1 // Copyright 2012 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
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.
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.
33 #include "../include/v8-testing.h"
42 // Constants used in the implementation of the API. The most natural thing
43 // would usually be to place these with the classes that use them, but
44 // we want to keep them out of v8.h because it is an externally
49 FUNCTION_TEMPLATE = 0,
55 // Utilities for working with neander-objects, primitive
56 // env-independent JSObjects used by the api.
59 explicit NeanderObject(int size);
60 explicit inline NeanderObject(v8::internal::Handle<v8::internal::Object> obj);
61 explicit inline NeanderObject(v8::internal::Object* obj);
62 inline v8::internal::Object* get(int index);
63 inline void set(int index, v8::internal::Object* value);
64 inline v8::internal::Handle<v8::internal::JSObject> value() { return value_; }
67 v8::internal::Handle<v8::internal::JSObject> value_;
71 // Utilities for working with neander-arrays, a simple extensible
72 // array abstraction built on neander-objects.
76 explicit inline NeanderArray(v8::internal::Handle<v8::internal::Object> obj);
77 inline v8::internal::Handle<v8::internal::JSObject> value() {
81 void add(v8::internal::Handle<v8::internal::Object> value);
85 v8::internal::Object* get(int index);
86 // Change the value at an index to undefined value. If the index is
87 // out of bounds, the request is ignored. Returns the old value.
88 void set(int index, v8::internal::Object* value);
94 NeanderObject::NeanderObject(v8::internal::Handle<v8::internal::Object> obj)
95 : value_(v8::internal::Handle<v8::internal::JSObject>::cast(obj)) { }
98 NeanderObject::NeanderObject(v8::internal::Object* obj)
99 : value_(v8::internal::Handle<v8::internal::JSObject>(
100 v8::internal::JSObject::cast(obj))) { }
103 NeanderArray::NeanderArray(v8::internal::Handle<v8::internal::Object> obj)
107 v8::internal::Object* NeanderObject::get(int offset) {
108 ASSERT(value()->HasFastObjectElements());
109 return v8::internal::FixedArray::cast(value()->elements())->get(offset);
113 void NeanderObject::set(int offset, v8::internal::Object* value) {
114 ASSERT(value_->HasFastObjectElements());
115 v8::internal::FixedArray::cast(value_->elements())->set(offset, value);
119 template <typename T> inline T ToCData(v8::internal::Object* obj) {
120 STATIC_ASSERT(sizeof(T) == sizeof(v8::internal::Address));
121 return reinterpret_cast<T>(
122 reinterpret_cast<intptr_t>(
123 v8::internal::Foreign::cast(obj)->foreign_address()));
127 template <typename T>
128 inline v8::internal::Handle<v8::internal::Object> FromCData(
129 v8::internal::Isolate* isolate, T obj) {
130 STATIC_ASSERT(sizeof(T) == sizeof(v8::internal::Address));
131 return isolate->factory()->NewForeign(
132 reinterpret_cast<v8::internal::Address>(reinterpret_cast<intptr_t>(obj)));
138 explicit ApiFunction(v8::internal::Address addr) : addr_(addr) { }
139 v8::internal::Address address() { return addr_; }
141 v8::internal::Address addr_;
146 class RegisteredExtension {
148 explicit RegisteredExtension(Extension* extension);
149 static void Register(RegisteredExtension* that);
150 static void UnregisterAll();
151 Extension* extension() { return extension_; }
