[ext-code-space] Enable external code space on x64 and desktop arm64

Perf Sheriffs: this CL might regress some benchmarks while improving
the others.

Bug: v8:11880
Change-Id: Iddaba0512100eedf61d8b106da0be0a08d273b67
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3412072Reviewed-by: Toon Verwaest <verwaest@chromium.org>
Commit-Queue: Igor Sheludko <ishell@chromium.org>
Cr-Commit-Position: refs/heads/main@{#78743}

BUILD.gn

@@ -412,7 +412,9 @@ if (v8_enable_short_builtin_calls == "") {
       v8_current_cpu == "x64" || (!is_android && v8_current_cpu == "arm64")
 }
 if (v8_enable_external_code_space == "") {
-  v8_enable_external_code_space = false
+  v8_enable_external_code_space =
+      v8_enable_pointer_compression &&
+      (v8_current_cpu == "x64" || (!is_android && v8_current_cpu == "arm64"))
 }
 if (v8_enable_single_generation == "") {
   v8_enable_single_generation = v8_disable_write_barriers

tools/v8heapconst.py

@@ -265,109 +265,109 @@ INSTANCE_TYPES = {
 
 # List of known V8 maps.
 KNOWN_MAPS = {
-  ("read_only_space", 0x02131): (248, "MetaMap"),
-  ("read_only_space", 0x02159): (131, "NullMap"),
-  ("read_only_space", 0x02181): (232, "StrongDescriptorArrayMap"),
-  ("read_only_space", 0x021a9): (261, "WeakArrayListMap"),
-  ("read_only_space", 0x021ed): (157, "EnumCacheMap"),
-  ("read_only_space", 0x02221): (178, "FixedArrayMap"),
-  ("read_only_space", 0x0226d): (8, "OneByteInternalizedStringMap"),
-  ("read_only_space", 0x022b9): (245, "FreeSpaceMap"),
-  ("read_only_space", 0x022e1): (244, "OnePointerFillerMap"),
-  ("read_only_space", 0x02309): (244, "TwoPointerFillerMap"),
-  ("read_only_space", 0x02331): (131, "UninitializedMap"),
-  ("read_only_space", 0x023a9): (131, "UndefinedMap"),
-  ("read_only_space", 0x023ed): (130, "HeapNumberMap"),
-  ("read_only_space", 0x02421): (131, "TheHoleMap"),
-  ("read_only_space", 0x02481): (131, "BooleanMap"),
-  ("read_only_space", 0x02525): (192, "ByteArrayMap"),
-  ("read_only_space", 0x0254d): (178, "FixedCOWArrayMap"),
-  ("read_only_space", 0x02575): (179, "HashTableMap"),
-  ("read_only_space", 0x0259d): (128, "SymbolMap"),
-  ("read_only_space", 0x025c5): (40, "OneByteStringMap"),
-  ("read_only_space", 0x025ed): (254, "ScopeInfoMap"),
-  ("read_only_space", 0x02615): (255, "SharedFunctionInfoMap"),
-  ("read_only_space", 0x0263d): (238, "CodeMap"),
-  ("read_only_space", 0x02665): (237, "CellMap"),
-  ("read_only_space", 0x0268d): (253, "GlobalPropertyCellMap"),
-  ("read_only_space", 0x026b5): (204, "ForeignMap"),
-  ("read_only_space", 0x026dd): (236, "TransitionArrayMap"),
-  ("read_only_space", 0x02705): (45, "ThinOneByteStringMap"),
-  ("read_only_space", 0x0272d): (243, "FeedbackVectorMap"),
-  ("read_only_space", 0x02765): (131, "ArgumentsMarkerMap"),
-  ("read_only_space", 0x027c5): (131, "ExceptionMap"),
-  ("read_only_space", 0x02821): (131, "TerminationExceptionMap"),
-  ("read_only_space", 0x02889): (131, "OptimizedOutMap"),
-  ("read_only_space", 0x028e9): (131, "StaleRegisterMap"),
-  ("read_only_space", 0x02949): (191, "ScriptContextTableMap"),
-  ("read_only_space", 0x02971): (189, "ClosureFeedbackCellArrayMap"),
-  ("read_only_space", 0x02999): (242, "FeedbackMetadataArrayMap"),
-  ("read_only_space", 0x029c1): (178, "ArrayListMap"),
