38 import jdk.nashorn.internal.runtime.ScriptFunctionData;
39 import jdk.nashorn.internal.runtime.ScriptObject;
40 import jdk.nashorn.internal.runtime.AccessorProperty;
41
42 /**
43 * Concrete implementation of ScriptFunction. This sets correct map for the
44 * function objects -- to expose properties like "prototype", "length" etc.
45 */
46 public class ScriptFunctionImpl extends ScriptFunction {
47
48 /** Reference to constructor prototype. */
49 private Object prototype;
50
51 // property map for strict mode functions
52 private static final PropertyMap strictmodemap$;
53 // property map for bound functions
54 private static final PropertyMap boundfunctionmap$;
55 // property map for non-strict, non-bound functions.
56 private static final PropertyMap map$;
57
58 static PropertyMap getInitialMap() {
59 return map$;
60 }
61
62 static PropertyMap getInitialAnonymousMap() {
63 return AnonymousFunction.getInitialMap();
64 }
65
66 static PropertyMap getInitialStrictMap() {
67 return strictmodemap$;
68 }
69
70 static PropertyMap getInitialBoundMap() {
71 return boundfunctionmap$;
72 }
73
74 // Marker object for lazily initialized prototype object
75 private static final Object LAZY_PROTOTYPE = new Object();
76
77 private ScriptFunctionImpl(final String name, final MethodHandle invokeHandle, final MethodHandle[] specs, final Global global) {
78 super(name, invokeHandle, getInitialMap(), null, specs, ScriptFunctionData.IS_BUILTIN_CONSTRUCTOR);
79 init(global);
80 }
81
82 /**
83 * Constructor called by Nasgen generated code, no membercount, use the default map.
84 * Creates builtin functions only.
85 *
86 * @param name name of function
87 * @param invokeHandle handle for invocation
88 * @param specs specialized versions of this method, if available, null otherwise
89 */
90 ScriptFunctionImpl(final String name, final MethodHandle invokeHandle, final MethodHandle[] specs) {
91 this(name, invokeHandle, specs, Global.instance());
92 }
93
94 private ScriptFunctionImpl(final String name, final MethodHandle invokeHandle, final PropertyMap map, final MethodHandle[] specs, final Global global) {
95 super(name, invokeHandle, map.addAll(getInitialMap()), null, specs, ScriptFunctionData.IS_BUILTIN_CONSTRUCTOR);
96 init(global);
97 }
98
99 /**
100 * Constructor called by Nasgen generated code, no membercount, use the map passed as argument.
101 * Creates builtin functions only.
102 *
103 * @param name name of function
104 * @param invokeHandle handle for invocation
105 * @param map initial property map
106 * @param specs specialized versions of this method, if available, null otherwise
107 */
108 ScriptFunctionImpl(final String name, final MethodHandle invokeHandle, final PropertyMap map, final MethodHandle[] specs) {
109 this(name, invokeHandle, map, specs, Global.instance());
110 }
111
112 private ScriptFunctionImpl(final String name, final MethodHandle methodHandle, final ScriptObject scope, final MethodHandle[] specs, final int flags, final Global global) {
113 super(name, methodHandle, getMap(global, isStrict(flags)), scope, specs, flags);
114 init(global);
115 }
116
117 /**
118 * Constructor called by Global.newScriptFunction (runtime).
119 *
120 * @param name name of function
121 * @param methodHandle handle for invocation
122 * @param scope scope object
123 * @param specs specialized versions of this method, if available, null otherwise
124 * @param flags {@link ScriptFunctionData} flags
125 */
126 ScriptFunctionImpl(final String name, final MethodHandle methodHandle, final ScriptObject scope, final MethodHandle[] specs, final int flags) {
127 this(name, methodHandle, scope, specs, flags, Global.instance());
128 }
129
130 private ScriptFunctionImpl(final RecompilableScriptFunctionData data, final ScriptObject scope, final Global global) {
131 super(data, getMap(global, data.isStrict()), scope);
132 init(global);
133 }
134
135 /**
136 * Constructor called by (compiler) generated code for {@link ScriptObject}s.
