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Subject: Re: [PATCH 03/19] perf metric: Change expr__get_id to return struct
 expr_id_data
To:     Jiri Olsa <jolsa@kernel.org>,
        Arnaldo Carvalho de Melo <acme@kernel.org>
Cc:     Ian Rogers <irogers@google.com>,
        lkml <linux-kernel@vger.kernel.org>,
        Ingo Molnar <mingo@kernel.org>,
        Namhyung Kim <namhyung@kernel.org>,
        Alexander Shishkin <alexander.shishkin@linux.intel.com>,
        Peter Zijlstra <a.p.zijlstra@chello.nl>,
        Michael Petlan <mpetlan@redhat.com>,
        Andi Kleen <ak@linux.intel.com>,
        John Garry <john.garry@huawei.com>,
        "Paul A. Clarke" <pc@us.ibm.com>,
        Stephane Eranian <eranian@google.com>
References: <20200719181320.785305-1-jolsa@kernel.org>
 <20200719181320.785305-4-jolsa@kernel.org>
From:   kajoljain <kjain@linux.ibm.com>
Message-ID: <c5590463-0896-fa70-4c8f-77daa67a8e88@linux.ibm.com>
Date:   Sun, 26 Jul 2020 14:47:00 +0530
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On 7/19/20 11:43 PM, Jiri Olsa wrote:
> Changing expr__get_id to use and return struct expr_id_data
> pointer as value for the ID. This way we can access data other
> than value for given ID in following changes.
> 
> Acked-by: Ian Rogers <irogers@google.com>
> Signed-off-by: Jiri Olsa <jolsa@kernel.org>
> ---

Reviewed-By : Kajol Jain<kjain@linux.ibm.com>

Thanks,
Kajol Jain

>  tools/perf/util/expr.c | 10 +++-------
>  tools/perf/util/expr.h |  3 ++-
>  tools/perf/util/expr.y | 14 +++++++++-----
>  3 files changed, 14 insertions(+), 13 deletions(-)
> 
> diff --git a/tools/perf/util/expr.c b/tools/perf/util/expr.c
> index 9228f60e2a20..4e5a6533dfce 100644
> --- a/tools/perf/util/expr.c
> +++ b/tools/perf/util/expr.c
> @@ -73,14 +73,10 @@ int expr__add_id_val(struct expr_parse_ctx *ctx, const char *id, double val)
>  	return ret;
>  }
>  
> -int expr__get_id(struct expr_parse_ctx *ctx, const char *id, double *val_ptr)
> +int expr__get_id(struct expr_parse_ctx *ctx, const char *id,
> +		 struct expr_id_data **data)
>  {
> -	struct expr_id_data *data;
> -
> -	if (!hashmap__find(&ctx->ids, id, (void **)&data))
> -		return -1;
> -	*val_ptr = (data == NULL) ?  0.0 : data->val;
> -	return 0;
> +	return hashmap__find(&ctx->ids, id, (void **)data) ? 0 : -1;
>  }
>  
>  void expr__ctx_init(struct expr_parse_ctx *ctx)
> diff --git a/tools/perf/util/expr.h b/tools/perf/util/expr.h
> index ac32cda42006..f38292fdab19 100644
> --- a/tools/perf/util/expr.h
> +++ b/tools/perf/util/expr.h
> @@ -28,7 +28,8 @@ void expr__ctx_init(struct expr_parse_ctx *ctx);
>  void expr__ctx_clear(struct expr_parse_ctx *ctx);
>  int expr__add_id(struct expr_parse_ctx *ctx, const char *id);
>  int expr__add_id_val(struct expr_parse_ctx *ctx, const char *id, double val);
> -int expr__get_id(struct expr_parse_ctx *ctx, const char *id, double *val_ptr);
> +int expr__get_id(struct expr_parse_ctx *ctx, const char *id,
> +		 struct expr_id_data **data);
>  int expr__parse(double *final_val, struct expr_parse_ctx *ctx,
>  		const char *expr, int runtime);
>  int expr__find_other(const char *expr, const char *one,
> diff --git a/tools/perf/util/expr.y b/tools/perf/util/expr.y
> index 8befe4a46f87..0d4f5d324be7 100644
> --- a/tools/perf/util/expr.y
> +++ b/tools/perf/util/expr.y
> @@ -85,12 +85,16 @@ if_expr:
>  	;
>  
>  expr:	  NUMBER
> -	| ID			{ if (expr__get_id(ctx, $1, &$$)) {
> -					pr_debug("%s not found\n", $1);
> +	| ID			{
> +					struct expr_id_data *data;
> +
> +					if (expr__get_id(ctx, $1, &data) || !data) {
> +						pr_debug("%s not found\n", $1);
> +						free($1);
> +						YYABORT;
> +					}
> +					$$ = data->val;
>  					free($1);
> -					YYABORT;
> -				  }
> -				  free($1);
>  				}
>  	| expr '|' expr		{ $$ = (long)$1 | (long)$3; }
>  	| expr '&' expr		{ $$ = (long)$1 & (long)$3; }
>