ager@chromium.org | ea91cc5 | 2011-05-23 06:06:11 +0000 | [diff] [blame] | 1 | // Copyright 2011 the V8 project authors. All rights reserved. |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 2 | // Redistribution and use in source and binary forms, with or without |
| 3 | // modification, are permitted provided that the following conditions are |
| 4 | // met: |
| 5 | // |
| 6 | // * Redistributions of source code must retain the above copyright |
| 7 | // notice, this list of conditions and the following disclaimer. |
| 8 | // * Redistributions in binary form must reproduce the above |
| 9 | // copyright notice, this list of conditions and the following |
| 10 | // disclaimer in the documentation and/or other materials provided |
| 11 | // with the distribution. |
| 12 | // * Neither the name of Google Inc. nor the names of its |
| 13 | // contributors may be used to endorse or promote products derived |
| 14 | // from this software without specific prior written permission. |
| 15 | // |
| 16 | // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
| 17 | // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
| 18 | // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
| 19 | // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT |
| 20 | // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
| 21 | // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
| 22 | // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
| 23 | // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
| 24 | // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| 25 | // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
| 26 | // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| 27 | |
| 28 | #include "v8.h" |
| 29 | |
| 30 | #include "accessors.h" |
| 31 | #include "api.h" |
| 32 | #include "arguments.h" |
kasperl@chromium.org | a555126 | 2010-12-07 12:49:48 +0000 | [diff] [blame] | 33 | #include "codegen.h" |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 34 | #include "execution.h" |
| 35 | #include "ic-inl.h" |
| 36 | #include "runtime.h" |
| 37 | #include "stub-cache.h" |
| 38 | |
kasperl@chromium.org | 71affb5 | 2009-05-26 05:44:31 +0000 | [diff] [blame] | 39 | namespace v8 { |
| 40 | namespace internal { |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 41 | |
| 42 | #ifdef DEBUG |
kasperl@chromium.org | ba86cd6 | 2009-05-27 08:46:40 +0000 | [diff] [blame] | 43 | static char TransitionMarkFromState(IC::State state) { |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 44 | switch (state) { |
| 45 | case UNINITIALIZED: return '0'; |
ager@chromium.org | 5ec4892 | 2009-05-05 07:25:34 +0000 | [diff] [blame] | 46 | case PREMONOMORPHIC: return 'P'; |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 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, |
ager@chromium.org | 2cc82ae | 2010-06-14 07:35:38 +0000 | [diff] [blame] | 62 | Handle<Object> name, |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 63 | State old_state, |
kasperl@chromium.org | 71affb5 | 2009-05-26 05:44:31 +0000 | [diff] [blame] | 64 | Code* new_target, |
| 65 | const char* extra_info) { |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 66 | if (FLAG_trace_ic) { |
ager@chromium.org | ce5e87b | 2010-03-10 10:24:18 +0000 | [diff] [blame] | 67 | State new_state = StateFrom(new_target, |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 68 | HEAP->undefined_value(), |
| 69 | HEAP->undefined_value()); |
ager@chromium.org | ea91cc5 | 2011-05-23 06:06:11 +0000 | [diff] [blame] | 70 | PrintF("[%s in ", type); |
| 71 | StackFrameIterator it; |
| 72 | while (it.frame()->fp() != this->fp()) it.Advance(); |
| 73 | StackFrame* raw_frame = it.frame(); |
| 74 | if (raw_frame->is_internal()) { |
| 75 | Isolate* isolate = new_target->GetIsolate(); |
| 76 | Code* apply_builtin = isolate->builtins()->builtin( |
| 77 | Builtins::kFunctionApply); |
| 78 | if (raw_frame->unchecked_code() == apply_builtin) { |
| 79 | PrintF("apply from "); |
| 80 | it.Advance(); |
| 81 | raw_frame = it.frame(); |
| 82 | } |
| 83 | } |
| 84 | if (raw_frame->is_java_script()) { |
| 85 | JavaScriptFrame* frame = JavaScriptFrame::cast(raw_frame); |
| 86 | Code* js_code = frame->unchecked_code(); |
| 87 | // Find the function on the stack and both the active code for the |
| 88 | // function and the original code. |
| 89 | JSFunction* function = JSFunction::cast(frame->function()); |
| 90 | function->PrintName(); |
vegorov@chromium.org | 7943d46 | 2011-08-01 11:41:52 +0000 | [diff] [blame] | 91 | int code_offset = |
| 92 | static_cast<int>(address() - js_code->instruction_start()); |
ager@chromium.org | ea91cc5 | 2011-05-23 06:06:11 +0000 | [diff] [blame] | 93 | PrintF("+%d", code_offset); |
| 94 | } else { |
| 95 | PrintF("<unknown>"); |
| 96 | } |
| 97 | PrintF(" (%c->%c)%s", |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 98 | TransitionMarkFromState(old_state), |
kasperl@chromium.org | 71affb5 | 2009-05-26 05:44:31 +0000 | [diff] [blame] | 99 | TransitionMarkFromState(new_state), |
| 100 | extra_info); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 101 | name->Print(); |
| 102 | PrintF("]\n"); |
| 103 | } |
| 104 | } |
| 105 | #endif |
| 106 | |
| 107 | |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 108 | IC::IC(FrameDepth depth, Isolate* isolate) : isolate_(isolate) { |
| 109 | ASSERT(isolate == Isolate::Current()); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 110 | // To improve the performance of the (much used) IC code, we unfold |
| 111 | // a few levels of the stack frame iteration code. This yields a |
| 112 | // ~35% speedup when running DeltaBlue with the '--nouse-ic' flag. |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 113 | const Address entry = |
| 114 | Isolate::c_entry_fp(isolate->thread_local_top()); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 115 | Address* pc_address = |
| 116 | reinterpret_cast<Address*>(entry + ExitFrameConstants::kCallerPCOffset); |
| 117 | Address fp = Memory::Address_at(entry + ExitFrameConstants::kCallerFPOffset); |
| 118 | // If there's another JavaScript frame on the stack, we need to look |
| 119 | // one frame further down the stack to find the frame pointer and |
| 120 | // the return address stack slot. |
| 121 | if (depth == EXTRA_CALL_FRAME) { |
| 122 | const int kCallerPCOffset = StandardFrameConstants::kCallerPCOffset; |
| 123 | pc_address = reinterpret_cast<Address*>(fp + kCallerPCOffset); |
| 124 | fp = Memory::Address_at(fp + StandardFrameConstants::kCallerFPOffset); |
| 125 | } |
| 126 | #ifdef DEBUG |
| 127 | StackFrameIterator it; |
| 128 | for (int i = 0; i < depth + 1; i++) it.Advance(); |
| 129 | StackFrame* frame = it.frame(); |
| 130 | ASSERT(fp == frame->fp() && pc_address == frame->pc_address()); |
| 131 | #endif |
| 132 | fp_ = fp; |
| 133 | pc_address_ = pc_address; |
| 134 | } |
| 135 | |
| 136 | |
ager@chromium.org | 65dad4b | 2009-04-23 08:48:43 +0000 | [diff] [blame] | 137 | #ifdef ENABLE_DEBUGGER_SUPPORT |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 138 | Address IC::OriginalCodeAddress() { |
| 139 | HandleScope scope; |
| 140 | // Compute the JavaScript frame for the frame pointer of this IC |
| 141 | // structure. We need this to be able to find the function |
| 142 | // corresponding to the frame. |
| 143 | StackFrameIterator it; |
| 144 | while (it.frame()->fp() != this->fp()) it.Advance(); |
| 145 | JavaScriptFrame* frame = JavaScriptFrame::cast(it.frame()); |
| 146 | // Find the function on the stack and both the active code for the |
| 147 | // function and the original code. |
| 148 | JSFunction* function = JSFunction::cast(frame->function()); |
| 149 | Handle<SharedFunctionInfo> shared(function->shared()); |
| 150 | Code* code = shared->code(); |
| 151 | ASSERT(Debug::HasDebugInfo(shared)); |
| 152 | Code* original_code = Debug::GetDebugInfo(shared)->original_code(); |
| 153 | ASSERT(original_code->IsCode()); |
| 154 | // Get the address of the call site in the active code. This is the |
| 155 | // place where the call to DebugBreakXXX is and where the IC |
| 156 | // normally would be. |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 157 | Address addr = pc() - Assembler::kCallTargetAddressOffset; |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 158 | // Return the address in the original code. This is the place where |
ager@chromium.org | 3291210 | 2009-01-16 10:38:43 +0000 | [diff] [blame] | 159 | // the call which has been overwritten by the DebugBreakXXX resides |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 160 | // and the place where the inline cache system should look. |
ager@chromium.org | c4c9272 | 2009-11-18 14:12:51 +0000 | [diff] [blame] | 161 | intptr_t delta = |
| 162 | original_code->instruction_start() - code->instruction_start(); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 163 | return addr + delta; |
| 164 | } |
ager@chromium.org | 65dad4b | 2009-04-23 08:48:43 +0000 | [diff] [blame] | 165 | #endif |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 166 | |
kmillikin@chromium.org | 69ea396 | 2010-07-05 11:01:40 +0000 | [diff] [blame] | 167 | |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 168 | static bool HasNormalObjectsInPrototypeChain(Isolate* isolate, |
| 169 | LookupResult* lookup, |
kmillikin@chromium.org | 69ea396 | 2010-07-05 11:01:40 +0000 | [diff] [blame] | 170 | Object* receiver) { |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 171 | Object* end = lookup->IsProperty() |
| 172 | ? lookup->holder() : isolate->heap()->null_value(); |
kmillikin@chromium.org | 69ea396 | 2010-07-05 11:01:40 +0000 | [diff] [blame] | 173 | for (Object* current = receiver; |
| 174 | current != end; |
| 175 | current = current->GetPrototype()) { |
| 176 | if (current->IsJSObject() && |
| 177 | !JSObject::cast(current)->HasFastProperties() && |
| 178 | !current->IsJSGlobalProxy() && |
| 179 | !current->IsJSGlobalObject()) { |
| 180 | return true; |
| 181 | } |
| 182 | } |
| 183 | |
| 184 | return false; |
| 185 | } |
| 186 | |
| 187 | |
erik.corry@gmail.com | 0511e24 | 2011-01-19 11:11:08 +0000 | [diff] [blame] | 188 | static bool TryRemoveInvalidPrototypeDependentStub(Code* target, |
| 189 | Object* receiver, |
| 190 | Object* name) { |
kmillikin@chromium.org | 69ea396 | 2010-07-05 11:01:40 +0000 | [diff] [blame] | 191 | InlineCacheHolderFlag cache_holder = |
| 192 | Code::ExtractCacheHolderFromFlags(target->flags()); |
| 193 | |
kmillikin@chromium.org | 69ea396 | 2010-07-05 11:01:40 +0000 | [diff] [blame] | 194 | if (cache_holder == OWN_MAP && !receiver->IsJSObject()) { |
| 195 | // The stub was generated for JSObject but called for non-JSObject. |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 196 | // IC::GetCodeCacheHolder is not applicable. |
erik.corry@gmail.com | 0511e24 | 2011-01-19 11:11:08 +0000 | [diff] [blame] | 197 | return false; |
kmillikin@chromium.org | 69ea396 | 2010-07-05 11:01:40 +0000 | [diff] [blame] | 198 | } else if (cache_holder == PROTOTYPE_MAP && |
| 199 | receiver->GetPrototype()->IsNull()) { |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 200 | // IC::GetCodeCacheHolder is not applicable. |
erik.corry@gmail.com | 0511e24 | 2011-01-19 11:11:08 +0000 | [diff] [blame] | 201 | return false; |
kmillikin@chromium.org | 69ea396 | 2010-07-05 11:01:40 +0000 | [diff] [blame] | 202 | } |
ricow@chromium.org | 65fae84 | 2010-08-25 15:26:24 +0000 | [diff] [blame] | 203 | Map* map = IC::GetCodeCacheHolder(receiver, cache_holder)->map(); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 204 | |
| 205 | // Decide whether the inline cache failed because of changes to the |
| 206 | // receiver itself or changes to one of its prototypes. |
| 207 | // |
| 208 | // If there are changes to the receiver itself, the map of the |
| 209 | // receiver will have changed and the current target will not be in |
| 210 | // the receiver map's code cache. Therefore, if the current target |
| 211 | // is in the receiver map's code cache, the inline cache failed due |
| 212 | // to prototype check failure. |
sgjesse@chromium.org | 99a37fa | 2010-03-11 09:23:46 +0000 | [diff] [blame] | 213 | int index = map->IndexInCodeCache(name, target); |
kasperl@chromium.org | b912362 | 2008-09-17 14:05:56 +0000 | [diff] [blame] | 214 | if (index >= 0) { |
ager@chromium.org | ce5e87b | 2010-03-10 10:24:18 +0000 | [diff] [blame] | 215 | map->RemoveFromCodeCache(String::cast(name), target, index); |
erik.corry@gmail.com | 0511e24 | 2011-01-19 11:11:08 +0000 | [diff] [blame] | 216 | return true; |
| 217 | } |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 218 | |
erik.corry@gmail.com | 0511e24 | 2011-01-19 11:11:08 +0000 | [diff] [blame] | 219 | return false; |
| 220 | } |
| 221 | |
| 222 | |
| 223 | IC::State IC::StateFrom(Code* target, Object* receiver, Object* name) { |
| 224 | IC::State state = target->ic_state(); |
| 225 | |
| 226 | if (state != MONOMORPHIC || !name->IsString()) return state; |
| 227 | if (receiver->IsUndefined() || receiver->IsNull()) return state; |
| 228 | |
| 229 | // For keyed load/store/call, the most likely cause of cache failure is |
| 230 | // that the key has changed. We do not distinguish between |
| 231 | // prototype and non-prototype failures for keyed access. |
| 232 | Code::Kind kind = target->kind(); |
| 233 | if (kind == Code::KEYED_LOAD_IC || |
| 234 | kind == Code::KEYED_STORE_IC || |
| 235 | kind == Code::KEYED_CALL_IC) { |
| 236 | return MONOMORPHIC; |
| 237 | } |
| 238 | |
| 239 | // Remove the target from the code cache if it became invalid |
| 240 | // because of changes in the prototype chain to avoid hitting it |
| 241 | // again. |
| 242 | // Call stubs handle this later to allow extra IC state |
| 243 | // transitions. |
| 244 | if (kind != Code::CALL_IC && |
| 245 | TryRemoveInvalidPrototypeDependentStub(target, receiver, name)) { |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 246 | return MONOMORPHIC_PROTOTYPE_FAILURE; |
| 247 | } |
kasperl@chromium.org | b912362 | 2008-09-17 14:05:56 +0000 | [diff] [blame] | 248 | |
| 249 | // The builtins object is special. It only changes when JavaScript |
| 250 | // builtins are loaded lazily. It is important to keep inline |
| 251 | // caches for the builtins object monomorphic. Therefore, if we get |
| 252 | // an inline cache miss for the builtins object after lazily loading |
ager@chromium.org | 236ad96 | 2008-09-25 09:45:57 +0000 | [diff] [blame] | 253 | // JavaScript builtins, we return uninitialized as the state to |
| 254 | // force the inline cache back to monomorphic state. |
kasperl@chromium.org | b912362 | 2008-09-17 14:05:56 +0000 | [diff] [blame] | 255 | if (receiver->IsJSBuiltinsObject()) { |
kasperl@chromium.org | b912362 | 2008-09-17 14:05:56 +0000 | [diff] [blame] | 256 | return UNINITIALIZED; |
| 257 | } |
| 258 | |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 259 | return MONOMORPHIC; |
| 260 | } |
| 261 | |
| 262 | |
ager@chromium.org | 236ad96 | 2008-09-25 09:45:57 +0000 | [diff] [blame] | 263 | RelocInfo::Mode IC::ComputeMode() { |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 264 | Address addr = address(); |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 265 | Code* code = Code::cast(isolate()->heap()->FindCodeObject(addr)); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 266 | for (RelocIterator it(code, RelocInfo::kCodeTargetMask); |
| 267 | !it.done(); it.next()) { |
| 268 | RelocInfo* info = it.rinfo(); |
| 269 | if (info->pc() == addr) return info->rmode(); |
| 270 | } |
| 271 | UNREACHABLE(); |
ager@chromium.org | 236ad96 | 2008-09-25 09:45:57 +0000 | [diff] [blame] | 272 | return RelocInfo::NONE; |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 273 | } |
| 274 | |
| 275 | |
| 276 | Failure* IC::TypeError(const char* type, |
| 277 | Handle<Object> object, |
lrn@chromium.org | 1af7e1b | 2010-06-07 11:12:01 +0000 | [diff] [blame] | 278 | Handle<Object> key) { |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 279 | HandleScope scope(isolate()); |
lrn@chromium.org | 1af7e1b | 2010-06-07 11:12:01 +0000 | [diff] [blame] | 280 | Handle<Object> args[2] = { key, object }; |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 281 | Handle<Object> error = isolate()->factory()->NewTypeError( |
| 282 | type, HandleVector(args, 2)); |
| 283 | return isolate()->Throw(*error); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 284 | } |
| 285 | |
| 286 | |
| 287 | Failure* IC::ReferenceError(const char* type, Handle<String> name) { |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 288 | HandleScope scope(isolate()); |
| 289 | Handle<Object> error = isolate()->factory()->NewReferenceError( |
| 290 | type, HandleVector(&name, 1)); |
| 291 | return isolate()->Throw(*error); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 292 | } |
| 293 | |
| 294 | |
| 295 | void IC::Clear(Address address) { |
| 296 | Code* target = GetTargetAtAddress(address); |
| 297 | |
| 298 | // Don't clear debug break inline cache as it will remove the break point. |
kasper.lund | 7276f14 | 2008-07-30 08:49:36 +0000 | [diff] [blame] | 299 | if (target->ic_state() == DEBUG_BREAK) return; |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 300 | |
| 301 | switch (target->kind()) { |
| 302 | case Code::LOAD_IC: return LoadIC::Clear(address, target); |
danno@chromium.org | 4d3fe4e | 2011-03-10 10:14:28 +0000 | [diff] [blame] | 303 | case Code::KEYED_LOAD_IC: |
danno@chromium.org | 4d3fe4e | 2011-03-10 10:14:28 +0000 | [diff] [blame] | 304 | return KeyedLoadIC::Clear(address, target); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 305 | case Code::STORE_IC: return StoreIC::Clear(address, target); |
danno@chromium.org | 4d3fe4e | 2011-03-10 10:14:28 +0000 | [diff] [blame] | 306 | case Code::KEYED_STORE_IC: |
danno@chromium.org | 4d3fe4e | 2011-03-10 10:14:28 +0000 | [diff] [blame] | 307 | return KeyedStoreIC::Clear(address, target); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 308 | case Code::CALL_IC: return CallIC::Clear(address, target); |
lrn@chromium.org | 1af7e1b | 2010-06-07 11:12:01 +0000 | [diff] [blame] | 309 | case Code::KEYED_CALL_IC: return KeyedCallIC::Clear(address, target); |
danno@chromium.org | 40cb878 | 2011-05-25 07:58:50 +0000 | [diff] [blame] | 310 | case Code::UNARY_OP_IC: |
| 311 | case Code::BINARY_OP_IC: |
kasperl@chromium.org | a555126 | 2010-12-07 12:49:48 +0000 | [diff] [blame] | 312 | case Code::COMPARE_IC: |
ricow@chromium.org | 9fa0967 | 2011-07-25 11:05:35 +0000 | [diff] [blame] | 313 | case Code::TO_BOOLEAN_IC: |
kasperl@chromium.org | a555126 | 2010-12-07 12:49:48 +0000 | [diff] [blame] | 314 | // Clearing these is tricky and does not |
| 315 | // make any performance difference. |
| 316 | return; |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 317 | default: UNREACHABLE(); |
| 318 | } |
| 319 | } |
| 320 | |
| 321 | |
lrn@chromium.org | 1af7e1b | 2010-06-07 11:12:01 +0000 | [diff] [blame] | 322 | void CallICBase::Clear(Address address, Code* target) { |
danno@chromium.org | 40cb878 | 2011-05-25 07:58:50 +0000 | [diff] [blame] | 323 | bool contextual = CallICBase::Contextual::decode(target->extra_ic_state()); |
