J. Duke | 319a3b9 | 2007-12-01 00:00:00 +0000 | [diff] [blame^] | 1 | /* |
| 2 | * Copyright 2001-2005 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 | * eventFilter |
| 27 | * |
| 28 | * This module handles event filteration and the enabling/disabling |
| 29 | * of the corresponding events. Used for filters on JDI EventRequests |
| 30 | * and also internal requests. Our data is in a private hidden section |
| 31 | * of the HandlerNode's data. See comment for enclosing |
| 32 | * module eventHandler. |
| 33 | */ |
| 34 | |
| 35 | #include "util.h" |
| 36 | #include "eventFilter.h" |
| 37 | #include "eventFilterRestricted.h" |
| 38 | #include "eventHandlerRestricted.h" |
| 39 | #include "stepControl.h" |
| 40 | #include "threadControl.h" |
| 41 | #include "SDE.h" |
| 42 | |
| 43 | typedef struct ClassFilter { |
| 44 | jclass clazz; |
| 45 | } ClassFilter; |
| 46 | |
| 47 | typedef struct LocationFilter { |
| 48 | jclass clazz; |
| 49 | jmethodID method; |
| 50 | jlocation location; |
| 51 | } LocationFilter; |
| 52 | |
| 53 | typedef struct ThreadFilter { |
| 54 | jthread thread; |
| 55 | } ThreadFilter; |
| 56 | |
| 57 | typedef struct CountFilter { |
| 58 | jint count; |
| 59 | } CountFilter; |
| 60 | |
| 61 | typedef struct ConditionalFilter { |
| 62 | jint exprID; |
| 63 | } ConditionalFilter; |
| 64 | |
| 65 | typedef struct FieldFilter { |
| 66 | jclass clazz; |
| 67 | jfieldID field; |
| 68 | } FieldFilter; |
| 69 | |
| 70 | typedef struct ExceptionFilter { |
| 71 | jclass exception; |
| 72 | jboolean caught; |
| 73 | jboolean uncaught; |
| 74 | } ExceptionFilter; |
| 75 | |
| 76 | typedef struct InstanceFilter { |
| 77 | jobject instance; |
| 78 | } InstanceFilter; |
| 79 | |
| 80 | typedef struct StepFilter { |
| 81 | jint size; |
| 82 | jint depth; |
| 83 | jthread thread; |
| 84 | } StepFilter; |
| 85 | |
| 86 | typedef struct MatchFilter { |
| 87 | char *classPattern; |
| 88 | } MatchFilter; |
| 89 | |
| 90 | typedef struct SourceNameFilter { |
| 91 | char *sourceNamePattern; |
| 92 | } SourceNameFilter; |
| 93 | |
| 94 | typedef struct Filter_ { |
| 95 | jbyte modifier; |
| 96 | union { |
| 97 | struct ClassFilter ClassOnly; |
| 98 | struct LocationFilter LocationOnly; |
| 99 | struct ThreadFilter ThreadOnly; |
| 100 | struct CountFilter Count; |
| 101 | struct ConditionalFilter Conditional; |
| 102 | struct FieldFilter FieldOnly; |
| 103 | struct ExceptionFilter ExceptionOnly; |
| 104 | struct InstanceFilter InstanceOnly; |
| 105 | struct StepFilter Step; |
| 106 | struct MatchFilter ClassMatch; |
| 107 | struct MatchFilter ClassExclude; |
| 108 | struct SourceNameFilter SourceNameOnly; |
| 109 | } u; |
| 110 | } Filter; |
| 111 | |
| 112 | /* The filters array is allocated to the specified filterCount. |
| 113 | * Theoretically, some compiler could do range checking on this |
| 114 | * array - so, we define it to have a ludicrously large size so |
| 115 | * that this range checking won't get upset. |
| 116 | * |
| 117 | * The actual allocated number of bytes is computed using the |
| 118 | * offset of "filters" and so is not effected by this number. |
| 119 | */ |
| 120 | #define MAX_FILTERS 10000 |
| 121 | |
| 122 | typedef struct EventFilters_ { |
| 123 | jint filterCount; |
| 124 | Filter filters[MAX_FILTERS]; |
| 125 | } EventFilters; |
| 126 | |
| 127 | typedef struct EventFilterPrivate_HandlerNode_ { |
| 128 | EventHandlerRestricted_HandlerNode not_for_us; |
| 129 | EventFilters ef; |
| 130 | } EventFilterPrivate_HandlerNode; |
| 131 | |
| 132 | /** |
| 133 | * The following macros extract filter info (EventFilters) from private |
| 134 | * data at the end of a HandlerNode |
| 135 | */ |
| 136 | #define EVENT_FILTERS(node) (&(((EventFilterPrivate_HandlerNode*)(void*)node)->ef)) |
| 137 | #define FILTER_COUNT(node) (EVENT_FILTERS(node)->filterCount) |
| 138 | #define FILTERS_ARRAY(node) (EVENT_FILTERS(node)->filters) |
| 139 | #define FILTER(node,index) ((FILTERS_ARRAY(node))[index]) |
| 140 | #define NODE_EI(node) (node->ei) |
| 141 | |
| 142 | /***** filter set-up / destruction *****/ |
| 143 | |
| 144 | /** |
| 145 | * Allocate a HandlerNode. |
| 146 | * We do it because eventHandler doesn't know how big to make it. |
| 147 | */ |
| 148 | HandlerNode * |
| 149 | eventFilterRestricted_alloc(jint filterCount) |
| 150 | { |
| 151 | /*LINTED*/ |
| 152 | size_t size = offsetof(EventFilterPrivate_HandlerNode, ef) + |
| 153 | offsetof(EventFilters, filters) + |
| 154 | (filterCount * (int)sizeof(Filter)); |
| 155 | HandlerNode *node = jvmtiAllocate((jint)size); |
| 156 | |
| 157 | if (node != NULL) { |
| 158 | int i; |
| 159 | Filter *filter; |
| 160 | |
| 161 | (void)memset(node, 0, size); |
| 162 | |
| 163 | FILTER_COUNT(node) = filterCount; |
| 164 | |
| 165 | /* Initialize all modifiers |
| 166 | */ |
| 167 | for (i = 0, filter = FILTERS_ARRAY(node); |
| 168 | i < filterCount; |
| 169 | i++, filter++) { |
| 170 | filter->modifier = JDWP_REQUEST_NONE; |
| 171 | } |
| 172 | } |
| 173 | |
| 174 | return node; |
| 175 | } |
| 176 | |
| 177 | /** |
| 178 | * Free up global refs held by the filter. |
| 179 | * free things up at the JNI level if needed. |
| 180 | */ |
| 181 | static jvmtiError |
| 182 | clearFilters(HandlerNode *node) |
| 183 | { |
| 184 | JNIEnv *env = getEnv(); |
| 185 | jint i; |
| 186 | jvmtiError error = JVMTI_ERROR_NONE; |
| 187 | Filter *filter = FILTERS_ARRAY(node); |
| 188 | |
| 189 | for (i = 0; i < FILTER_COUNT(node); ++i, ++filter) { |
