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<dt>Revision</dt> <dd><a href="http://trac.webkit.org/projects/webkit/changeset/184076">184076</a></dd>
<dt>Author</dt> <dd>carlosgc@webkit.org</dd>
<dt>Date</dt> <dd>2015-05-11 04:04:08 -0700 (Mon, 11 May 2015)</dd>
</dl>
<h3>Log Message</h3>
<pre>Merge <a href="http://trac.webkit.org/projects/webkit/changeset/182827">r182827</a> - DFG register fillSpeculate*() functions should validate incoming spill format is compatible with requested fill format
https://bugs.webkit.org/show_bug.cgi?id=143727
Reviewed by Geoffrey Garen.
Used the result of AbstractInterpreter<>::filter() to check that the current spill format is compatible
with the requested fill format. If filter() reports a contradiction, then we force an OSR exit.
Removed individual checks made redundant by the new check.
* dfg/DFGSpeculativeJIT32_64.cpp:
(JSC::DFG::SpeculativeJIT::fillSpeculateInt32Internal):
(JSC::DFG::SpeculativeJIT::fillSpeculateCell):
(JSC::DFG::SpeculativeJIT::fillSpeculateBoolean):
* dfg/DFGSpeculativeJIT64.cpp:
(JSC::DFG::SpeculativeJIT::fillSpeculateInt32Internal):
(JSC::DFG::SpeculativeJIT::fillSpeculateInt52):
(JSC::DFG::SpeculativeJIT::fillSpeculateCell):
(JSC::DFG::SpeculativeJIT::fillSpeculateBoolean):</pre>
<h3>Modified Paths</h3>
<ul>
<li><a href="#releasesWebKitGTKwebkit28SourceJavaScriptCoreChangeLog">releases/WebKitGTK/webkit-2.8/Source/JavaScriptCore/ChangeLog</a></li>
<li><a href="#releasesWebKitGTKwebkit28SourceJavaScriptCoredfgDFGSpeculativeJIT32_64cpp">releases/WebKitGTK/webkit-2.8/Source/JavaScriptCore/dfg/DFGSpeculativeJIT32_64.cpp</a></li>
<li><a href="#releasesWebKitGTKwebkit28SourceJavaScriptCoredfgDFGSpeculativeJIT64cpp">releases/WebKitGTK/webkit-2.8/Source/JavaScriptCore/dfg/DFGSpeculativeJIT64.cpp</a></li>
</ul>
</div>
<div id="patch">
<h3>Diff</h3>
<a id="releasesWebKitGTKwebkit28SourceJavaScriptCoreChangeLog"></a>
<div class="modfile"><h4>Modified: releases/WebKitGTK/webkit-2.8/Source/JavaScriptCore/ChangeLog (184075 => 184076)</h4>
<pre class="diff"><span>
<span class="info">--- releases/WebKitGTK/webkit-2.8/Source/JavaScriptCore/ChangeLog 2015-05-11 11:04:07 UTC (rev 184075)
+++ releases/WebKitGTK/webkit-2.8/Source/JavaScriptCore/ChangeLog 2015-05-11 11:04:08 UTC (rev 184076)
</span><span class="lines">@@ -1,3 +1,24 @@
</span><ins>+2015-04-14 Michael Saboff <msaboff@apple.com>
+
+ DFG register fillSpeculate*() functions should validate incoming spill format is compatible with requested fill format
+ https://bugs.webkit.org/show_bug.cgi?id=143727
+
+ Reviewed by Geoffrey Garen.
+
+ Used the result of AbstractInterpreter<>::filter() to check that the current spill format is compatible
+ with the requested fill format. If filter() reports a contradiction, then we force an OSR exit.
+ Removed individual checks made redundant by the new check.
