mirror of
https://github.com/jart/cosmopolitan.git
synced 2025-01-31 19:43:32 +00:00
3265324e00
This change fixes #496 where ASAN spotted a race condition that could happen in multithreaded programs, with more than OPEN_MAX descriptors when using ZipOS or Windows NT, which require tracking open file info and this change fixes that table so it never relocates, thus allowing us to continue to enjoy the benefits of avoiding locks while reading.
221 lines
7.7 KiB
C
221 lines
7.7 KiB
C
/*-*- mode:c;indent-tabs-mode:nil;c-basic-offset:2;tab-width:8;coding:utf-8 -*-│
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│vi: set net ft=c ts=2 sts=2 sw=2 fenc=utf-8 :vi│
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╞══════════════════════════════════════════════════════════════════════════════╡
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│ Copyright 2022 Justine Alexandra Roberts Tunney │
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│ │
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│ Permission to use, copy, modify, and/or distribute this software for │
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│ any purpose with or without fee is hereby granted, provided that the │
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│ above copyright notice and this permission notice appear in all copies. │
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│ │
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│ THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL │
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│ WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED │
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│ WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE │
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│ AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL │
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│ DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR │
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│ PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER │
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│ TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR │
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│ PERFORMANCE OF THIS SOFTWARE. │
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╚─────────────────────────────────────────────────────────────────────────────*/
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#include "libc/calls/calls.h"
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#include "libc/calls/struct/sched_param.h"
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#include "libc/calls/struct/sigaction.h"
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#include "libc/dce.h"
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#include "libc/errno.h"
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#include "libc/intrin/kprintf.h"
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#include "libc/intrin/pthread.h"
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#include "libc/intrin/pthread2.h"
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#include "libc/macros.internal.h"
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#include "libc/mem/mem.h"
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#include "libc/nexgen32e/nexgen32e.h"
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#include "libc/runtime/runtime.h"
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#include "libc/runtime/stack.h"
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#include "libc/sysv/consts/prot.h"
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#include "libc/sysv/consts/sa.h"
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#include "libc/sysv/consts/sched.h"
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#include "libc/sysv/consts/sig.h"
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#include "libc/testlib/ezbench.h"
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#include "libc/testlib/subprocess.h"
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#include "libc/testlib/testlib.h"
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#include "libc/thread/thread.h"
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void OnUsr1(int sig, struct siginfo *si, void *vctx) {
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struct ucontext *ctx = vctx;
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}
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void SetUp(void) {
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struct sigaction sig = {.sa_sigaction = OnUsr1, .sa_flags = SA_SIGINFO};
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sigaction(SIGUSR1, &sig, 0);
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}
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void TriggerSignal(void) {
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sched_yield();
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/* kprintf("raising at %p\n", __builtin_frame_address(0)); */
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raise(SIGUSR1);
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sched_yield();
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}
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static void *Increment(void *arg) {
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ASSERT_EQ(gettid(), pthread_getthreadid_np());
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TriggerSignal();
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return (void *)((uintptr_t)arg + 1);
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}
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TEST(pthread_create, testCreateReturnJoin) {
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void *rc;
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pthread_t id;
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ASSERT_EQ(0, pthread_create(&id, 0, Increment, (void *)1));
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ASSERT_EQ(0, pthread_join(id, &rc));
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ASSERT_EQ((void *)2, rc);
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}
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static void *IncExit(void *arg) {
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CheckStackIsAligned();
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TriggerSignal();
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pthread_exit((void *)((uintptr_t)arg + 1));
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}
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TEST(pthread_create, testCreateExitJoin) {
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void *rc;
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pthread_t id;
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ASSERT_EQ(0, pthread_create(&id, 0, IncExit, (void *)2));
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ASSERT_EQ(0, pthread_join(id, &rc));
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ASSERT_EQ((void *)3, rc);
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}
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TEST(pthread_detach, testCreateReturn) {
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pthread_t id;
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ASSERT_EQ(0, pthread_create(&id, 0, Increment, 0));
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ASSERT_EQ(0, pthread_detach(id));
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}
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TEST(pthread_detach, testDetachUponCreation) {
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pthread_attr_t attr;
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ASSERT_EQ(0, pthread_attr_init(&attr));
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ASSERT_EQ(0, pthread_attr_setdetachstate(&attr, PTHREAD_CREATE_DETACHED));
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ASSERT_EQ(0, pthread_create(0, &attr, Increment, 0));
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ASSERT_EQ(0, pthread_attr_destroy(&attr));
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}
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static void *CheckSchedule(void *arg) {
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int rc, policy;
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struct sched_param prio;
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ASSERT_EQ(0, pthread_getschedparam(pthread_self(), &policy, &prio));
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ASSERT_EQ(SCHED_OTHER, policy);
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ASSERT_EQ(sched_get_priority_min(SCHED_OTHER), prio.sched_priority);
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if (IsWindows() || IsXnu() || IsOpenbsd()) {
