| 1 | /*
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| 2 | * Copyright (C) 2008 Apple Inc. All rights reserved.
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| 3 | *
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| 4 | * Redistribution and use in source and binary forms, with or without
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| 5 | * modification, are permitted provided that the following conditions
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| 6 | * are met:
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| 7 | *
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| 8 | * 1. Redistributions of source code must retain the above copyright
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| 9 | * notice, this list of conditions and the following disclaimer.
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| 10 | * 2. Redistributions in binary form must reproduce the above copyright
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| 11 | * notice, this list of conditions and the following disclaimer in the
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| 12 | * documentation and/or other materials provided with the distribution.
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| 13 | * 3. Neither the name of Apple Computer, Inc. ("Apple") nor the names of
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| 14 | * its contributors may be used to endorse or promote products derived
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| 15 | * from this software without specific prior written permission.
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| 16 | *
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| 17 | * THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "AS IS" AND ANY
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| 18 | * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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| 19 | * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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| 20 | * DISCLAIMED. IN NO EVENT SHALL APPLE OR ITS CONTRIBUTORS BE LIABLE FOR ANY
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| 21 | * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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| 22 | * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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| 23 | * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
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| 24 | * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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| 25 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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| 26 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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| 27 | */
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| 28 |
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| 29 | #ifndef Machine_h
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| 30 | #define Machine_h
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| 31 |
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| 32 | #include "ArgList.h"
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| 33 | #include "JSCell.h"
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| 34 | #include "JSValue.h"
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| 35 | #include "Opcode.h"
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| 36 | #include "RegisterFile.h"
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| 37 | #include <wtf/HashMap.h>
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| 38 |
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| 39 | namespace JSC {
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| 40 |
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| 41 | class CodeBlock;
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| 42 | class EvalNode;
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| 43 | class FunctionBodyNode;
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| 44 | class Instruction;
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| 45 | class InternalFunction;
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| 46 | class JITCodeBuffer;
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| 47 | class JSFunction;
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| 48 | class JSGlobalObject;
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| 49 | class ProgramNode;
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| 50 | class Register;
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| 51 | class ScopeChainNode;
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| 52 | class SamplingTool;
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| 53 |
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| 54 | #if ENABLE(CTI)
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| 55 |
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| 56 | #if USE(CTI_ARGUMENT)
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| 57 | #define CTI_ARGS void** args
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| 58 | #define ARGS (args)
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| 59 | #else
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| 60 | #define CTI_ARGS void* args, ...
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| 61 | #define ARGS (&args)
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| 62 | #endif
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| 63 |
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| 64 | #if USE(FAST_CALL_CTI_ARGUMENT)
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| 65 |
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| 66 | #if COMPILER(MSVC)
