1 /*
2 * Copyright (c) 1997, 2018, 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/systemDictionary.hpp"
27 #include "classfile/vmSymbols.hpp"
28 #include "compiler/compileBroker.hpp"
29 #include "compiler/disassembler.hpp"
30 #include "gc_interface/collectedHeap.hpp"
31 #include "interpreter/interpreter.hpp"
32 #include "interpreter/interpreterRuntime.hpp"
33 #include "interpreter/linkResolver.hpp"
34 #include "interpreter/templateTable.hpp"
35 #include "memory/oopFactory.hpp"
36 #include "memory/universe.inline.hpp"
37 #include "oops/constantPool.hpp"
38 #include "oops/instanceKlass.hpp"
39 #include "oops/methodData.hpp"
40 #include "oops/objArrayKlass.hpp"
41 #include "oops/oop.inline.hpp"
42 #include "oops/symbol.hpp"
43 #include "prims/jvmtiExport.hpp"
44 #include "prims/nativeLookup.hpp"
45 #include "runtime/biasedLocking.hpp"
46 #include "runtime/compilationPolicy.hpp"
47 #include "runtime/deoptimization.hpp"
48 #include "runtime/fieldDescriptor.hpp"
49 #include "runtime/handles.inline.hpp"
50 #include "runtime/interfaceSupport.hpp"
51 #include "runtime/java.hpp"
52 #include "runtime/jfieldIDWorkaround.hpp"
53 #include "runtime/osThread.hpp"
54 #include "runtime/sharedRuntime.hpp"
55 #include "runtime/stubRoutines.hpp"
56 #include "runtime/synchronizer.hpp"
57 #include "runtime/threadCritical.hpp"
58 #include "utilities/events.hpp"
59 #ifdef TARGET_ARCH_x86
60 # include "vm_version_x86.hpp"
61 #endif
62 #ifdef TARGET_ARCH_aarch64
63 # include "vm_version_aarch64.hpp"
64 #endif
65 #ifdef TARGET_ARCH_sparc
66 # include "vm_version_sparc.hpp"
67 #endif
68 #ifdef TARGET_ARCH_zero
69 # include "vm_version_zero.hpp"
70 #endif
71 #ifdef TARGET_ARCH_arm
72 # include "vm_version_arm.hpp"
73 #endif
74 #ifdef TARGET_ARCH_ppc
75 # include "vm_version_ppc.hpp"
76 #endif
77 #ifdef COMPILER2
78 #include "opto/runtime.hpp"
79 #endif
80
81 PRAGMA_FORMAT_MUTE_WARNINGS_FOR_GCC
82
83 class UnlockFlagSaver {
84 private:
85 JavaThread* _thread;
86 bool _do_not_unlock;
87 public:
88 UnlockFlagSaver(JavaThread* t) {
89 _thread = t;
90 _do_not_unlock = t->do_not_unlock_if_synchronized();
91 t->set_do_not_unlock_if_synchronized(false);
92 }
93 ~UnlockFlagSaver() {
94 _thread->set_do_not_unlock_if_synchronized(_do_not_unlock);
95 }
96 };
97
98 //------------------------------------------------------------------------------------------------------------------------
99 // State accessors
100
101 void InterpreterRuntime::set_bcp_and_mdp(address bcp, JavaThread *thread) {
102 last_frame(thread).interpreter_frame_set_bcp(bcp);
103 if (ProfileInterpreter) {
104 // ProfileTraps uses MDOs independently of ProfileInterpreter.
105 // That is why we must check both ProfileInterpreter and mdo != NULL.
106 MethodData* mdo = last_frame(thread).interpreter_frame_method()->method_data();
107 if (mdo != NULL) {
108 NEEDS_CLEANUP;
109 last_frame(thread).interpreter_frame_set_mdp(mdo->bci_to_dp(last_frame(thread).interpreter_frame_bci()));
110 }
111 }
112 }
113
114 //------------------------------------------------------------------------------------------------------------------------
115 // Constants
116
117
118 IRT_ENTRY(void, InterpreterRuntime::ldc(JavaThread* thread, bool wide))
119 // access constant pool
120 ConstantPool* pool = method(thread)->constants();
121 int index = wide ? get_index_u2(thread, Bytecodes::_ldc_w) : get_index_u1(thread, Bytecodes::_ldc);
122 constantTag tag = pool->tag_at(index);
123
124 assert (tag.is_unresolved_klass() || tag.is_klass(), "wrong ldc call");
125 Klass* klass = pool->klass_at(index, CHECK);
126 oop java_class = klass->java_mirror();
127 thread->set_vm_result(java_class);
128 IRT_END
129
130 IRT_ENTRY(void, InterpreterRuntime::resolve_ldc(JavaThread* thread, Bytecodes::Code bytecode)) {
131 assert(bytecode == Bytecodes::_fast_aldc ||
132 bytecode == Bytecodes::_fast_aldc_w, "wrong bc");
133 ResourceMark rm(thread);
134 methodHandle m (thread, method(thread));
135 Bytecode_loadconstant ldc(m, bci(thread));
136 oop result = ldc.resolve_constant(CHECK);
137 #ifdef ASSERT
138 {
139 // The bytecode wrappers aren't GC-safe so construct a new one
140 Bytecode_loadconstant ldc2(m, bci(thread));
141 oop coop = m->constants()->resolved_references()->obj_at(ldc2.cache_index());
142 assert(result == coop, "expected result for assembly code");
143 }
144 #endif
145 thread->set_vm_result(result);
146 }
147 IRT_END
148
149
150 //------------------------------------------------------------------------------------------------------------------------
151 // Allocation
152
153 IRT_ENTRY(void, InterpreterRuntime::_new(JavaThread* thread, ConstantPool* pool, int index))
154 Klass* k_oop = pool->klass_at(index, CHECK);
155 instanceKlassHandle klass (THREAD, k_oop);
156
157 // Make sure we are not instantiating an abstract klass
158 klass->check_valid_for_instantiation(true, CHECK);
159
160 // Make sure klass is initialized
161 klass->initialize(CHECK);
162
163 // At this point the class may not be fully initialized
164 // because of recursive initialization. If it is fully
165 // initialized & has_finalized is not set, we rewrite
166 // it into its fast version (Note: no locking is needed
167 // here since this is an atomic byte write and can be
168 // done more than once).
169 //
170 // Note: In case of classes with has_finalized we don't
171 // rewrite since that saves us an extra check in
172 // the fast version which then would call the
173 // slow version anyway (and do a call back into
174 // Java).
175 // If we have a breakpoint, then we don't rewrite
176 // because the _breakpoint bytecode would be lost.
177 oop obj = klass->allocate_instance(CHECK);
178 thread->set_vm_result(obj);
179 IRT_END
180
181
182 IRT_ENTRY(void, InterpreterRuntime::newarray(JavaThread* thread, BasicType type, jint size))
183 oop obj = oopFactory::new_typeArray(type, size, CHECK);
184 thread->set_vm_result(obj);
185 IRT_END
186
187
188 IRT_ENTRY(void, InterpreterRuntime::anewarray(JavaThread* thread, ConstantPool* pool, int index, jint size))
189 // Note: no oopHandle for pool & klass needed since they are not used
190 // anymore after new_objArray() and no GC can happen before.
191 // (This may have to change if this code changes!)
