Package debug exports debug information for gopls.



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    const (
    	PlainText = PrintMode(iota)
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    const Version = "master"

      Version is a manually-updated mechanism for tracking versions.


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      var BaseTemplate = template.Must(template.New("").Parse(`
      <title>{{template "title" .}}</title>
      td.value {
        text-align: right;
      } {
      	list-style-type: none;
      {{block "head" .}}{{end}}
      <a href="/">Main</a>
      <a href="/info">Info</a>
      <a href="/memory">Memory</a>
      <a href="/metrics">Metrics</a>
      <a href="/rpc">RPC</a>
      <a href="/trace">Trace</a>
      <h1>{{template "title" .}}</h1>
      {{block "body" .}}
      Unknown page
      {{define "cachelink"}}<a href="/cache/{{.}}">Cache {{.}}</a>{{end}}
      {{define "clientlink"}}<a href="/client/{{.}}">Client {{.}}</a>{{end}}
      {{define "serverlink"}}<a href="/server/{{.}}">Server {{.}}</a>{{end}}
      {{define "sessionlink"}}<a href="/session/{{.}}">Session {{.}}</a>{{end}}
      {{define "viewlink"}}<a href="/view/{{.}}">View {{.}}</a>{{end}}
      {{define "filelink"}}<a href="/file/{{.Session}}/{{.FileIdentity.Hash}}">{{.FileIdentity.URI}}</a>{{end}}
      	"fuint64":  fuint64,
      	"fuint32":  fuint32,
      	"fcontent": fcontent,
      	"localAddress": func(s string) string {
      		host, port, err := net.SplitHostPort(s)
      		if err != nil {
      			return s
      		ip := net.ParseIP(host)
      		if ip == nil {
      			return s
      		if ip.IsLoopback() || ip.IsUnspecified() {
      			return "localhost:" + port
      		return s
      	"options": func(s *cache.Session) []string {
      		return showOptions(s.Options())
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      var CacheTmpl = template.Must(template.Must(BaseTemplate.Clone()).Parse(`
      {{define "title"}}Cache {{.ID}}{{end}}
      {{define "body"}}
      <h2>memoize.Store entries</h2>
      <ul>{{range $k,$v := .MemStats}}<li>{{$k}} - {{$v}}</li>{{end}}</ul>
      <h2>Per-package usage - not accurate, for guidance only</h2>
      {{.PackageStats true}}
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      var ClientTmpl = template.Must(template.Must(BaseTemplate.Clone()).Parse(`
      {{define "title"}}Client {{.Session.ID}}{{end}}
      {{define "body"}}
      Using session: <b>{{template "sessionlink" .Session.ID}}</b><br>
      {{if .DebugAddress}}Debug this client at: <a href="http://{{localAddress .DebugAddress}}">{{localAddress .DebugAddress}}</a><br>{{end}}
      Logfile: {{.Logfile}}<br>
      Gopls Path: {{.GoplsPath}}<br>
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      var DebugTmpl = template.Must(template.Must(BaseTemplate.Clone()).Parse(`
      {{define "title"}}GoPls Debug pages{{end}}
      {{define "body"}}
      <a href="/debug/pprof">Profiling</a>
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      var FileTmpl = template.Must(template.Must(BaseTemplate.Clone()).Parse(`
