1 //===--- lib/CodeGen/DIE.cpp - DWARF Info Entries -------------------------===//
3 // The LLVM Compiler Infrastructure
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
10 // Data structures for DWARF info entries.
12 //===----------------------------------------------------------------------===//
15 #include "DwarfDebug.h"
16 #include "llvm/ADT/Twine.h"
17 #include "llvm/CodeGen/AsmPrinter.h"
18 #include "llvm/IR/DataLayout.h"
19 #include "llvm/MC/MCAsmInfo.h"
20 #include "llvm/MC/MCStreamer.h"
21 #include "llvm/MC/MCSymbol.h"
22 #include "llvm/Support/Allocator.h"
23 #include "llvm/Support/Debug.h"
24 #include "llvm/Support/ErrorHandling.h"
25 #include "llvm/Support/Format.h"
26 #include "llvm/Support/FormattedStream.h"
27 #include "llvm/Support/MD5.h"
30 //===----------------------------------------------------------------------===//
31 // DIEAbbrevData Implementation
32 //===----------------------------------------------------------------------===//
34 /// Profile - Used to gather unique data for the abbreviation folding set.
36 void DIEAbbrevData::Profile(FoldingSetNodeID &ID) const {
37 ID.AddInteger(Attribute);
41 //===----------------------------------------------------------------------===//
42 // DIEAbbrev Implementation
43 //===----------------------------------------------------------------------===//
45 /// Profile - Used to gather unique data for the abbreviation folding set.
47 void DIEAbbrev::Profile(FoldingSetNodeID &ID) const {
49 ID.AddInteger(ChildrenFlag);
51 // For each attribute description.
52 for (unsigned i = 0, N = Data.size(); i < N; ++i)
56 /// Emit - Print the abbreviation using the specified asm printer.
58 void DIEAbbrev::Emit(AsmPrinter *AP) const {
59 // Emit its Dwarf tag type.
60 AP->EmitULEB128(Tag, dwarf::TagString(Tag));
62 // Emit whether it has children DIEs.
63 AP->EmitULEB128(ChildrenFlag, dwarf::ChildrenString(ChildrenFlag));
65 // For each attribute description.
66 for (unsigned i = 0, N = Data.size(); i < N; ++i) {
67 const DIEAbbrevData &AttrData = Data[i];
69 // Emit attribute type.
70 AP->EmitULEB128(AttrData.getAttribute(),
71 dwarf::AttributeString(AttrData.getAttribute()));
74 AP->EmitULEB128(AttrData.getForm(),
75 dwarf::FormEncodingString(AttrData.getForm()));
78 // Mark end of abbreviation.
79 AP->EmitULEB128(0, "EOM(1)");
80 AP->EmitULEB128(0, "EOM(2)");
84 void DIEAbbrev::print(raw_ostream &O) {
86 << format("0x%lx", (long)(intptr_t)this)
88 << dwarf::TagString(Tag)
90 << dwarf::ChildrenString(ChildrenFlag)
93 for (unsigned i = 0, N = Data.size(); i < N; ++i) {
95 << dwarf::AttributeString(Data[i].getAttribute())
97 << dwarf::FormEncodingString(Data[i].getForm())
101 void DIEAbbrev::dump() { print(dbgs()); }
104 //===----------------------------------------------------------------------===//
105 // DIE Implementation
106 //===----------------------------------------------------------------------===//
109 for (unsigned i = 0, N = Children.size(); i < N; ++i)
113 /// Climb up the parent chain to get the compile unit DIE to which this DIE
115 DIE *DIE::getCompileUnit() {
116 DIE *Cu = checkCompileUnit();
117 assert(Cu && "We should not have orphaned DIEs.");
121 /// Climb up the parent chain to get the compile unit DIE this DIE belongs
122 /// to. Return NULL if DIE is not added to an owner yet.
