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|
// Copyright 2014 the V8 project authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "src/runtime/runtime-utils.h"
#include "src/accessors.h"
#include "src/arguments.h"
#include "src/compiler.h"
#include "src/deoptimizer.h"
#include "src/frames-inl.h"
#include "src/isolate-inl.h"
#include "src/messages.h"
#include "src/profiler/cpu-profiler.h"
namespace v8 {
namespace internal {
RUNTIME_FUNCTION(Runtime_FunctionGetName) {
SealHandleScope shs(isolate);
DCHECK(args.length() == 1);
CONVERT_ARG_CHECKED(JSFunction, f, 0);
return f->shared()->name();
}
RUNTIME_FUNCTION(Runtime_FunctionSetName) {
HandleScope scope(isolate);
DCHECK(args.length() == 2);
CONVERT_ARG_HANDLE_CHECKED(JSFunction, f, 0);
CONVERT_ARG_HANDLE_CHECKED(String, name, 1);
name = String::Flatten(name);
f->shared()->set_name(*name);
return isolate->heap()->undefined_value();
}
RUNTIME_FUNCTION(Runtime_FunctionNameShouldPrintAsAnonymous) {
SealHandleScope shs(isolate);
DCHECK(args.length() == 1);
CONVERT_ARG_CHECKED(JSFunction, f, 0);
return isolate->heap()->ToBoolean(
f->shared()->name_should_print_as_anonymous());
}
RUNTIME_FUNCTION(Runtime_CompleteFunctionConstruction) {
SealHandleScope shs(isolate);
DCHECK(args.length() == 3);
CONVERT_ARG_HANDLE_CHECKED(JSFunction, func, 0);
CONVERT_ARG_HANDLE_CHECKED(JSFunction, constructor, 1);
CONVERT_ARG_HANDLE_CHECKED(Object, new_target, 2);
func->shared()->set_name_should_print_as_anonymous(true);
// If new.target is equal to |constructor| then the function |func| created
// is already correctly setup and nothing else should be done here.
// But if new.target is not equal to |constructor| then we are have a
// Function builtin subclassing case and therefore the function |func|
// has wrong initial map. To fix that we create a new function object with
// correct initial map.
if (new_target->IsUndefined() || *constructor == *new_target) {
return *func;
}
// Create a new JSFunction object with correct initial map.
HandleScope handle_scope(isolate);
Handle<JSFunction> original_constructor =
Handle<JSFunction>::cast(new_target);
DCHECK(constructor->has_initial_map());
Handle<Map> initial_map =
JSFunction::EnsureDerivedHasInitialMap(original_constructor, constructor);
Handle<SharedFunctionInfo> shared_info(func->shared(), isolate);
Handle<Context> context(func->context(), isolate);
Handle<JSFunction> result =
isolate->factory()->NewFunctionFromSharedFunctionInfo(
initial_map, shared_info, context, NOT_TENURED);
DCHECK_EQ(func->IsConstructor(), result->IsConstructor());
return *result;
}
RUNTIME_FUNCTION(Runtime_FunctionIsArrow) {
SealHandleScope shs(isolate);
DCHECK(args.length() == 1);
CONVERT_ARG_CHECKED(JSFunction, f, 0);
return isolate->heap()->ToBoolean(f->shared()->is_arrow());
}
RUNTIME_FUNCTION(Runtime_FunctionIsConciseMethod) {
SealHandleScope shs(isolate);
DCHECK(args.length() == 1);
CONVERT_ARG_CHECKED(JSFunction, f, 0);
return isolate->heap()->ToBoolean(f->shared()->is_concise_method());
}
RUNTIME_FUNCTION(Runtime_FunctionRemovePrototype) {
SealHandleScope shs(isolate);
DCHECK(args.length() == 1);
CONVERT_ARG_CHECKED(JSFunction, f, 0);
RUNTIME_ASSERT(f->RemovePrototype());
return isolate->heap()->undefined_value();
}
