src/share/vm/prims/jvmtiExport.hpp

Tue, 08 Apr 2008 12:23:15 -0400

author
sgoldman
date
Tue, 08 Apr 2008 12:23:15 -0400
changeset 542
93b6525e3b82
parent 435
a61af66fc99e
child 1556
98cd9901c161
permissions
-rw-r--r--

6603919: Stackwalking crash on x86 -server with Sun Studio's collect -j on
Summary: Rewrite frame::safe_for_sender and friends to be safe for collector/analyzer
Reviewed-by: dcubed, kvn

duke@435 1 /*
duke@435 2 * Copyright 1998-2006 Sun Microsystems, Inc. All Rights Reserved.
duke@435 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
duke@435 4 *
duke@435 5 * This code is free software; you can redistribute it and/or modify it
duke@435 6 * under the terms of the GNU General Public License version 2 only, as
duke@435 7 * published by the Free Software Foundation.
duke@435 8 *
duke@435 9 * This code is distributed in the hope that it will be useful, but WITHOUT
duke@435 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
duke@435 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
duke@435 12 * version 2 for more details (a copy is included in the LICENSE file that
duke@435 13 * accompanied this code).
duke@435 14 *
duke@435 15 * You should have received a copy of the GNU General Public License version
duke@435 16 * 2 along with this work; if not, write to the Free Software Foundation,
duke@435 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
duke@435 18 *
duke@435 19 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
duke@435 20 * CA 95054 USA or visit www.sun.com if you need additional information or
duke@435 21 * have any questions.
duke@435 22 *
duke@435 23 */
duke@435 24
duke@435 25 #ifndef _JAVA_JVMTIEXPORT_H_
duke@435 26 #define _JAVA_JVMTIEXPORT_H_
duke@435 27
duke@435 28 // Forward declarations
duke@435 29
duke@435 30 class JvmtiEventControllerPrivate;
duke@435 31 class JvmtiManageCapabilities;
duke@435 32 class JvmtiEnv;
duke@435 33 class JvmtiThreadState;
duke@435 34 class AttachOperation;
duke@435 35
duke@435 36 #ifndef JVMTI_KERNEL
duke@435 37 #define JVMTI_SUPPORT_FLAG(key) \
duke@435 38 private: \
duke@435 39 static bool _##key; \
duke@435 40 public: \
duke@435 41 inline static void set_##key(bool on) { _##key = (on != 0); } \
duke@435 42 inline static bool key() { return _##key; }
duke@435 43 #else // JVMTI_KERNEL
duke@435 44 #define JVMTI_SUPPORT_FLAG(key) \
duke@435 45 private: \
duke@435 46 const static bool _##key = false; \
duke@435 47 public: \
duke@435 48 inline static void set_##key(bool on) { report_unsupported(on); } \
duke@435 49 inline static bool key() { return _##key; }
duke@435 50 #endif // JVMTI_KERNEL
duke@435 51
duke@435 52
duke@435 53 // This class contains the JVMTI interface for the rest of hotspot.
