Mercurial > hg > truffle
annotate agent/src/share/classes/sun/jvm/hotspot/oops/Klass.java @ 6972:bd7a7ce2e264
6830717: replay of compilations would help with debugging
Summary: When java process crashed in compiler thread, repeat the compilation process will help finding root cause. This is done with using SA dump application class data and replay data from core dump, then use debug version of jvm to recompile the problematic java method.
Reviewed-by: kvn, twisti, sspitsyn
Contributed-by: yumin.qi@oracle.com
| author | minqi |
|---|---|
| date | Mon, 12 Nov 2012 14:03:53 -0800 |
| parents | d8ce2825b193 |
| children | 71180a6e5080 |
| rev | line source |
|---|---|
| 0 | 1 /* |
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2 * Copyright (c) 2000, 2012, Oracle and/or its affiliates. All rights reserved. |
| 0 | 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 * | |
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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. |
| 0 | 22 * |
| 23 */ | |
| 24 | |
| 25 package sun.jvm.hotspot.oops; | |
| 26 | |
| 27 import java.io.*; | |
| 28 import java.util.*; | |
| 29 import sun.jvm.hotspot.debugger.*; | |
| 30 import sun.jvm.hotspot.runtime.*; | |
| 31 import sun.jvm.hotspot.types.*; | |
| 32 | |
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33 public class Klass extends Metadata implements ClassConstants { |
| 0 | 34 static { |
| 35 VM.registerVMInitializedObserver(new Observer() { | |
| 36 public void update(Observable o, Object data) { | |
| 37 initialize(VM.getVM().getTypeDataBase()); | |
| 38 } | |
| 39 }); | |
| 40 } | |
| 41 | |
| 42 // anon-enum constants for _layout_helper. | |
| 43 public static int LH_INSTANCE_SLOW_PATH_BIT; | |
| 44 public static int LH_LOG2_ELEMENT_SIZE_SHIFT; | |
| 45 public static int LH_ELEMENT_TYPE_SHIFT; | |
| 46 public static int LH_HEADER_SIZE_SHIFT; | |
| 47 public static int LH_ARRAY_TAG_SHIFT; | |
| 48 public static int LH_ARRAY_TAG_TYPE_VALUE; | |
| 49 public static int LH_ARRAY_TAG_OBJ_VALUE; | |
| 50 | |
| 51 private static synchronized void initialize(TypeDataBase db) throws WrongTypeException { | |
| 52 Type type = db.lookupType("Klass"); | |
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53 javaMirror = new OopField(type.getOopField("_java_mirror"), 0); |
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54 superField = new MetadataField(type.getAddressField("_super"), 0); |
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55 layoutHelper = new IntField(type.getJIntField("_layout_helper"), 0); |
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56 name = type.getAddressField("_name"); |
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57 accessFlags = new CIntField(type.getCIntegerField("_access_flags"), 0); |
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58 subklass = new MetadataField(type.getAddressField("_subklass"), 0); |
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59 nextSibling = new MetadataField(type.getAddressField("_next_sibling"), 0); |
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60 allocCount = new CIntField(type.getCIntegerField("_alloc_count"), 0); |
| 0 | 61 |
| 62 LH_INSTANCE_SLOW_PATH_BIT = db.lookupIntConstant("Klass::_lh_instance_slow_path_bit").intValue(); | |
| 63 LH_LOG2_ELEMENT_SIZE_SHIFT = db.lookupIntConstant("Klass::_lh_log2_element_size_shift").intValue(); | |
| 64 LH_ELEMENT_TYPE_SHIFT = db.lookupIntConstant("Klass::_lh_element_type_shift").intValue(); | |
| 65 LH_HEADER_SIZE_SHIFT = db.lookupIntConstant("Klass::_lh_header_size_shift").intValue(); | |
| 66 LH_ARRAY_TAG_SHIFT = db.lookupIntConstant("Klass::_lh_array_tag_shift").intValue(); | |
| 67 LH_ARRAY_TAG_TYPE_VALUE = db.lookupIntConstant("Klass::_lh_array_tag_type_value").intValue(); | |
