J. Duke | 319a3b9 | 2007-12-01 00:00:00 +0000 | [diff] [blame^] | 1 | /* |
| 2 | * Copyright 1998-2006 Sun Microsystems, Inc. All Rights Reserved. |
| 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. Sun designates this |
| 8 | * particular file as subject to the "Classpath" exception as provided |
| 9 | * by Sun in the LICENSE file that accompanied this code. |
| 10 | * |
| 11 | * This code is distributed in the hope that it will be useful, but WITHOUT |
| 12 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| 13 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| 14 | * version 2 for more details (a copy is included in the LICENSE file that |
| 15 | * accompanied this code). |
| 16 | * |
| 17 | * You should have received a copy of the GNU General Public License version |
| 18 | * 2 along with this work; if not, write to the Free Software Foundation, |
| 19 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| 20 | * |
| 21 | * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, |
| 22 | * CA 95054 USA or visit www.sun.com if you need additional information or |
| 23 | * have any questions. |
| 24 | */ |
| 25 | |
| 26 | #include "util.h" |
| 27 | #include "outStream.h" |
| 28 | #include "eventHandler.h" |
| 29 | #include "threadControl.h" |
| 30 | #include "invoker.h" |
| 31 | |
| 32 | /* |
| 33 | * Event helper thread command commandKinds |
| 34 | */ |
| 35 | #define COMMAND_REPORT_EVENT_COMPOSITE 1 |
| 36 | #define COMMAND_REPORT_INVOKE_DONE 2 |
| 37 | #define COMMAND_REPORT_VM_INIT 3 |
| 38 | #define COMMAND_SUSPEND_THREAD 4 |
| 39 | |
| 40 | /* |
| 41 | * Event helper thread command singleKinds |
| 42 | */ |
| 43 | #define COMMAND_SINGLE_EVENT 11 |
| 44 | #define COMMAND_SINGLE_UNLOAD 12 |
| 45 | #define COMMAND_SINGLE_FRAME_EVENT 13 |
| 46 | |
| 47 | typedef struct EventCommandSingle { |
| 48 | jbyte suspendPolicy; /* NOTE: Must be the first field */ |
| 49 | jint id; |
| 50 | EventInfo info; |
| 51 | } EventCommandSingle; |
| 52 | |
| 53 | typedef struct UnloadCommandSingle { |
| 54 | char *classSignature; |
| 55 | jint id; |
| 56 | } UnloadCommandSingle; |
| 57 | |
| 58 | typedef struct FrameEventCommandSingle { |
| 59 | jbyte suspendPolicy; /* NOTE: Must be the first field */ |
| 60 | jint id; |
| 61 | EventIndex ei; |
| 62 | jthread thread; |
| 63 | jclass clazz; |
| 64 | jmethodID method; |
| 65 | jlocation location; |
| 66 | char typeKey; /* Not used for method entry events */ |
| 67 | /* If typeKey is 0, then no return value is needed */ |
| 68 | jvalue returnValue; /* Not used for method entry events */ |
| 69 | } FrameEventCommandSingle; |
| 70 | |
| 71 | typedef struct CommandSingle { |
| 72 | jint singleKind; |
| 73 | union { |
| 74 | EventCommandSingle eventCommand; |
| 75 | UnloadCommandSingle unloadCommand; |
| 76 | FrameEventCommandSingle frameEventCommand; |
| 77 | } u; |
| 78 | } CommandSingle; |
| 79 | |
| 80 | typedef struct ReportInvokeDoneCommand { |
| 81 | jthread thread; |
| 82 | } ReportInvokeDoneCommand; |
| 83 | |
| 84 | typedef struct ReportVMInitCommand { |
| 85 | jbyte suspendPolicy; /* NOTE: Must be the first field */ |
| 86 | jthread thread; |
| 87 | } ReportVMInitCommand; |
| 88 | |
| 89 | typedef struct SuspendThreadCommand { |
| 90 | jthread thread; |
| 91 | } SuspendThreadCommand; |
| 92 | |
| 93 | typedef struct ReportEventCompositeCommand { |
| 94 | jbyte suspendPolicy; /* NOTE: Must be the first field */ |
| 95 | jint eventCount; |
| 96 | CommandSingle singleCommand[1]; /* variable length */ |
| 97 | } ReportEventCompositeCommand; |
| 98 | |
| 99 | typedef struct HelperCommand { |
| 100 | jint commandKind; |
| 101 | jboolean done; |
| 102 | jboolean waiting; |
| 103 | jbyte sessionID; |
| 104 | struct HelperCommand *next; |
| 105 | union { |
| 106 | /* NOTE: Each of the structs below must have the same first field */ |
| 107 | ReportEventCompositeCommand reportEventComposite; |
| 108 | ReportInvokeDoneCommand reportInvokeDone; |
| 109 | ReportVMInitCommand reportVMInit; |
| 110 | SuspendThreadCommand suspendThread; |
| 111 | } u; |
| 112 | /* composite array expand out, put nothing after */ |
| 113 | } HelperCommand; |
| 114 | |
| 115 | typedef struct { |
| 116 | HelperCommand *head; |
| 117 | HelperCommand *tail; |
| 118 | } CommandQueue; |
| 119 | |
| 120 | static CommandQueue commandQueue; |
| 121 | static jrawMonitorID commandQueueLock; |
| 122 | static jrawMonitorID commandCompleteLock; |
| 123 | static jrawMonitorID blockCommandLoopLock; |
| 124 | static jint maxQueueSize = 50 * 1024; /* TO DO: Make this configurable */ |
| 125 | static jboolean holdEvents; |
| 126 | static jint currentQueueSize = 0; |
| 127 | static jint currentSessionID; |
| 128 | |
| 129 | static void saveEventInfoRefs(JNIEnv *env, EventInfo *evinfo); |
| 130 | static void tossEventInfoRefs(JNIEnv *env, EventInfo *evinfo); |
| 131 | |
| 132 | static jint |
| 133 | commandSize(HelperCommand *command) |
| 134 | { |
| 135 | jint size = sizeof(HelperCommand); |
| 136 | if (command->commandKind == COMMAND_REPORT_EVENT_COMPOSITE) { |
| 137 | /* |
| 138 | * One event is accounted for in the Helper Command. If there are |
| 139 | * more, add to size here. |
| 140 | */ |
| 141 | /*LINTED*/ |
