Fri, 11 Feb 2011 14:15:16 +0100
7018257: jmm_DumpThreads allocates into permgen
Summary: Don't allocate in permgen
Reviewed-by: ysr, sla
duke@435 | 1 | /* |
stefank@2314 | 2 | * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved. |
duke@435 | 3 | * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
duke@435 | 4 | * |
duke@435 | 5 | * This code is free software; you can redistribute it and/or modify it |
duke@435 | 6 | * under the terms of the GNU General Public License version 2 only, as |
duke@435 | 7 | * published by the Free Software Foundation. |
duke@435 | 8 | * |
duke@435 | 9 | * This code is distributed in the hope that it will be useful, but WITHOUT |
duke@435 | 10 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
duke@435 | 11 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
duke@435 | 12 | * version 2 for more details (a copy is included in the LICENSE file that |
duke@435 | 13 | * accompanied this code). |
duke@435 | 14 | * |
duke@435 | 15 | * You should have received a copy of the GNU General Public License version |
duke@435 | 16 | * 2 along with this work; if not, write to the Free Software Foundation, |
duke@435 | 17 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
duke@435 | 18 | * |
trims@1907 | 19 | * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
trims@1907 | 20 | * or visit www.oracle.com if you need additional information or have any |
trims@1907 | 21 | * questions. |
duke@435 | 22 | * |
duke@435 | 23 | */ |
duke@435 | 24 | |
stefank@2314 | 25 | #include "precompiled.hpp" |
stefank@2314 | 26 | #include "classfile/javaClasses.hpp" |
stefank@2314 | 27 | #include "classfile/systemDictionary.hpp" |
stefank@2314 | 28 | #include "gc_implementation/shared/vmGCOperations.hpp" |
stefank@2314 | 29 | #include "memory/resourceArea.hpp" |
stefank@2314 | 30 | #include "prims/jvmtiExport.hpp" |
stefank@2314 | 31 | #include "runtime/arguments.hpp" |
stefank@2314 | 32 | #include "runtime/globals.hpp" |
stefank@2314 | 33 | #include "runtime/java.hpp" |
stefank@2314 | 34 | #include "runtime/javaCalls.hpp" |
stefank@2314 | 35 | #include "runtime/os.hpp" |
stefank@2314 | 36 | #include "services/attachListener.hpp" |
stefank@2314 | 37 | #include "services/heapDumper.hpp" |
duke@435 | 38 | |
duke@435 | 39 | volatile bool AttachListener::_initialized; |
duke@435 | 40 | |
duke@435 | 41 | // Implementation of "properties" command. |
duke@435 | 42 | // |
duke@435 | 43 | // Invokes sun.misc.VMSupport.serializePropertiesToByteArray to serialize |
duke@435 | 44 | // the system properties into a byte array. |
duke@435 | 45 | |
coleenp@2497 | 46 | static klassOop load_and_initialize_klass(Symbol* sh, TRAPS) { |
duke@435 | 47 | klassOop k = SystemDictionary::resolve_or_fail(sh, true, CHECK_NULL); |
duke@435 | 48 | instanceKlassHandle ik (THREAD, k); |
duke@435 | 49 | if (ik->should_be_initialized()) { |
duke@435 | 50 | ik->initialize(CHECK_NULL); |
duke@435 | 51 | } |
duke@435 | 52 | return ik(); |
duke@435 | 53 | } |
duke@435 | 54 | |
coleenp@2497 | 55 | static jint get_properties(AttachOperation* op, outputStream* out, Symbol* serializePropertiesMethod) { |
duke@435 | 56 | Thread* THREAD = Thread::current(); |
duke@435 | 57 | HandleMark hm; |
duke@435 | 58 | |
duke@435 | 59 | // load sun.misc.VMSupport |
