Mercurial > hg > graal-compiler
annotate src/share/vm/prims/jvmtiEnv.cpp @ 935:05f89f00a864
6798898: CMS: bugs related to class unloading
Summary: Override should_remember_klasses() and remember_klass() as needed.
Reviewed-by: ysr, jcoomes
author | jmasa |
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date | Mon, 24 Aug 2009 10:36:31 -0700 |
parents | ea20d7ce26b0 |
children | dcb15a6f342d 4ce7240d622c |
rev | line source |
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0 | 1 /* |
2 * Copyright 2003-2007 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 | |
26 # include "incls/_precompiled.incl" | |
27 # include "incls/_jvmtiEnv.cpp.incl" | |
28 | |
29 | |
30 #define FIXLATER 0 // REMOVE this when completed. | |
31 | |
32 // FIXLATER: hook into JvmtiTrace | |
33 #define TraceJVMTICalls false | |
34 | |
35 JvmtiEnv::JvmtiEnv() : JvmtiEnvBase() { | |
36 } | |
37 | |
38 JvmtiEnv::~JvmtiEnv() { | |
39 } | |
40 | |
41 JvmtiEnv* | |
42 JvmtiEnv::create_a_jvmti() { | |
43 return new JvmtiEnv(); | |
44 } | |
45 | |
46 // VM operation class to copy jni function table at safepoint. | |
47 // More than one java threads or jvmti agents may be reading/ | |
48 // modifying jni function tables. To reduce the risk of bad | |
49 // interaction b/w these threads it is copied at safepoint. | |
50 class VM_JNIFunctionTableCopier : public VM_Operation { | |
51 private: | |
52 const struct JNINativeInterface_ *_function_table; | |
53 public: | |
54 VM_JNIFunctionTableCopier(const struct JNINativeInterface_ *func_tbl) { | |
55 _function_table = func_tbl; | |
56 }; | |
57 | |
58 VMOp_Type type() const { return VMOp_JNIFunctionTableCopier; } | |
59 void doit() { | |
60 copy_jni_function_table(_function_table); | |
61 }; | |
62 }; | |
63 | |
64 // | |
65 // Do not change the "prefix" marker below, everything above it is copied | |
66 // unchanged into the filled stub, everything below is controlled by the | |
67 // stub filler (only method bodies are carried forward, and then only for | |
68 // functionality still in the spec). | |
69 // | |
70 // end file prefix | |
71 | |
72 // | |
73 // Memory Management functions | |
74 // | |
75 | |
76 // mem_ptr - pre-checked for NULL | |
77 jvmtiError | |
78 JvmtiEnv::Allocate(jlong size, unsigned char** mem_ptr) { | |
79 return allocate(size, mem_ptr); | |
80 } /* end Allocate */ | |
81 | |
82 | |
83 // mem - NULL is a valid value, must be checked | |
84 jvmtiError | |
85 JvmtiEnv::Deallocate(unsigned char* mem) { | |
86 return deallocate(mem); | |
87 } /* end Deallocate */ | |
88 | |
89 // Threads_lock NOT held, java_thread not protected by lock | |
90 // java_thread - pre-checked | |
91 // data - NULL is a valid value, must be checked | |
92 jvmtiError | |
93 JvmtiEnv::SetThreadLocalStorage(JavaThread* java_thread, const void* data) { | |
94 JvmtiThreadState* state = java_thread->jvmti_thread_state(); | |
95 if (state == NULL) { | |
96 if (data == NULL) { | |
97 // leaving state unset same as data set to NULL | |
98 return JVMTI_ERROR_NONE; | |
99 } | |
100 // otherwise, create the state | |
101 state = JvmtiThreadState::state_for(java_thread); | |
609
ea20d7ce26b0
6800721: 3/4 JavaThread::jvmti_thread_state() and JvmtiThreadState::state_for() robustness
dcubed
parents:
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102 if (state == NULL) { |
ea20d7ce26b0
6800721: 3/4 JavaThread::jvmti_thread_state() and JvmtiThreadState::state_for() robustness
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103 return JVMTI_ERROR_THREAD_NOT_ALIVE; |
ea20d7ce26b0
6800721: 3/4 JavaThread::jvmti_thread_state() and JvmtiThreadState::state_for() robustness
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104 } |
0 | 105 } |
106 state->env_thread_state(this)->set_agent_thread_local_storage_data((void*)data); | |
107 return JVMTI_ERROR_NONE; | |
108 } /* end SetThreadLocalStorage */ | |
109 | |
110 | |
111 // Threads_lock NOT held | |
112 // thread - NOT pre-checked | |
113 // data_ptr - pre-checked for NULL | |
114 jvmtiError | |
115 JvmtiEnv::GetThreadLocalStorage(jthread thread, void** data_ptr) { | |
116 JavaThread* current_thread = JavaThread::current(); | |
117 if (thread == NULL) { | |
118 JvmtiThreadState* state = current_thread->jvmti_thread_state(); | |
119 *data_ptr = (state == NULL) ? NULL : | |
120 state->env_thread_state(this)->get_agent_thread_local_storage_data(); | |
121 } else { | |
122 | |
123 // jvmti_GetThreadLocalStorage is "in native" and doesn't transition | |
124 // the thread to _thread_in_vm. However, when the TLS for a thread | |
125 // other than the current thread is required we need to transition | |
126 // from native so as to resolve the jthread. | |
127 | |
128 ThreadInVMfromNative __tiv(current_thread); | |
129 __ENTRY(jvmtiError, JvmtiEnv::GetThreadLocalStorage , current_thread) | |
130 debug_only(VMNativeEntryWrapper __vew;) | |
131 | |
132 oop thread_oop = JNIHandles::resolve_external_guard(thread); | |
133 if (thread_oop == NULL) { | |
134 return JVMTI_ERROR_INVALID_THREAD; | |
135 } | |
136 if (!thread_oop->is_a(SystemDictionary::thread_klass())) { | |
137 return JVMTI_ERROR_INVALID_THREAD; | |
138 } | |
139 JavaThread* java_thread = java_lang_Thread::thread(thread_oop); | |
140 if (java_thread == NULL) { | |
141 return JVMTI_ERROR_THREAD_NOT_ALIVE; | |
142 } | |
143 JvmtiThreadState* state = java_thread->jvmti_thread_state(); | |
144 *data_ptr = (state == NULL) ? NULL : | |
145 state->env_thread_state(this)->get_agent_thread_local_storage_data(); | |
146 } | |
147 return JVMTI_ERROR_NONE; | |
148 } /* end GetThreadLocalStorage */ | |
149 | |
150 // | |
151 // Class functions | |
152 // | |
153 | |
154 // class_count_ptr - pre-checked for NULL | |
155 // classes_ptr - pre-checked for NULL | |
156 jvmtiError | |
157 JvmtiEnv::GetLoadedClasses(jint* class_count_ptr, jclass** classes_ptr) { | |
158 return JvmtiGetLoadedClasses::getLoadedClasses(this, class_count_ptr, classes_ptr); | |
159 } /* end GetLoadedClasses */ | |
160 | |
161 | |
162 // initiating_loader - NULL is a valid value, must be checked | |
163 // class_count_ptr - pre-checked for NULL | |
164 // classes_ptr - pre-checked for NULL | |
165 jvmtiError | |
166 JvmtiEnv::GetClassLoaderClasses(jobject initiating_loader, jint* class_count_ptr, jclass** classes_ptr) { | |
167 return JvmtiGetLoadedClasses::getClassLoaderClasses(this, initiating_loader, | |
168 class_count_ptr, classes_ptr); | |
169 } /* end GetClassLoaderClasses */ | |
170 | |
171 // k_mirror - may be primitive, this must be checked | |
172 // is_modifiable_class_ptr - pre-checked for NULL | |
173 jvmtiError | |
174 JvmtiEnv::IsModifiableClass(oop k_mirror, jboolean* is_modifiable_class_ptr) { | |
175 *is_modifiable_class_ptr = VM_RedefineClasses::is_modifiable_class(k_mirror)? | |
176 JNI_TRUE : JNI_FALSE; | |
177 return JVMTI_ERROR_NONE; | |
178 } /* end IsModifiableClass */ | |
179 | |
180 // class_count - pre-checked to be greater than or equal to 0 | |
181 // classes - pre-checked for NULL | |
182 jvmtiError | |
183 JvmtiEnv::RetransformClasses(jint class_count, const jclass* classes) { | |
184 //TODO: add locking | |
185 | |
186 int index; | |
187 JavaThread* current_thread = JavaThread::current(); | |
188 ResourceMark rm(current_thread); | |
189 | |
190 jvmtiClassDefinition* class_definitions = | |
191 NEW_RESOURCE_ARRAY(jvmtiClassDefinition, class_count); | |
192 NULL_CHECK(class_definitions, JVMTI_ERROR_OUT_OF_MEMORY); | |
193 | |
194 for (index = 0; index < class_count; index++) { | |
195 HandleMark hm(current_thread); | |
196 | |
197 jclass jcls = classes[index]; | |
198 oop k_mirror = JNIHandles::resolve_external_guard(jcls); | |
199 if (k_mirror == NULL) { | |
200 return JVMTI_ERROR_INVALID_CLASS; | |
201 } | |
202 if (!k_mirror->is_a(SystemDictionary::class_klass())) { | |
203 return JVMTI_ERROR_INVALID_CLASS; | |
204 } | |
205 | |
206 if (java_lang_Class::is_primitive(k_mirror)) { | |
207 return JVMTI_ERROR_UNMODIFIABLE_CLASS; | |
208 } | |
209 | |
210 klassOop k_oop = java_lang_Class::as_klassOop(k_mirror); | |
211 KlassHandle klass(current_thread, k_oop); | |
212 | |
213 jint status = klass->jvmti_class_status(); | |
214 if (status & (JVMTI_CLASS_STATUS_ERROR)) { | |
215 return JVMTI_ERROR_INVALID_CLASS; | |
216 } | |
217 if (status & (JVMTI_CLASS_STATUS_ARRAY)) { | |
218 return JVMTI_ERROR_UNMODIFIABLE_CLASS; | |
219 } | |
220 | |
221 instanceKlassHandle ikh(current_thread, k_oop); | |
222 if (ikh->get_cached_class_file_bytes() == NULL) { | |
223 // not cached, we need to reconstitute the class file from VM representation | |
224 constantPoolHandle constants(current_thread, ikh->constants()); | |
225 ObjectLocker ol(constants, current_thread); // lock constant pool while we query it | |
226 | |
227 JvmtiClassFileReconstituter reconstituter(ikh); | |
228 if (reconstituter.get_error() != JVMTI_ERROR_NONE) { | |
229 return reconstituter.get_error(); | |
230 } | |
231 | |
232 class_definitions[index].class_byte_count = (jint)reconstituter.class_file_size(); | |
233 class_definitions[index].class_bytes = (unsigned char*) | |
234 reconstituter.class_file_bytes(); | |
235 } else { | |
236 // it is cached, get it from the cache | |
237 class_definitions[index].class_byte_count = ikh->get_cached_class_file_len(); | |
238 class_definitions[index].class_bytes = ikh->get_cached_class_file_bytes(); | |
239 } | |
240 class_definitions[index].klass = jcls; | |
241 } | |
242 VM_RedefineClasses op(class_count, class_definitions, jvmti_class_load_kind_retransform); | |
243 VMThread::execute(&op); | |
244 return (op.check_error()); | |
245 } /* end RetransformClasses */ | |
246 | |
247 | |
248 // class_count - pre-checked to be greater than or equal to 0 | |
249 // class_definitions - pre-checked for NULL | |
250 jvmtiError | |
251 JvmtiEnv::RedefineClasses(jint class_count, const jvmtiClassDefinition* class_definitions) { | |
252 //TODO: add locking | |
253 VM_RedefineClasses op(class_count, class_definitions, jvmti_class_load_kind_redefine); | |
254 VMThread::execute(&op); | |
255 return (op.check_error()); | |
256 } /* end RedefineClasses */ | |
257 | |
258 | |
259 // | |
260 // Object functions | |
261 // | |
262 | |
263 // size_ptr - pre-checked for NULL | |
264 jvmtiError | |
265 JvmtiEnv::GetObjectSize(jobject object, jlong* size_ptr) { | |
266 oop mirror = JNIHandles::resolve_external_guard(object); | |
267 NULL_CHECK(mirror, JVMTI_ERROR_INVALID_OBJECT); | |
268 | |
269 if (mirror->klass() == SystemDictionary::class_klass()) { | |
270 if (!java_lang_Class::is_primitive(mirror)) { | |
271 mirror = java_lang_Class::as_klassOop(mirror); | |
272 assert(mirror != NULL, "class for non-primitive mirror must exist"); | |
273 } | |
274 } | |
275 | |
276 *size_ptr = mirror->size() * wordSize; | |
277 return JVMTI_ERROR_NONE; | |
278 } /* end GetObjectSize */ | |
279 | |
280 // | |
281 // Method functions | |
282 // | |
283 | |
284 // prefix - NULL is a valid value, must be checked | |
285 jvmtiError | |
286 JvmtiEnv::SetNativeMethodPrefix(const char* prefix) { | |
287 return prefix == NULL? | |
288 SetNativeMethodPrefixes(0, NULL) : | |
289 SetNativeMethodPrefixes(1, (char**)&prefix); | |
290 } /* end SetNativeMethodPrefix */ | |
291 | |
292 | |
293 // prefix_count - pre-checked to be greater than or equal to 0 | |
294 // prefixes - pre-checked for NULL | |
295 jvmtiError | |
296 JvmtiEnv::SetNativeMethodPrefixes(jint prefix_count, char** prefixes) { | |
297 // Have to grab JVMTI thread state lock to be sure that some thread | |
298 // isn't accessing the prefixes at the same time we are setting them. | |
299 // No locks during VM bring-up. | |
300 if (Threads::number_of_threads() == 0) { | |
301 return set_native_method_prefixes(prefix_count, prefixes); | |
302 } else { | |
303 MutexLocker mu(JvmtiThreadState_lock); | |
304 return set_native_method_prefixes(prefix_count, prefixes); | |
305 } | |
306 } /* end SetNativeMethodPrefixes */ | |
307 | |
308 // | |
309 // Event Management functions | |
310 // | |
311 | |
312 // callbacks - NULL is a valid value, must be checked | |
313 // size_of_callbacks - pre-checked to be greater than or equal to 0 | |
314 jvmtiError | |
315 JvmtiEnv::SetEventCallbacks(const jvmtiEventCallbacks* callbacks, jint size_of_callbacks) { | |
316 JvmtiEventController::set_event_callbacks(this, callbacks, size_of_callbacks); | |
317 return JVMTI_ERROR_NONE; | |
318 } /* end SetEventCallbacks */ | |
319 | |
320 | |
321 // event_thread - NULL is a valid value, must be checked | |
322 jvmtiError | |
323 JvmtiEnv::SetEventNotificationMode(jvmtiEventMode mode, jvmtiEvent event_type, jthread event_thread, ...) { | |
324 JavaThread* java_thread = NULL; | |
325 if (event_thread != NULL) { | |
326 oop thread_oop = JNIHandles::resolve_external_guard(event_thread); | |
327 if (thread_oop == NULL) { | |
328 return JVMTI_ERROR_INVALID_THREAD; | |
329 } | |
330 if (!thread_oop->is_a(SystemDictionary::thread_klass())) { | |
331 return JVMTI_ERROR_INVALID_THREAD; | |
332 } | |
333 java_thread = java_lang_Thread::thread(thread_oop); | |
334 if (java_thread == NULL) { | |
335 return JVMTI_ERROR_THREAD_NOT_ALIVE; | |
336 } | |
337 } | |
338 | |
339 // event_type must be valid | |
340 if (!JvmtiEventController::is_valid_event_type(event_type)) { | |
341 return JVMTI_ERROR_INVALID_EVENT_TYPE; | |
342 } | |
343 | |
344 // global events cannot be controlled at thread level. | |
345 if (java_thread != NULL && JvmtiEventController::is_global_event(event_type)) { | |
346 return JVMTI_ERROR_ILLEGAL_ARGUMENT; | |
347 } | |
348 | |
349 bool enabled = (mode == JVMTI_ENABLE); | |
350 | |
351 // assure that needed capabilities are present | |
352 if (enabled && !JvmtiUtil::has_event_capability(event_type, get_capabilities())) { | |
353 return JVMTI_ERROR_MUST_POSSESS_CAPABILITY; | |
354 } | |
355 | |
356 if (event_type == JVMTI_EVENT_CLASS_FILE_LOAD_HOOK && enabled) { | |
357 record_class_file_load_hook_enabled(); | |
358 } | |
359 JvmtiEventController::set_user_enabled(this, java_thread, event_type, enabled); | |
360 | |
361 return JVMTI_ERROR_NONE; | |
362 } /* end SetEventNotificationMode */ | |
363 | |
364 // | |
365 // Capability functions | |
366 // | |
367 | |
368 // capabilities_ptr - pre-checked for NULL | |
369 jvmtiError | |
370 JvmtiEnv::GetPotentialCapabilities(jvmtiCapabilities* capabilities_ptr) { | |
371 JvmtiManageCapabilities::get_potential_capabilities(get_capabilities(), | |
372 get_prohibited_capabilities(), | |
373 capabilities_ptr); | |
374 return JVMTI_ERROR_NONE; | |
375 } /* end GetPotentialCapabilities */ | |
376 | |
377 | |
378 // capabilities_ptr - pre-checked for NULL | |
379 jvmtiError | |
380 JvmtiEnv::AddCapabilities(const jvmtiCapabilities* capabilities_ptr) { | |
381 return JvmtiManageCapabilities::add_capabilities(get_capabilities(), | |
382 get_prohibited_capabilities(), | |
383 capabilities_ptr, | |
384 get_capabilities()); | |
385 } /* end AddCapabilities */ | |
386 | |
387 | |
388 // capabilities_ptr - pre-checked for NULL | |
389 jvmtiError | |
390 JvmtiEnv::RelinquishCapabilities(const jvmtiCapabilities* capabilities_ptr) { | |
391 JvmtiManageCapabilities::relinquish_capabilities(get_capabilities(), capabilities_ptr, get_capabilities()); | |
392 return JVMTI_ERROR_NONE; | |
393 } /* end RelinquishCapabilities */ | |
394 | |
395 | |
396 // capabilities_ptr - pre-checked for NULL | |
397 jvmtiError | |
398 JvmtiEnv::GetCapabilities(jvmtiCapabilities* capabilities_ptr) { | |
399 JvmtiManageCapabilities::copy_capabilities(get_capabilities(), capabilities_ptr); | |
400 return JVMTI_ERROR_NONE; | |
401 } /* end GetCapabilities */ | |
402 | |
403 // | |
404 // Class Loader Search functions | |
405 // | |
406 | |
407 // segment - pre-checked for NULL | |
408 jvmtiError | |
409 JvmtiEnv::AddToBootstrapClassLoaderSearch(const char* segment) { | |
410 jvmtiPhase phase = get_phase(); | |
411 if (phase == JVMTI_PHASE_ONLOAD) { | |
412 Arguments::append_sysclasspath(segment); | |
413 return JVMTI_ERROR_NONE; | |
414 } else { | |
415 assert(phase == JVMTI_PHASE_LIVE, "sanity check"); | |
416 | |
417 // create the zip entry | |
418 ClassPathZipEntry* zip_entry = ClassLoader::create_class_path_zip_entry(segment); | |
419 if (zip_entry == NULL) { | |
420 return JVMTI_ERROR_ILLEGAL_ARGUMENT; | |
421 } | |
422 | |
423 // lock the loader | |
424 Thread* thread = Thread::current(); | |
425 HandleMark hm; | |
426 Handle loader_lock = Handle(thread, SystemDictionary::system_loader_lock()); | |
427 | |
428 ObjectLocker ol(loader_lock, thread); | |
429 | |
430 // add the jar file to the bootclasspath | |
431 if (TraceClassLoading) { | |
432 tty->print_cr("[Opened %s]", zip_entry->name()); | |
433 } | |
