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// Copyright 2022 syzkaller project authors. All rights reserved.
// Use of this source code is governed by Apache 2 LICENSE that can be found in the LICENSE file.
package repro
import (
"context"
"fmt"
"github.com/google/syzkaller/pkg/instance"
"github.com/google/syzkaller/pkg/log"
"github.com/google/syzkaller/pkg/mgrconfig"
"github.com/google/syzkaller/pkg/report"
"github.com/google/syzkaller/vm"
"github.com/google/syzkaller/vm/dispatcher"
)
type StraceResult struct {
Report *report.Report
Output []byte
Error error
}
const (
straceOutputLogSize = 2048 << 10
)
func RunStrace(result *Result, cfg *mgrconfig.Config, reporter *report.Reporter, pool *vm.Dispatcher) *StraceResult {
if cfg.StraceBin == "" {
return straceFailed(fmt.Errorf("strace binary is not set in the config"))
}
var runRes *instance.RunResult
var err error
runErr := pool.Run(context.Background(), func(ctx context.Context, inst *vm.Instance, updInfo dispatcher.UpdateInfo) {
updInfo(func(info *dispatcher.Info) {
info.Status = "running strace"
})
ret, setupErr := instance.SetupExecProg(inst, cfg, reporter,
&instance.OptionalConfig{
StraceBin: cfg.StraceBin,
BeforeContextLen: straceOutputLogSize,
})
if setupErr != nil {
err = fmt.Errorf("failed to set up instance: %w", setupErr)
return
}
params := instance.ExecParams{
Opts: result.Opts,
Duration: result.Duration,
}
if result.CRepro {
log.Logf(1, "running C repro under strace")
params.CProg = result.Prog
runRes, err = ret.RunCProg(params)
} else {
log.Logf(1, "running syz repro under strace")
params.SyzProg = result.Prog.Serialize()
runRes, err = ret.RunSyzProg(params)
}
})
if runErr != nil {
return straceFailed(runErr)
} else if err != nil {
return straceFailed(err)
}
return &StraceResult{
Report: runRes.Report,
Output: runRes.Output,
}
}
func straceFailed(err error) *StraceResult {
return &StraceResult{Error: err}
}
func (strace *StraceResult) IsSameBug(repro *Result) bool {
if strace == nil || strace.Report == nil || repro.Report == nil {
return false
}
return strace.Report.Title == repro.Report.Title
}
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