Mercurial > hg > truffle
annotate src/share/vm/shark/sharkTopLevelBlock.cpp @ 5763:a3d71693e0ce
removed bytecode disassembly from CodeCacheRuntime into separate BytecodeDisassembler class
removed VM call for doing bytecode disassembly
added support for explicitly excluding classes from JaCoCo (put '// JaCoCo Exclude' somewhere in the source file)
added node intrinsics to MaterializeNode
added snippets for the UnsignedMath classes
each file opened by CFGPrinter now includes a unique id in its name to avoid a race of multiple threads writing to the same file
the IdealGraphPrinter uses the new BytecodeDisassembler mechanism
teh UnsignedMath class is exclude from JaCoCo processing as it is used in snippets
| author | Doug Simon <doug.simon@oracle.com> |
|---|---|
| date | Wed, 04 Jul 2012 21:57:49 +0200 |
| parents | 069ab3f976d3 |
| children | da91efe96a93 |
| rev | line source |
|---|---|
| 1692 | 1 /* |
| 1972 | 2 * Copyright (c) 1999, 2010, Oracle and/or its affiliates. All rights reserved. |
| 1692 | 3 * Copyright 2008, 2009, 2010 Red Hat, Inc. |
| 4 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. | |
| 5 * | |
| 6 * This code is free software; you can redistribute it and/or modify it | |
| 7 * under the terms of the GNU General Public License version 2 only, as | |
| 8 * published by the Free Software Foundation. | |
| 9 * | |
| 10 * This code is distributed in the hope that it will be useful, but WITHOUT | |
| 11 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
| 12 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
| 13 * version 2 for more details (a copy is included in the LICENSE file that | |
| 14 * accompanied this code). | |
| 15 * | |
| 16 * You should have received a copy of the GNU General Public License version | |
| 17 * 2 along with this work; if not, write to the Free Software Foundation, | |
| 18 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. | |
| 19 * | |
| 20 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA | |
| 21 * or visit www.oracle.com if you need additional information or have any | |
| 22 * questions. | |
| 23 * | |
| 24 */ | |
| 25 | |
| 1972 | 26 #include "precompiled.hpp" |
| 27 #include "ci/ciField.hpp" | |
| 28 #include "ci/ciInstance.hpp" | |
| 29 #include "ci/ciObjArrayKlass.hpp" | |
| 30 #include "ci/ciStreams.hpp" | |
| 31 #include "ci/ciType.hpp" | |
| 32 #include "ci/ciTypeFlow.hpp" | |
| 33 #include "interpreter/bytecodes.hpp" | |
| 34 #include "memory/allocation.hpp" | |
| 35 #include "runtime/deoptimization.hpp" | |
| 36 #include "shark/llvmHeaders.hpp" | |
| 37 #include "shark/llvmValue.hpp" | |
| 38 #include "shark/sharkBuilder.hpp" | |
| 39 #include "shark/sharkCacheDecache.hpp" | |
| 40 #include "shark/sharkConstant.hpp" | |
| 41 #include "shark/sharkInliner.hpp" | |
| 42 #include "shark/sharkState.hpp" | |
| 43 #include "shark/sharkTopLevelBlock.hpp" | |
| 44 #include "shark/sharkValue.hpp" | |
| 45 #include "shark/shark_globals.hpp" | |
| 46 #include "utilities/debug.hpp" | |
| 1692 | 47 |
| 48 using namespace llvm; | |
| 49 | |
| 50 void SharkTopLevelBlock::scan_for_traps() { | |
| 51 // If typeflow found a trap then don't scan past it | |
| 52 int limit_bci = ciblock()->has_trap() ? ciblock()->trap_bci() : limit(); | |
| 53 | |
| 54 // Scan the bytecode for traps that are always hit | |
| 55 iter()->reset_to_bci(start()); | |
| 56 while (iter()->next_bci() < limit_bci) { | |
| 57 iter()->next(); | |
| 58 | |
| 59 ciField *field; | |
| 60 ciMethod *method; | |
| 61 ciInstanceKlass *klass; | |
| 62 bool will_link; | |
| 63 bool is_field; | |
| 64 | |
| 65 switch (bc()) { | |
| 66 case Bytecodes::_ldc: | |
| 67 case Bytecodes::_ldc_w: | |
| 68 if (!SharkConstant::for_ldc(iter())->is_loaded()) { | |
| 69 set_trap( | |
| 70 Deoptimization::make_trap_request( | |
| 71 Deoptimization::Reason_uninitialized, | |
| 72 Deoptimization::Action_reinterpret), bci()); | |
| 73 return; | |
| 74 } | |
| 75 break; | |
| 76 | |
| 77 case Bytecodes::_getfield: | |
| 78 case Bytecodes::_getstatic: | |
| 79 case Bytecodes::_putfield: | |
| 80 case Bytecodes::_putstatic: | |
| 81 field = iter()->get_field(will_link); | |
| 82 assert(will_link, "typeflow responsibility"); | |
| 83 is_field = (bc() == Bytecodes::_getfield || bc() == Bytecodes::_putfield); | |
| 84 | |
| 85 // If the bytecode does not match the field then bail out to | |
| 86 // the interpreter to throw an IncompatibleClassChangeError | |
| 87 if (is_field == field->is_static()) { | |
| 88 set_trap( | |
| 89 Deoptimization::make_trap_request( | |
| 90 Deoptimization::Reason_unhandled, | |
| 91 Deoptimization::Action_none), bci()); | |
| 92 return; | |
| 93 } | |
| 94 | |
| 95 // Bail out if we are trying to access a static variable | |
| 96 // before the class initializer has completed. | |
| 97 if (!is_field && !field->holder()->is_initialized()) { | |
| 98 if (!static_field_ok_in_clinit(field)) { | |
| 99 set_trap( | |
| 100 Deoptimization::make_trap_request( | |
| 101 Deoptimization::Reason_uninitialized, | |
| 102 Deoptimization::Action_reinterpret), bci()); | |
| 103 return; | |
| 104 } | |
| 105 } | |
| 106 break; | |
| 107 | |
| 108 case Bytecodes::_invokestatic: | |
| 109 case Bytecodes::_invokespecial: | |
| 110 case Bytecodes::_invokevirtual: | |
| 111 case Bytecodes::_invokeinterface: | |
| 112 method = iter()->get_method(will_link); | |
| 113 assert(will_link, "typeflow responsibility"); | |
| 114 | |
| 115 if (!method->holder()->is_linked()) { | |
| 116 set_trap( | |
| 117 Deoptimization::make_trap_request( | |
| 118 Deoptimization::Reason_uninitialized, | |
| 119 Deoptimization::Action_reinterpret), bci()); | |
| 120 return; | |
| 121 } | |
| 122 | |
| 123 if (bc() == Bytecodes::_invokevirtual) { | |
| 124 klass = ciEnv::get_instance_klass_for_declared_method_holder( | |
| 125 iter()->get_declared_method_holder()); | |
| 126 if (!klass->is_linked()) { | |
| 127 set_trap( | |
| 128 Deoptimization::make_trap_request( | |
| 129 Deoptimization::Reason_uninitialized, | |
| 130 Deoptimization::Action_reinterpret), bci()); | |
| 131 return; | |
| 132 } | |
| 133 } | |
| 134 break; | |
| 135 | |
| 136 case Bytecodes::_new: | |
| 137 klass = iter()->get_klass(will_link)->as_instance_klass(); | |
| 138 assert(will_link, "typeflow responsibility"); | |
| 139 | |
| 140 // Bail out if the class is unloaded | |
| 141 if (iter()->is_unresolved_klass() || !klass->is_initialized()) { | |
| 142 set_trap( | |
| 143 Deoptimization::make_trap_request( | |
| 144 Deoptimization::Reason_uninitialized, | |
| 145 Deoptimization::Action_reinterpret), bci()); | |
| 146 return; | |
| 147 } | |
| 148 | |
| 149 // Bail out if the class cannot be instantiated | |
| 150 if (klass->is_abstract() || klass->is_interface() || | |
| 151 klass->name() == ciSymbol::java_lang_Class()) { | |
| 152 set_trap( | |
| 153 Deoptimization::make_trap_request( | |
| 154 Deoptimization::Reason_unhandled, | |
| 155 Deoptimization::Action_reinterpret), bci()); | |
| 156 return; | |
| 157 } | |
| 158 break; | |
| 159 } | |
| 160 } | |
| 161 | |
| 162 // Trap if typeflow trapped (and we didn't before) | |
| 163 if (ciblock()->has_trap()) { | |
| 164 set_trap( | |
| 165 Deoptimization::make_trap_request( | |
| 166 Deoptimization::Reason_unloaded, | |
| 167 Deoptimization::Action_reinterpret, | |
| 168 ciblock()->trap_index()), ciblock()->trap_bci()); | |
| 169 return; | |
| 170 } | |
| 171 } | |
| 172 | |
| 173 bool SharkTopLevelBlock::static_field_ok_in_clinit(ciField* field) { | |
| 174 assert(field->is_static(), "should be"); | |
| 175 | |
| 176 // This code is lifted pretty much verbatim from C2's | |
| 177 // Parse::static_field_ok_in_clinit() in parse3.cpp. | |
| 178 bool access_OK = false; | |
| 179 if (target()->holder()->is_subclass_of(field->holder())) { | |
| 180 if (target()->is_static()) { | |
| 181 if (target()->name() == ciSymbol::class_initializer_name()) { | |
| 182 // It's OK to access static fields from the class initializer | |
| 183 access_OK = true; | |
| 184 } | |
| 185 } | |
| 186 else { | |
| 187 if (target()->name() == ciSymbol::object_initializer_name()) { | |
| 188 // It's also OK to access static fields inside a constructor, | |
| 189 // because any thread calling the constructor must first have | |
| 190 // synchronized on the class by executing a "new" bytecode. | |
| 191 access_OK = true; | |
| 192 } | |
| 193 } | |
| 194 } | |
| 195 return access_OK; | |
| 196 } | |
| 197 | |
| 198 SharkState* SharkTopLevelBlock::entry_state() { | |
| 199 if (_entry_state == NULL) { | |
| 200 assert(needs_phis(), "should do"); | |
| 201 _entry_state = new SharkPHIState(this); | |
| 202 } | |
| 203 return _entry_state; | |
| 204 } | |
| 205 | |
| 206 void SharkTopLevelBlock::add_incoming(SharkState* incoming_state) { | |
| 207 if (needs_phis()) { | |
| 208 ((SharkPHIState *) entry_state())->add_incoming(incoming_state); | |
| 209 } | |
| 210 else if (_entry_state == NULL) { | |
| 211 _entry_state = incoming_state; | |
| 212 } | |
| 213 else { | |
| 214 assert(entry_state()->equal_to(incoming_state), "should be"); | |
| 215 } | |
| 216 } | |
| 217 | |
| 218 void SharkTopLevelBlock::enter(SharkTopLevelBlock* predecessor, | |
| 219 bool is_exception) { | |
| 220 // This block requires phis: | |
| 221 // - if it is entered more than once | |
| 222 // - if it is an exception handler, because in which | |
| 223 // case we assume it's entered more than once. | |
| 224 // - if the predecessor will be compiled after this | |
| 225 // block, in which case we can't simple propagate | |
| 226 // the state forward. | |
| 227 if (!needs_phis() && | |
| 228 (entered() || | |
| 229 is_exception || | |
| 230 (predecessor && predecessor->index() >= index()))) | |
| 231 _needs_phis = true; | |
| 232 | |
| 233 // Recurse into the tree | |
| 234 if (!entered()) { | |
| 235 _entered = true; | |
| 236 | |
| 237 scan_for_traps(); | |
| 238 if (!has_trap()) { | |
| 239 for (int i = 0; i < num_successors(); i++) { | |
| 240 successor(i)->enter(this, false); | |
| 241 } | |
| 242 } | |
| 243 compute_exceptions(); | |
