1 // RUN: %clangxx_tsan -O1 %s -o %t && %run %t 66 2>&1 | FileCheck %s -check-prefix=CHECK-DIE
2 // RUN: %clangxx_tsan -O1 %s -o %t && %env_tsan_opts=die_after_fork=0 %run %t 2>&1 | FileCheck %s -check-prefix=CHECK-NODIE
3 #include "test.h"
4 #include <errno.h>
5 #include <sys/types.h>
6 #include <sys/wait.h>
7
sleeper(void * p)8 static void *sleeper(void *p) {
9 barrier_wait(&barrier);
10 return 0;
11 }
12
nop(void * p)13 static void *nop(void *p) {
14 return 0;
15 }
16
main(int argc,const char ** argv)17 int main(int argc, const char **argv) {
18 barrier_init(&barrier, 3);
19 const int kSleeperThreads = 2;
20 barrier_init(&barrier, kSleeperThreads + 1);
21 pthread_t th0[kSleeperThreads];
22 for (int i = 0; i < kSleeperThreads; i++)
23 pthread_create(&th0[i], 0, sleeper, 0);
24 const int kNopThreads = 5;
25 pthread_t th1[kNopThreads];
26 for (int i = 0; i < kNopThreads; i++)
27 pthread_create(&th1[i], 0, nop, 0);
28 for (int i = 0; i < kNopThreads; i++)
29 pthread_join(th1[i], 0);
30 int pid = fork();
31 if (pid < 0) {
32 fprintf(stderr, "failed to fork (%d)\n", errno);
33 exit(1);
34 }
35 if (pid == 0) {
36 // child
37 const int kChildThreads = 4;
38 pthread_t th2[kChildThreads];
39 for (int i = 0; i < kChildThreads; i++)
40 pthread_create(&th2[i], 0, nop, 0);
41 for (int i = 0; i < kChildThreads; i++)
42 pthread_join(th2[i], 0);
43 exit(0);
44 return 0;
45 }
46 // parent
47 int expect = argc > 1 ? atoi(argv[1]) : 0;
48 int status = 0;
49 while (waitpid(pid, &status, 0) != pid) {
50 }
51 if (!WIFEXITED(status) || WEXITSTATUS(status) != expect) {
52 fprintf(stderr, "subprocess exited with %d, expected %d\n", status, expect);
53 exit(1);
54 }
55 barrier_wait(&barrier);
56 for (int i = 0; i < kSleeperThreads; i++)
57 pthread_join(th0[i], 0);
58 fprintf(stderr, "OK\n");
59 return 0;
60 }
61
62 // CHECK-DIE: ThreadSanitizer: starting new threads after multi-threaded fork is not supported
63
64 // CHECK-NODIE-NOT: ThreadSanitizer:
65 // CHECK-NODIE: OK
66 // CHECK-NODIE-NOT: ThreadSanitizer:
67