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annotate src/share/vm/prims/jvmtiEnvBase.hpp @ 3938:e6b1331a51d2
7086585: make Java field injection more flexible
Reviewed-by: jrose, twisti, kvn, coleenp
| author | never |
|---|---|
| date | Sat, 10 Sep 2011 17:29:02 -0700 |
| parents | 684faacebf20 |
| children | d2a62e0f25eb |
| rev | line source |
|---|---|
| 0 | 1 /* |
| 1972 | 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 #ifndef SHARE_VM_PRIMS_JVMTIENVBASE_HPP |
| 26 #define SHARE_VM_PRIMS_JVMTIENVBASE_HPP | |
| 27 | |
| 28 #include "classfile/classLoader.hpp" | |
| 29 #include "prims/jvmtiEnvThreadState.hpp" | |
| 30 #include "prims/jvmtiEventController.hpp" | |
| 31 #include "prims/jvmtiThreadState.hpp" | |
| 32 #include "runtime/fieldDescriptor.hpp" | |
| 33 #include "runtime/frame.hpp" | |
| 34 #include "runtime/handles.inline.hpp" | |
| 35 #include "runtime/thread.hpp" | |
| 36 #include "runtime/vm_operations.hpp" | |
| 37 #include "utilities/growableArray.hpp" | |
| 0 | 38 |
| 39 // | |
| 40 // Forward Declarations | |
| 41 // | |
| 42 | |
| 43 class JvmtiEnv; | |
| 44 class JvmtiThreadState; | |
| 45 class JvmtiRawMonitor; // for jvmtiEnv.hpp | |
| 46 class JvmtiEventControllerPrivate; | |
| 47 class JvmtiTagMap; | |
| 48 | |
| 49 | |
| 50 | |
| 51 // One JvmtiEnv object is created per jvmti attachment; | |
| 52 // done via JNI GetEnv() call. Multiple attachments are | |
| 53 // allowed in jvmti. | |
| 54 | |
| 55 class JvmtiEnvBase : public CHeapObj { | |
| 56 | |
| 57 private: | |
| 58 | |
| 59 static JvmtiEnvBase* _head_environment; // head of environment list | |
| 60 | |
| 61 static bool _globally_initialized; | |
| 62 static jvmtiPhase _phase; | |
| 63 static volatile int _dying_thread_env_iteration_count; | |
| 64 | |
| 65 public: | |
| 66 | |
| 67 enum { | |
| 68 JDK15_JVMTI_VERSION = JVMTI_VERSION_1_0 + 33, /* version: 1.0.33 */ | |
| 1988 | 69 JDK16_JVMTI_VERSION = JVMTI_VERSION_1_1 + 102, /* version: 1.1.102 */ |
| 70 JDK17_JVMTI_VERSION = JVMTI_VERSION_1_2 + 1 /* version: 1.2.1 */ | |
| 0 | 71 }; |
| 72 | |
| 73 static jvmtiPhase get_phase() { return _phase; } | |
| 74 static void set_phase(jvmtiPhase phase) { _phase = phase; } | |
| 75 static bool is_vm_live() { return _phase == JVMTI_PHASE_LIVE; } | |
| 76 | |
| 77 static void entering_dying_thread_env_iteration() { ++_dying_thread_env_iteration_count; } | |
| 78 static void leaving_dying_thread_env_iteration() { --_dying_thread_env_iteration_count; } | |
| 79 static bool is_inside_dying_thread_env_iteration(){ return _dying_thread_env_iteration_count > 0; } | |
| 80 | |
| 81 private: | |
| 82 | |
| 83 enum { | |
| 84 JVMTI_MAGIC = 0x71EE, | |
| 85 DISPOSED_MAGIC = 0xDEFC, | |
| 86 BAD_MAGIC = 0xDEAD | |
| 87 }; | |
| 88 | |
| 89 jvmtiEnv _jvmti_external; | |
| 90 jint _magic; | |
| 1121 | 91 jint _version; // version value passed to JNI GetEnv() |
| 0 | 92 JvmtiEnvBase* _next; |
| 93 bool _is_retransformable; | |
| 94 const void *_env_local_storage; // per env agent allocated data. | |
| 95 jvmtiEventCallbacks _event_callbacks; | |
| 96 jvmtiExtEventCallbacks _ext_event_callbacks; | |
| 97 JvmtiTagMap* _tag_map; | |
| 98 JvmtiEnvEventEnable _env_event_enable; | |
| 99 jvmtiCapabilities _current_capabilities; | |
| 100 jvmtiCapabilities _prohibited_capabilities; | |
