linux-kernel - [PATCH 1/9] perf srcline: Do not return NULL for srcline

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Date:   Thu, 15 Dec 2022 11:28:09 -0800
From:   Namhyung Kim <namhyung@...nel.org>
To:     Arnaldo Carvalho de Melo <acme@...nel.org>,
        Jiri Olsa <jolsa@...nel.org>
Cc:     Ingo Molnar <mingo@...nel.org>,
        Peter Zijlstra <peterz@...radead.org>,
        LKML <linux-kernel@...r.kernel.org>,
        Ian Rogers <irogers@...gle.com>,
        Adrian Hunter <adrian.hunter@...el.com>,
        linux-perf-users@...r.kernel.org, Andi Kleen <ak@...ux.intel.com>,
        Milian Wolff <milian.wolff@...b.com>,
        Leo Yan <leo.yan@...aro.org>
Subject: [PATCH 1/9] perf srcline: Do not return NULL for srcline

The code assumes non-NULL srcline value always, let's return the usual
SRCLINE_UNKNOWN ("??:0") string instead.

Signed-off-by: Namhyung Kim <namhyung@...nel.org>
---
 tools/perf/util/srcline.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/tools/perf/util/srcline.c b/tools/perf/util/srcline.c
index af468e3bb6fa..5319efb16a5a 100644
--- a/tools/perf/util/srcline.c
+++ b/tools/perf/util/srcline.c
@@ -716,7 +716,7 @@ char *__get_srcline(struct dso *dso, u64 addr, struct symbol *sym,
 
 	if (!show_addr)
 		return (show_sym && sym) ?
-			    strndup(sym->name, sym->namelen) : NULL;
+			    strndup(sym->name, sym->namelen) : SRCLINE_UNKNOWN;
 
 	if (sym) {
 		if (asprintf(&srcline, "%s+%" PRIu64, show_sym ? sym->name : "",
-- 
2.39.0.314.g84b9a713c41-goog