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annotate src/share/vm/prims/jvmtiExport.hpp @ 1552:c18cbe5936b8
6941466: Oracle rebranding changes for Hotspot repositories
Summary: Change all the Sun copyrights to Oracle copyright
Reviewed-by: ohair
| author | trims |
|---|---|
| date | Thu, 27 May 2010 19:08:38 -0700 |
| parents | b4776199210f |
| children | e9ff18c4ace7 |
| rev | line source |
|---|---|
| 0 | 1 /* |
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2 * Copyright (c) 1998, 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 | |
| 25 #ifndef _JAVA_JVMTIEXPORT_H_ | |
| 26 #define _JAVA_JVMTIEXPORT_H_ | |
| 27 | |
| 28 // Forward declarations | |
| 29 | |
| 30 class JvmtiEventControllerPrivate; | |
| 31 class JvmtiManageCapabilities; | |
| 32 class JvmtiEnv; | |
| 33 class JvmtiThreadState; | |
| 34 class AttachOperation; | |
| 35 | |
| 36 #ifndef JVMTI_KERNEL | |
| 37 #define JVMTI_SUPPORT_FLAG(key) \ | |
| 38 private: \ | |
| 39 static bool _##key; \ | |
| 40 public: \ | |
| 41 inline static void set_##key(bool on) { _##key = (on != 0); } \ | |
| 42 inline static bool key() { return _##key; } | |
| 43 #else // JVMTI_KERNEL | |
| 44 #define JVMTI_SUPPORT_FLAG(key) \ | |
| 45 private: \ | |
| 46 const static bool _##key = false; \ | |
| 47 public: \ | |
| 48 inline static void set_##key(bool on) { report_unsupported(on); } \ | |
| 49 inline static bool key() { return _##key; } | |
| 50 #endif // JVMTI_KERNEL | |
| 51 | |
| 52 | |
| 53 // This class contains the JVMTI interface for the rest of hotspot. | |
| 54 // | |
| 55 class JvmtiExport : public AllStatic { | |
| 56 private: | |
| 57 static int _field_access_count; | |
| 58 static int _field_modification_count; | |
| 59 | |
| 60 static bool _can_access_local_variables; | |
| 61 static bool _can_hotswap_or_post_breakpoint; | |
| 62 static bool _can_modify_any_class; | |
| 63 static bool _can_walk_any_space; | |
| 64 | |
| 65 JVMTI_SUPPORT_FLAG(can_get_source_debug_extension) | |
| 66 JVMTI_SUPPORT_FLAG(can_maintain_original_method_order) | |
| 67 JVMTI_SUPPORT_FLAG(can_post_interpreter_events) | |
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68 JVMTI_SUPPORT_FLAG(can_post_on_exceptions) |
| 0 | 69 JVMTI_SUPPORT_FLAG(can_post_breakpoint) |
| 70 JVMTI_SUPPORT_FLAG(can_post_field_access) | |
| 71 JVMTI_SUPPORT_FLAG(can_post_field_modification) | |
| 72 JVMTI_SUPPORT_FLAG(can_post_method_entry) | |
| 73 JVMTI_SUPPORT_FLAG(can_post_method_exit) | |
| 74 JVMTI_SUPPORT_FLAG(can_pop_frame) | |
| 75 JVMTI_SUPPORT_FLAG(can_force_early_return) | |
| 76 | |
| 77 friend class JvmtiEventControllerPrivate; // should only modify these flags | |
| 78 JVMTI_SUPPORT_FLAG(should_post_single_step) | |
| 79 JVMTI_SUPPORT_FLAG(should_post_field_access) | |
| 80 JVMTI_SUPPORT_FLAG(should_post_field_modification) | |
| 81 JVMTI_SUPPORT_FLAG(should_post_class_load) | |
| 82 JVMTI_SUPPORT_FLAG(should_post_class_prepare) | |
| 83 JVMTI_SUPPORT_FLAG(should_post_class_unload) | |
| 84 JVMTI_SUPPORT_FLAG(should_post_native_method_bind) | |
| 85 JVMTI_SUPPORT_FLAG(should_post_compiled_method_load) | |
| 86 JVMTI_SUPPORT_FLAG(should_post_compiled_method_unload) | |
| 87 JVMTI_SUPPORT_FLAG(should_post_dynamic_code_generated) | |
| 88 JVMTI_SUPPORT_FLAG(should_post_monitor_contended_enter) | |
