Re: [PATCH 03/19] perf metric: Change expr__get_id to return struct expr_id_data

kajoljain
2020-07-26T09:17:16Z

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; }
>