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Posted to modperl@perl.apache.org by Christian Mehring <16...@es-ist-liebe.de> on 2008/06/19 19:05:57 UTC
bug report: wrong line number if using built-in functions
-------------8<---------- Start Bug Report ------------8<----------
1. Problem Description:
Line numbers will be wrong if a bulit-in function's first parameter is not
in the same line.
Minimized example:
01: #!/usr/local/bin/perl
02: use strict;
03: use warnings;
04:
05: abs
06:
07: 5;
08:
09: die __LINE__;
10:
11: __END__
Expected line is 9. Result is 11.
-> Warnings and dies give wrong line numbers. Finding errors is difficult
so.
2. Used Components and their Configuration:
*** mod_perl version 2.000002
*** using
/usr/lib64/perl5/vendor_perl/5.8.8/x86_64-linux-thread-multi/Apache2/Bui
ldConfig.pm
*** Makefile.PL options:
MP_APR_CONFIG => /usr/bin/apr-1-config
MP_APR_LIB => aprext
MP_APXS => /usr/sbin/apxs
MP_COMPAT_1X => 1
MP_GENERATE_XS => 1
MP_LIBNAME => mod_perl
MP_USE_DSO => 1
*** The httpd binary was not found
*** (apr|apu)-config linking info
-laprutil-1 -lldap -llber -ldb-4.3 -lexpat
-lapr-1 -lpthread -ldl
*** /usr/bin/perl -V
Summary of my perl5 (revision 5 version 8 subversion 8) configuration:
Platform:
osname=linux, osvers=2.6.18-53.1.4.el5,
archname=x86_64-linux-thread-multi
uname='linux dhcp6-189.pnq.redhat.com 2.6.18-53.1.4.el5 #1 smp wed
nov 14 10:37:27 est 2007 x86_64 x86_64 x86_64 gnulinux '
config_args='-des -Doptimize=-O2 -g -Dversion=5.8.8
-Dmyhostname=localhost -Dperladmin=root@localhost -Dcc=gcc -Dcf_by=Red
Hat, Inc. -Dinstallprefix=/usr -Dprefix=/usr -Dlibpth=/usr/local/lib64
/lib64 /usr/lib64 -Dprivlib=/usr/lib/perl5/5.8.8
-Dsitelib=/usr/lib/perl5/site_perl/5.8.8
-Dvendorlib=/usr/lib/perl5/vendor_perl/5.8.8
-Darchlib=/usr/lib64/perl5/5.8.8/x86_64-linux-thread-multi
-Dsitearch=/usr/lib64/perl5/site_perl/5.8.8/x86_64-linux-thread-multi
-Dvendorarch=/usr/lib64/perl5/vendor_perl/5.8.8/x86_64-linux-thread-mult
i -Darchname=x86_64-linux -Dvendorprefix=/usr -Dsiteprefix=/usr
-Duseshrplib -Dusethreads -Duseithreads -Duselargefiles -Dd_dosuid
-Dd_semctl_semun -Di_db -Ui_ndbm -Di_gdbm -Di_shadow -Di_syslog
-Dman3ext=3pm -Duseperlio -Dinstallusrbinperl=n -Ubincompat5005
-Uversiononly -Dpager=/usr/bin/less -isr -Dd_gethostent_r_proto
-Ud_endhostent_r_proto -Ud_sethostent_r_proto -Ud_endprotoent_r_proto
-Ud_setprotoent_r_proto -Ud_endservent_r_proto -Ud_setservent_r
_proto -Dinc_version_list=5.8.7 5.8.6 5.8.5 -Dscriptdir=/usr/bin'
hint=recommended, useposix=true, d_sigaction=define
usethreads=define use5005threads=undef useithreads=define
usemultiplicity=define
useperlio=define d_sfio=undef uselargefiles=define usesocks=undef
use64bitint=define use64bitall=define uselongdouble=undef
usemymalloc=n, bincompat5005=undef
Compiler:
cc='gcc', ccflags ='-D_REENTRANT -D_GNU_SOURCE -fno-strict-aliasing
-pipe -Wdeclaration-after-statement -I/usr/local/include
-D_LARGEFILE_SOURCE -D_FILE_OFFSET_BITS=64 -I/usr/include/gdbm',
optimize='-O2 -g',
cppflags='-D_REENTRANT -D_GNU_SOURCE -fno-strict-aliasing -pipe
-Wdeclaration-after-statement -I/usr/local/include -I/usr/include/gdbm'
ccversion='', gccversion='4.1.2 20070626 (Red Hat 4.1.2-14)',
gccosandvers=''
intsize=4, longsize=8, ptrsize=8, doublesize=8, byteorder=12345678
