1 /*
2 * Copyright (c) 1997, 2013, 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 class UnlockFlagSaver {
79 private:
80 JavaThread* _thread;
81 bool _do_not_unlock;
82 public:
83 UnlockFlagSaver(JavaThread* t) {
84 _thread = t;
85 _do_not_unlock = t->do_not_unlock_if_synchronized();
86 t->set_do_not_unlock_if_synchronized(false);
87 }
88 ~UnlockFlagSaver() {
89 _thread->set_do_not_unlock_if_synchronized(_do_not_unlock);
90 }
91 };
92
93 //------------------------------------------------------------------------------------------------------------------------
94 // State accessors
95
96 void InterpreterRuntime::set_bcp_and_mdp(address bcp, JavaThread *thread) {
97 last_frame(thread).interpreter_frame_set_bcp(bcp);
98 if (ProfileInterpreter) {
99 // ProfileTraps uses MDOs independently of ProfileInterpreter.
100 // That is why we must check both ProfileInterpreter and mdo != NULL.
101 MethodData* mdo = last_frame(thread).interpreter_frame_method()->method_data();
102 if (mdo != NULL) {
103 NEEDS_CLEANUP;
104 last_frame(thread).interpreter_frame_set_mdp(mdo->bci_to_dp(last_frame(thread).interpreter_frame_bci()));
105 }
106 }
107 }
108
109 //------------------------------------------------------------------------------------------------------------------------
110 // Constants
111
112
113 IRT_ENTRY(void, InterpreterRuntime::ldc(JavaThread* thread, bool wide))
114 // access constant pool
115 ConstantPool* pool = method(thread)->constants();
116 int index = wide ? get_index_u2(thread, Bytecodes::_ldc_w) : get_index_u1(thread, Bytecodes::_ldc);
117 constantTag tag = pool->tag_at(index);
118
119 assert (tag.is_unresolved_klass() || tag.is_klass(), "wrong ldc call");
120 Klass* klass = pool->klass_at(index, CHECK);
121 oop java_class = klass->java_mirror();
122 thread->set_vm_result(java_class);
123 IRT_END
124
125 IRT_ENTRY(void, InterpreterRuntime::resolve_ldc(JavaThread* thread, Bytecodes::Code bytecode)) {
126 assert(bytecode == Bytecodes::_fast_aldc ||
127 bytecode == Bytecodes::_fast_aldc_w, "wrong bc");
128 ResourceMark rm(thread);
129 methodHandle m (thread, method(thread));
130 Bytecode_loadconstant ldc(m, bci(thread));
131 oop result = ldc.resolve_constant(CHECK);
132 #ifdef ASSERT
133 {
134 // The bytecode wrappers aren't GC-safe so construct a new one
135 Bytecode_loadconstant ldc2(m, bci(thread));
136 oop coop = m->constants()->resolved_references()->obj_at(ldc2.cache_index());
137 assert(result == coop, "expected result for assembly code");
138 }
139 #endif
140 thread->set_vm_result(result);
141 }
142 IRT_END
143
144
145 //------------------------------------------------------------------------------------------------------------------------
146 // Allocation
147
148 IRT_ENTRY(void, InterpreterRuntime::_new(JavaThread* thread, ConstantPool* pool, int index))
149 Klass* k_oop = pool->klass_at(index, CHECK);
150 instanceKlassHandle klass (THREAD, k_oop);
151
152 // Make sure we are not instantiating an abstract klass
153 klass->check_valid_for_instantiation(true, CHECK);
154
155 // Make sure klass is initialized
156 klass->initialize(CHECK);
157
158 // At this point the class may not be fully initialized
159 // because of recursive initialization. If it is fully
160 // initialized & has_finalized is not set, we rewrite
161 // it into its fast version (Note: no locking is needed
162 // here since this is an atomic byte write and can be
163 // done more than once).
164 //
165 // Note: In case of classes with has_finalized we don't
166 // rewrite since that saves us an extra check in
167 // the fast version which then would call the
168 // slow version anyway (and do a call back into
169 // Java).
170 // If we have a breakpoint, then we don't rewrite
171 // because the _breakpoint bytecode would be lost.
172 oop obj = klass->allocate_instance(CHECK);
173 thread->set_vm_result(obj);
174 IRT_END
175
176
177 IRT_ENTRY(void, InterpreterRuntime::newarray(JavaThread* thread, BasicType type, jint size))
178 oop obj = oopFactory::new_typeArray(type, size, CHECK);
179 thread->set_vm_result(obj);
180 IRT_END
181
182
183 IRT_ENTRY(void, InterpreterRuntime::anewarray(JavaThread* thread, ConstantPool* pool, int index, jint size))
184 // Note: no oopHandle for pool & klass needed since they are not used
185 // anymore after new_objArray() and no GC can happen before.
186 // (This may have to change if this code changes!)
187 Klass* klass = pool->klass_at(index, CHECK);
188 objArrayOop obj = oopFactory::new_objArray(klass, size, CHECK);
189 thread->set_vm_result(obj);
190 IRT_END
191
192
193 IRT_ENTRY(void, InterpreterRuntime::multianewarray(JavaThread* thread, jint* first_size_address))
194 // We may want to pass in more arguments - could make this slightly faster
195 ConstantPool* constants = method(thread)->constants();
196 int i = get_index_u2(thread, Bytecodes::_multianewarray);
197 Klass* klass = constants->klass_at(i, CHECK);
198 int nof_dims = number_of_dimensions(thread);
199 assert(klass->is_klass(), "not a class");
200 assert(nof_dims >= 1, "multianewarray rank must be nonzero");
201
202 // We must create an array of jints to pass to multi_allocate.
203 ResourceMark rm(thread);
204 const int small_dims = 10;
205 jint dim_array[small_dims];
206 jint *dims = &dim_array[0];
207 if (nof_dims > small_dims) {
208 dims = (jint*) NEW_RESOURCE_ARRAY(jint, nof_dims);
209 }
210 for (int index = 0; index < nof_dims; index++) {
211 // offset from first_size_address is addressed as local[index]
212 int n = Interpreter::local_offset_in_bytes(index)/jintSize;
213 dims[index] = first_size_address[n];
214 }
215 oop obj = ArrayKlass::cast(klass)->multi_allocate(nof_dims, dims, CHECK);
216 thread->set_vm_result(obj);
217 IRT_END
218
219
220 IRT_ENTRY(void, InterpreterRuntime::register_finalizer(JavaThread* thread, oopDesc* obj))
221 assert(obj->is_oop(), "must be a valid oop");
222 assert(obj->klass()->has_finalizer(), "shouldn't be here otherwise");
223 InstanceKlass::register_finalizer(instanceOop(obj), CHECK);
224 IRT_END
225
226
227 // Quicken instance-of and check-cast bytecodes
228 IRT_ENTRY(void, InterpreterRuntime::quicken_io_cc(JavaThread* thread))
229 // Force resolving; quicken the bytecode
230 int which = get_index_u2(thread, Bytecodes::_checkcast);
231 ConstantPool* cpool = method(thread)->constants();
232 // We'd expect to assert that we're only here to quicken bytecodes, but in a multithreaded
233 // program we might have seen an unquick'd bytecode in the interpreter but have another
234 // thread quicken the bytecode before we get here.
