1/*
2 * Copyright (C) 2012-2018 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 "LLIntEntrypoint.h"
28#include "CodeBlock.h"
29#include "HeapInlines.h"
30#include "JITCode.h"
31#include "JSCellInlines.h"
32#include "JSObject.h"
33#include "LLIntData.h"
34#include "LLIntThunks.h"
35#include "LowLevelInterpreter.h"
36#include "MaxFrameExtentForSlowPathCall.h"
37#include "StackAlignment.h"
38#include "VM.h"
39
40namespace JSC { namespace LLInt {
41
42static void setFunctionEntrypoint(CodeBlock* codeBlock)
43{
44 CodeSpecializationKind kind = codeBlock->specializationKind();
45
46#if ENABLE(JIT)
47 if (VM::canUseJIT()) {
48 if (kind == CodeForCall) {
49 static DirectJITCode* jitCode;
50 static std::once_flag onceKey;
51 std::call_once(onceKey, [&] {
52 auto callRef = functionForCallEntryThunk().retagged<JSEntryPtrTag>();
53 auto callArityCheckRef = functionForCallArityCheckThunk().retaggedCode<JSEntryPtrTag>();
54 jitCode = new DirectJITCode(callRef, callArityCheckRef, JITType::InterpreterThunk, JITCode::ShareAttribute::Shared);
55 });
56
57 codeBlock->setJITCode(makeRef(*jitCode));
58 return;
59 }
60 ASSERT(kind == CodeForConstruct);
61
62 static DirectJITCode* jitCode;
63 static std::once_flag onceKey;
64 std::call_once(onceKey, [&] {
65 auto constructRef = functionForConstructEntryThunk().retagged<JSEntryPtrTag>();
66 auto constructArityCheckRef = functionForConstructArityCheckThunk().retaggedCode<JSEntryPtrTag>();
67 jitCode = new DirectJITCode(constructRef, constructArityCheckRef, JITType::InterpreterThunk, JITCode::ShareAttribute::Shared);
68 });
69
70 codeBlock->setJITCode(makeRef(*jitCode));
71 return;
72 }
73#endif // ENABLE(JIT)
74
75 if (kind == CodeForCall) {
76 static DirectJITCode* jitCode;
77 static std::once_flag onceKey;
78 std::call_once(onceKey, [&] {
79 jitCode = new DirectJITCode(getCodeRef<JSEntryPtrTag>(llint_function_for_call_prologue), getCodePtr<JSEntryPtrTag>(llint_function_for_call_arity_check), JITType::InterpreterThunk, JITCode::ShareAttribute::Shared);
80 });
81 codeBlock->setJITCode(makeRef(*jitCode));
82 } else {
83 static DirectJITCode* jitCode;
84 static std::once_flag onceKey;
85 std::call_once(onceKey, [&] {
86 jitCode = new DirectJITCode(getCodeRef<JSEntryPtrTag>(llint_function_for_construct_prologue), getCodePtr<JSEntryPtrTag>(llint_function_for_construct_arity_check), JITType::InterpreterThunk, JITCode::ShareAttribute::Shared);
87 });
88 codeBlock->setJITCode(makeRef(*jitCode));
89 }
90}
91
92static void setEvalEntrypoint(CodeBlock* codeBlock)
93{
94#if ENABLE(JIT)
95 if (VM::canUseJIT()) {
96 static NativeJITCode* jitCode;
97 static std::once_flag onceKey;
98 std::call_once(onceKey, [&] {
99 MacroAssemblerCodeRef<JSEntryPtrTag> codeRef = evalEntryThunk().retagged<JSEntryPtrTag>();
100 jitCode = new NativeJITCode(codeRef, JITType::InterpreterThunk, Intrinsic::NoIntrinsic, JITCode::ShareAttribute::Shared);
101 });
102 codeBlock->setJITCode(makeRef(*jitCode));
103 return;
