| // Copyright 2006-2008 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. |
| |
| #include <stdlib.h> |
| |
| #include "v8.h" |
| |
| #include "api.h" |
| #include "bootstrapper.h" |
| #include "codegen-inl.h" |
| #include "debug.h" |
| #include "simulator.h" |
| #include "v8threads.h" |
| |
| namespace v8 { |
| namespace internal { |
| |
| |
| static Handle<Object> Invoke(bool construct, |
| Handle<JSFunction> func, |
| Handle<Object> receiver, |
| int argc, |
| Object*** args, |
| bool* has_pending_exception) { |
| // Entering JavaScript. |
| VMState state(JS); |
| |
| // Placeholder for return value. |
| MaybeObject* value = reinterpret_cast<Object*>(kZapValue); |
| |
| typedef Object* (*JSEntryFunction)( |
| byte* entry, |
| Object* function, |
| Object* receiver, |
| int argc, |
| Object*** args); |
| |
| Handle<Code> code; |
| if (construct) { |
| JSConstructEntryStub stub; |
| code = stub.GetCode(); |
| } else { |
| JSEntryStub stub; |
| code = stub.GetCode(); |
| } |
| |
| // Convert calls on global objects to be calls on the global |
| // receiver instead to avoid having a 'this' pointer which refers |
| // directly to a global object. |
| if (receiver->IsGlobalObject()) { |
| Handle<GlobalObject> global = Handle<GlobalObject>::cast(receiver); |
| receiver = Handle<JSObject>(global->global_receiver()); |
| } |
| |
| // Make sure that the global object of the context we're about to |
| // make the current one is indeed a global object. |
| ASSERT(func->context()->global()->IsGlobalObject()); |
| |
| { |
| // Save and restore context around invocation and block the |
| // allocation of handles without explicit handle scopes. |
| SaveContext save; |
| NoHandleAllocation na; |
| JSEntryFunction entry = FUNCTION_CAST<JSEntryFunction>(code->entry()); |
| |
| // Call the function through the right JS entry stub. |
| byte* entry_address = func->code()->entry(); |
| JSFunction* function = *func; |
| Object* receiver_pointer = *receiver; |
| value = CALL_GENERATED_CODE(entry, entry_address, function, |
| receiver_pointer, argc, args); |
| } |
| |
| #ifdef DEBUG |
| value->Verify(); |
| #endif |
| |
| // Update the pending exception flag and return the value. |
| *has_pending_exception = value->IsException(); |
| ASSERT(*has_pending_exception == Top::has_pending_exception()); |
| if (*has_pending_exception) { |
| Top::ReportPendingMessages(); |
| return Handle<Object>(); |
| } else { |
| Top::clear_pending_message(); |
| } |
| |
| return Handle<Object>(value->ToObjectUnchecked()); |
| } |
| |
| |
| Handle<Object> Execution::Call(Handle<JSFunction> func, |
| Handle<Object> receiver, |
| int argc, |
| Object*** args, |
| bool* pending_exception) { |
| return Invoke(false, func, receiver, argc, args, pending_exception); |
| } |
| |
| |
| Handle<Object> Execution::New(Handle<JSFunction> func, int argc, |
| Object*** args, bool* pending_exception) { |
| return Invoke(true, func, Top::global(), argc, args, pending_exception); |
| } |
| |
| |
| Handle<Object> Execution::TryCall(Handle<JSFunction> func, |
| Handle<Object> receiver, |
| int argc, |
| Object*** args, |
| bool* caught_exception) { |
| // Enter a try-block while executing the JavaScript code. To avoid |
| // duplicate error printing it must be non-verbose. Also, to avoid |
| // creating message objects during stack overflow we shouldn't |
| // capture messages. |
| v8::TryCatch catcher; |
| catcher.SetVerbose(false); |
| catcher.SetCaptureMessage(false); |
| |
| Handle<Object> result = Invoke(false, func, receiver, argc, args, |
