1 //===-- ObjCLanguage.cpp ----------------------------------------*- 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 #include <mutex>
10 
11 #include "ObjCLanguage.h"
12 
13 #include "lldb/Core/PluginManager.h"
14 #include "lldb/Core/ValueObject.h"
15 #include "lldb/DataFormatters/DataVisualization.h"
16 #include "lldb/DataFormatters/FormattersHelpers.h"
17 #include "lldb/Symbol/ClangASTContext.h"
18 #include "lldb/Symbol/CompilerType.h"
19 #include "lldb/Target/ObjCLanguageRuntime.h"
20 #include "lldb/Target/Target.h"
21 #include "lldb/Utility/ConstString.h"
22 #include "lldb/Utility/StreamString.h"
23 
24 #include "llvm/Support/Threading.h"
25 
26 #include "CF.h"
27 #include "Cocoa.h"
28 #include "CoreMedia.h"
29 #include "NSDictionary.h"
30 #include "NSSet.h"
31 #include "NSString.h"
32 
33 using namespace lldb;
34 using namespace lldb_private;
35 using namespace lldb_private::formatters;
36 
37 void ObjCLanguage::Initialize() {
38   PluginManager::RegisterPlugin(GetPluginNameStatic(), "Objective-C Language",
39                                 CreateInstance);
40 }
41 
42 void ObjCLanguage::Terminate() {
43   PluginManager::UnregisterPlugin(CreateInstance);
44 }
45 
46 lldb_private::ConstString ObjCLanguage::GetPluginNameStatic() {
47   static ConstString g_name("objc");
48   return g_name;
49 }
50 
51 //------------------------------------------------------------------
52 // PluginInterface protocol
53 //------------------------------------------------------------------
54 
55 lldb_private::ConstString ObjCLanguage::GetPluginName() {
56   return GetPluginNameStatic();
57 }
58 
59 uint32_t ObjCLanguage::GetPluginVersion() { return 1; }
60 
61 //------------------------------------------------------------------
62 // Static Functions
63 //------------------------------------------------------------------
64 
65 Language *ObjCLanguage::CreateInstance(lldb::LanguageType language) {
66   switch (language) {
67   case lldb::eLanguageTypeObjC:
68     return new ObjCLanguage();
69   default:
70     return nullptr;
71   }
72 }
73 
74 void ObjCLanguage::MethodName::Clear() {
75   m_full.Clear();
76   m_class.Clear();
77   m_category.Clear();
78   m_selector.Clear();
79   m_type = eTypeUnspecified;
80   m_category_is_valid = false;
81 }
82 
83 bool ObjCLanguage::MethodName::SetName(llvm::StringRef name, bool strict) {
84   Clear();
85   if (name.empty())
86     return IsValid(strict);
87 
88   // If "strict" is true. then the method must be specified with a '+' or '-'
89   // at the beginning. If "strict" is false, then the '+' or '-' can be omitted
90   bool valid_prefix = false;
91 
92   if (name.size() > 1 && (name[0] == '+' || name[0] == '-')) {
93     valid_prefix = name[1] == '[';
94     if (name[0] == '+')
95       m_type = eTypeClassMethod;
96     else
97       m_type = eTypeInstanceMethod;
98   } else if (!strict) {
99     // "strict" is false, the name just needs to start with '['
100     valid_prefix = name[0] == '[';
101   }
102 
103   if (valid_prefix) {
104     int name_len = name.size();
105     // Objective-C methods must have at least:
106     //      "-[" or "+[" prefix
107     //      One character for a class name
108     //      One character for the space between the class name
109     //      One character for the method name
110     //      "]" suffix
111     if (name_len >= (5 + (strict ? 1 : 0)) && name.back() == ']') {
112       m_full.SetString(name);
113     }
114   }
115   return IsValid(strict);
116 }
117 
118 bool ObjCLanguage::MethodName::SetName(const char *name, bool strict) {
119   return SetName(llvm::StringRef(name), strict);
120 }
121 
122 ConstString ObjCLanguage::MethodName::GetClassName() {
123   if (!m_class) {
124     if (IsValid(false)) {
125       const char *full = m_full.GetCString();
126       const char *class_start = (full[0] == '[' ? full + 1 : full + 2);
127       const char *paren_pos = strchr(class_start, '(');
128       if (paren_pos) {
129         m_class.SetCStringWithLength(class_start, paren_pos - class_start);
130       } else {
131         // No '(' was found in the full name, we can definitively say that our
132         // category was valid (and empty).
133         m_category_is_valid = true;
134         const char *space_pos = strchr(full, ' ');
135         if (space_pos) {
136           m_class.SetCStringWithLength(class_start, space_pos - class_start);
137           if (!m_class_category) {
138             // No category in name, so we can also fill in the m_class_category
139             m_class_category = m_class;
140           }
141         }
142       }
143     }
144   }
145   return m_class;
146 }
147 
148 ConstString ObjCLanguage::MethodName::GetClassNameWithCategory() {
149   if (!m_class_category) {
150     if (IsValid(false)) {
151       const char *full = m_full.GetCString();
152       const char *class_start = (full[0] == '[' ? full + 1 : full + 2);
153       const char *space_pos = strchr(full, ' ');
154       if (space_pos) {
155         m_class_category.SetCStringWithLength(class_start,
156                                               space_pos - class_start);
157         // If m_class hasn't been filled in and the class with category doesn't
158         // contain a '(', then we can also fill in the m_class
159         if (!m_class && strchr(m_class_category.GetCString(), '(') == nullptr) {
160           m_class = m_class_category;
161           // No '(' was found in the full name, we can definitively say that
162           // our category was valid (and empty).
