void JSGlobalObject::haveABadTime(VM& vm)
{
ASSERT(&vm == &this->vm());
if (isHavingABadTime())
return;
// Make sure that all allocations or indexed storage transitions that are inlining
// the assumption that it's safe to transition to a non-SlowPut array storage don't
// do so anymore.
m_havingABadTimeWatchpoint->notifyWrite();
ASSERT(isHavingABadTime()); // The watchpoint is what tells us that we're having a bad time.
// Make sure that all JSArray allocations that load the appropriate structure from
// this object now load a structure that uses SlowPut.
for (unsigned i = 0; i < NumberOfIndexingShapes; ++i)
m_arrayStructureForIndexingShapeDuringAllocation[i].set(vm, this, originalArrayStructureForIndexingType(ArrayWithSlowPutArrayStorage));
// Make sure that all objects that have indexed storage switch to the slow kind of
// indexed storage.
MarkedArgumentBuffer foundObjects; // Use MarkedArgumentBuffer because switchToSlowPutArrayStorage() may GC.
ObjectsWithBrokenIndexingFinder finder(foundObjects, this);
vm.heap.objectSpace().forEachLiveCell(finder);
while (!foundObjects.isEmpty()) {
JSObject* object = asObject(foundObjects.last());
foundObjects.removeLast();
ASSERT(hasBrokenIndexing(object));
object->switchToSlowPutArrayStorage(vm);
}
}
AJValue LiteralParser::parse(ParserState initialState)
{
ParserState state = initialState;
MarkedArgumentBuffer objectStack;
AJValue lastValue;
Vector<ParserState, 16> stateStack;
Vector<Identifier, 16> identifierStack;
while (1) {
switch(state) {
startParseArray:
case StartParseArray: {
AJArray* array = constructEmptyArray(m_exec);
objectStack.append(array);
// fallthrough
}
doParseArrayStartExpression:
case DoParseArrayStartExpression: {
TokenType lastToken = m_lexer.currentToken().type;
if (m_lexer.next() == TokRBracket) {
if (lastToken == TokComma)
return AJValue();
m_lexer.next();
lastValue = objectStack.last();
objectStack.removeLast();
break;
}
stateStack.append(DoParseArrayEndExpression);
goto startParseExpression;
}
case DoParseArrayEndExpression: {
asArray(objectStack.last())->push(m_exec, lastValue);
if (m_lexer.currentToken().type == TokComma)
goto doParseArrayStartExpression;
if (m_lexer.currentToken().type != TokRBracket)
return AJValue();
m_lexer.next();
lastValue = objectStack.last();
objectStack.removeLast();
break;
}
startParseObject:
case StartParseObject: {
AJObject* object = constructEmptyObject(m_exec);
objectStack.append(object);
TokenType type = m_lexer.next();
if (type == TokString) {
Lexer::LiteralParserToken identifierToken = m_lexer.currentToken();
// Check for colon
if (m_lexer.next() != TokColon)
return AJValue();
m_lexer.next();
identifierStack.append(Identifier(m_exec, identifierToken.stringToken));
stateStack.append(DoParseObjectEndExpression);
goto startParseExpression;
} else if (type != TokRBrace)
return AJValue();
m_lexer.next();
lastValue = objectStack.last();
objectStack.removeLast();
break;
}
doParseObjectStartExpression:
case DoParseObjectStartExpression: {
TokenType type = m_lexer.next();
if (type != TokString)
return AJValue();
Lexer::LiteralParserToken identifierToken = m_lexer.currentToken();
// Check for colon
if (m_lexer.next() != TokColon)
return AJValue();
m_lexer.next();
identifierStack.append(Identifier(m_exec, identifierToken.stringToken));
stateStack.append(DoParseObjectEndExpression);
goto startParseExpression;
}
case DoParseObjectEndExpression:
{
asObject(objectStack.last())->putDirect(identifierStack.last(), lastValue);
identifierStack.removeLast();
if (m_lexer.currentToken().type == TokComma)
goto doParseObjectStartExpression;
if (m_lexer.currentToken().type != TokRBrace)
return AJValue();
m_lexer.next();
lastValue = objectStack.last();
objectStack.removeLast();
break;
}
startParseExpression:
case StartParseExpression: {
switch (m_lexer.currentToken().type) {
case TokLBracket:
goto startParseArray;
case TokLBrace:
goto startParseObject;
case TokString: {
Lexer::LiteralParserToken stringToken = m_lexer.currentToken();
m_lexer.next();
lastValue = jsString(m_exec, stringToken.stringToken);
break;
}
case TokNumber: {
Lexer::LiteralParserToken numberToken = m_lexer.currentToken();
m_lexer.next();
lastValue = jsNumber(m_exec, numberToken.numberToken);
break;
}
case TokNull:
m_lexer.next();
lastValue = jsNull();
break;
case TokTrue:
m_lexer.next();
lastValue = jsBoolean(true);
break;
case TokFalse:
m_lexer.next();
lastValue = jsBoolean(false);
break;
default:
// Error
return AJValue();
}
break;
}
case StartParseStatement: {
switch (m_lexer.currentToken().type) {
case TokLBracket:
case TokNumber:
case TokString:
goto startParseExpression;
case TokLParen: {
m_lexer.next();
stateStack.append(StartParseStatementEndStatement);
goto startParseExpression;
}
default:
return AJValue();
}
}
case StartParseStatementEndStatement: {
ASSERT(stateStack.isEmpty());
if (m_lexer.currentToken().type != TokRParen)
return AJValue();
if (m_lexer.next() == TokEnd)
return lastValue;
return AJValue();
}
default:
ASSERT_NOT_REACHED();
}
if (stateStack.isEmpty())
return lastValue;
state = stateStack.last();
stateStack.removeLast();
continue;
}
}
