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//===-- ValueObjectDynamicValue.cpp ---------------------------------*- C++ -*-===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
#include "lldb/Core/ValueObjectDynamicValue.h"
// C Includes
// C++ Includes
// Other libraries and framework includes
// Project includes
#include "lldb/Core/Module.h"
#include "lldb/Core/ValueObjectList.h"
#include "lldb/Core/Value.h"
#include "lldb/Core/ValueObject.h"
#include "lldb/Symbol/ObjectFile.h"
#include "lldb/Symbol/SymbolContext.h"
#include "lldb/Symbol/Type.h"
#include "lldb/Symbol/Variable.h"
#include "lldb/Target/ExecutionContext.h"
#include "lldb/Target/LanguageRuntime.h"
#include "lldb/Target/Process.h"
#include "lldb/Target/RegisterContext.h"
#include "lldb/Target/Target.h"
#include "lldb/Target/Thread.h"
using namespace lldb_private;
ValueObjectDynamicValue::ValueObjectDynamicValue (ValueObject &parent) :
ValueObject(parent),
m_address (),
m_type_sp()
{
SetName (parent.GetName().AsCString());
}
ValueObjectDynamicValue::~ValueObjectDynamicValue()
{
m_owning_valobj_sp.reset();
}
lldb::clang_type_t
ValueObjectDynamicValue::GetClangType ()
{
if (m_type_sp)
return m_value.GetClangType();
else
return m_parent->GetClangType();
}
ConstString
ValueObjectDynamicValue::GetTypeName()
{
// FIXME: Maybe cache the name, but have to clear it out if the type changes...
if (!UpdateValueIfNeeded())
return ConstString("<unknown type>");
if (m_type_sp)
return ClangASTType::GetClangTypeName (GetClangType());
else
return m_parent->GetTypeName();
}
uint32_t
ValueObjectDynamicValue::CalculateNumChildren()
{
if (!UpdateValueIfNeeded())
return 0;
if (m_type_sp)
return ClangASTContext::GetNumChildren (GetClangAST (), GetClangType(), true);
else
return m_parent->GetNumChildren();
}
clang::ASTContext *
ValueObjectDynamicValue::GetClangAST ()
{
if (!UpdateValueIfNeeded())
return NULL;
if (m_type_sp)
return m_type_sp->GetClangAST();
else
return m_parent->GetClangAST ();
}
size_t
ValueObjectDynamicValue::GetByteSize()
{
if (!UpdateValueIfNeeded())
return 0;
if (m_type_sp)
return m_value.GetValueByteSize(GetClangAST(), NULL);
else
return m_parent->GetByteSize();
}
lldb::ValueType
ValueObjectDynamicValue::GetValueType() const
{
return m_parent->GetValueType();
}
bool
ValueObjectDynamicValue::UpdateValue ()
{
SetValueIsValid (false);
m_error.Clear();
if (!m_parent->UpdateValueIfNeeded())
{
return false;
}
ExecutionContext exe_ctx (GetExecutionContextScope());
if (exe_ctx.target)
{
m_data.SetByteOrder(exe_ctx.target->GetArchitecture().GetByteOrder());
m_data.SetAddressByteSize(exe_ctx.target->GetArchitecture().GetAddressByteSize());
}
// First make sure our Type and/or Address haven't changed:
Process *process = m_update_point.GetProcess();
if (!process)
return false;
lldb::TypeSP dynamic_type_sp;
Address dynamic_address;
bool found_dynamic_type = false;
lldb::LanguageType known_type = m_parent->GetObjectRuntimeLanguage();
if (known_type != lldb::eLanguageTypeUnknown && known_type != lldb::eLanguageTypeC)
{
LanguageRuntime *runtime = process->GetLanguageRuntime (known_type);
if (runtime)
found_dynamic_type = runtime->GetDynamicValue(*m_parent, dynamic_type_sp, dynamic_address);
}
else
{
LanguageRuntime *cpp_runtime = process->GetLanguageRuntime (lldb::eLanguageTypeC_plus_plus);
if (cpp_runtime)
found_dynamic_type = cpp_runtime->GetDynamicValue(*m_parent, dynamic_type_sp, dynamic_address);
if (!found_dynamic_type)
{
LanguageRuntime *objc_runtime = process->GetLanguageRuntime (lldb::eLanguageTypeObjC);
if (objc_runtime)
found_dynamic_type = cpp_runtime->GetDynamicValue(*m_parent, dynamic_type_sp, dynamic_address);
}
}
// If we don't have a dynamic type, then make ourselves just a echo of our parent.
// Or we could return false, and make ourselves an echo of our parent?
if (!found_dynamic_type)
{
if (m_type_sp)
SetValueDidChange(true);
m_value = m_parent->GetValue();
m_error = m_value.GetValueAsData (&exe_ctx, GetClangAST(), m_data, 0);
return m_error.Success();
}
Value old_value(m_value);
if (!m_type_sp)
{
m_type_sp = dynamic_type_sp;
}
else if (dynamic_type_sp != m_type_sp)
{
// We are another type, we need to tear down our children...
m_type_sp = dynamic_type_sp;
SetValueDidChange (true);
}
if (!m_address.IsValid() || m_address != dynamic_address)
{
if (m_address.IsValid())
SetValueDidChange (true);
// We've moved, so we should be fine...
m_address = dynamic_address;
lldb::addr_t load_address = m_address.GetLoadAddress(m_update_point.GetTarget());
m_value.GetScalar() = load_address;
}
// The type will always be the type of the dynamic object. If our parent's type was a pointer,
// then our type should be a pointer to the type of the dynamic object. If a reference, then the original type
// should be okay...
lldb::clang_type_t orig_type = m_type_sp->GetClangForwardType();
lldb::clang_type_t corrected_type = orig_type;
if (m_parent->IsPointerType())
corrected_type = ClangASTContext::CreatePointerType (m_type_sp->GetClangAST(), orig_type);
else if (m_parent->IsPointerOrReferenceType())
corrected_type = ClangASTContext::CreateLValueReferenceType (m_type_sp->GetClangAST(), orig_type);
m_value.SetContext (Value::eContextTypeClangType, corrected_type);
// Our address is the location of the dynamic type stored in memory. It isn't a load address,
// because we aren't pointing to the LOCATION that stores the pointer to us, we're pointing to us...
m_value.SetValueType(Value::eValueTypeScalar);
if (m_address.IsValid() && m_type_sp)
{
// The variable value is in the Scalar value inside the m_value.
// We can point our m_data right to it.
m_error = m_value.GetValueAsData (&exe_ctx, GetClangAST(), m_data, 0);
if (m_error.Success())
{
if (ClangASTContext::IsAggregateType (GetClangType()))
{
// this value object represents an aggregate type whose
// children have values, but this object does not. So we
// say we are changed if our location has changed.
SetValueDidChange (m_value.GetValueType() != old_value.GetValueType() || m_value.GetScalar() != old_value.GetScalar());
}
SetValueIsValid (true);
return true;
}
}
// We get here if we've failed above...
SetValueIsValid (false);
return false;
}
bool
ValueObjectDynamicValue::IsInScope ()
{
return m_parent->IsInScope();
}
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