[perl #21282] perlio leaks memory

# New Ticket Created by  jaw+perlbug@tcp4me.com 
# Please include the string:  [perl #21282]
# in the subject line of all future correspondence about this issue. 
# <URL: http://rt.perl.org/rt2/Ticket/Display.html?id=21282 >



This is a bug report for perl from jaw+perlbug@tcp4me.com,
generated with the help of perlbug 1.34 running under perl v5.8.0.


-----------------------------------------------------------------
[Please enter your report here]

summary:
	perlio leaks memory. like a sieve.

details:
	the enclosed program, if run using a non-perlio perl
	does nothing interesting. if run using 5.8.0 with
	perlio the enclosed program leaks memory.

	solaris 8  leaks  96 bytes per iteration
	netbsd 1.6 leaks 410 bytes per iteration
	(no other OSes were tested)

	for the non-perlio tests, I tried all of 5.8.0 built
	without perlio, 5.6.1, and 5.00503. I tried solaris 8
	and netbsd 1.6.

note:
	perlio is enabled in the default configuration for 5.8.0
	perlio is not enabled in the default configurations for older perls

how to reproduce:
	run enclosed program.


################################################################
# example program
################################################################
use Socket;
my $n = 0;
my $tcp = getprotobyname('tcp');

sub stats {
    # I'm trying to show a problem with 'socket', not with 'ps'
    # if your 'ps' works differently, adjust as needed, or just
    # delete this completely and run 'top' in another window
    chop( my $mem = `ps -p $$ -o rss | tail -1` );
    print STDERR "iter: $n => mem: $mem\n";
}

while(1){
    socket(S, PF_INET, SOCK_STREAM, $tcp);
    close S;
    stats() unless ++$n % 5000;
}

# No, this is not my actual program, nor do I claim that the above
# is useful in way, it is just the smallest program I came up with
# that shows the problem. real + useful program available on request.



[Please do not change anything below this line]
-----------------------------------------------------------------
---
Flags:
    category=core
    severity=high
---
This perlbug was built using Perl v5.8.0 - Sat Feb 15 09:57:52 EST 2003
It is being executed now by  Perl v5.8.0 - Wed Feb  5 22:37:03 EST 2003.

Site configuration information for perl v5.8.0:

Configured by jaw at Wed Feb  5 22:37:03 EST 2003.

Summary of my perl5 (revision 5.0 version 8 subversion 0) configuration:
  Platform:
    osname=solaris, osvers=2.8, archname=sun4-solaris
    uname='sunos eumaeus.tcp4me.com 5.8 generic_108528-13 sun4u sparc sunw,ultraax-i2 '
    config_args=''
    hint=recommended, useposix=true, d_sigaction=define
    usethreads=undef use5005threads=undef useithreads=undef usemultiplicity=undef
    useperlio=define d_sfio=undef uselargefiles=define usesocks=undef
    use64bitint=undef use64bitall=undef uselongdouble=undef
    usemymalloc=n, bincompat5005=undef
  Compiler:
    cc='gcc', ccflags ='-fno-strict-aliasing -I/usr/local/include -D_LARGEFILE_SOURCE -D_FILE_OFFSET_BITS=64',
    optimize='-O',
    cppflags='-fno-strict-aliasing -I/usr/local/include'
    ccversion='', gccversion='2.95.2 19991024 (release)', gccosandvers='solaris2.8'
    intsize=4, longsize=4, ptrsize=4, doublesize=8, byteorder=4321
    d_longlong=define, longlongsize=8, d_longdbl=define, longdblsize=16
    ivtype='long', ivsize=4, nvtype='double', nvsize=8, Off_t='off_t', lseeksize=8
    alignbytes=8, prototype=define
  Linker and Libraries:
    ld='gcc', ldflags =' -L/usr/local/lib '
    libpth=/usr/local/lib /usr/lib /usr/ccs/lib
    libs=-lsocket -lnsl -ldl -lm -lc
    perllibs=-lsocket -lnsl -ldl -lm -lc
    libc=/lib/libc.so, so=so, useshrplib=false, libperl=libperl.a
    gnulibc_version=''
  Dynamic Linking:
    dlsrc=dl_dlopen.xs, dlext=so, d_dlsymun=undef, ccdlflags=' '
    cccdlflags='-fPIC', lddlflags='-G -L/usr/local/lib'

Locally applied patches:
    

---
@INC for perl v5.8.0:
    /usr/local/lib/perl5/5.8.0/sun4-solaris
    /usr/local/lib/perl5/5.8.0
    /usr/local/lib/perl5/site_perl/5.8.0/sun4-solaris
    /usr/local/lib/perl5/site_perl/5.8.0
    /usr/local/lib/perl5/site_perl
    .

---
Environment for perl v5.8.0:
    HOME=/home/eumaeus/jaw
    LANG (unset)
    LANGUAGE (unset)
    LD_LIBRARY_PATH (unset)
    LOGDIR (unset)
    PATH=/home/eumaeus/jaw/bin:/usr/pkg/script:/usr/local/script:/usr/pkg/bin:/usr/local/bin:/usr/local/bin/image:/usr/local/bin/gnu:/usr/local/bin/X:/usr/X11R6/bin:/usr/openwin/bin:/usr/openwin/bin/xview:/usr/ccs/bin:/opt/gnu/bin:/usr/local/lang:/bin:/usr/bin:/usr/local/etc:/usr/etc:/etc:/usr/hosts:/usr/local/bin/games:/usr/games:/usr/local/bin/xhack:/usr/lib:/usr/lib/acct:/usr/lib/uucp:/sbin:/usr/sbin:/usr/pkg/sbin:/usr/local/sbin:/usr/local/pgsql/bin:/usr/ucb:/home/eumaeus/jaw/sysadm
    PERL_BADLANG (unset)
    SHELL=/bin/csh

• [perl #21282] perlio leaks memory by perlbug-followup
• Re: [perl #21282] perlio leaks memory by Dave Mitchell