| 68 LH_ARRAY_TAG_OBJ_VALUE = db.lookupIntConstant("Klass::_lh_array_tag_obj_value").intValue(); | |
| 69 } | |
| 70 | |
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71 public Klass(Address addr) { |
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72 super(addr); |
| 0 | 73 } |
| 74 | |
| 75 // jvmdi support - see also class_status in VM code | |
| 76 public int getClassStatus() { | |
| 77 return 0; // overridden in derived classes | |
| 78 } | |
| 79 | |
| 80 public boolean isKlass() { return true; } | |
| 81 | |
| 82 // Fields | |
| 83 private static OopField javaMirror; | |
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84 private static MetadataField superField; |
| 0 | 85 private static IntField layoutHelper; |
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86 private static AddressField name; |
| 0 | 87 private static CIntField accessFlags; |
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88 private static MetadataField subklass; |
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89 private static MetadataField nextSibling; |
| 0 | 90 private static CIntField allocCount; |
| 91 | |
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92 private Address getValue(AddressField field) { |
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93 return addr.getAddressAt(field.getOffset()); |
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94 } |
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95 |
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96 protected Symbol getSymbol(AddressField field) { |
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97 return Symbol.create(addr.getAddressAt(field.getOffset())); |
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98 } |
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99 |
| 0 | 100 // Accessors for declared fields |
| 101 public Instance getJavaMirror() { return (Instance) javaMirror.getValue(this); } | |
| 102 public Klass getSuper() { return (Klass) superField.getValue(this); } | |
| 103 public Klass getJavaSuper() { return null; } | |
| 104 public int getLayoutHelper() { return (int) layoutHelper.getValue(this); } | |
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105 public Symbol getName() { return getSymbol(name); } |
| 0 | 106 public long getAccessFlags() { return accessFlags.getValue(this); } |
| 107 // Convenience routine | |
| 108 public AccessFlags getAccessFlagsObj(){ return new AccessFlags(getAccessFlags()); } | |
| 109 public Klass getSubklassKlass() { return (Klass) subklass.getValue(this); } | |
| 110 public Klass getNextSiblingKlass() { return (Klass) nextSibling.getValue(this); } | |
| 111 public long getAllocCount() { return allocCount.getValue(this); } | |
| 112 | |
| 113 // computed access flags - takes care of inner classes etc. | |
| 114 // This is closer to actual source level than getAccessFlags() etc. | |
| 115 public long computeModifierFlags() { | |
| 116 return 0L; // Unless overridden, modifier_flags is 0. | |
| 117 } | |
| 118 | |
| 119 // same as JVM_GetClassModifiers | |
| 120 public final long getClassModifiers() { | |
| 121 // unlike the VM counterpart we never have to deal with primitive type, | |
| 122 // because we operator on Klass and not an instance of java.lang.Class. | |
| 123 long flags = computeModifierFlags(); | |
| 124 if (isSuper()) { | |
| 125 flags |= JVM_ACC_SUPER; | |
| 126 } | |
| 127 return flags; | |
| 128 } | |
| 129 | |
| 130 // subclass check | |
| 131 public boolean isSubclassOf(Klass k) { | |
| 132 if (k != null) { | |
| 133 Klass t = this; | |
| 134 // Run up the super chain and check | |
| 135 while (t != null) { | |
| 136 if (t.equals(k)) return true; | |
| 137 t = t.getSuper(); | |
| 138 } | |
| 139 } | |
| 140 return false; | |
| 141 } | |
| 142 | |
| 143 // subtype check | |