| 142 | size += ((int)sizeof(CommandSingle) * |
| 143 | (command->u.reportEventComposite.eventCount - 1)); |
| 144 | } |
| 145 | return size; |
| 146 | } |
| 147 | |
| 148 | static void |
| 149 | freeCommand(HelperCommand *command) |
| 150 | { |
| 151 | if ( command == NULL ) |
| 152 | return; |
| 153 | jvmtiDeallocate(command); |
| 154 | } |
| 155 | |
| 156 | static void |
| 157 | enqueueCommand(HelperCommand *command, |
| 158 | jboolean wait, jboolean reportingVMDeath) |
| 159 | { |
| 160 | static jboolean vmDeathReported = JNI_FALSE; |
| 161 | CommandQueue *queue = &commandQueue; |
| 162 | jint size = commandSize(command); |
| 163 | |
| 164 | command->done = JNI_FALSE; |
| 165 | command->waiting = wait; |
| 166 | command->next = NULL; |
| 167 | |
| 168 | debugMonitorEnter(commandQueueLock); |
| 169 | while (size + currentQueueSize > maxQueueSize) { |
| 170 | debugMonitorWait(commandQueueLock); |
| 171 | } |
| 172 | log_debugee_location("enqueueCommand(): HelperCommand being processed", NULL, NULL, 0); |
| 173 | if (vmDeathReported) { |
| 174 | /* send no more events after VMDeath and don't wait */ |
| 175 | wait = JNI_FALSE; |
| 176 | } else { |
| 177 | currentQueueSize += size; |
| 178 | |
| 179 | if (queue->head == NULL) { |
| 180 | queue->head = command; |
| 181 | } else { |
| 182 | queue->tail->next = command; |
| 183 | } |
| 184 | queue->tail = command; |
| 185 | |
| 186 | if (reportingVMDeath) { |
| 187 | vmDeathReported = JNI_TRUE; |
| 188 | } |
| 189 | } |
| 190 | debugMonitorNotifyAll(commandQueueLock); |
| 191 | debugMonitorExit(commandQueueLock); |
| 192 | |
| 193 | if (wait) { |
| 194 | debugMonitorEnter(commandCompleteLock); |
| 195 | while (!command->done) { |
| 196 | log_debugee_location("enqueueCommand(): HelperCommand wait", NULL, NULL, 0); |
| 197 | debugMonitorWait(commandCompleteLock); |
| 198 | } |
| 199 | freeCommand(command); |
| 200 | debugMonitorExit(commandCompleteLock); |
| 201 | } |
| 202 | } |
| 203 | |
| 204 | static void |
| 205 | completeCommand(HelperCommand *command) |
| 206 | { |
| 207 | if (command->waiting) { |
| 208 | debugMonitorEnter(commandCompleteLock); |
| 209 | command->done = JNI_TRUE; |
| 210 | log_debugee_location("completeCommand(): HelperCommand done waiting", NULL, NULL, 0); |
| 211 | debugMonitorNotifyAll(commandCompleteLock); |
| 212 | debugMonitorExit(commandCompleteLock); |
| 213 | } else { |
| 214 | freeCommand(command); |
| 215 | } |
| 216 | } |
| 217 | |
| 218 | static HelperCommand * |
| 219 | dequeueCommand(void) |
| 220 | { |
| 221 | HelperCommand *command = NULL; |
| 222 | CommandQueue *queue = &commandQueue; |
| 223 | jint size; |
| 224 | |
| 225 | debugMonitorEnter(commandQueueLock); |
| 226 | |
| 227 | while (command == NULL) { |
| 228 | while (holdEvents || (queue->head == NULL)) { |
| 229 | debugMonitorWait(commandQueueLock); |
| 230 | } |
| 231 | |
| 232 | JDI_ASSERT(queue->head); |
| 233 | command = queue->head; |
| 234 | queue->head = command->next; |
| 235 | if (queue->tail == command) { |
| 236 | queue->tail = NULL; |
| 237 | } |
| 238 | |
| 239 | log_debugee_location("dequeueCommand(): command being dequeued", NULL, NULL, 0); |
| 240 | |
| 241 | size = commandSize(command); |
| 242 | /* |
| 243 | * Immediately close out any commands enqueued from a |
| 244 | * previously attached debugger. |
| 245 | */ |
| 246 | if (command->sessionID != currentSessionID) { |
| 247 | log_debugee_location("dequeueCommand(): command session removal", NULL, NULL, 0); |
| 248 | completeCommand(command); |
| 249 | command = NULL; |
| 250 | } |
| 251 | |
| 252 | /* |
| 253 | * There's room in the queue for more. |
| 254 | */ |
| 255 | currentQueueSize -= size; |
| 256 | debugMonitorNotifyAll(commandQueueLock); |
| 257 | } |
| 258 | |
| 259 | debugMonitorExit(commandQueueLock); |
| 260 | |
| 261 | return command; |
| 262 | } |
| 263 | |
| 264 | void eventHelper_holdEvents(void) |
| 265 | { |
| 266 | debugMonitorEnter(commandQueueLock); |
| 267 | holdEvents = JNI_TRUE; |
| 268 | debugMonitorNotifyAll(commandQueueLock); |
| 269 | debugMonitorExit(commandQueueLock); |
| 270 | } |
| 271 | |
| 272 | void eventHelper_releaseEvents(void) |
| 273 | { |
| 274 | debugMonitorEnter(commandQueueLock); |
| 275 | holdEvents = JNI_FALSE; |
| 276 | debugMonitorNotifyAll(commandQueueLock); |
| 277 | debugMonitorExit(commandQueueLock); |
| 278 | } |
| 279 | |
| 280 | static void |
| 281 | writeSingleStepEvent(JNIEnv *env, PacketOutputStream *out, EventInfo *evinfo) |
| 282 | { |
| 283 | (void)outStream_writeObjectRef(env, out, evinfo->thread); |
| 284 | writeCodeLocation(out, evinfo->clazz, evinfo->method, evinfo->location); |
| 285 | } |
| 286 | |
| 287 | static void |
| 288 | writeBreakpointEvent(JNIEnv *env, PacketOutputStream *out, EventInfo *evinfo) |
| 289 | { |
| 290 | (void)outStream_writeObjectRef(env, out, evinfo->thread); |
| 291 | writeCodeLocation(out, evinfo->clazz, evinfo->method, evinfo->location); |
| 292 | } |
| 293 | |
| 294 | static void |
| 295 | writeFieldAccessEvent(JNIEnv *env, PacketOutputStream *out, EventInfo *evinfo) |
| 296 | { |
| 297 | jbyte fieldClassTag; |
| 298 | |
| 299 | fieldClassTag = referenceTypeTag(evinfo->u.field_access.field_clazz); |
| 300 | |
