1a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block// Copyright 2009 the V8 project authors. All rights reserved. 2b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch// Use of this source code is governed by a BSD-style license that can be 3b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch// found in the LICENSE file. 4b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 5b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch#include "src/global-handles.h" 6b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 7014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch#include "src/api.h" 862ed631aa0ff23db68a47fd423efa9c019ff2c9eBen Murdoch#include "src/cancelable-task.h" 962ed631aa0ff23db68a47fd423efa9c019ff2c9eBen Murdoch#include "src/objects-inl.h" 10014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch#include "src/v8.h" 11b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch#include "src/vm-state-inl.h" 12b0fe1620dcb4135ac3ab2d66ff93072373911299Ben Murdoch 13a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Blocknamespace v8 { 14a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Blocknamespace internal { 15a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block 1644f0eee88ff00398ff7f715fab053374d808c90dSteve Block 1744f0eee88ff00398ff7f715fab053374d808c90dSteve BlockObjectGroup::~ObjectGroup() { 18b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch if (info != NULL) info->Dispose(); 19b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch delete[] objects; 20b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch} 21b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 22b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 23b8a8cc1952d61a2f3a2568848933943a543b5d3eBen MurdochImplicitRefGroup::~ImplicitRefGroup() { 24b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch delete[] children; 2544f0eee88ff00398ff7f715fab053374d808c90dSteve Block} 2644f0eee88ff00398ff7f715fab053374d808c90dSteve Block 2744f0eee88ff00398ff7f715fab053374d808c90dSteve Block 283fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdochclass GlobalHandles::Node { 29a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block public: 303fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch // State transition diagram: 313fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch // FREE -> NORMAL <-> WEAK -> PENDING -> NEAR_DEATH -> { NORMAL, WEAK, FREE } 323fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch enum State { 33b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch FREE = 0, 34958fae7ec3f466955f8e5b50fa5b8d38b9e91675Emily Bernier NORMAL, // Normal global handle. 35958fae7ec3f466955f8e5b50fa5b8d38b9e91675Emily Bernier WEAK, // Flagged as weak but not yet finalized. 36958fae7ec3f466955f8e5b50fa5b8d38b9e91675Emily Bernier PENDING, // Has been recognized as only reachable by weak handles. 37958fae7ec3f466955f8e5b50fa5b8d38b9e91675Emily Bernier NEAR_DEATH, // Callback has informed the handle is near death. 38958fae7ec3f466955f8e5b50fa5b8d38b9e91675Emily Bernier NUMBER_OF_NODE_STATES 393fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch }; 40a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block 413fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch // Maps handle location (slot) to the containing node. 423fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch static Node* FromLocation(Object** location) { 43014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch DCHECK(offsetof(Node, object_) == 0); 443fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch return reinterpret_cast<Node*>(location); 45d0582a6c46733687d045e4188a1bcd0123c758a1Steve Block } 46d0582a6c46733687d045e4188a1bcd0123c758a1Steve Block 47b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch Node() { 48014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch DCHECK(offsetof(Node, class_id_) == Internals::kNodeClassIdOffset); 49014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch DCHECK(offsetof(Node, flags_) == Internals::kNodeFlagsOffset); 50b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch STATIC_ASSERT(static_cast<int>(NodeState::kMask) == 51b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch Internals::kNodeStateMask); 52b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch STATIC_ASSERT(WEAK == Internals::kNodeStateIsWeakValue); 53b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch STATIC_ASSERT(PENDING == Internals::kNodeStateIsPendingValue); 54b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch STATIC_ASSERT(NEAR_DEATH == Internals::kNodeStateIsNearDeathValue); 55b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch STATIC_ASSERT(static_cast<int>(IsIndependent::kShift) == 56b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch Internals::kNodeIsIndependentShift); 57014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch STATIC_ASSERT(static_cast<int>(IsActive::kShift) == 58014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch Internals::kNodeIsActiveShift); 59b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch } 60a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block 61b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch#ifdef ENABLE_HANDLE_ZAPPING 623fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch ~Node() { 633fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch // TODO(1428): if it's a weak handle we should have invoked its callback. 64a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block // Zap the values for eager trapping. 65b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch object_ = reinterpret_cast<Object*>(kGlobalHandleZapValue); 663fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch class_id_ = v8::HeapProfiler::kPersistentHandleNoClassId; 673fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch index_ = 0; 68b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch set_independent(false); 69c8c1d9e03f4babd16833b0f8ccf6aab5fa6e8c7aBen Murdoch set_active(false); 70b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch set_in_new_space_list(false); 71a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block parameter_or_next_free_.next_free = NULL; 72b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch weak_callback_ = NULL; 733fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch } 74a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block#endif 753fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch 763fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch void Initialize(int index, Node** first_free) { 77014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch object_ = reinterpret_cast<Object*>(kGlobalHandleZapValue); 783fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch index_ = static_cast<uint8_t>(index); 79b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch DCHECK(static_cast<int>(index_) == index); 80b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch set_state(FREE); 81b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch set_in_new_space_list(false); 823fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch parameter_or_next_free_.next_free = *first_free; 833fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch *first_free = this; 84a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block } 85a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block 86b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch void Acquire(Object* object) { 87b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch DCHECK(state() == FREE); 883fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch object_ = object; 893fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch class_id_ = v8::HeapProfiler::kPersistentHandleNoClassId; 90b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch set_independent(false); 91c8c1d9e03f4babd16833b0f8ccf6aab5fa6e8c7aBen Murdoch set_active(false); 92b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch set_state(NORMAL); 933fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch parameter_or_next_free_.parameter = NULL; 94b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch weak_callback_ = NULL; 95b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch IncreaseBlockUses(); 963fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch } 973fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch 98958fae7ec3f466955f8e5b50fa5b8d38b9e91675Emily Bernier void Zap() { 99958fae7ec3f466955f8e5b50fa5b8d38b9e91675Emily Bernier DCHECK(IsInUse()); 100958fae7ec3f466955f8e5b50fa5b8d38b9e91675Emily Bernier // Zap the values for eager trapping. 101958fae7ec3f466955f8e5b50fa5b8d38b9e91675Emily Bernier object_ = reinterpret_cast<Object*>(kGlobalHandleZapValue); 102958fae7ec3f466955f8e5b50fa5b8d38b9e91675Emily Bernier } 103958fae7ec3f466955f8e5b50fa5b8d38b9e91675Emily Bernier 104b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch void Release() { 105958fae7ec3f466955f8e5b50fa5b8d38b9e91675Emily Bernier DCHECK(IsInUse()); 106b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch set_state(FREE); 107b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch // Zap the values for eager trapping. 108b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch object_ = reinterpret_cast<Object*>(kGlobalHandleZapValue); 109b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch class_id_ = v8::HeapProfiler::kPersistentHandleNoClassId; 110b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch set_independent(false); 111c8c1d9e03f4babd16833b0f8ccf6aab5fa6e8c7aBen Murdoch set_active(false); 112b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch weak_callback_ = NULL; 113b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch DecreaseBlockUses(); 1143fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch } 1153fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch 1163fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch // Object slot accessors. 1173fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch Object* object() const { return object_; } 1183fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch Object** location() { return &object_; } 1193fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch Handle<Object> handle() { return Handle<Object>(location()); } 1203fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch 1213fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch // Wrapper class ID accessors. 1223fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch bool has_wrapper_class_id() const { 1233fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch return class_id_ != v8::HeapProfiler::kPersistentHandleNoClassId; 124a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block } 125b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 1263fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch uint16_t wrapper_class_id() const { return class_id_; } 127b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 128b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch // State and flag accessors. 129b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 130b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch State state() const { 131b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch return NodeState::decode(flags_); 132b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch } 133b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch void set_state(State state) { 134b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch flags_ = NodeState::update(flags_, state); 1353fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch } 1363fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch 137b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch bool is_independent() { 138b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch return IsIndependent::decode(flags_); 139b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch } 140b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch void set_independent(bool v) { 141b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch flags_ = IsIndependent::update(flags_, v); 142b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch } 1433fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch 144014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch bool is_active() { 145014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch return IsActive::decode(flags_); 146014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch } 147014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch void set_active(bool v) { 148014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch flags_ = IsActive::update(flags_, v); 149014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch } 150014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch 151b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch bool is_in_new_space_list() { 152b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch return IsInNewSpaceList::decode(flags_); 153b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch } 154b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch void set_in_new_space_list(bool v) { 155b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch flags_ = IsInNewSpaceList::update(flags_, v); 156b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch } 1573fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch 158958fae7ec3f466955f8e5b50fa5b8d38b9e91675Emily Bernier WeaknessType weakness_type() const { 159958fae7ec3f466955f8e5b50fa5b8d38b9e91675Emily Bernier return NodeWeaknessType::decode(flags_); 160958fae7ec3f466955f8e5b50fa5b8d38b9e91675Emily Bernier } 161958fae7ec3f466955f8e5b50fa5b8d38b9e91675Emily Bernier void set_weakness_type(WeaknessType weakness_type) { 162958fae7ec3f466955f8e5b50fa5b8d38b9e91675Emily Bernier flags_ = NodeWeaknessType::update(flags_, weakness_type); 163958fae7ec3f466955f8e5b50fa5b8d38b9e91675Emily Bernier } 164958fae7ec3f466955f8e5b50fa5b8d38b9e91675Emily Bernier 1653fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch bool IsNearDeath() const { 1663fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch // Check for PENDING to ensure correct answer when processing callbacks. 167b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch return state() == PENDING || state() == NEAR_DEATH; 1683fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch } 1693fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch 170b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch bool IsWeak() const { return state() == WEAK; } 1713fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch 172958fae7ec3f466955f8e5b50fa5b8d38b9e91675Emily Bernier bool IsInUse() const { return state() != FREE; } 173958fae7ec3f466955f8e5b50fa5b8d38b9e91675Emily Bernier 174bcf72ee8e3b26f1d0726869c7ddb3921c68b09a8Ben Murdoch bool IsPendingPhantomCallback() const { 175bcf72ee8e3b26f1d0726869c7ddb3921c68b09a8Ben Murdoch return state() == PENDING && 176bcf72ee8e3b26f1d0726869c7ddb3921c68b09a8Ben Murdoch (weakness_type() == PHANTOM_WEAK || 177bcf72ee8e3b26f1d0726869c7ddb3921c68b09a8Ben Murdoch weakness_type() == PHANTOM_WEAK_2_INTERNAL_FIELDS); 178bcf72ee8e3b26f1d0726869c7ddb3921c68b09a8Ben Murdoch } 179bcf72ee8e3b26f1d0726869c7ddb3921c68b09a8Ben Murdoch 180bcf72ee8e3b26f1d0726869c7ddb3921c68b09a8Ben Murdoch bool IsPendingPhantomResetHandle() const { 181bcf72ee8e3b26f1d0726869c7ddb3921c68b09a8Ben Murdoch return state() == PENDING && weakness_type() == PHANTOM_WEAK_RESET_HANDLE; 182bcf72ee8e3b26f1d0726869c7ddb3921c68b09a8Ben Murdoch } 183bcf72ee8e3b26f1d0726869c7ddb3921c68b09a8Ben Murdoch 184014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch bool IsRetainer() const { 185014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch return state() != FREE && 186bcf72ee8e3b26f1d0726869c7ddb3921c68b09a8Ben Murdoch !