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282314741d
Summary: This change allows users to create SpecialCaseList objects from multiple local files. This is needed to implement a proper support for -fsanitize-blacklist flag (allow users to specify multiple blacklists, in addition to default blacklist, see PR22431). DFSan can also benefit from this change, as DFSan instrumentation pass now accepts ABI-lists both from -fsanitize-blacklist= and -mllvm -dfsan-abilist flags. Go bindings are fixed accordingly. Test Plan: regression test suite Reviewers: pcc Subscribers: llvm-commits, axw, kcc Differential Revision: http://reviews.llvm.org/D7367 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@228155 91177308-0d34-0410-b5e6-96231b3b80d8
105 lines
3.8 KiB
C++
105 lines
3.8 KiB
C++
//===-- SpecialCaseList.h - special case list for sanitizers ----*- C++ -*-===//
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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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// This is a utility class used to parse user-provided text files with
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// "special case lists" for code sanitizers. Such files are used to
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// define "ABI list" for DataFlowSanitizer and blacklists for another sanitizers
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// like AddressSanitizer or UndefinedBehaviorSanitizer.
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//
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// Empty lines and lines starting with "#" are ignored. All the rest lines
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// should have the form:
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// section:wildcard_expression[=category]
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// If category is not specified, it is assumed to be empty string.
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// Definitions of "section" and "category" are sanitizer-specific. For example,
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// sanitizer blacklists support sections "src", "fun" and "global".
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// Wildcard expressions define, respectively, source files, functions or
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// globals which shouldn't be instrumented.
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// Examples of categories:
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// "functional": used in DFSan to list functions with pure functional
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// semantics.
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// "init": used in ASan blacklist to disable initialization-order bugs
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// detection for certain globals or source files.
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// Full special case list file example:
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// ---
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// # Blacklisted items:
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// fun:*_ZN4base6subtle*
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// global:*global_with_bad_access_or_initialization*
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// global:*global_with_initialization_issues*=init
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// type:*Namespace::ClassName*=init
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// src:file_with_tricky_code.cc
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// src:ignore-global-initializers-issues.cc=init
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//
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// # Functions with pure functional semantics:
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// fun:cos=functional
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// fun:sin=functional
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// ---
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// Note that the wild card is in fact an llvm::Regex, but * is automatically
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// replaced with .*
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// This is similar to the "ignore" feature of ThreadSanitizer.
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// http://code.google.com/p/data-race-test/wiki/ThreadSanitizerIgnores
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//
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//===----------------------------------------------------------------------===//
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#ifndef LLVM_SUPPORT_SPECIALCASELIST_H
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#define LLVM_SUPPORT_SPECIALCASELIST_H
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#include "llvm/ADT/StringMap.h"
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#include <string>
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#include <vector>
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namespace llvm {
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class MemoryBuffer;
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class Regex;
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class StringRef;
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class SpecialCaseList {
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public:
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/// Parses the special case list entries from files. On failure, returns
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/// 0 and writes an error message to string.
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static std::unique_ptr<SpecialCaseList>
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create(const std::vector<std::string> &Paths, std::string &Error);
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/// Parses the special case list from a memory buffer. On failure, returns
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/// 0 and writes an error message to string.
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static std::unique_ptr<SpecialCaseList> create(const MemoryBuffer *MB,
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std::string &Error);
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/// Parses the special case list entries from files. On failure, reports a
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/// fatal error.
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static std::unique_ptr<SpecialCaseList>
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createOrDie(const std::vector<std::string> &Paths);
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~SpecialCaseList();
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/// Returns true, if special case list contains a line
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/// \code
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/// @Section:<E>=@Category
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/// \endcode
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/// and @Query satisfies a wildcard expression <E>.
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bool inSection(StringRef Section, StringRef Query,
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StringRef Category = StringRef()) const;
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private:
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SpecialCaseList(SpecialCaseList const &) LLVM_DELETED_FUNCTION;
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SpecialCaseList &operator=(SpecialCaseList const &) LLVM_DELETED_FUNCTION;
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struct Entry;
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StringMap<StringMap<Entry>> Entries;
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StringMap<StringMap<std::string>> Regexps;
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bool IsCompiled;
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SpecialCaseList();
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/// Parses just-constructed SpecialCaseList entries from a memory buffer.
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bool parse(const MemoryBuffer *MB, std::string &Error);
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/// compile() should be called once, after parsing all the memory buffers.
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void compile();
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};
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} // namespace llvm
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#endif // LLVM_SUPPORT_SPECIALCASELIST_H
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