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Re: Perl threads sort test program crashes (Cannot reproduce (win32/5.8.3/AS809))

by BrowserUk (Pope)
on Jun 16, 2004 at 10:39 UTC ( #367170=note: print w/replies, xml ) Need Help??


in reply to Perl threads sort test program crashes

It doesn't crash for me?

P:\test>perl -v This is perl, v5.8.3 built for MSWin32-x86-multi-thread (with 8 registered patches, see perl -V for more detail) Copyright 1987-2003, Larry Wall Binary build 809 provided by ActiveState Corp. http://www.ActiveState. +com ActiveState is a division of Sophos. Built Feb 3 2004 00:28:51 Perl may be copied only under the terms of either the Artistic License + or the GNU General Public License, which may be found in the Perl 5 source ki +t. Complete documentation for Perl, including FAQ lists, should be found +on this system using `man perl' or `perldoc perl'. If you have access to + the Internet, point your browser at http://www.perl.com/, the Perl Home Pa +ge. P:\test>type 367162.pl #!/usr/bin/perl -w use strict; use threads; $|=1; sub mycmp { length($b) <=> length($a) } sub do_one_thread { my $kid = shift; warn "kid $kid before sort\n"; my @list = ( 'x', 'yy', 'zzz', 'a', 'bb', 'ccc', 'aaaaa', 'z', 'hello', 's', 'thisisalongname', '1', '2', '3', 'abc', 'xyz', '1234567890', 'm', 'n', 'p' ); for my $j (1..1000) { # This does not crash # for my $k (sort { length($b) <=> length($a) } @list) {} # Yet this does for my $k (sort mycmp @list) {} } warn "kid $kid after sort\n"; } sub do_threads { my $nthreads = shift; my @kids = (); for my $i (1..$nthreads) { my $t = threads->new(\&do_one_thread, $i); warn "parent $$: continue\n"; push(@kids, $t); } for my $t (@kids) { warn "parent $$: waiting for join\n"; $t->join(); warn "parent $$: thread exited\n"; } } # do_threads(1); # does not crash do_threads(2); # crashes P:\test>367162 parent 320: continue kid 1 before sort kid 1 after sort parent 320: continue parent 320: waiting for join parent 320: thread exited parent 320: waiting for join kid 2 before sort kid 2 after sort parent 320: thread exited

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"Efficiency is intelligent laziness." -David Dunham
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