(state() == NEAR_DEATH && weakness_type() != FINALIZER_WEAK); 187014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch } 188a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block 189b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch bool IsStrongRetainer() const { return state() == NORMAL; } 1903fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch 1913fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch bool IsWeakRetainer() const { 192014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch return state() == WEAK || state() == PENDING || 193bcf72ee8e3b26f1d0726869c7ddb3921c68b09a8Ben Murdoch (state() == NEAR_DEATH && weakness_type() == FINALIZER_WEAK); 1943fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch } 1953fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch 1963fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch void MarkPending() { 197b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch DCHECK(state() == WEAK); 198b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch set_state(PENDING); 1993fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch } 2003fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch 2013fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch // Independent flag accessors. 2023fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch void MarkIndependent() { 203958fae7ec3f466955f8e5b50fa5b8d38b9e91675Emily Bernier DCHECK(IsInUse()); 204b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch set_independent(true); 2053fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch } 2063fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch 2073fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch // Callback accessor. 208b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch // TODO(svenpanne) Re-enable or nuke later. 209b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch // WeakReferenceCallback callback() { return callback_; } 2103fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch 2113fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch // Callback parameter accessors. 2123fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch void set_parameter(void* parameter) { 213958fae7ec3f466955f8e5b50fa5b8d38b9e91675Emily Bernier DCHECK(IsInUse()); 2143fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch parameter_or_next_free_.parameter = parameter; 2153fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch } 2163fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch void* parameter() const { 217958fae7ec3f466955f8e5b50fa5b8d38b9e91675Emily Bernier DCHECK(IsInUse()); 2183fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch return parameter_or_next_free_.parameter; 2193fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch } 220a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block 221a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block // Accessors for next free node in the free list. 222a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block Node* next_free() { 223b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch DCHECK(state() == FREE); 224a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block return parameter_or_next_free_.next_free; 225a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block } 226a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block void set_next_free(Node* value) { 227b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch DCHECK(state() == FREE); 228a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block parameter_or_next_free_.next_free = value; 229a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block } 230a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block 231014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch void MakeWeak(void* parameter, 232014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch WeakCallbackInfo<void>::Callback phantom_callback, 233014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch v8::WeakCallbackType type) { 234014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch DCHECK(phantom_callback != nullptr); 235958fae7ec3f466955f8e5b50fa5b8d38b9e91675Emily Bernier DCHECK(IsInUse()); 236014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch CHECK_NE(object_, reinterpret_cast<Object*>(kGlobalHandleZapValue)); 237958fae7ec3f466955f8e5b50fa5b8d38b9e91675Emily Bernier set_state(WEAK); 238014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch switch (type) { 239014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch case v8::WeakCallbackType::kParameter: 240014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch set_weakness_type(PHANTOM_WEAK); 241014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch break; 242014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch case v8::WeakCallbackType::kInternalFields: 243bcf72ee8e3b26f1d0726869c7ddb3921c68b09a8Ben Murdoch set_weakness_type(PHANTOM_WEAK_2_INTERNAL_FIELDS); 244bcf72ee8e3b26f1d0726869c7ddb3921c68b09a8Ben Murdoch break; 245bcf72ee8e3b26f1d0726869c7ddb3921c68b09a8Ben Murdoch case v8::WeakCallbackType::kFinalizer: 246bcf72ee8e3b26f1d0726869c7ddb3921c68b09a8Ben Murdoch set_weakness_type(FINALIZER_WEAK); 247bcf72ee8e3b26f1d0726869c7ddb3921c68b09a8Ben Murdoch break; 248958fae7ec3f466955f8e5b50fa5b8d38b9e91675Emily Bernier } 249014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch set_parameter(parameter); 250bcf72ee8e3b26f1d0726869c7ddb3921c68b09a8Ben Murdoch weak_callback_ = phantom_callback; 251bcf72ee8e3b26f1d0726869c7ddb3921c68b09a8Ben Murdoch } 252bcf72ee8e3b26f1d0726869c7ddb3921c68b09a8Ben Murdoch 253bcf72ee8e3b26f1d0726869c7ddb3921c68b09a8Ben Murdoch void MakeWeak(Object*** location_addr) { 254bcf72ee8e3b26f1d0726869c7ddb3921c68b09a8Ben Murdoch DCHECK(IsInUse()); 255bcf72ee8e3b26f1d0726869c7ddb3921c68b09a8Ben Murdoch CHECK_NE(object_, reinterpret_cast<Object*>(kGlobalHandleZapValue)); 256bcf72ee8e3b26f1d0726869c7ddb3921c68b09a8Ben Murdoch set_state(WEAK); 257bcf72ee8e3b26f1d0726869c7ddb3921c68b09a8Ben Murdoch set_weakness_type(PHANTOM_WEAK_RESET_HANDLE); 258bcf72ee8e3b26f1d0726869c7ddb3921c68b09a8Ben Murdoch set_parameter(location_addr); 259bcf72ee8e3b26f1d0726869c7ddb3921c68b09a8Ben Murdoch weak_callback_ = nullptr; 260958fae7ec3f466955f8e5b50fa5b8d38b9e91675Emily Bernier } 261958fae7ec3f466955f8e5b50fa5b8d38b9e91675Emily Bernier 262b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch void* ClearWeakness() { 263958fae7ec3f466955f8e5b50fa5b8d38b9e91675Emily Bernier DCHECK(IsInUse()); 264b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch void* p = parameter(); 265b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch set_state(NORMAL); 266a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block set_parameter(NULL); 267b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch return p; 268a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block } 269a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block 270958fae7ec3f466955f8e5b50fa5b8d38b9e91675Emily Bernier void CollectPhantomCallbackData( 271014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch Isolate* isolate, 272014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch List<PendingPhantomCallback>* pending_phantom_callbacks) { 273014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch DCHECK(weakness_type() == PHANTOM_WEAK || 274014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch weakness_type() == PHANTOM_WEAK_2_INTERNAL_FIELDS); 275014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch DCHECK(state() == PENDING); 276bcf72ee8e3b26f1d0726869c7ddb3921c68b09a8Ben Murdoch DCHECK(weak_callback_ != nullptr); 277014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch 278014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch void* internal_fields[v8::kInternalFieldsInWeakCallback] = {nullptr, 279014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch nullptr}; 280014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch if (weakness_type() != PHANTOM_WEAK && object()->IsJSObject()) { 281014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch auto jsobject = JSObject::cast(object()); 282014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch int field_count = jsobject->GetInternalFieldCount(); 283014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch for (int i = 0; i < v8::kInternalFieldsInWeakCallback; ++i) { 284014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch if (field_count == i) break; 285014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch auto field = jsobject->GetInternalField(i); 286014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch if (field->IsSmi()) internal_fields[i] = field; 287958fae7ec3f466955f8e5b50fa5b8d38b9e91675Emily Bernier } 288958fae7ec3f466955f8e5b50fa5b8d38b9e91675Emily Bernier } 289014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch 290014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch // Zap with something dangerous. 291014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch *location() = reinterpret_cast<Object*>(0x6057ca11); 292014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch 293014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch typedef v8::WeakCallbackInfo<void> Data; 294014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch auto callback = reinterpret_cast<Data::Callback>(weak_callback_); 295014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch pending_phantom_callbacks->Add( 296014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch PendingPhantomCallback(this, callback, parameter(), internal_fields)); 297014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch DCHECK(IsInUse()); 298014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch set_state(NEAR_DEATH); 299958fae7ec3f466955f8e5b50fa5b8d38b9e91675Emily Bernier } 300958fae7ec3f466955f8e5b50fa5b8d38b9e91675Emily Bernier 301bcf72ee8e3b26f1d0726869c7ddb3921c68b09a8Ben Murdoch void ResetPhantomHandle() { 302bcf72ee8e3b26f1d0726869c7ddb3921c68b09a8Ben Murdoch DCHECK(weakness_type() == PHANTOM_WEAK_RESET_HANDLE); 303bcf72ee8e3b26f1d0726869c7ddb3921c68b09a8Ben Murdoch DCHECK(state() == PENDING); 304bcf72ee8e3b26f1d0726869c7ddb3921c68b09a8Ben Murdoch DCHECK(weak_callback_ == nullptr); 305bcf72ee8e3b26f1d0726869c7ddb3921c68b09a8Ben Murdoch Object*** handle = reinterpret_cast<Object***>(parameter()); 306bcf72ee8e3b26f1d0726869c7ddb3921c68b09a8Ben Murdoch *handle = nullptr; 307bcf72ee8e3b26f1d0726869c7ddb3921c68b09a8Ben Murdoch Release(); 308bcf72ee8e3b26f1d0726869c7ddb3921c68b09a8Ben Murdoch } 309bcf72ee8e3b26f1d0726869c7ddb3921c68b09a8Ben Murdoch 310b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch bool PostGarbageCollectionProcessing(Isolate* isolate) { 311014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch // Handles only weak handles (not phantom) that are dying. 312b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch if (state() != Node::PENDING) return false; 313b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch if (weak_callback_ == NULL) { 314b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch Release(); 31550ef84f5fad2def87d3fbc737bec4a32711fdef4Kristian Monsen return false; 31650ef84f5fad2def87d3fbc737bec4a32711fdef4Kristian Monsen } 317b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch set_state(NEAR_DEATH); 318a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block 319958fae7ec3f466955f8e5b50fa5b8d38b9e91675Emily Bernier // Check that we are not passing a finalized external string to 320958fae7ec3f466955f8e5b50fa5b8d38b9e91675Emily Bernier // the callback. 321958fae7ec3f466955f8e5b50fa5b8d38b9e91675Emily Bernier DCHECK(!object_->IsExternalOneByteString() || 322958fae7ec3f466955f8e5b50fa5b8d38b9e91675Emily Bernier ExternalOneByteString::cast(object_)->resource() != NULL); 323958fae7ec3f466955f8e5b50fa5b8d38b9e91675Emily Bernier DCHECK(!object_->IsExternalTwoByteString() || 324958fae7ec3f466955f8e5b50fa5b8d38b9e91675Emily Bernier ExternalTwoByteString::cast(object_)->resource() != NULL); 325bcf72ee8e3b26f1d0726869c7ddb3921c68b09a8Ben Murdoch if (weakness_type() != FINALIZER_WEAK) { 326bcf72ee8e3b26f1d0726869c7ddb3921c68b09a8Ben Murdoch return false; 327bcf72ee8e3b26f1d0726869c7ddb3921c68b09a8Ben Murdoch } 328014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch 329958fae7ec3f466955f8e5b50fa5b8d38b9e91675Emily Bernier // Leaving V8. 330958fae7ec3f466955f8e5b50fa5b8d38b9e91675Emily Bernier VMState<EXTERNAL> vmstate(isolate); 331958fae7ec3f466955f8e5b50fa5b8d38b9e91675Emily Bernier HandleScope handle_scope(isolate); 332bcf72ee8e3b26f1d0726869c7ddb3921c68b09a8Ben Murdoch void* internal_fields[v8::kInternalFieldsInWeakCallback] = {nullptr, 333bcf72ee8e3b26f1d0726869c7ddb3921c68b09a8Ben Murdoch nullptr}; 334bcf72ee8e3b26f1d0726869c7ddb3921c68b09a8Ben Murdoch v8::WeakCallbackInfo<void> data(reinterpret_cast<v8::Isolate*>(isolate), 335bcf72ee8e3b26f1d0726869c7ddb3921c68b09a8Ben Murdoch parameter(), internal_fields, nullptr); 336958fae7ec3f466955f8e5b50fa5b8d38b9e91675Emily Bernier weak_callback_(data); 337958fae7ec3f466955f8e5b50fa5b8d38b9e91675Emily Bernier 3383ef787dbeca8a5fb1086949cda830dccee07bfbdBen Murdoch // Absence of explicit cleanup or revival of weak handle 33950ef84f5fad2def87d3fbc737bec4a32711fdef4Kristian Monsen // in most of the cases would lead to memory leak. 340b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch CHECK(state() != NEAR_DEATH); 341a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block return true; 342a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block } 343a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block 344b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch inline GlobalHandles* GetGlobalHandles(); 345b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 3463fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch private: 3473fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch inline NodeBlock* FindBlock(); 348b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch inline void IncreaseBlockUses(); 349b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch inline void DecreaseBlockUses(); 3503fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch 3513fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch // Storage for object pointer. 3523fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch // Placed first to avoid offset computation. 3533fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch Object* object_; 354a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block 3553fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch // Next word stores class_id, index, state, and independent. 3563fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch // Note: the most aligned fields should go first. 3573fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch 3583fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch // Wrapper class ID. 35944f0eee88ff00398ff7f715fab053374d808c90dSteve Block uint16_t class_id_; 36044f0eee88ff00398ff7f715fab053374d808c90dSteve Block 3613fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch // Index in the containing handle block. 3623fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch uint8_t index_; 3633fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch 364b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch // This stores three flags (independent, partially_dependent and 365b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch // in_new_space_list) and a State. 366958fae7ec3f466955f8e5b50fa5b8d38b9e91675Emily Bernier class NodeState : public BitField<State, 0, 3> {}; 367958fae7ec3f466955f8e5b50fa5b8d38b9e91675Emily Bernier class IsIndependent : public BitField<bool, 3, 1> {}; 368014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch // The following two fields are mutually exclusive 369014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch class IsActive : public BitField<bool, 4, 1> {}; 370958fae7ec3f466955f8e5b50fa5b8d38b9e91675Emily Bernier class IsInNewSpaceList : public BitField<bool, 5, 1> {}; 371958fae7ec3f466955f8e5b50fa5b8d38b9e91675Emily Bernier class NodeWeaknessType : public BitField<WeaknessType, 6, 2> {}; 372a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block 373b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch uint8_t flags_; 374257744e915dfc84d6d07a6b2accf8402d9ffc708Ben Murdoch 375b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch // Handle specific callback - might be a weak reference in disguise. 