4bde15fe1e
While we implemented taint propagation rules for several builtin/standard functions, there's a natural desire for users to add such rules to custom functions. A series of patches will implement an option that allows users to annotate their functions with taint propagation rules through a YAML file. This one adds parsing of the configuration file, which may be specified in the commands line with the analyzer config: alpha.security.taint.TaintPropagation:Config. The configuration may contain propagation rules, filter functions (remove taint) and sink functions (give a warning if it gets a tainted value). I also added a new header for future checkers to conveniently read YAML files as checker options. Differential Revision: https://reviews.llvm.org/D59555 llvm-svn: 367190
60 lines
2.0 KiB
C++
Executable File
60 lines
2.0 KiB
C++
Executable File
//== Yaml.h ---------------------------------------------------- -*- C++ -*--=//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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//
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// This file defines convenience functions for handling YAML configuration files
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// for checkers/packages.
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//
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//===----------------------------------------------------------------------===//
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#ifndef LLVM_CLANG_LIB_STATICANALYZER_CHECKER_YAML_H
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#define LLVM_CLANG_LIB_STATICANALYZER_CHECKER_YAML_H
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#include "clang/StaticAnalyzer/Core/CheckerManager.h"
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#include "llvm/Support/YAMLTraits.h"
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namespace clang {
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namespace ento {
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/// Read the given file from the filesystem and parse it as a yaml file. The
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/// template parameter must have a yaml MappingTraits.
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/// Emit diagnostic error in case of any failure.
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template <class T, class Checker>
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llvm::Optional<T> getConfiguration(CheckerManager &Mgr, Checker *Chk,
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StringRef Option, StringRef ConfigFile) {
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if (ConfigFile.trim().empty())
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return None;
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llvm::vfs::FileSystem *FS = llvm::vfs::getRealFileSystem().get();
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llvm::ErrorOr<std::unique_ptr<llvm::MemoryBuffer>> Buffer =
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FS->getBufferForFile(ConfigFile.str());
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if (std::error_code ec = Buffer.getError()) {
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Mgr.reportInvalidCheckerOptionValue(Chk, Option,
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"a valid filename instead of '" +
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std::string(ConfigFile) + "'");
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return None;
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}
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llvm::yaml::Input Input(Buffer.get()->getBuffer());
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T Config;
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Input >> Config;
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if (std::error_code ec = Input.error()) {
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Mgr.reportInvalidCheckerOptionValue(Chk, Option,
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"a valid yaml file: " + ec.message());
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return None;
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}
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return Config;
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}
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} // namespace ento
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} // namespace clang
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#endif // LLVM_CLANG_LIB_STATICANALYZER_CHECKERS_MOVE_H
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