Mercurial > hg > truffle
annotate agent/src/share/classes/sun/jvm/hotspot/oops/ConstMethod.java @ 8031:927a311d00f9
8007320: NPG: move method annotations
Summary: allocate method annotations and attach to ConstMethod if present
Reviewed-by: dcubed, jiangli, sspitsyn, iklam
| author | coleenp |
|---|---|
| date | Mon, 11 Feb 2013 14:06:22 -0500 |
| parents | fd74228fd5ca |
| children | d2db09f281ca |
| rev | line source |
|---|---|
| 0 | 1 /* |
| 8031 | 2 * Copyright (c) 2003, 2013, 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.code.*; | |
| 30 import sun.jvm.hotspot.debugger.*; | |
| 31 import sun.jvm.hotspot.interpreter.*; | |
| 32 import sun.jvm.hotspot.memory.*; | |
| 33 import sun.jvm.hotspot.runtime.*; | |
| 34 import sun.jvm.hotspot.types.*; | |
| 35 import sun.jvm.hotspot.utilities.*; | |
| 36 | |
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37 public class ConstMethod extends VMObject { |
| 0 | 38 static { |
| 39 VM.registerVMInitializedObserver(new Observer() { | |
| 40 public void update(Observable o, Object data) { | |
| 41 initialize(VM.getVM().getTypeDataBase()); | |
| 42 } | |
| 43 }); | |
| 44 } | |
| 45 | |
| 46 // anon-enum constants for _flags. | |
| 47 private static int HAS_LINENUMBER_TABLE; | |
| 48 private static int HAS_CHECKED_EXCEPTIONS; | |
| 49 private static int HAS_LOCALVARIABLE_TABLE; | |
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50 private static int HAS_EXCEPTION_TABLE; |
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51 private static int HAS_GENERIC_SIGNATURE; |
| 8031 | 52 private static int HAS_METHOD_ANNOTATIONS; |
| 53 private static int HAS_PARAMETER_ANNOTATIONS; | |
| 54 private static int HAS_DEFAULT_ANNOTATIONS; | |
| 55 private static int HAS_TYPE_ANNOTATIONS; | |
| 56 | |
| 57 private static final int sizeofShort = 2; | |
| 0 | 58 |
| 59 private static synchronized void initialize(TypeDataBase db) throws WrongTypeException { | |
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60 Type type = db.lookupType("ConstMethod"); |
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61 constants = new MetadataField(type.getAddressField("_constants"), 0); |
| 0 | 62 constMethodSize = new CIntField(type.getCIntegerField("_constMethod_size"), 0); |
| 8031 | 63 flags = new CIntField(type.getCIntegerField("_flags"), 0); |
| 0 | 64 |
| 65 // enum constants for flags | |
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66 HAS_LINENUMBER_TABLE = db.lookupIntConstant("ConstMethod::_has_linenumber_table").intValue(); |
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67 HAS_CHECKED_EXCEPTIONS = db.lookupIntConstant("ConstMethod::_has_checked_exceptions").intValue(); |
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68 HAS_LOCALVARIABLE_TABLE = db.lookupIntConstant("ConstMethod::_has_localvariable_table").intValue(); |
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69 HAS_EXCEPTION_TABLE = db.lookupIntConstant("ConstMethod::_has_exception_table").intValue(); |
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70 HAS_GENERIC_SIGNATURE = db.lookupIntConstant("ConstMethod::_has_generic_signature").intValue(); |
| 8031 | 71 HAS_METHOD_ANNOTATIONS = db.lookupIntConstant("ConstMethod::_has_method_annotations").intValue(); |
| 72 HAS_PARAMETER_ANNOTATIONS = db.lookupIntConstant("ConstMethod::_has_parameter_annotations").intValue(); | |
| 73 HAS_DEFAULT_ANNOTATIONS = db.lookupIntConstant("ConstMethod::_has_default_annotations").intValue(); | |
| 74 HAS_TYPE_ANNOTATIONS = db.lookupIntConstant("ConstMethod::_has_type_annotations").intValue(); | |
| 0 | 75 |
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76 // Size of Java bytecodes allocated immediately after ConstMethod*. |
| 0 | 77 codeSize = new CIntField(type.getCIntegerField("_code_size"), 0); |
| 78 nameIndex = new CIntField(type.getCIntegerField("_name_index"), 0); | |
| 79 signatureIndex = new CIntField(type.getCIntegerField("_signature_index"), 0); | |
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80 idnum = new CIntField(type.getCIntegerField("_method_idnum"), 0); |
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81 maxStack = new CIntField(type.getCIntegerField("_max_stack"), 0); |
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82 maxLocals = new CIntField(type.getCIntegerField("_max_locals"), 0); |
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83 sizeOfParameters = new CIntField(type.getCIntegerField("_size_of_parameters"), 0); |
| 0 | 84 |
| 85 // start of byte code | |
| 86 bytecodeOffset = type.getSize(); | |
| 87 | |
| 88 type = db.lookupType("CheckedExceptionElement"); | |
| 89 checkedExceptionElementSize = type.getSize(); | |
| 90 | |