d_longlong=define, longlongsize=8, d_longdbl=define, longdblsize=16
ivtype='long', ivsize=8, nvtype='double', nvsize=8, Off_t='off_t',
lseeksize=8
alignbytes=8, prototype=define
Linker and Libraries:
ld='gcc', ldflags =''
libpth=/usr/local/lib64 /lib64 /usr/lib64
libs=-lresolv -lnsl -lgdbm -ldb -ldl -lm -lcrypt -lutil -lpthread
-lc
perllibs=-lresolv -lnsl -ldl -lm -lcrypt -lutil -lpthread -lc
libc=/lib/libc-2.5.so, so=so, useshrplib=true, libperl=libperl.so
gnulibc_version='2.5'
Dynamic Linking:
dlsrc=dl_dlopen.xs, dlext=so, d_dlsymun=undef, ccdlflags='-Wl,-E
-Wl,-rpath,/usr/lib64/perl5/5.8.8/x86_64-linux-thread-multi/CORE'
cccdlflags='-fPIC', lddlflags='-shared -O2 -g'
Characteristics of this binary (from libperl):
Compile-time options: MULTIPLICITY PERL_IMPLICIT_CONTEXT
PERL_MALLOC_WRAP USE_64_BIT_ALL USE_64_BIT_INT
USE_ITHREADS USE_LARGE_FILES USE_PERLIO
USE_REENTRANT_API
Built under linux
Compiled at Feb 22 2008 01:27:07
%ENV:
PERL_LWP_USE_HTTP_10="1"
@INC:
/usr/lib64/perl5/site_perl/5.8.8/x86_64-linux-thread-multi
/usr/lib64/perl5/site_perl/5.8.7/x86_64-linux-thread-multi
/usr/lib64/perl5/site_perl/5.8.6/x86_64-linux-thread-multi
/usr/lib64/perl5/site_perl/5.8.5/x86_64-linux-thread-multi
/usr/lib/perl5/site_perl/5.8.8
/usr/lib/perl5/site_perl/5.8.7
/usr/lib/perl5/site_perl/5.8.6
/usr/lib/perl5/site_perl/5.8.5
/usr/lib/perl5/site_perl
/usr/lib64/perl5/vendor_perl/5.8.8/x86_64-linux-thread-multi
/usr/lib64/perl5/vendor_perl/5.8.7/x86_64-linux-thread-multi
/usr/lib64/perl5/vendor_perl/5.8.6/x86_64-linux-thread-multi
/usr/lib64/perl5/vendor_perl/5.8.5/x86_64-linux-thread-multi
/usr/lib/perl5/vendor_perl/5.8.8
/usr/lib/perl5/vendor_perl/5.8.7
/usr/lib/perl5/vendor_perl/5.8.6
/usr/lib/perl5/vendor_perl/5.8.5
/usr/lib/perl5/vendor_perl
/usr/lib64/perl5/5.8.8/x86_64-linux-thread-multi
/usr/lib/perl5/5.8.8
.
*** Packages of interest status:
Apache2 : -
Apache2::Request : -
CGI : 3.15
ExtUtils::MakeMaker: 6.30
LWP : 5.805
mod_perl : -
mod_perl2 : 2.000002
3. This is the core dump trace: (if you get a core dump):
[CORE TRACE COMES HERE]
This report was generated by /usr/bin/mp2bug on Tue Jun 17 14:04:26 2008
GMT.
-------------8<---------- End Bug Report --------------8<----------
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Re: bug report: wrong line number if using built-in functions
Posted by "Philippe M. Chiasson" <go...@ectoplasm.org>.
Christian Mehring wrote:
> -------------8<---------- Start Bug Report ------------8<----------
> 1. Problem Description:
>
> Line numbers will be wrong if a bulit-in function's first parameter is not
> in the same line.
>
> Minimized example:
>
> 01: #!/usr/local/bin/perl
> 02: use strict;
> 03: use warnings;
> 04:
> 05: abs
> 06:
> 07: 5;
> 08:
> 09: die __LINE__;
> 10:
> 11: __END__
>
> Expected line is 9. Result is 11.
>
> -> Warnings and dies give wrong line numbers. Finding errors is difficult
> so.
I've been able to reproduce this problem, and it smells like it might be caused by the
optmizer rolling that statement into a single line...
I don't have time to look much into this, but I've attached a patch to the test
case that illustrates the problem, in case anybody else want to have a shot at this.
--
Philippe M. Chiasson GPG: F9BFE0C2480E7680 1AE53631CB32A107 88C3A5A5
http://gozer.ectoplasm.org/ m/gozer\@(apache|cpan|ectoplasm)\.org/