internal void LazyEmitUnboxSpecial(Type type)
{
BoxExpr box = PeekStack() as BoxExpr;
if (box != null)
{
PopStack();
// the unbox and lazy box cancel each other out
PushStackMayBeNull(box.Expr);
}
else
{
// NOTE if the reference is null, we treat it as a default instance of the value type.
Emit(OpCodes.Dup);
CodeEmitterLabel label1 = DefineLabel();
Emit(OpCodes.Brtrue_S, label1);
Emit(OpCodes.Pop);
Emit(OpCodes.Ldloc, DeclareLocal(type));
CodeEmitterLabel label2 = DefineLabel();
Emit(OpCodes.Br_S, label2);
MarkLabel(label1);
Emit(OpCodes.Unbox, type);
Emit(OpCodes.Ldobj, type);
MarkLabel(label2);
}
}
internal void LazyEmit_ldiv()
{
// we need to special case dividing by -1, because the CLR div instruction
// throws an OverflowException when dividing Int32.MinValue by -1, and
// Java just silently overflows
ConstLongExpr v = PeekStack() as ConstLongExpr;
if (v != null)
{
if (v.l == -1)
{
PopStack();
Emit(OpCodes.Neg);
}
else
{
Emit(OpCodes.Div);
}
}
else
{
Emit(OpCodes.Dup);
Emit(OpCodes.Ldc_I4_M1);
Emit(OpCodes.Conv_I8);
CodeEmitterLabel label = DefineLabel();
Emit(OpCodes.Bne_Un_S, label);
Emit(OpCodes.Pop);
Emit(OpCodes.Neg);
CodeEmitterLabel label2 = DefineLabel();
Emit(OpCodes.Br_S, label2);
MarkLabel(label);
Emit(OpCodes.Div);
MarkLabel(label2);
}
}
private static void AddReadResolve(DynamicTypeWrapper wrapper, TypeBuilder tb)
{
MethodWrapper mw = wrapper.GetMethodWrapper("readResolve", "()Ljava.lang.Object;", false);
if (mw != null && !wrapper.IsSubTypeOf(iobjectreference))
{
tb.AddInterfaceImplementation(JVM.Import(typeof(IObjectReference)));
MethodBuilder getRealObject = tb.DefineMethod("IObjectReference.GetRealObject", MethodAttributes.Private | MethodAttributes.Virtual | MethodAttributes.NewSlot | MethodAttributes.Final,
Types.Object, new Type[] { JVM.Import(typeof(StreamingContext)) });
getRealObject.SetCustomAttribute(securityCriticalAttribute);
AttributeHelper.HideFromJava(getRealObject);
tb.DefineMethodOverride(getRealObject, JVM.Import(typeof(IObjectReference)).GetMethod("GetRealObject"));
CodeEmitter ilgen = CodeEmitter.Create(getRealObject);
mw.Link();
if (!wrapper.IsFinal)
{
// readResolve is only applicable if it exists on the actual type of the object, so if we're a subclass don't call it
ilgen.Emit(OpCodes.Ldarg_0);
ilgen.Emit(OpCodes.Callvirt, Compiler.getTypeMethod);
ilgen.Emit(OpCodes.Ldtoken, wrapper.TypeAsBaseType);
ilgen.Emit(OpCodes.Call, Compiler.getTypeFromHandleMethod);
CodeEmitterLabel label = ilgen.DefineLabel();
ilgen.Emit(OpCodes.Beq_S, label);
ilgen.Emit(OpCodes.Ldarg_0);
ilgen.Emit(OpCodes.Ret);
ilgen.MarkLabel(label);
}
ilgen.Emit(OpCodes.Ldarg_0);
mw.EmitCall(ilgen);
ilgen.Emit(OpCodes.Ret);
ilgen.DoEmit();
}
}
internal CodeEmitterLabel DefineLabel()
{
CodeEmitterLabel label = new CodeEmitterLabel(ilgen_real.DefineLabel());
#if LABELCHECK
labels.Add(label, new System.Diagnostics.StackFrame(1, true));
#endif
return(label);
}
internal void MarkLabel(CodeEmitterLabel loc)
{
if (lazyBranch == loc)
{
lazyBranch = null;
}
LazyGen();
#if LABELCHECK
labels.Remove(loc);
#endif
ilgen_real.MarkLabel(loc.Label);
loc.Offset = GetILOffset();
}
internal void LazyEmit_if_le_lt_ge_gt(Comparison comp, CodeEmitterLabel label)
{
CmpExpr cmp = PeekStack() as CmpExpr;
if (cmp != null)
{
PopStack();
cmp.EmitBcc(this, comp, label);
}
else
{
Emit(OpCodes.Ldc_I4_0);
EmitBcc(comp, label);
}
}
// This is basically the same as Castclass, except that it
// throws an IncompatibleClassChangeError on failure.
