Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1 | // Copyright 2012 the V8 project authors. All rights reserved. |
| 2 | // Use of this source code is governed by a BSD-style license that can be |
| 3 | // found in the LICENSE file. |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 4 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 5 | #include "src/v8threads.h" |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 6 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 7 | #include "src/api.h" |
| 8 | #include "src/bootstrapper.h" |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 9 | #include "src/debug/debug.h" |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 10 | #include "src/execution.h" |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 11 | #include "src/isolate-inl.h" |
| 12 | #include "src/regexp/regexp-stack.h" |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 13 | |
| 14 | namespace v8 { |
| 15 | |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 16 | |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 17 | namespace { |
| 18 | |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 19 | // Track whether this V8 instance has ever called v8::Locker. This allows the |
| 20 | // API code to verify that the lock is always held when V8 is being entered. |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 21 | base::Atomic32 g_locker_was_ever_used_ = 0; |
| 22 | |
| 23 | } // namespace |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 24 | |
| 25 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 26 | // Once the Locker is initialized, the current thread will be guaranteed to have |
| 27 | // the lock for a given isolate. |
| 28 | void Locker::Initialize(v8::Isolate* isolate) { |
| 29 | DCHECK(isolate != NULL); |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 30 | has_lock_ = false; |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 31 | top_level_ = true; |
| 32 | isolate_ = reinterpret_cast<i::Isolate*>(isolate); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 33 | // Record that the Locker has been used at least once. |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 34 | base::NoBarrier_Store(&g_locker_was_ever_used_, 1); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 35 | // Get the big lock if necessary. |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 36 | if (!isolate_->thread_manager()->IsLockedByCurrentThread()) { |
| 37 | isolate_->thread_manager()->Lock(); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 38 | has_lock_ = true; |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 39 | |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 40 | // This may be a locker within an unlocker in which case we have to |
| 41 | // get the saved state for this thread and restore it. |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 42 | if (isolate_->thread_manager()->RestoreThread()) { |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 43 | top_level_ = false; |
| 44 | } else { |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 45 | internal::ExecutionAccess access(isolate_); |
| 46 | isolate_->stack_guard()->ClearThread(access); |
| 47 | isolate_->stack_guard()->InitThread(access); |
| 48 | } |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 49 | } |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 50 | DCHECK(isolate_->thread_manager()->IsLockedByCurrentThread()); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 51 | } |
| 52 | |
| 53 | |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 54 | bool Locker::IsLocked(v8::Isolate* isolate) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 55 | DCHECK(isolate != NULL); |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 56 | i::Isolate* internal_isolate = reinterpret_cast<i::Isolate*>(isolate); |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 57 | return internal_isolate->thread_manager()->IsLockedByCurrentThread(); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 58 | } |
| 59 | |
| 60 | |
Ben Murdoch | 69a99ed | 2011-11-30 16:03:39 +0000 | [diff] [blame] | 61 | bool Locker::IsActive() { |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 62 | return !!base::NoBarrier_Load(&g_locker_was_ever_used_); |
Ben Murdoch | 69a99ed | 2011-11-30 16:03:39 +0000 | [diff] [blame] | 63 | } |
| 64 | |
| 65 | |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 66 | Locker::~Locker() { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 67 | DCHECK(isolate_->thread_manager()->IsLockedByCurrentThread()); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 68 | if (has_lock_) { |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 69 | if (top_level_) { |
| 70 | isolate_->thread_manager()->FreeThreadResources(); |
| 71 | } else { |
| 72 | isolate_->thread_manager()->ArchiveThread(); |
| 73 | } |
| 74 | isolate_->thread_manager()->Unlock(); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 75 | } |
| 76 | } |
| 77 | |
| 78 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 79 | void Unlocker::Initialize(v8::Isolate* isolate) { |
| 80 | DCHECK(isolate != NULL); |
| 81 | isolate_ = reinterpret_cast<i::Isolate*>(isolate); |
| 82 | DCHECK(isolate_->thread_manager()->IsLockedByCurrentThread()); |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 83 | isolate_->thread_manager()->ArchiveThread(); |
| 84 | isolate_->thread_manager()->Unlock(); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 85 | } |