| 101 volatile bool _class_file_load_hook_ever_enabled; | |
| 102 static volatile bool _needs_clean_up; | |
| 103 char** _native_method_prefixes; | |
| 104 int _native_method_prefix_count; | |
| 105 | |
| 106 protected: | |
| 1121 | 107 JvmtiEnvBase(jint version); |
| 0 | 108 ~JvmtiEnvBase(); |
| 109 void dispose(); | |
| 110 void env_dispose(); | |
| 111 | |
| 112 void set_env_local_storage(const void* data) { _env_local_storage = data; } | |
| 113 const void* get_env_local_storage() { return _env_local_storage; } | |
| 114 | |
| 115 void record_class_file_load_hook_enabled(); | |
| 116 void record_first_time_class_file_load_hook_enabled(); | |
| 117 | |
| 118 char** get_native_method_prefixes() { return _native_method_prefixes; } | |
| 119 int get_native_method_prefix_count() { return _native_method_prefix_count; } | |
| 120 jvmtiError set_native_method_prefixes(jint prefix_count, char** prefixes); | |
| 121 | |
| 122 private: | |
| 123 friend class JvmtiEventControllerPrivate; | |
| 124 void initialize(); | |
| 125 void set_event_callbacks(const jvmtiEventCallbacks* callbacks, jint size_of_callbacks); | |
| 126 static void globally_initialize(); | |
| 127 static void periodic_clean_up(); | |
| 128 | |
| 129 friend class JvmtiEnvIterator; | |
| 130 JvmtiEnv* next_environment() { return (JvmtiEnv*)_next; } | |
| 131 void set_next_environment(JvmtiEnvBase* env) { _next = env; } | |
| 132 static JvmtiEnv* head_environment() { return (JvmtiEnv*)_head_environment; } | |
| 133 | |
| 134 public: | |
| 135 | |
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136 bool is_valid(); |
| 0 | 137 |
| 1121 | 138 bool use_version_1_0_semantics(); // agent asked for version 1.0 |
| 139 bool use_version_1_1_semantics(); // agent asked for version 1.1 | |
| 1988 | 140 bool use_version_1_2_semantics(); // agent asked for version 1.2 |
| 1121 | 141 |
| 0 | 142 bool is_retransformable() { return _is_retransformable; } |
| 143 | |
| 144 static ByteSize jvmti_external_offset() { | |
| 145 return byte_offset_of(JvmtiEnvBase, _jvmti_external); | |
| 146 }; | |
| 147 | |
| 148 static JvmtiEnv* JvmtiEnv_from_jvmti_env(jvmtiEnv *env) { | |
| 149 return (JvmtiEnv*)((intptr_t)env - in_bytes(jvmti_external_offset())); | |
| 150 }; | |
| 151 | |
| 152 jvmtiCapabilities *get_capabilities() { return &_current_capabilities; } | |
| 153 | |
| 154 jvmtiCapabilities *get_prohibited_capabilities() { return &_prohibited_capabilities; } | |
| 155 | |
| 156 static char** get_all_native_method_prefixes(int* count_ptr); | |
| 157 | |
| 158 // This test will answer true when all environments have been disposed and some have | |
| 159 // not yet been deallocated. As a result, this test should only be used as an | |
| 160 // optimization for the no environment case. | |
| 161 static bool environments_might_exist() { | |
| 162 return head_environment() != NULL; | |
| 163 } | |
| 164 | |
| 165 static void check_for_periodic_clean_up(); | |
| 166 | |
| 167 JvmtiEnvEventEnable *env_event_enable() { | |
| 168 return &_env_event_enable; | |
| 169 } | |
| 170 | |
| 171 jvmtiError allocate(jlong size, unsigned char** mem_ptr) { | |
| 172 if (size < 0) { | |
| 173 return JVMTI_ERROR_ILLEGAL_ARGUMENT; | |
| 174 } | |
| 175 if (size == 0) { | |
| 176 *mem_ptr = NULL; | |
| 177 } else { | |
| 178 *mem_ptr = (unsigned char *)os::malloc((size_t)size); | |
