diff options
Diffstat (limited to 'deps/v8/src/runtime.cc')
| -rw-r--r-- | deps/v8/src/runtime.cc | 504 |
1 files changed, 331 insertions, 173 deletions
diff --git a/deps/v8/src/runtime.cc b/deps/v8/src/runtime.cc index 320ab59f3c..0b80effbf2 100644 --- a/deps/v8/src/runtime.cc +++ b/deps/v8/src/runtime.cc @@ -1289,90 +1289,79 @@ RUNTIME_FUNCTION(MaybeObject*, Runtime_DeclareGlobals) { // We have to declare a global const property. To capture we only // assign to it when evaluating the assignment for "const x = // <expr>" the initial value is the hole. - bool is_const_property = value->IsTheHole(); - bool is_function_declaration = false; - if (value->IsUndefined() || is_const_property) { + bool is_var = value->IsUndefined(); + bool is_const = value->IsTheHole(); + bool is_function = value->IsSharedFunctionInfo(); + bool is_module = value->IsJSModule(); + ASSERT(is_var + is_const + is_function + is_module == 1); + + if (is_var || is_const) { // Lookup the property in the global object, and don't set the // value of the variable if the property is already there. + // Do the lookup locally only, see ES5 errata. LookupResult lookup(isolate); - global->Lookup(*name, &lookup); + if (FLAG_es52_globals) + global->LocalLookup(*name, &lookup); + else + global->Lookup(*name, &lookup); if (lookup.IsProperty()) { // We found an existing property. Unless it was an interceptor // that claims the property is absent, skip this declaration. - if (lookup.type() != INTERCEPTOR) { - continue; - } + if (lookup.type() != INTERCEPTOR) continue; PropertyAttributes attributes = global->GetPropertyAttribute(*name); - if (attributes != ABSENT) { - continue; - } + if (attributes != ABSENT) continue; // Fall-through and introduce the absent property by using // SetProperty. } - } else { - is_function_declaration = true; + } else if (is_function) { // Copy the function and update its context. Use it as value. Handle<SharedFunctionInfo> shared = Handle<SharedFunctionInfo>::cast(value); Handle<JSFunction> function = - isolate->factory()->NewFunctionFromSharedFunctionInfo(shared, - context, - TENURED); + isolate->factory()->NewFunctionFromSharedFunctionInfo( + shared, context, TENURED); value = function; } LookupResult lookup(isolate); global->LocalLookup(*name, &lookup); - // Compute the property attributes. According to ECMA-262, section - // 13, page 71, the property must be read-only and - // non-deletable. However, neither SpiderMonkey nor KJS creates the - // property as read-only, so we don't either. + // Compute the property attributes. According to ECMA-262, + // the property must be non-configurable except in eval. int attr = NONE; - if (!DeclareGlobalsEvalFlag::decode(flags)) { + bool is_eval = DeclareGlobalsEvalFlag::decode(flags); + if (!is_eval || is_module) { attr |= DONT_DELETE; } bool is_native = DeclareGlobalsNativeFlag::decode(flags); - if (is_const_property || (is_native && is_function_declaration)) { + if (is_const || is_module || (is_native && is_function)) { attr |= READ_ONLY; } LanguageMode language_mode = DeclareGlobalsLanguageMode::decode(flags); - // Safari does not allow the invocation of callback setters for - // function declarations. To mimic this behavior, we do not allow - // the invocation of setters for function values. This makes a - // difference for global functions with the same names as event - // handlers such as "function onload() {}". Firefox does call the - // onload setter in those case and Safari does not. We follow - // Safari for compatibility. - if (is_function_declaration) { - if (lookup.IsProperty() && (lookup.type() != INTERCEPTOR)) { - // Do not overwrite READ_ONLY properties. - if (lookup.GetAttributes() & READ_ONLY) { - if (language_mode != CLASSIC_MODE) { - Handle<Object> args[] = { name }; - return isolate->Throw(*isolate->factory()->NewTypeError( - "strict_cannot_assign", HandleVector(args, ARRAY_SIZE(args)))); - } - continue; + if (!lookup.IsProperty() || is_function || is_module) { + // If the local property exists, check that we can reconfigure it + // as required for function declarations. + if (lookup.IsProperty() && lookup.IsDontDelete()) { + if (lookup.IsReadOnly() || lookup.IsDontEnum() || + lookup.type() == CALLBACKS) { + return ThrowRedeclarationError( + isolate, is_function ? "function" : "module", name); } - // Do not change DONT_DELETE to false from true. - attr |= lookup.GetAttributes() & DONT_DELETE; + // If the existing property is not configurable, keep its attributes. + attr = lookup.GetAttributes(); } - PropertyAttributes attributes = static_cast<PropertyAttributes>(attr); - - RETURN_IF_EMPTY_HANDLE( - isolate, - JSObject::SetLocalPropertyIgnoreAttributes(global, name, value, - attributes)); + // Define or redefine own property. + RETURN_IF_EMPTY_HANDLE(isolate, + JSObject::SetLocalPropertyIgnoreAttributes( + global, name, value, static_cast<PropertyAttributes>(attr))); } else { - RETURN_IF_EMPTY_HANDLE( - isolate, - JSReceiver::SetProperty(global, name, value, - static_cast<PropertyAttributes>(attr), - language_mode == CLASSIC_MODE - ? kNonStrictMode : kStrictMode)); + // Do a [[Put]] on the existing (own) property. + RETURN_IF_EMPTY_HANDLE(isolate, + JSObject::SetProperty( + global, name, value, static_cast<PropertyAttributes>(attr), + language_mode == CLASSIC_MODE ? kNonStrictMode : kStrictMode)); } } @@ -1405,6 +1394,8 @@ RUNTIME_FUNCTION(MaybeObject*, Runtime_DeclareContextSlot) { if (attributes != ABSENT) { // The name was declared before; check for conflicting re-declarations. + // Note: this is actually inconsistent with what happens for globals (where + // we silently ignore such declarations). if (((attributes & READ_ONLY) != 0) || (mode == READ_ONLY)) { // Functions are not read-only. ASSERT(mode != READ_ONLY || initial_value->IsTheHole()); @@ -1467,9 +1458,14 @@ RUNTIME_FUNCTION(MaybeObject*, Runtime_DeclareContextSlot) { return ThrowRedeclarationError(isolate, "const", name); } } - RETURN_IF_EMPTY_HANDLE( - isolate, - JSReceiver::SetProperty(object, name, value, mode, kNonStrictMode)); + if (object->IsJSGlobalObject()) { + // Define own property on the global object. + RETURN_IF_EMPTY_HANDLE(isolate, + JSObject::SetLocalPropertyIgnoreAttributes(object, name, value, mode)); + } else { + RETURN_IF_EMPTY_HANDLE(isolate, + JSReceiver::SetProperty(object, name, value, mode, kNonStrictMode)); + } } return isolate->heap()->undefined_value(); @@ -1787,6 +1783,9 @@ RUNTIME_FUNCTION(MaybeObject*, Runtime_RegExpInitializeObject) { ASSERT(args.length() == 5); CONVERT_ARG_CHECKED(JSRegExp, regexp, 0); CONVERT_ARG_CHECKED(String, source, 1); + // If source is the empty string we set it to "(?:)" instead as + // suggested by ECMA-262, 5th, section 15.10.4.1. + if (source->length() == 0) source = isolate->heap()->query_colon_symbol(); Object* global = args[2]; if (!global->IsTrue()) global = isolate->heap()->false_value(); @@ -2101,7 +2100,7 @@ RUNTIME_FUNCTION(MaybeObject*, Runtime_FunctionSetReadOnlyPrototype) { DescriptorArray* instance_desc = function->map()->instance_descriptors(); int index = instance_desc->Search(name); ASSERT(index != DescriptorArray::kNotFound); - PropertyDetails details(instance_desc->GetDetails(index)); + PropertyDetails details = instance_desc->GetDetails(index); CallbacksDescriptor new_desc(name, instance_desc->GetValue(index), static_cast<PropertyAttributes>(details.attributes() | READ_ONLY), @@ -2886,12 +2885,79 @@ void FindStringIndicesDispatch(Isolate* isolate, } +// Two smis before and after the match, for very long strings. +const int kMaxBuilderEntriesPerRegExpMatch = 5; + + +static void SetLastMatchInfoNoCaptures(Handle<String> subject, + Handle<JSArray> last_match_info, + int match_start, + int match_end) { + // Fill last_match_info with a single capture. + last_match_info->EnsureSize(2 + RegExpImpl::kLastMatchOverhead); + AssertNoAllocation no_gc; + FixedArray* elements = FixedArray::cast(last_match_info->elements()); + RegExpImpl::SetLastCaptureCount(elements, 2); + RegExpImpl::SetLastInput(elements, *subject); + RegExpImpl::SetLastSubject(elements, *subject); + RegExpImpl::SetCapture(elements, 0, match_start); + RegExpImpl::SetCapture(elements, 1, match_end); +} + + +template <typename SubjectChar, typename PatternChar> +static bool SearchStringMultiple(Isolate* isolate, + Vector<const SubjectChar> subject, + Vector<const PatternChar> pattern, + String* pattern_string, + FixedArrayBuilder* builder, + int* match_pos) { + int pos = *match_pos; + int subject_length = subject.length(); + int pattern_length = pattern.length(); + int max_search_start = subject_length - pattern_length; + StringSearch<PatternChar, SubjectChar> search(isolate, pattern); + while (pos <= max_search_start) { + if (!builder->HasCapacity(kMaxBuilderEntriesPerRegExpMatch)) { + *match_pos = pos; + return false; + } + // Position of end of previous match. + int match_end = pos + pattern_length; + int new_pos = search.Search(subject, match_end); + if (new_pos >= 0) { + // A match. + if (new_pos > match_end) { + ReplacementStringBuilder::AddSubjectSlice(builder, + match_end, + new_pos); + } + pos = new_pos; + builder->Add(pattern_string); + } else { + break; + } + } + + if (pos < max_search_start) { + ReplacementStringBuilder::AddSubjectSlice(builder, + pos + pattern_length, + subject_length); + } + *match_pos = pos; + return true; +} + + + + template<typename ResultSeqString> -MUST_USE_RESULT static MaybeObject* StringReplaceStringWithString( +MUST_USE_RESULT static MaybeObject* StringReplaceAtomRegExpWithString( Isolate* isolate, Handle<String> subject, Handle<JSRegExp> pattern_regexp, - Handle<String> replacement) { + Handle<String> replacement, + Handle<JSArray> last_match_info) { ASSERT(subject->IsFlat()); ASSERT(replacement->IsFlat()); @@ -2950,6 +3016,12 @@ MUST_USE_RESULT static MaybeObject* StringReplaceStringWithString( subject_pos, subject_len); } + + SetLastMatchInfoNoCaptures(subject, + last_match_info, + indices.at(matches - 1), + indices.at(matches - 1) + pattern_len); + return *result; } @@ -2998,11 +3070,19 @@ MUST_USE_RESULT static MaybeObject* StringReplaceRegExpWithString( compiled_replacement.simple_hint()) { if (subject_handle->HasOnlyAsciiChars() && replacement_handle->HasOnlyAsciiChars()) { - return StringReplaceStringWithString<SeqAsciiString>( - isolate, subject_handle, regexp_handle, replacement_handle); + return StringReplaceAtomRegExpWithString<SeqAsciiString>( + isolate, + subject_handle, + regexp_handle, + replacement_handle, + last_match_info_handle); } else { - return StringReplaceStringWithString<SeqTwoByteString>( - isolate, subject_handle, regexp_handle, replacement_handle); + return StringReplaceAtomRegExpWithString<SeqTwoByteString>( + isolate, + subject_handle, + regexp_handle, + replacement_handle, + last_match_info_handle); } } @@ -3091,21 +3171,29 @@ MUST_USE_RESULT static MaybeObject* StringReplaceRegExpWithEmptyString( Handle<String> subject_handle(subject); Handle<JSRegExp> regexp_handle(regexp); + Handle<JSArray> last_match_info_handle(last_match_info); // Shortcut for simple non-regexp global replacements if (regexp_handle->GetFlags().is_global() && regexp_handle->TypeTag() == JSRegExp::ATOM) { Handle<String> empty_string_handle(HEAP->empty_string()); if (subject_handle->HasOnlyAsciiChars()) { - return StringReplaceStringWithString<SeqAsciiString>( - isolate, subject_handle, regexp_handle, empty_string_handle); + return StringReplaceAtomRegExpWithString<SeqAsciiString>( + isolate, + subject_handle, + regexp_handle, + empty_string_handle, + last_match_info_handle); } else { - return StringReplaceStringWithString<SeqTwoByteString>( - isolate, subject_handle, regexp_handle, empty_string_handle); + return StringReplaceAtomRegExpWithString<SeqTwoByteString>( + isolate, + subject_handle, + regexp_handle, + empty_string_handle, + last_match_info_handle); } } - Handle<JSArray> last_match_info_handle(last_match_info); Handle<Object> match = RegExpImpl::Exec(regexp_handle, subject_handle, 0, @@ -3125,6 +3213,10 @@ MUST_USE_RESULT static MaybeObject* StringReplaceRegExpWithEmptyString( end = RegExpImpl::GetCapture(match_info_array, 1); } + bool global = regexp_handle->GetFlags().is_global(); + + if (start == end && !global) return *subject_handle; + int length = subject_handle->length(); int new_length = length - (end - start); if (new_length == 0) { @@ -3140,7 +3232,7 @@ MUST_USE_RESULT static MaybeObject* StringReplaceRegExpWithEmptyString( } // If the regexp isn't global, only match once. - if (!regexp_handle->GetFlags().is_global()) { + if (!global) { if (start > 0) { String::WriteToFlat(*subject_handle, answer->GetChars(), @@ -3639,70 +3731,6 @@ RUNTIME_FUNCTION(MaybeObject*, Runtime_StringMatch) { } -// Two smis before and after the match, for very long strings. -const int kMaxBuilderEntriesPerRegExpMatch = 5; - - -static void SetLastMatchInfoNoCaptures(Handle<String> subject, - Handle<JSArray> last_match_info, - int match_start, - int match_end) { - // Fill last_match_info with a single capture. - last_match_info->EnsureSize(2 + RegExpImpl::kLastMatchOverhead); - AssertNoAllocation no_gc; - FixedArray* elements = FixedArray::cast(last_match_info->elements()); - RegExpImpl::SetLastCaptureCount(elements, 2); - RegExpImpl::SetLastInput(elements, *subject); - RegExpImpl::SetLastSubject(elements, *subject); - RegExpImpl::SetCapture(elements, 0, match_start); - RegExpImpl::SetCapture(elements, 1, match_end); -} - - -template <typename SubjectChar, typename PatternChar> -static bool SearchStringMultiple(Isolate* isolate, - Vector<const SubjectChar> subject, - Vector<const PatternChar> pattern, - String* pattern_string, - FixedArrayBuilder* builder, - int* match_pos) { - int pos = *match_pos; - int subject_length = subject.length(); - int pattern_length = pattern.length(); - int max_search_start = subject_length - pattern_length; - StringSearch<PatternChar, SubjectChar> search(isolate, pattern); - while (pos <= max_search_start) { - if (!builder->HasCapacity(kMaxBuilderEntriesPerRegExpMatch)) { - *match_pos = pos; - return false; - } - // Position of end of previous match. - int match_end = pos + pattern_length; - int new_pos = search.Search(subject, match_end); - if (new_pos >= 0) { - // A match. - if (new_pos > match_end) { - ReplacementStringBuilder::AddSubjectSlice(builder, - match_end, - new_pos); - } - pos = new_pos; - builder->Add(pattern_string); - } else { - break; - } - } - - if (pos < max_search_start) { - ReplacementStringBuilder::AddSubjectSlice(builder, - pos + pattern_length, - subject_length); - } - *match_pos = pos; - return true; -} - - static bool SearchStringMultiple(Isolate* isolate, Handle<String> subject, Handle<String> pattern, @@ -3842,6 +3870,8 @@ static RegExpImpl::IrregexpResult SearchRegExpNoCaptureMultiple( } +// Only called from Runtime_RegExpExecMultiple so it doesn't need to maintain +// separate last match info. See comment on that function. static RegExpImpl::IrregexpResult SearchRegExpMultiple( Isolate* isolate, Handle<String> subject, @@ -3870,10 +3900,6 @@ static RegExpImpl::IrregexpResult SearchRegExpMultiple( // End of previous match. Differs from pos if match was empty. int match_end = 0; if (result == RegExpImpl::RE_SUCCESS) { - // Need to keep a copy of the previous match for creating last_match_info - // at the end, so we have two vectors that we swap between. - OffsetsVector registers2(required_registers, isolate); - Vector<int> prev_register_vector(registers2.vector(), registers2.length()); bool first = true; do { int match_start = register_vector[0]; @@ -3926,11 +3952,6 @@ static RegExpImpl::IrregexpResult SearchRegExpMultiple( elements->set(capture_count + 2, *subject); builder->Add(*isolate->factory()->NewJSArrayWithElements(elements)); } - // Swap register vectors, so the last successful match is in - // prev_register_vector. - Vector<int32_t> tmp = prev_register_vector; - prev_register_vector = register_vector; - register_vector = tmp; if (match_end > match_start) { pos = match_end; @@ -3962,12 +3983,12 @@ static RegExpImpl::IrregexpResult SearchRegExpMultiple( last_match_array->EnsureSize(last_match_array_size); AssertNoAllocation no_gc; FixedArray* elements = FixedArray::cast(last_match_array->elements()); + // We have to set this even though the rest of the last match array is + // ignored. RegExpImpl::SetLastCaptureCount(elements, last_match_capture_count); + // These are also read without consulting the override. RegExpImpl::SetLastSubject(elements, *subject); RegExpImpl::SetLastInput(elements, *subject); - for (int i = 0; i < last_match_capture_count; i++) { - RegExpImpl::SetCapture(elements, i, prev_register_vector[i]); - } return RegExpImpl::RE_SUCCESS; } } @@ -3976,6 +3997,9 @@ static RegExpImpl::IrregexpResult SearchRegExpMultiple( } +// This is only called for StringReplaceGlobalRegExpWithFunction. This sets +// lastMatchInfoOverride to maintain the last match info, so we don't need to +// set any other last match array info. RUNTIME_FUNCTION(MaybeObject*, Runtime_RegExpExecMultiple) { ASSERT(args.length() == 4); HandleScope handles(isolate); @@ -4669,7 +4693,7 @@ RUNTIME_FUNCTION(MaybeObject*, Runtime_StoreArrayLiteralElement) { HandleScope scope; Object* raw_boilerplate_object = literals->get(literal_index); - Handle<JSArray> boilerplate_object(JSArray::cast(raw_boilerplate_object)); + Handle<JSArray> boilerplate(JSArray::cast(raw_boilerplate_object)); #if DEBUG ElementsKind elements_kind = object->GetElementsKind(); #endif @@ -4680,25 +4704,59 @@ RUNTIME_FUNCTION(MaybeObject*, Runtime_StoreArrayLiteralElement) { if (value->IsNumber()) { ASSERT(elements_kind == FAST_SMI_ONLY_ELEMENTS); JSObject::TransitionElementsKind(object, FAST_DOUBLE_ELEMENTS); - JSObject::TransitionElementsKind(boilerplate_object, FAST_DOUBLE_ELEMENTS); + if (IsMoreGeneralElementsKindTransition(boilerplate->GetElementsKind(), + FAST_DOUBLE_ELEMENTS)) { + JSObject::TransitionElementsKind(boilerplate, FAST_DOUBLE_ELEMENTS); + } ASSERT(object->GetElementsKind() == FAST_DOUBLE_ELEMENTS); - FixedDoubleArray* double_array = - FixedDoubleArray::cast(object->elements()); + FixedDoubleArray* double_array = FixedDoubleArray::cast(object->elements()); HeapNumber* number = HeapNumber::cast(*value); double_array->set(store_index, number->Number()); } else { ASSERT(elements_kind == FAST_SMI_ONLY_ELEMENTS || elements_kind == FAST_DOUBLE_ELEMENTS); JSObject::TransitionElementsKind(object, FAST_ELEMENTS); - JSObject::TransitionElementsKind(boilerplate_object, FAST_ELEMENTS); - FixedArray* object_array = - FixedArray::cast(object->elements()); + if (IsMoreGeneralElementsKindTransition(boilerplate->GetElementsKind(), + FAST_ELEMENTS)) { + JSObject::TransitionElementsKind(boilerplate, FAST_ELEMENTS); + } + FixedArray* object_array = FixedArray::cast(object->elements()); object_array->set(store_index, *value); } return *object; } +// Check whether debugger and is about to step into the callback that is passed +// to a built-in function such as Array.forEach. +RUNTIME_FUNCTION(MaybeObject*, Runtime_DebugCallbackSupportsStepping) { + if (!isolate->IsDebuggerActive()) return isolate->heap()->false_value(); + CONVERT_ARG_CHECKED(Object, callback, 0); + // We do not step into the callback if it's a builtin or not even a function. + if (!callback->IsJSFunction() || JSFunction::cast(callback)->IsBuiltin()) { + return isolate->heap()->false_value(); + } + return isolate->heap()->true_value(); +} + + +// Set one shot breakpoints for the callback function that is passed to a +// built-in function such as Array.forEach to enable stepping into the callback. +RUNTIME_FUNCTION(MaybeObject*, Runtime_DebugPrepareStepInIfStepping) { + Debug* debug = isolate->debug(); + if (!debug->IsStepping()) return NULL; + CONVERT_ARG_CHECKED(Object, callback, 0); + HandleScope scope(isolate); + Handle<SharedFunctionInfo> shared_info(JSFunction::cast(callback)->shared()); + // When leaving the callback, step out has been activated, but not performed + // if we do not leave the builtin. To be able to step into the callback + // again, we need to clear the step out at this point. + debug->ClearStepOut(); + debug->FloodWithOneShot(shared_info); + return NULL; +} + + // Set a local property, even if it is READ_ONLY. If the property does not // exist, it will be added with attributes NONE. RUNTIME_FUNCTION(MaybeObject*, Runtime_IgnoreAttributesAndSetProperty) { @@ -7582,7 +7640,7 @@ RUNTIME_FUNCTION(MaybeObject*, Runtime_DateSetValue) { } } date->SetValue(value, is_value_nan); - return *date; + return value; } @@ -8043,8 +8101,6 @@ RUNTIME_FUNCTION(MaybeObject*, Runtime_LazyRecompile) { ASSERT(args.length() == 1); Handle<JSFunction> function = args.at<JSFunction>(0); - function->shared()->set_profiler_ticks(0); - // If the function is not compiled ignore the lazy // recompilation. This can happen if the debugger is activated and // the function is returned to the not compiled state. @@ -8067,6 +8123,7 @@ RUNTIME_FUNCTION(MaybeObject*, Runtime_LazyRecompile) { function->ReplaceCode(function->shared()->code()); return function->code(); } + function->shared()->code()->set_profiler_ticks(0); if (JSFunction::CompileOptimized(function, AstNode::kNoNumber, CLEAR_EXCEPTION)) { @@ -8123,6 +8180,14 @@ static void MaterializeArgumentsObjectInFrame(Isolate* isolate, ASSERT(*arguments != isolate->heap()->undefined_value()); } frame->SetExpression(i, *arguments); + if (FLAG_trace_deopt) { + PrintF("Materializing arguments object for frame %p - %p: %p ", + reinterpret_cast<void*>(frame->sp()), + reinterpret_cast<void*>(frame->fp()), + reinterpret_cast<void*>(*arguments)); + arguments->ShortPrint(); + PrintF("\n"); + } } } } @@ -8212,6 +8277,19 @@ RUNTIME_FUNCTION(MaybeObject*, Runtime_DeoptimizeFunction) { } +RUNTIME_FUNCTION(MaybeObject*, Runtime_ClearFunctionTypeFeedback) { + HandleScope scope(isolate); + ASSERT(args.length() == 1); + CONVERT_ARG_HANDLE_CHECKED(JSFunction, function, 0); + Code* unoptimized = function->shared()->code(); + if (unoptimized->kind() == Code::FUNCTION) { + unoptimized->ClearInlineCaches(); + unoptimized->ClearTypeFeedbackCells(isolate->heap()); + } + return isolate->heap()->undefined_value(); +} + + RUNTIME_FUNCTION(MaybeObject*, Runtime_RunningInSimulator) { #if defined(USE_SIMULATOR) return isolate->heap()->true_value(); @@ -8251,10 +8329,13 @@ RUNTIME_FUNCTION(MaybeObject*, Runtime_GetOptimizationStatus) { if (!V8::UseCrankshaft()) { return Smi::FromInt(4); // 4 == "never". } + CONVERT_ARG_HANDLE_CHECKED(JSFunction, function, 0); if (FLAG_always_opt) { - return Smi::FromInt(3); // 3 == "always". + // We may have always opt, but that is more best-effort than a real + // promise, so we still say "no" if it is not optimized. + return function->IsOptimized() ? Smi::FromInt(3) // 3 == "always". + : Smi::FromInt(2); // 2 == "no". } - CONVERT_ARG_HANDLE_CHECKED(JSFunction, function, 0); return function->IsOptimized() ? Smi::FromInt(1) // 1 == "yes". : Smi::FromInt(2); // 2 == "no". } @@ -8358,14 +8439,10 @@ RUNTIME_FUNCTION(MaybeObject*, Runtime_CompileForOnStackReplacement) { PrintF("]\n"); } Handle<Code> check_code; -#if defined(V8_TARGET_ARCH_IA32) || \ - defined(V8_TARGET_ARCH_ARM) || \ - defined(V8_TARGET_ARCH_MIPS) if (FLAG_count_based_interrupts) { InterruptStub interrupt_stub; check_code = interrupt_stub.GetCode(); } else // NOLINT -#endif { // NOLINT StackCheckStub check_stub; check_code = check_stub.GetCode(); @@ -8399,6 +8476,12 @@ RUNTIME_FUNCTION(MaybeObject*, Runtime_CheckIsBootstrapping) { } +RUNTIME_FUNCTION(MaybeObject*, Runtime_GetRootNaN) { + RUNTIME_ASSERT(isolate->bootstrapper()->IsActive()); + return isolate->heap()->nan_value(); +} + + RUNTIME_FUNCTION(MaybeObject*, Runtime_Call) { HandleScope scope(isolate); ASSERT(args.length() >= 2); @@ -8598,6 +8681,25 @@ RUNTIME_FUNCTION(MaybeObject*, Runtime_PushBlockContext) { } +RUNTIME_FUNCTION(MaybeObject*, Runtime_PushModuleContext) { + NoHandleAllocation ha; + ASSERT(args.length() == 2); + CONVERT_ARG_CHECKED(ScopeInfo, scope_info, 0); + CONVERT_ARG_HANDLE_CHECKED(JSModule, instance, 1); + + Context* context; + MaybeObject* maybe_context = + isolate->heap()->AllocateModuleContext(isolate->context(), + scope_info); + if (!maybe_context->To(&context)) return maybe_context; + // Also initialize the context slot of the instance object. + instance->set_context(context); + isolate->set_context(context); + + return context; +} + + RUNTIME_FUNCTION(MaybeObject*, Runtime_DeleteContextSlot) { HandleScope