1 /*
2 * Copyright (c) 1997, 2015, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
23 */
24
25 #include "precompiled.hpp"
26 #include "classfile/javaClasses.inline.hpp"
27 #include "classfile/systemDictionary.hpp"
28 #include "classfile/vmSymbols.hpp"
29 #include "code/codeCache.hpp"
30 #include "code/codeCacheExtensions.hpp"
31 #include "compiler/compileBroker.hpp"
32 #include "compiler/disassembler.hpp"
33 #include "gc/shared/collectedHeap.hpp"
34 #include "interpreter/interpreter.hpp"
35 #include "interpreter/interpreterRuntime.hpp"
36 #include "interpreter/linkResolver.hpp"
37 #include "interpreter/templateTable.hpp"
38 #include "logging/log.hpp"
39 #include "memory/oopFactory.hpp"
40 #include "memory/universe.inline.hpp"
41 #include "oops/constantPool.hpp"
42 #include "oops/instanceKlass.hpp"
43 #include "oops/methodData.hpp"
44 #include "oops/objArrayKlass.hpp"
45 #include "oops/objArrayOop.inline.hpp"
46 #include "oops/oop.inline.hpp"
47 #include "oops/symbol.hpp"
48 #include "prims/jvmtiExport.hpp"
49 #include "prims/nativeLookup.hpp"
50 #include "runtime/atomic.inline.hpp"
51 #include "runtime/biasedLocking.hpp"
52 #include "runtime/compilationPolicy.hpp"
53 #include "runtime/deoptimization.hpp"
54 #include "runtime/fieldDescriptor.hpp"
55 #include "runtime/handles.inline.hpp"
56 #include "runtime/icache.hpp"
57 #include "runtime/interfaceSupport.hpp"
58 #include "runtime/java.hpp"
59 #include "runtime/jfieldIDWorkaround.hpp"
60 #include "runtime/osThread.hpp"
61 #include "runtime/sharedRuntime.hpp"
62 #include "runtime/stubRoutines.hpp"
63 #include "runtime/synchronizer.hpp"
64 #include "runtime/threadCritical.hpp"
65 #include "utilities/events.hpp"
66 #ifdef COMPILER2
67 #include "opto/runtime.hpp"
68 #endif
69
70 class UnlockFlagSaver {
71 private:
72 JavaThread* _thread;
73 bool _do_not_unlock;
74 public:
75 UnlockFlagSaver(JavaThread* t) {
76 _thread = t;
77 _do_not_unlock = t->do_not_unlock_if_synchronized();
78 t->set_do_not_unlock_if_synchronized(false);
79 }
80 ~UnlockFlagSaver() {
81 _thread->set_do_not_unlock_if_synchronized(_do_not_unlock);
82 }
83 };
84
85 //------------------------------------------------------------------------------------------------------------------------
86 // State accessors
87
88 void InterpreterRuntime::set_bcp_and_mdp(address bcp, JavaThread *thread) {
89 last_frame(thread).interpreter_frame_set_bcp(bcp);
90 if (ProfileInterpreter) {
91 // ProfileTraps uses MDOs independently of ProfileInterpreter.
92 // That is why we must check both ProfileInterpreter and mdo != NULL.
93 MethodData* mdo = last_frame(thread).interpreter_frame_method()->method_data();
94 if (mdo != NULL) {
95 NEEDS_CLEANUP;
96 last_frame(thread).interpreter_frame_set_mdp(mdo->bci_to_dp(last_frame(thread).interpreter_frame_bci()));
97 }
98 }
99 }
100
101 //------------------------------------------------------------------------------------------------------------------------
102 // Constants
103
104
105 IRT_ENTRY(void, InterpreterRuntime::ldc(JavaThread* thread, bool wide))
106 // access constant pool
107 ConstantPool* pool = method(thread)->constants();
108 int index = wide ? get_index_u2(thread, Bytecodes::_ldc_w) : get_index_u1(thread, Bytecodes::_ldc);
109 constantTag tag = pool->tag_at(index);
110
111 assert (tag.is_unresolved_klass() || tag.is_klass(), "wrong ldc call");
112 Klass* klass = pool->klass_at(index, CHECK);
113 oop java_class = klass->java_mirror();
114 thread->set_vm_result(java_class);
115 IRT_END
116
117 IRT_ENTRY(void, InterpreterRuntime::resolve_ldc(JavaThread* thread, Bytecodes::Code bytecode)) {
118 assert(bytecode == Bytecodes::_fast_aldc ||
119 bytecode == Bytecodes::_fast_aldc_w, "wrong bc");
120 ResourceMark rm(thread);
121 methodHandle m (thread, method(thread));
122 Bytecode_loadconstant ldc(m, bci(thread));
123 oop result = ldc.resolve_constant(CHECK);
124 #ifdef ASSERT
125 {
126 // The bytecode wrappers aren't GC-safe so construct a new one
127 Bytecode_loadconstant ldc2(m, bci(thread));
128 oop coop = m->constants()->resolved_references()->obj_at(ldc2.cache_index());
129 assert(result == coop, "expected result for assembly code");
130 }
131 #endif
132 thread->set_vm_result(result);
133 }
134 IRT_END
135
136
137 //------------------------------------------------------------------------------------------------------------------------
138 // Allocation
139
140 IRT_ENTRY(void, InterpreterRuntime::_new(JavaThread* thread, ConstantPool* pool, int index))
141 Klass* k_oop = pool->klass_at(index, CHECK);
142 instanceKlassHandle klass (THREAD, k_oop);
143
144 // Make sure we are not instantiating an abstract klass
145 klass->check_valid_for_instantiation(true, CHECK);
146
147 // Make sure klass is initialized
148 klass->initialize(CHECK);
149
150 // At this point the class may not be fully initialized
151 // because of recursive initialization. If it is fully
152 // initialized & has_finalized is not set, we rewrite
153 // it into its fast version (Note: no locking is needed
154 // here since this is an atomic byte write and can be
155 // done more than once).
156 //
157 // Note: In case of classes with has_finalized we don't
158 // rewrite since that saves us an extra check in
159 // the fast version which then would call the
160 // slow version anyway (and do a call back into
161 // Java).
162 // If we have a breakpoint, then we don't rewrite
163 // because the _breakpoint bytecode would be lost.
164 oop obj = klass->allocate_instance(CHECK);
165 thread->set_vm_result(obj);
166 IRT_END
167
168
169 IRT_ENTRY(void, InterpreterRuntime::newarray(JavaThread* thread, BasicType type, jint size))
170 oop obj = oopFactory::new_typeArray(type, size, CHECK);
171 thread->set_vm_result(obj);
172 IRT_END
173
174
175 IRT_ENTRY(void, InterpreterRuntime::anewarray(JavaThread* thread, ConstantPool* pool, int index, jint size))
176 // Note: no oopHandle for pool & klass needed since they are not used
177 // anymore after new_objArray() and no GC can happen before.
178 // (This may have to change if this code changes!)
179 Klass* klass = pool->klass_at(index, CHECK);
180 objArrayOop obj = oopFactory::new_objArray(klass, size, CHECK);
181 thread->set_vm_result(obj);
182 IRT_END
183
184
185 IRT_ENTRY(void, InterpreterRuntime::multianewarray(JavaThread* thread, jint* first_size_address))
186 // We may want to pass in more arguments - could make this slightly faster
187 ConstantPool* constants = method(thread)->constants();
188 int i = get_index_u2(thread, Bytecodes::_multianewarray);
189 Klass* klass = constants->klass_at(i, CHECK);
190 int nof_dims = number_of_dimensions(thread);
191 assert(klass->is_klass(), "not a class");
192 assert(nof_dims >= 1, "multianewarray rank must be nonzero");
193
194 // We must create an array of jints to pass to multi_allocate.
