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<dt>Revision</dt> <dd><a href="http://trac.webkit.org/projects/webkit/changeset/163219">163219</a></dd>
<dt>Author</dt> <dd>lforschler@apple.com</dd>
<dt>Date</dt> <dd>2014-01-31 16:36:31 -0800 (Fri, 31 Jan 2014)</dd>
</dl>
<h3>Log Message</h3>
<pre>Merged <a href="http://trac.webkit.org/projects/webkit/changeset/163214">r163214</a>. <rdar://problem/15939497></pre>
<h3>Modified Paths</h3>
<ul>
<li><a href="#tagsSafari53815SourceJavaScriptCoreChangeLog">tags/Safari-538.15/Source/JavaScriptCore/ChangeLog</a></li>
<li><a href="#tagsSafari53815SourceJavaScriptCoreruntimeInitializeThreadingcpp">tags/Safari-538.15/Source/JavaScriptCore/runtime/InitializeThreading.cpp</a></li>
<li><a href="#tagsSafari53815SourceJavaScriptCoreruntimeJSLockcpp">tags/Safari-538.15/Source/JavaScriptCore/runtime/JSLock.cpp</a></li>
<li><a href="#tagsSafari53815SourceJavaScriptCoreruntimeJSLockh">tags/Safari-538.15/Source/JavaScriptCore/runtime/JSLock.h</a></li>
<li><a href="#tagsSafari53815SourceJavaScriptCoreruntimeVMEntryScopecpp">tags/Safari-538.15/Source/JavaScriptCore/runtime/VMEntryScope.cpp</a></li>
<li><a href="#tagsSafari53815SourceJavaScriptCoreruntimeVMEntryScopeh">tags/Safari-538.15/Source/JavaScriptCore/runtime/VMEntryScope.h</a></li>
<li><a href="#tagsSafari53815SourceWTFChangeLog">tags/Safari-538.15/Source/WTF/ChangeLog</a></li>
<li><a href="#tagsSafari53815SourceWTFwtfWTFThreadDatacpp">tags/Safari-538.15/Source/WTF/wtf/WTFThreadData.cpp</a></li>
<li><a href="#tagsSafari53815SourceWTFwtfWTFThreadDatah">tags/Safari-538.15/Source/WTF/wtf/WTFThreadData.h</a></li>
</ul>
</div>
<div id="patch">
<h3>Diff</h3>
<a id="tagsSafari53815SourceJavaScriptCoreChangeLog"></a>
<div class="modfile"><h4>Modified: tags/Safari-538.15/Source/JavaScriptCore/ChangeLog (163218 => 163219)</h4>
<pre class="diff"><span>
<span class="info">--- tags/Safari-538.15/Source/JavaScriptCore/ChangeLog 2014-02-01 00:34:12 UTC (rev 163218)
+++ tags/Safari-538.15/Source/JavaScriptCore/ChangeLog 2014-02-01 00:36:31 UTC (rev 163219)
</span><span class="lines">@@ -1,3 +1,31 @@
</span><ins>+2014-01-31 Lucas Forschler <lforschler@apple.com>
+
+ Merge r163214
+
+ 2014-01-31 Michael Saboff <msaboff@apple.com>
+
+ REGRESSION: Crash in sanitizeStackForVMImpl when scrolling @ lifehacker.com.au
+ https://bugs.webkit.org/show_bug.cgi?id=128017
+
+ Reviewed by Filip Pizlo.
+
+ Moved the setting and saving of VM::stackPointerAtVMEntry and the corresponding stack limit
+ to JSLock and JSLock::DropAllLocks. The saved data is now stored in per-thread in
+ WTFThreadData.
+
+ * runtime/InitializeThreading.cpp:
+ (JSC::initializeThreading):
+ * runtime/JSLock.cpp:
+ (JSC::JSLock::lock):
+ (JSC::JSLock::unlock):
+ (JSC::JSLock::DropAllLocks::DropAllLocks):
+ (JSC::JSLock::DropAllLocks::~DropAllLocks):
+ * runtime/JSLock.h:
+ * runtime/VMEntryScope.cpp:
+ (JSC::VMEntryScope::VMEntryScope):
+ (JSC::VMEntryScope::~VMEntryScope):
+ * runtime/VMEntryScope.h:
+
</ins><span class="cx"> 2014-01-30 Andreas Kling <akling@apple.com>
</span><span class="cx">
</span><span class="cx"> CodeBlock's cloned SymbolTables only need the captured names.
