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
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 <stdlib.h>
29
30#include "v8.h"
31
32#include "ast.h"
33#include "bootstrapper.h"
34#include "codegen.h"
35#include "compilation-cache.h"
36#include "debug.h"
37#include "deoptimizer.h"
38#include "heap-profiler.h"
39#include "hydrogen.h"
40#include "isolate.h"
41#include "lithium-allocator.h"
42#include "log.h"
43#include "messages.h"
44#include "platform.h"
45#include "regexp-stack.h"
46#include "runtime-profiler.h"
47#include "scopeinfo.h"
48#include "serialize.h"
49#include "simulator.h"
50#include "spaces.h"
51#include "stub-cache.h"
52#include "version.h"
53#include "vm-state-inl.h"
54
55
56namespace v8 {
57namespace internal {
58
59Atomic32 ThreadId::highest_thread_id_ = 0;
60
61int ThreadId::AllocateThreadId() {
62  int new_id = NoBarrier_AtomicIncrement(&highest_thread_id_, 1);
63  return new_id;
64}
65
66
67int ThreadId::GetCurrentThreadId() {
68  int thread_id = Thread::GetThreadLocalInt(Isolate::thread_id_key_);
69  if (thread_id == 0) {
70    thread_id = AllocateThreadId();
71    Thread::SetThreadLocalInt(Isolate::thread_id_key_, thread_id);
72  }
73  return thread_id;
74}
75
76
77ThreadLocalTop::ThreadLocalTop() {
78  InitializeInternal();
79  // This flag may be set using v8::V8::IgnoreOutOfMemoryException()
80  // before an isolate is initialized. The initialize methods below do
81  // not touch it to preserve its value.
82  ignore_out_of_memory_ = false;
83}
84
85
86void ThreadLocalTop::InitializeInternal() {
87  c_entry_fp_ = 0;
88  handler_ = 0;
89#ifdef USE_SIMULATOR
90  simulator_ = NULL;
91#endif
92  js_entry_sp_ = NULL;
93  external_callback_ = NULL;
94  current_vm_state_ = EXTERNAL;
95  try_catch_handler_address_ = NULL;
96  context_ = NULL;
97  thread_id_ = ThreadId::Invalid();
98  external_caught_exception_ = false;
99  failed_access_check_callback_ = NULL;
100  save_context_ = NULL;
101  catcher_ = NULL;
102  top_lookup_result_ = NULL;
103
104  // These members are re-initialized later after deserialization
105  // is complete.
106  pending_exception_ = NULL;
107  has_pending_message_ = false;
108  pending_message_obj_ = NULL;
109  pending_message_script_ = NULL;
110  scheduled_exception_ = NULL;
111}
112
113
114void ThreadLocalTop::Initialize() {
115  InitializeInternal();
116#ifdef USE_SIMULATOR
117#ifdef V8_TARGET_ARCH_ARM
118  simulator_ = Simulator::current(isolate_);
119#elif V8_TARGET_ARCH_MIPS
120  simulator_ = Simulator::current(isolate_);
121#endif
122#endif
123  thread_id_ = ThreadId::Current();
124}
125
126
127v8::TryCatch* ThreadLocalTop::TryCatchHandler() {
128  return TRY_CATCH_FROM_ADDRESS(try_catch_handler_address());
129}
130
131
132// Create a dummy thread that will wait forever on a semaphore. The only
133// purpose for this thread is to have some stack area to save essential data
134// into for use by a stacks only core dump (aka minidump).
135class PreallocatedMemoryThread: public Thread {
136 public:
137  char* data() {
138    if (data_ready_semaphore_ != NULL) {
139      // Initial access is guarded until the data has been published.
140      data_ready_semaphore_->Wait();
141      delete data_ready_semaphore_;
142      data_ready_semaphore_ = NULL;
143    }
144    return data_;
145  }
146
147  unsigned length() {
148    if (data_ready_semaphore_ != NULL) {
149      // Initial access is guarded until the data has been published.
150      data_ready_semaphore_->Wait();
151      delete data_ready_semaphore_;
152      data_ready_semaphore_ = NULL;
153    }
154    return length_;
155  }
156
157  // Stop the PreallocatedMemoryThread and release its resources.
158  void StopThread() {
159    keep_running_ = false;
160    wait_for_ever_semaphore_->Signal();
161
162    // Wait for the thread to terminate.
163    Join();
164
165    if (data_ready_semaphore_ != NULL) {
166      delete data_ready_semaphore_;
167      data_ready_semaphore_ = NULL;
168    }
169
170    delete wait_for_ever_semaphore_;
171    wait_for_ever_semaphore_ = NULL;
172  }
173
174 protected:
175  // When the thread starts running it will allocate a fixed number of bytes
176  // on the stack and publish the location of this memory for others to use.
177  void Run() {
178    EmbeddedVector<char, 15 * 1024> local_buffer;
179
180    // Initialize the buffer with a known good value.
181    OS::StrNCpy(local_buffer, "Trace data was not generated.\n",
182                local_buffer.length());
183
184    // Publish the local buffer and signal its availability.
185    data_ = local_buffer.start();
186    length_ = local_buffer.length();
187    data_ready_semaphore_->Signal();
188
189    while (keep_running_) {
190      // This thread will wait here until the end of time.
191      wait_for_ever_semaphore_->Wait();
192    }
193
194    // Make sure we access the buffer after the wait to remove all possibility
195    // of it being optimized away.
196    OS::StrNCpy(local_buffer, "PreallocatedMemoryThread shutting down.\n",
197                local_buffer.length());
198  }
199
200
201 private:
202  PreallocatedMemoryThread()
203      : Thread("v8:PreallocMem"),
204        keep_running_(true),
205        wait_for_ever_semaphore_(OS::CreateSemaphore(0)),
206        data_ready_semaphore_(OS::CreateSemaphore(0)),
207        data_(NULL),
208        length_(0) {
209  }
210
211  // Used to make sure that the thread keeps looping even for spurious wakeups.
212  bool keep_running_;
213
214  // This semaphore is used by the PreallocatedMemoryThread to wait for ever.
215  Semaphore* wait_for_ever_semaphore_;
216  // Semaphore to signal that the data has been initialized.
217  Semaphore* data_ready_semaphore_;
218
219  // Location and size of the preallocated memory block.
220  char* data_;
221  unsigned length_;
222
223  friend class Isolate;
224
225  DISALLOW_COPY_AND_ASSIGN(PreallocatedMemoryThread);
226};
227
228
229void Isolate::PreallocatedMemoryThreadStart() {
230  if (preallocated_memory_thread_ != NULL) return;
231  preallocated_memory_thread_ = new PreallocatedMemoryThread();
232  preallocated_memory_thread_->Start();
233}
234
235
236void Isolate::PreallocatedMemoryThreadStop() {
237  if (preallocated_memory_thread_ == NULL) return;
238  preallocated_memory_thread_->StopThread();
239  // Done with the thread entirely.
240  delete preallocated_memory_thread_;
241  preallocated_memory_thread_ = NULL;
242}
243
244
245void Isolate::PreallocatedStorageInit(size_t size) {
246  ASSERT(free_list_.next_ == &free_list_);
247  ASSERT(free_list_.previous_ == &free_list_);
248  PreallocatedStorage* free_chunk =
249      reinterpret_cast<PreallocatedStorage*>(new char[size]);
250  free_list_.next_ = free_list_.previous_ = free_chunk;
251  free_chunk->next_ = free_chunk->previous_ = &free_list_;
252  free_chunk->size_ = size - sizeof(PreallocatedStorage);
253  preallocated_storage_preallocated_ = true;
254}
255
256
257void* Isolate::PreallocatedStorageNew(size_t size) {
258  if (!preallocated_storage_preallocated_) {
259    return FreeStoreAllocationPolicy::New(size);
260  }
261  ASSERT(free_list_.next_ != &free_list_);
262  ASSERT(free_list_.previous_ != &free_list_);
263
264  size = (size + kPointerSize - 1) & ~(kPointerSize - 1);
265  // Search for exact fit.
266  for (PreallocatedStorage* storage = free_list_.next_;
267       storage != &free_list_;
268       storage = storage->next_) {
269    if (storage->size_ == size) {
270      storage->Unlink();
271      storage->LinkTo(&in_use_list_);
272      return reinterpret_cast<void*>(storage + 1);
273    }
274  }
275  // Search for first fit.
276  for (PreallocatedStorage* storage = free_list_.next_;
277       storage != &free_list_;
278       storage = storage->next_) {
279    if (storage->size_ >= size + sizeof(PreallocatedStorage)) {
280      storage->Unlink();
281      storage->LinkTo(&in_use_list_);
282      PreallocatedStorage* left_over =
283          reinterpret_cast<PreallocatedStorage*>(
284              reinterpret_cast<char*>(storage + 1) + size);
285      left_over->size_ = storage->size_ - size - sizeof(PreallocatedStorage);
286      ASSERT(size + left_over->size_ + sizeof(PreallocatedStorage) ==
287             storage->size_);
288      storage->size_ = size;
289      left_over->LinkTo(&free_list_);
290      return reinterpret_cast<void*>(storage + 1);
291    }
292  }
293  // Allocation failure.
294  ASSERT(false);
295  return NULL;
296}
297
298
299// We don't attempt to coalesce.
