linux-kernel - [PATCH v2 5/7] perf kwork: Strdup function name in workqueue_work

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Date:   Sat, 30 Jul 2022 11:03:33 +0800
From:   Yang Jihong <yangjihong1@...wei.com>
To:     <peterz@...radead.org>, <mingo@...hat.com>, <acme@...nel.org>,
        <mark.rutland@....com>, <alexander.shishkin@...ux.intel.com>,
        <jolsa@...nel.org>, <namhyung@...nel.org>,
        <colin.i.king@...il.com>, <linux-kernel@...r.kernel.org>,
        <linux-perf-users@...r.kernel.org>
CC:     <pc@...ibm.com>, <yhs@...com>, <andrii.nakryiko@...il.com>,
        <songliubraving@...com>, <yangjihong1@...wei.com>
Subject: [PATCH v2 5/7] perf kwork: Strdup function name in workqueue_work_init

perf_session has been deleted when report, maps data in session has been free,
we need to copy duplicate of workqueue function symbol for future use.

Signed-off-by: Yang Jihong <yangjihong1@...wei.com>
---
 tools/perf/builtin-kwork.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/tools/perf/builtin-kwork.c b/tools/perf/builtin-kwork.c
index d6c09044a929..33bcab2aafcd 100644
--- a/tools/perf/builtin-kwork.c
+++ b/tools/perf/builtin-kwork.c
@@ -1021,7 +1021,7 @@ static void workqueue_work_init(struct kwork_class *class,
 	work->cpu = sample->cpu;
 	work->id = evsel__intval(evsel, sample, "work");
 	work->name = function_addr == 0 ? NULL :
-		machine__resolve_kernel_addr(machine, &function_addr, &modp);
+		strdup(machine__resolve_kernel_addr(machine, &function_addr, &modp));
 }
 
 static void workqueue_work_name(struct kwork_work *work, char *buf, int len)
-- 
2.30.GIT