1 /*
2 * Copyright (c) 1997, 2016, 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/resourceArea.hpp"
41 #include "memory/universe.inline.hpp"
42 #include "oops/constantPool.hpp"
43 #include "oops/instanceKlass.hpp"
44 #include "oops/methodData.hpp"
45 #include "oops/objArrayKlass.hpp"
46 #include "oops/objArrayOop.inline.hpp"
47 #include "oops/oop.inline.hpp"
48 #include "oops/symbol.hpp"
49 #include "prims/jvmtiExport.hpp"
50 #include "prims/nativeLookup.hpp"
51 #include "runtime/atomic.hpp"
52 #include "runtime/biasedLocking.hpp"
53 #include "runtime/compilationPolicy.hpp"
54 #include "runtime/deoptimization.hpp"
55 #include "runtime/fieldDescriptor.hpp"
56 #include "runtime/handles.inline.hpp"
57 #include "runtime/icache.hpp"
58 #include "runtime/interfaceSupport.hpp"
59 #include "runtime/java.hpp"
60 #include "runtime/jfieldIDWorkaround.hpp"
61 #include "runtime/osThread.hpp"
62 #include "runtime/sharedRuntime.hpp"
63 #include "runtime/stubRoutines.hpp"
64 #include "runtime/synchronizer.hpp"
65 #include "runtime/threadCritical.hpp"
66 #include "utilities/events.hpp"
67 #ifdef COMPILER2
68 #include "opto/runtime.hpp"
69 #endif
70
71 class UnlockFlagSaver {
72 private:
73 JavaThread* _thread;
74 bool _do_not_unlock;
75 public:
76 UnlockFlagSaver(JavaThread* t) {
77 _thread = t;
78 _do_not_unlock = t->do_not_unlock_if_synchronized();
79 t->set_do_not_unlock_if_synchronized(false);
80 }
81 ~UnlockFlagSaver() {
82 _thread->set_do_not_unlock_if_synchronized(_do_not_unlock);
83 }
84 };
85
86 //------------------------------------------------------------------------------------------------------------------------
87 // State accessors
88
89 void InterpreterRuntime::set_bcp_and_mdp(address bcp, JavaThread *thread) {
90 last_frame(thread).interpreter_frame_set_bcp(bcp);
91 if (ProfileInterpreter) {
92 // ProfileTraps uses MDOs independently of ProfileInterpreter.
93 // That is why we must check both ProfileInterpreter and mdo != NULL.
94 MethodData* mdo = last_frame(thread).interpreter_frame_method()->method_data();
95 if (mdo != NULL) {
96 NEEDS_CLEANUP;
97 last_frame(thread).interpreter_frame_set_mdp(mdo->bci_to_dp(last_frame(thread).interpreter_frame_bci()));
98 }
99 }
100 }
101
102 //------------------------------------------------------------------------------------------------------------------------
103 // Constants
104
105
106 IRT_ENTRY(void, InterpreterRuntime::ldc(JavaThread* thread, bool wide))
107 // access constant pool
108 ConstantPool* pool = method(thread)->constants();
109 int index = wide ? get_index_u2(thread, Bytecodes::_ldc_w) : get_index_u1(thread, Bytecodes::_ldc);
110 constantTag tag = pool->tag_at(index);
111
112 assert (tag.is_unresolved_klass() || tag.is_klass(), "wrong ldc call");
113 Klass* klass = pool->klass_at(index, CHECK);
114 oop java_class = klass->java_mirror();
115 thread->set_vm_result(java_class);
116 IRT_END
117
118 IRT_ENTRY(void, InterpreterRuntime::resolve_ldc(JavaThread* thread, Bytecodes::Code bytecode)) {
119 assert(bytecode == Bytecodes::_fast_aldc ||
120 bytecode == Bytecodes::_fast_aldc_w, "wrong bc");
121 ResourceMark rm(thread);
122 methodHandle m (thread, method(thread));
123 Bytecode_loadconstant ldc(m, bci(thread));
124 oop result = ldc.resolve_constant(CHECK);
125 #ifdef ASSERT
126 {
127 // The bytecode wrappers aren't GC-safe so construct a new one
128 Bytecode_loadconstant ldc2(m, bci(thread));
129 oop coop = m->constants()->resolved_references()->obj_at(ldc2.cache_index());
130 assert(result == coop, "expected result for assembly code");
131 }
132 #endif
133 thread->set_vm_result(result);
134 }
135 IRT_END
136
137
138 //------------------------------------------------------------------------------------------------------------------------
139 // Allocation
140
141 IRT_ENTRY(void, InterpreterRuntime::_new(JavaThread* thread, ConstantPool* pool, int index))
142 Klass* k_oop = pool->klass_at(index, CHECK);
143 instanceKlassHandle klass (THREAD, k_oop);
144
145 // Make sure we are not instantiating an abstract klass
146 klass->check_valid_for_instantiation(true, CHECK);
147
148 // Make sure klass is initialized
149 klass->initialize(CHECK);
150
151 // At this point the class may not be fully initialized
152 // because of recursive initialization. If it is fully
153 // initialized & has_finalized is not set, we rewrite
154 // it into its fast version (Note: no locking is needed
155 // here since this is an atomic byte write and can be
156 // done more than once).
157 //
158 // Note: In case of classes with has_finalized we don't
159 // rewrite since that saves us an extra check in
160 // the fast version which then would call the
161 // slow version anyway (and do a call back into
162 // Java).
163 // If we have a breakpoint, then we don't rewrite
164 // because the _breakpoint bytecode would be lost.
165 oop obj = klass->allocate_instance(CHECK);
166 thread->set_vm_result(obj);
167 IRT_END
168
169
170 IRT_ENTRY(void, InterpreterRuntime::newarray(JavaThread* thread, BasicType type, jint size))
171 oop obj = oopFactory::new_typeArray(type, size, CHECK);
172 thread->set_vm_result(obj);
173 IRT_END
174
175
176 IRT_ENTRY(void, InterpreterRuntime::anewarray(JavaThread* thread, ConstantPool* pool, int index, jint size))
177 Klass* klass = pool->klass_at(index, CHECK);
178 objArrayOop obj = oopFactory::new_objArray(klass, size, CHECK);
179 thread->set_vm_result(obj);
180 IRT_END
181
182
183 IRT_ENTRY(void, InterpreterRuntime::multianewarray(JavaThread* thread, jint* first_size_address))
184 // We may want to pass in more arguments - could make this slightly faster
185 ConstantPool* constants = method(thread)->constants();
186 int i = get_index_u2(thread, Bytecodes::_multianewarray);
187 Klass* klass = constants->klass_at(i, CHECK);
188 int nof_dims = number_of_dimensions(thread);
189 assert(klass->is_klass(), "not a class");
190 assert(nof_dims >= 1, "multianewarray rank must be nonzero");
191
192 // We must create an array of jints to pass to multi_allocate.
193 ResourceMark rm(thread);
194 const int small_dims = 10;
195 jint dim_array[small_dims];
196 jint *dims = &dim_array[0];
197 if (nof_dims > small_dims) {
198 dims = (jint*) NEW_RESOURCE_ARRAY(jint, nof_dims);
199 }
200 for (int index = 0; index < nof_dims; index++) {
201 // offset from first_size_address is addressed as local[index]
202 int n = Interpreter::local_offset_in_bytes(index)/jintSize;
203 dims[index] = first_size_address[n];
204 }
205 oop obj = ArrayKlass::cast(klass)->multi_allocate(nof_dims, dims, CHECK);
206 thread->set_vm_result(obj);
207 IRT_END
208
209
210 IRT_ENTRY(void, InterpreterRuntime::register_finalizer(JavaThread* thread, oopDesc* obj))
211 assert(obj->is_oop(), "must be a valid oop");
212 assert(obj->klass()->has_finalizer(), "shouldn't be here otherwise");
213 InstanceKlass::register_finalizer(instanceOop(obj), CHECK);
214 IRT_END
215
216
217 // Quicken instance-of and check-cast bytecodes
218 IRT_ENTRY(void, InterpreterRuntime::quicken_io_cc(JavaThread* thread))
219 // Force resolving; quicken the bytecode
220 int which = get_index_u2(thread, Bytecodes::_checkcast);
221 ConstantPool* cpool = method(thread)->constants();
222 // We'd expect to assert that we're only here to quicken bytecodes, but in a multithreaded
223 // program we might have seen an unquick'd bytecode in the interpreter but have another
224 // thread quicken the bytecode before we get here.
