xref: /freebsd/contrib/llvm-project/lldb/source/Symbol/Variable.cpp (revision 5f757f3ff9144b609b3c433dfd370cc6bdc191ad) 
1 //===-- Variable.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 "lldb/Symbol/Variable.h"
10 
11 #include "lldb/Core/Module.h"
12 #include "lldb/Core/ValueObject.h"
13 #include "lldb/Core/ValueObjectVariable.h"
14 #include "lldb/Symbol/Block.h"
15 #include "lldb/Symbol/CompileUnit.h"
16 #include "lldb/Symbol/CompilerDecl.h"
17 #include "lldb/Symbol/CompilerDeclContext.h"
18 #include "lldb/Symbol/Function.h"
19 #include "lldb/Symbol/SymbolContext.h"
20 #include "lldb/Symbol/SymbolFile.h"
21 #include "lldb/Symbol/Type.h"
22 #include "lldb/Symbol/TypeSystem.h"
23 #include "lldb/Symbol/VariableList.h"
24 #include "lldb/Target/ABI.h"
25 #include "lldb/Target/Process.h"
26 #include "lldb/Target/RegisterContext.h"
27 #include "lldb/Target/StackFrame.h"
28 #include "lldb/Target/Target.h"
29 #include "lldb/Target/Thread.h"
30 #include "lldb/Utility/RegularExpression.h"
31 #include "lldb/Utility/Stream.h"
32 
33 #include "llvm/ADT/Twine.h"
34 
35 using namespace lldb;
36 using namespace lldb_private;
37 
38 Variable::Variable(lldb::user_id_t uid, const char *name, const char *mangled,
39                    const lldb::SymbolFileTypeSP &symfile_type_sp,
40                    ValueType scope, SymbolContextScope *context,
41                    const RangeList &scope_range, Declaration *decl_ptr,
42                    const DWARFExpressionList &location_list, bool external,
43                    bool artificial, bool location_is_constant_data,
44                    bool static_member)
45     : UserID(uid), m_name(name), m_mangled(ConstString(mangled)),
46       m_symfile_type_sp(symfile_type_sp), m_scope(scope),
47       m_owner_scope(context), m_scope_range(scope_range),
48       m_declaration(decl_ptr), m_location_list(location_list), m_external(external),
49       m_artificial(artificial), m_loc_is_const_data(location_is_constant_data),
50       m_static_member(static_member) {}
51 
52 Variable::~Variable() = default;
53 
54 lldb::LanguageType Variable::GetLanguage() const {
55   lldb::LanguageType lang = m_mangled.GuessLanguage();
56   if (lang != lldb::eLanguageTypeUnknown)
57     return lang;
58 
59   if (auto *func = m_owner_scope->CalculateSymbolContextFunction()) {
60     if ((lang = func->GetLanguage()) != lldb::eLanguageTypeUnknown)
61       return lang;
62   } else if (auto *comp_unit =
63                  m_owner_scope->CalculateSymbolContextCompileUnit()) {
64     if ((lang = comp_unit->GetLanguage()) != lldb::eLanguageTypeUnknown)
65       return lang;
66   }
67 
68   return lldb::eLanguageTypeUnknown;
69 }
70 
71 ConstString Variable::GetName() const {
72   ConstString name = m_mangled.GetName();
73   if (name)
74     return name;
75   return m_name;
76 }
77 
78 ConstString Variable::GetUnqualifiedName() const { return m_name; }
79 
80 bool Variable::NameMatches(ConstString name) const {
81   if (m_name == name)
82     return true;
83   SymbolContext variable_sc;
84   m_owner_scope->CalculateSymbolContext(&variable_sc);
85 
86   return m_mangled.NameMatches(name);
87 }
88 bool Variable::NameMatches(const RegularExpression &regex) const {
89   if (regex.Execute(m_name.AsCString()))
90     return true;
91   if (m_mangled)
92     return m_mangled.NameMatches(regex);
93   return false;
94 }
95 
96 Type *Variable::GetType() {
97   if (m_symfile_type_sp)
98     return m_symfile_type_sp->GetType();
99   return nullptr;
100 }
101 
102 void Variable::Dump(Stream *s, bool show_context) const {
103   s->Printf("%p: ", static_cast<const void *>(this));
104   s->Indent();
105   *s << "Variable" << (const UserID &)*this;
106 
107   if (m_name)
108     *s << ", name = \"" << m_name << "\"";
109 
110   if (m_symfile_type_sp) {
111     Type *type = m_symfile_type_sp->GetType();
112     if (type) {
113       s->Format(", type = {{{0:x-16}} {1} (", type->GetID(), type);
114       type->DumpTypeName(s);
115       s->PutChar(')');
116     }
117   }
118 
119   if (m_scope != eValueTypeInvalid) {
