1/*
2 * Copyright (C) 2016 Apple Inc. All Rights Reserved.
3 *
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions
6 * are met:
7 * 1. Redistributions of source code must retain the above copyright
8 * notice, this list of conditions and the following disclaimer.
9 * 2. Redistributions in binary form must reproduce the above copyright
10 * notice, this list of conditions and the following disclaimer in the
11 * documentation and/or other materials provided with the distribution.
12 *
13 * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
14 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
15 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
16 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR
17 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
18 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
19 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
20 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
21 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
22 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
23 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
24 */
25
26#include "config.h"
27#include "ProxyConstructor.h"
28
29#include "Error.h"
30#include "IdentifierInlines.h"
31#include "JSCInlines.h"
32#include "ObjectConstructor.h"
33#include "ObjectPrototype.h"
34#include "ProxyObject.h"
35#include "ProxyRevoke.h"
36#include "StructureInlines.h"
37
38namespace JSC {
39
40STATIC_ASSERT_IS_TRIVIALLY_DESTRUCTIBLE(ProxyConstructor);
41
42const ClassInfo ProxyConstructor::s_info = { "Proxy", &Base::s_info, nullptr, nullptr, CREATE_METHOD_TABLE(ProxyConstructor) };
43
44ProxyConstructor* ProxyConstructor::create(VM& vm, Structure* structure)
45{
46 ProxyConstructor* constructor = new (NotNull, allocateCell<ProxyConstructor>(vm.heap)) ProxyConstructor(vm, structure);
47 constructor->finishCreation(vm, "Proxy", structure->globalObject());
48 return constructor;
49}
50
51static EncodedJSValue JSC_HOST_CALL callProxy(ExecState*);
52static EncodedJSValue JSC_HOST_CALL constructProxyObject(ExecState*);
53
54ProxyConstructor::ProxyConstructor(VM& vm, Structure* structure)
55 : Base(vm, structure, callProxy, constructProxyObject)
56{
57}
58
59static EncodedJSValue JSC_HOST_CALL makeRevocableProxy(ExecState* exec)
60{
61 VM& vm = exec->vm();
62 auto scope = DECLARE_THROW_SCOPE(vm);
63 if (exec->argumentCount() < 2)
64 return throwVMTypeError(exec, scope, "Proxy.revocable needs to be called with two arguments: the target and the handler"_s);
65
66 ArgList args(exec);
67 JSValue target = args.at(0);
68 JSValue handler = args.at(1);
69 ProxyObject* proxy = ProxyObject::create(exec, exec->lexicalGlobalObject(), target, handler);
70 RETURN_IF_EXCEPTION(scope, encodedJSValue());
71 ProxyRevoke* revoke = ProxyRevoke::create(vm, exec->lexicalGlobalObject()->proxyRevokeStructure(), proxy);
72 RETURN_IF_EXCEPTION(scope, encodedJSValue());
73
74 JSObject* result = constructEmptyObject(exec);
75 RETURN_IF_EXCEPTION(scope, encodedJSValue());
76 result->putDirect(vm, makeIdentifier(vm, "proxy"), proxy, static_cast<unsigned>(PropertyAttribute::None));
77 result->putDirect(vm, makeIdentifier(vm, "revoke"), revoke, static_cast<unsigned>(PropertyAttribute::None));
78
79 return JSValue::encode(result);
80}
81
82static EncodedJSValue JSC_HOST_CALL proxyRevocableConstructorThrowError(ExecState* exec)
83{
84 auto scope = DECLARE_THROW_SCOPE(exec->vm());
85 return throwVMTypeError(exec, scope, "Proxy.revocable cannot be constructed. It can only be called"_s);
86}
87
88void ProxyConstructor::finishCreation(VM& vm, const char* name, JSGlobalObject* globalObject)
89{
90 Base::finishCreation(vm, name, NameVisibility::Visible, NameAdditionMode::WithStructureTransition);
91 putDirect(vm, vm.propertyNames->length, jsNumber(2), PropertyAttribute::DontEnum | PropertyAttribute::ReadOnly);
92 putDirect(vm, makeIdentifier(vm, "revocable"), JSFunction::create(vm, globalObject, 2, "revocable"_s, makeRevocableProxy, NoIntrinsic, proxyRevocableConstructorThrowError));
93}
94
95static EncodedJSValue JSC_HOST_CALL constructProxyObject(ExecState* exec)
96{
97 auto scope = DECLARE_THROW_SCOPE(exec->vm());
98 if (exec->newTarget().isUndefined())
99 return throwVMTypeError(exec, scope, "new.target of Proxy construct should not be undefined"_s);
100
101 ArgList args(exec);
102 JSValue target = args.at(0);
103 JSValue handler = args.at(1);
104 RELEASE_AND_RETURN(scope, JSValue::encode(ProxyObject::create(exec, exec->lexicalGlobalObject(), target, handler)));
105}
106
107static EncodedJSValue JSC_HOST_CALL callProxy(ExecState* exec)
108{
109 auto scope = DECLARE_THROW_SCOPE(exec->vm());
110 return JSValue::encode(throwConstructorCannotBeCalledAsFunctionTypeError(exec, scope, "Proxy"));
111}
112
113} // namespace JSC
114