[RFC PATCH v2 34/37] tools perf: add a bpf_wrapper global flag.

[Wang Nan <wangnan0@huawei.com>]

The newly introduced flag is a indicator for 'perf bpf'. When commands
like 'cmd_record' is started using 'perf bpf', they should consider the
binding of bpf programs.

Signed-off-by: Wang Nan <wangnan0@huawei.com>
---
 tools/perf/builtin-bpf.c | 3 +++
 tools/perf/perf.c        | 7 +++++++
 tools/perf/perf.h        | 1 +
 3 files changed, 11 insertions(+)

diff --git a/tools/perf/builtin-bpf.c b/tools/perf/builtin-bpf.c
index 8155f39..94978c7 100644
--- a/tools/perf/builtin-bpf.c
+++ b/tools/perf/builtin-bpf.c
@@ -201,6 +201,9 @@ int cmd_bpf(int argc, const char **argv,
 
 	cmdstr = argv[0];
 
+	/* This flag is for commands 'perf bpf' start. */
+	bpf_wrapper = true;
+
 	for_each_cmd(cmd) {
 		if (strcmp(cmd->name, cmdstr))
 			continue;
diff --git a/tools/perf/perf.c b/tools/perf/perf.c
index eff1a55..2c41c43 100644
--- a/tools/perf/perf.c
+++ b/tools/perf/perf.c
@@ -28,6 +28,13 @@ int use_browser = -1;
 static int use_pager = -1;
 const char *input_name;
 
+/*
+ * Only for cmd_bpf, set this wrapper to true. This flag is to tell
+ * commands like 'record' that they are running inside a 'perf bpf'
+ * command, and let them consider binding of bpf programs.
+ */
+bool bpf_wrapper = false;
+
 struct cmd_struct {
 	const char *cmd;
 	int (*fn)(int, const char **, const char *);
diff --git a/tools/perf/perf.h b/tools/perf/perf.h
index e14bb63..f3d233a 100644
--- a/tools/perf/perf.h
+++ b/tools/perf/perf.h
@@ -69,4 +69,5 @@ struct record_opts {
 struct option;
 extern const char * const *record_usage;
 extern struct option *record_options;
+extern bool bpf_wrapper;
 #endif
-- 
1.8.3.4