Mercurial > hg > truffle
annotate src/share/vm/services/attachListener.cpp @ 1972:f95d63e2154a
6989984: Use standard include model for Hospot
Summary: Replaced MakeDeps and the includeDB files with more standardized solutions.
Reviewed-by: coleenp, kvn, kamg
| author | stefank |
|---|---|
| date | Tue, 23 Nov 2010 13:22:55 -0800 |
| parents | c18cbe5936b8 |
| children | 3582bf76420e |
| rev | line source |
|---|---|
| 0 | 1 /* |
| 1972 | 2 * Copyright (c) 2005, 2010, 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 #include "precompiled.hpp" |
| 26 #include "classfile/javaClasses.hpp" | |
| 27 #include "classfile/systemDictionary.hpp" | |
| 28 #include "gc_implementation/shared/vmGCOperations.hpp" | |
| 29 #include "memory/resourceArea.hpp" | |
| 30 #include "prims/jvmtiExport.hpp" | |
| 31 #include "runtime/arguments.hpp" | |
| 32 #include "runtime/globals.hpp" | |
| 33 #include "runtime/java.hpp" | |
| 34 #include "runtime/javaCalls.hpp" | |
| 35 #include "runtime/os.hpp" | |
| 36 #include "services/attachListener.hpp" | |
| 37 #include "services/heapDumper.hpp" | |
| 0 | 38 |
| 39 volatile bool AttachListener::_initialized; | |
| 40 | |
| 41 // Implementation of "properties" command. | |
| 42 // | |
| 43 // Invokes sun.misc.VMSupport.serializePropertiesToByteArray to serialize | |
| 44 // the system properties into a byte array. | |
| 45 | |
| 46 static klassOop load_and_initialize_klass(symbolHandle sh, TRAPS) { | |
| 47 klassOop k = SystemDictionary::resolve_or_fail(sh, true, CHECK_NULL); | |
| 48 instanceKlassHandle ik (THREAD, k); | |
| 49 if (ik->should_be_initialized()) { | |
| 50 ik->initialize(CHECK_NULL); | |
| 51 } | |
| 52 return ik(); | |
| 53 } | |
| 54 | |
| 55 static jint get_properties(AttachOperation* op, outputStream* out, symbolHandle serializePropertiesMethod) { | |
| 56 Thread* THREAD = Thread::current(); | |
| 57 HandleMark hm; | |
| 58 | |
| 59 // load sun.misc.VMSupport | |
| 60 symbolHandle klass = vmSymbolHandles::sun_misc_VMSupport(); | |
| 61 klassOop k = load_and_initialize_klass(klass, THREAD); | |
| 62 if (HAS_PENDING_EXCEPTION) { | |
| 63 java_lang_Throwable::print(PENDING_EXCEPTION, out); | |
| 64 CLEAR_PENDING_EXCEPTION; | |
| 65 return JNI_ERR; | |
| 66 } | |
| 67 instanceKlassHandle ik(THREAD, k); | |
| 68 | |
| 69 // invoke the serializePropertiesToByteArray method | |
| 70 JavaValue result(T_OBJECT); | |
| 71 JavaCallArguments args; | |
| 72 | |
| 73 | |
| 74 symbolHandle signature = vmSymbolHandles::serializePropertiesToByteArray_signature(); | |
| 75 JavaCalls::call_static(&result, | |
| 76 ik, | |
| 77 serializePropertiesMethod, | |
| 78 signature, | |
| 79 &args, | |
| 80 THREAD); | |
| 81 if (HAS_PENDING_EXCEPTION) { | |
| 82 java_lang_Throwable::print(PENDING_EXCEPTION, out); | |
| 83 CLEAR_PENDING_EXCEPTION; | |
| 84 return JNI_ERR; | |
| 85 } | |
| 86 | |
| 87 // The result should be a [B | |
| 88 oop res = (oop)result.get_jobject(); | |
| 89 assert(res->is_typeArray(), "just checking"); | |
| 90 assert(typeArrayKlass::cast(res->klass())->element_type() == T_BYTE, "just checking"); | |
| 91 | |
| 92 // copy the bytes to the output stream | |
| 93 typeArrayOop ba = typeArrayOop(res); | |
| 94 jbyte* addr = typeArrayOop(res)->byte_at_addr(0); | |
| 95 out->print_raw((const char*)addr, ba->length()); | |
| 96 | |
| 97 return JNI_OK; | |
| 98 } | |
| 99 | |
| 100 // Implementation of "properties" command. | |
| 101 static jint get_system_properties(AttachOperation* op, outputStream* out) { | |
| 102 return get_properties(op, out, vmSymbolHandles::serializePropertiesToByteArray_name()); | |
| 103 } | |
| 104 | |
| 105 // Implementation of "agent_properties" command. | |
| 106 static jint get_agent_properties(AttachOperation* op, outputStream* out) { | |
| 107 return get_properties(op, out, vmSymbolHandles::serializeAgentPropertiesToByteArray_name()); | |
| 108 } | |
| 109 | |
