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annotate src/share/vm/runtime/dtraceJSDT.hpp @ 1552:c18cbe5936b8

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6941466: Oracle rebranding changes for Hotspot repositories Summary: Change all the Sun copyrights to Oracle copyright Reviewed-by: ohair
author trims
date Thu, 27 May 2010 19:08:38 -0700
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1 /*
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2 * Copyright (c) 1997, 2008, 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
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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
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11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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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 class RegisteredProbes;
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26 typedef jlong OpaqueProbes;
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27
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28 class DTraceJSDT : AllStatic {
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29 private:
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30
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31 static int pd_activate(void* moduleBaseAddress, jstring module,
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32 jint providers_count, JVM_DTraceProvider* providers);
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33 static void pd_dispose(int handle);
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34 static jboolean pd_is_supported();
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35
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36 public:
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37
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38 static OpaqueProbes activate(
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39 jint version, jstring module_name, jint providers_count,
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40 JVM_DTraceProvider* providers, TRAPS);
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41 static jboolean is_probe_enabled(jmethodID method);
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42 static void dispose(OpaqueProbes handle);
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43 static jboolean is_supported();
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44 };
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45
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46 class RegisteredProbes : public CHeapObj {
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47 private:
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48 nmethod** _nmethods; // all the probe methods
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49 size_t _count; // number of probe methods
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50 int _helper_handle; // DTrace-assigned identifier
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51
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52 public:
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53 RegisteredProbes(size_t count) {
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54 _count = count;
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55 _nmethods = NEW_C_HEAP_ARRAY(nmethod*, count);
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56 }
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57
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58 ~RegisteredProbes() {
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59 for (size_t i = 0; i < _count; ++i) {
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60 // Let the sweeper reclaim it
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61 _nmethods[i]->make_not_entrant();
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62 _nmethods[i]->method()->clear_code();
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63 }
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64 FREE_C_HEAP_ARRAY(nmethod*, _nmethods);
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65 _nmethods = NULL;
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66 _count = 0;
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67 }
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68
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69 static RegisteredProbes* toRegisteredProbes(OpaqueProbes p) {
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70 return (RegisteredProbes*)(intptr_t)p;
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71 }
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72
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73 static OpaqueProbes toOpaqueProbes(RegisteredProbes* p) {
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74 return (OpaqueProbes)(intptr_t)p;
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75 }
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76
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77 void set_helper_handle(int handle) { _helper_handle = handle; }
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78 int helper_handle() const { return _helper_handle; }
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79
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80 nmethod* nmethod_at(size_t i) {
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81 assert(i >= 0 && i < _count, "bad nmethod index");
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82 return _nmethods[i];
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83 }
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84
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85 void nmethod_at_put(size_t i, nmethod* nm) {
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86 assert(i >= 0 && i < _count, "bad nmethod index");
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87 _nmethods[i] = nm;
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88 }
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89 };