300void Isolate::PreallocatedStorageDelete(void* p) {
301  if (p == NULL) {
302    return;
303  }
304  if (!preallocated_storage_preallocated_) {
305    FreeStoreAllocationPolicy::Delete(p);
306    return;
307  }
308  PreallocatedStorage* storage = reinterpret_cast<PreallocatedStorage*>(p) - 1;
309  ASSERT(storage->next_->previous_ == storage);
310  ASSERT(storage->previous_->next_ == storage);
311  storage->Unlink();
312  storage->LinkTo(&free_list_);
313}
314
315Isolate* Isolate::default_isolate_ = NULL;
316Thread::LocalStorageKey Isolate::isolate_key_;
317Thread::LocalStorageKey Isolate::thread_id_key_;
318Thread::LocalStorageKey Isolate::per_isolate_thread_data_key_;
319Mutex* Isolate::process_wide_mutex_ = OS::CreateMutex();
320Isolate::ThreadDataTable* Isolate::thread_data_table_ = NULL;
321
322
323Isolate::PerIsolateThreadData* Isolate::AllocatePerIsolateThreadData(
324    ThreadId thread_id) {
325  ASSERT(!thread_id.Equals(ThreadId::Invalid()));
326  PerIsolateThreadData* per_thread = new PerIsolateThreadData(this, thread_id);
327  {
328    ScopedLock lock(process_wide_mutex_);
329    ASSERT(thread_data_table_->Lookup(this, thread_id) == NULL);
330    thread_data_table_->Insert(per_thread);
331    ASSERT(thread_data_table_->Lookup(this, thread_id) == per_thread);
332  }
333  return per_thread;
334}
335
336
337Isolate::PerIsolateThreadData*
338    Isolate::FindOrAllocatePerThreadDataForThisThread() {
339  ThreadId thread_id = ThreadId::Current();
340  PerIsolateThreadData* per_thread = NULL;
341  {
342    ScopedLock lock(process_wide_mutex_);
343    per_thread = thread_data_table_->Lookup(this, thread_id);
344    if (per_thread == NULL) {
345      per_thread = AllocatePerIsolateThreadData(thread_id);
346    }
347  }
348  return per_thread;
349}
350
351
352Isolate::PerIsolateThreadData* Isolate::FindPerThreadDataForThisThread() {
353  ThreadId thread_id = ThreadId::Current();
354  PerIsolateThreadData* per_thread = NULL;
355  {
356    ScopedLock lock(process_wide_mutex_);
357    per_thread = thread_data_table_->Lookup(this, thread_id);
358  }
359  return per_thread;
360}
361
362
363void Isolate::EnsureDefaultIsolate() {
364  ScopedLock lock(process_wide_mutex_);
365  if (default_isolate_ == NULL) {
366    isolate_key_ = Thread::CreateThreadLocalKey();
367    thread_id_key_ = Thread::CreateThreadLocalKey();
368    per_isolate_thread_data_key_ = Thread::CreateThreadLocalKey();
369    thread_data_table_ = new Isolate::ThreadDataTable();
370    default_isolate_ = new Isolate();
371  }
372  // Can't use SetIsolateThreadLocals(default_isolate_, NULL) here
373  // because a non-null thread data may be already set.
374  if (Thread::GetThreadLocal(isolate_key_) == NULL) {
375    Thread::SetThreadLocal(isolate_key_, default_isolate_);
376  }
377}
378
379struct StaticInitializer {
380  StaticInitializer() {
381    Isolate::EnsureDefaultIsolate();
382  }
383} static_initializer;
384
385#ifdef ENABLE_DEBUGGER_SUPPORT
386Debugger* Isolate::GetDefaultIsolateDebugger() {
387  EnsureDefaultIsolate();
388  return default_isolate_->debugger();
389}
390#endif
391
392
393StackGuard* Isolate::GetDefaultIsolateStackGuard() {
394  EnsureDefaultIsolate();
395  return default_isolate_->stack_guard();
396}
397
398
399void Isolate::EnterDefaultIsolate() {
400  EnsureDefaultIsolate();
401  ASSERT(default_isolate_ != NULL);
402
403  PerIsolateThreadData* data = CurrentPerIsolateThreadData();
404  // If not yet in default isolate - enter it.
405  if (data == NULL || data->isolate() != default_isolate_) {
406    default_isolate_->Enter();
407  }
408}
409
410
411Isolate* Isolate::GetDefaultIsolateForLocking() {
412  EnsureDefaultIsolate();
413  return default_isolate_;
414}
415
416
417Address Isolate::get_address_from_id(Isolate::AddressId id) {
418  return isolate_addresses_[id];
419}
420
421
422char* Isolate::Iterate(ObjectVisitor* v, char* thread_storage) {
423  ThreadLocalTop* thread = reinterpret_cast<ThreadLocalTop*>(thread_storage);
424  Iterate(v, thread);
425  return thread_storage + sizeof(ThreadLocalTop);
426}
427
428
429void Isolate::IterateThread(ThreadVisitor* v) {
430  v->VisitThread(this, thread_local_top());
431}
432
433
434void Isolate::IterateThread(ThreadVisitor* v, char* t) {
435  ThreadLocalTop* thread = reinterpret_cast<ThreadLocalTop*>(t);
436  v->VisitThread(this, thread);
437}
438
439
440void Isolate::Iterate(ObjectVisitor* v, ThreadLocalTop* thread) {
441  // Visit the roots from the top for a given thread.
442  Object* pending;
443  // The pending exception can sometimes be a failure.  We can't show
444  // that to the GC, which only understands objects.
445  if (thread->pending_exception_->ToObject(&pending)) {
446    v->VisitPointer(&pending);
447    thread->pending_exception_ = pending;  // In case GC updated it.
448  }
449  v->VisitPointer(&(thread->pending_message_obj_));
450  v->VisitPointer(BitCast<Object**>(&(thread->pending_message_script_)));
451  v->VisitPointer(BitCast<Object**>(&(thread->context_)));
452  Object* scheduled;
453  if (thread->scheduled_exception_->ToObject(&scheduled)) {
454    v->VisitPointer(&scheduled);
455    thread->scheduled_exception_ = scheduled;
456  }
457
458  for (v8::TryCatch* block = thread->TryCatchHandler();
459       block != NULL;
460       block = TRY_CATCH_FROM_ADDRESS(block->next_)) {
461    v->VisitPointer(BitCast<Object**>(&(block->exception_)));
462    v->VisitPointer(BitCast<Object**>(&(block->message_)));
463  }
464
465  // Iterate over pointers on native execution stack.
466  for (StackFrameIterator it(this, thread); !it.done(); it.Advance()) {
467    it.frame()->Iterate(v);
468  }
469
470  // Iterate pointers in live lookup results.
471  thread->top_lookup_result_->Iterate(v);
472}
473
474
475void Isolate::Iterate(ObjectVisitor* v) {
476  ThreadLocalTop* current_t = thread_local_top();
477  Iterate(v, current_t);
478}
479
480
481void Isolate::RegisterTryCatchHandler(v8::TryCatch* that) {
482  // The ARM simulator has a separate JS stack.  We therefore register
483  // the C++ try catch handler with the simulator and get back an
484  // address that can be used for comparisons with addresses into the
485  // JS stack.  When running without the simulator, the address
486  // returned will be the address of the C++ try catch handler itself.
487  Address address = reinterpret_cast<Address>(
488      SimulatorStack::RegisterCTryCatch(reinterpret_cast<uintptr_t>(that)));
489  thread_local_top()->set_try_catch_handler_address(address);
490}
491
492
493void Isolate::UnregisterTryCatchHandler(v8::TryCatch* that) {
494  ASSERT(thread_local_top()->TryCatchHandler() == that);
495  thread_local_top()->set_try_catch_handler_address(
496      reinterpret_cast<Address>(that->next_));
497  thread_local_top()->catcher_ = NULL;
498  SimulatorStack::UnregisterCTryCatch();
499}
500
501
502Handle<String> Isolate::StackTraceString() {
503  if (stack_trace_nesting_level_ == 0) {
504    stack_trace_nesting_level_++;
505    HeapStringAllocator allocator;
506    StringStream::ClearMentionedObjectCache();
507    StringStream accumulator(&allocator);
508    incomplete_message_ = &accumulator;
509    PrintStack(&accumulator);
510    Handle<String> stack_trace = accumulator.ToString();
511    incomplete_message_ = NULL;
512    stack_trace_nesting_level_ = 0;
513    return stack_trace;
514  } else if (stack_trace_nesting_level_ == 1) {
515    stack_trace_nesting_level_++;
516    OS::PrintError(
517      "\n\nAttempt to print stack while printing stack (double fault)\n");
518    OS::PrintError(
519      "If you are lucky you may find a partial stack dump on stdout.\n\n");
520    incomplete_message_->OutputToStdOut();
521    return factory()->empty_symbol();
522  } else {
523    OS::Abort();
524    // Unreachable
525    return factory()->empty_symbol();
526  }
527}
528
529
530void Isolate::CaptureAndSetCurrentStackTraceFor(Handle<JSObject> error_object) {
531  if (capture_stack_trace_for_uncaught_exceptions_) {
532    // Capture stack trace for a detailed exception message.
