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29d1f3b85c
This change adds socket system call hooks to existing test cases for
simulating a bit complicated network conditions to help making timeout
and dual IP stack test cases work more properly in followup changes.
Also test cases print debugging information in non-short mode like the
following:
Leaked goroutines:
net.TestWriteTimeout.func2(0xc20802a5a0, 0xc20801d000, 0x1000, 0x1000, 0xc2081d2ae0)
/go/src/net/timeout_test.go:170 +0x98
created by net.TestWriteTimeout
/go/src/net/timeout_test.go:173 +0x745
net.runDatagramPacketConnServer(0xc2080730e0, 0x2bd270, 0x3, 0x2c1770, 0xb, 0xc2081d2ba0, 0xc2081d2c00)
/go/src/net/server_test.go:398 +0x667
created by net.TestTimeoutUDP
/go/src/net/timeout_test.go:247 +0xc9
(snip)
Leaked sockets:
3: {Cookie:615726511685632 Err:<nil> SocketErr:0}
5: {Cookie:7934075906097152 Err:<nil> SocketErr:0}
Socket statistical information:
{Family:1 Type:805306370 Protocol:0 Opened:17 Accepted:0 Connected:5 Closed:17}
{Family:2 Type:805306369 Protocol:0 Opened:450 Accepted:234 Connected:279 Closed:636}
{Family:1 Type:805306369 Protocol:0 Opened:11 Accepted:5 Connected:5 Closed:16}
{Family:28 Type:805306369 Protocol:0 Opened:95 Accepted:22 Connected:16 Closed:116}
{Family:2 Type:805306370 Protocol:0 Opened:84 Accepted:0 Connected:34 Closed:83}
{Family:28 Type:805306370 Protocol:0 Opened:52 Accepted:0 Connected:4 Closed:52}
Change-Id: I0e84be59a0699bc31245c78e2249423459b8cdda
Reviewed-on: https://go-review.googlesource.com/6390
Reviewed-by: Ian Lance Taylor <iant@golang.org>
79 lines
2.6 KiB
Go
79 lines
2.6 KiB
Go
// Copyright 2013 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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// This file implements sysSocket and accept for platforms that
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// provide a fast path for setting SetNonblock and CloseOnExec.
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// +build freebsd linux
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package net
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import "syscall"
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// Wrapper around the socket system call that marks the returned file
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// descriptor as nonblocking and close-on-exec.
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func sysSocket(family, sotype, proto int) (int, error) {
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s, err := socketFunc(family, sotype|syscall.SOCK_NONBLOCK|syscall.SOCK_CLOEXEC, proto)
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// On Linux the SOCK_NONBLOCK and SOCK_CLOEXEC flags were
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// introduced in 2.6.27 kernel and on FreeBSD both flags were
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// introduced in 10 kernel. If we get an EINVAL error on Linux
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// or EPROTONOSUPPORT error on FreeBSD, fall back to using
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// socket without them.
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if err == nil || (err != syscall.EPROTONOSUPPORT && err != syscall.EINVAL) {
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return s, err
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}
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// See ../syscall/exec_unix.go for description of ForkLock.
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syscall.ForkLock.RLock()
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s, err = socketFunc(family, sotype, proto)
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if err == nil {
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syscall.CloseOnExec(s)
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}
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syscall.ForkLock.RUnlock()
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if err != nil {
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return -1, err
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}
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if err = syscall.SetNonblock(s, true); err != nil {
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closeFunc(s)
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return -1, err
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}
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return s, nil
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}
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// Wrapper around the accept system call that marks the returned file
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// descriptor as nonblocking and close-on-exec.
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func accept(s int) (int, syscall.Sockaddr, error) {
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ns, sa, err := accept4Func(s, syscall.SOCK_NONBLOCK|syscall.SOCK_CLOEXEC)
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// On Linux the accept4 system call was introduced in 2.6.28
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// kernel and on FreeBSD it was introduced in 10 kernel. If we
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// get an ENOSYS error on both Linux and FreeBSD, or EINVAL
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// error on Linux, fall back to using accept.
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switch err {
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default: // nil and errors other than the ones listed
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return ns, sa, err
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case syscall.ENOSYS: // syscall missing
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case syscall.EINVAL: // some Linux use this instead of ENOSYS
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case syscall.EACCES: // some Linux use this instead of ENOSYS
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case syscall.EFAULT: // some Linux use this instead of ENOSYS
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}
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// See ../syscall/exec_unix.go for description of ForkLock.
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// It is probably okay to hold the lock across syscall.Accept
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// because we have put fd.sysfd into non-blocking mode.
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// However, a call to the File method will put it back into
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// blocking mode. We can't take that risk, so no use of ForkLock here.
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ns, sa, err = acceptFunc(s)
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if err == nil {
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syscall.CloseOnExec(ns)
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}
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if err != nil {
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return -1, nil, err
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}
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if err = syscall.SetNonblock(ns, true); err != nil {
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closeFunc(ns)
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return -1, nil, err
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}
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return ns, sa, nil
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}
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