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From: Masami Hiramatsu <mhiramat@kernel.org>
To: Arnaldo Carvalho de Melo <acme@kernel.org>
Cc: Jiri Olsa <jolsa@redhat.com>, Namhyung Kim <namhyung@kernel.org>,
	Masami Hiramatsu <mhiramat@kernel.org>,
	linux-kernel@vger.kernel.org
Subject: [BUGFIX PATCH 6/6] perf/probe: Fix to show ranges of variables in functions without entry_pc
Date: Fri, 25 Oct 2019 17:47:10 +0900
Message-ID: <157199323018.8075.8179744380479673672.stgit@devnote2> (raw)
In-Reply-To: <157199317547.8075.1010940983970397945.stgit@devnote2>

Fix to show ranges of variables (--range and --vars option) in
functions which DIE has only ranges but no entry_pc attribute.

Without this fix,
  # tools/perf/perf probe --range -V clear_tasks_mm_cpumask
  Available variables at clear_tasks_mm_cpumask
  	@<clear_tasks_mm_cpumask+0>
  		(No matched variables)

With this fix,
  # tools/perf/perf probe --range -V clear_tasks_mm_cpumask
  Available variables at clear_tasks_mm_cpumask
	@<clear_tasks_mm_cpumask+0>
		[VAL]	int	cpu	@<clear_tasks_mm_cpumask+[0-35,317-317,2052-2059]>

Fixes: 349e8d261131 ("perf probe: Add --range option to show a variable's location range")
Signed-off-by: Masami Hiramatsu <mhiramat@kernel.org>
---
 tools/perf/util/dwarf-aux.c |    4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/tools/perf/util/dwarf-aux.c b/tools/perf/util/dwarf-aux.c
index e0c507d6b3b4..ac82fd937e4b 100644
--- a/tools/perf/util/dwarf-aux.c
+++ b/tools/perf/util/dwarf-aux.c
@@ -1019,7 +1019,7 @@ static int die_get_var_innermost_scope(Dwarf_Die *sp_die, Dwarf_Die *vr_die,
 	bool first = true;
 	const char *name;
 
-	ret = dwarf_entrypc(sp_die, &entry);
+	ret = die_entrypc(sp_die, &entry);
 	if (ret)
 		return ret;
 
@@ -1082,7 +1082,7 @@ int die_get_var_range(Dwarf_Die *sp_die, Dwarf_Die *vr_die, struct strbuf *buf)
 	bool first = true;
 	const char *name;
 
-	ret = dwarf_entrypc(sp_die, &entry);
+	ret = die_entrypc(sp_die, &entry);
 	if (ret)
 		return ret;
 


  parent reply index

Thread overview: 19+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-10-25  8:46 [BUGFIX PATCH 0/6] perf/probe: Additional fixes for range only functions Masami Hiramatsu
2019-10-25  8:46 ` [BUGFIX PATCH 1/6] perf/probe: Fix wrong address verification Masami Hiramatsu
2019-10-25 12:14   ` Arnaldo Carvalho de Melo
2019-10-25 12:36     ` Masami Hiramatsu
2019-10-25 14:28       ` Arnaldo Carvalho de Melo
2019-11-12 11:18   ` [tip: perf/core] perf probe: " tip-bot2 for Masami Hiramatsu
2019-10-25  8:46 ` [BUGFIX PATCH 2/6] perf/probe: Fix to probe a function which has no entry pc Masami Hiramatsu
2019-11-12 11:18   ` [tip: perf/core] perf probe: " tip-bot2 for Masami Hiramatsu
2019-10-25  8:46 ` [BUGFIX PATCH 3/6] perf/probe: Fix to probe an inline " Masami Hiramatsu
2019-10-25 14:35   ` Arnaldo Carvalho de Melo
2019-10-25 14:39     ` Arnaldo Carvalho de Melo
2019-10-26  8:04       ` Masami Hiramatsu
2019-11-12 11:18   ` [tip: perf/core] perf probe: " tip-bot2 for Masami Hiramatsu
2019-10-25  8:46 ` [BUGFIX PATCH 4/6] perf/probe: Fix to list probe event with correct line number Masami Hiramatsu
2019-11-12 11:18   ` [tip: perf/core] perf probe: " tip-bot2 for Masami Hiramatsu
2019-10-25  8:47 ` [BUGFIX PATCH 5/6] perf/probe: Fix to show inlined function callsite without entry_pc Masami Hiramatsu
2019-11-12 11:18   ` [tip: perf/core] perf probe: " tip-bot2 for Masami Hiramatsu
2019-10-25  8:47 ` Masami Hiramatsu [this message]
2019-11-12 11:18   ` [tip: perf/core] perf probe: Fix to show ranges of variables in functions " tip-bot2 for Masami Hiramatsu

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