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