20dc6ef746
Summary: This change consolidates the always/never lists that may be provided to clang to externally control which functions should be XRay instrumented by imbuing attributes. The files follow the same format as defined in https://clang.llvm.org/docs/SanitizerSpecialCaseList.html for the sanitizer blacklist. We also deprecate the existing `-fxray-instrument-always=` and `-fxray-instrument-never=` flags, in favour of `-fxray-attr-list=`. This fixes http://llvm.org/PR34721. Reviewers: echristo, vlad.tsyrklevich, eugenis Reviewed By: vlad.tsyrklevich Subscribers: llvm-commits, cfe-commits Differential Revision: https://reviews.llvm.org/D45357 llvm-svn: 329543
70 lines
3.0 KiB
C++
70 lines
3.0 KiB
C++
//===--- XRayFunctionFilter.cpp - XRay automatic-attribution --------------===//
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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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// User-provided filters for always/never XRay instrumenting certain functions.
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//
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//===----------------------------------------------------------------------===//
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#include "clang/Basic/XRayLists.h"
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using namespace clang;
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XRayFunctionFilter::XRayFunctionFilter(
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ArrayRef<std::string> AlwaysInstrumentPaths,
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ArrayRef<std::string> NeverInstrumentPaths,
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ArrayRef<std::string> AttrListPaths, SourceManager &SM)
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: AlwaysInstrument(
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llvm::SpecialCaseList::createOrDie(AlwaysInstrumentPaths)),
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NeverInstrument(llvm::SpecialCaseList::createOrDie(NeverInstrumentPaths)),
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AttrList(llvm::SpecialCaseList::createOrDie(AttrListPaths)), SM(SM) {}
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XRayFunctionFilter::ImbueAttribute
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XRayFunctionFilter::shouldImbueFunction(StringRef FunctionName) const {
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// First apply the always instrument list, than if it isn't an "always" see
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// whether it's treated as a "never" instrument function.
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// TODO: Remove these as they're deprecated; use the AttrList exclusively.
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if (AlwaysInstrument->inSection("xray_always_instrument", "fun", FunctionName,
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"arg1") ||
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AttrList->inSection("always", "fun", FunctionName, "arg1"))
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return ImbueAttribute::ALWAYS_ARG1;
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if (AlwaysInstrument->inSection("xray_always_instrument", "fun",
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FunctionName) ||
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AttrList->inSection("always", "fun", FunctionName))
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return ImbueAttribute::ALWAYS;
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if (NeverInstrument->inSection("xray_never_instrument", "fun",
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FunctionName) ||
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AttrList->inSection("never", "fun", FunctionName))
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return ImbueAttribute::NEVER;
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return ImbueAttribute::NONE;
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}
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XRayFunctionFilter::ImbueAttribute
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XRayFunctionFilter::shouldImbueFunctionsInFile(StringRef Filename,
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StringRef Category) const {
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if (AlwaysInstrument->inSection("xray_always_instrument", "src", Filename,
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Category) ||
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AttrList->inSection("always", "src", Filename, Category))
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return ImbueAttribute::ALWAYS;
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if (NeverInstrument->inSection("xray_never_instrument", "src", Filename,
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Category) ||
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AttrList->inSection("never", "src", Filename, Category))
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return ImbueAttribute::NEVER;
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return ImbueAttribute::NONE;
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}
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XRayFunctionFilter::ImbueAttribute
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XRayFunctionFilter::shouldImbueLocation(SourceLocation Loc,
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StringRef Category) const {
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if (!Loc.isValid())
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return ImbueAttribute::NONE;
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return this->shouldImbueFunctionsInFile(SM.getFilename(SM.getFileLoc(Loc)),
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Category);
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}
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