compiledIC.cpp revision 3064:aa3d708d67c4
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/oopFactory.hpp" 35#include "oops/methodOop.hpp" 36#include "oops/oop.inline.hpp" 37#include "oops/symbol.hpp" 38#include "runtime/icache.hpp" 39#include "runtime/sharedRuntime.hpp" 40#include "runtime/stubRoutines.hpp" 41#include "utilities/events.hpp" 42 43 44// Every time a compiled IC is changed or its type is being accessed, 45// either the CompiledIC_lock must be set or we must be at a safe point. 46 47//----------------------------------------------------------------------------- 48// Low-level access to an inline cache. Private, since they might not be 49// MT-safe to use. 50 51void CompiledIC::set_cached_oop(oop cache) { 52 assert (CompiledIC_lock->is_locked() || SafepointSynchronize::is_at_safepoint(), ""); 53 assert (!is_optimized(), "an optimized virtual call does not have a cached oop"); 54 assert (cache == NULL || cache != badOop, "invalid oop"); 55 56 if (TraceCompiledIC) { 57 tty->print(" "); 58 print_compiled_ic(); 59 tty->print_cr(" changing oop to " INTPTR_FORMAT, (address)cache); 60 } 61 62 if (cache == NULL) cache = (oop)Universe::non_oop_word(); 63 64 *_oop_addr = cache; 65 // fix up the relocations 66 RelocIterator iter = _oops; 67 while (iter.next()) { 68 if (iter.type() == relocInfo::oop_type) { 69 oop_Relocation* r = iter.oop_reloc(); 70 if (r->oop_addr() == _oop_addr) 71 r->fix_oop_relocation(); 72 } 73 } 74 return; 75} 76 77 78oop CompiledIC::cached_oop() const { 79 assert (CompiledIC_lock->is_locked() || SafepointSynchronize::is_at_safepoint(), ""); 80 assert (!is_optimized(), "an optimized virtual call does not have a cached oop"); 81 82 if (!is_in_transition_state()) { 83 oop data = *_oop_addr; 84 // If we let the oop value here be initialized to zero... 85 assert(data != NULL || Universe::non_oop_word() == NULL, 86 "no raw nulls in CompiledIC oops, because of patching races"); 87 return (data == (oop)Universe::non_oop_word()) ? (oop)NULL : data; 88 } else { 89 return InlineCacheBuffer::cached_oop_for((CompiledIC *)this); 90 } 91} 92 93 94void CompiledIC::set_ic_destination(address entry_point) { 95 assert(entry_point != NULL, "must set legal entry point"); 96 assert(CompiledIC_lock->is_locked() || SafepointSynchronize::is_at_safepoint(), ""); 97 if (TraceCompiledIC) { 98 tty->print(" "); 99 print_compiled_ic(); 100 tty->print_cr(" changing destination to " INTPTR_FORMAT, entry_point); 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 111address CompiledIC::ic_destination() const { 112 assert (CompiledIC_lock->is_locked() || SafepointSynchronize::is_at_safepoint(), ""); 113 if (!is_in_transition_state()) { 114 return _ic_call->destination(); 115 } else { 116 return InlineCacheBuffer::ic_destination_for((CompiledIC *)this); 117 } 118} 119 120 121bool CompiledIC::is_in_transition_state() const { 122 assert (CompiledIC_lock->is_locked() || SafepointSynchronize::is_at_safepoint(), ""); 123 return InlineCacheBuffer::contains(_ic_call->destination()); 124} 125 126 127// Returns native address of 'call' instruction in inline-cache. Used by 128// the InlineCacheBuffer when it needs to find the stub. 129address CompiledIC::stub_address() const { 130 assert(is_in_transition_state(), "should only be called when we are in a transition state"); 131 return _ic_call->destination(); 132} 133 134 135//----------------------------------------------------------------------------- 136// High-level access to an inline cache. Guaranteed to be MT-safe. 137 138 139void CompiledIC::set_to_megamorphic(CallInfo* call_info, Bytecodes::Code