mirror of
https://github.com/golang/go
synced 2024-10-01 12:38:31 -06:00
ddc6b64444
Make sure we do any just-before-return cleanup on all paths out of a function, including when recovering. Each exit path should include deferreturn (if there are any defers) and then the exit code (e.g. copying heap-escaping return values back to the stack). Introduce a Defer SSA block type which has two outgoing edges - one the fallthrough edge (the defer was queued successfully) and one which immediately returns (the defer had a successful recover() call and normal execution should resume at the return point). Fixes #14725 Change-Id: Iad035c9fd25ef8b7a74dafbd7461cf04833d981f Reviewed-on: https://go-review.googlesource.com/20486 Reviewed-by: David Chase <drchase@google.com>
58 lines
857 B
Go
58 lines
857 B
Go
// run
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// Copyright 2016 The Go Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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package main
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import "fmt"
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func f1() (x int) {
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for {
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defer func() {
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recover()
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x = 1
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}()
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panic(nil)
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}
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}
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var sink *int
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func f2() (x int) {
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sink = &x
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defer func() {
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recover()
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x = 1
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}()
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panic(nil)
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}
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func f3(b bool) (x int) {
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sink = &x
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defer func() {
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recover()
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x = 1
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}()
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if b {
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panic(nil)
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}
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return
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}
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func main() {
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if x := f1(); x != 1 {
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panic(fmt.Sprintf("f1 returned %d, wanted 1", x))
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}
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if x := f2(); x != 1 {
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panic(fmt.Sprintf("f2 returned %d, wanted 1", x))
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}
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if x := f3(true); x != 1 {
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panic(fmt.Sprintf("f3(true) returned %d, wanted 1", x))
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}
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if x := f3(false); x != 1 {
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panic(fmt.Sprintf("f3(false) returned %d, wanted 1", x))
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}
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}
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