duke@435 54 //
duke@435 55 class JvmtiExport : public AllStatic {
duke@435 56 private:
duke@435 57 static int _field_access_count;
duke@435 58 static int _field_modification_count;
duke@435 59
duke@435 60 static bool _can_access_local_variables;
duke@435 61 static bool _can_examine_or_deopt_anywhere;
duke@435 62 static bool _can_hotswap_or_post_breakpoint;
duke@435 63 static bool _can_modify_any_class;
duke@435 64 static bool _can_walk_any_space;
duke@435 65
duke@435 66 JVMTI_SUPPORT_FLAG(can_get_source_debug_extension)
duke@435 67 JVMTI_SUPPORT_FLAG(can_maintain_original_method_order)
duke@435 68 JVMTI_SUPPORT_FLAG(can_post_interpreter_events)
duke@435 69 JVMTI_SUPPORT_FLAG(can_post_exceptions)
duke@435 70 JVMTI_SUPPORT_FLAG(can_post_breakpoint)
duke@435 71 JVMTI_SUPPORT_FLAG(can_post_field_access)
duke@435 72 JVMTI_SUPPORT_FLAG(can_post_field_modification)
duke@435 73 JVMTI_SUPPORT_FLAG(can_post_method_entry)
duke@435 74 JVMTI_SUPPORT_FLAG(can_post_method_exit)
duke@435 75 JVMTI_SUPPORT_FLAG(can_pop_frame)
duke@435 76 JVMTI_SUPPORT_FLAG(can_force_early_return)
duke@435 77
duke@435 78 friend class JvmtiEventControllerPrivate; // should only modify these flags
duke@435 79 JVMTI_SUPPORT_FLAG(should_post_single_step)
duke@435 80 JVMTI_SUPPORT_FLAG(should_post_field_access)
duke@435 81 JVMTI_SUPPORT_FLAG(should_post_field_modification)
duke@435 82 JVMTI_SUPPORT_FLAG(should_post_class_load)
duke@435 83 JVMTI_SUPPORT_FLAG(should_post_class_prepare)
duke@435 84 JVMTI_SUPPORT_FLAG(should_post_class_unload)
duke@435 85 JVMTI_SUPPORT_FLAG(should_post_native_method_bind)
duke@435 86 JVMTI_SUPPORT_FLAG(should_post_compiled_method_load)
duke@435 87 JVMTI_SUPPORT_FLAG(should_post_compiled_method_unload)
duke@435 88 JVMTI_SUPPORT_FLAG(should_post_dynamic_code_generated)
duke@435 89 JVMTI_SUPPORT_FLAG(should_post_monitor_contended_enter)
duke@435 90 JVMTI_SUPPORT_FLAG(should_post_monitor_contended_entered)
duke@435 91 JVMTI_SUPPORT_FLAG(should_post_monitor_wait)
duke@435 92 JVMTI_SUPPORT_FLAG(should_post_monitor_waited)
duke@435 93 JVMTI_SUPPORT_FLAG(should_post_data_dump)
duke@435 94 JVMTI_SUPPORT_FLAG(should_post_garbage_collection_start)
duke@435 95 JVMTI_SUPPORT_FLAG(should_post_garbage_collection_finish)
duke@435 96
duke@435 97 // ------ the below maybe don't have to be (but are for now)
duke@435 98 // fixed conditions here ------------
duke@435 99 // any events can be enabled
duke@435 100 JVMTI_SUPPORT_FLAG(should_post_thread_life)
duke@435 101 JVMTI_SUPPORT_FLAG(should_post_object_free)
duke@435 102 JVMTI_SUPPORT_FLAG(should_post_resource_exhausted)
duke@435 103
duke@435 104 // we are holding objects on the heap - need to talk to GC - e.g.
duke@435 105 // breakpoint info
duke@435 106 JVMTI_SUPPORT_FLAG(should_clean_up_heap_objects)
duke@435 107 JVMTI_SUPPORT_FLAG(should_post_vm_object_alloc)
duke@435 108
duke@435 109 // If flag cannot be implemented, give an error if on=true
duke@435 110 static void report_unsupported(bool on);
duke@435 111
duke@435 112 // these should only be called by the friend class
duke@435 113 friend class JvmtiManageCapabilities;
duke@435 114 inline static void set_can_examine_or_deopt_anywhere(bool on) { _can_examine_or_deopt_anywhere = (on != 0); }
duke@435 115 inline static void set_can_modify_any_class(bool on) { _can_modify_any_class = (on != 0); }
duke@435 116 inline static void set_can_access_local_variables(bool on) { _can_access_local_variables = (on != 0); }
duke@435 117 inline static void set_can_hotswap_or_post_breakpoint(bool on) { _can_hotswap_or_post_breakpoint = (on != 0); }
duke@435 118 inline static void set_can_walk_any_space(bool on) { _can_walk_any_space = (on != 0); }
duke@435 119
duke@435 120 enum {
duke@435 121 JVMTI_VERSION_MASK = 0x70000000,
duke@435 122 JVMTI_VERSION_VALUE = 0x30000000,
duke@435 123 JVMDI_VERSION_VALUE = 0x20000000
duke@435 124 };
duke@435 125
duke@435 126 static void post_field_modification(JavaThread *thread, methodOop method, address location,
duke@435 127 KlassHandle field_klass, Handle object, jfieldID field,
duke@435 128 char sig_type, jvalue *value);
duke@435 129
duke@435 130
duke@435 131 private:
duke@435 132 // CompiledMethodUnload events are reported from the VM thread so they
duke@435 133 // are collected in lists (of jmethodID/addresses) and the events are posted later
duke@435 134 // from threads posting CompieldMethodLoad or DynamicCodeGenerated events.