195 ResourceMark rm(thread);
196 const int small_dims = 10;
197 jint dim_array[small_dims];
198 jint *dims = &dim_array[0];
199 if (nof_dims > small_dims) {
200 dims = (jint*) NEW_RESOURCE_ARRAY(jint, nof_dims);
201 }
202 for (int index = 0; index < nof_dims; index++) {
203 // offset from first_size_address is addressed as local[index]
204 int n = Interpreter::local_offset_in_bytes(index)/jintSize;
205 dims[index] = first_size_address[n];
206 }
207 oop obj = ArrayKlass::cast(klass)->multi_allocate(nof_dims, dims, CHECK);
208 thread->set_vm_result(obj);
209 IRT_END
210
211
212 IRT_ENTRY(void, InterpreterRuntime::register_finalizer(JavaThread* thread, oopDesc* obj))
213 assert(obj->is_oop(), "must be a valid oop");
214 assert(obj->klass()->has_finalizer(), "shouldn't be here otherwise");
215 InstanceKlass::register_finalizer(instanceOop(obj), CHECK);
216 IRT_END
217
218
219 // Quicken instance-of and check-cast bytecodes
220 IRT_ENTRY(void, InterpreterRuntime::quicken_io_cc(JavaThread* thread))
221 // Force resolving; quicken the bytecode
222 int which = get_index_u2(thread, Bytecodes::_checkcast);
223 ConstantPool* cpool = method(thread)->constants();
224 // We'd expect to assert that we're only here to quicken bytecodes, but in a multithreaded
225 // program we might have seen an unquick'd bytecode in the interpreter but have another
226 // thread quicken the bytecode before we get here.
227 // assert( cpool->tag_at(which).is_unresolved_klass(), "should only come here to quicken bytecodes" );
228 Klass* klass = cpool->klass_at(which, CHECK);
229 thread->set_vm_result_2(klass);
230 IRT_END
231
232
233 //------------------------------------------------------------------------------------------------------------------------
234 // Exceptions
235
236 void InterpreterRuntime::note_trap_inner(JavaThread* thread, int reason,
237 methodHandle trap_method, int trap_bci, TRAPS) {
238 if (trap_method.not_null()) {
239 MethodData* trap_mdo = trap_method->method_data();
240 if (trap_mdo == NULL) {
241 Method::build_interpreter_method_data(trap_method, THREAD);
242 if (HAS_PENDING_EXCEPTION) {
243 assert((PENDING_EXCEPTION->is_a(SystemDictionary::OutOfMemoryError_klass())),
244 "we expect only an OOM error here");
245 CLEAR_PENDING_EXCEPTION;
246 }
247 trap_mdo = trap_method->method_data();
248 // and fall through...
249 }
250 if (trap_mdo != NULL) {
251 // Update per-method count of trap events. The interpreter
252 // is updating the MDO to simulate the effect of compiler traps.
253 Deoptimization::update_method_data_from_interpreter(trap_mdo, trap_bci, reason);
254 }
255 }
256 }
257
258 // Assume the compiler is (or will be) interested in this event.
259 // If necessary, create an MDO to hold the information, and record it.
260 void InterpreterRuntime::note_trap(JavaThread* thread, int reason, TRAPS) {
261 assert(ProfileTraps, "call me only if profiling");
262 methodHandle trap_method(thread, method(thread));
263 int trap_bci = trap_method->bci_from(bcp(thread));
264 note_trap_inner(thread, reason, trap_method, trap_bci, THREAD);
265 }
266
267 #ifdef CC_INTERP
268 // As legacy note_trap, but we have more arguments.
269 IRT_ENTRY(void, InterpreterRuntime::note_trap(JavaThread* thread, int reason, Method *method, int trap_bci))
270 methodHandle trap_method(method);
271 note_trap_inner(thread, reason, trap_method, trap_bci, THREAD);
272 IRT_END
273
274 // Class Deoptimization is not visible in BytecodeInterpreter, so we need a wrapper
275 // for each exception.
276 void InterpreterRuntime::note_nullCheck_trap(JavaThread* thread, Method *method, int trap_bci)
277 { if (ProfileTraps) note_trap(thread, Deoptimization::Reason_null_check, method, trap_bci); }
278 void InterpreterRuntime::note_div0Check_trap(JavaThread* thread, Method *method, int trap_bci)
279 { if (ProfileTraps) note_trap(thread, Deoptimization::Reason_div0_check, method, trap_bci); }
280 void InterpreterRuntime::note_rangeCheck_trap(JavaThread* thread, Method *method, int trap_bci)
281 { if (ProfileTraps) note_trap(thread, Deoptimization::Reason_range_check, method, trap_bci); }
282 void InterpreterRuntime::note_classCheck_trap(JavaThread* thread, Method *method, int trap_bci)
283 { if (ProfileTraps) note_trap(thread, Deoptimization::Reason_class_check, method, trap_bci); }
284 void InterpreterRuntime::note_arrayCheck_trap(JavaThread* thread, Method *method, int trap_bci)
285 { if (ProfileTraps) note_trap(thread, Deoptimization::Reason_array_check, method, trap_bci); }
286 #endif // CC_INTERP
287
288
289 static Handle get_preinitialized_exception(Klass* k, TRAPS) {
290 // get klass
291 InstanceKlass* klass = InstanceKlass::cast(k);
292 assert(klass->is_initialized(),
293 "this klass should have been initialized during VM initialization");
294 // create instance - do not call constructor since we may have no
295 // (java) stack space left (should assert constructor is empty)
296 Handle exception;
297 oop exception_oop = klass->allocate_instance(CHECK_(exception));
298 exception = Handle(THREAD, exception_oop);
299 if (StackTraceInThrowable) {
300 java_lang_Throwable::fill_in_stack_trace(exception);
301 }
302 return exception;
303 }
304
305 // Special handling for stack overflow: since we don't have any (java) stack
306 // space left we use the pre-allocated & pre-initialized StackOverflowError
307 // klass to create an stack overflow error instance. We do not call its
308 // constructor for the same reason (it is empty, anyway).
309 IRT_ENTRY(void, InterpreterRuntime::throw_StackOverflowError(JavaThread* thread))
310 Handle exception = get_preinitialized_exception(
311 SystemDictionary::StackOverflowError_klass(),
312 CHECK);
313 // Increment counter for hs_err file reporting
314 Atomic::inc(&Exceptions::_stack_overflow_errors);
315 THROW_HANDLE(exception);
316 IRT_END
317
318 IRT_ENTRY(address, InterpreterRuntime::check_ReservedStackAccess_annotated_methods(JavaThread* thread))
319 frame fr = thread->last_frame();
320 assert(fr.is_java_frame(), "Must be a Java frame");
321 frame activation = SharedRuntime::look_for_reserved_stack_annotated_method(thread, fr);
322 if (activation.sp() != NULL) {
323 thread->disable_stack_reserved_zone();
324 thread->set_reserved_stack_activation((address)activation.unextended_sp());
325 }
326 return (address)activation.sp();
327 IRT_END
328
329 IRT_ENTRY(void, InterpreterRuntime::throw_delayed_StackOverflowError(JavaThread* thread))
330 Handle exception = get_preinitialized_exception(
331 SystemDictionary::StackOverflowError_klass(),
332 CHECK);
333 java_lang_Throwable::set_message(exception(),
334 Universe::delayed_stack_overflow_error_message());
335 // Increment counter for hs_err file reporting
336 Atomic::inc(&Exceptions::_stack_overflow_errors);
337 THROW_HANDLE(exception);
338 IRT_END
339
340 IRT_ENTRY(void, InterpreterRuntime::create_exception(JavaThread* thread, char* name, char* message))
341 // lookup exception klass
342 TempNewSymbol s = SymbolTable::new_symbol(name, CHECK);
343 if (ProfileTraps) {
344 if (s == vmSymbols::java_lang_ArithmeticException()) {
345 note_trap(thread, Deoptimization::Reason_div0_check, CHECK);
346 } else if (s == vmSymbols::java_lang_NullPointerException()) {
347 note_trap(thread, Deoptimization::Reason_null_check, CHECK);
348 }
349 }
350 // create exception
351 Handle exception = Exceptions::new_exception(thread, s, message);
352 thread->set_vm_result(exception());
353 IRT_END
354
355
356 IRT_ENTRY(void, InterpreterRuntime::create_klass_exception(JavaThread* thread, char* name, oopDesc* obj))
357 ResourceMark rm(thread);
358 const char* klass_name = obj->klass()->external_name();
359 // lookup exception klass
360 TempNewSymbol s = SymbolTable::new_symbol(name, CHECK);
361 if (ProfileTraps) {
362 note_trap(thread, Deoptimization::Reason_class_check, CHECK);
363 }
364 // create exception, with klass name as detail message
365 Handle exception = Exceptions::new_exception(thread, s, klass_name);
366 thread->set_vm_result(exception());
367 IRT_END
368
369
370 IRT_ENTRY(void, InterpreterRuntime::throw_ArrayIndexOutOfBoundsException(JavaThread* thread, char* name, jint index))
371 char message[jintAsStringSize];
372 // lookup exception klass
373 TempNewSymbol s = SymbolTable::new_symbol(name, CHECK);
374 if (ProfileTraps) {
375 note_trap(thread, Deoptimization::Reason_range_check, CHECK);
376 }
377 // create exception
378 sprintf(message, "%d", index);
379 THROW_MSG(s, message);
380 IRT_END
381
382 IRT_ENTRY(void, InterpreterRuntime::throw_ClassCastException(
383 JavaThread* thread, oopDesc* obj))
384
385 ResourceMark rm(thread);
386 char* message = SharedRuntime::generate_class_cast_message(
387 thread, obj->klass()->external_name());
388
389 if (ProfileTraps) {
390 note_trap(thread, Deoptimization::Reason_class_check, CHECK);
391 }
392
393 // create exception
394 THROW_MSG(vmSymbols::java_lang_ClassCastException(), message);
395 IRT_END
396
397 // exception_handler_for_exception(...) returns the continuation address,
398 // the exception oop (via TLS) and sets the bci/bcp for the continuation.
