Cosmetic changes, which were long overdue, in DwarfDebug.cpp.
[oota-llvm.git] / lib / CodeGen / AsmPrinter / DIE.cpp
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 "DwarfPrinter.h"
16 #include "llvm/CodeGen/AsmPrinter.h"
17 #include "llvm/MC/MCAsmInfo.h"
18 #include "llvm/Target/TargetData.h"
19 #include "llvm/Support/ErrorHandling.h"
20 #include "llvm/Support/Format.h"
21 using namespace llvm;
22
23 //===----------------------------------------------------------------------===//
24 // DIEAbbrevData Implementation
25 //===----------------------------------------------------------------------===//
26
27 /// Profile - Used to gather unique data for the abbreviation folding set.
28 ///
29 void DIEAbbrevData::Profile(FoldingSetNodeID &ID) const {
30   ID.AddInteger(Attribute);
31   ID.AddInteger(Form);
32 }
33
34 //===----------------------------------------------------------------------===//
35 // DIEAbbrev Implementation
36 //===----------------------------------------------------------------------===//
37
38 /// Profile - Used to gather unique data for the abbreviation folding set.
39 ///
40 void DIEAbbrev::Profile(FoldingSetNodeID &ID) const {
41   ID.AddInteger(Tag);
42   ID.AddInteger(ChildrenFlag);
43
44   // For each attribute description.
45   for (unsigned i = 0, N = Data.size(); i < N; ++i)
46     Data[i].Profile(ID);
47 }
48
49 /// Emit - Print the abbreviation using the specified asm printer.
50 ///
51 void DIEAbbrev::Emit(const AsmPrinter *Asm) const {
52   // Emit its Dwarf tag type.
53   Asm->EmitULEB128Bytes(Tag);
54   Asm->EOL(dwarf::TagString(Tag));
55
56   // Emit whether it has children DIEs.
57   Asm->EmitULEB128Bytes(ChildrenFlag);
58   Asm->EOL(dwarf::ChildrenString(ChildrenFlag));
59
60   // For each attribute description.
61   for (unsigned i = 0, N = Data.size(); i < N; ++i) {
62     const DIEAbbrevData &AttrData = Data[i];
63
64     // Emit attribute type.
65     Asm->EmitULEB128Bytes(AttrData.getAttribute());
66     Asm->EOL(dwarf::AttributeString(AttrData.getAttribute()));
67
68     // Emit form type.
69     Asm->EmitULEB128Bytes(AttrData.getForm());
70     Asm->EOL(dwarf::FormEncodingString(AttrData.getForm()));
71   }
72
73   // Mark end of abbreviation.
74   Asm->EmitULEB128Bytes(0); Asm->EOL("EOM(1)");
75   Asm->EmitULEB128Bytes(0); Asm->EOL("EOM(2)");
76 }
77
78 #ifndef NDEBUG
79 void DIEAbbrev::print(raw_ostream &O) {
80   O << "Abbreviation @"
81     << format("0x%lx", (long)(intptr_t)this)
82     << "  "
83     << dwarf::TagString(Tag)
84     << " "
85     << dwarf::ChildrenString(ChildrenFlag)
86     << '\n';
87
88   for (unsigned i = 0, N = Data.size(); i < N; ++i) {
89     O << "  "
90       << dwarf::AttributeString(Data[i].getAttribute())
91       << "  "
92       << dwarf::FormEncodingString(Data[i].getForm())
93       << '\n';
94   }
95 }
96 void DIEAbbrev::dump() { print(errs()); }
97 #endif
98
99 //===----------------------------------------------------------------------===//
100 // DIE Implementation
101 //===----------------------------------------------------------------------===//
102
103 DIE::~DIE() {
104   for (unsigned i = 0, N = Children.size(); i < N; ++i)
105     delete Children[i];
106 }
107
108 /// addSiblingOffset - Add a sibling offset field to the front of the DIE.
109 ///
110 void DIE::addSiblingOffset() {
111   DIEInteger *DI = new DIEInteger(0);
112   Values.insert(Values.begin(), DI);
113   Abbrev.AddFirstAttribute(dwarf::DW_AT_sibling, dwarf::DW_FORM_ref4);
114 }
115
116 #ifndef NDEBUG
117 void DIE::print(raw_ostream &O, unsigned IncIndent) {
118   IndentCount += IncIndent;
119   const std::string Indent(IndentCount, ' ');
120   bool isBlock = Abbrev.getTag() == 0;
121
122   if (!isBlock) {
123     O << Indent
124       << "Die: "
125       << format("0x%lx", (long)(intptr_t)this)
126       << ", Offset: " << Offset
127       << ", Size: " << Size
128       << "\n";
129
130     O << Indent
131       << dwarf::TagString(Abbrev.getTag())
132       << " "
133       << dwarf::ChildrenString(Abbrev.getChildrenFlag());
134   } else {
135     O << "Size: " << Size;
136   }
137   O << "\n";
138
139   const SmallVector<DIEAbbrevData, 8> &Data = Abbrev.getData();
140
141   IndentCount += 2;
142   for (unsigned i = 0, N = Data.size(); i < N; ++i) {
143     O << Indent;
144
145     if (!isBlock)
146       O << dwarf::AttributeString(Data[i].getAttribute());
147     else
148       O << "Blk[" << i << "]";
149
150     O <<  "  "
151       << dwarf::FormEncodingString(Data[i].getForm())
152       << " ";
153     Values[i]->print(O);
154     O << "\n";
155   }
156   IndentCount -= 2;
157
158   for (unsigned j = 0, M = Children.size(); j < M; ++j) {
159     Children[j]->print(O, 4);
160   }
161
162   if (!isBlock) O << "\n";
163   IndentCount -= IncIndent;
164 }
165
166 void DIE::dump() {
167   print(errs());
168 }
169 #endif
170
171
172 #ifndef NDEBUG
173 void DIEValue::dump() {
174   print(errs());
175 }
176 #endif
177
178 //===----------------------------------------------------------------------===//
179 // DIEInteger Implementation
180 //===----------------------------------------------------------------------===//
181
182 /// EmitValue - Emit integer of appropriate size.