| 89 JVMTI_SUPPORT_FLAG(should_post_monitor_contended_entered) | |
| 90 JVMTI_SUPPORT_FLAG(should_post_monitor_wait) | |
| 91 JVMTI_SUPPORT_FLAG(should_post_monitor_waited) | |
| 92 JVMTI_SUPPORT_FLAG(should_post_data_dump) | |
| 93 JVMTI_SUPPORT_FLAG(should_post_garbage_collection_start) | |
| 94 JVMTI_SUPPORT_FLAG(should_post_garbage_collection_finish) | |
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95 JVMTI_SUPPORT_FLAG(should_post_on_exceptions) |
| 0 | 96 |
| 97 // ------ the below maybe don't have to be (but are for now) | |
| 98 // fixed conditions here ------------ | |
| 99 // any events can be enabled | |
| 100 JVMTI_SUPPORT_FLAG(should_post_thread_life) | |
| 101 JVMTI_SUPPORT_FLAG(should_post_object_free) | |
| 102 JVMTI_SUPPORT_FLAG(should_post_resource_exhausted) | |
| 103 | |
| 104 // we are holding objects on the heap - need to talk to GC - e.g. | |
| 105 // breakpoint info | |
| 106 JVMTI_SUPPORT_FLAG(should_clean_up_heap_objects) | |
| 107 JVMTI_SUPPORT_FLAG(should_post_vm_object_alloc) | |
| 108 | |
| 109 // If flag cannot be implemented, give an error if on=true | |
| 110 static void report_unsupported(bool on); | |
| 111 | |
| 112 // these should only be called by the friend class | |
| 113 friend class JvmtiManageCapabilities; | |
| 114 inline static void set_can_modify_any_class(bool on) { _can_modify_any_class = (on != 0); } | |
| 115 inline static void set_can_access_local_variables(bool on) { _can_access_local_variables = (on != 0); } | |
| 116 inline static void set_can_hotswap_or_post_breakpoint(bool on) { _can_hotswap_or_post_breakpoint = (on != 0); } | |
| 117 inline static void set_can_walk_any_space(bool on) { _can_walk_any_space = (on != 0); } | |
| 118 | |
| 119 enum { | |
| 120 JVMTI_VERSION_MASK = 0x70000000, | |
| 121 JVMTI_VERSION_VALUE = 0x30000000, | |
| 122 JVMDI_VERSION_VALUE = 0x20000000 | |
| 123 }; | |
| 124 | |
| 125 static void post_field_modification(JavaThread *thread, methodOop method, address location, | |
| 126 KlassHandle field_klass, Handle object, jfieldID field, | |
| 127 char sig_type, jvalue *value); | |
| 128 | |
| 129 | |
| 130 private: | |
| 131 // CompiledMethodUnload events are reported from the VM thread so they | |
| 132 // are collected in lists (of jmethodID/addresses) and the events are posted later | |
| 133 // from threads posting CompieldMethodLoad or DynamicCodeGenerated events. | |
| 134 static bool _have_pending_compiled_method_unload_events; | |
| 135 static GrowableArray<jmethodID>* _pending_compiled_method_unload_method_ids; | |
| 136 static GrowableArray<const void *>* _pending_compiled_method_unload_code_begins; | |
| 137 static JavaThread* _current_poster; | |
| 138 | |
| 139 // tests if there are CompiledMethodUnload events pending | |
| 140 inline static bool have_pending_compiled_method_unload_events() { | |
| 141 return _have_pending_compiled_method_unload_events; | |
| 142 } | |
| 143 | |
| 144 // posts any pending CompiledMethodUnload events. | |
| 145 static void post_pending_compiled_method_unload_events(); | |
| 146 | |
| 147 // posts a DynamicCodeGenerated event (internal/private implementation). | |
| 148 // The public post_dynamic_code_generated* functions make use of the | |
