[inspector] cache stack frame for call sites

src/objects.h

Index: src/objects.h
diff --git a/src/objects.h b/src/objects.h
index 947198b9caba452be8f2102519ae4849c7e15b2f..55f03f886f3007c5eea472fea3e6371d2534cfd5 100644
--- a/src/objects.h
+++ b/src/objects.h
@@ -145,6 +145,7 @@
 //       - DebugInfo
 //       - BreakPointInfo
 //       - StackFrameInfo
+//       - SourcePositionTableWithFrameCache
 //       - CodeCache
 //       - PrototypeInfo
 //       - Module
@@ -359,6 +360,7 @@ const int kStubMinorKeyBits = kSmiValueSize - kStubMajorKeyBits - 1;
   V(DEBUG_INFO_TYPE)                                            \
   V(BREAK_POINT_INFO_TYPE)                                      \
   V(STACK_FRAME_INFO_TYPE)                                      \
+  V(SOURCE_POSITION_TABLE_WITH_FRAME_CACHE_TYPE)                \
   V(PROTOTYPE_INFO_TYPE)                                        \
   V(TUPLE2_TYPE)                                                \
   V(TUPLE3_TYPE)                                                \
@@ -511,33 +513,35 @@ const int kStubMinorKeyBits = kSmiValueSize - kStubMajorKeyBits - 1;
 // Note that for subtle reasons related to the ordering or numerical values of
 // type tags, elements in this list have to be added to the INSTANCE_TYPE_LIST
 // manually.
-#define STRUCT_LIST(V)                                                       \
-  V(ACCESSOR_INFO, AccessorInfo, accessor_info)                              \
-  V(ACCESSOR_PAIR, AccessorPair, accessor_pair)                              \
-  V(ACCESS_CHECK_INFO, AccessCheckInfo, access_check_info)                   \
-  V(INTERCEPTOR_INFO, InterceptorInfo, interceptor_info)                     \
-  V(CALL_HANDLER_INFO, CallHandlerInfo, call_handler_info)                   \
-  V(FUNCTION_TEMPLATE_INFO, FunctionTemplateInfo, function_template_info)    \
-  V(OBJECT_TEMPLATE_INFO, ObjectTemplateInfo, object_template_info)          \
-  V(ALLOCATION_SITE, AllocationSite, allocation_site)                        \
-  V(ALLOCATION_MEMENTO, AllocationMemento, allocation_memento)               \
-  V(SCRIPT, Script, script)                                                  \
-  V(TYPE_FEEDBACK_INFO, TypeFeedbackInfo, type_feedback_info)                \
-  V(ALIASED_ARGUMENTS_ENTRY, AliasedArgumentsEntry, aliased_arguments_entry) \
-  V(PROMISE_RESOLVE_THENABLE_JOB_INFO, PromiseResolveThenableJobInfo,        \
-    promise_resolve_thenable_job_info)                                       \
-  V(PROMISE_REACTION_JOB_INFO, PromiseReactionJobInfo,                       \
-    promise_reaction_job_info)                                               \
-  V(DEBUG_INFO, DebugInfo, debug_info)                                       \
-  V(BREAK_POINT_INFO, BreakPointInfo, break_point_info)                      \
-  V(STACK_FRAME_INFO, StackFrameInfo, stack_frame_info)                      \
-  V(PROTOTYPE_INFO, PrototypeInfo, prototype_info)                           \
-  V(TUPLE2, Tuple2, tuple2)                                                  \
-  V(TUPLE3, Tuple3, tuple3)                                                  \
-  V(CONTEXT_EXTENSION, ContextExtension, context_extension)                  \
-  V(CONSTANT_ELEMENTS_PAIR, ConstantElementsPair, constant_elements_pair)    \
-  V(MODULE, Module, module)                                                  \
-  V(MODULE_INFO_ENTRY, ModuleInfoEntry, module_info_entry)                   \
+#define STRUCT_LIST(V)                                                         \
+  V(ACCESSOR_INFO, AccessorInfo, accessor_info)                                \
+  V(ACCESSOR_PAIR, AccessorPair, accessor_pair)                                \
+  V(ACCESS_CHECK_INFO, AccessCheckInfo, access_check_info)                     \
+  V(INTERCEPTOR_INFO, InterceptorInfo, interceptor_info)                       \
+  V(CALL_HANDLER_INFO, CallHandlerInfo, call_handler_info)                     \
+  V(FUNCTION_TEMPLATE_INFO, FunctionTemplateInfo, function_template_info)      \
+  V(OBJECT_TEMPLATE_INFO, ObjectTemplateInfo, object_template_info)            \
+  V(ALLOCATION_SITE, AllocationSite, allocation_site)                          \
+  V(ALLOCATION_MEMENTO, AllocationMemento, allocation_memento)                 \
+  V(SCRIPT, Script, script)                                                    \
+  V(TYPE_FEEDBACK_INFO, TypeFeedbackInfo, type_feedback_info)                  \
+  V(ALIASED_ARGUMENTS_ENTRY, AliasedArgumentsEntry, aliased_arguments_entry)   \
+  V(PROMISE_RESOLVE_THENABLE_JOB_INFO, PromiseResolveThenableJobInfo,          \
+    promise_resolve_thenable_job_info)                                         \
+  V(PROMISE_REACTION_JOB_INFO, PromiseReactionJobInfo,                         \
+    promise_reaction_job_info)                                                 \
+  V(DEBUG_INFO, DebugInfo, debug_info)                                         \
+  V(BREAK_POINT_INFO, BreakPointInfo, break_point_info)                        \
+  V(STACK_FRAME_INFO, StackFrameInfo, stack_frame_info)                        \
+  V(SOURCE_POSITION_TABLE_WITH_FRAME_CACHE, SourcePositionTableWithFrameCache, \
+    source_position_table_with_frame_cache)                                    \
+  V(PROTOTYPE_INFO, PrototypeInfo, prototype_info)                             \
+  V(TUPLE2, Tuple2, tuple2)                                                    \
+  V(TUPLE3, Tuple3, tuple3)                                                    \
+  V(CONTEXT_EXTENSION, ContextExtension, context_extension)                    \
+  V(CONSTANT_ELEMENTS_PAIR, ConstantElementsPair, constant_elements_pair)      \
+  V(MODULE, Module, module)                                                    \
+  V(MODULE_INFO_ENTRY, ModuleInfoEntry, module_info_entry)                     \
   V(ASYNC_GENERATOR_REQUEST, AsyncGeneratorRequest, async_generator_request)
 
