1 // RUN: %clangxx_asan -O0 %s -pthread -o %t -mllvm -asan-detect-invalid-pointer-pair
2
3 // RUN: %env_asan_opts=detect_invalid_pointer_pairs=2 %run %t a 2>&1 | FileCheck %s -check-prefix=OK -allow-empty
4 // RUN: %env_asan_opts=detect_invalid_pointer_pairs=2 not %run %t b 2>&1 | FileCheck %s -check-prefix=B
5
6 // pthread barriers are not available on OS X
7 // UNSUPPORTED: darwin
8
9 #include <assert.h>
10 #include <pthread.h>
11 #include <stdlib.h>
12 #include <unistd.h>
13
14 char *pointers[2];
15 pthread_barrier_t bar;
16
thread_main(void * n)17 void *thread_main(void *n) {
18 char local;
19
20 unsigned long id = (unsigned long)n;
21 pointers[id] = &local;
22 pthread_barrier_wait(&bar);
23 pthread_barrier_wait(&bar);
24
25 return NULL;
26 }
27
main(int argc,char ** argv)28 int main(int argc, char **argv) {
29 assert(argc >= 2);
30
31 char t = argv[1][0];
32
33 pthread_t threads[2];
34 pthread_barrier_init(&bar, NULL, 3);
35 pthread_create(&threads[0], 0, thread_main, (void *)0);
36 pthread_create(&threads[1], 0, thread_main, (void *)1);
37 pthread_barrier_wait(&bar);
38
39 if (t == 'a') {
40 // OK-NOT: not handled yet
41 unsigned r = pointers[0] - pointers[1];
42 } else {
43 char local;
44 char *parent_pointer = &local;
45
46 // B: ERROR: AddressSanitizer: invalid-pointer-pair
47 // B: #{{[0-9]+ .*}} in main {{.*}}invalid-pointer-pairs-threads.cpp:[[@LINE+1]]
48 unsigned r = parent_pointer - pointers[0];
49 }
50
51 pthread_barrier_wait(&bar);
52 pthread_join(threads[0], 0);
53 pthread_join(threads[1], 0);
54 pthread_barrier_destroy(&bar);
55
56 return 0;
57 }
58