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<title>[209418] trunk/Source/WebKit2</title>
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<dt>Revision</dt> <dd><a href="http://trac.webkit.org/projects/webkit/changeset/209418">209418</a></dd>
<dt>Author</dt> <dd>andersca@apple.com</dd>
<dt>Date</dt> <dd>2016-12-06 13:59:51 -0800 (Tue, 06 Dec 2016)</dd>
</dl>
<h3>Log Message</h3>
<pre>Add a new MachMessage class and use it for sending outgoing messages
https://bugs.webkit.org/show_bug.cgi?id=165484
Reviewed by Sam Weinig.
* Platform/IPC/mac/ConnectionMac.mm:
(IPC::Connection::sendOutgoingMessage):
Instead of trying to randomly use memory from the stack as well as using mmap for the message data for out of line messages
(which makes no sense at all, since the body data is already mmapped), just always create a MachMessage object and use it.
(IPC::machMessageSize): Deleted.
This has been moved to MachMessage::messageSize().
* Platform/IPC/mac/MachMessage.cpp: Added.
(IPC::MachMessage::create):
Allocate extra memory to store the actual buffer.
(IPC::MachMessage::MachMessage):
Initialize variables. m_size isn't really used right now, but will be in a subsequent patch.
(IPC::MachMessage::header):
Return the header.
* Platform/IPC/mac/MachMessage.h: Added.
(IPC::MachMessage::length):
* WebKit2.xcodeproj/project.pbxproj:
Add new files.</pre>
<h3>Modified Paths</h3>
<ul>
<li><a href="#trunkSourceWebKit2ChangeLog">trunk/Source/WebKit2/ChangeLog</a></li>
<li><a href="#trunkSourceWebKit2PlatformIPCmacConnectionMacmm">trunk/Source/WebKit2/Platform/IPC/mac/ConnectionMac.mm</a></li>
<li><a href="#trunkSourceWebKit2WebKit2xcodeprojprojectpbxproj">trunk/Source/WebKit2/WebKit2.xcodeproj/project.pbxproj</a></li>
</ul>
<h3>Added Paths</h3>
<ul>
<li><a href="#trunkSourceWebKit2PlatformIPCmacMachMessagecpp">trunk/Source/WebKit2/Platform/IPC/mac/MachMessage.cpp</a></li>
<li><a href="#trunkSourceWebKit2PlatformIPCmacMachMessageh">trunk/Source/WebKit2/Platform/IPC/mac/MachMessage.h</a></li>
</ul>
</div>
<div id="patch">
<h3>Diff</h3>
<a id="trunkSourceWebKit2ChangeLog"></a>
<div class="modfile"><h4>Modified: trunk/Source/WebKit2/ChangeLog (209417 => 209418)</h4>
<pre class="diff"><span>
<span class="info">--- trunk/Source/WebKit2/ChangeLog 2016-12-06 21:52:18 UTC (rev 209417)
+++ trunk/Source/WebKit2/ChangeLog 2016-12-06 21:59:51 UTC (rev 209418)
</span><span class="lines">@@ -1,3 +1,34 @@
</span><ins>+2016-12-06 Anders Carlsson <andersca@apple.com>
+
+ Add a new MachMessage class and use it for sending outgoing messages
+ https://bugs.webkit.org/show_bug.cgi?id=165484
+
+ Reviewed by Sam Weinig.
+
+ * Platform/IPC/mac/ConnectionMac.mm:
+ (IPC::Connection::sendOutgoingMessage):
+ Instead of trying to randomly use memory from the stack as well as using mmap for the message data for out of line messages
+ (which makes no sense at all, since the body data is already mmapped), just always create a MachMessage object and use it.
+
+ (IPC::machMessageSize): Deleted.
+ This has been moved to MachMessage::messageSize().
+
+ * Platform/IPC/mac/MachMessage.cpp: Added.
+ (IPC::MachMessage::create):
+ Allocate extra memory to store the actual buffer.
