syscall: fallback to process.exit when available

Lekensteyn · Lekensteyn · commit b91438ec7a86 · 2017-10-12T16:31:14.000+01:00
"go test" currently always fails with "fatal error: all goroutines are asleep - deadlock!". In fact, all programs that use "os.Exit" will fail with this. It turns out that the current "runtime.Goexit" function throws an exception which propagates up which violates the expected behavior of the exit syscall (which should not return). Therefore call "process.exit" when available. Fixes #626
diff --git a/compiler/natives/src/syscall/syscall_unix.go b/compiler/natives/src/syscall/syscall_unix.go
@@ -67,6 +67,10 @@ func Syscall(trap, a1, a2, a3 uintptr) (r1, r2 uintptr, err Errno) {
 		return uintptr(array.Length()), 0, 0
 	}
 	if trap == SYS_EXIT {
+		process := js.Global.Get("process")
+		if process != js.Undefined {
+			process.Call("exit", a1)
+		}
 		runtime.Goexit()
 	}
 	printWarning()

Original file line number	Diff line number	Diff line change
`@@ -67,6 +67,10 @@ func Syscall(trap, a1, a2, a3 uintptr) (r1, r2 uintptr, err Errno) {`
`67`	`67`	`return uintptr(array.Length()), 0, 0`
`68`	`68`	`}`
`69`	`69`	`if trap == SYS_EXIT {`
	`70`	`+ process := js.Global.Get("process")`
	`71`	`+ if process != js.Undefined {`
	`72`	`+ process.Call("exit", a1)`
	`73`	`+ }`
`70`	`74`	`runtime.Goexit()`
`71`	`75`	`}`
`72`	`76`	`printWarning()`