235 // assert( cpool->tag_at(which).is_unresolved_klass(), "should only come here to quicken bytecodes" );
236 Klass* klass = cpool->klass_at(which, CHECK);
237 thread->set_vm_result_2(klass);
238 IRT_END
239
240
241 //------------------------------------------------------------------------------------------------------------------------
242 // Exceptions
243
244 void InterpreterRuntime::note_trap_inner(JavaThread* thread, int reason,
245 methodHandle trap_method, int trap_bci, TRAPS) {
246 if (trap_method.not_null()) {
247 MethodData* trap_mdo = trap_method->method_data();
248 if (trap_mdo == NULL) {
249 Method::build_interpreter_method_data(trap_method, THREAD);
250 if (HAS_PENDING_EXCEPTION) {
251 assert((PENDING_EXCEPTION->is_a(SystemDictionary::OutOfMemoryError_klass())),
252 "we expect only an OOM error here");
253 CLEAR_PENDING_EXCEPTION;
254 }
255 trap_mdo = trap_method->method_data();
256 // and fall through...
257 }
258 if (trap_mdo != NULL) {
259 // Update per-method count of trap events. The interpreter
260 // is updating the MDO to simulate the effect of compiler traps.
261 Deoptimization::update_method_data_from_interpreter(trap_mdo, trap_bci, reason);
262 }
263 }
264 }
265
266 // Assume the compiler is (or will be) interested in this event.
267 // If necessary, create an MDO to hold the information, and record it.
268 void InterpreterRuntime::note_trap(JavaThread* thread, int reason, TRAPS) {
269 assert(ProfileTraps, "call me only if profiling");
270 methodHandle trap_method(thread, method(thread));
271 int trap_bci = trap_method->bci_from(bcp(thread));
272 note_trap_inner(thread, reason, trap_method, trap_bci, THREAD);
273 }
274
275 #ifdef CC_INTERP
276 // As legacy note_trap, but we have more arguments.
277 IRT_ENTRY(void, InterpreterRuntime::note_trap(JavaThread* thread, int reason, Method *method, int trap_bci))
278 methodHandle trap_method(method);
279 note_trap_inner(thread, reason, trap_method, trap_bci, THREAD);
280 IRT_END
281
282 // Class Deoptimization is not visible in BytecodeInterpreter, so we need a wrapper
283 // for each exception.
284 void InterpreterRuntime::note_nullCheck_trap(JavaThread* thread, Method *method, int trap_bci)
285 { if (ProfileTraps) note_trap(thread, Deoptimization::Reason_null_check, method, trap_bci); }
286 void InterpreterRuntime::note_div0Check_trap(JavaThread* thread, Method *method, int trap_bci)
287 { if (ProfileTraps) note_trap(thread, Deoptimization::Reason_div0_check, method, trap_bci); }
288 void InterpreterRuntime::note_rangeCheck_trap(JavaThread* thread, Method *method, int trap_bci)
289 { if (ProfileTraps) note_trap(thread, Deoptimization::Reason_range_check, method, trap_bci); }
290 void InterpreterRuntime::note_classCheck_trap(JavaThread* thread, Method *method, int trap_bci)
291 { if (ProfileTraps) note_trap(thread, Deoptimization::Reason_class_check, method, trap_bci); }
292 void InterpreterRuntime::note_arrayCheck_trap(JavaThread* thread, Method *method, int trap_bci)
293 { if (ProfileTraps) note_trap(thread, Deoptimization::Reason_array_check, method, trap_bci); }
294 #endif // CC_INTERP
295
296
297 static Handle get_preinitialized_exception(Klass* k, TRAPS) {
298 // get klass
299 InstanceKlass* klass = InstanceKlass::cast(k);
300 assert(klass->is_initialized(),
301 "this klass should have been initialized during VM initialization");
302 // create instance - do not call constructor since we may have no
303 // (java) stack space left (should assert constructor is empty)
304 Handle exception;
305 oop exception_oop = klass->allocate_instance(CHECK_(exception));
306 exception = Handle(THREAD, exception_oop);
307 if (StackTraceInThrowable) {
308 java_lang_Throwable::fill_in_stack_trace(exception);
309 }
310 return exception;
311 }
312
313 // Special handling for stack overflow: since we don't have any (java) stack
314 // space left we use the pre-allocated & pre-initialized StackOverflowError
315 // klass to create an stack overflow error instance. We do not call its
316 // constructor for the same reason (it is empty, anyway).
317 IRT_ENTRY(void, InterpreterRuntime::throw_StackOverflowError(JavaThread* thread))
318 Handle exception = get_preinitialized_exception(
319 SystemDictionary::StackOverflowError_klass(),
320 CHECK);
321 THROW_HANDLE(exception);
322 IRT_END
323
324
325 IRT_ENTRY(void, InterpreterRuntime::create_exception(JavaThread* thread, char* name, char* message))
326 // lookup exception klass
327 TempNewSymbol s = SymbolTable::new_symbol(name, CHECK);
328 if (ProfileTraps) {
329 if (s == vmSymbols::java_lang_ArithmeticException()) {
330 note_trap(thread, Deoptimization::Reason_div0_check, CHECK);
331 } else if (s == vmSymbols::java_lang_NullPointerException()) {
332 note_trap(thread, Deoptimization::Reason_null_check, CHECK);
333 }
334 }
335 // create exception
336 Handle exception = Exceptions::new_exception(thread, s, message);
337 thread->set_vm_result(exception());
338 IRT_END
339
340
341 IRT_ENTRY(void, InterpreterRuntime::create_klass_exception(JavaThread* thread, char* name, oopDesc* obj))
342 ResourceMark rm(thread);
343 const char* klass_name = obj->klass()->external_name();
344 // lookup exception klass
345 TempNewSymbol s = SymbolTable::new_symbol(name, CHECK);
346 if (ProfileTraps) {
347 note_trap(thread, Deoptimization::Reason_class_check, CHECK);
348 }
349 // create exception, with klass name as detail message
350 Handle exception = Exceptions::new_exception(thread, s, klass_name);
351 thread->set_vm_result(exception());
352 IRT_END
353
354
355 IRT_ENTRY(void, InterpreterRuntime::throw_ArrayIndexOutOfBoundsException(JavaThread* thread, char* name, jint index))
356 char message[jintAsStringSize];
357 // lookup exception klass
358 TempNewSymbol s = SymbolTable::new_symbol(name, CHECK);
359 if (ProfileTraps) {
360 note_trap(thread, Deoptimization::Reason_range_check, CHECK);
361 }
362 // create exception
363 sprintf(message, "%d", index);
364 THROW_MSG(s, message);
365 IRT_END
366
367 IRT_ENTRY(void, InterpreterRuntime::throw_ClassCastException(
368 JavaThread* thread, oopDesc* obj))
369
370 ResourceMark rm(thread);
371 char* message = SharedRuntime::generate_class_cast_message(
372 thread, obj->klass()->external_name());
373
374 if (ProfileTraps) {
375 note_trap(thread, Deoptimization::Reason_class_check, CHECK);
376 }
377
378 // create exception
379 THROW_MSG(vmSymbols::java_lang_ClassCastException(), message);
380 IRT_END
381
382 // exception_handler_for_exception(...) returns the continuation address,
383 // the exception oop (via TLS) and sets the bci/bcp for the continuation.
