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
319 IRT_ENTRY(void, InterpreterRuntime::create_exception(JavaThread* thread, char* name, char* message))
320 // lookup exception klass
321 TempNewSymbol s = SymbolTable::new_symbol(name, CHECK);
322 if (ProfileTraps) {
323 if (s == vmSymbols::java_lang_ArithmeticException()) {
324 note_trap(thread, Deoptimization::Reason_div0_check, CHECK);
325 } else if (s == vmSymbols::java_lang_NullPointerException()) {
326 note_trap(thread, Deoptimization::Reason_null_check, CHECK);
327 }
328 }
329 // create exception
330 Handle exception = Exceptions::new_exception(thread, s, message);
331 thread->set_vm_result(exception());
332 IRT_END
333
334
335 IRT_ENTRY(void, InterpreterRuntime::create_klass_exception(JavaThread* thread, char* name, oopDesc* obj))
336 ResourceMark rm(thread);
337 const char* klass_name = obj->klass()->external_name();
338 // lookup exception klass
339 TempNewSymbol s = SymbolTable::new_symbol(name, CHECK);
340 if (ProfileTraps) {
341 note_trap(thread, Deoptimization::Reason_class_check, CHECK);
342 }
343 // create exception, with klass name as detail message
344 Handle exception = Exceptions::new_exception(thread, s, klass_name);
345 thread->set_vm_result(exception());
346 IRT_END
347
348
349 IRT_ENTRY(void, InterpreterRuntime::throw_ArrayIndexOutOfBoundsException(JavaThread* thread, char* name, jint index))
350 char message[jintAsStringSize];
351 // lookup exception klass
352 TempNewSymbol s = SymbolTable::new_symbol(name, CHECK);
353 if (ProfileTraps) {
354 note_trap(thread, Deoptimization::Reason_range_check, CHECK);
355 }
356 // create exception
357 sprintf(message, "%d", index);
358 THROW_MSG(s, message);
359 IRT_END
360
361 IRT_ENTRY(void, InterpreterRuntime::throw_ClassCastException(
362 JavaThread* thread, oopDesc* obj))
363
364 ResourceMark rm(thread);
365 char* message = SharedRuntime::generate_class_cast_message(
366 thread, obj->klass()->external_name());
367
368 if (ProfileTraps) {
369 note_trap(thread, Deoptimization::Reason_class_check, CHECK);
370 }
371
372 // create exception
373 THROW_MSG(vmSymbols::java_lang_ClassCastException(), message);
374 IRT_END
375
376 // exception_handler_for_exception(...) returns the continuation address,
377 // the exception oop (via TLS) and sets the bci/bcp for the continuation.
378 // The exception oop is returned to make sure it is preserved over GC (it
379 // is only on the stack if the exception was thrown explicitly via athrow).
380 // During this operation, the expression stack contains the values for the
381 // bci where the exception happened. If the exception was propagated back
382 // from a call, the expression stack contains the values for the bci at the
383 // invoke w/o arguments (i.e., as if one were inside the call).
384 IRT_ENTRY(address, InterpreterRuntime::exception_handler_for_exception(JavaThread* thread, oopDesc* exception))
385
386 Handle h_exception(thread, exception);
387 methodHandle h_method (thread, method(thread));
388 constantPoolHandle h_constants(thread, h_method->constants());
389 bool should_repeat;
390 int handler_bci;
391 int current_bci = bci(thread);
392
393 if (thread->frames_to_pop_failed_realloc() > 0) {
394 // Allocation of scalar replaced object used in this frame
395 // failed. Unconditionally pop the frame.
396 thread->dec_frames_to_pop_failed_realloc();
397 thread->set_vm_result(h_exception());
398 // If the method is synchronized we already unlocked the monitor
399 // during deoptimization so the interpreter needs to skip it when
400 // the frame is popped.
401 thread->set_do_not_unlock_if_synchronized(true);
402 #ifdef CC_INTERP
403 return (address) -1;
404 #else
405 return Interpreter::remove_activation_entry();
406 #endif
407 }
408
409 // Need to do this check first since when _do_not_unlock_if_synchronized
410 // is set, we don't want to trigger any classloading which may make calls
411 // into java, or surprisingly find a matching exception handler for bci 0
412 // since at this moment the method hasn't been "officially" entered yet.
