htl: Make sem_*wait cancellations points

By aligning its implementation on pthread_cond_wait.

* sysdeps/htl/sem-timedwait.c (cancel_ctx): New structure.
(cancel_hook): New function.
(__sem_timedwait_internal): Check for cancellation and register
cancellation hook that wakes the thread up, and check again for
cancellation on exit.
* nptl/tst-cancel13.c, nptl/tst-cancelx13.c: Move to...
* sysdeps/pthread/: ... here.
* nptl/Makefile: Move corresponding references and rules to...
* sysdeps/pthread/Makefile: ... here.

3 files changed, 1 insertions, 131 deletions

diff --git a/nptl/Makefile b/nptl/Makefile
index 24ebd07..4602824 100644
--- a/nptl/Makefile
+++ b/nptl/Makefile
@@ -278,7 +278,7 @@ tests = tst-attr2 tst-attr3 tst-default-attr \
 	tst-sem17 \
 	tst-tsd3 tst-tsd4 \
 	tst-cancel4 tst-cancel4_1 tst-cancel4_2 tst-cancel5 \
-	tst-cancel7 tst-cancel13 \
+	tst-cancel7 \
 	tst-cancel16 tst-cancel17 tst-cancel20 tst-cancel24 \
 	tst-cleanup4 \
 	tst-signal3 \
@@ -358,7 +358,6 @@ endif
 LDFLAGS-pthread.so = -Wl,--enable-new-dtags,-z,nodelete,-z,initfirst
 
 tests += tst-cancelx4 tst-cancelx5 tst-cancelx7 \
-	 tst-cancelx13 \
 	 tst-cancelx16 tst-cancelx17 tst-cancelx20 \
 	 tst-cleanupx4
 
@@ -477,7 +476,6 @@ CFLAGS-tst-cancelx5.c += -Wno-error
 CFLAGS-tst-cancelx4.c += -fexceptions
 CFLAGS-tst-cancelx5.c += -fexceptions
 CFLAGS-tst-cancelx7.c += -fexceptions
-CFLAGS-tst-cancelx13.c += -fexceptions
 CFLAGS-tst-cancelx16.c += -fexceptions
 CFLAGS-tst-cancelx17.c += -fexceptions
 CFLAGS-tst-cancelx20.c += -fexceptions -fasynchronous-unwind-tables
diff --git a/nptl/tst-cancel13.c b/nptl/tst-cancel13.c
deleted file mode 100644
index 0b0086c..0000000
--- a/nptl/tst-cancel13.c
+++ /dev/null
@@ -1,127 +0,0 @@
-/* Test sem_wait cancellation for contended case.
-   Copyright (C) 2003-2020 Free Software Foundation, Inc.
-   This file is part of the GNU C Library.
-   Contributed by Ulrich Drepper <drepper@redhat.com>, 2003.
-
-   The GNU C Library is free software; you can redistribute it and/or
-   modify it under the terms of the GNU Lesser General Public
-   License as published by the Free Software Foundation; either
-   version 2.1 of the License, or (at your option) any later version.
-
-   The GNU C Library is distributed in the hope that it will be useful,
-   but WITHOUT ANY WARRANTY; without even the implied warranty of
-   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
-   Lesser General Public License for more details.
-
-   You should have received a copy of the GNU Lesser General Public
-   License along with the GNU C Library; if not, see
-   <https://www.gnu.org/licenses/>.  */
-
-#include <errno.h>
-#include <pthread.h>
-#include <semaphore.h>
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-#include <unistd.h>
-
-
-static pthread_barrier_t bar;
-static sem_t sem;
-
-
-static void
-cleanup (void *arg)
-{
-  static int ncall;
-
-  if (++ncall != 1)
-    {
-      puts ("second call to cleanup");
-      exit (1);
-    }
-}
-
-
-static void *
-tf (void *arg)
-{
-  pthread_cleanup_push (cleanup, NULL);
-
-  int e = pthread_barrier_wait (&bar);
-  if (e != 0 && e != PTHREAD_BARRIER_SERIAL_THREAD)
-    {
-      puts ("error: tf: 1st barrier_wait failed");
-      exit (1);
-    }
-
-  /* This call should block and be cancelable.  */
-  sem_wait (&sem);
-
-  pthread_cleanup_pop (0);
-
-  return NULL;
-}
-
-
-static int
-do_test (void)
-{
-  pthread_t th;
-
-  if (pthread_barrier_init (&bar, NULL, 2) != 0)
-    {
-      puts ("error: barrier_init failed");
-      exit (1);
-    }
-
-  /* A value equal to 0 will check for contended pthread cancellation,
-     where the sem_wait operation will block.  */
-  if (sem_init (&sem, 0, 0) != 0)
-    {
-      puts ("error: sem_init failed");
-      exit (1);
-    }
-
-  if (pthread_create (&th, NULL, tf, NULL) != 0)
-    {
-      puts ("error: create failed");
-      exit (1);
-    }
-
-  int e = pthread_barrier_wait (&bar);
-  if (e != 0 && e != PTHREAD_BARRIER_SERIAL_THREAD)
-    {
-      puts ("error: 1st barrier_wait failed");
-      exit (1);
-    }
-
-  /* Give the child a chance to go to sleep in sem_wait.  */
-  sleep (1);
-
-  /* Check whether cancellation is honored when waiting in sem_wait.  */
-  if (pthread_cancel (th) != 0)
-    {
-      puts ("error: 1st cancel failed");
-      exit (1);
-    }
-
-  void *r;
-  if (pthread_join (th, &r) != 0)
-    {
-      puts ("error: join failed");
-      exit (1);
-    }
-
-  if (r != PTHREAD_CANCELED)
-    {
-      puts ("thread not canceled");
-      exit (1);
-    }
-
-  return 0;
-}
-
-
-#define TEST_FUNCTION do_test ()
-#include "../test-skeleton.c"
diff --git a/nptl/tst-cancelx13.c b/nptl/tst-cancelx13.c
deleted file mode 100644
index 37c4c39..0000000
--- a/nptl/tst-cancelx13.c
+++ /dev/null
@@ -1 +0,0 @@
-#include "tst-cancel13.c"