| 110 // Implementation of "datadump" command. | |
| 111 // | |
| 112 // Raises a SIGBREAK signal so that VM dump threads, does deadlock detection, | |
| 113 // etc. In theory this command should only post a DataDumpRequest to any | |
| 114 // JVMTI environment that has enabled this event. However it's useful to | |
| 115 // trigger the SIGBREAK handler. | |
| 116 | |
| 117 static jint data_dump(AttachOperation* op, outputStream* out) { | |
| 118 if (!ReduceSignalUsage) { | |
| 119 AttachListener::pd_data_dump(); | |
| 120 } else { | |
| 121 if (JvmtiExport::should_post_data_dump()) { | |
| 122 JvmtiExport::post_data_dump(); | |
| 123 } | |
| 124 } | |
| 125 return JNI_OK; | |
| 126 } | |
| 127 | |
| 128 // Implementation of "threaddump" command - essentially a remote ctrl-break | |
| 129 // | |
| 130 static jint thread_dump(AttachOperation* op, outputStream* out) { | |
| 131 bool print_concurrent_locks = false; | |
| 132 if (op->arg(0) != NULL && strcmp(op->arg(0), "-l") == 0) { | |
| 133 print_concurrent_locks = true; | |
| 134 } | |
| 135 | |
| 136 // thread stacks | |
| 137 VM_PrintThreads op1(out, print_concurrent_locks); | |
| 138 VMThread::execute(&op1); | |
| 139 | |
| 140 // JNI global handles | |
| 141 VM_PrintJNI op2(out); | |
| 142 VMThread::execute(&op2); | |
| 143 | |
| 144 // Deadlock detection | |
| 145 VM_FindDeadlocks op3(out); | |
| 146 VMThread::execute(&op3); | |
| 147 | |
| 148 return JNI_OK; | |
| 149 } | |
| 150 | |
| 151 #ifndef SERVICES_KERNEL // Heap dumping not supported | |
| 152 // Implementation of "dumpheap" command. | |
| 153 // | |
| 154 // Input arguments :- | |
| 155 // arg0: Name of the dump file | |
| 156 // arg1: "-live" or "-all" | |
| 157 jint dump_heap(AttachOperation* op, outputStream* out) { | |
| 158 const char* path = op->arg(0); | |
| 159 if (path == NULL || path[0] == '\0') { | |
| 160 out->print_cr("No dump file specified"); | |
| 161 } else { | |
| 162 bool live_objects_only = true; // default is true to retain the behavior before this change is made | |
| 163 const char* arg1 = op->arg(1); | |
| 164 if (arg1 != NULL && (strlen(arg1) > 0)) { | |
| 165 if (strcmp(arg1, "-all") != 0 && strcmp(arg1, "-live") != 0) { | |
| 166 out->print_cr("Invalid argument to dumpheap operation: %s", arg1); | |
| 167 return JNI_ERR; | |
| 168 } | |
| 169 live_objects_only = strcmp(arg1, "-live") == 0; | |
| 170 } | |
| 171 | |
| 172 // Request a full GC before heap dump if live_objects_only = true | |
| 173 // This helps reduces the amount of unreachable objects in the dump | |
| 174 // and makes it easier to browse. | |
| 175 HeapDumper dumper(live_objects_only /* request GC */); | |
| 176 int res = dumper.dump(op->arg(0)); | |
| 177 if (res == 0) { | |
| 178 out->print_cr("Heap dump file created"); | |
| 179 } else { | |
| 180 // heap dump failed | |
| 181 ResourceMark rm; | |
| 182 char* error = dumper.error_as_C_string(); | |
| 183 if (error == NULL) { | |
| 184 out->print_cr("Dump failed - reason unknown"); | |
| 185 } else { | |
| 186 out->print_cr("%s", error); | |
| 187 } | |
| 188 } | |
| 189 } | |
| 190 return JNI_OK; | |
| 191 } | |
| 192 #endif // SERVICES_KERNEL | |
| 193 | |
| 194 // Implementation of "inspectheap" command | |
| 195 // | |
| 196 // Input arguments :- | |
| 197 // arg0: "-live" or "-all" | |
| 198 static jint heap_inspection(AttachOperation* op, outputStream* out) { | |
| 199 bool live_objects_only = true; // default is true to retain the behavior before this change is made | |
| 200 const char* arg0 = op->arg(0); | |
| 201 if (arg0 != NULL && (strlen(arg0) > 0)) { | |
| 202 if (strcmp(arg0, "-all") != 0 && strcmp(arg0, "-live") != 0) { | |
| 203 out->print_cr("Invalid argument to inspectheap operation: %s", arg0); | |
| 204 return JNI_ERR; | |
| 205 } | |
| 206 live_objects_only = strcmp(arg0, "-live") == 0; | |
| 207 } | |
