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 "code/codeCache.hpp"
28 #include "code/compiledIC.hpp"
29 #include "code/icBuffer.hpp"
30 #include "code/nmethod.hpp"
31 #include "code/vtableStubs.hpp"
32 #include "interpreter/interpreter.hpp"
33 #include "interpreter/linkResolver.hpp"
34 #include "memory/metadataFactory.hpp"
35 #include "memory/oopFactory.hpp"
36 #include "oops/method.hpp"
37 #include "oops/oop.inline.hpp"
38 #include "oops/symbol.hpp"
39 #include "runtime/icache.hpp"
40 #include "runtime/sharedRuntime.hpp"
41 #include "runtime/stubRoutines.hpp"
42 #include "utilities/events.hpp"
43
44
45 // Every time a compiled IC is changed or its type is being accessed,
46 // either the CompiledIC_lock must be set or we must be at a safe point.
47
48 //-----------------------------------------------------------------------------
49 // Low-level access to an inline cache. Private, since they might not be
50 // MT-safe to use.
51
52 void* CompiledIC::cached_value() const {
53 assert (CompiledIC_lock->is_locked() || SafepointSynchronize::is_at_safepoint(), "");
54 assert (!is_optimized(), "an optimized virtual call does not have a cached metadata");
55
56 if (!is_in_transition_state()) {
57 void* data = (void*)_value->data();
58 // If we let the metadata value here be initialized to zero...
59 assert(data != NULL || Universe::non_oop_word() == NULL,
60 "no raw nulls in CompiledIC metadatas, because of patching races");
61 return (data == (void*)Universe::non_oop_word()) ? NULL : data;
62 } else {
63 return InlineCacheBuffer::cached_value_for((CompiledIC *)this);
64 }
65 }
66
67
68 void CompiledIC::internal_set_ic_destination(address entry_point, bool is_icstub, void* cache, bool is_icholder) {
69 assert(entry_point != NULL, "must set legal entry point");
70 assert(CompiledIC_lock->is_locked() || SafepointSynchronize::is_at_safepoint(), "");
71 assert (!is_optimized() || cache == NULL, "an optimized virtual call does not have a cached metadata");
72 assert (cache == NULL || cache != (Metadata*)badOopVal, "invalid metadata");
73
74 assert(!is_icholder || is_icholder_entry(entry_point), "must be");
75
76 // Don't use ic_destination for this test since that forwards
77 // through ICBuffer instead of returning the actual current state of
78 // the CompiledIC.
79 if (is_icholder_entry(_ic_call->destination())) {
80 // When patching for the ICStub case the cached value isn't
81 // overwritten until the ICStub copied into the CompiledIC during
82 // the next safepoint. Make sure that the CompiledICHolder* is
83 // marked for release at this point since it won't be identifiable
84 // once the entry point is overwritten.
85 InlineCacheBuffer::queue_for_release((CompiledICHolder*)_value->data());
86 }
87
88 if (TraceCompiledIC) {
89 tty->print(" ");
90 print_compiled_ic();
91 tty->print(" changing destination to " INTPTR_FORMAT, entry_point);
92 if (!is_optimized()) {
93 tty->print(" changing cached %s to " INTPTR_FORMAT, is_icholder ? "icholder" : "metadata", (address)cache);
94 }
95 if (is_icstub) {
96 tty->print(" (icstub)");
97 }
98 tty->cr();
99 }
100
101 {
102 MutexLockerEx pl(Patching_lock, Mutex::_no_safepoint_check_flag);
103 #ifdef ASSERT
104 CodeBlob* cb = CodeCache::find_blob_unsafe(_ic_call);
105 assert(cb != NULL && cb->is_nmethod(), "must be nmethod");
106 #endif
107 _ic_call->set_destination_mt_safe(entry_point);
108 }
109
110 if (is_optimized() || is_icstub) {
111 // Optimized call sites don't have a cache value and ICStub call
112 // sites only change the entry point. Changing the value in that
113 // case could lead to MT safety issues.
