2013/10/6 Josef Weidendorfer
> Am 04.10.2013 21:47, schrieb Sonny Tavernier:
> > Hi,
> > I have an unexpected behavior with a basic tool.
> > For each Put statement of a basic block, I register a dirty helper using
> > unsafeIRDirty_0_N.
> > The problem is that the dirty helper is called more times than expected,
> > e.g. there are 5 Put statements in a basic block but the dirty helper is
> > called 13 times.
> You seem to confuse instrumentation vs. execution time.
> As you set the counters to zero only at instrumentation time, of course
> they will diverge when a BB is executed a second time (as every BB is
> instrumented only once).
> Further, Valgrind works on super blocks (SBs), not just BBs.
> A SB may have multiple side exits. Thus, counters may be
> different whenever the execution flow exits an SB early.
Thank you for your useful answer Josef.
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