linux-kernel - [tip:perf/urgent] perf probe: Use dwarf_getcfi_elf() instead of dwarf

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Date:	Mon, 14 Apr 2014 07:53:28 -0700
From:	tip-bot for Namhyung Kim <tipbot@...or.com>
To:	linux-tip-commits@...r.kernel.org
Cc:	linux-kernel@...r.kernel.org, hpa@...or.com, mingo@...nel.org,
	masami.hiramatsu.pt@...achi.com, tglx@...utronix.de,
	namhyung@...nel.org, jolsa@...hat.com
Subject: [tip:perf/urgent] perf probe: Use dwarf_getcfi_elf()
  instead of dwarf_getcfi()

Commit-ID:  03d89412981a7681971bc77edba1669595763030
Gitweb:     http://git.kernel.org/tip/03d89412981a7681971bc77edba1669595763030
Author:     Namhyung Kim <namhyung@...nel.org>
AuthorDate: Mon, 7 Apr 2014 16:05:48 +0900
Committer:  Jiri Olsa <jolsa@...hat.com>
CommitDate: Mon, 14 Apr 2014 12:55:40 +0200

perf probe: Use dwarf_getcfi_elf() instead of dwarf_getcfi()

The dwarf_getcfi() only checks .debug_frame section for CFI, but as
most binaries only have .eh_frame it'd return NULL and it makes
some variables inaccessible.

Using dwarf_getcfi_elf (along with dwarf_getelf()) allows to show and
add probe to more variables.

Signed-off-by: Namhyung Kim <namhyung@...nel.org>
Acked-by: Masami Hiramatsu <masami.hiramatsu.pt@...achi.com>
Cc: Masami Hiramatsu <masami.hiramatsu.pt@...achi.com>
Link: http://lkml.kernel.org/r/1396854348-9296-1-git-send-email-namhyung@kernel.org
Signed-off-by: Jiri Olsa <jolsa@...hat.com>
---
 tools/perf/util/probe-finder.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/tools/perf/util/probe-finder.c b/tools/perf/util/probe-finder.c
index fae274e..5627621 100644
--- a/tools/perf/util/probe-finder.c
+++ b/tools/perf/util/probe-finder.c
@@ -985,7 +985,7 @@ static int debuginfo__find_probes(struct debuginfo *dbg,
 
 #if _ELFUTILS_PREREQ(0, 142)
 	/* Get the call frame information from this dwarf */
-	pf->cfi = dwarf_getcfi(dbg->dbg);
+	pf->cfi = dwarf_getcfi_elf(dwarf_getelf(dbg->dbg));
 #endif
 
 	off = 0;
--
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