From owner-svn-src-all@freebsd.org Wed Jun 26 16:38:31 2019 Return-Path: Delivered-To: svn-src-all@mailman.ysv.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2610:1c1:1:606c::19:1]) by mailman.ysv.freebsd.org (Postfix) with ESMTP id 76EB615CC8D6; Wed, 26 Jun 2019 16:38:31 +0000 (UTC) (envelope-from markj@FreeBSD.org) Received: from mxrelay.nyi.freebsd.org (mxrelay.nyi.freebsd.org [IPv6:2610:1c1:1:606c::19:3]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) server-signature RSA-PSS (4096 bits) client-signature RSA-PSS (4096 bits) client-digest SHA256) (Client CN "mxrelay.nyi.freebsd.org", Issuer "Let's Encrypt Authority X3" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id 18DDC750D6; Wed, 26 Jun 2019 16:38:31 +0000 (UTC) (envelope-from markj@FreeBSD.org) Received: from repo.freebsd.org (repo.freebsd.org [IPv6:2610:1c1:1:6068::e6a:0]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (Client did not present a certificate) by mxrelay.nyi.freebsd.org (Postfix) with ESMTPS id D6C2A2458; Wed, 26 Jun 2019 16:38:30 +0000 (UTC) (envelope-from markj@FreeBSD.org) Received: from repo.freebsd.org ([127.0.1.37]) by repo.freebsd.org (8.15.2/8.15.2) with ESMTP id x5QGcUU8051234; Wed, 26 Jun 2019 16:38:30 GMT (envelope-from markj@FreeBSD.org) Received: (from markj@localhost) by repo.freebsd.org (8.15.2/8.15.2/Submit) id x5QGcUac051233; Wed, 26 Jun 2019 16:38:30 GMT (envelope-from markj@FreeBSD.org) Message-Id: <201906261638.x5QGcUac051233@repo.freebsd.org> X-Authentication-Warning: repo.freebsd.org: markj set sender to markj@FreeBSD.org using -f From: Mark Johnston Date: Wed, 26 Jun 2019 16:38:30 +0000 (UTC) To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org Subject: svn commit: r349424 - head/contrib/elftoolchain/libdwarf X-SVN-Group: head X-SVN-Commit-Author: markj X-SVN-Commit-Paths: head/contrib/elftoolchain/libdwarf X-SVN-Commit-Revision: 349424 X-SVN-Commit-Repository: base MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit X-Rspamd-Queue-Id: 18DDC750D6 X-Spamd-Bar: -- Authentication-Results: mx1.freebsd.org X-Spamd-Result: default: False [-2.96 / 15.00]; local_wl_from(0.00)[FreeBSD.org]; NEURAL_HAM_MEDIUM(-1.00)[-0.999,0]; NEURAL_HAM_LONG(-1.00)[-1.000,0]; NEURAL_HAM_SHORT(-0.96)[-0.956,0]; ASN(0.00)[asn:11403, ipnet:2610:1c1:1::/48, country:US] X-BeenThere: svn-src-all@freebsd.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: "SVN commit messages for the entire src tree \(except for " user" and " projects" \)" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 26 Jun 2019 16:38:31 -0000 Author: markj Date: Wed Jun 26 16:38:30 2019 New Revision: 349424 URL: https://svnweb.freebsd.org/changeset/base/349424 Log: libdwarf: Use the cached strtab pointer when reading string attributes. Previously we would perform a linear search of the DWARF section list for ".debug_str". However, libdwarf always caches a pointer to the strtab image in its debug descriptor. Using it gives a modest performance improvement when iterating over the attributes of each DIE. Reviewed by: emaste MFC after: 1 week Sponsored by: The FreeBSD Foundation Differential Revision: https://reviews.freebsd.org/D20759 Modified: head/contrib/elftoolchain/libdwarf/libdwarf_attr.c Modified: head/contrib/elftoolchain/libdwarf/libdwarf_attr.c ============================================================================== --- head/contrib/elftoolchain/libdwarf/libdwarf_attr.c Wed Jun 26 16:35:37 2019 (r349423) +++ head/contrib/elftoolchain/libdwarf/libdwarf_attr.c Wed Jun 26 16:38:30 2019 (r349424) @@ -100,7 +100,6 @@ _dwarf_attr_init(Dwarf_Debug dbg, Dwarf_Section *ds, u uint64_t form, int indirect, Dwarf_Error *error) { struct _Dwarf_Attribute atref; - Dwarf_Section *str; int ret; ret = DW_DLE_NONE; @@ -183,9 +182,7 @@ _dwarf_attr_init(Dwarf_Debug dbg, Dwarf_Section *ds, u break; case DW_FORM_strp: atref.u[0].u64 = dbg->read(ds->ds_data, offsetp, dwarf_size); - str = _dwarf_find_section(dbg, ".debug_str"); - assert(str != NULL); - atref.u[1].s = (char *) str->ds_data + atref.u[0].u64; + atref.u[1].s = _dwarf_strtab_get_table(dbg) + atref.u[0].u64; break; case DW_FORM_ref_sig8: atref.u[0].u64 = 8;