LLVM  9.0.0svn
Valgrind.cpp
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1 //===-- Valgrind.cpp - Implement Valgrind communication ---------*- C++ -*-===//
2 //
3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4 // See https://llvm.org/LICENSE.txt for license information.
5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6 //
7 //===----------------------------------------------------------------------===//
8 //
9 // Defines Valgrind communication methods, if HAVE_VALGRIND_VALGRIND_H is
10 // defined. If we have valgrind.h but valgrind isn't running, its macros are
11 // no-ops.
12 //
13 //===----------------------------------------------------------------------===//
14 
15 #include "llvm/Support/Valgrind.h"
16 #include "llvm/Config/config.h"
17 #include <cstddef>
18 
19 #if HAVE_VALGRIND_VALGRIND_H
20 #include <valgrind/valgrind.h>
21 
22 static bool InitNotUnderValgrind() {
23  return !RUNNING_ON_VALGRIND;
24 }
25 
26 // This bool is negated from what we'd expect because code may run before it
27 // gets initialized. If that happens, it will appear to be 0 (false), and we
28 // want that to cause the rest of the code in this file to run the
29 // Valgrind-provided macros.
30 static const bool NotUnderValgrind = InitNotUnderValgrind();
31 
33  if (NotUnderValgrind)
34  return false;
35  return RUNNING_ON_VALGRIND;
36 }
37 
38 void llvm::sys::ValgrindDiscardTranslations(const void *Addr, size_t Len) {
39  if (NotUnderValgrind)
40  return;
41 
42  VALGRIND_DISCARD_TRANSLATIONS(Addr, Len);
43 }
44 
45 #else // !HAVE_VALGRIND_VALGRIND_H
46 
48  return false;
49 }
50 
51 void llvm::sys::ValgrindDiscardTranslations(const void *Addr, size_t Len) {
52 }
53 
54 #endif // !HAVE_VALGRIND_VALGRIND_H
void ValgrindDiscardTranslations(const void *Addr, size_t Len)
Definition: Valgrind.cpp:51
bool RunningOnValgrind()
Definition: Valgrind.cpp:47