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annotate src/share/vm/interpreter/interpreterRuntime.cpp @ 1764:14197af1010e
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author | never |
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date | Fri, 27 Aug 2010 17:35:08 -0700 |
parents | 3e8fbc61cee8 |
children | d5d065957597 |
rev | line source |
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0 | 1 /* |
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2 * Copyright (c) 1997, 2010, 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 | |
25 #include "incls/_precompiled.incl" | |
26 #include "incls/_interpreterRuntime.cpp.incl" | |
27 | |
28 class UnlockFlagSaver { | |
29 private: | |
30 JavaThread* _thread; | |
31 bool _do_not_unlock; | |
32 public: | |
33 UnlockFlagSaver(JavaThread* t) { | |
34 _thread = t; | |
35 _do_not_unlock = t->do_not_unlock_if_synchronized(); | |
36 t->set_do_not_unlock_if_synchronized(false); | |
37 } | |
38 ~UnlockFlagSaver() { | |
39 _thread->set_do_not_unlock_if_synchronized(_do_not_unlock); | |
40 } | |
41 }; | |
42 | |
43 //------------------------------------------------------------------------------------------------------------------------ | |
44 // State accessors | |
45 | |
46 void InterpreterRuntime::set_bcp_and_mdp(address bcp, JavaThread *thread) { | |
47 last_frame(thread).interpreter_frame_set_bcp(bcp); | |
48 if (ProfileInterpreter) { | |
49 // ProfileTraps uses MDOs independently of ProfileInterpreter. | |
50 // That is why we must check both ProfileInterpreter and mdo != NULL. | |
51 methodDataOop mdo = last_frame(thread).interpreter_frame_method()->method_data(); | |
52 if (mdo != NULL) { | |
53 NEEDS_CLEANUP; | |
54 last_frame(thread).interpreter_frame_set_mdp(mdo->bci_to_dp(last_frame(thread).interpreter_frame_bci())); | |
55 } | |
56 } | |
57 } | |
58 | |
59 //------------------------------------------------------------------------------------------------------------------------ | |
60 // Constants | |
61 | |
62 | |
63 IRT_ENTRY(void, InterpreterRuntime::ldc(JavaThread* thread, bool wide)) | |
64 // access constant pool | |
65 constantPoolOop pool = method(thread)->constants(); | |
1565 | 66 int index = wide ? get_index_u2(thread, Bytecodes::_ldc_w) : get_index_u1(thread, Bytecodes::_ldc); |
0 | 67 constantTag tag = pool->tag_at(index); |
68 | |
69 if (tag.is_unresolved_klass() || tag.is_klass()) { | |
70 klassOop klass = pool->klass_at(index, CHECK); | |
71 oop java_class = klass->klass_part()->java_mirror(); | |
72 thread->set_vm_result(java_class); | |
73 } else { | |
74 #ifdef ASSERT | |
75 // If we entered this runtime routine, we believed the tag contained | |
76 // an unresolved string, an unresolved class or a resolved class. | |
77 // However, another thread could have resolved the unresolved string | |
78 // or class by the time we go there. | |
79 assert(tag.is_unresolved_string()|| tag.is_string(), "expected string"); | |
80 #endif | |
81 oop s_oop = pool->string_at(index, CHECK); | |
82 thread->set_vm_result(s_oop); | |
83 } | |
84 IRT_END | |
85 | |
1602 | 86 IRT_ENTRY(void, InterpreterRuntime::resolve_ldc(JavaThread* thread, Bytecodes::Code bytecode)) { |
87 assert(bytecode == Bytecodes::_fast_aldc || | |
88 bytecode == Bytecodes::_fast_aldc_w, "wrong bc"); | |
89 ResourceMark rm(thread); | |
90 methodHandle m (thread, method(thread)); | |
91 Bytecode_loadconstant* ldc = Bytecode_loadconstant_at(m, bci(thread)); | |
92 oop result = ldc->resolve_constant(THREAD); | |
93 DEBUG_ONLY(ConstantPoolCacheEntry* cpce = m->constants()->cache()->entry_at(ldc->cache_index())); | |
94 assert(result == cpce->f1(), "expected result for assembly code"); | |
95 } | |
96 IRT_END | |
97 | |
0 | 98 |
99 //------------------------------------------------------------------------------------------------------------------------ | |
100 // Allocation | |
101 | |
102 IRT_ENTRY(void, InterpreterRuntime::_new(JavaThread* thread, constantPoolOopDesc* pool, int index)) | |
103 klassOop k_oop = pool->klass_at(index, CHECK); | |
104 instanceKlassHandle klass (THREAD, k_oop); | |
105 | |
106 // Make sure we are not instantiating an abstract klass | |
107 klass->check_valid_for_instantiation(true, CHECK); | |
108 | |
109 // Make sure klass is initialized | |
110 klass->initialize(CHECK); | |
111 | |
112 // At this point the class may not be fully initialized | |
113 // because of recursive initialization. If it is fully | |
114 // initialized & has_finalized is not set, we rewrite | |
115 // it into its fast version (Note: no locking is needed | |
116 // here since this is an atomic byte write and can be | |
117 // done more than once). | |
118 // | |
119 // Note: In case of classes with has_finalized we don't | |
120 // rewrite since that saves us an extra check in | |
121 // the fast version which then would call the | |
122 // slow version anyway (and do a call back into | |
123 // Java). | |
124 // If we have a breakpoint, then we don't rewrite | |
125 // because the _breakpoint bytecode would be lost. | |
126 oop obj = klass->allocate_instance(CHECK); | |
127 thread->set_vm_result(obj); | |
128 IRT_END | |
129 | |
130 | |
131 IRT_ENTRY(void, InterpreterRuntime::newarray(JavaThread* thread, BasicType type, jint size)) | |
132 oop obj = oopFactory::new_typeArray(type, size, CHECK); | |
133 thread->set_vm_result(obj); | |
134 IRT_END | |
135 | |
136 | |
137 IRT_ENTRY(void, InterpreterRuntime::anewarray(JavaThread* thread, constantPoolOopDesc* pool, int index, jint size)) | |
138 // Note: no oopHandle for pool & klass needed since they are not used | |
139 // anymore after new_objArray() and no GC can happen before. | |
140 // (This may have to change if this code changes!) | |
141 klassOop klass = pool->klass_at(index, CHECK); | |
142 objArrayOop obj = oopFactory::new_objArray(klass, size, CHECK); | |
143 thread->set_vm_result(obj); | |
144 IRT_END | |
145 | |
146 | |
147 IRT_ENTRY(void, InterpreterRuntime::multianewarray(JavaThread* thread, jint* first_size_address)) | |
148 // We may want to pass in more arguments - could make this slightly faster | |
149 constantPoolOop constants = method(thread)->constants(); | |
1565 | 150 int i = get_index_u2(thread, Bytecodes::_multianewarray); |
0 | 151 klassOop klass = constants->klass_at(i, CHECK); |
152 int nof_dims = number_of_dimensions(thread); | |
153 assert(oop(klass)->is_klass(), "not a class"); | |
154 assert(nof_dims >= 1, "multianewarray rank must be nonzero"); | |
155 | |
156 // We must create an array of jints to pass to multi_allocate. | |
157 ResourceMark rm(thread); | |
158 const int small_dims = 10; | |
159 jint dim_array[small_dims]; | |
160 jint *dims = &dim_array[0]; | |
161 if (nof_dims > small_dims) { | |
162 dims = (jint*) NEW_RESOURCE_ARRAY(jint, nof_dims); | |
163 } | |
164 for (int index = 0; index < nof_dims; index++) { | |
165 // offset from first_size_address is addressed as local[index] | |
166 int n = Interpreter::local_offset_in_bytes(index)/jintSize; | |
167 dims[index] = first_size_address[n]; | |
168 } | |
169 oop obj = arrayKlass::cast(klass)->multi_allocate(nof_dims, dims, CHECK); | |
170 thread->set_vm_result(obj); | |
171 IRT_END | |
172 | |
173 | |
174 IRT_ENTRY(void, InterpreterRuntime::register_finalizer(JavaThread* thread, oopDesc* obj)) | |
175 assert(obj->is_oop(), "must be a valid oop"); | |
176 assert(obj->klass()->klass_part()->has_finalizer(), "shouldn't be here otherwise"); | |
177 instanceKlass::register_finalizer(instanceOop(obj), CHECK); | |
178 IRT_END | |
179 | |
180 | |
181 // Quicken instance-of and check-cast bytecodes | |
182 IRT_ENTRY(void, InterpreterRuntime::quicken_io_cc(JavaThread* thread)) | |
183 // Force resolving; quicken the bytecode | |