| 86 | |
| 87 | |
| 88 | Unlocker::~Unlocker() { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 89 | DCHECK(!isolate_->thread_manager()->IsLockedByCurrentThread()); |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 90 | isolate_->thread_manager()->Lock(); |
| 91 | isolate_->thread_manager()->RestoreThread(); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 92 | } |
| 93 | |
| 94 | |
| 95 | namespace internal { |
| 96 | |
| 97 | |
| 98 | bool ThreadManager::RestoreThread() { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 99 | DCHECK(IsLockedByCurrentThread()); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 100 | // First check whether the current thread has been 'lazily archived', i.e. |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 101 | // not archived at all. If that is the case we put the state storage we |
| 102 | // had prepared back in the free list, since we didn't need it after all. |
Ben Murdoch | 8b112d2 | 2011-06-08 16:22:53 +0100 | [diff] [blame] | 103 | if (lazily_archived_thread_.Equals(ThreadId::Current())) { |
| 104 | lazily_archived_thread_ = ThreadId::Invalid(); |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 105 | Isolate::PerIsolateThreadData* per_thread = |
| 106 | isolate_->FindPerThreadDataForThisThread(); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 107 | DCHECK(per_thread != NULL); |
| 108 | DCHECK(per_thread->thread_state() == lazily_archived_thread_state_); |
Ben Murdoch | 8b112d2 | 2011-06-08 16:22:53 +0100 | [diff] [blame] | 109 | lazily_archived_thread_state_->set_id(ThreadId::Invalid()); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 110 | lazily_archived_thread_state_->LinkInto(ThreadState::FREE_LIST); |
| 111 | lazily_archived_thread_state_ = NULL; |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 112 | per_thread->set_thread_state(NULL); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 113 | return true; |
| 114 | } |
| 115 | |
| 116 | // Make sure that the preemption thread cannot modify the thread state while |
| 117 | // it is being archived or restored. |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 118 | ExecutionAccess access(isolate_); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 119 | |
| 120 | // If there is another thread that was lazily archived then we have to really |
| 121 | // archive it now. |
| 122 | if (lazily_archived_thread_.IsValid()) { |
| 123 | EagerlyArchiveThread(); |
| 124 | } |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 125 | Isolate::PerIsolateThreadData* per_thread = |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 126 | isolate_->FindPerThreadDataForThisThread(); |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 127 | if (per_thread == NULL || per_thread->thread_state() == NULL) { |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 128 | // This is a new thread. |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 129 | isolate_->stack_guard()->InitThread(access); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 130 | return false; |
| 131 | } |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 132 | ThreadState* state = per_thread->thread_state(); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 133 | char* from = state->data(); |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 134 | from = isolate_->handle_scope_implementer()->RestoreThread(from); |
| 135 | from = isolate_->RestoreThread(from); |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 136 | from = Relocatable::RestoreState(isolate_, from); |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 137 | from = isolate_->debug()->RestoreDebug(from); |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 138 | from = isolate_->stack_guard()->RestoreStackGuard(from); |
| 139 | from = isolate_->regexp_stack()->RestoreStack(from); |
| 140 | from = isolate_->bootstrapper()->RestoreState(from); |
| 141 | per_thread->set_thread_state(NULL); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 142 | if (state->terminate_on_restore()) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 143 | isolate_->stack_guard()->RequestTerminateExecution(); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 144 | state->set_terminate_on_restore(false); |
| 145 | } |
Ben Murdoch | 8b112d2 | 2011-06-08 16:22:53 +0100 | [diff] [blame] | 146 | state->set_id(ThreadId::Invalid()); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 147 | state->Unlink(); |
| 148 | state->LinkInto(ThreadState::FREE_LIST); |
| 149 | return true; |
| 150 | } |
| 151 | |
| 152 | |
| 153 | void ThreadManager::Lock() { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 154 | mutex_.Lock(); |
Ben Murdoch | 8b112d2 | 2011-06-08 16:22:53 +0100 | [diff] [blame] | 155 | mutex_owner_ = ThreadId::Current(); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 156 | DCHECK(IsLockedByCurrentThread()); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 157 | } |
| 158 | |
| 159 | |
| 160 | void ThreadManager::Unlock() { |
Ben Murdoch | 8b112d2 | 2011-06-08 16:22:53 +0100 | [diff] [blame] | 161 | mutex_owner_ = ThreadId::Invalid(); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 162 | mutex_.Unlock(); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 163 | } |
| 164 | |
| 165 | |
| 166 | static int ArchiveSpacePerThread() { |
