b2489b7484
link it against llvm code, by making our definitions weak. "Some users." llvm-svn: 144596
66 lines
2.1 KiB
C++
66 lines
2.1 KiB
C++
//===-- Valgrind.cpp - Implement Valgrind communication ---------*- C++ -*-===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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//
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// Defines Valgrind communication methods, if HAVE_VALGRIND_VALGRIND_H is
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// defined. If we have valgrind.h but valgrind isn't running, its macros are
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// no-ops.
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//
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//===----------------------------------------------------------------------===//
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#include "llvm/Support/Valgrind.h"
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#include "llvm/Config/config.h"
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#if HAVE_VALGRIND_VALGRIND_H
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#include <valgrind/valgrind.h>
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static bool InitNotUnderValgrind() {
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return !RUNNING_ON_VALGRIND;
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}
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// This bool is negated from what we'd expect because code may run before it
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// gets initialized. If that happens, it will appear to be 0 (false), and we
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// want that to cause the rest of the code in this file to run the
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// Valgrind-provided macros.
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static const bool NotUnderValgrind = InitNotUnderValgrind();
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bool llvm::sys::RunningOnValgrind() {
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if (NotUnderValgrind)
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return false;
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return RUNNING_ON_VALGRIND;
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}
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void llvm::sys::ValgrindDiscardTranslations(const void *Addr, size_t Len) {
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if (NotUnderValgrind)
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return;
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VALGRIND_DISCARD_TRANSLATIONS(Addr, Len);
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}
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#else // !HAVE_VALGRIND_VALGRIND_H
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bool llvm::sys::RunningOnValgrind() {
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return false;
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}
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void llvm::sys::ValgrindDiscardTranslations(const void *Addr, size_t Len) {
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}
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#endif // !HAVE_VALGRIND_VALGRIND_H
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// These functions require no implementation, tsan just looks at the arguments
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// they're called with.
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extern "C" {
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LLVM_ATTRIBUTE_WEAK void AnnotateHappensBefore(const char *file, int line,
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const volatile void *cv) {}
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LLVM_ATTRIBUTE_WEAK void AnnotateHappensAfter(const char *file, int line,
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const volatile void *cv) {}
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LLVM_ATTRIBUTE_WEAK void AnnotateIgnoreWritesBegin(const char *file, int line){}
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LLVM_ATTRIBUTE_WEAK void AnnotateIgnoreWritesEnd(const char *file, int line) {}
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}
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