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llvm-mirror/lib/Support/Valgrind.cpp
Chandler Carruth ae65e281f3 Update the file headers across all of the LLVM projects in the monorepo
to reflect the new license.

We understand that people may be surprised that we're moving the header
entirely to discuss the new license. We checked this carefully with the
Foundation's lawyer and we believe this is the correct approach.

Essentially, all code in the project is now made available by the LLVM
project under our new license, so you will see that the license headers
include that license only. Some of our contributors have contributed
code under our old license, and accordingly, we have retained a copy of
our old license notice in the top-level files in each project and
repository.

llvm-svn: 351636
2019-01-19 08:50:56 +00:00

55 lines
1.6 KiB
C++

//===-- Valgrind.cpp - Implement Valgrind communication ---------*- C++ -*-===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
//
// Defines Valgrind communication methods, if HAVE_VALGRIND_VALGRIND_H is
// defined. If we have valgrind.h but valgrind isn't running, its macros are
// no-ops.
//
//===----------------------------------------------------------------------===//
#include "llvm/Support/Valgrind.h"
#include "llvm/Config/config.h"
#include <cstddef>
#if HAVE_VALGRIND_VALGRIND_H
#include <valgrind/valgrind.h>
static bool InitNotUnderValgrind() {
return !RUNNING_ON_VALGRIND;
}
// This bool is negated from what we'd expect because code may run before it
// gets initialized. If that happens, it will appear to be 0 (false), and we
// want that to cause the rest of the code in this file to run the
// Valgrind-provided macros.
static const bool NotUnderValgrind = InitNotUnderValgrind();
bool llvm::sys::RunningOnValgrind() {
if (NotUnderValgrind)
return false;
return RUNNING_ON_VALGRIND;
}
void llvm::sys::ValgrindDiscardTranslations(const void *Addr, size_t Len) {
if (NotUnderValgrind)
return;
VALGRIND_DISCARD_TRANSLATIONS(Addr, Len);
}
#else // !HAVE_VALGRIND_VALGRIND_H
bool llvm::sys::RunningOnValgrind() {
return false;
}
void llvm::sys::ValgrindDiscardTranslations(const void *Addr, size_t Len) {
}
#endif // !HAVE_VALGRIND_VALGRIND_H