Subversion Repositories QNX 8.QNX8 LLVM/Clang compiler suite

//===- ELF AttributeParser.h - ELF Attribute Parser -------------*- C++ -*-===//

//

// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.

// See https://llvm.org/LICENSE.txt for license information.

// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception

//

//===----------------------------------------------------------------------===//

#ifndef LLVM_SUPPORT_ELFATTRIBUTEPARSER_H

#define LLVM_SUPPORT_ELFATTRIBUTEPARSER_H

#include "ELFAttributes.h"

#include "llvm/ADT/ArrayRef.h"

#include "llvm/Support/DataExtractor.h"

#include "llvm/Support/Endian.h"

#include "llvm/Support/Error.h"

#include <optional>

#include <unordered_map>

namespace llvm {

class StringRef;

class ScopedPrinter;

class ELFAttributeParser {

  StringRef vendor;

  std::unordered_map<unsigned, unsigned> attributes;

  std::unordered_map<unsigned, StringRef> attributesStr;

  virtual Error handler(uint64_t tag, bool &handled) = 0;

protected:

  ScopedPrinter *sw;

  TagNameMap tagToStringMap;

  DataExtractor de{ArrayRef<uint8_t>{}, true, 0};

  DataExtractor::Cursor cursor{0};

  void printAttribute(unsigned tag, unsigned value, StringRef valueDesc);

  Error parseStringAttribute(const char *name, unsigned tag,

                             ArrayRef<const char *> strings);

  Error parseAttributeList(uint32_t length);

  void parseIndexList(SmallVectorImpl<uint8_t> &indexList);

  Error parseSubsection(uint32_t length);

  void setAttributeString(unsigned tag, StringRef value) {

    attributesStr.emplace(tag, value);

  }

public:

  virtual ~ELFAttributeParser() { static_cast<void>(!cursor.takeError()); }

  Error integerAttribute(unsigned tag);

  Error stringAttribute(unsigned tag);

  ELFAttributeParser(ScopedPrinter *sw, TagNameMap tagNameMap, StringRef vendor)

      : vendor(vendor), sw(sw), tagToStringMap(tagNameMap) {}

  ELFAttributeParser(TagNameMap tagNameMap, StringRef vendor)

      : vendor(vendor), sw(nullptr), tagToStringMap(tagNameMap) {}

  Error parse(ArrayRef<uint8_t> section, support::endianness endian);

  std::optional<unsigned> getAttributeValue(unsigned tag) const {

    auto I = attributes.find(tag);

    if (I == attributes.end())

      return std::nullopt;

    return I->second;

  }

  std::optional<StringRef> getAttributeString(unsigned tag) const {

    auto I = attributesStr.find(tag);

    if (I == attributesStr.end())

      return std::nullopt;

    return I->second;

  }

};

} // namespace llvm

#endif