192 Klass* klass = pool->klass_at(index, CHECK);
193 objArrayOop obj = oopFactory::new_objArray(klass, size, CHECK);
194 thread->set_vm_result(obj);
195 IRT_END
196
197
198 IRT_ENTRY(void, InterpreterRuntime::multianewarray(JavaThread* thread, jint* first_size_address))
199 // We may want to pass in more arguments - could make this slightly faster
200 ConstantPool* constants = method(thread)->constants();
201 int i = get_index_u2(thread, Bytecodes::_multianewarray);
202 Klass* klass = constants->klass_at(i, CHECK);
203 int nof_dims = number_of_dimensions(thread);
204 assert(klass->is_klass(), "not a class");
205 assert(nof_dims >= 1, "multianewarray rank must be nonzero");
206
207 // We must create an array of jints to pass to multi_allocate.
208 ResourceMark rm(thread);
209 const int small_dims = 10;
210 jint dim_array[small_dims];
211 jint *dims = &dim_array[0];
212 if (nof_dims > small_dims) {
213 dims = (jint*) NEW_RESOURCE_ARRAY(jint, nof_dims);
214 }
215 for (int index = 0; index < nof_dims; index++) {
216 // offset from first_size_address is addressed as local[index]
217 int n = Interpreter::local_offset_in_bytes(index)/jintSize;
218 dims[index] = first_size_address[n];
219 }
220 oop obj = ArrayKlass::cast(klass)->multi_allocate(nof_dims, dims, CHECK);
221 thread->set_vm_result(obj);
222 IRT_END
223
224
225 IRT_ENTRY(void, InterpreterRuntime::register_finalizer(JavaThread* thread, oopDesc* obj))
226 assert(obj->is_oop(), "must be a valid oop");
227 assert(obj->klass()->has_finalizer(), "shouldn't be here otherwise");
228 InstanceKlass::register_finalizer(instanceOop(obj), CHECK);
229 IRT_END
230
231
232 // Quicken instance-of and check-cast bytecodes
233 IRT_ENTRY(void, InterpreterRuntime::quicken_io_cc(JavaThread* thread))
234 // Force resolving; quicken the bytecode
235 int which = get_index_u2(thread, Bytecodes::_checkcast);
236 ConstantPool* cpool = method(thread)->constants();
237 // We'd expect to assert that we're only here to quicken bytecodes, but in a multithreaded
238 // program we might have seen an unquick'd bytecode in the interpreter but have another
239 // thread quicken the bytecode before we get here.
240 // assert( cpool->tag_at(which).is_unresolved_klass(), "should only come here to quicken bytecodes" );
241 Klass* klass = cpool->klass_at(which, CHECK);
242 thread->set_vm_result_2(klass);
243 IRT_END
244
245
246 //------------------------------------------------------------------------------------------------------------------------
247 // Exceptions
248
249 void InterpreterRuntime::note_trap_inner(JavaThread* thread, int reason,
250 methodHandle trap_method, int trap_bci, TRAPS) {
251 if (trap_method.not_null()) {
252 MethodData* trap_mdo = trap_method->method_data();
253 if (trap_mdo == NULL) {
254 Method::build_interpreter_method_data(trap_method, THREAD);
255 if (HAS_PENDING_EXCEPTION) {
256 assert((PENDING_EXCEPTION->is_a(SystemDictionary::OutOfMemoryError_klass())),
257 "we expect only an OOM error here");
258 CLEAR_PENDING_EXCEPTION;
259 }
260 trap_mdo = trap_method->method_data();
261 // and fall through...
262 }
263 if (trap_mdo != NULL) {
264 // Update per-method count of trap events. The interpreter
265 // is updating the MDO to simulate the effect of compiler traps.
266 Deoptimization::update_method_data_from_interpreter(trap_mdo, trap_bci, reason);
267 }
268 }
269 }
270
271 // Assume the compiler is (or will be) interested in this event.
272 // If necessary, create an MDO to hold the information, and record it.
273 void InterpreterRuntime::note_trap(JavaThread* thread, int reason, TRAPS) {
274 assert(ProfileTraps, "call me only if profiling");
275 methodHandle trap_method(thread, method(thread));
276 int trap_bci = trap_method->bci_from(bcp(thread));
277 note_trap_inner(thread, reason, trap_method, trap_bci, THREAD);
278 }
279
280 #ifdef CC_INTERP
281 // As legacy note_trap, but we have more arguments.
282 IRT_ENTRY(void, InterpreterRuntime::note_trap(JavaThread* thread, int reason, Method *method, int trap_bci))
283 methodHandle trap_method(method);
284 note_trap_inner(thread, reason, trap_method, trap_bci, THREAD);
285 IRT_END
286
287 // Class Deoptimization is not visible in BytecodeInterpreter, so we need a wrapper
288 // for each exception.
289 void InterpreterRuntime::note_nullCheck_trap(JavaThread* thread, Method *method, int trap_bci)
290 { if (ProfileTraps) note_trap(thread, Deoptimization::Reason_null_check, method, trap_bci); }
291 void InterpreterRuntime::note_div0Check_trap(JavaThread* thread, Method *method, int trap_bci)
292 { if (ProfileTraps) note_trap(thread, Deoptimization::Reason_div0_check, method, trap_bci); }
293 void InterpreterRuntime::note_rangeCheck_trap(JavaThread* thread, Method *method, int trap_bci)
294 { if (ProfileTraps) note_trap(thread, Deoptimization::Reason_range_check, method, trap_bci); }
295 void InterpreterRuntime::note_classCheck_trap(JavaThread* thread, Method *method, int trap_bci)
296 { if (ProfileTraps) note_trap(thread, Deoptimization::Reason_class_check, method, trap_bci); }
297 void InterpreterRuntime::note_arrayCheck_trap(JavaThread* thread, Method *method, int trap_bci)
298 { if (ProfileTraps) note_trap(thread, Deoptimization::Reason_array_check, method, trap_bci); }
299 #endif // CC_INTERP
300
301
302 static Handle get_preinitialized_exception(Klass* k, TRAPS) {
303 // get klass
304 InstanceKlass* klass = InstanceKlass::cast(k);
305 assert(klass->is_initialized(),
306 "this klass should have been initialized during VM initialization");
307 // create instance - do not call constructor since we may have no
308 // (java) stack space left (should assert constructor is empty)
309 Handle exception;
310 oop exception_oop = klass->allocate_instance(CHECK_(exception));
311 exception = Handle(THREAD, exception_oop);
312 if (StackTraceInThrowable) {
313 java_lang_Throwable::fill_in_stack_trace(exception);
314 }
315 return exception;
316 }
317
318 // Special handling for stack overflow: since we don't have any (java) stack
319 // space left we use the pre-allocated & pre-initialized StackOverflowError
320 // klass to create an stack overflow error instance. We do not call its
321 // constructor for the same reason (it is empty, anyway).