duke@435 135 static bool _have_pending_compiled_method_unload_events;
duke@435 136 static GrowableArray<jmethodID>* _pending_compiled_method_unload_method_ids;
duke@435 137 static GrowableArray<const void *>* _pending_compiled_method_unload_code_begins;
duke@435 138 static JavaThread* _current_poster;
duke@435 139
duke@435 140 // tests if there are CompiledMethodUnload events pending
duke@435 141 inline static bool have_pending_compiled_method_unload_events() {
duke@435 142 return _have_pending_compiled_method_unload_events;
duke@435 143 }
duke@435 144
duke@435 145 // posts any pending CompiledMethodUnload events.
duke@435 146 static void post_pending_compiled_method_unload_events();
duke@435 147
duke@435 148 // posts a DynamicCodeGenerated event (internal/private implementation).
duke@435 149 // The public post_dynamic_code_generated* functions make use of the
duke@435 150 // internal implementation.
duke@435 151 static void post_dynamic_code_generated_internal(const char *name, const void *code_begin, const void *code_end) KERNEL_RETURN;
duke@435 152
duke@435 153
duke@435 154 // GenerateEvents support to allow posting of CompiledMethodLoad and
duke@435 155 // DynamicCodeGenerated events for a given environment.
duke@435 156 friend class JvmtiCodeBlobEvents;
duke@435 157
duke@435 158 static void post_compiled_method_load(JvmtiEnv* env, const jmethodID method, const jint length,
duke@435 159 const void *code_begin, const jint map_length,
duke@435 160 const jvmtiAddrLocationMap* map) KERNEL_RETURN;
duke@435 161 static void post_dynamic_code_generated(JvmtiEnv* env, const char *name, const void *code_begin,
duke@435 162 const void *code_end) KERNEL_RETURN;
duke@435 163
duke@435 164 // The RedefineClasses() API breaks some invariants in the "regular"
duke@435 165 // system. For example, there are sanity checks when GC'ing nmethods
duke@435 166 // that require the containing class to be unloading. However, when a
duke@435 167 // method is redefined, the old method and nmethod can become GC'able
duke@435 168 // without the containing class unloading. The state of becoming
duke@435 169 // GC'able can be asynchronous to the RedefineClasses() call since
duke@435 170 // the old method may still be running and cannot be GC'ed until
duke@435 171 // after all old invocations have finished. Additionally, a method
duke@435 172 // that has not been redefined may have an nmethod that depends on
duke@435 173 // the redefined method. The dependent nmethod will get deopted in
duke@435 174 // this case and may also be GC'able without the containing class
duke@435 175 // being unloaded.
duke@435 176 //
duke@435 177 // This flag indicates whether RedefineClasses() has ever redefined
duke@435 178 // one or more classes during the lifetime of the VM. The flag should
duke@435 179 // only be set by the friend class and can be queried by other sub
duke@435 180 // systems as needed to relax invariant checks.
duke@435 181 static bool _has_redefined_a_class;
duke@435 182 friend class VM_RedefineClasses;
duke@435 183 inline static void set_has_redefined_a_class() {
duke@435 184 _has_redefined_a_class = true;
duke@435 185 }
duke@435 186
duke@435 187 // Flag to indicate if the compiler has recorded all dependencies. When the
duke@435 188 // can_redefine_classes capability is enabled in the OnLoad phase then the compiler
duke@435 189 // records all dependencies from startup. However if the capability is first
duke@435 190 // enabled some time later then the dependencies recorded by the compiler
duke@435 191 // are incomplete. This flag is used by RedefineClasses to know if the
duke@435 192 // dependency information is complete or not.
