1 /* 2 * Copyright (c) 2002, 2012, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. 8 * 9 * This code is distributed in the hope that it will be useful, but WITHOUT 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 12 * version 2 for more details (a copy is included in the LICENSE file that 13 * accompanied this code). 14 * 15 * You should have received a copy of the GNU General Public License version 16 * 2 along with this work; if not, write to the Free Software Foundation, 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 18 * 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 20 * or visit www.oracle.com if you need additional information or have any 21 * questions. 22 * 23 */ 24 25 // 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/biasedLocking.hpp" 41 #include "runtime/frame.inline.hpp" 42 #include "runtime/handles.inline.hpp" 43 #include "runtime/interfaceSupport.hpp" 44 #include "runtime/sharedRuntime.hpp" 45 #include "runtime/threadCritical.hpp" 46 #include "utilities/exceptions.hpp" 47 #ifdef TARGET_OS_ARCH_linux_x86 48 # include "orderAccess_linux_x86.inline.hpp" 49 #endif 50 #ifdef TARGET_OS_ARCH_linux_sparc 51 # include "orderAccess_linux_sparc.inline.hpp" 52 #endif 53 #ifdef TARGET_OS_ARCH_linux_zero 54 # include "orderAccess_linux_zero.inline.hpp" 55 #endif 56 #ifdef TARGET_OS_ARCH_solaris_x86 57 # include "orderAccess_solaris_x86.inline.hpp" 58 #endif 59 #ifdef TARGET_OS_ARCH_solaris_sparc 60 # include "orderAccess_solaris_sparc.inline.hpp" 61 #endif 62 #ifdef TARGET_OS_ARCH_windows_x86 63 # include "orderAccess_windows_x86.inline.hpp" 64 #endif 65 #ifdef TARGET_OS_ARCH_linux_arm 66 # include "orderAccess_linux_arm.inline.hpp" 67 #endif 68 #ifdef TARGET_OS_ARCH_linux_ppc 69 # include "orderAccess_linux_ppc.inline.hpp" 70 #endif 71 #ifdef TARGET_OS_ARCH_aix_ppc 72 # include "orderAccess_aix_ppc.inline.hpp" 73 #endif 74 #ifdef TARGET_OS_ARCH_bsd_x86 75 # include "orderAccess_bsd_x86.inline.hpp" 76 #endif 77 #ifdef TARGET_OS_ARCH_bsd_zero 78 # include "orderAccess_bsd_zero.inline.hpp" 79 #endif 80 81 82 // no precompiled headers 83 #ifdef CC_INTERP 84 85 /* 86 * USELABELS - If using GCC, then use labels for the opcode dispatching 87 * rather -then a switch statement. This improves performance because it 88 * gives us the oportunity to have the instructions that calculate the 89 * next opcode to jump to be intermixed with the rest of the instructions 90 * that implement the opcode (see UPDATE_PC_AND_TOS_AND_CONTINUE macro). 91 */ 92 #undef USELABELS 93 #ifdef __GNUC__ 94 /* 95 ASSERT signifies debugging. It is much easier to step thru bytecodes if we 96 don't use the computed goto approach. 97 */ 98 #ifndef ASSERT 99 #define USELABELS 100 #endif 101 #endif 102 103 #undef CASE 104 #ifdef USELABELS 105 #define CASE(opcode) opc ## opcode 106 #define DEFAULT opc_default 107 #else 108 #define CASE(opcode) case Bytecodes:: opcode 109 #define DEFAULT default 110 #endif 111 112 /* 113 * PREFETCH_OPCCODE - Some compilers do better if you prefetch the next 114 * opcode before going back to the top of the while loop, rather then having 115 * the top of the while loop handle it. This provides a better opportunity 116 * for instruction scheduling. Some compilers just do this prefetch 117 * automatically. Some actually end up with worse performance if you 118 * force the prefetch. Solaris gcc seems to do better, but cc does worse. 119 */ 120 #undef PREFETCH_OPCCODE 121 #define PREFETCH_OPCCODE 122 123 /* 124 Interpreter safepoint: it is expected that the interpreter will have no live 125 handles of its own creation live at an interpreter safepoint. Therefore we 126 run a HandleMarkCleaner and trash all handles allocated in the call chain 127 since the JavaCalls::call_helper invocation that initiated the chain. 128 There really shouldn't be any handles remaining to trash but this is cheap 129 in relation to a safepoint. 130 */ 131 #define SAFEPOINT \ 132 if ( SafepointSynchronize::is_synchronizing()) { \ 133 { \ 134 /* zap freed handles rather than GC'ing them */ \ 135 HandleMarkCleaner __hmc(THREAD); \ 136 } \ 137 CALL_VM(SafepointSynchronize::block(THREAD), handle_exception); \ 138 } 139 140 /* 141 * VM_JAVA_ERROR - Macro for throwing a java exception from 142 * the interpreter loop. Should really be a CALL_VM but there 143 * is no entry point to do the transition to vm so we just 144 * do it by hand here. 145 */ 146 #define VM_JAVA_ERROR_NO_JUMP(name, msg, note_a_trap) \ 147 DECACHE_STATE(); \ 148 SET_LAST_JAVA_FRAME(); \ 149 { \ 150 InterpreterRuntime::note_a_trap(THREAD, istate->method(), BCI()); \ 151 ThreadInVMfromJava trans(THREAD); \ 152 Exceptions::_throw_msg(THREAD, __FILE__, __LINE__, name, msg); \ 153 } \ 154 RESET_LAST_JAVA_FRAME(); \ 155 CACHE_STATE(); 156 157 // Normal throw of a java error. 158 #define VM_JAVA_ERROR(name, msg, note_a_trap) \ 159 VM_JAVA_ERROR_NO_JUMP(name, msg, note_a_trap) \ 160 goto handle_exception; 161 162 #ifdef PRODUCT 163 #define DO_UPDATE_INSTRUCTION_COUNT(opcode) 164 #else 165 #define DO_UPDATE_INSTRUCTION_COUNT(opcode) \ 166 { \ 167 BytecodeCounter::_counter_value++; \ 168 BytecodeHistogram::_counters[(Bytecodes::Code)opcode]++; \ 169 if (StopInterpreterAt && StopInterpreterAt == BytecodeCounter::_counter_value) os::breakpoint(); \ 170 if (TraceBytecodes) { \ 171 CALL_VM((void)SharedRuntime::trace_bytecode(THREAD, 0, \ 172 topOfStack[Interpreter::expr_index_at(1)], \ 173 topOfStack[Interpreter::expr_index_at(2)]), \ 174 handle_exception); \ 175 } \ 176 } 177 #endif 178 179 #undef DEBUGGER_SINGLE_STEP_NOTIFY 180 #ifdef VM_JVMTI 181 /* NOTE: (kbr) This macro must be called AFTER the PC has been 182 incremented. JvmtiExport::at_single_stepping_point() may cause a 183 breakpoint opcode to get inserted at the current PC to allow the 184 debugger to coalesce single-step events. 185 186 As a result if we call at_single_stepping_point() we refetch opcode 187 to get the current opcode. This will override any other prefetching 188 that might have occurred. 189 */ 190 #define DEBUGGER_SINGLE_STEP_NOTIFY() \ 191 { \ 192 if (_jvmti_interp_events) { \ 193 if (JvmtiExport::should_post_single_step()) { \ 194 DECACHE_STATE(); \ 195 SET_LAST_JAVA_FRAME(); \ 196 ThreadInVMfromJava trans(THREAD); \ 197 JvmtiExport::at_single_stepping_point(THREAD, \ 198 istate->method(), \ 199 pc); \ 200 RESET_LAST_JAVA_FRAME(); \ 201 CACHE_STATE(); \ 202 if (THREAD->pop_frame_pending() && \ 203 !THREAD->pop_frame_in_process()) { \ 204 goto handle_Pop_Frame; \ 205 } \ 206 if (THREAD->jvmti_thread_state() && \ 207 THREAD->jvmti_thread_state()->is_earlyret_pending()) { \ 208 goto handle_Early_Return; \ 209 } \ 210 opcode = *pc; \ 211 } \ 212 } \ 213 } 214 #else 215 #define DEBUGGER_SINGLE_STEP_NOTIFY() 216 #endif 217 218 /* 219 * CONTINUE - Macro for executing the next opcode. 220 */ 221 #undef CONTINUE 222 #ifdef USELABELS 223 // Have to do this dispatch this way in C++ because otherwise gcc complains about crossing an 224 // initialization (which is is the initialization of the table pointer...) 225 #define DISPATCH(opcode) goto *(void*)dispatch_table[opcode] 226 #define CONTINUE { \ 227 opcode = *pc; \ 228 DO_UPDATE_INSTRUCTION_COUNT(opcode); \ 229 DEBUGGER_SINGLE_STEP_NOTIFY(); \ 230 DISPATCH(opcode); \ 231 } 232 #else 233 #ifdef PREFETCH_OPCCODE 234 #define CONTINUE { \ 235 opcode = *pc; \ 236 DO_UPDATE_INSTRUCTION_COUNT(opcode); \ 237 DEBUGGER_SINGLE_STEP_NOTIFY(); \ 238 continue; \ 239 } 240 #else 241 #define CONTINUE { \ 242 DO_UPDATE_INSTRUCTION_COUNT(opcode); \ 243 DEBUGGER_SINGLE_STEP_NOTIFY(); \ 244 continue; \ 245 } 246 #endif 247 #endif 248 249 250 #define UPDATE_PC(opsize) {pc += opsize; } 251 /* 252 * UPDATE_PC_AND_TOS - Macro for updating the pc and topOfStack. 253 */ 254 #undef UPDATE_PC_AND_TOS 255 #define UPDATE_PC_AND_TOS(opsize, stack) \ 256 {pc += opsize; MORE_STACK(stack); } 257 258 /* 259 * UPDATE_PC_AND_TOS_AND_CONTINUE - Macro for updating the pc and topOfStack, 260 * and executing the next opcode. It's somewhat similar to the combination 261 * of UPDATE_PC_AND_TOS and CONTINUE, but with some minor optimizations. 