From: Adhemerval Zanella via Libc-alpha <libc-alpha@sourceware.org>
To: libc-alpha@sourceware.org
Cc: Florian Weimer <fweimer@redhat.com>
Subject: [PATCH v2 07/19] support: Add support_wait_for_thread_exit
Date: Mon, 23 Aug 2021 16:50:35 -0300 [thread overview]
Message-ID: <20210823195047.543237-8-adhemerval.zanella@linaro.org> (raw)
In-Reply-To: <20210823195047.543237-1-adhemerval.zanella@linaro.org>
From: Florian Weimer <fweimer@redhat.com>
Wait until all threads except the current thread has exited.
---
support/Makefile | 3 +-
support/support.h | 4 ++
support/support_wait_for_thread_exit.c | 72 ++++++++++++++++++++++++++
3 files changed, 78 insertions(+), 1 deletion(-)
create mode 100644 support/support_wait_for_thread_exit.c
diff --git a/support/Makefile b/support/Makefile
index a462781718..ef2b1a980a 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 834dba9097..a5978b939a 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 0000000000..658a813810
--- /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
+}
--
2.30.2
next prev parent reply other threads:[~2021-08-23 19:58 UTC|newest]
Thread overview: 68+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-08-23 19:50 [PATCH v2 00/19] Fix various NPTL synchronization issues Adhemerval Zanella via Libc-alpha
2021-08-23 19:50 ` [PATCH v2 01/19] nptl: Fix tst-cancel7 and tst-cancelx7 race condition (BZ #14232) Adhemerval Zanella via Libc-alpha
2021-08-26 9:33 ` Florian Weimer via Libc-alpha
2021-08-23 19:50 ` [PATCH v2 02/19] nptl: Set cancellation type and state on pthread_exit Adhemerval Zanella via Libc-alpha
2021-08-26 9:38 ` Florian Weimer via Libc-alpha
2021-08-26 9:42 ` Florian Weimer via Libc-alpha
2021-08-26 11:56 ` Adhemerval Zanella via Libc-alpha
2021-08-26 11:52 ` Adhemerval Zanella via Libc-alpha
2021-08-26 12:08 ` Florian Weimer via Libc-alpha
2021-08-23 19:50 ` [PATCH v2 03/19] nptl: Handle robust PI mutexes for !__ASSUME_SET_ROBUST_LIST Adhemerval Zanella via Libc-alpha
2021-08-26 9:42 ` Florian Weimer via Libc-alpha
2021-08-26 12:14 ` Adhemerval Zanella via Libc-alpha
2021-08-23 19:50 ` [PATCH v2 04/19] nptl: Do not use pthread set_tid_address as state synchronization (BZ #19951) Adhemerval Zanella via Libc-alpha
2021-08-26 10:41 ` Florian Weimer via Libc-alpha
2021-08-26 14:58 ` Adhemerval Zanella via Libc-alpha
2021-08-26 15:06 ` Florian Weimer via Libc-alpha
2021-08-26 16:16 ` Adhemerval Zanella via Libc-alpha
2021-08-30 10:42 ` Florian Weimer via Libc-alpha
2021-08-23 19:50 ` [PATCH v2 05/19] nptl: Move setxid flag out of cancelhandling Adhemerval Zanella via Libc-alpha
2021-08-26 11:34 ` Florian Weimer via Libc-alpha
2021-08-26 15:11 ` Adhemerval Zanella via Libc-alpha
2021-08-26 15:21 ` Florian Weimer via Libc-alpha
2021-08-26 16:39 ` Adhemerval Zanella via Libc-alpha
2021-08-30 11:27 ` Florian Weimer via Libc-alpha
2021-08-23 19:50 ` [PATCH v2 06/19] nptl: Replace struct thread cancelhandling field Adhemerval Zanella via Libc-alpha
2021-08-26 14:34 ` Florian Weimer via Libc-alpha
2021-08-26 16:48 ` Adhemerval Zanella via Libc-alpha
2021-08-30 10:36 ` Florian Weimer via Libc-alpha
