mirror of
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a76c4d0a00
In Go 1.17 we will introduce a register-based ABI on some platforms, as well as ABI wrappers to bridge the ABIs. For Darwin syscall wrappers, it needs to be called directly, instead of through wrappers. Currently, it is written as that the syscall functions are defined in assembly and their addresses are taken from Go using funcPC. In Go 1.17 this will result in the address of the ABI wrapper, which is undesired. In the syscall package in the standard library we changed to use a compiler intrinsic internal/abi.FuncPCABI0 to take the address of the syscall function. But that is not available to this repo and not available in older versions of Go. Here we take a different approach: taking the address directly from assembly. This also ensures we get the address of the defined syscall function, not the ABI wrapper. Updates golang/go#45702. Change-Id: Ia7480d0fb0ca4fb9bf2f36d2deb1e3e5e4eb8284 Reviewed-on: https://go-review.googlesource.com/c/sys/+/317894 Trust: Cherry Mui <cherryyz@google.com> Run-TryBot: Cherry Mui <cherryyz@google.com> TryBot-Result: Go Bot <gobot@golang.org> Reviewed-by: Than McIntosh <thanm@google.com>
211 lines
8.3 KiB
Go
211 lines
8.3 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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//go:build darwin && go1.12 && amd64
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// +build darwin,go1.12,amd64
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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 uintptr
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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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syscall_syscall(test.f, ^uintptr(0), ^uintptr(0), ^uintptr(0))
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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.s
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var darwinTests = [...]darwinTest{
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{"getgroups", libc_getgroups_trampoline_addr},
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{"setgroups", libc_setgroups_trampoline_addr},
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{"wait4", libc_wait4_trampoline_addr},
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{"accept", libc_accept_trampoline_addr},
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{"bind", libc_bind_trampoline_addr},
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{"connect", libc_connect_trampoline_addr},
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{"socket", libc_socket_trampoline_addr},
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{"getsockopt", libc_getsockopt_trampoline_addr},
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{"setsockopt", libc_setsockopt_trampoline_addr},
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{"getpeername", libc_getpeername_trampoline_addr},
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{"getsockname", libc_getsockname_trampoline_addr},
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{"shutdown", libc_shutdown_trampoline_addr},
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{"socketpair", libc_socketpair_trampoline_addr},
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{"recvfrom", libc_recvfrom_trampoline_addr},
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{"sendto", libc_sendto_trampoline_addr},
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{"recvmsg", libc_recvmsg_trampoline_addr},
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{"sendmsg", libc_sendmsg_trampoline_addr},
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{"kevent", libc_kevent_trampoline_addr},
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{"sysctl", libc_sysctl_trampoline_addr},
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{"utimes", libc_utimes_trampoline_addr},
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{"futimes", libc_futimes_trampoline_addr},
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{"fcntl", libc_fcntl_trampoline_addr},
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{"poll", libc_poll_trampoline_addr},
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{"madvise", libc_madvise_trampoline_addr},
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{"mlock", libc_mlock_trampoline_addr},
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{"mlockall", libc_mlockall_trampoline_addr},
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{"mprotect", libc_mprotect_trampoline_addr},
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{"msync", libc_msync_trampoline_addr},
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{"munlock", libc_munlock_trampoline_addr},
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{"munlockall", libc_munlockall_trampoline_addr},
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{"ptrace", libc_ptrace_trampoline_addr},
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{"pipe", libc_pipe_trampoline_addr},
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{"getxattr", libc_getxattr_trampoline_addr},
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{"fgetxattr", libc_fgetxattr_trampoline_addr},
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{"setxattr", libc_setxattr_trampoline_addr},
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{"fsetxattr", libc_fsetxattr_trampoline_addr},
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{"removexattr", libc_removexattr_trampoline_addr},
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{"fremovexattr", libc_fremovexattr_trampoline_addr},
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{"listxattr", libc_listxattr_trampoline_addr},
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{"flistxattr", libc_flistxattr_trampoline_addr},
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{"kill", libc_kill_trampoline_addr},
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{"ioctl", libc_ioctl_trampoline_addr},
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{"access", libc_access_trampoline_addr},
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{"adjtime", libc_adjtime_trampoline_addr},
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{"chdir", libc_chdir_trampoline_addr},
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{"chflags", libc_chflags_trampoline_addr},
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{"chmod", libc_chmod_trampoline_addr},
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{"chown", libc_chown_trampoline_addr},
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{"chroot", libc_chroot_trampoline_addr},
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{"close", libc_close_trampoline_addr},
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{"dup", libc_dup_trampoline_addr},
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{"dup2", libc_dup2_trampoline_addr},
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{"exchangedata", libc_exchangedata_trampoline_addr},
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{"exit", libc_exit_trampoline_addr},
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{"faccessat", libc_faccessat_trampoline_addr},
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{"fchdir", libc_fchdir_trampoline_addr},
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{"fchflags", libc_fchflags_trampoline_addr},
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{"fchmod", libc_fchmod_trampoline_addr},