| 91 type = db.lookupType("LocalVariableTableElement"); | |
| 92 localVariableTableElementSize = type.getSize(); | |
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93 |
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94 type = db.lookupType("ExceptionTableElement"); |
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95 exceptionTableElementSize = type.getSize(); |
| 0 | 96 } |
| 97 | |
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98 public ConstMethod(Address addr) { |
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99 super(addr); |
| 0 | 100 } |
| 101 | |
| 102 // Fields | |
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103 private static MetadataField constants; |
| 0 | 104 private static CIntField constMethodSize; |
| 8031 | 105 private static CIntField flags; |
| 0 | 106 private static CIntField codeSize; |
| 107 private static CIntField nameIndex; | |
| 108 private static CIntField signatureIndex; | |
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109 private static CIntField idnum; |
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110 private static CIntField maxStack; |
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111 private static CIntField maxLocals; |
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112 private static CIntField sizeOfParameters; |
| 0 | 113 |
| 114 // start of bytecode | |
| 115 private static long bytecodeOffset; | |
| 116 | |
| 117 private static long checkedExceptionElementSize; | |
| 118 private static long localVariableTableElementSize; | |
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119 private static long exceptionTableElementSize; |
| 0 | 120 |
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121 public Method getMethod() { |
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122 InstanceKlass ik = (InstanceKlass)getConstants().getPoolHolder(); |
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123 MethodArray methods = ik.getMethods(); |
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124 return methods.at((int)getIdNum()); |
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125 } |
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126 |
| 0 | 127 // Accessors for declared fields |
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128 public ConstantPool getConstants() { |
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129 return (ConstantPool) constants.getValue(this); |
| 0 | 130 } |
| 131 | |
| 132 public long getConstMethodSize() { | |
| 133 return constMethodSize.getValue(this); | |
| 134 } | |
| 135 | |
| 8031 | 136 public long getFlags() { |
| 0 | 137 return flags.getValue(this); |
| 138 } | |
| 139 | |
| 140 public long getCodeSize() { | |
| 141 return codeSize.getValue(this); | |
| 142 } | |
| 143 | |
| 144 public long getNameIndex() { | |
| 145 return nameIndex.getValue(this); | |
| 146 } | |
| 147 | |
| 148 public long getSignatureIndex() { | |
| 149 return signatureIndex.getValue(this); | |
| 150 } | |
| 151 | |
| 152 public long getGenericSignatureIndex() { | |
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153 if (hasGenericSignature()) { |
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154 return getAddress().getCIntegerAt(offsetOfGenericSignatureIndex(), 2, true); |
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155 } else { |
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156 return 0; |
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157 } |
| 0 | 158 } |
| 159 | |
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160 public long getIdNum() { |
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161 return idnum.getValue(this); |
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162 } |
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163 |
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164 public long getMaxStack() { |
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165 return maxStack.getValue(this); |
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166 } |
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167 |
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168 public long getMaxLocals() { |
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169 return maxLocals.getValue(this); |
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170 } |
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171 |
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172 public long getSizeOfParameters() { |
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173 return sizeOfParameters.getValue(this); |
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174 } |
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175 |
| 0 | 176 public Symbol getName() { |
