41 lines · cpp
1// RUN: %clangxx_asan -O0 %s -o %t && not %run %t 2>&1 | FileCheck %s2 3// Windows does not have execinfo.h. For now, be conservative and4// restrict the test to glibc.5// REQUIRES: glibc-2.276 7// Test the backtrace_symbols() interceptor.8 9#include <assert.h>10#include <execinfo.h>11#include <math.h>12#include <stdio.h>13#include <stdlib.h>14 15#define MAX_BT 10016 17int main() {18 void **buffer = (void **)malloc(sizeof(void *) * MAX_BT);19 assert(buffer != NULL);20 21 int numEntries = backtrace(buffer, MAX_BT);22 printf("backtrace returned %d entries\n", numEntries);23 24 free(buffer);25 26 // Deliberate use-after-free of 'buffer'. We expect ASan to27 // catch this, without triggering internal sanitizer errors.28 char **strings = backtrace_symbols(buffer, numEntries);29 assert(strings != NULL);30 31 for (int i = 0; i < numEntries; i++) {32 printf("%s\n", strings[i]);33 }34 35 free(strings);36 37 // CHECK: use-after-free38 // CHECK: SUMMARY39 return 0;40}41