forked from OSchip/llvm-project
602 lines
19 KiB
C++
602 lines
19 KiB
C++
//===-- ObjCLanguageRuntime.cpp ---------------------------------*- C++ -*-===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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#include "clang/AST/Type.h"
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#include "lldb/Core/Log.h"
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#include "lldb/Core/MappedHash.h"
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#include "lldb/Core/Module.h"
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#include "lldb/Core/PluginManager.h"
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#include "lldb/Core/Timer.h"
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#include "lldb/Core/ValueObject.h"
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#include "lldb/Symbol/ClangASTContext.h"
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#include "lldb/Symbol/Type.h"
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#include "lldb/Symbol/TypeList.h"
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#include "lldb/Target/ObjCLanguageRuntime.h"
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#include "lldb/Target/Target.h"
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#include "llvm/ADT/StringRef.h"
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using namespace lldb;
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using namespace lldb_private;
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//----------------------------------------------------------------------
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// Destructor
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//----------------------------------------------------------------------
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ObjCLanguageRuntime::~ObjCLanguageRuntime()
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{
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}
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ObjCLanguageRuntime::ObjCLanguageRuntime (Process *process) :
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LanguageRuntime (process),
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m_has_new_literals_and_indexing (eLazyBoolCalculate),
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m_isa_to_descriptor(),
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m_isa_to_descriptor_stop_id (UINT32_MAX)
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{
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}
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bool
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ObjCLanguageRuntime::AddClass (ObjCISA isa, const ClassDescriptorSP &descriptor_sp, const char *class_name)
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{
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if (isa != 0)
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{
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m_isa_to_descriptor[isa] = descriptor_sp;
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// class_name is assumed to be valid
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m_hash_to_isa_map.insert(std::make_pair(MappedHash::HashStringUsingDJB(class_name), isa));
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return true;
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}
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return false;
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}
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void
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ObjCLanguageRuntime::AddToMethodCache (lldb::addr_t class_addr, lldb::addr_t selector, lldb::addr_t impl_addr)
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{
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LogSP log(lldb_private::GetLogIfAllCategoriesSet (LIBLLDB_LOG_STEP));
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if (log)
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{
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log->Printf ("Caching: class 0x%" PRIx64 " selector 0x%" PRIx64 " implementation 0x%" PRIx64 ".", class_addr, selector, impl_addr);
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}
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m_impl_cache.insert (std::pair<ClassAndSel,lldb::addr_t> (ClassAndSel(class_addr, selector), impl_addr));
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}
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lldb::addr_t
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ObjCLanguageRuntime::LookupInMethodCache (lldb::addr_t class_addr, lldb::addr_t selector)
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{
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MsgImplMap::iterator pos, end = m_impl_cache.end();
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pos = m_impl_cache.find (ClassAndSel(class_addr, selector));
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if (pos != end)
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return (*pos).second;
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return LLDB_INVALID_ADDRESS;
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}
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lldb::TypeSP
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ObjCLanguageRuntime::LookupInCompleteClassCache (ConstString &name)
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{
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CompleteClassMap::iterator complete_class_iter = m_complete_class_cache.find(name);
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if (complete_class_iter != m_complete_class_cache.end())
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{
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// Check the weak pointer to make sure the type hasn't been unloaded
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TypeSP complete_type_sp (complete_class_iter->second.lock());
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if (complete_type_sp)
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return complete_type_sp;
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else
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m_complete_class_cache.erase(name);
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}
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const ModuleList &modules = m_process->GetTarget().GetImages();
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SymbolContextList sc_list;
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const size_t matching_symbols = modules.FindSymbolsWithNameAndType (name,
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eSymbolTypeObjCClass,
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sc_list);
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if (matching_symbols)
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{
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SymbolContext sc;
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sc_list.GetContextAtIndex(0, sc);
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ModuleSP module_sp(sc.module_sp);
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if (!module_sp)
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return TypeSP();
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const SymbolContext null_sc;
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const bool exact_match = true;
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const uint32_t max_matches = UINT32_MAX;
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TypeList types;
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const uint32_t num_types = module_sp->FindTypes (null_sc,
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name,
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exact_match,
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max_matches,
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types);
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if (num_types)
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{
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uint32_t i;
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for (i = 0; i < num_types; ++i)
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{
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TypeSP type_sp (types.GetTypeAtIndex(i));
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if (ClangASTContext::IsObjCClassType(type_sp->GetClangForwardType()))
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{
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if (type_sp->IsCompleteObjCClass())
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{
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m_complete_class_cache[name] = type_sp;
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return type_sp;
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}
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}
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}
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}
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}