399 // The exception oop is returned to make sure it is preserved over GC (it
400 // is only on the stack if the exception was thrown explicitly via athrow).
401 // During this operation, the expression stack contains the values for the
402 // bci where the exception happened. If the exception was propagated back
403 // from a call, the expression stack contains the values for the bci at the
404 // invoke w/o arguments (i.e., as if one were inside the call).
405 IRT_ENTRY(address, InterpreterRuntime::exception_handler_for_exception(JavaThread* thread, oopDesc* exception))
406
407 Handle h_exception(thread, exception);
408 methodHandle h_method (thread, method(thread));
409 constantPoolHandle h_constants(thread, h_method->constants());
410 bool should_repeat;
411 int handler_bci;
412 int current_bci = bci(thread);
413
414 if (thread->frames_to_pop_failed_realloc() > 0) {
415 // Allocation of scalar replaced object used in this frame
416 // failed. Unconditionally pop the frame.
417 thread->dec_frames_to_pop_failed_realloc();
418 thread->set_vm_result(h_exception());
419 // If the method is synchronized we already unlocked the monitor
420 // during deoptimization so the interpreter needs to skip it when
421 // the frame is popped.
422 thread->set_do_not_unlock_if_synchronized(true);
423 #ifdef CC_INTERP
424 return (address) -1;
425 #else
426 return Interpreter::remove_activation_entry();
427 #endif
428 }
429
430 // Need to do this check first since when _do_not_unlock_if_synchronized
431 // is set, we don't want to trigger any classloading which may make calls
432 // into java, or surprisingly find a matching exception handler for bci 0
433 // since at this moment the method hasn't been "officially" entered yet.
434 if (thread->do_not_unlock_if_synchronized()) {
435 ResourceMark rm;
436 assert(current_bci == 0, "bci isn't zero for do_not_unlock_if_synchronized");
437 thread->set_vm_result(exception);
438 #ifdef CC_INTERP
439 return (address) -1;
440 #else
441 return Interpreter::remove_activation_entry();
442 #endif
443 }
444
445 do {
446 should_repeat = false;
447
448 // assertions
449 #ifdef ASSERT
450 assert(h_exception.not_null(), "NULL exceptions should be handled by athrow");
451 assert(h_exception->is_oop(), "just checking");
452 // Check that exception is a subclass of Throwable, otherwise we have a VerifyError
453 if (!(h_exception->is_a(SystemDictionary::Throwable_klass()))) {
454 if (ExitVMOnVerifyError) vm_exit(-1);
455 ShouldNotReachHere();
456 }
457 #endif
458
459 // tracing
460 if (log_is_enabled(Info, exceptions)) {
461 ResourceMark rm(thread);
462 Symbol* message = java_lang_Throwable::detail_message(h_exception());
463 stringStream tempst;
464 if (message != NULL) {
465 tempst.print("Exception <%s: %s> (" INTPTR_FORMAT ")\n",
466 h_exception->print_value_string(), message->as_C_string(),
467 p2i(h_exception()));
468 } else {
469 tempst.print("Exception <%s> (" INTPTR_FORMAT ")\n",
470 h_exception->print_value_string(),
471 p2i(h_exception()));
472 }
473 tempst.print(" thrown in interpreter method <%s>\n"
474 " at bci %d for thread " INTPTR_FORMAT,
475 h_method->print_value_string(), current_bci, p2i(thread));
476 LogHandle(exceptions)::info_stream()->print_raw_cr(tempst.as_string());
477 }
478 // Don't go paging in something which won't be used.
479 // else if (extable->length() == 0) {
480 // // disabled for now - interpreter is not using shortcut yet
481 // // (shortcut is not to call runtime if we have no exception handlers)
482 // // warning("performance bug: should not call runtime if method has no exception handlers");
483 // }
484 // for AbortVMOnException flag
485 Exceptions::debug_check_abort(h_exception);
486
487 // exception handler lookup
488 KlassHandle h_klass(THREAD, h_exception->klass());
489 handler_bci = Method::fast_exception_handler_bci_for(h_method, h_klass, current_bci, THREAD);
490 if (HAS_PENDING_EXCEPTION) {
491 // We threw an exception while trying to find the exception handler.
492 // Transfer the new exception to the exception handle which will
493 // be set into thread local storage, and do another lookup for an
494 // exception handler for this exception, this time starting at the
495 // BCI of the exception handler which caused the exception to be
496 // thrown (bug 4307310).
497 h_exception = Handle(THREAD, PENDING_EXCEPTION);
498 CLEAR_PENDING_EXCEPTION;
499 if (handler_bci >= 0) {
500 current_bci = handler_bci;
501 should_repeat = true;
502 }
503 }
504 } while (should_repeat == true);
505
506 #if INCLUDE_JVMCI
507 if (EnableJVMCI && h_method->method_data() != NULL) {
508 ResourceMark rm(thread);
509 ProfileData* pdata = h_method->method_data()->allocate_bci_to_data(current_bci, NULL);
510 if (pdata != NULL && pdata->is_BitData()) {
511 BitData* bit_data = (BitData*) pdata;
512 bit_data->set_exception_seen();
513 }
514 }
515 #endif
516
517 // notify JVMTI of an exception throw; JVMTI will detect if this is a first
518 // time throw or a stack unwinding throw and accordingly notify the debugger
519 if (JvmtiExport::can_post_on_exceptions()) {
520 JvmtiExport::post_exception_throw(thread, h_method(), bcp(thread), h_exception());
521 }
522
523 #ifdef CC_INTERP
524 address continuation = (address)(intptr_t) handler_bci;
525 #else
526 address continuation = NULL;
527 #endif
528 address handler_pc = NULL;
529 if (handler_bci < 0 || !thread->reguard_stack((address) &continuation)) {
530 // Forward exception to callee (leaving bci/bcp untouched) because (a) no
531 // handler in this method, or (b) after a stack overflow there is not yet
532 // enough stack space available to reprotect the stack.
