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// RUN: %clang_tsan %s -o %t -framework Foundation
// RUN: %deflake %run %t 2>&1 | FileCheck %s
// UNSUPPORTED: ios
#import <Foundation/Foundation.h>
#import <xpc/xpc.h>
#import "../test.h"
long global;
long received_msgs;
xpc_connection_t server_conn;
xpc_connection_t client_conns[2];
int main(int argc, const char *argv[]) {
@autoreleasepool {
NSLog(@"Hello world.");
barrier_init(&barrier, 2);
dispatch_queue_t server_q = dispatch_queue_create("server.queue", DISPATCH_QUEUE_CONCURRENT);
server_conn = xpc_connection_create(NULL, server_q);
xpc_connection_set_event_handler(server_conn, ^(xpc_object_t client) {
NSLog(@"server event handler, client = %@", client);
if (client == XPC_ERROR_CONNECTION_INTERRUPTED || client == XPC_ERROR_CONNECTION_INVALID) {
return;
}
xpc_connection_set_event_handler(client, ^(xpc_object_t object) {
NSLog(@"received message: %@", object);
barrier_wait(&barrier);
global = 42;
dispatch_sync(dispatch_get_main_queue(), ^{
received_msgs++;
if (received_msgs >= 2) {
xpc_connection_cancel(client_conns[0]);
xpc_connection_cancel(client_conns[1]);
xpc_connection_cancel(server_conn);
CFRunLoopStop(CFRunLoopGetCurrent());
}
});
});
xpc_connection_resume(client);
});
xpc_connection_resume(server_conn);
xpc_endpoint_t endpoint = xpc_endpoint_create(server_conn);
for (int i = 0; i < 2; i++) {
client_conns[i] = xpc_connection_create_from_endpoint(endpoint);
xpc_connection_set_event_handler(client_conns[i], ^(xpc_object_t event) {
NSLog(@"client event handler, event = %@", event);
});
xpc_object_t msg = xpc_dictionary_create(NULL, NULL, 0);
xpc_dictionary_set_string(msg, "hello", "world");
NSLog(@"sending message: %@", msg);
xpc_connection_send_message(client_conns[i], msg);
xpc_connection_resume(client_conns[i]);
}
CFRunLoopRun();
NSLog(@"Done.");
}
return 0;
}
// CHECK: Hello world.
// CHECK: WARNING: ThreadSanitizer: data race
// CHECK: Write of size 8
// CHECK: #0 {{.*}}xpc-race.mm:36
// CHECK: Previous write of size 8
// CHECK: #0 {{.*}}xpc-race.mm:36
// CHECK: Location is global 'global'
// CHECK: Done.
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