58 lines · cpp
1// RUN: %clangxx_tsan -O1 %s -DBUILD_SO -fPIC -shared -o %t-so.so2// RUN: %clangxx_tsan -O1 %s %link_libcxx_tsan -o %t && %run %t 2>&1 | FileCheck %s3 4// dl_iterate_phdr doesn't exist on OS X.5// UNSUPPORTED: darwin6 7#ifdef BUILD_SO8 9#include "test.h"10 11int exported_var = 0;12 13#else // BUILD_SO14 15#include "test.h"16#include <dlfcn.h>17#include <link.h>18#include <string.h>19#include <string>20 21static 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 27void *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 35int 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_SO55 56// CHECK-NOT: WARNING: ThreadSanitizer: data race57// CHECK: DONE58