Mercurial > hg > truffle
annotate src/share/vm/interpreter/interpreterRuntime.cpp @ 1412:9195b99c841b
Added first VM entry method.
TODO: Check why initialization method of compiler is not called. Register native methods only once.
author | Thomas Wuerthinger <thomas.wuerthinger@gmail.com> |
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date | Mon, 17 May 2010 16:37:23 +0200 |
parents | 6deeaebad47a |
children | 2338d41fbd81 |
rev | line source |
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0 | 1 /* |
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2 * Copyright 1997-2010 Sun Microsystems, Inc. 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 * | |
19 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, | |
20 * CA 95054 USA or visit www.sun.com if you need additional information or | |
21 * have any questions. | |
22 * | |
23 */ | |
24 | |
25 #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(); | |
66 int index = wide ? two_byte_index(thread) : one_byte_index(thread); | |
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 | |
86 | |
87 //------------------------------------------------------------------------------------------------------------------------ | |
88 // Allocation | |
89 | |
90 IRT_ENTRY(void, InterpreterRuntime::_new(JavaThread* thread, constantPoolOopDesc* pool, int index)) | |
91 klassOop k_oop = pool->klass_at(index, CHECK); | |
92 instanceKlassHandle klass (THREAD, k_oop); | |
93 | |
94 // Make sure we are not instantiating an abstract klass | |
95 klass->check_valid_for_instantiation(true, CHECK); | |
96 | |
97 // Make sure klass is initialized | |
98 klass->initialize(CHECK); | |
99 | |
100 // At this point the class may not be fully initialized | |
101 // because of recursive initialization. If it is fully | |
102 // initialized & has_finalized is not set, we rewrite | |
103 // it into its fast version (Note: no locking is needed | |
104 // here since this is an atomic byte write and can be | |
105 // done more than once). | |
106 // | |
107 // Note: In case of classes with has_finalized we don't | |
108 // rewrite since that saves us an extra check in | |
109 // the fast version which then would call the | |
110 // slow version anyway (and do a call back into | |
111 // Java). | |
112 // If we have a breakpoint, then we don't rewrite | |
113 // because the _breakpoint bytecode would be lost. | |
114 oop obj = klass->allocate_instance(CHECK); | |
115 thread->set_vm_result(obj); | |
116 IRT_END | |
117 | |
118 | |
119 IRT_ENTRY(void, InterpreterRuntime::newarray(JavaThread* thread, BasicType type, jint size)) | |
120 oop obj = oopFactory::new_typeArray(type, size, CHECK); | |
121 thread->set_vm_result(obj); | |
122 IRT_END | |
123 | |
124 | |
125 IRT_ENTRY(void, InterpreterRuntime::anewarray(JavaThread* thread, constantPoolOopDesc* pool, int index, jint size)) | |
126 // Note: no oopHandle for pool & klass needed since they are not used | |
127 // anymore after new_objArray() and no GC can happen before. | |
128 // (This may have to change if this code changes!) | |
129 klassOop klass = pool->klass_at(index, CHECK); | |
130 objArrayOop obj = oopFactory::new_objArray(klass, size, CHECK); | |
131 thread->set_vm_result(obj); | |
132 IRT_END | |
133 | |
134 | |
135 IRT_ENTRY(void, InterpreterRuntime::multianewarray(JavaThread* thread, jint* first_size_address)) | |
136 // We may want to pass in more arguments - could make this slightly faster | |
137 constantPoolOop constants = method(thread)->constants(); | |
138 int i = two_byte_index(thread); | |
139 klassOop klass = constants->klass_at(i, CHECK); | |
140 int nof_dims = number_of_dimensions(thread); | |
141 assert(oop(klass)->is_klass(), "not a class"); | |
142 assert(nof_dims >= 1, "multianewarray rank must be nonzero"); | |
143 | |
144 // We must create an array of jints to pass to multi_allocate. | |
145 ResourceMark rm(thread); | |
146 const int small_dims = 10; | |
147 jint dim_array[small_dims]; | |
148 jint *dims = &dim_array[0]; | |
149 if (nof_dims > small_dims) { | |
150 dims = (jint*) NEW_RESOURCE_ARRAY(jint, nof_dims); | |
151 } | |
152 for (int index = 0; index < nof_dims; index++) { | |
153 // offset from first_size_address is addressed as local[index] | |
154 int n = Interpreter::local_offset_in_bytes(index)/jintSize; | |
155 dims[index] = first_size_address[n]; | |
156 } | |
157 oop obj = arrayKlass::cast(klass)->multi_allocate(nof_dims, dims, CHECK); | |
158 thread->set_vm_result(obj); | |
159 IRT_END | |
160 | |
161 | |
162 IRT_ENTRY(void, InterpreterRuntime::register_finalizer(JavaThread* thread, oopDesc* obj)) | |
163 assert(obj->is_oop(), "must be a valid oop"); | |
164 assert(obj->klass()->klass_part()->has_finalizer(), "shouldn't be here otherwise"); | |
165 instanceKlass::register_finalizer(instanceOop(obj), CHECK); | |
166 IRT_END | |
167 | |
168 | |
169 // Quicken instance-of and check-cast bytecodes | |
170 IRT_ENTRY(void, InterpreterRuntime::quicken_io_cc(JavaThread* thread)) | |
171 // Force resolving; quicken the bytecode | |
172 int which = two_byte_index(thread); | |
173 constantPoolOop cpool = method(thread)->constants(); | |
174 // We'd expect to assert that we're only here to quicken bytecodes, but in a multithreaded | |
175 // program we might have seen an unquick'd bytecode in the interpreter but have another | |
176 // thread quicken the bytecode before we get here. | |
177 // assert( cpool->tag_at(which).is_unresolved_klass(), "should only come here to quicken bytecodes" ); | |
178 klassOop klass = cpool->klass_at(which, CHECK); | |
179 thread->set_vm_result(klass); | |
180 IRT_END | |
181 | |
182 | |
183 //------------------------------------------------------------------------------------------------------------------------ | |
184 // Exceptions | |
185 | |
186 // Assume the compiler is (or will be) interested in this event. | |
187 // If necessary, create an MDO to hold the information, and record it. | |
188 void InterpreterRuntime::note_trap(JavaThread* thread, int reason, TRAPS) { | |
189 assert(ProfileTraps, "call me only if profiling"); | |
190 methodHandle trap_method(thread, method(thread)); | |
191 if (trap_method.not_null()) { | |
192 methodDataHandle trap_mdo(thread, trap_method->method_data()); | |
193 if (trap_mdo.is_null()) { | |
194 methodOopDesc::build_interpreter_method_data(trap_method, THREAD); | |
195 if (HAS_PENDING_EXCEPTION) { | |
196 assert((PENDING_EXCEPTION->is_a(SystemDictionary::OutOfMemoryError_klass())), "we expect only an OOM error here"); | |
197 CLEAR_PENDING_EXCEPTION; | |
198 } | |
199 trap_mdo = methodDataHandle(thread, trap_method->method_data()); | |
200 // and fall through... | |
201 } | |
202 if (trap_mdo.not_null()) { | |
203 // Update per-method count of trap events. The interpreter | |
204 // is updating the MDO to simulate the effect of compiler traps. | |
205 int trap_bci = trap_method->bci_from(bcp(thread)); | |
206 Deoptimization::update_method_data_from_interpreter(trap_mdo, trap_bci, reason); | |
207 } | |
208 } | |
209 } | |
210 | |
211 static Handle get_preinitialized_exception(klassOop k, TRAPS) { | |
212 // get klass | |
213 instanceKlass* klass = instanceKlass::cast(k); | |
214 assert(klass->is_initialized(), | |
215 "this klass should have been initialized during VM initialization"); | |
