contrib/llvm/tools/clang/lib/Basic/XRayLists.cpp

   1 //===--- XRayFunctionFilter.cpp - XRay automatic-attribution --------------===//
   2 //
   3 //                     The LLVM Compiler Infrastructure
   4 //
   5 // This file is distributed under the University of Illinois Open Source
   6 // License. See LICENSE.TXT for details.
   7 //
   8 //===----------------------------------------------------------------------===//
   9 //
  10 // User-provided filters for always/never XRay instrumenting certain functions.
  11 //
  12 //===----------------------------------------------------------------------===//
  13 #include "clang/Basic/XRayLists.h"
  14
  15 using namespace clang;
  16
  17 XRayFunctionFilter::XRayFunctionFilter(
  18     ArrayRef<std::string> AlwaysInstrumentPaths,
  19     ArrayRef<std::string> NeverInstrumentPaths, SourceManager &SM)
  20     : AlwaysInstrument(
  21           llvm::SpecialCaseList::createOrDie(AlwaysInstrumentPaths)),
  22       NeverInstrument(llvm::SpecialCaseList::createOrDie(NeverInstrumentPaths)),
  23       SM(SM) {}
  24
  25 XRayFunctionFilter::ImbueAttribute
  26 XRayFunctionFilter::shouldImbueFunction(StringRef FunctionName) const {
  27   // First apply the always instrument list, than if it isn't an "always" see
  28   // whether it's treated as a "never" instrument function.
  29   if (AlwaysInstrument->inSection("xray_always_instrument", "fun", FunctionName,
  30                                   "arg1"))
  31     return ImbueAttribute::ALWAYS_ARG1;
  32   if (AlwaysInstrument->inSection("xray_always_instrument", "fun",
  33                                   FunctionName))
  34     return ImbueAttribute::ALWAYS;
  35   if (NeverInstrument->inSection("xray_never_instrument", "fun", FunctionName))
  36     return ImbueAttribute::NEVER;
  37   return ImbueAttribute::NONE;
  38 }
  39
  40 XRayFunctionFilter::ImbueAttribute
  41 XRayFunctionFilter::shouldImbueFunctionsInFile(StringRef Filename,
  42                                                StringRef Category) const {
  43   if (AlwaysInstrument->inSection("xray_always_instrument", "src", Filename,
  44                                   Category))
  45     return ImbueAttribute::ALWAYS;
  46   if (NeverInstrument->inSection("xray_never_instrument", "src", Filename,
  47                                  Category))
  48     return ImbueAttribute::NEVER;
  49   return ImbueAttribute::NONE;
  50 }
  51
  52 XRayFunctionFilter::ImbueAttribute
  53 XRayFunctionFilter::shouldImbueLocation(SourceLocation Loc,
  54                                         StringRef Category) const {
  55   if (!Loc.isValid())
  56     return ImbueAttribute::NONE;
  57   return this->shouldImbueFunctionsInFile(SM.getFilename(SM.getFileLoc(Loc)),
  58                                           Category);
  59 }