mirror of
https://github.com/rwinkhart/sys.git
synced 2026-08-30 22:06:37 -04:00
Keith Randall
45d26eb94b
Call into libSystem (Darwin's libc equivalent) to do system calls. Raw syscalls are not a supported ABI on Darwin, they want us to use libSystem calls instead. The stdlib has already been converted to this new regime. This package is vendored into the stdlib, so we need to fix it also, then vendor it in again. Because this package isn't tied to a Go release, we need to keep the old code around and use the new code only for 1.12 and up. Update golang/go#17490 Change-Id: Idbcacff096b5bfeac871aa75dfd971570ac93322 Reviewed-on: https://go-review.googlesource.com/c/154179 Reviewed-by: Ian Lance Taylor <iant@golang.org>
210 lines
7.6 KiB
Go
210 lines
7.6 KiB
Go
// Copyright 2018 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 darwin,go1.12,amd64 darwin,go1.12,386
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package unix
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import (
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"os"
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"os/exec"
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"strings"
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"testing"
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)
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type darwinTest struct {
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name string
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f func()
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}
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// TODO(khr): decide whether to keep this test enabled permanently or
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// only temporarily.
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func TestDarwinLoader(t *testing.T) {
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// Make sure the Darwin dynamic loader can actually resolve
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// all the system calls into libSystem.dylib. Unfortunately
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// there is no easy way to test this at compile time. So we
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// implement a crazy hack here, calling into the syscall
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// function with all its arguments set to junk, and see what
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// error we get. We are happy with any error (or none) except
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// an error from the dynamic loader.
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//
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// We have to run each test in a separate subprocess for fault isolation.
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//
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// Hopefully the junk args won't accidentally ask the system to do "rm -fr /".
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//
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// In an ideal world each syscall would have its own test, so this test
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// would be unnecessary. Unfortunately, we do not live in that world.
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for _, test := range darwinTests {
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// Call the test binary recursively, giving it a magic argument
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// (see init below) and the name of the test to run.
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cmd := exec.Command(os.Args[0], "testDarwinLoader", test.name)
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// Run subprocess, collect results. Note that we expect the subprocess
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// to fail somehow, so the error is irrelevant.
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out, _ := cmd.CombinedOutput()
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if strings.Contains(string(out), "dyld: Symbol not found:") {
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t.Errorf("can't resolve %s in libSystem.dylib", test.name)
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}
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if !strings.Contains(string(out), "success") {
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// Not really an error. Might be a syscall that never returns,
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// like exit, or one that segfaults, like gettimeofday.
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t.Logf("test never finished: %s: %s", test.name, string(out))
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}
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}
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}
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func init() {
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// The test binary execs itself with the "testDarwinLoader" argument.
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// Run the test specified by os.Args[2], then panic.
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if len(os.Args) >= 3 && os.Args[1] == "testDarwinLoader" {
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for _, test := range darwinTests {
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if test.name == os.Args[2] {
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test.f()
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}
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}
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// Panic with a "success" label, so the parent process can check it.
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panic("success")
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}
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}
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// All the _trampoline functions in zsyscall_darwin_$ARCH.1_12.s
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var darwinTests = [...]darwinTest{
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{"getgroups", libc_getgroups_trampoline},
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{"setgroups", libc_setgroups_trampoline},
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{"wait4", libc_wait4_trampoline},
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{"accept", libc_accept_trampoline},
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{"bind", libc_bind_trampoline},
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{"connect", libc_connect_trampoline},
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{"socket", libc_socket_trampoline},
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{"getsockopt", libc_getsockopt_trampoline},
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{"setsockopt", libc_setsockopt_trampoline},
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{"getpeername", libc_getpeername_trampoline},
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{"getsockname", libc_getsockname_trampoline},
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{"shutdown", libc_shutdown_trampoline},
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{"socketpair", libc_socketpair_trampoline},
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{"recvfrom", libc_recvfrom_trampoline},
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{"sendto", libc_sendto_trampoline},
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{"recvmsg", libc_recvmsg_trampoline},
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{"sendmsg", libc_sendmsg_trampoline},
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{"kevent", libc_kevent_trampoline},
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{"__sysctl", libc___sysctl_trampoline},
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{"utimes", libc_utimes_trampoline},
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{"futimes", libc_futimes_trampoline},
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{"fcntl", libc_fcntl_trampoline},
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{"poll", libc_poll_trampoline},
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{"madvise", libc_madvise_trampoline},
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{"mlock", libc_mlock_trampoline},
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{"mlockall", libc_mlockall_trampoline},
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{"mprotect", libc_mprotect_trampoline},
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{"msync", libc_msync_trampoline},
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{"munlock", libc_munlock_trampoline},
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{"munlockall", libc_munlockall_trampoline},
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{"ptrace", libc_ptrace_trampoline},
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{"pipe", libc_pipe_trampoline},
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{"getxattr", libc_getxattr_trampoline},
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{"fgetxattr", libc_fgetxattr_trampoline},
