Mercurial > hg > truffle
annotate src/share/vm/prims/jvmtiImpl.cpp @ 11722:ff05c78a7f64
use time passed to decide what methods to compile or inline
author | Christian Wirth <christian.wirth@oracle.com> |
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date | Thu, 19 Sep 2013 10:36:56 +0200 |
parents | 836a62f43af9 |
children | cefad50507d8 |
rev | line source |
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0 | 1 /* |
7951 | 2 * Copyright (c) 2003, 2013, Oracle and/or its affiliates. All rights reserved. |
0 | 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
4 * | |
5 * This code is free software; you can redistribute it and/or modify it | |
6 * under the terms of the GNU General Public License version 2 only, as | |
7 * published by the Free Software Foundation. | |
8 * | |
9 * This code is distributed in the hope that it will be useful, but WITHOUT | |
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
12 * version 2 for more details (a copy is included in the LICENSE file that | |
13 * accompanied this code). | |
14 * | |
15 * You should have received a copy of the GNU General Public License version | |
16 * 2 along with this work; if not, write to the Free Software Foundation, | |
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. | |
18 * | |
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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20 * or visit www.oracle.com if you need additional information or have any |
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21 * questions. |
0 | 22 * |
23 */ | |
24 | |
1972 | 25 #include "precompiled.hpp" |
26 #include "classfile/systemDictionary.hpp" | |
27 #include "interpreter/interpreter.hpp" | |
28 #include "jvmtifiles/jvmtiEnv.hpp" | |
29 #include "memory/resourceArea.hpp" | |
30 #include "oops/instanceKlass.hpp" | |
31 #include "prims/jvmtiAgentThread.hpp" | |
32 #include "prims/jvmtiEventController.inline.hpp" | |
33 #include "prims/jvmtiImpl.hpp" | |
34 #include "prims/jvmtiRedefineClasses.hpp" | |
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35 #include "runtime/atomic.hpp" |
1972 | 36 #include "runtime/deoptimization.hpp" |
37 #include "runtime/handles.hpp" | |
38 #include "runtime/handles.inline.hpp" | |
39 #include "runtime/interfaceSupport.hpp" | |
40 #include "runtime/javaCalls.hpp" | |
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41 #include "runtime/os.hpp" |
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42 #include "runtime/serviceThread.hpp" |
1972 | 43 #include "runtime/signature.hpp" |
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44 #include "runtime/thread.inline.hpp" |
1972 | 45 #include "runtime/vframe.hpp" |
46 #include "runtime/vframe_hp.hpp" | |
47 #include "runtime/vm_operations.hpp" | |
48 #include "utilities/exceptions.hpp" | |
0 | 49 |
50 // | |
51 // class JvmtiAgentThread | |
52 // | |
53 // JavaThread used to wrap a thread started by an agent | |
54 // using the JVMTI method RunAgentThread. | |
55 // | |
56 | |
57 JvmtiAgentThread::JvmtiAgentThread(JvmtiEnv* env, jvmtiStartFunction start_fn, const void *start_arg) | |
58 : JavaThread(start_function_wrapper) { | |
59 _env = env; | |
60 _start_fn = start_fn; | |
61 _start_arg = start_arg; | |
62 } | |
63 | |
64 void | |
65 JvmtiAgentThread::start_function_wrapper(JavaThread *thread, TRAPS) { | |
66 // It is expected that any Agent threads will be created as | |
67 // Java Threads. If this is the case, notification of the creation | |
68 // of the thread is given in JavaThread::thread_main(). | |
69 assert(thread->is_Java_thread(), "debugger thread should be a Java Thread"); | |
70 assert(thread == JavaThread::current(), "sanity check"); | |
71 | |
72 JvmtiAgentThread *dthread = (JvmtiAgentThread *)thread; | |
73 dthread->call_start_function(); | |
74 } | |
75 | |
76 void | |
77 JvmtiAgentThread::call_start_function() { | |
78 ThreadToNativeFromVM transition(this); | |
79 _start_fn(_env->jvmti_external(), jni_environment(), (void*)_start_arg); | |
80 } | |
81 | |
82 | |
83 // | |
84 // class GrowableCache - private methods | |
85 // | |
86 | |
87 void GrowableCache::recache() { | |
88 int len = _elements->length(); | |
89 | |
6197 | 90 FREE_C_HEAP_ARRAY(address, _cache, mtInternal); |
91 _cache = NEW_C_HEAP_ARRAY(address,len+1, mtInternal); | |
0 | 92 |
93 for (int i=0; i<len; i++) { | |
94 _cache[i] = _elements->at(i)->getCacheValue(); | |
95 // | |
96 // The cache entry has gone bad. Without a valid frame pointer | |
97 // value, the entry is useless so we simply delete it in product | |
98 // mode. The call to remove() will rebuild the cache again | |
99 // without the bad entry. | |
100 // | |
101 if (_cache[i] == NULL) { | |
102 assert(false, "cannot recache NULL elements"); | |
103 remove(i); | |
104 return; | |
105 } | |
106 } | |
107 _cache[len] = NULL; | |
108 | |
109 _listener_fun(_this_obj,_cache); | |
110 } | |
111 | |
112 bool GrowableCache::equals(void* v, GrowableElement *e2) { | |
113 GrowableElement *e1 = (GrowableElement *) v; | |
114 assert(e1 != NULL, "e1 != NULL"); | |
115 assert(e2 != NULL, "e2 != NULL"); | |
116 | |
117 return e1->equals(e2); | |
118 } | |
119 | |
120 // | |
121 // class GrowableCache - public methods | |
122 // | |
123 | |
124 GrowableCache::GrowableCache() { | |
125 _this_obj = NULL; | |
126 _listener_fun = NULL; | |
127 _elements = NULL; | |
128 _cache = NULL; | |
129 } | |
130 | |
131 GrowableCache::~GrowableCache() { | |
132 clear(); | |
133 delete _elements; | |
6197 | 134 FREE_C_HEAP_ARRAY(address, _cache, mtInternal); |
0 | 135 } |
136 | |
137 void GrowableCache::initialize(void *this_obj, void listener_fun(void *, address*) ) { | |
138 _this_obj = this_obj; | |
139 _listener_fun = listener_fun; | |
6197 | 140 _elements = new (ResourceObj::C_HEAP, mtInternal) GrowableArray<GrowableElement*>(5,true); |
0 | 141 recache(); |
142 } | |
143 | |
144 // number of elements in the collection | |
145 int GrowableCache::length() { | |
146 return _elements->length(); | |
147 } | |
148 | |
149 // get the value of the index element in the collection | |
150 GrowableElement* GrowableCache::at(int index) { | |
151 GrowableElement *e = (GrowableElement *) _elements->at(index); | |
152 assert(e != NULL, "e != NULL"); | |
153 return e; | |
154 } | |
155 | |
156 int GrowableCache::find(GrowableElement* e) { | |
157 return _elements->find(e, GrowableCache::equals); | |
158 } | |
159 | |
160 // append a copy of the element to the end of the collection | |
