Bill Wendling | 2f921f8 | 2009-05-15 09:23:25 +0000 | [diff] [blame] | 1 | //===-- llvm/CodeGen/DwarfDebug.cpp - Dwarf Debug Framework ---------------===// |
| 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 | // This file contains support for writing dwarf debug info into asm files. |
| 11 | // |
| 12 | //===----------------------------------------------------------------------===// |
Chris Lattner | b14490d | 2010-03-09 00:39:24 +0000 | [diff] [blame] | 13 | |
Bill Wendling | 2f921f8 | 2009-05-15 09:23:25 +0000 | [diff] [blame] | 14 | #include "DwarfDebug.h" |
David Blaikie | 37c5231 | 2014-10-04 15:49:50 +0000 | [diff] [blame] | 15 | #include "ByteStreamer.h" |
Eric Christopher | 4573198 | 2013-08-08 23:45:55 +0000 | [diff] [blame] | 16 | #include "DIEHash.h" |
Chandler Carruth | d990388 | 2015-01-14 11:23:27 +0000 | [diff] [blame] | 17 | #include "DwarfCompileUnit.h" |
| 18 | #include "DwarfExpression.h" |
David Blaikie | 2c86a72 | 2013-12-02 19:33:15 +0000 | [diff] [blame] | 19 | #include "DwarfUnit.h" |
Chandler Carruth | ed0881b | 2012-12-03 16:50:05 +0000 | [diff] [blame] | 20 | #include "llvm/ADT/STLExtras.h" |
| 21 | #include "llvm/ADT/Statistic.h" |
| 22 | #include "llvm/ADT/StringExtras.h" |
| 23 | #include "llvm/ADT/Triple.h" |
Frederic Riss | e541e0b | 2015-01-05 21:29:41 +0000 | [diff] [blame] | 24 | #include "llvm/CodeGen/DIE.h" |
David Greene | 829b3e8 | 2009-08-19 21:52:55 +0000 | [diff] [blame] | 25 | #include "llvm/CodeGen/MachineFunction.h" |
Bill Wendling | 2f921f8 | 2009-05-15 09:23:25 +0000 | [diff] [blame] | 26 | #include "llvm/CodeGen/MachineModuleInfo.h" |
Chandler Carruth | 9fb823b | 2013-01-02 11:36:10 +0000 | [diff] [blame] | 27 | #include "llvm/IR/Constants.h" |
Chandler Carruth | 12664a0 | 2014-03-06 00:22:06 +0000 | [diff] [blame] | 28 | #include "llvm/IR/DIBuilder.h" |
Chandler Carruth | 9fb823b | 2013-01-02 11:36:10 +0000 | [diff] [blame] | 29 | #include "llvm/IR/DataLayout.h" |
Chandler Carruth | 9a4c9e5 | 2014-03-06 00:46:21 +0000 | [diff] [blame] | 30 | #include "llvm/IR/DebugInfo.h" |
Chandler Carruth | 9fb823b | 2013-01-02 11:36:10 +0000 | [diff] [blame] | 31 | #include "llvm/IR/Instructions.h" |
| 32 | #include "llvm/IR/Module.h" |
Chandler Carruth | 4220e9c | 2014-03-04 11:17:44 +0000 | [diff] [blame] | 33 | #include "llvm/IR/ValueHandle.h" |
Chris Lattner | e13c372 | 2010-03-09 01:58:53 +0000 | [diff] [blame] | 34 | #include "llvm/MC/MCAsmInfo.h" |
Chris Lattner | 4d2c0f9 | 2009-07-31 18:48:30 +0000 | [diff] [blame] | 35 | #include "llvm/MC/MCSection.h" |
Chris Lattner | 4b7dadb | 2009-08-19 05:49:37 +0000 | [diff] [blame] | 36 | #include "llvm/MC/MCStreamer.h" |
Chris Lattner | e13c372 | 2010-03-09 01:58:53 +0000 | [diff] [blame] | 37 | #include "llvm/MC/MCSymbol.h" |
Devang Patel | 6c74a87 | 2010-04-27 19:46:33 +0000 | [diff] [blame] | 38 | #include "llvm/Support/CommandLine.h" |
Daniel Dunbar | cdf01b5 | 2009-10-13 06:47:08 +0000 | [diff] [blame] | 39 | #include "llvm/Support/Debug.h" |
David Majnemer | ed89b5c | 2013-08-21 06:13:34 +0000 | [diff] [blame] | 40 | #include "llvm/Support/Dwarf.h" |
Saleem Abdulrasool | 271ac58 | 2014-07-14 16:28:09 +0000 | [diff] [blame] | 41 | #include "llvm/Support/Endian.h" |
Daniel Dunbar | cdf01b5 | 2009-10-13 06:47:08 +0000 | [diff] [blame] | 42 | #include "llvm/Support/ErrorHandling.h" |
Chris Lattner | f5c834f | 2010-01-22 22:09:00 +0000 | [diff] [blame] | 43 | #include "llvm/Support/FormattedStream.h" |
Logan Chien | 5b776b7 | 2014-02-22 14:00:39 +0000 | [diff] [blame] | 44 | #include "llvm/Support/LEB128.h" |
Eric Christopher | 6764643 | 2013-07-26 17:02:41 +0000 | [diff] [blame] | 45 | #include "llvm/Support/MD5.h" |
Michael J. Spencer | 447762d | 2010-11-29 18:16:10 +0000 | [diff] [blame] | 46 | #include "llvm/Support/Path.h" |
Chandler Carruth | ed0881b | 2012-12-03 16:50:05 +0000 | [diff] [blame] | 47 | #include "llvm/Support/Timer.h" |
Chandler Carruth | ed0881b | 2012-12-03 16:50:05 +0000 | [diff] [blame] | 48 | #include "llvm/Target/TargetFrameLowering.h" |
| 49 | #include "llvm/Target/TargetLoweringObjectFile.h" |
| 50 | #include "llvm/Target/TargetMachine.h" |
| 51 | #include "llvm/Target/TargetOptions.h" |
| 52 | #include "llvm/Target/TargetRegisterInfo.h" |
Eric Christopher | d913448 | 2014-08-04 21:25:23 +0000 | [diff] [blame] | 53 | #include "llvm/Target/TargetSubtargetInfo.h" |
Bill Wendling | 2f921f8 | 2009-05-15 09:23:25 +0000 | [diff] [blame] | 54 | using namespace llvm; |
| 55 | |
Chandler Carruth | 1b9dde0 | 2014-04-22 02:02:50 +0000 | [diff] [blame] | 56 | #define DEBUG_TYPE "dwarfdebug" |
| 57 | |
Eric Christopher | 7f2b551 | 2013-07-23 22:16:41 +0000 | [diff] [blame] | 58 | static cl::opt<bool> |
| 59 | DisableDebugInfoPrinting("disable-debug-info-print", cl::Hidden, |
| 60 | cl::desc("Disable debug info printing")); |
Devang Patel | 6c74a87 | 2010-04-27 19:46:33 +0000 | [diff] [blame] | 61 | |
Eric Christopher | 7f2b551 | 2013-07-23 22:16:41 +0000 | [diff] [blame] | 62 | static cl::opt<bool> UnknownLocations( |
| 63 | "use-unknown-locations", cl::Hidden, |
| 64 | cl::desc("Make an absence of debug location information explicit."), |
| 65 | cl::init(false)); |
Dan Gohman | 7421ae4 | 2010-05-07 01:08:53 +0000 | [diff] [blame] | 66 | |
Eric Christopher | dd1a012 | 2013-09-13 00:35:05 +0000 | [diff] [blame] | 67 | static cl::opt<bool> |
| 68 | GenerateGnuPubSections("generate-gnu-dwarf-pub-sections", cl::Hidden, |
| 69 | cl::desc("Generate GNU-style pubnames and pubtypes"), |
| 70 | cl::init(false)); |
| 71 | |
Eric Christopher | 02dbadb | 2014-02-14 01:26:55 +0000 | [diff] [blame] | 72 | static cl::opt<bool> GenerateARangeSection("generate-arange-section", |
| 73 | cl::Hidden, |
| 74 | cl::desc("Generate dwarf aranges"), |
| 75 | cl::init(false)); |
| 76 | |
Eric Christopher | 20b76a7 | 2012-08-23 22:36:40 +0000 | [diff] [blame] | 77 | namespace { |
Eric Christopher | f07ee3a | 2014-01-27 23:50:03 +0000 | [diff] [blame] | 78 | enum DefaultOnOff { Default, Enable, Disable }; |
Eric Christopher | 20b76a7 | 2012-08-23 22:36:40 +0000 | [diff] [blame] | 79 | } |
Eric Christopher | 4996c70 | 2011-11-07 09:24:32 +0000 | [diff] [blame] | 80 | |
Eric Christopher | 7f2b551 | 2013-07-23 22:16:41 +0000 | [diff] [blame] | 81 | static cl::opt<DefaultOnOff> |
| 82 | DwarfAccelTables("dwarf-accel-tables", cl::Hidden, |
| 83 | cl::desc("Output prototype dwarf accelerator tables."), |
| 84 | cl::values(clEnumVal(Default, "Default for platform"), |
| 85 | clEnumVal(Enable, "Enabled"), |
| 86 | clEnumVal(Disable, "Disabled"), clEnumValEnd), |
| 87 | cl::init(Default)); |
Eric Christopher | 20b76a7 | 2012-08-23 22:36:40 +0000 | [diff] [blame] | 88 | |
Eric Christopher | 7f2b551 | 2013-07-23 22:16:41 +0000 | [diff] [blame] | 89 | static cl::opt<DefaultOnOff> |
Eric Christopher | 7f2b551 | 2013-07-23 22:16:41 +0000 | [diff] [blame] | 90 | SplitDwarf("split-dwarf", cl::Hidden, |
Eric Christopher | 5d008fe | 2013-12-04 23:24:28 +0000 | [diff] [blame] | 91 | cl::desc("Output DWARF5 split debug info."), |
Eric Christopher | 7f2b551 | 2013-07-23 22:16:41 +0000 | [diff] [blame] | 92 | cl::values(clEnumVal(Default, "Default for platform"), |
| 93 | clEnumVal(Enable, "Enabled"), |
| 94 | clEnumVal(Disable, "Disabled"), clEnumValEnd), |
| 95 | cl::init(Default)); |
Eric Christopher | 2942431 | 2012-11-12 22:22:20 +0000 | [diff] [blame] | 96 | |
Eric Christopher | 7da2488 | 2013-08-19 21:07:38 +0000 | [diff] [blame] | 97 | static cl::opt<DefaultOnOff> |
Eric Christopher | 4d36ca0 | 2013-08-26 23:24:35 +0000 | [diff] [blame] | 98 | DwarfPubSections("generate-dwarf-pub-sections", cl::Hidden, |
| 99 | cl::desc("Generate DWARF pubnames and pubtypes sections"), |
| 100 | cl::values(clEnumVal(Default, "Default for platform"), |
| 101 | clEnumVal(Enable, "Enabled"), |
| 102 | clEnumVal(Disable, "Disabled"), clEnumValEnd), |
| 103 | cl::init(Default)); |
Eric Christopher | 7da2488 | 2013-08-19 21:07:38 +0000 | [diff] [blame] | 104 | |
Benjamin Kramer | b12cf01 | 2013-08-24 12:54:27 +0000 | [diff] [blame] | 105 | static const char *const DWARFGroupName = "DWARF Emission"; |
| 106 | static const char *const DbgTimerName = "DWARF Debug Writer"; |
Bill Wendling | fcc1414 | 2010-04-07 09:28:04 +0000 | [diff] [blame] | 107 | |
Adrian Prantl | 92da14b | 2015-03-02 22:02:33 +0000 | [diff] [blame] | 108 | void DebugLocDwarfExpression::EmitOp(uint8_t Op, const char *Comment) { |
| 109 | BS.EmitInt8( |
| 110 | Op, Comment ? Twine(Comment) + " " + dwarf::OperationEncodingString(Op) |
| 111 | : dwarf::OperationEncodingString(Op)); |
| 112 | } |
| 113 | |
Adrian Prantl | 5123368 | 2015-03-10 19:23:37 +0000 | [diff] [blame] | 114 | void DebugLocDwarfExpression::EmitSigned(int64_t Value) { |
Adrian Prantl | 92da14b | 2015-03-02 22:02:33 +0000 | [diff] [blame] | 115 | BS.EmitSLEB128(Value, Twine(Value)); |
| 116 | } |
| 117 | |
Adrian Prantl | 5123368 | 2015-03-10 19:23:37 +0000 | [diff] [blame] | 118 | void DebugLocDwarfExpression::EmitUnsigned(uint64_t Value) { |
Adrian Prantl | 92da14b | 2015-03-02 22:02:33 +0000 | [diff] [blame] | 119 | BS.EmitULEB128(Value, Twine(Value)); |
| 120 | } |
| 121 | |
| 122 | bool DebugLocDwarfExpression::isFrameRegister(unsigned MachineReg) { |
| 123 | // This information is not available while emitting .debug_loc entries. |
| 124 | return false; |
| 125 | } |
| 126 | |
Bill Wendling | 2f921f8 | 2009-05-15 09:23:25 +0000 | [diff] [blame] | 127 | //===----------------------------------------------------------------------===// |
| 128 | |
Manman Ren | be5576f | 2013-10-08 19:07:44 +0000 | [diff] [blame] | 129 | /// resolve - Look in the DwarfDebug map for the MDNode that |
| 130 | /// corresponds to the reference. |
Eric Christopher | b4bef6d | 2013-11-19 09:04:36 +0000 | [diff] [blame] | 131 | template <typename T> T DbgVariable::resolve(DIRef<T> Ref) const { |
Manman Ren | be5576f | 2013-10-08 19:07:44 +0000 | [diff] [blame] | 132 | return DD->resolve(Ref); |
| 133 | } |
| 134 | |
Adrian Prantl | 1a1647c | 2014-03-18 02:34:58 +0000 | [diff] [blame] | 135 | bool DbgVariable::isBlockByrefVariable() const { |
| 136 | assert(Var.isVariable() && "Invalid complex DbgVariable!"); |
| 137 | return Var.isBlockByrefVariable(DD->getTypeIdentifierMap()); |
| 138 | } |
| 139 | |
Nick Lewycky | 019d255 | 2011-07-29 03:49:23 +0000 | [diff] [blame] | 140 | DIType DbgVariable::getType() const { |
Adrian Prantl | 1a1647c | 2014-03-18 02:34:58 +0000 | [diff] [blame] | 141 | DIType Ty = Var.getType().resolve(DD->getTypeIdentifierMap()); |
Devang Patel | f20c4f7 | 2011-04-12 22:53:02 +0000 | [diff] [blame] | 142 | // FIXME: isBlockByrefVariable should be reformulated in terms of complex |
| 143 | // addresses instead. |
Adrian Prantl | 1a1647c | 2014-03-18 02:34:58 +0000 | [diff] [blame] | 144 | if (Var.isBlockByrefVariable(DD->getTypeIdentifierMap())) { |
Devang Patel | f20c4f7 | 2011-04-12 22:53:02 +0000 | [diff] [blame] | 145 | /* Byref variables, in Blocks, are declared by the programmer as |
| 146 | "SomeType VarName;", but the compiler creates a |
| 147 | __Block_byref_x_VarName struct, and gives the variable VarName |
| 148 | either the struct, or a pointer to the struct, as its type. This |
| 149 | is necessary for various behind-the-scenes things the compiler |
| 150 | needs to do with by-reference variables in blocks. |
Eric Christopher | 6a84138 | 2012-11-19 22:42:10 +0000 | [diff] [blame] | 151 | |
Devang Patel | f20c4f7 | 2011-04-12 22:53:02 +0000 | [diff] [blame] | 152 | However, as far as the original *programmer* is concerned, the |
| 153 | variable should still have type 'SomeType', as originally declared. |
Eric Christopher | 6a84138 | 2012-11-19 22:42:10 +0000 | [diff] [blame] | 154 | |
Devang Patel | f20c4f7 | 2011-04-12 22:53:02 +0000 | [diff] [blame] | 155 | The following function dives into the __Block_byref_x_VarName |
| 156 | struct to find the original type of the variable. This will be |
| 157 | passed back to the code generating the type for the Debug |
| 158 | Information Entry for the variable 'VarName'. 'VarName' will then |
| 159 | have the original type 'SomeType' in its debug information. |
Eric Christopher | 6a84138 | 2012-11-19 22:42:10 +0000 | [diff] [blame] | 160 | |
Devang Patel | f20c4f7 | 2011-04-12 22:53:02 +0000 | [diff] [blame] | 161 | The original type 'SomeType' will be the type of the field named |
| 162 | 'VarName' inside the __Block_byref_x_VarName struct. |
Eric Christopher | 6a84138 | 2012-11-19 22:42:10 +0000 | [diff] [blame] | 163 | |
Devang Patel | f20c4f7 | 2011-04-12 22:53:02 +0000 | [diff] [blame] | 164 | NOTE: In order for this to not completely fail on the debugger |
| 165 | side, the Debug Information Entry for the variable VarName needs to |
| 166 | have a DW_AT_location that tells the debugger how to unwind through |
| 167 | the pointers and __Block_byref_x_VarName struct to find the actual |
| 168 | value of the variable. The function addBlockByrefType does this. */ |
| 169 | DIType subType = Ty; |
Eric Christopher | 31b0576 | 2013-08-08 01:41:00 +0000 | [diff] [blame] | 170 | uint16_t tag = Ty.getTag(); |
Eric Christopher | 6a84138 | 2012-11-19 22:42:10 +0000 | [diff] [blame] | 171 | |
Eric Christopher | 9adc55f | 2013-09-04 19:53:21 +0000 | [diff] [blame] | 172 | if (tag == dwarf::DW_TAG_pointer_type) |
Manman Ren | be5576f | 2013-10-08 19:07:44 +0000 | [diff] [blame] | 173 | subType = resolve(DIDerivedType(Ty).getTypeDerivedFrom()); |
Eric Christopher | 6a84138 | 2012-11-19 22:42:10 +0000 | [diff] [blame] | 174 | |
Manman Ren | ab8ffba | 2014-07-28 19:14:13 +0000 | [diff] [blame] | 175 | DIArray Elements = DICompositeType(subType).getElements(); |
Devang Patel | f20c4f7 | 2011-04-12 22:53:02 +0000 | [diff] [blame] | 176 | for (unsigned i = 0, N = Elements.getNumElements(); i < N; ++i) { |
David Blaikie | 5af2aca | 2013-11-18 23:57:26 +0000 | [diff] [blame] | 177 | DIDerivedType DT(Elements.getElement(i)); |
Devang Patel | f20c4f7 | 2011-04-12 22:53:02 +0000 | [diff] [blame] | 178 | if (getName() == DT.getName()) |
Manman Ren | be5576f | 2013-10-08 19:07:44 +0000 | [diff] [blame] | 179 | return (resolve(DT.getTypeDerivedFrom())); |
Devang Patel | 6d9f9fe | 2010-08-09 21:01:39 +0000 | [diff] [blame] | 180 | } |
Devang Patel | 6d9f9fe | 2010-08-09 21:01:39 +0000 | [diff] [blame] | 181 | } |
Devang Patel | f20c4f7 | 2011-04-12 22:53:02 +0000 | [diff] [blame] | 182 | return Ty; |
| 183 | } |
Bill Wendling | 2f921f8 | 2009-05-15 09:23:25 +0000 | [diff] [blame] | 184 | |
David Blaikie | 18d3375 | 2014-04-24 01:23:49 +0000 | [diff] [blame] | 185 | static LLVM_CONSTEXPR DwarfAccelTable::Atom TypeAtoms[] = { |
| 186 | DwarfAccelTable::Atom(dwarf::DW_ATOM_die_offset, dwarf::DW_FORM_data4), |
| 187 | DwarfAccelTable::Atom(dwarf::DW_ATOM_die_tag, dwarf::DW_FORM_data2), |
| 188 | DwarfAccelTable::Atom(dwarf::DW_ATOM_type_flags, dwarf::DW_FORM_data1)}; |
| 189 | |
Chris Lattner | f0d6bd3 | 2010-04-05 05:11:15 +0000 | [diff] [blame] | 190 | DwarfDebug::DwarfDebug(AsmPrinter *A, Module *M) |
David Blaikie | 0dc623c | 2014-10-24 17:53:38 +0000 | [diff] [blame] | 191 | : Asm(A), MMI(Asm->MMI), PrevLabel(nullptr), GlobalRangeCount(0), |
Frederic Riss | 9412d63 | 2015-03-04 02:30:17 +0000 | [diff] [blame] | 192 | InfoHolder(A, "info_string", DIEValueAllocator), |
Eric Christopher | 2037caf | 2014-01-28 00:49:26 +0000 | [diff] [blame] | 193 | UsedNonDefaultText(false), |
Frederic Riss | 9412d63 | 2015-03-04 02:30:17 +0000 | [diff] [blame] | 194 | SkeletonHolder(A, "skel_string", DIEValueAllocator), |
David Blaikie | e1c7974 | 2014-09-30 21:28:32 +0000 | [diff] [blame] | 195 | IsDarwin(Triple(A->getTargetTriple()).isOSDarwin()), |
Paul Robinson | 78cc082 | 2015-03-04 20:55:11 +0000 | [diff] [blame] | 196 | IsPS4(Triple(A->getTargetTriple()).isPS4()), |
David Blaikie | 2406a062 | 2014-04-23 23:37:35 +0000 | [diff] [blame] | 197 | AccelNames(DwarfAccelTable::Atom(dwarf::DW_ATOM_die_offset, |
David Blaikie | 0ee82b9 | 2014-04-24 00:53:32 +0000 | [diff] [blame] | 198 | dwarf::DW_FORM_data4)), |
| 199 | AccelObjC(DwarfAccelTable::Atom(dwarf::DW_ATOM_die_offset, |
David Blaikie | ecf0415 | 2014-04-24 01:02:42 +0000 | [diff] [blame] | 200 | dwarf::DW_FORM_data4)), |
| 201 | AccelNamespace(DwarfAccelTable::Atom(dwarf::DW_ATOM_die_offset, |
David Blaikie | 18d3375 | 2014-04-24 01:23:49 +0000 | [diff] [blame] | 202 | dwarf::DW_FORM_data4)), |
| 203 | AccelTypes(TypeAtoms) { |
Jim Grosbach | a8683bb | 2010-07-21 21:21:52 +0000 | [diff] [blame] | 204 | |
Craig Topper | 353eda4 | 2014-04-24 06:44:33 +0000 | [diff] [blame] | 205 | CurFn = nullptr; |
| 206 | CurMI = nullptr; |
Eric Christopher | ad9fe89 | 2012-04-02 17:58:52 +0000 | [diff] [blame] | 207 | |
Adrian Prantl | 5bf1d00 | 2013-10-15 20:26:37 +0000 | [diff] [blame] | 208 | // Turn on accelerator tables for Darwin by default, pubnames by |
Paul Robinson | 49e3896 | 2015-03-05 00:08:27 +0000 | [diff] [blame] | 209 | // default for non-Darwin/PS4, and handle split dwarf. |
Eric Christopher | 574b5c8 | 2013-08-19 21:41:38 +0000 | [diff] [blame] | 210 | if (DwarfAccelTables == Default) |
| 211 | HasDwarfAccelTables = IsDarwin; |
| 212 | else |
Eric Christopher | 5297df0 | 2013-08-26 20:58:35 +0000 | [diff] [blame] | 213 | HasDwarfAccelTables = DwarfAccelTables == Enable; |
Eric Christopher | 20b76a7 | 2012-08-23 22:36:40 +0000 | [diff] [blame] | 214 | |
Eric Christopher | cdf218d | 2012-12-10 19:51:21 +0000 | [diff] [blame] | 215 | if (SplitDwarf == Default) |
| 216 | HasSplitDwarf = false; |
Eric Christopher | 2942431 | 2012-11-12 22:22:20 +0000 | [diff] [blame] | 217 | else |
Eric Christopher | 574b5c8 | 2013-08-19 21:41:38 +0000 | [diff] [blame] | 218 | HasSplitDwarf = SplitDwarf == Enable; |
Eric Christopher | 2942431 | 2012-11-12 22:22:20 +0000 | [diff] [blame] | 219 | |
Eric Christopher | 4d36ca0 | 2013-08-26 23:24:35 +0000 | [diff] [blame] | 220 | if (DwarfPubSections == Default) |
Paul Robinson | 49e3896 | 2015-03-05 00:08:27 +0000 | [diff] [blame] | 221 | HasDwarfPubSections = !IsDarwin && !IsPS4; |
Eric Christopher | 574b5c8 | 2013-08-19 21:41:38 +0000 | [diff] [blame] | 222 | else |
Eric Christopher | 4d36ca0 | 2013-08-26 23:24:35 +0000 | [diff] [blame] | 223 | HasDwarfPubSections = DwarfPubSections == Enable; |
Eric Christopher | 7da2488 | 2013-08-19 21:07:38 +0000 | [diff] [blame] | 224 | |
Eric Christopher | 4c5bff3 | 2014-06-19 06:22:08 +0000 | [diff] [blame] | 225 | unsigned DwarfVersionNumber = Asm->TM.Options.MCOptions.DwarfVersion; |
Eric Christopher | 793c747 | 2014-04-28 20:42:22 +0000 | [diff] [blame] | 226 | DwarfVersion = DwarfVersionNumber ? DwarfVersionNumber |
| 227 | : MMI->getModule()->getDwarfVersion(); |
Manman Ren | ac8062b | 2013-07-02 23:40:10 +0000 | [diff] [blame] | 228 | |
Paul Robinson | 78cc082 | 2015-03-04 20:55:11 +0000 | [diff] [blame] | 229 | // Darwin and PS4 use the standard TLS opcode (defined in DWARF 3). |
| 230 | // Everybody else uses GNU's. |
| 231 | UseGNUTLSOpcode = !(IsDarwin || IsPS4) || DwarfVersion < 3; |
| 232 | |
Oliver Stannard | f7693f4 | 2014-06-19 15:39:33 +0000 | [diff] [blame] | 233 | Asm->OutStreamer.getContext().setDwarfVersion(DwarfVersion); |
| 234 | |
Dan Gohman | 6e681a5 | 2010-06-18 15:56:31 +0000 | [diff] [blame] | 235 | { |
| 236 | NamedRegionTimer T(DbgTimerName, DWARFGroupName, TimePassesIsEnabled); |
Eric Christopher | 58f4195 | 2012-11-19 22:42:15 +0000 | [diff] [blame] | 237 | beginModule(); |
Torok Edwin | f8dba24 | 2010-04-07 10:44:46 +0000 | [diff] [blame] | 238 | } |
Bill Wendling | 2f921f8 | 2009-05-15 09:23:25 +0000 | [diff] [blame] | 239 | } |
Bill Wendling | 2f921f8 | 2009-05-15 09:23:25 +0000 | [diff] [blame] | 240 | |
Reid Kleckner | dd2647e | 2014-04-30 20:34:31 +0000 | [diff] [blame] | 241 | // Define out of line so we don't have to include DwarfUnit.h in DwarfDebug.h. |
| 242 | DwarfDebug::~DwarfDebug() { } |
| 243 | |
Eric Christopher | acdcbdb | 2012-11-27 22:43:45 +0000 | [diff] [blame] | 244 | // Switch to the specified MCSection and emit an assembler |
| 245 | // temporary label to it if SymbolStem is specified. |
Rafael Espindola | 6b9998b | 2015-03-10 22:00:25 +0000 | [diff] [blame] | 246 | static void emitSectionSym(AsmPrinter *Asm, const MCSection *Section) { |
Eric Christopher | a7b6189 | 2011-11-07 09:18:38 +0000 | [diff] [blame] | 247 | Asm->OutStreamer.SwitchSection(Section); |
Rafael Espindola | 6b9998b | 2015-03-10 22:00:25 +0000 | [diff] [blame] | 248 | MCSymbol *TmpSym = Section->getBeginSymbol(); |
Eric Christopher | a7b6189 | 2011-11-07 09:18:38 +0000 | [diff] [blame] | 249 | Asm->OutStreamer.EmitLabel(TmpSym); |
Eric Christopher | a7b6189 | 2011-11-07 09:18:38 +0000 | [diff] [blame] | 250 | } |
| 251 | |
Eric Christopher | d9843b3 | 2011-11-10 19:25:34 +0000 | [diff] [blame] | 252 | static bool isObjCClass(StringRef Name) { |
