Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 1 | // Copyright 2010 the V8 project authors. All rights reserved. |
| 2 | // Redistribution and use in source and binary forms, with or without |
| 3 | // modification, are permitted provided that the following conditions are |
| 4 | // met: |
| 5 | // |
| 6 | // * Redistributions of source code must retain the above copyright |
| 7 | // notice, this list of conditions and the following disclaimer. |
| 8 | // * Redistributions in binary form must reproduce the above |
| 9 | // copyright notice, this list of conditions and the following |
| 10 | // disclaimer in the documentation and/or other materials provided |
| 11 | // with the distribution. |
| 12 | // * Neither the name of Google Inc. nor the names of its |
| 13 | // contributors may be used to endorse or promote products derived |
| 14 | // from this software without specific prior written permission. |
| 15 | // |
| 16 | // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
| 17 | // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
| 18 | // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
| 19 | // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT |
| 20 | // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
| 21 | // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
| 22 | // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
| 23 | // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
| 24 | // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| 25 | // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
| 26 | // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| 27 | |
| 28 | #ifndef V8_ISOLATE_H_ |
| 29 | #define V8_ISOLATE_H_ |
| 30 | |
| 31 | #include "../include/v8-debug.h" |
| 32 | #include "allocation.h" |
| 33 | #include "apiutils.h" |
| 34 | #include "atomicops.h" |
| 35 | #include "builtins.h" |
| 36 | #include "contexts.h" |
| 37 | #include "execution.h" |
| 38 | #include "frames.h" |
| 39 | #include "global-handles.h" |
| 40 | #include "handles.h" |
| 41 | #include "heap.h" |
| 42 | #include "regexp-stack.h" |
| 43 | #include "runtime-profiler.h" |
| 44 | #include "runtime.h" |
| 45 | #include "zone.h" |
| 46 | |
| 47 | namespace v8 { |
| 48 | namespace internal { |
| 49 | |
| 50 | class AstSentinels; |
| 51 | class Bootstrapper; |
| 52 | class CodeGenerator; |
| 53 | class CodeRange; |
| 54 | class CompilationCache; |
| 55 | class ContextSlotCache; |
| 56 | class ContextSwitcher; |
| 57 | class Counters; |
| 58 | class CpuFeatures; |
| 59 | class CpuProfiler; |
| 60 | class DeoptimizerData; |
| 61 | class Deserializer; |
| 62 | class EmptyStatement; |
| 63 | class ExternalReferenceTable; |
| 64 | class Factory; |
| 65 | class FunctionInfoListener; |
| 66 | class HandleScopeImplementer; |
| 67 | class HeapProfiler; |
| 68 | class InlineRuntimeFunctionsTable; |
| 69 | class NoAllocationStringAllocator; |
| 70 | class PcToCodeCache; |
| 71 | class PreallocatedMemoryThread; |
| 72 | class ProducerHeapProfile; |
| 73 | class RegExpStack; |
| 74 | class SaveContext; |
| 75 | class ScannerConstants; |
| 76 | class StringInputBuffer; |
| 77 | class StringTracker; |
| 78 | class StubCache; |
| 79 | class ThreadManager; |
| 80 | class ThreadState; |
| 81 | class ThreadVisitor; // Defined in v8threads.h |
| 82 | class VMState; |
| 83 | |
| 84 | // 'void function pointer', used to roundtrip the |
| 85 | // ExternalReference::ExternalReferenceRedirector since we can not include |
| 86 | // assembler.h, where it is defined, here. |
| 87 | typedef void* ExternalReferenceRedirectorPointer(); |
| 88 | |
| 89 | |
| 90 | #ifdef ENABLE_DEBUGGER_SUPPORT |
| 91 | class Debug; |
| 92 | class Debugger; |
| 93 | class DebuggerAgent; |
| 94 | #endif |
| 95 | |
| 96 | #if !defined(__arm__) && defined(V8_TARGET_ARCH_ARM) || \ |
| 97 | !defined(__mips__) && defined(V8_TARGET_ARCH_MIPS) |
| 98 | class Redirection; |
| 99 | class Simulator; |
| 100 | #endif |
| 101 | |
| 102 | |
| 103 | // Static indirection table for handles to constants. If a frame |
| 104 | // element represents a constant, the data contains an index into |
| 105 | // this table of handles to the actual constants. |
| 106 | // Static indirection table for handles to constants. If a Result |
| 107 | // represents a constant, the data contains an index into this table |
| 108 | // of handles to the actual constants. |
| 109 | typedef ZoneList<Handle<Object> > ZoneObjectList; |
| 110 | |
| 111 | #define RETURN_IF_SCHEDULED_EXCEPTION(isolate) \ |
| 112 | if (isolate->has_scheduled_exception()) \ |
| 113 | return isolate->PromoteScheduledException() |
| 114 | |
| 115 | #define RETURN_IF_EMPTY_HANDLE_VALUE(isolate, call, value) \ |
| 116 | if (call.is_null()) { \ |
| 117 | ASSERT(isolate->has_pending_exception()); \ |
| 118 | return value; \ |
| 119 | } |
| 120 | |
| 121 | #define RETURN_IF_EMPTY_HANDLE(isolate, call) \ |
| 122 | RETURN_IF_EMPTY_HANDLE_VALUE(isolate, call, Failure::Exception()) |
| 123 | |
| 124 | #define ISOLATE_ADDRESS_LIST(C) \ |
| 125 | C(handler_address) \ |
| 126 | C(c_entry_fp_address) \ |
| 127 | C(context_address) \ |
| 128 | C(pending_exception_address) \ |
| 129 | C(external_caught_exception_address) |
| 130 | |
| 131 | #ifdef ENABLE_LOGGING_AND_PROFILING |
| 132 | #define ISOLATE_ADDRESS_LIST_PROF(C) \ |
| 133 | C(js_entry_sp_address) |
| 134 | #else |
| 135 | #define ISOLATE_ADDRESS_LIST_PROF(C) |
| 136 | #endif |
| 137 | |
| 138 | |
| 139 | class ThreadLocalTop BASE_EMBEDDED { |
| 140 | public: |
| 141 | // Initialize the thread data. |
| 142 | void Initialize(); |
| 143 | |
| 144 | // Get the top C++ try catch handler or NULL if none are registered. |
| 145 | // |
| 146 | // This method is not guarenteed to return an address that can be |
| 147 | // used for comparison with addresses into the JS stack. If such an |
| 148 | // address is needed, use try_catch_handler_address. |
| 149 | v8::TryCatch* TryCatchHandler(); |
| 150 | |
| 151 | // Get the address of the top C++ try catch handler or NULL if |
| 152 | // none are registered. |
| 153 | // |
| 154 | // This method always returns an address that can be compared to |
| 155 | // pointers into the JavaScript stack. When running on actual |
| 156 | // hardware, try_catch_handler_address and TryCatchHandler return |
| 157 | // the same pointer. When running on a simulator with a separate JS |
| 158 | // stack, try_catch_handler_address returns a JS stack address that |
| 159 | // corresponds to the place on the JS stack where the C++ handler |
| 160 | // would have been if the stack were not separate. |
| 161 | inline Address try_catch_handler_address() { |
