[Isolates] Move contents of Top into Isolate....

src/top.h

Index: src/top.h
===================================================================
--- src/top.h	(revision 4906)
+++ src/top.h	(working copy)
@@ -1,383 +0,0 @@
-// Copyright 2006-2008 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
-//       with the distribution.
-//     * Neither the name of Google Inc. nor the names of its
-//       contributors may be used to endorse or promote products derived
-//       from this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-#ifndef V8_TOP_H_
-#define V8_TOP_H_
-
-#include "frames-inl.h"
-#include "isolate.h"
-
-namespace v8 {
-namespace internal {
-
-
-#define RETURN_IF_SCHEDULED_EXCEPTION() \
-  if (Top::has_scheduled_exception()) return Top::PromoteScheduledException()
-
-// Top has static variables used for JavaScript execution.
-
-class SaveContext;  // Forward declaration.
-class ThreadVisitor;  // Defined in v8threads.h
-
-#define TOP_ADDRESS_LIST(C)            \
-  C(handler_address)                   \
-  C(c_entry_fp_address)                \
-  C(context_address)                   \
-  C(pending_exception_address)         \
-  C(external_caught_exception_address)
-
-#ifdef ENABLE_LOGGING_AND_PROFILING
-#define TOP_ADDRESS_LIST_PROF(C)       \
-  C(js_entry_sp_address)
-#else
-#define TOP_ADDRESS_LIST_PROF(C)
-#endif
-
-
-class Top {
- public:
-  enum AddressId {
-#define C(name) k_##name,
-    TOP_ADDRESS_LIST(C)
-    TOP_ADDRESS_LIST_PROF(C)
-#undef C
-    k_top_address_count
-  };
-
-  static Address get_address_from_id(AddressId id);
-
-  // Access to top context (where the current function object was created).
-  static Context* context() { return thread_local()->context_; }
-  static void set_context(Context* context) {
-    thread_local()->context_ = context;
-  }
-  static Context** context_address() { return &thread_local()->context_; }
-
-  static SaveContext* save_context() {return thread_local()->save_context_; }
-  static void set_save_context(SaveContext* save) {
-    thread_local()->save_context_ = save;
-  }
-
-  // Access to current thread id.
-  static int thread_id() { return thread_local()->thread_id_; }
-  static void set_thread_id(int id) { thread_local()->thread_id_ = id; }
-
-  // Interface to pending exception.
-  static Object* pending_exception() {
-    ASSERT(has_pending_exception());
-    return thread_local()->pending_exception_;
-  }
-  static bool external_caught_exception() {
-    return thread_local()->external_caught_exception_;
-  }
-  static void set_pending_exception(Object* exception) {
-    thread_local()->pending_exception_ = exception;
-  }
-  static void clear_pending_exception() {
-    thread_local()->pending_exception_ = HEAP->the_hole_value();
-  }
-
-  static Object** pending_exception_address() {
-    return &thread_local()->pending_exception_;
-  }
-  static bool has_pending_exception() {
-    return !thread_local()->pending_exception_->IsTheHole();
-  }
-  static void clear_pending_message() {
-    thread_local()->has_pending_message_ = false;
-    thread_local()->pending_message_ = NULL;
-    thread_local()->pending_message_obj_ = HEAP->the_hole_value();
-    thread_local()->pending_message_script_ = NULL;
-  }
-  static v8::TryCatch* try_catch_handler() {
-    return thread_local()->TryCatchHandler();
-  }
-  static Address try_catch_handler_address() {
-    return thread_local()->try_catch_handler_address();
-  }
-  // This method is called by the api after operations that may throw
-  // exceptions.  If an exception was thrown and not handled by an external
-  // handler the exception is scheduled to be rethrown when we return to running
-  // JavaScript code.  If an exception is scheduled true is returned.
-  static bool OptionalRescheduleException(bool is_bottom_call);
-
-
-  static bool* external_caught_exception_address() {
-    return &thread_local()->external_caught_exception_;
-  }
-
-  static Object** scheduled_exception_address() {
-    return &thread_local()->scheduled_exception_;
-  }
-
-  static Object* scheduled_exception() {
-    ASSERT(has_scheduled_exception());
-    return thread_local()->scheduled_exception_;
-  }
-  static bool has_scheduled_exception() {
-    return !thread_local()->scheduled_exception_->IsTheHole();
-  }
-  static void clear_scheduled_exception() {
-    thread_local()->scheduled_exception_ = HEAP->the_hole_value();
-  }
-
-  static void setup_external_caught() {
-    thread_local()->external_caught_exception_ =
-        has_pending_exception() &&
-        (thread_local()->catcher_ != NULL) &&
-        (try_catch_handler() == thread_local()->catcher_);
-  }
-
-  // Tells whether the current context has experienced an out of memory
-  // exception.