      {{define "title"}}Overlay {{.FileIdentity.Hash}}{{end}}
      {{define "body"}}
      {{with .}}
      	From: <b>{{template "sessionlink" .Session}}</b><br>
      	URI: <b>{{.URI}}</b><br>
      	Identifier: <b>{{.FileIdentity.Hash}}</b><br>
      	Version: <b>{{.Version}}</b><br>
      	Kind: <b>{{.Kind}}</b><br>
      <pre>{{fcontent .Read}}</pre>
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      var InfoTmpl = template.Must(template.Must(BaseTemplate.Clone()).Parse(`
      {{define "title"}}GoPls version information{{end}}
      {{define "body"}}
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      var MainTmpl = template.Must(template.Must(BaseTemplate.Clone()).Parse(`
      {{define "title"}}GoPls server information{{end}}
      {{define "body"}}
      <ul>{{range .State.Caches}}<li>{{template "cachelink" .ID}}</li>{{end}}</ul>
      <ul>{{range .State.Sessions}}<li>{{template "sessionlink" .ID}} from {{template "cachelink" .Cache.ID}}</li>{{end}}</ul>
      <ul>{{range .State.Views}}<li>{{.Name}} is {{template "viewlink" .ID}} from {{template "sessionlink" .Session.ID}} in {{.Folder}}</li>{{end}}</ul>
      <ul>{{range .State.Clients}}<li>{{template "clientlink" .Session.ID}}</li>{{end}}</ul>
      <ul>{{range .State.Servers}}<li>{{template "serverlink" .ID}}</li>{{end}}</ul>
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      var MemoryTmpl = template.Must(template.Must(BaseTemplate.Clone()).Parse(`
      {{define "title"}}GoPls memory usage{{end}}
      {{define "head"}}<meta http-equiv="refresh" content="5">{{end}}
      {{define "body"}}
      <tr><td class="label">Allocated bytes</td><td class="value">{{fuint64 .HeapAlloc}}</td></tr>
      <tr><td class="label">Total allocated bytes</td><td class="value">{{fuint64 .TotalAlloc}}</td></tr>
      <tr><td class="label">System bytes</td><td class="value">{{fuint64 .Sys}}</td></tr>
      <tr><td class="label">Heap system bytes</td><td class="value">{{fuint64 .HeapSys}}</td></tr>
      <tr><td class="label">Malloc calls</td><td class="value">{{fuint64 .Mallocs}}</td></tr>
      <tr><td class="label">Frees</td><td class="value">{{fuint64 .Frees}}</td></tr>
      <tr><td class="label">Idle heap bytes</td><td class="value">{{fuint64 .HeapIdle}}</td></tr>
      <tr><td class="label">In use bytes</td><td class="value">{{fuint64 .HeapInuse}}</td></tr>
      <tr><td class="label">Released to system bytes</td><td class="value">{{fuint64 .HeapReleased}}</td></tr>
      <tr><td class="label">Heap object count</td><td class="value">{{fuint64 .HeapObjects}}</td></tr>
      <tr><td class="label">Stack in use bytes</td><td class="value">{{fuint64 .StackInuse}}</td></tr>
      <tr><td class="label">Stack from system bytes</td><td class="value">{{fuint64 .StackSys}}</td></tr>
      <tr><td class="label">Bucket hash bytes</td><td class="value">{{fuint64 .BuckHashSys}}</td></tr>
      <tr><td class="label">GC metadata bytes</td><td class="value">{{fuint64 .GCSys}}</td></tr>
      <tr><td class="label">Off heap bytes</td><td class="value">{{fuint64 .OtherSys}}</td></tr>
      <h2>By size</h2>