533    Handle<String> key = factory()->hidden_stack_trace_symbol();
534    Handle<JSArray> stack_trace = CaptureCurrentStackTrace(
535        stack_trace_for_uncaught_exceptions_frame_limit_,
536        stack_trace_for_uncaught_exceptions_options_);
537    JSObject::SetHiddenProperty(error_object, key, stack_trace);
538  }
539}
540
541
542Handle<JSArray> Isolate::CaptureCurrentStackTrace(
543    int frame_limit, StackTrace::StackTraceOptions options) {
544  // Ensure no negative values.
545  int limit = Max(frame_limit, 0);
546  Handle<JSArray> stack_trace = factory()->NewJSArray(frame_limit);
547
548  Handle<String> column_key = factory()->LookupAsciiSymbol("column");
549  Handle<String> line_key = factory()->LookupAsciiSymbol("lineNumber");
550  Handle<String> script_key = factory()->LookupAsciiSymbol("scriptName");
551  Handle<String> name_or_source_url_key =
552      factory()->LookupAsciiSymbol("nameOrSourceURL");
553  Handle<String> script_name_or_source_url_key =
554      factory()->LookupAsciiSymbol("scriptNameOrSourceURL");
555  Handle<String> function_key = factory()->LookupAsciiSymbol("functionName");
556  Handle<String> eval_key = factory()->LookupAsciiSymbol("isEval");
557  Handle<String> constructor_key =
558      factory()->LookupAsciiSymbol("isConstructor");
559
560  StackTraceFrameIterator it(this);
561  int frames_seen = 0;
562  while (!it.done() && (frames_seen < limit)) {
563    JavaScriptFrame* frame = it.frame();
564    // Set initial size to the maximum inlining level + 1 for the outermost
565    // function.
566    List<FrameSummary> frames(Compiler::kMaxInliningLevels + 1);
567    frame->Summarize(&frames);
568    for (int i = frames.length() - 1; i >= 0 && frames_seen < limit; i--) {
569      // Create a JSObject to hold the information for the StackFrame.
570      Handle<JSObject> stack_frame = factory()->NewJSObject(object_function());
571
572      Handle<JSFunction> fun = frames[i].function();
573      Handle<Script> script(Script::cast(fun->shared()->script()));
574
575      if (options & StackTrace::kLineNumber) {
576        int script_line_offset = script->line_offset()->value();
577        int position = frames[i].code()->SourcePosition(frames[i].pc());
578        int line_number = GetScriptLineNumber(script, position);
579        // line_number is already shifted by the script_line_offset.
580        int relative_line_number = line_number - script_line_offset;
581        if (options & StackTrace::kColumnOffset && relative_line_number >= 0) {
582          Handle<FixedArray> line_ends(FixedArray::cast(script->line_ends()));
583          int start = (relative_line_number == 0) ? 0 :
584              Smi::cast(line_ends->get(relative_line_number - 1))->value() + 1;
585          int column_offset = position - start;
586          if (relative_line_number == 0) {
587            // For the case where the code is on the same line as the script
588            // tag.
589            column_offset += script->column_offset()->value();
590          }
591          CHECK_NOT_EMPTY_HANDLE(
592              this,
593              JSObject::SetLocalPropertyIgnoreAttributes(
594                  stack_frame, column_key,
595                  Handle<Smi>(Smi::FromInt(column_offset + 1)), NONE));
596        }
597        CHECK_NOT_EMPTY_HANDLE(
598            this,
599            JSObject::SetLocalPropertyIgnoreAttributes(
600                stack_frame, line_key,
601                Handle<Smi>(Smi::FromInt(line_number + 1)), NONE));
602      }
603
604      if (options & StackTrace::kScriptName) {
605        Handle<Object> script_name(script->name(), this);
606        CHECK_NOT_EMPTY_HANDLE(this,
607                               JSObject::SetLocalPropertyIgnoreAttributes(
608                                   stack_frame, script_key, script_name, NONE));
609      }
610
611      if (options & StackTrace::kScriptNameOrSourceURL) {
612        Handle<Object> script_name(script->name(), this);
613        Handle<JSValue> script_wrapper = GetScriptWrapper(script);
614        Handle<Object> property = GetProperty(script_wrapper,
615                                              name_or_source_url_key);
616        ASSERT(property->IsJSFunction());
617        Handle<JSFunction> method = Handle<JSFunction>::cast(property);
618        bool caught_exception;
619        Handle<Object> result = Execution::TryCall(method, script_wrapper, 0,
620                                                   NULL, &caught_exception);
621        if (caught_exception) {
622          result = factory()->undefined_value();
623        }
624        CHECK_NOT_EMPTY_HANDLE(this,
625                               JSObject::SetLocalPropertyIgnoreAttributes(
626                                   stack_frame, script_name_or_source_url_key,
627                                   result, NONE));
628      }
629
630      if (options & StackTrace::kFunctionName) {
631        Handle<Object> fun_name(fun->shared()->name(), this);
632        if (fun_name->ToBoolean()->IsFalse()) {
633          fun_name = Handle<Object>(fun->shared()->inferred_name(), this);
634        }
635        CHECK_NOT_EMPTY_HANDLE(this,
636                               JSObject::SetLocalPropertyIgnoreAttributes(
637                                   stack_frame, function_key, fun_name, NONE));
638      }
639
640      if (options & StackTrace::kIsEval) {
641        int type = Smi::cast(script->compilation_type())->value();
642        Handle<Object> is_eval = (type == Script::COMPILATION_TYPE_EVAL) ?
643            factory()->true_value() : factory()->false_value();
644        CHECK_NOT_EMPTY_HANDLE(this,
645                               JSObject::SetLocalPropertyIgnoreAttributes(
646                                   stack_frame, eval_key, is_eval, NONE));
647      }
648
649      if (options & StackTrace::kIsConstructor) {
650        Handle<Object> is_constructor = (frames[i].is_constructor()) ?
651            factory()->true_value() : factory()->false_value();
652        CHECK_NOT_EMPTY_HANDLE(this,
653                               JSObject::SetLocalPropertyIgnoreAttributes(
654                                   stack_frame, constructor_key,
655                                   is_constructor, NONE));
656      }
657
658      FixedArray::cast(stack_trace->elements())->set(frames_seen, *stack_frame);
659      frames_seen++;
660    }
661    it.Advance();
662  }
663
664  stack_trace->set_length(Smi::FromInt(frames_seen));
665  return stack_trace;
666}
667
668
669void Isolate::PrintStack() {
670  if (stack_trace_nesting_level_ == 0) {
671    stack_trace_nesting_level_++;
672
673    StringAllocator* allocator;
674    if (preallocated_message_space_ == NULL) {
675      allocator = new HeapStringAllocator();
676    } else {
677      allocator = preallocated_message_space_;
678    }
679
680    StringStream::ClearMentionedObjectCache();
681    StringStream accumulator(allocator);
682    incomplete_message_ = &accumulator;
683    PrintStack(&accumulator);
684    accumulator.OutputToStdOut();
685    InitializeLoggingAndCounters();
686    accumulator.Log();
687    incomplete_message_ = NULL;
688    stack_trace_nesting_level_ = 0;
689    if (preallocated_message_space_ == NULL) {
690      // Remove the HeapStringAllocator created above.
691      delete allocator;
692    }
693  } else if (stack_trace_nesting_level_ == 1) {
694    stack_trace_nesting_level_++;
695    OS::PrintError(
696      "\n\nAttempt to print stack while printing stack (double fault)\n");
697    OS::PrintError(
698      "If you are lucky you may find a partial stack dump on stdout.\n\n");
699    incomplete_message_->OutputToStdOut();
700  }
701}
702
703
704static void PrintFrames(StringStream* accumulator,
705                        StackFrame::PrintMode mode) {
706  StackFrameIterator it;
707  for (int i = 0; !it.done(); it.Advance()) {
708    it.frame()->Print(accumulator, mode, i++);
709  }
710}
711
712
713void Isolate::PrintStack(StringStream* accumulator) {
714  if (!IsInitialized()) {
715    accumulator->Add(
716        "\n==== Stack trace is not available ==========================\n\n");
717    accumulator->Add(
718        "\n==== Isolate for the thread is not initialized =============\n\n");
719    return;
720  }
721  // The MentionedObjectCache is not GC-proof at the moment.
722  AssertNoAllocation nogc;
723  ASSERT(StringStream::IsMentionedObjectCacheClear());
724
725  // Avoid printing anything if there are no frames.
726  if (c_entry_fp(thread_local_top()) == 0) return;
727
728  accumulator->Add(
729      "\n==== Stack trace ============================================\n\n");
730  PrintFrames(accumulator, StackFrame::OVERVIEW);
731
732  accumulator->Add(
733      "\n==== Details ================================================\n\n");
734  PrintFrames(accumulator, StackFrame::DETAILS);
735
736  accumulator->PrintMentionedObjectCache();
737  accumulator->Add("=====================\n\n");
738}
739
740
741void Isolate::SetFailedAccessCheckCallback(
742    v8::FailedAccessCheckCallback callback) {
743  thread_local_top()->failed_access_check_callback_ = callback;
744}
745
746
747void Isolate::ReportFailedAccessCheck(JSObject* receiver, v8::AccessType type) {
748  if (!thread_local_top()->failed_access_check_callback_) return;
749
750  ASSERT(receiver->IsAccessCheckNeeded());
751  ASSERT(context());
752
753  // Get the data object from access check info.
