erik.corry@gmail.com | ed49e96 | 2012-04-17 11:57:53 +0000 | [diff] [blame] | 1 | // Copyright 2012 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 | #include "v8.h" |
| 29 | |
| 30 | #include "accessors.h" |
| 31 | #include "api.h" |
sgjesse@chromium.org | c514574 | 2009-10-07 09:00:33 +0000 | [diff] [blame] | 32 | #include "arguments.h" |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 33 | #include "bootstrapper.h" |
| 34 | #include "compiler.h" |
| 35 | #include "debug.h" |
| 36 | #include "execution.h" |
| 37 | #include "global-handles.h" |
| 38 | #include "natives.h" |
| 39 | #include "runtime.h" |
vegorov@chromium.org | 21b5e95 | 2010-11-23 10:24:40 +0000 | [diff] [blame] | 40 | #include "string-search.h" |
ager@chromium.org | c4c9272 | 2009-11-18 14:12:51 +0000 | [diff] [blame] | 41 | #include "stub-cache.h" |
kasperl@chromium.org | a555126 | 2010-12-07 12:49:48 +0000 | [diff] [blame] | 42 | #include "vm-state-inl.h" |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 43 | |
kasperl@chromium.org | 71affb5 | 2009-05-26 05:44:31 +0000 | [diff] [blame] | 44 | namespace v8 { |
| 45 | namespace internal { |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 46 | |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 47 | |
ager@chromium.org | ddb913d | 2009-01-27 10:01:48 +0000 | [diff] [blame] | 48 | int HandleScope::NumberOfHandles() { |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 49 | Isolate* isolate = Isolate::Current(); |
| 50 | HandleScopeImplementer* impl = isolate->handle_scope_implementer(); |
| 51 | int n = impl->blocks()->length(); |
ager@chromium.org | ddb913d | 2009-01-27 10:01:48 +0000 | [diff] [blame] | 52 | if (n == 0) return 0; |
ager@chromium.org | c4c9272 | 2009-11-18 14:12:51 +0000 | [diff] [blame] | 53 | return ((n - 1) * kHandleBlockSize) + static_cast<int>( |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 54 | (isolate->handle_scope_data()->next - impl->blocks()->last())); |
ager@chromium.org | ddb913d | 2009-01-27 10:01:48 +0000 | [diff] [blame] | 55 | } |
| 56 | |
| 57 | |
ager@chromium.org | 18ad94b | 2009-09-02 08:22:29 +0000 | [diff] [blame] | 58 | Object** HandleScope::Extend() { |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 59 | Isolate* isolate = Isolate::Current(); |
| 60 | v8::ImplementationUtilities::HandleScopeData* current = |
| 61 | isolate->handle_scope_data(); |
ager@chromium.org | ddb913d | 2009-01-27 10:01:48 +0000 | [diff] [blame] | 62 | |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 63 | Object** result = current->next; |
| 64 | |
| 65 | ASSERT(result == current->limit); |
ager@chromium.org | 3b45ab5 | 2009-03-19 22:21:34 +0000 | [diff] [blame] | 66 | // Make sure there's at least one scope on the stack and that the |
| 67 | // top of the scope stack isn't a barrier. |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 68 | if (current->level == 0) { |
ager@chromium.org | 3b45ab5 | 2009-03-19 22:21:34 +0000 | [diff] [blame] | 69 | Utils::ReportApiFailure("v8::HandleScope::CreateHandle()", |
| 70 | "Cannot create a handle without a HandleScope"); |
| 71 | return NULL; |
| 72 | } |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 73 | HandleScopeImplementer* impl = isolate->handle_scope_implementer(); |
ager@chromium.org | 3b45ab5 | 2009-03-19 22:21:34 +0000 | [diff] [blame] | 74 | // If there's more room in the last block, we use that. This is used |
| 75 | // for fast creation of scopes after scope barriers. |
sgjesse@chromium.org | c514574 | 2009-10-07 09:00:33 +0000 | [diff] [blame] | 76 | if (!impl->blocks()->is_empty()) { |
| 77 | Object** limit = &impl->blocks()->last()[kHandleBlockSize]; |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 78 | if (current->limit != limit) { |
| 79 | current->limit = limit; |
| 80 | ASSERT(limit - current->next < kHandleBlockSize); |
ager@chromium.org | ddb913d | 2009-01-27 10:01:48 +0000 | [diff] [blame] | 81 | } |
| 82 | } |
| 83 | |
ager@chromium.org | 3b45ab5 | 2009-03-19 22:21:34 +0000 | [diff] [blame] | 84 | // If we still haven't found a slot for the handle, we extend the |
| 85 | // current handle scope by allocating a new handle block. |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 86 | if (result == current->limit) { |
ager@chromium.org | 3b45ab5 | 2009-03-19 22:21:34 +0000 | [diff] [blame] | 87 | // If there's a spare block, use it for growing the current scope. |
| 88 | result = impl->GetSpareOrNewBlock(); |
| 89 | // Add the extension to the global list of blocks, but count the |
| 90 | // extension as part of the current scope. |
sgjesse@chromium.org | c514574 | 2009-10-07 09:00:33 +0000 | [diff] [blame] | 91 | impl->blocks()->Add(result); |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 92 | current->limit = &result[kHandleBlockSize]; |
ager@chromium.org | 3b45ab5 | 2009-03-19 22:21:34 +0000 | [diff] [blame] | 93 | } |
| 94 | |
ager@chromium.org | ddb913d | 2009-01-27 10:01:48 +0000 | [diff] [blame] | 95 | return result; |
| 96 | } |
| 97 | |
| 98 | |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 99 | void HandleScope::DeleteExtensions(Isolate* isolate) { |
| 100 | ASSERT(isolate == Isolate::Current()); |
| 101 | v8::ImplementationUtilities::HandleScopeData* current = |
| 102 | isolate->handle_scope_data(); |
| 103 | isolate->handle_scope_implementer()->DeleteExtensions(current->limit); |
ager@chromium.org | ddb913d | 2009-01-27 10:01:48 +0000 | [diff] [blame] | 104 | } |
| 105 | |
| 106 | |
ager@chromium.org | 18ad94b | 2009-09-02 08:22:29 +0000 | [diff] [blame] | 107 | void HandleScope::ZapRange(Object** start, Object** end) { |
lrn@chromium.org | 303ada7 | 2010-10-27 09:33:13 +0000 | [diff] [blame] | 108 | ASSERT(end - start <= kHandleBlockSize); |
| 109 | for (Object** p = start; p != end; p++) { |
ager@chromium.org | 18ad94b | 2009-09-02 08:22:29 +0000 | [diff] [blame] | 110 | *reinterpret_cast<Address*>(p) = v8::internal::kHandleZapValue; |
ager@chromium.org | ddb913d | 2009-01-27 10:01:48 +0000 | [diff] [blame] | 111 | } |
| 112 | } |
| 113 | |
| 114 | |
lrn@chromium.org | 303ada7 | 2010-10-27 09:33:13 +0000 | [diff] [blame] | 115 | Address HandleScope::current_level_address() { |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 116 | return reinterpret_cast<Address>( |
| 117 | &Isolate::Current()->handle_scope_data()->level); |
ager@chromium.org | c4c9272 | 2009-11-18 14:12:51 +0000 | [diff] [blame] | 118 | } |
| 119 | |
| 120 | |
| 121 | Address HandleScope::current_next_address() { |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 122 | return reinterpret_cast<Address>( |
| 123 | &Isolate::Current()->handle_scope_data()->next); |
ager@chromium.org | c4c9272 | 2009-11-18 14:12:51 +0000 | [diff] [blame] | 124 | } |
| 125 | |
| 126 | |
| 127 | Address HandleScope::current_limit_address() { |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 128 | return reinterpret_cast<Address>( |
| 129 | &Isolate::Current()->handle_scope_data()->limit); |
ager@chromium.org | c4c9272 | 2009-11-18 14:12:51 +0000 | [diff] [blame] | 130 | } |
| 131 | |
| 132 | |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 133 | Handle<FixedArray> AddKeysFromJSArray(Handle<FixedArray> content, |
| 134 | Handle<JSArray> array) { |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 135 | CALL_HEAP_FUNCTION(content->GetIsolate(), |