384 // The exception oop is returned to make sure it is preserved over GC (it
385 // is only on the stack if the exception was thrown explicitly via athrow).
386 // During this operation, the expression stack contains the values for the
387 // bci where the exception happened. If the exception was propagated back
388 // from a call, the expression stack contains the values for the bci at the
389 // invoke w/o arguments (i.e., as if one were inside the call).
390 IRT_ENTRY(address, InterpreterRuntime::exception_handler_for_exception(JavaThread* thread, oopDesc* exception))
391
392 Handle h_exception(thread, exception);
393 methodHandle h_method (thread, method(thread));
394 constantPoolHandle h_constants(thread, h_method->constants());
395 bool should_repeat;
396 int handler_bci;
397 int current_bci = bci(thread);
398
399 // Need to do this check first since when _do_not_unlock_if_synchronized
400 // is set, we don't want to trigger any classloading which may make calls
401 // into java, or surprisingly find a matching exception handler for bci 0
402 // since at this moment the method hasn't been "officially" entered yet.
403 if (thread->do_not_unlock_if_synchronized()) {
404 ResourceMark rm;
405 assert(current_bci == 0, "bci isn't zero for do_not_unlock_if_synchronized");
406 thread->set_vm_result(exception);
407 #ifdef CC_INTERP
408 return (address) -1;
409 #else
410 return Interpreter::remove_activation_entry();
411 #endif
412 }
413
414 do {
415 should_repeat = false;
416
417 // assertions
418 #ifdef ASSERT
419 assert(h_exception.not_null(), "NULL exceptions should be handled by athrow");
420 assert(h_exception->is_oop(), "just checking");
421 // Check that exception is a subclass of Throwable, otherwise we have a VerifyError
422 if (!(h_exception->is_a(SystemDictionary::Throwable_klass()))) {
423 if (ExitVMOnVerifyError) vm_exit(-1);
424 ShouldNotReachHere();
425 }
426 #endif
427
428 // tracing
429 if (TraceExceptions) {
430 ttyLocker ttyl;
431 ResourceMark rm(thread);
432 tty->print_cr("Exception <%s> (" INTPTR_FORMAT ")", h_exception->print_value_string(), (address)h_exception());
433 tty->print_cr(" thrown in interpreter method <%s>", h_method->print_value_string());
434 tty->print_cr(" at bci %d for thread " INTPTR_FORMAT, current_bci, thread);
435 }
436 // Don't go paging in something which won't be used.
437 // else if (extable->length() == 0) {
438 // // disabled for now - interpreter is not using shortcut yet
439 // // (shortcut is not to call runtime if we have no exception handlers)
440 // // warning("performance bug: should not call runtime if method has no exception handlers");
441 // }
442 // for AbortVMOnException flag
443 NOT_PRODUCT(Exceptions::debug_check_abort(h_exception));
444
445 // exception handler lookup
446 KlassHandle h_klass(THREAD, h_exception->klass());
447 handler_bci = Method::fast_exception_handler_bci_for(h_method, h_klass, current_bci, THREAD);
448 if (HAS_PENDING_EXCEPTION) {
449 // We threw an exception while trying to find the exception handler.
450 // Transfer the new exception to the exception handle which will
451 // be set into thread local storage, and do another lookup for an
452 // exception handler for this exception, this time starting at the
453 // BCI of the exception handler which caused the exception to be
454 // thrown (bug 4307310).
455 h_exception = Handle(THREAD, PENDING_EXCEPTION);
456 CLEAR_PENDING_EXCEPTION;
457 if (handler_bci >= 0) {
458 current_bci = handler_bci;
459 should_repeat = true;
460 }
461 }
462 } while (should_repeat == true);
463
464 // notify JVMTI of an exception throw; JVMTI will detect if this is a first
465 // time throw or a stack unwinding throw and accordingly notify the debugger
466 if (JvmtiExport::can_post_on_exceptions()) {
467 JvmtiExport::post_exception_throw(thread, h_method(), bcp(thread), h_exception());
468 }
469
470 #ifdef CC_INTERP
471 address continuation = (address)(intptr_t) handler_bci;
472 #else
473 address continuation = NULL;
474 #endif
475 address handler_pc = NULL;
476 if (handler_bci < 0 || !thread->reguard_stack((address) &continuation)) {
477 // Forward exception to callee (leaving bci/bcp untouched) because (a) no
478 // handler in this method, or (b) after a stack overflow there is not yet
479 // enough stack space available to reprotect the stack.
480 #ifndef CC_INTERP
481 continuation = Interpreter::remove_activation_entry();
482 #endif
483 // Count this for compilation purposes
484 h_method->interpreter_throwout_increment(THREAD);
485 } else {
486 // handler in this method => change bci/bcp to handler bci/bcp and continue there
487 handler_pc = h_method->code_base() + handler_bci;
488 #ifndef CC_INTERP
489 set_bcp_and_mdp(handler_pc, thread);
490 continuation = Interpreter::dispatch_table(vtos)[*handler_pc];
491 #endif
492 }
493 // notify debugger of an exception catch
494 // (this is good for exceptions caught in native methods as well)
495 if (JvmtiExport::can_post_on_exceptions()) {
496 JvmtiExport::notice_unwind_due_to_exception(thread, h_method(), handler_pc, h_exception(), (handler_pc != NULL));
497 }
498
499 thread->set_vm_result(h_exception());
500 return continuation;
501 IRT_END
502
503
504 IRT_ENTRY(void, InterpreterRuntime::throw_pending_exception(JavaThread* thread))
505 assert(thread->has_pending_exception(), "must only ne called if there's an exception pending");
506 // nothing to do - eventually we should remove this code entirely (see comments @ call sites)
507 IRT_END
508
509
510 IRT_ENTRY(void, InterpreterRuntime::throw_AbstractMethodError(JavaThread* thread))
511 THROW(vmSymbols::java_lang_AbstractMethodError());
512 IRT_END
513
514
515 IRT_ENTRY(void, InterpreterRuntime::throw_IncompatibleClassChangeError(JavaThread* thread))
516 THROW(vmSymbols::java_lang_IncompatibleClassChangeError());
517 IRT_END
518
519
520 //------------------------------------------------------------------------------------------------------------------------
521 // Fields
522 //
523
524 IRT_ENTRY(void, InterpreterRuntime::resolve_get_put(JavaThread* thread, Bytecodes::Code bytecode))
525 // resolve field
526 FieldAccessInfo info;
527 constantPoolHandle pool(thread, method(thread)->constants());
528 bool is_put = (bytecode == Bytecodes::_putfield || bytecode == Bytecodes::_putstatic);
529 bool is_static = (bytecode == Bytecodes::_getstatic || bytecode == Bytecodes::_putstatic);
530
531 {
532 JvmtiHideSingleStepping jhss(thread);
533 LinkResolver::resolve_field(info, pool, get_index_u2_cpcache(thread, bytecode),
534 bytecode, false, CHECK);
535 } // end JvmtiHideSingleStepping
536
537 // check if link resolution caused cpCache to be updated
538 if (already_resolved(thread)) return;
539
540 // compute auxiliary field attributes
541 TosState state = as_TosState(info.field_type());
542
543 // We need to delay resolving put instructions on final fields
544 // until we actually invoke one. This is required so we throw
545 // exceptions at the correct place. If we do not resolve completely
546 // in the current pass, leaving the put_code set to zero will
547 // cause the next put instruction to reresolve.