216 // create instance - do not call constructor since we may have no | |
217 // (java) stack space left (should assert constructor is empty) | |
218 Handle exception; | |
219 oop exception_oop = klass->allocate_instance(CHECK_(exception)); | |
220 exception = Handle(THREAD, exception_oop); | |
221 if (StackTraceInThrowable) { | |
222 java_lang_Throwable::fill_in_stack_trace(exception); | |
223 } | |
224 return exception; | |
225 } | |
226 | |
227 // Special handling for stack overflow: since we don't have any (java) stack | |
228 // space left we use the pre-allocated & pre-initialized StackOverflowError | |
229 // klass to create an stack overflow error instance. We do not call its | |
230 // constructor for the same reason (it is empty, anyway). | |
231 IRT_ENTRY(void, InterpreterRuntime::throw_StackOverflowError(JavaThread* thread)) | |
232 Handle exception = get_preinitialized_exception( | |
233 SystemDictionary::StackOverflowError_klass(), | |
234 CHECK); | |
235 THROW_HANDLE(exception); | |
236 IRT_END | |
237 | |
238 | |
239 IRT_ENTRY(void, InterpreterRuntime::create_exception(JavaThread* thread, char* name, char* message)) | |
240 // lookup exception klass | |
241 symbolHandle s = oopFactory::new_symbol_handle(name, CHECK); | |
242 if (ProfileTraps) { | |
243 if (s == vmSymbols::java_lang_ArithmeticException()) { | |
244 note_trap(thread, Deoptimization::Reason_div0_check, CHECK); | |
245 } else if (s == vmSymbols::java_lang_NullPointerException()) { | |
246 note_trap(thread, Deoptimization::Reason_null_check, CHECK); | |
247 } | |
248 } | |
249 // create exception | |
250 Handle exception = Exceptions::new_exception(thread, s(), message); | |
251 thread->set_vm_result(exception()); | |
252 IRT_END | |
253 | |
254 | |
255 IRT_ENTRY(void, InterpreterRuntime::create_klass_exception(JavaThread* thread, char* name, oopDesc* obj)) | |
256 ResourceMark rm(thread); | |
257 const char* klass_name = Klass::cast(obj->klass())->external_name(); | |
258 // lookup exception klass | |
259 symbolHandle s = oopFactory::new_symbol_handle(name, CHECK); | |
260 if (ProfileTraps) { | |
261 note_trap(thread, Deoptimization::Reason_class_check, CHECK); | |
262 } | |
263 // create exception, with klass name as detail message | |
264 Handle exception = Exceptions::new_exception(thread, s(), klass_name); | |
265 thread->set_vm_result(exception()); | |
266 IRT_END | |
267 | |
268 | |
269 IRT_ENTRY(void, InterpreterRuntime::throw_ArrayIndexOutOfBoundsException(JavaThread* thread, char* name, jint index)) | |
270 char message[jintAsStringSize]; | |
271 // lookup exception klass | |
272 symbolHandle s = oopFactory::new_symbol_handle(name, CHECK); | |
273 if (ProfileTraps) { | |
274 note_trap(thread, Deoptimization::Reason_range_check, CHECK); | |
275 } | |
276 // create exception | |
277 sprintf(message, "%d", index); | |
278 THROW_MSG(s(), message); | |
279 IRT_END | |
280 | |
281 IRT_ENTRY(void, InterpreterRuntime::throw_ClassCastException( | |
282 JavaThread* thread, oopDesc* obj)) | |
283 | |
284 ResourceMark rm(thread); | |
285 char* message = SharedRuntime::generate_class_cast_message( | |
286 thread, Klass::cast(obj->klass())->external_name()); | |
287 | |
288 if (ProfileTraps) { | |
289 note_trap(thread, Deoptimization::Reason_class_check, CHECK); | |
290 } | |
291 | |
292 // create exception | |
293 THROW_MSG(vmSymbols::java_lang_ClassCastException(), message); | |
294 IRT_END | |
295 | |
710 | 296 // required can be either a MethodType, or a Class (for a single argument) |
297 // actual (if not null) can be either a MethodHandle, or an arbitrary value (for a single argument) | |
298 IRT_ENTRY(void, InterpreterRuntime::throw_WrongMethodTypeException(JavaThread* thread, | |
299 oopDesc* required, | |
300 oopDesc* actual)) { | |
301 ResourceMark rm(thread); | |
302 char* message = SharedRuntime::generate_wrong_method_type_message(thread, required, actual); | |
303 | |
304 if (ProfileTraps) { | |
305 note_trap(thread, Deoptimization::Reason_constraint, CHECK); | |
306 } | |
307 | |
308 // create exception | |
309 THROW_MSG(vmSymbols::java_dyn_WrongMethodTypeException(), message); | |
310 } | |
311 IRT_END | |
312 | |
313 | |
0 | 314 |
315 // exception_handler_for_exception(...) returns the continuation address, | |
316 // the exception oop (via TLS) and sets the bci/bcp for the continuation. | |
317 // The exception oop is returned to make sure it is preserved over GC (it | |
318 // is only on the stack if the exception was thrown explicitly via athrow). | |
319 // During this operation, the expression stack contains the values for the | |
320 // bci where the exception happened. If the exception was propagated back | |
321 // from a call, the expression stack contains the values for the bci at the | |
322 // invoke w/o arguments (i.e., as if one were inside the call). | |
323 IRT_ENTRY(address, InterpreterRuntime::exception_handler_for_exception(JavaThread* thread, oopDesc* exception)) | |
324 | |
325 Handle h_exception(thread, exception); | |
326 methodHandle h_method (thread, method(thread)); | |
327 constantPoolHandle h_constants(thread, h_method->constants()); | |
328 typeArrayHandle h_extable (thread, h_method->exception_table()); | |
329 bool should_repeat; | |
330 int handler_bci; | |
331 int current_bci = bcp(thread) - h_method->code_base(); | |
332 | |
333 // Need to do this check first since when _do_not_unlock_if_synchronized | |
334 // is set, we don't want to trigger any classloading which may make calls | |
335 // into java, or surprisingly find a matching exception handler for bci 0 | |
336 // since at this moment the method hasn't been "officially" entered yet. | |
337 if (thread->do_not_unlock_if_synchronized()) { | |
338 ResourceMark rm; | |
339 assert(current_bci == 0, "bci isn't zero for do_not_unlock_if_synchronized"); | |
340 thread->set_vm_result(exception); | |
341 #ifdef CC_INTERP | |
342 return (address) -1; | |
343 #else | |
344 return Interpreter::remove_activation_entry(); | |
345 #endif | |
346 } | |
347 | |
348 do { | |
349 should_repeat = false; | |
350 | |
351 // assertions | |
352 #ifdef ASSERT | |
353 assert(h_exception.not_null(), "NULL exceptions should be handled by athrow"); | |
354 assert(h_exception->is_oop(), "just checking"); | |
355 // Check that exception is a subclass of Throwable, otherwise we have a VerifyError | |
1142 | 356 if (!(h_exception->is_a(SystemDictionary::Throwable_klass()))) { |
0 | 357 if (ExitVMOnVerifyError) vm_exit(-1); |
358 ShouldNotReachHere(); | |
359 } | |
360 #endif | |
361 | |
362 // tracing | |
363 if (TraceExceptions) { | |
364 ttyLocker ttyl; | |
365 ResourceMark rm(thread); | |
366 tty->print_cr("Exception <%s> (" INTPTR_FORMAT ")", h_exception->print_value_string(), (address)h_exception()); | |
367 tty->print_cr(" thrown in interpreter method <%s>", h_method->print_value_string()); | |
368 tty->print_cr(" at bci %d for thread " INTPTR_FORMAT, current_bci, thread); | |
369 } | |
370 // Don't go paging in something which won't be used. | |
371 // else if (h_extable->length() == 0) { | |
372 // // disabled for now - interpreter is not using shortcut yet | |
373 // // (shortcut is not to call runtime if we have no exception handlers) | |
