From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (qmail 28709 invoked by alias); 17 Apr 2012 14:32:46 -0000 Received: (qmail 28688 invoked by uid 22791); 17 Apr 2012 14:32:44 -0000 X-SWARE-Spam-Status: No, hits=-6.3 required=5.0 tests=AWL,BAYES_00,KHOP_RCVD_UNTRUST,RCVD_IN_DNSWL_HI,RCVD_IN_HOSTKARMA_W,SPF_HELO_PASS,T_RP_MATCHES_RCVD X-Spam-Check-By: sourceware.org Received: from mx1.redhat.com (HELO mx1.redhat.com) (209.132.183.28) by sourceware.org (qpsmtpd/0.43rc1) with ESMTP; Tue, 17 Apr 2012 14:32:24 +0000 Received: from int-mx11.intmail.prod.int.phx2.redhat.com (int-mx11.intmail.prod.int.phx2.redhat.com [10.5.11.24]) by mx1.redhat.com (8.14.4/8.14.4) with ESMTP id q3HEWOCf001437 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=OK) for ; Tue, 17 Apr 2012 10:32:24 -0400 Received: from host2.jankratochvil.net (ovpn-116-17.ams2.redhat.com [10.36.116.17]) by int-mx11.intmail.prod.int.phx2.redhat.com (8.14.4/8.14.4) with ESMTP id q3HEWKrB029424 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES128-SHA bits=128 verify=NO); Tue, 17 Apr 2012 10:32:22 -0400 Date: Tue, 17 Apr 2012 14:33:00 -0000 From: Jan Kratochvil To: Siddhesh Poyarekar Cc: Tom Tromey , gdb-patches@sourceware.org Subject: Re: [patch] Support 64-bit constants/enums on 32-bit host [Re: [PATCH] Allow 64-bit enum values] Message-ID: <20120417143219.GA25827@host2.jankratochvil.net> References: <20120220132724.GB4753@spoyarek.pnq.redhat.com> <87d397syts.fsf@fleche.redhat.com> <20120229135148.GA32128@spoyarek.pnq.redhat.com> <20120301224428.GA30631@host2.jankratochvil.net> <20120305063542.GA30196@spoyarek.pnq.redhat.com> <20120305080512.GA12311@host2.jankratochvil.net> <20120321100630.GA14496@spoyarek.pnq.redhat.com> <20120417130833.GB15356@host2.jankratochvil.net> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20120417130833.GB15356@host2.jankratochvil.net> User-Agent: Mutt/1.5.21 (2010-09-15) X-IsSubscribed: yes Mailing-List: contact gdb-patches-help@sourceware.org; run by ezmlm Precedence: bulk List-Id: List-Subscribe: List-Archive: List-Post: List-Help: , Sender: gdb-patches-owner@sourceware.org X-SW-Source: 2012-04/txt/msg00479.txt.bz2 On Tue, 17 Apr 2012 15:08:33 +0200, Jan Kratochvil wrote: > It increases memory footprint but only on 32-bit hosts compiled without > --enable-64-bit-bfd. > sizeof (struct symbol): 44 -> 48 > sizeof (struct minimal_symbol): 40 -> 44 > > BTW why we have minimal_symbol and expand it later when it has "the same" > size? Just expanding the types would have the same effect. I mixed up it here a bit as found by Tom, corrected: It increases memory footprint but only on 32-bit hosts compiled without --enable-64-bit-bfd. sizeof (struct symbol): 44 -> 48 sizeof (struct partial_symbol): 24 -> 28 sizeof (struct minimal_symbol): 40 -> 44 all three share: sizeof (struct general_symbol_info): 20 -> 24 The expansion is for partial_symbol -> symbol which may have some sense as it saves almost 50% of space, both represent one DWARF symbol. Sure minimal_symbol is never expanded it is ELF symbol. (ignoring non-ELF/non-DWARF symbol files here) Thanks, Jan