internal void EmitAssertType(Type type)
{
LocalBuilder lb = DeclareLocal(Types.Object);
Emit(OpCodes.Stloc, lb);
Emit(OpCodes.Ldloc, lb);
Emit(OpCodes.Isinst, type);
Emit(OpCodes.Dup);
CodeEmitterLabel ok = DefineLabel();
Emit(OpCodes.Brtrue_S, ok);
Emit(OpCodes.Ldloc, lb);
Emit(OpCodes.Brfalse_S, ok); // handle null
EmitThrow("java.lang.IncompatibleClassChangeError");
MarkLabel(ok);
}
private void LazyGen()
{
if (lazyBranch != null)
{
#if !STATIC_COMPILER
offset += OpCodes.Br.Size + 4;
#endif
ilgen_real.Emit(OpCodes.Br, lazyBranch.Label);
lazyBranch = null;
}
int len = topOfStack;
topOfStack = 0;
for (int i = 0; i < len; i++)
{
stackArray[i].Emit(this);
}
}
private static void CreateStaticInitializer(TypeBuilder tb, List <ProxyMethod> methods)
{
ConstructorBuilder cb = tb.DefineConstructor(MethodAttributes.Static, CallingConventions.Standard, Type.EmptyTypes);
CodeEmitter ilgen = CodeEmitter.Create(cb);
CodeEmitterLocal callerID = ilgen.DeclareLocal([email protected]);
TypeBuilder tbCallerID = DynamicTypeWrapper.FinishContext.EmitCreateCallerID(tb, ilgen);
ilgen.Emit(OpCodes.Stloc, callerID);
// HACK we shouldn't create the nested type here (the outer type must be created first)
tbCallerID.CreateType();
ilgen.BeginExceptionBlock();
foreach (ProxyMethod method in methods)
{
method.mw.DeclaringType.EmitClassLiteral(ilgen);
ilgen.Emit(OpCodes.Ldstr, method.mw.Name);
TypeWrapper[] parameters = method.mw.GetParameters();
ilgen.Emit(OpCodes.Ldc_I4, parameters.Length);
ilgen.Emit(OpCodes.Newarr, CoreClasses.java.lang.Class.Wrapper.TypeAsArrayType);
for (int i = 0; i < parameters.Length; i++)
{
ilgen.Emit(OpCodes.Dup);
ilgen.Emit(OpCodes.Ldc_I4, i);
parameters[i].EmitClassLiteral(ilgen);
ilgen.Emit(OpCodes.Stelem_Ref);
}
if (javaLangClass_getMethod.HasCallerID)
{
ilgen.Emit(OpCodes.Ldloc, callerID);
}
javaLangClass_getMethod.EmitCallvirt(ilgen);
ilgen.Emit(OpCodes.Stsfld, method.fb);
}
CodeEmitterLabel label = ilgen.DefineLabel();
ilgen.Emit(OpCodes.Leave_S, label);
ilgen.BeginCatchBlock(javaLangNoSuchMethodException.TypeAsExceptionType);
javaLangThrowable_getMessage.EmitCallvirt(ilgen);
javaLangNoClassDefFoundErrorConstructor.EmitNewobj(ilgen);
ilgen.Emit(OpCodes.Throw);
ilgen.EndExceptionBlock();
ilgen.MarkLabel(label);
ilgen.Emit(OpCodes.Ret);
ilgen.DoEmit();
}
private void EmitBcc(Comparison comp, CodeEmitterLabel label)
{
switch (comp)
{
case Comparison.LessOrEqual:
Emit(OpCodes.Ble, label);
break;
case Comparison.LessThan:
Emit(OpCodes.Blt, label);
break;
case Comparison.GreaterOrEqual:
Emit(OpCodes.Bge, label);
break;
case Comparison.GreaterThan:
Emit(OpCodes.Bgt, label);
break;
}
}
private void LazyEmit_if_ne_eq(CodeEmitterLabel label, bool brtrue)