coleenp@2497 | 60 | Symbol* klass = vmSymbols::sun_misc_VMSupport(); |
duke@435 | 61 | klassOop k = load_and_initialize_klass(klass, THREAD); |
duke@435 | 62 | if (HAS_PENDING_EXCEPTION) { |
duke@435 | 63 | java_lang_Throwable::print(PENDING_EXCEPTION, out); |
duke@435 | 64 | CLEAR_PENDING_EXCEPTION; |
duke@435 | 65 | return JNI_ERR; |
duke@435 | 66 | } |
duke@435 | 67 | instanceKlassHandle ik(THREAD, k); |
duke@435 | 68 | |
duke@435 | 69 | // invoke the serializePropertiesToByteArray method |
duke@435 | 70 | JavaValue result(T_OBJECT); |
duke@435 | 71 | JavaCallArguments args; |
duke@435 | 72 | |
duke@435 | 73 | |
coleenp@2497 | 74 | Symbol* signature = vmSymbols::serializePropertiesToByteArray_signature(); |
duke@435 | 75 | JavaCalls::call_static(&result, |
duke@435 | 76 | ik, |
duke@435 | 77 | serializePropertiesMethod, |
duke@435 | 78 | signature, |
duke@435 | 79 | &args, |
duke@435 | 80 | THREAD); |
duke@435 | 81 | if (HAS_PENDING_EXCEPTION) { |
duke@435 | 82 | java_lang_Throwable::print(PENDING_EXCEPTION, out); |
duke@435 | 83 | CLEAR_PENDING_EXCEPTION; |
duke@435 | 84 | return JNI_ERR; |
duke@435 | 85 | } |
duke@435 | 86 | |
duke@435 | 87 | // The result should be a [B |
duke@435 | 88 | oop res = (oop)result.get_jobject(); |
duke@435 | 89 | assert(res->is_typeArray(), "just checking"); |
duke@435 | 90 | assert(typeArrayKlass::cast(res->klass())->element_type() == T_BYTE, "just checking"); |
duke@435 | 91 | |
duke@435 | 92 | // copy the bytes to the output stream |
duke@435 | 93 | typeArrayOop ba = typeArrayOop(res); |
duke@435 | 94 | jbyte* addr = typeArrayOop(res)->byte_at_addr(0); |
duke@435 | 95 | out->print_raw((const char*)addr, ba->length()); |
duke@435 | 96 | |
duke@435 | 97 | return JNI_OK; |
duke@435 | 98 | } |
duke@435 | 99 | |
duke@435 | 100 | // Implementation of "properties" command. |
duke@435 | 101 | static jint get_system_properties(AttachOperation* op, outputStream* out) { |
coleenp@2497 | 102 | return get_properties(op, out, vmSymbols::serializePropertiesToByteArray_name()); |
duke@435 | 103 | } |
duke@435 | 104 | |
duke@435 | 105 | // Implementation of "agent_properties" command. |
duke@435 | 106 | static jint get_agent_properties(AttachOperation* op, outputStream* out) { |
coleenp@2497 | 107 | return get_properties(op, out, vmSymbols::serializeAgentPropertiesToByteArray_name()); |
duke@435 | 108 | } |
duke@435 | 109 | |
duke@435 | 110 | // Implementation of "datadump" command. |
duke@435 | 111 | // |
duke@435 | 112 | // Raises a SIGBREAK signal so that VM dump threads, does deadlock detection, |
duke@435 | 113 | // etc. In theory this command should only post a DataDumpRequest to any |
duke@435 | 114 | // JVMTI environment that has enabled this event. However it's useful to |
duke@435 | 115 | // trigger the SIGBREAK handler. |
duke@435 | 116 | |
duke@435 | 117 | static jint data_dump(AttachOperation* op, outputStream* out) { |
duke@435 | 118 | if (!ReduceSignalUsage) { |
duke@435 | 119 | AttachListener::pd_data_dump(); |
duke@435 | 120 | } else { |
duke@435 | 121 | if (JvmtiExport::should_post_data_dump()) { |
duke@435 | 122 | JvmtiExport::post_data_dump(); |
duke@435 | 123 | } |
duke@435 | 124 | } |
duke@435 | 125 | return JNI_OK; |
duke@435 | 126 | } |
duke@435 | 127 | |
duke@435 | 128 | // Implementation of "threaddump" command - essentially a remote ctrl-break |