163           m_category_is_valid = true;
164         }
165       }
166     }
167   }
168   return m_class_category;
169 }
170 
171 ConstString ObjCLanguage::MethodName::GetSelector() {
172   if (!m_selector) {
173     if (IsValid(false)) {
174       const char *full = m_full.GetCString();
175       const char *space_pos = strchr(full, ' ');
176       if (space_pos) {
177         ++space_pos; // skip the space
178         m_selector.SetCStringWithLength(space_pos, m_full.GetLength() -
179                                                        (space_pos - full) - 1);
180       }
181     }
182   }
183   return m_selector;
184 }
185 
186 ConstString ObjCLanguage::MethodName::GetCategory() {
187   if (!m_category_is_valid && !m_category) {
188     if (IsValid(false)) {
189       m_category_is_valid = true;
190       const char *full = m_full.GetCString();
191       const char *class_start = (full[0] == '[' ? full + 1 : full + 2);
192       const char *open_paren_pos = strchr(class_start, '(');
193       if (open_paren_pos) {
194         ++open_paren_pos; // Skip the open paren
195         const char *close_paren_pos = strchr(open_paren_pos, ')');
196         if (close_paren_pos)
197           m_category.SetCStringWithLength(open_paren_pos,
198                                           close_paren_pos - open_paren_pos);
199       }
200     }
201   }
202   return m_category;
203 }
204 
205 ConstString ObjCLanguage::MethodName::GetFullNameWithoutCategory(
206     bool empty_if_no_category) {
207   if (IsValid(false)) {
208     if (HasCategory()) {
209       StreamString strm;
210       if (m_type == eTypeClassMethod)
211         strm.PutChar('+');
212       else if (m_type == eTypeInstanceMethod)
213         strm.PutChar('-');
214       strm.Printf("[%s %s]", GetClassName().GetCString(),
215                   GetSelector().GetCString());
216       return ConstString(strm.GetString());
217     }
218 
219     if (!empty_if_no_category) {
220       // Just return the full name since it doesn't have a category
221       return GetFullName();
222     }
223   }
224   return ConstString();
225 }
226 
227 size_t ObjCLanguage::MethodName::GetFullNames(std::vector<ConstString> &names,
228                                               bool append) {
229   if (!append)
230     names.clear();
231   if (IsValid(false)) {
232     StreamString strm;
233     const bool is_class_method = m_type == eTypeClassMethod;
234     const bool is_instance_method = m_type == eTypeInstanceMethod;
235     ConstString category = GetCategory();
236     if (is_class_method || is_instance_method) {
237       names.push_back(m_full);
238       if (category) {
239         strm.Printf("%c[%s %s]", is_class_method ? '+' : '-',
240                     GetClassName().GetCString(), GetSelector().GetCString());
241         names.emplace_back(strm.GetString());
242       }
243     } else {
244       ConstString class_name = GetClassName();
245       ConstString selector = GetSelector();
246       strm.Printf("+[%s %s]", class_name.GetCString(), selector.GetCString());
247       names.emplace_back(strm.GetString());
248       strm.Clear();
249       strm.Printf("-[%s %s]", class_name.GetCString(), selector.GetCString());
250       names.emplace_back(strm.GetString());
251       strm.Clear();
252       if (category) {
253         strm.Printf("+[%s(%s) %s]", class_name.GetCString(),
254                     category.GetCString(), selector.GetCString());
255         names.emplace_back(strm.GetString());
256         strm.Clear();
257         strm.Printf("-[%s(%s) %s]", class_name.GetCString(),
258                     category.GetCString(), selector.GetCString());
259         names.emplace_back(strm.GetString());
260       }
261     }
262   }
263   return names.size();
264 }
265 
266 static void LoadObjCFormatters(TypeCategoryImplSP objc_category_sp) {
267   if (!objc_category_sp)
268     return;
269 
270   TypeSummaryImpl::Flags objc_flags;
271   objc_flags.SetCascades(false)
272       .SetSkipPointers(true)
273       .SetSkipReferences(true)
274       .SetDontShowChildren(true)
275       .SetDontShowValue(true)
276       .SetShowMembersOneLiner(false)
277       .SetHideItemNames(false);
278 
279   lldb::TypeSummaryImplSP ObjC_BOOL_summary(new CXXFunctionSummaryFormat(
280       objc_flags, lldb_private::formatters::ObjCBOOLSummaryProvider, ""));
281   objc_category_sp->GetTypeSummariesContainer()->Add(ConstString("BOOL"),
282                                                      ObjC_BOOL_summary);
283   objc_category_sp->GetTypeSummariesContainer()->Add(ConstString("BOOL &"),
284                                                      ObjC_BOOL_summary);
285   objc_category_sp->GetTypeSummariesContainer()->Add(ConstString("BOOL *"),
286                                                      ObjC_BOOL_summary);
287 
288   // we need to skip pointers here since we are special casing a SEL* when
289   // retrieving its value
290   objc_flags.SetSkipPointers(true);
291   AddCXXSummary(objc_category_sp,
292                 lldb_private::formatters::ObjCSELSummaryProvider<false>,
293                 "SEL summary provider", ConstString("SEL"), objc_flags);
294   AddCXXSummary(
295       objc_category_sp, lldb_private::formatters::ObjCSELSummaryProvider<false>,
296       "SEL summary provider", ConstString("struct objc_selector"), objc_flags);
297   AddCXXSummary(
298       objc_category_sp, lldb_private::formatters::ObjCSELSummaryProvider<false>,
299       "SEL summary provider", ConstString("objc_selector"), objc_flags);
300   AddCXXSummary(
301       objc_category_sp, lldb_private::formatters::ObjCSELSummaryProvider<true>,
302       "SEL summary provider", ConstString("objc_selector *"), objc_flags);
303   AddCXXSummary(objc_category_sp,
304                 lldb_private::formatters::ObjCSELSummaryProvider<true>,
305                 "SEL summary provider", ConstString("SEL *"), objc_flags);
306 
307   AddCXXSummary(objc_category_sp,
308                 lldb_private::formatters::ObjCClassSummaryProvider,
309                 "Class summary provider", ConstString("Class"), objc_flags);
310 
311   SyntheticChildren::Flags class_synth_flags;
312   class_synth_flags.SetCascades(true).SetSkipPointers(false).SetSkipReferences(
313       false);
314 
315   AddCXXSynthetic(objc_category_sp,
316                   lldb_private::formatters::ObjCClassSyntheticFrontEndCreator,
