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From:   Jiri Olsa <jolsa@kernel.org>
To:     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>,
        Kajol Jain <kjain@linux.ibm.com>,
        John Garry <john.garry@huawei.com>,
        "Paul A. Clarke" <pc@us.ibm.com>,
        Stephane Eranian <eranian@google.com>
Subject: [PATCH 03/19] perf metric: Change expr__get_id to return struct expr_id_data
Date:   Sun, 19 Jul 2020 20:13:04 +0200
Message-Id: <20200719181320.785305-4-jolsa@kernel.org>
In-Reply-To: <20200719181320.785305-1-jolsa@kernel.org>
References: <20200719181320.785305-1-jolsa@kernel.org>
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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>
---
 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; }
-- 
2.25.4