Store OSR'd optimized code on the native context.

src/contexts.h

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef V8_CONTEXTS_H_
 #define V8_CONTEXTS_H_
 
 #include "src/heap/heap.h"
 #include "src/objects.h"
 
@@ skipping 264 matching lines @@
   V(MAP_ITERATOR_MAP_INDEX, Map, map_iterator_map)                             \
   V(MATH_RANDOM_INDEX_INDEX, Smi, math_random_index)                           \
   V(MATH_RANDOM_CACHE_INDEX, Object, math_random_cache)                        \
   V(MESSAGE_LISTENERS_INDEX, TemplateList, message_listeners)                  \
   V(NATIVES_UTILS_OBJECT_INDEX, Object, natives_utils_object)                  \
   V(NORMALIZED_MAP_CACHE_INDEX, Object, normalized_map_cache)                  \
   V(NUMBER_FUNCTION_INDEX, JSFunction, number_function)                        \
   V(OBJECT_FUNCTION_INDEX, JSFunction, object_function)                        \
   V(OBJECT_FUNCTION_PROTOTYPE_MAP_INDEX, Map, object_function_prototype_map)   \
   V(OPAQUE_REFERENCE_FUNCTION_INDEX, JSFunction, opaque_reference_function)    \
+  V(OSRD_OPTIMIZED_TABLE_INDEX, FixedArray, osrd_function_table)               \

[Michael Starzinger, 2016/12/07 09:26:31]

nit: The table stores code, not functions. How would you feel about naming this
"osr_code_table" instead? Also, please keep the enum and the accessor name in
sync.

[mvstanton, 2016/12/07 14:42:32]

Good idea, thanks.

   V(PROXY_CALLABLE_MAP_INDEX, Map, proxy_callable_map)                         \
   V(PROXY_CONSTRUCTOR_MAP_INDEX, Map, proxy_constructor_map)                   \
   V(PROXY_FUNCTION_INDEX, JSFunction, proxy_function)                          \
   V(PROXY_FUNCTION_MAP_INDEX, Map, proxy_function_map)                         \
   V(PROXY_MAP_INDEX, Map, proxy_map)                                           \
   V(PROMISE_RESOLVE_SHARED_FUN, SharedFunctionInfo,                            \
     promise_resolve_shared_fun)                                                \
   V(PROMISE_REJECT_SHARED_FUN, SharedFunctionInfo, promise_reject_shared_fun)  \
   V(REGEXP_EXEC_FUNCTION_INDEX, JSFunction, regexp_exec_function)              \
   V(REGEXP_FUNCTION_INDEX, JSFunction, regexp_function)                        \
@@ skipping 254 matching lines @@
   inline bool IsFunctionContext();
   inline bool IsCatchContext();
   inline bool IsWithContext();
   inline bool IsDebugEvaluateContext();
   inline bool IsBlockContext();
   inline bool IsModuleContext();
   inline bool IsScriptContext();
 
   inline bool HasSameSecurityTokenAs(Context* that);
 
+  // Removes a specific optimized code object from the optimized code map.
+  // In case of non-OSR the code reference is cleared from the cache entry but
+  // the entry itself is left in the map in order to proceed sharing literals.
+  void EvictFromOptimizedCodeMap(Code* optimized_code, const char* reason);
+
+  // Clear optimized code map.
+  void ClearOptimizedCodeMap();
+
+  // A native context keeps track of all osrd optimized functions.
+  inline bool OptimizedCodeMapIsCleared();
+  void SearchOptimizedCodeMap(SharedFunctionInfo* shared, BailoutId osr_ast_id,
+                              Code** pcode, LiteralsArray** pliterals);
+  int SearchOptimizedCodeMapEntry(SharedFunctionInfo* shared,
+                                  BailoutId osr_ast_id);
+
+  static void AddToOptimizedCodeMap(Handle<Context> native_context,
+                                    Handle<SharedFunctionInfo> shared,
+                                    Handle<Code> code,
+                                    Handle<LiteralsArray> literals,
+                                    BailoutId osr_ast_id);
+
   // A native context holds a list of all functions with optimized code.
   void AddOptimizedFunction(JSFunction* function);
   void RemoveOptimizedFunction(JSFunction* function);
   void SetOptimizedFunctionsListHead(Object* head);
   Object* OptimizedFunctionsListHead();
 
   // The native context also stores a list of all optimized code and a
   // list of all deoptimized code, which are needed by the deoptimizer.
   void AddOptimizedCode(Code* code);
   void SetOptimizedCodeListHead(Object* head);
@@ skipping 95 matching lines @@
   STATIC_ASSERT(kHeaderSize == Internals::kContextHeaderSize);
   STATIC_ASSERT(EMBEDDER_DATA_INDEX == Internals::kContextEmbedderDataIndex);
 };
 
 typedef Context::Field ContextField;
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_CONTEXTS_H_