| 149 // internal implementation. | |
| 150 static void post_dynamic_code_generated_internal(const char *name, const void *code_begin, const void *code_end) KERNEL_RETURN; | |
| 151 | |
| 152 | |
| 153 // GenerateEvents support to allow posting of CompiledMethodLoad and | |
| 154 // DynamicCodeGenerated events for a given environment. | |
| 155 friend class JvmtiCodeBlobEvents; | |
| 156 | |
| 157 static void post_compiled_method_load(JvmtiEnv* env, const jmethodID method, const jint length, | |
| 158 const void *code_begin, const jint map_length, | |
| 159 const jvmtiAddrLocationMap* map) KERNEL_RETURN; | |
| 160 static void post_dynamic_code_generated(JvmtiEnv* env, const char *name, const void *code_begin, | |
| 161 const void *code_end) KERNEL_RETURN; | |
| 162 | |
| 163 // The RedefineClasses() API breaks some invariants in the "regular" | |
| 164 // system. For example, there are sanity checks when GC'ing nmethods | |
| 165 // that require the containing class to be unloading. However, when a | |
| 166 // method is redefined, the old method and nmethod can become GC'able | |
| 167 // without the containing class unloading. The state of becoming | |
| 168 // GC'able can be asynchronous to the RedefineClasses() call since | |
| 169 // the old method may still be running and cannot be GC'ed until | |
| 170 // after all old invocations have finished. Additionally, a method | |
| 171 // that has not been redefined may have an nmethod that depends on | |
| 172 // the redefined method. The dependent nmethod will get deopted in | |
| 173 // this case and may also be GC'able without the containing class | |
| 174 // being unloaded. | |
| 175 // | |
| 176 // This flag indicates whether RedefineClasses() has ever redefined | |
| 177 // one or more classes during the lifetime of the VM. The flag should | |
| 178 // only be set by the friend class and can be queried by other sub | |
| 179 // systems as needed to relax invariant checks. | |
| 180 static bool _has_redefined_a_class; | |
| 181 friend class VM_RedefineClasses; | |
| 182 inline static void set_has_redefined_a_class() { | |
| 183 _has_redefined_a_class = true; | |
| 184 } | |
| 185 | |
| 186 // Flag to indicate if the compiler has recorded all dependencies. When the | |
| 187 // can_redefine_classes capability is enabled in the OnLoad phase then the compiler | |
| 188 // records all dependencies from startup. However if the capability is first | |
| 189 // enabled some time later then the dependencies recorded by the compiler | |
| 190 // are incomplete. This flag is used by RedefineClasses to know if the | |
| 191 // dependency information is complete or not. | |
| 192 static bool _all_dependencies_are_recorded; | |
| 193 | |
| 194 public: | |
| 195 inline static bool has_redefined_a_class() { | |
| 196 return _has_redefined_a_class; | |
| 197 } | |
| 198 | |
| 199 inline static bool all_dependencies_are_recorded() { | |
| 200 return _all_dependencies_are_recorded; | |
| 201 } | |
| 202 | |
| 203 inline static void set_all_dependencies_are_recorded(bool on) { | |
| 204 _all_dependencies_are_recorded = (on != 0); | |
| 205 } | |
| 206 | |
| 207 | |
| 208 // let JVMTI know that the JVM_OnLoad code is running | |
| 209 static void enter_onload_phase(); | |
| 210 | |