bytecode, TRAPS) { 140 methodHandle method = call_info->selected_method(); 141 bool is_invoke_interface = (bytecode == Bytecodes::_invokeinterface && !call_info->has_vtable_index()); 142 assert(CompiledIC_lock->is_locked() || SafepointSynchronize::is_at_safepoint(), ""); 143 assert(method->is_oop(), "cannot be NULL and must be oop"); 144 assert(!is_optimized(), "cannot set an optimized virtual call to megamorphic"); 145 assert(is_call_to_compiled() || is_call_to_interpreted(), "going directly to megamorphic?"); 146 147 address entry; 148 if (is_invoke_interface) { 149 int index = klassItable::compute_itable_index(call_info->resolved_method()()); 150 entry = VtableStubs::create_stub(false, index, method()); 151 assert(entry != NULL, "entry not computed"); 152 klassOop k = call_info->resolved_method()->method_holder(); 153 assert(Klass::cast(k)->is_interface(), "sanity check"); 154 InlineCacheBuffer::create_transition_stub(this, k, entry); 155 } else { 156 // Can be different than method->vtable_index(), due to package-private etc. 157 int vtable_index = call_info->vtable_index(); 158 entry = VtableStubs::create_stub(true, vtable_index, method()); 159 InlineCacheBuffer::create_transition_stub(this, method(), entry); 160 } 161 162 if (TraceICs) { 163 ResourceMark rm; 164 tty->print_cr ("IC@" INTPTR_FORMAT ": to megamorphic %s entry: " INTPTR_FORMAT, 165 instruction_address(), method->print_value_string(), entry); 166 } 167 168 // We can't check this anymore. With lazy deopt we could have already 169 // cleaned this IC entry before we even return. This is possible if 170 // we ran out of space in the inline cache buffer trying to do the 171 // set_next and we safepointed to free up space. This is a benign 172 // race because the IC entry was complete when we safepointed so 173 // cleaning it immediately is harmless. 174 // assert(is_megamorphic(), "sanity check"); 175} 176 177 178// true if destination is megamorphic stub 179bool CompiledIC::is_megamorphic() const { 180 assert(CompiledIC_lock->is_locked() || SafepointSynchronize::is_at_safepoint(), ""); 181 assert(!is_optimized(), "an optimized call cannot be megamorphic"); 182 183 // Cannot rely on cached_oop. It is either an interface or a method. 184 return VtableStubs::is_entry_point(ic_destination()); 185} 186 187bool CompiledIC::is_call_to_compiled() const { 188 assert (CompiledIC_lock->is_locked() || SafepointSynchronize::is_at_safepoint(), ""); 189 190 // Use unsafe, since an inline cache might point to a zombie method. However, the zombie 191 // method is guaranteed to still exist, since we only remove methods after all inline caches 192 // has been cleaned up 193 CodeBlob* cb = CodeCache::find_blob_unsafe(ic_destination()); 194 bool is_monomorphic = (cb != NULL && cb->is_nmethod()); 195 // Check that the cached_oop is a klass for non-optimized monomorphic calls 196 // This assertion is invalid for compiler1: a call that does not look optimized (no static stub) can be used 197 // for calling directly to vep without using the inline cache (i.e., cached_oop == NULL) 198#ifdef ASSERT 199#ifdef TIERED 200 CodeBlob* caller = CodeCache::find_blob_unsafe(instruction_address()); 201 bool is_c1_method = caller->is_compiled_by_c1(); 202#else 203#ifdef COMPILER1 204 bool is_c1_method = true; 205#else 206 bool is_c1_method = false; 207#endif // COMPILER1 208#endif // TIERED 209 assert( is_c1_method || 210 !is_monomorphic || 211 is_optimized() || 212 (cached_oop() != NULL && cached_oop()->is_klass()), "sanity check"); 213#endif // ASSERT 214 return is_monomorphic; 215} 216 217 218bool CompiledIC::is_call_to_interpreted() const { 219 assert (CompiledIC_lock->is_locked() || SafepointSynchronize::is_at_safepoint(), ""); 220 // Call to interpreter if destination is either calling to a stub (if it 221 // is optimized), or calling to an I2C blob 222 bool is_call_to_interpreted = false; 223 if (!is_optimized()) { 224 // must use unsafe because the destination can be a zombie (and we're cleaning) 225 // and the print_compiled_ic code wants to know if site (in the non-zombie) 226 // is to the interpreter. 