| 179 if (*mem_ptr == NULL) { | |
| 180 return JVMTI_ERROR_OUT_OF_MEMORY; | |
| 181 } | |
| 182 } | |
| 183 return JVMTI_ERROR_NONE; | |
| 184 } | |
| 185 | |
| 186 jvmtiError deallocate(unsigned char* mem) { | |
| 187 if (mem != NULL) { | |
| 188 os::free(mem); | |
| 189 } | |
| 190 return JVMTI_ERROR_NONE; | |
| 191 } | |
| 192 | |
| 193 | |
| 194 // Memory functions | |
| 195 unsigned char* jvmtiMalloc(jlong size); // don't use this - call allocate | |
| 196 | |
| 197 // method to create a local handle | |
| 198 jobject jni_reference(Handle hndl) { | |
| 199 return JNIHandles::make_local(hndl()); | |
| 200 } | |
| 201 | |
| 202 // method to create a local handle. | |
| 203 // This function allows caller to specify which | |
| 204 // threads local handle table to use. | |
| 205 jobject jni_reference(JavaThread *thread, Handle hndl) { | |
| 206 return JNIHandles::make_local(thread, hndl()); | |
| 207 } | |
| 208 | |
| 209 // method to destroy a local handle | |
| 210 void destroy_jni_reference(jobject jobj) { | |
| 211 JNIHandles::destroy_local(jobj); | |
| 212 } | |
| 213 | |
| 214 // method to destroy a local handle. | |
| 215 // This function allows caller to specify which | |
| 216 // threads local handle table to use although currently it is | |
| 217 // not used. | |
| 218 void destroy_jni_reference(JavaThread *thread, jobject jobj) { | |
| 219 destroy_jni_reference(jobj); | |
| 220 } | |
| 221 | |
| 222 jvmtiEnv* jvmti_external() { return &_jvmti_external; }; | |
| 223 | |
| 224 // Event Dispatch | |
| 225 | |
| 226 bool has_callback(jvmtiEvent event_type) { | |
| 227 assert(event_type >= JVMTI_MIN_EVENT_TYPE_VAL && | |
| 228 event_type <= JVMTI_MAX_EVENT_TYPE_VAL, "checking"); | |
| 229 return ((void**)&_event_callbacks)[event_type-JVMTI_MIN_EVENT_TYPE_VAL] != NULL; | |
| 230 } | |
| 231 | |
| 232 jvmtiEventCallbacks* callbacks() { | |
| 233 return &_event_callbacks; | |
| 234 } | |
| 235 | |
| 236 jvmtiExtEventCallbacks* ext_callbacks() { | |
| 237 return &_ext_event_callbacks; | |
| 238 } | |
| 239 | |
| 240 void set_tag_map(JvmtiTagMap* tag_map) { | |
| 241 _tag_map = tag_map; | |
| 242 } | |
| 243 | |
| 244 JvmtiTagMap* tag_map() { | |
| 245 return _tag_map; | |
| 246 } | |
| 247 | |
| 248 | |
| 249 // return true if event is enabled globally or for any thread | |
| 250 // True only if there is a callback for it. | |
| 251 bool is_enabled(jvmtiEvent event_type) { | |
| 252 return _env_event_enable.is_enabled(event_type); | |
| 253 } | |
| 254 | |
| 255 // Random Utilities | |
| 256 | |
| 257 protected: | |
| 258 // helper methods for creating arrays of global JNI Handles from local Handles | |
| 259 // allocated into environment specific storage | |
| 260 jobject * new_jobjectArray(int length, Handle *handles); | |
| 261 jthread * new_jthreadArray(int length, Handle *handles); | |
| 262 jthreadGroup * new_jthreadGroupArray(int length, Handle *handles); | |
| 263 | |
| 264 // convert from JNIHandle to JavaThread * | |
| 265 JavaThread * get_JavaThread(jthread jni_thread); | |
| 266 | |
| 267 // convert to a jni jclass from a non-null klassOop | |
| 268 jclass get_jni_class_non_null(klassOop k); | |
| 269 | |
| 270 jint count_locked_objects(JavaThread *java_thread, Handle hobj); | |
| 271 jvmtiError get_locked_objects_in_frame(JavaThread *calling_thread, | |
| 272 JavaThread* java_thread, | |
