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