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| 67 | #define SFX_CALL __fastcall
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| 68 | #elif COMPILER(GCC)
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| 69 | #define SFX_CALL __attribute__ ((fastcall))
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| 70 | #else
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| 71 | #error Need to support fastcall calling convention in this compiler
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| 72 | #endif
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| 73 |
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| 74 | #else
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| 75 |
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| 76 | #if COMPILER(MSVC)
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| 77 | #define SFX_CALL __cdecl
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| 78 | #else
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| 79 | #define SFX_CALL
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| 80 | #endif
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| 81 |
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| 82 | #endif
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| 83 |
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| 84 | typedef uint64_t VoidPtrPair;
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| 85 |
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| 86 | typedef union
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| 87 | {
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| 88 | struct { void* first; void* second; } s;
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| 89 | VoidPtrPair i;
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| 90 | } VoidPtrPairValue;
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| 91 | #endif
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| 92 |
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| 93 | enum DebugHookID {
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| 94 | WillExecuteProgram,
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| 95 | DidExecuteProgram,
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| 96 | DidEnterCallFrame,
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| 97 | DidReachBreakpoint,
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| 98 | WillLeaveCallFrame,
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| 99 | WillExecuteStatement
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| 100 | };
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| 101 |
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| 102 | enum { MaxReentryDepth = 128 };
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| 103 |
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| 104 | class Machine {
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| 105 | friend class CTI;
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| 106 | public:
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| 107 | Machine();
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| 108 | ~Machine();
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| 109 |
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| 110 | RegisterFile& registerFile() { return m_registerFile; }
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| 111 |
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| 112 | Opcode getOpcode(OpcodeID id)
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| 113 | {
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| 114 | #if HAVE(COMPUTED_GOTO)
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| 115 | return m_opcodeTable[id];
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| 116 | #else
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| 117 | return id;
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| 118 | #endif
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| 119 | }
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| 120 |
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| 121 | OpcodeID getOpcodeID(Opcode opcode)
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| 122 | {
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| 123 | #if HAVE(COMPUTED_GOTO)
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| 124 | ASSERT(isOpcode(opcode));
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| 125 | return m_opcodeIDTable.get(opcode);
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| 126 | #else
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| 127 | return opcode;
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| 128 | #endif
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| 129 | }
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| 130 |
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| 131 | bool isOpcode(Opcode opcode);
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| 132 |
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| 133 | JSValue* execute(ProgramNode*, CallFrame*, ScopeChainNode*, JSObject* thisObj, JSValue** exception);
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| 134 | JSValue* execute(FunctionBodyNode*, CallFrame*, JSFunction*, JSObject* thisObj, const ArgList& args, ScopeChainNode*, JSValue** exception);
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| 135 | JSValue* execute(EvalNode* evalNode, CallFrame* exec, JSObject* thisObj, ScopeChainNode* scopeChain, JSValue** exception);
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| 136 |
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| 137 | JSValue* retrieveArguments(CallFrame*, JSFunction*) const;
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| 138 | JSValue* retrieveCaller(CallFrame*, InternalFunction*) const;