| 273 javaVFrame *jvf, | |
| 274 GrowableArray<jvmtiMonitorStackDepthInfo*>* owned_monitors_list, | |
| 275 jint depth); | |
| 276 vframe* vframeFor(JavaThread* java_thread, jint depth); | |
| 277 | |
| 278 public: | |
| 279 // get a field descriptor for the specified class and field | |
| 280 static bool get_field_descriptor(klassOop k, jfieldID field, fieldDescriptor* fd); | |
| 281 // test for suspend - most (all?) of these should go away | |
| 282 static bool is_thread_fully_suspended(JavaThread *thread, | |
| 283 bool wait_for_suspend, | |
| 284 uint32_t *bits); | |
| 285 | |
| 286 | |
| 287 // JVMTI API helper functions which are called at safepoint or thread is suspended. | |
| 288 jvmtiError get_frame_count(JvmtiThreadState *state, jint *count_ptr); | |
| 289 jvmtiError get_frame_location(JavaThread* java_thread, jint depth, | |
| 290 jmethodID* method_ptr, jlocation* location_ptr); | |
| 291 jvmtiError get_object_monitor_usage(JavaThread *calling_thread, | |
| 292 jobject object, jvmtiMonitorUsage* info_ptr); | |
| 293 jvmtiError get_stack_trace(JavaThread *java_thread, | |
| 294 jint stack_depth, jint max_count, | |
| 295 jvmtiFrameInfo* frame_buffer, jint* count_ptr); | |
| 296 jvmtiError get_current_contended_monitor(JavaThread *calling_thread, | |
| 297 JavaThread *java_thread, | |
| 298 jobject *monitor_ptr); | |
| 299 jvmtiError get_owned_monitors(JavaThread *calling_thread, JavaThread* java_thread, | |
| 300 GrowableArray<jvmtiMonitorStackDepthInfo*> *owned_monitors_list); | |
| 301 jvmtiError check_top_frame(JavaThread* current_thread, JavaThread* java_thread, | |
| 302 jvalue value, TosState tos, Handle* ret_ob_h); | |
| 303 jvmtiError force_early_return(JavaThread* java_thread, jvalue value, TosState tos); | |
| 304 }; | |
| 305 | |
| 306 // This class is the only safe means of iterating through environments. | |
| 307 // Note that this iteratation includes invalid environments pending | |
| 308 // deallocation -- in fact, some uses depend on this behavior. | |
| 309 | |
| 310 class JvmtiEnvIterator : public StackObj { | |
| 311 private: | |
| 312 bool _entry_was_marked; | |
| 313 public: | |
| 314 JvmtiEnvIterator() { | |
| 315 if (Threads::number_of_threads() == 0) { | |
| 316 _entry_was_marked = false; // we are single-threaded, no need | |
| 317 } else { | |
| 318 Thread::current()->entering_jvmti_env_iteration(); | |
| 319 _entry_was_marked = true; | |
| 320 } | |
| 321 } | |
| 322 ~JvmtiEnvIterator() { | |
| 323 if (_entry_was_marked) { | |
| 324 Thread::current()->leaving_jvmti_env_iteration(); | |
| 325 } | |
| 326 } | |
| 327 JvmtiEnv* first() { return JvmtiEnvBase::head_environment(); } | |
| 328 JvmtiEnv* next(JvmtiEnvBase* env) { return env->next_environment(); } | |
| 329 }; | |
| 330 | |
| 331 | |
| 332 // VM operation to get monitor information with stack depth. | |
| 333 class VM_GetOwnedMonitorInfo : public VM_Operation { | |
| 334 private: | |
| 335 JvmtiEnv *_env; | |
| 336 JavaThread* _calling_thread; | |
| 337 JavaThread *_java_thread; | |
| 338 jvmtiError _result; | |
| 339 GrowableArray<jvmtiMonitorStackDepthInfo*> *_owned_monitors_list; | |
| 340 | |
| 341 public: | |
| 342 VM_GetOwnedMonitorInfo(JvmtiEnv* env, JavaThread* calling_thread, | |
| 343 JavaThread* java_thread, | |
| 344 GrowableArray<jvmtiMonitorStackDepthInfo*>* owned_monitor_list) { | |