| 177 return getMethod().getName(); | |
| 178 } | |
| 179 | |
| 180 public Symbol getSignature() { | |
| 181 return getMethod().getSignature(); | |
| 182 } | |
| 183 | |
| 184 public Symbol getGenericSignature() { | |
| 185 return getMethod().getGenericSignature(); | |
| 186 } | |
| 187 | |
| 188 // bytecode accessors | |
| 189 | |
| 190 /** Get a bytecode or breakpoint at the given bci */ | |
| 191 public int getBytecodeOrBPAt(int bci) { | |
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192 return getAddress().getJByteAt(bytecodeOffset + bci) & 0xFF; |
| 0 | 193 } |
| 194 | |
| 195 public byte getBytecodeByteArg(int bci) { | |
| 196 return (byte) getBytecodeOrBPAt(bci); | |
| 197 } | |
| 198 | |
| 199 /** Fetches a 16-bit big-endian ("Java ordered") value from the | |
| 200 bytecode stream */ | |
| 201 public short getBytecodeShortArg(int bci) { | |
| 202 int hi = getBytecodeOrBPAt(bci); | |
| 203 int lo = getBytecodeOrBPAt(bci + 1); | |
| 204 return (short) ((hi << 8) | lo); | |
| 205 } | |
| 206 | |
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207 /** Fetches a 16-bit native ordered value from the |
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208 bytecode stream */ |
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209 public short getNativeShortArg(int bci) { |
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210 int hi = getBytecodeOrBPAt(bci); |
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211 int lo = getBytecodeOrBPAt(bci + 1); |
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212 if (VM.getVM().isBigEndian()) { |
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213 return (short) ((hi << 8) | lo); |
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214 } else { |
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215 return (short) ((lo << 8) | hi); |
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216 } |
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217 } |
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218 |
| 0 | 219 /** Fetches a 32-bit big-endian ("Java ordered") value from the |
| 220 bytecode stream */ | |
| 221 public int getBytecodeIntArg(int bci) { | |
| 222 int b4 = getBytecodeOrBPAt(bci); | |
| 223 int b3 = getBytecodeOrBPAt(bci + 1); | |
| 224 int b2 = getBytecodeOrBPAt(bci + 2); | |
| 225 int b1 = getBytecodeOrBPAt(bci + 3); | |
| 226 | |
| 227 return (b4 << 24) | (b3 << 16) | (b2 << 8) | b1; | |
| 228 } | |
| 229 | |
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230 /** Fetches a 32-bit native ordered value from the |
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231 bytecode stream */ |
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232 public int getNativeIntArg(int bci) { |
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233 int b4 = getBytecodeOrBPAt(bci); |
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234 int b3 = getBytecodeOrBPAt(bci + 1); |
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235 int b2 = getBytecodeOrBPAt(bci + 2); |
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236 int b1 = getBytecodeOrBPAt(bci + 3); |
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237 |
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238 if (VM.getVM().isBigEndian()) { |
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239 return (b4 << 24) | (b3 << 16) | (b2 << 8) | b1; |
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240 } else { |
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241 return (b1 << 24) | (b2 << 16) | (b3 << 8) | b4; |
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242 } |
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243 } |
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244 |
| 0 | 245 public byte[] getByteCode() { |
| 246 byte[] bc = new byte[ (int) getCodeSize() ]; | |
| 247 for( int i=0; i < bc.length; i++ ) | |
| 248 { | |
| 249 long offs = bytecodeOffset + i; | |
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250 bc[i] = getAddress().getJByteAt( offs ); |
| 0 | 251 } |
| 252 return bc; | |
| 253 } | |
| 254 | |
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255 public long getSize() { |
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256 return getConstMethodSize(); |
| 0 | 257 } |
| 258 | |
| 259 public void printValueOn(PrintStream tty) { | |
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260 tty.print("ConstMethod " + getName().asString() + getSignature().asString() + "@" + getAddress()); |
| 0 | 261 } |
| 262 | |
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263 public void iterateFields(MetadataVisitor visitor) { |
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264 visitor.doMetadata(constants, true); |