| 136 | content->AddKeysFromJSArray(*array), FixedArray); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 137 | } |
| 138 | |
| 139 | |
| 140 | Handle<FixedArray> UnionOfKeys(Handle<FixedArray> first, |
| 141 | Handle<FixedArray> second) { |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 142 | CALL_HEAP_FUNCTION(first->GetIsolate(), |
| 143 | first->UnionOfKeys(*second), FixedArray); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 144 | } |
| 145 | |
| 146 | |
kasperl@chromium.org | 5a8ca6c | 2008-10-23 13:57:19 +0000 | [diff] [blame] | 147 | Handle<JSGlobalProxy> ReinitializeJSGlobalProxy( |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 148 | Handle<JSFunction> constructor, |
kasperl@chromium.org | 5a8ca6c | 2008-10-23 13:57:19 +0000 | [diff] [blame] | 149 | Handle<JSGlobalProxy> global) { |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 150 | CALL_HEAP_FUNCTION( |
| 151 | constructor->GetIsolate(), |
| 152 | constructor->GetHeap()->ReinitializeJSGlobalProxy(*constructor, *global), |
| 153 | JSGlobalProxy); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 154 | } |
| 155 | |
| 156 | |
| 157 | void SetExpectedNofProperties(Handle<JSFunction> func, int nof) { |
whesse@chromium.org | 4a1fe7d | 2010-09-27 12:32:04 +0000 | [diff] [blame] | 158 | // If objects constructed from this function exist then changing |
ager@chromium.org | beb2571 | 2010-11-29 08:02:25 +0000 | [diff] [blame] | 159 | // 'estimated_nof_properties' is dangerous since the previous value might |
whesse@chromium.org | 4a1fe7d | 2010-09-27 12:32:04 +0000 | [diff] [blame] | 160 | // have been compiled into the fast construct stub. More over, the inobject |
| 161 | // slack tracking logic might have adjusted the previous value, so even |
| 162 | // passing the same value is risky. |
| 163 | if (func->shared()->live_objects_may_exist()) return; |
| 164 | |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 165 | func->shared()->set_expected_nof_properties(nof); |
| 166 | if (func->has_initial_map()) { |
| 167 | Handle<Map> new_initial_map = |
verwaest@chromium.org | 753aee4 | 2012-07-17 16:15:42 +0000 | [diff] [blame^] | 168 | func->GetIsolate()->factory()->CopyMap( |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 169 | Handle<Map>(func->initial_map())); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 170 | new_initial_map->set_unused_property_fields(nof); |
| 171 | func->set_initial_map(*new_initial_map); |
| 172 | } |
| 173 | } |
| 174 | |
| 175 | |
| 176 | void SetPrototypeProperty(Handle<JSFunction> func, Handle<JSObject> value) { |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 177 | CALL_HEAP_FUNCTION_VOID(func->GetIsolate(), |
| 178 | func->SetPrototype(*value)); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 179 | } |
| 180 | |
| 181 | |
kasperl@chromium.org | 41044eb | 2008-10-06 08:24:46 +0000 | [diff] [blame] | 182 | static int ExpectedNofPropertiesFromEstimate(int estimate) { |
whesse@chromium.org | 4a1fe7d | 2010-09-27 12:32:04 +0000 | [diff] [blame] | 183 | // If no properties are added in the constructor, they are more likely |
| 184 | // to be added later. |
| 185 | if (estimate == 0) estimate = 2; |
| 186 | |
| 187 | // We do not shrink objects that go into a snapshot (yet), so we adjust |
| 188 | // the estimate conservatively. |
| 189 | if (Serializer::enabled()) return estimate + 2; |
| 190 | |
| 191 | // Inobject slack tracking will reclaim redundant inobject space later, |
| 192 | // so we can afford to adjust the estimate generously. |
rossberg@chromium.org | b4b2aa6 | 2011-10-13 09:49:59 +0000 | [diff] [blame] | 193 | if (FLAG_clever_optimizations) { |
| 194 | return estimate + 8; |
| 195 | } else { |
| 196 | return estimate + 3; |
| 197 | } |
kasperl@chromium.org | 41044eb | 2008-10-06 08:24:46 +0000 | [diff] [blame] | 198 | } |
| 199 | |
| 200 | |
| 201 | void SetExpectedNofPropertiesFromEstimate(Handle<SharedFunctionInfo> shared, |
| 202 | int estimate) { |
whesse@chromium.org | 4a1fe7d | 2010-09-27 12:32:04 +0000 | [diff] [blame] | 203 | // See the comment in SetExpectedNofProperties. |
| 204 | if (shared->live_objects_may_exist()) return; |
| 205 | |
kasperl@chromium.org | 41044eb | 2008-10-06 08:24:46 +0000 | [diff] [blame] | 206 | shared->set_expected_nof_properties( |
| 207 | ExpectedNofPropertiesFromEstimate(estimate)); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 208 | } |
| 209 | |
| 210 | |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 211 | void FlattenString(Handle<String> string) { |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 212 | CALL_HEAP_FUNCTION_VOID(string->GetIsolate(), string->TryFlatten()); |
lrn@chromium.org | 32d961d | 2010-06-30 09:09:34 +0000 | [diff] [blame] | 213 | } |
| 214 | |
| 215 | |
| 216 | Handle<String> FlattenGetString(Handle<String> string) { |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 217 | CALL_HEAP_FUNCTION(string->GetIsolate(), string->TryFlatten(), String); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 218 | } |
| 219 | |
| 220 | |
| 221 | Handle<Object> SetPrototype(Handle<JSFunction> function, |
| 222 | Handle<Object> prototype) { |
kmillikin@chromium.org | 4111b80 | 2010-05-03 10:34:42 +0000 | [diff] [blame] | 223 | ASSERT(function->should_have_prototype()); |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 224 | CALL_HEAP_FUNCTION(function->GetIsolate(), |
| 225 | Accessors::FunctionSetPrototype(*function, |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 226 | *prototype, |
| 227 | NULL), |
| 228 | Object); |
| 229 | } |
| 230 | |
| 231 | |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 232 | Handle<Object> SetProperty(Handle<Object> object, |
| 233 | Handle<Object> key, |
| 234 | Handle<Object> value, |
ager@chromium.org | 9ee27ae | 2011-03-02 13:43:26 +0000 | [diff] [blame] | 235 | PropertyAttributes attributes, |
karlklose@chromium.org | 8f806e8 | 2011-03-07 14:06:08 +0000 | [diff] [blame] | 236 | StrictModeFlag strict_mode) { |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 237 | Isolate* isolate = Isolate::Current(); |
kasperl@chromium.org | 41044eb | 2008-10-06 08:24:46 +0000 | [diff] [blame] | 238 | CALL_HEAP_FUNCTION( |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 239 | isolate, |
| 240 | Runtime::SetObjectProperty( |
| 241 | isolate, object, key, value, attributes, strict_mode), |
ager@chromium.org | 9ee27ae | 2011-03-02 13:43:26 +0000 | [diff] [blame] | 242 | Object); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 243 | } |
| 244 | |
| 245 | |
ager@chromium.org | 65dad4b | 2009-04-23 08:48:43 +0000 | [diff] [blame] | 246 | Handle<Object> ForceSetProperty(Handle<JSObject> object, |
| 247 | Handle<Object> key, |
| 248 | Handle<Object> value, |
| 249 | PropertyAttributes attributes) { |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 250 | Isolate* isolate = object->GetIsolate(); |
ager@chromium.org | 65dad4b | 2009-04-23 08:48:43 +0000 | [diff] [blame] | 251 | CALL_HEAP_FUNCTION( |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 252 | isolate, |
karlklose@chromium.org | 8f806e8 | 2011-03-07 14:06:08 +0000 | [diff] [blame] | 253 | Runtime::ForceSetObjectProperty( |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 254 | isolate, object, key, value, attributes), |
