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* cygheap.cc (init_cygheap::find_tls): Don't consider unitialized threads.

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* cygtls.cc (_cygtls::operator HANDLE): Return NULL when tid is not set.
* exceptions.cc (setup_handler): Don't try to suspend a thread if it has no
handle.
This commit is contained in:
Christopher Faylor
2012-08-16 17:11:41 +00:00
parent 4e754267ed
commit d01efdbe6e
4 changed files with 40 additions and 25 deletions
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48
winsup/cygwin/exceptions.cc
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@@ -846,30 +846,34 @@ setup_handler (int sig, void *handler, struct sigaction& siga, _cygtls *tls)
DWORD res;
HANDLE hth = (HANDLE) *tls;
/* Suspend the thread which will receive the signal.
If one of these conditions is not true we loop.
If the thread is already suspended (which can occur when a program
has called SuspendThread on itself) then just queue the signal. */
sigproc_printf ("suspending thread, tls %p, _main_tls %p", tls, _main_tls);
res = SuspendThread (hth);
/* Just set pending if thread is already suspended */
if (res)
{
ResumeThread (hth);
goto out;
}
cx.ContextFlags = CONTEXT_CONTROL | CONTEXT_INTEGER;
if (!GetThreadContext (hth, &cx))
sigproc_printf ("couldn't get context of thread, %E");
if (!hth)
sigproc_printf ("thread handle NULL, not set up yet?");
else
interrupted = tls->interrupt_now (&cx, sig, handler, siga);
{
/* Suspend the thread which will receive the signal.
If one of these conditions is not true we loop.
If the thread is already suspended (which can occur when a program
has called SuspendThread on itself) then just queue the signal. */
tls->unlock ();
ResumeThread (hth);
if (interrupted)
goto out;
sigproc_printf ("suspending thread, tls %p, _main_tls %p", tls, _main_tls);
res = SuspendThread (hth);
/* Just set pending if thread is already suspended */
if (res)
{
ResumeThread (hth);
goto out;
}
cx.ContextFlags = CONTEXT_CONTROL | CONTEXT_INTEGER;
if (!GetThreadContext (hth, &cx))
sigproc_printf ("couldn't get context of thread, %E");
else
interrupted = tls->interrupt_now (&cx, sig, handler, siga);
tls->unlock ();
ResumeThread (hth);
if (interrupted)
goto out;
}
sigproc_printf ("couldn't interrupt. trying again.");
yield ();