161 void GrowableCache::append(GrowableElement* e) { | |
162 GrowableElement *new_e = e->clone(); | |
163 _elements->append(new_e); | |
164 recache(); | |
165 } | |
166 | |
167 // insert a copy of the element using lessthan() | |
168 void GrowableCache::insert(GrowableElement* e) { | |
169 GrowableElement *new_e = e->clone(); | |
170 _elements->append(new_e); | |
171 | |
172 int n = length()-2; | |
173 for (int i=n; i>=0; i--) { | |
174 GrowableElement *e1 = _elements->at(i); | |
175 GrowableElement *e2 = _elements->at(i+1); | |
176 if (e2->lessThan(e1)) { | |
177 _elements->at_put(i+1, e1); | |
178 _elements->at_put(i, e2); | |
179 } | |
180 } | |
181 | |
182 recache(); | |
183 } | |
184 | |
185 // remove the element at index | |
186 void GrowableCache::remove (int index) { | |
187 GrowableElement *e = _elements->at(index); | |
188 assert(e != NULL, "e != NULL"); | |
189 _elements->remove(e); | |
190 delete e; | |
191 recache(); | |
192 } | |
193 | |
194 // clear out all elements, release all heap space and | |
195 // let our listener know that things have changed. | |
196 void GrowableCache::clear() { | |
197 int len = _elements->length(); | |
198 for (int i=0; i<len; i++) { | |
199 delete _elements->at(i); | |
200 } | |
201 _elements->clear(); | |
202 recache(); | |
203 } | |
204 | |
205 void GrowableCache::oops_do(OopClosure* f) { | |
206 int len = _elements->length(); | |
207 for (int i=0; i<len; i++) { | |
208 GrowableElement *e = _elements->at(i); | |
209 e->oops_do(f); | |
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210 } |
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211 } |
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212 |
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213 void GrowableCache::gc_epilogue() { |
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214 int len = _elements->length(); |
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215 for (int i=0; i<len; i++) { |
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216 _cache[i] = _elements->at(i)->getCacheValue(); |
0 | 217 } |
218 } | |
219 | |
220 // | |
221 // class JvmtiBreakpoint | |
222 // | |
223 | |
224 JvmtiBreakpoint::JvmtiBreakpoint() { | |
225 _method = NULL; | |
226 _bci = 0; | |
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227 _class_loader = NULL; |
0 | 228 #ifdef CHECK_UNHANDLED_OOPS |
229 // This one is always allocated with new, but check it just in case. | |
230 Thread *thread = Thread::current(); | |
231 if (thread->is_in_stack((address)&_method)) { | |
232 thread->allow_unhandled_oop((oop*)&_method); | |
233 } | |
234 #endif // CHECK_UNHANDLED_OOPS | |
235 } | |
236 | |
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237 JvmtiBreakpoint::JvmtiBreakpoint(Method* m_method, jlocation location) { |
0 | 238 _method = m_method; |
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239 _class_loader = _method->method_holder()->class_loader_data()->class_loader(); |
0 | 240 assert(_method != NULL, "_method != NULL"); |
241 _bci = (int) location; | |
242 assert(_bci >= 0, "_bci >= 0"); | |
243 } | |
244 | |
245 void JvmtiBreakpoint::copy(JvmtiBreakpoint& bp) { | |
246 _method = bp._method; | |
247 _bci = bp._bci; | |
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248 _class_loader = bp._class_loader; |
0 | 249 } |
250 | |
251 bool JvmtiBreakpoint::lessThan(JvmtiBreakpoint& bp) { | |
252 Unimplemented(); | |
253 return false; | |
254 } | |
255 | |
256 bool JvmtiBreakpoint::equals(JvmtiBreakpoint& bp) { | |
257 return _method == bp._method | |
258 && _bci == bp._bci; | |
259 } | |
260 | |
261 bool JvmtiBreakpoint::is_valid() { | |
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262 // class loader can be NULL |
0 | 263 return _method != NULL && |
264 _bci >= 0; | |
265 } | |
266 | |
267 address JvmtiBreakpoint::getBcp() { | |
268 return _method->bcp_from(_bci); | |
269 } | |
270 | |
271 void JvmtiBreakpoint::each_method_version_do(method_action meth_act) { | |
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272 ((Method*)_method->*meth_act)(_bci); |
0 | 273 |
274 // add/remove breakpoint to/from versions of the method that | |
275 // are EMCP. Directly or transitively obsolete methods are | |
276 // not saved in the PreviousVersionInfo. | |
277 Thread *thread = Thread::current(); | |
278 instanceKlassHandle ikh = instanceKlassHandle(thread, _method->method_holder()); | |
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279 Symbol* m_name = _method->name(); |
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280 Symbol* m_signature = _method->signature(); |
0 | 281 |
282 { | |
283 ResourceMark rm(thread); | |
284 // PreviousVersionInfo objects returned via PreviousVersionWalker | |
285 // contain a GrowableArray of handles. We have to clean up the | |
286 // GrowableArray _after_ the PreviousVersionWalker destructor | |
287 // has destroyed the handles. | |
288 { | |
289 // search previous versions if they exist | |
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290 PreviousVersionWalker pvw((InstanceKlass *)ikh()); |
0 | 291 for (PreviousVersionInfo * pv_info = pvw.next_previous_version(); |
292 pv_info != NULL; pv_info = pvw.next_previous_version()) { | |
293 GrowableArray<methodHandle>* methods = | |
294 pv_info->prev_EMCP_method_handles(); | |
295 | |
296 if (methods == NULL) { | |
297 // We have run into a PreviousVersion generation where | |
298 // all methods were made obsolete during that generation's | |
299 // RedefineClasses() operation. At the time of that | |
300 // operation, all EMCP methods were flushed so we don't | |
301 // have to go back any further. | |
302 // | |
303 // A NULL methods array is different than an empty methods | |
304 // array. We cannot infer any optimizations about older | |
305 // generations from an empty methods array for the current | |
306 // generation. | |
307 break; | |
308 } | |
309 | |
310 for (int i = methods->length() - 1; i >= 0; i--) { | |
311 methodHandle method = methods->at(i); | |
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312 // obsolete methods that are running are not deleted from |
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313 // previous version array, but they are skipped here. |
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314 if (!method->is_obsolete() && |
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315 method->name() == m_name && |