ager@chromium.org | 3bf7b91 | 2008-11-17 09:09:45 +0000 | [diff] [blame] | 324 | State state = target->ic_state(); |
kasperl@chromium.org | 71affb5 | 2009-05-26 05:44:31 +0000 | [diff] [blame] | 325 | if (state == UNINITIALIZED) return; |
| 326 | Code* code = |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 327 | Isolate::Current()->stub_cache()->FindCallInitialize( |
| 328 | target->arguments_count(), |
| 329 | target->ic_in_loop(), |
danno@chromium.org | 40cb878 | 2011-05-25 07:58:50 +0000 | [diff] [blame] | 330 | contextual ? RelocInfo::CODE_TARGET_CONTEXT : RelocInfo::CODE_TARGET, |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 331 | target->kind()); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 332 | SetTargetAtAddress(address, code); |
| 333 | } |
| 334 | |
| 335 | |
| 336 | void KeyedLoadIC::Clear(Address address, Code* target) { |
kasper.lund | 7276f14 | 2008-07-30 08:49:36 +0000 | [diff] [blame] | 337 | if (target->ic_state() == UNINITIALIZED) return; |
christian.plesner.hansen@gmail.com | 37abdec | 2009-01-06 14:43:28 +0000 | [diff] [blame] | 338 | // Make sure to also clear the map used in inline fast cases. If we |
| 339 | // do not clear these maps, cached code can keep objects alive |
| 340 | // through the embedded maps. |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 341 | SetTargetAtAddress(address, initialize_stub()); |
| 342 | } |
| 343 | |
| 344 | |
| 345 | void LoadIC::Clear(Address address, Code* target) { |
kasper.lund | 7276f14 | 2008-07-30 08:49:36 +0000 | [diff] [blame] | 346 | if (target->ic_state() == UNINITIALIZED) return; |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 347 | SetTargetAtAddress(address, initialize_stub()); |
| 348 | } |
| 349 | |
| 350 | |
| 351 | void StoreIC::Clear(Address address, Code* target) { |
kasper.lund | 7276f14 | 2008-07-30 08:49:36 +0000 | [diff] [blame] | 352 | if (target->ic_state() == UNINITIALIZED) return; |
sgjesse@chromium.org | 496c03a | 2011-02-14 12:05:43 +0000 | [diff] [blame] | 353 | SetTargetAtAddress(address, |
ager@chromium.org | 9ee27ae | 2011-03-02 13:43:26 +0000 | [diff] [blame] | 354 | (target->extra_ic_state() == kStrictMode) |
sgjesse@chromium.org | 496c03a | 2011-02-14 12:05:43 +0000 | [diff] [blame] | 355 | ? initialize_stub_strict() |
| 356 | : initialize_stub()); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 357 | } |
| 358 | |
| 359 | |
| 360 | void KeyedStoreIC::Clear(Address address, Code* target) { |
kasper.lund | 7276f14 | 2008-07-30 08:49:36 +0000 | [diff] [blame] | 361 | if (target->ic_state() == UNINITIALIZED) return; |
ager@chromium.org | 9ee27ae | 2011-03-02 13:43:26 +0000 | [diff] [blame] | 362 | SetTargetAtAddress(address, |
| 363 | (target->extra_ic_state() == kStrictMode) |
| 364 | ? initialize_stub_strict() |
| 365 | : initialize_stub()); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 366 | } |
| 367 | |
| 368 | |
kasperl@chromium.org | 2abc450 | 2009-07-02 07:00:29 +0000 | [diff] [blame] | 369 | static bool HasInterceptorGetter(JSObject* object) { |
| 370 | return !object->GetNamedInterceptor()->getter()->IsUndefined(); |
| 371 | } |
| 372 | |
| 373 | |
| 374 | static void LookupForRead(Object* object, |
| 375 | String* name, |
| 376 | LookupResult* lookup) { |
kasperl@chromium.org | e959c18 | 2009-07-27 08:59:04 +0000 | [diff] [blame] | 377 | AssertNoAllocation no_gc; // pointers must stay valid |
kasperl@chromium.org | 2abc450 | 2009-07-02 07:00:29 +0000 | [diff] [blame] | 378 | |
kasperl@chromium.org | e959c18 | 2009-07-27 08:59:04 +0000 | [diff] [blame] | 379 | // Skip all the objects with named interceptors, but |
| 380 | // without actual getter. |
| 381 | while (true) { |
| 382 | object->Lookup(name, lookup); |
| 383 | // Besides normal conditions (property not found or it's not |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 384 | // an interceptor), bail out if lookup is not cacheable: we won't |
kasperl@chromium.org | e959c18 | 2009-07-27 08:59:04 +0000 | [diff] [blame] | 385 | // be able to IC it anyway and regular lookup should work fine. |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 386 | if (!lookup->IsFound() |
| 387 | || (lookup->type() != INTERCEPTOR) |
| 388 | || !lookup->IsCacheable()) { |
kasperl@chromium.org | e959c18 | 2009-07-27 08:59:04 +0000 | [diff] [blame] | 389 | return; |
| 390 | } |
kasperl@chromium.org | 2abc450 | 2009-07-02 07:00:29 +0000 | [diff] [blame] | 391 | |
kasperl@chromium.org | e959c18 | 2009-07-27 08:59:04 +0000 | [diff] [blame] | 392 | JSObject* holder = lookup->holder(); |
| 393 | if (HasInterceptorGetter(holder)) { |
| 394 | return; |
| 395 | } |
kasperl@chromium.org | 2abc450 | 2009-07-02 07:00:29 +0000 | [diff] [blame] | 396 | |
kasperl@chromium.org | e959c18 | 2009-07-27 08:59:04 +0000 | [diff] [blame] | 397 | holder->LocalLookupRealNamedProperty(name, lookup); |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 398 | if (lookup->IsProperty()) { |
kasperl@chromium.org | e959c18 | 2009-07-27 08:59:04 +0000 | [diff] [blame] | 399 | ASSERT(lookup->type() != INTERCEPTOR); |
| 400 | return; |
| 401 | } |
kasperl@chromium.org | 2abc450 | 2009-07-02 07:00:29 +0000 | [diff] [blame] | 402 | |
kasperl@chromium.org | e959c18 | 2009-07-27 08:59:04 +0000 | [diff] [blame] | 403 | Object* proto = holder->GetPrototype(); |
| 404 | if (proto->IsNull()) { |
| 405 | lookup->NotFound(); |
| 406 | return; |
| 407 | } |
| 408 | |
| 409 | object = proto; |
| 410 | } |
kasperl@chromium.org | 2abc450 | 2009-07-02 07:00:29 +0000 | [diff] [blame] | 411 | } |
| 412 | |
| 413 | |
lrn@chromium.org | 1af7e1b | 2010-06-07 11:12:01 +0000 | [diff] [blame] | 414 | Object* CallICBase::TryCallAsFunction(Object* object) { |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 415 | HandleScope scope(isolate()); |
| 416 | Handle<Object> target(object, isolate()); |
ager@chromium.org | 9258b6b | 2008-09-11 09:11:10 +0000 | [diff] [blame] | 417 | Handle<Object> delegate = Execution::GetFunctionDelegate(target); |
| 418 | |
| 419 | if (delegate->IsJSFunction()) { |
| 420 | // Patch the receiver and use the delegate as the function to |
| 421 | // invoke. This is used for invoking objects as if they were |
| 422 | // functions. |
| 423 | const int argc = this->target()->arguments_count(); |
| 424 | StackFrameLocator locator; |
| 425 | JavaScriptFrame* frame = locator.FindJavaScriptFrame(0); |
| 426 | int index = frame->ComputeExpressionsCount() - (argc + 1); |
| 427 | frame->SetExpression(index, *target); |
| 428 | } |
| 429 | |
| 430 | return *delegate; |
| 431 | } |
| 432 | |
whesse@chromium.org | 2c186ca | 2010-06-16 11:32:39 +0000 | [diff] [blame] | 433 | |
fschneider@chromium.org | 3a5fd78 | 2011-02-24 10:10:44 +0000 | [diff] [blame] | 434 | void CallICBase::ReceiverToObjectIfRequired(Handle<Object> callee, |
| 435 | Handle<Object> object) { |
| 436 | if (callee->IsJSFunction()) { |
| 437 | Handle<JSFunction> function = Handle<JSFunction>::cast(callee); |
| 438 | if (function->shared()->strict_mode() || function->IsBuiltin()) { |
| 439 | // Do not wrap receiver for strict mode functions or for builtins. |
| 440 | return; |
| 441 | } |
| 442 | } |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 443 | |
fschneider@chromium.org | 3a5fd78 | 2011-02-24 10:10:44 +0000 | [diff] [blame] | 444 | // And only wrap string, number or boolean. |
| 445 | if (object->IsString() || object->IsNumber() || object->IsBoolean()) { |
| 446 | // Change the receiver to the result of calling ToObject on it. |
| 447 | const int argc = this->target()->arguments_count(); |
| 448 | StackFrameLocator locator; |
| 449 | JavaScriptFrame* frame = locator.FindJavaScriptFrame(0); |
| 450 | int index = frame->ComputeExpressionsCount() - (argc + 1); |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 451 | frame->SetExpression(index, *isolate()->factory()->ToObject(object)); |
fschneider@chromium.org | 3a5fd78 | 2011-02-24 10:10:44 +0000 | [diff] [blame] | 452 | } |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 453 | } |
| 454 | |
ager@chromium.org | 9258b6b | 2008-09-11 09:11:10 +0000 | [diff] [blame] | 455 | |
lrn@chromium.org | 303ada7 | 2010-10-27 09:33:13 +0000 | [diff] [blame] | 456 | MaybeObject* CallICBase::LoadFunction(State state, |
erik.corry@gmail.com | 0511e24 | 2011-01-19 11:11:08 +0000 | [diff] [blame] | 457 | Code::ExtraICState extra_ic_state, |
lrn@chromium.org | 303ada7 | 2010-10-27 09:33:13 +0000 | [diff] [blame] | 458 | Handle<Object> object, |
| 459 | Handle<String> name) { |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 460 | // If the object is undefined or null it's illegal to try to get any |
| 461 | // of its properties; throw a TypeError in that case. |
| 462 | if (object->IsUndefined() || object->IsNull()) { |
| 463 | return TypeError("non_object_property_call", object, name); |
| 464 | } |
| 465 | |
ager@chromium.org | 9258b6b | 2008-09-11 09:11:10 +0000 | [diff] [blame] | 466 | // Check if the name is trivially convertible to an index and get |
| 467 | // the element if so. |
| 468 | uint32_t index; |
| 469 | if (name->AsArrayIndex(&index)) { |
lrn@chromium.org | 303ada7 | 2010-10-27 09:33:13 +0000 | [diff] [blame] | 470 | Object* result; |
| 471 | { MaybeObject* maybe_result = object->GetElement(index); |
| 472 | if (!maybe_result->ToObject(&result)) return maybe_result; |
| 473 | } |
| 474 | |
ager@chromium.org | 9258b6b | 2008-09-11 09:11:10 +0000 | [diff] [blame] | 475 | if (result->IsJSFunction()) return result; |
| 476 | |
| 477 | // Try to find a suitable function delegate for the object at hand. |
| 478 | result = TryCallAsFunction(result); |
| 479 | if (result->IsJSFunction()) return result; |
| 480 | |
| 481 | // Otherwise, it will fail in the lookup step. |
| 482 | } |
| 483 | |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 484 | // Lookup the property in the object. |
| 485 | LookupResult lookup; |
kasperl@chromium.org | 2abc450 | 2009-07-02 07:00:29 +0000 | [diff] [blame] | 486 | LookupForRead(*object, *name, &lookup); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 487 | |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 488 | if (!lookup.IsProperty()) { |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 489 | // If the object does not have the requested property, check which |
| 490 | // exception we need to throw. |
kmillikin@chromium.org | 13bd294 | 2009-12-16 15:36:05 +0000 | [diff] [blame] | 491 | if (IsContextual(object)) { |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 492 | return ReferenceError("not_defined", name); |
| 493 | } |
| 494 | return TypeError("undefined_method", object, name); |
| 495 | } |
| 496 | |
| 497 | // Lookup is valid: Update inline cache and stub cache. |
kmillikin@chromium.org | 5d8f0e6 | 2010-03-24 08:21:20 +0000 | [diff] [blame] | 498 | if (FLAG_use_ic) { |
erik.corry@gmail.com | 0511e24 | 2011-01-19 11:11:08 +0000 | [diff] [blame] | 499 | UpdateCaches(&lookup, state, extra_ic_state, object, name); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 500 | } |
| 501 | |
kasperl@chromium.org | 2abc450 | 2009-07-02 07:00:29 +0000 | [diff] [blame] | 502 | // Get the property. |
| 503 | PropertyAttributes attr; |
lrn@chromium.org | 303ada7 | 2010-10-27 09:33:13 +0000 | [diff] [blame] | 504 | Object* result; |
| 505 | { MaybeObject* maybe_result = |
| 506 | object->GetProperty(*object, &lookup, *name, &attr); |
| 507 | if (!maybe_result->ToObject(&result)) return maybe_result; |
| 508 | } |
fschneider@chromium.org | 3a5fd78 | 2011-02-24 10:10:44 +0000 | [diff] [blame] | 509 | |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 510 | if (lookup.type() == INTERCEPTOR) { |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 511 | // If the object does not have the requested property, check which |
| 512 | // exception we need to throw. |
| 513 | if (attr == ABSENT) { |
kmillikin@chromium.org | 13bd294 | 2009-12-16 15:36:05 +0000 | [diff] [blame] | 514 | if (IsContextual(object)) { |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 515 | return ReferenceError("not_defined", name); |
| 516 | } |
| 517 | return TypeError("undefined_method", object, name); |
| 518 | } |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 519 | } |
| 520 | |
fschneider@chromium.org | 3a5fd78 | 2011-02-24 10:10:44 +0000 | [diff] [blame] | 521 | ASSERT(!result->IsTheHole()); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 522 | |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 523 | HandleScope scope(isolate()); |
fschneider@chromium.org | 3a5fd78 | 2011-02-24 10:10:44 +0000 | [diff] [blame] | 524 | // Wrap result in a handle because ReceiverToObjectIfRequired may allocate |
| 525 | // new object and cause GC. |
| 526 | Handle<Object> result_handle(result); |
| 527 | // Make receiver an object if the callee requires it. Strict mode or builtin |
| 528 | // functions do not wrap the receiver, non-strict functions and objects |
| 529 | // called as functions do. |
| 530 | ReceiverToObjectIfRequired(result_handle, object); |
| 531 | |
| 532 | if (result_handle->IsJSFunction()) { |
ager@chromium.org | 65dad4b | 2009-04-23 08:48:43 +0000 | [diff] [blame] | 533 | #ifdef ENABLE_DEBUGGER_SUPPORT |
christian.plesner.hansen@gmail.com | 37abdec | 2009-01-06 14:43:28 +0000 | [diff] [blame] | 534 | // Handle stepping into a function if step into is active. |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 535 | Debug* debug = isolate()->debug(); |
| 536 | if (debug->StepInActive()) { |
christian.plesner.hansen@gmail.com | 37abdec | 2009-01-06 14:43:28 +0000 | [diff] [blame] | 537 | // Protect the result in a handle as the debugger can allocate and might |
| 538 | // cause GC. |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 539 | Handle<JSFunction> function(JSFunction::cast(*result_handle), isolate()); |
| 540 | debug->HandleStepIn(function, object, fp(), false); |
christian.plesner.hansen@gmail.com | 37abdec | 2009-01-06 14:43:28 +0000 | [diff] [blame] | 541 | return *function; |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 542 | } |
ager@chromium.org | 65dad4b | 2009-04-23 08:48:43 +0000 | [diff] [blame] | 543 | #endif |
christian.plesner.hansen@gmail.com | 37abdec | 2009-01-06 14:43:28 +0000 | [diff] [blame] | 544 | |
fschneider@chromium.org | 3a5fd78 | 2011-02-24 10:10:44 +0000 | [diff] [blame] | 545 | return *result_handle; |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 546 | } |
| 547 | |
| 548 | // Try to find a suitable function delegate for the object at hand. |
fschneider@chromium.org | 3a5fd78 | 2011-02-24 10:10:44 +0000 | [diff] [blame] | 549 | result_handle = Handle<Object>(TryCallAsFunction(*result_handle)); |
| 550 | if (result_handle->IsJSFunction()) return *result_handle; |
| 551 | |
| 552 | return TypeError("property_not_function", object, name); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 553 | } |
| 554 | |
| 555 | |
erik.corry@gmail.com | 0511e24 | 2011-01-19 11:11:08 +0000 | [diff] [blame] | 556 | bool CallICBase::TryUpdateExtraICState(LookupResult* lookup, |
| 557 | Handle<Object> object, |
| 558 | Code::ExtraICState* extra_ic_state) { |
| 559 | ASSERT(kind_ == Code::CALL_IC); |
| 560 | if (lookup->type() != CONSTANT_FUNCTION) return false; |
| 561 | JSFunction* function = lookup->GetConstantFunction(); |
| 562 | if (!function->shared()->HasBuiltinFunctionId()) return false; |
| 563 | |
| 564 | // Fetch the arguments passed to the called function. |
| 565 | const int argc = target()->arguments_count(); |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 566 | Address entry = isolate()->c_entry_fp(isolate()->thread_local_top()); |
erik.corry@gmail.com | 0511e24 | 2011-01-19 11:11:08 +0000 | [diff] [blame] | 567 | Address fp = Memory::Address_at(entry + ExitFrameConstants::kCallerFPOffset); |
| 568 | Arguments args(argc + 1, |
| 569 | &Memory::Object_at(fp + |
| 570 | StandardFrameConstants::kCallerSPOffset + |
| 571 | argc * kPointerSize)); |
| 572 | switch (function->shared()->builtin_function_id()) { |
| 573 | case kStringCharCodeAt: |
| 574 | case kStringCharAt: |
| 575 | if (object->IsString()) { |
| 576 | String* string = String::cast(*object); |
fschneider@chromium.org | 3a5fd78 | 2011-02-24 10:10:44 +0000 | [diff] [blame] | 577 | // Check there's the right string value or wrapper in the receiver slot. |
| 578 | ASSERT(string == args[0] || string == JSValue::cast(args[0])->value()); |
erik.corry@gmail.com | 0511e24 | 2011-01-19 11:11:08 +0000 | [diff] [blame] | 579 | // If we're in the default (fastest) state and the index is |
| 580 | // out of bounds, update the state to record this fact. |
danno@chromium.org | 40cb878 | 2011-05-25 07:58:50 +0000 | [diff] [blame] | 581 | if (StringStubState::decode(*extra_ic_state) == DEFAULT_STRING_STUB && |
erik.corry@gmail.com | 0511e24 | 2011-01-19 11:11:08 +0000 | [diff] [blame] | 582 | argc >= 1 && args[1]->IsNumber()) { |
svenpanne@chromium.org | 6d786c9 | 2011-06-15 10:58:27 +0000 | [diff] [blame] | 583 | double index = DoubleToInteger(args.number_at(1)); |
erik.corry@gmail.com | 0511e24 | 2011-01-19 11:11:08 +0000 | [diff] [blame] | 584 | if (index < 0 || index >= string->length()) { |
danno@chromium.org | 40cb878 | 2011-05-25 07:58:50 +0000 | [diff] [blame] | 585 | *extra_ic_state = |
| 586 | StringStubState::update(*extra_ic_state, |
| 587 | STRING_INDEX_OUT_OF_BOUNDS); |
erik.corry@gmail.com | 0511e24 | 2011-01-19 11:11:08 +0000 | [diff] [blame] | 588 | return true; |
| 589 | } |
| 590 | } |
| 591 | } |
| 592 | break; |
| 593 | default: |
| 594 | return false; |
| 595 | } |
| 596 | return false; |
| 597 | } |
| 598 | |
| 599 | |
| 600 | MaybeObject* CallICBase::ComputeMonomorphicStub( |
| 601 | LookupResult* lookup, |
| 602 | State state, |
| 603 | Code::ExtraICState extra_ic_state, |
| 604 | Handle<Object> object, |
| 605 | Handle<String> name) { |
| 606 | int argc = target()->arguments_count(); |
| 607 | InLoopFlag in_loop = target()->ic_in_loop(); |
| 608 | MaybeObject* maybe_code = NULL; |
| 609 | switch (lookup->type()) { |
| 610 | case FIELD: { |
| 611 | int index = lookup->GetFieldIndex(); |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 612 | maybe_code = isolate()->stub_cache()->ComputeCallField(argc, |
| 613 | in_loop, |
| 614 | kind_, |
danno@chromium.org | 40cb878 | 2011-05-25 07:58:50 +0000 | [diff] [blame] | 615 | extra_ic_state, |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 616 | *name, |
| 617 | *object, |
| 618 | lookup->holder(), |
| 619 | index); |
erik.corry@gmail.com | 0511e24 | 2011-01-19 11:11:08 +0000 | [diff] [blame] | 620 | break; |
| 621 | } |
| 622 | case CONSTANT_FUNCTION: { |
| 623 | // Get the constant function and compute the code stub for this |
| 624 | // call; used for rewriting to monomorphic state and making sure |
| 625 | // that the code stub is in the stub cache. |
| 626 | JSFunction* function = lookup->GetConstantFunction(); |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 627 | maybe_code = |
| 628 | isolate()->stub_cache()->ComputeCallConstant(argc, |
| 629 | in_loop, |
| 630 | kind_, |
| 631 | extra_ic_state, |
| 632 | *name, |
| 633 | *object, |
| 634 | lookup->holder(), |
| 635 | function); |
erik.corry@gmail.com | 0511e24 | 2011-01-19 11:11:08 +0000 | [diff] [blame] | 636 | break; |
| 637 | } |