754  JSFunction* constructor = JSFunction::cast(receiver->map()->constructor());
755  if (!constructor->shared()->IsApiFunction()) return;
756  Object* data_obj =
757      constructor->shared()->get_api_func_data()->access_check_info();
758  if (data_obj == heap_.undefined_value()) return;
759
760  HandleScope scope;
761  Handle<JSObject> receiver_handle(receiver);
762  Handle<Object> data(AccessCheckInfo::cast(data_obj)->data());
763  { VMState state(this, EXTERNAL);
764    thread_local_top()->failed_access_check_callback_(
765      v8::Utils::ToLocal(receiver_handle),
766      type,
767      v8::Utils::ToLocal(data));
768  }
769}
770
771
772enum MayAccessDecision {
773  YES, NO, UNKNOWN
774};
775
776
777static MayAccessDecision MayAccessPreCheck(Isolate* isolate,
778                                           JSObject* receiver,
779                                           v8::AccessType type) {
780  // During bootstrapping, callback functions are not enabled yet.
781  if (isolate->bootstrapper()->IsActive()) return YES;
782
783  if (receiver->IsJSGlobalProxy()) {
784    Object* receiver_context = JSGlobalProxy::cast(receiver)->context();
785    if (!receiver_context->IsContext()) return NO;
786
787    // Get the global context of current top context.
788    // avoid using Isolate::global_context() because it uses Handle.
789    Context* global_context = isolate->context()->global()->global_context();
790    if (receiver_context == global_context) return YES;
791
792    if (Context::cast(receiver_context)->security_token() ==
793        global_context->security_token())
794      return YES;
795  }
796
797  return UNKNOWN;
798}
799
800
801bool Isolate::MayNamedAccess(JSObject* receiver, Object* key,
802                             v8::AccessType type) {
803  ASSERT(receiver->IsAccessCheckNeeded());
804
805  // The callers of this method are not expecting a GC.
806  AssertNoAllocation no_gc;
807
808  // Skip checks for hidden properties access.  Note, we do not
809  // require existence of a context in this case.
810  if (key == heap_.hidden_symbol()) return true;
811
812  // Check for compatibility between the security tokens in the
813  // current lexical context and the accessed object.
814  ASSERT(context());
815
816  MayAccessDecision decision = MayAccessPreCheck(this, receiver, type);
817  if (decision != UNKNOWN) return decision == YES;
818
819  // Get named access check callback
820  JSFunction* constructor = JSFunction::cast(receiver->map()->constructor());
821  if (!constructor->shared()->IsApiFunction()) return false;
822
823  Object* data_obj =
824     constructor->shared()->get_api_func_data()->access_check_info();
825  if (data_obj == heap_.undefined_value()) return false;
826
827  Object* fun_obj = AccessCheckInfo::cast(data_obj)->named_callback();
828  v8::NamedSecurityCallback callback =
829      v8::ToCData<v8::NamedSecurityCallback>(fun_obj);
830
831  if (!callback) return false;
832
833  HandleScope scope(this);
834  Handle<JSObject> receiver_handle(receiver, this);
835  Handle<Object> key_handle(key, this);
836  Handle<Object> data(AccessCheckInfo::cast(data_obj)->data(), this);
837  LOG(this, ApiNamedSecurityCheck(key));
838  bool result = false;
839  {
840    // Leaving JavaScript.
841    VMState state(this, EXTERNAL);
842    result = callback(v8::Utils::ToLocal(receiver_handle),
843                      v8::Utils::ToLocal(key_handle),
844                      type,
845                      v8::Utils::ToLocal(data));
846  }
847  return result;
848}
849
850
851bool Isolate::MayIndexedAccess(JSObject* receiver,
852                               uint32_t index,
853                               v8::AccessType type) {
854  ASSERT(receiver->IsAccessCheckNeeded());
855  // Check for compatibility between the security tokens in the
856  // current lexical context and the accessed object.
857  ASSERT(context());
858
859  MayAccessDecision decision = MayAccessPreCheck(this, receiver, type);
860  if (decision != UNKNOWN) return decision == YES;
861
862  // Get indexed access check callback
863  JSFunction* constructor = JSFunction::cast(receiver->map()->constructor());
864  if (!constructor->shared()->IsApiFunction()) return false;
865
866  Object* data_obj =
867      constructor->shared()->get_api_func_data()->access_check_info();
868  if (data_obj == heap_.undefined_value()) return false;
869
870  Object* fun_obj = AccessCheckInfo::cast(data_obj)->indexed_callback();
871  v8::IndexedSecurityCallback callback =
872      v8::ToCData<v8::IndexedSecurityCallback>(fun_obj);
873
874  if (!callback) return false;
875
876  HandleScope scope(this);
877  Handle<JSObject> receiver_handle(receiver, this);
878  Handle<Object> data(AccessCheckInfo::cast(data_obj)->data(), this);
879  LOG(this, ApiIndexedSecurityCheck(index));
880  bool result = false;
881  {
882    // Leaving JavaScript.
883    VMState state(this, EXTERNAL);
884    result = callback(v8::Utils::ToLocal(receiver_handle),
885                      index,
886                      type,
887                      v8::Utils::ToLocal(data));
888  }
889  return result;
890}
891
892
893const char* const Isolate::kStackOverflowMessage =
894  "Uncaught RangeError: Maximum call stack size exceeded";
895
896
897Failure* Isolate::StackOverflow() {
898  HandleScope scope;
899  Handle<String> key = factory()->stack_overflow_symbol();
900  Handle<JSObject> boilerplate =
901      Handle<JSObject>::cast(GetProperty(js_builtins_object(), key));
902  Handle<Object> exception = Copy(boilerplate);
903  // TODO(1240995): To avoid having to call JavaScript code to compute
904  // the message for stack overflow exceptions which is very likely to
905  // double fault with another stack overflow exception, we use a
906  // precomputed message.
907  DoThrow(*exception, NULL);
908  return Failure::Exception();
909}
910
911
912Failure* Isolate::TerminateExecution() {
913  DoThrow(heap_.termination_exception(), NULL);
914  return Failure::Exception();
915}
916
917
918Failure* Isolate::Throw(Object* exception, MessageLocation* location) {
919  DoThrow(exception, location);
920  return Failure::Exception();
921}
922
923
924Failure* Isolate::ReThrow(MaybeObject* exception, MessageLocation* location) {
925  bool can_be_caught_externally = false;
926  bool catchable_by_javascript = is_catchable_by_javascript(exception);
927  ShouldReportException(&can_be_caught_externally, catchable_by_javascript);
928
929  thread_local_top()->catcher_ = can_be_caught_externally ?
930      try_catch_handler() : NULL;
931
932  // Set the exception being re-thrown.
933  set_pending_exception(exception);
934  if (exception->IsFailure()) return exception->ToFailureUnchecked();
935  return Failure::Exception();
936}
937
938
939Failure* Isolate::ThrowIllegalOperation() {
940  return Throw(heap_.illegal_access_symbol());
941}
942
943
944void Isolate::ScheduleThrow(Object* exception) {
945  // When scheduling a throw we first throw the exception to get the
946  // error reporting if it is uncaught before rescheduling it.
947  Throw(exception);
948  thread_local_top()->scheduled_exception_ = pending_exception();
949  thread_local_top()->external_caught_exception_ = false;
950  clear_pending_exception();
951}
952
953
954Failure* Isolate::PromoteScheduledException() {
955  MaybeObject* thrown = scheduled_exception();
956  clear_scheduled_exception();
957  // Re-throw the exception to avoid getting repeated error reporting.
958  return ReThrow(thrown);
959}
960
961
962void Isolate::PrintCurrentStackTrace(FILE* out) {
963  StackTraceFrameIterator it(this);
964  while (!it.done()) {
965    HandleScope scope;
966    // Find code position if recorded in relocation info.
967    JavaScriptFrame* frame = it.frame();
968    int pos = frame->LookupCode()->SourcePosition(frame->pc());
969    Handle<Object> pos_obj(Smi::FromInt(pos));
970    // Fetch function and receiver.
971    Handle<JSFunction> fun(JSFunction::cast(frame->function()));
972    Handle<Object> recv(frame->receiver());
973    // Advance to the next JavaScript frame and determine if the
974    // current frame is the top-level frame.
975    it.Advance();
976    Handle<Object> is_top_level = it.done()
977        ? factory()->true_value()
978        : factory()->false_value();
979    // Generate and print stack trace line.
980    Handle<String> line =
981        Execution::GetStackTraceLine(recv, fun, pos_obj, is_top_level);
982    if (line->length() > 0) {
983      line->PrintOn(out);
984      fprintf(out, "\n");
985    }
986  }
987}
988
989
990void Isolate::ComputeLocation(MessageLocation* target) {
991  *target = MessageLocation(Handle<Script>(heap_.empty_script()), -1, -1);
992  StackTraceFrameIterator it(this);
993  if (!it.done()) {
994    JavaScriptFrame* frame = it.frame();
995    JSFunction* fun = JSFunction::cast(frame->function());
996    Object* script = fun->shared()->script();
997    if (script->IsScript() &&
998        !(Script::cast(script)->source()->IsUndefined())) {
999      int pos = frame->LookupCode()->SourcePosition(frame->pc());
1000      // Compute the location from the function and the reloc info.