104 }
105#endif // ENABLE(JIT)
106
107 static NativeJITCode* jitCode;
108 static std::once_flag onceKey;
109 std::call_once(onceKey, [&] {
110 jitCode = new NativeJITCode(getCodeRef<JSEntryPtrTag>(llint_eval_prologue), JITType::InterpreterThunk, Intrinsic::NoIntrinsic, JITCode::ShareAttribute::Shared);
111 });
112 codeBlock->setJITCode(makeRef(*jitCode));
113}
114
115static void setProgramEntrypoint(CodeBlock* codeBlock)
116{
117#if ENABLE(JIT)
118 if (VM::canUseJIT()) {
119 static NativeJITCode* jitCode;
120 static std::once_flag onceKey;
121 std::call_once(onceKey, [&] {
122 MacroAssemblerCodeRef<JSEntryPtrTag> codeRef = programEntryThunk().retagged<JSEntryPtrTag>();
123 jitCode = new NativeJITCode(codeRef, JITType::InterpreterThunk, Intrinsic::NoIntrinsic, JITCode::ShareAttribute::Shared);
124 });
125 codeBlock->setJITCode(makeRef(*jitCode));
126 return;
127 }
128#endif // ENABLE(JIT)
129
130 static NativeJITCode* jitCode;
131 static std::once_flag onceKey;
132 std::call_once(onceKey, [&] {
133 jitCode = new NativeJITCode(getCodeRef<JSEntryPtrTag>(llint_program_prologue), JITType::InterpreterThunk, Intrinsic::NoIntrinsic, JITCode::ShareAttribute::Shared);
134 });
135 codeBlock->setJITCode(makeRef(*jitCode));
136}
137
138static void setModuleProgramEntrypoint(CodeBlock* codeBlock)
139{
140#if ENABLE(JIT)
141 if (VM::canUseJIT()) {
142 static NativeJITCode* jitCode;
143 static std::once_flag onceKey;
144 std::call_once(onceKey, [&] {
145 MacroAssemblerCodeRef<JSEntryPtrTag> codeRef = moduleProgramEntryThunk().retagged<JSEntryPtrTag>();
146 jitCode = new NativeJITCode(codeRef, JITType::InterpreterThunk, Intrinsic::NoIntrinsic, JITCode::ShareAttribute::Shared);
147 });
148 codeBlock->setJITCode(makeRef(*jitCode));
149 return;
150 }
151#endif // ENABLE(JIT)
152
153 static NativeJITCode* jitCode;
154 static std::once_flag onceKey;
155 std::call_once(onceKey, [&] {
156 jitCode = new NativeJITCode(getCodeRef<JSEntryPtrTag>(llint_module_program_prologue), JITType::InterpreterThunk, Intrinsic::NoIntrinsic, JITCode::ShareAttribute::Shared);
157 });
158 codeBlock->setJITCode(makeRef(*jitCode));
159}
160
161void setEntrypoint(CodeBlock* codeBlock)
162{
163 switch (codeBlock->codeType()) {
164 case GlobalCode:
165 setProgramEntrypoint(codeBlock);
166 return;
167 case ModuleCode:
168 setModuleProgramEntrypoint(codeBlock);
169 return;
170 case EvalCode:
171 setEvalEntrypoint(codeBlock);
172 return;
173 case FunctionCode:
174 setFunctionEntrypoint(codeBlock);
175 return;
176 }
177
178 RELEASE_ASSERT_NOT_REACHED();
179}
180
181unsigned frameRegisterCountFor(CodeBlock* codeBlock)
182{
183 ASSERT(static_cast<unsigned>(codeBlock->numCalleeLocals()) == WTF::roundUpToMultipleOf(stackAlignmentRegisters(), static_cast<unsigned>(codeBlock->numCalleeLocals())));
184
185 return roundLocalRegisterCountForFramePointerOffset(codeBlock->numCalleeLocals() + maxFrameExtentForSlowPathCallInRegisters);
186}
187
188} } // namespace JSC::LLInt
189