| caught_exception); |
| |
| if (*caught_exception) { |
| ASSERT(catcher.HasCaught()); |
| ASSERT(Top::has_pending_exception()); |
| ASSERT(Top::external_caught_exception()); |
| if (Top::pending_exception() == Heap::termination_exception()) { |
| result = Factory::termination_exception(); |
| } else { |
| result = v8::Utils::OpenHandle(*catcher.Exception()); |
| } |
| Top::OptionalRescheduleException(true); |
| } |
| |
| ASSERT(!Top::has_pending_exception()); |
| ASSERT(!Top::external_caught_exception()); |
| return result; |
| } |
| |
| |
| Handle<Object> Execution::GetFunctionDelegate(Handle<Object> object) { |
| ASSERT(!object->IsJSFunction()); |
| |
| // If you return a function from here, it will be called when an |
| // attempt is made to call the given object as a function. |
| |
| // Regular expressions can be called as functions in both Firefox |
| // and Safari so we allow it too. |
| if (object->IsJSRegExp()) { |
| Handle<String> exec = Factory::exec_symbol(); |
| // TODO(lrn): Bug 617. We should use the default function here, not the |
| // one on the RegExp object. |
| Object* exec_function; |
| { MaybeObject* maybe_exec_function = object->GetProperty(*exec); |
| // This can lose an exception, but the alternative is to put a failure |
| // object in a handle, which is not GC safe. |
| if (!maybe_exec_function->ToObject(&exec_function)) { |
| return Factory::undefined_value(); |
| } |
| } |
| return Handle<Object>(exec_function); |
| } |
| |
| // Objects created through the API can have an instance-call handler |
| // that should be used when calling the object as a function. |
| if (object->IsHeapObject() && |
| HeapObject::cast(*object)->map()->has_instance_call_handler()) { |
| return Handle<JSFunction>( |
| Top::global_context()->call_as_function_delegate()); |
| } |
| |
| return Factory::undefined_value(); |
| } |
| |
| |
| Handle<Object> Execution::GetConstructorDelegate(Handle<Object> object) { |
| ASSERT(!object->IsJSFunction()); |
| |
| // If you return a function from here, it will be called when an |
| // attempt is made to call the given object as a constructor. |
| |
| // Objects created through the API can have an instance-call handler |
| // that should be used when calling the object as a function. |
| if (object->IsHeapObject() && |
| HeapObject::cast(*object)->map()->has_instance_call_handler()) { |
| return Handle<JSFunction>( |
| Top::global_context()->call_as_constructor_delegate()); |
| } |
| |
| return Factory::undefined_value(); |
| } |
| |
| |
| // Static state for stack guards. |
| StackGuard::ThreadLocal StackGuard::thread_local_; |
| |
| |
| bool StackGuard::IsStackOverflow() { |
| ExecutionAccess access; |
| return (thread_local_.jslimit_ != kInterruptLimit && |
| thread_local_.climit_ != kInterruptLimit); |
| } |
| |
| |
| void StackGuard::EnableInterrupts() { |
| ExecutionAccess access; |
| if (has_pending_interrupts(access)) { |
| set_interrupt_limits(access); |
| } |
| } |
| |
| |
| void StackGuard::SetStackLimit(uintptr_t limit) { |
| ExecutionAccess access; |
| // If the current limits are special (eg due to a pending interrupt) then |
| // leave them alone. |
| uintptr_t jslimit = SimulatorStack::JsLimitFromCLimit(limit); |
| if (thread_local_.jslimit_ == thread_local_.real_jslimit_) { |
| thread_local_.jslimit_ = jslimit; |
| } |
| if (thread_local_.climit_ == thread_local_.real_climit_) { |
| thread_local_.climit_ = limit; |
| } |
| thread_local_.real_climit_ = limit; |
