Providing a Java agent to check that ASM classes are correctly used?

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By design, the ASM core and tree packages do not check that their methods are correctly used, in order to get the best possible performance. Instead, some checks are provided in the util package, by the Check...Adapter classes. The drawback is that, to benefit from these checks, one must manually and explicitly insert Check...Adapter instances in class generator and adapter chains. And it is not always easy to do this only for unit tests, or conditionally at runtime, etc. Also, inserting intermediate adapters is not fully transparent in some cases.

Hence the idea of providing these checks via a Java agent, which could be used only for unit tests, or with the real code, when needed for debugging purposes, etc. This agent would instrument the ASM classes (both the ones provided by the framework, and those provided by the user) in order to insert code checking pre and post conditions (delegating to Check...Adapter when possible).

Do you think this would be useful for you? If yes, we could work on that.

Eric

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