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| 139 | void retrieveLastCaller(CallFrame*, int& lineNumber, intptr_t& sourceID, UString& sourceURL, JSValue*& function) const;
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| 140 |
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| 141 | void getArgumentsData(CallFrame*, JSFunction*&, ptrdiff_t& firstParameterIndex, Register*& argv, int& argc);
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| 142 | void setTimeoutTime(unsigned timeoutTime) { m_timeoutTime = timeoutTime; }
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| 143 |
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| 144 | void startTimeoutCheck()
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| 145 | {
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| 146 | if (!m_timeoutCheckCount)
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| 147 | resetTimeoutCheck();
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| 148 |
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| 149 | ++m_timeoutCheckCount;
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| 150 | }
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| 151 |
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| 152 | void stopTimeoutCheck()
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| 153 | {
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| 154 | ASSERT(m_timeoutCheckCount);
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| 155 | --m_timeoutCheckCount;
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| 156 | }
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| 157 |
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| 158 | inline void initTimeout()
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| 159 | {
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| 160 | ASSERT(!m_timeoutCheckCount);
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| 161 | resetTimeoutCheck();
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| 162 | m_timeoutTime = 0;
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| 163 | m_timeoutCheckCount = 0;
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| 164 | }
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| 165 |
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| 166 | void setSampler(SamplingTool* sampler) { m_sampler = sampler; }
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| 167 | SamplingTool* sampler() { return m_sampler; }
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| 168 |
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| 169 | #if ENABLE(CTI)
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| 170 |
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| 171 | static void SFX_CALL cti_timeout_check(CTI_ARGS);
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| 172 | static void SFX_CALL cti_register_file_check(CTI_ARGS);
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| 173 |
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| 174 | static JSObject* SFX_CALL cti_op_convert_this(CTI_ARGS);
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| 175 | static void SFX_CALL cti_op_end(CTI_ARGS);
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| 176 | static JSValue* SFX_CALL cti_op_add(CTI_ARGS);
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| 177 | static JSValue* SFX_CALL cti_op_pre_inc(CTI_ARGS);
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| 178 | static int SFX_CALL cti_op_loop_if_less(CTI_ARGS);
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| 179 | static int SFX_CALL cti_op_loop_if_lesseq(CTI_ARGS);
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| 180 | static JSObject* SFX_CALL cti_op_new_object(CTI_ARGS);
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| 181 | static void SFX_CALL cti_op_put_by_id(CTI_ARGS);
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| 182 | static void SFX_CALL cti_op_put_by_id_second(CTI_ARGS);
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| 183 | static void SFX_CALL cti_op_put_by_id_generic(CTI_ARGS);
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| 184 | static void SFX_CALL cti_op_put_by_id_fail(CTI_ARGS);
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| 185 | static JSValue* SFX_CALL cti_op_get_by_id(CTI_ARGS);
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| 186 | static JSValue* SFX_CALL cti_op_get_by_id_second(CTI_ARGS);
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| 187 | static JSValue* SFX_CALL cti_op_get_by_id_generic(CTI_ARGS);
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| 188 | static JSValue* SFX_CALL cti_op_get_by_id_fail(CTI_ARGS);
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| 189 | static JSValue* SFX_CALL cti_op_del_by_id(CTI_ARGS);
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| 190 | static JSValue* SFX_CALL cti_op_instanceof(CTI_ARGS);
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| 191 | static JSValue* SFX_CALL cti_op_mul(CTI_ARGS);
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| 192 | static JSObject* SFX_CALL cti_op_new_func(CTI_ARGS);
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| 193 | static VoidPtrPair SFX_CALL cti_op_call_JSFunction(CTI_ARGS);
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| 194 | static JSValue* SFX_CALL cti_op_call_NotJSFunction(CTI_ARGS);
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| 195 | static void SFX_CALL cti_op_create_arguments(CTI_ARGS);
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| 196 | static void SFX_CALL cti_op_create_arguments_no_params(CTI_ARGS);
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| 197 | static void SFX_CALL cti_op_tear_off_activation(CTI_ARGS);
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| 198 | static void SFX_CALL cti_op_tear_off_arguments(CTI_ARGS);
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| 199 | static void SFX_CALL cti_op_profile_will_call(CTI_ARGS);
