Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1 | // Copyright 2006-2009 the V8 project authors. All rights reserved. |
| 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" |
| 32 | #include "arguments.h" |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 33 | #include "codegen.h" |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 34 | #include "execution.h" |
| 35 | #include "ic-inl.h" |
| 36 | #include "runtime.h" |
| 37 | #include "stub-cache.h" |
| 38 | |
| 39 | namespace v8 { |
| 40 | namespace internal { |
| 41 | |
| 42 | #ifdef DEBUG |
| 43 | static char TransitionMarkFromState(IC::State state) { |
| 44 | switch (state) { |
| 45 | case UNINITIALIZED: return '0'; |
| 46 | case PREMONOMORPHIC: return 'P'; |
| 47 | case MONOMORPHIC: return '1'; |
| 48 | case MONOMORPHIC_PROTOTYPE_FAILURE: return '^'; |
| 49 | case MEGAMORPHIC: return 'N'; |
| 50 | |
| 51 | // We never see the debugger states here, because the state is |
| 52 | // computed from the original code - not the patched code. Let |
| 53 | // these cases fall through to the unreachable code below. |
| 54 | case DEBUG_BREAK: break; |
| 55 | case DEBUG_PREPARE_STEP_IN: break; |
| 56 | } |
| 57 | UNREACHABLE(); |
| 58 | return 0; |
| 59 | } |
| 60 | |
| 61 | void IC::TraceIC(const char* type, |
Ben Murdoch | 7f4d5bd | 2010-06-15 11:15:29 +0100 | [diff] [blame] | 62 | Handle<Object> name, |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 63 | State old_state, |
| 64 | Code* new_target, |
| 65 | const char* extra_info) { |
| 66 | if (FLAG_trace_ic) { |
Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [diff] [blame] | 67 | State new_state = StateFrom(new_target, |
| 68 | Heap::undefined_value(), |
| 69 | Heap::undefined_value()); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 70 | PrintF("[%s (%c->%c)%s", type, |
| 71 | TransitionMarkFromState(old_state), |
| 72 | TransitionMarkFromState(new_state), |
| 73 | extra_info); |
| 74 | name->Print(); |
| 75 | PrintF("]\n"); |
| 76 | } |
| 77 | } |
| 78 | #endif |
| 79 | |
| 80 | |
| 81 | IC::IC(FrameDepth depth) { |
| 82 | // To improve the performance of the (much used) IC code, we unfold |
| 83 | // a few levels of the stack frame iteration code. This yields a |
| 84 | // ~35% speedup when running DeltaBlue with the '--nouse-ic' flag. |
| 85 | const Address entry = Top::c_entry_fp(Top::GetCurrentThread()); |
| 86 | Address* pc_address = |
| 87 | reinterpret_cast<Address*>(entry + ExitFrameConstants::kCallerPCOffset); |
| 88 | Address fp = Memory::Address_at(entry + ExitFrameConstants::kCallerFPOffset); |
| 89 | // If there's another JavaScript frame on the stack, we need to look |
| 90 | // one frame further down the stack to find the frame pointer and |
| 91 | // the return address stack slot. |
| 92 | if (depth == EXTRA_CALL_FRAME) { |
| 93 | const int kCallerPCOffset = StandardFrameConstants::kCallerPCOffset; |
| 94 | pc_address = reinterpret_cast<Address*>(fp + kCallerPCOffset); |
| 95 | fp = Memory::Address_at(fp + StandardFrameConstants::kCallerFPOffset); |
| 96 | } |
| 97 | #ifdef DEBUG |
| 98 | StackFrameIterator it; |
| 99 | for (int i = 0; i < depth + 1; i++) it.Advance(); |
| 100 | StackFrame* frame = it.frame(); |
| 101 | ASSERT(fp == frame->fp() && pc_address == frame->pc_address()); |
| 102 | #endif |
| 103 | fp_ = fp; |
| 104 | pc_address_ = pc_address; |
| 105 | } |
| 106 | |
| 107 | |
| 108 | #ifdef ENABLE_DEBUGGER_SUPPORT |
| 109 | Address IC::OriginalCodeAddress() { |
| 110 | HandleScope scope; |
| 111 | // Compute the JavaScript frame for the frame pointer of this IC |
| 112 | // structure. We need this to be able to find the function |
| 113 | // corresponding to the frame. |
| 114 | StackFrameIterator it; |
| 115 | while (it.frame()->fp() != this->fp()) it.Advance(); |
| 116 | JavaScriptFrame* frame = JavaScriptFrame::cast(it.frame()); |
| 117 | // Find the function on the stack and both the active code for the |
| 118 | // function and the original code. |
| 119 | JSFunction* function = JSFunction::cast(frame->function()); |
| 120 | Handle<SharedFunctionInfo> shared(function->shared()); |
| 121 | Code* code = shared->code(); |
| 122 | ASSERT(Debug::HasDebugInfo(shared)); |
| 123 | Code* original_code = Debug::GetDebugInfo(shared)->original_code(); |
| 124 | ASSERT(original_code->IsCode()); |
| 125 | // Get the address of the call site in the active code. This is the |
| 126 | // place where the call to DebugBreakXXX is and where the IC |
| 127 | // normally would be. |
| 128 | Address addr = pc() - Assembler::kCallTargetAddressOffset; |
| 129 | // Return the address in the original code. This is the place where |
| 130 | // the call which has been overwritten by the DebugBreakXXX resides |
| 131 | // and the place where the inline cache system should look. |
Steve Block | d0582a6 | 2009-12-15 09:54:21 +0000 | [diff] [blame] | 132 | intptr_t delta = |
| 133 | original_code->instruction_start() - code->instruction_start(); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 134 | return addr + delta; |
| 135 | } |
| 136 | #endif |
| 137 | |
Steve Block | 8defd9f | 2010-07-08 12:39:36 +0100 | [diff] [blame] | 138 | |
| 139 | static bool HasNormalObjectsInPrototypeChain(LookupResult* lookup, |
| 140 | Object* receiver) { |
| 141 | Object* end = lookup->IsProperty() ? lookup->holder() : Heap::null_value(); |
| 142 | for (Object* current = receiver; |
| 143 | current != end; |
| 144 | current = current->GetPrototype()) { |
| 145 | if (current->IsJSObject() && |
| 146 | !JSObject::cast(current)->HasFastProperties() && |
| 147 | !current->IsJSGlobalProxy() && |
| 148 | !current->IsJSGlobalObject()) { |
| 149 | return true; |
| 150 | } |
| 151 | } |
| 152 | |
| 153 | return false; |
| 154 | } |
| 155 | |
| 156 | |
Ben Murdoch | b8e0da2 | 2011-05-16 14:20:40 +0100 | [diff] [blame] | 157 | static bool TryRemoveInvalidPrototypeDependentStub(Code* target, |
| 158 | Object* receiver, |
| 159 | Object* name) { |
Steve Block | 8defd9f | 2010-07-08 12:39:36 +0100 | [diff] [blame] | 160 | InlineCacheHolderFlag cache_holder = |
| 161 | Code::ExtractCacheHolderFromFlags(target->flags()); |
| 162 | |
Steve Block | 8defd9f | 2010-07-08 12:39:36 +0100 | [diff] [blame] | 163 | if (cache_holder == OWN_MAP && !receiver->IsJSObject()) { |
| 164 | // The stub was generated for JSObject but called for non-JSObject. |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 165 | // IC::GetCodeCacheHolder is not applicable. |
Ben Murdoch | b8e0da2 | 2011-05-16 14:20:40 +0100 | [diff] [blame] | 166 | return false; |
Steve Block | 8defd9f | 2010-07-08 12:39:36 +0100 | [diff] [blame] | 167 | } else if (cache_holder == PROTOTYPE_MAP && |
| 168 | receiver->GetPrototype()->IsNull()) { |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 169 | // IC::GetCodeCacheHolder is not applicable. |
Ben Murdoch | b8e0da2 | 2011-05-16 14:20:40 +0100 | [diff] [blame] | 170 | return false; |
Steve Block | 8defd9f | 2010-07-08 12:39:36 +0100 | [diff] [blame] | 171 | } |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 172 | Map* map = IC::GetCodeCacheHolder(receiver, cache_holder)->map(); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 173 | |
| 174 | // Decide whether the inline cache failed because of changes to the |
| 175 | // receiver itself or changes to one of its prototypes. |
| 176 | // |
| 177 | // If there are changes to the receiver itself, the map of the |
| 178 | // receiver will have changed and the current target will not be in |
| 179 | // the receiver map's code cache. Therefore, if the current target |
| 180 | // is in the receiver map's code cache, the inline cache failed due |
| 181 | // to prototype check failure. |
Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [diff] [blame] | 182 | int index = map->IndexInCodeCache(name, target); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 183 | if (index >= 0) { |
Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [diff] [blame] | 184 | map->RemoveFromCodeCache(String::cast(name), target, index); |
Ben Murdoch | b8e0da2 | 2011-05-16 14:20:40 +0100 | [diff] [blame] | 185 | return true; |
| 186 | } |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 187 | |
Ben Murdoch | b8e0da2 | 2011-05-16 14:20:40 +0100 | [diff] [blame] | 188 | return false; |
| 189 | } |
| 190 | |
| 191 | |
| 192 | IC::State IC::StateFrom(Code* target, Object* receiver, Object* name) { |
| 193 | IC::State state = target->ic_state(); |
| 194 | |
| 195 | if (state != MONOMORPHIC || !name->IsString()) return state; |
| 196 | if (receiver->IsUndefined() || receiver->IsNull()) return state; |
| 197 | |
| 198 | // For keyed load/store/call, the most likely cause of cache failure is |
| 199 | // that the key has changed. We do not distinguish between |
| 200 | // prototype and non-prototype failures for keyed access. |
| 201 | Code::Kind kind = target->kind(); |
| 202 | if (kind == Code::KEYED_LOAD_IC || |
| 203 | kind == Code::KEYED_STORE_IC || |
| 204 | kind == Code::KEYED_CALL_IC) { |
| 205 | return MONOMORPHIC; |
| 206 | } |
| 207 | |
| 208 | // Remove the target from the code cache if it became invalid |
| 209 | // because of changes in the prototype chain to avoid hitting it |
| 210 | // again. |
| 211 | // Call stubs handle this later to allow extra IC state |
| 212 | // transitions. |
| 213 | if (kind != Code::CALL_IC && |
| 214 | TryRemoveInvalidPrototypeDependentStub(target, receiver, name)) { |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 215 | return MONOMORPHIC_PROTOTYPE_FAILURE; |
| 216 | } |
| 217 | |
| 218 | // The builtins object is special. It only changes when JavaScript |
| 219 | // builtins are loaded lazily. It is important to keep inline |
| 220 | // caches for the builtins object monomorphic. Therefore, if we get |
| 221 | // an inline cache miss for the builtins object after lazily loading |
| 222 | // JavaScript builtins, we return uninitialized as the state to |
| 223 | // force the inline cache back to monomorphic state. |
| 224 | if (receiver->IsJSBuiltinsObject()) { |
| 225 | return UNINITIALIZED; |
| 226 | } |
| 227 | |
| 228 | return MONOMORPHIC; |
| 229 | } |
| 230 | |
| 231 | |
| 232 | RelocInfo::Mode IC::ComputeMode() { |
| 233 | Address addr = address(); |
| 234 | Code* code = Code::cast(Heap::FindCodeObject(addr)); |
| 235 | for (RelocIterator it(code, RelocInfo::kCodeTargetMask); |
| 236 | !it.done(); it.next()) { |
| 237 | RelocInfo* info = it.rinfo(); |
| 238 | if (info->pc() == addr) return info->rmode(); |
| 239 | } |
| 240 | UNREACHABLE(); |
| 241 | return RelocInfo::NONE; |
| 242 | } |
| 243 | |
| 244 | |
| 245 | Failure* IC::TypeError(const char* type, |
| 246 | Handle<Object> object, |
Ben Murdoch | 7f4d5bd | 2010-06-15 11:15:29 +0100 | [diff] [blame] | 247 | Handle<Object> key) { |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 248 | HandleScope scope; |
Ben Murdoch | 7f4d5bd | 2010-06-15 11:15:29 +0100 | [diff] [blame] | 249 | Handle<Object> args[2] = { key, object }; |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 250 | Handle<Object> error = Factory::NewTypeError(type, HandleVector(args, 2)); |
| 251 | return Top::Throw(*error); |
| 252 | } |
| 253 | |
| 254 | |
| 255 | Failure* IC::ReferenceError(const char* type, Handle<String> name) { |
| 256 | HandleScope scope; |
| 257 | Handle<Object> error = |
| 258 | Factory::NewReferenceError(type, HandleVector(&name, 1)); |
| 259 | return Top::Throw(*error); |
| 260 | } |
| 261 | |
| 262 | |
| 263 | void IC::Clear(Address address) { |
| 264 | Code* target = GetTargetAtAddress(address); |
| 265 | |
| 266 | // Don't clear debug break inline cache as it will remove the break point. |
| 267 | if (target->ic_state() == DEBUG_BREAK) return; |
| 268 | |
| 269 | switch (target->kind()) { |
| 270 | case Code::LOAD_IC: return LoadIC::Clear(address, target); |
| 271 | case Code::KEYED_LOAD_IC: return KeyedLoadIC::Clear(address, target); |
| 272 | case Code::STORE_IC: return StoreIC::Clear(address, target); |
| 273 | case Code::KEYED_STORE_IC: return KeyedStoreIC::Clear(address, target); |
| 274 | case Code::CALL_IC: return CallIC::Clear(address, target); |
Ben Murdoch | 7f4d5bd | 2010-06-15 11:15:29 +0100 | [diff] [blame] | 275 | case Code::KEYED_CALL_IC: return KeyedCallIC::Clear(address, target); |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 276 | case Code::BINARY_OP_IC: |
| 277 | case Code::TYPE_RECORDING_BINARY_OP_IC: |
| 278 | case Code::COMPARE_IC: |
| 279 | // Clearing these is tricky and does not |
| 280 | // make any performance difference. |
| 281 | return; |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 282 | default: UNREACHABLE(); |
| 283 | } |
| 284 | } |
| 285 | |
| 286 | |
Ben Murdoch | 7f4d5bd | 2010-06-15 11:15:29 +0100 | [diff] [blame] | 287 | void CallICBase::Clear(Address address, Code* target) { |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 288 | State state = target->ic_state(); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 289 | if (state == UNINITIALIZED) return; |
| 290 | Code* code = |
Ben Murdoch | 7f4d5bd | 2010-06-15 11:15:29 +0100 | [diff] [blame] | 291 | StubCache::FindCallInitialize(target->arguments_count(), |
| 292 | target->ic_in_loop(), |
| 293 | target->kind()); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 294 | SetTargetAtAddress(address, code); |
| 295 | } |
| 296 | |
| 297 | |
Kristian Monsen | 50ef84f | 2010-07-29 15:18:00 +0100 | [diff] [blame] | 298 | void KeyedLoadIC::ClearInlinedVersion(Address address) { |
| 299 | // Insert null as the map to check for to make sure the map check fails |
| 300 | // sending control flow to the IC instead of the inlined version. |
| 301 | PatchInlinedLoad(address, Heap::null_value()); |
| 302 | } |
| 303 | |
| 304 | |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 305 | void KeyedLoadIC::Clear(Address address, Code* target) { |
| 306 | if (target->ic_state() == UNINITIALIZED) return; |
| 307 | // Make sure to also clear the map used in inline fast cases. If we |
| 308 | // do not clear these maps, cached code can keep objects alive |
| 309 | // through the embedded maps. |
| 310 | ClearInlinedVersion(address); |
