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Diffstat (limited to 'src/3rdparty/v8/src/isolate.h')
| -rw-r--r-- | src/3rdparty/v8/src/isolate.h | 1306 |
1 files changed, 1306 insertions, 0 deletions
diff --git a/src/3rdparty/v8/src/isolate.h b/src/3rdparty/v8/src/isolate.h new file mode 100644 index 0000000..638658b --- /dev/null +++ b/src/3rdparty/v8/src/isolate.h @@ -0,0 +1,1306 @@ +// Copyright 2010 the V8 project authors. All rights reserved. +// Redistribution and use in source and binary forms, with or without +// modification, are permitted provided that the following conditions are +// met: +// +// * Redistributions of source code must retain the above copyright +// notice, this list of conditions and the following disclaimer. +// * Redistributions in binary form must reproduce the above +// copyright notice, this list of conditions and the following +// disclaimer in the documentation and/or other materials provided +// with the distribution. +// * Neither the name of Google Inc. nor the names of its +// contributors may be used to endorse or promote products derived +// from this software without specific prior written permission. +// +// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS +// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT +// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR +// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT +// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, +// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT +// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, +// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY +// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT +// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE +// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + +#ifndef V8_ISOLATE_H_ +#define V8_ISOLATE_H_ + +#include "../include/v8-debug.h" +#include "allocation.h" +#include "apiutils.h" +#include "atomicops.h" +#include "builtins.h" +#include "contexts.h" +#include "execution.h" +#include "frames.h" +#include "global-handles.h" +#include "handles.h" +#include "heap.h" +#include "regexp-stack.h" +#include "runtime-profiler.h" +#include "runtime.h" +#include "zone.h" + +namespace v8 { +namespace internal { + +class AstSentinels; +class Bootstrapper; +class CodeGenerator; +class CodeRange; +class CompilationCache; +class ContextSlotCache; +class ContextSwitcher; +class Counters; +class CpuFeatures; +class CpuProfiler; +class DeoptimizerData; +class Deserializer; +class EmptyStatement; +class ExternalReferenceTable; +class Factory; +class FunctionInfoListener; +class HandleScopeImplementer; +class HeapProfiler; +class InlineRuntimeFunctionsTable; +class NoAllocationStringAllocator; +class PcToCodeCache; +class PreallocatedMemoryThread; +class ProducerHeapProfile; +class RegExpStack; +class SaveContext; +class ScannerConstants; +class StringInputBuffer; +class StringTracker; +class StubCache; +class ThreadManager; +class ThreadState; +class ThreadVisitor; // Defined in v8threads.h +class VMState; + +// 'void function pointer', used to roundtrip the +// ExternalReference::ExternalReferenceRedirector since we can not include +// assembler.h, where it is defined, here. +typedef void* ExternalReferenceRedirectorPointer(); + + +#ifdef ENABLE_DEBUGGER_SUPPORT +class Debug; +class Debugger; +class DebuggerAgent; +#endif + +#if !defined(__arm__) && defined(V8_TARGET_ARCH_ARM) || \ + !defined(__mips__) && defined(V8_TARGET_ARCH_MIPS) +class Redirection; +class Simulator; +#endif + + +// Static indirection table for handles to constants. If a frame +// element represents a constant, the data contains an index into +// this table of handles to the actual constants. +// Static indirection table for handles to constants. If a Result +// represents a constant, the data contains an index into this table +// of handles to the actual constants. +typedef ZoneList<Handle<Object> > ZoneObjectList; + +#define RETURN_IF_SCHEDULED_EXCEPTION(isolate) \ + if (isolate->has_scheduled_exception()) \ + return isolate->PromoteScheduledException() + +#define RETURN_IF_EMPTY_HANDLE_VALUE(isolate, call, value) \ + if (call.is_null()) { \ + ASSERT(isolate->has_pending_exception()); \ + return value; \ + } + +#define RETURN_IF_EMPTY_HANDLE(isolate, call) \ + RETURN_IF_EMPTY_HANDLE_VALUE(isolate, call, Failure::Exception()) + +#define ISOLATE_ADDRESS_LIST(C) \ + C(handler_address) \ + C(c_entry_fp_address) \ + C(context_address) \ + C(pending_exception_address) \ + C(external_caught_exception_address) + +#ifdef ENABLE_LOGGING_AND_PROFILING +#define ISOLATE_ADDRESS_LIST_PROF(C) \ + C(js_entry_sp_address) +#else +#define ISOLATE_ADDRESS_LIST_PROF(C) +#endif + + +class ThreadLocalTop BASE_EMBEDDED { + public: + // Initialize the thread data. + void Initialize(); + + // Get the top C++ try catch handler or NULL if none are registered. + // + // This method is not guarenteed to return an address that can be + // used for comparison with addresses into the JS stack. If such an + // address is needed, use try_catch_handler_address. + v8::TryCatch* TryCatchHandler(); + + // Get the address of the top C++ try catch handler or NULL if + // none are registered. + // + // This method always returns an address that can be compared to + // pointers into the JavaScript