| 167 | return HandleScopeImplementer::ArchiveSpacePerThread() + |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 168 | Isolate::ArchiveSpacePerThread() + |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 169 | Debug::ArchiveSpacePerThread() + |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 170 | StackGuard::ArchiveSpacePerThread() + |
| 171 | RegExpStack::ArchiveSpacePerThread() + |
| 172 | Bootstrapper::ArchiveSpacePerThread() + |
| 173 | Relocatable::ArchiveSpacePerThread(); |
| 174 | } |
| 175 | |
| 176 | |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 177 | ThreadState::ThreadState(ThreadManager* thread_manager) |
Ben Murdoch | 8b112d2 | 2011-06-08 16:22:53 +0100 | [diff] [blame] | 178 | : id_(ThreadId::Invalid()), |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 179 | terminate_on_restore_(false), |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 180 | data_(NULL), |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 181 | next_(this), |
| 182 | previous_(this), |
| 183 | thread_manager_(thread_manager) { |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 184 | } |
| 185 | |
| 186 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 187 | ThreadState::~ThreadState() { |
| 188 | DeleteArray<char>(data_); |
| 189 | } |
| 190 | |
| 191 | |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 192 | void ThreadState::AllocateSpace() { |
| 193 | data_ = NewArray<char>(ArchiveSpacePerThread()); |
| 194 | } |
| 195 | |
| 196 | |
| 197 | void ThreadState::Unlink() { |
| 198 | next_->previous_ = previous_; |
| 199 | previous_->next_ = next_; |
| 200 | } |
| 201 | |
| 202 | |
| 203 | void ThreadState::LinkInto(List list) { |
| 204 | ThreadState* flying_anchor = |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 205 | list == FREE_LIST ? thread_manager_->free_anchor_ |
| 206 | : thread_manager_->in_use_anchor_; |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 207 | next_ = flying_anchor->next_; |
| 208 | previous_ = flying_anchor; |
| 209 | flying_anchor->next_ = this; |
| 210 | next_->previous_ = this; |
| 211 | } |
| 212 | |
| 213 | |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 214 | ThreadState* ThreadManager::GetFreeThreadState() { |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 215 | ThreadState* gotten = free_anchor_->next_; |
| 216 | if (gotten == free_anchor_) { |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 217 | ThreadState* new_thread_state = new ThreadState(this); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 218 | new_thread_state->AllocateSpace(); |
| 219 | return new_thread_state; |
| 220 | } |
| 221 | return gotten; |
| 222 | } |
| 223 | |
| 224 | |
| 225 | // Gets the first in the list of archived threads. |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 226 | ThreadState* ThreadManager::FirstThreadStateInUse() { |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 227 | return in_use_anchor_->Next(); |
| 228 | } |
| 229 | |
| 230 | |
| 231 | ThreadState* ThreadState::Next() { |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 232 | if (next_ == thread_manager_->in_use_anchor_) return NULL; |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 233 | return next_; |
| 234 | } |
| 235 | |
| 236 | |
| 237 | // Thread ids must start with 1, because in TLS having thread id 0 can't |
| 238 | // be distinguished from not having a thread id at all (since NULL is |
| 239 | // defined as 0.) |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 240 | ThreadManager::ThreadManager() |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 241 | : mutex_owner_(ThreadId::Invalid()), |
Ben Murdoch | 8b112d2 | 2011-06-08 16:22:53 +0100 | [diff] [blame] | 242 | lazily_archived_thread_(ThreadId::Invalid()), |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 243 | lazily_archived_thread_state_(NULL), |
| 244 | free_anchor_(NULL), |
| 245 | in_use_anchor_(NULL) { |
| 246 | free_anchor_ = new ThreadState(this); |
| 247 | in_use_anchor_ = new ThreadState(this); |
| 248 | } |
| 249 | |
| 250 | |
| 251 | ThreadManager::~ThreadManager() { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 252 | DeleteThreadStateList(free_anchor_); |
| 253 | DeleteThreadStateList(in_use_anchor_); |
| 254 | } |
| 255 | |
| 256 | |
| 257 | void ThreadManager::DeleteThreadStateList(ThreadState* anchor) { |
| 258 | // The list starts and ends with the anchor. |
| 259 | for (ThreadState* current = anchor->next_; current != anchor;) { |
| 260 | ThreadState* next = current->next_; |
| 261 | delete current; |
| 262 | current = next; |
| 263 | } |
| 264 | delete anchor; |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 265 | } |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 266 | |
| 267 | |
| 268 | void ThreadManager::ArchiveThread() { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 269 | DCHECK(lazily_archived_thread_.Equals(ThreadId::Invalid())); |
| 270 | DCHECK(!IsArchived()); |
| 271 | DCHECK(IsLockedByCurrentThread()); |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 272 | ThreadState* state = GetFreeThreadState(); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 273 | state->Unlink(); |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 274 | Isolate::PerIsolateThreadData* per_thread = |
| 275 | isolate_->FindOrAllocatePerThreadDataForThisThread(); |
| 276 | per_thread->set_thread_state(state); |