-  ("read_only_space", 0x029e9): (129, "BigIntMap"),
-  ("read_only_space", 0x02a11): (190, "ObjectBoilerplateDescriptionMap"),
-  ("read_only_space", 0x02a39): (193, "BytecodeArrayMap"),
-  ("read_only_space", 0x02a61): (239, "CodeDataContainerMap"),
-  ("read_only_space", 0x02a89): (240, "CoverageInfoMap"),
-  ("read_only_space", 0x02ab1): (194, "FixedDoubleArrayMap"),
-  ("read_only_space", 0x02ad9): (181, "GlobalDictionaryMap"),
-  ("read_only_space", 0x02b01): (159, "ManyClosuresCellMap"),
-  ("read_only_space", 0x02b29): (249, "MegaDomHandlerMap"),
-  ("read_only_space", 0x02b51): (178, "ModuleInfoMap"),
-  ("read_only_space", 0x02b79): (182, "NameDictionaryMap"),
-  ("read_only_space", 0x02ba1): (159, "NoClosuresCellMap"),
-  ("read_only_space", 0x02bc9): (184, "NumberDictionaryMap"),
-  ("read_only_space", 0x02bf1): (159, "OneClosureCellMap"),
-  ("read_only_space", 0x02c19): (185, "OrderedHashMapMap"),
-  ("read_only_space", 0x02c41): (186, "OrderedHashSetMap"),
-  ("read_only_space", 0x02c69): (183, "NameToIndexHashTableMap"),
-  ("read_only_space", 0x02c91): (187, "OrderedNameDictionaryMap"),
-  ("read_only_space", 0x02cb9): (251, "PreparseDataMap"),
-  ("read_only_space", 0x02ce1): (252, "PropertyArrayMap"),
-  ("read_only_space", 0x02d09): (153, "SideEffectCallHandlerInfoMap"),
-  ("read_only_space", 0x02d31): (153, "SideEffectFreeCallHandlerInfoMap"),
-  ("read_only_space", 0x02d59): (153, "NextCallSideEffectFreeCallHandlerInfoMap"),
-  ("read_only_space", 0x02d81): (188, "SimpleNumberDictionaryMap"),
-  ("read_only_space", 0x02da9): (228, "SmallOrderedHashMapMap"),
-  ("read_only_space", 0x02dd1): (229, "SmallOrderedHashSetMap"),
-  ("read_only_space", 0x02df9): (230, "SmallOrderedNameDictionaryMap"),
-  ("read_only_space", 0x02e21): (233, "SourceTextModuleMap"),
-  ("read_only_space", 0x02e49): (259, "SwissNameDictionaryMap"),
-  ("read_only_space", 0x02e71): (234, "SyntheticModuleMap"),
-  ("read_only_space", 0x02e99): (260, "WasmApiFunctionRefMap"),
-  ("read_only_space", 0x02ec1): (222, "WasmCapiFunctionDataMap"),
-  ("read_only_space", 0x02ee9): (223, "WasmExportedFunctionDataMap"),
-  ("read_only_space", 0x02f11): (205, "WasmInternalFunctionMap"),
-  ("read_only_space", 0x02f39): (224, "WasmJSFunctionDataMap"),
-  ("read_only_space", 0x02f61): (206, "WasmTypeInfoMap"),
-  ("read_only_space", 0x02f89): (235, "WeakFixedArrayMap"),
-  ("read_only_space", 0x02fb1): (180, "EphemeronHashTableMap"),
-  ("read_only_space", 0x02fd9): (241, "EmbedderDataArrayMap"),
-  ("read_only_space", 0x03001): (262, "WeakCellMap"),
-  ("read_only_space", 0x03029): (32, "StringMap"),
-  ("read_only_space", 0x03051): (41, "ConsOneByteStringMap"),
-  ("read_only_space", 0x03079): (33, "ConsStringMap"),
-  ("read_only_space", 0x030a1): (37, "ThinStringMap"),
-  ("read_only_space", 0x030c9): (35, "SlicedStringMap"),
-  ("read_only_space", 0x030f1): (43, "SlicedOneByteStringMap"),
-  ("read_only_space", 0x03119): (34, "ExternalStringMap"),
-  ("read_only_space", 0x03141): (42, "ExternalOneByteStringMap"),
-  ("read_only_space", 0x03169): (50, "UncachedExternalStringMap"),
-  ("read_only_space", 0x03191): (0, "InternalizedStringMap"),
-  ("read_only_space", 0x031b9): (2, "ExternalInternalizedStringMap"),
