Mercurial > hg > truffle
annotate src/share/vm/prims/jvmtiImpl.cpp @ 13044:a905d33ce13a
8027751: C1 crashes in Weblogic with G1 enabled
Summary: Keep T_OBJECT operands in registers for logical operations on x64
Reviewed-by: kvn, roland
author | iveresov |
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date | Tue, 05 Nov 2013 00:59:30 -0800 |
parents | 2fab5b7e6140 |
children | 910026b800b8 |
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 } |
229 | |
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230 JvmtiBreakpoint::JvmtiBreakpoint(Method* m_method, jlocation location) { |
0 | 231 _method = m_method; |
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232 _class_loader = _method->method_holder()->class_loader_data()->class_loader(); |
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233 #ifdef CHECK_UNHANDLED_OOPS |
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234 // _class_loader can't be wrapped in a Handle, because JvmtiBreakpoint:s are |
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235 // eventually allocated on the heap. |
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236 // |
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237 // The code handling JvmtiBreakpoint:s allocated on the stack can't be |
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238 // interrupted by a GC until _class_loader is reachable by the GC via the |
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239 // oops_do method. |
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240 Thread::current()->allow_unhandled_oop(&_class_loader); |
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241 #endif // CHECK_UNHANDLED_OOPS |
0 | 242 assert(_method != NULL, "_method != NULL"); |
243 _bci = (int) location; | |
244 assert(_bci >= 0, "_bci >= 0"); | |
245 } | |
246 | |
247 void JvmtiBreakpoint::copy(JvmtiBreakpoint& bp) { | |
248 _method = bp._method; | |
249 _bci = bp._bci; | |
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250 _class_loader = bp._class_loader; |
0 | 251 } |
252 | |
253 bool JvmtiBreakpoint::lessThan(JvmtiBreakpoint& bp) { | |
254 Unimplemented(); | |
255 return false; | |
256 } | |
257 | |
258 bool JvmtiBreakpoint::equals(JvmtiBreakpoint& bp) { | |
259 return _method == bp._method | |
260 && _bci == bp._bci; | |
261 } | |
262 | |
263 bool JvmtiBreakpoint::is_valid() { | |
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264 // class loader can be NULL |
0 | 265 return _method != NULL && |
266 _bci >= 0; | |
267 } | |
268 | |
269 address JvmtiBreakpoint::getBcp() { | |
270 return _method->bcp_from(_bci); | |
271 } | |
272 | |
273 void JvmtiBreakpoint::each_method_version_do(method_action meth_act) { | |
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274 ((Method*)_method->*meth_act)(_bci); |
0 | 275 |
276 // add/remove breakpoint to/from versions of the method that | |
277 // are EMCP. Directly or transitively obsolete methods are | |
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278 // not saved in the PreviousVersionNodes. |
0 | 279 Thread *thread = Thread::current(); |
280 instanceKlassHandle ikh = instanceKlassHandle(thread, _method->method_holder()); | |
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281 Symbol* m_name = _method->name(); |
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282 Symbol* m_signature = _method->signature(); |
0 | 283 |
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284 // search previous versions if they exist |
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285 PreviousVersionWalker pvw(thread, (InstanceKlass *)ikh()); |
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286 for (PreviousVersionNode * pv_node = pvw.next_previous_version(); |
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287 pv_node != NULL; pv_node = pvw.next_previous_version()) { |
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288 GrowableArray<Method*>* methods = pv_node->prev_EMCP_methods(); |
0 | 289 |
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290 if (methods == NULL) { |
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291 // We have run into a PreviousVersion generation where |
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292 // all methods were made obsolete during that generation's |
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293 // RedefineClasses() operation. At the time of that |
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294 // operation, all EMCP methods were flushed so we don't |
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295 // have to go back any further. |
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296 // |
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297 // A NULL methods array is different than an empty methods |
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298 // array. We cannot infer any optimizations about older |
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299 // generations from an empty methods array for the current |
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300 // generation. |
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301 break; |
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302 } |
0 | 303 |
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304 for (int i = methods->length() - 1; i >= 0; i--) { |
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305 Method* method = methods->at(i); |
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306 // obsolete methods that are running are not deleted from |
