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annotate src/share/vm/services/attachListener.hpp @ 2426:1d1603768966
7010070: Update all 2010 Oracle-changed OpenJDK files to have the proper copyright dates - second pass
Summary: Update the copyright to be 2010 on all changed files in OpenJDK
Reviewed-by: ohair
author | trims |
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date | Tue, 05 Apr 2011 14:12:31 -0700 |
parents | bf8517f4e4d0 |
children | d2a62e0f25eb |
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0 | 1 /* |
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7010070: Update all 2010 Oracle-changed OpenJDK files to have the proper copyright dates - second pass
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2 * Copyright (c) 2005, 2011, Oracle and/or its affiliates. All rights reserved. |
0 | 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 * | |
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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. |
0 | 22 * |
23 */ | |
24 | |
1972 | 25 #ifndef SHARE_VM_SERVICES_ATTACHLISTENER_HPP |
26 #define SHARE_VM_SERVICES_ATTACHLISTENER_HPP | |
27 | |
28 #include "memory/allocation.hpp" | |
29 #include "utilities/debug.hpp" | |
30 #include "utilities/ostream.hpp" | |
31 | |
0 | 32 // The AttachListener thread services a queue of operations that are enqueued |
33 // by client tools. Each operation is identified by a name and has up to 3 | |
34 // arguments. The operation name is mapped to a function which performs the | |
35 // operation. The function is called with an outputStream which is can use to | |
36 // write any result data (for examples the properties command serializes | |
37 // properties names and values to the output stream). When the function | |
38 // complets the result value and any result data is returned to the client | |
39 // tool. | |
40 | |
41 #ifndef SERVICES_KERNEL | |
42 | |
43 class AttachOperation; | |
44 | |
45 typedef jint (*AttachOperationFunction)(AttachOperation* op, outputStream* out); | |
46 | |
47 struct AttachOperationFunctionInfo { | |
48 const char* name; | |
49 AttachOperationFunction func; | |
50 }; | |
51 #endif // SERVICES_KERNEL | |
52 | |
53 class AttachListener: AllStatic { | |
54 public: | |
55 static void init() KERNEL_RETURN; | |
56 static void abort() KERNEL_RETURN; | |
57 | |
58 // invoke to perform clean-up tasks when all clients detach | |
59 static void detachall() KERNEL_RETURN; | |
60 | |
61 // indicates if the Attach Listener needs to be created at startup | |
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62 static bool init_at_startup() KERNEL_RETURN_(false); |
0 | 63 |
64 // indicates if we have a trigger to start the Attach Listener | |
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65 static bool is_init_trigger() KERNEL_RETURN_(false); |
0 | 66 |
67 #ifdef SERVICES_KERNEL | |
68 static bool is_attach_supported() { return false; } | |
69 #else // SERVICES_KERNEL | |
70 private: | |
71 static volatile bool _initialized; | |
72 | |
73 public: | |
74 static bool is_initialized() { return _initialized; } | |
75 static void set_initialized() { _initialized = true; } | |
76 | |
77 // indicates if this VM supports attach-on-demand | |
78 static bool is_attach_supported() { return !DisableAttachMechanism; } | |
79 | |
80 // platform specific initialization | |
81 static int pd_init(); | |
82 | |
83 // platform specific operation | |
84 static AttachOperationFunctionInfo* pd_find_operation(const char* name); | |
85 | |
86 // platform specific flag change | |
87 static jint pd_set_flag(AttachOperation* op, outputStream* out); | |
88 | |
89 // platform specific detachall | |
90 static void pd_detachall(); | |
91 | |
92 // platform specific data dump | |
93 static void pd_data_dump(); | |
94 | |
95 // dequeue the next operation | |
96 static AttachOperation* dequeue(); | |
97 #endif // SERVICES_KERNEL | |
98 }; | |
99 | |
100 #ifndef SERVICES_KERNEL | |
101 class AttachOperation: public CHeapObj { | |
102 public: | |
103 enum { | |
104 name_length_max = 16, // maximum length of name | |
105 arg_length_max = 1024, // maximum length of argument | |
106 arg_count_max = 3 // maximum number of arguments | |
107 }; | |
108 | |
109 // name of special operation that can be enqueued when all | |
110 // clients detach | |
111 static char* detachall_operation_name() { return (char*)"detachall"; } | |
112 | |
113 private: | |
114 char _name[name_length_max+1]; | |
115 char _arg[arg_count_max][arg_length_max+1]; | |
116 | |
117 public: | |
118 const char* name() const { return _name; } | |
119 | |
120 // set the operation name | |
121 void set_name(char* name) { | |
122 assert(strlen(name) <= name_length_max, "exceeds maximum name length"); | |
123 strcpy(_name, name); | |
124 } | |
125 | |
126 // get an argument value | |
127 const char* arg(int i) const { | |
128 assert(i>=0 && i<arg_count_max, "invalid argument index"); | |
129 return _arg[i]; | |
130 } | |
131 | |
132 // set an argument value | |
133 void set_arg(int i, char* arg) { | |
134 assert(i>=0 && i<arg_count_max, "invalid argument index"); | |
135 if (arg == NULL) { | |
136 _arg[i][0] = '\0'; | |
137 } else { | |
138 assert(strlen(arg) <= arg_length_max, "exceeds maximum argument length"); | |
139 strcpy(_arg[i], arg); | |
140 } | |
141 } | |
142 | |
143 // create an operation of a given name | |
144 AttachOperation(char* name) { | |
145 set_name(name); | |
146 for (int i=0; i<arg_count_max; i++) { | |
147 set_arg(i, NULL); | |
148 } | |
149 } | |
150 | |
151 // complete operation by sending result code and any result data to the client | |
152 virtual void complete(jint result, bufferedStream* result_stream) = 0; | |
153 }; | |
154 #endif // SERVICES_KERNEL | |
1972 | 155 |
156 #endif // SHARE_VM_SERVICES_ATTACHLISTENER_HPP |