-  ("read_only_space", 0x031e1): (10, "ExternalOneByteInternalizedStringMap"),
-  ("read_only_space", 0x03209): (18, "UncachedExternalInternalizedStringMap"),
-  ("read_only_space", 0x03231): (26, "UncachedExternalOneByteInternalizedStringMap"),
-  ("read_only_space", 0x03259): (58, "UncachedExternalOneByteStringMap"),
-  ("read_only_space", 0x03281): (104, "SharedOneByteStringMap"),
-  ("read_only_space", 0x032a9): (96, "SharedStringMap"),
-  ("read_only_space", 0x032d1): (109, "SharedThinOneByteStringMap"),
-  ("read_only_space", 0x032f9): (101, "SharedThinStringMap"),
-  ("read_only_space", 0x03321): (96, "TwoByteSeqStringMigrationSentinelMap"),
-  ("read_only_space", 0x03349): (104, "OneByteSeqStringMigrationSentinelMap"),
-  ("read_only_space", 0x03371): (131, "SelfReferenceMarkerMap"),
-  ("read_only_space", 0x03399): (131, "BasicBlockCountersMarkerMap"),
-  ("read_only_space", 0x033dd): (147, "ArrayBoilerplateDescriptionMap"),
-  ("read_only_space", 0x034dd): (161, "InterceptorInfoMap"),
+  ("read_only_space", 0x02149): (248, "MetaMap"),
+  ("read_only_space", 0x02171): (131, "NullMap"),
+  ("read_only_space", 0x02199): (232, "StrongDescriptorArrayMap"),
+  ("read_only_space", 0x021c1): (261, "WeakArrayListMap"),
+  ("read_only_space", 0x02205): (157, "EnumCacheMap"),
+  ("read_only_space", 0x02239): (178, "FixedArrayMap"),
+  ("read_only_space", 0x02285): (8, "OneByteInternalizedStringMap"),
+  ("read_only_space", 0x022d1): (245, "FreeSpaceMap"),
+  ("read_only_space", 0x022f9): (244, "OnePointerFillerMap"),
+  ("read_only_space", 0x02321): (244, "TwoPointerFillerMap"),
+  ("read_only_space", 0x02349): (131, "UninitializedMap"),
+  ("read_only_space", 0x023c1): (131, "UndefinedMap"),
+  ("read_only_space", 0x02405): (130, "HeapNumberMap"),
+  ("read_only_space", 0x02439): (131, "TheHoleMap"),
+  ("read_only_space", 0x02499): (131, "BooleanMap"),
+  ("read_only_space", 0x0253d): (192, "ByteArrayMap"),
+  ("read_only_space", 0x02565): (178, "FixedCOWArrayMap"),
+  ("read_only_space", 0x0258d): (179, "HashTableMap"),
+  ("read_only_space", 0x025b5): (128, "SymbolMap"),
+  ("read_only_space", 0x025dd): (40, "OneByteStringMap"),
+  ("read_only_space", 0x02605): (254, "ScopeInfoMap"),
+  ("read_only_space", 0x0262d): (255, "SharedFunctionInfoMap"),
+  ("read_only_space", 0x02655): (238, "CodeMap"),
+  ("read_only_space", 0x0267d): (237, "CellMap"),
+  ("read_only_space", 0x026a5): (253, "GlobalPropertyCellMap"),
+  ("read_only_space", 0x026cd): (204, "ForeignMap"),
+  ("read_only_space", 0x026f5): (236, "TransitionArrayMap"),
+  ("read_only_space", 0x0271d): (45, "ThinOneByteStringMap"),
+  ("read_only_space", 0x02745): (243, "FeedbackVectorMap"),
+  ("read_only_space", 0x0277d): (131, "ArgumentsMarkerMap"),
+  ("read_only_space", 0x027dd): (131, "ExceptionMap"),
+  ("read_only_space", 0x02839): (131, "TerminationExceptionMap"),
+  ("read_only_space", 0x028a1): (131, "OptimizedOutMap"),
+  ("read_only_space", 0x02901): (131, "StaleRegisterMap"),
+  ("read_only_space", 0x02961): (191, "ScriptContextTableMap"),
+  ("read_only_space", 0x02989): (189, "ClosureFeedbackCellArrayMap"),
+  ("read_only_space", 0x029b1): (242, "FeedbackMetadataArrayMap"),
+  ("read_only_space", 0x029d9): (178, "ArrayListMap"),