| 190 | switch (filter->modifier) { |
| 191 | case JDWP_REQUEST_MODIFIER(ThreadOnly): |
| 192 | if ( filter->u.ThreadOnly.thread != NULL ) { |
| 193 | tossGlobalRef(env, &(filter->u.ThreadOnly.thread)); |
| 194 | } |
| 195 | break; |
| 196 | case JDWP_REQUEST_MODIFIER(LocationOnly): |
| 197 | tossGlobalRef(env, &(filter->u.LocationOnly.clazz)); |
| 198 | break; |
| 199 | case JDWP_REQUEST_MODIFIER(FieldOnly): |
| 200 | tossGlobalRef(env, &(filter->u.FieldOnly.clazz)); |
| 201 | break; |
| 202 | case JDWP_REQUEST_MODIFIER(ExceptionOnly): |
| 203 | if ( filter->u.ExceptionOnly.exception != NULL ) { |
| 204 | tossGlobalRef(env, &(filter->u.ExceptionOnly.exception)); |
| 205 | } |
| 206 | break; |
| 207 | case JDWP_REQUEST_MODIFIER(InstanceOnly): |
| 208 | if ( filter->u.InstanceOnly.instance != NULL ) { |
| 209 | tossGlobalRef(env, &(filter->u.InstanceOnly.instance)); |
| 210 | } |
| 211 | break; |
| 212 | case JDWP_REQUEST_MODIFIER(ClassOnly): |
| 213 | tossGlobalRef(env, &(filter->u.ClassOnly.clazz)); |
| 214 | break; |
| 215 | case JDWP_REQUEST_MODIFIER(ClassMatch): |
| 216 | jvmtiDeallocate(filter->u.ClassMatch.classPattern); |
| 217 | break; |
| 218 | case JDWP_REQUEST_MODIFIER(ClassExclude): |
| 219 | jvmtiDeallocate(filter->u.ClassExclude.classPattern); |
| 220 | break; |
| 221 | case JDWP_REQUEST_MODIFIER(Step): { |
| 222 | jthread thread = filter->u.Step.thread; |
| 223 | error = stepControl_endStep(thread); |
| 224 | if (error == JVMTI_ERROR_NONE) { |
| 225 | tossGlobalRef(env, &(filter->u.Step.thread)); |
| 226 | } |
| 227 | break; |
| 228 | } |
| 229 | } |
| 230 | } |
| 231 | if (error == JVMTI_ERROR_NONE) { |
| 232 | FILTER_COUNT(node) = 0; /* blast so we don't clear again */ |
| 233 | } |
| 234 | |
| 235 | return error; |
| 236 | } |
| 237 | |
| 238 | |
| 239 | /***** filtering *****/ |
| 240 | |
| 241 | /* |
| 242 | * Match a string against a wildcard |
| 243 | * string pattern. |
| 244 | */ |
| 245 | static jboolean |
| 246 | patternStringMatch(char *classname, const char *pattern) |
| 247 | { |
| 248 | int pattLen; |
| 249 | int compLen; |
| 250 | char *start; |
| 251 | int offset; |
| 252 | |
| 253 | if ( pattern==NULL || classname==NULL ) { |
| 254 | return JNI_FALSE; |
| 255 | } |
| 256 | pattLen = (int)strlen(pattern); |
| 257 | |
| 258 | if ((pattern[0] != '*') && (pattern[pattLen-1] != '*')) { |
| 259 | /* An exact match is required when there is no *: bug 4331522 */ |
| 260 | return strcmp(pattern, classname) == 0; |
| 261 | } else { |
| 262 | compLen = pattLen - 1; |
| 263 | offset = (int)strlen(classname) - compLen; |
| 264 | if (offset < 0) { |
| 265 | return JNI_FALSE; |
| 266 | } else { |
| 267 | if (pattern[0] == '*') { |
| 268 | pattern++; |
| 269 | start = classname + offset; |
| 270 | } else { |
| 271 | start = classname; |
| 272 | } |
| 273 | return strncmp(pattern, start, compLen) == 0; |
| 274 | } |
| 275 | } |
| 276 | } |
| 277 | |
| 278 | /* Return the object instance in which the event occurred */ |
| 279 | /* Return NULL if static or if an error occurs */ |
| 280 | static jobject |
| 281 | eventInstance(EventInfo *evinfo) |
| 282 | { |
| 283 | jobject object = NULL; |
| 284 | jthread thread ; |
| 285 | jmethodID method ; |
| 286 | jint modifiers = 0; |
| 287 | jvmtiError error; |
| 288 | |
| 289 | switch (evinfo->ei) { |
| 290 | case EI_SINGLE_STEP: |
| 291 | case EI_BREAKPOINT: |
| 292 | case EI_FRAME_POP: |
| 293 | case EI_METHOD_ENTRY: |
| 294 | case EI_METHOD_EXIT: |
| 295 | case EI_EXCEPTION: |
| 296 | case EI_EXCEPTION_CATCH: |
| 297 | case EI_MONITOR_CONTENDED_ENTER: |
| 298 | case EI_MONITOR_CONTENDED_ENTERED: |
| 299 | case EI_MONITOR_WAIT: |
| 300 | case EI_MONITOR_WAITED: |
| 301 | thread = evinfo->thread; |
| 302 | method = evinfo->method; |
| 303 | break; |
| 304 | case EI_FIELD_ACCESS: |
| 305 | case EI_FIELD_MODIFICATION: |
| 306 | object = evinfo->object; |
| 307 | return object; |
| 308 | default: |
| 309 | return object; /* NULL */ |
| 310 | } |
| 311 | |
| 312 | error = methodModifiers(method, &modifiers); |
| 313 | |
| 314 | /* fail if error or static (0x8) */ |
| 315 | if (error == JVMTI_ERROR_NONE && thread!=NULL && (modifiers & 0x8) == 0) { |
| 316 | FrameNumber fnum = 0; |
| 317 | /* get slot zero object "this" */ |
| 318 | error = JVMTI_FUNC_PTR(gdata->jvmti,GetLocalObject) |
| 319 | (gdata->jvmti, thread, fnum, 0, &object); |
| 320 | if (error != JVMTI_ERROR_NONE) |
| 321 | object = NULL; |
| 322 | } |
| 323 | |
| 324 | return object; |
| 325 | } |
| 326 | |
| 327 | /* |
| 328 | * Determine if this event is interesting to this handler. |
| 329 | * Do so by checking each of the handler's filters. |
| 330 | * Return false if any of the filters fail, |
| 331 | * true if the handler wants this event. |
| 332 | * Anyone modifying this function should check |
| 333 | * eventFilterRestricted_passesUnloadFilter and |
| 334 | * eventFilter_predictFiltering as well. |
| 335 | * |
| 336 | * If shouldDelete is returned true, a count filter has expired |
| 337 | * and the corresponding node should be deleted. |
| 338 | */ |
| 339 | jboolean |
| 340 | eventFilterRestricted_passesFilter(JNIEnv *env, |
| 341 | char *classname, |
| 342 | EventInfo *evinfo, |
| 343 | HandlerNode *node, |
| 344 | jboolean *shouldDelete) |
| 345 | { |
| 346 | jthread thread; |
| 347 | jclass clazz; |
| 348 | jmethodID method; |
| 349 | Filter *filter = FILTERS_ARRAY(node); |
| 350 | int i; |
| 351 | |
| 352 | *shouldDelete = JNI_FALSE; |