+
+ (IPC::MachMessage::MachMessage):
+ Initialize variables. m_size isn't really used right now, but will be in a subsequent patch.
+
+ (IPC::MachMessage::header):
+ Return the header.
+
+ * Platform/IPC/mac/MachMessage.h: Added.
+ (IPC::MachMessage::length):
+
+ * WebKit2.xcodeproj/project.pbxproj:
+ Add new files.
+
</ins><span class="cx"> 2016-12-06 Simon Fraser <simon.fraser@apple.com>
</span><span class="cx">
</span><span class="cx"> Enable visual viewports by default on Mac, and iOS Wk2
</span></span></pre></div>
<a id="trunkSourceWebKit2PlatformIPCmacConnectionMacmm"></a>
<div class="modfile"><h4>Modified: trunk/Source/WebKit2/Platform/IPC/mac/ConnectionMac.mm (209417 => 209418)</h4>
<pre class="diff"><span>
<span class="info">--- trunk/Source/WebKit2/Platform/IPC/mac/ConnectionMac.mm 2016-12-06 21:52:18 UTC (rev 209417)
+++ trunk/Source/WebKit2/Platform/IPC/mac/ConnectionMac.mm 2016-12-06 21:59:51 UTC (rev 209418)
</span><span class="lines">@@ -28,6 +28,7 @@
</span><span class="cx">
</span><span class="cx"> #include "DataReference.h"
</span><span class="cx"> #include "ImportanceAssertion.h"
</span><ins>+#include "MachMessage.h"
</ins><span class="cx"> #include "MachPort.h"
</span><span class="cx"> #include "MachUtilities.h"
</span><span class="cx"> #include <WebCore/AXObjectCache.h>
</span><span class="lines">@@ -258,19 +259,6 @@
</span><span class="cx"> return true;
</span><span class="cx"> }
</span><span class="cx">
</span><del>-static inline size_t machMessageSize(size_t bodySize, size_t numberOfPortDescriptors = 0, size_t numberOfOOLMemoryDescriptors = 0)
-{
- size_t size = sizeof(mach_msg_header_t) + bodySize;
- if (numberOfPortDescriptors || numberOfOOLMemoryDescriptors) {
- size += sizeof(mach_msg_body_t);
- if (numberOfPortDescriptors)
- size += (numberOfPortDescriptors * sizeof(mach_msg_port_descriptor_t));
- if (numberOfOOLMemoryDescriptors)
- size += (numberOfOOLMemoryDescriptors * sizeof(mach_msg_ool_descriptor_t));
- }
- return round_msg(size);
-}
-
</del><span class="cx"> bool Connection::platformCanSendOutgoingMessages() const
</span><span class="cx"> {
</span><span class="cx"> return true;
</span><span class="lines">@@ -288,7 +276,7 @@
</span><span class="cx"> numberOfPortDescriptors++;
</span><span class="cx"> }
</span><span class="cx">
</span><del>- size_t messageSize = machMessageSize(encoder->bufferSize(), numberOfPortDescriptors, numberOfOOLMemoryDescriptors);
</del><ins>+ size_t messageSize = MachMessage::messageSize(encoder->bufferSize(), numberOfPortDescriptors, numberOfOOLMemoryDescriptors);
</ins><span class="cx">
</span><span class="cx"> bool messageBodyIsOOL = false;
</span><span class="cx"> if (messageSize > inlineMessageMaxSize) {
</span><span class="lines">@@ -295,20 +283,14 @@
</span><span class="cx"> messageBodyIsOOL = true;
</span><span class="cx">
</span><span class="cx"> numberOfOOLMemoryDescriptors++;
</span><del>- messageSize = machMessageSize(0, numberOfPortDescriptors, numberOfOOLMemoryDescriptors);
</del><ins>+ messageSize = MachMessage::messageSize(0, numberOfPortDescriptors, numberOfOOLMemoryDescriptors);
</ins><span class="cx"> }
</span><span class="cx">
</span><del>- char stackBuffer[inlineMessageMaxSize];
- char* buffer = &stackBuffer[0];
