github.com/google/syzkaller@v0.0.0-20240517125934-c0f1611a36d6/pkg/vcs/testos.go (about)

     1  // Copyright 2019 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 vcs
     5  
     6  import (
     7  	"fmt"
     8  
     9  	"github.com/google/syzkaller/pkg/debugtracer"
    10  	"github.com/google/syzkaller/pkg/report/crash"
    11  	"github.com/google/syzkaller/sys/targets"
    12  )
    13  
    14  type testos struct {
    15  	*git
    16  }
    17  
    18  var _ ConfigMinimizer = new(testos)
    19  
    20  func newTestos(dir string, opts []RepoOpt) *testos {
    21  	return &testos{
    22  		git: newGit(dir, nil, opts),
    23  	}
    24  }
    25  
    26  func (ctx *testos) PreviousReleaseTags(commit, compilerType string) ([]string, error) {
    27  	return ctx.git.previousReleaseTags(commit, false, false, false)
    28  }
    29  
    30  func (ctx *testos) EnvForCommit(
    31  	defaultCompiler, compilerType, binDir, commit string, kernelConfig []byte,
    32  	backports []BackportCommit,
    33  ) (*BisectEnv, error) {
    34  	return &BisectEnv{KernelConfig: kernelConfig}, nil
    35  }
    36  
    37  func (ctx *testos) Minimize(target *targets.Target, original, baseline []byte, types []crash.Type,
    38  	dt debugtracer.DebugTracer, pred func(test []byte) (BisectResult, error)) ([]byte, error) {
    39  	if len(baseline) == 0 {
    40  		return original, nil
    41  	}
    42  	if res, err := pred(baseline); err != nil {
    43  		return nil, err
    44  	} else if res == BisectBad {
    45  		return baseline, nil
    46  	}
    47  	switch string(baseline) {
    48  	case "minimize-fails":
    49  		return nil, fmt.Errorf("minimization failure")
    50  	case "minimize-succeeds":
    51  		config := []byte("new-minimized-config")
    52  		pred(config)
    53  		return config, nil
    54  	default:
    55  		return original, nil
    56  	}
    57  }
    58  
    59  func (ctx *testos) PrepareBisect() error {
    60  	return nil
    61  }