374 // // warning("performance bug: should not call runtime if method has no exception handlers"); | |
375 // } | |
376 // for AbortVMOnException flag | |
377 NOT_PRODUCT(Exceptions::debug_check_abort(h_exception)); | |
378 | |
379 // exception handler lookup | |
380 KlassHandle h_klass(THREAD, h_exception->klass()); | |
381 handler_bci = h_method->fast_exception_handler_bci_for(h_klass, current_bci, THREAD); | |
382 if (HAS_PENDING_EXCEPTION) { | |
383 // We threw an exception while trying to find the exception handler. | |
384 // Transfer the new exception to the exception handle which will | |
385 // be set into thread local storage, and do another lookup for an | |
386 // exception handler for this exception, this time starting at the | |
387 // BCI of the exception handler which caused the exception to be | |
388 // thrown (bug 4307310). | |
389 h_exception = Handle(THREAD, PENDING_EXCEPTION); | |
390 CLEAR_PENDING_EXCEPTION; | |
391 if (handler_bci >= 0) { | |
392 current_bci = handler_bci; | |
393 should_repeat = true; | |
394 } | |
395 } | |
396 } while (should_repeat == true); | |
397 | |
398 // notify JVMTI of an exception throw; JVMTI will detect if this is a first | |
399 // time throw or a stack unwinding throw and accordingly notify the debugger | |
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400 if (JvmtiExport::can_post_on_exceptions()) { |
0 | 401 JvmtiExport::post_exception_throw(thread, h_method(), bcp(thread), h_exception()); |
402 } | |
403 | |
404 #ifdef CC_INTERP | |
405 address continuation = (address)(intptr_t) handler_bci; | |
406 #else | |
407 address continuation = NULL; | |
408 #endif | |
409 address handler_pc = NULL; | |
410 if (handler_bci < 0 || !thread->reguard_stack((address) &continuation)) { | |
411 // Forward exception to callee (leaving bci/bcp untouched) because (a) no | |
412 // handler in this method, or (b) after a stack overflow there is not yet | |
413 // enough stack space available to reprotect the stack. | |
414 #ifndef CC_INTERP | |
415 continuation = Interpreter::remove_activation_entry(); | |
416 #endif | |
417 // Count this for compilation purposes | |
418 h_method->interpreter_throwout_increment(); | |
419 } else { | |
420 // handler in this method => change bci/bcp to handler bci/bcp and continue there | |
421 handler_pc = h_method->code_base() + handler_bci; | |
422 #ifndef CC_INTERP | |
423 set_bcp_and_mdp(handler_pc, thread); | |
424 continuation = Interpreter::dispatch_table(vtos)[*handler_pc]; | |
425 #endif | |
426 } | |
427 // notify debugger of an exception catch | |
428 // (this is good for exceptions caught in native methods as well) | |
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429 if (JvmtiExport::can_post_on_exceptions()) { |
0 | 430 JvmtiExport::notice_unwind_due_to_exception(thread, h_method(), handler_pc, h_exception(), (handler_pc != NULL)); |
431 } | |
432 | |
433 thread->set_vm_result(h_exception()); | |
434 return continuation; | |
435 IRT_END | |
436 | |
437 | |
438 IRT_ENTRY(void, InterpreterRuntime::throw_pending_exception(JavaThread* thread)) | |
439 assert(thread->has_pending_exception(), "must only ne called if there's an exception pending"); | |
440 // nothing to do - eventually we should remove this code entirely (see comments @ call sites) | |
441 IRT_END | |
442 | |
443 | |
444 IRT_ENTRY(void, InterpreterRuntime::throw_AbstractMethodError(JavaThread* thread)) | |
445 THROW(vmSymbols::java_lang_AbstractMethodError()); | |
446 IRT_END | |
447 | |
448 | |
449 IRT_ENTRY(void, InterpreterRuntime::throw_IncompatibleClassChangeError(JavaThread* thread)) | |
450 THROW(vmSymbols::java_lang_IncompatibleClassChangeError()); | |
451 IRT_END | |
452 | |
453 | |
454 //------------------------------------------------------------------------------------------------------------------------ | |
455 // Fields | |
456 // | |
457 | |
458 IRT_ENTRY(void, InterpreterRuntime::resolve_get_put(JavaThread* thread, Bytecodes::Code bytecode)) | |
459 // resolve field | |
460 FieldAccessInfo info; | |
461 constantPoolHandle pool(thread, method(thread)->constants()); | |
462 bool is_static = (bytecode == Bytecodes::_getstatic || bytecode == Bytecodes::_putstatic); | |
463 | |
464 { | |
465 JvmtiHideSingleStepping jhss(thread); | |
466 LinkResolver::resolve_field(info, pool, two_byte_index(thread), | |
467 bytecode, false, CHECK); | |
468 } // end JvmtiHideSingleStepping | |
469 | |
470 // check if link resolution caused cpCache to be updated | |
471 if (already_resolved(thread)) return; | |
472 | |
473 // compute auxiliary field attributes | |
474 TosState state = as_TosState(info.field_type()); | |
475 | |
476 // We need to delay resolving put instructions on final fields | |
477 // until we actually invoke one. This is required so we throw | |
478 // exceptions at the correct place. If we do not resolve completely | |
479 // in the current pass, leaving the put_code set to zero will | |
480 // cause the next put instruction to reresolve. | |
481 bool is_put = (bytecode == Bytecodes::_putfield || | |
482 bytecode == Bytecodes::_putstatic); | |
483 Bytecodes::Code put_code = (Bytecodes::Code)0; | |
484 | |
485 // We also need to delay resolving getstatic instructions until the | |
486 // class is intitialized. This is required so that access to the static | |
487 // field will call the initialization function every time until the class | |
488 // is completely initialized ala. in 2.17.5 in JVM Specification. | |
489 instanceKlass *klass = instanceKlass::cast(info.klass()->as_klassOop()); | |
490 bool uninitialized_static = ((bytecode == Bytecodes::_getstatic || bytecode == Bytecodes::_putstatic) && | |
491 !klass->is_initialized()); | |
492 Bytecodes::Code get_code = (Bytecodes::Code)0; | |
493 | |
494 | |
495 if (!uninitialized_static) { | |
496 get_code = ((is_static) ? Bytecodes::_getstatic : Bytecodes::_getfield); | |
497 if (is_put || !info.access_flags().is_final()) { | |
498 put_code = ((is_static) ? Bytecodes::_putstatic : Bytecodes::_putfield); | |
499 } | |
500 } | |
501 | |
502 cache_entry(thread)->set_field( | |
503 get_code, | |
504 put_code, | |
505 info.klass(), | |
506 info.field_index(), | |
507 info.field_offset(), | |
508 state, | |
509 info.access_flags().is_final(), | |
510 info.access_flags().is_volatile() | |
511 ); | |
512 IRT_END | |
513 | |
514 | |
515 //------------------------------------------------------------------------------------------------------------------------ | |
516 // Synchronization | |
517 // | |
518 // The interpreter's synchronization code is factored out so that it can | |
519 // be shared by method invocation and synchronized blocks. | |
520 //%note synchronization_3 | |
521 | |
522 static void trace_locking(Handle& h_locking_obj, bool is_locking) { | |
523 ObjectSynchronizer::trace_locking(h_locking_obj, false, true, is_locking); | |
524 } | |
525 | |
526 | |
527 //%note monitor_1 | |
528 IRT_ENTRY_NO_ASYNC(void, InterpreterRuntime::monitorenter(JavaThread* thread, BasicObjectLock* elem)) | |
529 #ifdef ASSERT | |
530 thread->last_frame().interpreter_frame_verify_monitor(elem); | |
531 #endif | |
532 if (PrintBiasedLockingStatistics) { | |
533 Atomic::inc(BiasedLocking::slow_path_entry_count_addr()); | |
534 } | |
535 Handle h_obj(thread, elem->obj()); | |
