1 //===-- llvm/BinaryFormat/Dwarf.cpp - Dwarf Framework ------------*- C++-*-===//
2 //
3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4 // See https://llvm.org/LICENSE.txt for license information.
5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6 //
7 //===----------------------------------------------------------------------===//
8 //
9 // This file contains support for generic dwarf information.
10 //
11 //===----------------------------------------------------------------------===//
12 
13 #include "llvm/BinaryFormat/Dwarf.h"
14 #include "llvm/ADT/StringSwitch.h"
15 #include "llvm/ADT/Triple.h"
16 #include "llvm/Support/ErrorHandling.h"
17 
18 using namespace llvm;
19 using namespace dwarf;
20 
21 StringRef llvm::dwarf::TagString(unsigned Tag) {
22   switch (Tag) {
23   default:
24     return StringRef();
25 #define HANDLE_DW_TAG(ID, NAME, VERSION, VENDOR, KIND)                         \
26   case DW_TAG_##NAME:                                                          \
27     return "DW_TAG_" #NAME;
28 #include "llvm/BinaryFormat/Dwarf.def"
29   }
30 }
31 
32 unsigned llvm::dwarf::getTag(StringRef TagString) {
33   return StringSwitch<unsigned>(TagString)
34 #define HANDLE_DW_TAG(ID, NAME, VERSION, VENDOR, KIND)                         \
35   .Case("DW_TAG_" #NAME, DW_TAG_##NAME)
36 #include "llvm/BinaryFormat/Dwarf.def"
37       .Default(DW_TAG_invalid);
38 }
39 
40 unsigned llvm::dwarf::TagVersion(dwarf::Tag Tag) {
41   switch (Tag) {
42   default:
43     return 0;
44 #define HANDLE_DW_TAG(ID, NAME, VERSION, VENDOR, KIND)                         \
45   case DW_TAG_##NAME:                                                          \
46     return VERSION;
47 #include "llvm/BinaryFormat/Dwarf.def"
48   }
49 }
50 
51 unsigned llvm::dwarf::TagVendor(dwarf::Tag Tag) {
52   switch (Tag) {
53   default:
54     return 0;
55 #define HANDLE_DW_TAG(ID, NAME, VERSION, VENDOR, KIND)                         \
56   case DW_TAG_##NAME:                                                          \
57     return DWARF_VENDOR_##VENDOR;
58 #include "llvm/BinaryFormat/Dwarf.def"
59   }
60 }
61 
62 StringRef llvm::dwarf::ChildrenString(unsigned Children) {
63   switch (Children) {
64   case DW_CHILDREN_no:
65     return "DW_CHILDREN_no";
66   case DW_CHILDREN_yes:
67     return "DW_CHILDREN_yes";
68   }
69   return StringRef();
70 }
71 
72 StringRef llvm::dwarf::AttributeString(unsigned Attribute) {
73   switch (Attribute) {
74   default:
75     return StringRef();
76 #define HANDLE_DW_AT(ID, NAME, VERSION, VENDOR)                                \
77   case DW_AT_##NAME:                                                           \
78     return "DW_AT_" #NAME;
79 #include "llvm/BinaryFormat/Dwarf.def"
80   }
81 }
82 
83 unsigned llvm::dwarf::AttributeVersion(dwarf::Attribute Attribute) {
84   switch (Attribute) {
85   default:
86     return 0;
87 #define HANDLE_DW_AT(ID, NAME, VERSION, VENDOR)                                \
88   case DW_AT_##NAME:                                                           \
89     return VERSION;
90 #include "llvm/BinaryFormat/Dwarf.def"
91   }
92 }
93 
94 unsigned llvm::dwarf::AttributeVendor(dwarf::Attribute Attribute) {
95   switch (Attribute) {
96   default:
97     return 0;
98 #define HANDLE_DW_AT(ID, NAME, VERSION, VENDOR)                                \
99   case DW_AT_##NAME:                                                           \
100     return DWARF_VENDOR_##VENDOR;
101 #include "llvm/BinaryFormat/Dwarf.def"