376bcf72ee8e3b26f1d0726869c7ddb3921c68b09a8Ben Murdoch WeakCallbackInfo<void>::Callback weak_callback_; 3773fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch 3783fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch // Provided data for callback. In FREE state, this is used for 379a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block // the free list link. 380a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block union { 381a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block void* parameter; 382a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block Node* next_free; 383a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block } parameter_or_next_free_; 384a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block 3853fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch DISALLOW_COPY_AND_ASSIGN(Node); 3863fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch}; 3873fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch 388a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block 3893fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdochclass GlobalHandles::NodeBlock { 390a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block public: 3913fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch static const int kSize = 256; 392a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block 393b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch explicit NodeBlock(GlobalHandles* global_handles, NodeBlock* next) 394b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch : next_(next), 395b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch used_nodes_(0), 396b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch next_used_(NULL), 397b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch prev_used_(NULL), 398b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch global_handles_(global_handles) {} 399a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block 4003fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch void PutNodesOnFreeList(Node** first_free) { 4013fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch for (int i = kSize - 1; i >= 0; --i) { 4023fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch nodes_[i].Initialize(i, first_free); 403d0582a6c46733687d045e4188a1bcd0123c758a1Steve Block } 4043fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch } 405d0582a6c46733687d045e4188a1bcd0123c758a1Steve Block 4063fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch Node* node_at(int index) { 407b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch DCHECK(0 <= index && index < kSize); 4083fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch return &nodes_[index]; 4093fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch } 4103fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch 411b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch void IncreaseUses() { 412b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch DCHECK(used_nodes_ < kSize); 4133fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch if (used_nodes_++ == 0) { 414b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch NodeBlock* old_first = global_handles_->first_used_block_; 415b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch global_handles_->first_used_block_ = this; 4163fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch next_used_ = old_first; 4173fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch prev_used_ = NULL; 4183fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch if (old_first == NULL) return; 4193fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch old_first->prev_used_ = this; 420bb769b257e753aafcbd96767abb2abc645eaa20cBen Murdoch } 4213fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch } 422bb769b257e753aafcbd96767abb2abc645eaa20cBen Murdoch 423b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch void DecreaseUses() { 424b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch DCHECK(used_nodes_ > 0); 4253fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch if (--used_nodes_ == 0) { 4263fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch if (next_used_ != NULL) next_used_->prev_used_ = prev_used_; 4273fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch if (prev_used_ != NULL) prev_used_->next_used_ = next_used_; 428b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch if (this == global_handles_->first_used_block_) { 429b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch global_handles_->first_used_block_ = next_used_; 430d0582a6c46733687d045e4188a1bcd0123c758a1Steve Block } 431d0582a6c46733687d045e4188a1bcd0123c758a1Steve Block } 4323fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch } 433d0582a6c46733687d045e4188a1bcd0123c758a1Steve Block 434b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch GlobalHandles* global_handles() { return global_handles_; } 435b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 4363fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch // Next block in the list of all blocks. 4373fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch NodeBlock* next() const { return next_; } 438d0582a6c46733687d045e4188a1bcd0123c758a1Steve Block 4393fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch // Next/previous block in the list of blocks with used nodes. 4403fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch NodeBlock* next_used() const { return next_used_; } 4413fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch NodeBlock* prev_used() const { return prev_used_; } 4423fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch 4433fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch private: 4443fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch Node nodes_[kSize]; 4453fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch NodeBlock* const next_; 4463fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch int used_nodes_; 4473fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch NodeBlock* next_used_; 4483fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch NodeBlock* prev_used_; 449b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch GlobalHandles* global_handles_; 4503fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch}; 4513fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch 4523fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch 453b8a8cc1952d61a2f3a2568848933943a543b5d3eBen MurdochGlobalHandles* GlobalHandles::Node::GetGlobalHandles() { 454b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch return FindBlock()->global_handles(); 455b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch} 456b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 457b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 4583fb3ca8c7ca439d408449a395897395c0faae8d1Ben MurdochGlobalHandles::NodeBlock* GlobalHandles::Node::FindBlock() { 4593fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch intptr_t ptr = reinterpret_cast<intptr_t>(this); 4603fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch ptr = ptr - index_ * sizeof(Node); 4613fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch NodeBlock* block = reinterpret_cast<NodeBlock*>(ptr); 462b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch DCHECK(block->node_at(index_) == this); 4633fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch return block; 4643fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch} 4653fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch 4663fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch 467b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdochvoid GlobalHandles::Node::IncreaseBlockUses() { 468b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch NodeBlock* node_block = FindBlock(); 469b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch node_block->IncreaseUses(); 470b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch GlobalHandles* global_handles = node_block->global_handles(); 471b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch global_handles->isolate()->counters()->global_handles()->Increment(); 472b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch global_handles->number_of_global_handles_++; 4733fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch} 4743fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch 4753fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch 476b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdochvoid GlobalHandles::Node::DecreaseBlockUses() { 477b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch NodeBlock* node_block = FindBlock(); 478b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch GlobalHandles* global_handles = node_block->global_handles(); 479b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch parameter_or_next_free_.next_free = global_handles->first_free_; 480b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch global_handles->first_free_ = this; 481b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch node_block->DecreaseUses(); 482b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch global_handles->isolate()->counters()->global_handles()->Decrement(); 483b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch global_handles->number_of_global_handles_--; 4843fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch} 4853fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch 4863fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch 4873fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdochclass GlobalHandles::NodeIterator { 4883fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch public: 4893fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch explicit NodeIterator(GlobalHandles* global_handles) 4903fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch : block_(global_handles->first_used_block_), 4913fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch index_(0) {} 4923fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch 4933fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch bool done() const { return block_ == NULL; } 4943fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch 4953fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch Node* node() const { 496b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch DCHECK(!done()); 4973fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch return block_->node_at(index_); 4983fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch } 499d0582a6c46733687d045e4188a1bcd0123c758a1Steve Block 5003fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch void Advance() { 501b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch DCHECK(!done()); 5023fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch if (++index_ < NodeBlock::kSize) return; 5033fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch index_ = 0; 5043fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch block_ = block_->next_used(); 5053fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch } 5063fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch 5073fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch private: 5083fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch NodeBlock* block_; 5093fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch int index_; 5103fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch 5113fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch DISALLOW_COPY_AND_ASSIGN(NodeIterator); 512d0582a6c46733687d045e4188a1bcd0123c758a1Steve Block}; 513d0582a6c46733687d045e4188a1bcd0123c758a1Steve Block 514014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdochclass GlobalHandles::PendingPhantomCallbacksSecondPassTask 515014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch : public v8::internal::CancelableTask { 516014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch public: 517014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch // Takes ownership of the contents of pending_phantom_callbacks, leaving it in 518014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch // the same state it would be after a call to Clear(). 519014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch PendingPhantomCallbacksSecondPassTask( 520014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch List<PendingPhantomCallback>* pending_phantom_callbacks, Isolate* isolate) 521014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch : CancelableTask(isolate) { 522014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch pending_phantom_callbacks_.Swap(pending_phantom_callbacks); 523014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch } 524014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch 525014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch void RunInternal() override { 526bcf72ee8e3b26f1d0726869c7ddb3921c68b09a8Ben Murdoch TRACE_EVENT0("v8", "V8.GCPhantomHandleProcessingCallback"); 527014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch isolate()->heap()->CallGCPrologueCallbacks( 528014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch GCType::kGCTypeProcessWeakCallbacks, kNoGCCallbackFlags); 529014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch InvokeSecondPassPhantomCallbacks(&pending_phantom_callbacks_, isolate()); 530014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch isolate()->heap()->CallGCEpilogueCallbacks( 531014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch GCType::kGCTypeProcessWeakCallbacks, kNoGCCallbackFlags); 532014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch } 533014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch 534014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch private: 535014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch List<PendingPhantomCallback> pending_phantom_callbacks_; 536014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch 537014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch DISALLOW_COPY_AND_ASSIGN(PendingPhantomCallbacksSecondPassTask); 538014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch}; 539014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch 54044f0eee88ff00398ff7f715fab053374d808c90dSteve BlockGlobalHandles::GlobalHandles(Isolate* isolate) 54144f0eee88ff00398ff7f715fab053374d808c90dSteve Block : isolate_(isolate), 5423ef787dbeca8a5fb1086949cda830dccee07bfbdBen Murdoch number_of_global_handles_(0), 5433fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch first_block_(NULL), 5443fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch first_used_block_(NULL), 54544f0eee88ff00398ff7f715fab053374d808c90dSteve Block first_free_(NULL), 546b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch post_gc_processing_count_(0), 547bcf72ee8e3b26f1d0726869c7ddb3921c68b09a8Ben Murdoch number_of_phantom_handle_resets_(0), 548b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch object_group_connections_(kObjectGroupConnectionsCapacity) {} 54944f0eee88ff00398ff7f715fab053374d808c90dSteve Block 55044f0eee88ff00398ff7f715fab053374d808c90dSteve BlockGlobalHandles::~GlobalHandles() { 5513fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch NodeBlock* block = first_block_; 5523fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch while (block != NULL) { 5533fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch NodeBlock* tmp = block->next(); 5543fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch delete block; 5553fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch block = tmp; 5563fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch } 5573fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch first_block_ = NULL; 55844f0eee88ff00398ff7f715fab053374d808c90dSteve Block} 559d0582a6c46733687d045e4188a1bcd0123c758a1Steve Block 560d0582a6c46733687d045e4188a1bcd0123c758a1Steve Block 561a7e24c173cf37484693b9abb38e494fa7bd7baebSteve