| // Copyright 2016 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. |
| |
| //go:build freebsd |
| // +build freebsd |
| |
| package os |
| |
| import ( |
| "runtime" |
| "syscall" |
| ) |
| |
| const _P_PID = 0 |
| |
| // blockUntilWaitable attempts to block until a call to p.Wait will |
| // succeed immediately, and reports whether it has done so. |
| // It does not actually call p.Wait. |
| func (p *Process) blockUntilWaitable() (bool, error) { |
| var errno syscall.Errno |
| for { |
| // The arguments on 32-bit FreeBSD look like the following: |
| // - freebsd32_wait6_args{ idtype, id1, id2, status, options, wrusage, info } or |
| // - freebsd32_wait6_args{ idtype, pad, id1, id2, status, options, wrusage, info } when PAD64_REQUIRED=1 on ARM, MIPS or PowerPC |
| if runtime.GOARCH == "386" { |
| _, _, errno = syscall.Syscall9(syscall.SYS_WAIT6, _P_PID, uintptr(p.Pid), 0, 0, syscall.WEXITED|syscall.WNOWAIT, 0, 0, 0, 0) |
| } else if runtime.GOARCH == "arm" { |
| _, _, errno = syscall.Syscall9(syscall.SYS_WAIT6, _P_PID, 0, uintptr(p.Pid), 0, 0, syscall.WEXITED|syscall.WNOWAIT, 0, 0, 0) |
| } else { |
| _, _, errno = syscall.Syscall6(syscall.SYS_WAIT6, _P_PID, uintptr(p.Pid), 0, syscall.WEXITED|syscall.WNOWAIT, 0, 0) |
| } |
| if errno != syscall.EINTR { |
| break |
| } |
| } |
| runtime.KeepAlive(p) |
| if errno != 0 { |
| return false, NewSyscallError("wait6", errno) |
| } |
| return true, nil |
| } |