1 // Check that if the list of shared libraries changes between the two race
2 // reports, the second report occurring in a new shared library is still
3 // symbolized correctly.
4
5 // RUN: %clangxx_tsan -O1 %s -DBUILD_SO -fPIC -shared -o %t-so.so
6 // RUN: %clangxx_tsan -O1 %s %link_libcxx_tsan -o %t -rdynamic && %deflake %run %t | FileCheck %s
7
8 #ifdef BUILD_SO
9
10 #include "test.h"
11
12 int GLOB_SHARED = 0;
13
14 extern "C"
init_so()15 void init_so() {
16 barrier_init(&barrier, 2);
17 }
18
19 extern "C"
write_from_so(void * unused)20 void *write_from_so(void *unused) {
21 if (unused == 0)
22 barrier_wait(&barrier);
23 GLOB_SHARED++;
24 if (unused != 0)
25 barrier_wait(&barrier);
26 return NULL;
27 }
28
29 #else // BUILD_SO
30
31 #include "test.h"
32 #include <dlfcn.h>
33 #include <string>
34
35 int GLOB = 0;
36
write_glob(void * unused)37 void *write_glob(void *unused) {
38 if (unused == 0)
39 barrier_wait(&barrier);
40 GLOB++;
41 if (unused != 0)
42 barrier_wait(&barrier);
43 return NULL;
44 }
45
race_two_threads(void * (* access_callback)(void * unused))46 void race_two_threads(void *(*access_callback)(void *unused)) {
47 pthread_t t1, t2;
48 pthread_create(&t1, NULL, access_callback, (void*)1);
49 pthread_create(&t2, NULL, access_callback, NULL);
50 pthread_join(t1, NULL);
51 pthread_join(t2, NULL);
52 }
53
main(int argc,char * argv[])54 int main(int argc, char *argv[]) {
55 barrier_init(&barrier, 2);
56 std::string path = std::string(argv[0]) + std::string("-so.so");
57 race_two_threads(write_glob);
58 // CHECK: write_glob
59 void *lib = dlopen(path.c_str(), RTLD_NOW);
60 if (!lib) {
61 printf("error in dlopen(): %s\n", dlerror());
62 return 1;
63 }
64 void (*init_so)();
65 *(void **)&init_so = dlsym(lib, "init_so");
66 init_so();
67 void *(*write_from_so)(void *unused);
68 *(void **)&write_from_so = dlsym(lib, "write_from_so");
69 race_two_threads(write_from_so);
70 // CHECK: write_from_so
71 return 0;
72 }
73
74 #endif // BUILD_SO
75