On Apr 27, 2005, at 1:10 AM, Bradley Lucier wrote:

On Apr 26, 2005, at 10:25 PM, Bradley Lucier wrote:

...

I'm trying to use your profiler as a test coverage tool; is there any way to make the intervals between when samples are taken are made very small?

Scratch that thought; instead, would it be easy to write a coverage tool that is a modified version of your profiling tool?

Brad

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Something like this might be a good start for such a tool.

Marc

; ======================================================================== ======

; File: "coverage.scm", Time-stamp: <2005-04-27 12:12:52 feeley>

; Copyright (C) 2005 by Marc Feeley, All Rights Reserved.

; ======================================================================== ======

; This is a simple test coverage system for Gambit 4.0 that uses the ; interpreter's single stepping infrastructure. The test coverage can ; only be done on interpreted code. However, the test coverage system ; (this file) can either be compiled or not, but if it is not compiled ; the program's execution will be much slower. When the test coverage ; system is compiled the program's execution is roughly 4 times slower ; than normal. When the test coverage system is interpreted the ; program's execution is roughly 20 times slower than normal. ; ; Here's a sample use: ; ; % gsi coverage.scm - ; > (coverage-on) ; > (if #f (+ 1 2 3) 4) ; (console)@2.5 ; (console)@2.18 ; 4 ; > (coverage-off) ; (console)@3.2 ; (console)@3.1 ; > (if #f (+ 1 2 3) 4) ; 4

; ======================================================================== ======

(define-macro (coverage-system-setup)

(define coverage-system-code '(let ()

(define (step-handler leapable? $code rte execute-body . other) (hit (##code-locat $code)) (##apply execute-body (##cons $code (##cons rte other))))

(define (hit locat) (if locat (begin ; the statistics could be tallied and displayed in a ; more user-friendly way than just dumping them to stderr (##display-locat locat #t ##stderr-port) (##newline ##stderr-port))))

(let ((new-stepper (##vector (##vector step-handler step-handler step-handler step-handler step-handler step-handler step-handler) #f #f #f #f #f #f #f))) (set! ##main-stepper new-stepper))))

`(if (##interp-procedure? (lambda () 0)) ; compiled or interpreted?

(begin (set! ##main-stepper (##no-stepper)) ; don't step coverage system! (##eval ',coverage-system-code))

(begin ,coverage-system-code)))

(define (coverage-on) (##step-on))

(define (coverage-off) (##step-off))

(coverage-system-setup)

; ======================================================================== ======