      {{range .BySize}}<tr><td class="value">{{fuint32 .Size}}</td><td class="value">{{fuint64 .Mallocs}}</td><td class="value">{{fuint64 .Frees}}</td></tr>{{end}}
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      var RPCTmpl = template.Must(template.Must(BaseTemplate.Clone()).Parse(`
      {{define "title"}}RPC Information{{end}}
      {{define "body"}}
      	{{template "rpcSection" .Inbound}}
      	{{template "rpcSection" .Outbound}}
      {{define "rpcSection"}}
      	{{range .}}<P>
      		<b>{{.Method}}</b> {{.Started}} <a href="/trace/{{.Method}}">traces</a> ({{.InProgress}} in progress)
      		<i>Latency</i> {{with .Latency}}{{.Mean}} ({{.Min}}<{{.Max}}){{end}}
      		<i>By bucket</i> 0s {{range .Latency.Values}}{{if gt .Count 0}}<b>{{.Count}}</b> {{.Limit}} {{end}}{{end}}
      		<i>Received</i> {{.Received}} (avg. {{.ReceivedMean}})
      		<i>Sent</i> {{.Sent}} (avg. {{.SentMean}})
      		<i>Result codes</i> {{range .Codes}}{{.Key}}={{.Count}} {{end}}
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      var ServerTmpl = template.Must(template.Must(BaseTemplate.Clone()).Parse(`
      {{define "title"}}Server {{.ID}}{{end}}
      {{define "body"}}
      {{if .DebugAddress}}Debug this server at: <a href="http://{{localAddress .DebugAddress}}">{{localAddress .DebugAddress}}</a><br>{{end}}
      Logfile: {{.Logfile}}<br>
      Gopls Path: {{.GoplsPath}}<br>
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      var SessionTmpl = template.Must(template.Must(BaseTemplate.Clone()).Parse(`
      {{define "title"}}Session {{.ID}}{{end}}
      {{define "body"}}
      From: <b>{{template "cachelink" .Cache.ID}}</b><br>
      <ul>{{range .Views}}<li>{{.Name}} is {{template "viewlink" .ID}} in {{.Folder}}</li>{{end}}</ul>
      <ul>{{range .Overlays}}<li>{{template "filelink" .}}</li>{{end}}</ul>
      {{range options .}}<p>{{.}}{{end}}
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      var TraceTmpl = template.Must(template.Must(BaseTemplate.Clone()).Parse(`
      {{define "title"}}Trace Information{{end}}
      {{define "body"}}
      	{{range .Traces}}<a href="/trace/{{.Name}}">{{.Name}}</a> last: {{.Last.Duration}}, longest: {{.Longest.Duration}}<br>{{end}}
      	{{if .Selected}}
      		{{if .Selected.Last}}<H3>Last</H3><ul>{{template "details" .Selected.Last}}</ul>{{end}}
      		{{if .Selected.Longest}}<H3>Longest</H3><ul>{{template "details" .Selected.Longest}}</ul>{{end}}
      {{define "details"}}
      	<li>{{.Offset}} {{.Name}} {{.Duration}} {{.Tags}}</li>
      	{{if .Events}}<ul class=events>{{range .Events}}<li>{{.Offset}} {{.Tags}}</li>{{end}}</ul>{{end}}
      	{{if .Children}}<ul>{{range .Children}}{{template "details" .}}{{end}}</ul>{{end}}
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      var ViewTmpl = template.Must(template.Must(BaseTemplate.Clone()).Parse(`
      {{define "title"}}View {{.ID}}{{end}}
      {{define "body"}}
      Name: <b>{{.Name}}</b><br>
      Folder: <b>{{.Folder}}</b><br>
      From: <b>{{template "sessionlink" .Session.ID}}</b><br>
      <ul>{{range .Options.Env}}<li>{{.}}</li>{{end}}</ul>


