| // Copyright 2014 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 && (darwin || freebsd || linux) | |
| package race_test | |
| import ( | |
| "sync/atomic" | |
| "syscall" | |
| "testing" | |
| "unsafe" | |
| ) | |
| // Test that race detector does not crash when accessing non-Go allocated memory (issue 9136). | |
| func TestNonGoMemory(t *testing.T) { | |
| data, err := syscall.Mmap(-1, 0, 4096, syscall.PROT_READ|syscall.PROT_WRITE, syscall.MAP_ANON|syscall.MAP_PRIVATE) | |
| if err != nil { | |
| t.Fatalf("failed to mmap memory: %v", err) | |
| } | |
| defer syscall.Munmap(data) | |
| p := (*uint32)(unsafe.Pointer(&data[0])) | |
| atomic.AddUint32(p, 1) | |
| (*p)++ | |
| if *p != 2 { | |
| t.Fatalf("data[0] = %v, expect 2", *p) | |
| } | |
| } | |