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annotate graal/com.oracle.graal.lir.amd64/src/com/oracle/graal/lir/amd64/AMD64FrameMap.java @ 21720:d915361cc3a1

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moved asm, bytecode and asm.test code back to com.oracle.graal name space (JBS:GRAAL-53)
author Doug Simon <doug.simon@oracle.com>
date Thu, 04 Jun 2015 13:35:47 +0200
parents 6df25b1418be
children
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1 /*
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2 * Copyright (c) 2013, 2014, Oracle and/or its affiliates. All rights reserved.
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3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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4 *
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5 * This code is free software; you can redistribute it and/or modify it
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6 * under the terms of the GNU General Public License version 2 only, as
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7 * published by the Free Software Foundation.
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8 *
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9 * This code is distributed in the hope that it will be useful, but WITHOUT
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10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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12 * version 2 for more details (a copy is included in the LICENSE file that
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13 * accompanied this code).
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14 *
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15 * You should have received a copy of the GNU General Public License version
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16 * 2 along with this work; if not, write to the Free Software Foundation,
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17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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18 *
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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20 * or visit www.oracle.com if you need additional information or have any
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21 * questions.
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22 */
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23 package com.oracle.graal.lir.amd64;
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24
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25 import com.oracle.jvmci.code.CodeCacheProvider;
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26 import com.oracle.jvmci.code.StackSlot;
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27 import com.oracle.jvmci.code.RegisterConfig;
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28 import com.oracle.jvmci.meta.Kind;
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29 import com.oracle.jvmci.meta.LIRKind;
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30
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31 import static com.oracle.jvmci.code.ValueUtil.*;
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32
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33 import com.oracle.graal.asm.*;
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34 import com.oracle.graal.lir.framemap.*;
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35
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36 /**
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37 * AMD64 specific frame map.
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38 *
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39 * This is the format of an AMD64 stack frame:
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40 *
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41 * <pre>
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42 * Base Contents
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43 *
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44 * : : -----
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45 * caller | incoming overflow argument n | ^
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46 * frame : ... : | positive
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47 * | incoming overflow argument 0 | | offsets
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48 * ---------+--------------------------------+---------------------
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49 * | return address | | ^
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50 * current +--------------------------------+ | | -----
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51 * frame | | | | ^
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52 * : callee save area : | | |
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53 * | | | | |
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54 * +--------------------------------+ | | |
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55 * | spill slot 0 | | negative | |
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56 * : ... : v offsets | |
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57 * | spill slot n | ----- total frame
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58 * +--------------------------------+ frame size
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59 * | alignment padding | size |
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60 * +--------------------------------+ ----- | |
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61 * | outgoing overflow argument n | ^ | |
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62 * : ... : | positive | |
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63 * | outgoing overflow argument 0 | | offsets v v
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64 * %sp--&gt; +--------------------------------+---------------------------
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65 *
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66 * </pre>
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67 *
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68 * The spill slot area also includes stack allocated memory blocks (ALLOCA blocks). The size of such
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69 * a block may be greater than the size of a normal spill slot or the word size.
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70 * <p>
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71 * A runtime can reserve space at the beginning of the overflow argument area. The calling
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72 * convention can specify that the first overflow stack argument is not at offset 0, but at a
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73 * specified offset. Use {@link CodeCacheProvider#getMinimumOutgoingSize()} to make sure that
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74 * call-free methods also have this space reserved. Then the VM can use the memory at offset 0
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75 * relative to the stack pointer.
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76 */
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77 public class AMD64FrameMap extends FrameMap {
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78
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79 private StackSlot rbpSpillSlot;
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80
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81 public AMD64FrameMap(CodeCacheProvider codeCache, RegisterConfig registerConfig) {
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82 super(codeCache, registerConfig);
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83 // (negative) offset relative to sp + total frame size
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84 initialSpillSize = returnAddressSize() + calleeSaveAreaSize();
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85 spillSize = initialSpillSize;
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86 }
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87
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88 @Override
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89 public int totalFrameSize() {
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90 return frameSize() + returnAddressSize();
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91 }
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92
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93 @Override
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94 public int currentFrameSize() {
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95 return alignFrameSize(outgoingSize + spillSize - returnAddressSize());
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96 }
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97
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98 @Override
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99 protected int alignFrameSize(int size) {
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100 return NumUtil.roundUp(size + returnAddressSize(), getTarget().stackAlignment) - returnAddressSize();
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101 }
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102
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103 @Override
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104 public int offsetToCalleeSaveArea() {
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105 return frameSize() - calleeSaveAreaSize();
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106 }
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107
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108 @Override
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109 protected StackSlot allocateNewSpillSlot(LIRKind kind, int additionalOffset) {
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110 return StackSlot.get(kind, -spillSize + additionalOffset, true);
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111 }
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112
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113 /**
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114 * For non-leaf methods, RBP is preserved in the special stack slot required by the HotSpot
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115 * runtime for walking/inspecting frames of such methods.
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116 */
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117 StackSlot allocateRBPSpillSlot() {
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118 assert spillSize == initialSpillSize : "RBP spill slot must be the first allocated stack slots";
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119 rbpSpillSlot = allocateSpillSlot(LIRKind.value(Kind.Long));
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120 assert asStackSlot(rbpSpillSlot).getRawOffset() == -16 : asStackSlot(rbpSpillSlot).getRawOffset();
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121 return rbpSpillSlot;
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122 }
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124 void freeRBPSpillSlot() {
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125 int size = spillSlotSize(LIRKind.value(Kind.Long));
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126 assert spillSize == NumUtil.roundUp(initialSpillSize + size, size) : "RBP spill slot can not be freed after allocation other stack slots";
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127 spillSize = initialSpillSize;
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128 }
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129
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130 public StackSlot allocateDeoptimizationRescueSlot() {
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131 assert spillSize == initialSpillSize || spillSize == initialSpillSize + spillSlotSize(LIRKind.value(Kind.Long)) : "Deoptimization rescue slot must be the first or second (if there is an RBP spill slot) stack slot";
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132 return allocateSpillSlot(LIRKind.value(Kind.Long));
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133 }
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134 }