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307 // previous version array, but they are skipped here. |
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308 if (!method->is_obsolete() && |
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309 method->name() == m_name && |
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310 method->signature() == m_signature) { |
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311 RC_TRACE(0x00000800, ("%sing breakpoint in %s(%s)", |
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312 meth_act == &Method::set_breakpoint ? "sett" : "clear", |
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313 method->name()->as_C_string(), |
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314 method->signature()->as_C_string())); |
0 | 315 |
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316 (method->*meth_act)(_bci); |
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317 break; |
0 | 318 } |
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319 } |
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320 } |
0 | 321 } |
322 | |
323 void JvmtiBreakpoint::set() { | |
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324 each_method_version_do(&Method::set_breakpoint); |
0 | 325 } |
326 | |
327 void JvmtiBreakpoint::clear() { | |
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328 each_method_version_do(&Method::clear_breakpoint); |
0 | 329 } |
330 | |
331 void JvmtiBreakpoint::print() { | |
332 #ifndef PRODUCT | |
333 const char *class_name = (_method == NULL) ? "NULL" : _method->klass_name()->as_C_string(); | |
334 const char *method_name = (_method == NULL) ? "NULL" : _method->name()->as_C_string(); | |
335 | |
336 tty->print("Breakpoint(%s,%s,%d,%p)",class_name, method_name, _bci, getBcp()); | |
337 #endif | |
338 } | |
339 | |
340 | |
341 // | |
342 // class VM_ChangeBreakpoints | |
343 // | |
344 // Modify the Breakpoints data structure at a safepoint | |
345 // | |
346 | |
347 void VM_ChangeBreakpoints::doit() { | |
348 switch (_operation) { | |
349 case SET_BREAKPOINT: | |
350 _breakpoints->set_at_safepoint(*_bp); | |
351 break; | |
352 case CLEAR_BREAKPOINT: | |
353 _breakpoints->clear_at_safepoint(*_bp); | |
354 break; | |
355 default: | |
356 assert(false, "Unknown operation"); | |
357 } | |
358 } | |
359 | |
360 void VM_ChangeBreakpoints::oops_do(OopClosure* f) { | |
10405 | 361 // The JvmtiBreakpoints in _breakpoints will be visited via |
362 // JvmtiExport::oops_do. | |
0 | 363 if (_bp != NULL) { |
364 _bp->oops_do(f); | |
365 } | |
366 } | |
367 | |
368 // | |
369 // class JvmtiBreakpoints | |
370 // | |
371 // a JVMTI internal collection of JvmtiBreakpoint | |
372 // | |
373 | |
374 JvmtiBreakpoints::JvmtiBreakpoints(void listener_fun(void *,address *)) { | |
375 _bps.initialize(this,listener_fun); | |
376 } | |
377 | |
378 JvmtiBreakpoints:: ~JvmtiBreakpoints() {} | |
379 | |
380 void JvmtiBreakpoints::oops_do(OopClosure* f) { | |
381 _bps.oops_do(f); | |
382 } | |
383 | |
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384 void JvmtiBreakpoints::gc_epilogue() { |
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385 _bps.gc_epilogue(); |
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386 } |
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387 |
0 | 388 void JvmtiBreakpoints::print() { |
389 #ifndef PRODUCT | |
390 ResourceMark rm; | |
391 | |
392 int n = _bps.length(); | |
393 for (int i=0; i<n; i++) { | |
394 JvmtiBreakpoint& bp = _bps.at(i); | |
395 tty->print("%d: ", i); | |
396 bp.print(); | |
397 tty->print_cr(""); | |
398 } | |
399 #endif | |
400 } | |
401 | |
402 | |
403 void JvmtiBreakpoints::set_at_safepoint(JvmtiBreakpoint& bp) { | |
404 assert(SafepointSynchronize::is_at_safepoint(), "must be at safepoint"); | |
405 | |
406 int i = _bps.find(bp); | |
407 if (i == -1) { | |
408 _bps.append(bp); | |
409 bp.set(); | |
410 } | |
411 } | |
412 | |
413 void JvmtiBreakpoints::clear_at_safepoint(JvmtiBreakpoint& bp) { | |
414 assert(SafepointSynchronize::is_at_safepoint(), "must be at safepoint"); | |
415 | |
416 int i = _bps.find(bp); | |
417 if (i != -1) { | |
418 _bps.remove(i); | |
419 bp.clear(); | |
420 } | |
421 } | |
422 | |
423 int JvmtiBreakpoints::length() { return _bps.length(); } | |
424 | |
425 int JvmtiBreakpoints::set(JvmtiBreakpoint& bp) { | |
426 if ( _bps.find(bp) != -1) { | |
427 return JVMTI_ERROR_DUPLICATE; | |
428 } | |
10405 | 429 VM_ChangeBreakpoints set_breakpoint(VM_ChangeBreakpoints::SET_BREAKPOINT, &bp); |
0 | 430 VMThread::execute(&set_breakpoint); |
431 return JVMTI_ERROR_NONE; | |
432 } | |
433 | |
434 int JvmtiBreakpoints::clear(JvmtiBreakpoint& bp) { | |
435 if ( _bps.find(bp) == -1) { | |
436 return JVMTI_ERROR_NOT_FOUND; | |
437 } | |
438 | |
10405 | 439 VM_ChangeBreakpoints clear_breakpoint(VM_ChangeBreakpoints::CLEAR_BREAKPOINT, &bp); |
0 | 440 VMThread::execute(&clear_breakpoint); |
441 return JVMTI_ERROR_NONE; | |
442 } | |
443 | |
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444 void JvmtiBreakpoints::clearall_in_class_at_safepoint(Klass* klass) { |
0 | 445 bool changed = true; |
446 // We are going to run thru the list of bkpts | |
447 // and delete some. This deletion probably alters | |
448 // the list in some implementation defined way such | |
449 // that when we delete entry i, the next entry might | |
450 // no longer be at i+1. To be safe, each time we delete | |
451 // an entry, we'll just start again from the beginning. | |
452 // We'll stop when we make a pass thru the whole list without | |
453 // deleting anything. | |
454 while (changed) { | |
