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comparison agent/src/share/classes/sun/jvm/hotspot/interpreter/BytecodeLoadConstant.java @ 2177:3582bf76420e

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6990754: Use native memory and reference counting to implement SymbolTable Summary: move symbols from permgen into C heap and reference count them Reviewed-by: never, acorn, jmasa, stefank
author coleenp
date Thu, 27 Jan 2011 16:11:27 -0800
parents 3b2dea75431e
children 1d1603768966
comparison
equal deleted inserted replaced
2176:27e4ea99855d 2177:3582bf76420e
110 ConstantTag ctag = method().getConstants().getTagAt(index()); 110 ConstantTag ctag = method().getConstants().getTagAt(index());
111 return ctag.isKlass() || ctag.isUnresolvedKlass(); 111 return ctag.isKlass() || ctag.isUnresolvedKlass();
112 } 112 }
113 113
114 // return Symbol (if unresolved) or Klass (if resolved) 114 // return Symbol (if unresolved) or Klass (if resolved)
115 public Oop getKlass() { 115 public Object getKlass() {
116 if (Assert.ASSERTS_ENABLED) { 116 if (Assert.ASSERTS_ENABLED) {
117 Assert.that(isKlassConstant(), "not a klass literal"); 117 Assert.that(isKlassConstant(), "not a klass literal");
118 } 118 }
119 // tag change from 'unresolved' to 'klass' does not happen atomically. 119 // tag change from 'unresolved' to 'klass' does not happen atomically.
120 // We just look at the object at the corresponding index and 120 // We just look at the object at the corresponding index and
121 // decide based on the oop type. 121 // decide based on the oop type.
122 ConstantPool cpool = method().getConstants(); 122 ConstantPool cpool = method().getConstants();
123 int cpIndex = index(); 123 int cpIndex = index();
124 Oop oop = cpool.getObjAt(cpIndex); 124 ConstantPool.CPSlot oop = cpool.getSlotAt(cpIndex);
125 if (oop.isKlass()) { 125 if (oop.isOop()) {
126 return (Klass) oop; 126 return (Klass) oop.getOop();
127 } else if (oop.isSymbol()) { 127 } else if (oop.isMetaData()) {
128 return (Symbol) oop; 128 return oop.getSymbol();
129 } else { 129 } else {
130 throw new RuntimeException("should not reach here"); 130 throw new RuntimeException("should not reach here");
131 } 131 }
132 } 132 }
133 133
163 return "<double " + Double.toString(cpool.getDoubleAt(cpIndex)) + "D>"; 163 return "<double " + Double.toString(cpool.getDoubleAt(cpIndex)) + "D>";
164 } else if (ctag.isString() || ctag.isUnresolvedString()) { 164 } else if (ctag.isString() || ctag.isUnresolvedString()) {
165 // tag change from 'unresolved' to 'string' does not happen atomically. 165 // tag change from 'unresolved' to 'string' does not happen atomically.
166 // We just look at the object at the corresponding index and 166 // We just look at the object at the corresponding index and
167 // decide based on the oop type. 167 // decide based on the oop type.
168 Oop obj = cpool.getObjAt(cpIndex); 168 ConstantPool.CPSlot obj = cpool.getSlotAt(cpIndex);
169 if (obj.isSymbol()) { 169 if (obj.isMetaData()) {
170 Symbol sym = (Symbol) obj; 170 Symbol sym = obj.getSymbol();
171 return "<String \"" + sym.asString() + "\">"; 171 return "<String \"" + sym.asString() + "\">";
172 } else if (obj.isInstance()) { 172 } else if (obj.isOop()) {
173 return "<String \"" + OopUtilities.stringOopToString(obj) + "\">"; 173 return "<String \"" + OopUtilities.stringOopToString(obj.getOop()) + "\">";
174 } else { 174 } else {
175 throw new RuntimeException("should not reach here"); 175 throw new RuntimeException("should not reach here");
176 } 176 }
177 } else if (ctag.isKlass() || ctag.isUnresolvedKlass()) { 177 } else if (ctag.isKlass() || ctag.isUnresolvedKlass()) {
178 // tag change from 'unresolved' to 'klass' does not happen atomically. 178 // tag change from 'unresolved' to 'klass' does not happen atomically.
179 // We just look at the object at the corresponding index and 179 // We just look at the object at the corresponding index and
180 // decide based on the oop type. 180 // decide based on the oop type.
181 Oop obj = cpool.getObjAt(cpIndex); 181 ConstantPool.CPSlot obj = cpool.getSlotAt(cpIndex);
182 if (obj.isKlass()) { 182 if (obj.isOop()) {
183 Klass k = (Klass) obj; 183 Klass k = (Klass) obj.getOop();
184 return "<Class " + k.getName().asString() + "@" + k.getHandle() + ">"; 184 return "<Class " + k.getName().asString() + "@" + k.getHandle() + ">";
185 } else if (obj.isSymbol()) { 185 } else if (obj.isMetaData()) {
186 Symbol sym = (Symbol) obj; 186 Symbol sym = obj.getSymbol();
187 return "<Class " + sym.asString() + ">"; 187 return "<Class " + sym.asString() + ">";
188 } else { 188 } else {
189 throw new RuntimeException("should not reach here"); 189 throw new RuntimeException("should not reach here");
190 } 190 }
191 } else if (ctag.isMethodHandle()) { 191 } else if (ctag.isMethodHandle()) {
192 Oop x = getCachedConstant(); 192 Oop x = getCachedConstant();