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return TypeSP();
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}
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size_t
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ObjCLanguageRuntime::GetByteOffsetForIvar (ClangASTType &parent_qual_type, const char *ivar_name)
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{
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return LLDB_INVALID_IVAR_OFFSET;
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}
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void
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ObjCLanguageRuntime::MethodName::Clear()
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{
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m_full.Clear();
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m_class.Clear();
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m_category.Clear();
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m_selector.Clear();
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m_type = eTypeUnspecified;
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m_category_is_valid = false;
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}
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//bool
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//ObjCLanguageRuntime::MethodName::SetName (const char *name, bool strict)
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//{
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// Clear();
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// if (name && name[0])
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// {
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// // If "strict" is true. then the method must be specified with a
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// // '+' or '-' at the beginning. If "strict" is false, then the '+'
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// // or '-' can be omitted
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// bool valid_prefix = false;
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//
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// if (name[0] == '+' || name[0] == '-')
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// {
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// valid_prefix = name[1] == '[';
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// }
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// else if (!strict)
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// {
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// // "strict" is false, the name just needs to start with '['
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// valid_prefix = name[0] == '[';
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// }
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//
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// if (valid_prefix)
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// {
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// static RegularExpression g_regex("^([-+]?)\\[([A-Za-z_][A-Za-z_0-9]*)(\\([A-Za-z_][A-Za-z_0-9]*\\))? ([A-Za-z_][A-Za-z_0-9:]*)\\]$");
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// llvm::StringRef matches[4];
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// // Since we are using a global regular expression, we must use the threadsafe version of execute
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// if (g_regex.ExecuteThreadSafe(name, matches, 4))
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// {
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// m_full.SetCString(name);
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// if (matches[0].empty())
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// m_type = eTypeUnspecified;
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// else if (matches[0][0] == '+')
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// m_type = eTypeClassMethod;
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// else
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// m_type = eTypeInstanceMethod;
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// m_class.SetString(matches[1]);
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// m_selector.SetString(matches[3]);
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// if (!matches[2].empty())
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// m_category.SetString(matches[2]);
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// }
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// }
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// }
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// return IsValid(strict);
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//}
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bool
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ObjCLanguageRuntime::MethodName::SetName (const char *name, bool strict)
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{
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Clear();
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if (name && name[0])
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{
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// If "strict" is true. then the method must be specified with a
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// '+' or '-' at the beginning. If "strict" is false, then the '+'
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// or '-' can be omitted
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bool valid_prefix = false;
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if (name[0] == '+' || name[0] == '-')
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{
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valid_prefix = name[1] == '[';
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if (name[0] == '+')
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m_type = eTypeClassMethod;
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else
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m_type = eTypeInstanceMethod;
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}
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else if (!strict)
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{
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// "strict" is false, the name just needs to start with '['
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valid_prefix = name[0] == '[';
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}
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if (valid_prefix)
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{
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int name_len = strlen (name);
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// Objective C methods must have at least:
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// "-[" or "+[" prefix
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// One character for a class name
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// One character for the space between the class name
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// One character for the method name
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// "]" suffix
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if (name_len >= (5 + (strict ? 1 : 0)) && name[name_len - 1] == ']')
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{
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m_full.SetCStringWithLength(name, name_len);
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}
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}
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}
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return IsValid(strict);
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}
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const ConstString &
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ObjCLanguageRuntime::MethodName::GetClassName ()
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{
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if (!m_class)
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{
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if (IsValid(false))
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{
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const char *full = m_full.GetCString();
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const char *class_start = (full[0] == '[' ? full + 1 : full + 2);
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const char *paren_pos = strchr (class_start, '(');
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if (paren_pos)
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{
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m_class.SetCStringWithLength (class_start, paren_pos - class_start);
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}
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else
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{
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// No '(' was found in the full name, we can definitively say
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// that our category was valid (and empty).