225 // assert( cpool->tag_at(which).is_unresolved_klass(), "should only come here to quicken bytecodes" );
226 Klass* klass = cpool->klass_at(which, CHECK);
227 thread->set_vm_result_2(klass);
228 IRT_END
229
230
231 //------------------------------------------------------------------------------------------------------------------------
232 // Exceptions
233
234 void InterpreterRuntime::note_trap_inner(JavaThread* thread, int reason,
235 methodHandle trap_method, int trap_bci, TRAPS) {
236 if (trap_method.not_null()) {
237 MethodData* trap_mdo = trap_method->method_data();
238 if (trap_mdo == NULL) {
239 Method::build_interpreter_method_data(trap_method, THREAD);
240 if (HAS_PENDING_EXCEPTION) {
241 assert((PENDING_EXCEPTION->is_a(SystemDictionary::OutOfMemoryError_klass())),
242 "we expect only an OOM error here");
243 CLEAR_PENDING_EXCEPTION;
244 }
245 trap_mdo = trap_method->method_data();
246 // and fall through...
247 }
248 if (trap_mdo != NULL) {
249 // Update per-method count of trap events. The interpreter
250 // is updating the MDO to simulate the effect of compiler traps.
251 Deoptimization::update_method_data_from_interpreter(trap_mdo, trap_bci, reason);
252 }
253 }
254 }
255
256 // Assume the compiler is (or will be) interested in this event.
257 // If necessary, create an MDO to hold the information, and record it.
258 void InterpreterRuntime::note_trap(JavaThread* thread, int reason, TRAPS) {
259 assert(ProfileTraps, "call me only if profiling");
260 methodHandle trap_method(thread, method(thread));
261 int trap_bci = trap_method->bci_from(bcp(thread));
262 note_trap_inner(thread, reason, trap_method, trap_bci, THREAD);
263 }
264
265 #ifdef CC_INTERP
266 // As legacy note_trap, but we have more arguments.
267 IRT_ENTRY(void, InterpreterRuntime::note_trap(JavaThread* thread, int reason, Method *method, int trap_bci))
268 methodHandle trap_method(method);
269 note_trap_inner(thread, reason, trap_method, trap_bci, THREAD);
270 IRT_END
271
272 // Class Deoptimization is not visible in BytecodeInterpreter, so we need a wrapper
273 // for each exception.
274 void InterpreterRuntime::note_nullCheck_trap(JavaThread* thread, Method *method, int trap_bci)
275 { if (ProfileTraps) note_trap(thread, Deoptimization::Reason_null_check, method, trap_bci); }
276 void InterpreterRuntime::note_div0Check_trap(JavaThread* thread, Method *method, int trap_bci)
277 { if (ProfileTraps) note_trap(thread, Deoptimization::Reason_div0_check, method, trap_bci); }
278 void InterpreterRuntime::note_rangeCheck_trap(JavaThread* thread, Method *method, int trap_bci)
279 { if (ProfileTraps) note_trap(thread, Deoptimization::Reason_range_check, method, trap_bci); }
280 void InterpreterRuntime::note_classCheck_trap(JavaThread* thread, Method *method, int trap_bci)
281 { if (ProfileTraps) note_trap(thread, Deoptimization::Reason_class_check, method, trap_bci); }
282 void InterpreterRuntime::note_arrayCheck_trap(JavaThread* thread, Method *method, int trap_bci)
283 { if (ProfileTraps) note_trap(thread, Deoptimization::Reason_array_check, method, trap_bci); }
284 #endif // CC_INTERP
285
286
287 static Handle get_preinitialized_exception(Klass* k, TRAPS) {
288 // get klass
289 InstanceKlass* klass = InstanceKlass::cast(k);
290 assert(klass->is_initialized(),
291 "this klass should have been initialized during VM initialization");
292 // create instance - do not call constructor since we may have no
293 // (java) stack space left (should assert constructor is empty)
294 Handle exception;
295 oop exception_oop = klass->allocate_instance(CHECK_(exception));
296 exception = Handle(THREAD, exception_oop);
297 if (StackTraceInThrowable) {
298 java_lang_Throwable::fill_in_stack_trace(exception);
299 }
300 return exception;
301 }
302
303 // Special handling for stack overflow: since we don't have any (java) stack
304 // space left we use the pre-allocated & pre-initialized StackOverflowError
305 // klass to create an stack overflow error instance. We do not call its
306 // constructor for the same reason (it is empty, anyway).
307 IRT_ENTRY(void, InterpreterRuntime::throw_StackOverflowError(JavaThread* thread))
308 Handle exception = get_preinitialized_exception(
309 SystemDictionary::StackOverflowError_klass(),
310 CHECK);
311 // Increment counter for hs_err file reporting
312 Atomic::inc(&Exceptions::_stack_overflow_errors);
313 THROW_HANDLE(exception);
314 IRT_END
315
316 IRT_ENTRY(void, InterpreterRuntime::throw_delayed_StackOverflowError(JavaThread* thread))
317 Handle exception = get_preinitialized_exception(
318 SystemDictionary::StackOverflowError_klass(),
319 CHECK);
320 java_lang_Throwable::set_message(exception(),
321 Universe::delayed_stack_overflow_error_message());
322 // Increment counter for hs_err file reporting
323 Atomic::inc(&Exceptions::_stack_overflow_errors);
324 THROW_HANDLE(exception);
325 IRT_END
326
327 IRT_ENTRY(void, InterpreterRuntime::create_exception(JavaThread* thread, char* name, char* message))
328 // lookup exception klass
329 TempNewSymbol s = SymbolTable::new_symbol(name, CHECK);
330 if (ProfileTraps) {
331 if (s == vmSymbols::java_lang_ArithmeticException()) {
332 note_trap(thread, Deoptimization::Reason_div0_check, CHECK);
333 } else if (s == vmSymbols::java_lang_NullPointerException()) {
334 note_trap(thread, Deoptimization::Reason_null_check, CHECK);
335 }
336 }
337 // create exception
338 Handle exception = Exceptions::new_exception(thread, s, message);
339 thread->set_vm_result(exception());
340 IRT_END
341
342
343 IRT_ENTRY(void, InterpreterRuntime::create_klass_exception(JavaThread* thread, char* name, oopDesc* obj))
344 ResourceMark rm(thread);
345 const char* klass_name = obj->klass()->external_name();
346 // lookup exception klass
347 TempNewSymbol s = SymbolTable::new_symbol(name, CHECK);
348 if (ProfileTraps) {
349 note_trap(thread, Deoptimization::Reason_class_check, CHECK);
350 }
351 // create exception, with klass name as detail message
352 Handle exception = Exceptions::new_exception(thread, s, klass_name);
353 thread->set_vm_result(exception());
354 IRT_END
355
356
357 IRT_ENTRY(void, InterpreterRuntime::throw_ArrayIndexOutOfBoundsException(JavaThread* thread, char* name, jint index))
358 char message[jintAsStringSize];
359 // lookup exception klass
360 TempNewSymbol s = SymbolTable::new_symbol(name, CHECK);
361 if (ProfileTraps) {
362 note_trap(thread, Deoptimization::Reason_range_check, CHECK);
363 }
364 // create exception
365 sprintf(message, "%d", index);
366 THROW_MSG(s, message);
367 IRT_END
368
369 IRT_ENTRY(void, InterpreterRuntime::throw_ClassCastException(
370 JavaThread* thread, oopDesc* obj))
371
372 ResourceMark rm(thread);
373 char* message = SharedRuntime::generate_class_cast_message(
374 thread, obj->klass());
375
376 if (ProfileTraps) {
377 note_trap(thread, Deoptimization::Reason_class_check, CHECK);
378 }
379
380 // create exception
381 THROW_MSG(vmSymbols::java_lang_ClassCastException(), message);
382 IRT_END
383
384 // exception_handler_for_exception(...) returns the continuation address,
385 // the exception oop (via TLS) and sets the bci/bcp for the continuation.
