diff options
Diffstat (limited to 'internal/lsp/debug/trace.go')
| -rw-r--r-- | internal/lsp/debug/trace.go | 226 |
1 files changed, 0 insertions, 226 deletions
diff --git a/internal/lsp/debug/trace.go b/internal/lsp/debug/trace.go deleted file mode 100644 index ca612867a..000000000 --- a/internal/lsp/debug/trace.go +++ /dev/null @@ -1,226 +0,0 @@ -// Copyright 2019 The Go Authors. All rights reserved. -// Use of this source code is governed by a BSD-style -// license that can be found in the LICENSE file. - -package debug - -import ( - "bytes" - "context" - "fmt" - "html/template" - "net/http" - "runtime/trace" - "sort" - "strings" - "sync" - "time" - - "golang.org/x/tools/internal/event" - "golang.org/x/tools/internal/event/core" - "golang.org/x/tools/internal/event/export" - "golang.org/x/tools/internal/event/label" -) - -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}} - <H2>{{.Selected.Name}}</H2> - {{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}} - {{end}} -{{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}} -{{end}} -`)) - -type traces struct { - mu sync.Mutex - sets map[string]*traceSet - unfinished map[export.SpanContext]*traceData -} - -type TraceResults struct { // exported for testing - Traces []*traceSet - Selected *traceSet -} - -type traceSet struct { - Name string - Last *traceData - Longest *traceData -} - -type traceData struct { - TraceID export.TraceID - SpanID export.SpanID - ParentID export.SpanID - Name string - Start time.Time - Finish time.Time - Offset time.Duration - Duration time.Duration - Tags string - Events []traceEvent - Children []*traceData -} - -type traceEvent struct { - Time time.Time - Offset time.Duration - Tags string -} - -func StdTrace(exporter event.Exporter) event.Exporter { - return func(ctx context.Context, ev core.Event, lm label.Map) context.Context { - span := export.GetSpan(ctx) - if span == nil { - return exporter(ctx, ev, lm) - } - switch { - case event.IsStart(ev): - if span.ParentID.IsValid() { - region := trace.StartRegion(ctx, span.Name) - ctx = context.WithValue(ctx, traceKey, region) - } else { - var task *trace.Task - ctx, task = trace.NewTask(ctx, span.Name) - ctx = context.WithValue(ctx, traceKey, task) - } - // Log the start event as it may contain useful labels. - msg := formatEvent(ctx, ev, lm) - trace.Log(ctx, "start", msg) - case event.IsLog(ev): - category := "" - if event.IsError(ev) { - category = "error" - } - msg := formatEvent(ctx, ev, lm) - trace.Log(ctx, category, msg) - case event.IsEnd(ev): - if v := ctx.Value(traceKey); v != nil { - v.(interface{ End() }).End() - } - } - return exporter(ctx, ev, lm) - } -} - -func formatEvent(ctx context.Context, ev core.Event, lm label.Map) string { - buf := &bytes.Buffer{} - p := export.Printer{} - p.WriteEvent(buf, ev, lm) - return buf.String() -} - -func (t *traces) ProcessEvent(ctx context.Context, ev core.Event, lm label.Map) context.Context { - t.mu.Lock() - defer t.mu.Unlock() - span := export.GetSpan(ctx) - if span == nil { - return ctx - } - - switch { - case event.IsStart(ev): - if t.sets == nil { - t.sets = make(map[string]*traceSet) - t.unfinished = make(map[export.SpanContext]*traceData) - } - // just starting, add it to the unfinished map - td := &traceData{ - TraceID: span.ID.TraceID, - SpanID: span.ID.SpanID, - ParentID: span.ParentID, - Name: span.Name, - Start: span.Start().At(), - Tags: renderLabels(span.Start()), - } - t.unfinished[span.ID] = td - // and wire up parents if we have them - if !span.ParentID.IsValid() { - return ctx - } - parentID := export.SpanContext{TraceID: span.ID.TraceID, SpanID: span.ParentID} - parent, found := t.unfinished[parentID] - if !found { - // trace had an invalid parent, so it cannot itself be valid - return ctx - } - parent.Children = append(parent.Children, td) - - case event.IsEnd(ev): - // finishing, must be already in the map - td, found := t.unfinished[span.ID] - if !found { - return ctx // if this happens we are in a bad place - } - delete(t.unfinished, span.ID) - - td.Finish = span.Finish().At() - td.Duration = span.Finish().At().Sub(span.Start().At()) - events := span.Events() - td.Events = make([]traceEvent, len(events)) - for i, event := range events { - td.Events[i] = traceEvent{ - Time: event.At(), - Tags: renderLabels(event), - } - } - - set, ok := t.sets[span.Name] - if !ok { - set = &traceSet{Name: span.Name} - t.sets[span.Name] = set - } - set.Last = td - if set.Longest == nil || set.Last.Duration > set.Longest.Duration { - set.Longest = set.Last - } - if !td.ParentID.IsValid() { - fillOffsets(td, td.Start) - } - } - return ctx -} - -func (t *traces) getData(req *http.Request) interface{} { - if len(t.sets) == 0 { - return nil - } - data := TraceResults{} - data.Traces = make([]*traceSet, 0, len(t.sets)) - for _, set := range t.sets { - data.Traces = append(data.Traces, set) - } - sort.Slice(data.Traces, func(i, j int) bool { return data.Traces[i].Name < data.Traces[j].Name }) - if bits := strings.SplitN(req.URL.Path, "/trace/", 2); len(bits) > 1 { - data.Selected = t.sets[bits[1]] - } - return data -} - -func fillOffsets(td *traceData, start time.Time) { - td.Offset = td.Start.Sub(start) - for i := range td.Events { - td.Events[i].Offset = td.Events[i].Time.Sub(start) - } - for _, child := range td.Children { - fillOffsets(child, start) - } -} - -func renderLabels(labels label.List) string { - buf := &bytes.Buffer{} - for index := 0; labels.Valid(index); index++ { - if l := labels.Label(index); l.Valid() { - fmt.Fprintf(buf, "%v ", l) - } - } - return buf.String() -} |