Messages in this thread Patch in this message | | | From | Arnaldo Carvalho de Melo <> | Subject | [PATCH 07/12] perf probe: Fix to walk all inline instances | Date | Fri, 12 Aug 2011 13:28:59 -0300 |
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From: Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com>
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 <fweisbec@gmail.com> Cc: Ingo Molnar <mingo@elte.hu> Cc: Masami Hiramatsu <masami.hiramatsu@gmail.com> Cc: Paul Mackerras <paulus@samba.org> Cc: Pekka Enberg <penberg@kernel.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: yrl.pp-manager.tt@hitachi.com Link: http://lkml.kernel.org/r/20110811110247.19900.93702.stgit@fedora15 Signed-off-by: Masami Hiramatsu <masami.hiramatsu@gmail.com> Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> --- tools/perf/util/probe-finder.c | 8 +++++++- 1 files changed, 7 insertions(+), 1 deletions(-)
diff --git a/tools/perf/util/probe-finder.c b/tools/perf/util/probe-finder.c index 573c723..d6d5768 100644 --- 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 */ -- 1.6.2.5
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