| 353 | thread = evinfo->thread; |
| 354 | clazz = evinfo->clazz; |
| 355 | method = evinfo->method; |
| 356 | |
| 357 | /* |
| 358 | * Suppress most events if they happen in debug threads |
| 359 | */ |
| 360 | if ((evinfo->ei != EI_CLASS_PREPARE) && |
| 361 | (evinfo->ei != EI_GC_FINISH) && |
| 362 | (evinfo->ei != EI_CLASS_LOAD) && |
| 363 | threadControl_isDebugThread(thread)) { |
| 364 | return JNI_FALSE; |
| 365 | } |
| 366 | |
| 367 | for (i = 0; i < FILTER_COUNT(node); ++i, ++filter) { |
| 368 | switch (filter->modifier) { |
| 369 | case JDWP_REQUEST_MODIFIER(ThreadOnly): |
| 370 | if (!isSameObject(env, thread, filter->u.ThreadOnly.thread)) { |
| 371 | return JNI_FALSE; |
| 372 | } |
| 373 | break; |
| 374 | |
| 375 | case JDWP_REQUEST_MODIFIER(ClassOnly): |
| 376 | /* Class filters catch events in the specified |
| 377 | * class and any subclass/subinterface. |
| 378 | */ |
| 379 | if (!JNI_FUNC_PTR(env,IsAssignableFrom)(env, clazz, |
| 380 | filter->u.ClassOnly.clazz)) { |
| 381 | return JNI_FALSE; |
| 382 | } |
| 383 | break; |
| 384 | |
| 385 | /* This is kinda cheating assumming the event |
| 386 | * fields will be in the same locations, but it is |
| 387 | * true now. |
| 388 | */ |
| 389 | case JDWP_REQUEST_MODIFIER(LocationOnly): |
| 390 | if (evinfo->method != |
| 391 | filter->u.LocationOnly.method || |
| 392 | evinfo->location != |
| 393 | filter->u.LocationOnly.location || |
| 394 | !isSameObject(env, clazz, filter->u.LocationOnly.clazz)) { |
| 395 | return JNI_FALSE; |
| 396 | } |
| 397 | break; |
| 398 | |
| 399 | case JDWP_REQUEST_MODIFIER(FieldOnly): |
| 400 | /* Field watchpoints can be triggered from the |
| 401 | * declared class or any subclass/subinterface. |
| 402 | */ |
| 403 | if ((evinfo->u.field_access.field != |
| 404 | filter->u.FieldOnly.field) || |
| 405 | !isSameObject(env, evinfo->u.field_access.field_clazz, |
| 406 | filter->u.FieldOnly.clazz)) { |
| 407 | return JNI_FALSE; |
| 408 | } |
| 409 | break; |
| 410 | |
| 411 | case JDWP_REQUEST_MODIFIER(ExceptionOnly): |
| 412 | /* do we want caught/uncaught exceptions */ |
| 413 | if (!((evinfo->u.exception.catch_clazz == NULL)? |
| 414 | filter->u.ExceptionOnly.uncaught : |
| 415 | filter->u.ExceptionOnly.caught)) { |
| 416 | return JNI_FALSE; |
| 417 | } |
| 418 | |
| 419 | /* do we care about exception class */ |
| 420 | if (filter->u.ExceptionOnly.exception != NULL) { |
| 421 | jclass exception = evinfo->object; |
| 422 | |
| 423 | /* do we want this exception class */ |
| 424 | if (!JNI_FUNC_PTR(env,IsInstanceOf)(env, exception, |
| 425 | filter->u.ExceptionOnly.exception)) { |
| 426 | return JNI_FALSE; |
| 427 | } |
| 428 | } |
| 429 | break; |
| 430 | |
| 431 | case JDWP_REQUEST_MODIFIER(InstanceOnly): { |
| 432 | jobject eventInst = eventInstance(evinfo); |
| 433 | jobject filterInst = filter->u.InstanceOnly.instance; |
| 434 | /* if no error and doesn't match, don't pass |
| 435 | * filter |
| 436 | */ |
| 437 | if (eventInst != NULL && |
| 438 | !isSameObject(env, eventInst, filterInst)) { |
| 439 | return JNI_FALSE; |
| 440 | } |
| 441 | break; |
| 442 | } |
| 443 | case JDWP_REQUEST_MODIFIER(Count): { |
| 444 | JDI_ASSERT(filter->u.Count.count > 0); |
| 445 | if (--filter->u.Count.count > 0) { |
| 446 | return JNI_FALSE; |
| 447 | } |
| 448 | *shouldDelete = JNI_TRUE; |
| 449 | break; |
| 450 | } |
| 451 | |
| 452 | case JDWP_REQUEST_MODIFIER(Conditional): |
| 453 | /*** |
| 454 | if (... filter->u.Conditional.exprID ...) { |
| 455 | return JNI_FALSE; |
| 456 | } |
| 457 | ***/ |
| 458 | break; |
| 459 | |
| 460 | case JDWP_REQUEST_MODIFIER(ClassMatch): { |
| 461 | if (!patternStringMatch(classname, |
| 462 | filter->u.ClassMatch.classPattern)) { |
| 463 | return JNI_FALSE; |
| 464 | } |
| 465 | break; |
| 466 | } |
| 467 | |
| 468 | case JDWP_REQUEST_MODIFIER(ClassExclude): { |
| 469 | if (patternStringMatch(classname, |
| 470 | filter->u.ClassExclude.classPattern)) { |
| 471 | return JNI_FALSE; |
| 472 | } |
| 473 | break; |
| 474 | } |
| 475 | |
| 476 | case JDWP_REQUEST_MODIFIER(Step): |
| 477 | if (!isSameObject(env, thread, filter->u.Step.thread)) { |
| 478 | return JNI_FALSE; |
| 479 | } |
| 480 | if (!stepControl_handleStep(env, thread, clazz, method)) { |
| 481 | return JNI_FALSE; |
| 482 | } |
| 483 | break; |
| 484 | |
| 485 | case JDWP_REQUEST_MODIFIER(SourceNameMatch): { |
| 486 | char* desiredNamePattern = filter->u.SourceNameOnly.sourceNamePattern; |
| 487 | if (!searchAllSourceNames(env, clazz, |
| 488 | desiredNamePattern) == 1) { |
| 489 | /* The name isn't in the SDE; try the sourceName in the ref |
| 490 | * type |
| 491 | */ |
| 492 | char *sourceName = 0; |
| 493 | jvmtiError error = JVMTI_FUNC_PTR(gdata->jvmti,GetSourceFileName) |
| 494 | (gdata->jvmti, clazz, &sourceName); |
| 495 | if (error == JVMTI_ERROR_NONE) { |
| 496 | if (sourceName == 0 || !patternStringMatch(sourceName, desiredNamePattern)) { |
| 497 | /* We have no match */ |
| 498 | jvmtiDeallocate(sourceName); |
| 499 | return JNI_FALSE; |
| 500 | } |
| 501 | } |
| 502 | jvmtiDeallocate(sourceName); |
| 503 | } |
| 504 | break; |
| 505 | } |
| 506 | |
| 507 | default: |
| 508 | EXIT_ERROR(AGENT_ERROR_ILLEGAL_ARGUMENT,"Invalid filter modifier"); |
| 509 | return JNI_FALSE; |
| 510 | } |
| 511 | } |
| 512 | return JNI_TRUE; |
| 513 | } |
| 514 | |
| 515 | /* Determine if this event is interesting to this handler. Do so |
| 516 | * by checking each of the handler's filters. Return false if any |
