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/Endian.h" 12#include "llvm/Support/Error.h" 13#include "llvm/Support/ErrorHandling.h" 14#include <cassert> 15#include <cstdint> 16#include <cstring> 17 18using namespace llvm; 19using namespace llvm::codeview; 20 21SymbolSerializer::SymbolSerializer(BumpPtrAllocator &Allocator, 22 CodeViewContainer Container) 23 : Storage(Allocator), Stream(RecordBuffer, support::little), Writer(Stream), 24 Mapping(Writer, Container) {} 25 26Error SymbolSerializer::visitSymbolBegin(CVSymbol &Record) { 27 assert(!CurrentSymbol && "Already in a symbol mapping!"); 28 29 Writer.setOffset(0); 30 31 if (auto EC = writeRecordPrefix(Record.kind())) 32 return EC; 33 34 CurrentSymbol = Record.kind(); 35 if (auto EC = Mapping.visitSymbolBegin(Record)) 36 return EC; 37 38 return Error::success(); 39} 40 41Error SymbolSerializer::visitSymbolEnd(CVSymbol &Record) { 42 assert(CurrentSymbol && "Not in a symbol mapping!"); 43 44 if (auto EC = Mapping.visitSymbolEnd(Record)) 45 return EC; 46 47 uint32_t RecordEnd = Writer.getOffset(); 48 uint16_t Length = RecordEnd - 2; 49 Writer.setOffset(0); 50 if (auto EC = Writer.writeInteger(Length)) 51 return EC; 52 53 uint8_t *StableStorage = Storage.Allocate<uint8_t>(RecordEnd); 54 ::memcpy(StableStorage, &RecordBuffer[0], RecordEnd); 55 Record.RecordData = ArrayRef<uint8_t>(StableStorage, RecordEnd); 56 CurrentSymbol.reset(); 57 58 return Error::success(); 59} 60