227 CodeBlob* cb = CodeCache::find_blob_unsafe(ic_destination()); 228 is_call_to_interpreted = (cb != NULL && cb->is_adapter_blob()); 229 assert(!is_call_to_interpreted || (cached_oop() != NULL && cached_oop()->is_compiledICHolder()), "sanity check"); 230 } else { 231 // Check if we are calling into our own codeblob (i.e., to a stub) 232 CodeBlob* cb = CodeCache::find_blob(_ic_call->instruction_address()); 233 address dest = ic_destination(); 234#ifdef ASSERT 235 { 236 CodeBlob* db = CodeCache::find_blob_unsafe(dest); 237 assert(!db->is_adapter_blob(), "must use stub!"); 238 } 239#endif /* ASSERT */ 240 is_call_to_interpreted = cb->contains(dest); 241 } 242 return is_call_to_interpreted; 243} 244 245 246void CompiledIC::set_to_clean() { 247 assert(SafepointSynchronize::is_at_safepoint() || CompiledIC_lock->is_locked() , "MT-unsafe call"); 248 if (TraceInlineCacheClearing || TraceICs) { 249 tty->print_cr("IC@" INTPTR_FORMAT ": set to clean", instruction_address()); 250 print(); 251 } 252 253 address entry; 254 if (is_optimized()) { 255 entry = SharedRuntime::get_resolve_opt_virtual_call_stub(); 256 } else { 257 entry = SharedRuntime::get_resolve_virtual_call_stub(); 258 } 259 260 // A zombie transition will always be safe, since the oop has already been set to NULL, so 261 // we only need to patch the destination 262 bool safe_transition = is_optimized() || SafepointSynchronize::is_at_safepoint(); 263 264 if (safe_transition) { 265 if (!is_optimized()) set_cached_oop(NULL); 266 // Kill any leftover stub we might have too 267 if (is_in_transition_state()) { 268 ICStub* old_stub = ICStub_from_destination_address(stub_address()); 269 old_stub->clear(); 270 } 271 set_ic_destination(entry); 272 } else { 273 // Unsafe transition - create stub. 274 InlineCacheBuffer::create_transition_stub(this, NULL, entry); 275 } 276 // We can't check this anymore. With lazy deopt we could have already 277 // cleaned this IC entry before we even return. This is possible if 278 // we ran out of space in the inline cache buffer trying to do the 279 // set_next and we safepointed to free up space. This is a benign 280 // race because the IC entry was complete when we safepointed so 281 // cleaning it immediately is harmless. 282 // assert(is_clean(), "sanity check"); 283} 284 285 286bool CompiledIC::is_clean() const { 287 assert (CompiledIC_lock->is_locked() || SafepointSynchronize::is_at_safepoint(), ""); 288 bool is_clean = false; 289 address dest = ic_destination(); 290 is_clean = dest == SharedRuntime::get_resolve_opt_virtual_call_stub() || 291 dest == SharedRuntime::get_resolve_virtual_call_stub(); 292 assert(!is_clean || is_optimized() || cached_oop() == NULL, "sanity check"); 293 return is_clean; 294} 295 296 297void CompiledIC::set_to_monomorphic(const CompiledICInfo& info) { 298 assert (CompiledIC_lock->is_locked() || SafepointSynchronize::is_at_safepoint(), ""); 299 // Updating a cache to the wrong entry can cause bugs that are very hard 300 // to track down - if cache entry gets invalid - we just clean it. In 301 // this way it is always the same code