| 517 | * of the filters fail, true if the handler wants this event. |
| 518 | * Special version of filter for unloads since they don't have an |
| 519 | * event structure or a jclass. |
| 520 | * |
| 521 | * If shouldDelete is returned true, a count filter has expired |
| 522 | * and the corresponding node should be deleted. |
| 523 | */ |
| 524 | jboolean |
| 525 | eventFilterRestricted_passesUnloadFilter(JNIEnv *env, |
| 526 | char *classname, |
| 527 | HandlerNode *node, |
| 528 | jboolean *shouldDelete) |
| 529 | { |
| 530 | Filter *filter = FILTERS_ARRAY(node); |
| 531 | int i; |
| 532 | |
| 533 | *shouldDelete = JNI_FALSE; |
| 534 | for (i = 0; i < FILTER_COUNT(node); ++i, ++filter) { |
| 535 | switch (filter->modifier) { |
| 536 | |
| 537 | case JDWP_REQUEST_MODIFIER(Count): { |
| 538 | JDI_ASSERT(filter->u.Count.count > 0); |
| 539 | if (--filter->u.Count.count > 0) { |
| 540 | return JNI_FALSE; |
| 541 | } |
| 542 | *shouldDelete = JNI_TRUE; |
| 543 | break; |
| 544 | } |
| 545 | |
| 546 | case JDWP_REQUEST_MODIFIER(ClassMatch): { |
| 547 | if (!patternStringMatch(classname, |
| 548 | filter->u.ClassMatch.classPattern)) { |
| 549 | return JNI_FALSE; |
| 550 | } |
| 551 | break; |
| 552 | } |
| 553 | |
| 554 | case JDWP_REQUEST_MODIFIER(ClassExclude): { |
| 555 | if (patternStringMatch(classname, |
| 556 | filter->u.ClassExclude.classPattern)) { |
| 557 | return JNI_FALSE; |
| 558 | } |
| 559 | break; |
| 560 | } |
| 561 | |
| 562 | default: |
| 563 | EXIT_ERROR(AGENT_ERROR_ILLEGAL_ARGUMENT,"Invalid filter modifier"); |
| 564 | return JNI_FALSE; |
| 565 | } |
| 566 | } |
| 567 | return JNI_TRUE; |
| 568 | } |
| 569 | |
| 570 | /** |
| 571 | * This function returns true only if it is certain that |
| 572 | * all events for the given node in the given stack frame will |
| 573 | * be filtered. It is used to optimize stepping. (If this |
| 574 | * function returns true the stepping algorithm does not |
| 575 | * have to step through every instruction in this stack frame; |
| 576 | * instead, it can use more efficient method entry/exit |
| 577 | * events. |
| 578 | */ |
| 579 | jboolean |
| 580 | eventFilter_predictFiltering(HandlerNode *node, jclass clazz, char *classname) |
| 581 | { |
| 582 | JNIEnv *env; |
| 583 | jboolean willBeFiltered; |
| 584 | Filter *filter; |
| 585 | jboolean done; |
| 586 | int count; |
| 587 | int i; |
| 588 | |
| 589 | willBeFiltered = JNI_FALSE; |
| 590 | env = NULL; |
| 591 | filter = FILTERS_ARRAY(node); |
| 592 | count = FILTER_COUNT(node); |
| 593 | done = JNI_FALSE; |
| 594 | |
| 595 | for (i = 0; (i < count) && (!done); ++i, ++filter) { |
| 596 | switch (filter->modifier) { |
| 597 | case JDWP_REQUEST_MODIFIER(ClassOnly): |
| 598 | if ( env==NULL ) { |
| 599 | env = getEnv(); |
| 600 | } |
| 601 | if (!JNI_FUNC_PTR(env,IsAssignableFrom)(env, clazz, |
| 602 | filter->u.ClassOnly.clazz)) { |
| 603 | willBeFiltered = JNI_TRUE; |
| 604 | done = JNI_TRUE; |
| 605 | } |
| 606 | break; |
| 607 | |
| 608 | case JDWP_REQUEST_MODIFIER(Count): { |
| 609 | /* |
| 610 | * If preceeding filters have determined that events will |
| 611 | * be filtered out, that is fine and we won't get here. |
| 612 | * However, the count must be decremented - even if |
| 613 | * subsequent filters will filter these events. We |
| 614 | * thus must end now unable to predict |
| 615 | */ |
| 616 | done = JNI_TRUE; |
| 617 | break; |
| 618 | } |
| 619 | |
| 620 | case JDWP_REQUEST_MODIFIER(ClassMatch): { |
| 621 | if (!patternStringMatch(classname, |
| 622 | filter->u.ClassMatch.classPattern)) { |
| 623 | willBeFiltered = JNI_TRUE; |
| 624 | done = JNI_TRUE; |
| 625 | } |
| 626 | break; |
| 627 | } |
| 628 | |
| 629 | case JDWP_REQUEST_MODIFIER(ClassExclude): { |
| 630 | if (patternStringMatch(classname, |
| 631 | filter->u.ClassExclude.classPattern)) { |
| 632 | willBeFiltered = JNI_TRUE; |
| 633 | done = JNI_TRUE; |
| 634 | } |
| 635 | break; |
| 636 | } |
| 637 | } |
| 638 | } |
| 639 | |
| 640 | return willBeFiltered; |
| 641 | } |
| 642 | |
| 643 | /** |
| 644 | * Determine if the given breakpoint node is in the specified class. |
| 645 | */ |
| 646 | jboolean |
| 647 | eventFilterRestricted_isBreakpointInClass(JNIEnv *env, jclass clazz, |
| 648 | HandlerNode *node) |
| 649 | { |
| 650 | Filter *filter = FILTERS_ARRAY(node); |
| 651 | int i; |
| 652 | |
| 653 | for (i = 0; i < FILTER_COUNT(node); ++i, ++filter) { |
| 654 | switch (filter->modifier) { |
| 655 | case JDWP_REQUEST_MODIFIER(LocationOnly): |
| 656 | return isSameObject(env, clazz, filter->u.LocationOnly.clazz); |
| 657 | } |
| 658 | } |
| 659 | return JNI_TRUE; /* should never come here */ |
| 660 | } |
| 661 | |
| 662 | /***** filter set-up *****/ |
| 663 | |
| 664 | jvmtiError |
| 665 | eventFilter_setConditionalFilter(HandlerNode *node, jint index, |
| 666 | jint exprID) |
| 667 | { |
| 668 | ConditionalFilter *filter = &FILTER(node, index).u.Conditional; |
| 669 | if (index >= FILTER_COUNT(node)) { |
| 670 | return AGENT_ERROR_ILLEGAL_ARGUMENT; |
| 671 | } |
| 672 | FILTER(node, index).modifier = JDWP_REQUEST_MODIFIER(Conditional); |
| 673 | filter->exprID = exprID; |
| 674 | return JVMTI_ERROR_NONE; |
| 675 | } |
| 676 | |
| 677 | jvmtiError |
| 678 | eventFilter_setCountFilter(HandlerNode *node, jint index, |
| 679 | jint count) |
| 680 | { |
| 681 | CountFilter *filter = &FILTER(node, index).u.Count; |
| 682 | if (index >= FILTER_COUNT(node)) { |
| 683 | return AGENT_ERROR_ILLEGAL_ARGUMENT; |
| 684 | } |
