mirror of https://go.googlesource.com/go
39 lines
1004 B
Go
39 lines
1004 B
Go
// Copyright 2009 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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//go:build cgo
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package reflect_test
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import (
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. "reflect"
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"runtime/cgo"
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"testing"
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"unsafe"
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)
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type nih struct {
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_ cgo.Incomplete
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x int
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}
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var global_nih = nih{x: 7}
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func TestNotInHeapDeref(t *testing.T) {
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// See issue 48399.
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v := ValueOf((*nih)(nil))
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v.Elem()
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shouldPanic("reflect: call of reflect.Value.Field on zero Value", func() { v.Elem().Field(0) })
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v = ValueOf(&global_nih)
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if got := v.Elem().Field(1).Int(); got != 7 {
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t.Fatalf("got %d, want 7", got)
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}
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v = ValueOf((*nih)(unsafe.Pointer(new(int))))
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shouldPanic("reflect: reflect.Value.Elem on an invalid notinheap pointer", func() { v.Elem() })
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shouldPanic("reflect: reflect.Value.Pointer on an invalid notinheap pointer", func() { v.Pointer() })
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shouldPanic("reflect: reflect.Value.UnsafePointer on an invalid notinheap pointer", func() { v.UnsafePointer() })
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}
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