536 assert(Universe::heap()->is_in_reserved_or_null(h_obj()), | |
537 "must be NULL or an object"); | |
538 if (UseBiasedLocking) { | |
539 // Retry fast entry if bias is revoked to avoid unnecessary inflation | |
540 ObjectSynchronizer::fast_enter(h_obj, elem->lock(), true, CHECK); | |
541 } else { | |
542 ObjectSynchronizer::slow_enter(h_obj, elem->lock(), CHECK); | |
543 } | |
544 assert(Universe::heap()->is_in_reserved_or_null(elem->obj()), | |
545 "must be NULL or an object"); | |
546 #ifdef ASSERT | |
547 thread->last_frame().interpreter_frame_verify_monitor(elem); | |
548 #endif | |
549 IRT_END | |
550 | |
551 | |
552 //%note monitor_1 | |
553 IRT_ENTRY_NO_ASYNC(void, InterpreterRuntime::monitorexit(JavaThread* thread, BasicObjectLock* elem)) | |
554 #ifdef ASSERT | |
555 thread->last_frame().interpreter_frame_verify_monitor(elem); | |
556 #endif | |
557 Handle h_obj(thread, elem->obj()); | |
558 assert(Universe::heap()->is_in_reserved_or_null(h_obj()), | |
559 "must be NULL or an object"); | |
560 if (elem == NULL || h_obj()->is_unlocked()) { | |
561 THROW(vmSymbols::java_lang_IllegalMonitorStateException()); | |
562 } | |
563 ObjectSynchronizer::slow_exit(h_obj(), elem->lock(), thread); | |
564 // Free entry. This must be done here, since a pending exception might be installed on | |
565 // exit. If it is not cleared, the exception handling code will try to unlock the monitor again. | |
566 elem->set_obj(NULL); | |
567 #ifdef ASSERT | |
568 thread->last_frame().interpreter_frame_verify_monitor(elem); | |
569 #endif | |
570 IRT_END | |
571 | |
572 | |
573 IRT_ENTRY(void, InterpreterRuntime::throw_illegal_monitor_state_exception(JavaThread* thread)) | |
574 THROW(vmSymbols::java_lang_IllegalMonitorStateException()); | |
575 IRT_END | |
576 | |
577 | |
578 IRT_ENTRY(void, InterpreterRuntime::new_illegal_monitor_state_exception(JavaThread* thread)) | |
579 // Returns an illegal exception to install into the current thread. The | |
580 // pending_exception flag is cleared so normal exception handling does not | |
581 // trigger. Any current installed exception will be overwritten. This | |
582 // method will be called during an exception unwind. | |
583 | |
584 assert(!HAS_PENDING_EXCEPTION, "no pending exception"); | |
585 Handle exception(thread, thread->vm_result()); | |
586 assert(exception() != NULL, "vm result should be set"); | |
587 thread->set_vm_result(NULL); // clear vm result before continuing (may cause memory leaks and assert failures) | |
1142 | 588 if (!exception->is_a(SystemDictionary::ThreadDeath_klass())) { |
0 | 589 exception = get_preinitialized_exception( |
590 SystemDictionary::IllegalMonitorStateException_klass(), | |
591 CATCH); | |
592 } | |
593 thread->set_vm_result(exception()); | |
594 IRT_END | |
595 | |
596 | |
597 //------------------------------------------------------------------------------------------------------------------------ | |
598 // Invokes | |
599 | |
600 IRT_ENTRY(Bytecodes::Code, InterpreterRuntime::get_original_bytecode_at(JavaThread* thread, methodOopDesc* method, address bcp)) | |
601 return method->orig_bytecode_at(method->bci_from(bcp)); | |
602 IRT_END | |
603 | |
604 IRT_ENTRY(void, InterpreterRuntime::set_original_bytecode_at(JavaThread* thread, methodOopDesc* method, address bcp, Bytecodes::Code new_code)) | |
605 method->set_orig_bytecode_at(method->bci_from(bcp), new_code); | |
606 IRT_END | |
607 | |
608 IRT_ENTRY(void, InterpreterRuntime::_breakpoint(JavaThread* thread, methodOopDesc* method, address bcp)) | |
609 JvmtiExport::post_raw_breakpoint(thread, method, bcp); | |
610 IRT_END | |
611 | |
612 IRT_ENTRY(void, InterpreterRuntime::resolve_invoke(JavaThread* thread, Bytecodes::Code bytecode)) | |
613 // extract receiver from the outgoing argument list if necessary | |
614 Handle receiver(thread, NULL); | |
615 if (bytecode == Bytecodes::_invokevirtual || bytecode == Bytecodes::_invokeinterface) { | |
616 ResourceMark rm(thread); | |
617 methodHandle m (thread, method(thread)); | |
618 int bci = m->bci_from(bcp(thread)); | |
619 Bytecode_invoke* call = Bytecode_invoke_at(m, bci); | |
620 symbolHandle signature (thread, call->signature()); | |
621 receiver = Handle(thread, | |
622 thread->last_frame().interpreter_callee_receiver(signature)); | |
623 assert(Universe::heap()->is_in_reserved_or_null(receiver()), | |
624 "sanity check"); | |
625 assert(receiver.is_null() || | |
626 Universe::heap()->is_in_reserved(receiver->klass()), | |
627 "sanity check"); | |
628 } | |
629 | |
630 // resolve method | |
631 CallInfo info; | |
632 constantPoolHandle pool(thread, method(thread)->constants()); | |
633 | |
634 { | |
635 JvmtiHideSingleStepping jhss(thread); | |
636 LinkResolver::resolve_invoke(info, receiver, pool, | |
637 two_byte_index(thread), bytecode, CHECK); | |
638 if (JvmtiExport::can_hotswap_or_post_breakpoint()) { | |
639 int retry_count = 0; | |
640 while (info.resolved_method()->is_old()) { | |
641 // It is very unlikely that method is redefined more than 100 times | |
642 // in the middle of resolve. If it is looping here more than 100 times | |
643 // means then there could be a bug here. | |
644 guarantee((retry_count++ < 100), | |
645 "Could not resolve to latest version of redefined method"); | |
646 // method is redefined in the middle of resolve so re-try. | |
647 LinkResolver::resolve_invoke(info, receiver, pool, | |
648 two_byte_index(thread), bytecode, CHECK); | |
649 } | |
650 } | |
651 } // end JvmtiHideSingleStepping | |
652 | |
653 // check if link resolution caused cpCache to be updated | |
654 if (already_resolved(thread)) return; | |
655 | |
656 if (bytecode == Bytecodes::_invokeinterface) { | |
657 | |
658 if (TraceItables && Verbose) { | |
659 ResourceMark rm(thread); | |
660 tty->print_cr("Resolving: klass: %s to method: %s", info.resolved_klass()->name()->as_C_string(), info.resolved_method()->name()->as_C_string()); | |
661 } | |
662 if (info.resolved_method()->method_holder() == | |
1142 | 663 SystemDictionary::Object_klass()) { |
0 | 664 // NOTE: THIS IS A FIX FOR A CORNER CASE in the JVM spec |
665 // (see also cpCacheOop.cpp for details) | |
666 methodHandle rm = info.resolved_method(); | |
667 assert(rm->is_final() || info.has_vtable_index(), | |
668 "should have been set already"); | |
669 cache_entry(thread)->set_method(bytecode, rm, info.vtable_index()); | |
670 } else { | |
671 // Setup itable entry | |
672 int index = klassItable::compute_itable_index(info.resolved_method()()); | |
673 cache_entry(thread)->set_interface_call(info.resolved_method(), index); | |
674 } | |
675 } else { | |
676 cache_entry(thread)->set_method( | |
677 bytecode, | |
678 info.resolved_method(), | |
679 info.vtable_index()); | |
680 } | |
681 IRT_END | |
682 | |
683 | |
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684 // First time execution: Resolve symbols, create a permanent CallSite object. |
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685 IRT_ENTRY(void, InterpreterRuntime::resolve_invokedynamic(JavaThread* thread)) { |
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686 ResourceMark rm(thread); |
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687 |
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688 assert(EnableInvokeDynamic, ""); |