1001      Handle<Script> casted_script(Script::cast(script));
1002      *target = MessageLocation(casted_script, pos, pos + 1);
1003    }
1004  }
1005}
1006
1007
1008bool Isolate::ShouldReportException(bool* can_be_caught_externally,
1009                                    bool catchable_by_javascript) {
1010  // Find the top-most try-catch handler.
1011  StackHandler* handler =
1012      StackHandler::FromAddress(Isolate::handler(thread_local_top()));
1013  while (handler != NULL && !handler->is_catch()) {
1014    handler = handler->next();
1015  }
1016
1017  // Get the address of the external handler so we can compare the address to
1018  // determine which one is closer to the top of the stack.
1019  Address external_handler_address =
1020      thread_local_top()->try_catch_handler_address();
1021
1022  // The exception has been externally caught if and only if there is
1023  // an external handler which is on top of the top-most try-catch
1024  // handler.
1025  *can_be_caught_externally = external_handler_address != NULL &&
1026      (handler == NULL || handler->address() > external_handler_address ||
1027       !catchable_by_javascript);
1028
1029  if (*can_be_caught_externally) {
1030    // Only report the exception if the external handler is verbose.
1031    return try_catch_handler()->is_verbose_;
1032  } else {
1033    // Report the exception if it isn't caught by JavaScript code.
1034    return handler == NULL;
1035  }
1036}
1037
1038
1039bool Isolate::IsErrorObject(Handle<Object> obj) {
1040  if (!obj->IsJSObject()) return false;
1041
1042  String* error_key = *(factory()->LookupAsciiSymbol("$Error"));
1043  Object* error_constructor =
1044      js_builtins_object()->GetPropertyNoExceptionThrown(error_key);
1045
1046  for (Object* prototype = *obj; !prototype->IsNull();
1047       prototype = prototype->GetPrototype()) {
1048    if (!prototype->IsJSObject()) return false;
1049    if (JSObject::cast(prototype)->map()->constructor() == error_constructor) {
1050      return true;
1051    }
1052  }
1053  return false;
1054}
1055
1056
1057void Isolate::DoThrow(Object* exception, MessageLocation* location) {
1058  ASSERT(!has_pending_exception());
1059
1060  HandleScope scope;
1061  Handle<Object> exception_handle(exception);
1062
1063  // Determine reporting and whether the exception is caught externally.
1064  bool catchable_by_javascript = is_catchable_by_javascript(exception);
1065  bool can_be_caught_externally = false;
1066  bool should_report_exception =
1067      ShouldReportException(&can_be_caught_externally, catchable_by_javascript);
1068  bool report_exception = catchable_by_javascript && should_report_exception;
1069  bool try_catch_needs_message =
1070      can_be_caught_externally && try_catch_handler()->capture_message_;
1071  bool bootstrapping = bootstrapper()->IsActive();
1072
1073#ifdef ENABLE_DEBUGGER_SUPPORT
1074  // Notify debugger of exception.
1075  if (catchable_by_javascript) {
1076    debugger_->OnException(exception_handle, report_exception);
1077  }
1078#endif
1079
1080  // Generate the message if required.
1081  if (report_exception || try_catch_needs_message) {
1082    MessageLocation potential_computed_location;
1083    if (location == NULL) {
1084      // If no location was specified we use a computed one instead.
1085      ComputeLocation(&potential_computed_location);
1086      location = &potential_computed_location;
1087    }
1088    // It's not safe to try to make message objects or collect stack traces
1089    // while the bootstrapper is active since the infrastructure may not have
1090    // been properly initialized.
1091    if (!bootstrapping) {
1092      Handle<String> stack_trace;
1093      if (FLAG_trace_exception) stack_trace = StackTraceString();
1094      Handle<JSArray> stack_trace_object;
1095      if (capture_stack_trace_for_uncaught_exceptions_) {
1096        if (IsErrorObject(exception_handle)) {
1097          // We fetch the stack trace that corresponds to this error object.
1098          String* key = heap()->hidden_stack_trace_symbol();
1099          Object* stack_property =
1100              JSObject::cast(*exception_handle)->GetHiddenProperty(key);
1101          // Property lookup may have failed.  In this case it's probably not
1102          // a valid Error object.
1103          if (stack_property->IsJSArray()) {
1104            stack_trace_object = Handle<JSArray>(JSArray::cast(stack_property));
1105          }
1106        }
1107        if (stack_trace_object.is_null()) {
1108          // Not an error object, we capture at throw site.
1109          stack_trace_object = CaptureCurrentStackTrace(
1110              stack_trace_for_uncaught_exceptions_frame_limit_,
1111              stack_trace_for_uncaught_exceptions_options_);
1112        }
1113      }
1114      Handle<Object> message_obj = MessageHandler::MakeMessageObject(
1115          "uncaught_exception",
1116          location,
1117          HandleVector<Object>(&exception_handle, 1),
1118          stack_trace,
1119          stack_trace_object);
1120      thread_local_top()->pending_message_obj_ = *message_obj;
1121      if (location != NULL) {
1122        thread_local_top()->pending_message_script_ = *location->script();
1123        thread_local_top()->pending_message_start_pos_ = location->start_pos();
1124        thread_local_top()->pending_message_end_pos_ = location->end_pos();
1125      }
1126    } else if (location != NULL && !location->script().is_null()) {
1127      // We are bootstrapping and caught an error where the location is set
1128      // and we have a script for the location.
1129      // In this case we could have an extension (or an internal error
1130      // somewhere) and we print out the line number at which the error occured
1131      // to the console for easier debugging.
1132      int line_number = GetScriptLineNumberSafe(location->script(),
1133                                                location->start_pos());
1134      OS::PrintError("Extension or internal compilation error at line %d.\n",
1135                     line_number);
1136    }
1137  }
1138
1139  // Save the message for reporting if the the exception remains uncaught.
1140  thread_local_top()->has_pending_message_ = report_exception;
1141
1142  // Do not forget to clean catcher_ if currently thrown exception cannot
1143  // be caught.  If necessary, ReThrow will update the catcher.
1144  thread_local_top()->catcher_ = can_be_caught_externally ?
1145      try_catch_handler() : NULL;
1146
1147  set_pending_exception(*exception_handle);
1148}
1149
1150
1151bool Isolate::IsExternallyCaught() {
1152  ASSERT(has_pending_exception());
1153
1154  if ((thread_local_top()->catcher_ == NULL) ||
1155      (try_catch_handler() != thread_local_top()->catcher_)) {
1156    // When throwing the exception, we found no v8::TryCatch
1157    // which should care about this exception.
1158    return false;
1159  }
1160
1161  if (!is_catchable_by_javascript(pending_exception())) {
1162    return true;
1163  }
1164
1165  // Get the address of the external handler so we can compare the address to
1166  // determine which one is closer to the top of the stack.
1167  Address external_handler_address =
1168      thread_local_top()->try_catch_handler_address();
1169  ASSERT(external_handler_address != NULL);
1170
1171  // The exception has been externally caught if and only if there is
1172  // an external handler which is on top of the top-most try-finally
1173  // handler.
1174  // There should be no try-catch blocks as they would prohibit us from
1175  // finding external catcher in the first place (see catcher_ check above).
1176  //
1177  // Note, that finally clause would rethrow an exception unless it's
1178  // aborted by jumps in control flow like return, break, etc. and we'll
1179  // have another chances to set proper v8::TryCatch.
1180  StackHandler* handler =
1181      StackHandler::FromAddress(Isolate::handler(thread_local_top()));
1182  while (handler != NULL && handler->address() < external_handler_address) {
1183    ASSERT(!handler->is_catch());
1184    if (handler->is_finally()) return false;
1185
1186    handler = handler->next();
1187  }
1188
1189  return true;
1190}
1191
1192
1193void Isolate::ReportPendingMessages() {
1194  ASSERT(has_pending_exception());
1195  PropagatePendingExceptionToExternalTryCatch();
1196
1197  // If the pending exception is OutOfMemoryException set out_of_memory in
1198  // the global context.  Note: We have to mark the global context here
1199  // since the GenerateThrowOutOfMemory stub cannot make a RuntimeCall to
1200  // set it.
1201  HandleScope scope;
1202  if (thread_local_top_.pending_exception_ == Failure::OutOfMemoryException()) {
1203    context()->mark_out_of_memory();
1204  } else if (thread_local_top_.pending_exception_ ==
1205             heap()->termination_exception()) {
1206    // Do nothing: if needed, the exception has been already propagated to
1207    // v8::TryCatch.
1208  } else {
1209    if (thread_local_top_.has_pending_message_) {
1210      thread_local_top_.has_pending_message_ = false;
1211      if (!thread_local_top_.pending_message_obj_->IsTheHole()) {
1212        HandleScope scope;
1213        Handle<Object> message_obj(thread_local_top_.pending_message_obj_);
1214        if (thread_local_top_.pending_message_script_ != NULL) {
1215          Handle<Script> script(thread_local_top_.pending_message_script_);
1216          int start_pos = thread_local_top_.pending_message_start_pos_;
1217          int end_pos = thread_local_top_.pending_message_end_pos_;
1218          MessageLocation location(script, start_pos, end_pos);
1219          MessageHandler::ReportMessage(this, &location, message_obj);
1220        } else {
1221          MessageHandler::ReportMessage(this, NULL, message_obj);
1222        }
1223      }
1224    }
1225  }
1226  clear_pending_message();
1227}
1228
1229
1230void Isolate::TraceException(bool flag) {
1231  FLAG_trace_exception = flag;  // TODO(isolates): This is an unfortunate use.
1232}
1233
1234
1235bool Isolate::OptionalRescheduleException(bool is_bottom_call) {
1236  ASSERT(has_pending_exception());
1237  PropagatePendingExceptionToExternalTryCatch();
1238
1239  // Always reschedule out of memory exceptions.