1565 | 184 int which = get_index_u2(thread, Bytecodes::_checkcast); |
0 | 185 constantPoolOop cpool = method(thread)->constants(); |
186 // We'd expect to assert that we're only here to quicken bytecodes, but in a multithreaded | |
187 // program we might have seen an unquick'd bytecode in the interpreter but have another | |
188 // thread quicken the bytecode before we get here. | |
189 // assert( cpool->tag_at(which).is_unresolved_klass(), "should only come here to quicken bytecodes" ); | |
190 klassOop klass = cpool->klass_at(which, CHECK); | |
191 thread->set_vm_result(klass); | |
192 IRT_END | |
193 | |
194 | |
195 //------------------------------------------------------------------------------------------------------------------------ | |
196 // Exceptions | |
197 | |
198 // Assume the compiler is (or will be) interested in this event. | |
199 // If necessary, create an MDO to hold the information, and record it. | |
200 void InterpreterRuntime::note_trap(JavaThread* thread, int reason, TRAPS) { | |
201 assert(ProfileTraps, "call me only if profiling"); | |
202 methodHandle trap_method(thread, method(thread)); | |
203 if (trap_method.not_null()) { | |
204 methodDataHandle trap_mdo(thread, trap_method->method_data()); | |
205 if (trap_mdo.is_null()) { | |
206 methodOopDesc::build_interpreter_method_data(trap_method, THREAD); | |
207 if (HAS_PENDING_EXCEPTION) { | |
208 assert((PENDING_EXCEPTION->is_a(SystemDictionary::OutOfMemoryError_klass())), "we expect only an OOM error here"); | |
209 CLEAR_PENDING_EXCEPTION; | |
210 } | |
211 trap_mdo = methodDataHandle(thread, trap_method->method_data()); | |
212 // and fall through... | |
213 } | |
214 if (trap_mdo.not_null()) { | |
215 // Update per-method count of trap events. The interpreter | |
216 // is updating the MDO to simulate the effect of compiler traps. | |
217 int trap_bci = trap_method->bci_from(bcp(thread)); | |
218 Deoptimization::update_method_data_from_interpreter(trap_mdo, trap_bci, reason); | |
219 } | |
220 } | |
221 } | |
222 | |
223 static Handle get_preinitialized_exception(klassOop k, TRAPS) { | |
224 // get klass | |
225 instanceKlass* klass = instanceKlass::cast(k); | |
226 assert(klass->is_initialized(), | |
227 "this klass should have been initialized during VM initialization"); | |
228 // create instance - do not call constructor since we may have no | |
229 // (java) stack space left (should assert constructor is empty) | |
230 Handle exception; | |
231 oop exception_oop = klass->allocate_instance(CHECK_(exception)); | |
232 exception = Handle(THREAD, exception_oop); | |
233 if (StackTraceInThrowable) { | |
234 java_lang_Throwable::fill_in_stack_trace(exception); | |
235 } | |
236 return exception; | |
237 } | |
238 | |
239 // Special handling for stack overflow: since we don't have any (java) stack | |
240 // space left we use the pre-allocated & pre-initialized StackOverflowError | |
241 // klass to create an stack overflow error instance. We do not call its | |
242 // constructor for the same reason (it is empty, anyway). | |
243 IRT_ENTRY(void, InterpreterRuntime::throw_StackOverflowError(JavaThread* thread)) | |
244 Handle exception = get_preinitialized_exception( | |
245 SystemDictionary::StackOverflowError_klass(), | |
246 CHECK); | |
247 THROW_HANDLE(exception); | |
248 IRT_END | |
249 | |
250 | |
251 IRT_ENTRY(void, InterpreterRuntime::create_exception(JavaThread* thread, char* name, char* message)) | |
252 // lookup exception klass | |
253 symbolHandle s = oopFactory::new_symbol_handle(name, CHECK); | |
254 if (ProfileTraps) { | |
255 if (s == vmSymbols::java_lang_ArithmeticException()) { | |
256 note_trap(thread, Deoptimization::Reason_div0_check, CHECK); | |
257 } else if (s == vmSymbols::java_lang_NullPointerException()) { | |
258 note_trap(thread, Deoptimization::Reason_null_check, CHECK); | |
259 } | |
260 } | |
261 // create exception | |
262 Handle exception = Exceptions::new_exception(thread, s(), message); | |
263 thread->set_vm_result(exception()); | |
264 IRT_END | |
265 | |
266 | |
267 IRT_ENTRY(void, InterpreterRuntime::create_klass_exception(JavaThread* thread, char* name, oopDesc* obj)) | |
268 ResourceMark rm(thread); | |
269 const char* klass_name = Klass::cast(obj->klass())->external_name(); | |
270 // lookup exception klass | |
271 symbolHandle s = oopFactory::new_symbol_handle(name, CHECK); | |
272 if (ProfileTraps) { | |
273 note_trap(thread, Deoptimization::Reason_class_check, CHECK); | |
274 } | |
275 // create exception, with klass name as detail message | |
276 Handle exception = Exceptions::new_exception(thread, s(), klass_name); | |
277 thread->set_vm_result(exception()); | |
278 IRT_END | |
279 | |
280 | |
281 IRT_ENTRY(void, InterpreterRuntime::throw_ArrayIndexOutOfBoundsException(JavaThread* thread, char* name, jint index)) | |
282 char message[jintAsStringSize]; | |
283 // lookup exception klass | |
284 symbolHandle s = oopFactory::new_symbol_handle(name, CHECK); | |
285 if (ProfileTraps) { | |
286 note_trap(thread, Deoptimization::Reason_range_check, CHECK); | |
287 } | |
288 // create exception | |
289 sprintf(message, "%d", index); | |
290 THROW_MSG(s(), message); | |
291 IRT_END | |
292 | |
293 IRT_ENTRY(void, InterpreterRuntime::throw_ClassCastException( | |
294 JavaThread* thread, oopDesc* obj)) | |
295 | |
296 ResourceMark rm(thread); | |
297 char* message = SharedRuntime::generate_class_cast_message( | |
298 thread, Klass::cast(obj->klass())->external_name()); | |
299 | |
300 if (ProfileTraps) { | |
301 note_trap(thread, Deoptimization::Reason_class_check, CHECK); | |
302 } | |
303 | |
304 // create exception | |
305 THROW_MSG(vmSymbols::java_lang_ClassCastException(), message); | |
306 IRT_END | |
307 | |
710 | 308 // required can be either a MethodType, or a Class (for a single argument) |
309 // actual (if not null) can be either a MethodHandle, or an arbitrary value (for a single argument) | |
310 IRT_ENTRY(void, InterpreterRuntime::throw_WrongMethodTypeException(JavaThread* thread, | |
311 oopDesc* required, | |
312 oopDesc* actual)) { | |
313 ResourceMark rm(thread); | |
314 char* message = SharedRuntime::generate_wrong_method_type_message(thread, required, actual); | |
315 | |
316 if (ProfileTraps) { | |
317 note_trap(thread, Deoptimization::Reason_constraint, CHECK); | |
318 } | |
319 | |
320 // create exception | |
321 THROW_MSG(vmSymbols::java_dyn_WrongMethodTypeException(), message); | |
322 } | |
323 IRT_END | |
324 | |
325 | |
0 | 326 |
327 // exception_handler_for_exception(...) returns the continuation address, | |
328 // the exception oop (via TLS) and sets the bci/bcp for the continuation. | |
329 // The exception oop is returned to make sure it is preserved over GC (it | |
330 // is only on the stack if the exception was thrown explicitly via athrow). | |
331 // During this operation, the expression stack contains the values for the | |
332 // bci where the exception happened. If the exception was propagated back | |
333 // from a call, the expression stack contains the values for the bci at the | |
334 // invoke w/o arguments (i.e., as if one were inside the call). | |
335 IRT_ENTRY(address, InterpreterRuntime::exception_handler_for_exception(JavaThread* thread, oopDesc* exception)) | |
336 | |
337 Handle h_exception(thread, exception); | |
338 methodHandle h_method (thread, method(thread)); | |
339 constantPoolHandle h_constants(thread, h_method->constants()); | |
340 typeArrayHandle h_extable (thread, h_method->exception_table()); | |
341 bool should_repeat; | |
342 int handler_bci; | |
1602 | 343 int current_bci = bci(thread); |
0 | 344 |
345 // Need to do this check first since when _do_not_unlock_if_synchronized | |
