Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755481AbZGCG2k (ORCPT ); Fri, 3 Jul 2009 02:28:40 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1754233AbZGCG2d (ORCPT ); Fri, 3 Jul 2009 02:28:33 -0400 Received: from hera.kernel.org ([140.211.167.34]:58980 "EHLO hera.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754057AbZGCG2c (ORCPT ); Fri, 3 Jul 2009 02:28:32 -0400 Date: Fri, 3 Jul 2009 06:27:53 GMT From: tip-bot for Arnaldo Carvalho de Melo To: linux-tip-commits@vger.kernel.org Cc: linux-kernel@vger.kernel.org, paulus@samba.org, acme@redhat.com, hpa@zytor.com, mingo@redhat.com, a.p.zijlstra@chello.nl, efault@gmx.de, fweisbec@gmail.com, tglx@linutronix.de, mingo@elte.hu Reply-To: mingo@redhat.com, hpa@zytor.com, acme@redhat.com, paulus@samba.org, linux-kernel@vger.kernel.org, fweisbec@gmail.com, a.p.zijlstra@chello.nl, efault@gmx.de, tglx@linutronix.de, mingo@elte.hu In-Reply-To: References: Subject: [tip:perfcounters/urgent] perf_counter tools: Adjust symbols in ET_EXEC files too Message-ID: Git-Commit-ID: 30d7a77dd5a9720430af72f6f62f5156fe073e55 X-Mailer: tip-git-log-daemon MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Disposition: inline X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.0 (hera.kernel.org [127.0.0.1]); Fri, 03 Jul 2009 06:27:55 +0000 (UTC) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 5107 Lines: 130 Commit-ID: 30d7a77dd5a9720430af72f6f62f5156fe073e55 Gitweb: http://git.kernel.org/tip/30d7a77dd5a9720430af72f6f62f5156fe073e55 Author: Arnaldo Carvalho de Melo AuthorDate: Thu, 2 Jul 2009 21:24:14 -0300 Committer: Ingo Molnar CommitDate: Fri, 3 Jul 2009 08:24:13 +0200 perf_counter tools: Adjust symbols in ET_EXEC files too Ingo Molnar wrote: > i just bisected a 'perf report' bug that would cause us to not > resolve all user-space symbols in a 'git gc' run to: > > f5812a7a336fb952d819e4427b9a2dce02368e82 is first bad commit > commit f5812a7a336fb952d819e4427b9a2dce02368e82 > Author: Arnaldo Carvalho de Melo > Date: Tue Jun 30 11:43:17 2009 -0300 > > perf_counter tools: Adjust only prelinked symbol's addresses Rename ->prelinked to ->adjust_symbols and making what was done only for prelinked libraries also to ET_EXEC binaries, such as /usr/bin/git: [acme@doppio pahole]$ readelf -h /usr/bin/git | grep Type Type: EXEC (Executable file) [acme@doppio pahole]$ And after installing the 'git-debuginfo' package, I get correct results: [acme@doppio linux-2.6-tip]$ perf report --sort comm,dso,symbol -d /usr/bin/git | head -20 # # (1139614 samples) # # Overhead Command Shared Object Symbol # ........ ................ ......................... ...... # 34.98% git /usr/bin/git [.] send_sideband 33.39% git /usr/bin/git [.] enter_repo 6.81% git /usr/bin/git [.] diff_opt_parse 4.95% git /usr/bin/git [.] is_repository_shallow 3.24% git /usr/bin/git [.] odb_mkstemp 1.39% git /usr/bin/git [.] output 1.34% git /usr/bin/git [.] xmmap 1.25% git /usr/bin/git [.] receive_pack_config 1.16% git /usr/bin/git [.] git_pathdup 0.90% git /usr/bin/git [.] read_object_with_reference 0.86% git /usr/bin/git [.] show_patch_diff 0.85% git /usr/bin/git 0x00000000095e2e 0.69% git /usr/bin/git [.] display [acme@doppio linux-2.6-tip]$ I'll check what are the last cases where we can't resolve symbols, like this 0x00000000095e2e later. And I guess this will fix the problems Mike were seeing too: [acme@doppio linux-2.6-tip]$ readelf -h ../build/perf/vmlinux | grep Type Type: EXEC (Executable file) [acme@doppio linux-2.6-tip]$ Cc: Peter Zijlstra Cc: Mike Galbraith Cc: Paul Mackerras Cc: Frederic Weisbecker LKML-Reference: Signed-off-by: Ingo Molnar --- tools/perf/util/symbol.c | 11 ++++++----- tools/perf/util/symbol.h | 2 +- 2 files changed, 7 insertions(+), 6 deletions(-) diff --git a/tools/perf/util/symbol.c b/tools/perf/util/symbol.c index 98a1311..4683b67 100644 --- a/tools/perf/util/symbol.c +++ b/tools/perf/util/symbol.c @@ -555,9 +555,10 @@ static int dso__load_sym(struct dso *self, int fd, const char *name, nr_syms = shdr.sh_size / shdr.sh_entsize; memset(&sym, 0, sizeof(sym)); - self->prelinked = elf_section_by_name(elf, &ehdr, &shdr, - ".gnu.prelink_undo", - NULL) != NULL; + self->adjust_symbols = (ehdr.e_type == ET_EXEC || + elf_section_by_name(elf, &ehdr, &shdr, + ".gnu.prelink_undo", + NULL) != NULL); elf_symtab__for_each_symbol(syms, nr_syms, index, sym) { struct symbol *f; u64 obj_start; @@ -580,7 +581,7 @@ static int dso__load_sym(struct dso *self, int fd, const char *name, section_name = elf_sec__name(&shdr, secstrs); obj_start = sym.st_value; - if (self->prelinked) { + if (self->adjust_symbols) { if (verbose >= 2) printf("adjusting symbol: st_value: %Lx sh_addr: %Lx sh_offset: %Lx\n", (u64)sym.st_value, (u64)shdr.sh_addr, (u64)shdr.sh_offset); @@ -632,7 +633,7 @@ int dso__load(struct dso *self, symbol_filter_t filter, int verbose) if (!name) return -1; - self->prelinked = 0; + self->adjust_symbols = 0; if (strncmp(self->name, "/tmp/perf-", 10) == 0) return dso__load_perf_map(self, filter, verbose); diff --git a/tools/perf/util/symbol.h b/tools/perf/util/symbol.h index 4e141a3..7918cff 100644 --- a/tools/perf/util/symbol.h +++ b/tools/perf/util/symbol.h @@ -24,7 +24,7 @@ struct dso { struct rb_root syms; struct symbol *(*find_symbol)(struct dso *, u64 ip); unsigned int sym_priv_size; - unsigned char prelinked; + unsigned char adjust_symbols; char name[0]; }; -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/