code.vuplus.com Git - vuplus_webkit/blob - Source/JavaScriptCore/jit/JITCall32_64.cpp

   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  * 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
  28 #if ENABLE(JIT)
  29 #if USE(JSVALUE32_64)
  30 #include "JIT.h"
  31
  32 #include "CodeBlock.h"
  33 #include "Interpreter.h"
  34 #include "JITInlineMethods.h"
  35 #include "JITStubCall.h"
  36 #include "JSArray.h"
  37 #include "JSFunction.h"
  38 #include "ResultType.h"
  39 #include "SamplingTool.h"
  40
  41 #ifndef NDEBUG
  42 #include <stdio.h>
  43 #endif
  44
  45 using namespace std;
  46
  47 namespace JSC {
  48
  49 void JIT::compileOpCallInitializeCallFrame()
  50 {
  51     // regT0 holds callee, regT1 holds argCount
  52     loadPtr(Address(regT0, OBJECT_OFFSETOF(JSFunction, m_scopeChain)), regT3); // scopeChain
  53     emitPutIntToCallFrameHeader(regT1, RegisterFile::ArgumentCount);
  54     emitPutCellToCallFrameHeader(regT0, RegisterFile::Callee);
  55     emitPutCellToCallFrameHeader(regT3, RegisterFile::ScopeChain);
  56 }
  57
  58 void JIT::emit_op_call_put_result(Instruction* instruction)
  59 {
  60     int dst = instruction[1].u.operand;
  61     emitStore(dst, regT1, regT0);
  62 }
  63
  64 void JIT::compileOpCallVarargs(Instruction* instruction)
  65 {
  66     int callee = instruction[1].u.operand;
  67     int argCountRegister = instruction[2].u.operand;
  68     int registerOffset = instruction[3].u.operand;
  69
  70     emitLoad(callee, regT1, regT0);
  71     emitLoadPayload(argCountRegister, regT2); // argCount
  72     addPtr(Imm32(registerOffset), regT2, regT3); // registerOffset
  73
  74     emitJumpSlowCaseIfNotJSCell(callee, regT1);
  75     addSlowCase(branchPtr(NotEqual, Address(regT0), TrustedImmPtr(m_globalData->jsFunctionVPtr)));
  76
  77     // Speculatively roll the callframe, assuming argCount will match the arity.
  78     mul32(TrustedImm32(sizeof(Register)), regT3, regT3);
  79     addPtr(callFrameRegister, regT3);
  80     store32(TrustedImm32(JSValue::CellTag), tagFor(RegisterFile::CallerFrame, regT3));
  81     storePtr(callFrameRegister, payloadFor(RegisterFile::CallerFrame, regT3));
  82     move(regT3, callFrameRegister);
  83
  84     move(regT2, regT1); // argCount
  85
  86     emitNakedCall(m_globalData->jitStubs->ctiVirtualCall());
  87
  88     sampleCodeBlock(m_codeBlock);
  89 }
  90
  91 void JIT::compileOpCallVarargsSlowCase(Instruction* instruction, Vector<SlowCaseEntry>::iterator& iter)
  92 {
  93     int callee = instruction[1].u.operand;
  94
  95     linkSlowCaseIfNotJSCell(iter, callee);
  96     linkSlowCase(iter);
  97
  98     JITStubCall stubCall(this, cti_op_call_NotJSFunction);
  99     stubCall.addArgument(regT1, regT0);
 100     stubCall.addArgument(regT3);
 101     stubCall.addArgument(regT2);
 102     stubCall.call();
 103
 104     sampleCodeBlock(m_codeBlock);
 105 }
 106
 107 void JIT::emit_op_ret(Instruction* currentInstruction)
 108 {
 109     emitOptimizationCheck(RetOptimizationCheck);
 110
 111     unsigned dst = currentInstruction[1].u.operand;
 112
 113     emitLoad(dst, regT1, regT0);
 114     emitGetFromCallFrameHeaderPtr(RegisterFile::ReturnPC, regT2);
 115     emitGetFromCallFrameHeaderPtr(RegisterFile::CallerFrame, callFrameRegister);
 116
 117     restoreReturnAddressBeforeReturn(regT2);
 118     ret();
 119 }
 120
 121 void JIT::emit_op_ret_object_or_this(Instruction* currentInstruction)
 122 {
 123     emitOptimizationCheck(RetOptimizationCheck);
 124
 125     unsigned result = currentInstruction[1].u.operand;
 126     unsigned thisReg = currentInstruction[2].u.operand;
 127
 128     emitLoad(result, regT1, regT0);
 129     Jump notJSCell = branch32(NotEqual, regT1, TrustedImm32(JSValue::CellTag));
 130     loadPtr(Address(regT0, JSCell::structureOffset()), regT2);
