1 /* 2 * Copyright (c) 2002, 2013, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. 8 * 9 * This code is distributed in the hope that it will be useful, but WITHOUT 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 12 * version 2 for more details (a copy is included in the LICENSE file that 13 * accompanied this code). 14 * 15 * You should have received a copy of the GNU General Public License version 16 * 2 along with this work; if not, write to the Free Software Foundation, 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 18 * 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 20 * or visit www.oracle.com if you need additional information or have any 21 * questions. 22 * 23 */ 24 25 // no precompiled headers 26 #include "classfile/vmSymbols.hpp" 27 #include "gc_interface/collectedHeap.hpp" 28 #include "interpreter/bytecodeHistogram.hpp" 29 #include "interpreter/bytecodeInterpreter.hpp" 30 #include "interpreter/bytecodeInterpreter.inline.hpp" 31 #include "interpreter/bytecodeInterpreterProfiling.hpp" 32 #include "interpreter/interpreter.hpp" 33 #include "interpreter/interpreterRuntime.hpp" 34 #include "memory/resourceArea.hpp" 35 #include "oops/methodCounters.hpp" 36 #include "oops/objArrayKlass.hpp" 37 #include "oops/oop.inline.hpp" 38 #include "prims/jvmtiExport.hpp" 39 #include "prims/jvmtiThreadState.hpp" 40 #include "runtime/atomic.inline.hpp" 41 #include "runtime/biasedLocking.hpp" 42 #include "runtime/frame.inline.hpp" 43 #include "runtime/handles.inline.hpp" 44 #include "runtime/interfaceSupport.hpp" 45 #include "runtime/orderAccess.inline.hpp" 46 #include "runtime/sharedRuntime.hpp" 47 #include "runtime/threadCritical.hpp" 48 #include "utilities/exceptions.hpp" 49 50 // no precompiled headers 51 #ifdef CC_INTERP 52 53 /* 54 * USELABELS - If using GCC, then use labels for the opcode dispatching 55 * rather -then a switch statement. This improves performance because it 56 * gives us the oportunity to have the instructions that calculate the 57 * next opcode to jump to be intermixed with the rest of the instructions 58 * that implement the opcode (see UPDATE_PC_AND_TOS_AND_CONTINUE macro). 59 */ 60 #undef USELABELS 61 #ifdef __GNUC__ 62 /* 63 ASSERT signifies debugging. It is much easier to step thru bytecodes if we 64 don't use the computed goto approach. 65 */ 66 #ifndef ASSERT 67 #define USELABELS 68 #endif 69 #endif 70 71 #undef CASE 72 #ifdef USELABELS 73 #define CASE(opcode) opc ## opcode 74 #define DEFAULT opc_default 75 #else 76 #define CASE(opcode) case Bytecodes:: opcode 77 #define DEFAULT default 78 #endif 79 80 /* 81 * PREFETCH_OPCCODE - Some compilers do better if you prefetch the next 82 * opcode before going back to the top of the while loop, rather then having 83 * the top of the while loop handle it. This provides a better opportunity 84 * for instruction scheduling. Some compilers just do this prefetch 85 * automatically. Some actually end up with worse performance if you 86 * force the prefetch. Solaris gcc seems to do better, but cc does worse. 87 */ 88 #undef PREFETCH_OPCCODE 89 #define PREFETCH_OPCCODE 90 91 /* 92 Interpreter safepoint: it is expected that the interpreter will have no live 93 handles of its own creation live at an interpreter safepoint. Therefore we 94 run a HandleMarkCleaner and trash all handles allocated in the call chain 95 since the JavaCalls::call_helper invocation that initiated the chain. 96 There really shouldn't be any handles remaining to trash but this is cheap 97 in relation to a safepoint. 98 */ 99 #define SAFEPOINT \ 100 if ( SafepointSynchronize::is_synchronizing()) { \ 101 { \ 102 /* zap freed handles rather than GC'ing them */ \ 103 HandleMarkCleaner __hmc(THREAD); \ 104 } \ 105 CALL_VM(SafepointSynchronize::block(THREAD), handle_exception); \ 106 } 107 108 /* 109 * VM_JAVA_ERROR - Macro for throwing a java exception from 110 * the interpreter loop. Should really be a CALL_VM but there 111 * is no entry point to do the transition to vm so we just 112 * do it by hand here. 113 */ 114 #define VM_JAVA_ERROR_NO_JUMP(name, msg, note_a_trap) \ 115 DECACHE_STATE(); \ 116 SET_LAST_JAVA_FRAME(); \ 117 { \ 118 InterpreterRuntime::note_a_trap(THREAD, istate->method(), BCI()); \ 119 ThreadInVMfromJava trans(THREAD); \ 120 Exceptions::_throw_msg(THREAD, __FILE__, __LINE__, name, msg); \ 121 } \ 122 RESET_LAST_JAVA_FRAME(); \ 123 CACHE_STATE(); 124 125 // Normal throw of a java error. 126 #define VM_JAVA_ERROR(name, msg, note_a_trap) \ 127 VM_JAVA_ERROR_NO_JUMP(name, msg, note_a_trap) \ 128 goto handle_exception; 129 130 #ifdef PRODUCT 131 #define DO_UPDATE_INSTRUCTION_COUNT(opcode) 132 #else 133 #define DO_UPDATE_INSTRUCTION_COUNT(opcode) \ 134 { \ 135 BytecodeCounter::_counter_value++; \ 136 BytecodeHistogram::_counters[(Bytecodes::Code)opcode]++; \ 137 if (StopInterpreterAt && StopInterpreterAt == BytecodeCounter::_counter_value) os::breakpoint(); \ 138 if (TraceBytecodes) { \ 139 CALL_VM((void)SharedRuntime::trace_bytecode(THREAD, 0, \ 140 topOfStack[Interpreter::expr_index_at(1)], \ 141 topOfStack[Interpreter::expr_index_at(2)]), \ 142 handle_exception); \ 143 } \ 144 } 145 #endif 146 147 #undef DEBUGGER_SINGLE_STEP_NOTIFY 148 #ifdef VM_JVMTI 149 /* NOTE: (kbr) This macro must be called AFTER the PC has been 150 incremented. JvmtiExport::at_single_stepping_point() may cause a 151 breakpoint opcode to get inserted at the current PC to allow the 152 debugger to coalesce single-step events. 153 154 As a result if we call at_single_stepping_point() we refetch opcode 155 to get the current opcode. This will override any other prefetching 156 that might have occurred. 157 */ 158 #define DEBUGGER_SINGLE_STEP_NOTIFY() \ 159 { \ 160 if (_jvmti_interp_events) { \ 161 if (JvmtiExport::should_post_single_step()) { \ 162 DECACHE_STATE(); \ 163 SET_LAST_JAVA_FRAME(); \ 164 ThreadInVMfromJava trans(THREAD); \ 165 JvmtiExport::at_single_stepping_point(THREAD, \ 166 istate->method(), \ 167 pc); \ 168 RESET_LAST_JAVA_FRAME(); \ 169 CACHE_STATE(); \ 170 if (THREAD->pop_frame_pending() && \ 171 !THREAD->pop_frame_in_process()) { \ 172 goto handle_Pop_Frame; \ 173 } \ 174 if (THREAD->jvmti_thread_state() && \ 175 THREAD->jvmti_thread_state()->is_earlyret_pending()) { \ 176 goto handle_Early_Return; \ 177 } \ 178 opcode = *pc; \ 179 } \ 180 } \ 181 } 182 #else 183 #define DEBUGGER_SINGLE_STEP_NOTIFY() 184 #endif 185 186 /* 187 * CONTINUE - Macro for executing the next opcode. 188 */ 189 #undef CONTINUE 190 #ifdef USELABELS 191 // Have to do this dispatch this way in C++ because otherwise gcc complains about crossing an 192 // initialization (which is is the initialization of the table pointer...) 193 #define DISPATCH(opcode) goto *(void*)dispatch_table[opcode] 194 #define CONTINUE { \ 195 opcode = *pc; \ 196 DO_UPDATE_INSTRUCTION_COUNT(opcode); \ 197 DEBUGGER_SINGLE_STEP_NOTIFY(); \ 198 DISPATCH(opcode); \ 199 } 200 #else 201 #ifdef PREFETCH_OPCCODE 202 #define CONTINUE { \ 203 opcode = *pc; \ 204 DO_UPDATE_INSTRUCTION_COUNT(opcode); \ 205 DEBUGGER_SINGLE_STEP_NOTIFY(); \ 206 continue; \ 207 } 208 #else 209 #define CONTINUE { \ 210 DO_UPDATE_INSTRUCTION_COUNT(opcode); \ 211 DEBUGGER_SINGLE_STEP_NOTIFY(); \ 212 continue; \ 213 } 214 #endif 215 #endif 216 217 218 #define UPDATE_PC(opsize) {pc += opsize; } 219 /* 220 * UPDATE_PC_AND_TOS - Macro for updating the pc and topOfStack. 221 */ 222 #undef UPDATE_PC_AND_TOS 223 #define UPDATE_PC_AND_TOS(opsize, stack) \ 224 {pc += opsize; MORE_STACK(stack); } 225 226 /* 227 * UPDATE_PC_AND_TOS_AND_CONTINUE - Macro for updating the pc and topOfStack, 228 * and executing the next opcode. It's somewhat similar to the combination 229 * of UPDATE_PC_AND_TOS and CONTINUE, but with some minor optimizations. 230 */ 231 #undef UPDATE_PC_AND_TOS_AND_CONTINUE 232 #ifdef USELABELS 233 #define UPDATE_PC_AND_TOS_AND_CONTINUE(opsize, stack) { \ 234 pc += opsize; opcode = *pc; MORE_STACK(stack); \ 235 DO_UPDATE_INSTRUCTION_COUNT(opcode); \ 236 DEBUGGER_SINGLE_STEP_NOTIFY(); \ 237 DISPATCH(opcode); \ 238 } 239 240 #define UPDATE_PC_AND_CONTINUE(opsize) { \ 241 pc += opsize; opcode = *pc; \ 242 DO_UPDATE_INSTRUCTION_COUNT(opcode); \ 243 DEBUGGER_SINGLE_STEP_NOTIFY(); \ 244 DISPATCH(opcode); \ 245 } 246 #else 247 #ifdef PREFETCH_OPCCODE 248 #define UPDATE_PC_AND_TOS_AND_CONTINUE(opsize, stack) { \ 249 pc += opsize; opcode = *pc; MORE_STACK(stack); \ 250 DO_UPDATE_INSTRUCTION_COUNT(opcode); \ 251 DEBUGGER_SINGLE_STEP_NOTIFY(); \ 252 goto do_continue; \ 253 } 254 255 #define UPDATE_PC_AND_CONTINUE(opsize) { \ 256 pc += opsize; opcode = *pc; \ 257 DO_UPDATE_INSTRUCTION_COUNT(opcode); \ 258 DEBUGGER_SINGLE_STEP_NOTIFY(); \ 259 goto do_continue; \ 260 } 261 #else 262 #define UPDATE_PC_AND_TOS_AND_CONTINUE(opsize, stack) { \ 263 pc += opsize; MORE_STACK(stack); \ 264 DO_UPDATE_INSTRUCTION_COUNT(opcode); \ 265 DEBUGGER_SINGLE_STEP_NOTIFY(); \ 266 goto do_continue; \ 267 } 268 269 #define UPDATE_PC_AND_CONTINUE(opsize) { \ 270 pc += opsize; \ 271 DO_UPDATE_INSTRUCTION_COUNT(opcode); \ 272 DEBUGGER_SINGLE_STEP_NOTIFY(); \ 273 goto do_continue; \ 274 } 275 #endif /* PREFETCH_OPCCODE */ 276 #endif /* USELABELS */ 277 278 // About to call a new method, update the save the adjusted pc and return to frame manager 279 #define UPDATE_PC_AND_RETURN(opsize) \ 280 DECACHE_TOS(); \ 281 istate->set_bcp(pc+opsize); \ 282 return; 283 284 285 #define METHOD istate->method() 286 #define GET_METHOD_COUNTERS(res) \ 287 res = METHOD->method_counters(); \ 288 if (res == NULL) { \ 289 CALL_VM(res = InterpreterRuntime::build_method_counters(THREAD, METHOD), handle_exception); \ 290 } 291 292 #define OSR_REQUEST(res, branch_pc) \ 293 CALL_VM(res=InterpreterRuntime::frequency_counter_overflow(THREAD, branch_pc), handle_exception); 294 /* 295 * For those opcodes that need to have a GC point on a backwards branch 296 */ 297 298 // Backedge counting is kind of strange. The asm interpreter will increment 299 // the backedge counter as a separate counter but it does it's comparisons 300 // to the sum (scaled) of invocation counter and backedge count to make 301 // a decision. Seems kind of odd to sum them together like that 302 303 // skip is delta from current bcp/bci for target, branch_pc is pre-branch bcp 304 305 306 #define DO_BACKEDGE_CHECKS(skip, branch_pc) \ 307 if ((skip) <= 0) { \ 308 MethodCounters* mcs; \ 309 GET_METHOD_COUNTERS(mcs); \ 310 if (UseLoopCounter) { \ 311 bool do_OSR = UseOnStackReplacement; \ 312 mcs->backedge_counter()->increment(); \ 313 if (ProfileInterpreter) { \ 314 BI_PROFILE_GET_OR_CREATE_METHOD_DATA(handle_exception); \ 315 /* Check for overflow against MDO count. */ \ 316 do_OSR = do_OSR \ 317 && (mdo_last_branch_taken_count >= (uint)InvocationCounter::InterpreterBackwardBranchLimit)\ 318 /* When ProfileInterpreter is on, the backedge_count comes */ \ 319 /* from the methodDataOop, which value does not get reset on */ \ 320 /* the call to frequency_counter_overflow(). To avoid */ \ 321 /* excessive calls to the overflow routine while the method is */ \ 322 /* being compiled, add a second test to make sure the overflow */ \ 323 /* function is called only once every overflow_frequency. */ \ 324 && (!(mdo_last_branch_taken_count & 1023)); \ 325 } else { \ 326 /* check for overflow of backedge counter */ \ 327 do_OSR = do_OSR \ 328 && mcs->invocation_counter()->reached_InvocationLimit(mcs->backedge_counter()); \ 329 } \ 330 if (do_OSR) { \ 331 nmethod* osr_nmethod; \ 332 OSR_REQUEST(osr_nmethod, branch_pc); \ 333 if (osr_nmethod != NULL && osr_nmethod->osr_entry_bci() != InvalidOSREntryBci) { \ 334 intptr_t* buf; \ 335 /* Call OSR migration with last java frame only, no checks. */ \ 336 CALL_VM_NAKED_LJF(buf=SharedRuntime::OSR_migration_begin(THREAD)); \ 337 istate->set_msg(do_osr); \ 338 istate->set_osr_buf((address)buf); \ 339 istate->set_osr_entry(osr_nmethod->osr_entry()); \ 340 return; \ 341 } \ 342 } \ 343 } /* UseCompiler ... */ \ 344 SAFEPOINT; \ 345 } 346 347 /* 348 * For those opcodes that need to have a GC point on a backwards branch 349 */ 350 351 /* 352 * Macros for caching and flushing the interpreter state. Some local 353 * variables need to be flushed out to the frame before we do certain 354 * things (like pushing frames or becomming gc safe) and some need to 355 * be recached later (like after popping a frame). We could use one 356 * macro to cache or decache everything, but this would be less then 357 * optimal because we don't always need to cache or decache everything 358 * because some things we know are already cached or decached. 359 */ 360 #undef DECACHE_TOS 361 #undef CACHE_TOS 362 #undef CACHE_PREV_TOS 363 #define DECACHE_TOS() istate->set_stack(topOfStack); 364 365 #define CACHE_TOS() topOfStack = (intptr_t *)istate->stack(); 366 367 #undef DECACHE_PC 368 #undef CACHE_PC 369 #define DECACHE_PC() istate->set_bcp(pc); 370 #define CACHE_PC() pc = istate->bcp(); 371 #define CACHE_CP() cp = istate->constants(); 372 #define CACHE_LOCALS() locals = istate->locals(); 373 #undef CACHE_FRAME 374 #define CACHE_FRAME() 375 376 // BCI() returns the current bytecode-index. 377 #undef BCI 378 #define BCI() ((int)(intptr_t)(pc - (intptr_t)istate->method()->code_base())) 379 380 /* 381 * CHECK_NULL - Macro for throwing a NullPointerException if the object 382 * passed is a null ref. 383 * On some architectures/platforms it should be possible to do this implicitly 384 */ 385 #undef CHECK_NULL 386 #define CHECK_NULL(obj_) \ 387 if ((obj_) == NULL) { \ 388 VM_JAVA_ERROR(vmSymbols::java_lang_NullPointerException(), NULL, note_nullCheck_trap); \ 389 } \ 390 VERIFY_OOP(obj_) 391 392 #define VMdoubleConstZero() 0.0 393 #define VMdoubleConstOne() 1.0 394 #define VMlongConstZero() (max_jlong-max_jlong) 395 #define VMlongConstOne() ((max_jlong-max_jlong)+1) 396 397 /* 398 * Alignment 399 */ 400 #define VMalignWordUp(val) (((uintptr_t)(val) + 3) & ~3) 401 402 // Decache the interpreter state that interpreter modifies directly (i.e. GC is indirect mod) 403 #define DECACHE_STATE() DECACHE_PC(); DECACHE_TOS(); 404 405 // Reload interpreter state after calling the VM or a possible GC 406 #define CACHE_STATE() \ 407 CACHE_TOS(); \ 408 CACHE_PC(); \ 409 CACHE_CP(); \ 410 CACHE_LOCALS(); 411 412 // Call the VM with last java frame only. 413 #define CALL_VM_NAKED_LJF(func) \ 414 DECACHE_STATE(); \ 415 SET_LAST_JAVA_FRAME(); \ 416 func; \ 417 RESET_LAST_JAVA_FRAME(); \ 418 CACHE_STATE(); 419 420 // Call the VM. Don't check for pending exceptions. 421 #define CALL_VM_NOCHECK(func) \ 422 CALL_VM_NAKED_LJF(func) \ 423 if (THREAD->pop_frame_pending() && \ 424 !THREAD->pop_frame_in_process()) { \ 425 goto handle_Pop_Frame; \ 426 } \ 427 if (THREAD->jvmti_thread_state() && \ 428 THREAD->jvmti_thread_state()->is_earlyret_pending()) { \ 429 goto handle_Early_Return; \ 430 } 431 432 // Call the VM and check for pending exceptions 433 #define CALL_VM(func, label) { \ 434 CALL_VM_NOCHECK(func); \ 435 if (THREAD->has_pending_exception()) goto label; \ 436 } 437 438 /* 439 * BytecodeInterpreter::run(interpreterState istate) 440 * BytecodeInterpreter::runWithChecks(interpreterState istate) 441 * 442 * The real deal. This is where byte codes actually get interpreted. 443 * Basically it's a big while loop that iterates until we return from 444 * the method passed in. 445 * 446 * The runWithChecks is used if JVMTI is enabled. 