| // RUN: %clangxx_tsan -O1 %s -DBUILD_SO -fPIC -shared -o %t-so.so |
| // RUN: %clangxx_tsan -O1 %s -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 <dlfcn.h> |
| #include <link.h> |
| #include <string.h> |
| #include <string> |
| |
| 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 |