dfg/DFGAssemblyHelpers.cpp

   1 /*
   2  * Copyright (C) 2011 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 "DFGAssemblyHelpers.h"
  28
  29 #if ENABLE(DFG_JIT)
  30
  31 namespace JSC { namespace DFG {
  32
  33 ExecutableBase* AssemblyHelpers::executableFor(const CodeOrigin& codeOrigin)
  34 {
  35     if (!codeOrigin.inlineCallFrame)
  36         return m_codeBlock->ownerExecutable();
  37
  38     return codeOrigin.inlineCallFrame->executable.get();
  39 }
  40
  41 Vector<BytecodeAndMachineOffset>& AssemblyHelpers::decodedCodeMapFor(CodeBlock* codeBlock)
  42 {
  43     ASSERT(codeBlock == codeBlock->baselineVersion());
  44     ASSERT(codeBlock->getJITType() == JITCode::BaselineJIT);
  45     ASSERT(codeBlock->jitCodeMap());
  46
  47     HashMap<CodeBlock*, Vector<BytecodeAndMachineOffset> >::AddResult result = m_decodedCodeMaps.add(codeBlock, Vector<BytecodeAndMachineOffset>());
  48
  49     if (result.isNewEntry)
  50         codeBlock->jitCodeMap()->decode(result.iterator->value);
  51
  52     return result.iterator->value;
  53 }
  54
  55 #if ENABLE(SAMPLING_FLAGS)
  56 void AssemblyHelpers::setSamplingFlag(int32_t flag)
  57 {
  58     ASSERT(flag >= 1);
  59     ASSERT(flag <= 32);
  60     or32(TrustedImm32(1u << (flag - 1)), AbsoluteAddress(SamplingFlags::addressOfFlags()));
  61 }
  62
  63 void AssemblyHelpers::clearSamplingFlag(int32_t flag)
  64 {
  65     ASSERT(flag >= 1);
  66     ASSERT(flag <= 32);
  67     and32(TrustedImm32(~(1u << (flag - 1))), AbsoluteAddress(SamplingFlags::addressOfFlags()));
  68 }
  69 #endif
  70
  71 #if DFG_ENABLE(JIT_ASSERT)
  72 #if USE(JSVALUE64)
  73 void AssemblyHelpers::jitAssertIsInt32(GPRReg gpr)
  74 {
  75 #if CPU(X86_64)
  76     Jump checkInt32 = branch64(BelowOrEqual, gpr, TrustedImm64(static_cast<uintptr_t>(0xFFFFFFFFu)));
  77     breakpoint();
  78     checkInt32.link(this);
  79 #else
  80     UNUSED_PARAM(gpr);
  81 #endif
  82 }
  83
  84 void AssemblyHelpers::jitAssertIsJSInt32(GPRReg gpr)
  85 {
  86     Jump checkJSInt32 = branch64(AboveOrEqual, gpr, GPRInfo::tagTypeNumberRegister);
  87     breakpoint();
  88     checkJSInt32.link(this);
  89 }
  90
  91 void AssemblyHelpers::jitAssertIsJSNumber(GPRReg gpr)
  92 {
  93     Jump checkJSNumber = branchTest64(MacroAssembler::NonZero, gpr, GPRInfo::tagTypeNumberRegister);
  94     breakpoint();
  95     checkJSNumber.link(this);
  96 }
  97
  98 void AssemblyHelpers::jitAssertIsJSDouble(GPRReg gpr)
  99 {
 100     Jump checkJSInt32 = branch64(AboveOrEqual, gpr, GPRInfo::tagTypeNumberRegister);
 101     Jump checkJSNumber = branchTest64(MacroAssembler::NonZero, gpr, GPRInfo::tagTypeNumberRegister);
 102     checkJSInt32.link(this);
 103     breakpoint();
 104     checkJSNumber.link(this);
 105 }
 106
 107 void AssemblyHelpers::jitAssertIsCell(GPRReg gpr)
 108 {
 109     Jump checkCell = branchTest64(MacroAssembler::Zero, gpr, GPRInfo::tagMaskRegister);
 110     breakpoint();
 111     checkCell.link(this);
 112 }
 113 #elif USE(JSVALUE32_64)
 114 void AssemblyHelpers::jitAssertIsInt32(GPRReg gpr)
 115 {
 116     UNUSED_PARAM(gpr);
 117 }
 118
 119 void AssemblyHelpers::jitAssertIsJSInt32(GPRReg gpr)
 120 {
 121     Jump checkJSInt32 = branch32(Equal, gpr, TrustedImm32(JSValue::Int32Tag));
 122     breakpoint();
 123     checkJSInt32.link(this);
 124 }
 125
 126 void AssemblyHelpers::jitAssertIsJSNumber(GPRReg gpr)
 127 {
 128     Jump checkJSInt32 = branch32(Equal, gpr, TrustedImm32(JSValue::Int32Tag));
 129     Jump checkJSDouble = branch32(Below, gpr, TrustedImm32(JSValue::LowestTag));
 130     breakpoint();
 131     checkJSInt32.link(this);
 132     checkJSDouble.link(this);
 133 }
 134
 135 void AssemblyHelpers::jitAssertIsJSDouble(GPRReg gpr)
 136 {
 137     Jump checkJSDouble = branch32(Below, gpr, TrustedImm32(JSValue::LowestTag));
 138     breakpoint();
 139     checkJSDouble.link(this);
 140 }
 141
 142 void AssemblyHelpers::jitAssertIsCell(GPRReg gpr)
 143 {
 144     Jump checkCell = branch32(Equal, gpr, TrustedImm32(JSValue::CellTag));
 145     breakpoint();
 146     checkCell.link(this);
 147 }
 148 #endif // USE(JSVALUE32_64)
 149
 150 void AssemblyHelpers::jitAssertHasValidCallFrame()
 151 {
 152     Jump checkCFR = branchTestPtr(Zero, GPRInfo::callFrameRegister, TrustedImm32(7));
 153     breakpoint();
 154     checkCFR.link(this);
 155 }
 156 #endif // DFG_ENABLE(JIT_ASSERT)
 157
 158 } } // namespace JSC::DFG
 159
 160 #endif // ENABLE(DFG_JIT)
 161