Mon, 12 Aug 2019 18:30:40 +0300
8223147: JFR Backport
8199712: Flight Recorder
8203346: JFR: Inconsistent signature of jfr_add_string_constant
8195817: JFR.stop should require name of recording
8195818: JFR.start should increase autogenerated name by one
8195819: Remove recording=x from jcmd JFR.check output
8203921: JFR thread sampling is missing fixes from JDK-8194552
8203929: Limit amount of data for JFR.dump
8203664: JFR start failure after AppCDS archive created with JFR StartFlightRecording
8003209: JFR events for network utilization
8207392: [PPC64] Implement JFR profiling
8202835: jfr/event/os/TestSystemProcess.java fails on missing events
Summary: Backport JFR from JDK11. Initial integration
Reviewed-by: neugens
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 */
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
78 PRAGMA_FORMAT_MUTE_WARNINGS_FOR_GCC
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 };
95 //------------------------------------------------------------------------------------------------------------------------
96 // State accessors
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 }
111 //------------------------------------------------------------------------------------------------------------------------
112 // Constants
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);
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
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
147 //------------------------------------------------------------------------------------------------------------------------
148 // Allocation
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);
154 // Make sure we are not instantiating an abstract klass
155 klass->check_valid_for_instantiation(true, CHECK);
157 // Make sure klass is initialized
158 klass->initialize(CHECK);
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
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
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
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");
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
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
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
243 //------------------------------------------------------------------------------------------------------------------------
244 // Exceptions
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 }
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 }
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
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
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 }
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
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
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
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
371 IRT_ENTRY(void, InterpreterRuntime::throw_ClassCastException(
372 JavaThread* thread, oopDesc* obj))
374 ResourceMark rm(thread);
375 char* message = SharedRuntime::generate_class_cast_message(
376 thread, obj->klass()->external_name());
378 if (ProfileTraps) {
379 note_trap(thread, Deoptimization::Reason_class_check, CHECK);
380 }
382 // create exception
383 THROW_MSG(vmSymbols::java_lang_ClassCastException(), message);
384 IRT_END
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))
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);
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 }
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 }
434 do {
435 should_repeat = false;
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
448 // tracing
449 if (TraceExceptions) {
450 ttyLocker ttyl;
451 ResourceMark rm(thread);
452 tty->print_cr("Exception <%s> (" INTPTR_FORMAT ")", h_exception->print_value_string(), (address)h_exception());
453 tty->print_cr(" thrown in interpreter method <%s>", h_method->print_value_string());
454 tty->print_cr(" at bci %d for thread " INTPTR_FORMAT, current_bci, thread);
455 }
456 // Don't go paging in something which won't be used.
457 // else if (extable->length() == 0) {
458 // // disabled for now - interpreter is not using shortcut yet
459 // // (shortcut is not to call runtime if we have no exception handlers)
460 // // warning("performance bug: should not call runtime if method has no exception handlers");
461 // }
462 // for AbortVMOnException flag
463 NOT_PRODUCT(Exceptions::debug_check_abort(h_exception));
465 // exception handler lookup
466 KlassHandle h_klass(THREAD, h_exception->klass());
467 handler_bci = Method::fast_exception_handler_bci_for(h_method, h_klass, current_bci, THREAD);
468 if (HAS_PENDING_EXCEPTION) {
469 // We threw an exception while trying to find the exception handler.
470 // Transfer the new exception to the exception handle which will
471 // be set into thread local storage, and do another lookup for an
472 // exception handler for this exception, this time starting at the
473 // BCI of the exception handler which caused the exception to be
474 // thrown (bug 4307310).
475 h_exception = Handle(THREAD, PENDING_EXCEPTION);
476 CLEAR_PENDING_EXCEPTION;
477 if (handler_bci >= 0) {
478 current_bci = handler_bci;
479 should_repeat = true;
480 }
481 }
482 } while (should_repeat == true);
484 // notify JVMTI of an exception throw; JVMTI will detect if this is a first
485 // time throw or a stack unwinding throw and accordingly notify the debugger
486 if (JvmtiExport::can_post_on_exceptions()) {
487 JvmtiExport::post_exception_throw(thread, h_method(), bcp(thread), h_exception());
488 }
490 #ifdef CC_INTERP
491 address continuation = (address)(intptr_t) handler_bci;
492 #else
493 address continuation = NULL;
494 #endif
495 address handler_pc = NULL;
496 if (handler_bci < 0 || !thread->reguard_stack((address) &continuation)) {
497 // Forward exception to callee (leaving bci/bcp untouched) because (a) no
498 // handler in this method, or (b) after a stack overflow there is not yet
499 // enough stack space available to reprotect the stack.