533 #ifndef CC_INTERP
534 continuation = Interpreter::remove_activation_entry();
535 #endif
536 // Count this for compilation purposes
537 h_method->interpreter_throwout_increment(THREAD);
538 } else {
539 // handler in this method => change bci/bcp to handler bci/bcp and continue there
540 handler_pc = h_method->code_base() + handler_bci;
541 #ifndef CC_INTERP
542 set_bcp_and_mdp(handler_pc, thread);
543 continuation = Interpreter::dispatch_table(vtos)[*handler_pc];
544 #endif
545 }
546 // notify debugger of an exception catch
547 // (this is good for exceptions caught in native methods as well)
548 if (JvmtiExport::can_post_on_exceptions()) {
549 JvmtiExport::notice_unwind_due_to_exception(thread, h_method(), handler_pc, h_exception(), (handler_pc != NULL));
550 }
551
552 thread->set_vm_result(h_exception());
553 return continuation;
554 IRT_END
555
556
557 IRT_ENTRY(void, InterpreterRuntime::throw_pending_exception(JavaThread* thread))
558 assert(thread->has_pending_exception(), "must only ne called if there's an exception pending");
559 // nothing to do - eventually we should remove this code entirely (see comments @ call sites)
560 IRT_END
561
562
563 IRT_ENTRY(void, InterpreterRuntime::throw_AbstractMethodError(JavaThread* thread))
564 THROW(vmSymbols::java_lang_AbstractMethodError());
565 IRT_END
566
567
568 IRT_ENTRY(void, InterpreterRuntime::throw_IncompatibleClassChangeError(JavaThread* thread))
569 THROW(vmSymbols::java_lang_IncompatibleClassChangeError());
570 IRT_END
571
572
573 //------------------------------------------------------------------------------------------------------------------------
574 // Fields
575 //
576
577 void InterpreterRuntime::resolve_get_put(JavaThread* thread, Bytecodes::Code bytecode) {
578 Thread* THREAD = thread;
579 // resolve field
580 fieldDescriptor info;
581 constantPoolHandle pool(thread, method(thread)->constants());
582 bool is_put = (bytecode == Bytecodes::_putfield || bytecode == Bytecodes::_nofast_putfield ||
583 bytecode == Bytecodes::_putstatic);
584 bool is_static = (bytecode == Bytecodes::_getstatic || bytecode == Bytecodes::_putstatic);
585
586 {
587 JvmtiHideSingleStepping jhss(thread);
588 LinkResolver::resolve_field_access(info, pool, get_index_u2_cpcache(thread, bytecode),
589 bytecode, CHECK);
590 } // end JvmtiHideSingleStepping
591
592 // check if link resolution caused cpCache to be updated
593 ConstantPoolCacheEntry* cp_cache_entry = cache_entry(thread);
594 if (cp_cache_entry->is_resolved(bytecode)) return;
595
596 // compute auxiliary field attributes
597 TosState state = as_TosState(info.field_type());
598
599 // We need to delay resolving put instructions on final fields
600 // until we actually invoke one. This is required so we throw
601 // exceptions at the correct place. If we do not resolve completely
602 // in the current pass, leaving the put_code set to zero will
603 // cause the next put instruction to reresolve.
604 Bytecodes::Code put_code = (Bytecodes::Code)0;
605
606 // We also need to delay resolving getstatic instructions until the
607 // class is intitialized. This is required so that access to the static
608 // field will call the initialization function every time until the class
609 // is completely initialized ala. in 2.17.5 in JVM Specification.
610 InstanceKlass* klass = InstanceKlass::cast(info.field_holder());
611 bool uninitialized_static = ((bytecode == Bytecodes::_getstatic || bytecode == Bytecodes::_putstatic) &&
612 !klass->is_initialized());
613 Bytecodes::Code get_code = (Bytecodes::Code)0;
614
615 if (!uninitialized_static) {
616 get_code = ((is_static) ? Bytecodes::_getstatic : Bytecodes::_getfield);
617 if (is_put || !info.access_flags().is_final()) {
618 put_code = ((is_static) ? Bytecodes::_putstatic : Bytecodes::_putfield);
619 }
620 }
621
622 cp_cache_entry->set_field(
623 get_code,
624 put_code,
625 info.field_holder(),
626 info.index(),
627 info.offset(),
628 state,
629 info.access_flags().is_final(),
630 info.access_flags().is_volatile(),
631 pool->pool_holder()
632 );
633 }
634
635
636 //------------------------------------------------------------------------------------------------------------------------
637 // Synchronization
638 //
639 // The interpreter's synchronization code is factored out so that it can
640 // be shared by method invocation and synchronized blocks.
641 //%note synchronization_3
642
643 //%note monitor_1
644 IRT_ENTRY_NO_ASYNC(void, InterpreterRuntime::monitorenter(JavaThread* thread, BasicObjectLock* elem))
645 #ifdef ASSERT
646 thread->last_frame().interpreter_frame_verify_monitor(elem);
647 #endif
648 if (PrintBiasedLockingStatistics) {
649 Atomic::inc(BiasedLocking::slow_path_entry_count_addr());
650 }
651 Handle h_obj(thread, elem->obj());
652 assert(Universe::heap()->is_in_reserved_or_null(h_obj()),
653 "must be NULL or an object");
654 if (UseBiasedLocking) {
655 // Retry fast entry if bias is revoked to avoid unnecessary inflation
656 ObjectSynchronizer::fast_enter(h_obj, elem->lock(), true, CHECK);
657 } else {
658 ObjectSynchronizer::slow_enter(h_obj, elem->lock(), CHECK);
659 }
660 assert(Universe::heap()->is_in_reserved_or_null(elem->obj()),
661 "must be NULL or an object");
662 #ifdef ASSERT
663 thread->last_frame().interpreter_frame_verify_monitor(elem);
664 #endif
665 IRT_END
666
667
668 //%note monitor_1
669 IRT_ENTRY_NO_ASYNC(void, InterpreterRuntime::monitorexit(JavaThread* thread, BasicObjectLock* elem))
670 #ifdef ASSERT
671 thread->last_frame().interpreter_frame_verify_monitor(elem);
672 #endif
673 Handle h_obj(thread, elem->obj());
674 assert(Universe::heap()->is_in_reserved_or_null(h_obj()),
675 "must be NULL or an object");
676 if (elem == NULL || h_obj()->is_unlocked()) {
677 THROW(vmSymbols::java_lang_IllegalMonitorStateException());
678 }
679 ObjectSynchronizer::slow_exit(h_obj(), elem->lock(), thread);
680 // Free entry. This must be done here, since a pending exception might be installed on
681 // exit. If it is not cleared, the exception handling code will try to unlock the monitor again.
682 elem->set_obj(NULL);
683 #ifdef ASSERT
684 thread->last_frame().interpreter_frame_verify_monitor(elem);
685 #endif
686 IRT_END
687
688
689 IRT_ENTRY(void, InterpreterRuntime::throw_illegal_monitor_state_exception(JavaThread* thread))
690 THROW(vmSymbols::java_lang_IllegalMonitorStateException());
691 IRT_END
692
693
694 IRT_ENTRY(void, InterpreterRuntime::new_illegal_monitor_state_exception(JavaThread* thread))
695 // Returns an illegal exception to install into the current thread. The
696 // pending_exception flag is cleared so normal exception handling does not
697 // trigger. Any current installed exception will be overwritten. This
698 // method will be called during an exception unwind.
699
700 assert(!HAS_PENDING_EXCEPTION, "no pending exception");
701 Handle exception(thread, thread->vm_result());
702 assert(exception() != NULL, "vm result should be set");
703 thread->set_vm_result(NULL); // clear vm result before continuing (may cause memory leaks and assert failures)
704 if (!exception->is_a(SystemDictionary::ThreadDeath_klass())) {
705 exception = get_preinitialized_exception(
706 SystemDictionary::IllegalMonitorStateException_klass(),
707 CATCH);
708 }
709 thread->set_vm_result(exception());
710 IRT_END
711
712
713 //------------------------------------------------------------------------------------------------------------------------
714 // Invokes
715
716 IRT_ENTRY(Bytecodes::Code, InterpreterRuntime::get_original_bytecode_at(JavaThread* thread, Method* method, address bcp))
717 return method->orig_bytecode_at(method->bci_from(bcp));
718 IRT_END
719
720 IRT_ENTRY(void, InterpreterRuntime::set_original_bytecode_at(JavaThread* thread, Method* method, address bcp, Bytecodes::Code new_code))
721 method->set_orig_bytecode_at(method->bci_from(bcp), new_code);
722 IRT_END
723
724 IRT_ENTRY(void, InterpreterRuntime::_breakpoint(JavaThread* thread, Method* method, address bcp))
725 JvmtiExport::post_raw_breakpoint(thread, method, bcp);
726 IRT_END
727
728 void InterpreterRuntime::resolve_invoke(JavaThread* thread, Bytecodes::Code bytecode) {
729 Thread* THREAD = thread;
730 // extract receiver from the outgoing argument list if necessary
731 Handle receiver(thread, NULL);
732 if (bytecode == Bytecodes::_invokevirtual || bytecode == Bytecodes::_invokeinterface) {
733 ResourceMark rm(thread);
734 methodHandle m (thread, method(thread));
735 Bytecode_invoke call(m, bci(thread));
736 Symbol* signature = call.signature();
737 receiver = Handle(thread,
738 thread->last_frame().interpreter_callee_receiver(signature));
739 assert(Universe::heap()->is_in_reserved_or_null(receiver()),
740 "sanity check");
741 assert(receiver.is_null() ||
742 !Universe::heap()->is_in_reserved(receiver->klass()),
743 "sanity check");
744 }
745
746 // resolve method
747 CallInfo info;
748 constantPoolHandle pool(thread, method(thread)->constants());
749
750 {
751 JvmtiHideSingleStepping jhss(thread);
752 LinkResolver::resolve_invoke(info, receiver, pool,
753 get_index_u2_cpcache(thread, bytecode), bytecode,
754 CHECK);
755 if (JvmtiExport::can_hotswap_or_post_breakpoint()) {
756 int retry_count = 0;
757 while (info.resolved_method()->is_old()) {
758 // It is very unlikely that method is redefined more than 100 times
759 // in the middle of resolve. If it is looping here more than 100 times
760 // means then there could be a bug here.