346 // is set, we don't want to trigger any classloading which may make calls | |
347 // into java, or surprisingly find a matching exception handler for bci 0 | |
348 // since at this moment the method hasn't been "officially" entered yet. | |
349 if (thread->do_not_unlock_if_synchronized()) { | |
350 ResourceMark rm; | |
351 assert(current_bci == 0, "bci isn't zero for do_not_unlock_if_synchronized"); | |
352 thread->set_vm_result(exception); | |
353 #ifdef CC_INTERP | |
354 return (address) -1; | |
355 #else | |
356 return Interpreter::remove_activation_entry(); | |
357 #endif | |
358 } | |
359 | |
360 do { | |
361 should_repeat = false; | |
362 | |
363 // assertions | |
364 #ifdef ASSERT | |
365 assert(h_exception.not_null(), "NULL exceptions should be handled by athrow"); | |
366 assert(h_exception->is_oop(), "just checking"); | |
367 // Check that exception is a subclass of Throwable, otherwise we have a VerifyError | |
1142 | 368 if (!(h_exception->is_a(SystemDictionary::Throwable_klass()))) { |
0 | 369 if (ExitVMOnVerifyError) vm_exit(-1); |
370 ShouldNotReachHere(); | |
371 } | |
372 #endif | |
373 | |
374 // tracing | |
375 if (TraceExceptions) { | |
376 ttyLocker ttyl; | |
377 ResourceMark rm(thread); | |
378 tty->print_cr("Exception <%s> (" INTPTR_FORMAT ")", h_exception->print_value_string(), (address)h_exception()); | |
379 tty->print_cr(" thrown in interpreter method <%s>", h_method->print_value_string()); | |
380 tty->print_cr(" at bci %d for thread " INTPTR_FORMAT, current_bci, thread); | |
381 } | |
382 // Don't go paging in something which won't be used. | |
383 // else if (h_extable->length() == 0) { | |
384 // // disabled for now - interpreter is not using shortcut yet | |
385 // // (shortcut is not to call runtime if we have no exception handlers) | |
386 // // warning("performance bug: should not call runtime if method has no exception handlers"); | |
387 // } | |
388 // for AbortVMOnException flag | |
389 NOT_PRODUCT(Exceptions::debug_check_abort(h_exception)); | |
390 | |
391 // exception handler lookup | |
392 KlassHandle h_klass(THREAD, h_exception->klass()); | |
393 handler_bci = h_method->fast_exception_handler_bci_for(h_klass, current_bci, THREAD); | |
394 if (HAS_PENDING_EXCEPTION) { | |
395 // We threw an exception while trying to find the exception handler. | |
396 // Transfer the new exception to the exception handle which will | |
397 // be set into thread local storage, and do another lookup for an | |
398 // exception handler for this exception, this time starting at the | |
399 // BCI of the exception handler which caused the exception to be | |
400 // thrown (bug 4307310). | |
401 h_exception = Handle(THREAD, PENDING_EXCEPTION); | |
402 CLEAR_PENDING_EXCEPTION; | |
403 if (handler_bci >= 0) { | |
404 current_bci = handler_bci; | |
405 should_repeat = true; | |
406 } | |
407 } | |
408 } while (should_repeat == true); | |
409 | |
410 // notify JVMTI of an exception throw; JVMTI will detect if this is a first | |
411 // time throw or a stack unwinding throw and accordingly notify the debugger | |
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412 if (JvmtiExport::can_post_on_exceptions()) { |
0 | 413 JvmtiExport::post_exception_throw(thread, h_method(), bcp(thread), h_exception()); |
414 } | |
415 | |
416 #ifdef CC_INTERP | |
417 address continuation = (address)(intptr_t) handler_bci; | |
418 #else | |
419 address continuation = NULL; | |
420 #endif | |
421 address handler_pc = NULL; | |
422 if (handler_bci < 0 || !thread->reguard_stack((address) &continuation)) { | |
423 // Forward exception to callee (leaving bci/bcp untouched) because (a) no | |
424 // handler in this method, or (b) after a stack overflow there is not yet | |
425 // enough stack space available to reprotect the stack. | |
426 #ifndef CC_INTERP | |
427 continuation = Interpreter::remove_activation_entry(); | |
428 #endif | |
429 // Count this for compilation purposes | |
430 h_method->interpreter_throwout_increment(); | |
431 } else { | |
432 // handler in this method => change bci/bcp to handler bci/bcp and continue there | |
433 handler_pc = h_method->code_base() + handler_bci; | |
434 #ifndef CC_INTERP | |
435 set_bcp_and_mdp(handler_pc, thread); | |
436 continuation = Interpreter::dispatch_table(vtos)[*handler_pc]; | |
437 #endif | |
438 } | |
439 // notify debugger of an exception catch | |
440 // (this is good for exceptions caught in native methods as well) | |
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441 if (JvmtiExport::can_post_on_exceptions()) { |
0 | 442 JvmtiExport::notice_unwind_due_to_exception(thread, h_method(), handler_pc, h_exception(), (handler_pc != NULL)); |
443 } | |
444 | |
445 thread->set_vm_result(h_exception()); | |
446 return continuation; | |
447 IRT_END | |
448 | |
449 | |
450 IRT_ENTRY(void, InterpreterRuntime::throw_pending_exception(JavaThread* thread)) | |
451 assert(thread->has_pending_exception(), "must only ne called if there's an exception pending"); | |
452 // nothing to do - eventually we should remove this code entirely (see comments @ call sites) | |
453 IRT_END | |
454 | |
455 | |
456 IRT_ENTRY(void, InterpreterRuntime::throw_AbstractMethodError(JavaThread* thread)) | |
457 THROW(vmSymbols::java_lang_AbstractMethodError()); | |
458 IRT_END | |
459 | |
460 | |
461 IRT_ENTRY(void, InterpreterRuntime::throw_IncompatibleClassChangeError(JavaThread* thread)) | |
462 THROW(vmSymbols::java_lang_IncompatibleClassChangeError()); | |
463 IRT_END | |
464 | |
465 | |
466 //------------------------------------------------------------------------------------------------------------------------ | |
467 // Fields | |
468 // | |
469 | |
470 IRT_ENTRY(void, InterpreterRuntime::resolve_get_put(JavaThread* thread, Bytecodes::Code bytecode)) | |
471 // resolve field | |
472 FieldAccessInfo info; | |
473 constantPoolHandle pool(thread, method(thread)->constants()); | |
474 bool is_static = (bytecode == Bytecodes::_getstatic || bytecode == Bytecodes::_putstatic); | |
475 | |
476 { | |
477 JvmtiHideSingleStepping jhss(thread); | |
1565 | 478 LinkResolver::resolve_field(info, pool, get_index_u2_cpcache(thread, bytecode), |
0 | 479 bytecode, false, CHECK); |
480 } // end JvmtiHideSingleStepping | |
481 | |
482 // check if link resolution caused cpCache to be updated | |
483 if (already_resolved(thread)) return; | |
484 | |
485 // compute auxiliary field attributes | |
486 TosState state = as_TosState(info.field_type()); | |
487 | |
488 // We need to delay resolving put instructions on final fields | |
489 // until we actually invoke one. This is required so we throw | |
490 // exceptions at the correct place. If we do not resolve completely | |
491 // in the current pass, leaving the put_code set to zero will | |
492 // cause the next put instruction to reresolve. | |
493 bool is_put = (bytecode == Bytecodes::_putfield || | |
494 bytecode == Bytecodes::_putstatic); | |
495 Bytecodes::Code put_code = (Bytecodes::Code)0; | |
496 | |
497 // We also need to delay resolving getstatic instructions until the | |
498 // class is intitialized. This is required so that access to the static | |
499 // field will call the initialization function every time until the class | |
500 // is completely initialized ala. in 2.17.5 in JVM Specification. | |
501 instanceKlass *klass = instanceKlass::cast(info.klass()->as_klassOop()); | |
502 bool uninitialized_static = ((bytecode == Bytecodes::_getstatic || bytecode == Bytecodes::_putstatic) && | |
503 !klass->is_initialized()); | |
504 Bytecodes::Code get_code = (Bytecodes::Code)0; | |
505 | |
506 | |
507 if (!uninitialized_static) { | |
508 get_code = ((is_static) ? Bytecodes::_getstatic : Bytecodes::_getfield); | |
509 if (is_put || !info.access_flags().is_final()) { | |