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689 |
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690 const Bytecodes::Code bytecode = Bytecodes::_invokedynamic; |
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691 |
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692 methodHandle caller_method(thread, method(thread)); |
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693 |
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694 // first determine if there is a bootstrap method |
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695 { |
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696 KlassHandle caller_klass(thread, caller_method->method_holder()); |
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697 Handle bootm = SystemDictionary::find_bootstrap_method(caller_klass, KlassHandle(), CHECK); |
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698 if (bootm.is_null()) { |
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699 // If there is no bootstrap method, throw IncompatibleClassChangeError. |
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700 // This is a valid generic error type for resolution (JLS 12.3.3). |
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701 char buf[200]; |
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702 jio_snprintf(buf, sizeof(buf), "Class %s has not declared a bootstrap method for invokedynamic", |
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703 (Klass::cast(caller_klass()))->external_name()); |
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704 THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(), buf); |
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705 } |
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706 } |
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707 |
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708 constantPoolHandle pool(thread, caller_method->constants()); |
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709 pool->set_invokedynamic(); // mark header to flag active call sites |
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710 |
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711 int site_index = four_byte_index(thread); |
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712 // there is a second CPC entries that is of interest; it caches signature info: |
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713 int main_index = pool->cache()->secondary_entry_at(site_index)->main_entry_index(); |
726
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714 |
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715 // first resolve the signature to a MH.invoke methodOop |
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716 if (!pool->cache()->entry_at(main_index)->is_resolved(bytecode)) { |
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717 JvmtiHideSingleStepping jhss(thread); |
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718 CallInfo info; |
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719 LinkResolver::resolve_invoke(info, Handle(), pool, |
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720 site_index, bytecode, CHECK); |
726
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721 // The main entry corresponds to a JVM_CONSTANT_NameAndType, and serves |
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722 // as a common reference point for all invokedynamic call sites with |
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723 // that exact call descriptor. We will link it in the CP cache exactly |
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724 // as if it were an invokevirtual of MethodHandle.invoke. |
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725 pool->cache()->entry_at(main_index)->set_method( |
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726 bytecode, |
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727 info.resolved_method(), |
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728 info.vtable_index()); |
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729 assert(pool->cache()->entry_at(main_index)->is_vfinal(), "f2 must be a methodOop"); |
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730 } |
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731 |
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732 // The method (f2 entry) of the main entry is the MH.invoke for the |
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733 // invokedynamic target call signature. |
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734 intptr_t f2_value = pool->cache()->entry_at(main_index)->f2(); |
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735 methodHandle mh_invdyn(THREAD, (methodOop) f2_value); |
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736 assert(mh_invdyn.not_null() && mh_invdyn->is_method() && mh_invdyn->is_method_handle_invoke(), |
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737 "correct result from LinkResolver::resolve_invokedynamic"); |
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738 |
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739 symbolHandle call_site_name(THREAD, pool->name_ref_at(site_index)); |
726
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740 Handle call_site |
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741 = SystemDictionary::make_dynamic_call_site(caller_method->method_holder(), |
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742 caller_method->method_idnum(), |
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743 caller_method->bci_from(bcp(thread)), |
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744 call_site_name, |
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745 mh_invdyn, |
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746 CHECK); |
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747 |
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748 // In the secondary entry, the f1 field is the call site, and the f2 (index) |
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749 // field is some data about the invoke site. |
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750 int extra_data = 0; |
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751 pool->cache()->secondary_entry_at(site_index)->set_dynamic_call(call_site(), extra_data); |
726
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752 } |
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753 IRT_END |
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754 |
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755 |
0 | 756 //------------------------------------------------------------------------------------------------------------------------ |
757 // Miscellaneous | |
758 | |
759 | |
760 #ifndef PRODUCT | |
761 static void trace_frequency_counter_overflow(methodHandle m, int branch_bci, int bci, address branch_bcp) { | |
762 if (TraceInvocationCounterOverflow) { | |
763 InvocationCounter* ic = m->invocation_counter(); | |
764 InvocationCounter* bc = m->backedge_counter(); | |
765 ResourceMark rm; | |
766 const char* msg = | |
767 branch_bcp == NULL | |
768 ? "comp-policy cntr ovfl @ %d in entry of " | |
769 : "comp-policy cntr ovfl @ %d in loop of "; | |
770 tty->print(msg, bci); | |
