compiler-rt/test/msan/use-after-dtor.cpp

   1 // RUN: %clangxx_msan %s -fsanitize=memory -fsanitize-memory-use-after-dtor -o %t && not %run %t 2>&1 | FileCheck %s --check-prefix=CHECK-UAD
   2 // RUN: %clangxx_msan %s -O1 -fsanitize=memory -fsanitize-memory-use-after-dtor -o %t && not %t 2>&1 | FileCheck %s --check-prefix=CHECK-UAD
   3 // RUN: %clangxx_msan %s -O2 -fsanitize=memory -fsanitize-memory-use-after-dtor -o %t && not %run %t 2>&1 | FileCheck %s --check-prefix=CHECK-UAD
   4 // RUN: %clangxx_msan %s -O1 -fsanitize=memory -fsanitize-memory-use-after-dtor -fsanitize-memory-track-origins -o %t && not %run %t 2>&1 | FileCheck %s --check-prefixes=CHECK-UAD,CHECK-ORIGINS
   5 // RUN: %clangxx_msan %s -fno-sanitize-memory-use-after-dtor -o %t && not %run %t 2>&1 | FileCheck %s --check-prefix=CHECK-UAD-OFF
   6
   7 #include <sanitizer/msan_interface.h>
   8 #include <assert.h>
   9 #include <stdio.h>
  10 #include <new>
  11
  12 struct Simple {
  13   int x_;
  14   Simple() {
  15     x_ = 5;
  16   }
  17   ~Simple() {
  18     x_ += 1;
  19   }
  20 };
  21
  22 int main() {
  23   unsigned long buf[1];
  24   assert(sizeof(Simple) <= sizeof(buf));
  25
  26   Simple *s = new(&buf) Simple();
  27   s->~Simple();
  28
  29   fprintf(stderr, "\n");  // Need output to parse for CHECK-UAD-OFF case
  30   return s->x_;
  31
  32   // CHECK-UAD: WARNING: MemorySanitizer: use-of-uninitialized-value
  33   // CHECK-UAD: {{#0 0x.* in main.*use-after-dtor.cpp:}}[[@LINE-3]]
  34
  35   // CHECK-ORIGINS: Member fields were destroyed
  36   // CHECK-ORIGINS: {{#0 0x.* in __sanitizer_dtor_callback}}
  37   // CHECK-ORIGINS: {{#1 0x.* in .*~Simple.*cpp:}}[[@LINE-24]]:
  38   // CHECK-ORIGINS: {{#2 0x.* in .*~Simple.*cpp:}}[[@LINE-19]]:
  39
  40   // CHECK-UAD: SUMMARY: MemorySanitizer: use-of-uninitialized-value {{.*main}}
  41   // CHECK-UAD-OFF-NOT: SUMMARY: MemorySanitizer: use-of-uninitialized-value
  42 }