1 /* 2 * Copyright 1997-2010 Sun Microsystems, Inc. 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, 20 * CA 95054 USA or visit www.sun.com if you need additional information or 21 * have any questions. 22 * 23 */ 24 25 #include "incls/_precompiled.incl" 26 #include "incls/_compiledIC.cpp.incl" 27 28 29 // Every time a compiled IC is changed or its type is being accessed, 30 // either the CompiledIC_lock must be set or we must be at a safe point. 31 32 //----------------------------------------------------------------------------- 33 // Low-level access to an inline cache. Private, since they might not be 34 // MT-safe to use. 35 36 void CompiledIC::set_cached_oop(oop cache) { 37 assert (CompiledIC_lock->is_locked() || SafepointSynchronize::is_at_safepoint(), ""); 38 assert (!is_optimized(), "an optimized virtual call does not have a cached oop"); 39 assert (cache == NULL || cache != badOop, "invalid oop"); 40 41 if (TraceCompiledIC) { 42 tty->print(" "); 43 print_compiled_ic(); 44 tty->print_cr(" changing oop to " INTPTR_FORMAT, (address)cache); 45 } 46 47 if (cache == NULL) cache = (oop)Universe::non_oop_word(); 48 49 *_oop_addr = cache; 50 // fix up the relocations 51 RelocIterator iter = _oops; 52 while (iter.next()) { 53 if (iter.type() == relocInfo::oop_type) { 54 oop_Relocation* r = iter.oop_reloc(); 55 if (r->oop_addr() == _oop_addr) 56 r->fix_oop_relocation(); 57 } 58 } 59 return; 60 } 61 62 63 oop CompiledIC::cached_oop() const { 64 assert (CompiledIC_lock->is_locked() || SafepointSynchronize::is_at_safepoint(), ""); 65 assert (!is_optimized(), "an optimized virtual call does not have a cached oop"); 66 67 if (!is_in_transition_state()) { 68 oop data = *_oop_addr; 69 // If we let the oop value here be initialized to zero... 70 assert(data != NULL || Universe::non_oop_word() == NULL, 71 "no raw nulls in CompiledIC oops, because of patching races"); 72 return (data == (oop)Universe::non_oop_word()) ? (oop)NULL : data; 73 } else { 74 return InlineCacheBuffer::cached_oop_for((CompiledIC *)this); 75 } 76 } 77 78 79 void CompiledIC::set_ic_destination(address entry_point) { 80 assert(entry_point != NULL, "must set legal entry point"); 81 assert(CompiledIC_lock->is_locked() || SafepointSynchronize::is_at_safepoint(), ""); 82 if (TraceCompiledIC) { 83 tty->print(" "); 84 print_compiled_ic(); 85 tty->print_cr(" changing destination to " INTPTR_FORMAT, entry_point); 86 } 87 MutexLockerEx pl(Patching_lock, Mutex::_no_safepoint_check_flag); 88 #ifdef ASSERT 89 CodeBlob* cb = CodeCache::find_blob_unsafe(_ic_call); 90 assert(cb != NULL && cb->is_nmethod(), "must be nmethod"); 91 #endif 92 _ic_call->set_destination_mt_safe(entry_point); 93 } 94 95 96 address CompiledIC::ic_destination() const { 97 assert (CompiledIC_lock->is_locked() || SafepointSynchronize::is_at_safepoint(), ""); 98 if (!is_in_transition_state()) { 99 return _ic_call->destination(); 100 } else { 101 return InlineCacheBuffer::ic_destination_for((CompiledIC *)this); 102 } 103 } 104 105 106 bool CompiledIC::is_in_transition_state() const { 107 assert (CompiledIC_lock->is_locked() || SafepointSynchronize::is_at_safepoint(), ""); 108 return InlineCacheBuffer::contains(_ic_call->destination()); 109 } 110 111 112 // Returns native address of 'call' instruction in inline-cache. Used by 113 // the InlineCacheBuffer when it needs to find the stub. 114 address CompiledIC::stub_address() const { 115 assert(is_in_transition_state(), "should only be called when we are in a transition state"); 116 return _ic_call->destination(); 117 } 118 119 120 //----------------------------------------------------------------------------- 121 // High-level