761 guarantee((retry_count++ < 100),
762 "Could not resolve to latest version of redefined method");
763 // method is redefined in the middle of resolve so re-try.
764 LinkResolver::resolve_invoke(info, receiver, pool,
765 get_index_u2_cpcache(thread, bytecode), bytecode,
766 CHECK);
767 }
768 }
769 } // end JvmtiHideSingleStepping
770
771 // check if link resolution caused cpCache to be updated
772 ConstantPoolCacheEntry* cp_cache_entry = cache_entry(thread);
773 if (cp_cache_entry->is_resolved(bytecode)) return;
774
775 if (bytecode == Bytecodes::_invokeinterface) {
776 ResourceMark rm(thread);
777 log_develop_trace(itables)("Resolving: klass: %s to method: %s",
778 info.resolved_klass()->name()->as_C_string(),
779 info.resolved_method()->name()->as_C_string());
780 }
781 #ifdef ASSERT
782 if (bytecode == Bytecodes::_invokeinterface) {
783 if (info.resolved_method()->method_holder() ==
784 SystemDictionary::Object_klass()) {
785 // NOTE: THIS IS A FIX FOR A CORNER CASE in the JVM spec
786 // (see also CallInfo::set_interface for details)
787 assert(info.call_kind() == CallInfo::vtable_call ||
788 info.call_kind() == CallInfo::direct_call, "");
789 methodHandle rm = info.resolved_method();
790 assert(rm->is_final() || info.has_vtable_index(),
791 "should have been set already");
792 } else if (!info.resolved_method()->has_itable_index()) {
793 // Resolved something like CharSequence.toString. Use vtable not itable.
794 assert(info.call_kind() != CallInfo::itable_call, "");
795 } else {
796 // Setup itable entry
797 assert(info.call_kind() == CallInfo::itable_call, "");
798 int index = info.resolved_method()->itable_index();
799 assert(info.itable_index() == index, "");
800 }
801 } else {
802 assert(info.call_kind() == CallInfo::direct_call ||
803 info.call_kind() == CallInfo::vtable_call, "");
804 }
805 #endif
806 switch (info.call_kind()) {
807 case CallInfo::direct_call:
808 cp_cache_entry->set_direct_call(
809 bytecode,
810 info.resolved_method());
811 break;
812 case CallInfo::vtable_call:
813 cp_cache_entry->set_vtable_call(
814 bytecode,
815 info.resolved_method(),
816 info.vtable_index());
817 break;
818 case CallInfo::itable_call:
819 cp_cache_entry->set_itable_call(
820 bytecode,
821 info.resolved_method(),
822 info.itable_index());
823 break;
824 default: ShouldNotReachHere();
825 }
826 }
827
828
829 // First time execution: Resolve symbols, create a permanent MethodType object.
830 void InterpreterRuntime::resolve_invokehandle(JavaThread* thread) {
831 Thread* THREAD = thread;
832 const Bytecodes::Code bytecode = Bytecodes::_invokehandle;
833
834 // resolve method
835 CallInfo info;
836 constantPoolHandle pool(thread, method(thread)->constants());
837 {
838 JvmtiHideSingleStepping jhss(thread);
839 LinkResolver::resolve_invoke(info, Handle(), pool,
840 get_index_u2_cpcache(thread, bytecode), bytecode,
841 CHECK);
842 } // end JvmtiHideSingleStepping
843
844 ConstantPoolCacheEntry* cp_cache_entry = cache_entry(thread);
845 cp_cache_entry->set_method_handle(pool, info);
846 }
847
848 // First time execution: Resolve symbols, create a permanent CallSite object.
849 void InterpreterRuntime::resolve_invokedynamic(JavaThread* thread) {
850 Thread* THREAD = thread;
851 const Bytecodes::Code bytecode = Bytecodes::_invokedynamic;
852
853 //TO DO: consider passing BCI to Java.
854 // int caller_bci = method(thread)->bci_from(bcp(thread));
855
856 // resolve method
857 CallInfo info;
858 constantPoolHandle pool(thread, method(thread)->constants());
859 int index = get_index_u4(thread, bytecode);
860 {
861 JvmtiHideSingleStepping jhss(thread);
862 LinkResolver::resolve_invoke(info, Handle(), pool,
863 index, bytecode, CHECK);
864 } // end JvmtiHideSingleStepping
865
866 ConstantPoolCacheEntry* cp_cache_entry = pool->invokedynamic_cp_cache_entry_at(index);
867 cp_cache_entry->set_dynamic_call(pool, info);
868 }
869
870 // This function is the interface to the assembly code. It returns the resolved
871 // cpCache entry. This doesn't safepoint, but the helper routines safepoint.
872 // This function will check for redefinition!
873 IRT_ENTRY(void, InterpreterRuntime::resolve_from_cache(JavaThread* thread, Bytecodes::Code bytecode)) {
874 switch (bytecode) {
875 case Bytecodes::_getstatic:
876 case Bytecodes::_putstatic:
877 case Bytecodes::_getfield:
878 case Bytecodes::_putfield:
879 resolve_get_put(thread, bytecode);
880 break;
881 case Bytecodes::_invokevirtual:
882 case Bytecodes::_invokespecial:
883 case Bytecodes::_invokestatic:
884 case Bytecodes::_invokeinterface:
885 resolve_invoke(thread, bytecode);
886 break;
887 case Bytecodes::_invokehandle:
888 resolve_invokehandle(thread);
889 break;
890 case Bytecodes::_invokedynamic:
891 resolve_invokedynamic(thread);
892 break;
893 default:
894 fatal("unexpected bytecode: %s", Bytecodes::name(bytecode));
895 break;
896 }
897 }
898 IRT_END
899
900 //------------------------------------------------------------------------------------------------------------------------
901 // Miscellaneous
902
903
904 nmethod* InterpreterRuntime::frequency_counter_overflow(JavaThread* thread, address branch_bcp) {
905 nmethod* nm = frequency_counter_overflow_inner(thread, branch_bcp);
906 assert(branch_bcp != NULL || nm == NULL, "always returns null for non OSR requests");
907 if (branch_bcp != NULL && nm != NULL) {
908 // This was a successful request for an OSR nmethod. Because
909 // frequency_counter_overflow_inner ends with a safepoint check,
910 // nm could have been unloaded so look it up again. It's unsafe
911 // to examine nm directly since it might have been freed and used
912 // for something else.
913 frame fr = thread->last_frame();
914 Method* method = fr.interpreter_frame_method();
915 int bci = method->bci_from(fr.interpreter_frame_bcp());
916 nm = method->lookup_osr_nmethod_for(bci, CompLevel_none, false);
917 }
918 #ifndef PRODUCT
919 if (TraceOnStackReplacement) {
920 if (nm != NULL) {
921 tty->print("OSR entry @ pc: " INTPTR_FORMAT ": ", p2i(nm->osr_entry()));
922 nm->print();
923 }
924 }
925 #endif
926 return nm;
927 }
928
929 IRT_ENTRY(nmethod*,
930 InterpreterRuntime::frequency_counter_overflow_inner(JavaThread* thread, address branch_bcp))
931 // use UnlockFlagSaver to clear and restore the _do_not_unlock_if_synchronized
932 // flag, in case this method triggers classloading which will call into Java.