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316 method->signature() == m_signature) { |
0 | 317 RC_TRACE(0x00000800, ("%sing breakpoint in %s(%s)", |
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318 meth_act == &Method::set_breakpoint ? "sett" : "clear", |
0 | 319 method->name()->as_C_string(), |
320 method->signature()->as_C_string())); | |
321 | |
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322 ((Method*)method()->*meth_act)(_bci); |
0 | 323 break; |
324 } | |
325 } | |
326 } | |
327 } // pvw is cleaned up | |
328 } // rm is cleaned up | |
329 } | |
330 | |
331 void JvmtiBreakpoint::set() { | |
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332 each_method_version_do(&Method::set_breakpoint); |
0 | 333 } |
334 | |
335 void JvmtiBreakpoint::clear() { | |
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336 each_method_version_do(&Method::clear_breakpoint); |
0 | 337 } |
338 | |
339 void JvmtiBreakpoint::print() { | |
340 #ifndef PRODUCT | |
341 const char *class_name = (_method == NULL) ? "NULL" : _method->klass_name()->as_C_string(); | |
342 const char *method_name = (_method == NULL) ? "NULL" : _method->name()->as_C_string(); | |
343 | |
344 tty->print("Breakpoint(%s,%s,%d,%p)",class_name, method_name, _bci, getBcp()); | |
345 #endif | |
346 } | |
347 | |
348 | |
349 // | |
350 // class VM_ChangeBreakpoints | |
351 // | |
352 // Modify the Breakpoints data structure at a safepoint | |
353 // | |
354 | |
355 void VM_ChangeBreakpoints::doit() { | |
356 switch (_operation) { | |
357 case SET_BREAKPOINT: | |
358 _breakpoints->set_at_safepoint(*_bp); | |
359 break; | |
360 case CLEAR_BREAKPOINT: | |
361 _breakpoints->clear_at_safepoint(*_bp); | |
362 break; | |
363 default: | |
364 assert(false, "Unknown operation"); | |
365 } | |
366 } | |
367 | |
368 void VM_ChangeBreakpoints::oops_do(OopClosure* f) { | |
10405 | 369 // The JvmtiBreakpoints in _breakpoints will be visited via |
370 // JvmtiExport::oops_do. | |
0 | 371 if (_bp != NULL) { |
372 _bp->oops_do(f); | |
373 } | |
374 } | |
375 | |
376 // | |
377 // class JvmtiBreakpoints | |
378 // | |
379 // a JVMTI internal collection of JvmtiBreakpoint | |
380 // | |
381 | |
382 JvmtiBreakpoints::JvmtiBreakpoints(void listener_fun(void *,address *)) { | |
383 _bps.initialize(this,listener_fun); | |
384 } | |
385 | |
386 JvmtiBreakpoints:: ~JvmtiBreakpoints() {} | |
387 | |
388 void JvmtiBreakpoints::oops_do(OopClosure* f) { | |
389 _bps.oops_do(f); | |
390 } | |
391 | |
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392 void JvmtiBreakpoints::gc_epilogue() { |
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393 _bps.gc_epilogue(); |
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394 } |
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395 |
0 | 396 void JvmtiBreakpoints::print() { |
397 #ifndef PRODUCT | |
398 ResourceMark rm; | |
399 | |
400 int n = _bps.length(); | |
401 for (int i=0; i<n; i++) { | |
402 JvmtiBreakpoint& bp = _bps.at(i); | |
403 tty->print("%d: ", i); | |
404 bp.print(); | |
405 tty->print_cr(""); | |
406 } | |
407 #endif | |
408 } | |
409 | |
410 | |
411 void JvmtiBreakpoints::set_at_safepoint(JvmtiBreakpoint& bp) { | |
412 assert(SafepointSynchronize::is_at_safepoint(), "must be at safepoint"); | |
413 | |
414 int i = _bps.find(bp); | |
415 if (i == -1) { | |
416 _bps.append(bp); | |
417 bp.set(); | |
418 } | |
419 } | |
420 | |
421 void JvmtiBreakpoints::clear_at_safepoint(JvmtiBreakpoint& bp) { | |
422 assert(SafepointSynchronize::is_at_safepoint(), "must be at safepoint"); | |
423 | |
424 int i = _bps.find(bp); | |
425 if (i != -1) { | |
426 _bps.remove(i); | |
427 bp.clear(); | |
428 } | |
429 } | |
430 | |
431 int JvmtiBreakpoints::length() { return _bps.length(); } | |
432 | |
433 int JvmtiBreakpoints::set(JvmtiBreakpoint& bp) { | |
434 if ( _bps.find(bp) != -1) { | |
435 return JVMTI_ERROR_DUPLICATE; | |
436 } | |
10405 | 437 VM_ChangeBreakpoints set_breakpoint(VM_ChangeBreakpoints::SET_BREAKPOINT, &bp); |
0 | 438 VMThread::execute(&set_breakpoint); |
439 return JVMTI_ERROR_NONE; | |
440 } | |
441 | |
442 int JvmtiBreakpoints::clear(JvmtiBreakpoint& bp) { | |
443 if ( _bps.find(bp) == -1) { | |
444 return JVMTI_ERROR_NOT_FOUND; | |
445 } | |
446 | |
10405 | 447 VM_ChangeBreakpoints clear_breakpoint(VM_ChangeBreakpoints::CLEAR_BREAKPOINT, &bp); |
0 | 448 VMThread::execute(&clear_breakpoint); |
449 return JVMTI_ERROR_NONE; | |
450 } | |
451 | |
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452 void JvmtiBreakpoints::clearall_in_class_at_safepoint(Klass* klass) { |
0 | 453 bool changed = true; |
454 // We are going to run thru the list of bkpts | |
455 // and delete some. This deletion probably alters | |
456 // the list in some implementation defined way such | |
457 // that when we delete entry i, the next entry might | |
458 // no longer be at i+1. To be safe, each time we delete | |
459 // an entry, we'll just start again from the beginning. | |
460 // We'll stop when we make a pass thru the whole list without | |
461 // deleting anything. | |
462 while (changed) { | |
463 int len = _bps.length(); | |
464 changed = false; | |
465 for (int i = 0; i < len; i++) { | |
466 JvmtiBreakpoint& bp = _bps.at(i); | |
467 if (bp.method()->method_holder() == klass) { | |
468 bp.clear(); | |
469 _bps.remove(i); | |
470 // This changed 'i' so we have to start over. | |
471 changed = true; | |
472 break; | |
473 } | |
474 } | |
475 } | |
476 } | |
477 | |
478 // | |
479 // class JvmtiCurrentBreakpoints | |
480 // | |
481 | |
482 JvmtiBreakpoints *JvmtiCurrentBreakpoints::_jvmti_breakpoints = NULL; | |
483 address * JvmtiCurrentBreakpoints::_breakpoint_list = NULL; | |
484 | |
485 | |
486 JvmtiBreakpoints& JvmtiCurrentBreakpoints::get_jvmti_breakpoints() { | |
487 if (_jvmti_breakpoints != NULL) return (*_jvmti_breakpoints); | |
488 _jvmti_breakpoints = new JvmtiBreakpoints(listener_fun); | |
489 assert(_jvmti_breakpoints != NULL, "_jvmti_breakpoints != NULL"); | |
490 return (*_jvmti_breakpoints); | |
491 } | |
492 | |
493 void JvmtiCurrentBreakpoints::listener_fun(void *this_obj, address *cache) { | |
494 JvmtiBreakpoints *this_jvmti = (JvmtiBreakpoints *) this_obj; | |
495 assert(this_jvmti != NULL, "this_jvmti != NULL"); | |
496 | |
497 debug_only(int n = this_jvmti->length();); | |
498 assert(cache[n] == NULL, "cache must be NULL terminated"); | |
499 | |
500 set_breakpoint_list(cache); | |
501 } | |
502 | |
503 | |