548 Bytecodes::Code put_code = (Bytecodes::Code)0;
549
550 // We also need to delay resolving getstatic instructions until the
551 // class is intitialized. This is required so that access to the static
552 // field will call the initialization function every time until the class
553 // is completely initialized ala. in 2.17.5 in JVM Specification.
554 InstanceKlass *klass = InstanceKlass::cast(info.klass()());
555 bool uninitialized_static = ((bytecode == Bytecodes::_getstatic || bytecode == Bytecodes::_putstatic) &&
556 !klass->is_initialized());
557 Bytecodes::Code get_code = (Bytecodes::Code)0;
558
559 if (!uninitialized_static) {
560 get_code = ((is_static) ? Bytecodes::_getstatic : Bytecodes::_getfield);
561 if (is_put || !info.access_flags().is_final()) {
562 put_code = ((is_static) ? Bytecodes::_putstatic : Bytecodes::_putfield);
563 }
564 }
565
566 cache_entry(thread)->set_field(
567 get_code,
568 put_code,
569 info.klass(),
570 info.field_index(),
571 info.field_offset(),
572 state,
573 info.access_flags().is_final(),
574 info.access_flags().is_volatile(),
575 pool->pool_holder()
576 );
577 IRT_END
578
579
580 //------------------------------------------------------------------------------------------------------------------------
581 // Synchronization
582 //
583 // The interpreter's synchronization code is factored out so that it can
584 // be shared by method invocation and synchronized blocks.
585 //%note synchronization_3
586
587 //%note monitor_1
588 IRT_ENTRY_NO_ASYNC(void, InterpreterRuntime::monitorenter(JavaThread* thread, BasicObjectLock* elem))
589 #ifdef ASSERT
590 thread->last_frame().interpreter_frame_verify_monitor(elem);
591 #endif
592 if (PrintBiasedLockingStatistics) {
593 Atomic::inc(BiasedLocking::slow_path_entry_count_addr());
594 }
595 Handle h_obj(thread, elem->obj());
596 assert(Universe::heap()->is_in_reserved_or_null(h_obj()),
597 "must be NULL or an object");
598 if (UseBiasedLocking) {
599 // Retry fast entry if bias is revoked to avoid unnecessary inflation
600 ObjectSynchronizer::fast_enter(h_obj, elem->lock(), true, CHECK);
601 } else {
602 ObjectSynchronizer::slow_enter(h_obj, elem->lock(), CHECK);
603 }
604 assert(Universe::heap()->is_in_reserved_or_null(elem->obj()),
605 "must be NULL or an object");
606 #ifdef ASSERT
607 thread->last_frame().interpreter_frame_verify_monitor(elem);
608 #endif
609 IRT_END
610
611
612 //%note monitor_1
613 IRT_ENTRY_NO_ASYNC(void, InterpreterRuntime::monitorexit(JavaThread* thread, BasicObjectLock* elem))
614 #ifdef ASSERT
615 thread->last_frame().interpreter_frame_verify_monitor(elem);
616 #endif
617 Handle h_obj(thread, elem->obj());
618 assert(Universe::heap()->is_in_reserved_or_null(h_obj()),
619 "must be NULL or an object");
620 if (elem == NULL || h_obj()->is_unlocked()) {
621 THROW(vmSymbols::java_lang_IllegalMonitorStateException());
622 }
623 ObjectSynchronizer::slow_exit(h_obj(), elem->lock(), thread);
624 // Free entry. This must be done here, since a pending exception might be installed on
625 // exit. If it is not cleared, the exception handling code will try to unlock the monitor again.
626 elem->set_obj(NULL);
627 #ifdef ASSERT
628 thread->last_frame().interpreter_frame_verify_monitor(elem);
629 #endif
630 IRT_END
631
632
633 IRT_ENTRY(void, InterpreterRuntime::throw_illegal_monitor_state_exception(JavaThread* thread))
634 THROW(vmSymbols::java_lang_IllegalMonitorStateException());
635 IRT_END
636
637
638 IRT_ENTRY(void, InterpreterRuntime::new_illegal_monitor_state_exception(JavaThread* thread))
639 // Returns an illegal exception to install into the current thread. The
640 // pending_exception flag is cleared so normal exception handling does not
641 // trigger. Any current installed exception will be overwritten. This
642 // method will be called during an exception unwind.
643
644 assert(!HAS_PENDING_EXCEPTION, "no pending exception");
645 Handle exception(thread, thread->vm_result());
646 assert(exception() != NULL, "vm result should be set");
647 thread->set_vm_result(NULL); // clear vm result before continuing (may cause memory leaks and assert failures)
648 if (!exception->is_a(SystemDictionary::ThreadDeath_klass())) {
649 exception = get_preinitialized_exception(
650 SystemDictionary::IllegalMonitorStateException_klass(),
651 CATCH);
652 }
653 thread->set_vm_result(exception());
654 IRT_END
655
656
657 //------------------------------------------------------------------------------------------------------------------------
658 // Invokes
659
660 IRT_ENTRY(Bytecodes::Code, InterpreterRuntime::get_original_bytecode_at(JavaThread* thread, Method* method, address bcp))
661 return method->orig_bytecode_at(method->bci_from(bcp));
662 IRT_END
663
664 IRT_ENTRY(void, InterpreterRuntime::set_original_bytecode_at(JavaThread* thread, Method* method, address bcp, Bytecodes::Code new_code))
665 method->set_orig_bytecode_at(method->bci_from(bcp), new_code);
666 IRT_END
667
668 IRT_ENTRY(void, InterpreterRuntime::_breakpoint(JavaThread* thread, Method* method, address bcp))
669 JvmtiExport::post_raw_breakpoint(thread, method, bcp);
670 IRT_END
671
672 IRT_ENTRY(void, InterpreterRuntime::resolve_invoke(JavaThread* thread, Bytecodes::Code bytecode)) {
673 // extract receiver from the outgoing argument list if necessary
674 Handle receiver(thread, NULL);
675 if (bytecode == Bytecodes::_invokevirtual || bytecode == Bytecodes::_invokeinterface) {
676 ResourceMark rm(thread);
677 methodHandle m (thread, method(thread));
678 Bytecode_invoke call(m, bci(thread));
679 Symbol* signature = call.signature();
680 receiver = Handle(thread,
681 thread->last_frame().interpreter_callee_receiver(signature));
682 assert(Universe::heap()->is_in_reserved_or_null(receiver()),
683 "sanity check");
684 assert(receiver.is_null() ||
685 !Universe::heap()->is_in_reserved(receiver->klass()),
686 "sanity check");
687 }
688
689 // resolve method
690 CallInfo info;
691 constantPoolHandle pool(thread, method(thread)->constants());
692
693 {
694 JvmtiHideSingleStepping jhss(thread);
695 LinkResolver::resolve_invoke(info, receiver, pool,
696 get_index_u2_cpcache(thread, bytecode), bytecode, CHECK);
697 if (JvmtiExport::can_hotswap_or_post_breakpoint()) {
698 int retry_count = 0;
699 while (info.resolved_method()->is_old()) {
700 // It is very unlikely that method is redefined more than 100 times
701 // in the middle of resolve. If it is looping here more than 100 times
702 // means then there could be a bug here.
