44f19514d4
Typedefs are represented as S_UDT records in the globals stream. This creates a strange situation where "types" are actually represented as "symbols", so they need special handling. In order to test this, we don't just use lldb and print out some variables causing the AST to get created, because variables whose type is a typedef will have debug info referencing the original type, not the typedef. So we use lldb-test instead which will parse all debug info in the entire file. This exposed some problems with lldb-test and the native reader, mainly that certain types of obscure symbols which we can find when iterating every single record would trigger crashes. These have been fixed as well so that lldb-test can be used to test this functionality. Differential Revision: https://reviews.llvm.org/D56461 llvm-svn: 350888
160 lines
4.4 KiB
C++
160 lines
4.4 KiB
C++
//===-- PdbUtil.h -----------------------------------------------*- 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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#ifndef LLDB_PLUGINS_SYMBOLFILENATIVEPDB_PDBUTIL_H
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#define LLDB_PLUGINS_SYMBOLFILENATIVEPDB_PDBUTIL_H
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#include "lldb/Expression/DWARFExpression.h"
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#include "lldb/Symbol/Variable.h"
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#include "lldb/lldb-enumerations.h"
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#include "llvm/ADT/Optional.h"
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#include "llvm/DebugInfo/CodeView/CodeView.h"
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#include "llvm/DebugInfo/CodeView/SymbolRecord.h"
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#include "llvm/DebugInfo/CodeView/TypeRecord.h"
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#include "llvm/DebugInfo/PDB/PDBTypes.h"
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#include "PdbSymUid.h"
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#include <tuple>
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#include <utility>
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namespace llvm {
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namespace pdb {
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class TpiStream;
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}
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} // namespace llvm
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namespace lldb_private {
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namespace npdb {
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class PdbIndex;
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struct CVTagRecord {
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enum Kind { Class, Struct, Union, Enum };
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static CVTagRecord create(llvm::codeview::CVType type);
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Kind kind() const { return m_kind; }
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const llvm::codeview::TagRecord &asTag() const {
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if (m_kind == Struct || m_kind == Class)
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return cvclass;
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if (m_kind == Enum)
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return cvenum;
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return cvunion;
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}
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const llvm::codeview::ClassRecord &asClass() const {
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assert(m_kind == Struct || m_kind == Class);
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return cvclass;
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}
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const llvm::codeview::EnumRecord &asEnum() const {
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assert(m_kind == Enum);
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return cvenum;
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}
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const llvm::codeview::UnionRecord &asUnion() const {
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assert(m_kind == Union);
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return cvunion;
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}
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llvm::StringRef name() const {
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if (m_kind == Struct || m_kind == Union)
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return cvclass.Name;
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if (m_kind == Enum)
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return cvenum.Name;
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return cvunion.Name;
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}
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private:
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CVTagRecord(llvm::codeview::ClassRecord &&c);
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CVTagRecord(llvm::codeview::UnionRecord &&u);
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CVTagRecord(llvm::codeview::EnumRecord &&e);
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union {
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llvm::codeview::ClassRecord cvclass;
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llvm::codeview::EnumRecord cvenum;
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llvm::codeview::UnionRecord cvunion;
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};
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Kind m_kind;
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};
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struct SegmentOffset {
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SegmentOffset() = default;
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SegmentOffset(uint16_t s, uint32_t o) : segment(s), offset(o) {}
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uint16_t segment = 0;
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uint32_t offset = 0;
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};
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struct SegmentOffsetLength {
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SegmentOffsetLength() = default;
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SegmentOffsetLength(uint16_t s, uint32_t o, uint32_t l)
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: so(s, o), length(l) {}
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SegmentOffset so;
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uint32_t length = 0;
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};
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struct VariableInfo {
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llvm::StringRef name;
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llvm::codeview::TypeIndex type;
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llvm::Optional<DWARFExpression> location;
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llvm::Optional<Variable::RangeList> ranges;
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};
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llvm::pdb::PDB_SymType CVSymToPDBSym(llvm::codeview::SymbolKind kind);
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llvm::pdb::PDB_SymType CVTypeToPDBType(llvm::codeview::TypeLeafKind kind);
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bool SymbolHasAddress(const llvm::codeview::CVSymbol &sym);
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bool SymbolIsCode(const llvm::codeview::CVSymbol &sym);
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SegmentOffset GetSegmentAndOffset(const llvm::codeview::CVSymbol &sym);
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SegmentOffsetLength
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GetSegmentOffsetAndLength(const llvm::codeview::CVSymbol &sym);
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template <typename RecordT> bool IsValidRecord(const RecordT &sym) {
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return true;
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}
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inline bool IsValidRecord(const llvm::codeview::ProcRefSym &sym) {
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// S_PROCREF symbols have 1-based module indices.
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return sym.Module > 0;
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}
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bool IsForwardRefUdt(llvm::codeview::CVType cvt);
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bool IsTagRecord(llvm::codeview::CVType cvt);
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bool IsClassStructUnion(llvm::codeview::CVType cvt);
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bool IsForwardRefUdt(const PdbTypeSymId &id, llvm::pdb::TpiStream &tpi);
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bool IsTagRecord(const PdbTypeSymId &id, llvm::pdb::TpiStream &tpi);
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lldb::AccessType TranslateMemberAccess(llvm::codeview::MemberAccess access);
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llvm::codeview::TypeIndex GetFieldListIndex(llvm::codeview::CVType cvt);
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llvm::codeview::TypeIndex
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LookThroughModifierRecord(llvm::codeview::CVType modifier);
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llvm::StringRef DropNameScope(llvm::StringRef name);
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VariableInfo GetVariableNameInfo(llvm::codeview::CVSymbol symbol);
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VariableInfo GetVariableLocationInfo(PdbIndex &index, PdbCompilandSymId var_id,
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lldb::ModuleSP module);
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size_t GetTypeSizeForSimpleKind(llvm::codeview::SimpleTypeKind kind);
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lldb::BasicType
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GetCompilerTypeForSimpleKind(llvm::codeview::SimpleTypeKind kind);
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PdbTypeSymId GetBestPossibleDecl(PdbTypeSymId id, llvm::pdb::TpiStream &tpi);
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size_t GetSizeOfType(PdbTypeSymId id, llvm::pdb::TpiStream &tpi);
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} // namespace npdb
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} // namespace lldb_private
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#endif
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