| 638 | case NORMAL: { |
| 639 | if (!object->IsJSObject()) return NULL; |
| 640 | Handle<JSObject> receiver = Handle<JSObject>::cast(object); |
| 641 | |
| 642 | if (lookup->holder()->IsGlobalObject()) { |
| 643 | GlobalObject* global = GlobalObject::cast(lookup->holder()); |
| 644 | JSGlobalPropertyCell* cell = |
| 645 | JSGlobalPropertyCell::cast(global->GetPropertyCell(lookup)); |
| 646 | if (!cell->value()->IsJSFunction()) return NULL; |
| 647 | JSFunction* function = JSFunction::cast(cell->value()); |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 648 | maybe_code = isolate()->stub_cache()->ComputeCallGlobal(argc, |
| 649 | in_loop, |
| 650 | kind_, |
danno@chromium.org | 40cb878 | 2011-05-25 07:58:50 +0000 | [diff] [blame] | 651 | extra_ic_state, |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 652 | *name, |
| 653 | *receiver, |
| 654 | global, |
| 655 | cell, |
| 656 | function); |
erik.corry@gmail.com | 0511e24 | 2011-01-19 11:11:08 +0000 | [diff] [blame] | 657 | } else { |
| 658 | // There is only one shared stub for calling normalized |
| 659 | // properties. It does not traverse the prototype chain, so the |
| 660 | // property must be found in the receiver for the stub to be |
| 661 | // applicable. |
| 662 | if (lookup->holder() != *receiver) return NULL; |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 663 | maybe_code = isolate()->stub_cache()->ComputeCallNormal(argc, |
| 664 | in_loop, |
| 665 | kind_, |
danno@chromium.org | 40cb878 | 2011-05-25 07:58:50 +0000 | [diff] [blame] | 666 | extra_ic_state, |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 667 | *name, |
| 668 | *receiver); |
erik.corry@gmail.com | 0511e24 | 2011-01-19 11:11:08 +0000 | [diff] [blame] | 669 | } |
| 670 | break; |
| 671 | } |
| 672 | case INTERCEPTOR: { |
| 673 | ASSERT(HasInterceptorGetter(lookup->holder())); |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 674 | maybe_code = isolate()->stub_cache()->ComputeCallInterceptor( |
| 675 | argc, |
| 676 | kind_, |
danno@chromium.org | 40cb878 | 2011-05-25 07:58:50 +0000 | [diff] [blame] | 677 | extra_ic_state, |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 678 | *name, |
| 679 | *object, |
| 680 | lookup->holder()); |
erik.corry@gmail.com | 0511e24 | 2011-01-19 11:11:08 +0000 | [diff] [blame] | 681 | break; |
| 682 | } |
| 683 | default: |
| 684 | maybe_code = NULL; |
| 685 | break; |
| 686 | } |
| 687 | return maybe_code; |
| 688 | } |
| 689 | |
| 690 | |
lrn@chromium.org | 1af7e1b | 2010-06-07 11:12:01 +0000 | [diff] [blame] | 691 | void CallICBase::UpdateCaches(LookupResult* lookup, |
kmillikin@chromium.org | 69ea396 | 2010-07-05 11:01:40 +0000 | [diff] [blame] | 692 | State state, |
erik.corry@gmail.com | 0511e24 | 2011-01-19 11:11:08 +0000 | [diff] [blame] | 693 | Code::ExtraICState extra_ic_state, |
kmillikin@chromium.org | 69ea396 | 2010-07-05 11:01:40 +0000 | [diff] [blame] | 694 | Handle<Object> object, |
| 695 | Handle<String> name) { |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 696 | // Bail out if we didn't find a result. |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 697 | if (!lookup->IsProperty() || !lookup->IsCacheable()) return; |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 698 | |
kmillikin@chromium.org | 69ea396 | 2010-07-05 11:01:40 +0000 | [diff] [blame] | 699 | if (lookup->holder() != *object && |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 700 | HasNormalObjectsInPrototypeChain( |
| 701 | isolate(), lookup, object->GetPrototype())) { |
kmillikin@chromium.org | 69ea396 | 2010-07-05 11:01:40 +0000 | [diff] [blame] | 702 | // Suppress optimization for prototype chains with slow properties objects |
| 703 | // in the middle. |
| 704 | return; |
| 705 | } |
kmillikin@chromium.org | 69ea396 | 2010-07-05 11:01:40 +0000 | [diff] [blame] | 706 | |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 707 | // Compute the number of arguments. |
| 708 | int argc = target()->arguments_count(); |
kasperl@chromium.org | 71affb5 | 2009-05-26 05:44:31 +0000 | [diff] [blame] | 709 | InLoopFlag in_loop = target()->ic_in_loop(); |
lrn@chromium.org | 303ada7 | 2010-10-27 09:33:13 +0000 | [diff] [blame] | 710 | MaybeObject* maybe_code = NULL; |
erik.corry@gmail.com | 0511e24 | 2011-01-19 11:11:08 +0000 | [diff] [blame] | 711 | bool had_proto_failure = false; |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 712 | if (state == UNINITIALIZED) { |
| 713 | // This is the first time we execute this inline cache. |
| 714 | // Set the target to the pre monomorphic stub to delay |
| 715 | // setting the monomorphic state. |
danno@chromium.org | 40cb878 | 2011-05-25 07:58:50 +0000 | [diff] [blame] | 716 | maybe_code = |
| 717 | isolate()->stub_cache()->ComputeCallPreMonomorphic(argc, |
| 718 | in_loop, |
| 719 | kind_, |
| 720 | extra_ic_state); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 721 | } else if (state == MONOMORPHIC) { |
erik.corry@gmail.com | 0511e24 | 2011-01-19 11:11:08 +0000 | [diff] [blame] | 722 | if (kind_ == Code::CALL_IC && |
| 723 | TryUpdateExtraICState(lookup, object, &extra_ic_state)) { |
| 724 | maybe_code = ComputeMonomorphicStub(lookup, |
| 725 | state, |
| 726 | extra_ic_state, |
| 727 | object, |
| 728 | name); |
| 729 | } else if (kind_ == Code::CALL_IC && |
| 730 | TryRemoveInvalidPrototypeDependentStub(target(), |
| 731 | *object, |
| 732 | *name)) { |
| 733 | had_proto_failure = true; |
| 734 | maybe_code = ComputeMonomorphicStub(lookup, |
| 735 | state, |
| 736 | extra_ic_state, |
| 737 | object, |
| 738 | name); |
| 739 | } else { |
danno@chromium.org | 40cb878 | 2011-05-25 07:58:50 +0000 | [diff] [blame] | 740 | maybe_code = |
| 741 | isolate()->stub_cache()->ComputeCallMegamorphic(argc, |
| 742 | in_loop, |
| 743 | kind_, |
| 744 | extra_ic_state); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 745 | } |
erik.corry@gmail.com | 0511e24 | 2011-01-19 11:11:08 +0000 | [diff] [blame] | 746 | } else { |
| 747 | maybe_code = ComputeMonomorphicStub(lookup, |
| 748 | state, |
| 749 | extra_ic_state, |
| 750 | object, |
| 751 | name); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 752 | } |
| 753 | |
| 754 | // If we're unable to compute the stub (not enough memory left), we |
| 755 | // simply avoid updating the caches. |
erik.corry@gmail.com | 0511e24 | 2011-01-19 11:11:08 +0000 | [diff] [blame] | 756 | Object* code; |
lrn@chromium.org | 303ada7 | 2010-10-27 09:33:13 +0000 | [diff] [blame] | 757 | if (maybe_code == NULL || !maybe_code->ToObject(&code)) return; |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 758 | |
| 759 | // Patch the call site depending on the state of the cache. |
kasperl@chromium.org | 71affb5 | 2009-05-26 05:44:31 +0000 | [diff] [blame] | 760 | if (state == UNINITIALIZED || |
| 761 | state == PREMONOMORPHIC || |
| 762 | state == MONOMORPHIC || |
ager@chromium.org | 3bf7b91 | 2008-11-17 09:09:45 +0000 | [diff] [blame] | 763 | state == MONOMORPHIC_PROTOTYPE_FAILURE) { |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 764 | set_target(Code::cast(code)); |
whesse@chromium.org | 2c186ca | 2010-06-16 11:32:39 +0000 | [diff] [blame] | 765 | } else if (state == MEGAMORPHIC) { |
kmillikin@chromium.org | 69ea396 | 2010-07-05 11:01:40 +0000 | [diff] [blame] | 766 | // Cache code holding map should be consistent with |
| 767 | // GenerateMonomorphicCacheProbe. It is not the map which holds the stub. |
| 768 | Map* map = JSObject::cast(object->IsJSObject() ? *object : |
| 769 | object->GetPrototype())->map(); |
| 770 | |
whesse@chromium.org | 2c186ca | 2010-06-16 11:32:39 +0000 | [diff] [blame] | 771 | // Update the stub cache. |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 772 | isolate()->stub_cache()->Set(*name, map, Code::cast(code)); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 773 | } |
| 774 | |
erik.corry@gmail.com | 0511e24 | 2011-01-19 11:11:08 +0000 | [diff] [blame] | 775 | USE(had_proto_failure); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 776 | #ifdef DEBUG |
erik.corry@gmail.com | 0511e24 | 2011-01-19 11:11:08 +0000 | [diff] [blame] | 777 | if (had_proto_failure) state = MONOMORPHIC_PROTOTYPE_FAILURE; |
lrn@chromium.org | 1af7e1b | 2010-06-07 11:12:01 +0000 | [diff] [blame] | 778 | TraceIC(kind_ == Code::CALL_IC ? "CallIC" : "KeyedCallIC", |
| 779 | name, state, target(), in_loop ? " (in-loop)" : ""); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 780 | #endif |
| 781 | } |
| 782 | |
| 783 | |
lrn@chromium.org | 303ada7 | 2010-10-27 09:33:13 +0000 | [diff] [blame] | 784 | MaybeObject* KeyedCallIC::LoadFunction(State state, |
| 785 | Handle<Object> object, |
| 786 | Handle<Object> key) { |
lrn@chromium.org | 1af7e1b | 2010-06-07 11:12:01 +0000 | [diff] [blame] | 787 | if (key->IsSymbol()) { |
erik.corry@gmail.com | 0511e24 | 2011-01-19 11:11:08 +0000 | [diff] [blame] | 788 | return CallICBase::LoadFunction(state, |
| 789 | Code::kNoExtraICState, |
| 790 | object, |
| 791 | Handle<String>::cast(key)); |
lrn@chromium.org | 1af7e1b | 2010-06-07 11:12:01 +0000 | [diff] [blame] | 792 | } |
| 793 | |
| 794 | if (object->IsUndefined() || object->IsNull()) { |
| 795 | return TypeError("non_object_property_call", object, key); |
| 796 | } |
| 797 | |
whesse@chromium.org | 7b26015 | 2011-06-20 15:33:18 +0000 | [diff] [blame] | 798 | if (FLAG_use_ic && state != MEGAMORPHIC && object->IsHeapObject()) { |
ager@chromium.org | 2cc82ae | 2010-06-14 07:35:38 +0000 | [diff] [blame] | 799 | int argc = target()->arguments_count(); |
| 800 | InLoopFlag in_loop = target()->ic_in_loop(); |
whesse@chromium.org | 7b26015 | 2011-06-20 15:33:18 +0000 | [diff] [blame] | 801 | Heap* heap = Handle<HeapObject>::cast(object)->GetHeap(); |
| 802 | Map* map = heap->non_strict_arguments_elements_map(); |
| 803 | if (object->IsJSObject() && |
| 804 | Handle<JSObject>::cast(object)->elements()->map() == map) { |
| 805 | MaybeObject* maybe_code = isolate()->stub_cache()->ComputeCallArguments( |
| 806 | argc, in_loop, Code::KEYED_CALL_IC); |
| 807 | Object* code; |
| 808 | if (maybe_code->ToObject(&code)) { |
| 809 | set_target(Code::cast(code)); |
ager@chromium.org | 2cc82ae | 2010-06-14 07:35:38 +0000 | [diff] [blame] | 810 | #ifdef DEBUG |
whesse@chromium.org | 7b26015 | 2011-06-20 15:33:18 +0000 | [diff] [blame] | 811 | TraceIC( |
| 812 | "KeyedCallIC", key, state, target(), in_loop ? " (in-loop)" : ""); |
ager@chromium.org | 2cc82ae | 2010-06-14 07:35:38 +0000 | [diff] [blame] | 813 | #endif |
whesse@chromium.org | 7b26015 | 2011-06-20 15:33:18 +0000 | [diff] [blame] | 814 | } |
| 815 | } else if (FLAG_use_ic && state != MEGAMORPHIC && |
| 816 | !object->IsAccessCheckNeeded()) { |
| 817 | MaybeObject* maybe_code = isolate()->stub_cache()->ComputeCallMegamorphic( |
| 818 | argc, in_loop, Code::KEYED_CALL_IC, Code::kNoExtraICState); |
| 819 | Object* code; |
| 820 | if (maybe_code->ToObject(&code)) { |
| 821 | set_target(Code::cast(code)); |
| 822 | #ifdef DEBUG |
| 823 | TraceIC( |
| 824 | "KeyedCallIC", key, state, target(), in_loop ? " (in-loop)" : ""); |
| 825 | #endif |
| 826 | } |
lrn@chromium.org | 1af7e1b | 2010-06-07 11:12:01 +0000 | [diff] [blame] | 827 | } |
| 828 | } |
fschneider@chromium.org | 3a5fd78 | 2011-02-24 10:10:44 +0000 | [diff] [blame] | 829 | |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 830 | HandleScope scope(isolate()); |
fschneider@chromium.org | 3a5fd78 | 2011-02-24 10:10:44 +0000 | [diff] [blame] | 831 | Handle<Object> result = GetProperty(object, key); |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 832 | RETURN_IF_EMPTY_HANDLE(isolate(), result); |
fschneider@chromium.org | 3a5fd78 | 2011-02-24 10:10:44 +0000 | [diff] [blame] | 833 | |
| 834 | // Make receiver an object if the callee requires it. Strict mode or builtin |
| 835 | // functions do not wrap the receiver, non-strict functions and objects |
| 836 | // called as functions do. |
| 837 | ReceiverToObjectIfRequired(result, object); |
| 838 | |
| 839 | if (result->IsJSFunction()) return *result; |
| 840 | result = Handle<Object>(TryCallAsFunction(*result)); |
| 841 | if (result->IsJSFunction()) return *result; |
| 842 | |
| 843 | return TypeError("property_not_function", object, key); |
lrn@chromium.org | 1af7e1b | 2010-06-07 11:12:01 +0000 | [diff] [blame] | 844 | } |
| 845 | |
| 846 | |
lrn@chromium.org | 303ada7 | 2010-10-27 09:33:13 +0000 | [diff] [blame] | 847 | MaybeObject* LoadIC::Load(State state, |
| 848 | Handle<Object> object, |
| 849 | Handle<String> name) { |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 850 | // If the object is undefined or null it's illegal to try to get any |
| 851 | // of its properties; throw a TypeError in that case. |
| 852 | if (object->IsUndefined() || object->IsNull()) { |
| 853 | return TypeError("non_object_property_load", object, name); |
| 854 | } |
| 855 | |
| 856 | if (FLAG_use_ic) { |
kasperl@chromium.org | 9fe21c6 | 2008-10-28 08:53:51 +0000 | [diff] [blame] | 857 | // Use specialized code for getting the length of strings and |
| 858 | // string wrapper objects. The length property of string wrapper |
| 859 | // objects is read-only and therefore always returns the length of |
| 860 | // the underlying string value. See ECMA-262 15.5.5.1. |
| 861 | if ((object->IsString() || object->IsStringWrapper()) && |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 862 | name->Equals(isolate()->heap()->length_symbol())) { |
lrn@chromium.org | ac2828d | 2011-06-23 06:29:21 +0000 | [diff] [blame] | 863 | AssertNoAllocation no_allocation; |
| 864 | Code* stub = NULL; |
| 865 | if (state == UNINITIALIZED) { |
| 866 | stub = pre_monomorphic_stub(); |
| 867 | } else if (state == PREMONOMORPHIC) { |
ager@chromium.org | 378b34e | 2011-01-28 08:04:38 +0000 | [diff] [blame] | 868 | if (object->IsString()) { |
lrn@chromium.org | ac2828d | 2011-06-23 06:29:21 +0000 | [diff] [blame] | 869 | stub = isolate()->builtins()->builtin( |
| 870 | Builtins::kLoadIC_StringLength); |
ager@chromium.org | 378b34e | 2011-01-28 08:04:38 +0000 | [diff] [blame] | 871 | } else { |
lrn@chromium.org | ac2828d | 2011-06-23 06:29:21 +0000 | [diff] [blame] | 872 | stub = isolate()->builtins()->builtin( |
| 873 | Builtins::kLoadIC_StringWrapperLength); |
ager@chromium.org | 378b34e | 2011-01-28 08:04:38 +0000 | [diff] [blame] | 874 | } |
| 875 | } else if (state == MONOMORPHIC && object->IsStringWrapper()) { |
lrn@chromium.org | ac2828d | 2011-06-23 06:29:21 +0000 | [diff] [blame] | 876 | stub = isolate()->builtins()->builtin( |
| 877 | Builtins::kLoadIC_StringWrapperLength); |
| 878 | } else if (state != MEGAMORPHIC) { |
| 879 | stub = megamorphic_stub(); |
| 880 | } |
| 881 | if (stub != NULL) { |
| 882 | set_target(stub); |
| 883 | #ifdef DEBUG |
| 884 | if (FLAG_trace_ic) PrintF("[LoadIC : +#length /string]\n"); |
| 885 | #endif |
ager@chromium.org | 378b34e | 2011-01-28 08:04:38 +0000 | [diff] [blame] | 886 | } |
kasperl@chromium.org | 9fe21c6 | 2008-10-28 08:53:51 +0000 | [diff] [blame] | 887 | // Get the string if we have a string wrapper object. |
| 888 | if (object->IsJSValue()) { |
lrn@chromium.org | ac2828d | 2011-06-23 06:29:21 +0000 | [diff] [blame] | 889 | return Smi::FromInt( |
| 890 | String::cast(Handle<JSValue>::cast(object)->value())->length()); |
kasperl@chromium.org | 9fe21c6 | 2008-10-28 08:53:51 +0000 | [diff] [blame] | 891 | } |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 892 | return Smi::FromInt(String::cast(*object)->length()); |
| 893 | } |
| 894 | |
| 895 | // Use specialized code for getting the length of arrays. |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 896 | if (object->IsJSArray() && |
| 897 | name->Equals(isolate()->heap()->length_symbol())) { |
lrn@chromium.org | ac2828d | 2011-06-23 06:29:21 +0000 | [diff] [blame] | 898 | AssertNoAllocation no_allocation; |
| 899 | Code* stub = NULL; |
| 900 | if (state == UNINITIALIZED) { |
| 901 | stub = pre_monomorphic_stub(); |
| 902 | } else if (state == PREMONOMORPHIC) { |
| 903 | stub = isolate()->builtins()->builtin( |
| 904 | Builtins::kLoadIC_ArrayLength); |
| 905 | } else if (state != MEGAMORPHIC) { |
| 906 | stub = megamorphic_stub(); |
| 907 | } |
| 908 | if (stub != NULL) { |
| 909 | set_target(stub); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 910 | #ifdef DEBUG |
lrn@chromium.org | ac2828d | 2011-06-23 06:29:21 +0000 | [diff] [blame] | 911 | if (FLAG_trace_ic) PrintF("[LoadIC : +#length /array]\n"); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 912 | #endif |
ager@chromium.org | 378b34e | 2011-01-28 08:04:38 +0000 | [diff] [blame] | 913 | } |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 914 | return JSArray::cast(*object)->length(); |
| 915 | } |
| 916 | |
| 917 | // Use specialized code for getting prototype of functions. |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 918 | if (object->IsJSFunction() && |
| 919 | name->Equals(isolate()->heap()->prototype_symbol()) && |
kmillikin@chromium.org | 4111b80 | 2010-05-03 10:34:42 +0000 | [diff] [blame] | 920 | JSFunction::cast(*object)->should_have_prototype()) { |
lrn@chromium.org | ac2828d | 2011-06-23 06:29:21 +0000 | [diff] [blame] | 921 | { AssertNoAllocation no_allocation; |
| 922 | Code* stub = NULL; |
| 923 | if (state == UNINITIALIZED) { |
| 924 | stub = pre_monomorphic_stub(); |
| 925 | } else if (state == PREMONOMORPHIC) { |
| 926 | stub = isolate()->builtins()->builtin( |
| 927 | Builtins::kLoadIC_FunctionPrototype); |
| 928 | } else if (state != MEGAMORPHIC) { |
| 929 | stub = megamorphic_stub(); |
| 930 | } |
| 931 | if (stub != NULL) { |
| 932 | set_target(stub); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 933 | #ifdef DEBUG |
lrn@chromium.org | ac2828d | 2011-06-23 06:29:21 +0000 | [diff] [blame] | 934 | if (FLAG_trace_ic) PrintF("[LoadIC : +#prototype /function]\n"); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 935 | #endif |
lrn@chromium.org | ac2828d | 2011-06-23 06:29:21 +0000 | [diff] [blame] | 936 | } |
ager@chromium.org | 378b34e | 2011-01-28 08:04:38 +0000 | [diff] [blame] | 937 | } |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 938 | return Accessors::FunctionGetPrototype(*object, 0); |
| 939 | } |
| 940 | } |
| 941 | |
| 942 | // Check if the name is trivially convertible to an index and get |
| 943 | // the element if so. |
| 944 | uint32_t index; |
| 945 | if (name->AsArrayIndex(&index)) return object->GetElement(index); |
| 946 | |
| 947 | // Named lookup in the object. |
| 948 | LookupResult lookup; |
kasperl@chromium.org | 2abc450 | 2009-07-02 07:00:29 +0000 | [diff] [blame] | 949 | LookupForRead(*object, *name, &lookup); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 950 | |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 951 | // If we did not find a property, check if we need to throw an exception. |
| 952 | if (!lookup.IsProperty()) { |
ricow@chromium.org | 4f693d6 | 2011-07-04 14:01:31 +0000 | [diff] [blame] | 953 | if (IsContextual(object)) { |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 954 | return ReferenceError("not_defined", name); |
| 955 | } |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 956 | LOG(isolate(), SuspectReadEvent(*name, *object)); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 957 | } |
| 958 | |
