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From: Masami Hiramatsu <mhiramat@kernel.org>
To: Steven Rostedt <rostedt@goodmis.org>
Cc: Andreas Ziegler <andreas.ziegler@fau.de>,
	Masami Hiramatsu <mhiramat@kernel.org>,
	Ingo Molnar <mingo@redhat.com>,
	linux-kernel@vger.kernel.org
Subject: [PATCH v3 2/3] tracing: probeevent: Do not accumulate on ret variable
Date: Tue,  7 May 2019 22:55:52 +0900
Message-ID: <155723735237.9149.3192150444705457531.stgit@devnote2> (raw)
In-Reply-To: <155723732200.9149.10482668315693777743.stgit@devnote2>

Do not accumulate strlen result on "ret" local variable, because
it is accumulated on "total" local variable for array case.

Fixes: 40b53b771806 ("tracing: probeevent: Add array type support")
Signed-off-by: Masami Hiramatsu <mhiramat@kernel.org>
---
 kernel/trace/trace_probe_tmpl.h |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/kernel/trace/trace_probe_tmpl.h b/kernel/trace/trace_probe_tmpl.h
index 4737bb8c07a3..c30c61f12ddd 100644
--- a/kernel/trace/trace_probe_tmpl.h
+++ b/kernel/trace/trace_probe_tmpl.h
@@ -88,7 +88,7 @@ process_fetch_insn_bottom(struct fetch_insn *code, unsigned long val,
 	/* 3rd stage: store value to buffer */
 	if (unlikely(!dest)) {
 		if (code->op == FETCH_OP_ST_STRING) {
-			ret += fetch_store_strlen(val + code->offset);
+			ret = fetch_store_strlen(val + code->offset);
 			code++;
 			goto array;
 		} else


  parent reply index

Thread overview: 6+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-05-07 13:55 [PATCH v3 0/3] tracing: probeevent: Fix probe argument parser and handler Masami Hiramatsu
2019-05-07 13:55 ` [PATCH v3 1/3] tracing: uprobes: Re-enable $comm support for uprobe events Masami Hiramatsu
2019-05-07 13:55 ` Masami Hiramatsu [this message]
2019-05-07 13:56 ` [PATCH v3 3/3] tracing: probeevent: Fix to make the type of $comm string Masami Hiramatsu
2019-05-08  2:10 ` [PATCH v3 0/3] tracing: probeevent: Fix probe argument parser and handler Steven Rostedt
2019-05-08  4:59   ` Masami Hiramatsu

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