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 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 56 #if LLVM_ENABLE_THREADS != 0 && !defined(NDEBUG) 57 // These functions require no implementation, tsan just looks at the arguments 58 // they're called with. However, they are required to be weak as some other 59 // application or library may already be providing these definitions for the 60 // same reason we are. 61 extern "C" { 62 LLVM_ATTRIBUTE_WEAK void AnnotateHappensAfter(const char *file, int line, 63 const volatile void *cv); 64 void AnnotateHappensAfter(const char *file, int line, const volatile void *cv) { 65 } 66 LLVM_ATTRIBUTE_WEAK void AnnotateHappensBefore(const char *file, int line, 67 const volatile void *cv); 68 void AnnotateHappensBefore(const char *file, int line, 69 const volatile void *cv) {} 70 LLVM_ATTRIBUTE_WEAK void AnnotateIgnoreWritesBegin(const char *file, int line); 71 void AnnotateIgnoreWritesBegin(const char *file, int line) {} 72 LLVM_ATTRIBUTE_WEAK void AnnotateIgnoreWritesEnd(const char *file, int line); 73 void AnnotateIgnoreWritesEnd(const char *file, int line) {} 74 } 75 #endif 76