+  ("read_only_space", 0x02a01): (129, "BigIntMap"),
+  ("read_only_space", 0x02a29): (190, "ObjectBoilerplateDescriptionMap"),
+  ("read_only_space", 0x02a51): (193, "BytecodeArrayMap"),
+  ("read_only_space", 0x02a79): (239, "CodeDataContainerMap"),
+  ("read_only_space", 0x02aa1): (240, "CoverageInfoMap"),
+  ("read_only_space", 0x02ac9): (194, "FixedDoubleArrayMap"),
+  ("read_only_space", 0x02af1): (181, "GlobalDictionaryMap"),
+  ("read_only_space", 0x02b19): (159, "ManyClosuresCellMap"),
+  ("read_only_space", 0x02b41): (249, "MegaDomHandlerMap"),
+  ("read_only_space", 0x02b69): (178, "ModuleInfoMap"),
+  ("read_only_space", 0x02b91): (182, "NameDictionaryMap"),
+  ("read_only_space", 0x02bb9): (159, "NoClosuresCellMap"),
+  ("read_only_space", 0x02be1): (184, "NumberDictionaryMap"),
+  ("read_only_space", 0x02c09): (159, "OneClosureCellMap"),
+  ("read_only_space", 0x02c31): (185, "OrderedHashMapMap"),
+  ("read_only_space", 0x02c59): (186, "OrderedHashSetMap"),
+  ("read_only_space", 0x02c81): (183, "NameToIndexHashTableMap"),
+  ("read_only_space", 0x02ca9): (187, "OrderedNameDictionaryMap"),
+  ("read_only_space", 0x02cd1): (251, "PreparseDataMap"),
+  ("read_only_space", 0x02cf9): (252, "PropertyArrayMap"),
+  ("read_only_space", 0x02d21): (153, "SideEffectCallHandlerInfoMap"),
+  ("read_only_space", 0x02d49): (153, "SideEffectFreeCallHandlerInfoMap"),
+  ("read_only_space", 0x02d71): (153, "NextCallSideEffectFreeCallHandlerInfoMap"),
+  ("read_only_space", 0x02d99): (188, "SimpleNumberDictionaryMap"),
+  ("read_only_space", 0x02dc1): (228, "SmallOrderedHashMapMap"),
+  ("read_only_space", 0x02de9): (229, "SmallOrderedHashSetMap"),
+  ("read_only_space", 0x02e11): (230, "SmallOrderedNameDictionaryMap"),
+  ("read_only_space", 0x02e39): (233, "SourceTextModuleMap"),
+  ("read_only_space", 0x02e61): (259, "SwissNameDictionaryMap"),
+  ("read_only_space", 0x02e89): (234, "SyntheticModuleMap"),
+  ("read_only_space", 0x02eb1): (260, "WasmApiFunctionRefMap"),
+  ("read_only_space", 0x02ed9): (222, "WasmCapiFunctionDataMap"),
+  ("read_only_space", 0x02f01): (223, "WasmExportedFunctionDataMap"),
+  ("read_only_space", 0x02f29): (205, "WasmInternalFunctionMap"),
+  ("read_only_space", 0x02f51): (224, "WasmJSFunctionDataMap"),
+  ("read_only_space", 0x02f79): (206, "WasmTypeInfoMap"),
+  ("read_only_space", 0x02fa1): (235, "WeakFixedArrayMap"),
+  ("read_only_space", 0x02fc9): (180, "EphemeronHashTableMap"),
+  ("read_only_space", 0x02ff1): (241, "EmbedderDataArrayMap"),
+  ("read_only_space", 0x03019): (262, "WeakCellMap"),
+  ("read_only_space", 0x03041): (32, "StringMap"),
+  ("read_only_space", 0x03069): (41, "ConsOneByteStringMap"),
+  ("read_only_space", 0x03091): (33, "ConsStringMap"),
+  ("read_only_space", 0x030b9): (37, "ThinStringMap"),
+  ("read_only_space", 0x030e1): (35, "SlicedStringMap"),
+  ("read_only_space", 0x03109): (43, "SlicedOneByteStringMap"),
+  ("read_only_space", 0x03131): (34, "ExternalStringMap"),
+  ("read_only_space", 0x03159): (42, "ExternalOneByteStringMap"),
+  ("read_only_space", 0x03181): (50, "UncachedExternalStringMap"),
+  ("read_only_space", 0x031a9): (0, "InternalizedStringMap"),
+  ("read_only_space", 0x031d1): (2, "ExternalInternalizedStringMap"),