| 253 | return Name.startswith("+") || Name.startswith("-"); |
| 254 | } |
| 255 | |
| 256 | static bool hasObjCCategory(StringRef Name) { |
Eric Christopher | b4bef6d | 2013-11-19 09:04:36 +0000 | [diff] [blame] | 257 | if (!isObjCClass(Name)) |
| 258 | return false; |
Eric Christopher | d9843b3 | 2011-11-10 19:25:34 +0000 | [diff] [blame] | 259 | |
Benjamin Kramer | 260de74 | 2013-08-24 12:15:54 +0000 | [diff] [blame] | 260 | return Name.find(") ") != StringRef::npos; |
Eric Christopher | d9843b3 | 2011-11-10 19:25:34 +0000 | [diff] [blame] | 261 | } |
| 262 | |
| 263 | static void getObjCClassCategory(StringRef In, StringRef &Class, |
| 264 | StringRef &Category) { |
| 265 | if (!hasObjCCategory(In)) { |
| 266 | Class = In.slice(In.find('[') + 1, In.find(' ')); |
| 267 | Category = ""; |
| 268 | return; |
| 269 | } |
| 270 | |
| 271 | Class = In.slice(In.find('[') + 1, In.find('(')); |
| 272 | Category = In.slice(In.find('[') + 1, In.find(' ')); |
| 273 | return; |
| 274 | } |
| 275 | |
| 276 | static StringRef getObjCMethodName(StringRef In) { |
| 277 | return In.slice(In.find(' ') + 1, In.find(']')); |
| 278 | } |
| 279 | |
| 280 | // Add the various names to the Dwarf accelerator table names. |
Eric Christopher | 9cd26af | 2013-09-20 23:22:52 +0000 | [diff] [blame] | 281 | // TODO: Determine whether or not we should add names for programs |
| 282 | // that do not have a DW_AT_name or DW_AT_linkage_name field - this |
| 283 | // is only slightly different than the lookup of non-standard ObjC names. |
David Blaikie | b0b3fcf | 2014-04-25 18:52:29 +0000 | [diff] [blame] | 284 | void DwarfDebug::addSubprogramNames(DISubprogram SP, DIE &Die) { |
Eric Christopher | b4bef6d | 2013-11-19 09:04:36 +0000 | [diff] [blame] | 285 | if (!SP.isDefinition()) |
| 286 | return; |
David Blaikie | 2406a062 | 2014-04-23 23:37:35 +0000 | [diff] [blame] | 287 | addAccelName(SP.getName(), Die); |
Eric Christopher | d9843b3 | 2011-11-10 19:25:34 +0000 | [diff] [blame] | 288 | |
| 289 | // If the linkage name is different than the name, go ahead and output |
| 290 | // that as well into the name table. |
| 291 | if (SP.getLinkageName() != "" && SP.getName() != SP.getLinkageName()) |
David Blaikie | 2406a062 | 2014-04-23 23:37:35 +0000 | [diff] [blame] | 292 | addAccelName(SP.getLinkageName(), Die); |
Eric Christopher | d9843b3 | 2011-11-10 19:25:34 +0000 | [diff] [blame] | 293 | |
| 294 | // If this is an Objective-C selector name add it to the ObjC accelerator |
| 295 | // too. |
| 296 | if (isObjCClass(SP.getName())) { |
| 297 | StringRef Class, Category; |
| 298 | getObjCClassCategory(SP.getName(), Class, Category); |
David Blaikie | 0ee82b9 | 2014-04-24 00:53:32 +0000 | [diff] [blame] | 299 | addAccelObjC(Class, Die); |
Eric Christopher | d9843b3 | 2011-11-10 19:25:34 +0000 | [diff] [blame] | 300 | if (Category != "") |
David Blaikie | 0ee82b9 | 2014-04-24 00:53:32 +0000 | [diff] [blame] | 301 | addAccelObjC(Category, Die); |
Eric Christopher | d9843b3 | 2011-11-10 19:25:34 +0000 | [diff] [blame] | 302 | // Also add the base method name to the name table. |
David Blaikie | 2406a062 | 2014-04-23 23:37:35 +0000 | [diff] [blame] | 303 | addAccelName(getObjCMethodName(SP.getName()), Die); |
Eric Christopher | d9843b3 | 2011-11-10 19:25:34 +0000 | [diff] [blame] | 304 | } |
| 305 | } |
| 306 | |
Manman Ren | 3eb9dff | 2013-09-09 19:05:21 +0000 | [diff] [blame] | 307 | /// isSubprogramContext - Return true if Context is either a subprogram |
| 308 | /// or another context nested inside a subprogram. |
| 309 | bool DwarfDebug::isSubprogramContext(const MDNode *Context) { |
| 310 | if (!Context) |
| 311 | return false; |
| 312 | DIDescriptor D(Context); |
| 313 | if (D.isSubprogram()) |
| 314 | return true; |
| 315 | if (D.isType()) |
Manman Ren | 116868e | 2013-09-09 19:47:11 +0000 | [diff] [blame] | 316 | return isSubprogramContext(resolve(DIType(Context).getContext())); |
Manman Ren | 3eb9dff | 2013-09-09 19:05:21 +0000 | [diff] [blame] | 317 | return false; |
| 318 | } |
| 319 | |
Manman Ren | 5b2f4b0 | 2013-09-11 19:40:28 +0000 | [diff] [blame] | 320 | /// Check whether we should create a DIE for the given Scope, return true |
| 321 | /// if we don't create a DIE (the corresponding DIE is null). |
Manman Ren | 2312ed3 | 2013-09-10 18:40:41 +0000 | [diff] [blame] | 322 | bool DwarfDebug::isLexicalScopeDIENull(LexicalScope *Scope) { |
| 323 | if (Scope->isAbstractScope()) |
| 324 | return false; |
| 325 | |
Manman Ren | 5b2f4b0 | 2013-09-11 19:40:28 +0000 | [diff] [blame] | 326 | // We don't create a DIE if there is no Range. |
Manman Ren | 2312ed3 | 2013-09-10 18:40:41 +0000 | [diff] [blame] | 327 | const SmallVectorImpl<InsnRange> &Ranges = Scope->getRanges(); |
| 328 | if (Ranges.empty()) |
| 329 | return true; |
| 330 | |
| 331 | if (Ranges.size() > 1) |
| 332 | return false; |
| 333 | |
Manman Ren | 5b2f4b0 | 2013-09-11 19:40:28 +0000 | [diff] [blame] | 334 | // We don't create a DIE if we have a single Range and the end label |
| 335 | // is null. |
David Blaikie | cd4b8a2 | 2014-08-31 02:14:26 +0000 | [diff] [blame] | 336 | return !getLabelAfterInsn(Ranges.front().second); |
Manman Ren | 2312ed3 | 2013-09-10 18:40:41 +0000 | [diff] [blame] | 337 | } |
| 338 | |
David Blaikie | 3a443c2 | 2014-11-04 22:12:25 +0000 | [diff] [blame] | 339 | template <typename Func> void forBothCUs(DwarfCompileUnit &CU, Func F) { |
| 340 | F(CU); |
| 341 | if (auto *SkelCU = CU.getSkeleton()) |
| 342 | F(*SkelCU); |
| 343 | } |
| 344 | |
David Blaikie | 73cc705 | 2014-10-09 20:36:27 +0000 | [diff] [blame] | 345 | void DwarfDebug::constructAbstractSubprogramScopeDIE(LexicalScope *Scope) { |
David Blaikie | e872a6e | 2014-04-29 15:58:35 +0000 | [diff] [blame] | 346 | assert(Scope && Scope->getScopeNode()); |
| 347 | assert(Scope->isAbstractScope()); |
| 348 | assert(!Scope->getInlinedAt()); |
| 349 | |
David Blaikie | 58410f2 | 2014-10-10 06:39:26 +0000 | [diff] [blame] | 350 | const MDNode *SP = Scope->getScopeNode(); |
David Blaikie | e872a6e | 2014-04-29 15:58:35 +0000 | [diff] [blame] | 351 | |
David Blaikie | 9ab4884 | 2014-10-10 03:09:38 +0000 | [diff] [blame] | 352 | ProcessedSPNodes.insert(SP); |
| 353 | |
David Blaikie | 1ea9db2 | 2014-05-21 23:14:12 +0000 | [diff] [blame] | 354 | // Find the subprogram's DwarfCompileUnit in the SPMap in case the subprogram |
| 355 | // was inlined from another compile unit. |
David Blaikie | 3a443c2 | 2014-11-04 22:12:25 +0000 | [diff] [blame] | 356 | auto &CU = SPMap[SP]; |
| 357 | forBothCUs(*CU, [&](DwarfCompileUnit &CU) { |
| 358 | CU.constructAbstractSubprogramScopeDIE(Scope); |
| 359 | }); |
David Blaikie | e872a6e | 2014-04-29 15:58:35 +0000 | [diff] [blame] | 360 | } |
| 361 | |
David Blaikie | 65a7466 | 2014-04-25 18:26:14 +0000 | [diff] [blame] | 362 | void DwarfDebug::addGnuPubAttributes(DwarfUnit &U, DIE &D) const { |
David Blaikie | 3c84262 | 2013-12-04 21:31:26 +0000 | [diff] [blame] | 363 | if (!GenerateGnuPubSections) |
| 364 | return; |
| 365 | |
David Blaikie | f9b6a55 | 2014-04-22 22:39:41 +0000 | [diff] [blame] | 366 | U.addFlag(D, dwarf::DW_AT_GNU_pubnames); |
David Blaikie | 3c84262 | 2013-12-04 21:31:26 +0000 | [diff] [blame] | 367 | } |
| 368 | |
Eric Christopher | 4287a49 | 2013-12-09 23:57:44 +0000 | [diff] [blame] | 369 | // Create new DwarfCompileUnit for the given metadata node with tag |
Eric Christopher | 48fef59 | 2012-12-20 21:58:40 +0000 | [diff] [blame] | 370 | // DW_TAG_compile_unit. |
David Blaikie | f9b6a55 | 2014-04-22 22:39:41 +0000 | [diff] [blame] | 371 | DwarfCompileUnit &DwarfDebug::constructDwarfCompileUnit(DICompileUnit DIUnit) { |
Devang Patel | 2d9caf9 | 2009-11-25 17:36:49 +0000 | [diff] [blame] | 372 | StringRef FN = DIUnit.getFilename(); |
Nick Lewycky | d1ee7f8 | 2011-11-02 20:55:33 +0000 | [diff] [blame] | 373 | CompilationDir = DIUnit.getDirectory(); |
Bill Wendling | 2b128d7 | 2009-05-20 23:19:06 +0000 | [diff] [blame] | 374 | |
David Blaikie | f9b6a55 | 2014-04-22 22:39:41 +0000 | [diff] [blame] | 375 | auto OwnedUnit = make_unique<DwarfCompileUnit>( |
David Blaikie | bd57905 | 2014-04-28 21:14:27 +0000 | [diff] [blame] | 376 | InfoHolder.getUnits().size(), DIUnit, Asm, this, &InfoHolder); |
David Blaikie | f9b6a55 | 2014-04-22 22:39:41 +0000 | [diff] [blame] | 377 | DwarfCompileUnit &NewCU = *OwnedUnit; |
David Blaikie | 92a2f8a | 2014-04-28 21:04:29 +0000 | [diff] [blame] | 378 | DIE &Die = NewCU.getUnitDie(); |
David Blaikie | f9b6a55 | 2014-04-22 22:39:41 +0000 | [diff] [blame] | 379 | InfoHolder.addUnit(std::move(OwnedUnit)); |
David Blaikie | cafd962 | 2014-11-02 08:51:37 +0000 | [diff] [blame] | 380 | if (useSplitDwarf()) |
| 381 | NewCU.setSkeleton(constructSkeletonCU(NewCU)); |
David Blaikie | f9b6a55 | 2014-04-22 22:39:41 +0000 | [diff] [blame] | 382 | |
David Blaikie | 7ac5149 | 2014-03-20 17:05:45 +0000 | [diff] [blame] | 383 | // LTO with assembly output shares a single line table amongst multiple CUs. |
| 384 | // To avoid the compilation directory being ambiguous, let the line table |
| 385 | // explicitly describe the directory of all files, never relying on the |
| 386 | // compilation directory. |
David Blaikie | 47f4b82 | 2014-03-19 00:11:28 +0000 | [diff] [blame] | 387 | if (!Asm->OutStreamer.hasRawTextSupport() || SingleCU) |
David Blaikie | e05274d | 2014-03-18 00:11:48 +0000 | [diff] [blame] | 388 | Asm->OutStreamer.getContext().setMCLineTableCompilationDir( |
David Blaikie | f9b6a55 | 2014-04-22 22:39:41 +0000 | [diff] [blame] | 389 | NewCU.getUniqueID(), CompilationDir); |
David Blaikie | 2666e24 | 2013-12-06 19:38:46 +0000 | [diff] [blame] | 390 | |
David Blaikie | 92a2f8a | 2014-04-28 21:04:29 +0000 | [diff] [blame] | 391 | NewCU.addString(Die, dwarf::DW_AT_producer, DIUnit.getProducer()); |
| 392 | NewCU.addUInt(Die, dwarf::DW_AT_language, dwarf::DW_FORM_data2, |
David Blaikie | 637cac4 | 2014-04-22 23:09:36 +0000 | [diff] [blame] | 393 | DIUnit.getLanguage()); |
David Blaikie | 92a2f8a | 2014-04-28 21:04:29 +0000 | [diff] [blame] | 394 | NewCU.addString(Die, dwarf::DW_AT_name, FN); |
Eric Christopher | 52ce718 | 2013-04-09 19:23:15 +0000 | [diff] [blame] | 395 | |
Eric Christopher | 52ce718 | 2013-04-09 19:23:15 +0000 | [diff] [blame] | 396 | if (!useSplitDwarf()) { |
Rafael Espindola | 063d725 | 2015-03-10 16:58:10 +0000 | [diff] [blame] | 397 | NewCU.initStmtList(); |
Eric Christopher | a51d3fc | 2013-09-27 22:50:48 +0000 | [diff] [blame] | 398 | |
| 399 | // If we're using split dwarf the compilation dir is going to be in the |
| 400 | // skeleton CU and so we don't need to duplicate it here. |
| 401 | if (!CompilationDir.empty()) |
David Blaikie | 92a2f8a | 2014-04-28 21:04:29 +0000 | [diff] [blame] | 402 | NewCU.addString(Die, dwarf::DW_AT_comp_dir, CompilationDir); |
Eric Christopher | a51d3fc | 2013-09-27 22:50:48 +0000 | [diff] [blame] | 403 | |
David Blaikie | 92a2f8a | 2014-04-28 21:04:29 +0000 | [diff] [blame] | 404 | addGnuPubAttributes(NewCU, Die); |
Eric Christopher | 52ce718 | 2013-04-09 19:23:15 +0000 | [diff] [blame] | 405 | } |
Bill Wendling | 2b128d7 | 2009-05-20 23:19:06 +0000 | [diff] [blame] | 406 | |
Bill Wendling | 2b128d7 | 2009-05-20 23:19:06 +0000 | [diff] [blame] | 407 | if (DIUnit.isOptimized()) |
David Blaikie | 92a2f8a | 2014-04-28 21:04:29 +0000 | [diff] [blame] | 408 | NewCU.addFlag(Die, dwarf::DW_AT_APPLE_optimized); |
Bill Wendling | 2b128d7 | 2009-05-20 23:19:06 +0000 | [diff] [blame] | 409 | |
Devang Patel | 2d9caf9 | 2009-11-25 17:36:49 +0000 | [diff] [blame] | 410 | StringRef Flags = DIUnit.getFlags(); |
| 411 | if (!Flags.empty()) |
David Blaikie | 92a2f8a | 2014-04-28 21:04:29 +0000 | [diff] [blame] | 412 | NewCU.addString(Die, dwarf::DW_AT_APPLE_flags, Flags); |
Eric Christopher | 6a84138 | 2012-11-19 22:42:10 +0000 | [diff] [blame] | 413 | |
Nick Lewycky | 479a8fe | 2011-10-17 23:27:36 +0000 | [diff] [blame] | 414 | if (unsigned RVer = DIUnit.getRunTimeVersion()) |
David Blaikie | 92a2f8a | 2014-04-28 21:04:29 +0000 | [diff] [blame] | 415 | NewCU.addUInt(Die, dwarf::DW_AT_APPLE_major_runtime_vers, |
David Blaikie | 637cac4 | 2014-04-22 23:09:36 +0000 | [diff] [blame] | 416 | dwarf::DW_FORM_data1, RVer); |
Bill Wendling | 2b128d7 | 2009-05-20 23:19:06 +0000 | [diff] [blame] | 417 | |
David Blaikie | cafd962 | 2014-11-02 08:51:37 +0000 | [diff] [blame] | 418 | if (useSplitDwarf()) |
Rafael Espindola | 063d725 | 2015-03-10 16:58:10 +0000 | [diff] [blame] | 419 | NewCU.initSection(Asm->getObjFileLowering().getDwarfInfoDWOSection()); |
David Blaikie | cafd962 | 2014-11-02 08:51:37 +0000 | [diff] [blame] | 420 | else |
Rafael Espindola | 063d725 | 2015-03-10 16:58:10 +0000 | [diff] [blame] | 421 | NewCU.initSection(Asm->getObjFileLowering().getDwarfInfoSection()); |
Eric Christopher | d039baa | 2013-12-30 03:40:32 +0000 | [diff] [blame] | 422 | |
David Blaikie | f9b6a55 | 2014-04-22 22:39:41 +0000 | [diff] [blame] | 423 | CUMap.insert(std::make_pair(DIUnit, &NewCU)); |
David Blaikie | 92a2f8a | 2014-04-28 21:04:29 +0000 | [diff] [blame] | 424 | CUDieMap.insert(std::make_pair(&Die, &NewCU)); |
Devang Patel | eb1bb4e | 2011-08-16 22:09:43 +0000 | [diff] [blame] | 425 | return NewCU; |
Devang Patel | 1a0df9a | 2010-05-10 22:49:55 +0000 | [diff] [blame] | 426 | } |
| 427 | |
David Blaikie | 8912df1 | 2014-08-31 05:41:15 +0000 | [diff] [blame] | 428 | void DwarfDebug::constructAndAddImportedEntityDIE(DwarfCompileUnit &TheCU, |
| 429 | const MDNode *N) { |
David Blaikie | 1fd4365 | 2013-05-07 21:35:53 +0000 | [diff] [blame] | 430 | DIImportedEntity Module(N); |
David Blaikie | 5e390e4 | 2014-02-04 01:23:52 +0000 | [diff] [blame] | 431 | assert(Module.Verify()); |
David Blaikie | f9b6a55 | 2014-04-22 22:39:41 +0000 | [diff] [blame] | 432 | if (DIE *D = TheCU.getOrCreateContextDIE(Module.getContext())) |
David Blaikie | febfafd | 2014-10-06 05:37:24 +0000 | [diff] [blame] | 433 | D->addChild(TheCU.constructImportedEntityDIE(Module)); |
David Blaikie | f55abea | 2013-04-22 06:12:31 +0000 | [diff] [blame] | 434 | } |
| 435 | |
Eric Christopher | acdcbdb | 2012-11-27 22:43:45 +0000 | [diff] [blame] | 436 | // Emit all Dwarf sections that should come prior to the content. Create |
| 437 | // global DIEs and emit initial debug info sections. This is invoked by |
| 438 | // the target AsmPrinter. |
Eric Christopher | 58f4195 | 2012-11-19 22:42:15 +0000 | [diff] [blame] | 439 | void DwarfDebug::beginModule() { |
Devang Patel | 6c74a87 | 2010-04-27 19:46:33 +0000 | [diff] [blame] | 440 | if (DisableDebugInfoPrinting) |
| 441 | return; |
| 442 | |
Eric Christopher | 58f4195 | 2012-11-19 22:42:15 +0000 | [diff] [blame] | 443 | const Module *M = MMI->getModule(); |
| 444 | |
David Blaikie | 2f04011 | 2014-07-25 16:10:16 +0000 | [diff] [blame] | 445 | FunctionDIs = makeSubprogramMap(*M); |
| 446 | |
Devang Patel | e02e585 | 2011-05-03 16:45:22 +0000 | [diff] [blame] | 447 | NamedMDNode *CU_Nodes = M->getNamedMetadata("llvm.dbg.cu"); |
David Blaikie | dc69ebb | 2013-03-11 23:39:23 +0000 | [diff] [blame] | 448 | if (!CU_Nodes) |
Devang Patel | 07bb9ee | 2011-08-15 23:47:24 +0000 | [diff] [blame] | 449 | return; |
Manman Ren | 6035203 | 2013-09-05 18:48:31 +0000 | [diff] [blame] | 450 | TypeIdentifierMap = generateDITypeIdentifierMap(CU_Nodes); |
Devang Patel | e02e585 | 2011-05-03 16:45:22 +0000 | [diff] [blame] | 451 | |
David Blaikie | dc69ebb | 2013-03-11 23:39:23 +0000 | [diff] [blame] | 452 | // Emit initial sections so we can reference labels later. |
| 453 | emitSectionLabels(); |
| 454 | |
David Blaikie | 47f4b82 | 2014-03-19 00:11:28 +0000 | [diff] [blame] | 455 | SingleCU = CU_Nodes->getNumOperands() == 1; |
David Blaikie | e05274d | 2014-03-18 00:11:48 +0000 | [diff] [blame] | 456 | |
Duncan P. N. Exon Smith | de36e80 | 2014-11-11 21:30:22 +0000 | [diff] [blame] | 457 | for (MDNode *N : CU_Nodes->operands()) { |
| 458 | DICompileUnit CUNode(N); |
David Blaikie | f9b6a55 | 2014-04-22 22:39:41 +0000 | [diff] [blame] | 459 | DwarfCompileUnit &CU = constructDwarfCompileUnit(CUNode); |
David Blaikie | 1fd4365 | 2013-05-07 21:35:53 +0000 | [diff] [blame] | 460 | DIArray ImportedEntities = CUNode.getImportedEntities(); |
| 461 | for (unsigned i = 0, e = ImportedEntities.getNumElements(); i != e; ++i) |
David Blaikie | 684fc53 | 2013-05-06 23:33:07 +0000 | [diff] [blame] | 462 | ScopesWithImportedEntities.push_back(std::make_pair( |
David Blaikie | 1fd4365 | 2013-05-07 21:35:53 +0000 | [diff] [blame] | 463 | DIImportedEntity(ImportedEntities.getElement(i)).getContext(), |
| 464 | ImportedEntities.getElement(i))); |
Dario Domizioli | 5f7008a | 2015-03-03 18:40:53 +0000 | [diff] [blame] | 465 | // Stable sort to preserve the order of appearance of imported entities. |
| 466 | // This is to avoid out-of-order processing of interdependent declarations |
| 467 | // within the same scope, e.g. { namespace A = base; namespace B = A; } |
| 468 | std::stable_sort(ScopesWithImportedEntities.begin(), |
| 469 | ScopesWithImportedEntities.end(), less_first()); |
David Blaikie | dc69ebb | 2013-03-11 23:39:23 +0000 | [diff] [blame] | 470 | DIArray GVs = CUNode.getGlobalVariables(); |
| 471 | for (unsigned i = 0, e = GVs.getNumElements(); i != e; ++i) |
Frederic Riss | 9ba9eff | 2014-09-19 15:12:03 +0000 | [diff] [blame] | 472 | CU.getOrCreateGlobalVariableDIE(DIGlobalVariable(GVs.getElement(i))); |
David Blaikie | 6ba88e0 | 2014-08-29 22:10:52 +0000 | [diff] [blame] | 473 | DIArray SPs = CUNode.getSubprograms(); |
| 474 | for (unsigned i = 0, e = SPs.getNumElements(); i != e; ++i) |
| 475 | SPMap.insert(std::make_pair(SPs.getElement(i), &CU)); |
David Blaikie | dc69ebb | 2013-03-11 23:39:23 +0000 | [diff] [blame] | 476 | DIArray EnumTypes = CUNode.getEnumTypes(); |
Manman Ren | bd1628a | 2014-07-28 23:04:20 +0000 | [diff] [blame] | 477 | for (unsigned i = 0, e = EnumTypes.getNumElements(); i != e; ++i) { |
| 478 | DIType Ty(EnumTypes.getElement(i)); |
| 479 | // The enum types array by design contains pointers to |
| 480 | // MDNodes rather than DIRefs. Unique them here. |
| 481 | DIType UniqueTy(resolve(Ty.getRef())); |
| 482 | CU.getOrCreateTypeDIE(UniqueTy); |
| 483 | } |
David Blaikie | dc69ebb | 2013-03-11 23:39:23 +0000 | [diff] [blame] | 484 | DIArray RetainedTypes = CUNode.getRetainedTypes(); |
Adrian Prantl | 0aa1aa2 | 2014-03-18 02:35:03 +0000 | [diff] [blame] | 485 | for (unsigned i = 0, e = RetainedTypes.getNumElements(); i != e; ++i) { |
| 486 | DIType Ty(RetainedTypes.getElement(i)); |
| 487 | // The retained types array by design contains pointers to |
| 488 | // MDNodes rather than DIRefs. Unique them here. |
| 489 | DIType UniqueTy(resolve(Ty.getRef())); |
David Blaikie | f9b6a55 | 2014-04-22 22:39:41 +0000 | [diff] [blame] | 490 | CU.getOrCreateTypeDIE(UniqueTy); |
Adrian Prantl | 0aa1aa2 | 2014-03-18 02:35:03 +0000 | [diff] [blame] | 491 | } |
David Blaikie | f55abea | 2013-04-22 06:12:31 +0000 | [diff] [blame] | 492 | // Emit imported_modules last so that the relevant context is already |
| 493 | // available. |
David Blaikie | 1fd4365 | 2013-05-07 21:35:53 +0000 | [diff] [blame] | 494 | for (unsigned i = 0, e = ImportedEntities.getNumElements(); i != e; ++i) |
David Blaikie | 8912df1 | 2014-08-31 05:41:15 +0000 | [diff] [blame] | 495 | constructAndAddImportedEntityDIE(CU, ImportedEntities.getElement(i)); |
David Blaikie | dc69ebb | 2013-03-11 23:39:23 +0000 | [diff] [blame] | 496 | } |
Eric Christopher | 6a84138 | 2012-11-19 22:42:10 +0000 | [diff] [blame] | 497 | |
Chris Lattner | 7cfa70e | 2010-04-05 02:19:28 +0000 | [diff] [blame] | 498 | // Tell MMI that we have debug info. |
| 499 | MMI->setDebugInfoAvailability(true); |
Bill Wendling | 2b128d7 | 2009-05-20 23:19:06 +0000 | [diff] [blame] | 500 | } |
| 501 | |
David Blaikie | eb1a272 | 2014-06-13 22:18:23 +0000 | [diff] [blame] | 502 | void DwarfDebug::finishVariableDefinitions() { |
| 503 | for (const auto &Var : ConcreteVariables) { |
| 504 | DIE *VariableDie = Var->getDIE(); |
David Blaikie | f73ae4f | 2014-08-12 00:00:31 +0000 | [diff] [blame] | 505 | assert(VariableDie); |
David Blaikie | eb1a272 | 2014-06-13 22:18:23 +0000 | [diff] [blame] | 506 | // FIXME: Consider the time-space tradeoff of just storing the unit pointer |
| 507 | // in the ConcreteVariables list, rather than looking it up again here. |
| 508 | // DIE::getUnit isn't simple - it walks parent pointers, etc. |
| 509 | DwarfCompileUnit *Unit = lookupUnit(VariableDie->getUnit()); |
| 510 | assert(Unit); |
David Blaikie | e847f13 | 2014-06-13 22:35:44 +0000 | [diff] [blame] | 511 | DbgVariable *AbsVar = getExistingAbstractVariable(Var->getVariable()); |
David Blaikie | eb1a272 | 2014-06-13 22:18:23 +0000 | [diff] [blame] | 512 | if (AbsVar && AbsVar->getDIE()) { |
