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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 instance
import (
"fmt"
"os"
"time"
"github.com/google/syzkaller/pkg/csource"
"github.com/google/syzkaller/pkg/mgrconfig"
"github.com/google/syzkaller/pkg/osutil"
"github.com/google/syzkaller/pkg/report"
"github.com/google/syzkaller/prog"
"github.com/google/syzkaller/vm"
)
type ExecutorLogger func(int, string, ...interface{})
type OptionalConfig struct {
ExitCondition vm.ExitCondition
Logf ExecutorLogger
OldFlagsCompatMode bool
BeforeContextLen int
}
type ExecProgInstance struct {
execprogBin string
executorBin string
reporter *report.Reporter
mgrCfg *mgrconfig.Config
VMInstance *vm.Instance
OptionalConfig
}
type RunResult struct {
vm.ExecutionResult
}
func SetupExecProg(vmInst *vm.Instance, mgrCfg *mgrconfig.Config, reporter *report.Reporter,
opt *OptionalConfig) (*ExecProgInstance, error) {
execprogBin, err := vmInst.Copy(mgrCfg.ExecprogBin)
if err != nil {
vmInst.Close()
return nil, &TestError{Title: fmt.Sprintf("failed to copy syz-execprog to VM: %v", err)}
}
executorBin := mgrCfg.SysTarget.ExecutorBin
if executorBin == "" {
executorBin, err = vmInst.Copy(mgrCfg.ExecutorBin)
if err != nil {
vmInst.Close()
return nil, &TestError{Title: fmt.Sprintf("failed to copy syz-executor to VM: %v", err)}
}
}
ret := &ExecProgInstance{
execprogBin: execprogBin,
executorBin: executorBin,
reporter: reporter,
mgrCfg: mgrCfg,
VMInstance: vmInst,
}
if opt != nil {
ret.OptionalConfig = *opt
}
if ret.Logf == nil {
ret.Logf = func(int, string, ...interface{}) {}
}
if ret.ExitCondition == 0 {
ret.ExitCondition = vm.ExitTimeout | vm.ExitNormal | vm.ExitError
}
return ret, nil
}
func CreateExecProgInstance(vmPool *vm.Pool, vmIndex int, mgrCfg *mgrconfig.Config,
reporter *report.Reporter, opt *OptionalConfig) (*ExecProgInstance, error) {
vmInst, err := vmPool.Create(vmIndex)
if err != nil {
return nil, fmt.Errorf("failed to create VM: %v", err)
}
ret, err := SetupExecProg(vmInst, mgrCfg, reporter, opt)
if err != nil {
vmInst.Close()
return nil, err
}
return ret, nil
}
func (inst *ExecProgInstance) runCommand(command string, duration time.Duration) (*RunResult, error) {
outc, errc, err := inst.VMInstance.Run(duration, nil, command)
if err != nil {
return nil, fmt.Errorf("failed to run command in VM: %v", err)
}
result := &RunResult{
ExecutionResult: *inst.VMInstance.MonitorExecutionRaw(outc, errc,
inst.reporter, inst.ExitCondition, inst.BeforeContextLen),
}
if result.Report == nil {
inst.Logf(2, "program did not crash")
} else {
if err := inst.reporter.Symbolize(result.Report); err != nil {
return nil, fmt.Errorf("failed to symbolize report: %v", err)
}
inst.Logf(2, "program crashed: %v", result.Report.Title)
}
return result, nil
}
func (inst *ExecProgInstance) runBinary(bin string, duration time.Duration) (*RunResult, error) {
bin, err := inst.VMInstance.Copy(bin)
if err != nil {
return nil, &TestError{Title: fmt.Sprintf("failed to copy binary to VM: %v", err)}
}
return inst.runCommand(bin, duration)
}
func (inst *ExecProgInstance) RunCProg(p *prog.Prog, duration time.Duration,
opts csource.Options) (*RunResult, error) {
src, err := csource.Write(p, opts)
if err != nil {
return nil, err
}
inst.Logf(2, "testing compiled C program (duration=%v, %+v): %s", duration, opts, p)
return inst.RunCProgRaw(src, p.Target, duration)
}
func (inst *ExecProgInstance) RunCProgRaw(src []byte, target *prog.Target,
duration time.Duration) (*RunResult, error) {
bin, err := csource.BuildNoWarn(target, src)
if err != nil {
return nil, err
}
defer os.Remove(bin)
return inst.runBinary(bin, duration)
}
func (inst *ExecProgInstance) RunSyzProgFile(progFile string, duration time.Duration,
opts csource.Options) (*RunResult, error) {
vmProgFile, err := inst.VMInstance.Copy(progFile)
if err != nil {
return nil, &TestError{Title: fmt.Sprintf("failed to copy prog to VM: %v", err)}
}
target := inst.mgrCfg.SysTarget
faultCall := -1
if opts.Fault {
faultCall = opts.FaultCall
}
command := ExecprogCmd(inst.execprogBin, inst.executorBin, target.OS, target.Arch, opts.Sandbox,
opts.Repeat, opts.Threaded, opts.Collide, opts.Procs, faultCall, opts.FaultNth,
!inst.OldFlagsCompatMode, inst.mgrCfg.Timeouts.Slowdown, vmProgFile)
return inst.runCommand(command, duration)
}
func (inst *ExecProgInstance) RunSyzProg(syzProg []byte, duration time.Duration,
opts csource.Options) (*RunResult, error) {
progFile, err := osutil.WriteTempFile(syzProg)
if err != nil {
return nil, err
}
defer os.Remove(progFile)
return inst.RunSyzProgFile(progFile, duration, opts)
}
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