322 IRT_ENTRY(void, InterpreterRuntime::throw_StackOverflowError(JavaThread* thread))
323 Handle exception = get_preinitialized_exception(
324 SystemDictionary::StackOverflowError_klass(),
325 CHECK);
326 // Increment counter for hs_err file reporting
327 Atomic::inc(&Exceptions::_stack_overflow_errors);
328 THROW_HANDLE(exception);
329 IRT_END
330
331
332 IRT_ENTRY(void, InterpreterRuntime::create_exception(JavaThread* thread, char* name, char* message))
333 // lookup exception klass
334 TempNewSymbol s = SymbolTable::new_symbol(name, CHECK);
335 if (ProfileTraps) {
336 if (s == vmSymbols::java_lang_ArithmeticException()) {
337 note_trap(thread, Deoptimization::Reason_div0_check, CHECK);
338 } else if (s == vmSymbols::java_lang_NullPointerException()) {
339 note_trap(thread, Deoptimization::Reason_null_check, CHECK);
340 }
341 }
342 // create exception
343 Handle exception = Exceptions::new_exception(thread, s, message);
344 thread->set_vm_result(exception());
345 IRT_END
346
347
348 IRT_ENTRY(void, InterpreterRuntime::create_klass_exception(JavaThread* thread, char* name, oopDesc* obj))
349 ResourceMark rm(thread);
350 const char* klass_name = obj->klass()->external_name();
351 // lookup exception klass
352 TempNewSymbol s = SymbolTable::new_symbol(name, CHECK);
353 if (ProfileTraps) {
354 note_trap(thread, Deoptimization::Reason_class_check, CHECK);
355 }
356 // create exception, with klass name as detail message
357 Handle exception = Exceptions::new_exception(thread, s, klass_name);
358 thread->set_vm_result(exception());
359 IRT_END
360
361
362 IRT_ENTRY(void, InterpreterRuntime::throw_ArrayIndexOutOfBoundsException(JavaThread* thread, char* name, jint index))
363 char message[jintAsStringSize];
364 // lookup exception klass
365 TempNewSymbol s = SymbolTable::new_symbol(name, CHECK);
366 if (ProfileTraps) {
367 note_trap(thread, Deoptimization::Reason_range_check, CHECK);
368 }
369 // create exception
370 sprintf(message, "%d", index);
371 THROW_MSG(s, message);
372 IRT_END
373
374 IRT_ENTRY(void, InterpreterRuntime::throw_ClassCastException(
375 JavaThread* thread, oopDesc* obj))
376
377 ResourceMark rm(thread);
378 char* message = SharedRuntime::generate_class_cast_message(
379 thread, obj->klass()->external_name());
380
381 if (ProfileTraps) {
382 note_trap(thread, Deoptimization::Reason_class_check, CHECK);
383 }
384
385 // create exception
386 THROW_MSG(vmSymbols::java_lang_ClassCastException(), message);
387 IRT_END
388
389 // exception_handler_for_exception(...) returns the continuation address,
390 // the exception oop (via TLS) and sets the bci/bcp for the continuation.
391 // The exception oop is returned to make sure it is preserved over GC (it
392 // is only on the stack if the exception was thrown explicitly via athrow).
393 // During this operation, the expression stack contains the values for the
394 // bci where the exception happened. If the exception was propagated back
395 // from a call, the expression stack contains the values for the bci at the
396 // invoke w/o arguments (i.e., as if one were inside the call).
397 IRT_ENTRY(address, InterpreterRuntime::exception_handler_for_exception(JavaThread* thread, oopDesc* exception))
398
399 Handle h_exception(thread, exception);
400 methodHandle h_method (thread, method(thread));
401 constantPoolHandle h_constants(thread, h_method->constants());
402 bool should_repeat;
403 int handler_bci;
404 int current_bci = bci(thread);
405
406 if (thread->frames_to_pop_failed_realloc() > 0) {
407 // Allocation of scalar replaced object used in this frame
408 // failed. Unconditionally pop the frame.
409 thread->dec_frames_to_pop_failed_realloc();
410 thread->set_vm_result(h_exception());
411 // If the method is synchronized we already unlocked the monitor
412 // during deoptimization so the interpreter needs to skip it when
413 // the frame is popped.
414 thread->set_do_not_unlock_if_synchronized(true);
415 #ifdef CC_INTERP
416 return (address) -1;
417 #else
418 return Interpreter::remove_activation_entry();
419 #endif
420 }
421
422 // Need to do this check first since when _do_not_unlock_if_synchronized
423 // is set, we don't want to trigger any classloading which may make calls
424 // into java, or surprisingly find a matching exception handler for bci 0
425 // since at this moment the method hasn't been "officially" entered yet.
426 if (thread->do_not_unlock_if_synchronized()) {
427 ResourceMark rm;
428 assert(current_bci == 0, "bci isn't zero for do_not_unlock_if_synchronized");
429 thread->set_vm_result(exception);
430 #ifdef CC_INTERP
431 return (address) -1;
432 #else
433 return Interpreter::remove_activation_entry();
434 #endif
435 }
436
437 do {
438 should_repeat = false;
439
440 // assertions
441 #ifdef ASSERT
442 assert(h_exception.not_null(), "NULL exceptions should be handled by athrow");
443 assert(h_exception->is_oop(), "just checking");
444 // Check that exception is a subclass of Throwable, otherwise we have a VerifyError
445 if (!(h_exception->is_a(SystemDictionary::Throwable_klass()))) {
446 if (ExitVMOnVerifyError) vm_exit(-1);
447 ShouldNotReachHere();
448 }
449 #endif
450
451 // tracing
452 if (TraceExceptions) {
453 ResourceMark rm(thread);
454 Symbol* message = java_lang_Throwable::detail_message(h_exception());
455 ttyLocker ttyl; // Lock after getting the detail message
456 if (message != NULL) {
457 tty->print_cr("Exception <%s: %s> (" INTPTR_FORMAT ")",
458 h_exception->print_value_string(), message->as_C_string(),
459 (address)h_exception());
460 } else {
461 tty->print_cr("Exception <%s> (" INTPTR_FORMAT ")",
462 h_exception->print_value_string(),
463 (address)h_exception());
464 }
465 tty->print_cr(" thrown in interpreter method <%s>", h_method->print_value_string());
466 tty->print_cr(" at bci %d for thread " INTPTR_FORMAT, current_bci, thread);
467 }
468 // Don't go paging in something which won't be used.
469 // else if (extable->length() == 0) {
470 // // disabled for now - interpreter is not using shortcut yet
471 // // (shortcut is not to call runtime if we have no exception handlers)
472 // // warning("performance bug: should not call runtime if method has no exception handlers");
473 // }
474 // for AbortVMOnException flag
475 NOT_PRODUCT(Exceptions::debug_check_abort(h_exception));
476
477 // exception handler lookup
478 KlassHandle h_klass(THREAD, h_exception->klass());
479 handler_bci = Method::fast_exception_handler_bci_for(h_method, h_klass, current_bci, THREAD);
480 if (HAS_PENDING_EXCEPTION) {
481 // We threw an exception while trying to find the exception handler.
482 // Transfer the new exception to the exception handle which will
483 // be set into thread local storage, and do another lookup for an
484 // exception handler for this exception, this time starting at the
485 // BCI of the exception handler which caused the exception to be
486 // thrown (bug 4307310).
487 h_exception = Handle(THREAD, PENDING_EXCEPTION);
488 CLEAR_PENDING_EXCEPTION;
489 if (handler_bci >= 0) {
490 current_bci = handler_bci;
491 should_repeat = true;
492 }
493 }
494 } while (should_repeat == true);
495
496 // notify JVMTI of an exception throw; JVMTI will detect if this is a first
497 // time throw or a stack unwinding throw and accordingly notify the debugger
498 if (JvmtiExport::can_post_on_exceptions()) {
499 JvmtiExport::post_exception_throw(thread, h_method(), bcp(thread), h_exception());
500 }
501
502 #ifdef CC_INTERP
503 address continuation = (address)(intptr_t) handler_bci;
504 #else
505 address continuation = NULL;
506 #endif
507 address handler_pc = NULL;
508 if (handler_bci < 0 || !thread->reguard_stack((address) &continuation)) {
509 // Forward exception to callee (leaving bci/bcp untouched) because (a) no
510 // handler in this method, or (b) after a stack overflow there is not yet
511 // enough stack space available to reprotect the stack.
