1 // RUN: %clangxx_tsan -O1 %s -DBUILD_SO -fPIC -shared -o %t-so.so 2 // RUN: %clangxx_tsan -O1 %s -o %t && %run %t 2>&1 | FileCheck %s 3 4 // dl_iterate_phdr doesn't exist on OS X. 5 // UNSUPPORTED: darwin 6 7 #ifdef BUILD_SO 8 9 #include "test.h" 10 11 int exported_var = 0; 12 13 #else // BUILD_SO 14 15 #include "test.h" 16 #include <dlfcn.h> 17 #include <link.h> 18 #include <string.h> 19 #include <string> 20 21 static int callback(struct dl_phdr_info *info, size_t size, void *data) { 22 if (info->dlpi_name[0] == '\0') 23 info->dlpi_name = "/proc/self/exe"; 24 return !strcmp(info->dlpi_name, "non existent module"); 25 } 26 27 void *thread(void *unused) { 28 for (int i = 0; i < 1000; i++) { 29 barrier_wait(&barrier); 30 dl_iterate_phdr(callback, 0); 31 } 32 return 0; 33 } 34 35 int main(int argc, char *argv[]) { 36 barrier_init(&barrier, 2); 37 std::string path = std::string(argv[0]) + std::string("-so.so"); 38 pthread_t th; 39 pthread_create(&th, 0, thread, 0); 40 for (int i = 0; i < 1000; i++) { 41 barrier_wait(&barrier); 42 void *lib = dlopen(path.c_str(), RTLD_NOW); 43 if (!lib) { 44 printf("error in dlopen: %s\n", dlerror()); 45 return 1; 46 } 47 dlclose(lib); 48 } 49 pthread_join(th, 0); 50 fprintf(stderr, "DONE\n"); 51 return 0; 52 } 53 54 #endif // BUILD_SO 55 56 // CHECK-NOT: WARNING: ThreadSanitizer: data race 57 // CHECK: DONE 58
