Diff
Modified: trunk/Source/_javascript_Core/ChangeLog (104348 => 104349)
--- trunk/Source/_javascript_Core/ChangeLog 2012-01-06 23:16:52 UTC (rev 104348)
+++ trunk/Source/_javascript_Core/ChangeLog 2012-01-06 23:20:48 UTC (rev 104349)
@@ -1,3 +1,24 @@
+2012-01-06 Filip Pizlo <fpi...@apple.com>
+
+ JIT stub slow paths that would be identical to that of an interpreter should be factored out
+ https://bugs.webkit.org/show_bug.cgi?id=75743
+ <rdar://problem/10657024>
+
+ Reviewed by Geoff Garen.
+
+ * GNUmakefile.list.am:
+ * _javascript_Core.vcproj/_javascript_Core/_javascript_Core.vcproj:
+ * _javascript_Core.xcodeproj/project.pbxproj:
+ * jit/JITStubs.cpp:
+ (JSC::DEFINE_STUB_FUNCTION):
+ * runtime/CommonSlowPaths.h: Added.
+ (JSC::CommonSlowPaths::opInstanceOfSlow):
+ (JSC::CommonSlowPaths::opIn):
+ (JSC::CommonSlowPaths::opResolve):
+ (JSC::CommonSlowPaths::opResolveSkip):
+ (JSC::CommonSlowPaths::opResolveWithBase):
+ (JSC::CommonSlowPaths::opResolveWithThis):
+
2012-01-06 Sam Weinig <s...@webkit.org>
Fix windows build.
Modified: trunk/Source/_javascript_Core/GNUmakefile.list.am (104348 => 104349)
--- trunk/Source/_javascript_Core/GNUmakefile.list.am 2012-01-06 23:16:52 UTC (rev 104348)
+++ trunk/Source/_javascript_Core/GNUmakefile.list.am 2012-01-06 23:20:48 UTC (rev 104349)
@@ -325,6 +325,7 @@
Source/_javascript_Core/runtime/ClassInfo.h \
Source/_javascript_Core/runtime/CommonIdentifiers.cpp \
Source/_javascript_Core/runtime/CommonIdentifiers.h \
+ Source/_javascript_Core/runtime/CommonSlowPaths.h \
Source/_javascript_Core/runtime/Completion.cpp \
Source/_javascript_Core/runtime/Completion.h \
Source/_javascript_Core/runtime/ConstructData.cpp \
Modified: trunk/Source/_javascript_Core/_javascript_Core.vcproj/_javascript_Core/_javascript_Core.vcproj (104348 => 104349)
--- trunk/Source/_javascript_Core/_javascript_Core.vcproj/_javascript_Core/_javascript_Core.vcproj 2012-01-06 23:16:52 UTC (rev 104348)
+++ trunk/Source/_javascript_Core/_javascript_Core.vcproj/_javascript_Core/_javascript_Core.vcproj 2012-01-06 23:20:48 UTC (rev 104349)
@@ -594,6 +594,10 @@
>
</File>
<File
+ RelativePath="..\..\runtime\CommonSlowPaths.h"
+ >
+ </File>
+ <File
RelativePath="..\..\runtime\Completion.cpp"
>
</File>
Modified: trunk/Source/_javascript_Core/_javascript_Core.xcodeproj/project.pbxproj (104348 => 104349)
--- trunk/Source/_javascript_Core/_javascript_Core.xcodeproj/project.pbxproj 2012-01-06 23:16:52 UTC (rev 104348)
+++ trunk/Source/_javascript_Core/_javascript_Core.xcodeproj/project.pbxproj 2012-01-06 23:20:48 UTC (rev 104349)
@@ -48,6 +48,7 @@
0BAC94A01338728400CF135B /* ThreadRestrictionVerifier.h in Headers */ = {isa = PBXBuildFile; fileRef = 0BAC949E1338728400CF135B /* ThreadRestrictionVerifier.h */; settings = {ATTRIBUTES = (Private, ); }; };
0BCD83571485845200EA2003 /* TemporaryChange.h in Headers */ = {isa = PBXBuildFile; fileRef = 0BCD83541485841200EA2003 /* TemporaryChange.h */; settings = {ATTRIBUTES = (Private, ); }; };
0BF28A2911A33DC300638F84 /* SizeLimits.cpp in Sources */ = {isa = PBXBuildFile; fileRef = 0BF28A2811A33DC300638F84 /* SizeLimits.cpp */; };
