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 22 SymbolSerializer::SymbolSerializer(BumpPtrAllocator &Allocator, 23 CodeViewContainer Container) 24 : Storage(Allocator), RecordBuffer(MaxRecordLength), 25 Stream(RecordBuffer, support::little), Writer(Stream), 26 Mapping(Writer, Container) {} 27 28 Error SymbolSerializer::visitSymbolBegin(CVSymbol &Record) { 29 assert(!CurrentSymbol.hasValue() && "Already in a symbol mapping!"); 30 31 Writer.setOffset(0); 32 33 if (auto EC = writeRecordPrefix(Record.kind())) 34 return EC; 35 36 CurrentSymbol = Record.kind(); 37 if (auto EC = Mapping.visitSymbolBegin(Record)) 38 return EC; 39 40 return Error::success(); 41 } 42 43 Error SymbolSerializer::visitSymbolEnd(CVSymbol &Record) { 44 assert(CurrentSymbol.hasValue() && "Not in a symbol mapping!"); 45 46 if (auto EC = Mapping.visitSymbolEnd(Record)) 47 return EC; 48 49 uint32_t RecordEnd = Writer.getOffset(); 50 uint16_t Length = RecordEnd - 2; 51 Writer.setOffset(0); 52 if (auto EC = Writer.writeInteger(Length)) 53 return EC; 54 55 uint8_t *StableStorage = Storage.Allocate<uint8_t>(RecordEnd); 56 ::memcpy(StableStorage, &RecordBuffer[0], RecordEnd); 57 Record.RecordData = ArrayRef<uint8_t>(StableStorage, RecordEnd); 58 CurrentSymbol.reset(); 59 60 return Error::success(); 61 } 62