| 244 for (int i = 0; i < num_exceptions(); i++) { | |
| 245 SharkTopLevelBlock *handler = exception(i); | |
| 246 if (handler) | |
| 247 handler->enter(this, true); | |
| 248 } | |
| 249 } | |
| 250 } | |
| 251 | |
| 252 void SharkTopLevelBlock::initialize() { | |
| 253 char name[28]; | |
| 254 snprintf(name, sizeof(name), | |
| 255 "bci_%d%s", | |
| 256 start(), is_backedge_copy() ? "_backedge_copy" : ""); | |
| 257 _entry_block = function()->CreateBlock(name); | |
| 258 } | |
| 259 | |
| 260 void SharkTopLevelBlock::decache_for_Java_call(ciMethod *callee) { | |
| 261 SharkJavaCallDecacher(function(), bci(), callee).scan(current_state()); | |
| 262 for (int i = 0; i < callee->arg_size(); i++) | |
| 263 xpop(); | |
| 264 } | |
| 265 | |
| 266 void SharkTopLevelBlock::cache_after_Java_call(ciMethod *callee) { | |
| 267 if (callee->return_type()->size()) { | |
| 268 ciType *type; | |
| 269 switch (callee->return_type()->basic_type()) { | |
| 270 case T_BOOLEAN: | |
| 271 case T_BYTE: | |
| 272 case T_CHAR: | |
| 273 case T_SHORT: | |
| 274 type = ciType::make(T_INT); | |
| 275 break; | |
| 276 | |
| 277 default: | |
| 278 type = callee->return_type(); | |
| 279 } | |
| 280 | |
| 281 push(SharkValue::create_generic(type, NULL, false)); | |
| 282 } | |
| 283 SharkJavaCallCacher(function(), callee).scan(current_state()); | |
| 284 } | |
| 285 | |
| 286 void SharkTopLevelBlock::decache_for_VM_call() { | |
| 287 SharkVMCallDecacher(function(), bci()).scan(current_state()); | |
| 288 } | |
| 289 | |
| 290 void SharkTopLevelBlock::cache_after_VM_call() { | |
| 291 SharkVMCallCacher(function()).scan(current_state()); | |
| 292 } | |
| 293 | |
| 294 void SharkTopLevelBlock::decache_for_trap() { | |
| 295 SharkTrapDecacher(function(), bci()).scan(current_state()); | |
| 296 } | |
| 297 | |
| 298 void SharkTopLevelBlock::emit_IR() { | |
| 299 builder()->SetInsertPoint(entry_block()); | |
| 300 | |
| 301 // Parse the bytecode | |
| 302 parse_bytecode(start(), limit()); | |
| 303 | |
| 304 // If this block falls through to the next then it won't have been | |
| 305 // terminated by a bytecode and we have to add the branch ourselves | |
| 306 if (falls_through() && !has_trap()) | |
| 307 do_branch(ciTypeFlow::FALL_THROUGH); | |
| 308 } | |
| 309 | |
| 310 SharkTopLevelBlock* SharkTopLevelBlock::bci_successor(int bci) const { | |
| 311 // XXX now with Linear Search Technology (tm) | |
| 312 for (int i = 0; i < num_successors(); i++) { | |
| 313 ciTypeFlow::Block *successor = ciblock()->successors()->at(i); | |
| 314 if (successor->start() == bci) | |
| 315 return function()->block(successor->pre_order()); | |
| 316 } | |
| 317 ShouldNotReachHere(); | |
| 318 } | |
| 319 | |
| 320 void SharkTopLevelBlock::do_zero_check(SharkValue *value) { | |
| 321 if (value->is_phi() && value->as_phi()->all_incomers_zero_checked()) { | |
| 322 function()->add_deferred_zero_check(this, value); | |
| 323 } | |
| 324 else { | |
| 325 BasicBlock *continue_block = function()->CreateBlock("not_zero"); | |
| 326 SharkState *saved_state = current_state(); | |
| 327 set_current_state(saved_state->copy()); | |
| 328 zero_check_value(value, continue_block); | |
| 329 builder()->SetInsertPoint(continue_block); | |
| 330 set_current_state(saved_state); | |
| 331 } | |
| 332 | |
| 333 value->set_zero_checked(true); | |
| 334 } | |
| 335 | |
| 336 void SharkTopLevelBlock::do_deferred_zero_check(SharkValue* value, | |
| 337 int bci, | |
| 338 SharkState* saved_state, | |
| 339 BasicBlock* continue_block) { | |
| 340 if (value->as_phi()->all_incomers_zero_checked()) { | |
| 341 builder()->CreateBr(continue_block); | |
| 342 } | |
| 343 else { | |
| 344 iter()->force_bci(start()); | |
| 345 set_current_state(saved_state); | |
| 346 zero_check_value(value, continue_block); | |
| 347 } | |
| 348 } | |
| 349 | |
| 350 void SharkTopLevelBlock::zero_check_value(SharkValue* value, | |
| 351 BasicBlock* continue_block) { | |
| 352 BasicBlock *zero_block = builder()->CreateBlock(continue_block, "zero"); | |
| 353 | |
| 354 Value *a, *b; | |
| 355 switch (value->basic_type()) { | |
| 356 case T_BYTE: | |
| 357 case T_CHAR: | |
| 358 case T_SHORT: | |
| 359 case T_INT: | |
| 360 a = value->jint_value(); | |
| 361 b = LLVMValue::jint_constant(0); | |
| 362 break; | |
| 363 case T_LONG: | |
| 364 a = value->jlong_value(); | |
| 365 b = LLVMValue::jlong_constant(0); | |
| 366 break; | |
| 367 case T_OBJECT: | |
| 368 case T_ARRAY: | |
| 369 a = value->jobject_value(); | |
| 370 b = LLVMValue::LLVMValue::null(); | |
| 371 break; | |
| 372 default: | |
| 373 tty->print_cr("Unhandled type %s", type2name(value->basic_type())); | |
| 374 ShouldNotReachHere(); | |
| 375 } | |
| 376 | |
| 377 builder()->CreateCondBr( | |
| 378 builder()->CreateICmpNE(a, b), continue_block, zero_block); | |
| 379 | |
| 380 builder()->SetInsertPoint(zero_block); | |
| 381 if (value->is_jobject()) { | |
| 382 call_vm( | |
| 383 builder()->throw_NullPointerException(), | |
| 384 builder()->CreateIntToPtr( | |
| 385 LLVMValue::intptr_constant((intptr_t) __FILE__), | |
| 386 PointerType::getUnqual(SharkType::jbyte_type())), | |
| 387 LLVMValue::jint_constant(__LINE__), | |
| 388 EX_CHECK_NONE); | |
| 389 } | |
| 390 else { | |
| 391 call_vm( | |
| 392 builder()->throw_ArithmeticException(), | |
| 393 builder()->CreateIntToPtr( | |
| 394 LLVMValue::intptr_constant((intptr_t) __FILE__), | |
| 395 PointerType::getUnqual(SharkType::jbyte_type())), | |
| 396 LLVMValue::jint_constant(__LINE__), | |
| 397 EX_CHECK_NONE); | |
| 398 } | |
| 399 | |
| 400 Value *pending_exception = get_pending_exception(); | |
| 401 clear_pending_exception(); | |
| 402 handle_exception(pending_exception, EX_CHECK_FULL); | |
| 403 } | |
| 404 | |
| 405 void SharkTopLevelBlock::check_bounds(SharkValue* array, SharkValue* index) { | |
| 406 BasicBlock *out_of_bounds = function()->CreateBlock("out_of_bounds"); | |
| 407 BasicBlock *in_bounds = function()->CreateBlock("in_bounds"); | |
| 408 | |
| 409 Value *length = builder()->CreateArrayLength(array->jarray_value()); | |
| 410 // we use an unsigned comparison to catch negative values | |
| 411 builder()->CreateCondBr( | |
| 412 builder()->CreateICmpULT(index->jint_value(), length), | |
| 413 in_bounds, out_of_bounds); | |
| 414 | |
| 415 builder()->SetInsertPoint(out_of_bounds); | |
| 416 SharkState *saved_state = current_state()->copy(); | |
| 417 | |
| 418 call_vm( | |
| 419 builder()->throw_ArrayIndexOutOfBoundsException(), | |
| 420 builder()->CreateIntToPtr( | |
| 421 LLVMValue::intptr_constant((intptr_t) __FILE__), | |
| 422 PointerType::getUnqual(SharkType::jbyte_type())), | |
| 423 LLVMValue::jint_constant(__LINE__), | |
| 424 index->jint_value(), | |
| 425 EX_CHECK_NONE); | |
| 426 | |
| 427 Value *pending_exception = get_pending_exception(); | |
| 428 clear_pending_exception(); | |
| 429 handle_exception(pending_exception, EX_CHECK_FULL); | |
| 430 | |
| 431 set_current_state(saved_state); | |
| 432 | |
| 433 builder()->SetInsertPoint(in_bounds); | |
| 434 } | |
| 435 | |
| 436 void SharkTopLevelBlock::check_pending_exception(int action) { | |
| 437 assert(action & EAM_CHECK, "should be"); | |
| 438 | |
| 439 BasicBlock *exception = function()->CreateBlock("exception"); | |
| 440 BasicBlock *no_exception = function()->CreateBlock("no_exception"); | |
| 441 | |
| 442 Value *pending_exception = get_pending_exception(); | |
| 443 builder()->CreateCondBr( | |
| 444 builder()->CreateICmpEQ(pending_exception, LLVMValue::null()), | |
| 445 no_exception, exception); | |
| 446 | |
| 447 builder()->SetInsertPoint(exception); | |
| 448 SharkState *saved_state = current_state()->copy(); | |
| 449 if (action & EAM_MONITOR_FUDGE) { | |
| 450 // The top monitor is marked live, but the exception was thrown | |
| 451 // while setting it up so we need to mark it dead before we enter | |
| 452 // any exception handlers as they will not expect it to be there. | |
| 453 set_num_monitors(num_monitors() - 1); | |
| 454 action ^= EAM_MONITOR_FUDGE; | |
| 455 } | |
| 456 clear_pending_exception(); | |
| 457 handle_exception(pending_exception, action); | |
| 458 set_current_state(saved_state); | |
| 459 | |
| 460 builder()->SetInsertPoint(no_exception); | |
| 461 } | |
| 462 | |
| 463 void SharkTopLevelBlock::compute_exceptions() { | |
| 464 ciExceptionHandlerStream str(target(), start()); | |
| 465 | |
| 466 int exc_count = str.count(); | |
| 467 _exc_handlers = new GrowableArray<ciExceptionHandler*>(exc_count); | |
| 468 _exceptions = new GrowableArray<SharkTopLevelBlock*>(exc_count); | |
| 469 | |
| 470 int index = 0; | |
| 471 for (; !str.is_done(); str.next()) { | |
| 472 ciExceptionHandler *handler = str.handler(); | |
| 473 if (handler->handler_bci() == -1) | |
| 474 break; | |
| 475 _exc_handlers->append(handler); | |
| 476 | |
| 477 // Try and get this exception's handler from typeflow. We should | |
| 478 // do it this way always, really, except that typeflow sometimes | |
| 479 // doesn't record exceptions, even loaded ones, and sometimes it | |
| 480 // returns them with a different handler bci. Why??? | |
| 481 SharkTopLevelBlock *block = NULL; | |
| 482 ciInstanceKlass* klass; | |
| 483 if (handler->is_catch_all()) { | |
| 484 klass = java_lang_Throwable_klass(); | |
| 485 } | |
| 486 else { | |
| 487 klass = handler->catch_klass(); | |
| 488 } | |
| 489 for (int i = 0; i < ciblock()->exceptions()->length(); i++) { | |
| 490 if (klass == ciblock()->exc_klasses()->at(i)) { | |
| 491 block = function()->block(ciblock()->exceptions()->at(i)->pre_order()); | |
| 492 if (block->start() == handler->handler_bci()) | |
| 493 break; | |
| 494 else | |
| 495 block = NULL; | |
| 496 } | |
| 497 } | |
| 498 | |
| 499 // If typeflow let us down then try and figure it out ourselves | |
| 500 if (block == NULL) { | |
| 501 for (int i = 0; i < function()->block_count(); i++) { | |
| 502 SharkTopLevelBlock *candidate = function()->block(i); | |
| 503 if (candidate->start() == handler->handler_bci()) { | |
| 504 if (block != NULL) { | |
