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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. // Regression test for an issue found in development. // // The issue is that EvUserTaskEnd events don't carry the // task type with them, so the parser needs to track that // information. But if the parser just tracks the string ID // and not the string itself, that string ID may not be valid // for use in future generations. package main import ( "internal/trace/v2" "internal/trace/v2/event/go122" testgen "internal/trace/v2/internal/testgen/go122" ) func main() { testgen.Main(gen) } func gen(t *testgen.Trace) { g1 := t.Generation(1) // A running goroutine emits a task begin. b1 := g1.Batch(trace.ThreadID(0), 0) b1.Event("ProcStatus", trace.ProcID(0), go122.ProcRunning) b1.Event("GoStatus", trace.GoID(1), trace.ThreadID(0), go122.GoRunning) b1.Event("UserTaskBegin", trace.TaskID(2), trace.TaskID(0) /* 0 means no parent, not background */, "my task", testgen.NoStack) g2 := t.Generation(2) // That same goroutine emits a task end in the following generation. b2 := g2.Batch(trace.ThreadID(0), 5) b2.Event("ProcStatus", trace.ProcID(0), go122.ProcRunning) b2.Event("GoStatus", trace.GoID(1), trace.ThreadID(0), go122.GoRunning) b2.Event("UserTaskEnd", trace.TaskID(2), testgen.NoStack) }
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