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m_category_is_valid = true;
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const char *space_pos = strchr (full, ' ');
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if (space_pos)
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{
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m_class.SetCStringWithLength (class_start, space_pos - class_start);
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if (!m_class_category)
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{
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// No category in name, so we can also fill in the m_class_category
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m_class_category = m_class;
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}
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}
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}
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}
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}
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return m_class;
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}
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const ConstString &
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ObjCLanguageRuntime::MethodName::GetClassNameWithCategory ()
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{
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if (!m_class_category)
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{
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if (IsValid(false))
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{
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const char *full = m_full.GetCString();
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const char *class_start = (full[0] == '[' ? full + 1 : full + 2);
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const char *space_pos = strchr (full, ' ');
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if (space_pos)
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{
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m_class_category.SetCStringWithLength (class_start, space_pos - class_start);
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// If m_class hasn't been filled in and the class with category doesn't
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// contain a '(', then we can also fill in the m_class
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if (!m_class && strchr (m_class_category.GetCString(), '(') == NULL)
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{
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m_class = m_class_category;
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// No '(' was found in the full name, we can definitively say
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// that our category was valid (and empty).
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m_category_is_valid = true;
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}
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}
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}
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}
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return m_class_category;
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}
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const ConstString &
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ObjCLanguageRuntime::MethodName::GetSelector ()
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{
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if (!m_selector)
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{
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if (IsValid(false))
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{
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const char *full = m_full.GetCString();
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const char *space_pos = strchr (full, ' ');
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if (space_pos)
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{
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++space_pos; // skip the space
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m_selector.SetCStringWithLength (space_pos, m_full.GetLength() - (space_pos - full) - 1);
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}
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}
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}
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return m_selector;
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}
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const ConstString &
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ObjCLanguageRuntime::MethodName::GetCategory ()
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{
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if (!m_category_is_valid && !m_category)
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{
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if (IsValid(false))
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{
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m_category_is_valid = true;
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const char *full = m_full.GetCString();
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const char *class_start = (full[0] == '[' ? full + 1 : full + 2);
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const char *open_paren_pos = strchr (class_start, '(');
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if (open_paren_pos)
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{
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++open_paren_pos; // Skip the open paren
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const char *close_paren_pos = strchr (open_paren_pos, ')');
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if (close_paren_pos)
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m_category.SetCStringWithLength (open_paren_pos, close_paren_pos - open_paren_pos);
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}
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}
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}
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return m_category;
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}
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ConstString
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ObjCLanguageRuntime::MethodName::GetFullNameWithoutCategory (bool empty_if_no_category)
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{
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if (IsValid(false))
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{
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if (HasCategory())
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{
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StreamString strm;
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if (m_type == eTypeClassMethod)
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strm.PutChar('+');