| 685 | if (count <= 0) { |
| 686 | return JDWP_ERROR(INVALID_COUNT); |
| 687 | } else { |
| 688 | FILTER(node, index).modifier = JDWP_REQUEST_MODIFIER(Count); |
| 689 | filter->count = count; |
| 690 | return JVMTI_ERROR_NONE; |
| 691 | } |
| 692 | } |
| 693 | |
| 694 | jvmtiError |
| 695 | eventFilter_setThreadOnlyFilter(HandlerNode *node, jint index, |
| 696 | jthread thread) |
| 697 | { |
| 698 | JNIEnv *env = getEnv(); |
| 699 | ThreadFilter *filter = &FILTER(node, index).u.ThreadOnly; |
| 700 | if (index >= FILTER_COUNT(node)) { |
| 701 | return AGENT_ERROR_ILLEGAL_ARGUMENT; |
| 702 | } |
| 703 | if (NODE_EI(node) == EI_GC_FINISH) { |
| 704 | return AGENT_ERROR_ILLEGAL_ARGUMENT; |
| 705 | } |
| 706 | |
| 707 | /* Create a thread ref that will live beyond */ |
| 708 | /* the end of this call */ |
| 709 | saveGlobalRef(env, thread, &(filter->thread)); |
| 710 | FILTER(node, index).modifier = JDWP_REQUEST_MODIFIER(ThreadOnly); |
| 711 | return JVMTI_ERROR_NONE; |
| 712 | } |
| 713 | |
| 714 | jvmtiError |
| 715 | eventFilter_setLocationOnlyFilter(HandlerNode *node, jint index, |
| 716 | jclass clazz, jmethodID method, |
| 717 | jlocation location) |
| 718 | { |
| 719 | JNIEnv *env = getEnv(); |
| 720 | LocationFilter *filter = &FILTER(node, index).u.LocationOnly; |
| 721 | if (index >= FILTER_COUNT(node)) { |
| 722 | return AGENT_ERROR_ILLEGAL_ARGUMENT; |
| 723 | } |
| 724 | if ((NODE_EI(node) != EI_BREAKPOINT) && |
| 725 | (NODE_EI(node) != EI_FIELD_ACCESS) && |
| 726 | (NODE_EI(node) != EI_FIELD_MODIFICATION) && |
| 727 | (NODE_EI(node) != EI_SINGLE_STEP) && |
| 728 | (NODE_EI(node) != EI_EXCEPTION)) { |
| 729 | |
| 730 | return AGENT_ERROR_ILLEGAL_ARGUMENT; |
| 731 | } |
| 732 | |
| 733 | /* Create a class ref that will live beyond */ |
| 734 | /* the end of this call */ |
| 735 | saveGlobalRef(env, clazz, &(filter->clazz)); |
| 736 | FILTER(node, index).modifier = JDWP_REQUEST_MODIFIER(LocationOnly); |
| 737 | filter->method = method; |
| 738 | filter->location = location; |
| 739 | return JVMTI_ERROR_NONE; |
| 740 | } |
| 741 | |
| 742 | jvmtiError |
| 743 | eventFilter_setFieldOnlyFilter(HandlerNode *node, jint index, |
| 744 | jclass clazz, jfieldID field) |
| 745 | { |
| 746 | JNIEnv *env = getEnv(); |
| 747 | FieldFilter *filter = &FILTER(node, index).u.FieldOnly; |
| 748 | if (index >= FILTER_COUNT(node)) { |
| 749 | return AGENT_ERROR_ILLEGAL_ARGUMENT; |
| 750 | } |
| 751 | if ((NODE_EI(node) != EI_FIELD_ACCESS) && |
| 752 | (NODE_EI(node) != EI_FIELD_MODIFICATION)) { |
| 753 | |
| 754 | return AGENT_ERROR_ILLEGAL_ARGUMENT; |
| 755 | } |
| 756 | |
| 757 | /* Create a class ref that will live beyond */ |
| 758 | /* the end of this call */ |
| 759 | saveGlobalRef(env, clazz, &(filter->clazz)); |
| 760 | FILTER(node, index).modifier = JDWP_REQUEST_MODIFIER(FieldOnly); |
| 761 | filter->field = field; |
| 762 | return JVMTI_ERROR_NONE; |
| 763 | } |
| 764 | |
| 765 | jvmtiError |
| 766 | eventFilter_setClassOnlyFilter(HandlerNode *node, jint index, |
| 767 | jclass clazz) |
| 768 | { |
| 769 | JNIEnv *env = getEnv(); |
| 770 | ClassFilter *filter = &FILTER(node, index).u.ClassOnly; |
| 771 | if (index >= FILTER_COUNT(node)) { |
| 772 | return AGENT_ERROR_ILLEGAL_ARGUMENT; |
| 773 | } |
| 774 | if ( |
| 775 | (NODE_EI(node) == EI_GC_FINISH) || |
| 776 | (NODE_EI(node) == EI_THREAD_START) || |
| 777 | (NODE_EI(node) == EI_THREAD_END)) { |
| 778 | |
| 779 | return AGENT_ERROR_ILLEGAL_ARGUMENT; |
| 780 | } |
| 781 | |
| 782 | /* Create a class ref that will live beyond */ |
| 783 | /* the end of this call */ |
| 784 | saveGlobalRef(env, clazz, &(filter->clazz)); |
| 785 | FILTER(node, index).modifier = JDWP_REQUEST_MODIFIER(ClassOnly); |
| 786 | return JVMTI_ERROR_NONE; |
| 787 | } |
| 788 | |
| 789 | jvmtiError |
| 790 | eventFilter_setExceptionOnlyFilter(HandlerNode *node, jint index, |
| 791 | jclass exceptionClass, |
| 792 | jboolean caught, |
| 793 | jboolean uncaught) |
| 794 | { |
| 795 | JNIEnv *env = getEnv(); |
| 796 | ExceptionFilter *filter = &FILTER(node, index).u.ExceptionOnly; |
| 797 | if (index >= FILTER_COUNT(node)) { |
| 798 | return AGENT_ERROR_ILLEGAL_ARGUMENT; |
| 799 | } |
| 800 | if (NODE_EI(node) != EI_EXCEPTION) { |
| 801 | return AGENT_ERROR_ILLEGAL_ARGUMENT; |
| 802 | } |
| 803 | |
| 804 | filter->exception = NULL; |
| 805 | if (exceptionClass != NULL) { |
| 806 | /* Create a class ref that will live beyond */ |
| 807 | /* the end of this call */ |
| 808 | saveGlobalRef(env, exceptionClass, &(filter->exception)); |
| 809 | } |
| 810 | FILTER(node, index).modifier = |
| 811 | JDWP_REQUEST_MODIFIER(ExceptionOnly); |
| 812 | filter->caught = caught; |
| 813 | filter->uncaught = uncaught; |
| 814 | return JVMTI_ERROR_NONE; |
| 815 | } |
| 816 | |
| 817 | jvmtiError |
| 818 | eventFilter_setInstanceOnlyFilter(HandlerNode *node, jint index, |
| 819 | jobject instance) |
| 820 | { |
| 821 | JNIEnv *env = getEnv(); |
| 822 | InstanceFilter *filter = &FILTER(node, index).u.InstanceOnly; |
| 823 | if (index >= FILTER_COUNT(node)) { |
| 824 | return AGENT_ERROR_ILLEGAL_ARGUMENT; |
| 825 | } |
| 826 | |
| 827 | filter->instance = NULL; |
| 828 | if (instance != NULL) { |
| 829 | /* Create an object ref that will live beyond |
| 830 | * the end of this call |
| 831 | */ |
| 832 | saveGlobalRef(env, instance, &(filter->instance)); |
| 833 | } |
| 834 | FILTER(node, index).modifier = |
| 835 | JDWP_REQUEST_MODIFIER(InstanceOnly); |
| 836 | return JVMTI_ERROR_NONE; |
