go crash 源码
golang crash 代码
文件路径：/src/runtime/testdata/testprog/crash.go
// Copyright 2015 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
package main
import (
"fmt"
"runtime"
)
func init() {
register("Crash", Crash)
register("DoublePanic", DoublePanic)
register("ErrorPanic", ErrorPanic)
register("StringerPanic", StringerPanic)
register("DoubleErrorPanic", DoubleErrorPanic)
register("DoubleStringerPanic", DoubleStringerPanic)
register("StringPanic", StringPanic)
register("NilPanic", NilPanic)
register("CircularPanic", CircularPanic)
}
func test(name string) {
defer func() {
if x := recover(); x != nil {
fmt.Printf(" recovered")
}
fmt.Printf(" done\n")
}()
fmt.Printf("%s:", name)
var s *string
_ = *s
fmt.Print("SHOULD NOT BE HERE")
}
func testInNewThread(name string) {
c := make(chan bool)
go func() {
runtime.LockOSThread()
test(name)
c <- true
}()
<-c
}
func Crash() {
runtime.LockOSThread()
test("main")
testInNewThread("new-thread")
testInNewThread("second-new-thread")
test("main-again")
}
type P string
func (p P) String() string {
// Try to free the "YYY" string header when the "XXX"
// panic is stringified.
runtime.GC()
runtime.GC()
runtime.GC()
return string(p)
}
// Test that panic message is not clobbered.
// See issue 30150.
func DoublePanic() {
defer func() {
panic(P("YYY"))
}()
panic(P("XXX"))
}
// Test that panic while panicking discards error message
// See issue 52257
type exampleError struct{}
func (e exampleError) Error() string {
panic("important error message")
}
func ErrorPanic() {
panic(exampleError{})
}
type examplePanicError struct{}
func (e examplePanicError) Error() string {
panic(exampleError{})
}
func DoubleErrorPanic() {
panic(examplePanicError{})
}
type exampleStringer struct{}
func (s exampleStringer) String() string {
panic("important stringer message")
}
func StringerPanic() {
panic(exampleStringer{})
}
type examplePanicStringer struct{}
func (s examplePanicStringer) String() string {
panic(exampleStringer{})
}
func DoubleStringerPanic() {
panic(examplePanicStringer{})
}
func StringPanic() {
panic("important string message")
}
func NilPanic() {
panic(nil)
}
type exampleCircleStartError struct{}
func (e exampleCircleStartError) Error() string {
panic(exampleCircleEndError{})
}
type exampleCircleEndError struct{}
func (e exampleCircleEndError) Error() string {
panic(exampleCircleStartError{})
}
func CircularPanic() {
panic(exampleCircleStartError{})
}
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