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<dt>Revision</dt> <dd><a href="http://trac.webkit.org/projects/webkit/changeset/180272">180272</a></dd>
<dt>Author</dt> <dd>ggaren@apple.com</dd>
<dt>Date</dt> <dd>2015-02-18 11:00:16 -0800 (Wed, 18 Feb 2015)</dd>
</dl>

<h3>Log Message</h3>
<pre>bmalloc: VMHeap should keep a record of all of its VM ranges (for malloc introspection)
https://bugs.webkit.org/show_bug.cgi?id=141759

Reviewed by Andreas Kling.

* bmalloc.xcodeproj/project.pbxproj:
* bmalloc/SuperChunk.h: Added.
(bmalloc::SuperChunk::create):
(bmalloc::SuperChunk::SuperChunk):
(bmalloc::SuperChunk::smallChunk):
(bmalloc::SuperChunk::mediumChunk):
(bmalloc::SuperChunk::largeChunk): Factored out super chunk creation
into a separate class, for clarity and type safety.

* bmalloc/VMHeap.cpp:
(bmalloc::VMHeap::grow):
(bmalloc::VMHeap::allocateSuperChunk): Renamed &quot;allocateSuperChunk&quot; to
&quot;grow&quot; because Andreas found &quot;allocateSuperChunk&quot; to be unclear.

* bmalloc/VMHeap.h: Track all our VM ranges. We will use this information
for malloc introspection.

(bmalloc::VMHeap::allocateSmallPage):
(bmalloc::VMHeap::allocateMediumPage):
(bmalloc::VMHeap::allocateLargeRange): Updated for renames.</pre>

<h3>Modified Paths</h3>
<ul>
<li><a href="#trunkSourcebmallocChangeLog">trunk/Source/bmalloc/ChangeLog</a></li>
<li><a href="#trunkSourcebmallocbmallocVMHeapcpp">trunk/Source/bmalloc/bmalloc/VMHeap.cpp</a></li>
<li><a href="#trunkSourcebmallocbmallocVMHeaph">trunk/Source/bmalloc/bmalloc/VMHeap.h</a></li>
<li><a href="#trunkSourcebmallocbmallocxcodeprojprojectpbxproj">trunk/Source/bmalloc/bmalloc.xcodeproj/project.pbxproj</a></li>
</ul>

<h3>Added Paths</h3>
<ul>
<li><a href="#trunkSourcebmallocbmallocSuperChunkh">trunk/Source/bmalloc/bmalloc/SuperChunk.h</a></li>
</ul>