| 505 NOT_PRODUCT(warning("there may be trouble ahead")); | |
| 506 block = NULL; | |
| 507 break; | |
| 508 } | |
| 509 block = candidate; | |
| 510 } | |
| 511 } | |
| 512 } | |
| 513 _exceptions->append(block); | |
| 514 } | |
| 515 } | |
| 516 | |
| 517 void SharkTopLevelBlock::handle_exception(Value* exception, int action) { | |
| 518 if (action & EAM_HANDLE && num_exceptions() != 0) { | |
| 519 // Clear the stack and push the exception onto it | |
| 520 while (xstack_depth()) | |
| 521 pop(); | |
| 522 push(SharkValue::create_jobject(exception, true)); | |
| 523 | |
| 524 // Work out how many options we have to check | |
| 525 bool has_catch_all = exc_handler(num_exceptions() - 1)->is_catch_all(); | |
| 526 int num_options = num_exceptions(); | |
| 527 if (has_catch_all) | |
| 528 num_options--; | |
| 529 | |
| 530 // Marshal any non-catch-all handlers | |
| 531 if (num_options > 0) { | |
| 532 bool all_loaded = true; | |
| 533 for (int i = 0; i < num_options; i++) { | |
| 534 if (!exc_handler(i)->catch_klass()->is_loaded()) { | |
| 535 all_loaded = false; | |
| 536 break; | |
| 537 } | |
| 538 } | |
| 539 | |
| 540 if (all_loaded) | |
| 541 marshal_exception_fast(num_options); | |
| 542 else | |
| 543 marshal_exception_slow(num_options); | |
| 544 } | |
| 545 | |
| 546 // Install the catch-all handler, if present | |
| 547 if (has_catch_all) { | |
| 548 SharkTopLevelBlock* handler = this->exception(num_options); | |
| 549 assert(handler != NULL, "catch-all handler cannot be unloaded"); | |
| 550 | |
| 551 builder()->CreateBr(handler->entry_block()); | |
| 552 handler->add_incoming(current_state()); | |
| 553 return; | |
| 554 } | |
| 555 } | |
| 556 | |
| 557 // No exception handler was found; unwind and return | |
| 558 handle_return(T_VOID, exception); | |
| 559 } | |
| 560 | |
| 561 void SharkTopLevelBlock::marshal_exception_fast(int num_options) { | |
| 562 Value *exception_klass = builder()->CreateValueOfStructEntry( | |
| 563 xstack(0)->jobject_value(), | |
| 564 in_ByteSize(oopDesc::klass_offset_in_bytes()), | |
| 565 SharkType::oop_type(), | |
| 566 "exception_klass"); | |
| 567 | |
| 568 for (int i = 0; i < num_options; i++) { | |
| 569 Value *check_klass = | |
| 570 builder()->CreateInlineOop(exc_handler(i)->catch_klass()); | |
| 571 | |
| 572 BasicBlock *not_exact = function()->CreateBlock("not_exact"); | |
| 573 BasicBlock *not_subtype = function()->CreateBlock("not_subtype"); | |
| 574 | |
| 575 builder()->CreateCondBr( | |
| 576 builder()->CreateICmpEQ(check_klass, exception_klass), | |
| 577 handler_for_exception(i), not_exact); | |
| 578 | |
| 579 builder()->SetInsertPoint(not_exact); | |
| 580 builder()->CreateCondBr( | |
| 581 builder()->CreateICmpNE( | |
| 582 builder()->CreateCall2( | |
| 583 builder()->is_subtype_of(), check_klass, exception_klass), | |
| 584 LLVMValue::jbyte_constant(0)), | |
| 585 handler_for_exception(i), not_subtype); | |
| 586 | |
| 587 builder()->SetInsertPoint(not_subtype); | |
| 588 } | |
| 589 } | |
| 590 | |
| 591 void SharkTopLevelBlock::marshal_exception_slow(int num_options) { | |
| 592 int *indexes = NEW_RESOURCE_ARRAY(int, num_options); | |
| 593 for (int i = 0; i < num_options; i++) | |
| 594 indexes[i] = exc_handler(i)->catch_klass_index(); | |
| 595 | |
| 596 Value *index = call_vm( | |
| 597 builder()->find_exception_handler(), | |
| 598 builder()->CreateInlineData( | |
| 599 indexes, | |
| 600 num_options * sizeof(int), | |
| 601 PointerType::getUnqual(SharkType::jint_type())), | |
| 602 LLVMValue::jint_constant(num_options), | |
| 603 EX_CHECK_NO_CATCH); | |
| 604 | |
| 605 BasicBlock *no_handler = function()->CreateBlock("no_handler"); | |
| 606 SwitchInst *switchinst = builder()->CreateSwitch( | |
| 607 index, no_handler, num_options); | |
| 608 | |
| 609 for (int i = 0; i < num_options; i++) { | |
| 610 switchinst->addCase( | |
| 611 LLVMValue::jint_constant(i), | |
| 612 handler_for_exception(i)); | |
| 613 } | |
| 614 | |
| 615 builder()->SetInsertPoint(no_handler); | |
| 616 } | |
| 617 | |
| 618 BasicBlock* SharkTopLevelBlock::handler_for_exception(int index) { | |
| 619 SharkTopLevelBlock *successor = this->exception(index); | |
| 620 if (successor) { | |
| 621 successor->add_incoming(current_state()); | |
| 622 return successor->entry_block(); | |
| 623 } | |
| 624 else { | |
| 625 return make_trap( | |
| 626 exc_handler(index)->handler_bci(), | |
| 627 Deoptimization::make_trap_request( | |
| 628 Deoptimization::Reason_unhandled, | |
| 629 Deoptimization::Action_reinterpret)); | |
| 630 } | |
| 631 } | |
| 632 | |
| 633 void SharkTopLevelBlock::maybe_add_safepoint() { | |
| 634 if (current_state()->has_safepointed()) | |
| 635 return; | |
| 636 | |
| 637 BasicBlock *orig_block = builder()->GetInsertBlock(); | |
| 638 SharkState *orig_state = current_state()->copy(); | |
| 639 | |
| 640 BasicBlock *do_safepoint = function()->CreateBlock("do_safepoint"); | |
| 641 BasicBlock *safepointed = function()->CreateBlock("safepointed"); | |
| 642 | |
| 643 Value *state = builder()->CreateLoad( | |
| 644 builder()->CreateIntToPtr( | |
| 645 LLVMValue::intptr_constant( | |
| 646 (intptr_t) SafepointSynchronize::address_of_state()), | |
| 647 PointerType::getUnqual(SharkType::jint_type())), | |
| 648 "state"); | |
| 649 | |
| 650 builder()->CreateCondBr( | |
| 651 builder()->CreateICmpEQ( | |
| 652 state, | |
| 653 LLVMValue::jint_constant(SafepointSynchronize::_synchronizing)), | |
| 654 do_safepoint, safepointed); | |
| 655 | |
| 656 builder()->SetInsertPoint(do_safepoint); | |
| 657 call_vm(builder()->safepoint(), EX_CHECK_FULL); | |
| 658 BasicBlock *safepointed_block = builder()->GetInsertBlock(); | |
| 659 builder()->CreateBr(safepointed); | |
| 660 | |
| 661 builder()->SetInsertPoint(safepointed); | |
| 662 current_state()->merge(orig_state, orig_block, safepointed_block); | |
| 663 | |
| 664 current_state()->set_has_safepointed(true); | |
| 665 } | |
| 666 | |
| 667 void SharkTopLevelBlock::maybe_add_backedge_safepoint() { | |
| 668 if (current_state()->has_safepointed()) | |
| 669 return; | |
| 670 | |
| 671 for (int i = 0; i < num_successors(); i++) { | |
| 672 if (successor(i)->can_reach(this)) { | |
| 673 maybe_add_safepoint(); | |
| 674 break; | |
| 675 } | |
| 676 } | |
| 677 } | |
| 678 | |
| 679 bool SharkTopLevelBlock::can_reach(SharkTopLevelBlock* other) { | |
| 680 for (int i = 0; i < function()->block_count(); i++) | |
| 681 function()->block(i)->_can_reach_visited = false; | |
| 682 | |
| 683 return can_reach_helper(other); | |
| 684 } | |
| 685 | |
| 686 bool SharkTopLevelBlock::can_reach_helper(SharkTopLevelBlock* other) { | |
| 687 if (this == other) | |
| 688 return true; | |
| 689 | |
| 690 if (_can_reach_visited) | |
| 691 return false; | |
| 692 _can_reach_visited = true; | |
| 693 | |
| 694 if (!has_trap()) { | |
| 695 for (int i = 0; i < num_successors(); i++) { | |
| 696 if (successor(i)->can_reach_helper(other)) | |
| 697 return true; | |
| 698 } | |
| 699 } | |
| 700 | |
| 701 for (int i = 0; i < num_exceptions(); i++) { | |
| 702 SharkTopLevelBlock *handler = exception(i); | |
| 703 if (handler && handler->can_reach_helper(other)) | |
| 704 return true; | |
| 705 } | |
| 706 | |
| 707 return false; | |
| 708 } | |
| 709 | |
| 710 BasicBlock* SharkTopLevelBlock::make_trap(int trap_bci, int trap_request) { | |
| 711 BasicBlock *trap_block = function()->CreateBlock("trap"); | |
| 712 BasicBlock *orig_block = builder()->GetInsertBlock(); | |
| 713 builder()->SetInsertPoint(trap_block); | |
| 714 | |
| 715 int orig_bci = bci(); | |
| 716 iter()->force_bci(trap_bci); | |
| 717 | |
| 718 do_trap(trap_request); | |
| 719 | |
| 720 builder()->SetInsertPoint(orig_block); | |
| 721 iter()->force_bci(orig_bci); | |
| 722 | |
| 723 return trap_block; | |
| 724 } | |
| 725 | |
| 726 void SharkTopLevelBlock::do_trap(int trap_request) { | |
| 727 decache_for_trap(); | |
| 728 builder()->CreateRet( | |
| 729 builder()->CreateCall2( | |
| 730 builder()->uncommon_trap(), | |
| 731 thread(), | |
| 732 LLVMValue::jint_constant(trap_request))); | |
| 733 } | |
| 734 | |
| 735 void SharkTopLevelBlock::call_register_finalizer(Value *receiver) { | |
| 736 BasicBlock *orig_block = builder()->GetInsertBlock(); | |
| 737 SharkState *orig_state = current_state()->copy(); | |
| 738 | |
| 739 BasicBlock *do_call = function()->CreateBlock("has_finalizer"); | |
| 740 BasicBlock *done = function()->CreateBlock("done"); | |
| 741 | |
| 742 Value *klass = builder()->CreateValueOfStructEntry( | |
| 743 receiver, | |
| 744 in_ByteSize(oopDesc::klass_offset_in_bytes()), | |
| 745 SharkType::oop_type(), | |
| 746 "klass"); | |
| 747 | |
|
4762
069ab3f976d3
7118863: Move sizeof(klassOopDesc) into the *Klass::*_offset_in_bytes() functions
stefank
parents:
1972
diff
changeset
|
748 Value *access_flags = builder()->CreateValueOfStructEntry( |
| 1692 | 749 klass, |
|
4762
069ab3f976d3
7118863: Move sizeof(klassOopDesc) into the *Klass::*_offset_in_bytes() functions
stefank
parents:
1972
diff
changeset
|
750 Klass::access_flags_offset(), |
| 1692 | 751 SharkType::jint_type(), |
| 752 "access_flags"); | |
| 753 | |
| 754 builder()->CreateCondBr( | |
| 755 builder()->CreateICmpNE( | |
| 756 builder()->CreateAnd( | |
| 757 access_flags, | |
| 758 LLVMValue::jint_constant(JVM_ACC_HAS_FINALIZER)), | |
| 759 LLVMValue::jint_constant(0)), | |
| 760 do_call, done); | |
| 761 | |
| 762 builder()->SetInsertPoint(do_call); | |
| 763 call_vm(builder()->register_finalizer(), receiver, EX_CHECK_FULL); | |
| 764 BasicBlock *branch_block = builder()->GetInsertBlock(); | |
| 765 builder()->CreateBr(done); | |
| 766 | |
| 767 builder()->SetInsertPoint(done); | |
| 768 current_state()->merge(orig_state, orig_block, branch_block); | |
| 769 } | |
| 770 | |
| 771 void SharkTopLevelBlock::handle_return(BasicType type, Value* exception) { | |
| 772 assert (exception == NULL || type == T_VOID, "exception OR result, please"); | |
| 773 | |
| 774 if (num_monitors()) { | |
| 775 // Protect our exception across possible monitor release decaches | |
| 776 if (exception) | |