| 959 | // Update inline cache and stub cache. |
kmillikin@chromium.org | 5d8f0e6 | 2010-03-24 08:21:20 +0000 | [diff] [blame] | 960 | if (FLAG_use_ic) { |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 961 | UpdateCaches(&lookup, state, object, name); |
| 962 | } |
| 963 | |
| 964 | PropertyAttributes attr; |
kmillikin@chromium.org | c53e10d | 2011-05-18 09:12:58 +0000 | [diff] [blame] | 965 | if (lookup.IsProperty() && |
| 966 | (lookup.type() == INTERCEPTOR || lookup.type() == HANDLER)) { |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 967 | // Get the property. |
lrn@chromium.org | 303ada7 | 2010-10-27 09:33:13 +0000 | [diff] [blame] | 968 | Object* result; |
| 969 | { MaybeObject* maybe_result = |
| 970 | object->GetProperty(*object, &lookup, *name, &attr); |
| 971 | if (!maybe_result->ToObject(&result)) return maybe_result; |
| 972 | } |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 973 | // If the property is not present, check if we need to throw an |
| 974 | // exception. |
kmillikin@chromium.org | 13bd294 | 2009-12-16 15:36:05 +0000 | [diff] [blame] | 975 | if (attr == ABSENT && IsContextual(object)) { |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 976 | return ReferenceError("not_defined", name); |
| 977 | } |
| 978 | return result; |
| 979 | } |
| 980 | |
| 981 | // Get the property. |
| 982 | return object->GetProperty(*object, &lookup, *name, &attr); |
| 983 | } |
| 984 | |
| 985 | |
| 986 | void LoadIC::UpdateCaches(LookupResult* lookup, |
| 987 | State state, |
| 988 | Handle<Object> object, |
| 989 | Handle<String> name) { |
ricow@chromium.org | c9c8082 | 2010-04-21 08:22:37 +0000 | [diff] [blame] | 990 | // Bail out if the result is not cacheable. |
| 991 | if (!lookup->IsCacheable()) return; |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 992 | |
| 993 | // Loading properties from values is not common, so don't try to |
| 994 | // deal with non-JS objects here. |
| 995 | if (!object->IsJSObject()) return; |
| 996 | Handle<JSObject> receiver = Handle<JSObject>::cast(object); |
| 997 | |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 998 | if (HasNormalObjectsInPrototypeChain(isolate(), lookup, *object)) return; |
kmillikin@chromium.org | 69ea396 | 2010-07-05 11:01:40 +0000 | [diff] [blame] | 999 | |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1000 | // Compute the code stub for this load. |
lrn@chromium.org | 303ada7 | 2010-10-27 09:33:13 +0000 | [diff] [blame] | 1001 | MaybeObject* maybe_code = NULL; |
| 1002 | Object* code; |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1003 | if (state == UNINITIALIZED) { |
| 1004 | // This is the first time we execute this inline cache. |
| 1005 | // Set the target to the pre monomorphic stub to delay |
| 1006 | // setting the monomorphic state. |
lrn@chromium.org | 303ada7 | 2010-10-27 09:33:13 +0000 | [diff] [blame] | 1007 | maybe_code = pre_monomorphic_stub(); |
ricow@chromium.org | c9c8082 | 2010-04-21 08:22:37 +0000 | [diff] [blame] | 1008 | } else if (!lookup->IsProperty()) { |
| 1009 | // Nonexistent property. The result is undefined. |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 1010 | maybe_code = isolate()->stub_cache()->ComputeLoadNonexistent(*name, |
| 1011 | *receiver); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1012 | } else { |
| 1013 | // Compute monomorphic stub. |
| 1014 | switch (lookup->type()) { |
| 1015 | case FIELD: { |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 1016 | maybe_code = isolate()->stub_cache()->ComputeLoadField( |
| 1017 | *name, |
| 1018 | *receiver, |
| 1019 | lookup->holder(), |
| 1020 | lookup->GetFieldIndex()); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1021 | break; |
| 1022 | } |
| 1023 | case CONSTANT_FUNCTION: { |
| 1024 | Object* constant = lookup->GetConstantFunction(); |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 1025 | maybe_code = isolate()->stub_cache()->ComputeLoadConstant( |
| 1026 | *name, *receiver, lookup->holder(), constant); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1027 | break; |
| 1028 | } |
| 1029 | case NORMAL: { |
kasperl@chromium.org | defbd10 | 2009-07-13 14:04:26 +0000 | [diff] [blame] | 1030 | if (lookup->holder()->IsGlobalObject()) { |
| 1031 | GlobalObject* global = GlobalObject::cast(lookup->holder()); |
kasperl@chromium.org | 2abc450 | 2009-07-02 07:00:29 +0000 | [diff] [blame] | 1032 | JSGlobalPropertyCell* cell = |
| 1033 | JSGlobalPropertyCell::cast(global->GetPropertyCell(lookup)); |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 1034 | maybe_code = isolate()->stub_cache()->ComputeLoadGlobal(*name, |
lrn@chromium.org | 303ada7 | 2010-10-27 09:33:13 +0000 | [diff] [blame] | 1035 | *receiver, |
| 1036 | global, |
| 1037 | cell, |
| 1038 | lookup->IsDontDelete()); |
kasperl@chromium.org | 2abc450 | 2009-07-02 07:00:29 +0000 | [diff] [blame] | 1039 | } else { |
| 1040 | // There is only one shared stub for loading normalized |
| 1041 | // properties. It does not traverse the prototype chain, so the |
| 1042 | // property must be found in the receiver for the stub to be |
| 1043 | // applicable. |
| 1044 | if (lookup->holder() != *receiver) return; |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 1045 | maybe_code = isolate()->stub_cache()->ComputeLoadNormal(); |
kasperl@chromium.org | 2abc450 | 2009-07-02 07:00:29 +0000 | [diff] [blame] | 1046 | } |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1047 | break; |
| 1048 | } |
| 1049 | case CALLBACKS: { |
| 1050 | if (!lookup->GetCallbackObject()->IsAccessorInfo()) return; |
| 1051 | AccessorInfo* callback = |
| 1052 | AccessorInfo::cast(lookup->GetCallbackObject()); |
| 1053 | if (v8::ToCData<Address>(callback->getter()) == 0) return; |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 1054 | maybe_code = isolate()->stub_cache()->ComputeLoadCallback( |
| 1055 | *name, *receiver, lookup->holder(), callback); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1056 | break; |
| 1057 | } |
| 1058 | case INTERCEPTOR: { |
kasperl@chromium.org | 2abc450 | 2009-07-02 07:00:29 +0000 | [diff] [blame] | 1059 | ASSERT(HasInterceptorGetter(lookup->holder())); |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 1060 | maybe_code = isolate()->stub_cache()->ComputeLoadInterceptor( |
| 1061 | *name, *receiver, lookup->holder()); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1062 | break; |
| 1063 | } |
| 1064 | default: |
| 1065 | return; |
| 1066 | } |
| 1067 | } |
| 1068 | |
| 1069 | // If we're unable to compute the stub (not enough memory left), we |
| 1070 | // simply avoid updating the caches. |
lrn@chromium.org | 303ada7 | 2010-10-27 09:33:13 +0000 | [diff] [blame] | 1071 | if (maybe_code == NULL || !maybe_code->ToObject(&code)) return; |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1072 | |
| 1073 | // Patch the call site depending on the state of the cache. |
| 1074 | if (state == UNINITIALIZED || state == PREMONOMORPHIC || |
| 1075 | state == MONOMORPHIC_PROTOTYPE_FAILURE) { |
| 1076 | set_target(Code::cast(code)); |
| 1077 | } else if (state == MONOMORPHIC) { |
| 1078 | set_target(megamorphic_stub()); |
whesse@chromium.org | 2c186ca | 2010-06-16 11:32:39 +0000 | [diff] [blame] | 1079 | } else if (state == MEGAMORPHIC) { |
kmillikin@chromium.org | 69ea396 | 2010-07-05 11:01:40 +0000 | [diff] [blame] | 1080 | // Cache code holding map should be consistent with |
| 1081 | // GenerateMonomorphicCacheProbe. |
| 1082 | Map* map = JSObject::cast(object->IsJSObject() ? *object : |
| 1083 | object->GetPrototype())->map(); |
| 1084 | |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 1085 | isolate()->stub_cache()->Set(*name, map, Code::cast(code)); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1086 | } |
| 1087 | |
| 1088 | #ifdef DEBUG |
| 1089 | TraceIC("LoadIC", name, state, target()); |
| 1090 | #endif |
| 1091 | } |
| 1092 | |
| 1093 | |
sgjesse@chromium.org | 6db8871 | 2011-07-11 11:41:22 +0000 | [diff] [blame] | 1094 | MaybeObject* KeyedLoadIC::GetElementStubWithoutMapCheck( |
| 1095 | bool is_js_array, |
svenpanne@chromium.org | 6d786c9 | 2011-06-15 10:58:27 +0000 | [diff] [blame] | 1096 | JSObject::ElementsKind elements_kind) { |
sgjesse@chromium.org | 6db8871 | 2011-07-11 11:41:22 +0000 | [diff] [blame] | 1097 | return KeyedLoadElementStub(elements_kind).TryGetCode(); |
ager@chromium.org | ea91cc5 | 2011-05-23 06:06:11 +0000 | [diff] [blame] | 1098 | } |
| 1099 | |
| 1100 | |
| 1101 | MaybeObject* KeyedLoadIC::ConstructMegamorphicStub( |
| 1102 | MapList* receiver_maps, |
| 1103 | CodeList* targets, |
| 1104 | StrictModeFlag strict_mode) { |
| 1105 | Object* object; |
| 1106 | KeyedLoadStubCompiler compiler; |
| 1107 | MaybeObject* maybe_code = compiler.CompileLoadMegamorphic(receiver_maps, |
| 1108 | targets); |
| 1109 | if (!maybe_code->ToObject(&object)) return maybe_code; |
| 1110 | isolate()->counters()->keyed_load_polymorphic_stubs()->Increment(); |
| 1111 | PROFILE(isolate(), CodeCreateEvent( |
| 1112 | Logger::KEYED_LOAD_MEGAMORPHIC_IC_TAG, |
| 1113 | Code::cast(object), 0)); |
| 1114 | return object; |
| 1115 | } |
| 1116 | |
| 1117 | |
lrn@chromium.org | 303ada7 | 2010-10-27 09:33:13 +0000 | [diff] [blame] | 1118 | MaybeObject* KeyedLoadIC::Load(State state, |
| 1119 | Handle<Object> object, |
ager@chromium.org | ea91cc5 | 2011-05-23 06:06:11 +0000 | [diff] [blame] | 1120 | Handle<Object> key, |
| 1121 | bool force_generic_stub) { |
kmillikin@chromium.org | c36ce6e | 2011-04-04 08:25:31 +0000 | [diff] [blame] | 1122 | // Check for values that can be converted into a symbol. |
| 1123 | // TODO(1295): Remove this code. |
| 1124 | HandleScope scope(isolate()); |
| 1125 | if (key->IsHeapNumber() && |
| 1126 | isnan(HeapNumber::cast(*key)->value())) { |
| 1127 | key = isolate()->factory()->nan_symbol(); |
| 1128 | } else if (key->IsUndefined()) { |
| 1129 | key = isolate()->factory()->undefined_symbol(); |
| 1130 | } |
| 1131 | |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1132 | if (key->IsSymbol()) { |
| 1133 | Handle<String> name = Handle<String>::cast(key); |
| 1134 | |
| 1135 | // If the object is undefined or null it's illegal to try to get any |
| 1136 | // of its properties; throw a TypeError in that case. |
| 1137 | if (object->IsUndefined() || object->IsNull()) { |
| 1138 | return TypeError("non_object_property_load", object, name); |
| 1139 | } |
| 1140 | |
kasperl@chromium.org | aa95aeb | 2009-07-28 10:59:50 +0000 | [diff] [blame] | 1141 | if (FLAG_use_ic) { |
ager@chromium.org | 378b34e | 2011-01-28 08:04:38 +0000 | [diff] [blame] | 1142 | // TODO(1073): don't ignore the current stub state. |
| 1143 | |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1144 | // Use specialized code for getting the length of strings. |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 1145 | if (object->IsString() && |
| 1146 | name->Equals(isolate()->heap()->length_symbol())) { |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1147 | Handle<String> string = Handle<String>::cast(object); |
| 1148 | Object* code = NULL; |
lrn@chromium.org | 303ada7 | 2010-10-27 09:33:13 +0000 | [diff] [blame] | 1149 | { MaybeObject* maybe_code = |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 1150 | isolate()->stub_cache()->ComputeKeyedLoadStringLength(*name, |
| 1151 | *string); |
lrn@chromium.org | 303ada7 | 2010-10-27 09:33:13 +0000 | [diff] [blame] | 1152 | if (!maybe_code->ToObject(&code)) return maybe_code; |
| 1153 | } |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1154 | set_target(Code::cast(code)); |
| 1155 | #ifdef DEBUG |
| 1156 | TraceIC("KeyedLoadIC", name, state, target()); |
kasperl@chromium.org | e959c18 | 2009-07-27 08:59:04 +0000 | [diff] [blame] | 1157 | #endif // DEBUG |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1158 | return Smi::FromInt(string->length()); |
| 1159 | } |
| 1160 | |
| 1161 | // Use specialized code for getting the length of arrays. |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 1162 | if (object->IsJSArray() && |
| 1163 | name->Equals(isolate()->heap()->length_symbol())) { |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1164 | Handle<JSArray> array = Handle<JSArray>::cast(object); |
lrn@chromium.org | 303ada7 | 2010-10-27 09:33:13 +0000 | [diff] [blame] | 1165 | Object* code; |
| 1166 | { MaybeObject* maybe_code = |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 1167 | isolate()->stub_cache()->ComputeKeyedLoadArrayLength(*name, |
| 1168 | *array); |
lrn@chromium.org | 303ada7 | 2010-10-27 09:33:13 +0000 | [diff] [blame] | 1169 | if (!maybe_code->ToObject(&code)) return maybe_code; |
| 1170 | } |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1171 | set_target(Code::cast(code)); |
| 1172 | #ifdef DEBUG |
| 1173 | TraceIC("KeyedLoadIC", name, state, target()); |
kasperl@chromium.org | e959c18 | 2009-07-27 08:59:04 +0000 | [diff] [blame] | 1174 | #endif // DEBUG |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1175 | return JSArray::cast(*object)->length(); |
| 1176 | } |
| 1177 | |
| 1178 | // Use specialized code for getting prototype of functions. |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 1179 | if (object->IsJSFunction() && |
| 1180 | name->Equals(isolate()->heap()->prototype_symbol()) && |
kmillikin@chromium.org | 4111b80 | 2010-05-03 10:34:42 +0000 | [diff] [blame] | 1181 | JSFunction::cast(*object)->should_have_prototype()) { |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1182 | Handle<JSFunction> function = Handle<JSFunction>::cast(object); |
lrn@chromium.org | 303ada7 | 2010-10-27 09:33:13 +0000 | [diff] [blame] | 1183 | Object* code; |
| 1184 | { MaybeObject* maybe_code = |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 1185 | isolate()->stub_cache()->ComputeKeyedLoadFunctionPrototype( |
| 1186 | *name, *function); |
lrn@chromium.org | 303ada7 | 2010-10-27 09:33:13 +0000 | [diff] [blame] | 1187 | if (!maybe_code->ToObject(&code)) return maybe_code; |
| 1188 | } |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1189 | set_target(Code::cast(code)); |
| 1190 | #ifdef DEBUG |
| 1191 | TraceIC("KeyedLoadIC", name, state, target()); |
kasperl@chromium.org | e959c18 | 2009-07-27 08:59:04 +0000 | [diff] [blame] | 1192 | #endif // DEBUG |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1193 | return Accessors::FunctionGetPrototype(*object, 0); |
| 1194 | } |
| 1195 | } |
| 1196 | |
| 1197 | // Check if the name is trivially convertible to an index and get |
| 1198 | // the element or char if so. |
| 1199 | uint32_t index = 0; |
| 1200 | if (name->AsArrayIndex(&index)) { |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 1201 | HandleScope scope(isolate()); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1202 | // Rewrite to the generic keyed load stub. |
| 1203 | if (FLAG_use_ic) set_target(generic_stub()); |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 1204 | return Runtime::GetElementOrCharAt(isolate(), object, index); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1205 | } |
| 1206 | |
| 1207 | // Named lookup. |
| 1208 | LookupResult lookup; |
kasperl@chromium.org | 2abc450 | 2009-07-02 07:00:29 +0000 | [diff] [blame] | 1209 | LookupForRead(*object, *name, &lookup); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1210 | |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 1211 | // If we did not find a property, check if we need to throw an exception. |
ricow@chromium.org | 4f693d6 | 2011-07-04 14:01:31 +0000 | [diff] [blame] | 1212 | if (!lookup.IsProperty() && IsContextual(object)) { |
| 1213 | return ReferenceError("not_defined", name); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1214 | } |
| 1215 | |
kmillikin@chromium.org | 5d8f0e6 | 2010-03-24 08:21:20 +0000 | [diff] [blame] | 1216 | if (FLAG_use_ic) { |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1217 | UpdateCaches(&lookup, state, object, name); |
| 1218 | } |
| 1219 | |
| 1220 | PropertyAttributes attr; |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 1221 | if (lookup.IsProperty() && lookup.type() == INTERCEPTOR) { |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1222 | // Get the property. |
lrn@chromium.org | 303ada7 | 2010-10-27 09:33:13 +0000 | [diff] [blame] | 1223 | Object* result; |
| 1224 | { MaybeObject* maybe_result = |
| 1225 | object->GetProperty(*object, &lookup, *name, &attr); |
| 1226 | if (!maybe_result->ToObject(&result)) return maybe_result; |
| 1227 | } |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1228 | // If the property is not present, check if we need to throw an |
| 1229 | // exception. |
kmillikin@chromium.org | 13bd294 | 2009-12-16 15:36:05 +0000 | [diff] [blame] | 1230 | if (attr == ABSENT && IsContextual(object)) { |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1231 | return ReferenceError("not_defined", name); |
| 1232 | } |
| 1233 | return result; |
| 1234 | } |
| 1235 | |
| 1236 | return object->GetProperty(*object, &lookup, *name, &attr); |
| 1237 | } |
| 1238 | |
| 1239 | // Do not use ICs for objects that require access checks (including |
| 1240 | // the global object). |
| 1241 | bool use_ic = FLAG_use_ic && !object->IsAccessCheckNeeded(); |
| 1242 | |
christian.plesner.hansen@gmail.com | 37abdec | 2009-01-06 14:43:28 +0000 | [diff] [blame] | 1243 | if (use_ic) { |
ager@chromium.org | 3811b43 | 2009-10-28 14:53:37 +0000 | [diff] [blame] | 1244 | Code* stub = generic_stub(); |
ager@chromium.org | ea91cc5 | 2011-05-23 06:06:11 +0000 | [diff] [blame] | 1245 | if (!force_generic_stub) { |
ricow@chromium.org | 83aa549 | 2011-02-07 12:42:56 +0000 | [diff] [blame] | 1246 | if (object->IsString() && key->IsNumber()) { |
ager@chromium.org | ea91cc5 | 2011-05-23 06:06:11 +0000 | [diff] [blame] | 1247 | if (state == UNINITIALIZED) { |
| 1248 | stub = string_stub(); |
| 1249 | } |
ricow@chromium.org | 83aa549 | 2011-02-07 12:42:56 +0000 | [diff] [blame] | 1250 | } else if (object->IsJSObject()) { |
ager@chromium.org | ea91cc5 | 2011-05-23 06:06:11 +0000 | [diff] [blame] | 1251 | JSObject* receiver = JSObject::cast(*object); |
whesse@chromium.org | 7b26015 | 2011-06-20 15:33:18 +0000 | [diff] [blame] | 1252 | Heap* heap = Handle<JSObject>::cast(object)->GetHeap(); |
| 1253 | Map* elements_map = Handle<JSObject>::cast(object)->elements()->map(); |
| 1254 | if (elements_map == heap->non_strict_arguments_elements_map()) { |
| 1255 | stub = non_strict_arguments_stub(); |
| 1256 | } else if (receiver->HasIndexedInterceptor()) { |
ricow@chromium.org | 83aa549 | 2011-02-07 12:42:56 +0000 | [diff] [blame] | 1257 | stub = indexed_interceptor_stub(); |
whesse@chromium.org | 7b26015 | 2011-06-20 15:33:18 +0000 | [diff] [blame] | 1258 | } else if (key->IsSmi() && (target() != non_strict_arguments_stub())) { |
ager@chromium.org | ea91cc5 | 2011-05-23 06:06:11 +0000 | [diff] [blame] | 1259 | MaybeObject* maybe_stub = ComputeStub(receiver, |
| 1260 | false, |
| 1261 | kNonStrictMode, |
| 1262 | stub); |
| 1263 | stub = maybe_stub->IsFailure() ? |
| 1264 | NULL : Code::cast(maybe_stub->ToObjectUnchecked()); |
ricow@chromium.org | 83aa549 | 2011-02-07 12:42:56 +0000 | [diff] [blame] | 1265 | } |
ager@chromium.org | 3811b43 | 2009-10-28 14:53:37 +0000 | [diff] [blame] | 1266 | } |
| 1267 | } |