| 162 | return try_catch_handler_address_; |
| 163 | } |
| 164 | |
| 165 | // Set the address of the top C++ try catch handler. |
| 166 | inline void set_try_catch_handler_address(Address address) { |
| 167 | try_catch_handler_address_ = address; |
| 168 | } |
| 169 | |
| 170 | void Free() { |
| 171 | ASSERT(!has_pending_message_); |
| 172 | ASSERT(!external_caught_exception_); |
| 173 | ASSERT(try_catch_handler_address_ == NULL); |
| 174 | } |
| 175 | |
| 176 | // The context where the current execution method is created and for variable |
| 177 | // lookups. |
| 178 | Context* context_; |
| 179 | int thread_id_; |
| 180 | MaybeObject* pending_exception_; |
| 181 | bool has_pending_message_; |
| 182 | const char* pending_message_; |
| 183 | Object* pending_message_obj_; |
| 184 | Script* pending_message_script_; |
| 185 | int pending_message_start_pos_; |
| 186 | int pending_message_end_pos_; |
| 187 | // Use a separate value for scheduled exceptions to preserve the |
| 188 | // invariants that hold about pending_exception. We may want to |
| 189 | // unify them later. |
| 190 | MaybeObject* scheduled_exception_; |
| 191 | bool external_caught_exception_; |
| 192 | SaveContext* save_context_; |
| 193 | v8::TryCatch* catcher_; |
| 194 | |
| 195 | // Stack. |
| 196 | Address c_entry_fp_; // the frame pointer of the top c entry frame |
| 197 | Address handler_; // try-blocks are chained through the stack |
| 198 | |
| 199 | #ifdef USE_SIMULATOR |
| 200 | #if defined(V8_TARGET_ARCH_ARM) || defined(V8_TARGET_ARCH_MIPS) |
| 201 | Simulator* simulator_; |
| 202 | #endif |
| 203 | #endif // USE_SIMULATOR |
| 204 | |
| 205 | #ifdef ENABLE_LOGGING_AND_PROFILING |
| 206 | Address js_entry_sp_; // the stack pointer of the bottom js entry frame |
| 207 | Address external_callback_; // the external callback we're currently in |
| 208 | #endif |
| 209 | |
| 210 | #ifdef ENABLE_VMSTATE_TRACKING |
| 211 | StateTag current_vm_state_; |
| 212 | #endif |
| 213 | |
| 214 | // Generated code scratch locations. |
| 215 | int32_t formal_count_; |
| 216 | |
| 217 | // Call back function to report unsafe JS accesses. |
| 218 | v8::FailedAccessCheckCallback failed_access_check_callback_; |
| 219 | |
| 220 | private: |
| 221 | Address try_catch_handler_address_; |
| 222 | }; |
| 223 | |
| 224 | #if defined(V8_TARGET_ARCH_ARM) || defined(V8_TARGET_ARCH_MIPS) |
| 225 | |
| 226 | #define ISOLATE_PLATFORM_INIT_LIST(V) \ |
| 227 | /* VirtualFrame::SpilledScope state */ \ |
| 228 | V(bool, is_virtual_frame_in_spilled_scope, false) \ |
| 229 | /* CodeGenerator::EmitNamedStore state */ \ |
| 230 | V(int, inlined_write_barrier_size, -1) |
| 231 | |
| 232 | #if !defined(__arm__) && !defined(__mips__) |
| 233 | class HashMap; |
| 234 | #endif |
| 235 | |
| 236 | #else |
| 237 | |
| 238 | #define ISOLATE_PLATFORM_INIT_LIST(V) |
| 239 | |
| 240 | #endif |
| 241 | |
| 242 | #ifdef ENABLE_DEBUGGER_SUPPORT |
| 243 | |
| 244 | #define ISOLATE_DEBUGGER_INIT_LIST(V) \ |
| 245 | V(v8::Debug::EventCallback, debug_event_callback, NULL) \ |
| 246 | V(DebuggerAgent*, debugger_agent_instance, NULL) |
| 247 | #else |
| 248 | |
| 249 | #define ISOLATE_DEBUGGER_INIT_LIST(V) |
| 250 | |
| 251 | #endif |
| 252 | |
| 253 | #ifdef DEBUG |
| 254 | |
| 255 | #define ISOLATE_INIT_DEBUG_ARRAY_LIST(V) \ |
| 256 | V(CommentStatistic, paged_space_comments_statistics, \ |
| 257 | CommentStatistic::kMaxComments + 1) |
| 258 | #else |
| 259 | |
| 260 | #define ISOLATE_INIT_DEBUG_ARRAY_LIST(V) |
| 261 | |
| 262 | #endif |
| 263 | |
| 264 | #ifdef ENABLE_LOGGING_AND_PROFILING |
| 265 | |
| 266 | #define ISOLATE_LOGGING_INIT_LIST(V) \ |
| 267 | V(CpuProfiler*, cpu_profiler, NULL) \ |
| 268 | V(HeapProfiler*, heap_profiler, NULL) |
| 269 | |
| 270 | #else |
| 271 | |
| 272 | #define ISOLATE_LOGGING_INIT_LIST(V) |
| 273 | |
| 274 | #endif |
| 275 | |
| 276 | #define ISOLATE_INIT_ARRAY_LIST(V) \ |
| 277 | /* SerializerDeserializer state. */ \ |
| 278 | V(Object*, serialize_partial_snapshot_cache, kPartialSnapshotCacheCapacity) \ |
| 279 | V(int, jsregexp_static_offsets_vector, kJSRegexpStaticOffsetsVectorSize) \ |
| 280 | V(int, bad_char_shift_table, kUC16AlphabetSize) \ |
| 281 | V(int, good_suffix_shift_table, (kBMMaxShift + 1)) \ |
| 282 | V(int, suffix_table, (kBMMaxShift + 1)) \ |
| 283 | ISOLATE_INIT_DEBUG_ARRAY_LIST(V) |
| 284 | |
| 285 | typedef List<HeapObject*, PreallocatedStorage> DebugObjectCache; |
| 286 | |
| 287 | #define ISOLATE_INIT_LIST(V) \ |
| 288 | /* AssertNoZoneAllocation state. */ \ |
| 289 | V(bool, zone_allow_allocation, true) \ |
| 290 | /* SerializerDeserializer state. */ \ |
| 291 | V(int, serialize_partial_snapshot_cache_length, 0) \ |
| 292 | /* Assembler state. */ \ |
| 293 | /* A previously allocated buffer of kMinimalBufferSize bytes, or NULL. */ \ |
| 294 | V(byte*, assembler_spare_buffer, NULL) \ |
| 295 | V(FatalErrorCallback, exception_behavior, NULL) \ |
| 296 | V(v8::Debug::MessageHandler, message_handler, NULL) \ |
| 297 | /* To distinguish the function templates, so that we can find them in the */ \ |
| 298 | /* function cache of the global context. */ \ |
| 299 | V(int, next_serial_number, 0) \ |
| 300 | V(ExternalReferenceRedirectorPointer*, external_reference_redirector, NULL) \ |
| 301 | V(bool, always_allow_natives_syntax, false) \ |
| 302 | /* Part of the state of liveedit. */ \ |
| 303 | V(FunctionInfoListener*, active_function_info_listener, NULL) \ |
| 304 | /* State for Relocatable. */ \ |
| 305 | V(Relocatable*, relocatable_top, NULL) \ |
| 306 | /* State for CodeEntry in profile-generator. */ \ |
| 307 | V(CodeGenerator*, current_code_generator, NULL) \ |
| 308 | V(bool, jump_target_compiling_deferred_code, false) \ |
| 309 | V(DebugObjectCache*, string_stream_debug_object_cache, NULL) \ |
| 310 | V(Object*, string_stream_current_security_token, NULL) \ |
| 311 | /* TODO(isolates): Release this on destruction? */ \ |
| 312 | V(int*, irregexp_interpreter_backtrack_stack_cache, NULL) \ |
| 313 | /* Serializer state. */ \ |
| 314 | V(ExternalReferenceTable*, external_reference_table, NULL) \ |
| 315 | /* AstNode state. */ \ |
| 316 | V(unsigned, ast_node_id, 0) \ |
| 317 | V(unsigned, ast_node_count, 0) \ |
| 318 | ISOLATE_PLATFORM_INIT_LIST(V) \ |
| 319 | ISOLATE_LOGGING_INIT_LIST(V) \ |
| 320 | ISOLATE_DEBUGGER_INIT_LIST(V) |
| 321 | |
| 322 | class Isolate { |
| 323 | // These forward declarations are required to make the friend declarations in |
| 324 | // PerIsolateThreadData work on some older versions of gcc. |
| 325 | class ThreadDataTable; |
| 326 | class EntryStackItem; |
| 327 | public: |
| 328 | ~Isolate(); |
| 329 | |
| 330 | typedef int ThreadId; |
| 331 | |