 131     Jump notObject = emitJumpIfNotObject(regT2);
 132
 133     emitGetFromCallFrameHeaderPtr(RegisterFile::ReturnPC, regT2);
 134     emitGetFromCallFrameHeaderPtr(RegisterFile::CallerFrame, callFrameRegister);
 135
 136     restoreReturnAddressBeforeReturn(regT2);
 137     ret();
 138
 139     notJSCell.link(this);
 140     notObject.link(this);
 141     emitLoad(thisReg, regT1, regT0);
 142
 143     emitGetFromCallFrameHeaderPtr(RegisterFile::ReturnPC, regT2);
 144     emitGetFromCallFrameHeaderPtr(RegisterFile::CallerFrame, callFrameRegister);
 145
 146     restoreReturnAddressBeforeReturn(regT2);
 147     ret();
 148 }
 149
 150 void JIT::emitSlow_op_call(Instruction* currentInstruction, Vector<SlowCaseEntry>::iterator& iter)
 151 {
 152     compileOpCallSlowCase(currentInstruction, iter, m_callLinkInfoIndex++, op_call);
 153 }
 154
 155 void JIT::emitSlow_op_call_eval(Instruction* currentInstruction, Vector<SlowCaseEntry>::iterator& iter)
 156 {
 157     compileOpCallSlowCase(currentInstruction, iter, m_callLinkInfoIndex++, op_call_eval);
 158 }
 159
 160 void JIT::emitSlow_op_call_varargs(Instruction* currentInstruction, Vector<SlowCaseEntry>::iterator& iter)
 161 {
 162     compileOpCallVarargsSlowCase(currentInstruction, iter);
 163 }
 164
 165 void JIT::emitSlow_op_construct(Instruction* currentInstruction, Vector<SlowCaseEntry>::iterator& iter)
 166 {
 167     compileOpCallSlowCase(currentInstruction, iter, m_callLinkInfoIndex++, op_construct);
 168 }
 169
 170 void JIT::emit_op_call(Instruction* currentInstruction)
 171 {
 172     compileOpCall(op_call, currentInstruction, m_callLinkInfoIndex++);
 173 }
 174
 175 void JIT::emit_op_call_eval(Instruction* currentInstruction)
 176 {
 177     compileOpCall(op_call_eval, currentInstruction, m_callLinkInfoIndex++);
 178 }
 179
 180 void JIT::emit_op_call_varargs(Instruction* currentInstruction)
 181 {
 182     compileOpCallVarargs(currentInstruction);
 183 }
 184
 185 void JIT::emit_op_construct(Instruction* currentInstruction)
 186 {
 187     compileOpCall(op_construct, currentInstruction, m_callLinkInfoIndex++);
 188 }
 189
 190 void JIT::compileOpCall(OpcodeID opcodeID, Instruction* instruction, unsigned callLinkInfoIndex)
 191 {
 192     int callee = instruction[1].u.operand;
 193     int argCount = instruction[2].u.operand;
 194     int registerOffset = instruction[3].u.operand;
 195
 196     Jump wasEval;
 197     if (opcodeID == op_call_eval) {
 198         JITStubCall stubCall(this, cti_op_call_eval);
 199         stubCall.addArgument(callee);
 200         stubCall.addArgument(JIT::Imm32(registerOffset));
 201         stubCall.addArgument(JIT::Imm32(argCount));
 202         stubCall.call();
 203         wasEval = branch32(NotEqual, regT1, TrustedImm32(JSValue::EmptyValueTag));
 204     }
 205
 206     emitLoad(callee, regT1, regT0);
 207
 208     DataLabelPtr addressOfLinkedFunctionCheck;
 209
 210     BEGIN_UNINTERRUPTED_SEQUENCE(sequenceOpCall);
 211
 212     Jump jumpToSlow = branchPtrWithPatch(NotEqual, regT0, addressOfLinkedFunctionCheck, TrustedImmPtr(0));
 213
 214     END_UNINTERRUPTED_SEQUENCE(sequenceOpCall);
 215
 216     addSlowCase(jumpToSlow);
 217     ASSERT_JIT_OFFSET(differenceBetween(addressOfLinkedFunctionCheck, jumpToSlow), patchOffsetOpCallCompareToJump);
 218     ASSERT(m_callStructureStubCompilationInfo.size() == callLinkInfoIndex);
 219     m_callStructureStubCompilationInfo.append(StructureStubCompilationInfo());
 220     m_callStructureStubCompilationInfo[callLinkInfoIndex].hotPathBegin = addressOfLinkedFunctionCheck;
 221     m_callStructureStubCompilationInfo[callLinkInfoIndex].isCall = opcodeID != op_construct;
 222
 223     addSlowCase(branch32(NotEqual, regT1, TrustedImm32(JSValue::CellTag)));
 224
 225     // The following is the fast case, only used whan a callee can be linked.