-  static bool is_out_of_memory();
-
-  // JS execution stack (see frames.h).
-  static Address c_entry_fp(ThreadLocalTop* thread) {
-    return thread->c_entry_fp_;
-  }
-  static Address handler(ThreadLocalTop* thread) { return thread->handler_; }
-
-  static inline Address* c_entry_fp_address() {
-    return &thread_local()->c_entry_fp_;
-  }
-  static inline Address* handler_address() { return &thread_local()->handler_; }
-
-#ifdef ENABLE_LOGGING_AND_PROFILING
-  // Bottom JS entry (see StackTracer::Trace in log.cc).
-  static Address js_entry_sp(ThreadLocalTop* thread) {
-    return thread->js_entry_sp_;
-  }
-  static inline Address* js_entry_sp_address() {
-    return &thread_local()->js_entry_sp_;
-  }
-#endif
-
-  // Generated code scratch locations.
-  static void* formal_count_address() { return &thread_local()->formal_count_; }
-
-  static void MarkCompactPrologue(bool is_compacting);
-  static void MarkCompactEpilogue(bool is_compacting);
-  static void MarkCompactPrologue(bool is_compacting,
-                                  char* archived_thread_data);
-  static void MarkCompactEpilogue(bool is_compacting,
-                                  char* archived_thread_data);
-  static void PrintCurrentStackTrace(FILE* out);
-  static void PrintStackTrace(FILE* out, char* thread_data);
-  static void PrintStack(StringStream* accumulator);
-  static void PrintStack();
-  static Handle<String> StackTraceString();
-  static Local<StackTrace> CaptureCurrentStackTrace(
-      int frame_limit,
-      StackTrace::StackTraceOptions options);
-
-  // Returns if the top context may access the given global object. If
-  // the result is false, the pending exception is guaranteed to be
-  // set.
-  static bool MayNamedAccess(JSObject* receiver,
-                             Object* key,
-                             v8::AccessType type);
-  static bool MayIndexedAccess(JSObject* receiver,
-                               uint32_t index,
-                               v8::AccessType type);
-
-  static void SetFailedAccessCheckCallback(
-      v8::FailedAccessCheckCallback callback);
-  static void ReportFailedAccessCheck(JSObject* receiver, v8::AccessType type);
-
-  // Exception throwing support. The caller should use the result
-  // of Throw() as its return value.
-  static Failure* Throw(Object* exception, MessageLocation* location = NULL);
-  // Re-throw an exception.  This involves no error reporting since
-  // error reporting was handled when the exception was thrown
-  // originally.
-  static Failure* ReThrow(Object* exception, MessageLocation* location = NULL);
-  static void ScheduleThrow(Object* exception);
-  static void ReportPendingMessages();
-  static Failure* ThrowIllegalOperation();
-
-  // Promote a scheduled exception to pending. Asserts has_scheduled_exception.
-  static Object* PromoteScheduledException();
-  static void DoThrow(Object* exception,
-                      MessageLocation* location,
-                      const char* message);
-  static bool ShouldReturnException(bool* is_caught_externally,
-                                    bool catchable_by_javascript);
-  static void ReportUncaughtException(Handle<Object> exception,
-                                      MessageLocation* location,
-                                      Handle<String> stack_trace);
-
-  // Attempts to compute the current source location, storing the
-  // result in the target out parameter.
-  static void ComputeLocation(MessageLocation* target);
-
-  // Override command line flag.
-  static void TraceException(bool flag);
-
-  // Out of resource exception helpers.
-  static Failure* StackOverflow();
-  static Failure* TerminateExecution();
-
-  // Administration
-  static void Initialize();
-  static void TearDown();
-  static void Iterate(ObjectVisitor* v);
-  static void Iterate(ObjectVisitor* v, ThreadLocalTop* t);
-  static char* Iterate(ObjectVisitor* v, char* t);
-  static void IterateThread(ThreadVisitor* v);
-  static void IterateThread(ThreadVisitor* v, char* t);
-
-  // Returns the global object of the current context. It could be
-  // a builtin object, or a js global object.
