Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S965519AbbDWNts (ORCPT ); Thu, 23 Apr 2015 09:49:48 -0400 Received: from mail7.hitachi.co.jp ([133.145.228.42]:37291 "EHLO mail7.hitachi.co.jp" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S964927AbbDWNsb (ORCPT ); Thu, 23 Apr 2015 09:48:31 -0400 X-AuditID: 85900ec0-a14c8b9000003d4c-f8-5538f8205547 Subject: [PATCH perf/core v2 5/8] perf probe: Allow to use filter on --del command From: Masami Hiramatsu To: Arnaldo Carvalho de Melo Cc: Peter Zijlstra , Linux Kernel Mailing List , David Ahern , namhyung@kernel.org, Jiri Olsa , Ingo Molnar Date: Thu, 23 Apr 2015 22:46:21 +0900 Message-ID: <20150423134621.26128.27423.stgit@localhost.localdomain> In-Reply-To: <20150423134610.26128.82557.stgit@localhost.localdomain> References: <20150423134610.26128.82557.stgit@localhost.localdomain> User-Agent: StGit/0.17.1-dirty MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit X-Brightmail-Tracker: AAAAAA== Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 9406 Lines: 342 This makes perf-probe --del option to accept filter rules not only simple glob pattern. This simplifies the code and improve the flexibility. E.g. if we remove 2 different pattern events, we need 2 -d options. ---- # ./perf probe -d vfs\* -d malloc Removed event: probe_libc:malloc Removed event: probe:vfs_read ---- This allows you to joint the 2 patterns with '|'. ---- # ./perf probe -d 'vfs*|malloc' Removed event: probe:vfs_read Removed event: probe_libc:malloc ---- Signed-off-by: Masami Hiramatsu --- tools/perf/builtin-probe.c | 16 ++----- tools/perf/util/probe-event.c | 99 +++++++++++++---------------------------- tools/perf/util/probe-event.h | 2 - tools/perf/util/strfilter.c | 67 ++++++++++++++++++++++++++++ tools/perf/util/strfilter.h | 9 ++++ 5 files changed, 115 insertions(+), 78 deletions(-) diff --git a/tools/perf/builtin-probe.c b/tools/perf/builtin-probe.c index feca316..1f41b4e 100644 --- a/tools/perf/builtin-probe.c +++ b/tools/perf/builtin-probe.c @@ -55,12 +55,12 @@ static struct { bool show_ext_vars; bool show_funcs; bool mod_events; + bool del_events; bool uprobes; bool quiet; bool target_used; int nevents; struct perf_probe_event events[MAX_PROBES]; - struct strlist *dellist; struct line_range line_range; char *target; int max_probe_points; @@ -195,10 +195,8 @@ static int opt_del_probe_event(const struct option *opt __maybe_unused, const char *str, int unset __maybe_unused) { if (str) { - params.mod_events = true; - if (!params.dellist) - params.dellist = strlist__new(true, NULL); - strlist__add(params.dellist, str); + params.del_events = true; + return params_add_filter(str); } return 0; } @@ -313,8 +311,6 @@ static void cleanup_params(void) for (i = 0; i < params.nevents; i++) clear_perf_probe_event(params.events + i); - if (params.dellist) - strlist__delete(params.dellist); line_range__clear(¶ms.line_range); free(params.target); if (params.filter) @@ -454,7 +450,7 @@ __cmd_probe(int argc, const char **argv, const char *prefix __maybe_unused) if (params.max_probe_points == 0) params.max_probe_points = MAX_PROBES; - if ((!params.nevents && !params.dellist && !params.list_events && + if ((!params.nevents && !params.del_events && !params.list_events && !params.show_lines && !params.show_funcs)) usage_with_options(probe_usage, options); @@ -514,8 +510,8 @@ __cmd_probe(int argc, const char **argv, const char *prefix __maybe_unused) } #endif - if (params.dellist) { - ret = del_perf_probe_events(params.dellist); + if (params.del_events) { + ret = del_perf_probe_events(params.filter); if (ret < 0) { pr_err_with_code(" Error: Failed to delete events.", ret); return ret; diff --git a/tools/perf/util/probe-event.c b/tools/perf/util/probe-event.c index acd9ec8..4fdb38c 100644 --- a/tools/perf/util/probe-event.c +++ b/tools/perf/util/probe-event.c @@ -2701,40 +2701,39 @@ error: return ret; } -static int del_trace_probe_event(int fd, const char *buf, - struct strlist *namelist) +static int del_trace_probe_events(int fd, struct strfilter *filter, + struct strlist *namelist) { - struct str_node *ent, *n; + struct str_node *ent; + const char *p; int ret = -ENOENT; - if (strpbrk(buf, "*?")) { /* Glob-exp */ - strlist__for_each_safe(ent, n, namelist) - if (strglobmatch(ent->s, buf)) { - ret = __del_trace_probe_event(fd, ent); - if (ret < 0) - break; - strlist__remove(namelist, ent); - } - } else { - ent = strlist__find(namelist, buf); - if (ent) { + if (!namelist) + return -ENOENT; + + strlist__for_each(ent, namelist) { + p = strchr(ent->s, ':'); + if ((p && strfilter__compare(filter, p + 1)) || + strfilter__compare(filter, ent->s)) { ret = __del_trace_probe_event(fd, ent); - if (ret >= 0) - strlist__remove(namelist, ent); + if (ret < 0) + break; } } return ret; } -int del_perf_probe_events(struct strlist *dellist) +int del_perf_probe_events(struct strfilter *filter) { - int ret = -1, ret2, ufd = -1, kfd = -1; - char buf[128]; - const char *group, *event; - char *p, *str; - struct str_node *ent; + int ret, ret2, ufd = -1, kfd = -1; struct strlist *namelist = NULL, *unamelist = NULL; + char *str = strfilter__string(filter); + + if (!str) + return -EINVAL; + + pr_debug("Delete filter: \'%s\'\n", str); /* Get current event names */ kfd = open_kprobe_events(true); @@ -2747,56 +2746,21 @@ int del_perf_probe_events(struct strlist *dellist) if (kfd < 0 && ufd < 0) { print_both_open_warning(kfd, ufd); + ret = kfd; goto error; } - if (namelist == NULL && unamelist == NULL) { - ret = -ENOENT; + ret = del_trace_probe_events(kfd, filter, namelist); + if (ret < 0 && ret != -ENOENT) goto error; - } - strlist__for_each(ent, dellist) { - str = strdup(ent->s); - if (str == NULL) { - ret = -ENOMEM; - goto error; - } - pr_debug("Parsing: %s\n", str); - p = strchr(str, ':'); - if (p) { - group = str; - *p = '\0'; - event = p + 1; - } else { - group = "*"; - event = str; - } - - ret = e_snprintf(buf, 128, "%s:%s", group, event); - if (ret < 0) { - pr_err("Failed to copy event."); - free(str); - goto error; - } - - pr_debug("Group: %s, Event: %s\n", group, event); - free(str); - - ret = ret2 = -ENOENT; - if (namelist) - ret = del_trace_probe_event(kfd, buf, namelist); - - if ((ret >= 0 || ret == -ENOENT) && unamelist) - ret2 = del_trace_probe_event(ufd, buf, unamelist); - - /* Since we can remove probes which already removed, don't check it */ - if (ret == -ENOENT && ret2 == -ENOENT) - pr_debug("Event \"%s\" does not exist.\n", buf); - else if (ret < 0 || ret2 < 0) { - if (ret >= 0) - ret = ret2; - break; - } + ret2 = del_trace_probe_events(ufd, filter, unamelist); + if (ret2 < 0 && ret2 != -ENOENT) + ret = ret2; + else if (ret == -ENOENT && ret2 == -ENOENT) { + pr_debug("\"%s\" does not hit any event.\n", str); + /* Note that this is silently ignored */ + ret = 0; } error: @@ -2809,6 +2773,7 @@ error: strlist__delete(unamelist); close(ufd); } + free(str); return ret; } diff --git a/tools/perf/util/probe-event.h b/tools/perf/util/probe-event.h index 819e825..027356f 100644 --- a/tools/perf/util/probe-event.h +++ b/tools/perf/util/probe-event.h @@ -126,7 +126,7 @@ extern const char *kernel_get_module_path(const char *module); extern int add_perf_probe_events(struct perf_probe_event *pevs, int npevs, int max_probe_points, bool force_add); -extern int del_perf_probe_events(struct strlist *dellist); +extern int del_perf_probe_events(struct strfilter *filter); extern int show_perf_probe_events(struct strfilter *filter); extern int show_line_range(struct line_range *lr, const char *module, bool user); diff --git a/tools/perf/util/strfilter.c b/tools/perf/util/strfilter.c index cd659e6..addb6cb 100644 --- a/tools/perf/util/strfilter.c +++ b/tools/perf/util/strfilter.c @@ -231,3 +231,70 @@ bool strfilter__compare(struct strfilter *filter, const char *str) return false; return strfilter_node__compare(filter->root, str); } + +static int strfilter_node__sprint(struct strfilter_node *node, char *buf); + +/* sprint node in parenthesis if needed */ +static int strfilter_node__sprint_pt(struct strfilter_node *node, char *buf) +{ + int len; + int pt = node->r ? 2 : 0; /* don't need to check node->l */ + + if (buf && pt) + *buf++ = '('; + len = strfilter_node__sprint(node, buf); + if (len < 0) + return len; + if (buf && pt) + *(buf + len) = ')'; + return len + pt; +} + +static int strfilter_node__sprint(struct strfilter_node *node, char *buf) +{ + int len = 0, rlen; + + if (!node || !node->p) + return -EINVAL; + + switch (*node->p) { + case '|': + case '&': + len = strfilter_node__sprint_pt(node->l, buf); + if (len < 0) + return len; + case '!': + if (buf) { + *(buf + len++) = *node->p; + buf += len; + } else + len++; + rlen = strfilter_node__sprint_pt(node->r, buf); + if (rlen < 0) + return rlen; + len += rlen; + break; + default: + len = strlen(node->p); + if (buf) + strcpy(buf, node->p); + } + + return len; +} + +char *strfilter__string(struct strfilter *filter) +{ + int len; + char *ret = NULL; + + len = strfilter_node__sprint(filter->root, NULL); + if (len < 0) + return NULL; + + ret = malloc(len + 1); + if (ret) + strfilter_node__sprint(filter->root, ret); + + return ret; +} diff --git a/tools/perf/util/strfilter.h b/tools/perf/util/strfilter.h index c81ff97..d0b772c 100644 --- a/tools/perf/util/strfilter.h +++ b/tools/perf/util/strfilter.h @@ -58,4 +58,13 @@ bool strfilter__compare(struct strfilter *filter, const char *str); */ void strfilter__delete(struct strfilter *filter); +/** + * strfilter__string - Reconstruct a rule string from filter + * @filter: String filter to reconstruct + * + * Reconstruct a rule string from @filter. This will be good for + * debug messages. Note that returning string must be freed afterward. + */ +char *strfilter__string(struct strfilter *filter); + #endif -- 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/