1 //===-- XRayLists.cpp - XRay automatic-attribution ------------------------===//
2 //
3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4 // See https://llvm.org/LICENSE.txt for license information.
5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6 //
7 //===----------------------------------------------------------------------===//
8 //
9 // User-provided filters for always/never XRay instrumenting certain functions.
10 //
11 //===----------------------------------------------------------------------===//
12 #include "clang/Basic/XRayLists.h"
13
14 using namespace clang;
15
XRayFunctionFilter(ArrayRef<std::string> AlwaysInstrumentPaths,ArrayRef<std::string> NeverInstrumentPaths,ArrayRef<std::string> AttrListPaths,SourceManager & SM)16 XRayFunctionFilter::XRayFunctionFilter(
17 ArrayRef<std::string> AlwaysInstrumentPaths,
18 ArrayRef<std::string> NeverInstrumentPaths,
19 ArrayRef<std::string> AttrListPaths, SourceManager &SM)
20 : AlwaysInstrument(llvm::SpecialCaseList::createOrDie(
21 AlwaysInstrumentPaths, SM.getFileManager().getVirtualFileSystem())),
22 NeverInstrument(llvm::SpecialCaseList::createOrDie(
23 NeverInstrumentPaths, SM.getFileManager().getVirtualFileSystem())),
24 AttrList(llvm::SpecialCaseList::createOrDie(
25 AttrListPaths, SM.getFileManager().getVirtualFileSystem())),
26 SM(SM) {}
27
28 XRayFunctionFilter::ImbueAttribute
shouldImbueFunction(StringRef FunctionName) const29 XRayFunctionFilter::shouldImbueFunction(StringRef FunctionName) const {
30 // First apply the always instrument list, than if it isn't an "always" see
31 // whether it's treated as a "never" instrument function.
32 // TODO: Remove these as they're deprecated; use the AttrList exclusively.
33 if (AlwaysInstrument->inSection("xray_always_instrument", "fun", FunctionName,
34 "arg1") ||
35 AttrList->inSection("always", "fun", FunctionName, "arg1"))
36 return ImbueAttribute::ALWAYS_ARG1;
37 if (AlwaysInstrument->inSection("xray_always_instrument", "fun",
38 FunctionName) ||
39 AttrList->inSection("always", "fun", FunctionName))
40 return ImbueAttribute::ALWAYS;
41
42 if (NeverInstrument->inSection("xray_never_instrument", "fun",
43 FunctionName) ||
44 AttrList->inSection("never", "fun", FunctionName))
45 return ImbueAttribute::NEVER;
46
47 return ImbueAttribute::NONE;
48 }
49
50 XRayFunctionFilter::ImbueAttribute
shouldImbueFunctionsInFile(StringRef Filename,StringRef Category) const51 XRayFunctionFilter::shouldImbueFunctionsInFile(StringRef Filename,
52 StringRef Category) const {
53 if (AlwaysInstrument->inSection("xray_always_instrument", "src", Filename,
54 Category) ||
55 AttrList->inSection("always", "src", Filename, Category))
56 return ImbueAttribute::ALWAYS;
57 if (NeverInstrument->inSection("xray_never_instrument", "src", Filename,
58 Category) ||
59 AttrList->inSection("never", "src", Filename, Category))
60 return ImbueAttribute::NEVER;
61 return ImbueAttribute::NONE;
62 }
63
64 XRayFunctionFilter::ImbueAttribute
shouldImbueLocation(SourceLocation Loc,StringRef Category) const65 XRayFunctionFilter::shouldImbueLocation(SourceLocation Loc,
66 StringRef Category) const {
67 if (!Loc.isValid())
68 return ImbueAttribute::NONE;
69 return this->shouldImbueFunctionsInFile(SM.getFilename(SM.getFileLoc(Loc)),
70 Category);
71 }
72