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// Check that if the list of shared libraries changes between the two race
// reports, the second report occurring in a new shared library is still
// symbolized correctly.
// RUN: %clangxx_tsan -O1 %s -DBUILD_SO -fPIC -shared -o %t-so.so
// RUN: %clangxx_tsan -O1 %s -o %t -rdynamic && %deflake %run %t | FileCheck %s
#ifdef BUILD_SO
#include "test.h"
int GLOB_SHARED = 0;
extern "C"
void init_so() {
barrier_init(&barrier, 2);
}
extern "C"
void *write_from_so(void *unused) {
if (unused == 0)
barrier_wait(&barrier);
GLOB_SHARED++;
if (unused != 0)
barrier_wait(&barrier);
return NULL;
}
#else // BUILD_SO
#include "test.h"
#include <dlfcn.h>
#include <string>
int GLOB = 0;
void *write_glob(void *unused) {
if (unused == 0)
barrier_wait(&barrier);
GLOB++;
if (unused != 0)
barrier_wait(&barrier);
return NULL;
}
void race_two_threads(void *(*access_callback)(void *unused)) {
pthread_t t1, t2;
pthread_create(&t1, NULL, access_callback, (void*)1);
pthread_create(&t2, NULL, access_callback, NULL);
pthread_join(t1, NULL);
pthread_join(t2, NULL);
}
int main(int argc, char *argv[]) {
barrier_init(&barrier, 2);
std::string path = std::string(argv[0]) + std::string("-so.so");
race_two_threads(write_glob);
// CHECK: write_glob
void *lib = dlopen(path.c_str(), RTLD_NOW);
if (!lib) {
printf("error in dlopen(): %s\n", dlerror());
return 1;
}
void (*init_so)();
*(void **)&init_so = dlsym(lib, "init_so");
init_so();
void *(*write_from_so)(void *unused);
*(void **)&write_from_so = dlsym(lib, "write_from_so");
race_two_threads(write_from_so);
// CHECK: write_from_so
return 0;
}
#endif // BUILD_SO
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