LCOV - code coverage report
Current view: top level - include/llvm/DebugInfo/CodeView - DebugLinesSubsection.h (source / functions) Hit Total Coverage
Test: llvm-toolchain.info Lines: 8 8 100.0 %
Date: 2017-09-14 15:23:50 Functions: 3 6 50.0 %
Legend: Lines: hit not hit

          Line data    Source code
       1             : //===- DebugLinesSubsection.h -----------------------------------*- 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             : #ifndef LLVM_DEBUGINFO_CODEVIEW_DEBUGLINESSUBSECTION_H
      11             : #define LLVM_DEBUGINFO_CODEVIEW_DEBUGLINESSUBSECTION_H
      12             : 
      13             : #include "llvm/ADT/StringRef.h"
      14             : #include "llvm/DebugInfo/CodeView/CodeView.h"
      15             : #include "llvm/DebugInfo/CodeView/DebugSubsection.h"
      16             : #include "llvm/DebugInfo/CodeView/Line.h"
      17             : #include "llvm/Support/BinaryStreamArray.h"
      18             : #include "llvm/Support/BinaryStreamReader.h"
      19             : #include "llvm/Support/BinaryStreamRef.h"
      20             : #include "llvm/Support/Endian.h"
      21             : #include "llvm/Support/Error.h"
      22             : #include <cstdint>
      23             : #include <vector>
      24             : 
      25             : namespace llvm {
      26             : namespace codeview {
      27             : 
      28             : class DebugChecksumsSubsection;
      29             : class DebugStringTableSubsection;
      30             : 
      31             : // Corresponds to the `CV_DebugSLinesHeader_t` structure.
      32             : struct LineFragmentHeader {
      33             :   support::ulittle32_t RelocOffset;  // Code offset of line contribution.
      34             :   support::ulittle16_t RelocSegment; // Code segment of line contribution.
      35             :   support::ulittle16_t Flags;        // See LineFlags enumeration.
      36             :   support::ulittle32_t CodeSize;     // Code size of this line contribution.
      37             : };
      38             : 
      39             : // Corresponds to the `CV_DebugSLinesFileBlockHeader_t` structure.
      40             : struct LineBlockFragmentHeader {
      41             :   support::ulittle32_t NameIndex; // Offset of FileChecksum entry in File
      42             :                                   // checksums buffer.  The checksum entry then
      43             :                                   // contains another offset into the string
      44             :                                   // table of the actual name.
      45             :   support::ulittle32_t NumLines;  // Number of lines
      46             :   support::ulittle32_t BlockSize; // Code size of block, in bytes.
      47             :   // The following two variable length arrays appear immediately after the
      48             :   // header.  The structure definitions follow.
      49             :   // LineNumberEntry   Lines[NumLines];
      50             :   // ColumnNumberEntry Columns[NumLines];
      51             : };
      52             : 
      53             : // Corresponds to `CV_Line_t` structure
      54             : struct LineNumberEntry {
      55             :   support::ulittle32_t Offset; // Offset to start of code bytes for line number
      56             :   support::ulittle32_t Flags;  // Start:24, End:7, IsStatement:1
      57             : };
      58             : 
      59             : // Corresponds to `CV_Column_t` structure
      60             : struct ColumnNumberEntry {
      61             :   support::ulittle16_t StartColumn;
      62             :   support::ulittle16_t EndColumn;
      63             : };
      64             : 
      65        1584 : struct LineColumnEntry {
      66             :   support::ulittle32_t NameIndex;
      67             :   FixedStreamArray<LineNumberEntry> LineNumbers;
      68             :   FixedStreamArray<ColumnNumberEntry> Columns;
      69             : };
      70             : 
      71         137 : class LineColumnExtractor {
      72             : public:
      73             :   Error operator()(BinaryStreamRef Stream, uint32_t &Len,
      74             :                    LineColumnEntry &Item);
      75             : 
      76             :   const LineFragmentHeader *Header = nullptr;
      77             : };
      78             : 
      79         274 : class DebugLinesSubsectionRef final : public DebugSubsectionRef {
      80             :   friend class LineColumnExtractor;
      81             : 
      82             :   using LineInfoArray = VarStreamArray<LineColumnEntry, LineColumnExtractor>;
      83             :   using Iterator = LineInfoArray::Iterator;
      84             : 
      85             : public:
      86             :   DebugLinesSubsectionRef();
      87             : 
      88             :   static bool classof(const DebugSubsectionRef *S) {
      89             :     return S->kind() == DebugSubsectionKind::Lines;
      90             :   }
      91             : 
      92             :   Error initialize(BinaryStreamReader Reader);
      93             : 
      94         264 :   Iterator begin() const { return LinesAndColumns.begin(); }
      95         264 :   Iterator end() const { return LinesAndColumns.end(); }
      96             : 
      97             :   const LineFragmentHeader *header() const { return Header; }
      98             : 
      99             :   bool hasColumnInfo() const;
     100             : 
     101             : private:
     102             :   const LineFragmentHeader *Header = nullptr;
     103             :   LineInfoArray LinesAndColumns;
     104             : };
     105             : 
     106          29 : class DebugLinesSubsection final : public DebugSubsection {
     107          87 :   struct Block {
     108             :     Block(uint32_t ChecksumBufferOffset)
     109          87 :         : ChecksumBufferOffset(ChecksumBufferOffset) {}
     110             : 
     111             :     uint32_t ChecksumBufferOffset;
     112             :     std::vector<LineNumberEntry> Lines;
     113             :     std::vector<ColumnNumberEntry> Columns;
     114             :   };
     115             : 
     116             : public:
     117             :   DebugLinesSubsection(DebugChecksumsSubsection &Checksums,
     118             :                        DebugStringTableSubsection &Strings);
     119             : 
     120             :   static bool classof(const DebugSubsection *S) {
     121             :     return S->kind() == DebugSubsectionKind::Lines;
     122             :   }
     123             : 
     124             :   void createBlock(StringRef FileName);
     125             :   void addLineInfo(uint32_t Offset, const LineInfo &Line);
     126             :   void addLineAndColumnInfo(uint32_t Offset, const LineInfo &Line,
     127             :                             uint32_t ColStart, uint32_t ColEnd);
     128             : 
     129             :   uint32_t calculateSerializedSize() const override;
     130             :   Error commit(BinaryStreamWriter &Writer) const override;
     131             : 
     132             :   void setRelocationAddress(uint16_t Segment, uint32_t Offset);
     133             :   void setCodeSize(uint32_t Size);
     134             :   void setFlags(LineFlags Flags);
     135             : 
     136             :   bool hasColumnInfo() const;
     137             : 
     138             : private:
     139             :   DebugChecksumsSubsection &Checksums;
     140             :   uint32_t RelocOffset = 0;
     141             :   uint16_t RelocSegment = 0;
     142             :   uint32_t CodeSize = 0;
     143             :   LineFlags Flags = LF_None;
     144             :   std::vector<Block> Blocks;
     145             : };
     146             : 
     147             : } // end namespace codeview
     148             : } // end namespace llvm
     149             : 
     150             : #endif // LLVM_DEBUGINFO_CODEVIEW_DEBUGLINESSUBSECTION_H

Generated by: LCOV version 1.13