Exemplo n.º 1
0
 /** 11.2.1 assignment with left-hand-side property accessor. */
 @Override
 public void visit(WritePropertyNode n, State state) {
   // get the base value, coerce with ToObject
   Value baseval = state.readRegister(n.getBaseRegister());
   baseval = UnknownValueResolver.getRealValue(baseval, state);
   m.visitPropertyAccess(n, baseval);
   Set<ObjectLabel> objlabels = Conversion.toObjectLabels(state, n, baseval, c);
   if (objlabels.isEmpty() && !Options.get().isPropagateDeadFlow()) {
     state.setToNone();
     return;
   }
   state.writeRegister(
       n.getBaseRegister(),
       Value.makeObject(objlabels)); // if null/undefined, an exception would have been thrown via
   // toObjectLabels
   // get the property name value, separate the undefined/null/NaN components, coerce with ToString
   Value propertyval;
   int propertyreg;
   if (n.isPropertyFixed()) {
     propertyreg = AbstractNode.NO_VALUE;
     propertyval = Value.makeStr(n.getPropertyString());
   } else {
     propertyreg = n.getPropertyRegister();
     propertyval = state.readRegister(propertyreg);
     propertyval = UnknownValueResolver.getRealValue(propertyval, state);
   }
   boolean maybe_undef = propertyval.isMaybeUndef();
   boolean maybe_null = propertyval.isMaybeNull();
   boolean maybe_nan = propertyval.isMaybeNaN();
   propertyval = propertyval.restrictToNotNullNotUndef().restrictToNotNaN();
   Str propertystr = Conversion.toString(propertyval, propertyreg, c);
   // get the value to be written
   Value v = state.readRegister(n.getValueRegister());
   NativeFunctions.updateArrayLength(n, state, objlabels, propertystr, v, n.getValueRegister(), c);
   // write the object property value, as fixed property name or unknown property name, and
   // separately for "undefined"/"null"/"NaN"
   state.writeProperty(objlabels, propertystr, v, true, maybe_undef || maybe_null || maybe_nan);
   if (maybe_undef && !propertystr.isMaybeStr("undefined"))
     state.writeProperty(
         objlabels, Value.makeTemporaryStr("undefined"), v, true, !propertystr.isNotStr());
   if (maybe_null && !propertystr.isMaybeStr("null"))
     state.writeProperty(
         objlabels, Value.makeTemporaryStr("null"), v, true, !propertystr.isNotStr());
   if (maybe_nan && !propertystr.isMaybeStr("NaN"))
     state.writeProperty(
         objlabels, Value.makeTemporaryStr("NaN"), v, true, !propertystr.isNotStr());
   m.visitPropertyWrite(n, objlabels, propertystr); // TODO: more monitoring around here?
   if (Options.get().isEvalStatistics()
       && propertystr.getStr() != null
       && propertystr.getStr().equals("innerHTML")) {
     m.visitInnerHTMLWrite(n, v);
   }
   m.visitVariableOrProperty(
       n.getPropertyString(), n.getSourceLocation(), v, state.getContext(), state);
 }
Exemplo n.º 2
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());
 }
Exemplo n.º 3
0
 /** 11.13 and 11.1.2 assignment with left-hand-side identifier reference. */
 @Override
 public void visit(WriteVariableNode n, State state) {
   Value v = state.readRegister(n.getValueRegister());
   m.visitWriteVariable(n, v, state);
   Set<ObjectLabel> objs = state.writeVariable(n.getVariableName(), v, true);
   Function f = n.getBlock().getFunction();
   if (f.getParameterNames().contains(n.getVariableName())) { // TODO: review
     ObjectLabel arguments_obj = new ObjectLabel(f.getEntry().getFirstNode(), Kind.ARGUMENTS);
     state.writeProperty(
         arguments_obj, Integer.toString(f.getParameterNames().indexOf(n.getVariableName())), v);
   }
   m.visitPropertyWrite(n, objs, Value.makeTemporaryStr(n.getVariableName()));
   m.visitVariableOrProperty(
       n.getVariableName(), n.getSourceLocation(), v, state.getContext(), state);
