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