1d3b5ac8bSThurston Dang // RUN: %clangxx_asan -O0 %s -o %t && not %run %t 2>&1 | FileCheck %s 2d3b5ac8bSThurston Dang 3d9377c1dSThurston Dang // Windows does not have execinfo.h. For now, be conservative and 4d9377c1dSThurston Dang // restrict the test to glibc. 5d9377c1dSThurston Dang // REQUIRES: glibc-2.27 6d9377c1dSThurston Dang 7d3b5ac8bSThurston Dang // Test the backtrace() interceptor. 8d3b5ac8bSThurston Dang 9d3b5ac8bSThurston Dang #include <assert.h> 10d3b5ac8bSThurston Dang #include <execinfo.h> 11d3b5ac8bSThurston Dang #include <math.h> 12d3b5ac8bSThurston Dang #include <stdio.h> 13d3b5ac8bSThurston Dang #include <stdlib.h> 14d3b5ac8bSThurston Dang 15d3b5ac8bSThurston Dang #define MAX_BT 100 16d3b5ac8bSThurston Dang main()17d3b5ac8bSThurston Dangint main() { 18d3b5ac8bSThurston Dang void **buffer = (void **)malloc(sizeof(void *) * MAX_BT); 19d3b5ac8bSThurston Dang assert(buffer != NULL); 20d3b5ac8bSThurston Dang free(buffer); 21d3b5ac8bSThurston Dang 22*bd1170d2SThurston Dang // Deliberate use-after-free of 'buffer'. We expect ASan to 23*bd1170d2SThurston Dang // catch this, without triggering internal sanitizer errors. 24d3b5ac8bSThurston Dang int numEntries = backtrace(buffer, MAX_BT); 25d3b5ac8bSThurston Dang printf("backtrace returned %d entries\n", numEntries); 26d3b5ac8bSThurston Dang 27d3b5ac8bSThurston Dang // CHECK: use-after-free 28d3b5ac8bSThurston Dang // CHECK: SUMMARY 29d3b5ac8bSThurston Dang return 0; 30d3b5ac8bSThurston Dang } 31