+ 0F15F15F14B7A73E005DE37D /* CommonSlowPaths.h in Headers */ = {isa = PBXBuildFile; fileRef = 0F15F15D14B7A73A005DE37D /* CommonSlowPaths.h */; settings = {ATTRIBUTES = (Private, ); }; };
0F16D726142C39C000CF784A /* BitVector.cpp in Sources */ = {isa = PBXBuildFile; fileRef = 0F16D724142C39A200CF784A /* BitVector.cpp */; };
0F242DA713F3B1E8007ADD4C /* WeakReferenceHarvester.h in Headers */ = {isa = PBXBuildFile; fileRef = 0F242DA513F3B1BB007ADD4C /* WeakReferenceHarvester.h */; settings = {ATTRIBUTES = (Private, ); }; };
0F2C556F14738F3100121E4F /* DFGCodeBlocks.h in Headers */ = {isa = PBXBuildFile; fileRef = 0F2C556E14738F2E00121E4F /* DFGCodeBlocks.h */; settings = {ATTRIBUTES = (Private, ); }; };
@@ -830,6 +831,7 @@
0BAC949E1338728400CF135B /* ThreadRestrictionVerifier.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = ThreadRestrictionVerifier.h; sourceTree = "<group>"; };
0BCD83541485841200EA2003 /* TemporaryChange.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = TemporaryChange.h; sourceTree = "<group>"; };
0BF28A2811A33DC300638F84 /* SizeLimits.cpp */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.cpp.cpp; path = SizeLimits.cpp; sourceTree = "<group>"; };
+ 0F15F15D14B7A73A005DE37D /* CommonSlowPaths.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = CommonSlowPaths.h; sourceTree = "<group>"; };
0F16D724142C39A200CF784A /* BitVector.cpp */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.cpp.cpp; path = BitVector.cpp; sourceTree = "<group>"; };
0F242DA513F3B1BB007ADD4C /* WeakReferenceHarvester.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = WeakReferenceHarvester.h; sourceTree = "<group>"; };
0F2C556D14738F2E00121E4F /* DFGCodeBlocks.cpp */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.cpp.cpp; path = DFGCodeBlocks.cpp; sourceTree = "<group>"; };
@@ -2115,6 +2117,7 @@
7EF6E0BB0EB7A1EC0079AFAF /* runtime */ = {
isa = PBXGroup;
children = (
+ 0F15F15D14B7A73A005DE37D /* CommonSlowPaths.h */,
BCF605110E203EF800B9A64D /* ArgList.cpp */,
BCF605120E203EF800B9A64D /* ArgList.h */,
BC257DE50E1F51C50016B6C9 /* Arguments.cpp */,
@@ -3000,6 +3003,7 @@
86704B8812DBA33700A9FE7B /* YarrParser.h in Headers */,
86704B8A12DBA33700A9FE7B /* YarrPattern.h in Headers */,
86704B4312DB8A8100A9FE7B /* YarrSyntaxChecker.h in Headers */,
+ 0F15F15F14B7A73E005DE37D /* CommonSlowPaths.h in Headers */,
);
runOnlyForDeploymentPostprocessing = 0;
};
Modified: trunk/Source/_javascript_Core/jit/JITStubs.cpp (104348 => 104349)
--- trunk/Source/_javascript_Core/jit/JITStubs.cpp 2012-01-06 23:16:52 UTC (rev 104348)
+++ trunk/Source/_javascript_Core/jit/JITStubs.cpp 2012-01-06 23:20:48 UTC (rev 104349)
@@ -33,6 +33,7 @@
#if ENABLE(JIT)
#include "JITStubs.h"
+#include "CommonSlowPaths.h"
#include "Arguments.h"
#include "CallFrame.h"
#include "CodeBlock.h"
@@ -2088,29 +2089,10 @@
JSValue value = stackFrame.args[0].jsValue();
JSValue baseVal = stackFrame.args[1].jsValue();
JSValue proto = stackFrame.args[2].jsValue();
-
- // At least one of these checks must have failed to get to the slow case.