504 void JvmtiCurrentBreakpoints::oops_do(OopClosure* f) { | |
505 if (_jvmti_breakpoints != NULL) { | |
506 _jvmti_breakpoints->oops_do(f); | |
507 } | |
508 } | |
509 | |
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510 void JvmtiCurrentBreakpoints::gc_epilogue() { |
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511 if (_jvmti_breakpoints != NULL) { |
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512 _jvmti_breakpoints->gc_epilogue(); |
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513 } |
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514 } |
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515 |
0 | 516 /////////////////////////////////////////////////////////////// |
517 // | |
518 // class VM_GetOrSetLocal | |
519 // | |
520 | |
521 // Constructor for non-object getter | |
522 VM_GetOrSetLocal::VM_GetOrSetLocal(JavaThread* thread, jint depth, int index, BasicType type) | |
523 : _thread(thread) | |
524 , _calling_thread(NULL) | |
525 , _depth(depth) | |
526 , _index(index) | |
527 , _type(type) | |
528 , _set(false) | |
529 , _jvf(NULL) | |
530 , _result(JVMTI_ERROR_NONE) | |
531 { | |
532 } | |
533 | |
534 // Constructor for object or non-object setter | |
535 VM_GetOrSetLocal::VM_GetOrSetLocal(JavaThread* thread, jint depth, int index, BasicType type, jvalue value) | |
536 : _thread(thread) | |
537 , _calling_thread(NULL) | |
538 , _depth(depth) | |
539 , _index(index) | |
540 , _type(type) | |
541 , _value(value) | |
542 , _set(true) | |
543 , _jvf(NULL) | |
544 , _result(JVMTI_ERROR_NONE) | |
545 { | |
546 } | |
547 | |
548 // Constructor for object getter | |
549 VM_GetOrSetLocal::VM_GetOrSetLocal(JavaThread* thread, JavaThread* calling_thread, jint depth, int index) | |
550 : _thread(thread) | |
551 , _calling_thread(calling_thread) | |
552 , _depth(depth) | |
553 , _index(index) | |
554 , _type(T_OBJECT) | |
555 , _set(false) | |
556 , _jvf(NULL) | |
557 , _result(JVMTI_ERROR_NONE) | |
558 { | |
559 } | |
560 | |
561 vframe *VM_GetOrSetLocal::get_vframe() { | |
562 if (!_thread->has_last_Java_frame()) { | |
563 return NULL; | |
564 } | |
565 RegisterMap reg_map(_thread); | |
566 vframe *vf = _thread->last_java_vframe(®_map); | |
567 int d = 0; | |
568 while ((vf != NULL) && (d < _depth)) { | |
569 vf = vf->java_sender(); | |
570 d++; | |
571 } | |
572 return vf; | |
573 } | |
574 | |
575 javaVFrame *VM_GetOrSetLocal::get_java_vframe() { | |
576 vframe* vf = get_vframe(); | |
577 if (vf == NULL) { | |
578 _result = JVMTI_ERROR_NO_MORE_FRAMES; | |
579 return NULL; | |
580 } | |
581 javaVFrame *jvf = (javaVFrame*)vf; | |
582 | |
2019 | 583 if (!vf->is_java_frame()) { |
0 | 584 _result = JVMTI_ERROR_OPAQUE_FRAME; |
585 return NULL; | |
586 } | |
587 return jvf; | |
588 } | |
589 | |
590 // Check that the klass is assignable to a type with the given signature. | |
591 // Another solution could be to use the function Klass::is_subtype_of(type). | |
592 // But the type class can be forced to load/initialize eagerly in such a case. | |
593 // This may cause unexpected consequences like CFLH or class-init JVMTI events. | |
594 // It is better to avoid such a behavior. | |
595 bool VM_GetOrSetLocal::is_assignable(const char* ty_sign, Klass* klass, Thread* thread) { | |
596 assert(ty_sign != NULL, "type signature must not be NULL"); | |
597 assert(thread != NULL, "thread must not be NULL"); | |
598 assert(klass != NULL, "klass must not be NULL"); | |
599 | |
600 int len = (int) strlen(ty_sign); | |
601 if (ty_sign[0] == 'L' && ty_sign[len-1] == ';') { // Need pure class/interface name | |
602 ty_sign++; | |
603 len -= 2; | |
604 } | |
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605 TempNewSymbol ty_sym = SymbolTable::new_symbol(ty_sign, len, thread); |
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606 if (klass->name() == ty_sym) { |
0 | 607 return true; |
608 } | |
609 // Compare primary supers | |
610 int super_depth = klass->super_depth(); | |
611 int idx; | |
612 for (idx = 0; idx < super_depth; idx++) { | |
6983 | 613 if (klass->primary_super_of_depth(idx)->name() == ty_sym) { |
0 | 614 return true; |
615 } | |
616 } | |
617 // Compare secondary supers | |
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618 Array<Klass*>* sec_supers = klass->secondary_supers(); |
0 | 619 for (idx = 0; idx < sec_supers->length(); idx++) { |
6983 | 620 if (((Klass*) sec_supers->at(idx))->name() == ty_sym) { |
0 | 621 return true; |
622 } | |
623 } | |
624 return false; | |
625 } | |
626 | |
627 // Checks error conditions: | |
628 // JVMTI_ERROR_INVALID_SLOT | |
629 // JVMTI_ERROR_TYPE_MISMATCH | |
630 // Returns: 'true' - everything is Ok, 'false' - error code | |
631 | |
632 bool VM_GetOrSetLocal::check_slot_type(javaVFrame* jvf) { | |
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633 Method* method_oop = jvf->method(); |
0 | 634 if (!method_oop->has_localvariable_table()) { |
635 // Just to check index boundaries | |
636 jint extra_slot = (_type == T_LONG || _type == T_DOUBLE) ? 1 : 0; | |
637 if (_index < 0 || _index + extra_slot >= method_oop->max_locals()) { | |
638 _result = JVMTI_ERROR_INVALID_SLOT; | |
639 return false; | |
640 } | |
641 return true; | |
642 } | |
643 | |
644 jint num_entries = method_oop->localvariable_table_length(); | |
645 if (num_entries == 0) { | |
646 _result = JVMTI_ERROR_INVALID_SLOT; | |
647 return false; // There are no slots | |
648 } | |
649 int signature_idx = -1; | |
650 int vf_bci = jvf->bci(); | |
651 LocalVariableTableElement* table = method_oop->localvariable_table_start(); | |
652 for (int i = 0; i < num_entries; i++) { | |
653 int start_bci = table[i].start_bci; | |
654 int end_bci = start_bci + table[i].length; | |
655 | |
656 // Here we assume that locations of LVT entries | |
657 // with the same slot number cannot be overlapped | |
658 if (_index == (jint) table[i].slot && start_bci <= vf_bci && vf_bci <= end_bci) { | |
659 signature_idx = (int) table[i].descriptor_cp_index; | |
660 break; | |
661 } | |
662 } | |
663 if (signature_idx == -1) { | |
664 _result = JVMTI_ERROR_INVALID_SLOT; | |
665 return false; // Incorrect slot index | |
666 } | |
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667 Symbol* sign_sym = method_oop->constants()->symbol_at(signature_idx); |
0 | 668 const char* signature = (const char *) sign_sym->as_utf8(); |
669 BasicType slot_type = char2type(signature[0]); | |
670 | |
671 switch (slot_type) { | |
