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When Go code is used with C code compiled with -fsanitize=thread, adds thread sanitizer calls so that correctly synchronized Go code does not cause spurious failure reports from the thread sanitizer. This may cause some false negatives, but for the thread sanitizer what is most important is avoiding false positives. Change-Id: If670e4a6f2874c7a2be2ff7db8728c6036340a52 Reviewed-on: https://go-review.googlesource.com/17421 Reviewed-by: Dmitry Vyukov <dvyukov@google.com>
45 lines
701 B
Go
45 lines
701 B
Go
// Copyright 2015 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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package main
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// This program produced false race reports when run under the C/C++
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// ThreadSanitizer, as it did not understand the synchronization in
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// the Go code.
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/*
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#cgo CFLAGS: -fsanitize=thread
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#cgo LDFLAGS: -fsanitize=thread
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int val;
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int getVal() {
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return val;
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}
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void setVal(int i) {
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val = i;
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}
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*/
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import "C"
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import (
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"runtime"
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)
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func main() {
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runtime.LockOSThread()
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C.setVal(1)
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c := make(chan bool)
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go func() {
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runtime.LockOSThread()
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C.setVal(2)
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c <- true
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}()
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<-c
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if v := C.getVal(); v != 2 {
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panic(v)
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}
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}
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