1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
|
/*
* Copyright (C) 2013-2020 Apple Inc. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. 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.
*
* THIS SOFTWARE IS PROVIDED BY APPLE INC. ``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 APPLE INC. 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.
*/
#ifndef APICallbackFunction_h
#define APICallbackFunction_h
#include "APICast.h"
#include "Error.h"
#include "JSCallbackConstructor.h"
#include "JSLock.h"
#include <wtf/Vector.h>
namespace JSC {
struct APICallbackFunction {
template <typename T> static EncodedJSValue callImpl(JSGlobalObject*, CallFrame*);
template <typename T> static EncodedJSValue constructImpl(JSGlobalObject*, CallFrame*);
};
template <typename T>
EncodedJSValue APICallbackFunction::callImpl(JSGlobalObject* globalObject, CallFrame* callFrame)
{
VM& vm = getVM(globalObject);
auto scope = DECLARE_THROW_SCOPE(vm);
JSContextRef execRef = toRef(globalObject);
JSObjectRef functionRef = toRef(callFrame->jsCallee());
JSObjectRef thisObjRef = toRef(jsCast<JSObject*>(callFrame->thisValue().toThis(globalObject, ECMAMode::sloppy())));
int argumentCount = static_cast<int>(callFrame->argumentCount());
Vector<JSValueRef, 16> arguments(argumentCount, [&](size_t i) {
return toRef(globalObject, callFrame->uncheckedArgument(i));
});
JSValueRef exception = nullptr;
JSValueRef result;
{
JSLock::DropAllLocks dropAllLocks(globalObject);
result = jsCast<T*>(toJS(functionRef))->functionCallback()(execRef, functionRef, thisObjRef, argumentCount, arguments.data(), &exception);
}
if (exception) {
throwException(globalObject, scope, toJS(globalObject, exception));
return JSValue::encode(jsUndefined());
}
// result must be a valid JSValue.
if (!result)
return JSValue::encode(jsUndefined());
return JSValue::encode(toJS(globalObject, result));
}
template <typename T>
EncodedJSValue APICallbackFunction::constructImpl(JSGlobalObject* globalObject, CallFrame* callFrame)
{
VM& vm = getVM(globalObject);
auto scope = DECLARE_THROW_SCOPE(vm);
JSValue callee = callFrame->jsCallee();
T* constructor = jsCast<T*>(callFrame->jsCallee());
JSContextRef ctx = toRef(globalObject);
JSObjectRef constructorRef = toRef(constructor);
JSObjectCallAsConstructorCallback callback = constructor->constructCallback();
if (callback) {
JSValue prototype;
JSValue newTarget = callFrame->newTarget();
// If we are doing a derived class construction get the .prototype property off the new target first so we behave closer to normal JS.
if (newTarget != constructor) {
prototype = newTarget.get(globalObject, vm.propertyNames->prototype);
RETURN_IF_EXCEPTION(scope, { });
}
size_t argumentCount = callFrame->argumentCount();
Vector<JSValueRef, 16> arguments(argumentCount, [&](size_t i) {
return toRef(globalObject, callFrame->uncheckedArgument(i));
});
JSValueRef exception = nullptr;
JSObjectRef result;
{
JSLock::DropAllLocks dropAllLocks(globalObject);
result = callback(ctx, constructorRef, argumentCount, arguments.data(), &exception);
}
if (exception) {
throwException(globalObject, scope, toJS(globalObject, exception));
return JSValue::encode(jsUndefined());
}
// result must be a valid JSValue.
if (!result)
return throwVMTypeError(globalObject, scope);
JSObject* newObject = toJS(result);
// This won't trigger proxy traps on newObject's prototype handler but that's probably desirable here anyway.
if (newTarget != constructor && newObject->getPrototypeDirect() == constructor->get(globalObject, vm.propertyNames->prototype)) {
RETURN_IF_EXCEPTION(scope, { });
newObject->setPrototype(vm, globalObject, prototype);
RETURN_IF_EXCEPTION(scope, { });
}
return JSValue::encode(newObject);
}
return JSValue::encode(toJS(JSObjectMake(ctx, jsCast<JSCallbackConstructor*>(callee)->classRef(), nullptr)));
}
} // namespace JSC
#endif // APICallbackFunction_h
|