| 311 | SetTargetAtAddress(address, initialize_stub()); |
| 312 | } |
| 313 | |
| 314 | |
Kristian Monsen | 50ef84f | 2010-07-29 15:18:00 +0100 | [diff] [blame] | 315 | void LoadIC::ClearInlinedVersion(Address address) { |
| 316 | // Reset the map check of the inlined inobject property load (if |
| 317 | // present) to guarantee failure by holding an invalid map (the null |
| 318 | // value). The offset can be patched to anything. |
| 319 | PatchInlinedLoad(address, Heap::null_value(), 0); |
Ben Murdoch | f87a203 | 2010-10-22 12:50:53 +0100 | [diff] [blame] | 320 | PatchInlinedContextualLoad(address, |
| 321 | Heap::null_value(), |
| 322 | Heap::null_value(), |
| 323 | true); |
Kristian Monsen | 50ef84f | 2010-07-29 15:18:00 +0100 | [diff] [blame] | 324 | } |
| 325 | |
| 326 | |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 327 | void LoadIC::Clear(Address address, Code* target) { |
| 328 | if (target->ic_state() == UNINITIALIZED) return; |
| 329 | ClearInlinedVersion(address); |
| 330 | SetTargetAtAddress(address, initialize_stub()); |
| 331 | } |
| 332 | |
| 333 | |
Kristian Monsen | 50ef84f | 2010-07-29 15:18:00 +0100 | [diff] [blame] | 334 | void StoreIC::ClearInlinedVersion(Address address) { |
| 335 | // Reset the map check of the inlined inobject property store (if |
| 336 | // present) to guarantee failure by holding an invalid map (the null |
| 337 | // value). The offset can be patched to anything. |
| 338 | PatchInlinedStore(address, Heap::null_value(), 0); |
| 339 | } |
| 340 | |
| 341 | |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 342 | void StoreIC::Clear(Address address, Code* target) { |
| 343 | if (target->ic_state() == UNINITIALIZED) return; |
Kristian Monsen | 50ef84f | 2010-07-29 15:18:00 +0100 | [diff] [blame] | 344 | ClearInlinedVersion(address); |
Steve Block | 1e0659c | 2011-05-24 12:43:12 +0100 | [diff] [blame^] | 345 | SetTargetAtAddress(address, |
| 346 | target->extra_ic_state() == kStoreICStrict |
| 347 | ? initialize_stub_strict() |
| 348 | : initialize_stub()); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 349 | } |
| 350 | |
| 351 | |
Kristian Monsen | 50ef84f | 2010-07-29 15:18:00 +0100 | [diff] [blame] | 352 | void KeyedStoreIC::ClearInlinedVersion(Address address) { |
| 353 | // Insert null as the elements map to check for. This will make |
| 354 | // sure that the elements fast-case map check fails so that control |
| 355 | // flows to the IC instead of the inlined version. |
| 356 | PatchInlinedStore(address, Heap::null_value()); |
| 357 | } |
| 358 | |
| 359 | |
| 360 | void KeyedStoreIC::RestoreInlinedVersion(Address address) { |
| 361 | // Restore the fast-case elements map check so that the inlined |
| 362 | // version can be used again. |
| 363 | PatchInlinedStore(address, Heap::fixed_array_map()); |
| 364 | } |
| 365 | |
| 366 | |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 367 | void KeyedStoreIC::Clear(Address address, Code* target) { |
| 368 | if (target->ic_state() == UNINITIALIZED) return; |
| 369 | SetTargetAtAddress(address, initialize_stub()); |
| 370 | } |
| 371 | |
| 372 | |
| 373 | static bool HasInterceptorGetter(JSObject* object) { |
| 374 | return !object->GetNamedInterceptor()->getter()->IsUndefined(); |
| 375 | } |
| 376 | |
| 377 | |
| 378 | static void LookupForRead(Object* object, |
| 379 | String* name, |
| 380 | LookupResult* lookup) { |
| 381 | AssertNoAllocation no_gc; // pointers must stay valid |
| 382 | |
| 383 | // Skip all the objects with named interceptors, but |
| 384 | // without actual getter. |
| 385 | while (true) { |
| 386 | object->Lookup(name, lookup); |
| 387 | // Besides normal conditions (property not found or it's not |
Andrei Popescu | 402d937 | 2010-02-26 13:31:12 +0000 | [diff] [blame] | 388 | // an interceptor), bail out if lookup is not cacheable: we won't |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 389 | // be able to IC it anyway and regular lookup should work fine. |
Andrei Popescu | 402d937 | 2010-02-26 13:31:12 +0000 | [diff] [blame] | 390 | if (!lookup->IsFound() |
| 391 | || (lookup->type() != INTERCEPTOR) |
| 392 | || !lookup->IsCacheable()) { |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 393 | return; |
| 394 | } |
| 395 | |
| 396 | JSObject* holder = lookup->holder(); |
| 397 | if (HasInterceptorGetter(holder)) { |
| 398 | return; |
| 399 | } |
| 400 | |
| 401 | holder->LocalLookupRealNamedProperty(name, lookup); |
Andrei Popescu | 402d937 | 2010-02-26 13:31:12 +0000 | [diff] [blame] | 402 | if (lookup->IsProperty()) { |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 403 | ASSERT(lookup->type() != INTERCEPTOR); |
| 404 | return; |
| 405 | } |
| 406 | |
| 407 | Object* proto = holder->GetPrototype(); |
| 408 | if (proto->IsNull()) { |
| 409 | lookup->NotFound(); |
| 410 | return; |
| 411 | } |
| 412 | |
| 413 | object = proto; |
| 414 | } |
| 415 | } |
| 416 | |
| 417 | |
Ben Murdoch | 7f4d5bd | 2010-06-15 11:15:29 +0100 | [diff] [blame] | 418 | Object* CallICBase::TryCallAsFunction(Object* object) { |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 419 | HandleScope scope; |
| 420 | Handle<Object> target(object); |
| 421 | Handle<Object> delegate = Execution::GetFunctionDelegate(target); |
| 422 | |
| 423 | if (delegate->IsJSFunction()) { |
| 424 | // Patch the receiver and use the delegate as the function to |
| 425 | // invoke. This is used for invoking objects as if they were |
| 426 | // functions. |
| 427 | const int argc = this->target()->arguments_count(); |
| 428 | StackFrameLocator locator; |
| 429 | JavaScriptFrame* frame = locator.FindJavaScriptFrame(0); |
| 430 | int index = frame->ComputeExpressionsCount() - (argc + 1); |
| 431 | frame->SetExpression(index, *target); |
| 432 | } |
| 433 | |
| 434 | return *delegate; |
| 435 | } |
| 436 | |
Kristian Monsen | 9dcf7e2 | 2010-06-28 14:14:28 +0100 | [diff] [blame] | 437 | |
Ben Murdoch | 7f4d5bd | 2010-06-15 11:15:29 +0100 | [diff] [blame] | 438 | void CallICBase::ReceiverToObject(Handle<Object> object) { |
Leon Clarke | e46be81 | 2010-01-19 14:06:41 +0000 | [diff] [blame] | 439 | HandleScope scope; |
| 440 | Handle<Object> receiver(object); |
| 441 | |
| 442 | // Change the receiver to the result of calling ToObject on it. |
| 443 | const int argc = this->target()->arguments_count(); |
| 444 | StackFrameLocator locator; |
| 445 | JavaScriptFrame* frame = locator.FindJavaScriptFrame(0); |
| 446 | int index = frame->ComputeExpressionsCount() - (argc + 1); |
| 447 | frame->SetExpression(index, *Factory::ToObject(object)); |
| 448 | } |
| 449 | |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 450 | |
John Reck | 5913587 | 2010-11-02 12:39:01 -0700 | [diff] [blame] | 451 | MaybeObject* CallICBase::LoadFunction(State state, |
Ben Murdoch | b8e0da2 | 2011-05-16 14:20:40 +0100 | [diff] [blame] | 452 | Code::ExtraICState extra_ic_state, |
John Reck | 5913587 | 2010-11-02 12:39:01 -0700 | [diff] [blame] | 453 | Handle<Object> object, |
| 454 | Handle<String> name) { |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 455 | // If the object is undefined or null it's illegal to try to get any |
| 456 | // of its properties; throw a TypeError in that case. |
| 457 | if (object->IsUndefined() || object->IsNull()) { |
| 458 | return TypeError("non_object_property_call", object, name); |
| 459 | } |
| 460 | |
Leon Clarke | e46be81 | 2010-01-19 14:06:41 +0000 | [diff] [blame] | 461 | if (object->IsString() || object->IsNumber() || object->IsBoolean()) { |
| 462 | ReceiverToObject(object); |
| 463 | } |
| 464 | |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 465 | // Check if the name is trivially convertible to an index and get |
| 466 | // the element if so. |
| 467 | uint32_t index; |
| 468 | if (name->AsArrayIndex(&index)) { |
John Reck | 5913587 | 2010-11-02 12:39:01 -0700 | [diff] [blame] | 469 | Object* result; |
| 470 | { MaybeObject* maybe_result = object->GetElement(index); |
| 471 | if (!maybe_result->ToObject(&result)) return maybe_result; |
| 472 | } |
| 473 | |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 474 | if (result->IsJSFunction()) return result; |
| 475 | |
| 476 | // Try to find a suitable function delegate for the object at hand. |
| 477 | result = TryCallAsFunction(result); |
| 478 | if (result->IsJSFunction()) return result; |
| 479 | |
| 480 | // Otherwise, it will fail in the lookup step. |
| 481 | } |
| 482 | |
| 483 | // Lookup the property in the object. |
| 484 | LookupResult lookup; |
| 485 | LookupForRead(*object, *name, &lookup); |
| 486 | |
Andrei Popescu | 402d937 | 2010-02-26 13:31:12 +0000 | [diff] [blame] | 487 | if (!lookup.IsProperty()) { |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 488 | // If the object does not have the requested property, check which |
| 489 | // exception we need to throw. |
Leon Clarke | e46be81 | 2010-01-19 14:06:41 +0000 | [diff] [blame] | 490 | if (IsContextual(object)) { |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 491 | return ReferenceError("not_defined", name); |
| 492 | } |
| 493 | return TypeError("undefined_method", object, name); |
| 494 | } |
| 495 | |
| 496 | // Lookup is valid: Update inline cache and stub cache. |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 497 | if (FLAG_use_ic) { |
Ben Murdoch | b8e0da2 | 2011-05-16 14:20:40 +0100 | [diff] [blame] | 498 | UpdateCaches(&lookup, state, extra_ic_state, object, name); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 499 | } |
| 500 | |
| 501 | // Get the property. |
| 502 | PropertyAttributes attr; |
John Reck | 5913587 | 2010-11-02 12:39:01 -0700 | [diff] [blame] | 503 | Object* result; |
| 504 | { MaybeObject* maybe_result = |
| 505 | object->GetProperty(*object, &lookup, *name, &attr); |
| 506 | if (!maybe_result->ToObject(&result)) return maybe_result; |
| 507 | } |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 508 | if (lookup.type() == INTERCEPTOR) { |
| 509 | // If the object does not have the requested property, check which |
| 510 | // exception we need to throw. |
| 511 | if (attr == ABSENT) { |
Leon Clarke | e46be81 | 2010-01-19 14:06:41 +0000 | [diff] [blame] | 512 | if (IsContextual(object)) { |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 513 | return ReferenceError("not_defined", name); |
| 514 | } |
| 515 | return TypeError("undefined_method", object, name); |
| 516 | } |
| 517 | } |
| 518 | |
| 519 | ASSERT(result != Heap::the_hole_value()); |
| 520 | |
| 521 | if (result->IsJSFunction()) { |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 522 | #ifdef ENABLE_DEBUGGER_SUPPORT |
| 523 | // Handle stepping into a function if step into is active. |
| 524 | if (Debug::StepInActive()) { |
| 525 | // Protect the result in a handle as the debugger can allocate and might |
| 526 | // cause GC. |
| 527 | HandleScope scope; |
| 528 | Handle<JSFunction> function(JSFunction::cast(result)); |
| 529 | Debug::HandleStepIn(function, object, fp(), false); |
| 530 | return *function; |
| 531 | } |
| 532 | #endif |
| 533 | |
| 534 | return result; |
| 535 | } |
| 536 | |
| 537 | // Try to find a suitable function delegate for the object at hand. |
| 538 | result = TryCallAsFunction(result); |
John Reck | 5913587 | 2010-11-02 12:39:01 -0700 | [diff] [blame] | 539 | MaybeObject* answer = result; |
| 540 | if (!result->IsJSFunction()) { |
| 541 | answer = TypeError("property_not_function", object, name); |
| 542 | } |
| 543 | return answer; |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 544 | } |
| 545 | |
| 546 | |
Ben Murdoch | b8e0da2 | 2011-05-16 14:20:40 +0100 | [diff] [blame] | 547 | bool CallICBase::TryUpdateExtraICState(LookupResult* lookup, |
| 548 | Handle<Object> object, |
| 549 | Code::ExtraICState* extra_ic_state) { |
| 550 | ASSERT(kind_ == Code::CALL_IC); |
| 551 | if (lookup->type() != CONSTANT_FUNCTION) return false; |
| 552 | JSFunction* function = lookup->GetConstantFunction(); |
| 553 | if (!function->shared()->HasBuiltinFunctionId()) return false; |
| 554 | |
| 555 | // Fetch the arguments passed to the called function. |
| 556 | const int argc = target()->arguments_count(); |
| 557 | Address entry = Top::c_entry_fp(Top::GetCurrentThread()); |
| 558 | Address fp = Memory::Address_at(entry + ExitFrameConstants::kCallerFPOffset); |
| 559 | Arguments args(argc + 1, |
| 560 | &Memory::Object_at(fp + |
| 561 | StandardFrameConstants::kCallerSPOffset + |
| 562 | argc * kPointerSize)); |
| 563 | switch (function->shared()->builtin_function_id()) { |
| 564 | case kStringCharCodeAt: |
| 565 | case kStringCharAt: |
| 566 | if (object->IsString()) { |
| 567 | String* string = String::cast(*object); |
| 568 | // Check that there's the right wrapper in the receiver slot. |
| 569 | ASSERT(string == JSValue::cast(args[0])->value()); |
| 570 | // If we're in the default (fastest) state and the index is |
| 571 | // out of bounds, update the state to record this fact. |
| 572 | if (*extra_ic_state == DEFAULT_STRING_STUB && |
| 573 | argc >= 1 && args[1]->IsNumber()) { |
| 574 | double index; |
| 575 | if (args[1]->IsSmi()) { |
| 576 | index = Smi::cast(args[1])->value(); |
| 577 | } else { |
| 578 | ASSERT(args[1]->IsHeapNumber()); |
| 579 | index = DoubleToInteger(HeapNumber::cast(args[1])->value()); |
| 580 | } |
| 581 | if (index < 0 || index >= string->length()) { |
| 582 | *extra_ic_state = STRING_INDEX_OUT_OF_BOUNDS; |
| 583 | return true; |
| 584 | } |
| 585 | } |
| 586 | } |
| 587 | break; |
| 588 | default: |
| 589 | return false; |
| 590 | } |
| 591 | return false; |
| 592 | } |
| 593 | |
| 594 | |
| 595 | MaybeObject* CallICBase::ComputeMonomorphicStub( |
| 596 | LookupResult* lookup, |
| 597 | State state, |
| 598 | Code::ExtraICState extra_ic_state, |
| 599 | Handle<Object> object, |
| 600 | Handle<String> name) { |
| 601 | int argc = target()->arguments_count(); |
| 602 | InLoopFlag in_loop = target()->ic_in_loop(); |
| 603 | MaybeObject* maybe_code = NULL; |
| 604 | switch (lookup->type()) { |
| 605 | case FIELD: { |
| 606 | int index = lookup->GetFieldIndex(); |
| 607 | maybe_code = StubCache::ComputeCallField(argc, |
| 608 | in_loop, |
