Hi.
I don't have a clue what this relates to, but just in case it helps for
your sample, here are the outputs for 2 Linux Debian systems (don't know
how to output the version of perlio though) :
1)
[EMAIL PROTECTED]:~# uname -a
Linux arthur 2.6.18-6-686 #1 SMP Thu May 8 07:34:27 UTC 2008 i686 GNU/Linux
[EMAIL PROTECTED]:~# PERLIO="stdio" perl -pe 'BEGIN {my
$smaps="/proc/$$/smaps"; open STDIN, "<", $smaps or die "$!\n"; system
"cat -n $smaps"} $_="$.\t$_"'|grep vdso"} $_="$.\t$_"'|grep vd
155 b7f92000-b7f93000 r-xp b7f92000 00:00 0
[vdso]
155 b7f92000-b7f93000 r-xp b7f92000 00:00 0 [vdso]
[EMAIL PROTECTED]:~# perl -V
Summary of my perl5 (revision 5 version 8 subversion 8) configuration:
Platform:
osname=linux, osvers=2.6.24.4, archname=i486-linux-gnu-thread-multi
uname='linux ninsei 2.6.24.4 #1 smp preempt fri apr 18 15:36:09 pdt
2008 i686 gnulinux '
config_args='-Dusethreads -Duselargefiles -Dccflags=-DDEBIAN
-Dcccdlflags=-fPIC -Darchname=i486-linux-gnu -Dprefix=/usr
-Dprivlib=/usr/share/perl/5.8 -Darchlib=/usr/lib/perl/5.8
-Dvendorprefix=/usr -Dvendorlib=/usr/share/perl5
-Dvendorarch=/usr/lib/perl5 -Dsiteprefix=/usr/local
-Dsitelib=/usr/local/share/perl/5.8.8
-Dsitearch=/usr/local/lib/perl/5.8.8 -Dman1dir=/usr/share/man/man1
-Dman3dir=/usr/share/man/man3 -Dsiteman1dir=/usr/local/man/man1
-Dsiteman3dir=/usr/local/man/man3 -Dman1ext=1 -Dman3ext=3perl
-Dpager=/usr/bin/sensible-pager -Uafs -Ud_csh -Uusesfio -Uusenm
-Duseshrplib -Dlibperl=libperl.so.5.8.8 -Dd_dosuid -des'
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='cc', ccflags ='-D_REENTRANT -D_GNU_SOURCE -DTHREADS_HAVE_PIDS
-DDEBIAN -fno-strict-aliasing -pipe -I/usr/local/include
-D_LARGEFILE_SOURCE -D_FILE_OFFSET_BITS=64',
optimize='-O2',
cppflags='-D_REENTRANT -D_GNU_SOURCE -DTHREADS_HAVE_PIDS -DDEBIAN
-fno-strict-aliasing -pipe -I/usr/local/include'
ccversion='', gccversion='4.1.2 20061115 (prerelease) (Debian
4.1.1-21)', 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='cc', ldflags =' -L/usr/local/lib'
libpth=/usr/local/lib /lib /usr/lib
libs=-lgdbm -lgdbm_compat -ldb -ldl -lm -lpthread -lc -lcrypt
perllibs=-ldl -lm -lpthread -lc -lcrypt
libc=/lib/libc-2.3.6.so, so=so, useshrplib=true,
libperl=libperl.so.5.8.8
gnulibc_version='2.3.6'
Dynamic Linking:
dlsrc=dl_dlopen.xs, dlext=so, d_dlsymun=undef, ccdlflags='-Wl,-E'
cccdlflags='-fPIC', lddlflags='-shared -L/usr/local/lib'
Characteristics of this binary (from libperl):
Compile-time options: MULTIPLICITY PERL_IMPLICIT_CONTEXT
PERL_MALLOC_WRAP THREADS_HAVE_PIDS USE_ITHREADS
USE_LARGE_FILES USE_PERLIO USE_REENTRANT_API
Built under linux
Compiled at Apr 25 2008 20:23:05
@INC:
/etc/perl
/usr/local/lib/perl/5.8.8
/usr/local/share/perl/5.8.8
/usr/lib/perl5
/usr/share/perl5
/usr/lib/perl/5.8
/usr/share/perl/5.8
/usr/local/lib/site_perl
/usr/local/lib/perl/5.8.4
/usr/local/share/perl/5.8.4
.
