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Old 03-29-2010, 05:56 AM
NIIBE Yutaka
 
Default Bug#575351: This is not the bug of GCC but glibc

No, this is not the bug of GCC. Alhough config/pa/linux-unwind.h
looks incorrect at first glance (TRAMP_SIZE is 9), it runs correctly
(because of padding).

In fact, following program runc correctly on hppa too, we see
"clean it up".

$ gcc -fexceptions -save-temps func.c test-pthread-cancel-3.c -pthread
$ ./a.out

I think that the bug is in GNU C library port of hppa.

------------------ func.c
void func (void)
{
for (;;
}
------------------ test-pthread-cancel-3.c
#include <pthread.h>
#include <time.h>

static void
clean(void *arg)
{
write (1, "clean it up
", 12);
}

extern void func(void);

static void *
f(void *arg)
{
pthread_cleanup_push (clean, NULL);
pthread_setcanceltype (PTHREAD_CANCEL_ASYNCHRONOUS, NULL);
for (;
func ();
pthread_setcanceltype (PTHREAD_CANCEL_DEFERRED, NULL);

pthread_cleanup_pop(1);
}

int
main (int argc, char argv[])
{
struct timespec t;
t.tv_sec = 1;
t.tv_nsec = 0;

pthread_t tid;
pthread_create (&tid, NULL, f, NULL);

nanosleep (&t, NULL);
pthread_cancel (tid);
pthread_join (tid, NULL);
}
------------------
--



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