kasperl@chromium.org | a555126 | 2010-12-07 12:49:48 +0000 | [diff] [blame] | 1268 | if (stub != NULL) set_target(stub); |
ager@chromium.org | ea91cc5 | 2011-05-23 06:06:11 +0000 | [diff] [blame] | 1269 | } |
kasperl@chromium.org | a555126 | 2010-12-07 12:49:48 +0000 | [diff] [blame] | 1270 | |
| 1271 | #ifdef DEBUG |
ager@chromium.org | ea91cc5 | 2011-05-23 06:06:11 +0000 | [diff] [blame] | 1272 | TraceIC("KeyedLoadIC", key, state, target()); |
kasperl@chromium.org | a555126 | 2010-12-07 12:49:48 +0000 | [diff] [blame] | 1273 | #endif // DEBUG |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1274 | |
| 1275 | // Get the property. |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 1276 | return Runtime::GetObjectProperty(isolate(), object, key); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1277 | } |
| 1278 | |
| 1279 | |
| 1280 | void KeyedLoadIC::UpdateCaches(LookupResult* lookup, State state, |
| 1281 | Handle<Object> object, Handle<String> name) { |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1282 | // Bail out if we didn't find a result. |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 1283 | if (!lookup->IsProperty() || !lookup->IsCacheable()) return; |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1284 | |
| 1285 | if (!object->IsJSObject()) return; |
| 1286 | Handle<JSObject> receiver = Handle<JSObject>::cast(object); |
| 1287 | |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 1288 | if (HasNormalObjectsInPrototypeChain(isolate(), lookup, *object)) return; |
kmillikin@chromium.org | 69ea396 | 2010-07-05 11:01:40 +0000 | [diff] [blame] | 1289 | |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1290 | // Compute the code stub for this load. |
lrn@chromium.org | 303ada7 | 2010-10-27 09:33:13 +0000 | [diff] [blame] | 1291 | MaybeObject* maybe_code = NULL; |
| 1292 | Object* code; |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1293 | |
| 1294 | if (state == UNINITIALIZED) { |
| 1295 | // This is the first time we execute this inline cache. |
| 1296 | // Set the target to the pre monomorphic stub to delay |
| 1297 | // setting the monomorphic state. |
lrn@chromium.org | 303ada7 | 2010-10-27 09:33:13 +0000 | [diff] [blame] | 1298 | maybe_code = pre_monomorphic_stub(); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1299 | } else { |
| 1300 | // Compute a monomorphic stub. |
| 1301 | switch (lookup->type()) { |
| 1302 | case FIELD: { |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 1303 | maybe_code = isolate()->stub_cache()->ComputeKeyedLoadField( |
| 1304 | *name, *receiver, lookup->holder(), lookup->GetFieldIndex()); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1305 | break; |
| 1306 | } |
| 1307 | case CONSTANT_FUNCTION: { |
| 1308 | Object* constant = lookup->GetConstantFunction(); |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 1309 | maybe_code = isolate()->stub_cache()->ComputeKeyedLoadConstant( |
| 1310 | *name, *receiver, lookup->holder(), constant); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1311 | break; |
| 1312 | } |
| 1313 | case CALLBACKS: { |
| 1314 | if (!lookup->GetCallbackObject()->IsAccessorInfo()) return; |
| 1315 | AccessorInfo* callback = |
| 1316 | AccessorInfo::cast(lookup->GetCallbackObject()); |
| 1317 | if (v8::ToCData<Address>(callback->getter()) == 0) return; |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 1318 | maybe_code = isolate()->stub_cache()->ComputeKeyedLoadCallback( |
| 1319 | *name, *receiver, lookup->holder(), callback); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1320 | break; |
| 1321 | } |
| 1322 | case INTERCEPTOR: { |
kasperl@chromium.org | 2abc450 | 2009-07-02 07:00:29 +0000 | [diff] [blame] | 1323 | ASSERT(HasInterceptorGetter(lookup->holder())); |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 1324 | maybe_code = isolate()->stub_cache()->ComputeKeyedLoadInterceptor( |
| 1325 | *name, *receiver, lookup->holder()); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1326 | break; |
| 1327 | } |
| 1328 | default: { |
| 1329 | // Always rewrite to the generic case so that we do not |
| 1330 | // repeatedly try to rewrite. |
lrn@chromium.org | 303ada7 | 2010-10-27 09:33:13 +0000 | [diff] [blame] | 1331 | maybe_code = generic_stub(); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1332 | break; |
| 1333 | } |
| 1334 | } |
| 1335 | } |
| 1336 | |
| 1337 | // If we're unable to compute the stub (not enough memory left), we |
| 1338 | // simply avoid updating the caches. |
lrn@chromium.org | 303ada7 | 2010-10-27 09:33:13 +0000 | [diff] [blame] | 1339 | if (maybe_code == NULL || !maybe_code->ToObject(&code)) return; |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1340 | |
| 1341 | // Patch the call site depending on the state of the cache. Make |
| 1342 | // sure to always rewrite from monomorphic to megamorphic. |
| 1343 | ASSERT(state != MONOMORPHIC_PROTOTYPE_FAILURE); |
| 1344 | if (state == UNINITIALIZED || state == PREMONOMORPHIC) { |
| 1345 | set_target(Code::cast(code)); |
| 1346 | } else if (state == MONOMORPHIC) { |
| 1347 | set_target(megamorphic_stub()); |
| 1348 | } |
| 1349 | |
| 1350 | #ifdef DEBUG |
| 1351 | TraceIC("KeyedLoadIC", name, state, target()); |
| 1352 | #endif |
| 1353 | } |
| 1354 | |
| 1355 | |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 1356 | static bool StoreICableLookup(LookupResult* lookup) { |
| 1357 | // Bail out if we didn't find a result. |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 1358 | if (!lookup->IsPropertyOrTransition() || !lookup->IsCacheable()) return false; |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 1359 | |
| 1360 | // If the property is read-only, we leave the IC in its current |
| 1361 | // state. |
| 1362 | if (lookup->IsReadOnly()) return false; |
| 1363 | |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 1364 | return true; |
| 1365 | } |
| 1366 | |
| 1367 | |
ricow@chromium.org | d2be901 | 2011-06-01 06:00:58 +0000 | [diff] [blame] | 1368 | static bool LookupForWrite(JSReceiver* receiver, |
kasperl@chromium.org | 2abc450 | 2009-07-02 07:00:29 +0000 | [diff] [blame] | 1369 | String* name, |
| 1370 | LookupResult* lookup) { |
ricow@chromium.org | d2be901 | 2011-06-01 06:00:58 +0000 | [diff] [blame] | 1371 | receiver->LocalLookup(name, lookup); |
ager@chromium.org | 5aa501c | 2009-06-23 07:57:28 +0000 | [diff] [blame] | 1372 | if (!StoreICableLookup(lookup)) { |
| 1373 | return false; |
| 1374 | } |
| 1375 | |
| 1376 | if (lookup->type() == INTERCEPTOR) { |
ricow@chromium.org | d2be901 | 2011-06-01 06:00:58 +0000 | [diff] [blame] | 1377 | JSObject* object = JSObject::cast(receiver); |
ager@chromium.org | 5aa501c | 2009-06-23 07:57:28 +0000 | [diff] [blame] | 1378 | if (object->GetNamedInterceptor()->setter()->IsUndefined()) { |
| 1379 | object->LocalLookupRealNamedProperty(name, lookup); |
| 1380 | return StoreICableLookup(lookup); |
| 1381 | } |
| 1382 | } |
| 1383 | |
| 1384 | return true; |
| 1385 | } |
| 1386 | |
| 1387 | |
lrn@chromium.org | 303ada7 | 2010-10-27 09:33:13 +0000 | [diff] [blame] | 1388 | MaybeObject* StoreIC::Store(State state, |
ager@chromium.org | 9ee27ae | 2011-03-02 13:43:26 +0000 | [diff] [blame] | 1389 | StrictModeFlag strict_mode, |
lrn@chromium.org | 303ada7 | 2010-10-27 09:33:13 +0000 | [diff] [blame] | 1390 | Handle<Object> object, |
| 1391 | Handle<String> name, |
| 1392 | Handle<Object> value) { |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1393 | // If the object is undefined or null it's illegal to try to set any |
| 1394 | // properties on it; throw a TypeError in that case. |
| 1395 | if (object->IsUndefined() || object->IsNull()) { |
| 1396 | return TypeError("non_object_property_store", object, name); |
| 1397 | } |
| 1398 | |
ricow@chromium.org | d2be901 | 2011-06-01 06:00:58 +0000 | [diff] [blame] | 1399 | if (!object->IsJSReceiver()) { |
karlklose@chromium.org | 8f806e8 | 2011-03-07 14:06:08 +0000 | [diff] [blame] | 1400 | // The length property of string values is read-only. Throw in strict mode. |
| 1401 | if (strict_mode == kStrictMode && object->IsString() && |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 1402 | name->Equals(isolate()->heap()->length_symbol())) { |
karlklose@chromium.org | 8f806e8 | 2011-03-07 14:06:08 +0000 | [diff] [blame] | 1403 | return TypeError("strict_read_only_property", object, name); |
| 1404 | } |
| 1405 | // Ignore stores where the receiver is not a JSObject. |
| 1406 | return *value; |
| 1407 | } |
| 1408 | |
ricow@chromium.org | d2be901 | 2011-06-01 06:00:58 +0000 | [diff] [blame] | 1409 | // Handle proxies. |
| 1410 | if (object->IsJSProxy()) { |
| 1411 | return JSReceiver::cast(*object)-> |
| 1412 | SetProperty(*name, *value, NONE, strict_mode); |
| 1413 | } |
| 1414 | |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1415 | Handle<JSObject> receiver = Handle<JSObject>::cast(object); |
| 1416 | |
| 1417 | // Check if the given name is an array index. |
| 1418 | uint32_t index; |
| 1419 | if (name->AsArrayIndex(&index)) { |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 1420 | HandleScope scope(isolate()); |
karlklose@chromium.org | 8f806e8 | 2011-03-07 14:06:08 +0000 | [diff] [blame] | 1421 | Handle<Object> result = SetElement(receiver, index, value, strict_mode); |
mads.s.ager@gmail.com | 9a4089a | 2008-09-01 08:55:01 +0000 | [diff] [blame] | 1422 | if (result.is_null()) return Failure::Exception(); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1423 | return *value; |
| 1424 | } |
| 1425 | |
ager@chromium.org | ce5e87b | 2010-03-10 10:24:18 +0000 | [diff] [blame] | 1426 | // Use specialized code for setting the length of arrays. |
| 1427 | if (receiver->IsJSArray() |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 1428 | && name->Equals(isolate()->heap()->length_symbol()) |
ricow@chromium.org | d2be901 | 2011-06-01 06:00:58 +0000 | [diff] [blame] | 1429 | && JSArray::cast(*receiver)->AllowsSetElementsLength()) { |
ager@chromium.org | ce5e87b | 2010-03-10 10:24:18 +0000 | [diff] [blame] | 1430 | #ifdef DEBUG |
| 1431 | if (FLAG_trace_ic) PrintF("[StoreIC : +#length /array]\n"); |
| 1432 | #endif |
ager@chromium.org | 9ee27ae | 2011-03-02 13:43:26 +0000 | [diff] [blame] | 1433 | Builtins::Name target = (strict_mode == kStrictMode) |
fschneider@chromium.org | 7979bbb | 2011-03-28 10:47:03 +0000 | [diff] [blame] | 1434 | ? Builtins::kStoreIC_ArrayLength_Strict |
| 1435 | : Builtins::kStoreIC_ArrayLength; |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 1436 | set_target(isolate()->builtins()->builtin(target)); |
ager@chromium.org | 9ee27ae | 2011-03-02 13:43:26 +0000 | [diff] [blame] | 1437 | return receiver->SetProperty(*name, *value, NONE, strict_mode); |
ager@chromium.org | ce5e87b | 2010-03-10 10:24:18 +0000 | [diff] [blame] | 1438 | } |
| 1439 | |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1440 | // Lookup the property locally in the receiver. |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 1441 | if (FLAG_use_ic && !receiver->IsJSGlobalProxy()) { |
| 1442 | LookupResult lookup; |
fschneider@chromium.org | ed78ffd | 2010-07-21 11:05:19 +0000 | [diff] [blame] | 1443 | |
kasperl@chromium.org | 2abc450 | 2009-07-02 07:00:29 +0000 | [diff] [blame] | 1444 | if (LookupForWrite(*receiver, *name, &lookup)) { |
danno@chromium.org | 160a7b0 | 2011-04-18 15:51:38 +0000 | [diff] [blame] | 1445 | // Generate a stub for this store. |
ager@chromium.org | 9ee27ae | 2011-03-02 13:43:26 +0000 | [diff] [blame] | 1446 | UpdateCaches(&lookup, state, strict_mode, receiver, name, value); |
sgjesse@chromium.org | 496c03a | 2011-02-14 12:05:43 +0000 | [diff] [blame] | 1447 | } else { |
ager@chromium.org | 9ee27ae | 2011-03-02 13:43:26 +0000 | [diff] [blame] | 1448 | // Strict mode doesn't allow setting non-existent global property |
| 1449 | // or an assignment to a read only property. |
| 1450 | if (strict_mode == kStrictMode) { |
| 1451 | if (lookup.IsFound() && lookup.IsReadOnly()) { |
| 1452 | return TypeError("strict_read_only_property", object, name); |
| 1453 | } else if (IsContextual(object)) { |
| 1454 | return ReferenceError("not_defined", name); |
| 1455 | } |
sgjesse@chromium.org | 496c03a | 2011-02-14 12:05:43 +0000 | [diff] [blame] | 1456 | } |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 1457 | } |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1458 | } |
| 1459 | |
kasperl@chromium.org | a555126 | 2010-12-07 12:49:48 +0000 | [diff] [blame] | 1460 | if (receiver->IsJSGlobalProxy()) { |
| 1461 | // Generate a generic stub that goes to the runtime when we see a global |
| 1462 | // proxy as receiver. |
ager@chromium.org | 9ee27ae | 2011-03-02 13:43:26 +0000 | [diff] [blame] | 1463 | Code* stub = (strict_mode == kStrictMode) |
sgjesse@chromium.org | 496c03a | 2011-02-14 12:05:43 +0000 | [diff] [blame] | 1464 | ? global_proxy_stub_strict() |
| 1465 | : global_proxy_stub(); |
| 1466 | if (target() != stub) { |
| 1467 | set_target(stub); |
kasperl@chromium.org | a555126 | 2010-12-07 12:49:48 +0000 | [diff] [blame] | 1468 | #ifdef DEBUG |
| 1469 | TraceIC("StoreIC", name, state, target()); |
| 1470 | #endif |
| 1471 | } |
| 1472 | } |
| 1473 | |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1474 | // Set the property. |
ager@chromium.org | 9ee27ae | 2011-03-02 13:43:26 +0000 | [diff] [blame] | 1475 | return receiver->SetProperty(*name, *value, NONE, strict_mode); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1476 | } |
| 1477 | |
| 1478 | |
| 1479 | void StoreIC::UpdateCaches(LookupResult* lookup, |
| 1480 | State state, |
ager@chromium.org | 9ee27ae | 2011-03-02 13:43:26 +0000 | [diff] [blame] | 1481 | StrictModeFlag strict_mode, |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1482 | Handle<JSObject> receiver, |
| 1483 | Handle<String> name, |
| 1484 | Handle<Object> value) { |
kasperl@chromium.org | 5a8ca6c | 2008-10-23 13:57:19 +0000 | [diff] [blame] | 1485 | // Skip JSGlobalProxy. |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 1486 | ASSERT(!receiver->IsJSGlobalProxy()); |
kasperl@chromium.org | 5a8ca6c | 2008-10-23 13:57:19 +0000 | [diff] [blame] | 1487 | |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 1488 | ASSERT(StoreICableLookup(lookup)); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1489 | |
| 1490 | // If the property has a non-field type allowing map transitions |
| 1491 | // where there is extra room in the object, we leave the IC in its |
| 1492 | // current state. |
| 1493 | PropertyType type = lookup->type(); |
| 1494 | |
| 1495 | // Compute the code stub for this store; used for rewriting to |
| 1496 | // monomorphic state and making sure that the code stub is in the |
| 1497 | // stub cache. |
lrn@chromium.org | 303ada7 | 2010-10-27 09:33:13 +0000 | [diff] [blame] | 1498 | MaybeObject* maybe_code = NULL; |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1499 | Object* code = NULL; |
| 1500 | switch (type) { |
| 1501 | case FIELD: { |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 1502 | maybe_code = isolate()->stub_cache()->ComputeStoreField( |
ager@chromium.org | 9ee27ae | 2011-03-02 13:43:26 +0000 | [diff] [blame] | 1503 | *name, *receiver, lookup->GetFieldIndex(), NULL, strict_mode); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1504 | break; |
| 1505 | } |
| 1506 | case MAP_TRANSITION: { |
| 1507 | if (lookup->GetAttributes() != NONE) return; |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 1508 | HandleScope scope(isolate()); |
kasperl@chromium.org | 41044eb | 2008-10-06 08:24:46 +0000 | [diff] [blame] | 1509 | ASSERT(type == MAP_TRANSITION); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1510 | Handle<Map> transition(lookup->GetTransitionMap()); |
| 1511 | int index = transition->PropertyIndexFor(*name); |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 1512 | maybe_code = isolate()->stub_cache()->ComputeStoreField( |
ager@chromium.org | 9ee27ae | 2011-03-02 13:43:26 +0000 | [diff] [blame] | 1513 | *name, *receiver, index, *transition, strict_mode); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1514 | break; |
| 1515 | } |
kasperl@chromium.org | 2abc450 | 2009-07-02 07:00:29 +0000 | [diff] [blame] | 1516 | case NORMAL: { |
kmillikin@chromium.org | 69ea396 | 2010-07-05 11:01:40 +0000 | [diff] [blame] | 1517 | if (receiver->IsGlobalObject()) { |
| 1518 | // The stub generated for the global object picks the value directly |
| 1519 | // from the property cell. So the property must be directly on the |
| 1520 | // global object. |
| 1521 | Handle<GlobalObject> global = Handle<GlobalObject>::cast(receiver); |
| 1522 | JSGlobalPropertyCell* cell = |
| 1523 | JSGlobalPropertyCell::cast(global->GetPropertyCell(lookup)); |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 1524 | maybe_code = isolate()->stub_cache()->ComputeStoreGlobal( |
ager@chromium.org | 9ee27ae | 2011-03-02 13:43:26 +0000 | [diff] [blame] | 1525 | *name, *global, cell, strict_mode); |
kmillikin@chromium.org | 69ea396 | 2010-07-05 11:01:40 +0000 | [diff] [blame] | 1526 | } else { |
| 1527 | if (lookup->holder() != *receiver) return; |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 1528 | maybe_code = isolate()->stub_cache()->ComputeStoreNormal(strict_mode); |
kasperl@chromium.org | 2abc450 | 2009-07-02 07:00:29 +0000 | [diff] [blame] | 1529 | } |
kasperl@chromium.org | 2abc450 | 2009-07-02 07:00:29 +0000 | [diff] [blame] | 1530 | break; |
| 1531 | } |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1532 | case CALLBACKS: { |
| 1533 | if (!lookup->GetCallbackObject()->IsAccessorInfo()) return; |
| 1534 | AccessorInfo* callback = AccessorInfo::cast(lookup->GetCallbackObject()); |
| 1535 | if (v8::ToCData<Address>(callback->setter()) == 0) return; |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 1536 | maybe_code = isolate()->stub_cache()->ComputeStoreCallback( |
ager@chromium.org | 9ee27ae | 2011-03-02 13:43:26 +0000 | [diff] [blame] | 1537 | *name, *receiver, callback, strict_mode); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1538 | break; |
| 1539 | } |
| 1540 | case INTERCEPTOR: { |
kasperl@chromium.org | 2abc450 | 2009-07-02 07:00:29 +0000 | [diff] [blame] | 1541 | ASSERT(!receiver->GetNamedInterceptor()->setter()->IsUndefined()); |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 1542 | maybe_code = isolate()->stub_cache()->ComputeStoreInterceptor( |
ager@chromium.org | 9ee27ae | 2011-03-02 13:43:26 +0000 | [diff] [blame] | 1543 | *name, *receiver, strict_mode); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1544 | break; |
| 1545 | } |
| 1546 | default: |
| 1547 | return; |
| 1548 | } |
| 1549 | |
| 1550 | // If we're unable to compute the stub (not enough memory left), we |
| 1551 | // simply avoid updating the caches. |
lrn@chromium.org | 303ada7 | 2010-10-27 09:33:13 +0000 | [diff] [blame] | 1552 | if (maybe_code == NULL || !maybe_code->ToObject(&code)) return; |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1553 | |
| 1554 | // Patch the call site depending on the state of the cache. |
| 1555 | if (state == UNINITIALIZED || state == MONOMORPHIC_PROTOTYPE_FAILURE) { |
| 1556 | set_target(Code::cast(code)); |
| 1557 | } else if (state == MONOMORPHIC) { |
