From 47ab3d4a42e9ab51c465c4322d2ec233f6324e6b Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Sun, 28 Apr 2024 15:16:40 +0200 Subject: Adding upstream version 1.18.10. Signed-off-by: Daniel Baumann --- test/fixedbugs/issue27695.go | 62 ++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 62 insertions(+) create mode 100644 test/fixedbugs/issue27695.go (limited to 'test/fixedbugs/issue27695.go') diff --git a/test/fixedbugs/issue27695.go b/test/fixedbugs/issue27695.go new file mode 100644 index 0000000..8bd4939 --- /dev/null +++ b/test/fixedbugs/issue27695.go @@ -0,0 +1,62 @@ +// run + +// Copyright 2018 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +// Make sure return values are always scanned, when +// calling methods (+functions, TODO) with reflect. + +package main + +import ( + "reflect" + "runtime/debug" + "sync" +) + +func main() { + debug.SetGCPercent(1) // run GC frequently + var wg sync.WaitGroup + for i := 0; i < 20; i++ { + wg.Add(1) + go func() { + defer wg.Done() + for i := 0; i < 2000; i++ { + _test() + } + }() + } + wg.Wait() +} + +type Stt struct { + Data interface{} +} + +type My struct { + b byte +} + +func (this *My) Run(rawData []byte) (Stt, error) { + var data string = "hello" + stt := Stt{ + Data: data, + } + return stt, nil +} + +func _test() (interface{}, error) { + f := reflect.ValueOf(&My{}).MethodByName("Run") + if method, ok := f.Interface().(func([]byte) (Stt, error)); ok { + s, e := method(nil) + // The bug in issue27695 happens here, during the return + // from the above call (at the end of reflect.callMethod + // when preparing to return). The result value that + // is assigned to s was not being scanned if GC happens + // to occur there. + i := interface{}(s) + return i, e + } + return nil, nil +} -- cgit v1.2.3