glibc/SOURCES/glibc-upstream-2.34-269.patch

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2022-11-15 07:04:49 +00:00
commit a7ec6363a3a8fd7a2014fd7398bcdcab42919ec1
Author: Adhemerval Zanella <adhemerval.zanella@linaro.org>
Date: Tue May 31 17:13:35 2022 -0300
nptl: Fix __libc_cleanup_pop_restore asynchronous restore (BZ#29214)
This was due a wrong revert done on 404656009b459658.
Checked on x86_64-linux-gnu.
(cherry picked from commit c7d36dcecc08a29825175f65c4ee873ff3177a23)
diff --git a/nptl/libc-cleanup.c b/nptl/libc-cleanup.c
index fccb1abe69aa693c..a37c48ff876d613a 100644
--- a/nptl/libc-cleanup.c
+++ b/nptl/libc-cleanup.c
@@ -58,7 +58,8 @@ __libc_cleanup_pop_restore (struct _pthread_cleanup_buffer *buffer)
THREAD_SETMEM (self, cleanup, buffer->__prev);
int cancelhandling = atomic_load_relaxed (&self->cancelhandling);
- if (cancelhandling & CANCELTYPE_BITMASK)
+ if (buffer->__canceltype != PTHREAD_CANCEL_DEFERRED
+ && (cancelhandling & CANCELTYPE_BITMASK) == 0)
{
int newval;
do
diff --git a/sysdeps/pthread/Makefile b/sysdeps/pthread/Makefile
index 5147588c130c9415..d99c161c827ef4b8 100644
--- a/sysdeps/pthread/Makefile
+++ b/sysdeps/pthread/Makefile
@@ -126,6 +126,7 @@ tests += tst-cnd-basic tst-mtx-trylock tst-cnd-broadcast \
tst-pthread-raise-blocked-self \
tst-pthread_kill-exited \
tst-pthread_kill-exiting \
+ tst-cancel30 \
# tests
tests-time64 := \
diff --git a/sysdeps/pthread/tst-cancel30.c b/sysdeps/pthread/tst-cancel30.c
new file mode 100644
index 0000000000000000..e08392f96874de5f
--- /dev/null
+++ b/sysdeps/pthread/tst-cancel30.c
@@ -0,0 +1,82 @@
+/* Check if printf like functions does not disable asynchronous cancellation
+ mode (BZ#29214).
+
+ Copyright (C) 2022 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
+ <https://www.gnu.org/licenses/>. */
+
+#include <support/check.h>
+#include <support/xstdio.h>
+#include <support/xthread.h>
+#include <sys/syscall.h>
+#include <unistd.h>
+
+static pthread_barrier_t b;
+
+static void *
+tf (void *arg)
+{
+ int old;
+
+ TEST_COMPARE (pthread_setcanceltype (PTHREAD_CANCEL_ASYNCHRONOUS, NULL), 0);
+
+ TEST_COMPARE (pthread_setcanceltype (PTHREAD_CANCEL_ASYNCHRONOUS, &old), 0);
+ TEST_COMPARE (old, PTHREAD_CANCEL_ASYNCHRONOUS);
+
+ /* Check if internal lock cleanup routines restore the cancellation type
+ correctly. */
+ printf ("...\n");
+ TEST_COMPARE (pthread_setcanceltype (PTHREAD_CANCEL_ASYNCHRONOUS, &old), 0);
+ TEST_COMPARE (old, PTHREAD_CANCEL_ASYNCHRONOUS);
+
+ xpthread_barrier_wait (&b);
+
+ /* Wait indefinitely for cancellation, which only works if asynchronous
+ cancellation is enabled. */
+#ifdef SYS_pause
+ syscall (SYS_pause);
+#elif defined SYS_ppoll || defined SYS_ppoll_time64
+# ifndef SYS_ppoll_time64
+# define SYS_ppoll_time64 SYS_ppoll
+# endif
+ syscall (SYS_ppoll_time64, NULL, 0, NULL, NULL);
+#else
+ for (;;);
+#endif
+
+ return 0;
+}
+
+static int
+do_test (void)
+{
+ xpthread_barrier_init (&b, NULL, 2);
+
+ pthread_t th = xpthread_create (NULL, tf, NULL);
+
+ xpthread_barrier_wait (&b);
+
+ xpthread_cancel (th);
+
+ void *status = xpthread_join (th);
+ TEST_VERIFY (status == PTHREAD_CANCELED);
+
+ return 0;
+}
+
+/* There is no need to wait full TIMEOUT if asynchronous is not working. */
+#define TIMEOUT 3
+#include <support/test-driver.c>