262 */ 263 #undef UPDATE_PC_AND_TOS_AND_CONTINUE 264 #ifdef USELABELS 265 #define UPDATE_PC_AND_TOS_AND_CONTINUE(opsize, stack) { \ 266 pc += opsize; opcode = *pc; MORE_STACK(stack); \ 267 DO_UPDATE_INSTRUCTION_COUNT(opcode); \ 268 DEBUGGER_SINGLE_STEP_NOTIFY(); \ 269 DISPATCH(opcode); \ 270 } 271 272 #define UPDATE_PC_AND_CONTINUE(opsize) { \ 273 pc += opsize; opcode = *pc; \ 274 DO_UPDATE_INSTRUCTION_COUNT(opcode); \ 275 DEBUGGER_SINGLE_STEP_NOTIFY(); \ 276 DISPATCH(opcode); \ 277 } 278 #else 279 #ifdef PREFETCH_OPCCODE 280 #define UPDATE_PC_AND_TOS_AND_CONTINUE(opsize, stack) { \ 281 pc += opsize; opcode = *pc; MORE_STACK(stack); \ 282 DO_UPDATE_INSTRUCTION_COUNT(opcode); \ 283 DEBUGGER_SINGLE_STEP_NOTIFY(); \ 284 goto do_continue; \ 285 } 286 287 #define UPDATE_PC_AND_CONTINUE(opsize) { \ 288 pc += opsize; opcode = *pc; \ 289 DO_UPDATE_INSTRUCTION_COUNT(opcode); \ 290 DEBUGGER_SINGLE_STEP_NOTIFY(); \ 291 goto do_continue; \ 292 } 293 #else 294 #define UPDATE_PC_AND_TOS_AND_CONTINUE(opsize, stack) { \ 295 pc += opsize; MORE_STACK(stack); \ 296 DO_UPDATE_INSTRUCTION_COUNT(opcode); \ 297 DEBUGGER_SINGLE_STEP_NOTIFY(); \ 298 goto do_continue; \ 299 } 300 301 #define UPDATE_PC_AND_CONTINUE(opsize) { \ 302 pc += opsize; \ 303 DO_UPDATE_INSTRUCTION_COUNT(opcode); \ 304 DEBUGGER_SINGLE_STEP_NOTIFY(); \ 305 goto do_continue; \ 306 } 307 #endif /* PREFETCH_OPCCODE */ 308 #endif /* USELABELS */ 309 310 // About to call a new method, update the save the adjusted pc and return to frame manager 311 #define UPDATE_PC_AND_RETURN(opsize) \ 312 DECACHE_TOS(); \ 313 istate->set_bcp(pc+opsize); \ 314 return; 315 316 317 #define METHOD istate->method() 318 #define GET_METHOD_COUNTERS(res) \ 319 res = METHOD->method_counters(); \ 320 if (res == NULL) { \ 321 CALL_VM(res = InterpreterRuntime::build_method_counters(THREAD, METHOD), handle_exception); \ 322 } 323 324 #define OSR_REQUEST(res, branch_pc) \ 325 CALL_VM(res=InterpreterRuntime::frequency_counter_overflow(THREAD, branch_pc), handle_exception); 326 /* 327 * For those opcodes that need to have a GC point on a backwards branch 328 */ 329 330 // Backedge counting is kind of strange. The asm interpreter will increment 331 // the backedge counter as a separate counter but it does it's comparisons 332 // to the sum (scaled) of invocation counter and backedge count to make 333 // a decision. Seems kind of odd to sum them together like that 334 335 // skip is delta from current bcp/bci for target, branch_pc is pre-branch bcp 336 337 338 #define DO_BACKEDGE_CHECKS(skip, branch_pc) \ 339 if ((skip) <= 0) { \ 340 MethodCounters* mcs; \ 341 GET_METHOD_COUNTERS(mcs); \ 342 if (UseLoopCounter) { \ 343 bool do_OSR = UseOnStackReplacement; \ 344 mcs->backedge_counter()->increment(); \ 345 if (ProfileInterpreter) { \ 346 BI_PROFILE_GET_OR_CREATE_METHOD_DATA(handle_exception); \ 347 /* Check for overflow against MDO count. */ \ 348 do_OSR = do_OSR \ 349 && (mdo_last_branch_taken_count >= (uint)InvocationCounter::InterpreterBackwardBranchLimit)\ 350 /* When ProfileInterpreter is on, the backedge_count comes */ \ 351 /* from the methodDataOop, which value does not get reset on */ \ 352 /* the call to frequency_counter_overflow(). To avoid */ \ 353 /* excessive calls to the overflow routine while the method is */ \ 354 /* being compiled, add a second test to make sure the overflow */ \ 355 /* function is called only once every overflow_frequency. */ \ 356 && (!(mdo_last_branch_taken_count & 1023)); \ 357 } else { \ 358 /* check for overflow of backedge counter */ \ 359 do_OSR = do_OSR \ 360 && mcs->invocation_counter()->reached_InvocationLimit(mcs->backedge_counter()); \ 361 } \ 362 if (do_OSR) { \ 363 nmethod* osr_nmethod; \ 364 OSR_REQUEST(osr_nmethod, branch_pc); \ 365 if (osr_nmethod != NULL && osr_nmethod->osr_entry_bci() != InvalidOSREntryBci) { \ 366 intptr_t* buf; \ 367 /* Call OSR migration with last java frame only, no checks. */ \ 368 CALL_VM_NAKED_LJF(buf=SharedRuntime::OSR_migration_begin(THREAD)); \ 369 istate->set_msg(do_osr); \ 370 istate->set_osr_buf((address)buf); \ 371 istate->set_osr_entry(osr_nmethod->osr_entry()); \ 372 return; \ 373 } \ 374 } \ 375 } /* UseCompiler ... */ \ 376 SAFEPOINT; \ 377 } 378 379 /* 380 * For those opcodes that need to have a GC point on a backwards branch 381 */ 382 383 /* 384 * Macros for caching and flushing the interpreter state. Some local 385 * variables need to be flushed out to the frame before we do certain 386 * things (like pushing frames or becomming gc safe) and some need to 387 * be recached later (like after popping a frame). We could use one 388 * macro to cache or decache everything, but this would be less then 389 * optimal because we don't always need to cache or decache everything 390 * because some things we know are already cached or decached. 391 */ 392 #undef DECACHE_TOS 393 #undef CACHE_TOS 394 #undef CACHE_PREV_TOS 395 #define DECACHE_TOS() istate->set_stack(topOfStack); 396 397 #define CACHE_TOS() topOfStack = (intptr_t *)istate->stack(); 398 399 #undef DECACHE_PC 400 #undef CACHE_PC 401 #define DECACHE_PC() istate->set_bcp(pc); 402 #define CACHE_PC() pc = istate->bcp(); 403 #define CACHE_CP() cp = istate->constants(); 404 #define CACHE_LOCALS() locals = istate->locals(); 405 #undef CACHE_FRAME 406 #define CACHE_FRAME() 407 408 // BCI() returns the current bytecode-index. 409 #undef BCI 410 #define BCI() ((int)(intptr_t)(pc - (intptr_t)istate->method()->code_base())) 411 412 /* 413 * CHECK_NULL - Macro for throwing a NullPointerException if the object 414 * passed is a null ref. 415 * On some architectures/platforms it should be possible to do this implicitly 416 */ 417 #undef CHECK_NULL 418 #define CHECK_NULL(obj_) \ 419 if ((obj_) == NULL) { \ 420 VM_JAVA_ERROR(vmSymbols::java_lang_NullPointerException(), "", note_nullCheck_trap); \ 421 } \ 422 VERIFY_OOP(obj_) 423 424 #define VMdoubleConstZero() 0.0 425 #define VMdoubleConstOne() 1.0 426 #define VMlongConstZero() (max_jlong-max_jlong) 427 #define VMlongConstOne() ((max_jlong-max_jlong)+1) 428 429 /* 430 * Alignment 431 */ 432 #define VMalignWordUp(val) (((uintptr_t)(val) + 3) & ~3) 433 434 // Decache the interpreter state that interpreter modifies directly (i.e. GC is indirect mod) 435 #define DECACHE_STATE() DECACHE_PC(); DECACHE_TOS(); 436 437 // Reload interpreter state after calling the VM or a possible GC 438 #define CACHE_STATE() \ 439 CACHE_TOS(); \ 440 CACHE_PC(); \ 441 CACHE_CP(); \ 442 CACHE_LOCALS(); 443 444 // Call the VM with last java frame only. 445 #define CALL_VM_NAKED_LJF(func) \ 446 DECACHE_STATE(); \ 447 SET_LAST_JAVA_FRAME(); \ 448 func; \ 449 RESET_LAST_JAVA_FRAME(); \ 450 CACHE_STATE(); 451 452 // Call the VM. Don't check for pending exceptions. 453 #define CALL_VM_NOCHECK(func) \ 454 CALL_VM_NAKED_LJF(func) \ 455 if (THREAD->pop_frame_pending() && \ 456 !THREAD->pop_frame_in_process()) { \ 457 goto handle_Pop_Frame; \ 458 } \ 459 if (THREAD->jvmti_thread_state() && \ 460 THREAD->jvmti_thread_state()->is_earlyret_pending()) { \ 461 goto handle_Early_Return; \ 462 } 463 464 // Call the VM and check for pending exceptions 465 #define CALL_VM(func, label) { \ 466 CALL_VM_NOCHECK(func); \ 467 if (THREAD->has_pending_exception()) goto label; \ 468 } 469 470 /* 471 * BytecodeInterpreter::run(interpreterState istate) 472 * BytecodeInterpreter::runWithChecks(interpreterState istate) 473 * 474 * The real deal. This is where byte codes actually get interpreted. 475 * Basically it's a big while loop that iterates until we return from 476 * the method passed in. 477 * 478 * The runWithChecks is used if JVMTI is enabled. 479 * 480 */ 481 #if defined(VM_JVMTI) 482 void 483 BytecodeInterpreter::runWithChecks(interpreterState istate) { 484 #else 485 void 486 BytecodeInterpreter::run(interpreterState istate) { 487 #endif 488 489 // In order to simplify some tests based on switches set at runtime 490 // we invoke the interpreter a single time after switches are enabled 491 // and set simpler to to test variables rather than method calls or complex 492 // boolean expressions. 493 494 static int initialized = 0; 495 static int checkit = 0; 496 static intptr_t* c_addr = NULL; 497 static intptr_t c_value; 498 499 if (checkit && *c_addr != c_value) { 500 os::breakpoint(); 501 } 502 #ifdef VM_JVMTI 503 static bool _jvmti_interp_events = 0; 504 #endif 505 506 static int _compiling; // (UseCompiler || CountCompiledCalls) 507 508 #ifdef ASSERT 509 if (istate->_msg != initialize) { 510 // We have a problem here if we are running with a pre-hsx24 JDK (for example during bootstrap) 511 // because in that case, EnableInvokeDynamic is true by default but will be later switched off 512 // if java_lang_invoke_MethodHandle::compute_offsets() detects that the JDK only has the classes 513 // for the old JSR292 implementation. 514 // This leads to a situation where 'istate->_stack_limit' always accounts for 515 // methodOopDesc::extra_stack_entries() because it is computed in 516 // CppInterpreterGenerator::generate_compute_interpreter_state() which was generated while 517 // EnableInvokeDynamic was still true. On the other hand, istate->_method->max_stack() doesn't 518 // account for extra_stack_entries() anymore because at the time when it is called 519 // EnableInvokeDynamic was already set to false. 520 // So we have a second version of the assertion which handles the case where EnableInvokeDynamic was 521 // switched off because of the wrong classes. 522 if (EnableInvokeDynamic || FLAG_IS_CMDLINE(EnableInvokeDynamic)) { 523 assert(labs(istate->_stack_base - istate->_stack_limit) == (istate->_method->max_stack() + 1), "bad stack limit"); 524 } else { 525 const int extra_stack_entries = Method::extra_stack_entries_for_jsr292; 526 assert(labs(istate->_stack_base - istate->_stack_limit) == (istate->_method->max_stack() + extra_stack_entries 527 + 1), "bad stack limit"); 528 } 529 #ifndef SHARK 530 IA32_ONLY(assert(istate->_stack_limit == istate->_thread->last_Java_sp() + 1, "wrong")); 531 #endif // !SHARK 532 } 533 // Verify linkages. 