This is the mail archive of the
glibc-bugs@sourceware.org
mailing list for the glibc project.
[Bug ports/14266] New: tile: -fexceptions breaks pthread_cancel()
- From: "cmetcalf at tilera dot com" <sourceware-bugzilla at sourceware dot org>
- To: glibc-bugs at sources dot redhat dot com
- Date: Tue, 19 Jun 2012 16:31:29 +0000
- Subject: [Bug ports/14266] New: tile: -fexceptions breaks pthread_cancel()
- Auto-submitted: auto-generated
http://sourceware.org/bugzilla/show_bug.cgi?id=14266
Bug #: 14266
Summary: tile: -fexceptions breaks pthread_cancel()
Product: glibc
Version: 2.15
Status: NEW
Severity: normal
Priority: P2
Component: ports
AssignedTo: unassigned@sourceware.org
ReportedBy: cmetcalf@tilera.com
CC: carlos@systemhalted.org, roland@gnu.org
Classification: Unclassified
The appended program works fine if you build it with "gcc cancel.c -pthread".
It creates a thread that blocks on stdin in a "pthread_cleanup_push()" context.
The main thread then cancels it, at which point the created thread calls the
cancel handler and returns. However, if you add "-fexceptions" (or,
equivalently, build the program with g++ instead of gcc) the cancellation
handler doesn't get called. This works fine on x86.
It's not clear if this is gcc or glibc bug, but I'm filing it as a glibc bug
for now, since there don't seem to be any similar failures in the gcc
testsuite.
This failure mode breaks the following glibc tests:
nptl/tst-cancel24.out
nptl/tst-cancelx4.out
nptl/tst-cancelx5.out
nptl/tst-cancelx16.out
nptl/tst-cancelx17.out
nptl/tst-cancelx18.out
nptl/tst-cancelx20.out
nptl/tst-cancelx21.out
nptl/tst-cleanupx0.out
nptl/tst-cleanupx1.out
nptl/tst-cleanupx3.out
nptl/tst-cleanupx4.out
nptl/tst-oncex3.out
nptl/tst-oncex4.out
rt/tst-mqueue8x.out
#include <unistd.h>
#include <pthread.h>
#include <stdio.h>
/* Cleanup handling test. */
static int cl_called;
static void
cl (void *arg)
{
printf("in cl\n");
++cl_called;
}
void *tf(void *arg)
{
char c;
printf("in tf\n");
pthread_cleanup_push (cl, NULL);
printf("waiting on stdin\n");
read(0, &c, 1);
pthread_cleanup_pop (0);
}
int main()
{
pthread_t th;
pthread_create(&th, NULL, tf, NULL);
sleep(1);
printf("cancelling\n");
pthread_cancel(th);
sleep(1);
printf("%d\n", cl_called);
return 0;
}
--
Configure bugmail: http://sourceware.org/bugzilla/userprefs.cgi?tab=email
------- You are receiving this mail because: -------
You are on the CC list for the bug.