Changeset 192876 in webkit for trunk/Source/JavaScriptCore/runtime/Executable.h

Timestamp:

Dec 1, 2015, 1:46:12 AM (10 years ago)

Author:

[email protected]

Message:

[ES6] "super" and "this" should be lexically bound inside an arrow function and should live in a JSLexicalEnvironment
​https://bugs.webkit.org/show_bug.cgi?id=149338

Source/JavaScriptCore:

Patch by Aleksandr Skachkov <​[email protected]> on 2015-12-01
Reviewed by Saam Barati.

Implemented new version of the lexically bound 'this' in arrow function. In current version
'this' is stored inside of the lexical environment of the function. To store and load we use
op_get_from_scope and op_put_to_scope operations. Also new implementation prevent raising TDZ
error for arrow functions that are declared before super() but invoke after.

• builtins/BuiltinExecutables.cpp:

(JSC::createExecutableInternal):

• bytecode/BytecodeList.json:
• bytecode/BytecodeUseDef.h:
• bytecode/CodeBlock.cpp:

(JSC::CodeBlock::dumpBytecode):

• bytecode/EvalCodeCache.h:

(JSC::EvalCodeCache::getSlow):

• bytecode/ExecutableInfo.h:

(JSC::ExecutableInfo::ExecutableInfo):
(JSC::ExecutableInfo::isDerivedConstructorContext):
(JSC::ExecutableInfo::isArrowFunctionContext):

• bytecode/UnlinkedCodeBlock.cpp:

(JSC::UnlinkedCodeBlock::UnlinkedCodeBlock):

• bytecode/UnlinkedCodeBlock.h:

(JSC::UnlinkedCodeBlock::isDerivedConstructorContext):
(JSC::UnlinkedCodeBlock::isArrowFunctionContext):

• bytecode/UnlinkedFunctionExecutable.cpp:

(JSC::generateUnlinkedFunctionCodeBlock):
(JSC::UnlinkedFunctionExecutable::UnlinkedFunctionExecutable):

• bytecode/UnlinkedFunctionExecutable.h:
• bytecompiler/BytecodeGenerator.cpp:

(JSC::BytecodeGenerator::BytecodeGenerator):
(JSC::BytecodeGenerator::initializeArrowFunctionContextScopeIfNeeded):
(JSC::BytecodeGenerator::variable):
(JSC::BytecodeGenerator::emitLoadArrowFunctionLexicalEnvironment):
(JSC::BytecodeGenerator::emitLoadThisFromArrowFunctionLexicalEnvironment):
(JSC::BytecodeGenerator::emitLoadNewTargetFromArrowFunctionLexicalEnvironment):
(JSC::BytecodeGenerator::emitLoadDerivedConstructorFromArrowFunctionLexicalEnvironment):
(JSC::BytecodeGenerator::emitPutNewTargetToArrowFunctionContextScope):
(JSC::BytecodeGenerator::emitPutDerivedConstructorToArrowFunctionContextScope):
(JSC::BytecodeGenerator::emitPutThisToArrowFunctionContextScope):

• bytecompiler/BytecodeGenerator.h:

(JSC::BytecodeGenerator::isDerivedConstructorContext):
(JSC::BytecodeGenerator::usesArrowFunction):
(JSC::BytecodeGenerator::needsToUpdateArrowFunctionContext):
(JSC::BytecodeGenerator::usesEval):
(JSC::BytecodeGenerator::usesThis):
(JSC::BytecodeGenerator::newTarget):
(JSC::BytecodeGenerator::makeFunction):

• bytecompiler/NodesCodegen.cpp:

(JSC::ThisNode::emitBytecode):
(JSC::SuperNode::emitBytecode):
(JSC::EvalFunctionCallNode::emitBytecode):
(JSC::FunctionCallValueNode::emitBytecode):
(JSC::FunctionNode::emitBytecode):

• debugger/DebuggerCallFrame.cpp:

(JSC::DebuggerCallFrame::evaluate):

• dfg/DFGAbstractInterpreterInlines.h:
• dfg/DFGByteCodeParser.cpp:

(JSC::DFG::ByteCodeParser::parseBlock):

