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