413 if (thread->do_not_unlock_if_synchronized()) {
414 ResourceMark rm;
415 assert(current_bci == 0, "bci isn't zero for do_not_unlock_if_synchronized");
416 thread->set_vm_result(exception);
417 #ifdef CC_INTERP
418 return (address) -1;
419 #else
420 return Interpreter::remove_activation_entry();
421 #endif
422 }
423
424 do {
425 should_repeat = false;
426
427 // assertions
428 #ifdef ASSERT
429 assert(h_exception.not_null(), "NULL exceptions should be handled by athrow");
430 assert(h_exception->is_oop(), "just checking");
431 // Check that exception is a subclass of Throwable, otherwise we have a VerifyError
432 if (!(h_exception->is_a(SystemDictionary::Throwable_klass()))) {
433 if (ExitVMOnVerifyError) vm_exit(-1);
434 ShouldNotReachHere();
435 }
436 #endif
437
438 // tracing
439 if (TraceExceptions) {
440 ResourceMark rm(thread);
441 Symbol* message = java_lang_Throwable::detail_message(h_exception());
442 ttyLocker ttyl; // Lock after getting the detail message
443 if (message != NULL) {
444 tty->print_cr("Exception <%s: %s> (" INTPTR_FORMAT ")",
445 h_exception->print_value_string(), message->as_C_string(),
446 p2i(h_exception()));
447 } else {
448 tty->print_cr("Exception <%s> (" INTPTR_FORMAT ")",
449 h_exception->print_value_string(),
450 p2i(h_exception()));
451 }
452 tty->print_cr(" thrown in interpreter method <%s>", h_method->print_value_string());
453 tty->print_cr(" at bci %d for thread " INTPTR_FORMAT, current_bci, p2i(thread));
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 // Count this for compilation purposes
514 h_method->interpreter_throwout_increment(THREAD);
515 } else {
516 // handler in this method => change bci/bcp to handler bci/bcp and continue there
517 handler_pc = h_method->code_base() + handler_bci;
518 #ifndef CC_INTERP
519 set_bcp_and_mdp(handler_pc, thread);
520 continuation = Interpreter::dispatch_table(vtos)[*handler_pc];
521 #endif
522 }
523 // notify debugger of an exception catch
524 // (this is good for exceptions caught in native methods as well)
525 if (JvmtiExport::can_post_on_exceptions()) {
526 JvmtiExport::notice_unwind_due_to_exception(thread, h_method(), handler_pc, h_exception(), (handler_pc != NULL));
527 }
528
529 thread->set_vm_result(h_exception());
530 return continuation;
531 IRT_END
532
533
534 IRT_ENTRY(void, InterpreterRuntime::throw_pending_exception(JavaThread* thread))
535 assert(thread->has_pending_exception(), "must only ne called if there's an exception pending");
536 // nothing to do - eventually we should remove this code entirely (see comments @ call sites)
537 IRT_END
538
539
540 IRT_ENTRY(void, InterpreterRuntime::throw_AbstractMethodError(JavaThread* thread))
541 THROW(vmSymbols::java_lang_AbstractMethodError());
542 IRT_END
543
544
545 IRT_ENTRY(void, InterpreterRuntime::throw_IncompatibleClassChangeError(JavaThread* thread))
546 THROW(vmSymbols::java_lang_IncompatibleClassChangeError());
547 IRT_END
548
549
550 //------------------------------------------------------------------------------------------------------------------------
551 // Fields
552 //
553
554 void InterpreterRuntime::resolve_get_put(JavaThread* thread, Bytecodes::Code bytecode) {
555 Thread* THREAD = thread;
556 // resolve field
557 fieldDescriptor info;
558 constantPoolHandle pool(thread, method(thread)->constants());
559 bool is_put = (bytecode == Bytecodes::_putfield || bytecode == Bytecodes::_nofast_putfield ||
560 bytecode == Bytecodes::_putstatic);
561 bool is_static = (bytecode == Bytecodes::_getstatic || bytecode == Bytecodes::_putstatic);
562
563 {
564 JvmtiHideSingleStepping jhss(thread);
565 LinkResolver::resolve_field_access(info, pool, get_index_u2_cpcache(thread, bytecode),
566 bytecode, CHECK);
567 } // end JvmtiHideSingleStepping
568
569 // check if link resolution caused cpCache to be updated
570 ConstantPoolCacheEntry* cp_cache_entry = cache_entry(thread);
571 if (cp_cache_entry->is_resolved(bytecode)) return;
572
573 // compute auxiliary field attributes
574 TosState state = as_TosState(info.field_type());
575
576 // We need to delay resolving put instructions on final fields
577 // until we actually invoke one. This is required so we throw
578 // exceptions at the correct place. If we do not resolve completely
579 // in the current pass, leaving the put_code set to zero will
580 // cause the next put instruction to reresolve.
581 Bytecodes::Code put_code = (Bytecodes::Code)0;
582
583 // We also need to delay resolving getstatic instructions until the
584 // class is intitialized. This is required so that access to the static
585 // field will call the initialization function every time until the class
586 // is completely initialized ala. in 2.17.5 in JVM Specification.
587 InstanceKlass* klass = InstanceKlass::cast(info.field_holder());
588 bool uninitialized_static = ((bytecode == Bytecodes::_getstatic || bytecode == Bytecodes::_putstatic) &&
589 !klass->is_initialized());
590 Bytecodes::Code get_code = (Bytecodes::Code)0;
591
592 if (!uninitialized_static) {
593 get_code = ((is_static) ? Bytecodes::_getstatic : Bytecodes::_getfield);
594 if (is_put || !info.access_flags().is_final()) {
595 put_code = ((is_static) ? Bytecodes::_putstatic : Bytecodes::_putfield);
596 }
597 }
598
599 cp_cache_entry->set_field(
600 get_code,
601 put_code,
602 info.field_holder(),
603 info.index(),
604 info.offset(),
605 state,
606 info.access_flags().is_final(),
607 info.access_flags().is_volatile(),
608 pool->pool_holder()
609 );
610 }
611
612
613 //------------------------------------------------------------------------------------------------------------------------
614 // Synchronization
615 //
616 // The interpreter's synchronization code is factored out so that it can
617 // be shared by method invocation and synchronized blocks.
618 //%note synchronization_3
619
620 //%note monitor_1
621 IRT_ENTRY_NO_ASYNC(void, InterpreterRuntime::monitorenter(JavaThread* thread, BasicObjectLock* elem))
622 #ifdef ASSERT
623 thread->last_frame().interpreter_frame_verify_monitor(elem);
624 #endif
625 if (PrintBiasedLockingStatistics) {
626 Atomic::inc(BiasedLocking::slow_path_entry_count_addr());
627 }
628 Handle h_obj(thread, elem->obj());
629 assert(Universe::heap()->is_in_reserved_or_null(h_obj()),
630 "must be NULL or an object");
631 if (UseBiasedLocking) {
632 // Retry fast entry if bias is revoked to avoid unnecessary inflation
633 ObjectSynchronizer::fast_enter(h_obj, elem->lock(), true, CHECK);
634 } else {
635 ObjectSynchronizer::slow_enter(h_obj, elem->lock(), CHECK);
636 }
637 assert(Universe::heap()->is_in_reserved_or_null(elem->obj()),
638 "must be NULL or an object");
639 #ifdef ASSERT
640 thread->last_frame().interpreter_frame_verify_monitor(elem);
641 #endif
642 IRT_END
643
644
645 //%note monitor_1
646 IRT_ENTRY_NO_ASYNC(void, InterpreterRuntime::monitorexit(JavaThread* thread, BasicObjectLock* elem))
647 #ifdef ASSERT
648 thread->last_frame().interpreter_frame_verify_monitor(elem);
649 #endif
650 Handle h_obj(thread, elem->obj());
651 assert(Universe::heap()->is_in_reserved_or_null(h_obj()),
652 "must be NULL or an object");
653 if (elem == NULL || h_obj()->is_unlocked()) {
654 THROW(vmSymbols::java_lang_IllegalMonitorStateException());
655 }
656 ObjectSynchronizer::slow_exit(h_obj(), elem->lock(), thread);
657 // Free entry. This must be done here, since a pending exception might be installed on
658 // exit. If it is not cleared, the exception handling code will try to unlock the monitor again.
