From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from e28smtp06.in.ibm.com (e28smtp06.in.ibm.com [122.248.162.6]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (No client certificate requested) by lists.ozlabs.org (Postfix) with ESMTPS id 11CBD1A0BEB for ; Tue, 28 Apr 2015 22:06:22 +1000 (AEST) Received: from /spool/local by e28smtp06.in.ibm.com with IBM ESMTP SMTP Gateway: Authorized Use Only! Violators will be prosecuted for from ; Tue, 28 Apr 2015 17:36:20 +0530 Received: from d28relay04.in.ibm.com (d28relay04.in.ibm.com [9.184.220.61]) by d28dlp01.in.ibm.com (Postfix) with ESMTP id 12384E0056 for ; Tue, 28 Apr 2015 17:39:02 +0530 (IST) Received: from d28av05.in.ibm.com (d28av05.in.ibm.com [9.184.220.67]) by d28relay04.in.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id t3SC69aJ65929256 for ; Tue, 28 Apr 2015 17:36:10 +0530 Received: from d28av05.in.ibm.com (localhost [127.0.0.1]) by d28av05.in.ibm.com (8.14.4/8.14.4/NCO v10.0 AVout) with ESMTP id t3SC67Dn004026 for ; Tue, 28 Apr 2015 17:36:09 +0530 From: "Naveen N. Rao" To: acme@kernel.org Subject: [PATCH v3 1/7] perf probe: Improve detection of file/function name in the probe pattern Date: Tue, 28 Apr 2015 17:35:34 +0530 Message-Id: In-Reply-To: References: In-Reply-To: References: Cc: linux-kernel@vger.kernel.org, masami.hiramatsu.pt@hitachi.com, sukadev@linux.vnet.ibm.com, linuxppc-dev@lists.ozlabs.org, srikar@linux.vnet.ibm.com List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Currently, perf probe considers patterns including a '.' to be a file. However, this causes problems on powerpc ABIv1 where all functions have a leading '.': $ perf probe -F | grep schedule_timeout_interruptible .schedule_timeout_interruptible $ perf probe .schedule_timeout_interruptible Semantic error :File always requires line number or lazy pattern. Error: Command Parse Error. Fix this: - by checking the probe pattern in more detail, and - skipping leading dot if one exists when creating/deleting events. Signed-off-by: Naveen N. Rao Reviewed-by: Srikar Dronamraju --- Changes: - Folded initial part of patch 04 [now 03] into this per Masami. - Moved to using a bool file_spec and some whitespace changes. tools/perf/util/probe-event.c | 29 ++++++++++++++++++++++++++--- 1 file changed, 26 insertions(+), 3 deletions(-) diff --git a/tools/perf/util/probe-event.c b/tools/perf/util/probe-event.c index d8bb616..a8c19d5 100644 --- a/tools/perf/util/probe-event.c +++ b/tools/perf/util/probe-event.c @@ -1077,6 +1077,7 @@ static int parse_perf_probe_point(char *arg, struct perf_probe_event *pev) struct perf_probe_point *pp = &pev->point; char *ptr, *tmp; char c, nc = 0; + bool file_spec = false; /* * * perf probe [EVENT=]SRC[:LN|;PTN] @@ -1105,6 +1106,23 @@ static int parse_perf_probe_point(char *arg, struct perf_probe_event *pev) arg = tmp; } + /* + * Check arg is function or file name and copy it. + * + * We consider arg to be a file spec if and only if it satisfies + * all of the below criteria:: + * - it does not include any of "+@%", + * - it includes one of ":;", and + * - it has a period '.' in the name. + * + * Otherwise, we consider arg to be a function specification. + */ + if (!strpbrk(arg, "+@%") && (ptr = strpbrk(arg, ";:")) != NULL) { + /* This is a file spec if it includes a '.' before ; or : */ + if (memchr(arg, '.', ptr - arg)) + file_spec = true; + } + ptr = strpbrk(arg, ";:+@%"); if (ptr) { nc = *ptr; @@ -1115,10 +1133,9 @@ static int parse_perf_probe_point(char *arg, struct perf_probe_event *pev) if (tmp == NULL) return -ENOMEM; - /* Check arg is function or file and copy it */ - if (strchr(tmp, '.')) /* File */ + if (file_spec) pp->file = tmp; - else /* Function */ + else pp->function = tmp; /* Parse other options */ @@ -2265,6 +2282,9 @@ static int get_new_event_name(char *buf, size_t len, const char *base, { int i, ret; + if (*base == '.') + base++; + /* Try no suffix */ ret = e_snprintf(buf, len, "%s", base); if (ret < 0) { @@ -2751,6 +2771,9 @@ int del_perf_probe_events(struct strlist *dellist) event = str; } + if (event && *event == '.') + event++; + ret = e_snprintf(buf, 128, "%s:%s", group, event); if (ret < 0) { pr_err("Failed to copy event."); -- 2.3.5