| 301 | (void)outStream_writeObjectRef(env, out, evinfo->thread); |
| 302 | writeCodeLocation(out, evinfo->clazz, evinfo->method, evinfo->location); |
| 303 | (void)outStream_writeByte(out, fieldClassTag); |
| 304 | (void)outStream_writeObjectRef(env, out, evinfo->u.field_access.field_clazz); |
| 305 | (void)outStream_writeFieldID(out, evinfo->u.field_access.field); |
| 306 | (void)outStream_writeObjectTag(env, out, evinfo->object); |
| 307 | (void)outStream_writeObjectRef(env, out, evinfo->object); |
| 308 | } |
| 309 | |
| 310 | static void |
| 311 | writeFieldModificationEvent(JNIEnv *env, PacketOutputStream *out, |
| 312 | EventInfo *evinfo) |
| 313 | { |
| 314 | jbyte fieldClassTag; |
| 315 | |
| 316 | fieldClassTag = referenceTypeTag(evinfo->u.field_modification.field_clazz); |
| 317 | |
| 318 | (void)outStream_writeObjectRef(env, out, evinfo->thread); |
| 319 | writeCodeLocation(out, evinfo->clazz, evinfo->method, evinfo->location); |
| 320 | (void)outStream_writeByte(out, fieldClassTag); |
| 321 | (void)outStream_writeObjectRef(env, out, evinfo->u.field_modification.field_clazz); |
| 322 | (void)outStream_writeFieldID(out, evinfo->u.field_modification.field); |
| 323 | (void)outStream_writeObjectTag(env, out, evinfo->object); |
| 324 | (void)outStream_writeObjectRef(env, out, evinfo->object); |
| 325 | (void)outStream_writeValue(env, out, (jbyte)evinfo->u.field_modification.signature_type, |
| 326 | evinfo->u.field_modification.new_value); |
| 327 | } |
| 328 | |
| 329 | static void |
| 330 | writeExceptionEvent(JNIEnv *env, PacketOutputStream *out, EventInfo *evinfo) |
| 331 | { |
| 332 | (void)outStream_writeObjectRef(env, out, evinfo->thread); |
| 333 | writeCodeLocation(out, evinfo->clazz, evinfo->method, evinfo->location); |
| 334 | (void)outStream_writeObjectTag(env, out, evinfo->object); |
| 335 | (void)outStream_writeObjectRef(env, out, evinfo->object); |
| 336 | writeCodeLocation(out, evinfo->u.exception.catch_clazz, |
| 337 | evinfo->u.exception.catch_method, evinfo->u.exception.catch_location); |
| 338 | } |
| 339 | |
| 340 | static void |
| 341 | writeThreadEvent(JNIEnv *env, PacketOutputStream *out, EventInfo *evinfo) |
| 342 | { |
| 343 | (void)outStream_writeObjectRef(env, out, evinfo->thread); |
| 344 | } |
| 345 | |
| 346 | static void |
| 347 | writeMonitorEvent(JNIEnv *env, PacketOutputStream *out, EventInfo *evinfo) |
| 348 | { |
| 349 | jclass klass; |
| 350 | (void)outStream_writeObjectRef(env, out, evinfo->thread); |
| 351 | (void)outStream_writeObjectTag(env, out, evinfo->object); |
| 352 | (void)outStream_writeObjectRef(env, out, evinfo->object); |
| 353 | if (evinfo->ei == EI_MONITOR_WAIT || evinfo->ei == EI_MONITOR_WAITED) { |
| 354 | /* clazz of evinfo was set to class of monitor object for monitor wait event class filtering. |
| 355 | * So get the method class to write location info. |
| 356 | * See cbMonitorWait() and cbMonitorWaited() function in eventHandler.c. |
| 357 | */ |
| 358 | klass=getMethodClass(gdata->jvmti, evinfo->method); |
| 359 | writeCodeLocation(out, klass, evinfo->method, evinfo->location); |
| 360 | if (evinfo->ei == EI_MONITOR_WAIT) { |
| 361 | (void)outStream_writeLong(out, evinfo->u.monitor.timeout); |
| 362 | } else if (evinfo->ei == EI_MONITOR_WAITED) { |
| 363 | (void)outStream_writeBoolean(out, evinfo->u.monitor.timed_out); |
| 364 | } |
| 365 | /* This runs in a command loop and this thread may not return to java. |
| 366 | * So we need to delete the local ref created by jvmti GetMethodDeclaringClass. |
| 367 | */ |
| 368 | JNI_FUNC_PTR(env,DeleteLocalRef)(env, klass); |
| 369 | } else { |
| 370 | writeCodeLocation(out, evinfo->clazz, evinfo->method, evinfo->location); |
| 371 | } |
| 372 | } |
| 373 | |
| 374 | static void |
| 375 | writeClassEvent(JNIEnv *env, PacketOutputStream *out, EventInfo *evinfo) |
| 376 | { |
| 377 | jbyte classTag; |
| 378 | jint status; |
| 379 | char *signature = NULL; |
| 380 | jvmtiError error; |
| 381 | |
| 382 | classTag = referenceTypeTag(evinfo->clazz); |
| 383 | error = classSignature(evinfo->clazz, &signature, NULL); |
| 384 | if (error != JVMTI_ERROR_NONE) { |
| 385 | EXIT_ERROR(error,"signature"); |
| 386 | } |
| 387 | status = classStatus(evinfo->clazz); |
| 388 | |
| 389 | (void)outStream_writeObjectRef(env, out, evinfo->thread); |
| 390 | (void)outStream_writeByte(out, classTag); |
| 391 | (void)outStream_writeObjectRef(env, out, evinfo->clazz); |
| 392 | (void)outStream_writeString(out, signature); |
| 393 | (void)outStream_writeInt(out, map2jdwpClassStatus(status)); |
| 394 | jvmtiDeallocate(signature); |
| 395 | } |
| 396 | |
| 397 | static void |
| 398 | writeVMDeathEvent(JNIEnv *env, PacketOutputStream *out, EventInfo *evinfo) |
| 399 | { |
| 400 | } |
| 401 | |
| 402 | static void |
| 403 | handleEventCommandSingle(JNIEnv *env, PacketOutputStream *out, |
| 404 | EventCommandSingle *command) |
| 405 | { |
| 406 | EventInfo *evinfo = &command->info; |
| 407 | |
| 408 | (void)outStream_writeByte(out, eventIndex2jdwp(evinfo->ei)); |
| 409 | (void)outStream_writeInt(out, command->id); |
| 410 | |
| 411 | switch (evinfo->ei) { |
| 412 | case EI_SINGLE_STEP: |
| 413 | writeSingleStepEvent(env, out, evinfo); |
| 414 | break; |
| 415 | case EI_BREAKPOINT: |