 226
 227     // Fast version of stack frame initialization, directly relative to edi.
 228     // Note that this omits to set up RegisterFile::CodeBlock, which is set in the callee
 229     loadPtr(Address(regT0, OBJECT_OFFSETOF(JSFunction, m_scopeChain)), regT2);
 230
 231     store32(TrustedImm32(JSValue::Int32Tag), tagFor(registerOffset + RegisterFile::ArgumentCount));
 232     store32(Imm32(argCount), payloadFor(registerOffset + RegisterFile::ArgumentCount));
 233     storePtr(callFrameRegister, payloadFor(RegisterFile::CallerFrame + registerOffset, callFrameRegister));
 234     emitStore(registerOffset + RegisterFile::Callee, regT1, regT0);
 235     store32(TrustedImm32(JSValue::CellTag), tagFor(registerOffset + RegisterFile::ScopeChain));
 236     store32(regT2, payloadFor(registerOffset + RegisterFile::ScopeChain));
 237     addPtr(Imm32(registerOffset * sizeof(Register)), callFrameRegister);
 238
 239     // Call to the callee
 240     m_callStructureStubCompilationInfo[callLinkInfoIndex].hotPathOther = emitNakedCall();
 241
 242     if (opcodeID == op_call_eval)
 243         wasEval.link(this);
 244
 245     sampleCodeBlock(m_codeBlock);
 246 }
 247
 248 void JIT::compileOpCallSlowCase(Instruction* instruction, Vector<SlowCaseEntry>::iterator& iter, unsigned callLinkInfoIndex, OpcodeID opcodeID)
 249 {
 250     int callee = instruction[1].u.operand;
 251     int argCount = instruction[2].u.operand;
 252     int registerOffset = instruction[3].u.operand;
 253
 254     linkSlowCase(iter);
 255     linkSlowCase(iter);
 256
 257     // Fast check for JS function.
 258     Jump callLinkFailNotObject = branch32(NotEqual, regT1, TrustedImm32(JSValue::CellTag));
 259     Jump callLinkFailNotJSFunction = branchPtr(NotEqual, Address(regT0), TrustedImmPtr(m_globalData->jsFunctionVPtr));
 260
 261     // Speculatively roll the callframe, assuming argCount will match the arity.
 262     store32(TrustedImm32(JSValue::CellTag), tagFor(RegisterFile::CallerFrame + registerOffset, callFrameRegister));
 263     storePtr(callFrameRegister, payloadFor(RegisterFile::CallerFrame + registerOffset, callFrameRegister));
 264     addPtr(Imm32(registerOffset * static_cast<int>(sizeof(Register))), callFrameRegister);
 265     move(Imm32(argCount), regT1);
 266
 267     m_callStructureStubCompilationInfo[callLinkInfoIndex].callReturnLocation = emitNakedCall(opcodeID == op_construct ? m_globalData->jitStubs->ctiVirtualConstructLink() : m_globalData->jitStubs->ctiVirtualCallLink());
 268
 269     // Done! - return back to the hot path.
 270     ASSERT(OPCODE_LENGTH(op_call) == OPCODE_LENGTH(op_call_eval));
 271     ASSERT(OPCODE_LENGTH(op_call) == OPCODE_LENGTH(op_construct));
 272     emitJumpSlowToHot(jump(), OPCODE_LENGTH(op_call));
 273
 274     // This handles host functions
 275     callLinkFailNotObject.link(this);
 276     callLinkFailNotJSFunction.link(this);
 277
 278     JITStubCall stubCall(this, opcodeID == op_construct ? cti_op_construct_NotJSConstruct : cti_op_call_NotJSFunction);
 279     stubCall.addArgument(callee);
 280     stubCall.addArgument(JIT::Imm32(registerOffset));
 281     stubCall.addArgument(JIT::Imm32(argCount));
 282     stubCall.call();
 283
 284     sampleCodeBlock(m_codeBlock);
 285 }
 286
 287 } // namespace JSC
 288
 289 #endif // USE(JSVALUE32_64)
 290 #endif // ENABLE(JIT)