 // We use the full 8 bits of the instance_type field to encode heap object
@@ -703,6 +707,7 @@ enum InstanceType {
   DEBUG_INFO_TYPE,
   BREAK_POINT_INFO_TYPE,
   STACK_FRAME_INFO_TYPE,
+  SOURCE_POSITION_TABLE_WITH_FRAME_CACHE_TYPE,
   PROTOTYPE_INFO_TYPE,
   TUPLE2_TYPE,
   TUPLE3_TYPE,
@@ -3294,8 +3299,10 @@ class BytecodeArray : public FixedArrayBase {
   DECL_ACCESSORS(handler_table, FixedArray)
 
   // Accessors for source position table containing mappings between byte code
-  // offset and source position.
-  DECL_ACCESSORS(source_position_table, ByteArray)
+  // offset and source position or SourcePositionTableWithFrameCache.
+  DECL_ACCESSORS(source_position_table, Object)
+
+  inline ByteArray* SourcePositionTable();
 
   DECLARE_CAST(BytecodeArray)
 
@@ -3707,8 +3714,11 @@ class Code: public HeapObject {
   // [deoptimization_data]: Array containing data for deopt.
   DECL_ACCESSORS(deoptimization_data, FixedArray)
 
-  // [source_position_table]: ByteArray for the source positions table.
-  DECL_ACCESSORS(source_position_table, ByteArray)
+  // [source_position_table]: ByteArray for the source positions table or
+  // SourcePositionTableWithFrameCache.
+  DECL_ACCESSORS(source_position_table, Object)
+
+  inline ByteArray* SourcePositionTable();
 
   // [trap_handler_index]: An index into the trap handler's master list of code
   // objects.
@@ -4240,6 +4250,11 @@ class AbstractCode : public HeapObject {
   // Set the source position table.
   inline void set_source_position_table(ByteArray* source_position_table);
 
+  inline Object* stack_frame_cache();
+  static void SetStackFrameCache(Handle<AbstractCode> abstract_code,
+                                 Handle<UnseededNumberDictionary> cache);
+  void DropStackFrameCache();
+
   // Returns the size of instructions and the metadata.
   inline int SizeIncludingMetadata();
 
@@ -10143,6 +10158,26 @@ class StackFrameInfo : public Struct {
   DISALLOW_IMPLICIT_CONSTRUCTORS(StackFrameInfo);
 };
 
+class SourcePositionTableWithFrameCache : public Struct {
+ public:
+  DECL_ACCESSORS(source_position_table, ByteArray)
+  DECL_ACCESSORS(stack_frame_cache, UnseededNumberDictionary)
+
+  DECLARE_CAST(SourcePositionTableWithFrameCache)
+
+  // Dispatched behavior.
+  DECLARE_PRINTER(SourcePositionTableWithFrameCache)
+  DECLARE_VERIFIER(SourcePositionTableWithFrameCache)
+
+  static const int kSourcePositionTableIndex = Struct::kHeaderSize;
+  static const int kStackFrameCacheIndex =
+      kSourcePositionTableIndex + kPointerSize;
+  static const int kSize = kStackFrameCacheIndex + kPointerSize;
+
+ private:
+  DISALLOW_IMPLICIT_CONSTRUCTORS(SourcePositionTableWithFrameCache);
+};
+
 #define VISITOR_SYNCHRONIZATION_TAGS_LIST(V)                               \
   V(kStringTable, "string_table", "(Internalized strings)")                \
   V(kExternalStringsTable, "external_strings_table", "(External strings)") \