Thu, 09 Dec 2010 15:04:26 -0500
7004582: Add GetThisObject() function to JVMTI 1.2
Summary: Add 'GetThisObject' function
Reviewed-by: never, coleenp
1 /*
2 * Copyright (c) 1999, 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_PRIMS_JVMTIUTIL_HPP
26 #define SHARE_VM_PRIMS_JVMTIUTIL_HPP
28 #include "jvmtifiles/jvmti.h"
29 #include "memory/resourceArea.hpp"
30 #include "prims/jvmtiEventController.hpp"
32 ///////////////////////////////////////////////////////////////
33 //
34 // class JvmtiUtil
35 //
36 // class for miscellaneous jvmti utility static methods
37 //
39 class JvmtiUtil : AllStatic {
41 static ResourceArea* _single_threaded_resource_area;
43 static const char* _error_names[];
44 static const bool _event_threaded[];
46 public:
48 static ResourceArea* single_threaded_resource_area();
50 static const char* error_name(int num) { return _error_names[num]; } // To Do: add range checking
52 static const bool has_event_capability(jvmtiEvent event_type, const jvmtiCapabilities* capabilities_ptr);
54 static const bool event_threaded(int num) {
55 if (num >= JVMTI_MIN_EVENT_TYPE_VAL && num <= JVMTI_MAX_EVENT_TYPE_VAL) {
56 return _event_threaded[num];
57 }
58 if (num >= EXT_MIN_EVENT_TYPE_VAL && num <= EXT_MAX_EVENT_TYPE_VAL) {
59 return false;
60 }
61 ShouldNotReachHere();
62 return false;
63 }
64 };
67 ///////////////////////////////////////////////////////////////
68 //
69 // class SafeResourceMark
70 //
71 // ResourceMarks that work before threads exist
72 //
74 class SafeResourceMark : public ResourceMark {
76 ResourceArea* safe_resource_area() {
77 Thread* thread;
79 if (Threads::number_of_threads() == 0) {
80 return JvmtiUtil::single_threaded_resource_area();
81 }
82 thread = ThreadLocalStorage::thread();
83 if (thread == NULL) {
84 return JvmtiUtil::single_threaded_resource_area();
85 }
86 return thread->resource_area();
87 }
89 public:
91 SafeResourceMark() : ResourceMark(safe_resource_area()) {}
93 };
95 #endif // SHARE_VM_PRIMS_JVMTIUTIL_HPP