 }
Exemplo n.º 4
0
 /** 11.2.1 assignment with right-hand-side property accessor. */
 @Override
 public void visit(ReadPropertyNode n, State state) {
   // get the base value, coerce with ToObject
   Value baseval = state.readRegister(n.getBaseRegister());
   baseval = UnknownValueResolver.getRealValue(baseval, state);
   m.visitPropertyAccess(n, baseval);
   Set<ObjectLabel> objlabels = Conversion.toObjectLabels(state, n, baseval, c);
   if (objlabels.isEmpty() && !Options.get().isPropagateDeadFlow()) {
     state.setToNone();
     return;
   }
   state.writeRegister(
       n.getBaseRegister(),
       Value.makeObject(objlabels)); // if null/undefined, an exception would have been thrown via
   // toObjectLabels
   // get the property name value, separate the undefined/null/NaN components, coerce with ToString
   Value propertyval;
   int propertyreg;
   if (n.isPropertyFixed()) {
     propertyreg = AbstractNode.NO_VALUE;
     propertyval = Value.makeStr(n.getPropertyString());
   } else {
     propertyreg = n.getPropertyRegister();
     propertyval = state.readRegister(propertyreg);
     propertyval = UnknownValueResolver.getRealValue(propertyval, state);
   }
   boolean maybe_undef = propertyval.isMaybeUndef();
   boolean maybe_null = propertyval.isMaybeNull();
   boolean maybe_nan = propertyval.isMaybeNaN();
   propertyval = propertyval.restrictToNotNullNotUndef().restrictToNotNaN();
   Str propertystr = Conversion.toString(propertyval, propertyreg, c);
   // read the object property value, as fixed property name or unknown property name, and
   // separately for "undefined"/"null"/"NaN"
   Value v;
   boolean read_undefined = false;
   boolean read_null = false;
   boolean read_nan = false;
   if (propertystr.isMaybeSingleStr()) {
     String propertyname = propertystr.getStr();
     m.visitReadProperty(n, objlabels, propertystr, maybe_undef || maybe_null || maybe_nan, state);
     v = state.readPropertyValue(objlabels, propertyname);
     m.visitPropertyRead(n, objlabels, propertystr, state, true);
   } else if (!propertystr.isNotStr()) {
     m.visitReadProperty(n, objlabels, propertystr, true, state);
     m.visitPropertyRead(n, objlabels, propertystr, state, true);
     v = state.readPropertyValue(objlabels, propertystr);
     read_undefined = propertystr.isMaybeStr("undefined");
     read_null = propertystr.isMaybeStr("null");
     read_nan = propertystr.isMaybeStr("NaN");
   } else v = Value.makeNone();
   if (maybe_undef && !read_undefined) {
     m.visitReadProperty(n, objlabels, Value.makeTemporaryStr("undefined"), true, state);
     v = UnknownValueResolver.join(v, state.readPropertyValue(objlabels, "undefined"), state);
   }
   if (maybe_null && !read_null) {
     m.visitReadProperty(n, objlabels, Value.makeTemporaryStr("null"), true, state);
     v = UnknownValueResolver.join(v, state.readPropertyValue(objlabels, "null"), state);
   }
   if (maybe_nan && !read_nan) {
     m.visitReadProperty(n, objlabels, Value.makeTemporaryStr("NaN"), true, state);
     v = UnknownValueResolver.join(v, state.readPropertyValue(objlabels, "NaN"), state);
   }
   // remove all the TAJS hooks, which are spurious if accessed through a dynamic property
   if (!n.isPropertyFixed()) {
     v = JSGlobal.removeTAJSSpecificFunctions(v);
   }
   m.visitVariableOrProperty(
       n.getPropertyString(), n.getSourceLocation(), v, state.getContext(), state);
   m.visitRead(n, v, state);
   if (v.isNotPresent() && !Options.get().isPropagateDeadFlow()) {
     state.setToNone();
     return;
   }
   // store the resulting value
   if (n.getResultRegister() != AbstractNode.NO_VALUE)
     state.writeRegister(n.getResultRegister(), v);
 }