386 // The exception oop is returned to make sure it is preserved over GC (it
387 // is only on the stack if the exception was thrown explicitly via athrow).
388 // During this operation, the expression stack contains the values for the
389 // bci where the exception happened. If the exception was propagated back
390 // from a call, the expression stack contains the values for the bci at the
391 // invoke w/o arguments (i.e., as if one were inside the call).
392 IRT_ENTRY(address, InterpreterRuntime::exception_handler_for_exception(JavaThread* thread, oopDesc* exception))
393
394 Handle h_exception(thread, exception);
395 methodHandle h_method (thread, method(thread));
396 constantPoolHandle h_constants(thread, h_method->constants());
397 bool should_repeat;
398 int handler_bci;
399 int current_bci = bci(thread);
400
401 if (thread->frames_to_pop_failed_realloc() > 0) {
402 // Allocation of scalar replaced object used in this frame
403 // failed. Unconditionally pop the frame.
404 thread->dec_frames_to_pop_failed_realloc();
405 thread->set_vm_result(h_exception());
406 // If the method is synchronized we already unlocked the monitor
407 // during deoptimization so the interpreter needs to skip it when
408 // the frame is popped.
409 thread->set_do_not_unlock_if_synchronized(true);
410 #ifdef CC_INTERP
411 return (address) -1;
412 #else
413 return Interpreter::remove_activation_entry();
414 #endif
415 }
416
417 // Need to do this check first since when _do_not_unlock_if_synchronized
418 // is set, we don't want to trigger any classloading which may make calls
419 // into java, or surprisingly find a matching exception handler for bci 0
420 // since at this moment the method hasn't been "officially" entered yet.
421 if (thread->do_not_unlock_if_synchronized()) {
422 ResourceMark rm;
423 assert(current_bci == 0, "bci isn't zero for do_not_unlock_if_synchronized");
424 thread->set_vm_result(exception);
425 #ifdef CC_INTERP
426 return (address) -1;
427 #else
428 return Interpreter::remove_activation_entry();
429 #endif
430 }
431
432 do {
433 should_repeat = false;
434
435 // assertions
436 #ifdef ASSERT
437 assert(h_exception.not_null(), "NULL exceptions should be handled by athrow");
438 assert(h_exception->is_oop(), "just checking");
439 // Check that exception is a subclass of Throwable, otherwise we have a VerifyError
440 if (!(h_exception->is_a(SystemDictionary::Throwable_klass()))) {
441 if (ExitVMOnVerifyError) vm_exit(-1);
442 ShouldNotReachHere();
443 }
444 #endif
445
446 // tracing
447 if (log_is_enabled(Info, exceptions)) {
448 ResourceMark rm(thread);
449 stringStream tempst;
450 tempst.print("interpreter method <%s>\n"
451 " at bci %d for thread " INTPTR_FORMAT,
452 h_method->print_value_string(), current_bci, p2i(thread));
453 Exceptions::log_exception(h_exception, tempst);
454 }
455 // Don't go paging in something which won't be used.
456 // else if (extable->length() == 0) {
457 // // disabled for now - interpreter is not using shortcut yet
458 // // (shortcut is not to call runtime if we have no exception handlers)
459 // // warning("performance bug: should not call runtime if method has no exception handlers");
460 // }
461 // for AbortVMOnException flag
462 Exceptions::debug_check_abort(h_exception);
463
464 // exception handler lookup
465 KlassHandle h_klass(THREAD, h_exception->klass());
466 handler_bci = Method::fast_exception_handler_bci_for(h_method, h_klass, current_bci, THREAD);
467 if (HAS_PENDING_EXCEPTION) {
468 // We threw an exception while trying to find the exception handler.
469 // Transfer the new exception to the exception handle which will
470 // be set into thread local storage, and do another lookup for an
471 // exception handler for this exception, this time starting at the
472 // BCI of the exception handler which caused the exception to be
473 // thrown (bug 4307310).
474 h_exception = Handle(THREAD, PENDING_EXCEPTION);
475 CLEAR_PENDING_EXCEPTION;
476 if (handler_bci >= 0) {
477 current_bci = handler_bci;
478 should_repeat = true;
479 }
480 }
481 } while (should_repeat == true);
482
483 #if INCLUDE_JVMCI
484 if (EnableJVMCI && h_method->method_data() != NULL) {
485 ResourceMark rm(thread);
486 ProfileData* pdata = h_method->method_data()->allocate_bci_to_data(current_bci, NULL);
487 if (pdata != NULL && pdata->is_BitData()) {
488 BitData* bit_data = (BitData*) pdata;
489 bit_data->set_exception_seen();
490 }
491 }
492 #endif
493
494 // notify JVMTI of an exception throw; JVMTI will detect if this is a first
495 // time throw or a stack unwinding throw and accordingly notify the debugger
496 if (JvmtiExport::can_post_on_exceptions()) {
497 JvmtiExport::post_exception_throw(thread, h_method(), bcp(thread), h_exception());
498 }
499
500 #ifdef CC_INTERP
501 address continuation = (address)(intptr_t) handler_bci;
502 #else
503 address continuation = NULL;
504 #endif
505 address handler_pc = NULL;
506 if (handler_bci < 0 || !thread->reguard_stack((address) &continuation)) {
507 // Forward exception to callee (leaving bci/bcp untouched) because (a) no
508 // handler in this method, or (b) after a stack overflow there is not yet
509 // enough stack space available to reprotect the stack.
510 #ifndef CC_INTERP
511 continuation = Interpreter::remove_activation_entry();
512 #endif
513 #if COMPILER2_OR_JVMCI
514 // Count this for compilation purposes
515 h_method->interpreter_throwout_increment(THREAD);
516 #endif
517 } else {
518 // handler in this method => change bci/bcp to handler bci/bcp and continue there
519 handler_pc = h_method->code_base() + handler_bci;
520 #ifndef CC_INTERP
521 set_bcp_and_mdp(handler_pc, thread);
522 continuation = Interpreter::dispatch_table(vtos)[*handler_pc];
523 #endif
524 }
525 // notify debugger of an exception catch
526 // (this is good for exceptions caught in native methods as well)
527 if (JvmtiExport::can_post_on_exceptions()) {
528 JvmtiExport::notice_unwind_due_to_exception(thread, h_method(), handler_pc, h_exception(), (handler_pc != NULL));
529 }
530
531 thread->set_vm_result(h_exception());
532 return continuation;
533 IRT_END
534
535
536 IRT_ENTRY(void, InterpreterRuntime::throw_pending_exception(JavaThread* thread))
537 assert(thread->has_pending_exception(), "must only ne called if there's an exception pending");
538 // nothing to do - eventually we should remove this code entirely (see comments @ call sites)
539 IRT_END
540
541
542 IRT_ENTRY(void, InterpreterRuntime::throw_AbstractMethodError(JavaThread* thread))
543 THROW(vmSymbols::java_lang_AbstractMethodError());
544 IRT_END
545
546
547 IRT_ENTRY(void, InterpreterRuntime::throw_IncompatibleClassChangeError(JavaThread* thread))
548 THROW(vmSymbols::java_lang_IncompatibleClassChangeError());
549 IRT_END
550
551
552 //------------------------------------------------------------------------------------------------------------------------
553 // Fields
554 //
555
556 void InterpreterRuntime::resolve_get_put(JavaThread* thread, Bytecodes::Code bytecode) {
557 Thread* THREAD = thread;
558 // resolve field
559 fieldDescriptor info;
560 constantPoolHandle pool(thread, method(thread)->constants());
561 methodHandle m(thread, method(thread));
562 bool is_put = (bytecode == Bytecodes::_putfield || bytecode == Bytecodes::_nofast_putfield ||
563 bytecode == Bytecodes::_putstatic);
564 bool is_static = (bytecode == Bytecodes::_getstatic || bytecode == Bytecodes::_putstatic);
565
566 {
567 JvmtiHideSingleStepping jhss(thread);
568 LinkResolver::resolve_field_access(info, pool, get_index_u2_cpcache(thread, bytecode),
569 m, bytecode, CHECK);
570 } // end JvmtiHideSingleStepping
571
572 // check if link resolution caused cpCache to be updated
573 ConstantPoolCacheEntry* cp_cache_entry = cache_entry(thread);
574 if (cp_cache_entry->is_resolved(bytecode)) return;
575
576 // compute auxiliary field attributes
577 TosState state = as_TosState(info.field_type());
578
579 // Resolution of put instructions on final fields is delayed. That is required so that
580 // exceptions are thrown at the correct place (when the instruction is actually invoked).