+  ("read_only_space", 0x031f9): (10, "ExternalOneByteInternalizedStringMap"),
+  ("read_only_space", 0x03221): (18, "UncachedExternalInternalizedStringMap"),
+  ("read_only_space", 0x03249): (26, "UncachedExternalOneByteInternalizedStringMap"),
+  ("read_only_space", 0x03271): (58, "UncachedExternalOneByteStringMap"),
+  ("read_only_space", 0x03299): (104, "SharedOneByteStringMap"),
+  ("read_only_space", 0x032c1): (96, "SharedStringMap"),
+  ("read_only_space", 0x032e9): (109, "SharedThinOneByteStringMap"),
+  ("read_only_space", 0x03311): (101, "SharedThinStringMap"),
+  ("read_only_space", 0x03339): (96, "TwoByteSeqStringMigrationSentinelMap"),
+  ("read_only_space", 0x03361): (104, "OneByteSeqStringMigrationSentinelMap"),
+  ("read_only_space", 0x03389): (131, "SelfReferenceMarkerMap"),
+  ("read_only_space", 0x033b1): (131, "BasicBlockCountersMarkerMap"),
+  ("read_only_space", 0x033f5): (147, "ArrayBoilerplateDescriptionMap"),
+  ("read_only_space", 0x034f5): (161, "InterceptorInfoMap"),
   ("read_only_space", 0x05de5): (132, "PromiseFulfillReactionJobTaskMap"),
   ("read_only_space", 0x05e0d): (133, "PromiseRejectReactionJobTaskMap"),
   ("read_only_space", 0x05e35): (134, "CallableTaskMap"),
@@ -438,120 +438,118 @@ KNOWN_MAPS = {
   ("read_only_space", 0x0685d): (138, "StoreHandler1Map"),
   ("read_only_space", 0x06885): (138, "StoreHandler2Map"),
   ("read_only_space", 0x068ad): (138, "StoreHandler3Map"),
-  ("map_space", 0x02131): (1057, "ExternalMap"),
-  ("map_space", 0x02159): (2114, "JSMessageObjectMap"),
+  ("map_space", 0x02149): (1057, "ExternalMap"),
+  ("map_space", 0x02171): (2114, "JSMessageObjectMap"),
 }
 
 # List of known V8 objects.
 KNOWN_OBJECTS = {
-  ("read_only_space", 0x021d1): "EmptyWeakArrayList",
-  ("read_only_space", 0x021dd): "EmptyDescriptorArray",
-  ("read_only_space", 0x02215): "EmptyEnumCache",
-  ("read_only_space", 0x02249): "EmptyFixedArray",
-  ("read_only_space", 0x02251): "NullValue",
-  ("read_only_space", 0x02359): "UninitializedValue",
-  ("read_only_space", 0x023d1): "UndefinedValue",
-  ("read_only_space", 0x02415): "NanValue",
-  ("read_only_space", 0x02449): "TheHoleValue",
-  ("read_only_space", 0x02475): "HoleNanValue",
-  ("read_only_space", 0x024a9): "TrueValue",
-  ("read_only_space", 0x024e9): "FalseValue",
-  ("read_only_space", 0x02519): "empty_string",
-  ("read_only_space", 0x02755): "EmptyScopeInfo",
-  ("read_only_space", 0x0278d): "ArgumentsMarker",
-  ("read_only_space", 0x027ed): "Exception",
-  ("read_only_space", 0x02849): "TerminationException",
-  ("read_only_space", 0x028b1): "OptimizedOut",
-  ("read_only_space", 0x02911): "StaleRegister",
-  ("read_only_space", 0x033c1): "EmptyPropertyArray",
-  ("read_only_space", 0x033c9): "EmptyByteArray",
-  ("read_only_space", 0x033d1): "EmptyObjectBoilerplateDescription",
-  ("read_only_space", 0x03405): "EmptyArrayBoilerplateDescription",
-  ("read_only_space", 0x03411): "EmptyClosureFeedbackCellArray",
-  ("read_only_space", 0x03419): "EmptySlowElementDictionary",
-  ("read_only_space", 0x0343d): "EmptyOrderedHashMap",
-  ("read_only_space", 0x03451): "EmptyOrderedHashSet",
-  ("read_only_space", 0x03465): "EmptyFeedbackMetadata",
-  ("read_only_space", 0x03471): "EmptyPropertyDictionary",
-  ("read_only_space", 0x03499): "EmptyOrderedPropertyDictionary",