| 837 | } |
| 838 | |
| 839 | jvmtiError |
| 840 | eventFilter_setClassMatchFilter(HandlerNode *node, jint index, |
| 841 | char *classPattern) |
| 842 | { |
| 843 | MatchFilter *filter = &FILTER(node, index).u.ClassMatch; |
| 844 | if (index >= FILTER_COUNT(node)) { |
| 845 | return AGENT_ERROR_ILLEGAL_ARGUMENT; |
| 846 | } |
| 847 | if ( |
| 848 | (NODE_EI(node) == EI_THREAD_START) || |
| 849 | (NODE_EI(node) == EI_THREAD_END)) { |
| 850 | |
| 851 | return AGENT_ERROR_ILLEGAL_ARGUMENT; |
| 852 | } |
| 853 | |
| 854 | FILTER(node, index).modifier = |
| 855 | JDWP_REQUEST_MODIFIER(ClassMatch); |
| 856 | filter->classPattern = classPattern; |
| 857 | return JVMTI_ERROR_NONE; |
| 858 | } |
| 859 | |
| 860 | jvmtiError |
| 861 | eventFilter_setClassExcludeFilter(HandlerNode *node, jint index, |
| 862 | char *classPattern) |
| 863 | { |
| 864 | MatchFilter *filter = &FILTER(node, index).u.ClassExclude; |
| 865 | if (index >= FILTER_COUNT(node)) { |
| 866 | return AGENT_ERROR_ILLEGAL_ARGUMENT; |
| 867 | } |
| 868 | if ( |
| 869 | (NODE_EI(node) == EI_THREAD_START) || |
| 870 | (NODE_EI(node) == EI_THREAD_END)) { |
| 871 | |
| 872 | return AGENT_ERROR_ILLEGAL_ARGUMENT; |
| 873 | } |
| 874 | |
| 875 | FILTER(node, index).modifier = |
| 876 | JDWP_REQUEST_MODIFIER(ClassExclude); |
| 877 | filter->classPattern = classPattern; |
| 878 | return JVMTI_ERROR_NONE; |
| 879 | } |
| 880 | |
| 881 | jvmtiError |
| 882 | eventFilter_setStepFilter(HandlerNode *node, jint index, |
| 883 | jthread thread, jint size, jint depth) |
| 884 | { |
| 885 | jvmtiError error; |
| 886 | JNIEnv *env = getEnv(); |
| 887 | StepFilter *filter = &FILTER(node, index).u.Step; |
| 888 | if (index >= FILTER_COUNT(node)) { |
| 889 | return AGENT_ERROR_ILLEGAL_ARGUMENT; |
| 890 | } |
| 891 | if (NODE_EI(node) != EI_SINGLE_STEP) { |
| 892 | return AGENT_ERROR_ILLEGAL_ARGUMENT; |
| 893 | } |
| 894 | |
| 895 | /* Create a thread ref that will live beyond */ |
| 896 | /* the end of this call */ |
| 897 | saveGlobalRef(env, thread, &(filter->thread)); |
| 898 | error = stepControl_beginStep(env, filter->thread, size, depth, node); |
| 899 | if (error != JVMTI_ERROR_NONE) { |
| 900 | tossGlobalRef(env, &(filter->thread)); |
| 901 | return error; |
| 902 | } |
| 903 | FILTER(node, index).modifier = JDWP_REQUEST_MODIFIER(Step); |
| 904 | filter->depth = depth; |
| 905 | filter->size = size; |
| 906 | return JVMTI_ERROR_NONE; |
| 907 | } |
| 908 | |
| 909 | |
| 910 | jvmtiError |
| 911 | eventFilter_setSourceNameMatchFilter(HandlerNode *node, |
| 912 | jint index, |
| 913 | char *sourceNamePattern) { |
| 914 | SourceNameFilter *filter = &FILTER(node, index).u.SourceNameOnly; |
| 915 | if (index >= FILTER_COUNT(node)) { |
| 916 | return AGENT_ERROR_ILLEGAL_ARGUMENT; |
| 917 | } |
| 918 | if (NODE_EI(node) != EI_CLASS_PREPARE) { |
| 919 | return AGENT_ERROR_ILLEGAL_ARGUMENT; |
| 920 | } |
| 921 | |
| 922 | FILTER(node, index).modifier = |
| 923 | JDWP_REQUEST_MODIFIER(SourceNameMatch); |
| 924 | filter->sourceNamePattern = sourceNamePattern; |
| 925 | return JVMTI_ERROR_NONE; |
| 926 | |
| 927 | } |
| 928 | |
| 929 | /***** JVMTI event enabling / disabling *****/ |
| 930 | |
| 931 | /** |
| 932 | * Return the Filter that is of the specified type (modifier). |
| 933 | * Return NULL if not found. |
| 934 | */ |
| 935 | static Filter * |
| 936 | findFilter(HandlerNode *node, jint modifier) |
| 937 | { |
| 938 | int i; |
| 939 | Filter *filter; |
| 940 | for (i = 0, filter = FILTERS_ARRAY(node); |
| 941 | i <FILTER_COUNT(node); |
| 942 | i++, filter++) { |
| 943 | if (filter->modifier == modifier) { |
| 944 | return filter; |
| 945 | } |
| 946 | } |
| 947 | return NULL; |
| 948 | } |
| 949 | |
| 950 | /** |
| 951 | * Determine if the specified breakpoint node is in the |
| 952 | * same location as the LocationFilter passed in arg. |
| 953 | * |
| 954 | * This is a match function called by a |
| 955 | * eventHandlerRestricted_iterator invokation. |
| 956 | */ |
| 957 | static jboolean |
| 958 | matchBreakpoint(JNIEnv *env, HandlerNode *node, void *arg) |
| 959 | { |
| 960 | LocationFilter *goal = (LocationFilter *)arg; |
| 961 | Filter *filter = FILTERS_ARRAY(node); |
| 962 | int i; |
| 963 | |
| 964 | for (i = 0; i < FILTER_COUNT(node); ++i, ++filter) { |
| 965 | switch (filter->modifier) { |
| 966 | case JDWP_REQUEST_MODIFIER(LocationOnly): { |
| 967 | LocationFilter *trial = &(filter->u.LocationOnly); |
| 968 | if (trial->method == goal->method && |
| 969 | trial->location == goal->location && |
| 970 | isSameObject(env, trial->clazz, goal->clazz)) { |
| 971 | return JNI_TRUE; |
| 972 | } |
| 973 | } |
| 974 | } |
| 975 | } |
| 976 | return JNI_FALSE; |
| 977 | } |
| 978 | |
| 979 | /** |
| 980 | * Set a breakpoint if this is the first one at this location. |
| 981 | */ |
| 982 | static jvmtiError |
| 983 | setBreakpoint(HandlerNode *node) |
| 984 | { |
| 985 | jvmtiError error = JVMTI_ERROR_NONE; |
| 986 | Filter *filter; |
| 987 | |
| 988 | filter = findFilter(node, JDWP_REQUEST_MODIFIER(LocationOnly)); |
| 989 | if (filter == NULL) { |
| 990 | /* bp event with no location filter */ |
| 991 | error = AGENT_ERROR_INTERNAL; |
| 992 | } else { |
| 993 | LocationFilter *lf = &(filter->u.LocationOnly); |
| 994 | |
| 995 | /* if this is the first handler for this |
| 996 | * location, set bp at JVMTI level |
| 997 | */ |
| 998 | if (!eventHandlerRestricted_iterator( |
| 999 | EI_BREAKPOINT, matchBreakpoint, lf)) { |