karlklose@chromium.org | 8f806e8 | 2011-03-07 14:06:08 +0000 | [diff] [blame] | 255 | Object); |
ager@chromium.org | 65dad4b | 2009-04-23 08:48:43 +0000 | [diff] [blame] | 256 | } |
| 257 | |
| 258 | |
ager@chromium.org | e2902be | 2009-06-08 12:21:35 +0000 | [diff] [blame] | 259 | Handle<Object> ForceDeleteProperty(Handle<JSObject> object, |
| 260 | Handle<Object> key) { |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 261 | Isolate* isolate = object->GetIsolate(); |
| 262 | CALL_HEAP_FUNCTION(isolate, |
| 263 | Runtime::ForceDeleteObjectProperty(isolate, object, key), |
| 264 | Object); |
ager@chromium.org | e2902be | 2009-06-08 12:21:35 +0000 | [diff] [blame] | 265 | } |
| 266 | |
| 267 | |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 268 | Handle<Object> SetPropertyWithInterceptor(Handle<JSObject> object, |
| 269 | Handle<String> key, |
| 270 | Handle<Object> value, |
ager@chromium.org | 9ee27ae | 2011-03-02 13:43:26 +0000 | [diff] [blame] | 271 | PropertyAttributes attributes, |
karlklose@chromium.org | 8f806e8 | 2011-03-07 14:06:08 +0000 | [diff] [blame] | 272 | StrictModeFlag strict_mode) { |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 273 | CALL_HEAP_FUNCTION(object->GetIsolate(), |
| 274 | object->SetPropertyWithInterceptor(*key, |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 275 | *value, |
ager@chromium.org | 9ee27ae | 2011-03-02 13:43:26 +0000 | [diff] [blame] | 276 | attributes, |
karlklose@chromium.org | 8f806e8 | 2011-03-07 14:06:08 +0000 | [diff] [blame] | 277 | strict_mode), |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 278 | Object); |
| 279 | } |
| 280 | |
| 281 | |
ricow@chromium.org | d2be901 | 2011-06-01 06:00:58 +0000 | [diff] [blame] | 282 | Handle<Object> GetProperty(Handle<JSReceiver> obj, |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 283 | const char* name) { |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 284 | Isolate* isolate = obj->GetIsolate(); |
| 285 | Handle<String> str = isolate->factory()->LookupAsciiSymbol(name); |
| 286 | CALL_HEAP_FUNCTION(isolate, obj->GetProperty(*str), Object); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 287 | } |
| 288 | |
| 289 | |
| 290 | Handle<Object> GetProperty(Handle<Object> obj, |
| 291 | Handle<Object> key) { |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 292 | Isolate* isolate = Isolate::Current(); |
| 293 | CALL_HEAP_FUNCTION(isolate, |
| 294 | Runtime::GetObjectProperty(isolate, obj, key), Object); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 295 | } |
| 296 | |
| 297 | |
| 298 | Handle<Object> GetPropertyWithInterceptor(Handle<JSObject> receiver, |
| 299 | Handle<JSObject> holder, |
| 300 | Handle<String> name, |
| 301 | PropertyAttributes* attributes) { |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 302 | Isolate* isolate = receiver->GetIsolate(); |
| 303 | CALL_HEAP_FUNCTION(isolate, |
| 304 | holder->GetPropertyWithInterceptor(*receiver, |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 305 | *name, |
| 306 | attributes), |
| 307 | Object); |
| 308 | } |
| 309 | |
| 310 | |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 311 | Handle<Object> SetPrototype(Handle<JSObject> obj, Handle<Object> value) { |
| 312 | const bool skip_hidden_prototypes = false; |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 313 | CALL_HEAP_FUNCTION(obj->GetIsolate(), |
| 314 | obj->SetPrototype(*value, skip_hidden_prototypes), Object); |
| 315 | } |
| 316 | |
| 317 | |
mads.s.ager@gmail.com | 9a4089a | 2008-09-01 08:55:01 +0000 | [diff] [blame] | 318 | Handle<Object> LookupSingleCharacterStringFromCode(uint32_t index) { |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 319 | Isolate* isolate = Isolate::Current(); |
| 320 | CALL_HEAP_FUNCTION( |
| 321 | isolate, |
| 322 | isolate->heap()->LookupSingleCharacterStringFromCode(index), Object); |
mads.s.ager@gmail.com | 9a4089a | 2008-09-01 08:55:01 +0000 | [diff] [blame] | 323 | } |
| 324 | |
| 325 | |
ager@chromium.org | ce5e87b | 2010-03-10 10:24:18 +0000 | [diff] [blame] | 326 | Handle<String> SubString(Handle<String> str, |
| 327 | int start, |
| 328 | int end, |
| 329 | PretenureFlag pretenure) { |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 330 | CALL_HEAP_FUNCTION(str->GetIsolate(), |
| 331 | str->SubString(start, end, pretenure), String); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 332 | } |
| 333 | |
| 334 | |
kasperl@chromium.org | 5a8ca6c | 2008-10-23 13:57:19 +0000 | [diff] [blame] | 335 | Handle<JSObject> Copy(Handle<JSObject> obj) { |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 336 | Isolate* isolate = obj->GetIsolate(); |
| 337 | CALL_HEAP_FUNCTION(isolate, |
| 338 | isolate->heap()->CopyJSObject(*obj), JSObject); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 339 | } |
| 340 | |
| 341 | |
kmillikin@chromium.org | 9155e25 | 2010-05-26 13:27:57 +0000 | [diff] [blame] | 342 | Handle<Object> SetAccessor(Handle<JSObject> obj, Handle<AccessorInfo> info) { |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 343 | CALL_HEAP_FUNCTION(obj->GetIsolate(), obj->DefineAccessor(*info), Object); |
kmillikin@chromium.org | 9155e25 | 2010-05-26 13:27:57 +0000 | [diff] [blame] | 344 | } |
| 345 | |
| 346 | |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 347 | // Wrappers for scripts are kept alive and cached in weak global |
ager@chromium.org | ea91cc5 | 2011-05-23 06:06:11 +0000 | [diff] [blame] | 348 | // handles referred from foreign objects held by the scripts as long as |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 349 | // they are used. When they are not used anymore, the garbage |
| 350 | // collector will call the weak callback on the global handle |
| 351 | // associated with the wrapper and get rid of both the wrapper and the |
| 352 | // handle. |
kasperl@chromium.org | 5a8ca6c | 2008-10-23 13:57:19 +0000 | [diff] [blame] | 353 | static void ClearWrapperCache(Persistent<v8::Value> handle, void*) { |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 354 | Handle<Object> cache = Utils::OpenHandle(*handle); |
| 355 | JSValue* wrapper = JSValue::cast(*cache); |
ager@chromium.org | ea91cc5 | 2011-05-23 06:06:11 +0000 | [diff] [blame] | 356 | Foreign* foreign = Script::cast(wrapper->value())->wrapper(); |
jkummerow@chromium.org | c3b3712 | 2011-11-07 10:14:12 +0000 | [diff] [blame] | 357 | ASSERT(foreign->foreign_address() == |
| 358 | reinterpret_cast<Address>(cache.location())); |
| 359 | foreign->set_foreign_address(0); |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 360 | Isolate* isolate = Isolate::Current(); |
| 361 | isolate->global_handles()->Destroy(cache.location()); |
| 362 | isolate->counters()->script_wrappers()->Decrement(); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 363 | } |
| 364 | |
| 365 | |
| 366 | Handle<JSValue> GetScriptWrapper(Handle<Script> script) { |
jkummerow@chromium.org | c3b3712 | 2011-11-07 10:14:12 +0000 | [diff] [blame] | 367 | if (script->wrapper()->foreign_address() != NULL) { |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 368 | // Return the script wrapper directly from the cache. |
kasperl@chromium.org | 68ac009 | 2009-07-09 06:00:35 +0000 | [diff] [blame] | 369 | return Handle<JSValue>( |
