1*673dc3d4SNico Weber // RUN: %clangxx_asan -O0 -w %s -o %t && not %run %t 2>&1 | FileCheck %s 2*673dc3d4SNico Weber 3*673dc3d4SNico Weber // Checks that concurrent reports will not trigger false "nested bug" reports. 4*673dc3d4SNico Weber // Regression test for https://github.com/google/sanitizers/issues/858 5*673dc3d4SNico Weber 6*673dc3d4SNico Weber #include <pthread.h> 7*673dc3d4SNico Weber #include <stdlib.h> 8*673dc3d4SNico Weber #include <unistd.h> 9*673dc3d4SNico Weber start_routine(void * arg)10*673dc3d4SNico Weberstatic void *start_routine(void *arg) { 11*673dc3d4SNico Weber volatile int *counter = (volatile int *)arg; 12*673dc3d4SNico Weber char buf[8]; 13*673dc3d4SNico Weber __atomic_sub_fetch(counter, 1, __ATOMIC_SEQ_CST); 14*673dc3d4SNico Weber while (*counter) 15*673dc3d4SNico Weber ; 16*673dc3d4SNico Weber buf[0] = buf[9]; 17*673dc3d4SNico Weber return 0; 18*673dc3d4SNico Weber } 19*673dc3d4SNico Weber main(void)20*673dc3d4SNico Weberint main(void) { 21*673dc3d4SNico Weber const int n_threads = 8; 22*673dc3d4SNico Weber int i, counter = n_threads; 23*673dc3d4SNico Weber pthread_t thread[n_threads]; 24*673dc3d4SNico Weber 25*673dc3d4SNico Weber for (i = 0; i < n_threads; ++i) 26*673dc3d4SNico Weber pthread_create(&thread[i], NULL, &start_routine, (void *)&counter); 27*673dc3d4SNico Weber for (i = 0; i < n_threads; ++i) 28*673dc3d4SNico Weber pthread_join(thread[i], NULL); 29*673dc3d4SNico Weber return 0; 30*673dc3d4SNico Weber } 31*673dc3d4SNico Weber 32*673dc3d4SNico Weber // CHECK-NOT: nested bug 33*673dc3d4SNico Weber // CHECK: ERROR: AddressSanitizer: stack-buffer-overflow on address 34*673dc3d4SNico Weber // CHECK: SUMMARY: AddressSanitizer: stack-buffer-overflow 35