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

   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
   8 // RUN: %clangxx_asan -O0 -fsanitize-recover=address %s -o %t 2>&1
   9 // RUN: %env_asan_opts=halt_on_error=false %run %t 2>&1 | FileCheck %s --check-prefix CHECK-RECOVER
  10 // REQUIRES: stable-runtime
  11
  12 #include <stdlib.h>
  13 #include <string.h>
  14 int main(int argc, char **argv) {
  15   char *x = (char*)malloc(10 * sizeof(char));
  16   memset(x, 0, 10);
  17   int res = x[argc];
  18   free(x);
  19   free(x + argc - 1);  // BOOM
  20   // CHECK: AddressSanitizer: attempting double-free{{.*}}in thread T0
  21   // CHECK: #0 0x{{.*}} in {{.*}}free
  22   // CHECK: #1 0x{{.*}} in main {{.*}}double-free.cpp:[[@LINE-3]]
  23   // CHECK: freed by thread T0 here:
  24   // MALLOC-CTX: #0 0x{{.*}} in {{.*}}free
  25   // MALLOC-CTX: #1 0x{{.*}} in main {{.*}}double-free.cpp:[[@LINE-7]]
  26   // CHECK: allocated by thread T0 here:
  27   // MALLOC-CTX: double-free.cpp:[[@LINE-12]]
  28   // CHECK-RECOVER: AddressSanitizer: attempting double-free{{.*}}in thread T0
  29   // CHECK-RECOVER-NOT: AddressSanitizer CHECK failed:
  30   return res;
  31 }