stub-cache.cc revision bb769b257e753aafcbd96767abb2abc645eaa20c 
1// Copyright 2006-2009 the V8 project authors. All rights reserved.
2// Redistribution and use in source and binary forms, with or without
3// modification, are permitted provided that the following conditions are
4// met:
5//
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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
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11//       with the distribution.
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15//
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22// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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27
28#include "v8.h"
29
30#include "api.h"
31#include "arguments.h"
32#include "ic-inl.h"
33#include "stub-cache.h"
34
35namespace v8 {
36namespace internal {
37
38// -----------------------------------------------------------------------
39// StubCache implementation.
40
41
42StubCache::Entry StubCache::primary_[StubCache::kPrimaryTableSize];
43StubCache::Entry StubCache::secondary_[StubCache::kSecondaryTableSize];
44
45void StubCache::Initialize(bool create_heap_objects) {
46  ASSERT(IsPowerOf2(kPrimaryTableSize));
47  ASSERT(IsPowerOf2(kSecondaryTableSize));
48  if (create_heap_objects) {
49    HandleScope scope;
50    Clear();
51  }
52}
53
54
55Code* StubCache::Set(String* name, Map* map, Code* code) {
56  // Get the flags from the code.
57  Code::Flags flags = Code::RemoveTypeFromFlags(code->flags());
58
59  // Validate that the name does not move on scavenge, and that we
60  // can use identity checks instead of string equality checks.
61  ASSERT(!Heap::InNewSpace(name));
62  ASSERT(name->IsSymbol());
63
64  // The state bits are not important to the hash function because
65  // the stub cache only contains monomorphic stubs. Make sure that
66  // the bits are the least significant so they will be the ones
67  // masked out.
68  ASSERT(Code::ExtractICStateFromFlags(flags) == MONOMORPHIC);
69  ASSERT(Code::kFlagsICStateShift == 0);
70
71  // Make sure that the code type is not included in the hash.
72  ASSERT(Code::ExtractTypeFromFlags(flags) == 0);
73
74  // Compute the primary entry.
75  int primary_offset = PrimaryOffset(name, flags, map);
76  Entry* primary = entry(primary_, primary_offset);
77  Code* hit = primary->value;
78
79  // If the primary entry has useful data in it, we retire it to the
80  // secondary cache before overwriting it.
81  if (hit != Builtins::builtin(Builtins::Illegal)) {
82    Code::Flags primary_flags = Code::RemoveTypeFromFlags(hit->flags());
83    int secondary_offset =
84        SecondaryOffset(primary->key, primary_flags, primary_offset);
85    Entry* secondary = entry(secondary_, secondary_offset);
86    *secondary = *primary;
87  }
88
89  // Update primary cache.
90  primary->key = name;
91  primary->value = code;
92  return code;
93}
94
95
96Object* StubCache::ComputeLoadNonexistent(String* name, JSObject* receiver) {
97  ASSERT(receiver->IsGlobalObject() || receiver->HasFastProperties());
98  // If no global objects are present in the prototype chain, the load
99  // nonexistent IC stub can be shared for all names for a given map
100  // and we use the empty string for the map cache in that case.  If
101  // there are global objects involved, we need to check global
102  // property cells in the stub and therefore the stub will be
103  // specific to the name.
104  String* cache_name = Heap::empty_string();
105  if (receiver->IsGlobalObject()) cache_name = name;
106  JSObject* last = receiver;
107  while (last->GetPrototype() != Heap::null_value()) {
108    last = JSObject::cast(last->GetPrototype());
109    if (last->IsGlobalObject()) cache_name = name;
110  }
111  // Compile the stub that is either shared for all names or
112  // name specific if there are global objects involved.
113  Code::Flags flags =
114      Code::ComputeMonomorphicFlags(Code::LOAD_IC, NONEXISTENT);
115  Object* code = receiver->map()->FindInCodeCache(cache_name, flags);
116  if (code->IsUndefined()) {
117    LoadStubCompiler compiler;
118    code = compiler.CompileLoadNonexistent(cache_name, receiver, last);
119    if (code->IsFailure()) return code;
120    PROFILE(CodeCreateEvent(Logger::LOAD_IC_TAG, Code::cast(code), cache_name));
121    Object* result =
122        receiver->map()->UpdateCodeCache(cache_name, Code::cast(code));
123    if (result->IsFailure()) return result;
124  }
125  return code;
126}
127
128
129Object* StubCache::ComputeLoadField(String* name,
130                                    JSObject* receiver,
131                                    JSObject* holder,
132                                    int field_index) {
133  ASSERT(IC::GetCodeCacheForObject(receiver, holder) == OWN_MAP);
134  Map* map = receiver->map();
135  Code::Flags flags = Code::ComputeMonomorphicFlags(Code::LOAD_IC, FIELD);
136  Object* code = map->FindInCodeCache(name, flags);
137  if (code->IsUndefined()) {
138    LoadStubCompiler compiler;
139    code = compiler.CompileLoadField(receiver, holder, field_index, name);
140    if (code->IsFailure()) return code;
141    PROFILE(CodeCreateEvent(Logger::LOAD_IC_TAG, Code::cast(code), name));
142    Object* result = map->UpdateCodeCache(name, Code::cast(code));
143    if (result->IsFailure()) return result;
144  }
145  return code;
146}
147
148
149Object* StubCache::ComputeLoadCallback(String* name,
150                                       JSObject* receiver,
151                                       JSObject* holder,
152                                       AccessorInfo* callback) {
153  ASSERT(v8::ToCData<Address>(callback->getter()) != 0);
154  ASSERT(IC::GetCodeCacheForObject(receiver, holder) == OWN_MAP);
155  Map* map = receiver->map();
156  Code::Flags flags = Code::ComputeMonomorphicFlags(Code::LOAD_IC, CALLBACKS);
157  Object* code = map->FindInCodeCache(name, flags);
158  if (code->IsUndefined()) {
159    LoadStubCompiler compiler;
160    code = compiler.CompileLoadCallback(name, receiver, holder, callback);
161    if (code->IsFailure()) return code;
162    PROFILE(CodeCreateEvent(Logger::LOAD_IC_TAG, Code::cast(code), name));
163    Object* result = map->UpdateCodeCache(name, Code::cast(code));
164    if (result->IsFailure()) return result;
165  }
166  return code;
167}
168
169
170Object* StubCache::ComputeLoadConstant(String* name,
171                                       JSObject* receiver,
172                                       JSObject* holder,
173                                       Object* value) {
174  ASSERT(IC::GetCodeCacheForObject(receiver, holder) == OWN_MAP);
175  Map* map = receiver->map();
176  Code::Flags flags =
177      Code::ComputeMonomorphicFlags(Code::LOAD_IC, CONSTANT_FUNCTION);
178  Object* code = map->FindInCodeCache(name, flags);
179  if (code->IsUndefined()) {
180    LoadStubCompiler compiler;
181    code = compiler.CompileLoadConstant(receiver, holder, value, name);
182    if (code->IsFailure()) return code;
