10153, 10210, 10254, 10346, 10545, 10716, 11174, 11322, 11365, 11451,
11494, 11521, 11837, 11959, 12047, 12340, 13058, 13525, 13526, 13527,
13528, 13529, 13530, 13531, 13532, 13533, 13547, 13551, 13552, 13553,
- 13555, 13559, 13563, 13566, 13583, 13592, 13618, 13637, 13656, 13658,
- 13673, 13691, 13695, 13704, 13705, 13706, 13726, 13738, 13739, 13750,
- 13758, 13760, 13761, 13775, 13786, 13787, 13792, 13806, 13824, 13840,
- 13841, 13844, 13846, 13851, 13852, 13854, 13871, 13872, 13873, 13879,
- 13883, 13884, 13885, 13886, 13892, 13895, 13908, 13910, 13911, 13912,
- 13913, 13914, 13915, 13916, 13917, 13918, 13919, 13920, 13921, 13922,
- 13923, 13924, 13926, 13927, 13928, 13938, 13941, 13942, 13954, 13955,
- 13956, 13963, 13967, 13970, 13973, 13979, 13983, 14012, 14027, 14033,
- 14034, 14040, 14049, 14053, 14055, 14064, 14080, 14083, 14103, 14104
+ 13555, 13559, 13563, 13566, 13583, 13592, 13613, 13618, 13637, 13656,
+ 13658, 13673, 13691, 13695, 13704, 13705, 13706, 13726, 13738, 13739,
+ 13750, 13758, 13760, 13761, 13775, 13786, 13787, 13792, 13806, 13824,
+ 13840, 13841, 13844, 13846, 13851, 13852, 13854, 13871, 13872, 13873,
+ 13879, 13883, 13884, 13885, 13886, 13892, 13895, 13908, 13910, 13911,
+ 13912, 13913, 13914, 13915, 13916, 13917, 13918, 13919, 13920, 13921,
+ 13922, 13923, 13924, 13926, 13927, 13928, 13938, 13941, 13942, 13954,
+ 13955, 13956, 13963, 13967, 13970, 13973, 13979, 13983, 14012, 14027,
+ 14033, 14034, 14040, 14049, 14053, 14055, 14064, 14080, 14083, 14103,
+ 14104
* ISO C11 support:
+2012-05-15 Siddhesh Poyarekar <siddhesh@redhat.com>
+ Jakub Jelinek <jakub@redhat.com>
+
+ [BZ #13613]
+ * Makefile (tests): Add test cases.
+ * descr.h (struct pthread): Add a comment describing multiple_threads.
+ * pthreadP.h (__pthread_multiple_threads): Expand comment to include
+ single-process case.
+ * pthread_cancel.c (pthread_cancel): Enable multiple_threads
+ before setting cancelstate of the thread.
+ * sysdeps/unix/sysv/linux/libc_multiple_threads.c
+ (__libc_multiple_threads): Add explanatory comment.
+ * tst-cancel-self-cancelstate.c: New test case.
+ * tst-cancel-self-canceltype.c: Likewise.
+ * tst-cancel-self-cleanup.c: Supporting file for test cases.
+ * tst-cancel-self-testcancel.c: New test case.
+ * tst-cancel-self.c: Likewise.
+ * vars.c: Expand comment to include single-process case.
+
2012-05-14 H.J. Lu <hongjiu.lu@intel.com>
* sysdeps/x86_64/tls.h: Don't include <bits/wordsize.h>.
tst-cancel11 tst-cancel12 tst-cancel13 tst-cancel14 tst-cancel15 \
tst-cancel16 tst-cancel17 tst-cancel18 tst-cancel19 tst-cancel20 \
tst-cancel21 tst-cancel22 tst-cancel23 tst-cancel24 tst-cancel25 \
+ tst-cancel-self tst-cancel-self-cancelstate \
+ tst-cancel-self-canceltype tst-cancel-self-testcancel \
tst-cleanup0 tst-cleanup1 tst-cleanup2 tst-cleanup3 tst-cleanup4 \
tst-flock1 tst-flock2 \
tst-signal1 tst-signal2 tst-signal3 tst-signal4 tst-signal5 \
#else
struct
{
+ /* multiple_threads is enabled either when the process has spawned at
+ least one thread or when a single-threaded process cancels itself.
