Exemple #1
0
 /** 11.1.2 assignment with right-hand-side identifier reference. */
 @Override
 public void visit(ReadVariableNode n, State state) {
   String varname = n.getVariableName();
   Value v;
   if (varname.equals("this")) {
     // 11.1.1 read 'this' from the execution context
     v = state.readThis();
     m.visitReadThis(n, v, state, InitialStateBuilder.GLOBAL);
   } else { // ordinary variable
     int result_base_reg = n.getResultBaseRegister();
     Set<ObjectLabel> base_objs = null;
     if (c.isScanning() || result_base_reg != AbstractNode.NO_VALUE) base_objs = newSet();
     v = state.readVariable(varname, base_objs);
     m.visitPropertyRead(n, base_objs, Value.makeTemporaryStr(varname), state, true);
     m.visitVariableAsRead(n, v, state);
     m.visitVariableOrProperty(varname, n.getSourceLocation(), v, state.getContext(), state);
     m.visitReadNonThisVariable(n, v);
     if (v.isMaybeAbsent()) Exceptions.throwReferenceError(state, c);
     if (v.isNotPresent() && !Options.get().isPropagateDeadFlow()) {
       state.setToNone();
       return;
     }
     if (result_base_reg != AbstractNode.NO_VALUE)
       state.writeRegister(result_base_reg, Value.makeObject(base_objs)); // see 10.1.4
     m.visitRead(n, v, state);
     m.visitReadVariable(n, v, state); // TODO: combine some of these m.visitXYZ methods?
   }
   if (v.isNotPresent() && !Options.get().isPropagateDeadFlow()) {
     state.setToNone();
     return;
   }
   if (n.getResultRegister() != AbstractNode.NO_VALUE)
     state.writeRegister(n.getResultRegister(), v.restrictToNotAbsent());
 }
Exemple #2
0
 /** 11.13 and 11.4.3 assignment with 'typeof' operator. */
 @Override
 public void visit(TypeofNode n, State state) {
   Value v;
   if (n.isVariable()) {
     Value val =
         state.readVariable(
             n.getVariableName(),
             null); // TODO: should also count as a variable read in Monitoring?
     val = UnknownValueResolver.getRealValue(val, state);
     v = Operators.typeof(val, val.isMaybeAbsent());
     m.visitVariableOrProperty(
         n.getVariableName(), n.getOperandSourceLocation(), val, state.getContext(), state);
   } else {
     Value val = state.readRegister(n.getArgRegister());
     val = UnknownValueResolver.getRealValue(val, state);
     v = Operators.typeof(val, false);
   }
   if (v.isNotPresent() && !Options.get().isPropagateDeadFlow()) {
     state.setToNone();
     return;
   }
   if (n.getResultRegister() != AbstractNode.NO_VALUE)
     state.writeRegister(n.getResultRegister(), v);
 }