Remove preemption thread and API

src/isolate.cc

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 1752 matching lines @@
       handle_scope_implementer_(NULL),
       unicode_cache_(NULL),
       runtime_zone_(this),
       in_use_list_(0),
       free_list_(0),
       preallocated_storage_preallocated_(false),
       inner_pointer_to_code_cache_(NULL),
       write_iterator_(NULL),
       global_handles_(NULL),
       eternal_handles_(NULL),
-      context_switcher_(NULL),
       thread_manager_(NULL),
       fp_stubs_generated_(false),
       has_installed_extensions_(false),
       string_tracker_(NULL),
       regexp_stack_(NULL),
       date_cache_(NULL),
       code_stub_interface_descriptors_(NULL),
       // TODO(bmeurer) Initialized lazily because it depends on flags; can
       // be fixed once the default isolate cleanup is done.
       random_number_generator_(NULL),
@@ skipping 116 matching lines @@
     if (FLAG_print_deopt_stress) {
       PrintF(stdout, "=== Stress deopt counter: %u\n", stress_deopt_count_);
     }
 
     // We must stop the logger before we tear down other components.
     Sampler* sampler = logger_->sampler();
     if (sampler && sampler->IsActive()) sampler->Stop();
 
     delete deoptimizer_data_;
     deoptimizer_data_ = NULL;
-    if (FLAG_preemption) {
-      v8::Locker locker(reinterpret_cast<v8::Isolate*>(this));
-      v8::Locker::StopPreemption(reinterpret_cast<v8::Isolate*>(this));
-    }
     builtins_.TearDown();
     bootstrapper_->TearDown();
 
     // Remove the external reference to the preallocated stack memory.
     delete preallocated_message_space_;
     preallocated_message_space_ = NULL;
     PreallocatedMemoryThreadStop();
 
     if (runtime_profiler_ != NULL) {
       runtime_profiler_->TearDown();
@@ skipping 96 matching lines @@
 
   delete compilation_cache_;
   compilation_cache_ = NULL;
   delete bootstrapper_;
   bootstrapper_ = NULL;
   delete inner_pointer_to_code_cache_;
   inner_pointer_to_code_cache_ = NULL;
   delete write_iterator_;
   write_iterator_ = NULL;
 
-  delete context_switcher_;
-  context_switcher_ = NULL;
   delete thread_manager_;
   thread_manager_ = NULL;
 
   delete string_tracker_;
   string_tracker_ = NULL;
 
   delete memory_allocator_;
   memory_allocator_ = NULL;
   delete code_range_;
   code_range_ = NULL;
@@ skipping 202 matching lines @@
   if (FLAG_preallocate_message_memory && preallocated_message_space_ == NULL) {
     // Start the thread which will set aside some memory.
     PreallocatedMemoryThreadStart();
     preallocated_message_space_ =
         new NoAllocationStringAllocator(
             preallocated_memory_thread_->data(),
             preallocated_memory_thread_->length());
     PreallocatedStorageInit(preallocated_memory_thread_->length() / 4);
   }
 
-  if (FLAG_preemption) {
-    v8::Locker locker(reinterpret_cast<v8::Isolate*>(this));
-    v8::Locker::StartPreemption(reinterpret_cast<v8::Isolate*>(this), 100);
-  }
-
 #ifdef ENABLE_DEBUGGER_SUPPORT
   debug_->SetUp(create_heap_objects);
 #endif
 
   // If we are deserializing, read the state into the now-empty heap.
   if (!create_heap_objects) {
     des->Deserialize(this);
   }
   stub_cache_->Initialize();
 
@@ skipping 257 matching lines @@
 
 #ifdef DEBUG
 #define ISOLATE_FIELD_OFFSET(type, name, ignored)                       \
 const intptr_t Isolate::name##_debug_offset_ = OFFSET_OF(Isolate, name##_);
 ISOLATE_INIT_LIST(ISOLATE_FIELD_OFFSET)
 ISOLATE_INIT_ARRAY_LIST(ISOLATE_FIELD_OFFSET)
 #undef ISOLATE_FIELD_OFFSET
 #endif
 
 } }  // namespace v8::internal