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Bug#575351: marked as done (-fexceptions and unwind)

Your message dated Mon, 14 Mar 2016 18:42:01 +0100
with message-id <20160314174201.GA25399@aurel32.net>
and subject line Re: Bug#575351: [HPPA] This is not the bug of GCC but glibc
has caused the Debian Bug report #575351,
regarding -fexceptions and unwind
to be marked as done.

This means that you claim that the problem has been dealt with.
If this is not the case it is now your responsibility to reopen the
Bug report if necessary, and/or fix the problem forthwith.

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-- 
575351: http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=575351
Debian Bug Tracking System
Contact owner@bugs.debian.org with problems
--- Begin Message --- 
Package: gcc-4.4-hppa-linux-gnu
Severity: normal

I think that I found (when debugging Boehm GC) a gcc bug on hppa.

Attached is a testcase program, test-pthread-cancel.c.

I test it on paer.debian.org, where the kernel is:
Linux version 2.6.32-3-parisc64 (Debian 2.6.32-9) (maks@debian.org) (gcc version 4.3.4 (GCC) ) #1 Thu Feb 25 13:08:44 UTC 2010

$ gcc -pthread test-pthread-cancel.c
$ ./a.out
clean it up
$ gcc -pthread test-pthread-cancel.c -fexceptions
$ ./a.out
$
# No output

On i486-pc-linux-gnu, we see output for both cases (with/without
-fexceptions).

It seems that signal handling has been changed after
gcc-4.4.3/gcc/config/pa/linux-unwind.h was written.

We can see the value 0x34190000 at the register rp, but not at
the register sp.

----------------------------------- test-pthread-cancel.c
#include <pthread.h>
#include <time.h>
#include <stdio.h>

static void
clean(void *arg)
{
  puts ("clean it up");
}

static void *
f(void *arg)
{
  struct timespec t;
  t.tv_sec = 0;
  t.tv_nsec = 1000;

  pthread_cleanup_push (clean, NULL);

  while (1)
    nanosleep (&t, NULL);

  pthread_cleanup_pop(1);
}

int
main (int argc, char argv[])
{
  struct timespec t;
  t.tv_sec = 0;
  t.tv_nsec = 10000;

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

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

--- End Message ---
--- Begin Message --- 
Version: 2.17-1

On 2010-03-29 09:14, Carlos O'Donell wrote:
> On Mon, Mar 29, 2010 at 5:28 AM, NIIBE Yutaka <gniibe@fsij.org> wrote:
> > I am looking the file:
> > eglibc-2.10.2/ports/sysdeps/unix/sysv/linux/hppa/nptl/sysdep-cancel.h
> >
> > It doesn't have any cfi directives.  I think that it is the cause
> > of this problem.
> >
> > When adding cfi directives, it would be good to add nocancel version
> > of functions.
> 
> I have now added cfi directives to both sysdep.h and sysdep-cancel.h
> for all assembly wrappers used by glibc. In addition I have also
> provided a nocancel version in sysdep-cancel.h.
> 
> Once I finish testing the cfi directives I'll push this into
> libc-ports and debian can pull the changeset.

Carlos has pushed his changed in upstream version 2.15. This means they
first appear in Debian with version 2.17-1.

I am therefore closing the bug.

-- 
Aurelien Jarno                          GPG: 4096R/1DDD8C9B
aurelien@aurel32.net                 http://www.aurel32.net

--- End Message ---
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