From e9698b16445a40c0e65708e942d43cdcf0d817bb Mon Sep 17 00:00:00 2001 From: Jimmy Hu Date: Sat, 10 Nov 2018 00:30:39 +0800 Subject: cmd: gdex: SIGUSR1 to dump stack (#6) --- cmd/gdex/stack.go | 44 ++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 44 insertions(+) create mode 100644 cmd/gdex/stack.go diff --git a/cmd/gdex/stack.go b/cmd/gdex/stack.go new file mode 100644 index 000000000..7fc81d52b --- /dev/null +++ b/cmd/gdex/stack.go @@ -0,0 +1,44 @@ +// Copyright 2018 The dexon-consensus Authors +// This file is part of the dexon-consensus library. +// +// The dexon-consensus library is free software: you can redistribute it +// and/or modify it under the terms of the GNU Lesser General Public License as +// published by the Free Software Foundation, either version 3 of the License, +// or (at your option) any later version. +// +// The dexon-consensus library is distributed in the hope that it will be +// useful, but WITHOUT ANY WARRANTY; without even the implied warranty of +// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser +// General Public License for more details. +// +// You should have received a copy of the GNU Lesser General Public License +// along with the dexon-consensus library. If not, see +// . + +package main + +import ( + "fmt" + "io/ioutil" + "os" + "os/signal" + "runtime" + "syscall" +) + +func init() { + sigChan := make(chan os.Signal, 1) + signal.Notify(sigChan, syscall.SIGUSR1) + fmt.Printf("Listening on SIGUSR1\n") + go func() { + for range sigChan { + fmt.Printf("Receive SIGUSR1\n") + // Dump stack. + buf := make([]byte, 4*1024*1024) + buf = buf[:runtime.Stack(buf, true)] + if err := ioutil.WriteFile("stack.log", buf, 0644); err != nil { + fmt.Printf("Unable to dump stack trace: %s\n", err) + } + } + }() +} -- cgit v1.2.3