771 m->print_value(); | |
772 tty->cr(); | |
773 ic->print(); | |
774 bc->print(); | |
775 if (ProfileInterpreter) { | |
776 if (branch_bcp != NULL) { | |
777 methodDataOop mdo = m->method_data(); | |
778 if (mdo != NULL) { | |
779 int count = mdo->bci_to_data(branch_bci)->as_JumpData()->taken(); | |
780 tty->print_cr("back branch count = %d", count); | |
781 } | |
782 } | |
783 } | |
784 } | |
785 } | |
786 | |
787 static void trace_osr_request(methodHandle method, nmethod* osr, int bci) { | |
788 if (TraceOnStackReplacement) { | |
789 ResourceMark rm; | |
790 tty->print(osr != NULL ? "Reused OSR entry for " : "Requesting OSR entry for "); | |
791 method->print_short_name(tty); | |
792 tty->print_cr(" at bci %d", bci); | |
793 } | |
794 } | |
795 #endif // !PRODUCT | |
796 | |
941 | 797 nmethod* InterpreterRuntime::frequency_counter_overflow(JavaThread* thread, address branch_bcp) { |
798 nmethod* nm = frequency_counter_overflow_inner(thread, branch_bcp); | |
799 assert(branch_bcp != NULL || nm == NULL, "always returns null for non OSR requests"); | |
800 if (branch_bcp != NULL && nm != NULL) { | |
801 // This was a successful request for an OSR nmethod. Because | |
802 // frequency_counter_overflow_inner ends with a safepoint check, | |
803 // nm could have been unloaded so look it up again. It's unsafe | |
804 // to examine nm directly since it might have been freed and used | |
805 // for something else. | |
806 frame fr = thread->last_frame(); | |
807 methodOop method = fr.interpreter_frame_method(); | |
808 int bci = method->bci_from(fr.interpreter_frame_bcp()); | |
809 nm = method->lookup_osr_nmethod_for(bci); | |
810 } | |
811 return nm; | |
812 } | |
813 | |
0 | 814 IRT_ENTRY(nmethod*, |
941 | 815 InterpreterRuntime::frequency_counter_overflow_inner(JavaThread* thread, address branch_bcp)) |
0 | 816 // use UnlockFlagSaver to clear and restore the _do_not_unlock_if_synchronized |
817 // flag, in case this method triggers classloading which will call into Java. | |
818 UnlockFlagSaver fs(thread); | |
819 | |
820 frame fr = thread->last_frame(); | |
821 assert(fr.is_interpreted_frame(), "must come from interpreter"); | |
822 methodHandle method(thread, fr.interpreter_frame_method()); | |
823 const int branch_bci = branch_bcp != NULL ? method->bci_from(branch_bcp) : 0; | |
824 const int bci = method->bci_from(fr.interpreter_frame_bcp()); | |
825 NOT_PRODUCT(trace_frequency_counter_overflow(method, branch_bci, bci, branch_bcp);) | |
826 | |
827 if (JvmtiExport::can_post_interpreter_events()) { | |
828 if (thread->is_interp_only_mode()) { | |
829 // If certain JVMTI events (e.g. frame pop event) are requested then the | |
830 // thread is forced to remain in interpreted code. This is | |
831 // implemented partly by a check in the run_compiled_code | |
832 // section of the interpreter whether we should skip running | |
833 // compiled code, and partly by skipping OSR compiles for | |
834 // interpreted-only threads. | |
835 if (branch_bcp != NULL) { | |
836 CompilationPolicy::policy()->reset_counter_for_back_branch_event(method); | |
837 return NULL; | |
838 } | |
839 } | |
840 } | |
841 | |
842 if (branch_bcp == NULL) { | |
843 // when code cache is full, compilation gets switched off, UseCompiler | |
844 // is set to false | |
845 if (!method->has_compiled_code() && UseCompiler) { | |
846 CompilationPolicy::policy()->method_invocation_event(method, CHECK_NULL); | |
847 } else { | |
848 // Force counter overflow on method entry, even if no compilation | |
849 // happened. (The method_invocation_event call does this also.) | |
850 CompilationPolicy::policy()->reset_counter_for_invocation_event(method); | |
851 } | |
852 // compilation at an invocation overflow no longer goes and retries test for | |
853 // compiled method. We always run the loser of the race as interpreted. | |
854 // so return NULL | |
855 return NULL; | |
856 } else { | |
857 // counter overflow in a loop => try to do on-stack-replacement | |
858 nmethod* osr_nm = method->lookup_osr_nmethod_for(bci); | |
859 NOT_PRODUCT(trace_osr_request(method, osr_nm, bci);) | |
860 // when code cache is full, we should not compile any more... | |
861 if (osr_nm == NULL && UseCompiler) { | |
862 const int branch_bci = method->bci_from(branch_bcp); | |
863 CompilationPolicy::policy()->method_back_branch_event(method, branch_bci, bci, CHECK_NULL); | |
864 osr_nm = method->lookup_osr_nmethod_for(bci); | |
865 } | |
866 if (osr_nm == NULL) { | |
867 CompilationPolicy::policy()->reset_counter_for_back_branch_event(method); | |
868 return NULL; | |
869 } else { | |
870 // We may need to do on-stack replacement which requires that no | |
871 // monitors in the activation are biased because their | |
872 // BasicObjectLocks will need to migrate during OSR. Force | |
873 // unbiasing of all monitors in the activation now (even though | |
874 // the OSR nmethod might be invalidated) because we don't have a | |
875 // safepoint opportunity later once the migration begins. | |
876 if (UseBiasedLocking) { | |
877 ResourceMark rm; | |
878 GrowableArray<Handle>* objects_to_revoke = new GrowableArray<Handle>(); | |
879 for( BasicObjectLock *kptr = fr.interpreter_frame_monitor_end(); | |
880 kptr < fr.interpreter_frame_monitor_begin(); | |
881 kptr = fr.next_monitor_in_interpreter_frame(kptr) ) { | |
882 if( kptr->obj() != NULL ) { | |
883 objects_to_revoke->append(Handle(THREAD, kptr->obj())); | |
884 } | |
885 } | |
886 BiasedLocking::revoke(objects_to_revoke); | |
887 } | |
888 return osr_nm; | |
889 } | |
890 } | |
891 IRT_END | |
892 | |
893 IRT_LEAF(jint, InterpreterRuntime::bcp_to_di(methodOopDesc* method, address cur_bcp)) | |
894 assert(ProfileInterpreter, "must be profiling interpreter"); | |
895 int bci = method->bci_from(cur_bcp); | |
896 methodDataOop mdo = method->method_data(); | |
897 if (mdo == NULL) return 0; | |
898 return mdo->bci_to_di(bci); | |
899 IRT_END | |
900 | |
901 IRT_ENTRY(jint, InterpreterRuntime::profile_method(JavaThread* thread, address cur_bcp)) | |
902 // use UnlockFlagSaver to clear and restore the _do_not_unlock_if_synchronized | |
903 // flag, in case this method triggers classloading which will call into Java. | |
904 UnlockFlagSaver fs(thread); | |
905 | |
906 assert(ProfileInterpreter, "must be profiling interpreter"); | |
907 frame fr = thread->last_frame(); | |
908 assert(fr.is_interpreted_frame(), "must come from interpreter"); | |
909 methodHandle method(thread, fr.interpreter_frame_method()); | |
910 int bci = method->bci_from(cur_bcp); | |
911 methodOopDesc::build_interpreter_method_data(method, THREAD); | |
912 if (HAS_PENDING_EXCEPTION) { | |
913 assert((PENDING_EXCEPTION->is_a(SystemDictionary::OutOfMemoryError_klass())), "we expect only an OOM error here"); | |
914 CLEAR_PENDING_EXCEPTION; | |
915 // and fall through... | |
916 } | |
917 methodDataOop mdo = method->method_data(); | |
918 if (mdo == NULL) return 0; | |
919 return mdo->bci_to_di(bci); | |
920 IRT_END | |
921 | |
922 | |
923 #ifdef ASSERT | |
924 IRT_LEAF(void, InterpreterRuntime::verify_mdp(methodOopDesc* method, address bcp, address mdp)) | |
925 assert(ProfileInterpreter, "must be profiling interpreter"); | |
926 | |
927 methodDataOop mdo = method->method_data(); | |
