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comparison agent/src/os/linux/ps_core.c @ 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 29ee40a082d3
children 255c0a4cb4eb
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6724:36d1d483d5d6 6725:da91efe96a93
1 /* 1 /*
2 * Copyright (c) 2003, 2010, Oracle and/or its affiliates. All rights reserved. 2 * Copyright (c) 2003, 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.
207 207
208 // FileMapHeader describes the shared space data in the file to be 208 // FileMapHeader describes the shared space data in the file to be
209 // mapped. This structure gets written to a file. It is not a class, 209 // mapped. This structure gets written to a file. It is not a class,
210 // so that the compilers don't add any compiler-private data to it. 210 // so that the compilers don't add any compiler-private data to it.
211 211
212 // Refer to CompactingPermGenGen::n_regions in compactingPermGenGen.hpp
213 #define NUM_SHARED_MAPS 4 212 #define NUM_SHARED_MAPS 4
214 213
215 // Refer to FileMapInfo::_current_version in filemap.hpp 214 // Refer to FileMapInfo::_current_version in filemap.hpp
216 #define CURRENT_ARCHIVE_VERSION 1 215 #define CURRENT_ARCHIVE_VERSION 1
217 216
231 // Hotspot on Linux we assume the corresponding C type is char but 230 // Hotspot on Linux we assume the corresponding C type is char but
232 // licensees on Linux versions may need to adjust the type of these fields. 231 // licensees on Linux versions may need to adjust the type of these fields.
233 char _read_only; // read only space? 232 char _read_only; // read only space?
234 char _allow_exec; // executable code in space? 233 char _allow_exec; // executable code in space?
235 234
236 } _space[NUM_SHARED_MAPS]; // was _space[CompactingPermGenGen::n_regions]; 235 } _space[NUM_SHARED_MAPS];
237 236
238 // Ignore the rest of the FileMapHeader. We don't need those fields here. 237 // Ignore the rest of the FileMapHeader. We don't need those fields here.
239 }; 238 };
240 239
241 static bool read_jboolean(struct ps_prochandle* ph, uintptr_t addr, jboolean* pvalue) { 240 static bool read_jboolean(struct ps_prochandle* ph, uintptr_t addr, jboolean* pvalue) {