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 "llvm/Support/ErrorHandling.h" 13 #include <cassert> 14 #include <cstdint> 15 #include <cstring> 16 17 using namespace llvm; 18 using namespace llvm::codeview; 19 20 SymbolSerializer::SymbolSerializer(BumpPtrAllocator &Allocator, 21 CodeViewContainer Container) 22 : Storage(Allocator), Stream(RecordBuffer, llvm::endianness::little), 23 Writer(Stream), Mapping(Writer, Container) {} 24 25 Error SymbolSerializer::visitSymbolBegin(CVSymbol &Record) { 26 assert(!CurrentSymbol && "Already in a symbol mapping!"); 27 28 Writer.setOffset(0); 29 30 if (auto EC = writeRecordPrefix(Record.kind())) 31 return EC; 32 33 CurrentSymbol = Record.kind(); 34 if (auto EC = Mapping.visitSymbolBegin(Record)) 35 return EC; 36 37 return Error::success(); 38 } 39 40 Error SymbolSerializer::visitSymbolEnd(CVSymbol &Record) { 41 assert(CurrentSymbol && "Not in a symbol mapping!"); 42 43 if (auto EC = Mapping.visitSymbolEnd(Record)) 44 return EC; 45 46 uint32_t RecordEnd = Writer.getOffset(); 47 uint16_t Length = RecordEnd - 2; 48 Writer.setOffset(0); 49 if (auto EC = Writer.writeInteger(Length)) 50 return EC; 51 52 uint8_t *StableStorage = Storage.Allocate<uint8_t>(RecordEnd); 53 ::memcpy(StableStorage, &RecordBuffer[0], RecordEnd); 54 Record.RecordData = ArrayRef<uint8_t>(StableStorage, RecordEnd); 55 CurrentSymbol.reset(); 56 57 return Error::success(); 58 } 59