linux-kernel - [PATCH v4 6/8] perf auxtrace: Bails out after finding the event for the map index

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-Id: <20240809121447.2078084-7-leo.yan@arm.com>
Date: Fri,  9 Aug 2024 13:14:45 +0100
From: Leo Yan <leo.yan@....com>
To: Peter Zijlstra <peterz@...radead.org>,
	Arnaldo Carvalho de Melo <acme@...nel.org>,
	Ingo Molnar <mingo@...hat.com>,
	Namhyung Kim <namhyung@...nel.org>,
	Ian Rogers <irogers@...gle.com>,
	Adrian Hunter <adrian.hunter@...el.com>,
	"Liang, Kan" <kan.liang@...ux.intel.com>,
	Suzuki K Poulose <suzuki.poulose@....com>,
	Mike Leach <mike.leach@...aro.org>,
	James Clark <james.clark@...aro.org>,
	linux-perf-users@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	coresight@...ts.linaro.org,
	linux-arm-kernel@...ts.infradead.org
Cc: Leo Yan <leo.yan@....com>
Subject: [PATCH v4 6/8] perf auxtrace: Bails out after finding the event for the map index

After finding the corresponding event for the passed buffer index, it is
safe to say the found event has been used. Then, the tool can check the
event status and bails out if it has been disabled.

Signed-off-by: Leo Yan <leo.yan@....com>
---
 tools/perf/util/auxtrace.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/tools/perf/util/auxtrace.c b/tools/perf/util/auxtrace.c
index c970024f16db..ac6e2e428a66 100644
--- a/tools/perf/util/auxtrace.c
+++ b/tools/perf/util/auxtrace.c
@@ -688,15 +688,15 @@ int auxtrace_record__read_finish(struct auxtrace_record *itr, int idx)
 		if (evsel__is_aux_event(evsel)) {
 			int cpu_map_idx;
 
-			if (evsel->disabled)
-				return 0;
-
 			cpu_map_idx = evlist__find_cpu_map_idx(itr->evlist,
 							       evsel, idx);
 			/* No map is found in per CPU mmap */
 			if (cpu_map_idx == -ENOENT)
 				return cpu_map_idx;
 
+			if (evsel->disabled)
+				return 0;
+
 			if (cpu_map_idx >= 0)
 				return evlist__enable_event_idx(evsel, 1, cpu_map_idx);
 			else
-- 
2.34.1