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