Package: perl Version: 5.8.7-8 Severity: normal
This is the beginning of Perl_magic_get in the perl-5.8.7 I compiled myself: Dump of assembler code for function Perl_magic_get: 0x000000000047dee0 <Perl_magic_get+0>: mov %r12,0xfffffffffffffff0(%rsp) 0x000000000047dee5 <Perl_magic_get+5>: mov %rbx,0xffffffffffffffe0(%rsp) 0x000000000047deea <Perl_magic_get+10>: mov %rdi,%r12 0x000000000047deed <Perl_magic_get+13>: mov %rbp,0xffffffffffffffe8(%rsp) 0x000000000047def2 <Perl_magic_get+18>: mov %r13,0xfffffffffffffff8(%rsp) 0x000000000047def7 <Perl_magic_get+23>: sub $0xa8,%rsp The last lien allocates 168 byte sof local variable space on the stack. This is the beginning of Perl_magic_get in debians (debug)perl on the same system: 0x00000000004aaf61 <Perl_magic_get+0>: push %rbp 0x00000000004aaf62 <Perl_magic_get+1>: mov %rsp,%rbp 0x00000000004aaf65 <Perl_magic_get+4>: push %r12 0x00000000004aaf67 <Perl_magic_get+6>: push %rbx 0x00000000004aaf68 <Perl_magic_get+7>: sub $0x40150,%rsp This allocates 262480 bytes(!) (in words: a quarter megabyte) of local variables on the stack. The problem is that for thread stacks, you don't want to allocate a megatbyte or so of stack for each thread (or even coroutine), not even if it's only virtual memory (page tables cost a lot). Obviously, perl can work with less than 256 bytes in Perl_magic_get, but in the debian binary, it uses much much more. This might be a problem with the compiler (I compiled with gcc-3.4) or the fact that my own perl doesn't have the windows thread emulation enabled. My perl configuration script ist attached. -- System Information: Debian Release: testing/unstable APT prefers unstable APT policy: (500, 'unstable'), (500, 'testing'), (500, 'stable') Architecture: amd64 (x86_64) Shell: /bin/sh linked to /bin/dash Kernel: Linux 2.6.14 Locale: LANG=C, LC_CTYPE=de_DE.UTF-8 (charmap=UTF-8) Versions of packages perl depends on: hi libc6 2.3.5-8.1 GNU C Library: Shared libraries an ii libdb4.3 4.3.29-1 Berkeley v4.3 Database Libraries [ ii libgdbm3 1.8.3-2 GNU dbm database routines (runtime ii perl-base 5.8.7-8 The Pathologically Eclectic Rubbis ii perl-modules 5.8.7-8 Core Perl modules Versions of packages perl recommends: ii perl-doc 5.8.7-8 Perl documentation -- no debconf information
Configure64.sh.txt
Description: application/shellscript