512 #ifndef CC_INTERP
513 continuation = Interpreter::remove_activation_entry();
514 #endif
515 // Count this for compilation purposes
516 h_method->interpreter_throwout_increment(THREAD);
517 } else {
518 // handler in this method => change bci/bcp to handler bci/bcp and continue there
519 handler_pc = h_method->code_base() + handler_bci;
520 #ifndef CC_INTERP
521 set_bcp_and_mdp(handler_pc, thread);
522 continuation = Interpreter::dispatch_table(vtos)[*handler_pc];
523 #endif
524 }
525 // notify debugger of an exception catch
526 // (this is good for exceptions caught in native methods as well)
527 if (JvmtiExport::can_post_on_exceptions()) {
528 JvmtiExport::notice_unwind_due_to_exception(thread, h_method(), handler_pc, h_exception(), (handler_pc != NULL));
529 }
530
531 thread->set_vm_result(h_exception());
532 return continuation;
533 IRT_END
534
535
536 IRT_ENTRY(void, InterpreterRuntime::throw_pending_exception(JavaThread* thread))
537 assert(thread->has_pending_exception(), "must only ne called if there's an exception pending");
538 // nothing to do - eventually we should remove this code entirely (see comments @ call sites)
539 IRT_END
540
541
542 IRT_ENTRY(void, InterpreterRuntime::throw_AbstractMethodError(JavaThread* thread))
543 THROW(vmSymbols::java_lang_AbstractMethodError());
544 IRT_END
545
546
547 IRT_ENTRY(void, InterpreterRuntime::throw_IncompatibleClassChangeError(JavaThread* thread))
548 THROW(vmSymbols::java_lang_IncompatibleClassChangeError());
549 IRT_END
550
551
552 //------------------------------------------------------------------------------------------------------------------------
553 // Fields
554 //
555
556 IRT_ENTRY(void, InterpreterRuntime::resolve_get_put(JavaThread* thread, Bytecodes::Code bytecode))
557 // resolve field
558 fieldDescriptor info;
559 constantPoolHandle pool(thread, method(thread)->constants());
560 bool is_put = (bytecode == Bytecodes::_putfield || bytecode == Bytecodes::_putstatic);
561 bool is_static = (bytecode == Bytecodes::_getstatic || bytecode == Bytecodes::_putstatic);
562
563 {
564 JvmtiHideSingleStepping jhss(thread);
565 LinkResolver::resolve_field_access(info, pool, get_index_u2_cpcache(thread, bytecode),
566 bytecode, CHECK);
567 } // end JvmtiHideSingleStepping
568
569 // check if link resolution caused cpCache to be updated
570 if (already_resolved(thread)) return;
571
572 // compute auxiliary field attributes
573 TosState state = as_TosState(info.field_type());
574
575 // We need to delay resolving put instructions on final fields
576 // until we actually invoke one. This is required so we throw
577 // exceptions at the correct place. If we do not resolve completely
578 // in the current pass, leaving the put_code set to zero will
579 // cause the next put instruction to reresolve.
580 Bytecodes::Code put_code = (Bytecodes::Code)0;
581
582 // We also need to delay resolving getstatic instructions until the
583 // class is intitialized. This is required so that access to the static
584 // field will call the initialization function every time until the class
585 // is completely initialized ala. in 2.17.5 in JVM Specification.
586 InstanceKlass* klass = InstanceKlass::cast(info.field_holder());
587 bool uninitialized_static = ((bytecode == Bytecodes::_getstatic || bytecode == Bytecodes::_putstatic) &&
588 !klass->is_initialized());
589 Bytecodes::Code get_code = (Bytecodes::Code)0;
590
591 if (!uninitialized_static) {
592 get_code = ((is_static) ? Bytecodes::_getstatic : Bytecodes::_getfield);
593 if (is_put || !info.access_flags().is_final()) {
594 put_code = ((is_static) ? Bytecodes::_putstatic : Bytecodes::_putfield);
595 }
596 }
597
598 cache_entry(thread)->set_field(
599 get_code,
600 put_code,
601 info.field_holder(),
602 info.index(),
603 info.offset(),
604 state,
605 info.access_flags().is_final(),
606 info.access_flags().is_volatile(),
607 pool->pool_holder()
608 );
609 IRT_END
610
611
612 //------------------------------------------------------------------------------------------------------------------------
613 // Synchronization
614 //
615 // The interpreter's synchronization code is factored out so that it can
616 // be shared by method invocation and synchronized blocks.
617 //%note synchronization_3
618
619 //%note monitor_1
620 IRT_ENTRY_NO_ASYNC(void, InterpreterRuntime::monitorenter(JavaThread* thread, BasicObjectLock* elem))
621 #ifdef ASSERT
622 thread->last_frame().interpreter_frame_verify_monitor(elem);
623 #endif
624 if (PrintBiasedLockingStatistics) {
625 Atomic::inc(BiasedLocking::slow_path_entry_count_addr());
626 }
627 Handle h_obj(thread, elem->obj());
628 assert(Universe::heap()->is_in_reserved_or_null(h_obj()),
629 "must be NULL or an object");
630 if (UseBiasedLocking) {
631 // Retry fast entry if bias is revoked to avoid unnecessary inflation
632 ObjectSynchronizer::fast_enter(h_obj, elem->lock(), true, CHECK);
633 } else {
634 ObjectSynchronizer::slow_enter(h_obj, elem->lock(), CHECK);
635 }
636 assert(Universe::heap()->is_in_reserved_or_null(elem->obj()),
637 "must be NULL or an object");
638 #ifdef ASSERT
639 thread->last_frame().interpreter_frame_verify_monitor(elem);
640 #endif
641 IRT_END
642
643
644 //%note monitor_1
645 IRT_ENTRY_NO_ASYNC(void, InterpreterRuntime::monitorexit(JavaThread* thread, BasicObjectLock* elem))
646 #ifdef ASSERT
647 thread->last_frame().interpreter_frame_verify_monitor(elem);
648 #endif
649 Handle h_obj(thread, elem->obj());
650 assert(Universe::heap()->is_in_reserved_or_null(h_obj()),
651 "must be NULL or an object");
652 if (elem == NULL || h_obj()->is_unlocked()) {
653 THROW(vmSymbols::java_lang_IllegalMonitorStateException());
654 }
655 ObjectSynchronizer::slow_exit(h_obj(), elem->lock(), thread);
656 // Free entry. This must be done here, since a pending exception might be installed on
657 // exit. If it is not cleared, the exception handling code will try to unlock the monitor again.
658 elem->set_obj(NULL);
659 #ifdef ASSERT
660 thread->last_frame().interpreter_frame_verify_monitor(elem);
661 #endif
662 IRT_END
663
664
665 IRT_ENTRY(void, InterpreterRuntime::throw_illegal_monitor_state_exception(JavaThread* thread))
666 THROW(vmSymbols::java_lang_IllegalMonitorStateException());
667 IRT_END
668
669
670 IRT_ENTRY(void, InterpreterRuntime::new_illegal_monitor_state_exception(JavaThread* thread))
671 // Returns an illegal exception to install into the current thread. The
672 // pending_exception flag is cleared so normal exception handling does not
673 // trigger. Any current installed exception will be overwritten. This
674 // method will be called during an exception unwind.
