Fri, 10 Jul 2009 11:10:00 -0700
6857194: Add hotspot perf counters to aid class loading performance measurement
Summary: Add new jvmstat counters to measure detailed class loading time
Reviewed-by: acorn, kamg
duke@435 | 1 | /* |
duke@435 | 2 | * Copyright 1999-2007 Sun Microsystems, Inc. All Rights Reserved. |
duke@435 | 3 | * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
duke@435 | 4 | * |
duke@435 | 5 | * This code is free software; you can redistribute it and/or modify it |
duke@435 | 6 | * under the terms of the GNU General Public License version 2 only, as |
duke@435 | 7 | * published by the Free Software Foundation. |
duke@435 | 8 | * |
duke@435 | 9 | * This code is distributed in the hope that it will be useful, but WITHOUT |
duke@435 | 10 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
duke@435 | 11 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
duke@435 | 12 | * version 2 for more details (a copy is included in the LICENSE file that |
duke@435 | 13 | * accompanied this code). |
duke@435 | 14 | * |
duke@435 | 15 | * You should have received a copy of the GNU General Public License version |
duke@435 | 16 | * 2 along with this work; if not, write to the Free Software Foundation, |
duke@435 | 17 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
duke@435 | 18 | * |
duke@435 | 19 | * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, |
duke@435 | 20 | * CA 95054 USA or visit www.sun.com if you need additional information or |
duke@435 | 21 | * have any questions. |
duke@435 | 22 | * |
duke@435 | 23 | */ |
duke@435 | 24 | |
duke@435 | 25 | /////////////////////////////////////////////////////////////// |
duke@435 | 26 | // |
duke@435 | 27 | // class JvmtiUtil |
duke@435 | 28 | // |
duke@435 | 29 | // class for miscellaneous jvmti utility static methods |
duke@435 | 30 | // |
duke@435 | 31 | |
duke@435 | 32 | class JvmtiUtil : AllStatic { |
duke@435 | 33 | |
duke@435 | 34 | static ResourceArea* _single_threaded_resource_area; |
duke@435 | 35 | |
duke@435 | 36 | static const char* _error_names[]; |
duke@435 | 37 | static const bool _event_threaded[]; |
duke@435 | 38 | |
duke@435 | 39 | public: |
duke@435 | 40 | |
duke@435 | 41 | static ResourceArea* single_threaded_resource_area(); |
duke@435 | 42 | |
duke@435 | 43 | static const char* error_name(int num) { return _error_names[num]; } // To Do: add range checking |
duke@435 | 44 | |
duke@435 | 45 | static const bool has_event_capability(jvmtiEvent event_type, const jvmtiCapabilities* capabilities_ptr); |
duke@435 | 46 | |
duke@435 | 47 | static const bool event_threaded(int num) { |
duke@435 | 48 | if (num >= JVMTI_MIN_EVENT_TYPE_VAL && num <= JVMTI_MAX_EVENT_TYPE_VAL) { |
duke@435 | 49 | return _event_threaded[num]; |
duke@435 | 50 | } |
duke@435 | 51 | if (num >= EXT_MIN_EVENT_TYPE_VAL && num <= EXT_MAX_EVENT_TYPE_VAL) { |
duke@435 | 52 | return false; |
duke@435 | 53 | } |
duke@435 | 54 | ShouldNotReachHere(); |
duke@435 | 55 | return false; |
duke@435 | 56 | } |
duke@435 | 57 | }; |
duke@435 | 58 | |
duke@435 | 59 | |
duke@435 | 60 | /////////////////////////////////////////////////////////////// |
duke@435 | 61 | // |
duke@435 | 62 | // class SafeResourceMark |
duke@435 | 63 | // |
duke@435 | 64 | // ResourceMarks that work before threads exist |
duke@435 | 65 | // |
duke@435 | 66 | |
duke@435 | 67 | class SafeResourceMark : public ResourceMark { |
duke@435 | 68 | |
duke@435 | 69 | ResourceArea* safe_resource_area() { |
duke@435 | 70 | Thread* thread; |
duke@435 | 71 | |
duke@435 | 72 | if (Threads::number_of_threads() == 0) { |
duke@435 | 73 | return JvmtiUtil::single_threaded_resource_area(); |
duke@435 | 74 | } |
duke@435 | 75 | thread = ThreadLocalStorage::thread(); |
duke@435 | 76 | if (thread == NULL) { |
duke@435 | 77 | return JvmtiUtil::single_threaded_resource_area(); |
duke@435 | 78 | } |
duke@435 | 79 | return thread->resource_area(); |
duke@435 | 80 | } |
duke@435 | 81 | |
duke@435 | 82 | public: |
duke@435 | 83 | |
duke@435 | 84 | SafeResourceMark() : ResourceMark(safe_resource_area()) {} |
duke@435 | 85 | |
duke@435 | 86 | }; |