55 lines
1.4 KiB
Go
55 lines
1.4 KiB
Go
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/*
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Copyright 2014 Google Inc. 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 util
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import (
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"fmt"
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"log"
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"runtime"
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)
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// ReallyCrash is for testing, to 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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// HandleCrash simply catches a crash and logs an error. Meant to be called via defer.
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func HandleCrash() {
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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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}
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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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log.Printf("Recovered from panic: %#v (%v)\n%v", r, r, callers)
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}
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