120     s->PutCString(", scope = ");
121     switch (m_scope) {
122     case eValueTypeVariableGlobal:
123       s->PutCString(m_external ? "global" : "static");
124       break;
125     case eValueTypeVariableArgument:
126       s->PutCString("parameter");
127       break;
128     case eValueTypeVariableLocal:
129       s->PutCString("local");
130       break;
131     case eValueTypeVariableThreadLocal:
132       s->PutCString("thread local");
133       break;
134     default:
135       s->AsRawOstream() << "??? (" << m_scope << ')';
136     }
137   }
138 
139   if (show_context && m_owner_scope != nullptr) {
140     s->PutCString(", context = ( ");
141     m_owner_scope->DumpSymbolContext(s);
142     s->PutCString(" )");
143   }
144 
145   bool show_fullpaths = false;
146   m_declaration.Dump(s, show_fullpaths);
147 
148   if (m_location_list.IsValid()) {
149     s->PutCString(", location = ");
150     ABISP abi;
151     if (m_owner_scope) {
152       ModuleSP module_sp(m_owner_scope->CalculateSymbolContextModule());
153       if (module_sp)
154         abi = ABI::FindPlugin(ProcessSP(), module_sp->GetArchitecture());
155     }
156     m_location_list.GetDescription(s, lldb::eDescriptionLevelBrief, abi.get());
157   }
158 
159   if (m_external)
160     s->PutCString(", external");
161 
162   if (m_artificial)
163     s->PutCString(", artificial");
164 
165   s->EOL();
166 }
167 
168 bool Variable::DumpDeclaration(Stream *s, bool show_fullpaths,
169                                bool show_module) {
170   bool dumped_declaration_info = false;
171   if (m_owner_scope) {
172     SymbolContext sc;
173     m_owner_scope->CalculateSymbolContext(&sc);
174     sc.block = nullptr;
175     sc.line_entry.Clear();
176     bool show_inlined_frames = false;
177     const bool show_function_arguments = true;
178     const bool show_function_name = true;
179 
180     dumped_declaration_info = sc.DumpStopContext(
181         s, nullptr, Address(), show_fullpaths, show_module, show_inlined_frames,
182         show_function_arguments, show_function_name);
183 
184     if (sc.function)
185       s->PutChar(':');
186   }
187   if (m_declaration.DumpStopContext(s, false))
188     dumped_declaration_info = true;
189   return dumped_declaration_info;
190 }
191 
192 size_t Variable::MemorySize() const { return sizeof(Variable); }
193 
194 CompilerDeclContext Variable::GetDeclContext() {
195   Type *type = GetType();
196   if (type)
197     return type->GetSymbolFile()->GetDeclContextContainingUID(GetID());
198   return CompilerDeclContext();
199 }
200 
201 CompilerDecl Variable::GetDecl() {
202   Type *type = GetType();
203   return type ? type->GetSymbolFile()->GetDeclForUID(GetID()) : CompilerDecl();
204 }
205 
206 void Variable::CalculateSymbolContext(SymbolContext *sc) {
207   if (m_owner_scope) {
208     m_owner_scope->CalculateSymbolContext(sc);
209     sc->variable = this;
210   } else
211     sc->Clear(false);
212 }
213 
214 bool Variable::LocationIsValidForFrame(StackFrame *frame) {
215   if (frame) {
216     Function *function =
217         frame->GetSymbolContext(eSymbolContextFunction).function;
218     if (function) {
219       TargetSP target_sp(frame->CalculateTarget());
220 
221       addr_t loclist_base_load_addr =
222           function->GetAddressRange().GetBaseAddress().GetLoadAddress(
223               target_sp.get());
224       if (loclist_base_load_addr == LLDB_INVALID_ADDRESS)
225         return false;
226       // It is a location list. We just need to tell if the location list
227       // contains the current address when converted to a load address
228       return m_location_list.ContainsAddress(
229           loclist_base_load_addr,
230           frame->GetFrameCodeAddressForSymbolication().GetLoadAddress(
231               target_sp.get()));
232     }
233   }
234   return false;
235 }
236 
237 bool Variable::LocationIsValidForAddress(const Address &address) {
238   // Be sure to resolve the address to section offset prior to calling this
239   // function.
