Fix Method#super_method for aliased methods #3458
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Previously, Method#super_method looked at the called_id to determine the method id to use, but that isn't correct for aliased methods, because the super target depends on the original method id, not the called_id. Additionally, aliases can reference methods defined in other classes and modules, and super lookup needs to start in the super of the defined class in such cases. This adds tests for Method#super_method for both types of aliases, one that uses VM_METHOD_TYPE_ALIAS and another that does not. Both check that the results for calling super methods return the expected values. To find the defined class for alias methods, add an rb_ prefix to find_defined_class_by_owner in vm_insnhelper.c and make it non-static, so that it can be called from method_super_method in proc.c. This bug was original discovered while researching [Bug ruby#11189]. Fixes [Bug #17130]
Should hopefully fix JIT issues with VS 2015.
nobu approved these changes Aug 27, 2020
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Previously, Method#super_method looked at the called_id to
determine the method id to use, but that isn't correct for
aliased methods, because the super target depends on the
original method id, not the called_id.
Additionally, aliases can reference methods defined in other
classes and modules, and super lookup needs to start in the
super of the defined class in such cases.
This adds tests for Method#super_method for both types of
aliases, one that uses VM_METHOD_TYPE_ALIAS and another that
does not. Both check that the results for calling super
methods return the expected values.
To find the defined class for alias methods, add an rb_ prefix
to find_defined_class_by_owner in vm_insnhelper.c and make it
non-static, so that it can be called from method_super_method
in proc.c.
This bug was original discovered while researching [Bug #11189].
Fixes [Bug #17130]