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