240   if (address.IsSectionOffset()) {
241     // We need to check if the address is valid for both scope range and value
242     // range.
243     // Empty scope range means block range.
244     bool valid_in_scope_range =
245         GetScopeRange().IsEmpty() || GetScopeRange().FindEntryThatContains(
246                                          address.GetFileAddress()) != nullptr;
247     if (!valid_in_scope_range)
248       return false;
249     SymbolContext sc;
250     CalculateSymbolContext(&sc);
251     if (sc.module_sp == address.GetModule()) {
252       // Is the variable is described by a single location?
253       if (m_location_list.IsAlwaysValidSingleExpr()) {
254         // Yes it is, the location is valid.
255         return true;
256       }
257 
258       if (sc.function) {
259         addr_t loclist_base_file_addr =
260             sc.function->GetAddressRange().GetBaseAddress().GetFileAddress();
261         if (loclist_base_file_addr == LLDB_INVALID_ADDRESS)
262           return false;
263         // It is a location list. We just need to tell if the location list
264         // contains the current address when converted to a load address
265         return m_location_list.ContainsAddress(loclist_base_file_addr,
266                                                address.GetFileAddress());
267       }
268     }
269   }
270   return false;
271 }
272 
273 bool Variable::IsInScope(StackFrame *frame) {
274   switch (m_scope) {
275   case eValueTypeRegister:
276   case eValueTypeRegisterSet:
277     return frame != nullptr;
278 
279   case eValueTypeConstResult:
280   case eValueTypeVariableGlobal:
281   case eValueTypeVariableStatic:
282   case eValueTypeVariableThreadLocal:
283     return true;
284 
285   case eValueTypeVariableArgument:
286   case eValueTypeVariableLocal:
287     if (frame) {
288       // We don't have a location list, we just need to see if the block that
289       // this variable was defined in is currently
290       Block *deepest_frame_block =
291           frame->GetSymbolContext(eSymbolContextBlock).block;
292       if (deepest_frame_block) {
293         SymbolContext variable_sc;
294         CalculateSymbolContext(&variable_sc);
295 
296         // Check for static or global variable defined at the compile unit
297         // level that wasn't defined in a block
298         if (variable_sc.block == nullptr)
299           return true;
300 
301         // Check if the variable is valid in the current block
302         if (variable_sc.block != deepest_frame_block &&
303             !variable_sc.block->Contains(deepest_frame_block))
304           return false;
305 
306         // If no scope range is specified then it means that the scope is the
307         // same as the scope of the enclosing lexical block.
308         if (m_scope_range.IsEmpty())
309           return true;
310 
311         addr_t file_address = frame->GetFrameCodeAddress().GetFileAddress();
312         return m_scope_range.FindEntryThatContains(file_address) != nullptr;
313       }
314     }
315     break;
316 
317   default:
318     break;
319   }
320   return false;
321 }
322 
323 Status Variable::GetValuesForVariableExpressionPath(
324     llvm::StringRef variable_expr_path, ExecutionContextScope *scope,
325     GetVariableCallback callback, void *baton, VariableList &variable_list,
326     ValueObjectList &valobj_list) {
327   Status error;
328   if (!callback || variable_expr_path.empty()) {
329     error.SetErrorString("unknown error");
330     return error;
331   }
332 
333   switch (variable_expr_path.front()) {
334   case '*':
335     error = Variable::GetValuesForVariableExpressionPath(
336         variable_expr_path.drop_front(), scope, callback, baton, variable_list,
337         valobj_list);
338     if (error.Fail()) {
339       error.SetErrorString("unknown error");
340       return error;
341     }
342     for (uint32_t i = 0; i < valobj_list.GetSize();) {
343       Status tmp_error;
344       ValueObjectSP valobj_sp(
345           valobj_list.GetValueObjectAtIndex(i)->Dereference(tmp_error));
