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

   1 // RUN: %clangxx_asan %s -o %t && not %run %t 2>&1 | FileCheck %s
   2 // RUN: %clangxx_asan -O %s -o %t && not %run %t 2>&1 | FileCheck %s
   3 // Check that we can find huge buffer overflows before.
   4 #include <stdlib.h>
   5 #include <string.h>
   6 int main(int argc, char **argv) {
   7   char *x = (char*)malloc(1 << 20);
   8   memset(x, 0, 10);
   9   int res = x[-argc * 4000];  // BOOOM
  10   // CHECK: is located 4000 bytes before
  11   free(x);
  12   return res;
  13 }