447 * 448 */ 449 #if defined(VM_JVMTI) 450 void 451 BytecodeInterpreter::runWithChecks(interpreterState istate) { 452 #else 453 void 454 BytecodeInterpreter::run(interpreterState istate) { 455 #endif 456 457 // In order to simplify some tests based on switches set at runtime 458 // we invoke the interpreter a single time after switches are enabled 459 // and set simpler to to test variables rather than method calls or complex 460 // boolean expressions. 461 462 static int initialized = 0; 463 static int checkit = 0; 464 static intptr_t* c_addr = NULL; 465 static intptr_t c_value; 466 467 if (checkit && *c_addr != c_value) { 468 os::breakpoint(); 469 } 470 #ifdef VM_JVMTI 471 static bool _jvmti_interp_events = 0; 472 #endif 473 474 static int _compiling; // (UseCompiler || CountCompiledCalls) 475 476 #ifdef ASSERT 477 if (istate->_msg != initialize) { 478 // We have a problem here if we are running with a pre-hsx24 JDK (for example during bootstrap) 479 // because in that case, EnableInvokeDynamic is true by default but will be later switched off 480 // if java_lang_invoke_MethodHandle::compute_offsets() detects that the JDK only has the classes 481 // for the old JSR292 implementation. 482 // This leads to a situation where 'istate->_stack_limit' always accounts for 483 // methodOopDesc::extra_stack_entries() because it is computed in 484 // CppInterpreterGenerator::generate_compute_interpreter_state() which was generated while 485 // EnableInvokeDynamic was still true. On the other hand, istate->_method->max_stack() doesn't 486 // account for extra_stack_entries() anymore because at the time when it is called 487 // EnableInvokeDynamic was already set to false. 488 // So we have a second version of the assertion which handles the case where EnableInvokeDynamic was 489 // switched off because of the wrong classes. 490 if (EnableInvokeDynamic || FLAG_IS_CMDLINE(EnableInvokeDynamic)) { 491 assert(labs(istate->_stack_base - istate->_stack_limit) == (istate->_method->max_stack() + 1), "bad stack limit"); 492 } else { 493 const int extra_stack_entries = Method::extra_stack_entries_for_jsr292; 494 assert(labs(istate->_stack_base - istate->_stack_limit) == (istate->_method->max_stack() + extra_stack_entries 495 + 1), "bad stack limit"); 496 } 497 #ifndef SHARK 498 IA32_ONLY(assert(istate->_stack_limit == istate->_thread->last_Java_sp() + 1, "wrong")); 499 #endif // !SHARK 500 } 501 // Verify linkages. 502 interpreterState l = istate; 503 do { 504 assert(l == l->_self_link, "bad link"); 505 l = l->_prev_link; 506 } while (l != NULL); 507 // Screwups with stack management usually cause us to overwrite istate 508 // save a copy so we can verify it. 509 interpreterState orig = istate; 510 #endif 511 512 register intptr_t* topOfStack = (intptr_t *)istate->stack(); /* access with STACK macros */ 513 register address pc = istate->bcp(); 514 register jubyte opcode; 515 register intptr_t* locals = istate->locals(); 516 register ConstantPoolCache* cp = istate->constants(); // method()->constants()->cache() 517 #ifdef LOTS_OF_REGS 518 register JavaThread* THREAD = istate->thread(); 519 #else 520 #undef THREAD 521 #define THREAD istate->thread() 522 #endif 523 524 #ifdef USELABELS 525 const static void* const opclabels_data[256] = { 526 /* 0x00 */ &&opc_nop, &&opc_aconst_null,&&opc_iconst_m1,&&opc_iconst_0, 527 /* 0x04 */ &&opc_iconst_1,&&opc_iconst_2, &&opc_iconst_3, &&opc_iconst_4, 528 /* 0x08 */ &&opc_iconst_5,&&opc_lconst_0, &&opc_lconst_1, &&opc_fconst_0, 529 /* 0x0C */ &&opc_fconst_1,&&opc_fconst_2, &&opc_dconst_0, &&opc_dconst_1, 530 531 /* 0x10 */ &&opc_bipush, &&opc_sipush, &&opc_ldc, &&opc_ldc_w, 532 /* 0x14 */ &&opc_ldc2_w, &&opc_iload, &&opc_lload, &&opc_fload, 533 /* 0x18 */ &&opc_dload, &&opc_aload, &&opc_iload_0,&&opc_iload_1, 534 /* 0x1C */ &&opc_iload_2,&&opc_iload_3,&&opc_lload_0,&&opc_lload_1, 535 536 /* 0x20 */ &&opc_lload_2,&&opc_lload_3,&&opc_fload_0,&&opc_fload_1, 537 /* 0x24 */ &&opc_fload_2,&&opc_fload_3,&&opc_dload_0,&&opc_dload_1, 538 /* 0x28 */ &&opc_dload_2,&&opc_dload_3,&&opc_aload_0,&&opc_aload_1, 539 /* 0x2C */ &&opc_aload_2,&&opc_aload_3,&&opc_iaload, &&opc_laload, 540 541 /* 0x30 */ &&opc_faload, &&opc_daload, &&opc_aaload, &&opc_baload, 542 /* 0x34 */ &&opc_caload, &&opc_saload, &&opc_istore, &&opc_lstore, 543 /* 0x38 */ &&opc_fstore, &&opc_dstore, &&opc_astore, &&opc_istore_0, 544 /* 0x3C */ &&opc_istore_1,&&opc_istore_2,&&opc_istore_3,&&opc_lstore_0, 545 546 /* 0x40 */ &&opc_lstore_1,&&opc_lstore_2,&&opc_lstore_3,&&opc_fstore_0, 547 /* 0x44 */ &&opc_fstore_1,&&opc_fstore_2,&&opc_fstore_3,&&opc_dstore_0, 548 /* 0x48 */ &&opc_dstore_1,&&opc_dstore_2,&&opc_dstore_3,&&opc_astore_0, 549 /* 0x4C */ &&opc_astore_1,&&opc_astore_2,&&opc_astore_3,&&opc_iastore, 550 551 /* 0x50 */ &&opc_lastore,&&opc_fastore,&&opc_dastore,&&opc_aastore, 552 /* 0x54 */ &&opc_bastore,&&opc_castore,&&opc_sastore,&&opc_pop, 553 /* 0x58 */ &&opc_pop2, &&opc_dup, &&opc_dup_x1, &&opc_dup_x2, 554 /* 0x5C */ &&opc_dup2, &&opc_dup2_x1,&&opc_dup2_x2,&&opc_swap, 555 556 /* 0x60 */ &&opc_iadd,&&opc_ladd,&&opc_fadd,&&opc_dadd, 557 /* 0x64 */ &&opc_isub,&&opc_lsub,&&opc_fsub,&&opc_dsub, 558 /* 0x68 */ &&opc_imul,&&opc_lmul,&&opc_fmul,&&opc_dmul, 559 /* 0x6C */ &&opc_idiv,&&opc_ldiv,&&opc_fdiv,&&opc_ddiv, 560 561 /* 0x70 */ &&opc_irem, &&opc_lrem, &&opc_frem,&&opc_drem, 562 /* 0x74 */ &&opc_ineg, &&opc_lneg, &&opc_fneg,&&opc_dneg, 563 /* 0x78 */ &&opc_ishl, &&opc_lshl, &&opc_ishr,&&opc_lshr, 564 /* 0x7C */ &&opc_iushr,&&opc_lushr,&&opc_iand,&&opc_land, 565 566 /* 0x80 */ &&opc_ior, &&opc_lor,&&opc_ixor,&&opc_lxor, 567 /* 0x84 */ &&opc_iinc,&&opc_i2l,&&opc_i2f, &&opc_i2d, 568 /* 0x88 */ &&opc_l2i, &&opc_l2f,&&opc_l2d, &&opc_f2i, 569 /* 0x8C */ &&opc_f2l, &&opc_f2d,&&opc_d2i, &&opc_d2l, 570 571 /* 0x90 */ &&opc_d2f, &&opc_i2b, &&opc_i2c, &&opc_i2s, 572 /* 0x94 */ &&opc_lcmp, &&opc_fcmpl,&&opc_fcmpg,&&opc_dcmpl, 573 /* 0x98 */ &&opc_dcmpg,&&opc_ifeq, &&opc_ifne, &&opc_iflt, 574 /* 0x9C */ &&opc_ifge, &&opc_ifgt, &&opc_ifle, &&opc_if_icmpeq, 575 576 /* 0xA0 */ &&opc_if_icmpne,&&opc_if_icmplt,&&opc_if_icmpge, &&opc_if_icmpgt, 577 /* 0xA4 */ &&opc_if_icmple,&&opc_if_acmpeq,&&opc_if_acmpne, &&opc_goto, 578 /* 0xA8 */ &&opc_jsr, &&opc_ret, &&opc_tableswitch,&&opc_lookupswitch, 579 /* 0xAC */ &&opc_ireturn, &&opc_lreturn, &&opc_freturn, &&opc_dreturn, 580 581 /* 0xB0 */ &&opc_areturn, &&opc_return, &&opc_getstatic, &&opc_putstatic, 582 /* 0xB4 */ &&opc_getfield, &&opc_putfield, &&opc_invokevirtual,&&opc_invokespecial, 583 /* 0xB8 */ &&opc_invokestatic,&&opc_invokeinterface,&&opc_invokedynamic,&&opc_new, 584 /* 0xBC */ &&opc_newarray, &&opc_anewarray, &&opc_arraylength, &&opc_athrow, 585 586 /* 0xC0 */ &&opc_checkcast, &&opc_instanceof, &&opc_monitorenter, &&opc_monitorexit, 587 /* 0xC4 */ &&opc_wide, &&opc_multianewarray, &&opc_ifnull, &&opc_ifnonnull, 588 /* 0xC8 */ &&opc_goto_w, &&opc_jsr_w, &&opc_breakpoint, &&opc_default, 589 /* 0xCC */ &&opc_default, &&opc_default, &&opc_default, &&opc_default, 590 591 /* 0xD0 */ &&opc_default, &&opc_default, &&opc_default, &&opc_default, 592 /* 0xD4 */ &&opc_default, &&opc_default, &&opc_default, &&opc_default, 593 /* 0xD8 */ &&opc_default, &&opc_default, &&opc_default, &&opc_default, 594 /* 0xDC */ &&opc_default, &&opc_default, &&opc_default, &&opc_default, 595 596 /* 0xE0 */ &&opc_default, &&opc_default, &&opc_default, &&opc_default, 597 /* 0xE4 */ &&opc_default, &&opc_fast_aldc, &&opc_fast_aldc_w, &&opc_return_register_finalizer, 598 /* 0xE8 */ &&opc_invokehandle,&&opc_default, &&opc_default, &&opc_default, 599 /* 0xEC */ &&opc_default, &&opc_default, &&opc_default, &&opc_default, 600 601 /* 0xF0 */ &&opc_default, &&opc_default, &&opc_default, &&opc_default, 602 /* 0xF4 */ &&opc_default, &&opc_default, &&opc_default, &&opc_default, 603 /* 0xF8 */ &&opc_default, &&opc_default, &&opc_default, &&opc_default, 604 /* 0xFC */ &&opc_default, &&opc_default, &&opc_default, &&opc_default 605 }; 606 register uintptr_t *dispatch_table = (uintptr_t*)&opclabels_data[0]; 607 #endif /* USELABELS */ 608 609 #ifdef ASSERT 610 // this will trigger a VERIFY_OOP on entry 611 if (istate->msg() != initialize && ! METHOD->is_static()) { 612 oop rcvr = LOCALS_OBJECT(0); 613 VERIFY_OOP(rcvr); 614 } 615 #endif 616 // #define HACK 617 #ifdef HACK 618 bool interesting = false; 619 #endif // HACK 620 621 /* QQQ this should be a stack method so we don't know actual direction */ 622 guarantee(istate->msg() == initialize || 623 topOfStack >= istate->stack_limit() && 624 topOfStack < istate->stack_base(), 625 "Stack top out of range"); 626 627 #ifdef CC_INTERP_PROFILE 628 // MethodData's last branch taken count. 629 uint mdo_last_branch_taken_count = 0; 630 #else 631 const uint mdo_last_branch_taken_count = 0; 632 #endif 633 634 switch (istate->msg()) { 635 case initialize: { 636 if (initialized++) ShouldNotReachHere(); // Only one initialize call. 637 _compiling = (UseCompiler || CountCompiledCalls); 638 #ifdef VM_JVMTI 639 _jvmti_interp_events = JvmtiExport::can_post_interpreter_events(); 640 #endif 641 return; 642 } 643 break; 644 case method_entry: { 645 THREAD->set_do_not_unlock(); 646 // count invocations 647 assert(initialized, "Interpreter not initialized"); 648 if (_compiling) { 649 MethodCounters* mcs; 650 GET_METHOD_COUNTERS(mcs); 651 if (ProfileInterpreter) { 652 METHOD->increment_interpreter_invocation_count(THREAD); 653 } 654 mcs->invocation_counter()->increment(); 655 if (mcs->invocation_counter()->reached_InvocationLimit(mcs->backedge_counter())) { 656 CALL_VM((void)InterpreterRuntime::frequency_counter_overflow(THREAD, NULL), handle_exception); 657 // We no longer retry on a counter overflow. 658 } 659 // Get or create profile data. Check for pending (async) exceptions. 660 BI_PROFILE_GET_OR_CREATE_METHOD_DATA(handle_exception); 661 SAFEPOINT; 662 } 663 664 if ((istate->_stack_base - istate->_stack_limit) != istate->method()->max_stack() + 1) { 665 // initialize 666 os::breakpoint(); 667 } 668 669 #ifdef HACK 670 { 671 ResourceMark rm; 672 char *method_name = istate->method()->name_and_sig_as_C_string(); 673 if (strstr(method_name, "runThese$TestRunner.run()V") != NULL) { 674 tty->print_cr("entering: depth %d bci: %d", 675 (istate->_stack_base - istate->_stack), 676 istate->_bcp - istate->_method->code_base()); 677 interesting = true; 678 } 679 } 680 #endif // HACK 681 682 // Lock method if synchronized. 683 if (METHOD->is_synchronized()) { 684 // oop rcvr = locals[0].j.r; 685 oop rcvr; 686 if (METHOD->is_static()) { 687 rcvr = METHOD->constants()->pool_holder()->java_mirror(); 688 } else { 689 rcvr = LOCALS_OBJECT(0); 690 VERIFY_OOP(rcvr); 691 } 692 // The initial monitor is ours for the taking. 693 // Monitor not filled in frame manager any longer as this caused race condition with biased locking. 694 BasicObjectLock* mon = &istate->monitor_base()[-1]; 695 mon->set_obj(rcvr); 696 bool success = false; 697 uintptr_t epoch_mask_in_place = (uintptr_t)markOopDesc::epoch_mask_in_place; 698 markOop mark = rcvr->mark(); 699 intptr_t hash = (intptr_t) markOopDesc::no_hash; 700 // Implies UseBiasedLocking. 701 if (mark->has_bias_pattern()) { 702 uintptr_t thread_ident; 703 uintptr_t anticipated_bias_locking_value; 704 thread_ident = (uintptr_t)istate->thread(); 705 anticipated_bias_locking_value = 706 (((uintptr_t)rcvr->klass()->prototype_header() | thread_ident) ^ (uintptr_t)mark) & 707 ~((uintptr_t) markOopDesc::age_mask_in_place); 708 709 if (anticipated_bias_locking_value == 0) { 710 // Already biased towards this thread, nothing to do. 711 if (PrintBiasedLockingStatistics) { 712 (* BiasedLocking::biased_lock_entry_count_addr())++; 713 } 714 success = true; 715 } else if ((anticipated_bias_locking_value & markOopDesc::biased_lock_mask_in_place) != 0) { 716 // Try to revoke bias. 717 markOop header = rcvr->klass()->prototype_header(); 718 if (hash != markOopDesc::no_hash) { 719 header = header->copy_set_hash(hash); 720 } 721 if (Atomic::cmpxchg_ptr(header, rcvr->mark_addr(), mark) == mark) { 722 if (PrintBiasedLockingStatistics) 723 (*BiasedLocking::revoked_lock_entry_count_addr())++; 724 } 725 } else if ((anticipated_bias_locking_value & epoch_mask_in_place) != 0) { 726 // Try to rebias. 727 markOop new_header = (markOop) ( (intptr_t) rcvr->klass()->prototype_header() | thread_ident); 728 if (hash != markOopDesc::no_hash) { 729 new_header = new_header->copy_set_hash(hash); 730 } 731 if (Atomic::cmpxchg_ptr((void*)new_header, rcvr->mark_addr(), mark) == mark) { 732 if (PrintBiasedLockingStatistics) { 733 (* BiasedLocking::rebiased_lock_entry_count_addr())++; 734 } 735 } else { 736 CALL_VM(InterpreterRuntime::monitorenter(THREAD, mon), handle_exception); 737 } 738 success = true; 739 } else { 740 // Try to bias towards thread in case object is anonymously biased. 741 markOop header = (markOop) ((uintptr_t) mark & 742 ((uintptr_t)markOopDesc::biased_lock_mask_in_place | 743 (uintptr_t)markOopDesc::age_mask_in_place | epoch_mask_in_place)); 744 if (hash != markOopDesc::no_hash) { 745 header = header->copy_set_hash(hash); 746 } 747 markOop new_header = (markOop) ((uintptr_t) header | thread_ident); 748 // Debugging hint. 749 DEBUG_ONLY(mon->lock()->set_displaced_header((markOop) (uintptr_t) 0xdeaddead);) 750 if (Atomic::cmpxchg_ptr((void*)new_header, rcvr->mark_addr(), header) == header) { 751 if (PrintBiasedLockingStatistics) { 752 (* BiasedLocking::anonymously_biased_lock_entry_count_addr())++; 753 } 754 } else { 755 CALL_VM(InterpreterRuntime::monitorenter(THREAD, mon), handle_exception); 756 } 757 success = true; 758 } 759 } 760 761 // Traditional lightweight locking. 762 if (!success) { 763 markOop displaced = rcvr->mark()->set_unlocked(); 764 mon->lock()->set_displaced_header(displaced); 765 bool call_vm = UseHeavyMonitors; 766 if (call_vm || Atomic::cmpxchg_ptr(mon, rcvr->mark_addr(), displaced) != displaced) { 767 // Is it simple recursive case? 768 if (!call_vm && THREAD->is_lock_owned((address) displaced->clear_lock_bits())) { 769 mon->lock()->set_displaced_header(NULL); 770 } else { 771 CALL_VM(InterpreterRuntime::monitorenter(THREAD, mon), handle_exception); 772 } 773 } 774 } 775 } 776 THREAD->clr_do_not_unlock(); 777 778 // Notify jvmti 779 #ifdef VM_JVMTI 780 if (_jvmti_interp_events) { 781 // Whenever JVMTI puts a thread in interp_only_mode, method 782 // entry/exit events are sent for that thread to track stack depth. 783 if (THREAD->is_interp_only_mode()) { 784 CALL_VM(InterpreterRuntime::post_method_entry(THREAD), 785 handle_exception); 786 } 787 } 788 #endif /* VM_JVMTI */ 789 790 goto run; 791 } 792 793 case popping_frame: { 794 // returned from a java call to pop the frame, restart the call 795 // clear the message so we don't confuse ourselves later 796 assert(THREAD->pop_frame_in_process(), "wrong frame pop state"); 797 istate->set_msg(no_request); 798 if (_compiling) { 799 // Set MDX back to the ProfileData of the invoke bytecode that will be 800 // restarted. 801 SET_MDX(NULL); 802 BI_PROFILE_GET_OR_CREATE_METHOD_DATA(handle_exception); 803 } 804 THREAD->clr_pop_frame_in_process(); 805 goto run; 806 } 807 808 case method_resume: { 809 if ((istate->_stack_base - istate->_stack_limit) != istate->method()->max_stack() + 1) { 810 // resume 811 os::breakpoint(); 812 } 813 #ifdef HACK 814 { 815 ResourceMark rm; 816 char *method_name = istate->method()->name_and_sig_as_C_string(); 817 if (strstr(method_name, "runThese$TestRunner.run()V") != NULL) { 818 tty->print_cr("resume: depth %d bci: %d", 819 (istate->_stack_base - istate->_stack) , 820 istate->_bcp - istate->_method->code_base()); 821 interesting = true; 822 } 823 } 824 #endif // HACK 825 // returned from a java call, continue executing. 