1// Copyright 2018 syzkaller project authors. All rights reserved. 2// Use of this source code is governed by Apache 2 LICENSE that can be found in the LICENSE file. 3 4package build 5 6import ( 7 "fmt" 8 "path/filepath" 9 "strings" 10 "time" 11 12 "github.com/google/syzkaller/pkg/osutil" 13) 14 15type gvisor struct{} 16 17func (gvisor gvisor) build(targetArch, vmType, kernelDir, outputDir, compiler, userspaceDir, 18 cmdlineFile, sysctlFile string, config []byte) error { 19 args := []string{"build", "--verbose_failures"} 20 if strings.Contains(" "+string(config)+" ", " -race ") { 21 args = append(args, "--features=race") 22 } 23 args = append(args, "runsc") 24 if _, err := osutil.RunCmd(20*time.Minute, kernelDir, compiler, args...); err != nil { 25 return err 26 } 27 if err := gvisor.copyBinary(kernelDir, outputDir); err != nil { 28 return err 29 } 30 if len(config) != 0 { 31 if err := osutil.WriteFile(filepath.Join(outputDir, "kernel.config"), config); err != nil { 32 return fmt.Errorf("failed to save kernel config: %v", err) 33 } 34 } 35 osutil.RunCmd(10*time.Minute, kernelDir, compiler, "shutdown") 36 return nil 37} 38 39func (gvisor) copyBinary(kernelDir, outputDir string) error { 40 // Funny it's not possible to understand what bazel actually built... 41 for _, typ := range []string{ 42 "linux_amd64_pure_stripped", 43 "linux_amd64_static_stripped", 44 "linux_amd64_static_race_stripped", 45 } { 46 runsc := filepath.Join(kernelDir, "bazel-bin", "runsc", typ, "runsc") 47 if !osutil.IsExist(runsc) { 48 continue 49 } 50 return osutil.CopyFile(runsc, filepath.Join(outputDir, "image")) 51 } 52 return fmt.Errorf("failed to locate bazel output") 53} 54 55func (gvisor) clean(kernelDir string) error { 56 // Let's assume that bazel always properly handles build without cleaning (until proven otherwise). 57 return nil 58} 59