317                   "Class synthetic children", ConstString("Class"),
318                   class_synth_flags);
319 
320   objc_flags.SetSkipPointers(false);
321   objc_flags.SetCascades(true);
322   objc_flags.SetSkipReferences(false);
323 
324   AddStringSummary(objc_category_sp, "${var.__FuncPtr%A}",
325                    ConstString("__block_literal_generic"), objc_flags);
326 
327   AddStringSummary(objc_category_sp, "${var.years} years, ${var.months} "
328                                      "months, ${var.days} days, ${var.hours} "
329                                      "hours, ${var.minutes} minutes "
330                                      "${var.seconds} seconds",
331                    ConstString("CFGregorianUnits"), objc_flags);
332   AddStringSummary(objc_category_sp,
333                    "location=${var.location} length=${var.length}",
334                    ConstString("CFRange"), objc_flags);
335 
336   AddStringSummary(objc_category_sp,
337                    "location=${var.location}, length=${var.length}",
338                    ConstString("NSRange"), objc_flags);
339   AddStringSummary(objc_category_sp, "(${var.origin}, ${var.size}), ...",
340                    ConstString("NSRectArray"), objc_flags);
341 
342   AddOneLineSummary(objc_category_sp, ConstString("NSPoint"), objc_flags);
343   AddOneLineSummary(objc_category_sp, ConstString("NSSize"), objc_flags);
344   AddOneLineSummary(objc_category_sp, ConstString("NSRect"), objc_flags);
345 
346   AddOneLineSummary(objc_category_sp, ConstString("CGSize"), objc_flags);
347   AddOneLineSummary(objc_category_sp, ConstString("CGPoint"), objc_flags);
348   AddOneLineSummary(objc_category_sp, ConstString("CGRect"), objc_flags);
349 
350   AddStringSummary(objc_category_sp,
351                    "red=${var.red} green=${var.green} blue=${var.blue}",
352                    ConstString("RGBColor"), objc_flags);
353   AddStringSummary(
354       objc_category_sp,
355       "(t=${var.top}, l=${var.left}, b=${var.bottom}, r=${var.right})",
356       ConstString("Rect"), objc_flags);
357   AddStringSummary(objc_category_sp, "{(v=${var.v}, h=${var.h})}",
358                    ConstString("Point"), objc_flags);
359   AddStringSummary(objc_category_sp,
360                    "${var.month}/${var.day}/${var.year}  ${var.hour} "
361                    ":${var.minute} :${var.second} dayOfWeek:${var.dayOfWeek}",
362                    ConstString("DateTimeRect *"), objc_flags);
363   AddStringSummary(objc_category_sp, "${var.ld.month}/${var.ld.day}/"
364                                      "${var.ld.year} ${var.ld.hour} "
365                                      ":${var.ld.minute} :${var.ld.second} "
366                                      "dayOfWeek:${var.ld.dayOfWeek}",
367                    ConstString("LongDateRect"), objc_flags);
368   AddStringSummary(objc_category_sp, "(x=${var.x}, y=${var.y})",
369                    ConstString("HIPoint"), objc_flags);
370   AddStringSummary(objc_category_sp, "origin=${var.origin} size=${var.size}",
371                    ConstString("HIRect"), objc_flags);
372 
373   TypeSummaryImpl::Flags appkit_flags;
374   appkit_flags.SetCascades(true)
375       .SetSkipPointers(false)
376       .SetSkipReferences(false)
377       .SetDontShowChildren(true)
378       .SetDontShowValue(false)
379       .SetShowMembersOneLiner(false)
380       .SetHideItemNames(false);
381 
382   appkit_flags.SetDontShowChildren(false);
383 
384   AddCXXSummary(
385       objc_category_sp, lldb_private::formatters::NSArraySummaryProvider,
386       "NSArray summary provider", ConstString("NSArray"), appkit_flags);
387   AddCXXSummary(
388       objc_category_sp, lldb_private::formatters::NSArraySummaryProvider,
389       "NSArray summary provider", ConstString("NSMutableArray"), appkit_flags);
390   AddCXXSummary(
391       objc_category_sp, lldb_private::formatters::NSArraySummaryProvider,
392       "NSArray summary provider", ConstString("__NSArrayI"), appkit_flags);
393   AddCXXSummary(
394       objc_category_sp, lldb_private::formatters::NSArraySummaryProvider,
395       "NSArray summary provider", ConstString("__NSArray0"), appkit_flags);
396   AddCXXSummary(objc_category_sp,
397                 lldb_private::formatters::NSArraySummaryProvider,
398                 "NSArray summary provider",
399                 ConstString("__NSSingleObjectArrayI"), appkit_flags);
400   AddCXXSummary(
401       objc_category_sp, lldb_private::formatters::NSArraySummaryProvider,
402       "NSArray summary provider", ConstString("__NSArrayM"), appkit_flags);
403   AddCXXSummary(
404       objc_category_sp, lldb_private::formatters::NSArraySummaryProvider,
405       "NSArray summary provider", ConstString("__NSCFArray"), appkit_flags);
406   AddCXXSummary(
407       objc_category_sp, lldb_private::formatters::NSArraySummaryProvider,
408       "NSArray summary provider", ConstString("_NSCallStackArray"), appkit_flags);
409   AddCXXSummary(
410       objc_category_sp, lldb_private::formatters::NSArraySummaryProvider,
411       "NSArray summary provider", ConstString("CFArrayRef"), appkit_flags);
412   AddCXXSummary(objc_category_sp,
413                 lldb_private::formatters::NSArraySummaryProvider,
414                 "NSArray summary provider", ConstString("CFMutableArrayRef"),
415                 appkit_flags);
416 
417   AddCXXSummary(objc_category_sp,
418                 lldb_private::formatters::NSDictionarySummaryProvider<false>,
419                 "NSDictionary summary provider", ConstString("NSDictionary"),
420                 appkit_flags);
421   AddCXXSummary(objc_category_sp,
422                 lldb_private::formatters::NSDictionarySummaryProvider<false>,
423                 "NSDictionary summary provider",
424                 ConstString("NSMutableDictionary"), appkit_flags);
425   AddCXXSummary(objc_category_sp,
426                 lldb_private::formatters::NSDictionarySummaryProvider<false>,
427                 "NSDictionary summary provider",
428                 ConstString("__NSCFDictionary"), appkit_flags);
429   AddCXXSummary(objc_category_sp,
430                 lldb_private::formatters::NSDictionarySummaryProvider<false>,
431                 "NSDictionary summary provider", ConstString("__NSDictionaryI"),
432                 appkit_flags);
433   AddCXXSummary(objc_category_sp,
