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Cleanup in the AppleObjCRuntimeV2 to make descriptors 

lighter-weight so that the cache can be populated
faster.

- I Added a ProcessWP to the runtime so I can
  take it out of the individual descriptors, saving
  space;
- I made the constructors for the descriptors
  private so that only the runtime can invoke them; 
  and
- I removed the constructor that takes a ValueObject
  since the logic for using a ValueObject is in the
  runtime.

llvm-svn: 165549
This commit is contained in:
Sean Callanan 2012-10-09 21:21:35 +00:00
parent b3723341f3
commit 880ee17fb8
2 changed files with 23 additions and 30 deletions
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46
lldb/source/Plugins/LanguageRuntime/ObjC/AppleObjCRuntime/AppleObjCRuntimeV2.cpp
View File

@ -107,7 +107,8 @@ AppleObjCRuntimeV2::AppleObjCRuntimeV2 (Process *process,
const ModuleSP &objc_module_sp) :
AppleObjCRuntime (process),
m_get_class_name_args(LLDB_INVALID_ADDRESS),
m_get_class_name_args_mutex(Mutex::eMutexTypeNormal)
m_get_class_name_args_mutex(Mutex::eMutexTypeNormal),
m_process_wp (process->shared_from_this())
{
static const ConstString g_gdb_object_getClass("gdb_object_getClass");
m_has_object_getClass = (objc_module_sp->FindFirstSymbolWithNameAndType(g_gdb_object_getClass, eSymbolTypeCode) != NULL);
@ -973,7 +974,12 @@ private:
class ClassDescriptorV2 : public ObjCLanguageRuntime::ClassDescriptor
{
public:
ClassDescriptorV2 (ObjCLanguageRuntime &runtime, ValueObject &ptr_to_object) :
friend class lldb_private::AppleObjCRuntimeV2;
private:
// The constructor should only be invoked by the runtime as it builds its caches
// or populates them. A ClassDescriptorV2 should only ever exist in a cache.
ClassDescriptorV2 (AppleObjCRuntimeV2 &runtime, ObjCLanguageRuntime::ObjCISA isa) :
m_runtime (runtime),
m_valid (false),
m_objc_class_ptr (0),
@ -983,30 +989,10 @@ public:
m_realized (eLazyBoolCalculate),
m_process_wp ()
{
lldb::addr_t object_ptr = ptr_to_object.GetValueAsUnsigned(0);
lldb::ProcessSP process_sp = ptr_to_object.GetProcessSP();
Error error;
ObjCLanguageRuntime::ObjCISA isa = process_sp->ReadPointerFromMemory(object_ptr,
error);
if (isa != LLDB_INVALID_ADDRESS)
Initialize (isa, process_sp);
}
ClassDescriptorV2 (ObjCLanguageRuntime &runtime, ObjCLanguageRuntime::ObjCISA isa, lldb::ProcessSP process_sp) :
m_runtime (runtime),
m_valid (false),
m_objc_class_ptr (0),
m_objc_class (),
m_name (),
m_instance_size (0),
m_realized (eLazyBoolCalculate),
m_process_wp ()
{
Initialize (isa, process_sp);
Initialize (isa, m_runtime.GetProcessSP());
}
public:
virtual ConstString
GetClassName ()
{
@ -1062,7 +1048,7 @@ public:
if (!m_valid)
return ObjCLanguageRuntime::ClassDescriptorSP();
return m_runtime.GetClassDescriptor(m_objc_class.m_superclass);
return m_runtime.ObjCLanguageRuntime::GetClassDescriptor(m_objc_class.m_superclass);
}
virtual bool
@ -1178,7 +1164,7 @@ public:
if (class_method_func)
{
ObjCLanguageRuntime::ClassDescriptorSP metaclass = m_runtime.GetClassDescriptor(m_objc_class.m_isa);
ObjCLanguageRuntime::ClassDescriptorSP metaclass = m_runtime.ObjCLanguageRuntime::GetClassDescriptor(m_objc_class.m_isa);
// We don't care about the metaclass's superclass, or its class methods. Its instance methods are
// our class methods.
@ -1590,7 +1576,7 @@ private:
}
};
ObjCLanguageRuntime &m_runtime; // The runtime, so we can read our metaclass.
AppleObjCRuntimeV2 &m_runtime; // The runtime, so we can read our metaclass.
bool m_valid; // Gates whether we trust anything here at all.
lldb::addr_t m_objc_class_ptr; // The address of the objc_class_t.
objc_class_t m_objc_class;
@ -1800,7 +1786,7 @@ AppleObjCRuntimeV2::CreateClassDescriptor (ObjCISA isa)
{
ClassDescriptorSP objc_class_sp;
if (isa != 0)
objc_class_sp.reset (new ClassDescriptorV2(*this, isa, m_process->CalculateProcess()));
objc_class_sp.reset (new ClassDescriptorV2(*this, isa));
return objc_class_sp;
}
@ -1904,7 +1890,7 @@ AppleObjCRuntimeV2::UpdateISAToDescriptorMap_Impl()
if (m_isa_to_descriptor_cache.count(elt.second))
continue;
ClassDescriptorSP descriptor_sp = ClassDescriptorSP(new ClassDescriptorV2(*this, elt.second, process_sp));
ClassDescriptorSP descriptor_sp = ClassDescriptorSP(new ClassDescriptorV2(*this, elt.second));
if (log && log->GetVerbose())
log->Printf("AppleObjCRuntimeV2 added (ObjCISA)0x%llx (%s) from dynamic table to isa->descriptor cache", elt.second, elt.first.AsCString());
@ -1950,7 +1936,7 @@ AppleObjCRuntimeV2::UpdateISAToDescriptorMap_Impl()
if (m_isa_to_descriptor_cache.count(objc_isa))
continue;
ClassDescriptorSP descriptor_sp = ClassDescriptorSP(new ClassDescriptorV2(*this, objc_isa, process_sp));
ClassDescriptorSP descriptor_sp = ClassDescriptorSP(new ClassDescriptorV2(*this, objc_isa));
if (log && log->GetVerbose())
log->Printf("AppleObjCRuntimeV2 added (ObjCISA)0x%llx (%s) from static table to isa->descriptor cache", objc_isa, descriptor_sp->GetClassName().AsCString());

7
lldb/source/Plugins/LanguageRuntime/ObjC/AppleObjCRuntime/AppleObjCRuntimeV2.h
View File

@ -110,6 +110,12 @@ public:
virtual TypeVendor *
GetTypeVendor();
lldb::ProcessSP
GetProcessSP ()
{
return m_process_wp.lock();
}
protected:
virtual lldb::BreakpointResolverSP
CreateExceptionResolver (Breakpoint *bkpt, bool catch_bp, bool throw_bp);
@ -131,6 +137,7 @@ private:
Mutex m_get_class_name_args_mutex;
std::auto_ptr<TypeVendor> m_type_vendor_ap;
lldb::ProcessWP m_process_wp; // used by class descriptors to lazily fill their own data
static const char *g_find_class_name_function_name;
static const char *g_find_class_name_function_body;