From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (qmail 18949 invoked by alias); 15 Dec 2009 15:28:20 -0000 Received: (qmail 18801 invoked by uid 22791); 15 Dec 2009 15:28:18 -0000 X-SWARE-Spam-Status: No, hits=-2.5 required=5.0 tests=AWL,BAYES_00,FS_TIP_DDD,SPF_HELO_PASS,SPF_PASS 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, 15 Dec 2009 15:28:14 +0000 Received: from int-mx05.intmail.prod.int.phx2.redhat.com (int-mx05.intmail.prod.int.phx2.redhat.com [10.5.11.18]) by mx1.redhat.com (8.13.8/8.13.8) with ESMTP id nBFFSCIi029198 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=OK) for ; Tue, 15 Dec 2009 10:28:12 -0500 Received: from dhcp-100-2-132.bos.redhat.com (dhcp-100-2-132.bos.redhat.com [10.16.2.132]) by int-mx05.intmail.prod.int.phx2.redhat.com (8.13.8/8.13.8) with ESMTP id nBFFSA5w017308; Tue, 15 Dec 2009 10:28:10 -0500 From: Masami Hiramatsu Subject: [PATCH -tip 14/14] perf probe: Fix to show which probe point is not found To: Ingo Molnar , Frederic Weisbecker , lkml Cc: Paul Mackerras , Arnaldo Carvalho de Melo , Steven Rostedt , Jim Keniston , Ananth N Mavinakayanahalli , Christoph Hellwig , "Frank Ch. Eigler" , Jason Baron , "K.Prasad" , Peter Zijlstra , Srikar Dronamraju , systemtap, DLE Date: Tue, 15 Dec 2009 15:28:00 -0000 Message-ID: <20091215153247.17436.49068.stgit@dhcp-100-2-132.bos.redhat.com> In-Reply-To: <20091215153106.17436.66584.stgit@dhcp-100-2-132.bos.redhat.com> References: <20091215153106.17436.66584.stgit@dhcp-100-2-132.bos.redhat.com> User-Agent: StGIT/0.14.3 MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit X-IsSubscribed: yes Mailing-List: contact systemtap-help@sourceware.org; run by ezmlm Precedence: bulk List-Id: List-Subscribe: List-Post: List-Help: , Sender: systemtap-owner@sourceware.org X-SW-Source: 2009-q4/txt/msg00923.txt.bz2 Fix perf probe to show which probe point is not found. With out this patch, it shows just "No probe point found." This doesn't help users if they specify several probes. e.g. # perf probe -f --add schedule --add test Fatal: No probe point found. This patch makes error message more helpful as below. # perf probe --add schedule --add test Fatal: Probe point 'test' not found. - probe not added. Signed-off-by: Masami Hiramatsu Cc: Ingo Molnar Cc: Paul Mackerras Cc: Arnaldo Carvalho de Melo Cc: Steven Rostedt Cc: Jim Keniston Cc: Ananth N Mavinakayanahalli Cc: Christoph Hellwig Cc: Frank Ch. Eigler Cc: Frederic Weisbecker Cc: Jason Baron Cc: K.Prasad Cc: Peter Zijlstra Cc: Srikar Dronamraju --- tools/perf/builtin-probe.c | 7 +++++-- tools/perf/util/probe-event.c | 34 ++++++++++++++++++++++++---------- tools/perf/util/probe-event.h | 1 + 3 files changed, 30 insertions(+), 12 deletions(-) diff --git a/tools/perf/builtin-probe.c b/tools/perf/builtin-probe.c index f019536..beb49e3 100644 --- a/tools/perf/builtin-probe.c +++ b/tools/perf/builtin-probe.c @@ -265,8 +265,11 @@ int cmd_probe(int argc, const char **argv, const char *prefix __used) ret = find_probepoint(fd, pp); if (ret > 0) continue; - if (ret == 0) /* No error but failed to find probe point. */ - die("No probe point found."); + if (ret == 0) { /* No error but failed to find probe point. */ + synthesize_perf_probe_point(pp); + die("Probe point '%s' not found. - probe not added.", + pp->probes[0]); + } /* Error path */ if (session.need_dwarf) { if (ret == -ENOENT) diff --git a/tools/perf/util/probe-event.c b/tools/perf/util/probe-event.c index e74ecfc..3c2e743 100644 --- a/tools/perf/util/probe-event.c +++ b/tools/perf/util/probe-event.c @@ -249,11 +249,12 @@ void parse_trace_kprobe_event(const char *str, struct probe_point *pp) argv_free(argv); } -int synthesize_perf_probe_event(struct probe_point *pp) +/* Synthesize only probe point (not argument) */ +int synthesize_perf_probe_point(struct probe_point *pp) { char *buf; char offs[64] = "", line[64] = ""; - int i, len, ret; + int ret; pp->probes[0] = buf = zalloc(MAX_CMDLEN); if (!buf) @@ -274,10 +275,24 @@ int synthesize_perf_probe_event(struct probe_point *pp) offs, pp->retprobe ? "%return" : "", line); else ret = e_snprintf(buf, MAX_CMDLEN, "%s%s", pp->file, line); - if (ret <= 0) - goto error; - len = ret; + if (ret <= 0) { +error: + free(pp->probes[0]); + pp->probes[0] = NULL; + } + return ret; +} + +int synthesize_perf_probe_event(struct probe_point *pp) +{ + char *buf; + int i, len, ret; + len = synthesize_perf_probe_point(pp); + if (len < 0) + return 0; + + buf = pp->probes[0]; for (i = 0; i < pp->nr_args; i++) { ret = e_snprintf(&buf[len], MAX_CMDLEN - len, " %s", pp->args[i]); @@ -290,6 +305,7 @@ int synthesize_perf_probe_event(struct probe_point *pp) return pp->found; error: free(pp->probes[0]); + pp->probes[0] = NULL; return ret; } @@ -319,6 +335,7 @@ int synthesize_trace_kprobe_event(struct probe_point *pp) return pp->found; error: free(pp->probes[0]); + pp->probes[0] = NULL; return ret; } @@ -418,7 +435,7 @@ static void show_perf_probe_event(const char *event, const char *place, /* List up current perf-probe events */ void show_perf_probe_events(void) { - int fd, nr; + int fd; struct probe_point pp; struct strlist *rawlist; struct str_node *ent; @@ -430,10 +447,7 @@ void show_perf_probe_events(void) strlist__for_each(ent, rawlist) { parse_trace_kprobe_event(ent->s, &pp); /* Synthesize only event probe point */ - nr = pp.nr_args; - pp.nr_args = 0; - synthesize_perf_probe_event(&pp); - pp.nr_args = nr; + synthesize_perf_probe_point(&pp); /* Show an event */ show_perf_probe_event(pp.event, pp.probes[0], &pp); clear_probe_point(&pp); diff --git a/tools/perf/util/probe-event.h b/tools/perf/util/probe-event.h index 8fd3052..7f1d499 100644 --- a/tools/perf/util/probe-event.h +++ b/tools/perf/util/probe-event.h @@ -7,6 +7,7 @@ extern void parse_perf_probe_event(const char *str, struct probe_point *pp, bool *need_dwarf); +extern int synthesize_perf_probe_point(struct probe_point *pp); extern int synthesize_perf_probe_event(struct probe_point *pp); extern void parse_trace_kprobe_event(const char *str, struct probe_point *pp); extern int synthesize_trace_kprobe_event(struct probe_point *pp); -- Masami Hiramatsu Software Engineer Hitachi Computer Products (America), Inc. Software Solutions Division e-mail: mhiramat@redhat.com