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ASSERT_EQ(ENOSYS, pthread_setschedparam(pthread_self(), policy, &prio));
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} else {
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ASSERT_EQ(0, pthread_setschedparam(pthread_self(), policy, &prio));
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}
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return 0;
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}
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TEST(pthread_detach, scheduling) {
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pthread_t id;
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pthread_attr_t attr;
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struct sched_param pri = {sched_get_priority_min(SCHED_OTHER)};
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ASSERT_EQ(0, pthread_attr_init(&attr));
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ASSERT_EQ(0, pthread_attr_setinheritsched(&attr, PTHREAD_EXPLICIT_SCHED));
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ASSERT_EQ(0, pthread_attr_setschedpolicy(&attr, SCHED_OTHER));
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ASSERT_EQ(0, pthread_attr_setschedparam(&attr, &pri));
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ASSERT_EQ(0, pthread_create(&id, &attr, CheckSchedule, 0));
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ASSERT_EQ(0, pthread_attr_destroy(&attr));
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ASSERT_EQ(0, pthread_join(id, 0));
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}
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static void *CheckStack(void *arg) {
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char buf[1024 * 1024];
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TriggerSignal();
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CheckLargeStackAllocation(buf, 1024 * 1024);
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return 0;
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}
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TEST(pthread_detach, testBigStack) {
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pthread_t id;
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pthread_attr_t attr;
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ASSERT_EQ(0, pthread_attr_init(&attr));
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ASSERT_EQ(0, pthread_attr_setstacksize(&attr, 2 * 1000 * 1000));
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ASSERT_EQ(0, pthread_create(&id, &attr, CheckStack, 0));
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ASSERT_EQ(0, pthread_attr_destroy(&attr));
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ASSERT_EQ(0, pthread_join(id, 0));
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}
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static void *CheckStack2(void *arg) {
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char buf[57244];
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TriggerSignal();
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CheckLargeStackAllocation(buf, sizeof(buf));
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return 0;
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}
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TEST(pthread_detach, testBiggerGuardSize) {
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pthread_t id;
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pthread_attr_t attr;
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ASSERT_EQ(0, pthread_attr_init(&attr));
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ASSERT_EQ(0, pthread_attr_setstacksize(&attr, 65536));
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ASSERT_EQ(0, pthread_attr_setguardsize(&attr, 8192));
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ASSERT_EQ(0, pthread_create(&id, &attr, CheckStack2, 0));
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ASSERT_EQ(0, pthread_attr_destroy(&attr));
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ASSERT_EQ(0, pthread_join(id, 0));
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}
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TEST(pthread_detach, testCustomStack_withReallySmallSize) {
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char *stk;
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size_t siz;
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pthread_t id;
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pthread_attr_t attr;
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siz = PTHREAD_STACK_MIN;
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stk = malloc(siz);
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ASSERT_EQ(0, pthread_attr_init(&attr));
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ASSERT_EQ(0, pthread_attr_setstack(&attr, stk, siz));
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ASSERT_EQ(0, pthread_create(&id, &attr, Increment, 0));
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ASSERT_EQ(0, pthread_attr_destroy(&attr));
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ASSERT_EQ(0, pthread_join(id, 0));
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// we still own the stack memory
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ASSERT_EQ(0, pthread_attr_init(&attr));
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ASSERT_EQ(0, pthread_attr_setstack(&attr, stk, siz));
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ASSERT_EQ(0, pthread_create(&id, &attr, Increment, 0));
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ASSERT_EQ(0, pthread_attr_destroy(&attr));
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ASSERT_EQ(0, pthread_join(id, 0));
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free(stk);
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}
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TEST(pthread_exit, mainThreadWorks) {
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// _Exit1() can't set process exit code on XNU/NetBSD/OpenBSD.
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if (IsLinux() || IsFreebsd() || IsWindows()) {
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SPAWN(fork);
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pthread_exit((void *)2);
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EXITS(2);
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} else {
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SPAWN(fork);
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pthread_exit((void *)0);
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EXITS(0);
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}
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}
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static void CreateJoin(void) {
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pthread_t id;
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ASSERT_EQ(0, pthread_create(&id, 0, Increment, 0));
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ASSERT_EQ(0, pthread_join(id, 0));
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}
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// this is de facto the same as create+join
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static void CreateDetach(void) {
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pthread_t id;
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ASSERT_EQ(0, pthread_create(&id, 0, Increment, 0));
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ASSERT_EQ(0, pthread_detach(id));
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}
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// this is really fast
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static void CreateDetached(void) {
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pthread_attr_t attr;
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ASSERT_EQ(0, pthread_attr_init(&attr));
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ASSERT_EQ(0, pthread_attr_setdetachstate(&attr, PTHREAD_CREATE_DETACHED));
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ASSERT_EQ(0, pthread_create(0, &attr, Increment, 0));
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ASSERT_EQ(0, pthread_attr_destroy(&attr));
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}
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BENCH(pthread_create, bench) {
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EZBENCH2("CreateJoin", donothing, CreateJoin());
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EZBENCH2("CreateDetach", donothing, CreateDetach());
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EZBENCH2("CreateDetached", donothing, CreateDetached());
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}
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