From f66fedcb723a9f118170200e21dbabb305f8c702 Mon Sep 17 00:00:00 2001 From: Masami Hiramatsu Date: Sat, 20 Aug 2011 14:39:23 +0900 Subject: [PATCH] perf probe: Fix regression of variable finder Fix to call convert_variable() if previous call does not fail. To call convert_variable, it ensures "ret" is 0. However, since "ret" has the return value of synthesize_perf_probe_arg() which always returns positive value if it succeeded, perf probe doesn't call convert_variable(). This will cause a SEGV when we add an event with arguments. This has to be fixed as it ensures "ret" is greater than 0 (or not negative). This regression has been introduced by my previous patch, f182e3e1. Cc: Frederic Weisbecker Cc: Ingo Molnar Cc: Paul Mackerras Cc: Pekka Enberg Cc: Peter Zijlstra Cc: yrl.pp-manager.tt@hitachi.com Link: http://lkml.kernel.org/r/20110820053922.3286.65805.stgit@fedora15 Signed-off-by: Masami Hiramatsu Signed-off-by: Arnaldo Carvalho de Melo --- 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 555fc3864b90..5d732621a462 100644 --- a/tools/perf/util/probe-finder.c +++ b/tools/perf/util/probe-finder.c @@ -659,7 +659,7 @@ static int find_variable(Dwarf_Die *sc_die, struct probe_finder *pf) if (!die_find_variable_at(&pf->cu_die, pf->pvar->var, 0, &vr_die)) ret = -ENOENT; } - if (ret == 0) + if (ret >= 0) ret = convert_variable(&vr_die, pf); if (ret < 0) -- 2.20.1