6284aee9f8
Originally we created our 64-bit UID scheme by using the first byte as sort of a "tag" to represent what kind of symbol this was, and we re-used the PDB_SymType enumeration for this. For native pdb support, this is not really the right abstraction layer, because what we really want is something that tells us *how* to find the symbol. This means, specifically, is in the globals stream / public stream / module stream / TPI stream / etc, and for whichever one it is in, where is it within that stream? A good example of why the old namespacing scheme was insufficient is that it is more or less impossible to create a uid for a field list member of a class/struction/union/enum that tells you how to locate the original record. With this new scheme, the first byte is no longer a PDB_SymType enum but a new enum created specifically to identify where in the PDB this record lives. This gives us much better flexibility in what kinds of symbols the uids can identify. llvm-svn: 347018
96 lines
3.2 KiB
C++
96 lines
3.2 KiB
C++
//===-- CompileUnitIndex.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_COMPILEUNITINDEX_H
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#define LLDB_PLUGINS_SYMBOLFILENATIVEPDB_COMPILEUNITINDEX_H
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#include "llvm/ADT/DenseMap.h"
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#include "llvm/ADT/DenseSet.h"
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#include "llvm/ADT/IntervalMap.h"
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#include "llvm/ADT/Optional.h"
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#include "llvm/DebugInfo/CodeView/StringsAndChecksums.h"
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#include "llvm/DebugInfo/CodeView/SymbolRecord.h"
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#include "llvm/DebugInfo/CodeView/TypeIndex.h"
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#include "llvm/DebugInfo/PDB/Native/DbiModuleDescriptor.h"
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#include "llvm/DebugInfo/PDB/Native/ModuleDebugStream.h"
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#include "llvm/DebugInfo/PDB/PDBTypes.h"
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#include "PdbSymUid.h"
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#include <map>
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#include <memory>
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namespace lldb_private {
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namespace npdb {
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class PdbIndex;
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/// Represents a single compile unit. This class is useful for collecting the
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/// important accessors and information about a compile unit from disparate
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/// parts of the PDB into a single place, simplifying acess to compile unit
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/// information for the callers.
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struct CompilandIndexItem {
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CompilandIndexItem(PdbCompilandId m_id,
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llvm::pdb::ModuleDebugStreamRef debug_stream,
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llvm::pdb::DbiModuleDescriptor descriptor);
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// index of this compile unit.
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PdbCompilandId m_id;
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// debug stream.
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llvm::pdb::ModuleDebugStreamRef m_debug_stream;
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// dbi module descriptor.
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llvm::pdb::DbiModuleDescriptor m_module_descriptor;
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llvm::codeview::StringsAndChecksumsRef m_strings;
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// List of files which contribute to this compiland.
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std::vector<llvm::StringRef> m_file_list;
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// Maps virtual address to global symbol id, which can then be used to
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// locate the exact compile unit and offset of the symbol. Note that this
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// is intentionally an ordered map so that we can find all symbols up to a
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// given starting address.
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std::map<lldb::addr_t, PdbSymUid> m_symbols_by_va;
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// S_COMPILE3 sym describing compilation settings for the module.
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llvm::Optional<llvm::codeview::Compile3Sym> m_compile_opts;
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// S_OBJNAME sym describing object name.
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llvm::Optional<llvm::codeview::ObjNameSym> m_obj_name;
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// LF_BUILDINFO sym describing source file name, working directory,
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// command line, etc. This usually contains exactly 5 items which
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// are references to other strings.
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llvm::SmallVector<llvm::codeview::TypeIndex, 5> m_build_info;
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};
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/// Indexes information about all compile units. This is really just a map of
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/// global compile unit index to |CompilandIndexItem| structures.
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class CompileUnitIndex {
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PdbIndex &m_index;
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llvm::DenseMap<uint16_t, std::unique_ptr<CompilandIndexItem>> m_comp_units;
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public:
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explicit CompileUnitIndex(PdbIndex &index) : m_index(index) {}
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CompilandIndexItem &GetOrCreateCompiland(uint16_t modi);
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const CompilandIndexItem *GetCompiland(uint16_t modi) const;
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CompilandIndexItem *GetCompiland(uint16_t modi);
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llvm::SmallString<64> GetMainSourceFile(const CompilandIndexItem &item) const;
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};
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} // namespace npdb
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} // namespace lldb_private
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#endif
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