826 if (THREAD->pop_frame_pending() && !THREAD->pop_frame_in_process()) { 827 goto handle_Pop_Frame; 828 } 829 if (THREAD->jvmti_thread_state() && 830 THREAD->jvmti_thread_state()->is_earlyret_pending()) { 831 goto handle_Early_Return; 832 } 833 834 if (THREAD->has_pending_exception()) goto handle_exception; 835 // Update the pc by the saved amount of the invoke bytecode size 836 UPDATE_PC(istate->bcp_advance()); 837 838 if (_compiling) { 839 // Get or create profile data. Check for pending (async) exceptions. 840 BI_PROFILE_GET_OR_CREATE_METHOD_DATA(handle_exception); 841 } 842 goto run; 843 } 844 845 case deopt_resume2: { 846 // Returned from an opcode that will reexecute. Deopt was 847 // a result of a PopFrame request. 848 // 849 850 if (_compiling) { 851 // Get or create profile data. Check for pending (async) exceptions. 852 BI_PROFILE_GET_OR_CREATE_METHOD_DATA(handle_exception); 853 } 854 goto run; 855 } 856 857 case deopt_resume: { 858 // Returned from an opcode that has completed. The stack has 859 // the result all we need to do is skip across the bytecode 860 // and continue (assuming there is no exception pending) 861 // 862 // compute continuation length 863 // 864 // Note: it is possible to deopt at a return_register_finalizer opcode 865 // because this requires entering the vm to do the registering. While the 866 // opcode is complete we can't advance because there are no more opcodes 867 // much like trying to deopt at a poll return. In that has we simply 868 // get out of here 869 // 870 if ( Bytecodes::code_at(METHOD, pc) == Bytecodes::_return_register_finalizer) { 871 // this will do the right thing even if an exception is pending. 872 goto handle_return; 873 } 874 UPDATE_PC(Bytecodes::length_at(METHOD, pc)); 875 if (THREAD->has_pending_exception()) goto handle_exception; 876 877 if (_compiling) { 878 // Get or create profile data. Check for pending (async) exceptions. 879 BI_PROFILE_GET_OR_CREATE_METHOD_DATA(handle_exception); 880 } 881 goto run; 882 } 883 case got_monitors: { 884 // continue locking now that we have a monitor to use 885 // we expect to find newly allocated monitor at the "top" of the monitor stack. 886 oop lockee = STACK_OBJECT(-1); 887 VERIFY_OOP(lockee); 888 // derefing's lockee ought to provoke implicit null check 889 // find a free monitor 890 BasicObjectLock* entry = (BasicObjectLock*) istate->stack_base(); 891 assert(entry->obj() == NULL, "Frame manager didn't allocate the monitor"); 892 entry->set_obj(lockee); 893 bool success = false; 894 uintptr_t epoch_mask_in_place = (uintptr_t)markOopDesc::epoch_mask_in_place; 895 896 markOop mark = lockee->mark(); 897 intptr_t hash = (intptr_t) markOopDesc::no_hash; 898 // implies UseBiasedLocking 899 if (mark->has_bias_pattern()) { 900 uintptr_t thread_ident; 901 uintptr_t anticipated_bias_locking_value; 902 thread_ident = (uintptr_t)istate->thread(); 903 anticipated_bias_locking_value = 904 (((uintptr_t)lockee->klass()->prototype_header() | thread_ident) ^ (uintptr_t)mark) & 905 ~((uintptr_t) markOopDesc::age_mask_in_place); 906 907 if (anticipated_bias_locking_value == 0) { 908 // already biased towards this thread, nothing to do 909 if (PrintBiasedLockingStatistics) { 910 (* BiasedLocking::biased_lock_entry_count_addr())++; 911 } 912 success = true; 913 } else if ((anticipated_bias_locking_value & markOopDesc::biased_lock_mask_in_place) != 0) { 914 // try revoke bias 915 markOop header = lockee->klass()->prototype_header(); 916 if (hash != markOopDesc::no_hash) { 917 header = header->copy_set_hash(hash); 918 } 919 if (Atomic::cmpxchg_ptr(header, lockee->mark_addr(), mark) == mark) { 920 if (PrintBiasedLockingStatistics) { 921 (*BiasedLocking::revoked_lock_entry_count_addr())++; 922 } 923 } 924 } else if ((anticipated_bias_locking_value & epoch_mask_in_place) !=0) { 925 // try rebias 926 markOop new_header = (markOop) ( (intptr_t) lockee->klass()->prototype_header() | thread_ident); 927 if (hash != markOopDesc::no_hash) { 928 new_header = new_header->copy_set_hash(hash); 929 } 930 if (Atomic::cmpxchg_ptr((void*)new_header, lockee->mark_addr(), mark) == mark) { 931 if (PrintBiasedLockingStatistics) { 932 (* BiasedLocking::rebiased_lock_entry_count_addr())++; 933 } 934 } else { 935 CALL_VM(InterpreterRuntime::monitorenter(THREAD, entry), handle_exception); 936 } 937 success = true; 938 } else { 939 // try to bias towards thread in case object is anonymously biased 940 markOop header = (markOop) ((uintptr_t) mark & ((uintptr_t)markOopDesc::biased_lock_mask_in_place | 941 (uintptr_t)markOopDesc::age_mask_in_place | epoch_mask_in_place)); 942 if (hash != markOopDesc::no_hash) { 943 header = header->copy_set_hash(hash); 944 } 945 markOop new_header = (markOop) ((uintptr_t) header | thread_ident); 946 // debugging hint 947 DEBUG_ONLY(entry->lock()->set_displaced_header((markOop) (uintptr_t) 0xdeaddead);) 948 if (Atomic::cmpxchg_ptr((void*)new_header, lockee->mark_addr(), header) == header) { 949 if (PrintBiasedLockingStatistics) { 950 (* BiasedLocking::anonymously_biased_lock_entry_count_addr())++; 951 } 952 } else { 953 CALL_VM(InterpreterRuntime::monitorenter(THREAD, entry), handle_exception); 954 } 955 success = true; 956 } 957 } 958 959 // traditional lightweight locking 960 if (!success) { 961 markOop displaced = lockee->mark()->set_unlocked(); 962 entry->lock()->set_displaced_header(displaced); 963 bool call_vm = UseHeavyMonitors; 964 if (call_vm || Atomic::cmpxchg_ptr(entry, lockee->mark_addr(), displaced) != displaced) { 965 // Is it simple recursive case? 966 if (!call_vm && THREAD->is_lock_owned((address) displaced->clear_lock_bits())) { 967 entry->lock()->set_displaced_header(NULL); 968 } else { 969 CALL_VM(InterpreterRuntime::monitorenter(THREAD, entry), handle_exception); 970 } 971 } 972 } 973 UPDATE_PC_AND_TOS(1, -1); 974 goto run; 975 } 976 default: { 977 fatal("Unexpected message from frame manager"); 978 } 979 } 980 981 run: 982 983 DO_UPDATE_INSTRUCTION_COUNT(*pc) 984 DEBUGGER_SINGLE_STEP_NOTIFY(); 985 #ifdef PREFETCH_OPCCODE 986 opcode = *pc; /* prefetch first opcode */ 987 #endif 988 989 #ifndef USELABELS 990 while (1) 991 #endif 992 { 993 #ifndef PREFETCH_OPCCODE 994 opcode = *pc; 995 #endif 996 // Seems like this happens twice per opcode. At worst this is only 997 // need at entry to the loop. 998 // DEBUGGER_SINGLE_STEP_NOTIFY(); 999 /* Using this labels avoids double breakpoints when quickening and 1000 * when returing from transition frames. 1001 */ 1002 opcode_switch: 1003 assert(istate == orig, "Corrupted istate"); 1004 /* QQQ Hmm this has knowledge of direction, ought to be a stack method */ 1005 assert(topOfStack >= istate->stack_limit(), "Stack overrun"); 1006 assert(topOfStack < istate->stack_base(), "Stack underrun"); 1007 1008 #ifdef USELABELS 1009 DISPATCH(opcode); 1010 #else 1011 switch (opcode) 1012 #endif 1013 { 1014 CASE(_nop): 1015 UPDATE_PC_AND_CONTINUE(1); 1016 1017 /* Push miscellaneous constants onto the stack. */ 1018 1019 CASE(_aconst_null): 1020 SET_STACK_OBJECT(NULL, 0); 1021 UPDATE_PC_AND_TOS_AND_CONTINUE(1, 1); 1022 1023 #undef OPC_CONST_n 1024 #define OPC_CONST_n(opcode, const_type, value) \ 1025 CASE(opcode): \ 1026 SET_STACK_ ## const_type(value, 0); \ 1027 UPDATE_PC_AND_TOS_AND_CONTINUE(1, 1); 1028 1029 OPC_CONST_n(_iconst_m1, INT, -1); 1030 OPC_CONST_n(_iconst_0, INT, 0); 1031 OPC_CONST_n(_iconst_1, INT, 1); 1032 OPC_CONST_n(_iconst_2, INT, 2); 1033 OPC_CONST_n(_iconst_3, INT, 3); 1034 OPC_CONST_n(_iconst_4, INT, 4); 1035 OPC_CONST_n(_iconst_5, INT, 5); 1036 OPC_CONST_n(_fconst_0, FLOAT, 0.0); 1037 OPC_CONST_n(_fconst_1, FLOAT, 1.0); 1038 OPC_CONST_n(_fconst_2, FLOAT, 2.0); 1039 1040 #undef OPC_CONST2_n 1041 #define OPC_CONST2_n(opcname, value, key, kind) \ 1042 CASE(_##opcname): \ 1043 { \ 1044 SET_STACK_ ## kind(VM##key##Const##value(), 1); \ 1045 UPDATE_PC_AND_TOS_AND_CONTINUE(1, 2); \ 1046 } 1047 OPC_CONST2_n(dconst_0, Zero, double, DOUBLE); 1048 OPC_CONST2_n(dconst_1, One, double, DOUBLE); 1049 OPC_CONST2_n(lconst_0, Zero, long, LONG); 1050 OPC_CONST2_n(lconst_1, One, long, LONG); 1051 1052 /* Load constant from constant pool: */ 1053 1054 /* Push a 1-byte signed integer value onto the stack. */ 1055 CASE(_bipush): 1056 SET_STACK_INT((jbyte)(pc[1]), 0); 1057 UPDATE_PC_AND_TOS_AND_CONTINUE(2, 1); 1058 1059 /* Push a 2-byte signed integer constant onto the stack. */ 1060 CASE(_sipush): 1061 SET_STACK_INT((int16_t)Bytes::get_Java_u2(pc + 1), 0); 1062 UPDATE_PC_AND_TOS_AND_CONTINUE(3, 1); 1063 1064 /* load from local variable */ 1065 1066 CASE(_aload): 1067 VERIFY_OOP(LOCALS_OBJECT(pc[1])); 1068 SET_STACK_OBJECT(LOCALS_OBJECT(pc[1]), 0); 1069 UPDATE_PC_AND_TOS_AND_CONTINUE(2, 1); 1070 1071 CASE(_iload): 1072 CASE(_fload): 1073 SET_STACK_SLOT(LOCALS_SLOT(pc[1]), 0); 1074 UPDATE_PC_AND_TOS_AND_CONTINUE(2, 1); 1075 1076 CASE(_lload): 1077 SET_STACK_LONG_FROM_ADDR(LOCALS_LONG_AT(pc[1]), 1); 1078 UPDATE_PC_AND_TOS_AND_CONTINUE(2, 2); 1079 1080 CASE(_dload): 1081 SET_STACK_DOUBLE_FROM_ADDR(LOCALS_DOUBLE_AT(pc[1]), 1); 1082 UPDATE_PC_AND_TOS_AND_CONTINUE(2, 2); 1083 1084 #undef OPC_LOAD_n 1085 #define OPC_LOAD_n(num) \ 1086 CASE(_aload_##num): \ 1087 VERIFY_OOP(LOCALS_OBJECT(num)); \ 1088 SET_STACK_OBJECT(LOCALS_OBJECT(num), 0); \ 1089 UPDATE_PC_AND_TOS_AND_CONTINUE(1, 1); \ 1090 \ 1091 CASE(_iload_##num): \ 1092 CASE(_fload_##num): \ 1093 SET_STACK_SLOT(LOCALS_SLOT(num), 0); \ 1094 UPDATE_PC_AND_TOS_AND_CONTINUE(1, 1); \ 1095 \ 1096 CASE(_lload_##num): \ 1097 SET_STACK_LONG_FROM_ADDR(LOCALS_LONG_AT(num), 1); \ 1098 UPDATE_PC_AND_TOS_AND_CONTINUE(1, 2); \ 1099 CASE(_dload_##num): \ 1100 SET_STACK_DOUBLE_FROM_ADDR(LOCALS_DOUBLE_AT(num), 1); \ 1101 UPDATE_PC_AND_TOS_AND_CONTINUE(1, 2); 1102 1103 OPC_LOAD_n(0); 1104 OPC_LOAD_n(1); 1105 OPC_LOAD_n(2); 1106 OPC_LOAD_n(3); 1107 1108 /* store to a local variable */ 1109 1110 CASE(_astore): 1111 astore(topOfStack, -1, locals, pc[1]); 1112 UPDATE_PC_AND_TOS_AND_CONTINUE(2, -1); 1113 1114 CASE(_istore): 1115 CASE(_fstore): 1116 SET_LOCALS_SLOT(STACK_SLOT(-1), pc[1]); 1117 UPDATE_PC_AND_TOS_AND_CONTINUE(2, -1); 1118 1119 CASE(_lstore): 1120 SET_LOCALS_LONG(STACK_LONG(-1), pc[1]); 1121 UPDATE_PC_AND_TOS_AND_CONTINUE(2, -2); 1122 1123 CASE(_dstore): 1124 SET_LOCALS_DOUBLE(STACK_DOUBLE(-1), pc[1]); 1125 UPDATE_PC_AND_TOS_AND_CONTINUE(2, -2); 1126 1127 CASE(_wide): { 1128 uint16_t reg = Bytes::get_Java_u2(pc + 2); 1129 1130 opcode = pc[1]; 1131 1132 // Wide and it's sub-bytecode are counted as separate instructions. If we 1133 // don't account for this here, the bytecode trace skips the next bytecode. 1134 DO_UPDATE_INSTRUCTION_COUNT(opcode); 1135 1136 switch(opcode) { 1137 case Bytecodes::_aload: 1138 VERIFY_OOP(LOCALS_OBJECT(reg)); 1139 SET_STACK_OBJECT(LOCALS_OBJECT(reg), 0); 1140 UPDATE_PC_AND_TOS_AND_CONTINUE(4, 1); 1141 1142 case Bytecodes::_iload: 1143 case Bytecodes::_fload: 1144 SET_STACK_SLOT(LOCALS_SLOT(reg), 0); 1145 UPDATE_PC_AND_TOS_AND_CONTINUE(4, 1); 1146 1147 case Bytecodes::_lload: 1148 SET_STACK_LONG_FROM_ADDR(LOCALS_LONG_AT(reg), 1); 1149 UPDATE_PC_AND_TOS_AND_CONTINUE(4, 2); 1150 1151 case Bytecodes::_dload: 1152 SET_STACK_DOUBLE_FROM_ADDR(LOCALS_LONG_AT(reg), 1); 1153 UPDATE_PC_AND_TOS_AND_CONTINUE(4, 2); 1154 1155 case Bytecodes::_astore: 1156 astore(topOfStack, -1, locals, reg); 1157 UPDATE_PC_AND_TOS_AND_CONTINUE(4, -1); 1158 1159 case Bytecodes::_istore: 1160 case Bytecodes::_fstore: 1161 SET_LOCALS_SLOT(STACK_SLOT(-1), reg); 1162 UPDATE_PC_AND_TOS_AND_CONTINUE(4, -1); 1163 1164 case Bytecodes::_lstore: 1165 SET_LOCALS_LONG(STACK_LONG(-1), reg); 1166 UPDATE_PC_AND_TOS_AND_CONTINUE(4, -2); 1167 1168 case Bytecodes::_dstore: 1169 SET_LOCALS_DOUBLE(STACK_DOUBLE(-1), reg); 1170 UPDATE_PC_AND_TOS_AND_CONTINUE(4, -2); 1171 1172 case Bytecodes::_iinc: { 1173 int16_t offset = (int16_t)Bytes::get_Java_u2(pc+4); 1174 // Be nice to see what this generates.... QQQ 1175 SET_LOCALS_INT(LOCALS_INT(reg) + offset, reg); 1176 UPDATE_PC_AND_CONTINUE(6); 1177 } 1178 case Bytecodes::_ret: 1179 // Profile ret. 1180 BI_PROFILE_UPDATE_RET(/*bci=*/((int)(intptr_t)(LOCALS_ADDR(reg)))); 1181 // Now, update the pc. 1182 pc = istate->method()->code_base() + (intptr_t)(LOCALS_ADDR(reg)); 1183 UPDATE_PC_AND_CONTINUE(0); 1184 default: 1185 VM_JAVA_ERROR(vmSymbols::java_lang_InternalError(), "undefined opcode", note_no_trap); 1186 } 1187 } 1188 1189 1190 #undef OPC_STORE_n 1191 #define OPC_STORE_n(num) \ 1192 CASE(_astore_##num): \ 1193 astore(topOfStack, -1, locals, num); \ 1194 UPDATE_PC_AND_TOS_AND_CONTINUE(1, -1); \ 1195 CASE(_istore_##num): \ 1196 CASE(_fstore_##num): \ 1197 SET_LOCALS_SLOT(STACK_SLOT(-1), num); \ 1198 UPDATE_PC_AND_TOS_AND_CONTINUE(1, -1); 1199 1200 OPC_STORE_n(0); 1201 OPC_STORE_n(1); 1202 OPC_STORE_n(2); 1203 OPC_STORE_n(3); 1204 1205 #undef OPC_DSTORE_n 1206 #define OPC_DSTORE_n(num) \ 1207 CASE(_dstore_##num): \ 1208 SET_LOCALS_DOUBLE(STACK_DOUBLE(-1), num); \ 1209 UPDATE_PC_AND_TOS_AND_CONTINUE(1, -2); \ 1210 CASE(_lstore_##num): \ 1211 SET_LOCALS_LONG(STACK_LONG(-1), num); \ 1212 UPDATE_PC_AND_TOS_AND_CONTINUE(1, -2); 1213 1214 OPC_DSTORE_n(0); 1215 OPC_DSTORE_n(1); 1216 OPC_DSTORE_n(2); 1217 OPC_DSTORE_n(3); 1218 1219 /* stack pop, dup, and insert opcodes */ 1220 1221 1222 CASE(_pop): /* Discard the top item on the stack */ 1223 UPDATE_PC_AND_TOS_AND_CONTINUE(1, -1); 1224 1225 1226 CASE(_pop2): /* Discard the top 2 items on the stack */ 1227 UPDATE_PC_AND_TOS_AND_CONTINUE(1, -2); 1228 1229 1230 CASE(_dup): /* Duplicate the top item on the stack */ 1231 dup(topOfStack); 1232 UPDATE_PC_AND_TOS_AND_CONTINUE(1, 1); 1233 1234 CASE(_dup2): /* Duplicate the top 2 items on the stack */ 1235 dup2(topOfStack); 1236 UPDATE_PC_AND_TOS_AND_CONTINUE(1, 2); 1237 1238 CASE(_dup_x1): /* insert top word two down */ 1239 dup_x1(topOfStack); 1240 UPDATE_PC_AND_TOS_AND_CONTINUE(1, 1); 1241 1242 CASE(_dup_x2): /* insert top word three down */ 1243 dup_x2(topOfStack); 1244 UPDATE_PC_AND_TOS_AND_CONTINUE(1, 1); 1245 1246 CASE(_dup2_x1): /* insert top 2 slots three down */ 1247 dup2_x1(topOfStack); 1248 UPDATE_PC_AND_TOS_AND_CONTINUE(1, 2); 1249 1250 CASE(_dup2_x2): /* insert top 2 slots four down */ 1251 dup2_x2(topOfStack); 1252 UPDATE_PC_AND_TOS_AND_CONTINUE(1, 2); 1253 1254 CASE(_swap): { /* swap top two elements on the stack */ 1255 swap(topOfStack); 1256 UPDATE_PC_AND_CONTINUE(1); 1257 } 1258 1259 /* Perform various binary integer operations */ 1260 1261 #undef OPC_INT_BINARY 1262 #define OPC_INT_BINARY(opcname, opname, test) \ 1263 CASE(_i##opcname): \ 1264 if (test && (STACK_INT(-1) == 0)) { \ 1265 VM_JAVA_ERROR(vmSymbols::java_lang_ArithmeticException(), \ 1266 "/ by zero", note_div0Check_trap); \ 1267 } \ 1268 SET_STACK_INT(VMint##opname(STACK_INT(-2), \ 1269 STACK_INT(-1)), \ 1270 -2); \ 1271 UPDATE_PC_AND_TOS_AND_CONTINUE(1, -1); \ 1272 CASE(_l##opcname): \ 1273 { \ 1274 if (test) { \ 1275 jlong l1 = STACK_LONG(-1); \ 1276 if (VMlongEqz(l1)) { \ 1277 VM_JAVA_ERROR(vmSymbols::java_lang_ArithmeticException(), \ 1278 "/ by long zero", note_div0Check_trap); \ 1279 } \ 1280 } \ 1281 /* First long at (-1,-2) next long at (-3,-4) */ \ 1282 SET_STACK_LONG(VMlong##opname(STACK_LONG(-3), \ 1283 STACK_LONG(-1)), \ 1284 -3); \ 1285 UPDATE_PC_AND_TOS_AND_CONTINUE(1, -2); \ 1286 } 1287 1288 OPC_INT_BINARY(add, Add, 0); 1289 OPC_INT_BINARY(sub, Sub, 