duke@435 | 129 | // |
duke@435 | 130 | static jint thread_dump(AttachOperation* op, outputStream* out) { |
duke@435 | 131 | bool print_concurrent_locks = false; |
duke@435 | 132 | if (op->arg(0) != NULL && strcmp(op->arg(0), "-l") == 0) { |
duke@435 | 133 | print_concurrent_locks = true; |
duke@435 | 134 | } |
duke@435 | 135 | |
duke@435 | 136 | // thread stacks |
duke@435 | 137 | VM_PrintThreads op1(out, print_concurrent_locks); |
duke@435 | 138 | VMThread::execute(&op1); |
duke@435 | 139 | |
duke@435 | 140 | // JNI global handles |
duke@435 | 141 | VM_PrintJNI op2(out); |
duke@435 | 142 | VMThread::execute(&op2); |
duke@435 | 143 | |
duke@435 | 144 | // Deadlock detection |
duke@435 | 145 | VM_FindDeadlocks op3(out); |
duke@435 | 146 | VMThread::execute(&op3); |
duke@435 | 147 | |
duke@435 | 148 | return JNI_OK; |
duke@435 | 149 | } |
duke@435 | 150 | |
duke@435 | 151 | #ifndef SERVICES_KERNEL // Heap dumping not supported |
duke@435 | 152 | // Implementation of "dumpheap" command. |
duke@435 | 153 | // |
duke@435 | 154 | // Input arguments :- |
duke@435 | 155 | // arg0: Name of the dump file |
duke@435 | 156 | // arg1: "-live" or "-all" |
duke@435 | 157 | jint dump_heap(AttachOperation* op, outputStream* out) { |
duke@435 | 158 | const char* path = op->arg(0); |
duke@435 | 159 | if (path == NULL || path[0] == '\0') { |
duke@435 | 160 | out->print_cr("No dump file specified"); |
duke@435 | 161 | } else { |
duke@435 | 162 | bool live_objects_only = true; // default is true to retain the behavior before this change is made |
duke@435 | 163 | const char* arg1 = op->arg(1); |
duke@435 | 164 | if (arg1 != NULL && (strlen(arg1) > 0)) { |
duke@435 | 165 | if (strcmp(arg1, "-all") != 0 && strcmp(arg1, "-live") != 0) { |
duke@435 | 166 | out->print_cr("Invalid argument to dumpheap operation: %s", arg1); |
duke@435 | 167 | return JNI_ERR; |
duke@435 | 168 | } |
duke@435 | 169 | live_objects_only = strcmp(arg1, "-live") == 0; |
duke@435 | 170 | } |
duke@435 | 171 | |
duke@435 | 172 | // Request a full GC before heap dump if live_objects_only = true |
duke@435 | 173 | // This helps reduces the amount of unreachable objects in the dump |
duke@435 | 174 | // and makes it easier to browse. |
duke@435 | 175 | HeapDumper dumper(live_objects_only /* request GC */); |
duke@435 | 176 | int res = dumper.dump(op->arg(0)); |
duke@435 | 177 | if (res == 0) { |
duke@435 | 178 | out->print_cr("Heap dump file created"); |
duke@435 | 179 | } else { |
duke@435 | 180 | // heap dump failed |
duke@435 | 181 | ResourceMark rm; |
duke@435 | 182 | char* error = dumper.error_as_C_string(); |
duke@435 | 183 | if (error == NULL) { |
duke@435 | 184 | out->print_cr("Dump failed - reason unknown"); |
duke@435 | 185 | } else { |
duke@435 | 186 | out->print_cr("%s", error); |
duke@435 | 187 | } |
duke@435 | 188 | } |
duke@435 | 189 | } |
duke@435 | 190 | return JNI_OK; |
duke@435 | 191 | } |
duke@435 | 192 | #endif // SERVICES_KERNEL |
duke@435 | 193 | |
duke@435 | 194 | // Implementation of "inspectheap" command |
duke@435 | 195 | // |
duke@435 | 196 | // Input arguments :- |
duke@435 | 197 | // arg0: "-live" or "-all" |
duke@435 | 198 | static jint heap_inspection(AttachOperation* op, outputStream* out) { |
duke@435 | 199 | bool live_objects_only = true; // default is true to retain the behavior before this change is made |
