Mercurial > hg > truffle
annotate src/share/vm/prims/jvmtiManageCapabilities.cpp @ 12355:cefad50507d8
Merge with hs25-b53
| author | Gilles Duboscq <duboscq@ssw.jku.at> |
|---|---|
| date | Fri, 11 Oct 2013 10:38:03 +0200 |
| parents | c2323e2ea62b |
| children | abe03600372a |
| rev | line source |
|---|---|
| 0 | 1 /* |
|
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2 * Copyright (c) 2003, 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 "jvmtifiles/jvmtiEnv.hpp" | |
| 27 #include "prims/jvmtiExport.hpp" | |
| 28 #include "prims/jvmtiManageCapabilities.hpp" | |
| 0 | 29 static const jint CAPA_SIZE = (JVMTI_INTERNAL_CAPABILITY_COUNT + 7) / 8; |
| 30 | |
| 31 // capabilities which are always potentially available | |
| 32 jvmtiCapabilities JvmtiManageCapabilities::always_capabilities; | |
| 33 | |
| 34 // capabilities which are potentially available during OnLoad | |
| 35 jvmtiCapabilities JvmtiManageCapabilities::onload_capabilities; | |
| 36 | |
| 37 // capabilities which are always potentially available | |
| 38 // but to only one environment | |
| 39 jvmtiCapabilities JvmtiManageCapabilities::always_solo_capabilities; | |
| 40 | |
| 41 // capabilities which are potentially available during OnLoad | |
| 42 // but to only one environment | |
| 43 jvmtiCapabilities JvmtiManageCapabilities::onload_solo_capabilities; | |
| 44 | |
| 45 // remaining capabilities which are always potentially available | |
| 46 // but to only one environment | |
| 47 jvmtiCapabilities JvmtiManageCapabilities::always_solo_remaining_capabilities; | |
| 48 | |
| 49 // remaining capabilities which are potentially available during OnLoad | |
| 50 // but to only one environment | |
| 51 jvmtiCapabilities JvmtiManageCapabilities::onload_solo_remaining_capabilities; | |
| 52 | |
| 53 // all capabilities ever acquired | |
| 54 jvmtiCapabilities JvmtiManageCapabilities::acquired_capabilities; | |
| 55 | |
| 56 void JvmtiManageCapabilities::initialize() { | |
| 57 always_capabilities = init_always_capabilities(); | |
| 58 if (JvmtiEnv::get_phase() != JVMTI_PHASE_ONLOAD) { | |
| 59 recompute_always_capabilities(); | |
| 60 } | |
| 61 onload_capabilities = init_onload_capabilities(); | |
| 62 always_solo_capabilities = init_always_solo_capabilities(); | |
| 63 onload_solo_capabilities = init_onload_solo_capabilities(); | |
| 64 always_solo_remaining_capabilities = init_always_solo_capabilities(); | |
| 65 onload_solo_remaining_capabilities = init_onload_solo_capabilities(); | |
| 66 memset(&acquired_capabilities, 0, sizeof(acquired_capabilities)); | |
| 67 } | |
| 68 | |
| 69 // if the capability sets are initialized in the onload phase then | |
| 70 // it happens before class data sharing (CDS) is initialized. If it | |
| 71 // turns out that CDS gets disabled then we must adjust the always | |
| 72 // capabilities. To ensure a consistent view of the capabililties | |
| 73 // anything we add here should already be in the onload set. | |
| 74 void JvmtiManageCapabilities::recompute_always_capabilities() { | |
| 75 if (!UseSharedSpaces) { | |
| 76 jvmtiCapabilities jc = always_capabilities; | |
| 77 jc.can_generate_all_class_hook_events = 1; | |
| 78 always_capabilities = jc; | |
| 79 } | |
| 80 } | |
| 81 | |
| 82 | |
| 83 // corresponding init functions | |
| 84 jvmtiCapabilities JvmtiManageCapabilities::init_always_capabilities() { | |