534 interpreterState l = istate; 535 do { 536 assert(l == l->_self_link, "bad link"); 537 l = l->_prev_link; 538 } while (l != NULL); 539 // Screwups with stack management usually cause us to overwrite istate 540 // save a copy so we can verify it. 541 interpreterState orig = istate; 542 #endif 543 544 register intptr_t* topOfStack = (intptr_t *)istate->stack(); /* access with STACK macros */ 545 register address pc = istate->bcp(); 546 register jubyte opcode; 547 register intptr_t* locals = istate->locals(); 548 register ConstantPoolCache* cp = istate->constants(); // method()->constants()->cache() 549 #ifdef LOTS_OF_REGS 550 register JavaThread* THREAD = istate->thread(); 551 #else 552 #undef THREAD 553 #define THREAD istate->thread() 554 #endif 555 556 #ifdef USELABELS 557 const static void* const opclabels_data[256] = { 558 /* 0x00 */ &&opc_nop, &&opc_aconst_null,&&opc_iconst_m1,&&opc_iconst_0, 559 /* 0x04 */ &&opc_iconst_1,&&opc_iconst_2, &&opc_iconst_3, &&opc_iconst_4, 560 /* 0x08 */ &&opc_iconst_5,&&opc_lconst_0, &&opc_lconst_1, &&opc_fconst_0, 561 /* 0x0C */ &&opc_fconst_1,&&opc_fconst_2, &&opc_dconst_0, &&opc_dconst_1, 562 563 /* 0x10 */ &&opc_bipush, &&opc_sipush, &&opc_ldc, &&opc_ldc_w, 564 /* 0x14 */ &&opc_ldc2_w, &&opc_iload, &&opc_lload, &&opc_fload, 565 /* 0x18 */ &&opc_dload, &&opc_aload, &&opc_iload_0,&&opc_iload_1, 566 /* 0x1C */ &&opc_iload_2,&&opc_iload_3,&&opc_lload_0,&&opc_lload_1, 567 568 /* 0x20 */ &&opc_lload_2,&&opc_lload_3,&&opc_fload_0,&&opc_fload_1, 569 /* 0x24 */ &&opc_fload_2,&&opc_fload_3,&&opc_dload_0,&&opc_dload_1, 570 /* 0x28 */ &&opc_dload_2,&&opc_dload_3,&&opc_aload_0,&&opc_aload_1, 571 /* 0x2C */ &&opc_aload_2,&&opc_aload_3,&&opc_iaload, &&opc_laload, 572 573 /* 0x30 */ &&opc_faload, &&opc_daload, &&opc_aaload, &&opc_baload, 574 /* 0x34 */ &&opc_caload, &&opc_saload, &&opc_istore, &&opc_lstore, 575 /* 0x38 */ &&opc_fstore, &&opc_dstore, &&opc_astore, &&opc_istore_0, 576 /* 0x3C */ &&opc_istore_1,&&opc_istore_2,&&opc_istore_3,&&opc_lstore_0, 577 578 /* 0x40 */ &&opc_lstore_1,&&opc_lstore_2,&&opc_lstore_3,&&opc_fstore_0, 579 /* 0x44 */ &&opc_fstore_1,&&opc_fstore_2,&&opc_fstore_3,&&opc_dstore_0, 580 /* 0x48 */ &&opc_dstore_1,&&opc_dstore_2,&&opc_dstore_3,&&opc_astore_0, 581 /* 0x4C */ &&opc_astore_1,&&opc_astore_2,&&opc_astore_3,&&opc_iastore, 582 583 /* 0x50 */ &&opc_lastore,&&opc_fastore,&&opc_dastore,&&opc_aastore, 584 /* 0x54 */ &&opc_bastore,&&opc_castore,&&opc_sastore,&&opc_pop, 585 /* 0x58 */ &&opc_pop2, &&opc_dup, &&opc_dup_x1, &&opc_dup_x2, 586 /* 0x5C */ &&opc_dup2, &&opc_dup2_x1,&&opc_dup2_x2,&&opc_swap, 587 588 /* 0x60 */ &&opc_iadd,&&opc_ladd,&&opc_fadd,&&opc_dadd, 589 /* 0x64 */ &&opc_isub,&&opc_lsub,&&opc_fsub,&&opc_dsub, 590 /* 0x68 */ &&opc_imul,&&opc_lmul,&&opc_fmul,&&opc_dmul, 591 /* 0x6C */ &&opc_idiv,&&opc_ldiv,&&opc_fdiv,&&opc_ddiv, 592 593 /* 0x70 */ &&opc_irem, &&opc_lrem, &&opc_frem,&&opc_drem, 594 /* 0x74 */ &&opc_ineg, &&opc_lneg, &&opc_fneg,&&opc_dneg, 595 /* 0x78 */ &&opc_ishl, &&opc_lshl, &&opc_ishr,&&opc_lshr, 596 /* 0x7C */ &&opc_iushr,&&opc_lushr,&&opc_iand,&&opc_land, 597 598 /* 0x80 */ &&opc_ior, &&opc_lor,&&opc_ixor,&&opc_lxor, 599 /* 0x84 */ &&opc_iinc,&&opc_i2l,&&opc_i2f, &&opc_i2d, 600 /* 0x88 */ &&opc_l2i, &&opc_l2f,&&opc_l2d, &&opc_f2i, 601 /* 0x8C */ &&opc_f2l, &&opc_f2d,&&opc_d2i, &&opc_d2l, 602 603 /* 0x90 */ &&opc_d2f, &&opc_i2b, &&opc_i2c, &&opc_i2s, 604 /* 0x94 */ &&opc_lcmp, &&opc_fcmpl,&&opc_fcmpg,&&opc_dcmpl, 605 /* 0x98 */ &&opc_dcmpg,&&opc_ifeq, &&opc_ifne, &&opc_iflt, 606 /* 0x9C */ &&opc_ifge, &&opc_ifgt, &&opc_ifle, &&opc_if_icmpeq, 607 608 /* 0xA0 */ &&opc_if_icmpne,&&opc_if_icmplt,&&opc_if_icmpge, &&opc_if_icmpgt, 609 /* 0xA4 */ &&opc_if_icmple,&&opc_if_acmpeq,&&opc_if_acmpne, &&opc_goto, 610 /* 0xA8 */ &&opc_jsr, &&opc_ret, &&opc_tableswitch,&&opc_lookupswitch, 611 /* 0xAC */ &&opc_ireturn, &&opc_lreturn, &&opc_freturn, &&opc_dreturn, 612 613 /* 0xB0 */ &&opc_areturn, &&opc_return, &&opc_getstatic, &&opc_putstatic, 614 /* 0xB4 */ &&opc_getfield, &&opc_putfield, &&opc_invokevirtual,&&opc_invokespecial, 615 /* 0xB8 */ &&opc_invokestatic,&&opc_invokeinterface,&&opc_invokedynamic,&&opc_new, 616 /* 0xBC */ &&opc_newarray, &&opc_anewarray, &&opc_arraylength, &&opc_athrow, 617 618 /* 0xC0 */ &&opc_checkcast, &&opc_instanceof, &&opc_monitorenter, &&opc_monitorexit, 619 /* 0xC4 */ &&opc_wide, &&opc_multianewarray, &&opc_ifnull, &&opc_ifnonnull, 620 /* 0xC8 */ &&opc_goto_w, &&opc_jsr_w, &&opc_breakpoint, &&opc_default, 621 /* 0xCC */ &&opc_default, &&opc_default, &&opc_default, &&opc_default, 622 623 /* 0xD0 */ &&opc_default, &&opc_default, &&opc_default, &&opc_default, 624 /* 0xD4 */ &&opc_default, &&opc_default, &&opc_default, &&opc_default, 625 /* 0xD8 */ &&opc_default, &&opc_default, &&opc_default, &&opc_default, 626 /* 0xDC */ &&opc_default, &&opc_default, &&opc_default, &&opc_default, 627 628 /* 0xE0 */ &&opc_default, &&opc_default, &&opc_default, &&opc_default, 629 /* 0xE4 */ &&opc_default, &&opc_fast_aldc, &&opc_fast_aldc_w, &&opc_return_register_finalizer, 630 /* 0xE8 */ &&opc_invokehandle,&&opc_default, &&opc_default, &&opc_default, 631 /* 0xEC */ &&opc_default, &&opc_default, &&opc_default, &&opc_default, 632 633 /* 0xF0 */ &&opc_default, &&opc_default, &&opc_default, &&opc_default, 634 /* 0xF4 */ &&opc_default, &&opc_default, &&opc_default, &&opc_default, 635 /* 0xF8 */ &&opc_default, &&opc_default, &&opc_default, &&opc_default, 636 /* 0xFC */ &&opc_default, &&opc_default, &&opc_default, &&opc_default 637 }; 638 register uintptr_t *dispatch_table = (uintptr_t*)&opclabels_data[0]; 639 #endif /* USELABELS */ 640 641 #ifdef ASSERT 642 // this will trigger a VERIFY_OOP on entry 643 if (istate->msg() != initialize && ! METHOD->is_static()) { 644 oop rcvr = LOCALS_OBJECT(0); 645 VERIFY_OOP(rcvr); 646 } 647 #endif 648 // #define HACK 649 #ifdef HACK 650 bool interesting = false; 651 #endif // HACK 652 653 /* QQQ this should be a stack method so we don't know actual direction */ 654 guarantee(istate->msg() == initialize || 655 topOfStack >= istate->stack_limit() && 656 topOfStack < istate->stack_base(), 657 "Stack top out of range"); 658 659 #ifdef CC_INTERP_PROFILE 660 // MethodData's last branch taken count. 661 uint mdo_last_branch_taken_count = 0; 662 #else 663 const uint mdo_last_branch_taken_count = 0; 664 #endif 665 666 switch (istate->msg()) { 667 case initialize: { 668 if (initialized++) ShouldNotReachHere(); // Only one initialize call. 669 _compiling = (UseCompiler || CountCompiledCalls); 670 #ifdef VM_JVMTI 671 _jvmti_interp_events = JvmtiExport::can_post_interpreter_events(); 672 #endif 673 return; 674 } 675 break; 676 case method_entry: { 677 THREAD->set_do_not_unlock(); 678 // count invocations 679 assert(initialized, "Interpreter not initialized"); 680 if (_compiling) { 681 MethodCounters* mcs; 682 GET_METHOD_COUNTERS(mcs); 683 if (ProfileInterpreter) { 684 METHOD->increment_interpreter_invocation_count(THREAD); 685 } 686 mcs->invocation_counter()->increment(); 687 if (mcs->invocation_counter()->reached_InvocationLimit(mcs->backedge_counter())) { 688 CALL_VM((void)InterpreterRuntime::frequency_counter_overflow(THREAD, NULL), handle_exception); 689 // We no longer retry on a counter overflow. 690 } 691 // Get or create profile data. Check for pending (async) exceptions. 692 BI_PROFILE_GET_OR_CREATE_METHOD_DATA(handle_exception); 693 SAFEPOINT; 694 } 695 696 if ((istate->_stack_base - istate->_stack_limit) != istate->method()->max_stack() + 1) { 697 // initialize 698 os::breakpoint(); 699 } 700 701 #ifdef HACK 702 { 703 ResourceMark rm; 704 char *method_name = istate->method()->name_and_sig_as_C_string(); 705 if (strstr(method_name, "runThese$TestRunner.run()V") != NULL) { 706 tty->print_cr("entering: depth %d bci: %d", 707 (istate->_stack_base - istate->_stack), 708 istate->_bcp - istate->_method->code_base()); 709 interesting = true; 710 } 711 } 712 #endif // HACK 713 714 // Lock method if synchronized. 715 if (METHOD->is_synchronized()) { 716 // oop rcvr = locals[0].j.r; 717 oop rcvr; 718 if (METHOD->is_static()) { 719 rcvr = METHOD->constants()->pool_holder()->java_mirror(); 720 } else { 721 rcvr = LOCALS_OBJECT(0); 722 VERIFY_OOP(rcvr); 723 } 724 // The initial monitor is ours for the taking. 725 // Monitor not filled in frame manager any longer as this caused race condition with biased locking. 726 BasicObjectLock* mon = &istate->monitor_base()[-1]; 727 mon->set_obj(rcvr); 728 bool success = false; 729 uintptr_t epoch_mask_in_place = (uintptr_t)markOopDesc::epoch_mask_in_place; 730 markOop mark = rcvr->mark(); 731 intptr_t hash = (intptr_t) markOopDesc::no_hash; 732 // Implies UseBiasedLocking. 