703 guarantee((retry_count++ < 100),
704 "Could not resolve to latest version of redefined method");
705 // method is redefined in the middle of resolve so re-try.
706 LinkResolver::resolve_invoke(info, receiver, pool,
707 get_index_u2_cpcache(thread, bytecode), bytecode, CHECK);
708 }
709 }
710 } // end JvmtiHideSingleStepping
711
712 // check if link resolution caused cpCache to be updated
713 if (already_resolved(thread)) return;
714
715 if (bytecode == Bytecodes::_invokeinterface) {
716
717 if (TraceItables && Verbose) {
718 ResourceMark rm(thread);
719 tty->print_cr("Resolving: klass: %s to method: %s", info.resolved_klass()->name()->as_C_string(), info.resolved_method()->name()->as_C_string());
720 }
721 if (info.resolved_method()->method_holder() ==
722 SystemDictionary::Object_klass()) {
723 // NOTE: THIS IS A FIX FOR A CORNER CASE in the JVM spec
724 // (see also cpCacheOop.cpp for details)
725 methodHandle rm = info.resolved_method();
726 assert(rm->is_final() || info.has_vtable_index(),
727 "should have been set already");
728 cache_entry(thread)->set_method(bytecode, rm, info.vtable_index());
729 } else {
730 // Setup itable entry
731 int index = klassItable::compute_itable_index(info.resolved_method()());
732 cache_entry(thread)->set_interface_call(info.resolved_method(), index);
733 }
734 } else {
735 cache_entry(thread)->set_method(
736 bytecode,
737 info.resolved_method(),
738 info.vtable_index());
739 }
740 }
741 IRT_END
742
743
744 // First time execution: Resolve symbols, create a permanent MethodType object.
745 IRT_ENTRY(void, InterpreterRuntime::resolve_invokehandle(JavaThread* thread)) {
746 assert(EnableInvokeDynamic, "");
747 const Bytecodes::Code bytecode = Bytecodes::_invokehandle;
748
749 // resolve method
750 CallInfo info;
751 constantPoolHandle pool(thread, method(thread)->constants());
752
753 {
754 JvmtiHideSingleStepping jhss(thread);
755 LinkResolver::resolve_invoke(info, Handle(), pool,
756 get_index_u2_cpcache(thread, bytecode), bytecode, CHECK);
757 } // end JvmtiHideSingleStepping
758
759 cache_entry(thread)->set_method_handle(pool, info);
760 }
761 IRT_END
762
763
764 // First time execution: Resolve symbols, create a permanent CallSite object.
765 IRT_ENTRY(void, InterpreterRuntime::resolve_invokedynamic(JavaThread* thread)) {
766 assert(EnableInvokeDynamic, "");
767 const Bytecodes::Code bytecode = Bytecodes::_invokedynamic;
768
769 //TO DO: consider passing BCI to Java.
770 // int caller_bci = method(thread)->bci_from(bcp(thread));
771
772 // resolve method
773 CallInfo info;
774 constantPoolHandle pool(thread, method(thread)->constants());
775 int index = get_index_u4(thread, bytecode);
776 {
777 JvmtiHideSingleStepping jhss(thread);
778 LinkResolver::resolve_invoke(info, Handle(), pool,
779 index, bytecode, CHECK);
780 } // end JvmtiHideSingleStepping
781
782 ConstantPoolCacheEntry* cp_cache_entry = pool->invokedynamic_cp_cache_entry_at(index);
783 cp_cache_entry->set_dynamic_call(pool, info);
784 }
785 IRT_END
786
787
788 //------------------------------------------------------------------------------------------------------------------------
789 // Miscellaneous
790
791
792 nmethod* InterpreterRuntime::frequency_counter_overflow(JavaThread* thread, address branch_bcp) {
793 nmethod* nm = frequency_counter_overflow_inner(thread, branch_bcp);
794 assert(branch_bcp != NULL || nm == NULL, "always returns null for non OSR requests");
795 if (branch_bcp != NULL && nm != NULL) {
796 // This was a successful request for an OSR nmethod. Because
797 // frequency_counter_overflow_inner ends with a safepoint check,
798 // nm could have been unloaded so look it up again. It's unsafe
799 // to examine nm directly since it might have been freed and used
800 // for something else.
801 frame fr = thread->last_frame();
802 Method* method = fr.interpreter_frame_method();
803 int bci = method->bci_from(fr.interpreter_frame_bcp());
804 nm = method->lookup_osr_nmethod_for(bci, CompLevel_none, false);
805 }
806 #ifndef PRODUCT
807 if (TraceOnStackReplacement) {
808 if (nm != NULL) {
809 tty->print("OSR entry @ pc: " INTPTR_FORMAT ": ", nm->osr_entry());
810 nm->print();
811 }
812 }
813 #endif
814 return nm;
815 }
816
817 IRT_ENTRY(nmethod*,
818 InterpreterRuntime::frequency_counter_overflow_inner(JavaThread* thread, address branch_bcp))
819 // use UnlockFlagSaver to clear and restore the _do_not_unlock_if_synchronized
820 // flag, in case this method triggers classloading which will call into Java.
