compiler-rt/test/msan/dtor-member.cpp

   1 // RUN: %clangxx_msan %s -fsanitize=memory -fsanitize-memory-use-after-dtor -o %t && %run %t >%t.out 2>&1
   2 // RUN: FileCheck %s < %t.out
   3
   4 // RUN: %clangxx_msan %s -O1 -fsanitize=memory -fsanitize-memory-use-after-dtor -o %t && %run %t >%t.out 2>&1
   5 // RUN: FileCheck %s < %t.out
   6
   7 // RUN: %clangxx_msan %s -O2 -fsanitize=memory -fsanitize-memory-use-after-dtor -o %t &&  %run %t >%t.out 2>&1
   8 // RUN: FileCheck %s < %t.out
   9
  10 // RUN: %clangxx_msan %s -fsanitize=memory -fno-sanitize-memory-use-after-dtor -o %t &&  %run %t >%t.out 2>&1
  11 // RUN: FileCheck %s --check-prefix=CHECK-NO-FLAG < %t.out
  12
  13 // RUN: %clangxx_msan -fsanitize=memory -fsanitize-memory-use-after-dtor %s -o %t && MSAN_OPTIONS=poison_in_dtor=0 %run %t >%t.out 2>&1
  14 // RUN: FileCheck %s --check-prefix=CHECK-NO-FLAG < %t.out
  15
  16 #include <sanitizer/msan_interface.h>
  17 #include <assert.h>
  18 #include <stdio.h>
  19 #include <new>
  20
  21 struct Simple {
  22   int x_;
  23   Simple() {
  24     x_ = 5;
  25   }
  26   ~Simple() { }
  27 };
  28
  29 int main() {
  30   unsigned long buf[1];
  31   assert(sizeof(Simple) <= sizeof(buf));
  32
  33   // The placement new operator forces the object to be constructed in the
  34   // memory location &buf. Since objects made in this way must be explicitly
  35   // destroyed, there are no implicit calls inserted that would interfere with
  36   // test behavior.
  37   Simple *s = new(&buf) Simple();
  38   s->~Simple();
  39
  40   if (__msan_test_shadow(s, sizeof(*s)) != -1)
  41     printf("s is poisoned\n");
  42   else
  43     printf("s is not poisoned\n");
  44   // CHECK: s is poisoned
  45   // CHECK-NO-FLAG: s is not poisoned
  46
  47   return 0;
  48 }