+ This enables additional code to introduce locking before doing some
+ compare_and_exchange operations and also enable cancellation points.
+ The concepts of multiple threads and cancellation points ideally
+ should be separate, since it is not necessary for multiple threads to
+ have been created for cancellation points to be enabled, as is the
+ case is when single-threaded process cancels itself.
+
+ Since enabling multiple_threads enables additional code in
+ cancellation points and compare_and_exchange operations, there is a
+ potential for an unneeded performance hit when it is enabled in a
+ single-threaded, self-canceling process. This is OK though, since a
+ single-threaded process will enable async cancellation only when it
+ looks to cancel itself and is hence going to end anyway. */
int multiple_threads;
int gscope_flag;
# ifndef __ASSUME_PRIVATE_FUTEX
const struct pthread_functions *functions)
internal_function;
-/* Variable set to a nonzero value if more than one thread runs or ran. */
+/* Variable set to a nonzero value either if more than one thread runs or ran,
+ or if a single-threaded process is trying to cancel itself. See
+ nptl/descr.h for more context on the single-threaded process case. */
extern int __pthread_multiple_threads attribute_hidden;
/* Pointer to the corresponding variable in libc. */
extern int *__libc_multiple_threads_ptr attribute_hidden;
break;
}
+
+ /* A single-threaded process should be able to kill itself, since there is
+ nothing in the POSIX specification that says that it cannot. So we set
+ multiple_threads to true so that cancellation points get executed. */
+ THREAD_SETMEM (THREAD_SELF, header.multiple_threads, 1);
+#ifndef TLS_MULTIPLE_THREADS_IN_TCB
+ __pthread_multiple_threads = *__libc_multiple_threads_ptr = 1;
+#endif
}
/* Mark the thread as canceled. This has to be done
atomically since other bits could be modified as well. */
#ifndef NOT_IN_libc
# ifndef TLS_MULTIPLE_THREADS_IN_TCB
+/* Variable set to a nonzero value either if more than one thread runs or ran,
+ or if a single-threaded process is trying to cancel itself. See
+ nptl/descr.h for more context on the single-threaded process case. */
int __libc_multiple_threads attribute_hidden;
# endif
#endif
--- /dev/null
+/* Copyright (C) 2012 Free Software Foundation, Inc.
+ This file is part of the GNU C Library.
+
+ 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
+ <http://www.gnu.org/licenses/>. */
+
+#include <pthread.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+#include "tst-cancel-self-cleanup.c"
+
+
+static int
+do_test (void)
+{
+ int ret = 0;
+ volatile int should_fail = 1;
+
+ pthread_cleanup_push (cleanup, &should_fail);
+
+ if ((ret = pthread_setcancelstate (PTHREAD_CANCEL_DISABLE, NULL)) != 0)
+ {
+ printf ("setcancelstate(disable) failed: %s\n", strerror (ret));
+ exit (1);
+ }
+
+ if ((ret = pthread_cancel (pthread_self ())) != 0)
+ {
+ printf ("cancel failed: %s\n", strerror (ret));
+ exit (1);
+ }
+
+ usleep (100);
+ should_fail = 0;
+
+ if ((ret = pthread_setcancelstate (PTHREAD_CANCEL_ENABLE, NULL)) != 0)
+ {
+ printf ("setcancelstate(enable) failed: %s\n", strerror (ret));
+ exit (1);
+ }
+
+ /* The write syscall within this printf should give us our cancellation
+ point. */
+ printf ("Could not cancel self.\n");
+ pthread_cleanup_pop (0);
+
+ return 1;
+}
+
+
+#define TEST_FUNCTION do_test ()
+#include "../test-skeleton.c"
--- /dev/null
+/* Copyright (C) 2012 Free Software Foundation, Inc.