| 416 | writeBreakpointEvent(env, out, evinfo); |
| 417 | break; |
| 418 | case EI_FIELD_ACCESS: |
| 419 | writeFieldAccessEvent(env, out, evinfo); |
| 420 | break; |
| 421 | case EI_FIELD_MODIFICATION: |
| 422 | writeFieldModificationEvent(env, out, evinfo); |
| 423 | break; |
| 424 | case EI_EXCEPTION: |
| 425 | writeExceptionEvent(env, out, evinfo); |
| 426 | break; |
| 427 | case EI_THREAD_START: |
| 428 | case EI_THREAD_END: |
| 429 | writeThreadEvent(env, out, evinfo); |
| 430 | break; |
| 431 | case EI_CLASS_LOAD: |
| 432 | case EI_CLASS_PREPARE: |
| 433 | writeClassEvent(env, out, evinfo); |
| 434 | break; |
| 435 | case EI_MONITOR_CONTENDED_ENTER: |
| 436 | case EI_MONITOR_CONTENDED_ENTERED: |
| 437 | case EI_MONITOR_WAIT: |
| 438 | case EI_MONITOR_WAITED: |
| 439 | writeMonitorEvent(env, out, evinfo); |
| 440 | break; |
| 441 | case EI_VM_DEATH: |
| 442 | writeVMDeathEvent(env, out, evinfo); |
| 443 | break; |
| 444 | default: |
| 445 | EXIT_ERROR(AGENT_ERROR_INVALID_EVENT_TYPE,"unknown event index"); |
| 446 | break; |
| 447 | } |
| 448 | tossEventInfoRefs(env, evinfo); |
| 449 | } |
| 450 | |
| 451 | static void |
| 452 | handleUnloadCommandSingle(JNIEnv* env, PacketOutputStream *out, |
| 453 | UnloadCommandSingle *command) |
| 454 | { |
| 455 | (void)outStream_writeByte(out, JDWP_EVENT(CLASS_UNLOAD)); |
| 456 | (void)outStream_writeInt(out, command->id); |
| 457 | (void)outStream_writeString(out, command->classSignature); |
| 458 | jvmtiDeallocate(command->classSignature); |
| 459 | command->classSignature = NULL; |
| 460 | } |
| 461 | |
| 462 | static void |
| 463 | handleFrameEventCommandSingle(JNIEnv* env, PacketOutputStream *out, |
| 464 | FrameEventCommandSingle *command) |
| 465 | { |
| 466 | if (command->typeKey) { |
| 467 | (void)outStream_writeByte(out, JDWP_EVENT(METHOD_EXIT_WITH_RETURN_VALUE)); |
| 468 | } else { |
| 469 | (void)outStream_writeByte(out, eventIndex2jdwp(command->ei)); |
| 470 | } |
| 471 | (void)outStream_writeInt(out, command->id); |
| 472 | (void)outStream_writeObjectRef(env, out, command->thread); |
| 473 | writeCodeLocation(out, command->clazz, command->method, command->location); |
| 474 | if (command->typeKey) { |
| 475 | (void)outStream_writeValue(env, out, command->typeKey, command->returnValue); |
| 476 | if (isObjectTag(command->typeKey) && |
| 477 | command->returnValue.l != NULL) { |
| 478 | tossGlobalRef(env, &(command->returnValue.l)); |
| 479 | } |
| 480 | } |
| 481 | tossGlobalRef(env, &(command->thread)); |
| 482 | tossGlobalRef(env, &(command->clazz)); |
| 483 | } |
| 484 | |
| 485 | static void |
| 486 | suspendWithInvokeEnabled(jbyte policy, jthread thread) |
| 487 | { |
| 488 | invoker_enableInvokeRequests(thread); |
| 489 | |
| 490 | if (policy == JDWP_SUSPEND_POLICY(ALL)) { |
| 491 | (void)threadControl_suspendAll(); |
| 492 | } else { |
| 493 | (void)threadControl_suspendThread(thread, JNI_FALSE); |
| 494 | } |
| 495 | } |
| 496 | |
| 497 | static void |
| 498 | handleReportEventCompositeCommand(JNIEnv *env, |
| 499 | ReportEventCompositeCommand *recc) |
| 500 | { |
| 501 | PacketOutputStream out; |
| 502 | jint count = recc->eventCount; |
| 503 | jint i; |
| 504 | |
| 505 | if (recc->suspendPolicy != JDWP_SUSPEND_POLICY(NONE)) { |
| 506 | /* must determine thread to interrupt before writing */ |
| 507 | /* since writing destroys it */ |
| 508 | jthread thread = NULL; |
| 509 | for (i = 0; i < count; i++) { |
| 510 | CommandSingle *single = &(recc->singleCommand[i]); |
| 511 | switch (single->singleKind) { |
| 512 | case COMMAND_SINGLE_EVENT: |
| 513 | thread = single->u.eventCommand.info.thread; |
| 514 | break; |
| 515 | case COMMAND_SINGLE_FRAME_EVENT: |
| 516 | thread = single->u.frameEventCommand.thread; |
| 517 | break; |
| 518 | } |
| 519 | if (thread != NULL) { |
| 520 | break; |
| 521 | } |
| 522 | } |
| 523 | |
| 524 | if (thread == NULL) { |
| 525 | (void)threadControl_suspendAll(); |
| 526 | } else { |
| 527 | suspendWithInvokeEnabled(recc->suspendPolicy, thread); |
| 528 | } |
| 529 | } |
| 530 | |
| 531 | outStream_initCommand(&out, uniqueID(), 0x0, |
| 532 | JDWP_COMMAND_SET(Event), |
| 533 | JDWP_COMMAND(Event, Composite)); |
| 534 | (void)outStream_writeByte(&out, recc->suspendPolicy); |
| 535 | (void)outStream_writeInt(&out, count); |
| 536 | |
| 537 | for (i = 0; i < count; i++) { |
| 538 | CommandSingle *single = &(recc->singleCommand[i]); |
| 539 | switch (single->singleKind) { |
| 540 | case COMMAND_SINGLE_EVENT: |
| 541 | handleEventCommandSingle(env, &out, |
| 542 | &single->u.eventCommand); |
| 543 | break; |
| 544 | case COMMAND_SINGLE_UNLOAD: |
| 545 | handleUnloadCommandSingle(env, &out, |
| 546 | &single->u.unloadCommand); |
| 547 | break; |
| 548 | case COMMAND_SINGLE_FRAME_EVENT: |
| 549 | handleFrameEventCommandSingle(env, &out, |
| 550 | &single->u.frameEventCommand); |
| 551 | break; |
| 552 | } |
| 553 | } |
| 554 | |
| 555 | outStream_sendCommand(&out); |
| 556 | outStream_destroy(&out); |
| 557 | } |
| 558 | |
| 559 | static void |
| 560 | handleReportInvokeDoneCommand(JNIEnv* env, ReportInvokeDoneCommand *command) |
| 561 | { |
| 562 | invoker_completeInvokeRequest(command->thread); |
| 563 | tossGlobalRef(env, &(command->thread)); |
