1 files changed, 87 insertions, 0 deletions
diff --git a/Source/WebKit2/Platform/IPC/win/AttachmentWin.cpp b/Source/WebKit2/Platform/IPC/win/AttachmentWin.cpp
new file mode 100644
index 000000000..a81b22623
--- /dev/null
+++ b/Source/WebKit2/Platform/IPC/win/AttachmentWin.cpp
@@ -0,0 +1,87 @@
+/*
+ * Copyright (C) 2010 Apple Inc. All rights reserved.
+ * Copyright (C) 2017 Konstantin Tokarev <annulen@yandex.ru>
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
+ * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
+ * THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include "config.h"
+#include "Attachment.h"
+
+#include "ArgumentDecoder.h"
+#include "ArgumentEncoder.h"
+
+// FIXME: This code is duplicated with SharedMemory::Handle implementation for Win
+
+namespace IPC {
+
+void Attachment::encode(ArgumentEncoder& encoder) const
+{
+    // Hand off ownership of our HANDLE to the receiving process. It will close it for us.
+    // FIXME: If the receiving process crashes before it receives the memory, the memory will be
+    // leaked. See <http://webkit.org/b/47502>.
+    encoder << reinterpret_cast<uint64_t>(m_handle);
+
+    // Send along our PID so that the receiving process can duplicate the HANDLE for its own use.
+    encoder << static_cast<uint32_t>(::GetCurrentProcessId());
+}
+
+static bool getDuplicatedHandle(HANDLE sourceHandle, DWORD sourcePID, HANDLE& duplicatedHandle)
+{
+    duplicatedHandle = 0;
+    if (!sourceHandle)
+        return true;
+
+    HANDLE sourceProcess = ::OpenProcess(PROCESS_DUP_HANDLE, FALSE, sourcePID);
+    if (!sourceProcess)
+        return false;
+
+    // Copy the handle into our process and close the handle that the sending process created for us.
+    BOOL success = ::DuplicateHandle(sourceProcess, sourceHandle, ::GetCurrentProcess(), &duplicatedHandle, 0, FALSE, DUPLICATE_SAME_ACCESS | DUPLICATE_CLOSE_SOURCE);
+    ASSERT_WITH_MESSAGE(success, "::DuplicateHandle failed with error %lu", ::GetLastError());
+
+    ::CloseHandle(sourceProcess);
+
+    return success;
+}
+
+bool Attachment::decode(ArgumentDecoder& decoder, Attachment& attachment)
+{
+    ASSERT_ARG(attachment, !attachment.m_handle);
+
+    uint64_t sourceHandle;
+    if (!decoder.decode(sourceHandle))
+        return false;
+
+    uint32_t sourcePID;
+    if (!decoder.decode(sourcePID))
+        return false;
+
+    HANDLE duplicatedHandle;
+    if (!getDuplicatedHandle(reinterpret_cast<HANDLE>(sourceHandle), sourcePID, duplicatedHandle))
+        return false;
+
+    attachment.m_handle = duplicatedHandle;
+    return true;
+}
+
+} // namespace IPC