// 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 !windows

package cgotest

/*
#cgo CFLAGS: -pthread
#cgo LDFLAGS: -pthread
extern int RunSigThread();
extern int CheckBlocked();
*/
import "C"
import (
	"os"
	"os/signal"
	"syscall"
	"testing"
)

var blocked bool

//export IntoGoAndBack

package main

// Setting an environment variable in a cgo program changes the C
// environment. Test that this does not confuse the race detector.

/*
#cgo CFLAGS: -fsanitize=thread
#cgo LDFLAGS: -fsanitize=thread
*/
import "C"

import (
	"fmt"
	"os"
	"sync"
	"time"
)

func main() {
	var wg sync.WaitGroup
	var mu sync.Mutex
	f := func() {
		defer wg.Done()

// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.

//go:build darwin

package issue24161e0

/*
#cgo CFLAGS: -x objective-c
#cgo LDFLAGS: -framework CoreFoundation -framework Security
#include <TargetConditionals.h>
#include <CoreFoundation/CoreFoundation.h>
#include <Security/Security.h>

package main

// This program produced false race reports when run under the C/C++
// ThreadSanitizer, as it did not understand the synchronization in
// the Go code.

/*
#cgo CFLAGS: -fsanitize=thread
#cgo LDFLAGS: -fsanitize=thread

extern void GoRun(void);

// Yes, you can have definitions if you use //export, as long as they are weak.

int val __attribute__ ((weak));

// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.

//go:build darwin

package issue24161e2

/*
#cgo CFLAGS: -x objective-c
#cgo LDFLAGS: -framework CoreFoundation -framework Security
#include <TargetConditionals.h>
#include <CoreFoundation/CoreFoundation.h>
#include <Security/Security.h>

//go:build !android

// Test that pthread_cancel works as expected
// (NPTL uses SIGRTMIN to implement thread cancellation)
// See https://golang.org/issue/6997
package cgotest

/*
#cgo CFLAGS: -pthread
#cgo LDFLAGS: -pthread
extern int StartThread();
extern int CancelThread();
*/
import "C"

import (
	"testing"
	"time"
)

func test6997(t *testing.T) {
	r := C.StartThread()
	if r != 0 {

// license that can be found in the LICENSE file.

package main

// Check that writes to Go allocated memory, with Go synchronization,
// do not look like a race.

/*
#cgo CFLAGS: -fsanitize=thread
#cgo LDFLAGS: -fsanitize=thread

void f(char *p) {
	*p = 1;
}
*/
import "C"

import (
	"runtime"
	"sync"
)

func main() {
	var wg sync.WaitGroup
	var mu sync.Mutex

// license that can be found in the LICENSE file.

package main

// Check that calls to C.malloc/C.free do not collide with the calls
// made by the os/user package.

// #cgo CFLAGS: -fsanitize=thread
// #cgo LDFLAGS: -fsanitize=thread
// #include <stdlib.h>
import "C"

import (
	"fmt"
	"os"
	"os/user"
	"runtime"
	"sync"
)

func main() {
	u, err := user.Current()
	if err != nil {

// TSAN library was not keeping track of whether signals should be
// delivered on the alternate signal stack, and the Go signal handler
// was not preserving callee-saved registers from C callers.

/*
#cgo CFLAGS: -g -fsanitize=thread
#cgo LDFLAGS: -g -fsanitize=thread

#include <stdlib.h>
#include <sys/time.h>

void spin() {
	size_t n;
	struct timeval tvstart, tvnow;
	int diff;
	void *prev = NULL, *cur;

// run for an arbitrarily long time without triggering the libc interceptors.
// See https://golang.org/issue/18717.

import (
	"os"
	"os/signal"
	"syscall"
)

/*
#cgo CFLAGS: -g -fsanitize=thread
#cgo LDFLAGS: -g -fsanitize=thread

#include <signal.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>

static void raise_usr2(int signo) {
	raise(SIGUSR2);
}