| thread_local_.real_jslimit_ = jslimit; |
| } |
| |
| |
| void StackGuard::DisableInterrupts() { |
| ExecutionAccess access; |
| reset_limits(access); |
| } |
| |
| |
| bool StackGuard::IsInterrupted() { |
| ExecutionAccess access; |
| return thread_local_.interrupt_flags_ & INTERRUPT; |
| } |
| |
| |
| void StackGuard::Interrupt() { |
| ExecutionAccess access; |
| thread_local_.interrupt_flags_ |= INTERRUPT; |
| set_interrupt_limits(access); |
| } |
| |
| |
| bool StackGuard::IsPreempted() { |
| ExecutionAccess access; |
| return thread_local_.interrupt_flags_ & PREEMPT; |
| } |
| |
| |
| void StackGuard::Preempt() { |
| ExecutionAccess access; |
| thread_local_.interrupt_flags_ |= PREEMPT; |
| set_interrupt_limits(access); |
| } |
| |
| |
| bool StackGuard::IsTerminateExecution() { |
| ExecutionAccess access; |
| return thread_local_.interrupt_flags_ & TERMINATE; |
| } |
| |
| |
| void StackGuard::TerminateExecution() { |
| ExecutionAccess access; |
| thread_local_.interrupt_flags_ |= TERMINATE; |
| set_interrupt_limits(access); |
| } |
| |
| |
| #ifdef ENABLE_DEBUGGER_SUPPORT |
| bool StackGuard::IsDebugBreak() { |
| ExecutionAccess access; |
| return thread_local_.interrupt_flags_ & DEBUGBREAK; |
| } |
| |
| |
| void StackGuard::DebugBreak() { |
| ExecutionAccess access; |
| thread_local_.interrupt_flags_ |= DEBUGBREAK; |
| set_interrupt_limits(access); |
| } |
| |
| |
| bool StackGuard::IsDebugCommand() { |
| ExecutionAccess access; |
| return thread_local_.interrupt_flags_ & DEBUGCOMMAND; |
| } |
| |
| |
| void StackGuard::DebugCommand() { |
| if (FLAG_debugger_auto_break) { |
| ExecutionAccess access; |
| thread_local_.interrupt_flags_ |= DEBUGCOMMAND; |
| set_interrupt_limits(access); |
| } |
| } |
| #endif |
| |
| void StackGuard::Continue(InterruptFlag after_what) { |
| ExecutionAccess access; |
| thread_local_.interrupt_flags_ &= ~static_cast<int>(after_what); |
| if (!should_postpone_interrupts(access) && !has_pending_interrupts(access)) { |
| reset_limits(access); |
| } |
| } |
| |
| |
| int StackGuard::ArchiveSpacePerThread() { |
| return sizeof(ThreadLocal); |
| } |
| |
| |
| char* StackGuard::ArchiveStackGuard(char* to) { |
| ExecutionAccess access; |
| memcpy(to, reinterpret_cast<char*>(&thread_local_), sizeof(ThreadLocal)); |
| ThreadLocal blank; |
| thread_local_ = blank; |
| return to + sizeof(ThreadLocal); |
| } |
| |
| |
| char* StackGuard::RestoreStackGuard(char* from) { |
| ExecutionAccess access; |
| memcpy(reinterpret_cast<char*>(&thread_local_), from, sizeof(ThreadLocal)); |
| Heap::SetStackLimits(); |
| return from + sizeof(ThreadLocal); |
| } |
| |
| |
| static internal::Thread::LocalStorageKey stack_limit_key = |
| internal::Thread::CreateThreadLocalKey(); |
| |
| |
| void StackGuard::FreeThreadResources() { |
| Thread::SetThreadLocal( |
| stack_limit_key, |
| reinterpret_cast<void*>(thread_local_.real_climit_)); |
| } |
| |
| |
| void StackGuard::ThreadLocal::Clear() { |
| real_jslimit_ = kIllegalLimit; |
| jslimit_ = kIllegalLimit; |
| real_climit_ = kIllegalLimit; |
| climit_ = kIllegalLimit; |
| nesting_ = 0; |
| postpone_interrupts_nesting_ = 0; |
| interrupt_flags_ = 0; |
| Heap::SetStackLimits(); |
| } |
| |
| |
| void StackGuard::ThreadLocal::Initialize() { |
| if (real_climit_ == kIllegalLimit) { |
| // Takes the address of the limit variable in order to find out where |
| // the top of stack is right now. |
| uintptr_t limit = reinterpret_cast<uintptr_t>(&limit) - kLimitSize; |
| ASSERT(reinterpret_cast<uintptr_t>(&limit) > kLimitSize); |