| 332 | // A thread has a PerIsolateThreadData instance for each isolate that it has |
| 333 | // entered. That instance is allocated when the isolate is initially entered |
| 334 | // and reused on subsequent entries. |
| 335 | class PerIsolateThreadData { |
| 336 | public: |
| 337 | PerIsolateThreadData(Isolate* isolate, ThreadId thread_id) |
| 338 | : isolate_(isolate), |
| 339 | thread_id_(thread_id), |
| 340 | stack_limit_(0), |
| 341 | thread_state_(NULL), |
| 342 | #if !defined(__arm__) && defined(V8_TARGET_ARCH_ARM) || \ |
| 343 | !defined(__mips__) && defined(V8_TARGET_ARCH_MIPS) |
| 344 | simulator_(NULL), |
| 345 | #endif |
| 346 | next_(NULL), |
| 347 | prev_(NULL) { } |
| 348 | Isolate* isolate() const { return isolate_; } |
| 349 | ThreadId thread_id() const { return thread_id_; } |
| 350 | void set_stack_limit(uintptr_t value) { stack_limit_ = value; } |
| 351 | uintptr_t stack_limit() const { return stack_limit_; } |
| 352 | ThreadState* thread_state() const { return thread_state_; } |
| 353 | void set_thread_state(ThreadState* value) { thread_state_ = value; } |
| 354 | |
| 355 | #if !defined(__arm__) && defined(V8_TARGET_ARCH_ARM) || \ |
| 356 | !defined(__mips__) && defined(V8_TARGET_ARCH_MIPS) |
| 357 | Simulator* simulator() const { return simulator_; } |
| 358 | void set_simulator(Simulator* simulator) { |
| 359 | simulator_ = simulator; |
| 360 | } |
| 361 | #endif |
| 362 | |
| 363 | bool Matches(Isolate* isolate, ThreadId thread_id) const { |
| 364 | return isolate_ == isolate && thread_id_ == thread_id; |
| 365 | } |
| 366 | |
| 367 | private: |
| 368 | Isolate* isolate_; |
| 369 | ThreadId thread_id_; |
| 370 | uintptr_t stack_limit_; |
| 371 | ThreadState* thread_state_; |
| 372 | |
| 373 | #if !defined(__arm__) && defined(V8_TARGET_ARCH_ARM) || \ |
| 374 | !defined(__mips__) && defined(V8_TARGET_ARCH_MIPS) |
| 375 | Simulator* simulator_; |
| 376 | #endif |
| 377 | |
| 378 | PerIsolateThreadData* next_; |
| 379 | PerIsolateThreadData* prev_; |
| 380 | |
| 381 | friend class Isolate; |
| 382 | friend class ThreadDataTable; |
| 383 | friend class EntryStackItem; |
| 384 | |
| 385 | DISALLOW_COPY_AND_ASSIGN(PerIsolateThreadData); |
| 386 | }; |
| 387 | |
| 388 | |
| 389 | enum AddressId { |
| 390 | #define C(name) k_##name, |
| 391 | ISOLATE_ADDRESS_LIST(C) |
| 392 | ISOLATE_ADDRESS_LIST_PROF(C) |
| 393 | #undef C |
| 394 | k_isolate_address_count |
| 395 | }; |
| 396 | |
| 397 | // Returns the PerIsolateThreadData for the current thread (or NULL if one is |
| 398 | // not currently set). |
| 399 | static PerIsolateThreadData* CurrentPerIsolateThreadData() { |
| 400 | return reinterpret_cast<PerIsolateThreadData*>( |
| 401 | Thread::GetThreadLocal(per_isolate_thread_data_key_)); |
| 402 | } |
| 403 | |
| 404 | // Returns the isolate inside which the current thread is running. |
| 405 | INLINE(static Isolate* Current()) { |
| 406 | Isolate* isolate = reinterpret_cast<Isolate*>( |
| 407 | Thread::GetExistingThreadLocal(isolate_key_)); |
| 408 | ASSERT(isolate != NULL); |
| 409 | return isolate; |
| 410 | } |
| 411 | |
| 412 | INLINE(static Isolate* UncheckedCurrent()) { |
| 413 | return reinterpret_cast<Isolate*>(Thread::GetThreadLocal(isolate_key_)); |
| 414 | } |
| 415 | |
| 416 | bool Init(Deserializer* des); |
| 417 | |
| 418 | bool IsInitialized() { return state_ == INITIALIZED; } |
| 419 | |
| 420 | // True if at least one thread Enter'ed this isolate. |
| 421 | bool IsInUse() { return entry_stack_ != NULL; } |
| 422 | |
| 423 | // Destroys the non-default isolates. |
| 424 | // Sets default isolate into "has_been_disposed" state rather then destroying, |
| 425 | // for legacy API reasons. |
| 426 | void TearDown(); |
| 427 | |
| 428 | bool IsDefaultIsolate() const { return this == default_isolate_; } |
| 429 | |
| 430 | // Ensures that process-wide resources and the default isolate have been |
| 431 | // allocated. It is only necessary to call this method in rare casses, for |
| 432 | // example if you are using V8 from within the body of a static initializer. |
| 433 | // Safe to call multiple times. |
| 434 | static void EnsureDefaultIsolate(); |
| 435 | |
| 436 | // Get the debugger from the default isolate. Preinitializes the |
| 437 | // default isolate if needed. |
| 438 | static Debugger* GetDefaultIsolateDebugger(); |
| 439 | |
| 440 | // Get the stack guard from the default isolate. Preinitializes the |
| 441 | // default isolate if needed. |
| 442 | static StackGuard* GetDefaultIsolateStackGuard(); |
| 443 | |
| 444 | // Returns the key used to store the pointer to the current isolate. |
| 445 | // Used internally for V8 threads that do not execute JavaScript but still |
| 446 | // are part of the domain of an isolate (like the context switcher). |
| 447 | static Thread::LocalStorageKey isolate_key() { |
| 448 | return isolate_key_; |
| 449 | } |
| 450 | |
| 451 | // Returns the key used to store process-wide thread IDs. |
| 452 | static Thread::LocalStorageKey thread_id_key() { |
| 453 | return thread_id_key_; |
| 454 | } |
| 455 | |
| 456 | // Atomically allocates a new thread ID. |
| 457 | static ThreadId AllocateThreadId(); |
| 458 | |
| 459 | // If a client attempts to create a Locker without specifying an isolate, |
| 460 | // we assume that the client is using legacy behavior. Set up the current |
| 461 | // thread to be inside the implicit isolate (or fail a check if we have |
| 462 | // switched to non-legacy behavior). |
| 463 | static void EnterDefaultIsolate(); |
| 464 | |
| 465 | // Debug. |
| 466 | // Mutex for serializing access to break control structures. |
| 467 | Mutex* break_access() { return break_access_; } |
| 468 | |
| 469 | Address get_address_from_id(AddressId id); |
| 470 | |
| 471 | // Access to top context (where the current function object was created). |
| 472 | Context* context() { return thread_local_top_.context_; } |
| 473 | void set_context(Context* context) { |
| 474 | thread_local_top_.context_ = context; |
| 475 | } |
| 476 | Context** context_address() { return &thread_local_top_.context_; } |
| 477 | |
| 478 | SaveContext* save_context() {return thread_local_top_.save_context_; } |
| 479 | void set_save_context(SaveContext* save) { |
| 480 | thread_local_top_.save_context_ = save; |
| 481 | } |
| 482 | |
| 483 | // Access to current thread id. |
| 484 | int thread_id() { return thread_local_top_.thread_id_; } |
| 485 | void set_thread_id(int id) { thread_local_top_.thread_id_ = id; } |
| 486 | |
| 487 | // Interface to pending exception. |
| 488 | MaybeObject* pending_exception() { |
| 489 | ASSERT(has_pending_exception()); |
| 490 | return thread_local_top_.pending_exception_; |
