xref: /openbsd-src/gnu/llvm/lldb/source/Plugins/LanguageRuntime/ObjC/ObjCLanguageRuntime.cpp (revision f6aab3d83b51b91c24247ad2c2573574de475a82)
1dda28197Spatrick //===-- ObjCLanguageRuntime.cpp -------------------------------------------===//
2061da546Spatrick //
3061da546Spatrick // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4061da546Spatrick // See https://llvm.org/LICENSE.txt for license information.
5061da546Spatrick // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6061da546Spatrick //
7061da546Spatrick //===----------------------------------------------------------------------===//
8061da546Spatrick #include "clang/AST/Type.h"
9061da546Spatrick 
10061da546Spatrick #include "ObjCLanguageRuntime.h"
11061da546Spatrick 
12dda28197Spatrick #include "Plugins/TypeSystem/Clang/TypeSystemClang.h"
13061da546Spatrick #include "lldb/Core/MappedHash.h"
14061da546Spatrick #include "lldb/Core/Module.h"
15061da546Spatrick #include "lldb/Core/PluginManager.h"
16061da546Spatrick #include "lldb/Core/ValueObject.h"
17061da546Spatrick #include "lldb/Symbol/SymbolContext.h"
18061da546Spatrick #include "lldb/Symbol/SymbolFile.h"
19061da546Spatrick #include "lldb/Symbol/Type.h"
20061da546Spatrick #include "lldb/Symbol/TypeList.h"
21061da546Spatrick #include "lldb/Symbol/Variable.h"
22*f6aab3d8Srobert #include "lldb/Target/ABI.h"
23061da546Spatrick #include "lldb/Target/Target.h"
24*f6aab3d8Srobert #include "lldb/Utility/LLDBLog.h"
25061da546Spatrick #include "lldb/Utility/Log.h"
26061da546Spatrick #include "lldb/Utility/Timer.h"
27061da546Spatrick 
28061da546Spatrick #include "llvm/ADT/StringRef.h"
29061da546Spatrick #include "llvm/Support/DJB.h"
30*f6aab3d8Srobert #include <optional>
31061da546Spatrick 
32061da546Spatrick using namespace lldb;
33061da546Spatrick using namespace lldb_private;
34061da546Spatrick 
35061da546Spatrick char ObjCLanguageRuntime::ID = 0;
36061da546Spatrick 
37061da546Spatrick // Destructor
38be691f3bSpatrick ObjCLanguageRuntime::~ObjCLanguageRuntime() = default;
39061da546Spatrick 
ObjCLanguageRuntime(Process * process)40061da546Spatrick ObjCLanguageRuntime::ObjCLanguageRuntime(Process *process)
41*f6aab3d8Srobert     : LanguageRuntime(process), m_impl_cache(), m_impl_str_cache(),
42061da546Spatrick       m_has_new_literals_and_indexing(eLazyBoolCalculate),
43061da546Spatrick       m_isa_to_descriptor(), m_hash_to_isa_map(), m_type_size_cache(),
44061da546Spatrick       m_isa_to_descriptor_stop_id(UINT32_MAX), m_complete_class_cache(),
45061da546Spatrick       m_negative_complete_class_cache() {}
46061da546Spatrick 
IsAllowedRuntimeValue(ConstString name)47dda28197Spatrick bool ObjCLanguageRuntime::IsAllowedRuntimeValue(ConstString name) {
48061da546Spatrick   static ConstString g_self = ConstString("self");
49061da546Spatrick   static ConstString g_cmd = ConstString("_cmd");
50061da546Spatrick   return name == g_self || name == g_cmd;
51061da546Spatrick }
52061da546Spatrick 
AddClass(ObjCISA isa,const ClassDescriptorSP & descriptor_sp,const char * class_name)53061da546Spatrick bool ObjCLanguageRuntime::AddClass(ObjCISA isa,
54061da546Spatrick                                    const ClassDescriptorSP &descriptor_sp,
55061da546Spatrick                                    const char *class_name) {
56061da546Spatrick   if (isa != 0) {
57061da546Spatrick     m_isa_to_descriptor[isa] = descriptor_sp;
58061da546Spatrick     // class_name is assumed to be valid
59061da546Spatrick     m_hash_to_isa_map.insert(std::make_pair(llvm::djbHash(class_name), isa));
60061da546Spatrick     return true;
61061da546Spatrick   }
62061da546Spatrick   return false;
