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), Stream(RecordBuffer, support::little), Writer(Stream), 25 Mapping(Writer, Container) {} 26 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 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