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 "compiler/compileBroker.hpp"
30 #include "compiler/disassembler.hpp"
31 #include "gc/shared/collectedHeap.hpp"
32 #include "interpreter/interpreter.hpp"
33 #include "interpreter/interpreterRuntime.hpp"
34 #include "interpreter/linkResolver.hpp"
35 #include "interpreter/templateTable.hpp"
36 #include "memory/oopFactory.hpp"
37 #include "memory/universe.inline.hpp"
38 #include "oops/constantPool.hpp"
39 #include "oops/instanceKlass.hpp"
40 #include "oops/methodData.hpp"
41 #include "oops/objArrayKlass.hpp"
42 #include "oops/objArrayOop.inline.hpp"
43 #include "oops/oop.inline.hpp"
44 #include "oops/symbol.hpp"
45 #include "prims/jvmtiExport.hpp"
46 #include "prims/nativeLookup.hpp"
47 #include "runtime/atomic.inline.hpp"
48 #include "runtime/biasedLocking.hpp"
49 #include "runtime/compilationPolicy.hpp"
50 #include "runtime/deoptimization.hpp"
51 #include "runtime/fieldDescriptor.hpp"
52 #include "runtime/handles.inline.hpp"
53 #include "runtime/icache.hpp"
54 #include "runtime/interfaceSupport.hpp"
55 #include "runtime/java.hpp"
56 #include "runtime/jfieldIDWorkaround.hpp"
57 #include "runtime/osThread.hpp"
58 #include "runtime/sharedRuntime.hpp"
59 #include "runtime/stubRoutines.hpp"
60 #include "runtime/synchronizer.hpp"
61 #include "runtime/threadCritical.hpp"
62 #include "utilities/events.hpp"
63 #ifdef COMPILER2
64 #include "opto/runtime.hpp"
65 #endif
66
67 PRAGMA_FORMAT_MUTE_WARNINGS_FOR_GCC
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
318 IRT_ENTRY(void, InterpreterRuntime::create_exception(JavaThread* thread, char* name, char* message))
319 // lookup exception klass
320 TempNewSymbol s = SymbolTable::new_symbol(name, CHECK);
321 if (ProfileTraps) {
322 if (s == vmSymbols::java_lang_ArithmeticException()) {
323 note_trap(thread, Deoptimization::Reason_div0_check, CHECK);
324 } else if (s == vmSymbols::java_lang_NullPointerException()) {
325 note_trap(thread, Deoptimization::Reason_null_check, CHECK);
326 }
327 }
328 // create exception
329 Handle exception = Exceptions::new_exception(thread, s, message);
330 thread->set_vm_result(exception());
331 IRT_END
332
333
334 IRT_ENTRY(void, InterpreterRuntime::create_klass_exception(JavaThread* thread, char* name, oopDesc* obj))
335 ResourceMark rm(thread);
336 const char* klass_name = obj->klass()->external_name();
337 // lookup exception klass
338 TempNewSymbol s = SymbolTable::new_symbol(name, CHECK);
339 if (ProfileTraps) {
340 note_trap(thread, Deoptimization::Reason_class_check, CHECK);
341 }
342 // create exception, with klass name as detail message
343 Handle exception = Exceptions::new_exception(thread, s, klass_name);
344 thread->set_vm_result(exception());
345 IRT_END
346
347
348 IRT_ENTRY(void, InterpreterRuntime::throw_ArrayIndexOutOfBoundsException(JavaThread* thread, char* name, jint index))
349 char message[jintAsStringSize];
350 // lookup exception klass
351 TempNewSymbol s = SymbolTable::new_symbol(name, CHECK);
352 if (ProfileTraps) {
353 note_trap(thread, Deoptimization::Reason_range_check, CHECK);
354 }
355 // create exception
356 sprintf(message, "%d", index);
357 THROW_MSG(s, message);
358 IRT_END
359
360 IRT_ENTRY(void, InterpreterRuntime::throw_ClassCastException(
361 JavaThread* thread, oopDesc* obj))
362
363 ResourceMark rm(thread);
364 char* message = SharedRuntime::generate_class_cast_message(
365 thread, obj->klass()->external_name());
366
367 if (ProfileTraps) {
368 note_trap(thread, Deoptimization::Reason_class_check, CHECK);
369 }
370
371 // create exception
372 THROW_MSG(vmSymbols::java_lang_ClassCastException(), message);
373 IRT_END
374
375 // exception_handler_for_exception(...) returns the continuation address,
376 // the exception oop (via TLS) and sets the bci/bcp for the continuation.
377 // The exception oop is returned to make sure it is preserved over GC (it
378 // is only on the stack if the exception was thrown explicitly via athrow).
379 // During this operation, the expression stack contains the values for the
380 // bci where the exception happened. If the exception was propagated back
381 // from a call, the expression stack contains the values for the bci at the
382 // invoke w/o arguments (i.e., as if one were inside the call).
383 IRT_ENTRY(address, InterpreterRuntime::exception_handler_for_exception(JavaThread* thread, oopDesc* exception))
384
385 Handle h_exception(thread, exception);
386 methodHandle h_method (thread, method(thread));
387 constantPoolHandle h_constants(thread, h_method->constants());
388 bool should_repeat;
389 int handler_bci;
390 int current_bci = bci(thread);
391
392 if (thread->frames_to_pop_failed_realloc() > 0) {
393 // Allocation of scalar replaced object used in this frame
394 // failed. Unconditionally pop the frame.
395 thread->dec_frames_to_pop_failed_realloc();
396 thread->set_vm_result(h_exception());
397 // If the method is synchronized we already unlocked the monitor
398 // during deoptimization so the interpreter needs to skip it when
399 // the frame is popped.
400 thread->set_do_not_unlock_if_synchronized(true);
401 #ifdef CC_INTERP
402 return (address) -1;
403 #else
404 return Interpreter::remove_activation_entry();
405 #endif
406 }
407
408 // Need to do this check first since when _do_not_unlock_if_synchronized
409 // is set, we don't want to trigger any classloading which may make calls
410 // into java, or surprisingly find a matching exception handler for bci 0
411 // since at this moment the method hasn't been "officially" entered yet.