RUNTIME_FUNCTION(Runtime_FunctionGetScript) {
HandleScope scope(isolate);
DCHECK(args.length() == 1);
CONVERT_ARG_CHECKED(JSFunction, fun, 0);
Handle<Object> script = Handle<Object>(fun->shared()->script(), isolate);
if (!script->IsScript()) return isolate->heap()->undefined_value();
return *Script::GetWrapper(Handle<Script>::cast(script));
}
RUNTIME_FUNCTION(Runtime_FunctionGetSourceCode) {
HandleScope scope(isolate);
DCHECK(args.length() == 1);
CONVERT_ARG_HANDLE_CHECKED(JSFunction, f, 0);
Handle<SharedFunctionInfo> shared(f->shared());
return *shared->GetSourceCode();
}
RUNTIME_FUNCTION(Runtime_FunctionGetScriptSourcePosition) {
SealHandleScope shs(isolate);
DCHECK(args.length() == 1);
CONVERT_ARG_CHECKED(JSFunction, fun, 0);
int pos = fun->shared()->start_position();
return Smi::FromInt(pos);
}
RUNTIME_FUNCTION(Runtime_FunctionGetPositionForOffset) {
SealHandleScope shs(isolate);
DCHECK(args.length() == 2);
CONVERT_ARG_CHECKED(Code, code, 0);
CONVERT_NUMBER_CHECKED(int, offset, Int32, args[1]);
RUNTIME_ASSERT(0 <= offset && offset < code->Size());
Address pc = code->address() + offset;
return Smi::FromInt(code->SourcePosition(pc));
}
RUNTIME_FUNCTION(Runtime_FunctionSetInstanceClassName) {
SealHandleScope shs(isolate);
DCHECK(args.length() == 2);
CONVERT_ARG_CHECKED(JSFunction, fun, 0);
CONVERT_ARG_CHECKED(String, name, 1);
fun->shared()->set_instance_class_name(name);
return isolate->heap()->undefined_value();
}
RUNTIME_FUNCTION(Runtime_FunctionSetLength) {
SealHandleScope shs(isolate);
DCHECK(args.length() == 2);
CONVERT_ARG_CHECKED(JSFunction, fun, 0);
CONVERT_SMI_ARG_CHECKED(length, 1);
RUNTIME_ASSERT((length & 0xC0000000) == 0xC0000000 ||
(length & 0xC0000000) == 0x0);
fun->shared()->set_length(length);
return isolate->heap()->undefined_value();
}
RUNTIME_FUNCTION(Runtime_FunctionSetPrototype) {
HandleScope scope(isolate);
DCHECK(args.length() == 2);
CONVERT_ARG_HANDLE_CHECKED(JSFunction, fun, 0);
CONVERT_ARG_HANDLE_CHECKED(Object, value, 1);
RUNTIME_ASSERT(fun->IsConstructor());
RETURN_FAILURE_ON_EXCEPTION(isolate,
Accessors::FunctionSetPrototype(fun, value));
return args[0]; // return TOS
}
RUNTIME_FUNCTION(Runtime_FunctionIsAPIFunction) {
SealHandleScope shs(isolate);
DCHECK(args.length() == 1);
CONVERT_ARG_CHECKED(JSFunction, f, 0);
return isolate->heap()->ToBoolean(f->shared()->IsApiFunction());
}
RUNTIME_FUNCTION(Runtime_FunctionHidesSource) {
SealHandleScope shs(isolate);
DCHECK(args.length() == 1);
CONVERT_ARG_CHECKED(JSFunction, f, 0);
SharedFunctionInfo* shared = f->shared();
bool hide_source = !shared->script()->IsScript() ||
Script::cast(shared->script())->hide_source();
return isolate->heap()->ToBoolean(hide_source);
}
RUNTIME_FUNCTION(Runtime_SetCode) {
HandleScope scope(isolate);
DCHECK(args.length() == 2);
CONVERT_ARG_HANDLE_CHECKED(JSFunction, target, 0);
CONVERT_ARG_HANDLE_CHECKED(JSFunction, source, 1);
Handle<SharedFunctionInfo> target_shared(target->shared());
Handle<SharedFunctionInfo> source_shared(source->shared());
RUNTIME_ASSERT(!source_shared->bound());
if (!Compiler::Compile(source, KEEP_EXCEPTION)) {
return isolate->heap()->exception();
}
// Mark both, the source and the target, as un-flushable because the
// shared unoptimized code makes them impossible to enqueue in a list.
