defer_recover_results.go

     1  // run
     2  
     3  // Copyright 2021 The Go Authors. All rights reserved.
     4  // Use of this source code is governed by a BSD-style
     5  // license that can be found in the LICENSE file.
     6  
     7  // Test that when a function recovers from a panic, it
     8  // returns the correct results to the caller (in particular,
     9  // setting the result registers correctly).
    10  
    11  package main
    12  
    13  type S struct {
    14  	x uint8
    15  	y uint16
    16  	z uint32
    17  	w float64
    18  }
    19  
    20  var a0, b0, c0, d0 = 10, "hello", S{1, 2, 3, 4}, [2]int{111, 222}
    21  
    22  //go:noinline
    23  //go:registerparams
    24  func F() (a int, b string, _ int, c S, d [2]int) {
    25  	a, b, c, d = a0, b0, c0, d0
    26  	defer func() { recover() }()
    27  	panic("XXX")
    28  	return
    29  }
    30  
    31  func main() {
    32  	a1, b1, zero, c1, d1 := F()
    33  	if a1 != a0 || b1 != b0 || c1 != c0 || d1 != d0 || zero != 0 { // unnamed result gets zero value
    34  		panic("FAIL")
    35  	}
    36  }
    37
View as plain text