Decouple allocation and creation of deopt tables

src/deoptimizer.h

 // 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 82 matching lines @@
 class DeoptimizerData {
  public:
   DeoptimizerData();
   ~DeoptimizerData();
 
 #ifdef ENABLE_DEBUGGER_SUPPORT
   void Iterate(ObjectVisitor* v);
 #endif
 
  private:
-  MemoryChunk* eager_deoptimization_entry_code_;
-  MemoryChunk* lazy_deoptimization_entry_code_;
+  int eager_deoptimization_entry_code_entries_;
+  int lazy_deoptimization_entry_code_entries_;
+  VirtualMemory* eager_deoptimization_entry_code_;
+  VirtualMemory* lazy_deoptimization_entry_code_;
   Deoptimizer* current_;
 
 #ifdef ENABLE_DEBUGGER_SUPPORT
   DeoptimizedFrameInfo* deoptimized_frame_info_;
 #endif
 
   // List of deoptimized code which still have references from active stack
   // frames. These code objects are needed by the deoptimizer when deoptimizing
   // a frame for which the code object for the function function has been
   // changed from the code present when deoptimizing was done.
@@ skipping 104 matching lines @@
   void MaterializeHeapNumbersForDebuggerInspectableFrame(
       Address parameters_top,
       uint32_t parameters_size,
       Address expressions_top,
       uint32_t expressions_size,
       DeoptimizedFrameInfo* info);
 #endif
 
   static void ComputeOutputFrames(Deoptimizer* deoptimizer);
 
-  static Address GetDeoptimizationEntry(int id, BailoutType type);
+
+  enum GetEntryMode {
+    CALCULATE_ENTRY_ADDRESS,
+    ENSURE_ENTRY_CODE
+  };
+
+
+  static Address GetDeoptimizationEntry(
+      int id,
+      BailoutType type,
+      GetEntryMode mode = ENSURE_ENTRY_CODE);
   static int GetDeoptimizationId(Address addr, BailoutType type);
   static int GetOutputInfo(DeoptimizationOutputData* data,
                            BailoutId node_id,
                            SharedFunctionInfo* shared);
 
   // Code generation support.
   static int input_offset() { return OFFSET_OF(Deoptimizer, input_); }
   static int output_count_offset() {
     return OFFSET_OF(Deoptimizer, output_count_);
   }
@@ skipping 36 matching lines @@
     virtual void GeneratePrologue();
 
    private:
     int count() const { return count_; }
 
     int count_;
   };
 
   int ConvertJSFrameIndexToFrameIndex(int jsframe_index);
 
+  static size_t GetMaxDeoptTableSize();
+
  private:
-  static const int kNumberOfEntries = 16384;
+  static const int kMinNumberOfEntries = 64;
+  static const int kMaxNumberOfEntries = 16384;
 
   Deoptimizer(Isolate* isolate,
               JSFunction* function,
               BailoutType type,
               unsigned bailout_id,
               Address from,
               int fp_to_sp_delta,
               Code* optimized_code);
   void DeleteFrameDescriptions();
 
@@ skipping 22 matching lines @@
 
   unsigned ComputeIncomingArgumentSize(JSFunction* function) const;
   unsigned ComputeOutgoingArgumentSize() const;
 
   Object* ComputeLiteral(int index) const;
 
   void AddArgumentsObject(intptr_t slot_address, int argc);
   void AddArgumentsObjectValue(intptr_t value);
   void AddDoubleValue(intptr_t slot_address, double value);
 
-  static MemoryChunk* CreateCode(BailoutType type);
+  static void EnsureCodeForDeoptimizationEntry(BailoutType type,
+                                               int max_entry_id);
   static void GenerateDeoptimizationEntries(
       MacroAssembler* masm, int count, BailoutType type);
 
   // Weak handle callback for deoptimizing code objects.
   static void HandleWeakDeoptimizedCode(
       v8::Persistent<v8::Value> obj, void* data);
   static Code* FindDeoptimizingCodeFromAddress(Address addr);
   static void RemoveDeoptimizingCode(Code* code);
 
   // Fill the input from from a JavaScript frame. This is used when
@@ skipping 492 matching lines @@
   Object** expression_stack_;
   int source_position_;
 
   friend class Deoptimizer;
 };
 #endif
 
 } }  // namespace v8::internal
 
 #endif  // V8_DEOPTIMIZER_H_