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vrf Dead Code

Question asked by rsb on Aug 25, 2004

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"Drago, William @NARDAEAST" <William.Drago@L-3com.com> wrote:
> Thanks, but no thanks. For large programs this is much too labor intensive
> and error prone.
>
> If nothing turns up on the VRF I'll have to write something myself.

Should be pretty easy to write - just parse the source looking
for defined functions and then for function calls and compare the
two lists.

This would catch any "static" code but would of course miss
run-time programmatic calls. To catch these you'd need to do something
at runtime so it would get much more tricky.

But maybe just the static code would suffice?

Stan

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WDrago Aug 24, 2004 11:39 PM
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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 3.2//EN"><HTML><HEAD><META HTTP-EQUIV="Content-Type" CONTENT="text/html; charset=iso-8859-1"><META NAME="Generator" CONTENT="MS Exchange Server version 5.5.2654.45"><TITLE>Dead Code</TITLE></HEAD><BODY>All,Has anyone written a utility that identifies uncalled functions in a vee program?Thanks, Bill--- You are currently subscribed to vrf as: rsb@soco.agilent.com To subscribe send a blank email to "join-vrf@it.lists.it.agilent.com". To unsubscribe send a blank email to "leave-vrf@it.lists.it.agilent.com". To send messages to this mailing list, email "vrf@agilent.com". If you need help with the mailing list send a message to "owner-vrf@it.lists.it.agilent.com".</BODY></HTML>
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reiner.schlieker Aug 24, 2004 11:54 PM
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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN"><HTML><HEAD><META HTTP-EQUIV="Content-Type" CONTENT="text/html; charset=iso-8859-1"><TITLE>Dead Code</TITLE><META content="MSHTML 5.50.4937.800" name=GENERATOR></HEAD><BODY><DIV>Somewhat usefull for this is the profiler in VEE - it will show what functions have or haven't been run, but, just because a function hasn't been called during the execution that you recorded doesn't mean that it's never called...</DIV><DIV> </DIV><DIV>After running the profiler, you could search for the names of functions that didn't run to see if they're called anywhere.</DIV><DIV> </DIV><DIV>Reiner</DIV><DIV> </DIV><BLOCKQUOTE> <DIV class=OutlookMessageHeader dir=ltr align=left>-----Original Message----- From: Drago, William @NARDAEAST [mailto:William.Drago@L-3com.com] Sent: Wednesday, August 25, 2004 2:40 PM To: VRF Subject: [vrf] Dead Code </DIV> All, Has anyone written a utility that identifies uncalled functions in a vee program? Thanks, Bill --- You are currently subscribed to vrf as: reiner.schlieker@siemens.com To subscribe send a blank email to "join-vrf@it.lists.it.agilent.com". To unsubscribe send a blank email to "leave-vrf@it.lists.it.agilent.com". To send messages to this mailing list, email "vrf@agilent.com". If you need help with the mailing list send a message to "owner-vrf@it.lists.it.agilent.com". </BLOCKQUOTE>--- You are currently subscribed to vrf as: rsb@soco.agilent.com To subscribe send a blank email to "join-vrf@it.lists.it.agilent.com". To unsubscribe send a blank email to "leave-vrf@it.lists.it.agilent.com". To send messages to this mailing list, email "vrf@agilent.com". If you need help with the mailing list send a message to "owner-vrf@it.lists.it.agilent.com".</BODY></HTML>
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michael.asbery Aug 25, 2004 12:01 AM
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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 3.2//EN"><html><head><META HTTP-EQUIV="Content-Type" CONTENT="text/html; charset=us-ascii"><meta name=Generator content="Microsoft Word 10 (filtered)"><title>Dead Code</title><style></style></head><body lang=EN-US link=blue vlink=purple><div class=Section1>Bill, What about using the system profiler. It will tell you what functions are executed if you check a box(You would haveto fully exercise your code to make sure all functions got executed). Otherwise you can manually do this by right clicking on each function andselecting “Called By” . If you get no hits – this isdead code. I don’t know of any utility thatdoes this though. Mike <div>***********************************************************
Michael N.Asbery (202)404-3014, DSN 754
US Naval Research Laboratory fax (202)404-7661
Code5733.20 michael.asbery@nrl.navy.mil<fontcolor=navy face=Arial>
4555 Overlook Ave SW
Washington DC 20375 :-)