| 345 _env = env; | |
| 346 _calling_thread = calling_thread; | |
| 347 _java_thread = java_thread; | |
| 348 _owned_monitors_list = owned_monitor_list; | |
| 349 _result = JVMTI_ERROR_NONE; | |
| 350 } | |
| 351 VMOp_Type type() const { return VMOp_GetOwnedMonitorInfo; } | |
| 352 void doit() { | |
| 353 ((JvmtiEnvBase *)_env)->get_owned_monitors(_calling_thread, _java_thread, | |
| 354 _owned_monitors_list); | |
| 355 } | |
| 356 jvmtiError result() { return _result; } | |
| 357 }; | |
| 358 | |
| 359 | |
| 360 // VM operation to get object monitor usage. | |
| 361 class VM_GetObjectMonitorUsage : public VM_Operation { | |
| 362 private: | |
| 363 JvmtiEnv *_env; | |
| 364 jobject _object; | |
| 365 JavaThread* _calling_thread; | |
| 366 jvmtiMonitorUsage* _info_ptr; | |
| 367 jvmtiError _result; | |
| 368 | |
| 369 public: | |
| 370 VM_GetObjectMonitorUsage(JvmtiEnv *env, JavaThread* calling_thread, jobject object, jvmtiMonitorUsage* info_ptr) { | |
| 371 _env = env; | |
| 372 _object = object; | |
| 373 _calling_thread = calling_thread; | |
| 374 _info_ptr = info_ptr; | |
| 375 } | |
| 376 VMOp_Type type() const { return VMOp_GetObjectMonitorUsage; } | |
| 377 jvmtiError result() { return _result; } | |
| 378 void doit() { | |
| 379 _result = ((JvmtiEnvBase*) _env)->get_object_monitor_usage(_calling_thread, _object, _info_ptr); | |
| 380 } | |
| 381 | |
| 382 }; | |
| 383 | |
| 384 // VM operation to get current contended monitor. | |
| 385 class VM_GetCurrentContendedMonitor : public VM_Operation { | |
| 386 private: | |
| 387 JvmtiEnv *_env; | |
| 388 JavaThread *_calling_thread; | |
| 389 JavaThread *_java_thread; | |
| 390 jobject *_owned_monitor_ptr; | |
| 391 jvmtiError _result; | |
| 392 | |
| 393 public: | |
| 394 VM_GetCurrentContendedMonitor(JvmtiEnv *env, JavaThread *calling_thread, JavaThread *java_thread, jobject *mon_ptr) { | |
| 395 _env = env; | |
| 396 _calling_thread = calling_thread; | |
| 397 _java_thread = java_thread; | |
| 398 _owned_monitor_ptr = mon_ptr; | |
| 399 } | |
| 400 VMOp_Type type() const { return VMOp_GetCurrentContendedMonitor; } | |
| 401 jvmtiError result() { return _result; } | |
| 402 void doit() { | |
| 403 _result = ((JvmtiEnvBase *)_env)->get_current_contended_monitor(_calling_thread,_java_thread,_owned_monitor_ptr); | |
| 404 } | |
| 405 }; | |
| 406 | |
| 407 // VM operation to get stack trace at safepoint. | |
| 408 class VM_GetStackTrace : public VM_Operation { | |
| 409 private: | |
| 410 JvmtiEnv *_env; | |
| 411 JavaThread *_java_thread; | |
| 412 jint _start_depth; | |
| 413 jint _max_count; | |
| 414 jvmtiFrameInfo *_frame_buffer; | |
| 415 jint *_count_ptr; | |
| 416 jvmtiError _result; | |
| 417 | |
| 418 public: | |
| 419 VM_GetStackTrace(JvmtiEnv *env, JavaThread *java_thread, | |
| 420 jint start_depth, jint max_count, | |
| 421 jvmtiFrameInfo* frame_buffer, jint* count_ptr) { | |
| 422 _env = env; | |
| 423 _java_thread = java_thread; | |
| 424 _start_depth = start_depth; | |
| 425 _max_count = max_count; | |
| 426 _frame_buffer = frame_buffer; | |
| 427 _count_ptr = count_ptr; | |
| 428 } | |
| 429 jvmtiError result() { return _result; } | |
| 430 VMOp_Type type() const { return VMOp_GetStackTrace; } | |
| 431 void doit() { | |
| 432 _result = ((JvmtiEnvBase *)_env)->get_stack_trace(_java_thread, | |