455 int len = _bps.length(); | |
456 changed = false; | |
457 for (int i = 0; i < len; i++) { | |
458 JvmtiBreakpoint& bp = _bps.at(i); | |
459 if (bp.method()->method_holder() == klass) { | |
460 bp.clear(); | |
461 _bps.remove(i); | |
462 // This changed 'i' so we have to start over. | |
463 changed = true; | |
464 break; | |
465 } | |
466 } | |
467 } | |
468 } | |
469 | |
470 // | |
471 // class JvmtiCurrentBreakpoints | |
472 // | |
473 | |
474 JvmtiBreakpoints *JvmtiCurrentBreakpoints::_jvmti_breakpoints = NULL; | |
475 address * JvmtiCurrentBreakpoints::_breakpoint_list = NULL; | |
476 | |
477 | |
478 JvmtiBreakpoints& JvmtiCurrentBreakpoints::get_jvmti_breakpoints() { | |
479 if (_jvmti_breakpoints != NULL) return (*_jvmti_breakpoints); | |
480 _jvmti_breakpoints = new JvmtiBreakpoints(listener_fun); | |
481 assert(_jvmti_breakpoints != NULL, "_jvmti_breakpoints != NULL"); | |
482 return (*_jvmti_breakpoints); | |
483 } | |
484 | |
485 void JvmtiCurrentBreakpoints::listener_fun(void *this_obj, address *cache) { | |
486 JvmtiBreakpoints *this_jvmti = (JvmtiBreakpoints *) this_obj; | |
487 assert(this_jvmti != NULL, "this_jvmti != NULL"); | |
488 | |
489 debug_only(int n = this_jvmti->length();); | |
490 assert(cache[n] == NULL, "cache must be NULL terminated"); | |
491 | |
492 set_breakpoint_list(cache); | |
493 } | |
494 | |
495 | |
496 void JvmtiCurrentBreakpoints::oops_do(OopClosure* f) { | |
497 if (_jvmti_breakpoints != NULL) { | |
498 _jvmti_breakpoints->oops_do(f); | |
499 } | |
500 } | |
501 | |
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502 void JvmtiCurrentBreakpoints::gc_epilogue() { |
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503 if (_jvmti_breakpoints != NULL) { |
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504 _jvmti_breakpoints->gc_epilogue(); |
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505 } |
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506 } |
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507 |
0 | 508 /////////////////////////////////////////////////////////////// |
509 // | |
510 // class VM_GetOrSetLocal | |
511 // | |
512 | |
513 // Constructor for non-object getter | |
514 VM_GetOrSetLocal::VM_GetOrSetLocal(JavaThread* thread, jint depth, int index, BasicType type) | |
515 : _thread(thread) | |
516 , _calling_thread(NULL) | |
517 , _depth(depth) | |
518 , _index(index) | |
519 , _type(type) | |
520 , _set(false) | |
521 , _jvf(NULL) | |
522 , _result(JVMTI_ERROR_NONE) | |
523 { | |
524 } | |
525 | |
526 // Constructor for object or non-object setter | |
527 VM_GetOrSetLocal::VM_GetOrSetLocal(JavaThread* thread, jint depth, int index, BasicType type, jvalue value) | |
528 : _thread(thread) | |
529 , _calling_thread(NULL) | |
530 , _depth(depth) | |
531 , _index(index) | |
532 , _type(type) | |
533 , _value(value) | |
534 , _set(true) | |
535 , _jvf(NULL) | |
536 , _result(JVMTI_ERROR_NONE) | |
537 { | |
538 } | |
539 | |
540 // Constructor for object getter | |
541 VM_GetOrSetLocal::VM_GetOrSetLocal(JavaThread* thread, JavaThread* calling_thread, jint depth, int index) | |
542 : _thread(thread) | |
543 , _calling_thread(calling_thread) | |
544 , _depth(depth) | |
545 , _index(index) | |
546 , _type(T_OBJECT) | |
547 , _set(false) | |
548 , _jvf(NULL) | |
549 , _result(JVMTI_ERROR_NONE) | |
550 { | |
551 } | |
552 | |
553 vframe *VM_GetOrSetLocal::get_vframe() { | |
554 if (!_thread->has_last_Java_frame()) { | |
555 return NULL; | |
556 } | |
557 RegisterMap reg_map(_thread); | |
558 vframe *vf = _thread->last_java_vframe(®_map); | |
559 int d = 0; | |
560 while ((vf != NULL) && (d < _depth)) { | |
561 vf = vf->java_sender(); | |
562 d++; | |
563 } | |
564 return vf; | |
565 } | |
566 | |
567 javaVFrame *VM_GetOrSetLocal::get_java_vframe() { | |
568 vframe* vf = get_vframe(); | |
569 if (vf == NULL) { | |
570 _result = JVMTI_ERROR_NO_MORE_FRAMES; | |
571 return NULL; | |
572 } | |
573 javaVFrame *jvf = (javaVFrame*)vf; | |
574 | |
2019 | 575 if (!vf->is_java_frame()) { |
0 | 576 _result = JVMTI_ERROR_OPAQUE_FRAME; |
577 return NULL; | |
578 } | |
579 return jvf; | |
580 } | |
581 | |
582 // Check that the klass is assignable to a type with the given signature. | |
583 // Another solution could be to use the function Klass::is_subtype_of(type). | |
584 // But the type class can be forced to load/initialize eagerly in such a case. | |
585 // This may cause unexpected consequences like CFLH or class-init JVMTI events. | |
586 // It is better to avoid such a behavior. | |
587 bool VM_GetOrSetLocal::is_assignable(const char* ty_sign, Klass* klass, Thread* thread) { | |
588 assert(ty_sign != NULL, "type signature must not be NULL"); | |
589 assert(thread != NULL, "thread must not be NULL"); | |
590 assert(klass != NULL, "klass must not be NULL"); | |
591 | |
592 int len = (int) strlen(ty_sign); | |
593 if (ty_sign[0] == 'L' && ty_sign[len-1] == ';') { // Need pure class/interface name | |
594 ty_sign++; | |
595 len -= 2; | |
596 } | |
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597 TempNewSymbol ty_sym = SymbolTable::new_symbol(ty_sign, len, thread); |
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598 if (klass->name() == ty_sym) { |
0 | 599 return true; |
600 } | |
601 // Compare primary supers | |
602 int super_depth = klass->super_depth(); | |
603 int idx; | |
604 for (idx = 0; idx < super_depth; idx++) { | |
6983 | 605 if (klass->primary_super_of_depth(idx)->name() == ty_sym) { |
0 | 606 return true; |
607 } | |
608 } | |
609 // Compare secondary supers | |
