void
ValueObjectVariable::UpdateValue (ExecutionContextScope *exe_scope)
{
SetValueIsValid (false);
m_error.Clear();
Variable *variable = m_variable_sp.get();
DWARFExpression &expr = variable->LocationExpression();
Value old_value(m_value);
ExecutionContext exe_ctx (exe_scope);
if (expr.Evaluate (&exe_ctx, GetClangAST(), NULL, m_value, &m_error))
{
m_value.SetContext(Value::eContextTypeDCVariable, variable);
Value::ValueType value_type = m_value.GetValueType();
switch (value_type)
{
default:
assert(!"Unhandled expression result value kind...");
break;
case Value::eValueTypeScalar:
// 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);
break;
case Value::eValueTypeFileAddress:
case Value::eValueTypeLoadAddress:
case Value::eValueTypeHostAddress:
// The DWARF expression result was an address in the inferior
// process. If this variable is an aggregate type, we just need
// the address as the main value as all child variable objects
// will rely upon this location and add an offset and then read
// their own values as needed. If this variable is a simple
// type, we read all data for it into m_data.
// Make sure this type has a value before we try and read it
if (ClangASTContext::IsAggregateType (GetOpaqueClangQualType()))
{
// 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 (value_type != old_value.GetValueType() || m_value.GetScalar() != old_value.GetScalar());
}
else
{
// Copy the Value and set the context to use our Variable
// so it can extract read its value into m_data appropriately
Value value(m_value);
value.SetContext(Value::eContextTypeDCVariable, variable);
m_error = value.GetValueAsData(&exe_ctx, GetClangAST(), m_data, 0);
}
break;
}
SetValueIsValid (m_error.Success());
}
}
bool
ValueObjectVariable::UpdateValue ()
{
SetValueIsValid (false);
m_error.Clear();
Variable *variable = m_variable_sp.get();
DWARFExpression &expr = variable->LocationExpression();
if (variable->GetLocationIsConstantValueData())
{
// expr doesn't contain DWARF bytes, it contains the constant variable
// value bytes themselves...
if (expr.GetExpressionData(m_data))
m_value.SetContext(Value::eContextTypeVariable, variable);
else
m_error.SetErrorString ("empty constant data");
// constant bytes can't be edited - sorry
m_resolved_value.SetContext(Value::eContextTypeInvalid, NULL);
}
else
{
lldb::addr_t loclist_base_load_addr = LLDB_INVALID_ADDRESS;
ExecutionContext exe_ctx (GetExecutionContextRef());
Target *target = exe_ctx.GetTargetPtr();
if (target)
{
m_data.SetByteOrder(target->GetArchitecture().GetByteOrder());
m_data.SetAddressByteSize(target->GetArchitecture().GetAddressByteSize());
}
if (expr.IsLocationList())
{
SymbolContext sc;
variable->CalculateSymbolContext (&sc);
if (sc.function)
loclist_base_load_addr = sc.function->GetAddressRange().GetBaseAddress().GetLoadAddress (target);
}
Value old_value(m_value);
if (expr.Evaluate (&exe_ctx, NULL, NULL, NULL, loclist_base_load_addr, NULL, m_value, &m_error))
{
m_resolved_value = m_value;
m_value.SetContext(Value::eContextTypeVariable, variable);
ClangASTType clang_type = GetClangType();
if (clang_type.IsValid())
m_value.SetClangType(clang_type);
Value::ValueType value_type = m_value.GetValueType();
switch (value_type)
{
case Value::eValueTypeFileAddress:
SetAddressTypeOfChildren(eAddressTypeFile);
break;
case Value::eValueTypeHostAddress:
SetAddressTypeOfChildren(eAddressTypeHost);
break;
case Value::eValueTypeLoadAddress:
case Value::eValueTypeScalar:
case Value::eValueTypeVector:
SetAddressTypeOfChildren(eAddressTypeLoad);
break;
}
switch (value_type)
{
case Value::eValueTypeVector:
// fall through
case Value::eValueTypeScalar:
// 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, m_data, 0, GetModule().get());
break;
case Value::eValueTypeFileAddress:
case Value::eValueTypeLoadAddress:
case Value::eValueTypeHostAddress:
// The DWARF expression result was an address in the inferior
// process. If this variable is an aggregate type, we just need
// the address as the main value as all child variable objects
// will rely upon this location and add an offset and then read
// their own values as needed. If this variable is a simple
// type, we read all data for it into m_data.
// Make sure this type has a value before we try and read it
// If we have a file address, convert it to a load address if we can.
Process *process = exe_ctx.GetProcessPtr();
if (value_type == Value::eValueTypeFileAddress && process && process->IsAlive())
{
lldb::addr_t file_addr = m_value.GetScalar().ULongLong(LLDB_INVALID_ADDRESS);
if (file_addr != LLDB_INVALID_ADDRESS)
{
SymbolContext var_sc;
variable->CalculateSymbolContext(&var_sc);
if (var_sc.module_sp)
{
ObjectFile *objfile = var_sc.module_sp->GetObjectFile();
if (objfile)
{
Address so_addr(file_addr, objfile->GetSectionList());
lldb::addr_t load_addr = so_addr.GetLoadAddress (target);
if (load_addr != LLDB_INVALID_ADDRESS)
{
m_value.SetValueType(Value::eValueTypeLoadAddress);
m_value.GetScalar() = load_addr;
}
}
}
}
}
if (!CanProvideValue())
{
// 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 (value_type != old_value.GetValueType() || m_value.GetScalar() != old_value.GetScalar());
}
else
{
// Copy the Value and set the context to use our Variable
// so it can extract read its value into m_data appropriately
Value value(m_value);
value.SetContext(Value::eContextTypeVariable, variable);
m_error = value.GetValueAsData(&exe_ctx, m_data, 0, GetModule().get());
SetValueDidChange (value_type != old_value.GetValueType() || m_value.GetScalar() != old_value.GetScalar());
}
break;
}
SetValueIsValid (m_error.Success());
}
else
{
// could not find location, won't allow editing
m_resolved_value.SetContext(Value::eContextTypeInvalid, NULL);
}
}
return m_error.Success();
}