- ASSERT(!value.isCell() || !baseVal.isCell() || !proto.isCell()
- || !value.isObject() || !baseVal.isObject() || !proto.isObject()
- || !asObject(baseVal)->structure()->typeInfo().implementsDefaultHasInstance());
-
-
- // ECMA-262 15.3.5.3:
- // Throw an exception either if baseVal is not an object, or if it does not implement 'HasInstance' (i.e. is a function).
- TypeInfo typeInfo(UnspecifiedType);
- if (!baseVal.isObject() || !(typeInfo = asObject(baseVal)->structure()->typeInfo()).implementsHasInstance()) {
- stackFrame.globalData->exception = createInvalidParamError(stackFrame.callFrame, "instanceof", baseVal);
- VM_THROW_EXCEPTION();
- }
- ASSERT(typeInfo.type() != UnspecifiedType);
-
- if (!typeInfo.overridesHasInstance() && !value.isObject())
- return JSValue::encode(jsBoolean(false));
-
- JSValue result = jsBoolean(asObject(baseVal)->methodTable()->hasInstance(asObject(baseVal), callFrame, value, proto));
+
+ bool result = CommonSlowPaths::opInstanceOfSlow(callFrame, value, baseVal, proto);
CHECK_FOR_EXCEPTION_AT_END();
-
- return JSValue::encode(result);
+ return JSValue::encode(jsBoolean(result));
}
DEFINE_STUB_FUNCTION(EncodedJSValue, op_del_by_id)
@@ -2424,25 +2406,10 @@
STUB_INIT_STACK_FRAME(stackFrame);
CallFrame* callFrame = stackFrame.callFrame;
- ScopeChainNode* scopeChain = callFrame->scopeChain();
- ScopeChainIterator iter = scopeChain->begin();
- ScopeChainIterator end = scopeChain->end();
- ASSERT(iter != end);
-
- Identifier& ident = stackFrame.args[0].identifier();
- do {
- JSObject* o = iter->get();
- PropertySlot slot(o);
- if (o->getPropertySlot(callFrame, ident, slot)) {
- JSValue result = slot.getValue(callFrame, ident);
- CHECK_FOR_EXCEPTION_AT_END();
- return JSValue::encode(result);
- }
- } while (++iter != end);
-
- stackFrame.globalData->exception = createUndefinedVariableError(callFrame, ident);
- VM_THROW_EXCEPTION();
+ JSValue result = CommonSlowPaths::opResolve(callFrame, stackFrame.args[0].identifier());
+ CHECK_FOR_EXCEPTION_AT_END();
+ return JSValue::encode(result);
}
DEFINE_STUB_FUNCTION(EncodedJSValue, op_construct_NotJSConstruct)
@@ -2784,38 +2751,9 @@
{
STUB_INIT_STACK_FRAME(stackFrame);
- CallFrame* callFrame = stackFrame.callFrame;
- ScopeChainNode* scopeChain = callFrame->scopeChain();
-
- int skip = stackFrame.args[1].int32();
-
- ScopeChainIterator iter = scopeChain->begin();
- ScopeChainIterator end = scopeChain->end();
- ASSERT(iter != end);
- CodeBlock* codeBlock = callFrame->codeBlock();
- bool checkTopLevel = codeBlock->codeType() == FunctionCode && codeBlock->needsFullScopeChain();
- ASSERT(skip || !checkTopLevel);
- if (checkTopLevel && skip--) {
- if (callFrame->uncheckedR(codeBlock->activationRegister()).jsValue())
- ++iter;
- }
- while (skip--) {
- ++iter;
- ASSERT(iter != end);
- }
- Identifier& ident = stackFrame.args[0].identifier();