duke@435 | 200 | const char* arg0 = op->arg(0); |
duke@435 | 201 | if (arg0 != NULL && (strlen(arg0) > 0)) { |
duke@435 | 202 | if (strcmp(arg0, "-all") != 0 && strcmp(arg0, "-live") != 0) { |
duke@435 | 203 | out->print_cr("Invalid argument to inspectheap operation: %s", arg0); |
duke@435 | 204 | return JNI_ERR; |
duke@435 | 205 | } |
duke@435 | 206 | live_objects_only = strcmp(arg0, "-live") == 0; |
duke@435 | 207 | } |
ysr@1050 | 208 | VM_GC_HeapInspection heapop(out, live_objects_only /* request full gc */, true /* need_prologue */); |
duke@435 | 209 | VMThread::execute(&heapop); |
duke@435 | 210 | return JNI_OK; |
duke@435 | 211 | } |
duke@435 | 212 | |
duke@435 | 213 | // set a boolean global flag using value from AttachOperation |
duke@435 | 214 | static jint set_bool_flag(const char* name, AttachOperation* op, outputStream* out) { |
duke@435 | 215 | bool value = true; |
duke@435 | 216 | const char* arg1; |
duke@435 | 217 | if ((arg1 = op->arg(1)) != NULL) { |
duke@435 | 218 | int tmp; |
duke@435 | 219 | int n = sscanf(arg1, "%d", &tmp); |
duke@435 | 220 | if (n != 1) { |
phh@1502 | 221 | out->print_cr("flag value must be a boolean (1 or 0)"); |
duke@435 | 222 | return JNI_ERR; |
duke@435 | 223 | } |
duke@435 | 224 | value = (tmp != 0); |
duke@435 | 225 | } |
duke@435 | 226 | bool res = CommandLineFlags::boolAtPut((char*)name, &value, ATTACH_ON_DEMAND); |
duke@435 | 227 | if (! res) { |
duke@435 | 228 | out->print_cr("setting flag %s failed", name); |
duke@435 | 229 | } |
duke@435 | 230 | return res? JNI_OK : JNI_ERR; |
duke@435 | 231 | } |
duke@435 | 232 | |
duke@435 | 233 | // set a intx global flag using value from AttachOperation |
duke@435 | 234 | static jint set_intx_flag(const char* name, AttachOperation* op, outputStream* out) { |
duke@435 | 235 | intx value; |
duke@435 | 236 | const char* arg1; |
duke@435 | 237 | if ((arg1 = op->arg(1)) != NULL) { |
duke@435 | 238 | int n = sscanf(arg1, INTX_FORMAT, &value); |
duke@435 | 239 | if (n != 1) { |
phh@1502 | 240 | out->print_cr("flag value must be an integer"); |
duke@435 | 241 | return JNI_ERR; |
duke@435 | 242 | } |
duke@435 | 243 | } |
phh@1502 | 244 | bool res = CommandLineFlags::intxAtPut((char*)name, &value, ATTACH_ON_DEMAND); |
duke@435 | 245 | if (! res) { |
duke@435 | 246 | out->print_cr("setting flag %s failed", name); |
duke@435 | 247 | } |
duke@435 | 248 | |
duke@435 | 249 | return res? JNI_OK : JNI_ERR; |
duke@435 | 250 | } |
duke@435 | 251 | |
duke@435 | 252 | // set a uintx global flag using value from AttachOperation |
duke@435 | 253 | static jint set_uintx_flag(const char* name, AttachOperation* op, outputStream* out) { |
duke@435 | 254 | uintx value; |
duke@435 | 255 | const char* arg1; |
duke@435 | 256 | if ((arg1 = op->arg(1)) != NULL) { |
duke@435 | 257 | int n = sscanf(arg1, UINTX_FORMAT, &value); |
duke@435 | 258 | if (n != 1) { |
phh@1502 | 259 | out->print_cr("flag value must be an unsigned integer"); |
duke@435 | 260 | return JNI_ERR; |
duke@435 | 261 | } |
duke@435 | 262 | } |
phh@1502 | 263 | bool res = CommandLineFlags::uintxAtPut((char*)name, &value, ATTACH_ON_DEMAND); |
phh@1502 | 264 | if (! res) { |
phh@1502 | 265 | out->print_cr("setting flag %s failed", name); |
phh@1502 | 266 | } |
phh@1502 | 267 | |
phh@1502 | 268 | return res? JNI_OK : JNI_ERR; |
