1 /*
2 * Copyright (c) 1997, 2012, 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 bool CompiledIC::set_to_megamorphic(CallInfo* call_info, Bytecodes::Code bytecode, TRAPS) {
164 methodHandle method = call_info->selected_method();
165 bool is_invoke_interface = (bytecode == Bytecodes::_invokeinterface && !call_info->has_vtable_index());
166 assert(CompiledIC_lock->is_locked() || SafepointSynchronize::is_at_safepoint(), "");
167 assert(!is_optimized(), "cannot set an optimized virtual call to megamorphic");
168 assert(is_call_to_compiled() || is_call_to_interpreted(), "going directly to megamorphic?");
169
170 address entry;
171 if (is_invoke_interface) {
172 int index = klassItable::compute_itable_index(call_info->resolved_method()());
173 entry = VtableStubs::create_stub(false, index, method());
174 if (entry == NULL) {
175 return false;
176 }
177 InstanceKlass* k = call_info->resolved_method()->method_holder();
178 assert(k->is_interface(), "sanity check");
179 InlineCacheBuffer::create_transition_stub(this, k, entry);
180 } else {
181 // Can be different than method->vtable_index(), due to package-private etc.
182 int vtable_index = call_info->vtable_index();
183 entry = VtableStubs::create_stub(true, vtable_index, method());
184 if (entry == NULL) {
185 return false;
186 }
187 InlineCacheBuffer::create_transition_stub(this, method(), 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(), 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 return true;
204 }
205
206
207 // true if destination is megamorphic stub
208 bool CompiledIC::is_megamorphic() const {
209 assert(CompiledIC_lock->is_locked() || SafepointSynchronize::is_at_safepoint(), "");
210 assert(!is_optimized(), "an optimized call cannot be megamorphic");
211
212 // Cannot rely on cached_value. It is either an interface or a method.
213 return VtableStubs::is_entry_point(ic_destination());
214 }
215
216 bool CompiledIC::is_call_to_compiled() const {
217 assert (CompiledIC_lock->is_locked() || SafepointSynchronize::is_at_safepoint(), "");
218
219 // Use unsafe, since an inline cache might point to a zombie method. However, the zombie
220 // method is guaranteed to still exist, since we only remove methods after all inline caches
221 // has been cleaned up
222 CodeBlob* cb = CodeCache::find_blob_unsafe(ic_destination());
223 bool is_monomorphic = (cb != NULL && cb->is_nmethod());
224 // Check that the cached_value is a klass for non-optimized monomorphic calls
225 // This assertion is invalid for compiler1: a call that does not look optimized (no static stub) can be used
226 // for calling directly to vep without using the inline cache (i.e., cached_value == NULL)
227 #ifdef ASSERT
228 CodeBlob* caller = CodeCache::find_blob_unsafe(instruction_address());
229 bool is_c1_method = caller->is_compiled_by_c1();
230 assert( is_c1_method ||
231 !is_monomorphic ||
232 is_optimized() ||
233 (cached_metadata() != NULL && cached_metadata()->is_klass()), "sanity check");
234 #endif // ASSERT
235 return is_monomorphic;
236 }
237
238
239 bool CompiledIC::is_call_to_interpreted() const {
240 assert (CompiledIC_lock->is_locked() || SafepointSynchronize::is_at_safepoint(), "");
241 // Call to interpreter if destination is either calling to a stub (if it
242 // is optimized), or calling to an I2C blob
243 bool is_call_to_interpreted = false;
244 if (!is_optimized()) {
245 // must use unsafe because the destination can be a zombie (and we're cleaning)
246 // and the print_compiled_ic code wants to know if site (in the non-zombie)
247 // is to the interpreter.