675
676 assert(!HAS_PENDING_EXCEPTION, "no pending exception");
677 Handle exception(thread, thread->vm_result());
678 assert(exception() != NULL, "vm result should be set");
679 thread->set_vm_result(NULL); // clear vm result before continuing (may cause memory leaks and assert failures)
680 if (!exception->is_a(SystemDictionary::ThreadDeath_klass())) {
681 exception = get_preinitialized_exception(
682 SystemDictionary::IllegalMonitorStateException_klass(),
683 CATCH);
684 }
685 thread->set_vm_result(exception());
686 IRT_END
687
688
689 //------------------------------------------------------------------------------------------------------------------------
690 // Invokes
691
692 IRT_ENTRY(Bytecodes::Code, InterpreterRuntime::get_original_bytecode_at(JavaThread* thread, Method* method, address bcp))
693 return method->orig_bytecode_at(method->bci_from(bcp));
694 IRT_END
695
696 IRT_ENTRY(void, InterpreterRuntime::set_original_bytecode_at(JavaThread* thread, Method* method, address bcp, Bytecodes::Code new_code))
697 method->set_orig_bytecode_at(method->bci_from(bcp), new_code);
698 IRT_END
699
700 IRT_ENTRY(void, InterpreterRuntime::_breakpoint(JavaThread* thread, Method* method, address bcp))
701 JvmtiExport::post_raw_breakpoint(thread, method, bcp);
702 IRT_END
703
704 IRT_ENTRY(void, InterpreterRuntime::resolve_invoke(JavaThread* thread, Bytecodes::Code bytecode)) {
705 // extract receiver from the outgoing argument list if necessary
706 Handle receiver(thread, NULL);
707 if (bytecode == Bytecodes::_invokevirtual || bytecode == Bytecodes::_invokeinterface ||
708 bytecode == Bytecodes::_invokespecial) {
709 ResourceMark rm(thread);
710 methodHandle m (thread, method(thread));
711 Bytecode_invoke call(m, bci(thread));
712 Symbol* signature = call.signature();
713 receiver = Handle(thread,
714 thread->last_frame().interpreter_callee_receiver(signature));
715 assert(Universe::heap()->is_in_reserved_or_null(receiver()),
716 "sanity check");
717 assert(receiver.is_null() ||
718 !Universe::heap()->is_in_reserved(receiver->klass()),
719 "sanity check");
720 }
721
722 // resolve method
723 CallInfo info;
724 constantPoolHandle pool(thread, method(thread)->constants());
725
726 {
727 JvmtiHideSingleStepping jhss(thread);
728 LinkResolver::resolve_invoke(info, receiver, pool,
729 get_index_u2_cpcache(thread, bytecode), bytecode, CHECK);
730 if (JvmtiExport::can_hotswap_or_post_breakpoint()) {
731 int retry_count = 0;
732 while (info.resolved_method()->is_old()) {
733 // It is very unlikely that method is redefined more than 100 times
734 // in the middle of resolve. If it is looping here more than 100 times
735 // means then there could be a bug here.
736 guarantee((retry_count++ < 100),
737 "Could not resolve to latest version of redefined method");
738 // method is redefined in the middle of resolve so re-try.
739 LinkResolver::resolve_invoke(info, receiver, pool,
740 get_index_u2_cpcache(thread, bytecode), bytecode, CHECK);
741 }
742 }
743 } // end JvmtiHideSingleStepping
744
745 // check if link resolution caused cpCache to be updated
746 if (already_resolved(thread)) return;
747
748 if (bytecode == Bytecodes::_invokeinterface) {
749 if (TraceItables && Verbose) {
750 ResourceMark rm(thread);
751 tty->print_cr("Resolving: klass: %s to method: %s", info.resolved_klass()->name()->as_C_string(), info.resolved_method()->name()->as_C_string());
752 }
753 }
754 #ifdef ASSERT
755 if (bytecode == Bytecodes::_invokeinterface) {
756 if (info.resolved_method()->method_holder() ==
757 SystemDictionary::Object_klass()) {
758 // NOTE: THIS IS A FIX FOR A CORNER CASE in the JVM spec
759 // (see also CallInfo::set_interface for details)
760 assert(info.call_kind() == CallInfo::vtable_call ||
761 info.call_kind() == CallInfo::direct_call, "");
762 methodHandle rm = info.resolved_method();
763 assert(rm->is_final() || info.has_vtable_index(),
764 "should have been set already");
765 } else if (!info.resolved_method()->has_itable_index()) {
766 // Resolved something like CharSequence.toString. Use vtable not itable.
767 assert(info.call_kind() != CallInfo::itable_call, "");
768 } else {
769 // Setup itable entry
770 assert(info.call_kind() == CallInfo::itable_call, "");
771 int index = info.resolved_method()->itable_index();
772 assert(info.itable_index() == index, "");
773 }
774 } else if (bytecode == Bytecodes::_invokespecial) {
775 assert(info.call_kind() == CallInfo::direct_call, "must be direct call");
776 } else {
777 assert(info.call_kind() == CallInfo::direct_call ||
778 info.call_kind() == CallInfo::vtable_call, "");
779 }
780 #endif
781 // Get sender or sender's host_klass, and only set cpCache entry to resolved if
782 // it is not an interface. The receiver for invokespecial calls within interface
783 // methods must be checked for every call.
784 InstanceKlass* sender = pool->pool_holder();
785 sender = sender->has_host_klass() ? InstanceKlass::cast(sender->host_klass()) : sender;
786
787 switch (info.call_kind()) {
788 case CallInfo::direct_call:
789 cache_entry(thread)->set_direct_call(
790 bytecode,
791 info.resolved_method(),
792 sender->is_interface());
793 break;
794 case CallInfo::vtable_call:
795 cache_entry(thread)->set_vtable_call(
796 bytecode,
797 info.resolved_method(),
798 info.vtable_index());
799 break;
800 case CallInfo::itable_call:
801 cache_entry(thread)->set_itable_call(
802 bytecode,
803 info.resolved_klass(),
804 info.resolved_method(),
805 info.itable_index());
806 break;
807 default: ShouldNotReachHere();
808 }
809 }
810 IRT_END
811
812
813 // First time execution: Resolve symbols, create a permanent MethodType object.
814 IRT_ENTRY(void, InterpreterRuntime::resolve_invokehandle(JavaThread* thread)) {
815 assert(EnableInvokeDynamic, "");
816 const Bytecodes::Code bytecode = Bytecodes::_invokehandle;
817
818 // resolve method
819 CallInfo info;
820 constantPoolHandle pool(thread, method(thread)->constants());
821
822 {
823 JvmtiHideSingleStepping jhss(thread);
824 LinkResolver::resolve_invoke(info, Handle(), pool,
825 get_index_u2_cpcache(thread, bytecode), bytecode, CHECK);
826 } // end JvmtiHideSingleStepping
827
828 cache_entry(thread)->set_method_handle(pool, info);
829 }
830 IRT_END
831
832
833 // First time execution: Resolve symbols, create a permanent CallSite object.
834 IRT_ENTRY(void, InterpreterRuntime::resolve_invokedynamic(JavaThread* thread)) {
835 assert(EnableInvokeDynamic, "");
836 const Bytecodes::Code bytecode = Bytecodes::_invokedynamic;
837
838 //TO DO: consider passing BCI to Java.
839 // int caller_bci = method(thread)->bci_from(bcp(thread));
840
841 // resolve method
842 CallInfo info;
843 constantPoolHandle pool(thread, method(thread)->constants());
844 int index = get_index_u4(thread, bytecode);
845 {
846 JvmtiHideSingleStepping jhss(thread);
847 LinkResolver::resolve_invoke(info, Handle(), pool,
848 index, bytecode, CHECK);
849 } // end JvmtiHideSingleStepping
850
851 ConstantPoolCacheEntry* cp_cache_entry = pool->invokedynamic_cp_cache_entry_at(index);
852 cp_cache_entry->set_dynamic_call(pool, info);
853 }
854 IRT_END
855
856
857 //------------------------------------------------------------------------------------------------------------------------
858 // Miscellaneous
859
860
861 nmethod* InterpreterRuntime::frequency_counter_overflow(JavaThread* thread, address branch_bcp) {
862 nmethod* nm = frequency_counter_overflow_inner(thread, branch_bcp);
863 assert(branch_bcp != NULL || nm == NULL, "always returns null for non OSR requests");
864 if (branch_bcp != NULL && nm != NULL) {
865 // This was a successful request for an OSR nmethod. Because
866 // frequency_counter_overflow_inner ends with a safepoint check,
867 // nm could have been unloaded so look it up again. It's unsafe
868 // to examine nm directly since it might have been freed and used
869 // for something else.