-  static Handle<GlobalObject> global() {
-    return Handle<GlobalObject>(context()->global());
-  }
-
-  // Returns the global proxy object of the current context.
-  static Object* global_proxy() {
-    return context()->global_proxy();
-  }
-
-  // Returns the current global context.
-  static Handle<Context> global_context();
-
-  // Returns the global context of the calling JavaScript code.  That
-  // is, the global context of the top-most JavaScript frame.
-  static Handle<Context> GetCallingGlobalContext();
-
-  static Handle<JSBuiltinsObject> builtins() {
-    return Handle<JSBuiltinsObject>(thread_local()->context_->builtins());
-  }
-
-  static void RegisterTryCatchHandler(v8::TryCatch* that);
-  static void UnregisterTryCatchHandler(v8::TryCatch* that);
-
-#define TOP_GLOBAL_CONTEXT_FIELD_ACCESSOR(index, type, name)  \
-  static Handle<type> name() {                                \
-    return Handle<type>(context()->global_context()->name()); \
-  }
-  GLOBAL_CONTEXT_FIELDS(TOP_GLOBAL_CONTEXT_FIELD_ACCESSOR)
-#undef TOP_GLOBAL_CONTEXT_FIELD_ACCESSOR
-
-  static int ArchiveSpacePerThread() { return sizeof(ThreadLocalTop); }
-  static char* ArchiveThread(char* to);
-  static char* RestoreThread(char* from);
-  static void FreeThreadResources() { thread_local()->Free(); }
-
-  static const char* kStackOverflowMessage;
-
- private:
-  // The context that initiated this JS execution.
-  static ThreadLocalTop* thread_local() {
-    return Isolate::Current()->thread_local_top();
-  }
-  static void InitializeThreadLocal();
-  static void PrintStackTrace(FILE* out, ThreadLocalTop* thread);
-  static void MarkCompactPrologue(bool is_compacting,
-                                  ThreadLocalTop* archived_thread_data);
-  static void MarkCompactEpilogue(bool is_compacting,
-                                  ThreadLocalTop* archived_thread_data);
-
-  friend class SaveContext;
-  friend class AssertNoContextChange;
-  friend class ExecutionAccess;
-
-  static void FillCache();
-};
-
-
-// If the GCC version is 4.1.x or 4.2.x an additional field is added to the
-// class as a work around for a bug in the generated code found with these
-// versions of GCC. See V8 issue 122 for details.
-class SaveContext BASE_EMBEDDED {
- public:
-  SaveContext()
-      : context_(Top::context()),
-#if __GNUC_VERSION__ >= 40100 && __GNUC_VERSION__ < 40300
-        dummy_(Top::context()),
-#endif
-        prev_(Top::save_context()) {
-    Top::set_save_context(this);
-
-    // If there is no JS frame under the current C frame, use the value 0.
-    JavaScriptFrameIterator it;
-    js_sp_ = it.done() ? 0 : it.frame()->sp();
-  }
-
-  ~SaveContext() {
-    Top::set_context(*context_);
-    Top::set_save_context(prev_);
-  }
-
-  Handle<Context> context() { return context_; }
-  SaveContext* prev() { return prev_; }
-
-  // Returns true if this save context is below a given JavaScript frame.
-  bool below(JavaScriptFrame* frame) {
-    return (js_sp_ == 0) || (frame->sp() < js_sp_);
-  }
-
- private:
-  Handle<Context> context_;
-#if __GNUC_VERSION__ >= 40100 && __GNUC_VERSION__ < 40300
-  Handle<Context> dummy_;
-#endif
-  SaveContext* prev_;
-  Address js_sp_;  // The top JS frame's sp when saving context.
-};
-
-
-class AssertNoContextChange BASE_EMBEDDED {
-#ifdef DEBUG
- public:
-  AssertNoContextChange() :
-      context_(Top::context()) {
-  }
-
-  ~AssertNoContextChange() {
-    ASSERT(Top::context() == *context_);
-  }
-
- private:
-  HandleScope scope_;
-  Handle<Context> context_;
-#else
- public:
-  AssertNoContextChange() { }
-#endif
-};
-
-
-class ExecutionAccess BASE_EMBEDDED {
- public:
-  ExecutionAccess();
-  ~ExecutionAccess();
-};
-
-} }  // namespace v8::internal
-
-#endif  // V8_TOP_H_