434 ClassLoader::add_to_list(zip_entry); | |
435 return JVMTI_ERROR_NONE; | |
436 } | |
437 | |
438 } /* end AddToBootstrapClassLoaderSearch */ | |
439 | |
440 | |
441 // segment - pre-checked for NULL | |
442 jvmtiError | |
443 JvmtiEnv::AddToSystemClassLoaderSearch(const char* segment) { | |
444 jvmtiPhase phase = get_phase(); | |
445 | |
446 if (phase == JVMTI_PHASE_ONLOAD) { | |
447 for (SystemProperty* p = Arguments::system_properties(); p != NULL; p = p->next()) { | |
448 if (strcmp("java.class.path", p->key()) == 0) { | |
449 p->append_value(segment); | |
450 break; | |
451 } | |
452 } | |
453 return JVMTI_ERROR_NONE; | |
454 } else { | |
455 HandleMark hm; | |
456 | |
457 assert(phase == JVMTI_PHASE_LIVE, "sanity check"); | |
458 | |
459 // create the zip entry (which will open the zip file and hence | |
460 // check that the segment is indeed a zip file). | |
461 ClassPathZipEntry* zip_entry = ClassLoader::create_class_path_zip_entry(segment); | |
462 if (zip_entry == NULL) { | |
463 return JVMTI_ERROR_ILLEGAL_ARGUMENT; | |
464 } | |
465 delete zip_entry; // no longer needed | |
466 | |
467 // lock the loader | |
468 Thread* THREAD = Thread::current(); | |
469 Handle loader = Handle(THREAD, SystemDictionary::java_system_loader()); | |
470 | |
471 ObjectLocker ol(loader, THREAD); | |
472 | |
473 // need the path as java.lang.String | |
474 Handle path = java_lang_String::create_from_str(segment, THREAD); | |
475 if (HAS_PENDING_EXCEPTION) { | |
476 CLEAR_PENDING_EXCEPTION; | |
477 return JVMTI_ERROR_INTERNAL; | |
478 } | |
479 | |
480 instanceKlassHandle loader_ik(THREAD, loader->klass()); | |
481 | |
482 // Invoke the appendToClassPathForInstrumentation method - if the method | |
483 // is not found it means the loader doesn't support adding to the class path | |
484 // in the live phase. | |
485 { | |
486 JavaValue res(T_VOID); | |
487 JavaCalls::call_special(&res, | |
488 loader, | |
489 loader_ik, | |
490 vmSymbolHandles::appendToClassPathForInstrumentation_name(), | |
491 vmSymbolHandles::appendToClassPathForInstrumentation_signature(), | |
492 path, | |
493 THREAD); | |
494 if (HAS_PENDING_EXCEPTION) { | |
495 symbolOop ex_name = PENDING_EXCEPTION->klass()->klass_part()->name(); | |
496 CLEAR_PENDING_EXCEPTION; | |
497 | |
498 if (ex_name == vmSymbols::java_lang_NoSuchMethodError()) { | |
499 return JVMTI_ERROR_CLASS_LOADER_UNSUPPORTED; | |
500 } else { | |
501 return JVMTI_ERROR_INTERNAL; | |
502 } | |
503 } | |
504 } | |
505 | |
506 return JVMTI_ERROR_NONE; | |
507 } | |
508 } /* end AddToSystemClassLoaderSearch */ | |
509 | |
510 // | |
511 // General functions | |
512 // | |
513 | |
514 // phase_ptr - pre-checked for NULL | |
515 jvmtiError | |
516 JvmtiEnv::GetPhase(jvmtiPhase* phase_ptr) { | |
517 *phase_ptr = get_phase(); | |
518 return JVMTI_ERROR_NONE; | |
519 } /* end GetPhase */ | |
520 | |
521 | |
522 jvmtiError | |
523 JvmtiEnv::DisposeEnvironment() { | |
524 dispose(); | |
525 return JVMTI_ERROR_NONE; | |
526 } /* end DisposeEnvironment */ | |
527 | |
528 | |
529 // data - NULL is a valid value, must be checked | |
530 jvmtiError | |
531 JvmtiEnv::SetEnvironmentLocalStorage(const void* data) { | |
532 set_env_local_storage(data); | |
533 return JVMTI_ERROR_NONE; | |
534 } /* end SetEnvironmentLocalStorage */ | |
535 | |
536 | |
537 // data_ptr - pre-checked for NULL | |
538 jvmtiError | |
539 JvmtiEnv::GetEnvironmentLocalStorage(void** data_ptr) { | |
540 *data_ptr = (void*)get_env_local_storage(); | |
541 return JVMTI_ERROR_NONE; | |
542 } /* end GetEnvironmentLocalStorage */ | |
543 | |
544 // version_ptr - pre-checked for NULL | |
545 jvmtiError | |
546 JvmtiEnv::GetVersionNumber(jint* version_ptr) { | |
547 *version_ptr = JVMTI_VERSION; | |
548 return JVMTI_ERROR_NONE; | |
549 } /* end GetVersionNumber */ | |
550 | |
551 | |
552 // name_ptr - pre-checked for NULL | |
553 jvmtiError | |
554 JvmtiEnv::GetErrorName(jvmtiError error, char** name_ptr) { | |
555 if (error < JVMTI_ERROR_NONE || error > JVMTI_ERROR_MAX) { | |
556 return JVMTI_ERROR_ILLEGAL_ARGUMENT; | |
557 } | |
558 const char *name = JvmtiUtil::error_name(error); | |
559 if (name == NULL) { | |
560 return JVMTI_ERROR_ILLEGAL_ARGUMENT; | |
561 } | |
562 size_t len = strlen(name) + 1; | |
563 jvmtiError err = allocate(len, (unsigned char**)name_ptr); | |
564 if (err == JVMTI_ERROR_NONE) { | |
565 memcpy(*name_ptr, name, len); | |
566 } | |
567 return err; | |
568 } /* end GetErrorName */ | |
569 | |
570 | |
571 jvmtiError | |
572 JvmtiEnv::SetVerboseFlag(jvmtiVerboseFlag flag, jboolean value) { | |
573 switch (flag) { | |
574 case JVMTI_VERBOSE_OTHER: | |
575 // ignore | |
576 break; | |
577 case JVMTI_VERBOSE_CLASS: | |
578 TraceClassLoading = value != 0; | |
579 TraceClassUnloading = value != 0; | |
580 break; | |
581 case JVMTI_VERBOSE_GC: | |
582 PrintGC = value != 0; | |
583 TraceClassUnloading = value != 0; | |
584 break; | |
585 case JVMTI_VERBOSE_JNI: | |
586 PrintJNIResolving = value != 0; | |
587 break; | |
588 default: | |
589 return JVMTI_ERROR_ILLEGAL_ARGUMENT; | |
590 }; | |
591 return JVMTI_ERROR_NONE; | |
592 } /* end SetVerboseFlag */ | |
593 | |
594 | |
595 // format_ptr - pre-checked for NULL | |
596 jvmtiError | |
597 JvmtiEnv::GetJLocationFormat(jvmtiJlocationFormat* format_ptr) { | |
598 *format_ptr = JVMTI_JLOCATION_JVMBCI; | |
599 return JVMTI_ERROR_NONE; | |
600 } /* end GetJLocationFormat */ | |
601 | |
602 #ifndef JVMTI_KERNEL | |
603 | |
604 // | |
605 // Thread functions | |
606 // | |
607 | |
608 // Threads_lock NOT held | |
609 // thread - NOT pre-checked | |
610 // thread_state_ptr - pre-checked for NULL | |
611 jvmtiError | |
612 JvmtiEnv::GetThreadState(jthread thread, jint* thread_state_ptr) { | |
613 jint state; | |
614 oop thread_oop; | |
615 JavaThread* thr; | |
616 | |
617 if (thread == NULL) { | |
618 thread_oop = JavaThread::current()->threadObj(); | |
619 } else { | |
620 thread_oop = JNIHandles::resolve_external_guard(thread); | |
621 } | |
622 | |
623 if (thread_oop == NULL || !thread_oop->is_a(SystemDictionary::thread_klass())) { | |
624 return JVMTI_ERROR_INVALID_THREAD; | |
625 } | |
626 | |
627 // get most state bits | |
628 state = (jint)java_lang_Thread::get_thread_status(thread_oop); | |
629 | |
630 // add more state bits | |
631 thr = java_lang_Thread::thread(thread_oop); | |
632 if (thr != NULL) { | |
633 JavaThreadState jts = thr->thread_state(); | |
634 | |
635 if (thr->is_being_ext_suspended()) { | |
636 state |= JVMTI_THREAD_STATE_SUSPENDED; | |
637 } | |
638 if (jts == _thread_in_native) { | |
639 state |= JVMTI_THREAD_STATE_IN_NATIVE; | |
640 } | |
641 OSThread* osThread = thr->osthread(); | |
642 if (osThread != NULL && osThread->interrupted()) { | |
643 state |= JVMTI_THREAD_STATE_INTERRUPTED; | |
644 } | |
645 } | |
646 | |
647 *thread_state_ptr = state; | |
648 return JVMTI_ERROR_NONE; | |
649 } /* end GetThreadState */ | |
650 | |
651 | |
652 // thread_ptr - pre-checked for NULL | |
653 jvmtiError | |
654 JvmtiEnv::GetCurrentThread(jthread* thread_ptr) { | |
655 JavaThread* current_thread = JavaThread::current(); | |
656 *thread_ptr = (jthread)JNIHandles::make_local(current_thread, current_thread->threadObj()); | |
657 return JVMTI_ERROR_NONE; | |
658 } /* end GetCurrentThread */ | |
659 | |
660 | |
661 // threads_count_ptr - pre-checked for NULL | |
662 // threads_ptr - pre-checked for NULL | |
663 jvmtiError | |
664 JvmtiEnv::GetAllThreads(jint* threads_count_ptr, jthread** threads_ptr) { | |
665 int nthreads = 0; | |
666 Handle *thread_objs = NULL; | |
667 ResourceMark rm; | |
668 HandleMark hm; | |
669 | |
670 // enumerate threads (including agent threads) | |
671 ThreadsListEnumerator tle(Thread::current(), true); | |
672 nthreads = tle.num_threads(); | |
673 *threads_count_ptr = nthreads; | |
674 | |
675 if (nthreads == 0) { | |
676 *threads_ptr = NULL; | |
677 return JVMTI_ERROR_NONE; | |
678 } | |
679 | |
680 thread_objs = NEW_RESOURCE_ARRAY(Handle, nthreads); | |
681 NULL_CHECK(thread_objs, JVMTI_ERROR_OUT_OF_MEMORY); | |
682 | |
683 for (int i=0; i < nthreads; i++) { | |
684 thread_objs[i] = Handle(tle.get_threadObj(i)); | |
685 } | |
686 | |
687 // have to make global handles outside of Threads_lock | |
688 jthread *jthreads = new_jthreadArray(nthreads, thread_objs); | |
689 NULL_CHECK(jthreads, JVMTI_ERROR_OUT_OF_MEMORY); | |
690 | |
691 *threads_ptr = jthreads; | |
692 return JVMTI_ERROR_NONE; | |
693 } /* end GetAllThreads */ | |
694 | |
695 | |
696 // Threads_lock NOT held, java_thread not protected by lock | |
697 // java_thread - pre-checked | |
698 jvmtiError | |
699 JvmtiEnv::SuspendThread(JavaThread* java_thread) { | |
700 // don't allow hidden thread suspend request. | |
701 if (java_thread->is_hidden_from_external_view()) { | |
702 return (JVMTI_ERROR_NONE); | |
703 } | |
704 | |
705 { | |
706 MutexLockerEx ml(java_thread->SR_lock(), Mutex::_no_safepoint_check_flag); | |
707 if (java_thread->is_external_suspend()) { | |
708 // don't allow nested external suspend requests. | |
709 return (JVMTI_ERROR_THREAD_SUSPENDED); | |
710 } | |
711 if (java_thread->is_exiting()) { // thread is in the process of exiting | |
712 return (JVMTI_ERROR_THREAD_NOT_ALIVE); | |
713 } | |
714 java_thread->set_external_suspend(); | |
715 } | |
716 | |
717 if (!JvmtiSuspendControl::suspend(java_thread)) { | |
718 // the thread was in the process of exiting | |
719 return (JVMTI_ERROR_THREAD_NOT_ALIVE); | |
720 } | |
721 return JVMTI_ERROR_NONE; | |
722 } /* end SuspendThread */ | |
723 | |
724 | |
725 // request_count - pre-checked to be greater than or equal to 0 | |
726 // request_list - pre-checked for NULL | |
727 // results - pre-checked for NULL | |
728 jvmtiError | |
729 JvmtiEnv::SuspendThreadList(jint request_count, const jthread* request_list, jvmtiError* results) { | |
730 int needSafepoint = 0; // > 0 if we need a safepoint | |
731 for (int i = 0; i < request_count; i++) { | |
732 JavaThread *java_thread = get_JavaThread(request_list[i]); | |
733 if (java_thread == NULL) { | |
734 results[i] = JVMTI_ERROR_INVALID_THREAD; | |
735 continue; | |
736 } | |
737 // the thread has not yet run or has exited (not on threads list) | |
738 if (java_thread->threadObj() == NULL) { | |
739 results[i] = JVMTI_ERROR_THREAD_NOT_ALIVE; | |
740 continue; | |
741 } | |
742 if (java_lang_Thread::thread(java_thread->threadObj()) == NULL) { | |
743 results[i] = JVMTI_ERROR_THREAD_NOT_ALIVE; | |
744 continue; | |
745 } | |
746 // don't allow hidden thread suspend request. | |
747 if (java_thread->is_hidden_from_external_view()) { | |
748 results[i] = JVMTI_ERROR_NONE; // indicate successful suspend | |
749 continue; | |
750 } | |
751 | |
752 { | |
753 MutexLockerEx ml(java_thread->SR_lock(), Mutex::_no_safepoint_check_flag); | |
754 if (java_thread->is_external_suspend()) { | |
755 // don't allow nested external suspend requests. | |
756 results[i] = JVMTI_ERROR_THREAD_SUSPENDED; | |
757 continue; | |
758 } | |
759 if (java_thread->is_exiting()) { // thread is in the process of exiting | |
760 results[i] = JVMTI_ERROR_THREAD_NOT_ALIVE; | |
761 continue; | |
762 } | |
763 java_thread->set_external_suspend(); | |
764 } | |
765 if (java_thread->thread_state() == _thread_in_native) { | |
766 // We need to try and suspend native threads here. Threads in | |
767 // other states will self-suspend on their next transition. | |
768 if (!JvmtiSuspendControl::suspend(java_thread)) { | |
769 // The thread was in the process of exiting. Force another | |
770 // safepoint to make sure that this thread transitions. | |
771 needSafepoint++; | |
772 results[i] = JVMTI_ERROR_THREAD_NOT_ALIVE; | |
773 continue; | |
774 } | |
775 } else { | |
776 needSafepoint++; | |
777 } | |
778 results[i] = JVMTI_ERROR_NONE; // indicate successful suspend | |
779 } | |
780 if (needSafepoint > 0) { | |
781 VM_ForceSafepoint vfs; | |
782 VMThread::execute(&vfs); | |
783 } | |
784 // per-thread suspend results returned via results parameter | |
785 return JVMTI_ERROR_NONE; | |
786 } /* end SuspendThreadList */ | |
787 | |
788 | |
789 // Threads_lock NOT held, java_thread not protected by lock | |
790 // java_thread - pre-checked | |
791 jvmtiError | |
792 JvmtiEnv::ResumeThread(JavaThread* java_thread) { | |
793 // don't allow hidden thread resume request. | |
794 if (java_thread->is_hidden_from_external_view()) { | |
795 return JVMTI_ERROR_NONE; | |
796 } | |
797 | |
798 if (!java_thread->is_being_ext_suspended()) { | |
799 return JVMTI_ERROR_THREAD_NOT_SUSPENDED; | |
800 } | |
801 | |
802 if (!JvmtiSuspendControl::resume(java_thread)) { | |
803 return JVMTI_ERROR_INTERNAL; | |
804 } | |
805 return JVMTI_ERROR_NONE; | |
806 } /* end ResumeThread */ | |
807 | |
808 | |
809 // request_count - pre-checked to be greater than or equal to 0 | |
810 // request_list - pre-checked for NULL | |
811 // results - pre-checked for NULL | |
812 jvmtiError | |
813 JvmtiEnv::ResumeThreadList(jint request_count, const jthread* request_list, jvmtiError* results) { | |
814 for (int i = 0; i < request_count; i++) { | |
815 JavaThread *java_thread = get_JavaThread(request_list[i]); | |
816 if (java_thread == NULL) { | |
817 results[i] = JVMTI_ERROR_INVALID_THREAD; | |
818 continue; | |
819 } | |
820 // don't allow hidden thread resume request. | |
821 if (java_thread->is_hidden_from_external_view()) { | |
822 results[i] = JVMTI_ERROR_NONE; // indicate successful resume | |
823 continue; | |
824 } | |
825 if (!java_thread->is_being_ext_suspended()) { | |
826 results[i] = JVMTI_ERROR_THREAD_NOT_SUSPENDED; | |
827 continue; | |
828 } | |
829 | |
830 if (!JvmtiSuspendControl::resume(java_thread)) { | |
831 results[i] = JVMTI_ERROR_INTERNAL; | |
832 continue; | |
833 } | |
834 | |
835 results[i] = JVMTI_ERROR_NONE; // indicate successful suspend | |
836 } | |
837 // per-thread resume results returned via results parameter | |
838 return JVMTI_ERROR_NONE; | |
839 } /* end ResumeThreadList */ | |
840 | |
841 | |
842 // Threads_lock NOT held, java_thread not protected by lock | |
843 // java_thread - pre-checked | |
844 jvmtiError | |
845 JvmtiEnv::StopThread(JavaThread* java_thread, jobject exception) { | |
846 oop e = JNIHandles::resolve_external_guard(exception); | |
847 NULL_CHECK(e, JVMTI_ERROR_NULL_POINTER); | |
848 | |
849 JavaThread::send_async_exception(java_thread->threadObj(), e); | |
850 | |
851 return JVMTI_ERROR_NONE; | |
852 | |
853 } /* end StopThread */ | |
854 | |
855 | |
856 // Threads_lock NOT held | |
857 // thread - NOT pre-checked | |
858 jvmtiError | |
859 JvmtiEnv::InterruptThread(jthread thread) { | |
860 oop thread_oop = JNIHandles::resolve_external_guard(thread); | |
861 if (thread_oop == NULL || !thread_oop->is_a(SystemDictionary::thread_klass())) | |
862 return JVMTI_ERROR_INVALID_THREAD; | |
863 | |
864 JavaThread* current_thread = JavaThread::current(); | |
865 | |
866 // Todo: this is a duplicate of JVM_Interrupt; share code in future | |
867 // Ensure that the C++ Thread and OSThread structures aren't freed before we operate | |
868 MutexLockerEx ml(current_thread->threadObj() == thread_oop ? NULL : Threads_lock); | |
869 // We need to re-resolve the java_thread, since a GC might have happened during the | |
870 // acquire of the lock | |
871 | |
872 JavaThread* java_thread = java_lang_Thread::thread(JNIHandles::resolve_external_guard(thread)); | |
873 NULL_CHECK(java_thread, JVMTI_ERROR_THREAD_NOT_ALIVE); | |
874 | |
875 Thread::interrupt(java_thread); | |
876 | |
877 return JVMTI_ERROR_NONE; | |
878 } /* end InterruptThread */ | |
879 | |
880 | |
881 // Threads_lock NOT held | |
882 // thread - NOT pre-checked | |
883 // info_ptr - pre-checked for NULL | |
884 jvmtiError | |
885 JvmtiEnv::GetThreadInfo(jthread thread, jvmtiThreadInfo* info_ptr) { | |
886 ResourceMark rm; | |
887 HandleMark hm; | |
888 | |
889 JavaThread* current_thread = JavaThread::current(); | |
890 | |
891 // if thread is NULL the current thread is used | |
892 oop thread_oop; | |
893 if (thread == NULL) { | |
894 thread_oop = current_thread->threadObj(); | |
895 } else { | |
896 thread_oop = JNIHandles::resolve_external_guard(thread); | |
897 } | |
898 if (thread_oop == NULL || !thread_oop->is_a(SystemDictionary::thread_klass())) | |
899 return JVMTI_ERROR_INVALID_THREAD; | |
900 | |
901 Handle thread_obj(current_thread, thread_oop); | |
902 typeArrayHandle name; | |
903 ThreadPriority priority; | |
904 Handle thread_group; | |
905 Handle context_class_loader; | |
906 bool is_daemon; | |
907 | |
908 { MutexLocker mu(Threads_lock); | |
909 | |
910 name = typeArrayHandle(current_thread, java_lang_Thread::name(thread_obj())); | |
911 priority = java_lang_Thread::priority(thread_obj()); | |
912 thread_group = Handle(current_thread, java_lang_Thread::threadGroup(thread_obj())); | |
