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79 lines
2.2 KiB
Go
79 lines
2.2 KiB
Go
/*
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Copyright 2014 The Kubernetes Authors All rights reserved.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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package runtime
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import (
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"fmt"
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"github.com/golang/glog"
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"runtime"
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)
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// For testing, bypass HandleCrash.
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var ReallyCrash bool
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// PanicHandlers is a list of functions which will be invoked when a panic happens.
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var PanicHandlers = []func(interface{}){logPanic}
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//TODO search the public functions
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// HandleCrash simply catches a crash and logs an error. Meant to be called via defer.
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// Additional context-specific handlers can be provided, and will be called in case of panic
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func HandleCrash(additionalHandlers ...func(interface{})) {
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if ReallyCrash {
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return
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}
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if r := recover(); r != nil {
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for _, fn := range PanicHandlers {
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fn(r)
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}
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for _, fn := range additionalHandlers {
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fn(r)
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}
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}
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}
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// logPanic logs the caller tree when a panic occurs.
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func logPanic(r interface{}) {
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callers := ""
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for i := 0; true; i++ {
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_, file, line, ok := runtime.Caller(i)
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if !ok {
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break
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}
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callers = callers + fmt.Sprintf("%v:%v\n", file, line)
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}
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glog.Errorf("Recovered from panic: %#v (%v)\n%v", r, r, callers)
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}
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// ErrorHandlers is a list of functions which will be invoked when an unreturnable
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// error occurs.
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var ErrorHandlers = []func(error){logError}
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// HandlerError is a method to invoke when a non-user facing piece of code cannot
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// return an error and needs to indicate it has been ignored. Invoking this method
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// is preferable to logging the error - the default behavior is to log but the
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// errors may be sent to a remote server for analysis.
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func HandleError(err error) {
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for _, fn := range ErrorHandlers {
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fn(err)
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}
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}
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// logError prints an error with the call stack of the location it was reported
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func logError(err error) {
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glog.ErrorDepth(2, err)
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}
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