137 *
138 * @param data static function data
139 * @param scope scope object
140 */
141 public ScriptFunctionImpl(final RecompilableScriptFunctionData data, final ScriptObject scope) {
142 this(data, scope, Global.instance());
143 }
144
145 /**
146 * Only invoked internally from {@link BoundScriptFunctionImpl} constructor.
147 * @param data the script function data for the bound function.
148 * @param global the global object
149 */
150 ScriptFunctionImpl(final ScriptFunctionData data, final Global global) {
151 super(data, getInitialBoundMap(), null);
152 init(global);
153 }
154
155 static {
156 final ArrayList<Property> properties = new ArrayList<>(3);
157 properties.add(AccessorProperty.create("prototype", Property.NOT_ENUMERABLE | Property.NOT_CONFIGURABLE, G$PROTOTYPE, S$PROTOTYPE));
158 properties.add(AccessorProperty.create("length", Property.NOT_ENUMERABLE | Property.NOT_CONFIGURABLE | Property.NOT_WRITABLE, G$LENGTH, null));
159 properties.add(AccessorProperty.create("name", Property.NOT_ENUMERABLE | Property.NOT_CONFIGURABLE | Property.NOT_WRITABLE, G$NAME, null));
160 map$ = PropertyMap.newMap(properties);
161 strictmodemap$ = createStrictModeMap(map$);
162 boundfunctionmap$ = createBoundFunctionMap(strictmodemap$);
163 }
164
165 private static PropertyMap createStrictModeMap(final PropertyMap map) {
166 final int flags = Property.NOT_ENUMERABLE | Property.NOT_CONFIGURABLE;
167 PropertyMap newMap = map;
168 // Need to add properties directly to map since slots are assigned speculatively by newUserAccessors.
169 newMap = newMap.addPropertyNoHistory(map.newUserAccessors("arguments", flags));
170 newMap = newMap.addPropertyNoHistory(map.newUserAccessors("caller", flags));
171 return newMap;
172 }
173
174 private static boolean isStrict(final int flags) {
175 return (flags & ScriptFunctionData.IS_STRICT) != 0;
176 }
177
178 // Choose the map based on strict mode!
179 private static PropertyMap getMap(final Global global, final boolean strict) {
180 return strict ? getInitialStrictMap() : getInitialMap();
181 }
182
183 private static PropertyMap createBoundFunctionMap(final PropertyMap strictModeMap) {
184 // Bound function map is same as strict function map, but additionally lacks the "prototype" property, see
185 // ECMAScript 5.1 section 15.3.4.5
186 return strictModeMap.deleteProperty(strictModeMap.findProperty("prototype"));
187 }
188
189 // Instance of this class is used as global anonymous function which
190 // serves as Function.prototype object.
191 private static class AnonymousFunction extends ScriptFunctionImpl {
192 private static final PropertyMap anonmap$ = PropertyMap.newMap();
193
194 static PropertyMap getInitialMap() {
195 return anonmap$;
196 }
197
198 AnonymousFunction(final Global global) {
199 super("", GlobalFunctions.ANONYMOUS, getInitialAnonymousMap(), null);
200 }
201 }
202
203 static ScriptFunctionImpl newAnonymousFunction(final Global global) {
204 return new AnonymousFunction(global);
205 }
206
207 /**
208 * Factory method for non-constructor built-in functions
209 *
210 * @param name function name
211 * @param methodHandle handle for invocation
212 * @param specs specialized versions of function if available, null otherwise
213 * @return new ScriptFunction
214 */
215 static ScriptFunction makeFunction(final String name, final MethodHandle methodHandle, final MethodHandle[] specs) {
216 final ScriptFunctionImpl func = new ScriptFunctionImpl(name, methodHandle, null, specs, ScriptFunctionData.IS_BUILTIN);
217 func.setPrototype(UNDEFINED);
218 // Non-constructor built-in functions do not have "prototype" property
219 func.deleteOwnProperty(func.getMap().findProperty("prototype"));
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38 import jdk.nashorn.internal.runtime.ScriptFunctionData;
39 import jdk.nashorn.internal.runtime.ScriptObject;
40 import jdk.nashorn.internal.runtime.AccessorProperty;
41
42 /**
43 * Concrete implementation of ScriptFunction. This sets correct map for the
44 * function objects -- to expose properties like "prototype", "length" etc.