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| 200 | static void SFX_CALL cti_op_profile_did_call(CTI_ARGS);
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| 201 | static void SFX_CALL cti_op_ret_scopeChain(CTI_ARGS);
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| 202 | static JSObject* SFX_CALL cti_op_new_array(CTI_ARGS);
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| 203 | static JSValue* SFX_CALL cti_op_resolve(CTI_ARGS);
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| 204 | static JSValue* SFX_CALL cti_op_resolve_global(CTI_ARGS);
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| 205 | static JSObject* SFX_CALL cti_op_construct_JSConstructFast(CTI_ARGS);
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| 206 | static VoidPtrPair SFX_CALL cti_op_construct_JSConstruct(CTI_ARGS);
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| 207 | static JSValue* SFX_CALL cti_op_construct_NotJSConstruct(CTI_ARGS);
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| 208 | static JSValue* SFX_CALL cti_op_get_by_val(CTI_ARGS);
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| 209 | static VoidPtrPair SFX_CALL cti_op_resolve_func(CTI_ARGS);
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| 210 | static JSValue* SFX_CALL cti_op_sub(CTI_ARGS);
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| 211 | static void SFX_CALL cti_op_put_by_val(CTI_ARGS);
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| 212 | static void SFX_CALL cti_op_put_by_val_array(CTI_ARGS);
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| 213 | static JSValue* SFX_CALL cti_op_lesseq(CTI_ARGS);
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| 214 | static int SFX_CALL cti_op_loop_if_true(CTI_ARGS);
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| 215 | static JSValue* SFX_CALL cti_op_resolve_base(CTI_ARGS);
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| 216 | static JSValue* SFX_CALL cti_op_negate(CTI_ARGS);
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| 217 | static JSValue* SFX_CALL cti_op_resolve_skip(CTI_ARGS);
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| 218 | static JSValue* SFX_CALL cti_op_div(CTI_ARGS);
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| 219 | static JSValue* SFX_CALL cti_op_pre_dec(CTI_ARGS);
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| 220 | static int SFX_CALL cti_op_jless(CTI_ARGS);
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| 221 | static JSValue* SFX_CALL cti_op_not(CTI_ARGS);
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| 222 | static int SFX_CALL cti_op_jtrue(CTI_ARGS);
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| 223 | static VoidPtrPair SFX_CALL cti_op_post_inc(CTI_ARGS);
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| 224 | static JSValue* SFX_CALL cti_op_eq(CTI_ARGS);
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| 225 | static JSValue* SFX_CALL cti_op_lshift(CTI_ARGS);
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| 226 | static JSValue* SFX_CALL cti_op_bitand(CTI_ARGS);
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| 227 | static JSValue* SFX_CALL cti_op_rshift(CTI_ARGS);
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| 228 | static JSValue* SFX_CALL cti_op_bitnot(CTI_ARGS);
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| 229 | static VoidPtrPair SFX_CALL cti_op_resolve_with_base(CTI_ARGS);
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| 230 | static JSObject* SFX_CALL cti_op_new_func_exp(CTI_ARGS);
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| 231 | static JSValue* SFX_CALL cti_op_mod(CTI_ARGS);
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| 232 | static JSValue* SFX_CALL cti_op_less(CTI_ARGS);
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| 233 | static JSValue* SFX_CALL cti_op_neq(CTI_ARGS);
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| 234 | static VoidPtrPair SFX_CALL cti_op_post_dec(CTI_ARGS);
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| 235 | static JSValue* SFX_CALL cti_op_urshift(CTI_ARGS);
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| 236 | static JSValue* SFX_CALL cti_op_bitxor(CTI_ARGS);
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| 237 | static JSObject* SFX_CALL cti_op_new_regexp(CTI_ARGS);
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| 238 | static JSValue* SFX_CALL cti_op_bitor(CTI_ARGS);
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| 239 | static JSValue* SFX_CALL cti_op_call_eval(CTI_ARGS);
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| 240 | static JSValue* SFX_CALL cti_op_throw(CTI_ARGS);
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| 241 | static JSPropertyNameIterator* SFX_CALL cti_op_get_pnames(CTI_ARGS);
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| 242 | static JSValue* SFX_CALL cti_op_next_pname(CTI_ARGS);
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| 243 | static void SFX_CALL cti_op_push_scope(CTI_ARGS);
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| 244 | static void SFX_CALL cti_op_pop_scope(CTI_ARGS);
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| 245 | static JSValue* SFX_CALL cti_op_typeof(CTI_ARGS);
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| 246 | static JSValue* SFX_CALL cti_op_is_undefined(CTI_ARGS);
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| 247 | static JSValue* SFX_CALL cti_op_is_boolean(CTI_ARGS);
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| 248 | static JSValue* SFX_CALL cti_op_is_number(CTI_ARGS);
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| 249 | static JSValue* SFX_CALL cti_op_is_string(CTI_ARGS);
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| 250 | static JSValue* SFX_CALL cti_op_is_object(CTI_ARGS);