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{"fchmodat", libc_fchmodat_trampoline_addr},
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{"fchown", libc_fchown_trampoline_addr},
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{"fchownat", libc_fchownat_trampoline_addr},
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{"flock", libc_flock_trampoline_addr},
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{"fpathconf", libc_fpathconf_trampoline_addr},
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{"fstat64", libc_fstat64_trampoline_addr},
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{"fstatat64", libc_fstatat64_trampoline_addr},
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{"fstatfs64", libc_fstatfs64_trampoline_addr},
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{"fsync", libc_fsync_trampoline_addr},
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{"ftruncate", libc_ftruncate_trampoline_addr},
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{"getdtablesize", libc_getdtablesize_trampoline_addr},
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{"getegid", libc_getegid_trampoline_addr},
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{"geteuid", libc_geteuid_trampoline_addr},
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{"getgid", libc_getgid_trampoline_addr},
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{"getpgid", libc_getpgid_trampoline_addr},
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{"getpgrp", libc_getpgrp_trampoline_addr},
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{"getpid", libc_getpid_trampoline_addr},
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{"getppid", libc_getppid_trampoline_addr},
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{"getpriority", libc_getpriority_trampoline_addr},
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{"getrlimit", libc_getrlimit_trampoline_addr},
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{"getrusage", libc_getrusage_trampoline_addr},
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{"getsid", libc_getsid_trampoline_addr},
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{"getuid", libc_getuid_trampoline_addr},
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{"issetugid", libc_issetugid_trampoline_addr},
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{"kqueue", libc_kqueue_trampoline_addr},
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{"lchown", libc_lchown_trampoline_addr},
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{"link", libc_link_trampoline_addr},
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{"linkat", libc_linkat_trampoline_addr},
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{"listen", libc_listen_trampoline_addr},
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{"lstat64", libc_lstat64_trampoline_addr},
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{"mkdir", libc_mkdir_trampoline_addr},
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{"mkdirat", libc_mkdirat_trampoline_addr},
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{"mkfifo", libc_mkfifo_trampoline_addr},
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{"mknod", libc_mknod_trampoline_addr},
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{"open", libc_open_trampoline_addr},
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{"openat", libc_openat_trampoline_addr},
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{"pathconf", libc_pathconf_trampoline_addr},
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{"pread", libc_pread_trampoline_addr},
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{"pwrite", libc_pwrite_trampoline_addr},
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{"read", libc_read_trampoline_addr},
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{"readlink", libc_readlink_trampoline_addr},
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{"readlinkat", libc_readlinkat_trampoline_addr},
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{"rename", libc_rename_trampoline_addr},
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{"renameat", libc_renameat_trampoline_addr},
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{"revoke", libc_revoke_trampoline_addr},
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{"rmdir", libc_rmdir_trampoline_addr},
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{"lseek", libc_lseek_trampoline_addr},
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{"select", libc_select_trampoline_addr},
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{"setegid", libc_setegid_trampoline_addr},
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{"seteuid", libc_seteuid_trampoline_addr},
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{"setgid", libc_setgid_trampoline_addr},
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{"setlogin", libc_setlogin_trampoline_addr},
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{"setpgid", libc_setpgid_trampoline_addr},
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{"setpriority", libc_setpriority_trampoline_addr},
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{"setprivexec", libc_setprivexec_trampoline_addr},
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{"setregid", libc_setregid_trampoline_addr},
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{"setreuid", libc_setreuid_trampoline_addr},
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{"setrlimit", libc_setrlimit_trampoline_addr},
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{"setsid", libc_setsid_trampoline_addr},
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{"settimeofday", libc_settimeofday_trampoline_addr},
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{"setuid", libc_setuid_trampoline_addr},
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{"stat64", libc_stat64_trampoline_addr},
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{"statfs64", libc_statfs64_trampoline_addr},
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{"symlink", libc_symlink_trampoline_addr},
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{"symlinkat", libc_symlinkat_trampoline_addr},
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{"sync", libc_sync_trampoline_addr},
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{"truncate", libc_truncate_trampoline_addr},
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{"umask", libc_umask_trampoline_addr},
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{"undelete", libc_undelete_trampoline_addr},
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{"unlink", libc_unlink_trampoline_addr},
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{"unlinkat", libc_unlinkat_trampoline_addr},
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{"unmount", libc_unmount_trampoline_addr},
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{"write", libc_write_trampoline_addr},
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{"mmap", libc_mmap_trampoline_addr},
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{"munmap", libc_munmap_trampoline_addr},
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{"gettimeofday", libc_gettimeofday_trampoline_addr},
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{"getfsstat64", libc_getfsstat64_trampoline_addr},
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}
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