glibc/glibc-upstream-2.34-12.patch
Florian Weimer 330b961e66 Sync with upstream branch release/2.34/master
Upstream commit: 4ed990e5b97a61f29f929bdeb36c5b2abb547a64

- Add MADV_POPULATE_READ and MADV_POPULATE_WRITE from Linux 5.14 to
  bits/mman-linux.h
- Update kernel version to 5.14 in tst-mman-consts.py
- Update syscall lists for Linux 5.14
- Use Linux 5.14 in build-many-glibcs.py
- Fix failing nss/tst-nss-files-hosts-long with local resolver
- iconvconfig: Fix behaviour with --prefix [BZ #28199]
- nptl: Fix race between pthread_kill and thread exit (swbz#12889, #1994068)
- nptl: pthread_kill, pthread_cancel should not fail after exit
  (swbz#19193, #1994068)
- support: Add support_wait_for_thread_exit
- MIPS: Setup errno for {f,l,}xstat
- x86-64: Use testl to check __x86_string_control
- elf: Fix missing colon in LD_SHOW_AUXV output (swbz#28253, #1995648)
- librt: add test (swbz#28213, #1994264)
- CVE-2021-38604: fix NULL pointer dereference in mq_notify
  (swbz#28213, #1994264)
- Linux: Fix fcntl, ioctl, prctl redirects for _TIME_BITS=64 (bug 28182)
- iconv_charmap: Close output file when done
- copy_and_spawn_sgid: Avoid double calls to close()
- gaiconf_init: Avoid double-free in label and precedence lists
- gconv_parseconfdir: Fix memory leak
- ldconfig: avoid leak on empty paths in config file
2021-09-15 15:26:17 +02:00

118 lines
3.7 KiB
Diff

commit addc9d62d61eea790a35328cbfce53333a07bd3e
Author: Florian Weimer <fweimer@redhat.com>
Date: Mon Aug 30 13:43:56 2021 +0200
support: Add support_wait_for_thread_exit
(cherry picked from commit 032d74eaf6179100048a5bf0ce942e97dc8b9a60)
diff --git a/support/Makefile b/support/Makefile
index a462781718426d35..ef2b1a980a407f8f 100644
--- a/support/Makefile
+++ b/support/Makefile
@@ -82,9 +82,10 @@ libsupport-routines = \
support_test_compare_blob \
support_test_compare_failure \
support_test_compare_string \
- support_write_file_string \
support_test_main \
support_test_verify_impl \
+ support_wait_for_thread_exit \
+ support_write_file_string \
temp_file \
timespec \
timespec-time64 \
diff --git a/support/support.h b/support/support.h
index 834dba909770a992..a5978b939af2fb41 100644
--- a/support/support.h
+++ b/support/support.h
@@ -174,6 +174,10 @@ timer_t support_create_timer (uint64_t sec, long int nsec, bool repeat,
/* Disable the timer TIMER. */
void support_delete_timer (timer_t timer);
+/* Wait until all threads except the current thread have exited (as
+ far as the kernel is concerned). */
+void support_wait_for_thread_exit (void);
+
struct support_stack
{
void *stack;
diff --git a/support/support_wait_for_thread_exit.c b/support/support_wait_for_thread_exit.c
new file mode 100644
index 0000000000000000..658a81381006ea62
--- /dev/null
+++ b/support/support_wait_for_thread_exit.c
@@ -0,0 +1,72 @@
+/* Wait until all threads except the current thread has exited.
+ Copyright (C) 2021 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 <dirent.h>
+#include <errno.h>
+#include <string.h>
+#include <support/check.h>
+#include <support/support.h>
+#include <unistd.h>
+
+void
+support_wait_for_thread_exit (void)
+{
+#ifdef __linux__
+ DIR *proc_self_task = opendir ("/proc/self/task");
+ TEST_VERIFY_EXIT (proc_self_task != NULL);
+
+ while (true)
+ {
+ errno = 0;
+ struct dirent *e = readdir (proc_self_task);
+ if (e == NULL && errno != 0)
+ FAIL_EXIT1 ("readdir: %m");
+ if (e == NULL)
+ {
+ /* Only the main thread remains. Testing may continue. */
+ closedir (proc_self_task);
+ return;
+ }
+
+ if (strcmp (e->d_name, ".") == 0 || strcmp (e->d_name, "..") == 0)
+ continue;
+
+ int task_tid = atoi (e->d_name);
+ if (task_tid <= 0)
+ FAIL_EXIT1 ("Invalid /proc/self/task entry: %s", e->d_name);
+
+ if (task_tid == gettid ())
+ /* The current thread. Keep scanning for other
+ threads. */
+ continue;
+
+ /* task_tid does not refer to this thread here, i.e., there is
+ another running thread. */
+
+ /* Small timeout to give the thread a chance to exit. */
+ usleep (50 * 1000);
+
+ /* Start scanning the directory from the start. */
+ rewinddir (proc_self_task);
+ }
+#else
+ /* Use a large timeout because we cannot verify that the thread has
+ exited. */
+ usleep (5 * 1000 * 1000);
+#endif
+}