forked from OSchip/llvm-project
398 lines
12 KiB
C++
398 lines
12 KiB
C++
//===-- ValueObjectDynamicValue.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 "lldb/Core/ValueObjectDynamicValue.h"
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// C Includes
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// C++ Includes
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// Other libraries and framework includes
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// Project includes
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#include "lldb/Core/Module.h"
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#include "lldb/Core/ValueObjectList.h"
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#include "lldb/Core/Value.h"
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#include "lldb/Core/ValueObject.h"
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#include "lldb/Symbol/ObjectFile.h"
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#include "lldb/Symbol/SymbolContext.h"
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#include "lldb/Symbol/Type.h"
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#include "lldb/Symbol/Variable.h"
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#include "lldb/Target/ExecutionContext.h"
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#include "lldb/Target/LanguageRuntime.h"
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#include "lldb/Target/Process.h"
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#include "lldb/Target/RegisterContext.h"
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#include "lldb/Target/Target.h"
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#include "lldb/Target/Thread.h"
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using namespace lldb_private;
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lldb::ValueObjectSP
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ValueObjectCast::Create (ValueObject &parent,
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const ConstString &name,
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const ClangASTType &cast_type)
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{
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ValueObjectCast *cast_valobj_ptr = new ValueObjectCast (parent, name, cast_type);
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return cast_valobj_ptr->GetSP();
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}
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ValueObjectCast::ValueObjectCast
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(
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ValueObject &parent,
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const ConstString &name,
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const ClangASTType &cast_type
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) :
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ValueObject(parent),
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m_cast_type (cast_type)
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{
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SetName (name);
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m_value.SetContext (Value::eContextTypeClangType, cast_type.GetOpaqueQualType());
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}
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ValueObjectCast::~ValueObjectCast()
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{
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}
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lldb::clang_type_t
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ValueObjectCast::GetClangTypeImpl ()
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{
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return m_cast_type.GetOpaqueQualType();
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}
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uint32_t
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ValueObjectCast::CalculateNumChildren()
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{
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return ClangASTContext::GetNumChildren (GetClangAST (), GetClangType(), true);
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}
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clang::ASTContext *
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ValueObjectCast::GetClangASTImpl ()
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{
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return m_cast_type.GetASTContext();
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}
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size_t
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ValueObjectCast::GetByteSize()
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{
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return m_value.GetValueByteSize(GetClangAST(), NULL);
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}
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lldb::ValueType
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ValueObjectCast::GetValueType() const
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{
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// Let our parent answer global, local, argument, etc...
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return m_parent->GetValueType();
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}
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bool
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ValueObjectCast::UpdateValue ()
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{
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SetValueIsValid (false);
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m_error.Clear();
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if (m_parent->UpdateValueIfNeeded(false))
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{
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Value old_value(m_value);
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m_update_point.SetUpdated();
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m_value = m_parent->GetValue();
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m_value.SetContext (Value::eContextTypeClangType, GetClangType());
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SetAddressTypeOfChildren(m_parent->GetAddressTypeOfChildren());
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if (ClangASTContext::IsAggregateType (GetClangType()))
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{
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// this value object represents an aggregate type whose
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// children have values, but this object does not. So we
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// say we are changed if our location has changed.