Ben Murdoch | 8b112d2 | 2011-06-08 16:22:53 +0100 | [diff] [blame] | 277 | lazily_archived_thread_ = ThreadId::Current(); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 278 | lazily_archived_thread_state_ = state; |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 279 | DCHECK(state->id().Equals(ThreadId::Invalid())); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 280 | state->set_id(CurrentId()); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 281 | DCHECK(!state->id().Equals(ThreadId::Invalid())); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 282 | } |
| 283 | |
| 284 | |
| 285 | void ThreadManager::EagerlyArchiveThread() { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 286 | DCHECK(IsLockedByCurrentThread()); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 287 | ThreadState* state = lazily_archived_thread_state_; |
| 288 | state->LinkInto(ThreadState::IN_USE_LIST); |
| 289 | char* to = state->data(); |
| 290 | // Ensure that data containing GC roots are archived first, and handle them |
| 291 | // in ThreadManager::Iterate(ObjectVisitor*). |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 292 | to = isolate_->handle_scope_implementer()->ArchiveThread(to); |
| 293 | to = isolate_->ArchiveThread(to); |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 294 | to = Relocatable::ArchiveState(isolate_, to); |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 295 | to = isolate_->debug()->ArchiveDebug(to); |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 296 | to = isolate_->stack_guard()->ArchiveStackGuard(to); |
| 297 | to = isolate_->regexp_stack()->ArchiveStack(to); |
| 298 | to = isolate_->bootstrapper()->ArchiveState(to); |
Ben Murdoch | 8b112d2 | 2011-06-08 16:22:53 +0100 | [diff] [blame] | 299 | lazily_archived_thread_ = ThreadId::Invalid(); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 300 | lazily_archived_thread_state_ = NULL; |
| 301 | } |
| 302 | |
| 303 | |
| 304 | void ThreadManager::FreeThreadResources() { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 305 | DCHECK(!isolate_->has_pending_exception()); |
| 306 | DCHECK(!isolate_->external_caught_exception()); |
| 307 | DCHECK(isolate_->try_catch_handler() == NULL); |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 308 | isolate_->handle_scope_implementer()->FreeThreadResources(); |
| 309 | isolate_->FreeThreadResources(); |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 310 | isolate_->debug()->FreeThreadResources(); |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 311 | isolate_->stack_guard()->FreeThreadResources(); |
| 312 | isolate_->regexp_stack()->FreeThreadResources(); |
| 313 | isolate_->bootstrapper()->FreeThreadResources(); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 314 | } |
| 315 | |
| 316 | |
| 317 | bool ThreadManager::IsArchived() { |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 318 | Isolate::PerIsolateThreadData* data = |
| 319 | isolate_->FindPerThreadDataForThisThread(); |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 320 | return data != NULL && data->thread_state() != NULL; |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 321 | } |
| 322 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 323 | |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 324 | void ThreadManager::Iterate(ObjectVisitor* v) { |
| 325 | // Expecting no threads during serialization/deserialization |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 326 | for (ThreadState* state = FirstThreadStateInUse(); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 327 | state != NULL; |
| 328 | state = state->Next()) { |
| 329 | char* data = state->data(); |
| 330 | data = HandleScopeImplementer::Iterate(v, data); |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 331 | data = isolate_->Iterate(v, data); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 332 | data = Relocatable::Iterate(v, data); |
| 333 | } |
| 334 | } |
| 335 | |
| 336 | |
Ben Murdoch | 7f4d5bd | 2010-06-15 11:15:29 +0100 | [diff] [blame] | 337 | void ThreadManager::IterateArchivedThreads(ThreadVisitor* v) { |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 338 | for (ThreadState* state = FirstThreadStateInUse(); |
Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [diff] [blame] | 339 | state != NULL; |
| 340 | state = state->Next()) { |
| 341 | char* data = state->data(); |
| 342 | data += HandleScopeImplementer::ArchiveSpacePerThread(); |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 343 | isolate_->IterateThread(v, data); |
Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [diff] [blame] | 344 | } |
| 345 | } |
| 346 | |
| 347 | |
Ben Murdoch | 8b112d2 | 2011-06-08 16:22:53 +0100 | [diff] [blame] | 348 | ThreadId ThreadManager::CurrentId() { |
| 349 | return ThreadId::Current(); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 350 | } |
| 351 | |
| 352 | |
Ben Murdoch | 8b112d2 | 2011-06-08 16:22:53 +0100 | [diff] [blame] | 353 | void ThreadManager::TerminateExecution(ThreadId thread_id) { |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 354 | for (ThreadState* state = FirstThreadStateInUse(); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 355 | state != NULL; |
| 356 | state = state->Next()) { |
Ben Murdoch | 8b112d2 | 2011-06-08 16:22:53 +0100 | [diff] [blame] | 357 | if (thread_id.Equals(state->id())) { |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 358 | state->set_terminate_on_restore(true); |
| 359 | } |
| 360 | } |
| 361 | } |
| 362 | |
| 363 | |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 364 | } // namespace internal |
| 365 | } // namespace v8 |