500 #ifndef CC_INTERP
501 continuation = Interpreter::remove_activation_entry();
502 #endif
503 // Count this for compilation purposes
504 h_method->interpreter_throwout_increment(THREAD);
505 } else {
506 // handler in this method => change bci/bcp to handler bci/bcp and continue there
507 handler_pc = h_method->code_base() + handler_bci;
508 #ifndef CC_INTERP
509 set_bcp_and_mdp(handler_pc, thread);
510 continuation = Interpreter::dispatch_table(vtos)[*handler_pc];
511 #endif
512 }
513 // notify debugger of an exception catch
514 // (this is good for exceptions caught in native methods as well)
515 if (JvmtiExport::can_post_on_exceptions()) {
516 JvmtiExport::notice_unwind_due_to_exception(thread, h_method(), handler_pc, h_exception(), (handler_pc != NULL));
517 }
519 thread->set_vm_result(h_exception());
520 return continuation;
521 IRT_END
524 IRT_ENTRY(void, InterpreterRuntime::throw_pending_exception(JavaThread* thread))
525 assert(thread->has_pending_exception(), "must only ne called if there's an exception pending");
526 // nothing to do - eventually we should remove this code entirely (see comments @ call sites)
527 IRT_END
530 IRT_ENTRY(void, InterpreterRuntime::throw_AbstractMethodError(JavaThread* thread))
531 THROW(vmSymbols::java_lang_AbstractMethodError());
532 IRT_END
535 IRT_ENTRY(void, InterpreterRuntime::throw_IncompatibleClassChangeError(JavaThread* thread))
536 THROW(vmSymbols::java_lang_IncompatibleClassChangeError());
537 IRT_END
540 //------------------------------------------------------------------------------------------------------------------------
541 // Fields
542 //
544 IRT_ENTRY(void, InterpreterRuntime::resolve_get_put(JavaThread* thread, Bytecodes::Code bytecode))
545 // resolve field
546 fieldDescriptor info;
547 constantPoolHandle pool(thread, method(thread)->constants());
548 bool is_put = (bytecode == Bytecodes::_putfield || bytecode == Bytecodes::_putstatic);
549 bool is_static = (bytecode == Bytecodes::_getstatic || bytecode == Bytecodes::_putstatic);
551 {
552 JvmtiHideSingleStepping jhss(thread);
553 LinkResolver::resolve_field_access(info, pool, get_index_u2_cpcache(thread, bytecode),
554 bytecode, CHECK);
555 } // end JvmtiHideSingleStepping
557 // check if link resolution caused cpCache to be updated
558 if (already_resolved(thread)) return;
560 // compute auxiliary field attributes
561 TosState state = as_TosState(info.field_type());
563 // We need to delay resolving put instructions on final fields
564 // until we actually invoke one. This is required so we throw
565 // exceptions at the correct place. If we do not resolve completely
566 // in the current pass, leaving the put_code set to zero will
567 // cause the next put instruction to reresolve.
568 Bytecodes::Code put_code = (Bytecodes::Code)0;
570 // We also need to delay resolving getstatic instructions until the
571 // class is intitialized. This is required so that access to the static
572 // field will call the initialization function every time until the class
573 // is completely initialized ala. in 2.17.5 in JVM Specification.
574 InstanceKlass* klass = InstanceKlass::cast(info.field_holder());
575 bool uninitialized_static = ((bytecode == Bytecodes::_getstatic || bytecode == Bytecodes::_putstatic) &&
576 !klass->is_initialized());
577 Bytecodes::Code get_code = (Bytecodes::Code)0;
579 if (!uninitialized_static) {
580 get_code = ((is_static) ? Bytecodes::_getstatic : Bytecodes::_getfield);
581 if (is_put || !info.access_flags().is_final()) {
582 put_code = ((is_static) ? Bytecodes::_putstatic : Bytecodes::_putfield);
583 }
584 }
586 cache_entry(thread)->set_field(
587 get_code,
588 put_code,
589 info.field_holder(),
590 info.index(),
591 info.offset(),
592 state,
593 info.access_flags().is_final(),
594 info.access_flags().is_volatile(),
595 pool->pool_holder()
596 );
597 IRT_END
600 //------------------------------------------------------------------------------------------------------------------------
601 // Synchronization
602 //
603 // The interpreter's synchronization code is factored out so that it can
604 // be shared by method invocation and synchronized blocks.
605 //%note synchronization_3
607 //%note monitor_1
608 IRT_ENTRY_NO_ASYNC(void, InterpreterRuntime::monitorenter(JavaThread* thread, BasicObjectLock* elem))
609 #ifdef ASSERT
610 thread->last_frame().interpreter_frame_verify_monitor(elem);
611 #endif
612 if (PrintBiasedLockingStatistics) {
613 Atomic::inc(BiasedLocking::slow_path_entry_count_addr());
614 }
615 Handle h_obj(thread, elem->obj());
616 assert(Universe::heap()->is_in_reserved_or_null(h_obj()),
617 "must be NULL or an object");
618 if (UseBiasedLocking) {
619 // Retry fast entry if bias is revoked to avoid unnecessary inflation
620 ObjectSynchronizer::fast_enter(h_obj, elem->lock(), true, CHECK);
621 } else {
622 ObjectSynchronizer::slow_enter(h_obj, elem->lock(), CHECK);
623 }
624 assert(Universe::heap()->is_in_reserved_or_null(elem->obj()),
625 "must be NULL or an object");
626 #ifdef ASSERT
627 thread->last_frame().interpreter_frame_verify_monitor(elem);
628 #endif
629 IRT_END
632 //%note monitor_1
633 IRT_ENTRY_NO_ASYNC(void, InterpreterRuntime::monitorexit(JavaThread* thread, BasicObjectLock* elem))
634 #ifdef ASSERT
635 thread->last_frame().interpreter_frame_verify_monitor(elem);
636 #endif
637 Handle h_obj(thread, elem->obj());
638 assert(Universe::heap()->is_in_reserved_or_null(h_obj()),
639 "must be NULL or an object");
640 if (elem == NULL || h_obj()->is_unlocked()) {
641 THROW(vmSymbols::java_lang_IllegalMonitorStateException());
642 }
643 ObjectSynchronizer::slow_exit(h_obj(), elem->lock(), thread);
644 // Free entry. This must be done here, since a pending exception might be installed on
645 // exit. If it is not cleared, the exception handling code will try to unlock the monitor again.