</span></span></pre></div>
<a id="tagsSafari53815SourceJavaScriptCoreruntimeInitializeThreadingcpp"></a>
<div class="modfile"><h4>Modified: tags/Safari-538.15/Source/JavaScriptCore/runtime/InitializeThreading.cpp (163218 => 163219)</h4>
<pre class="diff"><span>
<span class="info">--- tags/Safari-538.15/Source/JavaScriptCore/runtime/InitializeThreading.cpp 2014-02-01 00:34:12 UTC (rev 163218)
+++ tags/Safari-538.15/Source/JavaScriptCore/runtime/InitializeThreading.cpp 2014-02-01 00:36:31 UTC (rev 163219)
</span><span class="lines">@@ -72,6 +72,10 @@
</span><span class="cx"> #ifndef NDEBUG
</span><span class="cx"> DisallowGC::initialize();
</span><span class="cx"> #endif
</span><ins>+ WTFThreadData& threadData = wtfThreadData();
+
+ threadData.setSavedLastStackTop(threadData.stack().origin());
+ threadData.setSavedReservedZoneSize(Options::reservedZoneSize());
</ins><span class="cx"> });
</span><span class="cx"> }
</span><span class="cx">
</span></span></pre></div>
<a id="tagsSafari53815SourceJavaScriptCoreruntimeJSLockcpp"></a>
<div class="modfile"><h4>Modified: tags/Safari-538.15/Source/JavaScriptCore/runtime/JSLock.cpp (163218 => 163219)</h4>
<pre class="diff"><span>
<span class="info">--- tags/Safari-538.15/Source/JavaScriptCore/runtime/JSLock.cpp 2014-02-01 00:34:12 UTC (rev 163218)
+++ tags/Safari-538.15/Source/JavaScriptCore/runtime/JSLock.cpp 2014-02-01 00:36:31 UTC (rev 163219)
</span><span class="lines">@@ -121,6 +121,16 @@
</span><span class="cx"> m_ownerThread = currentThread;
</span><span class="cx"> ASSERT(!m_lockCount);
</span><span class="cx"> m_lockCount = 1;
</span><ins>+
+ WTFThreadData& threadData = wtfThreadData();
+
+ if (!m_vm->stackPointerAtVMEntry) {
+ entryStackPointer = &holder; // A proxy for the current stack pointer.
+ m_vm->stackPointerAtVMEntry = entryStackPointer;
+ threadData.setSavedReservedZoneSize(m_vm->updateStackLimitWithReservedZoneSize(Options::reservedZoneSize()));
+ }
+
+ m_vm->setLastStackTop(threadData.savedLastStackTop());
</ins><span class="cx"> }
</span><span class="cx"> }
</span><span class="cx">
</span><span class="lines">@@ -131,8 +141,13 @@
</span><span class="cx">
</span><span class="cx"> m_lockCount--;
</span><span class="cx">
</span><del>- if (!m_lockCount)
</del><ins>+ if (!m_lockCount) {
+ if (m_vm && m_vm->stackPointerAtVMEntry == entryStackPointer) {
+ m_vm->stackPointerAtVMEntry = nullptr;
+ m_vm->updateStackLimitWithReservedZoneSize(wtfThreadData().savedReservedZoneSize());
+ }
</ins><span class="cx"> m_lock.unlock();
</span><ins>+ }
</ins><span class="cx"> }
</span><span class="cx">
</span><span class="cx"> void JSLock::lock(ExecState* exec)
</span><span class="lines">@@ -290,8 +305,13 @@
</span><span class="cx"> #if PLATFORM(IOS)
</span><span class="cx"> SpinLockHolder holder(&spinLock);
</span><span class="cx"> #endif
</span><del>- m_savedReservedZoneSize = m_vm->reservedZoneSize();
- m_savedStackPointerAtVMEntry = m_vm->stackPointerAtVMEntry;
</del><ins>+
+ WTFThreadData& threadData = wtfThreadData();
+
+ threadData.setSavedStackPointerAtVMEntry(m_vm->stackPointerAtVMEntry);
+ threadData.setSavedLastStackTop(m_vm->lastStackTop());
+ threadData.setSavedReservedZoneSize(m_vm->reservedZoneSize());