      func PrintVersionInfo

      func PrintVersionInfo(ctx context.Context, w io.Writer, verbose bool, mode PrintMode)

        PrintVersionInfo writes version information to w, using the output format specified by mode. verbose controls whether additional information is written, including section headers.

        func StdTrace

        func StdTrace(exporter event.Exporter) event.Exporter

        func WithInstance

        func WithInstance(ctx context.Context, workdir, agent string) context.Context

          WithInstance creates debug instance ready for use using the supplied configuration and stores it in the returned context.


          type Client

          type Client struct {
          	Session      *cache.Session
          	DebugAddress string
          	Logfile      string
          	GoplsPath    string
          	ServerID     string

            A Client is an incoming connection from a remote client.

            type Instance

            type Instance struct {
            	Logfile              string
            	StartTime            time.Time
            	ServerAddress        string
            	DebugAddress         string
            	ListenedDebugAddress string
            	Workdir              string
            	OCAgentConfig        string
            	LogWriter io.Writer
            	State *State
            	// contains filtered or unexported fields

              An Instance holds all debug information associated with a gopls instance.

              func GetInstance

              func GetInstance(ctx context.Context) *Instance

              func (*Instance) MonitorMemory

              func (i *Instance) MonitorMemory(ctx context.Context)

                MonitorMemory starts recording memory statistics each second.

                func (*Instance) PrintServerInfo

                func (i *Instance) PrintServerInfo(ctx context.Context, w io.Writer)

                  PrintServerInfo writes HTML debug info to w for the Instance.

                  func (*Instance) Serve

                  func (i *Instance) Serve(ctx context.Context) error

                    Serve starts and runs a debug server in the background. It also logs the port the server starts on, to allow for :0 auto assigned ports.

                    func (*Instance) SetLogFile

                    func (i *Instance) SetLogFile(logfile string, isDaemon bool) (func(), error)

                      SetLogFile sets the logfile for use with this instance.

                      type Module

                      type Module struct {
                      	Replace *ModuleVersion `json:"replace,omitempty"`

                      type ModuleVersion

                      type ModuleVersion struct {
                      	Path    string `json:"path,omitempty"`
                      	Version string `json:"version,omitempty"`
                      	Sum     string `json:"sum,omitempty"`

                      type PrintMode

                      type PrintMode int

                      type Rpcs

                      type Rpcs struct {
                      	Inbound  []*rpcStats // stats for incoming lsp rpcs sorted by method name
                      	Outbound []*rpcStats // stats for outgoing lsp rpcs sorted by method name
                      	// contains filtered or unexported fields

                      func (*Rpcs) ProcessEvent

                      func (r *Rpcs) ProcessEvent(ctx context.Context, ev core.Event, lm label.Map) context.Context

                      type Server

                      type Server struct {
                      	ID           string
                      	DebugAddress string
                      	Logfile      string
                      	GoplsPath    string
                      	ClientID     string

                        A Server is an outgoing connection to a remote LSP server.

                        type ServerVersion

                        type ServerVersion struct {
                        	Deps []*Module `json:"deps,omitempty"`

                          ServerVersion is the format used by gopls to report its version to the client. This format is structured so that the client can parse it easily.

                          func VersionInfo

                          func VersionInfo() *ServerVersion

                            VersionInfo returns the build info for the gopls process. If it was not built in module mode, we return a GOPATH-specific message with the hardcoded version.

                            type State

                            type State struct {
                            	// contains filtered or unexported fields

                              State holds debugging information related to the server state.

                              func (*State) Cache

                              func (st *State) Cache(id string) *cache.Cache

                                Cache returns the Cache that matches the supplied id.

                                func (*State) Caches

                                func (st *State) Caches() []*cache.Cache

                                  Caches returns the set of Cache objects currently being served.

                                  func (*State) Client

                                  func (st *State) Client(id string) *Client

                                    Client returns the Client matching the supplied id.

                                    func (*State) Clients

                                    func (st *State) Clients() []*Client

                                      Clients returns the set of Clients currently being served.

                                      func (*State) Servers

                                      func (st *State) Servers() []*Server

                                        Servers returns the set of Servers the instance is currently connected to.

                                        func (*State) Session

                                        func (st *State) Session(id string) *cache.Session

                                          Session returns the Session that matches the supplied id.

                                          func (*State) Sessions

                                          func (st *State) Sessions() []*cache.Session

                                            Sessions returns the set of Session objects currently being served.

                                            func (*State) View

                                            func (st *State) View(id string) *cache.View

                                              View returns the View that matches the supplied id.

                                              func (*State) Views

                                              func (st *State) Views() []*cache.View

                                                Views returns the set of View objects currently being served.

                                                type TraceResults

                                                type TraceResults struct {
                                                	Traces   []*traceSet
                                                	Selected *traceSet


                                                Path Synopsis
                                                Package log provides helper methods for exporting log events to the internal/event package.
                                                Package log provides helper methods for exporting log events to the internal/event package.
                                                Package tag provides the labels used for telemetry throughout gopls.
                                                Package tag provides the labels used for telemetry throughout gopls.