| 85 jvmtiCapabilities jc; | |
| 86 | |
| 87 memset(&jc, 0, sizeof(jc)); | |
| 88 jc.can_get_bytecodes = 1; | |
| 89 jc.can_signal_thread = 1; | |
| 90 jc.can_get_source_file_name = 1; | |
| 91 jc.can_get_line_numbers = 1; | |
| 92 jc.can_get_synthetic_attribute = 1; | |
| 93 jc.can_get_monitor_info = 1; | |
| 94 jc.can_get_constant_pool = 1; | |
| 95 jc.can_generate_monitor_events = 1; | |
| 96 jc.can_generate_garbage_collection_events = 1; | |
| 97 jc.can_generate_compiled_method_load_events = 1; | |
| 98 jc.can_generate_native_method_bind_events = 1; | |
| 99 jc.can_generate_vm_object_alloc_events = 1; | |
| 100 if (os::is_thread_cpu_time_supported()) { | |
| 101 jc.can_get_current_thread_cpu_time = 1; | |
| 102 jc.can_get_thread_cpu_time = 1; | |
| 103 } | |
| 104 jc.can_redefine_classes = 1; | |
| 105 jc.can_redefine_any_class = 1; | |
| 106 jc.can_retransform_classes = 1; | |
| 107 jc.can_retransform_any_class = 1; | |
| 108 jc.can_set_native_method_prefix = 1; | |
| 109 jc.can_tag_objects = 1; | |
| 110 jc.can_generate_object_free_events = 1; | |
| 111 jc.can_generate_resource_exhaustion_heap_events = 1; | |
| 112 jc.can_generate_resource_exhaustion_threads_events = 1; | |
| 113 return jc; | |
| 114 } | |
| 115 | |
| 116 jvmtiCapabilities JvmtiManageCapabilities::init_onload_capabilities() { | |
| 117 jvmtiCapabilities jc; | |
| 118 | |
| 119 memset(&jc, 0, sizeof(jc)); | |
| 1078 | 120 #ifndef CC_INTERP |
| 0 | 121 jc.can_pop_frame = 1; |
| 122 jc.can_force_early_return = 1; | |
| 1078 | 123 #endif // !CC_INTERP |
| 0 | 124 jc.can_get_source_debug_extension = 1; |
| 125 jc.can_access_local_variables = 1; | |
| 126 jc.can_maintain_original_method_order = 1; | |
| 127 jc.can_generate_all_class_hook_events = 1; | |
| 128 jc.can_generate_single_step_events = 1; | |
| 129 jc.can_generate_exception_events = 1; | |
| 130 jc.can_generate_frame_pop_events = 1; | |
| 131 jc.can_generate_method_entry_events = 1; | |
| 132 jc.can_generate_method_exit_events = 1; | |
| 133 jc.can_get_owned_monitor_info = 1; | |
| 134 jc.can_get_owned_monitor_stack_depth_info = 1; | |
| 135 jc.can_get_current_contended_monitor = 1; | |
| 136 // jc.can_get_monitor_info = 1; | |
| 137 jc.can_tag_objects = 1; // TODO: this should have been removed | |
| 138 jc.can_generate_object_free_events = 1; // TODO: this should have been removed | |
| 139 return jc; | |
| 140 } | |
| 141 | |
| 142 | |
| 143 jvmtiCapabilities JvmtiManageCapabilities::init_always_solo_capabilities() { | |
| 144 jvmtiCapabilities jc; | |
| 145 | |
| 146 memset(&jc, 0, sizeof(jc)); | |
| 147 jc.can_suspend = 1; | |
| 148 return jc; | |
| 149 } | |
| 150 | |
| 151 | |
| 152 jvmtiCapabilities JvmtiManageCapabilities::init_onload_solo_capabilities() { | |
| 153 jvmtiCapabilities jc; | |
| 154 | |
| 155 memset(&jc, 0, sizeof(jc)); | |
| 156 jc.can_generate_field_modification_events = 1; | |
| 157 jc.can_generate_field_access_events = 1; | |
| 158 jc.can_generate_breakpoint_events = 1; | |
| 159 return jc; | |
| 160 } | |
| 161 | |
| 162 | |
| 163 jvmtiCapabilities *JvmtiManageCapabilities::either(const jvmtiCapabilities *a, const jvmtiCapabilities *b, | |
| 164 jvmtiCapabilities *result) { | |
| 165 char *ap = (char *)a; | |
| 166 char *bp = (char *)b; | |
| 167 char *resultp = (char *)result; | |
| 168 | |
| 169 for (int i = 0; i < CAPA_SIZE; ++i) { | |
| 170 *resultp++ = *ap++ | *bp++; | |