| 491 | } |
| 492 | bool external_caught_exception() { |
| 493 | return thread_local_top_.external_caught_exception_; |
| 494 | } |
| 495 | void set_pending_exception(MaybeObject* exception) { |
| 496 | thread_local_top_.pending_exception_ = exception; |
| 497 | } |
| 498 | void clear_pending_exception() { |
| 499 | thread_local_top_.pending_exception_ = heap_.the_hole_value(); |
| 500 | } |
| 501 | MaybeObject** pending_exception_address() { |
| 502 | return &thread_local_top_.pending_exception_; |
| 503 | } |
| 504 | bool has_pending_exception() { |
| 505 | return !thread_local_top_.pending_exception_->IsTheHole(); |
| 506 | } |
| 507 | void clear_pending_message() { |
| 508 | thread_local_top_.has_pending_message_ = false; |
| 509 | thread_local_top_.pending_message_ = NULL; |
| 510 | thread_local_top_.pending_message_obj_ = heap_.the_hole_value(); |
| 511 | thread_local_top_.pending_message_script_ = NULL; |
| 512 | } |
| 513 | v8::TryCatch* try_catch_handler() { |
| 514 | return thread_local_top_.TryCatchHandler(); |
| 515 | } |
| 516 | Address try_catch_handler_address() { |
| 517 | return thread_local_top_.try_catch_handler_address(); |
| 518 | } |
| 519 | bool* external_caught_exception_address() { |
| 520 | return &thread_local_top_.external_caught_exception_; |
| 521 | } |
| 522 | |
| 523 | MaybeObject** scheduled_exception_address() { |
| 524 | return &thread_local_top_.scheduled_exception_; |
| 525 | } |
| 526 | MaybeObject* scheduled_exception() { |
| 527 | ASSERT(has_scheduled_exception()); |
| 528 | return thread_local_top_.scheduled_exception_; |
| 529 | } |
| 530 | bool has_scheduled_exception() { |
| 531 | return !thread_local_top_.scheduled_exception_->IsTheHole(); |
| 532 | } |
| 533 | void clear_scheduled_exception() { |
| 534 | thread_local_top_.scheduled_exception_ = heap_.the_hole_value(); |
| 535 | } |
| 536 | |
| 537 | bool IsExternallyCaught(); |
| 538 | |
| 539 | bool is_catchable_by_javascript(MaybeObject* exception) { |
| 540 | return (exception != Failure::OutOfMemoryException()) && |
| 541 | (exception != heap()->termination_exception()); |
| 542 | } |
| 543 | |
| 544 | // JS execution stack (see frames.h). |
| 545 | static Address c_entry_fp(ThreadLocalTop* thread) { |
| 546 | return thread->c_entry_fp_; |
| 547 | } |
| 548 | static Address handler(ThreadLocalTop* thread) { return thread->handler_; } |
| 549 | |
| 550 | inline Address* c_entry_fp_address() { |
| 551 | return &thread_local_top_.c_entry_fp_; |
| 552 | } |
| 553 | inline Address* handler_address() { return &thread_local_top_.handler_; } |
| 554 | |
| 555 | #ifdef ENABLE_LOGGING_AND_PROFILING |
| 556 | // Bottom JS entry (see StackTracer::Trace in log.cc). |
| 557 | static Address js_entry_sp(ThreadLocalTop* thread) { |
| 558 | return thread->js_entry_sp_; |
| 559 | } |
| 560 | inline Address* js_entry_sp_address() { |
| 561 | return &thread_local_top_.js_entry_sp_; |
| 562 | } |
| 563 | #endif |
| 564 | |
| 565 | // Generated code scratch locations. |
| 566 | void* formal_count_address() { return &thread_local_top_.formal_count_; } |
| 567 | |
| 568 | // Returns the global object of the current context. It could be |
| 569 | // a builtin object, or a js global object. |
| 570 | Handle<GlobalObject> global() { |
| 571 | return Handle<GlobalObject>(context()->global()); |
| 572 | } |
| 573 | |
| 574 | // Returns the global proxy object of the current context. |
| 575 | Object* global_proxy() { |
| 576 | return context()->global_proxy(); |
| 577 | } |
| 578 | |
| 579 | Handle<JSBuiltinsObject> js_builtins_object() { |
| 580 | return Handle<JSBuiltinsObject>(thread_local_top_.context_->builtins()); |
| 581 | } |
| 582 | |
| 583 | static int ArchiveSpacePerThread() { return sizeof(ThreadLocalTop); } |
| 584 | void FreeThreadResources() { thread_local_top_.Free(); } |
| 585 | |
| 586 | // This method is called by the api after operations that may throw |
| 587 | // exceptions. If an exception was thrown and not handled by an external |
| 588 | // handler the exception is scheduled to be rethrown when we return to running |
| 589 | // JavaScript code. If an exception is scheduled true is returned. |
| 590 | bool OptionalRescheduleException(bool is_bottom_call); |
| 591 | |
| 592 | void SetCaptureStackTraceForUncaughtExceptions( |
| 593 | bool capture, |
| 594 | int frame_limit, |
| 595 | StackTrace::StackTraceOptions options); |
| 596 | |
| 597 | // Tells whether the current context has experienced an out of memory |
| 598 | // exception. |
| 599 | bool is_out_of_memory(); |
| 600 | |
| 601 | void PrintCurrentStackTrace(FILE* out); |
| 602 | void PrintStackTrace(FILE* out, char* thread_data); |
| 603 | void PrintStack(StringStream* accumulator); |
| 604 | void PrintStack(); |
| 605 | Handle<String> StackTraceString(); |
| 606 | Handle<JSArray> CaptureCurrentStackTrace( |
| 607 | int frame_limit, |
| 608 | StackTrace::StackTraceOptions options); |
| 609 | |
| 610 | // Returns if the top context may access the given global object. If |
| 611 | // the result is false, the pending exception is guaranteed to be |
| 612 | // set. |
| 613 | bool MayNamedAccess(JSObject* receiver, |
| 614 | Object* key, |
| 615 | v8::AccessType type); |
| 616 | bool MayIndexedAccess(JSObject* receiver, |
| 617 | uint32_t index, |
| 618 | v8::AccessType type); |
| 619 | |
| 620 | void SetFailedAccessCheckCallback(v8::FailedAccessCheckCallback callback); |
| 621 | void ReportFailedAccessCheck(JSObject* receiver, v8::AccessType type); |
| 622 | |
| 623 | // Exception throwing support. The caller should use the result |
| 624 | // of Throw() as its return value. |
| 625 | Failure* Throw(Object* exception, MessageLocation* location = NULL); |
| 626 | // Re-throw an exception. This involves no error reporting since |
| 627 | // error reporting was handled when the exception was thrown |
| 628 | // originally. |
| 629 | Failure* ReThrow(MaybeObject* exception, MessageLocation* location = NULL); |
| 630 | void ScheduleThrow(Object* exception); |
| 631 | void ReportPendingMessages(); |
| 632 | Failure* ThrowIllegalOperation(); |
| 633 | |
| 634 | // Promote a scheduled exception to pending. Asserts has_scheduled_exception. |
| 635 | Failure* PromoteScheduledException(); |
| 636 | void DoThrow(MaybeObject* exception, |
| 637 | MessageLocation* location, |
| 638 | const char* message); |
| 639 | // Checks if exception should be reported and finds out if it's |
| 640 | // caught externally. |
| 641 | bool ShouldReportException(bool* can_be_caught_externally, |
| 642 | bool catchable_by_javascript); |
| 643 | |
| 644 | // Attempts to compute the current source location, storing the |
