ager@chromium.org | 9258b6b | 2008-09-11 09:11:10 +0000 | [diff] [blame] | 1 | // Copyright 2006-2008 the V8 project authors. All rights reserved. |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 2 | // Redistribution and use in source and binary forms, with or without |
| 3 | // modification, are permitted provided that the following conditions are |
| 4 | // met: |
| 5 | // |
| 6 | // * Redistributions of source code must retain the above copyright |
| 7 | // notice, this list of conditions and the following disclaimer. |
| 8 | // * Redistributions in binary form must reproduce the above |
| 9 | // copyright notice, this list of conditions and the following |
| 10 | // disclaimer in the documentation and/or other materials provided |
| 11 | // with the distribution. |
| 12 | // * Neither the name of Google Inc. nor the names of its |
| 13 | // contributors may be used to endorse or promote products derived |
| 14 | // from this software without specific prior written permission. |
| 15 | // |
| 16 | // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
| 17 | // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
| 18 | // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
| 19 | // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT |
| 20 | // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
| 21 | // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
| 22 | // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
| 23 | // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
| 24 | // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| 25 | // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
| 26 | // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| 27 | |
| 28 | // This file contains infrastructure used by the API. See |
| 29 | // v8natives.js for an explanation of these files are processed and |
| 30 | // loaded. |
| 31 | |
| 32 | |
| 33 | function CreateDate(time) { |
kmillikin@chromium.org | 5d8f0e6 | 2010-03-24 08:21:20 +0000 | [diff] [blame] | 34 | var date = new $Date(); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 35 | date.setTime(time); |
| 36 | return date; |
kasperl@chromium.org | 41044eb | 2008-10-06 08:24:46 +0000 | [diff] [blame] | 37 | } |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 38 | |
| 39 | |
| 40 | const kApiFunctionCache = {}; |
| 41 | const functionCache = kApiFunctionCache; |
| 42 | |
| 43 | |
kasperl@chromium.org | 41044eb | 2008-10-06 08:24:46 +0000 | [diff] [blame] | 44 | function Instantiate(data, name) { |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 45 | if (!%IsTemplate(data)) return data; |
| 46 | var tag = %GetTemplateField(data, kApiTagOffset); |
| 47 | switch (tag) { |
| 48 | case kFunctionTag: |
kasperl@chromium.org | 41044eb | 2008-10-06 08:24:46 +0000 | [diff] [blame] | 49 | return InstantiateFunction(data, name); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 50 | case kNewObjectTag: |
| 51 | var Constructor = %GetTemplateField(data, kApiConstructorOffset); |
whesse@chromium.org | 4acdc2c | 2011-08-15 13:01:23 +0000 | [diff] [blame] | 52 | // Note: Do not directly use a function template as a condition, our |
| 53 | // internal ToBoolean doesn't handle that! |
| 54 | var result = typeof Constructor === 'undefined' ? |
| 55 | {} : new (Instantiate(Constructor))(); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 56 | ConfigureTemplateInstance(result, data); |
kasperl@chromium.org | defbd10 | 2009-07-13 14:04:26 +0000 | [diff] [blame] | 57 | result = %ToFastProperties(result); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 58 | return result; |
| 59 | default: |
| 60 | throw 'Unknown API tag <' + tag + '>'; |
| 61 | } |
kasperl@chromium.org | 41044eb | 2008-10-06 08:24:46 +0000 | [diff] [blame] | 62 | } |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 63 | |