672 case T_BYTE: | |
673 case T_SHORT: | |
674 case T_CHAR: | |
675 case T_BOOLEAN: | |
676 slot_type = T_INT; | |
677 break; | |
678 case T_ARRAY: | |
679 slot_type = T_OBJECT; | |
680 break; | |
681 }; | |
682 if (_type != slot_type) { | |
683 _result = JVMTI_ERROR_TYPE_MISMATCH; | |
684 return false; | |
685 } | |
686 | |
687 jobject jobj = _value.l; | |
688 if (_set && slot_type == T_OBJECT && jobj != NULL) { // NULL reference is allowed | |
689 // Check that the jobject class matches the return type signature. | |
690 JavaThread* cur_thread = JavaThread::current(); | |
691 HandleMark hm(cur_thread); | |
692 | |
693 Handle obj = Handle(cur_thread, JNIHandles::resolve_external_guard(jobj)); | |
694 NULL_CHECK(obj, (_result = JVMTI_ERROR_INVALID_OBJECT, false)); | |
695 KlassHandle ob_kh = KlassHandle(cur_thread, obj->klass()); | |
696 NULL_CHECK(ob_kh, (_result = JVMTI_ERROR_INVALID_OBJECT, false)); | |
697 | |
6983 | 698 if (!is_assignable(signature, ob_kh(), cur_thread)) { |
0 | 699 _result = JVMTI_ERROR_TYPE_MISMATCH; |
700 return false; | |
701 } | |
702 } | |
703 return true; | |
704 } | |
705 | |
706 static bool can_be_deoptimized(vframe* vf) { | |
707 return (vf->is_compiled_frame() && vf->fr().can_be_deoptimized()); | |
708 } | |
709 | |
710 bool VM_GetOrSetLocal::doit_prologue() { | |
711 _jvf = get_java_vframe(); | |
712 NULL_CHECK(_jvf, false); | |
713 | |
2019 | 714 if (_jvf->method()->is_native()) { |
715 if (getting_receiver() && !_jvf->method()->is_static()) { | |
716 return true; | |
717 } else { | |
718 _result = JVMTI_ERROR_OPAQUE_FRAME; | |
719 return false; | |
720 } | |
721 } | |
722 | |
0 | 723 if (!check_slot_type(_jvf)) { |
724 return false; | |
725 } | |
726 return true; | |
727 } | |
728 | |
729 void VM_GetOrSetLocal::doit() { | |
730 if (_set) { | |
731 // Force deoptimization of frame if compiled because it's | |
732 // possible the compiler emitted some locals as constant values, | |
733 // meaning they are not mutable. | |
734 if (can_be_deoptimized(_jvf)) { | |
735 | |
736 // Schedule deoptimization so that eventually the local | |
737 // update will be written to an interpreter frame. | |
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738 Deoptimization::deoptimize_frame(_jvf->thread(), _jvf->fr().id(), Deoptimization::Reason_constraint); |
0 | 739 |
740 // Now store a new value for the local which will be applied | |
741 // once deoptimization occurs. Note however that while this | |
742 // write is deferred until deoptimization actually happens | |
743 // can vframe created after this point will have its locals | |
744 // reflecting this update so as far as anyone can see the | |
745 // write has already taken place. | |
746 | |
747 // If we are updating an oop then get the oop from the handle | |
748 // since the handle will be long gone by the time the deopt | |
749 // happens. The oop stored in the deferred local will be | |
750 // gc'd on its own. | |
751 if (_type == T_OBJECT) { | |
752 _value.l = (jobject) (JNIHandles::resolve_external_guard(_value.l)); | |
753 } | |
754 // Re-read the vframe so we can see that it is deoptimized | |
755 // [ Only need because of assert in update_local() ] | |
756 _jvf = get_java_vframe(); | |
757 ((compiledVFrame*)_jvf)->update_local(_type, _index, _value); | |
758 return; | |
759 } | |
760 StackValueCollection *locals = _jvf->locals(); | |
761 HandleMark hm; | |
762 | |
763 switch (_type) { | |
2019 | 764 case T_INT: locals->set_int_at (_index, _value.i); break; |
765 case T_LONG: locals->set_long_at (_index, _value.j); break; | |
766 case T_FLOAT: locals->set_float_at (_index, _value.f); break; | |
767 case T_DOUBLE: locals->set_double_at(_index, _value.d); break; | |
768 case T_OBJECT: { | |
769 Handle ob_h(JNIHandles::resolve_external_guard(_value.l)); | |
770 locals->set_obj_at (_index, ob_h); | |
771 break; | |
772 } | |
773 default: ShouldNotReachHere(); | |
0 | 774 } |
775 _jvf->set_locals(locals); | |
776 } else { | |
2019 | 777 if (_jvf->method()->is_native() && _jvf->is_compiled_frame()) { |
778 assert(getting_receiver(), "Can only get here when getting receiver"); | |
779 oop receiver = _jvf->fr().get_native_receiver(); | |
780 _value.l = JNIHandles::make_local(_calling_thread, receiver); | |
781 } else { | |
782 StackValueCollection *locals = _jvf->locals(); | |
0 | 783 |
2019 | 784 if (locals->at(_index)->type() == T_CONFLICT) { |
785 memset(&_value, 0, sizeof(_value)); | |
786 _value.l = NULL; | |
787 return; | |
788 } | |
0 | 789 |
2019 | 790 switch (_type) { |
791 case T_INT: _value.i = locals->int_at (_index); break; | |
792 case T_LONG: _value.j = locals->long_at (_index); break; | |
793 case T_FLOAT: _value.f = locals->float_at (_index); break; | |
794 case T_DOUBLE: _value.d = locals->double_at(_index); break; | |
795 case T_OBJECT: { | |
796 // Wrap the oop to be returned in a local JNI handle since | |
797 // oops_do() no longer applies after doit() is finished. | |
798 oop obj = locals->obj_at(_index)(); | |
799 _value.l = JNIHandles::make_local(_calling_thread, obj); | |
800 break; | |
801 } | |
802 default: ShouldNotReachHere(); | |
803 } | |
0 | 804 } |
805 } | |
806 } | |
807 | |
808 | |
809 bool VM_GetOrSetLocal::allow_nested_vm_operations() const { | |
810 return true; // May need to deoptimize | |
811 } | |
812 | |
813 | |
2019 | 814 VM_GetReceiver::VM_GetReceiver( |
815 JavaThread* thread, JavaThread* caller_thread, jint depth) | |
816 : VM_GetOrSetLocal(thread, caller_thread, depth, 0) {} | |
817 | |
0 | 818 ///////////////////////////////////////////////////////////////////////////////////////// |
819 | |
820 // | |
821 // class JvmtiSuspendControl - see comments in jvmtiImpl.hpp | |
822 // | |
823 | |
824 bool JvmtiSuspendControl::suspend(JavaThread *java_thread) { | |
825 // external suspend should have caught suspending a thread twice | |
826 | |
827 // Immediate suspension required for JPDA back-end so JVMTI agent threads do | |
828 // not deadlock due to later suspension on transitions while holding | |
829 // raw monitors. Passing true causes the immediate suspension. | |
830 // java_suspend() will catch threads in the process of exiting | |
831 // and will ignore them. | |
832 java_thread->java_suspend(); | |
833 | |
834 // It would be nice to have the following assertion in all the time, | |
835 // but it is possible for a racing resume request to have resumed | |
836 // this thread right after we suspended it. Temporarily enable this | |