659 elem->set_obj(NULL);
660 #ifdef ASSERT
661 thread->last_frame().interpreter_frame_verify_monitor(elem);
662 #endif
663 IRT_END
664
665
666 IRT_ENTRY(void, InterpreterRuntime::throw_illegal_monitor_state_exception(JavaThread* thread))
667 THROW(vmSymbols::java_lang_IllegalMonitorStateException());
668 IRT_END
669
670
671 IRT_ENTRY(void, InterpreterRuntime::new_illegal_monitor_state_exception(JavaThread* thread))
672 // Returns an illegal exception to install into the current thread. The
673 // pending_exception flag is cleared so normal exception handling does not
674 // trigger. Any current installed exception will be overwritten. This
675 // method will be called during an exception unwind.
676
677 assert(!HAS_PENDING_EXCEPTION, "no pending exception");
678 Handle exception(thread, thread->vm_result());
679 assert(exception() != NULL, "vm result should be set");
680 thread->set_vm_result(NULL); // clear vm result before continuing (may cause memory leaks and assert failures)
681 if (!exception->is_a(SystemDictionary::ThreadDeath_klass())) {
682 exception = get_preinitialized_exception(
683 SystemDictionary::IllegalMonitorStateException_klass(),
684 CATCH);
685 }
686 thread->set_vm_result(exception());
687 IRT_END
688
689
690 //------------------------------------------------------------------------------------------------------------------------
691 // Invokes
692
693 IRT_ENTRY(Bytecodes::Code, InterpreterRuntime::get_original_bytecode_at(JavaThread* thread, Method* method, address bcp))
694 return method->orig_bytecode_at(method->bci_from(bcp));
695 IRT_END
696
697 IRT_ENTRY(void, InterpreterRuntime::set_original_bytecode_at(JavaThread* thread, Method* method, address bcp, Bytecodes::Code new_code))
698 method->set_orig_bytecode_at(method->bci_from(bcp), new_code);
699 IRT_END
700
701 IRT_ENTRY(void, InterpreterRuntime::_breakpoint(JavaThread* thread, Method* method, address bcp))
702 JvmtiExport::post_raw_breakpoint(thread, method, bcp);
703 IRT_END
704
705 void InterpreterRuntime::resolve_invoke(JavaThread* thread, Bytecodes::Code bytecode) {
706 Thread* THREAD = thread;
707 // extract receiver from the outgoing argument list if necessary
708 Handle receiver(thread, NULL);
709 if (bytecode == Bytecodes::_invokevirtual || bytecode == Bytecodes::_invokeinterface) {
710 ResourceMark rm(thread);
711 methodHandle m (thread, method(thread));
712 Bytecode_invoke call(m, bci(thread));
713 Symbol* signature = call.signature();
714 receiver = Handle(thread,
715 thread->last_frame().interpreter_callee_receiver(signature));
716 assert(Universe::heap()->is_in_reserved_or_null(receiver()),
717 "sanity check");
718 assert(receiver.is_null() ||
719 !Universe::heap()->is_in_reserved(receiver->klass()),
720 "sanity check");
721 }
722
723 // resolve method
724 CallInfo info;
725 constantPoolHandle pool(thread, method(thread)->constants());
726
727 {
728 JvmtiHideSingleStepping jhss(thread);
729 LinkResolver::resolve_invoke(info, receiver, pool,
730 get_index_u2_cpcache(thread, bytecode), bytecode,
731 CHECK);
732 if (JvmtiExport::can_hotswap_or_post_breakpoint()) {
733 int retry_count = 0;
734 while (info.resolved_method()->is_old()) {
735 // It is very unlikely that method is redefined more than 100 times
736 // in the middle of resolve. If it is looping here more than 100 times
737 // means then there could be a bug here.
738 guarantee((retry_count++ < 100),
739 "Could not resolve to latest version of redefined method");
740 // method is redefined in the middle of resolve so re-try.
741 LinkResolver::resolve_invoke(info, receiver, pool,
742 get_index_u2_cpcache(thread, bytecode), bytecode,
743 CHECK);
744 }
745 }
746 } // end JvmtiHideSingleStepping
747
748 // check if link resolution caused cpCache to be updated
749 ConstantPoolCacheEntry* cp_cache_entry = cache_entry(thread);
750 if (cp_cache_entry->is_resolved(bytecode)) return;
751
752 if (bytecode == Bytecodes::_invokeinterface) {
753 ResourceMark rm(thread);
754 log_develop_trace(itables)("Resolving: klass: %s to method: %s",
755 info.resolved_klass()->name()->as_C_string(),
756 info.resolved_method()->name()->as_C_string());
757 }
758 #ifdef ASSERT
759 if (bytecode == Bytecodes::_invokeinterface) {
760 if (info.resolved_method()->method_holder() ==
761 SystemDictionary::Object_klass()) {
762 // NOTE: THIS IS A FIX FOR A CORNER CASE in the JVM spec
763 // (see also CallInfo::set_interface for details)
764 assert(info.call_kind() == CallInfo::vtable_call ||
765 info.call_kind() == CallInfo::direct_call, "");
766 methodHandle rm = info.resolved_method();
767 assert(rm->is_final() || info.has_vtable_index(),
768 "should have been set already");
769 } else if (!info.resolved_method()->has_itable_index()) {
770 // Resolved something like CharSequence.toString. Use vtable not itable.
