public static CallSite ivar(Lookup lookup, String name, MethodType type) throws Throwable {
String[] names = name.split(":");
String operation = names[0];
String varName = names[1];
VariableSite site = new VariableSite(type, varName, "noname", 0);
MethodHandle handle;
handle =
lookup.findStatic(
Bootstrap.class, operation, type.insertParameterTypes(0, VariableSite.class));
handle = handle.bindTo(site);
site.setTarget(handle.asType(site.type()));
return site;
}
public static void ivarSet(VariableSite site, IRubyObject self, IRubyObject value)
throws Throwable {
RubyClass realClass = self.getMetaClass().getRealClass();
VariableAccessor accessor = realClass.getVariableAccessorForWrite(site.name());
// set variable value and fold by returning value
MethodHandle setValue;
boolean direct = false;
if (accessor instanceof FieldVariableAccessor) {
direct = true;
int offset = ((FieldVariableAccessor) accessor).getOffset();
Class cls = REIFIED_OBJECT_CLASSES[offset];
setValue = findStatic(cls, "setVariableChecked", methodType(void.class, cls, Object.class));
setValue =
explicitCastArguments(
setValue, methodType(void.class, IRubyObject.class, IRubyObject.class));
} else {
setValue =
findStatic(
accessor.getClass(),
"setVariableChecked",
methodType(
void.class, RubyBasicObject.class, RubyClass.class, int.class, Object.class));
setValue =
explicitCastArguments(
setValue,
methodType(
void.class, IRubyObject.class, RubyClass.class, int.class, IRubyObject.class));
setValue = insertArguments(setValue, 1, realClass, accessor.getIndex());
}
// prepare fallback
MethodHandle fallback = null;
if (site.chainCount() + 1 > Options.INVOKEDYNAMIC_MAXPOLY.load()) {
if (Options.INVOKEDYNAMIC_LOG_BINDING.load())
LOG.info(
site.name()
+ "\tset on type "
+ self.getMetaClass().id
+ " failed (polymorphic)"
+ extractSourceInfo(site));
fallback =
findStatic(
Bootstrap.class,
"ivarSetFail",
methodType(void.class, VariableSite.class, IRubyObject.class, IRubyObject.class));
fallback = fallback.bindTo(site);
site.setTarget(fallback);
fallback.invokeExact(self, value);
} else {
if (Options.INVOKEDYNAMIC_LOG_BINDING.load()) {
if (direct) {
LOG.info(
site.name()
+ "\tset field on type "
+ self.getMetaClass().id
+ " added to PIC"
+ extractSourceInfo(site));
} else {
LOG.info(
site.name()
+ "\tset on type "
+ self.getMetaClass().id
+ " added to PIC"
+ extractSourceInfo(site));
}
}
fallback = site.getTarget();
site.incrementChainCount();
}
// prepare test
MethodHandle test =
findStatic(
InvocationLinker.class,
"testRealClass",
methodType(boolean.class, int.class, IRubyObject.class));
test = insertArguments(test, 0, accessor.getClassId());
test = dropArguments(test, 1, IRubyObject.class);
setValue = guardWithTest(test, setValue, fallback);
if (Options.INVOKEDYNAMIC_LOG_BINDING.load())
LOG.info(
site.name()
+ "\tset on class "
+ self.getMetaClass().id
+ " bound directly"
+ extractSourceInfo(site));
site.setTarget(setValue);
setValue.invokeExact(self, value);
}
public static IRubyObject ivarGet(VariableSite site, IRubyObject self) throws Throwable {
RubyClass realClass = self.getMetaClass().getRealClass();
VariableAccessor accessor = realClass.getVariableAccessorForRead(site.name());
// produce nil if the variable has not been initialize
MethodHandle nullToNil =
findStatic(
Helpers.class,
"nullToNil",
methodType(IRubyObject.class, IRubyObject.class, IRubyObject.class));
nullToNil = insertArguments(nullToNil, 1, self.getRuntime().getNil());
nullToNil = explicitCastArguments(nullToNil, methodType(IRubyObject.class, Object.class));
// get variable value and filter with nullToNil
MethodHandle getValue;
boolean direct = false;
if (accessor instanceof FieldVariableAccessor) {
direct = true;
int offset = ((FieldVariableAccessor) accessor).getOffset();
Class cls = REIFIED_OBJECT_CLASSES[offset];
getValue = lookup().findGetter(cls, "var" + offset, Object.class);
getValue = explicitCastArguments(getValue, methodType(Object.class, IRubyObject.class));
} else {
getValue =
findStatic(
VariableAccessor.class,
"getVariable",
methodType(Object.class, RubyBasicObject.class, int.class));
getValue =
explicitCastArguments(getValue, methodType(Object.class, IRubyObject.class, int.class));
getValue = insertArguments(getValue, 1, accessor.getIndex());
}
getValue = filterReturnValue(getValue, nullToNil);
// prepare fallback
MethodHandle fallback = null;
if (site.chainCount() + 1 > Options.INVOKEDYNAMIC_MAXPOLY.load()) {
if (Options.INVOKEDYNAMIC_LOG_BINDING.load())
LOG.info(
site.name()
+ "\tqet on type "
+ self.getMetaClass().id
+ " failed (polymorphic)"
+ extractSourceInfo(site));
fallback =
findStatic(
Bootstrap.class,
"ivarGetFail",
methodType(IRubyObject.class, VariableSite.class, IRubyObject.class));
fallback = fallback.bindTo(site);
site.setTarget(fallback);
return (IRubyObject) fallback.invokeWithArguments(self);
} else {
if (Options.INVOKEDYNAMIC_LOG_BINDING.load()) {
if (direct) {
LOG.info(
site.name()
+ "\tget field on type "
+ self.getMetaClass().id
+ " added to PIC"
+ extractSourceInfo(site));
} else {
LOG.info(
site.name()
+ "\tget on type "
+ self.getMetaClass().id
+ " added to PIC"
+ extractSourceInfo(site));
}
}
fallback = site.getTarget();
site.incrementChainCount();
}
// prepare test
MethodHandle test =
findStatic(
InvocationLinker.class,
"testRealClass",
methodType(boolean.class, int.class, IRubyObject.class));
test = insertArguments(test, 0, accessor.getClassId());
getValue = guardWithTest(test, getValue, fallback);
if (Options.INVOKEDYNAMIC_LOG_BINDING.load())
LOG.info(
site.name()
+ "\tget on class "
+ self.getMetaClass().id
+ " bound directly"
+ extractSourceInfo(site));
site.setTarget(getValue);
return (IRubyObject) getValue.invokeExact(self);
}