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Gabriel Schulhof
d5b397c9b6
Use a stronger criterion to identify objects in the prototype chain that store pointers to native data that were added by previous calls to `napi_wrap()`. Whereas the old criterion for identifying `napi_wrap()`-injected prototype chain objects was to consider an object with an internal field count of 1 to be such an object, the new criterion is to consider an object with an internal field count of 2 such that the second field holds a `v8::External` which itself contains a pointer to a global static string unique to N-API to be a `napi_wrap()`-injected prototype chain object. This greatly reduces the possibility of returning a pointer that was not previously added with `napi_wrap()`, and it allows us to recognize that an object has already undergone `napi_wrap()` and we can thus prevent a chain of wrappers only the first of which is accessible from appearing in the prototype chain, as would be the result of multiple calls to `napi_wrap()` using the same object. PR-URL: https://github.com/nodejs/node/pull/13872 Reviewed-By: James M Snell <jasnell@gmail.com> Reviewed-By: Michael Dawson <michael_dawson@ca.ibm.com> Reviewed-By: Timothy Gu <timothygu99@gmail.com>