Slide 10

Because of inheritance and pass-through, all attaches are intercepted. If an attach designates a program that is not a target program, it still is setup for trap processing. This is required so that TDF can pass-through any traps that may be set in shared code and so that TDF can intercept a designated program that may be attached by this program. In other words, if TASK A attaches TASK B which attaches TASK C, you can intercept TASK C by designating it as a target program without designating TASK A or B. This video was shown in the description for diagnosis with no boundaries, if you haven’t seen it, it demonstrates inheritance well.

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