From 47ab3d4a42e9ab51c465c4322d2ec233f6324e6b Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Sun, 28 Apr 2024 15:16:40 +0200 Subject: Adding upstream version 1.18.10. Signed-off-by: Daniel Baumann --- src/runtime/race/sched_test.go | 48 ++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 48 insertions(+) create mode 100644 src/runtime/race/sched_test.go (limited to 'src/runtime/race/sched_test.go') diff --git a/src/runtime/race/sched_test.go b/src/runtime/race/sched_test.go new file mode 100644 index 0000000..9fe83ea --- /dev/null +++ b/src/runtime/race/sched_test.go @@ -0,0 +1,48 @@ +// Copyright 2015 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. + +//go:build race + +package race_test + +import ( + "bytes" + "fmt" + "reflect" + "runtime" + "testing" +) + +func TestRandomScheduling(t *testing.T) { + // Scheduler is most consistent with GOMAXPROCS=1. + // Use that to make the test most likely to fail. + defer runtime.GOMAXPROCS(runtime.GOMAXPROCS(1)) + const N = 10 + out := make([][]int, N) + for i := 0; i < N; i++ { + c := make(chan int, N) + for j := 0; j < N; j++ { + go func(j int) { + c <- j + }(j) + } + row := make([]int, N) + for j := 0; j < N; j++ { + row[j] = <-c + } + out[i] = row + } + + for i := 0; i < N; i++ { + if !reflect.DeepEqual(out[0], out[i]) { + return // found a different order + } + } + + var buf bytes.Buffer + for i := 0; i < N; i++ { + fmt.Fprintf(&buf, "%v\n", out[i]) + } + t.Fatalf("consistent goroutine execution order:\n%v", buf.String()) +} -- cgit v1.2.3