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610 Array<Klass*>* sec_supers = klass->secondary_supers(); |
0 | 611 for (idx = 0; idx < sec_supers->length(); idx++) { |
6983 | 612 if (((Klass*) sec_supers->at(idx))->name() == ty_sym) { |
0 | 613 return true; |
614 } | |
615 } | |
616 return false; | |
617 } | |
618 | |
619 // Checks error conditions: | |
620 // JVMTI_ERROR_INVALID_SLOT | |
621 // JVMTI_ERROR_TYPE_MISMATCH | |
622 // Returns: 'true' - everything is Ok, 'false' - error code | |
623 | |
624 bool VM_GetOrSetLocal::check_slot_type(javaVFrame* jvf) { | |
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625 Method* method_oop = jvf->method(); |
0 | 626 if (!method_oop->has_localvariable_table()) { |
627 // Just to check index boundaries | |
628 jint extra_slot = (_type == T_LONG || _type == T_DOUBLE) ? 1 : 0; | |
629 if (_index < 0 || _index + extra_slot >= method_oop->max_locals()) { | |
630 _result = JVMTI_ERROR_INVALID_SLOT; | |
631 return false; | |
632 } | |
633 return true; | |
634 } | |
635 | |
636 jint num_entries = method_oop->localvariable_table_length(); | |
637 if (num_entries == 0) { | |
638 _result = JVMTI_ERROR_INVALID_SLOT; | |
639 return false; // There are no slots | |
640 } | |
641 int signature_idx = -1; | |
642 int vf_bci = jvf->bci(); | |
643 LocalVariableTableElement* table = method_oop->localvariable_table_start(); | |
644 for (int i = 0; i < num_entries; i++) { | |
645 int start_bci = table[i].start_bci; | |
646 int end_bci = start_bci + table[i].length; | |
647 | |
648 // Here we assume that locations of LVT entries | |
649 // with the same slot number cannot be overlapped | |
650 if (_index == (jint) table[i].slot && start_bci <= vf_bci && vf_bci <= end_bci) { | |
651 signature_idx = (int) table[i].descriptor_cp_index; | |
652 break; | |
653 } | |
654 } | |
655 if (signature_idx == -1) { | |
656 _result = JVMTI_ERROR_INVALID_SLOT; | |
657 return false; // Incorrect slot index | |
658 } | |
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659 Symbol* sign_sym = method_oop->constants()->symbol_at(signature_idx); |
0 | 660 const char* signature = (const char *) sign_sym->as_utf8(); |
661 BasicType slot_type = char2type(signature[0]); | |
662 | |
663 switch (slot_type) { | |
664 case T_BYTE: | |
665 case T_SHORT: | |
666 case T_CHAR: | |
667 case T_BOOLEAN: | |
668 slot_type = T_INT; | |
669 break; | |
670 case T_ARRAY: | |
671 slot_type = T_OBJECT; | |
672 break; | |
673 }; | |
674 if (_type != slot_type) { | |
675 _result = JVMTI_ERROR_TYPE_MISMATCH; | |
676 return false; | |
677 } | |
678 | |
679 jobject jobj = _value.l; | |
680 if (_set && slot_type == T_OBJECT && jobj != NULL) { // NULL reference is allowed | |
681 // Check that the jobject class matches the return type signature. | |
682 JavaThread* cur_thread = JavaThread::current(); | |
683 HandleMark hm(cur_thread); | |
684 | |
685 Handle obj = Handle(cur_thread, JNIHandles::resolve_external_guard(jobj)); | |
686 NULL_CHECK(obj, (_result = JVMTI_ERROR_INVALID_OBJECT, false)); | |
687 KlassHandle ob_kh = KlassHandle(cur_thread, obj->klass()); | |
688 NULL_CHECK(ob_kh, (_result = JVMTI_ERROR_INVALID_OBJECT, false)); | |
689 | |
6983 | 690 if (!is_assignable(signature, ob_kh(), cur_thread)) { |
0 | 691 _result = JVMTI_ERROR_TYPE_MISMATCH; |
692 return false; | |
693 } | |
694 } | |
695 return true; | |
696 } | |
697 | |
698 static bool can_be_deoptimized(vframe* vf) { | |
699 return (vf->is_compiled_frame() && vf->fr().can_be_deoptimized()); | |
700 } | |
701 | |
702 bool VM_GetOrSetLocal::doit_prologue() { | |
703 _jvf = get_java_vframe(); | |
704 NULL_CHECK(_jvf, false); | |
705 | |
2019 | 706 if (_jvf->method()->is_native()) { |
707 if (getting_receiver() && !_jvf->method()->is_static()) { | |
708 return true; | |
709 } else { | |
710 _result = JVMTI_ERROR_OPAQUE_FRAME; | |
711 return false; | |
712 } | |
713 } | |
714 | |
0 | 715 if (!check_slot_type(_jvf)) { |
716 return false; | |
717 } | |
718 return true; | |
719 } | |
720 | |
721 void VM_GetOrSetLocal::doit() { | |
722 if (_set) { | |
723 // Force deoptimization of frame if compiled because it's | |
724 // possible the compiler emitted some locals as constant values, | |
725 // meaning they are not mutable. | |
726 if (can_be_deoptimized(_jvf)) { | |
727 | |
728 // Schedule deoptimization so that eventually the local | |
729 // update will be written to an interpreter frame. | |
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730 Deoptimization::deoptimize_frame(_jvf->thread(), _jvf->fr().id()); |
0 | 731 |
732 // Now store a new value for the local which will be applied | |
733 // once deoptimization occurs. Note however that while this | |
734 // write is deferred until deoptimization actually happens | |
735 // can vframe created after this point will have its locals | |
736 // reflecting this update so as far as anyone can see the | |
737 // write has already taken place. | |
738 | |
739 // If we are updating an oop then get the oop from the handle | |
740 // since the handle will be long gone by the time the deopt | |
741 // happens. The oop stored in the deferred local will be | |
742 // gc'd on its own. | |
743 if (_type == T_OBJECT) { | |
744 _value.l = (jobject) (JNIHandles::resolve_external_guard(_value.l)); | |
745 } | |
746 // Re-read the vframe so we can see that it is deoptimized | |
747 // [ Only need because of assert in update_local() ] | |
748 _jvf = get_java_vframe(); | |
749 ((compiledVFrame*)_jvf)->update_local(_type, _index, _value); | |
750 return; | |
751 } | |
752 StackValueCollection *locals = _jvf->locals(); | |
753 HandleMark hm; | |
754 | |