+
+ * dfg/DFGSpeculativeJIT32_64.cpp:
+ (JSC::DFG::SpeculativeJIT::fillSpeculateInt32Internal):
+ (JSC::DFG::SpeculativeJIT::fillSpeculateCell):
+ (JSC::DFG::SpeculativeJIT::fillSpeculateBoolean):
+ * dfg/DFGSpeculativeJIT64.cpp:
+ (JSC::DFG::SpeculativeJIT::fillSpeculateInt32Internal):
+ (JSC::DFG::SpeculativeJIT::fillSpeculateInt52):
+ (JSC::DFG::SpeculativeJIT::fillSpeculateCell):
+ (JSC::DFG::SpeculativeJIT::fillSpeculateBoolean):
+
</ins><span class="cx"> 2015-04-10 Csaba Osztrogonác <ossy@webkit.org>
</span><span class="cx">
</span><span class="cx"> [ARM] Fix calleeSaveRegisters() on non iOS platforms after r180516
</span></span></pre></div>
<a id="releasesWebKitGTKwebkit28SourceJavaScriptCoredfgDFGSpeculativeJIT32_64cpp"></a>
<div class="modfile"><h4>Modified: releases/WebKitGTK/webkit-2.8/Source/JavaScriptCore/dfg/DFGSpeculativeJIT32_64.cpp (184075 => 184076)</h4>
<pre class="diff"><span>
<span class="info">--- releases/WebKitGTK/webkit-2.8/Source/JavaScriptCore/dfg/DFGSpeculativeJIT32_64.cpp 2015-05-11 11:04:07 UTC (rev 184075)
+++ releases/WebKitGTK/webkit-2.8/Source/JavaScriptCore/dfg/DFGSpeculativeJIT32_64.cpp 2015-05-11 11:04:08 UTC (rev 184076)
</span><span class="lines">@@ -732,16 +732,16 @@
</span><span class="cx"> AbstractValue& value = m_state.forNode(edge);
</span><span class="cx"> SpeculatedType type = value.m_type;
</span><span class="cx"> ASSERT(edge.useKind() != KnownInt32Use || !(value.m_type & ~SpecInt32));
</span><del>- m_interpreter.filter(value, SpecInt32);
- VirtualRegister virtualRegister = edge->virtualRegister();
- GenerationInfo& info = generationInfoFromVirtualRegister(virtualRegister);
</del><span class="cx">
</span><del>- if (edge->hasConstant() && !edge->isInt32Constant()) {
</del><ins>+ if (m_interpreter.filter(value, SpecInt32) == Contradiction) {
</ins><span class="cx"> terminateSpeculativeExecution(Uncountable, JSValueRegs(), 0);
</span><span class="cx"> returnFormat = DataFormatInt32;
</span><span class="cx"> return allocate();
</span><span class="cx"> }
</span><del>-
</del><ins>+
+ VirtualRegister virtualRegister = edge->virtualRegister();
+ GenerationInfo& info = generationInfoFromVirtualRegister(virtualRegister);
+
</ins><span class="cx"> switch (info.registerFormat()) {
</span><span class="cx"> case DataFormatNone: {
</span><span class="cx"> if (edge->hasConstant()) {
</span><span class="lines">@@ -756,12 +756,6 @@
</span><span class="cx">
</span><span class="cx"> DataFormat spillFormat = info.spillFormat();
</span><span class="cx">
</span><del>- if (spillFormat == DataFormatCell) {
- terminateSpeculativeExecution(BadType, JSValueRegs(), edge);
- returnFormat = DataFormatInt32;
- return allocate();
- }
-
</del><span class="cx"> ASSERT_UNUSED(spillFormat, (spillFormat & DataFormatJS) || spillFormat == DataFormatInt32);
</span><span class="cx">
</span><span class="cx"> // If we know this was spilled as an integer we can fill without checking.
</span><span class="lines">@@ -807,10 +801,6 @@
</span><span class="cx"> case DataFormatJSDouble:
</span><span class="cx"> case DataFormatJSCell:
</span><span class="cx"> case DataFormatJSBoolean:
</span><del>- terminateSpeculativeExecution(Uncountable, JSValueRegs(), 0);
- returnFormat = DataFormatInt32;
- return allocate();
-
</del><span class="cx"> case DataFormatDouble:
</span><span class="cx"> case DataFormatStorage:
</span><span class="cx"> default:
</span><span class="lines">@@ -869,26 +859,17 @@
</span><span class="cx"> AbstractValue& value = m_state.forNode(edge);
</span><span class="cx"> SpeculatedType type = value.m_type;
</span><span class="cx"> ASSERT((edge.useKind() != KnownCellUse && edge.useKind() != KnownStringUse) || !(value.m_type & ~SpecCell));
</span><del>- m_interpreter.filter(value, SpecCell);
- VirtualRegister virtualRegister = edge->virtualRegister();
- GenerationInfo& info = generationInfoFromVirtualRegister(virtualRegister);
-
- if (edge->hasConstant() && !edge->isCellConstant()) {
- // Protect the silent spill/fill logic by failing early. If we "speculate" on
- // the constant then the silent filler may think that we have a cell and a
- // constant, so it will try to fill this as an cell constant. Bad things will
- // happen.