{
InstanceOfExpr instanceof = PeekStack() as InstanceOfExpr;
if (instanceof != null)
{
PopStack();
Emit(OpCodes.Isinst, instanceof.Type);
}
else
{
CmpExpr cmp = PeekStack() as CmpExpr;
if (cmp != null)
{
PopStack();
Emit(brtrue ? OpCodes.Bne_Un : OpCodes.Beq, label);
return;
}
}
Emit(brtrue ? OpCodes.Brtrue : OpCodes.Brfalse, label);
}
internal void EmitCastclass(Type type)
{
if (verboseCastFailure != null)
{
LocalBuilder lb = DeclareLocal(Types.Object);
Emit(OpCodes.Stloc, lb);
Emit(OpCodes.Ldloc, lb);
Emit(OpCodes.Isinst, type);
Emit(OpCodes.Dup);
CodeEmitterLabel ok = DefineLabel();
Emit(OpCodes.Brtrue_S, ok);
Emit(OpCodes.Ldloc, lb);
Emit(OpCodes.Brfalse_S, ok); // handle null
Emit(OpCodes.Ldtoken, type);
Emit(OpCodes.Ldloc, lb);
Emit(OpCodes.Call, verboseCastFailure);
MarkLabel(ok);
}
else
{
Emit(OpCodes.Castclass, type);
}
}
internal void EmitBeq(CodeEmitterLabel label)
{
EmitOpCode(OpCodes.Beq, label);
}
internal CodeEmitterLabel DefineLabel()
{
CodeEmitterLabel label = new CodeEmitterLabel(ilgen_real.DefineLabel());
#if LABELCHECK
labels.Add(label, new System.Diagnostics.StackFrame(1, true));
#endif
return label;
}
private bool HasBranchTo(int start, int end, CodeEmitterLabel label)
{
for (int i = start; i < end; i++)
{
if (code[i].HasLabel)
{
if (code[i].Label == label)
{
return true;
}
}
else if (code[i].opcode == OpCodes.Switch)
{
foreach (CodeEmitterLabel swlbl in code[i].Labels)
{
if (swlbl == label)
{
return true;
}
}
}
}
return false;
}
private int FindLabel(CodeEmitterLabel label)
{
for (int i = 0; i < code.Count; i++)
{
if (code[i].pseudo == CodeType.Label && code[i].Label == label)
{
return i;
}
}
throw new InvalidOperationException();
}
internal sealed override void EmitBcc(CodeEmitter ilgen, Comparison comp, CodeEmitterLabel label)
{
ilgen.EmitBcc(comp, label);
}
internal void Emit_if_le_lt_ge_gt(Comparison comp, CodeEmitterLabel label)
{
// don't change this Ldc_I4_0 to Ldc_I4(0) because the optimizer recognizes
// only this specific pattern
Emit(OpCodes.Ldc_I4_0);
switch (comp)
{
case Comparison.LessOrEqual:
EmitBle(label);
break;
case Comparison.LessThan:
EmitBlt(label);
break;
case Comparison.GreaterOrEqual:
EmitBge(label);
break;
case Comparison.GreaterThan:
EmitBgt(label);
break;
}
}
internal abstract void EmitBcc(CodeEmitter ilgen, Comparison comp, CodeEmitterLabel label);
internal void EmitBrfalse(CodeEmitterLabel label)
{
EmitOpCode(OpCodes.Brfalse, label);
}
internal void EmitBgt(CodeEmitterLabel label)
{
EmitOpCode(OpCodes.Bgt, label);
}
internal void LazyEmit_ifne(CodeEmitterLabel label)
{
LazyEmit_if_ne_eq(label, true);
}
internal void LazyEmit_ifeq(CodeEmitterLabel label)
{
LazyEmit_if_ne_eq(label, false);
