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