913 is_daemon = java_lang_Thread::is_daemon(thread_obj()); | |
914 | |
915 oop loader = java_lang_Thread::context_class_loader(thread_obj()); | |
916 context_class_loader = Handle(current_thread, loader); | |
917 } | |
918 { const char *n; | |
919 | |
920 if (name() != NULL) { | |
921 n = UNICODE::as_utf8((jchar*) name->base(T_CHAR), name->length()); | |
922 } else { | |
923 n = UNICODE::as_utf8(NULL, 0); | |
924 } | |
925 | |
926 info_ptr->name = (char *) jvmtiMalloc(strlen(n)+1); | |
927 if (info_ptr->name == NULL) | |
928 return JVMTI_ERROR_OUT_OF_MEMORY; | |
929 | |
930 strcpy(info_ptr->name, n); | |
931 } | |
932 info_ptr->is_daemon = is_daemon; | |
933 info_ptr->priority = priority; | |
934 | |
935 info_ptr->context_class_loader = (context_class_loader.is_null()) ? NULL : | |
936 jni_reference(context_class_loader); | |
937 info_ptr->thread_group = jni_reference(thread_group); | |
938 | |
939 return JVMTI_ERROR_NONE; | |
940 } /* end GetThreadInfo */ | |
941 | |
942 | |
943 // Threads_lock NOT held, java_thread not protected by lock | |
944 // java_thread - pre-checked | |
945 // owned_monitor_count_ptr - pre-checked for NULL | |
946 // owned_monitors_ptr - pre-checked for NULL | |
947 jvmtiError | |
948 JvmtiEnv::GetOwnedMonitorInfo(JavaThread* java_thread, jint* owned_monitor_count_ptr, jobject** owned_monitors_ptr) { | |
949 jvmtiError err = JVMTI_ERROR_NONE; | |
950 JavaThread* calling_thread = JavaThread::current(); | |
951 | |
952 // growable array of jvmti monitors info on the C-heap | |
953 GrowableArray<jvmtiMonitorStackDepthInfo*> *owned_monitors_list = | |
954 new (ResourceObj::C_HEAP) GrowableArray<jvmtiMonitorStackDepthInfo*>(1, true); | |
955 | |
956 uint32_t debug_bits = 0; | |
957 if (is_thread_fully_suspended(java_thread, true, &debug_bits)) { | |
958 err = get_owned_monitors(calling_thread, java_thread, owned_monitors_list); | |
959 } else { | |
960 // JVMTI get monitors info at safepoint. Do not require target thread to | |
961 // be suspended. | |
962 VM_GetOwnedMonitorInfo op(this, calling_thread, java_thread, owned_monitors_list); | |
963 VMThread::execute(&op); | |
964 err = op.result(); | |
965 } | |
966 jint owned_monitor_count = owned_monitors_list->length(); | |
967 if (err == JVMTI_ERROR_NONE) { | |
968 if ((err = allocate(owned_monitor_count * sizeof(jobject *), | |
969 (unsigned char**)owned_monitors_ptr)) == JVMTI_ERROR_NONE) { | |
970 // copy into the returned array | |
971 for (int i = 0; i < owned_monitor_count; i++) { | |
972 (*owned_monitors_ptr)[i] = | |
973 ((jvmtiMonitorStackDepthInfo*)owned_monitors_list->at(i))->monitor; | |
974 } | |
975 *owned_monitor_count_ptr = owned_monitor_count; | |
976 } | |
977 } | |
978 // clean up. | |
979 for (int i = 0; i < owned_monitor_count; i++) { | |
980 deallocate((unsigned char*)owned_monitors_list->at(i)); | |
981 } | |
982 delete owned_monitors_list; | |
983 | |
984 return err; | |
985 } /* end GetOwnedMonitorInfo */ | |
986 | |
987 | |
988 // Threads_lock NOT held, java_thread not protected by lock | |
989 // java_thread - pre-checked | |
990 // monitor_info_count_ptr - pre-checked for NULL | |
991 // monitor_info_ptr - pre-checked for NULL | |
992 jvmtiError | |
993 JvmtiEnv::GetOwnedMonitorStackDepthInfo(JavaThread* java_thread, jint* monitor_info_count_ptr, jvmtiMonitorStackDepthInfo** monitor_info_ptr) { | |
994 jvmtiError err = JVMTI_ERROR_NONE; | |
995 JavaThread* calling_thread = JavaThread::current(); | |
996 | |
997 // growable array of jvmti monitors info on the C-heap | |
998 GrowableArray<jvmtiMonitorStackDepthInfo*> *owned_monitors_list = | |
999 new (ResourceObj::C_HEAP) GrowableArray<jvmtiMonitorStackDepthInfo*>(1, true); | |
1000 | |
1001 uint32_t debug_bits = 0; | |
1002 if (is_thread_fully_suspended(java_thread, true, &debug_bits)) { | |
1003 err = get_owned_monitors(calling_thread, java_thread, owned_monitors_list); | |
1004 } else { | |
1005 // JVMTI get owned monitors info at safepoint. Do not require target thread to | |
1006 // be suspended. | |
1007 VM_GetOwnedMonitorInfo op(this, calling_thread, java_thread, owned_monitors_list); | |
1008 VMThread::execute(&op); | |
1009 err = op.result(); | |
1010 } | |
1011 | |
1012 jint owned_monitor_count = owned_monitors_list->length(); | |
1013 if (err == JVMTI_ERROR_NONE) { | |
1014 if ((err = allocate(owned_monitor_count * sizeof(jvmtiMonitorStackDepthInfo), | |
1015 (unsigned char**)monitor_info_ptr)) == JVMTI_ERROR_NONE) { | |
1016 // copy to output array. | |
1017 for (int i = 0; i < owned_monitor_count; i++) { | |
1018 (*monitor_info_ptr)[i].monitor = | |
1019 ((jvmtiMonitorStackDepthInfo*)owned_monitors_list->at(i))->monitor; | |
1020 (*monitor_info_ptr)[i].stack_depth = | |
1021 ((jvmtiMonitorStackDepthInfo*)owned_monitors_list->at(i))->stack_depth; | |
1022 } | |
1023 } | |
1024 *monitor_info_count_ptr = owned_monitor_count; | |
1025 } | |
1026 | |
1027 // clean up. | |
1028 for (int i = 0; i < owned_monitor_count; i++) { | |
1029 deallocate((unsigned char*)owned_monitors_list->at(i)); | |
1030 } | |
1031 delete owned_monitors_list; | |
1032 | |
1033 return err; | |
1034 } /* end GetOwnedMonitorStackDepthInfo */ | |
1035 | |
1036 | |
1037 // Threads_lock NOT held, java_thread not protected by lock | |
1038 // java_thread - pre-checked | |
1039 // monitor_ptr - pre-checked for NULL | |
1040 jvmtiError | |
1041 JvmtiEnv::GetCurrentContendedMonitor(JavaThread* java_thread, jobject* monitor_ptr) { | |
1042 jvmtiError err = JVMTI_ERROR_NONE; | |
1043 uint32_t debug_bits = 0; | |
1044 JavaThread* calling_thread = JavaThread::current(); | |
1045 if (is_thread_fully_suspended(java_thread, true, &debug_bits)) { | |
1046 err = get_current_contended_monitor(calling_thread, java_thread, monitor_ptr); | |
1047 } else { | |
1048 // get contended monitor information at safepoint. | |
1049 VM_GetCurrentContendedMonitor op(this, calling_thread, java_thread, monitor_ptr); | |
1050 VMThread::execute(&op); | |
1051 err = op.result(); | |
1052 } | |
1053 return err; | |
1054 } /* end GetCurrentContendedMonitor */ | |
1055 | |
1056 | |
1057 // Threads_lock NOT held | |
1058 // thread - NOT pre-checked | |
1059 // proc - pre-checked for NULL | |
1060 // arg - NULL is a valid value, must be checked | |
1061 jvmtiError | |
1062 JvmtiEnv::RunAgentThread(jthread thread, jvmtiStartFunction proc, const void* arg, jint priority) { | |
1063 oop thread_oop = JNIHandles::resolve_external_guard(thread); | |
1064 if (thread_oop == NULL || !thread_oop->is_a(SystemDictionary::thread_klass())) { | |
1065 return JVMTI_ERROR_INVALID_THREAD; | |
1066 } | |
1067 if (priority < JVMTI_THREAD_MIN_PRIORITY || priority > JVMTI_THREAD_MAX_PRIORITY) { | |
1068 return JVMTI_ERROR_INVALID_PRIORITY; | |
1069 } | |
1070 | |
1071 //Thread-self | |
1072 JavaThread* current_thread = JavaThread::current(); | |
1073 | |
1074 Handle thread_hndl(current_thread, thread_oop); | |
1075 { | |
1076 MutexLocker mu(Threads_lock); // grab Threads_lock | |
1077 | |
1078 JvmtiAgentThread *new_thread = new JvmtiAgentThread(this, proc, arg); | |
1079 | |
1080 // At this point it may be possible that no osthread was created for the | |
1081 // JavaThread due to lack of memory. | |
1082 if (new_thread == NULL || new_thread->osthread() == NULL) { | |
1083 if (new_thread) delete new_thread; | |
1084 return JVMTI_ERROR_OUT_OF_MEMORY; | |
1085 } | |
1086 | |
1087 java_lang_Thread::set_thread(thread_hndl(), new_thread); | |
1088 java_lang_Thread::set_priority(thread_hndl(), (ThreadPriority)priority); | |
1089 java_lang_Thread::set_daemon(thread_hndl()); | |
1090 | |
1091 new_thread->set_threadObj(thread_hndl()); | |
1092 Threads::add(new_thread); | |
1093 Thread::start(new_thread); | |
1094 } // unlock Threads_lock | |
1095 | |
1096 return JVMTI_ERROR_NONE; | |
1097 } /* end RunAgentThread */ | |
1098 | |
1099 // | |
1100 // Thread Group functions | |
1101 // | |
1102 | |
1103 // group_count_ptr - pre-checked for NULL | |
1104 // groups_ptr - pre-checked for NULL | |
1105 jvmtiError | |
1106 JvmtiEnv::GetTopThreadGroups(jint* group_count_ptr, jthreadGroup** groups_ptr) { | |
1107 JavaThread* current_thread = JavaThread::current(); | |
1108 | |
1109 // Only one top level thread group now. | |
1110 *group_count_ptr = 1; | |
1111 | |
1112 // Allocate memory to store global-refs to the thread groups. | |
1113 // Assume this area is freed by caller. | |
1114 *groups_ptr = (jthreadGroup *) jvmtiMalloc((sizeof(jthreadGroup)) * (*group_count_ptr)); | |
1115 | |
1116 NULL_CHECK(*groups_ptr, JVMTI_ERROR_OUT_OF_MEMORY); | |
1117 | |
1118 // Convert oop to Handle, then convert Handle to global-ref. | |
1119 { | |
1120 HandleMark hm(current_thread); | |
1121 Handle system_thread_group(current_thread, Universe::system_thread_group()); | |
1122 *groups_ptr[0] = jni_reference(system_thread_group); | |
1123 } | |
1124 | |
1125 return JVMTI_ERROR_NONE; | |
1126 } /* end GetTopThreadGroups */ | |
1127 | |
1128 | |
1129 // info_ptr - pre-checked for NULL | |
1130 jvmtiError | |
1131 JvmtiEnv::GetThreadGroupInfo(jthreadGroup group, jvmtiThreadGroupInfo* info_ptr) { | |
1132 ResourceMark rm; | |
1133 HandleMark hm; | |
1134 | |
1135 JavaThread* current_thread = JavaThread::current(); | |
1136 | |
1137 Handle group_obj (current_thread, JNIHandles::resolve_external_guard(group)); | |
1138 NULL_CHECK(group_obj(), JVMTI_ERROR_INVALID_THREAD_GROUP); | |
1139 | |
1140 typeArrayHandle name; | |
1141 Handle parent_group; | |
1142 bool is_daemon; | |
1143 ThreadPriority max_priority; | |
1144 | |
1145 { MutexLocker mu(Threads_lock); | |
1146 | |
1147 name = typeArrayHandle(current_thread, | |
1148 java_lang_ThreadGroup::name(group_obj())); | |
1149 parent_group = Handle(current_thread, java_lang_ThreadGroup::parent(group_obj())); | |
1150 is_daemon = java_lang_ThreadGroup::is_daemon(group_obj()); | |
1151 max_priority = java_lang_ThreadGroup::maxPriority(group_obj()); | |
1152 } | |
1153 | |
1154 info_ptr->is_daemon = is_daemon; | |
1155 info_ptr->max_priority = max_priority; | |
1156 info_ptr->parent = jni_reference(parent_group); | |
1157 | |
1158 if (name() != NULL) { | |
1159 const char* n = UNICODE::as_utf8((jchar*) name->base(T_CHAR), name->length()); | |
1160 info_ptr->name = (char *)jvmtiMalloc(strlen(n)+1); | |
1161 NULL_CHECK(info_ptr->name, JVMTI_ERROR_OUT_OF_MEMORY); | |
1162 strcpy(info_ptr->name, n); | |
1163 } else { | |
1164 info_ptr->name = NULL; | |
1165 } | |
1166 | |
1167 return JVMTI_ERROR_NONE; | |
1168 } /* end GetThreadGroupInfo */ | |
1169 | |
1170 | |
1171 // thread_count_ptr - pre-checked for NULL | |
1172 // threads_ptr - pre-checked for NULL | |
1173 // group_count_ptr - pre-checked for NULL | |
1174 // groups_ptr - pre-checked for NULL | |
1175 jvmtiError | |
1176 JvmtiEnv::GetThreadGroupChildren(jthreadGroup group, jint* thread_count_ptr, jthread** threads_ptr, jint* group_count_ptr, jthreadGroup** groups_ptr) { | |
1177 JavaThread* current_thread = JavaThread::current(); | |
1178 oop group_obj = (oop) JNIHandles::resolve_external_guard(group); | |
1179 NULL_CHECK(group_obj, JVMTI_ERROR_INVALID_THREAD_GROUP); | |
1180 | |
1181 Handle *thread_objs = NULL; | |
1182 Handle *group_objs = NULL; | |
1183 int nthreads = 0; | |
1184 int ngroups = 0; | |
1185 int hidden_threads = 0; | |
1186 | |
1187 ResourceMark rm; | |
1188 HandleMark hm; | |
1189 | |
1190 Handle group_hdl(current_thread, group_obj); | |
1191 | |
1192 { MutexLocker mu(Threads_lock); | |
1193 | |
1194 nthreads = java_lang_ThreadGroup::nthreads(group_hdl()); | |
1195 ngroups = java_lang_ThreadGroup::ngroups(group_hdl()); | |
1196 | |
1197 if (nthreads > 0) { | |
1198 objArrayOop threads = java_lang_ThreadGroup::threads(group_hdl()); | |
1199 assert(nthreads <= threads->length(), "too many threads"); | |
1200 thread_objs = NEW_RESOURCE_ARRAY(Handle,nthreads); | |
1201 for (int i=0, j=0; i<nthreads; i++) { | |
1202 oop thread_obj = threads->obj_at(i); | |
1203 assert(thread_obj != NULL, "thread_obj is NULL"); | |
1204 JavaThread *javathread = java_lang_Thread::thread(thread_obj); | |
1205 // Filter out hidden java threads. | |
1206 if (javathread != NULL && javathread->is_hidden_from_external_view()) { | |
1207 hidden_threads++; | |
1208 continue; | |
1209 } | |
1210 thread_objs[j++] = Handle(current_thread, thread_obj); | |
1211 } | |
1212 nthreads -= hidden_threads; | |
1213 } | |
1214 if (ngroups > 0) { | |
1215 objArrayOop groups = java_lang_ThreadGroup::groups(group_hdl()); | |
1216 assert(ngroups <= groups->length(), "too many threads"); | |
1217 group_objs = NEW_RESOURCE_ARRAY(Handle,ngroups); | |
1218 for (int i=0; i<ngroups; i++) { | |
1219 oop group_obj = groups->obj_at(i); | |
1220 assert(group_obj != NULL, "group_obj != NULL"); | |
1221 group_objs[i] = Handle(current_thread, group_obj); | |
1222 } | |
1223 } | |
1224 } | |
1225 | |
1226 // have to make global handles outside of Threads_lock | |
1227 *group_count_ptr = ngroups; | |
1228 *thread_count_ptr = nthreads; | |
1229 *threads_ptr = new_jthreadArray(nthreads, thread_objs); | |
1230 *groups_ptr = new_jthreadGroupArray(ngroups, group_objs); | |
1231 if ((nthreads > 0) && (*threads_ptr == NULL)) { | |
1232 return JVMTI_ERROR_OUT_OF_MEMORY; | |
1233 } | |
1234 if ((ngroups > 0) && (*groups_ptr == NULL)) { | |
1235 return JVMTI_ERROR_OUT_OF_MEMORY; | |
1236 } | |
1237 | |
1238 return JVMTI_ERROR_NONE; | |
1239 } /* end GetThreadGroupChildren */ | |
1240 | |
1241 | |
1242 // | |
1243 // Stack Frame functions | |
1244 // | |
1245 | |
1246 // Threads_lock NOT held, java_thread not protected by lock | |
1247 // java_thread - pre-checked | |
1248 // max_frame_count - pre-checked to be greater than or equal to 0 | |
1249 // frame_buffer - pre-checked for NULL | |
1250 // count_ptr - pre-checked for NULL | |
1251 jvmtiError | |
1252 JvmtiEnv::GetStackTrace(JavaThread* java_thread, jint start_depth, jint max_frame_count, jvmtiFrameInfo* frame_buffer, jint* count_ptr) { | |
1253 jvmtiError err = JVMTI_ERROR_NONE; | |
1254 uint32_t debug_bits = 0; | |
1255 if (is_thread_fully_suspended(java_thread, true, &debug_bits)) { | |
1256 err = get_stack_trace(java_thread, start_depth, max_frame_count, frame_buffer, count_ptr); | |
1257 } else { | |
1258 // JVMTI get stack trace at safepoint. Do not require target thread to | |
1259 // be suspended. | |
1260 VM_GetStackTrace op(this, java_thread, start_depth, max_frame_count, frame_buffer, count_ptr); | |
1261 VMThread::execute(&op); | |
1262 err = op.result(); | |
1263 } | |
1264 | |
1265 return err; | |
1266 } /* end GetStackTrace */ | |
1267 | |
1268 | |
1269 // max_frame_count - pre-checked to be greater than or equal to 0 | |
1270 // stack_info_ptr - pre-checked for NULL | |
1271 // thread_count_ptr - pre-checked for NULL | |
1272 jvmtiError | |
1273 JvmtiEnv::GetAllStackTraces(jint max_frame_count, jvmtiStackInfo** stack_info_ptr, jint* thread_count_ptr) { | |
1274 jvmtiError err = JVMTI_ERROR_NONE; | |
1275 JavaThread* calling_thread = JavaThread::current(); | |
1276 | |
1277 // JVMTI get stack traces at safepoint. | |
1278 VM_GetAllStackTraces op(this, calling_thread, max_frame_count); | |
1279 VMThread::execute(&op); | |
1280 *thread_count_ptr = op.final_thread_count(); | |
1281 *stack_info_ptr = op.stack_info(); | |
1282 err = op.result(); | |
1283 return err; | |
1284 } /* end GetAllStackTraces */ | |
1285 | |
1286 | |
1287 // thread_count - pre-checked to be greater than or equal to 0 | |
1288 // thread_list - pre-checked for NULL | |
1289 // max_frame_count - pre-checked to be greater than or equal to 0 | |
1290 // stack_info_ptr - pre-checked for NULL | |
1291 jvmtiError | |
1292 JvmtiEnv::GetThreadListStackTraces(jint thread_count, const jthread* thread_list, jint max_frame_count, jvmtiStackInfo** stack_info_ptr) { | |
1293 jvmtiError err = JVMTI_ERROR_NONE; | |
1294 // JVMTI get stack traces at safepoint. | |
1295 VM_GetThreadListStackTraces op(this, thread_count, thread_list, max_frame_count); | |
1296 VMThread::execute(&op); | |
1297 err = op.result(); | |
1298 if (err == JVMTI_ERROR_NONE) { | |
1299 *stack_info_ptr = op.stack_info(); | |
1300 } | |
1301 return err; | |
1302 } /* end GetThreadListStackTraces */ | |
1303 | |
1304 | |
1305 // Threads_lock NOT held, java_thread not protected by lock | |
1306 // java_thread - pre-checked | |
1307 // count_ptr - pre-checked for NULL | |
1308 jvmtiError | |
1309 JvmtiEnv::GetFrameCount(JavaThread* java_thread, jint* count_ptr) { | |
1310 jvmtiError err = JVMTI_ERROR_NONE; | |
1311 | |
1312 // retrieve or create JvmtiThreadState. | |
1313 JvmtiThreadState* state = JvmtiThreadState::state_for(java_thread); | |
609
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1314 if (state == NULL) { |
