On 06/06/14 12:40 +0200, Uros Bizjak wrote:
On Fri, Jun 6, 2014 at 11:19 AM, Jonathan Wakely <jwak...@redhat.com> wrote:
On 06/06/14 10:27 +0200, Uros Bizjak wrote:
These two tests timeout on alpha-linux-gnu:
FAIL: 30_threads/async/forced_unwind.cc execution test
WARNING: program timed out.
FAIL: 30_threads/packaged_task/forced_unwind.cc execution test
WARNING: program timed out.
Sorry about that, I don't know why.
Does pthread_exit(0) use a __forced_unwind exception on
alpha-linux-gnu? This should tell you ...
#include <bits/cxxabi_forced.h>
#include <pthread.h>
void* f(void*) {
try
{
pthread_exit(0);
}
catch (__cxxabiv1::__forced_unwind const&)
{
__builtin_puts("unwind");
throw;
}
catch (...)
{
__builtin_puts("something else");
throw;
}
}
int main()
{
pthread_t t;
pthread_create(&t, 0, f, 0);
pthread_join(t, 0);
}
Strange, I don't get anything ...
$ g++ -lpthread pt.C
$ ./a.out
That explains it then: the thread just goes away, and the waiting
function hangs forever expecting the future to be made ready.
The test assumes pthread_exit is implemented by throwing
__forced_unwind, which apparently isn't true for all glibc targets.
If the thread just goes away there's no way to make the future ready.
I guess we should just XFAIL it for alpha, and maybe other targets.