BlockHandle<Object> GlobalHandles::Create(Object* value) { 5623fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch if (first_free_ == NULL) { 563b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch first_block_ = new NodeBlock(this, first_block_); 5643fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch first_block_->PutNodesOnFreeList(&first_free_); 5653fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch } 566b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch DCHECK(first_free_ != NULL); 5673fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch // Take the first node in the free list. 5683fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch Node* result = first_free_; 5693fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch first_free_ = result->next_free(); 570b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch result->Acquire(value); 5713fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch if (isolate_->heap()->InNewSpace(value) && 5723fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch !result->is_in_new_space_list()) { 5733fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch new_space_nodes_.Add(result); 5743fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch result->set_in_new_space_list(true); 575a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block } 576a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block return result->handle(); 577a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block} 578a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block 579a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block 580b8a8cc1952d61a2f3a2568848933943a543b5d3eBen MurdochHandle<Object> GlobalHandles::CopyGlobal(Object** location) { 581b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch DCHECK(location != NULL); 582b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch return Node::FromLocation(location)->GetGlobalHandles()->Create(*location); 583b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch} 584b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 585b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 586a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Blockvoid GlobalHandles::Destroy(Object** location) { 587b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch if (location != NULL) Node::FromLocation(location)->Release(); 588a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block} 589a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block 590a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block 591014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdochtypedef v8::WeakCallbackInfo<void>::Callback GenericCallback; 592958fae7ec3f466955f8e5b50fa5b8d38b9e91675Emily Bernier 593958fae7ec3f466955f8e5b50fa5b8d38b9e91675Emily Bernier 594014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdochvoid GlobalHandles::MakeWeak(Object** location, void* parameter, 595014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch GenericCallback phantom_callback, 596014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch v8::WeakCallbackType type) { 597014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch Node::FromLocation(location)->MakeWeak(parameter, phantom_callback, type); 598958fae7ec3f466955f8e5b50fa5b8d38b9e91675Emily Bernier} 599958fae7ec3f466955f8e5b50fa5b8d38b9e91675Emily Bernier 600bcf72ee8e3b26f1d0726869c7ddb3921c68b09a8Ben Murdochvoid GlobalHandles::MakeWeak(Object*** location_addr) { 601bcf72ee8e3b26f1d0726869c7ddb3921c68b09a8Ben Murdoch Node::FromLocation(*location_addr)->MakeWeak(location_addr); 602bcf72ee8e3b26f1d0726869c7ddb3921c68b09a8Ben Murdoch} 603958fae7ec3f466955f8e5b50fa5b8d38b9e91675Emily Bernier 604b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdochvoid* GlobalHandles::ClearWeakness(Object** location) { 605b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch return Node::FromLocation(location)->ClearWeakness(); 606a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block} 607a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block 608a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block 609257744e915dfc84d6d07a6b2accf8402d9ffc708Ben Murdochvoid GlobalHandles::MarkIndependent(Object** location) { 6103fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch Node::FromLocation(location)->MarkIndependent(); 611257744e915dfc84d6d07a6b2accf8402d9ffc708Ben Murdoch} 612257744e915dfc84d6d07a6b2accf8402d9ffc708Ben Murdoch 613b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdochbool GlobalHandles::IsIndependent(Object** location) { 614b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch return Node::FromLocation(location)->is_independent(); 615a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block} 616a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block 617a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block 618b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdochbool GlobalHandles::IsNearDeath(Object** location) { 619b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch return Node::FromLocation(location)->IsNearDeath(); 62044f0eee88ff00398ff7f715fab053374d808c90dSteve Block} 62144f0eee88ff00398ff7f715fab053374d808c90dSteve Block 62244f0eee88ff00398ff7f715fab053374d808c90dSteve Block 623b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdochbool GlobalHandles::IsWeak(Object** location) { 624b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch return Node::FromLocation(location)->IsWeak(); 6253fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch} 6263fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch 627f91f0611dbaf29ca0f1d4aecb357ce243a19d2faBen MurdochDISABLE_CFI_PERF 628b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdochvoid GlobalHandles::IterateWeakRoots(ObjectVisitor* v) { 6293fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch for (NodeIterator it(this); !it.done(); it.Advance()) { 630958fae7ec3f466955f8e5b50fa5b8d38b9e91675Emily Bernier Node* node = it.node(); 631958fae7ec3f466955f8e5b50fa5b8d38b9e91675Emily Bernier if (node->IsWeakRetainer()) { 632014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch // Pending weak phantom handles die immediately. Everything else survives. 633bcf72ee8e3b26f1d0726869c7ddb3921c68b09a8Ben Murdoch if (node->IsPendingPhantomResetHandle()) { 634bcf72ee8e3b26f1d0726869c7ddb3921c68b09a8Ben Murdoch node->ResetPhantomHandle(); 635bcf72ee8e3b26f1d0726869c7ddb3921c68b09a8Ben Murdoch ++number_of_phantom_handle_resets_; 636bcf72ee8e3b26f1d0726869c7ddb3921c68b09a8Ben Murdoch } else if (node->IsPendingPhantomCallback()) { 637bcf72ee8e3b26f1d0726869c7ddb3921c68b09a8Ben Murdoch node->CollectPhantomCallbackData(isolate(), 638bcf72ee8e3b26f1d0726869c7ddb3921c68b09a8Ben Murdoch &pending_phantom_callbacks_); 639958fae7ec3f466955f8e5b50fa5b8d38b9e91675Emily Bernier } else { 640958fae7ec3f466955f8e5b50fa5b8d38b9e91675Emily Bernier v->VisitPointer(node->location()); 641958fae7ec3f466955f8e5b50fa5b8d38b9e91675Emily Bernier } 642958fae7ec3f466955f8e5b50fa5b8d38b9e91675Emily Bernier } 643257744e915dfc84d6d07a6b2accf8402d9ffc708Ben Murdoch } 644257744e915dfc84d6d07a6b2accf8402d9ffc708Ben Murdoch} 645257744e915dfc84d6d07a6b2accf8402d9ffc708Ben Murdoch 646257744e915dfc84d6d07a6b2accf8402d9ffc708Ben Murdoch 6473fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdochvoid GlobalHandles::IdentifyWeakHandles(WeakSlotCallback f) { 6483fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch for (NodeIterator it(this); !it.done(); it.Advance()) { 6493fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch if (it.node()->IsWeak() && f(it.node()->location())) { 6503fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch it.node()->MarkPending(); 651a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block } 652a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block } 653a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block} 654a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block 655a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block 6563fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdochvoid GlobalHandles::IterateNewSpaceStrongAndDependentRoots(ObjectVisitor* v) { 6573fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch for (int i = 0; i < new_space_nodes_.length(); ++i) { 6583fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch Node* node = new_space_nodes_[i]; 659c8c1d9e03f4babd16833b0f8ccf6aab5fa6e8c7aBen Murdoch if (node->IsStrongRetainer() || 660c8c1d9e03f4babd16833b0f8ccf6aab5fa6e8c7aBen Murdoch (node->IsWeakRetainer() && !node->is_independent() && 661c8c1d9e03f4babd16833b0f8ccf6aab5fa6e8c7aBen Murdoch node->is_active())) { 662c8c1d9e03f4babd16833b0f8ccf6aab5fa6e8c7aBen Murdoch v->VisitPointer(node->location()); 6633ce2e2076e8e3e60cf1810eec160ea2d8557e9e7Steve Block } 6643ce2e2076e8e3e60cf1810eec160ea2d8557e9e7Steve Block } 6653ce2e2076e8e3e60cf1810eec160ea2d8557e9e7Steve Block} 6663ce2e2076e8e3e60cf1810eec160ea2d8557e9e7Steve Block 6673ce2e2076e8e3e60cf1810eec160ea2d8557e9e7Steve Block 6683fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdochvoid GlobalHandles::IdentifyNewSpaceWeakIndependentHandles( 6693fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch WeakSlotCallbackWithHeap f) { 6703fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch for (int i = 0; i < new_space_nodes_.length(); ++i) { 6713fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch Node* node = new_space_nodes_[i]; 672b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch DCHECK(node->is_in_new_space_list()); 673c8c1d9e03f4babd16833b0f8ccf6aab5fa6e8c7aBen Murdoch if (node->is_independent() && node->IsWeak() && 674c8c1d9e03f4babd16833b0f8ccf6aab5fa6e8c7aBen Murdoch f(isolate_->heap(), node->location())) { 6753fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch node->MarkPending(); 676a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block } 677a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block } 678a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block} 679a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block 680a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block 6813fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdochvoid GlobalHandles::IterateNewSpaceWeakIndependentRoots(ObjectVisitor* v) { 6823fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch for (int i = 0; i < new_space_nodes_.length(); ++i) { 6833fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch Node* node = new_space_nodes_[i]; 684b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch DCHECK(node->is_in_new_space_list()); 685c8c1d9e03f4babd16833b0f8ccf6aab5fa6e8c7aBen Murdoch if (node->is_independent() && node->IsWeakRetainer()) { 686014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch // Pending weak phantom handles die immediately. Everything else survives. 687bcf72ee8e3b26f1d0726869c7ddb3921c68b09a8Ben Murdoch if (node->IsPendingPhantomResetHandle()) { 688bcf72ee8e3b26f1d0726869c7ddb3921c68b09a8Ben Murdoch node->ResetPhantomHandle(); 689bcf72ee8e3b26f1d0726869c7ddb3921c68b09a8Ben Murdoch ++number_of_phantom_handle_resets_; 690bcf72ee8e3b26f1d0726869c7ddb3921c68b09a8Ben Murdoch } else if (node->IsPendingPhantomCallback()) { 691014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch node->CollectPhantomCallbackData(isolate(), 692014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch &pending_phantom_callbacks_); 693014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch } else { 694958fae7ec3f466955f8e5b50fa5b8d38b9e91675Emily Bernier v->VisitPointer(node->location()); 695014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch } 696014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch } 697014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch } 698014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch} 699014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch 700014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch 701014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdochvoid GlobalHandles::IdentifyWeakUnmodifiedObjects( 702014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch WeakSlotCallback is_unmodified) { 703014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch for (int i = 0; i < new_space_nodes_.length(); ++i) { 704014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch Node* node = new_space_nodes_[i]; 705014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch if (node->IsWeak() && !is_unmodified(node->location())) { 706014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch node->set_active(true); 707014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch } 708014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch } 709014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch} 710014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch 711014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch 712014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdochvoid GlobalHandles::MarkNewSpaceWeakUnmodifiedObjectsPending( 713014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch WeakSlotCallbackWithHeap is_unscavenged) { 714014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch for (int i = 0; i < new_space_nodes_.length(); ++i) { 715014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch Node* node = new_space_nodes_[i]; 716014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch DCHECK(node->is_in_new_space_list()); 717014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch if ((node->is_independent() || !node->is_active()) && node->IsWeak() && 718014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch is_unscavenged(isolate_->heap(), node->location())) { 719014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch node->MarkPending(); 720014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch } 721014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch } 722014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch} 723014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch 72462ed631aa0ff23db68a47fd423efa9c019ff2c9eBen Murdochtemplate <GlobalHandles::IterationMode mode> 725014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdochvoid GlobalHandles::IterateNewSpaceWeakUnmodifiedRoots(ObjectVisitor* v) { 726014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch for (int i = 0; i < new_space_nodes_.length(); ++i) { 727014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch Node* node = new_space_nodes_[i]; 728014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch DCHECK(node->is_in_new_space_list()); 729014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch if ((node->is_independent() || !node->is_active()) && 730014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch node->IsWeakRetainer()) { 731014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch // Pending weak phantom handles die immediately. Everything else survives. 