compiler-rt/test/asan/TestCases/alloca_instruments_all_paddings.cpp

   1 // RUN: %clangxx_asan -O0 -mllvm -asan-instrument-dynamic-allocas %s -o %t
   2 // RUN: %clangxx_asan -O3 -mllvm -asan-instrument-dynamic-allocas %s -o %t
   3 // RUN: %run %t 2>&1
   4 //
   5
   6 #include "sanitizer/asan_interface.h"
   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   char *q = (char *)__asan_region_is_poisoned((char *)str, 64);
  14   assert(q && ((q - str) == index));
  15 }
  16
  17 int main(int argc, char **argv) {
  18   for (int i = 1; i < 33; ++i)
  19     foo(i, i);
  20
  21   for (int i = 1; i < 33; ++i)
  22     foo(i, i);
  23
  24   return 0;
  25 }