183    PROFILE(CodeCreateEvent(Logger::LOAD_IC_TAG, Code::cast(code), name));
184    Object* result = map->UpdateCodeCache(name, Code::cast(code));
185    if (result->IsFailure()) return result;
186  }
187  return code;
188}
189
190
191Object* StubCache::ComputeLoadInterceptor(String* name,
192                                          JSObject* receiver,
193                                          JSObject* holder) {
194  ASSERT(IC::GetCodeCacheForObject(receiver, holder) == OWN_MAP);
195  Map* map = receiver->map();
196  Code::Flags flags = Code::ComputeMonomorphicFlags(Code::LOAD_IC, INTERCEPTOR);
197  Object* code = map->FindInCodeCache(name, flags);
198  if (code->IsUndefined()) {
199    LoadStubCompiler compiler;
200    code = compiler.CompileLoadInterceptor(receiver, holder, name);
201    if (code->IsFailure()) return code;
202    PROFILE(CodeCreateEvent(Logger::LOAD_IC_TAG, Code::cast(code), name));
203    Object* result = map->UpdateCodeCache(name, Code::cast(code));
204    if (result->IsFailure()) return result;
205  }
206  return code;
207}
208
209
210Object* StubCache::ComputeLoadNormal() {
211  return Builtins::builtin(Builtins::LoadIC_Normal);
212}
213
214
215Object* StubCache::ComputeLoadGlobal(String* name,
216                                     JSObject* receiver,
217                                     GlobalObject* holder,
218                                     JSGlobalPropertyCell* cell,
219                                     bool is_dont_delete) {
220  ASSERT(IC::GetCodeCacheForObject(receiver, holder) == OWN_MAP);
221  Map* map = receiver->map();
222  Code::Flags flags = Code::ComputeMonomorphicFlags(Code::LOAD_IC, NORMAL);
223  Object* code = map->FindInCodeCache(name, flags);
224  if (code->IsUndefined()) {
225    LoadStubCompiler compiler;
226    code = compiler.CompileLoadGlobal(receiver,
227                                      holder,
228                                      cell,
229                                      name,
230                                      is_dont_delete);
231    if (code->IsFailure()) return code;
232    PROFILE(CodeCreateEvent(Logger::LOAD_IC_TAG, Code::cast(code), name));
233    Object* result = map->UpdateCodeCache(name, Code::cast(code));
234    if (result->IsFailure()) return result;
235  }
236  return code;
237}
238
239
240Object* StubCache::ComputeKeyedLoadField(String* name,
241                                         JSObject* receiver,
242                                         JSObject* holder,
243                                         int field_index) {
244  ASSERT(IC::GetCodeCacheForObject(receiver, holder) == OWN_MAP);
245  Map* map = receiver->map();
246  Code::Flags flags = Code::ComputeMonomorphicFlags(Code::KEYED_LOAD_IC, FIELD);
247  Object* code = map->FindInCodeCache(name, flags);
248  if (code->IsUndefined()) {
249    KeyedLoadStubCompiler compiler;
250    code = compiler.CompileLoadField(name, receiver, holder, field_index);
251    if (code->IsFailure()) return code;
252    PROFILE(CodeCreateEvent(Logger::KEYED_LOAD_IC_TAG, Code::cast(code), name));
253    Object* result = map->UpdateCodeCache(name, Code::cast(code));
254    if (result->IsFailure()) return result;
255  }
256  return code;
257}
258
259
260Object* StubCache::ComputeKeyedLoadConstant(String* name,
261                                            JSObject* receiver,
262                                            JSObject* holder,
263                                            Object* value) {
264  ASSERT(IC::GetCodeCacheForObject(receiver, holder) == OWN_MAP);
265  Map* map = receiver->map();
266  Code::Flags flags =
267      Code::ComputeMonomorphicFlags(Code::KEYED_LOAD_IC, CONSTANT_FUNCTION);
268  Object* code = map->FindInCodeCache(name, flags);
269  if (code->IsUndefined()) {
270    KeyedLoadStubCompiler compiler;
271    code = compiler.CompileLoadConstant(name, receiver, holder, value);
272    if (code->IsFailure()) return code;
273    PROFILE(CodeCreateEvent(Logger::KEYED_LOAD_IC_TAG, Code::cast(code), name));
274    Object* result = map->UpdateCodeCache(name, Code::cast(code));
275    if (result->IsFailure()) return result;
276  }
277  return code;
278}
279
280
281Object* StubCache::ComputeKeyedLoadInterceptor(String* name,
282                                               JSObject* receiver,
283                                               JSObject* holder) {
284  ASSERT(IC::GetCodeCacheForObject(receiver, holder) == OWN_MAP);
285  Map* map = receiver->map();
286  Code::Flags flags =
287      Code::ComputeMonomorphicFlags(Code::KEYED_LOAD_IC, INTERCEPTOR);
288  Object* code = map->FindInCodeCache(name, flags);
289  if (code->IsUndefined()) {
290    KeyedLoadStubCompiler compiler;
291    code = compiler.CompileLoadInterceptor(receiver, holder, name);
292    if (code->IsFailure()) return code;
293    PROFILE(CodeCreateEvent(Logger::KEYED_LOAD_IC_TAG, Code::cast(code), name));
294    Object* result = map->UpdateCodeCache(name, Code::cast(code));
295    if (result->IsFailure()) return result;
296  }
297  return code;
298}
299
300
301Object* StubCache::ComputeKeyedLoadCallback(String* name,
302                                            JSObject* receiver,
303                                            JSObject* holder,
304                                            AccessorInfo* callback) {
305  ASSERT(IC::GetCodeCacheForObject(receiver, holder) == OWN_MAP);
306  Map* map = receiver->map();
307  Code::Flags flags =
308      Code::ComputeMonomorphicFlags(Code::KEYED_LOAD_IC, CALLBACKS);
309  Object* code = map->FindInCodeCache(name, flags);
310  if (code->IsUndefined()) {
311    KeyedLoadStubCompiler compiler;
312    code = compiler.CompileLoadCallback(name, receiver, holder, callback);
313    if (code->IsFailure()) return code;
314    PROFILE(CodeCreateEvent(Logger::KEYED_LOAD_IC_TAG, Code::cast(code), name));
315    Object* result = map->UpdateCodeCache(name, Code::cast(code));
316    if (result->IsFailure()) return result;
317  }
318  return code;
319}
320
321
322
323Object* StubCache::ComputeKeyedLoadArrayLength(String* name,
324                                               JSArray* receiver) {
325  Code::Flags flags =
326      Code::ComputeMonomorphicFlags(Code::KEYED_LOAD_IC, CALLBACKS);
327  ASSERT(receiver->IsJSObject());
328  Map* map = receiver->map();
329  Object* code = map->FindInCodeCache(name, flags);
330  if (code->IsUndefined()) {
331    KeyedLoadStubCompiler compiler;
332    code = compiler.CompileLoadArrayLength(name);
333    if (code->IsFailure()) return code;
334    PROFILE(CodeCreateEvent(Logger::KEYED_LOAD_IC_TAG, Code::cast(code), name));
335    Object* result = map->UpdateCodeCache(name, Code::cast(code));
336    if (result->IsFailure()) return result;
337  }
338  return code;
339}
340
341
342Object* StubCache::ComputeKeyedLoadStringLength(String* name,
343                                                String* receiver) {
344  Code::Flags flags =
345      Code::ComputeMonomorphicFlags(Code::KEYED_LOAD_IC, CALLBACKS);
346  Map* map = receiver->map();
