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 32 bool llvm::sys::RunningOnValgrind() { 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 47 bool llvm::sys::RunningOnValgrind() { 48 return false; 49 } 50 51 void llvm::sys::ValgrindDiscardTranslations(const void *Addr, size_t Len) { 52 } 53 54 #endif // !HAVE_VALGRIND_VALGRIND_H 55