346       if (tmp_error.Fail()) {
347         variable_list.RemoveVariableAtIndex(i);
348         valobj_list.RemoveValueObjectAtIndex(i);
349       } else {
350         valobj_list.SetValueObjectAtIndex(i, valobj_sp);
351         ++i;
352       }
353     }
354     return error;
355   case '&': {
356     error = Variable::GetValuesForVariableExpressionPath(
357         variable_expr_path.drop_front(), scope, callback, baton, variable_list,
358         valobj_list);
359     if (error.Success()) {
360       for (uint32_t i = 0; i < valobj_list.GetSize();) {
361         Status tmp_error;
362         ValueObjectSP valobj_sp(
363             valobj_list.GetValueObjectAtIndex(i)->AddressOf(tmp_error));
364         if (tmp_error.Fail()) {
365           variable_list.RemoveVariableAtIndex(i);
366           valobj_list.RemoveValueObjectAtIndex(i);
367         } else {
368           valobj_list.SetValueObjectAtIndex(i, valobj_sp);
369           ++i;
370         }
371       }
372     } else {
373       error.SetErrorString("unknown error");
374     }
375     return error;
376   } break;
377 
378   default: {
379     static RegularExpression g_regex(
380         llvm::StringRef("^([A-Za-z_:][A-Za-z_0-9:]*)(.*)"));
381     llvm::SmallVector<llvm::StringRef, 2> matches;
382     variable_list.Clear();
383     if (!g_regex.Execute(variable_expr_path, &matches)) {
384       error.SetErrorStringWithFormatv(
385           "unable to extract a variable name from '{0}'", variable_expr_path);
386       return error;
387     }
388     std::string variable_name = matches[1].str();
389     if (!callback(baton, variable_name.c_str(), variable_list)) {
390       error.SetErrorString("unknown error");
391       return error;
392     }
393     uint32_t i = 0;
394     while (i < variable_list.GetSize()) {
395       VariableSP var_sp(variable_list.GetVariableAtIndex(i));
396       ValueObjectSP valobj_sp;
397       if (!var_sp) {
398         variable_list.RemoveVariableAtIndex(i);
399         continue;
400       }
401       ValueObjectSP variable_valobj_sp(
402           ValueObjectVariable::Create(scope, var_sp));
403       if (!variable_valobj_sp) {
404         variable_list.RemoveVariableAtIndex(i);
405         continue;
406       }
407 
408       llvm::StringRef variable_sub_expr_path =
409           variable_expr_path.drop_front(variable_name.size());
410       if (!variable_sub_expr_path.empty()) {
411         valobj_sp = variable_valobj_sp->GetValueForExpressionPath(
412             variable_sub_expr_path);
413         if (!valobj_sp) {
414           error.SetErrorStringWithFormatv(
415               "invalid expression path '{0}' for variable '{1}'",
416               variable_sub_expr_path, var_sp->GetName().GetCString());
417           variable_list.RemoveVariableAtIndex(i);
418           continue;
419         }
420       } else {
421         // Just the name of a variable with no extras
422         valobj_sp = variable_valobj_sp;
423       }
424 
425       valobj_list.Append(valobj_sp);
426       ++i;
427     }
428 
429     if (variable_list.GetSize() > 0) {
430       error.Clear();
431       return error;
432     }
433   } break;
434   }
435   error.SetErrorString("unknown error");
436   return error;
437 }
438 
439 bool Variable::DumpLocations(Stream *s, const Address &address) {
440   SymbolContext sc;
441   CalculateSymbolContext(&sc);
442   ABISP abi;
443   if (m_owner_scope) {
444     ModuleSP module_sp(m_owner_scope->CalculateSymbolContextModule());
445     if (module_sp)
446       abi = ABI::FindPlugin(ProcessSP(), module_sp->GetArchitecture());
447   }
448 
449   const addr_t file_addr = address.GetFileAddress();
450   if (sc.function) {
451     addr_t loclist_base_file_addr =
452         sc.function->GetAddressRange().GetBaseAddress().GetFileAddress();
453     if (loclist_base_file_addr == LLDB_INVALID_ADDRESS)
454       return false;
455     return m_location_list.DumpLocations(s, eDescriptionLevelBrief,
456                                          loclist_base_file_addr, file_addr,