755 switch (_type) { | |
2019 | 756 case T_INT: locals->set_int_at (_index, _value.i); break; |
757 case T_LONG: locals->set_long_at (_index, _value.j); break; | |
758 case T_FLOAT: locals->set_float_at (_index, _value.f); break; | |
759 case T_DOUBLE: locals->set_double_at(_index, _value.d); break; | |
760 case T_OBJECT: { | |
761 Handle ob_h(JNIHandles::resolve_external_guard(_value.l)); | |
762 locals->set_obj_at (_index, ob_h); | |
763 break; | |
764 } | |
765 default: ShouldNotReachHere(); | |
0 | 766 } |
767 _jvf->set_locals(locals); | |
768 } else { | |
2019 | 769 if (_jvf->method()->is_native() && _jvf->is_compiled_frame()) { |
770 assert(getting_receiver(), "Can only get here when getting receiver"); | |
771 oop receiver = _jvf->fr().get_native_receiver(); | |
772 _value.l = JNIHandles::make_local(_calling_thread, receiver); | |
773 } else { | |
774 StackValueCollection *locals = _jvf->locals(); | |
0 | 775 |
2019 | 776 if (locals->at(_index)->type() == T_CONFLICT) { |
777 memset(&_value, 0, sizeof(_value)); | |
778 _value.l = NULL; | |
779 return; | |
780 } | |
0 | 781 |
2019 | 782 switch (_type) { |
783 case T_INT: _value.i = locals->int_at (_index); break; | |
784 case T_LONG: _value.j = locals->long_at (_index); break; | |
785 case T_FLOAT: _value.f = locals->float_at (_index); break; | |
786 case T_DOUBLE: _value.d = locals->double_at(_index); break; | |
787 case T_OBJECT: { | |
788 // Wrap the oop to be returned in a local JNI handle since | |
789 // oops_do() no longer applies after doit() is finished. | |
790 oop obj = locals->obj_at(_index)(); | |
791 _value.l = JNIHandles::make_local(_calling_thread, obj); | |
792 break; | |
793 } | |
794 default: ShouldNotReachHere(); | |
795 } | |
0 | 796 } |
797 } | |
798 } | |
799 | |
800 | |
801 bool VM_GetOrSetLocal::allow_nested_vm_operations() const { | |
802 return true; // May need to deoptimize | |
803 } | |
804 | |
805 | |
2019 | 806 VM_GetReceiver::VM_GetReceiver( |
807 JavaThread* thread, JavaThread* caller_thread, jint depth) | |
808 : VM_GetOrSetLocal(thread, caller_thread, depth, 0) {} | |
809 | |
0 | 810 ///////////////////////////////////////////////////////////////////////////////////////// |
811 | |
812 // | |
813 // class JvmtiSuspendControl - see comments in jvmtiImpl.hpp | |
814 // | |
815 | |
816 bool JvmtiSuspendControl::suspend(JavaThread *java_thread) { | |
817 // external suspend should have caught suspending a thread twice | |
818 | |
819 // Immediate suspension required for JPDA back-end so JVMTI agent threads do | |
820 // not deadlock due to later suspension on transitions while holding | |
821 // raw monitors. Passing true causes the immediate suspension. | |
822 // java_suspend() will catch threads in the process of exiting | |
823 // and will ignore them. | |
824 java_thread->java_suspend(); | |
825 | |
826 // It would be nice to have the following assertion in all the time, | |
827 // but it is possible for a racing resume request to have resumed | |
828 // this thread right after we suspended it. Temporarily enable this | |
829 // assertion if you are chasing a different kind of bug. | |
830 // | |
831 // assert(java_lang_Thread::thread(java_thread->threadObj()) == NULL || | |
832 // java_thread->is_being_ext_suspended(), "thread is not suspended"); | |
833 | |
834 if (java_lang_Thread::thread(java_thread->threadObj()) == NULL) { | |
835 // check again because we can get delayed in java_suspend(): | |
836 // the thread is in process of exiting. | |
837 return false; | |
838 } | |
839 | |
840 return true; | |
841 } | |
842 | |
843 bool JvmtiSuspendControl::resume(JavaThread *java_thread) { | |
844 // external suspend should have caught resuming a thread twice | |
845 assert(java_thread->is_being_ext_suspended(), "thread should be suspended"); | |
846 | |
847 // resume thread | |
848 { | |
849 // must always grab Threads_lock, see JVM_SuspendThread | |
850 MutexLocker ml(Threads_lock); | |
851 java_thread->java_resume(); | |
852 } | |
853 | |
854 return true; | |
855 } | |
856 | |
857 | |
858 void JvmtiSuspendControl::print() { | |
859 #ifndef PRODUCT | |
860 MutexLocker mu(Threads_lock); | |
861 ResourceMark rm; | |
862 | |
863 tty->print("Suspended Threads: ["); | |
864 for (JavaThread *thread = Threads::first(); thread != NULL; thread = thread->next()) { | |
8721 | 865 #ifdef JVMTI_TRACE |
0 | 866 const char *name = JvmtiTrace::safe_get_thread_name(thread); |
867 #else | |
868 const char *name = ""; | |
869 #endif /*JVMTI_TRACE */ | |
870 tty->print("%s(%c ", name, thread->is_being_ext_suspended() ? 'S' : '_'); | |
871 if (!thread->has_last_Java_frame()) { | |
872 tty->print("no stack"); | |
873 } | |
874 tty->print(") "); | |
875 } | |
876 tty->print_cr("]"); | |
877 #endif | |
878 } | |
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879 |
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880 JvmtiDeferredEvent JvmtiDeferredEvent::compiled_method_load_event( |
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881 nmethod* nm) { |
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882 JvmtiDeferredEvent event = JvmtiDeferredEvent(TYPE_COMPILED_METHOD_LOAD); |
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883 event._event_data.compiled_method_load = nm; |
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884 // Keep the nmethod alive until the ServiceThread can process |
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885 // this deferred event. |
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886 nmethodLocker::lock_nmethod(nm); |
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887 return event; |