| 433 _start_depth, _max_count, | |
| 434 _frame_buffer, _count_ptr); | |
| 435 } | |
| 436 }; | |
| 437 | |
| 438 // forward declaration | |
| 439 struct StackInfoNode; | |
| 440 | |
| 441 // VM operation to get stack trace at safepoint. | |
| 442 class VM_GetMultipleStackTraces : public VM_Operation { | |
| 443 private: | |
| 444 JvmtiEnv *_env; | |
| 445 jint _max_frame_count; | |
| 446 jvmtiStackInfo *_stack_info; | |
| 447 jvmtiError _result; | |
| 448 int _frame_count_total; | |
| 449 struct StackInfoNode *_head; | |
| 450 | |
| 451 JvmtiEnvBase *env() { return (JvmtiEnvBase *)_env; } | |
| 452 jint max_frame_count() { return _max_frame_count; } | |
| 453 struct StackInfoNode *head() { return _head; } | |
| 454 void set_head(StackInfoNode *head) { _head = head; } | |
| 455 | |
| 456 protected: | |
| 457 void set_result(jvmtiError result) { _result = result; } | |
| 458 void fill_frames(jthread jt, JavaThread *thr, oop thread_oop); | |
| 459 void allocate_and_fill_stacks(jint thread_count); | |
| 460 | |
| 461 public: | |
| 462 VM_GetMultipleStackTraces(JvmtiEnv *env, jint max_frame_count) { | |
| 463 _env = env; | |
| 464 _max_frame_count = max_frame_count; | |
| 465 _frame_count_total = 0; | |
| 466 _head = NULL; | |
| 467 _result = JVMTI_ERROR_NONE; | |
| 468 } | |
| 469 VMOp_Type type() const { return VMOp_GetMultipleStackTraces; } | |
| 470 jvmtiStackInfo *stack_info() { return _stack_info; } | |
| 471 jvmtiError result() { return _result; } | |
| 472 }; | |
| 473 | |
| 474 | |
| 475 // VM operation to get stack trace at safepoint. | |
| 476 class VM_GetAllStackTraces : public VM_GetMultipleStackTraces { | |
| 477 private: | |
| 478 JavaThread *_calling_thread; | |
| 479 jint _final_thread_count; | |
| 480 | |
| 481 public: | |
| 482 VM_GetAllStackTraces(JvmtiEnv *env, JavaThread *calling_thread, | |
| 483 jint max_frame_count) | |
| 484 : VM_GetMultipleStackTraces(env, max_frame_count) { | |
| 485 _calling_thread = calling_thread; | |
| 486 } | |
| 487 VMOp_Type type() const { return VMOp_GetAllStackTraces; } | |
| 488 void doit(); | |
| 489 jint final_thread_count() { return _final_thread_count; } | |
| 490 }; | |
| 491 | |
| 492 // VM operation to get stack trace at safepoint. | |
| 493 class VM_GetThreadListStackTraces : public VM_GetMultipleStackTraces { | |
| 494 private: | |
| 495 jint _thread_count; | |
| 496 const jthread* _thread_list; | |
| 497 | |
| 498 public: | |
| 499 VM_GetThreadListStackTraces(JvmtiEnv *env, jint thread_count, const jthread* thread_list, jint max_frame_count) | |
| 500 : VM_GetMultipleStackTraces(env, max_frame_count) { | |
| 501 _thread_count = thread_count; | |
| 502 _thread_list = thread_list; | |
| 503 } | |
| 504 VMOp_Type type() const { return VMOp_GetThreadListStackTraces; } | |
| 505 void doit(); | |
| 506 }; | |
| 507 | |
| 508 | |
| 509 // VM operation to count stack frames at safepoint. | |
| 510 class VM_GetFrameCount : public VM_Operation { | |
| 511 private: | |
| 512 JvmtiEnv *_env; | |
| 513 JvmtiThreadState *_state; | |
| 514 jint *_count_ptr; | |
| 515 jvmtiError _result; | |
| 516 | |
| 517 public: | |
| 518 VM_GetFrameCount(JvmtiEnv *env, JvmtiThreadState *state, jint *count_ptr) { | |
| 519 _env = env; | |
| 520 _state = state; | |
| 521 _count_ptr = count_ptr; | |
| 522 } | |
| 523 VMOp_Type type() const { return VMOp_GetFrameCount; } | |