870 frame fr = thread->last_frame();
871 Method* method = fr.interpreter_frame_method();
872 int bci = method->bci_from(fr.interpreter_frame_bcp());
873 nm = method->lookup_osr_nmethod_for(bci, CompLevel_none, false);
874 }
875 #ifndef PRODUCT
876 if (TraceOnStackReplacement) {
877 if (nm != NULL) {
878 tty->print("OSR entry @ pc: " INTPTR_FORMAT ": ", nm->osr_entry());
879 nm->print();
880 }
881 }
882 #endif
883 return nm;
884 }
885
886 IRT_ENTRY(nmethod*,
887 InterpreterRuntime::frequency_counter_overflow_inner(JavaThread* thread, address branch_bcp))
888 // use UnlockFlagSaver to clear and restore the _do_not_unlock_if_synchronized
889 // flag, in case this method triggers classloading which will call into Java.
890 UnlockFlagSaver fs(thread);
891
892 frame fr = thread->last_frame();
893 assert(fr.is_interpreted_frame(), "must come from interpreter");
894 methodHandle method(thread, fr.interpreter_frame_method());
895 const int branch_bci = branch_bcp != NULL ? method->bci_from(branch_bcp) : InvocationEntryBci;
896 const int bci = branch_bcp != NULL ? method->bci_from(fr.interpreter_frame_bcp()) : InvocationEntryBci;
897
898 assert(!HAS_PENDING_EXCEPTION, "Should not have any exceptions pending");
899 nmethod* osr_nm = CompilationPolicy::policy()->event(method, method, branch_bci, bci, CompLevel_none, NULL, thread);
900 assert(!HAS_PENDING_EXCEPTION, "Event handler should not throw any exceptions");
901
902 if (osr_nm != NULL) {
903 // We may need to do on-stack replacement which requires that no
904 // monitors in the activation are biased because their
905 // BasicObjectLocks will need to migrate during OSR. Force
906 // unbiasing of all monitors in the activation now (even though
907 // the OSR nmethod might be invalidated) because we don't have a
908 // safepoint opportunity later once the migration begins.
909 if (UseBiasedLocking) {
910 ResourceMark rm;
911 GrowableArray<Handle>* objects_to_revoke = new GrowableArray<Handle>();
912 for( BasicObjectLock *kptr = fr.interpreter_frame_monitor_end();
913 kptr < fr.interpreter_frame_monitor_begin();
914 kptr = fr.next_monitor_in_interpreter_frame(kptr) ) {
915 if( kptr->obj() != NULL ) {
916 objects_to_revoke->append(Handle(THREAD, kptr->obj()));
917 }
918 }
919 BiasedLocking::revoke(objects_to_revoke);
920 }
921 }
922 return osr_nm;
923 IRT_END
924
925 IRT_LEAF(jint, InterpreterRuntime::bcp_to_di(Method* method, address cur_bcp))
926 assert(ProfileInterpreter, "must be profiling interpreter");
927 int bci = method->bci_from(cur_bcp);
928 MethodData* mdo = method->method_data();
929 if (mdo == NULL) return 0;
930 return mdo->bci_to_di(bci);
931 IRT_END
932
933 IRT_ENTRY(void, InterpreterRuntime::profile_method(JavaThread* thread))
934 // use UnlockFlagSaver to clear and restore the _do_not_unlock_if_synchronized
935 // flag, in case this method triggers classloading which will call into Java.
936 UnlockFlagSaver fs(thread);
937
938 assert(ProfileInterpreter, "must be profiling interpreter");
939 frame fr = thread->last_frame();
940 assert(fr.is_interpreted_frame(), "must come from interpreter");
941 methodHandle method(thread, fr.interpreter_frame_method());
942 Method::build_interpreter_method_data(method, THREAD);
943 if (HAS_PENDING_EXCEPTION) {
944 assert((PENDING_EXCEPTION->is_a(SystemDictionary::OutOfMemoryError_klass())), "we expect only an OOM error here");
945 CLEAR_PENDING_EXCEPTION;
946 // and fall through...
947 }
948 IRT_END
949
950
951 #ifdef ASSERT
952 IRT_LEAF(void, InterpreterRuntime::verify_mdp(Method* method, address bcp, address mdp))
953 assert(ProfileInterpreter, "must be profiling interpreter");
954
955 MethodData* mdo = method->method_data();
956 assert(mdo != NULL, "must not be null");
957
958 int bci = method->bci_from(bcp);
959
960 address mdp2 = mdo->bci_to_dp(bci);
961 if (mdp != mdp2) {
962 ResourceMark rm;
963 ResetNoHandleMark rnm; // In a LEAF entry.
964 HandleMark hm;
965 tty->print_cr("FAILED verify : actual mdp %p expected mdp %p @ bci %d", mdp, mdp2, bci);
966 int current_di = mdo->dp_to_di(mdp);
967 int expected_di = mdo->dp_to_di(mdp2);
968 tty->print_cr(" actual di %d expected di %d", current_di, expected_di);
969 int expected_approx_bci = mdo->data_at(expected_di)->bci();
970 int approx_bci = -1;
971 if (current_di >= 0) {
972 approx_bci = mdo->data_at(current_di)->bci();
973 }
974 tty->print_cr(" actual bci is %d expected bci %d", approx_bci, expected_approx_bci);
975 mdo->print_on(tty);
976 method->print_codes();
977 }
978 assert(mdp == mdp2, "wrong mdp");
979 IRT_END
980 #endif // ASSERT
981
982 IRT_ENTRY(void, InterpreterRuntime::update_mdp_for_ret(JavaThread* thread, int return_bci))
983 assert(ProfileInterpreter, "must be profiling interpreter");
984 ResourceMark rm(thread);
985 HandleMark hm(thread);
986 frame fr = thread->last_frame();
987 assert(fr.is_interpreted_frame(), "must come from interpreter");
988 MethodData* h_mdo = fr.interpreter_frame_method()->method_data();
989
990 // Grab a lock to ensure atomic access to setting the return bci and
991 // the displacement. This can block and GC, invalidating all naked oops.
992 MutexLocker ml(RetData_lock);
993
994 // ProfileData is essentially a wrapper around a derived oop, so we
995 // need to take the lock before making any ProfileData structures.
996 ProfileData* data = h_mdo->data_at(h_mdo->dp_to_di(fr.interpreter_frame_mdp()));
997 guarantee(data != NULL, "profile data must be valid");
998 RetData* rdata = data->as_RetData();
999 address new_mdp = rdata->fixup_ret(return_bci, h_mdo);
1000 fr.interpreter_frame_set_mdp(new_mdp);
1001 IRT_END
1002
1003 IRT_ENTRY(MethodCounters*, InterpreterRuntime::build_method_counters(JavaThread* thread, Method* m))
1004 MethodCounters* mcs = Method::build_method_counters(m, thread);
1005 if (HAS_PENDING_EXCEPTION) {
1006 assert((PENDING_EXCEPTION->is_a(SystemDictionary::OutOfMemoryError_klass())), "we expect only an OOM error here");
1007 CLEAR_PENDING_EXCEPTION;
1008 }
1009 return mcs;
1010 IRT_END
1011
1012
1013 IRT_ENTRY(void, InterpreterRuntime::at_safepoint(JavaThread* thread))
1014 // We used to need an explict preserve_arguments here for invoke bytecodes. However,
1015 // stack traversal automatically takes care of preserving arguments for invoke, so
1016 // this is no longer needed.
