Changeset 182198 in webkit for trunk/Source/JavaScriptCore/parser/ParserModes.h

Timestamp:

Mar 31, 2015, 12:42:56 PM (10 years ago)

Author:

[email protected]

Message:

eval("this.foo") causes a crash if this had not been initialized in a derived class's constructor
​https://bugs.webkit.org/show_bug.cgi?id=142883

Reviewed by Filip Pizlo.

The crash was caused by eval inside the constructor of a derived class not checking TDZ.

Fixed the bug by adding a parser flag that forces the TDZ check to be always emitted when accessing "this"
in eval inside a derived class' constructor.

• bytecode/EvalCodeCache.h:

(JSC::EvalCodeCache::getSlow):

• bytecompiler/NodesCodegen.cpp:

(JSC::ThisNode::emitBytecode):

• debugger/DebuggerCallFrame.cpp:

(JSC::DebuggerCallFrame::evaluate):

• interpreter/Interpreter.cpp:

(JSC::eval):

• parser/ASTBuilder.h:

(JSC::ASTBuilder::thisExpr):

• parser/NodeConstructors.h:

(JSC::ThisNode::ThisNode):

• parser/Nodes.h:
• parser/Parser.cpp:

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

• parser/Parser.h:

(JSC::parse):

• parser/ParserModes.h:
• parser/SyntaxChecker.h:

(JSC::SyntaxChecker::thisExpr):

• runtime/CodeCache.cpp:

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

• runtime/CodeCache.h:

(JSC::SourceCodeKey::SourceCodeKey):

• runtime/Executable.cpp:

(JSC::EvalExecutable::create):

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

(JSC::JSGlobalObject::createEvalCodeBlock):

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

(JSC::globalFuncEval):

• tests/stress/class-syntax-no-tdz-in-eval.js: Added.
• tests/stress/class-syntax-tdz-in-eval.js: Added.

File:

• trunk/Source/JavaScriptCore/parser/ParserModes.h (modified) (1 diff)

trunk/Source/JavaScriptCore/parser/ParserModes.h

@@ -38 +38 @@
 enum class ConstructorKind { None, Base, Derived };
 enum class SuperBinding { Needed, NotNeeded };
+enum class ThisTDZMode { AlwaysCheck, CheckIfNeeded };
 
 enum ProfilerMode { ProfilerOff, ProfilerOn };