646 elem->set_obj(NULL);
647 #ifdef ASSERT
648 thread->last_frame().interpreter_frame_verify_monitor(elem);
649 #endif
650 IRT_END
653 IRT_ENTRY(void, InterpreterRuntime::throw_illegal_monitor_state_exception(JavaThread* thread))
654 THROW(vmSymbols::java_lang_IllegalMonitorStateException());
655 IRT_END
658 IRT_ENTRY(void, InterpreterRuntime::new_illegal_monitor_state_exception(JavaThread* thread))
659 // Returns an illegal exception to install into the current thread. The
660 // pending_exception flag is cleared so normal exception handling does not
661 // trigger. Any current installed exception will be overwritten. This
662 // method will be called during an exception unwind.
664 assert(!HAS_PENDING_EXCEPTION, "no pending exception");
665 Handle exception(thread, thread->vm_result());
666 assert(exception() != NULL, "vm result should be set");
667 thread->set_vm_result(NULL); // clear vm result before continuing (may cause memory leaks and assert failures)
668 if (!exception->is_a(SystemDictionary::ThreadDeath_klass())) {
669 exception = get_preinitialized_exception(
670 SystemDictionary::IllegalMonitorStateException_klass(),
671 CATCH);
672 }
673 thread->set_vm_result(exception());
674 IRT_END
677 //------------------------------------------------------------------------------------------------------------------------
678 // Invokes
680 IRT_ENTRY(Bytecodes::Code, InterpreterRuntime::get_original_bytecode_at(JavaThread* thread, Method* method, address bcp))
681 return method->orig_bytecode_at(method->bci_from(bcp));
682 IRT_END
684 IRT_ENTRY(void, InterpreterRuntime::set_original_bytecode_at(JavaThread* thread, Method* method, address bcp, Bytecodes::Code new_code))
685 method->set_orig_bytecode_at(method->bci_from(bcp), new_code);
686 IRT_END
688 IRT_ENTRY(void, InterpreterRuntime::_breakpoint(JavaThread* thread, Method* method, address bcp))
689 JvmtiExport::post_raw_breakpoint(thread, method, bcp);
690 IRT_END
692 IRT_ENTRY(void, InterpreterRuntime::resolve_invoke(JavaThread* thread, Bytecodes::Code bytecode)) {
693 // extract receiver from the outgoing argument list if necessary
694 Handle receiver(thread, NULL);
695 if (bytecode == Bytecodes::_invokevirtual || bytecode == Bytecodes::_invokeinterface ||
696 bytecode == Bytecodes::_invokespecial) {
697 ResourceMark rm(thread);
698 methodHandle m (thread, method(thread));
699 Bytecode_invoke call(m, bci(thread));
700 Symbol* signature = call.signature();
701 receiver = Handle(thread,
702 thread->last_frame().interpreter_callee_receiver(signature));
703 assert(Universe::heap()->is_in_reserved_or_null(receiver()),
704 "sanity check");
705 assert(receiver.is_null() ||
706 !Universe::heap()->is_in_reserved(receiver->klass()),
707 "sanity check");
708 }
710 // resolve method
711 CallInfo info;
712 constantPoolHandle pool(thread, method(thread)->constants());
714 {
715 JvmtiHideSingleStepping jhss(thread);
716 LinkResolver::resolve_invoke(info, receiver, pool,
717 get_index_u2_cpcache(thread, bytecode), bytecode, CHECK);
718 if (JvmtiExport::can_hotswap_or_post_breakpoint()) {
719 int retry_count = 0;
720 while (info.resolved_method()->is_old()) {
721 // It is very unlikely that method is redefined more than 100 times
722 // in the middle of resolve. If it is looping here more than 100 times
723 // means then there could be a bug here.
724 guarantee((retry_count++ < 100),
725 "Could not resolve to latest version of redefined method");
726 // method is redefined in the middle of resolve so re-try.
727 LinkResolver::resolve_invoke(info, receiver, pool,
728 get_index_u2_cpcache(thread, bytecode), bytecode, CHECK);
729 }
730 }
731 } // end JvmtiHideSingleStepping
733 // check if link resolution caused cpCache to be updated
734 if (already_resolved(thread)) return;
736 if (bytecode == Bytecodes::_invokeinterface) {
737 if (TraceItables && Verbose) {
738 ResourceMark rm(thread);
739 tty->print_cr("Resolving: klass: %s to method: %s", info.resolved_klass()->name()->as_C_string(), info.resolved_method()->name()->as_C_string());
740 }
741 }
742 #ifdef ASSERT
743 if (bytecode == Bytecodes::_invokeinterface) {
744 if (info.resolved_method()->method_holder() ==
745 SystemDictionary::Object_klass()) {
746 // NOTE: THIS IS A FIX FOR A CORNER CASE in the JVM spec
747 // (see also CallInfo::set_interface for details)
748 assert(info.call_kind() == CallInfo::vtable_call ||
749 info.call_kind() == CallInfo::direct_call, "");
750 methodHandle rm = info.resolved_method();
751 assert(rm->is_final() || info.has_vtable_index(),
752 "should have been set already");
753 } else if (!info.resolved_method()->has_itable_index()) {
754 // Resolved something like CharSequence.toString. Use vtable not itable.
