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misc/cgo/test: get rid of the backdoor package

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For Go 1.5, we can use go:linkname rather than assembly thunk for gc.
Gccgo already has support for //extern.

Change-Id: I5505aa247dd5b555112f7261ed2f192c81cf0bdf
Signed-off-by: Shenghou Ma <minux@golang.org>
Reviewed-on: https://go-review.googlesource.com/1888
Reviewed-by: Russ Cox <rsc@golang.org>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
This commit is contained in:
Shenghou Ma 2014-12-20 14:13:44 -05:00 committed by Minux Ma
parent 958e0792b5
commit 04cf881fbe
5 changed files with 11 additions and 46 deletions
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11
misc/cgo/test/backdoor.go Normal file
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@ -0,0 +1,11 @@
// Copyright 2014 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.
package cgotest
import _ "unsafe"
//go:linkname lockedOSThread runtime.lockedOSThread
//extern runtime_lockedOSThread
func lockedOSThread() bool

7
misc/cgo/test/backdoor/backdoor.go
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@ -1,7 +0,0 @@
// Copyright 2012 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.
package backdoor
func LockedOSThread() bool // in thunk.s or runtime_gccgo.c

18
misc/cgo/test/backdoor/runtime_gccgo.c
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@ -1,18 +0,0 @@
// Copyright 2012 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.
// Expose some runtime functions for testing.
// This is the gccgo version of thunk.s.
// +build gccgo
_Bool runtime_lockedOSThread(void);
_Bool LockedOSThread(void) asm(GOPKGPATH ".LockedOSThread");
_Bool
LockedOSThread(void)
{
return runtime_lockedOSThread();
}

17
misc/cgo/test/backdoor/thunk.s
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@ -1,17 +0,0 @@
// Copyright 2014 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.
// Assembly to get into package runtime without using exported symbols.
// +build amd64 amd64p32 arm 386
// +build gc
#include "textflag.h"
#ifdef GOARCH_arm
#define JMP B
#endif
TEXT ·LockedOSThread(SB),NOSPLIT,$0-0
JMP runtime·lockedOSThread(SB)

4
misc/cgo/test/callback.go
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@ -22,8 +22,6 @@ import (
"strings"
"testing"
"unsafe"
"./backdoor"
)
// nestedCall calls into C, back into Go, and finally to f.
@ -50,8 +48,6 @@ func testCallbackGC(t *testing.T) {
nestedCall(runtime.GC)
}
var lockedOSThread = backdoor.LockedOSThread
func testCallbackPanic(t *testing.T) {
// Make sure panic during callback unwinds properly.
if lockedOSThread() {