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Bug in testsuite/gdb.base/tls.c
- From: Michael Elizabeth Chastain <mec at shout dot net>
- To: ezannoni at redhat dot com
- Cc: gdb at sources dot redhat dot com
- Date: Tue, 29 Jul 2003 16:07:09 -0400
- Subject: Bug in testsuite/gdb.base/tls.c
I'm seeing a lot of test suite hangs with the new tls.c.
I tracked it down to this code:
for( i = 0; i < N_THREADS; i++ )
{
do
{
errno = 0;
if (sem_wait (&tell_main) == -1)
{
if (errno != EINTR)
{
...
return;
}
...
}
}
while (errno == EINTR);
}
It turns out that errno can be EINTR even when the return value is 0!
That screws up the loop counter.
This happened with Red Hat Linux 8, glibc 2.2.93-5-rh. It is sensitive
to the placement of breakpoints, which is not surprising.
I think it's normal Unix semantics that when the return value is zero,
errno has no meaning.
I'll code up a patch for tls.c, on those lines.
Michael C