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The old process manager's `Trace` function by default calls `log.Printf` to output "trace" level logs. That's not ideal because by default the trace level logs should not be outputted. In history it didn't cause problems because there was no other call to the process manager before the logger system's initialization. But if there is any package using the process manager before the "Trace" function gets assigned to the logger system's trace function, the process manager will outputs unexpected verbose messages, this behavior is not expected in most cases. Now, the logger system also uses process manager to manage its goroutine contexts, so it's the time to fix the old "trace" behavior: by default, do not output the trace level messages. Fix #24951
240 lines
6.1 KiB
Go
240 lines
6.1 KiB
Go
// Copyright 2023 The Gitea Authors. All rights reserved.
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// SPDX-License-Identifier: MIT
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package log
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import (
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"context"
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"runtime"
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"strings"
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"sync"
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"sync/atomic"
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"time"
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"code.gitea.io/gitea/modules/json"
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"code.gitea.io/gitea/modules/util"
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)
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type LoggerImpl struct {
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LevelLogger
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ctx context.Context
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ctxCancel context.CancelFunc
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level atomic.Int32
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stacktraceLevel atomic.Int32
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eventWriterMu sync.RWMutex
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eventWriters map[string]EventWriter
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}
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var (
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_ BaseLogger = (*LoggerImpl)(nil)
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_ LevelLogger = (*LoggerImpl)(nil)
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)
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// SendLogEvent sends a log event to all writers
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func (l *LoggerImpl) SendLogEvent(event *Event) {
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l.eventWriterMu.RLock()
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defer l.eventWriterMu.RUnlock()
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if len(l.eventWriters) == 0 {
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FallbackErrorf("[no logger writer]: %s", event.MsgSimpleText)
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return
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}
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// the writers have their own goroutines, the message arguments (with Stringer) shouldn't be used in other goroutines
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// so the event message must be formatted here
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msgFormat, msgArgs := event.msgFormat, event.msgArgs
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event.msgFormat, event.msgArgs = "(already processed by formatters)", nil
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for _, w := range l.eventWriters {
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if event.Level < w.GetLevel() {
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continue
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}
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formatted := &EventFormatted{
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Origin: event,
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Msg: w.Base().FormatMessage(w.Base().Mode, event, msgFormat, msgArgs...),
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}
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select {
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case w.Base().Queue <- formatted:
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default:
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bs, _ := json.Marshal(event)
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FallbackErrorf("log writer %q queue is full, event: %v", w.GetWriterName(), string(bs))
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}
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}
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}
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// syncLevelInternal syncs the level of the logger with the levels of the writers
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func (l *LoggerImpl) syncLevelInternal() {
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lowestLevel := NONE
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for _, w := range l.eventWriters {
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if w.GetLevel() < lowestLevel {
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lowestLevel = w.GetLevel()
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}
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}
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l.level.Store(int32(lowestLevel))
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lowestLevel = NONE
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for _, w := range l.eventWriters {
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if w.Base().Mode.StacktraceLevel < lowestLevel {
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lowestLevel = w.GetLevel()
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}
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}
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l.stacktraceLevel.Store(int32(lowestLevel))
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}
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// removeWriterInternal removes a writer from the logger, and stops it if it's not shared
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func (l *LoggerImpl) removeWriterInternal(w EventWriter) {
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if !w.Base().shared {
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eventWriterStopWait(w) // only stop non-shared writers, shared writers are managed by the manager
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}
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delete(l.eventWriters, w.GetWriterName())
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}
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// AddWriters adds writers to the logger, and starts them. Existing writers will be replaced by new ones.