0); 1290 OPC_INT_BINARY(mul, Mul, 0); 1291 OPC_INT_BINARY(and, And, 0); 1292 OPC_INT_BINARY(or, Or, 0); 1293 OPC_INT_BINARY(xor, Xor, 0); 1294 OPC_INT_BINARY(div, Div, 1); 1295 OPC_INT_BINARY(rem, Rem, 1); 1296 1297 1298 /* Perform various binary floating number operations */ 1299 /* On some machine/platforms/compilers div zero check can be implicit */ 1300 1301 #undef OPC_FLOAT_BINARY 1302 #define OPC_FLOAT_BINARY(opcname, opname) \ 1303 CASE(_d##opcname): { \ 1304 SET_STACK_DOUBLE(VMdouble##opname(STACK_DOUBLE(-3), \ 1305 STACK_DOUBLE(-1)), \ 1306 -3); \ 1307 UPDATE_PC_AND_TOS_AND_CONTINUE(1, -2); \ 1308 } \ 1309 CASE(_f##opcname): \ 1310 SET_STACK_FLOAT(VMfloat##opname(STACK_FLOAT(-2), \ 1311 STACK_FLOAT(-1)), \ 1312 -2); \ 1313 UPDATE_PC_AND_TOS_AND_CONTINUE(1, -1); 1314 1315 1316 OPC_FLOAT_BINARY(add, Add); 1317 OPC_FLOAT_BINARY(sub, Sub); 1318 OPC_FLOAT_BINARY(mul, Mul); 1319 OPC_FLOAT_BINARY(div, Div); 1320 OPC_FLOAT_BINARY(rem, Rem); 1321 1322 /* Shift operations 1323 * Shift left int and long: ishl, lshl 1324 * Logical shift right int and long w/zero extension: iushr, lushr 1325 * Arithmetic shift right int and long w/sign extension: ishr, lshr 1326 */ 1327 1328 #undef OPC_SHIFT_BINARY 1329 #define OPC_SHIFT_BINARY(opcname, opname) \ 1330 CASE(_i##opcname): \ 1331 SET_STACK_INT(VMint##opname(STACK_INT(-2), \ 1332 STACK_INT(-1)), \ 1333 -2); \ 1334 UPDATE_PC_AND_TOS_AND_CONTINUE(1, -1); \ 1335 CASE(_l##opcname): \ 1336 { \ 1337 SET_STACK_LONG(VMlong##opname(STACK_LONG(-2), \ 1338 STACK_INT(-1)), \ 1339 -2); \ 1340 UPDATE_PC_AND_TOS_AND_CONTINUE(1, -1); \ 1341 } 1342 1343 OPC_SHIFT_BINARY(shl, Shl); 1344 OPC_SHIFT_BINARY(shr, Shr); 1345 OPC_SHIFT_BINARY(ushr, Ushr); 1346 1347 /* Increment local variable by constant */ 1348 CASE(_iinc): 1349 { 1350 // locals[pc[1]].j.i += (jbyte)(pc[2]); 1351 SET_LOCALS_INT(LOCALS_INT(pc[1]) + (jbyte)(pc[2]), pc[1]); 1352 UPDATE_PC_AND_CONTINUE(3); 1353 } 1354 1355 /* negate the value on the top of the stack */ 1356 1357 CASE(_ineg): 1358 SET_STACK_INT(VMintNeg(STACK_INT(-1)), -1); 1359 UPDATE_PC_AND_CONTINUE(1); 1360 1361 CASE(_fneg): 1362 SET_STACK_FLOAT(VMfloatNeg(STACK_FLOAT(-1)), -1); 1363 UPDATE_PC_AND_CONTINUE(1); 1364 1365 CASE(_lneg): 1366 { 1367 SET_STACK_LONG(VMlongNeg(STACK_LONG(-1)), -1); 1368 UPDATE_PC_AND_CONTINUE(1); 1369 } 1370 1371 CASE(_dneg): 1372 { 1373 SET_STACK_DOUBLE(VMdoubleNeg(STACK_DOUBLE(-1)), -1); 1374 UPDATE_PC_AND_CONTINUE(1); 1375 } 1376 1377 /* Conversion operations */ 1378 1379 CASE(_i2f): /* convert top of stack int to float */ 1380 SET_STACK_FLOAT(VMint2Float(STACK_INT(-1)), -1); 1381 UPDATE_PC_AND_CONTINUE(1); 1382 1383 CASE(_i2l): /* convert top of stack int to long */ 1384 { 1385 // this is ugly QQQ 1386 jlong r = VMint2Long(STACK_INT(-1)); 1387 MORE_STACK(-1); // Pop 1388 SET_STACK_LONG(r, 1); 1389 1390 UPDATE_PC_AND_TOS_AND_CONTINUE(1, 2); 1391 } 1392 1393 CASE(_i2d): /* convert top of stack int to double */ 1394 { 1395 // this is ugly QQQ (why cast to jlong?? ) 1396 jdouble r = (jlong)STACK_INT(-1); 1397 MORE_STACK(-1); // Pop 1398 SET_STACK_DOUBLE(r, 1); 1399 1400 UPDATE_PC_AND_TOS_AND_CONTINUE(1, 2); 1401 } 1402 1403 CASE(_l2i): /* convert top of stack long to int */ 1404 { 1405 jint r = VMlong2Int(STACK_LONG(-1)); 1406 MORE_STACK(-2); // Pop 1407 SET_STACK_INT(r, 0); 1408 UPDATE_PC_AND_TOS_AND_CONTINUE(1, 1); 1409 } 1410 1411 CASE(_l2f): /* convert top of stack long to float */ 1412 { 1413 jlong r = STACK_LONG(-1); 1414 MORE_STACK(-2); // Pop 1415 SET_STACK_FLOAT(VMlong2Float(r), 0); 1416 UPDATE_PC_AND_TOS_AND_CONTINUE(1, 1); 1417 } 1418 1419 CASE(_l2d): /* convert top of stack long to double */ 1420 { 1421 jlong r = STACK_LONG(-1); 1422 MORE_STACK(-2); // Pop 1423 SET_STACK_DOUBLE(VMlong2Double(r), 1); 1424 UPDATE_PC_AND_TOS_AND_CONTINUE(1, 2); 1425 } 1426 1427 CASE(_f2i): /* Convert top of stack float to int */ 1428 SET_STACK_INT(SharedRuntime::f2i(STACK_FLOAT(-1)), -1); 1429 UPDATE_PC_AND_CONTINUE(1); 1430 1431 CASE(_f2l): /* convert top of stack float to long */ 1432 { 1433 jlong r = SharedRuntime::f2l(STACK_FLOAT(-1)); 1434 MORE_STACK(-1); // POP 1435 SET_STACK_LONG(r, 1); 1436 UPDATE_PC_AND_TOS_AND_CONTINUE(1, 2); 1437 } 1438 1439 CASE(_f2d): /* convert top of stack float to double */ 1440 { 1441 jfloat f; 1442 jdouble r; 1443 f = STACK_FLOAT(-1); 1444 r = (jdouble) f; 1445 MORE_STACK(-1); // POP 1446 SET_STACK_DOUBLE(r, 1); 1447 UPDATE_PC_AND_TOS_AND_CONTINUE(1, 2); 1448 } 1449 1450 CASE(_d2i): /* convert top of stack double to int */ 1451 { 1452 jint r1 = SharedRuntime::d2i(STACK_DOUBLE(-1)); 1453 MORE_STACK(-2); 1454 SET_STACK_INT(r1, 0); 1455 UPDATE_PC_AND_TOS_AND_CONTINUE(1, 1); 1456 } 1457 1458 CASE(_d2f): /* convert top of stack double to float */ 1459 { 1460 jfloat r1 = VMdouble2Float(STACK_DOUBLE(-1)); 1461 MORE_STACK(-2); 1462 SET_STACK_FLOAT(r1, 0); 1463 UPDATE_PC_AND_TOS_AND_CONTINUE(1, 1); 1464 } 1465 1466 CASE(_d2l): /* convert top of stack double to long */ 1467 { 1468 jlong r1 = SharedRuntime::d2l(STACK_DOUBLE(-1)); 1469 MORE_STACK(-2); 1470 SET_STACK_LONG(r1, 1); 1471 UPDATE_PC_AND_TOS_AND_CONTINUE(1, 2); 1472 } 1473 1474 CASE(_i2b): 1475 SET_STACK_INT(VMint2Byte(STACK_INT(-1)), -1); 1476 UPDATE_PC_AND_CONTINUE(1); 1477 1478 CASE(_i2c): 1479 SET_STACK_INT(VMint2Char(STACK_INT(-1)), -1); 1480 UPDATE_PC_AND_CONTINUE(1); 1481 1482 CASE(_i2s): 1483 SET_STACK_INT(VMint2Short(STACK_INT(-1)), -1); 1484 UPDATE_PC_AND_CONTINUE(1); 1485 1486 /* comparison operators */ 1487 1488 1489 #define COMPARISON_OP(name, comparison) \ 1490 CASE(_if_icmp##name): { \ 1491 const bool cmp = (STACK_INT(-2) comparison STACK_INT(-1)); \ 1492 int skip = cmp \ 1493 ? (int16_t)Bytes::get_Java_u2(pc + 1) : 3; \ 1494 address branch_pc = pc; \ 1495 /* Profile branch. */ \ 1496 BI_PROFILE_UPDATE_BRANCH(/*is_taken=*/cmp); \ 1497 UPDATE_PC_AND_TOS(skip, -2); \ 1498 DO_BACKEDGE_CHECKS(skip, branch_pc); \ 1499 CONTINUE; \ 1500 } \ 1501 CASE(_if##name): { \ 1502 const bool cmp = (STACK_INT(-1) comparison 0); \ 1503 int skip = cmp \ 1504 ? (int16_t)Bytes::get_Java_u2(pc + 1) : 3; \ 1505 address branch_pc = pc; \ 1506 /* Profile branch. */ \ 1507 BI_PROFILE_UPDATE_BRANCH(/*is_taken=*/cmp); \ 1508 UPDATE_PC_AND_TOS(skip, -1); \ 1509 DO_BACKEDGE_CHECKS(skip, branch_pc); \ 1510 CONTINUE; \ 1511 } 1512 1513 #define COMPARISON_OP2(name, comparison) \ 1514 COMPARISON_OP(name, comparison) \ 1515 CASE(_if_acmp##name): { \ 1516 const bool cmp = (STACK_OBJECT(-2) comparison STACK_OBJECT(-1)); \ 1517 int skip = cmp \ 1518 ? (int16_t)Bytes::get_Java_u2(pc + 1) : 3; \ 1519 address branch_pc = pc; \ 1520 /* Profile branch. */ \ 1521 BI_PROFILE_UPDATE_BRANCH(/*is_taken=*/cmp); \ 1522 UPDATE_PC_AND_TOS(skip, -2); \ 1523 DO_BACKEDGE_CHECKS(skip, branch_pc); \ 1524 CONTINUE; \ 1525 } 1526 1527 #define NULL_COMPARISON_NOT_OP(name) \ 1528 CASE(_if##name): { \ 1529 const bool cmp = (!(STACK_OBJECT(-1) == NULL)); \ 1530 int skip = cmp \ 1531 ? (int16_t)Bytes::get_Java_u2(pc + 1) : 3; \ 1532 address branch_pc = pc; \ 1533 /* Profile branch. */ \ 1534 BI_PROFILE_UPDATE_BRANCH(/*is_taken=*/cmp); \ 1535 UPDATE_PC_AND_TOS(skip, -1); \ 1536 DO_BACKEDGE_CHECKS(skip, branch_pc); \ 1537 CONTINUE; \ 1538 } 1539 1540 #define NULL_COMPARISON_OP(name) \ 1541 CASE(_if##name): { \ 1542 const bool cmp = ((STACK_OBJECT(-1) == NULL)); \ 1543 int skip = cmp \ 1544 ? (int16_t)Bytes::get_Java_u2(pc + 1) : 3; \ 1545 address branch_pc = pc; \ 1546 /* Profile branch. */ \ 1547 BI_PROFILE_UPDATE_BRANCH(/*is_taken=*/cmp); \ 1548 UPDATE_PC_AND_TOS(skip, -1); \ 1549 DO_BACKEDGE_CHECKS(skip, branch_pc); \ 1550 CONTINUE; \ 1551 } 1552 COMPARISON_OP(lt, <); 1553 COMPARISON_OP(gt, >); 1554 COMPARISON_OP(le, <=); 1555 COMPARISON_OP(ge, >=); 1556 COMPARISON_OP2(eq, ==); /* include ref comparison */ 1557 COMPARISON_OP2(ne, !=); /* include ref comparison */ 1558 NULL_COMPARISON_OP(null); 1559 NULL_COMPARISON_NOT_OP(nonnull); 1560 1561 /* Goto pc at specified offset in switch table. */ 1562 1563 CASE(_tableswitch): { 1564 jint* lpc = (jint*)VMalignWordUp(pc+1); 1565 int32_t key = STACK_INT(-1); 1566 int32_t low = Bytes::get_Java_u4((address)&lpc[1]); 1567 int32_t high = Bytes::get_Java_u4((address)&lpc[2]); 1568 int32_t skip; 1569 key -= low; 1570 if (((uint32_t) key > (uint32_t)(high - low))) { 1571 key = -1; 1572 skip = Bytes::get_Java_u4((address)&lpc[0]); 1573 } else { 1574 skip = Bytes::get_Java_u4((address)&lpc[key + 3]); 1575 } 1576 // Profile switch. 1577 BI_PROFILE_UPDATE_SWITCH(/*switch_index=*/key); 1578 // Does this really need a full backedge check (osr)? 1579 address branch_pc = pc; 1580 UPDATE_PC_AND_TOS(skip, -1); 1581 DO_BACKEDGE_CHECKS(skip, branch_pc); 1582 CONTINUE; 1583 } 1584 1585 /* Goto pc whose table entry matches specified key. */ 1586 1587 CASE(_lookupswitch): { 1588 jint* lpc = (jint*)VMalignWordUp(pc+1); 1589 int32_t key = STACK_INT(-1); 1590 int32_t skip = Bytes::get_Java_u4((address) lpc); /* default amount */ 1591 // Remember index. 1592 int index = -1; 1593 int newindex = 0; 1594 int32_t npairs = Bytes::get_Java_u4((address) &lpc[1]); 1595 while (--npairs >= 0) { 1596 lpc += 2; 1597 if (key == (int32_t)Bytes::get_Java_u4((address)lpc)) { 1598 skip = Bytes::get_Java_u4((address)&lpc[1]); 1599 index = newindex; 1600 break; 1601 } 1602 newindex += 1; 1603 } 1604 // Profile switch. 1605 BI_PROFILE_UPDATE_SWITCH(/*switch_index=*/index); 1606 address branch_pc = pc; 1607 UPDATE_PC_AND_TOS(skip, -1); 1608 DO_BACKEDGE_CHECKS(skip, branch_pc); 1609 CONTINUE; 1610 } 1611 1612 CASE(_fcmpl): 1613 CASE(_fcmpg): 1614 { 1615 SET_STACK_INT(VMfloatCompare(STACK_FLOAT(-2), 1616 STACK_FLOAT(-1), 1617 (opcode == Bytecodes::_fcmpl ? -1 : 1)), 1618 -2); 1619 UPDATE_PC_AND_TOS_AND_CONTINUE(1, -1); 1620 } 1621 1622 CASE(_dcmpl): 1623 CASE(_dcmpg): 1624 { 1625 int r = VMdoubleCompare(STACK_DOUBLE(-3), 1626 STACK_DOUBLE(-1), 1627 (opcode == Bytecodes::_dcmpl ? -1 : 1)); 1628 MORE_STACK(-4); // Pop 1629 SET_STACK_INT(r, 0); 1630 UPDATE_PC_AND_TOS_AND_CONTINUE(1, 1); 1631 } 1632 1633 CASE(_lcmp): 1634 { 1635 int r = VMlongCompare(STACK_LONG(-3), STACK_LONG(-1)); 1636 MORE_STACK(-4); 1637 SET_STACK_INT(r, 0); 1638 UPDATE_PC_AND_TOS_AND_CONTINUE(1, 1); 1639 } 1640 1641 1642 /* Return from a method */ 1643 1644 CASE(_areturn): 1645 CASE(_ireturn): 1646 CASE(_freturn): 1647 { 1648 // Allow a safepoint before returning to frame manager. 1649 SAFEPOINT; 1650 1651 goto handle_return; 1652 } 1653 1654 CASE(_lreturn): 1655 CASE(_dreturn): 1656 { 1657 // Allow a safepoint before returning to frame manager. 1658 SAFEPOINT; 1659 goto handle_return; 1660 } 1661 1662 CASE(_return_register_finalizer): { 1663 1664 oop rcvr = LOCALS_OBJECT(0); 1665 VERIFY_OOP(rcvr); 1666 if (rcvr->klass()->has_finalizer()) { 1667 CALL_VM(InterpreterRuntime::register_finalizer(THREAD, rcvr), handle_exception); 1668 } 1669 goto handle_return; 1670 } 1671 CASE(_return): { 1672 1673 // Allow a safepoint before returning to frame manager. 1674 SAFEPOINT; 1675 goto handle_return; 1676 } 1677 1678 /* Array access byte-codes */ 1679 1680 /* Every array access byte-code starts out like this */ 1681 // arrayOopDesc* arrObj = (arrayOopDesc*)STACK_OBJECT(arrayOff); 1682 #define ARRAY_INTRO(arrayOff) \ 1683 arrayOop arrObj = (arrayOop)STACK_OBJECT(arrayOff); \ 1684 jint index = STACK_INT(arrayOff + 1); \ 1685 char message[jintAsStringSize]; \ 1686 CHECK_NULL(arrObj); \ 1687 if ((uint32_t)index >= (uint32_t)arrObj->length()) { \ 1688 sprintf(message, "%d", index); \ 1689 VM_JAVA_ERROR(vmSymbols::java_lang_ArrayIndexOutOfBoundsException(), \ 1690 message, note_rangeCheck_trap); \ 1691 } 1692 1693 /* 32-bit loads. These handle conversion from < 32-bit types */ 1694 #define ARRAY_LOADTO32(T, T2, format, stackRes, extra) \ 1695 { \ 1696 ARRAY_INTRO(-2); \ 1697 (void)extra; \ 1698 SET_ ## stackRes(*(T2 *)(((address) arrObj->base(T)) + index * sizeof(T2)), \ 1699 -2); \ 1700 UPDATE_PC_AND_TOS_AND_CONTINUE(1, -1); \ 1701 } 1702 1703 /* 64-bit loads */ 1704 #define ARRAY_LOADTO64(T,T2, stackRes, extra) \ 1705 { \ 1706 ARRAY_INTRO(-2); \ 1707 SET_ ## stackRes(*(T2 *)(((address) arrObj->base(T)) + index * sizeof(T2)), -1); \ 1708 (void)extra; \ 1709 UPDATE_PC_AND_CONTINUE(1); \ 1710 } 1711 1712 CASE(_iaload): 1713 ARRAY_LOADTO32(T_INT, jint, "%d", STACK_INT, 0); 1714 CASE(_faload): 1715 ARRAY_LOADTO32(T_FLOAT, jfloat, "%f", STACK_FLOAT, 0); 1716 CASE(_aaload): { 1717 ARRAY_INTRO(-2); 1718 SET_STACK_OBJECT(((objArrayOop) arrObj)->obj_at(index), -2); 1719 UPDATE_PC_AND_TOS_AND_CONTINUE(1, -1); 1720 } 1721 CASE(_baload): 1722 ARRAY_LOADTO32(T_BYTE, jbyte, "%d", STACK_INT, 0); 1723 CASE(_caload): 1724 ARRAY_LOADTO32(T_CHAR, jchar, "%d", STACK_INT, 0); 1725 CASE(_saload): 1726 ARRAY_LOADTO32(T_SHORT, jshort, "%d", STACK_INT, 0); 1727 CASE(_laload): 1728 ARRAY_LOADTO64(T_LONG, jlong, STACK_LONG, 0); 1729 CASE(_daload): 1730 ARRAY_LOADTO64(T_DOUBLE, jdouble, STACK_DOUBLE, 0); 1731 1732 /* 32-bit stores. These handle conversion to < 32-bit types */ 1733 #define ARRAY_STOREFROM32(T, T2, format, stackSrc, extra) \ 1734 { \ 1735 ARRAY_INTRO(-3); \ 1736 (void)extra; \ 1737 *(T2 *)(((address) arrObj->base(T)) + index * sizeof(T2)) = stackSrc( -1); \ 1738 UPDATE_PC_AND_TOS_AND_CONTINUE(1, -3); \ 1739 } 1740 1741 /* 64-bit stores */ 1742 #define ARRAY_STOREFROM64(T, T2, stackSrc, extra) \ 1743 { \ 1744 ARRAY_INTRO(-4); \ 1745 (void)extra; \ 1746 *(T2 *)(((address) arrObj->base(T)) + index * sizeof(T2)) = stackSrc( -1); \ 1747 UPDATE_PC_AND_TOS_AND_CONTINUE(1, -4); \ 1748 } 1749 1750 CASE(_iastore): 1751 ARRAY_STOREFROM32(T_INT, jint, "%d", STACK_INT, 0); 1752 CASE(_fastore): 1753 ARRAY_STOREFROM32(T_FLOAT, jfloat, "%f", STACK_FLOAT, 0); 1754 /* 1755 * This one looks different because of the assignability check 1756 */ 1757 CASE(_aastore): { 1758 oop rhsObject = STACK_OBJECT(-1); 1759 VERIFY_OOP(rhsObject); 1760 ARRAY_INTRO( -3); 1761 // arrObj, index are set 1762 if (rhsObject != NULL) { 1763 /* Check assignability of rhsObject into arrObj */ 1764 Klass* rhsKlass = rhsObject->klass(); // EBX (subclass) 1765 Klass* elemKlass = ObjArrayKlass::cast(arrObj->klass())->element_klass(); // superklass EAX 1766 // 1767 // Check for compatibilty. This check must not GC!! 1768 // Seems way more expensive now that we must dispatch 1769 // 1770 if (rhsKlass != elemKlass && !rhsKlass->is_subtype_of(elemKlass)) { // ebx->is... 1771 // Decrement counter if subtype check failed. 1772 BI_PROFILE_SUBTYPECHECK_FAILED(rhsKlass); 1773 VM_JAVA_ERROR(vmSymbols::java_lang_ArrayStoreException(), "", note_arrayCheck_trap); 1774 } 1775 // Profile checkcast with null_seen and receiver. 1776 BI_PROFILE_UPDATE_CHECKCAST(/*null_seen=*/false, rhsKlass); 1777 } else { 1778 // Profile checkcast with null_seen and receiver. 