scope(isolate); ASSERT(args.length() == 2); @@ -10929,10 +11031,10 @@ static Handle<JSObject> MaterializeModuleScope( } -// Iterate over the actual scopes visible from a stack frame. The iteration -// proceeds from the innermost visible nested scope outwards. All scopes are -// backed by an actual context except the local scope, which is inserted -// "artificially" in the context chain. +// Iterate over the actual scopes visible from a stack frame or from a closure. +// The iteration proceeds from the innermost visible nested scope outwards. +// All scopes are backed by an actual context except the local scope, +// which is inserted "artificially" in the context chain. class ScopeIterator { public: enum ScopeType { @@ -11033,6 +11135,18 @@ class ScopeIterator { } } + ScopeIterator(Isolate* isolate, + Handle<JSFunction> function) + : isolate_(isolate), + frame_(NULL), + inlined_jsframe_index_(0), + function_(function), + context_(function->context()) { + if (function->IsBuiltin()) { + context_ = Handle<Context>(); + } + } + // More scopes? bool Done() { return context_.is_null(); } @@ -11253,6 +11367,22 @@ static const int kScopeDetailsTypeIndex = 0; static const int kScopeDetailsObjectIndex = 1; static const int kScopeDetailsSize = 2; + +static MaybeObject* MaterializeScopeDetails(Isolate* isolate, + ScopeIterator* it) { + // Calculate the size of the result. + int details_size = kScopeDetailsSize; + Handle<FixedArray> details = isolate->factory()->NewFixedArray(details_size); + + // Fill in scope details. + details->set(kScopeDetailsTypeIndex, Smi::FromInt(it->Type())); + Handle<JSObject> scope_object = it->ScopeObject(); + RETURN_IF_EMPTY_HANDLE(isolate, scope_object); + details->set(kScopeDetailsObjectIndex, *scope_object); + + return *isolate->factory()->NewJSArrayWithElements(details); +} + // Return an array with scope details // args[0]: number: break id // args[1]: number: frame index @@ -11290,18 +11420,46 @@ RUNTIME_FUNCTION(MaybeObject*, Runtime_GetScopeDetails) { if (it.Done()) { return isolate->heap()->undefined_value(); } + return MaterializeScopeDetails(isolate, &it); +} - // Calculate the size of the result. - int details_size = kScopeDetailsSize; - Handle<FixedArray> details = isolate->factory()->NewFixedArray(details_size); - // Fill in scope details. - details->set(kScopeDetailsTypeIndex, Smi::FromInt(it.Type())); - Handle<JSObject> scope_object = it.ScopeObject(); - RETURN_IF_EMPTY_HANDLE(isolate, scope_object); - details->set(kScopeDetailsObjectIndex, *scope_object); +RUNTIME_FUNCTION(MaybeObject*, Runtime_GetFunctionScopeCount) { + HandleScope scope(isolate); + ASSERT(args.length() == 1); - return *isolate->factory()->NewJSArrayWithElements(details); + // Check arguments. + CONVERT_ARG_HANDLE_CHECKED(JSFunction, fun, 0); + + // Count the visible scopes. + int n = 0; + for (ScopeIterator it(isolate, fun); !it.Done(); it.Next()) { + n++; + } + + return Smi::FromInt(n); +} + + +RUNTIME_FUNCTION(MaybeObject*, Runtime_GetFunctionScopeDetails) { + HandleScope scope(isolate); + ASSERT(args.length() == 2); + + // Check arguments. + CONVERT_ARG_HANDLE_CHECKED(JSFunction, fun, 0); + CONVERT_NUMBER_CHECKED(int, index, Int32, args[1]); + + // Find the requested scope. + int n = 0; + ScopeIterator it(isolate, fun); + for (; !it.Done() && n < index; it.Next()) { + n++; + } + if (it.Done()) { + return isolate->heap()->undefined_value(); + } + + return MaterializeScopeDetails(isolate, &it); } |