| 1 | // RUN: %clangxx_asan -O0 -mllvm -asan-instrument-dynamic-allocas %s -o %t |
|---|---|
| 2 | // RUN: not %run %t 2>&1 | FileCheck %s |
| 3 | // |
| 4 | // MSVC doesn't support VLAs |
| 5 | // UNSUPPORTED: msvc |
| 6 | |
| 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'; // BOOM |
| 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 | int main(int argc, char **argv) { |
| 19 | foo(index: 33, len: 10); |
| 20 | return 0; |
| 21 | } |
| 22 |