| 564 | } |
| 565 | |
| 566 | static void |
| 567 | handleReportVMInitCommand(JNIEnv* env, ReportVMInitCommand *command) |
| 568 | { |
| 569 | PacketOutputStream out; |
| 570 | |
| 571 | if (command->suspendPolicy == JDWP_SUSPEND_POLICY(ALL)) { |
| 572 | (void)threadControl_suspendAll(); |
| 573 | } else if (command->suspendPolicy == JDWP_SUSPEND_POLICY(EVENT_THREAD)) { |
| 574 | (void)threadControl_suspendThread(command->thread, JNI_FALSE); |
| 575 | } |
| 576 | |
| 577 | outStream_initCommand(&out, uniqueID(), 0x0, |
| 578 | JDWP_COMMAND_SET(Event), |
| 579 | JDWP_COMMAND(Event, Composite)); |
| 580 | (void)outStream_writeByte(&out, command->suspendPolicy); |
| 581 | (void)outStream_writeInt(&out, 1); /* Always one component */ |
| 582 | (void)outStream_writeByte(&out, JDWP_EVENT(VM_INIT)); |
| 583 | (void)outStream_writeInt(&out, 0); /* Not in response to an event req. */ |
| 584 | |
| 585 | (void)outStream_writeObjectRef(env, &out, command->thread); |
| 586 | |
| 587 | outStream_sendCommand(&out); |
| 588 | outStream_destroy(&out); |
| 589 | /* Why aren't we tossing this: tossGlobalRef(env, &(command->thread)); */ |
| 590 | } |
| 591 | |
| 592 | static void |
| 593 | handleSuspendThreadCommand(JNIEnv* env, SuspendThreadCommand *command) |
| 594 | { |
| 595 | /* |
| 596 | * For the moment, there's nothing that can be done with the |
| 597 | * return code, so we don't check it here. |
| 598 | */ |
| 599 | (void)threadControl_suspendThread(command->thread, JNI_TRUE); |
| 600 | tossGlobalRef(env, &(command->thread)); |
| 601 | } |
| 602 | |
| 603 | static void |
| 604 | handleCommand(JNIEnv *env, HelperCommand *command) |
| 605 | { |
| 606 | switch (command->commandKind) { |
| 607 | case COMMAND_REPORT_EVENT_COMPOSITE: |
| 608 | handleReportEventCompositeCommand(env, |
| 609 | &command->u.reportEventComposite); |
| 610 | break; |
| 611 | case COMMAND_REPORT_INVOKE_DONE: |
| 612 | handleReportInvokeDoneCommand(env, &command->u.reportInvokeDone); |
| 613 | break; |
| 614 | case COMMAND_REPORT_VM_INIT: |
| 615 | handleReportVMInitCommand(env, &command->u.reportVMInit); |
| 616 | break; |
| 617 | case COMMAND_SUSPEND_THREAD: |
| 618 | handleSuspendThreadCommand(env, &command->u.suspendThread); |
| 619 | break; |
| 620 | default: |
| 621 | EXIT_ERROR(AGENT_ERROR_INVALID_EVENT_TYPE,"Event Helper Command"); |
| 622 | break; |
| 623 | } |
| 624 | } |
| 625 | |
| 626 | /* |
| 627 | * There was an assumption that only one event with a suspend-all |
| 628 | * policy could be processed by commandLoop() at one time. It was |
| 629 | * assumed that native thread suspension from the first suspend-all |
| 630 | * event would prevent the second suspend-all event from making it |
| 631 | * into the command queue. For the Classic VM, this was a reasonable |
| 632 | * assumption. However, in HotSpot all thread suspension requires a |
| 633 | * VM operation and VM operations take time. |
| 634 | * |
| 635 | * The solution is to add a mechanism to prevent commandLoop() from |
| 636 | * processing more than one event with a suspend-all policy. This is |
| 637 | * accomplished by forcing commandLoop() to wait for either |
| 638 | * ThreadReferenceImpl.c: resume() or VirtualMachineImpl.c: resume() |
| 639 | * when an event with a suspend-all policy has been completed. |
| 640 | */ |
| 641 | static jboolean blockCommandLoop = JNI_FALSE; |
| 642 | |
| 643 | /* |
| 644 | * We wait for either ThreadReferenceImpl.c: resume() or |
| 645 | * VirtualMachineImpl.c: resume() to be called. |
| 646 | */ |
| 647 | static void |
| 648 | doBlockCommandLoop(void) { |
| 649 | debugMonitorEnter(blockCommandLoopLock); |
| 650 | while (blockCommandLoop == JNI_TRUE) { |
| 651 | debugMonitorWait(blockCommandLoopLock); |
| 652 | } |
| 653 | debugMonitorExit(blockCommandLoopLock); |
| 654 | } |
| 655 | |
| 656 | /* |
| 657 | * If the command that we are about to execute has a suspend-all |
| 658 | * policy, then prepare for either ThreadReferenceImpl.c: resume() |
| 659 | * or VirtualMachineImpl.c: resume() to be called. |
| 660 | */ |
| 661 | static jboolean |
| 662 | needBlockCommandLoop(HelperCommand *cmd) { |
| 663 | if (cmd->commandKind == COMMAND_REPORT_EVENT_COMPOSITE |
| 664 | && cmd->u.reportEventComposite.suspendPolicy == JDWP_SUSPEND_POLICY(ALL)) { |
| 665 | debugMonitorEnter(blockCommandLoopLock); |
| 666 | blockCommandLoop = JNI_TRUE; |
| 667 | debugMonitorExit(blockCommandLoopLock); |
| 668 | |
| 669 | return JNI_TRUE; |
| 670 | } |
| 671 | |
| 672 | return JNI_FALSE; |
| 673 | } |
| 674 | |
| 675 | /* |
| 676 | * Used by either ThreadReferenceImpl.c: resume() or |
| 677 | * VirtualMachineImpl.c: resume() to resume commandLoop(). |
| 678 | */ |
| 679 | void |
| 680 | unblockCommandLoop(void) { |
| 681 | debugMonitorEnter(blockCommandLoopLock); |
| 682 | blockCommandLoop = JNI_FALSE; |
| 683 | debugMonitorNotifyAll(blockCommandLoopLock); |
| 684 | debugMonitorExit(blockCommandLoopLock); |
| 685 | } |
| 686 | |
| 687 | /* |
| 688 | * The event helper thread. Dequeues commands and processes them. |
| 689 | */ |
| 690 | static void JNICALL |
| 691 | commandLoop(jvmtiEnv* jvmti_env, JNIEnv* jni_env, void* arg) |
| 692 | { |
