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| // 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 <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
|