347  Object* code = map->FindInCodeCache(name, flags);
348  if (code->IsUndefined()) {
349    KeyedLoadStubCompiler compiler;
350    code = compiler.CompileLoadStringLength(name);
351    if (code->IsFailure()) return code;
352    PROFILE(CodeCreateEvent(Logger::KEYED_LOAD_IC_TAG, Code::cast(code), name));
353    Object* result = map->UpdateCodeCache(name, Code::cast(code));
354    if (result->IsFailure()) return result;
355  }
356  return code;
357}
358
359
360Object* StubCache::ComputeKeyedLoadFunctionPrototype(String* name,
361                                                     JSFunction* receiver) {
362  Code::Flags flags =
363      Code::ComputeMonomorphicFlags(Code::KEYED_LOAD_IC, CALLBACKS);
364  Map* map = receiver->map();
365  Object* code = map->FindInCodeCache(name, flags);
366  if (code->IsUndefined()) {
367    KeyedLoadStubCompiler compiler;
368    code = compiler.CompileLoadFunctionPrototype(name);
369    if (code->IsFailure()) return code;
370    PROFILE(CodeCreateEvent(Logger::KEYED_LOAD_IC_TAG, Code::cast(code), name));
371    Object* result = map->UpdateCodeCache(name, Code::cast(code));
372    if (result->IsFailure()) return result;
373  }
374  return code;
375}
376
377
378Object* StubCache::ComputeStoreField(String* name,
379                                     JSObject* receiver,
380                                     int field_index,
381                                     Map* transition) {
382  PropertyType type = (transition == NULL) ? FIELD : MAP_TRANSITION;
383  Code::Flags flags = Code::ComputeMonomorphicFlags(Code::STORE_IC, type);
384  Object* code = receiver->map()->FindInCodeCache(name, flags);
385  if (code->IsUndefined()) {
386    StoreStubCompiler compiler;
387    code = compiler.CompileStoreField(receiver, field_index, transition, name);
388    if (code->IsFailure()) return code;
389    PROFILE(CodeCreateEvent(Logger::STORE_IC_TAG, Code::cast(code), name));
390    Object* result = receiver->map()->UpdateCodeCache(name, Code::cast(code));
391    if (result->IsFailure()) return result;
392  }
393  return code;
394}
395
396
397Object* StubCache::ComputeStoreNormal() {
398  return Builtins::builtin(Builtins::StoreIC_Normal);
399}
400
401
402Object* StubCache::ComputeStoreGlobal(String* name,
403                                      GlobalObject* receiver,
404                                      JSGlobalPropertyCell* cell) {
405  Code::Flags flags = Code::ComputeMonomorphicFlags(Code::STORE_IC, NORMAL);
406  Object* code = receiver->map()->FindInCodeCache(name, flags);
407  if (code->IsUndefined()) {
408    StoreStubCompiler compiler;
409    code = compiler.CompileStoreGlobal(receiver, cell, name);
410    if (code->IsFailure()) return code;
411    PROFILE(CodeCreateEvent(Logger::STORE_IC_TAG, Code::cast(code), name));
412    Object* result = receiver->map()->UpdateCodeCache(name, Code::cast(code));
413    if (result->IsFailure()) return result;
414  }
415  return code;
416}
417
418
419Object* StubCache::ComputeStoreCallback(String* name,
420                                        JSObject* receiver,
421                                        AccessorInfo* callback) {
422  ASSERT(v8::ToCData<Address>(callback->setter()) != 0);
423  Code::Flags flags = Code::ComputeMonomorphicFlags(Code::STORE_IC, CALLBACKS);
424  Object* code = receiver->map()->FindInCodeCache(name, flags);
425  if (code->IsUndefined()) {
426    StoreStubCompiler compiler;
427    code = compiler.CompileStoreCallback(receiver, callback, name);
428    if (code->IsFailure()) return code;
429    PROFILE(CodeCreateEvent(Logger::STORE_IC_TAG, Code::cast(code), name));
430    Object* result = receiver->map()->UpdateCodeCache(name, Code::cast(code));
431    if (result->IsFailure()) return result;
432  }
433  return code;
434}
435
436
437Object* StubCache::ComputeStoreInterceptor(String* name,
438                                           JSObject* receiver) {
439  Code::Flags flags =
440      Code::ComputeMonomorphicFlags(Code::STORE_IC, INTERCEPTOR);
441  Object* code = receiver->map()->FindInCodeCache(name, flags);
442  if (code->IsUndefined()) {
443    StoreStubCompiler compiler;
444    code = compiler.CompileStoreInterceptor(receiver, name);
445    if (code->IsFailure()) return code;
446    PROFILE(CodeCreateEvent(Logger::STORE_IC_TAG, Code::cast(code), name));
447    Object* result = receiver->map()->UpdateCodeCache(name, Code::cast(code));
448    if (result->IsFailure()) return result;
449  }
450  return code;
451}
452
453
454Object* StubCache::ComputeKeyedStoreField(String* name, JSObject* receiver,
455                                          int field_index, Map* transition) {
456  PropertyType type = (transition == NULL) ? FIELD : MAP_TRANSITION;
457  Code::Flags flags = Code::ComputeMonomorphicFlags(Code::KEYED_STORE_IC, type);
458  Object* code = receiver->map()->FindInCodeCache(name, flags);
459  if (code->IsUndefined()) {
460    KeyedStoreStubCompiler compiler;
461    code = compiler.CompileStoreField(receiver, field_index, transition, name);
462    if (code->IsFailure()) return code;
463    PROFILE(CodeCreateEvent(
464        Logger::KEYED_STORE_IC_TAG, Code::cast(code), name));
465    Object* result = receiver->map()->UpdateCodeCache(name, Code::cast(code));
466    if (result->IsFailure()) return result;
467  }
468  return code;
469}
470
471#define CALL_LOGGER_TAG(kind, type) \
472    (kind == Code::CALL_IC ? Logger::type : Logger::KEYED_##type)
473
474Object* StubCache::ComputeCallConstant(int argc,
475                                       InLoopFlag in_loop,
476                                       Code::Kind kind,
477                                       String* name,
478                                       Object* object,
479                                       JSObject* holder,
480                                       JSFunction* function) {
481  // Compute the check type and the map.
482  InlineCacheHolderFlag cache_holder =
483      IC::GetCodeCacheForObject(object, holder);
484  Map* map = IC::GetCodeCacheMap(object, cache_holder);
485
486  // Compute check type based on receiver/holder.
487  StubCompiler::CheckType check = StubCompiler::RECEIVER_MAP_CHECK;
488  if (object->IsString()) {
489    check = StubCompiler::STRING_CHECK;
490  } else if (object->IsNumber()) {
491    check = StubCompiler::NUMBER_CHECK;
492  } else if (object->IsBoolean()) {
493    check = StubCompiler::BOOLEAN_CHECK;
494  }
495
496  Code::Flags flags =
497      Code::ComputeMonomorphicFlags(kind,
498                                    CONSTANT_FUNCTION,
499                                    cache_holder,
500                                    in_loop,
501                                    argc);
502  Object* code = map->FindInCodeCache(name, flags);
503  if (code->IsUndefined()) {
504    // If the function hasn't been compiled yet, we cannot do it now
505    // because it may cause GC. To avoid this issue, we return an
506    // internal error which will make sure we do not update any
507    // caches.