114 assert(cache == NULL, "must be null");
115 return;
116 }
117
118 if (cache == NULL) cache = (void*)Universe::non_oop_word();
119
120 _value->set_data((intptr_t)cache);
121 }
122
123
124 void CompiledIC::set_ic_destination(ICStub* stub) {
125 internal_set_ic_destination(stub->code_begin(), true, NULL, false);
126 }
127
128
129
130 address CompiledIC::ic_destination() const {
131 assert (CompiledIC_lock->is_locked() || SafepointSynchronize::is_at_safepoint(), "");
132 if (!is_in_transition_state()) {
133 return _ic_call->destination();
134 } else {
135 return InlineCacheBuffer::ic_destination_for((CompiledIC *)this);
136 }
137 }
138
139
140 bool CompiledIC::is_in_transition_state() const {
141 assert (CompiledIC_lock->is_locked() || SafepointSynchronize::is_at_safepoint(), "");
142 return InlineCacheBuffer::contains(_ic_call->destination());
143 }
144
145
146 bool CompiledIC::is_icholder_call() const {
147 assert (CompiledIC_lock->is_locked() || SafepointSynchronize::is_at_safepoint(), "");
148 return !_is_optimized && is_icholder_entry(ic_destination());
149 }
150
151 // Returns native address of 'call' instruction in inline-cache. Used by
152 // the InlineCacheBuffer when it needs to find the stub.
153 address CompiledIC::stub_address() const {
154 assert(is_in_transition_state(), "should only be called when we are in a transition state");
155 return _ic_call->destination();
156 }
157
158
159 //-----------------------------------------------------------------------------
160 // High-level access to an inline cache. Guaranteed to be MT-safe.
161
162
163 void CompiledIC::set_to_megamorphic(CallInfo* call_info, Bytecodes::Code bytecode, TRAPS) {
164 assert(CompiledIC_lock->is_locked() || SafepointSynchronize::is_at_safepoint(), "");
165 assert(!is_optimized(), "cannot set an optimized virtual call to megamorphic");
166 assert(is_call_to_compiled() || is_call_to_interpreted(), "going directly to megamorphic?");
167
168 address entry;
169 if (call_info->call_kind() == CallInfo::itable_call) {
170 assert(bytecode == Bytecodes::_invokeinterface, "");
171 int itable_index = call_info->itable_index();
172 entry = VtableStubs::find_itable_stub(itable_index);
173 #ifdef ASSERT
174 assert(entry != NULL, "entry not computed");
175 int index = call_info->resolved_method()->itable_index();
176 assert(index == itable_index, "CallInfo pre-computes this");
177 #endif //ASSERT
178 InstanceKlass* k = call_info->resolved_method()->method_holder();
179 assert(k->verify_itable_index(itable_index), "sanity check");
180 InlineCacheBuffer::create_transition_stub(this, k, entry);
181 } else {
182 assert(call_info->call_kind() == CallInfo::vtable_call, "either itable or vtable");
183 // Can be different than selected_method->vtable_index(), due to package-private etc.
184 int vtable_index = call_info->vtable_index();
185 assert(call_info->resolved_klass()->verify_vtable_index(vtable_index), "sanity check");
186 entry = VtableStubs::find_vtable_stub(vtable_index);
187 InlineCacheBuffer::create_transition_stub(this, NULL, entry);
188 }
189
190 if (TraceICs) {
191 ResourceMark rm;
192 tty->print_cr ("IC@" INTPTR_FORMAT ": to megamorphic %s entry: " INTPTR_FORMAT,
193 instruction_address(), call_info->selected_method()->print_value_string(), entry);
194 }
195
196 // We can't check this anymore. With lazy deopt we could have already
197 // cleaned this IC entry before we even return. This is possible if
198 // we ran out of space in the inline cache buffer trying to do the
199 // set_next and we safepointed to free up space. This is a benign
200 // race because the IC entry was complete when we safepointed so
201 // cleaning it immediately is harmless.
202 // assert(is_megamorphic(), "sanity check");
203 }
204
205
206 // true if destination is megamorphic stub
207 bool CompiledIC::is_megamorphic() const {
208 assert(CompiledIC_lock->is_locked() || SafepointSynchronize::is_at_safepoint(), "");
209 assert(!is_optimized(), "an optimized call cannot be megamorphic");
210
211 // Cannot rely on cached_value. It is either an interface or a method.