| 645 | // result in the target out parameter. |
| 646 | void ComputeLocation(MessageLocation* target); |
| 647 | |
| 648 | // Override command line flag. |
| 649 | void TraceException(bool flag); |
| 650 | |
| 651 | // Out of resource exception helpers. |
| 652 | Failure* StackOverflow(); |
| 653 | Failure* TerminateExecution(); |
| 654 | |
| 655 | // Administration |
| 656 | void Iterate(ObjectVisitor* v); |
| 657 | void Iterate(ObjectVisitor* v, ThreadLocalTop* t); |
| 658 | char* Iterate(ObjectVisitor* v, char* t); |
| 659 | void IterateThread(ThreadVisitor* v); |
| 660 | void IterateThread(ThreadVisitor* v, char* t); |
| 661 | |
| 662 | |
| 663 | // Returns the current global context. |
| 664 | Handle<Context> global_context(); |
| 665 | |
| 666 | // Returns the global context of the calling JavaScript code. That |
| 667 | // is, the global context of the top-most JavaScript frame. |
| 668 | Handle<Context> GetCallingGlobalContext(); |
| 669 | |
| 670 | void RegisterTryCatchHandler(v8::TryCatch* that); |
| 671 | void UnregisterTryCatchHandler(v8::TryCatch* that); |
| 672 | |
| 673 | char* ArchiveThread(char* to); |
| 674 | char* RestoreThread(char* from); |
| 675 | |
| 676 | static const char* const kStackOverflowMessage; |
| 677 | |
| 678 | static const int kUC16AlphabetSize = 256; // See StringSearchBase. |
| 679 | static const int kBMMaxShift = 250; // See StringSearchBase. |
| 680 | |
| 681 | // Accessors. |
| 682 | #define GLOBAL_ACCESSOR(type, name, initialvalue) \ |
| 683 | inline type name() const { \ |
| 684 | ASSERT(OFFSET_OF(Isolate, name##_) == name##_debug_offset_); \ |
| 685 | return name##_; \ |
| 686 | } \ |
| 687 | inline void set_##name(type value) { \ |
| 688 | ASSERT(OFFSET_OF(Isolate, name##_) == name##_debug_offset_); \ |
| 689 | name##_ = value; \ |
| 690 | } |
| 691 | ISOLATE_INIT_LIST(GLOBAL_ACCESSOR) |
| 692 | #undef GLOBAL_ACCESSOR |
| 693 | |
| 694 | #define GLOBAL_ARRAY_ACCESSOR(type, name, length) \ |
| 695 | inline type* name() { \ |
| 696 | ASSERT(OFFSET_OF(Isolate, name##_) == name##_debug_offset_); \ |
| 697 | return &(name##_)[0]; \ |
| 698 | } |
| 699 | ISOLATE_INIT_ARRAY_LIST(GLOBAL_ARRAY_ACCESSOR) |
| 700 | #undef GLOBAL_ARRAY_ACCESSOR |
| 701 | |
| 702 | #define GLOBAL_CONTEXT_FIELD_ACCESSOR(index, type, name) \ |
| 703 | Handle<type> name() { \ |
| 704 | return Handle<type>(context()->global_context()->name()); \ |
| 705 | } |
| 706 | GLOBAL_CONTEXT_FIELDS(GLOBAL_CONTEXT_FIELD_ACCESSOR) |
| 707 | #undef GLOBAL_CONTEXT_FIELD_ACCESSOR |
| 708 | |
| 709 | Bootstrapper* bootstrapper() { return bootstrapper_; } |
| 710 | Counters* counters() { return counters_; } |
| 711 | // TODO(isolates): Having CPU features per isolate is probably too |
| 712 | // flexible. We only really need to have the set of currently |
| 713 | // enabled features for asserts in DEBUG builds. |
| 714 | CpuFeatures* cpu_features() { return cpu_features_; } |
| 715 | CodeRange* code_range() { return code_range_; } |
| 716 | RuntimeProfiler* runtime_profiler() { return runtime_profiler_; } |
| 717 | CompilationCache* compilation_cache() { return compilation_cache_; } |
| 718 | Logger* logger() { return logger_; } |
| 719 | StackGuard* stack_guard() { return &stack_guard_; } |
| 720 | Heap* heap() { return &heap_; } |
| 721 | StatsTable* stats_table() { return stats_table_; } |
| 722 | StubCache* stub_cache() { return stub_cache_; } |
| 723 | DeoptimizerData* deoptimizer_data() { return deoptimizer_data_; } |
| 724 | ThreadLocalTop* thread_local_top() { return &thread_local_top_; } |
| 725 | |
| 726 | TranscendentalCache* transcendental_cache() const { |
| 727 | return transcendental_cache_; |
| 728 | } |
| 729 | |
| 730 | MemoryAllocator* memory_allocator() { |
| 731 | return memory_allocator_; |
| 732 | } |
| 733 | |
| 734 | KeyedLookupCache* keyed_lookup_cache() { |
| 735 | return keyed_lookup_cache_; |
| 736 | } |
| 737 | |
| 738 | ContextSlotCache* context_slot_cache() { |
| 739 | return context_slot_cache_; |
| 740 | } |
| 741 | |
| 742 | DescriptorLookupCache* descriptor_lookup_cache() { |
| 743 | return descriptor_lookup_cache_; |
| 744 | } |
| 745 | |
| 746 | v8::ImplementationUtilities::HandleScopeData* handle_scope_data() { |
| 747 | return &handle_scope_data_; |
| 748 | } |
| 749 | HandleScopeImplementer* handle_scope_implementer() { |
| 750 | ASSERT(handle_scope_implementer_); |
| 751 | return handle_scope_implementer_; |
| 752 | } |
| 753 | Zone* zone() { return &zone_; } |
| 754 | |
| 755 | ScannerConstants* scanner_constants() { |
| 756 | return scanner_constants_; |
| 757 | } |
| 758 | |
| 759 | PcToCodeCache* pc_to_code_cache() { return pc_to_code_cache_; } |
| 760 | |
| 761 | StringInputBuffer* write_input_buffer() { return write_input_buffer_; } |
| 762 | |
| 763 | GlobalHandles* global_handles() { return global_handles_; } |
| 764 | |
| 765 | ThreadManager* thread_manager() { return thread_manager_; } |
| 766 | |
| 767 | ContextSwitcher* context_switcher() { return context_switcher_; } |
| 768 | |
| 769 | void set_context_switcher(ContextSwitcher* switcher) { |
| 770 | context_switcher_ = switcher; |
| 771 | } |
| 772 | |
| 773 | StringTracker* string_tracker() { return string_tracker_; } |
| 774 | |
| 775 | unibrow::Mapping<unibrow::Ecma262UnCanonicalize>* jsregexp_uncanonicalize() { |
| 776 | return &jsregexp_uncanonicalize_; |
| 777 | } |
| 778 | |
| 779 | unibrow::Mapping<unibrow::CanonicalizationRange>* jsregexp_canonrange() { |
| 780 | return &jsregexp_canonrange_; |
| 781 | } |
| 782 | |
| 783 | StringInputBuffer* objects_string_compare_buffer_a() { |
| 784 | return &objects_string_compare_buffer_a_; |
| 785 | } |
| 786 | |
| 787 | StringInputBuffer* objects_string_compare_buffer_b() { |
| 788 | return &objects_string_compare_buffer_b_; |
| 789 | } |
| 790 | |
| 791 | StaticResource<StringInputBuffer>* objects_string_input_buffer() { |
| 792 | return &objects_string_input_buffer_; |
| 793 | } |
| 794 | |
| 795 | AstSentinels* ast_sentinels() { return ast_sentinels_; } |
| 796 | |
| 797 | RuntimeState* runtime_state() { return &runtime_state_; } |
| 798 | |
| 799 | StringInputBuffer* liveedit_compare_substrings_buf1() { |
| 800 | return &liveedit_compare_substrings_buf1_; |
| 801 | } |
| 802 | |
| 803 | StringInputBuffer* liveedit_compare_substrings_buf2() { |
| 804 | return &liveedit_compare_substrings_buf2_; |
| 805 | } |
| 806 | |
| 807 | StaticResource<SafeStringInputBuffer>* compiler_safe_string_input_buffer() { |
| 808 | return &compiler_safe_string_input_buffer_; |
| 809 | } |
| 810 | |
| 811 | Builtins* builtins() { return &builtins_; } |
| 812 | |
| 813 | unibrow::Mapping<unibrow::Ecma262Canonicalize>* |