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208 VM_GC_HeapInspection heapop(out, live_objects_only /* request full gc */, true /* need_prologue */); |
| 0 | 209 VMThread::execute(&heapop); |
| 210 return JNI_OK; | |
| 211 } | |
| 212 | |
| 213 // set a boolean global flag using value from AttachOperation | |
| 214 static jint set_bool_flag(const char* name, AttachOperation* op, outputStream* out) { | |
| 215 bool value = true; | |
| 216 const char* arg1; | |
| 217 if ((arg1 = op->arg(1)) != NULL) { | |
| 218 int tmp; | |
| 219 int n = sscanf(arg1, "%d", &tmp); | |
| 220 if (n != 1) { | |
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221 out->print_cr("flag value must be a boolean (1 or 0)"); |
| 0 | 222 return JNI_ERR; |
| 223 } | |
| 224 value = (tmp != 0); | |
| 225 } | |
| 226 bool res = CommandLineFlags::boolAtPut((char*)name, &value, ATTACH_ON_DEMAND); | |
| 227 if (! res) { | |
| 228 out->print_cr("setting flag %s failed", name); | |
| 229 } | |
| 230 return res? JNI_OK : JNI_ERR; | |
| 231 } | |
| 232 | |
| 233 // set a intx global flag using value from AttachOperation | |
| 234 static jint set_intx_flag(const char* name, AttachOperation* op, outputStream* out) { | |
| 235 intx value; | |
| 236 const char* arg1; | |
| 237 if ((arg1 = op->arg(1)) != NULL) { | |
| 238 int n = sscanf(arg1, INTX_FORMAT, &value); | |
| 239 if (n != 1) { | |
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240 out->print_cr("flag value must be an integer"); |
| 0 | 241 return JNI_ERR; |
| 242 } | |
| 243 } | |
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244 bool res = CommandLineFlags::intxAtPut((char*)name, &value, ATTACH_ON_DEMAND); |
| 0 | 245 if (! res) { |
| 246 out->print_cr("setting flag %s failed", name); | |
| 247 } | |
| 248 | |
| 249 return res? JNI_OK : JNI_ERR; | |
| 250 } | |
| 251 | |
| 252 // set a uintx global flag using value from AttachOperation | |
| 253 static jint set_uintx_flag(const char* name, AttachOperation* op, outputStream* out) { | |
| 254 uintx value; | |
| 255 const char* arg1; | |
| 256 if ((arg1 = op->arg(1)) != NULL) { | |
| 257 int n = sscanf(arg1, UINTX_FORMAT, &value); | |
| 258 if (n != 1) { | |
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259 out->print_cr("flag value must be an unsigned integer"); |
| 0 | 260 return JNI_ERR; |
| 261 } | |
| 262 } | |
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263 bool res = CommandLineFlags::uintxAtPut((char*)name, &value, ATTACH_ON_DEMAND); |
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264 if (! res) { |
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265 out->print_cr("setting flag %s failed", name); |
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266 } |
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267 |
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268 return res? JNI_OK : JNI_ERR; |
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269 } |
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270 |
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271 // set a uint64_t global flag using value from AttachOperation |
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272 static jint set_uint64_t_flag(const char* name, AttachOperation* op, outputStream* out) { |
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273 uint64_t value; |
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274 const char* arg1; |
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275 if ((arg1 = op->arg(1)) != NULL) { |
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276 int n = sscanf(arg1, UINT64_FORMAT, &value); |
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277 if (n != 1) { |
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278 out->print_cr("flag value must be an unsigned 64-bit integer"); |
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279 return JNI_ERR; |
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280 } |
