LLVM  6.0.0svn
Valgrind.cpp
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1 //===-- Valgrind.cpp - Implement Valgrind communication ---------*- C++ -*-===//
2 //
3 // The LLVM Compiler Infrastructure
4 //
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
7 //
8 //===----------------------------------------------------------------------===//
9 //
10 // Defines Valgrind communication methods, if HAVE_VALGRIND_VALGRIND_H is
11 // defined. If we have valgrind.h but valgrind isn't running, its macros are
12 // no-ops.
13 //
14 //===----------------------------------------------------------------------===//
15 
16 #include "llvm/Support/Valgrind.h"
17 #include "llvm/Config/config.h"
18 #include <cstddef>
19 
20 #if HAVE_VALGRIND_VALGRIND_H
21 #include <valgrind/valgrind.h>
22 
23 static bool InitNotUnderValgrind() {
24  return !RUNNING_ON_VALGRIND;
25 }
26 
27 // This bool is negated from what we'd expect because code may run before it
28 // gets initialized. If that happens, it will appear to be 0 (false), and we
29 // want that to cause the rest of the code in this file to run the
30 // Valgrind-provided macros.
31 static const bool NotUnderValgrind = InitNotUnderValgrind();
32 
34  if (NotUnderValgrind)
35  return false;
36  return RUNNING_ON_VALGRIND;
37 }
38 
39 void llvm::sys::ValgrindDiscardTranslations(const void *Addr, size_t Len) {
40  if (NotUnderValgrind)
41  return;
42 
43  VALGRIND_DISCARD_TRANSLATIONS(Addr, Len);
44 }
45 
46 #else // !HAVE_VALGRIND_VALGRIND_H
47 
49  return false;
50 }
51 
52 void llvm::sys::ValgrindDiscardTranslations(const void *Addr, size_t Len) {
53 }
54 
55 #endif // !HAVE_VALGRIND_VALGRIND_H
void ValgrindDiscardTranslations(const void *Addr, size_t Len)
Definition: Valgrind.cpp:52
bool RunningOnValgrind()
Definition: Valgrind.cpp:48