755 assert(info.call_kind() != CallInfo::itable_call, "");
756 } else {
757 // Setup itable entry
758 assert(info.call_kind() == CallInfo::itable_call, "");
759 int index = info.resolved_method()->itable_index();
760 assert(info.itable_index() == index, "");
761 }
762 } else if (bytecode == Bytecodes::_invokespecial) {
763 assert(info.call_kind() == CallInfo::direct_call, "must be direct call");
764 } else {
765 assert(info.call_kind() == CallInfo::direct_call ||
766 info.call_kind() == CallInfo::vtable_call, "");
767 }
768 #endif
769 // Get sender or sender's host_klass, and only set cpCache entry to resolved if
770 // it is not an interface. The receiver for invokespecial calls within interface
771 // methods must be checked for every call.
772 InstanceKlass* sender = pool->pool_holder();
773 sender = sender->has_host_klass() ? InstanceKlass::cast(sender->host_klass()) : sender;
775 switch (info.call_kind()) {
776 case CallInfo::direct_call:
777 cache_entry(thread)->set_direct_call(
778 bytecode,
779 info.resolved_method(),
780 sender->is_interface());
781 break;
782 case CallInfo::vtable_call:
783 cache_entry(thread)->set_vtable_call(
784 bytecode,
785 info.resolved_method(),
786 info.vtable_index());
787 break;
788 case CallInfo::itable_call:
789 cache_entry(thread)->set_itable_call(
790 bytecode,
791 info.resolved_klass(),
792 info.resolved_method(),
793 info.itable_index());
794 break;
795 default: ShouldNotReachHere();
796 }
797 }
798 IRT_END
801 // First time execution: Resolve symbols, create a permanent MethodType object.
802 IRT_ENTRY(void, InterpreterRuntime::resolve_invokehandle(JavaThread* thread)) {
803 assert(EnableInvokeDynamic, "");
804 const Bytecodes::Code bytecode = Bytecodes::_invokehandle;
806 // resolve method
807 CallInfo info;
808 constantPoolHandle pool(thread, method(thread)->constants());
810 {
811 JvmtiHideSingleStepping jhss(thread);
812 LinkResolver::resolve_invoke(info, Handle(), pool,
813 get_index_u2_cpcache(thread, bytecode), bytecode, CHECK);
814 } // end JvmtiHideSingleStepping
816 cache_entry(thread)->set_method_handle(pool, info);
817 }
818 IRT_END
821 // First time execution: Resolve symbols, create a permanent CallSite object.
822 IRT_ENTRY(void, InterpreterRuntime::resolve_invokedynamic(JavaThread* thread)) {
823 assert(EnableInvokeDynamic, "");
824 const Bytecodes::Code bytecode = Bytecodes::_invokedynamic;
826 //TO DO: consider passing BCI to Java.
827 // int caller_bci = method(thread)->bci_from(bcp(thread));
829 // resolve method
830 CallInfo info;
831 constantPoolHandle pool(thread, method(thread)->constants());
832 int index = get_index_u4(thread, bytecode);
833 {
834 JvmtiHideSingleStepping jhss(thread);
835 LinkResolver::resolve_invoke(info, Handle(), pool,
836 index, bytecode, CHECK);
837 } // end JvmtiHideSingleStepping
839 ConstantPoolCacheEntry* cp_cache_entry = pool->invokedynamic_cp_cache_entry_at(index);
840 cp_cache_entry->set_dynamic_call(pool, info);
841 }
842 IRT_END
845 //------------------------------------------------------------------------------------------------------------------------
846 // Miscellaneous
849 nmethod* InterpreterRuntime::frequency_counter_overflow(JavaThread* thread, address branch_bcp) {
850 nmethod* nm = frequency_counter_overflow_inner(thread, branch_bcp);
851 assert(branch_bcp != NULL || nm == NULL, "always returns null for non OSR requests");
852 if (branch_bcp != NULL && nm != NULL) {
853 // This was a successful request for an OSR nmethod. Because
854 // frequency_counter_overflow_inner ends with a safepoint check,
855 // nm could have been unloaded so look it up again. It's unsafe
856 // to examine nm directly since it might have been freed and used
857 // for something else.
858 frame fr = thread->last_frame();
859 Method* method = fr.interpreter_frame_method();
860 int bci = method->bci_from(fr.interpreter_frame_bcp());
861 nm = method->lookup_osr_nmethod_for(bci, CompLevel_none, false);
862 }
863 #ifndef PRODUCT
864 if (TraceOnStackReplacement) {
865 if (nm != NULL) {
866 tty->print("OSR entry @ pc: " INTPTR_FORMAT ": ", nm->osr_entry());
867 nm->print();
868 }
869 }
870 #endif
871 return nm;
872 }
874 IRT_ENTRY(nmethod*,
875 InterpreterRuntime::frequency_counter_overflow_inner(JavaThread* thread, address branch_bcp))
876 // use UnlockFlagSaver to clear and restore the _do_not_unlock_if_synchronized
877 // flag, in case this method triggers classloading which will call into Java.