152 RegisteredExtension* next() { return next_; }
153 static RegisteredExtension* first_extension() { return first_extension_; }
155 Extension* extension_;
156 RegisteredExtension* next_;
157 static RegisteredExtension* first_extension_;
161 #define OPEN_HANDLE_LIST(V) \
162 V(Template, TemplateInfo) \
163 V(FunctionTemplate, FunctionTemplateInfo) \
164 V(ObjectTemplate, ObjectTemplateInfo) \
165 V(Signature, SignatureInfo) \
166 V(AccessorSignature, FunctionTemplateInfo) \
167 V(TypeSwitch, TypeSwitchInfo) \
169 V(RegExp, JSRegExp) \
170 V(Object, JSObject) \
172 V(ArrayBuffer, JSArrayBuffer) \
173 V(ArrayBufferView, JSArrayBufferView) \
174 V(TypedArray, JSTypedArray) \
175 V(Uint8Array, JSTypedArray) \
176 V(Uint8ClampedArray, JSTypedArray) \
177 V(Int8Array, JSTypedArray) \
178 V(Uint16Array, JSTypedArray) \
179 V(Int16Array, JSTypedArray) \
180 V(Uint32Array, JSTypedArray) \
181 V(Int32Array, JSTypedArray) \
182 V(Float32Array, JSTypedArray) \
183 V(Float64Array, JSTypedArray) \
184 V(DataView, JSDataView) \
188 V(Function, JSFunction) \
189 V(Message, JSObject) \
190 V(Context, Context) \
191 V(External, Foreign) \
192 V(StackTrace, JSArray) \
193 V(StackFrame, JSObject) \
194 V(DeclaredAccessorDescriptor, DeclaredAccessorDescriptor)
199 static bool ReportApiFailure(const char* location, const char* message);
201 static Local<FunctionTemplate> ToFunctionTemplate(NeanderObject obj);
202 static Local<ObjectTemplate> ToObjectTemplate(NeanderObject obj);
204 static inline Local<Context> ToLocal(
205 v8::internal::Handle<v8::internal::Context> obj);
206 static inline Local<Value> ToLocal(
207 v8::internal::Handle<v8::internal::Object> obj);
208 static inline Local<Function> ToLocal(
209 v8::internal::Handle<v8::internal::JSFunction> obj);
210 static inline Local<String> ToLocal(
211 v8::internal::Handle<v8::internal::String> obj);
212 static inline Local<Symbol> ToLocal(
213 v8::internal::Handle<v8::internal::Symbol> obj);
214 static inline Local<RegExp> ToLocal(
215 v8::internal::Handle<v8::internal::JSRegExp> obj);
216 static inline Local<Object> ToLocal(
217 v8::internal::Handle<v8::internal::JSObject> obj);
218 static inline Local<Array> ToLocal(
219 v8::internal::Handle<v8::internal::JSArray> obj);
220 static inline Local<ArrayBuffer> ToLocal(
221 v8::internal::Handle<v8::internal::JSArrayBuffer> obj);
222 static inline Local<ArrayBufferView> ToLocal(
223 v8::internal::Handle<v8::internal::JSArrayBufferView> obj);
224 static inline Local<DataView> ToLocal(
225 v8::internal::Handle<v8::internal::JSDataView> obj);
227 static inline Local<TypedArray> ToLocal(
228 v8::internal::Handle<v8::internal::JSTypedArray> obj);
229 static inline Local<Uint8Array> ToLocalUint8Array(
230 v8::internal::Handle<v8::internal::JSTypedArray> obj);
231 static inline Local<Uint8ClampedArray> ToLocalUint8ClampedArray(
232 v8::internal::Handle<v8::internal::JSTypedArray> obj);
233 static inline Local<Int8Array> ToLocalInt8Array(
234 v8::internal::Handle<v8::internal::JSTypedArray> obj);
235 static inline Local<Uint16Array> ToLocalUint16Array(
236 v8::internal::Handle<v8::internal::JSTypedArray> obj);
237 static inline Local<Int16Array> ToLocalInt16Array(
238 v8::internal::Handle<v8::internal::JSTypedArray> obj);
239 static inline Local<Uint32Array> ToLocalUint32Array(