DCHECK(target_shared->code()->gc_metadata() == NULL);
DCHECK(source_shared->code()->gc_metadata() == NULL);
target_shared->set_dont_flush(true);
source_shared->set_dont_flush(true);
// Set the code, scope info, formal parameter count, and the length
// of the target shared function info.
target_shared->ReplaceCode(source_shared->code());
target_shared->set_scope_info(source_shared->scope_info());
target_shared->set_length(source_shared->length());
target_shared->set_feedback_vector(source_shared->feedback_vector());
target_shared->set_internal_formal_parameter_count(
source_shared->internal_formal_parameter_count());
target_shared->set_start_position_and_type(
source_shared->start_position_and_type());
target_shared->set_end_position(source_shared->end_position());
bool was_native = target_shared->native();
target_shared->set_compiler_hints(source_shared->compiler_hints());
target_shared->set_opt_count_and_bailout_reason(
source_shared->opt_count_and_bailout_reason());
target_shared->set_native(was_native);
target_shared->set_profiler_ticks(source_shared->profiler_ticks());
SharedFunctionInfo::SetScript(
target_shared, Handle<Object>(source_shared->script(), isolate));
// Set the code of the target function.
target->ReplaceCode(source_shared->code());
DCHECK(target->next_function_link()->IsUndefined());
// Make sure we get a fresh copy of the literal vector to avoid cross
// context contamination.
Handle<Context> context(source->context());
target->set_context(*context);
int number_of_literals = source->NumberOfLiterals();
Handle<LiteralsArray> literals =
LiteralsArray::New(isolate, handle(target_shared->feedback_vector()),
number_of_literals, TENURED);
target->set_literals(*literals);
if (isolate->logger()->is_logging_code_events() ||
isolate->cpu_profiler()->is_profiling()) {
isolate->logger()->LogExistingFunction(source_shared,
Handle<Code>(source_shared->code()));
}
return *target;
}
// Set the native flag on the function.
// This is used to decide if we should transform null and undefined
// into the global object when doing call and apply.
RUNTIME_FUNCTION(Runtime_SetNativeFlag) {
SealHandleScope shs(isolate);
RUNTIME_ASSERT(args.length() == 1);
CONVERT_ARG_CHECKED(Object, object, 0);
if (object->IsJSFunction()) {
JSFunction* func = JSFunction::cast(object);
func->shared()->set_native(true);
}
return isolate->heap()->undefined_value();
}
RUNTIME_FUNCTION(Runtime_IsConstructor) {
SealHandleScope shs(isolate);
DCHECK_EQ(1, args.length());
CONVERT_ARG_CHECKED(Object, object, 0);
return isolate->heap()->ToBoolean(object->IsConstructor());
}
RUNTIME_FUNCTION(Runtime_SetForceInlineFlag) {
SealHandleScope shs(isolate);
RUNTIME_ASSERT(args.length() == 1);
CONVERT_ARG_HANDLE_CHECKED(Object, object, 0);
if (object->IsJSFunction()) {
JSFunction* func = JSFunction::cast(*object);
func->shared()->set_force_inline(true);
}
return isolate->heap()->undefined_value();
}
// Find the arguments of the JavaScript function invocation that called
// into C++ code. Collect these in a newly allocated array of handles (possibly
// prefixed by a number of empty handles).
base::SmartArrayPointer<Handle<Object>> Runtime::GetCallerArguments(
Isolate* isolate, int prefix_argc, int* total_argc) {
// Find frame containing arguments passed to the caller.
