2010-06-09 00:52:24 +08:00
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//===-- ValueObjectVariable.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/ValueObjectVariable.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/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/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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2010-09-02 10:59:18 +08:00
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ValueObjectVariable::ValueObjectVariable (const lldb::VariableSP &var_sp) :
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2010-10-15 06:52:14 +08:00
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ValueObject(NULL),
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2010-06-09 00:52:24 +08:00
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m_variable_sp(var_sp)
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{
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// Do not attempt to construct one of these objects with no variable!
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assert (m_variable_sp.get() != NULL);
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m_name = var_sp->GetName();
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}
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ValueObjectVariable::~ValueObjectVariable()
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{
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}
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void *
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2010-09-29 09:12:09 +08:00
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ValueObjectVariable::GetClangType ()
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2010-06-09 00:52:24 +08:00
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{
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Type *var_type = m_variable_sp->GetType();
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if (var_type)
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2010-09-29 09:12:09 +08:00
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return var_type->GetClangType();
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2010-06-09 00:52:24 +08:00
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return NULL;
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}
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ConstString
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ValueObjectVariable::GetTypeName()
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{
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Type * var_type = m_variable_sp->GetType();
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if (var_type)
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return var_type->GetName();
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ConstString empty_type_name;
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return empty_type_name;
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}
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uint32_t
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ValueObjectVariable::CalculateNumChildren()
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{
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Type *var_type = m_variable_sp->GetType();
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if (var_type)
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return var_type->GetNumChildren(true);
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return 0;
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}
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clang::ASTContext *
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ValueObjectVariable::GetClangAST ()
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{
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return m_variable_sp->GetType()->GetClangAST();
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}
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size_t
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ValueObjectVariable::GetByteSize()
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{
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return m_variable_sp->GetType()->GetByteSize();
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}
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lldb::ValueType
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ValueObjectVariable::GetValueType() const
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{
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if (m_variable_sp)
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return m_variable_sp->GetScope();
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return lldb::eValueTypeInvalid;
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}
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void
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ValueObjectVariable::UpdateValue (ExecutionContextScope *exe_scope)
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{
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SetValueIsValid (false);
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m_error.Clear();
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Variable *variable = m_variable_sp.get();
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DWARFExpression &expr = variable->LocationExpression();
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2010-09-14 10:20:48 +08:00
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lldb::addr_t loclist_base_load_addr = LLDB_INVALID_ADDRESS;
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2010-06-09 00:52:24 +08:00
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ExecutionContext exe_ctx (exe_scope);
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2010-09-18 12:00:06 +08:00
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if (exe_ctx.process)
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{
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m_data.SetByteOrder(exe_ctx.process->GetByteOrder());
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m_data.SetAddressByteSize(exe_ctx.process->GetAddressByteSize());
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}
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2010-09-14 10:20:48 +08:00
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if (expr.IsLocationList())
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{
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SymbolContext sc;
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variable->CalculateSymbolContext (&sc);
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if (sc.function)
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2010-09-15 07:36:40 +08:00
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loclist_base_load_addr = sc.function->GetAddressRange().GetBaseAddress().GetLoadAddress (exe_ctx.target);
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2010-09-14 10:20:48 +08:00
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}
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Value old_value(m_value);
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2010-11-20 09:28:30 +08:00
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if (expr.Evaluate (&exe_ctx, GetClangAST(), NULL, loclist_base_load_addr, NULL, m_value, &m_error))
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2010-06-09 00:52:24 +08:00
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{
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2010-11-13 11:52:47 +08:00
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m_value.SetContext(Value::eContextTypeVariable, variable);
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2010-06-09 00:52:24 +08:00
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Value::ValueType value_type = m_value.GetValueType();
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switch (value_type)
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{
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default:
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assert(!"Unhandled expression result value kind...");
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break;
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case Value::eValueTypeScalar:
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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);
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break;
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case Value::eValueTypeFileAddress:
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case Value::eValueTypeLoadAddress:
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case Value::eValueTypeHostAddress:
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// The DWARF expression result was an address in the inferior
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// process. If this variable is an aggregate type, we just need
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// the address as the main value as all child variable objects
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// will rely upon this location and add an offset and then read
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// their own values as needed. If this variable is a simple
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// type, we read all data for it into m_data.
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// Make sure this type has a value before we try and read it
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2010-09-13 10:37:44 +08:00
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// If we have a file address, convert it to a load address if we can.
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if (value_type == Value::eValueTypeFileAddress && exe_ctx.process)
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{
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lldb::addr_t file_addr = m_value.GetScalar().ULongLong(LLDB_INVALID_ADDRESS);
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if (file_addr != LLDB_INVALID_ADDRESS)
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{
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SymbolContext var_sc;
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variable->CalculateSymbolContext(&var_sc);
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if (var_sc.module_sp)
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{
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ObjectFile *objfile = var_sc.module_sp->GetObjectFile();
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if (objfile)
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{
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Address so_addr(file_addr, objfile->GetSectionList());
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2010-09-15 07:36:40 +08:00
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lldb::addr_t load_addr = so_addr.GetLoadAddress (exe_ctx.target);
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2010-09-13 10:37:44 +08:00
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if (load_addr != LLDB_INVALID_ADDRESS)
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{
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m_value.SetValueType(Value::eValueTypeLoadAddress);
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m_value.GetScalar() = load_addr;
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}
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}
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}
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}
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}
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2010-09-29 09:12:09 +08:00
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if (ClangASTContext::IsAggregateType (GetClangType()))
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2010-06-09 00:52:24 +08:00
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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 (value_type != old_value.GetValueType() || m_value.GetScalar() != old_value.GetScalar());
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}
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else
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{
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// Copy the Value and set the context to use our Variable
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// so it can extract read its value into m_data appropriately
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Value value(m_value);
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2010-11-13 11:52:47 +08:00
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value.SetContext(Value::eContextTypeVariable, variable);
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2010-06-09 00:52:24 +08:00
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m_error = value.GetValueAsData(&exe_ctx, GetClangAST(), m_data, 0);
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}
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break;
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}
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SetValueIsValid (m_error.Success());
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}
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}
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bool
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ValueObjectVariable::IsInScope (StackFrame *frame)
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{
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return m_variable_sp->IsInScope (frame);
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}
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