| 171 } | |
| 172 | |
| 173 return result; | |
| 174 } | |
| 175 | |
| 176 | |
| 177 jvmtiCapabilities *JvmtiManageCapabilities::both(const jvmtiCapabilities *a, const jvmtiCapabilities *b, | |
| 178 jvmtiCapabilities *result) { | |
| 179 char *ap = (char *)a; | |
| 180 char *bp = (char *)b; | |
| 181 char *resultp = (char *)result; | |
| 182 | |
| 183 for (int i = 0; i < CAPA_SIZE; ++i) { | |
| 184 *resultp++ = *ap++ & *bp++; | |
| 185 } | |
| 186 | |
| 187 return result; | |
| 188 } | |
| 189 | |
| 190 | |
| 191 jvmtiCapabilities *JvmtiManageCapabilities::exclude(const jvmtiCapabilities *a, const jvmtiCapabilities *b, | |
| 192 jvmtiCapabilities *result) { | |
| 193 char *ap = (char *)a; | |
| 194 char *bp = (char *)b; | |
| 195 char *resultp = (char *)result; | |
| 196 | |
| 197 for (int i = 0; i < CAPA_SIZE; ++i) { | |
| 198 *resultp++ = *ap++ & ~*bp++; | |
| 199 } | |
| 200 | |
| 201 return result; | |
| 202 } | |
| 203 | |
| 204 | |
| 205 bool JvmtiManageCapabilities::has_some(const jvmtiCapabilities *a) { | |
| 206 char *ap = (char *)a; | |
| 207 | |
| 208 for (int i = 0; i < CAPA_SIZE; ++i) { | |
| 209 if (*ap++ != 0) { | |
| 210 return true; | |
| 211 } | |
| 212 } | |
| 213 | |
| 214 return false; | |
| 215 } | |
| 216 | |
| 217 | |
| 218 void JvmtiManageCapabilities::copy_capabilities(const jvmtiCapabilities *from, jvmtiCapabilities *to) { | |
| 219 char *ap = (char *)from; | |
| 220 char *resultp = (char *)to; | |
| 221 | |
| 222 for (int i = 0; i < CAPA_SIZE; ++i) { | |
| 223 *resultp++ = *ap++; | |
| 224 } | |
| 225 } | |
| 226 | |
| 227 | |
| 228 void JvmtiManageCapabilities::get_potential_capabilities(const jvmtiCapabilities *current, | |
| 229 const jvmtiCapabilities *prohibited, | |
| 230 jvmtiCapabilities *result) { | |
| 231 // exclude prohibited capabilities, must be before adding current | |
| 232 exclude(&always_capabilities, prohibited, result); | |
| 233 | |
| 234 // must include current since it may possess solo capabilities and now prohibited | |
| 235 either(result, current, result); | |
| 236 | |
| 237 // add other remaining | |
| 238 either(result, &always_solo_remaining_capabilities, result); | |
| 239 | |
| 240 // if this is during OnLoad more capabilities are available | |
| 241 if (JvmtiEnv::get_phase() == JVMTI_PHASE_ONLOAD) { | |
| 242 either(result, &onload_capabilities, result); | |
| 243 either(result, &onload_solo_remaining_capabilities, result); | |
| 244 } | |
| 245 } | |
| 246 | |
| 247 jvmtiError JvmtiManageCapabilities::add_capabilities(const jvmtiCapabilities *current, | |
| 248 const jvmtiCapabilities *prohibited, | |
| 249 const jvmtiCapabilities *desired, | |
| 250 jvmtiCapabilities *result) { | |
| 251 // check that the capabilities being added are potential capabilities | |
| 252 jvmtiCapabilities temp; | |
| 253 get_potential_capabilities(current, prohibited, &temp); | |
| 254 if (has_some(exclude(desired, &temp, &temp))) { | |
| 255 return JVMTI_ERROR_NOT_AVAILABLE; | |
| 256 } | |
| 257 | |
| 258 // add to the set of ever acquired capabilities | |
| 259 either(&acquired_capabilities, desired, &acquired_capabilities); | |
| 260 | |
| 261 // onload capabilities that got added are now permanent - so, also remove from onload | |
| 262 both(&onload_capabilities, desired, &temp); | |
| 263 either(&always_capabilities, &temp, &always_capabilities); | |
