linux-kernel - [PATCH -tip 3/9] perf probe: Fix bugs in line range finder

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Date:	Thu, 18 Feb 2010 18:27:25 -0500
From:	Masami Hiramatsu <mhiramat@...hat.com>
To:	Ingo Molnar <mingo@...e.hu>, lkml <linux-kernel@...r.kernel.org>
Cc:	Paul Mackerras <paulus@...ba.org>,
	Arnaldo Carvalho de Melo <acme@...hat.com>,
	Steven Rostedt <rostedt@...dmis.org>,
	Jim Keniston <jkenisto@...ibm.com>,
	Ananth N Mavinakayanahalli <ananth@...ibm.com>,
	Christoph Hellwig <hch@...radead.org>,
	"Frank Ch. Eigler" <fche@...hat.com>,
	Jason Baron <jbaron@...hat.com>,
	"K.Prasad" <prasad@...ux.vnet.ibm.com>,
	Peter Zijlstra <peterz@...radead.org>,
	Srikar Dronamraju <srikar@...ux.vnet.ibm.com>,
	Ulrich Drepper <drepper@...hat.com>,
	Roland McGrath <roland@...hat.com>,
	Mike Galbraith <efault@....de>,
	systemtap <systemtap@...rces.redhat.com>,
	DLE <dle-develop@...ts.sourceforge.net>
Subject: [PATCH -tip 3/9] perf probe: Fix bugs in line range finder

Fix find_line_range_by_line() to init line_list and remove
misconseptional found marking which should be done when
real lines are found (if there is no lines probe-able,
find_line_range() should return 0).

Signed-off-by: Masami Hiramatsu <mhiramat@...hat.com>
Cc: Ingo Molnar <mingo@...e.hu>
Cc: Frederic Weisbecker <fweisbec@...il.com>
Cc: Arnaldo Carvalho de Melo <acme@...hat.com>
Cc: Peter Zijlstra <peterz@...radead.org>
Cc: Paul Mackerras <paulus@...ba.org>
Cc: Mike Galbraith <efault@....de>
Cc: K.Prasad <prasad@...ux.vnet.ibm.com>
---

 tools/perf/util/probe-finder.c |    3 +--
 1 files changed, 1 insertions(+), 2 deletions(-)

diff --git a/tools/perf/util/probe-finder.c b/tools/perf/util/probe-finder.c
index 1b2124d..3e10dbe 100644
--- a/tools/perf/util/probe-finder.c
+++ b/tools/perf/util/probe-finder.c
@@ -788,6 +788,7 @@ static void find_line_range_by_line(struct line_finder *lf)
 	Dwarf_Addr addr;
 	int ret;
 
+	INIT_LIST_HEAD(&lf->lr->line_list);
 	ret = dwarf_srclines(lf->cu_die, &lines, &cnt, &__dw_error);
 	DIE_IF(ret != DW_DLV_OK);
 
@@ -848,8 +849,6 @@ static int linefunc_callback(struct die_link *dlink, void *data)
 		lr->start = lf->lno_s;
 		lr->end = lf->lno_e;
 		find_line_range_by_line(lf);
-		/* If we find a target function, this should be end. */
-		lf->found = 1;
 		return 1;
 	}
 	return 0;


-- 
Masami Hiramatsu

Software Engineer
Hitachi Computer Products (America), Inc.
Software Solutions Division

e-mail: mhiramat@...hat.com
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