On Fri, Oct 21, 2022 at 10:12 AM Steven Rostedt <rostedt@xxxxxxxxxxx> wrote: > > On Fri, 21 Oct 2022 09:43:14 +0800 > richard clark <richard.xnu.clark@xxxxxxxxx> wrote: > > > > Ah, as you can see that I did it, but the result is not what I > > expected :-). Help? > > Looking at the code, I see it does indeed only look at builtin tracepoints. What the logic behind is not to implement a function like 'for_each_tracepoints' instead of 'for_each_kernel_tracepoint' to find all the TPs defined by both builtin kernel and external kernel modules, just like we can find all the kernel symbols and exported symbols from external module? > > But if you want one module to have access to the tracepoints of another, > then you can have the first one export it. > > EXPORT_SYMBOL_TRACEPOINT_GPL(function_event_a); > > And then module b should have access to it. > Yes, but module b needs to register a new probe call back function for the new TPs defined by module a in my case, so first it needs to find the TPs defined by module a. Any comments? > -- Steve
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