interp: improve handling of methods defined on interfaces #1516
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For methods defined on interfaces (vs concrete methods), the resolution of the method is necessarily delayed at the run time and can not be completed at compile time. The selectorExpr processing has been changed to correctly identify calls on interface methods which were confused as fields rather than methods (due to the fact that in a interface definition, methods are fields of the interface). Then at runtime, method lookup has been fixed to correctly recurse in nested valueInterface wrappers and to find embedded interface fields in case of struct or pointer to structs. Fixes traefik#1515.
The receiver is already processed at method resolution and in genFunctionWrapper. Removing redundant processing in call fixes handling of variadic method, simplifies the code and makes it faster. With this commit, it is now possible to run coraza-waf plugin in traefik.
mpl
reviewed
Mar 1, 2023
mpl
reviewed
Mar 1, 2023
mpl
reviewed
Mar 2, 2023
mpl
reviewed
Mar 2, 2023
Co-authored-by: mpl <[email protected]>
Co-authored-by: mpl <[email protected]>
Co-authored-by: mpl <[email protected]>
mpl
reviewed
Mar 6, 2023
Co-authored-by: mpl <[email protected]>
Co-authored-by: mpl <[email protected]>
mpl
approved these changes
Mar 6, 2023
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For methods defined on interfaces (vs concrete methods), the resolution of the method is necessarily delayed at the run time and can not be completed at compile time.
The selectorExpr processing has been changed to correctly identify calls on interface methods which were confused as fields rather than methods (due to the fact that in a interface definition, methods are fields of the interface).
Then at runtime, method lookup has been fixed to correctly recurse in nested valueInterface wrappers and to find embedded interface fields in case of struct or pointer to struct.
Finally, remove receiver processing in
call().The receiver is already processed at method resolution and in genFunctionWrapper. Removing redundant processing in call fixes handling of variadic method, simplifies the code and makes it faster.With those fixes, it is now possible to load and run
go.uber.org/zapin yaegi. In turn, it makes possible for yaegi to run plugins dependent on zap, such as coraza-waf.Fixes #1515,
Fixes #1172,
Fixes #1275,
Fixes #1485.