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1315 return JVMTI_ERROR_THREAD_NOT_ALIVE; |
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1316 } |
0 | 1317 uint32_t debug_bits = 0; |
1318 if (is_thread_fully_suspended(java_thread, true, &debug_bits)) { | |
1319 err = get_frame_count(state, count_ptr); | |
1320 } else { | |
1321 // get java stack frame count at safepoint. | |
1322 VM_GetFrameCount op(this, state, count_ptr); | |
1323 VMThread::execute(&op); | |
1324 err = op.result(); | |
1325 } | |
1326 return err; | |
1327 } /* end GetFrameCount */ | |
1328 | |
1329 | |
1330 // Threads_lock NOT held, java_thread not protected by lock | |
1331 // java_thread - pre-checked | |
1332 jvmtiError | |
1333 JvmtiEnv::PopFrame(JavaThread* java_thread) { | |
1334 JavaThread* current_thread = JavaThread::current(); | |
1335 HandleMark hm(current_thread); | |
1336 uint32_t debug_bits = 0; | |
1337 | |
609
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1338 // retrieve or create the state |
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1339 JvmtiThreadState* state = JvmtiThreadState::state_for(java_thread); |
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1340 if (state == NULL) { |
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1341 return JVMTI_ERROR_THREAD_NOT_ALIVE; |
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1342 } |
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1343 |
0 | 1344 // Check if java_thread is fully suspended |
1345 if (!is_thread_fully_suspended(java_thread, true /* wait for suspend completion */, &debug_bits)) { | |
1346 return JVMTI_ERROR_THREAD_NOT_SUSPENDED; | |
1347 } | |
1348 // Check to see if a PopFrame was already in progress | |
1349 if (java_thread->popframe_condition() != JavaThread::popframe_inactive) { | |
1350 // Probably possible for JVMTI clients to trigger this, but the | |
1351 // JPDA backend shouldn't allow this to happen | |
1352 return JVMTI_ERROR_INTERNAL; | |
1353 } | |
1354 | |
1355 { | |
1356 // Was workaround bug | |
1357 // 4812902: popFrame hangs if the method is waiting at a synchronize | |
1358 // Catch this condition and return an error to avoid hanging. | |
1359 // Now JVMTI spec allows an implementation to bail out with an opaque frame error. | |
1360 OSThread* osThread = java_thread->osthread(); | |
1361 if (osThread->get_state() == MONITOR_WAIT) { | |
1362 return JVMTI_ERROR_OPAQUE_FRAME; | |
1363 } | |
1364 } | |
1365 | |
1366 { | |
1367 ResourceMark rm(current_thread); | |
1368 // Check if there are more than one Java frame in this thread, that the top two frames | |
1369 // are Java (not native) frames, and that there is no intervening VM frame | |
1370 int frame_count = 0; | |
1371 bool is_interpreted[2]; | |
1372 intptr_t *frame_sp[2]; | |
1373 // The 2-nd arg of constructor is needed to stop iterating at java entry frame. | |
1374 for (vframeStream vfs(java_thread, true); !vfs.at_end(); vfs.next()) { | |
1375 methodHandle mh(current_thread, vfs.method()); | |
1376 if (mh->is_native()) return(JVMTI_ERROR_OPAQUE_FRAME); | |
1377 is_interpreted[frame_count] = vfs.is_interpreted_frame(); | |
1378 frame_sp[frame_count] = vfs.frame_id(); | |
1379 if (++frame_count > 1) break; | |
1380 } | |
1381 if (frame_count < 2) { | |
1382 // We haven't found two adjacent non-native Java frames on the top. | |
1383 // There can be two situations here: | |
1384 // 1. There are no more java frames | |
1385 // 2. Two top java frames are separated by non-java native frames | |
1386 if(vframeFor(java_thread, 1) == NULL) { | |
1387 return JVMTI_ERROR_NO_MORE_FRAMES; | |
1388 } else { | |
1389 // Intervening non-java native or VM frames separate java frames. | |
1390 // Current implementation does not support this. See bug #5031735. | |
1391 // In theory it is possible to pop frames in such cases. | |
1392 return JVMTI_ERROR_OPAQUE_FRAME; | |
1393 } | |
1394 } | |
1395 | |
1396 // If any of the top 2 frames is a compiled one, need to deoptimize it | |
1397 for (int i = 0; i < 2; i++) { | |
1398 if (!is_interpreted[i]) { | |
1399 VM_DeoptimizeFrame op(java_thread, frame_sp[i]); | |
1400 VMThread::execute(&op); | |
1401 } | |
1402 } | |
1403 | |
1404 // Update the thread state to reflect that the top frame is popped | |
1405 // so that cur_stack_depth is maintained properly and all frameIDs | |
1406 // are invalidated. | |
1407 // The current frame will be popped later when the suspended thread | |
1408 // is resumed and right before returning from VM to Java. | |
1409 // (see call_VM_base() in assembler_<cpu>.cpp). | |
1410 | |
1411 // It's fine to update the thread state here because no JVMTI events | |
1412 // shall be posted for this PopFrame. | |
1413 | |
1414 state->update_for_pop_top_frame(); | |
1415 java_thread->set_popframe_condition(JavaThread::popframe_pending_bit); | |
1416 // Set pending step flag for this popframe and it is cleared when next | |
1417 // step event is posted. | |
1418 state->set_pending_step_for_popframe(); | |
1419 } | |
1420 | |
1421 return JVMTI_ERROR_NONE; | |
1422 } /* end PopFrame */ | |
1423 | |
1424 | |
1425 // Threads_lock NOT held, java_thread not protected by lock | |
1426 // java_thread - pre-checked | |
1427 // java_thread - unchecked | |
1428 // depth - pre-checked as non-negative | |
1429 // method_ptr - pre-checked for NULL | |
1430 // location_ptr - pre-checked for NULL | |
1431 jvmtiError | |
1432 JvmtiEnv::GetFrameLocation(JavaThread* java_thread, jint depth, jmethodID* method_ptr, jlocation* location_ptr) { | |
1433 jvmtiError err = JVMTI_ERROR_NONE; | |
1434 uint32_t debug_bits = 0; | |
1435 | |
1436 if (is_thread_fully_suspended(java_thread, true, &debug_bits)) { | |
1437 err = get_frame_location(java_thread, depth, method_ptr, location_ptr); | |
1438 } else { | |
1439 // JVMTI get java stack frame location at safepoint. | |
1440 VM_GetFrameLocation op(this, java_thread, depth, method_ptr, location_ptr); | |
1441 VMThread::execute(&op); | |
1442 err = op.result(); | |
1443 } | |
1444 return err; | |
1445 } /* end GetFrameLocation */ | |
1446 | |
1447 | |
1448 // Threads_lock NOT held, java_thread not protected by lock | |
1449 // java_thread - pre-checked | |
1450 // java_thread - unchecked | |
1451 // depth - pre-checked as non-negative | |
1452 jvmtiError | |
1453 JvmtiEnv::NotifyFramePop(JavaThread* java_thread, jint depth) { | |
1454 ResourceMark rm; | |
1455 uint32_t debug_bits = 0; | |
1456 | |
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1457 JvmtiThreadState *state = JvmtiThreadState::state_for(java_thread); |
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1458 if (state == NULL) { |
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1459 return JVMTI_ERROR_THREAD_NOT_ALIVE; |
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1460 } |
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1461 |
0 | 1462 if (!JvmtiEnv::is_thread_fully_suspended(java_thread, true, &debug_bits)) { |
1463 return JVMTI_ERROR_THREAD_NOT_SUSPENDED; | |
1464 } | |
1465 | |
1466 if (TraceJVMTICalls) { | |
1467 JvmtiSuspendControl::print(); | |
1468 } | |
1469 | |
1470 vframe *vf = vframeFor(java_thread, depth); | |
1471 if (vf == NULL) { | |
1472 return JVMTI_ERROR_NO_MORE_FRAMES; | |
1473 } | |
1474 | |
1475 if (!vf->is_java_frame() || ((javaVFrame*) vf)->method()->is_native()) { | |
1476 return JVMTI_ERROR_OPAQUE_FRAME; | |
1477 } | |
1478 | |
1479 assert(vf->frame_pointer() != NULL, "frame pointer mustn't be NULL"); | |
1480 | |
1481 int frame_number = state->count_frames() - depth; | |
1482 state->env_thread_state(this)->set_frame_pop(frame_number); | |
1483 | |
1484 return JVMTI_ERROR_NONE; | |
1485 } /* end NotifyFramePop */ | |
1486 | |
1487 | |
1488 // | |
1489 // Force Early Return functions | |
1490 // | |
1491 | |
1492 // Threads_lock NOT held, java_thread not protected by lock | |
1493 // java_thread - pre-checked | |
1494 jvmtiError | |
1495 JvmtiEnv::ForceEarlyReturnObject(JavaThread* java_thread, jobject value) { | |
1496 jvalue val; | |
1497 val.l = value; | |
1498 return force_early_return(java_thread, val, atos); | |
1499 } /* end ForceEarlyReturnObject */ | |
1500 | |
1501 | |
1502 // Threads_lock NOT held, java_thread not protected by lock | |
1503 // java_thread - pre-checked | |
1504 jvmtiError | |
1505 JvmtiEnv::ForceEarlyReturnInt(JavaThread* java_thread, jint value) { | |
1506 jvalue val; | |
1507 val.i = value; | |
1508 return force_early_return(java_thread, val, itos); | |
1509 } /* end ForceEarlyReturnInt */ | |
1510 | |
1511 | |
1512 // Threads_lock NOT held, java_thread not protected by lock | |
1513 // java_thread - pre-checked | |
1514 jvmtiError | |
1515 JvmtiEnv::ForceEarlyReturnLong(JavaThread* java_thread, jlong value) { | |
1516 jvalue val; | |
1517 val.j = value; | |
1518 return force_early_return(java_thread, val, ltos); | |
1519 } /* end ForceEarlyReturnLong */ | |
1520 | |
1521 | |
1522 // Threads_lock NOT held, java_thread not protected by lock | |
1523 // java_thread - pre-checked | |
1524 jvmtiError | |
1525 JvmtiEnv::ForceEarlyReturnFloat(JavaThread* java_thread, jfloat value) { | |
1526 jvalue val; | |
1527 val.f = value; | |
1528 return force_early_return(java_thread, val, ftos); | |
1529 } /* end ForceEarlyReturnFloat */ | |
1530 | |
1531 | |
1532 // Threads_lock NOT held, java_thread not protected by lock | |
1533 // java_thread - pre-checked | |
1534 jvmtiError | |
1535 JvmtiEnv::ForceEarlyReturnDouble(JavaThread* java_thread, jdouble value) { | |
1536 jvalue val; | |
1537 val.d = value; | |
1538 return force_early_return(java_thread, val, dtos); | |
1539 } /* end ForceEarlyReturnDouble */ | |
1540 | |
1541 | |
1542 // Threads_lock NOT held, java_thread not protected by lock | |
1543 // java_thread - pre-checked | |
1544 jvmtiError | |
1545 JvmtiEnv::ForceEarlyReturnVoid(JavaThread* java_thread) { | |
1546 jvalue val; | |
1547 val.j = 0L; | |
1548 return force_early_return(java_thread, val, vtos); | |
1549 } /* end ForceEarlyReturnVoid */ | |
1550 | |
1551 | |
1552 // | |
1553 // Heap functions | |
1554 // | |
1555 | |
1556 // klass - NULL is a valid value, must be checked | |
1557 // initial_object - NULL is a valid value, must be checked | |
1558 // callbacks - pre-checked for NULL | |
1559 // user_data - NULL is a valid value, must be checked | |
1560 jvmtiError | |
1561 JvmtiEnv::FollowReferences(jint heap_filter, jclass klass, jobject initial_object, const jvmtiHeapCallbacks* callbacks, const void* user_data) { | |
1562 // check klass if provided | |
1563 klassOop k_oop = NULL; | |
1564 if (klass != NULL) { | |
1565 oop k_mirror = JNIHandles::resolve_external_guard(klass); | |
1566 if (k_mirror == NULL) { | |
1567 return JVMTI_ERROR_INVALID_CLASS; | |
1568 } | |
1569 if (java_lang_Class::is_primitive(k_mirror)) { | |
1570 return JVMTI_ERROR_NONE; | |
1571 } | |
1572 k_oop = java_lang_Class::as_klassOop(k_mirror); | |
1573 if (k_oop == NULL) { | |
1574 return JVMTI_ERROR_INVALID_CLASS; | |
1575 } | |
1576 } | |
1577 | |
1578 Thread *thread = Thread::current(); | |
1579 HandleMark hm(thread); | |
1580 KlassHandle kh (thread, k_oop); | |
1581 | |
1582 TraceTime t("FollowReferences", TraceJVMTIObjectTagging); | |
1583 JvmtiTagMap::tag_map_for(this)->follow_references(heap_filter, kh, initial_object, callbacks, user_data); | |
1584 return JVMTI_ERROR_NONE; | |
1585 } /* end FollowReferences */ | |
1586 | |
1587 | |
1588 // klass - NULL is a valid value, must be checked | |
1589 // callbacks - pre-checked for NULL | |
1590 // user_data - NULL is a valid value, must be checked | |
1591 jvmtiError | |
1592 JvmtiEnv::IterateThroughHeap(jint heap_filter, jclass klass, const jvmtiHeapCallbacks* callbacks, const void* user_data) { | |
1593 // check klass if provided | |
1594 klassOop k_oop = NULL; | |
1595 if (klass != NULL) { | |
1596 oop k_mirror = JNIHandles::resolve_external_guard(klass); | |
1597 if (k_mirror == NULL) { | |
1598 return JVMTI_ERROR_INVALID_CLASS; | |
1599 } | |
1600 if (java_lang_Class::is_primitive(k_mirror)) { | |
1601 return JVMTI_ERROR_NONE; | |
1602 } | |
1603 k_oop = java_lang_Class::as_klassOop(k_mirror); | |
1604 if (k_oop == NULL) { | |
1605 return JVMTI_ERROR_INVALID_CLASS; | |
1606 } | |
1607 } | |
1608 | |
1609 Thread *thread = Thread::current(); | |
1610 HandleMark hm(thread); | |
1611 KlassHandle kh (thread, k_oop); | |
1612 | |
1613 TraceTime t("IterateThroughHeap", TraceJVMTIObjectTagging); | |
1614 JvmtiTagMap::tag_map_for(this)->iterate_through_heap(heap_filter, kh, callbacks, user_data); | |
1615 return JVMTI_ERROR_NONE; | |
1616 } /* end IterateThroughHeap */ | |
1617 | |
1618 | |
1619 // tag_ptr - pre-checked for NULL | |
1620 jvmtiError | |
1621 JvmtiEnv::GetTag(jobject object, jlong* tag_ptr) { | |
1622 oop o = JNIHandles::resolve_external_guard(object); | |
1623 NULL_CHECK(o, JVMTI_ERROR_INVALID_OBJECT); | |
1624 *tag_ptr = JvmtiTagMap::tag_map_for(this)->get_tag(object); | |
1625 return JVMTI_ERROR_NONE; | |
1626 } /* end GetTag */ | |
1627 | |
1628 | |
1629 jvmtiError | |
1630 JvmtiEnv::SetTag(jobject object, jlong tag) { | |
1631 oop o = JNIHandles::resolve_external_guard(object); | |
1632 NULL_CHECK(o, JVMTI_ERROR_INVALID_OBJECT); | |
1633 JvmtiTagMap::tag_map_for(this)->set_tag(object, tag); | |
1634 return JVMTI_ERROR_NONE; | |
1635 } /* end SetTag */ | |
1636 | |
1637 | |
1638 // tag_count - pre-checked to be greater than or equal to 0 | |
1639 // tags - pre-checked for NULL | |
1640 // count_ptr - pre-checked for NULL | |
1641 // object_result_ptr - NULL is a valid value, must be checked | |
1642 // tag_result_ptr - NULL is a valid value, must be checked | |
1643 jvmtiError | |
1644 JvmtiEnv::GetObjectsWithTags(jint tag_count, const jlong* tags, jint* count_ptr, jobject** object_result_ptr, jlong** tag_result_ptr) { | |
1645 TraceTime t("GetObjectsWithTags", TraceJVMTIObjectTagging); | |
1646 return JvmtiTagMap::tag_map_for(this)->get_objects_with_tags((jlong*)tags, tag_count, count_ptr, object_result_ptr, tag_result_ptr); | |
1647 } /* end GetObjectsWithTags */ | |
1648 | |
1649 | |
1650 jvmtiError | |
1651 JvmtiEnv::ForceGarbageCollection() { | |
1652 Universe::heap()->collect(GCCause::_jvmti_force_gc); | |
1653 return JVMTI_ERROR_NONE; | |
1654 } /* end ForceGarbageCollection */ | |
1655 | |
1656 | |
1657 // | |
1658 // Heap (1.0) functions | |
1659 // | |
1660 | |
1661 // object_reference_callback - pre-checked for NULL | |
1662 // user_data - NULL is a valid value, must be checked | |
1663 jvmtiError | |
1664 JvmtiEnv::IterateOverObjectsReachableFromObject(jobject object, jvmtiObjectReferenceCallback object_reference_callback, const void* user_data) { | |
1665 oop o = JNIHandles::resolve_external_guard(object); | |
1666 NULL_CHECK(o, JVMTI_ERROR_INVALID_OBJECT); | |
1667 JvmtiTagMap::tag_map_for(this)->iterate_over_objects_reachable_from_object(object, object_reference_callback, user_data); | |
1668 return JVMTI_ERROR_NONE; | |
1669 } /* end IterateOverObjectsReachableFromObject */ | |
1670 | |
1671 | |
1672 // heap_root_callback - NULL is a valid value, must be checked | |
1673 // stack_ref_callback - NULL is a valid value, must be checked | |
1674 // object_ref_callback - NULL is a valid value, must be checked | |
1675 // user_data - NULL is a valid value, must be checked | |
1676 jvmtiError | |
1677 JvmtiEnv::IterateOverReachableObjects(jvmtiHeapRootCallback heap_root_callback, jvmtiStackReferenceCallback stack_ref_callback, jvmtiObjectReferenceCallback object_ref_callback, const void* user_data) { | |
1678 TraceTime t("IterateOverReachableObjects", TraceJVMTIObjectTagging); | |
1679 JvmtiTagMap::tag_map_for(this)->iterate_over_reachable_objects(heap_root_callback, stack_ref_callback, object_ref_callback, user_data); | |
1680 return JVMTI_ERROR_NONE; | |
1681 } /* end IterateOverReachableObjects */ | |
1682 | |
1683 | |
1684 // heap_object_callback - pre-checked for NULL | |
1685 // user_data - NULL is a valid value, must be checked | |
1686 jvmtiError | |
1687 JvmtiEnv::IterateOverHeap(jvmtiHeapObjectFilter object_filter, jvmtiHeapObjectCallback heap_object_callback, const void* user_data) { | |
1688 TraceTime t("IterateOverHeap", TraceJVMTIObjectTagging); | |
1689 Thread *thread = Thread::current(); | |
1690 HandleMark hm(thread); | |
1691 JvmtiTagMap::tag_map_for(this)->iterate_over_heap(object_filter, KlassHandle(), heap_object_callback, user_data); | |
1692 return JVMTI_ERROR_NONE; | |
1693 } /* end IterateOverHeap */ | |
1694 | |
1695 | |
1696 // k_mirror - may be primitive, this must be checked | |
1697 // heap_object_callback - pre-checked for NULL | |
1698 // user_data - NULL is a valid value, must be checked | |
1699 jvmtiError | |
