syncs: start working on mutex debugging, registrationbradfitz/mutex_debug

Updates #17852

Change-Id: Ib1b634eedd30cc4006bc1b39aa8d479d37c5f1f2
Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>

2 files changed, 5 insertions, 0 deletions

diff --git a/wgengine/netlog/netlog.go b/wgengine/netlog/netlog.go
index 12fe9c797..ba643944f 100644
--- a/wgengine/netlog/netlog.go
+++ b/wgengine/netlog/netlog.go
@@ -80,6 +80,10 @@ type Logger struct {
 	routePrefixes []netip.Prefix
 }
 
+func (nl *Logger) RegisterMutex() {
+	syncs.RegisterMutex(&nl.mu, "netlog.Logger.mu")
+}
+
 // Running reports whether the logger is running.
 func (nl *Logger) Running() bool {
 	nl.mu.Lock()
diff --git a/wgengine/netlog/netlog_omit.go b/wgengine/netlog/netlog_omit.go
index 03610a1ef..3cefe978a 100644
--- a/wgengine/netlog/netlog_omit.go
+++ b/wgengine/netlog/netlog_omit.go
@@ -12,3 +12,4 @@ func (*Logger) Running() bool          { return false }
 func (*Logger) Shutdown(any) error     { return nil }
 func (*Logger) ReconfigNetworkMap(any) {}
 func (*Logger) ReconfigRoutes(any)     {}
+func (*Logger) RegisterMutex()         {}