linux-kernel - Re: [PATCH v3 6/8] perf/tools: Enhance JSON/metric infrastructure to handle "?"

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Message-ID: <20200302150903.GC259142@krava>
Date:   Mon, 2 Mar 2020 16:09:03 +0100
From:   Jiri Olsa <jolsa@...hat.com>
To:     Kajol Jain <kjain@...ux.ibm.com>
Cc:     acme@...nel.org, linuxppc-dev@...ts.ozlabs.org, mpe@...erman.id.au,
        sukadev@...ux.vnet.ibm.com, linux-kernel@...r.kernel.org,
        linux-perf-users@...r.kernel.org, anju@...ux.vnet.ibm.com,
        maddy@...ux.vnet.ibm.com, ravi.bangoria@...ux.ibm.com,
        peterz@...radead.org, yao.jin@...ux.intel.com, ak@...ux.intel.com,
        jolsa@...nel.org, kan.liang@...ux.intel.com, jmario@...hat.com,
        alexander.shishkin@...ux.intel.com, mingo@...nel.org,
        paulus@...abs.org, namhyung@...nel.org, mpetlan@...hat.com,
        gregkh@...uxfoundation.org, benh@...nel.crashing.org,
        mamatha4@...ux.vnet.ibm.com, mark.rutland@....com,
        tglx@...utronix.de
Subject: Re: [PATCH v3 6/8] perf/tools: Enhance JSON/metric infrastructure to
 handle "?"

On Sat, Feb 29, 2020 at 03:11:57PM +0530, Kajol Jain wrote:

SNIP

> +					*dst++ = paramval[i++];
> +				free(paramval);
> +			}
> +		}
>  		else
>  			*dst++ = *str;
>  		str++;
> @@ -72,8 +86,8 @@ number		[0-9]+
>  
>  sch		[-,=]
>  spec		\\{sch}
> -sym		[0-9a-zA-Z_\.:@]+
> -symbol		{spec}*{sym}*{spec}*{sym}*
> +sym            [0-9a-zA-Z_\.:@?]+
> +symbol         {spec}*{sym}*{spec}*{sym}*{spec}*{sym}
>  
>  %%
>  	{
> diff --git a/tools/perf/util/expr.y b/tools/perf/util/expr.y
> index 4720cbe79357..0f3ef0f37bf4 100644
> --- a/tools/perf/util/expr.y
> +++ b/tools/perf/util/expr.y
> @@ -38,6 +38,8 @@
>  %type <num> expr if_expr
>  
>  %{
> +int expr__runtimeparam;

we don't like global variables.. could this be part of the
contaxt struct?

jirka