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

   1 // RUN: %clangxx_msan %s -fsanitize=memory -fsanitize-memory-use-after-dtor -o %t && MSAN_OPTIONS=poison_in_dtor=1 not %run %t >%t.out 2>&1
   2 // RUN: FileCheck %s --check-prefix=CHECK-UAD < %t.out
   3
   4 // RUN: %clangxx_msan %s -O1 -fsanitize=memory -fsanitize-memory-use-after-dtor -o %t && MSAN_OPTIONS=poison_in_dtor=1 not %run %t >%t.out 2>&1
   5 // RUN: FileCheck %s --check-prefix=CHECK-UAD < %t.out
   6
   7 // RUN: %clangxx_msan %s -O2 -fsanitize=memory -fsanitize-memory-use-after-dtor -o %t && MSAN_OPTIONS=poison_in_dtor=1 not %run %t >%t.out 2>&1
   8 // RUN: FileCheck %s --check-prefix=CHECK-UAD < %t.out
   9
  10 // RUN: %clangxx_msan %s -O1 -fsanitize=memory -fsanitize-memory-use-after-dtor -fsanitize-memory-track-origins -o %t && MSAN_OPTIONS=poison_in_dtor=1 not %run %t >%t.out 2>&1
  11 // RUN: FileCheck %s --check-prefixes=CHECK-UAD,CHECK-ORIGINS < %t.out
  12
  13 // RUN: %clangxx_msan %s -fno-sanitize-memory-use-after-dtor -o %t && MSAN_OPTIONS=poison_in_dtor=1 not %run %t > %t.out 2>&1
  14 // RUN: FileCheck %s --check-prefix=CHECK-UAD-OFF < %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     x_ += 1;
  28   }
  29 };
  30
  31 int main() {
  32   unsigned long buf[1];
  33   assert(sizeof(Simple) <= sizeof(buf));
  34
  35   Simple *s = new(&buf) Simple();
  36   s->~Simple();
  37
  38   fprintf(stderr, "\n");  // Need output to parse for CHECK-UAD-OFF case
  39   return s->x_;
  40
  41   // CHECK-UAD: WARNING: MemorySanitizer: use-of-uninitialized-value
  42   // CHECK-UAD: {{#0 0x.* in main.*use-after-dtor.cpp:}}[[@LINE-3]]
  43
  44   // CHECK-ORIGINS: Memory was marked as uninitialized
  45   // CHECK-ORIGINS: {{#0 0x.* in __sanitizer_dtor_callback}}
  46   // CHECK-ORIGINS: {{#1 0x.* in Simple::~Simple}}
  47
  48   // CHECK-UAD: SUMMARY: MemorySanitizer: use-of-uninitialized-value {{.*main}}
  49   // CHECK-UAD-OFF-NOT: SUMMARY: MemorySanitizer: use-of-uninitialized-value
  50 }