From 0ce094b9a30fa6f1b48db56bee18c7e260722869 Mon Sep 17 00:00:00 2001
From: Fabricio Voznika <fvoznika@google.com>
Date: Fri, 21 Apr 2023 15:53:44 -0700
Subject: [PATCH] Report number of trace sessions created metric

PiperOrigin-RevId: 526157216
---
 pkg/sentry/seccheck/BUILD     | 1 +
 pkg/sentry/seccheck/config.go | 4 ++++
 2 files changed, 5 insertions(+)

diff --git a/pkg/sentry/seccheck/BUILD b/pkg/sentry/seccheck/BUILD
index 8c66bf19c..c772c4b0c 100644
--- a/pkg/sentry/seccheck/BUILD
+++ b/pkg/sentry/seccheck/BUILD
@@ -35,6 +35,7 @@ go_library(
         "//pkg/fd",
         "//pkg/gohacks",
         "//pkg/log",
+        "//pkg/metric",
         "//pkg/sentry/arch",
         "//pkg/sentry/kernel/time",
         "//pkg/sentry/seccheck/points:points_go_proto",
diff --git a/pkg/sentry/seccheck/config.go b/pkg/sentry/seccheck/config.go
index 4e688f4e1..56c071edf 100644
--- a/pkg/sentry/seccheck/config.go
+++ b/pkg/sentry/seccheck/config.go
@@ -21,6 +21,7 @@ import (
 
 	"gvisor.dev/gvisor/pkg/fd"
 	"gvisor.dev/gvisor/pkg/log"
+	"gvisor.dev/gvisor/pkg/metric"
 )
 
 // DefaultSessionName is the name of the only session that can exist in the
@@ -32,6 +33,8 @@ var (
 	sessions   = make(map[string]*State)
 )
 
+var sessionCounter = metric.MustCreateNewUint64Metric("/trace/sessions_created", false /* sync */, "Counts the number of trace sessions created.")
+
 // SessionConfig describes a new session configuration. A session consists of a
 // set of points to be enabled and sinks where the points are sent to.
 type SessionConfig struct {
@@ -136,6 +139,7 @@ func Create(conf *SessionConfig, force bool) error {
 	}
 
 	sessions[conf.Name] = state
+	sessionCounter.Increment()
 	return nil
 }