434                 lldb_private::formatters::NSDictionarySummaryProvider<false>,
435                 "NSDictionary summary provider",
436                 ConstString("__NSSingleEntryDictionaryI"), appkit_flags);
437   AddCXXSummary(objc_category_sp,
438                 lldb_private::formatters::NSDictionarySummaryProvider<false>,
439                 "NSDictionary summary provider", ConstString("__NSDictionaryM"),
440                 appkit_flags);
441   AddCXXSummary(objc_category_sp,
442                 lldb_private::formatters::NSDictionarySummaryProvider<true>,
443                 "NSDictionary summary provider", ConstString("CFDictionaryRef"),
444                 appkit_flags);
445   AddCXXSummary(objc_category_sp,
446                 lldb_private::formatters::NSDictionarySummaryProvider<true>,
447                 "NSDictionary summary provider",
448                 ConstString("CFMutableDictionaryRef"), appkit_flags);
449 
450   AddCXXSummary(objc_category_sp,
451                 lldb_private::formatters::NSSetSummaryProvider<false>,
452                 "NSSet summary", ConstString("NSSet"), appkit_flags);
453   AddCXXSummary(
454       objc_category_sp, lldb_private::formatters::NSSetSummaryProvider<false>,
455       "NSMutableSet summary", ConstString("NSMutableSet"), appkit_flags);
456   AddCXXSummary(objc_category_sp,
457                 lldb_private::formatters::NSSetSummaryProvider<true>,
458                 "CFSetRef summary", ConstString("CFSetRef"), appkit_flags);
459   AddCXXSummary(
460       objc_category_sp, lldb_private::formatters::NSSetSummaryProvider<true>,
461       "CFMutableSetRef summary", ConstString("CFMutableSetRef"), appkit_flags);
462   AddCXXSummary(objc_category_sp,
463                 lldb_private::formatters::NSSetSummaryProvider<false>,
464                 "__NSCFSet summary", ConstString("__NSCFSet"), appkit_flags);
465   AddCXXSummary(objc_category_sp,
466                 lldb_private::formatters::NSSetSummaryProvider<false>,
467                 "__NSSetI summary", ConstString("__NSSetI"), appkit_flags);
468   AddCXXSummary(objc_category_sp,
469                 lldb_private::formatters::NSSetSummaryProvider<false>,
470                 "__NSSetM summary", ConstString("__NSSetM"), appkit_flags);
471   AddCXXSummary(
472       objc_category_sp, lldb_private::formatters::NSSetSummaryProvider<false>,
473       "NSCountedSet summary", ConstString("NSCountedSet"), appkit_flags);
474   AddCXXSummary(
475       objc_category_sp, lldb_private::formatters::NSSetSummaryProvider<false>,
476       "NSMutableSet summary", ConstString("NSMutableSet"), appkit_flags);
477   AddCXXSummary(
478       objc_category_sp, lldb_private::formatters::NSSetSummaryProvider<false>,
479       "NSOrderedSet summary", ConstString("NSOrderedSet"), appkit_flags);
480   AddCXXSummary(
481       objc_category_sp, lldb_private::formatters::NSSetSummaryProvider<false>,
482       "__NSOrderedSetI summary", ConstString("__NSOrderedSetI"), appkit_flags);
483   AddCXXSummary(
484       objc_category_sp, lldb_private::formatters::NSSetSummaryProvider<false>,
485       "__NSOrderedSetM summary", ConstString("__NSOrderedSetM"), appkit_flags);
486 
487   AddCXXSummary(
488       objc_category_sp, lldb_private::formatters::NSError_SummaryProvider,
489       "NSError summary provider", ConstString("NSError"), appkit_flags);
490   AddCXXSummary(
491       objc_category_sp, lldb_private::formatters::NSException_SummaryProvider,
492       "NSException summary provider", ConstString("NSException"), appkit_flags);
493 
494   // AddSummary(appkit_category_sp, "${var.key%@} -> ${var.value%@}",
495   // ConstString("$_lldb_typegen_nspair"), appkit_flags);
496 
497   appkit_flags.SetDontShowChildren(true);
498 
499   AddCXXSynthetic(objc_category_sp,
500                   lldb_private::formatters::NSArraySyntheticFrontEndCreator,
501                   "NSArray synthetic children", ConstString("__NSArrayM"),
502                   ScriptedSyntheticChildren::Flags());
503   AddCXXSynthetic(objc_category_sp,
504                   lldb_private::formatters::NSArraySyntheticFrontEndCreator,
505                   "NSArray synthetic children", ConstString("__NSArrayI"),
506                   ScriptedSyntheticChildren::Flags());
507   AddCXXSynthetic(objc_category_sp,
508                   lldb_private::formatters::NSArraySyntheticFrontEndCreator,
509                   "NSArray synthetic children", ConstString("__NSArray0"),
510                   ScriptedSyntheticChildren::Flags());
511   AddCXXSynthetic(objc_category_sp,
512                   lldb_private::formatters::NSArraySyntheticFrontEndCreator,
513                   "NSArray synthetic children",
514                   ConstString("__NSSingleObjectArrayI"),
515                   ScriptedSyntheticChildren::Flags());
516   AddCXXSynthetic(objc_category_sp,
517                   lldb_private::formatters::NSArraySyntheticFrontEndCreator,
518                   "NSArray synthetic children", ConstString("NSArray"),
519                   ScriptedSyntheticChildren::Flags());
520   AddCXXSynthetic(objc_category_sp,
521                   lldb_private::formatters::NSArraySyntheticFrontEndCreator,
522                   "NSArray synthetic children", ConstString("NSMutableArray"),
523                   ScriptedSyntheticChildren::Flags());
524   AddCXXSynthetic(objc_category_sp,
525                   lldb_private::formatters::NSArraySyntheticFrontEndCreator,
526                   "NSArray synthetic children", ConstString("__NSCFArray"),
527                   ScriptedSyntheticChildren::Flags());
528   AddCXXSynthetic(objc_category_sp,
529                   lldb_private::formatters::NSArraySyntheticFrontEndCreator,
530                   "NSArray synthetic children", ConstString("_NSCallStackArray"),
531                   ScriptedSyntheticChildren::Flags());
532   AddCXXSynthetic(objc_category_sp,
533                   lldb_private::formatters::NSArraySyntheticFrontEndCreator,
534                   "NSArray synthetic children",
535                   ConstString("CFMutableArrayRef"),
536                   ScriptedSyntheticChildren::Flags());
537   AddCXXSynthetic(objc_category_sp,
538                   lldb_private::formatters::NSArraySyntheticFrontEndCreator,
539                   "NSArray synthetic children", ConstString("CFArrayRef"),
540                   ScriptedSyntheticChildren::Flags());
541 
542   AddCXXSynthetic(
