// RUN: %clangxx_tsan -O1 %s -DBUILD_SO -fPIC -shared -o %t-so.so // RUN: %clangxx_tsan -O1 %s %link_libcxx_tsan -o %t && %run %t 2>&1 | FileCheck %s // dl_iterate_phdr doesn't exist on OS X. // UNSUPPORTED: darwin #ifdef BUILD_SO #include "test.h" int exported_var = 0; #else // BUILD_SO #include "test.h" #include #include #include #include static int callback(struct dl_phdr_info *info, size_t size, void *data) { if (info->dlpi_name[0] == '\0') info->dlpi_name = "/proc/self/exe"; return !strcmp(info->dlpi_name, "non existent module"); } void *thread(void *unused) { for (int i = 0; i < 1000; i++) { barrier_wait(&barrier); dl_iterate_phdr(callback, 0); } return 0; } int main(int argc, char *argv[]) { barrier_init(&barrier, 2); std::string path = std::string(argv[0]) + std::string("-so.so"); pthread_t th; pthread_create(&th, 0, thread, 0); for (int i = 0; i < 1000; i++) { barrier_wait(&barrier); void *lib = dlopen(path.c_str(), RTLD_NOW); if (!lib) { printf("error in dlopen: %s\n", dlerror()); return 1; } dlclose(lib); } pthread_join(th, 0); fprintf(stderr, "DONE\n"); return 0; } #endif // BUILD_SO // CHECK-NOT: WARNING: ThreadSanitizer: data race // CHECK: DONE