0
|
1 /*
|
|
2 * Copyright 1998-2006 Sun Microsystems, Inc. All Rights Reserved.
|
|
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
|
|
4 *
|
|
5 * This code is free software; you can redistribute it and/or modify it
|
|
6 * under the terms of the GNU General Public License version 2 only, as
|
|
7 * published by the Free Software Foundation.
|
|
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 *
|
|
19 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
|
|
20 * CA 95054 USA or visit www.sun.com if you need additional information or
|
|
21 * have any questions.
|
|
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_examine_or_deopt_anywhere;
|
|
62 static bool _can_hotswap_or_post_breakpoint;
|
|
63 static bool _can_modify_any_class;
|
|
64 static bool _can_walk_any_space;
|
|
65
|
|
66 JVMTI_SUPPORT_FLAG(can_get_source_debug_extension)
|
|
67 JVMTI_SUPPORT_FLAG(can_maintain_original_method_order)
|
|
68 JVMTI_SUPPORT_FLAG(can_post_interpreter_events)
|
|
69 JVMTI_SUPPORT_FLAG(can_post_exceptions)
|
|
70 JVMTI_SUPPORT_FLAG(can_post_breakpoint)
|
|
71 JVMTI_SUPPORT_FLAG(can_post_field_access)
|
|
72 JVMTI_SUPPORT_FLAG(can_post_field_modification)
|
|
73 JVMTI_SUPPORT_FLAG(can_post_method_entry)
|
|
74 JVMTI_SUPPORT_FLAG(can_post_method_exit)
|
|
75 JVMTI_SUPPORT_FLAG(can_pop_frame)
|
|
76 JVMTI_SUPPORT_FLAG(can_force_early_return)
|
|
77
|
|
78 friend class JvmtiEventControllerPrivate; // should only modify these flags
|
|
79 JVMTI_SUPPORT_FLAG(should_post_single_step)
|
|
80 JVMTI_SUPPORT_FLAG(should_post_field_access)
|
|
81 JVMTI_SUPPORT_FLAG(should_post_field_modification)
|
|
82 JVMTI_SUPPORT_FLAG(should_post_class_load)
|
|
83 JVMTI_SUPPORT_FLAG(should_post_class_prepare)
|
|
84 JVMTI_SUPPORT_FLAG(should_post_class_unload)
|
|
85 JVMTI_SUPPORT_FLAG(should_post_native_method_bind)
|
|
86 JVMTI_SUPPORT_FLAG(should_post_compiled_method_load)
|
|
87 JVMTI_SUPPORT_FLAG(should_post_compiled_method_unload)
|
|
88 JVMTI_SUPPORT_FLAG(should_post_dynamic_code_generated)
|
|
89 JVMTI_SUPPORT_FLAG(should_post_monitor_contended_enter)
|
|
90 JVMTI_SUPPORT_FLAG(should_post_monitor_contended_entered)
|
|
91 JVMTI_SUPPORT_FLAG(should_post_monitor_wait)
|
|
92 JVMTI_SUPPORT_FLAG(should_post_monitor_waited)
|
|
93 JVMTI_SUPPORT_FLAG(should_post_data_dump)
|
|
94 JVMTI_SUPPORT_FLAG(should_post_garbage_collection_start)
|
|
95 JVMTI_SUPPORT_FLAG(should_post_garbage_collection_finish)
|
|
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_examine_or_deopt_anywhere(bool on) { _can_examine_or_deopt_anywhere = (on != 0); }
|
|
115 inline static void set_can_modify_any_class(bool on) { _can_modify_any_class = (on != 0); }
|
|
116 inline static void set_can_access_local_variables(bool on) { _can_access_local_variables = (on != 0); }
|
|
117 inline static void set_can_hotswap_or_post_breakpoint(bool on) { _can_hotswap_or_post_breakpoint = (on != 0); }
|
|
118 inline static void set_can_walk_any_space(bool on) { _can_walk_any_space = (on != 0); }
|
|
119
|
|
120 enum {
|
|
121 JVMTI_VERSION_MASK = 0x70000000,
|
|
122 JVMTI_VERSION_VALUE = 0x30000000,
|
|
123 JVMDI_VERSION_VALUE = 0x20000000
|
|
124 };
|
|
125
|
|
126 static void post_field_modification(JavaThread *thread, methodOop method, address location,
|
|
127 KlassHandle field_klass, Handle object, jfieldID field,
|
|
128 char sig_type, jvalue *value);
|
|
129
|
|
130
|
|
131 private:
|
|
132 // CompiledMethodUnload events are reported from the VM thread so they
|
|
133 // are collected in lists (of jmethodID/addresses) and the events are posted later
|
|
134 // from threads posting CompieldMethodLoad or DynamicCodeGenerated events.
|
|
135 static bool _have_pending_compiled_method_unload_events;
|
|
136 static GrowableArray<jmethodID>* _pending_compiled_method_unload_method_ids;
|
|
137 static GrowableArray<const void *>* _pending_compiled_method_unload_code_begins;
|
|
138 static JavaThread* _current_poster;
|
|
139
|
|
140 // tests if there are CompiledMethodUnload events pending
|
|
141 inline static bool have_pending_compiled_method_unload_events() {
|
|
142 return _have_pending_compiled_method_unload_events;
|
|
143 }
|
|
144
|
|
145 // posts any pending CompiledMethodUnload events.
