lib/DebugInfo/CodeView/DebugFrameDataSubsection.cpp

   1 //===- DebugFrameDataSubsection.cpp -----------------------------*- C++ -*-===//
   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/DebugFrameDataSubsection.h"
  11 #include "llvm/DebugInfo/CodeView/CodeViewError.h"
  12
  13 using namespace llvm;
  14 using namespace llvm::codeview;
  15
  16 Error DebugFrameDataSubsectionRef::initialize(BinaryStreamReader Reader) {
  17   if (Reader.bytesRemaining() % sizeof(FrameData) != 0) {
  18     if (auto EC = Reader.readObject(RelocPtr))
  19       return EC;
  20   }
  21
  22   if (Reader.bytesRemaining() % sizeof(FrameData) != 0)
  23     return make_error<CodeViewError>(cv_error_code::corrupt_record,
  24                                      "Invalid frame data record format!");
  25
  26   uint32_t Count = Reader.bytesRemaining() / sizeof(FrameData);
  27   if (auto EC = Reader.readArray(Frames, Count))
  28     return EC;
  29   return Error::success();
  30 }
  31
  32 Error DebugFrameDataSubsectionRef::initialize(BinaryStreamRef Section) {
  33   BinaryStreamReader Reader(Section);
  34   return initialize(Reader);
  35 }
  36
  37 uint32_t DebugFrameDataSubsection::calculateSerializedSize() const {
  38   uint32_t Size = sizeof(FrameData) * Frames.size();
  39   if (IncludeRelocPtr)
  40     Size += sizeof(uint32_t);
  41   return Size;
  42 }
  43
  44 Error DebugFrameDataSubsection::commit(BinaryStreamWriter &Writer) const {
  45   if (IncludeRelocPtr) {
  46     if (auto EC = Writer.writeInteger<uint32_t>(0))
  47       return EC;
  48   }
  49
  50   std::vector<FrameData> SortedFrames(Frames.begin(), Frames.end());
  51   std::sort(SortedFrames.begin(), SortedFrames.end(),
  52             [](const FrameData &LHS, const FrameData &RHS) {
  53               return LHS.RvaStart < RHS.RvaStart;
  54             });
  55   if (auto EC = Writer.writeArray(makeArrayRef(SortedFrames)))
  56     return EC;
  57   return Error::success();
  58 }
  59
  60 void DebugFrameDataSubsection::addFrameData(const FrameData &Frame) {
  61   Frames.push_back(Frame);
  62 }