878 UnlockFlagSaver fs(thread);
880 frame fr = thread->last_frame();
881 assert(fr.is_interpreted_frame(), "must come from interpreter");
882 methodHandle method(thread, fr.interpreter_frame_method());
883 const int branch_bci = branch_bcp != NULL ? method->bci_from(branch_bcp) : InvocationEntryBci;
884 const int bci = branch_bcp != NULL ? method->bci_from(fr.interpreter_frame_bcp()) : InvocationEntryBci;
886 assert(!HAS_PENDING_EXCEPTION, "Should not have any exceptions pending");
887 nmethod* osr_nm = CompilationPolicy::policy()->event(method, method, branch_bci, bci, CompLevel_none, NULL, thread);
888 assert(!HAS_PENDING_EXCEPTION, "Event handler should not throw any exceptions");
890 if (osr_nm != NULL) {
891 // We may need to do on-stack replacement which requires that no
892 // monitors in the activation are biased because their
893 // BasicObjectLocks will need to migrate during OSR. Force
894 // unbiasing of all monitors in the activation now (even though
895 // the OSR nmethod might be invalidated) because we don't have a
896 // safepoint opportunity later once the migration begins.
897 if (UseBiasedLocking) {
898 ResourceMark rm;
899 GrowableArray<Handle>* objects_to_revoke = new GrowableArray<Handle>();
900 for( BasicObjectLock *kptr = fr.interpreter_frame_monitor_end();
901 kptr < fr.interpreter_frame_monitor_begin();
902 kptr = fr.next_monitor_in_interpreter_frame(kptr) ) {
903 if( kptr->obj() != NULL ) {
904 objects_to_revoke->append(Handle(THREAD, kptr->obj()));
905 }
906 }
907 BiasedLocking::revoke(objects_to_revoke);
908 }
909 }
910 return osr_nm;
911 IRT_END
913 IRT_LEAF(jint, InterpreterRuntime::bcp_to_di(Method* method, address cur_bcp))
914 assert(ProfileInterpreter, "must be profiling interpreter");
915 int bci = method->bci_from(cur_bcp);
916 MethodData* mdo = method->method_data();
917 if (mdo == NULL) return 0;
918 return mdo->bci_to_di(bci);
919 IRT_END
921 IRT_ENTRY(void, InterpreterRuntime::profile_method(JavaThread* thread))
922 // use UnlockFlagSaver to clear and restore the _do_not_unlock_if_synchronized
923 // flag, in case this method triggers classloading which will call into Java.
924 UnlockFlagSaver fs(thread);
926 assert(ProfileInterpreter, "must be profiling interpreter");
927 frame fr = thread->last_frame();
928 assert(fr.is_interpreted_frame(), "must come from interpreter");
929 methodHandle method(thread, fr.interpreter_frame_method());
930 Method::build_interpreter_method_data(method, THREAD);
931 if (HAS_PENDING_EXCEPTION) {
932 assert((PENDING_EXCEPTION->is_a(SystemDictionary::OutOfMemoryError_klass())), "we expect only an OOM error here");
933 CLEAR_PENDING_EXCEPTION;
934 // and fall through...
935 }
936 IRT_END
939 #ifdef ASSERT
940 IRT_LEAF(void, InterpreterRuntime::verify_mdp(Method* method, address bcp, address mdp))
941 assert(ProfileInterpreter, "must be profiling interpreter");
943 MethodData* mdo = method->method_data();
944 assert(mdo != NULL, "must not be null");
946 int bci = method->bci_from(bcp);
948 address mdp2 = mdo->bci_to_dp(bci);
949 if (mdp != mdp2) {
950 ResourceMark rm;
951 ResetNoHandleMark rnm; // In a LEAF entry.
952 HandleMark hm;
953 tty->print_cr("FAILED verify : actual mdp %p expected mdp %p @ bci %d", mdp, mdp2, bci);
954 int current_di = mdo->dp_to_di(mdp);
955 int expected_di = mdo->dp_to_di(mdp2);
956 tty->print_cr(" actual di %d expected di %d", current_di, expected_di);
957 int expected_approx_bci = mdo->data_at(expected_di)->bci();
958 int approx_bci = -1;
959 if (current_di >= 0) {
960 approx_bci = mdo->data_at(current_di)->bci();
961 }
962 tty->print_cr(" actual bci is %d expected bci %d", approx_bci, expected_approx_bci);
963 mdo->print_on(tty);
964 method->print_codes();
965 }
966 assert(mdp == mdp2, "wrong mdp");
967 IRT_END
968 #endif // ASSERT
970 IRT_ENTRY(void, InterpreterRuntime::update_mdp_for_ret(JavaThread* thread, int return_bci))
971 assert(ProfileInterpreter, "must be profiling interpreter");
972 ResourceMark rm(thread);
973 HandleMark hm(thread);
974 frame fr = thread->last_frame();
975 assert(fr.is_interpreted_frame(), "must come from interpreter");
976 MethodData* h_mdo = fr.interpreter_frame_method()->method_data();
978 // Grab a lock to ensure atomic access to setting the return bci and
979 // the displacement. This can block and GC, invalidating all naked oops.
980 MutexLocker ml(RetData_lock);
982 // ProfileData is essentially a wrapper around a derived oop, so we
983 // need to take the lock before making any ProfileData structures.
