88 lines
2.9 KiB
C
88 lines
2.9 KiB
C
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//===- GlobalsStream.h - PDB Index of Symbols by Name -----------*- 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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#ifndef LLVM_DEBUGINFO_PDB_RAW_GLOBALS_STREAM_H
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#define LLVM_DEBUGINFO_PDB_RAW_GLOBALS_STREAM_H
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#include "llvm/ADT/iterator.h"
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#include "llvm/DebugInfo/CodeView/SymbolRecord.h"
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#include "llvm/DebugInfo/MSF/MappedBlockStream.h"
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#include "llvm/DebugInfo/PDB/Native/RawConstants.h"
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#include "llvm/DebugInfo/PDB/Native/RawTypes.h"
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#include "llvm/DebugInfo/PDB/PDBTypes.h"
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#include "llvm/Support/BinaryStreamArray.h"
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#include "llvm/Support/Error.h"
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namespace llvm {
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namespace pdb {
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class DbiStream;
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class PDBFile;
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class SymbolStream;
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/// Iterator over hash records producing symbol record offsets. Abstracts away
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/// the fact that symbol record offsets on disk are off-by-one.
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class GSIHashIterator
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: public iterator_adaptor_base<
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GSIHashIterator, FixedStreamArrayIterator<PSHashRecord>,
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std::random_access_iterator_tag, const uint32_t> {
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public:
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template <typename T>
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GSIHashIterator(T &&v)
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: GSIHashIterator::iterator_adaptor_base(std::forward<T &&>(v)) {}
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uint32_t operator*() const {
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uint32_t Off = this->I->Off;
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return --Off;
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}
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};
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/// From https://github.com/Microsoft/microsoft-pdb/blob/master/PDB/dbi/gsi.cpp
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enum : unsigned { IPHR_HASH = 4096 };
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/// A readonly view of a hash table used in the globals and publics streams.
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/// Most clients will only want to iterate this to get symbol record offsets
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/// into the PDB symbol stream.
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class GSIHashTable {
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public:
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const GSIHashHeader *HashHdr;
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FixedStreamArray<PSHashRecord> HashRecords;
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FixedStreamArray<support::ulittle32_t> HashBitmap;
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FixedStreamArray<support::ulittle32_t> HashBuckets;
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std::array<int32_t, IPHR_HASH + 1> BucketMap;
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Error read(BinaryStreamReader &Reader);
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uint32_t getVerSignature() const { return HashHdr->VerSignature; }
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uint32_t getVerHeader() const { return HashHdr->VerHdr; }
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uint32_t getHashRecordSize() const { return HashHdr->HrSize; }
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uint32_t getNumBuckets() const { return HashHdr->NumBuckets; }
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typedef GSIHashHeader iterator;
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GSIHashIterator begin() const { return GSIHashIterator(HashRecords.begin()); }
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GSIHashIterator end() const { return GSIHashIterator(HashRecords.end()); }
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};
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class GlobalsStream {
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public:
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explicit GlobalsStream(std::unique_ptr<msf::MappedBlockStream> Stream);
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~GlobalsStream();
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const GSIHashTable &getGlobalsTable() const { return GlobalsTable; }
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Error reload();
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std::vector<std::pair<uint32_t, codeview::CVSymbol>>
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findRecordsByName(StringRef Name, const SymbolStream &Symbols) const;
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private:
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GSIHashTable GlobalsTable;
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std::unique_ptr<msf::MappedBlockStream> Stream;
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};
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}
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}
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#endif
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