</del><ins>+
+ if (m_interpreter.filter(value, SpecCell) == Contradiction) {
</ins><span class="cx"> terminateSpeculativeExecution(Uncountable, JSValueRegs(), 0);
</span><span class="cx"> return allocate();
</span><span class="cx"> }
</span><span class="cx">
</span><ins>+ VirtualRegister virtualRegister = edge->virtualRegister();
+ GenerationInfo& info = generationInfoFromVirtualRegister(virtualRegister);
+
</ins><span class="cx"> switch (info.registerFormat()) {
</span><span class="cx"> case DataFormatNone: {
</span><del>- if (info.spillFormat() == DataFormatInt32) {
- terminateSpeculativeExecution(Uncountable, JSValueRegs(), 0);
- return allocate();
- }
-
</del><span class="cx"> if (edge->hasConstant()) {
</span><span class="cx"> JSValue jsValue = edge->asJSValue();
</span><span class="cx"> GPRReg gpr = allocate();
</span><span class="lines">@@ -946,9 +927,6 @@
</span><span class="cx"> case DataFormatJSDouble:
</span><span class="cx"> case DataFormatJSBoolean:
</span><span class="cx"> case DataFormatBoolean:
</span><del>- terminateSpeculativeExecution(Uncountable, JSValueRegs(), 0);
- return allocate();
-
</del><span class="cx"> case DataFormatDouble:
</span><span class="cx"> case DataFormatStorage:
</span><span class="cx"> RELEASE_ASSERT_NOT_REACHED();
</span><span class="lines">@@ -963,27 +941,23 @@
</span><span class="cx"> {
</span><span class="cx"> AbstractValue& value = m_state.forNode(edge);
</span><span class="cx"> SpeculatedType type = value.m_type;
</span><del>- m_interpreter.filter(value, SpecBoolean);
</del><ins>+
+ if (m_interpreter.filter(value, SpecBoolean) == Contradiction) {
+ terminateSpeculativeExecution(Uncountable, JSValueRegs(), 0);
+ return allocate();
+ }
+
</ins><span class="cx"> VirtualRegister virtualRegister = edge->virtualRegister();
</span><span class="cx"> GenerationInfo& info = generationInfoFromVirtualRegister(virtualRegister);
</span><span class="cx">
</span><span class="cx"> switch (info.registerFormat()) {
</span><span class="cx"> case DataFormatNone: {
</span><del>- if (info.spillFormat() == DataFormatInt32) {
- terminateSpeculativeExecution(Uncountable, JSValueRegs(), 0);
- return allocate();
- }
-
</del><span class="cx"> if (edge->hasConstant()) {
</span><span class="cx"> JSValue jsValue = edge->asJSValue();
</span><span class="cx"> GPRReg gpr = allocate();
</span><del>- if (jsValue.isBoolean()) {
- m_gprs.retain(gpr, virtualRegister, SpillOrderConstant);
- m_jit.move(MacroAssembler::TrustedImm32(jsValue.asBoolean()), gpr);
- info.fillBoolean(*m_stream, gpr);
- return gpr;
- }
- terminateSpeculativeExecution(Uncountable, JSValueRegs(), 0);
</del><ins>+ m_gprs.retain(gpr, virtualRegister, SpillOrderConstant);
+ m_jit.move(MacroAssembler::TrustedImm32(jsValue.asBoolean()), gpr);
+ info.fillBoolean(*m_stream, gpr);
</ins><span class="cx"> return gpr;
</span><span class="cx"> }
</span><span class="cx">
</span><span class="lines">@@ -1027,9 +1001,6 @@
</span><span class="cx"> case DataFormatJSDouble:
</span><span class="cx"> case DataFormatJSCell:
</span><span class="cx"> case DataFormatCell:
</span><del>- terminateSpeculativeExecution(Uncountable, JSValueRegs(), 0);
- return allocate();
-
</del><span class="cx"> case DataFormatDouble:
</span><span class="cx"> case DataFormatStorage:
</span><span class="cx"> RELEASE_ASSERT_NOT_REACHED();
</span></span></pre></div>
<a id="releasesWebKitGTKwebkit28SourceJavaScriptCoredfgDFGSpeculativeJIT64cpp"></a>
<div class="modfile"><h4>Modified: releases/WebKitGTK/webkit-2.8/Source/JavaScriptCore/dfg/DFGSpeculativeJIT64.cpp (184075 => 184076)</h4>
<pre class="diff"><span>
<span class="info">--- releases/WebKitGTK/webkit-2.8/Source/JavaScriptCore/dfg/DFGSpeculativeJIT64.cpp 2015-05-11 11:04:07 UTC (rev 184075)
+++ releases/WebKitGTK/webkit-2.8/Source/JavaScriptCore/dfg/DFGSpeculativeJIT64.cpp 2015-05-11 11:04:08 UTC (rev 184076)
</span><span class="lines">@@ -708,20 +708,16 @@
</span><span class="cx"> AbstractValue& value = m_state.forNode(edge);
</span><span class="cx"> SpeculatedType type = value.m_type;
</span><span class="cx"> ASSERT(edge.useKind() != KnownInt32Use || !(value.m_type & ~SpecInt32));
</span><del>- m_interpreter.filter(value, SpecInt32);
- VirtualRegister virtualRegister = edge->virtualRegister();
- GenerationInfo& info = generationInfoFromVirtualRegister(virtualRegister);
</del><span class="cx">
</span><del>- if (edge->hasConstant() && !edge->isInt32Constant()) {
- // Protect the silent spill/fill logic by failing early. If we "speculate" on
- // the constant then the silent filler may think that we have an int32 and a
- // constant, so it will try to fill this as an int32 constant. Bad things will
- // happen.