771 assert(info.call_kind() != CallInfo::itable_call, "");
772 } else {
773 // Setup itable entry
774 assert(info.call_kind() == CallInfo::itable_call, "");
775 int index = info.resolved_method()->itable_index();
776 assert(info.itable_index() == index, "");
777 }
778 } else {
779 assert(info.call_kind() == CallInfo::direct_call ||
780 info.call_kind() == CallInfo::vtable_call, "");
781 }
782 #endif
783 switch (info.call_kind()) {
784 case CallInfo::direct_call:
785 cp_cache_entry->set_direct_call(
786 bytecode,
787 info.resolved_method());
788 break;
789 case CallInfo::vtable_call:
790 cp_cache_entry->set_vtable_call(
791 bytecode,
792 info.resolved_method(),
793 info.vtable_index());
794 break;
795 case CallInfo::itable_call:
796 cp_cache_entry->set_itable_call(
797 bytecode,
798 info.resolved_method(),
799 info.itable_index());
800 break;
801 default: ShouldNotReachHere();
802 }
803 }
804
805
806 // First time execution: Resolve symbols, create a permanent MethodType object.
807 void InterpreterRuntime::resolve_invokehandle(JavaThread* thread) {
808 Thread* THREAD = thread;
809 const Bytecodes::Code bytecode = Bytecodes::_invokehandle;
810
811 // resolve method
812 CallInfo info;
813 constantPoolHandle pool(thread, method(thread)->constants());
814 {
815 JvmtiHideSingleStepping jhss(thread);
816 LinkResolver::resolve_invoke(info, Handle(), pool,
817 get_index_u2_cpcache(thread, bytecode), bytecode,
818 CHECK);
819 } // end JvmtiHideSingleStepping
820
821 ConstantPoolCacheEntry* cp_cache_entry = cache_entry(thread);
822 cp_cache_entry->set_method_handle(pool, info);
823 }
824
825 // First time execution: Resolve symbols, create a permanent CallSite object.
826 void InterpreterRuntime::resolve_invokedynamic(JavaThread* thread) {
827 Thread* THREAD = thread;
828 const Bytecodes::Code bytecode = Bytecodes::_invokedynamic;
829
830 //TO DO: consider passing BCI to Java.
831 // int caller_bci = method(thread)->bci_from(bcp(thread));
832
833 // resolve method
834 CallInfo info;
835 constantPoolHandle pool(thread, method(thread)->constants());
836 int index = get_index_u4(thread, bytecode);
837 {
838 JvmtiHideSingleStepping jhss(thread);
839 LinkResolver::resolve_invoke(info, Handle(), pool,
840 index, bytecode, CHECK);
841 } // end JvmtiHideSingleStepping
842
843 ConstantPoolCacheEntry* cp_cache_entry = pool->invokedynamic_cp_cache_entry_at(index);
844 cp_cache_entry->set_dynamic_call(pool, info);
845 }
846
847 // This function is the interface to the assembly code. It returns the resolved
848 // cpCache entry. This doesn't safepoint, but the helper routines safepoint.
849 // This function will check for redefinition!
850 IRT_ENTRY(void, InterpreterRuntime::resolve_from_cache(JavaThread* thread, Bytecodes::Code bytecode)) {
851 switch (bytecode) {
852 case Bytecodes::_getstatic:
853 case Bytecodes::_putstatic:
854 case Bytecodes::_getfield:
855 case Bytecodes::_putfield:
856 resolve_get_put(thread, bytecode);
857 break;
858 case Bytecodes::_invokevirtual:
859 case Bytecodes::_invokespecial:
860 case Bytecodes::_invokestatic:
861 case Bytecodes::_invokeinterface:
862 resolve_invoke(thread, bytecode);
863 break;
864 case Bytecodes::_invokehandle:
865 resolve_invokehandle(thread);
866 break;
867 case Bytecodes::_invokedynamic:
868 resolve_invokedynamic(thread);
869 break;
870 default:
871 fatal("unexpected bytecode: %s", Bytecodes::name(bytecode));
872 break;
873 }
874 }
875 IRT_END
876
877 //------------------------------------------------------------------------------------------------------------------------
878 // Miscellaneous
879
880
881 nmethod* InterpreterRuntime::frequency_counter_overflow(JavaThread* thread, address branch_bcp) {
882 nmethod* nm = frequency_counter_overflow_inner(thread, branch_bcp);
883 assert(branch_bcp != NULL || nm == NULL, "always returns null for non OSR requests");
884 if (branch_bcp != NULL && nm != NULL) {
885 // This was a successful request for an OSR nmethod. Because
886 // frequency_counter_overflow_inner ends with a safepoint check,
887 // nm could have been unloaded so look it up again. It's unsafe
888 // to examine nm directly since it might have been freed and used
889 // for something else.
890 frame fr = thread->last_frame();
891 Method* method = fr.interpreter_frame_method();
892 int bci = method->bci_from(fr.interpreter_frame_bcp());
893 nm = method->lookup_osr_nmethod_for(bci, CompLevel_none, false);
894 }
895 #ifndef PRODUCT
896 if (TraceOnStackReplacement) {
897 if (nm != NULL) {
898 tty->print("OSR entry @ pc: " INTPTR_FORMAT ": ", p2i(nm->osr_entry()));
899 nm->print();
900 }
901 }
902 #endif
903 return nm;
904 }
905
906 IRT_ENTRY(nmethod*,
907 InterpreterRuntime::frequency_counter_overflow_inner(JavaThread* thread, address branch_bcp))
908 // use UnlockFlagSaver to clear and restore the _do_not_unlock_if_synchronized
909 // flag, in case this method triggers classloading which will call into Java.
910 UnlockFlagSaver fs(thread);
911
912 frame fr = thread->last_frame();
913 assert(fr.is_interpreted_frame(), "must come from interpreter");
914 methodHandle method(thread, fr.interpreter_frame_method());
915 const int branch_bci = branch_bcp != NULL ? method->bci_from(branch_bcp) : InvocationEntryBci;
916 const int bci = branch_bcp != NULL ? method->bci_from(fr.interpreter_frame_bcp()) : InvocationEntryBci;
917
918 assert(!HAS_PENDING_EXCEPTION, "Should not have any exceptions pending");
919 nmethod* osr_nm = CompilationPolicy::policy()->event(method, method, branch_bci, bci, CompLevel_none, NULL, thread);
920 assert(!HAS_PENDING_EXCEPTION, "Event handler should not throw any exceptions");
921
922 if (osr_nm != NULL) {
923 // We may need to do on-stack replacement which requires that no
924 // monitors in the activation are biased because their
925 // BasicObjectLocks will need to migrate during OSR. Force
926 // unbiasing of all monitors in the activation now (even though
927 // the OSR nmethod might be invalidated) because we don't have a
928 // safepoint opportunity later once the migration begins.