183 ///
184 void DIEInteger::EmitValue(Dwarf *D, unsigned Form) const {
185   const AsmPrinter *Asm = D->getAsm();
186   switch (Form) {
187   case dwarf::DW_FORM_flag:  // Fall thru
188   case dwarf::DW_FORM_ref1:  // Fall thru
189   case dwarf::DW_FORM_data1: Asm->EmitInt8(Integer);         break;
190   case dwarf::DW_FORM_ref2:  // Fall thru
191   case dwarf::DW_FORM_data2: Asm->EmitInt16(Integer);        break;
192   case dwarf::DW_FORM_ref4:  // Fall thru
193   case dwarf::DW_FORM_data4: Asm->EmitInt32(Integer);        break;
194   case dwarf::DW_FORM_ref8:  // Fall thru
195   case dwarf::DW_FORM_data8: Asm->EmitInt64(Integer);        break;
196   case dwarf::DW_FORM_udata: Asm->EmitULEB128Bytes(Integer); break;
197   case dwarf::DW_FORM_sdata: Asm->EmitSLEB128Bytes(Integer); break;
198   default: llvm_unreachable("DIE Value form not supported yet");
199   }
200 }
201
202 /// SizeOf - Determine size of integer value in bytes.
203 ///
204 unsigned DIEInteger::SizeOf(const TargetData *TD, 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   default: llvm_unreachable("DIE Value form not supported yet"); break;
218   }
219   return 0;
220 }
221
222 #ifndef NDEBUG
223 void DIEInteger::print(raw_ostream &O) {
224   O << "Int: " << (int64_t)Integer
225     << format("  0x%llx", (unsigned long long)Integer);
226 }
227 #endif
228
229 //===----------------------------------------------------------------------===//
230 // DIEString Implementation
231 //===----------------------------------------------------------------------===//
232
233 /// EmitValue - Emit string value.
234 ///
235 void DIEString::EmitValue(Dwarf *D, unsigned Form) const {
236   D->getAsm()->EmitString(Str);
237 }
238
239 #ifndef NDEBUG
240 void DIEString::print(raw_ostream &O) {
241   O << "Str: \"" << Str << "\"";
242 }
243 #endif
244
245 //===----------------------------------------------------------------------===//
246 // DIEDwarfLabel Implementation
247 //===----------------------------------------------------------------------===//
248
249 /// EmitValue - Emit label value.
250 ///
251 void DIEDwarfLabel::EmitValue(Dwarf *D, unsigned Form) const {
252   bool IsSmall = Form == dwarf::DW_FORM_data4;
253   D->EmitReference(Label, false, IsSmall);
254 }
255
256 /// SizeOf - Determine size of label value in bytes.
257 ///
258 unsigned DIEDwarfLabel::SizeOf(const TargetData *TD, unsigned Form) const {
259   if (Form == dwarf::DW_FORM_data4) return 4;
260   return TD->getPointerSize();
261 }
262
263 #ifndef NDEBUG
264 void DIEDwarfLabel::print(raw_ostream &O) {
265   O << "Lbl: ";
266   Label.print(O);
267 }
268 #endif
269
270 //===----------------------------------------------------------------------===//
271 // DIEObjectLabel Implementation
272 //===----------------------------------------------------------------------===//
273
274 /// EmitValue - Emit label value.
275 ///
276 void DIEObjectLabel::EmitValue(Dwarf *D, unsigned Form) const {
277   bool IsSmall = Form == dwarf::DW_FORM_data4;
278   D->EmitReference(Label, false, IsSmall);
279 }
280
281 /// SizeOf - Determine size of label value in bytes.
282 ///
283 unsigned DIEObjectLabel::SizeOf(const TargetData *TD, unsigned Form) const {
284   if (Form == dwarf::DW_FORM_data4) return 4;
285   return TD->getPointerSize();
286 }
287
288 #ifndef NDEBUG
289 void DIEObjectLabel::print(raw_ostream &O) {
290   O << "Obj: " << Label;
291 }
292 #endif
293
294 //===----------------------------------------------------------------------===//
295 // DIESectionOffset Implementation
296 //===----------------------------------------------------------------------===//
297
298 /// EmitValue - Emit delta value.
