Decouple allocation and creation of deopt tables

src/deoptimizer.h

Index: src/deoptimizer.h
diff --git a/src/deoptimizer.h b/src/deoptimizer.h
index f67f986ba1b13467517265619a1f512801904f64..4aa38cefee08263bf926186d89617e223964a0a2 100644
--- a/src/deoptimizer.h
+++ b/src/deoptimizer.h
@@ -100,8 +100,10 @@ class DeoptimizerData {
 #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
@@ -226,7 +228,17 @@ class Deoptimizer : public Malloced {
 
   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,
@@ -283,8 +295,11 @@ class Deoptimizer : public Malloced {
 
   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,
@@ -327,7 +342,8 @@ class Deoptimizer : public Malloced {
   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);