733 if (mark->has_bias_pattern()) { 734 uintptr_t thread_ident; 735 uintptr_t anticipated_bias_locking_value; 736 thread_ident = (uintptr_t)istate->thread(); 737 anticipated_bias_locking_value = 738 (((uintptr_t)rcvr->klass()->prototype_header() | thread_ident) ^ (uintptr_t)mark) & 739 ~((uintptr_t) markOopDesc::age_mask_in_place); 740 741 if (anticipated_bias_locking_value == 0) { 742 // Already biased towards this thread, nothing to do. 743 if (PrintBiasedLockingStatistics) { 744 (* BiasedLocking::biased_lock_entry_count_addr())++; 745 } 746 success = true; 747 } else if ((anticipated_bias_locking_value & markOopDesc::biased_lock_mask_in_place) != 0) { 748 // Try to revoke bias. 749 markOop header = rcvr->klass()->prototype_header(); 750 if (hash != markOopDesc::no_hash) { 751 header = header->copy_set_hash(hash); 752 } 753 if (Atomic::cmpxchg_ptr(header, rcvr->mark_addr(), mark) == mark) { 754 if (PrintBiasedLockingStatistics) 755 (*BiasedLocking::revoked_lock_entry_count_addr())++; 756 } 757 } else if ((anticipated_bias_locking_value & epoch_mask_in_place) != 0) { 758 // Try to rebias. 759 markOop new_header = (markOop) ( (intptr_t) rcvr->klass()->prototype_header() | thread_ident); 760 if (hash != markOopDesc::no_hash) { 761 new_header = new_header->copy_set_hash(hash); 762 } 763 if (Atomic::cmpxchg_ptr((void*)new_header, rcvr->mark_addr(), mark) == mark) { 764 if (PrintBiasedLockingStatistics) { 765 (* BiasedLocking::rebiased_lock_entry_count_addr())++; 766 } 767 } else { 768 CALL_VM(InterpreterRuntime::monitorenter(THREAD, mon), handle_exception); 769 } 770 success = true; 771 } else { 772 // Try to bias towards thread in case object is anonymously biased. 773 markOop header = (markOop) ((uintptr_t) mark & 774 ((uintptr_t)markOopDesc::biased_lock_mask_in_place | 775 (uintptr_t)markOopDesc::age_mask_in_place | epoch_mask_in_place)); 776 if (hash != markOopDesc::no_hash) { 777 header = header->copy_set_hash(hash); 778 } 779 markOop new_header = (markOop) ((uintptr_t) header | thread_ident); 780 // Debugging hint. 781 DEBUG_ONLY(mon->lock()->set_displaced_header((markOop) (uintptr_t) 0xdeaddead);) 782 if (Atomic::cmpxchg_ptr((void*)new_header, rcvr->mark_addr(), header) == header) { 783 if (PrintBiasedLockingStatistics) { 784 (* BiasedLocking::anonymously_biased_lock_entry_count_addr())++; 785 } 786 } else { 787 CALL_VM(InterpreterRuntime::monitorenter(THREAD, mon), handle_exception); 788 } 789 success = true; 790 } 791 } 792 793 // Traditional lightweight locking. 794 if (!success) { 795 markOop displaced = rcvr->mark()->set_unlocked(); 796 mon->lock()->set_displaced_header(displaced); 797 bool call_vm = UseHeavyMonitors; 798 if (call_vm || Atomic::cmpxchg_ptr(mon, rcvr->mark_addr(), displaced) != displaced) { 799 // Is it simple recursive case? 800 if (!call_vm && THREAD->is_lock_owned((address) displaced->clear_lock_bits())) { 801 mon->lock()->set_displaced_header(NULL); 802 } else { 803 CALL_VM(InterpreterRuntime::monitorenter(THREAD, mon), handle_exception); 804 } 805 } 806 } 807 } 808 THREAD->clr_do_not_unlock(); 809 810 // Notify jvmti 811 #ifdef VM_JVMTI 812 if (_jvmti_interp_events) { 813 // Whenever JVMTI puts a thread in interp_only_mode, method 814 // entry/exit events are sent for that thread to track stack depth. 815 if (THREAD->is_interp_only_mode()) { 816 CALL_VM(InterpreterRuntime::post_method_entry(THREAD), 817 handle_exception); 818 } 819 } 820 #endif /* VM_JVMTI */ 821 822 goto run; 823 } 824 825 case popping_frame: { 826 // returned from a java call to pop the frame, restart the call 827 // clear the message so we don't confuse ourselves later 828 assert(THREAD->pop_frame_in_process(), "wrong frame pop state"); 829 istate->set_msg(no_request); 830 if (_compiling) { 831 // Set MDX back to the ProfileData of the invoke bytecode that will be 832 // restarted. 833 SET_MDX(NULL); 834 BI_PROFILE_GET_OR_CREATE_METHOD_DATA(handle_exception); 835 } 836 THREAD->clr_pop_frame_in_process(); 837 goto run; 838 } 839 840 case method_resume: { 841 if ((istate->_stack_base - istate->_stack_limit) != istate->method()->max_stack() + 1) { 842 // resume 843 os::breakpoint(); 844 } 845 #ifdef HACK 846 { 847 ResourceMark rm; 848 char *method_name = istate->method()->name_and_sig_as_C_string(); 849 if (strstr(method_name, "runThese$TestRunner.run()V") != NULL) { 850 tty->print_cr("resume: depth %d bci: %d", 851 (istate->_stack_base - istate->_stack) , 852 istate->_bcp - istate->_method->code_base()); 853 interesting = true; 854 } 855 } 856 #endif // HACK 857 // returned from a java call, continue executing. 858 if (THREAD->pop_frame_pending() && !THREAD->pop_frame_in_process()) { 859 goto handle_Pop_Frame; 860 } 861 if (THREAD->jvmti_thread_state() && 862 THREAD->jvmti_thread_state()->is_earlyret_pending()) { 863 goto handle_Early_Return; 864 } 865 866 if (THREAD->has_pending_exception()) goto handle_exception; 867 // Update the pc by the saved amount of the invoke bytecode size 868 UPDATE_PC(istate->bcp_advance()); 869 870 if (_compiling) { 871 // Get or create profile data. Check for pending (async) exceptions. 872 BI_PROFILE_GET_OR_CREATE_METHOD_DATA(handle_exception); 873 } 874 goto run; 875 } 876 877 case deopt_resume2: { 878 // Returned from an opcode that will reexecute. Deopt was 879 // a result of a PopFrame request. 880 // 881 882 if (_compiling) { 883 // Get or create profile data. Check for pending (async) exceptions. 884 BI_PROFILE_GET_OR_CREATE_METHOD_DATA(handle_exception); 885 } 886 goto run; 887 } 888 889 case deopt_resume: { 890 // Returned from an opcode that has completed. The stack has 891 // the result all we need to do is skip across the bytecode 892 // and continue (assuming there is no exception pending) 893 // 894 // compute continuation length 895 // 896 // Note: it is possible to deopt at a return_register_finalizer opcode 897 // because this requires entering the vm to do the registering. While the 898 // opcode is complete we can't advance because there are no more opcodes 899 // much like trying to deopt at a poll return. In that has we simply 900 // get out of here 901 // 902 if ( Bytecodes::code_at(METHOD, pc) == Bytecodes::_return_register_finalizer) { 903 // this will do the right thing even if an exception is pending. 904 goto handle_return; 905 } 906 UPDATE_PC(Bytecodes::length_at(METHOD, pc)); 907 if (THREAD->has_pending_exception()) goto handle_exception; 908 909 if (_compiling) { 910 // Get or create profile data. Check for pending (async) exceptions. 911 BI_PROFILE_GET_OR_CREATE_METHOD_DATA(handle_exception); 912 } 913 goto run; 914 } 915 case got_monitors: { 916 // continue locking now that we have a monitor to use 917 // we expect to find newly allocated monitor at the "top" of the monitor stack. 918 oop lockee = STACK_OBJECT(-1); 919 VERIFY_OOP(lockee); 920 // derefing's lockee ought to provoke implicit null check 921 // find a free monitor 922 BasicObjectLock* entry = (BasicObjectLock*) istate->stack_base(); 923 assert(entry->obj() == NULL, "Frame manager didn't allocate the monitor"); 924 entry->set_obj(lockee); 925 bool success = false; 926 uintptr_t epoch_mask_in_place = (uintptr_t)markOopDesc::epoch_mask_in_place; 927 928 markOop mark = lockee->mark(); 929 intptr_t hash = (intptr_t) markOopDesc::no_hash; 930 // implies UseBiasedLocking 931 if (mark->has_bias_pattern()) { 932 uintptr_t thread_ident; 933 uintptr_t anticipated_bias_locking_value; 934 thread_ident = (uintptr_t)istate->thread(); 935 anticipated_bias_locking_value = 936 (((uintptr_t)lockee->klass()->prototype_header() | thread_ident) ^ (uintptr_t)mark) & 937 ~((uintptr_t) markOopDesc::age_mask_in_place); 938 939 if (anticipated_bias_locking_value == 0) { 940 // already biased towards this thread, nothing to do 941 if (PrintBiasedLockingStatistics) { 942 (* BiasedLocking::biased_lock_entry_count_addr())++; 943 } 944 success = true; 945 } else if ((anticipated_bias_locking_value & markOopDesc::biased_lock_mask_in_place) != 0) { 946 // try revoke bias 947 markOop header = lockee->klass()->prototype_header(); 948 if (hash != markOopDesc::no_hash) { 949 header = header->copy_set_hash(hash); 950 } 951 if (Atomic::cmpxchg_ptr(header, lockee->mark_addr(), mark) == mark) { 952 if (PrintBiasedLockingStatistics) { 953 (*BiasedLocking::revoked_lock_entry_count_addr())++; 954 } 955 } 956 } else if ((anticipated_bias_locking_value & epoch_mask_in_place) !