837 // assertion if you are chasing a different kind of bug. | |
838 // | |
839 // assert(java_lang_Thread::thread(java_thread->threadObj()) == NULL || | |
840 // java_thread->is_being_ext_suspended(), "thread is not suspended"); | |
841 | |
842 if (java_lang_Thread::thread(java_thread->threadObj()) == NULL) { | |
843 // check again because we can get delayed in java_suspend(): | |
844 // the thread is in process of exiting. | |
845 return false; | |
846 } | |
847 | |
848 return true; | |
849 } | |
850 | |
851 bool JvmtiSuspendControl::resume(JavaThread *java_thread) { | |
852 // external suspend should have caught resuming a thread twice | |
853 assert(java_thread->is_being_ext_suspended(), "thread should be suspended"); | |
854 | |
855 // resume thread | |
856 { | |
857 // must always grab Threads_lock, see JVM_SuspendThread | |
858 MutexLocker ml(Threads_lock); | |
859 java_thread->java_resume(); | |
860 } | |
861 | |
862 return true; | |
863 } | |
864 | |
865 | |
866 void JvmtiSuspendControl::print() { | |
867 #ifndef PRODUCT | |
868 MutexLocker mu(Threads_lock); | |
869 ResourceMark rm; | |
870 | |
871 tty->print("Suspended Threads: ["); | |
872 for (JavaThread *thread = Threads::first(); thread != NULL; thread = thread->next()) { | |
8721 | 873 #ifdef JVMTI_TRACE |
0 | 874 const char *name = JvmtiTrace::safe_get_thread_name(thread); |
875 #else | |
876 const char *name = ""; | |
877 #endif /*JVMTI_TRACE */ | |
878 tty->print("%s(%c ", name, thread->is_being_ext_suspended() ? 'S' : '_'); | |
879 if (!thread->has_last_Java_frame()) { | |
880 tty->print("no stack"); | |
881 } | |
882 tty->print(") "); | |
883 } | |
884 tty->print_cr("]"); | |
885 #endif | |
886 } | |
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887 |
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888 JvmtiDeferredEvent JvmtiDeferredEvent::compiled_method_load_event( |
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889 nmethod* nm) { |
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890 JvmtiDeferredEvent event = JvmtiDeferredEvent(TYPE_COMPILED_METHOD_LOAD); |
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891 event._event_data.compiled_method_load = nm; |
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892 // Keep the nmethod alive until the ServiceThread can process |
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893 // this deferred event. |
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894 nmethodLocker::lock_nmethod(nm); |
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895 return event; |
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896 } |
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897 |
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898 JvmtiDeferredEvent JvmtiDeferredEvent::compiled_method_unload_event( |
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899 nmethod* nm, jmethodID id, const void* code) { |
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900 JvmtiDeferredEvent event = JvmtiDeferredEvent(TYPE_COMPILED_METHOD_UNLOAD); |
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901 event._event_data.compiled_method_unload.nm = nm; |
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902 event._event_data.compiled_method_unload.method_id = id; |
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903 event._event_data.compiled_method_unload.code_begin = code; |
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904 // Keep the nmethod alive until the ServiceThread can process |
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905 // this deferred event. This will keep the memory for the |
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|
906 // generated code from being reused too early. We pass |
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907 // zombie_ok == true here so that our nmethod that was just |
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908 // made into a zombie can be locked. |
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909 nmethodLocker::lock_nmethod(nm, true /* zombie_ok */); |
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910 return event; |
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911 } |
3304
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912 |
2301
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913 JvmtiDeferredEvent JvmtiDeferredEvent::dynamic_code_generated_event( |
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914 const char* name, const void* code_begin, const void* code_end) { |
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915 JvmtiDeferredEvent event = JvmtiDeferredEvent(TYPE_DYNAMIC_CODE_GENERATED); |
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916 // Need to make a copy of the name since we don't know how long |
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917 // the event poster will keep it around after we enqueue the |
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918 // deferred event and return. strdup() failure is handled in |
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919 // the post() routine below. |
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920 event._event_data.dynamic_code_generated.name = os::strdup(name); |
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921 event._event_data.dynamic_code_generated.code_begin = code_begin; |
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922 event._event_data.dynamic_code_generated.code_end = code_end; |
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923 return event; |
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924 } |
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925 |
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926 void JvmtiDeferredEvent::post() { |
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927 assert(ServiceThread::is_service_thread(Thread::current()), |
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928 "Service thread must post enqueued events"); |
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929 switch(_type) { |
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930 case TYPE_COMPILED_METHOD_LOAD: { |
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931 nmethod* nm = _event_data.compiled_method_load; |
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932 JvmtiExport::post_compiled_method_load(nm); |
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933 // done with the deferred event so unlock the nmethod |
