/**
* Create a LF which can access the given field. Cache and share this structure among all fields
* with the same basicType and refKind.
*/
private static LambdaForm preparedFieldLambdaForm(MemberName m) {
Class<?> ftype = m.getFieldType();
boolean isVolatile = m.isVolatile();
byte formOp;
switch (m.getReferenceKind()) {
case REF_getField:
formOp = AF_GETFIELD;
break;
case REF_putField:
formOp = AF_PUTFIELD;
break;
case REF_getStatic:
formOp = AF_GETSTATIC;
break;
case REF_putStatic:
formOp = AF_PUTSTATIC;
break;
default:
throw new InternalError(m.toString());
}
if (shouldBeInitialized(m)) {
// precompute the barrier-free version:
preparedFieldLambdaForm(formOp, isVolatile, ftype);
assert ((AF_GETSTATIC_INIT - AF_GETSTATIC) == (AF_PUTSTATIC_INIT - AF_PUTSTATIC));
formOp += (AF_GETSTATIC_INIT - AF_GETSTATIC);
}
LambdaForm lform = preparedFieldLambdaForm(formOp, isVolatile, ftype);
maybeCompile(lform, m);
assert (lform.methodType().dropParameterTypes(0, 1).equals(m.getInvocationType().basicType()))
: Arrays.asList(m, m.getInvocationType().basicType(), lform, lform.methodType());
return lform;
}
// Factory methods:
static DirectMethodHandle make(byte refKind, Class<?> receiver, MemberName member) {
MethodType mtype = member.getMethodOrFieldType();
if (!member.isStatic()) {
if (!member.getDeclaringClass().isAssignableFrom(receiver) || member.isConstructor())
throw new InternalError(member.toString());
mtype = mtype.insertParameterTypes(0, receiver);
}
if (!member.isField()) {
if (refKind == REF_invokeSpecial) {
member = member.asSpecial();
LambdaForm lform = preparedLambdaForm(member);
return new Special(mtype, lform, member);
} else {
LambdaForm lform = preparedLambdaForm(member);
return new DirectMethodHandle(mtype, lform, member);
}
} else {
LambdaForm lform = preparedFieldLambdaForm(member);
if (member.isStatic()) {
long offset = MethodHandleNatives.staticFieldOffset(member);
Object base = MethodHandleNatives.staticFieldBase(member);
return new StaticAccessor(mtype, lform, member, base, offset);
} else {
long offset = MethodHandleNatives.objectFieldOffset(member);
assert (offset == (int) offset);
return new Accessor(mtype, lform, member, (int) offset);
}
}
}
/**
* Create a LF which can invoke the given method. Cache and share this structure among all methods
* with the same basicType and refKind.
*/
private static LambdaForm preparedLambdaForm(MemberName m) {
assert (m.isInvocable()) : m; // call preparedFieldLambdaForm instead
MethodType mtype = m.getInvocationType().basicType();
assert (!m.isMethodHandleInvoke()) : m;
int which;
switch (m.getReferenceKind()) {
case REF_invokeVirtual:
which = LF_INVVIRTUAL;
break;
case REF_invokeStatic:
which = LF_INVSTATIC;
break;
case REF_invokeSpecial:
which = LF_INVSPECIAL;
break;
case REF_invokeInterface:
which = LF_INVINTERFACE;
break;
case REF_newInvokeSpecial:
which = LF_NEWINVSPECIAL;
break;
default:
throw new InternalError(m.toString());
}
if (which == LF_INVSTATIC && shouldBeInitialized(m)) {
// precompute the barrier-free version:
preparedLambdaForm(mtype, which);
which = LF_INVSTATIC_INIT;
}
LambdaForm lform = preparedLambdaForm(mtype, which);
maybeCompile(lform, m);
assert (lform.methodType().dropParameterTypes(0, 1).equals(m.getInvocationType().basicType()))
: Arrays.asList(m, m.getInvocationType().basicType(), lform, lform.methodType());
return lform;
}