| 64 | |
kasperl@chromium.org | 41044eb | 2008-10-06 08:24:46 +0000 | [diff] [blame] | 65 | function InstantiateFunction(data, name) { |
ager@chromium.org | 3291210 | 2009-01-16 10:38:43 +0000 | [diff] [blame] | 66 | // We need a reference to kApiFunctionCache in the stack frame |
| 67 | // if we need to bail out from a stack overflow. |
| 68 | var cache = kApiFunctionCache; |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 69 | var serialNumber = %GetTemplateField(data, kApiSerialNumberOffset); |
ager@chromium.org | 3291210 | 2009-01-16 10:38:43 +0000 | [diff] [blame] | 70 | var isFunctionCached = |
| 71 | (serialNumber in cache) && (cache[serialNumber] != kUninitialized); |
| 72 | if (!isFunctionCached) { |
| 73 | try { |
| 74 | cache[serialNumber] = null; |
| 75 | var fun = %CreateApiFunction(data); |
| 76 | if (name) %FunctionSetName(fun, name); |
| 77 | cache[serialNumber] = fun; |
| 78 | var prototype = %GetTemplateField(data, kApiPrototypeTemplateOffset); |
ricow@chromium.org | 2c99e28 | 2011-07-28 09:15:17 +0000 | [diff] [blame] | 79 | var flags = %GetTemplateField(data, kApiFlagOffset); |
whesse@chromium.org | 4acdc2c | 2011-08-15 13:01:23 +0000 | [diff] [blame] | 80 | // Note: Do not directly use an object template as a condition, our |
| 81 | // internal ToBoolean doesn't handle that! |
| 82 | fun.prototype = typeof prototype === 'undefined' ? |
| 83 | {} : Instantiate(prototype); |
ricow@chromium.org | 2c99e28 | 2011-07-28 09:15:17 +0000 | [diff] [blame] | 84 | if (flags & (1 << kReadOnlyPrototypeBit)) { |
| 85 | %FunctionSetReadOnlyPrototype(fun); |
ager@chromium.org | 04921a8 | 2011-06-27 13:21:41 +0000 | [diff] [blame] | 86 | } |
ager@chromium.org | 3291210 | 2009-01-16 10:38:43 +0000 | [diff] [blame] | 87 | %SetProperty(fun.prototype, "constructor", fun, DONT_ENUM); |
| 88 | var parent = %GetTemplateField(data, kApiParentTemplateOffset); |
whesse@chromium.org | 4acdc2c | 2011-08-15 13:01:23 +0000 | [diff] [blame] | 89 | // Note: Do not directly use a function template as a condition, our |
| 90 | // internal ToBoolean doesn't handle that! |
| 91 | if (!(typeof parent === 'undefined')) { |
ager@chromium.org | 3291210 | 2009-01-16 10:38:43 +0000 | [diff] [blame] | 92 | var parent_fun = Instantiate(parent); |
| 93 | fun.prototype.__proto__ = parent_fun.prototype; |
| 94 | } |
| 95 | ConfigureTemplateInstance(fun, data); |
| 96 | } catch (e) { |
| 97 | cache[serialNumber] = kUninitialized; |
| 98 | throw e; |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 99 | } |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 100 | } |
ager@chromium.org | 3291210 | 2009-01-16 10:38:43 +0000 | [diff] [blame] | 101 | return cache[serialNumber]; |
kasperl@chromium.org | 41044eb | 2008-10-06 08:24:46 +0000 | [diff] [blame] | 102 | } |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 103 | |
| 104 | |
| 105 | function ConfigureTemplateInstance(obj, data) { |
| 106 | var properties = %GetTemplateField(data, kApiPropertyListOffset); |
| 107 | if (properties) { |
ager@chromium.org | 870a0b6 | 2008-11-04 11:43:05 +0000 | [diff] [blame] | 108 | // Disable access checks while instantiating the object. |
| 109 | var requires_access_checks = %DisableAccessChecks(obj); |
| 110 | try { |
| 111 | for (var i = 0; i < properties[0]; i += 3) { |
| 112 | var name = properties[i + 1]; |
| 113 | var prop_data = properties[i + 2]; |
| 114 | var attributes = properties[i + 3]; |
| 115 | var value = Instantiate(prop_data, name); |
| 116 | %SetProperty(obj, name, value, attributes); |
| 117 | } |
| 118 | } finally { |
| 119 | if (requires_access_checks) %EnableAccessChecks(obj); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 120 | } |
| 121 | } |
kasperl@chromium.org | 41044eb | 2008-10-06 08:24:46 +0000 | [diff] [blame] | 122 | } |