src/libcompiler_builtins/compiler-rt/test/asan/TestCases/alloca_overflow_right.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 __attribute__((noinline)) void foo(int index, int len) {
   8   volatile char str[len] __attribute__((aligned(32)));
   9   assert(!(reinterpret_cast<long>(str) & 31L));
  10   str[index] = '1'; // BOOM
  11 // CHECK: ERROR: AddressSanitizer: dynamic-stack-buffer-overflow on address [[ADDR:0x[0-9a-f]+]]
  12 // CHECK: WRITE of size 1 at [[ADDR]] thread T0
  13 }
  14
  15 int main(int argc, char **argv) {
  16   foo(33, 10);
  17   return 0;
  18 }