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SetValueDidChange (m_value.GetValueType() != old_value.GetValueType() || m_value.GetScalar() != old_value.GetScalar());
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}
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ExecutionContext exe_ctx (GetExecutionContextRef());
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m_error = m_value.GetValueAsData(&exe_ctx, GetClangAST(), m_data, 0, GetModule().get());
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SetValueDidChange (m_parent->GetValueDidChange());
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return true;
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}
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// The dynamic value failed to get an error, pass the error along
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if (m_error.Success() && m_parent->GetError().Fail())
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m_error = m_parent->GetError();
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SetValueIsValid (false);
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return false;
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}
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bool
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ValueObjectCast::IsInScope ()
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{
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return m_parent->IsInScope();
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}
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//----------------------------------------------------------------------
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ValueObjectDynamicValue::ValueObjectDynamicValue (ValueObject &parent, lldb::DynamicValueType use_dynamic) :
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ValueObject(parent),
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m_address (),
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m_type_sp(),
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m_use_dynamic (use_dynamic)
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{
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m_last_format_mgr_dynamic = use_dynamic;
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SetName (parent.GetName());
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}
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ValueObjectDynamicValue::~ValueObjectDynamicValue()
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{
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m_owning_valobj_sp.reset();
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}
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lldb::clang_type_t
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ValueObjectDynamicValue::GetClangTypeImpl ()
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{
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if (m_type_sp)
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return m_value.GetClangType();
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else
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return m_parent->GetClangType();
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}
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ConstString
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ValueObjectDynamicValue::GetTypeName()
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{
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const bool success = UpdateValueIfNeeded(false);
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if (success && m_type_sp)
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return ClangASTType::GetConstTypeName (GetClangAST(), GetClangType());
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else
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return m_parent->GetTypeName();
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}
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uint32_t
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ValueObjectDynamicValue::CalculateNumChildren()
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{
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const bool success = UpdateValueIfNeeded(false);
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if (success && m_type_sp)
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return ClangASTContext::GetNumChildren (GetClangAST (), GetClangType(), true);
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else
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return m_parent->GetNumChildren();
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}
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clang::ASTContext *
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ValueObjectDynamicValue::GetClangASTImpl ()
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{
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const bool success = UpdateValueIfNeeded(false);
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if (success && m_type_sp)
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return m_type_sp->GetClangAST();
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else
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return m_parent->GetClangAST ();
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}
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size_t
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ValueObjectDynamicValue::GetByteSize()
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{
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const bool success = UpdateValueIfNeeded(false);
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if (success && m_type_sp)
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return m_value.GetValueByteSize(GetClangAST(), NULL);
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else
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return m_parent->GetByteSize();
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}
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lldb::ValueType
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ValueObjectDynamicValue::GetValueType() const
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{
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return m_parent->GetValueType();
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}
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bool
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ValueObjectDynamicValue::UpdateValue ()
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{
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SetValueIsValid (false);
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m_error.Clear();
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if (!m_parent->UpdateValueIfNeeded(false))
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{
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// The dynamic value failed to get an error, pass the error along
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if (m_error.Success() && m_parent->GetError().Fail())
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m_error = m_parent->GetError();
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return false;
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}
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// Setting our type_sp to NULL will route everything back through our
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// parent which is equivalent to not using dynamic values.
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if (m_use_dynamic == lldb::eNoDynamicValues)
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{
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m_type_sp.reset();
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return true;
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}
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ExecutionContext exe_ctx (GetExecutionContextRef());
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Target *target = exe_ctx.GetTargetPtr();
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if (target)
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{
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m_data.SetByteOrder(target->GetArchitecture().GetByteOrder());
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m_data.SetAddressByteSize(target->GetArchitecture().GetAddressByteSize());
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}
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// First make sure our Type and/or Address haven't changed:
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Process *process = exe_ctx.GetProcessPtr();
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if (!process)
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return false;
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TypeAndOrName class_type_or_name;
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Address dynamic_address;
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bool found_dynamic_type = false;
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lldb::LanguageType known_type = m_parent->GetObjectRuntimeLanguage();
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if (known_type != lldb::eLanguageTypeUnknown && known_type != lldb::eLanguageTypeC)
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{
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LanguageRuntime *runtime = process->GetLanguageRuntime (known_type);
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if (runtime)
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found_dynamic_type = runtime->GetDynamicTypeAndAddress (*m_parent, m_use_dynamic, class_type_or_name, dynamic_address);
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}
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else
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{
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LanguageRuntime *cpp_runtime = process->GetLanguageRuntime (lldb::eLanguageTypeC_plus_plus);
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if (cpp_runtime)
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found_dynamic_type = cpp_runtime->GetDynamicTypeAndAddress (*m_parent, m_use_dynamic, class_type_or_name, dynamic_address);
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if (!found_dynamic_type)
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{
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LanguageRuntime *objc_runtime = process->GetLanguageRuntime (lldb::eLanguageTypeObjC);
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if (objc_runtime)
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found_dynamic_type = objc_runtime->GetDynamicTypeAndAddress (*m_parent, m_use_dynamic, class_type_or_name, dynamic_address);
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}
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}
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lldb::TypeSP dynamic_type_sp = class_type_or_name.GetTypeSP();
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// Getting the dynamic value may have run the program a bit, and so marked us as needing updating, but we really
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// don't...
