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837984f372
When cgo writes a _cgoCheckPointerN function to handle unsafe.Pointer,
use the function's argument type rather than interface{}. This permits
type errors to be detected at build time rather than run time.
Fixes #13830.
Change-Id: Ic7090905e16b977e2379670e0f83640dc192b565
Reviewed-on: https://go-review.googlesource.com/23675
Run-TryBot: Ian Lance Taylor <iant@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Austin Clements <austin@google.com>
26 lines
526 B
Go
26 lines
526 B
Go
// 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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// cgo converts C void* to Go unsafe.Pointer, so despite appearances C
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// void** is Go *unsafe.Pointer. This test verifies that we detect the
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// problem at build time.
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package main
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// typedef void v;
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// void F(v** p) {}
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import "C"
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import "unsafe"
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type v [0]byte
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func f(p **v) {
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C.F((**C.v)(unsafe.Pointer(p))) // ERROR HERE
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}
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func main() {
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var p *v
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f(&p)
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}
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