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Postings from July 2005
On 2005–07–27, at 20:31, John Narron wrote:
> perl -e 'my $x = q[if ($h->{ALPHA}->{BETA}->{q{stuff}}) {] . "\n" . q[
> stuff($h, @_);] . "\n}\n\n"; $x x= 7238; $x =~ s/stuff/"stuff" .
> ++$count/eg; eval $x'
Problem confirmed with the above script on Mac OS X. The tipping
point for a debugging bleadperl@25218 with a stack limit of 8192k is
$x x= 26197. For a 64-bit perl it's somewhat more than half that; for
a production perl 5.8.6, it's much higher -- somewhere between 70 and
80,000. I'd put that difference down to the lack of debugging
overhead and to optimisation, but I don't have an optimised bleadperl
handy to check. The stack trace of a the crashed perl 5.8.6 looks like
Host Name: Tullamore
Date/Time: 2005-07-28 08:42:07.312 +0200
OS Version: 10.4.2 (Build 8C46)
Report Version: 3
Command: perl
Path: /sw/bin/perl
Parent: bash [300]
Version: ??? (???)
PID: 2876
Thread: 0
Exception: EXC_BAD_ACCESS (0x0001)
Codes: KERN_INVALID_ADDRESS (0x0001) at 0xbf7ffff0
Thread 0 Crashed:
0 perl 0x0002ffd0 Perl_newSV + 16 (crt.c:300)
1 perl 0x00081164 Perl_av_fetch + 688 (crt.c:300)
2 perl 0x000b0268 Perl_pad_alloc + 236 (crt.c:300)
3 perl 0x000179d4 Perl_peep + 496 (crt.c:300)
4 perl 0x00017fe4 Perl_peep + 2048 (crt.c:300)
5 perl 0x00017fe4 Perl_peep + 2048 (crt.c:300)
... [you get the idea]
501 perl 0x00017fe4 Perl_peep + 2048 (crt.c:300)
502 perl 0x00017fe4 Perl_peep + 2048 (crt.c:300)
503 perl 0x00017fe4 Perl_peep + 2048 (crt.c:300)
504 perl 0x00017fe4 Perl_peep + 2048 (crt.c:300)
505 perl 0x00017fe4 Perl_peep + 2048 (crt.c:300)
506 perl 0x00017fe4 Perl_peep + 2048 (crt.c:300)
507 perl 0x00017fe4 Perl_peep + 2048 (crt.c:300)
508 perl 0x00017fe4 Perl_peep + 2048 (crt.c:300)
Thread 0 crashed with PPC Thread State 64:
srr0: 0x000000000002ffd0 srr1:
0x100000000000d030 vrsave: 0x0000000000000000
cr: 0x28004284 xer: 0x0000000000000000 lr:
0x0000000000081164 ctr: 0x000000000003177c
r0: 0x0000000000081164 r1: 0x00000000bf800040 r2:
0x0000000000000000 r3: 0x0000000001800400
r4: 0x0000000000000000 r5: 0x00000000000e69ad r6:
0x0000000000000001 r7: 0x0000000001a1d200
r8: 0x000000000000006f r9: 0x000000000b005000 r10:
0x000000000000007f r11: 0x00000000018028c0
r12: 0x000000009000a770 r13: 0x0000000000000000 r14:
0x0000000000000000 r15: 0x0000000000000000
r16: 0x0000000000000000 r17: 0x0000000000000000 r18:
0x0000000000000000 r19: 0x000000000000012c
r20: 0x0000000000000002 r21: 0x0000000000305c50 r22:
0x000000000180be00 r23: 0x000000000180ba00
r24: 0x000000000dbaf6b0 r25: 0x0000000000000001 r26:
0x0000000000000003 r27: 0x000000000180b60c
r28: 0x0000000001800400 r29: 0x0000000001800400 r30:
0x0000000001800400 r31: 0x0000000000080ec4
Binary Images Description:
0x1000 - 0xd9fff perl /sw/bin/perl
0x8fe00000 - 0x8fe51fff dyld 43.1 /usr/lib/dyld
0x90000000 - 0x901a6fff libSystem.B.dylib /usr/lib/libSystem.B.dylib
0x901fe000 - 0x90202fff libmathCommon.A.dylib /usr/lib/system/
libmathCommon.A.dylib
--
Dominic Dunlop