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else if (m_type == eTypeInstanceMethod)
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strm.PutChar('-');
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strm.Printf("[%s %s]", GetClassName().GetCString(), GetSelector().GetCString());
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return ConstString(strm.GetString().c_str());
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}
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if (!empty_if_no_category)
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{
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// Just return the full name since it doesn't have a category
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return GetFullName();
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}
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}
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return ConstString();
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}
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size_t
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ObjCLanguageRuntime::MethodName::GetFullNames (std::vector<ConstString> &names, bool append)
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{
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if (!append)
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names.clear();
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if (IsValid(false))
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{
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StreamString strm;
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const bool is_class_method = m_type == eTypeClassMethod;
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const bool is_instance_method = m_type == eTypeInstanceMethod;
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const ConstString &category = GetCategory();
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if (is_class_method || is_instance_method)
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{
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names.push_back (m_full);
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if (category)
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{
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strm.Printf("%c[%s %s]",
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is_class_method ? '+' : '-',
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GetClassName().GetCString(),
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GetSelector().GetCString());
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names.push_back(ConstString(strm.GetString().c_str()));
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}
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}
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else
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{
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const ConstString &class_name = GetClassName();
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const ConstString &selector = GetSelector();
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strm.Printf("+[%s %s]", class_name.GetCString(), selector.GetCString());
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names.push_back(ConstString(strm.GetString().c_str()));
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strm.Clear();
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strm.Printf("-[%s %s]", class_name.GetCString(), selector.GetCString());
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names.push_back(ConstString(strm.GetString().c_str()));
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strm.Clear();
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if (category)
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{
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strm.Printf("+[%s(%s) %s]", class_name.GetCString(), category.GetCString(), selector.GetCString());
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names.push_back(ConstString(strm.GetString().c_str()));
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strm.Clear();
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strm.Printf("-[%s(%s) %s]", class_name.GetCString(), category.GetCString(), selector.GetCString());
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names.push_back(ConstString(strm.GetString().c_str()));
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}
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}
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}
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return names.size();
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}
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bool
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ObjCLanguageRuntime::ClassDescriptor::IsPointerValid (lldb::addr_t value,
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uint32_t ptr_size,
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bool allow_NULLs,
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bool allow_tagged,
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bool check_version_specific) const
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{
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if (!value)
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return allow_NULLs;
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if ( (value % 2) == 1 && allow_tagged)
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return true;
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if ((value % ptr_size) == 0)
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return (check_version_specific ? CheckPointer(value,ptr_size) : true);
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else
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return false;
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}
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ObjCLanguageRuntime::ObjCISA
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ObjCLanguageRuntime::GetISA(const ConstString &name)
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{
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ISAToDescriptorIterator pos = GetDescriptorIterator (name);
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if (pos != m_isa_to_descriptor.end())
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return pos->first;
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return 0;
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}
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ObjCLanguageRuntime::ISAToDescriptorIterator
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ObjCLanguageRuntime::GetDescriptorIterator (const ConstString &name)
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{
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ISAToDescriptorIterator end = m_isa_to_descriptor.end();
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if (name)
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{