| 609 | kind_, |
| 610 | *name, |
| 611 | *object, |
| 612 | lookup->holder(), |
| 613 | index); |
| 614 | break; |
| 615 | } |
| 616 | case CONSTANT_FUNCTION: { |
| 617 | // Get the constant function and compute the code stub for this |
| 618 | // call; used for rewriting to monomorphic state and making sure |
| 619 | // that the code stub is in the stub cache. |
| 620 | JSFunction* function = lookup->GetConstantFunction(); |
| 621 | maybe_code = StubCache::ComputeCallConstant(argc, |
| 622 | in_loop, |
| 623 | kind_, |
| 624 | extra_ic_state, |
| 625 | *name, |
| 626 | *object, |
| 627 | lookup->holder(), |
| 628 | function); |
| 629 | break; |
| 630 | } |
| 631 | case NORMAL: { |
| 632 | if (!object->IsJSObject()) return NULL; |
| 633 | Handle<JSObject> receiver = Handle<JSObject>::cast(object); |
| 634 | |
| 635 | if (lookup->holder()->IsGlobalObject()) { |
| 636 | GlobalObject* global = GlobalObject::cast(lookup->holder()); |
| 637 | JSGlobalPropertyCell* cell = |
| 638 | JSGlobalPropertyCell::cast(global->GetPropertyCell(lookup)); |
| 639 | if (!cell->value()->IsJSFunction()) return NULL; |
| 640 | JSFunction* function = JSFunction::cast(cell->value()); |
| 641 | maybe_code = StubCache::ComputeCallGlobal(argc, |
| 642 | in_loop, |
| 643 | kind_, |
| 644 | *name, |
| 645 | *receiver, |
| 646 | global, |
| 647 | cell, |
| 648 | function); |
| 649 | } else { |
| 650 | // There is only one shared stub for calling normalized |
| 651 | // properties. It does not traverse the prototype chain, so the |
| 652 | // property must be found in the receiver for the stub to be |
| 653 | // applicable. |
| 654 | if (lookup->holder() != *receiver) return NULL; |
| 655 | maybe_code = StubCache::ComputeCallNormal(argc, |
| 656 | in_loop, |
| 657 | kind_, |
| 658 | *name, |
| 659 | *receiver); |
| 660 | } |
| 661 | break; |
| 662 | } |
| 663 | case INTERCEPTOR: { |
| 664 | ASSERT(HasInterceptorGetter(lookup->holder())); |
| 665 | maybe_code = StubCache::ComputeCallInterceptor(argc, |
| 666 | kind_, |
| 667 | *name, |
| 668 | *object, |
| 669 | lookup->holder()); |
| 670 | break; |
| 671 | } |
| 672 | default: |
| 673 | maybe_code = NULL; |
| 674 | break; |
| 675 | } |
| 676 | return maybe_code; |
| 677 | } |
| 678 | |
| 679 | |
Ben Murdoch | 7f4d5bd | 2010-06-15 11:15:29 +0100 | [diff] [blame] | 680 | void CallICBase::UpdateCaches(LookupResult* lookup, |
Steve Block | 8defd9f | 2010-07-08 12:39:36 +0100 | [diff] [blame] | 681 | State state, |
Ben Murdoch | b8e0da2 | 2011-05-16 14:20:40 +0100 | [diff] [blame] | 682 | Code::ExtraICState extra_ic_state, |
Steve Block | 8defd9f | 2010-07-08 12:39:36 +0100 | [diff] [blame] | 683 | Handle<Object> object, |
| 684 | Handle<String> name) { |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 685 | // Bail out if we didn't find a result. |
Andrei Popescu | 402d937 | 2010-02-26 13:31:12 +0000 | [diff] [blame] | 686 | if (!lookup->IsProperty() || !lookup->IsCacheable()) return; |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 687 | |
Steve Block | 8defd9f | 2010-07-08 12:39:36 +0100 | [diff] [blame] | 688 | if (lookup->holder() != *object && |
| 689 | HasNormalObjectsInPrototypeChain(lookup, object->GetPrototype())) { |
| 690 | // Suppress optimization for prototype chains with slow properties objects |
| 691 | // in the middle. |
| 692 | return; |
| 693 | } |
Steve Block | 8defd9f | 2010-07-08 12:39:36 +0100 | [diff] [blame] | 694 | |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 695 | // Compute the number of arguments. |
| 696 | int argc = target()->arguments_count(); |
| 697 | InLoopFlag in_loop = target()->ic_in_loop(); |
John Reck | 5913587 | 2010-11-02 12:39:01 -0700 | [diff] [blame] | 698 | MaybeObject* maybe_code = NULL; |
Ben Murdoch | b8e0da2 | 2011-05-16 14:20:40 +0100 | [diff] [blame] | 699 | bool had_proto_failure = false; |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 700 | if (state == UNINITIALIZED) { |
| 701 | // This is the first time we execute this inline cache. |
| 702 | // Set the target to the pre monomorphic stub to delay |
| 703 | // setting the monomorphic state. |
John Reck | 5913587 | 2010-11-02 12:39:01 -0700 | [diff] [blame] | 704 | maybe_code = StubCache::ComputeCallPreMonomorphic(argc, in_loop, kind_); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 705 | } else if (state == MONOMORPHIC) { |
Ben Murdoch | b8e0da2 | 2011-05-16 14:20:40 +0100 | [diff] [blame] | 706 | if (kind_ == Code::CALL_IC && |
| 707 | TryUpdateExtraICState(lookup, object, &extra_ic_state)) { |
| 708 | maybe_code = ComputeMonomorphicStub(lookup, |
| 709 | state, |
| 710 | extra_ic_state, |
| 711 | object, |
| 712 | name); |
| 713 | } else if (kind_ == Code::CALL_IC && |
| 714 | TryRemoveInvalidPrototypeDependentStub(target(), |
| 715 | *object, |
| 716 | *name)) { |
| 717 | had_proto_failure = true; |
| 718 | maybe_code = ComputeMonomorphicStub(lookup, |
| 719 | state, |
| 720 | extra_ic_state, |
| 721 | object, |
| 722 | name); |
| 723 | } else { |
| 724 | maybe_code = StubCache::ComputeCallMegamorphic(argc, in_loop, kind_); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 725 | } |
Ben Murdoch | b8e0da2 | 2011-05-16 14:20:40 +0100 | [diff] [blame] | 726 | } else { |
| 727 | maybe_code = ComputeMonomorphicStub(lookup, |
| 728 | state, |
| 729 | extra_ic_state, |
| 730 | object, |
| 731 | name); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 732 | } |
| 733 | |
| 734 | // If we're unable to compute the stub (not enough memory left), we |
| 735 | // simply avoid updating the caches. |
Ben Murdoch | b8e0da2 | 2011-05-16 14:20:40 +0100 | [diff] [blame] | 736 | Object* code; |
John Reck | 5913587 | 2010-11-02 12:39:01 -0700 | [diff] [blame] | 737 | if (maybe_code == NULL || !maybe_code->ToObject(&code)) return; |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 738 | |
| 739 | // Patch the call site depending on the state of the cache. |
| 740 | if (state == UNINITIALIZED || |
| 741 | state == PREMONOMORPHIC || |
| 742 | state == MONOMORPHIC || |
| 743 | state == MONOMORPHIC_PROTOTYPE_FAILURE) { |
| 744 | set_target(Code::cast(code)); |
Kristian Monsen | 9dcf7e2 | 2010-06-28 14:14:28 +0100 | [diff] [blame] | 745 | } else if (state == MEGAMORPHIC) { |
Steve Block | 8defd9f | 2010-07-08 12:39:36 +0100 | [diff] [blame] | 746 | // Cache code holding map should be consistent with |
| 747 | // GenerateMonomorphicCacheProbe. It is not the map which holds the stub. |
| 748 | Map* map = JSObject::cast(object->IsJSObject() ? *object : |
| 749 | object->GetPrototype())->map(); |
| 750 | |
Kristian Monsen | 9dcf7e2 | 2010-06-28 14:14:28 +0100 | [diff] [blame] | 751 | // Update the stub cache. |
Steve Block | 8defd9f | 2010-07-08 12:39:36 +0100 | [diff] [blame] | 752 | StubCache::Set(*name, map, Code::cast(code)); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 753 | } |
| 754 | |
Ben Murdoch | b8e0da2 | 2011-05-16 14:20:40 +0100 | [diff] [blame] | 755 | USE(had_proto_failure); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 756 | #ifdef DEBUG |
Ben Murdoch | b8e0da2 | 2011-05-16 14:20:40 +0100 | [diff] [blame] | 757 | if (had_proto_failure) state = MONOMORPHIC_PROTOTYPE_FAILURE; |
Ben Murdoch | 7f4d5bd | 2010-06-15 11:15:29 +0100 | [diff] [blame] | 758 | TraceIC(kind_ == Code::CALL_IC ? "CallIC" : "KeyedCallIC", |
| 759 | name, state, target(), in_loop ? " (in-loop)" : ""); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 760 | #endif |
| 761 | } |
| 762 | |
| 763 | |
John Reck | 5913587 | 2010-11-02 12:39:01 -0700 | [diff] [blame] | 764 | MaybeObject* KeyedCallIC::LoadFunction(State state, |
| 765 | Handle<Object> object, |
| 766 | Handle<Object> key) { |
Ben Murdoch | 7f4d5bd | 2010-06-15 11:15:29 +0100 | [diff] [blame] | 767 | if (key->IsSymbol()) { |
Ben Murdoch | b8e0da2 | 2011-05-16 14:20:40 +0100 | [diff] [blame] | 768 | return CallICBase::LoadFunction(state, |
| 769 | Code::kNoExtraICState, |
| 770 | object, |
| 771 | Handle<String>::cast(key)); |
Ben Murdoch | 7f4d5bd | 2010-06-15 11:15:29 +0100 | [diff] [blame] | 772 | } |
| 773 | |
| 774 | if (object->IsUndefined() || object->IsNull()) { |
| 775 | return TypeError("non_object_property_call", object, key); |
| 776 | } |
| 777 | |
| 778 | if (object->IsString() || object->IsNumber() || object->IsBoolean()) { |
| 779 | ReceiverToObject(object); |
| 780 | } |
| 781 | |
| 782 | if (FLAG_use_ic && state != MEGAMORPHIC && !object->IsAccessCheckNeeded()) { |
| 783 | int argc = target()->arguments_count(); |
| 784 | InLoopFlag in_loop = target()->ic_in_loop(); |
John Reck | 5913587 | 2010-11-02 12:39:01 -0700 | [diff] [blame] | 785 | MaybeObject* maybe_code = StubCache::ComputeCallMegamorphic( |
Ben Murdoch | 7f4d5bd | 2010-06-15 11:15:29 +0100 | [diff] [blame] | 786 | argc, in_loop, Code::KEYED_CALL_IC); |
John Reck | 5913587 | 2010-11-02 12:39:01 -0700 | [diff] [blame] | 787 | Object* code; |
| 788 | if (maybe_code->ToObject(&code)) { |
Ben Murdoch | 7f4d5bd | 2010-06-15 11:15:29 +0100 | [diff] [blame] | 789 | set_target(Code::cast(code)); |
| 790 | #ifdef DEBUG |
| 791 | TraceIC( |
| 792 | "KeyedCallIC", key, state, target(), in_loop ? " (in-loop)" : ""); |
| 793 | #endif |
| 794 | } |
| 795 | } |
John Reck | 5913587 | 2010-11-02 12:39:01 -0700 | [diff] [blame] | 796 | Object* result; |
| 797 | { MaybeObject* maybe_result = Runtime::GetObjectProperty(object, key); |
| 798 | if (!maybe_result->ToObject(&result)) return maybe_result; |
| 799 | } |
Ben Murdoch | 7f4d5bd | 2010-06-15 11:15:29 +0100 | [diff] [blame] | 800 | if (result->IsJSFunction()) return result; |
| 801 | result = TryCallAsFunction(result); |
John Reck | 5913587 | 2010-11-02 12:39:01 -0700 | [diff] [blame] | 802 | MaybeObject* answer = result; |
| 803 | if (!result->IsJSFunction()) { |
| 804 | answer = TypeError("property_not_function", object, key); |
| 805 | } |
| 806 | return answer; |
Ben Murdoch | 7f4d5bd | 2010-06-15 11:15:29 +0100 | [diff] [blame] | 807 | } |
| 808 | |
| 809 | |
Kristian Monsen | 0d5e116 | 2010-09-30 15:31:59 +0100 | [diff] [blame] | 810 | #ifdef DEBUG |
| 811 | #define TRACE_IC_NAMED(msg, name) \ |
| 812 | if (FLAG_trace_ic) PrintF(msg, *(name)->ToCString()) |
| 813 | #else |
| 814 | #define TRACE_IC_NAMED(msg, name) |
| 815 | #endif |
| 816 | |
| 817 | |
John Reck | 5913587 | 2010-11-02 12:39:01 -0700 | [diff] [blame] | 818 | MaybeObject* LoadIC::Load(State state, |
| 819 | Handle<Object> object, |
| 820 | Handle<String> name) { |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 821 | // If the object is undefined or null it's illegal to try to get any |
| 822 | // of its properties; throw a TypeError in that case. |
| 823 | if (object->IsUndefined() || object->IsNull()) { |
| 824 | return TypeError("non_object_property_load", object, name); |
| 825 | } |
| 826 | |
| 827 | if (FLAG_use_ic) { |
Steve Block | 1e0659c | 2011-05-24 12:43:12 +0100 | [diff] [blame^] | 828 | Code* non_monomorphic_stub = |
| 829 | (state == UNINITIALIZED) ? pre_monomorphic_stub() : megamorphic_stub(); |
| 830 | |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 831 | // Use specialized code for getting the length of strings and |
| 832 | // string wrapper objects. The length property of string wrapper |
| 833 | // objects is read-only and therefore always returns the length of |
| 834 | // the underlying string value. See ECMA-262 15.5.5.1. |
| 835 | if ((object->IsString() || object->IsStringWrapper()) && |
| 836 | name->Equals(Heap::length_symbol())) { |
| 837 | HandleScope scope; |
Steve Block | 1e0659c | 2011-05-24 12:43:12 +0100 | [diff] [blame^] | 838 | #ifdef DEBUG |
| 839 | if (FLAG_trace_ic) PrintF("[LoadIC : +#length /string]\n"); |
| 840 | #endif |
| 841 | if (state == PREMONOMORPHIC) { |
| 842 | if (object->IsString()) { |
| 843 | Map* map = HeapObject::cast(*object)->map(); |
| 844 | const int offset = String::kLengthOffset; |
| 845 | PatchInlinedLoad(address(), map, offset); |
| 846 | set_target(Builtins::builtin(Builtins::LoadIC_StringLength)); |
| 847 | } else { |
| 848 | set_target(Builtins::builtin(Builtins::LoadIC_StringWrapperLength)); |
| 849 | } |
| 850 | } else if (state == MONOMORPHIC && object->IsStringWrapper()) { |
| 851 | set_target(Builtins::builtin(Builtins::LoadIC_StringWrapperLength)); |
| 852 | } else { |
| 853 | set_target(non_monomorphic_stub); |
| 854 | } |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 855 | // Get the string if we have a string wrapper object. |
| 856 | if (object->IsJSValue()) { |
| 857 | object = Handle<Object>(Handle<JSValue>::cast(object)->value()); |
| 858 | } |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 859 | return Smi::FromInt(String::cast(*object)->length()); |
| 860 | } |
| 861 | |
| 862 | // Use specialized code for getting the length of arrays. |
| 863 | if (object->IsJSArray() && name->Equals(Heap::length_symbol())) { |
| 864 | #ifdef DEBUG |
| 865 | if (FLAG_trace_ic) PrintF("[LoadIC : +#length /array]\n"); |
| 866 | #endif |
Steve Block | 1e0659c | 2011-05-24 12:43:12 +0100 | [diff] [blame^] | 867 | if (state == PREMONOMORPHIC) { |
| 868 | Map* map = HeapObject::cast(*object)->map(); |
| 869 | const int offset = JSArray::kLengthOffset; |
| 870 | PatchInlinedLoad(address(), map, offset); |
| 871 | set_target(Builtins::builtin(Builtins::LoadIC_ArrayLength)); |
| 872 | } else { |
| 873 | set_target(non_monomorphic_stub); |
| 874 | } |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 875 | return JSArray::cast(*object)->length(); |
| 876 | } |
| 877 | |
| 878 | // Use specialized code for getting prototype of functions. |
Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [diff] [blame] | 879 | if (object->IsJSFunction() && name->Equals(Heap::prototype_symbol()) && |
| 880 | JSFunction::cast(*object)->should_have_prototype()) { |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 881 | #ifdef DEBUG |
| 882 | if (FLAG_trace_ic) PrintF("[LoadIC : +#prototype /function]\n"); |
| 883 | #endif |
Steve Block | 1e0659c | 2011-05-24 12:43:12 +0100 | [diff] [blame^] | 884 | if (state == PREMONOMORPHIC) { |
| 885 | set_target(Builtins::builtin(Builtins::LoadIC_FunctionPrototype)); |
| 886 | } else { |