1779 BI_PROFILE_UPDATE_CHECKCAST(/*null_seen=*/true, NULL); 1780 } 1781 ((objArrayOop) arrObj)->obj_at_put(index, rhsObject); 1782 UPDATE_PC_AND_TOS_AND_CONTINUE(1, -3); 1783 } 1784 CASE(_bastore): 1785 ARRAY_STOREFROM32(T_BYTE, jbyte, "%d", STACK_INT, 0); 1786 CASE(_castore): 1787 ARRAY_STOREFROM32(T_CHAR, jchar, "%d", STACK_INT, 0); 1788 CASE(_sastore): 1789 ARRAY_STOREFROM32(T_SHORT, jshort, "%d", STACK_INT, 0); 1790 CASE(_lastore): 1791 ARRAY_STOREFROM64(T_LONG, jlong, STACK_LONG, 0); 1792 CASE(_dastore): 1793 ARRAY_STOREFROM64(T_DOUBLE, jdouble, STACK_DOUBLE, 0); 1794 1795 CASE(_arraylength): 1796 { 1797 arrayOop ary = (arrayOop) STACK_OBJECT(-1); 1798 CHECK_NULL(ary); 1799 SET_STACK_INT(ary->length(), -1); 1800 UPDATE_PC_AND_CONTINUE(1); 1801 } 1802 1803 /* monitorenter and monitorexit for locking/unlocking an object */ 1804 1805 CASE(_monitorenter): { 1806 oop lockee = STACK_OBJECT(-1); 1807 // derefing's lockee ought to provoke implicit null check 1808 CHECK_NULL(lockee); 1809 // find a free monitor or one already allocated for this object 1810 // if we find a matching object then we need a new monitor 1811 // since this is recursive enter 1812 BasicObjectLock* limit = istate->monitor_base(); 1813 BasicObjectLock* most_recent = (BasicObjectLock*) istate->stack_base(); 1814 BasicObjectLock* entry = NULL; 1815 while (most_recent != limit ) { 1816 if (most_recent->obj() == NULL) entry = most_recent; 1817 else if (most_recent->obj() == lockee) break; 1818 most_recent++; 1819 } 1820 if (entry != NULL) { 1821 entry->set_obj(lockee); 1822 int success = false; 1823 uintptr_t epoch_mask_in_place = (uintptr_t)markOopDesc::epoch_mask_in_place; 1824 1825 markOop mark = lockee->mark(); 1826 intptr_t hash = (intptr_t) markOopDesc::no_hash; 1827 // implies UseBiasedLocking 1828 if (mark->has_bias_pattern()) { 1829 uintptr_t thread_ident; 1830 uintptr_t anticipated_bias_locking_value; 1831 thread_ident = (uintptr_t)istate->thread(); 1832 anticipated_bias_locking_value = 1833 (((uintptr_t)lockee->klass()->prototype_header() | thread_ident) ^ (uintptr_t)mark) & 1834 ~((uintptr_t) markOopDesc::age_mask_in_place); 1835 1836 if (anticipated_bias_locking_value == 0) { 1837 // already biased towards this thread, nothing to do 1838 if (PrintBiasedLockingStatistics) { 1839 (* BiasedLocking::biased_lock_entry_count_addr())++; 1840 } 1841 success = true; 1842 } 1843 else if ((anticipated_bias_locking_value & markOopDesc::biased_lock_mask_in_place) != 0) { 1844 // try revoke bias 1845 markOop header = lockee->klass()->prototype_header(); 1846 if (hash != markOopDesc::no_hash) { 1847 header = header->copy_set_hash(hash); 1848 } 1849 if (Atomic::cmpxchg_ptr(header, lockee->mark_addr(), mark) == mark) { 1850 if (PrintBiasedLockingStatistics) 1851 (*BiasedLocking::revoked_lock_entry_count_addr())++; 1852 } 1853 } 1854 else if ((anticipated_bias_locking_value & epoch_mask_in_place) !=0) { 1855 // try rebias 1856 markOop new_header = (markOop) ( (intptr_t) lockee->klass()->prototype_header() | thread_ident); 1857 if (hash != markOopDesc::no_hash) { 1858 new_header = new_header->copy_set_hash(hash); 1859 } 1860 if (Atomic::cmpxchg_ptr((void*)new_header, lockee->mark_addr(), mark) == mark) { 1861 if (PrintBiasedLockingStatistics) 1862 (* BiasedLocking::rebiased_lock_entry_count_addr())++; 1863 } 1864 else { 1865 CALL_VM(InterpreterRuntime::monitorenter(THREAD, entry), handle_exception); 1866 } 1867 success = true; 1868 } 1869 else { 1870 // try to bias towards thread in case object is anonymously biased 1871 markOop header = (markOop) ((uintptr_t) mark & ((uintptr_t)markOopDesc::biased_lock_mask_in_place | 1872 (uintptr_t)markOopDesc::age_mask_in_place | 1873 epoch_mask_in_place)); 1874 if (hash != markOopDesc::no_hash) { 1875 header = header->copy_set_hash(hash); 1876 } 1877 markOop new_header = (markOop) ((uintptr_t) header | thread_ident); 1878 // debugging hint 1879 DEBUG_ONLY(entry->lock()->set_displaced_header((markOop) (uintptr_t) 0xdeaddead);) 1880 if (Atomic::cmpxchg_ptr((void*)new_header, lockee->mark_addr(), header) == header) { 1881 if (PrintBiasedLockingStatistics) 1882 (* BiasedLocking::anonymously_biased_lock_entry_count_addr())++; 1883 } 1884 else { 1885 CALL_VM(InterpreterRuntime::monitorenter(THREAD, entry), handle_exception); 1886 } 1887 success = true; 1888 } 1889 } 1890 1891 // traditional lightweight locking 1892 if (!success) { 1893 markOop displaced = lockee->mark()->set_unlocked(); 1894 entry->lock()->set_displaced_header(displaced); 1895 bool call_vm = UseHeavyMonitors; 1896 if (call_vm || Atomic::cmpxchg_ptr(entry, lockee->mark_addr(), displaced) != displaced) { 1897 // Is it simple recursive case? 1898 if (!call_vm && THREAD->is_lock_owned((address) displaced->clear_lock_bits())) { 1899 entry->lock()->set_displaced_header(NULL); 1900 } else { 1901 CALL_VM(InterpreterRuntime::monitorenter(THREAD, entry), handle_exception); 1902 } 1903 } 1904 } 1905 UPDATE_PC_AND_TOS_AND_CONTINUE(1, -1); 1906 } else { 1907 istate->set_msg(more_monitors); 1908 UPDATE_PC_AND_RETURN(0); // Re-execute 1909 } 1910 } 1911 1912 CASE(_monitorexit): { 1913 oop lockee = STACK_OBJECT(-1); 1914 CHECK_NULL(lockee); 1915 // derefing's lockee ought to provoke implicit null check 1916 // find our monitor slot 1917 BasicObjectLock* limit = istate->monitor_base(); 1918 BasicObjectLock* most_recent = (BasicObjectLock*) istate->stack_base(); 1919 while (most_recent != limit ) { 1920 if ((most_recent)->obj() == lockee) { 1921 BasicLock* lock = most_recent->lock(); 1922 markOop header = lock->displaced_header(); 1923 most_recent->set_obj(NULL); 1924 if (!lockee->mark()->has_bias_pattern()) { 1925 bool call_vm = UseHeavyMonitors; 1926 // If it isn't recursive we either must swap old header or call the runtime 1927 if (header != NULL || call_vm) { 1928 if (call_vm || Atomic::cmpxchg_ptr(header, lockee->mark_addr(), lock) != lock) { 1929 // restore object for the slow case 1930 most_recent->set_obj(lockee); 1931 CALL_VM(InterpreterRuntime::monitorexit(THREAD, most_recent), handle_exception); 1932 } 1933 } 1934 } 1935 UPDATE_PC_AND_TOS_AND_CONTINUE(1, -1); 1936 } 1937 most_recent++; 1938 } 1939 // Need to throw illegal monitor state exception 1940 CALL_VM(InterpreterRuntime::throw_illegal_monitor_state_exception(THREAD), handle_exception); 1941 ShouldNotReachHere(); 1942 } 1943 1944 /* All of the non-quick opcodes. */ 1945 1946 /* -Set clobbersCpIndex true if the quickened opcode clobbers the 1947 * constant pool index in the instruction. 1948 */ 1949 CASE(_getfield): 1950 CASE(_getstatic): 1951 { 1952 u2 index; 1953 ConstantPoolCacheEntry* cache; 1954 index = Bytes::get_native_u2(pc+1); 1955 1956 // QQQ Need to make this as inlined as possible. Probably need to 1957 // split all the bytecode cases out so c++ compiler has a chance 1958 // for constant prop to fold everything possible away. 1959 1960 cache = cp->entry_at(index); 1961 if (!cache->is_resolved((Bytecodes::Code)opcode)) { 1962 CALL_VM(InterpreterRuntime::resolve_get_put(THREAD, (Bytecodes::Code)opcode), 1963 handle_exception); 1964 cache = cp->entry_at(index); 1965 } 1966 1967 #ifdef VM_JVMTI 1968 if (_jvmti_interp_events) { 1969 int *count_addr; 1970 oop obj; 1971 // Check to see if a field modification watch has been set 1972 // before we take the time to call into the VM. 1973 count_addr = (int *)JvmtiExport::get_field_access_count_addr(); 1974 if ( *count_addr > 0 ) { 1975 if ((Bytecodes::Code)opcode == Bytecodes::_getstatic) { 1976 obj = (oop)NULL; 1977 } else { 1978 obj = (oop) STACK_OBJECT(-1); 1979 VERIFY_OOP(obj); 1980 } 1981 CALL_VM(InterpreterRuntime::post_field_access(THREAD, 1982 obj, 1983 cache), 1984 handle_exception); 1985 } 1986 } 1987 #endif /* VM_JVMTI */ 1988 1989 oop obj; 1990 if ((Bytecodes::Code)opcode == Bytecodes::_getstatic) { 1991 Klass* k = cache->f1_as_klass(); 1992 obj = k->java_mirror(); 1993 MORE_STACK(1); // Assume single slot push 1994 } else { 1995 obj = (oop) STACK_OBJECT(-1); 1996 CHECK_NULL(obj); 1997 } 1998 1999 // 2000 // Now store the result on the stack 2001 // 2002 TosState tos_type = cache->flag_state(); 2003 int field_offset = cache->f2_as_index(); 2004 if (cache->is_volatile()) { 2005 if (support_IRIW_for_not_multiple_copy_atomic_cpu) { 2006 OrderAccess::fence(); 2007 } 2008 if (tos_type == atos) { 2009 VERIFY_OOP(obj->obj_field_acquire(field_offset)); 2010 SET_STACK_OBJECT(obj->obj_field_acquire(field_offset), -1); 2011 } else if (tos_type == itos) { 2012 SET_STACK_INT(obj->int_field_acquire(field_offset), -1); 2013 } else if (tos_type == ltos) { 2014 SET_STACK_LONG(obj->long_field_acquire(field_offset), 0); 2015 MORE_STACK(1); 2016 } else if (tos_type == btos) { 2017 SET_STACK_INT(obj->byte_field_acquire(field_offset), -1); 2018 } else if (tos_type == ctos) { 2019 SET_STACK_INT(obj->char_field_acquire(field_offset), -1); 2020 } else if (tos_type == stos) { 2021 SET_STACK_INT(obj->short_field_acquire(field_offset), -1); 2022 } else if (tos_type == ftos) { 2023 SET_STACK_FLOAT(obj->float_field_acquire(field_offset), -1); 2024 } else { 2025 SET_STACK_DOUBLE(obj->double_field_acquire(field_offset), 0); 2026 MORE_STACK(1); 2027 } 2028 } else { 2029 if (tos_type == atos) { 2030 VERIFY_OOP(obj->obj_field(field_offset)); 2031 SET_STACK_OBJECT(obj->obj_field(field_offset), -1); 2032 } else if (tos_type == itos) { 2033 SET_STACK_INT(obj->int_field(field_offset), -1); 2034 } else if (tos_type == ltos) { 2035 SET_STACK_LONG(obj->long_field(field_offset), 0); 2036 MORE_STACK(1); 2037 } else if (tos_type == btos) { 2038 SET_STACK_INT(obj->byte_field(field_offset), -1); 2039 } else if (tos_type == ctos) { 2040 SET_STACK_INT(obj->char_field(field_offset), -1); 2041 } else if (tos_type == stos) { 2042 SET_STACK_INT(obj->short_field(field_offset), -1); 2043 } else if (tos_type == ftos) { 2044 SET_STACK_FLOAT(obj->float_field(field_offset), -1); 2045 } else { 2046 SET_STACK_DOUBLE(obj->double_field(field_offset), 0); 2047 MORE_STACK(1); 2048 } 2049 } 2050 2051 UPDATE_PC_AND_CONTINUE(3); 2052 } 2053 2054 CASE(_putfield): 2055 CASE(_putstatic): 2056 { 2057 u2 index = Bytes::get_native_u2(pc+1); 2058 ConstantPoolCacheEntry* cache = cp->entry_at(index); 2059 if (!cache->is_resolved((Bytecodes::Code)opcode)) { 2060 CALL_VM(InterpreterRuntime::resolve_get_put(THREAD, (Bytecodes::Code)opcode), 2061 handle_exception); 2062 cache = cp->entry_at(index); 2063 } 2064 2065 #ifdef VM_JVMTI 2066 if (_jvmti_interp_events) { 2067 int *count_addr; 2068 oop obj; 2069 // Check to see if a field modification watch has been set 2070 // before we take the time to call into the VM. 2071 count_addr = (int *)JvmtiExport::get_field_modification_count_addr(); 2072 if ( *count_addr > 0 ) { 2073 if ((Bytecodes::Code)opcode == Bytecodes::_putstatic) { 2074 obj = (oop)NULL; 2075 } 2076 else { 2077 if (cache->is_long() || cache->is_double()) { 2078 obj = (oop) STACK_OBJECT(-3); 2079 } else { 2080 obj = (oop) STACK_OBJECT(-2); 2081 } 2082 VERIFY_OOP(obj); 2083 } 2084 2085 CALL_VM(InterpreterRuntime::post_field_modification(THREAD, 2086 obj, 2087 cache, 2088 (jvalue *)STACK_SLOT(-1)), 2089 handle_exception); 2090 } 2091 } 2092 #endif /* VM_JVMTI */ 2093 2094 // QQQ Need to make this as inlined as possible. Probably need to split all the bytecode cases 2095 // out so c++ compiler has a chance for constant prop to fold everything possible away. 2096 2097 oop obj; 2098 int count; 2099 TosState tos_type = cache->flag_state(); 2100 2101 count = -1; 2102 if (tos_type == ltos || tos_type == dtos) { 2103 --count; 2104 } 2105 if ((Bytecodes::Code)opcode == Bytecodes::_putstatic) { 2106 Klass* k = cache->f1_as_klass(); 2107 obj = k->java_mirror(); 2108 } else { 2109 --count; 2110 obj = (oop) STACK_OBJECT(count); 2111 CHECK_NULL(obj); 2112 } 2113 2114 // 2115 // Now store the result 2116 // 2117 int field_offset = cache->f2_as_index(); 2118 if (cache->is_volatile()) { 2119 if (tos_type == itos) { 2120 obj->release_int_field_put(field_offset, STACK_INT(-1)); 2121 } else if (tos_type == atos) { 2122 VERIFY_OOP(STACK_OBJECT(-1)); 2123 obj->release_obj_field_put(field_offset, STACK_OBJECT(-1)); 2124 } else if (tos_type == btos) { 2125 obj->release_byte_field_put(field_offset, STACK_INT(-1)); 2126 } else if (tos_type == ltos) { 2127 obj->release_long_field_put(field_offset, STACK_LONG(-1)); 2128 } else if (tos_type == ctos) { 2129 obj->release_char_field_put(field_offset, STACK_INT(-1)); 2130 } else if (tos_type == stos) { 2131 obj->release_short_field_put(field_offset, STACK_INT(-1)); 2132 } else if (tos_type == ftos) { 2133 obj->release_float_field_put(field_offset, STACK_FLOAT(-1)); 2134 } else { 2135 obj->release_double_field_put(field_offset, STACK_DOUBLE(-1)); 2136 } 2137 OrderAccess::storeload(); 2138 } else { 2139 if (tos_type == itos) { 2140 obj->int_field_put(field_offset, STACK_INT(-1)); 2141 } else if (tos_type == atos) { 2142 VERIFY_OOP(STACK_OBJECT(-1)); 2143 obj->obj_field_put(field_offset, STACK_OBJECT(-1)); 2144 } else if (tos_type == btos) { 2145 obj->byte_field_put(field_offset, STACK_INT(-1)); 2146 } else if (tos_type == ltos) { 2147 obj->long_field_put(field_offset, STACK_LONG(-1)); 2148 } else if (tos_type == ctos) { 2149 obj->char_field_put(field_offset, STACK_INT(-1)); 2150 } else if (tos_type == stos) { 2151 obj->short_field_put(field_offset, STACK_INT(-1)); 2152 } else if (tos_type == ftos) { 2153 obj->float_field_put(field_offset, STACK_FLOAT(-1)); 2154 } else { 2155 obj->double_field_put(field_offset, STACK_DOUBLE(-1)); 2156 } 2157 } 2158 2159 UPDATE_PC_AND_TOS_AND_CONTINUE(3, count); 2160 } 2161 2162 CASE(_new): { 2163 u2 index = Bytes::get_Java_u2(pc+1); 2164 ConstantPool* constants = istate->method()->constants(); 2165 if (!constants->tag_at(index).is_unresolved_klass()) { 2166 // Make sure klass is initialized and doesn't have a finalizer 2167 Klass* entry = constants->slot_at(index).get_klass(); 2168 assert(entry->is_klass(), "Should be resolved klass"); 2169 Klass* k_entry = (Klass*) entry; 2170 assert(k_entry->oop_is_instance(), "Should be InstanceKlass"); 2171 InstanceKlass* ik = (InstanceKlass*) k_entry; 2172 if ( ik->is_initialized() && ik->can_be_fastpath_allocated() ) { 2173 size_t obj_size = ik->size_helper(); 2174 oop result = NULL; 2175 // If the TLAB isn't pre-zeroed then we'll have to do it 2176 bool need_zero = !ZeroTLAB; 2177 if (UseTLAB) { 2178 result = (oop) THREAD->tlab().allocate(obj_size); 2179 } 2180 // Disable non-TLAB-based fast-path, because profiling requires that all 2181 // allocations go through InterpreterRuntime::_new() if THREAD->tlab().allocate 2182 // returns NULL. 2183 #ifndef CC_INTERP_PROFILE 2184 if (result == NULL) { 2185 need_zero = true; 2186 // Try allocate in shared eden 2187 retry: 2188 HeapWord* compare_to = *Universe::heap()->top_addr(); 2189 HeapWord* new_top = compare_to + obj_size; 2190 if (new_top <= *Universe::heap()->end_addr()) { 2191 if (Atomic::cmpxchg_ptr(new_top, Universe::heap()->top_addr(), compare_to) != compare_to) { 2192 goto retry; 2193 } 2194 result = (oop) compare_to; 2195 } 2196 } 2197 #endif 2198 if (result != NULL) { 2199 // Initialize object (if nonzero size and need) and then the header 2200 if (need_zero ) { 2201 HeapWord* to_zero = (HeapWord*) result + sizeof(oopDesc) / oopSize; 2202 obj_size -= sizeof(oopDesc) / oopSize; 2203 if (obj_size > 0 ) { 2204 memset(to_zero, 0, obj_size * HeapWordSize); 2205 } 2206 } 2207 if (UseBiasedLocking) { 2208 result->set_mark(ik->prototype_header()); 2209 } else { 2210 result->set_mark(markOopDesc::prototype()); 2211 } 2212 result->set_klass_gap(0); 2213 result->set_klass(k_entry); 2214 // Must prevent reordering of stores for object initialization 2215 // with stores that publish the new object. 2216 OrderAccess::storestore(); 2217 SET_STACK_OBJECT(result, 0); 2218 UPDATE_PC_AND_TOS_AND_CONTINUE(3, 1); 2219 } 2220 } 2221 } 2222 // Slow case allocation 2223 CALL_VM(InterpreterRuntime::_new(THREAD, METHOD->constants(), index), 2224 handle_exception); 2225 // Must prevent reordering of stores for object initialization 2226 // with stores that publish the new object. 