543       objc_category_sp,
544       lldb_private::formatters::NSDictionarySyntheticFrontEndCreator,
545       "NSDictionary synthetic children", ConstString("__NSDictionaryM"),
546       ScriptedSyntheticChildren::Flags());
547   AddCXXSynthetic(
548       objc_category_sp,
549       lldb_private::formatters::NSDictionarySyntheticFrontEndCreator,
550       "NSDictionary synthetic children", ConstString("__NSDictionaryI"),
551       ScriptedSyntheticChildren::Flags());
552   AddCXXSynthetic(
553       objc_category_sp,
554       lldb_private::formatters::NSDictionarySyntheticFrontEndCreator,
555       "NSDictionary synthetic children",
556       ConstString("__NSSingleEntryDictionaryI"),
557       ScriptedSyntheticChildren::Flags());
558   AddCXXSynthetic(
559       objc_category_sp,
560       lldb_private::formatters::NSDictionarySyntheticFrontEndCreator,
561       "NSDictionary synthetic children", ConstString("__NSCFDictionary"),
562       ScriptedSyntheticChildren::Flags());
563   AddCXXSynthetic(
564       objc_category_sp,
565       lldb_private::formatters::NSDictionarySyntheticFrontEndCreator,
566       "NSDictionary synthetic children", ConstString("NSDictionary"),
567       ScriptedSyntheticChildren::Flags());
568   AddCXXSynthetic(
569       objc_category_sp,
570       lldb_private::formatters::NSDictionarySyntheticFrontEndCreator,
571       "NSDictionary synthetic children", ConstString("NSMutableDictionary"),
572       ScriptedSyntheticChildren::Flags());
573   AddCXXSynthetic(
574       objc_category_sp,
575       lldb_private::formatters::NSDictionarySyntheticFrontEndCreator,
576       "NSDictionary synthetic children", ConstString("CFDictionaryRef"),
577       ScriptedSyntheticChildren::Flags());
578   AddCXXSynthetic(
579       objc_category_sp,
580       lldb_private::formatters::NSDictionarySyntheticFrontEndCreator,
581       "NSDictionary synthetic children", ConstString("CFMutableDictionaryRef"),
582       ScriptedSyntheticChildren::Flags());
583 
584   AddCXXSynthetic(objc_category_sp,
585                   lldb_private::formatters::NSErrorSyntheticFrontEndCreator,
586                   "NSError synthetic children", ConstString("NSError"),
587                   ScriptedSyntheticChildren::Flags());
588   AddCXXSynthetic(objc_category_sp,
589                   lldb_private::formatters::NSExceptionSyntheticFrontEndCreator,
590                   "NSException synthetic children", ConstString("NSException"),
591                   ScriptedSyntheticChildren::Flags());
592 
593   AddCXXSynthetic(objc_category_sp,
594                   lldb_private::formatters::NSSetSyntheticFrontEndCreator,
595                   "NSSet synthetic children", ConstString("NSSet"),
596                   ScriptedSyntheticChildren::Flags());
597   AddCXXSynthetic(objc_category_sp,
598                   lldb_private::formatters::NSSetSyntheticFrontEndCreator,
599                   "__NSSetI synthetic children", ConstString("__NSSetI"),
600                   ScriptedSyntheticChildren::Flags());
601   AddCXXSynthetic(objc_category_sp,
602                   lldb_private::formatters::NSSetSyntheticFrontEndCreator,
603                   "__NSSetM synthetic children", ConstString("__NSSetM"),
604                   ScriptedSyntheticChildren::Flags());
605   AddCXXSynthetic(
606       objc_category_sp, lldb_private::formatters::NSSetSyntheticFrontEndCreator,
607       "NSMutableSet synthetic children", ConstString("NSMutableSet"),
608       ScriptedSyntheticChildren::Flags());
609   AddCXXSynthetic(
610       objc_category_sp, lldb_private::formatters::NSSetSyntheticFrontEndCreator,
611       "NSOrderedSet synthetic children", ConstString("NSOrderedSet"),
612       ScriptedSyntheticChildren::Flags());
613   AddCXXSynthetic(
614       objc_category_sp, lldb_private::formatters::NSSetSyntheticFrontEndCreator,
615       "__NSOrderedSetI synthetic children", ConstString("__NSOrderedSetI"),
616       ScriptedSyntheticChildren::Flags());
617   AddCXXSynthetic(
618       objc_category_sp, lldb_private::formatters::NSSetSyntheticFrontEndCreator,
619       "__NSOrderedSetM synthetic children", ConstString("__NSOrderedSetM"),
620       ScriptedSyntheticChildren::Flags());
621 
622   AddCXXSynthetic(objc_category_sp,
623                   lldb_private::formatters::NSIndexPathSyntheticFrontEndCreator,
624                   "NSIndexPath synthetic children", ConstString("NSIndexPath"),
625                   ScriptedSyntheticChildren::Flags());
626 
627   AddCXXSummary(
628       objc_category_sp, lldb_private::formatters::CFBagSummaryProvider,
629       "CFBag summary provider", ConstString("CFBagRef"), appkit_flags);
630   AddCXXSummary(objc_category_sp,
631                 lldb_private::formatters::CFBagSummaryProvider,
632                 "CFBag summary provider", ConstString("__CFBag"), appkit_flags);
633   AddCXXSummary(objc_category_sp,
634                 lldb_private::formatters::CFBagSummaryProvider,
635                 "CFBag summary provider", ConstString("const struct __CFBag"),
636                 appkit_flags);
637   AddCXXSummary(
638       objc_category_sp, lldb_private::formatters::CFBagSummaryProvider,
639       "CFBag summary provider", ConstString("CFMutableBagRef"), appkit_flags);
640 
641   AddCXXSummary(objc_category_sp,
642                 lldb_private::formatters::CFBinaryHeapSummaryProvider,
643                 "CFBinaryHeap summary provider", ConstString("CFBinaryHeapRef"),
644                 appkit_flags);
645   AddCXXSummary(objc_category_sp,
646                 lldb_private::formatters::CFBinaryHeapSummaryProvider,
647                 "CFBinaryHeap summary provider", ConstString("__CFBinaryHeap"),
648                 appkit_flags);
649 
650   AddCXXSummary(
651       objc_category_sp, lldb_private::formatters::NSStringSummaryProvider,
652       "NSString summary provider", ConstString("NSString"), appkit_flags);
653   AddCXXSummary(
654       objc_category_sp, lldb_private::formatters::NSStringSummaryProvider,
655       "NSString summary provider", ConstString("CFStringRef"), appkit_flags);
656   AddCXXSummary(
657       objc_category_sp, lldb_private::formatters::NSStringSummaryProvider,
658       "NSString summary provider", ConstString("__CFString"), appkit_flags);
659   AddCXXSummary(objc_category_sp,
660                 lldb_private::formatters::NSStringSummaryProvider,
