lib/DebugInfo/CodeView/DebugFrameDataSubsection.cpp

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