933 UnlockFlagSaver fs(thread);
934
935 frame fr = thread->last_frame();
936 assert(fr.is_interpreted_frame(), "must come from interpreter");
937 methodHandle method(thread, fr.interpreter_frame_method());
938 const int branch_bci = branch_bcp != NULL ? method->bci_from(branch_bcp) : InvocationEntryBci;
939 const int bci = branch_bcp != NULL ? method->bci_from(fr.interpreter_frame_bcp()) : InvocationEntryBci;
940
941 assert(!HAS_PENDING_EXCEPTION, "Should not have any exceptions pending");
942 nmethod* osr_nm = CompilationPolicy::policy()->event(method, method, branch_bci, bci, CompLevel_none, NULL, thread);
943 assert(!HAS_PENDING_EXCEPTION, "Event handler should not throw any exceptions");
944
945 if (osr_nm != NULL) {
946 // We may need to do on-stack replacement which requires that no
947 // monitors in the activation are biased because their
948 // BasicObjectLocks will need to migrate during OSR. Force
949 // unbiasing of all monitors in the activation now (even though
950 // the OSR nmethod might be invalidated) because we don't have a
951 // safepoint opportunity later once the migration begins.
952 if (UseBiasedLocking) {
953 ResourceMark rm;
954 GrowableArray<Handle>* objects_to_revoke = new GrowableArray<Handle>();
955 for( BasicObjectLock *kptr = fr.interpreter_frame_monitor_end();
956 kptr < fr.interpreter_frame_monitor_begin();
957 kptr = fr.next_monitor_in_interpreter_frame(kptr) ) {
958 if( kptr->obj() != NULL ) {
959 objects_to_revoke->append(Handle(THREAD, kptr->obj()));
960 }
961 }
962 BiasedLocking::revoke(objects_to_revoke);
963 }
964 }
965 return osr_nm;
966 IRT_END
967
968 IRT_LEAF(jint, InterpreterRuntime::bcp_to_di(Method* method, address cur_bcp))
969 assert(ProfileInterpreter, "must be profiling interpreter");
970 int bci = method->bci_from(cur_bcp);
971 MethodData* mdo = method->method_data();
972 if (mdo == NULL) return 0;
973 return mdo->bci_to_di(bci);
974 IRT_END
975
976 IRT_ENTRY(void, InterpreterRuntime::profile_method(JavaThread* thread))
977 // use UnlockFlagSaver to clear and restore the _do_not_unlock_if_synchronized
978 // flag, in case this method triggers classloading which will call into Java.
979 UnlockFlagSaver fs(thread);
980
981 assert(ProfileInterpreter, "must be profiling interpreter");
982 frame fr = thread->last_frame();
983 assert(fr.is_interpreted_frame(), "must come from interpreter");
984 methodHandle method(thread, fr.interpreter_frame_method());
985 Method::build_interpreter_method_data(method, THREAD);
986 if (HAS_PENDING_EXCEPTION) {
987 assert((PENDING_EXCEPTION->is_a(SystemDictionary::OutOfMemoryError_klass())), "we expect only an OOM error here");
988 CLEAR_PENDING_EXCEPTION;
989 // and fall through...
990 }
991 IRT_END
992
993
994 #ifdef ASSERT
995 IRT_LEAF(void, InterpreterRuntime::verify_mdp(Method* method, address bcp, address mdp))
996 assert(ProfileInterpreter, "must be profiling interpreter");
997
998 MethodData* mdo = method->method_data();
999 assert(mdo != NULL, "must not be null");
1000
1001 int bci = method->bci_from(bcp);
1002
1003 address mdp2 = mdo->bci_to_dp(bci);
1004 if (mdp != mdp2) {
1005 ResourceMark rm;
1006 ResetNoHandleMark rnm; // In a LEAF entry.
1007 HandleMark hm;
1008 tty->print_cr("FAILED verify : actual mdp %p expected mdp %p @ bci %d", mdp, mdp2, bci);
1009 int current_di = mdo->dp_to_di(mdp);
1010 int expected_di = mdo->dp_to_di(mdp2);
1011 tty->print_cr(" actual di %d expected di %d", current_di, expected_di);
1012 int expected_approx_bci = mdo->data_at(expected_di)->bci();
1013 int approx_bci = -1;
1014 if (current_di >= 0) {
1015 approx_bci = mdo->data_at(current_di)->bci();
1016 }
1017 tty->print_cr(" actual bci is %d expected bci %d", approx_bci, expected_approx_bci);
1018 mdo->print_on(tty);
1019 method->print_codes();
1020 }
1021 assert(mdp == mdp2, "wrong mdp");
1022 IRT_END
1023 #endif // ASSERT
1024
1025 IRT_ENTRY(void, InterpreterRuntime::update_mdp_for_ret(JavaThread* thread, int return_bci))
1026 assert(ProfileInterpreter, "must be profiling interpreter");
1027 ResourceMark rm(thread);
1028 HandleMark hm(thread);
1029 frame fr = thread->last_frame();
1030 assert(fr.is_interpreted_frame(), "must come from interpreter");
1031 MethodData* h_mdo = fr.interpreter_frame_method()->method_data();
1032
1033 // Grab a lock to ensure atomic access to setting the return bci and
1034 // the displacement. This can block and GC, invalidating all naked oops.
1035 MutexLocker ml(RetData_lock);
1036
1037 // ProfileData is essentially a wrapper around a derived oop, so we
1038 // need to take the lock before making any ProfileData structures.
1039 ProfileData* data = h_mdo->data_at(h_mdo->dp_to_di(fr.interpreter_frame_mdp()));
1040 RetData* rdata = data->as_RetData();
1041 address new_mdp = rdata->fixup_ret(return_bci, h_mdo);
1042 fr.interpreter_frame_set_mdp(new_mdp);
1043 IRT_END
1044
1045 IRT_ENTRY(MethodCounters*, InterpreterRuntime::build_method_counters(JavaThread* thread, Method* m))
1046 MethodCounters* mcs = Method::build_method_counters(m, thread);
1047 if (HAS_PENDING_EXCEPTION) {
1048 assert((PENDING_EXCEPTION->is_a(SystemDictionary::OutOfMemoryError_klass())), "we expect only an OOM error here");
1049 CLEAR_PENDING_EXCEPTION;
1050 }
1051 return mcs;
1052 IRT_END
1053
1054
1055 IRT_ENTRY(void, InterpreterRuntime::at_safepoint(JavaThread* thread))
1056 // We used to need an explict preserve_arguments here for invoke bytecodes. However,
1057 // stack traversal automatically takes care of preserving arguments for invoke, so
1058 // this is no longer needed.
1059
1060 // IRT_END does an implicit safepoint check, hence we are guaranteed to block
1061 // if this is called during a safepoint
1062
1063 if (JvmtiExport::should_post_single_step()) {
1064 // We are called during regular safepoints and when the VM is
1065 // single stepping. If any thread is marked for single stepping,
1066 // then we may have JVMTI work to do.
