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profiler.go
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profiler.go
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package protocol
import (
"encoding/json"
"github.com/yijinliu/algo-lib/go/src/logging"
hc "github.com/yijinliu/headless-chromium/go"
"sync"
)
// Profile node. Holds callsite information, execution statistics and child nodes.
type ProfileNode struct {
Id int `json:"id"` // Unique id of the node.
CallFrame *RuntimeCallFrame `json:"callFrame"` // Function location.
HitCount int `json:"hitCount,omitempty"` // Number of samples where this node was on top of the call stack.
Children []int `json:"children,omitempty"` // Child node ids.
DeoptReason string `json:"deoptReason,omitempty"` // The reason of being not optimized. The function may be deoptimized or marked as don't optimize.
PositionTicks []*PositionTickInfo `json:"positionTicks,omitempty"` // An array of source position ticks.
}
// Profile.
type Profile struct {
Nodes []*ProfileNode `json:"nodes"` // The list of profile nodes. First item is the root node.
StartTime float64 `json:"startTime"` // Profiling start timestamp in microseconds.
EndTime float64 `json:"endTime"` // Profiling end timestamp in microseconds.
Samples []int `json:"samples,omitempty"` // Ids of samples top nodes.
TimeDeltas []int `json:"timeDeltas,omitempty"` // Time intervals between adjacent samples in microseconds. The first delta is relative to the profile startTime.
}
// Specifies a number of samples attributed to a certain source position.
// @experimental
type PositionTickInfo struct {
Line int `json:"line"` // Source line number (1-based).
Ticks int `json:"ticks"` // Number of samples attributed to the source line.
}
type ProfilerEnableCommand struct {
wg sync.WaitGroup
err error
}
func NewProfilerEnableCommand() *ProfilerEnableCommand {
return &ProfilerEnableCommand{}
}
func (cmd *ProfilerEnableCommand) Name() string {
return "Profiler.enable"
}
func (cmd *ProfilerEnableCommand) Params() interface{} {
return nil
}
func (cmd *ProfilerEnableCommand) Run(conn *hc.Conn) error {
cmd.wg.Add(1)
conn.SendCommand(cmd)
cmd.wg.Wait()
return cmd.err
}
func ProfilerEnable(conn *hc.Conn) (err error) {
cmd := NewProfilerEnableCommand()
cmd.Run(conn)
return cmd.err
}
type ProfilerEnableCB func(err error)
type AsyncProfilerEnableCommand struct {
cb ProfilerEnableCB
}
func NewAsyncProfilerEnableCommand(cb ProfilerEnableCB) *AsyncProfilerEnableCommand {
return &AsyncProfilerEnableCommand{
cb: cb,
}
}
func (cmd *AsyncProfilerEnableCommand) Name() string {
return "Profiler.enable"
}
func (cmd *AsyncProfilerEnableCommand) Params() interface{} {
return nil
}
func (cmd *ProfilerEnableCommand) Done(data []byte, err error) {
cmd.err = err
cmd.wg.Done()
}
func (cmd *AsyncProfilerEnableCommand) Done(data []byte, err error) {
cmd.cb(err)
}
type ProfilerDisableCommand struct {
wg sync.WaitGroup
err error
}
func NewProfilerDisableCommand() *ProfilerDisableCommand {
return &ProfilerDisableCommand{}
}
func (cmd *ProfilerDisableCommand) Name() string {
return "Profiler.disable"
}
func (cmd *ProfilerDisableCommand) Params() interface{} {
return nil
}
func (cmd *ProfilerDisableCommand) Run(conn *hc.Conn) error {
cmd.wg.Add(1)
conn.SendCommand(cmd)
cmd.wg.Wait()
return cmd.err
}
func ProfilerDisable(conn *hc.Conn) (err error) {
cmd := NewProfilerDisableCommand()
cmd.Run(conn)
return cmd.err
}
type ProfilerDisableCB func(err error)
type AsyncProfilerDisableCommand struct {
cb ProfilerDisableCB
}
func NewAsyncProfilerDisableCommand(cb ProfilerDisableCB) *AsyncProfilerDisableCommand {
return &AsyncProfilerDisableCommand{
cb: cb,
}
}
func (cmd *AsyncProfilerDisableCommand) Name() string {
return "Profiler.disable"
}
func (cmd *AsyncProfilerDisableCommand) Params() interface{} {
return nil
}
func (cmd *ProfilerDisableCommand) Done(data []byte, err error) {
cmd.err = err
cmd.wg.Done()
}
func (cmd *AsyncProfilerDisableCommand) Done(data []byte, err error) {
cmd.cb(err)
}
type SetSamplingIntervalParams struct {
Interval int `json:"interval"` // New sampling interval in microseconds.
}
// Changes CPU profiler sampling interval. Must be called before CPU profiles recording started.
type SetSamplingIntervalCommand struct {
params *SetSamplingIntervalParams
wg sync.WaitGroup
err error
}
func NewSetSamplingIntervalCommand(params *SetSamplingIntervalParams) *SetSamplingIntervalCommand {
return &SetSamplingIntervalCommand{
params: params,
}
}
func (cmd *SetSamplingIntervalCommand) Name() string {
return "Profiler.setSamplingInterval"
}
func (cmd *SetSamplingIntervalCommand) Params() interface{} {
return cmd.params
}
func (cmd *SetSamplingIntervalCommand) Run(conn *hc.Conn) error {
cmd.wg.Add(1)
conn.SendCommand(cmd)
cmd.wg.Wait()
return cmd.err
}
func SetSamplingInterval(params *SetSamplingIntervalParams, conn *hc.Conn) (err error) {
cmd := NewSetSamplingIntervalCommand(params)
cmd.Run(conn)
return cmd.err
}
type SetSamplingIntervalCB func(err error)
// Changes CPU profiler sampling interval. Must be called before CPU profiles recording started.