-  ("read_only_space", 0x034b1): "EmptySwissPropertyDictionary",
-  ("read_only_space", 0x03505): "NoOpInterceptorInfo",
-  ("read_only_space", 0x0352d): "EmptyWeakFixedArray",
-  ("read_only_space", 0x03535): "InfinityValue",
-  ("read_only_space", 0x03541): "MinusZeroValue",
-  ("read_only_space", 0x0354d): "MinusInfinityValue",
-  ("read_only_space", 0x03559): "SelfReferenceMarker",
-  ("read_only_space", 0x03599): "BasicBlockCountersMarker",
-  ("read_only_space", 0x035dd): "OffHeapTrampolineRelocationInfo",
-  ("read_only_space", 0x035e9): "TrampolineTrivialCodeDataContainer",
-  ("read_only_space", 0x035f5): "TrampolinePromiseRejectionCodeDataContainer",
+  ("read_only_space", 0x021e9): "EmptyWeakArrayList",
+  ("read_only_space", 0x021f5): "EmptyDescriptorArray",
+  ("read_only_space", 0x0222d): "EmptyEnumCache",
+  ("read_only_space", 0x02261): "EmptyFixedArray",
+  ("read_only_space", 0x02269): "NullValue",
+  ("read_only_space", 0x02371): "UninitializedValue",
+  ("read_only_space", 0x023e9): "UndefinedValue",
+  ("read_only_space", 0x0242d): "NanValue",
+  ("read_only_space", 0x02461): "TheHoleValue",
+  ("read_only_space", 0x0248d): "HoleNanValue",
+  ("read_only_space", 0x024c1): "TrueValue",
+  ("read_only_space", 0x02501): "FalseValue",
+  ("read_only_space", 0x02531): "empty_string",
+  ("read_only_space", 0x0276d): "EmptyScopeInfo",
+  ("read_only_space", 0x027a5): "ArgumentsMarker",
+  ("read_only_space", 0x02805): "Exception",
+  ("read_only_space", 0x02861): "TerminationException",
+  ("read_only_space", 0x028c9): "OptimizedOut",
+  ("read_only_space", 0x02929): "StaleRegister",
+  ("read_only_space", 0x033d9): "EmptyPropertyArray",
+  ("read_only_space", 0x033e1): "EmptyByteArray",
+  ("read_only_space", 0x033e9): "EmptyObjectBoilerplateDescription",
+  ("read_only_space", 0x0341d): "EmptyArrayBoilerplateDescription",
+  ("read_only_space", 0x03429): "EmptyClosureFeedbackCellArray",
+  ("read_only_space", 0x03431): "EmptySlowElementDictionary",
+  ("read_only_space", 0x03455): "EmptyOrderedHashMap",
+  ("read_only_space", 0x03469): "EmptyOrderedHashSet",
+  ("read_only_space", 0x0347d): "EmptyFeedbackMetadata",
+  ("read_only_space", 0x03489): "EmptyPropertyDictionary",
+  ("read_only_space", 0x034b1): "EmptyOrderedPropertyDictionary",
+  ("read_only_space", 0x034c9): "EmptySwissPropertyDictionary",
+  ("read_only_space", 0x0351d): "NoOpInterceptorInfo",
+  ("read_only_space", 0x03545): "EmptyWeakFixedArray",
+  ("read_only_space", 0x0354d): "InfinityValue",
+  ("read_only_space", 0x03559): "MinusZeroValue",
+  ("read_only_space", 0x03565): "MinusInfinityValue",
+  ("read_only_space", 0x03571): "SelfReferenceMarker",
+  ("read_only_space", 0x035b1): "BasicBlockCountersMarker",
+  ("read_only_space", 0x035f5): "OffHeapTrampolineRelocationInfo",
   ("read_only_space", 0x03601): "GlobalThisBindingScopeInfo",
   ("read_only_space", 0x03631): "EmptyFunctionScopeInfo",
   ("read_only_space", 0x03655): "NativeScopeInfo",
   ("read_only_space", 0x0366d): "HashSeed",
-  ("old_space", 0x04229): "ArgumentsIteratorAccessor",
-  ("old_space", 0x0426d): "ArrayLengthAccessor",
-  ("old_space", 0x042b1): "BoundFunctionLengthAccessor",
-  ("old_space", 0x042f5): "BoundFunctionNameAccessor",