| 814 | regexp_macro_assembler_canonicalize() { |
| 815 | return ®exp_macro_assembler_canonicalize_; |
| 816 | } |
| 817 | |
| 818 | RegExpStack* regexp_stack() { return regexp_stack_; } |
| 819 | |
| 820 | unibrow::Mapping<unibrow::Ecma262Canonicalize>* |
| 821 | interp_canonicalize_mapping() { |
| 822 | return &interp_canonicalize_mapping_; |
| 823 | } |
| 824 | |
| 825 | ZoneObjectList* frame_element_constant_list() { |
| 826 | return &frame_element_constant_list_; |
| 827 | } |
| 828 | |
| 829 | ZoneObjectList* result_constant_list() { |
| 830 | return &result_constant_list_; |
| 831 | } |
| 832 | |
| 833 | void* PreallocatedStorageNew(size_t size); |
| 834 | void PreallocatedStorageDelete(void* p); |
| 835 | void PreallocatedStorageInit(size_t size); |
| 836 | |
| 837 | #ifdef ENABLE_DEBUGGER_SUPPORT |
| 838 | Debugger* debugger() { return debugger_; } |
| 839 | Debug* debug() { return debug_; } |
| 840 | #endif |
| 841 | |
| 842 | #ifdef ENABLE_LOGGING_AND_PROFILING |
| 843 | ProducerHeapProfile* producer_heap_profile() { |
| 844 | return producer_heap_profile_; |
| 845 | } |
| 846 | #endif |
| 847 | |
| 848 | #ifdef DEBUG |
| 849 | HistogramInfo* heap_histograms() { return heap_histograms_; } |
| 850 | |
| 851 | JSObject::SpillInformation* js_spill_information() { |
| 852 | return &js_spill_information_; |
| 853 | } |
| 854 | |
| 855 | int* code_kind_statistics() { return code_kind_statistics_; } |
| 856 | #endif |
| 857 | |
| 858 | #if defined(V8_TARGET_ARCH_ARM) && !defined(__arm__) || \ |
| 859 | defined(V8_TARGET_ARCH_MIPS) && !defined(__mips__) |
| 860 | bool simulator_initialized() { return simulator_initialized_; } |
| 861 | void set_simulator_initialized(bool initialized) { |
| 862 | simulator_initialized_ = initialized; |
| 863 | } |
| 864 | |
| 865 | HashMap* simulator_i_cache() { return simulator_i_cache_; } |
| 866 | void set_simulator_i_cache(HashMap* hash_map) { |
| 867 | simulator_i_cache_ = hash_map; |
| 868 | } |
| 869 | |
| 870 | Redirection* simulator_redirection() { |
| 871 | return simulator_redirection_; |
| 872 | } |
| 873 | void set_simulator_redirection(Redirection* redirection) { |
| 874 | simulator_redirection_ = redirection; |
| 875 | } |
| 876 | #endif |
| 877 | |
| 878 | Factory* factory() { return reinterpret_cast<Factory*>(this); } |
| 879 | |
| 880 | // SerializerDeserializer state. |
| 881 | static const int kPartialSnapshotCacheCapacity = 1400; |
| 882 | |
| 883 | static const int kJSRegexpStaticOffsetsVectorSize = 50; |
| 884 | |
| 885 | #ifdef ENABLE_LOGGING_AND_PROFILING |
| 886 | Address external_callback() { |
| 887 | return thread_local_top_.external_callback_; |
| 888 | } |
| 889 | void set_external_callback(Address callback) { |
| 890 | thread_local_top_.external_callback_ = callback; |
| 891 | } |
| 892 | #endif |
| 893 | |
| 894 | #ifdef ENABLE_VMSTATE_TRACKING |
| 895 | StateTag current_vm_state() { |
| 896 | return thread_local_top_.current_vm_state_; |
| 897 | } |
| 898 | |
| 899 | void SetCurrentVMState(StateTag state) { |
| 900 | if (RuntimeProfiler::IsEnabled()) { |
| 901 | if (state == JS) { |
| 902 | // JS or non-JS -> JS transition. |
| 903 | RuntimeProfiler::IsolateEnteredJS(this); |
| 904 | } else if (thread_local_top_.current_vm_state_ == JS) { |
| 905 | // JS -> non-JS transition. |
| 906 | ASSERT(RuntimeProfiler::IsSomeIsolateInJS()); |
| 907 | RuntimeProfiler::IsolateExitedJS(this); |
| 908 | } |
| 909 | } |
| 910 | thread_local_top_.current_vm_state_ = state; |
| 911 | } |
| 912 | #endif |
| 913 | |
| 914 | void ResetEagerOptimizingData(); |
| 915 | |
| 916 | private: |
| 917 | Isolate(); |
| 918 | |
| 919 | // The per-process lock should be acquired before the ThreadDataTable is |
| 920 | // modified. |
| 921 | class ThreadDataTable { |
| 922 | public: |
| 923 | ThreadDataTable(); |
| 924 | ~ThreadDataTable(); |
| 925 | |
| 926 | PerIsolateThreadData* Lookup(Isolate* isolate, ThreadId thread_id); |
| 927 | void Insert(PerIsolateThreadData* data); |
| 928 | void Remove(Isolate* isolate, ThreadId thread_id); |
| 929 | void Remove(PerIsolateThreadData* data); |
| 930 | |
| 931 | private: |
| 932 | PerIsolateThreadData* list_; |
| 933 | }; |
| 934 | |
| 935 | // These items form a stack synchronously with threads Enter'ing and Exit'ing |
| 936 | // the Isolate. The top of the stack points to a thread which is currently |
| 937 | // running the Isolate. When the stack is empty, the Isolate is considered |
| 938 | // not entered by any thread and can be Disposed. |
| 939 | // If the same thread enters the Isolate more then once, the entry_count_ |
| 940 | // is incremented rather then a new item pushed to the stack. |
| 941 | class EntryStackItem { |
| 942 | public: |
| 943 | EntryStackItem(PerIsolateThreadData* previous_thread_data, |
| 944 | Isolate* previous_isolate, |
| 945 | EntryStackItem* previous_item) |
| 946 | : entry_count(1), |
| 947 | previous_thread_data(previous_thread_data), |
| 948 | previous_isolate(previous_isolate), |
| 949 | previous_item(previous_item) { } |
| 950 | |
| 951 | int entry_count; |
| 952 | PerIsolateThreadData* previous_thread_data; |
| 953 | Isolate* previous_isolate; |
| 954 | EntryStackItem* previous_item; |
| 955 | |
| 956 | DISALLOW_COPY_AND_ASSIGN(EntryStackItem); |
| 957 | }; |
| 958 | |
| 959 | // This mutex protects highest_thread_id_, thread_data_table_ and |
| 960 | // default_isolate_. |
| 961 | static Mutex* process_wide_mutex_; |
| 962 | |
| 963 | static Thread::LocalStorageKey per_isolate_thread_data_key_; |
| 964 | static Thread::LocalStorageKey isolate_key_; |
| 965 | static Thread::LocalStorageKey thread_id_key_; |
| 966 | static Isolate* default_isolate_; |
| 967 | static ThreadDataTable* thread_data_table_; |
| 968 | static ThreadId highest_thread_id_; |
| 969 | |
| 970 | bool PreInit(); |
| 971 | |
| 972 | void Deinit(); |
| 973 | |
| 974 | static void SetIsolateThreadLocals(Isolate* isolate, |
| 975 | PerIsolateThreadData* data); |
| 976 | |
| 977 | enum State { |
| 978 | UNINITIALIZED, // Some components may not have been allocated. |
| 979 | PREINITIALIZED, // Components have been allocated but not initialized. |
| 980 | INITIALIZED // All components are fully initialized. |
| 981 | }; |
| 982 | |
| 983 | State state_; |
| 984 | EntryStackItem* entry_stack_; |
| 985 | |
| 986 | // Allocate and insert PerIsolateThreadData into the ThreadDataTable |
| 987 | // (regardless of whether such data already exists). |
| 988 | PerIsolateThreadData* AllocatePerIsolateThreadData(ThreadId thread_id); |
| 989 | |
| 990 | // Find the PerThread for this particular (isolate, thread) combination. |