| 693 | LOG_MISC(("Begin command loop thread")); |
| 694 | |
| 695 | while (JNI_TRUE) { |
| 696 | HelperCommand *command = dequeueCommand(); |
| 697 | if (command != NULL) { |
| 698 | /* |
| 699 | * Setup for a potential doBlockCommand() call before calling |
| 700 | * handleCommand() to prevent any races. |
| 701 | */ |
| 702 | jboolean doBlock = needBlockCommandLoop(command); |
| 703 | log_debugee_location("commandLoop(): command being handled", NULL, NULL, 0); |
| 704 | handleCommand(jni_env, command); |
| 705 | completeCommand(command); |
| 706 | /* if we just finished a suspend-all cmd, then we block here */ |
| 707 | if (doBlock) { |
| 708 | doBlockCommandLoop(); |
| 709 | } |
| 710 | } |
| 711 | } |
| 712 | /* This loop never ends, even as connections come and go with server=y */ |
| 713 | } |
| 714 | |
| 715 | void |
| 716 | eventHelper_initialize(jbyte sessionID) |
| 717 | { |
| 718 | jvmtiStartFunction func; |
| 719 | |
| 720 | currentSessionID = sessionID; |
| 721 | holdEvents = JNI_FALSE; |
| 722 | commandQueue.head = NULL; |
| 723 | commandQueue.tail = NULL; |
| 724 | |
| 725 | commandQueueLock = debugMonitorCreate("JDWP Event Helper Queue Monitor"); |
| 726 | commandCompleteLock = debugMonitorCreate("JDWP Event Helper Completion Monitor"); |
| 727 | blockCommandLoopLock = debugMonitorCreate("JDWP Event Block CommandLoop Monitor"); |
| 728 | |
| 729 | /* Start the event handler thread */ |
| 730 | func = &commandLoop; |
| 731 | (void)spawnNewThread(func, NULL, "JDWP Event Helper Thread"); |
| 732 | } |
| 733 | |
| 734 | void |
| 735 | eventHelper_reset(jbyte newSessionID) |
| 736 | { |
| 737 | debugMonitorEnter(commandQueueLock); |
| 738 | currentSessionID = newSessionID; |
| 739 | holdEvents = JNI_FALSE; |
| 740 | debugMonitorNotifyAll(commandQueueLock); |
| 741 | debugMonitorExit(commandQueueLock); |
| 742 | } |
| 743 | |
| 744 | /* |
| 745 | * Provide a means for threadControl to ensure that crucial locks are not |
| 746 | * held by suspended threads. |
| 747 | */ |
| 748 | void |
| 749 | eventHelper_lock(void) |
| 750 | { |
| 751 | debugMonitorEnter(commandQueueLock); |
| 752 | debugMonitorEnter(commandCompleteLock); |
| 753 | } |
| 754 | |
| 755 | void |
| 756 | eventHelper_unlock(void) |
| 757 | { |
| 758 | debugMonitorExit(commandCompleteLock); |
| 759 | debugMonitorExit(commandQueueLock); |
| 760 | } |
| 761 | |
| 762 | /* Change all references to global in the EventInfo struct */ |
| 763 | static void |
| 764 | saveEventInfoRefs(JNIEnv *env, EventInfo *evinfo) |
| 765 | { |
| 766 | jthread *pthread; |
| 767 | jclass *pclazz; |
| 768 | jobject *pobject; |
| 769 | jthread thread; |
| 770 | jclass clazz; |
| 771 | jobject object; |
| 772 | char sig; |
| 773 | |
| 774 | JNI_FUNC_PTR(env,ExceptionClear)(env); |
| 775 | |
| 776 | if ( evinfo->thread != NULL ) { |
| 777 | pthread = &(evinfo->thread); |
| 778 | thread = *pthread; |
| 779 | *pthread = NULL; |
| 780 | saveGlobalRef(env, thread, pthread); |
| 781 | } |
| 782 | if ( evinfo->clazz != NULL ) { |
| 783 | pclazz = &(evinfo->clazz); |
| 784 | clazz = *pclazz; |
| 785 | *pclazz = NULL; |
| 786 | saveGlobalRef(env, clazz, pclazz); |
| 787 | } |
| 788 | if ( evinfo->object != NULL ) { |
| 789 | pobject = &(evinfo->object); |
| 790 | object = *pobject; |
| 791 | *pobject = NULL; |
| 792 | saveGlobalRef(env, object, pobject); |
| 793 | } |
| 794 | |
| 795 | switch (evinfo->ei) { |
| 796 | case EI_FIELD_MODIFICATION: |
| 797 | if ( evinfo->u.field_modification.field_clazz != NULL ) { |
| 798 | pclazz = &(evinfo->u.field_modification.field_clazz); |
| 799 | clazz = *pclazz; |
| 800 | *pclazz = NULL; |
| 801 | saveGlobalRef(env, clazz, pclazz); |
| 802 | } |
| 803 | sig = evinfo->u.field_modification.signature_type; |
| 804 | if ((sig == JDWP_TAG(ARRAY)) || (sig == JDWP_TAG(OBJECT))) { |
| 805 | if ( evinfo->u.field_modification.new_value.l != NULL ) { |
| 806 | pobject = &(evinfo->u.field_modification.new_value.l); |
| 807 | object = *pobject; |
| 808 | *pobject = NULL; |
| 809 | saveGlobalRef(env, object, pobject); |
| 810 | } |
| 811 | } |
| 812 | break; |
| 813 | case EI_FIELD_ACCESS: |
| 814 | if ( evinfo->u.field_access.field_clazz != NULL ) { |
| 815 | pclazz = &(evinfo->u.field_access.field_clazz); |
| 816 | clazz = *pclazz; |
| 817 | *pclazz = NULL; |
| 818 | saveGlobalRef(env, clazz, pclazz); |
| 819 | } |
| 820 | break; |
| 821 | case EI_EXCEPTION: |
| 822 | if ( evinfo->u.exception.catch_clazz != NULL ) { |
| 823 | pclazz = &(evinfo->u.exception.catch_clazz); |
| 824 | clazz = *pclazz; |
| 825 | *pclazz = NULL; |
| 826 | saveGlobalRef(env, clazz, pclazz); |
| 827 | } |
| 828 | break; |
| 829 | default: |
| 830 | break; |
| 831 | } |
| 832 | |
| 833 | if (JNI_FUNC_PTR(env,ExceptionOccurred)(env)) { |
| 834 | EXIT_ERROR(AGENT_ERROR_INVALID_EVENT_TYPE,"ExceptionOccurred"); |
| 835 | } |
| 836 | } |
| 837 | |
| 838 | static void |
| 839 | tossEventInfoRefs(JNIEnv *env, EventInfo *evinfo) |
| 840 | { |
| 841 | char sig; |
| 842 | if ( evinfo->thread != NULL ) { |
| 843 | tossGlobalRef(env, &(evinfo->thread)); |
| 844 | } |
| 845 | if ( evinfo->clazz != NULL ) { |
| 846 | tossGlobalRef(env, &(evinfo->clazz)); |
| 847 | } |
| 848 | if ( evinfo->object != NULL ) { |