| 211 // let JVMTI know that the VM isn't up yet (and JVM_OnLoad code isn't running) | |
| 212 static void enter_primordial_phase(); | |
| 213 | |
| 214 // let JVMTI know that the VM isn't up yet but JNI is live | |
| 215 static void enter_start_phase(); | |
| 216 | |
| 217 // let JVMTI know that the VM is fully up and running now | |
| 218 static void enter_live_phase(); | |
| 219 | |
| 220 // ------ can_* conditions (below) are set at OnLoad and never changed ------------ | |
| 221 inline static bool can_modify_any_class() { return _can_modify_any_class; } | |
| 222 inline static bool can_access_local_variables() { return _can_access_local_variables; } | |
| 223 inline static bool can_hotswap_or_post_breakpoint() { return _can_hotswap_or_post_breakpoint; } | |
| 224 inline static bool can_walk_any_space() { return _can_walk_any_space; } | |
| 225 | |
| 226 // field access management | |
| 227 static address get_field_access_count_addr(); | |
| 228 | |
| 229 // field modification management | |
| 230 static address get_field_modification_count_addr(); | |
| 231 | |
| 232 // ----------------- | |
| 233 | |
| 234 static bool is_jvmti_version(jint version) { return (version & JVMTI_VERSION_MASK) == JVMTI_VERSION_VALUE; } | |
| 235 static bool is_jvmdi_version(jint version) { return (version & JVMTI_VERSION_MASK) == JVMDI_VERSION_VALUE; } | |
| 236 static jint get_jvmti_interface(JavaVM *jvm, void **penv, jint version); | |
| 1121 | 237 static void decode_version_values(jint version, int * major, int * minor, |
| 238 int * micro); | |
| 0 | 239 |
| 240 // single stepping management methods | |
| 241 static void at_single_stepping_point(JavaThread *thread, methodOop method, address location) KERNEL_RETURN; | |
| 242 static void expose_single_stepping(JavaThread *thread) KERNEL_RETURN; | |
| 243 static bool hide_single_stepping(JavaThread *thread) KERNEL_RETURN_(return false;); | |
| 244 | |
| 245 // Methods that notify the debugger that something interesting has happened in the VM. | |
| 246 static void post_vm_start (); | |
| 247 static void post_vm_initialized (); | |
| 248 static void post_vm_death (); | |
| 249 | |
| 250 static void post_single_step (JavaThread *thread, methodOop method, address location) KERNEL_RETURN; | |
| 251 static void post_raw_breakpoint (JavaThread *thread, methodOop method, address location) KERNEL_RETURN; | |
| 252 | |
| 253 static void post_exception_throw (JavaThread *thread, methodOop method, address location, oop exception) KERNEL_RETURN; | |
| 254 static void notice_unwind_due_to_exception (JavaThread *thread, methodOop method, address location, oop exception, bool in_handler_frame) KERNEL_RETURN; | |
| 255 | |
| 256 static oop jni_GetField_probe (JavaThread *thread, jobject jobj, | |
| 257 oop obj, klassOop klass, jfieldID fieldID, bool is_static) | |
| 258 KERNEL_RETURN_(return NULL;); | |
| 259 static oop jni_GetField_probe_nh (JavaThread *thread, jobject jobj, | |
| 260 oop obj, klassOop klass, jfieldID fieldID, bool is_static) | |
| 261 KERNEL_RETURN_(return NULL;); | |
| 262 static void post_field_access_by_jni (JavaThread *thread, oop obj, | |
| 263 klassOop klass, jfieldID fieldID, bool is_static) KERNEL_RETURN; | |
| 264 static void post_field_access (JavaThread *thread, methodOop method, | |
