mirror of
https://github.com/go-gitea/gitea.git
synced 2024-12-27 02:36:22 +01:00
9b2536b78f
Misspell 0.5.0 supports passing a csv file to extend the list of misspellings, so I added some common ones from the codebase. There is at least one typo in a API response so we need to decided whether to revert that and then likely remove the dict entry.
244 lines
8.2 KiB
Go
244 lines
8.2 KiB
Go
// Copyright 2014 The Gogs Authors. All rights reserved.
|
|
// Copyright 2019 The Gitea Authors. All rights reserved.
|
|
// SPDX-License-Identifier: MIT
|
|
|
|
package process
|
|
|
|
import (
|
|
"context"
|
|
"runtime/pprof"
|
|
"strconv"
|
|
"sync"
|
|
"sync/atomic"
|
|
"time"
|
|
)
|
|
|
|
// TODO: This packages still uses a singleton for the Manager.
|
|
// Once there's a decent web framework and dependencies are passed around like they should,
|
|
// then we delete the singleton.
|
|
|
|
var (
|
|
manager *Manager
|
|
managerInit sync.Once
|
|
|
|
// DefaultContext is the default context to run processing commands in
|
|
DefaultContext = context.Background()
|
|
)
|
|
|
|
// DescriptionPProfLabel is a label set on goroutines that have a process attached
|
|
const DescriptionPProfLabel = "process-description"
|
|
|
|
// PIDPProfLabel is a label set on goroutines that have a process attached
|
|
const PIDPProfLabel = "pid"
|
|
|
|
// PPIDPProfLabel is a label set on goroutines that have a process attached
|
|
const PPIDPProfLabel = "ppid"
|
|
|
|
// ProcessTypePProfLabel is a label set on goroutines that have a process attached
|
|
const ProcessTypePProfLabel = "process-type"
|
|
|
|
// IDType is a pid type
|
|
type IDType string
|
|
|
|
// FinishedFunc is a function that marks that the process is finished and can be removed from the process table
|
|
// - it is simply an alias for context.CancelFunc and is only for documentary purposes
|
|
type FinishedFunc = context.CancelFunc
|
|
|
|
var (
|
|
traceDisabled atomic.Int64
|
|
TraceCallback = defaultTraceCallback // this global can be overridden by particular logging packages - thus avoiding import cycles
|
|
)
|
|
|
|
// defaultTraceCallback is a no-op. Without a proper TraceCallback (provided by the logger system), this "Trace" level messages shouldn't be outputted.
|
|
func defaultTraceCallback(skip int, start bool, pid IDType, description string, parentPID IDType, typ string) {
|
|
}
|
|
|
|
// TraceLogDisable disables (or revert the disabling) the trace log for the process lifecycle.
|
|
// eg: the logger system shouldn't print the trace log for themselves, that's cycle dependency (Logger -> ProcessManager -> TraceCallback -> Logger ...)
|
|
// Theoretically, such trace log should only be enabled when the logger system is ready with a proper level, so the default TraceCallback is a no-op.
|
|
func TraceLogDisable(v bool) {
|
|
if v {
|
|
traceDisabled.Add(1)
|
|
} else {
|
|
traceDisabled.Add(-1)
|
|
}
|
|
}
|
|
|
|
func Trace(start bool, pid IDType, description string, parentPID IDType, typ string) {
|
|
if traceDisabled.Load() != 0 {
|
|
// the traceDisabled counter is mainly for recursive calls, so no concurrency problem.
|
|
// because the counter can't be 0 since the caller function hasn't returned (decreased the counter) yet.
|
|
return
|
|
}
|
|
TraceCallback(1, start, pid, description, parentPID, typ)
|
|
}
|
|
|
|
// Manager manages all processes and counts PIDs.
|
|
type Manager struct {
|
|
mutex sync.Mutex
|
|
|
|
next int64
|
|
lastTime int64
|
|
|
|
processMap map[IDType]*process
|
|
}
|
|
|
|
// GetManager returns a Manager and initializes one as singleton if there's none yet
|
|
func GetManager() *Manager {
|
|
managerInit.Do(func() {
|
|
manager = &Manager{
|
|
processMap: make(map[IDType]*process),
|
|
next: 1,
|
|
}
|
|
})
|
|
return manager
|
|
}
|
|
|
|
// AddContext creates a new context and adds it as a process. Once the process is finished, finished must be called
|
|
// to remove the process from the process table. It should not be called until the process is finished but must always be called.
|
|
//
|
|
// cancel should be used to cancel the returned context, however it will not remove the process from the process table.
|
|
// finished will cancel the returned context and remove it from the process table.
|
|
//
|
|
// Most processes will not need to use the cancel function but there will be cases whereby you want to cancel the process but not immediately remove it from the
|
|
// process table.
|
|
func (pm *Manager) AddContext(parent context.Context, description string) (ctx context.Context, cancel context.CancelFunc, finished FinishedFunc) {
|
|
ctx, cancel = context.WithCancel(parent)
|
|
|
|
ctx, _, finished = pm.Add(ctx, description, cancel, NormalProcessType, true)
|
|
|
|
return ctx, cancel, finished
|
|
}
|
|
|
|
// AddTypedContext creates a new context and adds it as a process. Once the process is finished, finished must be called
|
|
// to remove the process from the process table. It should not be called until the process is finished but must always be called.
