github.com/SagerNet/gvisor@v0.0.0-20210707092255-7731c139d75c/pkg/sentry/platform/ptrace/subprocess_linux_unsafe.go (about)

     1  // Copyright 2018 The gVisor Authors.
     2  //
     3  // Licensed under the Apache License, Version 2.0 (the "License");
     4  // you may not use this file except in compliance with the License.
     5  // You may obtain a copy of the License at
     6  //
     7  //     http://www.apache.org/licenses/LICENSE-2.0
     8  //
     9  // Unless required by applicable law or agreed to in writing, software
    10  // distributed under the License is distributed on an "AS IS" BASIS,
    11  // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    12  // See the License for the specific language governing permissions and
    13  // limitations under the License.
    14  
    15  // +build linux
    16  // +build amd64 arm64
    17  
    18  package ptrace
    19  
    20  import (
    21  	"unsafe"
    22  
    23  	"golang.org/x/sys/unix"
    24  	"github.com/SagerNet/gvisor/pkg/abi/linux"
    25  )
    26  
    27  // unmaskAllSignals unmasks all signals on the current thread.
    28  //
    29  //go:nosplit
    30  func unmaskAllSignals() unix.Errno {
    31  	var set linux.SignalSet
    32  	_, _, errno := unix.RawSyscall6(unix.SYS_RT_SIGPROCMASK, linux.SIG_SETMASK, uintptr(unsafe.Pointer(&set)), 0, linux.SignalSetSize, 0, 0)
    33  	return errno
    34  }