1 //===-- sanitizer_stoptheworld_testlib.cc ---------------------------------===// 2 // 3 // The LLVM Compiler Infrastructure 4 // 5 // This file is distributed under the University of Illinois Open Source 6 // License. See LICENSE.TXT for details. 7 // 8 //===----------------------------------------------------------------------===// 9 // Dynamic library to test StopTheWorld functionality. 10 // When loaded with LD_PRELOAD, it will periodically suspend all threads. 11 //===----------------------------------------------------------------------===// 12 /* Usage: 13 clang++ -fno-exceptions -g -fPIC -I. \ 14 sanitizer_common/tests/sanitizer_stoptheworld_testlib.cc \ 15 sanitizer_common/sanitizer_*.cc -shared -lpthread -o teststoptheworld.so 16 LD_PRELOAD=`pwd`/teststoptheworld.so /your/app 17 */ 18 19 #include "sanitizer_common/sanitizer_platform.h" 20 #if SANITIZER_LINUX 21 22 #include <dlfcn.h> 23 #include <stddef.h> 24 #include <stdio.h> 25 #include <pthread.h> 26 #include <unistd.h> 27 28 #include "sanitizer_common/sanitizer_stoptheworld.h" 29 30 namespace { 31 const uptr kSuspendDuration = 3; 32 const uptr kRunDuration = 3; 33 34 void Callback(const SuspendedThreadsList &suspended_threads_list, 35 void *argument) { 36 sleep(kSuspendDuration); 37 } 38 39 void *SuspenderThread(void *argument) { 40 while (true) { 41 sleep(kRunDuration); 42 StopTheWorld(Callback, NULL); 43 } 44 return NULL; 45 } 46 47 __attribute__((constructor)) void StopTheWorldTestLibConstructor(void) { 48 pthread_t thread_id; 49 pthread_create(&thread_id, NULL, SuspenderThread, NULL); 50 } 51 } // namespace 52 53 #endif // SANITIZER_LINUX 54
