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//===- ModuleDebugFileChecksumFragment.cpp ----------------------*- C++ -*-===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
#include "llvm/DebugInfo/CodeView/ModuleDebugFileChecksumFragment.h"
#include "llvm/DebugInfo/CodeView/CodeViewError.h"
#include "llvm/Support/BinaryStreamReader.h"
using namespace llvm;
using namespace llvm::codeview;
struct FileChecksumEntryHeader {
using ulittle32_t = support::ulittle32_t;
ulittle32_t FileNameOffset; // Byte offset of filename in global string table.
uint8_t ChecksumSize; // Number of bytes of checksum.
uint8_t ChecksumKind; // FileChecksumKind
// Checksum bytes follow.
};
Error llvm::VarStreamArrayExtractor<FileChecksumEntry>::extract(
BinaryStreamRef Stream, uint32_t &Len, FileChecksumEntry &Item, void *Ctx) {
BinaryStreamReader Reader(Stream);
const FileChecksumEntryHeader *Header;
if (auto EC = Reader.readObject(Header))
return EC;
Item.FileNameOffset = Header->FileNameOffset;
Item.Kind = static_cast<FileChecksumKind>(Header->ChecksumKind);
if (auto EC = Reader.readBytes(Item.Checksum, Header->ChecksumSize))
return EC;
Len = alignTo(Header->ChecksumSize + sizeof(FileChecksumEntryHeader), 4);
return Error::success();
}
Error ModuleDebugFileChecksumFragmentRef::initialize(
BinaryStreamReader Reader) {
if (auto EC = Reader.readArray(Checksums, Reader.bytesRemaining()))
return EC;
return Error::success();
}
ModuleDebugFileChecksumFragment::ModuleDebugFileChecksumFragment()
: ModuleDebugFragment(ModuleDebugFragmentKind::FileChecksums) {}
void ModuleDebugFileChecksumFragment::addChecksum(uint32_t StringTableOffset,
FileChecksumKind Kind,
ArrayRef<uint8_t> Bytes) {
FileChecksumEntry Entry;
if (!Bytes.empty()) {
uint8_t *Copy = Storage.Allocate<uint8_t>(Bytes.size());
::memcpy(Copy, Bytes.data(), Bytes.size());
Entry.Checksum = makeArrayRef(Copy, Bytes.size());
}
Entry.FileNameOffset = StringTableOffset;
Entry.Kind = Kind;
Checksums.push_back(Entry);
// This maps the offset of this string in the string table to the offset
// of this checksum entry in the checksum buffer.
OffsetMap[StringTableOffset] = SerializedSize;
assert(SerializedSize % 4 == 0);
uint32_t Len = alignTo(sizeof(FileChecksumEntryHeader) + Bytes.size(), 4);
SerializedSize += Len;
}
uint32_t ModuleDebugFileChecksumFragment::calculateSerializedLength() {
return SerializedSize;
}
Error ModuleDebugFileChecksumFragment::commit(BinaryStreamWriter &Writer) {
for (const auto &FC : Checksums) {
FileChecksumEntryHeader Header;
Header.ChecksumKind = uint8_t(FC.Kind);
Header.ChecksumSize = FC.Checksum.size();
Header.FileNameOffset = FC.FileNameOffset;
if (auto EC = Writer.writeObject(Header))
return EC;
if (auto EC = Writer.writeArray(makeArrayRef(FC.Checksum)))
return EC;
if (auto EC = Writer.padToAlignment(4))
return EC;
}
return Error::success();
}
uint32_t ModuleDebugFileChecksumFragment::mapChecksumOffset(
uint32_t StringTableOffset) const {
auto Iter = OffsetMap.find(StringTableOffset);
assert(Iter != OffsetMap.end());
return Iter->second;
}
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