508    if (!function->is_compiled()) return Failure::InternalError();
509    // Compile the stub - only create stubs for fully compiled functions.
510    CallStubCompiler compiler(argc, in_loop, kind, cache_holder);
511    code = compiler.CompileCallConstant(object, holder, function, name, check);
512    if (code->IsFailure()) return code;
513    ASSERT_EQ(flags, Code::cast(code)->flags());
514    PROFILE(CodeCreateEvent(CALL_LOGGER_TAG(kind, CALL_IC_TAG),
515                            Code::cast(code), name));
516    Object* result = map->UpdateCodeCache(name, Code::cast(code));
517    if (result->IsFailure()) return result;
518  }
519  return code;
520}
521
522
523Object* StubCache::ComputeCallField(int argc,
524                                    InLoopFlag in_loop,
525                                    Code::Kind kind,
526                                    String* name,
527                                    Object* object,
528                                    JSObject* holder,
529                                    int index) {
530  // Compute the check type and the map.
531  InlineCacheHolderFlag cache_holder =
532      IC::GetCodeCacheForObject(object, holder);
533  Map* map = IC::GetCodeCacheMap(object, cache_holder);
534
535  // TODO(1233596): We cannot do receiver map check for non-JS objects
536  // because they may be represented as immediates without a
537  // map. Instead, we check against the map in the holder.
538  if (object->IsNumber() || object->IsBoolean() || object->IsString()) {
539    object = holder;
540  }
541
542  Code::Flags flags = Code::ComputeMonomorphicFlags(kind,
543                                                    FIELD,
544                                                    cache_holder,
545                                                    in_loop,
546                                                    argc);
547  Object* code = map->FindInCodeCache(name, flags);
548  if (code->IsUndefined()) {
549    CallStubCompiler compiler(argc, in_loop, kind, cache_holder);
550    code = compiler.CompileCallField(JSObject::cast(object),
551                                     holder,
552                                     index,
553                                     name);
554    if (code->IsFailure()) return code;
555    ASSERT_EQ(flags, Code::cast(code)->flags());
556    PROFILE(CodeCreateEvent(CALL_LOGGER_TAG(kind, CALL_IC_TAG),
557                            Code::cast(code), name));
558    Object* result = map->UpdateCodeCache(name, Code::cast(code));
559    if (result->IsFailure()) return result;
560  }
561  return code;
562}
563
564
565Object* StubCache::ComputeCallInterceptor(int argc,
566                                          Code::Kind kind,
567                                          String* name,
568                                          Object* object,
569                                          JSObject* holder) {
570  // Compute the check type and the map.
571  InlineCacheHolderFlag cache_holder =
572      IC::GetCodeCacheForObject(object, holder);
573  Map* map = IC::GetCodeCacheMap(object, cache_holder);
574
575  // TODO(1233596): We cannot do receiver map check for non-JS objects
576  // because they may be represented as immediates without a
577  // map. Instead, we check against the map in the holder.
578  if (object->IsNumber() || object->IsBoolean() || object->IsString()) {
579    object = holder;
580  }
581
582  Code::Flags flags =
583      Code::ComputeMonomorphicFlags(kind,
584                                    INTERCEPTOR,
585                                    cache_holder,
586                                    NOT_IN_LOOP,
587                                    argc);
588  Object* code = map->FindInCodeCache(name, flags);
589  if (code->IsUndefined()) {
590    CallStubCompiler compiler(argc, NOT_IN_LOOP, kind, cache_holder);
591    code = compiler.CompileCallInterceptor(JSObject::cast(object),
592                                           holder,
593                                           name);
594    if (code->IsFailure()) return code;
595    ASSERT_EQ(flags, Code::cast(code)->flags());
596    PROFILE(CodeCreateEvent(CALL_LOGGER_TAG(kind, CALL_IC_TAG),
597                            Code::cast(code), name));
598    Object* result = map->UpdateCodeCache(name, Code::cast(code));
599    if (result->IsFailure()) return result;
600  }
601  return code;
602}
603
604
605Object* StubCache::ComputeCallNormal(int argc,
606                                     InLoopFlag in_loop,
607                                     Code::Kind kind,
608                                     String* name,
609                                     JSObject* receiver) {
610  Object* code = ComputeCallNormal(argc, in_loop, kind);
611  if (code->IsFailure()) return code;
612  return code;
613}
614
615
616Object* StubCache::ComputeCallGlobal(int argc,
617                                     InLoopFlag in_loop,
618                                     Code::Kind kind,
619                                     String* name,
620                                     JSObject* receiver,
621                                     GlobalObject* holder,
622                                     JSGlobalPropertyCell* cell,
623                                     JSFunction* function) {
624  InlineCacheHolderFlag cache_holder =
625      IC::GetCodeCacheForObject(receiver, holder);
626  Map* map = IC::GetCodeCacheMap(receiver, cache_holder);
627  Code::Flags flags =
628      Code::ComputeMonomorphicFlags(kind,
629                                    NORMAL,
630                                    cache_holder,
631                                    in_loop,
632                                    argc);
633  Object* code = map->FindInCodeCache(name, flags);
634  if (code->IsUndefined()) {
635    // If the function hasn't been compiled yet, we cannot do it now
636    // because it may cause GC. To avoid this issue, we return an
637    // internal error which will make sure we do not update any
638    // caches.
639    if (!function->is_compiled()) return Failure::InternalError();
640    CallStubCompiler compiler(argc, in_loop, kind, cache_holder);
641    code = compiler.CompileCallGlobal(receiver, holder, cell, function, name);
642    if (code->IsFailure()) return code;
643    ASSERT_EQ(flags, Code::cast(code)->flags());
644    PROFILE(CodeCreateEvent(CALL_LOGGER_TAG(kind, CALL_IC_TAG),
645                            Code::cast(code), name));
646    Object* result = map->UpdateCodeCache(name, Code::cast(code));
647    if (result->IsFailure()) return result;
648  }
649  return code;
650}
651
652
653static Object* GetProbeValue(Code::Flags flags) {
654  // Use raw_unchecked... so we don't get assert failures during GC.
655  NumberDictionary* dictionary = Heap::raw_unchecked_non_monomorphic_cache();
656  int entry = dictionary->FindEntry(flags);
657  if (entry != -1) return dictionary->ValueAt(entry);
658  return Heap::raw_unchecked_undefined_value();
659}
660
661
662static Object* ProbeCache(Code::Flags flags) {
663  Object* probe = GetProbeValue(flags);
664  if (probe != Heap::undefined_value()) return probe;
665  // Seed the cache with an undefined value to make sure that any
666  // generated code object can always be inserted into the cache
667  // without causing  allocation failures.
668  Object* result =
669      Heap::non_monomorphic_cache()->AtNumberPut(flags,
670                                                 Heap::undefined_value());
671  if (result->IsFailure()) return result;
672  Heap::public_set_non_monomorphic_cache(NumberDictionary::cast(result));
673  return probe;
674}
675
676
677static Object* FillCache(Object* code) {
678  if (code->IsCode()) {
679    int entry =
680        Heap::non_monomorphic_cache()->FindEntry(
681            Code::cast(code)->flags());
682    // The entry must be present see comment in ProbeCache.
