1 //===- SymbolSerializer.cpp -----------------------------------------------===//
2 //
3 // The LLVM Compiler Infrastructure
4 //
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
7 //
8 //===----------------------------------------------------------------------===//
9
10 #include "llvm/DebugInfo/CodeView/SymbolSerializer.h"
11 #include "llvm/ADT/ArrayRef.h"
12 #include "llvm/DebugInfo/CodeView/SymbolRecord.h"
13 #include "llvm/Support/Endian.h"
14 #include "llvm/Support/Error.h"
15 #include <cassert>
16 #include <cstdint>
17 #include <cstring>
18
19 using namespace llvm;
20 using namespace llvm::codeview;
21
SymbolSerializer(BumpPtrAllocator & Allocator,CodeViewContainer Container)22 SymbolSerializer::SymbolSerializer(BumpPtrAllocator &Allocator,
23 CodeViewContainer Container)
24 : Storage(Allocator), Stream(RecordBuffer, support::little), Writer(Stream),
25 Mapping(Writer, Container) {}
26
visitSymbolBegin(CVSymbol & Record)27 Error SymbolSerializer::visitSymbolBegin(CVSymbol &Record) {
28 assert(!CurrentSymbol.hasValue() && "Already in a symbol mapping!");
29
30 Writer.setOffset(0);
31
32 if (auto EC = writeRecordPrefix(Record.kind()))
33 return EC;
34
35 CurrentSymbol = Record.kind();
36 if (auto EC = Mapping.visitSymbolBegin(Record))
37 return EC;
38
39 return Error::success();
40 }
41
visitSymbolEnd(CVSymbol & Record)42 Error SymbolSerializer::visitSymbolEnd(CVSymbol &Record) {
43 assert(CurrentSymbol.hasValue() && "Not in a symbol mapping!");
44
45 if (auto EC = Mapping.visitSymbolEnd(Record))
46 return EC;
47
48 uint32_t RecordEnd = Writer.getOffset();
49 uint16_t Length = RecordEnd - 2;
50 Writer.setOffset(0);
51 if (auto EC = Writer.writeInteger(Length))
52 return EC;
53
54 uint8_t *StableStorage = Storage.Allocate<uint8_t>(RecordEnd);
55 ::memcpy(StableStorage, &RecordBuffer[0], RecordEnd);
56 Record.RecordData = ArrayRef<uint8_t>(StableStorage, RecordEnd);
57 CurrentSymbol.reset();
58
59 return Error::success();
60 }
61