| 777 set_oop_tmp(exception); | |
| 778 | |
| 779 // We don't need to check for exceptions thrown here. If | |
| 780 // we're returning a value then we just carry on as normal: | |
| 781 // the caller will see the pending exception and handle it. | |
| 782 // If we're returning with an exception then that exception | |
| 783 // takes priority and the release_lock one will be ignored. | |
| 784 while (num_monitors()) | |
| 785 release_lock(EX_CHECK_NONE); | |
| 786 | |
| 787 // Reload the exception we're throwing | |
| 788 if (exception) | |
| 789 exception = get_oop_tmp(); | |
| 790 } | |
| 791 | |
| 792 if (exception) { | |
| 793 builder()->CreateStore(exception, pending_exception_address()); | |
| 794 } | |
| 795 | |
| 796 Value *result_addr = stack()->CreatePopFrame(type2size[type]); | |
| 797 if (type != T_VOID) { | |
| 798 builder()->CreateStore( | |
| 799 pop_result(type)->generic_value(), | |
| 800 builder()->CreateIntToPtr( | |
| 801 result_addr, | |
| 802 PointerType::getUnqual(SharkType::to_stackType(type)))); | |
| 803 } | |
| 804 | |
| 805 builder()->CreateRet(LLVMValue::jint_constant(0)); | |
| 806 } | |
| 807 | |
| 808 void SharkTopLevelBlock::do_arraylength() { | |
| 809 SharkValue *array = pop(); | |
| 810 check_null(array); | |
| 811 Value *length = builder()->CreateArrayLength(array->jarray_value()); | |
| 812 push(SharkValue::create_jint(length, false)); | |
| 813 } | |
| 814 | |
| 815 void SharkTopLevelBlock::do_aload(BasicType basic_type) { | |
| 816 SharkValue *index = pop(); | |
| 817 SharkValue *array = pop(); | |
| 818 | |
| 819 check_null(array); | |
| 820 check_bounds(array, index); | |
| 821 | |
| 822 Value *value = builder()->CreateLoad( | |
| 823 builder()->CreateArrayAddress( | |
| 824 array->jarray_value(), basic_type, index->jint_value())); | |
| 825 | |
| 826 const Type *stack_type = SharkType::to_stackType(basic_type); | |
| 827 if (value->getType() != stack_type) | |
| 828 value = builder()->CreateIntCast(value, stack_type, basic_type != T_CHAR); | |
| 829 | |
| 830 switch (basic_type) { | |
| 831 case T_BYTE: | |
| 832 case T_CHAR: | |
| 833 case T_SHORT: | |
| 834 case T_INT: | |
| 835 push(SharkValue::create_jint(value, false)); | |
| 836 break; | |
| 837 | |
| 838 case T_LONG: | |
| 839 push(SharkValue::create_jlong(value, false)); | |
| 840 break; | |
| 841 | |
| 842 case T_FLOAT: | |
| 843 push(SharkValue::create_jfloat(value)); | |
| 844 break; | |
| 845 | |
| 846 case T_DOUBLE: | |
| 847 push(SharkValue::create_jdouble(value)); | |
| 848 break; | |
| 849 | |
| 850 case T_OBJECT: | |
| 851 // You might expect that array->type()->is_array_klass() would | |
| 852 // always be true, but it isn't. If ciTypeFlow detects that a | |
| 853 // value is always null then that value becomes an untyped null | |
| 854 // object. Shark doesn't presently support this, so a generic | |
| 855 // T_OBJECT is created. In this case we guess the type using | |
| 856 // the BasicType we were supplied. In reality the generated | |
| 857 // code will never be used, as the null value will be caught | |
| 858 // by the above null pointer check. | |
| 859 // http://icedtea.classpath.org/bugzilla/show_bug.cgi?id=324 | |
| 860 push( | |
| 861 SharkValue::create_generic( | |
| 862 array->type()->is_array_klass() ? | |
| 863 ((ciArrayKlass *) array->type())->element_type() : | |
| 864 ciType::make(basic_type), | |
| 865 value, false)); | |
| 866 break; | |
| 867 | |
| 868 default: | |
| 869 tty->print_cr("Unhandled type %s", type2name(basic_type)); | |
| 870 ShouldNotReachHere(); | |
| 871 } | |
| 872 } | |
| 873 | |
| 874 void SharkTopLevelBlock::do_astore(BasicType basic_type) { | |
| 875 SharkValue *svalue = pop(); | |
| 876 SharkValue *index = pop(); | |
| 877 SharkValue *array = pop(); | |
| 878 | |
| 879 check_null(array); | |
| 880 check_bounds(array, index); | |
| 881 | |
| 882 Value *value; | |
| 883 switch (basic_type) { | |
| 884 case T_BYTE: | |
| 885 case T_CHAR: | |
| 886 case T_SHORT: | |
| 887 case T_INT: | |
| 888 value = svalue->jint_value(); | |
| 889 break; | |
| 890 | |
| 891 case T_LONG: | |
| 892 value = svalue->jlong_value(); | |
| 893 break; | |
| 894 | |
| 895 case T_FLOAT: | |
| 896 value = svalue->jfloat_value(); | |
| 897 break; | |
| 898 | |
| 899 case T_DOUBLE: | |
| 900 value = svalue->jdouble_value(); | |
| 901 break; | |
| 902 | |
| 903 case T_OBJECT: | |
| 904 value = svalue->jobject_value(); | |
| 905 // XXX assignability check | |
| 906 break; | |
| 907 | |
| 908 default: | |
| 909 tty->print_cr("Unhandled type %s", type2name(basic_type)); | |
| 910 ShouldNotReachHere(); | |
| 911 } | |
| 912 | |
| 913 const Type *array_type = SharkType::to_arrayType(basic_type); | |
| 914 if (value->getType() != array_type) | |
| 915 value = builder()->CreateIntCast(value, array_type, basic_type != T_CHAR); | |
| 916 | |
| 917 Value *addr = builder()->CreateArrayAddress( | |
| 918 array->jarray_value(), basic_type, index->jint_value(), "addr"); | |
| 919 | |
| 920 builder()->CreateStore(value, addr); | |
| 921 | |
| 922 if (basic_type == T_OBJECT) // XXX or T_ARRAY? | |
| 923 builder()->CreateUpdateBarrierSet(oopDesc::bs(), addr); | |
| 924 } | |
| 925 | |
| 926 void SharkTopLevelBlock::do_return(BasicType type) { | |
| 927 if (target()->intrinsic_id() == vmIntrinsics::_Object_init) | |
| 928 call_register_finalizer(local(0)->jobject_value()); | |
| 929 maybe_add_safepoint(); | |
| 930 handle_return(type, NULL); | |
| 931 } | |
| 932 | |
| 933 void SharkTopLevelBlock::do_athrow() { | |
| 934 SharkValue *exception = pop(); | |
| 935 check_null(exception); | |
| 936 handle_exception(exception->jobject_value(), EX_CHECK_FULL); | |
| 937 } | |
| 938 | |
| 939 void SharkTopLevelBlock::do_goto() { | |
| 940 do_branch(ciTypeFlow::GOTO_TARGET); | |
| 941 } | |
| 942 | |
| 943 void SharkTopLevelBlock::do_jsr() { | |
| 944 push(SharkValue::address_constant(iter()->next_bci())); | |
| 945 do_branch(ciTypeFlow::GOTO_TARGET); | |
| 946 } | |
| 947 | |
| 948 void SharkTopLevelBlock::do_ret() { | |
| 949 assert(local(iter()->get_index())->address_value() == | |
| 950 successor(ciTypeFlow::GOTO_TARGET)->start(), "should be"); | |
| 951 do_branch(ciTypeFlow::GOTO_TARGET); | |
| 952 } | |
| 953 | |
| 954 // All propagation of state from one block to the next (via | |
| 955 // dest->add_incoming) is handled by these methods: | |
| 956 // do_branch | |
| 957 // do_if_helper | |
| 958 // do_switch | |
| 959 // handle_exception | |
| 960 | |
| 961 void SharkTopLevelBlock::do_branch(int successor_index) { | |
| 962 SharkTopLevelBlock *dest = successor(successor_index); | |
| 963 builder()->CreateBr(dest->entry_block()); | |
| 964 dest->add_incoming(current_state()); | |
| 965 } | |
| 966 | |
| 967 void SharkTopLevelBlock::do_if(ICmpInst::Predicate p, | |
| 968 SharkValue* b, | |
| 969 SharkValue* a) { | |
| 970 Value *llvm_a, *llvm_b; | |
| 971 if (a->is_jobject()) { | |
| 972 llvm_a = a->intptr_value(builder()); | |
| 973 llvm_b = b->intptr_value(builder()); | |
| 974 } | |
| 975 else { | |
| 976 llvm_a = a->jint_value(); | |
| 977 llvm_b = b->jint_value(); | |
| 978 } | |
| 979 do_if_helper(p, llvm_b, llvm_a, current_state(), current_state()); | |
| 980 } | |
| 981 | |
| 982 void SharkTopLevelBlock::do_if_helper(ICmpInst::Predicate p, | |
| 983 Value* b, | |
| 984 Value* a, | |
| 985 SharkState* if_taken_state, | |
| 986 SharkState* not_taken_state) { | |
| 987 SharkTopLevelBlock *if_taken = successor(ciTypeFlow::IF_TAKEN); | |
| 988 SharkTopLevelBlock *not_taken = successor(ciTypeFlow::IF_NOT_TAKEN); | |
| 989 | |
| 990 builder()->CreateCondBr( | |
| 991 builder()->CreateICmp(p, a, b), | |
| 992 if_taken->entry_block(), not_taken->entry_block()); | |
| 993 | |
| 994 if_taken->add_incoming(if_taken_state); | |
| 995 not_taken->add_incoming(not_taken_state); | |
| 996 } | |
| 997 | |
| 998 void SharkTopLevelBlock::do_switch() { | |
| 999 int len = switch_table_length(); | |
| 1000 | |
| 1001 SharkTopLevelBlock *dest_block = successor(ciTypeFlow::SWITCH_DEFAULT); | |
| 1002 SwitchInst *switchinst = builder()->CreateSwitch( | |
| 1003 pop()->jint_value(), dest_block->entry_block(), len); | |
| 1004 dest_block->add_incoming(current_state()); | |
| 1005 | |
| 1006 for (int i = 0; i < len; i++) { | |
| 1007 int dest_bci = switch_dest(i); | |
| 1008 if (dest_bci != switch_default_dest()) { | |
| 1009 dest_block = bci_successor(dest_bci); | |
| 1010 switchinst->addCase( | |
| 1011 LLVMValue::jint_constant(switch_key(i)), | |
| 1012 dest_block->entry_block()); | |
| 1013 dest_block->add_incoming(current_state()); | |
| 1014 } | |
| 1015 } | |
| 1016 } | |
| 1017 | |
| 1018 ciMethod* SharkTopLevelBlock::improve_virtual_call(ciMethod* caller, | |
| 1019 ciInstanceKlass* klass, | |
| 1020 ciMethod* dest_method, | |
| 1021 ciType* receiver_type) { | |
| 1022 // If the method is obviously final then we are already done | |
| 1023 if (dest_method->can_be_statically_bound()) | |
| 1024 return dest_method; | |
| 1025 | |
| 1026 // Array methods are all inherited from Object and are monomorphic | |
| 1027 if (receiver_type->is_array_klass() && | |
| 1028 dest_method->holder() == java_lang_Object_klass()) | |
| 1029 return dest_method; | |
| 1030 | |
| 1031 #ifdef SHARK_CAN_DEOPTIMIZE_ANYWHERE | |
| 1032 // This code can replace a virtual call with a direct call if this | |
| 1033 // class is the only one in the entire set of loaded classes that | |
| 1034 // implements this method. This makes the compiled code dependent | |
| 1035 // on other classes that implement the method not being loaded, a | |
| 1036 // condition which is enforced by the dependency tracker. If the | |
| 1037 // dependency tracker determines a method has become invalid it | |
| 1038 // will mark it for recompilation, causing running copies to be | |
| 1039 // deoptimized. Shark currently can't deoptimize arbitrarily like | |
| 1040 // that, so this optimization cannot be used. | |
| 1041 // http://icedtea.classpath.org/bugzilla/show_bug.cgi?id=481 | |
| 1042 | |
| 1043 // All other interesting cases are instance classes | |
