1 /* 2 * Copyright 2000-2005 Sun Microsystems, Inc. All Rights Reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. 8 * 9 * This code is distributed in the hope that it will be useful, but WITHOUT 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 12 * version 2 for more details (a copy is included in the LICENSE file that 13 * accompanied this code). 14 * 15 * You should have received a copy of the GNU General Public License version 16 * 2 along with this work; if not, write to the Free Software Foundation, 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 18 * 19 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, 20 * CA 95054 USA or visit www.sun.com if you need additional information or 21 * have any questions. 22 * 23 */ 24 25 package sun.jvm.hotspot.code; 26 27 import java.io.*; 28 import java.util.*; 29 30 import sun.jvm.hotspot.asm.x86.*; 31 import sun.jvm.hotspot.compiler.*; 32 import sun.jvm.hotspot.debugger.*; 33 import sun.jvm.hotspot.runtime.*; 34 import sun.jvm.hotspot.types.*; 35 import sun.jvm.hotspot.utilities.*; 36 37 public class CodeBlob extends VMObject { 38 private static AddressField nameField; 39 private static CIntegerField sizeField; 40 private static CIntegerField headerSizeField; 41 private static CIntegerField relocationSizeField; 42 private static CIntegerField instructionsOffsetField; 43 private static CIntegerField frameCompleteOffsetField; 44 private static CIntegerField dataOffsetField; 45 private static CIntegerField oopsOffsetField; 46 private static CIntegerField oopsLengthField; 47 private static CIntegerField frameSizeField; 48 private static AddressField oopMapsField; 49 50 // Only used by server compiler on x86; computed over in SA rather 51 // than relying on computation in target VM 52 private static final int NOT_YET_COMPUTED = -2; 53 private static final int UNDEFINED = -1; 54 private int linkOffset = NOT_YET_COMPUTED; 55 private static int matcherInterpreterFramePointerReg; 56 57 static { 58 VM.registerVMInitializedObserver(new Observer() { 59 public void update(Observable o, Object data) { 60 initialize(VM.getVM().getTypeDataBase()); 61 } 62 }); 63 } 64 65 private static void initialize(TypeDataBase db) { 66 Type type = db.lookupType("CodeBlob"); 67 68 nameField = type.getAddressField("_name"); 69 sizeField = type.getCIntegerField("_size"); 70 headerSizeField = type.getCIntegerField("_header_size"); 71 relocationSizeField = type.getCIntegerField("_relocation_size"); 72 frameCompleteOffsetField = type.getCIntegerField("_frame_complete_offset"); 73 instructionsOffsetField = type.getCIntegerField("_instructions_offset"); 74 dataOffsetField = type.getCIntegerField("_data_offset"); 75 oopsOffsetField = type.getCIntegerField("_oops_offset"); 76 oopsLengthField = type.getCIntegerField("_oops_length"); 77 frameSizeField = type.getCIntegerField("_frame_size"); 78 oopMapsField = type.getAddressField("_oop_maps"); 79 80 if (VM.getVM().isServerCompiler()) { 81 matcherInterpreterFramePointerReg = 82 db.lookupIntConstant("Matcher::interpreter_frame_pointer_reg").intValue(); 83 } 84 } 85 86 public CodeBlob(Address addr) { 87 super(addr); 88 } 89 90 // Typing 91 public boolean isBufferBlob() { return false; } 92 public boolean isNMethod() { return false; } 93 public boolean isRuntimeStub() { return false; } 94 public boolean isDeoptimizationStub() { return false; } 95 public boolean isUncommonTrapStub() { return false; } 96 public boolean isExceptionStub() { return false; } 97 public boolean isSafepointStub() { return false; } 98 99 // Fine grain nmethod support: isNmethod() == isJavaMethod() || isNativeMethod() || isOSRMethod() 100 public boolean isJavaMethod() { return false; } 101 public boolean isNativeMethod() { return false; } 102 /** On-Stack Replacement method */ 103 public boolean isOSRMethod() { return false; } 104 105 // Boundaries 106 public Address headerBegin() { 107 return addr; 108 } 109 110 public Address headerEnd() { 111 return addr.addOffsetTo(headerSizeField.getValue(addr)); 112 } 113 114 // FIXME: add RelocInfo 115 // public RelocInfo relocationBegin(); 116 // public RelocInfo relocationEnd(); 117 118 public Address instructionsBegin() { 119 return headerBegin().addOffsetTo(instructionsOffsetField.getValue(addr)); 120 } 121 122 public Address instructionsEnd() { 123 return headerBegin().addOffsetTo(dataOffsetField.getValue(addr)); 124 } 125 126 public Address dataBegin() { 127 return headerBegin().addOffsetTo(dataOffsetField.getValue(addr)); 128 } 129 130 public Address dataEnd() { 