duke@435 193 static bool _all_dependencies_are_recorded;
duke@435 194
duke@435 195 public:
duke@435 196 inline static bool has_redefined_a_class() {
duke@435 197 return _has_redefined_a_class;
duke@435 198 }
duke@435 199
duke@435 200 inline static bool all_dependencies_are_recorded() {
duke@435 201 return _all_dependencies_are_recorded;
duke@435 202 }
duke@435 203
duke@435 204 inline static void set_all_dependencies_are_recorded(bool on) {
duke@435 205 _all_dependencies_are_recorded = (on != 0);
duke@435 206 }
duke@435 207
duke@435 208
duke@435 209 // let JVMTI know that the JVM_OnLoad code is running
duke@435 210 static void enter_onload_phase();
duke@435 211
duke@435 212 // let JVMTI know that the VM isn't up yet (and JVM_OnLoad code isn't running)
duke@435 213 static void enter_primordial_phase();
duke@435 214
duke@435 215 // let JVMTI know that the VM isn't up yet but JNI is live
duke@435 216 static void enter_start_phase();
duke@435 217
duke@435 218 // let JVMTI know that the VM is fully up and running now
duke@435 219 static void enter_live_phase();
duke@435 220
duke@435 221 // ------ can_* conditions (below) are set at OnLoad and never changed ------------
duke@435 222 inline static bool can_examine_or_deopt_anywhere() { return _can_examine_or_deopt_anywhere; }
duke@435 223 inline static bool can_modify_any_class() { return _can_modify_any_class; }
duke@435 224 inline static bool can_access_local_variables() { return _can_access_local_variables; }
duke@435 225 inline static bool can_hotswap_or_post_breakpoint() { return _can_hotswap_or_post_breakpoint; }
duke@435 226 inline static bool can_walk_any_space() { return _can_walk_any_space; }
duke@435 227
duke@435 228 // field access management
duke@435 229 static address get_field_access_count_addr();
duke@435 230
duke@435 231 // field modification management
duke@435 232 static address get_field_modification_count_addr();
duke@435 233
duke@435 234 // -----------------
duke@435 235
duke@435 236 static bool is_jvmti_version(jint version) { return (version & JVMTI_VERSION_MASK) == JVMTI_VERSION_VALUE; }
duke@435 237 static bool is_jvmdi_version(jint version) { return (version & JVMTI_VERSION_MASK) == JVMDI_VERSION_VALUE; }
duke@435 238 static jint get_jvmti_interface(JavaVM *jvm, void **penv, jint version);
duke@435 239
duke@435 240 // single stepping management methods
duke@435 241 static void at_single_stepping_point(JavaThread *thread, methodOop method, address location) KERNEL_RETURN;
duke@435 242 static void expose_single_stepping(JavaThread *thread) KERNEL_RETURN;
duke@435 243 static bool hide_single_stepping(JavaThread *thread) KERNEL_RETURN_(return false;);
duke@435 244
duke@435 245 // Methods that notify the debugger that something interesting has happened in the VM.