jkummerow@chromium.org | c3b3712 | 2011-11-07 10:14:12 +0000 | [diff] [blame] | 370 | reinterpret_cast<JSValue**>(script->wrapper()->foreign_address())); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 371 | } |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 372 | Isolate* isolate = Isolate::Current(); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 373 | // Construct a new script wrapper. |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 374 | isolate->counters()->script_wrappers()->Increment(); |
| 375 | Handle<JSFunction> constructor = isolate->script_function(); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 376 | Handle<JSValue> result = |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 377 | Handle<JSValue>::cast(isolate->factory()->NewJSObject(constructor)); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 378 | result->set_value(*script); |
| 379 | |
| 380 | // Create a new weak global handle and use it to cache the wrapper |
| 381 | // for future use. The cache will automatically be cleared by the |
| 382 | // garbage collector when it is not used anymore. |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 383 | Handle<Object> handle = isolate->global_handles()->Create(*result); |
| 384 | isolate->global_handles()->MakeWeak(handle.location(), NULL, |
| 385 | &ClearWrapperCache); |
jkummerow@chromium.org | c3b3712 | 2011-11-07 10:14:12 +0000 | [diff] [blame] | 386 | script->wrapper()->set_foreign_address( |
| 387 | reinterpret_cast<Address>(handle.location())); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 388 | return result; |
| 389 | } |
| 390 | |
| 391 | |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 392 | // Init line_ends array with code positions of line ends inside script |
| 393 | // source. |
| 394 | void InitScriptLineEnds(Handle<Script> script) { |
sgjesse@chromium.org | 499aaa5 | 2009-11-30 08:07:20 +0000 | [diff] [blame] | 395 | if (!script->line_ends()->IsUndefined()) return; |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 396 | |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 397 | Isolate* isolate = script->GetIsolate(); |
| 398 | |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 399 | if (!script->source()->IsString()) { |
| 400 | ASSERT(script->source()->IsUndefined()); |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 401 | Handle<FixedArray> empty = isolate->factory()->NewFixedArray(0); |
whesse@chromium.org | 4a1fe7d | 2010-09-27 12:32:04 +0000 | [diff] [blame] | 402 | script->set_line_ends(*empty); |
sgjesse@chromium.org | 499aaa5 | 2009-11-30 08:07:20 +0000 | [diff] [blame] | 403 | ASSERT(script->line_ends()->IsFixedArray()); |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 404 | return; |
| 405 | } |
| 406 | |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 407 | Handle<String> src(String::cast(script->source()), isolate); |
ricow@chromium.org | c9c8082 | 2010-04-21 08:22:37 +0000 | [diff] [blame] | 408 | |
| 409 | Handle<FixedArray> array = CalculateLineEnds(src, true); |
| 410 | |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 411 | if (*array != isolate->heap()->empty_fixed_array()) { |
| 412 | array->set_map(isolate->heap()->fixed_cow_array_map()); |
erik.corry@gmail.com | 4a6c327 | 2010-11-18 12:04:40 +0000 | [diff] [blame] | 413 | } |
| 414 | |
ricow@chromium.org | c9c8082 | 2010-04-21 08:22:37 +0000 | [diff] [blame] | 415 | script->set_line_ends(*array); |
| 416 | ASSERT(script->line_ends()->IsFixedArray()); |
| 417 | } |
| 418 | |
| 419 | |
vegorov@chromium.org | 21b5e95 | 2010-11-23 10:24:40 +0000 | [diff] [blame] | 420 | template <typename SourceChar> |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 421 | static void CalculateLineEnds(Isolate* isolate, |
| 422 | List<int>* line_ends, |
vegorov@chromium.org | 21b5e95 | 2010-11-23 10:24:40 +0000 | [diff] [blame] | 423 | Vector<const SourceChar> src, |
| 424 | bool with_last_line) { |
| 425 | const int src_len = src.length(); |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 426 | StringSearch<char, SourceChar> search(isolate, CStrVector("\n")); |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 427 | |
vegorov@chromium.org | 21b5e95 | 2010-11-23 10:24:40 +0000 | [diff] [blame] | 428 | // Find and record line ends. |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 429 | int position = 0; |
| 430 | while (position != -1 && position < src_len) { |
vegorov@chromium.org | 21b5e95 | 2010-11-23 10:24:40 +0000 | [diff] [blame] | 431 | position = search.Search(src, position); |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 432 | if (position != -1) { |
vegorov@chromium.org | 21b5e95 | 2010-11-23 10:24:40 +0000 | [diff] [blame] | 433 | line_ends->Add(position); |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 434 | position++; |
vegorov@chromium.org | 21b5e95 | 2010-11-23 10:24:40 +0000 | [diff] [blame] | 435 | } else if (with_last_line) { |
ricow@chromium.org | c9c8082 | 2010-04-21 08:22:37 +0000 | [diff] [blame] | 436 | // Even if the last line misses a line end, it is counted. |
vegorov@chromium.org | 21b5e95 | 2010-11-23 10:24:40 +0000 | [diff] [blame] | 437 | line_ends->Add(src_len); |
| 438 | return; |
ricow@chromium.org | c9c8082 | 2010-04-21 08:22:37 +0000 | [diff] [blame] | 439 | } |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 440 | } |
vegorov@chromium.org | 21b5e95 | 2010-11-23 10:24:40 +0000 | [diff] [blame] | 441 | } |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 442 | |
vegorov@chromium.org | 21b5e95 | 2010-11-23 10:24:40 +0000 | [diff] [blame] | 443 | |
| 444 | Handle<FixedArray> CalculateLineEnds(Handle<String> src, |
| 445 | bool with_last_line) { |
| 446 | src = FlattenGetString(src); |
| 447 | // Rough estimate of line count based on a roughly estimated average |
| 448 | // length of (unpacked) code. |
| 449 | int line_count_estimate = src->length() >> 4; |
| 450 | List<int> line_ends(line_count_estimate); |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 451 | Isolate* isolate = src->GetIsolate(); |
vegorov@chromium.org | 21b5e95 | 2010-11-23 10:24:40 +0000 | [diff] [blame] | 452 | { |
| 453 | AssertNoAllocation no_heap_allocation; // ensure vectors stay valid. |
| 454 | // Dispatch on type of strings. |
ricow@chromium.org | ddd545c | 2011-08-24 12:02:41 +0000 | [diff] [blame] | 455 | String::FlatContent content = src->GetFlatContent(); |
| 456 | ASSERT(content.IsFlat()); |
| 457 | if (content.IsAscii()) { |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 458 | CalculateLineEnds(isolate, |
| 459 | &line_ends, |
ricow@chromium.org | ddd545c | 2011-08-24 12:02:41 +0000 | [diff] [blame] | 460 | content.ToAsciiVector(), |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 461 | with_last_line); |
vegorov@chromium.org | 21b5e95 | 2010-11-23 10:24:40 +0000 | [diff] [blame] | 462 | } else { |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 463 | CalculateLineEnds(isolate, |
| 464 | &line_ends, |
ricow@chromium.org | ddd545c | 2011-08-24 12:02:41 +0000 | [diff] [blame] | 465 | content.ToUC16Vector(), |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 466 | with_last_line); |
vegorov@chromium.org | 21b5e95 | 2010-11-23 10:24:40 +0000 | [diff] [blame] | 467 | } |
| 468 | } |