| real_jslimit_ = SimulatorStack::JsLimitFromCLimit(limit); |
| jslimit_ = SimulatorStack::JsLimitFromCLimit(limit); |
| real_climit_ = limit; |
| climit_ = limit; |
| Heap::SetStackLimits(); |
| } |
| nesting_ = 0; |
| postpone_interrupts_nesting_ = 0; |
| interrupt_flags_ = 0; |
| } |
| |
| |
| void StackGuard::ClearThread(const ExecutionAccess& lock) { |
| thread_local_.Clear(); |
| } |
| |
| |
| void StackGuard::InitThread(const ExecutionAccess& lock) { |
| thread_local_.Initialize(); |
| void* stored_limit = Thread::GetThreadLocal(stack_limit_key); |
| // You should hold the ExecutionAccess lock when you call this. |
| if (stored_limit != NULL) { |
| StackGuard::SetStackLimit(reinterpret_cast<intptr_t>(stored_limit)); |
| } |
| } |
| |
| |
| // --- C a l l s t o n a t i v e s --- |
| |
| #define RETURN_NATIVE_CALL(name, argc, argv, has_pending_exception) \ |
| do { \ |
| Object** args[argc] = argv; \ |
| ASSERT(has_pending_exception != NULL); \ |
| return Call(Top::name##_fun(), Top::builtins(), argc, args, \ |
| has_pending_exception); \ |
| } while (false) |
| |
| |
| Handle<Object> Execution::ToBoolean(Handle<Object> obj) { |
| // See the similar code in runtime.js:ToBoolean. |
| if (obj->IsBoolean()) return obj; |
| bool result = true; |
| if (obj->IsString()) { |
| result = Handle<String>::cast(obj)->length() != 0; |
| } else if (obj->IsNull() || obj->IsUndefined()) { |
| result = false; |
| } else if (obj->IsNumber()) { |
| double value = obj->Number(); |
| result = !((value == 0) || isnan(value)); |
| } |
| return Handle<Object>(Heap::ToBoolean(result)); |
| } |
| |
| |
| Handle<Object> Execution::ToNumber(Handle<Object> obj, bool* exc) { |
| RETURN_NATIVE_CALL(to_number, 1, { obj.location() }, exc); |
| } |
| |
| |
| Handle<Object> Execution::ToString(Handle<Object> obj, bool* exc) { |
| RETURN_NATIVE_CALL(to_string, 1, { obj.location() }, exc); |
| } |
| |
| |
| Handle<Object> Execution::ToDetailString(Handle<Object> obj, bool* exc) { |
| RETURN_NATIVE_CALL(to_detail_string, 1, { obj.location() }, exc); |
| } |
| |
| |
| Handle<Object> Execution::ToObject(Handle<Object> obj, bool* exc) { |
| if (obj->IsJSObject()) return obj; |
| RETURN_NATIVE_CALL(to_object, 1, { obj.location() }, exc); |
| } |
| |
| |
| Handle<Object> Execution::ToInteger(Handle<Object> obj, bool* exc) { |
| RETURN_NATIVE_CALL(to_integer, 1, { obj.location() }, exc); |
| } |
| |
| |
| Handle<Object> Execution::ToUint32(Handle<Object> obj, bool* exc) { |
| RETURN_NATIVE_CALL(to_uint32, 1, { obj.location() }, exc); |
| } |
| |
| |
| Handle<Object> Execution::ToInt32(Handle<Object> obj, bool* exc) { |
| RETURN_NATIVE_CALL(to_int32, 1, { obj.location() }, exc); |
| } |
| |
| |
| Handle<Object> Execution::NewDate(double time, bool* exc) { |
| Handle<Object> time_obj = Factory::NewNumber(time); |
| RETURN_NATIVE_CALL(create_date, 1, { time_obj.location() }, exc); |
| } |
| |
| |
| #undef RETURN_NATIVE_CALL |
| |
| |
| Handle<JSRegExp> Execution::NewJSRegExp(Handle<String> pattern, |
| Handle<String> flags, |
| bool* exc) { |
| Handle<Object> re_obj = RegExpImpl::CreateRegExpLiteral( |
| Handle<JSFunction>(Top::global_context()->regexp_function()), |
| pattern, |
| flags, |
| exc); |
| if (*exc) return Handle<JSRegExp>(); |
| return Handle<JSRegExp>::cast(re_obj); |
| } |
| |
| |
| Handle<Object> Execution::CharAt(Handle<String> string, uint32_t index) { |
| int int_index = static_cast<int>(index); |
| if (int_index < 0 || int_index >= string->length()) { |
| return Factory::undefined_value(); |
