Capturing the first invocation of a method

[Harry Yale]

Hi,
How can I capture the moment of the very first invocation of every Java
method?

I have tried the following approach:

In InterpreterGenerator::generate_counter_incr(), I look for the counter
value 1 (actually 8 (1 << 3) because the lowest 3 bits are used for other
purposes)
and if so jump to a function in InterpreterRuntime (like
InterpreterRuntime::frequency_counter_overflow()) which prints the name of
the method.

but I haven't been able to see the first invocation of non-native Java
methods. Non-native Java methods seem to have a much larger counter value by
the time I capture them in the above function.

Am I missing another invocation path or is there a better approach?

Thanks.
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