1067 JvmtiExport::at_single_stepping_point(thread, method(thread), bcp(thread));
1068 }
1069 IRT_END
1070
1071 IRT_ENTRY(void, InterpreterRuntime::post_field_access(JavaThread *thread, oopDesc* obj,
1072 ConstantPoolCacheEntry *cp_entry))
1073
1074 // check the access_flags for the field in the klass
1075
1076 InstanceKlass* ik = InstanceKlass::cast(cp_entry->f1_as_klass());
1077 int index = cp_entry->field_index();
1078 if ((ik->field_access_flags(index) & JVM_ACC_FIELD_ACCESS_WATCHED) == 0) return;
1079
1080 bool is_static = (obj == NULL);
1081 HandleMark hm(thread);
1082
1083 Handle h_obj;
1084 if (!is_static) {
1085 // non-static field accessors have an object, but we need a handle
1086 h_obj = Handle(thread, obj);
1087 }
1088 instanceKlassHandle h_cp_entry_f1(thread, (Klass*)cp_entry->f1_as_klass());
1089 jfieldID fid = jfieldIDWorkaround::to_jfieldID(h_cp_entry_f1, cp_entry->f2_as_index(), is_static);
1090 JvmtiExport::post_field_access(thread, method(thread), bcp(thread), h_cp_entry_f1, h_obj, fid);
1091 IRT_END
1092
1093 IRT_ENTRY(void, InterpreterRuntime::post_field_modification(JavaThread *thread,
1094 oopDesc* obj, ConstantPoolCacheEntry *cp_entry, jvalue *value))
1095
1096 Klass* k = (Klass*)cp_entry->f1_as_klass();
1097
1098 // check the access_flags for the field in the klass
1099 InstanceKlass* ik = InstanceKlass::cast(k);
1100 int index = cp_entry->field_index();
1101 // bail out if field modifications are not watched
1102 if ((ik->field_access_flags(index) & JVM_ACC_FIELD_MODIFICATION_WATCHED) == 0) return;
1103
1104 char sig_type = '\0';
1105
1106 switch(cp_entry->flag_state()) {
1107 case btos: sig_type = 'Z'; break;
1108 case ctos: sig_type = 'C'; break;
1109 case stos: sig_type = 'S'; break;
1110 case itos: sig_type = 'I'; break;
1111 case ftos: sig_type = 'F'; break;
1112 case atos: sig_type = 'L'; break;
1113 case ltos: sig_type = 'J'; break;
1114 case dtos: sig_type = 'D'; break;
1115 default: ShouldNotReachHere(); return;
1116 }
1117 bool is_static = (obj == NULL);
1118
1119 HandleMark hm(thread);
1120 instanceKlassHandle h_klass(thread, k);
1121 jfieldID fid = jfieldIDWorkaround::to_jfieldID(h_klass, cp_entry->f2_as_index(), is_static);
1122 jvalue fvalue;
1123 #ifdef _LP64
1124 fvalue = *value;
1125 #else
1126 // Long/double values are stored unaligned and also noncontiguously with
1127 // tagged stacks. We can't just do a simple assignment even in the non-
1128 // J/D cases because a C++ compiler is allowed to assume that a jvalue is
1129 // 8-byte aligned, and interpreter stack slots are only 4-byte aligned.
1130 // We assume that the two halves of longs/doubles are stored in interpreter
1131 // stack slots in platform-endian order.
1132 jlong_accessor u;
1133 jint* newval = (jint*)value;
1134 u.words[0] = newval[0];
1135 u.words[1] = newval[Interpreter::stackElementWords]; // skip if tag
1136 fvalue.j = u.long_value;
1137 #endif // _LP64
1138
1139 Handle h_obj;
1140 if (!is_static) {
1141 // non-static field accessors have an object, but we need a handle
1142 h_obj = Handle(thread, obj);
1143 }
1144
1145 JvmtiExport::post_raw_field_modification(thread, method(thread), bcp(thread), h_klass, h_obj,
1146 fid, sig_type, &fvalue);
1147 IRT_END
1148
1149 IRT_ENTRY(void, InterpreterRuntime::post_method_entry(JavaThread *thread))
1150 JvmtiExport::post_method_entry(thread, InterpreterRuntime::method(thread), InterpreterRuntime::last_frame(thread));
1151 IRT_END
1152
1153
1154 IRT_ENTRY(void, InterpreterRuntime::post_method_exit(JavaThread *thread))
1155 JvmtiExport::post_method_exit(thread, InterpreterRuntime::method(thread), InterpreterRuntime::last_frame(thread));
1156 IRT_END
1157
1158 IRT_LEAF(int, InterpreterRuntime::interpreter_contains(address pc))
1159 {
1160 return (Interpreter::contains(pc) ? 1 : 0);
1161 }
1162 IRT_END
1163
1164
1165 // Implementation of SignatureHandlerLibrary
1166
1167 #ifndef SHARING_FAST_NATIVE_FINGERPRINTS
1168 // Dummy definition (else normalization method is defined in CPU
1169 // dependant code)
1170 uint64_t InterpreterRuntime::normalize_fast_native_fingerprint(uint64_t fingerprint) {
1171 return fingerprint;
1172 }
1173 #endif
1174
1175 address SignatureHandlerLibrary::set_handler_blob() {
1176 BufferBlob* handler_blob = BufferBlob::create("native signature handlers", blob_size);
1177 if (handler_blob == NULL) {
1178 return NULL;
1179 }
1180 address handler = handler_blob->code_begin();
1181 _handler_blob = handler_blob;
1182 _handler = handler;
1183 return handler;
1184 }
1185
1186 void SignatureHandlerLibrary::initialize() {
1187 if (_fingerprints != NULL) {
1188 return;
1189 }
1190 if (set_handler_blob() == NULL) {
1191 vm_exit_out_of_memory(blob_size, OOM_MALLOC_ERROR, "native signature handlers");
1192 }
1193
1194 BufferBlob* bb = BufferBlob::create("Signature Handler Temp Buffer",
1195 SignatureHandlerLibrary::buffer_size);
1196 _buffer = bb->code_begin();
1197
1198 _fingerprints = new(ResourceObj::C_HEAP, mtCode)GrowableArray<uint64_t>(32, true);
1199 _handlers = new(ResourceObj::C_HEAP, mtCode)GrowableArray<address>(32, true);
1200 }
1201
1202 address SignatureHandlerLibrary::set_handler(CodeBuffer* buffer) {
1203 address handler = _handler;
1204 int insts_size = buffer->pure_insts_size();
1205 if (handler + insts_size > _handler_blob->code_end()) {
1206 // get a new handler blob
1207 handler = set_handler_blob();
1208 }
1209 if (handler != NULL) {
1210 memcpy(handler, buffer->insts_begin(), insts_size);
1211 pd_set_handler(handler);
1212 ICache::invalidate_range(handler, insts_size);
1213 _handler = handler + insts_size;
1214 }
1215 CodeCacheExtensions::handle_generated_handler(handler, buffer->name(), _handler);
1216 return handler;
1217 }
1218
1219 void SignatureHandlerLibrary::add(const methodHandle& method) {
1220 if (method->signature_handler() == NULL) {
1221 // use slow signature handler if we can't do better
1222 int handler_index = -1;
1223 // check if we can use customized (fast) signature handler
1224 if (UseFastSignatureHandlers && CodeCacheExtensions::support_fast_signature_handlers() && method->size_of_parameters() <= Fingerprinter::max_size_of_parameters) {
1225 // use customized signature handler
1226 MutexLocker mu(SignatureHandlerLibrary_lock);
1227 // make sure data structure is initialized
1228 initialize();
1229 // lookup method signature's fingerprint
1230 uint64_t fingerprint = Fingerprinter(method).fingerprint();
1231 // allow CPU dependant code to optimize the fingerprints for the fast handler
1232 fingerprint = InterpreterRuntime::normalize_fast_native_fingerprint(fingerprint);
1233 handler_index = _fingerprints->find(fingerprint);
1234 // create handler if necessary
1235 if (handler_index < 0) {
1236 ResourceMark rm;
1237 ptrdiff_t align_offset = (address)
1238 round_to((intptr_t)_buffer, CodeEntryAlignment) - (address)_buffer;
1239 CodeBuffer buffer((address)(_buffer + align_offset),
1240 SignatureHandlerLibrary::buffer_size - align_offset);
1241 if (!CodeCacheExtensions::support_dynamic_code()) {
1242 // we need a name for the signature (for lookups or saving)
1243 const int SYMBOL_SIZE = 50;
1244 char *symbolName = NEW_RESOURCE_ARRAY(char, SYMBOL_SIZE);
1245 // support for named signatures
1246 jio_snprintf(symbolName, SYMBOL_SIZE,
1247 "native_" UINT64_FORMAT, fingerprint);
1248 buffer.set_name(symbolName);
1249 }
1250 InterpreterRuntime::SignatureHandlerGenerator(method, &buffer).generate(fingerprint);
1251 // copy into code heap
1252 address handler = set_handler(&buffer);
1253 if (handler == NULL) {
1254 // use slow signature handler (without memorizing it in the fingerprints)
1255 } else {
1256 // debugging suppport
1257 if (PrintSignatureHandlers && (handler != Interpreter::slow_signature_handler())) {
1258 tty->cr();
1259 tty->print_cr("argument handler #%d for: %s %s (fingerprint = " UINT64_FORMAT ", %d bytes generated)",
1260 _handlers->length(),
1261 (method->is_static() ? "static" : "receiver"),
1262 method->name_and_sig_as_C_string(),
1263 fingerprint,
1264 buffer.insts_size());
1265 if (buffer.insts_size() > 0) {
1266 // buffer may be empty for pregenerated handlers
1267 Disassembler::decode(handler, handler + buffer.insts_size());
1268 }
1269 #ifndef PRODUCT
1270 address rh_begin = Interpreter::result_handler(method()->result_type());
1271 if (CodeCache::contains(rh_begin)) {
1272 // else it might be special platform dependent values
1273 tty->print_cr(" --- associated result handler ---");
1274 address rh_end = rh_begin;
1275 while (*(int*)rh_end != 0) {
1276 rh_end += sizeof(int);
1277 }
1278 Disassembler::decode(rh_begin, rh_end);
1279 } else {
1280 tty->print_cr(" associated result handler: " PTR_FORMAT, p2i(rh_begin));
1281 }
1282 #endif
1283 }
1284 // add handler to library
1285 _fingerprints->append(fingerprint);
1286 _handlers->append(handler);
1287 // set handler index
1288 assert(_fingerprints->length() == _handlers->length(), "sanity check");
1289 handler_index = _fingerprints->length() - 1;
1290 }
1291 }
1292 // Set handler under SignatureHandlerLibrary_lock
1293 if (handler_index < 0) {
1294 // use generic signature handler
1295 method->set_signature_handler(Interpreter::slow_signature_handler());
1296 } else {
1297 // set handler
1298 method->set_signature_handler(_handlers->at(handler_index));
1299 }
1300 } else {
1301 CHECK_UNHANDLED_OOPS_ONLY(Thread::current()->clear_unhandled_oops());
1302 // use generic signature handler
1303 method->set_signature_handler(Interpreter::slow_signature_handler());
1304 }
1305 }
1306 #ifdef ASSERT
1307 int handler_index = -1;
1308 int fingerprint_index = -2;
1309 {
1310 // '_handlers' and '_fingerprints' are 'GrowableArray's and are NOT synchronized
1311 // in any way if accessed from multiple threads. To avoid races with another
1312 // thread which may change the arrays in the above, mutex protected block, we
1313 // have to protect this read access here with the same mutex as well!