45 */
46 public class ScriptFunctionImpl extends ScriptFunction {
47
48 /** Reference to constructor prototype. */
49 private Object prototype;
50
51 // property map for strict mode functions
52 private static final PropertyMap strictmodemap$;
53 // property map for bound functions
54 private static final PropertyMap boundfunctionmap$;
55 // property map for non-strict, non-bound functions.
56 private static final PropertyMap map$;
57
58 // Marker object for lazily initialized prototype object
59 private static final Object LAZY_PROTOTYPE = new Object();
60
61 private ScriptFunctionImpl(final String name, final MethodHandle invokeHandle, final MethodHandle[] specs, final Global global) {
62 super(name, invokeHandle, map$, null, specs, ScriptFunctionData.IS_BUILTIN_CONSTRUCTOR);
63 init(global);
64 }
65
66 /**
67 * Constructor called by Nasgen generated code, no membercount, use the default map.
68 * Creates builtin functions only.
69 *
70 * @param name name of function
71 * @param invokeHandle handle for invocation
72 * @param specs specialized versions of this method, if available, null otherwise
73 */
74 ScriptFunctionImpl(final String name, final MethodHandle invokeHandle, final MethodHandle[] specs) {
75 this(name, invokeHandle, specs, Global.instance());
76 }
77
78 private ScriptFunctionImpl(final String name, final MethodHandle invokeHandle, final PropertyMap map, final MethodHandle[] specs, final Global global) {
79 super(name, invokeHandle, map.addAll(map$), null, specs, ScriptFunctionData.IS_BUILTIN_CONSTRUCTOR);
80 init(global);
81 }
82
83 /**
84 * Constructor called by Nasgen generated code, no membercount, use the map passed as argument.
85 * Creates builtin functions only.
86 *
87 * @param name name of function
88 * @param invokeHandle handle for invocation
89 * @param map initial property map
90 * @param specs specialized versions of this method, if available, null otherwise
91 */
92 ScriptFunctionImpl(final String name, final MethodHandle invokeHandle, final PropertyMap map, final MethodHandle[] specs) {
93 this(name, invokeHandle, map, specs, Global.instance());
94 }
95
96 private ScriptFunctionImpl(final String name, final MethodHandle methodHandle, final ScriptObject scope, final MethodHandle[] specs, final int flags, final Global global) {
97 super(name, methodHandle, getMap(isStrict(flags)), scope, specs, flags);
98 init(global);
99 }
100
101 /**
102 * Constructor called by Global.newScriptFunction (runtime).
103 *
104 * @param name name of function
105 * @param methodHandle handle for invocation
106 * @param scope scope object
107 * @param specs specialized versions of this method, if available, null otherwise
108 * @param flags {@link ScriptFunctionData} flags
109 */
110 ScriptFunctionImpl(final String name, final MethodHandle methodHandle, final ScriptObject scope, final MethodHandle[] specs, final int flags) {
111 this(name, methodHandle, scope, specs, flags, Global.instance());
112 }
113
114 private ScriptFunctionImpl(final RecompilableScriptFunctionData data, final ScriptObject scope, final Global global) {
115 super(data, getMap(data.isStrict()), scope);
116 init(global);
117 }
118
119 /**
120 * Constructor called by (compiler) generated code for {@link ScriptObject}s.