661                 "NSString summary provider", ConstString("CFMutableStringRef"),
662                 appkit_flags);
663   AddCXXSummary(objc_category_sp,
664                 lldb_private::formatters::NSStringSummaryProvider,
665                 "NSString summary provider", ConstString("NSMutableString"),
666                 appkit_flags);
667   AddCXXSummary(objc_category_sp,
668                 lldb_private::formatters::NSStringSummaryProvider,
669                 "NSString summary provider",
670                 ConstString("__NSCFConstantString"), appkit_flags);
671   AddCXXSummary(
672       objc_category_sp, lldb_private::formatters::NSStringSummaryProvider,
673       "NSString summary provider", ConstString("__NSCFString"), appkit_flags);
674   AddCXXSummary(objc_category_sp,
675                 lldb_private::formatters::NSStringSummaryProvider,
676                 "NSString summary provider", ConstString("NSCFConstantString"),
677                 appkit_flags);
678   AddCXXSummary(
679       objc_category_sp, lldb_private::formatters::NSStringSummaryProvider,
680       "NSString summary provider", ConstString("NSCFString"), appkit_flags);
681   AddCXXSummary(
682       objc_category_sp, lldb_private::formatters::NSStringSummaryProvider,
683       "NSString summary provider", ConstString("NSPathStore2"), appkit_flags);
684   AddCXXSummary(objc_category_sp,
685                 lldb_private::formatters::NSStringSummaryProvider,
686                 "NSString summary provider",
687                 ConstString("NSTaggedPointerString"), appkit_flags);
688 
689   AddCXXSummary(objc_category_sp,
690                 lldb_private::formatters::NSAttributedStringSummaryProvider,
691                 "NSAttributedString summary provider",
692                 ConstString("NSAttributedString"), appkit_flags);
693   AddCXXSummary(
694       objc_category_sp,
695       lldb_private::formatters::NSMutableAttributedStringSummaryProvider,
696       "NSMutableAttributedString summary provider",
697       ConstString("NSMutableAttributedString"), appkit_flags);
698   AddCXXSummary(
699       objc_category_sp,
700       lldb_private::formatters::NSMutableAttributedStringSummaryProvider,
701       "NSMutableAttributedString summary provider",
702       ConstString("NSConcreteMutableAttributedString"), appkit_flags);
703 
704   AddCXXSummary(
705       objc_category_sp, lldb_private::formatters::NSBundleSummaryProvider,
706       "NSBundle summary provider", ConstString("NSBundle"), appkit_flags);
707 
708   AddCXXSummary(objc_category_sp,
709                 lldb_private::formatters::NSDataSummaryProvider<false>,
710                 "NSData summary provider", ConstString("NSData"), appkit_flags);
711   AddCXXSummary(
712       objc_category_sp, lldb_private::formatters::NSDataSummaryProvider<false>,
713       "NSData summary provider", ConstString("_NSInlineData"), appkit_flags);
714   AddCXXSummary(
715       objc_category_sp, lldb_private::formatters::NSDataSummaryProvider<false>,
716       "NSData summary provider", ConstString("NSConcreteData"), appkit_flags);
717   AddCXXSummary(objc_category_sp,
718                 lldb_private::formatters::NSDataSummaryProvider<false>,
719                 "NSData summary provider", ConstString("NSConcreteMutableData"),
720                 appkit_flags);
721   AddCXXSummary(
722       objc_category_sp, lldb_private::formatters::NSDataSummaryProvider<false>,
723       "NSData summary provider", ConstString("NSMutableData"), appkit_flags);
724   AddCXXSummary(
725       objc_category_sp, lldb_private::formatters::NSDataSummaryProvider<false>,
726       "NSData summary provider", ConstString("__NSCFData"), appkit_flags);
727   AddCXXSummary(
728       objc_category_sp, lldb_private::formatters::NSDataSummaryProvider<true>,
729       "NSData summary provider", ConstString("CFDataRef"), appkit_flags);
730   AddCXXSummary(
731       objc_category_sp, lldb_private::formatters::NSDataSummaryProvider<true>,
732       "NSData summary provider", ConstString("CFMutableDataRef"), appkit_flags);
733 
734   AddCXXSummary(
735       objc_category_sp, lldb_private::formatters::NSMachPortSummaryProvider,
736       "NSMachPort summary provider", ConstString("NSMachPort"), appkit_flags);
737 
738   AddCXXSummary(objc_category_sp,
739                 lldb_private::formatters::NSNotificationSummaryProvider,
740                 "NSNotification summary provider",
741                 ConstString("NSNotification"), appkit_flags);
742   AddCXXSummary(objc_category_sp,
743                 lldb_private::formatters::NSNotificationSummaryProvider,
744                 "NSNotification summary provider",
745                 ConstString("NSConcreteNotification"), appkit_flags);
746 
747   AddCXXSummary(
748       objc_category_sp, lldb_private::formatters::NSNumberSummaryProvider,
749       "NSNumber summary provider", ConstString("NSNumber"), appkit_flags);
750   AddCXXSummary(
751       objc_category_sp, lldb_private::formatters::NSNumberSummaryProvider,
752       "CFNumberRef summary provider", ConstString("CFNumberRef"), appkit_flags);
753   AddCXXSummary(
754       objc_category_sp, lldb_private::formatters::NSNumberSummaryProvider,
755       "NSNumber summary provider", ConstString("__NSCFBoolean"), appkit_flags);
756   AddCXXSummary(
757       objc_category_sp, lldb_private::formatters::NSNumberSummaryProvider,
758       "NSNumber summary provider", ConstString("__NSCFNumber"), appkit_flags);
759   AddCXXSummary(
760       objc_category_sp, lldb_private::formatters::NSNumberSummaryProvider,
761       "NSNumber summary provider", ConstString("NSCFBoolean"), appkit_flags);
762   AddCXXSummary(
763       objc_category_sp, lldb_private::formatters::NSNumberSummaryProvider,
764       "NSNumber summary provider", ConstString("NSCFNumber"), appkit_flags);
765   AddCXXSummary(objc_category_sp,
766                 lldb_private::formatters::NSNumberSummaryProvider,
767                 "NSDecimalNumber summary provider",
768                 ConstString("NSDecimalNumber"), appkit_flags);
769 
770   AddCXXSummary(objc_category_sp,
771                 lldb_private::formatters::NSURLSummaryProvider,
772                 "NSURL summary provider", ConstString("NSURL"), appkit_flags);
773   AddCXXSummary(
774       objc_category_sp, lldb_private::formatters::NSURLSummaryProvider,
775       "NSURL summary provider", ConstString("CFURLRef"), appkit_flags);