123 DIE *DIE::checkCompileUnit() {
126 if (p->getTag() == dwarf::DW_TAG_compile_unit)
133 DIEValue *DIE::findAttribute(uint16_t Attribute) {
134 const SmallVectorImpl<DIEValue *> &Values = getValues();
135 const DIEAbbrev &Abbrevs = getAbbrev();
137 // Iterate through all the attributes until we find the one we're
138 // looking for, if we can't find it return NULL.
139 for (size_t i = 0; i < Values.size(); ++i)
140 if (Abbrevs.getData()[i].getAttribute() == Attribute)
146 void DIE::print(raw_ostream &O, unsigned IndentCount) const {
147 const std::string Indent(IndentCount, ' ');
148 bool isBlock = Abbrev.getTag() == 0;
153 << format("0x%lx", (long)(intptr_t)this)
154 << ", Offset: " << Offset
155 << ", Size: " << Size << "\n";
158 << dwarf::TagString(Abbrev.getTag())
160 << dwarf::ChildrenString(Abbrev.getChildrenFlag()) << "\n";
162 O << "Size: " << Size << "\n";
165 const SmallVectorImpl<DIEAbbrevData> &Data = Abbrev.getData();
168 for (unsigned i = 0, N = Data.size(); i < N; ++i) {
172 O << dwarf::AttributeString(Data[i].getAttribute());
174 O << "Blk[" << i << "]";
177 << dwarf::FormEncodingString(Data[i].getForm())
184 for (unsigned j = 0, M = Children.size(); j < M; ++j) {
185 Children[j]->print(O, IndentCount+4);
188 if (!isBlock) O << "\n";
196 void DIEValue::anchor() { }
199 void DIEValue::dump() const {
204 //===----------------------------------------------------------------------===//
205 // DIEInteger Implementation
206 //===----------------------------------------------------------------------===//
208 /// EmitValue - Emit integer of appropriate size.
210 void DIEInteger::EmitValue(AsmPrinter *Asm, uint16_t Form) const {
213 case dwarf::DW_FORM_flag_present:
214 // Emit something to keep the lines and comments in sync.
215 // FIXME: Is there a better way to do this?
216 if (Asm->OutStreamer.hasRawTextSupport())
217 Asm->OutStreamer.EmitRawText(StringRef(""));
219 case dwarf::DW_FORM_flag: // Fall thru
220 case dwarf::DW_FORM_ref1: // Fall thru
221 case dwarf::DW_FORM_data1: Size = 1; break;
222 case dwarf::DW_FORM_ref2: // Fall thru
223 case dwarf::DW_FORM_data2: Size = 2; break;
224 case dwarf::DW_FORM_sec_offset: // Fall thru
225 case dwarf::DW_FORM_ref4: // Fall thru
226 case dwarf::DW_FORM_data4: Size = 4; break;
227 case dwarf::DW_FORM_ref8: // Fall thru
228 case dwarf::DW_FORM_data8: Size = 8; break;
229 case dwarf::DW_FORM_GNU_str_index: Asm->EmitULEB128(Integer); return;
230 case dwarf::DW_FORM_GNU_addr_index: Asm->EmitULEB128(Integer); return;
231 case dwarf::DW_FORM_udata: Asm->EmitULEB128(Integer); return;
232 case dwarf::DW_FORM_sdata: Asm->EmitSLEB128(Integer); return;
233 case dwarf::DW_FORM_addr:
234 Size = Asm->getDataLayout().getPointerSize(); break;
235 default: llvm_unreachable("DIE Value form not supported yet");
237 Asm->OutStreamer.EmitIntValue(Integer, Size);
240 /// SizeOf - Determine size of integer value in bytes.
