Mail Archives: cygwin-developers/2001/09/11/21:14:29
On Tue, Sep 11, 2001 at 08:40:19PM -0400, Jason Tishler wrote:
> On Wed, Sep 12, 2001 at 09:19:19AM +1000, Robert Collins wrote:
> > If it was after the bugfix commit, I'd like to see if we can track this
> > asap...
>
> I can reproduce it frequently but not every time. I will debug it first
> thing tomorrow morning. FYI, it seems to occur right near the end of
> the test and the test still passes.
Doh! My first shot running broadcast from gdb caused the SIGSEGV:
(gdb) run
Starting program: /home/jt/src/PthreadTest-0.1/broadcast.exe
before cond wait
..
before cond broadcast
after cond broadcast
after cond wait
Program received signal SIGSEGV, Segmentation fault.
[Switching to thread 1804.0x2dc]
0x6100f0cb in call_signal_handler_now ()
at ../../../../src/winsup/cygwin/exceptions.cc:1132
1132 *sigsave.retaddr_on_stack = sigsave.retaddr;
Current language: auto; currently c++
(gdb) bt
#0 0x6100f0cb in call_signal_handler_now ()
at ../../../../src/winsup/cygwin/exceptions.cc:1132
#1 0x6100f12e in sigframe::call_signal_handler (this=0x1e06f360)
at ../../../../src/winsup/cygwin/exceptions.cc:1146
#2 0x6104ff64 in sleep (seconds=2)
at ../../../../src/winsup/cygwin/signal.cc:84
#3 0x004011fe in baby () at broadcast.c:56
#4 0x61063b6c in thread_init_wrapper (_arg=0xa011588)
at ../../../../src/winsup/cygwin/thread.cc:865
#5 0x77e837cd in _cygheap_start ()
(gdb) list
1127 static int __stdcall
1128 call_signal_handler_now ()
1129 {
1130 int sa_flags = sigsave.sa_flags;
1131 sigproc_printf ("sa_flags %p", sa_flags);
1132 *sigsave.retaddr_on_stack = sigsave.retaddr;
1133 sigdelayed0 ();
1134 return sa_flags & SA_RESTART;
1135 }
1136 /* This kludge seems to keep a copy of call_signal_handler_now around
(gdb) p sigsave.retaddr_on_stack
$1 = (DWORD *) 0x0
I really have to go now. I will pick this up first thing in the morning
assuming that I'm not still in the dog house... No cable modem there... :,)
Jason
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