| 264 exclude(&onload_capabilities, &temp, &onload_capabilities); | |
| 265 | |
| 266 // same for solo capabilities (transferred capabilities in the remaining sets handled as part of standard grab - below) | |
| 267 both(&onload_solo_capabilities, desired, &temp); | |
| 268 either(&always_solo_capabilities, &temp, &always_solo_capabilities); | |
| 269 exclude(&onload_solo_capabilities, &temp, &onload_solo_capabilities); | |
| 270 | |
| 271 // remove solo capabilities that are now taken | |
| 272 exclude(&always_solo_remaining_capabilities, desired, &always_solo_remaining_capabilities); | |
| 273 exclude(&onload_solo_remaining_capabilities, desired, &onload_solo_remaining_capabilities); | |
| 274 | |
| 275 // return the result | |
| 276 either(current, desired, result); | |
| 277 | |
| 278 update(); | |
| 279 | |
| 280 return JVMTI_ERROR_NONE; | |
| 281 } | |
| 282 | |
| 283 | |
| 284 void JvmtiManageCapabilities::relinquish_capabilities(const jvmtiCapabilities *current, | |
| 285 const jvmtiCapabilities *unwanted, | |
| 286 jvmtiCapabilities *result) { | |
| 287 jvmtiCapabilities to_trash; | |
| 288 jvmtiCapabilities temp; | |
| 289 | |
| 290 // can't give up what you don't have | |
| 291 both(current, unwanted, &to_trash); | |
| 292 | |
| 293 // restore solo capabilities but only those that belong | |
| 294 either(&always_solo_remaining_capabilities, both(&always_solo_capabilities, &to_trash, &temp), | |
| 295 &always_solo_remaining_capabilities); | |
| 296 either(&onload_solo_remaining_capabilities, both(&onload_solo_capabilities, &to_trash, &temp), | |
| 297 &onload_solo_remaining_capabilities); | |
| 298 | |
| 299 update(); | |
| 300 | |
| 301 // return the result | |
| 302 exclude(current, unwanted, result); | |
| 303 } | |
| 304 | |
| 305 | |
| 306 void JvmtiManageCapabilities::update() { | |
| 307 jvmtiCapabilities avail; | |
| 308 | |
| 309 // all capabilities | |
| 310 either(&always_capabilities, &always_solo_capabilities, &avail); | |
| 311 | |
| 312 bool interp_events = | |
| 313 avail.can_generate_field_access_events || | |
| 314 avail.can_generate_field_modification_events || | |
| 315 avail.can_generate_single_step_events || | |
| 316 avail.can_generate_frame_pop_events || | |
| 317 avail.can_generate_method_entry_events || | |
| 318 avail.can_generate_method_exit_events; | |
| 319 bool enter_all_methods = | |
| 320 interp_events || | |
| 321 avail.can_generate_breakpoint_events; | |
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322 if (enter_all_methods) { |
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323 // Disable these when tracking the bytecodes |
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324 UseFastEmptyMethods = false; |
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325 UseFastAccessorMethods = false; |
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326 } |
| 0 | 327 |
| 328 if (avail.can_generate_breakpoint_events) { | |
| 329 RewriteFrequentPairs = false; | |
| 330 } | |
| 331 | |
| 332 // If can_redefine_classes is enabled in the onload phase then we know that the | |
| 333 // dependency information recorded by the compiler is complete. | |
| 334 if ((avail.can_redefine_classes || avail.can_retransform_classes) && | |
| 335 JvmtiEnv::get_phase() == JVMTI_PHASE_ONLOAD) { | |
| 336 JvmtiExport::set_all_dependencies_are_recorded(true); | |
| 337 } | |
| 338 | |