=0) { 957 // try rebias 958 markOop new_header = (markOop) ( (intptr_t) lockee->klass()->prototype_header() | thread_ident); 959 if (hash != markOopDesc::no_hash) { 960 new_header = new_header->copy_set_hash(hash); 961 } 962 if (Atomic::cmpxchg_ptr((void*)new_header, lockee->mark_addr(), mark) == mark) { 963 if (PrintBiasedLockingStatistics) { 964 (* BiasedLocking::rebiased_lock_entry_count_addr())++; 965 } 966 } else { 967 CALL_VM(InterpreterRuntime::monitorenter(THREAD, entry), handle_exception); 968 } 969 success = true; 970 } else { 971 // try to bias towards thread in case object is anonymously biased 972 markOop header = (markOop) ((uintptr_t) mark & ((uintptr_t)markOopDesc::biased_lock_mask_in_place | 973 (uintptr_t)markOopDesc::age_mask_in_place | epoch_mask_in_place)); 974 if (hash != markOopDesc::no_hash) { 975 header = header->copy_set_hash(hash); 976 } 977 markOop new_header = (markOop) ((uintptr_t) header | thread_ident); 978 // debugging hint 979 DEBUG_ONLY(entry->lock()->set_displaced_header((markOop) (uintptr_t) 0xdeaddead);) 980 if (Atomic::cmpxchg_ptr((void*)new_header, lockee->mark_addr(), header) == header) { 981 if (PrintBiasedLockingStatistics) { 982 (* BiasedLocking::anonymously_biased_lock_entry_count_addr())++; 983 } 984 } else { 985 CALL_VM(InterpreterRuntime::monitorenter(THREAD, entry), handle_exception); 986 } 987 success = true; 988 } 989 } 990 991 // traditional lightweight locking 992 if (!success) { 993 markOop displaced = lockee->mark()->set_unlocked(); 994 entry->lock()->set_displaced_header(displaced); 995 bool call_vm = UseHeavyMonitors; 996 if (call_vm || Atomic::cmpxchg_ptr(entry, lockee->mark_addr(), displaced) != displaced) { 997 // Is it simple recursive case? 998 if (!call_vm && THREAD->is_lock_owned((address) displaced->clear_lock_bits())) { 999 entry->lock()->set_displaced_header(NULL); 1000 } else { 1001 CALL_VM(InterpreterRuntime::monitorenter(THREAD, entry), handle_exception); 1002 } 1003 } 1004 } 1005 UPDATE_PC_AND_TOS(1, -1); 1006 goto run; 1007 } 1008 default: { 1009 fatal("Unexpected message from frame manager"); 1010 } 1011 } 1012 1013 run: 1014 1015 DO_UPDATE_INSTRUCTION_COUNT(*pc) 1016 DEBUGGER_SINGLE_STEP_NOTIFY(); 1017 #ifdef PREFETCH_OPCCODE 1018 opcode = *pc; /* prefetch first opcode */ 1019 #endif 1020 1021 #ifndef USELABELS 1022 while (1) 1023 #endif 1024 { 1025 #ifndef PREFETCH_OPCCODE 1026 opcode = *pc; 1027 #endif 1028 // Seems like this happens twice per opcode. At worst this is only 1029 // need at entry to the loop. 1030 // DEBUGGER_SINGLE_STEP_NOTIFY(); 1031 /* Using this labels avoids double breakpoints when quickening and 1032 * when returing from transition frames. 1033 */ 1034 opcode_switch: 1035 assert(istate == orig, "Corrupted istate"); 1036 /* QQQ Hmm this has knowledge of direction, ought to be a stack method */ 1037 assert(topOfStack >= istate->stack_limit(), "Stack overrun"); 1038 assert(topOfStack < istate->stack_base(), "Stack underrun"); 1039 1040 #ifdef USELABELS 1041 DISPATCH(opcode); 1042 #else 1043 switch (opcode) 1044 #endif 1045 { 1046 CASE(_nop): 1047 UPDATE_PC_AND_CONTINUE(1); 1048 1049 /* Push miscellaneous constants onto the stack. */ 1050 1051 CASE(_aconst_null): 1052 SET_STACK_OBJECT(NULL, 0); 1053 UPDATE_PC_AND_TOS_AND_CONTINUE(1, 1); 1054 1055 #undef OPC_CONST_n 1056 #define OPC_CONST_n(opcode, const_type, value) \ 1057 CASE(opcode): \ 1058 SET_STACK_ ## const_type(value, 0); \ 1059 UPDATE_PC_AND_TOS_AND_CONTINUE(1, 1); 1060 1061 OPC_CONST_n(_iconst_m1, INT, -1); 1062 OPC_CONST_n(_iconst_0, INT, 0); 1063 OPC_CONST_n(_iconst_1, INT, 1); 1064 OPC_CONST_n(_iconst_2, INT, 2); 1065 OPC_CONST_n(_iconst_3, INT, 3); 1066 OPC_CONST_n(_iconst_4, INT, 4); 1067 OPC_CONST_n(_iconst_5, INT, 5); 1068 OPC_CONST_n(_fconst_0, FLOAT, 0.0); 1069 OPC_CONST_n(_fconst_1, FLOAT, 1.0); 1070 OPC_CONST_n(_fconst_2, FLOAT, 2.0); 1071 1072 #undef OPC_CONST2_n 1073 #define OPC_CONST2_n(opcname, value, key, kind) \ 1074 CASE(_##opcname): \ 1075 { \ 1076 SET_STACK_ ## kind(VM##key##Const##value(), 1); \ 1077 UPDATE_PC_AND_TOS_AND_CONTINUE(1, 2); \ 1078 } 1079 OPC_CONST2_n(dconst_0, Zero, double, DOUBLE); 1080 OPC_CONST2_n(dconst_1, One, double, DOUBLE); 1081 OPC_CONST2_n(lconst_0, Zero, long, LONG); 1082 OPC_CONST2_n(lconst_1, One, long, LONG); 1083 1084 /* Load constant from constant pool: */ 1085 1086 /* Push a 1-byte signed integer value onto the stack. */ 1087 CASE(_bipush): 1088 SET_STACK_INT((jbyte)(pc[1]), 0); 1089 UPDATE_PC_AND_TOS_AND_CONTINUE(2, 1); 1090 1091 /* Push a 2-byte signed integer constant onto the stack. */ 1092 CASE(_sipush): 1093 SET_STACK_INT((int16_t)Bytes::get_Java_u2(pc + 1), 0); 1094 UPDATE_PC_AND_TOS_AND_CONTINUE(3, 1); 1095 1096 /* load from local variable */ 1097 1098 CASE(_aload): 1099 VERIFY_OOP(LOCALS_OBJECT(pc[1])); 1100 SET_STACK_OBJECT(LOCALS_OBJECT(pc[1]), 0); 1101 UPDATE_PC_AND_TOS_AND_CONTINUE(2, 1); 1102 1103 CASE(_iload): 1104 CASE(_fload): 1105 SET_STACK_SLOT(LOCALS_SLOT(pc[1]), 0); 1106 UPDATE_PC_AND_TOS_AND_CONTINUE(2, 1); 1107 1108 CASE(_lload): 1109 SET_STACK_LONG_FROM_ADDR(LOCALS_LONG_AT(pc[1]), 1); 1110 UPDATE_PC_AND_TOS_AND_CONTINUE(2, 2); 1111 1112 CASE(_dload): 1113 SET_STACK_DOUBLE_FROM_ADDR(LOCALS_DOUBLE_AT(pc[1]), 1); 1114 UPDATE_PC_AND_TOS_AND_CONTINUE(2, 2); 1115 1116 #undef OPC_LOAD_n 1117 #define OPC_LOAD_n(num) \ 1118 CASE(_aload_##num): \ 1119 VERIFY_OOP(LOCALS_OBJECT(num)); \ 1120 SET_STACK_OBJECT(LOCALS_OBJECT(num), 0); \ 1121 UPDATE_PC_AND_TOS_AND_CONTINUE(1, 1); \ 1122 \ 1123 CASE(_iload_##num): \ 1124 CASE(_fload_##num): \ 1125 SET_STACK_SLOT(LOCALS_SLOT(num), 0); \ 1126 UPDATE_PC_AND_TOS_AND_CONTINUE(1, 1); \ 1127 \ 1128 CASE(_lload_##num): \ 1129 SET_STACK_LONG_FROM_ADDR(LOCALS_LONG_AT(num), 1); \ 1130 UPDATE_PC_AND_TOS_AND_CONTINUE(1, 2); \ 1131 CASE(_dload_##num): \ 1132 SET_STACK_DOUBLE_FROM_ADDR(LOCALS_DOUBLE_AT(num), 1); \ 1133 UPDATE_PC_AND_TOS_AND_CONTINUE(1, 2); 1134 1135 OPC_LOAD_n(0); 1136 OPC_LOAD_n(1); 1137 OPC_LOAD_n(2); 1138 OPC_LOAD_n(3); 1139 1140 /* store to a local variable */ 1141 1142 CASE(_astore): 1143 astore(topOfStack, -1, locals, pc[1]); 1144 UPDATE_PC_AND_TOS_AND_CONTINUE(2, -1); 1145 1146 CASE(_istore): 1147 CASE(_fstore): 1148 SET_LOCALS_SLOT(STACK_SLOT(-1), pc[1]); 1149 UPDATE_PC_AND_TOS_AND_CONTINUE(2, -1); 1150 1151 CASE(_lstore): 1152 SET_LOCALS_LONG(STACK_LONG(-1), pc[1]); 1153 UPDATE_PC_AND_TOS_AND_CONTINUE(2, -2); 1154 1155 CASE(_dstore): 1156 SET_LOCALS_DOUBLE(STACK_DOUBLE(-1), pc[1]); 1157 UPDATE_PC_AND_TOS_AND_CONTINUE(2, -2); 1158 1159 CASE(_wide): { 1160 uint16_t reg = Bytes::get_Java_u2(pc + 2); 1161 1162 opcode = pc[1]; 1163 1164 // Wide and it's sub-bytecode are counted as separate instructions. If we 1165 // don't account for this here, the bytecode trace skips the next bytecode. 1166 DO_UPDATE_INSTRUCTION_COUNT(opcode); 1167 1168 switch(opcode) { 1169 case Bytecodes::_aload: 1170 VERIFY_OOP(LOCALS_OBJECT(reg)); 1171 SET_STACK_OBJECT(LOCALS_OBJECT(reg), 0); 1172 UPDATE_PC_AND_TOS_AND_CONTINUE(4, 1); 1173 1174 case Bytecodes::_iload: 1175 case Bytecodes::_fload: 1176 SET_STACK_SLOT(LOCALS_SLOT(reg), 0); 1177 UPDATE_PC_AND_TOS_AND_CONTINUE(4, 1); 1178 1179 case Bytecodes::_lload: 1180 SET_STACK_LONG_FROM_ADDR(LOCALS_LONG_AT(reg), 1); 1181 UPDATE_PC_AND_TOS_AND_CONTINUE(4, 2); 1182 1183 case Bytecodes::_dload: 1184 SET_STACK_DOUBLE_FROM_ADDR(LOCALS_LONG_AT(reg), 1); 1185 UPDATE_PC_AND_TOS_AND_CONTINUE(4, 2); 1186 1187 case Bytecodes::_astore: 1188 astore(topOfStack, -1, locals, reg); 1189 UPDATE_PC_AND_TOS_AND_CONTINUE(4, -1); 1190 1191 case Bytecodes::_istore: 1192 case Bytecodes::_fstore: 1193 SET_LOCALS_SLOT(STACK_SLOT(-1), reg); 1194 UPDATE_PC_AND_TOS_AND_CONTINUE(4, -1); 1195 1196 case Bytecodes::_lstore: 1197 SET_LOCALS_LONG(STACK_LONG(-1), reg); 1198 UPDATE_PC_AND_TOS_AND_CONTINUE(4, -2); 1199 1200 case Bytecodes::_dstore: 1201 SET_LOCALS_DOUBLE(STACK_DOUBLE(-1), reg); 1202 UPDATE_PC_AND_TOS_AND_CONTINUE(4, -2); 1203 1204 case Bytecodes::_iinc: { 1205 int16_t offset = (int16_t)Bytes::get_Java_u2(pc+4); 1206 // Be nice to see what this generates.... QQQ 1207 SET_LOCALS_INT(LOCALS_INT(reg) + offset, reg); 1208 UPDATE_PC_AND_CONTINUE(6); 1209 } 1210 case Bytecodes::_ret: 1211 // Profile ret. 1212 BI_PROFILE_UPDATE_RET(/*bci=*/((int)(intptr_t)(LOCALS_ADDR(reg)))); 1213 // Now, update the pc. 1214 pc = istate->method()->code_base() + (intptr_t)(LOCALS_ADDR(reg)); 1215 UPDATE_PC_AND_CONTINUE(0); 1216 default: 1217 VM_JAVA_ERROR(vmSymbols::java_lang_InternalError(), "undefined opcode", note_no_trap); 1218 } 1219 } 1220 1221 1222 #undef OPC_STORE_n 1223 #define OPC_STORE_n(num) \ 1224 CASE(_astore_##num): \ 1225 astore(topOfStack, -1, locals, num); \ 1226 UPDATE_PC_AND_TOS_AND_CONTINUE(1, -1); \ 1227 CASE(_istore_##num): \ 1228 CASE(_fstore_##num): \ 1229 SET_LOCALS_SLOT(STACK_SLOT(-1), num); \ 1230 UPDATE_PC_AND_TOS_AND_CONTINUE(1, -1); 1231 1232 OPC_STORE_n(0); 1233 OPC_STORE_n(1); 1234 OPC_STORE_n(2); 1235 OPC_STORE_n(3); 1236 1237 #undef OPC_DSTORE_n 1238 #define OPC_DSTORE_n(num) \ 1239 CASE(_dstore_##num): \ 1240 SET_LOCALS_DOUBLE(STACK_DOUBLE(-1), num); \ 1241 UPDATE_PC_AND_TOS_AND_CONTINUE(1, -2); \ 1242 CASE(_lstore_##num): \ 1243 SET_LOCALS_LONG(STACK_LONG(-1), num); \ 1244 UPDATE_PC_AND_TOS_AND_CONTINUE(1, -2); 1245 1246 OPC_DSTORE_n(0); 1247 OPC_DSTORE_n(1); 1248 OPC_DSTORE_n(2); 1249 OPC_DSTORE_n(3); 1250 1251 /* stack pop, dup, and insert opcodes */ 1252 1253 1254 CASE(_pop): /* Discard the top item on the stack */ 1255 UPDATE_PC_AND_TOS_AND_CONTINUE(1, -1); 1256 1257 1258 CASE(_pop2): /* Discard the top 2 items on the stack */ 1259 UPDATE_PC_AND_TOS_AND_CONTINUE(1, -2); 1260 1261 1262 CASE(_dup): /* Duplicate the top item on the stack */ 1263 dup(topOfStack); 1264 UPDATE_PC_AND_TOS_AND_CONTINUE(1, 1); 1265 1266 CASE(_dup2): /* Duplicate the top 2 items on the stack */ 1267 