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888 } |
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889 |
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890 JvmtiDeferredEvent JvmtiDeferredEvent::compiled_method_unload_event( |
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891 nmethod* nm, jmethodID id, const void* code) { |
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892 JvmtiDeferredEvent event = JvmtiDeferredEvent(TYPE_COMPILED_METHOD_UNLOAD); |
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893 event._event_data.compiled_method_unload.nm = nm; |
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894 event._event_data.compiled_method_unload.method_id = id; |
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895 event._event_data.compiled_method_unload.code_begin = code; |
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896 // Keep the nmethod alive until the ServiceThread can process |
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897 // this deferred event. This will keep the memory for the |
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898 // generated code from being reused too early. We pass |
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899 // zombie_ok == true here so that our nmethod that was just |
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900 // made into a zombie can be locked. |
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901 nmethodLocker::lock_nmethod(nm, true /* zombie_ok */); |
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902 return event; |
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903 } |
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904 |
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905 JvmtiDeferredEvent JvmtiDeferredEvent::dynamic_code_generated_event( |
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906 const char* name, const void* code_begin, const void* code_end) { |
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907 JvmtiDeferredEvent event = JvmtiDeferredEvent(TYPE_DYNAMIC_CODE_GENERATED); |
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908 // Need to make a copy of the name since we don't know how long |
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909 // the event poster will keep it around after we enqueue the |
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910 // deferred event and return. strdup() failure is handled in |
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911 // the post() routine below. |
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912 event._event_data.dynamic_code_generated.name = os::strdup(name); |
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913 event._event_data.dynamic_code_generated.code_begin = code_begin; |
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914 event._event_data.dynamic_code_generated.code_end = code_end; |
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915 return event; |
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916 } |
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917 |
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918 void JvmtiDeferredEvent::post() { |
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919 assert(ServiceThread::is_service_thread(Thread::current()), |
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920 "Service thread must post enqueued events"); |
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921 switch(_type) { |
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922 case TYPE_COMPILED_METHOD_LOAD: { |
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923 nmethod* nm = _event_data.compiled_method_load; |
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924 JvmtiExport::post_compiled_method_load(nm); |
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925 // done with the deferred event so unlock the nmethod |
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926 nmethodLocker::unlock_nmethod(nm); |
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927 break; |
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928 } |
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929 case TYPE_COMPILED_METHOD_UNLOAD: { |
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930 nmethod* nm = _event_data.compiled_method_unload.nm; |
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931 JvmtiExport::post_compiled_method_unload( |
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932 _event_data.compiled_method_unload.method_id, |
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933 _event_data.compiled_method_unload.code_begin); |
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934 // done with the deferred event so unlock the nmethod |
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|
935 nmethodLocker::unlock_nmethod(nm); |
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936 break; |
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|
937 } |
3304
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|
938 case TYPE_DYNAMIC_CODE_GENERATED: { |
2301
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|
939 JvmtiExport::post_dynamic_code_generated_internal( |
3304
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|
940 // if strdup failed give the event a default name |
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|
941 (_event_data.dynamic_code_generated.name == NULL) |
0cddebc420d8
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|
942 ? "unknown_code" : _event_data.dynamic_code_generated.name, |