412 if (thread->do_not_unlock_if_synchronized()) {
413 ResourceMark rm;
414 assert(current_bci == 0, "bci isn't zero for do_not_unlock_if_synchronized");
415 thread->set_vm_result(exception);
416 #ifdef CC_INTERP
417 return (address) -1;
418 #else
419 return Interpreter::remove_activation_entry();
420 #endif
421 }
422
423 do {
424 should_repeat = false;
425
426 // assertions
427 #ifdef ASSERT
428 assert(h_exception.not_null(), "NULL exceptions should be handled by athrow");
429 assert(h_exception->is_oop(), "just checking");
430 // Check that exception is a subclass of Throwable, otherwise we have a VerifyError
431 if (!(h_exception->is_a(SystemDictionary::Throwable_klass()))) {
432 if (ExitVMOnVerifyError) vm_exit(-1);
433 ShouldNotReachHere();
434 }
435 #endif
436
437 // tracing
438 if (TraceExceptions) {
439 ResourceMark rm(thread);
440 Symbol* message = java_lang_Throwable::detail_message(h_exception());
441 ttyLocker ttyl; // Lock after getting the detail message
442 if (message != NULL) {
443 tty->print_cr("Exception <%s: %s> (" INTPTR_FORMAT ")",
444 h_exception->print_value_string(), message->as_C_string(),
445 (address)h_exception());
446 } else {
447 tty->print_cr("Exception <%s> (" INTPTR_FORMAT ")",
448 h_exception->print_value_string(),
449 (address)h_exception());
450 }
451 tty->print_cr(" thrown in interpreter method <%s>", h_method->print_value_string());
452 tty->print_cr(" at bci %d for thread " INTPTR_FORMAT, current_bci, thread);
453 }
454 // Don't go paging in something which won't be used.
455 // else if (extable->length() == 0) {
456 // // disabled for now - interpreter is not using shortcut yet
457 // // (shortcut is not to call runtime if we have no exception handlers)
458 // // warning("performance bug: should not call runtime if method has no exception handlers");
459 // }
460 // for AbortVMOnException flag
461 NOT_PRODUCT(Exceptions::debug_check_abort(h_exception));
462
463 // exception handler lookup
464 KlassHandle h_klass(THREAD, h_exception->klass());
465 handler_bci = Method::fast_exception_handler_bci_for(h_method, h_klass, current_bci, THREAD);
466 if (HAS_PENDING_EXCEPTION) {
467 // We threw an exception while trying to find the exception handler.
468 // Transfer the new exception to the exception handle which will
469 // be set into thread local storage, and do another lookup for an
470 // exception handler for this exception, this time starting at the
471 // BCI of the exception handler which caused the exception to be
472 // thrown (bug 4307310).
473 h_exception = Handle(THREAD, PENDING_EXCEPTION);
474 CLEAR_PENDING_EXCEPTION;
475 if (handler_bci >= 0) {
476 current_bci = handler_bci;
477 should_repeat = true;
478 }
479 }
480 } while (should_repeat == true);
481
482 // notify JVMTI of an exception throw; JVMTI will detect if this is a first
483 // time throw or a stack unwinding throw and accordingly notify the debugger
484 if (JvmtiExport::can_post_on_exceptions()) {
485 JvmtiExport::post_exception_throw(thread, h_method(), bcp(thread), h_exception());
486 }
487
488 #ifdef CC_INTERP
489 address continuation = (address)(intptr_t) handler_bci;
490 #else
491 address continuation = NULL;
492 #endif
493 address handler_pc = NULL;
494 if (handler_bci < 0 || !thread->reguard_stack((address) &continuation)) {
495 // Forward exception to callee (leaving bci/bcp untouched) because (a) no
496 // handler in this method, or (b) after a stack overflow there is not yet
497 // enough stack space available to reprotect the stack.
498 #ifndef CC_INTERP
499 continuation = Interpreter::remove_activation_entry();
500 #endif
501 // Count this for compilation purposes
502 h_method->interpreter_throwout_increment(THREAD);
503 } else {
504 // handler in this method => change bci/bcp to handler bci/bcp and continue there
505 handler_pc = h_method->code_base() + handler_bci;
506 #ifndef CC_INTERP
507 set_bcp_and_mdp(handler_pc, thread);
508 continuation = Interpreter::dispatch_table(vtos)[*handler_pc];
509 #endif
510 }
511 // notify debugger of an exception catch
512 // (this is good for exceptions caught in native methods as well)
513 if (JvmtiExport::can_post_on_exceptions()) {
514 JvmtiExport::notice_unwind_due_to_exception(thread, h_method(), handler_pc, h_exception(), (handler_pc != NULL));
515 }
516
517 thread->set_vm_result(h_exception());
518 return continuation;
519 IRT_END
520
521
522 IRT_ENTRY(void, InterpreterRuntime::throw_pending_exception(JavaThread* thread))
523 assert(thread->has_pending_exception(), "must only ne called if there's an exception pending");
524 // nothing to do - eventually we should remove this code entirely (see comments @ call sites)
525 IRT_END
526
527
528 IRT_ENTRY(void, InterpreterRuntime::throw_AbstractMethodError(JavaThread* thread))
529 THROW(vmSymbols::java_lang_AbstractMethodError());
530 IRT_END
531
532
533 IRT_ENTRY(void, InterpreterRuntime::throw_IncompatibleClassChangeError(JavaThread* thread))
534 THROW(vmSymbols::java_lang_IncompatibleClassChangeError());
535 IRT_END
536
537
538 //------------------------------------------------------------------------------------------------------------------------
539 // Fields
540 //
541
542 void InterpreterRuntime::resolve_get_put(JavaThread* thread, Bytecodes::Code bytecode) {
543 Thread* THREAD = thread;
544 // resolve field
545 fieldDescriptor info;
546 constantPoolHandle pool(thread, method(thread)->constants());
547 bool is_put = (bytecode == Bytecodes::_putfield || bytecode == Bytecodes::_nofast_putfield ||
548 bytecode == Bytecodes::_putstatic);
549 bool is_static = (bytecode == Bytecodes::_getstatic || bytecode == Bytecodes::_putstatic);
550
551 {
552 JvmtiHideSingleStepping jhss(thread);
553 LinkResolver::resolve_field_access(info, pool, get_index_u2_cpcache(thread, bytecode),
554 bytecode, CHECK);
555 } // end JvmtiHideSingleStepping
556
557 // check if link resolution caused cpCache to be updated
558 ConstantPoolCacheEntry* cp_cache_entry = cache_entry(thread);
559 if (cp_cache_entry->is_resolved(bytecode)) return;
560
561 // compute auxiliary field attributes
562 TosState state = as_TosState(info.field_type());
563
564 // We need to delay resolving put instructions on final fields
565 // until we actually invoke one. This is required so we throw
566 // exceptions at the correct place. If we do not resolve completely
567 // in the current pass, leaving the put_code set to zero will
568 // cause the next put instruction to reresolve.