212 return VtableStubs::is_entry_point(ic_destination());
213 }
214
215 bool CompiledIC::is_call_to_compiled() const {
216 assert (CompiledIC_lock->is_locked() || SafepointSynchronize::is_at_safepoint(), "");
217
218 // Use unsafe, since an inline cache might point to a zombie method. However, the zombie
219 // method is guaranteed to still exist, since we only remove methods after all inline caches
220 // has been cleaned up
221 CodeBlob* cb = CodeCache::find_blob_unsafe(ic_destination());
222 bool is_monomorphic = (cb != NULL && cb->is_nmethod());
223 // Check that the cached_value is a klass for non-optimized monomorphic calls
224 // This assertion is invalid for compiler1: a call that does not look optimized (no static stub) can be used
225 // for calling directly to vep without using the inline cache (i.e., cached_value == NULL)
226 #ifdef ASSERT
227 CodeBlob* caller = CodeCache::find_blob_unsafe(instruction_address());
228 bool is_c1_method = caller->is_compiled_by_c1();
229 assert( is_c1_method ||
230 !is_monomorphic ||
231 is_optimized() ||
232 (cached_metadata() != NULL && cached_metadata()->is_klass()), "sanity check");
233 #endif // ASSERT
234 return is_monomorphic;
235 }
236
237
238 bool CompiledIC::is_call_to_interpreted() const {
239 assert (CompiledIC_lock->is_locked() || SafepointSynchronize::is_at_safepoint(), "");
240 // Call to interpreter if destination is either calling to a stub (if it
241 // is optimized), or calling to an I2C blob
242 bool is_call_to_interpreted = false;
243 if (!is_optimized()) {
244 // must use unsafe because the destination can be a zombie (and we're cleaning)
245 // and the print_compiled_ic code wants to know if site (in the non-zombie)
246 // is to the interpreter.
247 CodeBlob* cb = CodeCache::find_blob_unsafe(ic_destination());
248 is_call_to_interpreted = (cb != NULL && cb->is_adapter_blob());
249 assert(!is_call_to_interpreted || (is_icholder_call() && cached_icholder() != NULL), "sanity check");
250 } else {
251 // Check if we are calling into our own codeblob (i.e., to a stub)
252 CodeBlob* cb = CodeCache::find_blob(_ic_call->instruction_address());
253 address dest = ic_destination();
254 #ifdef ASSERT
255 {
256 CodeBlob* db = CodeCache::find_blob_unsafe(dest);
257 assert(!db->is_adapter_blob(), "must use stub!");
258 }
259 #endif /* ASSERT */
260 is_call_to_interpreted = cb->contains(dest);
261 }
262 return is_call_to_interpreted;
263 }
264
265
266 void CompiledIC::set_to_clean() {
267 assert(SafepointSynchronize::is_at_safepoint() || CompiledIC_lock->is_locked() , "MT-unsafe call");
268 if (TraceInlineCacheClearing || TraceICs) {
269 tty->print_cr("IC@" INTPTR_FORMAT ": set to clean", instruction_address());
270 print();
271 }
272
273 address entry;
274 if (is_optimized()) {
275 entry = SharedRuntime::get_resolve_opt_virtual_call_stub();
276 } else {
277 entry = SharedRuntime::get_resolve_virtual_call_stub();
278 }
279
280 // A zombie transition will always be safe, since the metadata has already been set to NULL, so
281 // we only need to patch the destination
282 bool safe_transition = is_optimized() || SafepointSynchronize::is_at_safepoint();
283
284 if (safe_transition) {
285 // Kill any leftover stub we might have too
286 if (is_in_transition_state()) {
287 ICStub* old_stub = ICStub_from_destination_address(stub_address());
288 old_stub->clear();
289 }
290 if (is_optimized()) {
291 set_ic_destination(entry);
292 } else {
293 set_ic_destination_and_value(entry, (void*)NULL);
294 }
295 } else {
296 // Unsafe transition - create stub.
297 InlineCacheBuffer::create_transition_stub(this, NULL, entry);
298 }
299 // We can't check this anymore. With lazy deopt we could have already
300 // cleaned this IC entry before we even return. This is possible if
301 // we ran out of space in the inline cache buffer trying to do the
302 // set_next and we safepointed to free up space. This is a benign
303 // race because the IC entry was complete when we safepointed so
304 // cleaning it immediately is harmless.