duke@435 246 static void post_vm_start ();
duke@435 247 static void post_vm_initialized ();
duke@435 248 static void post_vm_death ();
duke@435 249
duke@435 250 static void post_single_step (JavaThread *thread, methodOop method, address location) KERNEL_RETURN;
duke@435 251 static void post_raw_breakpoint (JavaThread *thread, methodOop method, address location) KERNEL_RETURN;
duke@435 252
duke@435 253 static void post_exception_throw (JavaThread *thread, methodOop method, address location, oop exception) KERNEL_RETURN;
duke@435 254 static void notice_unwind_due_to_exception (JavaThread *thread, methodOop method, address location, oop exception, bool in_handler_frame) KERNEL_RETURN;
duke@435 255
duke@435 256 static oop jni_GetField_probe (JavaThread *thread, jobject jobj,
duke@435 257 oop obj, klassOop klass, jfieldID fieldID, bool is_static)
duke@435 258 KERNEL_RETURN_(return NULL;);
duke@435 259 static oop jni_GetField_probe_nh (JavaThread *thread, jobject jobj,
duke@435 260 oop obj, klassOop klass, jfieldID fieldID, bool is_static)
duke@435 261 KERNEL_RETURN_(return NULL;);
duke@435 262 static void post_field_access_by_jni (JavaThread *thread, oop obj,
duke@435 263 klassOop klass, jfieldID fieldID, bool is_static) KERNEL_RETURN;
duke@435 264 static void post_field_access (JavaThread *thread, methodOop method,
duke@435 265 address location, KlassHandle field_klass, Handle object, jfieldID field) KERNEL_RETURN;
duke@435 266 static oop jni_SetField_probe (JavaThread *thread, jobject jobj,
duke@435 267 oop obj, klassOop klass, jfieldID fieldID, bool is_static, char sig_type,
duke@435 268 jvalue *value) KERNEL_RETURN_(return NULL;);
duke@435 269 static oop jni_SetField_probe_nh (JavaThread *thread, jobject jobj,
duke@435 270 oop obj, klassOop klass, jfieldID fieldID, bool is_static, char sig_type,
duke@435 271 jvalue *value) KERNEL_RETURN_(return NULL;);
duke@435 272 static void post_field_modification_by_jni(JavaThread *thread, oop obj,
duke@435 273 klassOop klass, jfieldID fieldID, bool is_static, char sig_type,
duke@435 274 jvalue *value);
duke@435 275 static void post_raw_field_modification(JavaThread *thread, methodOop method,
duke@435 276 address location, KlassHandle field_klass, Handle object, jfieldID field,
duke@435 277 char sig_type, jvalue *value) KERNEL_RETURN;
duke@435 278
duke@435 279 static void post_method_entry (JavaThread *thread, methodOop method, frame current_frame) KERNEL_RETURN;
duke@435 280 static void post_method_exit (JavaThread *thread, methodOop method, frame current_frame) KERNEL_RETURN;
duke@435 281
duke@435 282 static void post_class_load (JavaThread *thread, klassOop klass) KERNEL_RETURN;
duke@435 283 static void post_class_unload (klassOop klass) KERNEL_RETURN;
duke@435 284 static void post_class_prepare (JavaThread *thread, klassOop klass) KERNEL_RETURN;
duke@435 285
duke@435 286 static void post_thread_start (JavaThread *thread) KERNEL_RETURN;
duke@435 287 static void post_thread_end (JavaThread *thread) KERNEL_RETURN;
duke@435 288
duke@435 289 // Support for java.lang.instrument agent loading.
duke@435 290 static bool _should_post_class_file_load_hook;
duke@435 291 inline static void set_should_post_class_file_load_hook(bool on) { _should_post_class_file_load_hook = on; }
duke@435 292 inline static bool should_post_class_file_load_hook() { return _should_post_class_file_load_hook; }
duke@435 293 static void post_class_file_load_hook(symbolHandle h_name, Handle class_loader,
duke@435 294 Handle h_protection_domain,
duke@435 295 unsigned char **data_ptr, unsigned char **end_ptr,
duke@435 296 unsigned char **cached_data_ptr,
duke@435 297 jint *cached_length_ptr);
duke@435 298 static void post_native_method_bind(methodOop method, address* function_ptr) KERNEL_RETURN;
duke@435 299 static void post_compiled_method_load(nmethod *nm) KERNEL_RETURN;
duke@435 300 static void post_dynamic_code_generated(const char *name, const void *code_begin, const void *code_end) KERNEL_RETURN;
duke@435 301
duke@435 302 // used at a safepoint to post a CompiledMethodUnload event
duke@435 303 static void post_compiled_method_unload_at_safepoint(jmethodID mid, const void *code_begin) KERNEL_RETURN;
duke@435 304
duke@435 305 // similiar to post_dynamic_code_generated except that it can be used to
duke@435 306 // post a DynamicCodeGenerated event while holding locks in the VM. Any event
duke@435 307 // posted using this function is recorded by the enclosing event collector
duke@435 308 // -- JvmtiDynamicCodeEventCollector.