| 1044 if (!receiver_type->is_instance_klass()) | |
| 1045 return NULL; | |
| 1046 | |
| 1047 // Attempt to improve the receiver | |
| 1048 ciInstanceKlass* actual_receiver = klass; | |
| 1049 ciInstanceKlass *improved_receiver = receiver_type->as_instance_klass(); | |
| 1050 if (improved_receiver->is_loaded() && | |
| 1051 improved_receiver->is_initialized() && | |
| 1052 !improved_receiver->is_interface() && | |
| 1053 improved_receiver->is_subtype_of(actual_receiver)) { | |
| 1054 actual_receiver = improved_receiver; | |
| 1055 } | |
| 1056 | |
| 1057 // Attempt to find a monomorphic target for this call using | |
| 1058 // class heirachy analysis. | |
| 1059 ciInstanceKlass *calling_klass = caller->holder(); | |
| 1060 ciMethod* monomorphic_target = | |
| 1061 dest_method->find_monomorphic_target(calling_klass, klass, actual_receiver); | |
| 1062 if (monomorphic_target != NULL) { | |
| 1063 assert(!monomorphic_target->is_abstract(), "shouldn't be"); | |
| 1064 | |
| 1065 // Opto has a bunch of type checking here that I don't | |
| 1066 // understand. It's to inhibit casting in one direction, | |
| 1067 // possibly because objects in Opto can have inexact | |
| 1068 // types, but I can't even tell which direction it | |
| 1069 // doesn't like. For now I'm going to block *any* cast. | |
| 1070 if (monomorphic_target != dest_method) { | |
| 1071 if (SharkPerformanceWarnings) { | |
| 1072 warning("found monomorphic target, but inhibited cast:"); | |
| 1073 tty->print(" dest_method = "); | |
| 1074 dest_method->print_short_name(tty); | |
| 1075 tty->cr(); | |
| 1076 tty->print(" monomorphic_target = "); | |
| 1077 monomorphic_target->print_short_name(tty); | |
| 1078 tty->cr(); | |
| 1079 } | |
| 1080 monomorphic_target = NULL; | |
| 1081 } | |
| 1082 } | |
| 1083 | |
| 1084 // Replace the virtual call with a direct one. This makes | |
| 1085 // us dependent on that target method not getting overridden | |
| 1086 // by dynamic class loading. | |
| 1087 if (monomorphic_target != NULL) { | |
| 1088 dependencies()->assert_unique_concrete_method( | |
| 1089 actual_receiver, monomorphic_target); | |
| 1090 return monomorphic_target; | |
| 1091 } | |
| 1092 | |
| 1093 // Because Opto distinguishes exact types from inexact ones | |
| 1094 // it can perform a further optimization to replace calls | |
| 1095 // with non-monomorphic targets if the receiver has an exact | |
| 1096 // type. We don't mark types this way, so we can't do this. | |
| 1097 | |
| 1098 #endif // SHARK_CAN_DEOPTIMIZE_ANYWHERE | |
| 1099 | |
| 1100 return NULL; | |
| 1101 } | |
| 1102 | |
| 1103 Value *SharkTopLevelBlock::get_direct_callee(ciMethod* method) { | |
| 1104 return builder()->CreateBitCast( | |
| 1105 builder()->CreateInlineOop(method), | |
| 1106 SharkType::methodOop_type(), | |
| 1107 "callee"); | |
| 1108 } | |
| 1109 | |
| 1110 Value *SharkTopLevelBlock::get_virtual_callee(SharkValue* receiver, | |
| 1111 int vtable_index) { | |
| 1112 Value *klass = builder()->CreateValueOfStructEntry( | |
| 1113 receiver->jobject_value(), | |
| 1114 in_ByteSize(oopDesc::klass_offset_in_bytes()), | |
| 1115 SharkType::oop_type(), | |
| 1116 "klass"); | |
| 1117 | |
| 1118 return builder()->CreateLoad( | |
| 1119 builder()->CreateArrayAddress( | |
| 1120 klass, | |
| 1121 SharkType::methodOop_type(), | |
| 1122 vtableEntry::size() * wordSize, | |
| 1123 in_ByteSize(instanceKlass::vtable_start_offset() * wordSize), | |
| 1124 LLVMValue::intptr_constant(vtable_index)), | |
| 1125 "callee"); | |
| 1126 } | |
| 1127 | |
| 1128 Value* SharkTopLevelBlock::get_interface_callee(SharkValue *receiver, | |
| 1129 ciMethod* method) { | |
| 1130 BasicBlock *loop = function()->CreateBlock("loop"); | |
| 1131 BasicBlock *got_null = function()->CreateBlock("got_null"); | |
| 1132 BasicBlock *not_null = function()->CreateBlock("not_null"); | |
| 1133 BasicBlock *next = function()->CreateBlock("next"); | |
| 1134 BasicBlock *got_entry = function()->CreateBlock("got_entry"); | |
| 1135 | |
| 1136 // Locate the receiver's itable | |
| 1137 Value *object_klass = builder()->CreateValueOfStructEntry( | |
| 1138 receiver->jobject_value(), in_ByteSize(oopDesc::klass_offset_in_bytes()), | |
| 1139 SharkType::oop_type(), | |
| 1140 "object_klass"); | |
| 1141 | |
| 1142 Value *vtable_start = builder()->CreateAdd( | |
| 1143 builder()->CreatePtrToInt(object_klass, SharkType::intptr_type()), | |
| 1144 LLVMValue::intptr_constant( | |
| 1145 instanceKlass::vtable_start_offset() * HeapWordSize), | |
| 1146 "vtable_start"); | |
| 1147 | |
| 1148 Value *vtable_length = builder()->CreateValueOfStructEntry( | |
| 1149 object_klass, | |
| 1150 in_ByteSize(instanceKlass::vtable_length_offset() * HeapWordSize), | |
| 1151 SharkType::jint_type(), | |
| 1152 "vtable_length"); | |
| 1153 vtable_length = | |
| 1154 builder()->CreateIntCast(vtable_length, SharkType::intptr_type(), false); | |
| 1155 | |
| 1156 bool needs_aligning = HeapWordsPerLong > 1; | |
| 1157 Value *itable_start = builder()->CreateAdd( | |
| 1158 vtable_start, | |
| 1159 builder()->CreateShl( | |
| 1160 vtable_length, | |
| 1161 LLVMValue::intptr_constant(exact_log2(vtableEntry::size() * wordSize))), | |
| 1162 needs_aligning ? "" : "itable_start"); | |
| 1163 if (needs_aligning) { | |
| 1164 itable_start = builder()->CreateAnd( | |
| 1165 builder()->CreateAdd( | |
| 1166 itable_start, LLVMValue::intptr_constant(BytesPerLong - 1)), | |
| 1167 LLVMValue::intptr_constant(~(BytesPerLong - 1)), | |
| 1168 "itable_start"); | |
| 1169 } | |
| 1170 | |
| 1171 // Locate this interface's entry in the table | |
| 1172 Value *iklass = builder()->CreateInlineOop(method->holder()); | |
| 1173 BasicBlock *loop_entry = builder()->GetInsertBlock(); | |
| 1174 builder()->CreateBr(loop); | |
| 1175 builder()->SetInsertPoint(loop); | |
| 1176 PHINode *itable_entry_addr = builder()->CreatePHI( | |
| 1177 SharkType::intptr_type(), "itable_entry_addr"); | |
| 1178 itable_entry_addr->addIncoming(itable_start, loop_entry); | |
| 1179 | |
| 1180 Value *itable_entry = builder()->CreateIntToPtr( | |
| 1181 itable_entry_addr, SharkType::itableOffsetEntry_type(), "itable_entry"); | |
| 1182 | |
| 1183 Value *itable_iklass = builder()->CreateValueOfStructEntry( | |
| 1184 itable_entry, | |
| 1185 in_ByteSize(itableOffsetEntry::interface_offset_in_bytes()), | |
| 1186 SharkType::oop_type(), | |
| 1187 "itable_iklass"); | |
| 1188 | |
| 1189 builder()->CreateCondBr( | |
| 1190 builder()->CreateICmpEQ(itable_iklass, LLVMValue::null()), | |
| 1191 got_null, not_null); | |
| 1192 | |
| 1193 // A null entry means that the class doesn't implement the | |
| 1194 // interface, and wasn't the same as the class checked when | |
| 1195 // the interface was resolved. | |
| 1196 builder()->SetInsertPoint(got_null); | |
| 1197 builder()->CreateUnimplemented(__FILE__, __LINE__); | |
| 1198 builder()->CreateUnreachable(); | |
| 1199 | |
| 1200 builder()->SetInsertPoint(not_null); | |
| 1201 builder()->CreateCondBr( | |
| 1202 builder()->CreateICmpEQ(itable_iklass, iklass), | |
| 1203 got_entry, next); | |
| 1204 | |
| 1205 builder()->SetInsertPoint(next); | |
| 1206 Value *next_entry = builder()->CreateAdd( | |
| 1207 itable_entry_addr, | |
| 1208 LLVMValue::intptr_constant(itableOffsetEntry::size() * wordSize)); | |
| 1209 builder()->CreateBr(loop); | |
| 1210 itable_entry_addr->addIncoming(next_entry, next); | |
| 1211 | |
| 1212 // Locate the method pointer | |
| 1213 builder()->SetInsertPoint(got_entry); | |
| 1214 Value *offset = builder()->CreateValueOfStructEntry( | |
| 1215 itable_entry, | |
| 1216 in_ByteSize(itableOffsetEntry::offset_offset_in_bytes()), | |
| 1217 SharkType::jint_type(), | |
| 1218 "offset"); | |
| 1219 offset = | |
| 1220 builder()->CreateIntCast(offset, SharkType::intptr_type(), false); | |
| 1221 | |
| 1222 return builder()->CreateLoad( | |
| 1223 builder()->CreateIntToPtr( | |
| 1224 builder()->CreateAdd( | |
| 1225 builder()->CreateAdd( | |
| 1226 builder()->CreateAdd( | |
| 1227 builder()->CreatePtrToInt( | |
| 1228 object_klass, SharkType::intptr_type()), | |
| 1229 offset), | |
| 1230 LLVMValue::intptr_constant( | |
| 1231 method->itable_index() * itableMethodEntry::size() * wordSize)), | |
| 1232 LLVMValue::intptr_constant( | |
| 1233 itableMethodEntry::method_offset_in_bytes())), | |
| 1234 PointerType::getUnqual(SharkType::methodOop_type())), | |
| 1235 "callee"); | |
| 1236 } | |
| 1237 | |
| 1238 void SharkTopLevelBlock::do_call() { | |
| 1239 // Set frequently used booleans | |
| 1240 bool is_static = bc() == Bytecodes::_invokestatic; | |
| 1241 bool is_virtual = bc() == Bytecodes::_invokevirtual; | |
| 1242 bool is_interface = bc() == Bytecodes::_invokeinterface; | |
| 1243 | |
| 1244 // Find the method being called | |
| 1245 bool will_link; | |
| 1246 ciMethod *dest_method = iter()->get_method(will_link); | |
| 1247 assert(will_link, "typeflow responsibility"); | |
| 1248 assert(dest_method->is_static() == is_static, "must match bc"); | |
| 1249 | |
| 1250 // Find the class of the method being called. Note | |
| 1251 // that the superclass check in the second assertion | |
| 1252 // is to cope with a hole in the spec that allows for | |
| 1253 // invokeinterface instructions where the resolved | |
| 1254 // method is a virtual method in java.lang.Object. | |
| 1255 // javac doesn't generate code like that, but there's | |
| 1256 // no reason a compliant Java compiler might not. | |
| 1257 ciInstanceKlass *holder_klass = dest_method->holder(); | |
| 1258 assert(holder_klass->is_loaded(), "scan_for_traps responsibility"); | |
| 1259 assert(holder_klass->is_interface() || | |
| 1260 holder_klass->super() == NULL || | |
| 1261 !is_interface, "must match bc"); | |
| 1262 ciKlass *holder = iter()->get_declared_method_holder(); | |
| 1263 ciInstanceKlass *klass = | |
| 1264 ciEnv::get_instance_klass_for_declared_method_holder(holder); | |
| 1265 | |
| 1266 // Find the receiver in the stack. We do this before | |
| 1267 // trying to inline because the inliner can only use | |