| 265 address location, KlassHandle field_klass, Handle object, jfieldID field) KERNEL_RETURN; | |
| 266 static oop jni_SetField_probe (JavaThread *thread, jobject jobj, | |
| 267 oop obj, klassOop klass, jfieldID fieldID, bool is_static, char sig_type, | |
| 268 jvalue *value) KERNEL_RETURN_(return NULL;); | |
| 269 static oop jni_SetField_probe_nh (JavaThread *thread, jobject jobj, | |
| 270 oop obj, klassOop klass, jfieldID fieldID, bool is_static, char sig_type, | |
| 271 jvalue *value) KERNEL_RETURN_(return NULL;); | |
| 272 static void post_field_modification_by_jni(JavaThread *thread, oop obj, | |
| 273 klassOop klass, jfieldID fieldID, bool is_static, char sig_type, | |
| 274 jvalue *value); | |
| 275 static void post_raw_field_modification(JavaThread *thread, methodOop method, | |
| 276 address location, KlassHandle field_klass, Handle object, jfieldID field, | |
| 277 char sig_type, jvalue *value) KERNEL_RETURN; | |
| 278 | |
| 279 static void post_method_entry (JavaThread *thread, methodOop method, frame current_frame) KERNEL_RETURN; | |
| 280 static void post_method_exit (JavaThread *thread, methodOop method, frame current_frame) KERNEL_RETURN; | |
| 281 | |
| 282 static void post_class_load (JavaThread *thread, klassOop klass) KERNEL_RETURN; | |
| 283 static void post_class_unload (klassOop klass) KERNEL_RETURN; | |
| 284 static void post_class_prepare (JavaThread *thread, klassOop klass) KERNEL_RETURN; | |
| 285 | |
| 286 static void post_thread_start (JavaThread *thread) KERNEL_RETURN; | |
| 287 static void post_thread_end (JavaThread *thread) KERNEL_RETURN; | |
| 288 | |
| 289 // Support for java.lang.instrument agent loading. | |
| 290 static bool _should_post_class_file_load_hook; | |
| 291 inline static void set_should_post_class_file_load_hook(bool on) { _should_post_class_file_load_hook = on; } | |
| 292 inline static bool should_post_class_file_load_hook() { return _should_post_class_file_load_hook; } | |
| 293 static void post_class_file_load_hook(symbolHandle h_name, Handle class_loader, | |
| 294 Handle h_protection_domain, | |
| 295 unsigned char **data_ptr, unsigned char **end_ptr, | |
| 296 unsigned char **cached_data_ptr, | |
| 297 jint *cached_length_ptr); | |
| 298 static void post_native_method_bind(methodOop method, address* function_ptr) KERNEL_RETURN; | |
| 299 static void post_compiled_method_load(nmethod *nm) KERNEL_RETURN; | |
| 300 static void post_dynamic_code_generated(const char *name, const void *code_begin, const void *code_end) KERNEL_RETURN; | |
| 301 | |
| 302 // used at a safepoint to post a CompiledMethodUnload event | |
| 303 static void post_compiled_method_unload_at_safepoint(jmethodID mid, const void *code_begin) KERNEL_RETURN; | |
| 304 | |
| 305 // similiar to post_dynamic_code_generated except that it can be used to | |
| 306 // post a DynamicCodeGenerated event while holding locks in the VM. Any event | |
| 307 // posted using this function is recorded by the enclosing event collector | |
| 308 // -- JvmtiDynamicCodeEventCollector. | |
| 309 static void post_dynamic_code_generated_while_holding_locks(const char* name, address code_begin, address code_end) KERNEL_RETURN; | |
| 310 | |
| 311 static void post_garbage_collection_finish() KERNEL_RETURN; | |