732bcf72ee8e3b26f1d0726869c7ddb3921c68b09a8Ben Murdoch if (node->IsPendingPhantomResetHandle()) { 73362ed631aa0ff23db68a47fd423efa9c019ff2c9eBen Murdoch if (mode == IterationMode::HANDLE_PHANTOM_NODES || 73462ed631aa0ff23db68a47fd423efa9c019ff2c9eBen Murdoch mode == IterationMode::HANDLE_PHANTOM_NODES_VISIT_OTHERS) { 73562ed631aa0ff23db68a47fd423efa9c019ff2c9eBen Murdoch node->ResetPhantomHandle(); 73662ed631aa0ff23db68a47fd423efa9c019ff2c9eBen Murdoch ++number_of_phantom_handle_resets_; 73762ed631aa0ff23db68a47fd423efa9c019ff2c9eBen Murdoch } 738bcf72ee8e3b26f1d0726869c7ddb3921c68b09a8Ben Murdoch } else if (node->IsPendingPhantomCallback()) { 73962ed631aa0ff23db68a47fd423efa9c019ff2c9eBen Murdoch if (mode == IterationMode::HANDLE_PHANTOM_NODES || 74062ed631aa0ff23db68a47fd423efa9c019ff2c9eBen Murdoch mode == IterationMode::HANDLE_PHANTOM_NODES_VISIT_OTHERS) { 74162ed631aa0ff23db68a47fd423efa9c019ff2c9eBen Murdoch node->CollectPhantomCallbackData(isolate(), 74262ed631aa0ff23db68a47fd423efa9c019ff2c9eBen Murdoch &pending_phantom_callbacks_); 74362ed631aa0ff23db68a47fd423efa9c019ff2c9eBen Murdoch } 744958fae7ec3f466955f8e5b50fa5b8d38b9e91675Emily Bernier } else { 74562ed631aa0ff23db68a47fd423efa9c019ff2c9eBen Murdoch if (mode == IterationMode::VISIT_OTHERS || 74662ed631aa0ff23db68a47fd423efa9c019ff2c9eBen Murdoch mode == IterationMode::HANDLE_PHANTOM_NODES_VISIT_OTHERS) { 74762ed631aa0ff23db68a47fd423efa9c019ff2c9eBen Murdoch v->VisitPointer(node->location()); 74862ed631aa0ff23db68a47fd423efa9c019ff2c9eBen Murdoch } 749958fae7ec3f466955f8e5b50fa5b8d38b9e91675Emily Bernier } 750257744e915dfc84d6d07a6b2accf8402d9ffc708Ben Murdoch } 751257744e915dfc84d6d07a6b2accf8402d9ffc708Ben Murdoch } 752257744e915dfc84d6d07a6b2accf8402d9ffc708Ben Murdoch} 753257744e915dfc84d6d07a6b2accf8402d9ffc708Ben Murdoch 75462ed631aa0ff23db68a47fd423efa9c019ff2c9eBen Murdochtemplate void GlobalHandles::IterateNewSpaceWeakUnmodifiedRoots< 75562ed631aa0ff23db68a47fd423efa9c019ff2c9eBen Murdoch GlobalHandles::HANDLE_PHANTOM_NODES>(ObjectVisitor* v); 75662ed631aa0ff23db68a47fd423efa9c019ff2c9eBen Murdoch 75762ed631aa0ff23db68a47fd423efa9c019ff2c9eBen Murdochtemplate void GlobalHandles::IterateNewSpaceWeakUnmodifiedRoots< 75862ed631aa0ff23db68a47fd423efa9c019ff2c9eBen Murdoch GlobalHandles::VISIT_OTHERS>(ObjectVisitor* v); 75962ed631aa0ff23db68a47fd423efa9c019ff2c9eBen Murdoch 76062ed631aa0ff23db68a47fd423efa9c019ff2c9eBen Murdochtemplate void GlobalHandles::IterateNewSpaceWeakUnmodifiedRoots< 76162ed631aa0ff23db68a47fd423efa9c019ff2c9eBen Murdoch GlobalHandles::HANDLE_PHANTOM_NODES_VISIT_OTHERS>(ObjectVisitor* v); 762257744e915dfc84d6d07a6b2accf8402d9ffc708Ben Murdoch 763f91f0611dbaf29ca0f1d4aecb357ce243a19d2faBen MurdochDISABLE_CFI_PERF 764b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdochbool GlobalHandles::IterateObjectGroups(ObjectVisitor* v, 765b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch WeakSlotCallbackWithHeap can_skip) { 766b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch ComputeObjectGroupsAndImplicitReferences(); 767b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch int last = 0; 768b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch bool any_group_was_visited = false; 769b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch for (int i = 0; i < object_groups_.length(); i++) { 770b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch ObjectGroup* entry = object_groups_.at(i); 771b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch DCHECK(entry != NULL); 772b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 773b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch Object*** objects = entry->objects; 774b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch bool group_should_be_visited = false; 775b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch for (size_t j = 0; j < entry->length; j++) { 776b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch Object* object = *objects[j]; 777b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch if (object->IsHeapObject()) { 778b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch if (!can_skip(isolate_->heap(), &object)) { 779b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch group_should_be_visited = true; 780b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch break; 781b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch } 782b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch } 783b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch } 784b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 785b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch if (!group_should_be_visited) { 786b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch object_groups_[last++] = entry; 787b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch continue; 788b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch } 789b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 790b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch // An object in the group requires visiting, so iterate over all 791b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch // objects in the group. 792b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch for (size_t j = 0; j < entry->length; ++j) { 793b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch Object* object = *objects[j]; 794b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch if (object->IsHeapObject()) { 795b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch v->VisitPointer(&object); 796b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch any_group_was_visited = true; 797b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch } 798b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch } 799b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 800b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch // Once the entire group has been iterated over, set the object 801b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch // group to NULL so it won't be processed again. 802b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch delete entry; 803b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch object_groups_.at(i) = NULL; 804b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch } 805b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch object_groups_.Rewind(last); 806b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch return any_group_was_visited; 807b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch} 808b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 8093b9bc31999c9787eb726ecdbfd5796bfdec32a18Ben Murdochnamespace { 8103b9bc31999c9787eb726ecdbfd5796bfdec32a18Ben Murdoch// Traces the information about object groups and implicit ref groups given by 8113b9bc31999c9787eb726ecdbfd5796bfdec32a18Ben Murdoch// the embedder to the V8 during each gc prologue. 8123b9bc31999c9787eb726ecdbfd5796bfdec32a18Ben Murdochclass ObjectGroupsTracer { 8133b9bc31999c9787eb726ecdbfd5796bfdec32a18Ben Murdoch public: 8143b9bc31999c9787eb726ecdbfd5796bfdec32a18Ben Murdoch explicit ObjectGroupsTracer(Isolate* isolate); 8153b9bc31999c9787eb726ecdbfd5796bfdec32a18Ben Murdoch void Print(); 8163b9bc31999c9787eb726ecdbfd5796bfdec32a18Ben Murdoch 8173b9bc31999c9787eb726ecdbfd5796bfdec32a18Ben Murdoch private: 8183b9bc31999c9787eb726ecdbfd5796bfdec32a18Ben Murdoch void PrintObjectGroup(ObjectGroup* group); 8193b9bc31999c9787eb726ecdbfd5796bfdec32a18Ben Murdoch void PrintImplicitRefGroup(ImplicitRefGroup* group); 8203b9bc31999c9787eb726ecdbfd5796bfdec32a18Ben Murdoch void PrintObject(Object* object); 8213b9bc31999c9787eb726ecdbfd5796bfdec32a18Ben Murdoch void PrintConstructor(JSObject* js_object); 8223b9bc31999c9787eb726ecdbfd5796bfdec32a18Ben Murdoch void PrintInternalFields(JSObject* js_object); 8233b9bc31999c9787eb726ecdbfd5796bfdec32a18Ben Murdoch Isolate* isolate_; 8243b9bc31999c9787eb726ecdbfd5796bfdec32a18Ben Murdoch DISALLOW_COPY_AND_ASSIGN(ObjectGroupsTracer); 8253b9bc31999c9787eb726ecdbfd5796bfdec32a18Ben Murdoch}; 8263b9bc31999c9787eb726ecdbfd5796bfdec32a18Ben Murdoch 8273b9bc31999c9787eb726ecdbfd5796bfdec32a18Ben MurdochObjectGroupsTracer::ObjectGroupsTracer(Isolate* isolate) : isolate_(isolate) {} 8283b9bc31999c9787eb726ecdbfd5796bfdec32a18Ben Murdoch 8293b9bc31999c9787eb726ecdbfd5796bfdec32a18Ben Murdochvoid ObjectGroupsTracer::Print() { 8303b9bc31999c9787eb726ecdbfd5796bfdec32a18Ben Murdoch GlobalHandles* global_handles = isolate_->global_handles(); 8313b9bc31999c9787eb726ecdbfd5796bfdec32a18Ben Murdoch 8323b9bc31999c9787eb726ecdbfd5796bfdec32a18Ben Murdoch PrintIsolate(isolate_, "### Tracing object groups:\n"); 8333b9bc31999c9787eb726ecdbfd5796bfdec32a18Ben Murdoch 8343b9bc31999c9787eb726ecdbfd5796bfdec32a18Ben Murdoch for (auto group : *(global_handles->object_groups())) { 8353b9bc31999c9787eb726ecdbfd5796bfdec32a18Ben Murdoch PrintObjectGroup(group); 8363b9bc31999c9787eb726ecdbfd5796bfdec32a18Ben Murdoch } 8373b9bc31999c9787eb726ecdbfd5796bfdec32a18Ben Murdoch for (auto group : *(global_handles->implicit_ref_groups())) { 8383b9bc31999c9787eb726ecdbfd5796bfdec32a18Ben Murdoch PrintImplicitRefGroup(group); 8393b9bc31999c9787eb726ecdbfd5796bfdec32a18Ben Murdoch } 8403b9bc31999c9787eb726ecdbfd5796bfdec32a18Ben Murdoch 8413b9bc31999c9787eb726ecdbfd5796bfdec32a18Ben Murdoch PrintIsolate(isolate_, "### Tracing object groups finished.\n"); 8423b9bc31999c9787eb726ecdbfd5796bfdec32a18Ben Murdoch} 8433b9bc31999c9787eb726ecdbfd5796bfdec32a18Ben Murdoch 8443b9bc31999c9787eb726ecdbfd5796bfdec32a18Ben Murdochvoid ObjectGroupsTracer::PrintObject(Object* object) { 8453b9bc31999c9787eb726ecdbfd5796bfdec32a18Ben Murdoch if (object->IsJSObject()) { 8463b9bc31999c9787eb726ecdbfd5796bfdec32a18Ben Murdoch JSObject* js_object = JSObject::cast(object); 8473b9bc31999c9787eb726ecdbfd5796bfdec32a18Ben Murdoch 8483b9bc31999c9787eb726ecdbfd5796bfdec32a18Ben Murdoch PrintF("{ constructor_name: "); 8493b9bc31999c9787eb726ecdbfd5796bfdec32a18Ben Murdoch PrintConstructor(js_object); 8503b9bc31999c9787eb726ecdbfd5796bfdec32a18Ben Murdoch PrintF(", hidden_fields: [ "); 8513b9bc31999c9787eb726ecdbfd5796bfdec32a18Ben Murdoch PrintInternalFields(js_object); 8523b9bc31999c9787eb726ecdbfd5796bfdec32a18Ben Murdoch PrintF(" ] }\n"); 8533b9bc31999c9787eb726ecdbfd5796bfdec32a18Ben Murdoch } else { 85413e2dadd00298019ed862f2b2fc5068bba730bcfBen Murdoch PrintF("object of unexpected type: %p\n", static_cast<void*>(object)); 8553b9bc31999c9787eb726ecdbfd5796bfdec32a18Ben Murdoch } 8563b9bc31999c9787eb726ecdbfd5796bfdec32a18Ben Murdoch} 8573b9bc31999c9787eb726ecdbfd5796bfdec32a18Ben Murdoch 8583b9bc31999c9787eb726ecdbfd5796bfdec32a18Ben Murdochvoid ObjectGroupsTracer::PrintConstructor(JSObject* js_object) { 8593b9bc31999c9787eb726ecdbfd5796bfdec32a18Ben Murdoch Object* maybe_constructor = js_object->map()->GetConstructor(); 8603b9bc31999c9787eb726ecdbfd5796bfdec32a18Ben Murdoch if (maybe_constructor->IsJSFunction()) { 8613b9bc31999c9787eb726ecdbfd5796bfdec32a18Ben Murdoch JSFunction* constructor = JSFunction::cast(maybe_constructor); 8623b9bc31999c9787eb726ecdbfd5796bfdec32a18Ben Murdoch String* name = String::cast(constructor->shared()->name()); 8633b9bc31999c9787eb726ecdbfd5796bfdec32a18Ben Murdoch if (name->length() == 0) name = constructor->shared()->inferred_name(); 8643b9bc31999c9787eb726ecdbfd5796bfdec32a18Ben Murdoch 8653b9bc31999c9787eb726ecdbfd5796bfdec32a18Ben Murdoch PrintF("%s", name->ToCString().get()); 86613e2dadd00298019ed862f2b2fc5068bba730bcfBen Murdoch } else if (maybe_constructor->IsNull(isolate_)) { 8673b9bc31999c9787eb726ecdbfd5796bfdec32a18Ben Murdoch if (js_object->IsOddball()) { 8683b9bc31999c9787eb726ecdbfd5796bfdec32a18Ben Murdoch PrintF("<oddball>"); 8693b9bc31999c9787eb726ecdbfd5796bfdec32a18Ben Murdoch } else { 8703b9bc31999c9787eb726ecdbfd5796bfdec32a18Ben Murdoch PrintF("<null>"); 8713b9bc31999c9787eb726ecdbfd5796bfdec32a18Ben Murdoch } 8723b9bc31999c9787eb726ecdbfd5796bfdec32a18Ben Murdoch } else { 8733b9bc31999c9787eb726ecdbfd5796bfdec32a18Ben Murdoch UNREACHABLE(); 8743b9bc31999c9787eb726ecdbfd5796bfdec32a18Ben Murdoch } 8753b9bc31999c9787eb726ecdbfd5796bfdec32a18Ben Murdoch} 8763b9bc31999c9787eb726ecdbfd5796bfdec32a18Ben Murdoch 8773b9bc31999c9787eb726ecdbfd5796bfdec32a18Ben Murdochvoid ObjectGroupsTracer::PrintInternalFields(JSObject* js_object) { 8783b9bc31999c9787eb726ecdbfd5796bfdec32a18Ben Murdoch for (int i = 0; i < js_object->GetInternalFieldCount(); ++i) { 8793b9bc31999c9787eb726ecdbfd5796bfdec32a18Ben Murdoch if (i != 0) { 8803b9bc31999c9787eb726ecdbfd5796bfdec32a18Ben Murdoch PrintF(", "); 8813b9bc31999c9787eb726ecdbfd5796bfdec32a18Ben Murdoch } 88213e2dadd00298019ed862f2b2fc5068bba730bcfBen Murdoch PrintF("%p", static_cast<void*>(js_object->GetInternalField(i))); 8833b9bc31999c9787eb726ecdbfd5796bfdec32a18Ben Murdoch } 8843b9bc31999c9787eb726ecdbfd5796bfdec32a18Ben Murdoch} 8853b9bc31999c9787eb726ecdbfd5796bfdec32a18Ben Murdoch 8863b9bc31999c9787eb726ecdbfd5796bfdec32a18Ben Murdochvoid ObjectGroupsTracer::PrintObjectGroup(ObjectGroup* group) { 887bcf72ee8e3b26f1d0726869c7ddb3921c68b09a8Ben Murdoch PrintIsolate(isolate_, "ObjectGroup (size: %" PRIuS ")\n", group->length); 8883b9bc31999c9787eb726ecdbfd5796bfdec32a18Ben Murdoch Object*** objects = group->objects; 8893b9bc31999c9787eb726ecdbfd5796bfdec32a18Ben Murdoch 8903b9bc31999c9787eb726ecdbfd5796bfdec32a18Ben Murdoch for (size_t i = 0; i < group->length; ++i) { 8913b9bc31999c9787eb726ecdbfd5796bfdec32a18Ben Murdoch PrintIsolate(isolate_, " - Member: "); 8923b9bc31999c9787eb726ecdbfd5796bfdec32a18Ben Murdoch PrintObject(*objects[i]); 8933b9bc31999c9787eb726ecdbfd5796bfdec32a18Ben Murdoch } 8943b9bc31999c9787eb726ecdbfd5796bfdec32a18Ben Murdoch} 8953b9bc31999c9787eb726ecdbfd5796bfdec32a18Ben Murdoch 8963b9bc31999c9787eb726ecdbfd5796bfdec32a18Ben Murdochvoid ObjectGroupsTracer::PrintImplicitRefGroup(ImplicitRefGroup* group) { 897bcf72ee8e3b26f1d0726869c7ddb3921c68b09a8Ben Murdoch PrintIsolate(isolate_, "ImplicitRefGroup (children count: %" PRIuS ")\n", 8983b9bc31999c9787eb726ecdbfd5796bfdec32a18Ben Murdoch group->length); 8993b9bc31999c9787eb726ecdbfd5796bfdec32a18Ben Murdoch PrintIsolate(isolate_, " - Parent: "); 9003b9bc31999c9787eb726ecdbfd5796bfdec32a18Ben Murdoch PrintObject(*(group->parent)); 9013b9bc31999c9787eb726ecdbfd5796bfdec32a18Ben Murdoch 9023b9bc31999c9787eb726ecdbfd5796bfdec32a18Ben Murdoch Object*** children = group->children; 9033b9bc31999c9787eb726ecdbfd5796bfdec32a18Ben Murdoch for (size_t i = 0; i < group->length; ++i) { 9043b9bc31999c9787eb726ecdbfd5796bfdec32a18Ben Murdoch PrintIsolate(isolate_, " - Child: "); 9053b9bc31999c9787eb726ecdbfd5796bfdec32a18Ben Murdoch PrintObject(*children[i]); 9063b9bc31999c9787eb726ecdbfd5796bfdec32a18Ben Murdoch } 9073b9bc31999c9787eb726ecdbfd5796bfdec32a18Ben Murdoch} 9083b9bc31999c9787eb726ecdbfd5796bfdec32a18Ben Murdoch 9093b9bc31999c9787eb726ecdbfd5796bfdec32a18Ben Murdoch} // namespace 9103b9bc31999c9787eb726ecdbfd5796bfdec32a18Ben Murdoch 9113b9bc31999c9787eb726ecdbfd5796bfdec32a18Ben Murdochvoid GlobalHandles::PrintObjectGroups() { 9123b9bc31999c9787eb726ecdbfd5796bfdec32a18Ben Murdoch ObjectGroupsTracer(isolate_).Print(); 9133b9bc31999c9787eb726ecdbfd5796bfdec32a18Ben Murdoch} 914b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 915014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdochvoid GlobalHandles::InvokeSecondPassPhantomCallbacks( 916014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch List<PendingPhantomCallback>* callbacks, Isolate* isolate) { 917014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch while (callbacks->length() != 0) { 918014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch auto callback = callbacks->RemoveLast(); 919014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch DCHECK(callback.node() == nullptr); 920014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch // Fire second pass callback 921014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch callback.Invoke(isolate); 922014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch } 923014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch} 924014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch 925014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch 926958fae7ec3f466955f8e5b50fa5b8d38b9e91675Emily Bernierint GlobalHandles::PostScavengeProcessing( 927958fae7ec3f466955f8e5b50fa5b8d38b9e91675Emily Bernier const int initial_post_gc_processing_count) { 928b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch int freed_nodes = 0; 929958fae7ec3f466955f8e5b50fa5b8d38b9e91675Emily Bernier for (int i = 0; i < new_space_nodes_.length(); ++i) { 930958fae7ec3f466955f8e5b50fa5b8d38b9e91675Emily Bernier Node* node = new_space_nodes_[i]; 931958fae7ec3f466955f8e5b50fa5b8d38b9e91675Emily Bernier DCHECK(node->is_in_new_space_list()); 932958fae7ec3f466955f8e5b50fa5b8d38b9e91675Emily Bernier if (!node->IsRetainer()) { 933958fae7ec3f466955f8e5b50fa5b8d38b9e91675Emily Bernier // Free nodes do not have weak callbacks. Do not use them to compute 934958fae7ec3f466955f8e5b50fa5b8d38b9e91675Emily Bernier // the freed_nodes. 