1 #include "llvm/DebugInfo/CodeView/SimpleTypeSerializer.h"
2
3 using namespace llvm;
4 using namespace llvm::codeview;
5
writeRecordPrefix(BinaryStreamWriter & Writer,TypeLeafKind Kind)6 static void writeRecordPrefix(BinaryStreamWriter &Writer, TypeLeafKind Kind) {
7 RecordPrefix Prefix;
8 Prefix.RecordKind = Kind;
9 Prefix.RecordLen = 0;
10 cantFail(Writer.writeObject(Prefix));
11 }
12
addPadding(BinaryStreamWriter & Writer)13 static void addPadding(BinaryStreamWriter &Writer) {
14 uint32_t Align = Writer.getOffset() % 4;
15 if (Align == 0)
16 return;
17
18 int PaddingBytes = 4 - Align;
19 while (PaddingBytes > 0) {
20 uint8_t Pad = static_cast<uint8_t>(LF_PAD0 + PaddingBytes);
21 cantFail(Writer.writeInteger(Pad));
22 --PaddingBytes;
23 }
24 }
25
SimpleTypeSerializer()26 SimpleTypeSerializer::SimpleTypeSerializer() : ScratchBuffer(MaxRecordLength) {}
27
~SimpleTypeSerializer()28 SimpleTypeSerializer::~SimpleTypeSerializer() {}
29
30 template <typename T>
serialize(T & Record)31 ArrayRef<uint8_t> SimpleTypeSerializer::serialize(T &Record) {
32 BinaryStreamWriter Writer(ScratchBuffer, support::little);
33 TypeRecordMapping Mapping(Writer);
34
35 CVType CVT;
36 CVT.Type = static_cast<TypeLeafKind>(Record.getKind());
37
38 writeRecordPrefix(Writer, CVT.Type);
39
40 cantFail(Mapping.visitTypeBegin(CVT));
41 cantFail(Mapping.visitKnownRecord(CVT, Record));
42 cantFail(Mapping.visitTypeEnd(CVT));
43
44 addPadding(Writer);
45
46 RecordPrefix *Prefix = reinterpret_cast<RecordPrefix *>(ScratchBuffer.data());
47
48 Prefix->RecordKind = CVT.kind();
49 Prefix->RecordLen = Writer.getOffset() - sizeof(uint16_t);
50
51 return {ScratchBuffer.data(), Writer.getOffset()};
52 }
53
54 // Explicitly instantiate the member function for each known type so that we can
55 // implement this in the cpp file.
56 #define TYPE_RECORD(EnumName, EnumVal, Name) \
57 template ArrayRef<uint8_t> llvm::codeview::SimpleTypeSerializer::serialize( \
58 Name##Record &Record);
59 #define TYPE_RECORD_ALIAS(EnumName, EnumVal, Name, AliasName)
60 #define MEMBER_RECORD(EnumName, EnumVal, Name)
61 #define MEMBER_RECORD_ALIAS(EnumName, EnumVal, Name, AliasName)
62 #include "llvm/DebugInfo/CodeView/CodeViewTypes.def"
63