1240  if (!is_out_of_memory()) {
1241    bool is_termination_exception =
1242        pending_exception() == heap_.termination_exception();
1243
1244    // Do not reschedule the exception if this is the bottom call.
1245    bool clear_exception = is_bottom_call;
1246
1247    if (is_termination_exception) {
1248      if (is_bottom_call) {
1249        thread_local_top()->external_caught_exception_ = false;
1250        clear_pending_exception();
1251        return false;
1252      }
1253    } else if (thread_local_top()->external_caught_exception_) {
1254      // If the exception is externally caught, clear it if there are no
1255      // JavaScript frames on the way to the C++ frame that has the
1256      // external handler.
1257      ASSERT(thread_local_top()->try_catch_handler_address() != NULL);
1258      Address external_handler_address =
1259          thread_local_top()->try_catch_handler_address();
1260      JavaScriptFrameIterator it;
1261      if (it.done() || (it.frame()->sp() > external_handler_address)) {
1262        clear_exception = true;
1263      }
1264    }
1265
1266    // Clear the exception if needed.
1267    if (clear_exception) {
1268      thread_local_top()->external_caught_exception_ = false;
1269      clear_pending_exception();
1270      return false;
1271    }
1272  }
1273
1274  // Reschedule the exception.
1275  thread_local_top()->scheduled_exception_ = pending_exception();
1276  clear_pending_exception();
1277  return true;
1278}
1279
1280
1281void Isolate::SetCaptureStackTraceForUncaughtExceptions(
1282      bool capture,
1283      int frame_limit,
1284      StackTrace::StackTraceOptions options) {
1285  capture_stack_trace_for_uncaught_exceptions_ = capture;
1286  stack_trace_for_uncaught_exceptions_frame_limit_ = frame_limit;
1287  stack_trace_for_uncaught_exceptions_options_ = options;
1288}
1289
1290
1291bool Isolate::is_out_of_memory() {
1292  if (has_pending_exception()) {
1293    MaybeObject* e = pending_exception();
1294    if (e->IsFailure() && Failure::cast(e)->IsOutOfMemoryException()) {
1295      return true;
1296    }
1297  }
1298  if (has_scheduled_exception()) {
1299    MaybeObject* e = scheduled_exception();
1300    if (e->IsFailure() && Failure::cast(e)->IsOutOfMemoryException()) {
1301      return true;
1302    }
1303  }
1304  return false;
1305}
1306
1307
1308Handle<Context> Isolate::global_context() {
1309  GlobalObject* global = thread_local_top()->context_->global();
1310  return Handle<Context>(global->global_context());
1311}
1312
1313
1314Handle<Context> Isolate::GetCallingGlobalContext() {
1315  JavaScriptFrameIterator it;
1316#ifdef ENABLE_DEBUGGER_SUPPORT
1317  if (debug_->InDebugger()) {
1318    while (!it.done()) {
1319      JavaScriptFrame* frame = it.frame();
1320      Context* context = Context::cast(frame->context());
1321      if (context->global_context() == *debug_->debug_context()) {
1322        it.Advance();
1323      } else {
1324        break;
1325      }
1326    }
1327  }
1328#endif  // ENABLE_DEBUGGER_SUPPORT
1329  if (it.done()) return Handle<Context>::null();
1330  JavaScriptFrame* frame = it.frame();
1331  Context* context = Context::cast(frame->context());
1332  return Handle<Context>(context->global_context());
1333}
1334
1335
1336char* Isolate::ArchiveThread(char* to) {
1337  if (RuntimeProfiler::IsEnabled() && current_vm_state() == JS) {
1338    RuntimeProfiler::IsolateExitedJS(this);
1339  }
1340  memcpy(to, reinterpret_cast<char*>(thread_local_top()),
1341         sizeof(ThreadLocalTop));
1342  InitializeThreadLocal();
1343  clear_pending_exception();
1344  clear_pending_message();
1345  clear_scheduled_exception();
1346  return to + sizeof(ThreadLocalTop);
1347}
1348
1349
1350char* Isolate::RestoreThread(char* from) {
1351  memcpy(reinterpret_cast<char*>(thread_local_top()), from,
1352         sizeof(ThreadLocalTop));
1353  // This might be just paranoia, but it seems to be needed in case a
1354  // thread_local_top_ is restored on a separate OS thread.
1355#ifdef USE_SIMULATOR
1356#ifdef V8_TARGET_ARCH_ARM
1357  thread_local_top()->simulator_ = Simulator::current(this);
1358#elif V8_TARGET_ARCH_MIPS
1359  thread_local_top()->simulator_ = Simulator::current(this);
1360#endif
1361#endif
1362  if (RuntimeProfiler::IsEnabled() && current_vm_state() == JS) {
1363    RuntimeProfiler::IsolateEnteredJS(this);
1364  }
1365  ASSERT(context() == NULL || context()->IsContext());
1366  return from + sizeof(ThreadLocalTop);
1367}
1368
1369
1370Isolate::ThreadDataTable::ThreadDataTable()
1371    : list_(NULL) {
1372}
1373
1374
1375Isolate::PerIsolateThreadData*
1376    Isolate::ThreadDataTable::Lookup(Isolate* isolate,
1377                                     ThreadId thread_id) {
1378  for (PerIsolateThreadData* data = list_; data != NULL; data = data->next_) {
1379    if (data->Matches(isolate, thread_id)) return data;
1380  }
1381  return NULL;
1382}
1383
1384
1385void Isolate::ThreadDataTable::Insert(Isolate::PerIsolateThreadData* data) {
1386  if (list_ != NULL) list_->prev_ = data;
1387  data->next_ = list_;
1388  list_ = data;
1389}
1390
1391
1392void Isolate::ThreadDataTable::Remove(PerIsolateThreadData* data) {
1393  if (list_ == data) list_ = data->next_;
1394  if (data->next_ != NULL) data->next_->prev_ = data->prev_;
1395  if (data->prev_ != NULL) data->prev_->next_ = data->next_;
1396  delete data;
1397}
1398
1399
1400void Isolate::ThreadDataTable::Remove(Isolate* isolate,
1401                                      ThreadId thread_id) {
1402  PerIsolateThreadData* data = Lookup(isolate, thread_id);
1403  if (data != NULL) {
1404    Remove(data);
1405  }
1406}
1407
1408
1409void Isolate::ThreadDataTable::RemoveAllThreads(Isolate* isolate) {
1410  PerIsolateThreadData* data = list_;
1411  while (data != NULL) {
1412    PerIsolateThreadData* next = data->next_;
1413    if (data->isolate() == isolate) Remove(data);
1414    data = next;
1415  }
1416}
1417
1418
1419#ifdef DEBUG
1420#define TRACE_ISOLATE(tag)                                              \
1421  do {                                                                  \
1422    if (FLAG_trace_isolates) {                                          \
1423      PrintF("Isolate %p " #tag "\n", reinterpret_cast<void*>(this));   \
1424    }                                                                   \
1425  } while (false)
1426#else
1427#define TRACE_ISOLATE(tag)
1428#endif
1429
1430
1431Isolate::Isolate()
1432    : state_(UNINITIALIZED),
1433      entry_stack_(NULL),
1434      stack_trace_nesting_level_(0),
1435      incomplete_message_(NULL),
1436      preallocated_memory_thread_(NULL),
1437      preallocated_message_space_(NULL),
1438      bootstrapper_(NULL),
1439      runtime_profiler_(NULL),
1440      compilation_cache_(NULL),
1441      counters_(NULL),
1442      code_range_(NULL),
1443      // Must be initialized early to allow v8::SetResourceConstraints calls.
1444      break_access_(OS::CreateMutex()),
1445      debugger_initialized_(false),
1446      // Must be initialized early to allow v8::Debug calls.
1447      debugger_access_(OS::CreateMutex()),
1448      logger_(NULL),
1449      stats_table_(NULL),
1450      stub_cache_(NULL),
1451      deoptimizer_data_(NULL),
1452      capture_stack_trace_for_uncaught_exceptions_(false),
1453      stack_trace_for_uncaught_exceptions_frame_limit_(0),
1454      stack_trace_for_uncaught_exceptions_options_(StackTrace::kOverview),
1455      transcendental_cache_(NULL),
1456      memory_allocator_(NULL),
1457      keyed_lookup_cache_(NULL),
1458      context_slot_cache_(NULL),
1459      descriptor_lookup_cache_(NULL),
1460      handle_scope_implementer_(NULL),
1461      unicode_cache_(NULL),
1462      in_use_list_(0),
1463      free_list_(0),
1464      preallocated_storage_preallocated_(false),
1465      inner_pointer_to_code_cache_(NULL),
1466      write_input_buffer_(NULL),
1467      global_handles_(NULL),
1468      context_switcher_(NULL),
1469      thread_manager_(NULL),
1470      fp_stubs_generated_(false),
1471      has_installed_extensions_(false),
1472      string_tracker_(NULL),
1473      regexp_stack_(NULL),
1474      date_cache_(NULL),
1475      embedder_data_(NULL),
1476      context_exit_happened_(false) {
1477  TRACE_ISOLATE(constructor);
1478
1479  memset(isolate_addresses_, 0,
1480      sizeof(isolate_addresses_[0]) * (kIsolateAddressCount + 1));
1481
1482  heap_.isolate_ = this;
1483  zone_.isolate_ = this;
1484  stack_guard_.isolate_ = this;
1485
1486  // ThreadManager is initialized early to support locking an isolate
1487  // before it is entered.
