XRayLists.cpp
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//===-- XRayLists.cpp - XRay automatic-attribution ------------------------===//
//
// 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
//
//===----------------------------------------------------------------------===//
//
// User-provided filters for always/never XRay instrumenting certain functions.
//
//===----------------------------------------------------------------------===//
#include "clang/Basic/XRayLists.h"
#include "clang/Basic/FileManager.h"
#include "clang/Basic/SourceManager.h"
#include "llvm/Support/SpecialCaseList.h"
using namespace clang;
XRayFunctionFilter::XRayFunctionFilter(
ArrayRef<std::string> AlwaysInstrumentPaths,
ArrayRef<std::string> NeverInstrumentPaths,
ArrayRef<std::string> AttrListPaths, SourceManager &SM)
: AlwaysInstrument(llvm::SpecialCaseList::createOrDie(
AlwaysInstrumentPaths, SM.getFileManager().getVirtualFileSystem())),
NeverInstrument(llvm::SpecialCaseList::createOrDie(
NeverInstrumentPaths, SM.getFileManager().getVirtualFileSystem())),
AttrList(llvm::SpecialCaseList::createOrDie(
AttrListPaths, SM.getFileManager().getVirtualFileSystem())),
SM(SM) {}
XRayFunctionFilter::~XRayFunctionFilter() = default;
XRayFunctionFilter::ImbueAttribute
XRayFunctionFilter::shouldImbueFunction(StringRef FunctionName) const {
// First apply the always instrument list, than if it isn't an "always" see
// whether it's treated as a "never" instrument function.
// TODO: Remove these as they're deprecated; use the AttrList exclusively.
if (AlwaysInstrument->inSection("xray_always_instrument", "fun", FunctionName,
"arg1") ||
AttrList->inSection("always", "fun", FunctionName, "arg1"))
return ImbueAttribute::ALWAYS_ARG1;
if (AlwaysInstrument->inSection("xray_always_instrument", "fun",
FunctionName) ||
AttrList->inSection("always", "fun", FunctionName))
return ImbueAttribute::ALWAYS;
if (NeverInstrument->inSection("xray_never_instrument", "fun",
FunctionName) ||
AttrList->inSection("never", "fun", FunctionName))
return ImbueAttribute::NEVER;
return ImbueAttribute::NONE;
}
XRayFunctionFilter::ImbueAttribute
XRayFunctionFilter::shouldImbueFunctionsInFile(StringRef Filename,
StringRef Category) const {
if (AlwaysInstrument->inSection("xray_always_instrument", "src", Filename,
Category) ||
AttrList->inSection("always", "src", Filename, Category))
return ImbueAttribute::ALWAYS;
if (NeverInstrument->inSection("xray_never_instrument", "src", Filename,
Category) ||
AttrList->inSection("never", "src", Filename, Category))
return ImbueAttribute::NEVER;
return ImbueAttribute::NONE;
}
XRayFunctionFilter::ImbueAttribute
XRayFunctionFilter::shouldImbueLocation(SourceLocation Loc,
StringRef Category) const {
if (!Loc.isValid())
return ImbueAttribute::NONE;
return this->shouldImbueFunctionsInFile(SM.getFilename(SM.getFileLoc(Loc)),
Category);
}