crash.go

     1  // Copyright 2015 The Go Authors. All rights reserved.
     2  // Use of this source code is governed by a BSD-style
     3  // license that can be found in the LICENSE file.
     4  
     5  package main
     6  
     7  import (
     8  	"fmt"
     9  	"runtime"
    10  )
    11  
    12  func init() {
    13  	register("Crash", Crash)
    14  }
    15  
    16  func test(name string) {
    17  	defer func() {
    18  		if x := recover(); x != nil {
    19  			fmt.Printf(" recovered")
    20  		}
    21  		fmt.Printf(" done\n")
    22  	}()
    23  	fmt.Printf("%s:", name)
    24  	var s *string
    25  	_ = *s
    26  	fmt.Print("SHOULD NOT BE HERE")
    27  }
    28  
    29  func testInNewThread(name string) {
    30  	c := make(chan bool)
    31  	go func() {
    32  		runtime.LockOSThread()
    33  		test(name)
    34  		c <- true
    35  	}()
    36  	<-c
    37  }
    38  
    39  func Crash() {
    40  	runtime.LockOSThread()
    41  	test("main")
    42  	testInNewThread("new-thread")
    43  	testInNewThread("second-new-thread")
    44  	test("main-again")
    45  }
    46
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