[EMAIL PROTECTED]:~#
2)
dent:~# uname -a
Linux dent 2.6.18-6-xen-amd64 #1 SMP Thu May 8 08:34:37 UTC 2008 x86_64
GNU/Linux
dent:~# PERLIO="stdio" perl -pe 'BEGIN {my $smaps="/proc/$$/smaps"; open
STDIN, "<", $smaps or die "$!\n"; system "cat -n $smaps"}
$_="$.\t$_"'|grep vdso
232 ffffffffff600000-ffffffffffe00000 ---p 00000000 00:00 0
[vdso]
232 ffffffffff600000-ffffffffffe00000 ---p 00000000 00:00 0
[vdso]
dent:~# perl -V
Summary of my perl5 (revision 5 version 8 subversion 8) configuration:
Platform:
osname=linux, osvers=2.6.24-1-amd64,
archname=x86_64-linux-gnu-thread-multi
uname='linux deneb 2.6.24-1-amd64 #1 smp thu mar 27 16:52:38 utc
2008 x86_64 gnulinux '
config_args='-Dusethreads -Duselargefiles -Dccflags=-DDEBIAN
-Dcccdlflags=-fPIC -Darchname=x86_64-linux-gnu -Dprefix=/usr
-Dprivlib=/usr/share/perl/5.8 -Darchlib=/usr/lib/perl/5.8
-Dvendorprefix=/usr -Dvendorlib=/usr/share/perl5
-Dvendorarch=/usr/lib/perl5 -Dsiteprefix=/usr/local
-Dsitelib=/usr/local/share/perl/5.8.8
-Dsitearch=/usr/local/lib/perl/5.8.8 -Dman1dir=/usr/share/man/man1
-Dman3dir=/usr/share/man/man3 -Dsiteman1dir=/usr/local/man/man1
-Dsiteman3dir=/usr/local/man/man3 -Dman1ext=1 -Dman3ext=3perl
-Dpager=/usr/bin/sensible-pager -Uafs -Ud_csh -Uusesfio -Uusenm
-Duseshrplib -Dlibperl=libperl.so.5.8.8 -Dd_dosuid -des'
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='cc', ccflags ='-D_REENTRANT -D_GNU_SOURCE -DTHREADS_HAVE_PIDS
-DDEBIAN -fno-strict-aliasing -pipe -I/usr/local/include
-D_LARGEFILE_SOURCE -D_FILE_OFFSET_BITS=64',
optimize='-O2',
cppflags='-D_REENTRANT -D_GNU_SOURCE -DTHREADS_HAVE_PIDS -DDEBIAN
-fno-strict-aliasing -pipe -I/usr/local/include'
ccversion='', gccversion='4.1.2 20061115 (prerelease) (Debian
4.1.1-21)', 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='cc', ldflags =' -L/usr/local/lib'
libpth=/usr/local/lib /lib /usr/lib
libs=-lgdbm -lgdbm_compat -ldb -ldl -lm -lpthread -lc -lcrypt
perllibs=-ldl -lm -lpthread -lc -lcrypt
libc=/lib/libc-2.3.6.so, so=so, useshrplib=true,
libperl=libperl.so.5.8.8
gnulibc_version='2.3.6'
Dynamic Linking:
dlsrc=dl_dlopen.xs, dlext=so, d_dlsymun=undef, ccdlflags='-Wl,-E'
cccdlflags='-fPIC', lddlflags='-shared -L/usr/local/lib'
Characteristics of this binary (from libperl):
Compile-time options: MULTIPLICITY PERL_IMPLICIT_CONTEXT
PERL_MALLOC_WRAP THREADS_HAVE_PIDS USE_64_BIT_ALL
USE_64_BIT_INT USE_ITHREADS USE_LARGE_FILES
USE_PERLIO USE_REENTRANT_API
Built under linux
Compiled at Apr 25 2008 19:26:38
@INC:
/etc/perl
/usr/local/lib/perl/5.8.8
/usr/local/share/perl/5.8.8
/usr/lib/perl5
/usr/share/perl5
/usr/lib/perl/5.8
/usr/share/perl/5.8
/usr/local/lib/site_perl
.
dent:~#
Torsten Foertsch wrote:
Hi,
I have recently got a bug report about Linux::Smaps. The poster said it'd
report 2 [vdso] areas and that it can be cured if /proc/self/smaps is opened
with '<:stdio'. Later on he also found the behavior depends on the kernel
version, 2.6.25.3 shows 2 vdsos 2.6.23.1-21 only one.
Since I don't have any of these kernels I am asking for help. To all of my
knowledge multiple vdsos is nonsense. But is it a kernel bug or a bug in the
perlio layer?
Could you please run the following command on various combinations of linux
kernel and perlio?
PERLIO="stdio" perl -pe 'BEGIN {my $smaps="/proc/$$/smaps";
open STDIN, "<", $smaps or die "$!\n"; system "cat -n $smaps"}
$_="$.\t$_"' | grep vdso
It should print 2 almost identical lines. If there are more please report.
Here an example:
$ PERLIO="stdio" perl -pe 'BEGIN {my $smaps="/proc/$$/smaps"; open STDIN, "<", $smaps or die
"$!\n"; system "cat -n $smaps"} $_="$.\t$_"'|grep vdso
321 ffffe000-fffff000 r-xp 00000000 00:00 0 [vdso]
321 ffffe000-fffff000 r-xp 00000000 00:00 0 [vdso]
Keep in mind that /proc/$$/smaps exists only for kernels >=2.6.14.
Thanks,
Torsten