2021-08-23 19:50 ` Adhemerval Zanella via Libc-alpha [this message]
2021-08-26 9:31 ` [PATCH v2 07/19] support: Add support_wait_for_thread_exit Florian Weimer via Libc-alpha
2021-08-26 16:49 ` Adhemerval Zanella via Libc-alpha
2021-08-30 11:46 ` Florian Weimer via Libc-alpha
2021-08-23 19:50 ` [PATCH v2 08/19] nptl: pthread_kill, pthread_cancel should fail after exit (bug 19193) Adhemerval Zanella via Libc-alpha
2021-08-26 10:03 ` Florian Weimer via Libc-alpha
2021-08-26 16:49 ` Adhemerval Zanella via Libc-alpha
2021-08-23 19:50 ` [PATCH v2 09/19] nptl: Fix race between pthread_kill and thread exit (bug 12889) Adhemerval Zanella via Libc-alpha
2021-08-26 14:23 ` Florian Weimer via Libc-alpha
2021-08-26 17:06 ` Adhemerval Zanella via Libc-alpha
2021-08-30 9:25 ` Florian Weimer via Libc-alpha
2021-08-23 19:50 ` [PATCH v2 10/19] nptl: Use tidlock when accessing TID on pthread_getaffinity_np Adhemerval Zanella via Libc-alpha
2021-08-26 14:24 ` Florian Weimer via Libc-alpha
2021-08-26 17:29 ` Adhemerval Zanella via Libc-alpha
2021-08-30 9:30 ` Florian Weimer via Libc-alpha
2021-08-23 19:50 ` [PATCH v2 11/19] nptl: Use tidlock when accessing TID on pthread_setaffinity Adhemerval Zanella via Libc-alpha
2021-08-26 14:25 ` Florian Weimer via Libc-alpha
2021-08-26 17:31 ` Adhemerval Zanella via Libc-alpha
2021-08-23 19:50 ` [PATCH v2 12/19] nptl: Use tidlock when accessing TID on pthread_getcpuclockid Adhemerval Zanella via Libc-alpha
2021-08-26 14:27 ` Florian Weimer via Libc-alpha
2021-08-26 17:41 ` Adhemerval Zanella via Libc-alpha
2021-08-30 9:34 ` Florian Weimer via Libc-alpha
2021-08-23 19:50 ` [PATCH v2 13/19] nptl: Use tidlock when accessing TID on pthread_getschedparam Adhemerval Zanella via Libc-alpha
2021-08-26 15:00 ` Florian Weimer via Libc-alpha
2021-08-23 19:50 ` [PATCH v2 14/19] nptl: Use tidlock when accessing TID on pthread_setschedparam Adhemerval Zanella via Libc-alpha
2021-08-26 14:35 ` Florian Weimer via Libc-alpha
2021-08-23 19:50 ` [PATCH v2 15/19] nptl: Use tidlock when accessing TID on pthread_getname_np Adhemerval Zanella via Libc-alpha
2021-08-26 14:38 ` Florian Weimer via Libc-alpha
2021-08-26 17:45 ` Adhemerval Zanella via Libc-alpha
2021-08-30 9:37 ` Florian Weimer via Libc-alpha
2021-08-23 19:50 ` [PATCH v2 16/19] nptl: Use tidlock when accessing TID on pthread_setname_np Adhemerval Zanella via Libc-alpha
2021-08-23 19:50 ` [PATCH v2 17/19] nptl: Use tidlock when accessing TID on pthread_sigqueue Adhemerval Zanella via Libc-alpha
2021-08-26 14:43 ` Florian Weimer via Libc-alpha
2021-08-26 17:49 ` Adhemerval Zanella via Libc-alpha
2021-08-30 9:26 ` Florian Weimer via Libc-alpha
2021-08-23 19:50 ` [PATCH v2 18/19] nptl: Use tidlock when accessing TID on pthread_setschedprio Adhemerval Zanella via Libc-alpha
2021-08-23 19:50 ` [PATCH v2 19/19] nptl: Remove INVALID_TD_P Adhemerval Zanella via Libc-alpha
2021-08-26 9:30 ` Florian Weimer via Libc-alpha
2021-08-26 14:47 ` [PATCH v2 00/19] Fix various NPTL synchronization issues Florian Weimer via Libc-alpha
2021-08-26 18:19 ` Adhemerval Zanella via Libc-alpha
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