929 if (UseBiasedLocking) {
930 ResourceMark rm;
931 GrowableArray<Handle>* objects_to_revoke = new GrowableArray<Handle>();
932 for( BasicObjectLock *kptr = fr.interpreter_frame_monitor_end();
933 kptr < fr.interpreter_frame_monitor_begin();
934 kptr = fr.next_monitor_in_interpreter_frame(kptr) ) {
935 if( kptr->obj() != NULL ) {
936 objects_to_revoke->append(Handle(THREAD, kptr->obj()));
937 }
938 }
939 BiasedLocking::revoke(objects_to_revoke);
940 }
941 }
942 return osr_nm;
943 IRT_END
944
945 IRT_LEAF(jint, InterpreterRuntime::bcp_to_di(Method* method, address cur_bcp))
946 assert(ProfileInterpreter, "must be profiling interpreter");
947 int bci = method->bci_from(cur_bcp);
948 MethodData* mdo = method->method_data();
949 if (mdo == NULL) return 0;
950 return mdo->bci_to_di(bci);
951 IRT_END
952
953 IRT_ENTRY(void, InterpreterRuntime::profile_method(JavaThread* thread))
954 // use UnlockFlagSaver to clear and restore the _do_not_unlock_if_synchronized
955 // flag, in case this method triggers classloading which will call into Java.
956 UnlockFlagSaver fs(thread);
957
958 assert(ProfileInterpreter, "must be profiling interpreter");
959 frame fr = thread->last_frame();
960 assert(fr.is_interpreted_frame(), "must come from interpreter");
961 methodHandle method(thread, fr.interpreter_frame_method());
962 Method::build_interpreter_method_data(method, THREAD);
963 if (HAS_PENDING_EXCEPTION) {
964 assert((PENDING_EXCEPTION->is_a(SystemDictionary::OutOfMemoryError_klass())), "we expect only an OOM error here");
965 CLEAR_PENDING_EXCEPTION;
966 // and fall through...
967 }
968 IRT_END
969
970
971 #ifdef ASSERT
972 IRT_LEAF(void, InterpreterRuntime::verify_mdp(Method* method, address bcp, address mdp))
973 assert(ProfileInterpreter, "must be profiling interpreter");
974
975 MethodData* mdo = method->method_data();
976 assert(mdo != NULL, "must not be null");
977
978 int bci = method->bci_from(bcp);
979
980 address mdp2 = mdo->bci_to_dp(bci);
981 if (mdp != mdp2) {
982 ResourceMark rm;
983 ResetNoHandleMark rnm; // In a LEAF entry.
984 HandleMark hm;
985 tty->print_cr("FAILED verify : actual mdp %p expected mdp %p @ bci %d", mdp, mdp2, bci);
986 int current_di = mdo->dp_to_di(mdp);
987 int expected_di = mdo->dp_to_di(mdp2);
988 tty->print_cr(" actual di %d expected di %d", current_di, expected_di);
989 int expected_approx_bci = mdo->data_at(expected_di)->bci();
990 int approx_bci = -1;
991 if (current_di >= 0) {
992 approx_bci = mdo->data_at(current_di)->bci();
993 }
994 tty->print_cr(" actual bci is %d expected bci %d", approx_bci, expected_approx_bci);
995 mdo->print_on(tty);
996 method->print_codes();
997 }
998 assert(mdp == mdp2, "wrong mdp");
999 IRT_END
1000 #endif // ASSERT
1001
1002 IRT_ENTRY(void, InterpreterRuntime::update_mdp_for_ret(JavaThread* thread, int return_bci))
1003 assert(ProfileInterpreter, "must be profiling interpreter");
1004 ResourceMark rm(thread);
1005 HandleMark hm(thread);
1006 frame fr = thread->last_frame();
1007 assert(fr.is_interpreted_frame(), "must come from interpreter");
1008 MethodData* h_mdo = fr.interpreter_frame_method()->method_data();
1009
1010 // Grab a lock to ensure atomic access to setting the return bci and
1011 // the displacement. This can block and GC, invalidating all naked oops.
1012 MutexLocker ml(RetData_lock);
1013
1014 // ProfileData is essentially a wrapper around a derived oop, so we
1015 // need to take the lock before making any ProfileData structures.
1016 ProfileData* data = h_mdo->data_at(h_mdo->dp_to_di(fr.interpreter_frame_mdp()));
1017 RetData* rdata = data->as_RetData();
1018 address new_mdp = rdata->fixup_ret(return_bci, h_mdo);
1019 fr.interpreter_frame_set_mdp(new_mdp);
1020 IRT_END
1021
1022 IRT_ENTRY(MethodCounters*, InterpreterRuntime::build_method_counters(JavaThread* thread, Method* m))
1023 MethodCounters* mcs = Method::build_method_counters(m, thread);
1024 if (HAS_PENDING_EXCEPTION) {
1025 assert((PENDING_EXCEPTION->is_a(SystemDictionary::OutOfMemoryError_klass())), "we expect only an OOM error here");
1026 CLEAR_PENDING_EXCEPTION;
1027 }
1028 return mcs;
1029 IRT_END
1030
1031
1032 IRT_ENTRY(void, InterpreterRuntime::at_safepoint(JavaThread* thread))
1033 // We used to need an explict preserve_arguments here for invoke bytecodes. However,
1034 // stack traversal automatically takes care of preserving arguments for invoke, so
1035 // this is no longer needed.
