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