1700 JvmtiEnv::IterateOverInstancesOfClass(oop k_mirror, jvmtiHeapObjectFilter object_filter, jvmtiHeapObjectCallback heap_object_callback, const void* user_data) { | |
1701 if (java_lang_Class::is_primitive(k_mirror)) { | |
1702 // DO PRIMITIVE CLASS PROCESSING | |
1703 return JVMTI_ERROR_NONE; | |
1704 } | |
1705 klassOop k_oop = java_lang_Class::as_klassOop(k_mirror); | |
1706 if (k_oop == NULL) { | |
1707 return JVMTI_ERROR_INVALID_CLASS; | |
1708 } | |
1709 Thread *thread = Thread::current(); | |
1710 HandleMark hm(thread); | |
1711 KlassHandle klass (thread, k_oop); | |
1712 TraceTime t("IterateOverInstancesOfClass", TraceJVMTIObjectTagging); | |
1713 JvmtiTagMap::tag_map_for(this)->iterate_over_heap(object_filter, klass, heap_object_callback, user_data); | |
1714 return JVMTI_ERROR_NONE; | |
1715 } /* end IterateOverInstancesOfClass */ | |
1716 | |
1717 | |
1718 // | |
1719 // Local Variable functions | |
1720 // | |
1721 | |
1722 // Threads_lock NOT held, java_thread not protected by lock | |
1723 // java_thread - pre-checked | |
1724 // java_thread - unchecked | |
1725 // depth - pre-checked as non-negative | |
1726 // value_ptr - pre-checked for NULL | |
1727 jvmtiError | |
1728 JvmtiEnv::GetLocalObject(JavaThread* java_thread, jint depth, jint slot, jobject* value_ptr) { | |
1729 JavaThread* current_thread = JavaThread::current(); | |
1730 // rm object is created to clean up the javaVFrame created in | |
1731 // doit_prologue(), but after doit() is finished with it. | |
1732 ResourceMark rm(current_thread); | |
1733 | |
1734 VM_GetOrSetLocal op(java_thread, current_thread, depth, slot); | |
1735 VMThread::execute(&op); | |
1736 jvmtiError err = op.result(); | |
1737 if (err != JVMTI_ERROR_NONE) { | |
1738 return err; | |
1739 } else { | |
1740 *value_ptr = op.value().l; | |
1741 return JVMTI_ERROR_NONE; | |
1742 } | |
1743 } /* end GetLocalObject */ | |
1744 | |
1745 | |
1746 // Threads_lock NOT held, java_thread not protected by lock | |
1747 // java_thread - pre-checked | |
1748 // java_thread - unchecked | |
1749 // depth - pre-checked as non-negative | |
1750 // value_ptr - pre-checked for NULL | |
1751 jvmtiError | |
1752 JvmtiEnv::GetLocalInt(JavaThread* java_thread, jint depth, jint slot, jint* value_ptr) { | |
1753 // rm object is created to clean up the javaVFrame created in | |
1754 // doit_prologue(), but after doit() is finished with it. | |
1755 ResourceMark rm; | |
1756 | |
1757 VM_GetOrSetLocal op(java_thread, depth, slot, T_INT); | |
1758 VMThread::execute(&op); | |
1759 *value_ptr = op.value().i; | |
1760 return op.result(); | |
1761 } /* end GetLocalInt */ | |
1762 | |
1763 | |
1764 // Threads_lock NOT held, java_thread not protected by lock | |
1765 // java_thread - pre-checked | |
1766 // java_thread - unchecked | |
1767 // depth - pre-checked as non-negative | |
1768 // value_ptr - pre-checked for NULL | |
1769 jvmtiError | |
1770 JvmtiEnv::GetLocalLong(JavaThread* java_thread, jint depth, jint slot, jlong* value_ptr) { | |
1771 // rm object is created to clean up the javaVFrame created in | |
1772 // doit_prologue(), but after doit() is finished with it. | |
1773 ResourceMark rm; | |
1774 | |
1775 VM_GetOrSetLocal op(java_thread, depth, slot, T_LONG); | |
1776 VMThread::execute(&op); | |
1777 *value_ptr = op.value().j; | |
1778 return op.result(); | |
1779 } /* end GetLocalLong */ | |
1780 | |
1781 | |
1782 // Threads_lock NOT held, java_thread not protected by lock | |
1783 // java_thread - pre-checked | |
1784 // java_thread - unchecked | |
1785 // depth - pre-checked as non-negative | |
1786 // value_ptr - pre-checked for NULL | |
1787 jvmtiError | |
1788 JvmtiEnv::GetLocalFloat(JavaThread* java_thread, jint depth, jint slot, jfloat* value_ptr) { | |
1789 // rm object is created to clean up the javaVFrame created in | |
1790 // doit_prologue(), but after doit() is finished with it. | |
1791 ResourceMark rm; | |
1792 | |
1793 VM_GetOrSetLocal op(java_thread, depth, slot, T_FLOAT); | |
1794 VMThread::execute(&op); | |
1795 *value_ptr = op.value().f; | |
1796 return op.result(); | |
1797 } /* end GetLocalFloat */ | |
1798 | |
1799 | |
1800 // Threads_lock NOT held, java_thread not protected by lock | |
1801 // java_thread - pre-checked | |
1802 // java_thread - unchecked | |
1803 // depth - pre-checked as non-negative | |
1804 // value_ptr - pre-checked for NULL | |
1805 jvmtiError | |
1806 JvmtiEnv::GetLocalDouble(JavaThread* java_thread, jint depth, jint slot, jdouble* value_ptr) { | |
1807 // rm object is created to clean up the javaVFrame created in | |
1808 // doit_prologue(), but after doit() is finished with it. | |
1809 ResourceMark rm; | |
1810 | |
1811 VM_GetOrSetLocal op(java_thread, depth, slot, T_DOUBLE); | |
1812 VMThread::execute(&op); | |
1813 *value_ptr = op.value().d; | |
1814 return op.result(); | |
1815 } /* end GetLocalDouble */ | |
1816 | |
1817 | |
1818 // Threads_lock NOT held, java_thread not protected by lock | |
1819 // java_thread - pre-checked | |
1820 // java_thread - unchecked | |
1821 // depth - pre-checked as non-negative | |
1822 jvmtiError | |
1823 JvmtiEnv::SetLocalObject(JavaThread* java_thread, jint depth, jint slot, jobject value) { | |
1824 // rm object is created to clean up the javaVFrame created in | |
1825 // doit_prologue(), but after doit() is finished with it. | |
1826 ResourceMark rm; | |
1827 jvalue val; | |
1828 val.l = value; | |
1829 VM_GetOrSetLocal op(java_thread, depth, slot, T_OBJECT, val); | |
1830 VMThread::execute(&op); | |
1831 return op.result(); | |
1832 } /* end SetLocalObject */ | |
1833 | |
1834 | |
1835 // Threads_lock NOT held, java_thread not protected by lock | |
1836 // java_thread - pre-checked | |
1837 // java_thread - unchecked | |
1838 // depth - pre-checked as non-negative | |
1839 jvmtiError | |
1840 JvmtiEnv::SetLocalInt(JavaThread* java_thread, jint depth, jint slot, jint value) { | |
1841 // rm object is created to clean up the javaVFrame created in | |
1842 // doit_prologue(), but after doit() is finished with it. | |
1843 ResourceMark rm; | |
1844 jvalue val; | |
1845 val.i = value; | |
1846 VM_GetOrSetLocal op(java_thread, depth, slot, T_INT, val); | |
1847 VMThread::execute(&op); | |
1848 return op.result(); | |
1849 } /* end SetLocalInt */ | |
1850 | |
1851 | |
1852 // Threads_lock NOT held, java_thread not protected by lock | |
1853 // java_thread - pre-checked | |
1854 // java_thread - unchecked | |
1855 // depth - pre-checked as non-negative | |
1856 jvmtiError | |
1857 JvmtiEnv::SetLocalLong(JavaThread* java_thread, jint depth, jint slot, jlong value) { | |
1858 // rm object is created to clean up the javaVFrame created in | |
1859 // doit_prologue(), but after doit() is finished with it. | |
1860 ResourceMark rm; | |
1861 jvalue val; | |
1862 val.j = value; | |
1863 VM_GetOrSetLocal op(java_thread, depth, slot, T_LONG, val); | |
1864 VMThread::execute(&op); | |
1865 return op.result(); | |
1866 } /* end SetLocalLong */ | |
1867 | |
1868 | |
1869 // Threads_lock NOT held, java_thread not protected by lock | |
1870 // java_thread - pre-checked | |
1871 // java_thread - unchecked | |
1872 // depth - pre-checked as non-negative | |
1873 jvmtiError | |
1874 JvmtiEnv::SetLocalFloat(JavaThread* java_thread, jint depth, jint slot, jfloat value) { | |
1875 // rm object is created to clean up the javaVFrame created in | |
1876 // doit_prologue(), but after doit() is finished with it. | |
1877 ResourceMark rm; | |
1878 jvalue val; | |
1879 val.f = value; | |
1880 VM_GetOrSetLocal op(java_thread, depth, slot, T_FLOAT, val); | |
1881 VMThread::execute(&op); | |
1882 return op.result(); | |
1883 } /* end SetLocalFloat */ | |
1884 | |
1885 | |
1886 // Threads_lock NOT held, java_thread not protected by lock | |
1887 // java_thread - pre-checked | |
1888 // java_thread - unchecked | |
1889 // depth - pre-checked as non-negative | |
1890 jvmtiError | |
1891 JvmtiEnv::SetLocalDouble(JavaThread* java_thread, jint depth, jint slot, jdouble value) { | |
1892 // rm object is created to clean up the javaVFrame created in | |
1893 // doit_prologue(), but after doit() is finished with it. | |
1894 ResourceMark rm; | |
1895 jvalue val; | |
1896 val.d = value; | |
1897 VM_GetOrSetLocal op(java_thread, depth, slot, T_DOUBLE, val); | |
1898 VMThread::execute(&op); | |
1899 return op.result(); | |
1900 } /* end SetLocalDouble */ | |
1901 | |
1902 | |
1903 // | |
1904 // Breakpoint functions | |
1905 // | |
1906 | |
1907 // method_oop - pre-checked for validity, but may be NULL meaning obsolete method | |
1908 jvmtiError | |
1909 JvmtiEnv::SetBreakpoint(methodOop method_oop, jlocation location) { | |
1910 NULL_CHECK(method_oop, JVMTI_ERROR_INVALID_METHODID); | |
1911 if (location < 0) { // simple invalid location check first | |
1912 return JVMTI_ERROR_INVALID_LOCATION; | |
1913 } | |
1914 // verify that the breakpoint is not past the end of the method | |
1915 if (location >= (jlocation) method_oop->code_size()) { | |
1916 return JVMTI_ERROR_INVALID_LOCATION; | |
1917 } | |
1918 | |
1919 ResourceMark rm; | |
1920 JvmtiBreakpoint bp(method_oop, location); | |
1921 JvmtiBreakpoints& jvmti_breakpoints = JvmtiCurrentBreakpoints::get_jvmti_breakpoints(); | |
1922 if (jvmti_breakpoints.set(bp) == JVMTI_ERROR_DUPLICATE) | |
1923 return JVMTI_ERROR_DUPLICATE; | |
1924 | |
1925 if (TraceJVMTICalls) { | |
1926 jvmti_breakpoints.print(); | |
1927 } | |
1928 | |
1929 return JVMTI_ERROR_NONE; | |
1930 } /* end SetBreakpoint */ | |
1931 | |
1932 | |
1933 // method_oop - pre-checked for validity, but may be NULL meaning obsolete method | |
1934 jvmtiError | |
1935 JvmtiEnv::ClearBreakpoint(methodOop method_oop, jlocation location) { | |
1936 NULL_CHECK(method_oop, JVMTI_ERROR_INVALID_METHODID); | |
1937 | |
1938 if (location < 0) { // simple invalid location check first | |
1939 return JVMTI_ERROR_INVALID_LOCATION; | |
1940 } | |
1941 | |
1942 // verify that the breakpoint is not past the end of the method | |
1943 if (location >= (jlocation) method_oop->code_size()) { | |
1944 return JVMTI_ERROR_INVALID_LOCATION; | |
1945 } | |
1946 | |
1947 JvmtiBreakpoint bp(method_oop, location); | |
1948 | |
1949 JvmtiBreakpoints& jvmti_breakpoints = JvmtiCurrentBreakpoints::get_jvmti_breakpoints(); | |
1950 if (jvmti_breakpoints.clear(bp) == JVMTI_ERROR_NOT_FOUND) | |
1951 return JVMTI_ERROR_NOT_FOUND; | |
1952 | |
1953 if (TraceJVMTICalls) { | |
1954 jvmti_breakpoints.print(); | |
1955 } | |
1956 | |
1957 return JVMTI_ERROR_NONE; | |
1958 } /* end ClearBreakpoint */ | |
1959 | |
1960 | |
1961 // | |
1962 // Watched Field functions | |
1963 // | |
1964 | |
1965 jvmtiError | |
1966 JvmtiEnv::SetFieldAccessWatch(fieldDescriptor* fdesc_ptr) { | |
1967 // make sure we haven't set this watch before | |
1968 if (fdesc_ptr->is_field_access_watched()) return JVMTI_ERROR_DUPLICATE; | |
1969 fdesc_ptr->set_is_field_access_watched(true); | |
1970 update_klass_field_access_flag(fdesc_ptr); | |
1971 | |
1972 JvmtiEventController::change_field_watch(JVMTI_EVENT_FIELD_ACCESS, true); | |
1973 | |
1974 return JVMTI_ERROR_NONE; | |
1975 } /* end SetFieldAccessWatch */ | |
1976 | |
1977 | |
1978 jvmtiError | |
1979 JvmtiEnv::ClearFieldAccessWatch(fieldDescriptor* fdesc_ptr) { | |
1980 // make sure we have a watch to clear | |
1981 if (!fdesc_ptr->is_field_access_watched()) return JVMTI_ERROR_NOT_FOUND; | |
1982 fdesc_ptr->set_is_field_access_watched(false); | |
1983 update_klass_field_access_flag(fdesc_ptr); | |
1984 | |
1985 JvmtiEventController::change_field_watch(JVMTI_EVENT_FIELD_ACCESS, false); | |
1986 | |
1987 return JVMTI_ERROR_NONE; | |
1988 } /* end ClearFieldAccessWatch */ | |
1989 | |
1990 | |
1991 jvmtiError | |
1992 JvmtiEnv::SetFieldModificationWatch(fieldDescriptor* fdesc_ptr) { | |
1993 // make sure we haven't set this watch before | |
1994 if (fdesc_ptr->is_field_modification_watched()) return JVMTI_ERROR_DUPLICATE; | |
1995 fdesc_ptr->set_is_field_modification_watched(true); | |
1996 update_klass_field_access_flag(fdesc_ptr); | |
1997 | |
1998 JvmtiEventController::change_field_watch(JVMTI_EVENT_FIELD_MODIFICATION, true); | |
1999 | |
2000 return JVMTI_ERROR_NONE; | |
2001 } /* end SetFieldModificationWatch */ | |
2002 | |
2003 | |
2004 jvmtiError | |
2005 JvmtiEnv::ClearFieldModificationWatch(fieldDescriptor* fdesc_ptr) { | |
2006 // make sure we have a watch to clear | |
2007 if (!fdesc_ptr->is_field_modification_watched()) return JVMTI_ERROR_NOT_FOUND; | |
2008 fdesc_ptr->set_is_field_modification_watched(false); | |
2009 update_klass_field_access_flag(fdesc_ptr); | |
2010 | |
2011 JvmtiEventController::change_field_watch(JVMTI_EVENT_FIELD_MODIFICATION, false); | |
2012 | |
2013 return JVMTI_ERROR_NONE; | |
2014 } /* end ClearFieldModificationWatch */ | |
2015 | |
2016 // | |
2017 // Class functions | |
2018 // | |
2019 | |
2020 | |
2021 // k_mirror - may be primitive, this must be checked | |
2022 // signature_ptr - NULL is a valid value, must be checked | |
2023 // generic_ptr - NULL is a valid value, must be checked | |
2024 jvmtiError | |
2025 JvmtiEnv::GetClassSignature(oop k_mirror, char** signature_ptr, char** generic_ptr) { | |
2026 ResourceMark rm; | |
2027 bool isPrimitive = java_lang_Class::is_primitive(k_mirror); | |
2028 klassOop k = NULL; | |
2029 if (!isPrimitive) { | |
2030 k = java_lang_Class::as_klassOop(k_mirror); | |
2031 NULL_CHECK(k, JVMTI_ERROR_INVALID_CLASS); | |
2032 } | |
2033 if (signature_ptr != NULL) { | |
2034 char* result = NULL; | |
2035 if (isPrimitive) { | |
2036 char tchar = type2char(java_lang_Class::primitive_type(k_mirror)); | |
2037 result = (char*) jvmtiMalloc(2); | |
2038 result[0] = tchar; | |
2039 result[1] = '\0'; | |
2040 } else { | |
2041 const char* class_sig = Klass::cast(k)->signature_name(); | |
2042 result = (char *) jvmtiMalloc(strlen(class_sig)+1); | |
2043 strcpy(result, class_sig); | |
2044 } | |
2045 *signature_ptr = result; | |
2046 } | |
2047 if (generic_ptr != NULL) { | |
2048 *generic_ptr = NULL; | |
2049 if (!isPrimitive && Klass::cast(k)->oop_is_instance()) { | |
2050 symbolOop soo = instanceKlass::cast(k)->generic_signature(); | |
2051 if (soo != NULL) { | |
2052 const char *gen_sig = soo->as_C_string(); | |
2053 if (gen_sig != NULL) { | |
2054 char* gen_result; | |
2055 jvmtiError err = allocate(strlen(gen_sig) + 1, | |
2056 (unsigned char **)&gen_result); | |
2057 if (err != JVMTI_ERROR_NONE) { | |
2058 return err; | |
2059 } | |
2060 strcpy(gen_result, gen_sig); | |
2061 *generic_ptr = gen_result; | |
2062 } | |
2063 } | |
2064 } | |
2065 } | |
2066 return JVMTI_ERROR_NONE; | |
2067 } /* end GetClassSignature */ | |
2068 | |
2069 | |
2070 // k_mirror - may be primitive, this must be checked | |
2071 // status_ptr - pre-checked for NULL | |
2072 jvmtiError | |
2073 JvmtiEnv::GetClassStatus(oop k_mirror, jint* status_ptr) { | |
2074 jint result = 0; | |
2075 if (java_lang_Class::is_primitive(k_mirror)) { | |
2076 result |= JVMTI_CLASS_STATUS_PRIMITIVE; | |
2077 } else { | |
2078 klassOop k = java_lang_Class::as_klassOop(k_mirror); | |
2079 NULL_CHECK(k, JVMTI_ERROR_INVALID_CLASS); | |
2080 result = Klass::cast(k)->jvmti_class_status(); | |
2081 } | |
2082 *status_ptr = result; | |
2083 | |
2084 return JVMTI_ERROR_NONE; | |
2085 } /* end GetClassStatus */ | |
2086 | |
2087 | |
2088 // k_mirror - may be primitive, this must be checked | |
2089 // source_name_ptr - pre-checked for NULL | |
2090 jvmtiError | |
2091 JvmtiEnv::GetSourceFileName(oop k_mirror, char** source_name_ptr) { | |
2092 if (java_lang_Class::is_primitive(k_mirror)) { | |
2093 return JVMTI_ERROR_ABSENT_INFORMATION; | |
2094 } | |
2095 klassOop k_klass = java_lang_Class::as_klassOop(k_mirror); | |
2096 NULL_CHECK(k_klass, JVMTI_ERROR_INVALID_CLASS); | |
2097 | |
2098 if (!Klass::cast(k_klass)->oop_is_instance()) { | |
2099 return JVMTI_ERROR_ABSENT_INFORMATION; | |
2100 } | |
2101 | |
2102 symbolOop sfnOop = instanceKlass::cast(k_klass)->source_file_name(); | |
2103 NULL_CHECK(sfnOop, JVMTI_ERROR_ABSENT_INFORMATION); | |
2104 { | |
2105 JavaThread* current_thread = JavaThread::current(); | |
2106 ResourceMark rm(current_thread); | |
2107 const char* sfncp = (const char*) sfnOop->as_C_string(); | |
2108 *source_name_ptr = (char *) jvmtiMalloc(strlen(sfncp)+1); | |
2109 strcpy(*source_name_ptr, sfncp); | |
2110 } | |
2111 | |
2112 return JVMTI_ERROR_NONE; | |
2113 } /* end GetSourceFileName */ | |
2114 | |
2115 | |
2116 // k_mirror - may be primitive, this must be checked | |
2117 // modifiers_ptr - pre-checked for NULL | |
2118 jvmtiError | |
2119 JvmtiEnv::GetClassModifiers(oop k_mirror, jint* modifiers_ptr) { | |
2120 JavaThread* current_thread = JavaThread::current(); | |
2121 jint result = 0; | |
2122 if (!java_lang_Class::is_primitive(k_mirror)) { | |