683    ASSERT(entry != -1);
684    ASSERT(Heap::non_monomorphic_cache()->ValueAt(entry) ==
685           Heap::undefined_value());
686    Heap::non_monomorphic_cache()->ValueAtPut(entry, code);
687    CHECK(GetProbeValue(Code::cast(code)->flags()) == code);
688  }
689  return code;
690}
691
692
693Code* StubCache::FindCallInitialize(int argc,
694                                    InLoopFlag in_loop,
695                                    Code::Kind kind) {
696  Code::Flags flags =
697      Code::ComputeFlags(kind, in_loop, UNINITIALIZED, NORMAL, argc);
698  Object* result = ProbeCache(flags);
699  ASSERT(!result->IsUndefined());
700  // This might be called during the marking phase of the collector
701  // hence the unchecked cast.
702  return reinterpret_cast<Code*>(result);
703}
704
705
706Object* StubCache::ComputeCallInitialize(int argc,
707                                         InLoopFlag in_loop,
708                                         Code::Kind kind) {
709  Code::Flags flags =
710      Code::ComputeFlags(kind, in_loop, UNINITIALIZED, NORMAL, argc);
711  Object* probe = ProbeCache(flags);
712  if (!probe->IsUndefined()) return probe;
713  StubCompiler compiler;
714  return FillCache(compiler.CompileCallInitialize(flags));
715}
716
717
718Object* StubCache::ComputeCallPreMonomorphic(int argc,
719                                             InLoopFlag in_loop,
720                                             Code::Kind kind) {
721  Code::Flags flags =
722      Code::ComputeFlags(kind, in_loop, PREMONOMORPHIC, NORMAL, argc);
723  Object* probe = ProbeCache(flags);
724  if (!probe->IsUndefined()) return probe;
725  StubCompiler compiler;
726  return FillCache(compiler.CompileCallPreMonomorphic(flags));
727}
728
729
730Object* StubCache::ComputeCallNormal(int argc,
731                                     InLoopFlag in_loop,
732                                     Code::Kind kind) {
733  Code::Flags flags =
734      Code::ComputeFlags(kind, in_loop, MONOMORPHIC, NORMAL, argc);
735  Object* probe = ProbeCache(flags);
736  if (!probe->IsUndefined()) return probe;
737  StubCompiler compiler;
738  return FillCache(compiler.CompileCallNormal(flags));
739}
740
741
742Object* StubCache::ComputeCallMegamorphic(int argc,
743                                          InLoopFlag in_loop,
744                                          Code::Kind kind) {
745  Code::Flags flags =
746      Code::ComputeFlags(kind, in_loop, MEGAMORPHIC, NORMAL, argc);
747  Object* probe = ProbeCache(flags);
748  if (!probe->IsUndefined()) return probe;
749  StubCompiler compiler;
750  return FillCache(compiler.CompileCallMegamorphic(flags));
751}
752
753
754Object* StubCache::ComputeCallMiss(int argc, Code::Kind kind) {
755  // MONOMORPHIC_PROTOTYPE_FAILURE state is used to make sure that miss stubs
756  // and monomorphic stubs are not mixed up together in the stub cache.
757  Code::Flags flags = Code::ComputeFlags(
758     kind, NOT_IN_LOOP, MONOMORPHIC_PROTOTYPE_FAILURE, NORMAL, argc);
759  Object* probe = ProbeCache(flags);
760  if (!probe->IsUndefined()) return probe;
761  StubCompiler compiler;
762  return FillCache(compiler.CompileCallMiss(flags));
763}
764
765
766#ifdef ENABLE_DEBUGGER_SUPPORT
767Object* StubCache::ComputeCallDebugBreak(int argc, Code::Kind kind) {
768  Code::Flags flags =
769      Code::ComputeFlags(kind, NOT_IN_LOOP, DEBUG_BREAK, NORMAL, argc);
770  Object* probe = ProbeCache(flags);
771  if (!probe->IsUndefined()) return probe;
772  StubCompiler compiler;
773  return FillCache(compiler.CompileCallDebugBreak(flags));
774}
775
776
777Object* StubCache::ComputeCallDebugPrepareStepIn(int argc, Code::Kind kind) {
778  Code::Flags flags =
779      Code::ComputeFlags(kind,
780                         NOT_IN_LOOP,
781                         DEBUG_PREPARE_STEP_IN,
782                         NORMAL,
783                         argc);
784  Object* probe = ProbeCache(flags);
785  if (!probe->IsUndefined()) return probe;
786  StubCompiler compiler;
787  return FillCache(compiler.CompileCallDebugPrepareStepIn(flags));
788}
789#endif
790
791
792Object* StubCache::ComputeLazyCompile(int argc) {
793  Code::Flags flags =
794      Code::ComputeFlags(Code::STUB, NOT_IN_LOOP, UNINITIALIZED, NORMAL, argc);
795  Object* probe = ProbeCache(flags);
796  if (!probe->IsUndefined()) return probe;
797  StubCompiler compiler;
798  Object* result = FillCache(compiler.CompileLazyCompile(flags));
799  if (result->IsCode()) {
800    Code* code = Code::cast(result);
801    USE(code);
802    PROFILE(CodeCreateEvent(Logger::LAZY_COMPILE_TAG,
803                            code, code->arguments_count()));
804  }
805  return result;
806}
807
808
809void StubCache::Clear() {
810  for (int i = 0; i < kPrimaryTableSize; i++) {
811    primary_[i].key = Heap::empty_string();
812    primary_[i].value = Builtins::builtin(Builtins::Illegal);
813  }
814  for (int j = 0; j < kSecondaryTableSize; j++) {
815    secondary_[j].key = Heap::empty_string();
816    secondary_[j].value = Builtins::builtin(Builtins::Illegal);
817  }
818}
819
820
821// ------------------------------------------------------------------------
822// StubCompiler implementation.
823
824
825Object* LoadCallbackProperty(Arguments args) {
826  ASSERT(args[0]->IsJSObject());
827  ASSERT(args[1]->IsJSObject());
828  AccessorInfo* callback = AccessorInfo::cast(args[2]);
829  Address getter_address = v8::ToCData<Address>(callback->getter());
830  v8::AccessorGetter fun = FUNCTION_CAST<v8::AccessorGetter>(getter_address);
831  ASSERT(fun != NULL);
832  CustomArguments custom_args(callback->data(),
833                              JSObject::cast(args[0]),
834                              JSObject::cast(args[1]));
835  v8::AccessorInfo info(custom_args.end());
836  HandleScope scope;
837  v8::Handle<v8::Value> result;
838  {
839    // Leaving JavaScript.