</div>
<div id="patch">
<h3>Diff</h3>
<a id="trunkSourcebmallocChangeLog"></a>
<div class="modfile"><h4>Modified: trunk/Source/bmalloc/ChangeLog (180271 => 180272)</h4>
<pre class="diff"><span>
<span class="info">--- trunk/Source/bmalloc/ChangeLog        2015-02-18 18:29:00 UTC (rev 180271)
+++ trunk/Source/bmalloc/ChangeLog        2015-02-18 19:00:16 UTC (rev 180272)
</span><span class="lines">@@ -1,3 +1,31 @@
</span><ins>+2015-02-18  Geoffrey Garen  &lt;ggaren@apple.com&gt;
+
+        bmalloc: VMHeap should keep a record of all of its VM ranges (for malloc introspection)
+        https://bugs.webkit.org/show_bug.cgi?id=141759
+
+        Reviewed by Andreas Kling.
+
+        * bmalloc.xcodeproj/project.pbxproj:
+        * bmalloc/SuperChunk.h: Added.
+        (bmalloc::SuperChunk::create):
+        (bmalloc::SuperChunk::SuperChunk):
+        (bmalloc::SuperChunk::smallChunk):
+        (bmalloc::SuperChunk::mediumChunk):
+        (bmalloc::SuperChunk::largeChunk): Factored out super chunk creation
+        into a separate class, for clarity and type safety.
+
+        * bmalloc/VMHeap.cpp:
+        (bmalloc::VMHeap::grow):
+        (bmalloc::VMHeap::allocateSuperChunk): Renamed &quot;allocateSuperChunk&quot; to
+        &quot;grow&quot; because Andreas found &quot;allocateSuperChunk&quot; to be unclear.
+
+        * bmalloc/VMHeap.h: Track all our VM ranges. We will use this information
+        for malloc introspection.
+
+        (bmalloc::VMHeap::allocateSmallPage):
+        (bmalloc::VMHeap::allocateMediumPage):
+        (bmalloc::VMHeap::allocateLargeRange): Updated for renames.
+
</ins><span class="cx"> 2015-02-18  Zan Dobersek  &lt;zdobersek@igalia.com&gt;
</span><span class="cx"> 
</span><span class="cx">         Build bmalloc through CMake as a static library. It's then linked either
</span></span></pre></div>
<a id="trunkSourcebmallocbmallocSuperChunkh"></a>
<div class="addfile"><h4>Added: trunk/Source/bmalloc/bmalloc/SuperChunk.h (0 => 180272)</h4>
<pre class="diff"><span>
<span class="info">--- trunk/Source/bmalloc/bmalloc/SuperChunk.h                                (rev 0)
+++ trunk/Source/bmalloc/bmalloc/SuperChunk.h        2015-02-18 19:00:16 UTC (rev 180272)
</span><span class="lines">@@ -0,0 +1,80 @@
</span><ins>+/*
+ * Copyright (C) 2015 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. ``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
+ * 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. 
+ */
+
+#ifndef SuperChunk_h
+#define SuperChunk_h
+
+#include &quot;LargeChunk.h&quot;
+#include &quot;MediumChunk.h&quot;
+#include &quot;SmallChunk.h&quot;
+
+namespace bmalloc {
+
+class SuperChunk {
+public:
+    static SuperChunk* create();
+
+    SmallChunk* smallChunk();
+    MediumChunk* mediumChunk();
+    LargeChunk* largeChunk();
+
+private:
+    SuperChunk();
+};
+
+inline SuperChunk* SuperChunk::create()
+{
+    void* result = static_cast&lt;char*&gt;(vmAllocate(superChunkSize, superChunkSize));
+    return new (result) SuperChunk;
+}
+
+inline SuperChunk::SuperChunk()
+{
+    new (smallChunk()) SmallChunk;
+    new (mediumChunk()) MediumChunk;
+    new (largeChunk()) LargeChunk;
+}
+
+inline SmallChunk* SuperChunk::smallChunk()
+{
+    return reinterpret_cast&lt;SmallChunk*&gt;(
+        reinterpret_cast&lt;char*&gt;(this) + smallChunkOffset);
+}
+
+inline MediumChunk* SuperChunk::mediumChunk()
+{
+    return reinterpret_cast&lt;MediumChunk*&gt;(
+        reinterpret_cast&lt;char*&gt;(this) + mediumChunkOffset);
+}
+
+inline LargeChunk* SuperChunk::largeChunk()
+{
+    return reinterpret_cast&lt;LargeChunk*&gt;(
+        reinterpret_cast&lt;char*&gt;(this) + largeChunkOffset);
+}
+
+} // namespace bmalloc
+
+#endif // SuperChunk_h
</ins></span></pre></div>
