[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 128 matching lines @@
 //       - InterceptorInfo
 //       - CallHandlerInfo
 //       - TemplateInfo
 //         - FunctionTemplateInfo
 //         - ObjectTemplateInfo
 //       - Script
 //       - DebugInfo
 //       - BreakPointInfo
 //       - StackFrameInfo
 //       - StackTraceInfo
+//       - 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 195 matching lines @@
   V(ALLOCATION_MEMENTO_TYPE)                                    \
   V(SCRIPT_TYPE)                                                \
   V(TYPE_FEEDBACK_INFO_TYPE)                                    \
   V(ALIASED_ARGUMENTS_ENTRY_TYPE)                               \
   V(PROMISE_RESOLVE_THENABLE_JOB_INFO_TYPE)                     \
   V(PROMISE_REACTION_JOB_INFO_TYPE)                             \
   V(DEBUG_INFO_TYPE)                                            \
   V(BREAK_POINT_INFO_TYPE)                                      \
   V(STACK_FRAME_INFO_TYPE)                                      \
   V(STACK_TRACE_INFO_TYPE)                                      \
+  V(SOURCE_POSITION_TABLE_WITH_FRAME_CACHE_TYPE)                \
   V(PROTOTYPE_INFO_TYPE)                                        \
   V(TUPLE2_TYPE)                                                \
   V(TUPLE3_TYPE)                                                \
   V(CONTEXT_EXTENSION_TYPE)                                     \
   V(CONSTANT_ELEMENTS_PAIR_TYPE)                                \
   V(MODULE_TYPE)                                                \
   V(MODULE_INFO_ENTRY_TYPE)                                     \
   V(ASYNC_GENERATOR_REQUEST_TYPE)                               \
   V(FIXED_ARRAY_TYPE)                                           \
   V(TRANSITION_ARRAY_TYPE)                                      \
@@ skipping 132 matching lines @@
 
 // A struct is a simple object a set of object-valued fields.  Including an
 // object type in this causes the compiler to generate most of the boilerplate
 // code for the class including allocation and garbage collection routines,
 // casts and predicates.  All you need to define is the class, methods and
 // object verification routines.  Easy, no?
 //
 // 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(STACK_TRACE_INFO, StackTraceInfo, stack_trace_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(STACK_TRACE_INFO, StackTraceInfo, stack_trace_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
 // instance types.  The high-order bit (bit 7) is set if the object is not a
 // string, and cleared if it is a string.
 const uint32_t kIsNotStringMask = 0x80;
 const uint32_t kStringTag = 0x0;
 const uint32_t kNotStringTag = 0x80;
 
 // Bit 6 indicates that the object is an internalized string (if set) or not.
@@ skipping 146 matching lines @@
   ALLOCATION_MEMENTO_TYPE,
   SCRIPT_TYPE,
   TYPE_FEEDBACK_INFO_TYPE,
   ALIASED_ARGUMENTS_ENTRY_TYPE,
   PROMISE_RESOLVE_THENABLE_JOB_INFO_TYPE,
   PROMISE_REACTION_JOB_INFO_TYPE,
   DEBUG_INFO_TYPE,
   BREAK_POINT_INFO_TYPE,
   STACK_FRAME_INFO_TYPE,
   STACK_TRACE_INFO_TYPE,
+  SOURCE_POSITION_TABLE_WITH_FRAME_CACHE_TYPE,
   PROTOTYPE_INFO_TYPE,
   TUPLE2_TYPE,
   TUPLE3_TYPE,
   CONTEXT_EXTENSION_TYPE,
   CONSTANT_ELEMENTS_PAIR_TYPE,
   MODULE_TYPE,
   MODULE_INFO_ENTRY_TYPE,
   ASYNC_GENERATOR_REQUEST_TYPE,
   FIXED_ARRAY_TYPE,
   TRANSITION_ARRAY_TYPE,
@@ skipping 2571 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 5897 matching lines @@
   DECLARE_VERIFIER(StackTraceInfo)
 
   static const int kFramesIndex = Struct::kHeaderSize;
   static const int kOptionsIndex = kFramesIndex + kPointerSize;
   static const int kSize = kOptionsIndex + kPointerSize;
 
  private:
   DISALLOW_IMPLICIT_CONSTRUCTORS(StackTraceInfo);
 };
 
+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)") \
   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_