| 849 | tossGlobalRef(env, &(evinfo->object)); |
| 850 | } |
| 851 | switch (evinfo->ei) { |
| 852 | case EI_FIELD_MODIFICATION: |
| 853 | if ( evinfo->u.field_modification.field_clazz != NULL ) { |
| 854 | tossGlobalRef(env, &(evinfo->u.field_modification.field_clazz)); |
| 855 | } |
| 856 | sig = evinfo->u.field_modification.signature_type; |
| 857 | if ((sig == JDWP_TAG(ARRAY)) || (sig == JDWP_TAG(OBJECT))) { |
| 858 | if ( evinfo->u.field_modification.new_value.l != NULL ) { |
| 859 | tossGlobalRef(env, &(evinfo->u.field_modification.new_value.l)); |
| 860 | } |
| 861 | } |
| 862 | break; |
| 863 | case EI_FIELD_ACCESS: |
| 864 | if ( evinfo->u.field_access.field_clazz != NULL ) { |
| 865 | tossGlobalRef(env, &(evinfo->u.field_access.field_clazz)); |
| 866 | } |
| 867 | break; |
| 868 | case EI_EXCEPTION: |
| 869 | if ( evinfo->u.exception.catch_clazz != NULL ) { |
| 870 | tossGlobalRef(env, &(evinfo->u.exception.catch_clazz)); |
| 871 | } |
| 872 | break; |
| 873 | default: |
| 874 | break; |
| 875 | } |
| 876 | } |
| 877 | |
| 878 | struct bag * |
| 879 | eventHelper_createEventBag(void) |
| 880 | { |
| 881 | return bagCreateBag(sizeof(CommandSingle), 5 /* events */ ); |
| 882 | } |
| 883 | |
| 884 | /* Return the combined suspend policy for the event set |
| 885 | */ |
| 886 | static jboolean |
| 887 | enumForCombinedSuspendPolicy(void *cv, void *arg) |
| 888 | { |
| 889 | CommandSingle *command = cv; |
| 890 | jbyte thisPolicy; |
| 891 | jbyte *policy = arg; |
| 892 | |
| 893 | switch(command->singleKind) { |
| 894 | case COMMAND_SINGLE_EVENT: |
| 895 | thisPolicy = command->u.eventCommand.suspendPolicy; |
| 896 | break; |
| 897 | case COMMAND_SINGLE_FRAME_EVENT: |
| 898 | thisPolicy = command->u.frameEventCommand.suspendPolicy; |
| 899 | break; |
| 900 | default: |
| 901 | thisPolicy = JDWP_SUSPEND_POLICY(NONE); |
| 902 | } |
| 903 | /* Expand running policy value if this policy demands it */ |
| 904 | if (*policy == JDWP_SUSPEND_POLICY(NONE)) { |
| 905 | *policy = thisPolicy; |
| 906 | } else if (*policy == JDWP_SUSPEND_POLICY(EVENT_THREAD)) { |
| 907 | *policy = (thisPolicy == JDWP_SUSPEND_POLICY(ALL))? |
| 908 | thisPolicy : *policy; |
| 909 | } |
| 910 | |
| 911 | /* Short circuit if we reached maximal suspend policy */ |
| 912 | if (*policy == JDWP_SUSPEND_POLICY(ALL)) { |
| 913 | return JNI_FALSE; |
| 914 | } else { |
| 915 | return JNI_TRUE; |
| 916 | } |
| 917 | } |
| 918 | |
| 919 | /* Determine whether we are reporting VM death |
| 920 | */ |
| 921 | static jboolean |
| 922 | enumForVMDeath(void *cv, void *arg) |
| 923 | { |
| 924 | CommandSingle *command = cv; |
| 925 | jboolean *reportingVMDeath = arg; |
| 926 | |
| 927 | if (command->singleKind == COMMAND_SINGLE_EVENT) { |
| 928 | if (command->u.eventCommand.info.ei == EI_VM_DEATH) { |
| 929 | *reportingVMDeath = JNI_TRUE; |
| 930 | return JNI_FALSE; |
| 931 | } |
| 932 | } |
| 933 | return JNI_TRUE; |
| 934 | } |
| 935 | |
| 936 | struct singleTracker { |
| 937 | ReportEventCompositeCommand *recc; |
| 938 | int index; |
| 939 | }; |
| 940 | |
| 941 | static jboolean |
| 942 | enumForCopyingSingles(void *command, void *tv) |
| 943 | { |
| 944 | struct singleTracker *tracker = (struct singleTracker *)tv; |
| 945 | (void)memcpy(&tracker->recc->singleCommand[tracker->index++], |
| 946 | command, |
| 947 | sizeof(CommandSingle)); |
| 948 | return JNI_TRUE; |
| 949 | } |
| 950 | |
| 951 | jbyte |
| 952 | eventHelper_reportEvents(jbyte sessionID, struct bag *eventBag) |
| 953 | { |
| 954 | int size = bagSize(eventBag); |
| 955 | jbyte suspendPolicy = JDWP_SUSPEND_POLICY(NONE); |
| 956 | jboolean reportingVMDeath = JNI_FALSE; |
| 957 | jboolean wait; |
| 958 | int command_size; |
| 959 | |
| 960 | HelperCommand *command; |
| 961 | ReportEventCompositeCommand *recc; |
| 962 | struct singleTracker tracker; |
| 963 | |
| 964 | if (size == 0) { |
| 965 | return suspendPolicy; |
| 966 | } |
| 967 | (void)bagEnumerateOver(eventBag, enumForCombinedSuspendPolicy, &suspendPolicy); |
| 968 | (void)bagEnumerateOver(eventBag, enumForVMDeath, &reportingVMDeath); |
| 969 | |
| 970 | /*LINTED*/ |
| 971 | command_size = (int)(sizeof(HelperCommand) + |
| 972 | sizeof(CommandSingle)*(size-1)); |
| 973 | command = jvmtiAllocate(command_size); |
| 974 | (void)memset(command, 0, command_size); |
| 975 | command->commandKind = COMMAND_REPORT_EVENT_COMPOSITE; |
| 976 | command->sessionID = sessionID; |
| 977 | recc = &command->u.reportEventComposite; |
| 978 | recc->suspendPolicy = suspendPolicy; |
| 979 | recc->eventCount = size; |
| 980 | tracker.recc = recc; |
| 981 | tracker.index = 0; |
| 982 | (void)bagEnumerateOver(eventBag, enumForCopyingSingles, &tracker); |
| 983 | |
| 984 | /* |
| 985 | * We must wait if this thread (the event thread) is to be |
| 986 | * suspended or if the VM is about to die. (Waiting in the latter |
| 987 | * case ensures that we get the event out before the process dies.) |
| 988 | */ |
| 989 | wait = (jboolean)((suspendPolicy != JDWP_SUSPEND_POLICY(NONE)) || |
| 990 | reportingVMDeath); |
| 991 | enqueueCommand(command, wait, reportingVMDeath); |
| 992 | return suspendPolicy; |
| 993 | } |
| 994 | |
| 995 | void |
| 996 | eventHelper_recordEvent(EventInfo *evinfo, jint id, jbyte suspendPolicy, |