- if (messageSize > inlineMessageMaxSize) {
- buffer = (char*)mmap(0, messageSize, PROT_READ | PROT_WRITE, MAP_ANON | MAP_PRIVATE, -1, 0);
- if (buffer == MAP_FAILED)
- return false;
- }
</del><ins>+ auto message = MachMessage::create(messageSize);
</ins><span class="cx">
</span><del>- bool isComplex = (numberOfPortDescriptors + numberOfOOLMemoryDescriptors > 0);
</del><ins>+ bool isComplex = (numberOfPortDescriptors + numberOfOOLMemoryDescriptors) > 0;
</ins><span class="cx">
</span><del>- mach_msg_header_t* header = reinterpret_cast<mach_msg_header_t*>(buffer);
</del><ins>+ mach_msg_header_t* header = message->header();
</ins><span class="cx"> header->msgh_bits = MACH_MSGH_BITS(MACH_MSG_TYPE_COPY_SEND, 0);
</span><span class="cx"> header->msgh_size = messageSize;
</span><span class="cx"> header->msgh_remote_port = m_sendPort;
</span><span class="lines">@@ -371,9 +353,6 @@
</span><span class="cx"> // FIXME: What should we do here?
</span><span class="cx"> }
</span><span class="cx">
</span><del>- if (buffer != &stackBuffer[0])
- munmap(buffer, messageSize);
-
</del><span class="cx"> return true;
</span><span class="cx"> }
</span><span class="cx">
</span></span></pre></div>
<a id="trunkSourceWebKit2PlatformIPCmacMachMessagecpp"></a>
<div class="addfile"><h4>Added: trunk/Source/WebKit2/Platform/IPC/mac/MachMessage.cpp (0 => 209418)</h4>
<pre class="diff"><span>
<span class="info">--- trunk/Source/WebKit2/Platform/IPC/mac/MachMessage.cpp (rev 0)
+++ trunk/Source/WebKit2/Platform/IPC/mac/MachMessage.cpp 2016-12-06 21:59:51 UTC (rev 209418)
</span><span class="lines">@@ -0,0 +1,67 @@
</span><ins>+/*
+ * Copyright (C) 2016 Apple Inc. All rights reserved.
+ *
+ * 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 "MachMessage.h"
+
+namespace IPC {
+
+std::unique_ptr<MachMessage> MachMessage::create(size_t length)
+{
+ void* memory = WTF::fastMalloc(sizeof(MachMessage) + length);
+ return std::unique_ptr<MachMessage> { new (NotNull, memory) MachMessage { length } };
+}
+
+MachMessage::MachMessage(size_t length)
+ : m_length { length }
+{
+}
+
+MachMessage::~MachMessage()
+{
+}
+
+size_t MachMessage::messageSize(size_t bodySize, size_t portDescriptorCount, size_t memoryDescriptorCount)
+{
+ size_t messageSize = sizeof(mach_msg_header_t) + bodySize;
+
+ if (portDescriptorCount || memoryDescriptorCount) {
+ messageSize += sizeof(mach_msg_body_t);
+
+ if (portDescriptorCount)
+ messageSize += (portDescriptorCount * sizeof(mach_msg_port_descriptor_t));
+ if (memoryDescriptorCount)
+ messageSize += (memoryDescriptorCount * sizeof(mach_msg_ool_descriptor_t));
+ }
+
+ return round_msg(messageSize);
+}
+
+mach_msg_header_t* MachMessage::header()
+{
+ return reinterpret_cast<mach_msg_header_t*>(m_buffer);
+}
+
+}
</ins></span></pre></div>
<a id="trunkSourceWebKit2PlatformIPCmacMachMessageh"></a>
<div class="addfile"><h4>Added: trunk/Source/WebKit2/Platform/IPC/mac/MachMessage.h (0 => 209418)</h4>
<pre class="diff"><span>
<span class="info">--- trunk/Source/WebKit2/Platform/IPC/mac/MachMessage.h (rev 0)
+++ trunk/Source/WebKit2/Platform/IPC/mac/MachMessage.h 2016-12-06 21:59:51 UTC (rev 209418)
</span><span class="lines">@@ -0,0 +1,50 @@
</span><ins>+/*
+ * Copyright (C) 2016 Apple Inc. All rights reserved.