510 put_code = ((is_static) ? Bytecodes::_putstatic : Bytecodes::_putfield); | |
511 } | |
512 } | |
513 | |
514 cache_entry(thread)->set_field( | |
515 get_code, | |
516 put_code, | |
517 info.klass(), | |
518 info.field_index(), | |
519 info.field_offset(), | |
520 state, | |
521 info.access_flags().is_final(), | |
522 info.access_flags().is_volatile() | |
523 ); | |
524 IRT_END | |
525 | |
526 | |
527 //------------------------------------------------------------------------------------------------------------------------ | |
528 // Synchronization | |
529 // | |
530 // The interpreter's synchronization code is factored out so that it can | |
531 // be shared by method invocation and synchronized blocks. | |
532 //%note synchronization_3 | |
533 | |
534 static void trace_locking(Handle& h_locking_obj, bool is_locking) { | |
535 ObjectSynchronizer::trace_locking(h_locking_obj, false, true, is_locking); | |
536 } | |
537 | |
538 | |
539 //%note monitor_1 | |
540 IRT_ENTRY_NO_ASYNC(void, InterpreterRuntime::monitorenter(JavaThread* thread, BasicObjectLock* elem)) | |
541 #ifdef ASSERT | |
542 thread->last_frame().interpreter_frame_verify_monitor(elem); | |
543 #endif | |
544 if (PrintBiasedLockingStatistics) { | |
545 Atomic::inc(BiasedLocking::slow_path_entry_count_addr()); | |
546 } | |
547 Handle h_obj(thread, elem->obj()); | |
548 assert(Universe::heap()->is_in_reserved_or_null(h_obj()), | |
549 "must be NULL or an object"); | |
550 if (UseBiasedLocking) { | |
551 // Retry fast entry if bias is revoked to avoid unnecessary inflation | |
552 ObjectSynchronizer::fast_enter(h_obj, elem->lock(), true, CHECK); | |
553 } else { | |
554 ObjectSynchronizer::slow_enter(h_obj, elem->lock(), CHECK); | |
555 } | |
556 assert(Universe::heap()->is_in_reserved_or_null(elem->obj()), | |
557 "must be NULL or an object"); | |
558 #ifdef ASSERT | |
559 thread->last_frame().interpreter_frame_verify_monitor(elem); | |
560 #endif | |
561 IRT_END | |
562 | |
563 | |
564 //%note monitor_1 | |
565 IRT_ENTRY_NO_ASYNC(void, InterpreterRuntime::monitorexit(JavaThread* thread, BasicObjectLock* elem)) | |
566 #ifdef ASSERT | |
567 thread->last_frame().interpreter_frame_verify_monitor(elem); | |
568 #endif | |
569 Handle h_obj(thread, elem->obj()); | |
570 assert(Universe::heap()->is_in_reserved_or_null(h_obj()), | |
571 "must be NULL or an object"); | |
572 if (elem == NULL || h_obj()->is_unlocked()) { | |
573 THROW(vmSymbols::java_lang_IllegalMonitorStateException()); | |
574 } | |
575 ObjectSynchronizer::slow_exit(h_obj(), elem->lock(), thread); | |
576 // Free entry. This must be done here, since a pending exception might be installed on | |
577 // exit. If it is not cleared, the exception handling code will try to unlock the monitor again. | |
578 elem->set_obj(NULL); | |
579 #ifdef ASSERT | |
580 thread->last_frame().interpreter_frame_verify_monitor(elem); | |
581 #endif | |
582 IRT_END | |
583 | |
584 | |
585 IRT_ENTRY(void, InterpreterRuntime::throw_illegal_monitor_state_exception(JavaThread* thread)) | |
586 THROW(vmSymbols::java_lang_IllegalMonitorStateException()); | |
587 IRT_END | |
588 | |
589 | |
590 IRT_ENTRY(void, InterpreterRuntime::new_illegal_monitor_state_exception(JavaThread* thread)) | |
591 // Returns an illegal exception to install into the current thread. The | |
592 // pending_exception flag is cleared so normal exception handling does not | |
593 // trigger. Any current installed exception will be overwritten. This | |
594 // method will be called during an exception unwind. | |
595 | |
596 assert(!HAS_PENDING_EXCEPTION, "no pending exception"); | |
597 Handle exception(thread, thread->vm_result()); | |
598 assert(exception() != NULL, "vm result should be set"); | |
599 thread->set_vm_result(NULL); // clear vm result before continuing (may cause memory leaks and assert failures) | |
1142 | 600 if (!exception->is_a(SystemDictionary::ThreadDeath_klass())) { |
0 | 601 exception = get_preinitialized_exception( |
602 SystemDictionary::IllegalMonitorStateException_klass(), | |
603 CATCH); | |
604 } | |
605 thread->set_vm_result(exception()); | |
606 IRT_END | |
607 | |
608 | |
609 //------------------------------------------------------------------------------------------------------------------------ | |
610 // Invokes | |
611 | |
612 IRT_ENTRY(Bytecodes::Code, InterpreterRuntime::get_original_bytecode_at(JavaThread* thread, methodOopDesc* method, address bcp)) | |
613 return method->orig_bytecode_at(method->bci_from(bcp)); | |
614 IRT_END | |
615 | |
616 IRT_ENTRY(void, InterpreterRuntime::set_original_bytecode_at(JavaThread* thread, methodOopDesc* method, address bcp, Bytecodes::Code new_code)) | |
617 method->set_orig_bytecode_at(method->bci_from(bcp), new_code); | |
618 IRT_END | |
619 | |
620 IRT_ENTRY(void, InterpreterRuntime::_breakpoint(JavaThread* thread, methodOopDesc* method, address bcp)) | |
621 JvmtiExport::post_raw_breakpoint(thread, method, bcp); | |
622 IRT_END | |
623 | |
624 IRT_ENTRY(void, InterpreterRuntime::resolve_invoke(JavaThread* thread, Bytecodes::Code bytecode)) | |
625 // extract receiver from the outgoing argument list if necessary | |
626 Handle receiver(thread, NULL); | |
627 if (bytecode == Bytecodes::_invokevirtual || bytecode == Bytecodes::_invokeinterface) { | |
628 ResourceMark rm(thread); | |
629 methodHandle m (thread, method(thread)); | |
1602 | 630 Bytecode_invoke* call = Bytecode_invoke_at(m, bci(thread)); |
0 | 631 symbolHandle signature (thread, call->signature()); |
632 receiver = Handle(thread, | |
633 thread->last_frame().interpreter_callee_receiver(signature)); | |
634 assert(Universe::heap()->is_in_reserved_or_null(receiver()), | |
635 "sanity check"); | |
636 assert(receiver.is_null() || | |
637 Universe::heap()->is_in_reserved(receiver->klass()), | |
638 "sanity check"); | |
639 } | |
640 | |
641 // resolve method | |
642 CallInfo info; | |
643 constantPoolHandle pool(thread, method(thread)->constants()); | |
644 | |
645 { | |
646 JvmtiHideSingleStepping jhss(thread); | |
647 LinkResolver::resolve_invoke(info, receiver, pool, | |
1565 | 648 get_index_u2_cpcache(thread, bytecode), bytecode, CHECK); |
0 | 649 if (JvmtiExport::can_hotswap_or_post_breakpoint()) { |
650 int retry_count = 0; | |
651 while (info.resolved_method()->is_old()) { | |
652 // It is very unlikely that method is redefined more than 100 times | |
653 // in the middle of resolve. If it is looping here more than 100 times | |
654 // means then there could be a bug here. | |
655 guarantee((retry_count++ < 100), | |
656 "Could not resolve to latest version of redefined method"); | |
657 // method is redefined in the middle of resolve so re-try. | |
658 LinkResolver::resolve_invoke(info, receiver, pool, | |
1565 | 659 get_index_u2_cpcache(thread, bytecode), bytecode, CHECK); |
0 | 660 } |
661 } | |
662 } // end JvmtiHideSingleStepping | |
663 | |
664 // check if link resolution caused cpCache to be updated | |
665 if (already_resolved(thread)) return; | |
666 | |
667 if (bytecode == Bytecodes::_invokeinterface) { | |
668 | |
669 if (TraceItables && Verbose) { | |
670 ResourceMark rm(thread); | |
671 tty->print_cr("Resolving: klass: %s to method: %s", info.resolved_klass()->name()->as_C_string(), info.resolved_method()->name()->as_C_string()); | |
672 } | |
673 if (info.resolved_method()->method_holder() == | |
1142 | 674 SystemDictionary::Object_klass()) { |
0 | 675 // NOTE: THIS IS A FIX FOR A CORNER CASE in the JVM spec |
676 // (see also cpCacheOop.cpp for details) | |
677 methodHandle rm = info.resolved_method(); | |
678 assert(rm->is_final() || info.has_vtable_index(), | |
679 "should have been set already"); | |
680 cache_entry(thread)->set_method(bytecode, rm, info.vtable_index()); | |