| 312 static void post_garbage_collection_start() KERNEL_RETURN; | |
| 313 static void post_data_dump() KERNEL_RETURN; | |
| 314 static void post_monitor_contended_enter(JavaThread *thread, ObjectMonitor *obj_mntr) KERNEL_RETURN; | |
| 315 static void post_monitor_contended_entered(JavaThread *thread, ObjectMonitor *obj_mntr) KERNEL_RETURN; | |
| 316 static void post_monitor_wait(JavaThread *thread, oop obj, jlong timeout) KERNEL_RETURN; | |
| 317 static void post_monitor_waited(JavaThread *thread, ObjectMonitor *obj_mntr, jboolean timed_out) KERNEL_RETURN; | |
| 318 static void post_object_free(JvmtiEnv* env, jlong tag) KERNEL_RETURN; | |
| 319 static void post_resource_exhausted(jint resource_exhausted_flags, const char* detail) KERNEL_RETURN; | |
| 320 static void record_vm_internal_object_allocation(oop object) KERNEL_RETURN; | |
| 321 // Post objects collected by vm_object_alloc_event_collector. | |
| 322 static void post_vm_object_alloc(JavaThread *thread, oop object) KERNEL_RETURN; | |
| 323 // Collects vm internal objects for later event posting. | |
| 324 inline static void vm_object_alloc_event_collector(oop object) { | |
| 325 if (should_post_vm_object_alloc()) { | |
| 326 record_vm_internal_object_allocation(object); | |
| 327 } | |
| 328 } | |
| 329 | |
| 330 static void cleanup_thread (JavaThread* thread) KERNEL_RETURN; | |
| 331 | |
| 332 static void oops_do(OopClosure* f) KERNEL_RETURN; | |
| 333 | |
| 334 static void transition_pending_onload_raw_monitors() KERNEL_RETURN; | |
| 335 | |
| 336 #ifndef SERVICES_KERNEL | |
| 337 // attach support | |
| 338 static jint load_agent_library(AttachOperation* op, outputStream* out); | |
| 339 #endif // SERVICES_KERNEL | |
| 340 | |
| 341 // SetNativeMethodPrefix support | |
| 342 static char** get_all_native_method_prefixes(int* count_ptr); | |
| 343 | |
| 344 // call after CMS has completed referencing processing | |
| 345 static void cms_ref_processing_epilogue() KERNEL_RETURN; | |
| 346 }; | |
| 347 | |
| 348 // Support class used by JvmtiDynamicCodeEventCollector and others. It | |
| 349 // describes a single code blob by name and address range. | |
| 350 class JvmtiCodeBlobDesc : public CHeapObj { | |
| 351 private: | |
| 352 char _name[64]; | |
| 353 address _code_begin; | |
| 354 address _code_end; | |
| 355 | |
| 356 public: | |
| 357 JvmtiCodeBlobDesc(const char *name, address code_begin, address code_end) { | |
| 358 assert(name != NULL, "all code blobs must be named"); | |
| 359 strncpy(_name, name, sizeof(_name)); | |
| 360 _name[sizeof(_name)-1] = '\0'; | |
| 361 _code_begin = code_begin; | |
| 362 _code_end = code_end; | |
| 363 } | |
| 364 char* name() { return _name; } | |
| 365 address code_begin() { return _code_begin; } | |
| 366 address code_end() { return _code_end; } | |
| 367 }; | |
| 368 | |
| 369 // JvmtiEventCollector is a helper class to setup thread for | |
| 370 // event collection. | |
| 371 class JvmtiEventCollector : public StackObj { | |
| 372 private: | |
| 373 JvmtiEventCollector* _prev; // Save previous one to support nested event collector. | |
| 374 | |
| 375 public: | |
| 376 void setup_jvmti_thread_state(); // Set this collector in current thread. | |
| 377 void unset_jvmti_thread_state(); // Reset previous collector in current thread. | |