1017
1018 // IRT_END does an implicit safepoint check, hence we are guaranteed to block
1019 // if this is called during a safepoint
1020
1021 if (JvmtiExport::should_post_single_step()) {
1022 // We are called during regular safepoints and when the VM is
1023 // single stepping. If any thread is marked for single stepping,
1024 // then we may have JVMTI work to do.
1025 JvmtiExport::at_single_stepping_point(thread, method(thread), bcp(thread));
1026 }
1027 IRT_END
1028
1029 IRT_ENTRY(void, InterpreterRuntime::post_field_access(JavaThread *thread, oopDesc* obj,
1030 ConstantPoolCacheEntry *cp_entry))
1031
1032 // check the access_flags for the field in the klass
1033
1034 InstanceKlass* ik = InstanceKlass::cast(cp_entry->f1_as_klass());
1035 int index = cp_entry->field_index();
1036 if ((ik->field_access_flags(index) & JVM_ACC_FIELD_ACCESS_WATCHED) == 0) return;
1037
1038 switch(cp_entry->flag_state()) {
1039 case btos: // fall through
1040 case ztos: // fall through
1041 case ctos: // fall through
1042 case stos: // fall through
1043 case itos: // fall through
1044 case ftos: // fall through
1045 case ltos: // fall through
1046 case dtos: // fall through
1047 case atos: break;
1048 default: ShouldNotReachHere(); return;
1049 }
1050 bool is_static = (obj == NULL);
1051 HandleMark hm(thread);
1052
1053 Handle h_obj;
1054 if (!is_static) {
1055 // non-static field accessors have an object, but we need a handle
1056 h_obj = Handle(thread, obj);
1057 }
1058 instanceKlassHandle h_cp_entry_f1(thread, (Klass*)cp_entry->f1_as_klass());
1059 jfieldID fid = jfieldIDWorkaround::to_jfieldID(h_cp_entry_f1, cp_entry->f2_as_index(), is_static);
1060 JvmtiExport::post_field_access(thread, method(thread), bcp(thread), h_cp_entry_f1, h_obj, fid);
1061 IRT_END
1062
1063 IRT_ENTRY(void, InterpreterRuntime::post_field_modification(JavaThread *thread,
1064 oopDesc* obj, ConstantPoolCacheEntry *cp_entry, jvalue *value))
1065
1066 Klass* k = (Klass*)cp_entry->f1_as_klass();
1067
1068 // check the access_flags for the field in the klass
1069 InstanceKlass* ik = InstanceKlass::cast(k);
1070 int index = cp_entry->field_index();
1071 // bail out if field modifications are not watched
1072 if ((ik->field_access_flags(index) & JVM_ACC_FIELD_MODIFICATION_WATCHED) == 0) return;
1073
1074 char sig_type = '\0';
1075
1076 switch(cp_entry->flag_state()) {
1077 case btos: sig_type = 'B'; break;
1078 case ztos: sig_type = 'Z'; break;
1079 case ctos: sig_type = 'C'; break;
1080 case stos: sig_type = 'S'; break;
1081 case itos: sig_type = 'I'; break;
1082 case ftos: sig_type = 'F'; break;
1083 case atos: sig_type = 'L'; break;
1084 case ltos: sig_type = 'J'; break;
1085 case dtos: sig_type = 'D'; break;
1086 default: ShouldNotReachHere(); return;
1087 }
1088 bool is_static = (obj == NULL);
1089
1090 HandleMark hm(thread);
1091 instanceKlassHandle h_klass(thread, k);
1092 jfieldID fid = jfieldIDWorkaround::to_jfieldID(h_klass, cp_entry->f2_as_index(), is_static);
1093 jvalue fvalue;
1094 #ifdef _LP64
1095 fvalue = *value;
1096 #else
1097 // Long/double values are stored unaligned and also noncontiguously with
1098 // tagged stacks. We can't just do a simple assignment even in the non-
1099 // J/D cases because a C++ compiler is allowed to assume that a jvalue is
1100 // 8-byte aligned, and interpreter stack slots are only 4-byte aligned.
1101 // We assume that the two halves of longs/doubles are stored in interpreter
1102 // stack slots in platform-endian order.
1103 jlong_accessor u;
1104 jint* newval = (jint*)value;
1105 u.words[0] = newval[0];
1106 u.words[1] = newval[Interpreter::stackElementWords]; // skip if tag
1107 fvalue.j = u.long_value;
1108 #endif // _LP64
1109
1110 Handle h_obj;
1111 if (!is_static) {
1112 // non-static field accessors have an object, but we need a handle
1113 h_obj = Handle(thread, obj);
1114 }
1115
1116 JvmtiExport::post_raw_field_modification(thread, method(thread), bcp(thread), h_klass, h_obj,
1117 fid, sig_type, &fvalue);
1118 IRT_END
1119
1120 IRT_ENTRY(void, InterpreterRuntime::post_method_entry(JavaThread *thread))
1121 JvmtiExport::post_method_entry(thread, InterpreterRuntime::method(thread), InterpreterRuntime::last_frame(thread));
1122 IRT_END
1123
1124
1125 IRT_ENTRY(void, InterpreterRuntime::post_method_exit(JavaThread *thread))
1126 JvmtiExport::post_method_exit(thread, InterpreterRuntime::method(thread), InterpreterRuntime::last_frame(thread));
1127 IRT_END
1128
1129 IRT_LEAF(int, InterpreterRuntime::interpreter_contains(address pc))
1130 {
1131 return (Interpreter::contains(pc) ? 1 : 0);
1132 }
1133 IRT_END
1134
1135
1136 // Implementation of SignatureHandlerLibrary
1137
1138 address SignatureHandlerLibrary::set_handler_blob() {
1139 BufferBlob* handler_blob = BufferBlob::create("native signature handlers", blob_size);
1140 if (handler_blob == NULL) {
1141 return NULL;
1142 }
1143 address handler = handler_blob->code_begin();
1144 _handler_blob = handler_blob;
1145 _handler = handler;
1146 return handler;
1147 }
1148
1149 void SignatureHandlerLibrary::initialize() {
1150 if (_fingerprints != NULL) {
1151 return;
1152 }
1153 if (set_handler_blob() == NULL) {
1154 vm_exit_out_of_memory(blob_size, OOM_MALLOC_ERROR, "native signature handlers");
1155 }
1156
1157 BufferBlob* bb = BufferBlob::create("Signature Handler Temp Buffer",
1158 SignatureHandlerLibrary::buffer_size);
1159 _buffer = bb->code_begin();
1160
1161 _fingerprints = new(ResourceObj::C_HEAP, mtCode)GrowableArray<uint64_t>(32, true);
1162 _handlers = new(ResourceObj::C_HEAP, mtCode)GrowableArray<address>(32, true);
1163 }
1164
1165 address SignatureHandlerLibrary::set_handler(CodeBuffer* buffer) {
1166 address handler = _handler;
1167 int insts_size = buffer->pure_insts_size();
1168 if (handler + insts_size > _handler_blob->code_end()) {
1169 // get a new handler blob
1170 handler = set_handler_blob();
1171 }
1172 if (handler != NULL) {
1173 memcpy(handler, buffer->insts_begin(), insts_size);
1174 pd_set_handler(handler);
1175 ICache::invalidate_range(handler, insts_size);
1176 _handler = handler + insts_size;
1177 }
1178 return handler;
1179 }
1180
1181 void SignatureHandlerLibrary::add(methodHandle method) {
1182 if (method->signature_handler() == NULL) {
1183 // use slow signature handler if we can't do better
1184 int handler_index = -1;
1185 // check if we can use customized (fast) signature handler
1186 if (UseFastSignatureHandlers && method->size_of_parameters() <= Fingerprinter::max_size_of_parameters) {
1187 // use customized signature handler
1188 MutexLocker mu(SignatureHandlerLibrary_lock);
1189 // make sure data structure is initialized
1190 initialize();
