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4a753bdddf
The PDB "symbol stream" actually contains symbol records for the publics and the globals stream. The globals and publics streams are essentially hash tables that point into a single stream of records. In order to match cvdump's behavior, we need to only dump symbol records referenced from the hash table. This patch implements that, and then implements global stream dumping, since it's just a subset of public stream dumping. Now we shouldn't see S_PROCREF or S_GDATA32 records when dumping publics, and instead we should see those record in the globals stream. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@309066 91177308-0d34-0410-b5e6-96231b3b80d8
103 lines
3.1 KiB
C++
103 lines
3.1 KiB
C++
//===- RecordIterator.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 LLVM_DEBUGINFO_CODEVIEW_RECORDITERATOR_H
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#define LLVM_DEBUGINFO_CODEVIEW_RECORDITERATOR_H
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#include "llvm/ADT/ArrayRef.h"
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#include "llvm/ADT/Optional.h"
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#include "llvm/DebugInfo/CodeView/CodeViewError.h"
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#include "llvm/DebugInfo/CodeView/RecordSerialization.h"
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#include "llvm/DebugInfo/CodeView/TypeIndex.h"
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#include "llvm/Support/BinaryStreamReader.h"
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#include "llvm/Support/BinaryStreamRef.h"
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#include "llvm/Support/Endian.h"
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#include "llvm/Support/Error.h"
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#include <cstdint>
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namespace llvm {
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namespace codeview {
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template <typename Kind> class CVRecord {
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public:
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CVRecord() : Type(static_cast<Kind>(0)) {}
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CVRecord(Kind K, ArrayRef<uint8_t> Data) : Type(K), RecordData(Data) {}
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bool valid() const { return Type != static_cast<Kind>(0); }
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uint32_t length() const { return RecordData.size(); }
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Kind kind() const { return Type; }
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ArrayRef<uint8_t> data() const { return RecordData; }
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StringRef str_data() const {
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return StringRef(reinterpret_cast<const char *>(RecordData.data()),
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RecordData.size());
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}
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ArrayRef<uint8_t> content() const {
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return RecordData.drop_front(sizeof(RecordPrefix));
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}
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Optional<uint32_t> hash() const { return Hash; }
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void setHash(uint32_t Value) { Hash = Value; }
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Kind Type;
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ArrayRef<uint8_t> RecordData;
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Optional<uint32_t> Hash;
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};
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template <typename Kind> struct RemappedRecord {
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explicit RemappedRecord(const CVRecord<Kind> &R) : OriginalRecord(R) {}
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CVRecord<Kind> OriginalRecord;
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SmallVector<std::pair<uint32_t, TypeIndex>, 8> Mappings;
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};
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/// Read a complete record from a stream at a random offset.
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template <typename Kind>
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inline Expected<CVRecord<Kind>> readCVRecordFromStream(BinaryStreamRef Stream,
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uint32_t Offset) {
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const RecordPrefix *Prefix = nullptr;
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BinaryStreamReader Reader(Stream);
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Reader.setOffset(Offset);
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if (auto EC = Reader.readObject(Prefix))
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return std::move(EC);
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if (Prefix->RecordLen < 2)
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return make_error<CodeViewError>(cv_error_code::corrupt_record);
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Kind K = static_cast<Kind>(uint16_t(Prefix->RecordKind));
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Reader.setOffset(Offset);
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ArrayRef<uint8_t> RawData;
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if (auto EC = Reader.readBytes(RawData, Prefix->RecordLen + sizeof(uint16_t)))
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return std::move(EC);
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return codeview::CVRecord<Kind>(K, RawData);
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}
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} // end namespace codeview
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template <typename Kind>
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struct VarStreamArrayExtractor<codeview::CVRecord<Kind>> {
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Error operator()(BinaryStreamRef Stream, uint32_t &Len,
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codeview::CVRecord<Kind> &Item) {
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auto ExpectedRec = codeview::readCVRecordFromStream<Kind>(Stream, 0);
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if (!ExpectedRec)
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return ExpectedRec.takeError();
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Item = *ExpectedRec;
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Len = ExpectedRec->length();
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return Error::success();
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}
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};
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} // end namespace llvm
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#endif // LLVM_DEBUGINFO_CODEVIEW_RECORDITERATOR_H
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