569 Bytecodes::Code put_code = (Bytecodes::Code)0;
570
571 // We also need to delay resolving getstatic instructions until the
572 // class is intitialized. This is required so that access to the static
573 // field will call the initialization function every time until the class
574 // is completely initialized ala. in 2.17.5 in JVM Specification.
575 InstanceKlass* klass = InstanceKlass::cast(info.field_holder());
576 bool uninitialized_static = ((bytecode == Bytecodes::_getstatic || bytecode == Bytecodes::_putstatic) &&
577 !klass->is_initialized());
578 Bytecodes::Code get_code = (Bytecodes::Code)0;
579
580 if (!uninitialized_static) {
581 get_code = ((is_static) ? Bytecodes::_getstatic : Bytecodes::_getfield);
582 if (is_put || !info.access_flags().is_final()) {
583 put_code = ((is_static) ? Bytecodes::_putstatic : Bytecodes::_putfield);
584 }
585 }
586
587 cp_cache_entry->set_field(
588 get_code,
589 put_code,
590 info.field_holder(),
591 info.index(),
592 info.offset(),
593 state,
594 info.access_flags().is_final(),
595 info.access_flags().is_volatile(),
596 pool->pool_holder()
597 );
598 }
599
600
601 //------------------------------------------------------------------------------------------------------------------------
602 // Synchronization
603 //
604 // The interpreter's synchronization code is factored out so that it can
605 // be shared by method invocation and synchronized blocks.
606 //%note synchronization_3
607
608 //%note monitor_1
609 IRT_ENTRY_NO_ASYNC(void, InterpreterRuntime::monitorenter(JavaThread* thread, BasicObjectLock* elem))
610 #ifdef ASSERT
611 thread->last_frame().interpreter_frame_verify_monitor(elem);
612 #endif
613 if (PrintBiasedLockingStatistics) {
614 Atomic::inc(BiasedLocking::slow_path_entry_count_addr());
615 }
616 Handle h_obj(thread, elem->obj());
617 assert(Universe::heap()->is_in_reserved_or_null(h_obj()),
618 "must be NULL or an object");
619 if (UseBiasedLocking) {
620 // Retry fast entry if bias is revoked to avoid unnecessary inflation
621 ObjectSynchronizer::fast_enter(h_obj, elem->lock(), true, CHECK);
622 } else {
623 ObjectSynchronizer::slow_enter(h_obj, elem->lock(), CHECK);
624 }
625 assert(Universe::heap()->is_in_reserved_or_null(elem->obj()),
626 "must be NULL or an object");
627 #ifdef ASSERT
628 thread->last_frame().interpreter_frame_verify_monitor(elem);
629 #endif
630 IRT_END
631
632
633 //%note monitor_1
634 IRT_ENTRY_NO_ASYNC(void, InterpreterRuntime::monitorexit(JavaThread* thread, BasicObjectLock* elem))
635 #ifdef ASSERT
636 thread->last_frame().interpreter_frame_verify_monitor(elem);
637 #endif
638 Handle h_obj(thread, elem->obj());
639 assert(Universe::heap()->is_in_reserved_or_null(h_obj()),
640 "must be NULL or an object");
641 if (elem == NULL || h_obj()->is_unlocked()) {
642 THROW(vmSymbols::java_lang_IllegalMonitorStateException());
643 }
644 ObjectSynchronizer::slow_exit(h_obj(), elem->lock(), thread);
645 // Free entry. This must be done here, since a pending exception might be installed on
646 // exit. If it is not cleared, the exception handling code will try to unlock the monitor again.
647 elem->set_obj(NULL);
648 #ifdef ASSERT
649 thread->last_frame().interpreter_frame_verify_monitor(elem);
650 #endif
651 IRT_END
652
653
654 IRT_ENTRY(void, InterpreterRuntime::throw_illegal_monitor_state_exception(JavaThread* thread))
655 THROW(vmSymbols::java_lang_IllegalMonitorStateException());
656 IRT_END
657
658
659 IRT_ENTRY(void, InterpreterRuntime::new_illegal_monitor_state_exception(JavaThread* thread))
660 // Returns an illegal exception to install into the current thread. The
661 // pending_exception flag is cleared so normal exception handling does not
662 // trigger. Any current installed exception will be overwritten. This
663 // method will be called during an exception unwind.