| 144 public boolean isSubtypeOf(Klass k) { | |
| 145 return computeSubtypeOf(k); | |
| 146 } | |
| 147 | |
| 148 boolean computeSubtypeOf(Klass k) { | |
| 149 return isSubclassOf(k); | |
| 150 } | |
| 151 | |
| 152 // Find LCA (Least Common Ancester) in class heirarchy | |
| 153 public Klass lca( Klass k2 ) { | |
| 154 Klass k1 = this; | |
| 155 while ( true ) { | |
| 156 if ( k1.isSubtypeOf(k2) ) return k2; | |
| 157 if ( k2.isSubtypeOf(k1) ) return k1; | |
| 158 k1 = k1.getSuper(); | |
| 159 k2 = k2.getSuper(); | |
| 160 } | |
| 161 } | |
| 162 | |
| 163 public void printValueOn(PrintStream tty) { | |
| 164 tty.print("Klass"); | |
| 165 } | |
| 166 | |
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167 public void iterateFields(MetadataVisitor visitor) { |
| 0 | 168 visitor.doOop(javaMirror, true); |
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169 visitor.doMetadata(superField, true); |
| 0 | 170 visitor.doInt(layoutHelper, true); |
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171 // visitor.doOop(name, true); |
| 0 | 172 visitor.doCInt(accessFlags, true); |
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173 visitor.doMetadata(subklass, true); |
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174 visitor.doMetadata(nextSibling, true); |
| 0 | 175 visitor.doCInt(allocCount, true); |
| 176 } | |
| 177 | |
| 178 public long getObjectSize() { | |
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179 throw new RuntimeException("should not reach here"); |
| 0 | 180 } |
| 181 | |
| 182 /** Array class with specific rank */ | |
| 183 public Klass arrayKlass(int rank) { return arrayKlassImpl(false, rank); } | |
| 184 /** Array class with this klass as element type */ | |
| 185 public Klass arrayKlass() { return arrayKlassImpl(false); } | |
| 186 /** These will return null instead of allocating on the heap */ | |
| 187 public Klass arrayKlassOrNull(int rank) { return arrayKlassImpl(true, rank); } | |
| 188 public Klass arrayKlassOrNull() { return arrayKlassImpl(true); } | |
| 189 | |
| 190 public Klass arrayKlassImpl(boolean orNull, int rank) { | |
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191 throw new RuntimeException("array_klass should be dispatched to InstanceKlass, ObjArrayKlass or TypeArrayKlass"); |
| 0 | 192 } |
| 193 | |
| 194 public Klass arrayKlassImpl(boolean orNull) { | |
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195 throw new RuntimeException("array_klass should be dispatched to InstanceKlass, ObjArrayKlass or TypeArrayKlass"); |
| 0 | 196 } |
| 197 | |
| 198 // This returns the name in the form java/lang/String which isn't really a signature | |
| 199 // The subclasses override this to produce the correct form, eg | |
| 200 // Ljava/lang/String; For ArrayKlasses getName itself is the signature. | |
| 201 public String signature() { return getName().asString(); } | |
| 202 | |
| 203 // Convenience routines | |
| 204 public boolean isPublic() { return getAccessFlagsObj().isPublic(); } | |
| 205 public boolean isFinal() { return getAccessFlagsObj().isFinal(); } | |
| 206 public boolean isInterface() { return getAccessFlagsObj().isInterface(); } | |
| 207 public boolean isAbstract() { return getAccessFlagsObj().isAbstract(); } | |
| 208 public boolean isSuper() { return getAccessFlagsObj().isSuper(); } | |
| 209 public boolean isSynthetic() { return getAccessFlagsObj().isSynthetic(); } | |
| 210 public boolean hasFinalizer() { return getAccessFlagsObj().hasFinalizer(); } | |
| 211 public boolean isCloneable() { return getAccessFlagsObj().isCloneable(); } | |
| 212 public boolean hasVanillaConstructor() { return getAccessFlagsObj().hasVanillaConstructor(); } | |
| 213 public boolean hasMirandaMethods () { return getAccessFlagsObj().hasMirandaMethods(); } | |
| 214 } |