perf probe: Fix to walk all inline instances

Fix line-range collector to walk all instances of inlined function,
because some execution paths can be optimized out depending on the
function argument of instances.

E.g.)
inline_func (arg) {
	if (arg)
		do_something;
	else
		do_another;
}

func_A() {
	inline_func(1)
}

func_B() {
	inline_func(0)
}

In this case, func_A may have only do_something code and func_B may have
only do_another.

Cc: Frederic Weisbecker <[email protected]>
Cc: Ingo Molnar <[email protected]>
Cc: Masami Hiramatsu <[email protected]>
Cc: Paul Mackerras <[email protected]>
Cc: Pekka Enberg <[email protected]>
Cc: Peter Zijlstra <[email protected]>
Cc: [email protected]
Link: http://lkml.kernel.org/r/20110811110247.19900.93702.stgit@fedora15
Signed-off-by: Masami Hiramatsu <[email protected]>
Signed-off-by: Arnaldo Carvalho de Melo <[email protected]>

diff --git a/tools/perf/util/probe-finder.c b/tools/perf/util/probe-finder.c
index 573c7236322327ec780bb0c099f97cd3171aabd3..d6d57682473a6d17d0301058b8e54904547f447f 100644 (file)
--- a/tools/perf/util/probe-finder.c
+++ b/tools/perf/util/probe-finder.c
@@ -1393,7 +1393,13 @@ static int line_range_inline_cb(Dwarf_Die *in_die, void *data)
        struct dwarf_callback_param *param = data;
 
        param->retval = find_line_range_by_line(in_die, param->data);
-       return DWARF_CB_ABORT;  /* No need to find other instances */
+
+       /*
+        * We have to check all instances of inlined function, because
+        * some execution paths can be optimized out depends on the
+        * function argument of instances
+        */
+       return DWARF_CB_OK;
 }
 
 /* Search function from function name */