Fri, 11 Feb 2011 14:15:16 +0100
7018257: jmm_DumpThreads allocates into permgen
Summary: Don't allocate in permgen
Reviewed-by: ysr, sla
1 /*
2 * Copyright (c) 2003, 2010, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
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
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
23 */
25 #ifndef SHARE_VM_SERVICES_MANAGEMENT_HPP
26 #define SHARE_VM_SERVICES_MANAGEMENT_HPP
28 #include "memory/allocation.hpp"
29 #include "runtime/handles.hpp"
30 #include "runtime/timer.hpp"
31 #include "services/jmm.h"
33 class OopClosure;
34 class ThreadSnapshot;
36 class Management : public AllStatic {
37 private:
38 static PerfVariable* _begin_vm_creation_time;
39 static PerfVariable* _end_vm_creation_time;
40 static PerfVariable* _vm_init_done_time;
41 static jmmOptionalSupport _optional_support;
42 static TimeStamp _stamp; // Timestamp since vm init done time
44 // Management klasses
45 static klassOop _sensor_klass;
46 static klassOop _threadInfo_klass;
47 static klassOop _memoryUsage_klass;
48 static klassOop _memoryPoolMXBean_klass;
49 static klassOop _memoryManagerMXBean_klass;
50 static klassOop _garbageCollectorMXBean_klass;
51 static klassOop _managementFactory_klass;
53 static klassOop load_and_initialize_klass(Symbol* sh, TRAPS);
55 public:
56 static void init();
57 static void initialize(TRAPS);
59 static jlong ticks_to_ms(jlong ticks);
60 static jlong timestamp();
62 static void oops_do(OopClosure* f);
63 static void* get_jmm_interface(int version);
64 static void get_optional_support(jmmOptionalSupport* support);
66 static void get_loaded_classes(JavaThread* cur_thread, GrowableArray<KlassHandle>* klass_handle_array);
68 static void record_vm_startup_time(jlong begin, jlong duration);
69 static void record_vm_init_completed() {
70 // Initialize the timestamp to get the current time
71 _vm_init_done_time->set_value(os::javaTimeMillis());
73 // Update the timestamp to the vm init done time
74 _stamp.update();
75 }
77 static jlong vm_init_done_time() {
78 return _vm_init_done_time->get_value();
79 }
81 // methods to return a klassOop.
82 static klassOop java_lang_management_ThreadInfo_klass(TRAPS);
83 static klassOop java_lang_management_MemoryUsage_klass(TRAPS);
84 static klassOop java_lang_management_MemoryPoolMXBean_klass(TRAPS);
85 static klassOop java_lang_management_MemoryManagerMXBean_klass(TRAPS);
86 static klassOop java_lang_management_GarbageCollectorMXBean_klass(TRAPS);
87 static klassOop sun_management_Sensor_klass(TRAPS);
88 static klassOop sun_management_ManagementFactory_klass(TRAPS);
90 static instanceOop create_thread_info_instance(ThreadSnapshot* snapshot, TRAPS);
91 static instanceOop create_thread_info_instance(ThreadSnapshot* snapshot, objArrayHandle monitors_array, typeArrayHandle depths_array, objArrayHandle synchronizers_array, TRAPS);
92 };
94 class TraceVmCreationTime : public StackObj {
95 private:
96 TimeStamp _timer;
97 jlong _begin_time;
99 public:
100 TraceVmCreationTime() {}
101 ~TraceVmCreationTime() {}
103 void start()
104 { _timer.update_to(0); _begin_time = os::javaTimeMillis(); }
106 /**
107 * Only call this if initialization completes successfully; it will
108 * crash if PerfMemory_exit() has already been called (usually by
109 * os::shutdown() when there was an initialization failure).
110 */
111 void end()
112 { Management::record_vm_startup_time(_begin_time, _timer.milliseconds()); }
114 };
116 #endif // SHARE_VM_SERVICES_MANAGEMENT_HPP