664
665 assert(!HAS_PENDING_EXCEPTION, "no pending exception");
666 Handle exception(thread, thread->vm_result());
667 assert(exception() != NULL, "vm result should be set");
668 thread->set_vm_result(NULL); // clear vm result before continuing (may cause memory leaks and assert failures)
669 if (!exception->is_a(SystemDictionary::ThreadDeath_klass())) {
670 exception = get_preinitialized_exception(
671 SystemDictionary::IllegalMonitorStateException_klass(),
672 CATCH);
673 }
674 thread->set_vm_result(exception());
675 IRT_END
676
677
678 //------------------------------------------------------------------------------------------------------------------------
679 // Invokes
680
681 IRT_ENTRY(Bytecodes::Code, InterpreterRuntime::get_original_bytecode_at(JavaThread* thread, Method* method, address bcp))
682 return method->orig_bytecode_at(method->bci_from(bcp));
683 IRT_END
684
685 IRT_ENTRY(void, InterpreterRuntime::set_original_bytecode_at(JavaThread* thread, Method* method, address bcp, Bytecodes::Code new_code))
686 method->set_orig_bytecode_at(method->bci_from(bcp), new_code);
687 IRT_END
688
689 IRT_ENTRY(void, InterpreterRuntime::_breakpoint(JavaThread* thread, Method* method, address bcp))
690 JvmtiExport::post_raw_breakpoint(thread, method, bcp);
691 IRT_END
692
693 void InterpreterRuntime::resolve_invoke(JavaThread* thread, Bytecodes::Code bytecode) {
694 Thread* THREAD = thread;
695 // extract receiver from the outgoing argument list if necessary
696 Handle receiver(thread, NULL);
697 if (bytecode == Bytecodes::_invokevirtual || bytecode == Bytecodes::_invokeinterface) {
698 ResourceMark rm(thread);
699 methodHandle m (thread, method(thread));
700 Bytecode_invoke call(m, bci(thread));
701 Symbol* signature = call.signature();
702 receiver = Handle(thread,
703 thread->last_frame().interpreter_callee_receiver(signature));
704 assert(Universe::heap()->is_in_reserved_or_null(receiver()),
705 "sanity check");
706 assert(receiver.is_null() ||
707 !Universe::heap()->is_in_reserved(receiver->klass()),
708 "sanity check");
709 }
710
711 // resolve method
712 CallInfo info;
713 constantPoolHandle pool(thread, method(thread)->constants());
714
715 {
716 JvmtiHideSingleStepping jhss(thread);
717 LinkResolver::resolve_invoke(info, receiver, pool,
718 get_index_u2_cpcache(thread, bytecode), bytecode,
719 CHECK);
720 if (JvmtiExport::can_hotswap_or_post_breakpoint()) {
721 int retry_count = 0;
722 while (info.resolved_method()->is_old()) {
723 // It is very unlikely that method is redefined more than 100 times
724 // in the middle of resolve. If it is looping here more than 100 times
725 // means then there could be a bug here.
726 guarantee((retry_count++ < 100),
727 "Could not resolve to latest version of redefined method");
728 // method is redefined in the middle of resolve so re-try.
729 LinkResolver::resolve_invoke(info, receiver, pool,
730 get_index_u2_cpcache(thread, bytecode), bytecode,
731 CHECK);
732 }
733 }
734 } // end JvmtiHideSingleStepping
735
736 // check if link resolution caused cpCache to be updated
737 ConstantPoolCacheEntry* cp_cache_entry = cache_entry(thread);
738 if (cp_cache_entry->is_resolved(bytecode)) return;
739
740 if (bytecode == Bytecodes::_invokeinterface) {
741 if (TraceItables && Verbose) {
742 ResourceMark rm(thread);
743 tty->print_cr("Resolving: klass: %s to method: %s", info.resolved_klass()->name()->as_C_string(), info.resolved_method()->name()->as_C_string());
744 }
745 }
746 #ifdef ASSERT
747 if (bytecode == Bytecodes::_invokeinterface) {
748 if (info.resolved_method()->method_holder() ==
749 SystemDictionary::Object_klass()) {
750 // NOTE: THIS IS A FIX FOR A CORNER CASE in the JVM spec
751 // (see also CallInfo::set_interface for details)
752 assert(info.call_kind() == CallInfo::vtable_call ||
753 info.call_kind() == CallInfo::direct_call, "");
754 methodHandle rm = info.resolved_method();
755 assert(rm->is_final() || info.has_vtable_index(),
756 "should have been set already");
757 } else if (!info.resolved_method()->has_itable_index()) {
758 // Resolved something like CharSequence.toString. Use vtable not itable.
759 assert(info.call_kind() != CallInfo::itable_call, "");
760 } else {
761 // Setup itable entry
762 assert(info.call_kind() == CallInfo::itable_call, "");
763 int index = info.resolved_method()->itable_index();
764 assert(info.itable_index() == index, "");
765 }
766 } else {
767 assert(info.call_kind() == CallInfo::direct_call ||
768 info.call_kind() == CallInfo::vtable_call, "");
769 }
770 #endif
771 switch (info.call_kind()) {
772 case CallInfo::direct_call:
773 cp_cache_entry->set_direct_call(
774 bytecode,
775 info.resolved_method());
776 break;
777 case CallInfo::vtable_call:
778 cp_cache_entry->set_vtable_call(
779 bytecode,
780 info.resolved_method(),
781 info.vtable_index());
782 break;
783 case CallInfo::itable_call:
784 cp_cache_entry->set_itable_call(
785 bytecode,
786 info.resolved_method(),
787 info.itable_index());
788 break;
789 default: ShouldNotReachHere();
790 }
791 }
792
793
794 // First time execution: Resolve symbols, create a permanent MethodType object.
795 void InterpreterRuntime::resolve_invokehandle(JavaThread* thread) {
796 Thread* THREAD = thread;
797 const Bytecodes::Code bytecode = Bytecodes::_invokehandle;
798
799 // resolve method
800 CallInfo info;
801 constantPoolHandle pool(thread, method(thread)->constants());
802 {
803 JvmtiHideSingleStepping jhss(thread);
804 LinkResolver::resolve_invoke(info, Handle(), pool,
805 get_index_u2_cpcache(thread, bytecode), bytecode,
806 CHECK);
807 } // end JvmtiHideSingleStepping
808
809 ConstantPoolCacheEntry* cp_cache_entry = cache_entry(thread);
810 cp_cache_entry->set_method_handle(pool, info);
811 }
812
813 // First time execution: Resolve symbols, create a permanent CallSite object.
814 void InterpreterRuntime::resolve_invokedynamic(JavaThread* thread) {
815 Thread* THREAD = thread;
816 const Bytecodes::Code bytecode = Bytecodes::_invokedynamic;
817
818 //TO DO: consider passing BCI to Java.
819 // int caller_bci = method(thread)->bci_from(bcp(thread));
820
821 // resolve method
822 CallInfo info;
823 constantPoolHandle pool(thread, method(thread)->constants());
824 int index = get_index_u4(thread, bytecode);
825 {
826 JvmtiHideSingleStepping jhss(thread);
827 LinkResolver::resolve_invoke(info, Handle(), pool,
828 index, bytecode, CHECK);
829 } // end JvmtiHideSingleStepping
830
831 ConstantPoolCacheEntry* cp_cache_entry = pool->invokedynamic_cp_cache_entry_at(index);
832 cp_cache_entry->set_dynamic_call(pool, info);
833 }
834
835 // This function is the interface to the assembly code. It returns the resolved
836 // cpCache entry. This doesn't safepoint, but the helper routines safepoint.