-  ("old_space", 0x04339): "ErrorStackAccessor",
-  ("old_space", 0x0437d): "FunctionArgumentsAccessor",
-  ("old_space", 0x043c1): "FunctionCallerAccessor",
-  ("old_space", 0x04405): "FunctionNameAccessor",
-  ("old_space", 0x04449): "FunctionLengthAccessor",
-  ("old_space", 0x0448d): "FunctionPrototypeAccessor",
-  ("old_space", 0x044d1): "StringLengthAccessor",
-  ("old_space", 0x04515): "InvalidPrototypeValidityCell",
-  ("old_space", 0x0451d): "EmptyScript",
-  ("old_space", 0x0455d): "ManyClosuresCell",
-  ("old_space", 0x04569): "ArrayConstructorProtector",
-  ("old_space", 0x0457d): "NoElementsProtector",
-  ("old_space", 0x04591): "MegaDOMProtector",
-  ("old_space", 0x045a5): "IsConcatSpreadableProtector",
-  ("old_space", 0x045b9): "ArraySpeciesProtector",
-  ("old_space", 0x045cd): "TypedArraySpeciesProtector",
-  ("old_space", 0x045e1): "PromiseSpeciesProtector",
-  ("old_space", 0x045f5): "RegExpSpeciesProtector",
-  ("old_space", 0x04609): "StringLengthProtector",
-  ("old_space", 0x0461d): "ArrayIteratorProtector",
-  ("old_space", 0x04631): "ArrayBufferDetachingProtector",
-  ("old_space", 0x04645): "PromiseHookProtector",
-  ("old_space", 0x04659): "PromiseResolveProtector",
-  ("old_space", 0x0466d): "MapIteratorProtector",
-  ("old_space", 0x04681): "PromiseThenProtector",
-  ("old_space", 0x04695): "SetIteratorProtector",
-  ("old_space", 0x046a9): "StringIteratorProtector",
-  ("old_space", 0x046bd): "SingleCharacterStringCache",
-  ("old_space", 0x04ac5): "StringSplitCache",
-  ("old_space", 0x04ecd): "RegExpMultipleCache",
-  ("old_space", 0x052d5): "BuiltinsConstantsTable",
-  ("old_space", 0x056fd): "AsyncFunctionAwaitRejectSharedFun",
-  ("old_space", 0x05721): "AsyncFunctionAwaitResolveSharedFun",
-  ("old_space", 0x05745): "AsyncGeneratorAwaitRejectSharedFun",
-  ("old_space", 0x05769): "AsyncGeneratorAwaitResolveSharedFun",
-  ("old_space", 0x0578d): "AsyncGeneratorYieldResolveSharedFun",
-  ("old_space", 0x057b1): "AsyncGeneratorReturnResolveSharedFun",
-  ("old_space", 0x057d5): "AsyncGeneratorReturnClosedRejectSharedFun",
-  ("old_space", 0x057f9): "AsyncGeneratorReturnClosedResolveSharedFun",
-  ("old_space", 0x0581d): "AsyncIteratorValueUnwrapSharedFun",
-  ("old_space", 0x05841): "PromiseAllResolveElementSharedFun",
-  ("old_space", 0x05865): "PromiseAllSettledResolveElementSharedFun",
-  ("old_space", 0x05889): "PromiseAllSettledRejectElementSharedFun",
-  ("old_space", 0x058ad): "PromiseAnyRejectElementSharedFun",
-  ("old_space", 0x058d1): "PromiseCapabilityDefaultRejectSharedFun",
-  ("old_space", 0x058f5): "PromiseCapabilityDefaultResolveSharedFun",
-  ("old_space", 0x05919): "PromiseCatchFinallySharedFun",
-  ("old_space", 0x0593d): "PromiseGetCapabilitiesExecutorSharedFun",
-  ("old_space", 0x05961): "PromiseThenFinallySharedFun",
-  ("old_space", 0x05985): "PromiseThrowerFinallySharedFun",
-  ("old_space", 0x059a9): "PromiseValueThunkFinallySharedFun",
-  ("old_space", 0x059cd): "ProxyRevokeSharedFun",
+  ("old_space", 0x04241): "ArgumentsIteratorAccessor",
+  ("old_space", 0x04285): "ArrayLengthAccessor",
+  ("old_space", 0x042c9): "BoundFunctionLengthAccessor",
+  ("old_space", 0x0430d): "BoundFunctionNameAccessor",
+  ("old_space", 0x04351): "ErrorStackAccessor",