| 513 | Unit->addDIEEntry(*VariableDie, dwarf::DW_AT_abstract_origin, |
| 514 | *AbsVar->getDIE()); |
| 515 | } else |
| 516 | Unit->applyVariableAttributes(*Var, *VariableDie); |
| 517 | } |
| 518 | } |
| 519 | |
David Blaikie | f7221ad | 2014-05-27 18:37:43 +0000 | [diff] [blame] | 520 | void DwarfDebug::finishSubprogramDefinitions() { |
David Blaikie | 7d6f29d | 2014-10-10 16:59:52 +0000 | [diff] [blame] | 521 | for (const auto &P : SPMap) |
David Blaikie | 3a443c2 | 2014-11-04 22:12:25 +0000 | [diff] [blame] | 522 | forBothCUs(*P.second, [&](DwarfCompileUnit &CU) { |
| 523 | CU.finishSubprogramDefinition(DISubprogram(P.first)); |
| 524 | }); |
David Blaikie | f7221ad | 2014-05-27 18:37:43 +0000 | [diff] [blame] | 525 | } |
| 526 | |
| 527 | |
Eric Christopher | 960ac37 | 2012-11-22 00:59:49 +0000 | [diff] [blame] | 528 | // Collect info for variables that were optimized out. |
| 529 | void DwarfDebug::collectDeadVariables() { |
| 530 | const Module *M = MMI->getModule(); |
Eric Christopher | 960ac37 | 2012-11-22 00:59:49 +0000 | [diff] [blame] | 531 | |
| 532 | if (NamedMDNode *CU_Nodes = M->getNamedMetadata("llvm.dbg.cu")) { |
Duncan P. N. Exon Smith | de36e80 | 2014-11-11 21:30:22 +0000 | [diff] [blame] | 533 | for (MDNode *N : CU_Nodes->operands()) { |
| 534 | DICompileUnit TheCU(N); |
David Blaikie | 9ba7254 | 2014-05-14 21:52:46 +0000 | [diff] [blame] | 535 | // Construct subprogram DIE and add variables DIEs. |
| 536 | DwarfCompileUnit *SPCU = |
| 537 | static_cast<DwarfCompileUnit *>(CUMap.lookup(TheCU)); |
| 538 | assert(SPCU && "Unable to find Compile Unit!"); |
Eric Christopher | 960ac37 | 2012-11-22 00:59:49 +0000 | [diff] [blame] | 539 | DIArray Subprograms = TheCU.getSubprograms(); |
| 540 | for (unsigned i = 0, e = Subprograms.getNumElements(); i != e; ++i) { |
Eric Christopher | 735401c | 2012-11-27 00:13:51 +0000 | [diff] [blame] | 541 | DISubprogram SP(Subprograms.getElement(i)); |
Eric Christopher | a6c38a3 | 2013-10-15 23:31:38 +0000 | [diff] [blame] | 542 | if (ProcessedSPNodes.count(SP) != 0) |
| 543 | continue; |
David Blaikie | 1d96cc2 | 2014-10-31 22:30:30 +0000 | [diff] [blame] | 544 | SPCU->collectDeadVariables(SP); |
Eric Christopher | 960ac37 | 2012-11-22 00:59:49 +0000 | [diff] [blame] | 545 | } |
| 546 | } |
| 547 | } |
Eric Christopher | 960ac37 | 2012-11-22 00:59:49 +0000 | [diff] [blame] | 548 | } |
| 549 | |
| 550 | void DwarfDebug::finalizeModuleInfo() { |
Rafael Espindola | 063d725 | 2015-03-10 16:58:10 +0000 | [diff] [blame] | 551 | const TargetLoweringObjectFile &TLOF = Asm->getObjFileLowering(); |
| 552 | |
David Blaikie | 3c2fff3 | 2014-05-27 18:37:48 +0000 | [diff] [blame] | 553 | finishSubprogramDefinitions(); |
| 554 | |
David Blaikie | eb1a272 | 2014-06-13 22:18:23 +0000 | [diff] [blame] | 555 | finishVariableDefinitions(); |
| 556 | |
Eric Christopher | 960ac37 | 2012-11-22 00:59:49 +0000 | [diff] [blame] | 557 | // Collect info for variables that were optimized out. |
| 558 | collectDeadVariables(); |
| 559 | |
Eric Christopher | ad10cb5 | 2013-12-04 23:24:38 +0000 | [diff] [blame] | 560 | // Handle anything that needs to be done on a per-unit basis after |
| 561 | // all other generation. |
David Blaikie | 1998a2e | 2014-11-01 01:11:19 +0000 | [diff] [blame] | 562 | for (const auto &P : CUMap) { |
| 563 | auto &TheCU = *P.second; |
Eric Christopher | 60eb769 | 2013-08-12 20:27:48 +0000 | [diff] [blame] | 564 | // Emit DW_AT_containing_type attribute to connect types with their |
| 565 | // vtable holding type. |
David Blaikie | 1998a2e | 2014-11-01 01:11:19 +0000 | [diff] [blame] | 566 | TheCU.constructContainingTypeDIEs(); |
Eric Christopher | 60eb769 | 2013-08-12 20:27:48 +0000 | [diff] [blame] | 567 | |
Eric Christopher | 46e2343 | 2013-12-20 04:16:18 +0000 | [diff] [blame] | 568 | // Add CU specific attributes if we need to add any. |
David Blaikie | 1998a2e | 2014-11-01 01:11:19 +0000 | [diff] [blame] | 569 | // If we're splitting the dwarf out now that we've got the entire |
| 570 | // CU then add the dwo id to it. |
| 571 | auto *SkCU = TheCU.getSkeleton(); |
| 572 | if (useSplitDwarf()) { |
| 573 | // Emit a unique identifier for this CU. |
| 574 | uint64_t ID = DIEHash(Asm).computeCUSignature(TheCU.getUnitDie()); |
| 575 | TheCU.addUInt(TheCU.getUnitDie(), dwarf::DW_AT_GNU_dwo_id, |
| 576 | dwarf::DW_FORM_data8, ID); |
| 577 | SkCU->addUInt(SkCU->getUnitDie(), dwarf::DW_AT_GNU_dwo_id, |
| 578 | dwarf::DW_FORM_data8, ID); |
David Blaikie | 3ffe4dd | 2014-03-25 05:34:24 +0000 | [diff] [blame] | 579 | |
David Blaikie | 1998a2e | 2014-11-01 01:11:19 +0000 | [diff] [blame] | 580 | // We don't keep track of which addresses are used in which CU so this |
| 581 | // is a bit pessimistic under LTO. |
Rafael Espindola | 063d725 | 2015-03-10 16:58:10 +0000 | [diff] [blame] | 582 | if (!AddrPool.isEmpty()) { |
| 583 | const MCSymbol *Sym = TLOF.getDwarfAddrSection()->getBeginSymbol(); |
David Blaikie | 1998a2e | 2014-11-01 01:11:19 +0000 | [diff] [blame] | 584 | SkCU->addSectionLabel(SkCU->getUnitDie(), dwarf::DW_AT_GNU_addr_base, |
Rafael Espindola | 063d725 | 2015-03-10 16:58:10 +0000 | [diff] [blame] | 585 | Sym, Sym); |
| 586 | } |
| 587 | if (!SkCU->getRangeLists().empty()) { |
| 588 | const MCSymbol *Sym = TLOF.getDwarfRangesSection()->getBeginSymbol(); |
David Blaikie | 1998a2e | 2014-11-01 01:11:19 +0000 | [diff] [blame] | 589 | SkCU->addSectionLabel(SkCU->getUnitDie(), dwarf::DW_AT_GNU_ranges_base, |
Rafael Espindola | 063d725 | 2015-03-10 16:58:10 +0000 | [diff] [blame] | 590 | Sym, Sym); |
| 591 | } |
David Blaikie | 1998a2e | 2014-11-01 01:11:19 +0000 | [diff] [blame] | 592 | } |
Eric Christopher | d866720 | 2013-12-30 17:22:27 +0000 | [diff] [blame] | 593 | |
David Blaikie | 1998a2e | 2014-11-01 01:11:19 +0000 | [diff] [blame] | 594 | // If we have code split among multiple sections or non-contiguous |
| 595 | // ranges of code then emit a DW_AT_ranges attribute on the unit that will |
| 596 | // remain in the .o file, otherwise add a DW_AT_low_pc. |
| 597 | // FIXME: We should use ranges allow reordering of code ala |
| 598 | // .subsections_via_symbols in mach-o. This would mean turning on |
| 599 | // ranges for all subprogram DIEs for mach-o. |
David Blaikie | a8be0a7 | 2014-11-01 01:15:24 +0000 | [diff] [blame] | 600 | DwarfCompileUnit &U = SkCU ? *SkCU : TheCU; |
David Blaikie | 5b02a19 | 2014-11-03 23:10:59 +0000 | [diff] [blame] | 601 | if (unsigned NumRanges = TheCU.getRanges().size()) { |
| 602 | if (NumRanges > 1) |
David Blaikie | 1998a2e | 2014-11-01 01:11:19 +0000 | [diff] [blame] | 603 | // A DW_AT_low_pc attribute may also be specified in combination with |
| 604 | // DW_AT_ranges to specify the default base address for use in |
| 605 | // location lists (see Section 2.6.2) and range lists (see Section |
| 606 | // 2.17.3). |
| 607 | U.addUInt(U.getUnitDie(), dwarf::DW_AT_low_pc, dwarf::DW_FORM_addr, 0); |
David Blaikie | 5b02a19 | 2014-11-03 23:10:59 +0000 | [diff] [blame] | 608 | else |
| 609 | TheCU.setBaseAddress(TheCU.getRanges().front().getStart()); |
| 610 | U.attachRangesOrLowHighPC(U.getUnitDie(), TheCU.takeRanges()); |
Eric Christopher | 60eb769 | 2013-08-12 20:27:48 +0000 | [diff] [blame] | 611 | } |
| 612 | } |
| 613 | |
| 614 | // Compute DIE offsets and sizes. |
Eric Christopher | c8a310e | 2012-12-10 23:34:43 +0000 | [diff] [blame] | 615 | InfoHolder.computeSizeAndOffsets(); |
| 616 | if (useSplitDwarf()) |
| 617 | SkeletonHolder.computeSizeAndOffsets(); |
Eric Christopher | 960ac37 | 2012-11-22 00:59:49 +0000 | [diff] [blame] | 618 | } |
| 619 | |
Eric Christopher | acdcbdb | 2012-11-27 22:43:45 +0000 | [diff] [blame] | 620 | // Emit all Dwarf sections that should come after the content. |
Eric Christopher | 960ac37 | 2012-11-22 00:59:49 +0000 | [diff] [blame] | 621 | void DwarfDebug::endModule() { |
Rafael Espindola | 063d725 | 2015-03-10 16:58:10 +0000 | [diff] [blame] | 622 | const TargetLoweringObjectFile &TLOF = Asm->getObjFileLowering(); |
Craig Topper | e73658d | 2014-04-28 04:05:08 +0000 | [diff] [blame] | 623 | assert(CurFn == nullptr); |
| 624 | assert(CurMI == nullptr); |
Eric Christopher | 960ac37 | 2012-11-22 00:59:49 +0000 | [diff] [blame] | 625 | |
David Blaikie | 0dc623c | 2014-10-24 17:53:38 +0000 | [diff] [blame] | 626 | // If we aren't actually generating debug info (check beginModule - |
| 627 | // conditionalized on !DisableDebugInfoPrinting and the presence of the |
| 628 | // llvm.dbg.cu metadata node) |
Rafael Espindola | 6b9998b | 2015-03-10 22:00:25 +0000 | [diff] [blame] | 629 | if (!TLOF.getDwarfInfoSection()->getBeginSymbol()->isInSection()) |
Eric Christopher | b4bef6d | 2013-11-19 09:04:36 +0000 | [diff] [blame] | 630 | return; |
Eric Christopher | 960ac37 | 2012-11-22 00:59:49 +0000 | [diff] [blame] | 631 | |
Eric Christopher | 960ac37 | 2012-11-22 00:59:49 +0000 | [diff] [blame] | 632 | // Finalize the debug info for the module. |
| 633 | finalizeModuleInfo(); |
Bill Wendling | 2b128d7 | 2009-05-20 23:19:06 +0000 | [diff] [blame] | 634 | |
Eric Christopher | 9a8f5ed | 2013-11-19 09:04:50 +0000 | [diff] [blame] | 635 | emitDebugStr(); |
Eric Christopher | 9cd26af | 2013-09-20 23:22:52 +0000 | [diff] [blame] | 636 | |
Rafael Espindola | 063d725 | 2015-03-10 16:58:10 +0000 | [diff] [blame] | 637 | if (useSplitDwarf()) |
| 638 | emitDebugLocDWO(); |
| 639 | else |
| 640 | // Emit info into a debug loc section. |
| 641 | emitDebugLoc(); |
| 642 | |
Eric Christopher | 9a8f5ed | 2013-11-19 09:04:50 +0000 | [diff] [blame] | 643 | // Emit all the DIEs into a debug info section. |
| 644 | emitDebugInfo(); |
Eric Christopher | 4c9b119 | 2012-11-27 00:41:54 +0000 | [diff] [blame] | 645 | |
Eric Christopher | 9a8f5ed | 2013-11-19 09:04:50 +0000 | [diff] [blame] | 646 | // Corresponding abbreviations into a abbrev section. |
| 647 | emitAbbreviations(); |
Eric Christopher | 95198f50 | 2012-11-27 22:43:42 +0000 | [diff] [blame] | 648 | |
Eric Christopher | 9a8f5ed | 2013-11-19 09:04:50 +0000 | [diff] [blame] | 649 | // Emit info into a debug aranges section. |
Eric Christopher | 02dbadb | 2014-02-14 01:26:55 +0000 | [diff] [blame] | 650 | if (GenerateARangeSection) |
| 651 | emitDebugARanges(); |
Eric Christopher | 95198f50 | 2012-11-27 22:43:42 +0000 | [diff] [blame] | 652 | |
Eric Christopher | 9a8f5ed | 2013-11-19 09:04:50 +0000 | [diff] [blame] | 653 | // Emit info into a debug ranges section. |
| 654 | emitDebugRanges(); |
Eric Christopher | 95198f50 | 2012-11-27 22:43:42 +0000 | [diff] [blame] | 655 | |
Eric Christopher | 9a8f5ed | 2013-11-19 09:04:50 +0000 | [diff] [blame] | 656 | if (useSplitDwarf()) { |
| 657 | emitDebugStrDWO(); |
Eric Christopher | 9c2ecd9 | 2012-11-30 23:59:06 +0000 | [diff] [blame] | 658 | emitDebugInfoDWO(); |
Eric Christopher | 3c5a191 | 2012-12-19 22:02:53 +0000 | [diff] [blame] | 659 | emitDebugAbbrevDWO(); |
David Blaikie | 4a2f95f | 2014-03-18 01:17:26 +0000 | [diff] [blame] | 660 | emitDebugLineDWO(); |
Eric Christopher | 962c908 | 2013-01-15 23:56:56 +0000 | [diff] [blame] | 661 | // Emit DWO addresses. |
David Blaikie | d75fb28 | 2014-04-23 21:20:10 +0000 | [diff] [blame] | 662 | AddrPool.emit(*Asm, Asm->getObjFileLowering().getDwarfAddrSection()); |
Rafael Espindola | 063d725 | 2015-03-10 16:58:10 +0000 | [diff] [blame] | 663 | } |
Bill Wendling | 2b128d7 | 2009-05-20 23:19:06 +0000 | [diff] [blame] | 664 | |
Eric Christopher | a876b82 | 2012-08-23 07:32:06 +0000 | [diff] [blame] | 665 | // Emit info into the dwarf accelerator table sections. |
Eric Christopher | 20b76a7 | 2012-08-23 22:36:40 +0000 | [diff] [blame] | 666 | if (useDwarfAccelTables()) { |
Eric Christopher | 4996c70 | 2011-11-07 09:24:32 +0000 | [diff] [blame] | 667 | emitAccelNames(); |
| 668 | emitAccelObjC(); |
| 669 | emitAccelNamespaces(); |
| 670 | emitAccelTypes(); |
| 671 | } |
Eric Christopher | 6a84138 | 2012-11-19 22:42:10 +0000 | [diff] [blame] | 672 | |
Eric Christopher | 4b35818 | 2013-08-30 00:40:17 +0000 | [diff] [blame] | 673 | // Emit the pubnames and pubtypes sections if requested. |
| 674 | if (HasDwarfPubSections) { |
David Blaikie | 70a3320 | 2013-09-19 17:33:35 +0000 | [diff] [blame] | 675 | emitDebugPubNames(GenerateGnuPubSections); |
| 676 | emitDebugPubTypes(GenerateGnuPubSections); |
Eric Christopher | 4b35818 | 2013-08-30 00:40:17 +0000 | [diff] [blame] | 677 | } |
Devang Patel | 04d2f2d | 2009-11-24 01:14:22 +0000 | [diff] [blame] | 678 | |
Devang Patel | d070128 | 2010-08-02 17:32:15 +0000 | [diff] [blame] | 679 | // clean up. |
Devang Patel | eb1bb4e | 2011-08-16 22:09:43 +0000 | [diff] [blame] | 680 | SPMap.clear(); |
David Blaikie | 825bdd2 | 2014-05-21 22:41:17 +0000 | [diff] [blame] | 681 | AbstractVariables.clear(); |
Bill Wendling | 2b128d7 | 2009-05-20 23:19:06 +0000 | [diff] [blame] | 682 | } |
| 683 | |
Eric Christopher | acdcbdb | 2012-11-27 22:43:45 +0000 | [diff] [blame] | 684 | // Find abstract variable, if any, associated with Var. |
David Blaikie | be7c677 | 2014-06-13 22:29:31 +0000 | [diff] [blame] | 685 | DbgVariable *DwarfDebug::getExistingAbstractVariable(const DIVariable &DV, |
David Blaikie | 36408e7 | 2014-06-04 23:50:52 +0000 | [diff] [blame] | 686 | DIVariable &Cleansed) { |
Devang Patel | bb23a4a | 2011-08-10 21:50:54 +0000 | [diff] [blame] | 687 | LLVMContext &Ctx = DV->getContext(); |
| 688 | // More then one inlined variable corresponds to one abstract variable. |
David Blaikie | 36408e7 | 2014-06-04 23:50:52 +0000 | [diff] [blame] | 689 | // FIXME: This duplication of variables when inlining should probably be |
| 690 | // removed. It's done to allow each DIVariable to describe its location |
| 691 | // because the DebugLoc on the dbg.value/declare isn't accurate. We should |
| 692 | // make it accurate then remove this duplication/cleansing stuff. |
| 693 | Cleansed = cleanseInlinedVariable(DV, Ctx); |
| 694 | auto I = AbstractVariables.find(Cleansed); |
David Blaikie | 825bdd2 | 2014-05-21 22:41:17 +0000 | [diff] [blame] | 695 | if (I != AbstractVariables.end()) |
| 696 | return I->second.get(); |
David Blaikie | 36408e7 | 2014-06-04 23:50:52 +0000 | [diff] [blame] | 697 | return nullptr; |
| 698 | } |
Devang Patel | f6eeaeb | 2009-11-10 23:06:00 +0000 | [diff] [blame] | 699 | |
David Blaikie | e847f13 | 2014-06-13 22:35:44 +0000 | [diff] [blame] | 700 | DbgVariable *DwarfDebug::getExistingAbstractVariable(const DIVariable &DV) { |
| 701 | DIVariable Cleansed; |
| 702 | return getExistingAbstractVariable(DV, Cleansed); |
| 703 | } |
| 704 | |
David Blaikie | 6f9e867 | 2014-06-13 23:52:55 +0000 | [diff] [blame] | 705 | void DwarfDebug::createAbstractVariable(const DIVariable &Var, |
| 706 | LexicalScope *Scope) { |
Adrian Prantl | 87b7eb9 | 2014-10-01 18:55:02 +0000 | [diff] [blame] | 707 | auto AbsDbgVariable = make_unique<DbgVariable>(Var, DIExpression(), this); |
David Blaikie | f4c504e | 2014-10-24 00:43:47 +0000 | [diff] [blame] | 708 | InfoHolder.addScopeVariable(Scope, AbsDbgVariable.get()); |
David Blaikie | 6f9e867 | 2014-06-13 23:52:55 +0000 | [diff] [blame] | 709 | AbstractVariables[Var] = std::move(AbsDbgVariable); |
Devang Patel | f6eeaeb | 2009-11-10 23:06:00 +0000 | [diff] [blame] | 710 | } |
| 711 | |
David Blaikie | 6f9e867 | 2014-06-13 23:52:55 +0000 | [diff] [blame] | 712 | void DwarfDebug::ensureAbstractVariableIsCreated(const DIVariable &DV, |
| 713 | const MDNode *ScopeNode) { |
David Blaikie | 36408e7 | 2014-06-04 23:50:52 +0000 | [diff] [blame] | 714 | DIVariable Cleansed = DV; |
David Blaikie | 6f9e867 | 2014-06-13 23:52:55 +0000 | [diff] [blame] | 715 | if (getExistingAbstractVariable(DV, Cleansed)) |
| 716 | return; |
David Blaikie | 36408e7 | 2014-06-04 23:50:52 +0000 | [diff] [blame] | 717 | |
David Blaikie | 6f9e867 | 2014-06-13 23:52:55 +0000 | [diff] [blame] | 718 | createAbstractVariable(Cleansed, LScopes.getOrCreateAbstractScope(ScopeNode)); |
David Blaikie | 36408e7 | 2014-06-04 23:50:52 +0000 | [diff] [blame] | 719 | } |
| 720 | |
David Blaikie | 6f9e867 | 2014-06-13 23:52:55 +0000 | [diff] [blame] | 721 | void |
| 722 | DwarfDebug::ensureAbstractVariableIsCreatedIfScoped(const DIVariable &DV, |
| 723 | const MDNode *ScopeNode) { |
David Blaikie | 36408e7 | 2014-06-04 23:50:52 +0000 | [diff] [blame] | 724 | DIVariable Cleansed = DV; |
David Blaikie | 6f9e867 | 2014-06-13 23:52:55 +0000 | [diff] [blame] | 725 | if (getExistingAbstractVariable(DV, Cleansed)) |
| 726 | return; |
David Blaikie | 36408e7 | 2014-06-04 23:50:52 +0000 | [diff] [blame] | 727 | |
| 728 | if (LexicalScope *Scope = LScopes.findAbstractScope(ScopeNode)) |
David Blaikie | 6f9e867 | 2014-06-13 23:52:55 +0000 | [diff] [blame] | 729 | createAbstractVariable(Cleansed, Scope); |
David Blaikie | 36408e7 | 2014-06-04 23:50:52 +0000 | [diff] [blame] | 730 | } |
| 731 | |
Eric Christopher | acdcbdb | 2012-11-27 22:43:45 +0000 | [diff] [blame] | 732 | // Collect variable information from side table maintained by MMI. |
Eric Christopher | b4bef6d | 2013-11-19 09:04:36 +0000 | [diff] [blame] | 733 | void DwarfDebug::collectVariableInfoFromMMITable( |
Craig Topper | 71b7b68 | 2014-08-21 05:55:13 +0000 | [diff] [blame] | 734 | SmallPtrSetImpl<const MDNode *> &Processed) { |
Benjamin Kramer | 15596c7 | 2014-03-07 19:09:39 +0000 | [diff] [blame] | 735 | for (const auto &VI : MMI->getVariableDbgInfo()) { |
Benjamin Kramer | 2abfd6c7 | 2014-03-09 15:44:39 +0000 | [diff] [blame] | 736 | if (!VI.Var) |
Eric Christopher | b4bef6d | 2013-11-19 09:04:36 +0000 | [diff] [blame] | 737 | continue; |
Benjamin Kramer | 2abfd6c7 | 2014-03-09 15:44:39 +0000 | [diff] [blame] | 738 | Processed.insert(VI.Var); |
Benjamin Kramer | 2abfd6c7 | 2014-03-09 15:44:39 +0000 | [diff] [blame] | 739 | LexicalScope *Scope = LScopes.findLexicalScope(VI.Loc); |
Jim Grosbach | a8683bb | 2010-07-21 21:21:52 +0000 | [diff] [blame] | 740 | |
Devang Patel | cdb7d44 | 2009-11-10 23:20:04 +0000 | [diff] [blame] | 741 | // If variable scope is not found then skip this variable. |
Craig Topper | 353eda4 | 2014-04-24 06:44:33 +0000 | [diff] [blame] | 742 | if (!Scope) |
Devang Patel | cdb7d44 | 2009-11-10 23:20:04 +0000 | [diff] [blame] | 743 | continue; |
Devang Patel | f6eeaeb | 2009-11-10 23:06:00 +0000 | [diff] [blame] | 744 | |
David Blaikie | ff468a5 | 2014-10-28 02:57:26 +0000 | [diff] [blame] | 745 | DIVariable DV(VI.Var); |
| 746 | DIExpression Expr(VI.Expr); |
David Blaikie | 6f9e867 | 2014-06-13 23:52:55 +0000 | [diff] [blame] | 747 | ensureAbstractVariableIsCreatedIfScoped(DV, Scope->getScopeNode()); |
Adrian Prantl | ca7e470 | 2015-02-10 23:18:28 +0000 | [diff] [blame] | 748 | auto RegVar = make_unique<DbgVariable>(DV, Expr, this, VI.Slot); |
| 749 | if (InfoHolder.addScopeVariable(Scope, RegVar.get())) |
| 750 | ConcreteVariables.push_back(std::move(RegVar)); |
Devang Patel | 475d32a | 2009-10-06 01:26:37 +0000 | [diff] [blame] | 751 | } |
Devang Patel | 490c8ab | 2010-05-20 19:57:06 +0000 | [diff] [blame] | 752 | } |
Devang Patel | a3e9c9c | 2010-03-15 18:33:46 +0000 | [diff] [blame] | 753 | |
Eric Christopher | acdcbdb | 2012-11-27 22:43:45 +0000 | [diff] [blame] | 754 | // Get .debug_loc entry for the instruction range starting at MI. |
Adrian Prantl | e19e5ef | 2014-04-27 18:25:40 +0000 | [diff] [blame] | 755 | static DebugLocEntry::Value getDebugLocValue(const MachineInstr *MI) { |
Adrian Prantl | 87b7eb9 | 2014-10-01 18:55:02 +0000 | [diff] [blame] | 756 | const MDNode *Expr = MI->getDebugExpression(); |
Adrian Prantl | 7f48777 | 2014-04-10 17:39:48 +0000 | [diff] [blame] | 757 | const MDNode *Var = MI->getDebugVariable(); |
Devang Patel | 2442a89 | 2011-07-08 17:09:57 +0000 | [diff] [blame] | 758 | |
Adrian Prantl | 87b7eb9 | 2014-10-01 18:55:02 +0000 | [diff] [blame] | 759 | assert(MI->getNumOperands() == 4); |
Adrian Prantl | 418d1d1 | 2013-07-09 20:28:37 +0000 | [diff] [blame] | 760 | if (MI->getOperand(0).isReg()) { |
Devang Patel | 2442a89 | 2011-07-08 17:09:57 +0000 | [diff] [blame] | 761 | MachineLocation MLoc; |
Adrian Prantl | 418d1d1 | 2013-07-09 20:28:37 +0000 | [diff] [blame] | 762 | // If the second operand is an immediate, this is a |
| 763 | // register-indirect address. |
| 764 | if (!MI->getOperand(1).isImm()) |
Adrian Prantl | d4c0dd4 | 2013-04-26 21:57:17 +0000 | [diff] [blame] | 765 | MLoc.set(MI->getOperand(0).getReg()); |
| 766 | else |
| 767 | MLoc.set(MI->getOperand(0).getReg(), MI->getOperand(1).getImm()); |
Adrian Prantl | 87b7eb9 | 2014-10-01 18:55:02 +0000 | [diff] [blame] | 768 | return DebugLocEntry::Value(Var, Expr, MLoc); |
Devang Patel | 2442a89 | 2011-07-08 17:09:57 +0000 | [diff] [blame] | 769 | } |
| 770 | if (MI->getOperand(0).isImm()) |
Adrian Prantl | 87b7eb9 | 2014-10-01 18:55:02 +0000 | [diff] [blame] | 771 | return DebugLocEntry::Value(Var, Expr, MI->getOperand(0).getImm()); |