- do {
- JSObject* o = iter->get();
- PropertySlot slot(o);
- if (o->getPropertySlot(callFrame, ident, slot)) {
- JSValue result = slot.getValue(callFrame, ident);
- CHECK_FOR_EXCEPTION_AT_END();
- return JSValue::encode(result);
- }
- } while (++iter != end);
-
- stackFrame.globalData->exception = createUndefinedVariableError(callFrame, ident);
- VM_THROW_EXCEPTION();
+ JSValue result = CommonSlowPaths::opResolveSkip(stackFrame.callFrame, stackFrame.args[0].identifier(), stackFrame.args[1].int32());
+ CHECK_FOR_EXCEPTION_AT_END();
+ return JSValue::encode(result);
}
DEFINE_STUB_FUNCTION(EncodedJSValue, op_resolve_global)
@@ -3143,33 +3081,9 @@
STUB_INIT_STACK_FRAME(stackFrame);
CallFrame* callFrame = stackFrame.callFrame;
- ScopeChainNode* scopeChain = callFrame->scopeChain();
-
- ScopeChainIterator iter = scopeChain->begin();
- ScopeChainIterator end = scopeChain->end();
-
- // FIXME: add scopeDepthIsZero optimization
-
- ASSERT(iter != end);
-
- Identifier& ident = stackFrame.args[0].identifier();
- JSObject* base;
- do {
- base = iter->get();
- PropertySlot slot(base);
- if (base->getPropertySlot(callFrame, ident, slot)) {
- JSValue result = slot.getValue(callFrame, ident);
- CHECK_FOR_EXCEPTION_AT_END();
-
- callFrame->registers()[stackFrame.args[1].int32()] = JSValue(base);
- return JSValue::encode(result);
- }
- ++iter;
- } while (iter != end);
-
- stackFrame.globalData->exception = createUndefinedVariableError(callFrame, ident);
- VM_THROW_EXCEPTION_AT_END();
- return JSValue::encode(JSValue());
+ JSValue result = CommonSlowPaths::opResolveWithBase(callFrame, stackFrame.args[0].identifier(), callFrame->registers()[stackFrame.args[1].int32()]);
+ CHECK_FOR_EXCEPTION_AT_END();
+ return JSValue::encode(result);
}
DEFINE_STUB_FUNCTION(EncodedJSValue, op_resolve_with_this)
@@ -3177,41 +3091,9 @@
STUB_INIT_STACK_FRAME(stackFrame);
CallFrame* callFrame = stackFrame.callFrame;
- ScopeChainNode* scopeChain = callFrame->scopeChain();
-
- ScopeChainIterator iter = scopeChain->begin();
- ScopeChainIterator end = scopeChain->end();
-
- // FIXME: add scopeDepthIsZero optimization
-
- ASSERT(iter != end);
-
- Identifier& ident = stackFrame.args[0].identifier();
- JSObject* base;
- do {
- base = iter->get();
- ++iter;
- PropertySlot slot(base);
- if (base->getPropertySlot(callFrame, ident, slot)) {
- JSValue result = slot.getValue(callFrame, ident);
- CHECK_FOR_EXCEPTION_AT_END();
-
- // All entries on the scope chain should be EnvironmentRecords (activations etc),
- // other then 'with' object, which are directly referenced from the scope chain,
- // and the global object. If we hit either an EnvironmentRecord or a global
- // object at the end of the scope chain, this is undefined. If we hit a non-
- // EnvironmentRecord within the scope chain, pass the base as the this value.