305 // assert(is_clean(), "sanity check");
306 }
307
308
309 bool CompiledIC::is_clean() const {
310 assert (CompiledIC_lock->is_locked() || SafepointSynchronize::is_at_safepoint(), "");
311 bool is_clean = false;
312 address dest = ic_destination();
313 is_clean = dest == SharedRuntime::get_resolve_opt_virtual_call_stub() ||
314 dest == SharedRuntime::get_resolve_virtual_call_stub();
315 assert(!is_clean || is_optimized() || cached_value() == NULL, "sanity check");
316 return is_clean;
317 }
318
319
320 void CompiledIC::set_to_monomorphic(CompiledICInfo& info) {
321 assert (CompiledIC_lock->is_locked() || SafepointSynchronize::is_at_safepoint(), "");
322 // Updating a cache to the wrong entry can cause bugs that are very hard
323 // to track down - if cache entry gets invalid - we just clean it. In
324 // this way it is always the same code path that is responsible for
325 // updating and resolving an inline cache
326 //
327 // The above is no longer true. SharedRuntime::fixup_callers_callsite will change optimized
328 // callsites. In addition ic_miss code will update a site to monomorphic if it determines
329 // that an monomorphic call to the interpreter can now be monomorphic to compiled code.
330 //
331 // In both of these cases the only thing being modifed is the jump/call target and these
332 // transitions are mt_safe
333
334 Thread *thread = Thread::current();
335 if (info.to_interpreter()) {
336 // Call to interpreter
337 if (info.is_optimized() && is_optimized()) {
338 assert(is_clean(), "unsafe IC path");
339 MutexLockerEx pl(Patching_lock, Mutex::_no_safepoint_check_flag);
340 // the call analysis (callee structure) specifies that the call is optimized
341 // (either because of CHA or the static target is final)
342 // At code generation time, this call has been emitted as static call
343 // Call via stub
344 assert(info.cached_metadata() != NULL && info.cached_metadata()->is_method(), "sanity check");
345 CompiledStaticCall* csc = compiledStaticCall_at(instruction_address());
346 methodHandle method (thread, (Method*)info.cached_metadata());
347 csc->set_to_interpreted(method, info.entry());
348 if (TraceICs) {
349 ResourceMark rm(thread);
350 tty->print_cr ("IC@" INTPTR_FORMAT ": monomorphic to interpreter: %s",
351 instruction_address(),
352 method->print_value_string());
353 }
354 } else {
355 // Call via method-klass-holder
356 InlineCacheBuffer::create_transition_stub(this, info.claim_cached_icholder(), info.entry());
357 if (TraceICs) {
358 ResourceMark rm(thread);
359 tty->print_cr ("IC@" INTPTR_FORMAT ": monomorphic to interpreter via icholder ", instruction_address());
360 }
361 }
362 } else {
363 // Call to compiled code
364 bool static_bound = info.is_optimized() || (info.cached_metadata() == NULL);
365 #ifdef ASSERT
366 CodeBlob* cb = CodeCache::find_blob_unsafe(info.entry());
367 assert (cb->is_nmethod(), "must be compiled!");
368 #endif /* ASSERT */
369
370 // This is MT safe if we come from a clean-cache and go through a
371 // non-verified entry point
372 bool safe = SafepointSynchronize::is_at_safepoint() ||
373 (!is_in_transition_state() && (info.is_optimized() || static_bound || is_clean()));
374
375 if (!safe) {
376 InlineCacheBuffer::create_transition_stub(this, info.cached_metadata(), info.entry());
377 } else {
378 if (is_optimized()) {
379 set_ic_destination(info.entry());
380 } else {
381 set_ic_destination_and_value(info.entry(), info.cached_metadata());
382 }
383 }
384
385 if (TraceICs) {
386 ResourceMark rm(thread);
387 assert(info.cached_metadata() == NULL || info.cached_metadata()->is_klass(), "must be");
388 tty->print_cr ("IC@" INTPTR_FORMAT ": monomorphic to compiled (rcvr klass) %s: %s",
389 instruction_address(),
390 ((Klass*)info.cached_metadata())->print_value_string(),
391 (safe) ? "" : "via stub");
392 }
393 }
394 // We can't check this anymore. With lazy deopt we could have already
395 // cleaned this IC entry before we even return. This is possible if
396 // we ran out of space in the inline cache buffer trying to do the
397 // set_next and we safepointed to free up space. This is a benign
398 // race because the IC entry was complete when we safepointed so
399 // cleaning it immediately is harmless.
