From mboxrd@z Thu Jan  1 00:00:00 1970
From: Jiri Olsa <jolsa@redhat.com>
Subject: Re: [PATCH v2 01/11] perf expr: unlimited escaped characters in a
 symbol
Date: Thu, 23 Apr 2020 13:29:05 +0200
Message-ID: <20200423112905.GG1136647@krava>
References: <20200422220430.254014-1-irogers@google.com>
 <20200422220430.254014-2-irogers@google.com>
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To: Ian Rogers <irogers@google.com>
Cc: Peter Zijlstra <peterz@infradead.org>, Ingo Molnar <mingo@redhat.com>, Arnaldo Carvalho de Melo <acme@kernel.org>, Mark Rutland <mark.rutland@arm.com>, Alexander Shishkin <alexander.shishkin@linux.intel.com>, Namhyung Kim <namhyung@kernel.org>, Kan Liang <kan.liang@linux.intel.com>, Andi Kleen <ak@linux.intel.com>, Haiyan Song <haiyanx.song@intel.com>, Jin Yao <yao.jin@linux.intel.com>, Song Liu <songliubraving@fb.com>, Ravi Bangoria <ravi.bangoria@linux.ibm.com>, John Garry <john.garry@huawei.com>, Leo Yan <leo.yan@linaro.org>, Adrian Hunter <adrian.hunter@intel.com>, Paul Clarke <pc@us.ibm.com>, linux-kernel@vger.kernel.org, linux-perf-users@vger.kernel.org, Stephane Eranian <eranian@google.com>
List-Id: linux-perf-users.vger.kernel.org

On Wed, Apr 22, 2020 at 03:04:20PM -0700, Ian Rogers wrote:
> Current expression allows 2 escaped '-,=' characters. However, some
> metrics require more, for example Haswell DRAM_BW_Use.
> 
> Fixes: 26226a97724d (perf expr: Move expr lexer to flex)
> Signed-off-by: Ian Rogers <irogers@google.com>
> ---
>  tools/perf/util/expr.l | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/tools/perf/util/expr.l b/tools/perf/util/expr.l
> index 2582c2464938..95bcf3629edf 100644
> --- a/tools/perf/util/expr.l
> +++ b/tools/perf/util/expr.l
> @@ -73,7 +73,7 @@ number		[0-9]+
>  sch		[-,=]
>  spec		\\{sch}
>  sym		[0-9a-zA-Z_\.:@]+
> -symbol		{spec}*{sym}*{spec}*{sym}*
> +symbol		({spec}|{sym})+

yep, much better ;-)

thanks,
jirka

>  
>  %%
>  	struct expr_scanner_ctx *sctx = expr_get_extra(yyscanner);
> -- 
> 2.26.2.303.gf8c07b1a785-goog
>