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934 nmethodLocker::unlock_nmethod(nm); |
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935 break; |
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936 } |
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937 case TYPE_COMPILED_METHOD_UNLOAD: { |
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938 nmethod* nm = _event_data.compiled_method_unload.nm; |
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939 JvmtiExport::post_compiled_method_unload( |
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940 _event_data.compiled_method_unload.method_id, |
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941 _event_data.compiled_method_unload.code_begin); |
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942 // done with the deferred event so unlock the nmethod |
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943 nmethodLocker::unlock_nmethod(nm); |
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944 break; |
2342
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945 } |
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946 case TYPE_DYNAMIC_CODE_GENERATED: { |
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947 JvmtiExport::post_dynamic_code_generated_internal( |
3304
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948 // if strdup failed give the event a default name |
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949 (_event_data.dynamic_code_generated.name == NULL) |
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950 ? "unknown_code" : _event_data.dynamic_code_generated.name, |
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951 _event_data.dynamic_code_generated.code_begin, |
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952 _event_data.dynamic_code_generated.code_end); |
3304
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953 if (_event_data.dynamic_code_generated.name != NULL) { |
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|
954 // release our copy |
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|
955 os::free((void *)_event_data.dynamic_code_generated.name); |
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|
956 } |
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957 break; |
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|
958 } |
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|
959 default: |
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|
960 ShouldNotReachHere(); |
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|
961 } |
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|
962 } |
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|
963 |
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|
964 JvmtiDeferredEventQueue::QueueNode* JvmtiDeferredEventQueue::_queue_tail = NULL; |
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|
965 JvmtiDeferredEventQueue::QueueNode* JvmtiDeferredEventQueue::_queue_head = NULL; |
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|
966 |
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|
967 volatile JvmtiDeferredEventQueue::QueueNode* |
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968 JvmtiDeferredEventQueue::_pending_list = NULL; |
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|
969 |
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|
970 bool JvmtiDeferredEventQueue::has_events() { |
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971 assert(Service_lock->owned_by_self(), "Must own Service_lock"); |
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|
972 return _queue_head != NULL || _pending_list != NULL; |
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|
973 } |
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|
974 |
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|
975 void JvmtiDeferredEventQueue::enqueue(const JvmtiDeferredEvent& event) { |
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|
976 assert(Service_lock->owned_by_self(), "Must own Service_lock"); |
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|
977 |
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|
978 process_pending_events(); |
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|
979 |
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|
980 // Events get added to the end of the queue (and are pulled off the front). |
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|
981 QueueNode* node = new QueueNode(event); |
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982 if (_queue_tail == NULL) { |
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983 _queue_tail = _queue_head = node; |
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984 } else { |
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985 assert(_queue_tail->next() == NULL, "Must be the last element in the list"); |
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|
986 _queue_tail->set_next(node); |
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|
987 _queue_tail = node; |
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|
988 } |
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|
989 |
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|
990 Service_lock->notify_all(); |
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|
991 assert((_queue_head == NULL) == (_queue_tail == NULL), |
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|
992 "Inconsistent queue markers"); |
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|
993 } |
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changeset
|
994 |
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|
995 JvmtiDeferredEvent JvmtiDeferredEventQueue::dequeue() { |
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|
996 assert(Service_lock->owned_by_self(), "Must own Service_lock"); |
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|
997 |
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changeset
|
998 process_pending_events(); |
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|
999 |
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|
1000 assert(_queue_head != NULL, "Nothing to dequeue"); |
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|
1001 |
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|
1002 if (_queue_head == NULL) { |
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1003 // Just in case this happens in product; it shouldn't but let's not crash |