<a id="trunkSourcebmallocbmallocVMHeapcpp"></a>
<div class="modfile"><h4>Modified: trunk/Source/bmalloc/bmalloc/VMHeap.cpp (180271 => 180272)</h4>
<pre class="diff"><span>
<span class="info">--- trunk/Source/bmalloc/bmalloc/VMHeap.cpp        2015-02-18 18:29:00 UTC (rev 180271)
+++ trunk/Source/bmalloc/bmalloc/VMHeap.cpp        2015-02-18 19:00:16 UTC (rev 180272)
</span><span class="lines">@@ -1,5 +1,5 @@
</span><span class="cx"> /*
</span><del>- * Copyright (C) 2014 Apple Inc. All rights reserved.
</del><ins>+ * Copyright (C) 2014, 2015 Apple Inc. All rights reserved.
</ins><span class="cx">  *
</span><span class="cx">  * Redistribution and use in source and binary forms, with or without
</span><span class="cx">  * modification, are permitted provided that the following conditions
</span><span class="lines">@@ -27,6 +27,7 @@
</span><span class="cx"> #include &quot;LargeChunk.h&quot;
</span><span class="cx"> #include &quot;Line.h&quot;
</span><span class="cx"> #include &quot;PerProcess.h&quot;
</span><ins>+#include &quot;SuperChunk.h&quot;
</ins><span class="cx"> #include &quot;VMHeap.h&quot;
</span><span class="cx"> #include &lt;thread&gt;
</span><span class="cx"> 
</span><span class="lines">@@ -36,19 +37,20 @@
</span><span class="cx"> {
</span><span class="cx"> }
</span><span class="cx"> 
</span><del>-void VMHeap::allocateSuperChunk()
</del><ins>+void VMHeap::grow()
</ins><span class="cx"> {
</span><del>-    char* superChunk = static_cast&lt;char*&gt;(vmAllocate(superChunkSize, superChunkSize));
</del><ins>+    SuperChunk* superChunk = SuperChunk::create();
+    m_superChunks.push(superChunk);
</ins><span class="cx"> 
</span><del>-    SmallChunk* smallChunk = new (superChunk + smallChunkOffset) SmallChunk;
</del><ins>+    SmallChunk* smallChunk = superChunk-&gt;smallChunk();
</ins><span class="cx">     for (auto* it = smallChunk-&gt;begin(); it != smallChunk-&gt;end(); ++it)
</span><span class="cx">         m_smallPages.push(it);
</span><span class="cx"> 
</span><del>-    MediumChunk* mediumChunk = new (superChunk + mediumChunkOffset) MediumChunk;
</del><ins>+    MediumChunk* mediumChunk = superChunk-&gt;mediumChunk();
</ins><span class="cx">     for (auto* it = mediumChunk-&gt;begin(); it != mediumChunk-&gt;end(); ++it)
</span><span class="cx">         m_mediumPages.push(it);
</span><span class="cx"> 
</span><del>-    LargeChunk* largeChunk = new (superChunk + largeChunkOffset) LargeChunk;
</del><ins>+    LargeChunk* largeChunk = superChunk-&gt;largeChunk();
</ins><span class="cx">     m_largeRanges.insert(BoundaryTag::init(largeChunk));
</span><span class="cx"> }
</span><span class="cx"> 
</span></span></pre></div>
<a id="trunkSourcebmallocbmallocVMHeaph"></a>
<div class="modfile"><h4>Modified: trunk/Source/bmalloc/bmalloc/VMHeap.h (180271 => 180272)</h4>
<pre class="diff"><span>
<span class="info">--- trunk/Source/bmalloc/bmalloc/VMHeap.h        2015-02-18 18:29:00 UTC (rev 180271)
+++ trunk/Source/bmalloc/bmalloc/VMHeap.h        2015-02-18 19:00:16 UTC (rev 180272)
</span><span class="lines">@@ -1,5 +1,5 @@
</span><span class="cx"> /*
</span><del>- * Copyright (C) 2014 Apple Inc. All rights reserved.
</del><ins>+ * Copyright (C) 2014, 2015 Apple Inc. All rights reserved.
</ins><span class="cx">  *
</span><span class="cx">  * Redistribution and use in source and binary forms, with or without
</span><span class="cx">  * modification, are permitted provided that the following conditions
</span><span class="lines">@@ -40,6 +40,7 @@
</span><span class="cx"> class BeginTag;
</span><span class="cx"> class EndTag;
</span><span class="cx"> class Heap;
</span><ins>+class SuperChunk;
</ins><span class="cx"> 
</span><span class="cx"> class VMHeap {
</span><span class="cx"> public:
</span><span class="lines">@@ -55,17 +56,18 @@
</span><span class="cx">     void deallocateLargeRange(std::unique_lock&lt;StaticMutex&gt;&amp;, Range);
</span><span class="cx"> 
</span><span class="cx"> private:
</span><del>-    void allocateSuperChunk();
</del><ins>+    void grow();
</ins><span class="cx"> 
</span><span class="cx">     Vector&lt;SmallPage*&gt; m_smallPages;
</span><span class="cx">     Vector&lt;MediumPage*&gt; m_mediumPages;
</span><span class="cx">     SegregatedFreeList m_largeRanges;
</span><ins>+    Vector&lt;SuperChunk*&gt; m_superChunks;
</ins><span class="cx"> };
</span><span class="cx"> 
</span><span class="cx"> inline SmallPage* VMHeap::allocateSmallPage()
</span><span class="cx"> {
</span><span class="cx">     if (!m_smallPages.size())
</span><del>-        allocateSuperChunk();
</del><ins>+        grow();
</ins><span class="cx"> 
</span><span class="cx">     return m_smallPages.pop();
</span><span class="cx"> }
</span><span class="lines">@@ -73,7 +75,7 @@
</span><span class="cx"> inline MediumPage* VMHeap::allocateMediumPage()
</span><span class="cx"> {
</span><span class="cx">     if (!m_mediumPages.size())
</span><del>-        allocateSuperChunk();
</del><ins>+        grow();
</ins><span class="cx"> 
</span><span class="cx">     return m_mediumPages.pop();
</span><span class="cx"> }
</span><span class="lines">@@ -82,7 +84,7 @@
</span><span class="cx"> {
</span><span class="cx">     Range range = m_largeRanges.take(size);
</span><span class="cx">     if (!range) {
</span><del>-        allocateSuperChunk();
</del><ins>+        grow();
</ins><span class="cx">         range = m_largeRanges.take(size);
</span><span class="cx">         BASSERT(range);
</span><span class="cx">     }
</span><span class="lines">@@ -93,7 +95,7 @@
</span><span class="cx"> {
</span><span class="cx">     Range range = m_largeRanges.take(alignment, size, unalignedSize);
</span><span class="cx">     if (!range) {
</span><del>-        allocateSuperChunk();
</del><ins>+        grow();
</ins><span class="cx">         range = m_largeRanges.take(alignment, size, unalignedSize);
</span><span class="cx">         BASSERT(range);
</span><span class="cx">     }
</span></span></pre></div>
<a id="trunkSourcebmallocbmallocxcodeprojprojectpbxproj"></a>
<div class="modfile"><h4>Modified: trunk/Source/bmalloc/bmalloc.xcodeproj/project.pbxproj (180271 => 180272)</h4>
<pre class="diff"><span>
<span class="info">--- trunk/Source/bmalloc/bmalloc.xcodeproj/project.pbxproj        2015-02-18 18:29:00 UTC (rev 180271)
+++ trunk/Source/bmalloc/bmalloc.xcodeproj/project.pbxproj        2015-02-18 19:00:16 UTC (rev 180272)
</span><span class="lines">@@ -15,6 +15,7 @@
</span><span class="cx">                 140FA00519CE4B6800FFD3C8 /* LineMetadata.h in Headers */ = {isa = PBXBuildFile; fileRef = 140FA00419CE4B6800FFD3C8 /* LineMetadata.h */; settings = {ATTRIBUTES = (Private, ); }; };
</span><span class="cx">                 143CB81C19022BC900B16A45 /* StaticMutex.cpp in Sources */ = {isa = PBXBuildFile; fileRef = 143CB81A19022BC900B16A45 /* StaticMutex.cpp */; };
</span><span class="cx">                 143CB81D19022BC900B16A45 /* StaticMutex.h in Headers */ = {isa = PBXBuildFile; fileRef = 143CB81B19022BC900B16A45 /* StaticMutex.h */; settings = {ATTRIBUTES = (Private, ); }; };
</span><ins>+                1440AFC91A95142400837FAA /* SuperChunk.h in Headers */ = {isa = PBXBuildFile; fileRef = 1440AFC81A95142400837FAA /* SuperChunk.h */; settings = {ATTRIBUTES = (Private, ); }; };
</ins><span class="cx">                 1448C30018F3754600502839 /* mbmalloc.cpp in Sources */ = {isa = PBXBuildFile; fileRef = 1448C2FF18F3754300502839 /* mbmalloc.cpp */; };