1488  thread_manager_ = new ThreadManager();
1489  thread_manager_->isolate_ = this;
1490
1491#if defined(V8_TARGET_ARCH_ARM) && !defined(__arm__) || \
1492    defined(V8_TARGET_ARCH_MIPS) && !defined(__mips__)
1493  simulator_initialized_ = false;
1494  simulator_i_cache_ = NULL;
1495  simulator_redirection_ = NULL;
1496#endif
1497
1498#ifdef DEBUG
1499  // heap_histograms_ initializes itself.
1500  memset(&js_spill_information_, 0, sizeof(js_spill_information_));
1501  memset(code_kind_statistics_, 0,
1502         sizeof(code_kind_statistics_[0]) * Code::NUMBER_OF_KINDS);
1503#endif
1504
1505#ifdef ENABLE_DEBUGGER_SUPPORT
1506  debug_ = NULL;
1507  debugger_ = NULL;
1508#endif
1509
1510  handle_scope_data_.Initialize();
1511
1512#define ISOLATE_INIT_EXECUTE(type, name, initial_value)                        \
1513  name##_ = (initial_value);
1514  ISOLATE_INIT_LIST(ISOLATE_INIT_EXECUTE)
1515#undef ISOLATE_INIT_EXECUTE
1516
1517#define ISOLATE_INIT_ARRAY_EXECUTE(type, name, length)                         \
1518  memset(name##_, 0, sizeof(type) * length);
1519  ISOLATE_INIT_ARRAY_LIST(ISOLATE_INIT_ARRAY_EXECUTE)
1520#undef ISOLATE_INIT_ARRAY_EXECUTE
1521}
1522
1523void Isolate::TearDown() {
1524  TRACE_ISOLATE(tear_down);
1525
1526  // Temporarily set this isolate as current so that various parts of
1527  // the isolate can access it in their destructors without having a
1528  // direct pointer. We don't use Enter/Exit here to avoid
1529  // initializing the thread data.
1530  PerIsolateThreadData* saved_data = CurrentPerIsolateThreadData();
1531  Isolate* saved_isolate = UncheckedCurrent();
1532  SetIsolateThreadLocals(this, NULL);
1533
1534  Deinit();
1535
1536  { ScopedLock lock(process_wide_mutex_);
1537    thread_data_table_->RemoveAllThreads(this);
1538  }
1539
1540  if (!IsDefaultIsolate()) {
1541    delete this;
1542  }
1543
1544  // Restore the previous current isolate.
1545  SetIsolateThreadLocals(saved_isolate, saved_data);
1546}
1547
1548
1549void Isolate::Deinit() {
1550  if (state_ == INITIALIZED) {
1551    TRACE_ISOLATE(deinit);
1552
1553    if (FLAG_hydrogen_stats) HStatistics::Instance()->Print();
1554
1555    // We must stop the logger before we tear down other components.
1556    logger_->EnsureTickerStopped();
1557
1558    delete deoptimizer_data_;
1559    deoptimizer_data_ = NULL;
1560    if (FLAG_preemption) {
1561      v8::Locker locker;
1562      v8::Locker::StopPreemption();
1563    }
1564    builtins_.TearDown();
1565    bootstrapper_->TearDown();
1566
1567    // Remove the external reference to the preallocated stack memory.
1568    delete preallocated_message_space_;
1569    preallocated_message_space_ = NULL;
1570    PreallocatedMemoryThreadStop();
1571
1572    HeapProfiler::TearDown();
1573    CpuProfiler::TearDown();
1574    if (runtime_profiler_ != NULL) {
1575      runtime_profiler_->TearDown();
1576      delete runtime_profiler_;
1577      runtime_profiler_ = NULL;
1578    }
1579    heap_.TearDown();
1580    logger_->TearDown();
1581
1582    // The default isolate is re-initializable due to legacy API.
1583    state_ = UNINITIALIZED;
1584  }
1585}
1586
1587
1588void Isolate::SetIsolateThreadLocals(Isolate* isolate,
1589                                     PerIsolateThreadData* data) {
1590  Thread::SetThreadLocal(isolate_key_, isolate);
1591  Thread::SetThreadLocal(per_isolate_thread_data_key_, data);
1592}
1593
1594
1595Isolate::~Isolate() {
1596  TRACE_ISOLATE(destructor);
1597
1598  // Has to be called while counters_ are still alive.
1599  zone_.DeleteKeptSegment();
1600
1601  delete[] assembler_spare_buffer_;
1602  assembler_spare_buffer_ = NULL;
1603
1604  delete unicode_cache_;
1605  unicode_cache_ = NULL;
1606
1607  delete date_cache_;
1608  date_cache_ = NULL;
1609
1610  delete regexp_stack_;
1611  regexp_stack_ = NULL;
1612
1613  delete descriptor_lookup_cache_;
1614  descriptor_lookup_cache_ = NULL;
1615  delete context_slot_cache_;
1616  context_slot_cache_ = NULL;
1617  delete keyed_lookup_cache_;
1618  keyed_lookup_cache_ = NULL;
1619
1620  delete transcendental_cache_;
1621  transcendental_cache_ = NULL;
1622  delete stub_cache_;
1623  stub_cache_ = NULL;
1624  delete stats_table_;
1625  stats_table_ = NULL;
1626
1627  delete logger_;
1628  logger_ = NULL;
1629
1630  delete counters_;
1631  counters_ = NULL;
1632
1633  delete handle_scope_implementer_;
1634  handle_scope_implementer_ = NULL;
1635  delete break_access_;
1636  break_access_ = NULL;
1637  delete debugger_access_;
1638  debugger_access_ = NULL;
1639
1640  delete compilation_cache_;
1641  compilation_cache_ = NULL;
1642  delete bootstrapper_;
1643  bootstrapper_ = NULL;
1644  delete inner_pointer_to_code_cache_;
1645  inner_pointer_to_code_cache_ = NULL;
1646  delete write_input_buffer_;
1647  write_input_buffer_ = NULL;
1648
1649  delete context_switcher_;
1650  context_switcher_ = NULL;
1651  delete thread_manager_;
1652  thread_manager_ = NULL;
1653
1654  delete string_tracker_;
1655  string_tracker_ = NULL;
1656
1657  delete memory_allocator_;
1658  memory_allocator_ = NULL;
1659  delete code_range_;
1660  code_range_ = NULL;
1661  delete global_handles_;
1662  global_handles_ = NULL;
1663
1664  delete external_reference_table_;
1665  external_reference_table_ = NULL;
1666
1667#ifdef ENABLE_DEBUGGER_SUPPORT
1668  delete debugger_;
1669  debugger_ = NULL;
1670  delete debug_;
1671  debug_ = NULL;
1672#endif
1673}
1674
1675
1676void Isolate::InitializeThreadLocal() {
1677  thread_local_top_.isolate_ = this;
1678  thread_local_top_.Initialize();
1679}
1680
1681
1682void Isolate::PropagatePendingExceptionToExternalTryCatch() {
1683  ASSERT(has_pending_exception());
1684
1685  bool external_caught = IsExternallyCaught();
1686  thread_local_top_.external_caught_exception_ = external_caught;
1687
1688  if (!external_caught) return;
1689
1690  if (thread_local_top_.pending_exception_ == Failure::OutOfMemoryException()) {
1691    // Do not propagate OOM exception: we should kill VM asap.
1692  } else if (thread_local_top_.pending_exception_ ==
1693             heap()->termination_exception()) {
1694    try_catch_handler()->can_continue_ = false;
1695    try_catch_handler()->exception_ = heap()->null_value();
1696  } else {
1697    // At this point all non-object (failure) exceptions have
1698    // been dealt with so this shouldn't fail.
1699    ASSERT(!pending_exception()->IsFailure());
1700    try_catch_handler()->can_continue_ = true;
1701    try_catch_handler()->exception_ = pending_exception();
1702    if (!thread_local_top_.pending_message_obj_->IsTheHole()) {
1703      try_catch_handler()->message_ = thread_local_top_.pending_message_obj_;
1704    }
1705  }
1706}
1707
1708
1709void Isolate::InitializeLoggingAndCounters() {
1710  if (logger_ == NULL) {
1711    logger_ = new Logger;
1712  }
1713  if (counters_ == NULL) {
1714    counters_ = new Counters;
1715  }
1716}
1717
1718
1719void Isolate::InitializeDebugger() {
1720#ifdef ENABLE_DEBUGGER_SUPPORT
1721  ScopedLock lock(debugger_access_);
1722  if (NoBarrier_Load(&debugger_initialized_)) return;
1723  InitializeLoggingAndCounters();
1724  debug_ = new Debug(this);
1725  debugger_ = new Debugger(this);
1726  Release_Store(&debugger_initialized_, true);
1727#endif
1728}
1729
1730
1731bool Isolate::Init(Deserializer* des) {
1732  ASSERT(state_ != INITIALIZED);
1733  ASSERT(Isolate::Current() == this);
1734  TRACE_ISOLATE(init);
1735
1736#ifdef DEBUG
1737  // The initialization process does not handle memory exhaustion.