Devang Patel | 2442a89 | 2011-07-08 17:09:57 +0000 | [diff] [blame] | 772 | if (MI->getOperand(0).isFPImm()) |
Adrian Prantl | 87b7eb9 | 2014-10-01 18:55:02 +0000 | [diff] [blame] | 773 | return DebugLocEntry::Value(Var, Expr, MI->getOperand(0).getFPImm()); |
Devang Patel | 2442a89 | 2011-07-08 17:09:57 +0000 | [diff] [blame] | 774 | if (MI->getOperand(0).isCImm()) |
Adrian Prantl | 87b7eb9 | 2014-10-01 18:55:02 +0000 | [diff] [blame] | 775 | return DebugLocEntry::Value(Var, Expr, MI->getOperand(0).getCImm()); |
Devang Patel | 2442a89 | 2011-07-08 17:09:57 +0000 | [diff] [blame] | 776 | |
Adrian Prantl | 87b7eb9 | 2014-10-01 18:55:02 +0000 | [diff] [blame] | 777 | llvm_unreachable("Unexpected 4-operand DBG_VALUE instruction!"); |
Devang Patel | 2442a89 | 2011-07-08 17:09:57 +0000 | [diff] [blame] | 778 | } |
| 779 | |
Adrian Prantl | b141683 | 2014-08-01 22:11:58 +0000 | [diff] [blame] | 780 | /// Determine whether two variable pieces overlap. |
Adrian Prantl | 87b7eb9 | 2014-10-01 18:55:02 +0000 | [diff] [blame] | 781 | static bool piecesOverlap(DIExpression P1, DIExpression P2) { |
Adrian Prantl | 27bd01f | 2015-02-09 23:57:15 +0000 | [diff] [blame] | 782 | if (!P1.isBitPiece() || !P2.isBitPiece()) |
Adrian Prantl | b141683 | 2014-08-01 22:11:58 +0000 | [diff] [blame] | 783 | return true; |
Adrian Prantl | 27bd01f | 2015-02-09 23:57:15 +0000 | [diff] [blame] | 784 | unsigned l1 = P1.getBitPieceOffset(); |
| 785 | unsigned l2 = P2.getBitPieceOffset(); |
| 786 | unsigned r1 = l1 + P1.getBitPieceSize(); |
| 787 | unsigned r2 = l2 + P2.getBitPieceSize(); |
Adrian Prantl | b141683 | 2014-08-01 22:11:58 +0000 | [diff] [blame] | 788 | // True where [l1,r1[ and [r1,r2[ overlap. |
| 789 | return (l1 < r2) && (l2 < r1); |
| 790 | } |
| 791 | |
| 792 | /// Build the location list for all DBG_VALUEs in the function that |
| 793 | /// describe the same variable. If the ranges of several independent |
| 794 | /// pieces of the same variable overlap partially, split them up and |
| 795 | /// combine the ranges. The resulting DebugLocEntries are will have |
| 796 | /// strict monotonically increasing begin addresses and will never |
| 797 | /// overlap. |
| 798 | // |
| 799 | // Input: |
| 800 | // |
| 801 | // Ranges History [var, loc, piece ofs size] |
| 802 | // 0 | [x, (reg0, piece 0, 32)] |
| 803 | // 1 | | [x, (reg1, piece 32, 32)] <- IsPieceOfPrevEntry |
| 804 | // 2 | | ... |
| 805 | // 3 | [clobber reg0] |
Eric Christopher | ffc5ff3 | 2015-02-17 20:02:28 +0000 | [diff] [blame] | 806 | // 4 [x, (mem, piece 0, 64)] <- overlapping with both previous pieces of |
| 807 | // x. |
Adrian Prantl | b141683 | 2014-08-01 22:11:58 +0000 | [diff] [blame] | 808 | // |
| 809 | // Output: |
| 810 | // |
| 811 | // [0-1] [x, (reg0, piece 0, 32)] |
| 812 | // [1-3] [x, (reg0, piece 0, 32), (reg1, piece 32, 32)] |
| 813 | // [3-4] [x, (reg1, piece 32, 32)] |
| 814 | // [4- ] [x, (mem, piece 0, 64)] |
David Blaikie | e1a26a6 | 2014-08-05 23:14:16 +0000 | [diff] [blame] | 815 | void |
| 816 | DwarfDebug::buildLocationList(SmallVectorImpl<DebugLocEntry> &DebugLoc, |
| 817 | const DbgValueHistoryMap::InstrRanges &Ranges) { |
Adrian Prantl | caaf053 | 2014-08-11 21:05:57 +0000 | [diff] [blame] | 818 | SmallVector<DebugLocEntry::Value, 4> OpenRanges; |
Adrian Prantl | b141683 | 2014-08-01 22:11:58 +0000 | [diff] [blame] | 819 | |
| 820 | for (auto I = Ranges.begin(), E = Ranges.end(); I != E; ++I) { |
| 821 | const MachineInstr *Begin = I->first; |
| 822 | const MachineInstr *End = I->second; |
| 823 | assert(Begin->isDebugValue() && "Invalid History entry"); |
| 824 | |
| 825 | // Check if a variable is inaccessible in this range. |
Adrian Prantl | 5e1fa85 | 2014-08-12 21:55:58 +0000 | [diff] [blame] | 826 | if (Begin->getNumOperands() > 1 && |
| 827 | Begin->getOperand(0).isReg() && !Begin->getOperand(0).getReg()) { |
Adrian Prantl | b141683 | 2014-08-01 22:11:58 +0000 | [diff] [blame] | 828 | OpenRanges.clear(); |
| 829 | continue; |
| 830 | } |
| 831 | |
| 832 | // If this piece overlaps with any open ranges, truncate them. |
Adrian Prantl | 87b7eb9 | 2014-10-01 18:55:02 +0000 | [diff] [blame] | 833 | DIExpression DIExpr = Begin->getDebugExpression(); |
Adrian Prantl | caaf053 | 2014-08-11 21:05:57 +0000 | [diff] [blame] | 834 | auto Last = std::remove_if(OpenRanges.begin(), OpenRanges.end(), |
Adrian Prantl | 76502d8 | 2014-08-11 23:22:59 +0000 | [diff] [blame] | 835 | [&](DebugLocEntry::Value R) { |
Adrian Prantl | 87b7eb9 | 2014-10-01 18:55:02 +0000 | [diff] [blame] | 836 | return piecesOverlap(DIExpr, R.getExpression()); |
| 837 | }); |
Adrian Prantl | b141683 | 2014-08-01 22:11:58 +0000 | [diff] [blame] | 838 | OpenRanges.erase(Last, OpenRanges.end()); |
| 839 | |
| 840 | const MCSymbol *StartLabel = getLabelBeforeInsn(Begin); |
| 841 | assert(StartLabel && "Forgot label before DBG_VALUE starting a range!"); |
| 842 | |
| 843 | const MCSymbol *EndLabel; |
| 844 | if (End != nullptr) |
| 845 | EndLabel = getLabelAfterInsn(End); |
| 846 | else if (std::next(I) == Ranges.end()) |
Rafael Espindola | 07c03d3 | 2015-03-05 02:05:42 +0000 | [diff] [blame] | 847 | EndLabel = Asm->getFunctionEnd(); |
Adrian Prantl | b141683 | 2014-08-01 22:11:58 +0000 | [diff] [blame] | 848 | else |
| 849 | EndLabel = getLabelBeforeInsn(std::next(I)->first); |
| 850 | assert(EndLabel && "Forgot label after instruction ending a range!"); |
| 851 | |
| 852 | DEBUG(dbgs() << "DotDebugLoc: " << *Begin << "\n"); |
| 853 | |
| 854 | auto Value = getDebugLocValue(Begin); |
David Blaikie | e1a26a6 | 2014-08-05 23:14:16 +0000 | [diff] [blame] | 855 | DebugLocEntry Loc(StartLabel, EndLabel, Value); |
Adrian Prantl | e09ee3f | 2014-08-11 20:59:28 +0000 | [diff] [blame] | 856 | bool couldMerge = false; |
| 857 | |
| 858 | // If this is a piece, it may belong to the current DebugLocEntry. |
Adrian Prantl | 27bd01f | 2015-02-09 23:57:15 +0000 | [diff] [blame] | 859 | if (DIExpr.isBitPiece()) { |
Adrian Prantl | e09ee3f | 2014-08-11 20:59:28 +0000 | [diff] [blame] | 860 | // Add this value to the list of open ranges. |
Adrian Prantl | caaf053 | 2014-08-11 21:05:57 +0000 | [diff] [blame] | 861 | OpenRanges.push_back(Value); |
Adrian Prantl | e09ee3f | 2014-08-11 20:59:28 +0000 | [diff] [blame] | 862 | |
| 863 | // Attempt to add the piece to the last entry. |
| 864 | if (!DebugLoc.empty()) |
| 865 | if (DebugLoc.back().MergeValues(Loc)) |
| 866 | couldMerge = true; |
| 867 | } |
| 868 | |
| 869 | if (!couldMerge) { |
| 870 | // Need to add a new DebugLocEntry. Add all values from still |
| 871 | // valid non-overlapping pieces. |
Adrian Prantl | 1c6f2ec | 2014-08-11 21:06:00 +0000 | [diff] [blame] | 872 | if (OpenRanges.size()) |
| 873 | Loc.addValues(OpenRanges); |
| 874 | |
Adrian Prantl | b141683 | 2014-08-01 22:11:58 +0000 | [diff] [blame] | 875 | DebugLoc.push_back(std::move(Loc)); |
| 876 | } |
Adrian Prantl | e09ee3f | 2014-08-11 20:59:28 +0000 | [diff] [blame] | 877 | |
| 878 | // Attempt to coalesce the ranges of two otherwise identical |
| 879 | // DebugLocEntries. |
| 880 | auto CurEntry = DebugLoc.rbegin(); |
| 881 | auto PrevEntry = std::next(CurEntry); |
| 882 | if (PrevEntry != DebugLoc.rend() && PrevEntry->MergeRanges(*CurEntry)) |
| 883 | DebugLoc.pop_back(); |
Adrian Prantl | b141683 | 2014-08-01 22:11:58 +0000 | [diff] [blame] | 884 | |
Adrian Prantl | 87b7eb9 | 2014-10-01 18:55:02 +0000 | [diff] [blame] | 885 | DEBUG({ |
| 886 | dbgs() << CurEntry->getValues().size() << " Values:\n"; |
| 887 | for (auto Value : CurEntry->getValues()) { |
| 888 | Value.getVariable()->dump(); |
| 889 | Value.getExpression()->dump(); |
| 890 | } |
| 891 | dbgs() << "-----\n"; |
| 892 | }); |
Adrian Prantl | b141683 | 2014-08-01 22:11:58 +0000 | [diff] [blame] | 893 | } |
| 894 | } |
| 895 | |
| 896 | |
Eric Christopher | acdcbdb | 2012-11-27 22:43:45 +0000 | [diff] [blame] | 897 | // Find variables for each lexical scope. |
Jim Grosbach | a8683bb | 2010-07-21 21:21:52 +0000 | [diff] [blame] | 898 | void |
David Blaikie | 263a008 | 2014-10-23 00:06:27 +0000 | [diff] [blame] | 899 | DwarfDebug::collectVariableInfo(DwarfCompileUnit &TheCU, DISubprogram SP, |
| 900 | SmallPtrSetImpl<const MDNode *> &Processed) { |
Eric Christopher | 270a12c | 2013-07-03 21:37:03 +0000 | [diff] [blame] | 901 | // Grab the variable info that was squirreled away in the MMI side-table. |
Timur Iskhodzhanov | 1cd1444 | 2013-12-03 15:10:23 +0000 | [diff] [blame] | 902 | collectVariableInfoFromMMITable(Processed); |
Devang Patel | 490c8ab | 2010-05-20 19:57:06 +0000 | [diff] [blame] | 903 | |
Alexey Samsonov | 0436caa | 2014-04-30 23:02:40 +0000 | [diff] [blame] | 904 | for (const auto &I : DbgValues) { |
| 905 | DIVariable DV(I.first); |
| 906 | if (Processed.count(DV)) |
Devang Patel | 490c8ab | 2010-05-20 19:57:06 +0000 | [diff] [blame] | 907 | continue; |
| 908 | |
Alexey Samsonov | bb2990d | 2014-05-27 23:09:50 +0000 | [diff] [blame] | 909 | // Instruction ranges, specifying where DV is accessible. |
| 910 | const auto &Ranges = I.second; |
| 911 | if (Ranges.empty()) |
Jakob Stoklund Olesen | 9a624fa | 2011-03-26 02:19:36 +0000 | [diff] [blame] | 912 | continue; |
Devang Patel | 9fc1170 | 2010-05-25 23:40:22 +0000 | [diff] [blame] | 913 | |
Craig Topper | 353eda4 | 2014-04-24 06:44:33 +0000 | [diff] [blame] | 914 | LexicalScope *Scope = nullptr; |
Duncan P. N. Exon Smith | b474937 | 2015-02-17 00:02:27 +0000 | [diff] [blame] | 915 | if (MDNode *IA = DV.getInlinedAt()) |
| 916 | Scope = LScopes.findInlinedScope(DV.getContext(), IA); |
| 917 | else |
David Blaikie | 9b8c8cd | 2014-05-14 01:08:28 +0000 | [diff] [blame] | 918 | Scope = LScopes.findLexicalScope(DV.getContext()); |
Devang Patel | 490c8ab | 2010-05-20 19:57:06 +0000 | [diff] [blame] | 919 | // If variable scope is not found then skip this variable. |
Devang Patel | fbd6c45 | 2010-05-21 00:10:20 +0000 | [diff] [blame] | 920 | if (!Scope) |
Devang Patel | 490c8ab | 2010-05-20 19:57:06 +0000 | [diff] [blame] | 921 | continue; |
| 922 | |
Adrian Prantl | 87b7eb9 | 2014-10-01 18:55:02 +0000 | [diff] [blame] | 923 | Processed.insert(DV); |
Alexey Samsonov | bb2990d | 2014-05-27 23:09:50 +0000 | [diff] [blame] | 924 | const MachineInstr *MInsn = Ranges.front().first; |
Jakob Stoklund Olesen | 9a624fa | 2011-03-26 02:19:36 +0000 | [diff] [blame] | 925 | assert(MInsn->isDebugValue() && "History must begin with debug value"); |
David Blaikie | 6f9e867 | 2014-06-13 23:52:55 +0000 | [diff] [blame] | 926 | ensureAbstractVariableIsCreatedIfScoped(DV, Scope->getScopeNode()); |
| 927 | ConcreteVariables.push_back(make_unique<DbgVariable>(MInsn, this)); |
David Blaikie | eb1a272 | 2014-06-13 22:18:23 +0000 | [diff] [blame] | 928 | DbgVariable *RegVar = ConcreteVariables.back().get(); |
David Blaikie | f4c504e | 2014-10-24 00:43:47 +0000 | [diff] [blame] | 929 | InfoHolder.addScopeVariable(Scope, RegVar); |
Jakob Stoklund Olesen | 9a624fa | 2011-03-26 02:19:36 +0000 | [diff] [blame] | 930 | |
Alexey Samsonov | bb2990d | 2014-05-27 23:09:50 +0000 | [diff] [blame] | 931 | // Check if the first DBG_VALUE is valid for the rest of the function. |
Adrian Prantl | c119754 | 2014-05-30 21:10:13 +0000 | [diff] [blame] | 932 | if (Ranges.size() == 1 && Ranges.front().second == nullptr) |
Devang Patel | 9fc1170 | 2010-05-25 23:40:22 +0000 | [diff] [blame] | 933 | continue; |
Devang Patel | 9fc1170 | 2010-05-25 23:40:22 +0000 | [diff] [blame] | 934 | |
Eric Christopher | 59cc071 | 2013-01-28 17:33:26 +0000 | [diff] [blame] | 935 | // Handle multiple DBG_VALUE instructions describing one variable. |
David Blaikie | afd2c6b | 2014-04-22 05:41:06 +0000 | [diff] [blame] | 936 | RegVar->setDotDebugLocOffset(DotDebugLocEntries.size()); |
Jakob Stoklund Olesen | ec0ac3c | 2011-03-22 22:33:08 +0000 | [diff] [blame] | 937 | |
David Blaikie | 0a456de | 2014-04-02 01:43:18 +0000 | [diff] [blame] | 938 | DotDebugLocEntries.resize(DotDebugLocEntries.size() + 1); |
| 939 | DebugLocList &LocList = DotDebugLocEntries.back(); |
David Blaikie | 263a008 | 2014-10-23 00:06:27 +0000 | [diff] [blame] | 940 | LocList.CU = &TheCU; |
David Blaikie | 0a456de | 2014-04-02 01:43:18 +0000 | [diff] [blame] | 941 | LocList.Label = |
| 942 | Asm->GetTempSymbol("debug_loc", DotDebugLocEntries.size() - 1); |
Jakob Stoklund Olesen | 9c057ee | 2011-03-22 00:21:41 +0000 | [diff] [blame] | 943 | |
Adrian Prantl | b141683 | 2014-08-01 22:11:58 +0000 | [diff] [blame] | 944 | // Build the location list for this variable. |
David Blaikie | e1a26a6 | 2014-08-05 23:14:16 +0000 | [diff] [blame] | 945 | buildLocationList(LocList.List, Ranges); |
Adrian Prantl | 92da14b | 2015-03-02 22:02:33 +0000 | [diff] [blame] | 946 | // Finalize the entry by lowering it into a DWARF bytestream. |
| 947 | for (auto &Entry : LocList.List) |
| 948 | Entry.finalize(*Asm, TypeIdentifierMap); |
Devang Patel | a3e9c9c | 2010-03-15 18:33:46 +0000 | [diff] [blame] | 949 | } |
Devang Patel | e0a94bf | 2010-05-14 21:01:35 +0000 | [diff] [blame] | 950 | |
| 951 | // Collect info for variables that were optimized out. |
David Blaikie | 263a008 | 2014-10-23 00:06:27 +0000 | [diff] [blame] | 952 | DIArray Variables = SP.getVariables(); |
Devang Patel | 59e27c5 | 2011-08-19 23:28:12 +0000 | [diff] [blame] | 953 | for (unsigned i = 0, e = Variables.getNumElements(); i != e; ++i) { |
| 954 | DIVariable DV(Variables.getElement(i)); |
David Blaikie | 9ba7254 | 2014-05-14 21:52:46 +0000 | [diff] [blame] | 955 | assert(DV.isVariable()); |
David Blaikie | 70573dc | 2014-11-19 07:49:26 +0000 | [diff] [blame] | 956 | if (!Processed.insert(DV).second) |
Devang Patel | 59e27c5 | 2011-08-19 23:28:12 +0000 | [diff] [blame] | 957 | continue; |
David Blaikie | bb6a4e2 | 2014-06-05 00:51:35 +0000 | [diff] [blame] | 958 | if (LexicalScope *Scope = LScopes.findLexicalScope(DV.getContext())) { |
David Blaikie | 6f9e867 | 2014-06-13 23:52:55 +0000 | [diff] [blame] | 959 | ensureAbstractVariableIsCreatedIfScoped(DV, Scope->getScopeNode()); |
Adrian Prantl | 87b7eb9 | 2014-10-01 18:55:02 +0000 | [diff] [blame] | 960 | DIExpression NoExpr; |
| 961 | ConcreteVariables.push_back(make_unique<DbgVariable>(DV, NoExpr, this)); |
David Blaikie | f4c504e | 2014-10-24 00:43:47 +0000 | [diff] [blame] | 962 | InfoHolder.addScopeVariable(Scope, ConcreteVariables.back().get()); |
David Blaikie | bb6a4e2 | 2014-06-05 00:51:35 +0000 | [diff] [blame] | 963 | } |
Devang Patel | e0a94bf | 2010-05-14 21:01:35 +0000 | [diff] [blame] | 964 | } |
Devang Patel | 9fc1170 | 2010-05-25 23:40:22 +0000 | [diff] [blame] | 965 | } |
Devang Patel | e0a94bf | 2010-05-14 21:01:35 +0000 | [diff] [blame] | 966 | |
Eric Christopher | acdcbdb | 2012-11-27 22:43:45 +0000 | [diff] [blame] | 967 | // Return Label preceding the instruction. |
Eric Christopher | 962c908 | 2013-01-15 23:56:56 +0000 | [diff] [blame] | 968 | MCSymbol *DwarfDebug::getLabelBeforeInsn(const MachineInstr *MI) { |
Jakob Stoklund Olesen | 9a624fa | 2011-03-26 02:19:36 +0000 | [diff] [blame] | 969 | MCSymbol *Label = LabelsBeforeInsn.lookup(MI); |
| 970 | assert(Label && "Didn't insert label before instruction"); |
| 971 | return Label; |
Devang Patel | 9fc1170 | 2010-05-25 23:40:22 +0000 | [diff] [blame] | 972 | } |
| 973 | |
Eric Christopher | acdcbdb | 2012-11-27 22:43:45 +0000 | [diff] [blame] | 974 | // Return Label immediately following the instruction. |
Eric Christopher | 962c908 | 2013-01-15 23:56:56 +0000 | [diff] [blame] | 975 | MCSymbol *DwarfDebug::getLabelAfterInsn(const MachineInstr *MI) { |
Jakob Stoklund Olesen | 9a624fa | 2011-03-26 02:19:36 +0000 | [diff] [blame] | 976 | return LabelsAfterInsn.lookup(MI); |
Devang Patel | 475d32a | 2009-10-06 01:26:37 +0000 | [diff] [blame] | 977 | } |
| 978 | |
Eric Christopher | acdcbdb | 2012-11-27 22:43:45 +0000 | [diff] [blame] | 979 | // Process beginning of an instruction. |
Devang Patel | b5694e7 | 2010-10-26 17:49:02 +0000 | [diff] [blame] | 980 | void DwarfDebug::beginInstruction(const MachineInstr *MI) { |
Craig Topper | e73658d | 2014-04-28 04:05:08 +0000 | [diff] [blame] | 981 | assert(CurMI == nullptr); |
Timur Iskhodzhanov | 1cd1444 | 2013-12-03 15:10:23 +0000 | [diff] [blame] | 982 | CurMI = MI; |
Jakob Stoklund Olesen | 1886a4c | 2011-03-25 17:20:59 +0000 | [diff] [blame] | 983 | // Check if source location changes, but ignore DBG_VALUE locations. |
| 984 | if (!MI->isDebugValue()) { |
| 985 | DebugLoc DL = MI->getDebugLoc(); |
| 986 | if (DL != PrevInstLoc && (!DL.isUnknown() || UnknownLocations)) { |
Eric Christopher | aec8a82 | 2012-04-05 20:39:05 +0000 | [diff] [blame] | 987 | unsigned Flags = 0; |
Jakob Stoklund Olesen | 1886a4c | 2011-03-25 17:20:59 +0000 | [diff] [blame] | 988 | PrevInstLoc = DL; |
Devang Patel | 34a6620 | 2011-05-11 19:22:19 +0000 | [diff] [blame] | 989 | if (DL == PrologEndLoc) { |
| 990 | Flags |= DWARF2_FLAG_PROLOGUE_END; |
| 991 | PrologEndLoc = DebugLoc(); |
David Blaikie | aeaa5bf | 2014-12-30 22:47:13 +0000 | [diff] [blame] | 992 | Flags |= DWARF2_FLAG_IS_STMT; |
Devang Patel | 34a6620 | 2011-05-11 19:22:19 +0000 | [diff] [blame] | 993 | } |
David Blaikie | aeaa5bf | 2014-12-30 22:47:13 +0000 | [diff] [blame] | 994 | if (DL.getLine() != |
| 995 | Asm->OutStreamer.getContext().getCurrentDwarfLoc().getLine()) |
Eric Christopher | aec8a82 | 2012-04-05 20:39:05 +0000 | [diff] [blame] | 996 | Flags |= DWARF2_FLAG_IS_STMT; |
| 997 | |
Jakob Stoklund Olesen | 1886a4c | 2011-03-25 17:20:59 +0000 | [diff] [blame] | 998 | if (!DL.isUnknown()) { |
| 999 | const MDNode *Scope = DL.getScope(Asm->MF->getFunction()->getContext()); |
Devang Patel | 34a6620 | 2011-05-11 19:22:19 +0000 | [diff] [blame] | 1000 | recordSourceLine(DL.getLine(), DL.getCol(), Scope, Flags); |
Jakob Stoklund Olesen | 1886a4c | 2011-03-25 17:20:59 +0000 | [diff] [blame] | 1001 | } else |
Craig Topper | 353eda4 | 2014-04-24 06:44:33 +0000 | [diff] [blame] | 1002 | recordSourceLine(0, 0, nullptr, 0); |
Jakob Stoklund Olesen | 1886a4c | 2011-03-25 17:20:59 +0000 | [diff] [blame] | 1003 | } |
Devang Patel | 9fc1170 | 2010-05-25 23:40:22 +0000 | [diff] [blame] | 1004 | } |
Devang Patel | 23b2ae6 | 2010-03-29 22:59:58 +0000 | [diff] [blame] | 1005 | |
Jakob Stoklund Olesen | 1886a4c | 2011-03-25 17:20:59 +0000 | [diff] [blame] | 1006 | // Insert labels where requested. |
Eric Christopher | b4bef6d | 2013-11-19 09:04:36 +0000 | [diff] [blame] | 1007 | DenseMap<const MachineInstr *, MCSymbol *>::iterator I = |
| 1008 | LabelsBeforeInsn.find(MI); |
Jakob Stoklund Olesen | 9a624fa | 2011-03-26 02:19:36 +0000 | [diff] [blame] | 1009 | |
| 1010 | // No label needed. |
| 1011 | if (I == LabelsBeforeInsn.end()) |
| 1012 | return; |
| 1013 | |
| 1014 | // Label already assigned. |
| 1015 | if (I->second) |
Devang Patel | 002d54d | 2010-05-26 19:37:24 +0000 | [diff] [blame] | 1016 | return; |
Devang Patel | bd477be | 2010-03-29 17:20:31 +0000 | [diff] [blame] | 1017 | |
Jakob Stoklund Olesen | 1886a4c | 2011-03-25 17:20:59 +0000 | [diff] [blame] | 1018 | if (!PrevLabel) { |
Devang Patel | acc32a5 | 2010-05-26 21:23:46 +0000 | [diff] [blame] | 1019 | PrevLabel = MMI->getContext().CreateTempSymbol(); |
| 1020 | Asm->OutStreamer.EmitLabel(PrevLabel); |
Devang Patel | 002d54d | 2010-05-26 19:37:24 +0000 | [diff] [blame] | 1021 | } |
Jakob Stoklund Olesen | 9a624fa | 2011-03-26 02:19:36 +0000 | [diff] [blame] | 1022 | I->second = PrevLabel; |
Devang Patel | 8db360d | 2009-10-06 01:50:42 +0000 | [diff] [blame] | 1023 | } |
| 1024 | |
Eric Christopher | acdcbdb | 2012-11-27 22:43:45 +0000 | [diff] [blame] | 1025 | // Process end of an instruction. |
Timur Iskhodzhanov | 1cd1444 | 2013-12-03 15:10:23 +0000 | [diff] [blame] | 1026 | void DwarfDebug::endInstruction() { |
Craig Topper | e73658d | 2014-04-28 04:05:08 +0000 | [diff] [blame] | 1027 | assert(CurMI != nullptr); |
Jakob Stoklund Olesen | 1886a4c | 2011-03-25 17:20:59 +0000 | [diff] [blame] | 1028 | // Don't create a new label after DBG_VALUE instructions. |
| 1029 | // They don't generate code. |
Timur Iskhodzhanov | 1cd1444 | 2013-12-03 15:10:23 +0000 | [diff] [blame] | 1030 | if (!CurMI->isDebugValue()) |
Craig Topper | 353eda4 | 2014-04-24 06:44:33 +0000 | [diff] [blame] | 1031 | PrevLabel = nullptr; |
Jakob Stoklund Olesen | 1886a4c | 2011-03-25 17:20:59 +0000 | [diff] [blame] | 1032 | |
Eric Christopher | b4bef6d | 2013-11-19 09:04:36 +0000 | [diff] [blame] | 1033 | DenseMap<const MachineInstr *, MCSymbol *>::iterator I = |
Timur Iskhodzhanov | 1cd1444 | 2013-12-03 15:10:23 +0000 | [diff] [blame] | 1034 | LabelsAfterInsn.find(CurMI); |
Craig Topper | 353eda4 | 2014-04-24 06:44:33 +0000 | [diff] [blame] | 1035 | CurMI = nullptr; |
Jakob Stoklund Olesen | 9a624fa | 2011-03-26 02:19:36 +0000 | [diff] [blame] | 1036 | |
| 1037 | // No label needed. |