+ *
+ * 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.
+ */
+
+#pragma once
+
+#include <memory>
+
+namespace IPC {
+
+class MachMessage {
+ WTF_MAKE_FAST_ALLOCATED;
+public:
+ static std::unique_ptr<MachMessage> create(size_t length);
+ ~MachMessage();
+
+ static size_t messageSize(size_t bodySize, size_t portDescriptorCount, size_t memoryDescriptorCount);
+
+ size_t length() const { return m_length; }
+ mach_msg_header_t* header();
+
+private:
+ MachMessage(size_t length);
+
+ size_t m_length;
+ uint8_t m_buffer[0];
+};
+
+}
</ins></span></pre></div>
<a id="trunkSourceWebKit2WebKit2xcodeprojprojectpbxproj"></a>
<div class="modfile"><h4>Modified: trunk/Source/WebKit2/WebKit2.xcodeproj/project.pbxproj (209417 => 209418)</h4>
<pre class="diff"><span>
<span class="info">--- trunk/Source/WebKit2/WebKit2.xcodeproj/project.pbxproj 2016-12-06 21:52:18 UTC (rev 209417)
+++ trunk/Source/WebKit2/WebKit2.xcodeproj/project.pbxproj 2016-12-06 21:59:51 UTC (rev 209418)
</span><span class="lines">@@ -284,6 +284,8 @@
</span><span class="cx"> 1A6563E51B7A8C50009CF787 /* APIWindowFeatures.h in Headers */ = {isa = PBXBuildFile; fileRef = 1A6563E31B7A8C50009CF787 /* APIWindowFeatures.h */; };
</span><span class="cx"> 1A66BF8F18A052ED002071B4 /* WKWebViewInternal.h in Headers */ = {isa = PBXBuildFile; fileRef = 1A66BF8E18A052ED002071B4 /* WKWebViewInternal.h */; };
</span><span class="cx"> 1A67CD2E1CBC513F00BFE3EA /* WKOpenPanelParametersInternal.h in Headers */ = {isa = PBXBuildFile; fileRef = 1A67CD2D1CBC513F00BFE3EA /* WKOpenPanelParametersInternal.h */; };
</span><ins>+ 1A6D86C11DF75265007745E8 /* MachMessage.cpp in Sources */ = {isa = PBXBuildFile; fileRef = 1A6D86BF1DF75265007745E8 /* MachMessage.cpp */; };
+ 1A6D86C21DF75265007745E8 /* MachMessage.h in Headers */ = {isa = PBXBuildFile; fileRef = 1A6D86C01DF75265007745E8 /* MachMessage.h */; };
</ins><span class="cx"> 1A6FA21E1BD0435B00AAA650 /* WKFrameInfoPrivate.h in Headers */ = {isa = PBXBuildFile; fileRef = 1A6FA21D1BD0435B00AAA650 /* WKFrameInfoPrivate.h */; settings = {ATTRIBUTES = (Private, ); }; };
</span><span class="cx"> 1A6FB7AE11E64B6800DB1371 /* PluginView.cpp in Sources */ = {isa = PBXBuildFile; fileRef = 1A6FB7AC11E64B6800DB1371 /* PluginView.cpp */; };
</span><span class="cx"> 1A6FB7AF11E64B6800DB1371 /* PluginView.h in Headers */ = {isa = PBXBuildFile; fileRef = 1A6FB7AD11E64B6800DB1371 /* PluginView.h */; };
</span><span class="lines">@@ -2312,6 +2314,8 @@
</span><span class="cx"> 1A67CD2D1CBC513F00BFE3EA /* WKOpenPanelParametersInternal.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = WKOpenPanelParametersInternal.h; sourceTree = "<group>"; };
</span><span class="cx"> 1A6D141F1B0167D500785FF0 /* Info-OSX-10.9-10.10.plist */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = text.plist.xml; path = "Info-OSX-10.9-10.10.plist"; sourceTree = "<group>"; };