access to an inline cache. Guaranteed to be MT-safe. 122 123 124 void CompiledIC::set_to_megamorphic(CallInfo* call_info, Bytecodes::Code bytecode, TRAPS) { 125 methodHandle method = call_info->selected_method(); 126 bool is_invoke_interface = (bytecode == Bytecodes::_invokeinterface && !call_info->has_vtable_index()); 127 assert(CompiledIC_lock->is_locked() || SafepointSynchronize::is_at_safepoint(), ""); 128 assert(method->is_oop(), "cannot be NULL and must be oop"); 129 assert(!is_optimized(), "cannot set an optimized virtual call to megamorphic"); 130 assert(is_call_to_compiled() || is_call_to_interpreted(), "going directly to megamorphic?"); 131 132 address entry; 133 if (is_invoke_interface) { 134 int index = klassItable::compute_itable_index(call_info->resolved_method()()); 135 entry = VtableStubs::create_stub(false, index, method()); 136 assert(entry != NULL, "entry not computed"); 137 klassOop k = call_info->resolved_method()->method_holder(); 138 assert(Klass::cast(k)->is_interface(), "sanity check"); 139 InlineCacheBuffer::create_transition_stub(this, k, entry); 140 } else { 141 // Can be different than method->vtable_index(), due to package-private etc. 142 int vtable_index = call_info->vtable_index(); 143 entry = VtableStubs::create_stub(true, vtable_index, method()); 144 InlineCacheBuffer::create_transition_stub(this, method(), entry); 145 } 146 147 if (TraceICs) { 148 ResourceMark rm; 149 tty->print_cr ("IC@" INTPTR_FORMAT ": to megamorphic %s entry: " INTPTR_FORMAT, 150 instruction_address(), method->print_value_string(), entry); 151 } 152 153 Events::log("compiledIC " INTPTR_FORMAT " --> megamorphic " INTPTR_FORMAT, this, (address)method()); 154 // We can't check this anymore. With lazy deopt we could have already 155 // cleaned this IC entry before we even return. This is possible if 156 // we ran out of space in the inline cache buffer trying to do the 157 // set_next and we safepointed to free up space. This is a benign 158 // race because the IC entry was complete when we safepointed so 159 // cleaning it immediately is harmless. 160 // assert(is_megamorphic(), "sanity check"); 161 } 162 163 164 // true if destination is megamorphic stub 165 bool CompiledIC::is_megamorphic() const { 166 assert(CompiledIC_lock->is_locked() || SafepointSynchronize::is_at_safepoint(), ""); 167 assert(!is_optimized(), "an optimized call cannot be megamorphic"); 168 169 // Cannot rely on cached_oop. It is either an interface or a method. 170 return VtableStubs::is_entry_point(ic_destination()); 171 } 172 173 bool CompiledIC::is_call_to_compiled() const { 174 assert (CompiledIC_lock->is_locked() || SafepointSynchronize::is_at_safepoint(), ""); 175 176 // Use unsafe, since an inline cache might point to a zombie method. However, the zombie 177 // method is guaranteed to still exist, since we only remove methods after all inline caches 178 // has been cleaned up 179 CodeBlob* cb = CodeCache::find_blob_unsafe(ic_destination()); 180 bool is_monomorphic = (cb != NULL && cb->is_nmethod()); 181 // Check that the cached_oop is a klass for non-optimized monomorphic calls 182 // This assertion is invalid for compiler1: a call that does not look optimized (no static stub) can be used 183 // for calling directly to vep without using the inline cache (i.e., cached_oop == NULL) 184 #ifdef ASSERT 185 #ifdef TIERED 186 CodeBlob* caller = CodeCache::find_blob_unsafe(instruction_address()); 187 bool is_c1_method = caller->is_compiled_by_c1(); 188 #else 189 #ifdef COMPILER1 190 bool is_c1_method = true; 191 #else 192 bool is_c1_method = false; 193 #endif // COMPILER1 194 #endif // TIERED 195 assert( is_c1_method || 196 !is_monomorphic || 197 is_optimized() || 198 (cached_oop() != NULL && cached_oop()->is_klass()), "sanity check"); 199 #endif // ASSERT 200 return is_monomorphic; 201 } 202 203 204 bool CompiledIC::is_call_to_interpreted() const { 205 assert (CompiledIC_lock->is_locked() || SafepointSynchronize::is_at_safepoint(), ""); 206 // Call to interpreter if destination is either calling to a stub (if it 207 // is optimized), or calling to an I2C blob 208 bool is_call_to_interpreted = false; 209 if (!is_optimized()) { 210 // must use unsafe because the destination can be a zombie (and we're cleaning) 211 // and the print_compiled_ic code wants to know if site (in the non-zombie) 212 // is to the interpreter. 213 CodeBlob* cb = CodeCache::find_blob_unsafe(ic_destination()); 214 is_call_to_interpreted = (cb != NULL && cb->is_adapter_blob()); 215 assert(!is_call_to_interpreted || (cached_oop() != NULL && cached_oop()->is_compiledICHolder()), "sanity check"); 216 } else { 217 // Check if we are calling into our own codeblob (i.e., to a stub) 218 CodeBlob* cb = CodeCache::find_blob(_ic_call->instruction_address()); 219 address dest = ic_destination(); 220 #ifdef ASSERT 221 { 222 CodeBlob* db = CodeCache::find_blob_unsafe(dest); 223 assert(!db->is_adapter_blob(), "must use stub!"); 224 } 225 #endif /* ASSERT */ 226 is_call_to_interpreted = cb->contains(dest); 227 } 228 return is_call_to_interpreted; 229 } 230 231 232 void CompiledIC::set_to_clean() { 233 assert(SafepointSynchronize::is_at_safepoint() || CompiledIC_lock->is_locked() , "MT-unsafe call"); 234 if (TraceInlineCacheClearing || TraceICs) { 235 tty->print_cr("IC@" INTPTR_FORMAT ": set to clean", instruction_address()); 236 print(); 237 } 238 239 address entry; 240 if (is_optimized()) { 241 entry = SharedRuntime::get_resolve_opt_virtual_call_stub(); 242 } else { 243 entry = SharedRuntime::get_resolve_virtual_call_stub(); 244 } 245 246 // A zombie transition will always be safe, since the oop has already been set to NULL, so 247 // we only need to patch the destination 248 bool safe_transition = is_optimized() || SafepointSynchronize::is_at_safepoint(); 249 250 if (safe_transition) { 251 if (!is_optimized()) set_cached_oop(NULL); 252 // Kill any leftover stub we might have too 253 if (is_in_transition_state()) { 254 ICStub* old_stub = ICStub_from_destination_address(stub_address()); 255 old_stub->clear(); 256 } 257 set_ic_destination(entry); 258 } else { 259 // Unsafe transition - create stub. 260 InlineCacheBuffer::create_transition_stub(this, NULL, entry); 261 } 262 // We can't check this anymore. With lazy deopt we could have already 263 // cleaned this IC entry before we even return. This is possible if 264 // we ran out of space in the inline cache buffer trying to do the 265 // set_next and we safepointed to free up space. This is a benign 266 // race because the IC entry was complete when we safepointed so 267 // cleaning it immediately is harmless. 268 // assert(is_clean(), "sanity check"); 269 } 270 271 272 bool CompiledIC::is_clean() const { 273 assert (CompiledIC_lock->is_locked() || SafepointSynchronize::is_at_safepoint(), ""); 274 bool is_clean = false; 275 address dest = ic_destination(); 276 is_clean = dest == SharedRuntime::get_resolve_opt_virtual_call_stub() || 277 dest == SharedRuntime::get_resolve_virtual_call_stub(); 278 assert(!is_clean || is_optimized() || cached_oop() == NULL, "sanity check"); 279 return is_clean; 280 } 281 282 283 void CompiledIC::set_to_monomorphic(const CompiledICInfo& info) { 284 assert (CompiledIC_lock->is_locked() || SafepointSynchronize::is_at_safepoint(), ""); 285 // Updating a cache to the