Mail Archives: cygwin/2001/12/07/17:47:42
Try continuing. There is some memory access checks in place, that will
return a error to the app, but under a debugger throw a segv.
Rob
===
----- Original Message -----
From: "Evan Pollan" <evan_pollan AT yahoo DOT com>
To: <cygwin AT cygwin DOT com>
Sent: Friday, December 07, 2001 2:23 PM
Subject: Segmentation fault when using gdb & pthreads
> All--
>
> I posted this a few weeks back and didn't get any response. I've
searched
> the
> archives and haven't seen anything helpful, so I'm reposting...
>
> I'm trying to use gdb on a simple pthreads app. The app runs fine, but
I
> wanted
> to give the gdb a test drive. However, whenever I step into or over
any
> pthread code, I get a segmentation fault. In my case, a call to
> pthread_cond_init() causes the SIGSEGV.
>
> The code is compiled w/ -g, and I can step through the execution for
> everything
> up to the pthreads code. Is this a limitation w/ gdb or am I missing
either
> a
> compilation or debugging flag? I'm using the full cygwin distribution
as of
> cygwin-1.3.5-3 on Win2000.
>
> Here's the seg fault as it appears when I encounter the
pthread_cond_init()
> call:
>
> (gdb) run
> Starting program:
> /cygdrive/c/home/Evan/src/c++/QueueProcessor/Driver.exe
>
> Breakpoint 1, QueueProcessor::QueueProcessor (this=0x22fd54)
> at QueueProcessor.cpp:39
> 39 {
> Current language: auto; currently c++
> (gdb) step
> 41 rc = pthread_cond_init(&_condition, NULL);
> (gdb) print rc
> $1 = 0
> (gdb) step
>
> Program received signal SIGSEGV, Segmentation fault.
> 0x77e86e72 in _libkernel32_a_iname ()
> (gdb)
>
>
> thanks for the help,
> Evan
>
>
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