837 // This function will check for redefinition!
838 IRT_ENTRY(void, InterpreterRuntime::resolve_from_cache(JavaThread* thread, Bytecodes::Code bytecode)) {
839 switch (bytecode) {
840 case Bytecodes::_getstatic:
841 case Bytecodes::_putstatic:
842 case Bytecodes::_getfield:
843 case Bytecodes::_putfield:
844 resolve_get_put(thread, bytecode);
845 break;
846 case Bytecodes::_invokevirtual:
847 case Bytecodes::_invokespecial:
848 case Bytecodes::_invokestatic:
849 case Bytecodes::_invokeinterface:
850 resolve_invoke(thread, bytecode);
851 break;
852 case Bytecodes::_invokehandle:
853 resolve_invokehandle(thread);
854 break;
855 case Bytecodes::_invokedynamic:
856 resolve_invokedynamic(thread);
857 break;
858 default:
859 fatal(err_msg("unexpected bytecode: %s", Bytecodes::name(bytecode)));
860 break;
861 }
862 }
863 IRT_END
864
865 //------------------------------------------------------------------------------------------------------------------------
866 // Miscellaneous
867
868
869 nmethod* InterpreterRuntime::frequency_counter_overflow(JavaThread* thread, address branch_bcp) {
870 nmethod* nm = frequency_counter_overflow_inner(thread, branch_bcp);
871 assert(branch_bcp != NULL || nm == NULL, "always returns null for non OSR requests");
872 if (branch_bcp != NULL && nm != NULL) {
873 // This was a successful request for an OSR nmethod. Because
874 // frequency_counter_overflow_inner ends with a safepoint check,
875 // nm could have been unloaded so look it up again. It's unsafe
876 // to examine nm directly since it might have been freed and used
877 // for something else.
878 frame fr = thread->last_frame();
879 Method* method = fr.interpreter_frame_method();
880 int bci = method->bci_from(fr.interpreter_frame_bcp());
881 nm = method->lookup_osr_nmethod_for(bci, CompLevel_none, false);
882 }
883 #ifndef PRODUCT
884 if (TraceOnStackReplacement) {
885 if (nm != NULL) {
886 tty->print("OSR entry @ pc: " INTPTR_FORMAT ": ", nm->osr_entry());
887 nm->print();
888 }
889 }
890 #endif
891 return nm;
892 }
893
894 IRT_ENTRY(nmethod*,
895 InterpreterRuntime::frequency_counter_overflow_inner(JavaThread* thread, address branch_bcp))
896 // use UnlockFlagSaver to clear and restore the _do_not_unlock_if_synchronized
897 // flag, in case this method triggers classloading which will call into Java.
898 UnlockFlagSaver fs(thread);
899
900 frame fr = thread->last_frame();
901 assert(fr.is_interpreted_frame(), "must come from interpreter");
902 methodHandle method(thread, fr.interpreter_frame_method());
903 const int branch_bci = branch_bcp != NULL ? method->bci_from(branch_bcp) : InvocationEntryBci;
904 const int bci = branch_bcp != NULL ? method->bci_from(fr.interpreter_frame_bcp()) : InvocationEntryBci;
905
906 assert(!HAS_PENDING_EXCEPTION, "Should not have any exceptions pending");
907 nmethod* osr_nm = CompilationPolicy::policy()->event(method, method, branch_bci, bci, CompLevel_none, NULL, thread);
908 assert(!HAS_PENDING_EXCEPTION, "Event handler should not throw any exceptions");
909
910 if (osr_nm != NULL) {
911 // We may need to do on-stack replacement which requires that no
912 // monitors in the activation are biased because their
913 // BasicObjectLocks will need to migrate during OSR. Force
914 // unbiasing of all monitors in the activation now (even though
915 // the OSR nmethod might be invalidated) because we don't have a
916 // safepoint opportunity later once the migration begins.
917 if (UseBiasedLocking) {
918 ResourceMark rm;
919 GrowableArray<Handle>* objects_to_revoke = new GrowableArray<Handle>();
920 for( BasicObjectLock *kptr = fr.interpreter_frame_monitor_end();
921 kptr < fr.interpreter_frame_monitor_begin();
922 kptr = fr.next_monitor_in_interpreter_frame(kptr) ) {
923 if( kptr->obj() != NULL ) {
924 objects_to_revoke->append(Handle(THREAD, kptr->obj()));
925 }
926 }
927 BiasedLocking::revoke(objects_to_revoke);
928 }
929 }
930 return osr_nm;
931 IRT_END
932
933 IRT_LEAF(jint, InterpreterRuntime::bcp_to_di(Method* method, address cur_bcp))
934 assert(ProfileInterpreter, "must be profiling interpreter");
935 int bci = method->bci_from(cur_bcp);
936 MethodData* mdo = method->method_data();
937 if (mdo == NULL) return 0;
938 return mdo->bci_to_di(bci);
939 IRT_END
940
941 IRT_ENTRY(void, InterpreterRuntime::profile_method(JavaThread* thread))
942 // use UnlockFlagSaver to clear and restore the _do_not_unlock_if_synchronized
943 // flag, in case this method triggers classloading which will call into Java.
944 UnlockFlagSaver fs(thread);
945
946 assert(ProfileInterpreter, "must be profiling interpreter");
947 frame fr = thread->last_frame();
948 assert(fr.is_interpreted_frame(), "must come from interpreter");
949 methodHandle method(thread, fr.interpreter_frame_method());
950 Method::build_interpreter_method_data(method, THREAD);
951 if (HAS_PENDING_EXCEPTION) {
952 assert((PENDING_EXCEPTION->is_a(SystemDictionary::OutOfMemoryError_klass())), "we expect only an OOM error here");
953 CLEAR_PENDING_EXCEPTION;
954 // and fall through...
