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 22static 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. 30static const bool NotUnderValgrind = InitNotUnderValgrind(); 31 32bool llvm::sys::RunningOnValgrind() { 33 if (NotUnderValgrind) 34 return false; 35 return RUNNING_ON_VALGRIND; 36} 37 38void 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 47bool llvm::sys::RunningOnValgrind() { 48 return false; 49} 50 51void llvm::sys::ValgrindDiscardTranslations(const void *Addr, size_t Len) { 52} 53 54#endif // !HAVE_VALGRIND_VALGRIND_H 55