102   }
103 }
104 
105 StringRef llvm::dwarf::FormEncodingString(unsigned Encoding) {
106   switch (Encoding) {
107   default:
108     return StringRef();
109 #define HANDLE_DW_FORM(ID, NAME, VERSION, VENDOR)                              \
110   case DW_FORM_##NAME:                                                         \
111     return "DW_FORM_" #NAME;
112 #include "llvm/BinaryFormat/Dwarf.def"
113   }
114 }
115 
116 unsigned llvm::dwarf::FormVersion(dwarf::Form Form) {
117   switch (Form) {
118   default:
119     return 0;
120 #define HANDLE_DW_FORM(ID, NAME, VERSION, VENDOR)                              \
121   case DW_FORM_##NAME:                                                         \
122     return VERSION;
123 #include "llvm/BinaryFormat/Dwarf.def"
124   }
125 }
126 
127 unsigned llvm::dwarf::FormVendor(dwarf::Form Form) {
128   switch (Form) {
129   default:
130     return 0;
131 #define HANDLE_DW_FORM(ID, NAME, VERSION, VENDOR)                              \
132   case DW_FORM_##NAME:                                                         \
133     return DWARF_VENDOR_##VENDOR;
134 #include "llvm/BinaryFormat/Dwarf.def"
135   }
136 }
137 
138 StringRef llvm::dwarf::OperationEncodingString(unsigned Encoding) {
139   switch (Encoding) {
140   default:
141     return StringRef();
142 #define HANDLE_DW_OP(ID, NAME, VERSION, VENDOR)                                \
143   case DW_OP_##NAME:                                                           \
144     return "DW_OP_" #NAME;
145 #include "llvm/BinaryFormat/Dwarf.def"
146   case DW_OP_LLVM_convert:
147     return "DW_OP_LLVM_convert";
148   case DW_OP_LLVM_fragment:
149     return "DW_OP_LLVM_fragment";
150   case DW_OP_LLVM_tag_offset:
151     return "DW_OP_LLVM_tag_offset";
152   case DW_OP_LLVM_entry_value:
153     return "DW_OP_LLVM_entry_value";
154   case DW_OP_LLVM_implicit_pointer:
155     return "DW_OP_LLVM_implicit_pointer";
156   case DW_OP_LLVM_arg:
157     return "DW_OP_LLVM_arg";
158   }
159 }
160 
161 unsigned llvm::dwarf::getOperationEncoding(StringRef OperationEncodingString) {
162   return StringSwitch<unsigned>(OperationEncodingString)
163 #define HANDLE_DW_OP(ID, NAME, VERSION, VENDOR)                                \
164   .Case("DW_OP_" #NAME, DW_OP_##NAME)
165 #include "llvm/BinaryFormat/Dwarf.def"
166       .Case("DW_OP_LLVM_convert", DW_OP_LLVM_convert)
167       .Case("DW_OP_LLVM_fragment", DW_OP_LLVM_fragment)
168       .Case("DW_OP_LLVM_tag_offset", DW_OP_LLVM_tag_offset)
169       .Case("DW_OP_LLVM_entry_value", DW_OP_LLVM_entry_value)
170       .Case("DW_OP_LLVM_implicit_pointer", DW_OP_LLVM_implicit_pointer)
171       .Case("DW_OP_LLVM_arg", DW_OP_LLVM_arg)
172       .Default(0);
173 }
174 
175 unsigned llvm::dwarf::OperationVersion(dwarf::LocationAtom Op) {
176   switch (Op) {
177   default:
178     return 0;
179 #define HANDLE_DW_OP(ID, NAME, VERSION, VENDOR)                                \
180   case DW_OP_##NAME:                                                           \
181     return VERSION;
182 #include "llvm/BinaryFormat/Dwarf.def"
183   }
184 }
185 
186 unsigned llvm::dwarf::OperationVendor(dwarf::LocationAtom Op) {
187   switch (Op) {
188   default:
189     return 0;
190 #define HANDLE_DW_OP(ID, NAME, VERSION, VENDOR)                                \
191   case DW_OP_##NAME:                                                           \
192     return DWARF_VENDOR_##VENDOR;
193 #include "llvm/BinaryFormat/Dwarf.def"
