// Go support for leveled logs, analogous to https://github.com/google/glog.
//
// Copyright 2023 Google Inc. All Rights Reserved.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//     http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

//go:build linux

package glog

import (
	"errors"
	"runtime"
	"syscall"
)

// abortProcess attempts to kill the current process in a way that will dump the
// currently-running goroutines someplace useful (like stderr).
//
// It does this by sending SIGABRT to the current thread.
//
// If successful, abortProcess does not return.
func abortProcess() error {
	runtime.LockOSThread()
	if err := syscall.Tgkill(syscall.Getpid(), syscall.Gettid(), syscall.SIGABRT); err != nil {
		return err
	}
	return errors.New("log: killed current thread with SIGABRT, but still running")
}