+ This file is part of the GNU C Library.
+
+ 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
+ <http://www.gnu.org/licenses/>. */
+
+#include <pthread.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+#include "tst-cancel-self-cleanup.c"
+
+
+static int
+do_test (void)
+{
+ int ret = 0, should_fail = 0;
+
+ pthread_cleanup_push (cleanup, &should_fail);
+
+ if ((ret = pthread_setcanceltype (PTHREAD_CANCEL_ASYNCHRONOUS, NULL)) != 0)
+ {
+ printf ("setcanceltype failed: %s\n", strerror (ret));
+ exit (1);
+ }
+
+ if ((ret = pthread_cancel (pthread_self ())) != 0)
+ {
+ printf ("cancel failed: %s\n", strerror (ret));
+ exit (1);
+ }
+
+ /* Wait to be canceled. Don't give any cancellation points to play with. */
+ while (1);
+ pthread_cleanup_pop (0);
+
+ return 1;
+}
+
+#define TEST_FUNCTION do_test ()
+#include "../test-skeleton.c"
--- /dev/null
+/* Copyright (C) 2012 Free Software Foundation, Inc.
+ This file is part of the GNU C Library.
+
+ 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
+ <http://www.gnu.org/licenses/>. */
+
+static void
+cleanup (void *cleanup_should_fail)
+{
+ printf ("Main thread got cancelled and is being cleaned up now\n");
+ exit (*(int *)cleanup_should_fail);
+}
--- /dev/null
+/* Copyright (C) 2012 Free Software Foundation, Inc.
+ This file is part of the GNU C Library.
+
+ 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
+ <http://www.gnu.org/licenses/>. */
+
+#include <pthread.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+#include "tst-cancel-self-cleanup.c"
+
+
+static int
+do_test (void)
+{
+ int ret = 0, should_fail = 0;
+
+ pthread_cleanup_push (cleanup, &should_fail);
+ if ((ret = pthread_cancel (pthread_self ())) != 0)
+ {
+ printf ("cancel failed: %s\n", strerror (ret));
+ exit (1);
+ }
+
+ pthread_testcancel ();
+
+ printf ("Could not cancel self.\n");
+ pthread_cleanup_pop (0);
+
+ return 1;
+}
+
+
+#define TEST_FUNCTION do_test ()
+#include "../test-skeleton.c"
--- /dev/null
+/* Copyright (C) 2012 Free Software Foundation, Inc.
+ This file is part of the GNU C Library.
+
+ 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
+ <http://www.gnu.org/licenses/>. */
+
+#include <pthread.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+#include "tst-cancel-self-cleanup.c"
+
+
+static int
+do_test (void)
+{
+ int ret = 0, should_fail = 0;
+
+ pthread_cleanup_push (cleanup, &should_fail);
+ if ((ret = pthread_cancel (pthread_self ())) != 0)
+ {
+ printf ("cancel failed: %s\n", strerror (ret));
+ exit (1);
+ }
+
+ /* The write syscall within this printf should give us our cancellation
+ point. */
+ printf ("Could not cancel self.\n");
+ pthread_cleanup_pop (0);
+
+ return 1;
+}
+
+
+#define TEST_FUNCTION do_test ()
+#include "../test-skeleton.c"
int __is_smp attribute_hidden;
#ifndef TLS_MULTIPLE_THREADS_IN_TCB
-/* Variable set to a nonzero value if more than one thread runs or ran. */
+/* Variable set to a nonzero value either if more than one thread runs or ran,
+ or if a single-threaded process is trying to cancel itself. See
+ nptl/descr.h for more context on the single-threaded process case. */
int __pthread_multiple_threads attribute_hidden;
#endif
projects / thirdparty / glibc.git / commitdiff
