mirror of
https://github.com/golang/go
synced 2024-11-24 21:20:05 -07:00
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>
27 lines
526 B
Go
27 lines
526 B
Go
// Copyright 2016 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.
|
|
|
|
// cgo converts C void* to Go unsafe.Pointer, so despite appearances C
|
|
// void** is Go *unsafe.Pointer. This test verifies that we detect the
|
|
// problem at build time.
|
|
|
|
package main
|
|
|
|
// typedef void v;
|
|
// void F(v** p) {}
|
|
import "C"
|
|
|
|
import "unsafe"
|
|
|
|
type v [0]byte
|
|
|
|
func f(p **v) {
|
|
C.F((**C.v)(unsafe.Pointer(p))) // ERROR HERE
|
|
}
|
|
|
|
func main() {
|
|
var p *v
|
|
f(&p)
|
|
}
|