JavaScriptFrameIterator it(isolate);
JavaScriptFrame* frame = it.frame();
List<JSFunction*> functions(2);
frame->GetFunctions(&functions);
if (functions.length() > 1) {
int inlined_jsframe_index = functions.length() - 1;
TranslatedState translated_values(frame);
translated_values.Prepare(false, frame->fp());
int argument_count = 0;
TranslatedFrame* translated_frame =
translated_values.GetArgumentsInfoFromJSFrameIndex(
inlined_jsframe_index, &argument_count);
TranslatedFrame::iterator iter = translated_frame->begin();
// Skip the function.
iter++;
// Skip the receiver.
iter++;
argument_count--;
*total_argc = prefix_argc + argument_count;
base::SmartArrayPointer<Handle<Object> > param_data(
NewArray<Handle<Object> >(*total_argc));
bool should_deoptimize = false;
for (int i = 0; i < argument_count; i++) {
should_deoptimize = should_deoptimize || iter->IsMaterializedObject();
Handle<Object> value = iter->GetValue();
param_data[prefix_argc + i] = value;
iter++;
}
if (should_deoptimize) {
translated_values.StoreMaterializedValuesAndDeopt();
}
return param_data;
} else {
it.AdvanceToArgumentsFrame();
frame = it.frame();
int args_count = frame->ComputeParametersCount();
*total_argc = prefix_argc + args_count;
base::SmartArrayPointer<Handle<Object> > param_data(
NewArray<Handle<Object> >(*total_argc));
for (int i = 0; i < args_count; i++) {
Handle<Object> val = Handle<Object>(frame->GetParameter(i), isolate);
param_data[prefix_argc + i] = val;
}
return param_data;
}
}
RUNTIME_FUNCTION(Runtime_FunctionBindArguments) {
HandleScope scope(isolate);
DCHECK(args.length() == 4);
CONVERT_ARG_HANDLE_CHECKED(JSFunction, bound_function, 0);
CONVERT_ARG_HANDLE_CHECKED(JSReceiver, bindee, 1);
CONVERT_ARG_HANDLE_CHECKED(Object, this_object, 2);
CONVERT_NUMBER_ARG_HANDLE_CHECKED(new_length, 3);
// TODO(lrn): Create bound function in C++ code from premade shared info.
bound_function->shared()->set_bound(true);
bound_function->shared()->set_optimized_code_map(Smi::FromInt(0));
bound_function->shared()->set_inferred_name(isolate->heap()->empty_string());
// Get all arguments of calling function (Function.prototype.bind).
int argc = 0;
base::SmartArrayPointer<Handle<Object>> arguments =
Runtime::GetCallerArguments(isolate, 0, &argc);
// Don't count the this-arg.
if (argc > 0) {
RUNTIME_ASSERT(arguments[0].is_identical_to(this_object));
argc--;
} else {
RUNTIME_ASSERT(this_object->IsUndefined());
}
// Initialize array of bindings (function, this, and any existing arguments
// if the function was already bound).
Handle<BindingsArray> new_bindings;
int out_index = 0;
Handle<TypeFeedbackVector> vector(
bound_function->shared()->feedback_vector());
if (bindee->IsJSFunction() && JSFunction::cast(*bindee)->shared()->bound()) {
Handle<BindingsArray> old_bindings(
JSFunction::cast(*bindee)->function_bindings());
RUNTIME_ASSERT(old_bindings->bindings_count() >= 0);
bindee = handle(old_bindings->bound_function(), isolate);
Handle<Object> old_bound_this(old_bindings->bound_this(), isolate);
new_bindings = BindingsArray::New(isolate, vector, bindee, old_bound_this,
old_bindings->bindings_count() + argc);
for (int n = old_bindings->bindings_count(); out_index < n; out_index++) {
new_bindings->set_binding(out_index, old_bindings->binding(out_index));
}
} else {
new_bindings =
BindingsArray::New(isolate, vector, bindee, this_object, argc);
}
// Copy arguments, skipping the first which is "this_arg".
for (int j = 0; j < argc; j++, out_index++) {
new_bindings->set_binding(out_index, *arguments[j + 1]);
}
new_bindings->set_map_no_write_barrier(isolate->heap()->fixed_array_map());
bound_function->set_function_bindings(*new_bindings);
// Update length. Have to remove the prototype first so that map migration
// is happy about the number of fields.
