vm

Documentation

Overview

Package vm provides an abstract test machine (VM, physical machine, etc) interface for the rest of the system. For convenience test machines are subsequently collectively called VMs. Package wraps vmimpl package interface with some common functionality and higher-level interface.

Index

• Constants
• Variables
• func AllowsOvercommit(typ string) bool
• type BootErrorer
• type ExitCondition
• type Instance
  • func (inst *Instance) Close()
  • func (inst *Instance) Copy(hostSrc string) (string, error)
  • func (inst *Instance) Diagnose() ([]byte, bool)
  • func (inst *Instance) Forward(port int) (string, error)
  • func (inst *Instance) MonitorExecution(outc <-chan []byte, errc <-chan error, reporter report.Reporter, ...) (rep *report.Report)
  • func (inst *Instance) Run(timeout time.Duration, stop <-chan bool, command string) (outc <-chan []byte, errc <-chan error, err error)
• type Pool
  • func Create(cfg *mgrconfig.Config, debug bool) (*Pool, error)
  • func (pool *Pool) Count() int
  • func (pool *Pool) Create(index int) (*Instance, error)

Constants

const (
	// The program is allowed to exit after timeout.
	ExitTimeout = ExitCondition(1 << iota)
	// The program is allowed to exit with no errors.
	ExitNormal
	// The program is allowed to exit with errors.
	ExitError
)

Variables

var (
	Shutdown   = vmimpl.Shutdown
	ErrTimeout = vmimpl.ErrTimeout
)

var (
	NoOutputTimeout = 5 * time.Minute
)

Functions

func AllowsOvercommit

func AllowsOvercommit(typ string) bool

AllowsOvercommit returns if the instance type allows overcommit of instances (i.e. creation of instances out-of-thin-air). Overcommit is used during image and patch testing in syz-ci when it just asks for more than specified in config instances. Generally virtual machines (qemu, gce) support overcommit, while physical machines (adb, isolated) do not. Strictly speaking, we should never use overcommit and use only what's specified in config, because we override resource limits specified in config (e.g. can OOM). But it works and makes lots of things much simpler.

Types

type BootErrorer

type BootErrorer interface {
	BootError() (string, []byte)
}

type ExitCondition

type ExitCondition int

type Instance

type Instance struct {
	// contains filtered or unexported fields
}

func (*Instance) Close

func (inst *Instance) Close()

func (*Instance) Copy

func (inst *Instance) Copy(hostSrc string) (string, error)

func (*Instance) Diagnose

func (inst *Instance) Diagnose() ([]byte, bool)

func (*Instance) Forward

func (inst *Instance) Forward(port int) (string, error)

func (*Instance) MonitorExecution

func (inst *Instance) MonitorExecution(outc <-chan []byte, errc <-chan error,
	reporter report.Reporter, exit ExitCondition) (rep *report.Report)

MonitorExecution monitors execution of a program running inside of a VM. It detects kernel oopses in output, lost connections, hangs, etc. outc/errc is what vm.Instance.Run returns, reporter parses kernel output for oopses. Exit says which exit modes should be considered as errors/OK. Returns a non-symbolized crash report, or nil if no error happens.

func (*Instance) Run

func (inst *Instance) Run(timeout time.Duration, stop <-chan bool, command string) (
	outc <-chan []byte, errc <-chan error, err error)

type Pool

type Pool struct {
	// contains filtered or unexported fields
}

func Create

func Create(cfg *mgrconfig.Config, debug bool) (*Pool, error)

Create creates a VM pool that can be used to create individual VMs.

func (*Pool) Count

func (pool *Pool) Count() int

func (*Pool) Create

func (pool *Pool) Create(index int) (*Instance, error)