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// 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.
// Code generated by "gen.bash" from internal/trace; DO NOT EDIT.
//go:build go1.23
// Regression test for #55160.
//
// The issue is that the parser reads ahead to the first batch of the
// next generation to find generation boundaries, but if it finds an
// error, it needs to delay handling that error until later. Previously
// it would handle that error immediately and a totally valid generation
// would be skipped for parsing and rejected because of an error in a
// batch in the following generation.
//
// This test captures this behavior by making both the first generation
// and second generation bad. It requires that the issue in the first
// generation, which is caught when actually ordering events, be reported
// instead of the second one.
package main
import (
"golang.org/x/exp/trace/internal/testgen"
"golang.org/x/exp/trace/internal/tracev2"
"golang.org/x/exp/trace/internal/version"
)
func main() {
testgen.Main(version.Go122, gen)
}
func gen(t *testgen.Trace) {
// A running goroutine emits a task begin.
t.RawEvent(tracev2.EvEventBatch, nil, 1 /*gen*/, 0 /*thread ID*/, 0 /*timestamp*/, 5 /*batch length*/)
t.RawEvent(tracev2.EvFrequency, nil, 15625000)
// A running goroutine emits a task begin.
t.RawEvent(tracev2.EvEventBatch, nil, 1 /*gen*/, 0 /*thread ID*/, 0 /*timestamp*/, 5 /*batch length*/)
t.RawEvent(tracev2.EvGoCreate, nil, 0 /*timestamp delta*/, 1 /*go ID*/, 0, 0)
// Write an invalid batch event for the next generation.
t.RawEvent(tracev2.EvEventBatch, nil, 2 /*gen*/, 0 /*thread ID*/, 0 /*timestamp*/, 50 /*batch length (invalid)*/)
// We should fail at the first issue, not the second one.
t.ExpectFailure("expected a proc but didn't have one")
}
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