194   }
195 }
196 
197 StringRef llvm::dwarf::AttributeEncodingString(unsigned Encoding) {
198   switch (Encoding) {
199   default:
200     return StringRef();
201 #define HANDLE_DW_ATE(ID, NAME, VERSION, VENDOR)                               \
202   case DW_ATE_##NAME:                                                          \
203     return "DW_ATE_" #NAME;
204 #include "llvm/BinaryFormat/Dwarf.def"
205   }
206 }
207 
208 unsigned llvm::dwarf::getAttributeEncoding(StringRef EncodingString) {
209   return StringSwitch<unsigned>(EncodingString)
210 #define HANDLE_DW_ATE(ID, NAME, VERSION, VENDOR)                               \
211   .Case("DW_ATE_" #NAME, DW_ATE_##NAME)
212 #include "llvm/BinaryFormat/Dwarf.def"
213       .Default(0);
214 }
215 
216 unsigned llvm::dwarf::AttributeEncodingVersion(dwarf::TypeKind ATE) {
217   switch (ATE) {
218   default:
219     return 0;
220 #define HANDLE_DW_ATE(ID, NAME, VERSION, VENDOR)                               \
221   case DW_ATE_##NAME:                                                          \
222     return VERSION;
223 #include "llvm/BinaryFormat/Dwarf.def"
224   }
225 }
226 
227 unsigned llvm::dwarf::AttributeEncodingVendor(dwarf::TypeKind ATE) {
228   switch (ATE) {
229   default:
230     return 0;
231 #define HANDLE_DW_ATE(ID, NAME, VERSION, VENDOR)                               \
232   case DW_ATE_##NAME:                                                          \
233     return DWARF_VENDOR_##VENDOR;
234 #include "llvm/BinaryFormat/Dwarf.def"
235   }
236 }
237 
238 StringRef llvm::dwarf::DecimalSignString(unsigned Sign) {
239   switch (Sign) {
240   case DW_DS_unsigned:
241     return "DW_DS_unsigned";
242   case DW_DS_leading_overpunch:
243     return "DW_DS_leading_overpunch";
244   case DW_DS_trailing_overpunch:
245     return "DW_DS_trailing_overpunch";
246   case DW_DS_leading_separate:
247     return "DW_DS_leading_separate";
248   case DW_DS_trailing_separate:
249     return "DW_DS_trailing_separate";
250   }
251   return StringRef();
252 }
253 
254 StringRef llvm::dwarf::EndianityString(unsigned Endian) {
255   switch (Endian) {
256   case DW_END_default:
257     return "DW_END_default";
258   case DW_END_big:
259     return "DW_END_big";
260   case DW_END_little:
261     return "DW_END_little";
262   case DW_END_lo_user:
263     return "DW_END_lo_user";
264   case DW_END_hi_user:
265     return "DW_END_hi_user";
266   }
267   return StringRef();
268 }
269 
270 StringRef llvm::dwarf::AccessibilityString(unsigned Access) {
271   switch (Access) {
272   // Accessibility codes
273   case DW_ACCESS_public:
274     return "DW_ACCESS_public";
275   case DW_ACCESS_protected:
276     return "DW_ACCESS_protected";
277   case DW_ACCESS_private:
278     return "DW_ACCESS_private";
279   }
280   return StringRef();
281 }
282 
283 StringRef llvm::dwarf::DefaultedMemberString(unsigned DefaultedEncodings) {
284   switch (DefaultedEncodings) {
285   // Defaulted Member Encodings codes
286   case DW_DEFAULTED_no:
287     return "DW_DEFAULTED_no";
288   case DW_DEFAULTED_in_class:
289     return "DW_DEFAULTED_in_class";
290   case DW_DEFAULTED_out_of_class:
291     return "DW_DEFAULTED_out_of_class";
292   }
293   return StringRef();
294 }
295 
296 StringRef llvm::dwarf::VisibilityString(unsigned Visibility) {
297   switch (Visibility) {
298   case DW_VIS_local:
299     return "DW_VIS_local";
300   case DW_VIS_exported:
301     return "DW_VIS_exported";
302   case DW_VIS_qualified:
