1 //===--- lib/CodeGen/DIE.cpp - DWARF Info Entries -------------------------===// 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 // Data structures for DWARF info entries. 11 // 12 //===----------------------------------------------------------------------===// 13 14 #include "DIE.h" 15 #include "llvm/ADT/Twine.h" 16 #include "llvm/CodeGen/AsmPrinter.h" 17 #include "llvm/MC/MCAsmInfo.h" 18 #include "llvm/MC/MCStreamer.h" 19 #include "llvm/MC/MCSymbol.h" 20 #include "llvm/Target/TargetData.h" 21 #include "llvm/Support/Allocator.h" 22 #include "llvm/Support/Debug.h" 23 #include "llvm/Support/ErrorHandling.h" 24 #include "llvm/Support/Format.h" 25 #include "llvm/Support/FormattedStream.h" 26 using namespace llvm; 27 28 //===----------------------------------------------------------------------===// 29 // DIEAbbrevData Implementation 30 //===----------------------------------------------------------------------===// 31 32 /// Profile - Used to gather unique data for the abbreviation folding set. 33 /// 34 void DIEAbbrevData::Profile(FoldingSetNodeID &ID) const { 35 ID.AddInteger(Attribute); 36 ID.AddInteger(Form); 37 } 38 39 //===----------------------------------------------------------------------===// 40 // DIEAbbrev Implementation 41 //===----------------------------------------------------------------------===// 42 43 /// Profile - Used to gather unique data for the abbreviation folding set. 44 /// 45 void DIEAbbrev::Profile(FoldingSetNodeID &ID) const { 46 ID.AddInteger(Tag); 47 ID.AddInteger(ChildrenFlag); 48 49 // For each attribute description. 50 for (unsigned i = 0, N = Data.size(); i < N; ++i) 51 Data[i].Profile(ID); 52 } 53 54 /// Emit - Print the abbreviation using the specified asm printer. 55 /// 56 void DIEAbbrev::Emit(AsmPrinter *AP) const { 57 // Emit its Dwarf tag type. 58 // FIXME: Doing work even in non-asm-verbose runs. 59 AP->EmitULEB128(Tag, dwarf::TagString(Tag)); 60 61 // Emit whether it has children DIEs. 62 // FIXME: Doing work even in non-asm-verbose runs. 63 AP->EmitULEB128(ChildrenFlag, dwarf::ChildrenString(ChildrenFlag)); 64 65 // For each attribute description. 66 for (unsigned i = 0, N = Data.size(); i < N; ++i) { 67 const DIEAbbrevData &AttrData = Data[i]; 68 69 // Emit attribute type. 70 // FIXME: Doing work even in non-asm-verbose runs. 71 AP->EmitULEB128(AttrData.getAttribute(), 72 dwarf::AttributeString(AttrData.getAttribute())); 73 74 // Emit form type. 75 // FIXME: Doing work even in non-asm-verbose runs. 76 AP->EmitULEB128(AttrData.getForm(), 77 dwarf::FormEncodingString(AttrData.getForm())); 78 } 79 80 // Mark end of abbreviation. 81 AP->EmitULEB128(0, "EOM(1)"); 82 AP->EmitULEB128(0, "EOM(2)"); 83 } 84 85 #ifndef NDEBUG 86 void DIEAbbrev::print(raw_ostream &O) { 87 O << "Abbreviation @" 88 << format("0x%lx", (long)(intptr_t)this) 89 << " " 90 << dwarf::TagString(Tag) 91 << " " 92 << dwarf::ChildrenString(ChildrenFlag) 93 << '\n'; 94 95 for (unsigned i = 0, N = Data.size(); i < N; ++i) { 96 O << " " 97 << dwarf::AttributeString(Data[i].getAttribute()) 98 << " " 99 << dwarf::FormEncodingString(Data[i].getForm()) 100 << '\n'; 101 } 102 } 103 void DIEAbbrev::dump() { print(dbgs()); } 104 #endif 105 106 //===----------------------------------------------------------------------===// 107 // DIE Implementation 108 //===----------------------------------------------------------------------===// 109 110 DIE::~DIE() { 111 for (unsigned i = 0, N = Children.size(); i < N; ++i) 112 delete Children[i]; 113 } 114 115 #ifndef NDEBUG 116 void DIE::print(raw_ostream &O, unsigned IncIndent) { 117 IndentCount += IncIndent; 118 const std::string Indent(IndentCount, ' '); 119 bool isBlock = Abbrev.getTag() == 0; 120 121 if (!isBlock) { 122 O << Indent 123 << "Die: " 124 << format("0x%lx", (long)(intptr_t)this) 125 << ", Offset: " << Offset 126 << ", Size: " << Size << "\n"; 127 128 O << Indent 129 << dwarf::TagString(Abbrev.getTag()) 130 << " " 131 << dwarf::ChildrenString(Abbrev.getChildrenFlag()) << "\n"; 132 } else { 133 O << "Size: " << Size << "\n"; 134 } 135 136 const SmallVector<DIEAbbrevData, 8> &Data = Abbrev.getData(); 137 138 IndentCount += 2; 139 for (unsigned i = 0, N = Data.size(); i < N; ++i) { 140 O << Indent; 141 142 if (!isBlock) 143 O << dwarf::AttributeString(Data[i].getAttribute()); 144 else 145 O << "Blk[" << i << "]"; 146 147 O << " " 148 << dwarf::FormEncodingString(Data[i].getForm()) 149 << " "; 150 Values[i]->print(O); 151 O << "\n"; 152 } 153 IndentCount -= 2; 154 155 for (unsigned j = 0, M = Children.size(); j < M; ++j) { 156 Children[j]->print(O, 4); 157 } 158 159 if (!isBlock) O << "\n"; 160 IndentCount -= IncIndent; 161 } 162 163 void DIE::dump() { 164 print(dbgs()); 165 } 166 #endif 167 168 void DIEValue::anchor() { } 169 170 #ifndef NDEBUG 171 void DIEValue::dump() { 172 print(dbgs()); 173 } 174 #endif 175 176 //===----------------------------------------------------------------------===// 177 // DIEInteger Implementation 178 //===----------------------------------------------------------------------===// 179 180 /// EmitValue - Emit integer of appropriate size. 181 /// 182 void DIEInteger::EmitValue(AsmPrinter *Asm, unsigned Form) const { 183 unsigned Size = ~0U; 184 switch (Form) { 185 case dwarf::DW_FORM_flag: // Fall thru 186 case dwarf::DW_FORM_ref1: // Fall thru 187 case dwarf::DW_FORM_data1: Size = 1; break; 188 case dwarf::DW_FORM_ref2: // Fall thru 189 case dwarf::DW_FORM_data2: Size = 2; break; 190 case dwarf::DW_FORM_ref4: // Fall thru 191 case dwarf::DW_FORM_data4: Size = 4; break; 192 case dwarf::DW_FORM_ref8: // Fall thru 193 case dwarf::DW_FORM_data8: Size = 8; break; 194 case dwarf::DW_FORM_udata: Asm->EmitULEB128(Integer); return; 195 case dwarf::DW_FORM_sdata: Asm->EmitSLEB128(Integer); return; 196 case dwarf::DW_FORM_addr: Size = Asm->getTargetData().getPointerSize(); break; 197 default: llvm_unreachable("DIE Value form not supported yet"); 198 } 199 Asm->OutStreamer.EmitIntValue(Integer, Size, 0/*addrspace*/); 200 } 201 202 /// SizeOf - Determine size of integer value in bytes. 203 /// 204 unsigned DIEInteger::SizeOf(AsmPrinter *AP, unsigned Form) const { 205 switch (Form) { 206 case dwarf::DW_FORM_flag: // Fall thru 207 case dwarf::DW_FORM_ref1: // Fall thru 208 case dwarf::DW_FORM_data1: return sizeof(int8_t); 209 case dwarf::DW_FORM_ref2: // Fall thru 210 case dwarf::DW_FORM_data2: return sizeof(int16_t); 211 case dwarf::DW_FORM_ref4: // Fall thru 212 case dwarf::DW_FORM_data4: return sizeof(int32_t); 213 case dwarf::DW_FORM_ref8: // Fall thru 214 case dwarf::DW_FORM_data8: return sizeof(int64_t); 215 case dwarf::DW_FORM_udata: return MCAsmInfo::getULEB128Size(Integer); 216 case dwarf::DW_FORM_sdata: return MCAsmInfo::getSLEB128Size(Integer); 217 case dwarf::DW_FORM_addr: return AP->getTargetData().getPointerSize(); 218 default: llvm_unreachable("DIE Value form not supported yet"); 219 } 220 } 221 222 #ifndef NDEBUG 223 void DIEInteger::print(raw_ostream &O) { 224 O << "Int: " << (int64_t)Integer << " 0x"; 225 O.write_hex(Integer); 226 } 227 #endif 228 229 //===----------------------------------------------------------------------===// 230 // DIELabel Implementation 231 //===----------------------------------------------------------------------===// 232 233 /// EmitValue - Emit label value. 