path that is responsible for 302 // updating and resolving an inline cache 303 // 304 // The above is no longer true. SharedRuntime::fixup_callers_callsite will change optimized 305 // callsites. In addition ic_miss code will update a site to monomorphic if it determines 306 // that an monomorphic call to the interpreter can now be monomorphic to compiled code. 307 // 308 // In both of these cases the only thing being modifed is the jump/call target and these 309 // transitions are mt_safe 310 311 Thread *thread = Thread::current(); 312 if (info._to_interpreter) { 313 // Call to interpreter 314 if (info.is_optimized() && is_optimized()) { 315 assert(is_clean(), "unsafe IC path"); 316 MutexLockerEx pl(Patching_lock, Mutex::_no_safepoint_check_flag); 317 // the call analysis (callee structure) specifies that the call is optimized 318 // (either because of CHA or the static target is final) 319 // At code generation time, this call has been emitted as static call 320 // Call via stub 321 assert(info.cached_oop().not_null() && info.cached_oop()->is_method(), "sanity check"); 322 CompiledStaticCall* csc = compiledStaticCall_at(instruction_address()); 323 methodHandle method (thread, (methodOop)info.cached_oop()()); 324 csc->set_to_interpreted(method, info.entry()); 325 if (TraceICs) { 326 ResourceMark rm(thread); 327 tty->print_cr ("IC@" INTPTR_FORMAT ": monomorphic to interpreter: %s", 328 instruction_address(), 329 method->print_value_string()); 330 } 331 } else { 332 // Call via method-klass-holder 333 assert(info.cached_oop().not_null(), "must be set"); 334 InlineCacheBuffer::create_transition_stub(this, info.cached_oop()(), info.entry()); 335 336 if (TraceICs) { 337 ResourceMark rm(thread); 338 tty->print_cr ("IC@" INTPTR_FORMAT ": monomorphic to interpreter via mkh", instruction_address()); 339 } 340 } 341 } else { 342 // Call to compiled code 343 bool static_bound = info.is_optimized() || (info.cached_oop().is_null()); 344#ifdef ASSERT 345 CodeBlob* cb = CodeCache::find_blob_unsafe(info.entry()); 346 assert (cb->is_nmethod(), "must be compiled!"); 347#endif /* ASSERT */ 348 349 // This is MT safe if we come from a clean-cache and go through a 350 // non-verified entry point 351 bool safe = SafepointSynchronize::is_at_safepoint() || 352 (!is_in_transition_state() && (info.is_optimized() || static_bound || is_clean())); 353 354 if (!safe) { 355 InlineCacheBuffer::create_transition_stub(this, info.cached_oop()(), info.entry()); 356 } else { 357 set_ic_destination(info.entry()); 358 if (!is_optimized()) set_cached_oop(info.cached_oop()()); 359 } 360 361 if (TraceICs) { 362 ResourceMark rm(thread); 363 assert(info.cached_oop() == NULL || info.cached_oop()()->is_klass(), "must be"); 364 tty->print_cr ("IC@" INTPTR_FORMAT ": monomorphic to compiled (rcvr klass) %s: %s", 365 instruction_address(), 366 ((klassOop)info.cached_oop()())->print_value_string(), 367 (safe) ? "" : "via stub"); 368 } 369 } 370 // We can't check this anymore. With lazy deopt we could have already 371 // cleaned this IC entry before we even return. This is possible if 372 // we ran out of space in the inline cache buffer trying to do the 373 // set_next and we safepointed to free up space. This is a benign 374 // race because the IC entry was complete when we safepointed so 375 // cleaning it immediately is harmless. 