whesse@chromium.org | 2c186ca | 2010-06-16 11:32:39 +0000 | [diff] [blame] | 1558 | // Only move to megamorphic if the target changes. |
sgjesse@chromium.org | 496c03a | 2011-02-14 12:05:43 +0000 | [diff] [blame] | 1559 | if (target() != Code::cast(code)) { |
ager@chromium.org | 9ee27ae | 2011-03-02 13:43:26 +0000 | [diff] [blame] | 1560 | set_target((strict_mode == kStrictMode) |
sgjesse@chromium.org | 496c03a | 2011-02-14 12:05:43 +0000 | [diff] [blame] | 1561 | ? megamorphic_stub_strict() |
| 1562 | : megamorphic_stub()); |
| 1563 | } |
whesse@chromium.org | 2c186ca | 2010-06-16 11:32:39 +0000 | [diff] [blame] | 1564 | } else if (state == MEGAMORPHIC) { |
| 1565 | // Update the stub cache. |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 1566 | isolate()->stub_cache()->Set(*name, |
| 1567 | receiver->map(), |
| 1568 | Code::cast(code)); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1569 | } |
| 1570 | |
| 1571 | #ifdef DEBUG |
| 1572 | TraceIC("StoreIC", name, state, target()); |
| 1573 | #endif |
| 1574 | } |
| 1575 | |
| 1576 | |
ager@chromium.org | ea91cc5 | 2011-05-23 06:06:11 +0000 | [diff] [blame] | 1577 | static bool AddOneReceiverMapIfMissing(MapList* receiver_maps, |
| 1578 | Map* new_receiver_map) { |
| 1579 | for (int current = 0; current < receiver_maps->length(); ++current) { |
| 1580 | if (receiver_maps->at(current) == new_receiver_map) { |
| 1581 | return false; |
| 1582 | } |
| 1583 | } |
| 1584 | receiver_maps->Add(new_receiver_map); |
| 1585 | return true; |
| 1586 | } |
| 1587 | |
| 1588 | |
| 1589 | void KeyedIC::GetReceiverMapsForStub(Code* stub, MapList* result) { |
| 1590 | ASSERT(stub->is_inline_cache_stub()); |
| 1591 | if (stub == string_stub()) { |
| 1592 | return result->Add(isolate()->heap()->string_map()); |
| 1593 | } else if (stub->is_keyed_load_stub() || stub->is_keyed_store_stub()) { |
| 1594 | if (stub->ic_state() == MONOMORPHIC) { |
| 1595 | result->Add(Map::cast(stub->FindFirstMap())); |
| 1596 | } else { |
| 1597 | ASSERT(stub->ic_state() == MEGAMORPHIC); |
| 1598 | AssertNoAllocation no_allocation; |
| 1599 | int mask = RelocInfo::ModeMask(RelocInfo::EMBEDDED_OBJECT); |
| 1600 | for (RelocIterator it(stub, mask); !it.done(); it.next()) { |
| 1601 | RelocInfo* info = it.rinfo(); |
| 1602 | Object* object = info->target_object(); |
| 1603 | ASSERT(object->IsMap()); |
| 1604 | result->Add(Map::cast(object)); |
| 1605 | } |
| 1606 | } |
| 1607 | } |
| 1608 | } |
| 1609 | |
| 1610 | |
| 1611 | MaybeObject* KeyedIC::ComputeStub(JSObject* receiver, |
| 1612 | bool is_store, |
| 1613 | StrictModeFlag strict_mode, |
| 1614 | Code* generic_stub) { |
| 1615 | State ic_state = target()->ic_state(); |
ager@chromium.org | ea91cc5 | 2011-05-23 06:06:11 +0000 | [diff] [blame] | 1616 | if (ic_state == UNINITIALIZED || ic_state == PREMONOMORPHIC) { |
ricow@chromium.org | 4f693d6 | 2011-07-04 14:01:31 +0000 | [diff] [blame] | 1617 | Code* monomorphic_stub; |
| 1618 | MaybeObject* maybe_stub = ComputeMonomorphicStub(receiver, |
| 1619 | is_store, |
| 1620 | strict_mode, |
| 1621 | generic_stub); |
| 1622 | if (!maybe_stub->To(&monomorphic_stub)) return maybe_stub; |
| 1623 | |
ager@chromium.org | ea91cc5 | 2011-05-23 06:06:11 +0000 | [diff] [blame] | 1624 | return monomorphic_stub; |
| 1625 | } |
| 1626 | ASSERT(target() != generic_stub); |
| 1627 | |
| 1628 | // Don't handle megamorphic property accesses for INTERCEPTORS or CALLBACKS |
| 1629 | // via megamorphic stubs, since they don't have a map in their relocation info |
| 1630 | // and so the stubs can't be harvested for the object needed for a map check. |
| 1631 | if (target()->type() != NORMAL) { |
| 1632 | return generic_stub; |
| 1633 | } |
| 1634 | |
| 1635 | // Determine the list of receiver maps that this call site has seen, |
| 1636 | // adding the map that was just encountered. |
| 1637 | MapList target_receiver_maps; |
| 1638 | GetReceiverMapsForStub(target(), &target_receiver_maps); |
| 1639 | if (!AddOneReceiverMapIfMissing(&target_receiver_maps, receiver->map())) { |
| 1640 | // If the miss wasn't due to an unseen map, a MEGAMORPHIC stub |
| 1641 | // won't help, use the generic stub. |
| 1642 | return generic_stub; |
| 1643 | } |
| 1644 | |
jkummerow@chromium.org | e297f59 | 2011-06-08 10:05:15 +0000 | [diff] [blame] | 1645 | // If the maximum number of receiver maps has been exceeded, use the generic |
ager@chromium.org | ea91cc5 | 2011-05-23 06:06:11 +0000 | [diff] [blame] | 1646 | // version of the IC. |
whesse@chromium.org | 7b26015 | 2011-06-20 15:33:18 +0000 | [diff] [blame] | 1647 | if (target_receiver_maps.length() > kMaxKeyedPolymorphism) { |
ager@chromium.org | ea91cc5 | 2011-05-23 06:06:11 +0000 | [diff] [blame] | 1648 | return generic_stub; |
| 1649 | } |
| 1650 | |
jkummerow@chromium.org | e297f59 | 2011-06-08 10:05:15 +0000 | [diff] [blame] | 1651 | PolymorphicCodeCache* cache = isolate()->heap()->polymorphic_code_cache(); |
| 1652 | Code::Flags flags = Code::ComputeFlags(this->kind(), |
| 1653 | NOT_IN_LOOP, |
| 1654 | MEGAMORPHIC, |
| 1655 | strict_mode); |
| 1656 | Object* maybe_cached_stub = cache->Lookup(&target_receiver_maps, flags); |
| 1657 | // If there is a cached stub, use it. |
| 1658 | if (!maybe_cached_stub->IsUndefined()) { |
ager@chromium.org | ea91cc5 | 2011-05-23 06:06:11 +0000 | [diff] [blame] | 1659 | ASSERT(maybe_cached_stub->IsCode()); |
| 1660 | return Code::cast(maybe_cached_stub); |
| 1661 | } |
jkummerow@chromium.org | e297f59 | 2011-06-08 10:05:15 +0000 | [diff] [blame] | 1662 | // Collect MONOMORPHIC stubs for all target_receiver_maps. |
| 1663 | CodeList handler_ics(target_receiver_maps.length()); |
| 1664 | for (int i = 0; i < target_receiver_maps.length(); ++i) { |
| 1665 | Map* receiver_map(target_receiver_maps.at(i)); |
ager@chromium.org | ea91cc5 | 2011-05-23 06:06:11 +0000 | [diff] [blame] | 1666 | MaybeObject* maybe_cached_stub = ComputeMonomorphicStubWithoutMapCheck( |
sgjesse@chromium.org | 6db8871 | 2011-07-11 11:41:22 +0000 | [diff] [blame] | 1667 | receiver_map, strict_mode); |
ager@chromium.org | ea91cc5 | 2011-05-23 06:06:11 +0000 | [diff] [blame] | 1668 | Code* cached_stub; |
jkummerow@chromium.org | e297f59 | 2011-06-08 10:05:15 +0000 | [diff] [blame] | 1669 | if (!maybe_cached_stub->To(&cached_stub)) return maybe_cached_stub; |
ager@chromium.org | ea91cc5 | 2011-05-23 06:06:11 +0000 | [diff] [blame] | 1670 | handler_ics.Add(cached_stub); |
| 1671 | } |
ager@chromium.org | ea91cc5 | 2011-05-23 06:06:11 +0000 | [diff] [blame] | 1672 | // Build the MEGAMORPHIC stub. |
jkummerow@chromium.org | e297f59 | 2011-06-08 10:05:15 +0000 | [diff] [blame] | 1673 | Code* stub; |
ricow@chromium.org | 4f693d6 | 2011-07-04 14:01:31 +0000 | [diff] [blame] | 1674 | MaybeObject* maybe_stub = ConstructMegamorphicStub(&target_receiver_maps, |
| 1675 | &handler_ics, |
| 1676 | strict_mode); |
ager@chromium.org | ea91cc5 | 2011-05-23 06:06:11 +0000 | [diff] [blame] | 1677 | if (!maybe_stub->To(&stub)) return maybe_stub; |
jkummerow@chromium.org | e297f59 | 2011-06-08 10:05:15 +0000 | [diff] [blame] | 1678 | MaybeObject* maybe_update = cache->Update(&target_receiver_maps, flags, stub); |
ager@chromium.org | ea91cc5 | 2011-05-23 06:06:11 +0000 | [diff] [blame] | 1679 | if (maybe_update->IsFailure()) return maybe_update; |
| 1680 | return stub; |
| 1681 | } |
| 1682 | |
| 1683 | |
| 1684 | MaybeObject* KeyedIC::ComputeMonomorphicStubWithoutMapCheck( |
| 1685 | Map* receiver_map, |
sgjesse@chromium.org | 6db8871 | 2011-07-11 11:41:22 +0000 | [diff] [blame] | 1686 | StrictModeFlag strict_mode) { |
ager@chromium.org | ea91cc5 | 2011-05-23 06:06:11 +0000 | [diff] [blame] | 1687 | if ((receiver_map->instance_type() & kNotStringTag) == 0) { |
| 1688 | ASSERT(string_stub() != NULL); |
| 1689 | return string_stub(); |
ager@chromium.org | ea91cc5 | 2011-05-23 06:06:11 +0000 | [diff] [blame] | 1690 | } else { |
sgjesse@chromium.org | 6db8871 | 2011-07-11 11:41:22 +0000 | [diff] [blame] | 1691 | ASSERT(receiver_map->has_dictionary_elements() || |
| 1692 | receiver_map->has_fast_elements() || |
| 1693 | receiver_map->has_fast_double_elements() || |
| 1694 | receiver_map->has_external_array_elements()); |
| 1695 | bool is_js_array = receiver_map->instance_type() == JS_ARRAY_TYPE; |
| 1696 | return GetElementStubWithoutMapCheck(is_js_array, |
| 1697 | receiver_map->elements_kind()); |
ager@chromium.org | ea91cc5 | 2011-05-23 06:06:11 +0000 | [diff] [blame] | 1698 | } |
| 1699 | } |
| 1700 | |
| 1701 | |
| 1702 | MaybeObject* KeyedIC::ComputeMonomorphicStub(JSObject* receiver, |
| 1703 | bool is_store, |
| 1704 | StrictModeFlag strict_mode, |
| 1705 | Code* generic_stub) { |
| 1706 | Code* result = NULL; |
svenpanne@chromium.org | 6d786c9 | 2011-06-15 10:58:27 +0000 | [diff] [blame] | 1707 | if (receiver->HasFastElements() || |
ricow@chromium.org | 4f693d6 | 2011-07-04 14:01:31 +0000 | [diff] [blame] | 1708 | receiver->HasExternalArrayElements() || |
sgjesse@chromium.org | 6db8871 | 2011-07-11 11:41:22 +0000 | [diff] [blame] | 1709 | receiver->HasFastDoubleElements() || |
ricow@chromium.org | 4f693d6 | 2011-07-04 14:01:31 +0000 | [diff] [blame] | 1710 | receiver->HasDictionaryElements()) { |
ager@chromium.org | ea91cc5 | 2011-05-23 06:06:11 +0000 | [diff] [blame] | 1711 | MaybeObject* maybe_stub = |
svenpanne@chromium.org | 6d786c9 | 2011-06-15 10:58:27 +0000 | [diff] [blame] | 1712 | isolate()->stub_cache()->ComputeKeyedLoadOrStoreElement( |
ager@chromium.org | ea91cc5 | 2011-05-23 06:06:11 +0000 | [diff] [blame] | 1713 | receiver, is_store, strict_mode); |
| 1714 | if (!maybe_stub->To(&result)) return maybe_stub; |
| 1715 | } else { |
| 1716 | result = generic_stub; |
| 1717 | } |
| 1718 | return result; |
| 1719 | } |
| 1720 | |
| 1721 | |
sgjesse@chromium.org | 6db8871 | 2011-07-11 11:41:22 +0000 | [diff] [blame] | 1722 | MaybeObject* KeyedStoreIC::GetElementStubWithoutMapCheck( |
| 1723 | bool is_js_array, |
svenpanne@chromium.org | 6d786c9 | 2011-06-15 10:58:27 +0000 | [diff] [blame] | 1724 | JSObject::ElementsKind elements_kind) { |
sgjesse@chromium.org | 6db8871 | 2011-07-11 11:41:22 +0000 | [diff] [blame] | 1725 | return KeyedStoreElementStub(is_js_array, elements_kind).TryGetCode(); |
ager@chromium.org | ea91cc5 | 2011-05-23 06:06:11 +0000 | [diff] [blame] | 1726 | } |
| 1727 | |
| 1728 | |
| 1729 | MaybeObject* KeyedStoreIC::ConstructMegamorphicStub( |
| 1730 | MapList* receiver_maps, |
| 1731 | CodeList* targets, |
| 1732 | StrictModeFlag strict_mode) { |
| 1733 | Object* object; |
| 1734 | KeyedStoreStubCompiler compiler(strict_mode); |
| 1735 | MaybeObject* maybe_code = compiler.CompileStoreMegamorphic(receiver_maps, |
| 1736 | targets); |
| 1737 | if (!maybe_code->ToObject(&object)) return maybe_code; |
| 1738 | isolate()->counters()->keyed_store_polymorphic_stubs()->Increment(); |
| 1739 | PROFILE(isolate(), CodeCreateEvent( |
| 1740 | Logger::KEYED_STORE_MEGAMORPHIC_IC_TAG, |
| 1741 | Code::cast(object), 0)); |
| 1742 | return object; |
| 1743 | } |
| 1744 | |
| 1745 | |
lrn@chromium.org | 303ada7 | 2010-10-27 09:33:13 +0000 | [diff] [blame] | 1746 | MaybeObject* KeyedStoreIC::Store(State state, |
ager@chromium.org | 9ee27ae | 2011-03-02 13:43:26 +0000 | [diff] [blame] | 1747 | StrictModeFlag strict_mode, |
lrn@chromium.org | 303ada7 | 2010-10-27 09:33:13 +0000 | [diff] [blame] | 1748 | Handle<Object> object, |
| 1749 | Handle<Object> key, |
ager@chromium.org | ea91cc5 | 2011-05-23 06:06:11 +0000 | [diff] [blame] | 1750 | Handle<Object> value, |
| 1751 | bool force_generic) { |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1752 | if (key->IsSymbol()) { |
| 1753 | Handle<String> name = Handle<String>::cast(key); |
| 1754 | |
| 1755 | // If the object is undefined or null it's illegal to try to set any |
| 1756 | // properties on it; throw a TypeError in that case. |
| 1757 | if (object->IsUndefined() || object->IsNull()) { |
| 1758 | return TypeError("non_object_property_store", object, name); |
| 1759 | } |
| 1760 | |
| 1761 | // Ignore stores where the receiver is not a JSObject. |
| 1762 | if (!object->IsJSObject()) return *value; |
| 1763 | Handle<JSObject> receiver = Handle<JSObject>::cast(object); |
| 1764 | |
| 1765 | // Check if the given name is an array index. |
| 1766 | uint32_t index; |
| 1767 | if (name->AsArrayIndex(&index)) { |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 1768 | HandleScope scope(isolate()); |
karlklose@chromium.org | 8f806e8 | 2011-03-07 14:06:08 +0000 | [diff] [blame] | 1769 | Handle<Object> result = SetElement(receiver, index, value, strict_mode); |
mads.s.ager@gmail.com | 9a4089a | 2008-09-01 08:55:01 +0000 | [diff] [blame] | 1770 | if (result.is_null()) return Failure::Exception(); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1771 | return *value; |
| 1772 | } |
| 1773 | |
| 1774 | // Lookup the property locally in the receiver. |
| 1775 | LookupResult lookup; |
| 1776 | receiver->LocalLookup(*name, &lookup); |
| 1777 | |
| 1778 | // Update inline cache and stub cache. |
kmillikin@chromium.org | 5d8f0e6 | 2010-03-24 08:21:20 +0000 | [diff] [blame] | 1779 | if (FLAG_use_ic) { |
ager@chromium.org | 9ee27ae | 2011-03-02 13:43:26 +0000 | [diff] [blame] | 1780 | UpdateCaches(&lookup, state, strict_mode, receiver, name, value); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1781 | } |
| 1782 | |
| 1783 | // Set the property. |
ager@chromium.org | 9ee27ae | 2011-03-02 13:43:26 +0000 | [diff] [blame] | 1784 | return receiver->SetProperty(*name, *value, NONE, strict_mode); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1785 | } |
| 1786 | |
| 1787 | // Do not use ICs for objects that require access checks (including |
| 1788 | // the global object). |
| 1789 | bool use_ic = FLAG_use_ic && !object->IsAccessCheckNeeded(); |
kasperl@chromium.org | 5a8ca6c | 2008-10-23 13:57:19 +0000 | [diff] [blame] | 1790 | ASSERT(!(use_ic && object->IsJSGlobalProxy())); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1791 | |
ager@chromium.org | 3811b43 | 2009-10-28 14:53:37 +0000 | [diff] [blame] | 1792 | if (use_ic) { |
ager@chromium.org | ea91cc5 | 2011-05-23 06:06:11 +0000 | [diff] [blame] | 1793 | Code* stub = (strict_mode == kStrictMode) |
| 1794 | ? generic_stub_strict() |
| 1795 | : generic_stub(); |
whesse@chromium.org | 7b26015 | 2011-06-20 15:33:18 +0000 | [diff] [blame] | 1796 | if (object->IsJSObject()) { |
| 1797 | JSObject* receiver = JSObject::cast(*object); |
| 1798 | Heap* heap = Handle<JSObject>::cast(object)->GetHeap(); |
| 1799 | Map* elements_map = Handle<JSObject>::cast(object)->elements()->map(); |
| 1800 | if (elements_map == heap->non_strict_arguments_elements_map()) { |
| 1801 | stub = non_strict_arguments_stub(); |
| 1802 | } else if (!force_generic) { |
| 1803 | if (key->IsSmi() && (target() != non_strict_arguments_stub())) { |
ricow@chromium.org | 4f693d6 | 2011-07-04 14:01:31 +0000 | [diff] [blame] | 1804 | HandleScope scope(isolate()); |
whesse@chromium.org | 7b26015 | 2011-06-20 15:33:18 +0000 | [diff] [blame] | 1805 | MaybeObject* maybe_stub = ComputeStub(receiver, |
| 1806 | true, |
| 1807 | strict_mode, |
| 1808 | stub); |
| 1809 | stub = maybe_stub->IsFailure() ? |
| 1810 | NULL : Code::cast(maybe_stub->ToObjectUnchecked()); |
| 1811 | } |
ager@chromium.org | 3811b43 | 2009-10-28 14:53:37 +0000 | [diff] [blame] | 1812 | } |
| 1813 | } |
kasperl@chromium.org | a555126 | 2010-12-07 12:49:48 +0000 | [diff] [blame] | 1814 | if (stub != NULL) set_target(stub); |
ager@chromium.org | 3811b43 | 2009-10-28 14:53:37 +0000 | [diff] [blame] | 1815 | } |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1816 | |
ager@chromium.org | ea91cc5 | 2011-05-23 06:06:11 +0000 | [diff] [blame] | 1817 | #ifdef DEBUG |
| 1818 | TraceIC("KeyedStoreIC", key, state, target()); |
| 1819 | #endif |
| 1820 | |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1821 | // Set the property. |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 1822 | return Runtime::SetObjectProperty( |
| 1823 | isolate(), object , key, value, NONE, strict_mode); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1824 | } |
| 1825 | |
| 1826 | |
| 1827 | void KeyedStoreIC::UpdateCaches(LookupResult* lookup, |
| 1828 | State state, |
ager@chromium.org | 9ee27ae | 2011-03-02 13:43:26 +0000 | [diff] [blame] | 1829 | StrictModeFlag strict_mode, |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1830 | Handle<JSObject> receiver, |
| 1831 | Handle<String> name, |
| 1832 | Handle<Object> value) { |
kasperl@chromium.org | 5a8ca6c | 2008-10-23 13:57:19 +0000 | [diff] [blame] | 1833 | // Skip JSGlobalProxy. |
| 1834 | if (receiver->IsJSGlobalProxy()) return; |
| 1835 | |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1836 | // Bail out if we didn't find a result. |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 1837 | if (!lookup->IsPropertyOrTransition() || !lookup->IsCacheable()) return; |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1838 | |
| 1839 | // If the property is read-only, we leave the IC in its current |
| 1840 | // state. |
| 1841 | if (lookup->IsReadOnly()) return; |
| 1842 | |
| 1843 | // If the property has a non-field type allowing map transitions |
| 1844 | // where there is extra room in the object, we leave the IC in its |
| 1845 | // current state. |
| 1846 | PropertyType type = lookup->type(); |
| 1847 | |
| 1848 | // Compute the code stub for this store; used for rewriting to |
| 1849 | // monomorphic state and making sure that the code stub is in the |
| 1850 | // stub cache. |
lrn@chromium.org | 303ada7 | 2010-10-27 09:33:13 +0000 | [diff] [blame] | 1851 | MaybeObject* maybe_code = NULL; |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1852 | Object* code = NULL; |
| 1853 | |
| 1854 | switch (type) { |
| 1855 | case FIELD: { |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 1856 | maybe_code = isolate()->stub_cache()->ComputeKeyedStoreField( |
ager@chromium.org | 9ee27ae | 2011-03-02 13:43:26 +0000 | [diff] [blame] | 1857 | *name, *receiver, lookup->GetFieldIndex(), NULL, strict_mode); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1858 | break; |
| 1859 | } |
| 1860 | case MAP_TRANSITION: { |
| 1861 | if (lookup->GetAttributes() == NONE) { |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 1862 | HandleScope scope(isolate()); |
kasperl@chromium.org | 41044eb | 2008-10-06 08:24:46 +0000 | [diff] [blame] | 1863 | ASSERT(type == MAP_TRANSITION); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1864 | Handle<Map> transition(lookup->GetTransitionMap()); |
| 1865 | int index = transition->PropertyIndexFor(*name); |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 1866 | maybe_code = isolate()->stub_cache()->ComputeKeyedStoreField( |
ager@chromium.org | 9ee27ae | 2011-03-02 13:43:26 +0000 | [diff] [blame] | 1867 | *name, *receiver, index, *transition, strict_mode); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1868 | break; |
| 1869 | } |
| 1870 | // fall through. |
| 1871 | } |
| 1872 | default: { |
| 1873 | // Always rewrite to the generic case so that we do not |
| 1874 | // repeatedly try to rewrite. |
ager@chromium.org | 9ee27ae | 2011-03-02 13:43:26 +0000 | [diff] [blame] | 1875 | maybe_code = (strict_mode == kStrictMode) |
| 1876 | ? generic_stub_strict() |