581 // If we do not resolve an instruction in the current pass, leaving the put_code
582 // set to zero will cause the next put instruction to the same field to reresolve.
583
584 // Resolution of put instructions to final instance fields with invalid updates (i.e.,
585 // to final instance fields with updates originating from a method different than <init>)
586 // is inhibited. A putfield instruction targeting an instance final field must throw
587 // an IllegalAccessError if the instruction is not in an instance
588 // initializer method <init>. If resolution were not inhibited, a putfield
589 // in an initializer method could be resolved in the initializer. Subsequent
590 // putfield instructions to the same field would then use cached information.
591 // As a result, those instructions would not pass through the VM. That is,
592 // checks in resolve_field_access() would not be executed for those instructions
593 // and the required IllegalAccessError would not be thrown.
594 //
595 // Also, we need to delay resolving getstatic and putstatic instructions until the
596 // class is initialized. This is required so that access to the static
597 // field will call the initialization function every time until the class
598 // is completely initialized ala. in 2.17.5 in JVM Specification.
599 InstanceKlass* klass = InstanceKlass::cast(info.field_holder());
600 bool uninitialized_static = is_static && !klass->is_initialized();
601 bool has_initialized_final_update = info.field_holder()->major_version() >= 53 &&
602 info.has_initialized_final_update();
603 assert(!(has_initialized_final_update && !info.access_flags().is_final()), "Fields with initialized final updates must be final");
604
605 Bytecodes::Code get_code = (Bytecodes::Code)0;
606 Bytecodes::Code put_code = (Bytecodes::Code)0;
607 if (!uninitialized_static) {
608 get_code = ((is_static) ? Bytecodes::_getstatic : Bytecodes::_getfield);
609 if ((is_put && !has_initialized_final_update) || !info.access_flags().is_final()) {
610 put_code = ((is_static) ? Bytecodes::_putstatic : Bytecodes::_putfield);
611 }
612 }
613
614 cp_cache_entry->set_field(
615 get_code,
616 put_code,
617 info.field_holder(),
618 info.index(),
619 info.offset(),
620 state,
621 info.access_flags().is_final(),
622 info.access_flags().is_volatile(),
623 pool->pool_holder()
624 );
625 }
626
627
628 //------------------------------------------------------------------------------------------------------------------------
629 // Synchronization
630 //
631 // The interpreter's synchronization code is factored out so that it can
632 // be shared by method invocation and synchronized blocks.
633 //%note synchronization_3
634
635 //%note monitor_1
636 IRT_ENTRY_NO_ASYNC(void, InterpreterRuntime::monitorenter(JavaThread* thread, BasicObjectLock* elem))
637 #ifdef ASSERT
638 thread->last_frame().interpreter_frame_verify_monitor(elem);
639 #endif
640 if (PrintBiasedLockingStatistics) {
641 Atomic::inc(BiasedLocking::slow_path_entry_count_addr());
642 }
643 Handle h_obj(thread, elem->obj());
644 assert(Universe::heap()->is_in_reserved_or_null(h_obj()),
645 "must be NULL or an object");
646 if (UseBiasedLocking) {
647 // Retry fast entry if bias is revoked to avoid unnecessary inflation
648 ObjectSynchronizer::fast_enter(h_obj, elem->lock(), true, CHECK);
649 } else {
650 ObjectSynchronizer::slow_enter(h_obj, elem->lock(), CHECK);
651 }
652 assert(Universe::heap()->is_in_reserved_or_null(elem->obj()),
653 "must be NULL or an object");
654 #ifdef ASSERT
655 thread->last_frame().interpreter_frame_verify_monitor(elem);
656 #endif
657 IRT_END
658
659
660 //%note monitor_1
661 IRT_ENTRY_NO_ASYNC(void, InterpreterRuntime::monitorexit(JavaThread* thread, BasicObjectLock* elem))
662 #ifdef ASSERT
663 thread->last_frame().interpreter_frame_verify_monitor(elem);
664 #endif
665 Handle h_obj(thread, elem->obj());
666 assert(Universe::heap()->is_in_reserved_or_null(h_obj()),
667 "must be NULL or an object");
668 if (elem == NULL || h_obj()->is_unlocked()) {
669 THROW(vmSymbols::java_lang_IllegalMonitorStateException());
670 }
671 ObjectSynchronizer::slow_exit(h_obj(), elem->lock(), thread);
672 // Free entry. This must be done here, since a pending exception might be installed on
673 // exit. If it is not cleared, the exception handling code will try to unlock the monitor again.
674 elem->set_obj(NULL);
675 #ifdef ASSERT
676 thread->last_frame().interpreter_frame_verify_monitor(elem);
677 #endif
678 IRT_END
679
680
681 IRT_ENTRY(void, InterpreterRuntime::throw_illegal_monitor_state_exception(JavaThread* thread))
682 THROW(vmSymbols::java_lang_IllegalMonitorStateException());
683 IRT_END
684
685
686 IRT_ENTRY(void, InterpreterRuntime::new_illegal_monitor_state_exception(JavaThread* thread))
687 // Returns an illegal exception to install into the current thread. The
688 // pending_exception flag is cleared so normal exception handling does not
689 // trigger. Any current installed exception will be overwritten. This
690 // method will be called during an exception unwind.
691
692 assert(!HAS_PENDING_EXCEPTION, "no pending exception");
693 Handle exception(thread, thread->vm_result());
694 assert(exception() != NULL, "vm result should be set");
695 thread->set_vm_result(NULL); // clear vm result before continuing (may cause memory leaks and assert failures)
696 if (!exception->is_a(SystemDictionary::ThreadDeath_klass())) {
697 exception = get_preinitialized_exception(
698 SystemDictionary::IllegalMonitorStateException_klass(),
699 CATCH);
700 }
701 thread->set_vm_result(exception());
702 IRT_END
703
704
705 //------------------------------------------------------------------------------------------------------------------------
706 // Invokes
707
708 IRT_ENTRY(Bytecodes::Code, InterpreterRuntime::get_original_bytecode_at(JavaThread* thread, Method* method, address bcp))
709 return method->orig_bytecode_at(method->bci_from(bcp));
710 IRT_END
711
712 IRT_ENTRY(void, InterpreterRuntime::set_original_bytecode_at(JavaThread* thread, Method* method, address bcp, Bytecodes::Code new_code))
713 method->set_orig_bytecode_at(method->bci_from(bcp), new_code);
714 IRT_END
715
716 IRT_ENTRY(void, InterpreterRuntime::_breakpoint(JavaThread* thread, Method* method, address bcp))
717 JvmtiExport::post_raw_breakpoint(thread, method, bcp);
718 IRT_END
719
720 void InterpreterRuntime::resolve_invoke(JavaThread* thread, Bytecodes::Code bytecode) {
721 Thread* THREAD = thread;
722 // extract receiver from the outgoing argument list if necessary
723 Handle receiver(thread, NULL);
724 if (bytecode == Bytecodes::_invokevirtual || bytecode == Bytecodes::_invokeinterface) {
725 ResourceMark rm(thread);
726 methodHandle m (thread, method(thread));
727 Bytecode_invoke call(m, bci(thread));
728 Symbol* signature = call.signature();
729 receiver = Handle(thread,
730 thread->last_frame().interpreter_callee_receiver(signature));
731 assert(Universe::heap()->is_in_reserved_or_null(receiver()),
732 "sanity check");
733 assert(receiver.is_null() ||
734 !Universe::heap()->is_in_reserved(receiver->klass()),
735 "sanity check");
736 }
737
738 // resolve method
739 CallInfo info;
740 constantPoolHandle pool(thread, method(thread)->constants());
741
742 {
743 JvmtiHideSingleStepping jhss(thread);
744 LinkResolver::resolve_invoke(info, receiver, pool,
745 get_index_u2_cpcache(thread, bytecode), bytecode,
746 CHECK);
747 if (JvmtiExport::can_hotswap_or_post_breakpoint()) {
748 int retry_count = 0;
749 while (info.resolved_method()->is_old()) {
750 // It is very unlikely that method is redefined more than 100 times
751 // in the middle of resolve. If it is looping here more than 100 times
752 // means then there could be a bug here.