***********************************************************<fontsize=2 color=navy face=Arial> </div><spanstyle='font-size:10.0pt;font-family:Tahoma'>-----Original Message-----
From: Drago, William @NARDAEAST[mailto:William.Drago@L-3com.com]
Sent: Wednesday, August 25, 20042:40 PM
To: VRF<fontsize=2 face=Tahoma>
Subject: [vrf] Dead Code<spanstyle='font-size:12.0pt'> All, Has anyone written a utility that identifies uncalledfunctions in a vee program? Thanks,
Bill<spanstyle='font-size:12.0pt'>---
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WDrago Aug 25, 2004 12:05 AM
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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN"><HTML><HEAD><META HTTP-EQUIV="Content-Type" CONTENT="text/html; charset=iso-8859-1"><TITLE>Dead Code</TITLE><META content="MSHTML 6.00.2800.1458" name=GENERATOR><STYLE>@font-face { font-family: Courier;}@font-face { font-family: Tahoma;}@page Section1 {size: 8.5in 11.0in; margin: 1.0in 1.25in 1.0in 1.25in; }P.MsoNormal { FONT-SIZE: 12pt; MARGIN: 0in 0in 0pt; FONT-FAMILY: "Times New Roman"}LI.MsoNormal { FONT-SIZE: 12pt; MARGIN: 0in 0in 0pt; FONT-FAMILY: "Times New Roman"}DIV.MsoNormal { FONT-SIZE: 12pt; MARGIN: 0in 0in 0pt; FONT-FAMILY: "Times New Roman"}A:link { COLOR: blue; TEXT-DECORATION: underline}SPAN.MsoHyperlink { COLOR: blue; TEXT-DECORATION: underline}A:visited { COLOR: purple; TEXT-DECORATION: underline}SPAN.MsoHyperlinkFollowed { COLOR: purple; TEXT-DECORATION: underline}P { FONT-SIZE: 12pt; MARGIN-LEFT: 0in; MARGIN-RIGHT: 0in; FONT-FAMILY: "Times New Roman"}SPAN.EmailStyle18 { COLOR: navy; FONT-FAMILY: Arial}DIV.Section1 { page: Section1}</STYLE></HEAD><BODY lang=EN-US vLink=purple link=blue><DIV>Thanks, but no thanks. For large programs this is much too labor intensive and error prone.</DIV><DIV> </DIV><DIV>If nothing turns up on the VRF I'll have to write something myself.</DIV><DIV> </DIV><DIV>Bill</DIV><BLOCKQUOTE style="PADDING-LEFT: 5px; MARGIN-LEFT: 5px; BORDER-LEFT: #000080 2px solid"> <DIV class=OutlookMessageHeader dir=ltr align=left>-----Original Message----- From: Michael Asbery [mailto:michael.asbery@nrl.navy.mil] Sent: Wednesday, August 25, 2004 3:02 PM To: VRF Subject: [vrf] RE: Dead Code </DIV> <DIV class=Section1> Bill, What about using the system profiler. It will tell you what functions are executed if you check a box(You would have to fully exercise your code to make sure all functions got executed). Otherwise you can manually do this by right clicking on each function and selecting "Called By" . If you get no hits - this is dead code. I don't know of any utility that does this though. Mike <DIV> *********************************************************** Michael N. Asbery (202)404-3014, DSN 754 US Naval Research Laboratory fax (202)404-7661 Code 5733.20 michael.asbery@nrl.navy.mil 4555 Overlook Ave SW Washington DC 20375 *********************************************************** </DIV> -----Original Message----- From: Drago, William @NARDAEAST [mailto:William.Drago@L-3com.com] Sent: Wednesday, August 25, 2004 2:40 PM To: VRF Subject: [vrf] Dead Code All, Has anyone written a utility that identifies uncalled functions in a vee program? Thanks, Bill --- You are currently subscribed to vrf as: michael.asbery@nrl.navy.mil To subscribe send a blank email to "join-vrf@it.lists.it.agilent.com". To unsubscribe send a blank email to "leave-vrf@it.lists.it.agilent.com". To send messages to this mailing list, email "vrf@agilent.com". If you need help with the mailing list send a message to "owner-vrf@it.lists.it.agilent.com". </DIV>--- You are currently subscribed to vrf as: William.Drago@L-3com.com To subscribe send a blank email to "join-vrf@it.lists.it.agilent.com". To unsubscribe send a blank email to "leave-vrf@it.lists.it.agilent.com". To send messages to this mailing list, email "vrf@agilent.com". If you need help with the mailing list send a message to "owner-vrf@it.lists.it.agilent.com". </BLOCKQUOTE>--- You are currently subscribed to vrf as: rsb@soco.agilent.com To subscribe send a blank email to "join-vrf@it.lists.it.agilent.com". To unsubscribe send a blank email to "leave-vrf@it.lists.it.agilent.com". To send messages to this mailing list, email "vrf@agilent.com". If you need help with the mailing list send a message to "owner-vrf@it.lists.it.agilent.com".</BODY></HTML>
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bill.ossmann Aug 25, 2004 1:11 AM
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. . . and after deleting dead code run the utility again to catch UF's that
were only called by the dead code you deleted; repeat until you find no
more.
I agree with Stan that the run-time programmatic calls could be just about
impossible to catch.
--
Bill Ossmann
Philips Ultrasound
e-mail: bill.ossmann@philips.com

