snapshot of https://github.com/grpc/grpc-go.git (master, 2026-09-15; blobs > 131072B omitted)

profiling/cmd/flags.go

@@ -0,0 +1,76 @@
+/*
+ *
+ * Copyright 2019 gRPC authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ */
+
+package main
+
+import (
+	"flag"
+	"fmt"
+)
+
+var flagAddress = flag.String("address", "", "address of a remote gRPC server with profiling turned on to retrieve stats from")
+var flagTimeout = flag.Int("timeout", 0, "network operations timeout in seconds to remote target (0 indicates unlimited)")
+
+var flagRetrieveSnapshot = flag.Bool("retrieve-snapshot", false, "connect to remote target and retrieve a profiling snapshot locally for processing")
+var flagSnapshot = flag.String("snapshot", "", "snapshot file to write to when retrieving profiling data or snapshot file to read from when processing profiling data")
+
+var flagEnableProfiling = flag.Bool("enable-profiling", false, "enable profiling in remote target")
+var flagDisableProfiling = flag.Bool("disable-profiling", false, "disable profiling in remote target")
+
+var flagStreamStatsCatapultJSON = flag.String("stream-stats-catapult-json", "", "path to a file to write to after transforming a snapshot into catapult's JSON format")
+var flagStreamStatsFilter = flag.String("stream-stats-filter", "server,client", "comma-separated list of stat tags to filter for")
+
+func exactlyOneOf(opts ...bool) bool {
+	first := true
+	for _, o := range opts {
+		if !o {
+			continue
+		}
+
+		if !first {
+			return false
+		}
+		first = false
+	}
+
+	return !first
+}
+
+func parseArgs() error {
+	flag.Parse()
+
+	if *flagAddress != "" {
+		if !exactlyOneOf(*flagEnableProfiling, *flagDisableProfiling, *flagRetrieveSnapshot) {
+			return fmt.Errorf("when -address is specified, you must include exactly only one of -enable-profiling, -disable-profiling, and -retrieve-snapshot")
+		}
+
+		if *flagStreamStatsCatapultJSON != "" {
+			return fmt.Errorf("when -address is specified, you must not include -stream-stats-catapult-json")
+		}
+	} else {
+		if *flagEnableProfiling || *flagDisableProfiling || *flagRetrieveSnapshot {
+			return fmt.Errorf("when -address isn't specified, you must not include any of -enable-profiling, -disable-profiling, and -retrieve-snapshot")
+		}
+
+		if *flagStreamStatsCatapultJSON == "" {
+			return fmt.Errorf("when -address isn't specified, you must include -stream-stats-catapult-json")
+		}
+	}
+
+	return nil
+}