| Subject: | disable_profile broken |
| Date: | Wed, 8 Oct 2008 12:31:35 +0100 |
| To: | <bug-devel-nytprof [...] rt.cpan.org> |
| From: | "Alasdair McIntyre" <alasdair.mcintyre [...] lovefilm.com> |
If a profiled program terminates with profiling disabled, it appears to
result in a corrupted nytprof.out file. I came across this while
attempting
to selectively profile a page served out of an Apache Mason setup.
The following 3 failure cases result in an exit code of 255, and a
malformed
nytprof.out file, which nytprofhtml subsequently barfs on with:
Generating report...
inflate failed, error -5 ((null)) at end of input file - is it
truncated? at
/usr/lib/perl5/site_perl/5.8.8/i586-linux-thread-multi/Devel/NYTProf/Dat
a.pm line 74.
I also include a success case which demonstrates that leaving profiling
enabled at
termination results in a clean exit (and a good nytprof.out file).
ENVIRONMENT
-----------
* Distribution name and version: Devel-NYTProf-2.04
* Perl version: perl v5.8.8 built for i586-linux-thread-multi
* Operating System vendor and version: Linux version
2.6.16.46-0.12-bigsmp #1 SMP Thu May 17 14:00:09 UTC 2007 i686 i686 i386
GNU/Linux
FAILURE CASE 1
--------------
failure1.pl:
#!/usr/bin/perl
Invoke with:
perl -d:NYTProf ./failure1.pl
Output:
deflate failed, error -5 (buffer error) in 2981.
END failed--call queue aborted.
FAILURE CASE 2
--------------
failure2.pl:
#!/usr/bin/perl
print "Hello, world!\n";
Invoke with:
NYTPROF=start=no perl -d:NYTProf ./failure2.pl
Output:
Hello, world!
deflate failed, error -5 (buffer error) in 3525.
END failed--call queue aborted.
FAILURE CASE 3
--------------
failure3.pl:
#!/usr/bin/perl
DB::disable_profile;
print "Hello, world!\n";
Invoke with:
perl -d:NYTProf ./failure3.pl
Output:
Hello, world!
deflate failed, error -5 (buffer error) in 3946.
END failed--call queue aborted.
SUCCESS CASE
------------
success.pl:
#!/usr/bin/perl
DB::disable_profile;
print "Hello, world!\n";
DB::enable_profile;
Invoke with:
perl -d:NYTProf ./success.pl
Output:
Hello, world!
--
Alasdair McIntyre | Technical Architect | LOVEFiLM International Ltd
LOVEFiLM International Limited is a company registered in England and Wales. Registered Number: 04392195. Registered Office: No.9, 6 Portal Way, London W3 6RU, United Kingdom.
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