</del><ins>+ if (m_interpreter.filter(value, SpecInt32) == Contradiction) {
</ins><span class="cx"> terminateSpeculativeExecution(Uncountable, JSValueRegs(), 0);
</span><span class="cx"> returnFormat = DataFormatInt32;
</span><span class="cx"> return allocate();
</span><span class="cx"> }
</span><del>-
</del><ins>+
+ VirtualRegister virtualRegister = edge->virtualRegister();
+ GenerationInfo& info = generationInfoFromVirtualRegister(virtualRegister);
+
</ins><span class="cx"> switch (info.registerFormat()) {
</span><span class="cx"> case DataFormatNone: {
</span><span class="cx"> GPRReg gpr = allocate();
</span><span class="lines">@@ -820,12 +816,7 @@
</span><span class="cx"> case DataFormatCell:
</span><span class="cx"> case DataFormatBoolean:
</span><span class="cx"> case DataFormatJSCell:
</span><del>- case DataFormatJSBoolean: {
- terminateSpeculativeExecution(Uncountable, JSValueRegs(), 0);
- returnFormat = DataFormatInt32;
- return allocate();
- }
-
</del><ins>+ case DataFormatJSBoolean:
</ins><span class="cx"> case DataFormatDouble:
</span><span class="cx"> case DataFormatStorage:
</span><span class="cx"> case DataFormatInt52:
</span><span class="lines">@@ -858,17 +849,17 @@
</span><span class="cx"> {
</span><span class="cx"> ASSERT(desiredFormat == DataFormatInt52 || desiredFormat == DataFormatStrictInt52);
</span><span class="cx"> AbstractValue& value = m_state.forNode(edge);
</span><del>- m_interpreter.filter(value, SpecMachineInt);
</del><ins>+
+ if (m_interpreter.filter(value, SpecMachineInt) == Contradiction) {
+ terminateSpeculativeExecution(Uncountable, JSValueRegs(), 0);
+ return allocate();
+ }
+
</ins><span class="cx"> VirtualRegister virtualRegister = edge->virtualRegister();
</span><span class="cx"> GenerationInfo& info = generationInfoFromVirtualRegister(virtualRegister);
</span><span class="cx">
</span><span class="cx"> switch (info.registerFormat()) {
</span><span class="cx"> case DataFormatNone: {
</span><del>- if (edge->hasConstant() && !edge->isMachineIntConstant()) {
- terminateSpeculativeExecution(Uncountable, JSValueRegs(), 0);
- return allocate();
- }
-
</del><span class="cx"> GPRReg gpr = allocate();
</span><span class="cx">
</span><span class="cx"> if (edge->hasConstant()) {
</span><span class="lines">@@ -987,16 +978,15 @@
</span><span class="cx"> AbstractValue& value = m_state.forNode(edge);
</span><span class="cx"> SpeculatedType type = value.m_type;
</span><span class="cx"> ASSERT((edge.useKind() != KnownCellUse && edge.useKind() != KnownStringUse) || !(value.m_type & ~SpecCell));
</span><del>- m_interpreter.filter(value, SpecCell);
- VirtualRegister virtualRegister = edge->virtualRegister();
- GenerationInfo& info = generationInfoFromVirtualRegister(virtualRegister);
</del><span class="cx">
</span><del>- if (edge->hasConstant() && !edge->isCellConstant()) {
- // Better to fail early on constants.