| 339 JvmtiExport::set_can_get_source_debug_extension(avail.can_get_source_debug_extension); | |
| 340 JvmtiExport::set_can_maintain_original_method_order(avail.can_maintain_original_method_order); | |
| 341 JvmtiExport::set_can_post_interpreter_events(interp_events); | |
| 342 JvmtiExport::set_can_hotswap_or_post_breakpoint( | |
| 343 avail.can_generate_breakpoint_events || | |
| 344 avail.can_redefine_classes || | |
| 345 avail.can_retransform_classes); | |
| 346 JvmtiExport::set_can_modify_any_class( | |
| 347 avail.can_generate_breakpoint_events || | |
| 348 avail.can_generate_all_class_hook_events); | |
| 349 JvmtiExport::set_can_walk_any_space( | |
| 350 avail.can_tag_objects); // disable sharing in onload phase | |
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351 // This controls whether the compilers keep extra locals live to |
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352 // improve the debugging experience so only set them if the selected |
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353 // capabilities look like a debugger. |
| 0 | 354 JvmtiExport::set_can_access_local_variables( |
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355 avail.can_access_local_variables || |
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356 avail.can_generate_breakpoint_events || |
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357 avail.can_generate_frame_pop_events); |
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358 JvmtiExport::set_can_post_on_exceptions( |
| 0 | 359 avail.can_generate_exception_events || |
| 360 avail.can_generate_frame_pop_events || | |
| 361 avail.can_generate_method_exit_events); | |
| 362 JvmtiExport::set_can_post_breakpoint(avail.can_generate_breakpoint_events); | |
| 363 JvmtiExport::set_can_post_field_access(avail.can_generate_field_access_events); | |
| 364 JvmtiExport::set_can_post_field_modification(avail.can_generate_field_modification_events); | |
| 365 JvmtiExport::set_can_post_method_entry(avail.can_generate_method_entry_events); | |
| 366 JvmtiExport::set_can_post_method_exit(avail.can_generate_method_exit_events || | |
| 367 avail.can_generate_frame_pop_events); | |
| 368 JvmtiExport::set_can_pop_frame(avail.can_pop_frame); | |
| 369 JvmtiExport::set_can_force_early_return(avail.can_force_early_return); | |
| 370 JvmtiExport::set_should_clean_up_heap_objects(avail.can_generate_breakpoint_events); | |
| 371 } | |
| 372 | |
| 373 #ifndef PRODUCT | |
| 374 | |
| 375 void JvmtiManageCapabilities:: print(const jvmtiCapabilities* cap) { | |
| 376 tty->print_cr("----- capabilities -----"); | |
| 377 if (cap->can_tag_objects) | |
| 378 tty->print_cr("can_tag_objects"); | |
| 379 if (cap->can_generate_field_modification_events) | |
| 380 tty->print_cr("can_generate_field_modification_events"); | |
| 381 if (cap->can_generate_field_access_events) | |
| 382 tty->print_cr("can_generate_field_access_events"); | |
| 383 if (cap->can_get_bytecodes) | |
| 384 tty->print_cr("can_get_bytecodes"); | |
| 385 if (cap->can_get_synthetic_attribute) | |
| 386 tty->print_cr("can_get_synthetic_attribute"); | |
| 387 if (cap->can_get_owned_monitor_info) | |
| 388 tty->print_cr("can_get_owned_monitor_info"); | |
| 389 if (cap->can_get_current_contended_monitor) | |
| 390 tty->print_cr("can_get_current_contended_monitor"); | |
| 391 if (cap->can_get_monitor_info) | |