"Drago, William @NARDAEAST" <William.Drago@L-3com.com> wrote:
> Thanks, but no thanks. For large programs this is much too labor
intensive
> and error prone.
>
> If nothing turns up on the VRF I'll have to write something myself.

Should be pretty easy to write - just parse the source looking
for defined functions and then for function calls and compare the
two lists.

This would catch any "static" code but would of course miss
run-time programmatic calls. To catch these you'd need to do something
at runtime so it would get much more tricky.

But maybe just the static code would suffice?

Stan

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VRFuser Aug 25, 2004 1:22 AM
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Also, dead code can be logic that never fires in a function that is used in your prgram. That is much more difficult to trap without an expert tool, and instrumented code.

Jeff Davis
Lead Software Test Engineer
CDI Engineering Solutions Aerospace Technologies
Embedded Systems and Electronics
3137 E Elwood # 160
Phoenix, Arizona 85034
Phone: (602)431-4497 (x226)
Cell: (480)330-1431
Fax: (602)431-4435

> -----Original Message-----
> From: bill.ossmann@philips.com [mailto:bill.ossmann@philips.com]
> Sent: Wednesday, August 25, 2004 01:11 PM
> To: VRF
> Subject: [vrf] RE: Dead Code
>
>
>
>
>
>
> . . . and after deleting dead code run the utility again to
> catch UF's that
> were only called by the dead code you deleted; repeat until
> you find no
> more.
> I agree with Stan that the run-time programmatic calls could
> be just about
> impossible to catch.
> --
> Bill Ossmann
> Philips Ultrasound
> e-mail: bill.ossmann@philips.com
>
>
>
> "Drago, William @NARDAEAST" <William.Drago@L-3com.com> wrote:
> > Thanks, but no thanks. For large programs this is much too labor
> intensive
> > and error prone.
> >
> > If nothing turns up on the VRF I'll have to write something myself.
>
> Should be pretty easy to write - just parse the source looking
> for defined functions and then for function calls and compare the
> two lists.
>
> This would catch any "static" code but would of course miss
> run-time programmatic calls. To catch these you'd need to do something
> at runtime so it would get much more tricky.
>
> But maybe just the static code would suffice?
>
> Stan
>
>
> --------------------------------------------------------------
> ------------
> Stan Bischof Agilent Technologies 707-577-3994
> stan_bischof@agilent.com
> --------------------------------------------------------------
> ------------
>
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