</del><ins>+ if (m_interpreter.filter(value, SpecCell) == Contradiction) {
</ins><span class="cx"> terminateSpeculativeExecution(Uncountable, JSValueRegs(), 0);
</span><span class="cx"> return allocate();
</span><span class="cx"> }
</span><span class="cx">
</span><ins>+ VirtualRegister virtualRegister = edge->virtualRegister();
+ GenerationInfo& info = generationInfoFromVirtualRegister(virtualRegister);
+
</ins><span class="cx"> switch (info.registerFormat()) {
</span><span class="cx"> case DataFormatNone: {
</span><span class="cx"> GPRReg gpr = allocate();
</span><span class="lines">@@ -1008,12 +998,7 @@
</span><span class="cx"> info.fillJSValue(*m_stream, gpr, DataFormatJSCell);
</span><span class="cx"> return gpr;
</span><span class="cx"> }
</span><del>-
- if (!(info.spillFormat() & DataFormatJS)) {
- terminateSpeculativeExecution(Uncountable, JSValueRegs(), 0);
- return gpr;
- }
-
</del><ins>+
</ins><span class="cx"> m_gprs.retain(gpr, virtualRegister, SpillOrderSpilled);
</span><span class="cx"> m_jit.load64(JITCompiler::addressFor(virtualRegister), gpr);
</span><span class="cx">
</span><span class="lines">@@ -1049,11 +1034,7 @@
</span><span class="cx"> case DataFormatInt32:
</span><span class="cx"> case DataFormatJSDouble:
</span><span class="cx"> case DataFormatJSBoolean:
</span><del>- case DataFormatBoolean: {
- terminateSpeculativeExecution(Uncountable, JSValueRegs(), 0);
- return allocate();
- }
-
</del><ins>+ case DataFormatBoolean:
</ins><span class="cx"> case DataFormatDouble:
</span><span class="cx"> case DataFormatStorage:
</span><span class="cx"> case DataFormatInt52:
</span><span class="lines">@@ -1070,28 +1051,24 @@
</span><span class="cx"> {
</span><span class="cx"> AbstractValue& value = m_state.forNode(edge);
</span><span class="cx"> SpeculatedType type = value.m_type;
</span><del>- m_interpreter.filter(value, SpecBoolean);
</del><ins>+
+ if (m_interpreter.filter(value, SpecBoolean) == Contradiction) {
+ terminateSpeculativeExecution(Uncountable, JSValueRegs(), 0);
+ return allocate();
+ }
+
</ins><span class="cx"> VirtualRegister virtualRegister = edge->virtualRegister();
</span><span class="cx"> GenerationInfo& info = generationInfoFromVirtualRegister(virtualRegister);
</span><span class="cx">
</span><span class="cx"> switch (info.registerFormat()) {
</span><span class="cx"> case DataFormatNone: {
</span><del>- if (info.spillFormat() == DataFormatInt32) {
- terminateSpeculativeExecution(Uncountable, JSValueRegs(), 0);
- return allocate();
- }
-
</del><span class="cx"> GPRReg gpr = allocate();
</span><span class="cx">
</span><span class="cx"> if (edge->hasConstant()) {
</span><span class="cx"> JSValue jsValue = edge->asJSValue();
</span><del>- if (jsValue.isBoolean()) {
- m_gprs.retain(gpr, virtualRegister, SpillOrderConstant);
- m_jit.move(MacroAssembler::TrustedImm64(JSValue::encode(jsValue)), gpr);
- info.fillJSValue(*m_stream, gpr, DataFormatJSBoolean);
- return gpr;
- }
- terminateSpeculativeExecution(Uncountable, JSValueRegs(), 0);
</del><ins>+ m_gprs.retain(gpr, virtualRegister, SpillOrderConstant);
+ m_jit.move(MacroAssembler::TrustedImm64(JSValue::encode(jsValue)), gpr);
+ info.fillJSValue(*m_stream, gpr, DataFormatJSBoolean);
</ins><span class="cx"> return gpr;
</span><span class="cx"> }
</span><span class="cx"> DFG_ASSERT(m_jit.graph(), m_currentNode, info.spillFormat() & DataFormatJS);
</span><span class="lines">@@ -1132,9 +1109,6 @@
</span><span class="cx"> case DataFormatJSDouble:
</span><span class="cx"> case DataFormatJSCell:
</span><span class="cx"> case DataFormatCell:
</span><del>- terminateSpeculativeExecution(Uncountable, JSValueRegs(), 0);
- return allocate();
-
</del><span class="cx"> case DataFormatDouble:
</span><span class="cx"> case DataFormatStorage:
</span><span class="cx"> case DataFormatInt52:
</span></span></pre>
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