| 1000 | LOG_LOC(("SetBreakpoint at location: method=%p,location=%d", |
| 1001 | lf->method, (int)lf->location)); |
| 1002 | error = JVMTI_FUNC_PTR(gdata->jvmti,SetBreakpoint) |
| 1003 | (gdata->jvmti, lf->method, lf->location); |
| 1004 | } |
| 1005 | } |
| 1006 | return error; |
| 1007 | } |
| 1008 | |
| 1009 | /** |
| 1010 | * Clear a breakpoint if this is the last one at this location. |
| 1011 | */ |
| 1012 | static jvmtiError |
| 1013 | clearBreakpoint(HandlerNode *node) |
| 1014 | { |
| 1015 | jvmtiError error = JVMTI_ERROR_NONE; |
| 1016 | Filter *filter; |
| 1017 | |
| 1018 | filter = findFilter(node, JDWP_REQUEST_MODIFIER(LocationOnly)); |
| 1019 | if (filter == NULL) { |
| 1020 | /* bp event with no location filter */ |
| 1021 | error = AGENT_ERROR_INTERNAL; |
| 1022 | } else { |
| 1023 | LocationFilter *lf = &(filter->u.LocationOnly); |
| 1024 | |
| 1025 | /* if this is the last handler for this |
| 1026 | * location, clear bp at JVMTI level |
| 1027 | */ |
| 1028 | if (!eventHandlerRestricted_iterator( |
| 1029 | EI_BREAKPOINT, matchBreakpoint, lf)) { |
| 1030 | LOG_LOC(("ClearBreakpoint at location: method=%p,location=%d", |
| 1031 | lf->method, (int)lf->location)); |
| 1032 | error = JVMTI_FUNC_PTR(gdata->jvmti,ClearBreakpoint) |
| 1033 | (gdata->jvmti, lf->method, lf->location); |
| 1034 | } |
| 1035 | } |
| 1036 | return error; |
| 1037 | } |
| 1038 | |
| 1039 | /** |
| 1040 | * Return true if a breakpoint is set at the specified location. |
| 1041 | */ |
| 1042 | jboolean |
| 1043 | isBreakpointSet(jclass clazz, jmethodID method, jlocation location) |
| 1044 | { |
| 1045 | LocationFilter lf; |
| 1046 | |
| 1047 | lf.clazz = clazz; |
| 1048 | lf.method = method; |
| 1049 | lf.location = location; |
| 1050 | |
| 1051 | return eventHandlerRestricted_iterator(EI_BREAKPOINT, |
| 1052 | matchBreakpoint, &lf); |
| 1053 | } |
| 1054 | |
| 1055 | /** |
| 1056 | * Determine if the specified watchpoint node has the |
| 1057 | * same field as the FieldFilter passed in arg. |
| 1058 | * |
| 1059 | * This is a match function called by a |
| 1060 | * eventHandlerRestricted_iterator invokation. |
| 1061 | */ |
| 1062 | static jboolean |
| 1063 | matchWatchpoint(JNIEnv *env, HandlerNode *node, void *arg) |
| 1064 | { |
| 1065 | FieldFilter *goal = (FieldFilter *)arg; |
| 1066 | Filter *filter = FILTERS_ARRAY(node); |
| 1067 | int i; |
| 1068 | |
| 1069 | for (i = 0; i < FILTER_COUNT(node); ++i, ++filter) { |
| 1070 | switch (filter->modifier) { |
| 1071 | case JDWP_REQUEST_MODIFIER(FieldOnly): { |
| 1072 | FieldFilter *trial = &(filter->u.FieldOnly); |
| 1073 | if (trial->field == goal->field && |
| 1074 | isSameObject(env, trial->clazz, goal->clazz)) { |
| 1075 | return JNI_TRUE; |
| 1076 | } |
| 1077 | } |
| 1078 | } |
| 1079 | } |
| 1080 | return JNI_FALSE; |
| 1081 | } |
| 1082 | |
| 1083 | /** |
| 1084 | * Set a watchpoint if this is the first one on this field. |
| 1085 | */ |
| 1086 | static jvmtiError |
| 1087 | setWatchpoint(HandlerNode *node) |
| 1088 | { |
| 1089 | jvmtiError error = JVMTI_ERROR_NONE; |
| 1090 | Filter *filter; |
| 1091 | |
| 1092 | filter = findFilter(node, JDWP_REQUEST_MODIFIER(FieldOnly)); |
| 1093 | if (filter == NULL) { |
| 1094 | /* event with no field filter */ |
| 1095 | error = AGENT_ERROR_INTERNAL; |
| 1096 | } else { |
| 1097 | FieldFilter *ff = &(filter->u.FieldOnly); |
| 1098 | |
| 1099 | /* if this is the first handler for this |
| 1100 | * field, set wp at JVMTI level |
| 1101 | */ |
| 1102 | if (!eventHandlerRestricted_iterator( |
| 1103 | NODE_EI(node), matchWatchpoint, ff)) { |
| 1104 | error = (NODE_EI(node) == EI_FIELD_ACCESS) ? |
| 1105 | JVMTI_FUNC_PTR(gdata->jvmti,SetFieldAccessWatch) |
| 1106 | (gdata->jvmti, ff->clazz, ff->field) : |
| 1107 | JVMTI_FUNC_PTR(gdata->jvmti,SetFieldModificationWatch) |
| 1108 | (gdata->jvmti, ff->clazz, ff->field); |
| 1109 | } |
| 1110 | } |
| 1111 | return error; |
| 1112 | } |
| 1113 | |
| 1114 | /** |
| 1115 | * Clear a watchpoint if this is the last one on this field. |
| 1116 | */ |
| 1117 | static jvmtiError |
| 1118 | clearWatchpoint(HandlerNode *node) |
| 1119 | { |
| 1120 | jvmtiError error = JVMTI_ERROR_NONE; |
| 1121 | Filter *filter; |
| 1122 | |
| 1123 | filter = findFilter(node, JDWP_REQUEST_MODIFIER(FieldOnly)); |
| 1124 | if (filter == NULL) { |
| 1125 | /* event with no field filter */ |
| 1126 | error = AGENT_ERROR_INTERNAL; |
| 1127 | } else { |
| 1128 | FieldFilter *ff = &(filter->u.FieldOnly); |
| 1129 | |
| 1130 | /* if this is the last handler for this |
| 1131 | * field, clear wp at JVMTI level |
| 1132 | */ |
| 1133 | if (!eventHandlerRestricted_iterator( |
| 1134 | NODE_EI(node), matchWatchpoint, ff)) { |
| 1135 | error = (NODE_EI(node) == EI_FIELD_ACCESS) ? |
| 1136 | JVMTI_FUNC_PTR(gdata->jvmti,ClearFieldAccessWatch) |
| 1137 | (gdata->jvmti, ff->clazz, ff->field) : |
| 1138 | JVMTI_FUNC_PTR(gdata->jvmti,ClearFieldModificationWatch) |
| 1139 | (gdata->jvmti, ff->clazz, ff->field); |
| 1140 | } |
| 1141 | } |
| 1142 | return error; |
| 1143 | } |
| 1144 | |
| 1145 | /** |
| 1146 | * Determine the thread this node is filtered on. |
| 1147 | * NULL if not thread filtered. |
| 1148 | */ |
| 1149 | static jthread |
| 1150 | requestThread(HandlerNode *node) |
| 1151 | { |
| 1152 | int i; |
| 1153 | Filter *filter = FILTERS_ARRAY(node); |
| 1154 | |
| 1155 | for (i = 0; i < FILTER_COUNT(node); ++i, ++filter) { |
| 1156 | switch (filter->modifier) { |
| 1157 | case JDWP_REQUEST_MODIFIER(ThreadOnly): |
