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//===-- ValueObjectChild.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/ValueObjectChild.h"
#include "lldb/Core/Module.h"
#include "lldb/Core/ValueObjectList.h"
#include "lldb/Symbol/ClangASTType.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/Process.h"
#include "lldb/Target/Target.h"
using namespace lldb_private;
ValueObjectChild::ValueObjectChild
(
ValueObject &parent,
const ClangASTType &clang_type,
const ConstString &name,
uint64_t byte_size,
int32_t byte_offset,
uint32_t bitfield_bit_size,
uint32_t bitfield_bit_offset,
bool is_base_class,
bool is_deref_of_parent,
AddressType child_ptr_or_ref_addr_type
) :
ValueObject (parent),
m_clang_type (clang_type),
m_byte_size (byte_size),
m_byte_offset (byte_offset),
m_bitfield_bit_size (bitfield_bit_size),
m_bitfield_bit_offset (bitfield_bit_offset),
m_is_base_class (is_base_class),
m_is_deref_of_parent (is_deref_of_parent)
{
m_name = name;
SetAddressTypeOfChildren(child_ptr_or_ref_addr_type);
}
ValueObjectChild::~ValueObjectChild()
{
}
lldb::ValueType
ValueObjectChild::GetValueType() const
{
return m_parent->GetValueType();
}
size_t
ValueObjectChild::CalculateNumChildren()
{
return GetClangType().GetNumChildren (true);
}
static void
AdjustForBitfieldness(ConstString& name,
uint8_t bitfield_bit_size)
{
if (name && bitfield_bit_size)
{
const char *clang_type_name = name.AsCString();
if (clang_type_name)
{
std::vector<char> bitfield_type_name (strlen(clang_type_name) + 32, 0);
::snprintf (&bitfield_type_name.front(), bitfield_type_name.size(), "%s:%u", clang_type_name, bitfield_bit_size);
name.SetCString(&bitfield_type_name.front());
}
}
}
ConstString
ValueObjectChild::GetTypeName()
{
if (m_type_name.IsEmpty())
{
m_type_name = GetClangType().GetConstTypeName ();
AdjustForBitfieldness(m_type_name, m_bitfield_bit_size);
}
return m_type_name;
}
ConstString
ValueObjectChild::GetQualifiedTypeName()
{
ConstString qualified_name = GetClangType().GetConstTypeName();
AdjustForBitfieldness(qualified_name, m_bitfield_bit_size);
return qualified_name;
}
ConstString
ValueObjectChild::GetDisplayTypeName()
{
ConstString display_name = GetClangType().GetDisplayTypeName();
AdjustForBitfieldness(display_name, m_bitfield_bit_size);
return display_name;
}
bool
ValueObjectChild::CanUpdateWithInvalidExecutionContext ()
{
if (m_parent)
return m_parent->CanUpdateWithInvalidExecutionContext();
return this->ValueObject::CanUpdateWithInvalidExecutionContext();
}
bool
ValueObjectChild::UpdateValue ()
{
m_error.Clear();
SetValueIsValid (false);
ValueObject* parent = m_parent;
if (parent)
{
if (parent->UpdateValueIfNeeded(false))
{
m_value.SetClangType(GetClangType());
// Copy the parent scalar value and the scalar value type
m_value.GetScalar() = parent->GetValue().GetScalar();
Value::ValueType value_type = parent->GetValue().GetValueType();
m_value.SetValueType (value_type);
if (parent->GetClangType().IsPointerOrReferenceType ())
{
lldb::addr_t addr = parent->GetPointerValue ();
m_value.GetScalar() = addr;
if (addr == LLDB_INVALID_ADDRESS)
{
m_error.SetErrorString ("parent address is invalid.");
}
else if (addr == 0)
{
m_error.SetErrorString ("parent is NULL");
}
else
{
m_value.GetScalar() += m_byte_offset;
AddressType addr_type = parent->GetAddressTypeOfChildren();
switch (addr_type)
{
case eAddressTypeFile:
{
lldb::ProcessSP process_sp (GetProcessSP());
if (process_sp && process_sp->IsAlive() == true)
m_value.SetValueType (Value::eValueTypeLoadAddress);
else
m_value.SetValueType(Value::eValueTypeFileAddress);
}
break;
case eAddressTypeLoad:
m_value.SetValueType (Value::eValueTypeLoadAddress);
break;
case eAddressTypeHost:
m_value.SetValueType(Value::eValueTypeHostAddress);
break;
case eAddressTypeInvalid:
// TODO: does this make sense?
m_value.SetValueType(Value::eValueTypeScalar);
break;
}
}
}
else
{
switch (value_type)
{
case Value::eValueTypeLoadAddress:
case Value::eValueTypeFileAddress:
case Value::eValueTypeHostAddress:
{
lldb::addr_t addr = m_value.GetScalar().ULongLong(LLDB_INVALID_ADDRESS);
if (addr == LLDB_INVALID_ADDRESS)
{
m_error.SetErrorString ("parent address is invalid.");
}
else if (addr == 0)
{
m_error.SetErrorString ("parent is NULL");
}
else
{
// Set this object's scalar value to the address of its
// value by adding its byte offset to the parent address
m_value.GetScalar() += GetByteOffset();
}
}
break;
case Value::eValueTypeScalar:
// TODO: What if this is a register value? Do we try and
// extract the child value from within the parent data?
// Probably...
default:
m_error.SetErrorString ("parent has invalid value.");
break;
}
}
if (m_error.Success())
{
const bool thread_and_frame_only_if_stopped = true;
ExecutionContext exe_ctx (GetExecutionContextRef().Lock(thread_and_frame_only_if_stopped));
if (GetClangType().GetTypeInfo() & lldb::eTypeHasValue)
m_error = m_value.GetValueAsData (&exe_ctx, m_data, 0, GetModule().get());
else
m_error.Clear(); // No value so nothing to read...
}
}
else
{
m_error.SetErrorStringWithFormat("parent failed to evaluate: %s", parent->GetError().AsCString());
}
}
else
{
m_error.SetErrorString("ValueObjectChild has a NULL parent ValueObject.");
}
return m_error.Success();
}
bool
ValueObjectChild::IsInScope ()
{
ValueObject* root(GetRoot());
if (root)
return root->IsInScope ();
return false;
}
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