1 // RUN: %clangxx_asan -O0 -mllvm -asan-instrument-allocas %s -o %t
2 // RUN: not %run %t 2>&1 | FileCheck %s
3 //
4 // REQUIRES: stable-runtime
5 
6 #include <assert.h>
7 #include <stdint.h>
8 
9 void foo(int index, int len) {
10   for (int i = 1; i < len; ++i) {
11     char array[len]; // NOLINT
12     assert(!(reinterpret_cast<uintptr_t>(array) & 31L));
13     array[index + i] = 0;
14 // CHECK: ERROR: AddressSanitizer: dynamic-stack-buffer-overflow on address [[ADDR:0x[0-9a-f]+]]
15 // CHECK: WRITE of size 1 at [[ADDR]] thread T0
16   }
17 }
18 
19 int main(int argc, char **argv) {
20   foo(9, 21);
21   return 0;
22 }
23