2227 OrderAccess::storestore(); 2228 SET_STACK_OBJECT(THREAD->vm_result(), 0); 2229 THREAD->set_vm_result(NULL); 2230 UPDATE_PC_AND_TOS_AND_CONTINUE(3, 1); 2231 } 2232 CASE(_anewarray): { 2233 u2 index = Bytes::get_Java_u2(pc+1); 2234 jint size = STACK_INT(-1); 2235 CALL_VM(InterpreterRuntime::anewarray(THREAD, METHOD->constants(), index, size), 2236 handle_exception); 2237 // Must prevent reordering of stores for object initialization 2238 // with stores that publish the new object. 2239 OrderAccess::storestore(); 2240 SET_STACK_OBJECT(THREAD->vm_result(), -1); 2241 THREAD->set_vm_result(NULL); 2242 UPDATE_PC_AND_CONTINUE(3); 2243 } 2244 CASE(_multianewarray): { 2245 jint dims = *(pc+3); 2246 jint size = STACK_INT(-1); 2247 // stack grows down, dimensions are up! 2248 jint *dimarray = 2249 (jint*)&topOfStack[dims * Interpreter::stackElementWords+ 2250 Interpreter::stackElementWords-1]; 2251 //adjust pointer to start of stack element 2252 CALL_VM(InterpreterRuntime::multianewarray(THREAD, dimarray), 2253 handle_exception); 2254 // Must prevent reordering of stores for object initialization 2255 // with stores that publish the new object. 2256 OrderAccess::storestore(); 2257 SET_STACK_OBJECT(THREAD->vm_result(), -dims); 2258 THREAD->set_vm_result(NULL); 2259 UPDATE_PC_AND_TOS_AND_CONTINUE(4, -(dims-1)); 2260 } 2261 CASE(_checkcast): 2262 if (STACK_OBJECT(-1) != NULL) { 2263 VERIFY_OOP(STACK_OBJECT(-1)); 2264 u2 index = Bytes::get_Java_u2(pc+1); 2265 // Constant pool may have actual klass or unresolved klass. If it is 2266 // unresolved we must resolve it. 2267 if (METHOD->constants()->tag_at(index).is_unresolved_klass()) { 2268 CALL_VM(InterpreterRuntime::quicken_io_cc(THREAD), handle_exception); 2269 } 2270 Klass* klassOf = (Klass*) METHOD->constants()->slot_at(index).get_klass(); 2271 Klass* objKlass = STACK_OBJECT(-1)->klass(); // ebx 2272 // 2273 // Check for compatibilty. This check must not GC!! 2274 // Seems way more expensive now that we must dispatch. 2275 // 2276 if (objKlass != klassOf && !objKlass->is_subtype_of(klassOf)) { 2277 // Decrement counter at checkcast. 2278 BI_PROFILE_SUBTYPECHECK_FAILED(objKlass); 2279 ResourceMark rm(THREAD); 2280 const char* objName = objKlass->external_name(); 2281 const char* klassName = klassOf->external_name(); 2282 char* message = SharedRuntime::generate_class_cast_message( 2283 objName, klassName); 2284 VM_JAVA_ERROR(vmSymbols::java_lang_ClassCastException(), message, note_classCheck_trap); 2285 } 2286 // Profile checkcast with null_seen and receiver. 2287 BI_PROFILE_UPDATE_CHECKCAST(/*null_seen=*/false, objKlass); 2288 } else { 2289 // Profile checkcast with null_seen and receiver. 2290 BI_PROFILE_UPDATE_CHECKCAST(/*null_seen=*/true, NULL); 2291 } 2292 UPDATE_PC_AND_CONTINUE(3); 2293 2294 CASE(_instanceof): 2295 if (STACK_OBJECT(-1) == NULL) { 2296 SET_STACK_INT(0, -1); 2297 // Profile instanceof with null_seen and receiver. 2298 BI_PROFILE_UPDATE_INSTANCEOF(/*null_seen=*/true, NULL); 2299 } else { 2300 VERIFY_OOP(STACK_OBJECT(-1)); 2301 u2 index = Bytes::get_Java_u2(pc+1); 2302 // Constant pool may have actual klass or unresolved klass. If it is 2303 // unresolved we must resolve it. 2304 if (METHOD->constants()->tag_at(index).is_unresolved_klass()) { 2305 CALL_VM(InterpreterRuntime::quicken_io_cc(THREAD), handle_exception); 2306 } 2307 Klass* klassOf = (Klass*) METHOD->constants()->slot_at(index).get_klass(); 2308 Klass* objKlass = STACK_OBJECT(-1)->klass(); 2309 // 2310 // Check for compatibilty. This check must not GC!! 2311 // Seems way more expensive now that we must dispatch. 2312 // 2313 if ( objKlass == klassOf || objKlass->is_subtype_of(klassOf)) { 2314 SET_STACK_INT(1, -1); 2315 } else { 2316 SET_STACK_INT(0, -1); 2317 // Decrement counter at checkcast. 2318 BI_PROFILE_SUBTYPECHECK_FAILED(objKlass); 2319 } 2320 // Profile instanceof with null_seen and receiver. 2321 BI_PROFILE_UPDATE_INSTANCEOF(/*null_seen=*/false, objKlass); 2322 } 2323 UPDATE_PC_AND_CONTINUE(3); 2324 2325 CASE(_ldc_w): 2326 CASE(_ldc): 2327 { 2328 u2 index; 2329 bool wide = false; 2330 int incr = 2; // frequent case 2331 if (opcode == Bytecodes::_ldc) { 2332 index = pc[1]; 2333 } else { 2334 index = Bytes::get_Java_u2(pc+1); 2335 incr = 3; 2336 wide = true; 2337 } 2338 2339 ConstantPool* constants = METHOD->constants(); 2340 switch (constants->tag_at(index).value()) { 2341 case JVM_CONSTANT_Integer: 2342 SET_STACK_INT(constants->int_at(index), 0); 2343 break; 2344 2345 case JVM_CONSTANT_Float: 2346 SET_STACK_FLOAT(constants->float_at(index), 0); 2347 break; 2348 2349 case JVM_CONSTANT_String: 2350 { 2351 oop result = constants->resolved_references()->obj_at(index); 2352 if (result == NULL) { 2353 CALL_VM(InterpreterRuntime::resolve_ldc(THREAD, (Bytecodes::Code) opcode), handle_exception); 2354 SET_STACK_OBJECT(THREAD->vm_result(), 0); 2355 THREAD->set_vm_result(NULL); 2356 } else { 2357 VERIFY_OOP(result); 2358 SET_STACK_OBJECT(result, 0); 2359 } 2360 break; 2361 } 2362 2363 case JVM_CONSTANT_Class: 2364 VERIFY_OOP(constants->resolved_klass_at(index)->java_mirror()); 2365 SET_STACK_OBJECT(constants->resolved_klass_at(index)->java_mirror(), 0); 2366 break; 2367 2368 case JVM_CONSTANT_UnresolvedClass: 2369 case JVM_CONSTANT_UnresolvedClassInError: 2370 CALL_VM(InterpreterRuntime::ldc(THREAD, wide), handle_exception); 2371 SET_STACK_OBJECT(THREAD->vm_result(), 0); 2372 THREAD->set_vm_result(NULL); 2373 break; 2374 2375 default: ShouldNotReachHere(); 2376 } 2377 UPDATE_PC_AND_TOS_AND_CONTINUE(incr, 1); 2378 } 2379 2380 CASE(_ldc2_w): 2381 { 2382 u2 index = Bytes::get_Java_u2(pc+1); 2383 2384 ConstantPool* constants = METHOD->constants(); 2385 switch (constants->tag_at(index).value()) { 2386 2387 case JVM_CONSTANT_Long: 2388 SET_STACK_LONG(constants->long_at(index), 1); 2389 break; 2390 2391 case JVM_CONSTANT_Double: 2392 SET_STACK_DOUBLE(constants->double_at(index), 1); 2393 break; 2394 default: ShouldNotReachHere(); 2395 } 2396 UPDATE_PC_AND_TOS_AND_CONTINUE(3, 2); 2397 } 2398 2399 CASE(_fast_aldc_w): 2400 CASE(_fast_aldc): { 2401 u2 index; 2402 int incr; 2403 if (opcode == Bytecodes::_fast_aldc) { 2404 index = pc[1]; 2405 incr = 2; 2406 } else { 2407 index = Bytes::get_native_u2(pc+1); 2408 incr = 3; 2409 } 2410 2411 // We are resolved if the f1 field contains a non-null object (CallSite, etc.) 2412 // This kind of CP cache entry does not need to match the flags byte, because 2413 // there is a 1-1 relation between bytecode type and CP entry type. 2414 ConstantPool* constants = METHOD->constants(); 2415 oop result = constants->resolved_references()->obj_at(index); 2416 if (result == NULL) { 2417 CALL_VM(InterpreterRuntime::resolve_ldc(THREAD, (Bytecodes::Code) opcode), 2418 handle_exception); 2419 result = THREAD->vm_result(); 2420 } 2421 2422 VERIFY_OOP(result); 2423 SET_STACK_OBJECT(result, 0); 2424 UPDATE_PC_AND_TOS_AND_CONTINUE(incr, 1); 2425 } 2426 2427 CASE(_invokedynamic): { 2428 2429 if (!EnableInvokeDynamic) { 2430 // We should not encounter this bytecode if !EnableInvokeDynamic. 2431 // The verifier will stop it. However, if we get past the verifier, 2432 // this will stop the thread in a reasonable way, without crashing the JVM. 2433 CALL_VM(InterpreterRuntime::throw_IncompatibleClassChangeError(THREAD), 2434 handle_exception); 2435 ShouldNotReachHere(); 2436 } 2437 2438 u4 index = Bytes::get_native_u4(pc+1); 2439 ConstantPoolCacheEntry* cache = cp->constant_pool()->invokedynamic_cp_cache_entry_at(index); 2440 2441 // We are resolved if the resolved_references field contains a non-null object (CallSite, etc.) 2442 // This kind of CP cache entry does not need to match the flags byte, because 2443 // there is a 1-1 relation between bytecode type and CP entry type. 2444 if (! cache->is_resolved((Bytecodes::Code) opcode)) { 2445 CALL_VM(InterpreterRuntime::resolve_invokedynamic(THREAD), 2446 handle_exception); 2447 cache = cp->constant_pool()->invokedynamic_cp_cache_entry_at(index); 2448 } 2449 2450 Method* method = cache->f1_as_method(); 2451 if (VerifyOops) method->verify(); 2452 2453 if (cache->has_appendix()) { 2454 ConstantPool* constants = METHOD->constants(); 2455 SET_STACK_OBJECT(cache->appendix_if_resolved(constants), 0); 2456 MORE_STACK(1); 2457 } 2458 2459 istate->set_msg(call_method); 2460 istate->set_callee(method); 2461 istate->set_callee_entry_point(method->from_interpreted_entry()); 2462 istate->set_bcp_advance(5); 2463 2464 // Invokedynamic has got a call counter, just like an invokestatic -> increment! 2465 BI_PROFILE_UPDATE_CALL(); 2466 2467 UPDATE_PC_AND_RETURN(0); // I'll be back... 2468 } 2469 2470 CASE(_invokehandle): { 2471 2472 if (!EnableInvokeDynamic) { 2473 ShouldNotReachHere(); 2474 } 2475 2476 u2 index = Bytes::get_native_u2(pc+1); 2477 ConstantPoolCacheEntry* cache = cp->entry_at(index); 2478 2479 if (! cache->is_resolved((Bytecodes::Code) opcode)) { 2480 CALL_VM(InterpreterRuntime::resolve_invokehandle(THREAD), 2481 handle_exception); 2482 cache = cp->entry_at(index); 2483 } 2484 2485 Method* method = cache->f1_as_method(); 2486 if (VerifyOops) method->verify(); 2487 2488 if (cache->has_appendix()) { 2489 ConstantPool* constants = METHOD->constants(); 2490 SET_STACK_OBJECT(cache->appendix_if_resolved(constants), 0); 2491 MORE_STACK(1); 2492 } 2493 2494 istate->set_msg(call_method); 2495 istate->set_callee(method); 2496 istate->set_callee_entry_point(method->from_interpreted_entry()); 2497 istate->set_bcp_advance(3); 2498 2499 // Invokehandle has got a call counter, just like a final call -> increment! 2500 BI_PROFILE_UPDATE_FINALCALL(); 2501 2502 UPDATE_PC_AND_RETURN(0); // I'll be back... 2503 } 2504 2505 CASE(_invokeinterface): { 2506 u2 index = Bytes::get_native_u2(pc+1); 2507 2508 // QQQ Need to make this as inlined as possible. Probably need to split all the bytecode cases 2509 // out so c++ compiler has a chance for constant prop to fold everything possible away. 2510 2511 ConstantPoolCacheEntry* cache = cp->entry_at(index); 2512 if (!cache->is_resolved((Bytecodes::Code)opcode)) { 2513 CALL_VM(InterpreterRuntime::resolve_invoke(THREAD, (Bytecodes::Code)opcode), 2514 handle_exception); 2515 cache = cp->entry_at(index); 2516 } 2517 2518 istate->set_msg(call_method); 2519 2520 // Special case of invokeinterface called for virtual method of 2521 // java.lang.Object. See cpCacheOop.cpp for details. 2522 // This code isn't produced by javac, but could be produced by 2523 // another compliant java compiler. 2524 if (cache->is_forced_virtual()) { 2525 Method* callee; 2526 CHECK_NULL(STACK_OBJECT(-(cache->parameter_size()))); 2527 if (cache->is_vfinal()) { 2528 callee = cache->f2_as_vfinal_method(); 2529 // Profile 'special case of invokeinterface' final call. 2530 BI_PROFILE_UPDATE_FINALCALL(); 2531 } else { 2532 // Get receiver. 2533 int parms = cache->parameter_size(); 2534 // Same comments as invokevirtual apply here. 2535 oop rcvr = STACK_OBJECT(-parms); 2536 VERIFY_OOP(rcvr); 2537 InstanceKlass* rcvrKlass = (InstanceKlass*)rcvr->klass(); 2538 callee = (Method*) rcvrKlass->start_of_vtable()[ cache->f2_as_index()]; 2539 // Profile 'special case of invokeinterface' virtual call. 2540 BI_PROFILE_UPDATE_VIRTUALCALL(rcvr->klass()); 2541 } 2542 istate->set_callee(callee); 2543 istate->set_callee_entry_point(callee->from_interpreted_entry()); 2544 #ifdef VM_JVMTI 2545 if (JvmtiExport::can_post_interpreter_events() && THREAD->is_interp_only_mode()) { 2546 istate->set_callee_entry_point(callee->interpreter_entry()); 2547 } 2548 #endif /* VM_JVMTI */ 2549 istate->set_bcp_advance(5); 2550 UPDATE_PC_AND_RETURN(0); // I'll be back... 2551 } 2552 2553 // this could definitely be cleaned up QQQ 2554 Method* callee; 2555 Klass* iclass = cache->f1_as_klass(); 2556 // InstanceKlass* interface = (InstanceKlass*) iclass; 2557 // get receiver 2558 int parms = cache->parameter_size(); 2559 oop rcvr = STACK_OBJECT(-parms); 2560 CHECK_NULL(rcvr); 2561 InstanceKlass* int2 = (InstanceKlass*) rcvr->klass(); 2562 itableOffsetEntry* ki = (itableOffsetEntry*) int2->start_of_itable(); 2563 int i; 2564 for ( i = 0 ; i < int2->itable_length() ; i++, ki++ ) { 2565 if (ki->interface_klass() == iclass) break; 2566 } 2567 // If the interface isn't found, this class doesn't implement this 2568 // interface. The link resolver checks this but only for the first 2569 // time this interface is called. 2570 if (i == int2->itable_length()) { 2571 VM_JAVA_ERROR(vmSymbols::java_lang_IncompatibleClassChangeError(), "", note_no_trap); 2572 } 2573 int mindex = cache->f2_as_index(); 2574 itableMethodEntry* im = ki->first_method_entry(rcvr->klass()); 2575 callee = im[mindex].method(); 2576 if (callee == NULL) { 2577 VM_JAVA_ERROR(vmSymbols::java_lang_AbstractMethodError(), "", note_no_trap); 2578 } 2579 2580 // Profile virtual call. 2581 BI_PROFILE_UPDATE_VIRTUALCALL(rcvr->klass()); 2582 2583 istate->set_callee(callee); 2584 istate->set_callee_entry_point(callee->from_interpreted_entry()); 2585 #ifdef VM_JVMTI 2586 if (JvmtiExport::can_post_interpreter_events() && THREAD->is_interp_only_mode()) { 2587 istate->set_callee_entry_point(callee->interpreter_entry()); 2588 } 2589 #endif /* VM_JVMTI */ 2590 istate->set_bcp_advance(5); 2591 UPDATE_PC_AND_RETURN(0); // I'll be back... 2592 } 2593 2594 CASE(_invokevirtual): 2595 CASE(_invokespecial): 2596 CASE(_invokestatic): { 2597 u2 index = Bytes::get_native_u2(pc+1); 2598 2599 ConstantPoolCacheEntry* cache = cp->entry_at(index); 2600 // QQQ Need to make this as inlined as possible. Probably need to split all the bytecode cases 2601 // out so c++ compiler has a chance for constant prop to fold everything possible away. 2602 2603 if (!cache->is_resolved((Bytecodes::Code)opcode)) { 2604 CALL_VM(InterpreterRuntime::resolve_invoke(THREAD, (Bytecodes::Code)opcode), 2605 handle_exception); 2606 cache = cp->entry_at(index); 2607 } 2608 2609 istate->set_msg(call_method); 2610 { 2611 Method* callee; 2612 if ((Bytecodes::Code)opcode == Bytecodes::_invokevirtual) { 2613 CHECK_NULL(STACK_OBJECT(-(cache->parameter_size()))); 2614 if (cache->is_vfinal()) { 2615 callee = cache->f2_as_vfinal_method(); 2616 // Profile final call. 2617 BI_PROFILE_UPDATE_FINALCALL(); 2618 } else { 2619 // get receiver 2620 int parms = cache->parameter_size(); 2621 // this works but needs a resourcemark and seems to create a vtable on every call: 2622 // Method* callee = rcvr->klass()->vtable()->method_at(cache->f2_as_index()); 2623 // 2624 // this fails with an assert 2625 // InstanceKlass* rcvrKlass = InstanceKlass::cast(STACK_OBJECT(-parms)->klass()); 2626 // but this works 2627 oop rcvr = STACK_OBJECT(-parms); 2628 VERIFY_OOP(rcvr); 2629 InstanceKlass* rcvrKlass = (InstanceKlass*)rcvr->klass(); 2630 /* 2631 Executing this code in java.lang.String: 2632 public String(char value[]) { 2633 this.count = value.length; 2634 this.value = (char[])value.clone(); 2635 } 2636 2637 a find on rcvr->klass() reports: 2638 {type array char}{type array class} 2639 - klass: {other class} 2640 2641 but using InstanceKlass::cast(STACK_OBJECT(-parms)->klass()) causes in assertion failure 2642 because rcvr->klass()->oop_is_instance() == 0 2643 However it seems to have a vtable in the right location. Huh? 2644 2645 */ 2646 callee = (Method*) rcvrKlass->start_of_vtable()[ cache->f2_as_index()]; 2647 // Profile virtual call. 2648 BI_PROFILE_UPDATE_VIRTUALCALL(rcvr->klass()); 2649 } 2650 } else { 2651 if ((Bytecodes::Code)opcode == Bytecodes::_invokespecial) { 2652 CHECK_NULL(STACK_OBJECT(-(cache->parameter_size()))); 2653 } 2654 callee = cache->f1_as_method(); 2655 2656 // Profile call. 2657 BI_PROFILE_UPDATE_CALL(); 2658 } 2659 2660 istate->set_callee(callee); 2661 istate->set_callee_entry_point(callee->from_interpreted_entry()); 2662 #ifdef VM_JVMTI 2663 if (JvmtiExport::can_post_interpreter_events() && THREAD->is_interp_only_mode()) { 2664 istate->set_callee_entry_point(callee->interpreter_entry()); 2665 } 2666 #endif /* VM_JVMTI */ 2667 istate->set_bcp_advance(3); 2668 UPDATE_PC_AND_RETURN(0); // I'll be back... 2669 } 2670 } 2671 2672 /* Allocate memory for a new java object. */ 2673 2674 CASE(_newarray): { 2675 BasicType atype = (BasicType) *(pc+1); 2676 jint size = STACK_INT(-1); 2677 CALL_VM(InterpreterRuntime::newarray(THREAD, atype, size), 2678 handle_exception); 2679 // Must prevent reordering of stores for object initialization 2680 // with stores that publish the new object. 