RUNTIME_ASSERT(bound_function->RemovePrototype());
// The new function should have the same [[Prototype]] as the bindee.
Handle<Map> bound_function_map =
bindee->IsConstructor()
? isolate->bound_function_with_constructor_map()
: isolate->bound_function_without_constructor_map();
PrototypeIterator iter(isolate, bindee);
Handle<Object> proto = PrototypeIterator::GetCurrent(iter);
if (bound_function_map->prototype() != *proto) {
bound_function_map = Map::TransitionToPrototype(bound_function_map, proto,
REGULAR_PROTOTYPE);
}
JSObject::MigrateToMap(bound_function, bound_function_map);
DCHECK_EQ(bindee->IsConstructor(), bound_function->IsConstructor());
Handle<String> length_string = isolate->factory()->length_string();
// These attributes must be kept in sync with how the bootstrapper
// configures the bound_function_map retrieved above.
// We use ...IgnoreAttributes() here because of length's read-onliness.
PropertyAttributes attr =
static_cast<PropertyAttributes>(DONT_ENUM | READ_ONLY);
RETURN_FAILURE_ON_EXCEPTION(
isolate, JSObject::SetOwnPropertyIgnoreAttributes(
bound_function, length_string, new_length, attr));
return *bound_function;
}
RUNTIME_FUNCTION(Runtime_BoundFunctionGetBindings) {
HandleScope handles(isolate);
DCHECK(args.length() == 1);
CONVERT_ARG_HANDLE_CHECKED(JSReceiver, callable, 0);
if (callable->IsJSFunction()) {
Handle<JSFunction> function = Handle<JSFunction>::cast(callable);
if (function->shared()->bound()) {
RUNTIME_ASSERT(function->function_bindings()->IsBindingsArray());
Handle<BindingsArray> bindings(function->function_bindings());
return *BindingsArray::CreateRuntimeBindings(bindings);
}
}
return isolate->heap()->undefined_value();
}
RUNTIME_FUNCTION(Runtime_NewObjectFromBound) {
HandleScope scope(isolate);
DCHECK(args.length() == 1);
// First argument is a function to use as a constructor.
CONVERT_ARG_HANDLE_CHECKED(JSFunction, function, 0);
RUNTIME_ASSERT(function->shared()->bound());
// The argument is a bound function. Extract its bound arguments
// and callable.
Handle<BindingsArray> bound_args =
handle(BindingsArray::cast(function->function_bindings()));
int bound_argc = bound_args->bindings_count();
Handle<Object> bound_function(bound_args->bound_function(), isolate);
DCHECK(!bound_function->IsJSFunction() ||
!Handle<JSFunction>::cast(bound_function)->shared()->bound());
int total_argc = 0;
base::SmartArrayPointer<Handle<Object>> param_data =
Runtime::GetCallerArguments(isolate, bound_argc, &total_argc);
for (int i = 0; i < bound_argc; i++) {
param_data[i] = handle(bound_args->binding(i), isolate);
}
Handle<Object> result;
ASSIGN_RETURN_FAILURE_ON_EXCEPTION(
isolate, result, Execution::New(isolate, bound_function, bound_function,
total_argc, param_data.get()));
return *result;
}
RUNTIME_FUNCTION(Runtime_Call) {
HandleScope scope(isolate);
DCHECK_LE(2, args.length());
int const argc = args.length() - 2;
CONVERT_ARG_HANDLE_CHECKED(JSReceiver, target, 0);
CONVERT_ARG_HANDLE_CHECKED(Object, receiver, 1);
ScopedVector<Handle<Object>> argv(argc);
for (int i = 0; i < argc; ++i) {
argv[i] = args.at<Object>(2 + i);
}
Handle<Object> result;
ASSIGN_RETURN_FAILURE_ON_EXCEPTION(
isolate, result,
Execution::Call(isolate, target, receiver, argc, argv.start()));
return *result;
}
RUNTIME_FUNCTION(Runtime_Apply) {
HandleScope scope(isolate);
DCHECK(args.length() == 5);
CONVERT_ARG_HANDLE_CHECKED(JSReceiver, fun, 0);
CONVERT_ARG_HANDLE_CHECKED(Object, receiver, 1);
CONVERT_ARG_HANDLE_CHECKED(JSObject, arguments, 2);
CONVERT_INT32_ARG_CHECKED(offset, 3);
CONVERT_INT32_ARG_CHECKED(argc, 4);
RUNTIME_ASSERT(offset >= 0);
// Loose upper bound to allow fuzzing. We'll most likely run out of
// stack space before hitting this limit.