753 guarantee((retry_count++ < 100),
754 "Could not resolve to latest version of redefined method");
755 // method is redefined in the middle of resolve so re-try.
756 LinkResolver::resolve_invoke(info, receiver, pool,
757 get_index_u2_cpcache(thread, bytecode), bytecode,
758 CHECK);
759 }
760 }
761 } // end JvmtiHideSingleStepping
762
763 // check if link resolution caused cpCache to be updated
764 ConstantPoolCacheEntry* cp_cache_entry = cache_entry(thread);
765 if (cp_cache_entry->is_resolved(bytecode)) return;
766
767 #ifdef ASSERT
768 if (bytecode == Bytecodes::_invokeinterface) {
769 if (info.resolved_method()->method_holder() ==
770 SystemDictionary::Object_klass()) {
771 // NOTE: THIS IS A FIX FOR A CORNER CASE in the JVM spec
772 // (see also CallInfo::set_interface for details)
773 assert(info.call_kind() == CallInfo::vtable_call ||
774 info.call_kind() == CallInfo::direct_call, "");
775 methodHandle rm = info.resolved_method();
776 assert(rm->is_final() || info.has_vtable_index(),
777 "should have been set already");
778 } else if (!info.resolved_method()->has_itable_index()) {
779 // Resolved something like CharSequence.toString. Use vtable not itable.
780 assert(info.call_kind() != CallInfo::itable_call, "");
781 } else {
782 // Setup itable entry
783 assert(info.call_kind() == CallInfo::itable_call, "");
784 int index = info.resolved_method()->itable_index();
785 assert(info.itable_index() == index, "");
786 }
787 } else {
788 assert(info.call_kind() == CallInfo::direct_call ||
789 info.call_kind() == CallInfo::vtable_call, "");
790 }
791 #endif
792 switch (info.call_kind()) {
793 case CallInfo::direct_call:
794 cp_cache_entry->set_direct_call(
795 bytecode,
796 info.resolved_method());
797 break;
798 case CallInfo::vtable_call:
799 cp_cache_entry->set_vtable_call(
800 bytecode,
801 info.resolved_method(),
802 info.vtable_index());
803 break;
804 case CallInfo::itable_call:
805 cp_cache_entry->set_itable_call(
806 bytecode,
807 info.resolved_method(),
808 info.itable_index());
809 break;
810 default: ShouldNotReachHere();
811 }
812 }
813
814
815 // First time execution: Resolve symbols, create a permanent MethodType object.
816 void InterpreterRuntime::resolve_invokehandle(JavaThread* thread) {
817 Thread* THREAD = thread;
818 const Bytecodes::Code bytecode = Bytecodes::_invokehandle;
819
820 // resolve method
821 CallInfo info;
822 constantPoolHandle pool(thread, method(thread)->constants());
823 {
824 JvmtiHideSingleStepping jhss(thread);
825 LinkResolver::resolve_invoke(info, Handle(), pool,
826 get_index_u2_cpcache(thread, bytecode), bytecode,
827 CHECK);
828 } // end JvmtiHideSingleStepping
829
830 ConstantPoolCacheEntry* cp_cache_entry = cache_entry(thread);
831 cp_cache_entry->set_method_handle(pool, info);
832 }
833
834 // First time execution: Resolve symbols, create a permanent CallSite object.
835 void InterpreterRuntime::resolve_invokedynamic(JavaThread* thread) {
836 Thread* THREAD = thread;
837 const Bytecodes::Code bytecode = Bytecodes::_invokedynamic;
838
839 //TO DO: consider passing BCI to Java.
840 // int caller_bci = method(thread)->bci_from(bcp(thread));
841
842 // resolve method
843 CallInfo info;
844 constantPoolHandle pool(thread, method(thread)->constants());
845 int index = get_index_u4(thread, bytecode);
846 {
847 JvmtiHideSingleStepping jhss(thread);
848 LinkResolver::resolve_invoke(info, Handle(), pool,
849 index, bytecode, CHECK);
850 } // end JvmtiHideSingleStepping
851
852 ConstantPoolCacheEntry* cp_cache_entry = pool->invokedynamic_cp_cache_entry_at(index);
853 cp_cache_entry->set_dynamic_call(pool, info);
854 }
855
856 // This function is the interface to the assembly code. It returns the resolved
857 // cpCache entry. This doesn't safepoint, but the helper routines safepoint.
858 // This function will check for redefinition!
859 IRT_ENTRY(void, InterpreterRuntime::resolve_from_cache(JavaThread* thread, Bytecodes::Code bytecode)) {
860 switch (bytecode) {
861 case Bytecodes::_getstatic:
862 case Bytecodes::_putstatic:
863 case Bytecodes::_getfield:
864 case Bytecodes::_putfield:
865 resolve_get_put(thread, bytecode);
866 break;
867 case Bytecodes::_invokevirtual:
868 case Bytecodes::_invokespecial:
869 case Bytecodes::_invokestatic:
870 case Bytecodes::_invokeinterface:
871 resolve_invoke(thread, bytecode);
872 break;
873 case Bytecodes::_invokehandle:
874 resolve_invokehandle(thread);
875 break;
876 case Bytecodes::_invokedynamic:
877 resolve_invokedynamic(thread);
878 break;
879 default:
880 fatal("unexpected bytecode: %s", Bytecodes::name(bytecode));
881 break;
882 }
883 }
884 IRT_END
885
886 //------------------------------------------------------------------------------------------------------------------------
887 // Miscellaneous
888
889
890 nmethod* InterpreterRuntime::frequency_counter_overflow(JavaThread* thread, address branch_bcp) {
891 nmethod* nm = frequency_counter_overflow_inner(thread, branch_bcp);
892 assert(branch_bcp != NULL || nm == NULL, "always returns null for non OSR requests");
893 if (branch_bcp != NULL && nm != NULL) {
894 // This was a successful request for an OSR nmethod. Because
895 // frequency_counter_overflow_inner ends with a safepoint check,
896 // nm could have been unloaded so look it up again. It's unsafe
897 // to examine nm directly since it might have been freed and used
898 // for something else.
899 frame fr = thread->last_frame();
900 Method* method = fr.interpreter_frame_method();
901 int bci = method->bci_from(fr.interpreter_frame_bcp());
902 nm = method->lookup_osr_nmethod_for(bci, CompLevel_none, false);
903 }
904 #ifndef PRODUCT
905 if (TraceOnStackReplacement) {
906 if (nm != NULL) {
907 tty->print("OSR entry @ pc: " INTPTR_FORMAT ": ", p2i(nm->osr_entry()));
908 nm->print();
909 }
910 }
911 #endif
912 return nm;
913 }
914
915 IRT_ENTRY(nmethod*,
916 InterpreterRuntime::frequency_counter_overflow_inner(JavaThread* thread, address branch_bcp))
917 // use UnlockFlagSaver to clear and restore the _do_not_unlock_if_synchronized
918 // flag, in case this method triggers classloading which will call into Java.
919 UnlockFlagSaver fs(thread);
920
921 frame fr = thread->last_frame();
922 assert(fr.is_interpreted_frame(), "must come from interpreter");
923 methodHandle method(thread, fr.interpreter_frame_method());
924 const int branch_bci = branch_bcp != NULL ? method->bci_from(branch_bcp) : InvocationEntryBci;
925 const int bci = branch_bcp != NULL ? method->bci_from(fr.interpreter_frame_bcp()) : InvocationEntryBci;
926
927 assert(!HAS_PENDING_EXCEPTION, "Should not have any exceptions pending");
928 nmethod* osr_nm = CompilationPolicy::policy()->event(method, method, branch_bci, bci, CompLevel_none, NULL, thread);
929 assert(!HAS_PENDING_EXCEPTION, "Event handler should not throw any exceptions");
930
931 if (osr_nm != NULL) {
932 // We may need to do on-stack replacement which requires that no
933 // monitors in the activation are biased because their
934 // BasicObjectLocks will need to migrate during OSR. Force
935 // unbiasing of all monitors in the activation now (even though
936 // the OSR nmethod might be invalidated) because we don't have a
937 // safepoint opportunity later once the migration begins.
