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 
7 struct A {
8   char a[3];
9   int b[3];
10 };
11 
foo(int index,int len)12 __attribute__((noinline)) void foo(int index, int len) {
13   volatile struct A str[len] __attribute__((aligned(32)));
14   assert(!(reinterpret_cast<long>(str) & 31L));
15   str[index].a[0] = '1'; // BOOM
16 // CHECK: ERROR: AddressSanitizer: dynamic-stack-buffer-overflow on address [[ADDR:0x[0-9a-f]+]]
17 // CHECK: WRITE of size 1 at [[ADDR]] thread T0
18 }
19 
main(int argc,char ** argv)20 int main(int argc, char **argv) {
21   foo(10, 10);
22   return 0;
23 }
24