|
|
146 static void post_pending_compiled_method_unload_events();
|
|
147
|
|
148 // posts a DynamicCodeGenerated event (internal/private implementation).
|
|
149 // The public post_dynamic_code_generated* functions make use of the
|
|
150 // internal implementation.
|
|
151 static void post_dynamic_code_generated_internal(const char *name, const void *code_begin, const void *code_end) KERNEL_RETURN;
|
|
152
|
|
153
|
|
154 // GenerateEvents support to allow posting of CompiledMethodLoad and
|
|
155 // DynamicCodeGenerated events for a given environment.
|
|
156 friend class JvmtiCodeBlobEvents;
|
|
157
|
|
158 static void post_compiled_method_load(JvmtiEnv* env, const jmethodID method, const jint length,
|
|
159 const void *code_begin, const jint map_length,
|
|
160 const jvmtiAddrLocationMap* map) KERNEL_RETURN;
|
|
161 static void post_dynamic_code_generated(JvmtiEnv* env, const char *name, const void *code_begin,
|
|
162 const void *code_end) KERNEL_RETURN;
|
|
163
|
|
164 // The RedefineClasses() API breaks some invariants in the "regular"
|
|
165 // system. For example, there are sanity checks when GC'ing nmethods
|
|
166 // that require the containing class to be unloading. However, when a
|
|
167 // method is redefined, the old method and nmethod can become GC'able
|
|
168 // without the containing class unloading. The state of becoming
|
|
169 // GC'able can be asynchronous to the RedefineClasses() call since
|
|
170 // the old method may still be running and cannot be GC'ed until
|
|
171 // after all old invocations have finished. Additionally, a method
|
|
172 // that has not been redefined may have an nmethod that depends on
|
|
173 // the redefined method. The dependent nmethod will get deopted in
|
|
174 // this case and may also be GC'able without the containing class
|
|
175 // being unloaded.
|
|
176 //
|
|
177 // This flag indicates whether RedefineClasses() has ever redefined
|
|
178 // one or more classes during the lifetime of the VM. The flag should
|
|
179 // only be set by the friend class and can be queried by other sub
|
|
180 // systems as needed to relax invariant checks.
|
|
181 static bool _has_redefined_a_class;
|
|
182 friend class VM_RedefineClasses;
|
|
183 inline static void set_has_redefined_a_class() {
|
|
184 _has_redefined_a_class = true;
|
|
185 }
|
|
186
|
|
187 // Flag to indicate if the compiler has recorded all dependencies. When the
|
|
188 // can_redefine_classes capability is enabled in the OnLoad phase then the compiler
|
|
189 // records all dependencies from startup. However if the capability is first
|
|
190 // enabled some time later then the dependencies recorded by the compiler
|
|
191 // are incomplete. This flag is used by RedefineClasses to know if the
|
|
192 // dependency information is complete or not.
|
|
193 static bool _all_dependencies_are_recorded;
|
|
194
|
|
195 public:
|
|
196 inline static bool has_redefined_a_class() {
|
|
197 return _has_redefined_a_class;
|
|
198 }
|
|
199
|
|
200 inline static bool all_dependencies_are_recorded() {
|
|
201 return _all_dependencies_are_recorded;
|
|
202 }
|
|
203
|
|
204 inline static void set_all_dependencies_are_recorded(bool on) {
|
|
205 _all_dependencies_are_recorded = (on != 0);
|
|
206 }
|
|
207
|
|
208
|
|
209 // let JVMTI know that the JVM_OnLoad code is running
|
|
210 static void enter_onload_phase();
|
|
211
|
|
212 // let JVMTI know that the VM isn't up yet (and JVM_OnLoad code isn't running)
|
|
213 static void enter_primordial_phase();
|
|
214
|
|
215 // let JVMTI know that the VM isn't up yet but JNI is live
|
|
216 static void enter_start_phase();
|
|
217
|
|
218 // let JVMTI know that the VM is fully up and running now
|
|
219 static void enter_live_phase();
|
|
220
|
|
221 // ------ can_* conditions (below) are set at OnLoad and never changed ------------
|
|
222 inline static bool can_examine_or_deopt_anywhere() { return _can_examine_or_deopt_anywhere; }
|
|
223 inline static bool can_modify_any_class() { return _can_modify_any_class; }
|
|
224 inline static bool can_access_local_variables() { return _can_access_local_variables; }
|
|
225 inline static bool can_hotswap_or_post_breakpoint() { return _can_hotswap_or_post_breakpoint; }
|
|
226 inline static bool can_walk_any_space() { return _can_walk_any_space; }
|
|
227
|
|
228 // field access management
|
|
229 static address get_field_access_count_addr();
|
|
230
|
|
231 // field modification management
|
|
232 static address get_field_modification_count_addr();
|
|
233
|
|
234 // -----------------
|
|
235
|
|
236 static bool is_jvmti_version(jint version) { return (version & JVMTI_VERSION_MASK) == JVMTI_VERSION_VALUE; }
|
|
237 static bool is_jvmdi_version(jint version) { return (version & JVMTI_VERSION_MASK) == JVMDI_VERSION_VALUE; }
|
|
238 static jint get_jvmti_interface(JavaVM *jvm, void **penv, jint version);
|
|
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_ */
|