681 } else { | |
682 // Setup itable entry | |
683 int index = klassItable::compute_itable_index(info.resolved_method()()); | |
684 cache_entry(thread)->set_interface_call(info.resolved_method(), index); | |
685 } | |
686 } else { | |
687 cache_entry(thread)->set_method( | |
688 bytecode, | |
689 info.resolved_method(), | |
690 info.vtable_index()); | |
691 } | |
692 IRT_END | |
693 | |
694 | |
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695 // First time execution: Resolve symbols, create a permanent CallSite object. |
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696 IRT_ENTRY(void, InterpreterRuntime::resolve_invokedynamic(JavaThread* thread)) { |
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697 ResourceMark rm(thread); |
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698 |
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699 assert(EnableInvokeDynamic, ""); |
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700 |
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701 const Bytecodes::Code bytecode = Bytecodes::_invokedynamic; |
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702 |
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703 methodHandle caller_method(thread, method(thread)); |
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704 |
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705 constantPoolHandle pool(thread, caller_method->constants()); |
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706 pool->set_invokedynamic(); // mark header to flag active call sites |
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707 |
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708 int caller_bci = 0; |
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709 int site_index = 0; |
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710 { address caller_bcp = bcp(thread); |
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711 caller_bci = caller_method->bci_from(caller_bcp); |
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712 site_index = Bytes::get_native_u4(caller_bcp+1); |
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713 } |
1565 | 714 assert(site_index == InterpreterRuntime::bytecode(thread)->get_index_u4(bytecode), ""); |
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715 assert(constantPoolCacheOopDesc::is_secondary_index(site_index), "proper format"); |
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716 // there is a second CPC entries that is of interest; it caches signature info: |
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717 int main_index = pool->cache()->secondary_entry_at(site_index)->main_entry_index(); |
726
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718 |
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719 // first resolve the signature to a MH.invoke methodOop |
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720 if (!pool->cache()->entry_at(main_index)->is_resolved(bytecode)) { |
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721 JvmtiHideSingleStepping jhss(thread); |
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722 CallInfo info; |
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723 LinkResolver::resolve_invoke(info, Handle(), pool, |
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724 site_index, bytecode, CHECK); |
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725 // The main entry corresponds to a JVM_CONSTANT_InvokeDynamic, and serves |
726
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726 // as a common reference point for all invokedynamic call sites with |
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727 // that exact call descriptor. We will link it in the CP cache exactly |
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728 // as if it were an invokevirtual of MethodHandle.invoke. |
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729 pool->cache()->entry_at(main_index)->set_method( |
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730 bytecode, |
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731 info.resolved_method(), |
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732 info.vtable_index()); |
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733 } |
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734 |
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735 // The method (f2 entry) of the main entry is the MH.invoke for the |
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736 // invokedynamic target call signature. |
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737 oop f1_value = pool->cache()->entry_at(main_index)->f1(); |
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738 methodHandle signature_invoker(THREAD, (methodOop) f1_value); |
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739 assert(signature_invoker.not_null() && signature_invoker->is_method() && signature_invoker->is_method_handle_invoke(), |
726
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740 "correct result from LinkResolver::resolve_invokedynamic"); |
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741 |
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742 Handle bootm = SystemDictionary::find_bootstrap_method(caller_method, caller_bci, |
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743 main_index, CHECK); |
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744 if (bootm.is_null()) { |
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745 THROW_MSG(vmSymbols::java_lang_IllegalStateException(), |
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746 "no bootstrap method found for invokedynamic"); |
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747 } |
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748 |
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749 // Short circuit if CallSite has been bound already: |
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750 if (!pool->cache()->secondary_entry_at(site_index)->is_f1_null()) |
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751 return; |
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752 |
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753 symbolHandle call_site_name(THREAD, pool->name_ref_at(site_index)); |
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754 |
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755 Handle info; // NYI: Other metadata from a new kind of CP entry. (Annotations?) |
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756 |
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757 Handle call_site |
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758 = SystemDictionary::make_dynamic_call_site(bootm, |
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759 // Callee information: |
726
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760 call_site_name, |
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761 signature_invoker, |
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762 info, |
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763 // Caller information: |
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764 caller_method, |
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765 caller_bci, |
726
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766 CHECK); |
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767 |
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768 // In the secondary entry, the f1 field is the call site, and the f2 (index) |
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769 // field is some data about the invoke site. Currently, it is just the BCI. |
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770 // Later, it might be changed to help manage inlining dependencies. |
