github.com/google/syzkaller@v0.0.0-20251211124644-a066d2bc4b02/tools/syz-diff/diff.go (about)

     1  // Copyright 2024 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  
     4  package main
     5  
     6  import (
     7  	"flag"
     8  	"os"
     9  
    10  	"github.com/google/syzkaller/pkg/log"
    11  	"github.com/google/syzkaller/pkg/manager"
    12  	"github.com/google/syzkaller/pkg/mgrconfig"
    13  	"github.com/google/syzkaller/prog"
    14  	"github.com/google/syzkaller/vm"
    15  )
    16  
    17  var (
    18  	flagBaseConfig = flag.String("base", "", "base config")
    19  	flagNewConfig  = flag.String("new", "", "new config (treated as the main one)")
    20  	flagDebug      = flag.Bool("debug", false, "dump all VM output to console")
    21  	flagPatch      = flag.String("patch", "", "a git patch")
    22  )
    23  
    24  func main() {
    25  	if !prog.GitRevisionKnown() {
    26  		log.Fatalf("bad syz-diff build: build with make, run bin/syz-diff")
    27  	}
    28  	flag.Parse()
    29  	log.EnableLogCaching(1000, 1<<20)
    30  
    31  	baseCfg, err := mgrconfig.LoadFile(*flagBaseConfig)
    32  	if err != nil {
    33  		log.Fatalf("base config: %v", err)
    34  	}
    35  
    36  	newCfg, err := mgrconfig.LoadFile(*flagNewConfig)
    37  	if err != nil {
    38  		log.Fatalf("new config: %v", err)
    39  	}
    40  
    41  	if *flagPatch != "" {
    42  		data, err := os.ReadFile(*flagPatch)
    43  		if err != nil {
    44  			log.Fatal(err)
    45  		}
    46  		manager.PatchFocusAreas(newCfg, [][]byte{data}, nil, nil)
    47  	}
    48  
    49  	ctx := vm.ShutdownCtx()
    50  	err = manager.RunDiffFuzzer(ctx, baseCfg, newCfg, manager.DiffFuzzerConfig{
    51  		Store: &manager.DiffFuzzerStore{BasePath: newCfg.Workdir},
    52  		Debug: *flagDebug,
    53  	})
    54  	if err != nil {
    55  		log.Fatal(err)
    56  	}
    57  }