53 lines
1.5 KiB
C++
53 lines
1.5 KiB
C++
//===-- sanitizer_stoptheworld_testlib.cc ---------------------------------===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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// Dynamic library to test StopTheWorld functionality.
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// When loaded with LD_PRELOAD, it will periodically suspend all threads.
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//===----------------------------------------------------------------------===//
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/* Usage:
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clang++ -fno-exceptions -g -fPIC -I. \
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sanitizer_common/tests/sanitizer_stoptheworld_testlib.cc \
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sanitizer_common/sanitizer_*.cc -shared -lpthread -o teststoptheworld.so
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LD_PRELOAD=`pwd`/teststoptheworld.so /your/app
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*/
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#include "sanitizer_common/sanitizer_platform.h"
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#if SANITIZER_LINUX
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#include <dlfcn.h>
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#include <stddef.h>
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#include <stdio.h>
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#include <pthread.h>
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#include <unistd.h>
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#include "sanitizer_common/sanitizer_stoptheworld.h"
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namespace {
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const uptr kSuspendDuration = 3;
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const uptr kRunDuration = 3;
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void Callback(const SuspendedThreadsList &suspended_threads_list,
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void *argument) {
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sleep(kSuspendDuration);
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}
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void *SuspenderThread(void *argument) {
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while (true) {
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sleep(kRunDuration);
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StopTheWorld(Callback, NULL);
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}
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return NULL;
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}
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__attribute__((constructor)) void StopTheWorldTestLibConstructor(void) {
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pthread_t thread_id;
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pthread_create(&thread_id, NULL, SuspenderThread, NULL);
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}
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} // namespace
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#endif // SANITIZER_LINUX
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