935958fae7ec3f466955f8e5b50fa5b8d38b9e91675Emily Bernier continue; 936a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block } 937014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch // Skip dependent or unmodified handles. Their weak callbacks might expect 938014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch // to be 939958fae7ec3f466955f8e5b50fa5b8d38b9e91675Emily Bernier // called between two global garbage collection callbacks which 940958fae7ec3f466955f8e5b50fa5b8d38b9e91675Emily Bernier // are not called for minor collections. 941014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch if (!node->is_independent() && (node->is_active())) { 942014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch node->set_active(false); 943014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch continue; 944014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch } 945014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch node->set_active(false); 946014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch 947958fae7ec3f466955f8e5b50fa5b8d38b9e91675Emily Bernier if (node->PostGarbageCollectionProcessing(isolate_)) { 948958fae7ec3f466955f8e5b50fa5b8d38b9e91675Emily Bernier if (initial_post_gc_processing_count != post_gc_processing_count_) { 949958fae7ec3f466955f8e5b50fa5b8d38b9e91675Emily Bernier // Weak callback triggered another GC and another round of 950958fae7ec3f466955f8e5b50fa5b8d38b9e91675Emily Bernier // PostGarbageCollection processing. The current node might 951958fae7ec3f466955f8e5b50fa5b8d38b9e91675Emily Bernier // have been deleted in that round, so we need to bail out (or 952958fae7ec3f466955f8e5b50fa5b8d38b9e91675Emily Bernier // restart the processing). 953958fae7ec3f466955f8e5b50fa5b8d38b9e91675Emily Bernier return freed_nodes; 9543fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch } 955958fae7ec3f466955f8e5b50fa5b8d38b9e91675Emily Bernier } 956958fae7ec3f466955f8e5b50fa5b8d38b9e91675Emily Bernier if (!node->IsRetainer()) { 957958fae7ec3f466955f8e5b50fa5b8d38b9e91675Emily Bernier freed_nodes++; 958958fae7ec3f466955f8e5b50fa5b8d38b9e91675Emily Bernier } 959958fae7ec3f466955f8e5b50fa5b8d38b9e91675Emily Bernier } 960958fae7ec3f466955f8e5b50fa5b8d38b9e91675Emily Bernier return freed_nodes; 961958fae7ec3f466955f8e5b50fa5b8d38b9e91675Emily Bernier} 962958fae7ec3f466955f8e5b50fa5b8d38b9e91675Emily Bernier 963958fae7ec3f466955f8e5b50fa5b8d38b9e91675Emily Bernier 964958fae7ec3f466955f8e5b50fa5b8d38b9e91675Emily Bernierint GlobalHandles::PostMarkSweepProcessing( 965958fae7ec3f466955f8e5b50fa5b8d38b9e91675Emily Bernier const int initial_post_gc_processing_count) { 966958fae7ec3f466955f8e5b50fa5b8d38b9e91675Emily Bernier int freed_nodes = 0; 967958fae7ec3f466955f8e5b50fa5b8d38b9e91675Emily Bernier for (NodeIterator it(this); !it.done(); it.Advance()) { 968958fae7ec3f466955f8e5b50fa5b8d38b9e91675Emily Bernier if (!it.node()->IsRetainer()) { 969958fae7ec3f466955f8e5b50fa5b8d38b9e91675Emily Bernier // Free nodes do not have weak callbacks. Do not use them to compute 970958fae7ec3f466955f8e5b50fa5b8d38b9e91675Emily Bernier // the freed_nodes. 971958fae7ec3f466955f8e5b50fa5b8d38b9e91675Emily Bernier continue; 972958fae7ec3f466955f8e5b50fa5b8d38b9e91675Emily Bernier } 973c8c1d9e03f4babd16833b0f8ccf6aab5fa6e8c7aBen Murdoch it.node()->set_active(false); 974958fae7ec3f466955f8e5b50fa5b8d38b9e91675Emily Bernier if (it.node()->PostGarbageCollectionProcessing(isolate_)) { 975958fae7ec3f466955f8e5b50fa5b8d38b9e91675Emily Bernier if (initial_post_gc_processing_count != post_gc_processing_count_) { 976958fae7ec3f466955f8e5b50fa5b8d38b9e91675Emily Bernier // See the comment above. 977958fae7ec3f466955f8e5b50fa5b8d38b9e91675Emily Bernier return freed_nodes; 978d0582a6c46733687d045e4188a1bcd0123c758a1Steve Block } 979a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block } 980958fae7ec3f466955f8e5b50fa5b8d38b9e91675Emily Bernier if (!it.node()->IsRetainer()) { 981958fae7ec3f466955f8e5b50fa5b8d38b9e91675Emily Bernier freed_nodes++; 982958fae7ec3f466955f8e5b50fa5b8d38b9e91675Emily Bernier } 983a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block } 984958fae7ec3f466955f8e5b50fa5b8d38b9e91675Emily Bernier return freed_nodes; 985958fae7ec3f466955f8e5b50fa5b8d38b9e91675Emily Bernier} 986958fae7ec3f466955f8e5b50fa5b8d38b9e91675Emily Bernier 987958fae7ec3f466955f8e5b50fa5b8d38b9e91675Emily Bernier 988958fae7ec3f466955f8e5b50fa5b8d38b9e91675Emily Berniervoid GlobalHandles::UpdateListOfNewSpaceNodes() { 9893fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch int last = 0; 9903fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch for (int i = 0; i < new_space_nodes_.length(); ++i) { 9913fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch Node* node = new_space_nodes_[i]; 992b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch DCHECK(node->is_in_new_space_list()); 993b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch if (node->IsRetainer()) { 994b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch if (isolate_->heap()->InNewSpace(node->object())) { 995b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch new_space_nodes_[last++] = node; 996b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch isolate_->heap()->IncrementNodesCopiedInNewSpace(); 997b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch } else { 998b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch node->set_in_new_space_list(false); 999b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch isolate_->heap()->IncrementNodesPromoted(); 1000b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch } 10013fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch } else { 10023fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch node->set_in_new_space_list(false); 1003b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch isolate_->heap()->IncrementNodesDiedInNewSpace(); 10043fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch } 1005d0582a6c46733687d045e4188a1bcd0123c758a1Steve Block } 10063fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch new_space_nodes_.Rewind(last); 1007014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch new_space_nodes_.Trim(); 1008958fae7ec3f466955f8e5b50fa5b8d38b9e91675Emily Bernier} 1009958fae7ec3f466955f8e5b50fa5b8d38b9e91675Emily Bernier 1010958fae7ec3f466955f8e5b50fa5b8d38b9e91675Emily Bernier 1011014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdochint GlobalHandles::DispatchPendingPhantomCallbacks( 1012014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch bool synchronous_second_pass) { 1013958fae7ec3f466955f8e5b50fa5b8d38b9e91675Emily Bernier int freed_nodes = 0; 1014109988c7ccb6f3fd1a58574fa3dfb88beaef6632Ben Murdoch List<PendingPhantomCallback> second_pass_callbacks; 1015014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch { 1016014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch // The initial pass callbacks must simply clear the nodes. 1017014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch for (auto i = pending_phantom_callbacks_.begin(); 1018014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch i != pending_phantom_callbacks_.end(); ++i) { 1019014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch auto callback = i; 1020014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch // Skip callbacks that have already been processed once. 1021014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch if (callback->node() == nullptr) continue; 1022014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch callback->Invoke(isolate()); 1023109988c7ccb6f3fd1a58574fa3dfb88beaef6632Ben Murdoch if (callback->callback()) second_pass_callbacks.Add(*callback); 1024014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch freed_nodes++; 1025014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch } 1026958fae7ec3f466955f8e5b50fa5b8d38b9e91675Emily Bernier } 1027109988c7ccb6f3fd1a58574fa3dfb88beaef6632Ben Murdoch pending_phantom_callbacks_.Clear(); 1028109988c7ccb6f3fd1a58574fa3dfb88beaef6632Ben Murdoch if (second_pass_callbacks.length() > 0) { 1029014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch if (FLAG_optimize_for_size || FLAG_predictable || synchronous_second_pass) { 1030014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch isolate()->heap()->CallGCPrologueCallbacks( 1031014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch GCType::kGCTypeProcessWeakCallbacks, kNoGCCallbackFlags); 1032109988c7ccb6f3fd1a58574fa3dfb88beaef6632Ben Murdoch InvokeSecondPassPhantomCallbacks(&second_pass_callbacks, isolate()); 1033014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch isolate()->heap()->CallGCEpilogueCallbacks( 1034014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch GCType::kGCTypeProcessWeakCallbacks, kNoGCCallbackFlags); 1035014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch } else { 1036014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch auto task = new PendingPhantomCallbacksSecondPassTask( 1037109988c7ccb6f3fd1a58574fa3dfb88beaef6632Ben Murdoch &second_pass_callbacks, isolate()); 1038014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch V8::GetCurrentPlatform()->CallOnForegroundThread( 1039014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch reinterpret_cast<v8::Isolate*>(isolate()), task); 1040014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch } 1041958fae7ec3f466955f8e5b50fa5b8d38b9e91675Emily Bernier } 1042b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch return freed_nodes; 1043a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block} 1044a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block 1045a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block 1046014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdochvoid GlobalHandles::PendingPhantomCallback::Invoke(Isolate* isolate) { 1047014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch Data::Callback* callback_addr = nullptr; 1048014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch if (node_ != nullptr) { 1049014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch // Initialize for first pass callback. 1050014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch DCHECK(node_->state() == Node::NEAR_DEATH); 1051014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch callback_addr = &callback_; 1052014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch } 1053014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch Data data(reinterpret_cast<v8::Isolate*>(isolate), parameter_, 1054014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch internal_fields_, callback_addr); 1055014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch Data::Callback callback = callback_; 1056014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch callback_ = nullptr; 1057014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch callback(data); 1058014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch if (node_ != nullptr) { 1059014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch // Transition to second pass state. 1060014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch DCHECK(node_->state() == Node::FREE); 1061014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch node_ = nullptr; 1062014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch } 1063014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch} 1064014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch 1065014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch 1066014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdochint GlobalHandles::PostGarbageCollectionProcessing( 1067014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch GarbageCollector collector, const v8::GCCallbackFlags gc_callback_flags) { 1068958fae7ec3f466955f8e5b50fa5b8d38b9e91675Emily Bernier // Process weak global handle callbacks. This must be done after the 1069958fae7ec3f466955f8e5b50fa5b8d38b9e91675Emily Bernier // GC is completely done, because the callbacks may invoke arbitrary 1070958fae7ec3f466955f8e5b50fa5b8d38b9e91675Emily Bernier // API functions. 1071958fae7ec3f466955f8e5b50fa5b8d38b9e91675Emily Bernier DCHECK(isolate_->heap()->gc_state() == Heap::NOT_IN_GC); 1072958fae7ec3f466955f8e5b50fa5b8d38b9e91675Emily Bernier const int initial_post_gc_processing_count = ++post_gc_processing_count_; 1073958fae7ec3f466955f8e5b50fa5b8d38b9e91675Emily Bernier int freed_nodes = 0; 1074014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch bool synchronous_second_pass = 1075014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch (gc_callback_flags & 1076109988c7ccb6f3fd1a58574fa3dfb88beaef6632Ben Murdoch (kGCCallbackFlagForced | kGCCallbackFlagCollectAllAvailableGarbage | 1077014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch kGCCallbackFlagSynchronousPhantomCallbackProcessing)) != 0; 1078014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch freed_nodes += DispatchPendingPhantomCallbacks(synchronous_second_pass); 1079014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch if (initial_post_gc_processing_count != post_gc_processing_count_) { 1080014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch // If the callbacks caused a nested GC, then return. See comment in 1081014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch // PostScavengeProcessing. 1082014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch return freed_nodes; 1083014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch } 1084c8c1d9e03f4babd16833b0f8ccf6aab5fa6e8c7aBen Murdoch if (Heap::IsYoungGenerationCollector(collector)) { 1085014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch freed_nodes += PostScavengeProcessing(initial_post_gc_processing_count); 1086958fae7ec3f466955f8e5b50fa5b8d38b9e91675Emily Bernier } else { 1087014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch freed_nodes += PostMarkSweepProcessing(initial_post_gc_processing_count); 1088958fae7ec3f466955f8e5b50fa5b8d38b9e91675Emily Bernier } 1089958fae7ec3f466955f8e5b50fa5b8d38b9e91675Emily Bernier if (initial_post_gc_processing_count != post_gc_processing_count_) { 1090958fae7ec3f466955f8e5b50fa5b8d38b9e91675Emily Bernier // If the callbacks caused a nested GC, then return. See comment in 1091958fae7ec3f466955f8e5b50fa5b8d38b9e91675Emily Bernier // PostScavengeProcessing. 