248 CodeBlob* cb = CodeCache::find_blob_unsafe(ic_destination());
249 is_call_to_interpreted = (cb != NULL && cb->is_adapter_blob());
250 assert(!is_call_to_interpreted || (is_icholder_call() && cached_icholder() != NULL), "sanity check");
251 } else {
252 // Check if we are calling into our own codeblob (i.e., to a stub)
253 CodeBlob* cb = CodeCache::find_blob(_ic_call->instruction_address());
254 address dest = ic_destination();
255 #ifdef ASSERT
256 {
257 CodeBlob* db = CodeCache::find_blob_unsafe(dest);
258 assert(!db->is_adapter_blob(), "must use stub!");
259 }
260 #endif /* ASSERT */
261 is_call_to_interpreted = cb->contains(dest);
262 }
263 return is_call_to_interpreted;
264 }
265
266
267 void CompiledIC::set_to_clean() {
268 assert(SafepointSynchronize::is_at_safepoint() || CompiledIC_lock->is_locked() , "MT-unsafe call");
269 if (TraceInlineCacheClearing || TraceICs) {
270 tty->print_cr("IC@" INTPTR_FORMAT ": set to clean", instruction_address());
271 print();
272 }
273
274 address entry;
275 if (is_optimized()) {
276 entry = SharedRuntime::get_resolve_opt_virtual_call_stub();
277 } else {
278 entry = SharedRuntime::get_resolve_virtual_call_stub();
279 }
280
281 // A zombie transition will always be safe, since the metadata has already been set to NULL, so
282 // we only need to patch the destination
283 bool safe_transition = is_optimized() || SafepointSynchronize::is_at_safepoint();
284
285 if (safe_transition) {
286 // Kill any leftover stub we might have too
287 if (is_in_transition_state()) {
288 ICStub* old_stub = ICStub_from_destination_address(stub_address());
289 old_stub->clear();
290 }
291 if (is_optimized()) {
292 set_ic_destination(entry);
293 } else {
294 set_ic_destination_and_value(entry, (void*)NULL);
295 }
296 } else {
297 // Unsafe transition - create stub.
298 InlineCacheBuffer::create_transition_stub(this, NULL, entry);
299 }
300 // We can't check this anymore. With lazy deopt we could have already
301 // cleaned this IC entry before we even return. This is possible if
302 // we ran out of space in the inline cache buffer trying to do the
303 // set_next and we safepointed to free up space. This is a benign
304 // race because the IC entry was complete when we safepointed so
305 // cleaning it immediately is harmless.
306 // assert(is_clean(), "sanity check");
307 }
308
309
310 bool CompiledIC::is_clean() const {
311 assert (CompiledIC_lock->is_locked() || SafepointSynchronize::is_at_safepoint(), "");
312 bool is_clean = false;
313 address dest = ic_destination();
314 is_clean = dest == SharedRuntime::get_resolve_opt_virtual_call_stub() ||
315 dest == SharedRuntime::get_resolve_virtual_call_stub();
316 assert(!is_clean || is_optimized() || cached_value() == NULL, "sanity check");
317 return is_clean;
318 }
319
320
321 void CompiledIC::set_to_monomorphic(CompiledICInfo& info) {
322 assert (CompiledIC_lock->is_locked() || SafepointSynchronize::is_at_safepoint(), "");
323 // Updating a cache to the wrong entry can cause bugs that are very hard
324 // to track down - if cache entry gets invalid - we just clean it. In
325 // this way it is always the same code path that is responsible for
326 // updating and resolving an inline cache
327 //
328 // The above is no longer true. SharedRuntime::fixup_callers_callsite will change optimized
329 // callsites. In addition ic_miss code will update a site to monomorphic if it determines
330 // that an monomorphic call to the interpreter can now be monomorphic to compiled code.
