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//===-- sanitizer_stoptheworld_testlib.cc ---------------------------------===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
// 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.cc \
sanitizer_common/sanitizer_*.cc -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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