| 0 | 265 visitor.doCInt(constMethodSize, true); |
| 8031 | 266 visitor.doCInt(flags, true); |
| 0 | 267 visitor.doCInt(codeSize, true); |
| 268 visitor.doCInt(nameIndex, true); | |
| 269 visitor.doCInt(signatureIndex, true); | |
| 270 visitor.doCInt(codeSize, true); | |
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271 visitor.doCInt(maxStack, true); |
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272 visitor.doCInt(maxLocals, true); |
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273 visitor.doCInt(sizeOfParameters, true); |
| 0 | 274 } |
| 275 | |
| 276 // Accessors | |
| 277 | |
| 278 public boolean hasLineNumberTable() { | |
| 279 return (getFlags() & HAS_LINENUMBER_TABLE) != 0; | |
| 280 } | |
| 281 | |
| 282 public int getLineNumberFromBCI(int bci) { | |
| 283 if (!VM.getVM().isCore()) { | |
| 284 if (bci == DebugInformationRecorder.SYNCHRONIZATION_ENTRY_BCI) bci = 0; | |
| 285 } | |
| 286 | |
| 287 if (isNative()) { | |
| 288 return -1; | |
| 289 } | |
| 290 | |
| 291 if (Assert.ASSERTS_ENABLED) { | |
| 292 Assert.that(bci == 0 || 0 <= bci && bci < getCodeSize(), "illegal bci"); | |
| 293 } | |
| 294 int bestBCI = 0; | |
| 295 int bestLine = -1; | |
| 296 if (hasLineNumberTable()) { | |
| 297 // The line numbers are a short array of 2-tuples [start_pc, line_number]. | |
| 298 // Not necessarily sorted and not necessarily one-to-one. | |
| 299 CompressedLineNumberReadStream stream = | |
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300 new CompressedLineNumberReadStream(getAddress(), (int) offsetOfCompressedLineNumberTable()); |
| 0 | 301 while (stream.readPair()) { |
| 302 if (stream.bci() == bci) { | |
| 303 // perfect match | |
| 304 return stream.line(); | |
| 305 } else { | |
| 306 // update best_bci/line | |
| 307 if (stream.bci() < bci && stream.bci() >= bestBCI) { | |
| 308 bestBCI = stream.bci(); | |
| 309 bestLine = stream.line(); | |
| 310 } | |
| 311 } | |
| 312 } | |
| 313 } | |
| 314 return bestLine; | |
| 315 } | |
| 316 | |
| 317 public LineNumberTableElement[] getLineNumberTable() { | |
| 318 if (Assert.ASSERTS_ENABLED) { | |
| 319 Assert.that(hasLineNumberTable(), | |
| 320 "should only be called if table is present"); | |
| 321 } | |
| 322 int len = getLineNumberTableLength(); | |
| 323 CompressedLineNumberReadStream stream = | |
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324 new CompressedLineNumberReadStream(getAddress(), (int) offsetOfCompressedLineNumberTable()); |
| 0 | 325 LineNumberTableElement[] ret = new LineNumberTableElement[len]; |
| 326 | |
| 327 for (int idx = 0; idx < len; idx++) { | |
| 328 stream.readPair(); | |
| 329 ret[idx] = new LineNumberTableElement(stream.bci(), stream.line()); | |
| 330 } | |
| 331 return ret; | |
| 332 } | |
| 333 | |
| 334 public boolean hasLocalVariableTable() { | |
| 335 return (getFlags() & HAS_LOCALVARIABLE_TABLE) != 0; | |
| 336 } | |
| 337 | |
| 338 public Symbol getLocalVariableName(int bci, int slot) { | |
| 339 return getMethod().getLocalVariableName(bci, slot); | |
| 340 } | |
| 341 | |
| 342 /** Should only be called if table is present */ | |
| 343 public LocalVariableTableElement[] getLocalVariableTable() { | |
| 344 if (Assert.ASSERTS_ENABLED) { | |
| 345 Assert.that(hasLocalVariableTable(), "should only be called if table is present"); | |
| 346 } | |
| 347 LocalVariableTableElement[] ret = new LocalVariableTableElement[getLocalVariableTableLength()]; | |
| 348 long offset = offsetOfLocalVariableTable(); | |
| 349 for (int i = 0; i < ret.length; i++) { | |
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350 ret[i] = new LocalVariableTableElement(getAddress(), offset); |
| 0 | 351 offset += localVariableTableElementSize; |
| 352 } | |
| 353 return ret; | |
| 354 } | |
| 355 | |
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356 public boolean hasExceptionTable() { |
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357 return (getFlags() & HAS_EXCEPTION_TABLE) != 0; |
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358 } |
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359 |
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360 public ExceptionTableElement[] getExceptionTable() { |
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361 if (Assert.ASSERTS_ENABLED) { |
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362 Assert.that(hasExceptionTable(), "should only be called if table is present"); |
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363 } |
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364 ExceptionTableElement[] ret = new ExceptionTableElement[getExceptionTableLength()]; |
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365 long offset = offsetOfExceptionTable(); |