63061da546Spatrick }
64061da546Spatrick 
AddToMethodCache(lldb::addr_t class_addr,lldb::addr_t selector,lldb::addr_t impl_addr)65061da546Spatrick void ObjCLanguageRuntime::AddToMethodCache(lldb::addr_t class_addr,
66061da546Spatrick                                            lldb::addr_t selector,
67061da546Spatrick                                            lldb::addr_t impl_addr) {
68*f6aab3d8Srobert   Log *log = GetLog(LLDBLog::Step);
69061da546Spatrick   if (log) {
70061da546Spatrick     LLDB_LOGF(log,
71061da546Spatrick               "Caching: class 0x%" PRIx64 " selector 0x%" PRIx64
72061da546Spatrick               " implementation 0x%" PRIx64 ".",
73061da546Spatrick               class_addr, selector, impl_addr);
74061da546Spatrick   }
75061da546Spatrick   m_impl_cache.insert(std::pair<ClassAndSel, lldb::addr_t>(
76061da546Spatrick       ClassAndSel(class_addr, selector), impl_addr));
77061da546Spatrick }
78061da546Spatrick 
AddToMethodCache(lldb::addr_t class_addr,llvm::StringRef sel_str,lldb::addr_t impl_addr)79*f6aab3d8Srobert void ObjCLanguageRuntime::AddToMethodCache(lldb::addr_t class_addr,
80*f6aab3d8Srobert                                            llvm::StringRef sel_str,
81*f6aab3d8Srobert                                            lldb::addr_t impl_addr) {
82*f6aab3d8Srobert   Log *log = GetLog(LLDBLog::Step);
83*f6aab3d8Srobert 
84*f6aab3d8Srobert   LLDB_LOG(log, "Caching: class {0} selector {1} implementation {2}.",
85*f6aab3d8Srobert            class_addr, sel_str, impl_addr);
86*f6aab3d8Srobert 
87*f6aab3d8Srobert   m_impl_str_cache.insert(std::pair<ClassAndSelStr, lldb::addr_t>(
88*f6aab3d8Srobert       ClassAndSelStr(class_addr, sel_str), impl_addr));
89*f6aab3d8Srobert }
90*f6aab3d8Srobert 
LookupInMethodCache(lldb::addr_t class_addr,lldb::addr_t selector)91061da546Spatrick lldb::addr_t ObjCLanguageRuntime::LookupInMethodCache(lldb::addr_t class_addr,
92061da546Spatrick                                                       lldb::addr_t selector) {
93061da546Spatrick   MsgImplMap::iterator pos, end = m_impl_cache.end();
94061da546Spatrick   pos = m_impl_cache.find(ClassAndSel(class_addr, selector));
95061da546Spatrick   if (pos != end)
96061da546Spatrick     return (*pos).second;
97061da546Spatrick   return LLDB_INVALID_ADDRESS;
98061da546Spatrick }
99061da546Spatrick 
LookupInMethodCache(lldb::addr_t class_addr,llvm::StringRef sel_str)100*f6aab3d8Srobert lldb::addr_t ObjCLanguageRuntime::LookupInMethodCache(lldb::addr_t class_addr,
101*f6aab3d8Srobert                                                       llvm::StringRef sel_str) {
102*f6aab3d8Srobert   MsgImplStrMap::iterator pos, end = m_impl_str_cache.end();
103*f6aab3d8Srobert   pos = m_impl_str_cache.find(ClassAndSelStr(class_addr, sel_str));
104*f6aab3d8Srobert   if (pos != end)
105*f6aab3d8Srobert     return (*pos).second;
106*f6aab3d8Srobert   return LLDB_INVALID_ADDRESS;
107*f6aab3d8Srobert }
108*f6aab3d8Srobert 
109061da546Spatrick lldb::TypeSP
LookupInCompleteClassCache(ConstString & name)110061da546Spatrick ObjCLanguageRuntime::LookupInCompleteClassCache(ConstString &name) {
111061da546Spatrick   CompleteClassMap::iterator complete_class_iter =
112061da546Spatrick       m_complete_class_cache.find(name);
113061da546Spatrick 
114061da546Spatrick   if (complete_class_iter != m_complete_class_cache.end()) {
115061da546Spatrick     // Check the weak pointer to make sure the type hasn't been unloaded
116061da546Spatrick     TypeSP complete_type_sp(complete_class_iter->second.lock());
117061da546Spatrick 
118061da546Spatrick     if (complete_type_sp)
