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comparison src/share/vm/prims/jvmtiEnvThreadState.hpp @ 0:a61af66fc99e jdk7-b24

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author duke
date Sat, 01 Dec 2007 00:00:00 +0000
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1 /*
2 * Copyright 2003-2006 Sun Microsystems, Inc. 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
20 * CA 95054 USA or visit www.sun.com if you need additional information or
21 * have any questions.
22 *
23 */
24 #ifndef _JAVA_JVMTIENVTHREADSTATE_H_
25 #define _JAVA_JVMTIENVTHREADSTATE_H_
26
27 ///////////////////////////////////////////////////////////////
28 //
29 // class JvmtiFramePop
30 // Used by : JvmtiFramePops
31 // Used by JVMTI methods: none directly.
32 //
33 // Wrapper class for FramePop, used in the JvmtiFramePops class.
34 //
35 // Two problems: 1) this isn't being used as a ValueObj class, in
36 // several places there are constructors for it. 2) It seems like
37 // overkill as a means to get an assert and name the geater than
38 // operator. I'm trying to to rewrite everything.
39
40 class JvmtiFramePop VALUE_OBJ_CLASS_SPEC {
41 private:
42 // Frame number counting from BOTTOM (oldest) frame;
43 // bottom frame == #0
44 int _frame_number;
45 public:
46 JvmtiFramePop() {}
47 JvmtiFramePop(int frame_number) {
48 assert(frame_number >= 0, "invalid frame number");
49 _frame_number = frame_number;
50 }
51
52 int frame_number() { return _frame_number; }
53 int above_on_stack(JvmtiFramePop& other) { return _frame_number > other._frame_number; }
54 void print() PRODUCT_RETURN;
55 };
56
57
58 ///////////////////////////////////////////////////////////////
59 //
60 // class JvmtiFramePops
61 // Used by : JvmtiThreadState
62 // Used by JVMTI methods: none directly.
63 //
64 // A collection of JvmtiFramePop.
65 // It records what frames on a threads stack should post frame_pop events when they're exited.
66 //
67
68 class JvmtiFramePops : public CHeapObj {
69 private:
70 GrowableArray<int>* _pops;
71
72 // should only be used by JvmtiEventControllerPrivate
73 // to insure they only occur at safepoints.
74 // Todo: add checks for safepoint
75 friend class JvmtiEventControllerPrivate;
76 void set(JvmtiFramePop& fp);
77 void clear(JvmtiFramePop& fp);
78 int clear_to(JvmtiFramePop& fp);
79
80 public:
81 JvmtiFramePops();
82 ~JvmtiFramePops();
83
84 bool contains(JvmtiFramePop& fp) { return _pops->contains(fp.frame_number()); }
85 int length() { return _pops->length(); }
86 void print() PRODUCT_RETURN;
87 };
88
89
90 ///////////////////////////////////////////////////////////////
91 //
92 // class JvmtiEnvThreadState
93 //
94 // 2. Cache of pending frame_pop_events, created by NotifyFramePop
95 // and lazily initialized.
96 // 3: Location of last executed instruction, used to filter out duplicate
97 // events due to instruction rewriting.
98
99 class JvmtiEnvThreadState : public CHeapObj {
100 private:
101 friend class JvmtiEnv;
102 JavaThread *_thread;
103 JvmtiEnv *_env;
104 JvmtiEnvThreadState *_next;
105 jmethodID _current_method_id;
106 int _current_bci;
107 bool _breakpoint_posted;
108 bool _single_stepping_posted;
109 JvmtiEnvThreadEventEnable _event_enable;
110 void *_agent_thread_local_storage_data; // per env and per thread agent allocated data.
111
112 // Class used to store pending framepops.
113 // lazily initialized by get_frame_pops();
114 JvmtiFramePops *_frame_pops;
115
116 inline void set_current_location(jmethodID method_id, int bci) {
117 _current_method_id = method_id;
118 _current_bci = bci;
119 }
120
121 friend class JvmtiEnvThreadStateIterator;
122 JvmtiEnvThreadState* next() { return _next; }
123
124 friend class JvmtiThreadState;
125 void set_next(JvmtiEnvThreadState* link) { _next = link; }
126
127 public:
128 JvmtiEnvThreadState(JavaThread *thread, JvmtiEnvBase *env);
129 ~JvmtiEnvThreadState();
130
131 bool is_enabled(jvmtiEvent event_type) { return _event_enable.is_enabled(event_type); }
132
133 JvmtiEnvThreadEventEnable *event_enable() { return &_event_enable; }
134 void *get_agent_thread_local_storage_data() { return _agent_thread_local_storage_data; }
135 void set_agent_thread_local_storage_data (void *data) { _agent_thread_local_storage_data = data; }
136
137
138 // If the thread is in the given method at the given
139 // location just return. Otherwise, reset the current location
140 // and reset _breakpoint_posted and _single_stepping_posted.
141 // _breakpoint_posted and _single_stepping_posted are only cleared
142 // here.
143 void compare_and_set_current_location(methodOop method, address location, jvmtiEvent event);
144
145 void clear_current_location() { set_current_location((jmethodID)NULL, 0); }
146
147 void reset_current_location(jvmtiEvent event, bool enabled);
148
149 inline void set_breakpoint_posted() { _breakpoint_posted = true; }
150 inline void set_single_stepping_posted() {
151 _single_stepping_posted = true;
152 }
153 inline bool breakpoint_posted() { return _breakpoint_posted; }
154 inline bool single_stepping_posted() {
155 return _single_stepping_posted;
156 }
157
158 inline JavaThread *get_thread() { return _thread; }
159 inline JvmtiEnv *get_env() { return _env; }
160
161 // lazily initialize _frame_pops
162 JvmtiFramePops* get_frame_pops();
163
164 bool has_frame_pops();
165
166 // quickly test whether we should deliver a frame pop event on return from sp
167 bool is_frame_pop(int cur_stack_depth);
168
169 void set_frame_pop(int frame_number);
170 void clear_frame_pop(int frame_number);
171 void clear_to_frame_pop(int frame_number);
172
173 };
174
175 #endif /* _JAVA_JVMTIENVTHREADSTATE_H_ */