1// RUN: %clangxx_asan -O0 -mllvm -asan-instrument-dynamic-allocas %s -o %t
2// RUN: not %run %t 2>&1 | FileCheck %s
3//
4
5#include <assert.h>
6#include <stdint.h>
7
8__attribute__((noinline)) void foo(int index, int len) {
9 volatile char str[len] __attribute__((aligned(32)));
10 assert(!(reinterpret_cast<uintptr_t>(str) & 31L));
11 str[index] = '1'; // BOOM
12// CHECK: ERROR: AddressSanitizer: dynamic-stack-buffer-overflow on address [[ADDR:0x[0-9a-f]+]]
13// CHECK: WRITE of size 1 at [[ADDR]] thread T0
14}
15
16int main(int argc, char **argv) {
17 foo(index: 33, len: 10);
18 return 0;
19}
20

source code of compiler-rt/test/asan/TestCases/alloca_overflow_right.cpp