1 #include "llvm/DebugInfo/CodeView/SimpleTypeSerializer.h"
2
3 using namespace llvm;
4 using namespace llvm::codeview;
5
addPadding(BinaryStreamWriter & Writer)6 static void addPadding(BinaryStreamWriter &Writer) {
7 uint32_t Align = Writer.getOffset() % 4;
8 if (Align == 0)
9 return;
10
11 int PaddingBytes = 4 - Align;
12 while (PaddingBytes > 0) {
13 uint8_t Pad = static_cast<uint8_t>(LF_PAD0 + PaddingBytes);
14 cantFail(Writer.writeInteger(Pad));
15 --PaddingBytes;
16 }
17 }
18
SimpleTypeSerializer()19 SimpleTypeSerializer::SimpleTypeSerializer() : ScratchBuffer(MaxRecordLength) {}
20
~SimpleTypeSerializer()21 SimpleTypeSerializer::~SimpleTypeSerializer() {}
22
23 template <typename T>
serialize(T & Record)24 ArrayRef<uint8_t> SimpleTypeSerializer::serialize(T &Record) {
25 BinaryStreamWriter Writer(ScratchBuffer, support::little);
26 TypeRecordMapping Mapping(Writer);
27
28 // Write the record prefix first with a dummy length but real kind.
29 RecordPrefix DummyPrefix(uint16_t(Record.getKind()));
30 cantFail(Writer.writeObject(DummyPrefix));
31
32 RecordPrefix *Prefix = reinterpret_cast<RecordPrefix *>(ScratchBuffer.data());
33 CVType CVT(Prefix, sizeof(RecordPrefix));
34
35 cantFail(Mapping.visitTypeBegin(CVT));
36 cantFail(Mapping.visitKnownRecord(CVT, Record));
37 cantFail(Mapping.visitTypeEnd(CVT));
38
39 addPadding(Writer);
40
41 // Update the size and kind after serialization.
42 Prefix->RecordKind = CVT.kind();
43 Prefix->RecordLen = Writer.getOffset() - sizeof(uint16_t);
44
45 return {ScratchBuffer.data(), Writer.getOffset()};
46 }
47
48 // Explicitly instantiate the member function for each known type so that we can
49 // implement this in the cpp file.
50 #define TYPE_RECORD(EnumName, EnumVal, Name) \
51 template ArrayRef<uint8_t> llvm::codeview::SimpleTypeSerializer::serialize( \
52 Name##Record &Record);
53 #define TYPE_RECORD_ALIAS(EnumName, EnumVal, Name, AliasName)
54 #define MEMBER_RECORD(EnumName, EnumVal, Name)
55 #define MEMBER_RECORD_ALIAS(EnumName, EnumVal, Name, AliasName)
56 #include "llvm/DebugInfo/CodeView/CodeViewTypes.def"
57