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
131
132
133
134
135
136
137
138
|
/*
* Copyright (C) 2015-2021 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.
* 3. Neither the name of Apple Inc. ("Apple") nor the names of
* its contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "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 OR ITS 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.
*/
#include "config.h"
#include "JSModuleEnvironment.h"
#include "AbstractModuleRecord.h"
#include "JSCInlines.h"
namespace JSC {
const ClassInfo JSModuleEnvironment::s_info = { "JSModuleEnvironment"_s, &Base::s_info, nullptr, nullptr, CREATE_METHOD_TABLE(JSModuleEnvironment) };
JSModuleEnvironment* JSModuleEnvironment::create(
VM& vm, Structure* structure, JSScope* currentScope, SymbolTable* symbolTable, JSValue initialValue, AbstractModuleRecord* moduleRecord)
{
// JSLexicalEnvironment has the storage to store the variable slots after the its class storage.
// Because the offset of the variable slots are fixed in the JSLexicalEnvironment, inheritting these class and adding new member field is not allowed,
// the new member will overlap the variable slots.
// To keep the JSModuleEnvironment compatible to the JSLexicalEnvironment but add the new member to store the AbstractModuleRecord, we additionally allocate
// the storage after the variable slots.
//
// JSLexicalEnvironment:
// [ JSLexicalEnvironment ][ variable slots ]
//
// JSModuleEnvironment:
// [ JSLexicalEnvironment ][ variable slots ][ additional slots for JSModuleEnvironment ]
JSModuleEnvironment* result =
new (
NotNull,
allocateCell<JSModuleEnvironment>(vm, JSModuleEnvironment::allocationSize(symbolTable)))
JSModuleEnvironment(vm, structure, currentScope, symbolTable, initialValue, moduleRecord);
result->finishCreation(vm);
return result;
}
template<typename Visitor>
void JSModuleEnvironment::visitChildrenImpl(JSCell* cell, Visitor& visitor)
{
JSModuleEnvironment* thisObject = jsCast<JSModuleEnvironment*>(cell);
ASSERT_GC_OBJECT_INHERITS(thisObject, info());
Base::visitChildren(thisObject, visitor);
visitor.appendValues(thisObject->variables(), thisObject->symbolTable()->scopeSize());
visitor.append(thisObject->moduleRecordSlot());
}
DEFINE_VISIT_CHILDREN(JSModuleEnvironment);
bool JSModuleEnvironment::getOwnPropertySlot(JSObject* cell, JSGlobalObject* globalObject, PropertyName propertyName, PropertySlot& slot)
{
VM& vm = globalObject->vm();
auto scope = DECLARE_THROW_SCOPE(vm);
JSModuleEnvironment* thisObject = jsCast<JSModuleEnvironment*>(cell);
AbstractModuleRecord::Resolution resolution = thisObject->moduleRecord()->resolveImport(globalObject, Identifier::fromUid(vm, propertyName.uid()));
RETURN_IF_EXCEPTION(scope, false);
if (resolution.type == AbstractModuleRecord::Resolution::Type::Resolved) {
// When resolveImport resolves the resolution, the imported module environment must have the binding.
JSModuleEnvironment* importedModuleEnvironment = resolution.moduleRecord->moduleEnvironment();
PropertySlot redirectSlot(importedModuleEnvironment, PropertySlot::InternalMethodType::Get);
bool result = importedModuleEnvironment->methodTable()->getOwnPropertySlot(importedModuleEnvironment, globalObject, resolution.localName, redirectSlot);
ASSERT_UNUSED(result, result);
ASSERT(redirectSlot.isValue());
JSValue value = redirectSlot.getValue(globalObject, resolution.localName);
scope.assertNoException();
slot.setValue(thisObject, redirectSlot.attributes(), value);
return true;
}
return Base::getOwnPropertySlot(thisObject, globalObject, propertyName, slot);
}
void JSModuleEnvironment::getOwnSpecialPropertyNames(JSObject* cell, JSGlobalObject*, PropertyNameArray& propertyNamesArray, DontEnumPropertiesMode)
{
JSModuleEnvironment* thisObject = jsCast<JSModuleEnvironment*>(cell);
if (propertyNamesArray.includeStringProperties()) {
for (const auto& pair : thisObject->moduleRecord()->importEntries()) {
const AbstractModuleRecord::ImportEntry& importEntry = pair.value;
if (importEntry.type == AbstractModuleRecord::ImportEntryType::Single)
propertyNamesArray.add(importEntry.localName);
}
}
}
bool JSModuleEnvironment::put(JSCell* cell, JSGlobalObject* globalObject, PropertyName propertyName, JSValue value, PutPropertySlot& slot)
{
VM& vm = globalObject->vm();
auto scope = DECLARE_THROW_SCOPE(vm);
JSModuleEnvironment* thisObject = jsCast<JSModuleEnvironment*>(cell);
// All imported bindings are immutable.
AbstractModuleRecord::Resolution resolution = thisObject->moduleRecord()->resolveImport(globalObject, Identifier::fromUid(vm, propertyName.uid()));
RETURN_IF_EXCEPTION(scope, false);
if (resolution.type == AbstractModuleRecord::Resolution::Type::Resolved) {
throwTypeError(globalObject, scope, ReadonlyPropertyWriteError);
return false;
}
RELEASE_AND_RETURN(scope, Base::put(thisObject, globalObject, propertyName, value, slot));
}
bool JSModuleEnvironment::deleteProperty(JSCell* cell, JSGlobalObject* globalObject, PropertyName propertyName, DeletePropertySlot& slot)
{
VM& vm = globalObject->vm();
auto scope = DECLARE_THROW_SCOPE(vm);
JSModuleEnvironment* thisObject = jsCast<JSModuleEnvironment*>(cell);
// All imported bindings are immutable.
AbstractModuleRecord::Resolution resolution = thisObject->moduleRecord()->resolveImport(globalObject, Identifier::fromUid(vm, propertyName.uid()));
RETURN_IF_EXCEPTION(scope, false);
if (resolution.type == AbstractModuleRecord::Resolution::Type::Resolved)
return false;
return Base::deleteProperty(thisObject, globalObject, propertyName, slot);
}
} // namespace JSC
|
