Hartland <killing AT multiplay DOT co DOT uk>
CC: Dave Korn <dave DOT korn DOT cygwin AT googlemail DOT com>, cygwin AT cygwin DOT com
Subject: Re: perl threads on 2008 R2 64bit = crash ( was: perl 5.10 threads   	on 1.5.25 = instant crash )
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Steven Hartland wrote:
> 
> ----- Original Message ----- From: "Dave Korn"
>> (gdb) b 113 if ((*object) == 0)
>> No symbol "object" in current context.
>> (gdb)
>>
>>  Ah, that's bad.  It might work on a DLL compiled with -O0 -g, but
>> here we
>> have a problem that the function gets inlined everywhere it's called.  So
>> instead I set an unconditional breakpoint there and let it run until I
>> hit it:
> 
> From my experience last night you should be able to use something like:-
> b 113 if ( 0 == (**(verifyable_object **)objectptr)

  I did try it, but objectptr was out of scope as well.  I'm using 1.7 and
gcc-4.3.2, so it might well be that there's more inlining going on for me than
for you, or changes in the debug info generation that account for it.

> If not here at least it hits that break ~ 280 times before blowing up so
> setting a conditional on that occurrence should help.

  :) That's the general idea!

    cheers,
      DaveK

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