1036
1037 // IRT_END does an implicit safepoint check, hence we are guaranteed to block
1038 // if this is called during a safepoint
1039
1040 if (JvmtiExport::should_post_single_step()) {
1041 // We are called during regular safepoints and when the VM is
1042 // single stepping. If any thread is marked for single stepping,
1043 // then we may have JVMTI work to do.
1044 JvmtiExport::at_single_stepping_point(thread, method(thread), bcp(thread));
1045 }
1046 IRT_END
1047
1048 IRT_ENTRY(void, InterpreterRuntime::post_field_access(JavaThread *thread, oopDesc* obj,
1049 ConstantPoolCacheEntry *cp_entry))
1050
1051 // check the access_flags for the field in the klass
1052
1053 InstanceKlass* ik = InstanceKlass::cast(cp_entry->f1_as_klass());
1054 int index = cp_entry->field_index();
1055 if ((ik->field_access_flags(index) & JVM_ACC_FIELD_ACCESS_WATCHED) == 0) return;
1056
1057 bool is_static = (obj == NULL);
1058 HandleMark hm(thread);
1059
1060 Handle h_obj;
1061 if (!is_static) {
1062 // non-static field accessors have an object, but we need a handle
1063 h_obj = Handle(thread, obj);
1064 }
1065 instanceKlassHandle h_cp_entry_f1(thread, (Klass*)cp_entry->f1_as_klass());
1066 jfieldID fid = jfieldIDWorkaround::to_jfieldID(h_cp_entry_f1, cp_entry->f2_as_index(), is_static);
1067 JvmtiExport::post_field_access(thread, method(thread), bcp(thread), h_cp_entry_f1, h_obj, fid);
1068 IRT_END
1069
1070 IRT_ENTRY(void, InterpreterRuntime::post_field_modification(JavaThread *thread,
1071 oopDesc* obj, ConstantPoolCacheEntry *cp_entry, jvalue *value))
1072
1073 Klass* k = (Klass*)cp_entry->f1_as_klass();
1074
1075 // check the access_flags for the field in the klass
1076 InstanceKlass* ik = InstanceKlass::cast(k);
1077 int index = cp_entry->field_index();
1078 // bail out if field modifications are not watched
1079 if ((ik->field_access_flags(index) & JVM_ACC_FIELD_MODIFICATION_WATCHED) == 0) return;
1080
1081 char sig_type = '\0';
1082
1083 switch(cp_entry->flag_state()) {
1084 case btos: sig_type = 'Z'; break;
1085 case ctos: sig_type = 'C'; break;
1086 case stos: sig_type = 'S'; break;
1087 case itos: sig_type = 'I'; break;
1088 case ftos: sig_type = 'F'; break;
1089 case atos: sig_type = 'L'; break;
1090 case ltos: sig_type = 'J'; break;
1091 case dtos: sig_type = 'D'; break;
1092 default: ShouldNotReachHere(); return;
1093 }
1094 bool is_static = (obj == NULL);
1095
1096 HandleMark hm(thread);
1097 instanceKlassHandle h_klass(thread, k);
1098 jfieldID fid = jfieldIDWorkaround::to_jfieldID(h_klass, cp_entry->f2_as_index(), is_static);
1099 jvalue fvalue;
1100 #ifdef _LP64
1101 fvalue = *value;
1102 #else
1103 // Long/double values are stored unaligned and also noncontiguously with
1104 // tagged stacks. We can't just do a simple assignment even in the non-
1105 // J/D cases because a C++ compiler is allowed to assume that a jvalue is
1106 // 8-byte aligned, and interpreter stack slots are only 4-byte aligned.
1107 // We assume that the two halves of longs/doubles are stored in interpreter
1108 // stack slots in platform-endian order.
1109 jlong_accessor u;
1110 jint* newval = (jint*)value;
1111 u.words[0] = newval[0];
1112 u.words[1] = newval[Interpreter::stackElementWords]; // skip if tag
1113 fvalue.j = u.long_value;
1114 #endif // _LP64
1115
1116 Handle h_obj;
1117 if (!is_static) {
1118 // non-static field accessors have an object, but we need a handle
1119 h_obj = Handle(thread, obj);
1120 }
1121
1122 JvmtiExport::post_raw_field_modification(thread, method(thread), bcp(thread), h_klass, h_obj,
1123 fid, sig_type, &fvalue);
1124 IRT_END
1125
1126 IRT_ENTRY(void, InterpreterRuntime::post_method_entry(JavaThread *thread))
1127 JvmtiExport::post_method_entry(thread, InterpreterRuntime::method(thread), InterpreterRuntime::last_frame(thread));
1128 IRT_END
1129
1130
1131 IRT_ENTRY(void, InterpreterRuntime::post_method_exit(JavaThread *thread))
1132 JvmtiExport::post_method_exit(thread, InterpreterRuntime::method(thread), InterpreterRuntime::last_frame(thread));
1133 IRT_END
1134
1135 IRT_LEAF(int, InterpreterRuntime::interpreter_contains(address pc))
1136 {
1137 return (Interpreter::contains(pc) ? 1 : 0);
1138 }
1139 IRT_END
1140
1141
1142 // Implementation of SignatureHandlerLibrary
1143
1144 #ifndef SHARING_FAST_NATIVE_FINGERPRINTS
1145 // Dummy definition (else normalization method is defined in CPU
1146 // dependant code)
1147 uint64_t InterpreterRuntime::normalize_fast_native_fingerprint(uint64_t fingerprint) {
1148 return fingerprint;
1149 }
1150 #endif
1151
1152 address SignatureHandlerLibrary::set_handler_blob() {
1153 BufferBlob* handler_blob = BufferBlob::create("native signature handlers", blob_size);
1154 if (handler_blob == NULL) {
1155 return NULL;
1156 }
1157 address handler = handler_blob->code_begin();
1158 _handler_blob = handler_blob;
1159 _handler = handler;
1160 return handler;
1161 }
1162
1163 void SignatureHandlerLibrary::initialize() {
1164 if (_fingerprints != NULL) {
1165 return;
1166 }
1167 if (set_handler_blob() == NULL) {
1168 vm_exit_out_of_memory(blob_size, OOM_MALLOC_ERROR, "native signature handlers");
1169 }
1170