119061da546Spatrick       return complete_type_sp;
120061da546Spatrick     else
121061da546Spatrick       m_complete_class_cache.erase(name);
122061da546Spatrick   }
123061da546Spatrick 
124061da546Spatrick   if (m_negative_complete_class_cache.count(name) > 0)
125061da546Spatrick     return TypeSP();
126061da546Spatrick 
127061da546Spatrick   const ModuleList &modules = m_process->GetTarget().GetImages();
128061da546Spatrick 
129061da546Spatrick   SymbolContextList sc_list;
130061da546Spatrick   modules.FindSymbolsWithNameAndType(name, eSymbolTypeObjCClass, sc_list);
131061da546Spatrick   const size_t matching_symbols = sc_list.GetSize();
132061da546Spatrick 
133061da546Spatrick   if (matching_symbols) {
134061da546Spatrick     SymbolContext sc;
135061da546Spatrick 
136061da546Spatrick     sc_list.GetContextAtIndex(0, sc);
137061da546Spatrick 
138061da546Spatrick     ModuleSP module_sp(sc.module_sp);
139061da546Spatrick 
140061da546Spatrick     if (!module_sp)
141061da546Spatrick       return TypeSP();
142061da546Spatrick 
143061da546Spatrick     const bool exact_match = true;
144061da546Spatrick     const uint32_t max_matches = UINT32_MAX;
145061da546Spatrick     TypeList types;
146061da546Spatrick 
147061da546Spatrick     llvm::DenseSet<SymbolFile *> searched_symbol_files;
148061da546Spatrick     module_sp->FindTypes(name, exact_match, max_matches, searched_symbol_files,
149061da546Spatrick                          types);
150061da546Spatrick 
151061da546Spatrick     for (uint32_t i = 0; i < types.GetSize(); ++i) {
152061da546Spatrick       TypeSP type_sp(types.GetTypeAtIndex(i));
153061da546Spatrick 
154dda28197Spatrick       if (TypeSystemClang::IsObjCObjectOrInterfaceType(
155061da546Spatrick               type_sp->GetForwardCompilerType())) {
156dda28197Spatrick         if (TypePayloadClang(type_sp->GetPayload()).IsCompleteObjCClass()) {
157061da546Spatrick           m_complete_class_cache[name] = type_sp;
158061da546Spatrick           return type_sp;
159061da546Spatrick         }
160061da546Spatrick       }
161061da546Spatrick     }
162061da546Spatrick   }
163061da546Spatrick   m_negative_complete_class_cache.insert(name);
164061da546Spatrick   return TypeSP();
165061da546Spatrick }
166061da546Spatrick 
GetByteOffsetForIvar(CompilerType & parent_qual_type,const char * ivar_name)167061da546Spatrick size_t ObjCLanguageRuntime::GetByteOffsetForIvar(CompilerType &parent_qual_type,
168061da546Spatrick                                                  const char *ivar_name) {
169061da546Spatrick   return LLDB_INVALID_IVAR_OFFSET;
170061da546Spatrick }
171061da546Spatrick 
IsPointerValid(lldb::addr_t value,uint32_t ptr_size,bool allow_NULLs,bool allow_tagged,bool check_version_specific) const172061da546Spatrick bool ObjCLanguageRuntime::ClassDescriptor::IsPointerValid(
173061da546Spatrick     lldb::addr_t value, uint32_t ptr_size, bool allow_NULLs, bool allow_tagged,
174061da546Spatrick     bool check_version_specific) const {
175061da546Spatrick   if (!value)
176061da546Spatrick     return allow_NULLs;
177061da546Spatrick   if ((value % 2) == 1 && allow_tagged)
178061da546Spatrick     return true;
179061da546Spatrick   if ((value % ptr_size) == 0)
180061da546Spatrick     return (check_version_specific ? CheckPointer(value, ptr_size) : true);
181061da546Spatrick   else
182061da546Spatrick     return false;
183061da546Spatrick }
184061da546Spatrick 
185061da546Spatrick ObjCLanguageRuntime::ObjCISA
GetISA(ConstString name)186061da546Spatrick ObjCLanguageRuntime::GetISA(ConstString name) {
187061da546Spatrick   ISAToDescriptorIterator pos = GetDescriptorIterator(name);