• dfg/DFGCapabilities.cpp:
• dfg/DFGClobberize.h:
• dfg/DFGDoesGC.cpp:
• dfg/DFGFixupPhase.cpp:
• dfg/DFGNodeType.h:
• dfg/DFGObjectAllocationSinkingPhase.cpp:
• dfg/DFGPredictionPropagationPhase.cpp:
• dfg/DFGPromotedHeapLocation.cpp:
• dfg/DFGPromotedHeapLocation.h:
• dfg/DFGSafeToExecute.h:
• dfg/DFGSpeculativeJIT.cpp:
• dfg/DFGSpeculativeJIT.h:
• dfg/DFGSpeculativeJIT32_64.cpp:
• dfg/DFGSpeculativeJIT64.cpp:
• ftl/FTLCapabilities.cpp:
• ftl/FTLLowerDFGToLLVM.cpp:
• ftl/FTLOperations.cpp:

(JSC::FTL::operationMaterializeObjectInOSR):

• interpreter/Interpreter.cpp:

(JSC::eval):

• jit/JIT.cpp:
• jit/JIT.h:
• jit/JITOpcodes.cpp:

(JSC::JIT::emitNewFuncExprCommon):

• jit/JITOpcodes32_64.cpp:
• llint/LLIntSlowPaths.cpp:

(JSC::LLInt::LLINT_SLOW_PATH_DECL):

• llint/LowLevelInterpreter.asm:
• llint/LowLevelInterpreter32_64.asm:
• llint/LowLevelInterpreter64.asm:
• parser/ASTBuilder.h:

(JSC::ASTBuilder::createArrowFunctionExpr):
(JSC::ASTBuilder::usesArrowFunction):

• parser/Nodes.h:

(JSC::ScopeNode::usesArrowFunction):

• parser/Parser.cpp:

(JSC::Parser<LexerType>::parseFunctionInfo):

• parser/ParserModes.h:
• runtime/CodeCache.cpp:

(JSC::CodeCache::getGlobalCodeBlock):
(JSC::CodeCache::getProgramCodeBlock):
(JSC::CodeCache::getEvalCodeBlock):
(JSC::CodeCache::getModuleProgramCodeBlock):
(JSC::CodeCache::getFunctionExecutableFromGlobalCode):

• runtime/CodeCache.h:
• runtime/CommonIdentifiers.h:
• runtime/CommonSlowPaths.cpp:

(JSC::SLOW_PATH_DECL):

• runtime/Executable.cpp:

(JSC::ScriptExecutable::ScriptExecutable):
(JSC::EvalExecutable::create):
(JSC::EvalExecutable::EvalExecutable):
(JSC::ProgramExecutable::ProgramExecutable):
(JSC::ModuleProgramExecutable::ModuleProgramExecutable):
(JSC::FunctionExecutable::FunctionExecutable):

• runtime/Executable.h:

(JSC::ScriptExecutable::isArrowFunctionContext):
(JSC::ScriptExecutable::isDerivedConstructorContext):

• runtime/JSGlobalObject.cpp:

(JSC::JSGlobalObject::createEvalCodeBlock):

• runtime/JSGlobalObject.h:
• runtime/JSGlobalObjectFunctions.cpp:

(JSC::globalFuncEval):

• tests/es6.yaml:
• tests/stress/arrowfunction-activation-sink-osrexit.js:
• tests/stress/arrowfunction-activation-sink.js:
• tests/stress/arrowfunction-lexical-bind-newtarget.js: Added.
• tests/stress/arrowfunction-lexical-bind-supercall-1.js: Added.
• tests/stress/arrowfunction-lexical-bind-supercall-2.js: Added.
• tests/stress/arrowfunction-lexical-bind-supercall-3.js: Added.
• tests/stress/arrowfunction-lexical-bind-supercall-4.js: Added.
• tests/stress/arrowfunction-lexical-bind-this-1.js:
• tests/stress/arrowfunction-lexical-bind-this-7.js: Added.
• tests/stress/arrowfunction-tdz-1.js: Added.
• tests/stress/arrowfunction-tdz-2.js: Added.
• tests/stress/arrowfunction-tdz-3.js: Added.
• tests/stress/arrowfunction-tdz-4.js: Added.
• tests/stress/arrowfunction-tdz.js: Removed.

LayoutTests:

Patch by Skachkov Oleksandr <​[email protected]> on 2015-12-01
Reviewed by Saam Barati.

• js/arrowfunction-supercall-expected.txt: Added.
• js/arrowfunction-supercall.html: Added.
• js/arrowfunction-tdz-expected.txt: Added new expectation.
• js/script-tests/arrowfunction-supercall.js: Added.
• js/script-tests/arrowfunction-tdz.js: Added new cases.

