1// Copyright 2023 The Go Authors. All rights reserved. 2// Use of this source code is governed by a BSD-style 3// license that can be found in the LICENSE file. 4 5// Regression test for an issue found in development. 6// 7// GoCreate events can happen on bare Ps in a variety of situations and 8// and earlier version of the parser assumed this wasn't possible. At 9// the time of writing, one such example is goroutines created by expiring 10// timers. 11 12package main 13 14import ( 15 "internal/trace" 16 "internal/trace/event/go122" 17 testgen "internal/trace/internal/testgen/go122" 18) 19 20func main() { 21 testgen.Main(gen) 22} 23 24func gen(t *testgen.Trace) { 25 g1 := t.Generation(1) 26 27 // A goroutine gets created on a running P, then starts running. 28 b0 := g1.Batch(trace.ThreadID(0), 0) 29 b0.Event("ProcStatus", trace.ProcID(0), go122.ProcRunning) 30 b0.Event("GoCreate", trace.GoID(5), testgen.NoStack, testgen.NoStack) 31 b0.Event("GoStart", trace.GoID(5), testgen.Seq(1)) 32 b0.Event("GoStop", "whatever", testgen.NoStack) 33} 34