955 }
956 IRT_END
957
958
959 #ifdef ASSERT
960 IRT_LEAF(void, InterpreterRuntime::verify_mdp(Method* method, address bcp, address mdp))
961 assert(ProfileInterpreter, "must be profiling interpreter");
962
963 MethodData* mdo = method->method_data();
964 assert(mdo != NULL, "must not be null");
965
966 int bci = method->bci_from(bcp);
967
968 address mdp2 = mdo->bci_to_dp(bci);
969 if (mdp != mdp2) {
970 ResourceMark rm;
971 ResetNoHandleMark rnm; // In a LEAF entry.
972 HandleMark hm;
973 tty->print_cr("FAILED verify : actual mdp %p expected mdp %p @ bci %d", mdp, mdp2, bci);
974 int current_di = mdo->dp_to_di(mdp);
975 int expected_di = mdo->dp_to_di(mdp2);
976 tty->print_cr(" actual di %d expected di %d", current_di, expected_di);
977 int expected_approx_bci = mdo->data_at(expected_di)->bci();
978 int approx_bci = -1;
979 if (current_di >= 0) {
980 approx_bci = mdo->data_at(current_di)->bci();
981 }
982 tty->print_cr(" actual bci is %d expected bci %d", approx_bci, expected_approx_bci);
983 mdo->print_on(tty);
984 method->print_codes();
985 }
986 assert(mdp == mdp2, "wrong mdp");
987 IRT_END
988 #endif // ASSERT
989
990 IRT_ENTRY(void, InterpreterRuntime::update_mdp_for_ret(JavaThread* thread, int return_bci))
991 assert(ProfileInterpreter, "must be profiling interpreter");
992 ResourceMark rm(thread);
993 HandleMark hm(thread);
994 frame fr = thread->last_frame();
995 assert(fr.is_interpreted_frame(), "must come from interpreter");
996 MethodData* h_mdo = fr.interpreter_frame_method()->method_data();
997
998 // Grab a lock to ensure atomic access to setting the return bci and
999 // the displacement. This can block and GC, invalidating all naked oops.
1000 MutexLocker ml(RetData_lock);
1001
1002 // ProfileData is essentially a wrapper around a derived oop, so we
1003 // need to take the lock before making any ProfileData structures.
1004 ProfileData* data = h_mdo->data_at(h_mdo->dp_to_di(fr.interpreter_frame_mdp()));
1005 RetData* rdata = data->as_RetData();
1006 address new_mdp = rdata->fixup_ret(return_bci, h_mdo);
1007 fr.interpreter_frame_set_mdp(new_mdp);
1008 IRT_END
1009
1010 IRT_ENTRY(MethodCounters*, InterpreterRuntime::build_method_counters(JavaThread* thread, Method* m))
1011 MethodCounters* mcs = Method::build_method_counters(m, thread);
1012 if (HAS_PENDING_EXCEPTION) {
1013 assert((PENDING_EXCEPTION->is_a(SystemDictionary::OutOfMemoryError_klass())), "we expect only an OOM error here");
1014 CLEAR_PENDING_EXCEPTION;
1015 }
1016 return mcs;
1017 IRT_END
1018
1019
1020 IRT_ENTRY(void, InterpreterRuntime::at_safepoint(JavaThread* thread))
1021 // We used to need an explict preserve_arguments here for invoke bytecodes. However,
1022 // stack traversal automatically takes care of preserving arguments for invoke, so
1023 // this is no longer needed.
1024
1025 // IRT_END does an implicit safepoint check, hence we are guaranteed to block
1026 // if this is called during a safepoint
1027
1028 if (JvmtiExport::should_post_single_step()) {
1029 // We are called during regular safepoints and when the VM is
1030 // single stepping. If any thread is marked for single stepping,
1031 // then we may have JVMTI work to do.
1032 JvmtiExport::at_single_stepping_point(thread, method(thread), bcp(thread));
1033 }
1034 IRT_END
1035
1036 IRT_ENTRY(void, InterpreterRuntime::post_field_access(JavaThread *thread, oopDesc* obj,
1037 ConstantPoolCacheEntry *cp_entry))
1038
1039 // check the access_flags for the field in the klass
1040
1041 InstanceKlass* ik = InstanceKlass::cast(cp_entry->f1_as_klass());
1042 int index = cp_entry->field_index();
1043 if ((ik->field_access_flags(index) & JVM_ACC_FIELD_ACCESS_WATCHED) == 0) return;
1044
1045 bool is_static = (obj == NULL);
1046 HandleMark hm(thread);
1047
1048 Handle h_obj;
1049 if (!is_static) {
1050 // non-static field accessors have an object, but we need a handle
1051 h_obj = Handle(thread, obj);
1052 }
1053 instanceKlassHandle h_cp_entry_f1(thread, (Klass*)cp_entry->f1_as_klass());
1054 jfieldID fid = jfieldIDWorkaround::to_jfieldID(h_cp_entry_f1, cp_entry->f2_as_index(), is_static);
1055 JvmtiExport::post_field_access(thread, method(thread), bcp(thread), h_cp_entry_f1, h_obj, fid);
1056 IRT_END
1057
1058 IRT_ENTRY(void, InterpreterRuntime::post_field_modification(JavaThread *thread,
1059 oopDesc* obj, ConstantPoolCacheEntry *cp_entry, jvalue *value))
1060
1061 Klass* k = (Klass*)cp_entry->f1_as_klass();
1062
1063 // check the access_flags for the field in the klass
1064 InstanceKlass* ik = InstanceKlass::cast(k);
1065 int index = cp_entry->field_index();
1066 // bail out if field modifications are not watched
1067 if ((ik->field_access_flags(index) & JVM_ACC_FIELD_MODIFICATION_WATCHED) == 0) return;
1068
1069 char sig_type = '\0';
1070
1071 switch(cp_entry->flag_state()) {
1072 case btos: sig_type = 'Z'; break;
1073 case ctos: sig_type = 'C'; break;
1074 case stos: sig_type = 'S'; break;
1075 case itos: sig_type = 'I'; break;
1076 case ftos: sig_type = 'F'; break;
1077 case atos: sig_type = 'L'; break;
1078 case ltos: sig_type = 'J'; break;
1079 case dtos: sig_type = 'D'; break;
1080 default: ShouldNotReachHere(); return;
1081 }
1082 bool is_static = (obj == NULL);
1083
1084 HandleMark hm(thread);
1085 instanceKlassHandle h_klass(thread, k);
1086 jfieldID fid = jfieldIDWorkaround::to_jfieldID(h_klass, cp_entry->f2_as_index(), is_static);
1087 jvalue fvalue;
1088 #ifdef _LP64
1089 fvalue = *value;
1090 #else
1091 // Long/double values are stored unaligned and also noncontiguously with
1092 // tagged stacks. We can't just do a simple assignment even in the non-
1093 // J/D cases because a C++ compiler is allowed to assume that a jvalue is
1094 // 8-byte aligned, and interpreter stack slots are only 4-byte aligned.