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func (l *LoggerImpl) AddWriters(writer ...EventWriter) {
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l.eventWriterMu.Lock()
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defer l.eventWriterMu.Unlock()
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for _, w := range writer {
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if old, ok := l.eventWriters[w.GetWriterName()]; ok {
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l.removeWriterInternal(old)
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}
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}
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for _, w := range writer {
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l.eventWriters[w.GetWriterName()] = w
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eventWriterStartGo(l.ctx, w, false)
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}
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l.syncLevelInternal()
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}
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// RemoveWriter removes a writer from the logger, and the writer is closed and flushed if it is not shared
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func (l *LoggerImpl) RemoveWriter(modeName string) error {
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l.eventWriterMu.Lock()
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defer l.eventWriterMu.Unlock()
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w, ok := l.eventWriters[modeName]
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if !ok {
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return util.ErrNotExist
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}
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l.removeWriterInternal(w)
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l.syncLevelInternal()
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return nil
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}
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// RemoveAllWriters removes all writers from the logger, non-shared writers are closed and flushed
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func (l *LoggerImpl) RemoveAllWriters() *LoggerImpl {
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l.eventWriterMu.Lock()
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defer l.eventWriterMu.Unlock()
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for _, w := range l.eventWriters {
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l.removeWriterInternal(w)
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}
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l.eventWriters = map[string]EventWriter{}
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l.syncLevelInternal()
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return l
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}
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// DumpWriters dumps the writers as a JSON map, it's used for debugging and display purposes.
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func (l *LoggerImpl) DumpWriters() map[string]any {
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l.eventWriterMu.RLock()
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defer l.eventWriterMu.RUnlock()
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writers := make(map[string]any, len(l.eventWriters))
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for k, w := range l.eventWriters {
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bs, err := json.Marshal(w.Base().Mode)
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if err != nil {
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FallbackErrorf("marshal writer %q to dump failed: %v", k, err)
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continue
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}
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m := map[string]any{}
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_ = json.Unmarshal(bs, &m)
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m["WriterType"] = w.GetWriterType()
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writers[k] = m
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}
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return writers
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}
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// Close closes the logger, non-shared writers are closed and flushed
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func (l *LoggerImpl) Close() {
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l.RemoveAllWriters()
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l.ctxCancel()
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}
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// IsEnabled returns true if the logger is enabled: it has a working level and has writers
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// Fatal is not considered as enabled, because it's a special case and the process just exits
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func (l *LoggerImpl) IsEnabled() bool {
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l.eventWriterMu.RLock()
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defer l.eventWriterMu.RUnlock()
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return l.level.Load() < int32(FATAL) && len(l.eventWriters) > 0
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}
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// Log prepares the log event, if the level matches, the event will be sent to the writers
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func (l *LoggerImpl) Log(skip int, level Level, format string, logArgs ...any) {
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if Level(l.level.Load()) > level {
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return
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}
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event := &Event{
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Time: time.Now(),
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Level: level,
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Caller: "?()",
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}
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pc, filename, line, ok := runtime.Caller(skip + 1)
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if ok {
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fn := runtime.FuncForPC(pc)
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if fn != nil {
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event.Caller = fn.Name() + "()"
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}
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}
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event.Filename, event.Line = strings.TrimPrefix(filename, projectPackagePrefix), line
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if l.stacktraceLevel.Load() <= int32(level) {
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event.Stacktrace = Stack(skip + 1)
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}
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labels := getGoroutineLabels()
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if labels != nil {
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event.GoroutinePid = labels["pid"]
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}
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// get a simple text message without color
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msgArgs := make([]any, len(logArgs))
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copy(msgArgs, logArgs)
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// handle LogStringer values
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for i, v := range msgArgs {
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if cv, ok := v.(*ColoredValue); ok {
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if s, ok := cv.v.(LogStringer); ok {
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cv.v = logStringFormatter{v: s}
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}
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} else if s, ok := v.(LogStringer); ok {
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msgArgs[i] = logStringFormatter{v: s}
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}
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}
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event.MsgSimpleText = colorSprintf(false, format, msgArgs...)
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event.msgFormat = format
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event.msgArgs = msgArgs
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l.SendLogEvent(event)
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}
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func (l *LoggerImpl) GetLevel() Level {
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return Level(l.level.Load())
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}
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func NewLoggerWithWriters(ctx context.Context, name string, writer ...EventWriter) *LoggerImpl {
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l := &LoggerImpl{}
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l.ctx, l.ctxCancel = newProcessTypedContext(ctx, "Logger: "+name)
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l.LevelLogger = BaseLoggerToGeneralLogger(l)
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l.eventWriters = map[string]EventWriter{}
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l.syncLevelInternal()
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l.AddWriters(writer...)
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return l
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}
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