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ae65e281f3
to reflect the new license. We understand that people may be surprised that we're moving the header entirely to discuss the new license. We checked this carefully with the Foundation's lawyer and we believe this is the correct approach. Essentially, all code in the project is now made available by the LLVM project under our new license, so you will see that the license headers include that license only. Some of our contributors have contributed code under our old license, and accordingly, we have retained a copy of our old license notice in the top-level files in each project and repository. llvm-svn: 351636
97 lines
2.8 KiB
C++
97 lines
2.8 KiB
C++
//===--- DWARFVisitor.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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//===----------------------------------------------------------------------===//
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#ifndef LLVM_OBJECTYAML_DWARFVISITOR_H
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#define LLVM_OBJECTYAML_DWARFVISITOR_H
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#include "llvm/ADT/StringRef.h"
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#include "llvm/BinaryFormat/Dwarf.h"
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#include "llvm/Support/MemoryBuffer.h"
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namespace llvm {
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namespace DWARFYAML {
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struct Data;
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struct Unit;
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struct Entry;
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struct FormValue;
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struct AttributeAbbrev;
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/// A class to visits DWARFYAML Compile Units and DIEs in preorder.
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///
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/// Extensions of this class can either maintain const or non-const references
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/// to the DWARFYAML::Data object.
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template <typename T> class VisitorImpl {
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protected:
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T &DebugInfo;
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/// Visitor Functions
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/// @{
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virtual void onStartCompileUnit(Unit &CU) {}
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virtual void onEndCompileUnit(Unit &CU) {}
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virtual void onStartDIE(Unit &CU, Entry &DIE) {}
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virtual void onEndDIE(Unit &CU, Entry &DIE) {}
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virtual void onForm(AttributeAbbrev &AttAbbrev, FormValue &Value) {}
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/// @}
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/// Const Visitor Functions
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/// @{
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virtual void onStartCompileUnit(const Unit &CU) {}
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virtual void onEndCompileUnit(const Unit &CU) {}
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virtual void onStartDIE(const Unit &CU, const Entry &DIE) {}
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virtual void onEndDIE(const Unit &CU, const Entry &DIE) {}
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virtual void onForm(const AttributeAbbrev &AttAbbrev,
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const FormValue &Value) {}
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/// @}
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/// Value visitors
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/// @{
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virtual void onValue(const uint8_t U) {}
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virtual void onValue(const uint16_t U) {}
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virtual void onValue(const uint32_t U) {}
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virtual void onValue(const uint64_t U, const bool LEB = false) {}
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virtual void onValue(const int64_t S, const bool LEB = false) {}
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virtual void onValue(const StringRef String) {}
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virtual void onValue(const MemoryBufferRef MBR) {}
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/// @}
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public:
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VisitorImpl(T &DI) : DebugInfo(DI) {}
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virtual ~VisitorImpl() {}
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void traverseDebugInfo();
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private:
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void onVariableSizeValue(uint64_t U, unsigned Size);
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};
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// Making the visior instantiations extern and explicit in the cpp file. This
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// prevents them from being instantiated in every compile unit that uses the
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// visitors.
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extern template class VisitorImpl<DWARFYAML::Data>;
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extern template class VisitorImpl<const DWARFYAML::Data>;
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class Visitor : public VisitorImpl<Data> {
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public:
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Visitor(Data &DI) : VisitorImpl<Data>(DI) {}
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};
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class ConstVisitor : public VisitorImpl<const Data> {
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public:
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ConstVisitor(const Data &DI) : VisitorImpl<const Data>(DI) {}
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};
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} // namespace DWARFYAML
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} // namespace llvm
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#endif
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