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go/misc/cgo/test/issue21897b.go

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cmd/cgo: special case C ptr types to use uintptr Some C types are declared as pointers, but C code stores non-pointers in them. When the Go garbage collector sees such a pointer, it gets unhappy. Instead, for these types represent them on the Go side with uintptr. We need this change to handle Apple's CoreFoundation CF*Ref types. Users of these types might need to update their code like we do in root_cgo_darwin.go. The only change that is required under normal circumstances is converting some nils to 0. A go fix module is provided to help. Fixes #21897 RELNOTE=yes Change-Id: I9716cfb255dc918792625f42952aa171cd31ec1b Reviewed-on: https://go-review.googlesource.com/66332 Run-TryBot: Keith Randall <khr@golang.org> Reviewed-by: Robert Griesemer <gri@golang.org> Reviewed-by: Ian Lance Taylor <iant@golang.org>
2017-09-26 16:14:50 -06:00
// Copyright 2017 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.
misc/cgo/test: disable some Darwin tests in cgo mode For unknown reasons, linking against CoreFoundation on macOS 10.10 sometimes causes mmap to ignore the hint address, which makes the Go allocator incompatible with TSAN. Currently, the effect of this is to run the allocator out of arena hints on the very first allocation, causing a "too many address space collisions for -race mode" panic. This CL skips the cgo tests that link against CoreFoundation in race mode. Updates #26475. Updates #26513. Change-Id: I52ec638c99acf5d4966e68ff0054f7679680dac6 Reviewed-on: https://go-review.googlesource.com/125304 Run-TryBot: Austin Clements <austin@google.com> TryBot-Result: Gobot Gobot <gobot@golang.org> Reviewed-by: Ian Lance Taylor <iant@golang.org> Reviewed-by: Keith Randall <khr@golang.org>
2018-07-20 13:51:40 -06:00
// +build !darwin !cgo internal race
cmd/cgo: special case C ptr types to use uintptr Some C types are declared as pointers, but C code stores non-pointers in them. When the Go garbage collector sees such a pointer, it gets unhappy. Instead, for these types represent them on the Go side with uintptr. We need this change to handle Apple's CoreFoundation CF*Ref types. Users of these types might need to update their code like we do in root_cgo_darwin.go. The only change that is required under normal circumstances is converting some nils to 0. A go fix module is provided to help. Fixes #21897 RELNOTE=yes Change-Id: I9716cfb255dc918792625f42952aa171cd31ec1b Reviewed-on: https://go-review.googlesource.com/66332 Run-TryBot: Keith Randall <khr@golang.org> Reviewed-by: Robert Griesemer <gri@golang.org> Reviewed-by: Ian Lance Taylor <iant@golang.org>
2017-09-26 16:14:50 -06:00
package cgotest
import "testing"
func test21897(t *testing.T) {
t.Skip("test runs only on darwin+cgo")
}
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