188061da546Spatrick   if (pos != m_isa_to_descriptor.end())
189061da546Spatrick     return pos->first;
190061da546Spatrick   return 0;
191061da546Spatrick }
192061da546Spatrick 
193061da546Spatrick ObjCLanguageRuntime::ISAToDescriptorIterator
GetDescriptorIterator(ConstString name)194061da546Spatrick ObjCLanguageRuntime::GetDescriptorIterator(ConstString name) {
195061da546Spatrick   ISAToDescriptorIterator end = m_isa_to_descriptor.end();
196061da546Spatrick 
197061da546Spatrick   if (name) {
198061da546Spatrick     UpdateISAToDescriptorMap();
199061da546Spatrick     if (m_hash_to_isa_map.empty()) {
200061da546Spatrick       // No name hashes were provided, we need to just linearly power through
201061da546Spatrick       // the names and find a match
202061da546Spatrick       for (ISAToDescriptorIterator pos = m_isa_to_descriptor.begin();
203061da546Spatrick            pos != end; ++pos) {
204061da546Spatrick         if (pos->second->GetClassName() == name)
205061da546Spatrick           return pos;
206061da546Spatrick       }
207061da546Spatrick     } else {
208061da546Spatrick       // Name hashes were provided, so use them to efficiently lookup name to
209061da546Spatrick       // isa/descriptor
210061da546Spatrick       const uint32_t name_hash = llvm::djbHash(name.GetStringRef());
211061da546Spatrick       std::pair<HashToISAIterator, HashToISAIterator> range =
212061da546Spatrick           m_hash_to_isa_map.equal_range(name_hash);
213061da546Spatrick       for (HashToISAIterator range_pos = range.first; range_pos != range.second;
214061da546Spatrick            ++range_pos) {
215061da546Spatrick         ISAToDescriptorIterator pos =
216061da546Spatrick             m_isa_to_descriptor.find(range_pos->second);
217061da546Spatrick         if (pos != m_isa_to_descriptor.end()) {
218061da546Spatrick           if (pos->second->GetClassName() == name)
219061da546Spatrick             return pos;
220061da546Spatrick         }
221061da546Spatrick       }
222061da546Spatrick     }
223061da546Spatrick   }
224061da546Spatrick   return end;
225061da546Spatrick }
226061da546Spatrick 
227061da546Spatrick std::pair<ObjCLanguageRuntime::ISAToDescriptorIterator,
228061da546Spatrick           ObjCLanguageRuntime::ISAToDescriptorIterator>
GetDescriptorIteratorPair(bool update_if_needed)229061da546Spatrick ObjCLanguageRuntime::GetDescriptorIteratorPair(bool update_if_needed) {
230061da546Spatrick   if (update_if_needed)
231061da546Spatrick     UpdateISAToDescriptorMapIfNeeded();
232061da546Spatrick 
233061da546Spatrick   return std::pair<ObjCLanguageRuntime::ISAToDescriptorIterator,
234061da546Spatrick                    ObjCLanguageRuntime::ISAToDescriptorIterator>(
235061da546Spatrick       m_isa_to_descriptor.begin(), m_isa_to_descriptor.end());
236061da546Spatrick }
237061da546Spatrick 
238061da546Spatrick ObjCLanguageRuntime::ObjCISA
GetParentClass(ObjCLanguageRuntime::ObjCISA isa)239061da546Spatrick ObjCLanguageRuntime::GetParentClass(ObjCLanguageRuntime::ObjCISA isa) {
240061da546Spatrick   ClassDescriptorSP objc_class_sp(GetClassDescriptorFromISA(isa));
241061da546Spatrick   if (objc_class_sp) {
242061da546Spatrick     ClassDescriptorSP objc_super_class_sp(objc_class_sp->GetSuperclass());
243061da546Spatrick     if (objc_super_class_sp)
244061da546Spatrick       return objc_super_class_sp->GetISA();
245061da546Spatrick   }
246061da546Spatrick   return 0;
247061da546Spatrick }
248061da546Spatrick 
249061da546Spatrick ObjCLanguageRuntime::ClassDescriptorSP
GetClassDescriptorFromClassName(ConstString class_name)250061da546Spatrick ObjCLanguageRuntime::GetClassDescriptorFromClassName(