457                                          abi.get());
458   }
459   return false;
460 }
461 
462 static void PrivateAutoComplete(
463     StackFrame *frame, llvm::StringRef partial_path,
464     const llvm::Twine
465         &prefix_path, // Anything that has been resolved already will be in here
466     const CompilerType &compiler_type, CompletionRequest &request);
467 
468 static void PrivateAutoCompleteMembers(
469     StackFrame *frame, const std::string &partial_member_name,
470     llvm::StringRef partial_path,
471     const llvm::Twine
472         &prefix_path, // Anything that has been resolved already will be in here
473     const CompilerType &compiler_type, CompletionRequest &request) {
474 
475   // We are in a type parsing child members
476   const uint32_t num_bases = compiler_type.GetNumDirectBaseClasses();
477 
478   if (num_bases > 0) {
479     for (uint32_t i = 0; i < num_bases; ++i) {
480       CompilerType base_class_type =
481           compiler_type.GetDirectBaseClassAtIndex(i, nullptr);
482 
483       PrivateAutoCompleteMembers(frame, partial_member_name, partial_path,
484                                  prefix_path,
485                                  base_class_type.GetCanonicalType(), request);
486     }
487   }
488 
489   const uint32_t num_vbases = compiler_type.GetNumVirtualBaseClasses();
490 
491   if (num_vbases > 0) {
492     for (uint32_t i = 0; i < num_vbases; ++i) {
493       CompilerType vbase_class_type =
494           compiler_type.GetVirtualBaseClassAtIndex(i, nullptr);
495 
496       PrivateAutoCompleteMembers(frame, partial_member_name, partial_path,
497                                  prefix_path,
498                                  vbase_class_type.GetCanonicalType(), request);
499     }
500   }
501 
502   // We are in a type parsing child members
503   const uint32_t num_fields = compiler_type.GetNumFields();
504 
505   if (num_fields > 0) {
506     for (uint32_t i = 0; i < num_fields; ++i) {
507       std::string member_name;
508 
509       CompilerType member_compiler_type = compiler_type.GetFieldAtIndex(
510           i, member_name, nullptr, nullptr, nullptr);
511 
512       if (partial_member_name.empty() ||
513           llvm::StringRef(member_name).starts_with(partial_member_name)) {
514         if (member_name == partial_member_name) {
515           PrivateAutoComplete(
516               frame, partial_path,
517               prefix_path + member_name, // Anything that has been resolved
518                                          // already will be in here
519               member_compiler_type.GetCanonicalType(), request);
520         } else {
521           request.AddCompletion((prefix_path + member_name).str());
522         }
523       }
524     }
525   }
526 }
527 
528 static void PrivateAutoComplete(
529     StackFrame *frame, llvm::StringRef partial_path,
530     const llvm::Twine
531         &prefix_path, // Anything that has been resolved already will be in here
532     const CompilerType &compiler_type, CompletionRequest &request) {
533   //    printf ("\nPrivateAutoComplete()\n\tprefix_path = '%s'\n\tpartial_path =
534   //    '%s'\n", prefix_path.c_str(), partial_path.c_str());
535   std::string remaining_partial_path;
536 
537   const lldb::TypeClass type_class = compiler_type.GetTypeClass();
538   if (partial_path.empty()) {
539     if (compiler_type.IsValid()) {
540       switch (type_class) {
541       default:
542       case eTypeClassArray:
543       case eTypeClassBlockPointer:
544       case eTypeClassBuiltin:
545       case eTypeClassComplexFloat:
546       case eTypeClassComplexInteger:
547       case eTypeClassEnumeration:
548       case eTypeClassFunction:
549       case eTypeClassMemberPointer:
550       case eTypeClassReference:
551       case eTypeClassTypedef:
552       case eTypeClassVector: {
553         request.AddCompletion(prefix_path.str());
554       } break;
555 
556       case eTypeClassClass:
557       case eTypeClassStruct:
558       case eTypeClassUnion:
559         if (prefix_path.str().back() != '.')