stack. When running on actual + // hardware, try_catch_handler_address and TryCatchHandler return + // the same pointer. When running on a simulator with a separate JS + // stack, try_catch_handler_address returns a JS stack address that + // corresponds to the place on the JS stack where the C++ handler + // would have been if the stack were not separate. + inline Address try_catch_handler_address() { + return try_catch_handler_address_; + } + + // Set the address of the top C++ try catch handler. + inline void set_try_catch_handler_address(Address address) { + try_catch_handler_address_ = address; + } + + void Free() { + ASSERT(!has_pending_message_); + ASSERT(!external_caught_exception_); + ASSERT(try_catch_handler_address_ == NULL); + } + + // The context where the current execution method is created and for variable + // lookups. + Context* context_; + int thread_id_; + MaybeObject* pending_exception_; + bool has_pending_message_; + const char* pending_message_; + Object* pending_message_obj_; + Script* pending_message_script_; + int pending_message_start_pos_; + int pending_message_end_pos_; + // Use a separate value for scheduled exceptions to preserve the + // invariants that hold about pending_exception. We may want to + // unify them later. + MaybeObject* scheduled_exception_; + bool external_caught_exception_; + SaveContext* save_context_; + v8::TryCatch* catcher_; + + // Stack. + Address c_entry_fp_; // the frame pointer of the top c entry frame + Address handler_; // try-blocks are chained through the stack + +#ifdef USE_SIMULATOR +#if defined(V8_TARGET_ARCH_ARM) || defined(V8_TARGET_ARCH_MIPS) + Simulator* simulator_; +#endif +#endif // USE_SIMULATOR + +#ifdef ENABLE_LOGGING_AND_PROFILING + Address js_entry_sp_; // the stack pointer of the bottom js entry frame + Address external_callback_; // the external callback we're currently in +#endif + +#ifdef ENABLE_VMSTATE_TRACKING + StateTag current_vm_state_; +#endif + + // Generated code scratch locations. + int32_t formal_count_; + + // Call back function to report unsafe JS accesses. + v8::FailedAccessCheckCallback failed_access_check_callback_; + + private: + Address try_catch_handler_address_; +}; + +#if defined(V8_TARGET_ARCH_ARM) || defined(V8_TARGET_ARCH_MIPS) + +#define ISOLATE_PLATFORM_INIT_LIST(V) \ + /* VirtualFrame::SpilledScope state */ \ + V(bool, is_virtual_frame_in_spilled_scope, false) \ + /* CodeGenerator::EmitNamedStore state */ \ + V(int, inlined_write_barrier_size, -1) + +#if !defined(__arm__) && !defined(__mips__) +class HashMap; +#endif + +#else + +#define ISOLATE_PLATFORM_INIT_LIST(V) + +#endif + +#ifdef ENABLE_DEBUGGER_SUPPORT + +#define ISOLATE_DEBUGGER_INIT_LIST(V) \ + V(uint64_t, enabled_cpu_features, 0) \ + V(v8::Debug::EventCallback, debug_event_callback, NULL) \ + V(DebuggerAgent*, debugger_agent_instance, NULL) +#else + +#define ISOLATE_DEBUGGER_INIT_LIST(V) + +#endif + +#ifdef DEBUG + +#define ISOLATE_INIT_DEBUG_ARRAY_LIST(V) \ + V(CommentStatistic, paged_space_comments_statistics, \ + CommentStatistic::kMaxComments + 1) +#else + +#define ISOLATE_INIT_DEBUG_ARRAY_LIST(V) + +#endif + +#ifdef ENABLE_LOGGING_AND_PROFILING + +#define ISOLATE_LOGGING_INIT_LIST(V) \ + V(CpuProfiler*, cpu_profiler, NULL) \ + V(HeapProfiler*, heap_profiler, NULL) + +#else + +#define ISOLATE_LOGGING_INIT_LIST(V) + +#endif + +#define ISOLATE_INIT_ARRAY_LIST(V) \ + /* SerializerDeserializer state. */ \ + V(Object*, serialize_partial_snapshot_cache, kPartialSnapshotCacheCapacity) \ + V(int, jsregexp_static_offsets_vector, kJSRegexpStaticOffsetsVectorSize) \ + V(int, bad_char_shift_table, kUC16AlphabetSize) \ + V(int, good_suffix_shift_table, (kBMMaxShift + 1)) \ + V(int, suffix_table, (kBMMaxShift + 1)) \ + ISOLATE_INIT_DEBUG_ARRAY_LIST(V) + +typedef List<HeapObject*, PreallocatedStorage> DebugObjectCache; + +#define ISOLATE_INIT_LIST(V) \ + /* AssertNoZoneAllocation state. */ \ + V(bool, zone_allow_allocation, true) \ + /* SerializerDeserializer state. */ \ + V(int, serialize_partial_snapshot_cache_length, 0) \ + /* Assembler state. */ \ + /* A previously allocated buffer of kMinimalBufferSize bytes, or NULL. */ \ + V(byte*, assembler_spare_buffer, NULL) \ + V(FatalErrorCallback, exception_behavior, NULL) \ + V(v8::Debug::MessageHandler, message_handler, NULL) \ + /* To distinguish the function templates, so that we can find them in the */ \ + /* function cache of the global context. */ \ + V(int, next_serial_number, 0) \ + V(ExternalReferenceRedirectorPointer*, external_reference_redirector, NULL) \ + V(bool, always_allow_natives_syntax, false) \ + /* Part of the state of liveedit. */ \ + V(FunctionInfoListener*, active_function_info_listener, NULL) \ + /* State for Relocatable. */ \ + V(Relocatable*, relocatable_top, NULL) \ + /* State for CodeEntry in profile-generator. */ \ + V(CodeGenerator*, current_code_generator, NULL) \ + V(bool, jump_target_compiling_deferred_code, false) \ + V(DebugObjectCache*, string_stream_debug_object_cache, NULL) \ + V(Object*, string_stream_current_security_token, NULL) \ + /* TODO(isolates): Release this on destruction? */ \ + V(int*, irregexp_interpreter_backtrack_stack_cache, NULL) \ + /* Serializer state. */ \ + V(ExternalReferenceTable*, external_reference_table, NULL) \ + /* AstNode state. */ \ + V(unsigned, ast_node_id, 0) \ + V(unsigned, ast_node_count, 0) \ + /* SafeStackFrameIterator activations count. */ \ + V(int, safe_stack_iterator_counter, 0) \ + ISOLATE_PLATFORM_INIT_LIST(V) \ + ISOLATE_LOGGING_INIT_LIST(V) \ + ISOLATE_DEBUGGER_INIT_LIST(V) + +class Isolate { + // These forward declarations are required to make the friend declarations in + // PerIsolateThreadData work on some older versions of gcc. + class ThreadDataTable; + class EntryStackItem; + public: + ~Isolate(); + + typedef int ThreadId; + + // A thread has a PerIsolateThreadData instance for each isolate that it has + // entered. That instance is allocated when the isolate is initially entered + // and reused on subsequent entries. + class PerIsolateThreadData { + public: + PerIsolateThreadData(Isolate* isolate, ThreadId thread_id) + : isolate_(isolate), + thread_id_(thread_id), + stack_limit_(0), + thread_state_(NULL), +#if !defined(__arm__) && defined(V8_TARGET_ARCH_ARM) || \ + !defined(__mips__) && defined(V8_TARGET_ARCH_MIPS) + simulator_(NULL), +#endif + next_(NULL), + prev_(NULL) { } + Isolate* isolate() const { return isolate_; } + ThreadId thread_id() const { return thread_id_; } + void set_stack_limit(uintptr_t value) { stack_limit_ = value; } + uintptr_t stack_limit() const { return stack_limit_; } + ThreadState* thread_state() const { return thread_state_; } + void set_thread_state(ThreadState* value) { thread_state_ = value; } + +#if !defined(__arm__) && defined(V8_TARGET_ARCH_ARM) || \ + !defined(__mips__) && defined(V8_TARGET_ARCH_MIPS) + Simulator* simulator() const { return simulator_; } + void set_simulator(Simulator* simulator) { + simulator_ = simulator; + } +#endif + + bool Matches(Isolate* isolate, ThreadId thread_id) const { + return isolate_ == isolate && thread_id_ == thread_id; + } + + private: + Isolate* isolate_; + ThreadId thread_id_; + uintptr_t stack_limit_; + ThreadState* thread_state_; + +#if !defined(__arm__) && defined(V8_TARGET_ARCH_ARM) || \ + !defined(__mips__) && defined(V8_TARGET_ARCH_MIPS) + Simulator* simulator_; +#endif + + PerIsolateThreadData* next_; + PerIsolateThreadData* prev_; + + friend class Isolate; + friend class ThreadDataTable; + friend class EntryStackItem; + + DISALLOW_COPY_AND_ASSIGN(PerIsolateThreadData); + }; + + + enum AddressId { +#define C(name) k_##name, + ISOLATE_ADDRESS_LIST(C) + ISOLATE_ADDRESS_LIST_PROF(C) +#undef C + k_isolate_address_count + }; + + // Returns the PerIsolateThreadData for the current thread (or NULL if one is + // not currently set). + static PerIsolateThreadData* CurrentPerIsolateThreadData() { + return reinterpret_cast<PerIsolateThreadData*>( + Thread::GetThreadLocal(per_isolate_thread_data_key_)); + } + + // Returns the isolate inside which the current thread is running. + INLINE(static Isolate* Current()) { + Isolate* isolate = reinterpret_cast<Isolate*>( + Thread::GetExistingThreadLocal(isolate_key_)); + ASSERT(isolate != NULL); + return isolate; + } + + INLINE(static Isolate* UncheckedCurrent()) { + return reinterpret_cast<Isolate*>(Thread::GetThreadLocal(isolate_key_)); + } + + bool Init(Deserializer* des); + + bool IsInitialized() { return state_ == INITIALIZED; } + + // True if at least one thread Enter'ed this isolate. + bool IsInUse() { return entry_stack_ != NULL; } + + // Destroys the non-default isolates. + // Sets default isolate into "has_been_disposed" state rather then destroying, + // for legacy API reasons. + void TearDown(); + + bool IsDefaultIsolate() const { return this == default_isolate_; } + + // Ensures that process-wide resources and the default isolate have been + // allocated. It is only necessary to call this method in rare casses, for + // example if you are using V8 from within the body of a static initializer. + // Safe to call multiple times. + static void EnsureDefaultIsolate(); + + // Get the debugger from the default isolate. Preinitializes the + // default isolate if needed. + static Debugger* GetDefaultIsolateDebugger(); + + // Get the stack guard from the default isolate. Preinitializes the + // default isolate if needed. + static StackGuard* GetDefaultIsolateStackGuard(); + + // Returns the key used to store the pointer to the current isolate. + // Used internally for V8 threads that do not execute JavaScript but still + // are part of the domain of an isolate (like the context switcher). + static Thread::LocalStorageKey isolate_key() { + return isolate_key_; + } + + // Returns the key used to store process-wide thread IDs. + static Thread::LocalStorageKey thread_id_key() { + return thread_id_key_; + } + + // Atomically allocates a new thread ID. + static ThreadId AllocateThreadId(); + + // If a client attempts to create a Locker without specifying an isolate, + // we assume that the client is using legacy behavior. Set up the current + // thread to be inside the implicit isolate (or fail a check if we have + // switched to non-legacy behavior). + static void EnterDefaultIsolate(); + + // Debug. + // Mutex for serializing access to break control structures. + Mutex* break_access() { return break_access_; } + + Address get_address_from_id(AddressId id); + + // Access to top context (where the current function object was created). + Context* context() { return thread_local_top_.context_; } + void set_context(Context* context) { + thread_local_top_.context_ = context; + } + Context** context_address() { return &thread_local_top_.context_; } + + SaveContext* save_context() {return thread_local_top_.save_context_; } + void set_save_context(SaveContext* save) { + thread_local_top_.save_context_ = save; + } + + // Access to current thread id. + int thread_id() { return thread_local_top_.thread_id_; } + void set_thread_id(int id) { thread_local_top_.thread_id_ = id; } + + // Interface to pending exception. + MaybeObject* pending_exception() { + ASSERT(has_pending_exception()); + return thread_local_top_.pending_exception_; + } + bool external_caught_exception() { + return thread_local_top_.external_caught_exception_; + } + void set_pending_exception(MaybeObject* exception) { + thread_local_top_.pending_exception_ = exception; + } + void clear_pending_exception() { + thread_local_top_.pending_exception_ = heap_.the_hole_value(); + } + MaybeObject** pending_exception_address() { + return &thread_local_top_.pending_exception_; + } + bool has_pending_exception() { + return !thread_local_top_.pending_exception_->IsTheHole(); + } + void clear_pending_message() { + thread_local_top_.has_pending_message_ = false; + thread_local_top_.pending_message_ = NULL; + thread_local_top_.pending_message_obj_ = heap_.the_hole_value(); + thread_local_top_.pending_message_script_ = NULL; + } + v8::TryCatch* try_catch_handler() { + return thread_local_top_.TryCatchHandler(); + } + Address try_catch_handler_address() { + return thread_local_top_.try_catch_handler_address(); + } + bool* external_caught_exception_address() { + return &thread_local_top_.external_caught_exception_; + } + + MaybeObject** scheduled_exception_address() { + return &thread_local_top_.scheduled_exception_; + } + MaybeObject* scheduled_exception() { + ASSERT(has_scheduled_exception()); + return thread_local_top_.scheduled_exception_; + } + bool has_scheduled_exception() { + return !thread_local_top_.scheduled_exception_->IsTheHole(); + } + void clear_scheduled_exception() { + thread_local_top_.scheduled_exception_ = heap_.the_hole_value(); + } + + bool IsExternallyCaught(); + + bool is_catchable_by_javascript(MaybeObject* exception) { + return (exception != Failure::OutOfMemoryException()) && + (exception != heap()->termination_exception()); + } + + // JS execution stack (see frames.h). + static Address c_entry_fp(ThreadLocalTop* thread) { + return thread->c_entry_fp_; + } + static Address handler(ThreadLocalTop* thread) { return thread->handler_; } + + inline Address* c_entry_fp_address() { + return &thread_local_top_.c_entry_fp_; + } + inline Address* handler_address() { return &thread_local_top_.handler_; } + +#ifdef ENABLE_LOGGING_AND_PROFILING + // Bottom JS entry (see StackTracer::Trace in log.cc). + static Address js_entry_sp(ThreadLocalTop* thread) { + return thread->js_entry_sp_; + } + inline Address* js_entry_sp_address() { + return &thread_local_top_.js_entry_sp_; + } +#endif + + // Generated code scratch locations. + void* formal_count_address() { return &thread_local_top_.formal_count_; } + + // Returns the global object of the current context. It could be + // a builtin object, or a js global object. + Handle<GlobalObject> global() { + return Handle<GlobalObject>(context()->global()); + } + + // Returns the global proxy object of the current context. + Object* global_proxy() { + return context()->global_proxy(); + } + + Handle<JSBuiltinsObject> js_builtins_object() { + return Handle<JSBuiltinsObject>(thread_local_top_.context_->builtins()); + } + + static int ArchiveSpacePerThread() { return sizeof(ThreadLocalTop); } + void FreeThreadResources() { thread_local_top_.Free(); } + + // This method is called by the api after operations that may throw + // exceptions. If an exception was thrown and not handled by an external + // handler the exception is scheduled to be rethrown when we return to running + // JavaScript code. If an exception is scheduled true is returned. + bool OptionalRescheduleException(bool is_bottom_call); + + void SetCaptureStackTraceForUncaughtExceptions( + bool capture, + int frame_limit, + StackTrace::StackTraceOptions options); + + // Tells whether the current context has experienced an out of memory + // exception. + bool is_out_of_memory(); + + void PrintCurrentStackTrace(FILE* out); + void PrintStackTrace(FILE* out, char* thread_data); + void PrintStack(StringStream* accumulator); + void PrintStack(); + Handle<String> StackTraceString(); + Handle<JSArray> CaptureCurrentStackTrace( + int frame_limit, + StackTrace::StackTraceOptions options); + + // Returns if the top context may access the given global object. If + // the result is false, the pending exception is guaranteed to be + // set. + bool MayNamedAccess(JSObject* receiver, + Object* key, + v8::AccessType type); + bool MayIndexedAccess(JSObject* receiver, + uint32_t index, + v8::AccessType type); + + void SetFailedAccessCheckCallback(v8::FailedAccessCheckCallback callback); + void ReportFailedAccessCheck(JSObject* receiver, v8::AccessType type); + + // Exception throwing support. The caller should use the result + // of Throw() as its return value. + Failure* Throw(Object* exception, MessageLocation* location = NULL); + // Re-throw an exception. This involves no error reporting since + // error reporting was handled when the exception was thrown + // originally. + Failure* ReThrow(MaybeObject* exception, MessageLocation* location = NULL); + void ScheduleThrow(Object* exception); + void ReportPendingMessages(); + Failure* ThrowIllegalOperation(); + + // Promote a scheduled exception to pending. Asserts has_scheduled_exception. + Failure* PromoteScheduledException(); + void DoThrow(MaybeObject* exception, + MessageLocation* location, + const char* message); + // Checks if exception should be reported and finds out if it's + // caught externally. + bool ShouldReportException(bool* can_be_caught_externally, + bool catchable_by_javascript); + + // Attempts to compute the current source location, storing the + // result in the target out parameter. + void ComputeLocation(MessageLocation* target); + + // Override command line flag. + void TraceException(bool flag); + + // Out of resource exception helpers. + Failure* StackOverflow(); + Failure* TerminateExecution(); + + // Administration + void Iterate(ObjectVisitor* v); + void Iterate(ObjectVisitor* v, ThreadLocalTop* t); + char* Iterate(ObjectVisitor* v, char* t); + void IterateThread(ThreadVisitor* v); + void IterateThread(ThreadVisitor* v, char* t); + + + // Returns the current global context. + Handle<Context> global_context(); + + // Returns the global context of the calling JavaScript code. That + // is, the global context of the top-most JavaScript frame. + Handle<Context> GetCallingGlobalContext(); + + void RegisterTryCatchHandler(v8::TryCatch* that); + void UnregisterTryCatchHandler(v8::TryCatch* that); + + char* ArchiveThread(char* to); + char* RestoreThread(char* from); + + static const char* const kStackOverflowMessage; + + static const int kUC16AlphabetSize = 256; // See StringSearchBase. + static const int kBMMaxShift = 250; // See StringSearchBase. + + // Accessors. +#define GLOBAL_ACCESSOR(type, name, initialvalue) \ + inline type name() const { \ + ASSERT(OFFSET_OF(Isolate, name##_) == name##_debug_offset_); \ + return name##_; \ + } \ + inline void set_##name(type value) { \ + ASSERT(OFFSET_OF(Isolate, name##_) == name##_debug_offset_); \ + name##_ = value; \ + } + ISOLATE_INIT_LIST(GLOBAL_ACCESSOR) +#undef GLOBAL_ACCESSOR + +#define GLOBAL_ARRAY_ACCESSOR(type, name, length) \ + inline type* name() { \ + ASSERT(OFFSET_OF(Isolate, name##_) == name##_debug_offset_); \ + return &(name##_)[0]; \ + } + ISOLATE_INIT_ARRAY_LIST(GLOBAL_ARRAY_ACCESSOR) +#undef GLOBAL_ARRAY_ACCESSOR + +#define GLOBAL_CONTEXT_FIELD_ACCESSOR(index, type, name) \ + Handle<type> name() { \ + return Handle<type>(context()->global_context()->name()); \ + } + GLOBAL_CONTEXT_FIELDS(GLOBAL_CONTEXT_FIELD_ACCESSOR) +#undef GLOBAL_CONTEXT_FIELD_ACCESSOR + + Bootstrapper* bootstrapper() { return bootstrapper_; } + Counters* counters() { return counters_; } + CodeRange* code_range() { return code_range_; } + RuntimeProfiler* runtime_profiler() { return runtime_profiler_; } + CompilationCache* compilation_cache() { return compilation_cache_; } + Logger* logger() { return logger_; } + StackGuard* stack_guard() { return &stack_guard_; } + Heap* heap() { return &heap_; } + StatsTable* stats_table() { return stats_table_; } + StubCache* stub_cache() { return stub_cache_; } + DeoptimizerData* deoptimizer_data() { return deoptimizer_data_; } + ThreadLocalTop* thread_local_top() { return &thread_local_top_; } + + TranscendentalCache* transcendental_cache() const { + return transcendental_cache_; + } + + MemoryAllocator* memory_allocator() { + return memory_allocator_; + } + + KeyedLookupCache* keyed_lookup_cache() { + return keyed_lookup_cache_; + } + + ContextSlotCache* context_slot_cache() { + return context_slot_cache_; + } + + DescriptorLookupCache* descriptor_lookup_cache() { + return descriptor_lookup_cache_; + } + + v8::ImplementationUtilities::HandleScopeData* handle_scope_data() { + return &handle_scope_data_; + } + HandleScopeImplementer* handle_scope_implementer() { + ASSERT(handle_scope_implementer_); + return handle_scope_implementer_; + } + Zone* zone() { return &zone_; } + + ScannerConstants* scanner_constants() { + return scanner_constants_; + } + + PcToCodeCache* pc_to_code_cache() { return pc_to_code_cache_; } + + StringInputBuffer* write_input_buffer() { return write_input_buffer_; } + + GlobalHandles* global_handles() { return global_handles_; } + + ThreadManager* thread_manager() { return thread_manager_; } + + ContextSwitcher* context_switcher() { return context_switcher_; } + + void set_context_switcher(ContextSwitcher* switcher) { + context_switcher_ = switcher; + } + + StringTracker* string_tracker() { return string_tracker_; } + + unibrow::Mapping<unibrow::Ecma262UnCanonicalize>* jsregexp_uncanonicalize() { + return &jsregexp_uncanonicalize_; + } + + unibrow::Mapping<unibrow::CanonicalizationRange>* jsregexp_canonrange() { + return &jsregexp_canonrange_; + } + + StringInputBuffer* objects_string_compare_buffer_a() { + return &objects_string_compare_buffer_a_; + } + + StringInputBuffer* objects_string_compare_buffer_b() { + return &objects_string_compare_buffer_b_; + } + + StaticResource<StringInputBuffer>* objects_string_input_buffer() { + return &objects_string_input_buffer_; + } + + AstSentinels* ast_sentinels() { return ast_sentinels_; } + + RuntimeState* runtime_state() { return &runtime_state_; } + + StringInputBuffer* liveedit_compare_substrings_buf1() { + return &liveedit_compare_substrings_buf1_; + } + + StringInputBuffer* liveedit_compare_substrings_buf2() { + return &liveedit_compare_substrings_buf2_; + } + + StaticResource<SafeStringInputBuffer>* compiler_safe_string_input_buffer() { + return &compiler_safe_string_input_buffer_; + } + + Builtins* builtins() { return &builtins_; } + + unibrow::Mapping<unibrow::Ecma262Canonicalize>* + regexp_macro_assembler_canonicalize() { + return ®exp_macro_assembler_canonicalize_; + } + + RegExpStack* regexp_stack() { return regexp_stack_; } + + unibrow::Mapping<unibrow::Ecma262Canonicalize>* + interp_canonicalize_mapping() { + return &interp_canonicalize_mapping_; + } + + ZoneObjectList* frame_element_constant_list() { + return &frame_element_constant_list_; + } + + ZoneObjectList* result_constant_list() { + return &result_constant_list_; + } + + void* PreallocatedStorageNew(size_t size); + void PreallocatedStorageDelete(void* p); + void PreallocatedStorageInit(size_t size); + +#ifdef ENABLE_DEBUGGER_SUPPORT + Debugger* debugger() { return debugger_; } + Debug* debug() { return debug_; } +#endif + +#ifdef ENABLE_LOGGING_AND_PROFILING + ProducerHeapProfile* producer_heap_profile() { + return producer_heap_profile_; + } +#endif + +#ifdef DEBUG + HistogramInfo* heap_histograms() { return heap_histograms_; } + + JSObject::SpillInformation* js_spill_information() { + return &js_spill_information_; + } + + int* code_kind_statistics() { return code_kind_statistics_; } +#endif + +#if defined(V8_TARGET_ARCH_ARM) && !defined(__arm__) || \ + defined(V8_TARGET_ARCH_MIPS) && !defined(__mips__) + bool simulator_initialized() { return simulator_initialized_; } + void set_simulator_initialized(bool initialized) { + simulator_initialized_ = initialized; + } + + HashMap* simulator_i_cache() { return simulator_i_cache_; } + void set_simulator_i_cache(HashMap* hash_map) { + simulator_i_cache_ = hash_map; + } + + Redirection* simulator_redirection() { + return simulator_redirection_; + } + void set_simulator_redirection(Redirection* redirection) { + simulator_redirection_ = redirection; + } +#endif + + Factory* factory() { return reinterpret_cast<Factory*>(this); } + + // SerializerDeserializer state. + static const int kPartialSnapshotCacheCapacity = 1400; + + static const int kJSRegexpStaticOffsetsVectorSize = 50; + +#ifdef ENABLE_LOGGING_AND_PROFILING + Address external_callback() { + return thread_local_top_.external_callback_; + } + void set_external_callback(Address callback) { + thread_local_top_.external_callback_ = callback; + } +#endif + +#ifdef ENABLE_VMSTATE_TRACKING + StateTag current_vm_state() { + return thread_local_top_.current_vm_state_; + } + + void SetCurrentVMState(StateTag state) { + if (RuntimeProfiler::IsEnabled()) { + if (state == JS) { + // JS or non-JS -> JS transition. + RuntimeProfiler::IsolateEnteredJS(this); + } else if (thread_local_top_.current_vm_state_ == JS) { + // JS -> non-JS transition. + ASSERT(RuntimeProfiler::IsSomeIsolateInJS()); + RuntimeProfiler::IsolateExitedJS(this); + } + } + thread_local_top_.current_vm_state_ = state; + } +#endif + + void ResetEagerOptimizingData(); + + private: + Isolate(); + + // The per-process lock should be acquired before the ThreadDataTable is + // modified. + class ThreadDataTable { + public: + ThreadDataTable(); + ~ThreadDataTable(); + + PerIsolateThreadData* Lookup(Isolate* isolate, ThreadId thread_id); + void Insert(PerIsolateThreadData* data); + void Remove(Isolate* isolate, ThreadId thread_id); + void Remove(PerIsolateThreadData* data); + + private: + PerIsolateThreadData* list_; + }; + + // These items form a stack synchronously with threads Enter'ing and Exit'ing + // the Isolate. The top of the stack points to a thread which is currently + // running the Isolate. When the stack is empty, the Isolate is considered + // not entered by any thread and can be Disposed. + // If the same thread enters the Isolate more then once, the entry_count_ + // is incremented rather then a new item pushed to the stack. + class EntryStackItem { + public: + EntryStackItem(PerIsolateThreadData* previous_thread_data, + Isolate* previous_isolate, + EntryStackItem* previous_item) + : entry_count(1), + previous_thread_data(previous_thread_data), + previous_isolate(previous_isolate), + previous_item(previous_item) { } + + int entry_count; + PerIsolateThreadData* previous_thread_data; + Isolate* previous_isolate; + EntryStackItem* previous_item; + + DISALLOW_COPY_AND_ASSIGN(EntryStackItem); + }; + + // This mutex protects highest_thread_id_, thread_data_table_ and + // default_isolate_. + static Mutex* process_wide_mutex_; + + static Thread::LocalStorageKey per_isolate_thread_data_key_; + static Thread::LocalStorageKey isolate_key_; + static Thread::LocalStorageKey thread_id_key_; + static Isolate* default_isolate_; + static ThreadDataTable* thread_data_table_; + static ThreadId highest_thread_id_; + + bool PreInit(); + + void Deinit(); + + static void SetIsolateThreadLocals(Isolate* isolate, + PerIsolateThreadData* data); + + enum State { + UNINITIALIZED, // Some components may not have been allocated. + PREINITIALIZED, // Components have been allocated but not initialized. + INITIALIZED // All components are fully initialized. + }; + + State state_; + EntryStackItem* entry_stack_; + + // Allocate and insert