linux-kernel - Re: [PATCH] perf tools: report initial event parsing error

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Date:   Mon, 11 Nov 2019 13:02:30 +0100
From:   Jiri Olsa <jolsa@...hat.com>
To:     Ian Rogers <irogers@...gle.com>
Cc:     Peter Zijlstra <peterz@...radead.org>,
        Ingo Molnar <mingo@...hat.com>,
        Arnaldo Carvalho de Melo <acme@...nel.org>,
        Mark Rutland <mark.rutland@....com>,
        Alexander Shishkin <alexander.shishkin@...ux.intel.com>,
        Namhyung Kim <namhyung@...nel.org>,
        Ravi Bangoria <ravi.bangoria@...ux.ibm.com>,
        Anju T Sudhakar <anju@...ux.vnet.ibm.com>,
        Christian Borntraeger <borntraeger@...ibm.com>,
        Thomas Richter <tmricht@...ux.ibm.com>,
        Andi Kleen <ak@...ux.intel.com>,
        Jin Yao <yao.jin@...ux.intel.com>,
        Allison Randal <allison@...utok.net>,
        Davidlohr Bueso <dave@...olabs.net>,
        Thomas Gleixner <tglx@...utronix.de>,
        Adrian Hunter <adrian.hunter@...el.com>,
        linux-kernel@...r.kernel.org, Stephane Eranian <eranian@...gle.com>
Subject: Re: [PATCH] perf tools: report initial event parsing error

On Fri, Nov 08, 2019 at 10:15:33AM -0800, Ian Rogers wrote:
> Record the first event parsing error and report. Implementing feedback
> from Jiri Olsa:
> https://lkml.org/lkml/2019/10/28/680
> 
> An example error is:
> 
> $ tools/perf/perf stat -e c/c/
> WARNING: multiple event parsing errors
> event syntax error: 'c/c/'
>                        \___ unknown term
> 
> valid terms: event,filter_rem,filter_opc0,edge,filter_isoc,filter_tid,filter_loc,filter_nc,inv,umask,filter_opc1,tid_en,thresh,filter_all_op,filter_not_nm,filter_state,filter_nm,config,config1,config2,name,period,percore
> 
> Initial error:
> event syntax error: 'c/c/'
>                     \___ Cannot find PMU `c'. Missing kernel support?

not sure where this got lost or if it was there before,
but the index should point to zero to have the 'arrow' aligned

jirka


---
diff --git a/tools/perf/util/parse-events.c b/tools/perf/util/parse-events.c
index a369bbc289b2..6bae9d6edc12 100644
--- a/tools/perf/util/parse-events.c
+++ b/tools/perf/util/parse-events.c
@@ -1366,7 +1366,7 @@ int parse_events_add_pmu(struct parse_events_state *parse_state,
 		if (asprintf(&err_str,
 				"Cannot find PMU `%s'. Missing kernel support?",
 				name) >= 0)
-			parse_events__handle_error(err, -1, err_str, NULL);
+			parse_events__handle_error(err, 0, err_str, NULL);
 		return -EINVAL;
 	}