984 ProfileData* data = h_mdo->data_at(h_mdo->dp_to_di(fr.interpreter_frame_mdp()));
985 guarantee(data != NULL, "profile data must be valid");
986 RetData* rdata = data->as_RetData();
987 address new_mdp = rdata->fixup_ret(return_bci, h_mdo);
988 fr.interpreter_frame_set_mdp(new_mdp);
989 IRT_END
991 IRT_ENTRY(MethodCounters*, InterpreterRuntime::build_method_counters(JavaThread* thread, Method* m))
992 MethodCounters* mcs = Method::build_method_counters(m, thread);
993 if (HAS_PENDING_EXCEPTION) {
994 assert((PENDING_EXCEPTION->is_a(SystemDictionary::OutOfMemoryError_klass())), "we expect only an OOM error here");
995 CLEAR_PENDING_EXCEPTION;
996 }
997 return mcs;
998 IRT_END
1001 IRT_ENTRY(void, InterpreterRuntime::at_safepoint(JavaThread* thread))
1002 // We used to need an explict preserve_arguments here for invoke bytecodes. However,
1003 // stack traversal automatically takes care of preserving arguments for invoke, so
1004 // this is no longer needed.
1006 // IRT_END does an implicit safepoint check, hence we are guaranteed to block
1007 // if this is called during a safepoint
1009 if (JvmtiExport::should_post_single_step()) {
1010 // We are called during regular safepoints and when the VM is
1011 // single stepping. If any thread is marked for single stepping,
1012 // then we may have JVMTI work to do.
1013 JvmtiExport::at_single_stepping_point(thread, method(thread), bcp(thread));
1014 }
1015 IRT_END
1017 IRT_ENTRY(void, InterpreterRuntime::post_field_access(JavaThread *thread, oopDesc* obj,
1018 ConstantPoolCacheEntry *cp_entry))
1020 // check the access_flags for the field in the klass
1022 InstanceKlass* ik = InstanceKlass::cast(cp_entry->f1_as_klass());
1023 int index = cp_entry->field_index();
1024 if ((ik->field_access_flags(index) & JVM_ACC_FIELD_ACCESS_WATCHED) == 0) return;
1026 switch(cp_entry->flag_state()) {
1027 case btos: // fall through
1028 case ztos: // fall through
1029 case ctos: // fall through
1030 case stos: // fall through
1031 case itos: // fall through
1032 case ftos: // fall through
1033 case ltos: // fall through
1034 case dtos: // fall through
1035 case atos: break;
1036 default: ShouldNotReachHere(); return;
1037 }
1038 bool is_static = (obj == NULL);
1039 HandleMark hm(thread);
1041 Handle h_obj;
1042 if (!is_static) {
1043 // non-static field accessors have an object, but we need a handle
1044 h_obj = Handle(thread, obj);
1045 }
1046 instanceKlassHandle h_cp_entry_f1(thread, (Klass*)cp_entry->f1_as_klass());
1047 jfieldID fid = jfieldIDWorkaround::to_jfieldID(h_cp_entry_f1, cp_entry->f2_as_index(), is_static);
1048 JvmtiExport::post_field_access(thread, method(thread), bcp(thread), h_cp_entry_f1, h_obj, fid);
1049 IRT_END
1051 IRT_ENTRY(void, InterpreterRuntime::post_field_modification(JavaThread *thread,
1052 oopDesc* obj, ConstantPoolCacheEntry *cp_entry, jvalue *value))
1054 Klass* k = (Klass*)cp_entry->f1_as_klass();
1056 // check the access_flags for the field in the klass
1057 InstanceKlass* ik = InstanceKlass::cast(k);
1058 int index = cp_entry->field_index();
1059 // bail out if field modifications are not watched
1060 if ((ik->field_access_flags(index) & JVM_ACC_FIELD_MODIFICATION_WATCHED) == 0) return;
1062 char sig_type = '\0';
1064 switch(cp_entry->flag_state()) {
1065 case btos: sig_type = 'B'; break;
1066 case ztos: sig_type = 'Z'; break;
1067 case ctos: sig_type = 'C'; break;
1068 case stos: sig_type = 'S'; break;
1069 case itos: sig_type = 'I'; break;
1070 case ftos: sig_type = 'F'; break;
1071 case atos: sig_type = 'L'; break;
1072 case ltos: sig_type = 'J'; break;
1073 case dtos: sig_type = 'D'; break;
1074 default: ShouldNotReachHere(); return;
1075 }
1076 bool is_static = (obj == NULL);
1078 HandleMark hm(thread);
1079 instanceKlassHandle h_klass(thread, k);
1080 jfieldID fid = jfieldIDWorkaround::to_jfieldID(h_klass, cp_entry->f2_as_index(), is_static);
1081 jvalue fvalue;
1082 #ifdef _LP64
1083 fvalue = *value;
1084 #else
1085 // Long/double values are stored unaligned and also noncontiguously with
1086 // tagged stacks. We can't just do a simple assignment even in the non-
1087 // J/D cases because a C++ compiler is allowed to assume that a jvalue is
1088 // 8-byte aligned, and interpreter stack slots are only 4-byte aligned.
1089 // We assume that the two halves of longs/doubles are stored in interpreter
1090 // stack slots in platform-endian order.