| } |
| |
| Handle<Object> char_at = |
| GetProperty(Top::builtins(), Factory::char_at_symbol()); |
| if (!char_at->IsJSFunction()) { |
| return Factory::undefined_value(); |
| } |
| |
| bool caught_exception; |
| Handle<Object> index_object = Factory::NewNumberFromInt(int_index); |
| Object** index_arg[] = { index_object.location() }; |
| Handle<Object> result = TryCall(Handle<JSFunction>::cast(char_at), |
| string, |
| ARRAY_SIZE(index_arg), |
| index_arg, |
| &caught_exception); |
| if (caught_exception) { |
| return Factory::undefined_value(); |
| } |
| return result; |
| } |
| |
| |
| Handle<JSFunction> Execution::InstantiateFunction( |
| Handle<FunctionTemplateInfo> data, bool* exc) { |
| // Fast case: see if the function has already been instantiated |
| int serial_number = Smi::cast(data->serial_number())->value(); |
| Object* elm = Top::global_context()->function_cache()-> |
| GetElementNoExceptionThrown(serial_number); |
| if (elm->IsJSFunction()) return Handle<JSFunction>(JSFunction::cast(elm)); |
| // The function has not yet been instantiated in this context; do it. |
| Object** args[1] = { Handle<Object>::cast(data).location() }; |
| Handle<Object> result = |
| Call(Top::instantiate_fun(), Top::builtins(), 1, args, exc); |
| if (*exc) return Handle<JSFunction>::null(); |
| return Handle<JSFunction>::cast(result); |
| } |
| |
| |
| Handle<JSObject> Execution::InstantiateObject(Handle<ObjectTemplateInfo> data, |
| bool* exc) { |
| if (data->property_list()->IsUndefined() && |
| !data->constructor()->IsUndefined()) { |
| // Initialization to make gcc happy. |
| Object* result = NULL; |
| { |
| HandleScope scope; |
| Handle<FunctionTemplateInfo> cons_template = |
| Handle<FunctionTemplateInfo>( |
| FunctionTemplateInfo::cast(data->constructor())); |
| Handle<JSFunction> cons = InstantiateFunction(cons_template, exc); |
| if (*exc) return Handle<JSObject>::null(); |
| Handle<Object> value = New(cons, 0, NULL, exc); |
| if (*exc) return Handle<JSObject>::null(); |
| result = *value; |
| } |
| ASSERT(!*exc); |
| return Handle<JSObject>(JSObject::cast(result)); |
| } else { |
| Object** args[1] = { Handle<Object>::cast(data).location() }; |
| Handle<Object> result = |
| Call(Top::instantiate_fun(), Top::builtins(), 1, args, exc); |
| if (*exc) return Handle<JSObject>::null(); |
| return Handle<JSObject>::cast(result); |
| } |
| } |
| |
| |
| void Execution::ConfigureInstance(Handle<Object> instance, |
| Handle<Object> instance_template, |
| bool* exc) { |
| Object** args[2] = { instance.location(), instance_template.location() }; |
| Execution::Call(Top::configure_instance_fun(), Top::builtins(), 2, args, exc); |
| } |
| |
| |
| Handle<String> Execution::GetStackTraceLine(Handle<Object> recv, |
| Handle<JSFunction> fun, |
| Handle<Object> pos, |
| Handle<Object> is_global) { |
| const int argc = 4; |
| Object** args[argc] = { recv.location(), |
| Handle<Object>::cast(fun).location(), |
| pos.location(), |
| is_global.location() }; |
| bool caught_exception = false; |
| Handle<Object> result = TryCall(Top::get_stack_trace_line_fun(), |
| Top::builtins(), argc, args, |
| &caught_exception); |
| if (caught_exception || !result->IsString()) return Factory::empty_symbol(); |
| return Handle<String>::cast(result); |
| } |
| |
| |
| static Object* RuntimePreempt() { |
| // Clear the preempt request flag. |
| StackGuard::Continue(PREEMPT); |
| |
| ContextSwitcher::PreemptionReceived(); |
| |
| #ifdef ENABLE_DEBUGGER_SUPPORT |
| if (Debug::InDebugger()) { |