331 //
332 // In both of these cases the only thing being modifed is the jump/call target and these
333 // transitions are mt_safe
334
335 Thread *thread = Thread::current();
336 if (info.to_interpreter()) {
337 // Call to interpreter
338 if (info.is_optimized() && is_optimized()) {
339 assert(is_clean(), "unsafe IC path");
340 MutexLockerEx pl(Patching_lock, Mutex::_no_safepoint_check_flag);
341 // the call analysis (callee structure) specifies that the call is optimized
342 // (either because of CHA or the static target is final)
343 // At code generation time, this call has been emitted as static call
344 // Call via stub
345 assert(info.cached_metadata() != NULL && info.cached_metadata()->is_method(), "sanity check");
346 CompiledStaticCall* csc = compiledStaticCall_at(instruction_address());
347 methodHandle method (thread, (Method*)info.cached_metadata());
348 csc->set_to_interpreted(method, info.entry());
349 if (TraceICs) {
350 ResourceMark rm(thread);
351 tty->print_cr ("IC@" INTPTR_FORMAT ": monomorphic to interpreter: %s",
352 instruction_address(),
353 method->print_value_string());
354 }
355 } else {
356 // Call via method-klass-holder
357 InlineCacheBuffer::create_transition_stub(this, info.claim_cached_icholder(), info.entry());
358 if (TraceICs) {
359 ResourceMark rm(thread);
360 tty->print_cr ("IC@" INTPTR_FORMAT ": monomorphic to interpreter via icholder ", instruction_address());
361 }
362 }
363 } else {
364 // Call to compiled code
365 bool static_bound = info.is_optimized() || (info.cached_metadata() == NULL);
366 #ifdef ASSERT
367 CodeBlob* cb = CodeCache::find_blob_unsafe(info.entry());
368 assert (cb->is_nmethod(), "must be compiled!");
369 #endif /* ASSERT */
370
371 // This is MT safe if we come from a clean-cache and go through a
372 // non-verified entry point
373 bool safe = SafepointSynchronize::is_at_safepoint() ||
374 (!is_in_transition_state() && (info.is_optimized() || static_bound || is_clean()));
375
376 if (!safe) {
377 InlineCacheBuffer::create_transition_stub(this, info.cached_metadata(), info.entry());
378 } else {
379 if (is_optimized()) {
380 set_ic_destination(info.entry());
381 } else {
382 set_ic_destination_and_value(info.entry(), info.cached_metadata());
383 }
384 }
385
386 if (TraceICs) {
387 ResourceMark rm(thread);
388 assert(info.cached_metadata() == NULL || info.cached_metadata()->is_klass(), "must be");
389 tty->print_cr ("IC@" INTPTR_FORMAT ": monomorphic to compiled (rcvr klass) %s: %s",
390 instruction_address(),
391 ((Klass*)info.cached_metadata())->print_value_string(),
392 (safe) ? "" : "via stub");
393 }
394 }
395 // We can't check this anymore. With lazy deopt we could have already
396 // cleaned this IC entry before we even return. This is possible if
397 // we ran out of space in the inline cache buffer trying to do the
398 // set_next and we safepointed to free up space. This is a benign
399 // race because the IC entry was complete when we safepointed so
400 // cleaning it immediately is harmless.
401 // assert(is_call_to_compiled() || is_call_to_interpreted(), "sanity check");
402 }
403
404
405 // is_optimized: Compiler has generated an optimized call (i.e., no inline
406 // cache) static_bound: The call can be static bound (i.e, no need to use
407 // inline cache)
408 void CompiledIC::compute_monomorphic_entry(methodHandle method,
409 KlassHandle receiver_klass,
410 bool is_optimized,
411 bool static_bound,
412 CompiledICInfo& info,
413 TRAPS) {
414 nmethod* method_code = method->code();
415 address entry = NULL;
416 if (method_code != NULL) {
417 // Call to compiled code
418 if (static_bound || is_optimized) {
419 entry = method_code->verified_entry_point();
420 } else {
421 entry = method_code->entry_point();
422 }
423 }
424 if (entry != NULL) {
425 // Call to compiled code
426 info.set_compiled_entry(entry, (static_bound || is_optimized) ? NULL : receiver_klass(), is_optimized);
427 } else {
428 // Note: the following problem exists with Compiler1:
429 // - at compile time we may or may not know if the destination is final
430 // - if we know that the destination is final, we will emit an optimized
431 // virtual call (no inline cache), and need a Method* to make a call
432 // to the interpreter
433 // - if we do not know if the destination is final, we emit a standard
434 // virtual call, and use CompiledICHolder to call interpreted code
435 // (no static call stub has been generated)
436 // However in that case we will now notice it is static_bound
437 // and convert the call into what looks to be an optimized
438 // virtual call. This causes problems in verifying the IC because
439 // it look vanilla but is optimized. Code in is_call_to_interpreted
440 // is aware of this and weakens its asserts.