2123 klassOop k = java_lang_Class::as_klassOop(k_mirror); | |
2124 NULL_CHECK(k, JVMTI_ERROR_INVALID_CLASS); | |
2125 assert((Klass::cast(k)->oop_is_instance() || Klass::cast(k)->oop_is_array()), "should be an instance or an array klass"); | |
2126 result = Klass::cast(k)->compute_modifier_flags(current_thread); | |
2127 JavaThread* THREAD = current_thread; // pass to macros | |
2128 if (HAS_PENDING_EXCEPTION) { | |
2129 CLEAR_PENDING_EXCEPTION; | |
2130 return JVMTI_ERROR_INTERNAL; | |
2131 }; | |
2132 | |
2133 // Reset the deleted ACC_SUPER bit ( deleted in compute_modifier_flags()). | |
2134 if(Klass::cast(k)->is_super()) { | |
2135 result |= JVM_ACC_SUPER; | |
2136 } | |
2137 } else { | |
2138 result = (JVM_ACC_ABSTRACT | JVM_ACC_FINAL | JVM_ACC_PUBLIC); | |
2139 } | |
2140 *modifiers_ptr = result; | |
2141 | |
2142 return JVMTI_ERROR_NONE; | |
2143 } /* end GetClassModifiers */ | |
2144 | |
2145 | |
2146 // k_mirror - may be primitive, this must be checked | |
2147 // method_count_ptr - pre-checked for NULL | |
2148 // methods_ptr - pre-checked for NULL | |
2149 jvmtiError | |
2150 JvmtiEnv::GetClassMethods(oop k_mirror, jint* method_count_ptr, jmethodID** methods_ptr) { | |
2151 JavaThread* current_thread = JavaThread::current(); | |
2152 HandleMark hm(current_thread); | |
2153 | |
2154 if (java_lang_Class::is_primitive(k_mirror)) { | |
2155 *method_count_ptr = 0; | |
2156 *methods_ptr = (jmethodID*) jvmtiMalloc(0 * sizeof(jmethodID)); | |
2157 return JVMTI_ERROR_NONE; | |
2158 } | |
2159 klassOop k = java_lang_Class::as_klassOop(k_mirror); | |
2160 NULL_CHECK(k, JVMTI_ERROR_INVALID_CLASS); | |
2161 | |
2162 // Return CLASS_NOT_PREPARED error as per JVMTI spec. | |
2163 if (!(Klass::cast(k)->jvmti_class_status() & (JVMTI_CLASS_STATUS_PREPARED|JVMTI_CLASS_STATUS_ARRAY) )) { | |
2164 return JVMTI_ERROR_CLASS_NOT_PREPARED; | |
2165 } | |
2166 | |
2167 if (!Klass::cast(k)->oop_is_instance()) { | |
2168 *method_count_ptr = 0; | |
2169 *methods_ptr = (jmethodID*) jvmtiMalloc(0 * sizeof(jmethodID)); | |
2170 return JVMTI_ERROR_NONE; | |
2171 } | |
2172 instanceKlassHandle instanceK_h(current_thread, k); | |
2173 // Allocate the result and fill it in | |
2174 int result_length = instanceK_h->methods()->length(); | |
2175 jmethodID* result_list = (jmethodID*)jvmtiMalloc(result_length * sizeof(jmethodID)); | |
2176 int index; | |
2177 if (JvmtiExport::can_maintain_original_method_order()) { | |
2178 // Use the original method ordering indices stored in the class, so we can emit | |
2179 // jmethodIDs in the order they appeared in the class file | |
2180 for (index = 0; index < result_length; index++) { | |
2181 methodOop m = methodOop(instanceK_h->methods()->obj_at(index)); | |
2182 int original_index = instanceK_h->method_ordering()->int_at(index); | |
2183 assert(original_index >= 0 && original_index < result_length, "invalid original method index"); | |
2184 jmethodID id = m->jmethod_id(); | |
2185 result_list[original_index] = id; | |
2186 } | |
2187 } else { | |
2188 // otherwise just copy in any order | |
2189 for (index = 0; index < result_length; index++) { | |
2190 methodOop m = methodOop(instanceK_h->methods()->obj_at(index)); | |
2191 jmethodID id = m->jmethod_id(); | |
2192 result_list[index] = id; | |
2193 } | |
2194 } | |
2195 // Fill in return value. | |
2196 *method_count_ptr = result_length; | |
2197 *methods_ptr = result_list; | |
2198 | |
2199 return JVMTI_ERROR_NONE; | |
2200 } /* end GetClassMethods */ | |
2201 | |
2202 | |
2203 // k_mirror - may be primitive, this must be checked | |
2204 // field_count_ptr - pre-checked for NULL | |
2205 // fields_ptr - pre-checked for NULL | |
2206 jvmtiError | |
2207 JvmtiEnv::GetClassFields(oop k_mirror, jint* field_count_ptr, jfieldID** fields_ptr) { | |
2208 if (java_lang_Class::is_primitive(k_mirror)) { | |
2209 *field_count_ptr = 0; | |
2210 *fields_ptr = (jfieldID*) jvmtiMalloc(0 * sizeof(jfieldID)); | |
2211 return JVMTI_ERROR_NONE; | |
2212 } | |
2213 JavaThread* current_thread = JavaThread::current(); | |
2214 HandleMark hm(current_thread); | |
2215 klassOop k = java_lang_Class::as_klassOop(k_mirror); | |
2216 NULL_CHECK(k, JVMTI_ERROR_INVALID_CLASS); | |
2217 | |
2218 // Return CLASS_NOT_PREPARED error as per JVMTI spec. | |
2219 if (!(Klass::cast(k)->jvmti_class_status() & (JVMTI_CLASS_STATUS_PREPARED|JVMTI_CLASS_STATUS_ARRAY) )) { | |
2220 return JVMTI_ERROR_CLASS_NOT_PREPARED; | |
2221 } | |
2222 | |
2223 if (!Klass::cast(k)->oop_is_instance()) { | |
2224 *field_count_ptr = 0; | |
2225 *fields_ptr = (jfieldID*) jvmtiMalloc(0 * sizeof(jfieldID)); | |
2226 return JVMTI_ERROR_NONE; | |
2227 } | |
2228 | |
2229 | |
2230 instanceKlassHandle instanceK_h(current_thread, k); | |
2231 | |
2232 int result_count = 0; | |
2233 // First, count the fields. | |
2234 FilteredFieldStream flds(instanceK_h, true, true); | |
2235 result_count = flds.field_count(); | |
2236 | |
2237 // Allocate the result and fill it in | |
2238 jfieldID* result_list = (jfieldID*) jvmtiMalloc(result_count * sizeof(jfieldID)); | |
2239 // The JVMTI spec requires fields in the order they occur in the class file, | |
2240 // this is the reverse order of what FieldStream hands out. | |
2241 int id_index = (result_count - 1); | |
2242 | |
2243 for (FilteredFieldStream src_st(instanceK_h, true, true); !src_st.eos(); src_st.next()) { | |
2244 result_list[id_index--] = jfieldIDWorkaround::to_jfieldID( | |
2245 instanceK_h, src_st.offset(), | |
2246 src_st.access_flags().is_static()); | |
2247 } | |
2248 assert(id_index == -1, "just checking"); | |
2249 // Fill in the results | |
2250 *field_count_ptr = result_count; | |
2251 *fields_ptr = result_list; | |
2252 | |
2253 return JVMTI_ERROR_NONE; | |
2254 } /* end GetClassFields */ | |
2255 | |
2256 | |
2257 // k_mirror - may be primitive, this must be checked | |
2258 // interface_count_ptr - pre-checked for NULL | |
2259 // interfaces_ptr - pre-checked for NULL | |
2260 jvmtiError | |
2261 JvmtiEnv::GetImplementedInterfaces(oop k_mirror, jint* interface_count_ptr, jclass** interfaces_ptr) { | |
2262 { | |
2263 if (java_lang_Class::is_primitive(k_mirror)) { | |
2264 *interface_count_ptr = 0; | |
2265 *interfaces_ptr = (jclass*) jvmtiMalloc(0 * sizeof(jclass)); | |
2266 return JVMTI_ERROR_NONE; | |
2267 } | |
2268 JavaThread* current_thread = JavaThread::current(); | |
2269 HandleMark hm(current_thread); | |
2270 klassOop k = java_lang_Class::as_klassOop(k_mirror); | |
2271 NULL_CHECK(k, JVMTI_ERROR_INVALID_CLASS); | |
2272 | |
2273 // Return CLASS_NOT_PREPARED error as per JVMTI spec. | |
2274 if (!(Klass::cast(k)->jvmti_class_status() & (JVMTI_CLASS_STATUS_PREPARED|JVMTI_CLASS_STATUS_ARRAY) )) | |
2275 return JVMTI_ERROR_CLASS_NOT_PREPARED; | |
2276 | |
2277 if (!Klass::cast(k)->oop_is_instance()) { | |
2278 *interface_count_ptr = 0; | |
2279 *interfaces_ptr = (jclass*) jvmtiMalloc(0 * sizeof(jclass)); | |
2280 return JVMTI_ERROR_NONE; | |
2281 } | |
2282 | |
2283 objArrayHandle interface_list(current_thread, instanceKlass::cast(k)->local_interfaces()); | |
2284 const int result_length = (interface_list.is_null() ? 0 : interface_list->length()); | |
2285 jclass* result_list = (jclass*) jvmtiMalloc(result_length * sizeof(jclass)); | |
2286 for (int i_index = 0; i_index < result_length; i_index += 1) { | |
2287 oop oop_at = interface_list->obj_at(i_index); | |
2288 assert(oop_at->is_klass(), "interfaces must be klassOops"); | |
2289 klassOop klassOop_at = klassOop(oop_at); // ???: is there a better way? | |
2290 assert(Klass::cast(klassOop_at)->is_interface(), "interfaces must be interfaces"); | |
2291 oop mirror_at = Klass::cast(klassOop_at)->java_mirror(); | |
2292 Handle handle_at = Handle(current_thread, mirror_at); | |
2293 result_list[i_index] = (jclass) jni_reference(handle_at); | |
2294 } | |
2295 *interface_count_ptr = result_length; | |
2296 *interfaces_ptr = result_list; | |
2297 } | |
2298 | |
2299 return JVMTI_ERROR_NONE; | |
2300 } /* end GetImplementedInterfaces */ | |
2301 | |
2302 | |
2303 // k_mirror - may be primitive, this must be checked | |
2304 // minor_version_ptr - pre-checked for NULL | |
2305 // major_version_ptr - pre-checked for NULL | |
2306 jvmtiError | |
2307 JvmtiEnv::GetClassVersionNumbers(oop k_mirror, jint* minor_version_ptr, jint* major_version_ptr) { | |
2308 if (java_lang_Class::is_primitive(k_mirror)) { | |
2309 return JVMTI_ERROR_ABSENT_INFORMATION; | |
2310 } | |
2311 klassOop k_oop = java_lang_Class::as_klassOop(k_mirror); | |
2312 Thread *thread = Thread::current(); | |
2313 HandleMark hm(thread); | |
2314 KlassHandle klass(thread, k_oop); | |
2315 | |
2316 jint status = klass->jvmti_class_status(); | |
2317 if (status & (JVMTI_CLASS_STATUS_ERROR)) { | |
2318 return JVMTI_ERROR_INVALID_CLASS; | |
2319 } | |
2320 if (status & (JVMTI_CLASS_STATUS_ARRAY)) { | |
2321 return JVMTI_ERROR_ABSENT_INFORMATION; | |
2322 } | |
2323 | |
2324 instanceKlassHandle ik(thread, k_oop); | |
2325 *minor_version_ptr = ik->minor_version(); | |
2326 *major_version_ptr = ik->major_version(); | |
2327 | |
2328 return JVMTI_ERROR_NONE; | |
2329 } /* end GetClassVersionNumbers */ | |
2330 | |
2331 | |
2332 // k_mirror - may be primitive, this must be checked | |
2333 // constant_pool_count_ptr - pre-checked for NULL | |
2334 // constant_pool_byte_count_ptr - pre-checked for NULL | |
2335 // constant_pool_bytes_ptr - pre-checked for NULL | |
2336 jvmtiError | |
2337 JvmtiEnv::GetConstantPool(oop k_mirror, jint* constant_pool_count_ptr, jint* constant_pool_byte_count_ptr, unsigned char** constant_pool_bytes_ptr) { | |
2338 if (java_lang_Class::is_primitive(k_mirror)) { | |
2339 return JVMTI_ERROR_ABSENT_INFORMATION; | |
2340 } | |
2341 | |
2342 klassOop k_oop = java_lang_Class::as_klassOop(k_mirror); | |
2343 Thread *thread = Thread::current(); | |
2344 HandleMark hm(thread); | |
2345 ResourceMark rm(thread); | |
2346 KlassHandle klass(thread, k_oop); | |
2347 | |
2348 jint status = klass->jvmti_class_status(); | |
2349 if (status & (JVMTI_CLASS_STATUS_ERROR)) { | |
2350 return JVMTI_ERROR_INVALID_CLASS; | |
2351 } | |
2352 if (status & (JVMTI_CLASS_STATUS_ARRAY)) { | |
2353 return JVMTI_ERROR_ABSENT_INFORMATION; | |
2354 } | |
2355 | |
2356 instanceKlassHandle ikh(thread, k_oop); | |
2357 constantPoolHandle constants(thread, ikh->constants()); | |
2358 ObjectLocker ol(constants, thread); // lock constant pool while we query it | |
2359 | |
2360 JvmtiConstantPoolReconstituter reconstituter(ikh); | |
2361 if (reconstituter.get_error() != JVMTI_ERROR_NONE) { | |
2362 return reconstituter.get_error(); | |
2363 } | |
2364 | |
2365 unsigned char *cpool_bytes; | |
2366 int cpool_size = reconstituter.cpool_size(); | |
2367 if (reconstituter.get_error() != JVMTI_ERROR_NONE) { | |
2368 return reconstituter.get_error(); | |
2369 } | |
2370 jvmtiError res = allocate(cpool_size, &cpool_bytes); | |
2371 if (res != JVMTI_ERROR_NONE) { | |
2372 return res; | |
2373 } | |
2374 reconstituter.copy_cpool_bytes(cpool_bytes); | |
2375 if (reconstituter.get_error() != JVMTI_ERROR_NONE) { | |
2376 return reconstituter.get_error(); | |
2377 } | |
2378 | |
2379 *constant_pool_count_ptr = constants->length(); | |
2380 *constant_pool_byte_count_ptr = cpool_size; | |
2381 *constant_pool_bytes_ptr = cpool_bytes; | |
2382 | |
2383 return JVMTI_ERROR_NONE; | |
2384 } /* end GetConstantPool */ | |
2385 | |
2386 | |
2387 // k_mirror - may be primitive, this must be checked | |
2388 // is_interface_ptr - pre-checked for NULL | |
2389 jvmtiError | |
2390 JvmtiEnv::IsInterface(oop k_mirror, jboolean* is_interface_ptr) { | |
2391 { | |
2392 bool result = false; | |
2393 if (!java_lang_Class::is_primitive(k_mirror)) { | |
2394 klassOop k = java_lang_Class::as_klassOop(k_mirror); | |
2395 if (k != NULL && Klass::cast(k)->is_interface()) { | |
2396 result = true; | |
2397 } | |
2398 } | |
2399 *is_interface_ptr = result; | |
2400 } | |
2401 | |
2402 return JVMTI_ERROR_NONE; | |
2403 } /* end IsInterface */ | |
2404 | |
2405 | |
2406 // k_mirror - may be primitive, this must be checked | |
2407 // is_array_class_ptr - pre-checked for NULL | |
2408 jvmtiError | |
2409 JvmtiEnv::IsArrayClass(oop k_mirror, jboolean* is_array_class_ptr) { | |
2410 { | |
2411 bool result = false; | |
2412 if (!java_lang_Class::is_primitive(k_mirror)) { | |
2413 klassOop k = java_lang_Class::as_klassOop(k_mirror); | |
2414 if (k != NULL && Klass::cast(k)->oop_is_array()) { | |
2415 result = true; | |
2416 } | |
2417 } | |
2418 *is_array_class_ptr = result; | |
2419 } | |
2420 | |
2421 return JVMTI_ERROR_NONE; | |
2422 } /* end IsArrayClass */ | |
2423 | |
2424 | |
2425 // k_mirror - may be primitive, this must be checked | |
2426 // classloader_ptr - pre-checked for NULL | |
2427 jvmtiError | |
2428 JvmtiEnv::GetClassLoader(oop k_mirror, jobject* classloader_ptr) { | |
2429 { | |
2430 if (java_lang_Class::is_primitive(k_mirror)) { | |
2431 *classloader_ptr = (jclass) jni_reference(Handle()); | |
2432 return JVMTI_ERROR_NONE; | |
2433 } | |
2434 JavaThread* current_thread = JavaThread::current(); | |
2435 HandleMark hm(current_thread); | |
2436 klassOop k = java_lang_Class::as_klassOop(k_mirror); | |
2437 NULL_CHECK(k, JVMTI_ERROR_INVALID_CLASS); | |
2438 | |
2439 oop result_oop = Klass::cast(k)->class_loader(); | |
2440 if (result_oop == NULL) { | |
2441 *classloader_ptr = (jclass) jni_reference(Handle()); | |
2442 return JVMTI_ERROR_NONE; | |
2443 } | |
2444 Handle result_handle = Handle(current_thread, result_oop); | |
2445 jclass result_jnihandle = (jclass) jni_reference(result_handle); | |
2446 *classloader_ptr = result_jnihandle; | |
2447 } | |
2448 return JVMTI_ERROR_NONE; | |
2449 } /* end GetClassLoader */ | |
2450 | |
2451 | |
2452 // k_mirror - may be primitive, this must be checked | |
2453 // source_debug_extension_ptr - pre-checked for NULL | |
2454 jvmtiError | |
2455 JvmtiEnv::GetSourceDebugExtension(oop k_mirror, char** source_debug_extension_ptr) { | |
2456 { | |
2457 if (java_lang_Class::is_primitive(k_mirror)) { | |
2458 return JVMTI_ERROR_ABSENT_INFORMATION; | |
2459 } | |
2460 klassOop k = java_lang_Class::as_klassOop(k_mirror); | |
2461 NULL_CHECK(k, JVMTI_ERROR_INVALID_CLASS); | |
2462 if (!Klass::cast(k)->oop_is_instance()) { | |
2463 return JVMTI_ERROR_ABSENT_INFORMATION; | |
2464 } | |
2465 symbolOop sdeOop = instanceKlass::cast(k)->source_debug_extension(); | |
2466 NULL_CHECK(sdeOop, JVMTI_ERROR_ABSENT_INFORMATION); | |
2467 | |
2468 { | |
2469 JavaThread* current_thread = JavaThread::current(); | |
2470 ResourceMark rm(current_thread); | |
2471 const char* sdecp = (const char*) sdeOop->as_C_string(); | |
2472 *source_debug_extension_ptr = (char *) jvmtiMalloc(strlen(sdecp)+1); | |
2473 strcpy(*source_debug_extension_ptr, sdecp); | |
2474 } | |
2475 } | |
2476 | |
2477 return JVMTI_ERROR_NONE; | |
2478 } /* end GetSourceDebugExtension */ | |
2479 | |
2480 // | |
2481 // Object functions | |
2482 // | |
2483 | |
2484 // hash_code_ptr - pre-checked for NULL | |
2485 jvmtiError | |
2486 JvmtiEnv::GetObjectHashCode(jobject object, jint* hash_code_ptr) { | |
2487 oop mirror = JNIHandles::resolve_external_guard(object); | |
2488 NULL_CHECK(mirror, JVMTI_ERROR_INVALID_OBJECT); | |
2489 NULL_CHECK(hash_code_ptr, JVMTI_ERROR_NULL_POINTER); | |
2490 | |
2491 { | |
2492 jint result = (jint) mirror->identity_hash(); | |
2493 *hash_code_ptr = result; | |
2494 } | |
2495 return JVMTI_ERROR_NONE; | |
2496 } /* end GetObjectHashCode */ | |
2497 | |
2498 | |
2499 // info_ptr - pre-checked for NULL | |
2500 jvmtiError | |
2501 JvmtiEnv::GetObjectMonitorUsage(jobject object, jvmtiMonitorUsage* info_ptr) { | |
2502 JavaThread* calling_thread = JavaThread::current(); | |
2503 jvmtiError err = get_object_monitor_usage(calling_thread, object, info_ptr); | |
2504 if (err == JVMTI_ERROR_THREAD_NOT_SUSPENDED) { | |
2505 // Some of the critical threads were not suspended. go to a safepoint and try again | |
2506 VM_GetObjectMonitorUsage op(this, calling_thread, object, info_ptr); | |
2507 VMThread::execute(&op); | |
2508 err = op.result(); | |
2509 } | |
2510 return err; | |
2511 } /* end GetObjectMonitorUsage */ | |
2512 | |
2513 | |
2514 // | |
2515 // Field functions | |
2516 // | |
2517 | |
2518 // name_ptr - NULL is a valid value, must be checked | |
2519 // signature_ptr - NULL is a valid value, must be checked | |
2520 // generic_ptr - NULL is a valid value, must be checked | |
2521 jvmtiError | |
2522 JvmtiEnv::GetFieldName(fieldDescriptor* fdesc_ptr, char** name_ptr, char** signature_ptr, char** generic_ptr) { | |
2523 JavaThread* current_thread = JavaThread::current(); | |
2524 ResourceMark rm(current_thread); | |
2525 if (name_ptr == NULL) { | |