wrong entry can cause bugs that are very hard 286 // to track down - if cache entry gets invalid - we just clean it. In 287 // this way it is always the same code path that is responsible for 288 // updating and resolving an inline cache 289 // 290 // The above is no longer true. SharedRuntime::fixup_callers_callsite will change optimized 291 // callsites. In addition ic_miss code will update a site to monomorphic if it determines 292 // that an monomorphic call to the interpreter can now be monomorphic to compiled code. 293 // 294 // In both of these cases the only thing being modifed is the jump/call target and these 295 // transitions are mt_safe 296 297 Thread *thread = Thread::current(); 298 if (info._to_interpreter) { 299 // Call to interpreter 300 if (info.is_optimized() && is_optimized()) { 301 assert(is_clean(), "unsafe IC path"); 302 MutexLockerEx pl(Patching_lock, Mutex::_no_safepoint_check_flag); 303 // the call analysis (callee structure) specifies that the call is optimized 304 // (either because of CHA or the static target is final) 305 // At code generation time, this call has been emitted as static call 306 // Call via stub 307 assert(info.cached_oop().not_null() && info.cached_oop()->is_method(), "sanity check"); 308 CompiledStaticCall* csc = compiledStaticCall_at(instruction_address()); 309 methodHandle method (thread, (methodOop)info.cached_oop()()); 310 csc->set_to_interpreted(method, info.entry()); 311 if (TraceICs) { 312 ResourceMark rm(thread); 313 tty->print_cr ("IC@" INTPTR_FORMAT ": monomorphic to interpreter: %s", 314 instruction_address(), 315 method->print_value_string()); 316 } 317 } else { 318 // Call via method-klass-holder 319 assert(info.cached_oop().not_null(), "must be set"); 320 InlineCacheBuffer::create_transition_stub(this, info.cached_oop()(), info.entry()); 321 322 if (TraceICs) { 323 ResourceMark rm(thread); 324 tty->print_cr ("IC@" INTPTR_FORMAT ": monomorphic to interpreter via mkh", instruction_address()); 325 } 326 } 327 } else { 328 // Call to compiled code 329 bool static_bound = info.is_optimized() || (info.cached_oop().is_null()); 330 #ifdef ASSERT 331 CodeBlob* cb = CodeCache::find_blob_unsafe(info.entry()); 332 assert (cb->is_nmethod(), "must be compiled!"); 333 #endif /* ASSERT */ 334 335 // This is MT safe if we come from a clean-cache and go through a 336 // non-verified entry point 337 bool safe = SafepointSynchronize::is_at_safepoint() || 338 (!is_in_transition_state() && (info.is_optimized() || static_bound || is_clean())); 339 340 if (!safe) { 341 InlineCacheBuffer::create_transition_stub(this, info.cached_oop()(), info.entry()); 342 } else { 343 set_ic_destination(info.entry()); 344 if (!is_optimized()) set_cached_oop(info.cached_oop()()); 345 } 346 347 if (TraceICs) { 348 ResourceMark rm(thread); 349 assert(info.cached_oop() == NULL || info.cached_oop()()->is_klass(), "must be"); 350 tty->print_cr ("IC@" INTPTR_FORMAT ": monomorphic to compiled (rcvr klass) %s: %s", 351 instruction_address(), 352 ((klassOop)info.cached_oop()())->print_value_string(), 353 (safe) ? "" : "via stub"); 354 } 355 } 356 // We can't check this anymore. With lazy deopt we could have already 357 // cleaned this IC entry before we even return. This is possible if 358 // we ran out of space in the inline cache buffer trying to do the 359 // set_next and we safepointed to free up space. This is a benign 360 // race because the IC entry was complete when we safepointed so 361 // cleaning it immediately is harmless. 