303     return "DW_VIS_qualified";
304   }
305   return StringRef();
306 }
307 
308 StringRef llvm::dwarf::VirtualityString(unsigned Virtuality) {
309   switch (Virtuality) {
310   default:
311     return StringRef();
312 #define HANDLE_DW_VIRTUALITY(ID, NAME)                                         \
313   case DW_VIRTUALITY_##NAME:                                                   \
314     return "DW_VIRTUALITY_" #NAME;
315 #include "llvm/BinaryFormat/Dwarf.def"
316   }
317 }
318 
319 unsigned llvm::dwarf::getVirtuality(StringRef VirtualityString) {
320   return StringSwitch<unsigned>(VirtualityString)
321 #define HANDLE_DW_VIRTUALITY(ID, NAME)                                         \
322   .Case("DW_VIRTUALITY_" #NAME, DW_VIRTUALITY_##NAME)
323 #include "llvm/BinaryFormat/Dwarf.def"
324       .Default(DW_VIRTUALITY_invalid);
325 }
326 
327 StringRef llvm::dwarf::LanguageString(unsigned Language) {
328   switch (Language) {
329   default:
330     return StringRef();
331 #define HANDLE_DW_LANG(ID, NAME, LOWER_BOUND, VERSION, VENDOR)                 \
332   case DW_LANG_##NAME:                                                         \
333     return "DW_LANG_" #NAME;
334 #include "llvm/BinaryFormat/Dwarf.def"
335   }
336 }
337 
338 unsigned llvm::dwarf::getLanguage(StringRef LanguageString) {
339   return StringSwitch<unsigned>(LanguageString)
340 #define HANDLE_DW_LANG(ID, NAME, LOWER_BOUND, VERSION, VENDOR)                 \
341   .Case("DW_LANG_" #NAME, DW_LANG_##NAME)
342 #include "llvm/BinaryFormat/Dwarf.def"
343       .Default(0);
344 }
345 
346 unsigned llvm::dwarf::LanguageVersion(dwarf::SourceLanguage Lang) {
347   switch (Lang) {
348   default:
349     return 0;
350 #define HANDLE_DW_LANG(ID, NAME, LOWER_BOUND, VERSION, VENDOR)                 \
351   case DW_LANG_##NAME:                                                         \
352     return VERSION;
353 #include "llvm/BinaryFormat/Dwarf.def"
354   }
355 }
356 
357 unsigned llvm::dwarf::LanguageVendor(dwarf::SourceLanguage Lang) {
358   switch (Lang) {
359   default:
360     return 0;
361 #define HANDLE_DW_LANG(ID, NAME, LOWER_BOUND, VERSION, VENDOR)                 \
362   case DW_LANG_##NAME:                                                         \
363     return DWARF_VENDOR_##VENDOR;
364 #include "llvm/BinaryFormat/Dwarf.def"
365   }
366 }
367 
368 std::optional<unsigned>
369 llvm::dwarf::LanguageLowerBound(dwarf::SourceLanguage Lang) {
370   switch (Lang) {
371   default:
372     return std::nullopt;
373 #define HANDLE_DW_LANG(ID, NAME, LOWER_BOUND, VERSION, VENDOR)                 \
374   case DW_LANG_##NAME:                                                         \
375     return LOWER_BOUND;
376 #include "llvm/BinaryFormat/Dwarf.def"
377   }
378 }
379 
380 StringRef llvm::dwarf::CaseString(unsigned Case) {
381   switch (Case) {
382   case DW_ID_case_sensitive:
383     return "DW_ID_case_sensitive";
384   case DW_ID_up_case:
385     return "DW_ID_up_case";
386   case DW_ID_down_case:
387     return "DW_ID_down_case";
388   case DW_ID_case_insensitive:
389     return "DW_ID_case_insensitive";
390   }
391   return StringRef();
392 }
393 
394 StringRef llvm::dwarf::ConventionString(unsigned CC) {
395   switch (CC) {
396   default:
397     return StringRef();
398 #define HANDLE_DW_CC(ID, NAME)                                                 \
399   case DW_CC_##NAME:                                                           \
400     return "DW_CC_" #NAME;