1191 // lookup method signature's fingerprint
1192 uint64_t fingerprint = Fingerprinter(method).fingerprint();
1193 handler_index = _fingerprints->find(fingerprint);
1194 // create handler if necessary
1195 if (handler_index < 0) {
1196 ResourceMark rm;
1197 ptrdiff_t align_offset = (address)
1198 round_to((intptr_t)_buffer, CodeEntryAlignment) - (address)_buffer;
1199 CodeBuffer buffer((address)(_buffer + align_offset),
1200 SignatureHandlerLibrary::buffer_size - align_offset);
1201 InterpreterRuntime::SignatureHandlerGenerator(method, &buffer).generate(fingerprint);
1202 // copy into code heap
1203 address handler = set_handler(&buffer);
1204 if (handler == NULL) {
1205 // use slow signature handler
1206 } else {
1207 // debugging suppport
1208 if (PrintSignatureHandlers) {
1209 tty->cr();
1210 tty->print_cr("argument handler #%d for: %s %s (fingerprint = " UINT64_FORMAT ", %d bytes generated)",
1211 _handlers->length(),
1212 (method->is_static() ? "static" : "receiver"),
1213 method->name_and_sig_as_C_string(),
1214 fingerprint,
1215 buffer.insts_size());
1216 Disassembler::decode(handler, handler + buffer.insts_size());
1217 #ifndef PRODUCT
1218 tty->print_cr(" --- associated result handler ---");
1219 address rh_begin = Interpreter::result_handler(method()->result_type());
1220 address rh_end = rh_begin;
1221 while (*(int*)rh_end != 0) {
1222 rh_end += sizeof(int);
1223 }
1224 Disassembler::decode(rh_begin, rh_end);
1225 #endif
1226 }
1227 // add handler to library
1228 _fingerprints->append(fingerprint);
1229 _handlers->append(handler);
1230 // set handler index
1231 assert(_fingerprints->length() == _handlers->length(), "sanity check");
1232 handler_index = _fingerprints->length() - 1;
1233 }
1234 }
1235 // Set handler under SignatureHandlerLibrary_lock
1236 if (handler_index < 0) {
1237 // use generic signature handler
1238 method->set_signature_handler(Interpreter::slow_signature_handler());
1239 } else {
1240 // set handler
1241 method->set_signature_handler(_handlers->at(handler_index));
1242 }
1243 } else {
1244 CHECK_UNHANDLED_OOPS_ONLY(Thread::current()->clear_unhandled_oops());
1245 // use generic signature handler
1246 method->set_signature_handler(Interpreter::slow_signature_handler());
1247 }
1248 }
1249 #ifdef ASSERT
1250 int handler_index = -1;
1251 int fingerprint_index = -2;
1252 {
1253 // '_handlers' and '_fingerprints' are 'GrowableArray's and are NOT synchronized
1254 // in any way if accessed from multiple threads. To avoid races with another
1255 // thread which may change the arrays in the above, mutex protected block, we
1256 // have to protect this read access here with the same mutex as well!
1257 MutexLocker mu(SignatureHandlerLibrary_lock);
1258 if (_handlers != NULL) {
1259 handler_index = _handlers->find(method->signature_handler());
1260 fingerprint_index = _fingerprints->find(Fingerprinter(method).fingerprint());
1261 }
1262 }
1263 assert(method->signature_handler() == Interpreter::slow_signature_handler() ||
1264 handler_index == fingerprint_index, "sanity check");
1265 #endif // ASSERT
1266 }
1267
1268
1269 BufferBlob* SignatureHandlerLibrary::_handler_blob = NULL;
1270 address SignatureHandlerLibrary::_handler = NULL;
1271 GrowableArray<uint64_t>* SignatureHandlerLibrary::_fingerprints = NULL;
1272 GrowableArray<address>* SignatureHandlerLibrary::_handlers = NULL;
1273 address SignatureHandlerLibrary::_buffer = NULL;
1274
1275
1276 IRT_ENTRY(void, InterpreterRuntime::prepare_native_call(JavaThread* thread, Method* method))
1277 methodHandle m(thread, method);
1278 assert(m->is_native(), "sanity check");
1279 // lookup native function entry point if it doesn't exist
1280 bool in_base_library;
1281 if (!m->has_native_function()) {
1282 NativeLookup::lookup(m, in_base_library, CHECK);
1283 }
1284 // make sure signature handler is installed
1285 SignatureHandlerLibrary::add(m);
1286 // The interpreter entry point checks the signature handler first,
1287 // before trying to fetch the native entry point and klass mirror.
1288 // We must set the signature handler last, so that multiple processors
1289 // preparing the same method will be sure to see non-null entry & mirror.
1290 IRT_END
1291
1292 #if defined(IA32) || defined(AMD64) || defined(ARM) || defined(AARCH64)
1293 IRT_LEAF(void, InterpreterRuntime::popframe_move_outgoing_args(JavaThread* thread, void* src_address, void* dest_address))
1294 if (src_address == dest_address) {
1295 return;
1296 }
1297 ResetNoHandleMark rnm; // In a LEAF entry.
1298 HandleMark hm;
1299 ResourceMark rm;
1300 frame fr = thread->last_frame();
1301 assert(fr.is_interpreted_frame(), "");
1302 jint bci = fr.interpreter_frame_bci();
1303 methodHandle mh(thread, fr.interpreter_frame_method());
1304 Bytecode_invoke invoke(mh, bci);
1305 ArgumentSizeComputer asc(invoke.signature());
1306 int size_of_arguments = (asc.size() + (invoke.has_receiver() ? 1 : 0)); // receiver
1307 Copy::conjoint_jbytes(src_address, dest_address,
1308 size_of_arguments * Interpreter::stackElementSize);
1309 IRT_END
1310 #endif
1311
1312 #if INCLUDE_JVMTI
1313 // This is a support of the JVMTI PopFrame interface.
1314 // Make sure it is an invokestatic of a polymorphic intrinsic that has a member_name argument
1315 // and return it as a vm_result so that it can be reloaded in the list of invokestatic parameters.
1316 // The member_name argument is a saved reference (in local#0) to the member_name.
1317 // For backward compatibility with some JDK versions (7, 8) it can also be a direct method handle.
1318 // FIXME: remove DMH case after j.l.i.InvokerBytecodeGenerator code shape is updated.
1319 IRT_ENTRY(void, InterpreterRuntime::member_name_arg_or_null(JavaThread* thread, address member_name,
1320 Method* method, address bcp))
1321 Bytecodes::Code code = Bytecodes::code_at(method, bcp);
1322 if (code != Bytecodes::_invokestatic) {
1323 return;
1324 }
1325 ConstantPool* cpool = method->constants();
1326 int cp_index = Bytes::get_native_u2(bcp + 1) + ConstantPool::CPCACHE_INDEX_TAG;
1327 Symbol* cname = cpool->klass_name_at(cpool->klass_ref_index_at(cp_index));
1328 Symbol* mname = cpool->name_ref_at(cp_index);
1329
1330 if (MethodHandles::has_member_arg(cname, mname)) {
1331 oop member_name_oop = (oop) member_name;
1332 if (java_lang_invoke_DirectMethodHandle::is_instance(member_name_oop)) {
1333 // FIXME: remove after j.l.i.InvokerBytecodeGenerator code shape is updated.
1334 member_name_oop = java_lang_invoke_DirectMethodHandle::member(member_name_oop);
1335 }
1336 thread->set_vm_result(member_name_oop);
1337 } else {
1338 thread->set_vm_result(NULL);
1339 }
1340 IRT_END
1341 #endif // INCLUDE_JVMTI