}
internal override void Emit(CodeEmitter ilgen, CodeEmitterLabel label)
{
ilgen.EmitBrtrue(label);
}
internal void Emit(OpCode opcode, CodeEmitterLabel label)
{
int currOffset = GetILOffset();
if (label.Offset == -1)
{
if (opcode.Value == OpCodes.Br.Value)
{
lazyBranch = label;
return;
}
}
else if (currOffset - label.Offset < 126)
{
if (opcode.Value == OpCodes.Brtrue.Value)
{
opcode = OpCodes.Brtrue_S;
}
else if (opcode.Value == OpCodes.Brfalse.Value)
{
opcode = OpCodes.Brfalse_S;
}
else if (opcode.Value == OpCodes.Br.Value)
{
opcode = OpCodes.Br_S;
}
else if (opcode.Value == OpCodes.Beq.Value)
{
opcode = OpCodes.Beq_S;
}
else if (opcode.Value == OpCodes.Bne_Un.Value)
{
opcode = OpCodes.Bne_Un_S;
}
else if (opcode.Value == OpCodes.Ble.Value)
{
opcode = OpCodes.Ble_S;
}
else if (opcode.Value == OpCodes.Blt.Value)
{
opcode = OpCodes.Blt_S;
}
else if (opcode.Value == OpCodes.Bge.Value)
{
opcode = OpCodes.Bge_S;
}
else if (opcode.Value == OpCodes.Bgt.Value)
{
opcode = OpCodes.Bgt_S;
}
}
#if !STATIC_COMPILER
switch (opcode.OperandType)
{
case OperandType.InlineBrTarget:
offset += opcode.Size + 4;
break;
case OperandType.ShortInlineBrTarget:
offset += opcode.Size + 1;
break;
default:
throw new NotImplementedException();
}
#endif
ilgen_real.Emit(opcode, label.Label);
}
internal void EmitBge_Un(CodeEmitterLabel label)
{
EmitOpCode(OpCodes.Bge_Un, label);
}
internal void EmitBle(CodeEmitterLabel label)
{
EmitOpCode(OpCodes.Ble, label);
}
internal void EmitSwitch(CodeEmitterLabel[] labels)
{
EmitOpCode(OpCodes.Switch, labels);
}
internal void EmitBrtrue(CodeEmitterLabel label)
{
EmitOpCode(OpCodes.Brtrue, label);
}
internal abstract void Emit(CodeEmitter ilgen, CodeEmitterLabel label);
internal void EmitLeave(CodeEmitterLabel label)
{
EmitOpCode(OpCodes.Leave, label);
}
private static void CreateMethod(CompilerClassLoader loader, TypeBuilder tb, ProxyMethod pm)
{
MethodBuilder mb = pm.mw.GetDefineMethodHelper().DefineMethod(loader.GetTypeWrapperFactory(), tb, pm.mw.Name, MethodAttributes.Public | MethodAttributes.Virtual | MethodAttributes.Final);
List <string> exceptions = new List <string>();
foreach (TypeWrapper tw in pm.exceptions)
{
exceptions.Add(tw.Name);
}
AttributeHelper.SetThrowsAttribute(mb, exceptions.ToArray());
CodeEmitter ilgen = CodeEmitter.Create(mb);
ilgen.BeginExceptionBlock();
ilgen.Emit(OpCodes.Ldarg_0);
invocationHandlerField.EmitGet(ilgen);
ilgen.Emit(OpCodes.Ldarg_0);
ilgen.Emit(OpCodes.Ldsfld, pm.fb);
TypeWrapper[] parameters = pm.mw.GetParameters();
if (parameters.Length == 0)
{
ilgen.Emit(OpCodes.Ldnull);
}
else
{
ilgen.EmitLdc_I4(parameters.Length);
ilgen.Emit(OpCodes.Newarr, Types.Object);
for (int i = 0; i < parameters.Length; i++)