376 // assert(is_call_to_compiled() || is_call_to_interpreted(), "sanity check"); 377} 378 379 380// is_optimized: Compiler has generated an optimized call (i.e., no inline 381// cache) static_bound: The call can be static bound (i.e, no need to use 382// inline cache) 383void CompiledIC::compute_monomorphic_entry(methodHandle method, 384 KlassHandle receiver_klass, 385 bool is_optimized, 386 bool static_bound, 387 CompiledICInfo& info, 388 TRAPS) { 389 info._is_optimized = is_optimized; 390 391 nmethod* method_code = method->code(); 392 address entry = NULL; 393 if (method_code != NULL) { 394 // Call to compiled code 395 if (static_bound || is_optimized) { 396 entry = method_code->verified_entry_point(); 397 } else { 398 entry = method_code->entry_point(); 399 } 400 } 401 if (entry != NULL) { 402 // Call to compiled code 403 info._entry = entry; 404 if (static_bound || is_optimized) { 405 info._cached_oop = Handle(THREAD, (oop)NULL); 406 } else { 407 info._cached_oop = receiver_klass; 408 } 409 info._to_interpreter = false; 410 } else { 411 // Note: the following problem exists with Compiler1: 412 // - at compile time we may or may not know if the destination is final 413 // - if we know that the destination is final, we will emit an optimized 414 // virtual call (no inline cache), and need a methodOop to make a call 415 // to the interpreter 416 // - if we do not know if the destination is final, we emit a standard 417 // virtual call, and use CompiledICHolder to call interpreted code 418 // (no static call stub has been generated) 419 // However in that case we will now notice it is static_bound 420 // and convert the call into what looks to be an optimized 421 // virtual call. This causes problems in verifying the IC because 422 // it look vanilla but is optimized. Code in is_call_to_interpreted 423 // is aware of this and weakens its asserts. 424 425 info._to_interpreter = true; 426 // static_bound should imply is_optimized -- otherwise we have a 427 // performance bug (statically-bindable method is called via 428 // dynamically-dispatched call note: the reverse implication isn't 429 // necessarily true -- the call may have been optimized based on compiler 430 // analysis (static_bound is only based on "final" etc.) 431#ifdef COMPILER2 432#ifdef TIERED 433#if defined(ASSERT) 434 // can't check the assert because we don't have the CompiledIC with which to 435 // find the address if the call instruction. 436 // 437 // CodeBlob* cb = find_blob_unsafe(instruction_address()); 438 // assert(cb->is_compiled_by_c1() || !static_bound || is_optimized, "static_bound should imply is_optimized"); 439#endif // ASSERT 440#else 441 assert(!static_bound || is_optimized, "static_bound should imply is_optimized"); 442#endif // TIERED 443#endif // COMPILER2 444 if (is_optimized) { 445 // Use stub entry 446 info._entry = method()->get_c2i_entry(); 447 info._cached_oop = method; 448 } else { 449 // Use mkh entry 450 oop holder = oopFactory::new_compiledICHolder(method, receiver_klass, CHECK); 451 info._cached_oop = Handle(THREAD, holder); 452 info._entry = method()->get_c2i_unverified_entry(); 453 } 454 } 455} 456 457 458inline static RelocIterator parse_ic(nmethod* nm, address ic_call, oop* &_oop_addr, bool *is_optimized) { 459 address first_oop = NULL; 460 // Mergers please note: Sun SC5.x CC insists on an lvalue for a reference parameter. 