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misc/cgo/test: add test that gccgo fails
Gccgo isn't locking the OS thread properly during calls. Change-Id: Idb2475291405e390cbb83abb27a402fd0381d0c4 Reviewed-on: https://go-review.googlesource.com/18882 Run-TryBot: Russ Cox <rsc@golang.org> TryBot-Result: Gobot Gobot <gobot@golang.org> Reviewed-by: Russ Cox <rsc@golang.org>
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@ -162,3 +162,6 @@ func testUnsignedInt(t *testing.T) {
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func sliceOperands(array [2000]int) {
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_ = array[C.KILO:C.KILO:C.KILO] // no type error
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}
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// set in cgo_thread_lock.go init
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var testThreadLockFunc = func(*testing.T) {}
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@ -72,5 +72,6 @@ func TestCallGoWithString(t *testing.T) { testCallGoWithString(t) }
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func Test14838(t *testing.T) { test14838(t) }
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func Test8756(t *testing.T) { test8756(t) }
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func Test17065(t *testing.T) { test17065(t) }
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func TestThreadLock(t *testing.T) { testThreadLockFunc(t) }
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func BenchmarkCgoCall(b *testing.B) { benchCgoCall(b) }
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53
misc/cgo/test/cgo_thread_lock.go
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53
misc/cgo/test/cgo_thread_lock.go
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@ -0,0 +1,53 @@
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// 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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// +build linux,freebsd,openbsd
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package cgotest
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/*
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#include <unistd.h>
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#include <sys/syscall.h>
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void Gosched(void);
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static int Ctid(void) { Gosched(); return syscall(SYS_gettid); }
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*/
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import "C"
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import (
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"runtime"
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"syscall"
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"testing"
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"time"
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)
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//export Gosched
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func Gosched() {
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runtime.Gosched()
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}
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func init() {
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testThreadLockFunc = testThreadLock
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}
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func testThreadLock(t *testing.T) {
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stop := make(chan int)
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go func() {
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// We need the G continue running,
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// so the M has a chance to run this G.
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for {
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select {
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case <-stop:
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return
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case <-time.After(time.Millisecond * 100):
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}
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}
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}()
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defer close(stop)
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for i := 0; i < 1000; i++ {
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if C.int(syscall.Gettid()) != C.Ctid() {
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t.Fatalf("cgo has not locked OS thread")
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}
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}
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}
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