In JavaScriptCore, when creating and manipulating classes and prototypes, the JSObjectGetPrototype function is used to retrieve the prototype of an object.

Problem:
I’ve encountered a situation where JSObjectGetPrototype always returns the same JSValueRef for different classes, even though I am creating distinct prototypes for each class.

• I create multiple classes, each with its own unique prototype.
• When I use JSObjectGetPrototype to retrieve the prototype of different instances, I receive the same JSValueRef for all of them, suggesting that the prototype is not unique as expected.

What I Tried:

1. Creating Unique Prototypes:

   • I used JSObjectMake to create new objects as prototypes for different classes.
   • I then called JSObjectSetPrototype to set these prototypes for the respective constructors.

2. Retrieving and Logging Prototypes:

   • I used JSObjectGetPrototype to retrieve the prototype for each class instance.
   • I logged the addresses of the prototypes to verify their uniqueness.

3. Logging and Comparison:

   • I compared the addresses of the prototypes retrieved for different classes to check if they were unique.

What I Expected:

1. Unique Prototypes:

   • I expected that each class would have its own unique prototype.
   • The addresses retrieved by JSObjectGetPrototype for different classes should be distinct.

2. Access to Methods:

   • I anticipated that methods added to the prototypes would be accessible when interacting with instances of these classes.

Outcome:

• Despite setting different prototypes for each class, JSObjectGetPrototype returned the same JSValueRef for all classes.
• This suggests that the prototypes are not being set or managed correctly, resulting in all classes sharing the same prototype.

Questions:

1. Is there a known issue or limitation with JSObjectGetPrototype returning the same value for all classes?
2. How can I ensure that prototypes are correctly assigned and are unique for each class?
3. Are there any additional steps or considerations to manage prototypes effectively in JavaScriptCore?