phh@1502 | 269 | } |
phh@1502 | 270 | |
phh@1502 | 271 | // set a uint64_t global flag using value from AttachOperation |
phh@1502 | 272 | static jint set_uint64_t_flag(const char* name, AttachOperation* op, outputStream* out) { |
phh@1502 | 273 | uint64_t value; |
phh@1502 | 274 | const char* arg1; |
phh@1502 | 275 | if ((arg1 = op->arg(1)) != NULL) { |
phh@1502 | 276 | int n = sscanf(arg1, UINT64_FORMAT, &value); |
phh@1502 | 277 | if (n != 1) { |
phh@1502 | 278 | out->print_cr("flag value must be an unsigned 64-bit integer"); |
phh@1502 | 279 | return JNI_ERR; |
phh@1502 | 280 | } |
phh@1502 | 281 | } |
phh@1502 | 282 | bool res = CommandLineFlags::uint64_tAtPut((char*)name, &value, ATTACH_ON_DEMAND); |
duke@435 | 283 | if (! res) { |
duke@435 | 284 | out->print_cr("setting flag %s failed", name); |
duke@435 | 285 | } |
duke@435 | 286 | |
duke@435 | 287 | return res? JNI_OK : JNI_ERR; |
duke@435 | 288 | } |
duke@435 | 289 | |
duke@435 | 290 | // set a string global flag using value from AttachOperation |
duke@435 | 291 | static jint set_ccstr_flag(const char* name, AttachOperation* op, outputStream* out) { |
duke@435 | 292 | const char* value; |
duke@435 | 293 | if ((value = op->arg(1)) == NULL) { |
phh@1502 | 294 | out->print_cr("flag value must be a string"); |
duke@435 | 295 | return JNI_ERR; |
duke@435 | 296 | } |
phh@1502 | 297 | bool res = CommandLineFlags::ccstrAtPut((char*)name, &value, ATTACH_ON_DEMAND); |
duke@435 | 298 | if (res) { |
duke@435 | 299 | FREE_C_HEAP_ARRAY(char, value); |
duke@435 | 300 | } else { |
duke@435 | 301 | out->print_cr("setting flag %s failed", name); |
duke@435 | 302 | } |
duke@435 | 303 | |
duke@435 | 304 | return res? JNI_OK : JNI_ERR; |
duke@435 | 305 | } |
duke@435 | 306 | |
duke@435 | 307 | // Implementation of "setflag" command |
duke@435 | 308 | static jint set_flag(AttachOperation* op, outputStream* out) { |
duke@435 | 309 | |
duke@435 | 310 | const char* name = NULL; |
duke@435 | 311 | if ((name = op->arg(0)) == NULL) { |
duke@435 | 312 | out->print_cr("flag name is missing"); |
duke@435 | 313 | return JNI_ERR; |
duke@435 | 314 | } |
duke@435 | 315 | |
duke@435 | 316 | Flag* f = Flag::find_flag((char*)name, strlen(name)); |
duke@435 | 317 | if (f && f->is_external() && f->is_writeable()) { |
duke@435 | 318 | if (f->is_bool()) { |
duke@435 | 319 | return set_bool_flag(name, op, out); |
duke@435 | 320 | } else if (f->is_intx()) { |
duke@435 | 321 | return set_intx_flag(name, op, out); |
duke@435 | 322 | } else if (f->is_uintx()) { |
duke@435 | 323 | return set_uintx_flag(name, op, out); |
phh@1502 | 324 | } else if (f->is_uint64_t()) { |
phh@1502 | 325 | return set_uint64_t_flag(name, op, out); |
duke@435 | 326 | } else if (f->is_ccstr()) { |
duke@435 | 327 | return set_ccstr_flag(name, op, out); |
duke@435 | 328 | } else { |
duke@435 | 329 | ShouldNotReachHere(); |
duke@435 | 330 | return JNI_ERR; |
duke@435 | 331 | } |
duke@435 | 332 | } else { |
duke@435 | 333 | return AttachListener::pd_set_flag(op, out); |
duke@435 | 334 | } |
duke@435 | 335 | } |
duke@435 | 336 | |
duke@435 | 337 | // Implementation of "printflag" command |
duke@435 | 338 | static jint print_flag(AttachOperation* op, outputStream* out) { |
duke@435 | 339 | const char* name = NULL; |
duke@435 | 340 | if ((name = op->arg(0)) == NULL) { |