| 378 virtual bool is_dynamic_code_event() { return false; } | |
| 379 virtual bool is_vm_object_alloc_event(){ return false; } | |
| 380 JvmtiEventCollector *get_prev() { return _prev; } | |
| 381 }; | |
| 382 | |
| 383 // A JvmtiDynamicCodeEventCollector is a helper class for the JvmtiExport | |
| 384 // interface. It collects "dynamic code generated" events that are posted | |
| 385 // while holding locks. When the event collector goes out of scope the | |
| 386 // events will be posted. | |
| 387 // | |
| 388 // Usage :- | |
| 389 // | |
| 390 // { | |
| 391 // JvmtiDynamicCodeEventCollector event_collector; | |
| 392 // : | |
| 393 // { MutexLocker ml(...) | |
| 394 // : | |
| 395 // JvmtiExport::post_dynamic_code_generated_while_holding_locks(...) | |
| 396 // } | |
| 397 // // event collector goes out of scope => post events to profiler. | |
| 398 // } | |
| 399 | |
| 400 class JvmtiDynamicCodeEventCollector : public JvmtiEventCollector { | |
| 401 private: | |
| 402 GrowableArray<JvmtiCodeBlobDesc*>* _code_blobs; // collected code blob events | |
| 403 | |
| 404 friend class JvmtiExport; | |
| 405 void register_stub(const char* name, address start, address end); | |
| 406 | |
| 407 public: | |
| 408 JvmtiDynamicCodeEventCollector() KERNEL_RETURN; | |
| 409 ~JvmtiDynamicCodeEventCollector() KERNEL_RETURN; | |
| 410 bool is_dynamic_code_event() { return true; } | |
| 411 | |
| 412 }; | |
| 413 | |
| 414 // Used to record vm internally allocated object oops and post | |
| 415 // vm object alloc event for objects visible to java world. | |
| 416 // Constructor enables JvmtiThreadState flag and all vm allocated | |
| 417 // objects are recorded in a growable array. When destructor is | |
| 418 // called the vm object alloc event is posted for each objects | |
| 419 // visible to java world. | |
| 420 // See jvm.cpp file for its usage. | |
| 421 // | |
| 422 class JvmtiVMObjectAllocEventCollector : public JvmtiEventCollector { | |
| 423 private: | |
| 424 GrowableArray<oop>* _allocated; // field to record vm internally allocated object oop. | |
| 425 bool _enable; // This flag is enabled in constructor and disabled | |
| 426 // in destructor before posting event. To avoid | |
| 427 // collection of objects allocated while running java code inside | |
| 428 // agent post_vm_object_alloc() event handler. | |
| 429 | |
| 430 //GC support | |
| 431 void oops_do(OopClosure* f); | |
| 432 | |
| 433 friend class JvmtiExport; | |
| 434 // Record vm allocated object oop. | |
| 435 inline void record_allocation(oop obj); | |
| 436 | |
| 437 //GC support | |
| 438 static void oops_do_for_all_threads(OopClosure* f); | |
| 439 | |
| 440 public: | |
| 441 JvmtiVMObjectAllocEventCollector() KERNEL_RETURN; | |
| 442 ~JvmtiVMObjectAllocEventCollector() KERNEL_RETURN; | |
| 443 bool is_vm_object_alloc_event() { return true; } | |
| 444 | |
| 445 bool is_enabled() { return _enable; } | |
| 446 void set_enabled(bool on) { _enable = on; } | |
| 447 }; | |
| 448 | |
| 449 | |
| 450 | |
| 451 // Marker class to disable the posting of VMObjectAlloc events | |
| 452 // within its scope. | |
| 453 // | |
| 454 // Usage :- | |
| 455 // | |
| 456 // { | |
| 457 // NoJvmtiVMObjectAllocMark njm; | |
| 458 // : | |
| 459 // // VMObjAlloc event will not be posted | |