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m_update_point.SetUpdated();
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// If we don't have a dynamic type, then make ourselves just a echo of our parent.
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// Or we could return false, and make ourselves an echo of our parent?
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if (!found_dynamic_type)
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{
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if (m_type_sp)
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SetValueDidChange(true);
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m_value = m_parent->GetValue();
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m_error = m_value.GetValueAsData (&exe_ctx, GetClangAST(), m_data, 0, GetModule().get());
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return m_error.Success();
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}
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Value old_value(m_value);
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if (!m_type_sp)
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{
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m_type_sp = dynamic_type_sp;
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}
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else if (dynamic_type_sp != m_type_sp)
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{
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// We are another type, we need to tear down our children...
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m_type_sp = dynamic_type_sp;
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SetValueDidChange (true);
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}
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if (!m_address.IsValid() || m_address != dynamic_address)
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{
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if (m_address.IsValid())
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SetValueDidChange (true);
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// We've moved, so we should be fine...
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m_address = dynamic_address;
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lldb::TargetSP target_sp (GetTargetSP());
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lldb::addr_t load_address = m_address.GetLoadAddress(target_sp.get());
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m_value.GetScalar() = load_address;
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}
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// The type will always be the type of the dynamic object. If our parent's type was a pointer,
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// then our type should be a pointer to the type of the dynamic object. If a reference, then the original type
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// should be okay...
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lldb::clang_type_t orig_type = m_type_sp->GetClangForwardType();
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lldb::clang_type_t corrected_type = orig_type;
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if (m_parent->IsPointerType())
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corrected_type = ClangASTContext::CreatePointerType (m_type_sp->GetClangAST(), orig_type);
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else if (m_parent->IsPointerOrReferenceType())
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corrected_type = ClangASTContext::CreateLValueReferenceType (m_type_sp->GetClangAST(), orig_type);
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m_value.SetContext (Value::eContextTypeClangType, corrected_type);
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// Our address is the location of the dynamic type stored in memory. It isn't a load address,
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// because we aren't pointing to the LOCATION that stores the pointer to us, we're pointing to us...
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m_value.SetValueType(Value::eValueTypeScalar);
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if (m_address.IsValid() && m_type_sp)
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{
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// The variable value is in the Scalar value inside the m_value.
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// We can point our m_data right to it.
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m_error = m_value.GetValueAsData (&exe_ctx, GetClangAST(), m_data, 0, GetModule().get());
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if (m_error.Success())
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{
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if (ClangASTContext::IsAggregateType (GetClangType()))
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{
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// this value object represents an aggregate type whose
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// children have values, but this object does not. So we
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// say we are changed if our location has changed.
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SetValueDidChange (m_value.GetValueType() != old_value.GetValueType() || m_value.GetScalar() != old_value.GetScalar());
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}
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SetValueIsValid (true);
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return true;
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}
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}
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// We get here if we've failed above...
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SetValueIsValid (false);
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return false;
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}
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bool
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ValueObjectDynamicValue::IsInScope ()
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{
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return m_parent->IsInScope();
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}
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bool
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ValueObjectDynamicValue::SetValueFromCString (const char *value_str, Error& error)
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{
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if (!UpdateValueIfNeeded(false))
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{
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error.SetErrorString("unable to read value");
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return false;
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}
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uint64_t my_value = GetValueAsUnsigned(UINT64_MAX);
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uint64_t parent_value = m_parent->GetValueAsUnsigned(UINT64_MAX);
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if (my_value == UINT64_MAX || parent_value == UINT64_MAX)
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{
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error.SetErrorString("unable to read value");
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return false;
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}
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// if we are at an offset from our parent, in order to set ourselves correctly we would need
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// to change the new value so that it refers to the correct dynamic type. we choose not to deal
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// with that - if anything more than a value overwrite is required, you should be using the
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// expression parser instead of the value editing facility
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if (my_value != parent_value)
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{
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// but NULL'ing out a value should always be allowed
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if (strcmp(value_str,"0"))
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{
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error.SetErrorString("unable to modify dynamic value, use 'expression' command");
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return false;
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}
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}
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bool ret_val = m_parent->SetValueFromCString(value_str,error);
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SetNeedsUpdate();
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return ret_val;
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}
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