242 unsigned DIEInteger::SizeOf(AsmPrinter *AP, uint16_t Form) const {
244 case dwarf::DW_FORM_flag_present: return 0;
245 case dwarf::DW_FORM_flag: // Fall thru
246 case dwarf::DW_FORM_ref1: // Fall thru
247 case dwarf::DW_FORM_data1: return sizeof(int8_t);
248 case dwarf::DW_FORM_ref2: // Fall thru
249 case dwarf::DW_FORM_data2: return sizeof(int16_t);
250 case dwarf::DW_FORM_sec_offset: // Fall thru
251 case dwarf::DW_FORM_ref4: // Fall thru
252 case dwarf::DW_FORM_data4: return sizeof(int32_t);
253 case dwarf::DW_FORM_ref8: // Fall thru
254 case dwarf::DW_FORM_data8: return sizeof(int64_t);
255 case dwarf::DW_FORM_GNU_str_index: return MCAsmInfo::getULEB128Size(Integer);
256 case dwarf::DW_FORM_GNU_addr_index: return MCAsmInfo::getULEB128Size(Integer);
257 case dwarf::DW_FORM_udata: return MCAsmInfo::getULEB128Size(Integer);
258 case dwarf::DW_FORM_sdata: return MCAsmInfo::getSLEB128Size(Integer);
259 case dwarf::DW_FORM_addr: return AP->getDataLayout().getPointerSize();
260 default: llvm_unreachable("DIE Value form not supported yet");
265 void DIEInteger::print(raw_ostream &O) const {
266 O << "Int: " << (int64_t)Integer << " 0x";
267 O.write_hex(Integer);
271 //===----------------------------------------------------------------------===//
272 // DIEExpr Implementation
273 //===----------------------------------------------------------------------===//
275 /// EmitValue - Emit expression value.
277 void DIEExpr::EmitValue(AsmPrinter *AP, uint16_t Form) const {
278 AP->OutStreamer.EmitValue(Expr, SizeOf(AP, Form));
281 /// SizeOf - Determine size of expression value in bytes.
283 unsigned DIEExpr::SizeOf(AsmPrinter *AP, uint16_t Form) const {
284 if (Form == dwarf::DW_FORM_data4) return 4;
285 if (Form == dwarf::DW_FORM_sec_offset) return 4;
286 if (Form == dwarf::DW_FORM_strp) return 4;
287 return AP->getDataLayout().getPointerSize();
291 void DIEExpr::print(raw_ostream &O) const {
297 //===----------------------------------------------------------------------===//
298 // DIELabel Implementation
299 //===----------------------------------------------------------------------===//
301 /// EmitValue - Emit label value.
303 void DIELabel::EmitValue(AsmPrinter *AP, uint16_t Form) const {
304 AP->EmitLabelReference(Label, SizeOf(AP, Form), Form == dwarf::DW_FORM_strp
305 || Form == dwarf::DW_FORM_sec_offset || Form == dwarf::DW_OP_call_ref
306 || Form == dwarf::DW_FORM_ref_addr);
309 /// SizeOf - Determine size of label value in bytes.
311 unsigned DIELabel::SizeOf(AsmPrinter *AP, uint16_t Form) const {
312 if (Form == dwarf::DW_FORM_data4) return 4;
313 if (Form == dwarf::DW_FORM_sec_offset) return 4;
314 if (Form == dwarf::DW_FORM_strp) return 4;
315 return AP->getDataLayout().getPointerSize();
319 void DIELabel::print(raw_ostream &O) const {
320 O << "Lbl: " << Label->getName();
324 //===----------------------------------------------------------------------===//
325 // DIEDelta Implementation
326 //===----------------------------------------------------------------------===//
328 /// EmitValue - Emit delta value.
330 void DIEDelta::EmitValue(AsmPrinter *AP, uint16_t Form) const {
331 AP->EmitLabelDifference(LabelHi, LabelLo, SizeOf(AP, Form));
334 /// SizeOf - Determine size of delta value in bytes.