File:

• trunk/Source/JavaScriptCore/runtime/Executable.h (modified) (9 diffs)

trunk/Source/JavaScriptCore/runtime/Executable.h

@@ -345 +345 @@
     bool usesArguments() const { return m_features & ArgumentsFeature; }
     bool needsActivation() const { return m_hasCapturedVariables || m_features & (EvalFeature | WithFeature); }
+    bool isArrowFunctionContext() const { return m_isArrowFunctionContext; }
     bool isStrictMode() const { return m_features & StrictModeFeature; }
+    bool isDerivedConstructorContext() const { return m_isDerivedConstructorContext; }
     ECMAMode ecmaMode() const { return isStrictMode() ? StrictMode : NotStrictMode; }
         
@@ -394 +396 @@
 
 protected:
-    ScriptExecutable(Structure* structure, VM& vm, const SourceCode& source, bool isInStrictContext);
+    ScriptExecutable(Structure*, VM&, const SourceCode&, bool isInStrictContext, bool isInDerivedConstructorContext, bool isInArrowFunctionContext);
 
     void finishCreation(VM& vm)
@@ -413 +415 @@
     bool m_neverOptimize { false };
     bool m_didTryToEnterInLoop;
+    bool m_isDerivedConstructorContext;
+    bool m_isArrowFunctionContext;
     int m_overrideLineNumber;
     int m_firstLine;
@@ -435 +439 @@
     }
 
-    static EvalExecutable* create(ExecState*, const SourceCode&, bool isInStrictContext, ThisTDZMode, const VariableEnvironment*);
+    static EvalExecutable* create(ExecState*, const SourceCode&, bool isInStrictContext, ThisTDZMode, bool isDerivedConstructorContext, bool isArrowFunctionContext, const VariableEnvironment*);
 
     PassRefPtr<JITCode> generatedJITCode()
@@ -449 +453 @@
     DECLARE_INFO;
 
-    ExecutableInfo executableInfo() const { return ExecutableInfo(needsActivation(), usesEval(), isStrictMode(), false, false, ConstructorKind::None, false); }
+    ExecutableInfo executableInfo() const { return ExecutableInfo(needsActivation(), usesEval(), isStrictMode(), false, false, ConstructorKind::None, false, isDerivedConstructorContext(), isArrowFunctionContext()); }
 
     unsigned numVariables() { return m_unlinkedEvalCodeBlock->numVariables(); }
@@ -457 +461 @@
     friend class ExecutableBase;
     friend class ScriptExecutable;
-    EvalExecutable(ExecState*, const SourceCode&, bool);
+    EvalExecutable(ExecState*, const SourceCode&, bool inStrictContext, bool isDerivedConstructorContext, bool isArrowFunctionContext);
 
     static void visitChildren(JSCell*, SlotVisitor&);
@@ -502 +506 @@
     DECLARE_INFO;
 
-    ExecutableInfo executableInfo() const { return ExecutableInfo(needsActivation(), usesEval(), isStrictMode(), false, false, ConstructorKind::None, false); }
+    ExecutableInfo executableInfo() const { return ExecutableInfo(needsActivation(), usesEval(), isStrictMode(), false, false, ConstructorKind::None, false, isDerivedConstructorContext(), false); }
 
 private:
@@ -543 +547 @@
     DECLARE_INFO;
 
-    ExecutableInfo executableInfo() const { return ExecutableInfo(needsActivation(), usesEval(), isStrictMode(), false, false, ConstructorKind::None, false); }
+    ExecutableInfo executableInfo() const { return ExecutableInfo(needsActivation(), usesEval(), isStrictMode(), false, false, ConstructorKind::None, false, isDerivedConstructorContext(), false); }
+
     UnlinkedModuleProgramCodeBlock* unlinkedModuleProgramCodeBlock() { return m_unlinkedModuleProgramCodeBlock.get(); }
 
@@ -652 +657 @@
     ConstructAbility constructAbility() const { return m_unlinkedExecutable->constructAbility(); }
     bool isArrowFunction() const { return m_unlinkedExecutable->isArrowFunction(); }
+    bool isDerivedConstructorContext() const { return m_unlinkedExecutable->isDerivedConstructorContext(); }
     bool isClassConstructorFunction() const { return m_unlinkedExecutable->isClassConstructorFunction(); }
     const Identifier& name() { return m_unlinkedExecutable->name(); }