362 // assert(is_call_to_compiled() || is_call_to_interpreted(), "sanity check"); 363 } 364 365 366 // is_optimized: Compiler has generated an optimized call (i.e., no inline 367 // cache) static_bound: The call can be static bound (i.e, no need to use 368 // inline cache) 369 void CompiledIC::compute_monomorphic_entry(methodHandle method, 370 KlassHandle receiver_klass, 371 bool is_optimized, 372 bool static_bound, 373 CompiledICInfo& info, 374 TRAPS) { 375 info._is_optimized = is_optimized; 376 377 nmethod* method_code = method->code(); 378 address entry = NULL; 379 if (method_code != NULL) { 380 // Call to compiled code 381 if (static_bound || is_optimized) { 382 entry = method_code->verified_entry_point(); 383 } else { 384 entry = method_code->entry_point(); 385 } 386 } 387 if (entry != NULL) { 388 // Call to compiled code 389 info._entry = entry; 390 if (static_bound || is_optimized) { 391 info._cached_oop = Handle(THREAD, (oop)NULL); 392 } else { 393 info._cached_oop = receiver_klass; 394 } 395 info._to_interpreter = false; 396 } else { 397 // Note: the following problem exists with Compiler1: 398 // - at compile time we may or may not know if the destination is final 399 // - if we know that the destination is final, we will emit an optimized 400 // virtual call (no inline cache), and need a methodOop to make a call 401 // to the interpreter 402 // - if we do not know if the destination is final, we emit a standard 403 // virtual call, and use CompiledICHolder to call interpreted code 404 // (no static call stub has been generated) 405 // However in that case we will now notice it is static_bound 406 // and convert the call into what looks to be an optimized 407 // virtual call. This causes problems in verifying the IC because 408 // it look vanilla but is optimized. Code in is_call_to_interpreted 409 // is aware of this and weakens its asserts. 410 411 info._to_interpreter = true; 412 // static_bound should imply is_optimized -- otherwise we have a 413 // performance bug (statically-bindable method is called via 414 // dynamically-dispatched call note: the reverse implication isn't 415 // necessarily true -- the call may have been optimized based on compiler 416 // analysis (static_bound is only based on "final" etc.) 417 #ifdef COMPILER2 418 #ifdef TIERED 419 #if defined(ASSERT) 420 // can't check the assert because we don't have the CompiledIC with which to 421 // find the address if the call instruction. 422 // 423 // CodeBlob* cb = find_blob_unsafe(instruction_address()); 424 // assert(cb->is_compiled_by_c1() || !static_bound || is_optimized, "static_bound should imply is_optimized"); 425 #endif // ASSERT 426 #else 427 assert(!static_bound || is_optimized, "static_bound should imply is_optimized"); 428 #endif // TIERED 429 #endif // COMPILER2 430 if (is_optimized) { 431 // Use stub entry 432 info._entry = method()->get_c2i_entry(); 433 info._cached_oop = method; 434 } else { 435 // Use mkh entry 436 oop holder = oopFactory::new_compiledICHolder(method, receiver_klass, CHECK); 437 info._cached_oop = Handle(THREAD, holder); 438 info._entry = method()->get_c2i_unverified_entry(); 439 } 440 } 441 } 442 443 444 inline static RelocIterator parse_ic(nmethod* nm, address ic_call, oop* &_oop_addr, bool *is_optimized) { 445 address first_oop = NULL; 446 // Mergers please note: Sun SC5.x CC insists on an lvalue for a reference parameter. 