| 469 | int line_count = line_ends.length(); |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 470 | Handle<FixedArray> array = isolate->factory()->NewFixedArray(line_count); |
vegorov@chromium.org | 21b5e95 | 2010-11-23 10:24:40 +0000 | [diff] [blame] | 471 | for (int i = 0; i < line_count; i++) { |
| 472 | array->set(i, Smi::FromInt(line_ends[i])); |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 473 | } |
ricow@chromium.org | c9c8082 | 2010-04-21 08:22:37 +0000 | [diff] [blame] | 474 | return array; |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 475 | } |
| 476 | |
| 477 | |
| 478 | // Convert code position into line number. |
| 479 | int GetScriptLineNumber(Handle<Script> script, int code_pos) { |
| 480 | InitScriptLineEnds(script); |
| 481 | AssertNoAllocation no_allocation; |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 482 | FixedArray* line_ends_array = FixedArray::cast(script->line_ends()); |
ager@chromium.org | c4c9272 | 2009-11-18 14:12:51 +0000 | [diff] [blame] | 483 | const int line_ends_len = line_ends_array->length(); |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 484 | |
vegorov@chromium.org | 21b5e95 | 2010-11-23 10:24:40 +0000 | [diff] [blame] | 485 | if (!line_ends_len) return -1; |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 486 | |
vegorov@chromium.org | 21b5e95 | 2010-11-23 10:24:40 +0000 | [diff] [blame] | 487 | if ((Smi::cast(line_ends_array->get(0)))->value() >= code_pos) { |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 488 | return script->line_offset()->value(); |
vegorov@chromium.org | 21b5e95 | 2010-11-23 10:24:40 +0000 | [diff] [blame] | 489 | } |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 490 | |
| 491 | int left = 0; |
| 492 | int right = line_ends_len; |
| 493 | while (int half = (right - left) / 2) { |
| 494 | if ((Smi::cast(line_ends_array->get(left + half)))->value() > code_pos) { |
| 495 | right -= half; |
| 496 | } else { |
| 497 | left += half; |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 498 | } |
| 499 | } |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 500 | return right + script->line_offset()->value(); |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 501 | } |
| 502 | |
danno@chromium.org | c612e02 | 2011-11-10 11:38:15 +0000 | [diff] [blame] | 503 | // Convert code position into column number. |
| 504 | int GetScriptColumnNumber(Handle<Script> script, int code_pos) { |
| 505 | int line_number = GetScriptLineNumber(script, code_pos); |
| 506 | if (line_number == -1) return -1; |
| 507 | |
| 508 | AssertNoAllocation no_allocation; |
| 509 | FixedArray* line_ends_array = FixedArray::cast(script->line_ends()); |
| 510 | line_number = line_number - script->line_offset()->value(); |
| 511 | if (line_number == 0) return code_pos + script->column_offset()->value(); |
| 512 | int prev_line_end_pos = |
| 513 | Smi::cast(line_ends_array->get(line_number - 1))->value(); |
| 514 | return code_pos - (prev_line_end_pos + 1); |
| 515 | } |
kasperl@chromium.org | 7be3c99 | 2009-03-12 07:19:55 +0000 | [diff] [blame] | 516 | |
whesse@chromium.org | cec079d | 2010-03-22 14:44:04 +0000 | [diff] [blame] | 517 | int GetScriptLineNumberSafe(Handle<Script> script, int code_pos) { |
| 518 | AssertNoAllocation no_allocation; |
| 519 | if (!script->line_ends()->IsUndefined()) { |
| 520 | return GetScriptLineNumber(script, code_pos); |
| 521 | } |
| 522 | // Slow mode: we do not have line_ends. We have to iterate through source. |
| 523 | if (!script->source()->IsString()) { |
| 524 | return -1; |
| 525 | } |
| 526 | String* source = String::cast(script->source()); |
| 527 | int line = 0; |
| 528 | int len = source->length(); |
| 529 | for (int pos = 0; pos < len; pos++) { |
| 530 | if (pos == code_pos) { |
| 531 | break; |
| 532 | } |
| 533 | if (source->Get(pos) == '\n') { |
| 534 | line++; |
| 535 | } |
| 536 | } |
| 537 | return line; |
| 538 | } |
| 539 | |
| 540 | |
sgjesse@chromium.org | c514574 | 2009-10-07 09:00:33 +0000 | [diff] [blame] | 541 | void CustomArguments::IterateInstance(ObjectVisitor* v) { |
ager@chromium.org | b26c50a | 2010-03-26 09:27:16 +0000 | [diff] [blame] | 542 | v->VisitPointers(values_, values_ + ARRAY_SIZE(values_)); |
sgjesse@chromium.org | c514574 | 2009-10-07 09:00:33 +0000 | [diff] [blame] | 543 | } |
| 544 | |
| 545 | |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 546 | // Compute the property keys from the interceptor. |
erik.corry@gmail.com | 394dbcf | 2011-10-27 07:38:48 +0000 | [diff] [blame] | 547 | v8::Handle<v8::Array> GetKeysForNamedInterceptor(Handle<JSReceiver> receiver, |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 548 | Handle<JSObject> object) { |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 549 | Isolate* isolate = receiver->GetIsolate(); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 550 | Handle<InterceptorInfo> interceptor(object->GetNamedInterceptor()); |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 551 | CustomArguments args(isolate, interceptor->data(), *receiver, *object); |
sgjesse@chromium.org | c514574 | 2009-10-07 09:00:33 +0000 | [diff] [blame] | 552 | v8::AccessorInfo info(args.end()); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 553 | v8::Handle<v8::Array> result; |
| 554 | if (!interceptor->enumerator()->IsUndefined()) { |
| 555 | v8::NamedPropertyEnumerator enum_fun = |
| 556 | v8::ToCData<v8::NamedPropertyEnumerator>(interceptor->enumerator()); |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 557 | LOG(isolate, ApiObjectAccess("interceptor-named-enum", *object)); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 558 | { |
| 559 | // Leaving JavaScript. |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 560 | VMState state(isolate, EXTERNAL); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 561 | result = enum_fun(info); |
| 562 | } |
| 563 | } |
| 564 | return result; |
| 565 | } |
| 566 | |
| 567 | |
| 568 | // Compute the element keys from the interceptor. |
erik.corry@gmail.com | 394dbcf | 2011-10-27 07:38:48 +0000 | [diff] [blame] | 569 | v8::Handle<v8::Array> GetKeysForIndexedInterceptor(Handle<JSReceiver> receiver, |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 570 | Handle<JSObject> object) { |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 571 | Isolate* isolate = receiver->GetIsolate(); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 572 | Handle<InterceptorInfo> interceptor(object->GetIndexedInterceptor()); |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 573 | CustomArguments args(isolate, interceptor->data(), *receiver, *object); |
sgjesse@chromium.org | c514574 | 2009-10-07 09:00:33 +0000 | [diff] [blame] | 574 | v8::AccessorInfo info(args.end()); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 575 | v8::Handle<v8::Array> result; |
| 576 | if (!interceptor->enumerator()->IsUndefined()) { |
| 577 | v8::IndexedPropertyEnumerator enum_fun = |
| 578 | v8::ToCData<v8::IndexedPropertyEnumerator>(interceptor->enumerator()); |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 579 | LOG(isolate, ApiObjectAccess("interceptor-indexed-enum", *object)); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 580 | { |