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771 pool->cache()->secondary_entry_at(site_index)->set_dynamic_call(call_site, signature_invoker); |
726
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772 } |
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773 IRT_END |
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774 |
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775 |
0 | 776 //------------------------------------------------------------------------------------------------------------------------ |
777 // Miscellaneous | |
778 | |
779 | |
780 #ifndef PRODUCT | |
781 static void trace_frequency_counter_overflow(methodHandle m, int branch_bci, int bci, address branch_bcp) { | |
782 if (TraceInvocationCounterOverflow) { | |
783 InvocationCounter* ic = m->invocation_counter(); | |
784 InvocationCounter* bc = m->backedge_counter(); | |
785 ResourceMark rm; | |
786 const char* msg = | |
787 branch_bcp == NULL | |
788 ? "comp-policy cntr ovfl @ %d in entry of " | |
789 : "comp-policy cntr ovfl @ %d in loop of "; | |
790 tty->print(msg, bci); | |
791 m->print_value(); | |
792 tty->cr(); | |
793 ic->print(); | |
794 bc->print(); | |
795 if (ProfileInterpreter) { | |
796 if (branch_bcp != NULL) { | |
797 methodDataOop mdo = m->method_data(); | |
798 if (mdo != NULL) { | |
799 int count = mdo->bci_to_data(branch_bci)->as_JumpData()->taken(); | |
800 tty->print_cr("back branch count = %d", count); | |
801 } | |
802 } | |
803 } | |
804 } | |
805 } | |
806 | |
807 static void trace_osr_request(methodHandle method, nmethod* osr, int bci) { | |
808 if (TraceOnStackReplacement) { | |
809 ResourceMark rm; | |
810 tty->print(osr != NULL ? "Reused OSR entry for " : "Requesting OSR entry for "); | |
811 method->print_short_name(tty); | |
812 tty->print_cr(" at bci %d", bci); | |
813 } | |
814 } | |
815 #endif // !PRODUCT | |
816 | |
941 | 817 nmethod* InterpreterRuntime::frequency_counter_overflow(JavaThread* thread, address branch_bcp) { |
818 nmethod* nm = frequency_counter_overflow_inner(thread, branch_bcp); | |
819 assert(branch_bcp != NULL || nm == NULL, "always returns null for non OSR requests"); | |
820 if (branch_bcp != NULL && nm != NULL) { | |
821 // This was a successful request for an OSR nmethod. Because | |
822 // frequency_counter_overflow_inner ends with a safepoint check, | |
823 // nm could have been unloaded so look it up again. It's unsafe | |
824 // to examine nm directly since it might have been freed and used | |
825 // for something else. | |
826 frame fr = thread->last_frame(); | |
827 methodOop method = fr.interpreter_frame_method(); | |
828 int bci = method->bci_from(fr.interpreter_frame_bcp()); | |
829 nm = method->lookup_osr_nmethod_for(bci); | |
830 } | |
831 return nm; | |
832 } | |
833 | |
0 | 834 IRT_ENTRY(nmethod*, |
941 | 835 InterpreterRuntime::frequency_counter_overflow_inner(JavaThread* thread, address branch_bcp)) |
0 | 836 // use UnlockFlagSaver to clear and restore the _do_not_unlock_if_synchronized |
837 // flag, in case this method triggers classloading which will call into Java. | |
838 UnlockFlagSaver fs(thread); | |
839 | |
840 frame fr = thread->last_frame(); | |
841 assert(fr.is_interpreted_frame(), "must come from interpreter"); | |
842 methodHandle method(thread, fr.interpreter_frame_method()); | |
843 const int branch_bci = branch_bcp != NULL ? method->bci_from(branch_bcp) : 0; | |
844 const int bci = method->bci_from(fr.interpreter_frame_bcp()); | |
845 NOT_PRODUCT(trace_frequency_counter_overflow(method, branch_bci, bci, branch_bcp);) | |
846 | |
847 if (JvmtiExport::can_post_interpreter_events()) { | |
848 if (thread->is_interp_only_mode()) { | |
849 // If certain JVMTI events (e.g. frame pop event) are requested then the | |
850 // thread is forced to remain in interpreted code. This is | |
851 // implemented partly by a check in the run_compiled_code | |
852 // section of the interpreter whether we should skip running | |
853 // compiled code, and partly by skipping OSR compiles for | |
854 // interpreted-only threads. | |
855 if (branch_bcp != NULL) { | |
856 CompilationPolicy::policy()->reset_counter_for_back_branch_event(method); | |
857 return NULL; | |
858 } | |
859 } | |
860 } | |
861 | |
862 if (branch_bcp == NULL) { | |
863 // when code cache is full, compilation gets switched off, UseCompiler | |
864 // is set to false | |
865 if (!method->has_compiled_code() && UseCompiler) { | |
866 CompilationPolicy::policy()->method_invocation_event(method, CHECK_NULL); | |
867 } else { | |
868 // Force counter overflow on method entry, even if no compilation | |
869 // happened. (The method_invocation_event call does this also.) | |
870 CompilationPolicy::policy()->reset_counter_for_invocation_event(method); | |
871 } | |
872 // compilation at an invocation overflow no longer goes and retries test for | |
873 // compiled method. We always run the loser of the race as interpreted. | |
874 // so return NULL | |
875 return NULL; | |
876 } else { | |
877 // counter overflow in a loop => try to do on-stack-replacement | |
878 nmethod* osr_nm = method->lookup_osr_nmethod_for(bci); | |
879 NOT_PRODUCT(trace_osr_request(method, osr_nm, bci);) | |
880 // when code cache is full, we should not compile any more... | |
881 if (osr_nm == NULL && UseCompiler) { | |
882 const int branch_bci = method->bci_from(branch_bcp); | |
883 CompilationPolicy::policy()->method_back_branch_event(method, branch_bci, bci, CHECK_NULL); | |
884 osr_nm = method->lookup_osr_nmethod_for(bci); | |
885 } | |
886 if (osr_nm == NULL) { | |
887 CompilationPolicy::policy()->reset_counter_for_back_branch_event(method); | |
888 return NULL; | |
889 } else { | |
890 // We may need to do on-stack replacement which requires that no | |
891 // monitors in the activation are biased because their | |
892 // BasicObjectLocks will need to migrate during OSR. Force | |
893 // unbiasing of all monitors in the activation now (even though | |
894 // the OSR nmethod might be invalidated) because we don't have a | |
895 // safepoint opportunity later once the migration begins. | |
896 if (UseBiasedLocking) { | |
897 ResourceMark rm; | |
898 GrowableArray<Handle>* objects_to_revoke = new GrowableArray<Handle>(); | |
899 for( BasicObjectLock *kptr = fr.interpreter_frame_monitor_end(); | |
900 kptr < fr.interpreter_frame_monitor_begin(); | |
901 kptr = fr.next_monitor_in_interpreter_frame(kptr) ) { | |
902 if( kptr->obj() != NULL ) { | |
903 objects_to_revoke->append(Handle(THREAD, kptr->obj())); | |
904 } | |
905 } | |
906 BiasedLocking::revoke(objects_to_revoke); | |
907 } | |
908 return osr_nm; | |
909 } | |
910 } | |
911 IRT_END | |
912 | |
913 IRT_LEAF(jint, InterpreterRuntime::bcp_to_di(methodOopDesc* method, address cur_bcp)) | |
914 assert(ProfileInterpreter, "must be profiling interpreter"); | |
915 int bci = method->bci_from(cur_bcp); | |
916 methodDataOop mdo = method->method_data(); | |
917 if (mdo == NULL) return 0; | |
918 return mdo->bci_to_di(bci); | |
919 IRT_END | |
920 | |
921 IRT_ENTRY(jint, InterpreterRuntime::profile_method(JavaThread* thread, address cur_bcp)) | |
922 // use UnlockFlagSaver to clear and restore the _do_not_unlock_if_synchronized | |
923 // flag, in case this method triggers classloading which will call into Java. | |
924 UnlockFlagSaver fs(thread); | |
925 | |
926 assert(ProfileInterpreter, "must be profiling interpreter"); | |
927 frame fr = thread->last_frame(); | |
928 assert(fr.is_interpreted_frame(), "must come from interpreter"); | |
929 methodHandle method(thread, fr.interpreter_frame_method()); | |
930 int bci = method->bci_from(cur_bcp); | |
931 methodOopDesc::build_interpreter_method_data(method, THREAD); | |