928 assert(mdo != NULL, "must not be null"); | |
929 | |
930 int bci = method->bci_from(bcp); | |
931 | |
932 address mdp2 = mdo->bci_to_dp(bci); | |
933 if (mdp != mdp2) { | |
934 ResourceMark rm; | |
935 ResetNoHandleMark rnm; // In a LEAF entry. | |
936 HandleMark hm; | |
937 tty->print_cr("FAILED verify : actual mdp %p expected mdp %p @ bci %d", mdp, mdp2, bci); | |
938 int current_di = mdo->dp_to_di(mdp); | |
939 int expected_di = mdo->dp_to_di(mdp2); | |
940 tty->print_cr(" actual di %d expected di %d", current_di, expected_di); | |
941 int expected_approx_bci = mdo->data_at(expected_di)->bci(); | |
942 int approx_bci = -1; | |
943 if (current_di >= 0) { | |
944 approx_bci = mdo->data_at(current_di)->bci(); | |
945 } | |
946 tty->print_cr(" actual bci is %d expected bci %d", approx_bci, expected_approx_bci); | |
947 mdo->print_on(tty); | |
948 method->print_codes(); | |
949 } | |
950 assert(mdp == mdp2, "wrong mdp"); | |
951 IRT_END | |
952 #endif // ASSERT | |
953 | |
954 IRT_ENTRY(void, InterpreterRuntime::update_mdp_for_ret(JavaThread* thread, int return_bci)) | |
955 assert(ProfileInterpreter, "must be profiling interpreter"); | |
956 ResourceMark rm(thread); | |
957 HandleMark hm(thread); | |
958 frame fr = thread->last_frame(); | |
959 assert(fr.is_interpreted_frame(), "must come from interpreter"); | |
960 methodDataHandle h_mdo(thread, fr.interpreter_frame_method()->method_data()); | |
961 | |
962 // Grab a lock to ensure atomic access to setting the return bci and | |
963 // the displacement. This can block and GC, invalidating all naked oops. | |
964 MutexLocker ml(RetData_lock); | |
965 | |
966 // ProfileData is essentially a wrapper around a derived oop, so we | |
967 // need to take the lock before making any ProfileData structures. | |
968 ProfileData* data = h_mdo->data_at(h_mdo->dp_to_di(fr.interpreter_frame_mdp())); | |
969 RetData* rdata = data->as_RetData(); | |
970 address new_mdp = rdata->fixup_ret(return_bci, h_mdo); | |
971 fr.interpreter_frame_set_mdp(new_mdp); | |
972 IRT_END | |
973 | |
974 | |
975 IRT_ENTRY(void, InterpreterRuntime::at_safepoint(JavaThread* thread)) | |
976 // We used to need an explict preserve_arguments here for invoke bytecodes. However, | |
977 // stack traversal automatically takes care of preserving arguments for invoke, so | |
978 // this is no longer needed. | |
979 | |
980 // IRT_END does an implicit safepoint check, hence we are guaranteed to block | |
981 // if this is called during a safepoint | |
982 | |
983 if (JvmtiExport::should_post_single_step()) { | |
984 // We are called during regular safepoints and when the VM is | |
985 // single stepping. If any thread is marked for single stepping, | |
986 // then we may have JVMTI work to do. | |
987 JvmtiExport::at_single_stepping_point(thread, method(thread), bcp(thread)); | |
988 } | |
989 IRT_END | |
990 | |
991 IRT_ENTRY(void, InterpreterRuntime::post_field_access(JavaThread *thread, oopDesc* obj, | |
992 ConstantPoolCacheEntry *cp_entry)) | |
993 | |
994 // check the access_flags for the field in the klass | |
995 instanceKlass* ik = instanceKlass::cast((klassOop)cp_entry->f1()); | |
996 typeArrayOop fields = ik->fields(); | |
997 int index = cp_entry->field_index(); | |
998 assert(index < fields->length(), "holders field index is out of range"); | |
999 // bail out if field accesses are not watched | |
1000 if ((fields->ushort_at(index) & JVM_ACC_FIELD_ACCESS_WATCHED) == 0) return; | |
1001 | |
1002 switch(cp_entry->flag_state()) { | |
1003 case btos: // fall through | |
1004 case ctos: // fall through | |
1005 case stos: // fall through | |
1006 case itos: // fall through | |
1007 case ftos: // fall through | |
1008 case ltos: // fall through | |
1009 case dtos: // fall through | |
1010 case atos: break; | |
1011 default: ShouldNotReachHere(); return; | |
1012 } | |
1013 bool is_static = (obj == NULL); | |
1014 HandleMark hm(thread); | |
1015 | |
1016 Handle h_obj; | |
1017 if (!is_static) { | |
1018 // non-static field accessors have an object, but we need a handle | |
1019 h_obj = Handle(thread, obj); | |
1020 } | |
1021 instanceKlassHandle h_cp_entry_f1(thread, (klassOop)cp_entry->f1()); | |
1022 jfieldID fid = jfieldIDWorkaround::to_jfieldID(h_cp_entry_f1, cp_entry->f2(), is_static); | |
1023 JvmtiExport::post_field_access(thread, method(thread), bcp(thread), h_cp_entry_f1, h_obj, fid); | |
1024 IRT_END | |
1025 | |
1026 IRT_ENTRY(void, InterpreterRuntime::post_field_modification(JavaThread *thread, | |
1027 oopDesc* obj, ConstantPoolCacheEntry *cp_entry, jvalue *value)) | |
1028 | |
1029 klassOop k = (klassOop)cp_entry->f1(); | |
1030 | |
1031 // check the access_flags for the field in the klass | |
1032 instanceKlass* ik = instanceKlass::cast(k); | |
1033 typeArrayOop fields = ik->fields(); | |
1034 int index = cp_entry->field_index(); | |
1035 assert(index < fields->length(), "holders field index is out of range"); | |
1036 // bail out if field modifications are not watched | |
1037 if ((fields->ushort_at(index) & JVM_ACC_FIELD_MODIFICATION_WATCHED) == 0) return; | |
1038 | |
1039 char sig_type = '\0'; | |
1040 | |
1041 switch(cp_entry->flag_state()) { | |
1042 case btos: sig_type = 'Z'; break; | |
1043 case ctos: sig_type = 'C'; break; | |
1044 case stos: sig_type = 'S'; break; | |
1045 case itos: sig_type = 'I'; break; | |
1046 case ftos: sig_type = 'F'; break; | |
1047 case atos: sig_type = 'L'; break; | |
1048 case ltos: sig_type = 'J'; break; | |
1049 case dtos: sig_type = 'D'; break; | |
1050 default: ShouldNotReachHere(); return; | |
1051 } | |
1052 bool is_static = (obj == NULL); | |
1053 | |
1054 HandleMark hm(thread); | |
1055 instanceKlassHandle h_klass(thread, k); | |
1056 jfieldID fid = jfieldIDWorkaround::to_jfieldID(h_klass, cp_entry->f2(), is_static); | |
1057 jvalue fvalue; | |
1058 #ifdef _LP64 | |
1059 fvalue = *value; | |
1060 #else | |
1061 // Long/double values are stored unaligned and also noncontiguously with | |
1062 // tagged stacks. We can't just do a simple assignment even in the non- | |
1063 // J/D cases because a C++ compiler is allowed to assume that a jvalue is | |
1064 // 8-byte aligned, and interpreter stack slots are only 4-byte aligned. | |
1065 // We assume that the two halves of longs/doubles are stored in interpreter | |
1066 // stack slots in platform-endian order. | |
1067 jlong_accessor u; | |
1068 jint* newval = (jint*)value; | |
1069 u.words[0] = newval[0]; | |
1070 u.words[1] = newval[Interpreter::stackElementWords()]; // skip if tag | |
1071 fvalue.j = u.long_value; | |
1072 #endif // _LP64 | |
1073 | |
1074 Handle h_obj; | |
1075 if (!is_static) { | |
1076 // non-static field accessors have an object, but we need a handle | |
1077 h_obj = Handle(thread, obj); | |
1078 } | |
1079 | |
1080 JvmtiExport::post_raw_field_modification(thread, method(thread), bcp(thread), h_klass, h_obj, | |
1081 fid, sig_type, &fvalue); | |
1082 IRT_END | |
1083 | |
1084 IRT_ENTRY(void, InterpreterRuntime::post_method_entry(JavaThread *thread)) | |
1085 JvmtiExport::post_method_entry(thread, InterpreterRuntime::method(thread), InterpreterRuntime::last_frame(thread)); | |
1086 IRT_END | |
1087 | |
1088 | |
1089 IRT_ENTRY(void, InterpreterRuntime::post_method_exit(JavaThread *thread)) | |