| 1038 | if (I == LabelsAfterInsn.end()) |
| 1039 | return; |
| 1040 | |
| 1041 | // Label already assigned. |
| 1042 | if (I->second) |
Jakob Stoklund Olesen | 1886a4c | 2011-03-25 17:20:59 +0000 | [diff] [blame] | 1043 | return; |
| 1044 | |
| 1045 | // We need a label after this instruction. |
| 1046 | if (!PrevLabel) { |
| 1047 | PrevLabel = MMI->getContext().CreateTempSymbol(); |
| 1048 | Asm->OutStreamer.EmitLabel(PrevLabel); |
Devang Patel | 3ebd893 | 2010-04-08 16:50:29 +0000 | [diff] [blame] | 1049 | } |
Jakob Stoklund Olesen | 9a624fa | 2011-03-26 02:19:36 +0000 | [diff] [blame] | 1050 | I->second = PrevLabel; |
Devang Patel | f6eeaeb | 2009-11-10 23:06:00 +0000 | [diff] [blame] | 1051 | } |
| 1052 | |
Eric Christopher | acdcbdb | 2012-11-27 22:43:45 +0000 | [diff] [blame] | 1053 | // Each LexicalScope has first instruction and last instruction to mark |
| 1054 | // beginning and end of a scope respectively. Create an inverse map that list |
| 1055 | // scopes starts (and ends) with an instruction. One instruction may start (or |
| 1056 | // end) multiple scopes. Ignore scopes that are not reachable. |
Devang Patel | 359b013 | 2010-04-08 18:43:56 +0000 | [diff] [blame] | 1057 | void DwarfDebug::identifyScopeMarkers() { |
Devang Patel | 7e62302 | 2011-08-10 20:55:27 +0000 | [diff] [blame] | 1058 | SmallVector<LexicalScope *, 4> WorkList; |
| 1059 | WorkList.push_back(LScopes.getCurrentFunctionScope()); |
Devang Patel | 7771b7c | 2010-01-20 02:05:23 +0000 | [diff] [blame] | 1060 | while (!WorkList.empty()) { |
Devang Patel | 7e62302 | 2011-08-10 20:55:27 +0000 | [diff] [blame] | 1061 | LexicalScope *S = WorkList.pop_back_val(); |
Jim Grosbach | a8683bb | 2010-07-21 21:21:52 +0000 | [diff] [blame] | 1062 | |
Craig Topper | 977e9cd | 2013-07-03 04:24:43 +0000 | [diff] [blame] | 1063 | const SmallVectorImpl<LexicalScope *> &Children = S->getChildren(); |
Jim Grosbach | a8683bb | 2010-07-21 21:21:52 +0000 | [diff] [blame] | 1064 | if (!Children.empty()) |
Benjamin Kramer | 15596c7 | 2014-03-07 19:09:39 +0000 | [diff] [blame] | 1065 | WorkList.append(Children.begin(), Children.end()); |
Devang Patel | 7771b7c | 2010-01-20 02:05:23 +0000 | [diff] [blame] | 1066 | |
Devang Patel | f6eeaeb | 2009-11-10 23:06:00 +0000 | [diff] [blame] | 1067 | if (S->isAbstractScope()) |
| 1068 | continue; |
Jim Grosbach | a8683bb | 2010-07-21 21:21:52 +0000 | [diff] [blame] | 1069 | |
Benjamin Kramer | 15596c7 | 2014-03-07 19:09:39 +0000 | [diff] [blame] | 1070 | for (const InsnRange &R : S->getRanges()) { |
| 1071 | assert(R.first && "InsnRange does not have first instruction!"); |
| 1072 | assert(R.second && "InsnRange does not have second instruction!"); |
| 1073 | requestLabelBeforeInsn(R.first); |
| 1074 | requestLabelAfterInsn(R.second); |
Devang Patel | 6c74a87 | 2010-04-27 19:46:33 +0000 | [diff] [blame] | 1075 | } |
Devang Patel | 75cc16c | 2009-10-01 20:31:14 +0000 | [diff] [blame] | 1076 | } |
Devang Patel | 75cc16c | 2009-10-01 20:31:14 +0000 | [diff] [blame] | 1077 | } |
| 1078 | |
Alexey Samsonov | 8a86d6d | 2014-05-27 22:47:41 +0000 | [diff] [blame] | 1079 | static DebugLoc findPrologueEndLoc(const MachineFunction *MF) { |
| 1080 | // First known non-DBG_VALUE and non-frame setup location marks |
| 1081 | // the beginning of the function body. |
| 1082 | for (const auto &MBB : *MF) |
| 1083 | for (const auto &MI : MBB) |
| 1084 | if (!MI.isDebugValue() && !MI.getFlag(MachineInstr::FrameSetup) && |
Saleem Abdulrasool | fc07c72 | 2015-01-24 20:19:45 +0000 | [diff] [blame] | 1085 | !MI.getDebugLoc().isUnknown()) { |
Adrian Prantl | b9fa945 | 2014-12-16 00:20:49 +0000 | [diff] [blame] | 1086 | // Did the target forget to set the FrameSetup flag for CFI insns? |
| 1087 | assert(!MI.isCFIInstruction() && |
| 1088 | "First non-frame-setup instruction is a CFI instruction."); |
Alexey Samsonov | 8a86d6d | 2014-05-27 22:47:41 +0000 | [diff] [blame] | 1089 | return MI.getDebugLoc(); |
Adrian Prantl | b9fa945 | 2014-12-16 00:20:49 +0000 | [diff] [blame] | 1090 | } |
Alexey Samsonov | 8a86d6d | 2014-05-27 22:47:41 +0000 | [diff] [blame] | 1091 | return DebugLoc(); |
| 1092 | } |
| 1093 | |
Eric Christopher | acdcbdb | 2012-11-27 22:43:45 +0000 | [diff] [blame] | 1094 | // Gather pre-function debug information. Assumes being called immediately |
| 1095 | // after the function entry point has been emitted. |
Chris Lattner | 76555b5 | 2010-01-26 23:18:02 +0000 | [diff] [blame] | 1096 | void DwarfDebug::beginFunction(const MachineFunction *MF) { |
Timur Iskhodzhanov | 1cd1444 | 2013-12-03 15:10:23 +0000 | [diff] [blame] | 1097 | CurFn = MF; |
Eric Christopher | fedfa44 | 2013-11-01 23:14:17 +0000 | [diff] [blame] | 1098 | |
| 1099 | // If there's no debug info for the function we're not going to do anything. |
| 1100 | if (!MMI->hasDebugInfo()) |
| 1101 | return; |
| 1102 | |
David Blaikie | 2f04011 | 2014-07-25 16:10:16 +0000 | [diff] [blame] | 1103 | auto DI = FunctionDIs.find(MF->getFunction()); |
| 1104 | if (DI == FunctionDIs.end()) |
| 1105 | return; |
| 1106 | |
Eric Christopher | fedfa44 | 2013-11-01 23:14:17 +0000 | [diff] [blame] | 1107 | // Grab the lexical scopes for the function, if we don't have any of those |
| 1108 | // then we're not going to be able to do anything. |
Devang Patel | 7e62302 | 2011-08-10 20:55:27 +0000 | [diff] [blame] | 1109 | LScopes.initialize(*MF); |
Eric Christopher | 384f3fe | 2014-03-20 19:16:16 +0000 | [diff] [blame] | 1110 | if (LScopes.empty()) |
Eric Christopher | fedfa44 | 2013-11-01 23:14:17 +0000 | [diff] [blame] | 1111 | return; |
| 1112 | |
Alexey Samsonov | 0436caa | 2014-04-30 23:02:40 +0000 | [diff] [blame] | 1113 | assert(DbgValues.empty() && "DbgValues map wasn't cleaned!"); |
Eric Christopher | fedfa44 | 2013-11-01 23:14:17 +0000 | [diff] [blame] | 1114 | |
| 1115 | // Make sure that each lexical scope will have a begin/end label. |
Devang Patel | 7e62302 | 2011-08-10 20:55:27 +0000 | [diff] [blame] | 1116 | identifyScopeMarkers(); |
Devang Patel | 4598eb6 | 2009-10-06 18:37:31 +0000 | [diff] [blame] | 1117 | |
Eric Christopher | 4287a49 | 2013-12-09 23:57:44 +0000 | [diff] [blame] | 1118 | // Set DwarfDwarfCompileUnitID in MCContext to the Compile Unit this function |
Eric Christopher | fedfa44 | 2013-11-01 23:14:17 +0000 | [diff] [blame] | 1119 | // belongs to so that we add to the correct per-cu line table in the |
| 1120 | // non-asm case. |
Manman Ren | 4e042a6 | 2013-02-05 21:52:47 +0000 | [diff] [blame] | 1121 | LexicalScope *FnScope = LScopes.getCurrentFunctionScope(); |
David Blaikie | 2f04011 | 2014-07-25 16:10:16 +0000 | [diff] [blame] | 1122 | // FnScope->getScopeNode() and DI->second should represent the same function, |
| 1123 | // though they may not be the same MDNode due to inline functions merged in |
| 1124 | // LTO where the debug info metadata still differs (either due to distinct |
| 1125 | // written differences - two versions of a linkonce_odr function |
| 1126 | // written/copied into two separate files, or some sub-optimal metadata that |
| 1127 | // isn't structurally identical (see: file path/name info from clang, which |
| 1128 | // includes the directory of the cpp file being built, even when the file name |
| 1129 | // is absolute (such as an <> lookup header))) |
Eric Christopher | 4287a49 | 2013-12-09 23:57:44 +0000 | [diff] [blame] | 1130 | DwarfCompileUnit *TheCU = SPMap.lookup(FnScope->getScopeNode()); |
Manman Ren | 4e042a6 | 2013-02-05 21:52:47 +0000 | [diff] [blame] | 1131 | assert(TheCU && "Unable to find compile unit!"); |
Rafael Espindola | b4eec1d | 2014-02-05 18:00:21 +0000 | [diff] [blame] | 1132 | if (Asm->OutStreamer.hasRawTextSupport()) |
| 1133 | // Use a single line table if we are generating assembly. |
Manman Ren | 9d4c735 | 2013-05-21 00:57:22 +0000 | [diff] [blame] | 1134 | Asm->OutStreamer.getContext().setDwarfCompileUnitID(0); |
| 1135 | else |
| 1136 | Asm->OutStreamer.getContext().setDwarfCompileUnitID(TheCU->getUniqueID()); |
Manman Ren | 4e042a6 | 2013-02-05 21:52:47 +0000 | [diff] [blame] | 1137 | |
Alexey Samsonov | 414b6fb | 2014-04-30 21:34:11 +0000 | [diff] [blame] | 1138 | // Calculate history for local variables. |
Eric Christopher | d4e723f | 2015-02-20 22:36:11 +0000 | [diff] [blame] | 1139 | calculateDbgValueHistory(MF, Asm->MF->getSubtarget().getRegisterInfo(), |
Eric Christopher | d913448 | 2014-08-04 21:25:23 +0000 | [diff] [blame] | 1140 | DbgValues); |
Alexey Samsonov | 414b6fb | 2014-04-30 21:34:11 +0000 | [diff] [blame] | 1141 | |
| 1142 | // Request labels for the full history. |
Alexey Samsonov | bb2990d | 2014-05-27 23:09:50 +0000 | [diff] [blame] | 1143 | for (const auto &I : DbgValues) { |
| 1144 | const auto &Ranges = I.second; |
| 1145 | if (Ranges.empty()) |
Jakob Stoklund Olesen | 9a624fa | 2011-03-26 02:19:36 +0000 | [diff] [blame] | 1146 | continue; |
| 1147 | |
Rafael Espindola | 07c03d3 | 2015-03-05 02:05:42 +0000 | [diff] [blame] | 1148 | // The first mention of a function argument gets the CurrentFnBegin |
Alexey Samsonov | 414b6fb | 2014-04-30 21:34:11 +0000 | [diff] [blame] | 1149 | // label, so arguments are visible when breaking at function entry. |
Adrian Prantl | 87b7eb9 | 2014-10-01 18:55:02 +0000 | [diff] [blame] | 1150 | DIVariable DIVar(Ranges.front().first->getDebugVariable()); |
| 1151 | if (DIVar.isVariable() && DIVar.getTag() == dwarf::DW_TAG_arg_variable && |
| 1152 | getDISubprogram(DIVar.getContext()).describes(MF->getFunction())) { |
Rafael Espindola | 07c03d3 | 2015-03-05 02:05:42 +0000 | [diff] [blame] | 1153 | LabelsBeforeInsn[Ranges.front().first] = Asm->getFunctionBegin(); |
Adrian Prantl | 27bd01f | 2015-02-09 23:57:15 +0000 | [diff] [blame] | 1154 | if (Ranges.front().first->getDebugExpression().isBitPiece()) { |
Adrian Prantl | b141683 | 2014-08-01 22:11:58 +0000 | [diff] [blame] | 1155 | // Mark all non-overlapping initial pieces. |
| 1156 | for (auto I = Ranges.begin(); I != Ranges.end(); ++I) { |
Adrian Prantl | 87b7eb9 | 2014-10-01 18:55:02 +0000 | [diff] [blame] | 1157 | DIExpression Piece = I->first->getDebugExpression(); |
Adrian Prantl | b141683 | 2014-08-01 22:11:58 +0000 | [diff] [blame] | 1158 | if (std::all_of(Ranges.begin(), I, |
Adrian Prantl | 87b7eb9 | 2014-10-01 18:55:02 +0000 | [diff] [blame] | 1159 | [&](DbgValueHistoryMap::InstrRange Pred) { |
| 1160 | return !piecesOverlap(Piece, Pred.first->getDebugExpression()); |
Adrian Prantl | b141683 | 2014-08-01 22:11:58 +0000 | [diff] [blame] | 1161 | })) |
Rafael Espindola | 07c03d3 | 2015-03-05 02:05:42 +0000 | [diff] [blame] | 1162 | LabelsBeforeInsn[I->first] = Asm->getFunctionBegin(); |
Adrian Prantl | b141683 | 2014-08-01 22:11:58 +0000 | [diff] [blame] | 1163 | else |
| 1164 | break; |
| 1165 | } |
| 1166 | } |
| 1167 | } |
Alexey Samsonov | 414b6fb | 2014-04-30 21:34:11 +0000 | [diff] [blame] | 1168 | |
Alexey Samsonov | bb2990d | 2014-05-27 23:09:50 +0000 | [diff] [blame] | 1169 | for (const auto &Range : Ranges) { |
| 1170 | requestLabelBeforeInsn(Range.first); |
| 1171 | if (Range.second) |
| 1172 | requestLabelAfterInsn(Range.second); |
Jakob Stoklund Olesen | 9a624fa | 2011-03-26 02:19:36 +0000 | [diff] [blame] | 1173 | } |
| 1174 | } |
Devang Patel | 002d54d | 2010-05-26 19:37:24 +0000 | [diff] [blame] | 1175 | |
Jakob Stoklund Olesen | 1886a4c | 2011-03-25 17:20:59 +0000 | [diff] [blame] | 1176 | PrevInstLoc = DebugLoc(); |
Rafael Espindola | 07c03d3 | 2015-03-05 02:05:42 +0000 | [diff] [blame] | 1177 | PrevLabel = Asm->getFunctionBegin(); |
Devang Patel | 34a6620 | 2011-05-11 19:22:19 +0000 | [diff] [blame] | 1178 | |
| 1179 | // Record beginning of function. |
Alexey Samsonov | 8a86d6d | 2014-05-27 22:47:41 +0000 | [diff] [blame] | 1180 | PrologEndLoc = findPrologueEndLoc(MF); |
Devang Patel | 34a6620 | 2011-05-11 19:22:19 +0000 | [diff] [blame] | 1181 | if (!PrologEndLoc.isUnknown()) { |
Eric Christopher | fedfa44 | 2013-11-01 23:14:17 +0000 | [diff] [blame] | 1182 | DebugLoc FnStartDL = |
Timur Iskhodzhanov | f166f6c | 2014-01-30 01:39:17 +0000 | [diff] [blame] | 1183 | PrologEndLoc.getFnDebugLoc(MF->getFunction()->getContext()); |
Saleem Abdulrasool | fc07c72 | 2015-01-24 20:19:45 +0000 | [diff] [blame] | 1184 | |
| 1185 | // We'd like to list the prologue as "not statements" but GDB behaves |
| 1186 | // poorly if we do that. Revisit this with caution/GDB (7.5+) testing. |
| 1187 | recordSourceLine(FnStartDL.getLine(), FnStartDL.getCol(), |
| 1188 | FnStartDL.getScope(MF->getFunction()->getContext()), |
| 1189 | DWARF2_FLAG_IS_STMT); |
Devang Patel | 34a6620 | 2011-05-11 19:22:19 +0000 | [diff] [blame] | 1190 | } |
Bill Wendling | 2b128d7 | 2009-05-20 23:19:06 +0000 | [diff] [blame] | 1191 | } |
| 1192 | |
Eric Christopher | acdcbdb | 2012-11-27 22:43:45 +0000 | [diff] [blame] | 1193 | // Gather and emit post-function debug information. |
NAKAMURA Takumi | b927161 | 2013-12-03 13:15:54 +0000 | [diff] [blame] | 1194 | void DwarfDebug::endFunction(const MachineFunction *MF) { |
David Blaikie | e75f963 | 2014-10-14 17:12:02 +0000 | [diff] [blame] | 1195 | assert(CurFn == MF && |
| 1196 | "endFunction should be called with the same function as beginFunction"); |
Timur Iskhodzhanov | 1cd1444 | 2013-12-03 15:10:23 +0000 | [diff] [blame] | 1197 | |
David Blaikie | 2f04011 | 2014-07-25 16:10:16 +0000 | [diff] [blame] | 1198 | if (!MMI->hasDebugInfo() || LScopes.empty() || |
| 1199 | !FunctionDIs.count(MF->getFunction())) { |
Eric Christopher | 384f3fe | 2014-03-20 19:16:16 +0000 | [diff] [blame] | 1200 | // If we don't have a lexical scope for this function then there will |
| 1201 | // be a hole in the range information. Keep note of this by setting the |
| 1202 | // previously used section to nullptr. |
Eric Christopher | 384f3fe | 2014-03-20 19:16:16 +0000 | [diff] [blame] | 1203 | PrevCU = nullptr; |
Craig Topper | 353eda4 | 2014-04-24 06:44:33 +0000 | [diff] [blame] | 1204 | CurFn = nullptr; |
Eric Christopher | b4bef6d | 2013-11-19 09:04:36 +0000 | [diff] [blame] | 1205 | return; |
Timur Iskhodzhanov | 1cd1444 | 2013-12-03 15:10:23 +0000 | [diff] [blame] | 1206 | } |
Devang Patel | 2904aa9 | 2009-11-12 19:02:56 +0000 | [diff] [blame] | 1207 | |
Eric Christopher | 4287a49 | 2013-12-09 23:57:44 +0000 | [diff] [blame] | 1208 | // Set DwarfDwarfCompileUnitID in MCContext to default value. |
Manman Ren | 4e042a6 | 2013-02-05 21:52:47 +0000 | [diff] [blame] | 1209 | Asm->OutStreamer.getContext().setDwarfCompileUnitID(0); |
Eric Christopher | 6a84138 | 2012-11-19 22:42:10 +0000 | [diff] [blame] | 1210 | |
Devang Patel | 3acc70e | 2011-08-15 22:04:40 +0000 | [diff] [blame] | 1211 | LexicalScope *FnScope = LScopes.getCurrentFunctionScope(); |
David Blaikie | 263a008 | 2014-10-23 00:06:27 +0000 | [diff] [blame] | 1212 | DISubprogram SP(FnScope->getScopeNode()); |
| 1213 | DwarfCompileUnit &TheCU = *SPMap.lookup(SP); |
| 1214 | |
| 1215 | SmallPtrSet<const MDNode *, 16> ProcessedVars; |
| 1216 | collectVariableInfo(TheCU, SP, ProcessedVars); |
Devang Patel | 3acc70e | 2011-08-15 22:04:40 +0000 | [diff] [blame] | 1217 | |
David Blaikie | 3a7ce25 | 2014-09-19 17:03:16 +0000 | [diff] [blame] | 1218 | // Add the range of this function to the list of ranges for the CU. |
Rafael Espindola | 07c03d3 | 2015-03-05 02:05:42 +0000 | [diff] [blame] | 1219 | TheCU.addRange(RangeSpan(Asm->getFunctionBegin(), Asm->getFunctionEnd())); |
David Blaikie | 3a7ce25 | 2014-09-19 17:03:16 +0000 | [diff] [blame] | 1220 | |
| 1221 | // Under -gmlt, skip building the subprogram if there are no inlined |
| 1222 | // subroutines inside it. |
| 1223 | if (TheCU.getCUNode().getEmissionKind() == DIBuilder::LineTablesOnly && |
David Blaikie | e1c7974 | 2014-09-30 21:28:32 +0000 | [diff] [blame] | 1224 | LScopes.getAbstractScopesList().empty() && !IsDarwin) { |
David Blaikie | 80e5b1e | 2014-10-24 17:57:34 +0000 | [diff] [blame] | 1225 | assert(InfoHolder.getScopeVariables().empty()); |
David Blaikie | 3a7ce25 | 2014-09-19 17:03:16 +0000 | [diff] [blame] | 1226 | assert(DbgValues.empty()); |
David Blaikie | 8b2fdb8 | 2014-10-09 18:24:28 +0000 | [diff] [blame] | 1227 | // FIXME: This wouldn't be true in LTO with a -g (with inlining) CU followed |
| 1228 | // by a -gmlt CU. Add a test and remove this assertion. |
David Blaikie | 3a7ce25 | 2014-09-19 17:03:16 +0000 | [diff] [blame] | 1229 | assert(AbstractVariables.empty()); |
| 1230 | LabelsBeforeInsn.clear(); |
| 1231 | LabelsAfterInsn.clear(); |
| 1232 | PrevLabel = nullptr; |
| 1233 | CurFn = nullptr; |
| 1234 | return; |
| 1235 | } |
| 1236 | |
Adrian Prantl | 049d21c | 2014-10-13 20:44:58 +0000 | [diff] [blame] | 1237 | #ifndef NDEBUG |
| 1238 | size_t NumAbstractScopes = LScopes.getAbstractScopesList().size(); |
| 1239 | #endif |
Devang Patel | 7e62302 | 2011-08-10 20:55:27 +0000 | [diff] [blame] | 1240 | // Construct abstract scopes. |
Benjamin Kramer | 15596c7 | 2014-03-07 19:09:39 +0000 | [diff] [blame] | 1241 | for (LexicalScope *AScope : LScopes.getAbstractScopesList()) { |
Devang Patel | 4440347 | 2011-08-12 18:10:19 +0000 | [diff] [blame] | 1242 | DISubprogram SP(AScope->getScopeNode()); |
David Blaikie | db5371b | 2014-07-18 22:26:59 +0000 | [diff] [blame] | 1243 | assert(SP.isSubprogram()); |
David Blaikie | 4abe19e | 2014-05-12 18:23:35 +0000 | [diff] [blame] | 1244 | // Collect info for variables that were optimized out. |
| 1245 | DIArray Variables = SP.getVariables(); |
| 1246 | for (unsigned i = 0, e = Variables.getNumElements(); i != e; ++i) { |
| 1247 | DIVariable DV(Variables.getElement(i)); |
| 1248 | assert(DV && DV.isVariable()); |
David Blaikie | 70573dc | 2014-11-19 07:49:26 +0000 | [diff] [blame] | 1249 | if (!ProcessedVars.insert(DV).second) |
David Blaikie | 4abe19e | 2014-05-12 18:23:35 +0000 | [diff] [blame] | 1250 | continue; |
David Blaikie | 6f9e867 | 2014-06-13 23:52:55 +0000 | [diff] [blame] | 1251 | ensureAbstractVariableIsCreated(DV, DV.getContext()); |
Adrian Prantl | 049d21c | 2014-10-13 20:44:58 +0000 | [diff] [blame] | 1252 | assert(LScopes.getAbstractScopesList().size() == NumAbstractScopes |
| 1253 | && "ensureAbstractVariableIsCreated inserted abstract scopes"); |
Devang Patel | 5c0f85c | 2010-06-25 22:07:34 +0000 | [diff] [blame] | 1254 | } |
David Blaikie | 73cc705 | 2014-10-09 20:36:27 +0000 | [diff] [blame] | 1255 | constructAbstractSubprogramScopeDIE(AScope); |
Bill Wendling | 2b128d7 | 2009-05-20 23:19:06 +0000 | [diff] [blame] | 1256 | } |
Eric Christopher | 6a84138 | 2012-11-19 22:42:10 +0000 | [diff] [blame] | 1257 | |
David Blaikie | 1d07234 | 2014-10-09 20:21:36 +0000 | [diff] [blame] | 1258 | TheCU.constructSubprogramScopeDIE(FnScope); |
David Blaikie | 3a443c2 | 2014-11-04 22:12:25 +0000 | [diff] [blame] | 1259 | if (auto *SkelCU = TheCU.getSkeleton()) |
| 1260 | if (!LScopes.getAbstractScopesList().empty()) |
| 1261 | SkelCU->constructSubprogramScopeDIE(FnScope); |
Devang Patel | 3acc70e | 2011-08-15 22:04:40 +0000 | [diff] [blame] | 1262 | |
Bill Wendling | 2b128d7 | 2009-05-20 23:19:06 +0000 | [diff] [blame] | 1263 | // Clear debug info |
David Blaikie | 825bdd2 | 2014-05-21 22:41:17 +0000 | [diff] [blame] | 1264 | // Ownership of DbgVariables is a bit subtle - ScopeVariables owns all the |
| 1265 | // DbgVariables except those that are also in AbstractVariables (since they |
| 1266 | // can be used cross-function) |
David Blaikie | 80e5b1e | 2014-10-24 17:57:34 +0000 | [diff] [blame] | 1267 | InfoHolder.getScopeVariables().clear(); |
Jakob Stoklund Olesen | 9a624fa | 2011-03-26 02:19:36 +0000 | [diff] [blame] | 1268 | DbgValues.clear(); |
Devang Patel | 6c74a87 | 2010-04-27 19:46:33 +0000 | [diff] [blame] | 1269 | LabelsBeforeInsn.clear(); |
| 1270 | LabelsAfterInsn.clear(); |
Craig Topper | 353eda4 | 2014-04-24 06:44:33 +0000 | [diff] [blame] | 1271 | PrevLabel = nullptr; |
| 1272 | CurFn = nullptr; |
Bill Wendling | 2b128d7 | 2009-05-20 23:19:06 +0000 | [diff] [blame] | 1273 | } |
| 1274 | |
Eric Christopher | acdcbdb | 2012-11-27 22:43:45 +0000 | [diff] [blame] | 1275 | // Register a source line with debug info. Returns the unique label that was |
| 1276 | // emitted and which provides correspondence to the source line list. |
Devang Patel | 34a6620 | 2011-05-11 19:22:19 +0000 | [diff] [blame] | 1277 | void DwarfDebug::recordSourceLine(unsigned Line, unsigned Col, const MDNode *S, |
| 1278 | unsigned Flags) { |
Devang Patel | 2d9caf9 | 2009-11-25 17:36:49 +0000 | [diff] [blame] | 1279 | StringRef Fn; |
Devang Patel | e01b75c | 2011-03-24 20:30:50 +0000 | [diff] [blame] | 1280 | StringRef Dir; |
Dan Gohman | 50849c6 | 2010-05-05 23:41:32 +0000 | [diff] [blame] | 1281 | unsigned Src = 1; |
Diego Novillo | 282450d | 2014-03-03 18:53:17 +0000 | [diff] [blame] | 1282 | unsigned Discriminator = 0; |
