linux-kernel - [PATCH 12/15] parse-events: Support '+' opcode in print format

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Date:	Wed, 25 Apr 2012 14:26:56 +0200
From:	Frederic Weisbecker <fweisbec@...il.com>
To:	Ingo Molnar <mingo@...nel.org>
Cc:	LKML <linux-kernel@...r.kernel.org>,
	Vaibhav Nagarnaik <vnagarnaik@...gle.com>,
	Michael Rubin <mrubin@...gle.com>,
	David Sharp <dhsharp@...gle.com>,
	Steven Rostedt <rostedt@...dmis.org>,
	Thomas Gleixner <tglx@...utronix.de>,
	Peter Zijlstra <peterz@...radead.org>,
	Arnaldo Carvalho de Melo <acme@...radead.org>,
	Borislav Petkov <bp@...en8.de>, Jiri Olsa <jolsa@...hat.com>,
	Arun Sharma <asharma@...com>,
	Namhyung Kim <namhyung.kim@....com>,
	David Ahern <dsahern@...il.com>,
	Frederic Weisbecker <fweisbec@...il.com>
Subject: [PATCH 12/15] parse-events: Support '+' opcode in print format

From: Vaibhav Nagarnaik <vnagarnaik@...gle.com>

The '+' opcode is not supported in the arguments for the print format.
This patch adds support for it.

Cc: Michael Rubin <mrubin@...gle.com>
Cc: David Sharp <dhsharp@...gle.com>
Signed-off-by: Vaibhav Nagarnaik <vnagarnaik@...gle.com>
Link: http://lkml.kernel.org/r/1310785241-3799-4-git-send-email-vnagarnaik@google.com
Signed-off-by: Steven Rostedt <rostedt@...dmis.org>
Cc: Ingo Molnar <mingo@...nel.org>
Cc: Thomas Gleixner <tglx@...utronix.de>
Cc: Peter Zijlstra <peterz@...radead.org>
Cc: Arnaldo Carvalho de Melo <acme@...radead.org>
Cc: Steven Rostedt <rostedt@...dmis.org>
Cc: Borislav Petkov <bp@...en8.de>
Cc: Jiri Olsa <jolsa@...hat.com>
Cc: Arun Sharma <asharma@...com>
Cc: Namhyung Kim <namhyung.kim@....com>
Cc: David Ahern <dsahern@...il.com>
Signed-off-by: Frederic Weisbecker <fweisbec@...il.com>
---
 tools/lib/traceevent/event-parse.c |   12 ++++++++++++
 1 files changed, 12 insertions(+), 0 deletions(-)

diff --git a/tools/lib/traceevent/event-parse.c b/tools/lib/traceevent/event-parse.c
index 4d5092f..476626a 100644
--- a/tools/lib/traceevent/event-parse.c
+++ b/tools/lib/traceevent/event-parse.c
@@ -2047,6 +2047,18 @@ static int arg_num_eval(struct print_arg *arg, long long *val)
 				break;
 			*val = left - right;
 			break;
+		case '+':
+			if (arg->op.left->type == PRINT_NULL)
+				left = 0;
+			else
+				ret = arg_num_eval(arg->op.left, &left);
+			if (!ret)
+				break;
+			ret = arg_num_eval(arg->op.right, &right);
+			if (!ret)
+				break;
+			*val = left + right;
+			break;
 		default:
 			do_warning("unknown op '%s'", arg->op.op);
 			ret = 0;
-- 
1.7.5.4

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