{
ilgen.Emit(OpCodes.Dup);
ilgen.EmitLdc_I4(i);
ilgen.EmitLdarg(i);
if (parameters[i].IsNonPrimitiveValueType)
{
parameters[i].EmitBox(ilgen);
}
else if (parameters[i].IsPrimitive)
{
Boxer.EmitBox(ilgen, parameters[i]);
}
ilgen.Emit(OpCodes.Stelem_Ref);
}
}
invokeMethod.EmitCallvirt(ilgen);
TypeWrapper returnType = pm.mw.ReturnType;
CodeEmitterLocal returnValue = null;
if (returnType != PrimitiveTypeWrapper.VOID)
{
returnValue = ilgen.DeclareLocal(returnType.TypeAsSignatureType);
if (returnType.IsNonPrimitiveValueType)
{
returnType.EmitUnbox(ilgen);
}
else if (returnType.IsPrimitive)
{
Boxer.EmitUnbox(ilgen, returnType);
}
else if (returnType != CoreClasses.java.lang.Object.Wrapper)
{
ilgen.EmitCastclass(returnType.TypeAsSignatureType);
}
ilgen.Emit(OpCodes.Stloc, returnValue);
}
CodeEmitterLabel returnLabel = ilgen.DefineLabel();
ilgen.EmitLeave(returnLabel);
// TODO consider using a filter here (but we would need to add filter support to CodeEmitter)
ilgen.BeginCatchBlock(Types.Exception);
ilgen.EmitLdc_I4(0);
ilgen.Emit(OpCodes.Call, ByteCodeHelperMethods.mapException.MakeGenericMethod(Types.Exception));
CodeEmitterLocal exception = ilgen.DeclareLocal(Types.Exception);
ilgen.Emit(OpCodes.Stloc, exception);
CodeEmitterLabel rethrow = ilgen.DefineLabel();
ilgen.Emit(OpCodes.Ldloc, exception);
errorClass.EmitInstanceOf(ilgen);
ilgen.EmitBrtrue(rethrow);
ilgen.Emit(OpCodes.Ldloc, exception);
runtimeExceptionClass.EmitInstanceOf(ilgen);
ilgen.EmitBrtrue(rethrow);
foreach (TypeWrapper tw in pm.exceptions)
{
ilgen.Emit(OpCodes.Ldloc, exception);
tw.EmitInstanceOf(ilgen);
ilgen.EmitBrtrue(rethrow);
}
ilgen.Emit(OpCodes.Ldloc, exception);
undeclaredThrowableExceptionConstructor.EmitNewobj(ilgen);
ilgen.Emit(OpCodes.Throw);
ilgen.MarkLabel(rethrow);
ilgen.Emit(OpCodes.Rethrow);
ilgen.EndExceptionBlock();
ilgen.MarkLabel(returnLabel);
if (returnValue != null)
{
ilgen.Emit(OpCodes.Ldloc, returnValue);
}
ilgen.Emit(OpCodes.Ret);
ilgen.DoEmit();
}
internal void MarkLabel(CodeEmitterLabel loc)
{
#if LABELCHECK
labels.Remove(loc);
#endif
EmitPseudoOpCode(CodeType.Label, loc);
}
internal void Emit(OpCode opcode, CodeEmitterLabel label)
{
EmitOpCode(opcode, label);
}
internal void Emit(OpCode opcode, CodeEmitterLabel[] labels)
{
EmitOpCode(opcode, labels);
}
internal sealed override void EmitBcc(CodeEmitter ilgen, Comparison comp, CodeEmitterLabel label)
{
switch (comp)
{
case Comparison.LessOrEqual:
ilgen.Emit(OpCodes.Ble, label);
break;
case Comparison.LessThan:
ilgen.Emit(OpCodes.Blt, label);
break;
case Comparison.GreaterOrEqual:
ilgen.Emit(OpCodes.Bge_Un, label);
break;
case Comparison.GreaterThan:
ilgen.Emit(OpCodes.Bgt_Un, label);
break;
}
}
