compiler-rt/test/asan/TestCases/use-after-free-right.cpp

   1 // RUN: %clangxx_asan -O0 %s -o %t && not %run %t 2>&1 | FileCheck %s
   2 // RUN: %clangxx_asan -O1 %s -o %t && not %run %t 2>&1 | FileCheck %s
   3 // RUN: %clangxx_asan -O2 %s -o %t && not %run %t 2>&1 | FileCheck %s
   4 // RUN: %clangxx_asan -O3 %s -o %t && not %run %t 2>&1 | FileCheck %s
   5 // REQUIRES: stable-runtime
   6
   7 // Test use-after-free report in the case when access is at the right border of
   8 // the allocation.
   9
  10 #include <stdlib.h>
  11 int main() {
  12   volatile char *x = (char*)malloc(sizeof(char));
  13   free((void*)x);
  14   *x = 42;
  15   // CHECK: {{.*ERROR: AddressSanitizer: heap-use-after-free on address}}
  16   // CHECK:   {{0x.* at pc 0x.* bp 0x.* sp 0x.*}}
  17   // CHECK: {{WRITE of size 1 at 0x.* thread T0}}
  18   // CHECK: {{    #0 0x.* in main .*use-after-free-right.cpp:}}[[@LINE-4]]
  19   // CHECK: {{0x.* is located 0 bytes inside of 1-byte region .0x.*,0x.*}}
  20   // CHECK: {{freed by thread T0 here:}}
  21   // CHECK: {{    #0 0x.* in .*free}}
  22   // CHECK: {{    #[1-3] 0x.* in main .*use-after-free-right.cpp:}}[[@LINE-9]]
  23
  24   // CHECK: {{previously allocated by thread T0 here:}}
  25   // CHECK: {{    #0 0x.* in .*malloc}}
  26   // CHECK: {{    #[1-3] 0x.* in main .*use-after-free-right.cpp:}}[[@LINE-14]]
  27 }