</span><span class="cx">                 1448C30118F3754C00502839 /* bmalloc.h in Headers */ = {isa = PBXBuildFile; fileRef = 1448C2FE18F3754300502839 /* bmalloc.h */; settings = {ATTRIBUTES = (Private, ); }; };
</span><span class="cx">                 14895D911A3A319C0006235D /* Environment.cpp in Sources */ = {isa = PBXBuildFile; fileRef = 14895D8F1A3A319C0006235D /* Environment.cpp */; };
</span><span class="lines">@@ -90,6 +91,7 @@
</span><span class="cx">                 143CB81B19022BC900B16A45 /* StaticMutex.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; name = StaticMutex.h; path = bmalloc/StaticMutex.h; sourceTree = &quot;&lt;group&gt;&quot;; };
</span><span class="cx">                 143E29E918CAE8BE00FE8A0F /* MediumPage.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; name = MediumPage.h; path = bmalloc/MediumPage.h; sourceTree = &quot;&lt;group&gt;&quot;; };
</span><span class="cx">                 143E29ED18CAE90500FE8A0F /* SmallPage.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; name = SmallPage.h; path = bmalloc/SmallPage.h; sourceTree = &quot;&lt;group&gt;&quot;; };
</span><ins>+                1440AFC81A95142400837FAA /* SuperChunk.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; name = SuperChunk.h; path = bmalloc/SuperChunk.h; sourceTree = &quot;&lt;group&gt;&quot;; };
</ins><span class="cx">                 144469E417A46BFE00F9EA1D /* Cache.cpp */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.cpp.cpp; lineEnding = 0; name = Cache.cpp; path = bmalloc/Cache.cpp; sourceTree = &quot;&lt;group&gt;&quot;; xcLanguageSpecificationIdentifier = xcode.lang.cpp; };
</span><span class="cx">                 144469E517A46BFE00F9EA1D /* Cache.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; lineEnding = 0; name = Cache.h; path = bmalloc/Cache.h; sourceTree = &quot;&lt;group&gt;&quot;; xcLanguageSpecificationIdentifier = xcode.lang.objcpp; };
</span><span class="cx">                 144469FD17A61F1F00F9EA1D /* PerThread.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; lineEnding = 0; name = PerThread.h; path = bmalloc/PerThread.h; sourceTree = &quot;&lt;group&gt;&quot;; xcLanguageSpecificationIdentifier = xcode.lang.objcpp; };
</span><span class="lines">@@ -255,6 +257,7 @@
</span><span class="cx">                                 14105E8318E14374003A106E /* ObjectType.cpp */,
</span><span class="cx">                                 1485656018A43DBA00ED6942 /* ObjectType.h */,
</span><span class="cx">                                 145F6874179DF84100D65598 /* Sizes.h */,
</span><ins>+                                1440AFC81A95142400837FAA /* SuperChunk.h */,
</ins><span class="cx">                                 144F7BFB18BFC517003537F3 /* VMHeap.cpp */,
</span><span class="cx">                                 144F7BFC18BFC517003537F3 /* VMHeap.h */,
</span><span class="cx">                         );
</span><span class="lines">@@ -319,6 +322,7 @@
</span><span class="cx">                                 14DD789018F48CEB00950702 /* Sizes.h in Headers */,
</span><span class="cx">                                 14DD78C718F48D7500950702 /* BAssert.h in Headers */,
</span><span class="cx">                                 14DD78D018F48D7500950702 /* VMAllocate.h in Headers */,
</span><ins>+                                1440AFC91A95142400837FAA /* SuperChunk.h in Headers */,
</ins><span class="cx">                                 14DD78CE18F48D7500950702 /* Syscall.h in Headers */,
</span><span class="cx">                                 14DD78C618F48D7500950702 /* AsyncTask.h in Headers */,
</span><span class="cx">                                 14DD78BA18F48D6B00950702 /* Page.h in Headers */,
</span></span></pre>
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