54 lines
1.4 KiB
Go
54 lines
1.4 KiB
Go
/*
|
|
Copyright 2014 Google Inc. All rights reserved.
|
|
|
|
Licensed under the Apache License, Version 2.0 (the "License");
|
|
you may not use this file except in compliance with the License.
|
|
You may obtain a copy of the License at
|
|
|
|
http://www.apache.org/licenses/LICENSE-2.0
|
|
|
|
Unless required by applicable law or agreed to in writing, software
|
|
distributed under the License is distributed on an "AS IS" BASIS,
|
|
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
See the License for the specific language governing permissions and
|
|
limitations under the License.
|
|
*/
|
|
|
|
package util
|
|
|
|
import (
|
|
"fmt"
|
|
"log"
|
|
"runtime"
|
|
)
|
|
|
|
// ReallyCrash is for testing, to bypass HandleCrash.
|
|
var ReallyCrash bool
|
|
|
|
// PanicHandlers is a list of functions which will be invoked when a panic happens.
|
|
var PanicHandlers = []func(interface{}){logPanic}
|
|
|
|
// HandleCrash simply catches a crash and logs an error. Meant to be called via defer.
|
|
func HandleCrash() {
|
|
if ReallyCrash {
|
|
return
|
|
}
|
|
if r := recover(); r != nil {
|
|
for _, fn := range PanicHandlers {
|
|
fn(r)
|
|
}
|
|
}
|
|
}
|
|
|
|
// logPanic logs the caller tree when a panic occurs.
|
|
func logPanic(r interface{}) {
|
|
callers := ""
|
|
for i := 0; true; i++ {
|
|
_, file, line, ok := runtime.Caller(i)
|
|
if !ok {
|
|
break
|
|
}
|
|
callers = callers + fmt.Sprintf("%v:%v\n", file, line)
|
|
}
|
|
log.Printf("Recovered from panic: %#v (%v)\n%v", r, r, callers)
|
|
}
|