| 524 jvmtiError result() { return _result; } | |
| 525 void doit() { | |
| 526 _result = ((JvmtiEnvBase*)_env)->get_frame_count(_state, _count_ptr); | |
| 527 } | |
| 528 }; | |
| 529 | |
| 530 // VM operation to frame location at safepoint. | |
| 531 class VM_GetFrameLocation : public VM_Operation { | |
| 532 private: | |
| 533 JvmtiEnv *_env; | |
| 534 JavaThread* _java_thread; | |
| 535 jint _depth; | |
| 536 jmethodID* _method_ptr; | |
| 537 jlocation* _location_ptr; | |
| 538 jvmtiError _result; | |
| 539 | |
| 540 public: | |
| 541 VM_GetFrameLocation(JvmtiEnv *env, JavaThread* java_thread, jint depth, | |
| 542 jmethodID* method_ptr, jlocation* location_ptr) { | |
| 543 _env = env; | |
| 544 _java_thread = java_thread; | |
| 545 _depth = depth; | |
| 546 _method_ptr = method_ptr; | |
| 547 _location_ptr = location_ptr; | |
| 548 } | |
| 549 VMOp_Type type() const { return VMOp_GetFrameLocation; } | |
| 550 jvmtiError result() { return _result; } | |
| 551 void doit() { | |
| 552 _result = ((JvmtiEnvBase*)_env)->get_frame_location(_java_thread, _depth, | |
| 553 _method_ptr, _location_ptr); | |
| 554 } | |
| 555 }; | |
| 556 | |
| 557 | |
| 558 // ResourceTracker | |
| 559 // | |
| 560 // ResourceTracker works a little like a ResourceMark. All allocates | |
| 561 // using the resource tracker are recorded. If an allocate using the | |
| 562 // resource tracker fails the destructor will free any resources | |
| 563 // that were allocated using the tracker. | |
| 564 // The motive for this class is to avoid messy error recovery code | |
| 565 // in situations where multiple allocations are done in sequence. If | |
| 566 // the second or subsequent allocation fails it avoids any code to | |
| 567 // release memory allocated in the previous calls. | |
| 568 // | |
| 569 // Usage :- | |
| 570 // ResourceTracker rt(env); | |
| 571 // : | |
| 572 // err = rt.allocate(1024, &ptr); | |
| 573 | |
| 574 class ResourceTracker : public StackObj { | |
| 575 private: | |
| 576 JvmtiEnv* _env; | |
| 577 GrowableArray<unsigned char*> *_allocations; | |
| 578 bool _failed; | |
| 579 public: | |
| 580 ResourceTracker(JvmtiEnv* env); | |
| 581 ~ResourceTracker(); | |
| 582 jvmtiError allocate(jlong size, unsigned char** mem_ptr); | |
| 583 unsigned char* allocate(jlong size); | |
| 584 char* strdup(const char* str); | |
| 585 }; | |
| 586 | |
| 587 | |
| 588 // Jvmti monitor closure to collect off stack monitors. | |
| 589 class JvmtiMonitorClosure: public MonitorClosure { | |
| 590 private: | |
| 591 JavaThread *_java_thread; | |
| 592 JavaThread *_calling_thread; | |
| 593 GrowableArray<jvmtiMonitorStackDepthInfo*> *_owned_monitors_list; | |
| 594 jvmtiError _error; | |
| 595 JvmtiEnvBase *_env; | |
| 596 | |
| 597 public: | |
| 598 JvmtiMonitorClosure(JavaThread* thread, JavaThread *calling_thread, | |
| 599 GrowableArray<jvmtiMonitorStackDepthInfo*> *owned_monitors, | |
| 600 JvmtiEnvBase *env) { | |
| 601 _java_thread = thread; | |
| 602 _calling_thread = calling_thread; | |
| 603 _owned_monitors_list = owned_monitors; | |
| 604 _error = JVMTI_ERROR_NONE; | |
| 605 _env = env; | |
| 606 } | |
| 607 void do_monitor(ObjectMonitor* mon); | |
| 608 jvmtiError error() { return _error;} | |
| 609 }; | |
| 610 | |
| 1972 | 611 #endif // SHARE_VM_PRIMS_JVMTIENVBASE_HPP |