1095 // We assume that the two halves of longs/doubles are stored in interpreter
1096 // stack slots in platform-endian order.
1097 jlong_accessor u;
1098 jint* newval = (jint*)value;
1099 u.words[0] = newval[0];
1100 u.words[1] = newval[Interpreter::stackElementWords]; // skip if tag
1101 fvalue.j = u.long_value;
1102 #endif // _LP64
1103
1104 Handle h_obj;
1105 if (!is_static) {
1106 // non-static field accessors have an object, but we need a handle
1107 h_obj = Handle(thread, obj);
1108 }
1109
1110 JvmtiExport::post_raw_field_modification(thread, method(thread), bcp(thread), h_klass, h_obj,
1111 fid, sig_type, &fvalue);
1112 IRT_END
1113
1114 IRT_ENTRY(void, InterpreterRuntime::post_method_entry(JavaThread *thread))
1115 JvmtiExport::post_method_entry(thread, InterpreterRuntime::method(thread), InterpreterRuntime::last_frame(thread));
1116 IRT_END
1117
1118
1119 IRT_ENTRY(void, InterpreterRuntime::post_method_exit(JavaThread *thread))
1120 JvmtiExport::post_method_exit(thread, InterpreterRuntime::method(thread), InterpreterRuntime::last_frame(thread));
1121 IRT_END
1122
1123 IRT_LEAF(int, InterpreterRuntime::interpreter_contains(address pc))
1124 {
1125 return (Interpreter::contains(pc) ? 1 : 0);
1126 }
1127 IRT_END
1128
1129
1130 // Implementation of SignatureHandlerLibrary
1131
1132 address SignatureHandlerLibrary::set_handler_blob() {
1133 BufferBlob* handler_blob = BufferBlob::create("native signature handlers", blob_size);
1134 if (handler_blob == NULL) {
1135 return NULL;
1136 }
1137 address handler = handler_blob->code_begin();
1138 _handler_blob = handler_blob;
1139 _handler = handler;
1140 return handler;
1141 }
1142
1143 void SignatureHandlerLibrary::initialize() {
1144 if (_fingerprints != NULL) {
1145 return;
1146 }
1147 if (set_handler_blob() == NULL) {
1148 vm_exit_out_of_memory(blob_size, OOM_MALLOC_ERROR, "native signature handlers");
1149 }
1150
1151 BufferBlob* bb = BufferBlob::create("Signature Handler Temp Buffer",
1152 SignatureHandlerLibrary::buffer_size);
1153 _buffer = bb->code_begin();
1154
1155 _fingerprints = new(ResourceObj::C_HEAP, mtCode)GrowableArray<uint64_t>(32, true);
1156 _handlers = new(ResourceObj::C_HEAP, mtCode)GrowableArray<address>(32, true);
1157 }
1158
1159 address SignatureHandlerLibrary::set_handler(CodeBuffer* buffer) {
1160 address handler = _handler;
1161 int insts_size = buffer->pure_insts_size();
1162 if (handler + insts_size > _handler_blob->code_end()) {
1163 // get a new handler blob
1164 handler = set_handler_blob();
1165 }
1166 if (handler != NULL) {
1167 memcpy(handler, buffer->insts_begin(), insts_size);
1168 pd_set_handler(handler);
1169 ICache::invalidate_range(handler, insts_size);
1170 _handler = handler + insts_size;
1171 }
1172 return handler;
1173 }
1174
1175 void SignatureHandlerLibrary::add(methodHandle method) {
1176 if (method->signature_handler() == NULL) {
1177 // use slow signature handler if we can't do better
1178 int handler_index = -1;
1179 // check if we can use customized (fast) signature handler
1180 if (UseFastSignatureHandlers && method->size_of_parameters() <= Fingerprinter::max_size_of_parameters) {
1181 // use customized signature handler
1182 MutexLocker mu(SignatureHandlerLibrary_lock);
1183 // make sure data structure is initialized
1184 initialize();
1185 // lookup method signature's fingerprint
1186 uint64_t fingerprint = Fingerprinter(method).fingerprint();
1187 handler_index = _fingerprints->find(fingerprint);
1188 // create handler if necessary
1189 if (handler_index < 0) {
1190 ResourceMark rm;
1191 ptrdiff_t align_offset = (address)
1192 round_to((intptr_t)_buffer, CodeEntryAlignment) - (address)_buffer;
1193 CodeBuffer buffer((address)(_buffer + align_offset),
1194 SignatureHandlerLibrary::buffer_size - align_offset);
1195 InterpreterRuntime::SignatureHandlerGenerator(method, &buffer).generate(fingerprint);
1196 // copy into code heap
1197 address handler = set_handler(&buffer);
1198 if (handler == NULL) {
1199 // use slow signature handler
1200 } else {
1201 // debugging suppport
1202 if (PrintSignatureHandlers) {
1203 tty->cr();
1204 tty->print_cr("argument handler #%d for: %s %s (fingerprint = " UINT64_FORMAT ", %d bytes generated)",
1205 _handlers->length(),
1206 (method->is_static() ? "static" : "receiver"),
1207 method->name_and_sig_as_C_string(),
1208 fingerprint,
1209 buffer.insts_size());
1210 Disassembler::decode(handler, handler + buffer.insts_size());
1211 #ifndef PRODUCT
1212 tty->print_cr(" --- associated result handler ---");
1213 address rh_begin = Interpreter::result_handler(method()->result_type());
1214 address rh_end = rh_begin;
1215 while (*(int*)rh_end != 0) {
1216 rh_end += sizeof(int);
1217 }
1218 Disassembler::decode(rh_begin, rh_end);
1219 #endif
1220 }
1221 // add handler to library
1222 _fingerprints->append(fingerprint);
1223 _handlers->append(handler);
1224 // set handler index
1225 assert(_fingerprints->length() == _handlers->length(), "sanity check");
1226 handler_index = _fingerprints->length() - 1;
1227 }
1228 }
1229 // Set handler under SignatureHandlerLibrary_lock
1230 if (handler_index < 0) {
1231 // use generic signature handler
1232 method->set_signature_handler(Interpreter::slow_signature_handler());
1233 } else {
1234 // set handler
1235 method->set_signature_handler(_handlers->at(handler_index));
1236 }
1237 } else {
1238 CHECK_UNHANDLED_OOPS_ONLY(Thread::current()->clear_unhandled_oops());
1239 // use generic signature handler
1240 method->set_signature_handler(Interpreter::slow_signature_handler());
1241 }
1242 }
1243 #ifdef ASSERT
1244 int handler_index = -1;
1245 int fingerprint_index = -2;
1246 {
1247 // '_handlers' and '_fingerprints' are 'GrowableArray's and are NOT synchronized
1248 // in any way if accessed from multiple threads. To avoid races with another
1249 // thread which may change the arrays in the above, mutex protected block, we
1250 // have to protect this read access here with the same mutex as well!