2301
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943 _event_data.dynamic_code_generated.code_begin, |
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944 _event_data.dynamic_code_generated.code_end); |
3304
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|
945 if (_event_data.dynamic_code_generated.name != NULL) { |
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|
946 // release our copy |
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|
947 os::free((void *)_event_data.dynamic_code_generated.name); |
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|
948 } |
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|
949 break; |
3304
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|
950 } |
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|
951 default: |
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|
952 ShouldNotReachHere(); |
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|
953 } |
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|
954 } |
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|
955 |
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|
956 JvmtiDeferredEventQueue::QueueNode* JvmtiDeferredEventQueue::_queue_tail = NULL; |
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957 JvmtiDeferredEventQueue::QueueNode* JvmtiDeferredEventQueue::_queue_head = NULL; |
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|
958 |
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|
959 volatile JvmtiDeferredEventQueue::QueueNode* |
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960 JvmtiDeferredEventQueue::_pending_list = NULL; |
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|
961 |
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|
962 bool JvmtiDeferredEventQueue::has_events() { |
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963 assert(Service_lock->owned_by_self(), "Must own Service_lock"); |
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|
964 return _queue_head != NULL || _pending_list != NULL; |
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|
965 } |
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|
966 |
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|
967 void JvmtiDeferredEventQueue::enqueue(const JvmtiDeferredEvent& event) { |
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|
968 assert(Service_lock->owned_by_self(), "Must own Service_lock"); |
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|
969 |
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|
970 process_pending_events(); |
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|
971 |
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|
972 // Events get added to the end of the queue (and are pulled off the front). |
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|
973 QueueNode* node = new QueueNode(event); |
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|
974 if (_queue_tail == NULL) { |
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|
975 _queue_tail = _queue_head = node; |
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976 } else { |
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|
977 assert(_queue_tail->next() == NULL, "Must be the last element in the list"); |
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978 _queue_tail->set_next(node); |
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979 _queue_tail = node; |
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980 } |
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981 |
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982 Service_lock->notify_all(); |
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983 assert((_queue_head == NULL) == (_queue_tail == NULL), |
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984 "Inconsistent queue markers"); |
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985 } |
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986 |
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987 JvmtiDeferredEvent JvmtiDeferredEventQueue::dequeue() { |
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988 assert(Service_lock->owned_by_self(), "Must own Service_lock"); |
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989 |
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990 process_pending_events(); |
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991 |
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992 assert(_queue_head != NULL, "Nothing to dequeue"); |
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993 |
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994 if (_queue_head == NULL) { |
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995 // Just in case this happens in product; it shouldn't but let's not crash |
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996 return JvmtiDeferredEvent(); |
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997 } |
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998 |
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999 QueueNode* node = _queue_head; |
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1000 _queue_head = _queue_head->next(); |
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1001 if (_queue_head == NULL) { |
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1002 _queue_tail = NULL; |
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1003 } |
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1004 |
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1005 assert((_queue_head == NULL) == (_queue_tail == NULL), |