duke@435 | 341 | out->print_cr("flag name is missing"); |
duke@435 | 342 | return JNI_ERR; |
duke@435 | 343 | } |
duke@435 | 344 | Flag* f = Flag::find_flag((char*)name, strlen(name)); |
duke@435 | 345 | if (f) { |
duke@435 | 346 | f->print_as_flag(out); |
duke@435 | 347 | out->print_cr(""); |
duke@435 | 348 | } else { |
duke@435 | 349 | out->print_cr("no such flag '%s'", name); |
duke@435 | 350 | } |
duke@435 | 351 | return JNI_OK; |
duke@435 | 352 | } |
duke@435 | 353 | |
duke@435 | 354 | // Table to map operation names to functions. |
duke@435 | 355 | |
duke@435 | 356 | // names must be of length <= AttachOperation::name_length_max |
duke@435 | 357 | static AttachOperationFunctionInfo funcs[] = { |
duke@435 | 358 | { "agentProperties", get_agent_properties }, |
duke@435 | 359 | { "datadump", data_dump }, |
duke@435 | 360 | #ifndef SERVICES_KERNEL |
duke@435 | 361 | { "dumpheap", dump_heap }, |
duke@435 | 362 | #endif // SERVICES_KERNEL |
duke@435 | 363 | { "load", JvmtiExport::load_agent_library }, |
duke@435 | 364 | { "properties", get_system_properties }, |
duke@435 | 365 | { "threaddump", thread_dump }, |
duke@435 | 366 | { "inspectheap", heap_inspection }, |
duke@435 | 367 | { "setflag", set_flag }, |
duke@435 | 368 | { "printflag", print_flag }, |
duke@435 | 369 | { NULL, NULL } |
duke@435 | 370 | }; |
duke@435 | 371 | |
duke@435 | 372 | |
duke@435 | 373 | |
duke@435 | 374 | // The Attach Listener threads services a queue. It dequeues an operation |
duke@435 | 375 | // from the queue, examines the operation name (command), and dispatches |
duke@435 | 376 | // to the corresponding function to perform the operation. |
duke@435 | 377 | |
duke@435 | 378 | static void attach_listener_thread_entry(JavaThread* thread, TRAPS) { |
duke@435 | 379 | os::set_priority(thread, NearMaxPriority); |
duke@435 | 380 | |
duke@435 | 381 | if (AttachListener::pd_init() != 0) { |
duke@435 | 382 | return; |
duke@435 | 383 | } |
duke@435 | 384 | AttachListener::set_initialized(); |
duke@435 | 385 | |
duke@435 | 386 | for (;;) { |
duke@435 | 387 | AttachOperation* op = AttachListener::dequeue(); |
duke@435 | 388 | if (op == NULL) { |
duke@435 | 389 | return; // dequeue failed or shutdown |
duke@435 | 390 | } |
duke@435 | 391 | |
duke@435 | 392 | ResourceMark rm; |
duke@435 | 393 | bufferedStream st; |
duke@435 | 394 | jint res = JNI_OK; |
duke@435 | 395 | |
duke@435 | 396 | // handle special detachall operation |
duke@435 | 397 | if (strcmp(op->name(), AttachOperation::detachall_operation_name()) == 0) { |
duke@435 | 398 | AttachListener::detachall(); |
duke@435 | 399 | } else { |
duke@435 | 400 | // find the function to dispatch too |
duke@435 | 401 | AttachOperationFunctionInfo* info = NULL; |
duke@435 | 402 | for (int i=0; funcs[i].name != NULL; i++) { |
duke@435 | 403 | const char* name = funcs[i].name; |
duke@435 | 404 | assert(strlen(name) <= AttachOperation::name_length_max, "operation <= name_length_max"); |
duke@435 | 405 | if (strcmp(op->name(), name) == 0) { |
duke@435 | 406 | info = &(funcs[i]); |
duke@435 | 407 | break; |
duke@435 | 408 | } |
duke@435 | 409 | } |
duke@435 | 410 | |
duke@435 | 411 | // check for platform dependent attach operation |
duke@435 | 412 | if (info == NULL) { |
duke@435 | 413 | info = AttachListener::pd_find_operation(op->name()); |