dup2(topOfStack); 1268 UPDATE_PC_AND_TOS_AND_CONTINUE(1, 2); 1269 1270 CASE(_dup_x1): /* insert top word two down */ 1271 dup_x1(topOfStack); 1272 UPDATE_PC_AND_TOS_AND_CONTINUE(1, 1); 1273 1274 CASE(_dup_x2): /* insert top word three down */ 1275 dup_x2(topOfStack); 1276 UPDATE_PC_AND_TOS_AND_CONTINUE(1, 1); 1277 1278 CASE(_dup2_x1): /* insert top 2 slots three down */ 1279 dup2_x1(topOfStack); 1280 UPDATE_PC_AND_TOS_AND_CONTINUE(1, 2); 1281 1282 CASE(_dup2_x2): /* insert top 2 slots four down */ 1283 dup2_x2(topOfStack); 1284 UPDATE_PC_AND_TOS_AND_CONTINUE(1, 2); 1285 1286 CASE(_swap): { /* swap top two elements on the stack */ 1287 swap(topOfStack); 1288 UPDATE_PC_AND_CONTINUE(1); 1289 } 1290 1291 /* Perform various binary integer operations */ 1292 1293 #undef OPC_INT_BINARY 1294 #define OPC_INT_BINARY(opcname, opname, test) \ 1295 CASE(_i##opcname): \ 1296 if (test && (STACK_INT(-1) == 0)) { \ 1297 VM_JAVA_ERROR(vmSymbols::java_lang_ArithmeticException(), \ 1298 "/ by zero", note_div0Check_trap); \ 1299 } \ 1300 SET_STACK_INT(VMint##opname(STACK_INT(-2), \ 1301 STACK_INT(-1)), \ 1302 -2); \ 1303 UPDATE_PC_AND_TOS_AND_CONTINUE(1, -1); \ 1304 CASE(_l##opcname): \ 1305 { \ 1306 if (test) { \ 1307 jlong l1 = STACK_LONG(-1); \ 1308 if (VMlongEqz(l1)) { \ 1309 VM_JAVA_ERROR(vmSymbols::java_lang_ArithmeticException(), \ 1310 "/ by long zero", note_div0Check_trap); \ 1311 } \ 1312 } \ 1313 /* First long at (-1,-2) next long at (-3,-4) */ \ 1314 SET_STACK_LONG(VMlong##opname(STACK_LONG(-3), \ 1315 STACK_LONG(-1)), \ 1316 -3); \ 1317 UPDATE_PC_AND_TOS_AND_CONTINUE(1, -2); \ 1318 } 1319 1320 OPC_INT_BINARY(add, Add, 0); 1321 OPC_INT_BINARY(sub, Sub, 0); 1322 OPC_INT_BINARY(mul, Mul, 0); 1323 OPC_INT_BINARY(and, And, 0); 1324 OPC_INT_BINARY(or, Or, 0); 1325 OPC_INT_BINARY(xor, Xor, 0); 1326 OPC_INT_BINARY(div, Div, 1); 1327 OPC_INT_BINARY(rem, Rem, 1); 1328 1329 1330 /* Perform various binary floating number operations */ 1331 /* On some machine/platforms/compilers div zero check can be implicit */ 1332 1333 #undef OPC_FLOAT_BINARY 1334 #define OPC_FLOAT_BINARY(opcname, opname) \ 1335 CASE(_d##opcname): { \ 1336 SET_STACK_DOUBLE(VMdouble##opname(STACK_DOUBLE(-3), \ 1337 STACK_DOUBLE(-1)), \ 1338 -3); \ 1339 UPDATE_PC_AND_TOS_AND_CONTINUE(1, -2); \ 1340 } \ 1341 CASE(_f##opcname): \ 1342 SET_STACK_FLOAT(VMfloat##opname(STACK_FLOAT(-2), \ 1343 STACK_FLOAT(-1)), \ 1344 -2); \ 1345 UPDATE_PC_AND_TOS_AND_CONTINUE(1, -1); 1346 1347 1348 OPC_FLOAT_BINARY(add, Add); 1349 OPC_FLOAT_BINARY(sub, Sub); 1350 OPC_FLOAT_BINARY(mul, Mul); 1351 OPC_FLOAT_BINARY(div, Div); 1352 OPC_FLOAT_BINARY(rem, Rem); 1353 1354 /* Shift operations 1355 * Shift left int and long: ishl, lshl 1356 * Logical shift right int and long w/zero extension: iushr, lushr 1357 * Arithmetic shift right int and long w/sign extension: ishr, lshr 1358 */ 1359 1360 #undef OPC_SHIFT_BINARY 1361 #define OPC_SHIFT_BINARY(opcname, opname) \ 1362 CASE(_i##opcname): \ 1363 SET_STACK_INT(VMint##opname(STACK_INT(-2), \ 1364 STACK_INT(-1)), \ 1365 -2); \ 1366 UPDATE_PC_AND_TOS_AND_CONTINUE(1, -1); \ 1367 CASE(_l##opcname): \ 1368 { \ 1369 SET_STACK_LONG(VMlong##opname(STACK_LONG(-2), \ 1370 STACK_INT(-1)), \ 1371 -2); \ 1372 UPDATE_PC_AND_TOS_AND_CONTINUE(1, -1); \ 1373 } 1374 1375 OPC_SHIFT_BINARY(shl, Shl); 1376 OPC_SHIFT_BINARY(shr, Shr); 1377 OPC_SHIFT_BINARY(ushr, Ushr); 1378 1379 /* Increment local variable by constant */ 1380 CASE(_iinc): 1381 { 1382 // locals[pc[1]].j.i += (jbyte)(pc[2]); 1383 SET_LOCALS_INT(LOCALS_INT(pc[1]) + (jbyte)(pc[2]), pc[1]); 1384 UPDATE_PC_AND_CONTINUE(3); 1385 } 1386 1387 /* negate the value on the top of the stack */ 1388 1389 CASE(_ineg): 1390 SET_STACK_INT(VMintNeg(STACK_INT(-1)), -1); 1391 UPDATE_PC_AND_CONTINUE(1); 1392 1393 CASE(_fneg): 1394 SET_STACK_FLOAT(VMfloatNeg(STACK_FLOAT(-1)), -1); 1395 UPDATE_PC_AND_CONTINUE(1); 1396 1397 CASE(_lneg): 1398 { 1399 SET_STACK_LONG(VMlongNeg(STACK_LONG(-1)), -1); 1400 UPDATE_PC_AND_CONTINUE(1); 1401 } 1402 1403 CASE(_dneg): 1404 { 1405 SET_STACK_DOUBLE(VMdoubleNeg(STACK_DOUBLE(-1)), -1); 1406 UPDATE_PC_AND_CONTINUE(1); 1407 } 1408 1409 /* Conversion operations */ 1410 1411 CASE(_i2f): /* convert top of stack int to float */ 1412 SET_STACK_FLOAT(VMint2Float(STACK_INT(-1)), -1); 1413 UPDATE_PC_AND_CONTINUE(1); 1414 1415 CASE(_i2l): /* convert top of stack int to long */ 1416 { 1417 // this is ugly QQQ 1418 jlong r = VMint2Long(STACK_INT(-1)); 1419 MORE_STACK(-1); // Pop 1420 SET_STACK_LONG(r, 1); 1421 1422 UPDATE_PC_AND_TOS_AND_CONTINUE(1, 2); 1423 } 1424 1425 CASE(_i2d): /* convert top of stack int to double */ 1426 { 1427 // this is ugly QQQ (why cast to jlong?? ) 1428 jdouble r = (jlong)STACK_INT(-1); 1429 MORE_STACK(-1); // Pop 1430 SET_STACK_DOUBLE(r, 1); 1431 1432 UPDATE_PC_AND_TOS_AND_CONTINUE(1, 2); 1433 } 1434 1435 CASE(_l2i): /* convert top of stack long to int */ 1436 { 1437 jint r = VMlong2Int(STACK_LONG(-1)); 1438 MORE_STACK(-2); // Pop 1439 SET_STACK_INT(r, 0); 1440 UPDATE_PC_AND_TOS_AND_CONTINUE(1, 1); 1441 } 1442 1443 CASE(_l2f): /* convert top of stack long to float */ 1444 { 1445 jlong r = STACK_LONG(-1); 1446 MORE_STACK(-2); // Pop 1447 SET_STACK_FLOAT(VMlong2Float(r), 0); 1448 UPDATE_PC_AND_TOS_AND_CONTINUE(1, 1); 1449 } 1450 1451 CASE(_l2d): /* convert top of stack long to double */ 1452 { 1453 jlong r = STACK_LONG(-1); 1454 MORE_STACK(-2); // Pop 1455 SET_STACK_DOUBLE(VMlong2Double(r), 1); 1456 UPDATE_PC_AND_TOS_AND_CONTINUE(1, 2); 1457 } 1458 1459 CASE(_f2i): /* Convert top of stack float to int */ 1460 SET_STACK_INT(SharedRuntime::f2i(STACK_FLOAT(-1)), -1); 1461 UPDATE_PC_AND_CONTINUE(1); 1462 1463 CASE(_f2l): /* convert top of stack float to long */ 1464 { 1465 jlong r = SharedRuntime::f2l(STACK_FLOAT(-1)); 1466 MORE_STACK(-1); // POP 1467 SET_STACK_LONG(r, 1); 1468 UPDATE_PC_AND_TOS_AND_CONTINUE(1, 2); 1469 } 1470 1471 CASE(_f2d): /* convert top of stack float to double */ 1472 { 1473 jfloat f; 1474 jdouble r; 1475 f = STACK_FLOAT(-1); 1476 r = (jdouble) f; 1477 MORE_STACK(-1); // POP 1478 SET_STACK_DOUBLE(r, 1); 1479 UPDATE_PC_AND_TOS_AND_CONTINUE(1, 2); 1480 } 1481 1482 CASE(_d2i): /* convert top of stack double to int */ 1483 { 1484 jint r1 = SharedRuntime::d2i(STACK_DOUBLE(-1)); 1485 MORE_STACK(-2); 1486 SET_STACK_INT(r1, 0); 1487 UPDATE_PC_AND_TOS_AND_CONTINUE(1, 1); 1488 } 1489 1490 CASE(_d2f): /* convert top of stack double to float */ 1491 { 1492 jfloat r1 = VMdouble2Float(STACK_DOUBLE(-1)); 1493 MORE_STACK(-2); 1494 SET_STACK_FLOAT(r1, 0); 1495 UPDATE_PC_AND_TOS_AND_CONTINUE(1, 1); 1496 } 1497 1498 CASE(_d2l): /* convert top of stack double to long */ 1499 { 1500 jlong r1 = SharedRuntime::d2l(STACK_DOUBLE(-1)); 1501 MORE_STACK(-2); 1502 SET_STACK_LONG(r1, 1); 1503 UPDATE_PC_AND_TOS_AND_CONTINUE(1, 2); 1504 } 1505 1506 CASE(_i2b): 1507 SET_STACK_INT(VMint2Byte(STACK_INT(-1)), -1); 1508 UPDATE_PC_AND_CONTINUE(1); 1509 1510 CASE(_i2c): 1511 SET_STACK_INT(VMint2Char(STACK_INT(-1)), -1); 1512 UPDATE_PC_AND_CONTINUE(1); 1513 1514 CASE(_i2s): 1515 SET_STACK_INT(VMint2Short(STACK_INT(-1)), -1); 1516 UPDATE_PC_AND_CONTINUE(1); 1517 1518 /* comparison operators */ 1519 1520 1521 #define COMPARISON_OP(name, comparison) \ 1522 CASE(_if_icmp##name): { \ 1523 const bool cmp = (STACK_INT(-2) comparison STACK_INT(-1)); \ 1524 int skip = cmp \ 1525 ? (int16_t)Bytes::get_Java_u2(pc + 1) : 3; \ 1526 address branch_pc = pc; \ 1527 /* Profile branch. */ \ 1528 BI_PROFILE_UPDATE_BRANCH(/*is_taken=*/cmp); \ 1529 UPDATE_PC_AND_TOS(skip, -2); \ 1530 DO_BACKEDGE_CHECKS(skip, branch_pc); \ 1531 CONTINUE; \ 1532 } \ 1533 CASE(_if##name): { \ 1534 const bool cmp = (STACK_INT(-1) comparison 0); \ 1535 int skip = cmp \ 1536 ? (int16_t)Bytes::get_Java_u2(pc + 1) : 3; \ 1537 address branch_pc = pc; \ 1538 /* Profile branch. */ \ 1539 BI_PROFILE_UPDATE_BRANCH(/*is_taken=*/cmp); \ 1540 UPDATE_PC_AND_TOS(skip, -1); \ 1541 DO_BACKEDGE_CHECKS(skip, branch_pc); \ 1542 CONTINUE; \ 1543 } 1544 1545 #define COMPARISON_OP2(name, comparison) \ 1546 COMPARISON_OP(name, comparison) \ 1547 CASE(_if_acmp##name): { \ 1548 const bool cmp = (STACK_OBJECT(-2) comparison STACK_OBJECT(-1)); \ 1549 int skip = cmp \ 1550 ? (int16_t)Bytes::get_Java_u2(pc + 1) : 3; \ 1551 address branch_pc = pc; \ 1552 /* Profile branch. */ \ 1553 BI_PROFILE_UPDATE_BRANCH(/*is_taken=*/cmp); \ 1554 UPDATE_PC_AND_TOS(skip, -2); \ 1555 DO_BACKEDGE_CHECKS(skip, branch_pc); \ 1556 CONTINUE; \ 1557 } 1558 1559 #define NULL_COMPARISON_NOT_OP(name) \ 1560 CASE(_if##name): { \ 1561 const bool cmp = (!(STACK_OBJECT(-1) == NULL)); \ 1562 int skip = cmp \ 1563 ? (int16_t)Bytes::get_Java_u2(pc + 1) : 3; \ 1564 address branch_pc = pc; \ 1565 /* Profile branch. */ \ 1566 BI_PROFILE_UPDATE_BRANCH(/*is_taken=*/cmp); \ 1567 UPDATE_PC_AND_TOS(skip, -1); \ 1568 DO_BACKEDGE_CHECKS(skip, branch_pc); \ 1569 CONTINUE; \ 1570 } 1571 1572 #define NULL_COMPARISON_OP(name) \ 1573 CASE(_if##name): { \ 1574 const bool cmp = ((STACK_OBJECT(-1) == NULL)); \ 1575 int skip = cmp \ 1576 ? (int16_t)Bytes::get_Java_u2(pc + 1) : 3; \ 1577 address branch_pc = pc; \ 1578 /* Profile branch. */ \ 1579 BI_PROFILE_UPDATE_BRANCH(/*is_taken=*/cmp); \ 1580 UPDATE_PC_AND_TOS(skip, -1); \ 1581 DO_BACKEDGE_CHECKS(skip, branch_pc); \ 1582 CONTINUE; \ 1583 } 1584 COMPARISON_OP(lt, <); 1585 COMPARISON_OP(gt, >); 1586 COMPARISON_OP(le, <=); 1587 COMPARISON_OP(ge, >=); 1588 COMPARISON_OP2(eq, ==); /* include ref comparison */ 1589 COMPARISON_OP2(ne, !