1090 JvmtiExport::post_method_exit(thread, InterpreterRuntime::method(thread), InterpreterRuntime::last_frame(thread)); | |
1091 IRT_END | |
1092 | |
1093 IRT_LEAF(int, InterpreterRuntime::interpreter_contains(address pc)) | |
1094 { | |
1095 return (Interpreter::contains(pc) ? 1 : 0); | |
1096 } | |
1097 IRT_END | |
1098 | |
1099 | |
1100 // Implementation of SignatureHandlerLibrary | |
1101 | |
1102 address SignatureHandlerLibrary::set_handler_blob() { | |
1103 BufferBlob* handler_blob = BufferBlob::create("native signature handlers", blob_size); | |
1104 if (handler_blob == NULL) { | |
1105 return NULL; | |
1106 } | |
1107 address handler = handler_blob->instructions_begin(); | |
1108 _handler_blob = handler_blob; | |
1109 _handler = handler; | |
1110 return handler; | |
1111 } | |
1112 | |
1113 void SignatureHandlerLibrary::initialize() { | |
1114 if (_fingerprints != NULL) { | |
1115 return; | |
1116 } | |
1117 if (set_handler_blob() == NULL) { | |
1118 vm_exit_out_of_memory(blob_size, "native signature handlers"); | |
1119 } | |
1120 | |
1121 BufferBlob* bb = BufferBlob::create("Signature Handler Temp Buffer", | |
1122 SignatureHandlerLibrary::buffer_size); | |
1123 _buffer = bb->instructions_begin(); | |
1124 | |
1125 _fingerprints = new(ResourceObj::C_HEAP)GrowableArray<uint64_t>(32, true); | |
1126 _handlers = new(ResourceObj::C_HEAP)GrowableArray<address>(32, true); | |
1127 } | |
1128 | |
1129 address SignatureHandlerLibrary::set_handler(CodeBuffer* buffer) { | |
1130 address handler = _handler; | |
1131 int code_size = buffer->pure_code_size(); | |
1132 if (handler + code_size > _handler_blob->instructions_end()) { | |
1133 // get a new handler blob | |
1134 handler = set_handler_blob(); | |
1135 } | |
1136 if (handler != NULL) { | |
1137 memcpy(handler, buffer->code_begin(), code_size); | |
1138 pd_set_handler(handler); | |
1139 ICache::invalidate_range(handler, code_size); | |
1140 _handler = handler + code_size; | |
1141 } | |
1142 return handler; | |
1143 } | |
1144 | |
1145 void SignatureHandlerLibrary::add(methodHandle method) { | |
1146 if (method->signature_handler() == NULL) { | |
1147 // use slow signature handler if we can't do better | |
1148 int handler_index = -1; | |
1149 // check if we can use customized (fast) signature handler | |
1150 if (UseFastSignatureHandlers && method->size_of_parameters() <= Fingerprinter::max_size_of_parameters) { | |
1151 // use customized signature handler | |
1152 MutexLocker mu(SignatureHandlerLibrary_lock); | |
1153 // make sure data structure is initialized | |
1154 initialize(); | |
1155 // lookup method signature's fingerprint | |
1156 uint64_t fingerprint = Fingerprinter(method).fingerprint(); | |
1157 handler_index = _fingerprints->find(fingerprint); | |
1158 // create handler if necessary | |
1159 if (handler_index < 0) { | |
1160 ResourceMark rm; | |
1161 ptrdiff_t align_offset = (address) | |
1162 round_to((intptr_t)_buffer, CodeEntryAlignment) - (address)_buffer; | |
1163 CodeBuffer buffer((address)(_buffer + align_offset), | |
1164 SignatureHandlerLibrary::buffer_size - align_offset); | |
1165 InterpreterRuntime::SignatureHandlerGenerator(method, &buffer).generate(fingerprint); | |
1166 // copy into code heap | |
1167 address handler = set_handler(&buffer); | |
1168 if (handler == NULL) { | |
1169 // use slow signature handler | |
1170 } else { | |
1171 // debugging suppport | |
1172 if (PrintSignatureHandlers) { | |
1173 tty->cr(); | |
1174 tty->print_cr("argument handler #%d for: %s %s (fingerprint = " UINT64_FORMAT ", %d bytes generated)", | |
1175 _handlers->length(), | |
1176 (method->is_static() ? "static" : "receiver"), | |
1177 method->name_and_sig_as_C_string(), | |
1178 fingerprint, | |
1179 buffer.code_size()); | |
1180 Disassembler::decode(handler, handler + buffer.code_size()); | |
1181 #ifndef PRODUCT | |
1182 tty->print_cr(" --- associated result handler ---"); | |
1183 address rh_begin = Interpreter::result_handler(method()->result_type()); | |
1184 address rh_end = rh_begin; | |
1185 while (*(int*)rh_end != 0) { | |
1186 rh_end += sizeof(int); | |
1187 } | |
1188 Disassembler::decode(rh_begin, rh_end); | |
1189 #endif | |
1190 } | |
1191 // add handler to library | |
1192 _fingerprints->append(fingerprint); | |
1193 _handlers->append(handler); | |
1194 // set handler index | |
1195 assert(_fingerprints->length() == _handlers->length(), "sanity check"); | |
1196 handler_index = _fingerprints->length() - 1; | |
1197 } | |
1198 } | |
1199 } else { | |
1200 CHECK_UNHANDLED_OOPS_ONLY(Thread::current()->clear_unhandled_oops()); | |
1201 } | |
1202 if (handler_index < 0) { | |
1203 // use generic signature handler | |
1204 method->set_signature_handler(Interpreter::slow_signature_handler()); | |
1205 } else { | |
1206 // set handler | |
1207 method->set_signature_handler(_handlers->at(handler_index)); | |
1208 } | |
1209 } | |
1210 assert(method->signature_handler() == Interpreter::slow_signature_handler() || | |
1211 _handlers->find(method->signature_handler()) == _fingerprints->find(Fingerprinter(method).fingerprint()), | |
1212 "sanity check"); | |
1213 } | |
1214 | |
1215 | |
1216 BufferBlob* SignatureHandlerLibrary::_handler_blob = NULL; | |
1217 address SignatureHandlerLibrary::_handler = NULL; | |
1218 GrowableArray<uint64_t>* SignatureHandlerLibrary::_fingerprints = NULL; | |
1219 GrowableArray<address>* SignatureHandlerLibrary::_handlers = NULL; | |
1220 address SignatureHandlerLibrary::_buffer = NULL; | |
1221 | |
1222 | |
1223 IRT_ENTRY(void, InterpreterRuntime::prepare_native_call(JavaThread* thread, methodOopDesc* method)) | |
1224 methodHandle m(thread, method); | |
1225 assert(m->is_native(), "sanity check"); | |
1226 // lookup native function entry point if it doesn't exist | |
1227 bool in_base_library; | |
1228 if (!m->has_native_function()) { | |
1229 NativeLookup::lookup(m, in_base_library, CHECK); | |
1230 } | |
1231 // make sure signature handler is installed | |
1232 SignatureHandlerLibrary::add(m); | |
1233 // The interpreter entry point checks the signature handler first, | |
1234 // before trying to fetch the native entry point and klass mirror. | |
1235 // We must set the signature handler last, so that multiple processors | |
1236 // preparing the same method will be sure to see non-null entry & mirror. | |
1237 IRT_END | |
1238 | |
1239 #if defined(IA32) || defined(AMD64) | |
1240 IRT_LEAF(void, InterpreterRuntime::popframe_move_outgoing_args(JavaThread* thread, void* src_address, void* dest_address)) | |
1241 if (src_address == dest_address) { | |
1242 return; | |
1243 } | |
1244 ResetNoHandleMark rnm; // In a LEAF entry. | |
1245 HandleMark hm; | |
1246 ResourceMark rm; | |
1247 frame fr = thread->last_frame(); | |
1248 assert(fr.is_interpreted_frame(), ""); | |
1249 jint bci = fr.interpreter_frame_bci(); | |
1250 methodHandle mh(thread, fr.interpreter_frame_method()); | |
1251 Bytecode_invoke* invoke = Bytecode_invoke_at(mh, bci); | |
1252 ArgumentSizeComputer asc(invoke->signature()); | |
1138
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1253 int size_of_arguments = (asc.size() + (invoke->has_receiver() ? 1 : 0)); // receiver |
0 | 1254 Copy::conjoint_bytes(src_address, dest_address, |
1255 size_of_arguments * Interpreter::stackElementSize()); | |
1256 IRT_END | |
1257 #endif |