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| // RUN: %clangxx_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 <stdatomic.h>
#import "../test.h"
long global;
_Atomic(long) msg_counter;
_Atomic(long) processed_msgs;
xpc_connection_t server_conn;
xpc_connection_t client_conns[2];
int main(int argc, const char *argv[]) {
@autoreleasepool {
fprintf(stderr, "Hello world.\n");
// CHECK: 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) {
fprintf(stderr, "server event handler, client = %p\n", client);
if (client == XPC_ERROR_CONNECTION_INTERRUPTED || client == XPC_ERROR_CONNECTION_INVALID) {
return;
}
xpc_connection_set_event_handler(client, ^(xpc_object_t object) {
fprintf(stderr, "received message: %p\n", object);
long msg_number = atomic_fetch_add_explicit(&msg_counter, 1, memory_order_relaxed);
if (msg_number == 0)
barrier_wait(&barrier);
global++;
// CHECK: WARNING: ThreadSanitizer: data race
// CHECK: Write of size 8
// CHECK: #0 {{.*}}xpc-race.mm:[[@LINE-3]]
// CHECK: Previous write of size 8
// CHECK: #0 {{.*}}xpc-race.mm:[[@LINE-5]]
// CHECK: Location is global 'global'
if (msg_number == 1)
barrier_wait(&barrier);
atomic_fetch_add(&processed_msgs, 1);
dispatch_sync(dispatch_get_main_queue(), ^{
if (processed_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) {
fprintf(stderr, "client event handler, event = %p\n", event);
});
xpc_object_t msg = xpc_dictionary_create(NULL, NULL, 0);
xpc_dictionary_set_string(msg, "hello", "world");
fprintf(stderr, "sending message: %p\n", msg);
xpc_connection_send_message(client_conns[i], msg);
xpc_connection_resume(client_conns[i]);
}
CFRunLoopRun();
fprintf(stderr, "Done.\n");
// CHECK: Done.
}
return 0;
}
|