| 392 tty->print_cr("can_get_monitor_info"); | |
| 393 if (cap->can_get_constant_pool) | |
| 394 tty->print_cr("can_get_constant_pool"); | |
| 395 if (cap->can_pop_frame) | |
| 396 tty->print_cr("can_pop_frame"); | |
| 397 if (cap->can_force_early_return) | |
| 398 tty->print_cr("can_force_early_return"); | |
| 399 if (cap->can_redefine_classes) | |
| 400 tty->print_cr("can_redefine_classes"); | |
| 401 if (cap->can_retransform_classes) | |
| 402 tty->print_cr("can_retransform_classes"); | |
| 403 if (cap->can_signal_thread) | |
| 404 tty->print_cr("can_signal_thread"); | |
| 405 if (cap->can_get_source_file_name) | |
| 406 tty->print_cr("can_get_source_file_name"); | |
| 407 if (cap->can_get_line_numbers) | |
| 408 tty->print_cr("can_get_line_numbers"); | |
| 409 if (cap->can_get_source_debug_extension) | |
| 410 tty->print_cr("can_get_source_debug_extension"); | |
| 411 if (cap->can_access_local_variables) | |
| 412 tty->print_cr("can_access_local_variables"); | |
| 413 if (cap->can_maintain_original_method_order) | |
| 414 tty->print_cr("can_maintain_original_method_order"); | |
| 415 if (cap->can_generate_single_step_events) | |
| 416 tty->print_cr("can_generate_single_step_events"); | |
| 417 if (cap->can_generate_exception_events) | |
| 418 tty->print_cr("can_generate_exception_events"); | |
| 419 if (cap->can_generate_frame_pop_events) | |
| 420 tty->print_cr("can_generate_frame_pop_events"); | |
| 421 if (cap->can_generate_breakpoint_events) | |
| 422 tty->print_cr("can_generate_breakpoint_events"); | |
| 423 if (cap->can_suspend) | |
| 424 tty->print_cr("can_suspend"); | |
| 425 if (cap->can_redefine_any_class ) | |
| 426 tty->print_cr("can_redefine_any_class"); | |
| 427 if (cap->can_retransform_any_class ) | |
| 428 tty->print_cr("can_retransform_any_class"); | |
| 429 if (cap->can_get_current_thread_cpu_time) | |
| 430 tty->print_cr("can_get_current_thread_cpu_time"); | |
| 431 if (cap->can_get_thread_cpu_time) | |
| 432 tty->print_cr("can_get_thread_cpu_time"); | |
| 433 if (cap->can_generate_method_entry_events) | |
| 434 tty->print_cr("can_generate_method_entry_events"); | |
| 435 if (cap->can_generate_method_exit_events) | |
| 436 tty->print_cr("can_generate_method_exit_events"); | |
| 437 if (cap->can_generate_all_class_hook_events) | |
| 438 tty->print_cr("can_generate_all_class_hook_events"); | |
| 439 if (cap->can_generate_compiled_method_load_events) | |
| 440 tty->print_cr("can_generate_compiled_method_load_events"); | |
| 441 if (cap->can_generate_monitor_events) | |
| 442 tty->print_cr("can_generate_monitor_events"); | |
| 443 if (cap->can_generate_vm_object_alloc_events) | |
| 444 tty->print_cr("can_generate_vm_object_alloc_events"); | |
| 445 if (cap->can_generate_native_method_bind_events) | |
| 446 tty->print_cr("can_generate_native_method_bind_events"); | |
| 447 if (cap->can_generate_garbage_collection_events) | |
| 448 tty->print_cr("can_generate_garbage_collection_events"); | |
| 449 if (cap->can_generate_object_free_events) | |
| 450 tty->print_cr("can_generate_object_free_events"); | |
| 451 if (cap->can_generate_resource_exhaustion_heap_events) | |
| 452 tty->print_cr("can_generate_resource_exhaustion_heap_events"); | |
| 453 if (cap->can_generate_resource_exhaustion_threads_events) | |
| 454 tty->print_cr("can_generate_resource_exhaustion_threads_events"); | |
| 455 } | |
| 456 | |
| 457 #endif |