github.com/SagerNet/gvisor@v0.0.0-20210707092255-7731c139d75c/runsc/boot/strace.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  package boot
    16  
    17  import (
    18  	"strings"
    19  
    20  	"github.com/SagerNet/gvisor/pkg/sentry/strace"
    21  	"github.com/SagerNet/gvisor/runsc/config"
    22  )
    23  
    24  func enableStrace(conf *config.Config) error {
    25  	// We must initialize even if strace is not enabled.
    26  	strace.Initialize()
    27  
    28  	if !conf.Strace {
    29  		return nil
    30  	}
    31  
    32  	max := conf.StraceLogSize
    33  	if max == 0 {
    34  		max = 1024
    35  	}
    36  	strace.LogMaximumSize = max
    37  
    38  	if len(conf.StraceSyscalls) == 0 {
    39  		strace.EnableAll(strace.SinkTypeLog)
    40  		return nil
    41  	}
    42  	return strace.Enable(strings.Split(conf.StraceSyscalls, ","), strace.SinkTypeLog)
    43  }