compiler-rt/test/asan/TestCases/invalid-free.cpp

   1 // RUN: %clangxx_asan -O0 %s -o %t
   2 // RUN: not %run %t 2>&1 | FileCheck %s --check-prefix=CHECK --check-prefix=MALLOC-CTX
   3
   4 // Also works if no malloc context is available.
   5 // RUN: %env_asan_opts=malloc_context_size=0:fast_unwind_on_malloc=0 not %run %t 2>&1 | FileCheck %s
   6 // RUN: %env_asan_opts=malloc_context_size=0:fast_unwind_on_malloc=1 not %run %t 2>&1 | FileCheck %s
   7 // REQUIRES: stable-runtime
   8
   9 #include <stdlib.h>
  10 #include <string.h>
  11 int main(int argc, char **argv) {
  12   char *x = (char*)malloc(10 * sizeof(char));
  13   memset(x, 0, 10);
  14   int res = x[argc];
  15   free(x + 5);  // BOOM
  16   // CHECK: AddressSanitizer: attempting free on address{{.*}}in thread T0
  17   // CHECK: invalid-free.cpp:[[@LINE-2]]
  18   // CHECK: is located 5 bytes inside of 10-byte region
  19   // CHECK: allocated by thread T0 here:
  20   // MALLOC-CTX: invalid-free.cpp:[[@LINE-8]]
  21   return res;
  22 }