1251 MutexLocker mu(SignatureHandlerLibrary_lock);
1252 if (_handlers != NULL) {
1253 handler_index = _handlers->find(method->signature_handler());
1254 fingerprint_index = _fingerprints->find(Fingerprinter(method).fingerprint());
1255 }
1256 }
1257 assert(method->signature_handler() == Interpreter::slow_signature_handler() ||
1258 handler_index == fingerprint_index, "sanity check");
1259 #endif // ASSERT
1260 }
1261
1262
1263 BufferBlob* SignatureHandlerLibrary::_handler_blob = NULL;
1264 address SignatureHandlerLibrary::_handler = NULL;
1265 GrowableArray<uint64_t>* SignatureHandlerLibrary::_fingerprints = NULL;
1266 GrowableArray<address>* SignatureHandlerLibrary::_handlers = NULL;
1267 address SignatureHandlerLibrary::_buffer = NULL;
1268
1269
1270 IRT_ENTRY(void, InterpreterRuntime::prepare_native_call(JavaThread* thread, Method* method))
1271 methodHandle m(thread, method);
1272 assert(m->is_native(), "sanity check");
1273 // lookup native function entry point if it doesn't exist
1274 bool in_base_library;
1275 if (!m->has_native_function()) {
1276 NativeLookup::lookup(m, in_base_library, CHECK);
1277 }
1278 // make sure signature handler is installed
1279 SignatureHandlerLibrary::add(m);
1280 // The interpreter entry point checks the signature handler first,
1281 // before trying to fetch the native entry point and klass mirror.
1282 // We must set the signature handler last, so that multiple processors
1283 // preparing the same method will be sure to see non-null entry & mirror.
1284 IRT_END
1285
1286 #if defined(IA32) || defined(AMD64) || defined(ARM)
1287 IRT_LEAF(void, InterpreterRuntime::popframe_move_outgoing_args(JavaThread* thread, void* src_address, void* dest_address))
1288 if (src_address == dest_address) {
1289 return;
1290 }
1291 ResetNoHandleMark rnm; // In a LEAF entry.
1292 HandleMark hm;
1293 ResourceMark rm;
1294 frame fr = thread->last_frame();
1295 assert(fr.is_interpreted_frame(), "");
1296 jint bci = fr.interpreter_frame_bci();
1297 methodHandle mh(thread, fr.interpreter_frame_method());
1298 Bytecode_invoke invoke(mh, bci);
1299 ArgumentSizeComputer asc(invoke.signature());
1300 int size_of_arguments = (asc.size() + (invoke.has_receiver() ? 1 : 0)); // receiver
1301 Copy::conjoint_jbytes(src_address, dest_address,
1302 size_of_arguments * Interpreter::stackElementSize);
1303 IRT_END
1304 #endif
1305
1306 #if INCLUDE_JVMTI
1307 // This is a support of the JVMTI PopFrame interface.
1308 // Make sure it is an invokestatic of a polymorphic intrinsic that has a member_name argument
1309 // and return it as a vm_result so that it can be reloaded in the list of invokestatic parameters.
1310 // The member_name argument is a saved reference (in local#0) to the member_name.
1311 // For backward compatibility with some JDK versions (7, 8) it can also be a direct method handle.
1312 // FIXME: remove DMH case after j.l.i.InvokerBytecodeGenerator code shape is updated.
1313 IRT_ENTRY(void, InterpreterRuntime::member_name_arg_or_null(JavaThread* thread, address member_name,
1314 Method* method, address bcp))
1315 Bytecodes::Code code = Bytecodes::code_at(method, bcp);
1316 if (code != Bytecodes::_invokestatic) {
1317 return;
1318 }
1319 ConstantPool* cpool = method->constants();
1320 int cp_index = Bytes::get_native_u2(bcp + 1) + ConstantPool::CPCACHE_INDEX_TAG;
1321 Symbol* cname = cpool->klass_name_at(cpool->klass_ref_index_at(cp_index));
1322 Symbol* mname = cpool->name_ref_at(cp_index);
1323
1324 if (MethodHandles::has_member_arg(cname, mname)) {
1325 oop member_name_oop = (oop) member_name;
1326 if (java_lang_invoke_DirectMethodHandle::is_instance(member_name_oop)) {
1327 // FIXME: remove after j.l.i.InvokerBytecodeGenerator code shape is updated.
1328 member_name_oop = java_lang_invoke_DirectMethodHandle::member(member_name_oop);
1329 }
1330 thread->set_vm_result(member_name_oop);
1331 } else {
1332 thread->set_vm_result(NULL);
1333 }
1334 IRT_END
1335 #endif // INCLUDE_JVMTI