240 v8::internal::Handle<v8::internal::JSTypedArray> obj);
241 static inline Local<Int32Array> ToLocalInt32Array(
242 v8::internal::Handle<v8::internal::JSTypedArray> obj);
243 static inline Local<Float32Array> ToLocalFloat32Array(
244 v8::internal::Handle<v8::internal::JSTypedArray> obj);
245 static inline Local<Float64Array> ToLocalFloat64Array(
246 v8::internal::Handle<v8::internal::JSTypedArray> obj);
248 static inline Local<Message> MessageToLocal(
249 v8::internal::Handle<v8::internal::Object> obj);
250 static inline Local<StackTrace> StackTraceToLocal(
251 v8::internal::Handle<v8::internal::JSArray> obj);
252 static inline Local<StackFrame> StackFrameToLocal(
253 v8::internal::Handle<v8::internal::JSObject> obj);
254 static inline Local<Number> NumberToLocal(
255 v8::internal::Handle<v8::internal::Object> obj);
256 static inline Local<Integer> IntegerToLocal(
257 v8::internal::Handle<v8::internal::Object> obj);
258 static inline Local<Uint32> Uint32ToLocal(
259 v8::internal::Handle<v8::internal::Object> obj);
260 static inline Local<FunctionTemplate> ToLocal(
261 v8::internal::Handle<v8::internal::FunctionTemplateInfo> obj);
262 static inline Local<ObjectTemplate> ToLocal(
263 v8::internal::Handle<v8::internal::ObjectTemplateInfo> obj);
264 static inline Local<Signature> ToLocal(
265 v8::internal::Handle<v8::internal::SignatureInfo> obj);
266 static inline Local<AccessorSignature> AccessorSignatureToLocal(
267 v8::internal::Handle<v8::internal::FunctionTemplateInfo> obj);
268 static inline Local<TypeSwitch> ToLocal(
269 v8::internal::Handle<v8::internal::TypeSwitchInfo> obj);
270 static inline Local<External> ExternalToLocal(
271 v8::internal::Handle<v8::internal::JSObject> obj);
272 static inline Local<DeclaredAccessorDescriptor> ToLocal(
273 v8::internal::Handle<v8::internal::DeclaredAccessorDescriptor> obj);
275 #define DECLARE_OPEN_HANDLE(From, To) \
276 static inline v8::internal::Handle<v8::internal::To> \
277 OpenHandle(const From* that, bool allow_empty_handle = false);
279 OPEN_HANDLE_LIST(DECLARE_OPEN_HANDLE)
281 #undef DECLARE_OPEN_HANDLE
283 template<class From, class To>
284 static inline Local<To> Convert(v8::internal::Handle<From> obj) {
285 ASSERT(obj.is_null() || !obj->IsTheHole());
286 return Local<To>(reinterpret_cast<To*>(obj.location()));
290 static inline v8::internal::Handle<v8::internal::Object> OpenPersistent(
291 const v8::Persistent<T>& persistent) {
292 return v8::internal::Handle<v8::internal::Object>(
293 reinterpret_cast<v8::internal::Object**>(persistent.val_));
297 static inline v8::internal::Handle<v8::internal::Object> OpenPersistent(
298 v8::Persistent<T>* persistent) {
299 return OpenPersistent(*persistent);
302 template <class From, class To>
303 static inline v8::internal::Handle<To> OpenHandle(v8::Local<From> handle) {
304 return OpenHandle(*handle);
310 v8::internal::Handle<T> v8::internal::Handle<T>::EscapeFrom(
311 v8::HandleScope* scope) {
312 v8::internal::Handle<T> handle;
316 return Utils::OpenHandle(*scope->Close(Utils::ToLocal(handle)), true);
321 inline T* ToApi(v8::internal::Handle<v8::internal::Object> obj) {
322 return reinterpret_cast<T*>(obj.location());
326 inline v8::Local<T> ToApiHandle(
327 v8::internal::Handle<v8::internal::Object> obj) {
328 return Utils::Convert<v8::internal::Object, T>(obj);