401 #include "llvm/BinaryFormat/Dwarf.def"
402   }
403 }
404 
405 unsigned llvm::dwarf::getCallingConvention(StringRef CCString) {
406   return StringSwitch<unsigned>(CCString)
407 #define HANDLE_DW_CC(ID, NAME) .Case("DW_CC_" #NAME, DW_CC_##NAME)
408 #include "llvm/BinaryFormat/Dwarf.def"
409       .Default(0);
410 }
411 
412 StringRef llvm::dwarf::InlineCodeString(unsigned Code) {
413   switch (Code) {
414   case DW_INL_not_inlined:
415     return "DW_INL_not_inlined";
416   case DW_INL_inlined:
417     return "DW_INL_inlined";
418   case DW_INL_declared_not_inlined:
419     return "DW_INL_declared_not_inlined";
420   case DW_INL_declared_inlined:
421     return "DW_INL_declared_inlined";
422   }
423   return StringRef();
424 }
425 
426 StringRef llvm::dwarf::ArrayOrderString(unsigned Order) {
427   switch (Order) {
428   case DW_ORD_row_major:
429     return "DW_ORD_row_major";
430   case DW_ORD_col_major:
431     return "DW_ORD_col_major";
432   }
433   return StringRef();
434 }
435 
436 StringRef llvm::dwarf::LNStandardString(unsigned Standard) {
437   switch (Standard) {
438   default:
439     return StringRef();
440 #define HANDLE_DW_LNS(ID, NAME)                                                \
441   case DW_LNS_##NAME:                                                          \
442     return "DW_LNS_" #NAME;
443 #include "llvm/BinaryFormat/Dwarf.def"
444   }
445 }
446 
447 StringRef llvm::dwarf::LNExtendedString(unsigned Encoding) {
448   switch (Encoding) {
449   default:
450     return StringRef();
451 #define HANDLE_DW_LNE(ID, NAME)                                                \
452   case DW_LNE_##NAME:                                                          \
453     return "DW_LNE_" #NAME;
454 #include "llvm/BinaryFormat/Dwarf.def"
455   }
456 }
457 
458 StringRef llvm::dwarf::MacinfoString(unsigned Encoding) {
459   switch (Encoding) {
460   // Macinfo Type Encodings
461   case DW_MACINFO_define:
462     return "DW_MACINFO_define";
463   case DW_MACINFO_undef:
464     return "DW_MACINFO_undef";
465   case DW_MACINFO_start_file:
466     return "DW_MACINFO_start_file";
467   case DW_MACINFO_end_file:
468     return "DW_MACINFO_end_file";
469   case DW_MACINFO_vendor_ext:
470     return "DW_MACINFO_vendor_ext";
471   case DW_MACINFO_invalid:
472     return "DW_MACINFO_invalid";
473   }
474   return StringRef();
475 }
476 
477 unsigned llvm::dwarf::getMacinfo(StringRef MacinfoString) {
478   return StringSwitch<unsigned>(MacinfoString)
479       .Case("DW_MACINFO_define", DW_MACINFO_define)
480       .Case("DW_MACINFO_undef", DW_MACINFO_undef)
481       .Case("DW_MACINFO_start_file", DW_MACINFO_start_file)
482       .Case("DW_MACINFO_end_file", DW_MACINFO_end_file)
483       .Case("DW_MACINFO_vendor_ext", DW_MACINFO_vendor_ext)
484       .Default(DW_MACINFO_invalid);
485 }
486 
487 StringRef llvm::dwarf::MacroString(unsigned Encoding) {
488   switch (Encoding) {
489   default:
490     return StringRef();
491 #define HANDLE_DW_MACRO(ID, NAME)                                              \
492   case DW_MACRO_##NAME:                                                        \
493     return "DW_MACRO_" #NAME;
494 #include "llvm/BinaryFormat/Dwarf.def"
495   }
496 }
497 
498 StringRef llvm::dwarf::GnuMacroString(unsigned Encoding) {
499   switch (Encoding) {
500   default:
501     return StringRef();
502 #define HANDLE_DW_MACRO_GNU(ID, NAME)                                          \
503   case DW_MACRO_GNU_##NAME:                                                    \
