[WTF] Add makeUnique<T>, which ensures T is fast-allocated, makeUnique / makeUniqueWi...
[WebKit-https.git] / Source / JavaScriptCore / bytecode / AccessCaseSnippetParams.cpp
1 /*
2  * Copyright (C) 2016-2018 Apple Inc. All rights reserved.
3  *
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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,
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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 "AccessCaseSnippetParams.h"
28
29 #include "LinkBuffer.h"
30 #include "PolymorphicAccess.h"
31 #include "StructureStubInfo.h"
32
33 #if ENABLE(JIT)
34
35 namespace JSC {
36
37 template<typename JumpType, typename FunctionType, typename ResultType, typename... Arguments>
38 class SlowPathCallGeneratorWithArguments : public AccessCaseSnippetParams::SlowPathCallGenerator {
39 public:
40     SlowPathCallGeneratorWithArguments(JumpType from, CCallHelpers::Label to, FunctionType function, ResultType result, std::tuple<Arguments...> arguments)
41         : m_from(from)
42         , m_to(to)
43         , m_function(function)
44         , m_result(result)
45         , m_arguments(arguments)
46     {
47     }
48
49     template<size_t... ArgumentsIndex>
50     CCallHelpers::JumpList generateImpl(AccessGenerationState& state, const RegisterSet& usedRegistersBySnippet, CCallHelpers& jit, std::index_sequence<ArgumentsIndex...>)
51     {
52         CCallHelpers::JumpList exceptions;
53         // We spill (1) the used registers by IC and (2) the used registers by Snippet.
54         AccessGenerationState::SpillState spillState = state.preserveLiveRegistersToStackForCall(usedRegistersBySnippet);
55
56         jit.store32(
57             CCallHelpers::TrustedImm32(state.callSiteIndexForExceptionHandlingOrOriginal().bits()),
58             CCallHelpers::tagFor(static_cast<VirtualRegister>(CallFrameSlot::argumentCount)));
59
60         jit.makeSpaceOnStackForCCall();
61
62         jit.setupArguments<FunctionType>(std::get<ArgumentsIndex>(m_arguments)...);
63
64         CCallHelpers::Call operationCall = jit.call(OperationPtrTag);
65         auto function = m_function;
66         jit.addLinkTask([=] (LinkBuffer& linkBuffer) {
67             linkBuffer.link(operationCall, FunctionPtr<OperationPtrTag>(function));
68         });
69
70         jit.setupResults(m_result);
71         jit.reclaimSpaceOnStackForCCall();
72
73         CCallHelpers::Jump noException = jit.emitExceptionCheck(state.m_vm, CCallHelpers::InvertedExceptionCheck);
74
75         state.restoreLiveRegistersFromStackForCallWithThrownException(spillState);
76         exceptions.append(jit.jump());
77
78         noException.link(&jit);
79         RegisterSet dontRestore;
80         dontRestore.set(m_result);
81         state.restoreLiveRegistersFromStackForCall(spillState, dontRestore);
82
83         return exceptions;
84     }
85
86     CCallHelpers::JumpList generate(AccessGenerationState& state, const RegisterSet& usedRegistersBySnippet, CCallHelpers& jit) override
87     {
88         m_from.link(&jit);
89         CCallHelpers::JumpList exceptions = generateImpl(state, usedRegistersBySnippet, jit, std::make_index_sequence<std::tuple_size<std::tuple<Arguments...>>::value>());
90         jit.jump().linkTo(m_to, &jit);
91         return exceptions;
92     }
93
94 protected:
95     JumpType m_from;
96     CCallHelpers::Label m_to;
97     FunctionType m_function;
98     ResultType m_result;
99     std::tuple<Arguments...> m_arguments;
100 };
101
102 #define JSC_DEFINE_CALL_OPERATIONS(OperationType, ResultType, ...) \
103     void AccessCaseSnippetParams::addSlowPathCallImpl(CCallHelpers::JumpList from, CCallHelpers& jit, OperationType operation, ResultType result, std::tuple<__VA_ARGS__> args) \
104     { \
105         CCallHelpers::Label to = jit.label(); \
106         m_generators.append(makeUnique<SlowPathCallGeneratorWithArguments<CCallHelpers::JumpList, OperationType, ResultType, __VA_ARGS__>>(from, to, operation, result, args)); \
107     } \
108
109 SNIPPET_SLOW_PATH_CALLS(JSC_DEFINE_CALL_OPERATIONS)
110 #undef JSC_DEFINE_CALL_OPERATIONS
111
112 CCallHelpers::JumpList AccessCaseSnippetParams::emitSlowPathCalls(AccessGenerationState& state, const RegisterSet& usedRegistersBySnippet, CCallHelpers& jit)
113 {
114     CCallHelpers::JumpList exceptions;
115     for (auto& generator : m_generators)
116         exceptions.append(generator->generate(state, usedRegistersBySnippet, jit));
117     return exceptions;
118 }
119
120 }
121
122 #endif