441
442 // static_bound should imply is_optimized -- otherwise we have a
443 // performance bug (statically-bindable method is called via
444 // dynamically-dispatched call note: the reverse implication isn't
445 // necessarily true -- the call may have been optimized based on compiler
446 // analysis (static_bound is only based on "final" etc.)
447 #ifdef COMPILER2
448 #ifdef TIERED
449 #if defined(ASSERT)
450 // can't check the assert because we don't have the CompiledIC with which to
451 // find the address if the call instruction.
452 //
453 // CodeBlob* cb = find_blob_unsafe(instruction_address());
454 // assert(cb->is_compiled_by_c1() || !static_bound || is_optimized, "static_bound should imply is_optimized");
455 #endif // ASSERT
456 #else
457 assert(!static_bound || is_optimized, "static_bound should imply is_optimized");
458 #endif // TIERED
459 #endif // COMPILER2
460 if (is_optimized) {
461 // Use stub entry
462 info.set_interpreter_entry(method()->get_c2i_entry(), method());
463 } else {
464 // Use icholder entry
465 CompiledICHolder* holder = new CompiledICHolder(method(), receiver_klass());
466 info.set_icholder_entry(method()->get_c2i_unverified_entry(), holder);
467 }
468 }
469 assert(info.is_optimized() == is_optimized, "must agree");
470 }
471
472
473 bool CompiledIC::is_icholder_entry(address entry) {
474 CodeBlob* cb = CodeCache::find_blob_unsafe(entry);
475 return (cb != NULL && cb->is_adapter_blob());
476 }
477
478 // ----------------------------------------------------------------------------
479
480 void CompiledStaticCall::set_to_clean() {
481 assert (CompiledIC_lock->is_locked() || SafepointSynchronize::is_at_safepoint(), "mt unsafe call");
482 // Reset call site
483 MutexLockerEx pl(Patching_lock, Mutex::_no_safepoint_check_flag);
484 #ifdef ASSERT
485 CodeBlob* cb = CodeCache::find_blob_unsafe(this);
486 assert(cb != NULL && cb->is_nmethod(), "must be nmethod");
487 #endif
488 set_destination_mt_safe(SharedRuntime::get_resolve_static_call_stub());
489
490 // Do not reset stub here: It is too expensive to call find_stub.
491 // Instead, rely on caller (nmethod::clear_inline_caches) to clear
492 // both the call and its stub.
