lib/asan/lit_tests/TestCases/double-free.cc

   1 // RUN: %clangxx_asan -O0 %s -o %t 2>&1
   2 // RUN: not %t 2>&1 | FileCheck %s --check-prefix=CHECK --check-prefix=MALLOC-CTX
   3
   4 // Also works if no malloc context is available.
   5 // RUN: ASAN_OPTIONS=malloc_context_size=0:fast_unwind_on_malloc=0 not %t 2>&1 | FileCheck %s
   6 // RUN: ASAN_OPTIONS=malloc_context_size=0:fast_unwind_on_malloc=1 not %t 2>&1 | FileCheck %s
   7
   8 #include <stdlib.h>
   9 #include <string.h>
  10 int main(int argc, char **argv) {
  11   char *x = (char*)malloc(10 * sizeof(char));
  12   memset(x, 0, 10);
  13   int res = x[argc];
  14   free(x);
  15   free(x + argc - 1);  // BOOM
  16   // CHECK: AddressSanitizer: attempting double-free{{.*}}in thread T0
  17   // CHECK: #0 0x{{.*}} in {{.*}}free
  18   // CHECK: #1 0x{{.*}} in main {{.*}}double-free.cc:[[@LINE-3]]
  19   // CHECK: freed by thread T0 here:
  20   // MALLOC-CTX: #0 0x{{.*}} in {{.*}}free
  21   // MALLOC-CTX: #1 0x{{.*}} in main {{.*}}double-free.cc:[[@LINE-7]]
  22   // CHECK: allocated by thread T0 here:
  23   // MALLOC-CTX: double-free.cc:[[@LINE-12]]
  24   return res;
  25 }