2681 OrderAccess::storestore(); 2682 SET_STACK_OBJECT(THREAD->vm_result(), -1); 2683 THREAD->set_vm_result(NULL); 2684 2685 UPDATE_PC_AND_CONTINUE(2); 2686 } 2687 2688 /* Throw an exception. */ 2689 2690 CASE(_athrow): { 2691 oop except_oop = STACK_OBJECT(-1); 2692 CHECK_NULL(except_oop); 2693 // set pending_exception so we use common code 2694 THREAD->set_pending_exception(except_oop, NULL, 0); 2695 goto handle_exception; 2696 } 2697 2698 /* goto and jsr. They are exactly the same except jsr pushes 2699 * the address of the next instruction first. 2700 */ 2701 2702 CASE(_jsr): { 2703 /* push bytecode index on stack */ 2704 SET_STACK_ADDR(((address)pc - (intptr_t)(istate->method()->code_base()) + 3), 0); 2705 MORE_STACK(1); 2706 /* FALL THROUGH */ 2707 } 2708 2709 CASE(_goto): 2710 { 2711 int16_t offset = (int16_t)Bytes::get_Java_u2(pc + 1); 2712 // Profile jump. 2713 BI_PROFILE_UPDATE_JUMP(); 2714 address branch_pc = pc; 2715 UPDATE_PC(offset); 2716 DO_BACKEDGE_CHECKS(offset, branch_pc); 2717 CONTINUE; 2718 } 2719 2720 CASE(_jsr_w): { 2721 /* push return address on the stack */ 2722 SET_STACK_ADDR(((address)pc - (intptr_t)(istate->method()->code_base()) + 5), 0); 2723 MORE_STACK(1); 2724 /* FALL THROUGH */ 2725 } 2726 2727 CASE(_goto_w): 2728 { 2729 int32_t offset = Bytes::get_Java_u4(pc + 1); 2730 // Profile jump. 2731 BI_PROFILE_UPDATE_JUMP(); 2732 address branch_pc = pc; 2733 UPDATE_PC(offset); 2734 DO_BACKEDGE_CHECKS(offset, branch_pc); 2735 CONTINUE; 2736 } 2737 2738 /* return from a jsr or jsr_w */ 2739 2740 CASE(_ret): { 2741 // Profile ret. 2742 BI_PROFILE_UPDATE_RET(/*bci=*/((int)(intptr_t)(LOCALS_ADDR(pc[1])))); 2743 // Now, update the pc. 2744 pc = istate->method()->code_base() + (intptr_t)(LOCALS_ADDR(pc[1])); 2745 UPDATE_PC_AND_CONTINUE(0); 2746 } 2747 2748 /* debugger breakpoint */ 2749 2750 CASE(_breakpoint): { 2751 Bytecodes::Code original_bytecode; 2752 DECACHE_STATE(); 2753 SET_LAST_JAVA_FRAME(); 2754 original_bytecode = InterpreterRuntime::get_original_bytecode_at(THREAD, 2755 METHOD, pc); 2756 RESET_LAST_JAVA_FRAME(); 2757 CACHE_STATE(); 2758 if (THREAD->has_pending_exception()) goto handle_exception; 2759 CALL_VM(InterpreterRuntime::_breakpoint(THREAD, METHOD, pc), 2760 handle_exception); 2761 2762 opcode = (jubyte)original_bytecode; 2763 goto opcode_switch; 2764 } 2765 2766 DEFAULT: 2767 fatal(err_msg("Unimplemented opcode %d = %s", opcode, 2768 Bytecodes::name((Bytecodes::Code)opcode))); 2769 goto finish; 2770 2771 } /* switch(opc) */ 2772 2773 2774 #ifdef USELABELS 2775 check_for_exception: 2776 #endif 2777 { 2778 if (!THREAD->has_pending_exception()) { 2779 CONTINUE; 2780 } 2781 /* We will be gcsafe soon, so flush our state. */ 2782 DECACHE_PC(); 2783 goto handle_exception; 2784 } 2785 do_continue: ; 2786 2787 } /* while (1) interpreter loop */ 2788 2789 2790 // An exception exists in the thread state see whether this activation can handle it 2791 handle_exception: { 2792 2793 HandleMarkCleaner __hmc(THREAD); 2794 Handle except_oop(THREAD, THREAD->pending_exception()); 2795 // Prevent any subsequent HandleMarkCleaner in the VM 2796 // from freeing the except_oop handle. 2797 HandleMark __hm(THREAD); 2798 2799 THREAD->clear_pending_exception(); 2800 assert(except_oop(), "No exception to process"); 2801 intptr_t continuation_bci; 2802 // expression stack is emptied 2803 topOfStack = istate->stack_base() - Interpreter::stackElementWords; 2804 CALL_VM(continuation_bci = (intptr_t)InterpreterRuntime::exception_handler_for_exception(THREAD, except_oop()), 2805 handle_exception); 2806 2807 except_oop = THREAD->vm_result(); 2808 THREAD->set_vm_result(NULL); 2809 if (continuation_bci >= 0) { 2810 // Place exception on top of stack 2811 SET_STACK_OBJECT(except_oop(), 0); 2812 MORE_STACK(1); 2813 pc = METHOD->code_base() + continuation_bci; 2814 if (TraceExceptions) { 2815 ttyLocker ttyl; 2816 ResourceMark rm; 2817 tty->print_cr("Exception <%s> (" INTPTR_FORMAT ")", except_oop->print_value_string(), (void*)except_oop()); 2818 tty->print_cr(" thrown in interpreter method <%s>", METHOD->print_value_string()); 2819 tty->print_cr(" at bci %d, continuing at %d for thread " INTPTR_FORMAT, 2820 istate->bcp() - (intptr_t)METHOD->code_base(), 2821 continuation_bci, THREAD); 2822 } 2823 // for AbortVMOnException flag 2824 NOT_PRODUCT(Exceptions::debug_check_abort(except_oop)); 2825 2826 // Update profiling data. 2827 BI_PROFILE_ALIGN_TO_CURRENT_BCI(); 2828 goto run; 2829 } 2830 if (TraceExceptions) { 2831 ttyLocker ttyl; 2832 ResourceMark rm; 2833 tty->print_cr("Exception <%s> (" INTPTR_FORMAT ")", except_oop->print_value_string(), (void*)except_oop()); 2834 tty->print_cr(" thrown in interpreter method <%s>", METHOD->print_value_string()); 2835 tty->print_cr(" at bci %d, unwinding for thread " INTPTR_FORMAT, 2836 istate->bcp() - (intptr_t)METHOD->code_base(), 2837 THREAD); 2838 } 2839 // for AbortVMOnException flag 2840 NOT_PRODUCT(Exceptions::debug_check_abort(except_oop)); 2841 // No handler in this activation, unwind and try again 2842 THREAD->set_pending_exception(except_oop(), NULL, 0); 2843 goto handle_return; 2844 } // handle_exception: 2845 2846 // Return from an interpreter invocation with the result of the interpretation 2847 // on the top of the Java Stack (or a pending exception) 2848 2849 handle_Pop_Frame: { 2850 2851 // We don't really do anything special here except we must be aware 2852 // that we can get here without ever locking the method (if sync). 2853 // Also we skip the notification of the exit. 2854 2855 istate->set_msg(popping_frame); 2856 // Clear pending so while the pop is in process 2857 // we don't start another one if a call_vm is done. 2858 THREAD->clr_pop_frame_pending(); 2859 // Let interpreter (only) see the we're in the process of popping a frame 2860 THREAD->set_pop_frame_in_process(); 2861 2862 goto handle_return; 2863 2864 } // handle_Pop_Frame 2865 2866 // ForceEarlyReturn ends a method, and returns to the caller with a return value 2867 // given by the invoker of the early return. 2868 handle_Early_Return: { 2869 2870 istate->set_msg(early_return); 2871 2872 // Clear expression stack. 2873 topOfStack = istate->stack_base() - Interpreter::stackElementWords; 2874 2875 JvmtiThreadState *ts = THREAD->jvmti_thread_state(); 2876 2877 // Push the value to be returned. 2878 switch (istate->method()->result_type()) { 2879 case T_BOOLEAN: 2880 case T_SHORT: 2881 case T_BYTE: 2882 case T_CHAR: 2883 case T_INT: 2884 SET_STACK_INT(ts->earlyret_value().i, 0); 2885 MORE_STACK(1); 2886 break; 2887 case T_LONG: 2888 SET_STACK_LONG(ts->earlyret_value().j, 1); 2889 MORE_STACK(2); 2890 break; 2891 case T_FLOAT: 2892 SET_STACK_FLOAT(ts->earlyret_value().f, 0); 2893 MORE_STACK(1); 2894 break; 2895 case T_DOUBLE: 2896 SET_STACK_DOUBLE(ts->earlyret_value().d, 1); 2897 MORE_STACK(2); 2898 break; 2899 case T_ARRAY: 2900 case T_OBJECT: 2901 SET_STACK_OBJECT(ts->earlyret_oop(), 0); 2902 MORE_STACK(1); 2903 break; 2904 } 2905 2906 ts->clr_earlyret_value(); 2907 ts->set_earlyret_oop(NULL); 2908 ts->clr_earlyret_pending(); 2909 2910 // Fall through to handle_return. 2911 2912 } // handle_Early_Return 2913 2914 handle_return: { 2915 // A storestore barrier is required to order initialization of 2916 // final fields with publishing the reference to the object that 2917 // holds the field. Without the barrier the value of final fields 2918 // can be observed to change. 2919 OrderAccess::storestore(); 2920 2921 DECACHE_STATE(); 2922 2923 bool suppress_error = istate->msg() == popping_frame || istate->msg() == early_return; 2924 bool suppress_exit_event = THREAD->has_pending_exception() || istate->msg() == popping_frame; 2925 Handle original_exception(THREAD, THREAD->pending_exception()); 2926 Handle illegal_state_oop(THREAD, NULL); 2927 2928 // We'd like a HandleMark here to prevent any subsequent HandleMarkCleaner 2929 // in any following VM entries from freeing our live handles, but illegal_state_oop 2930 // isn't really allocated yet and so doesn't become live until later and 2931 // in unpredicatable places. Instead we must protect the places where we enter the 2932 // VM. It would be much simpler (and safer) if we could allocate a real handle with 2933 // a NULL oop in it and then overwrite the oop later as needed. This isn't 2934 // unfortunately isn't possible. 2935 2936 THREAD->clear_pending_exception(); 2937 2938 // 2939 // As far as we are concerned we have returned. If we have a pending exception 2940 // that will be returned as this invocation's result. However if we get any 2941 // exception(s) while checking monitor state one of those IllegalMonitorStateExceptions 2942 // will be our final result (i.e. monitor exception trumps a pending exception). 2943 // 2944 2945 // If we never locked the method (or really passed the point where we would have), 2946 // there is no need to unlock it (or look for other monitors), since that 2947 // could not have happened. 2948 2949 if (THREAD->do_not_unlock()) { 2950 2951 // Never locked, reset the flag now because obviously any caller must 2952 // have passed their point of locking for us to have gotten here. 2953 2954 THREAD->clr_do_not_unlock(); 2955 } else { 2956 // At this point we consider that we have returned. We now check that the 2957 // locks were properly block structured. If we find that they were not 2958 // used properly we will return with an illegal monitor exception. 2959 // The exception is checked by the caller not the callee since this 2960 // checking is considered to be part of the invocation and therefore 2961 // in the callers scope (JVM spec 8.13). 2962 // 2963 // Another weird thing to watch for is if the method was locked 2964 // recursively and then not exited properly. This means we must 2965 // examine all the entries in reverse time(and stack) order and 2966 // unlock as we find them. If we find the method monitor before 2967 // we are at the initial entry then we should throw an exception. 2968 // It is not clear the template based interpreter does this 2969 // correctly 2970 2971 BasicObjectLock* base = istate->monitor_base(); 2972 BasicObjectLock* end = (BasicObjectLock*) istate->stack_base(); 2973 bool method_unlock_needed = METHOD->is_synchronized(); 2974 // We know the initial monitor was used for the method don't check that 2975 // slot in the loop 2976 if (method_unlock_needed) base--; 2977 2978 // Check all the monitors to see they are unlocked. Install exception if found to be locked. 2979 while (end < base) { 2980 oop lockee = end->obj(); 2981 if (lockee != NULL) { 2982 BasicLock* lock = end->lock(); 2983 markOop header = lock->displaced_header(); 2984 end->set_obj(NULL); 2985 2986 if (!lockee->mark()->has_bias_pattern()) { 2987 // If it isn't recursive we either must swap old header or call the runtime 2988 if (header != NULL) { 2989 if (Atomic::cmpxchg_ptr(header, lockee->mark_addr(), lock) != lock) { 2990 // restore object for the slow case 2991 end->set_obj(lockee); 2992 { 2993 // Prevent any HandleMarkCleaner from freeing our live handles 2994 HandleMark __hm(THREAD); 2995 CALL_VM_NOCHECK(InterpreterRuntime::monitorexit(THREAD, end)); 2996 } 2997 } 2998 } 2999 } 3000 // One error is plenty 3001 if (illegal_state_oop() == NULL && !suppress_error) { 3002 { 3003 // Prevent any HandleMarkCleaner from freeing our live handles 3004 HandleMark __hm(THREAD); 3005 CALL_VM_NOCHECK(InterpreterRuntime::throw_illegal_monitor_state_exception(THREAD)); 3006 } 3007 assert(THREAD->has_pending_exception(), "Lost our exception!"); 3008 illegal_state_oop = THREAD->pending_exception(); 3009 THREAD->clear_pending_exception(); 3010 } 3011 } 3012 end++; 3013 } 3014 // Unlock the method if needed 3015 if (method_unlock_needed) { 3016 if (base->obj() == NULL) { 3017 // The method is already unlocked this is not good. 3018 if (illegal_state_oop() == NULL && !suppress_error) { 3019 { 3020 // Prevent any HandleMarkCleaner from freeing our live handles 3021 HandleMark __hm(THREAD); 3022 CALL_VM_NOCHECK(InterpreterRuntime::throw_illegal_monitor_state_exception(THREAD)); 3023 } 3024 assert(THREAD->has_pending_exception(), "Lost our exception!"); 3025 illegal_state_oop = THREAD->pending_exception(); 3026 THREAD->clear_pending_exception(); 3027 } 3028 } else { 3029 // 3030 // The initial monitor is always used for the method 3031 // However if that slot is no longer the oop for the method it was unlocked 3032 // and reused by something that wasn't unlocked! 3033 // 3034 // deopt can come in with rcvr dead because c2 knows 3035 // its value is preserved in the monitor. So we can't use locals[0] at all 3036 // and must use first monitor slot. 3037 // 3038 oop rcvr = base->obj(); 3039 if (rcvr == NULL) { 3040 if (!suppress_error) { 3041 VM_JAVA_ERROR_NO_JUMP(vmSymbols::java_lang_NullPointerException(), "", note_nullCheck_trap); 3042 illegal_state_oop = THREAD->pending_exception(); 3043 THREAD->clear_pending_exception(); 3044 } 3045 } else if (UseHeavyMonitors) { 3046 { 3047 // Prevent any HandleMarkCleaner from freeing our live handles. 3048 HandleMark __hm(THREAD); 3049 CALL_VM_NOCHECK(InterpreterRuntime::monitorexit(THREAD, base)); 3050 } 3051 if (THREAD->has_pending_exception()) { 3052 if (!suppress_error) illegal_state_oop = THREAD->pending_exception(); 3053 THREAD->clear_pending_exception(); 3054 } 3055 } else { 3056 BasicLock* lock = base->lock(); 3057 markOop header = lock->displaced_header(); 3058 base->set_obj(NULL); 3059 3060 if (!rcvr->mark()->has_bias_pattern()) { 3061 base->set_obj(NULL); 3062 // If it isn't recursive we either must swap old header or call the runtime 3063 if (header != NULL) { 3064 if (Atomic::cmpxchg_ptr(header, rcvr->mark_addr(), lock) != lock) { 3065 // restore object for the slow case 3066 base->set_obj(rcvr); 3067 { 3068 // Prevent any HandleMarkCleaner from freeing our live handles 3069 HandleMark __hm(THREAD); 3070 CALL_VM_NOCHECK(InterpreterRuntime::monitorexit(THREAD, base)); 3071 } 3072 if (THREAD->has_pending_exception()) { 3073 if (!suppress_error) illegal_state_oop = THREAD->pending_exception(); 3074 THREAD->clear_pending_exception(); 3075 } 3076 } 3077 } 3078 } 3079 } 3080 } 3081 } 3082 } 3083 // Clear the do_not_unlock flag now. 3084 THREAD->clr_do_not_unlock(); 3085 3086 // 3087 // Notify jvmti/jvmdi 3088 // 3089 // NOTE: we do not notify a method_exit if we have a pending exception, 3090 // including an exception we generate for unlocking checks. In the former 3091 // case, JVMDI has already been notified by our call for the exception handler 3092 // and in both cases as far as JVMDI is concerned we have already returned. 