+
</ins><span class="cx"> m_vm->stackPointerAtVMEntry = nullptr;
</span><span class="cx">
</span><span class="cx"> if (alwaysDropLocks)
</span><span class="lines">@@ -310,8 +330,13 @@
</span><span class="cx"> #if PLATFORM(IOS)
</span><span class="cx"> SpinLockHolder holder(&spinLock);
</span><span class="cx"> #endif
</span><del>- m_savedReservedZoneSize = m_vm->reservedZoneSize();
- m_savedStackPointerAtVMEntry = m_vm->stackPointerAtVMEntry;
</del><ins>+
+ WTFThreadData& threadData = wtfThreadData();
+
+ threadData.setSavedStackPointerAtVMEntry(m_vm->stackPointerAtVMEntry);
+ threadData.setSavedLastStackTop(m_vm->lastStackTop());
+ threadData.setSavedReservedZoneSize(m_vm->reservedZoneSize());
+
</ins><span class="cx"> m_vm->stackPointerAtVMEntry = nullptr;
</span><span class="cx">
</span><span class="cx"> if (alwaysDropLocks)
</span><span class="lines">@@ -330,8 +355,11 @@
</span><span class="cx"> #endif
</span><span class="cx"> m_vm->apiLock().grabAllLocks(m_lockCount, spinLock);
</span><span class="cx">
</span><del>- m_vm->stackPointerAtVMEntry = m_savedStackPointerAtVMEntry;
- m_vm->updateStackLimitWithReservedZoneSize(m_savedReservedZoneSize);
</del><ins>+ WTFThreadData& threadData = wtfThreadData();
+
+ m_vm->stackPointerAtVMEntry = threadData.savedStackPointerAtVMEntry();
+ m_vm->setLastStackTop(threadData.savedLastStackTop());
+ m_vm->updateStackLimitWithReservedZoneSize(threadData.savedReservedZoneSize());
</ins><span class="cx"> }
</span><span class="cx">
</span><span class="cx"> } // namespace JSC
</span></span></pre></div>
<a id="tagsSafari53815SourceJavaScriptCoreruntimeJSLockh"></a>
<div class="modfile"><h4>Modified: tags/Safari-538.15/Source/JavaScriptCore/runtime/JSLock.h (163218 => 163219)</h4>
<pre class="diff"><span>
<span class="info">--- tags/Safari-538.15/Source/JavaScriptCore/runtime/JSLock.h 2014-02-01 00:34:12 UTC (rev 163218)
+++ tags/Safari-538.15/Source/JavaScriptCore/runtime/JSLock.h 2014-02-01 00:36:31 UTC (rev 163219)
</span><span class="lines">@@ -110,8 +110,6 @@
</span><span class="cx"> private:
</span><span class="cx"> intptr_t m_lockCount;
</span><span class="cx"> RefPtr<VM> m_vm;
</span><del>- size_t m_savedReservedZoneSize;
- void* m_savedStackPointerAtVMEntry;
</del><span class="cx"> };
</span><span class="cx">
</span><span class="cx"> private:
</span><span class="lines">@@ -125,6 +123,7 @@
</span><span class="cx"> intptr_t m_lockCount;
</span><span class="cx"> unsigned m_lockDropDepth;
</span><span class="cx"> VM* m_vm;
</span><ins>+ void* entryStackPointer;
</ins><span class="cx"> };
</span><span class="cx">
</span><span class="cx"> } // namespace
</span></span></pre></div>
<a id="tagsSafari53815SourceJavaScriptCoreruntimeVMEntryScopecpp"></a>
<div class="modfile"><h4>Modified: tags/Safari-538.15/Source/JavaScriptCore/runtime/VMEntryScope.cpp (163218 => 163219)</h4>
<pre class="diff"><span>
<span class="info">--- tags/Safari-538.15/Source/JavaScriptCore/runtime/VMEntryScope.cpp 2014-02-01 00:34:12 UTC (rev 163218)
+++ tags/Safari-538.15/Source/JavaScriptCore/runtime/VMEntryScope.cpp 2014-02-01 00:36:31 UTC (rev 163219)
</span><span class="lines">@@ -51,31 +51,20 @@
</span><span class="cx"> vm.resetDateCache();