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281 } |
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282 bool res = CommandLineFlags::uint64_tAtPut((char*)name, &value, ATTACH_ON_DEMAND); |
| 0 | 283 if (! res) { |
| 284 out->print_cr("setting flag %s failed", name); | |
| 285 } | |
| 286 | |
| 287 return res? JNI_OK : JNI_ERR; | |
| 288 } | |
| 289 | |
| 290 // set a string global flag using value from AttachOperation | |
| 291 static jint set_ccstr_flag(const char* name, AttachOperation* op, outputStream* out) { | |
| 292 const char* value; | |
| 293 if ((value = op->arg(1)) == NULL) { | |
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294 out->print_cr("flag value must be a string"); |
| 0 | 295 return JNI_ERR; |
| 296 } | |
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297 bool res = CommandLineFlags::ccstrAtPut((char*)name, &value, ATTACH_ON_DEMAND); |
| 0 | 298 if (res) { |
| 299 FREE_C_HEAP_ARRAY(char, value); | |
| 300 } else { | |
| 301 out->print_cr("setting flag %s failed", name); | |
| 302 } | |
| 303 | |
| 304 return res? JNI_OK : JNI_ERR; | |
| 305 } | |
| 306 | |
| 307 // Implementation of "setflag" command | |
| 308 static jint set_flag(AttachOperation* op, outputStream* out) { | |
| 309 | |
| 310 const char* name = NULL; | |
| 311 if ((name = op->arg(0)) == NULL) { | |
| 312 out->print_cr("flag name is missing"); | |
| 313 return JNI_ERR; | |
| 314 } | |
| 315 | |
| 316 Flag* f = Flag::find_flag((char*)name, strlen(name)); | |
| 317 if (f && f->is_external() && f->is_writeable()) { | |
| 318 if (f->is_bool()) { | |
| 319 return set_bool_flag(name, op, out); | |
| 320 } else if (f->is_intx()) { | |
| 321 return set_intx_flag(name, op, out); | |
| 322 } else if (f->is_uintx()) { | |
| 323 return set_uintx_flag(name, op, out); | |
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324 } else if (f->is_uint64_t()) { |
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325 return set_uint64_t_flag(name, op, out); |
| 0 | 326 } else if (f->is_ccstr()) { |
| 327 return set_ccstr_flag(name, op, out); | |
| 328 } else { | |
| 329 ShouldNotReachHere(); | |
| 330 return JNI_ERR; | |
| 331 } | |
| 332 } else { | |
| 333 return AttachListener::pd_set_flag(op, out); | |
| 334 } | |
| 335 } | |
| 336 | |
| 337 // Implementation of "printflag" command | |
| 338 static jint print_flag(AttachOperation* op, outputStream* out) { | |
| 339 const char* name = NULL; | |
| 340 if ((name = op->arg(0)) == NULL) { | |
| 341 out->print_cr("flag name is missing"); | |
| 342 return JNI_ERR; | |
| 343 } | |
| 344 Flag* f = Flag::find_flag((char*)name, strlen(name)); | |
| 345 if (f) { | |
| 346 f->print_as_flag(out); | |
| 347 out->print_cr(""); | |
| 348 } else { | |
| 349 out->print_cr("no such flag '%s'", name); | |
| 350 } | |
| 351 return JNI_OK; | |
| 352 } | |
| 353 | |
| 354 // Table to map operation names to functions. | |
| 355 | |
| 356 // names must be of length <= AttachOperation::name_length_max | |
| 357 static AttachOperationFunctionInfo funcs[] = { | |
| 358 { "agentProperties", get_agent_properties }, | |
| 359 { "datadump", data_dump }, | |
| 360 #ifndef SERVICES_KERNEL | |
| 361 { "dumpheap", dump_heap }, | |
| 362 #endif // SERVICES_KERNEL | |
| 363 { "load", JvmtiExport::load_agent_library }, | |
| 364 { "properties", get_system_properties }, | |
| 365 { "threaddump", thread_dump }, | |
| 366 { "inspectheap", heap_inspection }, | |
| 367 { "setflag", set_flag }, | |
| 368 { "printflag", print_flag }, | |
| 369 { NULL, NULL } | |
| 370 }; | |
| 371 | |
| 372 | |
| 373 | |
| 374 // The Attach Listener threads services a queue. It dequeues an operation | |
| 375 // from the queue, examines the operation name (command), and dispatches | |
| 376 // to the corresponding function to perform the operation. | |
| 377 | |
| 378 static void attach_listener_thread_entry(JavaThread* thread, TRAPS) { | |