776 
777   AddCXXSummary(objc_category_sp,
778                 lldb_private::formatters::NSDateSummaryProvider,
779                 "NSDate summary provider", ConstString("NSDate"), appkit_flags);
780   AddCXXSummary(
781       objc_category_sp, lldb_private::formatters::NSDateSummaryProvider,
782       "NSDate summary provider", ConstString("__NSDate"), appkit_flags);
783   AddCXXSummary(
784       objc_category_sp, lldb_private::formatters::NSDateSummaryProvider,
785       "NSDate summary provider", ConstString("__NSTaggedDate"), appkit_flags);
786   AddCXXSummary(
787       objc_category_sp, lldb_private::formatters::NSDateSummaryProvider,
788       "NSDate summary provider", ConstString("NSCalendarDate"), appkit_flags);
789 
790   AddCXXSummary(
791       objc_category_sp, lldb_private::formatters::NSTimeZoneSummaryProvider,
792       "NSTimeZone summary provider", ConstString("NSTimeZone"), appkit_flags);
793   AddCXXSummary(objc_category_sp,
794                 lldb_private::formatters::NSTimeZoneSummaryProvider,
795                 "NSTimeZone summary provider", ConstString("CFTimeZoneRef"),
796                 appkit_flags);
797   AddCXXSummary(
798       objc_category_sp, lldb_private::formatters::NSTimeZoneSummaryProvider,
799       "NSTimeZone summary provider", ConstString("__NSTimeZone"), appkit_flags);
800 
801   // CFAbsoluteTime is actually a double rather than a pointer to an object we
802   // do not care about the numeric value, since it is probably meaningless to
803   // users
804   appkit_flags.SetDontShowValue(true);
805   AddCXXSummary(objc_category_sp,
806                 lldb_private::formatters::CFAbsoluteTimeSummaryProvider,
807                 "CFAbsoluteTime summary provider",
808                 ConstString("CFAbsoluteTime"), appkit_flags);
809   appkit_flags.SetDontShowValue(false);
810 
811   AddCXXSummary(
812       objc_category_sp, lldb_private::formatters::NSIndexSetSummaryProvider,
813       "NSIndexSet summary provider", ConstString("NSIndexSet"), appkit_flags);
814   AddCXXSummary(objc_category_sp,
815                 lldb_private::formatters::NSIndexSetSummaryProvider,
816                 "NSIndexSet summary provider", ConstString("NSMutableIndexSet"),
817                 appkit_flags);
818 
819   AddStringSummary(objc_category_sp,
820                    "@\"${var.month%d}/${var.day%d}/${var.year%d} "
821                    "${var.hour%d}:${var.minute%d}:${var.second}\"",
822                    ConstString("CFGregorianDate"), appkit_flags);
823 
824   AddCXXSummary(objc_category_sp,
825                 lldb_private::formatters::CFBitVectorSummaryProvider,
826                 "CFBitVector summary provider", ConstString("CFBitVectorRef"),
827                 appkit_flags);
828   AddCXXSummary(objc_category_sp,
829                 lldb_private::formatters::CFBitVectorSummaryProvider,
830                 "CFBitVector summary provider",
831                 ConstString("CFMutableBitVectorRef"), appkit_flags);
832   AddCXXSummary(objc_category_sp,
833                 lldb_private::formatters::CFBitVectorSummaryProvider,
834                 "CFBitVector summary provider", ConstString("__CFBitVector"),
835                 appkit_flags);
836   AddCXXSummary(objc_category_sp,
837                 lldb_private::formatters::CFBitVectorSummaryProvider,
838                 "CFBitVector summary provider",
839                 ConstString("__CFMutableBitVector"), appkit_flags);
840 }
841 
842 static void LoadCoreMediaFormatters(TypeCategoryImplSP objc_category_sp) {
843   if (!objc_category_sp)
844     return;
845 
846   TypeSummaryImpl::Flags cm_flags;
847   cm_flags.SetCascades(true)
848       .SetDontShowChildren(false)
849       .SetDontShowValue(false)
850       .SetHideItemNames(false)
851       .SetShowMembersOneLiner(false)
852       .SetSkipPointers(false)
853       .SetSkipReferences(false);
854 
855   AddCXXSummary(objc_category_sp,
856                 lldb_private::formatters::CMTimeSummaryProvider,
857                 "CMTime summary provider", ConstString("CMTime"), cm_flags);
858 }
859 
860 lldb::TypeCategoryImplSP ObjCLanguage::GetFormatters() {
861   static llvm::once_flag g_initialize;
862   static TypeCategoryImplSP g_category;
863 
864   llvm::call_once(g_initialize, [this]() -> void {
865     DataVisualization::Categories::GetCategory(GetPluginName(), g_category);
866     if (g_category) {
867       LoadCoreMediaFormatters(g_category);
868       LoadObjCFormatters(g_category);
869     }
870   });
871   return g_category;
872 }
873 
874 std::vector<ConstString>
875 ObjCLanguage::GetPossibleFormattersMatches(ValueObject &valobj,
876                                            lldb::DynamicValueType use_dynamic) {
877   std::vector<ConstString> result;
878 
879   if (use_dynamic == lldb::eNoDynamicValues)
880     return result;
881 
882   CompilerType compiler_type(valobj.GetCompilerType());
883 
884   const bool check_cpp = false;
885   const bool check_objc = true;
886   bool canBeObjCDynamic =
887       compiler_type.IsPossibleDynamicType(nullptr, check_cpp, check_objc);
888 
889   if (canBeObjCDynamic) {
890     do {
891       lldb::ProcessSP process_sp = valobj.GetProcessSP();
892       if (!process_sp)
893         break;
894       ObjCLanguageRuntime *runtime = process_sp->GetObjCLanguageRuntime();
895       if (runtime == nullptr)
896         break;
897       ObjCLanguageRuntime::ClassDescriptorSP objc_class_sp(
898           runtime->GetClassDescriptor(valobj));
899       if (!objc_class_sp)
900         break;
901       if (ConstString name = objc_class_sp->GetClassName())
902         result.push_back(name);
903     } while (false);
904   }
905 
906   return result;
907 }
908 
909 std::unique_ptr<Language::TypeScavenger> ObjCLanguage::GetTypeScavenger() {
910   class ObjCScavengerResult : public Language::TypeScavenger::Result {
911   public:
912     ObjCScavengerResult(CompilerType type)
913         : Language::TypeScavenger::Result(), m_compiler_type(type) {}
914 
915     bool IsValid() override { return m_compiler_type.IsValid(); }
916 
917     bool DumpToStream(Stream &stream, bool print_help_if_available) override {
918       if (IsValid()) {
919         m_compiler_type.DumpTypeDescription(&stream);
920         stream.EOL();
921         return true;
922       }
923       return false;
924     }
925 
926   private:
927     CompilerType m_compiler_type;
928   };
929 
930   class ObjCRuntimeScavenger : public Language::TypeScavenger {
931   protected:
932     bool Find_Impl(ExecutionContextScope *exe_scope, const char *key,
933                    ResultSet &results) override {
934       bool result = false;
935 
936       Process *process = exe_scope->CalculateProcess().get();
937       if (process) {
938         const bool create_on_demand = false;
939         auto objc_runtime = process->GetObjCLanguageRuntime(create_on_demand);
940         if (objc_runtime) {
941           auto decl_vendor = objc_runtime->GetDeclVendor();
942           if (decl_vendor) {
943             std::vector<clang::NamedDecl *> decls;
944             ConstString name(key);
945             decl_vendor->FindDecls(name, true, UINT32_MAX, decls);
946             for (auto decl : decls) {
947               if (decl) {
948                 if (CompilerType candidate =
949                         ClangASTContext::GetTypeForDecl(decl)) {
950                   result = true;
951                   std::unique_ptr<Language::TypeScavenger::Result> result(
952                       new ObjCScavengerResult(candidate));
953                   results.insert(std::move(result));
954                 }
955               }
956             }
957           }
958         }
959       }
960 
961       return result;
962     }
963 
964     friend class lldb_private::ObjCLanguage;
965   };
966 
967   class ObjCModulesScavenger : public Language::TypeScavenger {
968   protected:
969     bool Find_Impl(ExecutionContextScope *exe_scope, const char *key,
970                    ResultSet &results) override {
971       bool result = false;
972 
973       Target *target = exe_scope->CalculateTarget().get();
974       if (target) {
975         if (auto clang_modules_decl_vendor =
976                 target->GetClangModulesDeclVendor()) {
977           std::vector<clang::NamedDecl *> decls;
978           ConstString key_cs(key);
979 
980           if (clang_modules_decl_vendor->FindDecls(key_cs, false, UINT32_MAX,
981                                                    decls) > 0 &&
982               !decls.empty()) {
983             CompilerType module_type =
984                 ClangASTContext::GetTypeForDecl(decls.front());
985             result = true;
986             std::unique_ptr<Language::TypeScavenger::Result> result(
987                 new ObjCScavengerResult(module_type));
988             results.insert(std::move(result));
989           }
990         }
991       }
992 
993       return result;
994     }
995 
996     friend class lldb_private::ObjCLanguage;
997   };
998 
999   class ObjCDebugInfoScavenger : public Language::ImageListTypeScavenger {
1000   public:
1001     virtual CompilerType AdjustForInclusion(CompilerType &candidate) override {
1002       LanguageType lang_type(candidate.GetMinimumLanguage());
1003       if (!Language::LanguageIsObjC(lang_type))
1004         return CompilerType();
1005       if (candidate.IsTypedefType())
1006         return candidate.GetTypedefedType();
1007       return candidate;
1008     }
1009   };
1010 
1011   return std::unique_ptr<TypeScavenger>(
1012       new Language::EitherTypeScavenger<ObjCModulesScavenger,
1013                                         ObjCRuntimeScavenger,
1014                                         ObjCDebugInfoScavenger>());
1015 }
1016 
1017 bool ObjCLanguage::GetFormatterPrefixSuffix(ValueObject &valobj,
1018                                             ConstString type_hint,
1019                                             std::string &prefix,
1020                                             std::string &suffix) {
1021   static ConstString g_CFBag("CFBag");
1022   static ConstString g_CFBinaryHeap("CFBinaryHeap");
1023 
1024   static ConstString g_NSNumberChar("NSNumber:char");
1025   static ConstString g_NSNumberShort("NSNumber:short");
1026   static ConstString g_NSNumberInt("NSNumber:int");
1027   static ConstString g_NSNumberLong("NSNumber:long");
1028   static ConstString g_NSNumberInt128("NSNumber:int128_t");
1029   static ConstString g_NSNumberFloat("NSNumber:float");
1030   static ConstString g_NSNumberDouble("NSNumber:double");
1031 
1032   static ConstString g_NSData("NSData");
1033   static ConstString g_NSArray("NSArray");
1034   static ConstString g_NSString("NSString");
1035   static ConstString g_NSStringStar("NSString*");
1036 
1037   if (type_hint.IsEmpty())
1038     return false;
1039 
1040   prefix.clear();
1041   suffix.clear();
1042 
1043   if (type_hint == g_CFBag || type_hint == g_CFBinaryHeap) {
1044     prefix = "@";
1045     return true;
1046   }
1047 
1048   if (type_hint == g_NSNumberChar) {
1049     prefix = "(char)";
1050     return true;
1051   }
1052   if (type_hint == g_NSNumberShort) {
1053     prefix = "(short)";
1054     return true;
1055   }
1056   if (type_hint == g_NSNumberInt) {
1057     prefix = "(int)";
1058     return true;
1059   }
1060   if (type_hint == g_NSNumberLong) {
1061     prefix = "(long)";
1062     return true;
1063   }
1064   if (type_hint == g_NSNumberInt128) {
1065     prefix = "(int128_t)";
1066     return true;
1067   }
1068   if (type_hint == g_NSNumberFloat) {
1069     prefix = "(float)";
1070     return true;
1071   }
1072   if (type_hint == g_NSNumberDouble) {
1073     prefix = "(double)";
1074     return true;
1075   }
1076 
1077   if (type_hint == g_NSData || type_hint == g_NSArray) {
1078     prefix = "@\"";
1079     suffix = "\"";
1080     return true;
1081   }
1082 
1083   if (type_hint == g_NSString || type_hint == g_NSStringStar) {
1084     prefix = "@";
1085     return true;
1086   }
1087 
1088   return false;
1089 }
1090 
1091 bool ObjCLanguage::IsNilReference(ValueObject &valobj) {
1092   const uint32_t mask = eTypeIsObjC | eTypeIsPointer;
1093   bool isObjCpointer =
1094       (((valobj.GetCompilerType().GetTypeInfo(nullptr)) & mask) == mask);
1095   if (!isObjCpointer)
1096     return false;
1097   bool canReadValue = true;
1098   bool isZero = valobj.GetValueAsUnsigned(0, &canReadValue) == 0;
1099   return canReadValue && isZero;
1100 }
1101 
1102 bool ObjCLanguage::IsSourceFile(llvm::StringRef file_path) const {
1103   const auto suffixes = {".h", ".m", ".M"};
1104   for (auto suffix : suffixes) {
1105     if (file_path.endswith_lower(suffix))
1106       return true;
1107   }
1108   return false;
1109 }
1110