| 1268 // zero-checked values, not being able to perform the | |
| 1269 // check itself. | |
| 1270 SharkValue *receiver = NULL; | |
| 1271 if (!is_static) { | |
| 1272 receiver = xstack(dest_method->arg_size() - 1); | |
| 1273 check_null(receiver); | |
| 1274 } | |
| 1275 | |
| 1276 // Try to improve non-direct calls | |
| 1277 bool call_is_virtual = is_virtual || is_interface; | |
| 1278 ciMethod *call_method = dest_method; | |
| 1279 if (call_is_virtual) { | |
| 1280 ciMethod *optimized_method = improve_virtual_call( | |
| 1281 target(), klass, dest_method, receiver->type()); | |
| 1282 if (optimized_method) { | |
| 1283 call_method = optimized_method; | |
| 1284 call_is_virtual = false; | |
| 1285 } | |
| 1286 } | |
| 1287 | |
| 1288 // Try to inline the call | |
| 1289 if (!call_is_virtual) { | |
| 1290 if (SharkInliner::attempt_inline(call_method, current_state())) | |
| 1291 return; | |
| 1292 } | |
| 1293 | |
| 1294 // Find the method we are calling | |
| 1295 Value *callee; | |
| 1296 if (call_is_virtual) { | |
| 1297 if (is_virtual) { | |
| 1298 assert(klass->is_linked(), "scan_for_traps responsibility"); | |
| 1299 int vtable_index = call_method->resolve_vtable_index( | |
| 1300 target()->holder(), klass); | |
| 1301 assert(vtable_index >= 0, "should be"); | |
| 1302 callee = get_virtual_callee(receiver, vtable_index); | |
| 1303 } | |
| 1304 else { | |
| 1305 assert(is_interface, "should be"); | |
| 1306 callee = get_interface_callee(receiver, call_method); | |
| 1307 } | |
| 1308 } | |
| 1309 else { | |
| 1310 callee = get_direct_callee(call_method); | |
| 1311 } | |
| 1312 | |
| 1313 // Load the SharkEntry from the callee | |
| 1314 Value *base_pc = builder()->CreateValueOfStructEntry( | |
| 1315 callee, methodOopDesc::from_interpreted_offset(), | |
| 1316 SharkType::intptr_type(), | |
| 1317 "base_pc"); | |
| 1318 | |
| 1319 // Load the entry point from the SharkEntry | |
| 1320 Value *entry_point = builder()->CreateLoad( | |
| 1321 builder()->CreateIntToPtr( | |
| 1322 builder()->CreateAdd( | |
| 1323 base_pc, | |
| 1324 LLVMValue::intptr_constant(in_bytes(ZeroEntry::entry_point_offset()))), | |
| 1325 PointerType::getUnqual( | |
| 1326 PointerType::getUnqual(SharkType::entry_point_type()))), | |
| 1327 "entry_point"); | |
| 1328 | |
| 1329 // Make the call | |
| 1330 decache_for_Java_call(call_method); | |
| 1331 Value *deoptimized_frames = builder()->CreateCall3( | |
| 1332 entry_point, callee, base_pc, thread()); | |
| 1333 | |
| 1334 // If the callee got deoptimized then reexecute in the interpreter | |
| 1335 BasicBlock *reexecute = function()->CreateBlock("reexecute"); | |
| 1336 BasicBlock *call_completed = function()->CreateBlock("call_completed"); | |
| 1337 builder()->CreateCondBr( | |
| 1338 builder()->CreateICmpNE(deoptimized_frames, LLVMValue::jint_constant(0)), | |
| 1339 reexecute, call_completed); | |
| 1340 | |
| 1341 builder()->SetInsertPoint(reexecute); | |
| 1342 builder()->CreateCall2( | |
| 1343 builder()->deoptimized_entry_point(), | |
| 1344 builder()->CreateSub(deoptimized_frames, LLVMValue::jint_constant(1)), | |
| 1345 thread()); | |
| 1346 builder()->CreateBr(call_completed); | |
| 1347 | |
| 1348 // Cache after the call | |
| 1349 builder()->SetInsertPoint(call_completed); | |
| 1350 cache_after_Java_call(call_method); | |
| 1351 | |
| 1352 // Check for pending exceptions | |
| 1353 check_pending_exception(EX_CHECK_FULL); | |
| 1354 | |
| 1355 // Mark that a safepoint check has occurred | |
| 1356 current_state()->set_has_safepointed(true); | |
| 1357 } | |
| 1358 | |
| 1359 bool SharkTopLevelBlock::static_subtype_check(ciKlass* check_klass, | |
| 1360 ciKlass* object_klass) { | |
| 1361 // If the class we're checking against is java.lang.Object | |
| 1362 // then this is a no brainer. Apparently this can happen | |
| 1363 // in reflective code... | |
| 1364 if (check_klass == java_lang_Object_klass()) | |
| 1365 return true; | |
| 1366 | |
| 1367 // Perform a subtype check. NB in opto's code for this | |
| 1368 // (GraphKit::static_subtype_check) it says that static | |
| 1369 // interface types cannot be trusted, and if opto can't | |
| 1370 // trust them then I assume we can't either. | |
| 1371 if (object_klass->is_loaded() && !object_klass->is_interface()) { | |
| 1372 if (object_klass == check_klass) | |
| 1373 return true; | |
| 1374 | |
| 1375 if (check_klass->is_loaded() && object_klass->is_subtype_of(check_klass)) | |
| 1376 return true; | |
| 1377 } | |
| 1378 | |
| 1379 return false; | |
| 1380 } | |
| 1381 | |
| 1382 void SharkTopLevelBlock::do_instance_check() { | |
| 1383 // Get the class we're checking against | |
| 1384 bool will_link; | |
| 1385 ciKlass *check_klass = iter()->get_klass(will_link); | |
| 1386 | |
| 1387 // Get the class of the object we're checking | |
| 1388 ciKlass *object_klass = xstack(0)->type()->as_klass(); | |
| 1389 | |
| 1390 // Can we optimize this check away? | |
| 1391 if (static_subtype_check(check_klass, object_klass)) { | |
| 1392 if (bc() == Bytecodes::_instanceof) { | |
| 1393 pop(); | |
| 1394 push(SharkValue::jint_constant(1)); | |
| 1395 } | |
| 1396 return; | |
| 1397 } | |
| 1398 | |
| 1399 // Need to check this one at runtime | |
| 1400 if (will_link) | |
| 1401 do_full_instance_check(check_klass); | |
| 1402 else | |
| 1403 do_trapping_instance_check(check_klass); | |
| 1404 } | |
| 1405 | |
| 1406 bool SharkTopLevelBlock::maybe_do_instanceof_if() { | |
| 1407 // Get the class we're checking against | |
| 1408 bool will_link; | |
| 1409 ciKlass *check_klass = iter()->get_klass(will_link); | |
| 1410 | |
| 1411 // If the class is unloaded then the instanceof | |
| 1412 // cannot possibly succeed. | |
| 1413 if (!will_link) | |
| 1414 return false; | |
| 1415 | |
| 1416 // Keep a copy of the object we're checking | |
| 1417 SharkValue *old_object = xstack(0); | |
| 1418 | |
| 1419 // Get the class of the object we're checking | |
| 1420 ciKlass *object_klass = old_object->type()->as_klass(); | |
| 1421 | |
| 1422 // If the instanceof can be optimized away at compile time | |
| 1423 // then any subsequent checkcasts will be too so we handle | |
| 1424 // it normally. | |
| 1425 if (static_subtype_check(check_klass, object_klass)) | |
| 1426 return false; | |
| 1427 | |
| 1428 // Perform the instance check | |
| 1429 do_full_instance_check(check_klass); | |
| 1430 Value *result = pop()->jint_value(); | |
| 1431 | |
| 1432 // Create the casted object | |
| 1433 SharkValue *new_object = SharkValue::create_generic( | |
| 1434 check_klass, old_object->jobject_value(), old_object->zero_checked()); | |
| 1435 | |
| 1436 // Create two copies of the current state, one with the | |
| 1437 // original object and one with all instances of the | |
| 1438 // original object replaced with the new, casted object. | |
| 1439 SharkState *new_state = current_state(); | |
| 1440 SharkState *old_state = new_state->copy(); | |
| 1441 new_state->replace_all(old_object, new_object); | |
| 1442 | |
| 1443 // Perform the check-and-branch | |
| 1444 switch (iter()->next_bc()) { | |
| 1445 case Bytecodes::_ifeq: | |
| 1446 // branch if not an instance | |
| 1447 do_if_helper( | |
| 1448 ICmpInst::ICMP_EQ, | |
| 1449 LLVMValue::jint_constant(0), result, | |
| 1450 old_state, new_state); | |
| 1451 break; | |
| 1452 | |
| 1453 case Bytecodes::_ifne: | |
| 1454 // branch if an instance | |
| 1455 do_if_helper( | |
| 1456 ICmpInst::ICMP_NE, | |
| 1457 LLVMValue::jint_constant(0), result, | |
| 1458 new_state, old_state); | |
| 1459 break; | |
| 1460 | |
| 1461 default: | |
| 1462 ShouldNotReachHere(); | |
| 1463 } | |
| 1464 | |
| 1465 return true; | |
| 1466 } | |
| 1467 | |
| 1468 void SharkTopLevelBlock::do_full_instance_check(ciKlass* klass) { | |
| 1469 BasicBlock *not_null = function()->CreateBlock("not_null"); | |
| 1470 BasicBlock *subtype_check = function()->CreateBlock("subtype_check"); | |
| 1471 BasicBlock *is_instance = function()->CreateBlock("is_instance"); | |
| 1472 BasicBlock *not_instance = function()->CreateBlock("not_instance"); | |
| 1473 BasicBlock *merge1 = function()->CreateBlock("merge1"); | |
| 1474 BasicBlock *merge2 = function()->CreateBlock("merge2"); | |
| 1475 | |
| 1476 enum InstanceCheckStates { | |
| 1477 IC_IS_NULL, | |
| 1478 IC_IS_INSTANCE, | |
| 1479 IC_NOT_INSTANCE, | |
| 1480 }; | |
| 1481 | |
| 1482 // Pop the object off the stack | |
| 1483 Value *object = pop()->jobject_value(); | |
| 1484 | |
| 1485 // Null objects aren't instances of anything | |
| 1486 builder()->CreateCondBr( | |
| 1487 builder()->CreateICmpEQ(object, LLVMValue::null()), | |
| 1488 merge2, not_null); | |
| 1489 BasicBlock *null_block = builder()->GetInsertBlock(); | |
| 1490 | |
| 1491 // Get the class we're checking against | |
| 1492 builder()->SetInsertPoint(not_null); | |
| 1493 Value *check_klass = builder()->CreateInlineOop(klass); | |
| 1494 | |
| 1495 // Get the class of the object being tested | |
| 1496 Value *object_klass = builder()->CreateValueOfStructEntry( | |
| 1497 object, in_ByteSize(oopDesc::klass_offset_in_bytes()), | |
| 1498 SharkType::oop_type(), | |
| 1499 "object_klass"); | |
| 1500 | |
| 1501 // Perform the check | |
| 1502 builder()->CreateCondBr( | |
| 1503 builder()->CreateICmpEQ(check_klass, object_klass), | |
| 1504 is_instance, subtype_check); | |
| 1505 | |
| 1506 builder()->SetInsertPoint(subtype_check); | |
| 1507 builder()->CreateCondBr( | |
| 1508 builder()->CreateICmpNE( | |
| 1509 builder()->CreateCall2( | |
| 1510 builder()->is_subtype_of(), check_klass, object_klass), | |
| 1511 LLVMValue::jbyte_constant(0)), | |
| 1512 is_instance, not_instance); | |
| 1513 | |
| 1514 builder()->SetInsertPoint(is_instance); | |
| 1515 builder()->CreateBr(merge1); | |
| 1516 | |
| 1517 builder()->SetInsertPoint(not_instance); | |
| 1518 builder()->CreateBr(merge1); | |
| 1519 | |
| 1520 // First merge | |
| 1521 builder()->SetInsertPoint(merge1); | |
| 1522 PHINode *nonnull_result = builder()->CreatePHI( | |
| 1523 SharkType::jint_type(), "nonnull_result"); | |