932 if (HAS_PENDING_EXCEPTION) { | |
933 assert((PENDING_EXCEPTION->is_a(SystemDictionary::OutOfMemoryError_klass())), "we expect only an OOM error here"); | |
934 CLEAR_PENDING_EXCEPTION; | |
935 // and fall through... | |
936 } | |
937 methodDataOop mdo = method->method_data(); | |
938 if (mdo == NULL) return 0; | |
939 return mdo->bci_to_di(bci); | |
940 IRT_END | |
941 | |
942 | |
943 #ifdef ASSERT | |
944 IRT_LEAF(void, InterpreterRuntime::verify_mdp(methodOopDesc* method, address bcp, address mdp)) | |
945 assert(ProfileInterpreter, "must be profiling interpreter"); | |
946 | |
947 methodDataOop mdo = method->method_data(); | |
948 assert(mdo != NULL, "must not be null"); | |
949 | |
950 int bci = method->bci_from(bcp); | |
951 | |
952 address mdp2 = mdo->bci_to_dp(bci); | |
953 if (mdp != mdp2) { | |
954 ResourceMark rm; | |
955 ResetNoHandleMark rnm; // In a LEAF entry. | |
956 HandleMark hm; | |
957 tty->print_cr("FAILED verify : actual mdp %p expected mdp %p @ bci %d", mdp, mdp2, bci); | |
958 int current_di = mdo->dp_to_di(mdp); | |
959 int expected_di = mdo->dp_to_di(mdp2); | |
960 tty->print_cr(" actual di %d expected di %d", current_di, expected_di); | |
961 int expected_approx_bci = mdo->data_at(expected_di)->bci(); | |
962 int approx_bci = -1; | |
963 if (current_di >= 0) { | |
964 approx_bci = mdo->data_at(current_di)->bci(); | |
965 } | |
966 tty->print_cr(" actual bci is %d expected bci %d", approx_bci, expected_approx_bci); | |
967 mdo->print_on(tty); | |
968 method->print_codes(); | |
969 } | |
970 assert(mdp == mdp2, "wrong mdp"); | |
971 IRT_END | |
972 #endif // ASSERT | |
973 | |
974 IRT_ENTRY(void, InterpreterRuntime::update_mdp_for_ret(JavaThread* thread, int return_bci)) | |
975 assert(ProfileInterpreter, "must be profiling interpreter"); | |
976 ResourceMark rm(thread); | |
977 HandleMark hm(thread); | |
978 frame fr = thread->last_frame(); | |
979 assert(fr.is_interpreted_frame(), "must come from interpreter"); | |
980 methodDataHandle h_mdo(thread, fr.interpreter_frame_method()->method_data()); | |
981 | |
982 // Grab a lock to ensure atomic access to setting the return bci and | |
983 // the displacement. This can block and GC, invalidating all naked oops. | |
984 MutexLocker ml(RetData_lock); | |
985 | |
986 // ProfileData is essentially a wrapper around a derived oop, so we | |
987 // need to take the lock before making any ProfileData structures. | |
988 ProfileData* data = h_mdo->data_at(h_mdo->dp_to_di(fr.interpreter_frame_mdp())); | |
989 RetData* rdata = data->as_RetData(); | |
990 address new_mdp = rdata->fixup_ret(return_bci, h_mdo); | |
991 fr.interpreter_frame_set_mdp(new_mdp); | |
992 IRT_END | |
993 | |
994 | |
995 IRT_ENTRY(void, InterpreterRuntime::at_safepoint(JavaThread* thread)) | |
996 // We used to need an explict preserve_arguments here for invoke bytecodes. However, | |
997 // stack traversal automatically takes care of preserving arguments for invoke, so | |
998 // this is no longer needed. | |
999 | |
1000 // IRT_END does an implicit safepoint check, hence we are guaranteed to block | |
1001 // if this is called during a safepoint | |
1002 | |
1003 if (JvmtiExport::should_post_single_step()) { | |
1004 // We are called during regular safepoints and when the VM is | |
1005 // single stepping. If any thread is marked for single stepping, | |
1006 // then we may have JVMTI work to do. | |
1007 JvmtiExport::at_single_stepping_point(thread, method(thread), bcp(thread)); | |
1008 } | |
1009 IRT_END | |
1010 | |
1011 IRT_ENTRY(void, InterpreterRuntime::post_field_access(JavaThread *thread, oopDesc* obj, | |
1012 ConstantPoolCacheEntry *cp_entry)) | |
1013 | |
1014 // check the access_flags for the field in the klass | |
1015 instanceKlass* ik = instanceKlass::cast((klassOop)cp_entry->f1()); | |
1016 typeArrayOop fields = ik->fields(); | |
1017 int index = cp_entry->field_index(); | |
1018 assert(index < fields->length(), "holders field index is out of range"); | |
1019 // bail out if field accesses are not watched | |
1020 if ((fields->ushort_at(index) & JVM_ACC_FIELD_ACCESS_WATCHED) == 0) return; | |
1021 | |
1022 switch(cp_entry->flag_state()) { | |
1023 case btos: // fall through | |
1024 case ctos: // fall through | |
1025 case stos: // fall through | |
1026 case itos: // fall through | |
1027 case ftos: // fall through | |
1028 case ltos: // fall through | |
1029 case dtos: // fall through | |
1030 case atos: break; | |
1031 default: ShouldNotReachHere(); return; | |
1032 } | |
1033 bool is_static = (obj == NULL); | |
1034 HandleMark hm(thread); | |
1035 | |
1036 Handle h_obj; | |
1037 if (!is_static) { | |
1038 // non-static field accessors have an object, but we need a handle | |
1039 h_obj = Handle(thread, obj); | |
1040 } | |
1041 instanceKlassHandle h_cp_entry_f1(thread, (klassOop)cp_entry->f1()); | |
1042 jfieldID fid = jfieldIDWorkaround::to_jfieldID(h_cp_entry_f1, cp_entry->f2(), is_static); | |
1043 JvmtiExport::post_field_access(thread, method(thread), bcp(thread), h_cp_entry_f1, h_obj, fid); | |
1044 IRT_END | |
1045 | |
1046 IRT_ENTRY(void, InterpreterRuntime::post_field_modification(JavaThread *thread, | |
1047 oopDesc* obj, ConstantPoolCacheEntry *cp_entry, jvalue *value)) | |
1048 | |
1049 klassOop k = (klassOop)cp_entry->f1(); | |
1050 | |
1051 // check the access_flags for the field in the klass | |
1052 instanceKlass* ik = instanceKlass::cast(k); | |
1053 typeArrayOop fields = ik->fields(); | |
1054 int index = cp_entry->field_index(); | |
1055 assert(index < fields->length(), "holders field index is out of range"); | |
1056 // bail out if field modifications are not watched | |
1057 if ((fields->ushort_at(index) & JVM_ACC_FIELD_MODIFICATION_WATCHED) == 0) return; | |
1058 | |
1059 char sig_type = '\0'; | |
1060 | |
1061 switch(cp_entry->flag_state()) { | |
1062 case btos: sig_type = 'Z'; break; | |
1063 case ctos: sig_type = 'C'; break; | |
1064 case stos: sig_type = 'S'; break; | |
1065 case itos: sig_type = 'I'; break; | |
1066 case ftos: sig_type = 'F'; break; | |
1067 case atos: sig_type = 'L'; break; | |
1068 case ltos: sig_type = 'J'; break; | |
1069 case dtos: sig_type = 'D'; break; | |
1070 default: ShouldNotReachHere(); return; | |
1071 } | |
1072 bool is_static = (obj == NULL); | |
1073 | |
1074 HandleMark hm(thread); | |
1075 instanceKlassHandle h_klass(thread, k); | |
1076 jfieldID fid = jfieldIDWorkaround::to_jfieldID(h_klass, cp_entry->f2(), is_static); | |
1077 jvalue fvalue; | |
1078 #ifdef _LP64 | |
1079 fvalue = *value; | |
1080 #else | |
1081 // Long/double values are stored unaligned and also noncontiguously with | |
1082 // tagged stacks. We can't just do a simple assignment even in the non- | |
1083 // J/D cases because a C++ compiler is allowed to assume that a jvalue is | |
1084 // 8-byte aligned, and interpreter stack slots are only 4-byte aligned. | |
1085 // We assume that the two halves of longs/doubles are stored in interpreter | |
1086 // stack slots in platform-endian order. | |
1087 jlong_accessor u; | |
1088 jint* newval = (jint*)value; | |
1089 u.words[0] = newval[0]; | |
1506 | 1090 u.words[1] = newval[Interpreter::stackElementWords]; // skip if tag |
0 | 1091 fvalue.j = u.long_value; |
1092 #endif // _LP64 | |
1093 | |
1094 Handle h_obj; | |
1095 if (!is_static) { | |
1096 // non-static field accessors have an object, but we need a handle | |
1097 h_obj = Handle(thread, obj); | |
1098 } | |
1099 | |
1100 JvmtiExport::post_raw_field_modification(thread, method(thread), bcp(thread), h_klass, h_obj, | |
1101 fid, sig_type, &fvalue); | |
1102 IRT_END | |
1103 | |
1104 IRT_ENTRY(void, InterpreterRuntime::post_method_entry(JavaThread *thread)) | |