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1006 "Inconsistent queue markers"); |
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1007 |
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1008 JvmtiDeferredEvent event = node->event(); |
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1009 delete node; |
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1010 return event; |
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1011 } |
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1012 |
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1013 void JvmtiDeferredEventQueue::add_pending_event( |
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1014 const JvmtiDeferredEvent& event) { |
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1015 |
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1016 QueueNode* node = new QueueNode(event); |
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1017 |
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1018 bool success = false; |
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1019 QueueNode* prev_value = (QueueNode*)_pending_list; |
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1020 do { |
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1021 node->set_next(prev_value); |
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1022 prev_value = (QueueNode*)Atomic::cmpxchg_ptr( |
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1023 (void*)node, (volatile void*)&_pending_list, (void*)node->next()); |
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1024 } while (prev_value != node->next()); |
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1025 } |
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1026 |
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1027 // This method transfers any events that were added by someone NOT holding |
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1028 // the lock into the mainline queue. |
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1029 void JvmtiDeferredEventQueue::process_pending_events() { |
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1030 assert(Service_lock->owned_by_self(), "Must own Service_lock"); |
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1031 |
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1032 if (_pending_list != NULL) { |
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1033 QueueNode* head = |
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1034 (QueueNode*)Atomic::xchg_ptr(NULL, (volatile void*)&_pending_list); |
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1035 |
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1036 assert((_queue_head == NULL) == (_queue_tail == NULL), |
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1037 "Inconsistent queue markers"); |
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1038 |
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1039 if (head != NULL) { |
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1040 // Since we've treated the pending list as a stack (with newer |
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1041 // events at the beginning), we need to join the bottom of the stack |
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1042 // with the 'tail' of the queue in order to get the events in the |
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1043 // right order. We do this by reversing the pending list and appending |
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1044 // it to the queue. |
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1045 |
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1046 QueueNode* new_tail = head; |
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1047 QueueNode* new_head = NULL; |
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1048 |
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1049 // This reverses the list |
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1050 QueueNode* prev = new_tail; |
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1051 QueueNode* node = new_tail->next(); |
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1052 new_tail->set_next(NULL); |
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1053 while (node != NULL) { |
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1054 QueueNode* next = node->next(); |
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1055 node->set_next(prev); |
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1056 prev = node; |
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1057 node = next; |
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1058 } |
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1059 new_head = prev; |
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1060 |
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1061 // Now append the new list to the queue |
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1062 if (_queue_tail != NULL) { |
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1063 _queue_tail->set_next(new_head); |
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1064 } else { // _queue_head == NULL |
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1065 _queue_head = new_head; |
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1066 } |
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1067 _queue_tail = new_tail; |
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1068 } |
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1069 } |
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1070 } |