| 887 | set_target(non_monomorphic_stub); |
| 888 | } |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 889 | return Accessors::FunctionGetPrototype(*object, 0); |
| 890 | } |
| 891 | } |
| 892 | |
| 893 | // Check if the name is trivially convertible to an index and get |
| 894 | // the element if so. |
| 895 | uint32_t index; |
| 896 | if (name->AsArrayIndex(&index)) return object->GetElement(index); |
| 897 | |
| 898 | // Named lookup in the object. |
| 899 | LookupResult lookup; |
| 900 | LookupForRead(*object, *name, &lookup); |
| 901 | |
Andrei Popescu | 402d937 | 2010-02-26 13:31:12 +0000 | [diff] [blame] | 902 | // If we did not find a property, check if we need to throw an exception. |
| 903 | if (!lookup.IsProperty()) { |
Leon Clarke | e46be81 | 2010-01-19 14:06:41 +0000 | [diff] [blame] | 904 | if (FLAG_strict || IsContextual(object)) { |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 905 | return ReferenceError("not_defined", name); |
| 906 | } |
| 907 | LOG(SuspectReadEvent(*name, *object)); |
| 908 | } |
| 909 | |
Kristian Monsen | 0d5e116 | 2010-09-30 15:31:59 +0100 | [diff] [blame] | 910 | bool can_be_inlined_precheck = |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 911 | FLAG_use_ic && |
Andrei Popescu | 402d937 | 2010-02-26 13:31:12 +0000 | [diff] [blame] | 912 | lookup.IsProperty() && |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 913 | lookup.IsCacheable() && |
| 914 | lookup.holder() == *object && |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 915 | !object->IsAccessCheckNeeded(); |
| 916 | |
Kristian Monsen | 0d5e116 | 2010-09-30 15:31:59 +0100 | [diff] [blame] | 917 | bool can_be_inlined = |
| 918 | can_be_inlined_precheck && |
| 919 | state == PREMONOMORPHIC && |
| 920 | lookup.type() == FIELD; |
| 921 | |
| 922 | bool can_be_inlined_contextual = |
| 923 | can_be_inlined_precheck && |
| 924 | state == UNINITIALIZED && |
| 925 | lookup.holder()->IsGlobalObject() && |
| 926 | lookup.type() == NORMAL; |
| 927 | |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 928 | if (can_be_inlined) { |
| 929 | Map* map = lookup.holder()->map(); |
| 930 | // Property's index in the properties array. If negative we have |
| 931 | // an inobject property. |
| 932 | int index = lookup.GetFieldIndex() - map->inobject_properties(); |
| 933 | if (index < 0) { |
| 934 | // Index is an offset from the end of the object. |
| 935 | int offset = map->instance_size() + (index * kPointerSize); |
| 936 | if (PatchInlinedLoad(address(), map, offset)) { |
| 937 | set_target(megamorphic_stub()); |
Kristian Monsen | 0d5e116 | 2010-09-30 15:31:59 +0100 | [diff] [blame] | 938 | TRACE_IC_NAMED("[LoadIC : inline patch %s]\n", name); |
Kristian Monsen | 50ef84f | 2010-07-29 15:18:00 +0100 | [diff] [blame] | 939 | return lookup.holder()->FastPropertyAt(lookup.GetFieldIndex()); |
Kristian Monsen | 9dcf7e2 | 2010-06-28 14:14:28 +0100 | [diff] [blame] | 940 | } else { |
Kristian Monsen | 0d5e116 | 2010-09-30 15:31:59 +0100 | [diff] [blame] | 941 | TRACE_IC_NAMED("[LoadIC : no inline patch %s (patching failed)]\n", |
| 942 | name); |
Kristian Monsen | 9dcf7e2 | 2010-06-28 14:14:28 +0100 | [diff] [blame] | 943 | } |
| 944 | } else { |
Kristian Monsen | 0d5e116 | 2010-09-30 15:31:59 +0100 | [diff] [blame] | 945 | TRACE_IC_NAMED("[LoadIC : no inline patch %s (not inobject)]\n", name); |
| 946 | } |
| 947 | } else if (can_be_inlined_contextual) { |
| 948 | Map* map = lookup.holder()->map(); |
| 949 | JSGlobalPropertyCell* cell = JSGlobalPropertyCell::cast( |
| 950 | lookup.holder()->property_dictionary()->ValueAt( |
| 951 | lookup.GetDictionaryEntry())); |
Ben Murdoch | f87a203 | 2010-10-22 12:50:53 +0100 | [diff] [blame] | 952 | if (PatchInlinedContextualLoad(address(), |
| 953 | map, |
| 954 | cell, |
| 955 | lookup.IsDontDelete())) { |
Kristian Monsen | 0d5e116 | 2010-09-30 15:31:59 +0100 | [diff] [blame] | 956 | set_target(megamorphic_stub()); |
| 957 | TRACE_IC_NAMED("[LoadIC : inline contextual patch %s]\n", name); |
| 958 | ASSERT(cell->value() != Heap::the_hole_value()); |
| 959 | return cell->value(); |
Kristian Monsen | 9dcf7e2 | 2010-06-28 14:14:28 +0100 | [diff] [blame] | 960 | } |
| 961 | } else { |
| 962 | if (FLAG_use_ic && state == PREMONOMORPHIC) { |
Kristian Monsen | 0d5e116 | 2010-09-30 15:31:59 +0100 | [diff] [blame] | 963 | TRACE_IC_NAMED("[LoadIC : no inline patch %s (not inlinable)]\n", name); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 964 | } |
| 965 | } |
| 966 | |
| 967 | // Update inline cache and stub cache. |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 968 | if (FLAG_use_ic) { |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 969 | UpdateCaches(&lookup, state, object, name); |
| 970 | } |
| 971 | |
| 972 | PropertyAttributes attr; |
Andrei Popescu | 402d937 | 2010-02-26 13:31:12 +0000 | [diff] [blame] | 973 | if (lookup.IsProperty() && lookup.type() == INTERCEPTOR) { |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 974 | // Get the property. |
John Reck | 5913587 | 2010-11-02 12:39:01 -0700 | [diff] [blame] | 975 | Object* result; |
| 976 | { MaybeObject* maybe_result = |
| 977 | object->GetProperty(*object, &lookup, *name, &attr); |
| 978 | if (!maybe_result->ToObject(&result)) return maybe_result; |
| 979 | } |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 980 | // If the property is not present, check if we need to throw an |
| 981 | // exception. |
Leon Clarke | e46be81 | 2010-01-19 14:06:41 +0000 | [diff] [blame] | 982 | if (attr == ABSENT && IsContextual(object)) { |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 983 | return ReferenceError("not_defined", name); |
| 984 | } |
| 985 | return result; |
| 986 | } |
| 987 | |
| 988 | // Get the property. |
| 989 | return object->GetProperty(*object, &lookup, *name, &attr); |
| 990 | } |
| 991 | |
| 992 | |
| 993 | void LoadIC::UpdateCaches(LookupResult* lookup, |
| 994 | State state, |
| 995 | Handle<Object> object, |
| 996 | Handle<String> name) { |
Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [diff] [blame] | 997 | // Bail out if the result is not cacheable. |
| 998 | if (!lookup->IsCacheable()) return; |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 999 | |
| 1000 | // Loading properties from values is not common, so don't try to |
| 1001 | // deal with non-JS objects here. |
| 1002 | if (!object->IsJSObject()) return; |
| 1003 | Handle<JSObject> receiver = Handle<JSObject>::cast(object); |
| 1004 | |
Steve Block | 8defd9f | 2010-07-08 12:39:36 +0100 | [diff] [blame] | 1005 | if (HasNormalObjectsInPrototypeChain(lookup, *object)) return; |
| 1006 | |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1007 | // Compute the code stub for this load. |
John Reck | 5913587 | 2010-11-02 12:39:01 -0700 | [diff] [blame] | 1008 | MaybeObject* maybe_code = NULL; |
| 1009 | Object* code; |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1010 | if (state == UNINITIALIZED) { |
| 1011 | // This is the first time we execute this inline cache. |
| 1012 | // Set the target to the pre monomorphic stub to delay |
| 1013 | // setting the monomorphic state. |
John Reck | 5913587 | 2010-11-02 12:39:01 -0700 | [diff] [blame] | 1014 | maybe_code = pre_monomorphic_stub(); |
Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [diff] [blame] | 1015 | } else if (!lookup->IsProperty()) { |
| 1016 | // Nonexistent property. The result is undefined. |
John Reck | 5913587 | 2010-11-02 12:39:01 -0700 | [diff] [blame] | 1017 | maybe_code = StubCache::ComputeLoadNonexistent(*name, *receiver); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1018 | } else { |
| 1019 | // Compute monomorphic stub. |
| 1020 | switch (lookup->type()) { |
| 1021 | case FIELD: { |
John Reck | 5913587 | 2010-11-02 12:39:01 -0700 | [diff] [blame] | 1022 | maybe_code = StubCache::ComputeLoadField(*name, *receiver, |
| 1023 | lookup->holder(), |
| 1024 | lookup->GetFieldIndex()); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1025 | break; |
| 1026 | } |
| 1027 | case CONSTANT_FUNCTION: { |
| 1028 | Object* constant = lookup->GetConstantFunction(); |
John Reck | 5913587 | 2010-11-02 12:39:01 -0700 | [diff] [blame] | 1029 | maybe_code = StubCache::ComputeLoadConstant(*name, *receiver, |
| 1030 | lookup->holder(), constant); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1031 | break; |
| 1032 | } |
| 1033 | case NORMAL: { |
| 1034 | if (lookup->holder()->IsGlobalObject()) { |
| 1035 | GlobalObject* global = GlobalObject::cast(lookup->holder()); |
| 1036 | JSGlobalPropertyCell* cell = |
| 1037 | JSGlobalPropertyCell::cast(global->GetPropertyCell(lookup)); |
John Reck | 5913587 | 2010-11-02 12:39:01 -0700 | [diff] [blame] | 1038 | maybe_code = StubCache::ComputeLoadGlobal(*name, |
| 1039 | *receiver, |
| 1040 | global, |
| 1041 | cell, |
| 1042 | lookup->IsDontDelete()); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1043 | } else { |
| 1044 | // There is only one shared stub for loading normalized |
| 1045 | // properties. It does not traverse the prototype chain, so the |
| 1046 | // property must be found in the receiver for the stub to be |
| 1047 | // applicable. |
| 1048 | if (lookup->holder() != *receiver) return; |
John Reck | 5913587 | 2010-11-02 12:39:01 -0700 | [diff] [blame] | 1049 | maybe_code = StubCache::ComputeLoadNormal(); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1050 | } |
| 1051 | break; |
| 1052 | } |
| 1053 | case CALLBACKS: { |
| 1054 | if (!lookup->GetCallbackObject()->IsAccessorInfo()) return; |
| 1055 | AccessorInfo* callback = |
| 1056 | AccessorInfo::cast(lookup->GetCallbackObject()); |
| 1057 | if (v8::ToCData<Address>(callback->getter()) == 0) return; |
John Reck | 5913587 | 2010-11-02 12:39:01 -0700 | [diff] [blame] | 1058 | maybe_code = StubCache::ComputeLoadCallback(*name, *receiver, |
| 1059 | lookup->holder(), callback); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1060 | break; |
| 1061 | } |
| 1062 | case INTERCEPTOR: { |
| 1063 | ASSERT(HasInterceptorGetter(lookup->holder())); |
John Reck | 5913587 | 2010-11-02 12:39:01 -0700 | [diff] [blame] | 1064 | maybe_code = StubCache::ComputeLoadInterceptor(*name, *receiver, |
| 1065 | lookup->holder()); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1066 | break; |
| 1067 | } |
| 1068 | default: |
| 1069 | return; |
| 1070 | } |
| 1071 | } |
| 1072 | |
| 1073 | // If we're unable to compute the stub (not enough memory left), we |
| 1074 | // simply avoid updating the caches. |
John Reck | 5913587 | 2010-11-02 12:39:01 -0700 | [diff] [blame] | 1075 | if (maybe_code == NULL || !maybe_code->ToObject(&code)) return; |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1076 | |
| 1077 | // Patch the call site depending on the state of the cache. |
| 1078 | if (state == UNINITIALIZED || state == PREMONOMORPHIC || |
| 1079 | state == MONOMORPHIC_PROTOTYPE_FAILURE) { |
| 1080 | set_target(Code::cast(code)); |
| 1081 | } else if (state == MONOMORPHIC) { |
| 1082 | set_target(megamorphic_stub()); |
Kristian Monsen | 9dcf7e2 | 2010-06-28 14:14:28 +0100 | [diff] [blame] | 1083 | } else if (state == MEGAMORPHIC) { |
Steve Block | 8defd9f | 2010-07-08 12:39:36 +0100 | [diff] [blame] | 1084 | // Cache code holding map should be consistent with |
| 1085 | // GenerateMonomorphicCacheProbe. |
| 1086 | Map* map = JSObject::cast(object->IsJSObject() ? *object : |
| 1087 | object->GetPrototype())->map(); |
| 1088 | |
| 1089 | StubCache::Set(*name, map, Code::cast(code)); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1090 | } |
| 1091 | |
| 1092 | #ifdef DEBUG |
| 1093 | TraceIC("LoadIC", name, state, target()); |
| 1094 | #endif |
| 1095 | } |
| 1096 | |
| 1097 | |
John Reck | 5913587 | 2010-11-02 12:39:01 -0700 | [diff] [blame] | 1098 | MaybeObject* KeyedLoadIC::Load(State state, |
| 1099 | Handle<Object> object, |
| 1100 | Handle<Object> key) { |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1101 | if (key->IsSymbol()) { |
| 1102 | Handle<String> name = Handle<String>::cast(key); |
| 1103 | |
| 1104 | // If the object is undefined or null it's illegal to try to get any |
| 1105 | // of its properties; throw a TypeError in that case. |
| 1106 | if (object->IsUndefined() || object->IsNull()) { |
| 1107 | return TypeError("non_object_property_load", object, name); |
| 1108 | } |
| 1109 | |
| 1110 | if (FLAG_use_ic) { |
Steve Block | 1e0659c | 2011-05-24 12:43:12 +0100 | [diff] [blame^] | 1111 | // TODO(1073): don't ignore the current stub state. |
| 1112 | |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1113 | // Use specialized code for getting the length of strings. |
| 1114 | if (object->IsString() && name->Equals(Heap::length_symbol())) { |
| 1115 | Handle<String> string = Handle<String>::cast(object); |
| 1116 | Object* code = NULL; |
John Reck | 5913587 | 2010-11-02 12:39:01 -0700 | [diff] [blame] | 1117 | { MaybeObject* maybe_code = |
| 1118 | StubCache::ComputeKeyedLoadStringLength(*name, *string); |
| 1119 | if (!maybe_code->ToObject(&code)) return maybe_code; |
| 1120 | } |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1121 | set_target(Code::cast(code)); |
| 1122 | #ifdef DEBUG |
| 1123 | TraceIC("KeyedLoadIC", name, state, target()); |
| 1124 | #endif // DEBUG |
| 1125 | return Smi::FromInt(string->length()); |
| 1126 | } |
| 1127 | |
| 1128 | // Use specialized code for getting the length of arrays. |
| 1129 | if (object->IsJSArray() && name->Equals(Heap::length_symbol())) { |
| 1130 | Handle<JSArray> array = Handle<JSArray>::cast(object); |
John Reck | 5913587 | 2010-11-02 12:39:01 -0700 | [diff] [blame] | 1131 | Object* code; |
| 1132 | { MaybeObject* maybe_code = |
| 1133 | StubCache::ComputeKeyedLoadArrayLength(*name, *array); |
| 1134 | if (!maybe_code->ToObject(&code)) return maybe_code; |
| 1135 | } |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1136 | set_target(Code::cast(code)); |
| 1137 | #ifdef DEBUG |
| 1138 | TraceIC("KeyedLoadIC", name, state, target()); |
| 1139 | #endif // DEBUG |
| 1140 | return JSArray::cast(*object)->length(); |
| 1141 | } |
| 1142 | |
| 1143 | // Use specialized code for getting prototype of functions. |
Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [diff] [blame] | 1144 | if (object->IsJSFunction() && name->Equals(Heap::prototype_symbol()) && |
| 1145 | JSFunction::cast(*object)->should_have_prototype()) { |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1146 | Handle<JSFunction> function = Handle<JSFunction>::cast(object); |
John Reck | 5913587 | 2010-11-02 12:39:01 -0700 | [diff] [blame] | 1147 | Object* code; |
| 1148 | { MaybeObject* maybe_code = |
| 1149 | StubCache::ComputeKeyedLoadFunctionPrototype(*name, *function); |
| 1150 | if (!maybe_code->ToObject(&code)) return maybe_code; |
| 1151 | } |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1152 | set_target(Code::cast(code)); |
| 1153 | #ifdef DEBUG |
| 1154 | TraceIC("KeyedLoadIC", name, state, target()); |
| 1155 | #endif // DEBUG |
| 1156 | return Accessors::FunctionGetPrototype(*object, 0); |
| 1157 | } |
| 1158 | } |
| 1159 | |
| 1160 | // Check if the name is trivially convertible to an index and get |
| 1161 | // the element or char if so. |
| 1162 | uint32_t index = 0; |
| 1163 | if (name->AsArrayIndex(&index)) { |
| 1164 | HandleScope scope; |
| 1165 | // Rewrite to the generic keyed load stub. |
| 1166 | if (FLAG_use_ic) set_target(generic_stub()); |
| 1167 | return Runtime::GetElementOrCharAt(object, index); |
| 1168 | } |
| 1169 | |
| 1170 | // Named lookup. |
| 1171 | LookupResult lookup; |
| 1172 | LookupForRead(*object, *name, &lookup); |
| 1173 | |
Andrei Popescu | 402d937 | 2010-02-26 13:31:12 +0000 | [diff] [blame] | 1174 | // If we did not find a property, check if we need to throw an exception. |
| 1175 | if (!lookup.IsProperty()) { |
Leon Clarke | e46be81 | 2010-01-19 14:06:41 +0000 | [diff] [blame] | 1176 | if (FLAG_strict || IsContextual(object)) { |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1177 | return ReferenceError("not_defined", name); |
| 1178 | } |
| 1179 | } |
| 1180 | |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 1181 | if (FLAG_use_ic) { |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1182 | UpdateCaches(&lookup, state, object, name); |
| 1183 | } |
| 1184 | |
| 1185 | PropertyAttributes attr; |
Andrei Popescu | 402d937 | 2010-02-26 13:31:12 +0000 | [diff] [blame] | 1186 | if (lookup.IsProperty() && lookup.type() == INTERCEPTOR) { |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1187 | // Get the property. |
John Reck | 5913587 | 2010-11-02 12:39:01 -0700 | [diff] [blame] | 1188 | Object* result; |
| 1189 | { MaybeObject* maybe_result = |
| 1190 | object->GetProperty(*object, &lookup, *name, &attr); |
| 1191 | if (!maybe_result->ToObject(&result)) return maybe_result; |
| 1192 | } |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1193 | // If the property is not present, check if we need to throw an |
| 1194 | // exception. |
Leon Clarke | e46be81 | 2010-01-19 14:06:41 +0000 | [diff] [blame] | 1195 | if (attr == ABSENT && IsContextual(object)) { |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1196 | return ReferenceError("not_defined", name); |
| 1197 | } |
| 1198 | return result; |
| 1199 | } |
| 1200 | |
| 1201 | return object->GetProperty(*object, &lookup, *name, &attr); |
| 1202 | } |
| 1203 | |
| 1204 | // Do not use ICs for objects that require access checks (including |
| 1205 | // the global object). |
| 1206 | bool use_ic = FLAG_use_ic && !object->IsAccessCheckNeeded(); |
| 1207 | |
| 1208 | if (use_ic) { |
Steve Block | 3ce2e20 | 2009-11-05 08:53:23 +0000 | [diff] [blame] | 1209 | Code* stub = generic_stub(); |
Steve Block | 1e0659c | 2011-05-24 12:43:12 +0100 | [diff] [blame^] | 1210 | if (state == UNINITIALIZED) { |
| 1211 | if (object->IsString() && key->IsNumber()) { |
| 1212 | stub = string_stub(); |
| 1213 | } else if (object->IsJSObject()) { |
| 1214 | Handle<JSObject> receiver = Handle<JSObject>::cast(object); |
| 1215 | if (receiver->HasExternalArrayElements()) { |
| 1216 | MaybeObject* probe = |
| 1217 | StubCache::ComputeKeyedLoadOrStoreExternalArray(*receiver, |
| 1218 | false); |
| 1219 | stub = probe->IsFailure() ? |
| 1220 | NULL : Code::cast(probe->ToObjectUnchecked()); |
| 1221 | } else if (receiver->HasIndexedInterceptor()) { |
| 1222 | stub = indexed_interceptor_stub(); |
| 1223 | } else if (receiver->HasPixelElements()) { |
| 1224 | MaybeObject* probe = |
| 1225 | StubCache::ComputeKeyedLoadPixelArray(*receiver); |
| 1226 | stub = probe->IsFailure() ? |
| 1227 | NULL : Code::cast(probe->ToObjectUnchecked()); |
| 1228 | } else if (key->IsSmi() && |
| 1229 | receiver->map()->has_fast_elements()) { |
| 1230 | MaybeObject* probe = |
| 1231 | StubCache::ComputeKeyedLoadSpecialized(*receiver); |
| 1232 | stub = probe->IsFailure() ? |
| 1233 | NULL : Code::cast(probe->ToObjectUnchecked()); |
| 1234 | } |
Steve Block | 3ce2e20 | 2009-11-05 08:53:23 +0000 | [diff] [blame] | 1235 | } |
| 1236 | } |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 1237 | if (stub != NULL) set_target(stub); |
| 1238 | |
| 1239 | #ifdef DEBUG |
| 1240 | TraceIC("KeyedLoadIC", key, state, target()); |
| 1241 | #endif // DEBUG |
| 1242 | |
Steve Block | 8defd9f | 2010-07-08 12:39:36 +0100 | [diff] [blame] | 1243 | // For JSObjects with fast elements that are not value wrappers |
| 1244 | // and that do not have indexed interceptors, we initialize the |
| 1245 | // inlined fast case (if present) by patching the inlined map |
| 1246 | // check. |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1247 | if (object->IsJSObject() && |
| 1248 | !object->IsJSValue() && |
Steve Block | 8defd9f | 2010-07-08 12:39:36 +0100 | [diff] [blame] | 1249 | !JSObject::cast(*object)->HasIndexedInterceptor() && |
| 1250 | JSObject::cast(*object)->HasFastElements()) { |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1251 | Map* map = JSObject::cast(*object)->map(); |
| 1252 | PatchInlinedLoad(address(), map); |
| 1253 | } |
| 1254 | } |
| 1255 | |
| 1256 | // Get the property. |
| 1257 | return Runtime::GetObjectProperty(object, key); |
| 1258 | } |
| 1259 | |
| 1260 | |
| 1261 | void KeyedLoadIC::UpdateCaches(LookupResult* lookup, State state, |
| 1262 | Handle<Object> object, Handle<String> name) { |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1263 | // Bail out if we didn't find a result. |
Andrei Popescu | 402d937 | 2010-02-26 13:31:12 +0000 | [diff] [blame] | 1264 | if (!lookup->IsProperty() || !lookup->IsCacheable()) return; |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1265 | |
| 1266 | if (!object->IsJSObject()) return; |
| 1267 | Handle<JSObject> receiver = Handle<JSObject>::cast(object); |
| 1268 | |
Steve Block | 8defd9f | 2010-07-08 12:39:36 +0100 | [diff] [blame] | 1269 | if (HasNormalObjectsInPrototypeChain(lookup, *object)) return; |
| 1270 | |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1271 | // Compute the code stub for this load. |
John Reck | 5913587 | 2010-11-02 12:39:01 -0700 | [diff] [blame] | 1272 | MaybeObject* maybe_code = NULL; |
| 1273 | Object* code; |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1274 | |
| 1275 | if (state == UNINITIALIZED) { |
| 1276 | // This is the first time we execute this inline cache. |
| 1277 | // Set the target to the pre monomorphic stub to delay |
| 1278 | // setting the monomorphic state. |
John Reck | 5913587 | 2010-11-02 12:39:01 -0700 | [diff] [blame] | 1279 | maybe_code = pre_monomorphic_stub(); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1280 | } else { |
| 1281 | // Compute a monomorphic stub. |
| 1282 | switch (lookup->type()) { |
| 1283 | case FIELD: { |
John Reck | 5913587 | 2010-11-02 12:39:01 -0700 | [diff] [blame] | 1284 | maybe_code = StubCache::ComputeKeyedLoadField(*name, *receiver, |
| 1285 | lookup->holder(), |
| 1286 | lookup->GetFieldIndex()); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1287 | break; |
| 1288 | } |
| 1289 | case CONSTANT_FUNCTION: { |
| 1290 | Object* constant = lookup->GetConstantFunction(); |
John Reck | 5913587 | 2010-11-02 12:39:01 -0700 | [diff] [blame] | 1291 | maybe_code = StubCache::ComputeKeyedLoadConstant(*name, |
| 1292 | *receiver, |
| 1293 | lookup->holder(), |
| 1294 | constant); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1295 | break; |
| 1296 | } |
| 1297 | case CALLBACKS: { |
| 1298 | if (!lookup->GetCallbackObject()->IsAccessorInfo()) return; |
| 1299 | AccessorInfo* callback = |
| 1300 | AccessorInfo::cast(lookup->GetCallbackObject()); |
| 1301 | if (v8::ToCData<Address>(callback->getter()) == 0) return; |
John Reck | 5913587 | 2010-11-02 12:39:01 -0700 | [diff] [blame] | 1302 | maybe_code = StubCache::ComputeKeyedLoadCallback(*name, |
| 1303 | *receiver, |
| 1304 | lookup->holder(), |
| 1305 | callback); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1306 | break; |
| 1307 | } |
| 1308 | case INTERCEPTOR: { |
| 1309 | ASSERT(HasInterceptorGetter(lookup->holder())); |
John Reck | 5913587 | 2010-11-02 12:39:01 -0700 | [diff] [blame] | 1310 | maybe_code = StubCache::ComputeKeyedLoadInterceptor(*name, *receiver, |
| 1311 | lookup->holder()); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1312 | break; |
| 1313 | } |
| 1314 | default: { |
| 1315 | // Always rewrite to the generic case so that we do not |
| 1316 | // repeatedly try to rewrite. |
John Reck | 5913587 | 2010-11-02 12:39:01 -0700 | [diff] [blame] | 1317 | maybe_code = generic_stub(); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1318 | break; |
| 1319 | } |
| 1320 | } |
| 1321 | } |
| 1322 | |
| 1323 | // If we're unable to compute the stub (not enough memory left), we |
| 1324 | // simply avoid updating the caches. |
John Reck | 5913587 | 2010-11-02 12:39:01 -0700 | [diff] [blame] | 1325 | if (maybe_code == NULL || !maybe_code->ToObject(&code)) return; |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1326 | |
| 1327 | // Patch the call site depending on the state of the cache. Make |
| 1328 | // sure to always rewrite from monomorphic to megamorphic. |
| 1329 | ASSERT(state != MONOMORPHIC_PROTOTYPE_FAILURE); |
| 1330 | if (state == UNINITIALIZED || state == PREMONOMORPHIC) { |
| 1331 | set_target(Code::cast(code)); |
| 1332 | } else if (state == MONOMORPHIC) { |
| 1333 | set_target(megamorphic_stub()); |
| 1334 | } |
| 1335 | |
| 1336 | #ifdef DEBUG |
| 1337 | TraceIC("KeyedLoadIC", name, state, target()); |
| 1338 | #endif |
| 1339 | } |
| 1340 | |
| 1341 | |
| 1342 | static bool StoreICableLookup(LookupResult* lookup) { |
| 1343 | // Bail out if we didn't find a result. |
Andrei Popescu | 402d937 | 2010-02-26 13:31:12 +0000 | [diff] [blame] | 1344 | if (!lookup->IsPropertyOrTransition() || !lookup->IsCacheable()) return false; |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1345 | |
| 1346 | // If the property is read-only, we leave the IC in its current |
| 1347 | // state. |
| 1348 | if (lookup->IsReadOnly()) return false; |
| 1349 | |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1350 | return true; |
| 1351 | } |
| 1352 | |
| 1353 | |
| 1354 | static bool LookupForWrite(JSObject* object, |
| 1355 | String* name, |
| 1356 | LookupResult* lookup) { |
| 1357 | object->LocalLookup(name, lookup); |
| 1358 | if (!StoreICableLookup(lookup)) { |
| 1359 | return false; |
| 1360 | } |
| 1361 | |
| 1362 | if (lookup->type() == INTERCEPTOR) { |
| 1363 | if (object->GetNamedInterceptor()->setter()->IsUndefined()) { |
| 1364 | object->LocalLookupRealNamedProperty(name, lookup); |
| 1365 | return StoreICableLookup(lookup); |
| 1366 | } |
| 1367 | } |
| 1368 | |
| 1369 | return true; |
| 1370 | } |
| 1371 | |
| 1372 | |
John Reck | 5913587 | 2010-11-02 12:39:01 -0700 | [diff] [blame] | 1373 | MaybeObject* StoreIC::Store(State state, |
Steve Block | 1e0659c | 2011-05-24 12:43:12 +0100 | [diff] [blame^] | 1374 | Code::ExtraICState extra_ic_state, |
John Reck | 5913587 | 2010-11-02 12:39:01 -0700 | [diff] [blame] | 1375 | Handle<Object> object, |
| 1376 | Handle<String> name, |
| 1377 | Handle<Object> value) { |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1378 | // If the object is undefined or null it's illegal to try to set any |
| 1379 | // properties on it; throw a TypeError in that case. |
| 1380 | if (object->IsUndefined() || object->IsNull()) { |
| 1381 | return TypeError("non_object_property_store", object, name); |
| 1382 | } |
| 1383 | |
| 1384 | // Ignore stores where the receiver is not a JSObject. |
| 1385 | if (!object->IsJSObject()) return *value; |
| 1386 | Handle<JSObject> receiver = Handle<JSObject>::cast(object); |
| 1387 | |
| 1388 | // Check if the given name is an array index. |
| 1389 | uint32_t index; |
| 1390 | if (name->AsArrayIndex(&index)) { |
| 1391 | HandleScope scope; |
| 1392 | Handle<Object> result = SetElement(receiver, index, value); |
| 1393 | if (result.is_null()) return Failure::Exception(); |
| 1394 | return *value; |
| 1395 | } |
| 1396 | |
Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [diff] [blame] | 1397 | // Use specialized code for setting the length of arrays. |
| 1398 | if (receiver->IsJSArray() |
| 1399 | && name->Equals(Heap::length_symbol()) |
| 1400 | && receiver->AllowsSetElementsLength()) { |
| 1401 | #ifdef DEBUG |
| 1402 | if (FLAG_trace_ic) PrintF("[StoreIC : +#length /array]\n"); |
| 1403 | #endif |
Steve Block | 1e0659c | 2011-05-24 12:43:12 +0100 | [diff] [blame^] | 1404 | Builtins::Name target = (extra_ic_state == kStoreICStrict) |
| 1405 | ? Builtins::StoreIC_ArrayLength_Strict |
| 1406 | : Builtins::StoreIC_ArrayLength; |
| 1407 | set_target(Builtins::builtin(target)); |
Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [diff] [blame] | 1408 | return receiver->SetProperty(*name, *value, NONE); |
| 1409 | } |
| 1410 | |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1411 | // Lookup the property locally in the receiver. |
| 1412 | if (FLAG_use_ic && !receiver->IsJSGlobalProxy()) { |
| 1413 | LookupResult lookup; |
Kristian Monsen | 50ef84f | 2010-07-29 15:18:00 +0100 | [diff] [blame] | 1414 | |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1415 | if (LookupForWrite(*receiver, *name, &lookup)) { |
Kristian Monsen | 50ef84f | 2010-07-29 15:18:00 +0100 | [diff] [blame] | 1416 | bool can_be_inlined = |