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|
1004 return JvmtiDeferredEvent(); |
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|
1005 } |
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|
1006 |
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|
1007 QueueNode* node = _queue_head; |
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1008 _queue_head = _queue_head->next(); |
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1009 if (_queue_head == NULL) { |
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1010 _queue_tail = NULL; |
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1011 } |
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1012 |
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1013 assert((_queue_head == NULL) == (_queue_tail == NULL), |
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1014 "Inconsistent queue markers"); |
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1015 |
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1016 JvmtiDeferredEvent event = node->event(); |
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1017 delete node; |
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1018 return event; |
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1019 } |
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1020 |
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1021 void JvmtiDeferredEventQueue::add_pending_event( |
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1022 const JvmtiDeferredEvent& event) { |
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1023 |
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1024 QueueNode* node = new QueueNode(event); |
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1025 |
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1026 bool success = false; |
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1027 QueueNode* prev_value = (QueueNode*)_pending_list; |
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1028 do { |
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1029 node->set_next(prev_value); |
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1030 prev_value = (QueueNode*)Atomic::cmpxchg_ptr( |
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1031 (void*)node, (volatile void*)&_pending_list, (void*)node->next()); |
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1032 } while (prev_value != node->next()); |
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1033 } |
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1034 |
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1035 // This method transfers any events that were added by someone NOT holding |
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1036 // the lock into the mainline queue. |
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1037 void JvmtiDeferredEventQueue::process_pending_events() { |
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1038 assert(Service_lock->owned_by_self(), "Must own Service_lock"); |
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1039 |
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1040 if (_pending_list != NULL) { |
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1041 QueueNode* head = |
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1042 (QueueNode*)Atomic::xchg_ptr(NULL, (volatile void*)&_pending_list); |
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1043 |
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1044 assert((_queue_head == NULL) == (_queue_tail == NULL), |
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1045 "Inconsistent queue markers"); |
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1046 |
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1047 if (head != NULL) { |
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1048 // Since we've treated the pending list as a stack (with newer |
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1049 // events at the beginning), we need to join the bottom of the stack |
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1050 // with the 'tail' of the queue in order to get the events in the |
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1051 // right order. We do this by reversing the pending list and appending |
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1052 // it to the queue. |
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1053 |
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1054 QueueNode* new_tail = head; |
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1055 QueueNode* new_head = NULL; |
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1056 |
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1057 // This reverses the list |
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1058 QueueNode* prev = new_tail; |
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1059 QueueNode* node = new_tail->next(); |
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1060 new_tail->set_next(NULL); |
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1061 while (node != NULL) { |
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1062 QueueNode* next = node->next(); |
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1063 node->set_next(prev); |
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1064 prev = node; |
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1065 node = next; |
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1066 } |
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1067 new_head = prev; |
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1068 |
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1069 // Now append the new list to the queue |
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1070 if (_queue_tail != NULL) { |
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1071 _queue_tail->set_next(new_head); |
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1072 } else { // _queue_head == NULL |
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1073 _queue_head = new_head; |
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1074 } |
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1075 _queue_tail = new_tail; |
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1076 } |
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1077 } |
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1078 } |