1092958fae7ec3f466955f8e5b50fa5b8d38b9e91675Emily Bernier return freed_nodes; 1093958fae7ec3f466955f8e5b50fa5b8d38b9e91675Emily Bernier } 1094958fae7ec3f466955f8e5b50fa5b8d38b9e91675Emily Bernier if (initial_post_gc_processing_count == post_gc_processing_count_) { 1095958fae7ec3f466955f8e5b50fa5b8d38b9e91675Emily Bernier UpdateListOfNewSpaceNodes(); 1096958fae7ec3f466955f8e5b50fa5b8d38b9e91675Emily Bernier } 1097958fae7ec3f466955f8e5b50fa5b8d38b9e91675Emily Bernier return freed_nodes; 1098958fae7ec3f466955f8e5b50fa5b8d38b9e91675Emily Bernier} 1099958fae7ec3f466955f8e5b50fa5b8d38b9e91675Emily Bernier 1100958fae7ec3f466955f8e5b50fa5b8d38b9e91675Emily Bernier 1101d0582a6c46733687d045e4188a1bcd0123c758a1Steve Blockvoid GlobalHandles::IterateStrongRoots(ObjectVisitor* v) { 11023fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch for (NodeIterator it(this); !it.done(); it.Advance()) { 11033fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch if (it.node()->IsStrongRetainer()) { 11043fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch v->VisitPointer(it.node()->location()); 1105a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block } 1106a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block } 1107a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block} 1108a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block 1109d0582a6c46733687d045e4188a1bcd0123c758a1Steve Block 1110f91f0611dbaf29ca0f1d4aecb357ce243a19d2faBen MurdochDISABLE_CFI_PERF 1111d0582a6c46733687d045e4188a1bcd0123c758a1Steve Blockvoid GlobalHandles::IterateAllRoots(ObjectVisitor* v) { 11123fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch for (NodeIterator it(this); !it.done(); it.Advance()) { 11133fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch if (it.node()->IsRetainer()) { 11143fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch v->VisitPointer(it.node()->location()); 1115257744e915dfc84d6d07a6b2accf8402d9ffc708Ben Murdoch } 1116257744e915dfc84d6d07a6b2accf8402d9ffc708Ben Murdoch } 1117257744e915dfc84d6d07a6b2accf8402d9ffc708Ben Murdoch} 1118257744e915dfc84d6d07a6b2accf8402d9ffc708Ben Murdoch 1119257744e915dfc84d6d07a6b2accf8402d9ffc708Ben Murdoch 1120f91f0611dbaf29ca0f1d4aecb357ce243a19d2faBen MurdochDISABLE_CFI_PERF 112144f0eee88ff00398ff7f715fab053374d808c90dSteve Blockvoid GlobalHandles::IterateAllRootsWithClassIds(ObjectVisitor* v) { 11223fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch for (NodeIterator it(this); !it.done(); it.Advance()) { 1123b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch if (it.node()->IsRetainer() && it.node()->has_wrapper_class_id()) { 11243fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch v->VisitEmbedderReference(it.node()->location(), 11253fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch it.node()->wrapper_class_id()); 112644f0eee88ff00398ff7f715fab053374d808c90dSteve Block } 112744f0eee88ff00398ff7f715fab053374d808c90dSteve Block } 112844f0eee88ff00398ff7f715fab053374d808c90dSteve Block} 112944f0eee88ff00398ff7f715fab053374d808c90dSteve Block 113044f0eee88ff00398ff7f715fab053374d808c90dSteve Block 1131f91f0611dbaf29ca0f1d4aecb357ce243a19d2faBen MurdochDISABLE_CFI_PERF 1132b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdochvoid GlobalHandles::IterateAllRootsInNewSpaceWithClassIds(ObjectVisitor* v) { 1133b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch for (int i = 0; i < new_space_nodes_.length(); ++i) { 1134b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch Node* node = new_space_nodes_[i]; 1135b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch if (node->IsRetainer() && node->has_wrapper_class_id()) { 1136b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch v->VisitEmbedderReference(node->location(), 1137b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch node->wrapper_class_id()); 1138b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch } 1139b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch } 1140b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch} 1141b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 1142b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 1143f91f0611dbaf29ca0f1d4aecb357ce243a19d2faBen MurdochDISABLE_CFI_PERF 1144014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdochvoid GlobalHandles::IterateWeakRootsInNewSpaceWithClassIds(ObjectVisitor* v) { 1145014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch for (int i = 0; i < new_space_nodes_.length(); ++i) { 1146014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch Node* node = new_space_nodes_[i]; 1147014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch if (node->has_wrapper_class_id() && node->IsWeak()) { 1148014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch v->VisitEmbedderReference(node->location(), node->wrapper_class_id()); 1149014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch } 1150014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch } 1151014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch} 1152014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch 1153014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch 1154b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdochint GlobalHandles::NumberOfWeakHandles() { 1155b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch int count = 0; 1156b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch for (NodeIterator it(this); !it.done(); it.Advance()) { 1157b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch if (it.node()->IsWeakRetainer()) { 1158b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch count++; 1159b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch } 1160b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch } 1161b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch return count; 1162b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch} 1163b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 1164b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 1165b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdochint GlobalHandles::NumberOfGlobalObjectWeakHandles() { 1166b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch int count = 0; 1167b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch for (NodeIterator it(this); !it.done(); it.Advance()) { 1168b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch if (it.node()->IsWeakRetainer() && 1169b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch it.node()->object()->IsJSGlobalObject()) { 1170b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch count++; 1171b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch } 1172b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch } 1173b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch return count; 1174b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch} 1175b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 1176b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 1177d0582a6c46733687d045e4188a1bcd0123c758a1Steve Blockvoid GlobalHandles::RecordStats(HeapStats* stats) { 1178d0582a6c46733687d045e4188a1bcd0123c758a1Steve Block *stats->global_handle_count = 0; 1179d0582a6c46733687d045e4188a1bcd0123c758a1Steve Block *stats->weak_global_handle_count = 0; 1180d0582a6c46733687d045e4188a1bcd0123c758a1Steve Block *stats->pending_global_handle_count = 0; 1181d0582a6c46733687d045e4188a1bcd0123c758a1Steve Block *stats->near_death_global_handle_count = 0; 11823fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch *stats->free_global_handle_count = 0; 11833fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch for (NodeIterator it(this); !it.done(); it.Advance()) { 1184d0582a6c46733687d045e4188a1bcd0123c758a1Steve Block *stats->global_handle_count += 1; 11853fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch if (it.node()->state() == Node::WEAK) { 1186d0582a6c46733687d045e4188a1bcd0123c758a1Steve Block *stats->weak_global_handle_count += 1; 11873fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch } else if (it.node()->state() == Node::PENDING) { 1188d0582a6c46733687d045e4188a1bcd0123c758a1Steve Block *stats->pending_global_handle_count += 1; 11893fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch } else if (it.node()->state() == Node::NEAR_DEATH) { 1190d0582a6c46733687d045e4188a1bcd0123c758a1Steve Block *stats->near_death_global_handle_count += 1; 11913fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch } else if (it.node()->state() == Node::FREE) { 11923fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch *stats->free_global_handle_count += 1; 1193d0582a6c46733687d045e4188a1bcd0123c758a1Steve Block } 1194d0582a6c46733687d045e4188a1bcd0123c758a1Steve Block } 1195d0582a6c46733687d045e4188a1bcd0123c758a1Steve Block} 1196a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block 1197a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block#ifdef DEBUG 1198a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block 1199a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Blockvoid GlobalHandles::PrintStats() { 1200a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block int total = 0; 1201a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block int weak = 0; 1202a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block int pending = 0; 1203a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block int near_death = 0; 1204a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block int destroyed = 0; 1205a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block 12063fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch for (NodeIterator it(this); !it.done(); it.Advance()) { 1207a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block total++; 12083fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch if (it.node()->state() == Node::WEAK) weak++; 12093fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch if (it.node()->state() == Node::PENDING) pending++; 12103fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch if (it.node()->state() == Node::NEAR_DEATH) near_death++; 12113fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch if (it.node()->state() == Node::FREE) destroyed++; 1212a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block } 1213a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block 1214a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block PrintF("Global Handle Statistics:\n"); 1215bcf72ee8e3b26f1d0726869c7ddb3921c68b09a8Ben Murdoch PrintF(" allocated memory = %" PRIuS "B\n", total * sizeof(Node)); 1216a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block PrintF(" # weak = %d\n", weak); 1217a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block PrintF(" # pending = %d\n", pending); 1218a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block PrintF(" # near_death = %d\n", near_death); 12193fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch PrintF(" # free = %d\n", destroyed); 1220a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block PrintF(" # total = %d\n", total); 1221a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block} 1222a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block 1223b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 1224a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Blockvoid GlobalHandles::Print() { 1225a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block PrintF("Global handles:\n"); 12263fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch for (NodeIterator it(this); !it.done(); it.Advance()) { 12273fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch PrintF(" handle %p to %p%s\n", 12283fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch reinterpret_cast<void*>(it.node()->location()), 12293fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch reinterpret_cast<void*>(it.node()->object()), 12303fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch it.node()->IsWeak() ? " (weak)" : ""); 1231a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block } 1232a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block} 1233a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block 1234a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block#endif 1235a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block 1236a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block 123744f0eee88ff00398ff7f715fab053374d808c90dSteve Block 123844f0eee88ff00398ff7f715fab053374d808c90dSteve Blockvoid GlobalHandles::AddObjectGroup(Object*** handles, 123944f0eee88ff00398ff7f715fab053374d808c90dSteve Block size_t length, 124044f0eee88ff00398ff7f715fab053374d808c90dSteve Block v8::RetainedObjectInfo* info) { 1241257744e915dfc84d6d07a6b2accf8402d9ffc708Ben Murdoch#ifdef DEBUG 1242257744e915dfc84d6d07a6b2accf8402d9ffc708Ben Murdoch for (size_t i = 0; i < length; ++i) { 1243b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch DCHECK(!Node::FromLocation(handles[i])->is_independent()); 1244257744e915dfc84d6d07a6b2accf8402d9ffc708Ben Murdoch } 1245257744e915dfc84d6d07a6b2accf8402d9ffc708Ben Murdoch#endif 12468b112d2025046f85ef7f6be087c6129c872ebad2Ben Murdoch if (length == 0) { 12478b112d2025046f85ef7f6be087c6129c872ebad2Ben Murdoch if (info != NULL) info->Dispose(); 12488b112d2025046f85ef7f6be087c6129c872ebad2Ben Murdoch return; 124944f0eee88ff00398ff7f715fab053374d808c90dSteve Block } 1250b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch ObjectGroup* group = new ObjectGroup(length); 1251b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch for (size_t i = 0; i < length; ++i) 1252b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch group->objects[i] = handles[i]; 1253b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch group->info = info; 1254b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch object_groups_.Add(group); 125544f0eee88ff00398ff7f715fab053374d808c90dSteve Block} 125644f0eee88ff00398ff7f715fab053374d808c90dSteve Block 125744f0eee88ff00398ff7f715fab053374d808c90dSteve Block 1258b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdochvoid GlobalHandles::SetObjectGroupId(Object** handle, 1259b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch UniqueId id) { 1260b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch object_group_connections_.Add(ObjectGroupConnection(id, handle)); 1261b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch} 1262b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 1263b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 1264b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdochvoid GlobalHandles::SetRetainedObjectInfo(UniqueId id, 1265b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch RetainedObjectInfo* info) { 1266b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch retainer_infos_.Add(ObjectGroupRetainerInfo(id, info)); 1267b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch} 1268b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 1269b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 1270b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdochvoid GlobalHandles::SetReferenceFromGroup(UniqueId id, Object** child) { 1271b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch DCHECK(!Node::FromLocation(child)->is_independent()); 1272b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch implicit_ref_connections_.Add(ObjectGroupConnection(id, child)); 1273b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch} 1274b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 1275b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 1276b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdochvoid GlobalHandles::SetReference(HeapObject** parent, Object** child) { 1277b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch DCHECK(!Node::FromLocation(child)->is_independent()); 1278b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch ImplicitRefGroup* group = new ImplicitRefGroup(parent, 1); 1279b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch group->children[0] = child; 1280b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch implicit_ref_groups_.Add(group); 1281a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block} 1282a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block 1283a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block 1284a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Blockvoid GlobalHandles::RemoveObjectGroups() { 1285b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch for (int i = 0; i < object_groups_.length(); i++) 1286b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch delete object_groups_.at(i); 128744f0eee88ff00398ff7f715fab053374d808c90dSteve Block object_groups_.Clear(); 1288b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch for (int i = 0; i < retainer_infos_.length(); ++i) 1289b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch retainer_infos_[i].info->Dispose(); 1290b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch retainer_infos_.Clear(); 1291b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch object_group_connections_.Clear(); 1292b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch object_group_connections_.Initialize(kObjectGroupConnectionsCapacity); 1293a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block} 1294a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block 129544f0eee88ff00398ff7f715fab053374d808c90dSteve Block 129644f0eee88ff00398ff7f715fab053374d808c90dSteve Blockvoid GlobalHandles::RemoveImplicitRefGroups() { 129744f0eee88ff00398ff7f715fab053374d808c90dSteve Block for (int i = 0; i < implicit_ref_groups_.length(); i++) { 1298b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch delete implicit_ref_groups_.at(i); 129944f0eee88ff00398ff7f715fab053374d808c90dSteve Block } 130044f0eee88ff00398ff7f715fab053374d808c90dSteve Block implicit_ref_groups_.Clear(); 1301b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch implicit_ref_connections_.Clear(); 130244f0eee88ff00398ff7f715fab053374d808c90dSteve Block} 130344f0eee88ff00398ff7f715fab053374d808c90dSteve Block 130444f0eee88ff00398ff7f715fab053374d808c90dSteve Block 13053fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdochvoid GlobalHandles::TearDown() { 13063fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch // TODO(1428): invoke weak callbacks. 