| 1417 | state == UNINITIALIZED && |
| 1418 | lookup.IsProperty() && |
| 1419 | lookup.holder() == *receiver && |
| 1420 | lookup.type() == FIELD && |
| 1421 | !receiver->IsAccessCheckNeeded(); |
| 1422 | |
| 1423 | if (can_be_inlined) { |
| 1424 | Map* map = lookup.holder()->map(); |
| 1425 | // Property's index in the properties array. If negative we have |
| 1426 | // an inobject property. |
| 1427 | int index = lookup.GetFieldIndex() - map->inobject_properties(); |
| 1428 | if (index < 0) { |
| 1429 | // Index is an offset from the end of the object. |
| 1430 | int offset = map->instance_size() + (index * kPointerSize); |
| 1431 | if (PatchInlinedStore(address(), map, offset)) { |
| 1432 | set_target(megamorphic_stub()); |
| 1433 | #ifdef DEBUG |
| 1434 | if (FLAG_trace_ic) { |
| 1435 | PrintF("[StoreIC : inline patch %s]\n", *name->ToCString()); |
| 1436 | } |
| 1437 | #endif |
| 1438 | return receiver->SetProperty(*name, *value, NONE); |
| 1439 | #ifdef DEBUG |
| 1440 | |
| 1441 | } else { |
| 1442 | if (FLAG_trace_ic) { |
| 1443 | PrintF("[StoreIC : no inline patch %s (patching failed)]\n", |
| 1444 | *name->ToCString()); |
| 1445 | } |
| 1446 | } |
| 1447 | } else { |
| 1448 | if (FLAG_trace_ic) { |
| 1449 | PrintF("[StoreIC : no inline patch %s (not inobject)]\n", |
| 1450 | *name->ToCString()); |
| 1451 | } |
| 1452 | } |
| 1453 | } else { |
| 1454 | if (state == PREMONOMORPHIC) { |
| 1455 | if (FLAG_trace_ic) { |
| 1456 | PrintF("[StoreIC : no inline patch %s (not inlinable)]\n", |
| 1457 | *name->ToCString()); |
| 1458 | #endif |
| 1459 | } |
| 1460 | } |
| 1461 | } |
| 1462 | |
| 1463 | // If no inlined store ic was patched, generate a stub for this |
| 1464 | // store. |
Steve Block | 1e0659c | 2011-05-24 12:43:12 +0100 | [diff] [blame^] | 1465 | UpdateCaches(&lookup, state, extra_ic_state, receiver, name, value); |
| 1466 | } else { |
| 1467 | // Strict mode doesn't allow setting non-existent global property. |
| 1468 | if (extra_ic_state == kStoreICStrict && IsContextual(object)) { |
| 1469 | return ReferenceError("not_defined", name); |
| 1470 | } |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1471 | } |
| 1472 | } |
| 1473 | |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 1474 | if (receiver->IsJSGlobalProxy()) { |
| 1475 | // Generate a generic stub that goes to the runtime when we see a global |
| 1476 | // proxy as receiver. |
Steve Block | 1e0659c | 2011-05-24 12:43:12 +0100 | [diff] [blame^] | 1477 | Code* stub = (extra_ic_state == kStoreICStrict) |
| 1478 | ? global_proxy_stub_strict() |
| 1479 | : global_proxy_stub(); |
| 1480 | if (target() != stub) { |
| 1481 | set_target(stub); |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 1482 | #ifdef DEBUG |
| 1483 | TraceIC("StoreIC", name, state, target()); |
| 1484 | #endif |
| 1485 | } |
| 1486 | } |
| 1487 | |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1488 | // Set the property. |
| 1489 | return receiver->SetProperty(*name, *value, NONE); |
| 1490 | } |
| 1491 | |
| 1492 | |
| 1493 | void StoreIC::UpdateCaches(LookupResult* lookup, |
| 1494 | State state, |
Steve Block | 1e0659c | 2011-05-24 12:43:12 +0100 | [diff] [blame^] | 1495 | Code::ExtraICState extra_ic_state, |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1496 | Handle<JSObject> receiver, |
| 1497 | Handle<String> name, |
| 1498 | Handle<Object> value) { |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1499 | // Skip JSGlobalProxy. |
| 1500 | ASSERT(!receiver->IsJSGlobalProxy()); |
| 1501 | |
| 1502 | ASSERT(StoreICableLookup(lookup)); |
| 1503 | |
| 1504 | // If the property has a non-field type allowing map transitions |
| 1505 | // where there is extra room in the object, we leave the IC in its |
| 1506 | // current state. |
| 1507 | PropertyType type = lookup->type(); |
| 1508 | |
| 1509 | // Compute the code stub for this store; used for rewriting to |
| 1510 | // monomorphic state and making sure that the code stub is in the |
| 1511 | // stub cache. |
John Reck | 5913587 | 2010-11-02 12:39:01 -0700 | [diff] [blame] | 1512 | MaybeObject* maybe_code = NULL; |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1513 | Object* code = NULL; |
| 1514 | switch (type) { |
| 1515 | case FIELD: { |
Steve Block | 1e0659c | 2011-05-24 12:43:12 +0100 | [diff] [blame^] | 1516 | maybe_code = StubCache::ComputeStoreField( |
| 1517 | *name, *receiver, lookup->GetFieldIndex(), NULL, extra_ic_state); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1518 | break; |
| 1519 | } |
| 1520 | case MAP_TRANSITION: { |
| 1521 | if (lookup->GetAttributes() != NONE) return; |
| 1522 | HandleScope scope; |
| 1523 | ASSERT(type == MAP_TRANSITION); |
| 1524 | Handle<Map> transition(lookup->GetTransitionMap()); |
| 1525 | int index = transition->PropertyIndexFor(*name); |
Steve Block | 1e0659c | 2011-05-24 12:43:12 +0100 | [diff] [blame^] | 1526 | maybe_code = StubCache::ComputeStoreField( |
| 1527 | *name, *receiver, index, *transition, extra_ic_state); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1528 | break; |
| 1529 | } |
| 1530 | case NORMAL: { |
Steve Block | 8defd9f | 2010-07-08 12:39:36 +0100 | [diff] [blame] | 1531 | if (receiver->IsGlobalObject()) { |
| 1532 | // The stub generated for the global object picks the value directly |
| 1533 | // from the property cell. So the property must be directly on the |
| 1534 | // global object. |
| 1535 | Handle<GlobalObject> global = Handle<GlobalObject>::cast(receiver); |
| 1536 | JSGlobalPropertyCell* cell = |
| 1537 | JSGlobalPropertyCell::cast(global->GetPropertyCell(lookup)); |
Steve Block | 1e0659c | 2011-05-24 12:43:12 +0100 | [diff] [blame^] | 1538 | maybe_code = StubCache::ComputeStoreGlobal( |
| 1539 | *name, *global, cell, extra_ic_state); |
Steve Block | 8defd9f | 2010-07-08 12:39:36 +0100 | [diff] [blame] | 1540 | } else { |
| 1541 | if (lookup->holder() != *receiver) return; |
Steve Block | 1e0659c | 2011-05-24 12:43:12 +0100 | [diff] [blame^] | 1542 | maybe_code = StubCache::ComputeStoreNormal(extra_ic_state); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1543 | } |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1544 | break; |
| 1545 | } |
| 1546 | case CALLBACKS: { |
| 1547 | if (!lookup->GetCallbackObject()->IsAccessorInfo()) return; |
| 1548 | AccessorInfo* callback = AccessorInfo::cast(lookup->GetCallbackObject()); |
| 1549 | if (v8::ToCData<Address>(callback->setter()) == 0) return; |
Steve Block | 1e0659c | 2011-05-24 12:43:12 +0100 | [diff] [blame^] | 1550 | maybe_code = StubCache::ComputeStoreCallback( |
| 1551 | *name, *receiver, callback, extra_ic_state); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1552 | break; |
| 1553 | } |
| 1554 | case INTERCEPTOR: { |
| 1555 | ASSERT(!receiver->GetNamedInterceptor()->setter()->IsUndefined()); |
Steve Block | 1e0659c | 2011-05-24 12:43:12 +0100 | [diff] [blame^] | 1556 | maybe_code = StubCache::ComputeStoreInterceptor( |
| 1557 | *name, *receiver, extra_ic_state); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1558 | break; |
| 1559 | } |
| 1560 | default: |
| 1561 | return; |
| 1562 | } |
| 1563 | |
| 1564 | // If we're unable to compute the stub (not enough memory left), we |
| 1565 | // simply avoid updating the caches. |
John Reck | 5913587 | 2010-11-02 12:39:01 -0700 | [diff] [blame] | 1566 | if (maybe_code == NULL || !maybe_code->ToObject(&code)) return; |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1567 | |
| 1568 | // Patch the call site depending on the state of the cache. |
| 1569 | if (state == UNINITIALIZED || state == MONOMORPHIC_PROTOTYPE_FAILURE) { |
| 1570 | set_target(Code::cast(code)); |
| 1571 | } else if (state == MONOMORPHIC) { |
Kristian Monsen | 9dcf7e2 | 2010-06-28 14:14:28 +0100 | [diff] [blame] | 1572 | // Only move to megamorphic if the target changes. |
Steve Block | 1e0659c | 2011-05-24 12:43:12 +0100 | [diff] [blame^] | 1573 | if (target() != Code::cast(code)) { |
| 1574 | set_target(extra_ic_state == kStoreICStrict |
| 1575 | ? megamorphic_stub_strict() |
| 1576 | : megamorphic_stub()); |
| 1577 | } |
Kristian Monsen | 9dcf7e2 | 2010-06-28 14:14:28 +0100 | [diff] [blame] | 1578 | } else if (state == MEGAMORPHIC) { |
| 1579 | // Update the stub cache. |
| 1580 | StubCache::Set(*name, receiver->map(), Code::cast(code)); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1581 | } |
| 1582 | |
| 1583 | #ifdef DEBUG |
| 1584 | TraceIC("StoreIC", name, state, target()); |
| 1585 | #endif |
| 1586 | } |
| 1587 | |
| 1588 | |
John Reck | 5913587 | 2010-11-02 12:39:01 -0700 | [diff] [blame] | 1589 | MaybeObject* KeyedStoreIC::Store(State state, |
| 1590 | Handle<Object> object, |
| 1591 | Handle<Object> key, |
| 1592 | Handle<Object> value) { |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1593 | if (key->IsSymbol()) { |
| 1594 | Handle<String> name = Handle<String>::cast(key); |
| 1595 | |
| 1596 | // If the object is undefined or null it's illegal to try to set any |
| 1597 | // properties on it; throw a TypeError in that case. |
| 1598 | if (object->IsUndefined() || object->IsNull()) { |
| 1599 | return TypeError("non_object_property_store", object, name); |
| 1600 | } |
| 1601 | |
| 1602 | // Ignore stores where the receiver is not a JSObject. |
| 1603 | if (!object->IsJSObject()) return *value; |
| 1604 | Handle<JSObject> receiver = Handle<JSObject>::cast(object); |
| 1605 | |
| 1606 | // Check if the given name is an array index. |
| 1607 | uint32_t index; |
| 1608 | if (name->AsArrayIndex(&index)) { |
| 1609 | HandleScope scope; |
| 1610 | Handle<Object> result = SetElement(receiver, index, value); |
| 1611 | if (result.is_null()) return Failure::Exception(); |
| 1612 | return *value; |
| 1613 | } |
| 1614 | |
| 1615 | // Lookup the property locally in the receiver. |
| 1616 | LookupResult lookup; |
| 1617 | receiver->LocalLookup(*name, &lookup); |
| 1618 | |
| 1619 | // Update inline cache and stub cache. |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 1620 | if (FLAG_use_ic) { |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1621 | UpdateCaches(&lookup, state, receiver, name, value); |
| 1622 | } |
| 1623 | |
| 1624 | // Set the property. |
| 1625 | return receiver->SetProperty(*name, *value, NONE); |
| 1626 | } |
| 1627 | |
| 1628 | // Do not use ICs for objects that require access checks (including |
| 1629 | // the global object). |
| 1630 | bool use_ic = FLAG_use_ic && !object->IsAccessCheckNeeded(); |
| 1631 | ASSERT(!(use_ic && object->IsJSGlobalProxy())); |
| 1632 | |
Steve Block | 3ce2e20 | 2009-11-05 08:53:23 +0000 | [diff] [blame] | 1633 | if (use_ic) { |
| 1634 | Code* stub = generic_stub(); |
| 1635 | if (object->IsJSObject()) { |
| 1636 | Handle<JSObject> receiver = Handle<JSObject>::cast(object); |
| 1637 | if (receiver->HasExternalArrayElements()) { |
Steve Block | 1e0659c | 2011-05-24 12:43:12 +0100 | [diff] [blame^] | 1638 | MaybeObject* probe = |
| 1639 | StubCache::ComputeKeyedLoadOrStoreExternalArray(*receiver, true); |
| 1640 | stub = |
| 1641 | probe->IsFailure() ? NULL : Code::cast(probe->ToObjectUnchecked()); |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 1642 | } else if (state == UNINITIALIZED && |
| 1643 | key->IsSmi() && |
| 1644 | receiver->map()->has_fast_elements()) { |
| 1645 | MaybeObject* probe = StubCache::ComputeKeyedStoreSpecialized(*receiver); |
| 1646 | stub = |
| 1647 | probe->IsFailure() ? NULL : Code::cast(probe->ToObjectUnchecked()); |
Steve Block | 3ce2e20 | 2009-11-05 08:53:23 +0000 | [diff] [blame] | 1648 | } |
| 1649 | } |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 1650 | if (stub != NULL) set_target(stub); |
Steve Block | 3ce2e20 | 2009-11-05 08:53:23 +0000 | [diff] [blame] | 1651 | } |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1652 | |
| 1653 | // Set the property. |
| 1654 | return Runtime::SetObjectProperty(object, key, value, NONE); |
| 1655 | } |
| 1656 | |
| 1657 | |
| 1658 | void KeyedStoreIC::UpdateCaches(LookupResult* lookup, |
| 1659 | State state, |
| 1660 | Handle<JSObject> receiver, |
| 1661 | Handle<String> name, |
| 1662 | Handle<Object> value) { |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1663 | // Skip JSGlobalProxy. |
| 1664 | if (receiver->IsJSGlobalProxy()) return; |
| 1665 | |
| 1666 | // Bail out if we didn't find a result. |
Andrei Popescu | 402d937 | 2010-02-26 13:31:12 +0000 | [diff] [blame] | 1667 | if (!lookup->IsPropertyOrTransition() || !lookup->IsCacheable()) return; |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1668 | |
| 1669 | // If the property is read-only, we leave the IC in its current |
| 1670 | // state. |
| 1671 | if (lookup->IsReadOnly()) return; |
| 1672 | |
| 1673 | // If the property has a non-field type allowing map transitions |
| 1674 | // where there is extra room in the object, we leave the IC in its |
| 1675 | // current state. |
| 1676 | PropertyType type = lookup->type(); |
| 1677 | |
| 1678 | // Compute the code stub for this store; used for rewriting to |
| 1679 | // monomorphic state and making sure that the code stub is in the |
| 1680 | // stub cache. |
John Reck | 5913587 | 2010-11-02 12:39:01 -0700 | [diff] [blame] | 1681 | MaybeObject* maybe_code = NULL; |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1682 | Object* code = NULL; |
| 1683 | |
| 1684 | switch (type) { |
| 1685 | case FIELD: { |
John Reck | 5913587 | 2010-11-02 12:39:01 -0700 | [diff] [blame] | 1686 | maybe_code = StubCache::ComputeKeyedStoreField(*name, *receiver, |
| 1687 | lookup->GetFieldIndex()); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1688 | break; |
| 1689 | } |
| 1690 | case MAP_TRANSITION: { |
| 1691 | if (lookup->GetAttributes() == NONE) { |
| 1692 | HandleScope scope; |
| 1693 | ASSERT(type == MAP_TRANSITION); |
| 1694 | Handle<Map> transition(lookup->GetTransitionMap()); |
| 1695 | int index = transition->PropertyIndexFor(*name); |
John Reck | 5913587 | 2010-11-02 12:39:01 -0700 | [diff] [blame] | 1696 | maybe_code = StubCache::ComputeKeyedStoreField(*name, *receiver, |
| 1697 | index, *transition); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1698 | break; |
| 1699 | } |