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366 for (int i = 0; i < ret.length; i++) { |
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367 ret[i] = new ExceptionTableElement(getAddress(), offset); |
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368 offset += exceptionTableElementSize; |
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369 } |
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370 return ret; |
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371 } |
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372 |
| 0 | 373 public boolean hasCheckedExceptions() { |
| 374 return (getFlags() & HAS_CHECKED_EXCEPTIONS) != 0; | |
| 375 } | |
| 376 | |
| 377 public CheckedExceptionElement[] getCheckedExceptions() { | |
| 378 if (Assert.ASSERTS_ENABLED) { | |
| 379 Assert.that(hasCheckedExceptions(), "should only be called if table is present"); | |
| 380 } | |
| 381 CheckedExceptionElement[] ret = new CheckedExceptionElement[getCheckedExceptionsLength()]; | |
| 382 long offset = offsetOfCheckedExceptions(); | |
| 383 for (int i = 0; i < ret.length; i++) { | |
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384 ret[i] = new CheckedExceptionElement(getAddress(), offset); |
| 0 | 385 offset += checkedExceptionElementSize; |
| 386 } | |
| 387 return ret; | |
| 388 } | |
| 389 | |
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390 private boolean hasGenericSignature() { |
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391 return (getFlags() & HAS_GENERIC_SIGNATURE) != 0; |
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392 } |
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393 |
| 8031 | 394 private boolean hasMethodAnnotations() { |
| 395 return (getFlags() & HAS_METHOD_ANNOTATIONS) != 0; | |
| 396 } | |
| 397 | |
| 398 private boolean hasParameterAnnotations() { | |
| 399 return (getFlags() & HAS_PARAMETER_ANNOTATIONS) != 0; | |
| 400 } | |
| 401 | |
| 402 private boolean hasDefaultAnnotations() { | |
| 403 return (getFlags() & HAS_DEFAULT_ANNOTATIONS) != 0; | |
| 404 } | |
| 405 | |
| 406 private boolean hasTypeAnnotations() { | |
| 407 return (getFlags() & HAS_TYPE_ANNOTATIONS) != 0; | |
| 408 } | |
| 409 | |
| 0 | 410 |
| 411 //--------------------------------------------------------------------------- | |
| 412 // Internals only below this point | |
| 413 // | |
| 414 | |
| 415 private boolean isNative() { | |
| 416 return getMethod().isNative(); | |
| 417 } | |
| 418 | |
| 419 // Offset of end of code | |
| 420 private long offsetOfCodeEnd() { | |
| 421 return bytecodeOffset + getCodeSize(); | |
| 422 } | |
| 423 | |
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424 // Offset of start of compressed line number table (see method.hpp) |
| 0 | 425 private long offsetOfCompressedLineNumberTable() { |
| 426 return offsetOfCodeEnd() + (isNative() ? 2 * VM.getVM().getAddressSize() : 0); | |
| 427 } | |
| 428 | |
| 8031 | 429 // Offset of last short in Method* before annotations, if present |
| 0 | 430 private long offsetOfLastU2Element() { |
| 8031 | 431 int offset = 0; |
| 432 if (hasMethodAnnotations()) offset++; | |
| 433 if (hasParameterAnnotations()) offset++; | |
| 434 if (hasTypeAnnotations()) offset++; | |
| 435 if (hasDefaultAnnotations()) offset++; | |
| 436 long wordSize = VM.getVM().getObjectHeap().getOopSize(); | |
| 437 return (getSize() * wordSize) - (offset * wordSize) - sizeofShort; | |
| 0 | 438 } |
| 439 | |
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440 // Offset of the generic signature index |
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441 private long offsetOfGenericSignatureIndex() { |
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442 return offsetOfLastU2Element(); |
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443 } |
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444 |
| 0 | 445 private long offsetOfCheckedExceptionsLength() { |
| 8031 | 446 return hasGenericSignature() ? offsetOfLastU2Element() - sizeofShort : |
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447 offsetOfLastU2Element(); |
| 0 | 448 } |
| 449 | |
| 450 private int getCheckedExceptionsLength() { | |
| 451 if (hasCheckedExceptions()) { | |
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452 return (int) getAddress().getCIntegerAt(offsetOfCheckedExceptionsLength(), 2, true); |
| 0 | 453 } else { |
| 454 return 0; | |
| 455 } | |
| 456 } | |
| 457 | |
| 458 // Offset of start of checked exceptions | |
| 459 private long offsetOfCheckedExceptions() { | |
| 460 long offset = offsetOfCheckedExceptionsLength(); | |
| 461 long length = getCheckedExceptionsLength(); | |
| 462 if (Assert.ASSERTS_ENABLED) { | |