| 460 // JvmtiExport::vm_object_alloc_event_collector(obj); | |
| 461 // : | |
| 462 // } | |
| 463 | |
| 464 class NoJvmtiVMObjectAllocMark : public StackObj { | |
| 465 private: | |
| 466 // enclosing collector if enabled, NULL otherwise | |
| 467 JvmtiVMObjectAllocEventCollector *_collector; | |
| 468 | |
| 469 bool was_enabled() { return _collector != NULL; } | |
| 470 | |
| 471 public: | |
| 472 NoJvmtiVMObjectAllocMark() KERNEL_RETURN; | |
| 473 ~NoJvmtiVMObjectAllocMark() KERNEL_RETURN; | |
| 474 }; | |
| 475 | |
| 476 | |
| 477 // Base class for reporting GC events to JVMTI. | |
| 478 class JvmtiGCMarker : public StackObj { | |
| 479 private: | |
| 480 bool _full; // marks a "full" GC | |
| 481 unsigned int _invocation_count; // GC invocation count | |
| 482 protected: | |
| 483 JvmtiGCMarker(bool full) KERNEL_RETURN; // protected | |
| 484 ~JvmtiGCMarker() KERNEL_RETURN; // protected | |
| 485 }; | |
| 486 | |
| 487 | |
| 488 // Support class used to report GC events to JVMTI. The class is stack | |
| 489 // allocated and should be placed in the doit() implementation of all | |
| 490 // vm operations that do a stop-the-world GC for failed allocation. | |
| 491 // | |
| 492 // Usage :- | |
| 493 // | |
| 494 // void VM_GenCollectForAllocation::doit() { | |
| 495 // JvmtiGCForAllocationMarker jgcm; | |
| 496 // : | |
| 497 // } | |
| 498 // | |
| 499 // If jvmti is not enabled the constructor and destructor is essentially | |
| 500 // a no-op (no overhead). | |
| 501 // | |
| 502 class JvmtiGCForAllocationMarker : public JvmtiGCMarker { | |
| 503 public: | |
| 504 JvmtiGCForAllocationMarker() : JvmtiGCMarker(false) { | |
| 505 } | |
| 506 }; | |
| 507 | |
| 508 // Support class used to report GC events to JVMTI. The class is stack | |
| 509 // allocated and should be placed in the doit() implementation of all | |
| 510 // vm operations that do a "full" stop-the-world GC. This class differs | |
| 511 // from JvmtiGCForAllocationMarker in that this class assumes that a | |
| 512 // "full" GC will happen. | |
| 513 // | |
| 514 // Usage :- | |
| 515 // | |
| 516 // void VM_GenCollectFull::doit() { | |
| 517 // JvmtiGCFullMarker jgcm; | |
| 518 // : | |
| 519 // } | |
| 520 // | |
| 521 class JvmtiGCFullMarker : public JvmtiGCMarker { | |
| 522 public: | |
| 523 JvmtiGCFullMarker() : JvmtiGCMarker(true) { | |
| 524 } | |
| 525 }; | |
| 526 | |
| 527 | |
| 528 // JvmtiHideSingleStepping is a helper class for hiding | |
| 529 // internal single step events. | |
| 530 class JvmtiHideSingleStepping : public StackObj { | |
| 531 private: | |
| 532 bool _single_step_hidden; | |
| 533 JavaThread * _thread; | |
| 534 | |
| 535 public: | |
| 536 JvmtiHideSingleStepping(JavaThread * thread) { | |
| 537 assert(thread != NULL, "sanity check"); | |
| 538 | |
| 539 _single_step_hidden = false; | |
| 540 _thread = thread; | |
| 541 if (JvmtiExport::should_post_single_step()) { | |
| 542 _single_step_hidden = JvmtiExport::hide_single_stepping(_thread); | |
| 543 } | |
| 544 } | |
| 545 | |
| 546 ~JvmtiHideSingleStepping() { | |
| 547 if (_single_step_hidden) { | |
| 548 JvmtiExport::expose_single_stepping(_thread); | |
| 549 } | |
| 550 } | |
| 551 }; | |
| 552 | |
| 553 #endif /* _JAVA_JVMTIEXPORT_H_ */ |