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 -o %t && %deflake %run %t | FileCheck %s
7
8 #ifdef BUILD_SO
9
10 #include <stddef.h>
11 #include <unistd.h>
12
13 int GLOB_SHARED = 0;
14
15 extern "C"
write_from_so(void * unused)16 void *write_from_so(void *unused) {
17 if (unused)
18 sleep(1);
19 GLOB_SHARED++;
20 return NULL;
21 }
22
23 #else // BUILD_SO
24
25 #include <dlfcn.h>
26 #include <pthread.h>
27 #include <stdio.h>
28 #include <stddef.h>
29 #include <unistd.h>
30
31 #include <string>
32
33 int GLOB = 0;
34
write_glob(void * unused)35 void *write_glob(void *unused) {
36 if (unused)
37 sleep(1);
38 GLOB++;
39 return NULL;
40 }
41
race_two_threads(void * (* access_callback)(void * unused))42 void race_two_threads(void *(*access_callback)(void *unused)) {
43 pthread_t t1, t2;
44 pthread_create(&t1, NULL, access_callback, (void*)1);
45 pthread_create(&t2, NULL, access_callback, NULL);
46 pthread_join(t1, NULL);
47 pthread_join(t2, NULL);
48 }
49
main(int argc,char * argv[])50 int main(int argc, char *argv[]) {
51 std::string path = std::string(argv[0]) + std::string("-so.so");
52 race_two_threads(write_glob);
53 // CHECK: write_glob
54 void *lib = dlopen(path.c_str(), RTLD_NOW);
55 if (!lib) {
56 printf("error in dlopen(): %s\n", dlerror());
57 return 1;
58 }
59 void *(*write_from_so)(void *unused);
60 *(void **)&write_from_so = dlsym(lib, "write_from_so");
61 race_two_threads(write_from_so);
62 // CHECK: write_from_so
63 return 0;
64 }
65
66 #endif // BUILD_SO
67