File size: 3,703 Bytes
de452ad | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 | // 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)
register("RepanickedPanic", RepanickedPanic)
register("RepanickedMiddlePanic", RepanickedMiddlePanic)
register("RepanickedPanicSandwich", RepanickedPanicSandwich)
register("DoublePanicWithSameValue", DoublePanicWithSameValue)
}
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 multi-line\nerror 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 multi-line\nstringer message")
}
func StringerPanic() {
panic(exampleStringer{})
}
type examplePanicStringer struct{}
func (s examplePanicStringer) String() string {
panic(exampleStringer{})
}
func DoubleStringerPanic() {
panic(examplePanicStringer{})
}
func StringPanic() {
panic("important multi-line\nstring 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{})
}
func RepanickedPanic() {
defer func() {
panic(recover())
}()
panic("message")
}
func RepanickedMiddlePanic() {
defer func() {
recover()
panic("outer")
}()
func() {
defer func() {
panic(recover())
}()
func() {
defer func() {
recover()
panic("middle")
}()
panic("inner")
}()
}()
}
// Panic sandwich:
//
// panic("outer") =>
// recovered, panic("inner") =>
// panic(recovered outer panic value)
//
// Exercises the edge case where we repanic a panic value,
// but with another panic in the middle.
func RepanickedPanicSandwich() {
var outer any
defer func() {
recover()
panic(outer)
}()
func() {
defer func() {
outer = recover()
panic("inner")
}()
panic("outer")
}()
}
// Double panic with same value and not recovered.
// See issue 76099.
func DoublePanicWithSameValue() {
var e any = "message"
defer func() {
panic(e)
}()
panic(e)
}
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