+  ("old_space", 0x04395): "FunctionArgumentsAccessor",
+  ("old_space", 0x043d9): "FunctionCallerAccessor",
+  ("old_space", 0x0441d): "FunctionNameAccessor",
+  ("old_space", 0x04461): "FunctionLengthAccessor",
+  ("old_space", 0x044a5): "FunctionPrototypeAccessor",
+  ("old_space", 0x044e9): "StringLengthAccessor",
+  ("old_space", 0x0452d): "InvalidPrototypeValidityCell",
+  ("old_space", 0x04535): "EmptyScript",
+  ("old_space", 0x04575): "ManyClosuresCell",
+  ("old_space", 0x04581): "ArrayConstructorProtector",
+  ("old_space", 0x04595): "NoElementsProtector",
+  ("old_space", 0x045a9): "MegaDOMProtector",
+  ("old_space", 0x045bd): "IsConcatSpreadableProtector",
+  ("old_space", 0x045d1): "ArraySpeciesProtector",
+  ("old_space", 0x045e5): "TypedArraySpeciesProtector",
+  ("old_space", 0x045f9): "PromiseSpeciesProtector",
+  ("old_space", 0x0460d): "RegExpSpeciesProtector",
+  ("old_space", 0x04621): "StringLengthProtector",
+  ("old_space", 0x04635): "ArrayIteratorProtector",
+  ("old_space", 0x04649): "ArrayBufferDetachingProtector",
+  ("old_space", 0x0465d): "PromiseHookProtector",
+  ("old_space", 0x04671): "PromiseResolveProtector",
+  ("old_space", 0x04685): "MapIteratorProtector",
+  ("old_space", 0x04699): "PromiseThenProtector",
+  ("old_space", 0x046ad): "SetIteratorProtector",
+  ("old_space", 0x046c1): "StringIteratorProtector",
+  ("old_space", 0x046d5): "SingleCharacterStringCache",
+  ("old_space", 0x04add): "StringSplitCache",
+  ("old_space", 0x04ee5): "RegExpMultipleCache",
+  ("old_space", 0x052ed): "BuiltinsConstantsTable",
+  ("old_space", 0x05715): "AsyncFunctionAwaitRejectSharedFun",
+  ("old_space", 0x05739): "AsyncFunctionAwaitResolveSharedFun",
+  ("old_space", 0x0575d): "AsyncGeneratorAwaitRejectSharedFun",
+  ("old_space", 0x05781): "AsyncGeneratorAwaitResolveSharedFun",
+  ("old_space", 0x057a5): "AsyncGeneratorYieldResolveSharedFun",
+  ("old_space", 0x057c9): "AsyncGeneratorReturnResolveSharedFun",
+  ("old_space", 0x057ed): "AsyncGeneratorReturnClosedRejectSharedFun",
+  ("old_space", 0x05811): "AsyncGeneratorReturnClosedResolveSharedFun",
+  ("old_space", 0x05835): "AsyncIteratorValueUnwrapSharedFun",
+  ("old_space", 0x05859): "PromiseAllResolveElementSharedFun",
+  ("old_space", 0x0587d): "PromiseAllSettledResolveElementSharedFun",
+  ("old_space", 0x058a1): "PromiseAllSettledRejectElementSharedFun",
+  ("old_space", 0x058c5): "PromiseAnyRejectElementSharedFun",
+  ("old_space", 0x058e9): "PromiseCapabilityDefaultRejectSharedFun",
+  ("old_space", 0x0590d): "PromiseCapabilityDefaultResolveSharedFun",
+  ("old_space", 0x05931): "PromiseCatchFinallySharedFun",
+  ("old_space", 0x05955): "PromiseGetCapabilitiesExecutorSharedFun",
+  ("old_space", 0x05979): "PromiseThenFinallySharedFun",
+  ("old_space", 0x0599d): "PromiseThrowerFinallySharedFun",
+  ("old_space", 0x059c1): "PromiseValueThunkFinallySharedFun",
+  ("old_space", 0x059e5): "ProxyRevokeSharedFun",
 }
 
 # Lower 32 bits of first page addresses for various heap spaces.
 HEAP_FIRST_PAGES = {
-  0x080c0000: "old_space",
-  0x08100000: "map_space",
-  0x08000000: "read_only_space",
+  0x000c0000: "old_space",
+  0x00100000: "map_space",
+  0x00000000: "read_only_space",
 }
 
 # List of known V8 Frame Markers.