| 991 | // If one does not yet exist, allocate a new one. |
| 992 | PerIsolateThreadData* FindOrAllocatePerThreadDataForThisThread(); |
| 993 | |
| 994 | // PreInits and returns a default isolate. Needed when a new thread tries |
| 995 | // to create a Locker for the first time (the lock itself is in the isolate). |
| 996 | static Isolate* GetDefaultIsolateForLocking(); |
| 997 | |
| 998 | // Initializes the current thread to run this Isolate. |
| 999 | // Not thread-safe. Multiple threads should not Enter/Exit the same isolate |
| 1000 | // at the same time, this should be prevented using external locking. |
| 1001 | void Enter(); |
| 1002 | |
| 1003 | // Exits the current thread. The previosuly entered Isolate is restored |
| 1004 | // for the thread. |
| 1005 | // Not thread-safe. Multiple threads should not Enter/Exit the same isolate |
| 1006 | // at the same time, this should be prevented using external locking. |
| 1007 | void Exit(); |
| 1008 | |
| 1009 | void PreallocatedMemoryThreadStart(); |
| 1010 | void PreallocatedMemoryThreadStop(); |
| 1011 | void InitializeThreadLocal(); |
| 1012 | |
| 1013 | void PrintStackTrace(FILE* out, ThreadLocalTop* thread); |
| 1014 | void MarkCompactPrologue(bool is_compacting, |
| 1015 | ThreadLocalTop* archived_thread_data); |
| 1016 | void MarkCompactEpilogue(bool is_compacting, |
| 1017 | ThreadLocalTop* archived_thread_data); |
| 1018 | |
| 1019 | void FillCache(); |
| 1020 | |
| 1021 | int stack_trace_nesting_level_; |
| 1022 | StringStream* incomplete_message_; |
| 1023 | // The preallocated memory thread singleton. |
| 1024 | PreallocatedMemoryThread* preallocated_memory_thread_; |
| 1025 | Address isolate_addresses_[k_isolate_address_count + 1]; // NOLINT |
| 1026 | NoAllocationStringAllocator* preallocated_message_space_; |
| 1027 | |
| 1028 | Bootstrapper* bootstrapper_; |
| 1029 | RuntimeProfiler* runtime_profiler_; |
| 1030 | CompilationCache* compilation_cache_; |
| 1031 | Counters* counters_; |
| 1032 | CpuFeatures* cpu_features_; |
| 1033 | CodeRange* code_range_; |
| 1034 | Mutex* break_access_; |
| 1035 | Heap heap_; |
| 1036 | Logger* logger_; |
| 1037 | StackGuard stack_guard_; |
| 1038 | StatsTable* stats_table_; |
| 1039 | StubCache* stub_cache_; |
| 1040 | DeoptimizerData* deoptimizer_data_; |
| 1041 | ThreadLocalTop thread_local_top_; |
| 1042 | bool capture_stack_trace_for_uncaught_exceptions_; |
| 1043 | int stack_trace_for_uncaught_exceptions_frame_limit_; |
| 1044 | StackTrace::StackTraceOptions stack_trace_for_uncaught_exceptions_options_; |
| 1045 | TranscendentalCache* transcendental_cache_; |
| 1046 | MemoryAllocator* memory_allocator_; |
| 1047 | KeyedLookupCache* keyed_lookup_cache_; |
| 1048 | ContextSlotCache* context_slot_cache_; |
| 1049 | DescriptorLookupCache* descriptor_lookup_cache_; |
| 1050 | v8::ImplementationUtilities::HandleScopeData handle_scope_data_; |
| 1051 | HandleScopeImplementer* handle_scope_implementer_; |
| 1052 | ScannerConstants* scanner_constants_; |
| 1053 | Zone zone_; |
| 1054 | PreallocatedStorage in_use_list_; |
| 1055 | PreallocatedStorage free_list_; |
| 1056 | bool preallocated_storage_preallocated_; |
| 1057 | PcToCodeCache* pc_to_code_cache_; |
| 1058 | StringInputBuffer* write_input_buffer_; |
| 1059 | GlobalHandles* global_handles_; |
| 1060 | ContextSwitcher* context_switcher_; |
| 1061 | ThreadManager* thread_manager_; |
| 1062 | AstSentinels* ast_sentinels_; |
| 1063 | RuntimeState runtime_state_; |
| 1064 | StringInputBuffer liveedit_compare_substrings_buf1_; |
| 1065 | StringInputBuffer liveedit_compare_substrings_buf2_; |
| 1066 | StaticResource<SafeStringInputBuffer> compiler_safe_string_input_buffer_; |
| 1067 | Builtins builtins_; |
| 1068 | StringTracker* string_tracker_; |
| 1069 | unibrow::Mapping<unibrow::Ecma262UnCanonicalize> jsregexp_uncanonicalize_; |
| 1070 | unibrow::Mapping<unibrow::CanonicalizationRange> jsregexp_canonrange_; |
| 1071 | StringInputBuffer objects_string_compare_buffer_a_; |
| 1072 | StringInputBuffer objects_string_compare_buffer_b_; |
| 1073 | StaticResource<StringInputBuffer> objects_string_input_buffer_; |
| 1074 | unibrow::Mapping<unibrow::Ecma262Canonicalize> |
| 1075 | regexp_macro_assembler_canonicalize_; |
| 1076 | RegExpStack* regexp_stack_; |
| 1077 | unibrow::Mapping<unibrow::Ecma262Canonicalize> interp_canonicalize_mapping_; |
| 1078 | ZoneObjectList frame_element_constant_list_; |
| 1079 | ZoneObjectList result_constant_list_; |
| 1080 | |
| 1081 | #if defined(V8_TARGET_ARCH_ARM) && !defined(__arm__) || \ |
| 1082 | defined(V8_TARGET_ARCH_MIPS) && !defined(__mips__) |
| 1083 | bool simulator_initialized_; |
| 1084 | HashMap* simulator_i_cache_; |
| 1085 | Redirection* simulator_redirection_; |
| 1086 | #endif |
| 1087 | |
| 1088 | #ifdef DEBUG |
| 1089 | // A static array of histogram info for each type. |
| 1090 | HistogramInfo heap_histograms_[LAST_TYPE + 1]; |
| 1091 | JSObject::SpillInformation js_spill_information_; |
| 1092 | int code_kind_statistics_[Code::NUMBER_OF_KINDS]; |
| 1093 | #endif |
| 1094 | |
| 1095 | #ifdef ENABLE_DEBUGGER_SUPPORT |
| 1096 | Debugger* debugger_; |
| 1097 | Debug* debug_; |
| 1098 | #endif |
| 1099 | |
| 1100 | #ifdef ENABLE_LOGGING_AND_PROFILING |
| 1101 | ProducerHeapProfile* producer_heap_profile_; |
| 1102 | #endif |
| 1103 | |
| 1104 | #define GLOBAL_BACKING_STORE(type, name, initialvalue) \ |
| 1105 | type name##_; |
| 1106 | ISOLATE_INIT_LIST(GLOBAL_BACKING_STORE) |
| 1107 | #undef GLOBAL_BACKING_STORE |
| 1108 | |
| 1109 | #define GLOBAL_ARRAY_BACKING_STORE(type, name, length) \ |
| 1110 | type name##_[length]; |
| 1111 | ISOLATE_INIT_ARRAY_LIST(GLOBAL_ARRAY_BACKING_STORE) |
| 1112 | #undef GLOBAL_ARRAY_BACKING_STORE |
| 1113 | |
| 1114 | #ifdef DEBUG |
| 1115 | // This class is huge and has a number of fields controlled by |
| 1116 | // preprocessor defines. Make sure the offsets of these fields agree |
| 1117 | // between compilation units. |
| 1118 | #define ISOLATE_FIELD_OFFSET(type, name, ignored) \ |
| 1119 | static const intptr_t name##_debug_offset_; |
| 1120 | ISOLATE_INIT_LIST(ISOLATE_FIELD_OFFSET) |
| 1121 | ISOLATE_INIT_ARRAY_LIST(ISOLATE_FIELD_OFFSET) |
| 1122 | #undef ISOLATE_FIELD_OFFSET |
| 1123 | #endif |
| 1124 | |
| 1125 | friend class ExecutionAccess; |
| 1126 | friend class IsolateInitializer; |
| 1127 | friend class v8::Isolate; |
| 1128 | friend class v8::Locker; |
| 1129 | |
| 1130 | DISALLOW_COPY_AND_ASSIGN(Isolate); |
| 1131 | }; |
| 1132 | |
| 1133 | |
| 1134 | // If the GCC version is 4.1.x or 4.2.x an additional field is added to the |
| 1135 | // class as a work around for a bug in the generated code found with these |
