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comparison agent/src/share/classes/sun/jvm/hotspot/runtime/VM.java @ 6725:da91efe96a93

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6964458: Reimplement class meta-data storage to use native memory Summary: Remove PermGen, allocate meta-data in metaspace linked to class loaders, rewrite GC walking, rewrite and rename metadata to be C++ classes Reviewed-by: jmasa, stefank, never, coleenp, kvn, brutisso, mgerdin, dholmes, jrose, twisti, roland Contributed-by: jmasa <jon.masamitsu@oracle.com>, stefank <stefan.karlsson@oracle.com>, mgerdin <mikael.gerdin@oracle.com>, never <tom.rodriguez@oracle.com>
author coleenp
date Sat, 01 Sep 2012 13:25:18 -0400
parents a9fed06c01d2
children 5a98bf7d847b
comparison
equal deleted inserted replaced
6724:36d1d483d5d6 6725:da91efe96a93
1 /* 1 /*
2 * Copyright (c) 2000, 2011, Oracle and/or its affiliates. All rights reserved. 2 * Copyright (c) 2000, 2012, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 * 4 *
5 * This code is free software; you can redistribute it and/or modify it 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 6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation. 7 * published by the Free Software Foundation.
95 /** Flag indicating whether invokedynamic support is on */ 95 /** Flag indicating whether invokedynamic support is on */
96 private boolean enableInvokeDynamic; 96 private boolean enableInvokeDynamic;
97 /** alignment constants */ 97 /** alignment constants */
98 private boolean isLP64; 98 private boolean isLP64;
99 private int bytesPerLong; 99 private int bytesPerLong;
100 private int bytesPerWord;
100 private int objectAlignmentInBytes; 101 private int objectAlignmentInBytes;
101 private int minObjAlignmentInBytes; 102 private int minObjAlignmentInBytes;
102 private int logMinObjAlignmentInBytes; 103 private int logMinObjAlignmentInBytes;
103 private int heapWordSize; 104 private int heapWordSize;
104 private int heapOopSize; 105 private int heapOopSize;
126 private static Type intxType; 127 private static Type intxType;
127 private static Type uintxType; 128 private static Type uintxType;
128 private static CIntegerType boolType; 129 private static CIntegerType boolType;
129 private Boolean sharingEnabled; 130 private Boolean sharingEnabled;
130 private Boolean compressedOopsEnabled; 131 private Boolean compressedOopsEnabled;
132 private Boolean compressedHeadersEnabled;
131 133
132 // command line flags supplied to VM - see struct Flag in globals.hpp 134 // command line flags supplied to VM - see struct Flag in globals.hpp
133 public static final class Flag { 135 public static final class Flag {
134 private String type; 136 private String type;
135 private String name; 137 private String name;
301 invalidOSREntryBCI = db.lookupIntConstant("InvalidOSREntryBci").intValue(); 303 invalidOSREntryBCI = db.lookupIntConstant("InvalidOSREntryBci").intValue();
302 304
303 // We infer the presence of C1 or C2 from a couple of fields we 305 // We infer the presence of C1 or C2 from a couple of fields we
304 // already have present in the type database 306 // already have present in the type database
305 { 307 {
306 Type type = db.lookupType("methodOopDesc"); 308 Type type = db.lookupType("Method");
307 if (type.getField("_from_compiled_entry", false, false) == null) { 309 if (type.getField("_from_compiled_entry", false, false) == null) {
308 // Neither C1 nor C2 is present 310 // Neither C1 nor C2 is present
309 usingClientCompiler = false; 311 usingClientCompiler = false;
310 usingServerCompiler = false; 312 usingServerCompiler = false;
311 } else { 313 } else {
323 325
324 if (debugger != null) { 326 if (debugger != null) {
325 isLP64 = debugger.getMachineDescription().isLP64(); 327 isLP64 = debugger.getMachineDescription().isLP64();
326 } 328 }
327 bytesPerLong = db.lookupIntConstant("BytesPerLong").intValue(); 329 bytesPerLong = db.lookupIntConstant("BytesPerLong").intValue();
330 bytesPerWord = db.lookupIntConstant("BytesPerWord").intValue();
328 heapWordSize = db.lookupIntConstant("HeapWordSize").intValue(); 331 heapWordSize = db.lookupIntConstant("HeapWordSize").intValue();
329 oopSize = db.lookupIntConstant("oopSize").intValue(); 332 oopSize = db.lookupIntConstant("oopSize").intValue();
330 333
331 intxType = db.lookupType("intx"); 334 intxType = db.lookupType("intx");
332 uintxType = db.lookupType("uintx"); 335 uintxType = db.lookupType("uintx");
507 /** Get bytes-per-long == long/double natural alignment. */ 510 /** Get bytes-per-long == long/double natural alignment. */
508 public int getBytesPerLong() { 511 public int getBytesPerLong() {
509 return bytesPerLong; 512 return bytesPerLong;
510 } 513 }
511 514
515 public int getBytesPerWord() {
516 return bytesPerWord;
517 }
518
512 /** Get minimum object alignment in bytes. */ 519 /** Get minimum object alignment in bytes. */
513 public int getMinObjAlignmentInBytes() { 520 public int getMinObjAlignmentInBytes() {
514 return minObjAlignmentInBytes; 521 return minObjAlignmentInBytes;
515 } 522 }
516 public int getLogMinObjAlignmentInBytes() { 523 public int getLogMinObjAlignmentInBytes() {
768 Flag flag = getCommandLineFlag("UseCompressedOops"); 775 Flag flag = getCommandLineFlag("UseCompressedOops");
769 compressedOopsEnabled = (flag == null) ? Boolean.FALSE: 776 compressedOopsEnabled = (flag == null) ? Boolean.FALSE:
770 (flag.getBool()? Boolean.TRUE: Boolean.FALSE); 777 (flag.getBool()? Boolean.TRUE: Boolean.FALSE);
771 } 778 }
772 return compressedOopsEnabled.booleanValue(); 779 return compressedOopsEnabled.booleanValue();
780 }
781
782 public boolean isCompressedHeadersEnabled() {
783 if (compressedHeadersEnabled == null) {
784 Flag flag = getCommandLineFlag("UseCompressedHeaders");
785 compressedHeadersEnabled = (flag == null) ? Boolean.FALSE:
786 (flag.getBool()? Boolean.TRUE: Boolean.FALSE);
787 }
788 return compressedHeadersEnabled.booleanValue();
773 } 789 }
774 790
775 public int getObjectAlignmentInBytes() { 791 public int getObjectAlignmentInBytes() {
776 if (objectAlignmentInBytes == 0) { 792 if (objectAlignmentInBytes == 0) {
777 Flag flag = getCommandLineFlag("ObjectAlignmentInBytes"); 793 Flag flag = getCommandLineFlag("ObjectAlignmentInBytes");