LayoutTests/ipc/stream-sync-reply-shared-memory.html

<!doctype html><!-- webkit-test-runner [ IPCTestingAPIEnabled=true ] -->
<title>Test that stream sync message can reply with shared memory</title>
<script src="../resources/testharness.js"></script>
<script src="../resources/testharnessreport.js"></script>
<body>
<script>
setup({ single_test: true });
if (window.IPC) { // For compiles with !ENABLE(IPC_TESTING_API)
    const defaultTimeout = 1000;
    const bufferSizeLog2 = 9;
    const streamTesterID = 447;
    for (const processTarget of IPC.processTargets) {
        const [streamConnection, serverConnectionHandle] = IPC.createStreamClientConnection(bufferSizeLog2, defaultTimeout);
        streamConnection.open();
        IPC.sendMessage(processTarget, 0, IPC.messages.IPCTester_CreateStreamTester.name, [
            { type: 'uint64_t', value: streamTesterID },
            { type: 'StreamServerConnectionHandle', value: serverConnectionHandle },
        ]);

        // Test starts here.
        try {
            const result = streamConnection.sendSyncMessage(streamTesterID, IPC.messages.IPCStreamTester_SyncMessageReturningSharedMemory1.name, [{ type: 'uint32_t', value: 8 }]);
            const firstReply = result.arguments[0];
            assert_equals(firstReply.type, "SharedMemory", `for ${ processTarget }`);
            assert_equals(firstReply.protection, "ReadOnly", `for ${ processTarget }`);
            assert_equals(Array.from(new Uint8Array(firstReply.value.readBytes(0, 8))).toString(), "0,1,2,3,4,5,6,7", `for ${ processTarget }`);
        } finally {
            IPC.sendSyncMessage(processTarget, 0, IPC.messages.IPCTester_ReleaseStreamTester.name, defaultTimeout, [{ type: 'uint64_t', value: streamTesterID }]);
            streamConnection.invalidate();
        }
    }
}
done();
</script>
</body>