840    VMState state(EXTERNAL);
841#ifdef ENABLE_LOGGING_AND_PROFILING
842    state.set_external_callback(getter_address);
843#endif
844    result = fun(v8::Utils::ToLocal(args.at<String>(4)), info);
845  }
846  RETURN_IF_SCHEDULED_EXCEPTION();
847  if (result.IsEmpty()) return Heap::undefined_value();
848  return *v8::Utils::OpenHandle(*result);
849}
850
851
852Object* StoreCallbackProperty(Arguments args) {
853  JSObject* recv = JSObject::cast(args[0]);
854  AccessorInfo* callback = AccessorInfo::cast(args[1]);
855  Address setter_address = v8::ToCData<Address>(callback->setter());
856  v8::AccessorSetter fun = FUNCTION_CAST<v8::AccessorSetter>(setter_address);
857  ASSERT(fun != NULL);
858  Handle<String> name = args.at<String>(2);
859  Handle<Object> value = args.at<Object>(3);
860  HandleScope scope;
861  LOG(ApiNamedPropertyAccess("store", recv, *name));
862  CustomArguments custom_args(callback->data(), recv, recv);
863  v8::AccessorInfo info(custom_args.end());
864  {
865    // Leaving JavaScript.
866    VMState state(EXTERNAL);
867#ifdef ENABLE_LOGGING_AND_PROFILING
868    state.set_external_callback(setter_address);
869#endif
870    fun(v8::Utils::ToLocal(name), v8::Utils::ToLocal(value), info);
871  }
872  RETURN_IF_SCHEDULED_EXCEPTION();
873  return *value;
874}
875
876
877static const int kAccessorInfoOffsetInInterceptorArgs = 2;
878
879
880/**
881 * Attempts to load a property with an interceptor (which must be present),
882 * but doesn't search the prototype chain.
883 *
884 * Returns |Heap::no_interceptor_result_sentinel()| if interceptor doesn't
885 * provide any value for the given name.
886 */
887Object* LoadPropertyWithInterceptorOnly(Arguments args) {
888  Handle<String> name_handle = args.at<String>(0);
889  Handle<InterceptorInfo> interceptor_info = args.at<InterceptorInfo>(1);
890  ASSERT(kAccessorInfoOffsetInInterceptorArgs == 2);
891  ASSERT(args[2]->IsJSObject());  // Receiver.
892  ASSERT(args[3]->IsJSObject());  // Holder.
893  ASSERT(args.length() == 5);  // Last arg is data object.
894
895  Address getter_address = v8::ToCData<Address>(interceptor_info->getter());
896  v8::NamedPropertyGetter getter =
897      FUNCTION_CAST<v8::NamedPropertyGetter>(getter_address);
898  ASSERT(getter != NULL);
899
900  {
901    // Use the interceptor getter.
902    v8::AccessorInfo info(args.arguments() -
903                          kAccessorInfoOffsetInInterceptorArgs);
904    HandleScope scope;
905    v8::Handle<v8::Value> r;
906    {
907      // Leaving JavaScript.
908      VMState state(EXTERNAL);
909      r = getter(v8::Utils::ToLocal(name_handle), info);
910    }
911    RETURN_IF_SCHEDULED_EXCEPTION();
912    if (!r.IsEmpty()) {
913      return *v8::Utils::OpenHandle(*r);
914    }
915  }
916
917  return Heap::no_interceptor_result_sentinel();
918}
919
920
921static Object* ThrowReferenceError(String* name) {
922  // If the load is non-contextual, just return the undefined result.
923  // Note that both keyed and non-keyed loads may end up here, so we
924  // can't use either LoadIC or KeyedLoadIC constructors.
925  IC ic(IC::NO_EXTRA_FRAME);
926  ASSERT(ic.target()->is_load_stub() || ic.target()->is_keyed_load_stub());
927  if (!ic.SlowIsContextual()) return Heap::undefined_value();
928
929  // Throw a reference error.
930  HandleScope scope;
931  Handle<String> name_handle(name);
932  Handle<Object> error =
933      Factory::NewReferenceError("not_defined",
934                                  HandleVector(&name_handle, 1));
935  return Top::Throw(*error);
936}
937
938
939static Object* LoadWithInterceptor(Arguments* args,
940                                   PropertyAttributes* attrs) {
941  Handle<String> name_handle = args->at<String>(0);
942  Handle<InterceptorInfo> interceptor_info = args->at<InterceptorInfo>(1);
943  ASSERT(kAccessorInfoOffsetInInterceptorArgs == 2);
944  Handle<JSObject> receiver_handle = args->at<JSObject>(2);
945  Handle<JSObject> holder_handle = args->at<JSObject>(3);
946  ASSERT(args->length() == 5);  // Last arg is data object.
947
948  Address getter_address = v8::ToCData<Address>(interceptor_info->getter());
949  v8::NamedPropertyGetter getter =
950      FUNCTION_CAST<v8::NamedPropertyGetter>(getter_address);
951  ASSERT(getter != NULL);
952
953  {
954    // Use the interceptor getter.
955    v8::AccessorInfo info(args->arguments() -
956                          kAccessorInfoOffsetInInterceptorArgs);
957    HandleScope scope;
958    v8::Handle<v8::Value> r;
959    {
960      // Leaving JavaScript.
961      VMState state(EXTERNAL);
962      r = getter(v8::Utils::ToLocal(name_handle), info);
963    }
964    RETURN_IF_SCHEDULED_EXCEPTION();
965    if (!r.IsEmpty()) {
966      *attrs = NONE;
967      return *v8::Utils::OpenHandle(*r);
968    }
969  }
970
971  Object* result = holder_handle->GetPropertyPostInterceptor(
972      *receiver_handle,
973      *name_handle,
974      attrs);
975  RETURN_IF_SCHEDULED_EXCEPTION();
976  return result;
977}
978
979
980/**
981 * Loads a property with an interceptor performing post interceptor
982 * lookup if interceptor failed.
983 */
984Object* LoadPropertyWithInterceptorForLoad(Arguments args) {
985  PropertyAttributes attr = NONE;
986  Object* result = LoadWithInterceptor(&args, &attr);
987  if (result->IsFailure()) return result;
988
989  // If the property is present, return it.
990  if (attr != ABSENT) return result;
991  return ThrowReferenceError(String::cast(args[0]));
992}
993
994
995Object* LoadPropertyWithInterceptorForCall(Arguments args) {
996  PropertyAttributes attr;
997  Object* result = LoadWithInterceptor(&args, &attr);
998  RETURN_IF_SCHEDULED_EXCEPTION();
999  // This is call IC. In this case, we simply return the undefined result which
1000  // will lead to an exception when trying to invoke the result as a
1001  // function.