2526 // just don't return the name | |
2527 } else { | |
2528 const char* fieldName = fdesc_ptr->name()->as_C_string(); | |
2529 *name_ptr = (char*) jvmtiMalloc(strlen(fieldName) + 1); | |
2530 if (*name_ptr == NULL) | |
2531 return JVMTI_ERROR_OUT_OF_MEMORY; | |
2532 strcpy(*name_ptr, fieldName); | |
2533 } | |
2534 if (signature_ptr== NULL) { | |
2535 // just don't return the signature | |
2536 } else { | |
2537 const char* fieldSignature = fdesc_ptr->signature()->as_C_string(); | |
2538 *signature_ptr = (char*) jvmtiMalloc(strlen(fieldSignature) + 1); | |
2539 if (*signature_ptr == NULL) | |
2540 return JVMTI_ERROR_OUT_OF_MEMORY; | |
2541 strcpy(*signature_ptr, fieldSignature); | |
2542 } | |
2543 if (generic_ptr != NULL) { | |
2544 *generic_ptr = NULL; | |
2545 symbolOop soop = fdesc_ptr->generic_signature(); | |
2546 if (soop != NULL) { | |
2547 const char* gen_sig = soop->as_C_string(); | |
2548 if (gen_sig != NULL) { | |
2549 jvmtiError err = allocate(strlen(gen_sig) + 1, (unsigned char **)generic_ptr); | |
2550 if (err != JVMTI_ERROR_NONE) { | |
2551 return err; | |
2552 } | |
2553 strcpy(*generic_ptr, gen_sig); | |
2554 } | |
2555 } | |
2556 } | |
2557 return JVMTI_ERROR_NONE; | |
2558 } /* end GetFieldName */ | |
2559 | |
2560 | |
2561 // declaring_class_ptr - pre-checked for NULL | |
2562 jvmtiError | |
2563 JvmtiEnv::GetFieldDeclaringClass(fieldDescriptor* fdesc_ptr, jclass* declaring_class_ptr) { | |
2564 | |
2565 *declaring_class_ptr = get_jni_class_non_null(fdesc_ptr->field_holder()); | |
2566 return JVMTI_ERROR_NONE; | |
2567 } /* end GetFieldDeclaringClass */ | |
2568 | |
2569 | |
2570 // modifiers_ptr - pre-checked for NULL | |
2571 jvmtiError | |
2572 JvmtiEnv::GetFieldModifiers(fieldDescriptor* fdesc_ptr, jint* modifiers_ptr) { | |
2573 | |
2574 AccessFlags resultFlags = fdesc_ptr->access_flags(); | |
2575 jint result = resultFlags.as_int(); | |
2576 *modifiers_ptr = result; | |
2577 | |
2578 return JVMTI_ERROR_NONE; | |
2579 } /* end GetFieldModifiers */ | |
2580 | |
2581 | |
2582 // is_synthetic_ptr - pre-checked for NULL | |
2583 jvmtiError | |
2584 JvmtiEnv::IsFieldSynthetic(fieldDescriptor* fdesc_ptr, jboolean* is_synthetic_ptr) { | |
2585 *is_synthetic_ptr = fdesc_ptr->is_synthetic(); | |
2586 return JVMTI_ERROR_NONE; | |
2587 } /* end IsFieldSynthetic */ | |
2588 | |
2589 | |
2590 // | |
2591 // Method functions | |
2592 // | |
2593 | |
2594 // method_oop - pre-checked for validity, but may be NULL meaning obsolete method | |
2595 // name_ptr - NULL is a valid value, must be checked | |
2596 // signature_ptr - NULL is a valid value, must be checked | |
2597 // generic_ptr - NULL is a valid value, must be checked | |
2598 jvmtiError | |
2599 JvmtiEnv::GetMethodName(methodOop method_oop, char** name_ptr, char** signature_ptr, char** generic_ptr) { | |
2600 NULL_CHECK(method_oop, JVMTI_ERROR_INVALID_METHODID); | |
2601 JavaThread* current_thread = JavaThread::current(); | |
2602 | |
2603 ResourceMark rm(current_thread); // get the utf8 name and signature | |
2604 if (name_ptr == NULL) { | |
2605 // just don't return the name | |
2606 } else { | |
2607 const char* utf8_name = (const char *) method_oop->name()->as_utf8(); | |
2608 *name_ptr = (char *) jvmtiMalloc(strlen(utf8_name)+1); | |
2609 strcpy(*name_ptr, utf8_name); | |
2610 } | |
2611 if (signature_ptr == NULL) { | |
2612 // just don't return the signature | |
2613 } else { | |
2614 const char* utf8_signature = (const char *) method_oop->signature()->as_utf8(); | |
2615 *signature_ptr = (char *) jvmtiMalloc(strlen(utf8_signature) + 1); | |
2616 strcpy(*signature_ptr, utf8_signature); | |
2617 } | |
2618 | |
2619 if (generic_ptr != NULL) { | |
2620 *generic_ptr = NULL; | |
2621 symbolOop soop = method_oop->generic_signature(); | |
2622 if (soop != NULL) { | |
2623 const char* gen_sig = soop->as_C_string(); | |
2624 if (gen_sig != NULL) { | |
2625 jvmtiError err = allocate(strlen(gen_sig) + 1, (unsigned char **)generic_ptr); | |
2626 if (err != JVMTI_ERROR_NONE) { | |
2627 return err; | |
2628 } | |
2629 strcpy(*generic_ptr, gen_sig); | |
2630 } | |
2631 } | |
2632 } | |
2633 return JVMTI_ERROR_NONE; | |
2634 } /* end GetMethodName */ | |
2635 | |
2636 | |
2637 // method_oop - pre-checked for validity, but may be NULL meaning obsolete method | |
2638 // declaring_class_ptr - pre-checked for NULL | |
2639 jvmtiError | |
2640 JvmtiEnv::GetMethodDeclaringClass(methodOop method_oop, jclass* declaring_class_ptr) { | |
2641 NULL_CHECK(method_oop, JVMTI_ERROR_INVALID_METHODID); | |
2642 (*declaring_class_ptr) = get_jni_class_non_null(method_oop->method_holder()); | |
2643 return JVMTI_ERROR_NONE; | |
2644 } /* end GetMethodDeclaringClass */ | |
2645 | |
2646 | |
2647 // method_oop - pre-checked for validity, but may be NULL meaning obsolete method | |
2648 // modifiers_ptr - pre-checked for NULL | |
2649 jvmtiError | |
2650 JvmtiEnv::GetMethodModifiers(methodOop method_oop, jint* modifiers_ptr) { | |
2651 NULL_CHECK(method_oop, JVMTI_ERROR_INVALID_METHODID); | |
2652 (*modifiers_ptr) = method_oop->access_flags().as_int() & JVM_RECOGNIZED_METHOD_MODIFIERS; | |
2653 return JVMTI_ERROR_NONE; | |
2654 } /* end GetMethodModifiers */ | |
2655 | |
2656 | |
2657 // method_oop - pre-checked for validity, but may be NULL meaning obsolete method | |
2658 // max_ptr - pre-checked for NULL | |
2659 jvmtiError | |
2660 JvmtiEnv::GetMaxLocals(methodOop method_oop, jint* max_ptr) { | |
2661 NULL_CHECK(method_oop, JVMTI_ERROR_INVALID_METHODID); | |
2662 // get max stack | |
2663 (*max_ptr) = method_oop->max_locals(); | |
2664 return JVMTI_ERROR_NONE; | |
2665 } /* end GetMaxLocals */ | |
2666 | |
2667 | |
2668 // method_oop - pre-checked for validity, but may be NULL meaning obsolete method | |
2669 // size_ptr - pre-checked for NULL | |
2670 jvmtiError | |
2671 JvmtiEnv::GetArgumentsSize(methodOop method_oop, jint* size_ptr) { | |
2672 NULL_CHECK(method_oop, JVMTI_ERROR_INVALID_METHODID); | |
2673 // get size of arguments | |
2674 | |
2675 (*size_ptr) = method_oop->size_of_parameters(); | |
2676 return JVMTI_ERROR_NONE; | |
2677 } /* end GetArgumentsSize */ | |
2678 | |
2679 | |
2680 // method_oop - pre-checked for validity, but may be NULL meaning obsolete method | |
2681 // entry_count_ptr - pre-checked for NULL | |
2682 // table_ptr - pre-checked for NULL | |
2683 jvmtiError | |
2684 JvmtiEnv::GetLineNumberTable(methodOop method_oop, jint* entry_count_ptr, jvmtiLineNumberEntry** table_ptr) { | |
2685 NULL_CHECK(method_oop, JVMTI_ERROR_INVALID_METHODID); | |
2686 if (!method_oop->has_linenumber_table()) { | |
2687 return (JVMTI_ERROR_ABSENT_INFORMATION); | |
2688 } | |
2689 | |
2690 // The line number table is compressed so we don't know how big it is until decompressed. | |
2691 // Decompression is really fast so we just do it twice. | |
2692 | |
2693 // Compute size of table | |
2694 jint num_entries = 0; | |
2695 CompressedLineNumberReadStream stream(method_oop->compressed_linenumber_table()); | |
2696 while (stream.read_pair()) { | |
2697 num_entries++; | |
2698 } | |
2699 jvmtiLineNumberEntry *jvmti_table = | |
2700 (jvmtiLineNumberEntry *)jvmtiMalloc(num_entries * (sizeof(jvmtiLineNumberEntry))); | |
2701 | |
2702 // Fill jvmti table | |
2703 if (num_entries > 0) { | |
2704 int index = 0; | |
2705 CompressedLineNumberReadStream stream(method_oop->compressed_linenumber_table()); | |
2706 while (stream.read_pair()) { | |
2707 jvmti_table[index].start_location = (jlocation) stream.bci(); | |
2708 jvmti_table[index].line_number = (jint) stream.line(); | |
2709 index++; | |
2710 } | |
2711 assert(index == num_entries, "sanity check"); | |
2712 } | |
2713 | |
2714 // Set up results | |
2715 (*entry_count_ptr) = num_entries; | |
2716 (*table_ptr) = jvmti_table; | |
2717 | |
2718 return JVMTI_ERROR_NONE; | |
2719 } /* end GetLineNumberTable */ | |
2720 | |
2721 | |
2722 // method_oop - pre-checked for validity, but may be NULL meaning obsolete method | |
2723 // start_location_ptr - pre-checked for NULL | |
2724 // end_location_ptr - pre-checked for NULL | |
2725 jvmtiError | |
2726 JvmtiEnv::GetMethodLocation(methodOop method_oop, jlocation* start_location_ptr, jlocation* end_location_ptr) { | |
2727 | |
2728 NULL_CHECK(method_oop, JVMTI_ERROR_INVALID_METHODID); | |
2729 // get start and end location | |
2730 (*end_location_ptr) = (jlocation) (method_oop->code_size() - 1); | |
2731 if (method_oop->code_size() == 0) { | |
2732 // there is no code so there is no start location | |
2733 (*start_location_ptr) = (jlocation)(-1); | |
2734 } else { | |
2735 (*start_location_ptr) = (jlocation)(0); | |
2736 } | |
2737 | |
2738 return JVMTI_ERROR_NONE; | |
2739 } /* end GetMethodLocation */ | |
2740 | |
2741 | |
2742 // method_oop - pre-checked for validity, but may be NULL meaning obsolete method | |
2743 // entry_count_ptr - pre-checked for NULL | |
2744 // table_ptr - pre-checked for NULL | |
2745 jvmtiError | |
2746 JvmtiEnv::GetLocalVariableTable(methodOop method_oop, jint* entry_count_ptr, jvmtiLocalVariableEntry** table_ptr) { | |
2747 | |
2748 NULL_CHECK(method_oop, JVMTI_ERROR_INVALID_METHODID); | |
2749 JavaThread* current_thread = JavaThread::current(); | |
2750 | |
2751 // does the klass have any local variable information? | |
2752 instanceKlass* ik = instanceKlass::cast(method_oop->method_holder()); | |
2753 if (!ik->access_flags().has_localvariable_table()) { | |
2754 return (JVMTI_ERROR_ABSENT_INFORMATION); | |
2755 } | |
2756 | |
2757 constantPoolOop constants = method_oop->constants(); | |
2758 NULL_CHECK(constants, JVMTI_ERROR_ABSENT_INFORMATION); | |
2759 | |
2760 // in the vm localvariable table representation, 6 consecutive elements in the table | |
2761 // represent a 6-tuple of shorts | |
2762 // [start_pc, length, name_index, descriptor_index, signature_index, index] | |
2763 jint num_entries = method_oop->localvariable_table_length(); | |
2764 jvmtiLocalVariableEntry *jvmti_table = (jvmtiLocalVariableEntry *) | |
2765 jvmtiMalloc(num_entries * (sizeof(jvmtiLocalVariableEntry))); | |
2766 | |
2767 if (num_entries > 0) { | |
2768 LocalVariableTableElement* table = method_oop->localvariable_table_start(); | |
2769 for (int i = 0; i < num_entries; i++) { | |
2770 // get the 5 tuple information from the vm table | |
2771 jlocation start_location = (jlocation) table[i].start_bci; | |
2772 jint length = (jint) table[i].length; | |
2773 int name_index = (int) table[i].name_cp_index; | |
2774 int signature_index = (int) table[i].descriptor_cp_index; | |
2775 int generic_signature_index = (int) table[i].signature_cp_index; | |
2776 jint slot = (jint) table[i].slot; | |
2777 | |
2778 // get utf8 name and signature | |
2779 char *name_buf = NULL; | |
2780 char *sig_buf = NULL; | |
2781 char *gen_sig_buf = NULL; | |
2782 { | |
2783 ResourceMark rm(current_thread); | |
2784 | |
2785 const char *utf8_name = (const char *) constants->symbol_at(name_index)->as_utf8(); | |
2786 name_buf = (char *) jvmtiMalloc(strlen(utf8_name)+1); | |
2787 strcpy(name_buf, utf8_name); | |
2788 | |
2789 const char *utf8_signature = (const char *) constants->symbol_at(signature_index)->as_utf8(); | |
2790 sig_buf = (char *) jvmtiMalloc(strlen(utf8_signature)+1); | |
2791 strcpy(sig_buf, utf8_signature); | |
2792 | |
2793 if (generic_signature_index > 0) { | |
2794 const char *utf8_gen_sign = (const char *) | |
2795 constants->symbol_at(generic_signature_index)->as_utf8(); | |
2796 gen_sig_buf = (char *) jvmtiMalloc(strlen(utf8_gen_sign)+1); | |
2797 strcpy(gen_sig_buf, utf8_gen_sign); | |
2798 } | |
2799 } | |
2800 | |
2801 // fill in the jvmti local variable table | |
2802 jvmti_table[i].start_location = start_location; | |
2803 jvmti_table[i].length = length; | |
2804 jvmti_table[i].name = name_buf; | |
2805 jvmti_table[i].signature = sig_buf; | |
2806 jvmti_table[i].generic_signature = gen_sig_buf; | |
2807 jvmti_table[i].slot = slot; | |
2808 } | |
2809 } | |
2810 | |
2811 // set results | |
2812 (*entry_count_ptr) = num_entries; | |
2813 (*table_ptr) = jvmti_table; | |
2814 | |
2815 return JVMTI_ERROR_NONE; | |
2816 } /* end GetLocalVariableTable */ | |
2817 | |
2818 | |
2819 // method_oop - pre-checked for validity, but may be NULL meaning obsolete method | |
2820 // bytecode_count_ptr - pre-checked for NULL | |
2821 // bytecodes_ptr - pre-checked for NULL | |
2822 jvmtiError | |
2823 JvmtiEnv::GetBytecodes(methodOop method_oop, jint* bytecode_count_ptr, unsigned char** bytecodes_ptr) { | |
2824 NULL_CHECK(method_oop, JVMTI_ERROR_INVALID_METHODID); | |
2825 | |
2826 HandleMark hm; | |
2827 methodHandle method(method_oop); | |
2828 jint size = (jint)method->code_size(); | |
2829 jvmtiError err = allocate(size, bytecodes_ptr); | |
2830 if (err != JVMTI_ERROR_NONE) { | |
2831 return err; | |
2832 } | |
2833 | |
2834 (*bytecode_count_ptr) = size; | |
2835 // get byte codes | |
2836 JvmtiClassFileReconstituter::copy_bytecodes(method, *bytecodes_ptr); | |
2837 | |
2838 return JVMTI_ERROR_NONE; | |
2839 } /* end GetBytecodes */ | |
2840 | |
2841 | |
2842 // method_oop - pre-checked for validity, but may be NULL meaning obsolete method | |
2843 // is_native_ptr - pre-checked for NULL | |
2844 jvmtiError | |
2845 JvmtiEnv::IsMethodNative(methodOop method_oop, jboolean* is_native_ptr) { | |
2846 NULL_CHECK(method_oop, JVMTI_ERROR_INVALID_METHODID); | |
2847 (*is_native_ptr) = method_oop->is_native(); | |
2848 return JVMTI_ERROR_NONE; | |
2849 } /* end IsMethodNative */ | |
2850 | |
2851 | |
2852 // method_oop - pre-checked for validity, but may be NULL meaning obsolete method | |
2853 // is_synthetic_ptr - pre-checked for NULL | |
2854 jvmtiError | |
2855 JvmtiEnv::IsMethodSynthetic(methodOop method_oop, jboolean* is_synthetic_ptr) { | |
2856 NULL_CHECK(method_oop, JVMTI_ERROR_INVALID_METHODID); | |
2857 (*is_synthetic_ptr) = method_oop->is_synthetic(); | |
2858 return JVMTI_ERROR_NONE; | |
2859 } /* end IsMethodSynthetic */ | |
2860 | |
2861 | |
2862 // method_oop - pre-checked for validity, but may be NULL meaning obsolete method | |
2863 // is_obsolete_ptr - pre-checked for NULL | |
2864 jvmtiError | |
2865 JvmtiEnv::IsMethodObsolete(methodOop method_oop, jboolean* is_obsolete_ptr) { | |
2866 if (method_oop == NULL || method_oop->is_obsolete()) { | |
2867 *is_obsolete_ptr = true; | |
2868 } else { | |
2869 *is_obsolete_ptr = false; | |
2870 } | |
2871 return JVMTI_ERROR_NONE; | |
2872 } /* end IsMethodObsolete */ | |
2873 | |
2874 // | |
2875 // Raw Monitor functions | |
2876 // | |
2877 | |
2878 // name - pre-checked for NULL | |
2879 // monitor_ptr - pre-checked for NULL | |
2880 jvmtiError | |
2881 JvmtiEnv::CreateRawMonitor(const char* name, jrawMonitorID* monitor_ptr) { | |
2882 JvmtiRawMonitor* rmonitor = new JvmtiRawMonitor(name); | |
2883 NULL_CHECK(rmonitor, JVMTI_ERROR_OUT_OF_MEMORY); | |
2884 | |
2885 *monitor_ptr = (jrawMonitorID)rmonitor; | |
2886 | |
2887 return JVMTI_ERROR_NONE; | |
2888 } /* end CreateRawMonitor */ | |
2889 | |
2890 | |
2891 // rmonitor - pre-checked for validity | |
2892 jvmtiError | |
2893 JvmtiEnv::DestroyRawMonitor(JvmtiRawMonitor * rmonitor) { | |
2894 if (Threads::number_of_threads() == 0) { | |
2895 // Remove this monitor from pending raw monitors list | |
2896 // if it has entered in onload or start phase. | |
2897 JvmtiPendingMonitors::destroy(rmonitor); | |
2898 } else { | |
2899 Thread* thread = Thread::current(); | |
2900 if (rmonitor->is_entered(thread)) { | |
2901 // The caller owns this monitor which we are about to destroy. | |
2902 // We exit the underlying synchronization object so that the | |
2903 // "delete monitor" call below can work without an assertion | |
2904 // failure on systems that don't like destroying synchronization | |
2905 // objects that are locked. | |
2906 int r; | |
2907 intptr_t recursion = rmonitor->recursions(); | |
2908 for (intptr_t i=0; i <= recursion; i++) { | |
2909 r = rmonitor->raw_exit(thread); | |
2910 assert(r == ObjectMonitor::OM_OK, "raw_exit should have worked"); | |
2911 if (r != ObjectMonitor::OM_OK) { // robustness | |
2912 return JVMTI_ERROR_INTERNAL; | |
2913 } | |
2914 } | |
2915 } | |
2916 if (rmonitor->owner() != NULL) { | |
2917 // The caller is trying to destroy a monitor that is locked by | |
2918 // someone else. While this is not forbidden by the JVMTI | |
2919 // spec, it will cause an assertion failure on systems that don't | |
2920 // like destroying synchronization objects that are locked. | |
2921 // We indicate a problem with the error return (and leak the | |
2922 // monitor's memory). | |
2923 return JVMTI_ERROR_NOT_MONITOR_OWNER; | |
2924 } | |
2925 } | |
2926 | |
2927 delete rmonitor; | |
2928 | |
2929 return JVMTI_ERROR_NONE; | |
2930 } /* end DestroyRawMonitor */ | |