duke@435 309 static void post_dynamic_code_generated_while_holding_locks(const char* name, address code_begin, address code_end) KERNEL_RETURN;
duke@435 310
duke@435 311 static void post_garbage_collection_finish() KERNEL_RETURN;
duke@435 312 static void post_garbage_collection_start() KERNEL_RETURN;
duke@435 313 static void post_data_dump() KERNEL_RETURN;
duke@435 314 static void post_monitor_contended_enter(JavaThread *thread, ObjectMonitor *obj_mntr) KERNEL_RETURN;
duke@435 315 static void post_monitor_contended_entered(JavaThread *thread, ObjectMonitor *obj_mntr) KERNEL_RETURN;
duke@435 316 static void post_monitor_wait(JavaThread *thread, oop obj, jlong timeout) KERNEL_RETURN;
duke@435 317 static void post_monitor_waited(JavaThread *thread, ObjectMonitor *obj_mntr, jboolean timed_out) KERNEL_RETURN;
duke@435 318 static void post_object_free(JvmtiEnv* env, jlong tag) KERNEL_RETURN;
duke@435 319 static void post_resource_exhausted(jint resource_exhausted_flags, const char* detail) KERNEL_RETURN;
duke@435 320 static void record_vm_internal_object_allocation(oop object) KERNEL_RETURN;
duke@435 321 // Post objects collected by vm_object_alloc_event_collector.
duke@435 322 static void post_vm_object_alloc(JavaThread *thread, oop object) KERNEL_RETURN;
duke@435 323 // Collects vm internal objects for later event posting.
duke@435 324 inline static void vm_object_alloc_event_collector(oop object) {
duke@435 325 if (should_post_vm_object_alloc()) {
duke@435 326 record_vm_internal_object_allocation(object);
duke@435 327 }
duke@435 328 }
duke@435 329
duke@435 330 static void cleanup_thread (JavaThread* thread) KERNEL_RETURN;
duke@435 331
duke@435 332 static void oops_do(OopClosure* f) KERNEL_RETURN;
duke@435 333
duke@435 334 static void transition_pending_onload_raw_monitors() KERNEL_RETURN;
duke@435 335
duke@435 336 #ifndef SERVICES_KERNEL
duke@435 337 // attach support
duke@435 338 static jint load_agent_library(AttachOperation* op, outputStream* out);
duke@435 339 #endif // SERVICES_KERNEL
duke@435 340
duke@435 341 // SetNativeMethodPrefix support
duke@435 342 static char** get_all_native_method_prefixes(int* count_ptr);
duke@435 343
duke@435 344 // call after CMS has completed referencing processing
duke@435 345 static void cms_ref_processing_epilogue() KERNEL_RETURN;
duke@435 346 };
duke@435 347
duke@435 348 // Support class used by JvmtiDynamicCodeEventCollector and others. It
duke@435 349 // describes a single code blob by name and address range.
duke@435 350 class JvmtiCodeBlobDesc : public CHeapObj {
duke@435 351 private:
duke@435 352 char _name[64];
duke@435 353 address _code_begin;
duke@435 354 address _code_end;
duke@435 355
duke@435 356 public:
duke@435 357 JvmtiCodeBlobDesc(const char *name, address code_begin, address code_end) {
duke@435 358 assert(name != NULL, "all code blobs must be named");
duke@435 359 strncpy(_name, name, sizeof(_name));
duke@435 360 _name[sizeof(_name)-1] = '\0';
duke@435 361 _code_begin = code_begin;
duke@435 362 _code_end = code_end;
duke@435 363 }
duke@435 364 char* name() { return _name; }
duke@435 365 address code_begin() { return _code_begin; }
duke@435 366 address code_end() { return _code_end; }
duke@435 367 };
duke@435 368
duke@435 369 // JvmtiEventCollector is a helper class to setup thread for
duke@435 370 // event collection.
duke@435 371 class JvmtiEventCollector : public StackObj {
duke@435 372 private:
duke@435 373 JvmtiEventCollector* _prev; // Save previous one to support nested event collector.
duke@435 374
duke@435 375 public:
duke@435 376 void setup_jvmti_thread_state(); // Set this collector in current thread.
duke@435 377 void unset_jvmti_thread_state(); // Reset previous collector in current thread.
