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 "JSDocument.h" |
28 | |
29 | #if ENABLE(JIT) |
30 | |
31 | #include "DOMJITAbstractHeapRepository.h" |
32 | #include "DOMJITCheckDOM.h" |
33 | #include "DOMJITHelpers.h" |
34 | #include "Document.h" |
35 | #include "JSDOMWrapper.h" |
36 | #include "JSElement.h" |
37 | #include "JSHTMLElement.h" |
38 | #include <JavaScriptCore/Snippet.h> |
39 | #include <JavaScriptCore/SnippetParams.h> |
40 | |
41 | namespace WebCore { |
42 | using namespace JSC; |
43 | |
44 | Ref<JSC::Snippet> checkSubClassSnippetForJSDocument() |
45 | { |
46 | return DOMJIT::checkDOM<Document>(); |
47 | } |
48 | |
49 | Ref<JSC::DOMJIT::CallDOMGetterSnippet> compileDocumentDocumentElementAttribute() |
50 | { |
51 | Ref<JSC::DOMJIT::CallDOMGetterSnippet> snippet = JSC::DOMJIT::CallDOMGetterSnippet::create(); |
52 | snippet->numGPScratchRegisters = 1; |
53 | snippet->setGenerator([=](CCallHelpers& jit, JSC::SnippetParams& params) { |
54 | JSValueRegs result = params[0].jsValueRegs(); |
55 | GPRReg document = params[1].gpr(); |
56 | GPRReg globalObject = params[2].gpr(); |
57 | JSValue globalObjectValue = params[2].value(); |
58 | GPRReg scratch = params.gpScratch(0); |
59 | |
60 | jit.loadPtr(CCallHelpers::Address(document, JSDocument::offsetOfWrapped()), scratch); |
61 | DOMJIT::loadDocumentElement(jit, scratch, scratch); |
62 | auto nullCase = jit.branchTestPtr(CCallHelpers::Zero, scratch); |
63 | DOMJIT::toWrapper<Element>(jit, params, scratch, globalObject, result, DOMJIT::toWrapperSlow<Element>, globalObjectValue); |
64 | auto done = jit.jump(); |
65 | |
66 | nullCase.link(&jit); |
67 | jit.moveValue(jsNull(), result); |
68 | done.link(&jit); |
69 | |
70 | return CCallHelpers::JumpList(); |
71 | }); |
72 | snippet->effect = JSC::DOMJIT::Effect::forDef(DOMJIT::AbstractHeapRepository::Document_documentElement); |
73 | return snippet; |
74 | } |
75 | |
76 | static void loadLocalName(CCallHelpers& jit, GPRReg htmlElement, GPRReg localNameImpl) |
77 | { |
78 | jit.loadPtr(CCallHelpers::Address(htmlElement, Element::tagQNameMemoryOffset() + QualifiedName::implMemoryOffset()), localNameImpl); |
79 | jit.loadPtr(CCallHelpers::Address(localNameImpl, QualifiedName::QualifiedNameImpl::localNameMemoryOffset()), localNameImpl); |
80 | } |
81 | |
82 | Ref<JSC::DOMJIT::CallDOMGetterSnippet> compileDocumentBodyAttribute() |
83 | { |
84 | Ref<JSC::DOMJIT::CallDOMGetterSnippet> snippet = JSC::DOMJIT::CallDOMGetterSnippet::create(); |
85 | snippet->numGPScratchRegisters = 2; |
86 | snippet->setGenerator([=](CCallHelpers& jit, JSC::SnippetParams& params) { |
87 | JSValueRegs result = params[0].jsValueRegs(); |
88 | GPRReg document = params[1].gpr(); |
89 | GPRReg globalObject = params[2].gpr(); |
90 | JSValue globalObjectValue = params[2].value(); |
91 | GPRReg scratch1 = params.gpScratch(0); |
92 | GPRReg scratch2 = params.gpScratch(1); |
93 | |
94 | jit.loadPtr(CCallHelpers::Address(document, JSDocument::offsetOfWrapped()), scratch1); |
95 | DOMJIT::loadDocumentElement(jit, scratch1, scratch1); |
96 | |
97 | CCallHelpers::JumpList nullCases; |
98 | CCallHelpers::JumpList successCases; |
99 | nullCases.append(jit.branchTestPtr(CCallHelpers::Zero, scratch1)); |
100 | nullCases.append(DOMJIT::branchTestIsHTMLFlagOnNode(jit, CCallHelpers::Zero, scratch1)); |
101 | // We ensured that the name of the given element is HTML qualified. |
102 | // It allows us to perform local name comparison! |
103 | loadLocalName(jit, scratch1, scratch2); |
104 | nullCases.append(jit.branchPtr(CCallHelpers::NotEqual, scratch2, CCallHelpers::TrustedImmPtr(HTMLNames::htmlTag->localName().impl()))); |
105 | |
106 | RELEASE_ASSERT(!CAST_OFFSET(Node*, ContainerNode*)); |
107 | RELEASE_ASSERT(!CAST_OFFSET(Node*, Element*)); |
108 | RELEASE_ASSERT(!CAST_OFFSET(Node*, HTMLElement*)); |
109 | |
110 | // Node* node = current.firstChild(); |
111 | // while (node && !is<HTMLElement>(*node)) |
112 | // node = node->nextSibling(); |
113 | // return downcast<HTMLElement>(node); |
114 | jit.loadPtr(CCallHelpers::Address(scratch1, ContainerNode::firstChildMemoryOffset()), scratch1); |
115 | |
116 | CCallHelpers::Label loopStart = jit.label(); |
117 | nullCases.append(jit.branchTestPtr(CCallHelpers::Zero, scratch1)); |
118 | auto notHTMLElementCase = DOMJIT::branchTestIsHTMLFlagOnNode(jit, CCallHelpers::Zero, scratch1); |
119 | // We ensured that the name of the given element is HTML qualified. |
120 | // It allows us to perform local name comparison! |
121 | loadLocalName(jit, scratch1, scratch2); |
122 | successCases.append(jit.branchPtr(CCallHelpers::Equal, scratch2, CCallHelpers::TrustedImmPtr(HTMLNames::bodyTag->localName().impl()))); |
123 | successCases.append(jit.branchPtr(CCallHelpers::Equal, scratch2, CCallHelpers::TrustedImmPtr(HTMLNames::framesetTag->localName().impl()))); |
124 | |
125 | notHTMLElementCase.link(&jit); |
126 | jit.loadPtr(CCallHelpers::Address(scratch1, Node::nextSiblingMemoryOffset()), scratch1); |
127 | jit.jump().linkTo(loopStart, &jit); |
128 | |
129 | successCases.link(&jit); |
130 | DOMJIT::toWrapper<HTMLElement>(jit, params, scratch1, globalObject, result, DOMJIT::toWrapperSlow<HTMLElement>, globalObjectValue); |
131 | auto done = jit.jump(); |
132 | |
133 | nullCases.link(&jit); |
134 | jit.moveValue(jsNull(), result); |
135 | done.link(&jit); |
136 | |
137 | return CCallHelpers::JumpList(); |
138 | }); |
139 | snippet->effect = JSC::DOMJIT::Effect::forDef(DOMJIT::AbstractHeapRepository::Document_body); |
140 | return snippet; |
141 | } |
142 | |
143 | } |
144 | |
145 | #endif |
146 | |