504     return "DW_MACRO_GNU_" #NAME;
505 #include "llvm/BinaryFormat/Dwarf.def"
506   }
507 }
508 
509 unsigned llvm::dwarf::getMacro(StringRef MacroString) {
510   return StringSwitch<unsigned>(MacroString)
511 #define HANDLE_DW_MACRO(ID, NAME) .Case("DW_MACRO_" #NAME, ID)
512 #include "llvm/BinaryFormat/Dwarf.def"
513       .Default(DW_MACINFO_invalid);
514 }
515 StringRef llvm::dwarf::RangeListEncodingString(unsigned Encoding) {
516   switch (Encoding) {
517   default:
518     return StringRef();
519 #define HANDLE_DW_RLE(ID, NAME)                                                \
520   case DW_RLE_##NAME:                                                          \
521     return "DW_RLE_" #NAME;
522 #include "llvm/BinaryFormat/Dwarf.def"
523   }
524 }
525 
526 StringRef llvm::dwarf::LocListEncodingString(unsigned Encoding) {
527   switch (Encoding) {
528   default:
529     return StringRef();
530 #define HANDLE_DW_LLE(ID, NAME)                                                \
531   case DW_LLE_##NAME:                                                          \
532     return "DW_LLE_" #NAME;
533 #include "llvm/BinaryFormat/Dwarf.def"
534   }
535 }
536 
537 StringRef llvm::dwarf::CallFrameString(unsigned Encoding,
538     Triple::ArchType Arch) {
539   assert(Arch != llvm::Triple::ArchType::UnknownArch);
540 #define SELECT_AARCH64 (Arch == llvm::Triple::aarch64_be || Arch == llvm::Triple::aarch64)
541 #define SELECT_MIPS64 Arch == llvm::Triple::mips64
542 #define SELECT_SPARC (Arch == llvm::Triple::sparc || Arch == llvm::Triple::sparcv9)
543 #define SELECT_X86 (Arch == llvm::Triple::x86 || Arch == llvm::Triple::x86_64)
544 #define HANDLE_DW_CFA(ID, NAME)
545 #define HANDLE_DW_CFA_PRED(ID, NAME, PRED) \
546   if (ID == Encoding && PRED) \
547     return "DW_CFA_" #NAME;
548 #include "llvm/BinaryFormat/Dwarf.def"
549 
550   switch (Encoding) {
551   default:
552     return StringRef();
553 #define HANDLE_DW_CFA_PRED(ID, NAME, PRED)
554 #define HANDLE_DW_CFA(ID, NAME)                                                \
555   case DW_CFA_##NAME:                                                          \
556     return "DW_CFA_" #NAME;
557 #include "llvm/BinaryFormat/Dwarf.def"
558 
559 #undef SELECT_X86
560 #undef SELECT_SPARC
561 #undef SELECT_MIPS64
562 #undef SELECT_AARCH64
563   }
564 }
565 
566 StringRef llvm::dwarf::ApplePropertyString(unsigned Prop) {
567   switch (Prop) {
568   default:
569     return StringRef();
570 #define HANDLE_DW_APPLE_PROPERTY(ID, NAME)                                     \
571   case DW_APPLE_PROPERTY_##NAME:                                               \
572     return "DW_APPLE_PROPERTY_" #NAME;
573 #include "llvm/BinaryFormat/Dwarf.def"
574   }
575 }
576 
577 StringRef llvm::dwarf::UnitTypeString(unsigned UT) {
578   switch (UT) {
579   default:
580     return StringRef();
581 #define HANDLE_DW_UT(ID, NAME)                                                 \
582   case DW_UT_##NAME:                                                           \
583     return "DW_UT_" #NAME;
584 #include "llvm/BinaryFormat/Dwarf.def"
585   }
586 }
587 
588 StringRef llvm::dwarf::AtomTypeString(unsigned AT) {
589   switch (AT) {
590   case dwarf::DW_ATOM_null:
591     return "DW_ATOM_null";
592   case dwarf::DW_ATOM_die_offset:
593     return "DW_ATOM_die_offset";
594   case DW_ATOM_cu_offset:
595     return "DW_ATOM_cu_offset";
596   case DW_ATOM_die_tag:
597     return "DW_ATOM_die_tag";
