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Differential D70259 Diff 230140 llvm/lib/DebugInfo/CodeView/SimpleTypeSerializer.cpp

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llvm/lib/DebugInfo/CodeView/SimpleTypeSerializer.cpp

#include "llvm/DebugInfo/CodeView/SimpleTypeSerializer.h" #include "llvm/DebugInfo/CodeView/SimpleTypeSerializer.h"
using namespace llvm; using namespace llvm;
using namespace llvm::codeview; using namespace llvm::codeview;
static void addPadding(BinaryStreamWriter &Writer) { static void addPadding(BinaryStreamWriter &Writer) {
uint32_t Align = Writer.getOffset() % 4; uint32_t Align = Writer.getOffset() % 4;
if (Align == 0) if (Align == 0)
return; return;
int PaddingBytes = 4 - Align; int PaddingBytes = 4 - Align;
while (PaddingBytes > 0) { while (PaddingBytes > 0) {
uint8_t Pad = static_cast<uint8_t>(LF_PAD0 + PaddingBytes); uint8_t Pad = static_cast<uint8_t>(LF_PAD0 + PaddingBytes);
cantFail(Writer.writeInteger(Pad)); llvm_cantFail(Writer.writeInteger(Pad));
--PaddingBytes; --PaddingBytes;
} }
} }
SimpleTypeSerializer::SimpleTypeSerializer() : ScratchBuffer(MaxRecordLength) {} SimpleTypeSerializer::SimpleTypeSerializer() : ScratchBuffer(MaxRecordLength) {}
SimpleTypeSerializer::~SimpleTypeSerializer() {} SimpleTypeSerializer::~SimpleTypeSerializer() {}
template <typename T> template <typename T>
ArrayRef<uint8_t> SimpleTypeSerializer::serialize(T &Record) { ArrayRef<uint8_t> SimpleTypeSerializer::serialize(T &Record) {
BinaryStreamWriter Writer(ScratchBuffer, support::little); BinaryStreamWriter Writer(ScratchBuffer, support::little);
TypeRecordMapping Mapping(Writer); TypeRecordMapping Mapping(Writer);
// Write the record prefix first with a dummy length but real kind. // Write the record prefix first with a dummy length but real kind.
RecordPrefix DummyPrefix(uint16_t(Record.getKind())); RecordPrefix DummyPrefix(uint16_t(Record.getKind()));
cantFail(Writer.writeObject(DummyPrefix)); llvm_cantFail(Writer.writeObject(DummyPrefix));
RecordPrefix *Prefix = reinterpret_cast<RecordPrefix *>(ScratchBuffer.data()); RecordPrefix *Prefix = reinterpret_cast<RecordPrefix *>(ScratchBuffer.data());
CVType CVT(Prefix, sizeof(RecordPrefix)); CVType CVT(Prefix, sizeof(RecordPrefix));
cantFail(Mapping.visitTypeBegin(CVT)); llvm_cantFail(Mapping.visitTypeBegin(CVT));
cantFail(Mapping.visitKnownRecord(CVT, Record)); llvm_cantFail(Mapping.visitKnownRecord(CVT, Record));
cantFail(Mapping.visitTypeEnd(CVT)); llvm_cantFail(Mapping.visitTypeEnd(CVT));
addPadding(Writer); addPadding(Writer);
// Update the size and kind after serialization. // Update the size and kind after serialization.
Prefix->RecordKind = CVT.kind(); Prefix->RecordKind = CVT.kind();
Prefix->RecordLen = Writer.getOffset() - sizeof(uint16_t); Prefix->RecordLen = Writer.getOffset() - sizeof(uint16_t);
return {ScratchBuffer.data(), Writer.getOffset()}; return {ScratchBuffer.data(), Writer.getOffset()};
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