447 nmethod* tmp_nm = nm; 448 return virtual_call_Relocation::parse_ic(tmp_nm, ic_call, first_oop, _oop_addr, is_optimized); 449 } 450 451 CompiledIC::CompiledIC(NativeCall* ic_call) 452 : _ic_call(ic_call), 453 _oops(parse_ic(NULL, ic_call->instruction_address(), _oop_addr, &_is_optimized)) 454 { 455 } 456 457 458 CompiledIC::CompiledIC(Relocation* ic_reloc) 459 : _ic_call(nativeCall_at(ic_reloc->addr())), 460 _oops(parse_ic(ic_reloc->code(), ic_reloc->addr(), _oop_addr, &_is_optimized)) 461 { 462 assert(ic_reloc->type() == relocInfo::virtual_call_type || 463 ic_reloc->type() == relocInfo::opt_virtual_call_type, "wrong reloc. info"); 464 } 465 466 467 // ---------------------------------------------------------------------------- 468 469 void CompiledStaticCall::set_to_clean() { 470 assert (CompiledIC_lock->is_locked() || SafepointSynchronize::is_at_safepoint(), "mt unsafe call"); 471 // Reset call site 472 MutexLockerEx pl(Patching_lock, Mutex::_no_safepoint_check_flag); 473 #ifdef ASSERT 474 CodeBlob* cb = CodeCache::find_blob_unsafe(this); 475 assert(cb != NULL && cb->is_nmethod(), "must be nmethod"); 476 #endif 477 set_destination_mt_safe(SharedRuntime::get_resolve_static_call_stub()); 478 479 // Do not reset stub here: It is too expensive to call find_stub. 480 // Instead, rely on caller (nmethod::clear_inline_caches) to clear 481 // both the call and its stub. 482 } 483 484 485 bool CompiledStaticCall::is_clean() const { 486 return destination() == SharedRuntime::get_resolve_static_call_stub(); 487 } 488 489 bool CompiledStaticCall::is_call_to_compiled() const { 490 return CodeCache::contains(destination()); 491 } 492 493 494 bool CompiledStaticCall::is_call_to_interpreted() const { 495 // It is a call to interpreted, if it calls to a stub. Hence, the destination 496 // must be in the stub part of the nmethod that contains the call 497 nmethod* nm = CodeCache::find_nmethod(instruction_address()); 498 return nm->stub_contains(destination()); 499 } 500 501 502 void CompiledStaticCall::set_to_interpreted(methodHandle callee, address entry) { 503 address stub=find_stub(); 504 assert(stub!=NULL, "stub not found"); 505 506 if (TraceICs) { 507 ResourceMark rm; 508 tty->print_cr("CompiledStaticCall@" INTPTR_FORMAT ": set_to_interpreted %s", 509 instruction_address(), 510 callee->name_and_sig_as_C_string()); 511 } 512 513 NativeMovConstReg* method_holder = nativeMovConstReg_at(stub); // creation also verifies the object 514 NativeJump* jump = nativeJump_at(method_holder->next_instruction_address()); 515 516 assert(method_holder->data() == 0 || method_holder->data() == (intptr_t)callee(), "a) MT-unsafe modification of inline cache"); 517 assert(jump->jump_destination() == (address)-1 || jump->jump_destination() == entry, "b) MT-unsafe modification of inline cache"); 518 519 // Update stub 520 method_holder->set_data((intptr_t)callee()); 521 jump->set_jump_destination(entry); 522 523 // Update jump to call 524 set_destination_mt_safe(stub); 525 } 526 527 528 void CompiledStaticCall::set(const StaticCallInfo& info) { 529 assert (CompiledIC_lock->is_locked() || SafepointSynchronize::is_at_safepoint(), "mt unsafe call"); 530 MutexLockerEx pl(Patching_lock, Mutex::_no_safepoint_check_flag); 531 // Updating a cache to the wrong entry can cause bugs that are very hard 532 // to track down - if cache entry gets invalid - we just clean it. In 533 // this way it is always the same code path that is responsible for 534 // updating and resolving an inline cache 535 assert(is_clean(), "do not update a call entry - use clean"); 536 537 if (info._to_interpreter) { 538 // Call to interpreted code 539 set_to_interpreted(info.callee(), info.entry()); 540 } else { 541 if (TraceICs) { 542 ResourceMark rm; 543 tty->print_cr("CompiledStaticCall@" INTPTR_FORMAT ": set_to_compiled " INTPTR_FORMAT, 544 instruction_address(), 545 info.entry()); 546 } 547 // Call to compiled code 548 assert (CodeCache::contains(info.entry()), "wrong entry point"); 549 set_destination_mt_safe(info.entry()); 550 } 551 } 552 553 554 // Compute settings for a CompiledStaticCall. Since we might have to set 555 // the stub when calling to the interpreter, we need to return arguments. 