598   case DW_ATOM_type_flags:
599   case DW_ATOM_type_type_flags:
600     return "DW_ATOM_type_flags";
601   case DW_ATOM_qual_name_hash:
602     return "DW_ATOM_qual_name_hash";
603   }
604   return StringRef();
605 }
606 
607 StringRef llvm::dwarf::GDBIndexEntryKindString(GDBIndexEntryKind Kind) {
608   switch (Kind) {
609   case GIEK_NONE:
610     return "NONE";
611   case GIEK_TYPE:
612     return "TYPE";
613   case GIEK_VARIABLE:
614     return "VARIABLE";
615   case GIEK_FUNCTION:
616     return "FUNCTION";
617   case GIEK_OTHER:
618     return "OTHER";
619   case GIEK_UNUSED5:
620     return "UNUSED5";
621   case GIEK_UNUSED6:
622     return "UNUSED6";
623   case GIEK_UNUSED7:
624     return "UNUSED7";
625   }
626   llvm_unreachable("Unknown GDBIndexEntryKind value");
627 }
628 
629 StringRef
630 llvm::dwarf::GDBIndexEntryLinkageString(GDBIndexEntryLinkage Linkage) {
631   switch (Linkage) {
632   case GIEL_EXTERNAL:
633     return "EXTERNAL";
634   case GIEL_STATIC:
635     return "STATIC";
636   }
637   llvm_unreachable("Unknown GDBIndexEntryLinkage value");
638 }
639 
640 StringRef llvm::dwarf::AttributeValueString(uint16_t Attr, unsigned Val) {
641   switch (Attr) {
642   case DW_AT_accessibility:
643     return AccessibilityString(Val);
644   case DW_AT_virtuality:
645     return VirtualityString(Val);
646   case DW_AT_language:
647     return LanguageString(Val);
648   case DW_AT_encoding:
649     return AttributeEncodingString(Val);
650   case DW_AT_decimal_sign:
651     return DecimalSignString(Val);
652   case DW_AT_endianity:
653     return EndianityString(Val);
654   case DW_AT_visibility:
655     return VisibilityString(Val);
656   case DW_AT_identifier_case:
657     return CaseString(Val);
658   case DW_AT_calling_convention:
659     return ConventionString(Val);
660   case DW_AT_inline:
661     return InlineCodeString(Val);
662   case DW_AT_ordering:
663     return ArrayOrderString(Val);
664   case DW_AT_APPLE_runtime_class:
665     return LanguageString(Val);
666   case DW_AT_defaulted:
667     return DefaultedMemberString(Val);
668   }
669 
670   return StringRef();
671 }
672 
673 StringRef llvm::dwarf::AtomValueString(uint16_t Atom, unsigned Val) {
674   switch (Atom) {
675   case DW_ATOM_null:
676     return "NULL";
677   case DW_ATOM_die_tag:
678     return TagString(Val);
679   }
680 
681   return StringRef();
682 }
683 
684 StringRef llvm::dwarf::IndexString(unsigned Idx) {
685   switch (Idx) {
686   default:
687     return StringRef();
688 #define HANDLE_DW_IDX(ID, NAME)                                                \
689   case DW_IDX_##NAME:                                                          \
690     return "DW_IDX_" #NAME;
691 #include "llvm/BinaryFormat/Dwarf.def"
692   }
693 }
694 
695 std::optional<uint8_t> llvm::dwarf::getFixedFormByteSize(dwarf::Form Form,
696                                                          FormParams Params) {
697   switch (Form) {
698   case DW_FORM_addr:
699     if (Params)
700       return Params.AddrSize;
701     return std::nullopt;
702 
703   case DW_FORM_block:          // ULEB128 length L followed by L bytes.
704   case DW_FORM_block1:         // 1 byte length L followed by L bytes.
705   case DW_FORM_block2:         // 2 byte length L followed by L bytes.
706   case DW_FORM_block4:         // 4 byte length L followed by L bytes.
707   case DW_FORM_string:         // C-string with null terminator.
708   case DW_FORM_sdata:          // SLEB128.
