Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754051AbbBTI7c (ORCPT ); Fri, 20 Feb 2015 03:59:32 -0500 Received: from mail7.hitachi.co.jp ([133.145.228.42]:60896 "EHLO mail7.hitachi.co.jp" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752962AbbBTI7a (ORCPT ); Fri, 20 Feb 2015 03:59:30 -0500 Message-ID: <54E6F769.4020204@hitachi.com> Date: Fri, 20 Feb 2015 17:59:21 +0900 From: Masami Hiramatsu Organization: Hitachi, Ltd., Japan User-Agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:13.0) Gecko/20120614 Thunderbird/13.0.1 MIME-Version: 1.0 To: Arnaldo Carvalho de Melo Cc: Peter Zijlstra , Adrian Hunter , linux-kernel@vger.kernel.org, Ingo Molnar , Paul Mackerras , Jiri Olsa , Namhyung Kim , Borislav Petkov , Hemant Kumar Subject: Re: [perf/core PATCH v3 2/2] perf buildid-cache: Add --purge FILE to remove all caches of FILE References: <20150219080826.2167.78265.stgit@localhost.localdomain> <20150219080830.2167.89497.stgit@localhost.localdomain> In-Reply-To: <20150219080830.2167.89497.stgit@localhost.localdomain> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 8454 Lines: 266 (2015/02/19 17:08), Masami Hiramatsu wrote: > Add --purge FILE to remove all caches of FILE. > Since the current --remove FILE removes a cache which has > same build-id of given FILE. Since the command takes a > FILE path, it can confuse user who tries to remove cache > about FILE path. > > ----- > # ./perf buildid-cache -v --add ./perf > Adding 133b7b5486d987a5ab5c3ebf4ea14941f45d4d4f ./perf: Ok > # (update the ./perf binary) > # ./perf buildid-cache -v --remove ./perf > Removing 305bbd1be68f66eca7e2d78db294653031edfa79 ./perf: FAIL > ./perf wasn't in the cache > ----- > Actually, the --remove's FAIL is not shown, it just silently fails. > > So, this patch adds --purge FILE action for such usecase. > perf buildid-cache --purge FILE removes all caches which > has same FILE path. > In other words, it removes all caches including old binaries. > > ----- > # ./perf buildid-cache -v --add ./perf > Adding 133b7b5486d987a5ab5c3ebf4ea14941f45d4d4f ./perf: Ok > # (update the ./perf binary) > # ./perf buildid-cache -v --purge ./perf > Removing 133b7b5486d987a5ab5c3ebf4ea14941f45d4d4f ./perf: Ok > ----- > > BTW, if you want to purge all the caches, remove ~/.debug/* . > > Signed-off-by: Masami Hiramatsu > --- > tools/perf/Documentation/perf-buildid-cache.txt | 13 ++-- > tools/perf/builtin-buildid-cache.c | 44 ++++++++++++ > tools/perf/util/build-id.c | 83 +++++++++++++++++++---- > tools/perf/util/build-id.h | 1 > 4 files changed, 121 insertions(+), 20 deletions(-) > > diff --git a/tools/perf/Documentation/perf-buildid-cache.txt b/tools/perf/Documentation/perf-buildid-cache.txt > index cec6b57..dd07b55 100644 > --- a/tools/perf/Documentation/perf-buildid-cache.txt > +++ b/tools/perf/Documentation/perf-buildid-cache.txt > @@ -12,9 +12,9 @@ SYNOPSIS > > DESCRIPTION > ----------- > -This command manages the build-id cache. It can add and remove files to/from > -the cache. In the future it should as well purge older entries, set upper > -limits for the space used by the cache, etc. > +This command manages the build-id cache. It can add, remove, update and purge > +files to/from the cache. In the future it should as well set upper limits for > +the space used by the cache, etc. > > OPTIONS > ------- > @@ -36,7 +36,12 @@ OPTIONS > actually made. > -r:: > --remove=:: > - Remove specified file from the cache. > + Remove a cached binary which has same build-id of specified file > + from the cache. > +-p:: > +--purge=:: > + Purge all cached binaries including older caches which have specified > + path from the cache. > -M:: > --missing=:: > List missing build ids in the cache for the specified file. > diff --git a/tools/perf/builtin-buildid-cache.c b/tools/perf/builtin-buildid-cache.c > index e7568f5..37182bb 100644 > --- a/tools/perf/builtin-buildid-cache.c > +++ b/tools/perf/builtin-buildid-cache.c > @@ -223,6 +223,29 @@ static int build_id_cache__remove_file(const char *filename) > return err; > } > > +static int build_id_cache__purge_path(const char *pathname) > +{ > + struct strlist *list; > + struct str_node *pos; > + int err; > + > + list = build_id_cache__list_build_ids(pathname); > + if (!list) > + return 0; > + > + strlist__for_each(pos, list) { > + err = build_id_cache__remove_s(pos->s); > + if (verbose) > + pr_info("Removing %s %s: %s\n", pos->s, pathname, > + err ? "FAIL" : "Ok"); > + if (err) > + break; > + } > + strlist__delete(list); > + > + return err; > +} > + > static bool dso__missing_buildid_cache(struct dso *dso, int parm __maybe_unused) > { > char filename[PATH_MAX]; > @@ -285,6 +308,7 @@ int cmd_buildid_cache(int argc, const char **argv, > bool force = false; > char const *add_name_list_str = NULL, > *remove_name_list_str = NULL, > + *purge_name_list_str = NULL, > *missing_filename = NULL, > *update_name_list_str = NULL, > *kcore_filename = NULL; > @@ -302,6 +326,8 @@ int cmd_buildid_cache(int argc, const char **argv, > "file", "kcore file to add"), > OPT_STRING('r', "remove", &remove_name_list_str, "file list", > "file(s) to remove"), > + OPT_STRING('p', "purge", &purge_name_list_str, "path list", > + "path(s) to remove (remove old caches too)"), > OPT_STRING('M', "missing", &missing_filename, "file", > "to find missing build ids in the cache"), > OPT_BOOLEAN('f', "force", &force, "don't complain, do it"), > @@ -368,6 +394,24 @@ int cmd_buildid_cache(int argc, const char **argv, > } > } > > + if (purge_name_list_str) { > + list = strlist__new(true, purge_name_list_str); > + if (list) { > + strlist__for_each(pos, list) > + if (build_id_cache__purge_path(pos->s)) { > + if (errno == ENOENT) { > + pr_debug("%s wasn't in the cache\n", > + pos->s); > + continue; > + } > + pr_warning("Couldn't remove %s: %s\n", > + pos->s, strerror_r(errno, sbuf, sizeof(sbuf))); > + } > + > + strlist__delete(list); > + } > + } > + > if (missing_filename) > ret = build_id_cache__fprintf_missing(session, stdout); > > diff --git a/tools/perf/util/build-id.c b/tools/perf/util/build-id.c > index 0bc33be..b664b06 100644 > --- a/tools/perf/util/build-id.c > +++ b/tools/perf/util/build-id.c > @@ -281,35 +281,86 @@ void disable_buildid_cache(void) > no_buildid_cache = true; > } > > +static char *build_id_cache__dirname_from_path(const char *name, > + bool is_kallsyms, bool is_vdso) > +{ > + char *realname = (char *)name, *filename; > + bool slash = is_kallsyms || is_vdso; > + > + if (!slash) { > + realname = realpath(name, NULL); > + if (!realname) > + return NULL; > + } > + > + if (asprintf(&filename, "%s%s%s", buildid_dir, slash ? "/" : "", > + is_vdso ? DSO__NAME_VDSO : realname) < 0) > + filename = NULL; > + > + if (!slash) > + free(realname); > + > + return filename; > +} > + > +struct strlist *build_id_cache__list_build_ids(const char *pathname) > +{ > + struct strlist *list; > + char *dirname; > + DIR *dir; > + struct dirent *d; > + > + list = strlist__new(true, NULL); > + dirname = build_id_cache__dirname_from_path(pathname, false, false); > + if (!list || !dirname) > + goto error_free; > + > + /* List up all dirents */ > + dir = opendir(dirname); > + if (!dir) > + goto error_free; > + while ((d = readdir(dir)) != NULL) { > + if (!strcmp(d->d_name, ".") || !strcmp(d->d_name, "..")) > + continue; > + strlist__add(list, d->d_name); > + } > + closedir(dir); > + > + free(dirname); > + return list; > + > +error_free: > + free(dirname); > + if (list) > + strlist__delete(list); > + return NULL; > +} > + > int build_id_cache__add_s(const char *sbuild_id, const char *name, > bool is_kallsyms, bool is_vdso) > { > const size_t size = PATH_MAX; > - char *realname, *filename = zalloc(size), > + char *realname = NULL, *filename = NULL, > *linkname = zalloc(size), *targetname, *tmp; > - int len, err = -1; > - bool slash = is_kallsyms || is_vdso; > + int err = -1; > > - if (is_kallsyms) { > - if (symbol_conf.kptr_restrict) { > - pr_debug("Not caching a kptr_restrict'ed /proc/kallsyms\n"); > - err = 0; > - goto out_free; > - } > - realname = (char *) name; > - } else > + if (!is_kallsyms) { > realname = realpath(name, NULL); > + if (!realname) > + goto out_free; > + } > > - if (realname == NULL || filename == NULL || linkname == NULL) > + filename = build_id_cache__dirname_from_path(name, is_kallsyms, is_vdso); > + if (!filename) > goto out_free; > > - len = scnprintf(filename, size, "%s%s%s", > - buildid_dir, slash ? "/" : "", > - is_vdso ? DSO__NAME_VDSO : realname); > if (mkdir_p(filename, 0755)) > goto out_free; > > - snprintf(filename + len, size - len, "/%s", sbuild_id); > + if (asprintf(&filename, "%s/%s", filename, sbuild_id) < 0) { Oops, here is a memory leak. I'll update this. Thank you, -- Masami HIRAMATSU Software Platform Research Dept. Linux Technology Center Hitachi, Ltd., Yokohama Research Laboratory E-mail: masami.hiramatsu.pt@hitachi.com -- 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/