336 unsigned DIEDelta::SizeOf(AsmPrinter *AP, uint16_t Form) const {
337 if (Form == dwarf::DW_FORM_data4) return 4;
338 if (Form == dwarf::DW_FORM_strp) return 4;
339 return AP->getDataLayout().getPointerSize();
343 void DIEDelta::print(raw_ostream &O) const {
344 O << "Del: " << LabelHi->getName() << "-" << LabelLo->getName();
348 //===----------------------------------------------------------------------===//
349 // DIEString Implementation
350 //===----------------------------------------------------------------------===//
352 /// EmitValue - Emit string value.
354 void DIEString::EmitValue(AsmPrinter *AP, uint16_t Form) const {
355 Access->EmitValue(AP, Form);
358 /// SizeOf - Determine size of delta value in bytes.
360 unsigned DIEString::SizeOf(AsmPrinter *AP, uint16_t Form) const {
361 return Access->SizeOf(AP, Form);
365 void DIEString::print(raw_ostream &O) const {
366 O << "String: " << Str << "\tSymbol: ";
371 //===----------------------------------------------------------------------===//
372 // DIEEntry Implementation
373 //===----------------------------------------------------------------------===//
375 /// EmitValue - Emit debug information entry offset.
377 void DIEEntry::EmitValue(AsmPrinter *AP, uint16_t Form) const {
378 AP->EmitInt32(Entry->getOffset());
381 unsigned DIEEntry::getRefAddrSize(AsmPrinter *AP) {
382 // DWARF4: References that use the attribute form DW_FORM_ref_addr are
383 // specified to be four bytes in the DWARF 32-bit format and eight bytes
384 // in the DWARF 64-bit format, while DWARF Version 2 specifies that such
385 // references have the same size as an address on the target system.
386 if (AP->getDwarfDebug()->getDwarfVersion() == 2)
387 return AP->getDataLayout().getPointerSize();
388 return sizeof(int32_t);
392 void DIEEntry::print(raw_ostream &O) const {
393 O << format("Die: 0x%lx", (long)(intptr_t)Entry);
397 //===----------------------------------------------------------------------===//
398 // DIEBlock Implementation
399 //===----------------------------------------------------------------------===//
401 /// ComputeSize - calculate the size of the block.
403 unsigned DIEBlock::ComputeSize(AsmPrinter *AP) {
405 const SmallVectorImpl<DIEAbbrevData> &AbbrevData = Abbrev.getData();
406 for (unsigned i = 0, N = Values.size(); i < N; ++i)
407 Size += Values[i]->SizeOf(AP, AbbrevData[i].getForm());
413 /// EmitValue - Emit block data.
415 void DIEBlock::EmitValue(AsmPrinter *Asm, uint16_t Form) const {
417 default: llvm_unreachable("Improper form for block");
418 case dwarf::DW_FORM_block1: Asm->EmitInt8(Size); break;
419 case dwarf::DW_FORM_block2: Asm->EmitInt16(Size); break;
420 case dwarf::DW_FORM_block4: Asm->EmitInt32(Size); break;
421 case dwarf::DW_FORM_block: Asm->EmitULEB128(Size); break;
424 const SmallVectorImpl<DIEAbbrevData> &AbbrevData = Abbrev.getData();
425 for (unsigned i = 0, N = Values.size(); i < N; ++i)
426 Values[i]->EmitValue(Asm, AbbrevData[i].getForm());
429 /// SizeOf - Determine size of block data in bytes.
431 unsigned DIEBlock::SizeOf(AsmPrinter *AP, uint16_t Form) const {
433 case dwarf::DW_FORM_block1: return Size + sizeof(int8_t);
434 case dwarf::DW_FORM_block2: return Size + sizeof(int16_t);
435 case dwarf::DW_FORM_block4: return Size + sizeof(int32_t);
436 case dwarf::DW_FORM_block: return Size + MCAsmInfo::getULEB128Size(Size);
437 default: llvm_unreachable("Improper form for block");
442 void DIEBlock::print(raw_ostream &O) const {