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1 // Copyright 2011 the V8 project authors. All rights reserved. | 1 // Copyright 2011 the V8 project authors. All rights reserved. |
2 // Redistribution and use in source and binary forms, with or without | 2 // Redistribution and use in source and binary forms, with or without |
3 // modification, are permitted provided that the following conditions are | 3 // modification, are permitted provided that the following conditions are |
4 // met: | 4 // met: |
5 // | 5 // |
6 // * Redistributions of source code must retain the above copyright | 6 // * Redistributions of source code must retain the above copyright |
7 // notice, this list of conditions and the following disclaimer. | 7 // notice, this list of conditions and the following disclaimer. |
8 // * Redistributions in binary form must reproduce the above | 8 // * Redistributions in binary form must reproduce the above |
9 // copyright notice, this list of conditions and the following | 9 // copyright notice, this list of conditions and the following |
10 // disclaimer in the documentation and/or other materials provided | 10 // disclaimer in the documentation and/or other materials provided |
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53 var key = functions[i]; | 53 var key = functions[i]; |
54 var f = functions[i + 1]; | 54 var f = functions[i + 1]; |
55 %FunctionSetName(f, key); | 55 %FunctionSetName(f, key); |
56 %FunctionRemovePrototype(f); | 56 %FunctionRemovePrototype(f); |
57 %SetProperty(object, key, f, attributes); | 57 %SetProperty(object, key, f, attributes); |
58 %SetNativeFlag(f); | 58 %SetNativeFlag(f); |
59 } | 59 } |
60 %ToFastProperties(object); | 60 %ToFastProperties(object); |
61 } | 61 } |
62 | 62 |
63 // Emulates JSC by installing functions on a hidden prototype that | |
64 // lies above the current object/prototype. This lets you override | |
65 // functions on String.prototype etc. and then restore the old function | |
66 // with delete. See http://code.google.com/p/chromium/issues/detail?id=1717 | |
67 function InstallFunctionsOnHiddenPrototype(object, attributes, functions) { | |
68 %CheckIsBootstrapping(); | |
69 var hidden_prototype = new $Object(); | |
70 %SetHiddenPrototype(object, hidden_prototype); | |
71 InstallFunctions(hidden_prototype, attributes, functions); | |
72 } | |
73 | |
74 | |
75 // Prevents changes to the prototype of a built-infunction. | 63 // Prevents changes to the prototype of a built-infunction. |
76 // The "prototype" property of the function object is made non-configurable, | 64 // The "prototype" property of the function object is made non-configurable, |
77 // and the prototype object is made non-extensible. The latter prevents | 65 // and the prototype object is made non-extensible. The latter prevents |
78 // changing the __proto__ property. | 66 // changing the __proto__ property. |
79 function SetUpLockedPrototype(constructor, fields, methods) { | 67 function SetUpLockedPrototype(constructor, fields, methods) { |
80 %CheckIsBootstrapping(); | 68 %CheckIsBootstrapping(); |
81 var prototype = constructor.prototype; | 69 var prototype = constructor.prototype; |
82 // Install functions first, because this function is used to initialize | 70 // Install functions first, because this function is used to initialize |
83 // PropertyDescriptor itself. | 71 // PropertyDescriptor itself. |
84 var property_count = (methods.length >> 1) + (fields ? fields.length : 0); | 72 var property_count = (methods.length >> 1) + (fields ? fields.length : 0); |
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1549 | 1537 |
1550 function SetUpFunction() { | 1538 function SetUpFunction() { |
1551 %CheckIsBootstrapping(); | 1539 %CheckIsBootstrapping(); |
1552 InstallFunctions($Function.prototype, DONT_ENUM, $Array( | 1540 InstallFunctions($Function.prototype, DONT_ENUM, $Array( |
1553 "bind", FunctionBind, | 1541 "bind", FunctionBind, |
1554 "toString", FunctionToString | 1542 "toString", FunctionToString |
1555 )); | 1543 )); |
1556 } | 1544 } |
1557 | 1545 |
1558 SetUpFunction(); | 1546 SetUpFunction(); |
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