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//===-- 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
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