13073fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch} 13083fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch 13093fb3ca8c7ca439d408449a395897395c0faae8d1Ben Murdoch 1310b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdochvoid GlobalHandles::ComputeObjectGroupsAndImplicitReferences() { 1311b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch if (object_group_connections_.length() == 0) { 1312b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch for (int i = 0; i < retainer_infos_.length(); ++i) 1313b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch retainer_infos_[i].info->Dispose(); 1314b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch retainer_infos_.Clear(); 1315b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch implicit_ref_connections_.Clear(); 1316b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch return; 1317b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch } 1318b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 1319b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch object_group_connections_.Sort(); 1320b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch retainer_infos_.Sort(); 1321b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch implicit_ref_connections_.Sort(); 1322b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 1323b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch int info_index = 0; // For iterating retainer_infos_. 1324b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch UniqueId current_group_id(0); 1325b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch int current_group_start = 0; 1326b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 1327b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch int current_implicit_refs_start = 0; 1328b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch int current_implicit_refs_end = 0; 1329b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch for (int i = 0; i <= object_group_connections_.length(); ++i) { 1330b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch if (i == 0) 1331b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch current_group_id = object_group_connections_[i].id; 1332b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch if (i == object_group_connections_.length() || 1333b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch current_group_id != object_group_connections_[i].id) { 1334b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch // Group detected: objects in indices [current_group_start, i[. 1335b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 1336b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch // Find out which implicit references are related to this group. (We want 1337b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch // to ignore object groups which only have 1 object, but that object is 1338b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch // needed as a representative object for the implicit refrerence group.) 1339b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch while (current_implicit_refs_start < implicit_ref_connections_.length() && 1340b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch implicit_ref_connections_[current_implicit_refs_start].id < 1341b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch current_group_id) 1342b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch ++current_implicit_refs_start; 1343b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch current_implicit_refs_end = current_implicit_refs_start; 1344b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch while (current_implicit_refs_end < implicit_ref_connections_.length() && 1345b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch implicit_ref_connections_[current_implicit_refs_end].id == 1346b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch current_group_id) 1347b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch ++current_implicit_refs_end; 1348b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 1349b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch if (current_implicit_refs_end > current_implicit_refs_start) { 1350b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch // Find a representative object for the implicit references. 1351b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch HeapObject** representative = NULL; 1352b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch for (int j = current_group_start; j < i; ++j) { 1353b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch Object** object = object_group_connections_[j].object; 1354b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch if ((*object)->IsHeapObject()) { 1355b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch representative = reinterpret_cast<HeapObject**>(object); 1356b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch break; 1357b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch } 1358b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch } 1359b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch if (representative) { 1360b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch ImplicitRefGroup* group = new ImplicitRefGroup( 1361b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch representative, 1362b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch current_implicit_refs_end - current_implicit_refs_start); 1363b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch for (int j = current_implicit_refs_start; 1364b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch j < current_implicit_refs_end; 1365b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch ++j) { 1366b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch group->children[j - current_implicit_refs_start] = 1367b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch implicit_ref_connections_[j].object; 1368b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch } 1369b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch implicit_ref_groups_.Add(group); 1370b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch } 1371b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch current_implicit_refs_start = current_implicit_refs_end; 1372b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch } 1373b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 1374b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch // Find a RetainedObjectInfo for the group. 1375b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch RetainedObjectInfo* info = NULL; 1376b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch while (info_index < retainer_infos_.length() && 1377b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch retainer_infos_[info_index].id < current_group_id) { 1378b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch retainer_infos_[info_index].info->Dispose(); 1379b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch ++info_index; 1380b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch } 1381b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch if (info_index < retainer_infos_.length() && 1382b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch retainer_infos_[info_index].id == current_group_id) { 1383b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch // This object group has an associated ObjectGroupRetainerInfo. 1384b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch info = retainer_infos_[info_index].info; 1385b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch ++info_index; 1386b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch } 1387b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 1388b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch // Ignore groups which only contain one object. 1389b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch if (i > current_group_start + 1) { 1390b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch ObjectGroup* group = new ObjectGroup(i - current_group_start); 1391b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch for (int j = current_group_start; j < i; ++j) { 1392b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch group->objects[j - current_group_start] = 1393b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch object_group_connections_[j].object; 1394b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch } 1395b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch group->info = info; 1396b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch object_groups_.Add(group); 1397b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch } else if (info) { 1398b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch info->Dispose(); 1399b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch } 1400b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 1401b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch if (i < object_group_connections_.length()) { 1402b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch current_group_id = object_group_connections_[i].id; 1403b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch current_group_start = i; 1404b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch } 1405b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch } 1406b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch } 1407b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch object_group_connections_.Clear(); 1408b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch object_group_connections_.Initialize(kObjectGroupConnectionsCapacity); 1409b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch retainer_infos_.Clear(); 1410b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch implicit_ref_connections_.Clear(); 1411b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch} 1412b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 1413b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 1414b8a8cc1952d61a2f3a2568848933943a543b5d3eBen MurdochEternalHandles::EternalHandles() : size_(0) { 1415b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch for (unsigned i = 0; i < arraysize(singleton_handles_); i++) { 1416b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch singleton_handles_[i] = kInvalidIndex; 1417b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch } 1418b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch} 1419b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 1420b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 1421b8a8cc1952d61a2f3a2568848933943a543b5d3eBen MurdochEternalHandles::~EternalHandles() { 1422b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch for (int i = 0; i < blocks_.length(); i++) delete[] blocks_[i]; 1423b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch} 1424b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 1425b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 1426b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdochvoid EternalHandles::IterateAllRoots(ObjectVisitor* visitor) { 1427b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch int limit = size_; 1428b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch for (int i = 0; i < blocks_.length(); i++) { 1429b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch DCHECK(limit > 0); 1430b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch Object** block = blocks_[i]; 1431b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch visitor->VisitPointers(block, block + Min(limit, kSize)); 1432b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch limit -= kSize; 1433b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch } 1434b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch} 1435b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 1436b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 1437b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdochvoid EternalHandles::IterateNewSpaceRoots(ObjectVisitor* visitor) { 1438b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch for (int i = 0; i < new_space_indices_.length(); i++) { 1439b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch visitor->VisitPointer(GetLocation(new_space_indices_[i])); 1440b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch } 1441b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch} 1442b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 1443b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 1444b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdochvoid EternalHandles::PostGarbageCollectionProcessing(Heap* heap) { 1445b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch int last = 0; 1446b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch for (int i = 0; i < new_space_indices_.length(); i++) { 1447b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch int index = new_space_indices_[i]; 1448b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch if (heap->InNewSpace(*GetLocation(index))) { 1449b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch new_space_indices_[last++] = index; 1450b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch } 1451b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch } 1452b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch new_space_indices_.Rewind(last); 1453b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch} 1454b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 1455b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 1456b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdochvoid EternalHandles::Create(Isolate* isolate, Object* object, int* index) { 1457b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch DCHECK_EQ(kInvalidIndex, *index); 1458b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch if (object == NULL) return; 1459b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch DCHECK_NE(isolate->heap()->the_hole_value(), object); 1460b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch int block = size_ >> kShift; 1461b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch int offset = size_ & kMask; 1462b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch // need to resize 1463b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch if (offset == 0) { 1464b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch Object** next_block = new Object*[kSize]; 1465b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch Object* the_hole = isolate->heap()->the_hole_value(); 1466b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch MemsetPointer(next_block, the_hole, kSize); 1467b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch blocks_.Add(next_block); 1468b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch } 1469b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch DCHECK_EQ(isolate->heap()->the_hole_value(), blocks_[block][offset]); 1470b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch blocks_[block][offset] = object; 1471b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch if (isolate->heap()->InNewSpace(object)) { 1472b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch new_space_indices_.Add(size_); 1473b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch } 1474b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch *index = size_++; 1475b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch} 1476b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 1477b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 1478014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch} // namespace internal 1479014dc512cdd3e367bee49a713fdc5ed92584a3e5Ben Murdoch} // namespace v8 1480