1002  return result;
1003}
1004
1005
1006Object* StoreInterceptorProperty(Arguments args) {
1007  JSObject* recv = JSObject::cast(args[0]);
1008  String* name = String::cast(args[1]);
1009  Object* value = args[2];
1010  ASSERT(recv->HasNamedInterceptor());
1011  PropertyAttributes attr = NONE;
1012  Object* result = recv->SetPropertyWithInterceptor(name, value, attr);
1013  return result;
1014}
1015
1016
1017Object* KeyedLoadPropertyWithInterceptor(Arguments args) {
1018  JSObject* receiver = JSObject::cast(args[0]);
1019  uint32_t index = Smi::cast(args[1])->value();
1020  return receiver->GetElementWithInterceptor(receiver, index);
1021}
1022
1023
1024Object* StubCompiler::CompileCallInitialize(Code::Flags flags) {
1025  HandleScope scope;
1026  int argc = Code::ExtractArgumentsCountFromFlags(flags);
1027  Code::Kind kind = Code::ExtractKindFromFlags(flags);
1028  if (kind == Code::CALL_IC) {
1029    CallIC::GenerateInitialize(masm(), argc);
1030  } else {
1031    KeyedCallIC::GenerateInitialize(masm(), argc);
1032  }
1033  Object* result = GetCodeWithFlags(flags, "CompileCallInitialize");
1034  if (!result->IsFailure()) {
1035    Counters::call_initialize_stubs.Increment();
1036    Code* code = Code::cast(result);
1037    USE(code);
1038    PROFILE(CodeCreateEvent(CALL_LOGGER_TAG(kind, CALL_INITIALIZE_TAG),
1039                            code, code->arguments_count()));
1040  }
1041  return result;
1042}
1043
1044
1045Object* StubCompiler::CompileCallPreMonomorphic(Code::Flags flags) {
1046  HandleScope scope;
1047  int argc = Code::ExtractArgumentsCountFromFlags(flags);
1048  // The code of the PreMonomorphic stub is the same as the code
1049  // of the Initialized stub.  They just differ on the code object flags.
1050  Code::Kind kind = Code::ExtractKindFromFlags(flags);
1051  if (kind == Code::CALL_IC) {
1052    CallIC::GenerateInitialize(masm(), argc);
1053  } else {
1054    KeyedCallIC::GenerateInitialize(masm(), argc);
1055  }
1056  Object* result = GetCodeWithFlags(flags, "CompileCallPreMonomorphic");
1057  if (!result->IsFailure()) {
1058    Counters::call_premonomorphic_stubs.Increment();
1059    Code* code = Code::cast(result);
1060    USE(code);
1061    PROFILE(CodeCreateEvent(CALL_LOGGER_TAG(kind, CALL_PRE_MONOMORPHIC_TAG),
1062                            code, code->arguments_count()));
1063  }
1064  return result;
1065}
1066
1067
1068Object* StubCompiler::CompileCallNormal(Code::Flags flags) {
1069  HandleScope scope;
1070  int argc = Code::ExtractArgumentsCountFromFlags(flags);
1071  Code::Kind kind = Code::ExtractKindFromFlags(flags);
1072  if (kind == Code::CALL_IC) {
1073    CallIC::GenerateNormal(masm(), argc);
1074  } else {
1075    KeyedCallIC::GenerateNormal(masm(), argc);
1076  }
1077  Object* result = GetCodeWithFlags(flags, "CompileCallNormal");
1078  if (!result->IsFailure()) {
1079    Counters::call_normal_stubs.Increment();
1080    Code* code = Code::cast(result);
1081    USE(code);
1082    PROFILE(CodeCreateEvent(CALL_LOGGER_TAG(kind, CALL_NORMAL_TAG),
1083                            code, code->arguments_count()));
1084  }
1085  return result;
1086}
1087
1088
1089Object* StubCompiler::CompileCallMegamorphic(Code::Flags flags) {
1090  HandleScope scope;
1091  int argc = Code::ExtractArgumentsCountFromFlags(flags);
1092  Code::Kind kind = Code::ExtractKindFromFlags(flags);
1093  if (kind == Code::CALL_IC) {
1094    CallIC::GenerateMegamorphic(masm(), argc);
1095  } else {
1096    KeyedCallIC::GenerateMegamorphic(masm(), argc);
1097  }
1098
1099  Object* result = GetCodeWithFlags(flags, "CompileCallMegamorphic");
1100  if (!result->IsFailure()) {
1101    Counters::call_megamorphic_stubs.Increment();
1102    Code* code = Code::cast(result);
1103    USE(code);
1104    PROFILE(CodeCreateEvent(CALL_LOGGER_TAG(kind, CALL_MEGAMORPHIC_TAG),
1105                            code, code->arguments_count()));
1106  }
1107  return result;
1108}
1109
1110
1111Object* StubCompiler::CompileCallMiss(Code::Flags flags) {
1112  HandleScope scope;
1113  int argc = Code::ExtractArgumentsCountFromFlags(flags);
1114  Code::Kind kind = Code::ExtractKindFromFlags(flags);
1115  if (kind == Code::CALL_IC) {
1116    CallIC::GenerateMiss(masm(), argc);
1117  } else {
1118    KeyedCallIC::GenerateMiss(masm(), argc);
1119  }
1120  Object* result = GetCodeWithFlags(flags, "CompileCallMiss");
1121  if (!result->IsFailure()) {
1122    Counters::call_megamorphic_stubs.Increment();
1123    Code* code = Code::cast(result);
1124    USE(code);
1125    PROFILE(CodeCreateEvent(CALL_LOGGER_TAG(kind, CALL_MISS_TAG),
1126                            code, code->arguments_count()));
1127  }
1128  return result;
1129}
1130
1131
1132#ifdef ENABLE_DEBUGGER_SUPPORT
1133Object* StubCompiler::CompileCallDebugBreak(Code::Flags flags) {
1134  HandleScope scope;
1135  Debug::GenerateCallICDebugBreak(masm());
1136  Object* result = GetCodeWithFlags(flags, "CompileCallDebugBreak");
1137  if (!result->IsFailure()) {
1138    Code* code = Code::cast(result);
1139    USE(code);
1140    Code::Kind kind = Code::ExtractKindFromFlags(flags);
1141    USE(kind);
1142    PROFILE(CodeCreateEvent(CALL_LOGGER_TAG(kind, CALL_DEBUG_BREAK_TAG),
1143                            code, code->arguments_count()));
1144  }
1145  return result;
1146}
1147
1148
1149Object* StubCompiler::CompileCallDebugPrepareStepIn(Code::Flags flags) {
1150  HandleScope scope;
1151  // Use the same code for the the step in preparations as we do for
1152  // the miss case.
1153  int argc = Code::ExtractArgumentsCountFromFlags(flags);
1154  Code::Kind kind = Code::ExtractKindFromFlags(flags);
1155  if (kind == Code::CALL_IC) {
1156    CallIC::GenerateMiss(masm(), argc);
1157  } else {
1158    KeyedCallIC::GenerateMiss(masm(), argc);
1159  }
1160  Object* result = GetCodeWithFlags(flags, "CompileCallDebugPrepareStepIn");
1161  if (!result->IsFailure()) {
1162    Code* code = Code::cast(result);
1163    USE(code);
1164    PROFILE(CodeCreateEvent(
1165        CALL_LOGGER_TAG(kind, CALL_DEBUG_PREPARE_STEP_IN_TAG),
1166        code,
1167        code->arguments_count()));
1168  }
1169  return result;
1170}
1171#endif
1172
1173#undef CALL_LOGGER_TAG
1174
1175Object* StubCompiler::GetCodeWithFlags(Code::Flags flags, const char* name) {
1176  // Check for allocation failures during stub compilation.
1177  if (failure_->IsFailure()) return failure_;
1178
1179  // Create code object in the heap.