| 1700 | // fall through. |
| 1701 | } |
| 1702 | default: { |
| 1703 | // Always rewrite to the generic case so that we do not |
| 1704 | // repeatedly try to rewrite. |
John Reck | 5913587 | 2010-11-02 12:39:01 -0700 | [diff] [blame] | 1705 | maybe_code = generic_stub(); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1706 | break; |
| 1707 | } |
| 1708 | } |
| 1709 | |
| 1710 | // If we're unable to compute the stub (not enough memory left), we |
| 1711 | // simply avoid updating the caches. |
John Reck | 5913587 | 2010-11-02 12:39:01 -0700 | [diff] [blame] | 1712 | if (maybe_code == NULL || !maybe_code->ToObject(&code)) return; |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1713 | |
| 1714 | // Patch the call site depending on the state of the cache. Make |
| 1715 | // sure to always rewrite from monomorphic to megamorphic. |
| 1716 | ASSERT(state != MONOMORPHIC_PROTOTYPE_FAILURE); |
| 1717 | if (state == UNINITIALIZED || state == PREMONOMORPHIC) { |
| 1718 | set_target(Code::cast(code)); |
| 1719 | } else if (state == MONOMORPHIC) { |
| 1720 | set_target(megamorphic_stub()); |
| 1721 | } |
| 1722 | |
| 1723 | #ifdef DEBUG |
| 1724 | TraceIC("KeyedStoreIC", name, state, target()); |
| 1725 | #endif |
| 1726 | } |
| 1727 | |
| 1728 | |
| 1729 | // ---------------------------------------------------------------------------- |
| 1730 | // Static IC stub generators. |
| 1731 | // |
| 1732 | |
Ben Murdoch | f87a203 | 2010-10-22 12:50:53 +0100 | [diff] [blame] | 1733 | static JSFunction* CompileFunction(JSFunction* function, |
| 1734 | InLoopFlag in_loop) { |
Ben Murdoch | 7f4d5bd | 2010-06-15 11:15:29 +0100 | [diff] [blame] | 1735 | // Compile now with optimization. |
| 1736 | HandleScope scope; |
Ben Murdoch | f87a203 | 2010-10-22 12:50:53 +0100 | [diff] [blame] | 1737 | Handle<JSFunction> function_handle(function); |
Ben Murdoch | 7f4d5bd | 2010-06-15 11:15:29 +0100 | [diff] [blame] | 1738 | if (in_loop == IN_LOOP) { |
Ben Murdoch | f87a203 | 2010-10-22 12:50:53 +0100 | [diff] [blame] | 1739 | CompileLazyInLoop(function_handle, CLEAR_EXCEPTION); |
Ben Murdoch | 7f4d5bd | 2010-06-15 11:15:29 +0100 | [diff] [blame] | 1740 | } else { |
Ben Murdoch | f87a203 | 2010-10-22 12:50:53 +0100 | [diff] [blame] | 1741 | CompileLazy(function_handle, CLEAR_EXCEPTION); |
Ben Murdoch | 7f4d5bd | 2010-06-15 11:15:29 +0100 | [diff] [blame] | 1742 | } |
Ben Murdoch | f87a203 | 2010-10-22 12:50:53 +0100 | [diff] [blame] | 1743 | return *function_handle; |
Ben Murdoch | 7f4d5bd | 2010-06-15 11:15:29 +0100 | [diff] [blame] | 1744 | } |
| 1745 | |
| 1746 | |
| 1747 | // Used from ic-<arch>.cc. |
John Reck | 5913587 | 2010-11-02 12:39:01 -0700 | [diff] [blame] | 1748 | MUST_USE_RESULT MaybeObject* CallIC_Miss(Arguments args) { |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1749 | NoHandleAllocation na; |
| 1750 | ASSERT(args.length() == 2); |
| 1751 | CallIC ic; |
Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [diff] [blame] | 1752 | IC::State state = IC::StateFrom(ic.target(), args[0], args[1]); |
Ben Murdoch | b8e0da2 | 2011-05-16 14:20:40 +0100 | [diff] [blame] | 1753 | Code::ExtraICState extra_ic_state = ic.target()->extra_ic_state(); |
| 1754 | MaybeObject* maybe_result = ic.LoadFunction(state, |
| 1755 | extra_ic_state, |
| 1756 | args.at<Object>(0), |
| 1757 | args.at<String>(1)); |
John Reck | 5913587 | 2010-11-02 12:39:01 -0700 | [diff] [blame] | 1758 | Object* result; |
Ben Murdoch | b8e0da2 | 2011-05-16 14:20:40 +0100 | [diff] [blame] | 1759 | if (!maybe_result->ToObject(&result)) return maybe_result; |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1760 | |
| 1761 | // The first time the inline cache is updated may be the first time the |
| 1762 | // function it references gets called. If the function was lazily compiled |
| 1763 | // then the first call will trigger a compilation. We check for this case |
| 1764 | // and we do the compilation immediately, instead of waiting for the stub |
| 1765 | // currently attached to the JSFunction object to trigger compilation. We |
| 1766 | // do this in the case where we know that the inline cache is inside a loop, |
| 1767 | // because then we know that we want to optimize the function. |
| 1768 | if (!result->IsJSFunction() || JSFunction::cast(result)->is_compiled()) { |
| 1769 | return result; |
| 1770 | } |
Ben Murdoch | f87a203 | 2010-10-22 12:50:53 +0100 | [diff] [blame] | 1771 | return CompileFunction(JSFunction::cast(result), ic.target()->ic_in_loop()); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1772 | } |
| 1773 | |
| 1774 | |
Ben Murdoch | 7f4d5bd | 2010-06-15 11:15:29 +0100 | [diff] [blame] | 1775 | // Used from ic-<arch>.cc. |
John Reck | 5913587 | 2010-11-02 12:39:01 -0700 | [diff] [blame] | 1776 | MUST_USE_RESULT MaybeObject* KeyedCallIC_Miss(Arguments args) { |
Ben Murdoch | 7f4d5bd | 2010-06-15 11:15:29 +0100 | [diff] [blame] | 1777 | NoHandleAllocation na; |
| 1778 | ASSERT(args.length() == 2); |
| 1779 | KeyedCallIC ic; |
| 1780 | IC::State state = IC::StateFrom(ic.target(), args[0], args[1]); |
John Reck | 5913587 | 2010-11-02 12:39:01 -0700 | [diff] [blame] | 1781 | Object* result; |
| 1782 | { MaybeObject* maybe_result = |
Ben Murdoch | 7f4d5bd | 2010-06-15 11:15:29 +0100 | [diff] [blame] | 1783 | ic.LoadFunction(state, args.at<Object>(0), args.at<Object>(1)); |
John Reck | 5913587 | 2010-11-02 12:39:01 -0700 | [diff] [blame] | 1784 | if (!maybe_result->ToObject(&result)) return maybe_result; |
| 1785 | } |
Ben Murdoch | 7f4d5bd | 2010-06-15 11:15:29 +0100 | [diff] [blame] | 1786 | |
| 1787 | if (!result->IsJSFunction() || JSFunction::cast(result)->is_compiled()) { |
| 1788 | return result; |
| 1789 | } |
Ben Murdoch | f87a203 | 2010-10-22 12:50:53 +0100 | [diff] [blame] | 1790 | return CompileFunction(JSFunction::cast(result), ic.target()->ic_in_loop()); |
Ben Murdoch | 7f4d5bd | 2010-06-15 11:15:29 +0100 | [diff] [blame] | 1791 | } |
| 1792 | |
| 1793 | |
| 1794 | // Used from ic-<arch>.cc. |
John Reck | 5913587 | 2010-11-02 12:39:01 -0700 | [diff] [blame] | 1795 | MUST_USE_RESULT MaybeObject* LoadIC_Miss(Arguments args) { |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1796 | NoHandleAllocation na; |
| 1797 | ASSERT(args.length() == 2); |
| 1798 | LoadIC ic; |
Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [diff] [blame] | 1799 | IC::State state = IC::StateFrom(ic.target(), args[0], args[1]); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1800 | return ic.Load(state, args.at<Object>(0), args.at<String>(1)); |
| 1801 | } |
| 1802 | |
| 1803 | |
Ben Murdoch | 7f4d5bd | 2010-06-15 11:15:29 +0100 | [diff] [blame] | 1804 | // Used from ic-<arch>.cc |
John Reck | 5913587 | 2010-11-02 12:39:01 -0700 | [diff] [blame] | 1805 | MUST_USE_RESULT MaybeObject* KeyedLoadIC_Miss(Arguments args) { |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1806 | NoHandleAllocation na; |
| 1807 | ASSERT(args.length() == 2); |
| 1808 | KeyedLoadIC ic; |
Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [diff] [blame] | 1809 | IC::State state = IC::StateFrom(ic.target(), args[0], args[1]); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1810 | return ic.Load(state, args.at<Object>(0), args.at<Object>(1)); |
| 1811 | } |
| 1812 | |
| 1813 | |
Ben Murdoch | 7f4d5bd | 2010-06-15 11:15:29 +0100 | [diff] [blame] | 1814 | // Used from ic-<arch>.cc. |
John Reck | 5913587 | 2010-11-02 12:39:01 -0700 | [diff] [blame] | 1815 | MUST_USE_RESULT MaybeObject* StoreIC_Miss(Arguments args) { |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1816 | NoHandleAllocation na; |
| 1817 | ASSERT(args.length() == 3); |
| 1818 | StoreIC ic; |
Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [diff] [blame] | 1819 | IC::State state = IC::StateFrom(ic.target(), args[0], args[1]); |
Steve Block | 1e0659c | 2011-05-24 12:43:12 +0100 | [diff] [blame^] | 1820 | Code::ExtraICState extra_ic_state = ic.target()->extra_ic_state(); |
| 1821 | return ic.Store(state, extra_ic_state, args.at<Object>(0), |
| 1822 | args.at<String>(1), args.at<Object>(2)); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1823 | } |
| 1824 | |
| 1825 | |
John Reck | 5913587 | 2010-11-02 12:39:01 -0700 | [diff] [blame] | 1826 | MUST_USE_RESULT MaybeObject* StoreIC_ArrayLength(Arguments args) { |
Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [diff] [blame] | 1827 | NoHandleAllocation nha; |
| 1828 | |
| 1829 | ASSERT(args.length() == 2); |
| 1830 | JSObject* receiver = JSObject::cast(args[0]); |
| 1831 | Object* len = args[1]; |
| 1832 | |
John Reck | 5913587 | 2010-11-02 12:39:01 -0700 | [diff] [blame] | 1833 | // The generated code should filter out non-Smis before we get here. |
| 1834 | ASSERT(len->IsSmi()); |
| 1835 | |
| 1836 | Object* result; |
| 1837 | { MaybeObject* maybe_result = receiver->SetElementsLength(len); |
| 1838 | if (!maybe_result->ToObject(&result)) return maybe_result; |
| 1839 | } |
Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [diff] [blame] | 1840 | return len; |
| 1841 | } |
| 1842 | |
| 1843 | |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1844 | // Extend storage is called in a store inline cache when |
| 1845 | // it is necessary to extend the properties array of a |
| 1846 | // JSObject. |
John Reck | 5913587 | 2010-11-02 12:39:01 -0700 | [diff] [blame] | 1847 | MUST_USE_RESULT MaybeObject* SharedStoreIC_ExtendStorage(Arguments args) { |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1848 | NoHandleAllocation na; |
| 1849 | ASSERT(args.length() == 3); |
| 1850 | |
| 1851 | // Convert the parameters |
| 1852 | JSObject* object = JSObject::cast(args[0]); |
| 1853 | Map* transition = Map::cast(args[1]); |
| 1854 | Object* value = args[2]; |
| 1855 | |
| 1856 | // Check the object has run out out property space. |
| 1857 | ASSERT(object->HasFastProperties()); |
| 1858 | ASSERT(object->map()->unused_property_fields() == 0); |
| 1859 | |
| 1860 | // Expand the properties array. |
| 1861 | FixedArray* old_storage = object->properties(); |
| 1862 | int new_unused = transition->unused_property_fields(); |
| 1863 | int new_size = old_storage->length() + new_unused + 1; |
John Reck | 5913587 | 2010-11-02 12:39:01 -0700 | [diff] [blame] | 1864 | Object* result; |
| 1865 | { MaybeObject* maybe_result = old_storage->CopySize(new_size); |
| 1866 | if (!maybe_result->ToObject(&result)) return maybe_result; |
| 1867 | } |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1868 | FixedArray* new_storage = FixedArray::cast(result); |
| 1869 | new_storage->set(old_storage->length(), value); |
| 1870 | |
| 1871 | // Set the new property value and do the map transition. |
| 1872 | object->set_properties(new_storage); |
| 1873 | object->set_map(transition); |
| 1874 | |
| 1875 | // Return the stored value. |
| 1876 | return value; |
| 1877 | } |
| 1878 | |
| 1879 | |
Ben Murdoch | 7f4d5bd | 2010-06-15 11:15:29 +0100 | [diff] [blame] | 1880 | // Used from ic-<arch>.cc. |
John Reck | 5913587 | 2010-11-02 12:39:01 -0700 | [diff] [blame] | 1881 | MUST_USE_RESULT MaybeObject* KeyedStoreIC_Miss(Arguments args) { |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1882 | NoHandleAllocation na; |
| 1883 | ASSERT(args.length() == 3); |
| 1884 | KeyedStoreIC ic; |
Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [diff] [blame] | 1885 | IC::State state = IC::StateFrom(ic.target(), args[0], args[1]); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1886 | return ic.Store(state, args.at<Object>(0), args.at<Object>(1), |
| 1887 | args.at<Object>(2)); |
| 1888 | } |
| 1889 | |
| 1890 | |
Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [diff] [blame] | 1891 | void BinaryOpIC::patch(Code* code) { |
| 1892 | set_target(code); |
| 1893 | } |
| 1894 | |
| 1895 | |
| 1896 | const char* BinaryOpIC::GetName(TypeInfo type_info) { |
| 1897 | switch (type_info) { |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 1898 | case UNINIT_OR_SMI: return "UninitOrSmi"; |
Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [diff] [blame] | 1899 | case DEFAULT: return "Default"; |
| 1900 | case GENERIC: return "Generic"; |
| 1901 | case HEAP_NUMBERS: return "HeapNumbers"; |
| 1902 | case STRINGS: return "Strings"; |
| 1903 | default: return "Invalid"; |
| 1904 | } |
| 1905 | } |
| 1906 | |
| 1907 | |
| 1908 | BinaryOpIC::State BinaryOpIC::ToState(TypeInfo type_info) { |
| 1909 | switch (type_info) { |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 1910 | case UNINIT_OR_SMI: |
| 1911 | return UNINITIALIZED; |
| 1912 | case DEFAULT: |
| 1913 | case HEAP_NUMBERS: |
| 1914 | case STRINGS: |
| 1915 | return MONOMORPHIC; |
| 1916 | case GENERIC: |
| 1917 | return MEGAMORPHIC; |
Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [diff] [blame] | 1918 | } |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 1919 | UNREACHABLE(); |
| 1920 | return UNINITIALIZED; |
Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [diff] [blame] | 1921 | } |
| 1922 | |
| 1923 | |
| 1924 | BinaryOpIC::TypeInfo BinaryOpIC::GetTypeInfo(Object* left, |
| 1925 | Object* right) { |
| 1926 | if (left->IsSmi() && right->IsSmi()) { |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 1927 | // If we have two smi inputs we can reach here because |
| 1928 | // of an overflow. Enter default state. |
| 1929 | return DEFAULT; |
Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [diff] [blame] | 1930 | } |
| 1931 | |
| 1932 | if (left->IsNumber() && right->IsNumber()) { |
| 1933 | return HEAP_NUMBERS; |
| 1934 | } |
| 1935 | |
| 1936 | if (left->IsString() || right->IsString()) { |
| 1937 | // Patching for fast string ADD makes sense even if only one of the |
| 1938 | // arguments is a string. |
| 1939 | return STRINGS; |
| 1940 | } |
| 1941 | |
| 1942 | return GENERIC; |
| 1943 | } |
| 1944 | |
| 1945 | |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 1946 | // defined in code-stubs-<arch>.cc |
Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [diff] [blame] | 1947 | Handle<Code> GetBinaryOpStub(int key, BinaryOpIC::TypeInfo type_info); |
| 1948 | |
| 1949 | |