=); /* include ref comparison */ 1590 NULL_COMPARISON_OP(null); 1591 NULL_COMPARISON_NOT_OP(nonnull); 1592 1593 /* Goto pc at specified offset in switch table. */ 1594 1595 CASE(_tableswitch): { 1596 jint* lpc = (jint*)VMalignWordUp(pc+1); 1597 int32_t key = STACK_INT(-1); 1598 int32_t low = Bytes::get_Java_u4((address)&lpc[1]); 1599 int32_t high = Bytes::get_Java_u4((address)&lpc[2]); 1600 int32_t skip; 1601 key -= low; 1602 if (((uint32_t) key > (uint32_t)(high - low))) { 1603 key = -1; 1604 skip = Bytes::get_Java_u4((address)&lpc[0]); 1605 } else { 1606 skip = Bytes::get_Java_u4((address)&lpc[key + 3]); 1607 } 1608 // Profile switch. 1609 BI_PROFILE_UPDATE_SWITCH(/*switch_index=*/key); 1610 // Does this really need a full backedge check (osr)? 1611 address branch_pc = pc; 1612 UPDATE_PC_AND_TOS(skip, -1); 1613 DO_BACKEDGE_CHECKS(skip, branch_pc); 1614 CONTINUE; 1615 } 1616 1617 /* Goto pc whose table entry matches specified key. */ 1618 1619 CASE(_lookupswitch): { 1620 jint* lpc = (jint*)VMalignWordUp(pc+1); 1621 int32_t key = STACK_INT(-1); 1622 int32_t skip = Bytes::get_Java_u4((address) lpc); /* default amount */ 1623 // Remember index. 1624 int index = -1; 1625 int newindex = 0; 1626 int32_t npairs = Bytes::get_Java_u4((address) &lpc[1]); 1627 while (--npairs >= 0) { 1628 lpc += 2; 1629 if (key == (int32_t)Bytes::get_Java_u4((address)lpc)) { 1630 skip = Bytes::get_Java_u4((address)&lpc[1]); 1631 index = newindex; 1632 break; 1633 } 1634 newindex += 1; 1635 } 1636 // Profile switch. 1637 BI_PROFILE_UPDATE_SWITCH(/*switch_index=*/index); 1638 address branch_pc = pc; 1639 UPDATE_PC_AND_TOS(skip, -1); 1640 DO_BACKEDGE_CHECKS(skip, branch_pc); 1641 CONTINUE; 1642 } 1643 1644 CASE(_fcmpl): 1645 CASE(_fcmpg): 1646 { 1647 SET_STACK_INT(VMfloatCompare(STACK_FLOAT(-2), 1648 STACK_FLOAT(-1), 1649 (opcode == Bytecodes::_fcmpl ? -1 : 1)), 1650 -2); 1651 UPDATE_PC_AND_TOS_AND_CONTINUE(1, -1); 1652 } 1653 1654 CASE(_dcmpl): 1655 CASE(_dcmpg): 1656 { 1657 int r = VMdoubleCompare(STACK_DOUBLE(-3), 1658 STACK_DOUBLE(-1), 1659 (opcode == Bytecodes::_dcmpl ? -1 : 1)); 1660 MORE_STACK(-4); // Pop 1661 SET_STACK_INT(r, 0); 1662 UPDATE_PC_AND_TOS_AND_CONTINUE(1, 1); 1663 } 1664 1665 CASE(_lcmp): 1666 { 1667 int r = VMlongCompare(STACK_LONG(-3), STACK_LONG(-1)); 1668 MORE_STACK(-4); 1669 SET_STACK_INT(r, 0); 1670 UPDATE_PC_AND_TOS_AND_CONTINUE(1, 1); 1671 } 1672 1673 1674 /* Return from a method */ 1675 1676 CASE(_areturn): 1677 CASE(_ireturn): 1678 CASE(_freturn): 1679 { 1680 // Allow a safepoint before returning to frame manager. 1681 SAFEPOINT; 1682 1683 goto handle_return; 1684 } 1685 1686 CASE(_lreturn): 1687 CASE(_dreturn): 1688 { 1689 // Allow a safepoint before returning to frame manager. 1690 SAFEPOINT; 1691 goto handle_return; 1692 } 1693 1694 CASE(_return_register_finalizer): { 1695 1696 oop rcvr = LOCALS_OBJECT(0); 1697 VERIFY_OOP(rcvr); 1698 if (rcvr->klass()->has_finalizer()) { 1699 CALL_VM(InterpreterRuntime::register_finalizer(THREAD, rcvr), handle_exception); 1700 } 1701 goto handle_return; 1702 } 1703 CASE(_return): { 1704 1705 // Allow a safepoint before returning to frame manager. 1706 SAFEPOINT; 1707 goto handle_return; 1708 } 1709 1710 /* Array access byte-codes */ 1711 1712 /* Every array access byte-code starts out like this */ 1713 // arrayOopDesc* arrObj = (arrayOopDesc*)STACK_OBJECT(arrayOff); 1714 #define ARRAY_INTRO(arrayOff) \ 1715 arrayOop arrObj = (arrayOop)STACK_OBJECT(arrayOff); \ 1716 jint index = STACK_INT(arrayOff + 1); \ 1717 char message[jintAsStringSize]; \ 1718 CHECK_NULL(arrObj); \ 1719 if ((uint32_t)index >= (uint32_t)arrObj->length()) { \ 1720 sprintf(message, "%d", index); \ 1721 VM_JAVA_ERROR(vmSymbols::java_lang_ArrayIndexOutOfBoundsException(), \ 1722 message, note_rangeCheck_trap); \ 1723 } 1724 1725 /* 32-bit loads. These handle conversion from < 32-bit types */ 1726 #define ARRAY_LOADTO32(T, T2, format, stackRes, extra) \ 1727 { \ 1728 ARRAY_INTRO(-2); \ 1729 (void)extra; \ 1730 SET_ ## stackRes(*(T2 *)(((address) arrObj->base(T)) + index * sizeof(T2)), \ 1731 -2); \ 1732 UPDATE_PC_AND_TOS_AND_CONTINUE(1, -1); \ 1733 } 1734 1735 /* 64-bit loads */ 1736 #define ARRAY_LOADTO64(T,T2, stackRes, extra) \ 1737 { \ 1738 ARRAY_INTRO(-2); \ 1739 SET_ ## stackRes(*(T2 *)(((address) arrObj->base(T)) + index * sizeof(T2)), -1); \ 1740 (void)extra; \ 1741 UPDATE_PC_AND_CONTINUE(1); \ 1742 } 1743 1744 CASE(_iaload): 1745 ARRAY_LOADTO32(T_INT, jint, "%d", STACK_INT, 0); 1746 CASE(_faload): 1747 ARRAY_LOADTO32(T_FLOAT, jfloat, "%f", STACK_FLOAT, 0); 1748 CASE(_aaload): { 1749 ARRAY_INTRO(-2); 1750 SET_STACK_OBJECT(((objArrayOop) arrObj)->obj_at(index), -2); 1751 UPDATE_PC_AND_TOS_AND_CONTINUE(1, -1); 1752 } 1753 CASE(_baload): 1754 ARRAY_LOADTO32(T_BYTE, jbyte, "%d", STACK_INT, 0); 1755 CASE(_caload): 1756 ARRAY_LOADTO32(T_CHAR, jchar, "%d", STACK_INT, 0); 1757 CASE(_saload): 1758 ARRAY_LOADTO32(T_SHORT, jshort, "%d", STACK_INT, 0); 1759 CASE(_laload): 1760 ARRAY_LOADTO64(T_LONG, jlong, STACK_LONG, 0); 1761 CASE(_daload): 1762 ARRAY_LOADTO64(T_DOUBLE, jdouble, STACK_DOUBLE, 0); 1763 1764 /* 32-bit stores. These handle conversion to < 32-bit types */ 1765 #define ARRAY_STOREFROM32(T, T2, format, stackSrc, extra) \ 1766 { \ 1767 ARRAY_INTRO(-3); \ 1768 (void)extra; \ 1769 *(T2 *)(((address) arrObj->base(T)) + index * sizeof(T2)) = stackSrc( -1); \ 1770 UPDATE_PC_AND_TOS_AND_CONTINUE(1, -3); \ 1771 } 1772 1773 /* 64-bit stores */ 1774 #define ARRAY_STOREFROM64(T, T2, stackSrc, extra) \ 1775 { \ 1776 ARRAY_INTRO(-4); \ 1777 (void)extra; \ 1778 *(T2 *)(((address) arrObj->base(T)) + index * sizeof(T2)) = stackSrc( -1); \ 1779 UPDATE_PC_AND_TOS_AND_CONTINUE(1, -4); \ 1780 } 1781 1782 CASE(_iastore): 1783 ARRAY_STOREFROM32(T_INT, jint, "%d", STACK_INT, 0); 1784 CASE(_fastore): 1785 ARRAY_STOREFROM32(T_FLOAT, jfloat, "%f", STACK_FLOAT, 0); 1786 /* 1787 * This one looks different because of the assignability check 1788 */ 1789 CASE(_aastore): { 1790 oop rhsObject = STACK_OBJECT(-1); 1791 VERIFY_OOP(rhsObject); 1792 ARRAY_INTRO( -3); 1793 // arrObj, index are set 1794 if (rhsObject != NULL) { 1795 /* Check assignability of rhsObject into arrObj */ 1796 Klass* rhsKlass = rhsObject->klass(); // EBX (subclass) 1797 Klass* elemKlass = ObjArrayKlass::cast(arrObj->klass())->element_klass(); // superklass EAX 1798 // 1799 // Check for compatibilty. This check must not GC!! 1800 // Seems way more expensive now that we must dispatch 1801 // 1802 if (rhsKlass != elemKlass && !rhsKlass->is_subtype_of(elemKlass)) { // ebx->is... 1803 // Decrement counter if subtype check failed. 1804 BI_PROFILE_SUBTYPECHECK_FAILED(rhsKlass); 1805 VM_JAVA_ERROR(vmSymbols::java_lang_ArrayStoreException(), "", note_arrayCheck_trap); 1806 } 1807 // Profile checkcast with null_seen and receiver. 1808 BI_PROFILE_UPDATE_CHECKCAST(/*null_seen=*/false, rhsKlass); 1809 } else { 1810 // Profile checkcast with null_seen and receiver. 1811 BI_PROFILE_UPDATE_CHECKCAST(/*null_seen=*/true, NULL); 1812 } 1813 ((objArrayOop) arrObj)->obj_at_put(index, rhsObject); 1814 UPDATE_PC_AND_TOS_AND_CONTINUE(1, -3); 1815 } 1816 CASE(_bastore): 1817 ARRAY_STOREFROM32(T_BYTE, jbyte, "%d", STACK_INT, 0); 1818 CASE(_castore): 1819 ARRAY_STOREFROM32(T_CHAR, jchar, "%d", STACK_INT, 0); 1820 CASE(_sastore): 1821 ARRAY_STOREFROM32(T_SHORT, jshort, "%d", STACK_INT, 0); 1822 CASE(_lastore): 1823 ARRAY_STOREFROM64(T_LONG, jlong, STACK_LONG, 0); 1824 CASE(_dastore): 1825 ARRAY_STOREFROM64(T_DOUBLE, jdouble, STACK_DOUBLE, 0); 1826 1827 CASE(_arraylength): 1828 { 1829 arrayOop ary = (arrayOop) STACK_OBJECT(-1); 1830 CHECK_NULL(ary); 1831 SET_STACK_INT(ary->length(), -1); 1832 UPDATE_PC_AND_CONTINUE(1); 1833 } 1834 1835 /* monitorenter and monitorexit for locking/unlocking an object */ 1836 1837 CASE(_monitorenter): { 1838 oop lockee = STACK_OBJECT(-1); 1839 // derefing's lockee ought to provoke implicit null check 1840 CHECK_NULL(lockee); 1841 // find a free monitor or one already allocated for this object 1842 // if we find a matching object then we need a new monitor 1843 // since this is recursive enter 1844 BasicObjectLock* limit = istate->monitor_base(); 1845 BasicObjectLock* most_recent = (BasicObjectLock*) istate->stack_base(); 1846 BasicObjectLock* entry = NULL; 1847 while (most_recent != limit ) { 1848 if (most_recent->obj() == NULL) entry = most_recent; 1849 else if (most_recent->obj() == lockee) break; 1850 most_recent++; 1851 } 1852 if (entry != NULL) { 1853 entry->set_obj(lockee); 1854 int success = false; 1855 uintptr_t epoch_mask_in_place = (uintptr_t)markOopDesc::epoch_mask_in_place; 1856 1857 markOop mark = lockee->mark(); 1858 intptr_t hash = (intptr_t) markOopDesc::no_hash; 1859 // implies UseBiasedLocking 1860 if (mark->has_bias_pattern()) { 1861 uintptr_t thread_ident; 1862 uintptr_t anticipated_bias_locking_value; 1863 thread_ident = (uintptr_t)istate->thread(); 1864 anticipated_bias_locking_value = 1865 (((uintptr_t)lockee->klass()->prototype_header() | thread_ident) ^ (uintptr_t)mark) & 1866 ~((uintptr_t) markOopDesc::age_mask_in_place); 1867 1868 if (anticipated_bias_locking_value == 0) { 1869 // already biased towards this thread, nothing to do 1870 if (PrintBiasedLockingStatistics) { 1871 (* BiasedLocking::biased_lock_entry_count_addr())++; 1872 } 1873 success = true; 1874 } 1875 else if ((anticipated_bias_locking_value & markOopDesc::biased_lock_mask_in_place) != 0) { 1876 // try revoke bias 1877 markOop header = lockee->klass()->prototype_header(); 1878 if (hash != markOopDesc::no_hash) { 1879 header = header->copy_set_hash(hash); 1880 } 1881 if (Atomic::cmpxchg_ptr(header, lockee->mark_addr(), mark) == mark) { 1882 if (PrintBiasedLockingStatistics) 1883 (*BiasedLocking::revoked_lock_entry_count_addr())++; 1884 } 1885 } 1886 else if ((anticipated_bias_locking_value & epoch_mask_in_place) !