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UpdateISAToDescriptorMap();
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if (m_hash_to_isa_map.empty())
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{
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// No name hashes were provided, we need to just linearly power through the
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// names and find a match
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for (ISAToDescriptorIterator pos = m_isa_to_descriptor.begin(); pos != end; ++pos)
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{
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if (pos->second->GetClassName() == name)
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return pos;
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}
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}
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else
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{
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// Name hashes were provided, so use them to efficiently lookup name to isa/descriptor
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const uint32_t name_hash = MappedHash::HashStringUsingDJB (name.GetCString());
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std::pair <HashToISAIterator, HashToISAIterator> range = m_hash_to_isa_map.equal_range(name_hash);
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for (HashToISAIterator range_pos = range.first; range_pos != range.second; ++range_pos)
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{
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ISAToDescriptorIterator pos = m_isa_to_descriptor.find (range_pos->second);
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if (pos != m_isa_to_descriptor.end())
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{
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if (pos->second->GetClassName() == name)
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return pos;
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}
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}
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}
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}
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return end;
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}
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ObjCLanguageRuntime::ObjCISA
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ObjCLanguageRuntime::GetParentClass(ObjCLanguageRuntime::ObjCISA isa)
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{
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ClassDescriptorSP objc_class_sp (GetClassDescriptor(isa));
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if (objc_class_sp)
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{
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ClassDescriptorSP objc_super_class_sp (objc_class_sp->GetSuperclass());
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if (objc_super_class_sp)
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return objc_super_class_sp->GetISA();
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}
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return 0;
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}
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ConstString
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ObjCLanguageRuntime::GetActualTypeName(ObjCLanguageRuntime::ObjCISA isa)
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{
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ClassDescriptorSP objc_class_sp (GetNonKVOClassDescriptor(isa));
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if (objc_class_sp)
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return objc_class_sp->GetClassName();
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return ConstString();
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}
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ObjCLanguageRuntime::ClassDescriptorSP
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ObjCLanguageRuntime::GetClassDescriptor (const ConstString &class_name)
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{
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ISAToDescriptorIterator pos = GetDescriptorIterator (class_name);
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if (pos != m_isa_to_descriptor.end())
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return pos->second;
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return ClassDescriptorSP();
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}
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ObjCLanguageRuntime::ClassDescriptorSP
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ObjCLanguageRuntime::GetClassDescriptor (ValueObject& valobj)
|
|
{
|
|
ClassDescriptorSP objc_class_sp;
|
|
// if we get an invalid VO (which might still happen when playing around
|
|
// with pointers returned by the expression parser, don't consider this
|
|
// a valid ObjC object)
|
|
if (valobj.GetValue().GetContextType() != Value::eContextTypeInvalid)
|
|
{
|
|
addr_t isa_pointer = valobj.GetPointerValue();
|
|
if (isa_pointer != LLDB_INVALID_ADDRESS)
|
|
{
|
|
ExecutionContext exe_ctx (valobj.GetExecutionContextRef());
|
|
|
|
Process *process = exe_ctx.GetProcessPtr();
|
|
if (process)
|
|
{
|
|
Error error;
|
|
ObjCISA isa = process->ReadPointerFromMemory(isa_pointer, error);
|
|
if (isa != LLDB_INVALID_ADDRESS)
|
|
objc_class_sp = GetClassDescriptor (isa);
|
|
}
|
|
}
|
|
}
|
|
return objc_class_sp;
|
|
}
|
|
|
|
ObjCLanguageRuntime::ClassDescriptorSP
|
|
ObjCLanguageRuntime::GetNonKVOClassDescriptor (ValueObject& valobj)
|
|
{
|
|
ObjCLanguageRuntime::ClassDescriptorSP objc_class_sp (GetClassDescriptor (valobj));
|
|
if (objc_class_sp)
|
|
{
|
|
if (!objc_class_sp->IsKVO())
|
|
return objc_class_sp;
|
|
|
|
ClassDescriptorSP non_kvo_objc_class_sp(objc_class_sp->GetSuperclass());
|
|
if (non_kvo_objc_class_sp && non_kvo_objc_class_sp->IsValid())
|
|
return non_kvo_objc_class_sp;
|
|
}
|
|
return ClassDescriptorSP();
|
|
}
|
|
|
|
|
|
ObjCLanguageRuntime::ClassDescriptorSP
|
|
ObjCLanguageRuntime::GetClassDescriptor (ObjCISA isa)
|
|
{
|
|
if (isa)
|
|
{
|
|
UpdateISAToDescriptorMap();
|
|
ObjCLanguageRuntime::ISAToDescriptorIterator pos = m_isa_to_descriptor.find(isa);
|
|
if (pos != m_isa_to_descriptor.end())
|
|
return pos->second;
|
|
}
|
|
return ClassDescriptorSP();
|
|
}
|
|
|
|
ObjCLanguageRuntime::ClassDescriptorSP
|
|
ObjCLanguageRuntime::GetNonKVOClassDescriptor (ObjCISA isa)
|
|
{
|
|
if (isa)
|
|
{
|
|
ClassDescriptorSP objc_class_sp = GetClassDescriptor (isa);
|
|
if (objc_class_sp && objc_class_sp->IsValid())
|
|
{
|
|
if (!objc_class_sp->IsKVO())
|
|
return objc_class_sp;
|
|
|
|
ClassDescriptorSP non_kvo_objc_class_sp(objc_class_sp->GetSuperclass());
|
|
if (non_kvo_objc_class_sp && non_kvo_objc_class_sp->IsValid())
|
|
return non_kvo_objc_class_sp;
|
|
}
|
|
}
|
|
return ClassDescriptorSP();
|
|
}
|
|
|
|
|
|
|