cafdd5931e
Setting runtime.MemProfileRate to 0 through the flag default value makes it impossible to get an 'in-use' profile.
119 lines
3.5 KiB
Go
119 lines
3.5 KiB
Go
// Copyright 2016 The go-ethereum Authors
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// This file is part of the go-ethereum library.
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//
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// The go-ethereum library is free software: you can redistribute it and/or modify
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// it under the terms of the GNU Lesser General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// The go-ethereum library is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU Lesser General Public License for more details.
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//
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// You should have received a copy of the GNU Lesser General Public License
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// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
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package debug
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import (
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"fmt"
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"net/http"
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_ "net/http/pprof"
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"runtime"
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"github.com/codegangsta/cli"
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"github.com/ethereum/go-ethereum/logger"
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"github.com/ethereum/go-ethereum/logger/glog"
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)
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var (
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verbosityFlag = cli.GenericFlag{
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Name: "verbosity",
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Usage: "Logging verbosity: 0=silent, 1=error, 2=warn, 3=info, 4=core, 5=debug, 6=detail",
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Value: glog.GetVerbosity(),
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}
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vmoduleFlag = cli.GenericFlag{
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Name: "vmodule",
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Usage: "Per-module verbosity: comma-separated list of <pattern>=<level> (e.g. eth/*=6,p2p=5)",
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Value: glog.GetVModule(),
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}
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backtraceAtFlag = cli.GenericFlag{
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Name: "backtrace",
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Usage: "Request a stack trace at a specific logging statement (e.g. \"block.go:271\")",
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Value: glog.GetTraceLocation(),
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}
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pprofFlag = cli.BoolFlag{
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Name: "pprof",
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Usage: "Enable the pprof HTTP server",
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}
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pprofPortFlag = cli.IntFlag{
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Name: "pprofport",
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Usage: "pprof HTTP server listening port",
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Value: 6060,
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}
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memprofilerateFlag = cli.IntFlag{
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Name: "memprofilerate",
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Usage: "Turn on memory profiling with the given rate",
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Value: runtime.MemProfileRate,
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}
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blockprofilerateFlag = cli.IntFlag{
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Name: "blockprofilerate",
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Usage: "Turn on block profiling with the given rate",
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}
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cpuprofileFlag = cli.StringFlag{
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Name: "cpuprofile",
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Usage: "Write CPU profile to the given file",
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}
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traceFlag = cli.StringFlag{
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Name: "trace",
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Usage: "Write execution trace to the given file",
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}
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)
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// Flags holds all command-line flags required for debugging.
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var Flags = []cli.Flag{
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verbosityFlag, vmoduleFlag, backtraceAtFlag,
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pprofFlag, pprofPortFlag,
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memprofilerateFlag, blockprofilerateFlag, cpuprofileFlag, traceFlag,
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}
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// Setup initializes profiling and logging based on the CLI flags.
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// It should be called as early as possible in the program.
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func Setup(ctx *cli.Context) error {
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// logging
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glog.CopyStandardLogTo("INFO")
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glog.SetToStderr(true)
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// profiling, tracing
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runtime.MemProfileRate = ctx.GlobalInt(memprofilerateFlag.Name)
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Handler.SetBlockProfileRate(ctx.GlobalInt(blockprofilerateFlag.Name))
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if traceFile := ctx.GlobalString(traceFlag.Name); traceFile != "" {
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if err := Handler.StartTrace(traceFile); err != nil {
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return err
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}
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}
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if cpuFile := ctx.GlobalString(cpuprofileFlag.Name); cpuFile != "" {
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if err := Handler.StartCPUProfile(cpuFile); err != nil {
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return err
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}
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}
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// pprof server
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if ctx.GlobalBool(pprofFlag.Name) {
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address := fmt.Sprintf("127.0.0.1:%d", ctx.GlobalInt(pprofPortFlag.Name))
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go func() {
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glog.V(logger.Info).Infof("starting pprof server at http://%s/debug/pprof", address)
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glog.Errorln(http.ListenAndServe(address, nil))
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}()
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}
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return nil
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}
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// Exit stops all running profiles, flushing their output to the
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// respective file.
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func Exit() {
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Handler.StopCPUProfile()
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Handler.StopTrace()
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}
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