938 if (UseBiasedLocking) {
939 ResourceMark rm;
940 GrowableArray<Handle>* objects_to_revoke = new GrowableArray<Handle>();
941 for( BasicObjectLock *kptr = fr.interpreter_frame_monitor_end();
942 kptr < fr.interpreter_frame_monitor_begin();
943 kptr = fr.next_monitor_in_interpreter_frame(kptr) ) {
944 if( kptr->obj() != NULL ) {
945 objects_to_revoke->append(Handle(THREAD, kptr->obj()));
946 }
947 }
948 BiasedLocking::revoke(objects_to_revoke);
949 }
950 }
951 return osr_nm;
952 IRT_END
953
954 IRT_LEAF(jint, InterpreterRuntime::bcp_to_di(Method* method, address cur_bcp))
955 assert(ProfileInterpreter, "must be profiling interpreter");
956 int bci = method->bci_from(cur_bcp);
957 MethodData* mdo = method->method_data();
958 if (mdo == NULL) return 0;
959 return mdo->bci_to_di(bci);
960 IRT_END
961
962 IRT_ENTRY(void, InterpreterRuntime::profile_method(JavaThread* thread))
963 // use UnlockFlagSaver to clear and restore the _do_not_unlock_if_synchronized
964 // flag, in case this method triggers classloading which will call into Java.
965 UnlockFlagSaver fs(thread);
966
967 assert(ProfileInterpreter, "must be profiling interpreter");
968 frame fr = thread->last_frame();
969 assert(fr.is_interpreted_frame(), "must come from interpreter");
970 methodHandle method(thread, fr.interpreter_frame_method());
971 Method::build_interpreter_method_data(method, THREAD);
972 if (HAS_PENDING_EXCEPTION) {
973 assert((PENDING_EXCEPTION->is_a(SystemDictionary::OutOfMemoryError_klass())), "we expect only an OOM error here");
974 CLEAR_PENDING_EXCEPTION;
975 // and fall through...
976 }
977 IRT_END
978
979
980 #ifdef ASSERT
981 IRT_LEAF(void, InterpreterRuntime::verify_mdp(Method* method, address bcp, address mdp))
982 assert(ProfileInterpreter, "must be profiling interpreter");
983
984 MethodData* mdo = method->method_data();
985 assert(mdo != NULL, "must not be null");
986
987 int bci = method->bci_from(bcp);
988
989 address mdp2 = mdo->bci_to_dp(bci);
990 if (mdp != mdp2) {
991 ResourceMark rm;
992 ResetNoHandleMark rnm; // In a LEAF entry.
993 HandleMark hm;
994 tty->print_cr("FAILED verify : actual mdp %p expected mdp %p @ bci %d", mdp, mdp2, bci);
995 int current_di = mdo->dp_to_di(mdp);
996 int expected_di = mdo->dp_to_di(mdp2);
997 tty->print_cr(" actual di %d expected di %d", current_di, expected_di);
998 int expected_approx_bci = mdo->data_at(expected_di)->bci();
999 int approx_bci = -1;
1000 if (current_di >= 0) {
1001 approx_bci = mdo->data_at(current_di)->bci();
1002 }
1003 tty->print_cr(" actual bci is %d expected bci %d", approx_bci, expected_approx_bci);
1004 mdo->print_on(tty);
1005 method->print_codes();
1006 }
1007 assert(mdp == mdp2, "wrong mdp");
1008 IRT_END
1009 #endif // ASSERT
1010
1011 IRT_ENTRY(void, InterpreterRuntime::update_mdp_for_ret(JavaThread* thread, int return_bci))
1012 assert(ProfileInterpreter, "must be profiling interpreter");
1013 ResourceMark rm(thread);
1014 HandleMark hm(thread);
1015 frame fr = thread->last_frame();
1016 assert(fr.is_interpreted_frame(), "must come from interpreter");
1017 MethodData* h_mdo = fr.interpreter_frame_method()->method_data();
1018
1019 // Grab a lock to ensure atomic access to setting the return bci and
1020 // the displacement. This can block and GC, invalidating all naked oops.
1021 MutexLocker ml(RetData_lock);
1022
1023 // ProfileData is essentially a wrapper around a derived oop, so we
1024 // need to take the lock before making any ProfileData structures.
1025 ProfileData* data = h_mdo->data_at(h_mdo->dp_to_di(fr.interpreter_frame_mdp()));
1026 RetData* rdata = data->as_RetData();
1027 address new_mdp = rdata->fixup_ret(return_bci, h_mdo);
1028 fr.interpreter_frame_set_mdp(new_mdp);
1029 IRT_END
1030
1031 IRT_ENTRY(MethodCounters*, InterpreterRuntime::build_method_counters(JavaThread* thread, Method* m))
1032 MethodCounters* mcs = Method::build_method_counters(m, thread);
1033 if (HAS_PENDING_EXCEPTION) {
1034 assert((PENDING_EXCEPTION->is_a(SystemDictionary::OutOfMemoryError_klass())), "we expect only an OOM error here");
1035 CLEAR_PENDING_EXCEPTION;
1036 }
1037 return mcs;
1038 IRT_END
1039
1040
1041 IRT_ENTRY(void, InterpreterRuntime::at_safepoint(JavaThread* thread))
1042 // We used to need an explict preserve_arguments here for invoke bytecodes. However,
1043 // stack traversal automatically takes care of preserving arguments for invoke, so
1044 // this is no longer needed.
1045
1046 // IRT_END does an implicit safepoint check, hence we are guaranteed to block
1047 // if this is called during a safepoint
1048
1049 if (JvmtiExport::should_post_single_step()) {
1050 // We are called during regular safepoints and when the VM is
1051 // single stepping. If any thread is marked for single stepping,
1052 // then we may have JVMTI work to do.
1053 JvmtiExport::at_single_stepping_point(thread, method(thread), bcp(thread));
1054 }
1055 IRT_END
1056
1057 IRT_ENTRY(void, InterpreterRuntime::post_field_access(JavaThread *thread, oopDesc* obj,
1058 ConstantPoolCacheEntry *cp_entry))
1059
1060 // check the access_flags for the field in the klass
1061
1062 InstanceKlass* ik = InstanceKlass::cast(cp_entry->f1_as_klass());
1063 int index = cp_entry->field_index();
1064 if ((ik->field_access_flags(index) & JVM_ACC_FIELD_ACCESS_WATCHED) == 0) return;
1065
1066 bool is_static = (obj == NULL);
1067 HandleMark hm(thread);
1068
1069 Handle h_obj;
1070 if (!is_static) {
1071 // non-static field accessors have an object, but we need a handle
1072 h_obj = Handle(thread, obj);
1073 }
1074 instanceKlassHandle h_cp_entry_f1(thread, (Klass*)cp_entry->f1_as_klass());
1075 jfieldID fid = jfieldIDWorkaround::to_jfieldID(h_cp_entry_f1, cp_entry->f2_as_index(), is_static);
1076 JvmtiExport::post_field_access(thread, method(thread), bcp(thread), h_cp_entry_f1, h_obj, fid);
1077 IRT_END
1078
1079 IRT_ENTRY(void, InterpreterRuntime::post_field_modification(JavaThread *thread,
1080 oopDesc* obj, ConstantPoolCacheEntry *cp_entry, jvalue *value))
1081
1082 Klass* k = (Klass*)cp_entry->f1_as_klass();
1083
1084 // check the access_flags for the field in the klass
1085 InstanceKlass* ik = InstanceKlass::cast(k);
1086 int index = cp_entry->field_index();
1087 // bail out if field modifications are not watched
1088 if ((ik->field_access_flags(index) & JVM_ACC_FIELD_MODIFICATION_WATCHED) == 0) return;
1089
1090 char sig_type = '\0';
1091
1092 switch(cp_entry->flag_state()) {
1093 case btos: sig_type = 'B'; break;
1094 case ztos: sig_type = 'Z'; break;
1095 case ctos: sig_type = 'C'; break;
1096 case stos: sig_type = 'S'; break;
1097 case itos: sig_type = 'I'; break;
1098 case ftos: sig_type = 'F'; break;
1099 case atos: sig_type = 'L'; break;
1100 case ltos: sig_type = 'J'; break;
1101 case dtos: sig_type = 'D'; break;
1102 default: ShouldNotReachHere(); return;
1103 }
1104 bool is_static = (obj == NULL);
1105
1106 HandleMark hm(thread);
1107 instanceKlassHandle h_klass(thread, k);
1108 jfieldID fid = jfieldIDWorkaround::to_jfieldID(h_klass, cp_entry->f2_as_index(), is_static);
1109 jvalue fvalue;
1110 #ifdef _LP64
1111 fvalue = *value;
1112 #else
1113 // Long/double values are stored unaligned and also noncontiguously with
1114 // tagged stacks. We can't just do a simple assignment even in the non-
1115 // J/D cases because a C++ compiler is allowed to assume that a jvalue is
1116 // 8-byte aligned, and interpreter stack slots are only 4-byte aligned.