1180  CodeDesc desc;
1181  masm_.GetCode(&desc);
1182  Object* result = Heap::CreateCode(desc, flags, masm_.CodeObject());
1183#ifdef ENABLE_DISASSEMBLER
1184  if (FLAG_print_code_stubs && !result->IsFailure()) {
1185    Code::cast(result)->Disassemble(name);
1186  }
1187#endif
1188  return result;
1189}
1190
1191
1192Object* StubCompiler::GetCodeWithFlags(Code::Flags flags, String* name) {
1193  if (FLAG_print_code_stubs && (name != NULL)) {
1194    return GetCodeWithFlags(flags, *name->ToCString());
1195  }
1196  return GetCodeWithFlags(flags, reinterpret_cast<char*>(NULL));
1197}
1198
1199
1200void StubCompiler::LookupPostInterceptor(JSObject* holder,
1201                                         String* name,
1202                                         LookupResult* lookup) {
1203  holder->LocalLookupRealNamedProperty(name, lookup);
1204  if (!lookup->IsProperty()) {
1205    lookup->NotFound();
1206    Object* proto = holder->GetPrototype();
1207    if (proto != Heap::null_value()) {
1208      proto->Lookup(name, lookup);
1209    }
1210  }
1211}
1212
1213
1214
1215Object* LoadStubCompiler::GetCode(PropertyType type, String* name) {
1216  Code::Flags flags = Code::ComputeMonomorphicFlags(Code::LOAD_IC, type);
1217  return GetCodeWithFlags(flags, name);
1218}
1219
1220
1221Object* KeyedLoadStubCompiler::GetCode(PropertyType type, String* name) {
1222  Code::Flags flags = Code::ComputeMonomorphicFlags(Code::KEYED_LOAD_IC, type);
1223  return GetCodeWithFlags(flags, name);
1224}
1225
1226
1227Object* StoreStubCompiler::GetCode(PropertyType type, String* name) {
1228  Code::Flags flags = Code::ComputeMonomorphicFlags(Code::STORE_IC, type);
1229  return GetCodeWithFlags(flags, name);
1230}
1231
1232
1233Object* KeyedStoreStubCompiler::GetCode(PropertyType type, String* name) {
1234  Code::Flags flags = Code::ComputeMonomorphicFlags(Code::KEYED_STORE_IC, type);
1235  return GetCodeWithFlags(flags, name);
1236}
1237
1238
1239CallStubCompiler::CallStubCompiler(int argc,
1240                                   InLoopFlag in_loop,
1241                                   Code::Kind kind,
1242                                   InlineCacheHolderFlag cache_holder)
1243    : arguments_(argc)
1244    , in_loop_(in_loop)
1245    , kind_(kind)
1246    , cache_holder_(cache_holder) {
1247}
1248
1249
1250Object* CallStubCompiler::CompileCustomCall(int generator_id,
1251                                            Object* object,
1252                                            JSObject* holder,
1253                                            JSFunction* function,
1254                                            String* fname,
1255                                            CheckType check) {
1256    ASSERT(generator_id >= 0 && generator_id < kNumCallGenerators);
1257    switch (generator_id) {
1258#define CALL_GENERATOR_CASE(ignored1, ignored2, name)          \
1259      case k##name##CallGenerator:                             \
1260        return CallStubCompiler::Compile##name##Call(object,   \
1261                                                     holder,   \
1262                                                     function, \
1263                                                     fname,    \
1264                                                     check);
1265      CUSTOM_CALL_IC_GENERATORS(CALL_GENERATOR_CASE)
1266#undef CALL_GENERATOR_CASE
1267    }
1268    UNREACHABLE();
1269    return Heap::undefined_value();
1270}
1271
1272
1273Object* CallStubCompiler::GetCode(PropertyType type, String* name) {
1274  int argc = arguments_.immediate();
1275  Code::Flags flags = Code::ComputeMonomorphicFlags(kind_,
1276                                                    type,
1277                                                    cache_holder_,
1278                                                    in_loop_,
1279                                                    argc);
1280  return GetCodeWithFlags(flags, name);
1281}
1282
1283
1284Object* CallStubCompiler::GetCode(JSFunction* function) {
1285  String* function_name = NULL;
1286  if (function->shared()->name()->IsString()) {
1287    function_name = String::cast(function->shared()->name());
1288  }
1289  return GetCode(CONSTANT_FUNCTION, function_name);
1290}
1291
1292
1293Object* ConstructStubCompiler::GetCode() {
1294  Code::Flags flags = Code::ComputeFlags(Code::STUB);
1295  Object* result = GetCodeWithFlags(flags, "ConstructStub");
1296  if (!result->IsFailure()) {
1297    Code* code = Code::cast(result);
1298    USE(code);
1299    PROFILE(CodeCreateEvent(Logger::STUB_TAG, code, "ConstructStub"));
1300  }
1301  return result;
1302}
1303
1304
1305CallOptimization::CallOptimization(LookupResult* lookup) {
1306  if (!lookup->IsProperty() || !lookup->IsCacheable() ||
1307      lookup->type() != CONSTANT_FUNCTION) {
1308    Initialize(NULL);
1309  } else {
1310    // We only optimize constant function calls.
1311    Initialize(lookup->GetConstantFunction());
1312  }
1313}
1314
1315CallOptimization::CallOptimization(JSFunction* function) {
1316  Initialize(function);
1317}
1318
1319
1320int CallOptimization::GetPrototypeDepthOfExpectedType(JSObject* object,
1321                                                      JSObject* holder) const {
1322  ASSERT(is_simple_api_call_);
1323  if (expected_receiver_type_ == NULL) return 0;
1324  int depth = 0;
1325  while (object != holder) {
1326    if (object->IsInstanceOf(expected_receiver_type_)) return depth;
1327    object = JSObject::cast(object->GetPrototype());
1328    ++depth;
1329  }
1330  if (holder->IsInstanceOf(expected_receiver_type_)) return depth;
1331  return kInvalidProtoDepth;
1332}
1333
1334
1335void CallOptimization::Initialize(JSFunction* function) {
1336  constant_function_ = NULL;
1337  is_simple_api_call_ = false;
1338  expected_receiver_type_ = NULL;
1339  api_call_info_ = NULL;
1340
1341  if (function == NULL || !function->is_compiled()) return;
1342
1343  constant_function_ = function;
1344  AnalyzePossibleApiFunction(function);
1345}
1346
1347
1348void CallOptimization::AnalyzePossibleApiFunction(JSFunction* function) {
1349  SharedFunctionInfo* sfi = function->shared();
1350  if (!sfi->IsApiFunction()) return;
1351  FunctionTemplateInfo* info = sfi->get_api_func_data();
1352
1353  // Require a C++ callback.
1354  if (info->call_code()->IsUndefined()) return;
1355  api_call_info_ = CallHandlerInfo::cast(info->call_code());
1356
1357  // Accept signatures that either have no restrictions at all or
1358  // only have restrictions on the receiver.
1359  if (!info->signature()->IsUndefined()) {
1360    SignatureInfo* signature = SignatureInfo::cast(info->signature());
1361    if (!signature->args()->IsUndefined()) return;
1362    if (!signature->receiver()->IsUndefined()) {
1363      expected_receiver_type_ =
1364          FunctionTemplateInfo::cast(signature->receiver());
1365    }
1366  }
1367
1368  is_simple_api_call_ = true;
1369}
1370
1371
1372} }  // namespace v8::internal
1373