1105 JvmtiExport::post_method_entry(thread, InterpreterRuntime::method(thread), InterpreterRuntime::last_frame(thread)); | |
1106 IRT_END | |
1107 | |
1108 | |
1109 IRT_ENTRY(void, InterpreterRuntime::post_method_exit(JavaThread *thread)) | |
1110 JvmtiExport::post_method_exit(thread, InterpreterRuntime::method(thread), InterpreterRuntime::last_frame(thread)); | |
1111 IRT_END | |
1112 | |
1113 IRT_LEAF(int, InterpreterRuntime::interpreter_contains(address pc)) | |
1114 { | |
1115 return (Interpreter::contains(pc) ? 1 : 0); | |
1116 } | |
1117 IRT_END | |
1118 | |
1119 | |
1120 // Implementation of SignatureHandlerLibrary | |
1121 | |
1122 address SignatureHandlerLibrary::set_handler_blob() { | |
1123 BufferBlob* handler_blob = BufferBlob::create("native signature handlers", blob_size); | |
1124 if (handler_blob == NULL) { | |
1125 return NULL; | |
1126 } | |
1748 | 1127 address handler = handler_blob->code_begin(); |
0 | 1128 _handler_blob = handler_blob; |
1129 _handler = handler; | |
1130 return handler; | |
1131 } | |
1132 | |
1133 void SignatureHandlerLibrary::initialize() { | |
1134 if (_fingerprints != NULL) { | |
1135 return; | |
1136 } | |
1137 if (set_handler_blob() == NULL) { | |
1138 vm_exit_out_of_memory(blob_size, "native signature handlers"); | |
1139 } | |
1140 | |
1141 BufferBlob* bb = BufferBlob::create("Signature Handler Temp Buffer", | |
1142 SignatureHandlerLibrary::buffer_size); | |
1748 | 1143 _buffer = bb->code_begin(); |
0 | 1144 |
1145 _fingerprints = new(ResourceObj::C_HEAP)GrowableArray<uint64_t>(32, true); | |
1146 _handlers = new(ResourceObj::C_HEAP)GrowableArray<address>(32, true); | |
1147 } | |
1148 | |
1149 address SignatureHandlerLibrary::set_handler(CodeBuffer* buffer) { | |
1150 address handler = _handler; | |
1748 | 1151 int insts_size = buffer->pure_insts_size(); |
1152 if (handler + insts_size > _handler_blob->code_end()) { | |
0 | 1153 // get a new handler blob |
1154 handler = set_handler_blob(); | |
1155 } | |
1156 if (handler != NULL) { | |
1748 | 1157 memcpy(handler, buffer->insts_begin(), insts_size); |
0 | 1158 pd_set_handler(handler); |
1748 | 1159 ICache::invalidate_range(handler, insts_size); |
1160 _handler = handler + insts_size; | |
0 | 1161 } |
1162 return handler; | |
1163 } | |
1164 | |
1165 void SignatureHandlerLibrary::add(methodHandle method) { | |
1166 if (method->signature_handler() == NULL) { | |
1167 // use slow signature handler if we can't do better | |
1168 int handler_index = -1; | |
1169 // check if we can use customized (fast) signature handler | |
1170 if (UseFastSignatureHandlers && method->size_of_parameters() <= Fingerprinter::max_size_of_parameters) { | |
1171 // use customized signature handler | |
1172 MutexLocker mu(SignatureHandlerLibrary_lock); | |
1173 // make sure data structure is initialized | |
1174 initialize(); | |
1175 // lookup method signature's fingerprint | |
1176 uint64_t fingerprint = Fingerprinter(method).fingerprint(); | |
1177 handler_index = _fingerprints->find(fingerprint); | |
1178 // create handler if necessary | |
1179 if (handler_index < 0) { | |
1180 ResourceMark rm; | |
1181 ptrdiff_t align_offset = (address) | |
1182 round_to((intptr_t)_buffer, CodeEntryAlignment) - (address)_buffer; | |
1183 CodeBuffer buffer((address)(_buffer + align_offset), | |
1184 SignatureHandlerLibrary::buffer_size - align_offset); | |
1185 InterpreterRuntime::SignatureHandlerGenerator(method, &buffer).generate(fingerprint); | |
1186 // copy into code heap | |
1187 address handler = set_handler(&buffer); | |
1188 if (handler == NULL) { | |
1189 // use slow signature handler | |
1190 } else { | |
1191 // debugging suppport | |
1192 if (PrintSignatureHandlers) { | |
1193 tty->cr(); | |
1194 tty->print_cr("argument handler #%d for: %s %s (fingerprint = " UINT64_FORMAT ", %d bytes generated)", | |
1195 _handlers->length(), | |
1196 (method->is_static() ? "static" : "receiver"), | |
1197 method->name_and_sig_as_C_string(), | |
1198 fingerprint, | |
1748 | 1199 buffer.insts_size()); |
1200 Disassembler::decode(handler, handler + buffer.insts_size()); | |
0 | 1201 #ifndef PRODUCT |
1202 tty->print_cr(" --- associated result handler ---"); | |
1203 address rh_begin = Interpreter::result_handler(method()->result_type()); | |
1204 address rh_end = rh_begin; | |
1205 while (*(int*)rh_end != 0) { | |
1206 rh_end += sizeof(int); | |
1207 } | |
1208 Disassembler::decode(rh_begin, rh_end); | |
1209 #endif | |
1210 } | |
1211 // add handler to library | |
1212 _fingerprints->append(fingerprint); | |
1213 _handlers->append(handler); | |
1214 // set handler index | |
1215 assert(_fingerprints->length() == _handlers->length(), "sanity check"); | |
1216 handler_index = _fingerprints->length() - 1; | |
1217 } | |
1218 } | |
1219 } else { | |
1220 CHECK_UNHANDLED_OOPS_ONLY(Thread::current()->clear_unhandled_oops()); | |
1221 } | |
1222 if (handler_index < 0) { | |
1223 // use generic signature handler | |
1224 method->set_signature_handler(Interpreter::slow_signature_handler()); | |
1225 } else { | |
1226 // set handler | |
1227 method->set_signature_handler(_handlers->at(handler_index)); | |
1228 } | |
1229 } | |
1230 assert(method->signature_handler() == Interpreter::slow_signature_handler() || | |
1231 _handlers->find(method->signature_handler()) == _fingerprints->find(Fingerprinter(method).fingerprint()), | |
1232 "sanity check"); | |
1233 } | |
1234 | |
1235 | |
1236 BufferBlob* SignatureHandlerLibrary::_handler_blob = NULL; | |
1237 address SignatureHandlerLibrary::_handler = NULL; | |
1238 GrowableArray<uint64_t>* SignatureHandlerLibrary::_fingerprints = NULL; | |
1239 GrowableArray<address>* SignatureHandlerLibrary::_handlers = NULL; | |
1240 address SignatureHandlerLibrary::_buffer = NULL; | |
1241 | |
1242 | |
1243 IRT_ENTRY(void, InterpreterRuntime::prepare_native_call(JavaThread* thread, methodOopDesc* method)) | |
1244 methodHandle m(thread, method); | |
1245 assert(m->is_native(), "sanity check"); | |
1246 // lookup native function entry point if it doesn't exist | |
1247 bool in_base_library; | |
1248 if (!m->has_native_function()) { | |
1249 NativeLookup::lookup(m, in_base_library, CHECK); | |
1250 } | |
1251 // make sure signature handler is installed | |
1252 SignatureHandlerLibrary::add(m); | |
1253 // The interpreter entry point checks the signature handler first, | |
1254 // before trying to fetch the native entry point and klass mirror. | |
1255 // We must set the signature handler last, so that multiple processors | |
1256 // preparing the same method will be sure to see non-null entry & mirror. | |
1257 IRT_END | |
1258 | |
1259 #if defined(IA32) || defined(AMD64) | |
1260 IRT_LEAF(void, InterpreterRuntime::popframe_move_outgoing_args(JavaThread* thread, void* src_address, void* dest_address)) | |
1261 if (src_address == dest_address) { | |
1262 return; | |
1263 } | |
1264 ResetNoHandleMark rnm; // In a LEAF entry. | |
1265 HandleMark hm; | |
1266 ResourceMark rm; | |
1267 frame fr = thread->last_frame(); | |
1268 assert(fr.is_interpreted_frame(), ""); | |
1269 jint bci = fr.interpreter_frame_bci(); | |
1270 methodHandle mh(thread, fr.interpreter_frame_method()); | |
1271 Bytecode_invoke* invoke = Bytecode_invoke_at(mh, bci); | |
1272 ArgumentSizeComputer asc(invoke->signature()); | |
1138
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1273 int size_of_arguments = (asc.size() + (invoke->has_receiver() ? 1 : 0)); // receiver |
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6730276: JDI_REGRESSION tests fail with "Error: count must be non-zero" error on x86
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1274 Copy::conjoint_jbytes(src_address, dest_address, |
1506 | 1275 size_of_arguments * Interpreter::stackElementSize); |
0 | 1276 IRT_END |
1277 #endif |