1117 // We assume that the two halves of longs/doubles are stored in interpreter
1118 // stack slots in platform-endian order.
1119 jlong_accessor u;
1120 jint* newval = (jint*)value;
1121 u.words[0] = newval[0];
1122 u.words[1] = newval[Interpreter::stackElementWords]; // skip if tag
1123 fvalue.j = u.long_value;
1124 #endif // _LP64
1125
1126 Handle h_obj;
1127 if (!is_static) {
1128 // non-static field accessors have an object, but we need a handle
1129 h_obj = Handle(thread, obj);
1130 }
1131
1132 JvmtiExport::post_raw_field_modification(thread, method(thread), bcp(thread), h_klass, h_obj,
1133 fid, sig_type, &fvalue);
1134 IRT_END
1135
1136 IRT_ENTRY(void, InterpreterRuntime::post_method_entry(JavaThread *thread))
1137 JvmtiExport::post_method_entry(thread, InterpreterRuntime::method(thread), InterpreterRuntime::last_frame(thread));
1138 IRT_END
1139
1140
1141 IRT_ENTRY(void, InterpreterRuntime::post_method_exit(JavaThread *thread))
1142 JvmtiExport::post_method_exit(thread, InterpreterRuntime::method(thread), InterpreterRuntime::last_frame(thread));
1143 IRT_END
1144
1145 IRT_LEAF(int, InterpreterRuntime::interpreter_contains(address pc))
1146 {
1147 return (Interpreter::contains(pc) ? 1 : 0);
1148 }
1149 IRT_END
1150
1151
1152 // Implementation of SignatureHandlerLibrary
1153
1154 #ifndef SHARING_FAST_NATIVE_FINGERPRINTS
1155 // Dummy definition (else normalization method is defined in CPU
1156 // dependant code)
1157 uint64_t InterpreterRuntime::normalize_fast_native_fingerprint(uint64_t fingerprint) {
1158 return fingerprint;
1159 }
1160 #endif
1161
1162 address SignatureHandlerLibrary::set_handler_blob() {
1163 BufferBlob* handler_blob = BufferBlob::create("native signature handlers", blob_size);
1164 if (handler_blob == NULL) {
1165 return NULL;
1166 }
1167 address handler = handler_blob->code_begin();
1168 _handler_blob = handler_blob;
1169 _handler = handler;
1170 return handler;
1171 }
1172
1173 void SignatureHandlerLibrary::initialize() {
1174 if (_fingerprints != NULL) {
1175 return;
1176 }
1177 if (set_handler_blob() == NULL) {
1178 vm_exit_out_of_memory(blob_size, OOM_MALLOC_ERROR, "native signature handlers");
1179 }
1180
1181 BufferBlob* bb = BufferBlob::create("Signature Handler Temp Buffer",
1182 SignatureHandlerLibrary::buffer_size);
1183 _buffer = bb->code_begin();
1184
1185 _fingerprints = new(ResourceObj::C_HEAP, mtCode)GrowableArray<uint64_t>(32, true);
1186 _handlers = new(ResourceObj::C_HEAP, mtCode)GrowableArray<address>(32, true);
1187 }
1188
1189 address SignatureHandlerLibrary::set_handler(CodeBuffer* buffer) {
1190 address handler = _handler;
1191 int insts_size = buffer->pure_insts_size();
1192 if (handler + insts_size > _handler_blob->code_end()) {
1193 // get a new handler blob
1194 handler = set_handler_blob();
1195 }
1196 if (handler != NULL) {
1197 memcpy(handler, buffer->insts_begin(), insts_size);
1198 pd_set_handler(handler);
1199 ICache::invalidate_range(handler, insts_size);
1200 _handler = handler + insts_size;
1201 }
1202 CodeCacheExtensions::handle_generated_handler(handler, buffer->name(), _handler);
1203 return handler;
1204 }
1205
1206 void SignatureHandlerLibrary::add(const methodHandle& method) {
1207 if (method->signature_handler() == NULL) {
1208 // use slow signature handler if we can't do better
1209 int handler_index = -1;
1210 // check if we can use customized (fast) signature handler
1211 if (UseFastSignatureHandlers && CodeCacheExtensions::support_fast_signature_handlers() && method->size_of_parameters() <= Fingerprinter::max_size_of_parameters) {
1212 // use customized signature handler
1213 MutexLocker mu(SignatureHandlerLibrary_lock);
1214 // make sure data structure is initialized
1215 initialize();
1216 // lookup method signature's fingerprint
1217 uint64_t fingerprint = Fingerprinter(method).fingerprint();
1218 // allow CPU dependant code to optimize the fingerprints for the fast handler
1219 fingerprint = InterpreterRuntime::normalize_fast_native_fingerprint(fingerprint);
1220 handler_index = _fingerprints->find(fingerprint);
1221 // create handler if necessary
1222 if (handler_index < 0) {
1223 ResourceMark rm;
1224 ptrdiff_t align_offset = (address)
1225 round_to((intptr_t)_buffer, CodeEntryAlignment) - (address)_buffer;
1226 CodeBuffer buffer((address)(_buffer + align_offset),
1227 SignatureHandlerLibrary::buffer_size - align_offset);
1228 if (!CodeCacheExtensions::support_dynamic_code()) {
1229 // we need a name for the signature (for lookups or saving)
1230 const int SYMBOL_SIZE = 50;
1231 char *symbolName = NEW_RESOURCE_ARRAY(char, SYMBOL_SIZE);
1232 // support for named signatures
1233 jio_snprintf(symbolName, SYMBOL_SIZE,
1234 "native_" UINT64_FORMAT, fingerprint);
1235 buffer.set_name(symbolName);
1236 }
1237 InterpreterRuntime::SignatureHandlerGenerator(method, &buffer).generate(fingerprint);
1238 // copy into code heap
1239 address handler = set_handler(&buffer);
1240 if (handler == NULL) {
1241 // use slow signature handler (without memorizing it in the fingerprints)
1242 } else {
1243 // debugging suppport
1244 if (PrintSignatureHandlers && (handler != Interpreter::slow_signature_handler())) {
1245 ttyLocker ttyl;
1246 tty->cr();
1247 tty->print_cr("argument handler #%d for: %s %s (fingerprint = " UINT64_FORMAT ", %d bytes generated)",
1248 _handlers->length(),
1249 (method->is_static() ? "static" : "receiver"),
1250 method->name_and_sig_as_C_string(),
1251 fingerprint,
1252 buffer.insts_size());
1253 if (buffer.insts_size() > 0) {
1254 // buffer may be empty for pregenerated handlers
1255 Disassembler::decode(handler, handler + buffer.insts_size());
1256 }
1257 #ifndef PRODUCT
1258 address rh_begin = Interpreter::result_handler(method()->result_type());
1259 if (CodeCache::contains(rh_begin)) {
1260 // else it might be special platform dependent values
1261 tty->print_cr(" --- associated result handler ---");
1262 address rh_end = rh_begin;
1263 while (*(int*)rh_end != 0) {
1264 rh_end += sizeof(int);
1265 }
1266 Disassembler::decode(rh_begin, rh_end);
1267 } else {
1268 tty->print_cr(" associated result handler: " PTR_FORMAT, p2i(rh_begin));
1269 }
1270 #endif
1271 }
1272 // add handler to library
1273 _fingerprints->append(fingerprint);
1274 _handlers->append(handler);
1275 // set handler index
1276 assert(_fingerprints->length() == _handlers->length(), "sanity check");
1277 handler_index = _fingerprints->length() - 1;
1278 }
1279 }
1280 // Set handler under SignatureHandlerLibrary_lock
1281 if (handler_index < 0) {
1282 // use generic signature handler
1283 method->set_signature_handler(Interpreter::slow_signature_handler());
1284 } else {
1285 // set handler
1286 method->set_signature_handler(_handlers->at(handler_index));
1287 }
1288 } else {
1289 CHECK_UNHANDLED_OOPS_ONLY(Thread::current()->clear_unhandled_oops());
1290 // use generic signature handler
1291 method->set_signature_handler(Interpreter::slow_signature_handler());
1292 }
1293 }
1294 #ifdef ASSERT
1295 int handler_index = -1;
1296 int fingerprint_index = -2;
1297 {
1298 // '_handlers' and '_fingerprints' are 'GrowableArray's and are NOT synchronized
1299 // in any way if accessed from multiple threads. To avoid races with another
1300 // thread which may change the arrays in the above, mutex protected block, we
1301 // have to protect this read access here with the same mutex as well!