251061da546Spatrick     ConstString class_name) {
252061da546Spatrick   ISAToDescriptorIterator pos = GetDescriptorIterator(class_name);
253061da546Spatrick   if (pos != m_isa_to_descriptor.end())
254061da546Spatrick     return pos->second;
255061da546Spatrick   return ClassDescriptorSP();
256061da546Spatrick }
257061da546Spatrick 
258061da546Spatrick ObjCLanguageRuntime::ClassDescriptorSP
GetClassDescriptor(ValueObject & valobj)259061da546Spatrick ObjCLanguageRuntime::GetClassDescriptor(ValueObject &valobj) {
260061da546Spatrick   ClassDescriptorSP objc_class_sp;
261061da546Spatrick   // if we get an invalid VO (which might still happen when playing around with
262061da546Spatrick   // pointers returned by the expression parser, don't consider this a valid
263061da546Spatrick   // ObjC object)
264061da546Spatrick   if (valobj.GetCompilerType().IsValid()) {
265061da546Spatrick     addr_t isa_pointer = valobj.GetPointerValue();
266061da546Spatrick     if (isa_pointer != LLDB_INVALID_ADDRESS) {
267061da546Spatrick       ExecutionContext exe_ctx(valobj.GetExecutionContextRef());
268061da546Spatrick 
269061da546Spatrick       Process *process = exe_ctx.GetProcessPtr();
270061da546Spatrick       if (process) {
271061da546Spatrick         Status error;
272061da546Spatrick         ObjCISA isa = process->ReadPointerFromMemory(isa_pointer, error);
273061da546Spatrick         if (isa != LLDB_INVALID_ADDRESS)
274061da546Spatrick           objc_class_sp = GetClassDescriptorFromISA(isa);
275061da546Spatrick       }
276061da546Spatrick     }
277061da546Spatrick   }
278061da546Spatrick   return objc_class_sp;
279061da546Spatrick }
280061da546Spatrick 
281061da546Spatrick ObjCLanguageRuntime::ClassDescriptorSP
GetNonKVOClassDescriptor(ValueObject & valobj)282061da546Spatrick ObjCLanguageRuntime::GetNonKVOClassDescriptor(ValueObject &valobj) {
283061da546Spatrick   ObjCLanguageRuntime::ClassDescriptorSP objc_class_sp(
284061da546Spatrick       GetClassDescriptor(valobj));
285061da546Spatrick   if (objc_class_sp) {
286061da546Spatrick     if (!objc_class_sp->IsKVO())
287061da546Spatrick       return objc_class_sp;
288061da546Spatrick 
289061da546Spatrick     ClassDescriptorSP non_kvo_objc_class_sp(objc_class_sp->GetSuperclass());
290061da546Spatrick     if (non_kvo_objc_class_sp && non_kvo_objc_class_sp->IsValid())
291061da546Spatrick       return non_kvo_objc_class_sp;
292061da546Spatrick   }
293061da546Spatrick   return ClassDescriptorSP();
294061da546Spatrick }
295061da546Spatrick 
296061da546Spatrick ObjCLanguageRuntime::ClassDescriptorSP
GetClassDescriptorFromISA(ObjCISA isa)297061da546Spatrick ObjCLanguageRuntime::GetClassDescriptorFromISA(ObjCISA isa) {
298061da546Spatrick   if (isa) {
299061da546Spatrick     UpdateISAToDescriptorMap();
300*f6aab3d8Srobert 
301061da546Spatrick     ObjCLanguageRuntime::ISAToDescriptorIterator pos =
302061da546Spatrick         m_isa_to_descriptor.find(isa);
303061da546Spatrick     if (pos != m_isa_to_descriptor.end())
304061da546Spatrick       return pos->second;
305*f6aab3d8Srobert 
306*f6aab3d8Srobert     if (ABISP abi_sp = m_process->GetABI()) {
307*f6aab3d8Srobert       pos = m_isa_to_descriptor.find(abi_sp->FixCodeAddress(isa));
308*f6aab3d8Srobert       if (pos != m_isa_to_descriptor.end())
309*f6aab3d8Srobert         return pos->second;
310*f6aab3d8Srobert     }
311061da546Spatrick   }
312061da546Spatrick   return ClassDescriptorSP();
313061da546Spatrick }
314061da546Spatrick 
315061da546Spatrick ObjCLanguageRuntime::ClassDescriptorSP
GetNonKVOClassDescriptor(ObjCISA isa)316061da546Spatrick ObjCLanguageRuntime::GetNonKVOClassDescriptor(ObjCISA isa) {