David Blaikie | 4c6d987 | 2014-05-15 20:18:50 +0000 | [diff] [blame] | 1283 | if (DIScope Scope = DIScope(S)) { |
| 1284 | assert(Scope.isScope()); |
| 1285 | Fn = Scope.getFilename(); |
| 1286 | Dir = Scope.getDirectory(); |
David Blaikie | 2f3f76f | 2014-08-21 22:45:21 +0000 | [diff] [blame] | 1287 | if (Scope.isLexicalBlockFile()) |
| 1288 | Discriminator = DILexicalBlockFile(S).getDiscriminator(); |
Dan Gohman | 50849c6 | 2010-05-05 23:41:32 +0000 | [diff] [blame] | 1289 | |
David Blaikie | 0e8d401 | 2014-03-17 23:53:25 +0000 | [diff] [blame] | 1290 | unsigned CUID = Asm->OutStreamer.getContext().getDwarfCompileUnitID(); |
David Blaikie | c33b3cd | 2014-04-22 21:27:37 +0000 | [diff] [blame] | 1291 | Src = static_cast<DwarfCompileUnit &>(*InfoHolder.getUnits()[CUID]) |
| 1292 | .getOrCreateSourceID(Fn, Dir); |
Dan Gohman | 50849c6 | 2010-05-05 23:41:32 +0000 | [diff] [blame] | 1293 | } |
Diego Novillo | 282450d | 2014-03-03 18:53:17 +0000 | [diff] [blame] | 1294 | Asm->OutStreamer.EmitDwarfLocDirective(Src, Line, Col, Flags, 0, |
| 1295 | Discriminator, Fn); |
Bill Wendling | 2b128d7 | 2009-05-20 23:19:06 +0000 | [diff] [blame] | 1296 | } |
| 1297 | |
Bill Wendling | 806535f | 2009-05-20 23:22:40 +0000 | [diff] [blame] | 1298 | //===----------------------------------------------------------------------===// |
| 1299 | // Emit Methods |
| 1300 | //===----------------------------------------------------------------------===// |
| 1301 | |
Eric Christopher | acdcbdb | 2012-11-27 22:43:45 +0000 | [diff] [blame] | 1302 | // Emit initial Dwarf sections with a label at the start of each one. |
Eric Christopher | 7b30f2e4 | 2012-11-21 00:34:35 +0000 | [diff] [blame] | 1303 | void DwarfDebug::emitSectionLabels() { |
Chris Lattner | 4b7dadb | 2009-08-19 05:49:37 +0000 | [diff] [blame] | 1304 | const TargetLoweringObjectFile &TLOF = Asm->getObjFileLowering(); |
Daniel Dunbar | c418d6b | 2009-09-19 20:40:05 +0000 | [diff] [blame] | 1305 | |
Bill Wendling | 480ff32 | 2009-05-20 23:21:38 +0000 | [diff] [blame] | 1306 | // Dwarf sections base addresses. |
Rafael Espindola | 6b9998b | 2015-03-10 22:00:25 +0000 | [diff] [blame] | 1307 | emitSectionSym(Asm, TLOF.getDwarfInfoSection()); |
David Blaikie | 29459ae | 2014-07-25 17:11:58 +0000 | [diff] [blame] | 1308 | if (useSplitDwarf()) { |
Rafael Espindola | 6b9998b | 2015-03-10 22:00:25 +0000 | [diff] [blame] | 1309 | emitSectionSym(Asm, TLOF.getDwarfInfoDWOSection()); |
| 1310 | emitSectionSym(Asm, TLOF.getDwarfTypesDWOSection()); |
David Blaikie | 29459ae | 2014-07-25 17:11:58 +0000 | [diff] [blame] | 1311 | } |
Rafael Espindola | 6b9998b | 2015-03-10 22:00:25 +0000 | [diff] [blame] | 1312 | emitSectionSym(Asm, TLOF.getDwarfAbbrevSection()); |
Eric Christopher | 3c5a191 | 2012-12-19 22:02:53 +0000 | [diff] [blame] | 1313 | if (useSplitDwarf()) |
Rafael Espindola | 6b9998b | 2015-03-10 22:00:25 +0000 | [diff] [blame] | 1314 | emitSectionSym(Asm, TLOF.getDwarfAbbrevDWOSection()); |
Jim Grosbach | a8683bb | 2010-07-21 21:21:52 +0000 | [diff] [blame] | 1315 | |
Rafael Espindola | 6b9998b | 2015-03-10 22:00:25 +0000 | [diff] [blame] | 1316 | emitSectionSym(Asm, TLOF.getDwarfLineSection()); |
| 1317 | emitSectionSym(Asm, TLOF.getDwarfStrSection()); |
Eric Christopher | 55863be | 2013-04-07 03:43:09 +0000 | [diff] [blame] | 1318 | if (useSplitDwarf()) { |
Rafael Espindola | 6b9998b | 2015-03-10 22:00:25 +0000 | [diff] [blame] | 1319 | emitSectionSym(Asm, TLOF.getDwarfStrDWOSection()); |
| 1320 | emitSectionSym(Asm, TLOF.getDwarfAddrSection()); |
| 1321 | emitSectionSym(Asm, TLOF.getDwarfLocDWOSection()); |
David Blaikie | 9c550ac | 2014-03-25 01:44:02 +0000 | [diff] [blame] | 1322 | } else |
Rafael Espindola | 6b9998b | 2015-03-10 22:00:25 +0000 | [diff] [blame] | 1323 | emitSectionSym(Asm, TLOF.getDwarfLocSection()); |
| 1324 | emitSectionSym(Asm, TLOF.getDwarfRangesSection()); |
Bill Wendling | 480ff32 | 2009-05-20 23:21:38 +0000 | [diff] [blame] | 1325 | } |
| 1326 | |
Eric Christopher | 9c2ecd9 | 2012-11-30 23:59:06 +0000 | [diff] [blame] | 1327 | // Emit the debug info section. |
| 1328 | void DwarfDebug::emitDebugInfo() { |
Eric Christopher | f819485 | 2013-12-05 18:06:10 +0000 | [diff] [blame] | 1329 | DwarfFile &Holder = useSplitDwarf() ? SkeletonHolder : InfoHolder; |
Rafael Espindola | 063d725 | 2015-03-10 16:58:10 +0000 | [diff] [blame] | 1330 | Holder.emitUnits(/* UseOffsets */ false); |
Eric Christopher | 9c2ecd9 | 2012-11-30 23:59:06 +0000 | [diff] [blame] | 1331 | } |
| 1332 | |
Eric Christopher | acdcbdb | 2012-11-27 22:43:45 +0000 | [diff] [blame] | 1333 | // Emit the abbreviation section. |
Eric Christopher | 3837195 | 2012-11-20 23:30:11 +0000 | [diff] [blame] | 1334 | void DwarfDebug::emitAbbreviations() { |
Eric Christopher | f819485 | 2013-12-05 18:06:10 +0000 | [diff] [blame] | 1335 | DwarfFile &Holder = useSplitDwarf() ? SkeletonHolder : InfoHolder; |
David Blaikie | 0504cda | 2013-12-05 07:43:55 +0000 | [diff] [blame] | 1336 | |
| 1337 | Holder.emitAbbrevs(Asm->getObjFileLowering().getDwarfAbbrevSection()); |
Eric Christopher | 3c5a191 | 2012-12-19 22:02:53 +0000 | [diff] [blame] | 1338 | } |
Bill Wendling | 480ff32 | 2009-05-20 23:21:38 +0000 | [diff] [blame] | 1339 | |
Eric Christopher | acdcbdb | 2012-11-27 22:43:45 +0000 | [diff] [blame] | 1340 | // Emit the last address of the section and the end of the line matrix. |
Devang Patel | 930143b | 2009-11-21 02:48:08 +0000 | [diff] [blame] | 1341 | void DwarfDebug::emitEndOfLineMatrix(unsigned SectionEnd) { |
Bill Wendling | 480ff32 | 2009-05-20 23:21:38 +0000 | [diff] [blame] | 1342 | // Define last address of section. |
Chris Lattner | 566cae9 | 2010-03-09 23:52:58 +0000 | [diff] [blame] | 1343 | Asm->OutStreamer.AddComment("Extended Op"); |
| 1344 | Asm->EmitInt8(0); |
Jim Grosbach | a8683bb | 2010-07-21 21:21:52 +0000 | [diff] [blame] | 1345 | |
Chris Lattner | 566cae9 | 2010-03-09 23:52:58 +0000 | [diff] [blame] | 1346 | Asm->OutStreamer.AddComment("Op size"); |
Chandler Carruth | 5da3f05 | 2012-11-01 09:14:31 +0000 | [diff] [blame] | 1347 | Asm->EmitInt8(Asm->getDataLayout().getPointerSize() + 1); |
Chris Lattner | 566cae9 | 2010-03-09 23:52:58 +0000 | [diff] [blame] | 1348 | Asm->OutStreamer.AddComment("DW_LNE_set_address"); |
| 1349 | Asm->EmitInt8(dwarf::DW_LNE_set_address); |
| 1350 | |
| 1351 | Asm->OutStreamer.AddComment("Section end label"); |
Chris Lattner | b245dfb | 2010-03-10 01:17:49 +0000 | [diff] [blame] | 1352 | |
Eric Christopher | b4bef6d | 2013-11-19 09:04:36 +0000 | [diff] [blame] | 1353 | Asm->OutStreamer.EmitSymbolValue( |
| 1354 | Asm->GetTempSymbol("section_end", SectionEnd), |
| 1355 | Asm->getDataLayout().getPointerSize()); |
Bill Wendling | 480ff32 | 2009-05-20 23:21:38 +0000 | [diff] [blame] | 1356 | |
| 1357 | // Mark end of matrix. |
Chris Lattner | 566cae9 | 2010-03-09 23:52:58 +0000 | [diff] [blame] | 1358 | Asm->OutStreamer.AddComment("DW_LNE_end_sequence"); |
| 1359 | Asm->EmitInt8(0); |
Chris Lattner | f5c834f | 2010-01-22 22:09:00 +0000 | [diff] [blame] | 1360 | Asm->EmitInt8(1); |
Chris Lattner | fa82355 | 2010-01-22 23:18:42 +0000 | [diff] [blame] | 1361 | Asm->EmitInt8(1); |
Bill Wendling | 480ff32 | 2009-05-20 23:21:38 +0000 | [diff] [blame] | 1362 | } |
| 1363 | |
David Blaikie | 6741bb0 | 2014-09-11 21:12:48 +0000 | [diff] [blame] | 1364 | void DwarfDebug::emitAccel(DwarfAccelTable &Accel, const MCSection *Section, |
Rafael Espindola | 6b9998b | 2015-03-10 22:00:25 +0000 | [diff] [blame] | 1365 | StringRef TableName) { |
David Blaikie | 6741bb0 | 2014-09-11 21:12:48 +0000 | [diff] [blame] | 1366 | Accel.FinalizeTable(Asm, TableName); |
Rafael Espindola | 6b9998b | 2015-03-10 22:00:25 +0000 | [diff] [blame] | 1367 | emitSectionSym(Asm, Section); |
Eric Christopher | 4996c70 | 2011-11-07 09:24:32 +0000 | [diff] [blame] | 1368 | |
| 1369 | // Emit the full data. |
Rafael Espindola | 063d725 | 2015-03-10 16:58:10 +0000 | [diff] [blame] | 1370 | Accel.emit(Asm, Section->getBeginSymbol(), this); |
David Blaikie | 6741bb0 | 2014-09-11 21:12:48 +0000 | [diff] [blame] | 1371 | } |
| 1372 | |
| 1373 | // Emit visible names into a hashed accelerator table section. |
| 1374 | void DwarfDebug::emitAccelNames() { |
| 1375 | emitAccel(AccelNames, Asm->getObjFileLowering().getDwarfAccelNamesSection(), |
Rafael Espindola | 6b9998b | 2015-03-10 22:00:25 +0000 | [diff] [blame] | 1376 | "Names"); |
Eric Christopher | 4996c70 | 2011-11-07 09:24:32 +0000 | [diff] [blame] | 1377 | } |
| 1378 | |
Eric Christopher | 48fef59 | 2012-12-20 21:58:40 +0000 | [diff] [blame] | 1379 | // Emit objective C classes and categories into a hashed accelerator table |
| 1380 | // section. |
Eric Christopher | 4996c70 | 2011-11-07 09:24:32 +0000 | [diff] [blame] | 1381 | void DwarfDebug::emitAccelObjC() { |
David Blaikie | 6741bb0 | 2014-09-11 21:12:48 +0000 | [diff] [blame] | 1382 | emitAccel(AccelObjC, Asm->getObjFileLowering().getDwarfAccelObjCSection(), |
Rafael Espindola | 6b9998b | 2015-03-10 22:00:25 +0000 | [diff] [blame] | 1383 | "ObjC"); |
Eric Christopher | 4996c70 | 2011-11-07 09:24:32 +0000 | [diff] [blame] | 1384 | } |
| 1385 | |
Eric Christopher | acdcbdb | 2012-11-27 22:43:45 +0000 | [diff] [blame] | 1386 | // Emit namespace dies into a hashed accelerator table. |
Eric Christopher | 4996c70 | 2011-11-07 09:24:32 +0000 | [diff] [blame] | 1387 | void DwarfDebug::emitAccelNamespaces() { |
David Blaikie | 6741bb0 | 2014-09-11 21:12:48 +0000 | [diff] [blame] | 1388 | emitAccel(AccelNamespace, |
| 1389 | Asm->getObjFileLowering().getDwarfAccelNamespaceSection(), |
Rafael Espindola | 6b9998b | 2015-03-10 22:00:25 +0000 | [diff] [blame] | 1390 | "namespac"); |
Eric Christopher | 4996c70 | 2011-11-07 09:24:32 +0000 | [diff] [blame] | 1391 | } |
| 1392 | |
Eric Christopher | acdcbdb | 2012-11-27 22:43:45 +0000 | [diff] [blame] | 1393 | // Emit type dies into a hashed accelerator table. |
Eric Christopher | 4996c70 | 2011-11-07 09:24:32 +0000 | [diff] [blame] | 1394 | void DwarfDebug::emitAccelTypes() { |
David Blaikie | 6741bb0 | 2014-09-11 21:12:48 +0000 | [diff] [blame] | 1395 | emitAccel(AccelTypes, Asm->getObjFileLowering().getDwarfAccelTypesSection(), |
Rafael Espindola | 6b9998b | 2015-03-10 22:00:25 +0000 | [diff] [blame] | 1396 | "types"); |
Eric Christopher | 4996c70 | 2011-11-07 09:24:32 +0000 | [diff] [blame] | 1397 | } |
| 1398 | |
Eric Christopher | dd1a012 | 2013-09-13 00:35:05 +0000 | [diff] [blame] | 1399 | // Public name handling. |
| 1400 | // The format for the various pubnames: |
| 1401 | // |
| 1402 | // dwarf pubnames - offset/name pairs where the offset is the offset into the CU |
| 1403 | // for the DIE that is named. |
| 1404 | // |
| 1405 | // gnu pubnames - offset/index value/name tuples where the offset is the offset |
| 1406 | // into the CU and the index value is computed according to the type of value |
| 1407 | // for the DIE that is named. |
| 1408 | // |
| 1409 | // For type units the offset is the offset of the skeleton DIE. For split dwarf |
| 1410 | // it's the offset within the debug_info/debug_types dwo section, however, the |
| 1411 | // reference in the pubname header doesn't change. |
| 1412 | |
| 1413 | /// computeIndexValue - Compute the gdb index value for the DIE and CU. |
Eric Christopher | a5a7942 | 2013-12-09 23:32:48 +0000 | [diff] [blame] | 1414 | static dwarf::PubIndexEntryDescriptor computeIndexValue(DwarfUnit *CU, |
Eric Christopher | 0fe676a | 2013-11-21 00:48:22 +0000 | [diff] [blame] | 1415 | const DIE *Die) { |
Eric Christopher | d2b497b | 2013-10-16 01:37:49 +0000 | [diff] [blame] | 1416 | dwarf::GDBIndexEntryLinkage Linkage = dwarf::GIEL_STATIC; |
| 1417 | |
| 1418 | // We could have a specification DIE that has our most of our knowledge, |
| 1419 | // look for that now. |
| 1420 | DIEValue *SpecVal = Die->findAttribute(dwarf::DW_AT_specification); |
| 1421 | if (SpecVal) { |
David Blaikie | 8dbcc3f | 2014-04-25 19:33:43 +0000 | [diff] [blame] | 1422 | DIE &SpecDIE = cast<DIEEntry>(SpecVal)->getEntry(); |
| 1423 | if (SpecDIE.findAttribute(dwarf::DW_AT_external)) |
Eric Christopher | d2b497b | 2013-10-16 01:37:49 +0000 | [diff] [blame] | 1424 | Linkage = dwarf::GIEL_EXTERNAL; |
| 1425 | } else if (Die->findAttribute(dwarf::DW_AT_external)) |
| 1426 | Linkage = dwarf::GIEL_EXTERNAL; |
Eric Christopher | dd1a012 | 2013-09-13 00:35:05 +0000 | [diff] [blame] | 1427 | |
| 1428 | switch (Die->getTag()) { |
| 1429 | case dwarf::DW_TAG_class_type: |
| 1430 | case dwarf::DW_TAG_structure_type: |
| 1431 | case dwarf::DW_TAG_union_type: |
| 1432 | case dwarf::DW_TAG_enumeration_type: |
Eric Christopher | 261d234 | 2013-09-23 20:55:35 +0000 | [diff] [blame] | 1433 | return dwarf::PubIndexEntryDescriptor( |
| 1434 | dwarf::GIEK_TYPE, CU->getLanguage() != dwarf::DW_LANG_C_plus_plus |
| 1435 | ? dwarf::GIEL_STATIC |
| 1436 | : dwarf::GIEL_EXTERNAL); |
Eric Christopher | dd1a012 | 2013-09-13 00:35:05 +0000 | [diff] [blame] | 1437 | case dwarf::DW_TAG_typedef: |
| 1438 | case dwarf::DW_TAG_base_type: |
| 1439 | case dwarf::DW_TAG_subrange_type: |
David Blaikie | 8dec407 | 2013-09-19 20:40:26 +0000 | [diff] [blame] | 1440 | return dwarf::PubIndexEntryDescriptor(dwarf::GIEK_TYPE, dwarf::GIEL_STATIC); |
Eric Christopher | dd1a012 | 2013-09-13 00:35:05 +0000 | [diff] [blame] | 1441 | case dwarf::DW_TAG_namespace: |
David Blaikie | 8dec407 | 2013-09-19 20:40:26 +0000 | [diff] [blame] | 1442 | return dwarf::GIEK_TYPE; |
Eric Christopher | dd1a012 | 2013-09-13 00:35:05 +0000 | [diff] [blame] | 1443 | case dwarf::DW_TAG_subprogram: |
Eric Christopher | ccac5c4 | 2013-09-23 22:59:14 +0000 | [diff] [blame] | 1444 | return dwarf::PubIndexEntryDescriptor(dwarf::GIEK_FUNCTION, Linkage); |
Eric Christopher | dd1a012 | 2013-09-13 00:35:05 +0000 | [diff] [blame] | 1445 | case dwarf::DW_TAG_variable: |
Eric Christopher | ccac5c4 | 2013-09-23 22:59:14 +0000 | [diff] [blame] | 1446 | return dwarf::PubIndexEntryDescriptor(dwarf::GIEK_VARIABLE, Linkage); |
Eric Christopher | dd1a012 | 2013-09-13 00:35:05 +0000 | [diff] [blame] | 1447 | case dwarf::DW_TAG_enumerator: |
David Blaikie | 8dec407 | 2013-09-19 20:40:26 +0000 | [diff] [blame] | 1448 | return dwarf::PubIndexEntryDescriptor(dwarf::GIEK_VARIABLE, |
| 1449 | dwarf::GIEL_STATIC); |
Eric Christopher | dd1a012 | 2013-09-13 00:35:05 +0000 | [diff] [blame] | 1450 | default: |
David Blaikie | 8dec407 | 2013-09-19 20:40:26 +0000 | [diff] [blame] | 1451 | return dwarf::GIEK_NONE; |
Eric Christopher | dd1a012 | 2013-09-13 00:35:05 +0000 | [diff] [blame] | 1452 | } |
Eric Christopher | dd1a012 | 2013-09-13 00:35:05 +0000 | [diff] [blame] | 1453 | } |
| 1454 | |
Eric Christopher | 5f93bb9 | 2013-09-09 20:03:17 +0000 | [diff] [blame] | 1455 | /// emitDebugPubNames - Emit visible names into a debug pubnames section. |
Krzysztof Parzyszek | 228daa6 | 2013-02-12 18:00:14 +0000 | [diff] [blame] | 1456 | /// |
Eric Christopher | dd1a012 | 2013-09-13 00:35:05 +0000 | [diff] [blame] | 1457 | void DwarfDebug::emitDebugPubNames(bool GnuStyle) { |
Eric Christopher | dd1a012 | 2013-09-13 00:35:05 +0000 | [diff] [blame] | 1458 | const MCSection *PSec = |
| 1459 | GnuStyle ? Asm->getObjFileLowering().getDwarfGnuPubNamesSection() |
| 1460 | : Asm->getObjFileLowering().getDwarfPubNamesSection(); |
Krzysztof Parzyszek | 228daa6 | 2013-02-12 18:00:14 +0000 | [diff] [blame] | 1461 | |
David Blaikie | 192b45c | 2014-11-02 06:16:39 +0000 | [diff] [blame] | 1462 | emitDebugPubSection(GnuStyle, PSec, "Names", |
| 1463 | &DwarfCompileUnit::getGlobalNames); |
David Blaikie | 0f55e83 | 2014-03-11 23:18:15 +0000 | [diff] [blame] | 1464 | } |
| 1465 | |
| 1466 | void DwarfDebug::emitDebugPubSection( |
| 1467 | bool GnuStyle, const MCSection *PSec, StringRef Name, |
David Blaikie | 192b45c | 2014-11-02 06:16:39 +0000 | [diff] [blame] | 1468 | const StringMap<const DIE *> &(DwarfCompileUnit::*Accessor)() const) { |
David Blaikie | c3d9e9e | 2014-03-06 01:42:00 +0000 | [diff] [blame] | 1469 | for (const auto &NU : CUMap) { |
| 1470 | DwarfCompileUnit *TheU = NU.second; |
David Blaikie | 55bb8ac | 2014-03-11 23:23:39 +0000 | [diff] [blame] | 1471 | |
| 1472 | const auto &Globals = (TheU->*Accessor)(); |
| 1473 | |
David Blaikie | ce2f1cb | 2014-03-11 23:35:06 +0000 | [diff] [blame] | 1474 | if (Globals.empty()) |
| 1475 | continue; |
| 1476 | |
David Blaikie | bbad0bb | 2014-11-01 01:03:39 +0000 | [diff] [blame] | 1477 | if (auto *Skeleton = TheU->getSkeleton()) |
David Blaikie | c3d9e9e | 2014-03-06 01:42:00 +0000 | [diff] [blame] | 1478 | TheU = Skeleton; |
David Blaikie | 2a80e44 | 2013-12-02 22:09:48 +0000 | [diff] [blame] | 1479 | unsigned ID = TheU->getUniqueID(); |
Krzysztof Parzyszek | 228daa6 | 2013-02-12 18:00:14 +0000 | [diff] [blame] | 1480 | |
Krzysztof Parzyszek | 228daa6 | 2013-02-12 18:00:14 +0000 | [diff] [blame] | 1481 | // Start the dwarf pubnames section. |
Eric Christopher | 13b99d2 | 2013-09-10 21:49:37 +0000 | [diff] [blame] | 1482 | Asm->OutStreamer.SwitchSection(PSec); |
Krzysztof Parzyszek | 228daa6 | 2013-02-12 18:00:14 +0000 | [diff] [blame] | 1483 | |
Eric Christopher | dd1a012 | 2013-09-13 00:35:05 +0000 | [diff] [blame] | 1484 | // Emit the header. |
David Blaikie | 0f55e83 | 2014-03-11 23:18:15 +0000 | [diff] [blame] | 1485 | Asm->OutStreamer.AddComment("Length of Public " + Name + " Info"); |
| 1486 | MCSymbol *BeginLabel = Asm->GetTempSymbol("pub" + Name + "_begin", ID); |
| 1487 | MCSymbol *EndLabel = Asm->GetTempSymbol("pub" + Name + "_end", ID); |
David Blaikie | b7a1c4d | 2013-12-04 17:55:41 +0000 | [diff] [blame] | 1488 | Asm->EmitLabelDifference(EndLabel, BeginLabel, 4); |
Krzysztof Parzyszek | 228daa6 | 2013-02-12 18:00:14 +0000 | [diff] [blame] | 1489 | |
David Blaikie | b7a1c4d | 2013-12-04 17:55:41 +0000 | [diff] [blame] | 1490 | Asm->OutStreamer.EmitLabel(BeginLabel); |
Krzysztof Parzyszek | 228daa6 | 2013-02-12 18:00:14 +0000 | [diff] [blame] | 1491 | |
| 1492 | Asm->OutStreamer.AddComment("DWARF Version"); |
David Majnemer | ed89b5c | 2013-08-21 06:13:34 +0000 | [diff] [blame] | 1493 | Asm->EmitInt16(dwarf::DW_PUBNAMES_VERSION); |
Krzysztof Parzyszek | 228daa6 | 2013-02-12 18:00:14 +0000 | [diff] [blame] | 1494 | |
| 1495 | Asm->OutStreamer.AddComment("Offset of Compilation Unit Info"); |
Rafael Espindola | 063d725 | 2015-03-10 16:58:10 +0000 | [diff] [blame] | 1496 | Asm->emitSectionOffset(TheU->getLabelBegin()); |
Krzysztof Parzyszek | 228daa6 | 2013-02-12 18:00:14 +0000 | [diff] [blame] | 1497 | |
| 1498 | Asm->OutStreamer.AddComment("Compilation Unit Length"); |
David Blaikie | 983bfea | 2014-11-01 23:07:14 +0000 | [diff] [blame] | 1499 | Asm->EmitInt32(TheU->getLength()); |
Krzysztof Parzyszek | 228daa6 | 2013-02-12 18:00:14 +0000 | [diff] [blame] | 1500 | |
Eric Christopher | dd1a012 | 2013-09-13 00:35:05 +0000 | [diff] [blame] | 1501 | // Emit the pubnames for this compilation unit. |
David Blaikie | 55bb8ac | 2014-03-11 23:23:39 +0000 | [diff] [blame] | 1502 | for (const auto &GI : Globals) { |
Benjamin Kramer | 15596c7 | 2014-03-07 19:09:39 +0000 | [diff] [blame] | 1503 | const char *Name = GI.getKeyData(); |
| 1504 | const DIE *Entity = GI.second; |
Krzysztof Parzyszek | 228daa6 | 2013-02-12 18:00:14 +0000 | [diff] [blame] | 1505 | |
| 1506 | Asm->OutStreamer.AddComment("DIE offset"); |
| 1507 | Asm->EmitInt32(Entity->getOffset()); |
| 1508 | |
Eric Christopher | dd1a012 | 2013-09-13 00:35:05 +0000 | [diff] [blame] | 1509 | if (GnuStyle) { |
David Blaikie | 2a80e44 | 2013-12-02 22:09:48 +0000 | [diff] [blame] | 1510 | dwarf::PubIndexEntryDescriptor Desc = computeIndexValue(TheU, Entity); |
David Blaikie | d0a869d | 2013-09-19 22:19:37 +0000 | [diff] [blame] | 1511 | Asm->OutStreamer.AddComment( |
David Blaikie | efd0bcb | 2013-09-20 00:33:15 +0000 | [diff] [blame] | 1512 | Twine("Kind: ") + dwarf::GDBIndexEntryKindString(Desc.Kind) + ", " + |
David Blaikie | 404d304 | 2013-09-19 23:01:29 +0000 | [diff] [blame] | 1513 | dwarf::GDBIndexEntryLinkageString(Desc.Linkage)); |
David Blaikie | d0a869d | 2013-09-19 22:19:37 +0000 | [diff] [blame] | 1514 | Asm->EmitInt8(Desc.toBits()); |
Eric Christopher | dd1a012 | 2013-09-13 00:35:05 +0000 | [diff] [blame] | 1515 | } |
| 1516 | |
David Blaikie | 155f881 | 2013-12-04 21:51:05 +0000 | [diff] [blame] | 1517 | Asm->OutStreamer.AddComment("External Name"); |
Benjamin Kramer | 15596c7 | 2014-03-07 19:09:39 +0000 | [diff] [blame] | 1518 | Asm->OutStreamer.EmitBytes(StringRef(Name, GI.getKeyLength() + 1)); |
Krzysztof Parzyszek | 228daa6 | 2013-02-12 18:00:14 +0000 | [diff] [blame] | 1519 | } |
| 1520 | |
| 1521 | Asm->OutStreamer.AddComment("End Mark"); |
| 1522 | Asm->EmitInt32(0); |
David Blaikie | b7a1c4d | 2013-12-04 17:55:41 +0000 | [diff] [blame] | 1523 | Asm->OutStreamer.EmitLabel(EndLabel); |
Krzysztof Parzyszek | 228daa6 | 2013-02-12 18:00:14 +0000 | [diff] [blame] | 1524 | } |