1738  DisallowAllocationFailure disallow_allocation_failure;
1739#endif
1740
1741  InitializeLoggingAndCounters();
1742
1743  InitializeDebugger();
1744
1745  memory_allocator_ = new MemoryAllocator(this);
1746  code_range_ = new CodeRange(this);
1747
1748  // Safe after setting Heap::isolate_, initializing StackGuard and
1749  // ensuring that Isolate::Current() == this.
1750  heap_.SetStackLimits();
1751
1752#define ASSIGN_ELEMENT(CamelName, hacker_name)                  \
1753  isolate_addresses_[Isolate::k##CamelName##Address] =          \
1754      reinterpret_cast<Address>(hacker_name##_address());
1755  FOR_EACH_ISOLATE_ADDRESS_NAME(ASSIGN_ELEMENT)
1756#undef C
1757
1758  string_tracker_ = new StringTracker();
1759  string_tracker_->isolate_ = this;
1760  compilation_cache_ = new CompilationCache(this);
1761  transcendental_cache_ = new TranscendentalCache();
1762  keyed_lookup_cache_ = new KeyedLookupCache();
1763  context_slot_cache_ = new ContextSlotCache();
1764  descriptor_lookup_cache_ = new DescriptorLookupCache();
1765  unicode_cache_ = new UnicodeCache();
1766  inner_pointer_to_code_cache_ = new InnerPointerToCodeCache(this);
1767  write_input_buffer_ = new StringInputBuffer();
1768  global_handles_ = new GlobalHandles(this);
1769  bootstrapper_ = new Bootstrapper();
1770  handle_scope_implementer_ = new HandleScopeImplementer(this);
1771  stub_cache_ = new StubCache(this);
1772  regexp_stack_ = new RegExpStack();
1773  regexp_stack_->isolate_ = this;
1774  date_cache_ = new DateCache();
1775
1776  // Enable logging before setting up the heap
1777  logger_->SetUp();
1778
1779  CpuProfiler::SetUp();
1780  HeapProfiler::SetUp();
1781
1782  // Initialize other runtime facilities
1783#if defined(USE_SIMULATOR)
1784#if defined(V8_TARGET_ARCH_ARM) || defined(V8_TARGET_ARCH_MIPS)
1785  Simulator::Initialize(this);
1786#endif
1787#endif
1788
1789  { // NOLINT
1790    // Ensure that the thread has a valid stack guard.  The v8::Locker object
1791    // will ensure this too, but we don't have to use lockers if we are only
1792    // using one thread.
1793    ExecutionAccess lock(this);
1794    stack_guard_.InitThread(lock);
1795  }
1796
1797  // SetUp the object heap.
1798  const bool create_heap_objects = (des == NULL);
1799  ASSERT(!heap_.HasBeenSetUp());
1800  if (!heap_.SetUp(create_heap_objects)) {
1801    V8::SetFatalError();
1802    return false;
1803  }
1804
1805  InitializeThreadLocal();
1806
1807  bootstrapper_->Initialize(create_heap_objects);
1808  builtins_.SetUp(create_heap_objects);
1809
1810  // Only preallocate on the first initialization.
1811  if (FLAG_preallocate_message_memory && preallocated_message_space_ == NULL) {
1812    // Start the thread which will set aside some memory.
1813    PreallocatedMemoryThreadStart();
1814    preallocated_message_space_ =
1815        new NoAllocationStringAllocator(
1816            preallocated_memory_thread_->data(),
1817            preallocated_memory_thread_->length());
1818    PreallocatedStorageInit(preallocated_memory_thread_->length() / 4);
1819  }
1820
1821  if (FLAG_preemption) {
1822    v8::Locker locker;
1823    v8::Locker::StartPreemption(100);
1824  }
1825
1826#ifdef ENABLE_DEBUGGER_SUPPORT
1827  debug_->SetUp(create_heap_objects);
1828#endif
1829
1830  // If we are deserializing, read the state into the now-empty heap.
1831  if (des != NULL) {
1832    des->Deserialize();
1833  }
1834  stub_cache_->Initialize();
1835
1836  // Finish initialization of ThreadLocal after deserialization is done.
1837  clear_pending_exception();
1838  clear_pending_message();
1839  clear_scheduled_exception();
1840
1841  // Deserializing may put strange things in the root array's copy of the
1842  // stack guard.
1843  heap_.SetStackLimits();
1844
1845  // Quiet the heap NaN if needed on target platform.
1846  if (des != NULL) Assembler::QuietNaN(heap_.nan_value());
1847
1848  deoptimizer_data_ = new DeoptimizerData;
1849  runtime_profiler_ = new RuntimeProfiler(this);
1850  runtime_profiler_->SetUp();
1851
1852  // If we are deserializing, log non-function code objects and compiled
1853  // functions found in the snapshot.
1854  if (des != NULL && (FLAG_log_code || FLAG_ll_prof)) {
1855    HandleScope scope;
1856    LOG(this, LogCodeObjects());
1857    LOG(this, LogCompiledFunctions());
1858  }
1859
1860  state_ = INITIALIZED;
1861  time_millis_at_init_ = OS::TimeCurrentMillis();
1862  return true;
1863}
1864
1865
1866// Initialized lazily to allow early
1867// v8::V8::SetAddHistogramSampleFunction calls.
1868StatsTable* Isolate::stats_table() {
1869  if (stats_table_ == NULL) {
1870    stats_table_ = new StatsTable;
1871  }
1872  return stats_table_;
1873}
1874
1875
1876void Isolate::Enter() {
1877  Isolate* current_isolate = NULL;
1878  PerIsolateThreadData* current_data = CurrentPerIsolateThreadData();
1879  if (current_data != NULL) {
1880    current_isolate = current_data->isolate_;
1881    ASSERT(current_isolate != NULL);
1882    if (current_isolate == this) {
1883      ASSERT(Current() == this);
1884      ASSERT(entry_stack_ != NULL);
1885      ASSERT(entry_stack_->previous_thread_data == NULL ||
1886             entry_stack_->previous_thread_data->thread_id().Equals(
1887                 ThreadId::Current()));
1888      // Same thread re-enters the isolate, no need to re-init anything.
1889      entry_stack_->entry_count++;
1890      return;
1891    }
1892  }
1893
1894  // Threads can have default isolate set into TLS as Current but not yet have
1895  // PerIsolateThreadData for it, as it requires more advanced phase of the
1896  // initialization. For example, a thread might be the one that system used for
1897  // static initializers - in this case the default isolate is set in TLS but
1898  // the thread did not yet Enter the isolate. If PerisolateThreadData is not
1899  // there, use the isolate set in TLS.
1900  if (current_isolate == NULL) {
1901    current_isolate = Isolate::UncheckedCurrent();
1902  }
1903
1904  PerIsolateThreadData* data = FindOrAllocatePerThreadDataForThisThread();
1905  ASSERT(data != NULL);
1906  ASSERT(data->isolate_ == this);
1907
1908  EntryStackItem* item = new EntryStackItem(current_data,
1909                                            current_isolate,
1910                                            entry_stack_);
1911  entry_stack_ = item;
1912
1913  SetIsolateThreadLocals(this, data);
1914
1915  // In case it's the first time some thread enters the isolate.
1916  set_thread_id(data->thread_id());
1917}
1918
1919
1920void Isolate::Exit() {
1921  ASSERT(entry_stack_ != NULL);
1922  ASSERT(entry_stack_->previous_thread_data == NULL ||
1923         entry_stack_->previous_thread_data->thread_id().Equals(
1924             ThreadId::Current()));
1925
1926  if (--entry_stack_->entry_count > 0) return;
1927
1928  ASSERT(CurrentPerIsolateThreadData() != NULL);
1929  ASSERT(CurrentPerIsolateThreadData()->isolate_ == this);
1930
1931  // Pop the stack.
1932  EntryStackItem* item = entry_stack_;
1933  entry_stack_ = item->previous_item;
1934
1935  PerIsolateThreadData* previous_thread_data = item->previous_thread_data;
1936  Isolate* previous_isolate = item->previous_isolate;
1937
1938  delete item;
1939
1940  // Reinit the current thread for the isolate it was running before this one.
1941  SetIsolateThreadLocals(previous_isolate, previous_thread_data);
1942}
1943
1944
1945#ifdef DEBUG
1946#define ISOLATE_FIELD_OFFSET(type, name, ignored)                       \
1947const intptr_t Isolate::name##_debug_offset_ = OFFSET_OF(Isolate, name##_);
1948ISOLATE_INIT_LIST(ISOLATE_FIELD_OFFSET)
1949ISOLATE_INIT_ARRAY_LIST(ISOLATE_FIELD_OFFSET)
1950#undef ISOLATE_FIELD_OFFSET
1951#endif
1952
1953} }  // namespace v8::internal
1954