duke@435 378 virtual bool is_dynamic_code_event() { return false; }
duke@435 379 virtual bool is_vm_object_alloc_event(){ return false; }
duke@435 380 JvmtiEventCollector *get_prev() { return _prev; }
duke@435 381 };
duke@435 382
duke@435 383 // A JvmtiDynamicCodeEventCollector is a helper class for the JvmtiExport
duke@435 384 // interface. It collects "dynamic code generated" events that are posted
duke@435 385 // while holding locks. When the event collector goes out of scope the
duke@435 386 // events will be posted.
duke@435 387 //
duke@435 388 // Usage :-
duke@435 389 //
duke@435 390 // {
duke@435 391 // JvmtiDynamicCodeEventCollector event_collector;
duke@435 392 // :
duke@435 393 // { MutexLocker ml(...)
duke@435 394 // :
duke@435 395 // JvmtiExport::post_dynamic_code_generated_while_holding_locks(...)
duke@435 396 // }
duke@435 397 // // event collector goes out of scope => post events to profiler.
duke@435 398 // }
duke@435 399
duke@435 400 class JvmtiDynamicCodeEventCollector : public JvmtiEventCollector {
duke@435 401 private:
duke@435 402 GrowableArray<JvmtiCodeBlobDesc*>* _code_blobs; // collected code blob events
duke@435 403
duke@435 404 friend class JvmtiExport;
duke@435 405 void register_stub(const char* name, address start, address end);
duke@435 406
duke@435 407 public:
duke@435 408 JvmtiDynamicCodeEventCollector() KERNEL_RETURN;
duke@435 409 ~JvmtiDynamicCodeEventCollector() KERNEL_RETURN;
duke@435 410 bool is_dynamic_code_event() { return true; }
duke@435 411
duke@435 412 };
duke@435 413
duke@435 414 // Used to record vm internally allocated object oops and post
duke@435 415 // vm object alloc event for objects visible to java world.
duke@435 416 // Constructor enables JvmtiThreadState flag and all vm allocated
duke@435 417 // objects are recorded in a growable array. When destructor is
duke@435 418 // called the vm object alloc event is posted for each objects
duke@435 419 // visible to java world.
duke@435 420 // See jvm.cpp file for its usage.
duke@435 421 //
duke@435 422 class JvmtiVMObjectAllocEventCollector : public JvmtiEventCollector {
duke@435 423 private:
duke@435 424 GrowableArray<oop>* _allocated; // field to record vm internally allocated object oop.
duke@435 425 bool _enable; // This flag is enabled in constructor and disabled
duke@435 426 // in destructor before posting event. To avoid
duke@435 427 // collection of objects allocated while running java code inside
duke@435 428 // agent post_vm_object_alloc() event handler.
duke@435 429
duke@435 430 //GC support
duke@435 431 void oops_do(OopClosure* f);
duke@435 432
duke@435 433 friend class JvmtiExport;
duke@435 434 // Record vm allocated object oop.
duke@435 435 inline void record_allocation(oop obj);
duke@435 436
duke@435 437 //GC support
duke@435 438 static void oops_do_for_all_threads(OopClosure* f);
duke@435 439
duke@435 440 public:
duke@435 441 JvmtiVMObjectAllocEventCollector() KERNEL_RETURN;
duke@435 442 ~JvmtiVMObjectAllocEventCollector() KERNEL_RETURN;
duke@435 443 bool is_vm_object_alloc_event() { return true; }
duke@435 444
duke@435 445 bool is_enabled() { return _enable; }
duke@435 446 void set_enabled(bool on) { _enable = on; }
duke@435 447 };
duke@435 448
duke@435 449
duke@435 450
duke@435 451 // Marker class to disable the posting of VMObjectAlloc events
duke@435 452 // within its scope.
