mappedType = go122.EvProcStatus
			mappedArgs = timedEventArgs{uint64(ev.P), uint64(go122.ProcIdle)}
		}
	case oldtrace.EvGCStart:
		mappedType = go122.EvGCBegin
	case oldtrace.EvGCDone:
		mappedType = go122.EvGCEnd
	case oldtrace.EvSTWStart:
		sid := it.builtinToStringID[sSTWUnknown+it.trace.STWReason(ev.Args[0])]
		it.lastStwReason = sid
		mappedType = go122.EvSTWBegin

	go122.EvHeapAlloc:           EventMetric,
	go122.EvHeapGoal:            EventMetric,
	go122.EvGoLabel:             EventLabel,
	go122.EvUserTaskBegin:       EventTaskBegin,
	go122.EvUserTaskEnd:         EventTaskEnd,
	go122.EvUserRegionBegin:     EventRegionBegin,
	go122.EvUserRegionEnd:       EventRegionEnd,
	go122.EvUserLog:             EventLog,
	go122.EvGoSwitch:            EventStateTransition,

	hdr, err := r.ReadByte() // Consume the EvStrings byte.
	if err != nil || event.Type(hdr) != go122.EvStrings {
		return fmt.Errorf("missing strings batch header")
	}

	var sb strings.Builder
	for r.Len() != 0 {
		// Read the header.
		ev, err := r.ReadByte()
		if err != nil {
			return err
		}
		if event.Type(ev) != go122.EvString {
			return fmt.Errorf("expected string event, got %d", ev)
		}

Carlos Amedee <******@****.***> 1715265901 -0400

package trace_test

import (
	"internal/trace"
	"internal/trace/testtrace"
	"io"
	"testing"
)

func TestSummarizeGoroutinesTrace(t *testing.T) {
	summaries := summarizeTraceTest(t, "testdata/tests/go122-gc-stress.test").Goroutines
	var (
		hasSchedWaitTime    bool
		hasSyncBlockTime    bool
		hasGCMarkAssistTime bool
	)

	assertContainsGoroutine(t, summaries, "runtime.gcBgMarkWorker")

	FMT, sort
	< internal/diff;

	FMT
	< internal/txtar;

	# v2 execution trace parser.
	FMT
	< internal/trace/event;

	internal/trace/event
	< internal/trace/event/go122;

	FMT, io, internal/trace/event/go122
	< internal/trace/version;

	FMT, encoding/binary, internal/trace/version
	< internal/trace/raw;

	FMT, internal/trace/event, internal/trace/version, io, sort, encoding/binary

// Copyright 2023 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 go122

import (
	"fmt"
	"internal/trace/event"
)

const (
	EvNone event.Type = iota // unused

	// Structural events.
	EvEventBatch // start of per-M batch of events [generation, M ID, timestamp, batch length]