1 // Copyright 2020 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 testlog
6 7 import (
8 "sync"
9 _ "unsafe" // for linkname
10 )
11 12 // PanicOnExit0 reports whether to panic on a call to os.Exit(0).
13 // This is in the testlog package because, like other definitions in
14 // package testlog, it is a hook between the testing package and the
15 // os package. This is used to ensure that an early call to os.Exit(0)
16 // does not cause a test to pass.
17 func PanicOnExit0() bool {
18 panicOnExit0.mu.Lock()
19 defer panicOnExit0.mu.Unlock()
20 return panicOnExit0.val
21 }
22 23 // panicOnExit0 is the flag used for PanicOnExit0. This uses a lock
24 // because the value can be cleared via a timer call that may race
25 // with calls to os.Exit
26 var panicOnExit0 struct {
27 mu sync.Mutex
28 val bool
29 }
30 31 // SetPanicOnExit0 sets panicOnExit0 to v.
32 //
33 // SetPanicOnExit0 should be an internal detail,
34 // but alternate implementations of go test in other
35 // build systems may need to access it using linkname.
36 //
37 // Do not remove or change the type signature.
38 // See go.dev/issue/67401.
39 //
40 //go:linkname SetPanicOnExit0
41 func SetPanicOnExit0(v bool) {
42 panicOnExit0.mu.Lock()
43 defer panicOnExit0.mu.Unlock()
44 panicOnExit0.val = v
45 }
46