- if (iter == end || base->structure()->typeInfo().isEnvironmentRecord())
- callFrame->registers()[stackFrame.args[1].int32()] = jsUndefined();
- else
- callFrame->registers()[stackFrame.args[1].int32()] = JSValue(base);
- return JSValue::encode(result);
- }
- } while (iter != end);
-
- stackFrame.globalData->exception = createUndefinedVariableError(callFrame, ident);
- VM_THROW_EXCEPTION_AT_END();
- return JSValue::encode(JSValue());
+ JSValue result = CommonSlowPaths::opResolveWithThis(callFrame, stackFrame.args[0].identifier(), callFrame->registers()[stackFrame.args[1].int32()]);
+ CHECK_FOR_EXCEPTION_AT_END();
+ return JSValue::encode(result);
}
DEFINE_STUB_FUNCTION(JSObject*, op_new_func_exp)
Added: trunk/Source/_javascript_Core/runtime/CommonSlowPaths.h (0 => 104349)
--- trunk/Source/_javascript_Core/runtime/CommonSlowPaths.h (rev 0)
+++ trunk/Source/_javascript_Core/runtime/CommonSlowPaths.h 2012-01-06 23:20:48 UTC (rev 104349)
@@ -0,0 +1,204 @@
+/*
+ * Copyright (C) 2011, 2012 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 CommonSlowPaths_h
+#define CommonSlowPaths_h
+
+#include "CodeBlock.h"
+#include "ExceptionHelpers.h"
+#include "JSArray.h"
+
+namespace JSC {
+
+// The purpose of this namespace is to include slow paths that are shared
+// between the interpreter and baseline JIT. They are written to be agnostic
+// with respect to the slow-path calling convention, but they do rely on the
+// JS code being executed more-or-less directly from bytecode (so the call
+// frame layout is unmodified, making it potentially awkward to use these
+// from any optimizing JIT, like the DFG).
+
+namespace CommonSlowPaths {
+
+ALWAYS_INLINE bool opInstanceOfSlow(ExecState* exec, JSValue value, JSValue baseVal, JSValue proto)
+{
+ ASSERT(!value.isCell() || !baseVal.isCell() || !proto.isCell()
+ || !value.isObject() || !baseVal.isObject() || !proto.isObject()
+ || !asObject(baseVal)->structure()->typeInfo().implementsDefaultHasInstance());
+
+
+ // ECMA-262 15.3.5.3:
+ // Throw an exception either if baseVal is not an object, or if it does not implement 'HasInstance' (i.e. is a function).
+ TypeInfo typeInfo(UnspecifiedType);
+ if (!baseVal.isObject() || !(typeInfo = asObject(baseVal)->structure()->typeInfo()).implementsHasInstance()) {
+ exec->globalData().exception = createInvalidParamError(exec, "instanceof", baseVal);
+ return false;
+ }
+ ASSERT(typeInfo.type() != UnspecifiedType);
+
+ if (!typeInfo.overridesHasInstance() && !value.isObject())
+ return false;
+
+ return asObject(baseVal)->methodTable()->hasInstance(asObject(baseVal), exec, value, proto);
+}
+
+inline bool opIn(ExecState* exec, JSValue propName, JSValue baseVal)
+{
+ if (!baseVal.isObject()) {
+ exec->globalData().exception = createInvalidParamError(exec, "in", baseVal);
+ return false;
+ }
+
+ JSObject* baseObj = asObject(baseVal);
+
+ uint32_t i;
+ if (propName.getUInt32(i))
+ return baseObj->hasProperty(exec, i);
+
+ Identifier property(exec, propName.toString(exec));
+ if (exec->globalData().exception)
+ return false;
+ return baseObj->hasProperty(exec, property);
+}
+
+ALWAYS_INLINE JSValue opResolve(ExecState* exec, Identifier& ident)
+{
+ ScopeChainNode* scopeChain = exec->scopeChain();
+
+ ScopeChainIterator iter = scopeChain->begin();