| // If currently in the debugger don't do any actual preemption but record |
| // that preemption occoured while in the debugger. |
| Debug::PreemptionWhileInDebugger(); |
| } else { |
| // Perform preemption. |
| v8::Unlocker unlocker; |
| Thread::YieldCPU(); |
| } |
| #else |
| // Perform preemption. |
| v8::Unlocker unlocker; |
| Thread::YieldCPU(); |
| #endif |
| |
| return Heap::undefined_value(); |
| } |
| |
| |
| #ifdef ENABLE_DEBUGGER_SUPPORT |
| Object* Execution::DebugBreakHelper() { |
| // Just continue if breaks are disabled. |
| if (Debug::disable_break()) { |
| return Heap::undefined_value(); |
| } |
| |
| // Ignore debug break during bootstrapping. |
| if (Bootstrapper::IsActive()) { |
| return Heap::undefined_value(); |
| } |
| |
| { |
| JavaScriptFrameIterator it; |
| ASSERT(!it.done()); |
| Object* fun = it.frame()->function(); |
| if (fun && fun->IsJSFunction()) { |
| // Don't stop in builtin functions. |
| if (JSFunction::cast(fun)->IsBuiltin()) { |
| return Heap::undefined_value(); |
| } |
| GlobalObject* global = JSFunction::cast(fun)->context()->global(); |
| // Don't stop in debugger functions. |
| if (Debug::IsDebugGlobal(global)) { |
| return Heap::undefined_value(); |
| } |
| } |
| } |
| |
| // Collect the break state before clearing the flags. |
| bool debug_command_only = |
| StackGuard::IsDebugCommand() && !StackGuard::IsDebugBreak(); |
| |
| // Clear the debug break request flag. |
| StackGuard::Continue(DEBUGBREAK); |
| |
| ProcessDebugMesssages(debug_command_only); |
| |
| // Return to continue execution. |
| return Heap::undefined_value(); |
| } |
| |
| void Execution::ProcessDebugMesssages(bool debug_command_only) { |
| // Clear the debug command request flag. |
| StackGuard::Continue(DEBUGCOMMAND); |
| |
| HandleScope scope; |
| // Enter the debugger. Just continue if we fail to enter the debugger. |
| EnterDebugger debugger; |
| if (debugger.FailedToEnter()) { |
| return; |
| } |
| |
| // Notify the debug event listeners. Indicate auto continue if the break was |
| // a debug command break. |
| Debugger::OnDebugBreak(Factory::undefined_value(), debug_command_only); |
| } |
| |
| |
| #endif |
| |
| MaybeObject* Execution::HandleStackGuardInterrupt() { |
| #ifdef ENABLE_DEBUGGER_SUPPORT |
| if (StackGuard::IsDebugBreak() || StackGuard::IsDebugCommand()) { |
| DebugBreakHelper(); |
| } |
| #endif |
| if (StackGuard::IsPreempted()) RuntimePreempt(); |
| if (StackGuard::IsTerminateExecution()) { |
| StackGuard::Continue(TERMINATE); |
| return Top::TerminateExecution(); |
| } |
| if (StackGuard::IsInterrupted()) { |
| // interrupt |
| StackGuard::Continue(INTERRUPT); |
| return Top::StackOverflow(); |
| } |
| return Heap::undefined_value(); |
| } |
| |
| // --- G C E x t e n s i o n --- |
| |
| const char* const GCExtension::kSource = "native function gc();"; |
| |
| |
| v8::Handle<v8::FunctionTemplate> GCExtension::GetNativeFunction( |
| v8::Handle<v8::String> str) { |
| return v8::FunctionTemplate::New(GCExtension::GC); |
| } |
| |
| |
| v8::Handle<v8::Value> GCExtension::GC(const v8::Arguments& args) { |
| // All allocation spaces other than NEW_SPACE have the same effect. |
| Heap::CollectAllGarbage(false); |
| return v8::Undefined(); |
| } |
| |
| |
| static GCExtension gc_extension; |
| static v8::DeclareExtension gc_extension_declaration(&gc_extension); |
| |
| |
| // --- E x t e r n a l i z e S t r i n g E x t e n s i o n --- |
| |
| |
| template <typename Char, typename Base> |
| class SimpleStringResource : public Base { |
| public: |