| 1524 nonnull_result->addIncoming( | |
| 1525 LLVMValue::jint_constant(IC_IS_INSTANCE), is_instance); | |
| 1526 nonnull_result->addIncoming( | |
| 1527 LLVMValue::jint_constant(IC_NOT_INSTANCE), not_instance); | |
| 1528 BasicBlock *nonnull_block = builder()->GetInsertBlock(); | |
| 1529 builder()->CreateBr(merge2); | |
| 1530 | |
| 1531 // Second merge | |
| 1532 builder()->SetInsertPoint(merge2); | |
| 1533 PHINode *result = builder()->CreatePHI( | |
| 1534 SharkType::jint_type(), "result"); | |
| 1535 result->addIncoming(LLVMValue::jint_constant(IC_IS_NULL), null_block); | |
| 1536 result->addIncoming(nonnull_result, nonnull_block); | |
| 1537 | |
| 1538 // Handle the result | |
| 1539 if (bc() == Bytecodes::_checkcast) { | |
| 1540 BasicBlock *failure = function()->CreateBlock("failure"); | |
| 1541 BasicBlock *success = function()->CreateBlock("success"); | |
| 1542 | |
| 1543 builder()->CreateCondBr( | |
| 1544 builder()->CreateICmpNE( | |
| 1545 result, LLVMValue::jint_constant(IC_NOT_INSTANCE)), | |
| 1546 success, failure); | |
| 1547 | |
| 1548 builder()->SetInsertPoint(failure); | |
| 1549 SharkState *saved_state = current_state()->copy(); | |
| 1550 | |
| 1551 call_vm( | |
| 1552 builder()->throw_ClassCastException(), | |
| 1553 builder()->CreateIntToPtr( | |
| 1554 LLVMValue::intptr_constant((intptr_t) __FILE__), | |
| 1555 PointerType::getUnqual(SharkType::jbyte_type())), | |
| 1556 LLVMValue::jint_constant(__LINE__), | |
| 1557 EX_CHECK_NONE); | |
| 1558 | |
| 1559 Value *pending_exception = get_pending_exception(); | |
| 1560 clear_pending_exception(); | |
| 1561 handle_exception(pending_exception, EX_CHECK_FULL); | |
| 1562 | |
| 1563 set_current_state(saved_state); | |
| 1564 builder()->SetInsertPoint(success); | |
| 1565 push(SharkValue::create_generic(klass, object, false)); | |
| 1566 } | |
| 1567 else { | |
| 1568 push( | |
| 1569 SharkValue::create_jint( | |
| 1570 builder()->CreateIntCast( | |
| 1571 builder()->CreateICmpEQ( | |
| 1572 result, LLVMValue::jint_constant(IC_IS_INSTANCE)), | |
| 1573 SharkType::jint_type(), false), false)); | |
| 1574 } | |
| 1575 } | |
| 1576 | |
| 1577 void SharkTopLevelBlock::do_trapping_instance_check(ciKlass* klass) { | |
| 1578 BasicBlock *not_null = function()->CreateBlock("not_null"); | |
| 1579 BasicBlock *is_null = function()->CreateBlock("null"); | |
| 1580 | |
| 1581 // Leave the object on the stack so it's there if we trap | |
| 1582 builder()->CreateCondBr( | |
| 1583 builder()->CreateICmpEQ(xstack(0)->jobject_value(), LLVMValue::null()), | |
| 1584 is_null, not_null); | |
| 1585 SharkState *saved_state = current_state()->copy(); | |
| 1586 | |
| 1587 // If it's not null then we need to trap | |
| 1588 builder()->SetInsertPoint(not_null); | |
| 1589 set_current_state(saved_state->copy()); | |
| 1590 do_trap( | |
| 1591 Deoptimization::make_trap_request( | |
| 1592 Deoptimization::Reason_uninitialized, | |
| 1593 Deoptimization::Action_reinterpret)); | |
| 1594 | |
| 1595 // If it's null then we're ok | |
| 1596 builder()->SetInsertPoint(is_null); | |
| 1597 set_current_state(saved_state); | |
| 1598 if (bc() == Bytecodes::_checkcast) { | |
| 1599 push(SharkValue::create_generic(klass, pop()->jobject_value(), false)); | |
| 1600 } | |
| 1601 else { | |
| 1602 pop(); | |
| 1603 push(SharkValue::jint_constant(0)); | |
| 1604 } | |
| 1605 } | |
| 1606 | |
| 1607 void SharkTopLevelBlock::do_new() { | |
| 1608 bool will_link; | |
| 1609 ciInstanceKlass* klass = iter()->get_klass(will_link)->as_instance_klass(); | |
| 1610 assert(will_link, "typeflow responsibility"); | |
| 1611 | |
| 1612 BasicBlock *got_tlab = NULL; | |
| 1613 BasicBlock *heap_alloc = NULL; | |
| 1614 BasicBlock *retry = NULL; | |
| 1615 BasicBlock *got_heap = NULL; | |
| 1616 BasicBlock *initialize = NULL; | |
| 1617 BasicBlock *got_fast = NULL; | |
| 1618 BasicBlock *slow_alloc_and_init = NULL; | |
| 1619 BasicBlock *got_slow = NULL; | |
| 1620 BasicBlock *push_object = NULL; | |
| 1621 | |
| 1622 SharkState *fast_state = NULL; | |
| 1623 | |
| 1624 Value *tlab_object = NULL; | |
| 1625 Value *heap_object = NULL; | |
| 1626 Value *fast_object = NULL; | |
| 1627 Value *slow_object = NULL; | |
| 1628 Value *object = NULL; | |
| 1629 | |
| 1630 // The fast path | |
| 1631 if (!Klass::layout_helper_needs_slow_path(klass->layout_helper())) { | |
| 1632 if (UseTLAB) { | |
| 1633 got_tlab = function()->CreateBlock("got_tlab"); | |
| 1634 heap_alloc = function()->CreateBlock("heap_alloc"); | |
| 1635 } | |
| 1636 retry = function()->CreateBlock("retry"); | |
| 1637 got_heap = function()->CreateBlock("got_heap"); | |
| 1638 initialize = function()->CreateBlock("initialize"); | |
| 1639 slow_alloc_and_init = function()->CreateBlock("slow_alloc_and_init"); | |
| 1640 push_object = function()->CreateBlock("push_object"); | |
| 1641 | |
| 1642 size_t size_in_bytes = klass->size_helper() << LogHeapWordSize; | |
| 1643 | |
| 1644 // Thread local allocation | |
| 1645 if (UseTLAB) { | |
| 1646 Value *top_addr = builder()->CreateAddressOfStructEntry( | |
| 1647 thread(), Thread::tlab_top_offset(), | |
| 1648 PointerType::getUnqual(SharkType::intptr_type()), | |
| 1649 "top_addr"); | |
| 1650 | |
| 1651 Value *end = builder()->CreateValueOfStructEntry( | |
| 1652 thread(), Thread::tlab_end_offset(), | |
| 1653 SharkType::intptr_type(), | |
| 1654 "end"); | |
| 1655 | |
| 1656 Value *old_top = builder()->CreateLoad(top_addr, "old_top"); | |
| 1657 Value *new_top = builder()->CreateAdd( | |
| 1658 old_top, LLVMValue::intptr_constant(size_in_bytes)); | |
| 1659 | |
| 1660 builder()->CreateCondBr( | |
| 1661 builder()->CreateICmpULE(new_top, end), | |
| 1662 got_tlab, heap_alloc); | |
| 1663 | |
| 1664 builder()->SetInsertPoint(got_tlab); | |
| 1665 tlab_object = builder()->CreateIntToPtr( | |
| 1666 old_top, SharkType::oop_type(), "tlab_object"); | |
| 1667 | |
| 1668 builder()->CreateStore(new_top, top_addr); | |
| 1669 builder()->CreateBr(initialize); | |
| 1670 | |
| 1671 builder()->SetInsertPoint(heap_alloc); | |
| 1672 } | |
| 1673 | |
| 1674 // Heap allocation | |
| 1675 Value *top_addr = builder()->CreateIntToPtr( | |
| 1676 LLVMValue::intptr_constant((intptr_t) Universe::heap()->top_addr()), | |
| 1677 PointerType::getUnqual(SharkType::intptr_type()), | |
| 1678 "top_addr"); | |
| 1679 | |
| 1680 Value *end = builder()->CreateLoad( | |
| 1681 builder()->CreateIntToPtr( | |
| 1682 LLVMValue::intptr_constant((intptr_t) Universe::heap()->end_addr()), | |
| 1683 PointerType::getUnqual(SharkType::intptr_type())), | |
| 1684 "end"); | |
| 1685 | |
| 1686 builder()->CreateBr(retry); | |
| 1687 builder()->SetInsertPoint(retry); | |
| 1688 | |
| 1689 Value *old_top = builder()->CreateLoad(top_addr, "top"); | |
| 1690 Value *new_top = builder()->CreateAdd( | |
| 1691 old_top, LLVMValue::intptr_constant(size_in_bytes)); | |
| 1692 | |
| 1693 builder()->CreateCondBr( | |
| 1694 builder()->CreateICmpULE(new_top, end), | |
| 1695 got_heap, slow_alloc_and_init); | |
| 1696 | |
| 1697 builder()->SetInsertPoint(got_heap); | |
| 1698 heap_object = builder()->CreateIntToPtr( | |
| 1699 old_top, SharkType::oop_type(), "heap_object"); | |
| 1700 | |
| 1701 Value *check = builder()->CreateCmpxchgPtr(new_top, top_addr, old_top); | |
| 1702 builder()->CreateCondBr( | |
| 1703 builder()->CreateICmpEQ(old_top, check), | |
| 1704 initialize, retry); | |
| 1705 | |
| 1706 // Initialize the object | |
| 1707 builder()->SetInsertPoint(initialize); | |
| 1708 if (tlab_object) { | |
| 1709 PHINode *phi = builder()->CreatePHI( | |
| 1710 SharkType::oop_type(), "fast_object"); | |
| 1711 phi->addIncoming(tlab_object, got_tlab); | |
| 1712 phi->addIncoming(heap_object, got_heap); | |
| 1713 fast_object = phi; | |
| 1714 } | |
| 1715 else { | |
| 1716 fast_object = heap_object; | |
| 1717 } | |
| 1718 | |
| 1719 builder()->CreateMemset( | |
| 1720 builder()->CreateBitCast( | |
| 1721 fast_object, PointerType::getUnqual(SharkType::jbyte_type())), | |
| 1722 LLVMValue::jbyte_constant(0), | |
| 1723 LLVMValue::jint_constant(size_in_bytes), | |
| 1724 LLVMValue::jint_constant(HeapWordSize)); | |
| 1725 | |
| 1726 Value *mark_addr = builder()->CreateAddressOfStructEntry( | |
| 1727 fast_object, in_ByteSize(oopDesc::mark_offset_in_bytes()), | |
| 1728 PointerType::getUnqual(SharkType::intptr_type()), | |
| 1729 "mark_addr"); | |
| 1730 | |
| 1731 Value *klass_addr = builder()->CreateAddressOfStructEntry( | |
| 1732 fast_object, in_ByteSize(oopDesc::klass_offset_in_bytes()), | |
| 1733 PointerType::getUnqual(SharkType::oop_type()), | |
| 1734 "klass_addr"); | |
| 1735 | |
| 1736 // Set the mark | |
| 1737 intptr_t mark; | |
| 1738 if (UseBiasedLocking) { | |
| 1739 Unimplemented(); | |
| 1740 } | |
| 1741 else { | |
| 1742 mark = (intptr_t) markOopDesc::prototype(); | |
| 1743 } | |
| 1744 builder()->CreateStore(LLVMValue::intptr_constant(mark), mark_addr); | |
| 1745 | |
| 1746 // Set the class | |
| 1747 Value *rtklass = builder()->CreateInlineOop(klass); | |
| 1748 builder()->CreateStore(rtklass, klass_addr); | |
| 1749 got_fast = builder()->GetInsertBlock(); | |
| 1750 | |
| 1751 builder()->CreateBr(push_object); | |
| 1752 builder()->SetInsertPoint(slow_alloc_and_init); | |
| 1753 fast_state = current_state()->copy(); | |
| 1754 } | |
| 1755 | |
| 1756 // The slow path | |
| 1757 call_vm( | |
| 1758 builder()->new_instance(), | |
| 1759 LLVMValue::jint_constant(iter()->get_klass_index()), | |
| 1760 EX_CHECK_FULL); | |
| 1761 slow_object = get_vm_result(); | |
| 1762 got_slow = builder()->GetInsertBlock(); | |
| 1763 | |
| 1764 // Push the object | |
| 1765 if (push_object) { | |
| 1766 builder()->CreateBr(push_object); | |
| 1767 builder()->SetInsertPoint(push_object); | |
| 1768 } | |
| 1769 if (fast_object) { | |
| 1770 PHINode *phi = builder()->CreatePHI(SharkType::oop_type(), "object"); | |
| 1771 phi->addIncoming(fast_object, got_fast); | |
| 1772 phi->addIncoming(slow_object, got_slow); | |
| 1773 object = phi; | |
| 1774 current_state()->merge(fast_state, got_fast, got_slow); | |
| 1775 } | |