461 nmethod* tmp_nm = nm; 462 return virtual_call_Relocation::parse_ic(tmp_nm, ic_call, first_oop, _oop_addr, is_optimized); 463} 464 465CompiledIC::CompiledIC(NativeCall* ic_call) 466 : _ic_call(ic_call), 467 _oops(parse_ic(NULL, ic_call->instruction_address(), _oop_addr, &_is_optimized)) 468{ 469} 470 471 472CompiledIC::CompiledIC(Relocation* ic_reloc) 473 : _ic_call(nativeCall_at(ic_reloc->addr())), 474 _oops(parse_ic(ic_reloc->code(), ic_reloc->addr(), _oop_addr, &_is_optimized)) 475{ 476 assert(ic_reloc->type() == relocInfo::virtual_call_type || 477 ic_reloc->type() == relocInfo::opt_virtual_call_type, "wrong reloc. info"); 478} 479 480 481// ---------------------------------------------------------------------------- 482 483void CompiledStaticCall::set_to_clean() { 484 assert (CompiledIC_lock->is_locked() || SafepointSynchronize::is_at_safepoint(), "mt unsafe call"); 485 // Reset call site 486 MutexLockerEx pl(Patching_lock, Mutex::_no_safepoint_check_flag); 487#ifdef ASSERT 488 CodeBlob* cb = CodeCache::find_blob_unsafe(this); 489 assert(cb != NULL && cb->is_nmethod(), "must be nmethod"); 490#endif 491 set_destination_mt_safe(SharedRuntime::get_resolve_static_call_stub()); 492 493 // Do not reset stub here: It is too expensive to call find_stub. 494 // Instead, rely on caller (nmethod::clear_inline_caches) to clear 495 // both the call and its stub. 496} 497 498 499bool CompiledStaticCall::is_clean() const { 500 return destination() == SharedRuntime::get_resolve_static_call_stub(); 501} 502 503bool CompiledStaticCall::is_call_to_compiled() const { 504 return CodeCache::contains(destination()); 505} 506 507 508bool CompiledStaticCall::is_call_to_interpreted() const { 509 // It is a call to interpreted, if it calls to a stub. Hence, the destination 510 // must be in the stub part of the nmethod that contains the call 511 nmethod* nm = CodeCache::find_nmethod(instruction_address()); 512 return nm->stub_contains(destination()); 513} 514 515 516void CompiledStaticCall::set_to_interpreted(methodHandle callee, address entry) { 517 address stub=find_stub(); 518 assert(stub!=NULL, "stub not found"); 519 520 if (TraceICs) { 521 ResourceMark rm; 522 tty->print_cr("CompiledStaticCall@" INTPTR_FORMAT ": set_to_interpreted %s", 523 instruction_address(), 524 callee->name_and_sig_as_C_string()); 525 } 526 527 NativeMovConstReg* method_holder = nativeMovConstReg_at(stub); // creation also verifies the object 528 NativeJump* jump = nativeJump_at(method_holder->next_instruction_address()); 529 530 assert(method_holder->data() == 0 || method_holder->data() == (intptr_t)callee(), "a) MT-unsafe modification of inline cache"); 531 assert(jump->jump_destination() == (address)-1 || jump->jump_destination() == entry, "b) MT-unsafe modification of inline cache"); 532 533 // Update stub 534 method_holder->set_data((intptr_t)callee()); 535 jump->set_jump_destination(entry); 536 537 // Update jump to call 538 set_destination_mt_safe(stub); 539} 540 541 542void CompiledStaticCall::set(const StaticCallInfo& info) { 543 assert (CompiledIC_lock->is_locked() || SafepointSynchronize::is_at_safepoint(), "mt unsafe call"); 544 MutexLockerEx pl(Patching_lock, Mutex::_no_safepoint_check_flag); 545 // Updating a cache to the wrong entry can cause bugs that are very hard 546 // to track down - if cache entry gets invalid - we just clean it. In 547 // this way it is always the same code path that is responsible for 548 // updating and resolving an inline cache 549 assert(is_clean(), "do not update a call entry - use clean"); 550 551 if (info._to_interpreter) { 552 // Call to interpreted code 553 set_to_interpreted(info.callee(), info.entry()); 554 } else { 555 if (TraceICs) { 556 ResourceMark rm; 557 tty->print_cr("CompiledStaticCall@" INTPTR_FORMAT ": set_to_compiled " INTPTR_FORMAT, 558 instruction_address(), 559 info.entry()); 560 } 561 // Call to compiled code 562 assert (CodeCache::contains(info.entry()), "wrong entry point"); 563 set_destination_mt_safe(info.entry()); 564 } 565} 566 567 568// Compute settings for a CompiledStaticCall. Since we might have to set 569// the stub when calling to the interpreter, we need to return arguments. 