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
23static 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.
31static const bool NotUnderValgrind = InitNotUnderValgrind();
32
33bool llvm::sys::RunningOnValgrind() {
34  if (NotUnderValgrind)
35    return false;
36  return RUNNING_ON_VALGRIND;
37}
38
39void 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
48bool llvm::sys::RunningOnValgrind() {
49  return false;
50}
51
52void llvm::sys::ValgrindDiscardTranslations(const void *Addr, size_t Len) {
53}
54
55#endif  // !HAVE_VALGRIND_VALGRIND_H
56