400 // assert(is_call_to_compiled() || is_call_to_interpreted(), "sanity check");
401 }
402
403
404 // is_optimized: Compiler has generated an optimized call (i.e., no inline
405 // cache) static_bound: The call can be static bound (i.e, no need to use
406 // inline cache)
407 void CompiledIC::compute_monomorphic_entry(methodHandle method,
408 KlassHandle receiver_klass,
409 bool is_optimized,
410 bool static_bound,
411 CompiledICInfo& info,
412 TRAPS) {
413 nmethod* method_code = method->code();
414 address entry = NULL;
415 if (method_code != NULL) {
416 // Call to compiled code
417 if (static_bound || is_optimized) {
418 entry = method_code->verified_entry_point();
419 } else {
420 entry = method_code->entry_point();
421 }
422 }
423 if (entry != NULL) {
424 // Call to compiled code
425 info.set_compiled_entry(entry, (static_bound || is_optimized) ? NULL : receiver_klass(), is_optimized);
426 } else {
427 // Note: the following problem exists with Compiler1:
428 // - at compile time we may or may not know if the destination is final
429 // - if we know that the destination is final, we will emit an optimized
430 // virtual call (no inline cache), and need a Method* to make a call
431 // to the interpreter
432 // - if we do not know if the destination is final, we emit a standard
433 // virtual call, and use CompiledICHolder to call interpreted code
434 // (no static call stub has been generated)
435 // However in that case we will now notice it is static_bound
436 // and convert the call into what looks to be an optimized
437 // virtual call. This causes problems in verifying the IC because
438 // it look vanilla but is optimized. Code in is_call_to_interpreted
439 // is aware of this and weakens its asserts.
440
441 // static_bound should imply is_optimized -- otherwise we have a
442 // performance bug (statically-bindable method is called via
443 // dynamically-dispatched call note: the reverse implication isn't
444 // necessarily true -- the call may have been optimized based on compiler
445 // analysis (static_bound is only based on "final" etc.)
446 #ifdef COMPILER2
447 #ifdef TIERED
448 #if defined(ASSERT)
449 // can't check the assert because we don't have the CompiledIC with which to
450 // find the address if the call instruction.
451 //
452 // CodeBlob* cb = find_blob_unsafe(instruction_address());
453 // assert(cb->is_compiled_by_c1() || !static_bound || is_optimized, "static_bound should imply is_optimized");
454 #endif // ASSERT
455 #else
456 assert(!static_bound || is_optimized, "static_bound should imply is_optimized");
457 #endif // TIERED
458 #endif // COMPILER2
459 if (is_optimized) {
460 // Use stub entry
461 info.set_interpreter_entry(method()->get_c2i_entry(), method());
462 } else {
463 // Use icholder entry
464 CompiledICHolder* holder = new CompiledICHolder(method(), receiver_klass());
465 info.set_icholder_entry(method()->get_c2i_unverified_entry(), holder);
466 }
467 }
468 assert(info.is_optimized() == is_optimized, "must agree");
469 }
470
471
472 bool CompiledIC::is_icholder_entry(address entry) {
473 CodeBlob* cb = CodeCache::find_blob_unsafe(entry);
474 return (cb != NULL && cb->is_adapter_blob());
475 }
476
477 // ----------------------------------------------------------------------------
478
479 void CompiledStaticCall::set_to_clean() {
480 assert (CompiledIC_lock->is_locked() || SafepointSynchronize::is_at_safepoint(), "mt unsafe call");
481 // Reset call site
482 MutexLockerEx pl(Patching_lock, Mutex::_no_safepoint_check_flag);
483 #ifdef ASSERT
484 CodeBlob* cb = CodeCache::find_blob_unsafe(this);
485 assert(cb != NULL && cb->is_nmethod(), "must be nmethod");
486 #endif
487 set_destination_mt_safe(SharedRuntime::get_resolve_static_call_stub());
488
489 // Do not reset stub here: It is too expensive to call find_stub.
490 // Instead, rely on caller (nmethod::clear_inline_caches) to clear
491 // both the call and its stub.