299 ///
300 void DIESectionOffset::EmitValue(Dwarf *D, unsigned Form) const {
301   bool IsSmall = Form == dwarf::DW_FORM_data4;
302   D->EmitSectionOffset(Label.getTag(), Section.getTag(),
303                        Label.getNumber(), Section.getNumber(),
304                        IsSmall, IsEH, UseSet);
305 }
306
307 /// SizeOf - Determine size of delta value in bytes.
308 ///
309 unsigned DIESectionOffset::SizeOf(const TargetData *TD, unsigned Form) const {
310   if (Form == dwarf::DW_FORM_data4) return 4;
311   return TD->getPointerSize();
312 }
313
314 #ifndef NDEBUG
315 void DIESectionOffset::print(raw_ostream &O) {
316   O << "Off: ";
317   Label.print(O);
318   O << "-";
319   Section.print(O);
320   O << "-" << IsEH << "-" << UseSet;
321 }
322 #endif
323
324 //===----------------------------------------------------------------------===//
325 // DIEDelta Implementation
326 //===----------------------------------------------------------------------===//
327
328 /// EmitValue - Emit delta value.
329 ///
330 void DIEDelta::EmitValue(Dwarf *D, unsigned Form) const {
331   bool IsSmall = Form == dwarf::DW_FORM_data4;
332   D->EmitDifference(LabelHi, LabelLo, IsSmall);
333 }
334
335 /// SizeOf - Determine size of delta value in bytes.
336 ///
337 unsigned DIEDelta::SizeOf(const TargetData *TD, unsigned Form) const {
338   if (Form == dwarf::DW_FORM_data4) return 4;
339   return TD->getPointerSize();
340 }
341
342 #ifndef NDEBUG
343 void DIEDelta::print(raw_ostream &O) {
344   O << "Del: ";
345   LabelHi.print(O);
346   O << "-";
347   LabelLo.print(O);
348 }
349 #endif
350
351 //===----------------------------------------------------------------------===//
352 // DIEEntry Implementation
353 //===----------------------------------------------------------------------===//
354
355 /// EmitValue - Emit debug information entry offset.
356 ///
357 void DIEEntry::EmitValue(Dwarf *D, unsigned Form) const {
358   D->getAsm()->EmitInt32(Entry->getOffset());
359 }
360
361 #ifndef NDEBUG
362 void DIEEntry::print(raw_ostream &O) {
363   O << format("Die: 0x%lx", (long)(intptr_t)Entry);
364 }
365 #endif
366
367 //===----------------------------------------------------------------------===//
368 // DIEBlock Implementation
369 //===----------------------------------------------------------------------===//
370
371 /// ComputeSize - calculate the size of the block.
372 ///
373 unsigned DIEBlock::ComputeSize(const TargetData *TD) {
374   if (!Size) {
375     const SmallVector<DIEAbbrevData, 8> &AbbrevData = Abbrev.getData();
376     for (unsigned i = 0, N = Values.size(); i < N; ++i)
377       Size += Values[i]->SizeOf(TD, AbbrevData[i].getForm());
378   }
379
380   return Size;
381 }
382
383 /// EmitValue - Emit block data.
384 ///
385 void DIEBlock::EmitValue(Dwarf *D, unsigned Form) const {
386   const AsmPrinter *Asm = D->getAsm();
387   switch (Form) {
388   case dwarf::DW_FORM_block1: Asm->EmitInt8(Size);         break;
389   case dwarf::DW_FORM_block2: Asm->EmitInt16(Size);        break;
390   case dwarf::DW_FORM_block4: Asm->EmitInt32(Size);        break;
391   case dwarf::DW_FORM_block:  Asm->EmitULEB128Bytes(Size); break;
392   default: llvm_unreachable("Improper form for block");         break;
393   }
394
395   const SmallVector<DIEAbbrevData, 8> &AbbrevData = Abbrev.getData();
396   for (unsigned i = 0, N = Values.size(); i < N; ++i) {
397     Asm->EOL();
398     Values[i]->EmitValue(D, AbbrevData[i].getForm());
399   }
400 }
401
402 /// SizeOf - Determine size of block data in bytes.
403 ///
404 unsigned DIEBlock::SizeOf(const TargetData *TD, unsigned Form) const {
405   switch (Form) {
406   case dwarf::DW_FORM_block1: return Size + sizeof(int8_t);
407   case dwarf::DW_FORM_block2: return Size + sizeof(int16_t);
408   case dwarf::DW_FORM_block4: return Size + sizeof(int32_t);
409   case dwarf::DW_FORM_block: return Size + MCAsmInfo::getULEB128Size(Size);
410   default: llvm_unreachable("Improper form for block"); break;
411   }
412   return 0;
413 }
414
415 #ifndef NDEBUG
416 void DIEBlock::print(raw_ostream &O) {
417   O << "Blk: ";
418   DIE::print(O, 5);
419 }
420 #endif