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annotate lib/DebugInfo/DWARF/DWARFDebugMacro.cpp @ 100:7d135dc70f03 LLVM 3.9

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LLVM 3.9
author Miyagi Mitsuki <e135756@ie.u-ryukyu.ac.jp>
date Tue, 26 Jan 2016 22:53:40 +0900
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children 1172e4bd9c6f
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100
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1 //===-- DWARFDebugMacro.cpp -----------------------------------------------===//
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2 //
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3 // The LLVM Compiler Infrastructure
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4 //
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5 // This file is distributed under the University of Illinois Open Source
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6 // License. See LICENSE.TXT for details.
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7 //
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8 //===----------------------------------------------------------------------===//
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9
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10 #include "SyntaxHighlighting.h"
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11 #include "llvm/DebugInfo/DWARF/DWARFDebugMacro.h"
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12 #include "llvm/Support/Compiler.h"
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13 #include "llvm/Support/Dwarf.h"
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14 #include "llvm/Support/Format.h"
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15 #include "llvm/Support/raw_ostream.h"
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16
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17 using namespace llvm;
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18 using namespace dwarf;
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19 using namespace syntax;
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20
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21 void DWARFDebugMacro::dump(raw_ostream &OS) const {
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22 unsigned IndLevel = 0;
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23 for (const Entry &E : Macros) {
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24 // There should not be DW_MACINFO_end_file when IndLevel is Zero. However,
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25 // this check handles the case of corrupted ".debug_macinfo" section.
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26 if (IndLevel > 0)
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27 IndLevel -= (E.Type == DW_MACINFO_end_file);
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28 // Print indentation.
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29 for (unsigned I = 0; I < IndLevel; I++)
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30 OS << " ";
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31 IndLevel += (E.Type == DW_MACINFO_start_file);
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32
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33 WithColor(OS, syntax::Macro).get() << MacinfoString(E.Type);
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34 switch (E.Type) {
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35 default:
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36 // Got a corrupted ".debug_macinfo" section (invalid macinfo type).
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37 break;
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38 case DW_MACINFO_define:
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39 case DW_MACINFO_undef:
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40 OS << " - lineno: " << E.Line;
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41 OS << " macro: " << E.MacroStr;
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42 break;
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43 case DW_MACINFO_start_file:
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44 OS << " - lineno: " << E.Line;
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45 OS << " filenum: " << E.File;
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46 break;
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47 case DW_MACINFO_end_file:
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48 break;
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49 case DW_MACINFO_vendor_ext:
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50 OS << " - constant: " << E.ExtConstant;
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51 OS << " string: " << E.ExtStr;
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52 break;
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53 }
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54 OS << "\n";
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55 }
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56 }
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57
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58 void DWARFDebugMacro::parse(DataExtractor data) {
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59 uint32_t Offset = 0;
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60 while (data.isValidOffset(Offset)) {
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61 // A macro list entry consists of:
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62 Entry E;
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63 // 1. Macinfo type
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64 E.Type = data.getULEB128(&Offset);
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65
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66 if (E.Type == 0) {
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67 // Reached end of ".debug_macinfo" section.
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68 return;
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69 }
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70
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71 switch (E.Type) {
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72 default:
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73 // Got a corrupted ".debug_macinfo" section (invalid macinfo type).
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74 // Push the corrupted entry to the list and halt parsing.
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75 E.Type = DW_MACINFO_invalid;
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76 Macros.push_back(E);
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77 return;
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78 case DW_MACINFO_define:
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79 case DW_MACINFO_undef:
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80 // 2. Source line
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81 E.Line = data.getULEB128(&Offset);
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82 // 3. Macro string
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83 E.MacroStr = data.getCStr(&Offset);
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84 break;
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85 case DW_MACINFO_start_file:
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86 // 2. Source line
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87 E.Line = data.getULEB128(&Offset);
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88 // 3. Source file id
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89 E.File = data.getULEB128(&Offset);
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90 break;
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91 case DW_MACINFO_end_file:
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92 break;
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93 case DW_MACINFO_vendor_ext:
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94 // 2. Vendor extension constant
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95 E.ExtConstant = data.getULEB128(&Offset);
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96 // 3. Vendor extension string
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97 E.ExtStr = data.getCStr(&Offset);
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98 break;
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99 }
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100
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101 Macros.push_back(E);
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102 }
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103 }