22 lines · cpp
1// RUN: %clangxx_asan -O0 -mllvm -asan-instrument-dynamic-allocas %s -o %t2// RUN: not %run %t 2>&1 | FileCheck %s3//4// MSVC doesn't support VLAs5// UNSUPPORTED: msvc6 7#include <assert.h>8#include <stdint.h>9 10__attribute__((noinline)) void foo(int index, int len) {11 volatile char str[len] __attribute__((aligned(32)));12 assert(!(reinterpret_cast<uintptr_t>(str) & 31L));13 str[index] = '1'; // BOOM14// CHECK: ERROR: AddressSanitizer: dynamic-stack-buffer-overflow on address [[ADDR:0x[0-9a-f]+]]15// CHECK: WRITE of size 1 at [[ADDR]] thread T016}17 18int main(int argc, char **argv) {19 foo(33, 10);20 return 0;21}22