709   case DW_FORM_udata:          // ULEB128.
710   case DW_FORM_ref_udata:      // ULEB128.
711   case DW_FORM_indirect:       // ULEB128.
712   case DW_FORM_exprloc:        // ULEB128 length L followed by L bytes.
713   case DW_FORM_strx:           // ULEB128.
714   case DW_FORM_addrx:          // ULEB128.
715   case DW_FORM_loclistx:       // ULEB128.
716   case DW_FORM_rnglistx:       // ULEB128.
717   case DW_FORM_GNU_addr_index: // ULEB128.
718   case DW_FORM_GNU_str_index:  // ULEB128.
719     return std::nullopt;
720 
721   case DW_FORM_ref_addr:
722     if (Params)
723       return Params.getRefAddrByteSize();
724     return std::nullopt;
725 
726   case DW_FORM_flag:
727   case DW_FORM_data1:
728   case DW_FORM_ref1:
729   case DW_FORM_strx1:
730   case DW_FORM_addrx1:
731     return 1;
732 
733   case DW_FORM_data2:
734   case DW_FORM_ref2:
735   case DW_FORM_strx2:
736   case DW_FORM_addrx2:
737     return 2;
738 
739   case DW_FORM_strx3:
740     return 3;
741 
742   case DW_FORM_data4:
743   case DW_FORM_ref4:
744   case DW_FORM_ref_sup4:
745   case DW_FORM_strx4:
746   case DW_FORM_addrx4:
747     return 4;
748 
749   case DW_FORM_strp:
750   case DW_FORM_GNU_ref_alt:
751   case DW_FORM_GNU_strp_alt:
752   case DW_FORM_line_strp:
753   case DW_FORM_sec_offset:
754   case DW_FORM_strp_sup:
755     if (Params)
756       return Params.getDwarfOffsetByteSize();
757     return std::nullopt;
758 
759   case DW_FORM_data8:
760   case DW_FORM_ref8:
761   case DW_FORM_ref_sig8:
762   case DW_FORM_ref_sup8:
763     return 8;
764 
765   case DW_FORM_flag_present:
766     return 0;
767 
768   case DW_FORM_data16:
769     return 16;
770 
771   case DW_FORM_implicit_const:
772     // The implicit value is stored in the abbreviation as a SLEB128, and
773     // there no data in debug info.
774     return 0;
775 
776   default:
777     break;
778   }
779   return std::nullopt;
780 }
781 
782 bool llvm::dwarf::isValidFormForVersion(Form F, unsigned Version,
783                                         bool ExtensionsOk) {
784   if (FormVendor(F) == DWARF_VENDOR_DWARF) {
785     unsigned FV = FormVersion(F);
786     return FV > 0 && FV <= Version;
787   }
788   return ExtensionsOk;
789 }
790 
791 StringRef llvm::dwarf::FormatString(DwarfFormat Format) {
792   switch (Format) {
793   case DWARF32:
794     return "DWARF32";
795   case DWARF64:
796     return "DWARF64";
797   }
798   return StringRef();
799 }
800 
801 StringRef llvm::dwarf::FormatString(bool IsDWARF64) {
802   return FormatString(IsDWARF64 ? DWARF64 : DWARF32);
803 }
804 
805 StringRef llvm::dwarf::RLEString(unsigned RLE) {
806   switch (RLE) {
807   default:
808     return StringRef();
809 #define HANDLE_DW_RLE(ID, NAME)                                                \
810   case DW_RLE_##NAME:                                                          \
811     return "DW_RLE_" #NAME;
812 #include "llvm/BinaryFormat/Dwarf.def"
813   }
814 }
815 
816 constexpr char llvm::dwarf::EnumTraits<Attribute>::Type[];
817 constexpr char llvm::dwarf::EnumTraits<Form>::Type[];
818 constexpr char llvm::dwarf::EnumTraits<Index>::Type[];
819 constexpr char llvm::dwarf::EnumTraits<Tag>::Type[];
820 constexpr char llvm::dwarf::EnumTraits<LineNumberOps>::Type[];
821 constexpr char llvm::dwarf::EnumTraits<LocationAtom>::Type[];
822