| 1776 else { | |
| 1777 object = slow_object; | |
| 1778 } | |
| 1779 | |
| 1780 push(SharkValue::create_jobject(object, true)); | |
| 1781 } | |
| 1782 | |
| 1783 void SharkTopLevelBlock::do_newarray() { | |
| 1784 BasicType type = (BasicType) iter()->get_index(); | |
| 1785 | |
| 1786 call_vm( | |
| 1787 builder()->newarray(), | |
| 1788 LLVMValue::jint_constant(type), | |
| 1789 pop()->jint_value(), | |
| 1790 EX_CHECK_FULL); | |
| 1791 | |
| 1792 ciArrayKlass *array_klass = ciArrayKlass::make(ciType::make(type)); | |
| 1793 push(SharkValue::create_generic(array_klass, get_vm_result(), true)); | |
| 1794 } | |
| 1795 | |
| 1796 void SharkTopLevelBlock::do_anewarray() { | |
| 1797 bool will_link; | |
| 1798 ciKlass *klass = iter()->get_klass(will_link); | |
| 1799 assert(will_link, "typeflow responsibility"); | |
| 1800 | |
| 1801 ciObjArrayKlass *array_klass = ciObjArrayKlass::make(klass); | |
| 1802 if (!array_klass->is_loaded()) { | |
| 1803 Unimplemented(); | |
| 1804 } | |
| 1805 | |
| 1806 call_vm( | |
| 1807 builder()->anewarray(), | |
| 1808 LLVMValue::jint_constant(iter()->get_klass_index()), | |
| 1809 pop()->jint_value(), | |
| 1810 EX_CHECK_FULL); | |
| 1811 | |
| 1812 push(SharkValue::create_generic(array_klass, get_vm_result(), true)); | |
| 1813 } | |
| 1814 | |
| 1815 void SharkTopLevelBlock::do_multianewarray() { | |
| 1816 bool will_link; | |
| 1817 ciArrayKlass *array_klass = iter()->get_klass(will_link)->as_array_klass(); | |
| 1818 assert(will_link, "typeflow responsibility"); | |
| 1819 | |
| 1820 // The dimensions are stack values, so we use their slots for the | |
| 1821 // dimensions array. Note that we are storing them in the reverse | |
| 1822 // of normal stack order. | |
| 1823 int ndims = iter()->get_dimensions(); | |
| 1824 | |
| 1825 Value *dimensions = stack()->slot_addr( | |
| 1826 stack()->stack_slots_offset() + max_stack() - xstack_depth(), | |
| 1827 ArrayType::get(SharkType::jint_type(), ndims), | |
| 1828 "dimensions"); | |
| 1829 | |
| 1830 for (int i = 0; i < ndims; i++) { | |
| 1831 builder()->CreateStore( | |
| 1832 xstack(ndims - 1 - i)->jint_value(), | |
| 1833 builder()->CreateStructGEP(dimensions, i)); | |
| 1834 } | |
| 1835 | |
| 1836 call_vm( | |
| 1837 builder()->multianewarray(), | |
| 1838 LLVMValue::jint_constant(iter()->get_klass_index()), | |
| 1839 LLVMValue::jint_constant(ndims), | |
| 1840 builder()->CreateStructGEP(dimensions, 0), | |
| 1841 EX_CHECK_FULL); | |
| 1842 | |
| 1843 // Now we can pop the dimensions off the stack | |
| 1844 for (int i = 0; i < ndims; i++) | |
| 1845 pop(); | |
| 1846 | |
| 1847 push(SharkValue::create_generic(array_klass, get_vm_result(), true)); | |
| 1848 } | |
| 1849 | |
| 1850 void SharkTopLevelBlock::acquire_method_lock() { | |
| 1851 Value *lockee; | |
| 1852 if (target()->is_static()) | |
| 1853 lockee = builder()->CreateInlineOop(target()->holder()->java_mirror()); | |
| 1854 else | |
| 1855 lockee = local(0)->jobject_value(); | |
| 1856 | |
| 1857 iter()->force_bci(start()); // for the decache in acquire_lock | |
| 1858 acquire_lock(lockee, EX_CHECK_NO_CATCH); | |
| 1859 } | |
| 1860 | |
| 1861 void SharkTopLevelBlock::do_monitorenter() { | |
| 1862 SharkValue *lockee = pop(); | |
| 1863 check_null(lockee); | |
| 1864 acquire_lock(lockee->jobject_value(), EX_CHECK_FULL); | |
| 1865 } | |
| 1866 | |
| 1867 void SharkTopLevelBlock::do_monitorexit() { | |
| 1868 pop(); // don't need this (monitors are block structured) | |
| 1869 release_lock(EX_CHECK_NO_CATCH); | |
| 1870 } | |
| 1871 | |
| 1872 void SharkTopLevelBlock::acquire_lock(Value *lockee, int exception_action) { | |
| 1873 BasicBlock *try_recursive = function()->CreateBlock("try_recursive"); | |
| 1874 BasicBlock *got_recursive = function()->CreateBlock("got_recursive"); | |
| 1875 BasicBlock *not_recursive = function()->CreateBlock("not_recursive"); | |
| 1876 BasicBlock *acquired_fast = function()->CreateBlock("acquired_fast"); | |
| 1877 BasicBlock *lock_acquired = function()->CreateBlock("lock_acquired"); | |
| 1878 | |
| 1879 int monitor = num_monitors(); | |
| 1880 Value *monitor_addr = stack()->monitor_addr(monitor); | |
| 1881 Value *monitor_object_addr = stack()->monitor_object_addr(monitor); | |
| 1882 Value *monitor_header_addr = stack()->monitor_header_addr(monitor); | |
| 1883 | |
| 1884 // Store the object and mark the slot as live | |
| 1885 builder()->CreateStore(lockee, monitor_object_addr); | |
| 1886 set_num_monitors(monitor + 1); | |
| 1887 | |
| 1888 // Try a simple lock | |
| 1889 Value *mark_addr = builder()->CreateAddressOfStructEntry( | |
| 1890 lockee, in_ByteSize(oopDesc::mark_offset_in_bytes()), | |
| 1891 PointerType::getUnqual(SharkType::intptr_type()), | |
| 1892 "mark_addr"); | |
| 1893 | |
| 1894 Value *mark = builder()->CreateLoad(mark_addr, "mark"); | |
| 1895 Value *disp = builder()->CreateOr( | |
| 1896 mark, LLVMValue::intptr_constant(markOopDesc::unlocked_value), "disp"); | |
| 1897 builder()->CreateStore(disp, monitor_header_addr); | |
| 1898 | |
| 1899 Value *lock = builder()->CreatePtrToInt( | |
| 1900 monitor_header_addr, SharkType::intptr_type()); | |
| 1901 Value *check = builder()->CreateCmpxchgPtr(lock, mark_addr, disp); | |
| 1902 builder()->CreateCondBr( | |
| 1903 builder()->CreateICmpEQ(disp, check), | |
| 1904 acquired_fast, try_recursive); | |
| 1905 | |
| 1906 // Locking failed, but maybe this thread already owns it | |
| 1907 builder()->SetInsertPoint(try_recursive); | |
| 1908 Value *addr = builder()->CreateAnd( | |
| 1909 disp, | |
| 1910 LLVMValue::intptr_constant(~markOopDesc::lock_mask_in_place)); | |
| 1911 | |
| 1912 // NB we use the entire stack, but JavaThread::is_lock_owned() | |
| 1913 // uses a more limited range. I don't think it hurts though... | |
| 1914 Value *stack_limit = builder()->CreateValueOfStructEntry( | |
| 1915 thread(), Thread::stack_base_offset(), | |
| 1916 SharkType::intptr_type(), | |
| 1917 "stack_limit"); | |
| 1918 | |
| 1919 assert(sizeof(size_t) == sizeof(intptr_t), "should be"); | |
| 1920 Value *stack_size = builder()->CreateValueOfStructEntry( | |
| 1921 thread(), Thread::stack_size_offset(), | |
| 1922 SharkType::intptr_type(), | |
| 1923 "stack_size"); | |
| 1924 | |
| 1925 Value *stack_start = | |
| 1926 builder()->CreateSub(stack_limit, stack_size, "stack_start"); | |
| 1927 | |
| 1928 builder()->CreateCondBr( | |
| 1929 builder()->CreateAnd( | |
| 1930 builder()->CreateICmpUGE(addr, stack_start), | |
| 1931 builder()->CreateICmpULT(addr, stack_limit)), | |
| 1932 got_recursive, not_recursive); | |
| 1933 | |
| 1934 builder()->SetInsertPoint(got_recursive); | |
| 1935 builder()->CreateStore(LLVMValue::intptr_constant(0), monitor_header_addr); | |
| 1936 builder()->CreateBr(acquired_fast); | |
| 1937 | |
| 1938 // Create an edge for the state merge | |
| 1939 builder()->SetInsertPoint(acquired_fast); | |
| 1940 SharkState *fast_state = current_state()->copy(); | |
| 1941 builder()->CreateBr(lock_acquired); | |
| 1942 | |
| 1943 // It's not a recursive case so we need to drop into the runtime | |
| 1944 builder()->SetInsertPoint(not_recursive); | |
| 1945 call_vm( | |
| 1946 builder()->monitorenter(), monitor_addr, | |
| 1947 exception_action | EAM_MONITOR_FUDGE); | |
| 1948 BasicBlock *acquired_slow = builder()->GetInsertBlock(); | |
| 1949 builder()->CreateBr(lock_acquired); | |
| 1950 | |
| 1951 // All done | |
| 1952 builder()->SetInsertPoint(lock_acquired); | |
| 1953 current_state()->merge(fast_state, acquired_fast, acquired_slow); | |
| 1954 } | |
| 1955 | |
| 1956 void SharkTopLevelBlock::release_lock(int exception_action) { | |
| 1957 BasicBlock *not_recursive = function()->CreateBlock("not_recursive"); | |
| 1958 BasicBlock *released_fast = function()->CreateBlock("released_fast"); | |
| 1959 BasicBlock *slow_path = function()->CreateBlock("slow_path"); | |
| 1960 BasicBlock *lock_released = function()->CreateBlock("lock_released"); | |
| 1961 | |
| 1962 int monitor = num_monitors() - 1; | |
| 1963 Value *monitor_addr = stack()->monitor_addr(monitor); | |
| 1964 Value *monitor_object_addr = stack()->monitor_object_addr(monitor); | |
| 1965 Value *monitor_header_addr = stack()->monitor_header_addr(monitor); | |
| 1966 | |
| 1967 // If it is recursive then we're already done | |
| 1968 Value *disp = builder()->CreateLoad(monitor_header_addr); | |
| 1969 builder()->CreateCondBr( | |
| 1970 builder()->CreateICmpEQ(disp, LLVMValue::intptr_constant(0)), | |
| 1971 released_fast, not_recursive); | |
| 1972 | |
| 1973 // Try a simple unlock | |
| 1974 builder()->SetInsertPoint(not_recursive); | |
| 1975 | |
| 1976 Value *lock = builder()->CreatePtrToInt( | |
| 1977 monitor_header_addr, SharkType::intptr_type()); | |
| 1978 | |
| 1979 Value *lockee = builder()->CreateLoad(monitor_object_addr); | |
| 1980 | |
| 1981 Value *mark_addr = builder()->CreateAddressOfStructEntry( | |
| 1982 lockee, in_ByteSize(oopDesc::mark_offset_in_bytes()), | |
| 1983 PointerType::getUnqual(SharkType::intptr_type()), | |
| 1984 "mark_addr"); | |
| 1985 | |
| 1986 Value *check = builder()->CreateCmpxchgPtr(disp, mark_addr, lock); | |
| 1987 builder()->CreateCondBr( | |
| 1988 builder()->CreateICmpEQ(lock, check), | |
| 1989 released_fast, slow_path); | |
| 1990 | |
| 1991 // Create an edge for the state merge | |
| 1992 builder()->SetInsertPoint(released_fast); | |
| 1993 SharkState *fast_state = current_state()->copy(); | |
| 1994 builder()->CreateBr(lock_released); | |
| 1995 | |
| 1996 // Need to drop into the runtime to release this one | |
| 1997 builder()->SetInsertPoint(slow_path); | |
| 1998 call_vm(builder()->monitorexit(), monitor_addr, exception_action); | |
| 1999 BasicBlock *released_slow = builder()->GetInsertBlock(); | |
| 2000 builder()->CreateBr(lock_released); | |
| 2001 | |
| 2002 // All done | |
| 2003 builder()->SetInsertPoint(lock_released); | |
| 2004 current_state()->merge(fast_state, released_fast, released_slow); | |
| 2005 | |
| 2006 // The object slot is now dead | |
| 2007 set_num_monitors(monitor); | |
| 2008 } |