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From: Chet Murthy <murthy.chet@gmail.com>
To: caml-list@inria.fr
Cc: Francois Berenger <berenger@riken.jp>
Date: Thu, 11 Apr 2013 00:17:51 -0700
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Subject: Re: [Caml-list] try...finally , threads, stack-tracebacks .... in
 ocaml


> Isn't there a way to "trace" locking and unlocking of locks?
> 
> So that you can do a post-mortem analysis of what went wrong.

Sure.  But you'd need more locks to manage that, yes?  And
furthermore, the problem (in the case I was debugging, and many times
in my times debugging java apps) is that somebody -didn't- put locking
in plcae (e.g., java.util.NumberFormat isn't thread-safe, and yet
people will create static instances and use 'em from multiple threads,
yielding "interesting" results).

But really that's immaterial.  You can't use tracing to find
timing-related issues, b/c the trace changes the timing.

> What is the ZAM?

Sorry, the original name for the Ocaml VM was the Zinc Abstract
Machine (from Xavier's original paper).

--chet--