|
|
//
|
|
// cancel should be used to cancel the returned context, however it will not remove the process from the process table.
|
|
// finished will cancel the returned context and remove it from the process table.
|
|
//
|
|
// Most processes will not need to use the cancel function but there will be cases whereby you want to cancel the process but not immediately remove it from the
|
|
// process table.
|
|
func (pm *Manager) AddTypedContext(parent context.Context, description, processType string, currentlyRunning bool) (ctx context.Context, cancel context.CancelFunc, finished FinishedFunc) {
|
|
ctx, cancel = context.WithCancel(parent)
|
|
|
|
ctx, _, finished = pm.Add(ctx, description, cancel, processType, currentlyRunning)
|
|
|
|
return ctx, cancel, finished
|
|
}
|
|
|
|
// AddContextTimeout creates a new context and add it as a process. Once the process is finished, finished must be called
|
|
// to remove the process from the process table. It should not be called until the process is finished but must always be called.
|
|
//
|
|
// cancel should be used to cancel the returned context, however it will not remove the process from the process table.
|
|
// finished will cancel the returned context and remove it from the process table.
|
|
//
|
|
// Most processes will not need to use the cancel function but there will be cases whereby you want to cancel the process but not immediately remove it from the
|
|
// process table.
|
|
func (pm *Manager) AddContextTimeout(parent context.Context, timeout time.Duration, description string) (ctx context.Context, cancel context.CancelFunc, finished FinishedFunc) {
|
|
if timeout <= 0 {
|
|
// it's meaningless to use timeout <= 0, and it must be a bug! so we must panic here to tell developers to make the timeout correct
|
|
panic("the timeout must be greater than zero, otherwise the context will be cancelled immediately")
|
|
}
|
|
|
|
ctx, cancel = context.WithTimeout(parent, timeout)
|
|
|
|
ctx, _, finished = pm.Add(ctx, description, cancel, NormalProcessType, true)
|
|
|
|
return ctx, cancel, finished
|
|
}
|
|
|
|
// Add create a new process
|
|
func (pm *Manager) Add(ctx context.Context, description string, cancel context.CancelFunc, processType string, currentlyRunning bool) (context.Context, IDType, FinishedFunc) {
|
|
parentPID := GetParentPID(ctx)
|
|
|
|
pm.mutex.Lock()
|
|
start, pid := pm.nextPID()
|
|
|
|
parent := pm.processMap[parentPID]
|
|
if parent == nil {
|
|
parentPID = ""
|
|
}
|
|
|
|
process := &process{
|
|
PID: pid,
|
|
ParentPID: parentPID,
|
|
Description: description,
|
|
Start: start,
|
|
Cancel: cancel,
|
|
Type: processType,
|
|
}
|
|
|
|
var finished FinishedFunc
|
|
if currentlyRunning {
|
|
finished = func() {
|
|
cancel()
|
|
pm.remove(process)
|
|
pprof.SetGoroutineLabels(ctx)
|
|
}
|
|
} else {
|
|
finished = func() {
|
|
cancel()
|
|
pm.remove(process)
|
|
}
|
|
}
|
|
|
|
pm.processMap[pid] = process
|
|
pm.mutex.Unlock()
|
|
|
|
Trace(true, pid, description, parentPID, processType)
|
|
|
|
pprofCtx := pprof.WithLabels(ctx, pprof.Labels(DescriptionPProfLabel, description, PPIDPProfLabel, string(parentPID), PIDPProfLabel, string(pid), ProcessTypePProfLabel, processType))
|
|
if currentlyRunning {
|
|
pprof.SetGoroutineLabels(pprofCtx)
|
|
}
|
|
|
|
return &Context{
|
|
Context: pprofCtx,
|
|
pid: pid,
|
|
}, pid, finished
|
|
}
|
|
|
|
// nextPID will return the next available PID. pm.mutex should already be locked.
|
|
func (pm *Manager) nextPID() (start time.Time, pid IDType) {
|
|
start = time.Now()
|
|
startUnix := start.Unix()
|
|
if pm.lastTime == startUnix {
|
|
pm.next++
|
|
} else {
|
|
pm.next = 1
|
|
}
|
|
pm.lastTime = startUnix
|
|
pid = IDType(strconv.FormatInt(start.Unix(), 16))
|
|
|
|
if pm.next == 1 {
|
|
return start, pid
|
|
}
|
|
pid = IDType(string(pid) + "-" + strconv.FormatInt(pm.next, 10))
|
|
return start, pid
|
|
}
|
|
|
|
func (pm *Manager) remove(process *process) {
|
|
deleted := false
|
|
|
|
pm.mutex.Lock()
|
|
if pm.processMap[process.PID] == process {
|
|
delete(pm.processMap, process.PID)
|
|
deleted = true
|
|
}
|
|
pm.mutex.Unlock()
|
|
|
|
if deleted {
|
|
Trace(false, process.PID, process.Description, process.ParentPID, process.Type)
|
|
}
|
|
}
|
|
|
|
// Cancel a process in the ProcessManager.
|
|
func (pm *Manager) Cancel(pid IDType) {
|
|
pm.mutex.Lock()
|
|
process, ok := pm.processMap[pid]
|
|
pm.mutex.Unlock()
|
|
if ok && process.Type != SystemProcessType {
|
|
process.Cancel()
|
|
}
|
|
}
|