560           request.AddCompletion((prefix_path + ".").str());
561         break;
562 
563       case eTypeClassObjCObject:
564       case eTypeClassObjCInterface:
565         break;
566       case eTypeClassObjCObjectPointer:
567       case eTypeClassPointer: {
568         bool omit_empty_base_classes = true;
569         if (compiler_type.GetNumChildren(omit_empty_base_classes, nullptr) > 0)
570           request.AddCompletion((prefix_path + "->").str());
571         else {
572           request.AddCompletion(prefix_path.str());
573         }
574       } break;
575       }
576     } else {
577       if (frame) {
578         const bool get_file_globals = true;
579 
580         VariableList *variable_list = frame->GetVariableList(get_file_globals,
581                                                              nullptr);
582 
583         if (variable_list) {
584           for (const VariableSP &var_sp : *variable_list)
585             request.AddCompletion(var_sp->GetName().AsCString());
586         }
587       }
588     }
589   } else {
590     const char ch = partial_path[0];
591     switch (ch) {
592     case '*':
593       if (prefix_path.str().empty()) {
594         PrivateAutoComplete(frame, partial_path.substr(1), "*", compiler_type,
595                             request);
596       }
597       break;
598 
599     case '&':
600       if (prefix_path.isTriviallyEmpty()) {
601         PrivateAutoComplete(frame, partial_path.substr(1), std::string("&"),
602                             compiler_type, request);
603       }
604       break;
605 
606     case '-':
607       if (partial_path.size() > 1 && partial_path[1] == '>' &&
608           !prefix_path.str().empty()) {
609         switch (type_class) {
610         case lldb::eTypeClassPointer: {
611           CompilerType pointee_type(compiler_type.GetPointeeType());
612           if (partial_path.size() > 2 && partial_path[2]) {
613             // If there is more after the "->", then search deeper
614             PrivateAutoComplete(frame, partial_path.substr(2),
615                                 prefix_path + "->",
616                                 pointee_type.GetCanonicalType(), request);
617           } else {
618             // Nothing after the "->", so list all members
619             PrivateAutoCompleteMembers(
620                 frame, std::string(), std::string(), prefix_path + "->",
621                 pointee_type.GetCanonicalType(), request);
622           }
623         } break;
624         default:
625           break;
626         }
627       }
628       break;
629 
630     case '.':
631       if (compiler_type.IsValid()) {
632         switch (type_class) {
633         case lldb::eTypeClassUnion:
634         case lldb::eTypeClassStruct:
635         case lldb::eTypeClassClass:
636           if (partial_path.size() > 1 && partial_path[1]) {
637             // If there is more after the ".", then search deeper
638             PrivateAutoComplete(frame, partial_path.substr(1),
639                                 prefix_path + ".", compiler_type, request);
640 
641           } else {
642             // Nothing after the ".", so list all members
643             PrivateAutoCompleteMembers(frame, std::string(), partial_path,
644                                        prefix_path + ".", compiler_type,
645                                        request);
646           }
647           break;
648         default:
649           break;
650         }
651       }
652       break;
653     default:
654       if (isalpha(ch) || ch == '_' || ch == '$') {
655         const size_t partial_path_len = partial_path.size();
656         size_t pos = 1;
657         while (pos < partial_path_len) {
658           const char curr_ch = partial_path[pos];
659           if (isalnum(curr_ch) || curr_ch == '_' || curr_ch == '$') {
660             ++pos;
661             continue;
662           }
663           break;
664         }
665 
666         std::string token(std::string(partial_path), 0, pos);
667         remaining_partial_path = std::string(partial_path.substr(pos));
668 
669         if (compiler_type.IsValid()) {
670           PrivateAutoCompleteMembers(frame, token, remaining_partial_path,
671                                      prefix_path, compiler_type, request);
672         } else if (frame) {
673           // We haven't found our variable yet
674           const bool get_file_globals = true;
675 
676           VariableList *variable_list =
677               frame->GetVariableList(get_file_globals, nullptr);
678 
679           if (!variable_list)
680             break;
681 
682           for (VariableSP var_sp : *variable_list) {
683 
684             if (!var_sp)
685               continue;
686 
687             llvm::StringRef variable_name = var_sp->GetName().GetStringRef();
688             if (variable_name.starts_with(token)) {
689               if (variable_name == token) {
690                 Type *variable_type = var_sp->GetType();
691                 if (variable_type) {
692                   CompilerType variable_compiler_type(
693                       variable_type->GetForwardCompilerType());
694                   PrivateAutoComplete(
695                       frame, remaining_partial_path,
696                       prefix_path + token, // Anything that has been resolved
697                                            // already will be in here
698                       variable_compiler_type.GetCanonicalType(), request);
699                 } else {
700                   request.AddCompletion((prefix_path + variable_name).str());
701                 }
702               } else if (remaining_partial_path.empty()) {
703                 request.AddCompletion((prefix_path + variable_name).str());
704               }
705             }
706           }
707         }
708       }
709       break;
710     }
711   }
712 }
713 
714 void Variable::AutoComplete(const ExecutionContext &exe_ctx,
715                             CompletionRequest &request) {
716   CompilerType compiler_type;
717 
718   PrivateAutoComplete(exe_ctx.GetFramePtr(), request.GetCursorArgumentPrefix(),
719                       "", compiler_type, request);
720 }
721