317061da546Spatrick   if (isa) {
318061da546Spatrick     ClassDescriptorSP objc_class_sp = GetClassDescriptorFromISA(isa);
319061da546Spatrick     if (objc_class_sp && objc_class_sp->IsValid()) {
320061da546Spatrick       if (!objc_class_sp->IsKVO())
321061da546Spatrick         return objc_class_sp;
322061da546Spatrick 
323061da546Spatrick       ClassDescriptorSP non_kvo_objc_class_sp(objc_class_sp->GetSuperclass());
324061da546Spatrick       if (non_kvo_objc_class_sp && non_kvo_objc_class_sp->IsValid())
325061da546Spatrick         return non_kvo_objc_class_sp;
326061da546Spatrick     }
327061da546Spatrick   }
328061da546Spatrick   return ClassDescriptorSP();
329061da546Spatrick }
330061da546Spatrick 
331061da546Spatrick CompilerType
RealizeType(const char * name,bool for_expression)332061da546Spatrick ObjCLanguageRuntime::EncodingToType::RealizeType(const char *name,
333061da546Spatrick                                                  bool for_expression) {
334*f6aab3d8Srobert   if (m_scratch_ast_ctx_sp)
335*f6aab3d8Srobert     return RealizeType(*m_scratch_ast_ctx_sp, name, for_expression);
336061da546Spatrick   return CompilerType();
337061da546Spatrick }
338061da546Spatrick 
339be691f3bSpatrick ObjCLanguageRuntime::EncodingToType::~EncodingToType() = default;
340061da546Spatrick 
GetEncodingToType()341061da546Spatrick ObjCLanguageRuntime::EncodingToTypeSP ObjCLanguageRuntime::GetEncodingToType() {
342061da546Spatrick   return nullptr;
343061da546Spatrick }
344061da546Spatrick 
GetTypeBitSize(const CompilerType & compiler_type,uint64_t & size)345061da546Spatrick bool ObjCLanguageRuntime::GetTypeBitSize(const CompilerType &compiler_type,
346061da546Spatrick                                          uint64_t &size) {
347061da546Spatrick   void *opaque_ptr = compiler_type.GetOpaqueQualType();
348061da546Spatrick   size = m_type_size_cache.Lookup(opaque_ptr);
349061da546Spatrick   // an ObjC object will at least have an ISA, so 0 is definitely not OK
350061da546Spatrick   if (size > 0)
351061da546Spatrick     return true;
352061da546Spatrick 
353061da546Spatrick   ClassDescriptorSP class_descriptor_sp =
354061da546Spatrick       GetClassDescriptorFromClassName(compiler_type.GetTypeName());
355061da546Spatrick   if (!class_descriptor_sp)
356061da546Spatrick     return false;
357061da546Spatrick 
358061da546Spatrick   int32_t max_offset = INT32_MIN;
359061da546Spatrick   uint64_t sizeof_max = 0;
360061da546Spatrick   bool found = false;
361061da546Spatrick 
362061da546Spatrick   for (size_t idx = 0; idx < class_descriptor_sp->GetNumIVars(); idx++) {
363061da546Spatrick     const auto &ivar = class_descriptor_sp->GetIVarAtIndex(idx);
364061da546Spatrick     int32_t cur_offset = ivar.m_offset;
365061da546Spatrick     if (cur_offset > max_offset) {
366061da546Spatrick       max_offset = cur_offset;
367061da546Spatrick       sizeof_max = ivar.m_size;
368061da546Spatrick       found = true;
369061da546Spatrick     }
370061da546Spatrick   }
371061da546Spatrick 
372061da546Spatrick   size = 8 * (max_offset + sizeof_max);
373061da546Spatrick   if (found)
374061da546Spatrick     m_type_size_cache.Insert(opaque_ptr, size);
375061da546Spatrick 
376061da546Spatrick   return found;
377061da546Spatrick }
378061da546Spatrick 
379061da546Spatrick lldb::BreakpointPreconditionSP
GetBreakpointExceptionPrecondition(LanguageType language,bool throw_bp)380061da546Spatrick ObjCLanguageRuntime::GetBreakpointExceptionPrecondition(LanguageType language,
381061da546Spatrick                                                         bool throw_bp) {
