src/compiler-rt/test/asan/TestCases/double-free.cc

   1 // RUN: %clangxx_asan -O0 %s -o %t 2>&1
   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 // XFAIL: arm-linux-gnueabi
   8 // XFAIL: armv7l-unknown-linux-gnueabihf
   9
  10 #include <stdlib.h>
  11 #include <string.h>
  12 int main(int argc, char **argv) {
  13   char *x = (char*)malloc(10 * sizeof(char));
  14   memset(x, 0, 10);
  15   int res = x[argc];
  16   free(x);
  17   free(x + argc - 1);  // BOOM
  18   // CHECK: AddressSanitizer: attempting double-free{{.*}}in thread T0
  19   // CHECK: #0 0x{{.*}} in {{.*}}free
  20   // CHECK: #1 0x{{.*}} in main {{.*}}double-free.cc:[[@LINE-3]]
  21   // CHECK: freed by thread T0 here:
  22   // MALLOC-CTX: #0 0x{{.*}} in {{.*}}free
  23   // MALLOC-CTX: #1 0x{{.*}} in main {{.*}}double-free.cc:[[@LINE-7]]
  24   // CHECK: allocated by thread T0 here:
  25   // MALLOC-CTX: double-free.cc:[[@LINE-12]]
  26   return res;
  27 }