[inspector] cache stack frame for call sites

src/objects.h

 // Copyright 2015 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_OBJECTS_H_
 #define V8_OBJECTS_H_
 
 #include <iosfwd>
 #include <memory>
 
@@ skipping 127 matching lines @@
 //       - AccessCheckInfo
 //       - InterceptorInfo
 //       - CallHandlerInfo
 //       - TemplateInfo
 //         - FunctionTemplateInfo
 //         - ObjectTemplateInfo
 //       - Script
 //       - DebugInfo
 //       - BreakPointInfo
 //       - StackFrameInfo
+//       - SourcePositionTableWithFrameCache
 //       - CodeCache
 //       - PrototypeInfo
 //       - Module
 //       - ModuleInfoEntry
 //     - WeakCell
 //
 // Formats of Object*:
 //  Smi:        [31 bit signed int] 0
 //  HeapObject: [32 bit direct pointer] (4 byte aligned) | 01
 
@@ skipping 933 matching lines @@
   V(External)                    \
   V(Struct)                      \
   V(Cell)                        \
   V(TemplateList)                \
   V(PropertyCell)                \
   V(WeakCell)                    \
   V(ObjectHashTable)             \
   V(ObjectHashSet)               \
   V(WeakHashTable)               \
   V(OrderedHashTable)            \
-  V(SloppyArgumentsElements)
+  V(SloppyArgumentsElements)     \
+  V(SourcePositionTableWithFrameCache)
 
 #define ODDBALL_LIST(V)                 \
   V(Undefined, undefined_value)         \
   V(Null, null_value)                   \
   V(TheHole, the_hole_value)            \
   V(Exception, exception)               \
   V(Uninitialized, uninitialized_value) \
   V(True, true_value)                   \
   V(False, false_value)                 \
   V(ArgumentsMarker, arguments_marker)  \
@@ skipping 2175 matching lines @@
   inline Age bytecode_age() const;
   inline void set_bytecode_age(Age age);
 
   // Accessors for the constant pool.
   DECL_ACCESSORS(constant_pool, FixedArray)
 
   // Accessors for handler table containing offsets of exception handlers.
   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)
 
   // Dispatched behavior.
   inline int BytecodeArraySize();
 
   inline int instruction_size();
 
   // Returns the size of bytecode and its metadata. This includes the size of
   // bytecode, constant pool, source position table, and handler table.
@@ skipping 391 matching lines @@
   DECL_ACCESSORS(relocation_info, ByteArray)
   void InvalidateRelocation();
   void InvalidateEmbeddedObjects();
 
   // [handler_table]: Fixed array containing offsets of exception handlers.
   DECL_ACCESSORS(handler_table, FixedArray)
 
   // [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.
   DECL_ACCESSORS(trap_handler_index, Smi)
 
   // [raw_type_feedback_info]: This field stores various things, depending on
   // the kind of the code object.
   //   FUNCTION           => type feedback information.
   //   STUB and ICs       => major/minor key as Smi.
   DECL_ACCESSORS(raw_type_feedback_info, Object)
@@ skipping 511 matching lines @@
 
   // Returns the size of the code instructions.
   inline int instruction_size();
 
   // Return the source position table.
   inline ByteArray* source_position_table();
 
   // 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();
 
   // Returns true if pc is inside this object's instructions.
   inline bool contains(byte* pc);
 
   // Returns the AbstractCode::Kind of the code.
   inline Kind kind();
 
   // Calculate the size of the code object to report for log events. This takes
@@ skipping 5887 matching lines @@
 
  private:
   // Bit position in the flag, from least significant bit position.
   static const int kIsEvalBit = 0;
   static const int kIsConstructorBit = 1;
   static const int kIsWasmBit = 2;
 
   DISALLOW_IMPLICIT_CONSTRUCTORS(StackFrameInfo);
 };
 
+class SourcePositionTableWithFrameCache : public Tuple2 {
+ public:
+  DECL_ACCESSORS(source_position_table, ByteArray)
+  DECL_ACCESSORS(stack_frame_cache, UnseededNumberDictionary)
+
+  DECLARE_CAST(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)") \
   V(kStrongRootList, "strong_root_list", "(Strong roots)")                 \
   V(kSmiRootList, "smi_root_list", "(Smi roots)")                          \
   V(kBootstrapper, "bootstrapper", "(Bootstrapper)")                       \
   V(kTop, "top", "(Isolate)")                                              \
   V(kRelocatable, "relocatable", "(Relocatable)")                          \
   V(kDebug, "debug", "(Debugger)")                                         \
   V(kCompilationCache, "compilationcache", "(Compilation cache)")          \
@@ skipping 93 matching lines @@
   }
 };
 
 
 }  // NOLINT, false-positive due to second-order macros.
 }  // NOLINT, false-positive due to second-order macros.
 
 #include "src/objects/object-macros-undef.h"
 
 #endif  // V8_OBJECTS_H_