duke@435 453 //
duke@435 454 // Usage :-
duke@435 455 //
duke@435 456 // {
duke@435 457 // NoJvmtiVMObjectAllocMark njm;
duke@435 458 // :
duke@435 459 // // VMObjAlloc event will not be posted
duke@435 460 // JvmtiExport::vm_object_alloc_event_collector(obj);
duke@435 461 // :
duke@435 462 // }
duke@435 463
duke@435 464 class NoJvmtiVMObjectAllocMark : public StackObj {
duke@435 465 private:
duke@435 466 // enclosing collector if enabled, NULL otherwise
duke@435 467 JvmtiVMObjectAllocEventCollector *_collector;
duke@435 468
duke@435 469 bool was_enabled() { return _collector != NULL; }
duke@435 470
duke@435 471 public:
duke@435 472 NoJvmtiVMObjectAllocMark() KERNEL_RETURN;
duke@435 473 ~NoJvmtiVMObjectAllocMark() KERNEL_RETURN;
duke@435 474 };
duke@435 475
duke@435 476
duke@435 477 // Base class for reporting GC events to JVMTI.
duke@435 478 class JvmtiGCMarker : public StackObj {
duke@435 479 private:
duke@435 480 bool _full; // marks a "full" GC
duke@435 481 unsigned int _invocation_count; // GC invocation count
duke@435 482 protected:
duke@435 483 JvmtiGCMarker(bool full) KERNEL_RETURN; // protected
duke@435 484 ~JvmtiGCMarker() KERNEL_RETURN; // protected
duke@435 485 };
duke@435 486
duke@435 487
duke@435 488 // Support class used to report GC events to JVMTI. The class is stack
duke@435 489 // allocated and should be placed in the doit() implementation of all
duke@435 490 // vm operations that do a stop-the-world GC for failed allocation.
duke@435 491 //
duke@435 492 // Usage :-
duke@435 493 //
duke@435 494 // void VM_GenCollectForAllocation::doit() {
duke@435 495 // JvmtiGCForAllocationMarker jgcm;
duke@435 496 // :
duke@435 497 // }
duke@435 498 //
duke@435 499 // If jvmti is not enabled the constructor and destructor is essentially
duke@435 500 // a no-op (no overhead).
duke@435 501 //
duke@435 502 class JvmtiGCForAllocationMarker : public JvmtiGCMarker {
duke@435 503 public:
duke@435 504 JvmtiGCForAllocationMarker() : JvmtiGCMarker(false) {
duke@435 505 }
duke@435 506 };
duke@435 507
duke@435 508 // Support class used to report GC events to JVMTI. The class is stack
duke@435 509 // allocated and should be placed in the doit() implementation of all
duke@435 510 // vm operations that do a "full" stop-the-world GC. This class differs
duke@435 511 // from JvmtiGCForAllocationMarker in that this class assumes that a
duke@435 512 // "full" GC will happen.
duke@435 513 //
duke@435 514 // Usage :-
duke@435 515 //
duke@435 516 // void VM_GenCollectFull::doit() {
duke@435 517 // JvmtiGCFullMarker jgcm;
duke@435 518 // :
duke@435 519 // }
duke@435 520 //
duke@435 521 class JvmtiGCFullMarker : public JvmtiGCMarker {
duke@435 522 public:
duke@435 523 JvmtiGCFullMarker() : JvmtiGCMarker(true) {
duke@435 524 }
duke@435 525 };
duke@435 526
duke@435 527
duke@435 528 // JvmtiHideSingleStepping is a helper class for hiding
duke@435 529 // internal single step events.
duke@435 530 class JvmtiHideSingleStepping : public StackObj {
duke@435 531 private:
duke@435 532 bool _single_step_hidden;
duke@435 533 JavaThread * _thread;
duke@435 534
duke@435 535 public:
duke@435 536 JvmtiHideSingleStepping(JavaThread * thread) {
duke@435 537 assert(thread != NULL, "sanity check");
duke@435 538
duke@435 539 _single_step_hidden = false;
duke@435 540 _thread = thread;
duke@435 541 if (JvmtiExport::should_post_single_step()) {
duke@435 542 _single_step_hidden = JvmtiExport::hide_single_stepping(_thread);
duke@435 543 }
duke@435 544 }
duke@435 545
duke@435 546 ~JvmtiHideSingleStepping() {
duke@435 547 if (_single_step_hidden) {
duke@435 548 JvmtiExport::expose_single_stepping(_thread);
duke@435 549 }
duke@435 550 }
duke@435 551 };
duke@435 552
duke@435 553 #endif /* _JAVA_JVMTIEXPORT_H_ */

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