556 void CompiledStaticCall::compute_entry(methodHandle m, StaticCallInfo& info) { 557 nmethod* m_code = m->code(); 558 info._callee = m; 559 if (m_code != NULL) { 560 info._to_interpreter = false; 561 info._entry = m_code->verified_entry_point(); 562 } else { 563 // Callee is interpreted code. In any case entering the interpreter 564 // puts a converter-frame on the stack to save arguments. 565 info._to_interpreter = true; 566 info._entry = m()->get_c2i_entry(); 567 } 568 } 569 570 571 void CompiledStaticCall::set_stub_to_clean(static_stub_Relocation* static_stub) { 572 assert (CompiledIC_lock->is_locked() || SafepointSynchronize::is_at_safepoint(), "mt unsafe call"); 573 // Reset stub 574 address stub = static_stub->addr(); 575 assert(stub!=NULL, "stub not found"); 576 NativeMovConstReg* method_holder = nativeMovConstReg_at(stub); // creation also verifies the object 577 NativeJump* jump = nativeJump_at(method_holder->next_instruction_address()); 578 method_holder->set_data(0); 579 jump->set_jump_destination((address)-1); 580 } 581 582 583 address CompiledStaticCall::find_stub() { 584 // Find reloc. information containing this call-site 585 RelocIterator iter((nmethod*)NULL, instruction_address()); 586 while (iter.next()) { 587 if (iter.addr() == instruction_address()) { 588 switch(iter.type()) { 589 case relocInfo::static_call_type: 590 return iter.static_call_reloc()->static_stub(); 591 // We check here for opt_virtual_call_type, since we reuse the code 592 // from the CompiledIC implementation 593 case relocInfo::opt_virtual_call_type: 594 return iter.opt_virtual_call_reloc()->static_stub(); 595 case relocInfo::poll_type: 596 case relocInfo::poll_return_type: // A safepoint can't overlap a call. 597 default: 598 ShouldNotReachHere(); 599 } 600 } 601 } 602 return NULL; 603 } 604 605 606 //----------------------------------------------------------------------------- 607 // Non-product mode code 608 #ifndef PRODUCT 609 610 void CompiledIC::verify() { 611 // make sure code pattern is actually a call imm32 instruction 612 _ic_call->verify(); 613 if (os::is_MP()) { 614 _ic_call->verify_alignment(); 615 } 616 assert(is_clean() || is_call_to_compiled() || is_call_to_interpreted() 617 || is_optimized() || is_megamorphic(), "sanity check"); 618 } 619 620 621 void CompiledIC::print() { 622 print_compiled_ic(); 623 tty->cr(); 624 } 625 626 627 void CompiledIC::print_compiled_ic() { 628 tty->print("Inline cache at " INTPTR_FORMAT ", calling %s " INTPTR_FORMAT, 629 instruction_address(), is_call_to_interpreted() ? "interpreted " : "", ic_destination()); 630 } 631 632 633 void CompiledStaticCall::print() { 634 tty->print("static call at " INTPTR_FORMAT " -> ", instruction_address()); 635 if (is_clean()) { 636 tty->print("clean"); 637 } else if (is_call_to_compiled()) { 638 tty->print("compiled"); 639 } else if (is_call_to_interpreted()) { 640 tty->print("interpreted"); 641 } 642 tty->cr(); 643 } 644 645 void CompiledStaticCall::verify() { 646 // Verify call 647 NativeCall::verify(); 648 if (os::is_MP()) { 649 verify_alignment(); 650 } 651 652 // Verify stub 653 address stub = find_stub(); 654 assert(stub != NULL, "no stub found for static call"); 655 NativeMovConstReg* method_holder = nativeMovConstReg_at(stub); // creation also verifies the object 656 NativeJump* jump = nativeJump_at(method_holder->next_instruction_address()); 657 658 // Verify state 659 assert(is_clean() || is_call_to_compiled() || is_call_to_interpreted(), "sanity check"); 660 } 661 662 #endif