| 1877 | : generic_stub(); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1878 | break; |
| 1879 | } |
| 1880 | } |
| 1881 | |
| 1882 | // If we're unable to compute the stub (not enough memory left), we |
| 1883 | // simply avoid updating the caches. |
lrn@chromium.org | 303ada7 | 2010-10-27 09:33:13 +0000 | [diff] [blame] | 1884 | if (maybe_code == NULL || !maybe_code->ToObject(&code)) return; |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1885 | |
| 1886 | // Patch the call site depending on the state of the cache. Make |
| 1887 | // sure to always rewrite from monomorphic to megamorphic. |
| 1888 | ASSERT(state != MONOMORPHIC_PROTOTYPE_FAILURE); |
| 1889 | if (state == UNINITIALIZED || state == PREMONOMORPHIC) { |
| 1890 | set_target(Code::cast(code)); |
| 1891 | } else if (state == MONOMORPHIC) { |
ager@chromium.org | 9ee27ae | 2011-03-02 13:43:26 +0000 | [diff] [blame] | 1892 | set_target((strict_mode == kStrictMode) |
| 1893 | ? megamorphic_stub_strict() |
| 1894 | : megamorphic_stub()); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1895 | } |
| 1896 | |
| 1897 | #ifdef DEBUG |
| 1898 | TraceIC("KeyedStoreIC", name, state, target()); |
| 1899 | #endif |
| 1900 | } |
| 1901 | |
| 1902 | |
| 1903 | // ---------------------------------------------------------------------------- |
| 1904 | // Static IC stub generators. |
| 1905 | // |
| 1906 | |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 1907 | static JSFunction* CompileFunction(Isolate* isolate, |
| 1908 | JSFunction* function, |
kmillikin@chromium.org | f05f291 | 2010-09-30 10:07:24 +0000 | [diff] [blame] | 1909 | InLoopFlag in_loop) { |
lrn@chromium.org | 1af7e1b | 2010-06-07 11:12:01 +0000 | [diff] [blame] | 1910 | // Compile now with optimization. |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 1911 | HandleScope scope(isolate); |
| 1912 | Handle<JSFunction> function_handle(function, isolate); |
lrn@chromium.org | 1af7e1b | 2010-06-07 11:12:01 +0000 | [diff] [blame] | 1913 | if (in_loop == IN_LOOP) { |
kmillikin@chromium.org | f05f291 | 2010-09-30 10:07:24 +0000 | [diff] [blame] | 1914 | CompileLazyInLoop(function_handle, CLEAR_EXCEPTION); |
lrn@chromium.org | 1af7e1b | 2010-06-07 11:12:01 +0000 | [diff] [blame] | 1915 | } else { |
kmillikin@chromium.org | f05f291 | 2010-09-30 10:07:24 +0000 | [diff] [blame] | 1916 | CompileLazy(function_handle, CLEAR_EXCEPTION); |
lrn@chromium.org | 1af7e1b | 2010-06-07 11:12:01 +0000 | [diff] [blame] | 1917 | } |
kmillikin@chromium.org | f05f291 | 2010-09-30 10:07:24 +0000 | [diff] [blame] | 1918 | return *function_handle; |
lrn@chromium.org | 1af7e1b | 2010-06-07 11:12:01 +0000 | [diff] [blame] | 1919 | } |
| 1920 | |
| 1921 | |
| 1922 | // Used from ic-<arch>.cc. |
kmillikin@chromium.org | c36ce6e | 2011-04-04 08:25:31 +0000 | [diff] [blame] | 1923 | RUNTIME_FUNCTION(MaybeObject*, CallIC_Miss) { |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1924 | NoHandleAllocation na; |
| 1925 | ASSERT(args.length() == 2); |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 1926 | CallIC ic(isolate); |
ager@chromium.org | ce5e87b | 2010-03-10 10:24:18 +0000 | [diff] [blame] | 1927 | IC::State state = IC::StateFrom(ic.target(), args[0], args[1]); |
erik.corry@gmail.com | 0511e24 | 2011-01-19 11:11:08 +0000 | [diff] [blame] | 1928 | Code::ExtraICState extra_ic_state = ic.target()->extra_ic_state(); |
| 1929 | MaybeObject* maybe_result = ic.LoadFunction(state, |
| 1930 | extra_ic_state, |
| 1931 | args.at<Object>(0), |
| 1932 | args.at<String>(1)); |
lrn@chromium.org | 303ada7 | 2010-10-27 09:33:13 +0000 | [diff] [blame] | 1933 | Object* result; |
erik.corry@gmail.com | 0511e24 | 2011-01-19 11:11:08 +0000 | [diff] [blame] | 1934 | if (!maybe_result->ToObject(&result)) return maybe_result; |
ager@chromium.org | 3bf7b91 | 2008-11-17 09:09:45 +0000 | [diff] [blame] | 1935 | |
kasperl@chromium.org | 71affb5 | 2009-05-26 05:44:31 +0000 | [diff] [blame] | 1936 | // The first time the inline cache is updated may be the first time the |
| 1937 | // function it references gets called. If the function was lazily compiled |
| 1938 | // then the first call will trigger a compilation. We check for this case |
| 1939 | // and we do the compilation immediately, instead of waiting for the stub |
| 1940 | // currently attached to the JSFunction object to trigger compilation. We |
| 1941 | // do this in the case where we know that the inline cache is inside a loop, |
| 1942 | // because then we know that we want to optimize the function. |
| 1943 | if (!result->IsJSFunction() || JSFunction::cast(result)->is_compiled()) { |
| 1944 | return result; |
| 1945 | } |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 1946 | return CompileFunction(isolate, |
| 1947 | JSFunction::cast(result), |
| 1948 | ic.target()->ic_in_loop()); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1949 | } |
| 1950 | |
| 1951 | |
lrn@chromium.org | 1af7e1b | 2010-06-07 11:12:01 +0000 | [diff] [blame] | 1952 | // Used from ic-<arch>.cc. |
kmillikin@chromium.org | c36ce6e | 2011-04-04 08:25:31 +0000 | [diff] [blame] | 1953 | RUNTIME_FUNCTION(MaybeObject*, KeyedCallIC_Miss) { |
lrn@chromium.org | 1af7e1b | 2010-06-07 11:12:01 +0000 | [diff] [blame] | 1954 | NoHandleAllocation na; |
| 1955 | ASSERT(args.length() == 2); |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 1956 | KeyedCallIC ic(isolate); |
lrn@chromium.org | 1af7e1b | 2010-06-07 11:12:01 +0000 | [diff] [blame] | 1957 | IC::State state = IC::StateFrom(ic.target(), args[0], args[1]); |
lrn@chromium.org | 303ada7 | 2010-10-27 09:33:13 +0000 | [diff] [blame] | 1958 | Object* result; |
| 1959 | { MaybeObject* maybe_result = |
lrn@chromium.org | 1af7e1b | 2010-06-07 11:12:01 +0000 | [diff] [blame] | 1960 | ic.LoadFunction(state, args.at<Object>(0), args.at<Object>(1)); |
lrn@chromium.org | 303ada7 | 2010-10-27 09:33:13 +0000 | [diff] [blame] | 1961 | if (!maybe_result->ToObject(&result)) return maybe_result; |
| 1962 | } |
lrn@chromium.org | 1af7e1b | 2010-06-07 11:12:01 +0000 | [diff] [blame] | 1963 | |
| 1964 | if (!result->IsJSFunction() || JSFunction::cast(result)->is_compiled()) { |
| 1965 | return result; |
| 1966 | } |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 1967 | return CompileFunction(isolate, |
| 1968 | JSFunction::cast(result), |
| 1969 | ic.target()->ic_in_loop()); |
lrn@chromium.org | 1af7e1b | 2010-06-07 11:12:01 +0000 | [diff] [blame] | 1970 | } |
| 1971 | |
| 1972 | |
| 1973 | // Used from ic-<arch>.cc. |
kmillikin@chromium.org | c36ce6e | 2011-04-04 08:25:31 +0000 | [diff] [blame] | 1974 | RUNTIME_FUNCTION(MaybeObject*, LoadIC_Miss) { |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1975 | NoHandleAllocation na; |
| 1976 | ASSERT(args.length() == 2); |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 1977 | LoadIC ic(isolate); |
ager@chromium.org | ce5e87b | 2010-03-10 10:24:18 +0000 | [diff] [blame] | 1978 | IC::State state = IC::StateFrom(ic.target(), args[0], args[1]); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1979 | return ic.Load(state, args.at<Object>(0), args.at<String>(1)); |
| 1980 | } |
| 1981 | |
| 1982 | |
lrn@chromium.org | 1af7e1b | 2010-06-07 11:12:01 +0000 | [diff] [blame] | 1983 | // Used from ic-<arch>.cc |
kmillikin@chromium.org | c36ce6e | 2011-04-04 08:25:31 +0000 | [diff] [blame] | 1984 | RUNTIME_FUNCTION(MaybeObject*, KeyedLoadIC_Miss) { |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1985 | NoHandleAllocation na; |
| 1986 | ASSERT(args.length() == 2); |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 1987 | KeyedLoadIC ic(isolate); |
ager@chromium.org | ce5e87b | 2010-03-10 10:24:18 +0000 | [diff] [blame] | 1988 | IC::State state = IC::StateFrom(ic.target(), args[0], args[1]); |
ager@chromium.org | ea91cc5 | 2011-05-23 06:06:11 +0000 | [diff] [blame] | 1989 | return ic.Load(state, args.at<Object>(0), args.at<Object>(1), false); |
| 1990 | } |
| 1991 | |
| 1992 | |
| 1993 | RUNTIME_FUNCTION(MaybeObject*, KeyedLoadIC_MissForceGeneric) { |
| 1994 | NoHandleAllocation na; |
| 1995 | ASSERT(args.length() == 2); |
| 1996 | KeyedLoadIC ic(isolate); |
| 1997 | IC::State state = IC::StateFrom(ic.target(), args[0], args[1]); |
| 1998 | return ic.Load(state, args.at<Object>(0), args.at<Object>(1), true); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1999 | } |
| 2000 | |
| 2001 | |
lrn@chromium.org | 1af7e1b | 2010-06-07 11:12:01 +0000 | [diff] [blame] | 2002 | // Used from ic-<arch>.cc. |
kmillikin@chromium.org | c36ce6e | 2011-04-04 08:25:31 +0000 | [diff] [blame] | 2003 | RUNTIME_FUNCTION(MaybeObject*, StoreIC_Miss) { |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 2004 | NoHandleAllocation na; |
| 2005 | ASSERT(args.length() == 3); |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 2006 | StoreIC ic(isolate); |
ager@chromium.org | ce5e87b | 2010-03-10 10:24:18 +0000 | [diff] [blame] | 2007 | IC::State state = IC::StateFrom(ic.target(), args[0], args[1]); |
sgjesse@chromium.org | 496c03a | 2011-02-14 12:05:43 +0000 | [diff] [blame] | 2008 | Code::ExtraICState extra_ic_state = ic.target()->extra_ic_state(); |
ager@chromium.org | 9ee27ae | 2011-03-02 13:43:26 +0000 | [diff] [blame] | 2009 | return ic.Store(state, |
| 2010 | static_cast<StrictModeFlag>(extra_ic_state & kStrictMode), |
| 2011 | args.at<Object>(0), |
| 2012 | args.at<String>(1), |
| 2013 | args.at<Object>(2)); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 2014 | } |
| 2015 | |
| 2016 | |
kmillikin@chromium.org | c36ce6e | 2011-04-04 08:25:31 +0000 | [diff] [blame] | 2017 | RUNTIME_FUNCTION(MaybeObject*, StoreIC_ArrayLength) { |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 2018 | NoHandleAllocation nha; |
| 2019 | |
| 2020 | ASSERT(args.length() == 2); |
| 2021 | JSObject* receiver = JSObject::cast(args[0]); |
| 2022 | Object* len = args[1]; |
| 2023 | |
lrn@chromium.org | 303ada7 | 2010-10-27 09:33:13 +0000 | [diff] [blame] | 2024 | // The generated code should filter out non-Smis before we get here. |
| 2025 | ASSERT(len->IsSmi()); |
| 2026 | |
| 2027 | Object* result; |
| 2028 | { MaybeObject* maybe_result = receiver->SetElementsLength(len); |
| 2029 | if (!maybe_result->ToObject(&result)) return maybe_result; |
| 2030 | } |
ager@chromium.org | ce5e87b | 2010-03-10 10:24:18 +0000 | [diff] [blame] | 2031 | return len; |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 2032 | } |
| 2033 | |
| 2034 | |
kasperl@chromium.org | 41044eb | 2008-10-06 08:24:46 +0000 | [diff] [blame] | 2035 | // Extend storage is called in a store inline cache when |
| 2036 | // it is necessary to extend the properties array of a |
| 2037 | // JSObject. |
kmillikin@chromium.org | c36ce6e | 2011-04-04 08:25:31 +0000 | [diff] [blame] | 2038 | RUNTIME_FUNCTION(MaybeObject*, SharedStoreIC_ExtendStorage) { |
kasperl@chromium.org | 41044eb | 2008-10-06 08:24:46 +0000 | [diff] [blame] | 2039 | NoHandleAllocation na; |
| 2040 | ASSERT(args.length() == 3); |
| 2041 | |
| 2042 | // Convert the parameters |
| 2043 | JSObject* object = JSObject::cast(args[0]); |
| 2044 | Map* transition = Map::cast(args[1]); |
| 2045 | Object* value = args[2]; |
| 2046 | |
| 2047 | // Check the object has run out out property space. |
| 2048 | ASSERT(object->HasFastProperties()); |
| 2049 | ASSERT(object->map()->unused_property_fields() == 0); |
| 2050 | |
| 2051 | // Expand the properties array. |
| 2052 | FixedArray* old_storage = object->properties(); |
| 2053 | int new_unused = transition->unused_property_fields(); |
| 2054 | int new_size = old_storage->length() + new_unused + 1; |
lrn@chromium.org | 303ada7 | 2010-10-27 09:33:13 +0000 | [diff] [blame] | 2055 | Object* result; |
| 2056 | { MaybeObject* maybe_result = old_storage->CopySize(new_size); |
| 2057 | if (!maybe_result->ToObject(&result)) return maybe_result; |
| 2058 | } |
kasperl@chromium.org | 41044eb | 2008-10-06 08:24:46 +0000 | [diff] [blame] | 2059 | FixedArray* new_storage = FixedArray::cast(result); |
| 2060 | new_storage->set(old_storage->length(), value); |
| 2061 | |
ager@chromium.org | 3291210 | 2009-01-16 10:38:43 +0000 | [diff] [blame] | 2062 | // Set the new property value and do the map transition. |
kasperl@chromium.org | 41044eb | 2008-10-06 08:24:46 +0000 | [diff] [blame] | 2063 | object->set_properties(new_storage); |
| 2064 | object->set_map(transition); |
| 2065 | |
| 2066 | // Return the stored value. |
| 2067 | return value; |
| 2068 | } |
| 2069 | |
| 2070 | |
lrn@chromium.org | 1af7e1b | 2010-06-07 11:12:01 +0000 | [diff] [blame] | 2071 | // Used from ic-<arch>.cc. |
kmillikin@chromium.org | c36ce6e | 2011-04-04 08:25:31 +0000 | [diff] [blame] | 2072 | RUNTIME_FUNCTION(MaybeObject*, KeyedStoreIC_Miss) { |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 2073 | NoHandleAllocation na; |
| 2074 | ASSERT(args.length() == 3); |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 2075 | KeyedStoreIC ic(isolate); |
ager@chromium.org | ce5e87b | 2010-03-10 10:24:18 +0000 | [diff] [blame] | 2076 | IC::State state = IC::StateFrom(ic.target(), args[0], args[1]); |
ager@chromium.org | 9ee27ae | 2011-03-02 13:43:26 +0000 | [diff] [blame] | 2077 | Code::ExtraICState extra_ic_state = ic.target()->extra_ic_state(); |
| 2078 | return ic.Store(state, |
| 2079 | static_cast<StrictModeFlag>(extra_ic_state & kStrictMode), |
| 2080 | args.at<Object>(0), |
| 2081 | args.at<Object>(1), |
ager@chromium.org | ea91cc5 | 2011-05-23 06:06:11 +0000 | [diff] [blame] | 2082 | args.at<Object>(2), |
| 2083 | false); |
| 2084 | } |
| 2085 | |
| 2086 | |
| 2087 | RUNTIME_FUNCTION(MaybeObject*, KeyedStoreIC_Slow) { |
| 2088 | NoHandleAllocation na; |
| 2089 | ASSERT(args.length() == 3); |
| 2090 | KeyedStoreIC ic(isolate); |
| 2091 | Code::ExtraICState extra_ic_state = ic.target()->extra_ic_state(); |
| 2092 | Handle<Object> object = args.at<Object>(0); |
| 2093 | Handle<Object> key = args.at<Object>(1); |
| 2094 | Handle<Object> value = args.at<Object>(2); |
| 2095 | StrictModeFlag strict_mode = |
| 2096 | static_cast<StrictModeFlag>(extra_ic_state & kStrictMode); |
| 2097 | return Runtime::SetObjectProperty(isolate, |
| 2098 | object, |
| 2099 | key, |
| 2100 | value, |
| 2101 | NONE, |
| 2102 | strict_mode); |
| 2103 | } |
| 2104 | |
| 2105 | |
| 2106 | RUNTIME_FUNCTION(MaybeObject*, KeyedStoreIC_MissForceGeneric) { |
| 2107 | NoHandleAllocation na; |
| 2108 | ASSERT(args.length() == 3); |
| 2109 | KeyedStoreIC ic(isolate); |
| 2110 | IC::State state = IC::StateFrom(ic.target(), args[0], args[1]); |
| 2111 | Code::ExtraICState extra_ic_state = ic.target()->extra_ic_state(); |
| 2112 | return ic.Store(state, |
| 2113 | static_cast<StrictModeFlag>(extra_ic_state & kStrictMode), |
| 2114 | args.at<Object>(0), |
| 2115 | args.at<Object>(1), |
| 2116 | args.at<Object>(2), |
| 2117 | true); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 2118 | } |
| 2119 | |
| 2120 | |
danno@chromium.org | 40cb878 | 2011-05-25 07:58:50 +0000 | [diff] [blame] | 2121 | void UnaryOpIC::patch(Code* code) { |
sgjesse@chromium.org | 8e8294a | 2011-05-02 14:30:53 +0000 | [diff] [blame] | 2122 | set_target(code); |
| 2123 | } |
| 2124 | |
| 2125 | |
danno@chromium.org | 40cb878 | 2011-05-25 07:58:50 +0000 | [diff] [blame] | 2126 | const char* UnaryOpIC::GetName(TypeInfo type_info) { |
sgjesse@chromium.org | 8e8294a | 2011-05-02 14:30:53 +0000 | [diff] [blame] | 2127 | switch (type_info) { |
| 2128 | case UNINITIALIZED: return "Uninitialized"; |
| 2129 | case SMI: return "Smi"; |
| 2130 | case HEAP_NUMBER: return "HeapNumbers"; |
| 2131 | case GENERIC: return "Generic"; |
| 2132 | default: return "Invalid"; |
| 2133 | } |
| 2134 | } |
| 2135 | |
| 2136 | |
danno@chromium.org | 40cb878 | 2011-05-25 07:58:50 +0000 | [diff] [blame] | 2137 | UnaryOpIC::State UnaryOpIC::ToState(TypeInfo type_info) { |
sgjesse@chromium.org | 8e8294a | 2011-05-02 14:30:53 +0000 | [diff] [blame] | 2138 | switch (type_info) { |
| 2139 | case UNINITIALIZED: |
| 2140 | return ::v8::internal::UNINITIALIZED; |
| 2141 | case SMI: |
| 2142 | case HEAP_NUMBER: |
| 2143 | return MONOMORPHIC; |
| 2144 | case GENERIC: |
| 2145 | return MEGAMORPHIC; |
| 2146 | } |
| 2147 | UNREACHABLE(); |
| 2148 | return ::v8::internal::UNINITIALIZED; |
| 2149 | } |
| 2150 | |
danno@chromium.org | 40cb878 | 2011-05-25 07:58:50 +0000 | [diff] [blame] | 2151 | UnaryOpIC::TypeInfo UnaryOpIC::GetTypeInfo(Handle<Object> operand) { |
sgjesse@chromium.org | 8e8294a | 2011-05-02 14:30:53 +0000 | [diff] [blame] | 2152 | ::v8::internal::TypeInfo operand_type = |
| 2153 | ::v8::internal::TypeInfo::TypeFromValue(operand); |
| 2154 | if (operand_type.IsSmi()) { |
| 2155 | return SMI; |
| 2156 | } else if (operand_type.IsNumber()) { |
| 2157 | return HEAP_NUMBER; |
| 2158 | } else { |
| 2159 | return GENERIC; |
| 2160 | } |
| 2161 | } |
| 2162 | |
| 2163 | |
danno@chromium.org | 40cb878 | 2011-05-25 07:58:50 +0000 | [diff] [blame] | 2164 | UnaryOpIC::TypeInfo UnaryOpIC::ComputeNewType( |
| 2165 | UnaryOpIC::TypeInfo current_type, |
| 2166 | UnaryOpIC::TypeInfo previous_type) { |
| 2167 | switch (previous_type) { |
| 2168 | case UnaryOpIC::UNINITIALIZED: |
| 2169 | return current_type; |
| 2170 | case UnaryOpIC::SMI: |
| 2171 | return (current_type == UnaryOpIC::GENERIC) |
| 2172 | ? UnaryOpIC::GENERIC |
| 2173 | : UnaryOpIC::HEAP_NUMBER; |
| 2174 | case UnaryOpIC::HEAP_NUMBER: |
| 2175 | return UnaryOpIC::GENERIC; |
| 2176 | case UnaryOpIC::GENERIC: |
ager@chromium.org | ea91cc5 | 2011-05-23 06:06:11 +0000 | [diff] [blame] | 2177 | // We should never do patching if we are in GENERIC state. |
| 2178 | UNREACHABLE(); |
danno@chromium.org | 40cb878 | 2011-05-25 07:58:50 +0000 | [diff] [blame] | 2179 | return UnaryOpIC::GENERIC; |
ager@chromium.org | ea91cc5 | 2011-05-23 06:06:11 +0000 | [diff] [blame] | 2180 | } |
| 2181 | UNREACHABLE(); |
danno@chromium.org | 40cb878 | 2011-05-25 07:58:50 +0000 | [diff] [blame] | 2182 | return UnaryOpIC::GENERIC; |
sgjesse@chromium.org | 8e8294a | 2011-05-02 14:30:53 +0000 | [diff] [blame] | 2183 | } |
| 2184 | |
| 2185 | |
danno@chromium.org | 40cb878 | 2011-05-25 07:58:50 +0000 | [diff] [blame] | 2186 | void BinaryOpIC::patch(Code* code) { |
kasperl@chromium.org | a555126 | 2010-12-07 12:49:48 +0000 | [diff] [blame] | 2187 | set_target(code); |
| 2188 | } |
| 2189 | |
| 2190 | |
danno@chromium.org | 40cb878 | 2011-05-25 07:58:50 +0000 | [diff] [blame] | 2191 | const char* BinaryOpIC::GetName(TypeInfo type_info) { |
kasperl@chromium.org | a555126 | 2010-12-07 12:49:48 +0000 | [diff] [blame] | 2192 | switch (type_info) { |
| 2193 | case UNINITIALIZED: return "Uninitialized"; |
| 2194 | case SMI: return "SMI"; |
| 2195 | case INT32: return "Int32s"; |
| 2196 | case HEAP_NUMBER: return "HeapNumbers"; |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 2197 | case ODDBALL: return "Oddball"; |
danno@chromium.org | 160a7b0 | 2011-04-18 15:51:38 +0000 | [diff] [blame] | 2198 | case BOTH_STRING: return "BothStrings"; |
kasperl@chromium.org | a555126 | 2010-12-07 12:49:48 +0000 | [diff] [blame] | 2199 | case STRING: return "Strings"; |
| 2200 | case GENERIC: return "Generic"; |
| 2201 | default: return "Invalid"; |
| 2202 | } |
| 2203 | } |
| 2204 | |
| 2205 | |
danno@chromium.org | 40cb878 | 2011-05-25 07:58:50 +0000 | [diff] [blame] | 2206 | BinaryOpIC::State BinaryOpIC::ToState(TypeInfo type_info) { |