821 UnlockFlagSaver fs(thread);
822
823 frame fr = thread->last_frame();
824 assert(fr.is_interpreted_frame(), "must come from interpreter");
825 methodHandle method(thread, fr.interpreter_frame_method());
826 const int branch_bci = branch_bcp != NULL ? method->bci_from(branch_bcp) : InvocationEntryBci;
827 const int bci = branch_bcp != NULL ? method->bci_from(fr.interpreter_frame_bcp()) : InvocationEntryBci;
828
829 assert(!HAS_PENDING_EXCEPTION, "Should not have any exceptions pending");
830 nmethod* osr_nm = CompilationPolicy::policy()->event(method, method, branch_bci, bci, CompLevel_none, NULL, thread);
831 assert(!HAS_PENDING_EXCEPTION, "Event handler should not throw any exceptions");
832
833 if (osr_nm != NULL) {
834 // We may need to do on-stack replacement which requires that no
835 // monitors in the activation are biased because their
836 // BasicObjectLocks will need to migrate during OSR. Force
837 // unbiasing of all monitors in the activation now (even though
838 // the OSR nmethod might be invalidated) because we don't have a
839 // safepoint opportunity later once the migration begins.
840 if (UseBiasedLocking) {
841 ResourceMark rm;
842 GrowableArray<Handle>* objects_to_revoke = new GrowableArray<Handle>();
843 for( BasicObjectLock *kptr = fr.interpreter_frame_monitor_end();
844 kptr < fr.interpreter_frame_monitor_begin();
845 kptr = fr.next_monitor_in_interpreter_frame(kptr) ) {
846 if( kptr->obj() != NULL ) {
847 objects_to_revoke->append(Handle(THREAD, kptr->obj()));
848 }
849 }
850 BiasedLocking::revoke(objects_to_revoke);
851 }
852 }
853 return osr_nm;
854 IRT_END
855
856 IRT_LEAF(jint, InterpreterRuntime::bcp_to_di(Method* method, address cur_bcp))
857 assert(ProfileInterpreter, "must be profiling interpreter");
858 int bci = method->bci_from(cur_bcp);
859 MethodData* mdo = method->method_data();
860 if (mdo == NULL) return 0;
861 return mdo->bci_to_di(bci);
862 IRT_END
863
864 IRT_ENTRY(void, InterpreterRuntime::profile_method(JavaThread* thread))
865 // use UnlockFlagSaver to clear and restore the _do_not_unlock_if_synchronized
866 // flag, in case this method triggers classloading which will call into Java.
867 UnlockFlagSaver fs(thread);
868
869 assert(ProfileInterpreter, "must be profiling interpreter");
870 frame fr = thread->last_frame();
871 assert(fr.is_interpreted_frame(), "must come from interpreter");
872 methodHandle method(thread, fr.interpreter_frame_method());
873 Method::build_interpreter_method_data(method, THREAD);
874 if (HAS_PENDING_EXCEPTION) {
875 assert((PENDING_EXCEPTION->is_a(SystemDictionary::OutOfMemoryError_klass())), "we expect only an OOM error here");
876 CLEAR_PENDING_EXCEPTION;
877 // and fall through...
878 }
879 IRT_END
880
881
882 #ifdef ASSERT
883 IRT_LEAF(void, InterpreterRuntime::verify_mdp(Method* method, address bcp, address mdp))
884 assert(ProfileInterpreter, "must be profiling interpreter");
885
886 MethodData* mdo = method->method_data();
887 assert(mdo != NULL, "must not be null");
888
889 int bci = method->bci_from(bcp);
890
891 address mdp2 = mdo->bci_to_dp(bci);
892 if (mdp != mdp2) {
893 ResourceMark rm;
894 ResetNoHandleMark rnm; // In a LEAF entry.
895 HandleMark hm;
896 tty->print_cr("FAILED verify : actual mdp %p expected mdp %p @ bci %d", mdp, mdp2, bci);
897 int current_di = mdo->dp_to_di(mdp);
898 int expected_di = mdo->dp_to_di(mdp2);
899 tty->print_cr(" actual di %d expected di %d", current_di, expected_di);
900 int expected_approx_bci = mdo->data_at(expected_di)->bci();
901 int approx_bci = -1;
902 if (current_di >= 0) {
903 approx_bci = mdo->data_at(current_di)->bci();
904 }
905 tty->print_cr(" actual bci is %d expected bci %d", approx_bci, expected_approx_bci);
906 mdo->print_on(tty);
907 method->print_codes();
908 }
909 assert(mdp == mdp2, "wrong mdp");
910 IRT_END
911 #endif // ASSERT
912
913 IRT_ENTRY(void, InterpreterRuntime::update_mdp_for_ret(JavaThread* thread, int return_bci))
914 assert(ProfileInterpreter, "must be profiling interpreter");
915 ResourceMark rm(thread);
916 HandleMark hm(thread);
917 frame fr = thread->last_frame();
918 assert(fr.is_interpreted_frame(), "must come from interpreter");
919 MethodData* h_mdo = fr.interpreter_frame_method()->method_data();
920
921 // Grab a lock to ensure atomic access to setting the return bci and
922 // the displacement. This can block and GC, invalidating all naked oops.
923 MutexLocker ml(RetData_lock);
924
925 // ProfileData is essentially a wrapper around a derived oop, so we
926 // need to take the lock before making any ProfileData structures.
927 ProfileData* data = h_mdo->data_at(h_mdo->dp_to_di(fr.interpreter_frame_mdp()));
928 RetData* rdata = data->as_RetData();
929 address new_mdp = rdata->fixup_ret(return_bci, h_mdo);
930 fr.interpreter_frame_set_mdp(new_mdp);
931 IRT_END
932
933 IRT_ENTRY(MethodCounters*, InterpreterRuntime::build_method_counters(JavaThread* thread, Method* m))
934 MethodCounters* mcs = Method::build_method_counters(m, thread);
935 if (HAS_PENDING_EXCEPTION) {
936 assert((PENDING_EXCEPTION->is_a(SystemDictionary::OutOfMemoryError_klass())), "we expect only an OOM error here");
937 CLEAR_PENDING_EXCEPTION;
938 }
939 return mcs;
940 IRT_END
941
942
943 IRT_ENTRY(void, InterpreterRuntime::at_safepoint(JavaThread* thread))
944 // We used to need an explict preserve_arguments here for invoke bytecodes. However,
945 // stack traversal automatically takes care of preserving arguments for invoke, so
946 // this is no longer needed.
947
948 // IRT_END does an implicit safepoint check, hence we are guaranteed to block
949 // if this is called during a safepoint
950
951 if (JvmtiExport::should_post_single_step()) {
952 // We are called during regular safepoints and when the VM is
953 // single stepping. If any thread is marked for single stepping,
954 // then we may have JVMTI work to do.