1091 jlong_accessor u;
1092 jint* newval = (jint*)value;
1093 u.words[0] = newval[0];
1094 u.words[1] = newval[Interpreter::stackElementWords]; // skip if tag
1095 fvalue.j = u.long_value;
1096 #endif // _LP64
1098 Handle h_obj;
1099 if (!is_static) {
1100 // non-static field accessors have an object, but we need a handle
1101 h_obj = Handle(thread, obj);
1102 }
1104 JvmtiExport::post_raw_field_modification(thread, method(thread), bcp(thread), h_klass, h_obj,
1105 fid, sig_type, &fvalue);
1106 IRT_END
1108 IRT_ENTRY(void, InterpreterRuntime::post_method_entry(JavaThread *thread))
1109 JvmtiExport::post_method_entry(thread, InterpreterRuntime::method(thread), InterpreterRuntime::last_frame(thread));
1110 IRT_END
1113 IRT_ENTRY(void, InterpreterRuntime::post_method_exit(JavaThread *thread))
1114 JvmtiExport::post_method_exit(thread, InterpreterRuntime::method(thread), InterpreterRuntime::last_frame(thread));
1115 IRT_END
1117 IRT_LEAF(int, InterpreterRuntime::interpreter_contains(address pc))
1118 {
1119 return (Interpreter::contains(pc) ? 1 : 0);
1120 }
1121 IRT_END
1124 // Implementation of SignatureHandlerLibrary
1126 address SignatureHandlerLibrary::set_handler_blob() {
1127 BufferBlob* handler_blob = BufferBlob::create("native signature handlers", blob_size);
1128 if (handler_blob == NULL) {
1129 return NULL;
1130 }
1131 address handler = handler_blob->code_begin();
1132 _handler_blob = handler_blob;
1133 _handler = handler;
1134 return handler;
1135 }
1137 void SignatureHandlerLibrary::initialize() {
1138 if (_fingerprints != NULL) {
1139 return;
1140 }
1141 if (set_handler_blob() == NULL) {
1142 vm_exit_out_of_memory(blob_size, OOM_MALLOC_ERROR, "native signature handlers");
1143 }
1145 BufferBlob* bb = BufferBlob::create("Signature Handler Temp Buffer",
1146 SignatureHandlerLibrary::buffer_size);
1147 _buffer = bb->code_begin();
1149 _fingerprints = new(ResourceObj::C_HEAP, mtCode)GrowableArray<uint64_t>(32, true);
1150 _handlers = new(ResourceObj::C_HEAP, mtCode)GrowableArray<address>(32, true);
1151 }
1153 address SignatureHandlerLibrary::set_handler(CodeBuffer* buffer) {
1154 address handler = _handler;
1155 int insts_size = buffer->pure_insts_size();
1156 if (handler + insts_size > _handler_blob->code_end()) {
1157 // get a new handler blob
1158 handler = set_handler_blob();
1159 }
1160 if (handler != NULL) {
1161 memcpy(handler, buffer->insts_begin(), insts_size);
1162 pd_set_handler(handler);
1163 ICache::invalidate_range(handler, insts_size);
1164 _handler = handler + insts_size;
1165 }
1166 return handler;
1167 }
1169 void SignatureHandlerLibrary::add(methodHandle method) {
1170 if (method->signature_handler() == NULL) {
1171 // use slow signature handler if we can't do better
1172 int handler_index = -1;
1173 // check if we can use customized (fast) signature handler
1174 if (UseFastSignatureHandlers && method->size_of_parameters() <= Fingerprinter::max_size_of_parameters) {
1175 // use customized signature handler
1176 MutexLocker mu(SignatureHandlerLibrary_lock);
1177 // make sure data structure is initialized
1178 initialize();
1179 // lookup method signature's fingerprint
1180 uint64_t fingerprint = Fingerprinter(method).fingerprint();
1181 handler_index = _fingerprints->find(fingerprint);
1182 // create handler if necessary
1183 if (handler_index < 0) {
1184 ResourceMark rm;
1185 ptrdiff_t align_offset = (address)
1186 round_to((intptr_t)_buffer, CodeEntryAlignment) - (address)_buffer;
1187 CodeBuffer buffer((address)(_buffer + align_offset),
1188 SignatureHandlerLibrary::buffer_size - align_offset);
1189 InterpreterRuntime::SignatureHandlerGenerator(method, &buffer).generate(fingerprint);
1190 // copy into code heap
1191 address handler = set_handler(&buffer);
1192 if (handler == NULL) {
1193 // use slow signature handler
1194 } else {
1195 // debugging suppport
1196 if (PrintSignatureHandlers) {
1197 tty->cr();
1198 tty->print_cr("argument handler #%d for: %s %s (fingerprint = " UINT64_FORMAT ", %d bytes generated)",
1199 _handlers->length(),
1200 (method->is_static() ? "static" : "receiver"),
1201 method->name_and_sig_as_C_string(),
1202 fingerprint,
1203 buffer.insts_size());
1204 Disassembler::decode(handler, handler + buffer.insts_size());
1205 #ifndef PRODUCT
1206 tty->print_cr(" --- associated result handler ---");
1207 address rh_begin = Interpreter::result_handler(method()->result_type());
1208 address rh_end = rh_begin;
1209 while (*(int*)rh_end != 0) {
1210 rh_end += sizeof(int);
1211 }
1212 Disassembler::decode(rh_begin, rh_end);
1213 #endif
1214 }
1215 // add handler to library
1216 _fingerprints->append(fingerprint);
1217 _handlers->append(handler);
1218 // set handler index
1219 assert(_fingerprints->length() == _handlers->length(), "sanity check");
1220 handler_index = _fingerprints->length() - 1;
1221 }
1222 }
1223 // Set handler under SignatureHandlerLibrary_lock
1224 if (handler_index < 0) {
1225 // use generic signature handler
1226 method->set_signature_handler(Interpreter::slow_signature_handler());
1227 } else {
1228 // set handler
1229 method->set_signature_handler(_handlers->at(handler_index));
1230 }
1231 } else {
1232 CHECK_UNHANDLED_OOPS_ONLY(Thread::current()->clear_unhandled_oops());
1233 // use generic signature handler
1234 method->set_signature_handler(Interpreter::slow_signature_handler());
1235 }
1236 }
1237 #ifdef ASSERT
1238 int handler_index = -1;
1239 int fingerprint_index = -2;
1240 {
1241 // '_handlers' and '_fingerprints' are 'GrowableArray's and are NOT synchronized
1242 // in any way if accessed from multiple threads. To avoid races with another
1243 // thread which may change the arrays in the above, mutex protected block, we
1244 // have to protect this read access here with the same mutex as well!
