protected override void VisitLoadFieldInstruction(LoadFieldInstruction instruction)
{
ControlState.EvaluationStack.PopValue(_program, instruction.ClassTypeSpec.GetCilType(_program), out var instanceVal);
CilClassInstance classInstance = null;
if (instanceVal is CilValueValueType instanceValValueType)
{
classInstance = instanceValValueType.Value;
}
else if (instanceVal is CilValueReference instanceValReference)
{
classInstance = ManagedMemory.Load(instanceValReference) as CilClassInstance;
}
else
{
throw new System.NotImplementedException();
}
var value = classInstance.Fields[instruction.FieldId];
ControlState.EvaluationStack.PushValue(value);
ControlState.MoveToNextInstruction();
}
public override CILInstructionField BuildNode(ParseTreeNode node)
{
CILInstructionField result = null;
var instrFieldParseTreeNode = node.GetFirstChildWithGrammarName(GrammarNames.INSTR_FIELD);
var ldfldParseTreeNode = instrFieldParseTreeNode?.GetFirstChildWithGrammarName(GrammarNames.keyword_ldfld);
if (ldfldParseTreeNode != null)
{
result = new LoadFieldInstruction();
}
var ldfldaParseTreeNode = instrFieldParseTreeNode?.GetFirstChildWithGrammarName(GrammarNames.keyword_ldflda);
if (ldfldaParseTreeNode != null)
{
result = new LoadFieldAddressInstruction();
}
var ldsfldParseTreeNode = instrFieldParseTreeNode?.GetFirstChildWithGrammarName(GrammarNames.keyword_ldsfld);
if (ldsfldParseTreeNode != null)
{
result = new LoadStaticFieldInstruction();
}
var stfldParseTreeNode = instrFieldParseTreeNode?.GetFirstChildWithGrammarName(GrammarNames.keyword_stfld);
if (stfldParseTreeNode != null)
{
result = new SetFieldInstruction();
}
var stsfldParseTreeNode = instrFieldParseTreeNode?.GetFirstChildWithGrammarName(GrammarNames.keyword_stsfld);
if (stsfldParseTreeNode != null)
{
result = new SetStaticFieldInstruction();
}
if (result != null)
{
var typeParseTreeNode = node.GetFirstChildWithGrammarName(GrammarNames.type);
result.FieldType = TypeParseTreeNodeHelper.GetType(typeParseTreeNode);
var typeSpecParseTreeNode = node.GetFirstChildWithGrammarName(GrammarNames.typeSpec);
result.FieldOwnerTypeSpecification = TypeSpecParseTreeNodeHelper.GetValue(typeSpecParseTreeNode);
var idParseTreeNode = node.GetFirstChildWithGrammarName(GrammarNames.id);
result.FieldName = IdParseTreeNodeHelper.GetValue(idParseTreeNode);
return(result);
}
throw new ArgumentException("Cannot recognize CIL instruction field.");
}
private static Instruction GetLoadField(FieldInfo field)
{
lock (s_loadFields)
{
Instruction instruction;
if (!s_loadFields.TryGetValue(field, out instruction))
{
if (field.IsStatic)
{
instruction = new LoadStaticFieldInstruction(field);
}
else
{
instruction = new LoadFieldInstruction(field);
}
s_loadFields.Add(field, instruction);
}
return(instruction);
}
}
protected abstract void VisitLoadFieldInstruction(LoadFieldInstruction instruction);
