src/libcompiler_builtins/compiler-rt/test/asan/TestCases/Posix/invalid-pointer-pairs-threads.cc

   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=1 %run %t a 2>&1 | FileCheck %s -check-prefix=OK -allow-empty
   4 // RUN: %env_asan_opts=detect_invalid_pointer_pairs=1 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
  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
  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.cc:[[@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 }