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{"setxattr", libc_setxattr_trampoline},
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{"fsetxattr", libc_fsetxattr_trampoline},
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{"removexattr", libc_removexattr_trampoline},
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{"fremovexattr", libc_fremovexattr_trampoline},
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{"listxattr", libc_listxattr_trampoline},
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{"flistxattr", libc_flistxattr_trampoline},
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{"kill", libc_kill_trampoline},
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{"ioctl", libc_ioctl_trampoline},
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{"access", libc_access_trampoline},
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{"adjtime", libc_adjtime_trampoline},
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{"chdir", libc_chdir_trampoline},
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{"chflags", libc_chflags_trampoline},
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{"chmod", libc_chmod_trampoline},
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{"chown", libc_chown_trampoline},
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{"chroot", libc_chroot_trampoline},
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{"close", libc_close_trampoline},
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{"dup", libc_dup_trampoline},
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{"dup2", libc_dup2_trampoline},
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{"exchangedata", libc_exchangedata_trampoline},
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{"exit", libc_exit_trampoline},
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{"faccessat", libc_faccessat_trampoline},
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{"fchdir", libc_fchdir_trampoline},
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{"fchflags", libc_fchflags_trampoline},
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{"fchmod", libc_fchmod_trampoline},
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{"fchmodat", libc_fchmodat_trampoline},
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{"fchown", libc_fchown_trampoline},
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{"fchownat", libc_fchownat_trampoline},
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{"flock", libc_flock_trampoline},
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{"fpathconf", libc_fpathconf_trampoline},
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{"fstat64", libc_fstat64_trampoline},
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{"fstatat64", libc_fstatat64_trampoline},
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{"fstatfs64", libc_fstatfs64_trampoline},
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{"fsync", libc_fsync_trampoline},
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{"ftruncate", libc_ftruncate_trampoline},
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{"__getdirentries64", libc___getdirentries64_trampoline},
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{"getdtablesize", libc_getdtablesize_trampoline},
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{"getegid", libc_getegid_trampoline},
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{"geteuid", libc_geteuid_trampoline},
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{"getgid", libc_getgid_trampoline},
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{"getpgid", libc_getpgid_trampoline},
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{"getpgrp", libc_getpgrp_trampoline},
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{"getpid", libc_getpid_trampoline},
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{"getppid", libc_getppid_trampoline},
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{"getpriority", libc_getpriority_trampoline},
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{"getrlimit", libc_getrlimit_trampoline},
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{"getrusage", libc_getrusage_trampoline},
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{"getsid", libc_getsid_trampoline},
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{"getuid", libc_getuid_trampoline},
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{"issetugid", libc_issetugid_trampoline},
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{"kqueue", libc_kqueue_trampoline},
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{"lchown", libc_lchown_trampoline},
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{"link", libc_link_trampoline},
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{"linkat", libc_linkat_trampoline},
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{"listen", libc_listen_trampoline},
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{"lstat64", libc_lstat64_trampoline},
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{"mkdir", libc_mkdir_trampoline},
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{"mkdirat", libc_mkdirat_trampoline},
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{"mkfifo", libc_mkfifo_trampoline},
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{"mknod", libc_mknod_trampoline},
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{"open", libc_open_trampoline},
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{"openat", libc_openat_trampoline},
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{"pathconf", libc_pathconf_trampoline},
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{"pread", libc_pread_trampoline},
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{"pwrite", libc_pwrite_trampoline},
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{"read", libc_read_trampoline},
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{"readlink", libc_readlink_trampoline},
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{"readlinkat", libc_readlinkat_trampoline},
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{"rename", libc_rename_trampoline},
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{"renameat", libc_renameat_trampoline},
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{"revoke", libc_revoke_trampoline},
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{"rmdir", libc_rmdir_trampoline},
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{"lseek", libc_lseek_trampoline},
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{"select", libc_select_trampoline},
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{"setegid", libc_setegid_trampoline},
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{"seteuid", libc_seteuid_trampoline},
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{"setgid", libc_setgid_trampoline},
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{"setlogin", libc_setlogin_trampoline},
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{"setpgid", libc_setpgid_trampoline},
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{"setpriority", libc_setpriority_trampoline},
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{"setprivexec", libc_setprivexec_trampoline},
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{"setregid", libc_setregid_trampoline},
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{"setreuid", libc_setreuid_trampoline},
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{"setrlimit", libc_setrlimit_trampoline},
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{"setsid", libc_setsid_trampoline},
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{"settimeofday", libc_settimeofday_trampoline},
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{"setuid", libc_setuid_trampoline},
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{"stat64", libc_stat64_trampoline},
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{"statfs64", libc_statfs64_trampoline},
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{"symlink", libc_symlink_trampoline},
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{"symlinkat", libc_symlinkat_trampoline},
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{"sync", libc_sync_trampoline},
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{"truncate", libc_truncate_trampoline},
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{"umask", libc_umask_trampoline},
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{"undelete", libc_undelete_trampoline},
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{"unlink", libc_unlink_trampoline},
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{"unlinkat", libc_unlinkat_trampoline},
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{"unmount", libc_unmount_trampoline},
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{"write", libc_write_trampoline},
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{"mmap", libc_mmap_trampoline},
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{"munmap", libc_munmap_trampoline},
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{"gettimeofday", libc_gettimeofday_trampoline},
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}
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