Mercurial > hg > truffle
annotate src/share/vm/services/attachListener.hpp @ 14518:d8041d695d19
Merged with jdk9/dev/hotspot changeset 3812c088b945
| author | twisti |
|---|---|
| date | Tue, 11 Mar 2014 18:45:59 -0700 |
| parents | 23c27f9ae1e8 |
| children | 4ca6dc0799b6 |
| rev | line source |
|---|---|
| 0 | 1 /* |
| 7951 | 2 * Copyright (c) 2005, 2013, 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" | |
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31 #include "utilities/macros.hpp" |
| 1972 | 32 |
| 0 | 33 // The AttachListener thread services a queue of operations that are enqueued |
| 34 // by client tools. Each operation is identified by a name and has up to 3 | |
| 35 // arguments. The operation name is mapped to a function which performs the | |
| 36 // operation. The function is called with an outputStream which is can use to | |
| 37 // write any result data (for examples the properties command serializes | |
| 38 // properties names and values to the output stream). When the function | |
| 39 // complets the result value and any result data is returned to the client | |
| 40 // tool. | |
| 41 | |
| 42 class AttachOperation; | |
| 43 | |
| 44 typedef jint (*AttachOperationFunction)(AttachOperation* op, outputStream* out); | |
| 45 | |
| 46 struct AttachOperationFunctionInfo { | |
| 47 const char* name; | |
| 48 AttachOperationFunction func; | |
| 49 }; | |
| 50 | |
| 51 class AttachListener: AllStatic { | |
| 52 public: | |
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53 static void vm_start() NOT_SERVICES_RETURN; |
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54 static void init() NOT_SERVICES_RETURN; |
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55 static void abort() NOT_SERVICES_RETURN; |
| 0 | 56 |
| 57 // invoke to perform clean-up tasks when all clients detach | |
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58 static void detachall() NOT_SERVICES_RETURN; |
| 0 | 59 |
| 60 // indicates if the Attach Listener needs to be created at startup | |
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61 static bool init_at_startup() NOT_SERVICES_RETURN_(false); |
| 0 | 62 |
| 63 // indicates if we have a trigger to start the Attach Listener | |
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64 static bool is_init_trigger() NOT_SERVICES_RETURN_(false); |
| 0 | 65 |
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66 #if !INCLUDE_SERVICES |
| 0 | 67 static bool is_attach_supported() { return false; } |
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68 #else |
| 0 | 69 private: |
| 70 static volatile bool _initialized; | |
| 71 | |
| 72 public: | |
| 73 static bool is_initialized() { return _initialized; } | |
| 74 static void set_initialized() { _initialized = true; } | |
| 75 | |
| 76 // indicates if this VM supports attach-on-demand | |
| 77 static bool is_attach_supported() { return !DisableAttachMechanism; } | |
| 78 | |
| 79 // platform specific initialization | |
| 80 static int pd_init(); | |
| 81 | |
| 82 // platform specific operation | |
| 83 static AttachOperationFunctionInfo* pd_find_operation(const char* name); | |
| 84 | |
| 85 // platform specific flag change | |
| 86 static jint pd_set_flag(AttachOperation* op, outputStream* out); | |
| 87 | |
| 88 // platform specific detachall | |
| 89 static void pd_detachall(); | |
| 90 | |
| 91 // platform specific data dump | |
| 92 static void pd_data_dump(); | |
| 93 | |
| 94 // dequeue the next operation | |
| 95 static AttachOperation* dequeue(); | |
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96 #endif // !INCLUDE_SERVICES |
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97 |
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98 private: |
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99 static bool has_init_error(TRAPS); |
| 0 | 100 }; |
| 101 | |
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102 #if INCLUDE_SERVICES |
| 6197 | 103 class AttachOperation: public CHeapObj<mtInternal> { |
| 0 | 104 public: |
| 105 enum { | |
| 106 name_length_max = 16, // maximum length of name | |
| 107 arg_length_max = 1024, // maximum length of argument | |
| 108 arg_count_max = 3 // maximum number of arguments | |
| 109 }; | |
| 110 | |
| 111 // name of special operation that can be enqueued when all | |
| 112 // clients detach | |
| 113 static char* detachall_operation_name() { return (char*)"detachall"; } | |
| 114 | |
| 115 private: | |
| 116 char _name[name_length_max+1]; | |
| 117 char _arg[arg_count_max][arg_length_max+1]; | |
| 118 | |
| 119 public: | |
| 120 const char* name() const { return _name; } | |
| 121 | |
| 122 // set the operation name | |
| 123 void set_name(char* name) { | |
| 124 assert(strlen(name) <= name_length_max, "exceeds maximum name length"); | |
| 125 strcpy(_name, name); | |
| 126 } | |
| 127 | |
| 128 // get an argument value | |
| 129 const char* arg(int i) const { | |
| 130 assert(i>=0 && i<arg_count_max, "invalid argument index"); | |
| 131 return _arg[i]; | |
| 132 } | |
| 133 | |
| 134 // set an argument value | |
| 135 void set_arg(int i, char* arg) { | |
| 136 assert(i>=0 && i<arg_count_max, "invalid argument index"); | |
| 137 if (arg == NULL) { | |
| 138 _arg[i][0] = '\0'; | |
| 139 } else { | |
| 140 assert(strlen(arg) <= arg_length_max, "exceeds maximum argument length"); | |
| 141 strcpy(_arg[i], arg); | |
| 142 } | |
| 143 } | |
| 144 | |
| 145 // create an operation of a given name | |
| 146 AttachOperation(char* name) { | |
| 147 set_name(name); | |
| 148 for (int i=0; i<arg_count_max; i++) { | |
| 149 set_arg(i, NULL); | |
| 150 } | |
| 151 } | |
| 152 | |
| 153 // complete operation by sending result code and any result data to the client | |
| 154 virtual void complete(jint result, bufferedStream* result_stream) = 0; | |
| 155 }; | |
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156 #endif // INCLUDE_SERVICES |
| 1972 | 157 |
| 158 #endif // SHARE_VM_SERVICES_ATTACHLISTENER_HPP |