| // Takes ownership of |data|. |
| SimpleStringResource(Char* data, size_t length) |
| : data_(data), |
| length_(length) {} |
| |
| virtual ~SimpleStringResource() { delete[] data_; } |
| |
| virtual const Char* data() const { return data_; } |
| |
| virtual size_t length() const { return length_; } |
| |
| private: |
| Char* const data_; |
| const size_t length_; |
| }; |
| |
| |
| typedef SimpleStringResource<char, v8::String::ExternalAsciiStringResource> |
| SimpleAsciiStringResource; |
| typedef SimpleStringResource<uc16, v8::String::ExternalStringResource> |
| SimpleTwoByteStringResource; |
| |
| |
| const char* const ExternalizeStringExtension::kSource = |
| "native function externalizeString();" |
| "native function isAsciiString();"; |
| |
| |
| v8::Handle<v8::FunctionTemplate> ExternalizeStringExtension::GetNativeFunction( |
| v8::Handle<v8::String> str) { |
| if (strcmp(*v8::String::AsciiValue(str), "externalizeString") == 0) { |
| return v8::FunctionTemplate::New(ExternalizeStringExtension::Externalize); |
| } else { |
| ASSERT(strcmp(*v8::String::AsciiValue(str), "isAsciiString") == 0); |
| return v8::FunctionTemplate::New(ExternalizeStringExtension::IsAscii); |
| } |
| } |
| |
| |
| v8::Handle<v8::Value> ExternalizeStringExtension::Externalize( |
| const v8::Arguments& args) { |
| if (args.Length() < 1 || !args[0]->IsString()) { |
| return v8::ThrowException(v8::String::New( |
| "First parameter to externalizeString() must be a string.")); |
| } |
| bool force_two_byte = false; |
| if (args.Length() >= 2) { |
| if (args[1]->IsBoolean()) { |
| force_two_byte = args[1]->BooleanValue(); |
| } else { |
| return v8::ThrowException(v8::String::New( |
| "Second parameter to externalizeString() must be a boolean.")); |
| } |
| } |
| bool result = false; |
| Handle<String> string = Utils::OpenHandle(*args[0].As<v8::String>()); |
| if (string->IsExternalString()) { |
| return v8::ThrowException(v8::String::New( |
| "externalizeString() can't externalize twice.")); |
| } |
| if (string->IsAsciiRepresentation() && !force_two_byte) { |
| char* data = new char[string->length()]; |
| String::WriteToFlat(*string, data, 0, string->length()); |
| SimpleAsciiStringResource* resource = new SimpleAsciiStringResource( |
| data, string->length()); |
| result = string->MakeExternal(resource); |
| if (result && !string->IsSymbol()) { |
| i::ExternalStringTable::AddString(*string); |
| } |
| } else { |
| uc16* data = new uc16[string->length()]; |
| String::WriteToFlat(*string, data, 0, string->length()); |
| SimpleTwoByteStringResource* resource = new SimpleTwoByteStringResource( |
| data, string->length()); |
| result = string->MakeExternal(resource); |
| if (result && !string->IsSymbol()) { |
| i::ExternalStringTable::AddString(*string); |
| } |
| } |
| if (!result) { |
| return v8::ThrowException(v8::String::New("externalizeString() failed.")); |
| } |
| return v8::Undefined(); |
| } |
| |
| |
| v8::Handle<v8::Value> ExternalizeStringExtension::IsAscii( |
| const v8::Arguments& args) { |
| if (args.Length() != 1 || !args[0]->IsString()) { |
| return v8::ThrowException(v8::String::New( |
| "isAsciiString() requires a single string argument.")); |
| } |
| return Utils::OpenHandle(*args[0].As<v8::String>())->IsAsciiRepresentation() ? |
| v8::True() : v8::False(); |
| } |
| |
| |
| static ExternalizeStringExtension externalize_extension; |
| static v8::DeclareExtension externalize_extension_declaration( |
| &externalize_extension); |
| |
| } } // namespace v8::internal |