| 1136 | // versions of GCC. See V8 issue 122 for details. |
| 1137 | class SaveContext BASE_EMBEDDED { |
| 1138 | public: |
| 1139 | explicit SaveContext(Isolate* isolate) : prev_(isolate->save_context()) { |
| 1140 | if (isolate->context() != NULL) { |
| 1141 | context_ = Handle<Context>(isolate->context()); |
| 1142 | #if __GNUC_VERSION__ >= 40100 && __GNUC_VERSION__ < 40300 |
| 1143 | dummy_ = Handle<Context>(isolate->context()); |
| 1144 | #endif |
| 1145 | } |
| 1146 | isolate->set_save_context(this); |
| 1147 | |
| 1148 | // If there is no JS frame under the current C frame, use the value 0. |
| 1149 | JavaScriptFrameIterator it; |
| 1150 | js_sp_ = it.done() ? 0 : it.frame()->sp(); |
| 1151 | } |
| 1152 | |
| 1153 | ~SaveContext() { |
| 1154 | if (context_.is_null()) { |
| 1155 | Isolate* isolate = Isolate::Current(); |
| 1156 | isolate->set_context(NULL); |
| 1157 | isolate->set_save_context(prev_); |
| 1158 | } else { |
| 1159 | Isolate* isolate = context_->GetIsolate(); |
| 1160 | isolate->set_context(*context_); |
| 1161 | isolate->set_save_context(prev_); |
| 1162 | } |
| 1163 | } |
| 1164 | |
| 1165 | Handle<Context> context() { return context_; } |
| 1166 | SaveContext* prev() { return prev_; } |
| 1167 | |
| 1168 | // Returns true if this save context is below a given JavaScript frame. |
| 1169 | bool below(JavaScriptFrame* frame) { |
| 1170 | return (js_sp_ == 0) || (frame->sp() < js_sp_); |
| 1171 | } |
| 1172 | |
| 1173 | private: |
| 1174 | Handle<Context> context_; |
| 1175 | #if __GNUC_VERSION__ >= 40100 && __GNUC_VERSION__ < 40300 |
| 1176 | Handle<Context> dummy_; |
| 1177 | #endif |
| 1178 | SaveContext* prev_; |
| 1179 | Address js_sp_; // The top JS frame's sp when saving context. |
| 1180 | }; |
| 1181 | |
| 1182 | |
| 1183 | class AssertNoContextChange BASE_EMBEDDED { |
| 1184 | #ifdef DEBUG |
| 1185 | public: |
| 1186 | AssertNoContextChange() : |
| 1187 | scope_(Isolate::Current()), |
| 1188 | context_(Isolate::Current()->context(), Isolate::Current()) { |
| 1189 | } |
| 1190 | |
| 1191 | ~AssertNoContextChange() { |
| 1192 | ASSERT(Isolate::Current()->context() == *context_); |
| 1193 | } |
| 1194 | |
| 1195 | private: |
| 1196 | HandleScope scope_; |
| 1197 | Handle<Context> context_; |
| 1198 | #else |
| 1199 | public: |
| 1200 | AssertNoContextChange() { } |
| 1201 | #endif |
| 1202 | }; |
| 1203 | |
| 1204 | |
| 1205 | class ExecutionAccess BASE_EMBEDDED { |
| 1206 | public: |
| 1207 | explicit ExecutionAccess(Isolate* isolate) : isolate_(isolate) { |
| 1208 | Lock(isolate); |
| 1209 | } |
| 1210 | ~ExecutionAccess() { Unlock(isolate_); } |
| 1211 | |
| 1212 | static void Lock(Isolate* isolate) { isolate->break_access_->Lock(); } |
| 1213 | static void Unlock(Isolate* isolate) { isolate->break_access_->Unlock(); } |
| 1214 | |
| 1215 | static bool TryLock(Isolate* isolate) { |
| 1216 | return isolate->break_access_->TryLock(); |
| 1217 | } |
| 1218 | |
| 1219 | private: |
| 1220 | Isolate* isolate_; |
| 1221 | }; |
| 1222 | |
| 1223 | |
| 1224 | // Support for checking for stack-overflows in C++ code. |
| 1225 | class StackLimitCheck BASE_EMBEDDED { |
| 1226 | public: |
| 1227 | explicit StackLimitCheck(Isolate* isolate) : isolate_(isolate) { } |
| 1228 | |
| 1229 | bool HasOverflowed() const { |
| 1230 | StackGuard* stack_guard = isolate_->stack_guard(); |
| 1231 | // Stack has overflowed in C++ code only if stack pointer exceeds the C++ |
| 1232 | // stack guard and the limits are not set to interrupt values. |
| 1233 | // TODO(214): Stack overflows are ignored if a interrupt is pending. This |
| 1234 | // code should probably always use the initial C++ limit. |
| 1235 | return (reinterpret_cast<uintptr_t>(this) < stack_guard->climit()) && |
| 1236 | stack_guard->IsStackOverflow(); |
| 1237 | } |
| 1238 | private: |
| 1239 | Isolate* isolate_; |
| 1240 | }; |
| 1241 | |
| 1242 | |
| 1243 | // Support for temporarily postponing interrupts. When the outermost |
| 1244 | // postpone scope is left the interrupts will be re-enabled and any |
| 1245 | // interrupts that occurred while in the scope will be taken into |
| 1246 | // account. |
| 1247 | class PostponeInterruptsScope BASE_EMBEDDED { |
| 1248 | public: |
| 1249 | explicit PostponeInterruptsScope(Isolate* isolate) |
| 1250 | : stack_guard_(isolate->stack_guard()) { |
| 1251 | stack_guard_->thread_local_.postpone_interrupts_nesting_++; |
| 1252 | stack_guard_->DisableInterrupts(); |
| 1253 | } |
| 1254 | |
| 1255 | ~PostponeInterruptsScope() { |
| 1256 | if (--stack_guard_->thread_local_.postpone_interrupts_nesting_ == 0) { |
| 1257 | stack_guard_->EnableInterrupts(); |
| 1258 | } |
| 1259 | } |
| 1260 | private: |
| 1261 | StackGuard* stack_guard_; |
| 1262 | }; |
| 1263 | |
| 1264 | |
| 1265 | // Temporary macros for accessing current isolate and its subobjects. |
| 1266 | // They provide better readability, especially when used a lot in the code. |
| 1267 | #define HEAP (v8::internal::Isolate::Current()->heap()) |
| 1268 | #define FACTORY (v8::internal::Isolate::Current()->factory()) |
| 1269 | #define ISOLATE (v8::internal::Isolate::Current()) |
| 1270 | #define ZONE (v8::internal::Isolate::Current()->zone()) |
| 1271 | #define LOGGER (v8::internal::Isolate::Current()->logger()) |
| 1272 | |
| 1273 | |
| 1274 | // Tells whether the global context is marked with out of memory. |
| 1275 | inline bool Context::has_out_of_memory() { |
| 1276 | return global_context()->out_of_memory()->IsTrue(); |
| 1277 | } |
| 1278 | |
| 1279 | |
| 1280 | // Mark the global context with out of memory. |
| 1281 | inline void Context::mark_out_of_memory() { |
| 1282 | global_context()->set_out_of_memory(HEAP->true_value()); |
| 1283 | } |
| 1284 | |
| 1285 | |
| 1286 | // Temporary macro to be used to flag definitions that are indeed static |
| 1287 | // and not per-isolate. (It would be great to be able to grep for [static]!) |
| 1288 | #define RLYSTC static |
| 1289 | |
| 1290 | |
| 1291 | // Temporary macro to be used to flag classes that should be static. |
| 1292 | #define STATIC_CLASS class |
| 1293 | |
| 1294 | |
| 1295 | // Temporary macro to be used to flag classes that are completely converted |
| 1296 | // to be isolate-friendly. Their mix of static/nonstatic methods/fields is |
| 1297 | // correct. |
| 1298 | #define ISOLATED_CLASS class |
| 1299 | |
| 1300 | } } // namespace v8::internal |
| 1301 | |
| 1302 | // TODO(isolates): Get rid of these -inl.h includes and place them only where |
| 1303 | // they're needed. |
| 1304 | #include "allocation-inl.h" |
| 1305 | #include "zone-inl.h" |
| 1306 | #include "frames-inl.h" |
| 1307 | |
| 1308 | #endif // V8_ISOLATE_H_ |