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 
initialize(BinaryStreamReader Reader)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 
initialize(BinaryStreamRef Section)33 Error DebugFrameDataSubsectionRef::initialize(BinaryStreamRef Section) {
34   BinaryStreamReader Reader(Section);
35   return initialize(Reader);
36 }
37 
calculateSerializedSize() const38 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 
commit(BinaryStreamWriter & Writer) const45 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 
addFrameData(const FrameData & Frame)60 void DebugFrameDataSubsection::addFrameData(const FrameData &Frame) {
61   Frames.push_back(Frame);
62 }
63