61 lines
1.1 KiB
Go
61 lines
1.1 KiB
Go
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// Copyright 2016 The Go Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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//go:build !plan9 && !windows
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// +build !plan9,!windows
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// Test that a sequence of callbacks from C to Go get the same m.
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// This failed to be true on arm and arm64, which was the root cause
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// of issue 13881.
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package main
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/*
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#include <stddef.h>
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#include <pthread.h>
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extern void GoCheckM();
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static void* thread(void* arg __attribute__ ((unused))) {
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GoCheckM();
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return NULL;
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}
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static void CheckM() {
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pthread_t tid;
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pthread_create(&tid, NULL, thread, NULL);
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pthread_join(tid, NULL);
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pthread_create(&tid, NULL, thread, NULL);
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pthread_join(tid, NULL);
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}
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*/
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import "C"
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import (
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"fmt"
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"os"
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)
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func init() {
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register("EnsureDropM", EnsureDropM)
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}
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var savedM uintptr
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//export GoCheckM
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func GoCheckM() {
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m := runtime_getm_for_test()
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if savedM == 0 {
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savedM = m
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} else if savedM != m {
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fmt.Printf("m == %x want %x\n", m, savedM)
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os.Exit(1)
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}
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}
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func EnsureDropM() {
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C.CheckM()
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fmt.Println("OK")
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}
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