John Reck | 5913587 | 2010-11-02 12:39:01 -0700 | [diff] [blame] | 1950 | MUST_USE_RESULT MaybeObject* BinaryOp_Patch(Arguments args) { |
Leon Clarke | ac95265 | 2010-07-15 11:15:24 +0100 | [diff] [blame] | 1951 | ASSERT(args.length() == 5); |
Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [diff] [blame] | 1952 | |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 1953 | HandleScope scope; |
Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [diff] [blame] | 1954 | Handle<Object> left = args.at<Object>(0); |
| 1955 | Handle<Object> right = args.at<Object>(1); |
Leon Clarke | ac95265 | 2010-07-15 11:15:24 +0100 | [diff] [blame] | 1956 | int key = Smi::cast(args[2])->value(); |
| 1957 | Token::Value op = static_cast<Token::Value>(Smi::cast(args[3])->value()); |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 1958 | BinaryOpIC::TypeInfo previous_type = |
Leon Clarke | ac95265 | 2010-07-15 11:15:24 +0100 | [diff] [blame] | 1959 | static_cast<BinaryOpIC::TypeInfo>(Smi::cast(args[4])->value()); |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 1960 | |
| 1961 | BinaryOpIC::TypeInfo type = BinaryOpIC::GetTypeInfo(*left, *right); |
| 1962 | Handle<Code> code = GetBinaryOpStub(key, type); |
| 1963 | if (!code.is_null()) { |
| 1964 | BinaryOpIC ic; |
| 1965 | ic.patch(*code); |
| 1966 | if (FLAG_trace_ic) { |
| 1967 | PrintF("[BinaryOpIC (%s->%s)#%s]\n", |
| 1968 | BinaryOpIC::GetName(previous_type), |
| 1969 | BinaryOpIC::GetName(type), |
| 1970 | Token::Name(op)); |
Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [diff] [blame] | 1971 | } |
| 1972 | } |
| 1973 | |
Leon Clarke | ac95265 | 2010-07-15 11:15:24 +0100 | [diff] [blame] | 1974 | Handle<JSBuiltinsObject> builtins = Top::builtins(); |
Leon Clarke | ac95265 | 2010-07-15 11:15:24 +0100 | [diff] [blame] | 1975 | Object* builtin = NULL; // Initialization calms down the compiler. |
Leon Clarke | ac95265 | 2010-07-15 11:15:24 +0100 | [diff] [blame] | 1976 | switch (op) { |
| 1977 | case Token::ADD: |
| 1978 | builtin = builtins->javascript_builtin(Builtins::ADD); |
| 1979 | break; |
| 1980 | case Token::SUB: |
| 1981 | builtin = builtins->javascript_builtin(Builtins::SUB); |
| 1982 | break; |
| 1983 | case Token::MUL: |
| 1984 | builtin = builtins->javascript_builtin(Builtins::MUL); |
| 1985 | break; |
| 1986 | case Token::DIV: |
| 1987 | builtin = builtins->javascript_builtin(Builtins::DIV); |
| 1988 | break; |
| 1989 | case Token::MOD: |
| 1990 | builtin = builtins->javascript_builtin(Builtins::MOD); |
| 1991 | break; |
| 1992 | case Token::BIT_AND: |
| 1993 | builtin = builtins->javascript_builtin(Builtins::BIT_AND); |
| 1994 | break; |
| 1995 | case Token::BIT_OR: |
| 1996 | builtin = builtins->javascript_builtin(Builtins::BIT_OR); |
| 1997 | break; |
| 1998 | case Token::BIT_XOR: |
| 1999 | builtin = builtins->javascript_builtin(Builtins::BIT_XOR); |
| 2000 | break; |
| 2001 | case Token::SHR: |
| 2002 | builtin = builtins->javascript_builtin(Builtins::SHR); |
| 2003 | break; |
| 2004 | case Token::SAR: |
| 2005 | builtin = builtins->javascript_builtin(Builtins::SAR); |
| 2006 | break; |
| 2007 | case Token::SHL: |
| 2008 | builtin = builtins->javascript_builtin(Builtins::SHL); |
| 2009 | break; |
| 2010 | default: |
| 2011 | UNREACHABLE(); |
| 2012 | } |
| 2013 | |
| 2014 | Handle<JSFunction> builtin_function(JSFunction::cast(builtin)); |
| 2015 | |
| 2016 | bool caught_exception; |
| 2017 | Object** builtin_args[] = { right.location() }; |
| 2018 | Handle<Object> result = Execution::Call(builtin_function, |
| 2019 | left, |
| 2020 | ARRAY_SIZE(builtin_args), |
| 2021 | builtin_args, |
| 2022 | &caught_exception); |
| 2023 | if (caught_exception) { |
| 2024 | return Failure::Exception(); |
| 2025 | } |
Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [diff] [blame] | 2026 | return *result; |
| 2027 | } |
| 2028 | |
| 2029 | |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 2030 | void TRBinaryOpIC::patch(Code* code) { |
| 2031 | set_target(code); |
| 2032 | } |
| 2033 | |
| 2034 | |
| 2035 | const char* TRBinaryOpIC::GetName(TypeInfo type_info) { |
| 2036 | switch (type_info) { |
| 2037 | case UNINITIALIZED: return "Uninitialized"; |
| 2038 | case SMI: return "SMI"; |
| 2039 | case INT32: return "Int32s"; |
| 2040 | case HEAP_NUMBER: return "HeapNumbers"; |
| 2041 | case STRING: return "Strings"; |
| 2042 | case GENERIC: return "Generic"; |
| 2043 | default: return "Invalid"; |
| 2044 | } |
| 2045 | } |
| 2046 | |
| 2047 | |
| 2048 | TRBinaryOpIC::State TRBinaryOpIC::ToState(TypeInfo type_info) { |
| 2049 | switch (type_info) { |
| 2050 | case UNINITIALIZED: |
| 2051 | return ::v8::internal::UNINITIALIZED; |
| 2052 | case SMI: |
| 2053 | case INT32: |
| 2054 | case HEAP_NUMBER: |
| 2055 | case STRING: |
| 2056 | return MONOMORPHIC; |
| 2057 | case GENERIC: |
| 2058 | return MEGAMORPHIC; |
| 2059 | } |
| 2060 | UNREACHABLE(); |
| 2061 | return ::v8::internal::UNINITIALIZED; |
| 2062 | } |
| 2063 | |
| 2064 | |
| 2065 | TRBinaryOpIC::TypeInfo TRBinaryOpIC::JoinTypes(TRBinaryOpIC::TypeInfo x, |
| 2066 | TRBinaryOpIC::TypeInfo y) { |
| 2067 | if (x == UNINITIALIZED) return y; |
| 2068 | if (y == UNINITIALIZED) return x; |
| 2069 | if (x == STRING && y == STRING) return STRING; |
| 2070 | if (x == STRING || y == STRING) return GENERIC; |
| 2071 | if (x >= y) return x; |
| 2072 | return y; |
| 2073 | } |
| 2074 | |
| 2075 | TRBinaryOpIC::TypeInfo TRBinaryOpIC::GetTypeInfo(Handle<Object> left, |
| 2076 | Handle<Object> right) { |
| 2077 | ::v8::internal::TypeInfo left_type = |
| 2078 | ::v8::internal::TypeInfo::TypeFromValue(left); |
| 2079 | ::v8::internal::TypeInfo right_type = |
| 2080 | ::v8::internal::TypeInfo::TypeFromValue(right); |
| 2081 | |
| 2082 | if (left_type.IsSmi() && right_type.IsSmi()) { |
| 2083 | return SMI; |
| 2084 | } |
| 2085 | |
| 2086 | if (left_type.IsInteger32() && right_type.IsInteger32()) { |
Steve Block | 1e0659c | 2011-05-24 12:43:12 +0100 | [diff] [blame^] | 2087 | // Platforms with 32-bit Smis have no distinct INT32 type. |
| 2088 | if (kSmiValueSize == 32) return SMI; |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 2089 | return INT32; |
| 2090 | } |
| 2091 | |
| 2092 | if (left_type.IsNumber() && right_type.IsNumber()) { |
| 2093 | return HEAP_NUMBER; |
| 2094 | } |
| 2095 | |
| 2096 | if (left_type.IsString() || right_type.IsString()) { |
| 2097 | // Patching for fast string ADD makes sense even if only one of the |
| 2098 | // arguments is a string. |
| 2099 | return STRING; |
| 2100 | } |
| 2101 | |
| 2102 | return GENERIC; |
| 2103 | } |
| 2104 | |
| 2105 | |
| 2106 | // defined in code-stubs-<arch>.cc |
| 2107 | // Only needed to remove dependency of ic.cc on code-stubs-<arch>.h. |
| 2108 | Handle<Code> GetTypeRecordingBinaryOpStub(int key, |
| 2109 | TRBinaryOpIC::TypeInfo type_info, |
| 2110 | TRBinaryOpIC::TypeInfo result_type); |
| 2111 | |
| 2112 | |
| 2113 | MaybeObject* TypeRecordingBinaryOp_Patch(Arguments args) { |
| 2114 | ASSERT(args.length() == 5); |
| 2115 | |
| 2116 | HandleScope scope; |
| 2117 | Handle<Object> left = args.at<Object>(0); |
| 2118 | Handle<Object> right = args.at<Object>(1); |
| 2119 | int key = Smi::cast(args[2])->value(); |
| 2120 | Token::Value op = static_cast<Token::Value>(Smi::cast(args[3])->value()); |
| 2121 | TRBinaryOpIC::TypeInfo previous_type = |
| 2122 | static_cast<TRBinaryOpIC::TypeInfo>(Smi::cast(args[4])->value()); |
| 2123 | |
| 2124 | TRBinaryOpIC::TypeInfo type = TRBinaryOpIC::GetTypeInfo(left, right); |
| 2125 | type = TRBinaryOpIC::JoinTypes(type, previous_type); |
| 2126 | TRBinaryOpIC::TypeInfo result_type = TRBinaryOpIC::UNINITIALIZED; |
| 2127 | if (type == TRBinaryOpIC::STRING && op != Token::ADD) { |
| 2128 | type = TRBinaryOpIC::GENERIC; |
| 2129 | } |
| 2130 | if (type == TRBinaryOpIC::SMI && |
| 2131 | previous_type == TRBinaryOpIC::SMI) { |
Steve Block | 1e0659c | 2011-05-24 12:43:12 +0100 | [diff] [blame^] | 2132 | if (op == Token::DIV || op == Token::MUL || kSmiValueSize == 32) { |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 2133 | // Arithmetic on two Smi inputs has yielded a heap number. |
| 2134 | // That is the only way to get here from the Smi stub. |
Steve Block | 1e0659c | 2011-05-24 12:43:12 +0100 | [diff] [blame^] | 2135 | // With 32-bit Smis, all overflows give heap numbers, but with |
| 2136 | // 31-bit Smis, most operations overflow to int32 results. |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 2137 | result_type = TRBinaryOpIC::HEAP_NUMBER; |
| 2138 | } else { |
| 2139 | // Other operations on SMIs that overflow yield int32s. |
| 2140 | result_type = TRBinaryOpIC::INT32; |
| 2141 | } |
| 2142 | } |
| 2143 | if (type == TRBinaryOpIC::INT32 && |
| 2144 | previous_type == TRBinaryOpIC::INT32) { |
| 2145 | // We must be here because an operation on two INT32 types overflowed. |
| 2146 | result_type = TRBinaryOpIC::HEAP_NUMBER; |
| 2147 | } |
| 2148 | |
| 2149 | Handle<Code> code = GetTypeRecordingBinaryOpStub(key, type, result_type); |
| 2150 | if (!code.is_null()) { |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 2151 | if (FLAG_trace_ic) { |
| 2152 | PrintF("[TypeRecordingBinaryOpIC (%s->(%s->%s))#%s]\n", |
| 2153 | TRBinaryOpIC::GetName(previous_type), |
| 2154 | TRBinaryOpIC::GetName(type), |
| 2155 | TRBinaryOpIC::GetName(result_type), |
| 2156 | Token::Name(op)); |
| 2157 | } |
Steve Block | 1e0659c | 2011-05-24 12:43:12 +0100 | [diff] [blame^] | 2158 | TRBinaryOpIC ic; |
| 2159 | ic.patch(*code); |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 2160 | |
| 2161 | // Activate inlined smi code. |
| 2162 | if (previous_type == TRBinaryOpIC::UNINITIALIZED) { |
| 2163 | PatchInlinedSmiCode(ic.address()); |
| 2164 | } |
| 2165 | } |
| 2166 | |
| 2167 | Handle<JSBuiltinsObject> builtins = Top::builtins(); |
| 2168 | Object* builtin = NULL; // Initialization calms down the compiler. |
| 2169 | switch (op) { |
| 2170 | case Token::ADD: |
| 2171 | builtin = builtins->javascript_builtin(Builtins::ADD); |
| 2172 | break; |
| 2173 | case Token::SUB: |
| 2174 | builtin = builtins->javascript_builtin(Builtins::SUB); |
| 2175 | break; |
| 2176 | case Token::MUL: |
| 2177 | builtin = builtins->javascript_builtin(Builtins::MUL); |
| 2178 | break; |
| 2179 | case Token::DIV: |
| 2180 | builtin = builtins->javascript_builtin(Builtins::DIV); |
| 2181 | break; |
| 2182 | case Token::MOD: |
| 2183 | builtin = builtins->javascript_builtin(Builtins::MOD); |
| 2184 | break; |
| 2185 | case Token::BIT_AND: |
| 2186 | builtin = builtins->javascript_builtin(Builtins::BIT_AND); |
| 2187 | break; |
| 2188 | case Token::BIT_OR: |
| 2189 | builtin = builtins->javascript_builtin(Builtins::BIT_OR); |
| 2190 | break; |
| 2191 | case Token::BIT_XOR: |
| 2192 | builtin = builtins->javascript_builtin(Builtins::BIT_XOR); |
| 2193 | break; |
| 2194 | case Token::SHR: |
| 2195 | builtin = builtins->javascript_builtin(Builtins::SHR); |
| 2196 | break; |
| 2197 | case Token::SAR: |
| 2198 | builtin = builtins->javascript_builtin(Builtins::SAR); |
| 2199 | break; |
| 2200 | case Token::SHL: |
| 2201 | builtin = builtins->javascript_builtin(Builtins::SHL); |
| 2202 | break; |
| 2203 | default: |
| 2204 | UNREACHABLE(); |
| 2205 | } |
| 2206 | |
| 2207 | Handle<JSFunction> builtin_function(JSFunction::cast(builtin)); |
| 2208 | |
| 2209 | bool caught_exception; |
| 2210 | Object** builtin_args[] = { right.location() }; |
| 2211 | Handle<Object> result = Execution::Call(builtin_function, |
| 2212 | left, |
| 2213 | ARRAY_SIZE(builtin_args), |
| 2214 | builtin_args, |
| 2215 | &caught_exception); |
| 2216 | if (caught_exception) { |
| 2217 | return Failure::Exception(); |
| 2218 | } |
| 2219 | return *result; |
| 2220 | } |
| 2221 | |
| 2222 | |
| 2223 | Handle<Code> CompareIC::GetUninitialized(Token::Value op) { |
| 2224 | ICCompareStub stub(op, UNINITIALIZED); |
| 2225 | return stub.GetCode(); |
| 2226 | } |
| 2227 | |
| 2228 | |
| 2229 | CompareIC::State CompareIC::ComputeState(Code* target) { |
| 2230 | int key = target->major_key(); |
| 2231 | if (key == CodeStub::Compare) return GENERIC; |
| 2232 | ASSERT(key == CodeStub::CompareIC); |
| 2233 | return static_cast<State>(target->compare_state()); |
| 2234 | } |
| 2235 | |
| 2236 | |
| 2237 | const char* CompareIC::GetStateName(State state) { |
| 2238 | switch (state) { |
| 2239 | case UNINITIALIZED: return "UNINITIALIZED"; |
| 2240 | case SMIS: return "SMIS"; |
| 2241 | case HEAP_NUMBERS: return "HEAP_NUMBERS"; |
| 2242 | case OBJECTS: return "OBJECTS"; |
| 2243 | case GENERIC: return "GENERIC"; |
| 2244 | default: |
| 2245 | UNREACHABLE(); |
| 2246 | return NULL; |
| 2247 | } |
| 2248 | } |
| 2249 | |
| 2250 | |
| 2251 | CompareIC::State CompareIC::TargetState(State state, |
| 2252 | bool has_inlined_smi_code, |
| 2253 | Handle<Object> x, |
| 2254 | Handle<Object> y) { |
| 2255 | if (!has_inlined_smi_code && state != UNINITIALIZED) return GENERIC; |
| 2256 | if (state == UNINITIALIZED && x->IsSmi() && y->IsSmi()) return SMIS; |
| 2257 | if ((state == UNINITIALIZED || (state == SMIS && has_inlined_smi_code)) && |
| 2258 | x->IsNumber() && y->IsNumber()) return HEAP_NUMBERS; |
| 2259 | if (op_ != Token::EQ && op_ != Token::EQ_STRICT) return GENERIC; |
| 2260 | if (state == UNINITIALIZED && |
| 2261 | x->IsJSObject() && y->IsJSObject()) return OBJECTS; |
| 2262 | return GENERIC; |
| 2263 | } |
| 2264 | |
| 2265 | |
| 2266 | // Used from ic_<arch>.cc. |
| 2267 | Code* CompareIC_Miss(Arguments args) { |
| 2268 | NoHandleAllocation na; |
| 2269 | ASSERT(args.length() == 3); |
| 2270 | CompareIC ic(static_cast<Token::Value>(Smi::cast(args[2])->value())); |
| 2271 | ic.UpdateCaches(args.at<Object>(0), args.at<Object>(1)); |
| 2272 | return ic.target(); |
| 2273 | } |
| 2274 | |
| 2275 | |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 2276 | static Address IC_utilities[] = { |
| 2277 | #define ADDR(name) FUNCTION_ADDR(name), |
| 2278 | IC_UTIL_LIST(ADDR) |
| 2279 | NULL |
| 2280 | #undef ADDR |
| 2281 | }; |
| 2282 | |
| 2283 | |
| 2284 | Address IC::AddressFromUtilityId(IC::UtilityId id) { |
| 2285 | return IC_utilities[id]; |
| 2286 | } |
| 2287 | |
| 2288 | |
| 2289 | } } // namespace v8::internal |