1171 BufferBlob* bb = BufferBlob::create("Signature Handler Temp Buffer",
1172 SignatureHandlerLibrary::buffer_size);
1173 _buffer = bb->code_begin();
1174
1175 _fingerprints = new(ResourceObj::C_HEAP, mtCode)GrowableArray<uint64_t>(32, true);
1176 _handlers = new(ResourceObj::C_HEAP, mtCode)GrowableArray<address>(32, true);
1177 }
1178
1179 address SignatureHandlerLibrary::set_handler(CodeBuffer* buffer) {
1180 address handler = _handler;
1181 int insts_size = buffer->pure_insts_size();
1182 if (handler + insts_size > _handler_blob->code_end()) {
1183 // get a new handler blob
1184 handler = set_handler_blob();
1185 }
1186 if (handler != NULL) {
1187 memcpy(handler, buffer->insts_begin(), insts_size);
1188 pd_set_handler(handler);
1189 ICache::invalidate_range(handler, insts_size);
1190 _handler = handler + insts_size;
1191 }
1192 CodeCacheExtensions::handle_generated_handler(handler, buffer->name(), _handler);
1193 return handler;
1194 }
1195
1196 void SignatureHandlerLibrary::add(const methodHandle& method) {
1197 if (method->signature_handler() == NULL) {
1198 // use slow signature handler if we can't do better
1199 int handler_index = -1;
1200 // check if we can use customized (fast) signature handler
1201 if (UseFastSignatureHandlers && CodeCacheExtensions::support_fast_signature_handlers() && method->size_of_parameters() <= Fingerprinter::max_size_of_parameters) {
1202 // use customized signature handler
1203 MutexLocker mu(SignatureHandlerLibrary_lock);
1204 // make sure data structure is initialized
1205 initialize();
1206 // lookup method signature's fingerprint
1207 uint64_t fingerprint = Fingerprinter(method).fingerprint();
1208 // allow CPU dependant code to optimize the fingerprints for the fast handler
1209 fingerprint = InterpreterRuntime::normalize_fast_native_fingerprint(fingerprint);
1210 handler_index = _fingerprints->find(fingerprint);
1211 // create handler if necessary
1212 if (handler_index < 0) {
1213 ResourceMark rm;
1214 ptrdiff_t align_offset = (address)
1215 round_to((intptr_t)_buffer, CodeEntryAlignment) - (address)_buffer;
1216 CodeBuffer buffer((address)(_buffer + align_offset),
1217 SignatureHandlerLibrary::buffer_size - align_offset);
1218 if (!CodeCacheExtensions::support_dynamic_code()) {
1219 // we need a name for the signature (for lookups or saving)
1220 const int SYMBOL_SIZE = 50;
1221 char *symbolName = NEW_RESOURCE_ARRAY(char, SYMBOL_SIZE);
1222 // support for named signatures
1223 jio_snprintf(symbolName, SYMBOL_SIZE,
1224 "native_" UINT64_FORMAT, fingerprint);
1225 buffer.set_name(symbolName);
1226 }
1227 InterpreterRuntime::SignatureHandlerGenerator(method, &buffer).generate(fingerprint);
1228 // copy into code heap
1229 address handler = set_handler(&buffer);
1230 if (handler == NULL) {
1231 // use slow signature handler (without memorizing it in the fingerprints)
1232 } else {
1233 // debugging suppport
1234 if (PrintSignatureHandlers && (handler != Interpreter::slow_signature_handler())) {
1235 tty->cr();
1236 tty->print_cr("argument handler #%d for: %s %s (fingerprint = " UINT64_FORMAT ", %d bytes generated)",
1237 _handlers->length(),
1238 (method->is_static() ? "static" : "receiver"),
1239 method->name_and_sig_as_C_string(),
1240 fingerprint,
1241 buffer.insts_size());
1242 if (buffer.insts_size() > 0) {
1243 // buffer may be empty for pregenerated handlers
1244 Disassembler::decode(handler, handler + buffer.insts_size());
1245 }
1246 #ifndef PRODUCT
1247 address rh_begin = Interpreter::result_handler(method()->result_type());
1248 if (CodeCache::contains(rh_begin)) {
1249 // else it might be special platform dependent values
1250 tty->print_cr(" --- associated result handler ---");
1251 address rh_end = rh_begin;
1252 while (*(int*)rh_end != 0) {
1253 rh_end += sizeof(int);
1254 }
1255 Disassembler::decode(rh_begin, rh_end);
1256 } else {
1257 tty->print_cr(" associated result handler: " PTR_FORMAT, p2i(rh_begin));
1258 }
1259 #endif
1260 }
1261 // add handler to library
1262 _fingerprints->append(fingerprint);
1263 _handlers->append(handler);
1264 // set handler index
1265 assert(_fingerprints->length() == _handlers->length(), "sanity check");
1266 handler_index = _fingerprints->length() - 1;
1267 }
1268 }
1269 // Set handler under SignatureHandlerLibrary_lock
1270 if (handler_index < 0) {
1271 // use generic signature handler
1272 method->set_signature_handler(Interpreter::slow_signature_handler());
1273 } else {
1274 // set handler
1275 method->set_signature_handler(_handlers->at(handler_index));
1276 }
1277 } else {
1278 CHECK_UNHANDLED_OOPS_ONLY(Thread::current()->clear_unhandled_oops());
1279 // use generic signature handler
1280 method->set_signature_handler(Interpreter::slow_signature_handler());
1281 }
1282 }
1283 #ifdef ASSERT
1284 int handler_index = -1;
1285 int fingerprint_index = -2;
1286 {
1287 // '_handlers' and '_fingerprints' are 'GrowableArray's and are NOT synchronized
1288 // in any way if accessed from multiple threads. To avoid races with another
1289 // thread which may change the arrays in the above, mutex protected block, we
1290 // have to protect this read access here with the same mutex as well!
