1 files changed, 38 insertions, 0 deletions
diff --git a/src/cmd/internal/traceviewer/format.go b/src/cmd/internal/traceviewer/format.go
new file mode 100644
index 0000000..3636c10
--- /dev/null
+++ b/src/cmd/internal/traceviewer/format.go
@@ -0,0 +1,38 @@
+// Copyright 2020 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 traceviewer provides definitions of the JSON data structures
+// used by the Chrome trace viewer.
+//
+// The official description of the format is in this file:
+// https://docs.google.com/document/d/1CvAClvFfyA5R-PhYUmn5OOQtYMH4h6I0nSsKchNAySU/preview
+package traceviewer
+
+type Data struct {
+	Events   []*Event         `json:"traceEvents"`
+	Frames   map[string]Frame `json:"stackFrames"`
+	TimeUnit string           `json:"displayTimeUnit"`
+}
+
+type Event struct {
+	Name      string  `json:"name,omitempty"`
+	Phase     string  `json:"ph"`
+	Scope     string  `json:"s,omitempty"`
+	Time      float64 `json:"ts"`
+	Dur       float64 `json:"dur,omitempty"`
+	PID       uint64  `json:"pid"`
+	TID       uint64  `json:"tid"`
+	ID        uint64  `json:"id,omitempty"`
+	BindPoint string  `json:"bp,omitempty"`
+	Stack     int     `json:"sf,omitempty"`
+	EndStack  int     `json:"esf,omitempty"`
+	Arg       any     `json:"args,omitempty"`
+	Cname     string  `json:"cname,omitempty"`
+	Category  string  `json:"cat,omitempty"`
+}
+
+type Frame struct {
+	Name   string `json:"name"`
+	Parent int    `json:"parent,omitempty"`
+}