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| 251 | static JSValue* SFX_CALL cti_op_is_function(CTI_ARGS);
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| 252 | static JSValue* SFX_CALL cti_op_stricteq(CTI_ARGS);
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| 253 | static JSValue* SFX_CALL cti_op_nstricteq(CTI_ARGS);
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| 254 | static JSValue* SFX_CALL cti_op_to_jsnumber(CTI_ARGS);
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| 255 | static JSValue* SFX_CALL cti_op_in(CTI_ARGS);
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| 256 | static JSObject* SFX_CALL cti_op_push_new_scope(CTI_ARGS);
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| 257 | static void SFX_CALL cti_op_jmp_scopes(CTI_ARGS);
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| 258 | static void SFX_CALL cti_op_put_by_index(CTI_ARGS);
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| 259 | static void* SFX_CALL cti_op_switch_imm(CTI_ARGS);
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| 260 | static void* SFX_CALL cti_op_switch_char(CTI_ARGS);
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| 261 | static void* SFX_CALL cti_op_switch_string(CTI_ARGS);
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| 262 | static JSValue* SFX_CALL cti_op_del_by_val(CTI_ARGS);
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| 263 | static void SFX_CALL cti_op_put_getter(CTI_ARGS);
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| 264 | static void SFX_CALL cti_op_put_setter(CTI_ARGS);
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| 265 | static JSObject* SFX_CALL cti_op_new_error(CTI_ARGS);
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| 266 | static void SFX_CALL cti_op_debug(CTI_ARGS);
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| 267 |
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| 268 | static JSValue* SFX_CALL cti_allocate_number(CTI_ARGS);
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| 269 |
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| 270 | static JSValue* SFX_CALL cti_vm_throw(CTI_ARGS);
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| 271 | static void* SFX_CALL cti_vm_compile(CTI_ARGS);
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| 272 | static void* SFX_CALL cti_vm_lazyLinkCall(CTI_ARGS);
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| 273 | static JSObject* SFX_CALL cti_op_push_activation(CTI_ARGS);
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| 274 |
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| 275 | #endif // ENABLE(CTI)
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| 276 |
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| 277 | // Default number of ticks before a timeout check should be done.
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| 278 | static const int initialTickCountThreshold = 1024;
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| 279 |
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| 280 | bool isJSArray(JSValue* v) { return !JSImmediate::isImmediate(v) && v->asCell()->vptr() == m_jsArrayVptr; }
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| 281 | bool isJSString(JSValue* v) { return !JSImmediate::isImmediate(v) && v->asCell()->vptr() == m_jsStringVptr; }
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| 282 |
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| 283 | private:
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| 284 | enum ExecutionFlag { Normal, InitializeAndReturn };
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| 285 |
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| 286 | NEVER_INLINE JSValue* callEval(CallFrame*, JSObject* thisObject, ScopeChainNode*, RegisterFile*, int argv, int argc, JSValue*& exceptionValue);
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| 287 | JSValue* execute(EvalNode*, CallFrame*, JSObject* thisObject, int registerOffset, ScopeChainNode*, JSValue** exception);
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| 288 |
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| 289 | NEVER_INLINE void debug(CallFrame*, DebugHookID, int firstLine, int lastLine);
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| 290 |
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| 291 | NEVER_INLINE bool resolve(CallFrame*, Instruction*, JSValue*& exceptionValue);
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| 292 | NEVER_INLINE bool resolveSkip(CallFrame*, Instruction*, JSValue*& exceptionValue);
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| 293 | NEVER_INLINE bool resolveGlobal(CallFrame*, Instruction*, JSValue*& exceptionValue);
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| 294 | NEVER_INLINE void resolveBase(CallFrame*, Instruction* vPC);
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| 295 | NEVER_INLINE bool resolveBaseAndProperty(CallFrame*, Instruction*, JSValue*& exceptionValue);
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| 296 | NEVER_INLINE ScopeChainNode* createExceptionScope(CallFrame*, const Instruction* vPC);
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| 297 |
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| 298 | NEVER_INLINE bool unwindCallFrame(CallFrame*&, JSValue*, const Instruction*&, CodeBlock*&);
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| 299 | NEVER_INLINE Instruction* throwException(CallFrame*&, JSValue*&, const Instruction*, bool);
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| 300 | NEVER_INLINE bool resolveBaseAndFunc(CallFrame*, Instruction*, JSValue*& exceptionValue);
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| 301 |
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| 302 | static ALWAYS_INLINE CallFrame* slideRegisterWindowForCall(CodeBlock*, RegisterFile*, CallFrame*, size_t registerOffset, int argc);
