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Make detached threads work better

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This change adds a double linked list of threads, so that pthread_exit()
will know when it should call exit() from an orphaned child. This change
also improves ftrace and strace logging.
This commit is contained in:
Justine Tunney 2022-11-09 03:58:57 -08:00
parent b74d8c1acd
commit cee6871710
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GPG key ID: BE714B4575D6E328
37 changed files with 638 additions and 314 deletions
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66
test/libc/thread/pthread_exit_test.c Normal file
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/*-*- mode:c;indent-tabs-mode:nil;c-basic-offset:2;tab-width:8;coding:utf-8 -*-│
│vi: set net ft=c ts=2 sts=2 sw=2 fenc=utf-8 :vi│
╞══════════════════════════════════════════════════════════════════════════════╡
│ Copyright 2022 Justine Alexandra Roberts Tunney │
│ │
│ Permission to use, copy, modify, and/or distribute this software for │
│ any purpose with or without fee is hereby granted, provided that the │
│ above copyright notice and this permission notice appear in all copies. │
│ │
│ THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL │
│ WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED │
│ WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE │
│ AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL │
│ DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR │
│ PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER │
│ TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR │
│ PERFORMANCE OF THIS SOFTWARE. │
╚─────────────────────────────────────────────────────────────────────────────*/
#include "libc/runtime/runtime.h"
#include "libc/testlib/subprocess.h"
#include "libc/testlib/testlib.h"
#include "libc/thread/thread.h"
#define MAIN 150
#define CHILD 170
pthread_t main_thread;
_Thread_local static int exit_code;
void OnExit(void) {
_Exit(exit_code);
}
void *Worker(void *arg) {
ASSERT_EQ(0, pthread_join(main_thread, 0));
exit_code = CHILD;
pthread_exit(0);
}
TEST(pthread_exit, joinableOrphanedChild_runsAtexitHandlers) {
pthread_attr_t attr;
SPAWN(fork);
atexit(OnExit);
exit_code = MAIN;
main_thread = pthread_self();
ASSERT_EQ(0, pthread_attr_init(&attr));
ASSERT_EQ(0, pthread_attr_setdetachstate(&attr, PTHREAD_CREATE_JOINABLE));
ASSERT_EQ(0, pthread_create(0, &attr, Worker, 0));
ASSERT_EQ(0, pthread_attr_destroy(&attr));
pthread_exit(0);
EXITS(CHILD);
}
TEST(pthread_exit, detachedOrphanedChild_runsAtexitHandlers) {
pthread_attr_t attr;
SPAWN(fork);
atexit(OnExit);
exit_code = MAIN;
main_thread = pthread_self();
ASSERT_EQ(0, pthread_attr_init(&attr));
ASSERT_EQ(0, pthread_attr_setdetachstate(&attr, PTHREAD_CREATE_DETACHED));
ASSERT_EQ(0, pthread_create(0, &attr, Worker, 0));
ASSERT_EQ(0, pthread_attr_destroy(&attr));
pthread_exit(0);
EXITS(CHILD);
}