332 // Implementations of ToLocal
334 #define MAKE_TO_LOCAL(Name, From, To) \
335 Local<v8::To> Utils::Name(v8::internal::Handle<v8::internal::From> obj) { \
336 return Convert<v8::internal::From, v8::To>(obj); \
340 #define MAKE_TO_LOCAL_TYPED_ARRAY(TypedArray, typeConst) \
341 Local<v8::TypedArray> Utils::ToLocal##TypedArray( \
342 v8::internal::Handle<v8::internal::JSTypedArray> obj) { \
343 ASSERT(obj->type() == typeConst); \
344 return Convert<v8::internal::JSTypedArray, v8::TypedArray>(obj); \
348 MAKE_TO_LOCAL(ToLocal, Context, Context)
349 MAKE_TO_LOCAL(ToLocal, Object, Value)
350 MAKE_TO_LOCAL(ToLocal, JSFunction, Function)
351 MAKE_TO_LOCAL(ToLocal, String, String)
352 MAKE_TO_LOCAL(ToLocal, Symbol, Symbol)
353 MAKE_TO_LOCAL(ToLocal, JSRegExp, RegExp)
354 MAKE_TO_LOCAL(ToLocal, JSObject, Object)
355 MAKE_TO_LOCAL(ToLocal, JSArray, Array)
356 MAKE_TO_LOCAL(ToLocal, JSArrayBuffer, ArrayBuffer)
357 MAKE_TO_LOCAL(ToLocal, JSArrayBufferView, ArrayBufferView)
358 MAKE_TO_LOCAL(ToLocal, JSDataView, DataView)
359 MAKE_TO_LOCAL(ToLocal, JSTypedArray, TypedArray)
361 MAKE_TO_LOCAL_TYPED_ARRAY(Uint8Array, kExternalUnsignedByteArray)
362 MAKE_TO_LOCAL_TYPED_ARRAY(Uint8ClampedArray, kExternalPixelArray)
363 MAKE_TO_LOCAL_TYPED_ARRAY(Int8Array, kExternalByteArray)
364 MAKE_TO_LOCAL_TYPED_ARRAY(Uint16Array, kExternalUnsignedShortArray)
365 MAKE_TO_LOCAL_TYPED_ARRAY(Int16Array, kExternalShortArray)
366 MAKE_TO_LOCAL_TYPED_ARRAY(Uint32Array, kExternalUnsignedIntArray)
367 MAKE_TO_LOCAL_TYPED_ARRAY(Int32Array, kExternalIntArray)
368 MAKE_TO_LOCAL_TYPED_ARRAY(Float32Array, kExternalFloatArray)
369 MAKE_TO_LOCAL_TYPED_ARRAY(Float64Array, kExternalDoubleArray)
371 MAKE_TO_LOCAL(ToLocal, FunctionTemplateInfo, FunctionTemplate)
372 MAKE_TO_LOCAL(ToLocal, ObjectTemplateInfo, ObjectTemplate)
373 MAKE_TO_LOCAL(ToLocal, SignatureInfo, Signature)
374 MAKE_TO_LOCAL(AccessorSignatureToLocal, FunctionTemplateInfo, AccessorSignature)
375 MAKE_TO_LOCAL(ToLocal, TypeSwitchInfo, TypeSwitch)
376 MAKE_TO_LOCAL(MessageToLocal, Object, Message)
377 MAKE_TO_LOCAL(StackTraceToLocal, JSArray, StackTrace)
378 MAKE_TO_LOCAL(StackFrameToLocal, JSObject, StackFrame)
379 MAKE_TO_LOCAL(NumberToLocal, Object, Number)
380 MAKE_TO_LOCAL(IntegerToLocal, Object, Integer)
381 MAKE_TO_LOCAL(Uint32ToLocal, Object, Uint32)
382 MAKE_TO_LOCAL(ExternalToLocal, JSObject, External)
383 MAKE_TO_LOCAL(ToLocal, DeclaredAccessorDescriptor, DeclaredAccessorDescriptor)
385 #undef MAKE_TO_LOCAL_TYPED_ARRAY
389 // Implementations of OpenHandle
391 #define MAKE_OPEN_HANDLE(From, To) \
392 v8::internal::Handle<v8::internal::To> Utils::OpenHandle( \
393 const v8::From* that, bool allow_empty_handle) { \
394 EXTRA_CHECK(allow_empty_handle || that != NULL); \
395 EXTRA_CHECK(that == NULL || \
396 !(*reinterpret_cast<v8::internal::To**>( \
397 const_cast<v8::From*>(that)))->IsFailure()); \
398 return v8::internal::Handle<v8::internal::To>( \
399 reinterpret_cast<v8::internal::To**>(const_cast<v8::From*>(that))); \
402 OPEN_HANDLE_LIST(MAKE_OPEN_HANDLE)
404 #undef MAKE_OPEN_HANDLE
405 #undef OPEN_HANDLE_LIST
410 // Tracks string usage to help make better decisions when
411 // externalizing strings.
413 // Implementation note: internally this class only tracks fresh
414 // strings and keeps a single use counter for them.