| 997 | struct bag *eventBag) |
| 998 | { |
| 999 | JNIEnv *env = getEnv(); |
| 1000 | CommandSingle *command = bagAdd(eventBag); |
| 1001 | if (command == NULL) { |
| 1002 | EXIT_ERROR(AGENT_ERROR_OUT_OF_MEMORY,"badAdd(eventBag)"); |
| 1003 | } |
| 1004 | |
| 1005 | command->singleKind = COMMAND_SINGLE_EVENT; |
| 1006 | command->u.eventCommand.suspendPolicy = suspendPolicy; |
| 1007 | command->u.eventCommand.id = id; |
| 1008 | |
| 1009 | /* |
| 1010 | * Copy the event into the command so that it can be used |
| 1011 | * asynchronously by the event helper thread. |
| 1012 | */ |
| 1013 | (void)memcpy(&command->u.eventCommand.info, evinfo, sizeof(*evinfo)); |
| 1014 | saveEventInfoRefs(env, &command->u.eventCommand.info); |
| 1015 | } |
| 1016 | |
| 1017 | void |
| 1018 | eventHelper_recordClassUnload(jint id, char *signature, struct bag *eventBag) |
| 1019 | { |
| 1020 | CommandSingle *command = bagAdd(eventBag); |
| 1021 | if (command == NULL) { |
| 1022 | EXIT_ERROR(AGENT_ERROR_OUT_OF_MEMORY,"bagAdd(eventBag)"); |
| 1023 | } |
| 1024 | command->singleKind = COMMAND_SINGLE_UNLOAD; |
| 1025 | command->u.unloadCommand.id = id; |
| 1026 | command->u.unloadCommand.classSignature = signature; |
| 1027 | } |
| 1028 | |
| 1029 | void |
| 1030 | eventHelper_recordFrameEvent(jint id, jbyte suspendPolicy, EventIndex ei, |
| 1031 | jthread thread, jclass clazz, |
| 1032 | jmethodID method, jlocation location, |
| 1033 | int needReturnValue, |
| 1034 | jvalue returnValue, |
| 1035 | struct bag *eventBag) |
| 1036 | { |
| 1037 | JNIEnv *env = getEnv(); |
| 1038 | FrameEventCommandSingle *frameCommand; |
| 1039 | CommandSingle *command = bagAdd(eventBag); |
| 1040 | jvmtiError err = JVMTI_ERROR_NONE; |
| 1041 | if (command == NULL) { |
| 1042 | EXIT_ERROR(AGENT_ERROR_OUT_OF_MEMORY,"bagAdd(eventBag)"); |
| 1043 | } |
| 1044 | |
| 1045 | command->singleKind = COMMAND_SINGLE_FRAME_EVENT; |
| 1046 | frameCommand = &command->u.frameEventCommand; |
| 1047 | frameCommand->suspendPolicy = suspendPolicy; |
| 1048 | frameCommand->id = id; |
| 1049 | frameCommand->ei = ei; |
| 1050 | saveGlobalRef(env, thread, &(frameCommand->thread)); |
| 1051 | saveGlobalRef(env, clazz, &(frameCommand->clazz)); |
| 1052 | frameCommand->method = method; |
| 1053 | frameCommand->location = location; |
| 1054 | if (needReturnValue) { |
| 1055 | err = methodReturnType(method, &frameCommand->typeKey); |
| 1056 | JDI_ASSERT(err == JVMTI_ERROR_NONE); |
| 1057 | |
| 1058 | /* |
| 1059 | * V or B C D F I J S Z L <classname> ; [ ComponentType |
| 1060 | */ |
| 1061 | if (isObjectTag(frameCommand->typeKey) && |
| 1062 | returnValue.l != NULL) { |
| 1063 | saveGlobalRef(env, returnValue.l, &(frameCommand->returnValue.l)); |
| 1064 | } else { |
| 1065 | frameCommand->returnValue = returnValue; |
| 1066 | } |
| 1067 | } else { |
| 1068 | /* This is not a JDWP METHOD_EXIT_WITH_RETURN_VALUE request, |
| 1069 | * so signal this by setting typeKey = 0 which is not |
| 1070 | * a legal typekey. |
| 1071 | */ |
| 1072 | frameCommand->typeKey = 0; |
| 1073 | } |
| 1074 | } |
| 1075 | |
| 1076 | void |
| 1077 | eventHelper_reportInvokeDone(jbyte sessionID, jthread thread) |
| 1078 | { |
| 1079 | JNIEnv *env = getEnv(); |
| 1080 | HelperCommand *command = jvmtiAllocate(sizeof(*command)); |
| 1081 | if (command == NULL) { |
| 1082 | EXIT_ERROR(AGENT_ERROR_OUT_OF_MEMORY,"HelperCommand"); |
| 1083 | } |
| 1084 | (void)memset(command, 0, sizeof(*command)); |
| 1085 | command->commandKind = COMMAND_REPORT_INVOKE_DONE; |
| 1086 | command->sessionID = sessionID; |
| 1087 | saveGlobalRef(env, thread, &(command->u.reportInvokeDone.thread)); |
| 1088 | enqueueCommand(command, JNI_TRUE, JNI_FALSE); |
| 1089 | } |
| 1090 | |
| 1091 | /* |
| 1092 | * This, currently, cannot go through the normal event handling code |
| 1093 | * because the JVMTI event does not contain a thread. |
| 1094 | */ |
| 1095 | void |
| 1096 | eventHelper_reportVMInit(JNIEnv *env, jbyte sessionID, jthread thread, jbyte suspendPolicy) |
| 1097 | { |
| 1098 | HelperCommand *command = jvmtiAllocate(sizeof(*command)); |
| 1099 | if (command == NULL) { |
| 1100 | EXIT_ERROR(AGENT_ERROR_OUT_OF_MEMORY,"HelperCommmand"); |
| 1101 | } |
| 1102 | (void)memset(command, 0, sizeof(*command)); |
| 1103 | command->commandKind = COMMAND_REPORT_VM_INIT; |
| 1104 | command->sessionID = sessionID; |
| 1105 | saveGlobalRef(env, thread, &(command->u.reportVMInit.thread)); |
| 1106 | command->u.reportVMInit.suspendPolicy = suspendPolicy; |
| 1107 | enqueueCommand(command, JNI_TRUE, JNI_FALSE); |
| 1108 | } |
| 1109 | |
| 1110 | void |
| 1111 | eventHelper_suspendThread(jbyte sessionID, jthread thread) |
| 1112 | { |
| 1113 | JNIEnv *env = getEnv(); |
| 1114 | HelperCommand *command = jvmtiAllocate(sizeof(*command)); |
| 1115 | if (command == NULL) { |
| 1116 | EXIT_ERROR(AGENT_ERROR_OUT_OF_MEMORY,"HelperCommmand"); |
| 1117 | } |
| 1118 | (void)memset(command, 0, sizeof(*command)); |
| 1119 | command->commandKind = COMMAND_SUSPEND_THREAD; |
| 1120 | command->sessionID = sessionID; |
| 1121 | saveGlobalRef(env, thread, &(command->u.suspendThread.thread)); |
| 1122 | enqueueCommand(command, JNI_TRUE, JNI_FALSE); |
| 1123 | } |