kasperl@chromium.org | a555126 | 2010-12-07 12:49:48 +0000 | [diff] [blame] | 2207 | switch (type_info) { |
| 2208 | case UNINITIALIZED: |
| 2209 | return ::v8::internal::UNINITIALIZED; |
| 2210 | case SMI: |
| 2211 | case INT32: |
| 2212 | case HEAP_NUMBER: |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 2213 | case ODDBALL: |
danno@chromium.org | 160a7b0 | 2011-04-18 15:51:38 +0000 | [diff] [blame] | 2214 | case BOTH_STRING: |
kasperl@chromium.org | a555126 | 2010-12-07 12:49:48 +0000 | [diff] [blame] | 2215 | case STRING: |
| 2216 | return MONOMORPHIC; |
| 2217 | case GENERIC: |
| 2218 | return MEGAMORPHIC; |
| 2219 | } |
| 2220 | UNREACHABLE(); |
| 2221 | return ::v8::internal::UNINITIALIZED; |
| 2222 | } |
| 2223 | |
| 2224 | |
danno@chromium.org | 40cb878 | 2011-05-25 07:58:50 +0000 | [diff] [blame] | 2225 | BinaryOpIC::TypeInfo BinaryOpIC::JoinTypes(BinaryOpIC::TypeInfo x, |
| 2226 | BinaryOpIC::TypeInfo y) { |
kasperl@chromium.org | a555126 | 2010-12-07 12:49:48 +0000 | [diff] [blame] | 2227 | if (x == UNINITIALIZED) return y; |
| 2228 | if (y == UNINITIALIZED) return x; |
danno@chromium.org | 160a7b0 | 2011-04-18 15:51:38 +0000 | [diff] [blame] | 2229 | if (x == y) return x; |
| 2230 | if (x == BOTH_STRING && y == STRING) return STRING; |
| 2231 | if (x == STRING && y == BOTH_STRING) return STRING; |
| 2232 | if (x == STRING || x == BOTH_STRING || y == STRING || y == BOTH_STRING) { |
| 2233 | return GENERIC; |
| 2234 | } |
| 2235 | if (x > y) return x; |
kasperl@chromium.org | a555126 | 2010-12-07 12:49:48 +0000 | [diff] [blame] | 2236 | return y; |
| 2237 | } |
| 2238 | |
danno@chromium.org | 160a7b0 | 2011-04-18 15:51:38 +0000 | [diff] [blame] | 2239 | |
danno@chromium.org | 40cb878 | 2011-05-25 07:58:50 +0000 | [diff] [blame] | 2240 | BinaryOpIC::TypeInfo BinaryOpIC::GetTypeInfo(Handle<Object> left, |
| 2241 | Handle<Object> right) { |
kasperl@chromium.org | a555126 | 2010-12-07 12:49:48 +0000 | [diff] [blame] | 2242 | ::v8::internal::TypeInfo left_type = |
| 2243 | ::v8::internal::TypeInfo::TypeFromValue(left); |
| 2244 | ::v8::internal::TypeInfo right_type = |
| 2245 | ::v8::internal::TypeInfo::TypeFromValue(right); |
| 2246 | |
| 2247 | if (left_type.IsSmi() && right_type.IsSmi()) { |
| 2248 | return SMI; |
| 2249 | } |
| 2250 | |
| 2251 | if (left_type.IsInteger32() && right_type.IsInteger32()) { |
ricow@chromium.org | 83aa549 | 2011-02-07 12:42:56 +0000 | [diff] [blame] | 2252 | // Platforms with 32-bit Smis have no distinct INT32 type. |
| 2253 | if (kSmiValueSize == 32) return SMI; |
kasperl@chromium.org | a555126 | 2010-12-07 12:49:48 +0000 | [diff] [blame] | 2254 | return INT32; |
| 2255 | } |
| 2256 | |
| 2257 | if (left_type.IsNumber() && right_type.IsNumber()) { |
| 2258 | return HEAP_NUMBER; |
| 2259 | } |
| 2260 | |
danno@chromium.org | 160a7b0 | 2011-04-18 15:51:38 +0000 | [diff] [blame] | 2261 | // Patching for fast string ADD makes sense even if only one of the |
| 2262 | // arguments is a string. |
| 2263 | if (left_type.IsString()) { |
| 2264 | return right_type.IsString() ? BOTH_STRING : STRING; |
| 2265 | } else if (right_type.IsString()) { |
kasperl@chromium.org | a555126 | 2010-12-07 12:49:48 +0000 | [diff] [blame] | 2266 | return STRING; |
| 2267 | } |
| 2268 | |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 2269 | // Check for oddball objects. |
| 2270 | if (left->IsUndefined() && right->IsNumber()) return ODDBALL; |
| 2271 | if (left->IsNumber() && right->IsUndefined()) return ODDBALL; |
| 2272 | |
kasperl@chromium.org | a555126 | 2010-12-07 12:49:48 +0000 | [diff] [blame] | 2273 | return GENERIC; |
| 2274 | } |
| 2275 | |
| 2276 | |
danno@chromium.org | 40cb878 | 2011-05-25 07:58:50 +0000 | [diff] [blame] | 2277 | RUNTIME_FUNCTION(MaybeObject*, UnaryOp_Patch) { |
sgjesse@chromium.org | 8e8294a | 2011-05-02 14:30:53 +0000 | [diff] [blame] | 2278 | ASSERT(args.length() == 4); |
| 2279 | |
| 2280 | HandleScope scope(isolate); |
| 2281 | Handle<Object> operand = args.at<Object>(0); |
ricow@chromium.org | 4f693d6 | 2011-07-04 14:01:31 +0000 | [diff] [blame] | 2282 | Token::Value op = static_cast<Token::Value>(args.smi_at(1)); |
| 2283 | UnaryOverwriteMode mode = static_cast<UnaryOverwriteMode>(args.smi_at(2)); |
danno@chromium.org | 40cb878 | 2011-05-25 07:58:50 +0000 | [diff] [blame] | 2284 | UnaryOpIC::TypeInfo previous_type = |
svenpanne@chromium.org | 6d786c9 | 2011-06-15 10:58:27 +0000 | [diff] [blame] | 2285 | static_cast<UnaryOpIC::TypeInfo>(args.smi_at(3)); |
sgjesse@chromium.org | 8e8294a | 2011-05-02 14:30:53 +0000 | [diff] [blame] | 2286 | |
danno@chromium.org | 40cb878 | 2011-05-25 07:58:50 +0000 | [diff] [blame] | 2287 | UnaryOpIC::TypeInfo type = UnaryOpIC::GetTypeInfo(operand); |
| 2288 | type = UnaryOpIC::ComputeNewType(type, previous_type); |
sgjesse@chromium.org | 8e8294a | 2011-05-02 14:30:53 +0000 | [diff] [blame] | 2289 | |
ricow@chromium.org | 4f693d6 | 2011-07-04 14:01:31 +0000 | [diff] [blame] | 2290 | UnaryOpStub stub(op, mode, type); |
svenpanne@chromium.org | 6d786c9 | 2011-06-15 10:58:27 +0000 | [diff] [blame] | 2291 | Handle<Code> code = stub.GetCode(); |
sgjesse@chromium.org | 8e8294a | 2011-05-02 14:30:53 +0000 | [diff] [blame] | 2292 | if (!code.is_null()) { |
| 2293 | if (FLAG_trace_ic) { |
danno@chromium.org | 40cb878 | 2011-05-25 07:58:50 +0000 | [diff] [blame] | 2294 | PrintF("[UnaryOpIC (%s->%s)#%s]\n", |
| 2295 | UnaryOpIC::GetName(previous_type), |
| 2296 | UnaryOpIC::GetName(type), |
sgjesse@chromium.org | 8e8294a | 2011-05-02 14:30:53 +0000 | [diff] [blame] | 2297 | Token::Name(op)); |
| 2298 | } |
danno@chromium.org | 40cb878 | 2011-05-25 07:58:50 +0000 | [diff] [blame] | 2299 | UnaryOpIC ic(isolate); |
sgjesse@chromium.org | 8e8294a | 2011-05-02 14:30:53 +0000 | [diff] [blame] | 2300 | ic.patch(*code); |
| 2301 | } |
| 2302 | |
| 2303 | Handle<JSBuiltinsObject> builtins = Handle<JSBuiltinsObject>( |
| 2304 | isolate->thread_local_top()->context_->builtins(), isolate); |
| 2305 | Object* builtin = NULL; // Initialization calms down the compiler. |
| 2306 | switch (op) { |
| 2307 | case Token::SUB: |
| 2308 | builtin = builtins->javascript_builtin(Builtins::UNARY_MINUS); |
| 2309 | break; |
| 2310 | case Token::BIT_NOT: |
| 2311 | builtin = builtins->javascript_builtin(Builtins::BIT_NOT); |
| 2312 | break; |
| 2313 | default: |
| 2314 | UNREACHABLE(); |
| 2315 | } |
| 2316 | |
| 2317 | Handle<JSFunction> builtin_function(JSFunction::cast(builtin), isolate); |
| 2318 | |
| 2319 | bool caught_exception; |
| 2320 | Handle<Object> result = Execution::Call(builtin_function, operand, 0, NULL, |
| 2321 | &caught_exception); |
| 2322 | if (caught_exception) { |
| 2323 | return Failure::Exception(); |
| 2324 | } |
| 2325 | return *result; |
| 2326 | } |
| 2327 | |
danno@chromium.org | 40cb878 | 2011-05-25 07:58:50 +0000 | [diff] [blame] | 2328 | RUNTIME_FUNCTION(MaybeObject*, BinaryOp_Patch) { |
kasperl@chromium.org | a555126 | 2010-12-07 12:49:48 +0000 | [diff] [blame] | 2329 | ASSERT(args.length() == 5); |
| 2330 | |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 2331 | HandleScope scope(isolate); |
kasperl@chromium.org | a555126 | 2010-12-07 12:49:48 +0000 | [diff] [blame] | 2332 | Handle<Object> left = args.at<Object>(0); |
| 2333 | Handle<Object> right = args.at<Object>(1); |
svenpanne@chromium.org | 6d786c9 | 2011-06-15 10:58:27 +0000 | [diff] [blame] | 2334 | int key = args.smi_at(2); |
| 2335 | Token::Value op = static_cast<Token::Value>(args.smi_at(3)); |
danno@chromium.org | 40cb878 | 2011-05-25 07:58:50 +0000 | [diff] [blame] | 2336 | BinaryOpIC::TypeInfo previous_type = |
svenpanne@chromium.org | 6d786c9 | 2011-06-15 10:58:27 +0000 | [diff] [blame] | 2337 | static_cast<BinaryOpIC::TypeInfo>(args.smi_at(4)); |
kasperl@chromium.org | a555126 | 2010-12-07 12:49:48 +0000 | [diff] [blame] | 2338 | |
danno@chromium.org | 40cb878 | 2011-05-25 07:58:50 +0000 | [diff] [blame] | 2339 | BinaryOpIC::TypeInfo type = BinaryOpIC::GetTypeInfo(left, right); |
| 2340 | type = BinaryOpIC::JoinTypes(type, previous_type); |
| 2341 | BinaryOpIC::TypeInfo result_type = BinaryOpIC::UNINITIALIZED; |
| 2342 | if ((type == BinaryOpIC::STRING || type == BinaryOpIC::BOTH_STRING) && |
danno@chromium.org | 160a7b0 | 2011-04-18 15:51:38 +0000 | [diff] [blame] | 2343 | op != Token::ADD) { |
danno@chromium.org | 40cb878 | 2011-05-25 07:58:50 +0000 | [diff] [blame] | 2344 | type = BinaryOpIC::GENERIC; |
kasperl@chromium.org | a555126 | 2010-12-07 12:49:48 +0000 | [diff] [blame] | 2345 | } |
danno@chromium.org | 40cb878 | 2011-05-25 07:58:50 +0000 | [diff] [blame] | 2346 | if (type == BinaryOpIC::SMI && previous_type == BinaryOpIC::SMI) { |
ager@chromium.org | ea91cc5 | 2011-05-23 06:06:11 +0000 | [diff] [blame] | 2347 | if (op == Token::DIV || |
| 2348 | op == Token::MUL || |
| 2349 | op == Token::SHR || |
| 2350 | kSmiValueSize == 32) { |
kasperl@chromium.org | a555126 | 2010-12-07 12:49:48 +0000 | [diff] [blame] | 2351 | // Arithmetic on two Smi inputs has yielded a heap number. |
| 2352 | // That is the only way to get here from the Smi stub. |
ricow@chromium.org | 83aa549 | 2011-02-07 12:42:56 +0000 | [diff] [blame] | 2353 | // With 32-bit Smis, all overflows give heap numbers, but with |
| 2354 | // 31-bit Smis, most operations overflow to int32 results. |
danno@chromium.org | 40cb878 | 2011-05-25 07:58:50 +0000 | [diff] [blame] | 2355 | result_type = BinaryOpIC::HEAP_NUMBER; |
kasperl@chromium.org | a555126 | 2010-12-07 12:49:48 +0000 | [diff] [blame] | 2356 | } else { |
| 2357 | // Other operations on SMIs that overflow yield int32s. |
danno@chromium.org | 40cb878 | 2011-05-25 07:58:50 +0000 | [diff] [blame] | 2358 | result_type = BinaryOpIC::INT32; |
kasperl@chromium.org | a555126 | 2010-12-07 12:49:48 +0000 | [diff] [blame] | 2359 | } |
| 2360 | } |
danno@chromium.org | 40cb878 | 2011-05-25 07:58:50 +0000 | [diff] [blame] | 2361 | if (type == BinaryOpIC::INT32 && previous_type == BinaryOpIC::INT32) { |
kasperl@chromium.org | a555126 | 2010-12-07 12:49:48 +0000 | [diff] [blame] | 2362 | // We must be here because an operation on two INT32 types overflowed. |
danno@chromium.org | 40cb878 | 2011-05-25 07:58:50 +0000 | [diff] [blame] | 2363 | result_type = BinaryOpIC::HEAP_NUMBER; |
kasperl@chromium.org | a555126 | 2010-12-07 12:49:48 +0000 | [diff] [blame] | 2364 | } |
| 2365 | |
svenpanne@chromium.org | 6d786c9 | 2011-06-15 10:58:27 +0000 | [diff] [blame] | 2366 | BinaryOpStub stub(key, type, result_type); |
| 2367 | Handle<Code> code = stub.GetCode(); |
kasperl@chromium.org | a555126 | 2010-12-07 12:49:48 +0000 | [diff] [blame] | 2368 | if (!code.is_null()) { |
kasperl@chromium.org | a555126 | 2010-12-07 12:49:48 +0000 | [diff] [blame] | 2369 | if (FLAG_trace_ic) { |
danno@chromium.org | 40cb878 | 2011-05-25 07:58:50 +0000 | [diff] [blame] | 2370 | PrintF("[BinaryOpIC (%s->(%s->%s))#%s]\n", |
| 2371 | BinaryOpIC::GetName(previous_type), |
| 2372 | BinaryOpIC::GetName(type), |
| 2373 | BinaryOpIC::GetName(result_type), |
kasperl@chromium.org | a555126 | 2010-12-07 12:49:48 +0000 | [diff] [blame] | 2374 | Token::Name(op)); |
| 2375 | } |
danno@chromium.org | 40cb878 | 2011-05-25 07:58:50 +0000 | [diff] [blame] | 2376 | BinaryOpIC ic(isolate); |
ager@chromium.org | 378b34e | 2011-01-28 08:04:38 +0000 | [diff] [blame] | 2377 | ic.patch(*code); |
ager@chromium.org | 5f0c45f | 2010-12-17 08:51:21 +0000 | [diff] [blame] | 2378 | |
| 2379 | // Activate inlined smi code. |
danno@chromium.org | 40cb878 | 2011-05-25 07:58:50 +0000 | [diff] [blame] | 2380 | if (previous_type == BinaryOpIC::UNINITIALIZED) { |
ager@chromium.org | 5f0c45f | 2010-12-17 08:51:21 +0000 | [diff] [blame] | 2381 | PatchInlinedSmiCode(ic.address()); |
| 2382 | } |
kasperl@chromium.org | a555126 | 2010-12-07 12:49:48 +0000 | [diff] [blame] | 2383 | } |
| 2384 | |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 2385 | Handle<JSBuiltinsObject> builtins = Handle<JSBuiltinsObject>( |
| 2386 | isolate->thread_local_top()->context_->builtins(), isolate); |
kasperl@chromium.org | a555126 | 2010-12-07 12:49:48 +0000 | [diff] [blame] | 2387 | Object* builtin = NULL; // Initialization calms down the compiler. |
| 2388 | switch (op) { |
| 2389 | case Token::ADD: |
| 2390 | builtin = builtins->javascript_builtin(Builtins::ADD); |
| 2391 | break; |
| 2392 | case Token::SUB: |
| 2393 | builtin = builtins->javascript_builtin(Builtins::SUB); |
| 2394 | break; |
| 2395 | case Token::MUL: |
| 2396 | builtin = builtins->javascript_builtin(Builtins::MUL); |
| 2397 | break; |
| 2398 | case Token::DIV: |
| 2399 | builtin = builtins->javascript_builtin(Builtins::DIV); |
| 2400 | break; |
| 2401 | case Token::MOD: |
| 2402 | builtin = builtins->javascript_builtin(Builtins::MOD); |
| 2403 | break; |
| 2404 | case Token::BIT_AND: |
| 2405 | builtin = builtins->javascript_builtin(Builtins::BIT_AND); |
| 2406 | break; |
| 2407 | case Token::BIT_OR: |
| 2408 | builtin = builtins->javascript_builtin(Builtins::BIT_OR); |
| 2409 | break; |
| 2410 | case Token::BIT_XOR: |
| 2411 | builtin = builtins->javascript_builtin(Builtins::BIT_XOR); |
| 2412 | break; |
| 2413 | case Token::SHR: |
| 2414 | builtin = builtins->javascript_builtin(Builtins::SHR); |
| 2415 | break; |
| 2416 | case Token::SAR: |
| 2417 | builtin = builtins->javascript_builtin(Builtins::SAR); |
| 2418 | break; |
| 2419 | case Token::SHL: |
| 2420 | builtin = builtins->javascript_builtin(Builtins::SHL); |
| 2421 | break; |
| 2422 | default: |
| 2423 | UNREACHABLE(); |
| 2424 | } |
| 2425 | |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 2426 | Handle<JSFunction> builtin_function(JSFunction::cast(builtin), isolate); |
kasperl@chromium.org | a555126 | 2010-12-07 12:49:48 +0000 | [diff] [blame] | 2427 | |
| 2428 | bool caught_exception; |
| 2429 | Object** builtin_args[] = { right.location() }; |
| 2430 | Handle<Object> result = Execution::Call(builtin_function, |
| 2431 | left, |
| 2432 | ARRAY_SIZE(builtin_args), |
| 2433 | builtin_args, |
| 2434 | &caught_exception); |
| 2435 | if (caught_exception) { |
| 2436 | return Failure::Exception(); |
| 2437 | } |
| 2438 | return *result; |
| 2439 | } |
| 2440 | |
| 2441 | |
| 2442 | Handle<Code> CompareIC::GetUninitialized(Token::Value op) { |
| 2443 | ICCompareStub stub(op, UNINITIALIZED); |
| 2444 | return stub.GetCode(); |
| 2445 | } |
| 2446 | |
| 2447 | |
| 2448 | CompareIC::State CompareIC::ComputeState(Code* target) { |
| 2449 | int key = target->major_key(); |
| 2450 | if (key == CodeStub::Compare) return GENERIC; |
| 2451 | ASSERT(key == CodeStub::CompareIC); |
| 2452 | return static_cast<State>(target->compare_state()); |
| 2453 | } |
| 2454 | |
| 2455 | |
| 2456 | const char* CompareIC::GetStateName(State state) { |
| 2457 | switch (state) { |
| 2458 | case UNINITIALIZED: return "UNINITIALIZED"; |
| 2459 | case SMIS: return "SMIS"; |
| 2460 | case HEAP_NUMBERS: return "HEAP_NUMBERS"; |
| 2461 | case OBJECTS: return "OBJECTS"; |
karlklose@chromium.org | 83a4728 | 2011-05-11 11:54:09 +0000 | [diff] [blame] | 2462 | case SYMBOLS: return "SYMBOLS"; |
lrn@chromium.org | 1c09276 | 2011-05-09 09:42:16 +0000 | [diff] [blame] | 2463 | case STRINGS: return "STRINGS"; |
kasperl@chromium.org | a555126 | 2010-12-07 12:49:48 +0000 | [diff] [blame] | 2464 | case GENERIC: return "GENERIC"; |
| 2465 | default: |
| 2466 | UNREACHABLE(); |
| 2467 | return NULL; |
| 2468 | } |
| 2469 | } |
| 2470 | |
| 2471 | |
ager@chromium.org | 5f0c45f | 2010-12-17 08:51:21 +0000 | [diff] [blame] | 2472 | CompareIC::State CompareIC::TargetState(State state, |
| 2473 | bool has_inlined_smi_code, |
| 2474 | Handle<Object> x, |
| 2475 | Handle<Object> y) { |
karlklose@chromium.org | 83a4728 | 2011-05-11 11:54:09 +0000 | [diff] [blame] | 2476 | if (!has_inlined_smi_code && state != UNINITIALIZED && state != SYMBOLS) { |
| 2477 | return GENERIC; |
| 2478 | } |
ager@chromium.org | 5f0c45f | 2010-12-17 08:51:21 +0000 | [diff] [blame] | 2479 | if (state == UNINITIALIZED && x->IsSmi() && y->IsSmi()) return SMIS; |
| 2480 | if ((state == UNINITIALIZED || (state == SMIS && has_inlined_smi_code)) && |
| 2481 | x->IsNumber() && y->IsNumber()) return HEAP_NUMBERS; |
kasperl@chromium.org | a555126 | 2010-12-07 12:49:48 +0000 | [diff] [blame] | 2482 | if (op_ != Token::EQ && op_ != Token::EQ_STRICT) return GENERIC; |
ager@chromium.org | 5f0c45f | 2010-12-17 08:51:21 +0000 | [diff] [blame] | 2483 | if (state == UNINITIALIZED && |
karlklose@chromium.org | 83a4728 | 2011-05-11 11:54:09 +0000 | [diff] [blame] | 2484 | x->IsSymbol() && y->IsSymbol()) return SYMBOLS; |
| 2485 | if ((state == UNINITIALIZED || state == SYMBOLS) && |
lrn@chromium.org | 1c09276 | 2011-05-09 09:42:16 +0000 | [diff] [blame] | 2486 | x->IsString() && y->IsString()) return STRINGS; |
| 2487 | if (state == UNINITIALIZED && |
ager@chromium.org | 5f0c45f | 2010-12-17 08:51:21 +0000 | [diff] [blame] | 2488 | x->IsJSObject() && y->IsJSObject()) return OBJECTS; |
kasperl@chromium.org | a555126 | 2010-12-07 12:49:48 +0000 | [diff] [blame] | 2489 | return GENERIC; |
| 2490 | } |
| 2491 | |
| 2492 | |
| 2493 | // Used from ic_<arch>.cc. |
kmillikin@chromium.org | c36ce6e | 2011-04-04 08:25:31 +0000 | [diff] [blame] | 2494 | RUNTIME_FUNCTION(Code*, CompareIC_Miss) { |
kasperl@chromium.org | a555126 | 2010-12-07 12:49:48 +0000 | [diff] [blame] | 2495 | NoHandleAllocation na; |
| 2496 | ASSERT(args.length() == 3); |
svenpanne@chromium.org | 6d786c9 | 2011-06-15 10:58:27 +0000 | [diff] [blame] | 2497 | CompareIC ic(isolate, static_cast<Token::Value>(args.smi_at(2))); |
kasperl@chromium.org | a555126 | 2010-12-07 12:49:48 +0000 | [diff] [blame] | 2498 | ic.UpdateCaches(args.at<Object>(0), args.at<Object>(1)); |
| 2499 | return ic.target(); |
| 2500 | } |
| 2501 | |
| 2502 | |
ricow@chromium.org | 9fa0967 | 2011-07-25 11:05:35 +0000 | [diff] [blame] | 2503 | RUNTIME_FUNCTION(MaybeObject*, ToBoolean_Patch) { |
| 2504 | ASSERT(args.length() == 3); |
| 2505 | |
| 2506 | HandleScope scope(isolate); |
| 2507 | Handle<Object> object = args.at<Object>(0); |
| 2508 | Register tos = Register::from_code(args.smi_at(1)); |
| 2509 | ToBooleanStub::Types old_types(args.smi_at(2)); |
| 2510 | |
| 2511 | ToBooleanStub::Types new_types(old_types); |
| 2512 | bool to_boolean_value = new_types.Record(object); |
| 2513 | old_types.TraceTransition(new_types); |
| 2514 | |
| 2515 | ToBooleanStub stub(tos, new_types); |
| 2516 | Handle<Code> code = stub.GetCode(); |
| 2517 | ToBooleanIC ic(isolate); |
| 2518 | ic.patch(*code); |
| 2519 | return Smi::FromInt(to_boolean_value ? 1 : 0); |
| 2520 | } |
| 2521 | |
| 2522 | |
| 2523 | void ToBooleanIC::patch(Code* code) { |
| 2524 | set_target(code); |
| 2525 | } |
| 2526 | |
| 2527 | |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 2528 | static const Address IC_utilities[] = { |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 2529 | #define ADDR(name) FUNCTION_ADDR(name), |
| 2530 | IC_UTIL_LIST(ADDR) |
| 2531 | NULL |
| 2532 | #undef ADDR |
| 2533 | }; |
| 2534 | |
| 2535 | |
| 2536 | Address IC::AddressFromUtilityId(IC::UtilityId id) { |
| 2537 | return IC_utilities[id]; |
| 2538 | } |
| 2539 | |
| 2540 | |
| 2541 | } } // namespace v8::internal |