</span><span class="cx"> }
</span><span class="cx">
</span><del>- if (!vm.stackPointerAtVMEntry) {
- vm.stackPointerAtVMEntry = this;
- m_savedReservedZoneSize = vm.updateStackLimitWithReservedZoneSize(Options::reservedZoneSize());
- }
-
</del><span class="cx"> // Clear the captured exception stack between entries
</span><span class="cx"> vm.clearExceptionStack();
</span><span class="cx"> }
</span><span class="cx">
</span><span class="cx"> VMEntryScope::~VMEntryScope()
</span><span class="cx"> {
</span><del>- if (m_vm.entryScope == this)
- m_vm.entryScope = nullptr;
- if (m_vm.stackPointerAtVMEntry == this) {
- m_vm.stackPointerAtVMEntry = nullptr;
- m_vm.updateStackLimitWithReservedZoneSize(m_savedReservedZoneSize);
- }
</del><ins>+ if (m_vm.entryScope != this)
+ return;
</ins><span class="cx">
</span><ins>+ m_vm.entryScope = nullptr;
+
</ins><span class="cx"> if (m_recompilationNeeded) {
</span><del>- if (m_vm.entryScope)
- m_vm.entryScope->setRecompilationNeeded(true);
- else {
- if (Debugger* debugger = m_globalObject->debugger())
- debugger->recompileAllJSFunctions(&m_vm);
- }
</del><ins>+ if (Debugger* debugger = m_globalObject->debugger())
+ debugger->recompileAllJSFunctions(&m_vm);
</ins><span class="cx"> }
</span><span class="cx"> }
</span><span class="cx">
</span></span></pre></div>
<a id="tagsSafari53815SourceJavaScriptCoreruntimeVMEntryScopeh"></a>
<div class="modfile"><h4>Modified: tags/Safari-538.15/Source/JavaScriptCore/runtime/VMEntryScope.h (163218 => 163219)</h4>
<pre class="diff"><span>
<span class="info">--- tags/Safari-538.15/Source/JavaScriptCore/runtime/VMEntryScope.h 2014-02-01 00:34:12 UTC (rev 163218)
+++ tags/Safari-538.15/Source/JavaScriptCore/runtime/VMEntryScope.h 2014-02-01 00:36:31 UTC (rev 163219)
</span><span class="lines">@@ -46,13 +46,10 @@
</span><span class="cx">
</span><span class="cx"> private:
</span><span class="cx"> VM& m_vm;
</span><del>- StackStats::CheckPoint m_stackCheckPoint;
</del><span class="cx"> JSGlobalObject* m_globalObject;
</span><del>- size_t m_savedReservedZoneSize;
</del><span class="cx"> bool m_recompilationNeeded;
</span><span class="cx"> };
</span><span class="cx">
</span><span class="cx"> } // namespace JSC
</span><span class="cx">
</span><span class="cx"> #endif // VMEntryScope_h
</span><del>-
</del></span></pre></div>
<a id="tagsSafari53815SourceWTFChangeLog"></a>
<div class="modfile"><h4>Modified: tags/Safari-538.15/Source/WTF/ChangeLog (163218 => 163219)</h4>
<pre class="diff"><span>
<span class="info">--- tags/Safari-538.15/Source/WTF/ChangeLog 2014-02-01 00:34:12 UTC (rev 163218)
+++ tags/Safari-538.15/Source/WTF/ChangeLog 2014-02-01 00:36:31 UTC (rev 163219)
</span><span class="lines">@@ -1,3 +1,28 @@
</span><ins>+2014-01-31 Lucas Forschler <lforschler@apple.com>
+
+ Merge r163214
+
+ 2014-01-31 Michael Saboff <msaboff@apple.com>
+
+ REGRESSION: Crash in sanitizeStackForVMImpl when scrolling @ lifehacker.com.au
+ https://bugs.webkit.org/show_bug.cgi?id=128017
+
+ Reviewed by Filip Pizlo.
+
+ Moved the setting and saving of VM::stackPointerAtVMEntry and the corresponding stack limit
+ to JSLock and JSLock::DropAllLocks. The saved data is now stored in per-thread in
+ WTFThreadData.
