src/libcompiler_builtins/compiler-rt/test/asan/TestCases/alloca_detect_custom_size_.cc

   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
  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
  20 int main(int argc, char **argv) {
  21   foo(10, 10);
  22   return 0;
  23 }