+ ScopeChainIterator end = scopeChain->end();
+ ASSERT(iter != end);
+
+ do {
+ JSObject* o = iter->get();
+ PropertySlot slot(o);
+ if (o->getPropertySlot(exec, ident, slot))
+ return slot.getValue(exec, ident);
+ } while (++iter != end);
+
+ exec->globalData().exception = createUndefinedVariableError(exec, ident);
+ return JSValue();
+}
+
+ALWAYS_INLINE JSValue opResolveSkip(ExecState* exec, Identifier& ident, int skip)
+{
+ ScopeChainNode* scopeChain = exec->scopeChain();
+
+ ScopeChainIterator iter = scopeChain->begin();
+ ScopeChainIterator end = scopeChain->end();
+ ASSERT(iter != end);
+ CodeBlock* codeBlock = exec->codeBlock();
+ bool checkTopLevel = codeBlock->codeType() == FunctionCode && codeBlock->needsFullScopeChain();
+ ASSERT(skip || !checkTopLevel);
+ if (checkTopLevel && skip--) {
+ if (exec->uncheckedR(codeBlock->activationRegister()).jsValue())
+ ++iter;
+ }
+ while (skip--) {
+ ++iter;
+ ASSERT(iter != end);
+ }
+ do {
+ JSObject* o = iter->get();
+ PropertySlot slot(o);
+ if (o->getPropertySlot(exec, ident, slot))
+ return slot.getValue(exec, ident);
+ } while (++iter != end);
+
+ exec->globalData().exception = createUndefinedVariableError(exec, ident);
+ return JSValue();
+}
+
+ALWAYS_INLINE JSValue opResolveWithBase(ExecState* exec, Identifier& ident, Register& baseSlot)
+{
+ ScopeChainNode* scopeChain = exec->scopeChain();
+
+ ScopeChainIterator iter = scopeChain->begin();
+ ScopeChainIterator end = scopeChain->end();
+
+ // FIXME: add scopeDepthIsZero optimization
+
+ ASSERT(iter != end);
+
+ JSObject* base;
+ do {
+ base = iter->get();
+ PropertySlot slot(base);
+ if (base->getPropertySlot(exec, ident, slot)) {
+ JSValue result = slot.getValue(exec, ident);
+ if (exec->globalData().exception)
+ return JSValue();
+
+ baseSlot = JSValue(base);
+ return result;
+ }
+ ++iter;
+ } while (iter != end);
+
+ exec->globalData().exception = createUndefinedVariableError(exec, ident);
+ return JSValue();
+}
+
+ALWAYS_INLINE JSValue opResolveWithThis(ExecState* exec, Identifier& ident, Register& baseSlot)
+{
+ ScopeChainNode* scopeChain = exec->scopeChain();
+
+ ScopeChainIterator iter = scopeChain->begin();
+ ScopeChainIterator end = scopeChain->end();
+
+ // FIXME: add scopeDepthIsZero optimization
+
+ ASSERT(iter != end);
+
+ JSObject* base;
+ do {
+ base = iter->get();
+ ++iter;
+ PropertySlot slot(base);
+ if (base->getPropertySlot(exec, ident, slot)) {
+ JSValue result = slot.getValue(exec, ident);
+ if (exec->globalData().exception)
+ return JSValue();
+
+ // All entries on the scope chain should be EnvironmentRecords (activations etc),
+ // other then 'with' object, which are directly referenced from the scope chain,
+ // and the global object. If we hit either an EnvironmentRecord or a global
+ // object at the end of the scope chain, this is undefined. If we hit a non-
+ // EnvironmentRecord within the scope chain, pass the base as the this value.
+ if (iter == end || base->structure()->typeInfo().isEnvironmentRecord())
+ baseSlot = jsUndefined();
+ else
+ baseSlot = JSValue(base);
+ return result;
+ }
+ } while (iter != end);
+
+ exec->globalData().exception = createUndefinedVariableError(exec, ident);
+ return JSValue();
+}
+
+} } // namespace JSC::CommonSlowPaths
+
+#endif // CommonSlowPaths_h
+