1302 MutexLocker mu(SignatureHandlerLibrary_lock);
1303 if (_handlers != NULL) {
1304 handler_index = _handlers->find(method->signature_handler());
1305 uint64_t fingerprint = Fingerprinter(method).fingerprint();
1306 fingerprint = InterpreterRuntime::normalize_fast_native_fingerprint(fingerprint);
1307 fingerprint_index = _fingerprints->find(fingerprint);
1308 }
1309 }
1310 assert(method->signature_handler() == Interpreter::slow_signature_handler() ||
1311 handler_index == fingerprint_index, "sanity check");
1312 #endif // ASSERT
1313 }
1314
1315 void SignatureHandlerLibrary::add(uint64_t fingerprint, address handler) {
1316 int handler_index = -1;
1317 // use customized signature handler
1318 MutexLocker mu(SignatureHandlerLibrary_lock);
1319 // make sure data structure is initialized
1320 initialize();
1321 fingerprint = InterpreterRuntime::normalize_fast_native_fingerprint(fingerprint);
1322 handler_index = _fingerprints->find(fingerprint);
1323 // create handler if necessary
1324 if (handler_index < 0) {
1325 if (PrintSignatureHandlers && (handler != Interpreter::slow_signature_handler())) {
1326 tty->cr();
1327 tty->print_cr("argument handler #%d at " PTR_FORMAT " for fingerprint " UINT64_FORMAT,
1328 _handlers->length(),
1329 p2i(handler),
1330 fingerprint);
1331 }
1332 _fingerprints->append(fingerprint);
1333 _handlers->append(handler);
1334 } else {
1335 if (PrintSignatureHandlers) {
1336 tty->cr();
1337 tty->print_cr("duplicate argument handler #%d for fingerprint " UINT64_FORMAT "(old: " PTR_FORMAT ", new : " PTR_FORMAT ")",
1338 _handlers->length(),
1339 fingerprint,
1340 p2i(_handlers->at(handler_index)),
1341 p2i(handler));
1342 }
1343 }
1344 }
1345
1346
1347 BufferBlob* SignatureHandlerLibrary::_handler_blob = NULL;
1348 address SignatureHandlerLibrary::_handler = NULL;
1349 GrowableArray<uint64_t>* SignatureHandlerLibrary::_fingerprints = NULL;
1350 GrowableArray<address>* SignatureHandlerLibrary::_handlers = NULL;
1351 address SignatureHandlerLibrary::_buffer = NULL;
1352
1353
1354 IRT_ENTRY(void, InterpreterRuntime::prepare_native_call(JavaThread* thread, Method* method))
1355 methodHandle m(thread, method);
1356 assert(m->is_native(), "sanity check");
1357 // lookup native function entry point if it doesn't exist
1358 bool in_base_library;
1359 if (!m->has_native_function()) {
1360 NativeLookup::lookup(m, in_base_library, CHECK);
1361 }
1362 // make sure signature handler is installed
1363 SignatureHandlerLibrary::add(m);
1364 // The interpreter entry point checks the signature handler first,
1365 // before trying to fetch the native entry point and klass mirror.
1366 // We must set the signature handler last, so that multiple processors
1367 // preparing the same method will be sure to see non-null entry & mirror.
1368 IRT_END
1369
1370 #if defined(IA32) || defined(AMD64) || defined(ARM)
1371 IRT_LEAF(void, InterpreterRuntime::popframe_move_outgoing_args(JavaThread* thread, void* src_address, void* dest_address))
1372 if (src_address == dest_address) {
1373 return;
1374 }
1375 ResetNoHandleMark rnm; // In a LEAF entry.
1376 HandleMark hm;
1377 ResourceMark rm;
1378 frame fr = thread->last_frame();
1379 assert(fr.is_interpreted_frame(), "");
1380 jint bci = fr.interpreter_frame_bci();
1381 methodHandle mh(thread, fr.interpreter_frame_method());
1382 Bytecode_invoke invoke(mh, bci);
1383 ArgumentSizeComputer asc(invoke.signature());
1384 int size_of_arguments = (asc.size() + (invoke.has_receiver() ? 1 : 0)); // receiver
1385 Copy::conjoint_jbytes(src_address, dest_address,
1386 size_of_arguments * Interpreter::stackElementSize);
1387 IRT_END
1388 #endif
1389
1390 #if INCLUDE_JVMTI
1391 // This is a support of the JVMTI PopFrame interface.
1392 // Make sure it is an invokestatic of a polymorphic intrinsic that has a member_name argument
1393 // and return it as a vm_result so that it can be reloaded in the list of invokestatic parameters.
1394 // The member_name argument is a saved reference (in local#0) to the member_name.
1395 // For backward compatibility with some JDK versions (7, 8) it can also be a direct method handle.
1396 // FIXME: remove DMH case after j.l.i.InvokerBytecodeGenerator code shape is updated.
1397 IRT_ENTRY(void, InterpreterRuntime::member_name_arg_or_null(JavaThread* thread, address member_name,
1398 Method* method, address bcp))
1399 Bytecodes::Code code = Bytecodes::code_at(method, bcp);
1400 if (code != Bytecodes::_invokestatic) {
1401 return;
1402 }
1403 ConstantPool* cpool = method->constants();
1404 int cp_index = Bytes::get_native_u2(bcp + 1) + ConstantPool::CPCACHE_INDEX_TAG;
1405 Symbol* cname = cpool->klass_name_at(cpool->klass_ref_index_at(cp_index));
1406 Symbol* mname = cpool->name_ref_at(cp_index);
1407
1408 if (MethodHandles::has_member_arg(cname, mname)) {
1409 oop member_name_oop = (oop) member_name;
1410 if (java_lang_invoke_DirectMethodHandle::is_instance(member_name_oop)) {
1411 // FIXME: remove after j.l.i.InvokerBytecodeGenerator code shape is updated.
1412 member_name_oop = java_lang_invoke_DirectMethodHandle::member(member_name_oop);
1413 }
1414 thread->set_vm_result(member_name_oop);
1415 } else {
1416 thread->set_vm_result(NULL);
1417 }
1418 IRT_END
1419 #endif // INCLUDE_JVMTI
1420
1421 #ifndef PRODUCT
1422 // This must be a IRT_LEAF function because the interpreter must save registers on x86 to
1423 // call this, which changes rsp and makes the interpreter's expression stack not walkable.
1424 // The generated code still uses call_VM because that will set up the frame pointer for
1425 // bcp and method.
1426 IRT_LEAF(intptr_t, InterpreterRuntime::trace_bytecode(JavaThread* thread, intptr_t preserve_this_value, intptr_t tos, intptr_t tos2))
1427 const frame f = thread->last_frame();
1428 assert(f.is_interpreted_frame(), "must be an interpreted frame");
1429 methodHandle mh(thread, f.interpreter_frame_method());
1430 BytecodeTracer::trace(mh, f.interpreter_frame_bcp(), tos, tos2);
1431 return preserve_this_value;
1432 IRT_END
1433 #endif // !PRODUCT