| 581 | // Leaving JavaScript. |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 582 | VMState state(isolate, EXTERNAL); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 583 | result = enum_fun(info); |
| 584 | } |
| 585 | } |
| 586 | return result; |
| 587 | } |
| 588 | |
| 589 | |
ager@chromium.org | b61a0d1 | 2010-10-13 08:35:23 +0000 | [diff] [blame] | 590 | static bool ContainsOnlyValidKeys(Handle<FixedArray> array) { |
| 591 | int len = array->length(); |
| 592 | for (int i = 0; i < len; i++) { |
| 593 | Object* e = array->get(i); |
| 594 | if (!(e->IsString() || e->IsNumber())) return false; |
| 595 | } |
| 596 | return true; |
| 597 | } |
| 598 | |
| 599 | |
erik.corry@gmail.com | 394dbcf | 2011-10-27 07:38:48 +0000 | [diff] [blame] | 600 | Handle<FixedArray> GetKeysInFixedArrayFor(Handle<JSReceiver> object, |
| 601 | KeyCollectionType type, |
| 602 | bool* threw) { |
ager@chromium.org | b61a0d1 | 2010-10-13 08:35:23 +0000 | [diff] [blame] | 603 | USE(ContainsOnlyValidKeys); |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 604 | Isolate* isolate = object->GetIsolate(); |
| 605 | Handle<FixedArray> content = isolate->factory()->empty_fixed_array(); |
| 606 | Handle<JSObject> arguments_boilerplate = Handle<JSObject>( |
| 607 | isolate->context()->global_context()->arguments_boilerplate(), |
| 608 | isolate); |
| 609 | Handle<JSFunction> arguments_function = Handle<JSFunction>( |
| 610 | JSFunction::cast(arguments_boilerplate->map()->constructor()), |
| 611 | isolate); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 612 | |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 613 | // Only collect keys if access is permitted. |
christian.plesner.hansen@gmail.com | 2bc58ef | 2009-09-22 10:00:30 +0000 | [diff] [blame] | 614 | for (Handle<Object> p = object; |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 615 | *p != isolate->heap()->null_value(); |
| 616 | p = Handle<Object>(p->GetPrototype(), isolate)) { |
erik.corry@gmail.com | 394dbcf | 2011-10-27 07:38:48 +0000 | [diff] [blame] | 617 | if (p->IsJSProxy()) { |
| 618 | Handle<JSProxy> proxy(JSProxy::cast(*p), isolate); |
| 619 | Handle<Object> args[] = { proxy }; |
| 620 | Handle<Object> names = Execution::Call( |
| 621 | isolate->proxy_enumerate(), object, ARRAY_SIZE(args), args, threw); |
| 622 | if (*threw) return content; |
| 623 | content = AddKeysFromJSArray(content, Handle<JSArray>::cast(names)); |
| 624 | break; |
| 625 | } |
| 626 | |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 627 | Handle<JSObject> current(JSObject::cast(*p), isolate); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 628 | |
christian.plesner.hansen@gmail.com | 2bc58ef | 2009-09-22 10:00:30 +0000 | [diff] [blame] | 629 | // Check access rights if required. |
| 630 | if (current->IsAccessCheckNeeded() && |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 631 | !isolate->MayNamedAccess(*current, |
| 632 | isolate->heap()->undefined_value(), |
| 633 | v8::ACCESS_KEYS)) { |
| 634 | isolate->ReportFailedAccessCheck(*current, v8::ACCESS_KEYS); |
christian.plesner.hansen@gmail.com | 2bc58ef | 2009-09-22 10:00:30 +0000 | [diff] [blame] | 635 | break; |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 636 | } |
christian.plesner.hansen@gmail.com | 2bc58ef | 2009-09-22 10:00:30 +0000 | [diff] [blame] | 637 | |
| 638 | // Compute the element keys. |
| 639 | Handle<FixedArray> element_keys = |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 640 | isolate->factory()->NewFixedArray(current->NumberOfEnumElements()); |
christian.plesner.hansen@gmail.com | 2bc58ef | 2009-09-22 10:00:30 +0000 | [diff] [blame] | 641 | current->GetEnumElementKeys(*element_keys); |
| 642 | content = UnionOfKeys(content, element_keys); |
ager@chromium.org | b61a0d1 | 2010-10-13 08:35:23 +0000 | [diff] [blame] | 643 | ASSERT(ContainsOnlyValidKeys(content)); |
christian.plesner.hansen@gmail.com | 2bc58ef | 2009-09-22 10:00:30 +0000 | [diff] [blame] | 644 | |
| 645 | // Add the element keys from the interceptor. |
| 646 | if (current->HasIndexedInterceptor()) { |
| 647 | v8::Handle<v8::Array> result = |
| 648 | GetKeysForIndexedInterceptor(object, current); |
| 649 | if (!result.IsEmpty()) |
| 650 | content = AddKeysFromJSArray(content, v8::Utils::OpenHandle(*result)); |
ager@chromium.org | b61a0d1 | 2010-10-13 08:35:23 +0000 | [diff] [blame] | 651 | ASSERT(ContainsOnlyValidKeys(content)); |
christian.plesner.hansen@gmail.com | 2bc58ef | 2009-09-22 10:00:30 +0000 | [diff] [blame] | 652 | } |
| 653 | |
sgjesse@chromium.org | ac6aa17 | 2009-12-04 12:29:05 +0000 | [diff] [blame] | 654 | // We can cache the computed property keys if access checks are |
| 655 | // not needed and no interceptors are involved. |
| 656 | // |
| 657 | // We do not use the cache if the object has elements and |
| 658 | // therefore it does not make sense to cache the property names |
| 659 | // for arguments objects. Arguments objects will always have |
| 660 | // elements. |
fschneider@chromium.org | ed78ffd | 2010-07-21 11:05:19 +0000 | [diff] [blame] | 661 | // Wrapped strings have elements, but don't have an elements |
| 662 | // array or dictionary. So the fast inline test for whether to |
| 663 | // use the cache says yes, so we should not create a cache. |
sgjesse@chromium.org | ac6aa17 | 2009-12-04 12:29:05 +0000 | [diff] [blame] | 664 | bool cache_enum_keys = |
| 665 | ((current->map()->constructor() != *arguments_function) && |
fschneider@chromium.org | ed78ffd | 2010-07-21 11:05:19 +0000 | [diff] [blame] | 666 | !current->IsJSValue() && |
sgjesse@chromium.org | ac6aa17 | 2009-12-04 12:29:05 +0000 | [diff] [blame] | 667 | !current->IsAccessCheckNeeded() && |
| 668 | !current->HasNamedInterceptor() && |
| 669 | !current->HasIndexedInterceptor()); |
| 670 | // Compute the property keys and cache them if possible. |
| 671 | content = |
| 672 | UnionOfKeys(content, GetEnumPropertyKeys(current, cache_enum_keys)); |
ager@chromium.org | b61a0d1 | 2010-10-13 08:35:23 +0000 | [diff] [blame] | 673 | ASSERT(ContainsOnlyValidKeys(content)); |
christian.plesner.hansen@gmail.com | 2bc58ef | 2009-09-22 10:00:30 +0000 | [diff] [blame] | 674 | |
| 675 | // Add the property keys from the interceptor. |
| 676 | if (current->HasNamedInterceptor()) { |
| 677 | v8::Handle<v8::Array> result = |
| 678 | GetKeysForNamedInterceptor(object, current); |
| 679 | if (!result.IsEmpty()) |
| 680 | content = AddKeysFromJSArray(content, v8::Utils::OpenHandle(*result)); |
ager@chromium.org | b61a0d1 | 2010-10-13 08:35:23 +0000 | [diff] [blame] | 681 | ASSERT(ContainsOnlyValidKeys(content)); |
christian.plesner.hansen@gmail.com | 2bc58ef | 2009-09-22 10:00:30 +0000 | [diff] [blame] | 682 | } |
| 683 | |
| 684 | // If we only want local properties we bail out after the first |
| 685 | // iteration. |
| 686 | if (type == LOCAL_ONLY) |
| 687 | break; |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 688 | } |
| 689 | return content; |
| 690 | } |
| 691 | |
| 692 | |
erik.corry@gmail.com | 394dbcf | 2011-10-27 07:38:48 +0000 | [diff] [blame] | 693 | Handle<JSArray> GetKeysFor(Handle<JSReceiver> object, bool* threw) { |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 694 | Isolate* isolate = object->GetIsolate(); |
| 695 | isolate->counters()->for_in()->Increment(); |
erik.corry@gmail.com | 394dbcf | 2011-10-27 07:38:48 +0000 | [diff] [blame] | 696 | Handle<FixedArray> elements = |