415 class StringTracker {
417 // Records that the given string's characters were copied to some
418 // external buffer. If this happens often we should honor
419 // externalization requests for the string.
420 void RecordWrite(Handle<String> string) {
421 Address address = reinterpret_cast<Address>(*string);
422 Address top = isolate_->heap()->NewSpaceTop();
423 if (IsFreshString(address, top)) {
424 IncrementUseCount(top);
428 // Estimates freshness and use frequency of the given string based
429 // on how close it is to the new space top and the recorded usage
431 inline bool IsFreshUnusedString(Handle<String> string) {
432 Address address = reinterpret_cast<Address>(*string);
433 Address top = isolate_->heap()->NewSpaceTop();
434 return IsFreshString(address, top) && IsUseCountLow(top);
438 StringTracker() : use_count_(0), last_top_(NULL), isolate_(NULL) { }
440 static inline bool IsFreshString(Address string, Address top) {
441 return top - kFreshnessLimit <= string && string <= top;
444 inline bool IsUseCountLow(Address top) {
445 if (last_top_ != top) return true;
446 return use_count_ < kUseLimit;
449 inline void IncrementUseCount(Address top) {
450 if (last_top_ != top) {
457 // Single use counter shared by all fresh strings.
460 // Last new space top when the use count above was valid.
465 // How close to the new space top a fresh string has to be.
466 static const int kFreshnessLimit = 1024;
468 // The number of uses required to consider a string useful.
469 static const int kUseLimit = 32;
471 friend class Isolate;
473 DISALLOW_COPY_AND_ASSIGN(StringTracker);
477 class DeferredHandles {
482 DeferredHandles(Object** first_block_limit, Isolate* isolate)
485 first_block_limit_(first_block_limit),
487 isolate->LinkDeferredHandles(this);
490 void Iterate(ObjectVisitor* v);
492 List<Object**> blocks_;
493 DeferredHandles* next_;
494 DeferredHandles* previous_;
495 Object** first_block_limit_;
498 friend class HandleScopeImplementer;
499 friend class Isolate;
503 // This class is here in order to be able to declare it a friend of
504 // HandleScope. Moving these methods to be members of HandleScope would be
505 // neat in some ways, but it would expose internal implementation details in
506 // our public header file, which is undesirable.
508 // An isolate has a single instance of this class to hold the current thread's
509 // data. In multithreaded V8 programs this data is copied in and out of storage
510 // so that the currently executing thread always has its own copy of this
512 class HandleScopeImplementer {
514 explicit HandleScopeImplementer(Isolate* isolate)
517 entered_contexts_(0),
521 last_handle_before_deferred_block_(NULL) { }
523 ~HandleScopeImplementer() {
527 // Threading support for handle data.
528 static int ArchiveSpacePerThread();
529 char* RestoreThread(char* from);
530 char* ArchiveThread(char* to);
531 void FreeThreadResources();
533 // Garbage collection support.
534 void Iterate(v8::internal::ObjectVisitor* v);
535 static char* Iterate(v8::internal::ObjectVisitor* v, char* data);
538 inline internal::Object** GetSpareOrNewBlock();
539 inline void DeleteExtensions(internal::Object** prev_limit);
541 inline void IncrementCallDepth() {call_depth_++;}
542 inline void DecrementCallDepth() {call_depth_--;}
543 inline bool CallDepthIsZero() { return call_depth_ == 0; }
545 inline void EnterContext(Handle<Context> context);
546 inline bool LeaveContext(Handle<Context> context);
548 // Returns the last entered context or an empty handle if no
549 // contexts have been entered.
550 inline Handle<Context> LastEnteredContext();
552 inline void SaveContext(Context* context);
553 inline Context* RestoreContext();
554 inline bool HasSavedContexts();
556 inline List<internal::Object**>* blocks() { return &blocks_; }
557 Isolate* isolate() const { return isolate_; }
559 void ReturnBlock(Object** block) {
560 ASSERT(block != NULL);
561 if (spare_ != NULL) DeleteArray(spare_);
566 void ResetAfterArchive() {
567 blocks_.Initialize(0);
568 entered_contexts_.Initialize(0);
569 saved_contexts_.Initialize(0);
571 last_handle_before_deferred_block_ = NULL;
576 ASSERT(blocks_.length() == 0);
577 ASSERT(entered_contexts_.length() == 0);
578 ASSERT(saved_contexts_.length() == 0);
580 entered_contexts_.Free();
581 saved_contexts_.Free();
582 if (spare_ != NULL) {
586 ASSERT(call_depth_ == 0);
589 void BeginDeferredScope();
590 DeferredHandles* Detach(Object** prev_limit);
593 List<internal::Object**> blocks_;
594 // Used as a stack to keep track of entered contexts.
