1/*
2 * Copyright (C) 2017 Yusuke Suzuki <utatane.tea@gmail.com>.
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 "ModuleNamespaceAccessCase.h"
28
29#if ENABLE(JIT)
30
31#include "CCallHelpers.h"
32#include "HeapInlines.h"
33#include "JSModuleEnvironment.h"
34#include "JSModuleNamespaceObject.h"
35#include "PolymorphicAccess.h"
36#include "StructureStubInfo.h"
37
38namespace JSC {
39
40ModuleNamespaceAccessCase::ModuleNamespaceAccessCase(VM& vm, JSCell* owner, JSModuleNamespaceObject* moduleNamespaceObject, JSModuleEnvironment* moduleEnvironment, ScopeOffset scopeOffset)
41 : Base(vm, owner, ModuleNamespaceLoad, invalidOffset, nullptr, ObjectPropertyConditionSet(), nullptr)
42 , m_scopeOffset(scopeOffset)
43{
44 m_moduleNamespaceObject.set(vm, owner, moduleNamespaceObject);
45 m_moduleEnvironment.set(vm, owner, moduleEnvironment);
46}
47
48std::unique_ptr<AccessCase> ModuleNamespaceAccessCase::create(VM& vm, JSCell* owner, JSModuleNamespaceObject* moduleNamespaceObject, JSModuleEnvironment* moduleEnvironment, ScopeOffset scopeOffset)
49{
50 return std::unique_ptr<AccessCase>(new ModuleNamespaceAccessCase(vm, owner, moduleNamespaceObject, moduleEnvironment, scopeOffset));
51}
52
53ModuleNamespaceAccessCase::~ModuleNamespaceAccessCase()
54{
55}
56
57std::unique_ptr<AccessCase> ModuleNamespaceAccessCase::clone() const
58{
59 std::unique_ptr<ModuleNamespaceAccessCase> result(new ModuleNamespaceAccessCase(*this));
60 result->resetState();
61 return result;
62}
63
64void ModuleNamespaceAccessCase::emit(AccessGenerationState& state, MacroAssembler::JumpList& fallThrough)
65{
66 CCallHelpers& jit = *state.jit;
67 JSValueRegs valueRegs = state.valueRegs;
68 GPRReg baseGPR = state.baseGPR;
69
70 fallThrough.append(
71 jit.branchPtr(
72 CCallHelpers::NotEqual,
73 baseGPR,
74 CCallHelpers::TrustedImmPtr(m_moduleNamespaceObject.get())));
75
76 jit.loadValue(&m_moduleEnvironment->variableAt(m_scopeOffset), valueRegs);
77 state.failAndIgnore.append(jit.branchIfEmpty(valueRegs));
78 state.succeed();
79}
80
81
82} // namespace JSC
83
84#endif // ENABLE(JIT)
85