| 697 | GetKeysInFixedArrayFor(object, INCLUDE_PROTOS, threw); |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 698 | return isolate->factory()->NewJSArrayWithElements(elements); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 699 | } |
| 700 | |
| 701 | |
sgjesse@chromium.org | ac6aa17 | 2009-12-04 12:29:05 +0000 | [diff] [blame] | 702 | Handle<FixedArray> GetEnumPropertyKeys(Handle<JSObject> object, |
| 703 | bool cache_result) { |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 704 | int index = 0; |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 705 | Isolate* isolate = object->GetIsolate(); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 706 | if (object->HasFastProperties()) { |
| 707 | if (object->map()->instance_descriptors()->HasEnumCache()) { |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 708 | isolate->counters()->enum_cache_hits()->Increment(); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 709 | DescriptorArray* desc = object->map()->instance_descriptors(); |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 710 | return Handle<FixedArray>(FixedArray::cast(desc->GetEnumCache()), |
| 711 | isolate); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 712 | } |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 713 | isolate->counters()->enum_cache_misses()->Increment(); |
kmillikin@chromium.org | be6bd10 | 2012-02-23 08:45:21 +0000 | [diff] [blame] | 714 | Handle<Map> map(object->map()); |
jkummerow@chromium.org | ab7dad4 | 2012-02-07 12:07:34 +0000 | [diff] [blame] | 715 | int num_enum = object->NumberOfLocalProperties(DONT_ENUM); |
kmillikin@chromium.org | be6bd10 | 2012-02-23 08:45:21 +0000 | [diff] [blame] | 716 | |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 717 | Handle<FixedArray> storage = isolate->factory()->NewFixedArray(num_enum); |
| 718 | Handle<FixedArray> sort_array = isolate->factory()->NewFixedArray(num_enum); |
kmillikin@chromium.org | be6bd10 | 2012-02-23 08:45:21 +0000 | [diff] [blame] | 719 | |
| 720 | Handle<FixedArray> indices; |
| 721 | Handle<FixedArray> sort_array2; |
| 722 | |
| 723 | if (cache_result) { |
| 724 | indices = isolate->factory()->NewFixedArray(num_enum); |
| 725 | sort_array2 = isolate->factory()->NewFixedArray(num_enum); |
| 726 | } |
| 727 | |
kasperl@chromium.org | defbd10 | 2009-07-13 14:04:26 +0000 | [diff] [blame] | 728 | Handle<DescriptorArray> descs = |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 729 | Handle<DescriptorArray>(object->map()->instance_descriptors(), isolate); |
kmillikin@chromium.org | be6bd10 | 2012-02-23 08:45:21 +0000 | [diff] [blame] | 730 | |
kasperl@chromium.org | defbd10 | 2009-07-13 14:04:26 +0000 | [diff] [blame] | 731 | for (int i = 0; i < descs->number_of_descriptors(); i++) { |
yangguo@chromium.org | 99aa490 | 2012-07-06 16:21:55 +0000 | [diff] [blame] | 732 | if (!descs->GetDetails(i).IsDontEnum()) { |
kmillikin@chromium.org | be6bd10 | 2012-02-23 08:45:21 +0000 | [diff] [blame] | 733 | storage->set(index, descs->GetKey(i)); |
erik.corry@gmail.com | ed49e96 | 2012-04-17 11:57:53 +0000 | [diff] [blame] | 734 | PropertyDetails details = descs->GetDetails(i); |
kmillikin@chromium.org | be6bd10 | 2012-02-23 08:45:21 +0000 | [diff] [blame] | 735 | sort_array->set(index, Smi::FromInt(details.index())); |
| 736 | if (!indices.is_null()) { |
| 737 | if (details.type() != FIELD) { |
| 738 | indices = Handle<FixedArray>(); |
| 739 | sort_array2 = Handle<FixedArray>(); |
| 740 | } else { |
| 741 | int field_index = Descriptor::IndexFromValue(descs->GetValue(i)); |
| 742 | if (field_index >= map->inobject_properties()) { |
| 743 | field_index = -(field_index - map->inobject_properties() + 1); |
| 744 | } |
| 745 | indices->set(index, Smi::FromInt(field_index)); |
| 746 | sort_array2->set(index, Smi::FromInt(details.index())); |
| 747 | } |
| 748 | } |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 749 | index++; |
| 750 | } |
| 751 | } |
kmillikin@chromium.org | be6bd10 | 2012-02-23 08:45:21 +0000 | [diff] [blame] | 752 | storage->SortPairs(*sort_array, sort_array->length()); |
| 753 | if (!indices.is_null()) { |
| 754 | indices->SortPairs(*sort_array2, sort_array2->length()); |
| 755 | } |
sgjesse@chromium.org | ac6aa17 | 2009-12-04 12:29:05 +0000 | [diff] [blame] | 756 | if (cache_result) { |
| 757 | Handle<FixedArray> bridge_storage = |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 758 | isolate->factory()->NewFixedArray( |
| 759 | DescriptorArray::kEnumCacheBridgeLength); |
sgjesse@chromium.org | ac6aa17 | 2009-12-04 12:29:05 +0000 | [diff] [blame] | 760 | DescriptorArray* desc = object->map()->instance_descriptors(); |
kmillikin@chromium.org | be6bd10 | 2012-02-23 08:45:21 +0000 | [diff] [blame] | 761 | desc->SetEnumCache(*bridge_storage, |
| 762 | *storage, |
| 763 | indices.is_null() ? Object::cast(Smi::FromInt(0)) |
| 764 | : Object::cast(*indices)); |
sgjesse@chromium.org | ac6aa17 | 2009-12-04 12:29:05 +0000 | [diff] [blame] | 765 | } |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 766 | ASSERT(storage->length() == index); |
| 767 | return storage; |
| 768 | } else { |
jkummerow@chromium.org | ab7dad4 | 2012-02-07 12:07:34 +0000 | [diff] [blame] | 769 | int num_enum = object->NumberOfLocalProperties(DONT_ENUM); |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 770 | Handle<FixedArray> storage = isolate->factory()->NewFixedArray(num_enum); |
| 771 | Handle<FixedArray> sort_array = isolate->factory()->NewFixedArray(num_enum); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 772 | object->property_dictionary()->CopyEnumKeysTo(*storage, *sort_array); |
| 773 | return storage; |
| 774 | } |
| 775 | } |
| 776 | |
| 777 | |
erik.corry@gmail.com | 394dbcf | 2011-10-27 07:38:48 +0000 | [diff] [blame] | 778 | Handle<ObjectHashSet> ObjectHashSetAdd(Handle<ObjectHashSet> table, |
| 779 | Handle<Object> key) { |
| 780 | CALL_HEAP_FUNCTION(table->GetIsolate(), |
| 781 | table->Add(*key), |
| 782 | ObjectHashSet); |
| 783 | } |
| 784 | |
| 785 | |
| 786 | Handle<ObjectHashSet> ObjectHashSetRemove(Handle<ObjectHashSet> table, |
| 787 | Handle<Object> key) { |
| 788 | CALL_HEAP_FUNCTION(table->GetIsolate(), |
| 789 | table->Remove(*key), |
| 790 | ObjectHashSet); |
| 791 | } |
| 792 | |
| 793 | |
vegorov@chromium.org | 7943d46 | 2011-08-01 11:41:52 +0000 | [diff] [blame] | 794 | Handle<ObjectHashTable> PutIntoObjectHashTable(Handle<ObjectHashTable> table, |
erik.corry@gmail.com | 394dbcf | 2011-10-27 07:38:48 +0000 | [diff] [blame] | 795 | Handle<Object> key, |
vegorov@chromium.org | 7943d46 | 2011-08-01 11:41:52 +0000 | [diff] [blame] | 796 | Handle<Object> value) { |
| 797 | CALL_HEAP_FUNCTION(table->GetIsolate(), |
| 798 | table->Put(*key, *value), |
| 799 | ObjectHashTable); |
| 800 | } |
| 801 | |
| 802 | |
yangguo@chromium.org | 154ff99 | 2012-03-13 08:09:54 +0000 | [diff] [blame] | 803 | // This method determines the type of string involved and then gets the UTF8 |
| 804 | // length of the string. It doesn't flatten the string and has log(n) recursion |
| 805 | // for a string of length n. If the failure flag gets set, then we have to |
| 806 | // flatten the string and retry. Failures are caused by surrogate pairs in deep |
| 807 | // cons strings. |
| 808 | |