492 }
493
494
495 bool CompiledStaticCall::is_clean() const {
496 return destination() == SharedRuntime::get_resolve_static_call_stub();
497 }
498
499 bool CompiledStaticCall::is_call_to_compiled() const {
500 return CodeCache::contains(destination());
501 }
502
503
504 bool CompiledStaticCall::is_call_to_interpreted() const {
505 // It is a call to interpreted, if it calls to a stub. Hence, the destination
506 // must be in the stub part of the nmethod that contains the call
507 nmethod* nm = CodeCache::find_nmethod(instruction_address());
508 return nm->stub_contains(destination());
509 }
510
511 void CompiledStaticCall::set(const StaticCallInfo& info) {
512 assert (CompiledIC_lock->is_locked() || SafepointSynchronize::is_at_safepoint(), "mt unsafe call");
513 MutexLockerEx pl(Patching_lock, Mutex::_no_safepoint_check_flag);
514 // Updating a cache to the wrong entry can cause bugs that are very hard
515 // to track down - if cache entry gets invalid - we just clean it. In
516 // this way it is always the same code path that is responsible for
517 // updating and resolving an inline cache
518 assert(is_clean(), "do not update a call entry - use clean");
519
520 if (info._to_interpreter) {
521 // Call to interpreted code
522 set_to_interpreted(info.callee(), info.entry());
523 } else {
524 if (TraceICs) {
525 ResourceMark rm;
526 tty->print_cr("CompiledStaticCall@" INTPTR_FORMAT ": set_to_compiled " INTPTR_FORMAT,
527 instruction_address(),
528 info.entry());
529 }
530 // Call to compiled code
531 assert (CodeCache::contains(info.entry()), "wrong entry point");
532 set_destination_mt_safe(info.entry());
533 }
534 }
535
536
537 // Compute settings for a CompiledStaticCall. Since we might have to set
538 // the stub when calling to the interpreter, we need to return arguments.
539 void CompiledStaticCall::compute_entry(methodHandle m, StaticCallInfo& info) {
540 nmethod* m_code = m->code();
541 info._callee = m;
542 if (m_code != NULL) {
543 info._to_interpreter = false;
544 info._entry = m_code->verified_entry_point();
545 } else {
546 // Callee is interpreted code. In any case entering the interpreter
547 // puts a converter-frame on the stack to save arguments.
548 info._to_interpreter = true;
549 info._entry = m()->get_c2i_entry();
550 }
551 }
552
553 address CompiledStaticCall::find_stub() {
554 // Find reloc. information containing this call-site
555 RelocIterator iter((nmethod*)NULL, instruction_address());
556 while (iter.next()) {
557 if (iter.addr() == instruction_address()) {
558 switch(iter.type()) {
559 case relocInfo::static_call_type:
560 return iter.static_call_reloc()->static_stub();
561 // We check here for opt_virtual_call_type, since we reuse the code
562 // from the CompiledIC implementation
563 case relocInfo::opt_virtual_call_type:
564 return iter.opt_virtual_call_reloc()->static_stub();
565 case relocInfo::poll_type:
566 case relocInfo::poll_return_type: // A safepoint can't overlap a call.
567 default:
568 ShouldNotReachHere();
569 }
570 }
571 }
572 return NULL;
573 }
574
575
576 //-----------------------------------------------------------------------------
577 // Non-product mode code
578 #ifndef PRODUCT
579
580 void CompiledIC::verify() {
581 // make sure code pattern is actually a call imm32 instruction
582 _ic_call->verify();
583 if (os::is_MP()) {
584 _ic_call->verify_alignment();
585 }
586 assert(is_clean() || is_call_to_compiled() || is_call_to_interpreted()
587 || is_optimized() || is_megamorphic(), "sanity check");
588 }
589
590 void CompiledIC::print() {
591 print_compiled_ic();
592 tty->cr();
593 }
594
595 void CompiledIC::print_compiled_ic() {
596 tty->print("Inline cache at " INTPTR_FORMAT ", calling %s " INTPTR_FORMAT " cached_value " INTPTR_FORMAT,
597 instruction_address(), is_call_to_interpreted() ? "interpreted " : "", ic_destination(), is_optimized() ? NULL : cached_value());
598 }
599
600 void CompiledStaticCall::print() {
601 tty->print("static call at " INTPTR_FORMAT " -> ", instruction_address());
602 if (is_clean()) {
603 tty->print("clean");
604 } else if (is_call_to_compiled()) {
605 tty->print("compiled");
606 } else if (is_call_to_interpreted()) {
607 tty->print("interpreted");
608 }
609 tty->cr();
610 }
611
612 #endif // !PRODUCT