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Correctly initialize Data field accessors #9253

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84538f1
Use prepared accessors to retrieve Data fields
headius Feb 18, 2026
73b2a99
Copy variable table manager from non-Object parents
headius Feb 18, 2026
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15 changes: 9 additions & 6 deletions core/src/main/java/org/jruby/RubyClass.java
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Original file line number Diff line number Diff line change
Expand Up @@ -542,6 +542,7 @@ public static RubyClass newClass(Ruby runtime, RubyClass superClass, String name
return newClass(runtime.getCurrentContext(), superClass, name, allocator, parent, setParent, file, line);
}

@Deprecated
public static RubyClass newClass(ThreadContext context, RubyClass superClass, String name, ObjectAllocator allocator,
RubyModule parent, boolean setParent, String file, int line) {
assert superClass != null;
Expand All @@ -550,7 +551,6 @@ public static RubyClass newClass(ThreadContext context, RubyClass superClass, St
baseName(name);
clazz.makeMetaClass(context, superClass.getMetaClass());
if (setParent) clazz.setParent(parent);
clazz.copyVariableTableManagerForData(context, superClass);
parent.setConstant(context, name, clazz, file, line);
superClass.invokeInherited(context, superClass, clazz);
return clazz;
Expand Down Expand Up @@ -1073,7 +1073,7 @@ private RubyClass initializeCommon(ThreadContext context, RubyClass superClazz,
allocator = superClazz.allocator;
makeMetaClass(context, superClazz.getMetaClass());
superClazz.addSubclass(this);
copyVariableTableManagerForData(context, superClazz);
copyVariableTableManager(superClazz);

marshal = superClazz.marshal;

Expand All @@ -1083,11 +1083,14 @@ private RubyClass initializeCommon(ThreadContext context, RubyClass superClazz,
return this;
}

private void copyVariableTableManagerForData(ThreadContext context, RubyClass superClazz) {
private void copyVariableTableManager(RubyClass superClazz) {
if (superClazz == runtime.getObject()) {
// don't copy variables from Object since it will accumulate random variables
return;
}
VariableTableManager variableTableManager = superClazz.getVariableTableManager();
if (variableTableManager.getRealClass().superClass() == context.runtime.getData()) {
// duplicate data's variable table in subclasses
this.variableTableManager = variableTableManager.duplicateForData(this);
if (!variableTableManager.getVariableAccessorsForRead().isEmpty()) {
this.variableTableManager = variableTableManager.duplicateFor(this);
}
}

Expand Down
27 changes: 13 additions & 14 deletions core/src/main/java/org/jruby/RubyData.java
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Expand Up @@ -123,7 +123,7 @@ public static void initialize(ThreadContext context, IRubyObject self, IRubyObje
String keyString = toSymbol(context, k).idString();
VariableAccessor variableAccessor = variableAccessors.get(keyString);
if (variableAccessor != null) {
selfObj.setInternalVariable(keyString, v);
variableAccessor.set(self, v);
} else {
RubyArray unknownKeywords = unknownKeywordsPtr[0];
if (unknownKeywords == null) {
Expand Down Expand Up @@ -402,13 +402,6 @@ private static RubyClass newDataStruct(ThreadContext context, RubyClass superCla

RubyClass subclass = RubyClass.newClass(runtime, superClass);

VariableTableManager vtm = subclass.getVariableTableManager();
VariableAccessor[] accessors = new VariableAccessor[keySet.size()];
int i = 0;
for (RubySymbol sym : keySet) {
accessors[i++] = vtm.getVariableAccessorForWrite(sym.idString());
}

ObjectAllocator allocator =
runtime.getObjectSpecializer()
.specializeForVariables(
Expand All @@ -417,6 +410,18 @@ private static RubyClass newDataStruct(ThreadContext context, RubyClass superCla

subclass.allocator(allocator);

VariableTableManager vtm = subclass.getVariableTableManager();
VariableAccessor[] accessors = new VariableAccessor[keySet.size()];
int i = 0;
for (RubySymbol sym : keySet) {
VariableAccessor accessor = vtm.getVariableAccessorForWrite(sym.idString());

accessors[i++] = accessor;

// TODO: AttrReader expects to potentially see many variable tables; this could be simplified
subclass.addMethod(context, sym.idString(), new AttrReaderMethod(subclass, Visibility.PUBLIC, accessor));
}

RubyArray members = newArray(context, keySet);
members.freeze(context);
subclass.setInternalVariable(MEMBERS_KEY, members);
Expand All @@ -427,12 +432,6 @@ private static RubyClass newDataStruct(ThreadContext context, RubyClass superCla
dataSClass.undefMethods(context, "define")
.defineMethods(context, DataMethods.class);

for (RubySymbol sym : keySet) {
VariableAccessor accessor = vtm.getVariableAccessorForWrite(sym.idString());
// TODO: AttrReader expects to potentially see many variable tables; this could be simplified
subclass.addMethod(context, sym.idString(), new AttrReaderMethod(subclass, Visibility.PUBLIC, accessor));
}

return subclass;
}

Expand Down
2 changes: 1 addition & 1 deletion core/src/main/java/org/jruby/runtime/ivars/VariableTableManager.java
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Expand Up @@ -545,7 +545,7 @@ public Object clearVariable(RubyBasicObject object, String name) {
}
}

public VariableTableManager duplicateForData(RubyClass newRealClass) {
public VariableTableManager duplicateFor(RubyClass newRealClass) {
return new VariableTableManager(this, newRealClass);
}

Expand Down
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