duke@435 | 414 | } |
duke@435 | 415 | |
duke@435 | 416 | if (info != NULL) { |
duke@435 | 417 | // dispatch to the function that implements this operation |
duke@435 | 418 | res = (info->func)(op, &st); |
duke@435 | 419 | } else { |
duke@435 | 420 | st.print("Operation %s not recognized!", op->name()); |
duke@435 | 421 | res = JNI_ERR; |
duke@435 | 422 | } |
duke@435 | 423 | } |
duke@435 | 424 | |
duke@435 | 425 | // operation complete - send result and output to client |
duke@435 | 426 | op->complete(res, &st); |
duke@435 | 427 | } |
duke@435 | 428 | } |
duke@435 | 429 | |
duke@435 | 430 | // Starts the Attach Listener thread |
duke@435 | 431 | void AttachListener::init() { |
duke@435 | 432 | EXCEPTION_MARK; |
coleenp@2497 | 433 | klassOop k = SystemDictionary::resolve_or_fail(vmSymbols::java_lang_Thread(), true, CHECK); |
duke@435 | 434 | instanceKlassHandle klass (THREAD, k); |
duke@435 | 435 | instanceHandle thread_oop = klass->allocate_instance_handle(CHECK); |
duke@435 | 436 | |
duke@435 | 437 | const char thread_name[] = "Attach Listener"; |
duke@435 | 438 | Handle string = java_lang_String::create_from_str(thread_name, CHECK); |
duke@435 | 439 | |
duke@435 | 440 | // Initialize thread_oop to put it into the system threadGroup |
duke@435 | 441 | Handle thread_group (THREAD, Universe::system_thread_group()); |
duke@435 | 442 | JavaValue result(T_VOID); |
duke@435 | 443 | JavaCalls::call_special(&result, thread_oop, |
duke@435 | 444 | klass, |
coleenp@2497 | 445 | vmSymbols::object_initializer_name(), |
coleenp@2497 | 446 | vmSymbols::threadgroup_string_void_signature(), |
duke@435 | 447 | thread_group, |
duke@435 | 448 | string, |
duke@435 | 449 | CHECK); |
duke@435 | 450 | |
never@1577 | 451 | KlassHandle group(THREAD, SystemDictionary::ThreadGroup_klass()); |
duke@435 | 452 | JavaCalls::call_special(&result, |
duke@435 | 453 | thread_group, |
duke@435 | 454 | group, |
coleenp@2497 | 455 | vmSymbols::add_method_name(), |
coleenp@2497 | 456 | vmSymbols::thread_void_signature(), |
duke@435 | 457 | thread_oop, // ARG 1 |
duke@435 | 458 | CHECK); |
duke@435 | 459 | |
duke@435 | 460 | { MutexLocker mu(Threads_lock); |
duke@435 | 461 | JavaThread* listener_thread = new JavaThread(&attach_listener_thread_entry); |
duke@435 | 462 | |
duke@435 | 463 | // Check that thread and osthread were created |
duke@435 | 464 | if (listener_thread == NULL || listener_thread->osthread() == NULL) { |
duke@435 | 465 | vm_exit_during_initialization("java.lang.OutOfMemoryError", |
duke@435 | 466 | "unable to create new native thread"); |
duke@435 | 467 | } |
duke@435 | 468 | |
duke@435 | 469 | java_lang_Thread::set_thread(thread_oop(), listener_thread); |
duke@435 | 470 | java_lang_Thread::set_daemon(thread_oop()); |
duke@435 | 471 | |
duke@435 | 472 | listener_thread->set_threadObj(thread_oop()); |
duke@435 | 473 | Threads::add(listener_thread); |
duke@435 | 474 | Thread::start(listener_thread); |
duke@435 | 475 | } |
duke@435 | 476 | } |
duke@435 | 477 | |
duke@435 | 478 | // Performs clean-up tasks on platforms where we can detect that the last |
duke@435 | 479 | // client has detached |
duke@435 | 480 | void AttachListener::detachall() { |
duke@435 | 481 | // call the platform dependent clean-up |
duke@435 | 482 | pd_detachall(); |
duke@435 | 483 | } |