1245 MutexLocker mu(SignatureHandlerLibrary_lock);
1246 if (_handlers != NULL) {
1247 handler_index = _handlers->find(method->signature_handler());
1248 fingerprint_index = _fingerprints->find(Fingerprinter(method).fingerprint());
1249 }
1250 }
1251 assert(method->signature_handler() == Interpreter::slow_signature_handler() ||
1252 handler_index == fingerprint_index, "sanity check");
1253 #endif // ASSERT
1254 }
1257 BufferBlob* SignatureHandlerLibrary::_handler_blob = NULL;
1258 address SignatureHandlerLibrary::_handler = NULL;
1259 GrowableArray<uint64_t>* SignatureHandlerLibrary::_fingerprints = NULL;
1260 GrowableArray<address>* SignatureHandlerLibrary::_handlers = NULL;
1261 address SignatureHandlerLibrary::_buffer = NULL;
1264 IRT_ENTRY(void, InterpreterRuntime::prepare_native_call(JavaThread* thread, Method* method))
1265 methodHandle m(thread, method);
1266 assert(m->is_native(), "sanity check");
1267 // lookup native function entry point if it doesn't exist
1268 bool in_base_library;
1269 if (!m->has_native_function()) {
1270 NativeLookup::lookup(m, in_base_library, CHECK);
1271 }
1272 // make sure signature handler is installed
1273 SignatureHandlerLibrary::add(m);
1274 // The interpreter entry point checks the signature handler first,
1275 // before trying to fetch the native entry point and klass mirror.
1276 // We must set the signature handler last, so that multiple processors
1277 // preparing the same method will be sure to see non-null entry & mirror.
1278 IRT_END
1280 #if defined(IA32) || defined(AMD64) || defined(ARM)
1281 IRT_LEAF(void, InterpreterRuntime::popframe_move_outgoing_args(JavaThread* thread, void* src_address, void* dest_address))
1282 if (src_address == dest_address) {
1283 return;
1284 }
1285 ResetNoHandleMark rnm; // In a LEAF entry.
1286 HandleMark hm;
1287 ResourceMark rm;
1288 frame fr = thread->last_frame();
1289 assert(fr.is_interpreted_frame(), "");
1290 jint bci = fr.interpreter_frame_bci();
1291 methodHandle mh(thread, fr.interpreter_frame_method());
1292 Bytecode_invoke invoke(mh, bci);
1293 ArgumentSizeComputer asc(invoke.signature());
1294 int size_of_arguments = (asc.size() + (invoke.has_receiver() ? 1 : 0)); // receiver
1295 Copy::conjoint_jbytes(src_address, dest_address,
1296 size_of_arguments * Interpreter::stackElementSize);
1297 IRT_END
1298 #endif
1300 #if INCLUDE_JVMTI
1301 // This is a support of the JVMTI PopFrame interface.
1302 // Make sure it is an invokestatic of a polymorphic intrinsic that has a member_name argument
1303 // and return it as a vm_result so that it can be reloaded in the list of invokestatic parameters.
1304 // The member_name argument is a saved reference (in local#0) to the member_name.
1305 // For backward compatibility with some JDK versions (7, 8) it can also be a direct method handle.
1306 // FIXME: remove DMH case after j.l.i.InvokerBytecodeGenerator code shape is updated.
1307 IRT_ENTRY(void, InterpreterRuntime::member_name_arg_or_null(JavaThread* thread, address member_name,
1308 Method* method, address bcp))
1309 Bytecodes::Code code = Bytecodes::code_at(method, bcp);
1310 if (code != Bytecodes::_invokestatic) {
1311 return;
1312 }
1313 ConstantPool* cpool = method->constants();
1314 int cp_index = Bytes::get_native_u2(bcp + 1) + ConstantPool::CPCACHE_INDEX_TAG;
1315 Symbol* cname = cpool->klass_name_at(cpool->klass_ref_index_at(cp_index));
1316 Symbol* mname = cpool->name_ref_at(cp_index);
1318 if (MethodHandles::has_member_arg(cname, mname)) {
1319 oop member_name_oop = (oop) member_name;
1320 if (java_lang_invoke_DirectMethodHandle::is_instance(member_name_oop)) {
1321 // FIXME: remove after j.l.i.InvokerBytecodeGenerator code shape is updated.
1322 member_name_oop = java_lang_invoke_DirectMethodHandle::member(member_name_oop);
1323 }
1324 thread->set_vm_result(member_name_oop);
1325 } else {
1326 thread->set_vm_result(NULL);
1327 }
1328 IRT_END
1329 #endif // INCLUDE_JVMTI