PerIsolateThreadData into the ThreadDataTable + // (regardless of whether such data already exists). + PerIsolateThreadData* AllocatePerIsolateThreadData(ThreadId thread_id); + + // Find the PerThread for this particular (isolate, thread) combination. + // If one does not yet exist, allocate a new one. + PerIsolateThreadData* FindOrAllocatePerThreadDataForThisThread(); + + // PreInits and returns a default isolate. Needed when a new thread tries + // to create a Locker for the first time (the lock itself is in the isolate). + static Isolate* GetDefaultIsolateForLocking(); + + // Initializes the current thread to run this Isolate. + // Not thread-safe. Multiple threads should not Enter/Exit the same isolate + // at the same time, this should be prevented using external locking. + void Enter(); + + // Exits the current thread. The previosuly entered Isolate is restored + // for the thread. + // Not thread-safe. Multiple threads should not Enter/Exit the same isolate + // at the same time, this should be prevented using external locking. + void Exit(); + + void PreallocatedMemoryThreadStart(); + void PreallocatedMemoryThreadStop(); + void InitializeThreadLocal(); + + void PrintStackTrace(FILE* out, ThreadLocalTop* thread); + void MarkCompactPrologue(bool is_compacting, + ThreadLocalTop* archived_thread_data); + void MarkCompactEpilogue(bool is_compacting, + ThreadLocalTop* archived_thread_data); + + void FillCache(); + + int stack_trace_nesting_level_; + StringStream* incomplete_message_; + // The preallocated memory thread singleton. + PreallocatedMemoryThread* preallocated_memory_thread_; + Address isolate_addresses_[k_isolate_address_count + 1]; // NOLINT + NoAllocationStringAllocator* preallocated_message_space_; + + Bootstrapper* bootstrapper_; + RuntimeProfiler* runtime_profiler_; + CompilationCache* compilation_cache_; + Counters* counters_; + CodeRange* code_range_; + Mutex* break_access_; + Heap heap_; + Logger* logger_; + StackGuard stack_guard_; + StatsTable* stats_table_; + StubCache* stub_cache_; + DeoptimizerData* deoptimizer_data_; + ThreadLocalTop thread_local_top_; + bool capture_stack_trace_for_uncaught_exceptions_; + int stack_trace_for_uncaught_exceptions_frame_limit_; + StackTrace::StackTraceOptions stack_trace_for_uncaught_exceptions_options_; + TranscendentalCache* transcendental_cache_; + MemoryAllocator* memory_allocator_; + KeyedLookupCache* keyed_lookup_cache_; + ContextSlotCache* context_slot_cache_; + DescriptorLookupCache* descriptor_lookup_cache_; + v8::ImplementationUtilities::HandleScopeData handle_scope_data_; + HandleScopeImplementer* handle_scope_implementer_; + ScannerConstants* scanner_constants_; + Zone zone_; + PreallocatedStorage in_use_list_; + PreallocatedStorage free_list_; + bool preallocated_storage_preallocated_; + PcToCodeCache* pc_to_code_cache_; + StringInputBuffer* write_input_buffer_; + GlobalHandles* global_handles_; + ContextSwitcher* context_switcher_; + ThreadManager* thread_manager_; + AstSentinels* ast_sentinels_; + RuntimeState runtime_state_; + StringInputBuffer liveedit_compare_substrings_buf1_; + StringInputBuffer liveedit_compare_substrings_buf2_; + StaticResource<SafeStringInputBuffer> compiler_safe_string_input_buffer_; + Builtins builtins_; + StringTracker* string_tracker_; + unibrow::Mapping<unibrow::Ecma262UnCanonicalize> jsregexp_uncanonicalize_; + unibrow::Mapping<unibrow::CanonicalizationRange> jsregexp_canonrange_; + StringInputBuffer objects_string_compare_buffer_a_; + StringInputBuffer objects_string_compare_buffer_b_; + StaticResource<StringInputBuffer> objects_string_input_buffer_; + unibrow::Mapping<unibrow::Ecma262Canonicalize> + regexp_macro_assembler_canonicalize_; + RegExpStack* regexp_stack_; + unibrow::Mapping<unibrow::Ecma262Canonicalize> interp_canonicalize_mapping_; + ZoneObjectList frame_element_constant_list_; + ZoneObjectList result_constant_list_; + +#if defined(V8_TARGET_ARCH_ARM) && !defined(__arm__) || \ + defined(V8_TARGET_ARCH_MIPS) && !defined(__mips__) + bool simulator_initialized_; + HashMap* simulator_i_cache_; + Redirection* simulator_redirection_; +#endif + +#ifdef DEBUG + // A static array of histogram info for each type. + HistogramInfo heap_histograms_[LAST_TYPE + 1]; + JSObject::SpillInformation js_spill_information_; + int code_kind_statistics_[Code::NUMBER_OF_KINDS]; +#endif + +#ifdef ENABLE_DEBUGGER_SUPPORT + Debugger* debugger_; + Debug* debug_; +#endif + +#ifdef ENABLE_LOGGING_AND_PROFILING + ProducerHeapProfile* producer_heap_profile_; +#endif + +#define GLOBAL_BACKING_STORE(type, name, initialvalue) \ + type name##_; + ISOLATE_INIT_LIST(GLOBAL_BACKING_STORE) +#undef GLOBAL_BACKING_STORE + +#define GLOBAL_ARRAY_BACKING_STORE(type, name, length) \ + type name##_[length]; + ISOLATE_INIT_ARRAY_LIST(GLOBAL_ARRAY_BACKING_STORE) +#undef GLOBAL_ARRAY_BACKING_STORE + +#ifdef DEBUG + // This class is huge and has a number of fields controlled by + // preprocessor defines. Make sure the offsets of these fields agree + // between compilation units. +#define ISOLATE_FIELD_OFFSET(type, name, ignored) \ + static const intptr_t name##_debug_offset_; + ISOLATE_INIT_LIST(ISOLATE_FIELD_OFFSET) + ISOLATE_INIT_ARRAY_LIST(ISOLATE_FIELD_OFFSET) +#undef ISOLATE_FIELD_OFFSET +#endif + + friend class ExecutionAccess; + friend class IsolateInitializer; + friend