| 1525 | } |
| 1526 | |
Eric Christopher | dd1a012 | 2013-09-13 00:35:05 +0000 | [diff] [blame] | 1527 | void DwarfDebug::emitDebugPubTypes(bool GnuStyle) { |
Eric Christopher | 261d234 | 2013-09-23 20:55:35 +0000 | [diff] [blame] | 1528 | const MCSection *PSec = |
| 1529 | GnuStyle ? Asm->getObjFileLowering().getDwarfGnuPubTypesSection() |
| 1530 | : Asm->getObjFileLowering().getDwarfPubTypesSection(); |
Eric Christopher | 8b3737f | 2013-09-13 00:34:58 +0000 | [diff] [blame] | 1531 | |
David Blaikie | 192b45c | 2014-11-02 06:16:39 +0000 | [diff] [blame] | 1532 | emitDebugPubSection(GnuStyle, PSec, "Types", |
| 1533 | &DwarfCompileUnit::getGlobalTypes); |
Devang Patel | 04d2f2d | 2009-11-24 01:14:22 +0000 | [diff] [blame] | 1534 | } |
| 1535 | |
Eric Christopher | 3bf29fd | 2012-12-27 02:14:01 +0000 | [diff] [blame] | 1536 | // Emit visible names into a debug str section. |
| 1537 | void DwarfDebug::emitDebugStr() { |
Eric Christopher | f819485 | 2013-12-05 18:06:10 +0000 | [diff] [blame] | 1538 | DwarfFile &Holder = useSplitDwarf() ? SkeletonHolder : InfoHolder; |
Eric Christopher | 3bf29fd | 2012-12-27 02:14:01 +0000 | [diff] [blame] | 1539 | Holder.emitStrings(Asm->getObjFileLowering().getDwarfStrSection()); |
| 1540 | } |
| 1541 | |
Adrian Prantl | b141683 | 2014-08-01 22:11:58 +0000 | [diff] [blame] | 1542 | |
Eric Christopher | 29e874d | 2014-03-07 22:40:37 +0000 | [diff] [blame] | 1543 | void DwarfDebug::emitDebugLocEntry(ByteStreamer &Streamer, |
Eric Christopher | 05135fb | 2014-03-18 02:18:24 +0000 | [diff] [blame] | 1544 | const DebugLocEntry &Entry) { |
Adrian Prantl | 92da14b | 2015-03-02 22:02:33 +0000 | [diff] [blame] | 1545 | auto Comment = Entry.getComments().begin(); |
| 1546 | auto End = Entry.getComments().end(); |
| 1547 | for (uint8_t Byte : Entry.getDWARFBytes()) |
| 1548 | Streamer.EmitInt8(Byte, Comment != End ? *(Comment++) : ""); |
Adrian Prantl | b141683 | 2014-08-01 22:11:58 +0000 | [diff] [blame] | 1549 | } |
| 1550 | |
Adrian Prantl | 92da14b | 2015-03-02 22:02:33 +0000 | [diff] [blame] | 1551 | static void emitDebugLocValue(const AsmPrinter &AP, |
| 1552 | const DITypeIdentifierMap &TypeIdentifierMap, |
| 1553 | ByteStreamer &Streamer, |
| 1554 | const DebugLocEntry::Value &Value, |
| 1555 | unsigned PieceOffsetInBits) { |
Adrian Prantl | 76502d8 | 2014-08-11 23:22:59 +0000 | [diff] [blame] | 1556 | DIVariable DV = Value.getVariable(); |
Adrian Prantl | 92da14b | 2015-03-02 22:02:33 +0000 | [diff] [blame] | 1557 | DebugLocDwarfExpression DwarfExpr( |
| 1558 | *AP.TM.getSubtargetImpl()->getRegisterInfo(), |
| 1559 | AP.getDwarfDebug()->getDwarfVersion(), Streamer); |
Adrian Prantl | b141683 | 2014-08-01 22:11:58 +0000 | [diff] [blame] | 1560 | // Regular entry. |
Adrian Prantl | e19e5ef | 2014-04-27 18:25:40 +0000 | [diff] [blame] | 1561 | if (Value.isInt()) { |
Adrian Prantl | 92da14b | 2015-03-02 22:02:33 +0000 | [diff] [blame] | 1562 | DIBasicType BTy(DV.getType().resolve(TypeIdentifierMap)); |
Eric Christopher | 29e874d | 2014-03-07 22:40:37 +0000 | [diff] [blame] | 1563 | if (BTy.Verify() && (BTy.getEncoding() == dwarf::DW_ATE_signed || |
Adrian Prantl | 66f2595 | 2015-01-13 00:04:06 +0000 | [diff] [blame] | 1564 | BTy.getEncoding() == dwarf::DW_ATE_signed_char)) |
Adrian Prantl | 092d948 | 2015-01-13 23:39:11 +0000 | [diff] [blame] | 1565 | DwarfExpr.AddSignedConstant(Value.getInt()); |
Adrian Prantl | 66f2595 | 2015-01-13 00:04:06 +0000 | [diff] [blame] | 1566 | else |
Adrian Prantl | 092d948 | 2015-01-13 23:39:11 +0000 | [diff] [blame] | 1567 | DwarfExpr.AddUnsignedConstant(Value.getInt()); |
Adrian Prantl | e19e5ef | 2014-04-27 18:25:40 +0000 | [diff] [blame] | 1568 | } else if (Value.isLocation()) { |
| 1569 | MachineLocation Loc = Value.getLoc(); |
Adrian Prantl | 87b7eb9 | 2014-10-01 18:55:02 +0000 | [diff] [blame] | 1570 | DIExpression Expr = Value.getExpression(); |
Adrian Prantl | 092d948 | 2015-01-13 23:39:11 +0000 | [diff] [blame] | 1571 | if (!Expr || (Expr.getNumElements() == 0)) |
Eric Christopher | 29e874d | 2014-03-07 22:40:37 +0000 | [diff] [blame] | 1572 | // Regular entry. |
Adrian Prantl | 92da14b | 2015-03-02 22:02:33 +0000 | [diff] [blame] | 1573 | AP.EmitDwarfRegOp(Streamer, Loc); |
Eric Christopher | 29e874d | 2014-03-07 22:40:37 +0000 | [diff] [blame] | 1574 | else { |
| 1575 | // Complex address entry. |
Adrian Prantl | 092d948 | 2015-01-13 23:39:11 +0000 | [diff] [blame] | 1576 | if (Loc.getOffset()) { |
| 1577 | DwarfExpr.AddMachineRegIndirect(Loc.getReg(), Loc.getOffset()); |
Duncan P. N. Exon Smith | 57bab0b | 2015-02-17 22:30:56 +0000 | [diff] [blame] | 1578 | DwarfExpr.AddExpression(Expr.begin(), Expr.end(), PieceOffsetInBits); |
Adrian Prantl | 092d948 | 2015-01-13 23:39:11 +0000 | [diff] [blame] | 1579 | } else |
| 1580 | DwarfExpr.AddMachineRegExpression(Expr, Loc.getReg(), |
| 1581 | PieceOffsetInBits); |
Eric Christopher | 29e874d | 2014-03-07 22:40:37 +0000 | [diff] [blame] | 1582 | } |
| 1583 | } |
| 1584 | // else ... ignore constant fp. There is not any good way to |
| 1585 | // to represent them here in dwarf. |
| 1586 | // FIXME: ^ |
| 1587 | } |
| 1588 | |
Adrian Prantl | 92da14b | 2015-03-02 22:02:33 +0000 | [diff] [blame] | 1589 | |
| 1590 | void DebugLocEntry::finalize(const AsmPrinter &AP, |
| 1591 | const DITypeIdentifierMap &TypeIdentifierMap) { |
| 1592 | BufferByteStreamer Streamer(DWARFBytes, Comments); |
| 1593 | const DebugLocEntry::Value Value = Values[0]; |
| 1594 | if (Value.isBitPiece()) { |
| 1595 | // Emit all pieces that belong to the same variable and range. |
| 1596 | assert(std::all_of(Values.begin(), Values.end(), [](DebugLocEntry::Value P) { |
| 1597 | return P.isBitPiece(); |
| 1598 | }) && "all values are expected to be pieces"); |
| 1599 | assert(std::is_sorted(Values.begin(), Values.end()) && |
| 1600 | "pieces are expected to be sorted"); |
| 1601 | |
| 1602 | unsigned Offset = 0; |
| 1603 | for (auto Piece : Values) { |
| 1604 | DIExpression Expr = Piece.getExpression(); |
| 1605 | unsigned PieceOffset = Expr.getBitPieceOffset(); |
| 1606 | unsigned PieceSize = Expr.getBitPieceSize(); |
| 1607 | assert(Offset <= PieceOffset && "overlapping or duplicate pieces"); |
| 1608 | if (Offset < PieceOffset) { |
| 1609 | // The DWARF spec seriously mandates pieces with no locations for gaps. |
| 1610 | DebugLocDwarfExpression Expr( |
| 1611 | *AP.TM.getSubtargetImpl()->getRegisterInfo(), |
| 1612 | AP.getDwarfDebug()->getDwarfVersion(), Streamer); |
| 1613 | Expr.AddOpPiece(PieceOffset-Offset, 0); |
| 1614 | Offset += PieceOffset-Offset; |
| 1615 | } |
| 1616 | Offset += PieceSize; |
| 1617 | |
| 1618 | #ifndef NDEBUG |
| 1619 | DIVariable Var = Piece.getVariable(); |
| 1620 | unsigned VarSize = Var.getSizeInBits(TypeIdentifierMap); |
| 1621 | assert(PieceSize+PieceOffset <= VarSize |
| 1622 | && "piece is larger than or outside of variable"); |
| 1623 | assert(PieceSize != VarSize |
| 1624 | && "piece covers entire variable"); |
| 1625 | #endif |
| 1626 | emitDebugLocValue(AP, TypeIdentifierMap, Streamer, Piece, PieceOffset); |
| 1627 | } |
| 1628 | } else { |
| 1629 | assert(Values.size() == 1 && "only pieces may have >1 value"); |
| 1630 | emitDebugLocValue(AP, TypeIdentifierMap, Streamer, Value, 0); |
| 1631 | } |
| 1632 | } |
| 1633 | |
| 1634 | |
David Blaikie | 0e84adc | 2014-04-01 16:17:41 +0000 | [diff] [blame] | 1635 | void DwarfDebug::emitDebugLocEntryLocation(const DebugLocEntry &Entry) { |
| 1636 | Asm->OutStreamer.AddComment("Loc expr size"); |
| 1637 | MCSymbol *begin = Asm->OutStreamer.getContext().CreateTempSymbol(); |
| 1638 | MCSymbol *end = Asm->OutStreamer.getContext().CreateTempSymbol(); |
| 1639 | Asm->EmitLabelDifference(end, begin, 2); |
| 1640 | Asm->OutStreamer.EmitLabel(begin); |
| 1641 | // Emit the entry. |
| 1642 | APByteStreamer Streamer(*Asm); |
| 1643 | emitDebugLocEntry(Streamer, Entry); |
| 1644 | // Close the range. |
| 1645 | Asm->OutStreamer.EmitLabel(end); |
| 1646 | } |
| 1647 | |
Eric Christopher | 9046f94 | 2013-07-02 21:36:07 +0000 | [diff] [blame] | 1648 | // Emit locations into the debug loc section. |
Devang Patel | 930143b | 2009-11-21 02:48:08 +0000 | [diff] [blame] | 1649 | void DwarfDebug::emitDebugLoc() { |
Daniel Dunbar | fd95b01 | 2011-03-16 22:16:39 +0000 | [diff] [blame] | 1650 | // Start the dwarf loc section. |
Chris Lattner | 4b7dadb | 2009-08-19 05:49:37 +0000 | [diff] [blame] | 1651 | Asm->OutStreamer.SwitchSection( |
David Blaikie | 94c1d7f | 2014-04-02 01:50:20 +0000 | [diff] [blame] | 1652 | Asm->getObjFileLowering().getDwarfLocSection()); |
Chandler Carruth | 5da3f05 | 2012-11-01 09:14:31 +0000 | [diff] [blame] | 1653 | unsigned char Size = Asm->getDataLayout().getPointerSize(); |
David Blaikie | 84d8e18 | 2014-03-24 22:38:38 +0000 | [diff] [blame] | 1654 | for (const auto &DebugLoc : DotDebugLocEntries) { |
David Blaikie | 0a456de | 2014-04-02 01:43:18 +0000 | [diff] [blame] | 1655 | Asm->OutStreamer.EmitLabel(DebugLoc.Label); |
David Blaikie | e1a26a6 | 2014-08-05 23:14:16 +0000 | [diff] [blame] | 1656 | const DwarfCompileUnit *CU = DebugLoc.CU; |
David Blaikie | 0a456de | 2014-04-02 01:43:18 +0000 | [diff] [blame] | 1657 | for (const auto &Entry : DebugLoc.List) { |
Eric Christopher | 384f3fe | 2014-03-20 19:16:16 +0000 | [diff] [blame] | 1658 | // Set up the range. This range is relative to the entry point of the |
| 1659 | // compile unit. This is a hard coded 0 for low_pc when we're emitting |
| 1660 | // ranges, or the DW_AT_low_pc on the compile unit otherwise. |
David Blaikie | ce34349 | 2014-11-03 21:15:30 +0000 | [diff] [blame] | 1661 | if (auto *Base = CU->getBaseAddress()) { |
Eric Christopher | 384f3fe | 2014-03-20 19:16:16 +0000 | [diff] [blame] | 1662 | Asm->EmitLabelDifference(Entry.getBeginSym(), Base, Size); |
| 1663 | Asm->EmitLabelDifference(Entry.getEndSym(), Base, Size); |
| 1664 | } else { |
| 1665 | Asm->OutStreamer.EmitSymbolValue(Entry.getBeginSym(), Size); |
| 1666 | Asm->OutStreamer.EmitSymbolValue(Entry.getEndSym(), Size); |
| 1667 | } |
David Blaikie | 94c1d7f | 2014-04-02 01:50:20 +0000 | [diff] [blame] | 1668 | |
David Blaikie | 0e84adc | 2014-04-01 16:17:41 +0000 | [diff] [blame] | 1669 | emitDebugLocEntryLocation(Entry); |
Devang Patel | 9fc1170 | 2010-05-25 23:40:22 +0000 | [diff] [blame] | 1670 | } |
David Blaikie | 94c1d7f | 2014-04-02 01:50:20 +0000 | [diff] [blame] | 1671 | Asm->OutStreamer.EmitIntValue(0, Size); |
| 1672 | Asm->OutStreamer.EmitIntValue(0, Size); |
| 1673 | } |
| 1674 | } |
| 1675 | |
| 1676 | void DwarfDebug::emitDebugLocDWO() { |
| 1677 | Asm->OutStreamer.SwitchSection( |
| 1678 | Asm->getObjFileLowering().getDwarfLocDWOSection()); |
| 1679 | for (const auto &DebugLoc : DotDebugLocEntries) { |
| 1680 | Asm->OutStreamer.EmitLabel(DebugLoc.Label); |
| 1681 | for (const auto &Entry : DebugLoc.List) { |
| 1682 | // Just always use start_length for now - at least that's one address |
| 1683 | // rather than two. We could get fancier and try to, say, reuse an |
| 1684 | // address we know we've emitted elsewhere (the start of the function? |
| 1685 | // The start of the CU or CU subrange that encloses this range?) |
| 1686 | Asm->EmitInt8(dwarf::DW_LLE_start_length_entry); |
David Blaikie | d75fb28 | 2014-04-23 21:20:10 +0000 | [diff] [blame] | 1687 | unsigned idx = AddrPool.getIndex(Entry.getBeginSym()); |
David Blaikie | 94c1d7f | 2014-04-02 01:50:20 +0000 | [diff] [blame] | 1688 | Asm->EmitULEB128(idx); |
| 1689 | Asm->EmitLabelDifference(Entry.getEndSym(), Entry.getBeginSym(), 4); |
| 1690 | |
| 1691 | emitDebugLocEntryLocation(Entry); |
David Blaikie | 9c550ac | 2014-03-25 01:44:02 +0000 | [diff] [blame] | 1692 | } |
David Blaikie | 94c1d7f | 2014-04-02 01:50:20 +0000 | [diff] [blame] | 1693 | Asm->EmitInt8(dwarf::DW_LLE_end_of_list_entry); |
Devang Patel | 9fc1170 | 2010-05-25 23:40:22 +0000 | [diff] [blame] | 1694 | } |
Bill Wendling | 480ff32 | 2009-05-20 23:21:38 +0000 | [diff] [blame] | 1695 | } |
| 1696 | |
Richard Mitton | 21101b3 | 2013-09-19 23:21:01 +0000 | [diff] [blame] | 1697 | struct ArangeSpan { |
| 1698 | const MCSymbol *Start, *End; |
| 1699 | }; |
| 1700 | |
| 1701 | // Emit a debug aranges section, containing a CU lookup for any |
| 1702 | // address we can tie back to a CU. |
Eric Christopher | 7b30f2e4 | 2012-11-21 00:34:35 +0000 | [diff] [blame] | 1703 | void DwarfDebug::emitDebugARanges() { |
Rafael Espindola | e8fd00d | 2015-02-26 22:02:02 +0000 | [diff] [blame] | 1704 | // Provides a unique id per text section. |
Rafael Espindola | 4f4ef15 | 2015-03-09 22:08:37 +0000 | [diff] [blame] | 1705 | MapVector<const MCSection *, SmallVector<SymbolCU, 8>> SectionMap; |
Richard Mitton | 21101b3 | 2013-09-19 23:21:01 +0000 | [diff] [blame] | 1706 | |
Rafael Espindola | e8fd00d | 2015-02-26 22:02:02 +0000 | [diff] [blame] | 1707 | // Filter labels by section. |
| 1708 | for (const SymbolCU &SCU : ArangeLabels) { |
| 1709 | if (SCU.Sym->isInSection()) { |
| 1710 | // Make a note of this symbol and it's section. |
| 1711 | const MCSection *Section = &SCU.Sym->getSection(); |
| 1712 | if (!Section->getKind().isMetadata()) |
| 1713 | SectionMap[Section].push_back(SCU); |
| 1714 | } else { |
| 1715 | // Some symbols (e.g. common/bss on mach-o) can have no section but still |
| 1716 | // appear in the output. This sucks as we rely on sections to build |
| 1717 | // arange spans. We can do it without, but it's icky. |
| 1718 | SectionMap[nullptr].push_back(SCU); |
| 1719 | } |
| 1720 | } |
Richard Mitton | 21101b3 | 2013-09-19 23:21:01 +0000 | [diff] [blame] | 1721 | |
Rafael Espindola | e8fd00d | 2015-02-26 22:02:02 +0000 | [diff] [blame] | 1722 | // Add terminating symbols for each section. |
Rafael Espindola | 4f4ef15 | 2015-03-09 22:08:37 +0000 | [diff] [blame] | 1723 | unsigned ID = 0; |
| 1724 | for (const auto &I : SectionMap) { |
| 1725 | const MCSection *Section = I.first; |
Rafael Espindola | e8fd00d | 2015-02-26 22:02:02 +0000 | [diff] [blame] | 1726 | MCSymbol *Sym = nullptr; |
| 1727 | |
| 1728 | if (Section) { |
| 1729 | // We can't call MCSection::getLabelEndName, as it's only safe to do so |
| 1730 | // if we know the section name up-front. For user-created sections, the |
| 1731 | // resulting label may not be valid to use as a label. (section names can |
| 1732 | // use a greater set of characters on some systems) |
| 1733 | Sym = Asm->GetTempSymbol("debug_end", ID); |
| 1734 | Asm->OutStreamer.SwitchSection(Section); |
| 1735 | Asm->OutStreamer.EmitLabel(Sym); |
| 1736 | } |
| 1737 | |
| 1738 | // Insert a final terminator. |
| 1739 | SectionMap[Section].push_back(SymbolCU(nullptr, Sym)); |
Rafael Espindola | 4f4ef15 | 2015-03-09 22:08:37 +0000 | [diff] [blame] | 1740 | ++ID; |
Rafael Espindola | e8fd00d | 2015-02-26 22:02:02 +0000 | [diff] [blame] | 1741 | } |
| 1742 | |
| 1743 | DenseMap<DwarfCompileUnit *, std::vector<ArangeSpan>> Spans; |
| 1744 | |
Rafael Espindola | 4f4ef15 | 2015-03-09 22:08:37 +0000 | [diff] [blame] | 1745 | for (auto &I : SectionMap) { |
| 1746 | const MCSection *Section = I.first; |
| 1747 | SmallVector<SymbolCU, 8> &List = I.second; |
Richard Mitton | 21101b3 | 2013-09-19 23:21:01 +0000 | [diff] [blame] | 1748 | if (List.size() < 2) |
| 1749 | continue; |
| 1750 | |
Rafael Espindola | 6ffb1d7 | 2015-02-02 19:22:51 +0000 | [diff] [blame] | 1751 | // If we have no section (e.g. common), just write out |
| 1752 | // individual spans for each symbol. |
| 1753 | if (!Section) { |
| 1754 | for (const SymbolCU &Cur : List) { |
| 1755 | ArangeSpan Span; |
| 1756 | Span.Start = Cur.Sym; |
| 1757 | Span.End = nullptr; |
| 1758 | if (Cur.CU) |
| 1759 | Spans[Cur.CU].push_back(Span); |
| 1760 | } |
| 1761 | continue; |
| 1762 | } |
| 1763 | |
Richard Mitton | 21101b3 | 2013-09-19 23:21:01 +0000 | [diff] [blame] | 1764 | // Sort the symbols by offset within the section. |
Benjamin Kramer | 571e2fe | 2014-03-07 19:41:22 +0000 | [diff] [blame] | 1765 | std::sort(List.begin(), List.end(), |
| 1766 | [&](const SymbolCU &A, const SymbolCU &B) { |
| 1767 | unsigned IA = A.Sym ? Asm->OutStreamer.GetSymbolOrder(A.Sym) : 0; |
| 1768 | unsigned IB = B.Sym ? Asm->OutStreamer.GetSymbolOrder(B.Sym) : 0; |
| 1769 | |
| 1770 | // Symbols with no order assigned should be placed at the end. |
| 1771 | // (e.g. section end labels) |
| 1772 | if (IA == 0) |
| 1773 | return false; |
| 1774 | if (IB == 0) |
| 1775 | return true; |
| 1776 | return IA < IB; |
| 1777 | }); |
Richard Mitton | 21101b3 | 2013-09-19 23:21:01 +0000 | [diff] [blame] | 1778 | |
Rafael Espindola | 6ffb1d7 | 2015-02-02 19:22:51 +0000 | [diff] [blame] | 1779 | // Build spans between each label. |
| 1780 | const MCSymbol *StartSym = List[0].Sym; |
| 1781 | for (size_t n = 1, e = List.size(); n < e; n++) { |
| 1782 | const SymbolCU &Prev = List[n - 1]; |
| 1783 | const SymbolCU &Cur = List[n]; |
Richard Mitton | 21101b3 | 2013-09-19 23:21:01 +0000 | [diff] [blame] | 1784 | |
Rafael Espindola | 6ffb1d7 | 2015-02-02 19:22:51 +0000 | [diff] [blame] | 1785 | // Try and build the longest span we can within the same CU. |
| 1786 | if (Cur.CU != Prev.CU) { |
| 1787 | ArangeSpan Span; |
| 1788 | Span.Start = StartSym; |
| 1789 | Span.End = Cur.Sym; |
| 1790 | Spans[Prev.CU].push_back(Span); |
| 1791 | StartSym = Cur.Sym; |
Richard Mitton | 21101b3 | 2013-09-19 23:21:01 +0000 | [diff] [blame] | 1792 | } |
| 1793 | } |
| 1794 | } |
| 1795 | |
Rafael Espindola | e8fd00d | 2015-02-26 22:02:02 +0000 | [diff] [blame] | 1796 | // Start the dwarf aranges section. |
| 1797 | Asm->OutStreamer.SwitchSection( |
| 1798 | Asm->getObjFileLowering().getDwarfARangesSection()); |
| 1799 | |
Richard Mitton | 21101b3 | 2013-09-19 23:21:01 +0000 | [diff] [blame] | 1800 | unsigned PtrSize = Asm->getDataLayout().getPointerSize(); |
| 1801 | |
| 1802 | // Build a list of CUs used. |
Eric Christopher | 4287a49 | 2013-12-09 23:57:44 +0000 | [diff] [blame] | 1803 | std::vector<DwarfCompileUnit *> CUs; |
Benjamin Kramer | 15596c7 | 2014-03-07 19:09:39 +0000 | [diff] [blame] | 1804 | for (const auto &it : Spans) { |
| 1805 | DwarfCompileUnit *CU = it.first; |
Richard Mitton | 21101b3 | 2013-09-19 23:21:01 +0000 | [diff] [blame] | 1806 | CUs.push_back(CU); |
| 1807 | } |
| 1808 | |
| 1809 | // Sort the CU list (again, to ensure consistent output order). |
Benjamin Kramer | 571e2fe | 2014-03-07 19:41:22 +0000 | [diff] [blame] | 1810 | std::sort(CUs.begin(), CUs.end(), [](const DwarfUnit *A, const DwarfUnit *B) { |
| 1811 | return A->getUniqueID() < B->getUniqueID(); |
| 1812 | }); |
Richard Mitton | 21101b3 | 2013-09-19 23:21:01 +0000 | [diff] [blame] | 1813 | |
| 1814 | // Emit an arange table for each CU we used. |
Benjamin Kramer | 15596c7 | 2014-03-07 19:09:39 +0000 | [diff] [blame] | 1815 | for (DwarfCompileUnit *CU : CUs) { |
Richard Mitton | 21101b3 | 2013-09-19 23:21:01 +0000 | [diff] [blame] | 1816 | std::vector<ArangeSpan> &List = Spans[CU]; |
| 1817 | |
David Blaikie | 27e35f2 | 2014-11-02 01:21:43 +0000 | [diff] [blame] | 1818 | // Describe the skeleton CU's offset and length, not the dwo file's. |
| 1819 | if (auto *Skel = CU->getSkeleton()) |
| 1820 | CU = Skel; |
| 1821 | |
Richard Mitton | 21101b3 | 2013-09-19 23:21:01 +0000 | [diff] [blame] | 1822 | // Emit size of content not including length itself. |
Eric Christopher | b4bef6d | 2013-11-19 09:04:36 +0000 | [diff] [blame] | 1823 | unsigned ContentSize = |
| 1824 | sizeof(int16_t) + // DWARF ARange version number |
| 1825 | sizeof(int32_t) + // Offset of CU in the .debug_info section |
| 1826 | sizeof(int8_t) + // Pointer Size (in bytes) |
| 1827 | sizeof(int8_t); // Segment Size (in bytes) |
Richard Mitton | 21101b3 | 2013-09-19 23:21:01 +0000 | [diff] [blame] | 1828 | |
| 1829 | unsigned TupleSize = PtrSize * 2; |
| 1830 | |
| 1831 | // 7.20 in the Dwarf specs requires the table to be aligned to a tuple. |
Benjamin Kramer | 8a68ab3 | 2014-01-07 19:28:14 +0000 | [diff] [blame] | 1832 | unsigned Padding = |
| 1833 | OffsetToAlignment(sizeof(int32_t) + ContentSize, TupleSize); |
Richard Mitton | 21101b3 | 2013-09-19 23:21:01 +0000 | [diff] [blame] | 1834 | |
| 1835 | ContentSize += Padding; |
| 1836 | ContentSize += (List.size() + 1) * TupleSize; |
| 1837 | |
| 1838 | // For each compile unit, write the list of spans it covers. |
| 1839 | Asm->OutStreamer.AddComment("Length of ARange Set"); |
| 1840 | Asm->EmitInt32(ContentSize); |
| 1841 | Asm->OutStreamer.AddComment("DWARF Arange version number"); |
| 1842 | Asm->EmitInt16(dwarf::DW_ARANGES_VERSION); |
| 1843 | Asm->OutStreamer.AddComment("Offset Into Debug Info Section"); |
Rafael Espindola | 063d725 | 2015-03-10 16:58:10 +0000 | [diff] [blame] | 1844 | Asm->emitSectionOffset(CU->getLabelBegin()); |
