syncthing/lib/sync/debug.go
Jakob Borg 838c182b5b cmd/syncthing, lib/sync: Don't do deadlock detection when STDEADLOCKTIMEOUT=0 (fixes #4644)
Allows setting STDEADLOCKTIMEOUT=0 (or any integer <= 0) to disable the
deadlock detection entirely.

GitHub-Pull-Request: https://github.com/syncthing/syncthing/pull/4673
2018-01-15 13:33:52 +00:00

44 lines
1.3 KiB
Go

// Copyright (C) 2015 The Syncthing Authors.
//
// This Source Code Form is subject to the terms of the Mozilla Public
// License, v. 2.0. If a copy of the MPL was not distributed with this file,
// You can obtain one at https://mozilla.org/MPL/2.0/.
package sync
import (
"os"
"strconv"
"strings"
"time"
"github.com/sasha-s/go-deadlock"
"github.com/syncthing/syncthing/lib/logger"
)
var (
threshold = 100 * time.Millisecond
l = logger.DefaultLogger.NewFacility("sync", "Mutexes")
// We make an exception in this package and have an actual "if debug { ...
// }" variable, as it may be rather performance critical and does
// nonstandard things (from a debug logging PoV).
debug = strings.Contains(os.Getenv("STTRACE"), "sync") || os.Getenv("STTRACE") == "all"
useDeadlock = false
)
func init() {
l.SetDebug("sync", strings.Contains(os.Getenv("STTRACE"), "sync") || os.Getenv("STTRACE") == "all")
if n, _ := strconv.Atoi(os.Getenv("STLOCKTHRESHOLD")); n > 0 {
threshold = time.Duration(n) * time.Millisecond
}
l.Debugf("Enabling lock logging at %v threshold", threshold)
if n, _ := strconv.Atoi(os.Getenv("STDEADLOCKTIMEOUT")); n > 0 {
deadlock.Opts.DeadlockTimeout = time.Duration(n) * time.Second
l.Debugf("Enabling lock deadlocking at %v", deadlock.Opts.DeadlockTimeout)
useDeadlock = true
}
}