| 463 Assert.that(length > 0, "should only be called if table is present"); | |
| 464 } | |
| 465 offset -= length * checkedExceptionElementSize; | |
| 466 return offset; | |
| 467 } | |
| 468 | |
| 469 private int getLineNumberTableLength() { | |
| 470 int len = 0; | |
| 471 if (hasLineNumberTable()) { | |
| 472 CompressedLineNumberReadStream stream = | |
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473 new CompressedLineNumberReadStream(getAddress(), (int) offsetOfCompressedLineNumberTable()); |
| 0 | 474 while (stream.readPair()) { |
| 475 len += 1; | |
| 476 } | |
| 477 } | |
| 478 return len; | |
| 479 } | |
| 480 | |
| 481 private int getLocalVariableTableLength() { | |
| 482 if (hasLocalVariableTable()) { | |
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483 return (int) getAddress().getCIntegerAt(offsetOfLocalVariableTableLength(), 2, true); |
| 0 | 484 } else { |
| 485 return 0; | |
| 486 } | |
| 487 } | |
| 488 | |
| 489 // Offset of local variable table length | |
| 490 private long offsetOfLocalVariableTableLength() { | |
| 491 if (Assert.ASSERTS_ENABLED) { | |
| 492 Assert.that(hasLocalVariableTable(), "should only be called if table is present"); | |
| 493 } | |
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494 |
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495 if (hasExceptionTable()) { |
| 8031 | 496 return offsetOfExceptionTable() - sizeofShort; |
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497 } else if (hasCheckedExceptions()) { |
| 8031 | 498 return offsetOfCheckedExceptions() - sizeofShort; |
| 0 | 499 } else { |
| 8031 | 500 return hasGenericSignature() ? offsetOfLastU2Element() - sizeofShort : |
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501 offsetOfLastU2Element(); |
| 0 | 502 } |
| 503 } | |
| 504 | |
| 505 private long offsetOfLocalVariableTable() { | |
| 506 long offset = offsetOfLocalVariableTableLength(); | |
| 507 long length = getLocalVariableTableLength(); | |
| 508 if (Assert.ASSERTS_ENABLED) { | |
| 509 Assert.that(length > 0, "should only be called if table is present"); | |
| 510 } | |
| 511 offset -= length * localVariableTableElementSize; | |
| 512 return offset; | |
| 513 } | |
| 514 | |
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515 private int getExceptionTableLength() { |
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516 if (hasExceptionTable()) { |
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517 return (int) getAddress().getCIntegerAt(offsetOfExceptionTableLength(), 2, true); |
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518 } else { |
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519 return 0; |
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520 } |
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521 } |
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522 |
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523 private long offsetOfExceptionTableLength() { |
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524 if (Assert.ASSERTS_ENABLED) { |
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525 Assert.that(hasExceptionTable(), "should only be called if table is present"); |
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526 } |
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527 if (hasCheckedExceptions()) { |
| 8031 | 528 return offsetOfCheckedExceptions() - sizeofShort; |
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529 } else { |
| 8031 | 530 return hasGenericSignature() ? offsetOfLastU2Element() - sizeofShort : |
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531 offsetOfLastU2Element(); |
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532 } |
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533 } |
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534 |
|
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535 private long offsetOfExceptionTable() { |
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536 long offset = offsetOfExceptionTableLength(); |
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537 long length = getExceptionTableLength(); |
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538 if (Assert.ASSERTS_ENABLED) { |
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539 Assert.that(length > 0, "should only be called if table is present"); |
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540 } |
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541 offset -= length * exceptionTableElementSize; |
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542 return offset; |
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543 } |
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544 |
| 0 | 545 } |