1 files changed, 41 insertions, 0 deletions
diff --git a/src/runtime/pprof/rusage_test.go b/src/runtime/pprof/rusage_test.go
new file mode 100644
index 0000000..8039510
--- /dev/null
+++ b/src/runtime/pprof/rusage_test.go
@@ -0,0 +1,41 @@
+// Copyright 2019 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+//go:build unix
+
+package pprof
+
+import (
+	"syscall"
+	"time"
+)
+
+func init() {
+	diffCPUTimeImpl = diffCPUTimeRUsage
+}
+
+func diffCPUTimeRUsage(f func()) (user, system time.Duration) {
+	ok := true
+	var before, after syscall.Rusage
+
+	err := syscall.Getrusage(syscall.RUSAGE_SELF, &before)
+	if err != nil {
+		ok = false
+	}
+
+	f()
+
+	err = syscall.Getrusage(syscall.RUSAGE_SELF, &after)
+	if err != nil {
+		ok = false
+	}
+
+	if !ok {
+		return 0, 0
+	}
+
+	user = time.Duration(after.Utime.Nano() - before.Utime.Nano())
+	system = time.Duration(after.Stime.Nano() - before.Stime.Nano())
+	return user, system
+}