Richard Mitton | 21101b3 | 2013-09-19 23:21:01 +0000 | [diff] [blame] | 1845 | Asm->OutStreamer.AddComment("Address Size (in bytes)"); |
| 1846 | Asm->EmitInt8(PtrSize); |
| 1847 | Asm->OutStreamer.AddComment("Segment Size (in bytes)"); |
| 1848 | Asm->EmitInt8(0); |
| 1849 | |
Benjamin Kramer | 8a68ab3 | 2014-01-07 19:28:14 +0000 | [diff] [blame] | 1850 | Asm->OutStreamer.EmitFill(Padding, 0xff); |
Richard Mitton | 21101b3 | 2013-09-19 23:21:01 +0000 | [diff] [blame] | 1851 | |
Benjamin Kramer | 15596c7 | 2014-03-07 19:09:39 +0000 | [diff] [blame] | 1852 | for (const ArangeSpan &Span : List) { |
Richard Mitton | 21101b3 | 2013-09-19 23:21:01 +0000 | [diff] [blame] | 1853 | Asm->EmitLabelReference(Span.Start, PtrSize); |
| 1854 | |
| 1855 | // Calculate the size as being from the span start to it's end. |
Richard Mitton | 089ed89 | 2013-09-23 17:56:20 +0000 | [diff] [blame] | 1856 | if (Span.End) { |
Richard Mitton | 21101b3 | 2013-09-19 23:21:01 +0000 | [diff] [blame] | 1857 | Asm->EmitLabelDifference(Span.End, Span.Start, PtrSize); |
Richard Mitton | 089ed89 | 2013-09-23 17:56:20 +0000 | [diff] [blame] | 1858 | } else { |
| 1859 | // For symbols without an end marker (e.g. common), we |
| 1860 | // write a single arange entry containing just that one symbol. |
| 1861 | uint64_t Size = SymSize[Span.Start]; |
| 1862 | if (Size == 0) |
| 1863 | Size = 1; |
| 1864 | |
| 1865 | Asm->OutStreamer.EmitIntValue(Size, PtrSize); |
| 1866 | } |
Richard Mitton | 21101b3 | 2013-09-19 23:21:01 +0000 | [diff] [blame] | 1867 | } |
| 1868 | |
| 1869 | Asm->OutStreamer.AddComment("ARange terminator"); |
| 1870 | Asm->OutStreamer.EmitIntValue(0, PtrSize); |
| 1871 | Asm->OutStreamer.EmitIntValue(0, PtrSize); |
| 1872 | } |
Bill Wendling | 480ff32 | 2009-05-20 23:21:38 +0000 | [diff] [blame] | 1873 | } |
| 1874 | |
Eric Christopher | acdcbdb | 2012-11-27 22:43:45 +0000 | [diff] [blame] | 1875 | // Emit visible names into a debug ranges section. |
Devang Patel | 930143b | 2009-11-21 02:48:08 +0000 | [diff] [blame] | 1876 | void DwarfDebug::emitDebugRanges() { |
Bill Wendling | 480ff32 | 2009-05-20 23:21:38 +0000 | [diff] [blame] | 1877 | // Start the dwarf ranges section. |
Eric Christopher | b4bef6d | 2013-11-19 09:04:36 +0000 | [diff] [blame] | 1878 | Asm->OutStreamer.SwitchSection( |
| 1879 | Asm->getObjFileLowering().getDwarfRangesSection()); |
Eric Christopher | 4751d70 | 2013-11-23 00:05:29 +0000 | [diff] [blame] | 1880 | |
Eric Christopher | 0f63d06 | 2013-12-03 00:45:45 +0000 | [diff] [blame] | 1881 | // Size for our labels. |
| 1882 | unsigned char Size = Asm->getDataLayout().getPointerSize(); |
| 1883 | |
| 1884 | // Grab the specific ranges for the compile units in the module. |
Benjamin Kramer | 15596c7 | 2014-03-07 19:09:39 +0000 | [diff] [blame] | 1885 | for (const auto &I : CUMap) { |
| 1886 | DwarfCompileUnit *TheCU = I.second; |
Eric Christopher | 0f63d06 | 2013-12-03 00:45:45 +0000 | [diff] [blame] | 1887 | |
David Blaikie | 3a443c2 | 2014-11-04 22:12:25 +0000 | [diff] [blame] | 1888 | if (auto *Skel = TheCU->getSkeleton()) |
| 1889 | TheCU = Skel; |
| 1890 | |
Eric Christopher | 0f63d06 | 2013-12-03 00:45:45 +0000 | [diff] [blame] | 1891 | // Iterate over the misc ranges for the compile units in the module. |
Benjamin Kramer | 15596c7 | 2014-03-07 19:09:39 +0000 | [diff] [blame] | 1892 | for (const RangeSpanList &List : TheCU->getRangeLists()) { |
Eric Christopher | f879064 | 2013-12-04 22:04:50 +0000 | [diff] [blame] | 1893 | // Emit our symbol so we can find the beginning of the range. |
| 1894 | Asm->OutStreamer.EmitLabel(List.getSym()); |
Eric Christopher | 0f63d06 | 2013-12-03 00:45:45 +0000 | [diff] [blame] | 1895 | |
Benjamin Kramer | 15596c7 | 2014-03-07 19:09:39 +0000 | [diff] [blame] | 1896 | for (const RangeSpan &Range : List.getRanges()) { |
Eric Christopher | 0f63d06 | 2013-12-03 00:45:45 +0000 | [diff] [blame] | 1897 | const MCSymbol *Begin = Range.getStart(); |
| 1898 | const MCSymbol *End = Range.getEnd(); |
Eric Christopher | 565ab11 | 2013-12-20 04:34:22 +0000 | [diff] [blame] | 1899 | assert(Begin && "Range without a begin symbol?"); |
| 1900 | assert(End && "Range without an end symbol?"); |
David Blaikie | ce34349 | 2014-11-03 21:15:30 +0000 | [diff] [blame] | 1901 | if (auto *Base = TheCU->getBaseAddress()) { |
Eric Christopher | ece0e90 | 2014-04-25 22:23:54 +0000 | [diff] [blame] | 1902 | Asm->EmitLabelDifference(Begin, Base, Size); |
| 1903 | Asm->EmitLabelDifference(End, Base, Size); |
| 1904 | } else { |
| 1905 | Asm->OutStreamer.EmitSymbolValue(Begin, Size); |
| 1906 | Asm->OutStreamer.EmitSymbolValue(End, Size); |
| 1907 | } |
Eric Christopher | 0f63d06 | 2013-12-03 00:45:45 +0000 | [diff] [blame] | 1908 | } |
| 1909 | |
| 1910 | // And terminate the list with two 0 values. |
Eric Christopher | ce0cfce | 2013-01-09 01:35:34 +0000 | [diff] [blame] | 1911 | Asm->OutStreamer.EmitIntValue(0, Size); |
Eric Christopher | 0f63d06 | 2013-12-03 00:45:45 +0000 | [diff] [blame] | 1912 | Asm->OutStreamer.EmitIntValue(0, Size); |
| 1913 | } |
Devang Patel | 12563b3 | 2010-04-16 23:33:45 +0000 | [diff] [blame] | 1914 | } |
Bill Wendling | 480ff32 | 2009-05-20 23:21:38 +0000 | [diff] [blame] | 1915 | } |
| 1916 | |
Eric Christopher | d692c1d | 2012-12-11 19:42:09 +0000 | [diff] [blame] | 1917 | // DWARF5 Experimental Separate Dwarf emitters. |
Eric Christopher | 9c2ecd9 | 2012-11-30 23:59:06 +0000 | [diff] [blame] | 1918 | |
David Blaikie | 65a7466 | 2014-04-25 18:26:14 +0000 | [diff] [blame] | 1919 | void DwarfDebug::initSkeletonUnit(const DwarfUnit &U, DIE &Die, |
David Blaikie | f9b6a55 | 2014-04-22 22:39:41 +0000 | [diff] [blame] | 1920 | std::unique_ptr<DwarfUnit> NewU) { |
David Blaikie | cafd962 | 2014-11-02 08:51:37 +0000 | [diff] [blame] | 1921 | NewU->addString(Die, dwarf::DW_AT_GNU_dwo_name, |
David Blaikie | 4aa49b2 | 2014-11-02 08:52:37 +0000 | [diff] [blame] | 1922 | U.getCUNode().getSplitDebugFilename()); |
David Blaikie | 38fe634 | 2014-01-09 04:28:46 +0000 | [diff] [blame] | 1923 | |
David Blaikie | 38fe634 | 2014-01-09 04:28:46 +0000 | [diff] [blame] | 1924 | if (!CompilationDir.empty()) |
David Blaikie | cafd962 | 2014-11-02 08:51:37 +0000 | [diff] [blame] | 1925 | NewU->addString(Die, dwarf::DW_AT_comp_dir, CompilationDir); |
David Blaikie | 38fe634 | 2014-01-09 04:28:46 +0000 | [diff] [blame] | 1926 | |
David Blaikie | f9b6a55 | 2014-04-22 22:39:41 +0000 | [diff] [blame] | 1927 | addGnuPubAttributes(*NewU, Die); |
David Blaikie | 38fe634 | 2014-01-09 04:28:46 +0000 | [diff] [blame] | 1928 | |
David Blaikie | f9b6a55 | 2014-04-22 22:39:41 +0000 | [diff] [blame] | 1929 | SkeletonHolder.addUnit(std::move(NewU)); |
David Blaikie | 38fe634 | 2014-01-09 04:28:46 +0000 | [diff] [blame] | 1930 | } |
| 1931 | |
Eric Christopher | 9c2ecd9 | 2012-11-30 23:59:06 +0000 | [diff] [blame] | 1932 | // This DIE has the following attributes: DW_AT_comp_dir, DW_AT_stmt_list, |
| 1933 | // DW_AT_low_pc, DW_AT_high_pc, DW_AT_ranges, DW_AT_dwo_name, DW_AT_dwo_id, |
David Blaikie | 96dea05 | 2014-03-24 21:31:35 +0000 | [diff] [blame] | 1934 | // DW_AT_addr_base, DW_AT_ranges_base. |
David Blaikie | f9b6a55 | 2014-04-22 22:39:41 +0000 | [diff] [blame] | 1935 | DwarfCompileUnit &DwarfDebug::constructSkeletonCU(const DwarfCompileUnit &CU) { |
Eric Christopher | 9c2ecd9 | 2012-11-30 23:59:06 +0000 | [diff] [blame] | 1936 | |
David Blaikie | f9b6a55 | 2014-04-22 22:39:41 +0000 | [diff] [blame] | 1937 | auto OwnedUnit = make_unique<DwarfCompileUnit>( |
David Blaikie | bd57905 | 2014-04-28 21:14:27 +0000 | [diff] [blame] | 1938 | CU.getUniqueID(), CU.getCUNode(), Asm, this, &SkeletonHolder); |
David Blaikie | f9b6a55 | 2014-04-22 22:39:41 +0000 | [diff] [blame] | 1939 | DwarfCompileUnit &NewCU = *OwnedUnit; |
Rafael Espindola | 063d725 | 2015-03-10 16:58:10 +0000 | [diff] [blame] | 1940 | NewCU.initSection(Asm->getObjFileLowering().getDwarfInfoSection()); |
Eric Christopher | 4c7765f | 2013-01-17 03:00:04 +0000 | [diff] [blame] | 1941 | |
Rafael Espindola | 063d725 | 2015-03-10 16:58:10 +0000 | [diff] [blame] | 1942 | NewCU.initStmtList(); |
Eric Christopher | 9c2ecd9 | 2012-11-30 23:59:06 +0000 | [diff] [blame] | 1943 | |
David Blaikie | 92a2f8a | 2014-04-28 21:04:29 +0000 | [diff] [blame] | 1944 | initSkeletonUnit(CU, NewCU.getUnitDie(), std::move(OwnedUnit)); |
Eric Christopher | c8a310e | 2012-12-10 23:34:43 +0000 | [diff] [blame] | 1945 | |
Eric Christopher | 9c2ecd9 | 2012-11-30 23:59:06 +0000 | [diff] [blame] | 1946 | return NewCU; |
| 1947 | } |
| 1948 | |
Eric Christopher | d692c1d | 2012-12-11 19:42:09 +0000 | [diff] [blame] | 1949 | // Emit the .debug_info.dwo section for separated dwarf. This contains the |
| 1950 | // compile units that would normally be in debug_info. |
Eric Christopher | 9c2ecd9 | 2012-11-30 23:59:06 +0000 | [diff] [blame] | 1951 | void DwarfDebug::emitDebugInfoDWO() { |
Eric Christopher | cdf218d | 2012-12-10 19:51:21 +0000 | [diff] [blame] | 1952 | assert(useSplitDwarf() && "No split dwarf debug info?"); |
Rafael Espindola | 063d725 | 2015-03-10 16:58:10 +0000 | [diff] [blame] | 1953 | // Don't emit relocations into the dwo file. |
| 1954 | InfoHolder.emitUnits(/* UseOffsets */ true); |
Eric Christopher | 3c5a191 | 2012-12-19 22:02:53 +0000 | [diff] [blame] | 1955 | } |
| 1956 | |
| 1957 | // Emit the .debug_abbrev.dwo section for separated dwarf. This contains the |
| 1958 | // abbreviations for the .debug_info.dwo section. |
| 1959 | void DwarfDebug::emitDebugAbbrevDWO() { |
| 1960 | assert(useSplitDwarf() && "No split dwarf?"); |
David Blaikie | 0504cda | 2013-12-05 07:43:55 +0000 | [diff] [blame] | 1961 | InfoHolder.emitAbbrevs(Asm->getObjFileLowering().getDwarfAbbrevDWOSection()); |
Eric Christopher | 9c2ecd9 | 2012-11-30 23:59:06 +0000 | [diff] [blame] | 1962 | } |
Eric Christopher | 3bf29fd | 2012-12-27 02:14:01 +0000 | [diff] [blame] | 1963 | |
David Blaikie | 4a2f95f | 2014-03-18 01:17:26 +0000 | [diff] [blame] | 1964 | void DwarfDebug::emitDebugLineDWO() { |
| 1965 | assert(useSplitDwarf() && "No split dwarf?"); |
| 1966 | Asm->OutStreamer.SwitchSection( |
| 1967 | Asm->getObjFileLowering().getDwarfLineDWOSection()); |
David Blaikie | 8287aff | 2014-03-18 02:13:23 +0000 | [diff] [blame] | 1968 | SplitTypeUnitFileTable.Emit(Asm->OutStreamer); |
David Blaikie | 4a2f95f | 2014-03-18 01:17:26 +0000 | [diff] [blame] | 1969 | } |
| 1970 | |
Eric Christopher | 3bf29fd | 2012-12-27 02:14:01 +0000 | [diff] [blame] | 1971 | // Emit the .debug_str.dwo section for separated dwarf. This contains the |
| 1972 | // string section and is identical in format to traditional .debug_str |
| 1973 | // sections. |
| 1974 | void DwarfDebug::emitDebugStrDWO() { |
| 1975 | assert(useSplitDwarf() && "No split dwarf?"); |
Eric Christopher | b4bef6d | 2013-11-19 09:04:36 +0000 | [diff] [blame] | 1976 | const MCSection *OffSec = |
| 1977 | Asm->getObjFileLowering().getDwarfStrOffDWOSection(); |
Eric Christopher | 2cbd576 | 2013-01-07 19:32:41 +0000 | [diff] [blame] | 1978 | InfoHolder.emitStrings(Asm->getObjFileLowering().getDwarfStrDWOSection(), |
David Blaikie | 6741bb0 | 2014-09-11 21:12:48 +0000 | [diff] [blame] | 1979 | OffSec); |
Eric Christopher | 3bf29fd | 2012-12-27 02:14:01 +0000 | [diff] [blame] | 1980 | } |
David Blaikie | 409dd9c | 2013-11-19 23:08:21 +0000 | [diff] [blame] | 1981 | |
David Blaikie | 47f4b82 | 2014-03-19 00:11:28 +0000 | [diff] [blame] | 1982 | MCDwarfDwoLineTable *DwarfDebug::getDwoLineTable(const DwarfCompileUnit &CU) { |
| 1983 | if (!useSplitDwarf()) |
| 1984 | return nullptr; |
| 1985 | if (SingleCU) |
| 1986 | SplitTypeUnitFileTable.setCompilationDir(CU.getCUNode().getDirectory()); |
| 1987 | return &SplitTypeUnitFileTable; |
| 1988 | } |
| 1989 | |
David Blaikie | f3de2ab | 2014-04-26 16:26:41 +0000 | [diff] [blame] | 1990 | static uint64_t makeTypeSignature(StringRef Identifier) { |
| 1991 | MD5 Hash; |
| 1992 | Hash.update(Identifier); |
| 1993 | // ... take the least significant 8 bytes and return those. Our MD5 |
| 1994 | // implementation always returns its results in little endian, swap bytes |
| 1995 | // appropriately. |
| 1996 | MD5::MD5Result Result; |
| 1997 | Hash.final(Result); |
Rui Ueyama | 3206b79 | 2015-03-02 21:19:12 +0000 | [diff] [blame] | 1998 | return support::endian::read64le(Result + 8); |
David Blaikie | f3de2ab | 2014-04-26 16:26:41 +0000 | [diff] [blame] | 1999 | } |
| 2000 | |
David Blaikie | 15632ae | 2014-02-12 00:31:30 +0000 | [diff] [blame] | 2001 | void DwarfDebug::addDwarfTypeUnitType(DwarfCompileUnit &CU, |
David Blaikie | 65a7466 | 2014-04-25 18:26:14 +0000 | [diff] [blame] | 2002 | StringRef Identifier, DIE &RefDie, |
David Blaikie | f645f96 | 2014-01-09 03:23:41 +0000 | [diff] [blame] | 2003 | DICompositeType CTy) { |
David Blaikie | e12b49a | 2014-04-26 17:27:38 +0000 | [diff] [blame] | 2004 | // Fast path if we're building some type units and one has already used the |
| 2005 | // address pool we know we're going to throw away all this work anyway, so |
| 2006 | // don't bother building dependent types. |
| 2007 | if (!TypeUnitsUnderConstruction.empty() && AddrPool.hasBeenUsed()) |
| 2008 | return; |
| 2009 | |
David Blaikie | 47f615e | 2013-12-17 23:32:35 +0000 | [diff] [blame] | 2010 | const DwarfTypeUnit *&TU = DwarfTypeUnits[CTy]; |
Chandler Carruth | b587ab6 | 2014-01-20 08:07:07 +0000 | [diff] [blame] | 2011 | if (TU) { |
David Blaikie | 15632ae | 2014-02-12 00:31:30 +0000 | [diff] [blame] | 2012 | CU.addDIETypeSignature(RefDie, *TU); |
Chandler Carruth | b587ab6 | 2014-01-20 08:07:07 +0000 | [diff] [blame] | 2013 | return; |
David Blaikie | 409dd9c | 2013-11-19 23:08:21 +0000 | [diff] [blame] | 2014 | } |
| 2015 | |
David Blaikie | e12b49a | 2014-04-26 17:27:38 +0000 | [diff] [blame] | 2016 | bool TopLevelType = TypeUnitsUnderConstruction.empty(); |
| 2017 | AddrPool.resetUsedFlag(); |
| 2018 | |
David Blaikie | 29459ae | 2014-07-25 17:11:58 +0000 | [diff] [blame] | 2019 | auto OwnedUnit = make_unique<DwarfTypeUnit>( |
| 2020 | InfoHolder.getUnits().size() + TypeUnitsUnderConstruction.size(), CU, Asm, |
| 2021 | this, &InfoHolder, getDwoLineTable(CU)); |
David Blaikie | f9b6a55 | 2014-04-22 22:39:41 +0000 | [diff] [blame] | 2022 | DwarfTypeUnit &NewTU = *OwnedUnit; |
David Blaikie | 92a2f8a | 2014-04-28 21:04:29 +0000 | [diff] [blame] | 2023 | DIE &UnitDie = NewTU.getUnitDie(); |
David Blaikie | f9b6a55 | 2014-04-22 22:39:41 +0000 | [diff] [blame] | 2024 | TU = &NewTU; |
Eric Christopher | 793c747 | 2014-04-28 20:42:22 +0000 | [diff] [blame] | 2025 | TypeUnitsUnderConstruction.push_back( |
| 2026 | std::make_pair(std::move(OwnedUnit), CTy)); |
Chandler Carruth | b587ab6 | 2014-01-20 08:07:07 +0000 | [diff] [blame] | 2027 | |
David Blaikie | 92a2f8a | 2014-04-28 21:04:29 +0000 | [diff] [blame] | 2028 | NewTU.addUInt(UnitDie, dwarf::DW_AT_language, dwarf::DW_FORM_data2, |
David Blaikie | 637cac4 | 2014-04-22 23:09:36 +0000 | [diff] [blame] | 2029 | CU.getLanguage()); |
Chandler Carruth | b587ab6 | 2014-01-20 08:07:07 +0000 | [diff] [blame] | 2030 | |
David Blaikie | f3de2ab | 2014-04-26 16:26:41 +0000 | [diff] [blame] | 2031 | uint64_t Signature = makeTypeSignature(Identifier); |
David Blaikie | f9b6a55 | 2014-04-22 22:39:41 +0000 | [diff] [blame] | 2032 | NewTU.setTypeSignature(Signature); |
David Blaikie | f3de2ab | 2014-04-26 16:26:41 +0000 | [diff] [blame] | 2033 | |
David Blaikie | 29459ae | 2014-07-25 17:11:58 +0000 | [diff] [blame] | 2034 | if (useSplitDwarf()) |
David Blaikie | a34568b | 2014-11-01 20:06:28 +0000 | [diff] [blame] | 2035 | NewTU.initSection(Asm->getObjFileLowering().getDwarfTypesDWOSection()); |
David Blaikie | 29459ae | 2014-07-25 17:11:58 +0000 | [diff] [blame] | 2036 | else { |
David Blaikie | 92a2f8a | 2014-04-28 21:04:29 +0000 | [diff] [blame] | 2037 | CU.applyStmtList(UnitDie); |
David Blaikie | 29459ae | 2014-07-25 17:11:58 +0000 | [diff] [blame] | 2038 | NewTU.initSection( |
| 2039 | Asm->getObjFileLowering().getDwarfTypesSection(Signature)); |
| 2040 | } |
Chandler Carruth | b587ab6 | 2014-01-20 08:07:07 +0000 | [diff] [blame] | 2041 | |
David Blaikie | f3de2ab | 2014-04-26 16:26:41 +0000 | [diff] [blame] | 2042 | NewTU.setType(NewTU.createTypeDIE(CTy)); |
| 2043 | |
David Blaikie | e12b49a | 2014-04-26 17:27:38 +0000 | [diff] [blame] | 2044 | if (TopLevelType) { |
| 2045 | auto TypeUnitsToAdd = std::move(TypeUnitsUnderConstruction); |
| 2046 | TypeUnitsUnderConstruction.clear(); |
| 2047 | |
| 2048 | // Types referencing entries in the address table cannot be placed in type |
| 2049 | // units. |
| 2050 | if (AddrPool.hasBeenUsed()) { |
| 2051 | |
| 2052 | // Remove all the types built while building this type. |
| 2053 | // This is pessimistic as some of these types might not be dependent on |
| 2054 | // the type that used an address. |
| 2055 | for (const auto &TU : TypeUnitsToAdd) |
| 2056 | DwarfTypeUnits.erase(TU.second); |
| 2057 | |
| 2058 | // Construct this type in the CU directly. |
| 2059 | // This is inefficient because all the dependent types will be rebuilt |
| 2060 | // from scratch, including building them in type units, discovering that |
| 2061 | // they depend on addresses, throwing them out and rebuilding them. |
| 2062 | CU.constructTypeDIE(RefDie, CTy); |
| 2063 | return; |
| 2064 | } |
| 2065 | |
| 2066 | // If the type wasn't dependent on fission addresses, finish adding the type |
| 2067 | // and all its dependent types. |
David Blaikie | c13bc97 | 2014-08-27 05:04:14 +0000 | [diff] [blame] | 2068 | for (auto &TU : TypeUnitsToAdd) |
David Blaikie | e12b49a | 2014-04-26 17:27:38 +0000 | [diff] [blame] | 2069 | InfoHolder.addUnit(std::move(TU.first)); |
David Blaikie | e12b49a | 2014-04-26 17:27:38 +0000 | [diff] [blame] | 2070 | } |
David Blaikie | f9b6a55 | 2014-04-22 22:39:41 +0000 | [diff] [blame] | 2071 | CU.addDIETypeSignature(RefDie, NewTU); |
David Blaikie | 409dd9c | 2013-11-19 23:08:21 +0000 | [diff] [blame] | 2072 | } |
David Blaikie | 4bd13b7 | 2014-03-07 18:49:45 +0000 | [diff] [blame] | 2073 | |
David Blaikie | 2406a062 | 2014-04-23 23:37:35 +0000 | [diff] [blame] | 2074 | // Accelerator table mutators - add each name along with its companion |
| 2075 | // DIE to the proper table while ensuring that the name that we're going |
| 2076 | // to reference is in the string table. We do this since the names we |
| 2077 | // add may not only be identical to the names in the DIE. |
David Blaikie | b0b3fcf | 2014-04-25 18:52:29 +0000 | [diff] [blame] | 2078 | void DwarfDebug::addAccelName(StringRef Name, const DIE &Die) { |
David Blaikie | 2406a062 | 2014-04-23 23:37:35 +0000 | [diff] [blame] | 2079 | if (!useDwarfAccelTables()) |
| 2080 | return; |
David Blaikie | 772ab8a | 2014-04-25 22:21:35 +0000 | [diff] [blame] | 2081 | AccelNames.AddName(Name, InfoHolder.getStringPool().getSymbol(*Asm, Name), |
| 2082 | &Die); |
David Blaikie | 2406a062 | 2014-04-23 23:37:35 +0000 | [diff] [blame] | 2083 | } |
David Blaikie | 0ee82b9 | 2014-04-24 00:53:32 +0000 | [diff] [blame] | 2084 | |
David Blaikie | b0b3fcf | 2014-04-25 18:52:29 +0000 | [diff] [blame] | 2085 | void DwarfDebug::addAccelObjC(StringRef Name, const DIE &Die) { |
David Blaikie | 0ee82b9 | 2014-04-24 00:53:32 +0000 | [diff] [blame] | 2086 | if (!useDwarfAccelTables()) |
| 2087 | return; |
David Blaikie | 772ab8a | 2014-04-25 22:21:35 +0000 | [diff] [blame] | 2088 | AccelObjC.AddName(Name, InfoHolder.getStringPool().getSymbol(*Asm, Name), |
| 2089 | &Die); |
David Blaikie | 0ee82b9 | 2014-04-24 00:53:32 +0000 | [diff] [blame] | 2090 | } |
David Blaikie | ecf0415 | 2014-04-24 01:02:42 +0000 | [diff] [blame] | 2091 | |
David Blaikie | b0b3fcf | 2014-04-25 18:52:29 +0000 | [diff] [blame] | 2092 | void DwarfDebug::addAccelNamespace(StringRef Name, const DIE &Die) { |
David Blaikie | ecf0415 | 2014-04-24 01:02:42 +0000 | [diff] [blame] | 2093 | if (!useDwarfAccelTables()) |
| 2094 | return; |
David Blaikie | 772ab8a | 2014-04-25 22:21:35 +0000 | [diff] [blame] | 2095 | AccelNamespace.AddName(Name, InfoHolder.getStringPool().getSymbol(*Asm, Name), |
| 2096 | &Die); |
David Blaikie | ecf0415 | 2014-04-24 01:02:42 +0000 | [diff] [blame] | 2097 | } |
David Blaikie | 18d3375 | 2014-04-24 01:23:49 +0000 | [diff] [blame] | 2098 | |
David Blaikie | b0b3fcf | 2014-04-25 18:52:29 +0000 | [diff] [blame] | 2099 | void DwarfDebug::addAccelType(StringRef Name, const DIE &Die, char Flags) { |
David Blaikie | 18d3375 | 2014-04-24 01:23:49 +0000 | [diff] [blame] | 2100 | if (!useDwarfAccelTables()) |
| 2101 | return; |
David Blaikie | 772ab8a | 2014-04-25 22:21:35 +0000 | [diff] [blame] | 2102 | AccelTypes.AddName(Name, InfoHolder.getStringPool().getSymbol(*Asm, Name), |
| 2103 | &Die); |
David Blaikie | 18d3375 | 2014-04-24 01:23:49 +0000 | [diff] [blame] | 2104 | } |