1 | /* |
2 | * Copyright (C) 2008 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 | * |
8 | * 1. Redistributions of source code must retain the above copyright |
9 | * notice, this list of conditions and the following disclaimer. |
10 | * 2. Redistributions in binary form must reproduce the above copyright |
11 | * notice, this list of conditions and the following disclaimer in the |
12 | * documentation and/or other materials provided with the distribution. |
13 | * 3. Neither the name of Apple Computer, Inc. ("Apple") nor the names of |
14 | * its contributors may be used to endorse or promote products derived |
15 | * from this software without specific prior written permission. |
16 | * |
17 | * THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "AS IS" AND ANY |
18 | * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED |
19 | * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE |
20 | * DISCLAIMED. IN NO EVENT SHALL APPLE OR ITS CONTRIBUTORS BE LIABLE FOR ANY |
21 | * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES |
22 | * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; |
23 | * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND |
24 | * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
25 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
26 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
27 | */ |
28 | |
29 | #ifndef Interpreter_h |
30 | #define Interpreter_h |
31 | |
32 | #include "ArgList.h" |
33 | #include "FastAllocBase.h" |
34 | #include "JSCell.h" |
35 | #include "JSValue.h" |
36 | #include "JSObject.h" |
37 | #include "Opcode.h" |
38 | #include "RegisterFile.h" |
39 | |
40 | #include <wtf/HashMap.h> |
41 | |
42 | namespace JSC { |
43 | |
44 | class CodeBlock; |
45 | class EvalExecutable; |
46 | class FunctionExecutable; |
47 | class InternalFunction; |
48 | class JSFunction; |
49 | class JSGlobalObject; |
50 | class ProgramExecutable; |
51 | class Register; |
52 | class ScopeChainNode; |
53 | class SamplingTool; |
54 | struct CallFrameClosure; |
55 | struct HandlerInfo; |
56 | struct Instruction; |
57 | |
58 | enum DebugHookID { |
59 | WillExecuteProgram, |
60 | DidExecuteProgram, |
61 | DidEnterCallFrame, |
62 | DidReachBreakpoint, |
63 | WillLeaveCallFrame, |
64 | WillExecuteStatement |
65 | }; |
66 | |
67 | enum { MaxMainThreadReentryDepth = 256, MaxSecondaryThreadReentryDepth = 32 }; |
68 | |
69 | class Interpreter : public FastAllocBase { |
70 | friend class JIT; |
71 | friend class CachedCall; |
72 | public: |
73 | Interpreter(); |
74 | |
75 | RegisterFile& registerFile() { return m_registerFile; } |
76 | |
77 | Opcode getOpcode(OpcodeID id) |
78 | { |
79 | #if HAVE(COMPUTED_GOTO) |
80 | return m_opcodeTable[id]; |
81 | #else |
82 | return id; |
83 | #endif |
84 | } |
85 | |
86 | OpcodeID getOpcodeID(Opcode opcode) |
87 | { |
88 | #if HAVE(COMPUTED_GOTO) |
89 | ASSERT(isOpcode(opcode)); |
90 | return m_opcodeIDTable.get(opcode); |
91 | #else |
92 | return opcode; |
93 | #endif |
94 | } |
95 | |
96 | bool isOpcode(Opcode); |
97 | |
98 | JSValue execute(ProgramExecutable*, CallFrame*, ScopeChainNode*, JSObject* thisObj, JSValue* exception); |
99 | JSValue execute(FunctionExecutable*, CallFrame*, JSFunction*, JSObject* thisObj, const ArgList& args, ScopeChainNode*, JSValue* exception); |
100 | JSValue execute(EvalExecutable* evalNode, CallFrame* exec, JSObject* thisObj, ScopeChainNode* scopeChain, JSValue* exception); |
101 | |
102 | JSValue retrieveArguments(CallFrame*, JSFunction*) const; |