955 JvmtiExport::at_single_stepping_point(thread, method(thread), bcp(thread));
956 }
957 IRT_END
958
959 IRT_ENTRY(void, InterpreterRuntime::post_field_access(JavaThread *thread, oopDesc* obj,
960 ConstantPoolCacheEntry *cp_entry))
961
962 // check the access_flags for the field in the klass
963
964 InstanceKlass* ik = InstanceKlass::cast(cp_entry->f1_as_klass());
965 int index = cp_entry->field_index();
966 if ((ik->field_access_flags(index) & JVM_ACC_FIELD_ACCESS_WATCHED) == 0) return;
967
968 switch(cp_entry->flag_state()) {
969 case btos: // fall through
970 case ctos: // fall through
971 case stos: // fall through
972 case itos: // fall through
973 case ftos: // fall through
974 case ltos: // fall through
975 case dtos: // fall through
976 case atos: break;
977 default: ShouldNotReachHere(); return;
978 }
979 bool is_static = (obj == NULL);
980 HandleMark hm(thread);
981
982 Handle h_obj;
983 if (!is_static) {
984 // non-static field accessors have an object, but we need a handle
985 h_obj = Handle(thread, obj);
986 }
987 instanceKlassHandle h_cp_entry_f1(thread, (Klass*)cp_entry->f1_as_klass());
988 jfieldID fid = jfieldIDWorkaround::to_jfieldID(h_cp_entry_f1, cp_entry->f2_as_index(), is_static);
989 JvmtiExport::post_field_access(thread, method(thread), bcp(thread), h_cp_entry_f1, h_obj, fid);
990 IRT_END
991
992 IRT_ENTRY(void, InterpreterRuntime::post_field_modification(JavaThread *thread,
993 oopDesc* obj, ConstantPoolCacheEntry *cp_entry, jvalue *value))
994
995 Klass* k = (Klass*)cp_entry->f1_as_klass();
996
997 // check the access_flags for the field in the klass
998 InstanceKlass* ik = InstanceKlass::cast(k);
999 int index = cp_entry->field_index();
1000 // bail out if field modifications are not watched
1001 if ((ik->field_access_flags(index) & JVM_ACC_FIELD_MODIFICATION_WATCHED) == 0) return;
1002
1003 char sig_type = '\0';
1004
1005 switch(cp_entry->flag_state()) {
1006 case btos: sig_type = 'Z'; break;
1007 case ctos: sig_type = 'C'; break;
1008 case stos: sig_type = 'S'; break;
1009 case itos: sig_type = 'I'; break;
1010 case ftos: sig_type = 'F'; break;
1011 case atos: sig_type = 'L'; break;
1012 case ltos: sig_type = 'J'; break;
1013 case dtos: sig_type = 'D'; break;
1014 default: ShouldNotReachHere(); return;
1015 }
1016 bool is_static = (obj == NULL);
1017
1018 HandleMark hm(thread);
1019 instanceKlassHandle h_klass(thread, k);
1020 jfieldID fid = jfieldIDWorkaround::to_jfieldID(h_klass, cp_entry->f2_as_index(), is_static);
1021 jvalue fvalue;
1022 #ifdef _LP64
1023 fvalue = *value;
1024 #else
1025 // Long/double values are stored unaligned and also noncontiguously with
1026 // tagged stacks. We can't just do a simple assignment even in the non-
1027 // J/D cases because a C++ compiler is allowed to assume that a jvalue is
1028 // 8-byte aligned, and interpreter stack slots are only 4-byte aligned.
1029 // We assume that the two halves of longs/doubles are stored in interpreter
1030 // stack slots in platform-endian order.
1031 jlong_accessor u;
1032 jint* newval = (jint*)value;
1033 u.words[0] = newval[0];
1034 u.words[1] = newval[Interpreter::stackElementWords]; // skip if tag
1035 fvalue.j = u.long_value;
1036 #endif // _LP64
1037
1038 Handle h_obj;
1039 if (!is_static) {
1040 // non-static field accessors have an object, but we need a handle
1041 h_obj = Handle(thread, obj);
1042 }
1043
1044 JvmtiExport::post_raw_field_modification(thread, method(thread), bcp(thread), h_klass, h_obj,
1045 fid, sig_type, &fvalue);
1046 IRT_END
1047
1048 IRT_ENTRY(void, InterpreterRuntime::post_method_entry(JavaThread *thread))
1049 JvmtiExport::post_method_entry(thread, InterpreterRuntime::method(thread), InterpreterRuntime::last_frame(thread));
1050 IRT_END
1051
1052
1053 IRT_ENTRY(void, InterpreterRuntime::post_method_exit(JavaThread *thread))
1054 JvmtiExport::post_method_exit(thread, InterpreterRuntime::method(thread), InterpreterRuntime::last_frame(thread));
1055 IRT_END
1056
1057 IRT_LEAF(int, InterpreterRuntime::interpreter_contains(address pc))
1058 {
1059 return (Interpreter::contains(pc) ? 1 : 0);
1060 }
1061 IRT_END
1062
1063
1064 // Implementation of SignatureHandlerLibrary
1065
1066 address SignatureHandlerLibrary::set_handler_blob() {
1067 BufferBlob* handler_blob = BufferBlob::create("native signature handlers", blob_size);
1068 if (handler_blob == NULL) {
1069 return NULL;
1070 }
1071 address handler = handler_blob->code_begin();
1072 _handler_blob = handler_blob;
1073 _handler = handler;
1074 return handler;
1075 }
1076
1077 void SignatureHandlerLibrary::initialize() {
1078 if (_fingerprints != NULL) {
1079 return;
1080 }
1081 if (set_handler_blob() == NULL) {
1082 vm_exit_out_of_memory(blob_size, OOM_MALLOC_ERROR, "native signature handlers");
1083 }
1084
1085 BufferBlob* bb = BufferBlob::create("Signature Handler Temp Buffer",
1086 SignatureHandlerLibrary::buffer_size);
1087 _buffer = bb->code_begin();
1088
1089 _fingerprints = new(ResourceObj::C_HEAP, mtCode)GrowableArray<uint64_t>(32, true);
1090 _handlers = new(ResourceObj::C_HEAP, mtCode)GrowableArray<address>(32, true);
1091 }
1092
1093 address SignatureHandlerLibrary::set_handler(CodeBuffer* buffer) {
1094 address handler = _handler;
1095 int insts_size = buffer->pure_insts_size();
1096 if (handler + insts_size > _handler_blob->code_end()) {
1097 // get a new handler blob
1098 handler = set_handler_blob();
1099 }
1100 if (handler != NULL) {
1101 memcpy(handler, buffer->insts_begin(), insts_size);
1102 pd_set_handler(handler);
1103 ICache::invalidate_range(handler, insts_size);
1104 _handler = handler + insts_size;
1105 }
1106 return handler;
1107 }
1108
1109 void SignatureHandlerLibrary::add(methodHandle method) {
1110 if (method->signature_handler() == NULL) {
1111 // use slow signature handler if we can't do better
1112 int handler_index = -1;
1113 // check if we can use customized (fast) signature handler
1114 if (UseFastSignatureHandlers && method->size_of_parameters() <= Fingerprinter::max_size_of_parameters) {
1115 // use customized signature handler
1116 MutexLocker mu(SignatureHandlerLibrary_lock);
1117 // make sure data structure is initialized
1118 initialize();