| 809 | // Single surrogate characters that are encountered in the UTF-16 character |
| 810 | // sequence of the input string get counted as 3 UTF-8 bytes, because that |
| 811 | // is the way that WriteUtf8 will encode them. Surrogate pairs are counted and |
| 812 | // encoded as one 4-byte UTF-8 sequence. |
| 813 | |
| 814 | // This function conceptually uses recursion on the two halves of cons strings. |
| 815 | // However, in order to avoid the recursion going too deep it recurses on the |
| 816 | // second string of the cons, but iterates on the first substring (by manually |
| 817 | // eliminating it as a tail recursion). This means it counts the UTF-8 length |
| 818 | // from the end to the start, which makes no difference to the total. |
| 819 | |
| 820 | // Surrogate pairs are recognized even if they are split across two sides of a |
| 821 | // cons, which complicates the implementation somewhat. Therefore, too deep |
| 822 | // recursion cannot always be avoided. This case is detected, and the failure |
| 823 | // flag is set, a signal to the caller that the string should be flattened and |
| 824 | // the operation retried. |
| 825 | int Utf8LengthHelper(String* input, |
| 826 | int from, |
| 827 | int to, |
| 828 | bool followed_by_surrogate, |
| 829 | int max_recursion, |
| 830 | bool* failure, |
| 831 | bool* starts_with_surrogate) { |
| 832 | if (from == to) return 0; |
| 833 | int total = 0; |
| 834 | bool dummy; |
| 835 | while (true) { |
| 836 | if (input->IsAsciiRepresentation()) { |
| 837 | *starts_with_surrogate = false; |
| 838 | return total + to - from; |
| 839 | } |
| 840 | switch (StringShape(input).representation_tag()) { |
| 841 | case kConsStringTag: { |
| 842 | ConsString* str = ConsString::cast(input); |
| 843 | String* first = str->first(); |
| 844 | String* second = str->second(); |
| 845 | int first_length = first->length(); |
| 846 | if (first_length - from > to - first_length) { |
| 847 | if (first_length < to) { |
| 848 | // Right hand side is shorter. No need to check the recursion depth |
| 849 | // since this can only happen log(n) times. |
| 850 | bool right_starts_with_surrogate = false; |
| 851 | total += Utf8LengthHelper(second, |
| 852 | 0, |
| 853 | to - first_length, |
| 854 | followed_by_surrogate, |
| 855 | max_recursion - 1, |
| 856 | failure, |
| 857 | &right_starts_with_surrogate); |
| 858 | if (*failure) return 0; |
| 859 | followed_by_surrogate = right_starts_with_surrogate; |
| 860 | input = first; |
| 861 | to = first_length; |
| 862 | } else { |
| 863 | // We only need the left hand side. |
| 864 | input = first; |
| 865 | } |
| 866 | } else { |
| 867 | if (first_length > from) { |
| 868 | // Left hand side is shorter. |
| 869 | if (first->IsAsciiRepresentation()) { |
| 870 | total += first_length - from; |
| 871 | *starts_with_surrogate = false; |
| 872 | starts_with_surrogate = &dummy; |
| 873 | input = second; |
| 874 | from = 0; |
| 875 | to -= first_length; |
| 876 | } else if (second->IsAsciiRepresentation()) { |
| 877 | followed_by_surrogate = false; |
| 878 | total += to - first_length; |
| 879 | input = first; |
| 880 | to = first_length; |
| 881 | } else if (max_recursion > 0) { |
| 882 | bool right_starts_with_surrogate = false; |
| 883 | // Recursing on the long one. This may fail. |
| 884 | total += Utf8LengthHelper(second, |
| 885 | 0, |
| 886 | to - first_length, |
| 887 | followed_by_surrogate, |
| 888 | max_recursion - 1, |
| 889 | failure, |
| 890 | &right_starts_with_surrogate); |
| 891 | if (*failure) return 0; |
| 892 | input = first; |
| 893 | to = first_length; |
| 894 | followed_by_surrogate = right_starts_with_surrogate; |
| 895 | } else { |
| 896 | *failure = true; |
| 897 | return 0; |
| 898 | } |
| 899 | } else { |
| 900 | // We only need the right hand side. |
| 901 | input = second; |
| 902 | from = 0; |
| 903 | to -= first_length; |
| 904 | } |
| 905 | } |
| 906 | continue; |
| 907 | } |
| 908 | case kExternalStringTag: |
| 909 | case kSeqStringTag: { |
| 910 | Vector<const uc16> vector = input->GetFlatContent().ToUC16Vector(); |
| 911 | const uc16* p = vector.start(); |
| 912 | int previous = unibrow::Utf16::kNoPreviousCharacter; |
| 913 | for (int i = from; i < to; i++) { |
| 914 | uc16 c = p[i]; |
| 915 | total += unibrow::Utf8::Length(c, previous); |
| 916 | previous = c; |
| 917 | } |
| 918 | if (to - from > 0) { |
| 919 | if (unibrow::Utf16::IsLeadSurrogate(previous) && |
| 920 | followed_by_surrogate) { |
| 921 | total -= unibrow::Utf8::kBytesSavedByCombiningSurrogates; |
| 922 | } |
| 923 | if (unibrow::Utf16::IsTrailSurrogate(p[from])) { |
| 924 | *starts_with_surrogate = true; |
| 925 | } |
| 926 | } |
| 927 | return total; |
| 928 | } |
| 929 | case kSlicedStringTag: { |
| 930 | SlicedString* str = SlicedString::cast(input); |
| 931 | int offset = str->offset(); |
| 932 | input = str->parent(); |
| 933 | from += offset; |
| 934 | to += offset; |
| 935 | continue; |
| 936 | } |
| 937 | default: |
| 938 | break; |
| 939 | } |
| 940 | UNREACHABLE(); |
| 941 | return 0; |
| 942 | } |
| 943 | return 0; |
| 944 | } |
| 945 | |
| 946 | |
| 947 | int Utf8Length(Handle<String> str) { |
| 948 | bool dummy; |
| 949 | bool failure; |
| 950 | int len; |
| 951 | const int kRecursionBudget = 100; |
| 952 | do { |
| 953 | failure = false; |
| 954 | len = Utf8LengthHelper( |
| 955 | *str, 0, str->length(), false, kRecursionBudget, &failure, &dummy); |
| 956 | if (failure) FlattenString(str); |
| 957 | } while (failure); |
| 958 | return len; |
| 959 | } |
| 960 | |
yangguo@chromium.org | 99aa490 | 2012-07-06 16:21:55 +0000 | [diff] [blame] | 961 | |
| 962 | DeferredHandleScope::DeferredHandleScope(Isolate* isolate) |
| 963 | : impl_(isolate->handle_scope_implementer()) { |
| 964 | ASSERT(impl_->isolate() == Isolate::Current()); |
| 965 | impl_->BeginDeferredScope(); |
| 966 | v8::ImplementationUtilities::HandleScopeData* data = |
| 967 | impl_->isolate()->handle_scope_data(); |
| 968 | Object** new_next = impl_->GetSpareOrNewBlock(); |
| 969 | Object** new_limit = &new_next[kHandleBlockSize]; |
| 970 | ASSERT(data->limit == &impl_->blocks()->last()[kHandleBlockSize]); |
| 971 | impl_->blocks()->Add(new_next); |
| 972 | |
| 973 | #ifdef DEBUG |
| 974 | prev_level_ = data->level; |
| 975 | #endif |
| 976 | data->level++; |
| 977 | prev_limit_ = data->limit; |
| 978 | prev_next_ = data->next; |
| 979 | data->next = new_next; |
| 980 | data->limit = new_limit; |
| 981 | } |
| 982 | |
| 983 | |
| 984 | DeferredHandleScope::~DeferredHandleScope() { |
| 985 | impl_->isolate()->handle_scope_data()->level--; |
| 986 | ASSERT(handles_detached_); |
| 987 | ASSERT(impl_->isolate()->handle_scope_data()->level == prev_level_); |
| 988 | } |
| 989 | |
| 990 | |
| 991 | DeferredHandles* DeferredHandleScope::Detach() { |
| 992 | DeferredHandles* deferred = impl_->Detach(prev_limit_); |
| 993 | v8::ImplementationUtilities::HandleScopeData* data = |
| 994 | impl_->isolate()->handle_scope_data(); |
| 995 | data->next = prev_next_; |
| 996 | data->limit = prev_limit_; |
| 997 | #ifdef DEBUG |
| 998 | handles_detached_ = true; |
| 999 | #endif |
| 1000 | return deferred; |
| 1001 | } |
| 1002 | |
| 1003 | |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1004 | } } // namespace v8::internal |