570void CompiledStaticCall::compute_entry(methodHandle m, StaticCallInfo& info) { 571 nmethod* m_code = m->code(); 572 info._callee = m; 573 if (m_code != NULL) { 574 info._to_interpreter = false; 575 info._entry = m_code->verified_entry_point(); 576 } else { 577 // Callee is interpreted code. In any case entering the interpreter 578 // puts a converter-frame on the stack to save arguments. 579 info._to_interpreter = true; 580 info._entry = m()->get_c2i_entry(); 581 } 582} 583 584 585void CompiledStaticCall::set_stub_to_clean(static_stub_Relocation* static_stub) { 586 assert (CompiledIC_lock->is_locked() || SafepointSynchronize::is_at_safepoint(), "mt unsafe call"); 587 // Reset stub 588 address stub = static_stub->addr(); 589 assert(stub!=NULL, "stub not found"); 590 NativeMovConstReg* method_holder = nativeMovConstReg_at(stub); // creation also verifies the object 591 NativeJump* jump = nativeJump_at(method_holder->next_instruction_address()); 592 method_holder->set_data(0); 593 jump->set_jump_destination((address)-1); 594} 595 596 597address CompiledStaticCall::find_stub() { 598 // Find reloc. information containing this call-site 599 RelocIterator iter((nmethod*)NULL, instruction_address()); 600 while (iter.next()) { 601 if (iter.addr() == instruction_address()) { 602 switch(iter.type()) { 603 case relocInfo::static_call_type: 604 return iter.static_call_reloc()->static_stub(); 605 // We check here for opt_virtual_call_type, since we reuse the code 606 // from the CompiledIC implementation 607 case relocInfo::opt_virtual_call_type: 608 return iter.opt_virtual_call_reloc()->static_stub(); 609 case relocInfo::poll_type: 610 case relocInfo::poll_return_type: // A safepoint can't overlap a call. 611 default: 612 ShouldNotReachHere(); 613 } 614 } 615 } 616 return NULL; 617} 618 619 620//----------------------------------------------------------------------------- 621// Non-product mode code 622#ifndef PRODUCT 623 624void CompiledIC::verify() { 625 // make sure code pattern is actually a call imm32 instruction 626 _ic_call->verify(); 627 if (os::is_MP()) { 628 _ic_call->verify_alignment(); 629 } 630 assert(is_clean() || is_call_to_compiled() || is_call_to_interpreted() 631 || is_optimized() || is_megamorphic(), "sanity check"); 632} 633 634 635void CompiledIC::print() { 636 print_compiled_ic(); 637 tty->cr(); 638} 639 640 641void CompiledIC::print_compiled_ic() { 642 tty->print("Inline cache at " INTPTR_FORMAT ", calling %s " INTPTR_FORMAT, 643 instruction_address(), is_call_to_interpreted() ? "interpreted " : "", ic_destination()); 644} 645 646 647void CompiledStaticCall::print() { 648 tty->print("static call at " INTPTR_FORMAT " -> ", instruction_address()); 649 if (is_clean()) { 650 tty->print("clean"); 651 } else if (is_call_to_compiled()) { 652 tty->print("compiled"); 653 } else if (is_call_to_interpreted()) { 654 tty->print("interpreted"); 655 } 656 tty->cr(); 657} 658 659void CompiledStaticCall::verify() { 660 // Verify call 661 NativeCall::verify(); 662 if (os::is_MP()) { 663 verify_alignment(); 664 } 665 666 // Verify stub 667 address stub = find_stub(); 668 assert(stub != NULL, "no stub found for static call"); 669 NativeMovConstReg* method_holder = nativeMovConstReg_at(stub); // creation also verifies the object 670 NativeJump* jump = nativeJump_at(method_holder->next_instruction_address()); 671 672 // Verify state 673 assert(is_clean() || is_call_to_compiled() || is_call_to_interpreted(), "sanity check"); 674} 675 676#endif 677