1119 // lookup method signature's fingerprint
1120 uint64_t fingerprint = Fingerprinter(method).fingerprint();
1121 handler_index = _fingerprints->find(fingerprint);
1122 // create handler if necessary
1123 if (handler_index < 0) {
1124 ResourceMark rm;
1125 ptrdiff_t align_offset = (address)
1126 round_to((intptr_t)_buffer, CodeEntryAlignment) - (address)_buffer;
1127 CodeBuffer buffer((address)(_buffer + align_offset),
1128 SignatureHandlerLibrary::buffer_size - align_offset);
1129 InterpreterRuntime::SignatureHandlerGenerator(method, &buffer).generate(fingerprint);
1130 // copy into code heap
1131 address handler = set_handler(&buffer);
1132 if (handler == NULL) {
1133 // use slow signature handler
1134 } else {
1135 // debugging suppport
1136 if (PrintSignatureHandlers) {
1137 tty->cr();
1138 tty->print_cr("argument handler #%d for: %s %s (fingerprint = " UINT64_FORMAT ", %d bytes generated)",
1139 _handlers->length(),
1140 (method->is_static() ? "static" : "receiver"),
1141 method->name_and_sig_as_C_string(),
1142 fingerprint,
1143 buffer.insts_size());
1144 Disassembler::decode(handler, handler + buffer.insts_size());
1145 #ifndef PRODUCT
1146 tty->print_cr(" --- associated result handler ---");
1147 address rh_begin = Interpreter::result_handler(method()->result_type());
1148 address rh_end = rh_begin;
1149 while (*(int*)rh_end != 0) {
1150 rh_end += sizeof(int);
1151 }
1152 Disassembler::decode(rh_begin, rh_end);
1153 #endif
1154 }
1155 // add handler to library
1156 _fingerprints->append(fingerprint);
1157 _handlers->append(handler);
1158 // set handler index
1159 assert(_fingerprints->length() == _handlers->length(), "sanity check");
1160 handler_index = _fingerprints->length() - 1;
1161 }
1162 }
1163 // Set handler under SignatureHandlerLibrary_lock
1164 if (handler_index < 0) {
1165 // use generic signature handler
1166 method->set_signature_handler(Interpreter::slow_signature_handler());
1167 } else {
1168 // set handler
1169 method->set_signature_handler(_handlers->at(handler_index));
1170 }
1171 } else {
1172 CHECK_UNHANDLED_OOPS_ONLY(Thread::current()->clear_unhandled_oops());
1173 // use generic signature handler
1174 method->set_signature_handler(Interpreter::slow_signature_handler());
1175 }
1176 }
1177 #ifdef ASSERT
1178 int handler_index = -1;
1179 int fingerprint_index = -2;
1180 {
1181 // '_handlers' and '_fingerprints' are 'GrowableArray's and are NOT synchronized
1182 // in any way if accessed from multiple threads. To avoid races with another
1183 // thread which may change the arrays in the above, mutex protected block, we
1184 // have to protect this read access here with the same mutex as well!
1185 MutexLocker mu(SignatureHandlerLibrary_lock);
1186 if (_handlers != NULL) {
1187 handler_index = _handlers->find(method->signature_handler());
1188 fingerprint_index = _fingerprints->find(Fingerprinter(method).fingerprint());
1189 }
1190 }
1191 assert(method->signature_handler() == Interpreter::slow_signature_handler() ||
1192 handler_index == fingerprint_index, "sanity check");
1193 #endif // ASSERT
1194 }
1195
1196
1197 BufferBlob* SignatureHandlerLibrary::_handler_blob = NULL;
1198 address SignatureHandlerLibrary::_handler = NULL;
1199 GrowableArray<uint64_t>* SignatureHandlerLibrary::_fingerprints = NULL;
1200 GrowableArray<address>* SignatureHandlerLibrary::_handlers = NULL;
1201 address SignatureHandlerLibrary::_buffer = NULL;
1202
1203
1204 IRT_ENTRY(void, InterpreterRuntime::prepare_native_call(JavaThread* thread, Method* method))
1205 methodHandle m(thread, method);
1206 assert(m->is_native(), "sanity check");
1207 // lookup native function entry point if it doesn't exist
1208 bool in_base_library;
1209 if (!m->has_native_function()) {
1210 NativeLookup::lookup(m, in_base_library, CHECK);
1211 }
1212 // make sure signature handler is installed
1213 SignatureHandlerLibrary::add(m);
1214 // The interpreter entry point checks the signature handler first,
1215 // before trying to fetch the native entry point and klass mirror.
1216 // We must set the signature handler last, so that multiple processors
1217 // preparing the same method will be sure to see non-null entry & mirror.
1218 IRT_END
1219
1220 #if defined(IA32) || defined(AMD64) || defined(ARM)
1221 IRT_LEAF(void, InterpreterRuntime::popframe_move_outgoing_args(JavaThread* thread, void* src_address, void* dest_address))
1222 if (src_address == dest_address) {
1223 return;
1224 }
1225 ResetNoHandleMark rnm; // In a LEAF entry.
1226 HandleMark hm;
1227 ResourceMark rm;
1228 frame fr = thread->last_frame();
1229 assert(fr.is_interpreted_frame(), "");
1230 jint bci = fr.interpreter_frame_bci();
1231 methodHandle mh(thread, fr.interpreter_frame_method());
1232 Bytecode_invoke invoke(mh, bci);
1233 ArgumentSizeComputer asc(invoke.signature());
1234 int size_of_arguments = (asc.size() + (invoke.has_receiver() ? 1 : 0)); // receiver
1235 Copy::conjoint_jbytes(src_address, dest_address,
1236 size_of_arguments * Interpreter::stackElementSize);
1237 IRT_END
1238 #endif
1239
1240 #if INCLUDE_JVMTI
1241 // This is a support of the JVMTI PopFrame interface.
1242 // Make sure it is an invokestatic of a polymorphic intrinsic that has a member_name argument
1243 // and return it as a vm_result so that it can be reloaded in the list of invokestatic parameters.
1244 // The dmh argument is a reference to a DirectMethoHandle that has a member name field.
1245 IRT_ENTRY(void, InterpreterRuntime::member_name_arg_or_null(JavaThread* thread, address dmh,
1246 Method* method, address bcp))
1247 Bytecodes::Code code = Bytecodes::code_at(method, bcp);
1248 if (code != Bytecodes::_invokestatic) {
1249 return;
1250 }
1251 ConstantPool* cpool = method->constants();
1252 int cp_index = Bytes::get_native_u2(bcp + 1) + ConstantPool::CPCACHE_INDEX_TAG;
1253 Symbol* cname = cpool->klass_name_at(cpool->klass_ref_index_at(cp_index));
1254 Symbol* mname = cpool->name_ref_at(cp_index);
1255
1256 if (MethodHandles::has_member_arg(cname, mname)) {
1257 oop member_name = java_lang_invoke_DirectMethodHandle::member((oop)dmh);
1258 thread->set_vm_result(member_name);
1259 }
1260 IRT_END
1261 #endif // INCLUDE_JVMTI