2931 | |
2932 | |
2933 // rmonitor - pre-checked for validity | |
2934 jvmtiError | |
2935 JvmtiEnv::RawMonitorEnter(JvmtiRawMonitor * rmonitor) { | |
2936 if (Threads::number_of_threads() == 0) { | |
2937 // No JavaThreads exist so ObjectMonitor enter cannot be | |
2938 // used, add this raw monitor to the pending list. | |
2939 // The pending monitors will be actually entered when | |
2940 // the VM is setup. | |
2941 // See transition_pending_raw_monitors in create_vm() | |
2942 // in thread.cpp. | |
2943 JvmtiPendingMonitors::enter(rmonitor); | |
2944 } else { | |
2945 int r; | |
2946 Thread* thread = Thread::current(); | |
2947 | |
2948 if (thread->is_Java_thread()) { | |
2949 JavaThread* current_thread = (JavaThread*)thread; | |
2950 | |
2951 #ifdef PROPER_TRANSITIONS | |
2952 // Not really unknown but ThreadInVMfromNative does more than we want | |
2953 ThreadInVMfromUnknown __tiv; | |
2954 { | |
2955 ThreadBlockInVM __tbivm(current_thread); | |
2956 r = rmonitor->raw_enter(current_thread); | |
2957 } | |
2958 #else | |
2959 /* Transition to thread_blocked without entering vm state */ | |
2960 /* This is really evil. Normally you can't undo _thread_blocked */ | |
2961 /* transitions like this because it would cause us to miss a */ | |
2962 /* safepoint but since the thread was already in _thread_in_native */ | |
2963 /* the thread is not leaving a safepoint safe state and it will */ | |
2964 /* block when it tries to return from native. We can't safepoint */ | |
2965 /* block in here because we could deadlock the vmthread. Blech. */ | |
2966 | |
2967 JavaThreadState state = current_thread->thread_state(); | |
2968 assert(state == _thread_in_native, "Must be _thread_in_native"); | |
2969 // frame should already be walkable since we are in native | |
2970 assert(!current_thread->has_last_Java_frame() || | |
2971 current_thread->frame_anchor()->walkable(), "Must be walkable"); | |
2972 current_thread->set_thread_state(_thread_blocked); | |
2973 | |
2974 r = rmonitor->raw_enter(current_thread); | |
2975 // restore state, still at a safepoint safe state | |
2976 current_thread->set_thread_state(state); | |
2977 | |
2978 #endif /* PROPER_TRANSITIONS */ | |
2979 assert(r == ObjectMonitor::OM_OK, "raw_enter should have worked"); | |
2980 } else { | |
2981 if (thread->is_VM_thread() || thread->is_ConcurrentGC_thread()) { | |
2982 r = rmonitor->raw_enter(thread); | |
2983 } else { | |
2984 ShouldNotReachHere(); | |
2985 } | |
2986 } | |
2987 | |
2988 if (r != ObjectMonitor::OM_OK) { // robustness | |
2989 return JVMTI_ERROR_INTERNAL; | |
2990 } | |
2991 } | |
2992 return JVMTI_ERROR_NONE; | |
2993 } /* end RawMonitorEnter */ | |
2994 | |
2995 | |
2996 // rmonitor - pre-checked for validity | |
2997 jvmtiError | |
2998 JvmtiEnv::RawMonitorExit(JvmtiRawMonitor * rmonitor) { | |
2999 jvmtiError err = JVMTI_ERROR_NONE; | |
3000 | |
3001 if (Threads::number_of_threads() == 0) { | |
3002 // No JavaThreads exist so just remove this monitor from the pending list. | |
3003 // Bool value from exit is false if rmonitor is not in the list. | |
3004 if (!JvmtiPendingMonitors::exit(rmonitor)) { | |
3005 err = JVMTI_ERROR_NOT_MONITOR_OWNER; | |
3006 } | |
3007 } else { | |
3008 int r; | |
3009 Thread* thread = Thread::current(); | |
3010 | |
3011 if (thread->is_Java_thread()) { | |
3012 JavaThread* current_thread = (JavaThread*)thread; | |
3013 #ifdef PROPER_TRANSITIONS | |
3014 // Not really unknown but ThreadInVMfromNative does more than we want | |
3015 ThreadInVMfromUnknown __tiv; | |
3016 #endif /* PROPER_TRANSITIONS */ | |
3017 r = rmonitor->raw_exit(current_thread); | |
3018 } else { | |
3019 if (thread->is_VM_thread() || thread->is_ConcurrentGC_thread()) { | |
3020 r = rmonitor->raw_exit(thread); | |
3021 } else { | |
3022 ShouldNotReachHere(); | |
3023 } | |
3024 } | |
3025 | |
3026 if (r == ObjectMonitor::OM_ILLEGAL_MONITOR_STATE) { | |
3027 err = JVMTI_ERROR_NOT_MONITOR_OWNER; | |
3028 } else { | |
3029 assert(r == ObjectMonitor::OM_OK, "raw_exit should have worked"); | |
3030 if (r != ObjectMonitor::OM_OK) { // robustness | |
3031 err = JVMTI_ERROR_INTERNAL; | |
3032 } | |
3033 } | |
3034 } | |
3035 return err; | |
3036 } /* end RawMonitorExit */ | |
3037 | |
3038 | |
3039 // rmonitor - pre-checked for validity | |
3040 jvmtiError | |
3041 JvmtiEnv::RawMonitorWait(JvmtiRawMonitor * rmonitor, jlong millis) { | |
3042 int r; | |
3043 Thread* thread = Thread::current(); | |
3044 | |
3045 if (thread->is_Java_thread()) { | |
3046 JavaThread* current_thread = (JavaThread*)thread; | |
3047 #ifdef PROPER_TRANSITIONS | |
3048 // Not really unknown but ThreadInVMfromNative does more than we want | |
3049 ThreadInVMfromUnknown __tiv; | |
3050 { | |
3051 ThreadBlockInVM __tbivm(current_thread); | |
3052 r = rmonitor->raw_wait(millis, true, current_thread); | |
3053 } | |
3054 #else | |
3055 /* Transition to thread_blocked without entering vm state */ | |
3056 /* This is really evil. Normally you can't undo _thread_blocked */ | |
3057 /* transitions like this because it would cause us to miss a */ | |
3058 /* safepoint but since the thread was already in _thread_in_native */ | |
3059 /* the thread is not leaving a safepoint safe state and it will */ | |
3060 /* block when it tries to return from native. We can't safepoint */ | |
3061 /* block in here because we could deadlock the vmthread. Blech. */ | |
3062 | |
3063 JavaThreadState state = current_thread->thread_state(); | |
3064 assert(state == _thread_in_native, "Must be _thread_in_native"); | |
3065 // frame should already be walkable since we are in native | |
3066 assert(!current_thread->has_last_Java_frame() || | |
3067 current_thread->frame_anchor()->walkable(), "Must be walkable"); | |
3068 current_thread->set_thread_state(_thread_blocked); | |
3069 | |
3070 r = rmonitor->raw_wait(millis, true, current_thread); | |
3071 // restore state, still at a safepoint safe state | |
3072 current_thread->set_thread_state(state); | |
3073 | |
3074 #endif /* PROPER_TRANSITIONS */ | |
3075 } else { | |
3076 if (thread->is_VM_thread() || thread->is_ConcurrentGC_thread()) { | |
3077 r = rmonitor->raw_wait(millis, true, thread); | |
3078 } else { | |
3079 ShouldNotReachHere(); | |
3080 } | |
3081 } | |
3082 | |
3083 switch (r) { | |
3084 case ObjectMonitor::OM_INTERRUPTED: | |
3085 return JVMTI_ERROR_INTERRUPT; | |
3086 case ObjectMonitor::OM_ILLEGAL_MONITOR_STATE: | |
3087 return JVMTI_ERROR_NOT_MONITOR_OWNER; | |
3088 } | |
3089 assert(r == ObjectMonitor::OM_OK, "raw_wait should have worked"); | |
3090 if (r != ObjectMonitor::OM_OK) { // robustness | |
3091 return JVMTI_ERROR_INTERNAL; | |
3092 } | |
3093 | |
3094 return JVMTI_ERROR_NONE; | |
3095 } /* end RawMonitorWait */ | |
3096 | |
3097 | |
3098 // rmonitor - pre-checked for validity | |
3099 jvmtiError | |
3100 JvmtiEnv::RawMonitorNotify(JvmtiRawMonitor * rmonitor) { | |
3101 int r; | |
3102 Thread* thread = Thread::current(); | |
3103 | |
3104 if (thread->is_Java_thread()) { | |
3105 JavaThread* current_thread = (JavaThread*)thread; | |
3106 // Not really unknown but ThreadInVMfromNative does more than we want | |
3107 ThreadInVMfromUnknown __tiv; | |
3108 r = rmonitor->raw_notify(current_thread); | |
3109 } else { | |
3110 if (thread->is_VM_thread() || thread->is_ConcurrentGC_thread()) { | |
3111 r = rmonitor->raw_notify(thread); | |
3112 } else { | |
3113 ShouldNotReachHere(); | |
3114 } | |
3115 } | |
3116 | |
3117 if (r == ObjectMonitor::OM_ILLEGAL_MONITOR_STATE) { | |
3118 return JVMTI_ERROR_NOT_MONITOR_OWNER; | |
3119 } | |
3120 assert(r == ObjectMonitor::OM_OK, "raw_notify should have worked"); | |
3121 if (r != ObjectMonitor::OM_OK) { // robustness | |
3122 return JVMTI_ERROR_INTERNAL; | |
3123 } | |
3124 | |
3125 return JVMTI_ERROR_NONE; | |
3126 } /* end RawMonitorNotify */ | |
3127 | |
3128 | |
3129 // rmonitor - pre-checked for validity | |
3130 jvmtiError | |
3131 JvmtiEnv::RawMonitorNotifyAll(JvmtiRawMonitor * rmonitor) { | |
3132 int r; | |
3133 Thread* thread = Thread::current(); | |
3134 | |
3135 if (thread->is_Java_thread()) { | |
3136 JavaThread* current_thread = (JavaThread*)thread; | |
3137 ThreadInVMfromUnknown __tiv; | |
3138 r = rmonitor->raw_notifyAll(current_thread); | |
3139 } else { | |
3140 if (thread->is_VM_thread() || thread->is_ConcurrentGC_thread()) { | |
3141 r = rmonitor->raw_notifyAll(thread); | |
3142 } else { | |
3143 ShouldNotReachHere(); | |
3144 } | |
3145 } | |
3146 | |
3147 if (r == ObjectMonitor::OM_ILLEGAL_MONITOR_STATE) { | |
3148 return JVMTI_ERROR_NOT_MONITOR_OWNER; | |
3149 } | |
3150 assert(r == ObjectMonitor::OM_OK, "raw_notifyAll should have worked"); | |
3151 if (r != ObjectMonitor::OM_OK) { // robustness | |
3152 return JVMTI_ERROR_INTERNAL; | |
3153 } | |
3154 | |
3155 return JVMTI_ERROR_NONE; | |
3156 } /* end RawMonitorNotifyAll */ | |
3157 | |
3158 | |
3159 // | |
3160 // JNI Function Interception functions | |
3161 // | |
3162 | |
3163 | |
3164 // function_table - pre-checked for NULL | |
3165 jvmtiError | |
3166 JvmtiEnv::SetJNIFunctionTable(const jniNativeInterface* function_table) { | |
3167 // Copy jni function table at safepoint. | |
3168 VM_JNIFunctionTableCopier copier(function_table); | |
3169 VMThread::execute(&copier); | |
3170 | |
3171 return JVMTI_ERROR_NONE; | |
3172 } /* end SetJNIFunctionTable */ | |
3173 | |
3174 | |
3175 // function_table - pre-checked for NULL | |
3176 jvmtiError | |
3177 JvmtiEnv::GetJNIFunctionTable(jniNativeInterface** function_table) { | |
3178 *function_table=(jniNativeInterface*)jvmtiMalloc(sizeof(jniNativeInterface)); | |
3179 if (*function_table == NULL) | |
3180 return JVMTI_ERROR_OUT_OF_MEMORY; | |
3181 memcpy(*function_table,(JavaThread::current())->get_jni_functions(),sizeof(jniNativeInterface)); | |
3182 return JVMTI_ERROR_NONE; | |
3183 } /* end GetJNIFunctionTable */ | |
3184 | |
3185 | |
3186 // | |
3187 // Event Management functions | |
3188 // | |
3189 | |
3190 jvmtiError | |
3191 JvmtiEnv::GenerateEvents(jvmtiEvent event_type) { | |
3192 // can only generate two event types | |
3193 if (event_type != JVMTI_EVENT_COMPILED_METHOD_LOAD && | |
3194 event_type != JVMTI_EVENT_DYNAMIC_CODE_GENERATED) { | |
3195 return JVMTI_ERROR_ILLEGAL_ARGUMENT; | |
3196 } | |
3197 | |
3198 // for compiled_method_load events we must check that the environment | |
3199 // has the can_generate_compiled_method_load_events capability. | |
3200 if (event_type == JVMTI_EVENT_COMPILED_METHOD_LOAD) { | |
3201 if (get_capabilities()->can_generate_compiled_method_load_events == 0) { | |
3202 return JVMTI_ERROR_MUST_POSSESS_CAPABILITY; | |
3203 } | |
3204 return JvmtiCodeBlobEvents::generate_compiled_method_load_events(this); | |
3205 } else { | |
3206 return JvmtiCodeBlobEvents::generate_dynamic_code_events(this); | |
3207 } | |
3208 | |
3209 } /* end GenerateEvents */ | |
3210 | |
3211 | |
3212 // | |
3213 // Extension Mechanism functions | |
3214 // | |
3215 | |
3216 // extension_count_ptr - pre-checked for NULL | |
3217 // extensions - pre-checked for NULL | |
3218 jvmtiError | |
3219 JvmtiEnv::GetExtensionFunctions(jint* extension_count_ptr, jvmtiExtensionFunctionInfo** extensions) { | |
3220 return JvmtiExtensions::get_functions(this, extension_count_ptr, extensions); | |
3221 } /* end GetExtensionFunctions */ | |
3222 | |
3223 | |
3224 // extension_count_ptr - pre-checked for NULL | |
3225 // extensions - pre-checked for NULL | |
3226 jvmtiError | |
3227 JvmtiEnv::GetExtensionEvents(jint* extension_count_ptr, jvmtiExtensionEventInfo** extensions) { | |
3228 return JvmtiExtensions::get_events(this, extension_count_ptr, extensions); | |
3229 } /* end GetExtensionEvents */ | |
3230 | |
3231 | |
3232 // callback - NULL is a valid value, must be checked | |
3233 jvmtiError | |
3234 JvmtiEnv::SetExtensionEventCallback(jint extension_event_index, jvmtiExtensionEvent callback) { | |
3235 return JvmtiExtensions::set_event_callback(this, extension_event_index, callback); | |
3236 } /* end SetExtensionEventCallback */ | |
3237 | |
3238 // | |
3239 // Timers functions | |
3240 // | |
3241 | |
3242 // info_ptr - pre-checked for NULL | |
3243 jvmtiError | |
3244 JvmtiEnv::GetCurrentThreadCpuTimerInfo(jvmtiTimerInfo* info_ptr) { | |
3245 os::current_thread_cpu_time_info(info_ptr); | |
3246 return JVMTI_ERROR_NONE; | |
3247 } /* end GetCurrentThreadCpuTimerInfo */ | |
3248 | |
3249 | |
3250 // nanos_ptr - pre-checked for NULL | |
3251 jvmtiError | |
3252 JvmtiEnv::GetCurrentThreadCpuTime(jlong* nanos_ptr) { | |
3253 *nanos_ptr = os::current_thread_cpu_time(); | |
3254 return JVMTI_ERROR_NONE; | |
3255 } /* end GetCurrentThreadCpuTime */ | |
3256 | |
3257 | |
3258 // info_ptr - pre-checked for NULL | |
3259 jvmtiError | |
3260 JvmtiEnv::GetThreadCpuTimerInfo(jvmtiTimerInfo* info_ptr) { | |
3261 os::thread_cpu_time_info(info_ptr); | |
3262 return JVMTI_ERROR_NONE; | |
3263 } /* end GetThreadCpuTimerInfo */ | |
3264 | |
3265 | |
3266 // Threads_lock NOT held, java_thread not protected by lock | |
3267 // java_thread - pre-checked | |
3268 // nanos_ptr - pre-checked for NULL | |
3269 jvmtiError | |
3270 JvmtiEnv::GetThreadCpuTime(JavaThread* java_thread, jlong* nanos_ptr) { | |
3271 *nanos_ptr = os::thread_cpu_time(java_thread); | |
3272 return JVMTI_ERROR_NONE; | |
3273 } /* end GetThreadCpuTime */ | |
3274 | |
3275 | |
3276 // info_ptr - pre-checked for NULL | |
3277 jvmtiError | |
3278 JvmtiEnv::GetTimerInfo(jvmtiTimerInfo* info_ptr) { | |
3279 os::javaTimeNanos_info(info_ptr); | |
3280 return JVMTI_ERROR_NONE; | |
3281 } /* end GetTimerInfo */ | |
3282 | |
3283 | |
3284 // nanos_ptr - pre-checked for NULL | |
3285 jvmtiError | |
3286 JvmtiEnv::GetTime(jlong* nanos_ptr) { | |
3287 *nanos_ptr = os::javaTimeNanos(); | |
3288 return JVMTI_ERROR_NONE; | |
3289 } /* end GetTime */ | |
3290 | |
3291 | |
3292 // processor_count_ptr - pre-checked for NULL | |
3293 jvmtiError | |
3294 JvmtiEnv::GetAvailableProcessors(jint* processor_count_ptr) { | |
3295 *processor_count_ptr = os::active_processor_count(); | |
3296 return JVMTI_ERROR_NONE; | |
3297 } /* end GetAvailableProcessors */ | |
3298 | |
3299 // | |
3300 // System Properties functions | |
3301 // | |
3302 | |
3303 // count_ptr - pre-checked for NULL | |
3304 // property_ptr - pre-checked for NULL | |
3305 jvmtiError | |
3306 JvmtiEnv::GetSystemProperties(jint* count_ptr, char*** property_ptr) { | |
3307 jvmtiError err = JVMTI_ERROR_NONE; | |
3308 | |
3309 *count_ptr = Arguments::PropertyList_count(Arguments::system_properties()); | |
3310 | |
3311 err = allocate(*count_ptr * sizeof(char *), (unsigned char **)property_ptr); | |
3312 if (err != JVMTI_ERROR_NONE) { | |
3313 return err; | |
3314 } | |
3315 int i = 0 ; | |
3316 for (SystemProperty* p = Arguments::system_properties(); p != NULL && i < *count_ptr; p = p->next(), i++) { | |
3317 const char *key = p->key(); | |
3318 char **tmp_value = *property_ptr+i; | |
3319 err = allocate((strlen(key)+1) * sizeof(char), (unsigned char**)tmp_value); | |
3320 if (err == JVMTI_ERROR_NONE) { | |
3321 strcpy(*tmp_value, key); | |
3322 } else { | |
3323 // clean up previously allocated memory. | |
3324 for (int j=0; j<i; j++) { | |
3325 Deallocate((unsigned char*)*property_ptr+j); | |
3326 } | |
3327 Deallocate((unsigned char*)property_ptr); | |
3328 break; | |
3329 } | |
3330 } | |
3331 return err; | |
3332 } /* end GetSystemProperties */ | |
3333 | |
3334 | |
3335 // property - pre-checked for NULL | |
3336 // value_ptr - pre-checked for NULL | |
3337 jvmtiError | |
3338 JvmtiEnv::GetSystemProperty(const char* property, char** value_ptr) { | |
3339 jvmtiError err = JVMTI_ERROR_NONE; | |
3340 const char *value; | |
3341 | |
3342 value = Arguments::PropertyList_get_value(Arguments::system_properties(), property); | |
3343 if (value == NULL) { | |
3344 err = JVMTI_ERROR_NOT_AVAILABLE; | |
3345 } else { | |
3346 err = allocate((strlen(value)+1) * sizeof(char), (unsigned char **)value_ptr); | |
3347 if (err == JVMTI_ERROR_NONE) { | |
3348 strcpy(*value_ptr, value); | |
3349 } | |
3350 } | |
3351 return err; | |
3352 } /* end GetSystemProperty */ | |
3353 | |
3354 | |
3355 // property - pre-checked for NULL | |
3356 // value - NULL is a valid value, must be checked | |
3357 jvmtiError | |
3358 JvmtiEnv::SetSystemProperty(const char* property, const char* value) { | |
3359 jvmtiError err =JVMTI_ERROR_NOT_AVAILABLE; | |
3360 | |
3361 for (SystemProperty* p = Arguments::system_properties(); p != NULL; p = p->next()) { | |
3362 if (strcmp(property, p->key()) == 0) { | |
3363 if (p->set_value((char *)value)) { | |
3364 err = JVMTI_ERROR_NONE; | |
3365 } | |
3366 } | |
3367 } | |
3368 return err; | |
3369 } /* end SetSystemProperty */ | |
3370 | |
3371 #endif // !JVMTI_KERNEL |