class v8::Isolate; + friend class v8::Locker; + + DISALLOW_COPY_AND_ASSIGN(Isolate); +}; + + +// If the GCC version is 4.1.x or 4.2.x an additional field is added to the +// class as a work around for a bug in the generated code found with these +// versions of GCC. See V8 issue 122 for details. +class SaveContext BASE_EMBEDDED { + public: + explicit SaveContext(Isolate* isolate) : prev_(isolate->save_context()) { + if (isolate->context() != NULL) { + context_ = Handle<Context>(isolate->context()); +#if __GNUC_VERSION__ >= 40100 && __GNUC_VERSION__ < 40300 + dummy_ = Handle<Context>(isolate->context()); +#endif + } + isolate->set_save_context(this); + + // If there is no JS frame under the current C frame, use the value 0. + JavaScriptFrameIterator it(isolate); + js_sp_ = it.done() ? 0 : it.frame()->sp(); + } + + ~SaveContext() { + if (context_.is_null()) { + Isolate* isolate = Isolate::Current(); + isolate->set_context(NULL); + isolate->set_save_context(prev_); + } else { + Isolate* isolate = context_->GetIsolate(); + isolate->set_context(*context_); + isolate->set_save_context(prev_); + } + } + + Handle<Context> context() { return context_; } + SaveContext* prev() { return prev_; } + + // Returns true if this save context is below a given JavaScript frame. + bool below(JavaScriptFrame* frame) { + return (js_sp_ == 0) || (frame->sp() < js_sp_); + } + + private: + Handle<Context> context_; +#if __GNUC_VERSION__ >= 40100 && __GNUC_VERSION__ < 40300 + Handle<Context> dummy_; +#endif + SaveContext* prev_; + Address js_sp_; // The top JS frame's sp when saving context. +}; + + +class AssertNoContextChange BASE_EMBEDDED { +#ifdef DEBUG + public: + AssertNoContextChange() : + scope_(Isolate::Current()), + context_(Isolate::Current()->context(), Isolate::Current()) { + } + + ~AssertNoContextChange() { + ASSERT(Isolate::Current()->context() == *context_); + } + + private: + HandleScope scope_; + Handle<Context> context_; +#else + public: + AssertNoContextChange() { } +#endif +}; + + +class ExecutionAccess BASE_EMBEDDED { + public: + explicit ExecutionAccess(Isolate* isolate) : isolate_(isolate) { + Lock(isolate); + } + ~ExecutionAccess() { Unlock(isolate_); } + + static void Lock(Isolate* isolate) { isolate->break_access_->Lock(); } + static void Unlock(Isolate* isolate) { isolate->break_access_->Unlock(); } + + static bool TryLock(Isolate* isolate) { + return isolate->break_access_->TryLock(); + } + + private: + Isolate* isolate_; +}; + + +// Support for checking for stack-overflows in C++ code. +class StackLimitCheck BASE_EMBEDDED { + public: + explicit StackLimitCheck(Isolate* isolate) : isolate_(isolate) { } + + bool HasOverflowed() const { + StackGuard* stack_guard = isolate_->stack_guard(); + // Stack has overflowed in C++ code only if stack pointer exceeds the C++ + // stack guard and the limits are not set to interrupt values. + // TODO(214): Stack overflows are ignored if a interrupt is pending. This + // code should probably always use the initial C++ limit. + return (reinterpret_cast<uintptr_t>(this) < stack_guard->climit()) && + stack_guard->IsStackOverflow(); + } + private: + Isolate* isolate_; +}; + + +// Support for temporarily postponing interrupts. When the outermost +// postpone scope is left the interrupts will be re-enabled and any +// interrupts that occurred while in the scope will be taken into +// account. +class PostponeInterruptsScope BASE_EMBEDDED { + public: + explicit PostponeInterruptsScope(Isolate* isolate) + : stack_guard_(isolate->stack_guard()) { + stack_guard_->thread_local_.postpone_interrupts_nesting_++; + stack_guard_->DisableInterrupts(); + } + + ~PostponeInterruptsScope() { + if (--stack_guard_->thread_local_.postpone_interrupts_nesting_ == 0) { + stack_guard_->EnableInterrupts(); + } + } + private: + StackGuard* stack_guard_; +}; + + +// Temporary macros for accessing current isolate and its subobjects. +// They provide better readability, especially when used a lot in the code. +#define HEAP (v8::internal::Isolate::Current()->heap()) +#define FACTORY (v8::internal::Isolate::Current()->factory()) +#define ISOLATE (v8::internal::Isolate::Current()) +#define ZONE (v8::internal::Isolate::Current()->zone()) +#define LOGGER (v8::internal::Isolate::Current()->logger()) + + +// Tells whether the global context is marked with out of memory. +inline bool Context::has_out_of_memory() { + return global_context()->out_of_memory()->IsTrue(); +} + + +// Mark the global context with out of memory. +inline void Context::mark_out_of_memory() { + global_context()->set_out_of_memory(HEAP->true_value()); +} + + +// Temporary macro to be used to flag definitions that are indeed static +// and not per-isolate. (It would be great to be able to grep for [static]!) +#define RLYSTC static + + +// Temporary macro to be used to flag classes that should be static. +#define STATIC_CLASS class + + +// Temporary macro to be used to flag classes that are completely converted +// to be isolate-friendly. Their mix of static/nonstatic methods/fields is +// correct. +#define ISOLATED_CLASS class + +} } // namespace v8::internal + +// TODO(isolates): Get rid of these -inl.h includes and place them only where +// they're needed. +#include "allocation-inl.h" +#include "zone-inl.h" +#include "frames-inl.h" + +#endif // V8_ISOLATE_H_ |