121 *
122 * @param data static function data
123 * @param scope scope object
124 */
125 public ScriptFunctionImpl(final RecompilableScriptFunctionData data, final ScriptObject scope) {
126 this(data, scope, Global.instance());
127 }
128
129 /**
130 * Only invoked internally from {@link BoundScriptFunctionImpl} constructor.
131 * @param data the script function data for the bound function.
132 * @param global the global object
133 */
134 ScriptFunctionImpl(final ScriptFunctionData data, final Global global) {
135 super(data, boundfunctionmap$, null);
136 init(global);
137 }
138
139 static {
140 final ArrayList<Property> properties = new ArrayList<>(3);
141 properties.add(AccessorProperty.create("prototype", Property.NOT_ENUMERABLE | Property.NOT_CONFIGURABLE, G$PROTOTYPE, S$PROTOTYPE));
142 properties.add(AccessorProperty.create("length", Property.NOT_ENUMERABLE | Property.NOT_CONFIGURABLE | Property.NOT_WRITABLE, G$LENGTH, null));
143 properties.add(AccessorProperty.create("name", Property.NOT_ENUMERABLE | Property.NOT_CONFIGURABLE | Property.NOT_WRITABLE, G$NAME, null));
144 map$ = PropertyMap.newMap(properties);
145 strictmodemap$ = createStrictModeMap(map$);
146 boundfunctionmap$ = createBoundFunctionMap(strictmodemap$);
147 }
148
149 private static PropertyMap createStrictModeMap(final PropertyMap map) {
150 final int flags = Property.NOT_ENUMERABLE | Property.NOT_CONFIGURABLE;
151 PropertyMap newMap = map;
152 // Need to add properties directly to map since slots are assigned speculatively by newUserAccessors.
153 newMap = newMap.addPropertyNoHistory(map.newUserAccessors("arguments", flags));
154 newMap = newMap.addPropertyNoHistory(map.newUserAccessors("caller", flags));
155 return newMap;
156 }
157
158 private static boolean isStrict(final int flags) {
159 return (flags & ScriptFunctionData.IS_STRICT) != 0;
160 }
161
162 // Choose the map based on strict mode!
163 private static PropertyMap getMap(final boolean strict) {
164 return strict ? strictmodemap$ : map$;
165 }
166
167 private static PropertyMap createBoundFunctionMap(final PropertyMap strictModeMap) {
168 // Bound function map is same as strict function map, but additionally lacks the "prototype" property, see
169 // ECMAScript 5.1 section 15.3.4.5
170 return strictModeMap.deleteProperty(strictModeMap.findProperty("prototype"));
171 }
172
173 // Instance of this class is used as global anonymous function which
174 // serves as Function.prototype object.
175 private static class AnonymousFunction extends ScriptFunctionImpl {
176 private static final PropertyMap anonmap$ = PropertyMap.newMap();
177
178 AnonymousFunction(final Global global) {
179 super("", GlobalFunctions.ANONYMOUS, anonmap$, null);
180 }
181 }
182
183 static ScriptFunctionImpl newAnonymousFunction(final Global global) {
184 return new AnonymousFunction(global);
185 }
186
187 /**
188 * Factory method for non-constructor built-in functions
189 *
190 * @param name function name
191 * @param methodHandle handle for invocation
192 * @param specs specialized versions of function if available, null otherwise
193 * @return new ScriptFunction
194 */
195 static ScriptFunction makeFunction(final String name, final MethodHandle methodHandle, final MethodHandle[] specs) {
196 final ScriptFunctionImpl func = new ScriptFunctionImpl(name, methodHandle, null, specs, ScriptFunctionData.IS_BUILTIN);
197 func.setPrototype(UNDEFINED);
198 // Non-constructor built-in functions do not have "prototype" property
199 func.deleteOwnProperty(func.getMap().findProperty("prototype"));
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