595 List<Context*> entered_contexts_;
596 // Used as a stack to keep track of saved contexts.
597 List<Context*> saved_contexts_;
600 Object** last_handle_before_deferred_block_;
601 // This is only used for threading support.
602 v8::ImplementationUtilities::HandleScopeData handle_scope_data_;
604 void IterateThis(ObjectVisitor* v);
605 char* RestoreThreadHelper(char* from);
606 char* ArchiveThreadHelper(char* to);
608 friend class DeferredHandles;
609 friend class DeferredHandleScope;
611 DISALLOW_COPY_AND_ASSIGN(HandleScopeImplementer);
615 const int kHandleBlockSize = v8::internal::KB - 2; // fit in one page
618 void HandleScopeImplementer::SaveContext(Context* context) {
619 saved_contexts_.Add(context);
623 Context* HandleScopeImplementer::RestoreContext() {
624 return saved_contexts_.RemoveLast();
628 bool HandleScopeImplementer::HasSavedContexts() {
629 return !saved_contexts_.is_empty();
633 void HandleScopeImplementer::EnterContext(Handle<Context> context) {
634 entered_contexts_.Add(*context);
638 bool HandleScopeImplementer::LeaveContext(Handle<Context> context) {
639 if (entered_contexts_.is_empty()) return false;
640 // TODO(dcarney): figure out what's wrong here
641 // if (entered_contexts_.last() != *context) return false;
642 entered_contexts_.RemoveLast();
647 Handle<Context> HandleScopeImplementer::LastEnteredContext() {
648 if (entered_contexts_.is_empty()) return Handle<Context>::null();
649 return Handle<Context>(entered_contexts_.last());
653 // If there's a spare block, use it for growing the current scope.
654 internal::Object** HandleScopeImplementer::GetSpareOrNewBlock() {
655 internal::Object** block = (spare_ != NULL) ?
657 NewArray<internal::Object*>(kHandleBlockSize);
663 void HandleScopeImplementer::DeleteExtensions(internal::Object** prev_limit) {
664 while (!blocks_.is_empty()) {
665 internal::Object** block_start = blocks_.last();
666 internal::Object** block_limit = block_start + kHandleBlockSize;
668 // SealHandleScope may make the prev_limit to point inside the block.
669 if (block_start <= prev_limit && prev_limit <= block_limit) {
670 #ifdef ENABLE_HANDLE_ZAPPING
671 internal::HandleScope::ZapRange(prev_limit, block_limit);
676 if (prev_limit == block_limit) break;
679 blocks_.RemoveLast();
680 #ifdef ENABLE_HANDLE_ZAPPING
681 internal::HandleScope::ZapRange(block_start, block_limit);
683 if (spare_ != NULL) {
686 spare_ = block_start;
688 ASSERT((blocks_.is_empty() && prev_limit == NULL) ||
689 (!blocks_.is_empty() && prev_limit != NULL));
693 // Interceptor functions called from generated inline caches to notify
694 // CPU profiler that external callbacks are invoked.
695 void InvokeAccessorGetterCallback(
696 v8::Local<v8::String> property,
697 const v8::PropertyCallbackInfo<v8::Value>& info,
698 v8::AccessorGetterCallback getter);
700 void InvokeFunctionCallback(const v8::FunctionCallbackInfo<v8::Value>& info,
701 v8::FunctionCallback callback);
705 static v8::Testing::StressType stress_type() { return stress_type_; }
706 static void set_stress_type(v8::Testing::StressType stress_type) {
707 stress_type_ = stress_type;
711 static v8::Testing::StressType stress_type_;
714 } } // namespace v8::internal