1314 MutexLocker mu(SignatureHandlerLibrary_lock);
1315 if (_handlers != NULL) {
1316 handler_index = _handlers->find(method->signature_handler());
1317 uint64_t fingerprint = Fingerprinter(method).fingerprint();
1318 fingerprint = InterpreterRuntime::normalize_fast_native_fingerprint(fingerprint);
1319 fingerprint_index = _fingerprints->find(fingerprint);
1320 }
1321 }
1322 assert(method->signature_handler() == Interpreter::slow_signature_handler() ||
1323 handler_index == fingerprint_index, "sanity check");
1324 #endif // ASSERT
1325 }
1326
1327 void SignatureHandlerLibrary::add(uint64_t fingerprint, address handler) {
1328 int handler_index = -1;
1329 // use customized signature handler
1330 MutexLocker mu(SignatureHandlerLibrary_lock);
1331 // make sure data structure is initialized
1332 initialize();
1333 fingerprint = InterpreterRuntime::normalize_fast_native_fingerprint(fingerprint);
1334 handler_index = _fingerprints->find(fingerprint);
1335 // create handler if necessary
1336 if (handler_index < 0) {
1337 if (PrintSignatureHandlers && (handler != Interpreter::slow_signature_handler())) {
1338 tty->cr();
1339 tty->print_cr("argument handler #%d at " PTR_FORMAT " for fingerprint " UINT64_FORMAT,
1340 _handlers->length(),
1341 p2i(handler),
1342 fingerprint);
1343 }
1344 _fingerprints->append(fingerprint);
1345 _handlers->append(handler);
1346 } else {
1347 if (PrintSignatureHandlers) {
1348 tty->cr();
1349 tty->print_cr("duplicate argument handler #%d for fingerprint " UINT64_FORMAT "(old: " PTR_FORMAT ", new : " PTR_FORMAT ")",
1350 _handlers->length(),
1351 fingerprint,
1352 p2i(_handlers->at(handler_index)),
1353 p2i(handler));
1354 }
1355 }
1356 }
1357
1358
1359 BufferBlob* SignatureHandlerLibrary::_handler_blob = NULL;
1360 address SignatureHandlerLibrary::_handler = NULL;
1361 GrowableArray<uint64_t>* SignatureHandlerLibrary::_fingerprints = NULL;
1362 GrowableArray<address>* SignatureHandlerLibrary::_handlers = NULL;
1363 address SignatureHandlerLibrary::_buffer = NULL;
1364
1365
1366 IRT_ENTRY(void, InterpreterRuntime::prepare_native_call(JavaThread* thread, Method* method))
1367 methodHandle m(thread, method);
1368 assert(m->is_native(), "sanity check");
1369 // lookup native function entry point if it doesn't exist
1370 bool in_base_library;
1371 if (!m->has_native_function()) {
1372 NativeLookup::lookup(m, in_base_library, CHECK);
1373 }
1374 // make sure signature handler is installed
1375 SignatureHandlerLibrary::add(m);
1376 // The interpreter entry point checks the signature handler first,
1377 // before trying to fetch the native entry point and klass mirror.
1378 // We must set the signature handler last, so that multiple processors
1379 // preparing the same method will be sure to see non-null entry & mirror.
1380 IRT_END
1381
1382 #if defined(IA32) || defined(AMD64) || defined(ARM)
1383 IRT_LEAF(void, InterpreterRuntime::popframe_move_outgoing_args(JavaThread* thread, void* src_address, void* dest_address))
1384 if (src_address == dest_address) {
1385 return;
1386 }
1387 ResetNoHandleMark rnm; // In a LEAF entry.
1388 HandleMark hm;
1389 ResourceMark rm;
1390 frame fr = thread->last_frame();
1391 assert(fr.is_interpreted_frame(), "");
1392 jint bci = fr.interpreter_frame_bci();
1393 methodHandle mh(thread, fr.interpreter_frame_method());
1394 Bytecode_invoke invoke(mh, bci);
1395 ArgumentSizeComputer asc(invoke.signature());
1396 int size_of_arguments = (asc.size() + (invoke.has_receiver() ? 1 : 0)); // receiver
1397 Copy::conjoint_jbytes(src_address, dest_address,
1398 size_of_arguments * Interpreter::stackElementSize);
1399 IRT_END
1400 #endif
1401
1402 #if INCLUDE_JVMTI
1403 // This is a support of the JVMTI PopFrame interface.
1404 // Make sure it is an invokestatic of a polymorphic intrinsic that has a member_name argument
1405 // and return it as a vm_result so that it can be reloaded in the list of invokestatic parameters.
1406 // The member_name argument is a saved reference (in local#0) to the member_name.
1407 // For backward compatibility with some JDK versions (7, 8) it can also be a direct method handle.
1408 // FIXME: remove DMH case after j.l.i.InvokerBytecodeGenerator code shape is updated.
1409 IRT_ENTRY(void, InterpreterRuntime::member_name_arg_or_null(JavaThread* thread, address member_name,
1410 Method* method, address bcp))
1411 Bytecodes::Code code = Bytecodes::code_at(method, bcp);
1412 if (code != Bytecodes::_invokestatic) {
1413 return;
1414 }
1415 ConstantPool* cpool = method->constants();
1416 int cp_index = Bytes::get_native_u2(bcp + 1) + ConstantPool::CPCACHE_INDEX_TAG;
1417 Symbol* cname = cpool->klass_name_at(cpool->klass_ref_index_at(cp_index));
1418 Symbol* mname = cpool->name_ref_at(cp_index);
1419
1420 if (MethodHandles::has_member_arg(cname, mname)) {
1421 oop member_name_oop = (oop) member_name;
1422 if (java_lang_invoke_DirectMethodHandle::is_instance(member_name_oop)) {
1423 // FIXME: remove after j.l.i.InvokerBytecodeGenerator code shape is updated.
1424 member_name_oop = java_lang_invoke_DirectMethodHandle::member(member_name_oop);
1425 }
1426 thread->set_vm_result(member_name_oop);
1427 } else {
1428 thread->set_vm_result(NULL);
1429 }
1430 IRT_END
1431 #endif // INCLUDE_JVMTI