perf inject: Remove static variables

We want to reduce the impact that each of the builtins has on perf as a
whole, so use the superclassing of perf_tool mechanizm to move its
config knobs to the stack, so that only if we use that tool, its impact
will be felt.

In this case is more about consistency, as the impact of this tool is
minimal.

Cc: David Ahern <[email protected]>
Cc: Frederic Weisbecker <[email protected]>
Cc: Jiri Olsa <[email protected]>
Cc: Mike Galbraith <[email protected]>
Cc: Namhyung Kim <[email protected]>
Cc: Paul Mackerras <[email protected]>
Cc: Peter Zijlstra <[email protected]>
Cc: Stephane Eranian <[email protected]>
Link: http://lkml.kernel.org/n/[email protected]
Signed-off-by: Arnaldo Carvalho de Melo <[email protected]>

Author: acmel

tools/perf/builtin-inject.c

@@ -14,7 +14,10 @@
 
 #include "util/parse-options.h"
 
-static bool		inject_build_ids;
+struct perf_inject {
+	struct perf_tool tool;
+	bool		 build_ids;
+};
 
 static int perf_event__repipe_synth(struct perf_tool *tool __maybe_unused,
 				    union perf_event *event,
@@ -207,48 +210,32 @@ static int perf_event__inject_buildid(struct perf_tool *tool,
 	return 0;
 }
 
-struct perf_tool perf_inject = {
-	.sample		= perf_event__repipe_sample,
-	.mmap		= perf_event__repipe,
-	.comm		= perf_event__repipe,
-	.fork		= perf_event__repipe,
-	.exit		= perf_event__repipe,
-	.lost		= perf_event__repipe,
-	.read		= perf_event__repipe_sample,
-	.throttle	= perf_event__repipe,
-	.unthrottle	= perf_event__repipe,
-	.attr		= perf_event__repipe_attr,
-	.event_type	= perf_event__repipe_event_type_synth,
-	.tracing_data	= perf_event__repipe_tracing_data_synth,
-	.build_id	= perf_event__repipe_op2_synth,
-};
-
 extern volatile int session_done;
 
 static void sig_handler(int sig __maybe_unused)
 {
 	session_done = 1;
 }
 
-static int __cmd_inject(void)
+static int __cmd_inject(struct perf_inject *inject)
 {
 	struct perf_session *session;
 	int ret = -EINVAL;
 
 	signal(SIGINT, sig_handler);
 
-	if (inject_build_ids) {
-		perf_inject.sample	 = perf_event__inject_buildid;
-		perf_inject.mmap	 = perf_event__repipe_mmap;
-		perf_inject.fork	 = perf_event__repipe_task;
-		perf_inject.tracing_data = perf_event__repipe_tracing_data;
+	if (inject->build_ids) {
+		inject->tool.sample	  = perf_event__inject_buildid;
+		inject->tool.mmap	  = perf_event__repipe_mmap;
+		inject->tool.fork	  = perf_event__repipe_task;
+		inject->tool.tracing_data = perf_event__repipe_tracing_data;
 	}
 
-	session = perf_session__new("-", O_RDONLY, false, true, &perf_inject);
+	session = perf_session__new("-", O_RDONLY, false, true, &inject->tool);
 	if (session == NULL)
 		return -ENOMEM;
 
-	ret = perf_session__process_events(session, &perf_inject);
+	ret = perf_session__process_events(session, &inject->tool);
 
 	perf_session__delete(session);
 
@@ -260,16 +247,33 @@ static const char * const report_usage[] = {
 	NULL
 };
 
-static const struct option options[] = {
-	OPT_BOOLEAN('b', "build-ids", &inject_build_ids,
-		    "Inject build-ids into the output stream"),
-	OPT_INCR('v', "verbose", &verbose,
-		 "be more verbose (show build ids, etc)"),
-	OPT_END()
-};
-
 int cmd_inject(int argc, const char **argv, const char *prefix __maybe_unused)
 {
+	struct perf_inject inject = {
+		.tool = {
+			.sample		= perf_event__repipe_sample,
+			.mmap		= perf_event__repipe,
+			.comm		= perf_event__repipe,
+			.fork		= perf_event__repipe,
+			.exit		= perf_event__repipe,
+			.lost		= perf_event__repipe,
+			.read		= perf_event__repipe_sample,
+			.throttle	= perf_event__repipe,
+			.unthrottle	= perf_event__repipe,
+			.attr		= perf_event__repipe_attr,
+			.event_type	= perf_event__repipe_event_type_synth,
+			.tracing_data	= perf_event__repipe_tracing_data_synth,
+			.build_id	= perf_event__repipe_op2_synth,
+		},
+	};
+	const struct option options[] = {
+		OPT_BOOLEAN('b', "build-ids", &inject.build_ids,
+			    "Inject build-ids into the output stream"),
+		OPT_INCR('v', "verbose", &verbose,
+			 "be more verbose (show build ids, etc)"),
+		OPT_END()
+	};
+
 	argc = parse_options(argc, argv, options, report_usage, 0);
 
 	/*
@@ -281,5 +285,5 @@ int cmd_inject(int argc, const char **argv, const char *prefix __maybe_unused)
 	if (symbol__init() < 0)
 		return -1;
 
-	return __cmd_inject();
+	return __cmd_inject(&inject);
 }