Mercurial > hg > graal-compiler
annotate src/share/vm/services/attachListener.hpp @ 1766:02f0a9b6f654
6969586: OptimizeStringConcat: SIGSEGV in LoadNode::Value()
Reviewed-by: kvn
author | never |
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date | Mon, 30 Aug 2010 17:27:35 -0700 |
parents | c18cbe5936b8 |
children | f95d63e2154a |
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0 | 1 /* |
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2 * Copyright (c) 2005, 2006, 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 | |
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7 * published by the Free Software Foundation. | |
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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. | |
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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 | |
25 // The AttachListener thread services a queue of operations that are enqueued | |
26 // by client tools. Each operation is identified by a name and has up to 3 | |
27 // arguments. The operation name is mapped to a function which performs the | |
28 // operation. The function is called with an outputStream which is can use to | |
29 // write any result data (for examples the properties command serializes | |
30 // properties names and values to the output stream). When the function | |
31 // complets the result value and any result data is returned to the client | |
32 // tool. | |
33 | |
34 #ifndef SERVICES_KERNEL | |
35 | |
36 class AttachOperation; | |
37 | |
38 typedef jint (*AttachOperationFunction)(AttachOperation* op, outputStream* out); | |
39 | |
40 struct AttachOperationFunctionInfo { | |
41 const char* name; | |
42 AttachOperationFunction func; | |
43 }; | |
44 #endif // SERVICES_KERNEL | |
45 | |
46 class AttachListener: AllStatic { | |
47 public: | |
48 static void init() KERNEL_RETURN; | |
49 static void abort() KERNEL_RETURN; | |
50 | |
51 // invoke to perform clean-up tasks when all clients detach | |
52 static void detachall() KERNEL_RETURN; | |
53 | |
54 // indicates if the Attach Listener needs to be created at startup | |
55 static bool init_at_startup() KERNEL_RETURN_(return false;); | |
56 | |
57 // indicates if we have a trigger to start the Attach Listener | |
58 static bool is_init_trigger() KERNEL_RETURN_(return false;); | |
59 | |
60 #ifdef SERVICES_KERNEL | |
61 static bool is_attach_supported() { return false; } | |
62 #else // SERVICES_KERNEL | |
63 private: | |
64 static volatile bool _initialized; | |
65 | |
66 public: | |
67 static bool is_initialized() { return _initialized; } | |
68 static void set_initialized() { _initialized = true; } | |
69 | |
70 // indicates if this VM supports attach-on-demand | |
71 static bool is_attach_supported() { return !DisableAttachMechanism; } | |
72 | |
73 // platform specific initialization | |
74 static int pd_init(); | |
75 | |
76 // platform specific operation | |
77 static AttachOperationFunctionInfo* pd_find_operation(const char* name); | |
78 | |
79 // platform specific flag change | |
80 static jint pd_set_flag(AttachOperation* op, outputStream* out); | |
81 | |
82 // platform specific detachall | |
83 static void pd_detachall(); | |
84 | |
85 // platform specific data dump | |
86 static void pd_data_dump(); | |
87 | |
88 // dequeue the next operation | |
89 static AttachOperation* dequeue(); | |
90 #endif // SERVICES_KERNEL | |
91 }; | |
92 | |
93 #ifndef SERVICES_KERNEL | |
94 class AttachOperation: public CHeapObj { | |
95 public: | |
96 enum { | |
97 name_length_max = 16, // maximum length of name | |
98 arg_length_max = 1024, // maximum length of argument | |
99 arg_count_max = 3 // maximum number of arguments | |
100 }; | |
101 | |
102 // name of special operation that can be enqueued when all | |
103 // clients detach | |
104 static char* detachall_operation_name() { return (char*)"detachall"; } | |
105 | |
106 private: | |
107 char _name[name_length_max+1]; | |
108 char _arg[arg_count_max][arg_length_max+1]; | |
109 | |
110 public: | |
111 const char* name() const { return _name; } | |
112 | |
113 // set the operation name | |
114 void set_name(char* name) { | |
115 assert(strlen(name) <= name_length_max, "exceeds maximum name length"); | |
116 strcpy(_name, name); | |
117 } | |
118 | |
119 // get an argument value | |
120 const char* arg(int i) const { | |
121 assert(i>=0 && i<arg_count_max, "invalid argument index"); | |
122 return _arg[i]; | |
123 } | |
124 | |
125 // set an argument value | |
126 void set_arg(int i, char* arg) { | |
127 assert(i>=0 && i<arg_count_max, "invalid argument index"); | |
128 if (arg == NULL) { | |
129 _arg[i][0] = '\0'; | |
130 } else { | |
131 assert(strlen(arg) <= arg_length_max, "exceeds maximum argument length"); | |
132 strcpy(_arg[i], arg); | |
133 } | |
134 } | |
135 | |
136 // create an operation of a given name | |
137 AttachOperation(char* name) { | |
138 set_name(name); | |
139 for (int i=0; i<arg_count_max; i++) { | |
140 set_arg(i, NULL); | |
141 } | |
142 } | |
143 | |
144 // complete operation by sending result code and any result data to the client | |
145 virtual void complete(jint result, bufferedStream* result_stream) = 0; | |
146 }; | |
147 #endif // SERVICES_KERNEL |