static int kMaxArgc = 1000000;
RUNTIME_ASSERT(argc >= 0 && argc <= kMaxArgc);
// If there are too many arguments, allocate argv via malloc.
const int argv_small_size = 10;
Handle<Object> argv_small_buffer[argv_small_size];
base::SmartArrayPointer<Handle<Object> > argv_large_buffer;
Handle<Object>* argv = argv_small_buffer;
if (argc > argv_small_size) {
argv = new Handle<Object>[argc];
if (argv == NULL) return isolate->StackOverflow();
argv_large_buffer = base::SmartArrayPointer<Handle<Object> >(argv);
}
for (int i = 0; i < argc; ++i) {
ASSIGN_RETURN_FAILURE_ON_EXCEPTION(
isolate, argv[i], Object::GetElement(isolate, arguments, offset + i));
}
Handle<Object> result;
ASSIGN_RETURN_FAILURE_ON_EXCEPTION(
isolate, result, Execution::Call(isolate, fun, receiver, argc, argv));
return *result;
}
RUNTIME_FUNCTION(Runtime_GetOriginalConstructor) {
SealHandleScope shs(isolate);
DCHECK(args.length() == 0);
JavaScriptFrameIterator it(isolate);
JavaScriptFrame* frame = it.frame();
// Currently we don't inline [[Construct]] calls.
return frame->IsConstructor() && !frame->HasInlinedFrames()
? frame->GetOriginalConstructor()
: isolate->heap()->undefined_value();
}
// ES6 section 9.2.1.2, OrdinaryCallBindThis for sloppy callee.
RUNTIME_FUNCTION(Runtime_ConvertReceiver) {
HandleScope scope(isolate);
DCHECK(args.length() == 1);
CONVERT_ARG_HANDLE_CHECKED(Object, receiver, 0);
if (receiver->IsNull() || receiver->IsUndefined()) {
return isolate->global_proxy();
}
return *Object::ToObject(isolate, receiver).ToHandleChecked();
}
RUNTIME_FUNCTION(Runtime_IsConstructCall) {
SealHandleScope shs(isolate);
DCHECK(args.length() == 0);
JavaScriptFrameIterator it(isolate);
JavaScriptFrame* frame = it.frame();
return isolate->heap()->ToBoolean(frame->IsConstructor());
}
RUNTIME_FUNCTION(Runtime_IsFunction) {
SealHandleScope shs(isolate);
DCHECK(args.length() == 1);
CONVERT_ARG_CHECKED(Object, obj, 0);
return isolate->heap()->ToBoolean(obj->IsJSFunction());
}
RUNTIME_FUNCTION(Runtime_ThrowStrongModeTooFewArguments) {
HandleScope scope(isolate);
DCHECK(args.length() == 0);
THROW_NEW_ERROR_RETURN_FAILURE(isolate,
NewTypeError(MessageTemplate::kStrongArity));
}
} // namespace internal
} // namespace v8
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