103 | JSValue retrieveCaller(CallFrame*, InternalFunction*) const; |
104 | void retrieveLastCaller(CallFrame*, int& lineNumber, intptr_t& sourceID, UString& sourceURL, JSValue& function) const; |
105 | |
106 | void getArgumentsData(CallFrame*, JSFunction*&, ptrdiff_t& firstParameterIndex, Register*& argv, int& argc); |
107 | |
108 | SamplingTool* sampler() { return m_sampler.get(); } |
109 | |
110 | NEVER_INLINE JSValue callEval(CallFrame*, RegisterFile*, Register* argv, int argc, int registerOffset, JSValue& exceptionValue); |
111 | NEVER_INLINE HandlerInfo* throwException(CallFrame*&, JSValue&, unsigned bytecodeOffset, bool); |
112 | NEVER_INLINE void debug(CallFrame*, DebugHookID, int firstLine, int lastLine); |
113 | |
114 | void dumpSampleData(ExecState* exec); |
115 | void startSampling(); |
116 | void stopSampling(); |
117 | private: |
118 | enum ExecutionFlag { Normal, InitializeAndReturn }; |
119 | |
120 | CallFrameClosure prepareForRepeatCall(FunctionExecutable*, CallFrame*, JSFunction*, int argCount, ScopeChainNode*, JSValue* exception); |
121 | void endRepeatCall(CallFrameClosure&); |
122 | JSValue execute(CallFrameClosure&, JSValue* exception); |
123 | |
124 | JSValue execute(EvalExecutable*, CallFrame*, JSObject* thisObject, int globalRegisterOffset, ScopeChainNode*, JSValue* exception); |
125 | |
126 | #if USE(INTERPRETER) |
127 | NEVER_INLINE bool resolve(CallFrame*, Instruction*, JSValue& exceptionValue); |
128 | NEVER_INLINE bool resolveSkip(CallFrame*, Instruction*, JSValue& exceptionValue); |
129 | NEVER_INLINE bool resolveGlobal(CallFrame*, Instruction*, JSValue& exceptionValue); |
130 | NEVER_INLINE void resolveBase(CallFrame*, Instruction* vPC); |
131 | NEVER_INLINE bool resolveBaseAndProperty(CallFrame*, Instruction*, JSValue& exceptionValue); |
132 | NEVER_INLINE ScopeChainNode* createExceptionScope(CallFrame*, const Instruction* vPC); |
133 | |
134 | void tryCacheGetByID(CallFrame*, CodeBlock*, Instruction*, JSValue baseValue, const Identifier& propertyName, const PropertySlot&); |
135 | void uncacheGetByID(CodeBlock*, Instruction* vPC); |
136 | void tryCachePutByID(CallFrame*, CodeBlock*, Instruction*, JSValue baseValue, const PutPropertySlot&); |
137 | void uncachePutByID(CodeBlock*, Instruction* vPC); |
138 | #endif |
139 | |
140 | NEVER_INLINE bool unwindCallFrame(CallFrame*&, JSValue, unsigned& bytecodeOffset, CodeBlock*&); |
141 | |
142 | static ALWAYS_INLINE CallFrame* slideRegisterWindowForCall(CodeBlock*, RegisterFile*, CallFrame*, size_t registerOffset, int argc); |
143 | |
144 | static CallFrame* findFunctionCallFrame(CallFrame*, InternalFunction*); |
145 | |
146 | JSValue privateExecute(ExecutionFlag, RegisterFile*, CallFrame*, JSValue* exception); |
147 | |
148 | void dumpCallFrame(CallFrame*); |
149 | void dumpRegisters(CallFrame*); |
150 | |
151 | bool isCallBytecode(Opcode opcode) { return opcode == getOpcode(id: op_call) || opcode == getOpcode(id: op_construct) || opcode == getOpcode(id: op_call_eval); } |
152 | |
153 | void enableSampler(); |
154 | int m_sampleEntryDepth; |
155 | OwnPtr<SamplingTool> m_sampler; |
156 | |
157 | int m_reentryDepth; |
158 | |
159 | RegisterFile m_registerFile; |
160 | |
161 | #if HAVE(COMPUTED_GOTO) |
162 | Opcode m_opcodeTable[numOpcodeIDs]; // Maps OpcodeID => Opcode for compiling |
163 | HashMap<Opcode, OpcodeID> m_opcodeIDTable; // Maps Opcode => OpcodeID for decompiling |
164 | #endif |
165 | }; |
166 | |
167 | } // namespace JSC |
168 | |
169 | #endif // Interpreter_h |
170 | |