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