1//===- SymbolSerializer.cpp -----------------------------------------------===//
2//
3// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4// See https://llvm.org/LICENSE.txt for license information.
5// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6//
7//===----------------------------------------------------------------------===//
8
9#include "llvm/DebugInfo/CodeView/SymbolSerializer.h"
10#include "llvm/ADT/ArrayRef.h"
11#include "llvm/Support/Error.h"
12#include <cassert>
13#include <cstdint>
14#include <cstring>
15
16using namespace llvm;
17using namespace llvm::codeview;
18
19SymbolSerializer::SymbolSerializer(BumpPtrAllocator &Allocator,
20 CodeViewContainer Container)
21 : Storage(Allocator), Stream(RecordBuffer, llvm::endianness::little),
22 Writer(Stream), Mapping(Writer, Container) {}
23
24Error SymbolSerializer::visitSymbolBegin(CVSymbol &Record) {
25 assert(!CurrentSymbol && "Already in a symbol mapping!");
26
27 Writer.setOffset(0);
28
29 if (auto EC = writeRecordPrefix(Kind: Record.kind()))
30 return EC;
31
32 CurrentSymbol = Record.kind();
33 if (auto EC = Mapping.visitSymbolBegin(Record))
34 return EC;
35
36 return Error::success();
37}
38
39Error SymbolSerializer::visitSymbolEnd(CVSymbol &Record) {
40 assert(CurrentSymbol && "Not in a symbol mapping!");
41
42 if (auto EC = Mapping.visitSymbolEnd(Record))
43 return EC;
44
45 uint32_t RecordEnd = Writer.getOffset();
46 uint16_t Length = RecordEnd - 2;
47 Writer.setOffset(0);
48 if (auto EC = Writer.writeInteger(Value: Length))
49 return EC;
50
51 uint8_t *StableStorage = Storage.Allocate<uint8_t>(Num: RecordEnd);
52 ::memcpy(dest: StableStorage, src: &RecordBuffer[0], n: RecordEnd);
53 Record.RecordData = ArrayRef<uint8_t>(StableStorage, RecordEnd);
54 CurrentSymbol.reset();
55
56 return Error::success();
57}
58