3093 // If we notify it again JVMDI will be all confused about how many frames 3094 // are still on the stack (4340444). 3095 // 3096 // NOTE Further! It turns out the the JVMTI spec in fact expects to see 3097 // method_exit events whenever we leave an activation unless it was done 3098 // for popframe. This is nothing like jvmdi. However we are passing the 3099 // tests at the moment (apparently because they are jvmdi based) so rather 3100 // than change this code and possibly fail tests we will leave it alone 3101 // (with this note) in anticipation of changing the vm and the tests 3102 // simultaneously. 3103 3104 3105 // 3106 suppress_exit_event = suppress_exit_event || illegal_state_oop() != NULL; 3107 3108 3109 3110 #ifdef VM_JVMTI 3111 if (_jvmti_interp_events) { 3112 // Whenever JVMTI puts a thread in interp_only_mode, method 3113 // entry/exit events are sent for that thread to track stack depth. 3114 if ( !suppress_exit_event && THREAD->is_interp_only_mode() ) { 3115 { 3116 // Prevent any HandleMarkCleaner from freeing our live handles 3117 HandleMark __hm(THREAD); 3118 CALL_VM_NOCHECK(InterpreterRuntime::post_method_exit(THREAD)); 3119 } 3120 } 3121 } 3122 #endif /* VM_JVMTI */ 3123 3124 // 3125 // See if we are returning any exception 3126 // A pending exception that was pending prior to a possible popping frame 3127 // overrides the popping frame. 3128 // 3129 assert(!suppress_error || (suppress_error && illegal_state_oop() == NULL), "Error was not suppressed"); 3130 if (illegal_state_oop() != NULL || original_exception() != NULL) { 3131 // Inform the frame manager we have no result. 3132 istate->set_msg(throwing_exception); 3133 if (illegal_state_oop() != NULL) 3134 THREAD->set_pending_exception(illegal_state_oop(), NULL, 0); 3135 else 3136 THREAD->set_pending_exception(original_exception(), NULL, 0); 3137 UPDATE_PC_AND_RETURN(0); 3138 } 3139 3140 if (istate->msg() == popping_frame) { 3141 // Make it simpler on the assembly code and set the message for the frame pop. 3142 // returns 3143 if (istate->prev() == NULL) { 3144 // We must be returning to a deoptimized frame (because popframe only happens between 3145 // two interpreted frames). We need to save the current arguments in C heap so that 3146 // the deoptimized frame when it restarts can copy the arguments to its expression 3147 // stack and re-execute the call. We also have to notify deoptimization that this 3148 // has occurred and to pick the preserved args copy them to the deoptimized frame's 3149 // java expression stack. Yuck. 3150 // 3151 THREAD->popframe_preserve_args(in_ByteSize(METHOD->size_of_parameters() * wordSize), 3152 LOCALS_SLOT(METHOD->size_of_parameters() - 1)); 3153 THREAD->set_popframe_condition_bit(JavaThread::popframe_force_deopt_reexecution_bit); 3154 } 3155 } else { 3156 istate->set_msg(return_from_method); 3157 } 3158 3159 // Normal return 3160 // Advance the pc and return to frame manager 3161 UPDATE_PC_AND_RETURN(1); 3162 } /* handle_return: */ 3163 3164 // This is really a fatal error return 3165 3166 finish: 3167 DECACHE_TOS(); 3168 DECACHE_PC(); 3169 3170 return; 3171 } 3172 3173 /* 3174 * All the code following this point is only produced once and is not present 3175 * in the JVMTI version of the interpreter 3176 */ 3177 3178 #ifndef VM_JVMTI 3179 3180 // This constructor should only be used to contruct the object to signal 3181 // interpreter initialization. All other instances should be created by 3182 // the frame manager. 3183 BytecodeInterpreter::BytecodeInterpreter(messages msg) { 3184 if (msg != initialize) ShouldNotReachHere(); 3185 _msg = msg; 3186 _self_link = this; 3187 _prev_link = NULL; 3188 } 3189 3190 // Inline static functions for Java Stack and Local manipulation 3191 3192 // The implementations are platform dependent. We have to worry about alignment 3193 // issues on some machines which can change on the same platform depending on 3194 // whether it is an LP64 machine also. 3195 address BytecodeInterpreter::stack_slot(intptr_t *tos, int offset) { 3196 return (address) tos[Interpreter::expr_index_at(-offset)]; 3197 } 3198 3199 jint BytecodeInterpreter::stack_int(intptr_t *tos, int offset) { 3200 return *((jint*) &tos[Interpreter::expr_index_at(-offset)]); 3201 } 3202 3203 jfloat BytecodeInterpreter::stack_float(intptr_t *tos, int offset) { 3204 return *((jfloat *) &tos[Interpreter::expr_index_at(-offset)]); 3205 } 3206 3207 oop BytecodeInterpreter::stack_object(intptr_t *tos, int offset) { 3208 return cast_to_oop(tos [Interpreter::expr_index_at(-offset)]); 3209 } 3210 3211 jdouble BytecodeInterpreter::stack_double(intptr_t *tos, int offset) { 3212 return ((VMJavaVal64*) &tos[Interpreter::expr_index_at(-offset)])->d; 3213 } 3214 3215 jlong BytecodeInterpreter::stack_long(intptr_t *tos, int offset) { 3216 return ((VMJavaVal64 *) &tos[Interpreter::expr_index_at(-offset)])->l; 3217 } 3218 3219 // only used for value types 3220 void BytecodeInterpreter::set_stack_slot(intptr_t *tos, address value, 3221 int offset) { 3222 *((address *)&tos[Interpreter::expr_index_at(-offset)]) = value; 3223 } 3224 3225 void BytecodeInterpreter::set_stack_int(intptr_t *tos, int value, 3226 int offset) { 3227 *((jint *)&tos[Interpreter::expr_index_at(-offset)]) = value; 3228 } 3229 3230 void BytecodeInterpreter::set_stack_float(intptr_t *tos, jfloat value, 3231 int offset) { 3232 *((jfloat *)&tos[Interpreter::expr_index_at(-offset)]) = value; 3233 } 3234 3235 void BytecodeInterpreter::set_stack_object(intptr_t *tos, oop value, 3236 int offset) { 3237 *((oop *)&tos[Interpreter::expr_index_at(-offset)]) = value; 3238 } 3239 3240 // needs to be platform dep for the 32 bit platforms. 3241 void BytecodeInterpreter::set_stack_double(intptr_t *tos, jdouble value, 3242 int offset) { 3243 ((VMJavaVal64*)&tos[Interpreter::expr_index_at(-offset)])->d = value; 3244 } 3245 3246 void BytecodeInterpreter::set_stack_double_from_addr(intptr_t *tos, 3247 address addr, int offset) { 3248 (((VMJavaVal64*)&tos[Interpreter::expr_index_at(-offset)])->d = 3249 ((VMJavaVal64*)addr)->d); 3250 } 3251 3252 void BytecodeInterpreter::set_stack_long(intptr_t *tos, jlong value, 3253 int offset) { 3254 ((VMJavaVal64*)&tos[Interpreter::expr_index_at(-offset+1)])->l = 0xdeedbeeb; 3255 ((VMJavaVal64*)&tos[Interpreter::expr_index_at(-offset)])->l = value; 3256 } 3257 3258 void BytecodeInterpreter::set_stack_long_from_addr(intptr_t *tos, 3259 address addr, int offset) { 3260 ((VMJavaVal64*)&tos[Interpreter::expr_index_at(-offset+1)])->l = 0xdeedbeeb; 3261 ((VMJavaVal64*)&tos[Interpreter::expr_index_at(-offset)])->l = 3262 ((VMJavaVal64*)addr)->l; 3263 } 3264 3265 // Locals 3266 3267 address BytecodeInterpreter::locals_slot(intptr_t* locals, int offset) { 3268 return (address)locals[Interpreter::local_index_at(-offset)]; 3269 } 3270 jint BytecodeInterpreter::locals_int(intptr_t* locals, int offset) { 3271 return (jint)locals[Interpreter::local_index_at(-offset)]; 3272 } 3273 jfloat BytecodeInterpreter::locals_float(intptr_t* locals, int offset) { 3274 return (jfloat)locals[Interpreter::local_index_at(-offset)]; 3275 } 3276 oop BytecodeInterpreter::locals_object(intptr_t* locals, int offset) { 3277 return cast_to_oop(locals[Interpreter::local_index_at(-offset)]); 3278 } 3279 jdouble BytecodeInterpreter::locals_double(intptr_t* locals, int offset) { 3280 return ((VMJavaVal64*)&locals[Interpreter::local_index_at(-(offset+1))])->d; 3281 } 3282 jlong BytecodeInterpreter::locals_long(intptr_t* locals, int offset) { 3283 return ((VMJavaVal64*)&locals[Interpreter::local_index_at(-(offset+1))])->l; 3284 } 3285 3286 // Returns the address of locals value. 3287 address BytecodeInterpreter::locals_long_at(intptr_t* locals, int offset) { 3288 return ((address)&locals[Interpreter::local_index_at(-(offset+1))]); 3289 } 3290 address BytecodeInterpreter::locals_double_at(intptr_t* locals, int offset) { 3291 return ((address)&locals[Interpreter::local_index_at(-(offset+1))]); 3292 } 3293 3294 // Used for local value or returnAddress 3295 void BytecodeInterpreter::set_locals_slot(intptr_t *locals, 3296 address value, int offset) { 3297 *((address*)&locals[Interpreter::local_index_at(-offset)]) = value; 3298 } 3299 void BytecodeInterpreter::set_locals_int(intptr_t *locals, 3300 jint value, int offset) { 3301 *((jint *)&locals[Interpreter::local_index_at(-offset)]) = value; 3302 } 3303 void BytecodeInterpreter::set_locals_float(intptr_t *locals, 3304 jfloat value, int offset) { 3305 *((jfloat *)&locals[Interpreter::local_index_at(-offset)]) = value; 3306 } 3307 void BytecodeInterpreter::set_locals_object(intptr_t *locals, 3308 oop value, int offset) { 3309 *((oop *)&locals[Interpreter::local_index_at(-offset)]) = value; 3310 } 3311 void BytecodeInterpreter::set_locals_double(intptr_t *locals, 3312 jdouble value, int offset) { 3313 ((VMJavaVal64*)&locals[Interpreter::local_index_at(-(offset+1))])->d = value; 3314 } 3315 void BytecodeInterpreter::set_locals_long(intptr_t *locals, 3316 jlong value, int offset) { 3317 ((VMJavaVal64*)&locals[Interpreter::local_index_at(-(offset+1))])->l = value; 3318 } 3319 void BytecodeInterpreter::set_locals_double_from_addr(intptr_t *locals, 3320 address addr, int offset) { 3321 ((VMJavaVal64*)&locals[Interpreter::local_index_at(-(offset+1))])->d = ((VMJavaVal64*)addr)->d; 3322 } 3323 void BytecodeInterpreter::set_locals_long_from_addr(intptr_t *locals, 3324 address addr, int offset) { 3325 ((VMJavaVal64*)&locals[Interpreter::local_index_at(-(offset+1))])->l = ((VMJavaVal64*)addr)->l; 3326 } 3327 3328 void BytecodeInterpreter::astore(intptr_t* tos, int stack_offset, 3329 intptr_t* locals, int locals_offset) { 3330 intptr_t value = tos[Interpreter::expr_index_at(-stack_offset)]; 3331 locals[Interpreter::local_index_at(-locals_offset)] = value; 3332 } 3333 3334 3335 void BytecodeInterpreter::copy_stack_slot(intptr_t *tos, int from_offset, 3336 int to_offset) { 3337 tos[Interpreter::expr_index_at(-to_offset)] = 3338 (intptr_t)tos[Interpreter::expr_index_at(-from_offset)]; 3339 } 3340 3341 void BytecodeInterpreter::dup(intptr_t *tos) { 3342 copy_stack_slot(tos, -1, 0); 3343 } 3344 void BytecodeInterpreter::dup2(intptr_t *tos) { 3345 copy_stack_slot(tos, -2, 0); 3346 copy_stack_slot(tos, -1, 1); 3347 } 3348 3349 void BytecodeInterpreter::dup_x1(intptr_t *tos) { 3350 /* insert top word two down */ 3351 copy_stack_slot(tos, -1, 0); 3352 copy_stack_slot(tos, -2, -1); 3353 copy_stack_slot(tos, 0, -2); 3354 } 3355 3356 void BytecodeInterpreter::dup_x2(intptr_t *tos) { 3357 /* insert top word three down */ 3358 copy_stack_slot(tos, -1, 0); 3359 copy_stack_slot(tos, -2, -1); 3360 copy_stack_slot(tos, -3, -2); 3361 copy_stack_slot(tos, 0, -3); 3362 } 3363 void BytecodeInterpreter::dup2_x1(intptr_t *tos) { 3364 /* insert top 2 slots three down */ 3365 copy_stack_slot(tos, -1, 1); 3366 copy_stack_slot(tos, -2, 0); 3367 copy_stack_slot(tos, -3, -1); 3368 copy_stack_slot(tos, 1, -2); 3369 copy_stack_slot(tos, 0, -3); 3370 } 3371 void BytecodeInterpreter::dup2_x2(intptr_t *tos) { 3372 /* insert top 2 slots four down */ 3373 copy_stack_slot(tos, -1, 1); 3374 copy_stack_slot(tos, -2, 0); 3375 copy_stack_slot(tos, -3, -1); 3376 copy_stack_slot(tos, -4, -2); 3377 copy_stack_slot(tos, 1, -3); 3378 copy_stack_slot(tos, 0, -4); 3379 } 3380 3381 3382 void BytecodeInterpreter::swap(intptr_t *tos) { 3383 // swap top two elements 3384 intptr_t val = tos[Interpreter::expr_index_at(1)]; 3385 // Copy -2 entry to -1 3386 copy_stack_slot(tos, -2, -1); 3387 // Store saved -1 entry into -2 3388 tos[Interpreter::expr_index_at(2)] = val; 3389 } 3390 // -------------------------------------------------------------------------------- 3391 // Non-product code 3392 #ifndef PRODUCT 3393 3394 const char* BytecodeInterpreter::C_msg(BytecodeInterpreter::messages msg) { 3395 switch (msg) { 3396 case BytecodeInterpreter::no_request: return("no_request"); 3397 case BytecodeInterpreter::initialize: return("initialize"); 3398 // status message to C++ interpreter 3399 case BytecodeInterpreter::method_entry: return("method_entry"); 3400 case BytecodeInterpreter::method_resume: return("method_resume"); 3401 case BytecodeInterpreter::got_monitors: return("got_monitors"); 3402 case BytecodeInterpreter::rethrow_exception: return("rethrow_exception"); 3403 // requests to frame manager from C++ interpreter 3404 case BytecodeInterpreter::call_method: return("call_method"); 3405 case BytecodeInterpreter::return_from_method: return("return_from_method"); 3406 case BytecodeInterpreter::more_monitors: return("more_monitors"); 3407 case BytecodeInterpreter::throwing_exception: return("throwing_exception"); 3408 case BytecodeInterpreter::popping_frame: return("popping_frame"); 3409 case BytecodeInterpreter::do_osr: return("do_osr"); 3410 // deopt 3411 case BytecodeInterpreter::deopt_resume: return("deopt_resume"); 3412 case BytecodeInterpreter::deopt_resume2: return("deopt_resume2"); 3413 default: return("BAD MSG"); 3414 } 3415 } 3416 void 3417 BytecodeInterpreter::print() { 3418 tty->print_cr("thread: " INTPTR_FORMAT, (uintptr_t) this->_thread); 3419 tty->print_cr("bcp: " INTPTR_FORMAT, (uintptr_t) this->_bcp); 3420 tty->print_cr("locals: " INTPTR_FORMAT, (uintptr_t) this->_locals); 3421 tty->print_cr("constants: " INTPTR_FORMAT, (uintptr_t) this->_constants); 3422 { 3423 ResourceMark rm; 3424 char *method_name = _method->name_and_sig_as_C_string(); 3425 tty->print_cr("method: " INTPTR_FORMAT "[ %s ]", (uintptr_t) this->_method, method_name); 3426 } 3427 tty->print_cr("mdx: " INTPTR_FORMAT, (uintptr_t) this->_mdx); 3428 tty->print_cr("stack: " INTPTR_FORMAT, (uintptr_t) this->_stack); 3429 tty->print_cr("msg: %s", C_msg(this->_msg)); 3430 tty->print_cr("result_to_call._callee: " INTPTR_FORMAT, (uintptr_t) this->_result._to_call._callee); 3431 tty->print_cr("result_to_call._callee_entry_point: " INTPTR_FORMAT, (uintptr_t) this->_result._to_call._callee_entry_point); 3432 tty->print_cr("result_to_call._bcp_advance: %d ", this->_result._to_call._bcp_advance); 3433 tty->print_cr("osr._osr_buf: " INTPTR_FORMAT, (uintptr_t) this->_result._osr._osr_buf); 3434 tty->print_cr("osr._osr_entry: " INTPTR_FORMAT, (uintptr_t) this->_result._osr._osr_entry); 3435 tty->print_cr("prev_link: " INTPTR_FORMAT, (uintptr_t) this->_prev_link); 3436 tty->print_cr("native_mirror: " INTPTR_FORMAT, (void*) this->_oop_temp); 3437 tty->print_cr("stack_base: " INTPTR_FORMAT, (uintptr_t) this->_stack_base); 3438 tty->print_cr("stack_limit: " INTPTR_FORMAT, (uintptr_t) this->_stack_limit); 3439 tty->print_cr("monitor_base: " INTPTR_FORMAT, (uintptr_t) this->_monitor_base); 3440 #ifdef SPARC 3441 tty->print_cr("last_Java_pc: " INTPTR_FORMAT, (uintptr_t) this->_last_Java_pc); 3442 tty->print_cr("frame_bottom: " INTPTR_FORMAT, (uintptr_t) this->_frame_bottom); 3443 tty->print_cr("&native_fresult: " INTPTR_FORMAT, (uintptr_t) &this->_native_fresult); 3444 tty->print_cr("native_lresult: " INTPTR_FORMAT, (uintptr_t) this->_native_lresult); 3445 #endif 3446 #if !defined(ZERO) 3447 tty->print_cr("last_Java_fp: " INTPTR_FORMAT, (uintptr_t) this->_last_Java_fp); 3448 #endif // !ZERO 3449 tty->print_cr("self_link: " INTPTR_FORMAT, (uintptr_t) this->_self_link); 3450 } 3451 3452 extern "C" { 3453 void PI(uintptr_t arg) { 3454 ((BytecodeInterpreter*)arg)->print(); 3455 } 3456 } 3457 #endif // PRODUCT 3458 3459 #endif // JVMTI 3460 #endif // CC_INTERP