131 return headerBegin().addOffsetTo(sizeField.getValue(addr)); 132 } 133 134 public Address oopsBegin() { 135 return headerBegin().addOffsetTo(oopsOffsetField.getValue(addr)); 136 } 137 138 public Address oopsEnd() { 139 return oopsBegin().addOffsetTo(getOopsLength()); 140 } 141 142 // Offsets 143 public int getRelocationOffset() { return (int) headerSizeField.getValue(addr); } 144 public int getInstructionsOffset() { return (int) instructionsOffsetField.getValue(addr); } 145 public int getDataOffset() { return (int) dataOffsetField.getValue(addr); } 146 public int getOopsOffset() { return (int) oopsOffsetField.getValue(addr); } 147 148 // Sizes 149 public int getSize() { return (int) sizeField.getValue(addr); } 150 public int getHeaderSize() { return (int) headerSizeField.getValue(addr); } 151 // FIXME: add getRelocationSize() 152 public int getInstructionsSize() { return (int) instructionsEnd().minus(instructionsBegin()); } 153 public int getDataSize() { return (int) dataEnd().minus(dataBegin()); } 154 155 // Containment 156 public boolean blobContains(Address addr) { return headerBegin().lessThanOrEqual(addr) && dataEnd().greaterThan(addr); } 157 // FIXME: add relocationContains 158 public boolean instructionsContains(Address addr) { return instructionsBegin().lessThanOrEqual(addr) && instructionsEnd().greaterThan(addr); } 159 public boolean dataContains(Address addr) { return dataBegin().lessThanOrEqual(addr) && dataEnd().greaterThan(addr); } 160 public boolean oopsContains(Address addr) { return oopsBegin().lessThanOrEqual(addr) && oopsEnd().greaterThan(addr); } 161 public boolean contains(Address addr) { return instructionsContains(addr); } 162 public boolean isFrameCompleteAt(Address a) { return instructionsContains(a) && a.minus(instructionsBegin()) >= frameCompleteOffsetField.getValue(addr); } 163 164 /** Support for oops in scopes and relocs. Note: index 0 is reserved for null. */ 165 public OopHandle getOopAt(int index) { 166 if (index == 0) return null; 167 if (Assert.ASSERTS_ENABLED) { 168 Assert.that(index > 0 && index <= getOopsLength(), "must be a valid non-zero index"); 169 } 170 return oopsBegin().getOopHandleAt((index - 1) * VM.getVM().getOopSize()); 171 } 172 173 // Reclamation support (really only used by the nmethods, but in order to get asserts to work 174 // in the CodeCache they are defined virtual here) 175 public boolean isZombie() { return false; } 176 public boolean isLockedByVM() { return false; } 177 178 /** OopMap for frame; can return null if none available */ 179 public OopMapSet getOopMaps() { 180 Address oopMapsAddr = oopMapsField.getValue(addr); 181 if (oopMapsAddr == null) { 182 return null; 183 } 184 return new OopMapSet(oopMapsAddr); 185 } 186 // FIXME: not yet implementable 187 // void set_oop_maps(OopMapSet* p); 188 189 public OopMap getOopMapForReturnAddress(Address returnAddress, boolean debugging) { 190 Address pc = returnAddress; 191 if (Assert.ASSERTS_ENABLED) { 192 Assert.that(getOopMaps() != null, "nope"); 193 } 194 return getOopMaps().findMapAtOffset(pc.minus(instructionsBegin()), debugging); 195 } 196 197 // virtual void preserve_callee_argument_oops(frame fr, const RegisterMap* reg_map, void f(oop*)) { ShouldNotReachHere(); } 198 // FIXME; 199 200 /** NOTE: this returns a size in BYTES in this system! */ 201 public long getFrameSize() { 202 return VM.getVM().getAddressSize() * frameSizeField.getValue(addr); 203 } 204 205 // Returns true, if the next frame is responsible for GC'ing oops passed as arguments 206 public boolean callerMustGCArguments(JavaThread thread) { return false; } 207 208 public String getName() { 209 return CStringUtilities.getString(nameField.getValue(addr)); 210 } 211 212 // FIXME: NOT FINISHED 213 214 // FIXME: add more accessors 215 216 public void print() { 217 printOn(System.out); 218 } 219 220 public void printOn(PrintStream tty) { 221 tty.print(getName()); 222 printComponentsOn(tty); 223 } 224 225 protected void printComponentsOn(PrintStream tty) { 226 // FIXME: add relocation information 227 tty.println(" instructions: [" + instructionsBegin() + ", " + instructionsEnd() + "), " + 228 " data: [" + dataBegin() + ", " + dataEnd() + "), " + 229 " oops: [" + oopsBegin() + ", " + oopsEnd() + "), " + 230 " frame size: " + getFrameSize()); 231 } 232 233 //-------------------------------------------------------------------------------- 234 // Internals only below this point 235 // 236 237 private int getOopsLength() { 238 return (int) oopsLengthField.getValue(addr); 239 } 240 }