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From: tip-bot for Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com>
To: linux-tip-commits@vger.kernel.org
Cc: acme@redhat.com, linux-kernel@vger.kernel.org, paulus@samba.org,
	hpa@zytor.com, mingo@redhat.com, peterz@infradead.org,
	penberg@kernel.org, masami.hiramatsu@gmail.com,
	masami.hiramatsu.pt@hitachi.com, fweisbec@gmail.com,
	tglx@linutronix.de, mingo@elte.hu
Subject: [tip:perf/core] perf probe: Fix to walk all inline instances
Date: Sun, 14 Aug 2011 15:42:55 GMT	[thread overview]
Message-ID: <tip-36c0c588b9ea979b619d6ddced410f9551e4c5fa@git.kernel.org> (raw)
In-Reply-To: <20110811110247.19900.93702.stgit@fedora15>

Commit-ID:  36c0c588b9ea979b619d6ddced410f9551e4c5fa
Gitweb:     http://git.kernel.org/tip/36c0c588b9ea979b619d6ddced410f9551e4c5fa
Author:     Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com>
AuthorDate: Thu, 11 Aug 2011 20:02:47 +0900
Committer:  Arnaldo Carvalho de Melo <acme@redhat.com>
CommitDate: Fri, 12 Aug 2011 09:25:38 -0300

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 <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 */

  reply	other threads:[~2011-08-14 15:43 UTC|newest]

Thread overview: 19+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2011-08-11 11:02 [PATCH -tip v2 0/9]perf probe bugfixes Masami Hiramatsu
2011-08-11 11:02 ` [PATCH -tip v2 1/9] [BUGFIX] perf-probe: Fix a memory leak for scopes array Masami Hiramatsu
2011-08-14 15:39   ` [tip:perf/core] perf probe: " tip-bot for Masami Hiramatsu
2011-08-11 11:02 ` [PATCH -tip v2 2/9] [BUGFIX] perf probe: Fix line walker to check CU correctly Masami Hiramatsu
2011-08-14 15:40   ` [tip:perf/core] " tip-bot for Masami Hiramatsu
2011-08-11 11:02 ` [PATCH -tip v2 3/9] [BUGFIX] perf probe: Fix to search nested inlined functions in CU Masami Hiramatsu
2011-08-14 15:41   ` [tip:perf/core] " tip-bot for Masami Hiramatsu
2011-08-11 11:02 ` [PATCH -tip v2 4/9] [BUGFIX] perf probe: Fix to walk all inline instances Masami Hiramatsu
2011-08-14 15:42   ` tip-bot for Masami Hiramatsu [this message]
2011-08-11 11:02 ` [PATCH -tip v2 5/9] [BUGFIX] perf probe: Warn when more than one line are given Masami Hiramatsu
2011-08-14 15:44   ` [tip:perf/core] " tip-bot for Masami Hiramatsu
2011-08-11 11:02 ` [PATCH -tip v2 6/9] [BUGFIX] perf probe: Fix to search local variables in appropriate scope Masami Hiramatsu
2011-08-14 15:45   ` [tip:perf/core] " tip-bot for Masami Hiramatsu
2011-08-11 11:03 ` [PATCH -tip v2 7/9] [BUGFIX] perf probe: Avoid searching variables in intermediate scopes Masami Hiramatsu
2011-08-14 15:47   ` [tip:perf/core] " tip-bot for Masami Hiramatsu
2011-08-11 11:03 ` [PATCH -tip v2 8/9] [BUGFIX] perf probe: Search concrete out-of-line instances Masami Hiramatsu
2011-08-14 15:48   ` [tip:perf/core] " tip-bot for Masami Hiramatsu
2011-08-11 11:03 ` [PATCH -tip v2 9/9] [BUGFIX] perf probe: Filter out redundant inline-instances Masami Hiramatsu
2011-08-14 15:50   ` [tip:perf/core] " tip-bot for Masami Hiramatsu

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