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AJvYcCX6a40pVP0uwfkwuC+4ZPDsKe92ji2u8Ovj/rDIRtjg9gDc2hsJPMW6naHAq7bQDvL3ejDYKEn02n4p+Qgv8e6MT03oKZYvkXBJMAifWa70 X-Gm-Message-State: AOJu0Yw+f6bf7YAnwrgEOFFBEPahjCD1nSVTSLLO/lUbm3O8YjkUQZ+s MPRLaqxb3jqM9mMOKkaOqTw7U8g3Kybyja9YK0d8PxMlN2sV8fQ7LE4yxQL8/09pmwb3EvQg4VT WCTj2nw== X-Google-Smtp-Source: AGHT+IHU62mxVZT/57o8lZIqos+5GU3yfPQj1+CocC7s8g9X2ZXqugU/fUPUNRs0dJBS3aK51ZiyqFZ/eNM7 X-Received: from irogers.svl.corp.google.com ([2620:15c:2a3:200:30c8:f541:acad:b4f7]) (user=irogers job=sendgmr) by 2002:a05:6902:154f:b0:dbe:d0a9:2be3 with SMTP id r15-20020a056902154f00b00dbed0a92be3mr573082ybu.3.1713248181960; Mon, 15 Apr 2024 23:16:21 -0700 (PDT) Date: Mon, 15 Apr 2024 23:15:32 -0700 In-Reply-To: <20240416061533.921723-1-irogers@google.com> Message-Id: <20240416061533.921723-17-irogers@google.com> Mime-Version: 1.0 References: <20240416061533.921723-1-irogers@google.com> X-Mailer: git-send-email 2.44.0.683.g7961c838ac-goog Subject: [PATCH v2 16/16] perf parse-events: Tidy the setting of the default event name From: Ian Rogers To: Peter Zijlstra , Ingo Molnar , Arnaldo Carvalho de Melo , Namhyung Kim , Mark Rutland , Alexander Shishkin , Jiri Olsa , Ian Rogers , Adrian Hunter , Kan Liang , James Clark , linux-perf-users@vger.kernel.org, linux-kernel@vger.kernel.org, bpf@vger.kernel.org, Atish Patra , linux-riscv@lists.infradead.org, Beeman Strong X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20240415_231624_472702_F4BE81AE X-CRM114-Status: GOOD ( 17.91 ) X-BeenThere: linux-riscv@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-riscv" Errors-To: linux-riscv-bounces+linux-riscv=archiver.kernel.org@lists.infradead.org Add comments. Pass ownership of the event name to save on a strdup. Signed-off-by: Ian Rogers --- tools/perf/util/parse-events.c | 9 ++++++--- tools/perf/util/parse-events.h | 2 +- tools/perf/util/parse-events.l | 5 +++++ tools/perf/util/parse-events.y | 10 +++++++--- 4 files changed, 19 insertions(+), 7 deletions(-) diff --git a/tools/perf/util/parse-events.c b/tools/perf/util/parse-events.c index 1c1b1bcb78e8..0f308b4db2b9 100644 --- a/tools/perf/util/parse-events.c +++ b/tools/perf/util/parse-events.c @@ -1836,18 +1836,21 @@ int parse_events__modifier_event(struct parse_events_state *parse_state, void *l return parse_events__modifier_list(parse_state, loc, list, mod, /*group=*/false); } -int parse_events_name(struct list_head *list, const char *name) +int parse_events__set_default_name(struct list_head *list, char *name) { struct evsel *evsel; + bool used_name = false; __evlist__for_each_entry(list, evsel) { if (!evsel->name) { - evsel->name = strdup(name); + evsel->name = used_name ? strdup(name) : name; + used_name = true; if (!evsel->name) return -ENOMEM; } } - + if (!used_name) + free(name); return 0; } diff --git a/tools/perf/util/parse-events.h b/tools/perf/util/parse-events.h index 0bb5f0c80a5e..5695308efab9 100644 --- a/tools/perf/util/parse-events.h +++ b/tools/perf/util/parse-events.h @@ -207,7 +207,7 @@ int parse_events__modifier_event(struct parse_events_state *parse_state, void *l struct list_head *list, struct parse_events_modifier mod); int parse_events__modifier_group(struct parse_events_state *parse_state, void *loc, struct list_head *list, struct parse_events_modifier mod); -int parse_events_name(struct list_head *list, const char *name); +int parse_events__set_default_name(struct list_head *list, char *name); int parse_events_add_tracepoint(struct list_head *list, int *idx, const char *sys, const char *event, struct parse_events_error *error, diff --git a/tools/perf/util/parse-events.l b/tools/perf/util/parse-events.l index 4aaf0c53d9b6..08ea2d845dc3 100644 --- a/tools/perf/util/parse-events.l +++ b/tools/perf/util/parse-events.l @@ -96,6 +96,11 @@ static int drv_str(yyscan_t scanner, int token) return token; } +/* + * Use yyless to return all the characaters to the input. Update the column for + * location debugging. If __alloc is non-zero set yylval to the text for the + * returned token's value. + */ #define REWIND(__alloc) \ do { \ YYSTYPE *__yylval = parse_events_get_lval(yyscanner); \ diff --git a/tools/perf/util/parse-events.y b/tools/perf/util/parse-events.y index 6f1042272dda..68b3b06c7ff0 100644 --- a/tools/perf/util/parse-events.y +++ b/tools/perf/util/parse-events.y @@ -247,10 +247,14 @@ event_name event_name: PE_EVENT_NAME event_def { - int err; + /* + * When an event is parsed the text is rewound and the entire text of + * the event is set to the str of PE_EVENT_NAME token matched here. If + * no name was on an event via a term, set the name to the entire text + * taking ownership of the allocation. + */ + int err = parse_events__set_default_name($2, $1); - err = parse_events_name($2, $1); - free($1); if (err) { free_list_evsel($2); YYNOMEM;