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annotate src/os/linux/vm/decoder_linux.cpp @ 5318:b5cd7bc05695

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Method entry counters: Enable the flag to collect an execution profile of compiled methods and their callers. This allows to, e.g., detect methods that should be inlined because they are called frequently.
author Christian Wimmer <Christian.Wimmer@Oracle.com>
date Fri, 27 Apr 2012 12:56:39 -0700
parents d7e3846464d0
children b9a9ed0f8eeb
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1 /*
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2 * Copyright (c) 1997, 2010, Oracle and/or its affiliates. All rights reserved.
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3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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4 *
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5 * This code is free software; you can redistribute it and/or modify it
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6 * under the terms of the GNU General Public License version 2 only, as
2d4762ec74af 7003748: Decode C stack frames when symbols are presented (PhoneHome project)
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7 * published by the Free Software Foundation.
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8 *
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9 * This code is distributed in the hope that it will be useful, but WITHOUT
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10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
2d4762ec74af 7003748: Decode C stack frames when symbols are presented (PhoneHome project)
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11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
2d4762ec74af 7003748: Decode C stack frames when symbols are presented (PhoneHome project)
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12 * version 2 for more details (a copy is included in the LICENSE file that
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13 * accompanied this code).
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14 *
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15 * You should have received a copy of the GNU General Public License version
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16 * 2 along with this work; if not, write to the Free Software Foundation,
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17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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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.
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22 *
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23 */
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24
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25 #include "prims/jvm.h"
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26 #include "utilities/decoder_elf.hpp"
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28 #include <cxxabi.h>
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30 bool ElfDecoder::demangle(const char* symbol, char *buf, int buflen) {
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31 int status;
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32 char* result;
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33 size_t size = (size_t)buflen;
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35 // Don't pass buf to __cxa_demangle. In case of the 'buf' is too small,
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36 // __cxa_demangle will call system "realloc" for additional memory, which
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37 // may use different malloc/realloc mechanism that allocates 'buf'.
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38 if ((result = abi::__cxa_demangle(symbol, NULL, NULL, &status)) != NULL) {
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39 jio_snprintf(buf, buflen, "%s", result);
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40 // call c library's free
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41 ::free(result);
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42 return true;
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43 }
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44 return false;
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45 }
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