type AsyncSetSamplingIntervalCommand struct {
params *SetSamplingIntervalParams
cb SetSamplingIntervalCB
}
func NewAsyncSetSamplingIntervalCommand(params *SetSamplingIntervalParams, cb SetSamplingIntervalCB) *AsyncSetSamplingIntervalCommand {
return &AsyncSetSamplingIntervalCommand{
params: params,
cb: cb,
}
}
func (cmd *AsyncSetSamplingIntervalCommand) Name() string {
return "Profiler.setSamplingInterval"
}
func (cmd *AsyncSetSamplingIntervalCommand) Params() interface{} {
return cmd.params
}
func (cmd *SetSamplingIntervalCommand) Done(data []byte, err error) {
cmd.err = err
cmd.wg.Done()
}
func (cmd *AsyncSetSamplingIntervalCommand) Done(data []byte, err error) {
cmd.cb(err)
}
type ProfilerStartCommand struct {
wg sync.WaitGroup
err error
}
func NewProfilerStartCommand() *ProfilerStartCommand {
return &ProfilerStartCommand{}
}
func (cmd *ProfilerStartCommand) Name() string {
return "Profiler.start"
}
func (cmd *ProfilerStartCommand) Params() interface{} {
return nil
}
func (cmd *ProfilerStartCommand) Run(conn *hc.Conn) error {
cmd.wg.Add(1)
conn.SendCommand(cmd)
cmd.wg.Wait()
return cmd.err
}
func ProfilerStart(conn *hc.Conn) (err error) {
cmd := NewProfilerStartCommand()
cmd.Run(conn)
return cmd.err
}
type ProfilerStartCB func(err error)
type AsyncProfilerStartCommand struct {
cb ProfilerStartCB
}
func NewAsyncProfilerStartCommand(cb ProfilerStartCB) *AsyncProfilerStartCommand {
return &AsyncProfilerStartCommand{
cb: cb,
}
}
func (cmd *AsyncProfilerStartCommand) Name() string {
return "Profiler.start"
}
func (cmd *AsyncProfilerStartCommand) Params() interface{} {
return nil
}
func (cmd *ProfilerStartCommand) Done(data []byte, err error) {
cmd.err = err
cmd.wg.Done()
}
func (cmd *AsyncProfilerStartCommand) Done(data []byte, err error) {
cmd.cb(err)
}
type StopResult struct {
Profile *Profile `json:"profile"` // Recorded profile.
}
type StopCommand struct {
result StopResult
wg sync.WaitGroup
err error
}
func NewStopCommand() *StopCommand {
return &StopCommand{}
}
func (cmd *StopCommand) Name() string {
return "Profiler.stop"
}
func (cmd *StopCommand) Params() interface{} {
return nil
}
func (cmd *StopCommand) Run(conn *hc.Conn) error {
cmd.wg.Add(1)
conn.SendCommand(cmd)
cmd.wg.Wait()
return cmd.err
}
func Stop(conn *hc.Conn) (result *StopResult, err error) {
cmd := NewStopCommand()
cmd.Run(conn)
return &cmd.result, cmd.err
}
type StopCB func(result *StopResult, err error)
type AsyncStopCommand struct {
cb StopCB
}
func NewAsyncStopCommand(cb StopCB) *AsyncStopCommand {
return &AsyncStopCommand{
cb: cb,
}
}
func (cmd *AsyncStopCommand) Name() string {
return "Profiler.stop"
}
func (cmd *AsyncStopCommand) Params() interface{} {
return nil
}
func (cmd *StopCommand) Result() *StopResult {
return &cmd.result
}
func (cmd *StopCommand) Done(data []byte, err error) {
if err == nil {
err = json.Unmarshal(data, &cmd.result)
}
cmd.err = err
cmd.wg.Done()
}
func (cmd *AsyncStopCommand) Done(data []byte, err error) {
var result StopResult
if err == nil {
err = json.Unmarshal(data, &result)
}
if cmd.cb == nil {
logging.Vlog(-1, err)
} else if err != nil {
cmd.cb(nil, err)
} else {
cmd.cb(&result, nil)
}
}
// Sent when new profile recodring is started using console.profile() call.
type ConsoleProfileStartedEvent struct {
Id string `json:"id"`
Location *Location `json:"location"` // Location of console.profile().
Title string `json:"title"` // Profile title passed as an argument to console.profile().
}
func OnConsoleProfileStarted(conn *hc.Conn, cb func(evt *ConsoleProfileStartedEvent)) {
sink := hc.FuncToEventSink(func(name string, params []byte) {
evt := &ConsoleProfileStartedEvent{}
if err := json.Unmarshal(params, evt); err != nil {
logging.Vlog(-1, err)
} else {
cb(evt)
}
})
conn.AddEventSink("Profiler.consoleProfileStarted", sink)
}
type ConsoleProfileFinishedEvent struct {
Id string `json:"id"`
Location *Location `json:"location"` // Location of console.profileEnd().
Profile *Profile `json:"profile"`
Title string `json:"title"` // Profile title passed as an argument to console.profile().
}
func OnConsoleProfileFinished(conn *hc.Conn, cb func(evt *ConsoleProfileFinishedEvent)) {
sink := hc.FuncToEventSink(func(name string, params []byte) {
evt := &ConsoleProfileFinishedEvent{}
if err := json.Unmarshal(params, evt); err != nil {
logging.Vlog(-1, err)
} else {
cb(evt)
}
})
conn.AddEventSink("Profiler.consoleProfileFinished", sink)
}