382061da546Spatrick   if (language != eLanguageTypeObjC)
383061da546Spatrick     return lldb::BreakpointPreconditionSP();
384061da546Spatrick   if (!throw_bp)
385061da546Spatrick     return lldb::BreakpointPreconditionSP();
386061da546Spatrick   BreakpointPreconditionSP precondition_sp(
387061da546Spatrick       new ObjCLanguageRuntime::ObjCExceptionPrecondition());
388061da546Spatrick   return precondition_sp;
389061da546Spatrick }
390061da546Spatrick 
391061da546Spatrick // Exception breakpoint Precondition class for ObjC:
AddClassName(const char * class_name)392061da546Spatrick void ObjCLanguageRuntime::ObjCExceptionPrecondition::AddClassName(
393061da546Spatrick     const char *class_name) {
394061da546Spatrick   m_class_names.insert(class_name);
395061da546Spatrick }
396061da546Spatrick 
397be691f3bSpatrick ObjCLanguageRuntime::ObjCExceptionPrecondition::ObjCExceptionPrecondition() =
398be691f3bSpatrick     default;
399061da546Spatrick 
EvaluatePrecondition(StoppointCallbackContext & context)400061da546Spatrick bool ObjCLanguageRuntime::ObjCExceptionPrecondition::EvaluatePrecondition(
401061da546Spatrick     StoppointCallbackContext &context) {
402061da546Spatrick   return true;
403061da546Spatrick }
404061da546Spatrick 
GetDescription(Stream & stream,lldb::DescriptionLevel level)405061da546Spatrick void ObjCLanguageRuntime::ObjCExceptionPrecondition::GetDescription(
406061da546Spatrick     Stream &stream, lldb::DescriptionLevel level) {}
407061da546Spatrick 
ConfigurePrecondition(Args & args)408061da546Spatrick Status ObjCLanguageRuntime::ObjCExceptionPrecondition::ConfigurePrecondition(
409061da546Spatrick     Args &args) {
410061da546Spatrick   Status error;
411061da546Spatrick   if (args.GetArgumentCount() > 0)
412061da546Spatrick     error.SetErrorString(
413061da546Spatrick         "The ObjC Exception breakpoint doesn't support extra options.");
414061da546Spatrick   return error;
415061da546Spatrick }
416061da546Spatrick 
417*f6aab3d8Srobert std::optional<CompilerType>
GetRuntimeType(CompilerType base_type)418061da546Spatrick ObjCLanguageRuntime::GetRuntimeType(CompilerType base_type) {
419061da546Spatrick   CompilerType class_type;
420061da546Spatrick   bool is_pointer_type = false;
421061da546Spatrick 
422dda28197Spatrick   if (TypeSystemClang::IsObjCObjectPointerType(base_type, &class_type))
423061da546Spatrick     is_pointer_type = true;
424dda28197Spatrick   else if (TypeSystemClang::IsObjCObjectOrInterfaceType(base_type))
425061da546Spatrick     class_type = base_type;
426061da546Spatrick   else
427*f6aab3d8Srobert     return std::nullopt;
428061da546Spatrick 
429061da546Spatrick   if (!class_type)
430*f6aab3d8Srobert     return std::nullopt;
431061da546Spatrick 
432dda28197Spatrick   ConstString class_name(class_type.GetTypeName());
433061da546Spatrick   if (!class_name)
434*f6aab3d8Srobert     return std::nullopt;
435061da546Spatrick 
436061da546Spatrick   TypeSP complete_objc_class_type_sp = LookupInCompleteClassCache(class_name);
437061da546Spatrick   if (!complete_objc_class_type_sp)
438*f6aab3d8Srobert     return std::nullopt;
439061da546Spatrick 
440061da546Spatrick   CompilerType complete_class(
441061da546Spatrick       complete_objc_class_type_sp->GetFullCompilerType());
442061da546Spatrick   if (complete_class.GetCompleteType()) {
443061da546Spatrick     if (is_pointer_type)
444061da546Spatrick       return complete_class.GetPointerType();
445061da546Spatrick     else
446061da546Spatrick       return complete_class;
447061da546Spatrick   }
448061da546Spatrick 
449*f6aab3d8Srobert   return std::nullopt;
450061da546Spatrick }
451