493 }
494
495
496 bool CompiledStaticCall::is_clean() const {
497 return destination() == SharedRuntime::get_resolve_static_call_stub();
498 }
499
500 bool CompiledStaticCall::is_call_to_compiled() const {
501 return CodeCache::contains(destination());
502 }
503
504
505 bool CompiledStaticCall::is_call_to_interpreted() const {
506 // It is a call to interpreted, if it calls to a stub. Hence, the destination
507 // must be in the stub part of the nmethod that contains the call
508 nmethod* nm = CodeCache::find_nmethod(instruction_address());
509 return nm->stub_contains(destination());
510 }
511
512 void CompiledStaticCall::set(const StaticCallInfo& info) {
513 assert (CompiledIC_lock->is_locked() || SafepointSynchronize::is_at_safepoint(), "mt unsafe call");
514 MutexLockerEx pl(Patching_lock, Mutex::_no_safepoint_check_flag);
515 // Updating a cache to the wrong entry can cause bugs that are very hard
516 // to track down - if cache entry gets invalid - we just clean it. In
517 // this way it is always the same code path that is responsible for
518 // updating and resolving an inline cache
519 assert(is_clean(), "do not update a call entry - use clean");
520
521 if (info._to_interpreter) {
522 // Call to interpreted code
523 set_to_interpreted(info.callee(), info.entry());
524 } else {
525 if (TraceICs) {
526 ResourceMark rm;
527 tty->print_cr("CompiledStaticCall@" INTPTR_FORMAT ": set_to_compiled " INTPTR_FORMAT,
528 instruction_address(),
529 info.entry());
530 }
531 // Call to compiled code
532 assert (CodeCache::contains(info.entry()), "wrong entry point");
533 set_destination_mt_safe(info.entry());
534 }
535 }
536
537
538 // Compute settings for a CompiledStaticCall. Since we might have to set
539 // the stub when calling to the interpreter, we need to return arguments.
540 void CompiledStaticCall::compute_entry(methodHandle m, StaticCallInfo& info) {
541 nmethod* m_code = m->code();
542 info._callee = m;
543 if (m_code != NULL) {
544 info._to_interpreter = false;
545 info._entry = m_code->verified_entry_point();
546 } else {
547 // Callee is interpreted code. In any case entering the interpreter
548 // puts a converter-frame on the stack to save arguments.
549 info._to_interpreter = true;
550 info._entry = m()->get_c2i_entry();
551 }
552 }
553
554 address CompiledStaticCall::find_stub() {
555 // Find reloc. information containing this call-site
556 RelocIterator iter((nmethod*)NULL, instruction_address());
557 while (iter.next()) {
558 if (iter.addr() == instruction_address()) {
559 switch(iter.type()) {
560 case relocInfo::static_call_type:
561 return iter.static_call_reloc()->static_stub();
562 // We check here for opt_virtual_call_type, since we reuse the code
563 // from the CompiledIC implementation
564 case relocInfo::opt_virtual_call_type:
565 return iter.opt_virtual_call_reloc()->static_stub();
566 case relocInfo::poll_type:
567 case relocInfo::poll_return_type: // A safepoint can't overlap a call.
568 default:
569 ShouldNotReachHere();
570 }
571 }
572 }
573 return NULL;
574 }
575
576
577 //-----------------------------------------------------------------------------
578 // Non-product mode code
579 #ifndef PRODUCT
580
581 void CompiledIC::verify() {
582 // make sure code pattern is actually a call imm32 instruction
583 _ic_call->verify();
584 if (os::is_MP()) {
585 _ic_call->verify_alignment();
586 }
587 assert(is_clean() || is_call_to_compiled() || is_call_to_interpreted()
588 || is_optimized() || is_megamorphic(), "sanity check");
589 }
590
591 void CompiledIC::print() {
592 print_compiled_ic();
593 tty->cr();
594 }
595
596 void CompiledIC::print_compiled_ic() {
597 tty->print("Inline cache at " INTPTR_FORMAT ", calling %s " INTPTR_FORMAT " cached_value " INTPTR_FORMAT,
598 instruction_address(), is_call_to_interpreted() ? "interpreted " : "", ic_destination(), is_optimized() ? NULL : cached_value());
599 }
600
601 void CompiledStaticCall::print() {
602 tty->print("static call at " INTPTR_FORMAT " -> ", instruction_address());
603 if (is_clean()) {
604 tty->print("clean");
605 } else if (is_call_to_compiled()) {
606 tty->print("compiled");
607 } else if (is_call_to_interpreted()) {
608 tty->print("interpreted");
609 }
610 tty->cr();
611 }
612
613 #endif // !PRODUCT