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[perl #55668] 'eval'ing a certain format string segfaults perl
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From:
Arthur Kantor
Date:
June 12, 2008 09:55
Subject:
[perl #55668] 'eval'ing a certain format string segfaults perl
Message ID:
rt-3.6.HEAD-18229-1213268284-865.55668-75-0@perl.org
# New Ticket Created by Arthur Kantor
# Please include the string: [perl #55668]
# in the subject line of all future correspondence about this issue.
# <URL: http://rt.perl.org/rt3/Ticket/Display.html?id=55668 >
This is a bug report for perl from kantor@cs.wisc.edu,
generated with the help of perlbug 1.35 running under perl v5.8.8.
-----------------------------------------------------------------
[Please enter your report here]
The following program segfaults perl:
The error has something to do with escaping the $ sign in \$oSpec).
The test case follows:
#!/usr/bin/perl -w
use strict;
my $optSpec = [
["help|h",
"",
"print this help message"],
["dataDir|d=s",
"/cworkspace/ifp-32-2/hasegawa/data/telephone/eng/fisher1",
"The corpus data dir"]
];
printDocOptions($optSpec);
sub printDocOptions{
my ($optSpec) = @_;
print "Options:\n";
#TODO make the options spec display
my $maxOptLength=0;
foreach my $o (@$optSpec){
$maxOptLength =length($o->[0]) if($maxOptLength <
length($o->[0])) ;
}
my ($oSpec, $oDefault, $oDesc);
my $format = "format STDOUT = \n"
. ' ^' . '<' x $maxOptLength . "\n"
. '\$oSpec' . "\n"
. ' ' . ' ' x $maxOptLength . "^* ~~\n"
. '\$oDesc' . "\n"
. ".\n";
print $format;
eval $format;
die $@ if $@;
foreach my $o (@$optSpec){
($oSpec, $oDefault, $oDesc) = @$o;
write;
}
return "";
}
[Please do not change anything below this line]
-----------------------------------------------------------------
---
Flags:
category=core
severity=medium
---
This perlbug was built using Perl v5.8.8 in the Red Hat build system.
It is being executed now by Perl v5.8.8 - Tue Apr 29 02:54:41 EDT 2008.
Site configuration information for perl v5.8.8:
Configured by Red Hat, Inc. at Tue Apr 29 02:54:41 EDT 2008.
Summary of my perl5 (revision 5 version 8 subversion 8) configuration:
Platform:
osname=linux, osvers=2.6.18-53.1.14.el5xen,
archname=i386-linux-thread-multi
uname='linux xenbuilder2.fedora.redhat.com 2.6.18-53.1.14.el5xen #1
smp tue feb 19 07:33:17 est 2008 i686 i686 i386 gnulinux '
config_args='-des -Doptimize=-O2 -g -pipe -Wall
-Wp,-D_FORTIFY_SOURCE=2 -fexceptions -fstack-protector
--param=ssp-buffer-size=4 -m32 -march=i386 -mtune=generic
-fasynchronous-unwind-tables -Dversion=5.8.8 -Dmyhostname=localhost
-Dperladmin=root@localhost -Dcc=gcc -Dcf_by=Red Hat, Inc.
-Dinstallprefix=/usr -Dprefix=/usr -Darchname=i386-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=undef use64bitall=undef 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 -pipe -Wall -Wp,-D_FORTIFY_SOURCE=2 -fexceptions
-fstack-protector --param=ssp-buffer-size=4 -m32 -march=i386
-mtune=generic -fasynchronous-unwind-tables',
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 20070925 (Red Hat 4.1.2-33)',
gccosandvers=''
intsize=4, longsize=4, ptrsize=4, doublesize=8, byteorder=1234
d_longlong=define, longlongsize=8, d_longdbl=define, longdblsize=12
ivtype='long', ivsize=4, nvtype='double', nvsize=8, Off_t='off_t',
lseeksize=8
alignbytes=4, prototype=define
Linker and Libraries:
ld='gcc', ldflags =' -L/usr/local/lib'
libpth=/usr/local/lib /lib /usr/lib
libs=-lresolv -lnsl -lgdbm -ldb -ldl -lm -lcrypt -lutil -lpthread -lc
perllibs=-lresolv -lnsl -ldl -lm -lcrypt -lutil -lpthread -lc
libc=/lib/libc-2.7.so, so=so, useshrplib=true, libperl=libperl.so
gnulibc_version='2.7'
Dynamic Linking:
dlsrc=dl_dlopen.xs, dlext=so, d_dlsymun=undef, ccdlflags='-Wl,-E
-Wl,-rpath,/usr/lib/perl5/5.8.8/i386-linux-thread-multi/CORE'
cccdlflags='-fPIC', lddlflags='-shared -O2 -g -pipe -Wall
-Wp,-D_FORTIFY_SOURCE=2 -fexceptions -fstack-protector
--param=ssp-buffer-size=4 -m32 -march=i386 -mtune=generic
-fasynchronous-unwind-tables -L/usr/local/lib'
Locally applied patches:
---
@INC for perl v5.8.8:
/usr/lib/perl5/site_perl/5.8.8/i386-linux-thread-multi
/usr/lib/perl5/site_perl/5.8.7/i386-linux-thread-multi
/usr/lib/perl5/site_perl/5.8.6/i386-linux-thread-multi
/usr/lib/perl5/site_perl/5.8.5/i386-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/lib/perl5/vendor_perl/5.8.8/i386-linux-thread-multi
/usr/lib/perl5/vendor_perl/5.8.7/i386-linux-thread-multi
/usr/lib/perl5/vendor_perl/5.8.6/i386-linux-thread-multi
/usr/lib/perl5/vendor_perl/5.8.5/i386-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/lib/perl5/5.8.8/i386-linux-thread-multi
/usr/lib/perl5/5.8.8
.
---
Environment for perl v5.8.8:
HOME=/home/arthur
LANG=en_US.UTF-8
LANGUAGE (unset)
LD_LIBRARY_PATH (unset)
LOGDIR (unset)
PATH=/usr/kerberos/bin:/usr/local/bin:/usr/bin:/bin:/usr/X11R6/bin:/home/arthur/bin
PERL_BADLANG (unset)
SHELL=/bin/bash
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[perl #55668] 'eval'ing a certain format string segfaults perl
by Arthur Kantor