234 /// 235 void DIELabel::EmitValue(AsmPrinter *AP, unsigned Form) const { 236 AP->OutStreamer.EmitSymbolValue(Label, SizeOf(AP, Form), 0/*AddrSpace*/); 237 } 238 239 /// SizeOf - Determine size of label value in bytes. 240 /// 241 unsigned DIELabel::SizeOf(AsmPrinter *AP, unsigned Form) const { 242 if (Form == dwarf::DW_FORM_data4) return 4; 243 if (Form == dwarf::DW_FORM_strp) return 4; 244 return AP->getTargetData().getPointerSize(); 245 } 246 247 #ifndef NDEBUG 248 void DIELabel::print(raw_ostream &O) { 249 O << "Lbl: " << Label->getName(); 250 } 251 #endif 252 253 //===----------------------------------------------------------------------===// 254 // DIEDelta Implementation 255 //===----------------------------------------------------------------------===// 256 257 /// EmitValue - Emit delta value. 258 /// 259 void DIEDelta::EmitValue(AsmPrinter *AP, unsigned Form) const { 260 AP->EmitLabelDifference(LabelHi, LabelLo, SizeOf(AP, Form)); 261 } 262 263 /// SizeOf - Determine size of delta value in bytes. 264 /// 265 unsigned DIEDelta::SizeOf(AsmPrinter *AP, unsigned Form) const { 266 if (Form == dwarf::DW_FORM_data4) return 4; 267 if (Form == dwarf::DW_FORM_strp) return 4; 268 return AP->getTargetData().getPointerSize(); 269 } 270 271 #ifndef NDEBUG 272 void DIEDelta::print(raw_ostream &O) { 273 O << "Del: " << LabelHi->getName() << "-" << LabelLo->getName(); 274 } 275 #endif 276 277 //===----------------------------------------------------------------------===// 278 // DIEEntry Implementation 279 //===----------------------------------------------------------------------===// 280 281 /// EmitValue - Emit debug information entry offset. 282 /// 283 void DIEEntry::EmitValue(AsmPrinter *AP, unsigned Form) const { 284 AP->EmitInt32(Entry->getOffset()); 285 } 286 287 #ifndef NDEBUG 288 void DIEEntry::print(raw_ostream &O) { 289 O << format("Die: 0x%lx", (long)(intptr_t)Entry); 290 } 291 #endif 292 293 //===----------------------------------------------------------------------===// 294 // DIEBlock Implementation 295 //===----------------------------------------------------------------------===// 296 297 /// ComputeSize - calculate the size of the block. 298 /// 299 unsigned DIEBlock::ComputeSize(AsmPrinter *AP) { 300 if (!Size) { 301 const SmallVector<DIEAbbrevData, 8> &AbbrevData = Abbrev.getData(); 302 for (unsigned i = 0, N = Values.size(); i < N; ++i) 303 Size += Values[i]->SizeOf(AP, AbbrevData[i].getForm()); 304 } 305 306 return Size; 307 } 308 309 /// EmitValue - Emit block data. 310 /// 311 void DIEBlock::EmitValue(AsmPrinter *Asm, unsigned Form) const { 312 switch (Form) { 313 default: llvm_unreachable("Improper form for block"); 314 case dwarf::DW_FORM_block1: Asm->EmitInt8(Size); break; 315 case dwarf::DW_FORM_block2: Asm->EmitInt16(Size); break; 316 case dwarf::DW_FORM_block4: Asm->EmitInt32(Size); break; 317 case dwarf::DW_FORM_block: Asm->EmitULEB128(Size); break; 318 } 319 320 const SmallVector<DIEAbbrevData, 8> &AbbrevData = Abbrev.getData(); 321 for (unsigned i = 0, N = Values.size(); i < N; ++i) 322 Values[i]->EmitValue(Asm, AbbrevData[i].getForm()); 323 } 324 325 /// SizeOf - Determine size of block data in bytes. 326 /// 327 unsigned DIEBlock::SizeOf(AsmPrinter *AP, unsigned Form) const { 328 switch (Form) { 329 case dwarf::DW_FORM_block1: return Size + sizeof(int8_t); 330 case dwarf::DW_FORM_block2: return Size + sizeof(int16_t); 331 case dwarf::DW_FORM_block4: return Size + sizeof(int32_t); 332 case dwarf::DW_FORM_block: return Size + MCAsmInfo::getULEB128Size(Size); 333 default: llvm_unreachable("Improper form for block"); 334 } 335 } 336 337 #ifndef NDEBUG 338 void DIEBlock::print(raw_ostream &O) { 339 O << "Blk: "; 340 DIE::print(O, 5); 341 } 342 #endif 343