+
+ * wtf/WTFThreadData.cpp:
+ (WTF::WTFThreadData::WTFThreadData):
+ * wtf/WTFThreadData.h:
+ (WTF::WTFThreadData::savedStackPointerAtVMEntry):
+ (WTF::WTFThreadData::setSavedStackPointerAtVMEntry):
+ (WTF::WTFThreadData::savedLastStackTop):
+ (WTF::WTFThreadData::setSavedLastStackTop):
+ (WTF::WTFThreadData::savedReservedZoneSize):
+ (WTF::WTFThreadData::setSavedReservedZoneSize):
+
</ins><span class="cx"> 2014-01-30 Andrei Bucur <abucur@adobe.com>
</span><span class="cx">
</span><span class="cx"> Remove the ACCELERATED_COMPOSITING flag
</span></span></pre></div>
<a id="tagsSafari53815SourceWTFwtfWTFThreadDatacpp"></a>
<div class="modfile"><h4>Modified: tags/Safari-538.15/Source/WTF/wtf/WTFThreadData.cpp (163218 => 163219)</h4>
<pre class="diff"><span>
<span class="info">--- tags/Safari-538.15/Source/WTF/wtf/WTFThreadData.cpp 2014-02-01 00:34:12 UTC (rev 163218)
+++ tags/Safari-538.15/Source/WTF/wtf/WTFThreadData.cpp 2014-02-01 00:36:31 UTC (rev 163219)
</span><span class="lines">@@ -49,6 +49,9 @@
</span><span class="cx"> #if ENABLE(STACK_STATS)
</span><span class="cx"> , m_stackStats()
</span><span class="cx"> #endif
</span><ins>+ , m_savedStackPointerAtVMEntry(0)
+ , m_savedLastStackTop(stack().origin())
+ , m_savedReservedZoneSize(0)
</ins><span class="cx"> {
</span><span class="cx"> #if USE(WEB_THREAD)
</span><span class="cx"> static JSC::IdentifierTable* sharedIdentifierTable = new JSC::IdentifierTable();
</span></span></pre></div>
<a id="tagsSafari53815SourceWTFwtfWTFThreadDatah"></a>
<div class="modfile"><h4>Modified: tags/Safari-538.15/Source/WTF/wtf/WTFThreadData.h (163218 => 163219)</h4>
<pre class="diff"><span>
<span class="info">--- tags/Safari-538.15/Source/WTF/wtf/WTFThreadData.h 2014-02-01 00:34:12 UTC (rev 163218)
+++ tags/Safari-538.15/Source/WTF/wtf/WTFThreadData.h 2014-02-01 00:36:31 UTC (rev 163219)
</span><span class="lines">@@ -106,6 +106,36 @@
</span><span class="cx"> }
</span><span class="cx"> #endif
</span><span class="cx">
</span><ins>+ void* savedStackPointerAtVMEntry()
+ {
+ return m_savedStackPointerAtVMEntry;
+ }
+
+ void setSavedStackPointerAtVMEntry(void* stackPointerAtVMEntry)
+ {
+ m_savedStackPointerAtVMEntry = stackPointerAtVMEntry;
+ }
+
+ void* savedLastStackTop()
+ {
+ return m_savedLastStackTop;
+ }
+
+ void setSavedLastStackTop(void* lastStackTop)
+ {
+ m_savedLastStackTop = lastStackTop;
+ }
+
+ size_t savedReservedZoneSize()
+ {
+ return m_savedReservedZoneSize;
+ }
+
+ void setSavedReservedZoneSize(size_t reservedZoneSize)
+ {
+ m_savedReservedZoneSize = reservedZoneSize;
+ }
+
</ins><span class="cx"> void* m_apiData;
</span><span class="cx">
</span><span class="cx"> private:
</span><span class="lines">@@ -118,6 +148,9 @@
</span><span class="cx"> #if ENABLE(STACK_STATS)
</span><span class="cx"> StackStats::PerThreadStats m_stackStats;
</span><span class="cx"> #endif
</span><ins>+ void* m_savedStackPointerAtVMEntry;
+ void* m_savedLastStackTop;
+ size_t m_savedReservedZoneSize;
</ins><span class="cx">
</span><span class="cx"> static WTF_EXPORTDATA ThreadSpecific<WTFThreadData>* staticData;
</span><span class="cx"> friend WTFThreadData& wtfThreadData();
</span></span></pre>
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