| 379 os::set_priority(thread, NearMaxPriority); | |
| 380 | |
| 381 if (AttachListener::pd_init() != 0) { | |
| 382 return; | |
| 383 } | |
| 384 AttachListener::set_initialized(); | |
| 385 | |
| 386 for (;;) { | |
| 387 AttachOperation* op = AttachListener::dequeue(); | |
| 388 if (op == NULL) { | |
| 389 return; // dequeue failed or shutdown | |
| 390 } | |
| 391 | |
| 392 ResourceMark rm; | |
| 393 bufferedStream st; | |
| 394 jint res = JNI_OK; | |
| 395 | |
| 396 // handle special detachall operation | |
| 397 if (strcmp(op->name(), AttachOperation::detachall_operation_name()) == 0) { | |
| 398 AttachListener::detachall(); | |
| 399 } else { | |
| 400 // find the function to dispatch too | |
| 401 AttachOperationFunctionInfo* info = NULL; | |
| 402 for (int i=0; funcs[i].name != NULL; i++) { | |
| 403 const char* name = funcs[i].name; | |
| 404 assert(strlen(name) <= AttachOperation::name_length_max, "operation <= name_length_max"); | |
| 405 if (strcmp(op->name(), name) == 0) { | |
| 406 info = &(funcs[i]); | |
| 407 break; | |
| 408 } | |
| 409 } | |
| 410 | |
| 411 // check for platform dependent attach operation | |
| 412 if (info == NULL) { | |
| 413 info = AttachListener::pd_find_operation(op->name()); | |
| 414 } | |
| 415 | |
| 416 if (info != NULL) { | |
| 417 // dispatch to the function that implements this operation | |
| 418 res = (info->func)(op, &st); | |
| 419 } else { | |
| 420 st.print("Operation %s not recognized!", op->name()); | |
| 421 res = JNI_ERR; | |
| 422 } | |
| 423 } | |
| 424 | |
| 425 // operation complete - send result and output to client | |
| 426 op->complete(res, &st); | |
| 427 } | |
| 428 } | |
| 429 | |
| 430 // Starts the Attach Listener thread | |
| 431 void AttachListener::init() { | |
| 432 EXCEPTION_MARK; | |
| 433 klassOop k = SystemDictionary::resolve_or_fail(vmSymbolHandles::java_lang_Thread(), true, CHECK); | |
| 434 instanceKlassHandle klass (THREAD, k); | |
| 435 instanceHandle thread_oop = klass->allocate_instance_handle(CHECK); | |
| 436 | |
| 437 const char thread_name[] = "Attach Listener"; | |
| 438 Handle string = java_lang_String::create_from_str(thread_name, CHECK); | |
| 439 | |
| 440 // Initialize thread_oop to put it into the system threadGroup | |
| 441 Handle thread_group (THREAD, Universe::system_thread_group()); | |
| 442 JavaValue result(T_VOID); | |
| 443 JavaCalls::call_special(&result, thread_oop, | |
| 444 klass, | |
| 445 vmSymbolHandles::object_initializer_name(), | |
| 446 vmSymbolHandles::threadgroup_string_void_signature(), | |
| 447 thread_group, | |
| 448 string, | |
| 449 CHECK); | |
| 450 | |
| 1142 | 451 KlassHandle group(THREAD, SystemDictionary::ThreadGroup_klass()); |
| 0 | 452 JavaCalls::call_special(&result, |
| 453 thread_group, | |
| 454 group, | |
| 455 vmSymbolHandles::add_method_name(), | |
| 456 vmSymbolHandles::thread_void_signature(), | |
| 457 thread_oop, // ARG 1 | |
| 458 CHECK); | |
| 459 | |
| 460 { MutexLocker mu(Threads_lock); | |
| 461 JavaThread* listener_thread = new JavaThread(&attach_listener_thread_entry); | |
| 462 | |
| 463 // Check that thread and osthread were created | |
| 464 if (listener_thread == NULL || listener_thread->osthread() == NULL) { | |
| 465 vm_exit_during_initialization("java.lang.OutOfMemoryError", | |
| 466 "unable to create new native thread"); | |
| 467 } | |
| 468 | |
| 469 java_lang_Thread::set_thread(thread_oop(), listener_thread); | |
| 470 java_lang_Thread::set_daemon(thread_oop()); | |
| 471 | |
| 472 listener_thread->set_threadObj(thread_oop()); | |
| 473 Threads::add(listener_thread); | |
| 474 Thread::start(listener_thread); | |
| 475 } | |
| 476 } | |
| 477 | |
| 478 // Performs clean-up tasks on platforms where we can detect that the last | |
| 479 // client has detached | |
| 480 void AttachListener::detachall() { | |
| 481 // call the platform dependent clean-up | |
| 482 pd_detachall(); | |
| 483 } |