| 1158 | return filter->u.ThreadOnly.thread; |
| 1159 | } |
| 1160 | } |
| 1161 | |
| 1162 | return NULL; |
| 1163 | } |
| 1164 | |
| 1165 | /** |
| 1166 | * Determine if the specified node has a |
| 1167 | * thread filter with the thread passed in arg. |
| 1168 | * |
| 1169 | * This is a match function called by a |
| 1170 | * eventHandlerRestricted_iterator invokation. |
| 1171 | */ |
| 1172 | static jboolean |
| 1173 | matchThread(JNIEnv *env, HandlerNode *node, void *arg) |
| 1174 | { |
| 1175 | jthread goalThread = (jthread)arg; |
| 1176 | jthread reqThread = requestThread(node); |
| 1177 | |
| 1178 | /* If the event's thread and the passed thread are the same |
| 1179 | * (or both are NULL), we have a match. |
| 1180 | */ |
| 1181 | return isSameObject(env, reqThread, goalThread); |
| 1182 | } |
| 1183 | |
| 1184 | /** |
| 1185 | * Do any enabling of events (including setting breakpoints etc) |
| 1186 | * needed to get the events requested by this handler node. |
| 1187 | */ |
| 1188 | static jvmtiError |
| 1189 | enableEvents(HandlerNode *node) |
| 1190 | { |
| 1191 | jvmtiError error = JVMTI_ERROR_NONE; |
| 1192 | |
| 1193 | switch (NODE_EI(node)) { |
| 1194 | /* The stepping code directly enables/disables stepping as |
| 1195 | * necessary |
| 1196 | */ |
| 1197 | case EI_SINGLE_STEP: |
| 1198 | /* Internal thread event handlers are always present |
| 1199 | * (hardwired in the event hook), so we don't change the |
| 1200 | * notification mode here. |
| 1201 | */ |
| 1202 | case EI_THREAD_START: |
| 1203 | case EI_THREAD_END: |
| 1204 | case EI_VM_INIT: |
| 1205 | case EI_VM_DEATH: |
| 1206 | case EI_CLASS_PREPARE: |
| 1207 | case EI_GC_FINISH: |
| 1208 | return error; |
| 1209 | |
| 1210 | case EI_FIELD_ACCESS: |
| 1211 | case EI_FIELD_MODIFICATION: |
| 1212 | error = setWatchpoint(node); |
| 1213 | break; |
| 1214 | |
| 1215 | case EI_BREAKPOINT: |
| 1216 | error = setBreakpoint(node); |
| 1217 | break; |
| 1218 | |
| 1219 | default: |
| 1220 | break; |
| 1221 | } |
| 1222 | |
| 1223 | /* Don't globally enable if the above failed */ |
| 1224 | if (error == JVMTI_ERROR_NONE) { |
| 1225 | jthread thread = requestThread(node); |
| 1226 | |
| 1227 | /* If this is the first request of it's kind on this |
| 1228 | * thread (or all threads (thread == NULL)) then enable |
| 1229 | * these events on this thread. |
| 1230 | */ |
| 1231 | if (!eventHandlerRestricted_iterator( |
| 1232 | NODE_EI(node), matchThread, thread)) { |
| 1233 | error = threadControl_setEventMode(JVMTI_ENABLE, |
| 1234 | NODE_EI(node), thread); |
| 1235 | } |
| 1236 | } |
| 1237 | return error; |
| 1238 | } |
| 1239 | |
| 1240 | /** |
| 1241 | * Do any disabling of events (including clearing breakpoints etc) |
| 1242 | * needed to no longer get the events requested by this handler node. |
| 1243 | */ |
| 1244 | static jvmtiError |
| 1245 | disableEvents(HandlerNode *node) |
| 1246 | { |
| 1247 | jvmtiError error = JVMTI_ERROR_NONE; |
| 1248 | jvmtiError error2 = JVMTI_ERROR_NONE; |
| 1249 | jthread thread; |
| 1250 | |
| 1251 | |
| 1252 | switch (NODE_EI(node)) { |
| 1253 | /* The stepping code directly enables/disables stepping as |
| 1254 | * necessary |
| 1255 | */ |
| 1256 | case EI_SINGLE_STEP: |
| 1257 | /* Internal thread event handlers are always present |
| 1258 | * (hardwired in the event hook), so we don't change the |
| 1259 | * notification mode here. |
| 1260 | */ |
| 1261 | case EI_THREAD_START: |
| 1262 | case EI_THREAD_END: |
| 1263 | case EI_VM_INIT: |
| 1264 | case EI_VM_DEATH: |
| 1265 | case EI_CLASS_PREPARE: |
| 1266 | case EI_GC_FINISH: |
| 1267 | return error; |
| 1268 | |
| 1269 | case EI_FIELD_ACCESS: |
| 1270 | case EI_FIELD_MODIFICATION: |
| 1271 | error = clearWatchpoint(node); |
| 1272 | break; |
| 1273 | |
| 1274 | case EI_BREAKPOINT: |
| 1275 | error = clearBreakpoint(node); |
| 1276 | break; |
| 1277 | |
| 1278 | default: |
| 1279 | break; |
| 1280 | } |
| 1281 | |
| 1282 | thread = requestThread(node); |
| 1283 | |
| 1284 | /* If this is the last request of it's kind on this thread |
| 1285 | * (or all threads (thread == NULL)) then disable these |
| 1286 | * events on this thread. |
| 1287 | * |
| 1288 | * Disable even if the above caused an error |
| 1289 | */ |
| 1290 | if (!eventHandlerRestricted_iterator(NODE_EI(node), matchThread, thread)) { |
| 1291 | error2 = threadControl_setEventMode(JVMTI_DISABLE, |
| 1292 | NODE_EI(node), thread); |
| 1293 | } |
| 1294 | return error != JVMTI_ERROR_NONE? error : error2; |
| 1295 | } |
| 1296 | |
| 1297 | |
| 1298 | /***** filter (and event) installation and deinstallation *****/ |
| 1299 | |
| 1300 | /** |
| 1301 | * Make the set of event filters that correspond with this |
| 1302 | * node active (including enabling the corresponding events). |
| 1303 | */ |
| 1304 | jvmtiError |
| 1305 | eventFilterRestricted_install(HandlerNode *node) |
| 1306 | { |
| 1307 | return enableEvents(node); |
| 1308 | } |
| 1309 | |
| 1310 | /** |
| 1311 | * Make the set of event filters that correspond with this |
| 1312 | * node inactive (including disabling the corresponding events |
| 1313 | * and freeing resources). |
| 1314 | */ |
| 1315 | jvmtiError |
| 1316 | eventFilterRestricted_deinstall(HandlerNode *node) |
| 1317 | { |
| 1318 | jvmtiError error1, error2; |
| 1319 | |
| 1320 | error1 = disableEvents(node); |
| 1321 | error2 = clearFilters(node); |
| 1322 | |
| 1323 | return error1 != JVMTI_ERROR_NONE? error1 : error2; |
| 1324 | } |