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| 303 |
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| 304 | static CallFrame* findFunctionCallFrame(CallFrame*, InternalFunction*);
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| 305 |
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| 306 | JSValue* privateExecute(ExecutionFlag, RegisterFile*, CallFrame*, JSValue** exception);
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| 307 |
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| 308 | void dumpCallFrame(const RegisterFile*, CallFrame*);
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| 309 | void dumpRegisters(const RegisterFile*, CallFrame*);
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| 310 |
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| 311 | JSValue* checkTimeout(JSGlobalObject*);
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| 312 | void resetTimeoutCheck();
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| 313 |
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| 314 | void tryCacheGetByID(CallFrame*, CodeBlock*, Instruction*, JSValue* baseValue, const Identifier& propertyName, const PropertySlot&);
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| 315 | void uncacheGetByID(CodeBlock*, Instruction* vPC);
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| 316 | void tryCachePutByID(CallFrame*, CodeBlock*, Instruction*, JSValue* baseValue, const PutPropertySlot&);
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| 317 | void uncachePutByID(CodeBlock*, Instruction* vPC);
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| 318 |
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| 319 | bool isCallOpcode(Opcode opcode) { return opcode == getOpcode(op_call) || opcode == getOpcode(op_construct) || opcode == getOpcode(op_call_eval); }
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| 320 |
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| 321 | #if ENABLE(CTI)
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| 322 | static void throwStackOverflowPreviousFrame(CallFrame*, JSGlobalData*, void*& returnAddress);
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| 323 |
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| 324 | void tryCTICacheGetByID(CallFrame*, CodeBlock*, void* returnAddress, JSValue* baseValue, const Identifier& propertyName, const PropertySlot&);
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| 325 | void tryCTICachePutByID(CallFrame*, CodeBlock*, void* returnAddress, JSValue* baseValue, const PutPropertySlot&);
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| 326 |
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| 327 | void* getCTIArrayLengthTrampoline(CallFrame*, CodeBlock*);
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| 328 | void* getCTIStringLengthTrampoline(CallFrame*, CodeBlock*);
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| 329 |
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| 330 | JITCodeBuffer* jitCodeBuffer() const { return m_jitCodeBuffer.get(); }
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| 331 | #endif
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| 332 |
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| 333 | SamplingTool* m_sampler;
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| 334 |
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| 335 | #if ENABLE(CTI)
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| 336 | void* m_ctiArrayLengthTrampoline;
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| 337 | void* m_ctiStringLengthTrampoline;
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| 338 |
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| 339 | OwnPtr<JITCodeBuffer> m_jitCodeBuffer;
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| 340 | #endif
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| 341 |
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| 342 | int m_reentryDepth;
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| 343 | unsigned m_timeoutTime;
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| 344 | unsigned m_timeAtLastCheckTimeout;
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| 345 | unsigned m_timeExecuting;
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| 346 | unsigned m_timeoutCheckCount;
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| 347 | unsigned m_ticksUntilNextTimeoutCheck;
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| 348 |
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| 349 | RegisterFile m_registerFile;
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| 350 |
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| 351 | void* m_jsArrayVptr;
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| 352 | void* m_jsStringVptr;
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| 353 | void* m_jsFunctionVptr;
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| 354 |
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| 355 | #if HAVE(COMPUTED_GOTO)
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| 356 | Opcode m_opcodeTable[numOpcodeIDs]; // Maps OpcodeID => Opcode for compiling
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| 357 | HashMap<Opcode, OpcodeID> m_opcodeIDTable; // Maps Opcode => OpcodeID for decompiling
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| 358 | #endif
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| 359 | };
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| 360 |
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| 361 | } // namespace JSC
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| 362 |
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| 363 | #endif // Machine_h
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