</span><span class="cx"> 1A6D14211B01681600785FF0 /* PluginService.32-64-10.9-10.10.Info.plist */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = text.plist.xml; name = "PluginService.32-64-10.9-10.10.Info.plist"; path = "PluginProcess/EntryPoint/mac/XPCService/PluginService.32-64-10.9-10.10.Info.plist"; sourceTree = SOURCE_ROOT; };
</span><ins>+ 1A6D86BF1DF75265007745E8 /* MachMessage.cpp */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.cpp.cpp; path = MachMessage.cpp; sourceTree = "<group>"; };
+ 1A6D86C01DF75265007745E8 /* MachMessage.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = MachMessage.h; sourceTree = "<group>"; };
</ins><span class="cx"> 1A6FA21D1BD0435B00AAA650 /* WKFrameInfoPrivate.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = WKFrameInfoPrivate.h; sourceTree = "<group>"; };
</span><span class="cx"> 1A6FB7AC11E64B6800DB1371 /* PluginView.cpp */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.cpp.cpp; path = PluginView.cpp; sourceTree = "<group>"; };
</span><span class="cx"> 1A6FB7AD11E64B6800DB1371 /* PluginView.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = PluginView.h; sourceTree = "<group>"; };
</span><span class="lines">@@ -6978,6 +6982,8 @@
</span><span class="cx"> children = (
</span><span class="cx"> 1A30EAC5115D7DA30053E937 /* ConnectionMac.mm */,
</span><span class="cx"> 1A1EC69D1872092100B951F0 /* ImportanceAssertion.h */,
</span><ins>+ 1A6D86BF1DF75265007745E8 /* MachMessage.cpp */,
+ 1A6D86C01DF75265007745E8 /* MachMessage.h */,
</ins><span class="cx"> BCC56F771159957D001CCAF9 /* MachPort.h */,
</span><span class="cx"> );
</span><span class="cx"> path = mac;
</span><span class="lines">@@ -7633,6 +7639,7 @@
</span><span class="cx"> 2DF9EEEC1A7836EE00B6CFBE /* APINavigationAction.h in Headers */,
</span><span class="cx"> 2DD9EB2D1A6F012500BB1267 /* APINavigationClient.h in Headers */,
</span><span class="cx"> BCF69FA21176D01400471A52 /* APINavigationData.h in Headers */,
</span><ins>+ 1A6D86C21DF75265007745E8 /* MachMessage.h in Headers */,
</ins><span class="cx"> 2DF9EEEE1A786EAD00B6CFBE /* APINavigationResponse.h in Headers */,
</span><span class="cx"> BC33DD681238464600360F3F /* APINumber.h in Headers */,
</span><span class="cx"> BC857FB512B830E600EDEB2E /* APIOpenPanelParameters.h in Headers */,
</span><span class="lines">@@ -9522,6 +9529,7 @@
</span><span class="cx"> F6A90813133C20510082C3F4 /* WebCookieManagerMac.mm in Sources */,
</span><span class="cx"> 330934471315B9220097A7BC /* WebCookieManagerMessageReceiver.cpp in Sources */,
</span><span class="cx"> 330934551315B9750097A7BC /* WebCookieManagerProxy.cpp in Sources */,
</span><ins>+ 1A6D86C11DF75265007745E8 /* MachMessage.cpp in Sources */,
</ins><span class="cx"> 33AA1066131F060000D4A575 /* WebCookieManagerProxyClient.cpp in Sources */,
</span><span class="cx"> F6D632BC133D198200743D77 /* WebCookieManagerProxyMac.mm in Sources */,
</span><span class="cx"> 330934491315B9220097A7BC /* WebCookieManagerProxyMessageReceiver.cpp in Sources */,
</span></span></pre>
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