runtime-function.cc

// 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/accessors.h"
#include "src/arguments-inl.h"
#include "src/compiler.h"
#include "src/counters.h"
#include "src/isolate-inl.h"
#include "src/runtime/runtime-utils.h"

namespace v8 {
namespace internal {

// TODO(5530): Remove once uses in debug.js are gone.
RUNTIME_FUNCTION(Runtime_FunctionGetScriptSource) {
  HandleScope scope(isolate);
  DCHECK_EQ(1, args.length());
  CONVERT_ARG_HANDLE_CHECKED(JSReceiver, function, 0);

  if (function->IsJSFunction()) {
    Handle<Object> script(
        Handle<JSFunction>::cast(function)->shared()->script(), isolate);
    if (script->IsScript()) return Handle<Script>::cast(script)->source();
  }
  return ReadOnlyRoots(isolate).undefined_value();
}

RUNTIME_FUNCTION(Runtime_FunctionGetScriptId) {
  HandleScope scope(isolate);
  DCHECK_EQ(1, args.length());
  CONVERT_ARG_HANDLE_CHECKED(JSReceiver, function, 0);

  if (function->IsJSFunction()) {
    Handle<Object> script(
        Handle<JSFunction>::cast(function)->shared()->script(), isolate);
    if (script->IsScript()) {
      return Smi::FromInt(Handle<Script>::cast(script)->id());
    }
  }
  return Smi::FromInt(-1);
}

RUNTIME_FUNCTION(Runtime_FunctionGetSourceCode) {
  HandleScope scope(isolate);
  DCHECK_EQ(1, args.length());
  CONVERT_ARG_HANDLE_CHECKED(JSReceiver, function, 0);
  if (function->IsJSFunction()) {
    Handle<SharedFunctionInfo> shared(
        Handle<JSFunction>::cast(function)->shared(), isolate);
    return *SharedFunctionInfo::GetSourceCode(shared);
  }
  return ReadOnlyRoots(isolate).undefined_value();
}


RUNTIME_FUNCTION(Runtime_FunctionGetScriptSourcePosition) {
  SealHandleScope shs(isolate);
  DCHECK_EQ(1, args.length());

  CONVERT_ARG_CHECKED(JSFunction, fun, 0);
  int pos = fun->shared()->StartPosition();
  return Smi::FromInt(pos);
}


RUNTIME_FUNCTION(Runtime_FunctionIsAPIFunction) {
  SealHandleScope shs(isolate);
  DCHECK_EQ(1, args.length());

  CONVERT_ARG_CHECKED(JSFunction, f, 0);
  return isolate->heap()->ToBoolean(f->shared()->IsApiFunction());
}


// 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);
  DCHECK_EQ(1, args.length());

  CONVERT_ARG_CHECKED(Object, object, 0);

  if (object->IsJSFunction()) {
    JSFunction* func = JSFunction::cast(object);
    func->shared()->set_native(true);
  }
  return ReadOnlyRoots(isolate).undefined_value();
}


RUNTIME_FUNCTION(Runtime_Call) {
  HandleScope scope(isolate);
  DCHECK_LE(2, args.length());
  int const argc = args.length() - 2;
  CONVERT_ARG_HANDLE_CHECKED(Object, 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(2 + i);
  }
  RETURN_RESULT_OR_FAILURE(
      isolate, Execution::Call(isolate, target, receiver, argc, argv.start()));
}


RUNTIME_FUNCTION(Runtime_IsFunction) {
  SealHandleScope shs(isolate);
  DCHECK_EQ(1, args.length());
  CONVERT_ARG_CHECKED(Object, object, 0);
  return isolate->heap()->ToBoolean(object->IsFunction());
}


}  // namespace internal
}  // namespace v8