1291 MutexLocker mu(SignatureHandlerLibrary_lock);
1292 if (_handlers != NULL) {
1293 handler_index = _handlers->find(method->signature_handler());
1294 uint64_t fingerprint = Fingerprinter(method).fingerprint();
1295 fingerprint = InterpreterRuntime::normalize_fast_native_fingerprint(fingerprint);
1296 fingerprint_index = _fingerprints->find(fingerprint);
1297 }
1298 }
1299 assert(method->signature_handler() == Interpreter::slow_signature_handler() ||
1300 handler_index == fingerprint_index, "sanity check");
1301 #endif // ASSERT
1302 }
1303
1304 void SignatureHandlerLibrary::add(uint64_t fingerprint, address handler) {
1305 int handler_index = -1;
1306 // use customized signature handler
1307 MutexLocker mu(SignatureHandlerLibrary_lock);
1308 // make sure data structure is initialized
1309 initialize();
1310 fingerprint = InterpreterRuntime::normalize_fast_native_fingerprint(fingerprint);
1311 handler_index = _fingerprints->find(fingerprint);
1312 // create handler if necessary
1313 if (handler_index < 0) {
1314 if (PrintSignatureHandlers && (handler != Interpreter::slow_signature_handler())) {
1315 tty->cr();
1316 tty->print_cr("argument handler #%d at " PTR_FORMAT " for fingerprint " UINT64_FORMAT,
1317 _handlers->length(),
1318 p2i(handler),
1319 fingerprint);
1320 }
1321 _fingerprints->append(fingerprint);
1322 _handlers->append(handler);
1323 } else {
1324 if (PrintSignatureHandlers) {
1325 tty->cr();
1326 tty->print_cr("duplicate argument handler #%d for fingerprint " UINT64_FORMAT "(old: " PTR_FORMAT ", new : " PTR_FORMAT ")",
1327 _handlers->length(),
1328 fingerprint,
1329 p2i(_handlers->at(handler_index)),
1330 p2i(handler));
1331 }
1332 }
1333 }
1334
1335
1336 BufferBlob* SignatureHandlerLibrary::_handler_blob = NULL;
1337 address SignatureHandlerLibrary::_handler = NULL;
1338 GrowableArray<uint64_t>* SignatureHandlerLibrary::_fingerprints = NULL;
1339 GrowableArray<address>* SignatureHandlerLibrary::_handlers = NULL;
1340 address SignatureHandlerLibrary::_buffer = NULL;
1341
1342
1343 IRT_ENTRY(void, InterpreterRuntime::prepare_native_call(JavaThread* thread, Method* method))
1344 methodHandle m(thread, method);
1345 assert(m->is_native(), "sanity check");
1346 // lookup native function entry point if it doesn't exist
1347 bool in_base_library;
1348 if (!m->has_native_function()) {
1349 NativeLookup::lookup(m, in_base_library, CHECK);
1350 }
1351 // make sure signature handler is installed
1352 SignatureHandlerLibrary::add(m);
1353 // The interpreter entry point checks the signature handler first,
1354 // before trying to fetch the native entry point and klass mirror.
1355 // We must set the signature handler last, so that multiple processors
1356 // preparing the same method will be sure to see non-null entry & mirror.
1357 IRT_END
1358
1359 #if defined(IA32) || defined(AMD64) || defined(ARM)
1360 IRT_LEAF(void, InterpreterRuntime::popframe_move_outgoing_args(JavaThread* thread, void* src_address, void* dest_address))
1361 if (src_address == dest_address) {
1362 return;
1363 }
1364 ResetNoHandleMark rnm; // In a LEAF entry.
1365 HandleMark hm;
1366 ResourceMark rm;
1367 frame fr = thread->last_frame();
1368 assert(fr.is_interpreted_frame(), "");
1369 jint bci = fr.interpreter_frame_bci();
1370 methodHandle mh(thread, fr.interpreter_frame_method());
1371 Bytecode_invoke invoke(mh, bci);
1372 ArgumentSizeComputer asc(invoke.signature());
1373 int size_of_arguments = (asc.size() + (invoke.has_receiver() ? 1 : 0)); // receiver
1374 Copy::conjoint_jbytes(src_address, dest_address,
1375 size_of_arguments * Interpreter::stackElementSize);
1376 IRT_END
1377 #endif
1378
1379 #if INCLUDE_JVMTI
1380 // This is a support of the JVMTI PopFrame interface.
1381 // Make sure it is an invokestatic of a polymorphic intrinsic that has a member_name argument
1382 // and return it as a vm_result so that it can be reloaded in the list of invokestatic parameters.
1383 // The member_name argument is a saved reference (in local#0) to the member_name.
1384 // For backward compatibility with some JDK versions (7, 8) it can also be a direct method handle.
1385 // FIXME: remove DMH case after j.l.i.InvokerBytecodeGenerator code shape is updated.
1386 IRT_ENTRY(void, InterpreterRuntime::member_name_arg_or_null(JavaThread* thread, address member_name,
1387 Method* method, address bcp))
1388 Bytecodes::Code code = Bytecodes::code_at(method, bcp);
1389 if (code != Bytecodes::_invokestatic) {
1390 return;
1391 }
1392 ConstantPool* cpool = method->constants();
1393 int cp_index = Bytes::get_native_u2(bcp + 1) + ConstantPool::CPCACHE_INDEX_TAG;
1394 Symbol* cname = cpool->klass_name_at(cpool->klass_ref_index_at(cp_index));
1395 Symbol* mname = cpool->name_ref_at(cp_index);
1396
1397 if (MethodHandles::has_member_arg(cname, mname)) {
1398 oop member_name_oop = (oop) member_name;
1399 if (java_lang_invoke_DirectMethodHandle::is_instance(member_name_oop)) {
1400 // FIXME: remove after j.l.i.InvokerBytecodeGenerator code shape is updated.
1401 member_name_oop = java_lang_invoke_DirectMethodHandle::member(member_name_oop);
1402 }
1403 thread->set_vm_result(member_name_oop);
1404 } else {
1405 thread->set_vm_result(NULL);
1406 }
1407 IRT_END
1408 #endif // INCLUDE_JVMTI