=0) { 1887 // try rebias 1888 markOop new_header = (markOop) ( (intptr_t) lockee->klass()->prototype_header() | thread_ident); 1889 if (hash != markOopDesc::no_hash) { 1890 new_header = new_header->copy_set_hash(hash); 1891 } 1892 if (Atomic::cmpxchg_ptr((void*)new_header, lockee->mark_addr(), mark) == mark) { 1893 if (PrintBiasedLockingStatistics) 1894 (* BiasedLocking::rebiased_lock_entry_count_addr())++; 1895 } 1896 else { 1897 CALL_VM(InterpreterRuntime::monitorenter(THREAD, entry), handle_exception); 1898 } 1899 success = true; 1900 } 1901 else { 1902 // try to bias towards thread in case object is anonymously biased 1903 markOop header = (markOop) ((uintptr_t) mark & ((uintptr_t)markOopDesc::biased_lock_mask_in_place | 1904 (uintptr_t)markOopDesc::age_mask_in_place | 1905 epoch_mask_in_place)); 1906 if (hash != markOopDesc::no_hash) { 1907 header = header->copy_set_hash(hash); 1908 } 1909 markOop new_header = (markOop) ((uintptr_t) header | thread_ident); 1910 // debugging hint 1911 DEBUG_ONLY(entry->lock()->set_displaced_header((markOop) (uintptr_t) 0xdeaddead);) 1912 if (Atomic::cmpxchg_ptr((void*)new_header, lockee->mark_addr(), header) == header) { 1913 if (PrintBiasedLockingStatistics) 1914 (* BiasedLocking::anonymously_biased_lock_entry_count_addr())++; 1915 } 1916 else { 1917 CALL_VM(InterpreterRuntime::monitorenter(THREAD, entry), handle_exception); 1918 } 1919 success = true; 1920 } 1921 } 1922 1923 // traditional lightweight locking 1924 if (!success) { 1925 markOop displaced = lockee->mark()->set_unlocked(); 1926 entry->lock()->set_displaced_header(displaced); 1927 bool call_vm = UseHeavyMonitors; 1928 if (call_vm || Atomic::cmpxchg_ptr(entry, lockee->mark_addr(), displaced) != displaced) { 1929 // Is it simple recursive case? 1930 if (!call_vm && THREAD->is_lock_owned((address) displaced->clear_lock_bits())) { 1931 entry->lock()->set_displaced_header(NULL); 1932 } else { 1933 CALL_VM(InterpreterRuntime::monitorenter(THREAD, entry), handle_exception); 1934 } 1935 } 1936 } 1937 UPDATE_PC_AND_TOS_AND_CONTINUE(1, -1); 1938 } else { 1939 istate->set_msg(more_monitors); 1940 UPDATE_PC_AND_RETURN(0); // Re-execute 1941 } 1942 } 1943 1944 CASE(_monitorexit): { 1945 oop lockee = STACK_OBJECT(-1); 1946 CHECK_NULL(lockee); 1947 // derefing's lockee ought to provoke implicit null check 1948 // find our monitor slot 1949 BasicObjectLock* limit = istate->monitor_base(); 1950 BasicObjectLock* most_recent = (BasicObjectLock*) istate->stack_base(); 1951 while (most_recent != limit ) { 1952 if ((most_recent)->obj() == lockee) { 1953 BasicLock* lock = most_recent->lock(); 1954 markOop header = lock->displaced_header(); 1955 most_recent->set_obj(NULL); 1956 if (!lockee->mark()->has_bias_pattern()) { 1957 bool call_vm = UseHeavyMonitors; 1958 // If it isn't recursive we either must swap old header or call the runtime 1959 if (header != NULL || call_vm) { 1960 if (call_vm || Atomic::cmpxchg_ptr(header, lockee->mark_addr(), lock) != lock) { 1961 // restore object for the slow case 1962 most_recent->set_obj(lockee); 1963 CALL_VM(InterpreterRuntime::monitorexit(THREAD, most_recent), handle_exception); 1964 } 1965 } 1966 } 1967 UPDATE_PC_AND_TOS_AND_CONTINUE(1, -1); 1968 } 1969 most_recent++; 1970 } 1971 // Need to throw illegal monitor state exception 1972 CALL_VM(InterpreterRuntime::throw_illegal_monitor_state_exception(THREAD), handle_exception); 1973 ShouldNotReachHere(); 1974 } 1975 1976 /* All of the non-quick opcodes. */ 1977 1978 /* -Set clobbersCpIndex true if the quickened opcode clobbers the 1979 * constant pool index in the instruction. 1980 */ 1981 CASE(_getfield): 1982 CASE(_getstatic): 1983 { 1984 u2 index; 1985 ConstantPoolCacheEntry* cache; 1986 index = Bytes::get_native_u2(pc+1); 1987 1988 // QQQ Need to make this as inlined as possible. Probably need to 1989 // split all the bytecode cases out so c++ compiler has a chance 1990 // for constant prop to fold everything possible away. 1991 1992 cache = cp->entry_at(index); 1993 if (!cache->is_resolved((Bytecodes::Code)opcode)) { 1994 CALL_VM(InterpreterRuntime::resolve_get_put(THREAD, (Bytecodes::Code)opcode), 1995 handle_exception); 1996 cache = cp->entry_at(index); 1997 } 1998 1999 #ifdef VM_JVMTI 2000 if (_jvmti_interp_events) { 2001 int *count_addr; 2002 oop obj; 2003 // Check to see if a field modification watch has been set 2004 // before we take the time to call into the VM. 2005 count_addr = (int *)JvmtiExport::get_field_access_count_addr(); 2006 if ( *count_addr > 0 ) { 2007 if ((Bytecodes::Code)opcode == Bytecodes::_getstatic) { 2008 obj = (oop)NULL; 2009 } else { 2010 obj = (oop) STACK_OBJECT(-1); 2011 VERIFY_OOP(obj); 2012 } 2013 CALL_VM(InterpreterRuntime::post_field_access(THREAD, 2014 obj, 2015 cache), 2016 handle_exception); 2017 } 2018 } 2019 #endif /* VM_JVMTI */ 2020 2021 oop obj; 2022 if ((Bytecodes::Code)opcode == Bytecodes::_getstatic) { 2023 Klass* k = cache->f1_as_klass(); 2024 obj = k->java_mirror(); 2025 MORE_STACK(1); // Assume single slot push 2026 } else { 2027 obj = (oop) STACK_OBJECT(-1); 2028 CHECK_NULL(obj); 2029 } 2030 2031 // 2032 // Now store the result on the stack 2033 // 2034 TosState tos_type = cache->flag_state(); 2035 int field_offset = cache->f2_as_index(); 2036 if (cache->is_volatile()) { 2037 if (tos_type == atos) { 2038 VERIFY_OOP(obj->obj_field_acquire(field_offset)); 2039 SET_STACK_OBJECT(obj->obj_field_acquire(field_offset), -1); 2040 } else if (tos_type == itos) { 2041 SET_STACK_INT(obj->int_field_acquire(field_offset), -1); 2042 } else if (tos_type == ltos) { 2043 SET_STACK_LONG(obj->long_field_acquire(field_offset), 0); 2044 MORE_STACK(1); 2045 } else if (tos_type == btos) { 2046 SET_STACK_INT(obj->byte_field_acquire(field_offset), -1); 2047 } else if (tos_type == ctos) { 2048 SET_STACK_INT(obj->char_field_acquire(field_offset), -1); 2049 } else if (tos_type == stos) { 2050 SET_STACK_INT(obj->short_field_acquire(field_offset), -1); 2051 } else if (tos_type == ftos) { 2052 SET_STACK_FLOAT(obj->float_field_acquire(field_offset), -1); 2053 } else { 2054 SET_STACK_DOUBLE(obj->double_field_acquire(field_offset), 0); 2055 MORE_STACK(1); 2056 } 2057 } else { 2058 if (tos_type == atos) { 2059 VERIFY_OOP(obj->obj_field(field_offset)); 2060 SET_STACK_OBJECT(obj->obj_field(field_offset), -1); 2061 } else if (tos_type == itos) { 2062 SET_STACK_INT(obj->int_field(field_offset), -1); 2063 } else if (tos_type == ltos) { 2064 SET_STACK_LONG(obj->long_field(field_offset), 0); 2065 MORE_STACK(1); 2066 } else if (tos_type == btos) { 2067 SET_STACK_INT(obj->byte_field(field_offset), -1); 2068 } else if (tos_type == ctos) { 2069 SET_STACK_INT(obj->char_field(field_offset), -1); 2070 } else if (tos_type == stos) { 2071 SET_STACK_INT(obj->short_field(field_offset), -1); 2072 } else if (tos_type == ftos) { 2073 SET_STACK_FLOAT(obj->float_field(field_offset), -1); 2074 } else { 2075 SET_STACK_DOUBLE(obj->double_field(field_offset), 0); 2076 MORE_STACK(1); 2077 } 2078 } 2079 2080 UPDATE_PC_AND_CONTINUE(3); 2081 } 2082 2083 CASE(_putfield): 2084 CASE(_putstatic): 2085 { 2086 u2 index = Bytes::get_native_u2(pc+1); 2087 ConstantPoolCacheEntry* cache = cp->entry_at(index); 2088 if (!cache->is_resolved((Bytecodes::Code)opcode)) { 2089 CALL_VM(InterpreterRuntime::resolve_get_put(THREAD, (Bytecodes::Code)opcode), 2090 handle_exception); 2091 cache = cp->entry_at(index); 2092 } 2093 2094 #ifdef VM_JVMTI 2095 if (_jvmti_interp_events) { 2096 int *count_addr; 2097 oop obj; 2098 // Check to see if a field modification watch has been set 2099 // before we take the time to call into the VM. 2100 count_addr = (int *)JvmtiExport::get_field_modification_count_addr(); 2101 if ( *count_addr > 0 ) { 2102 if ((Bytecodes::Code)opcode == Bytecodes::_putstatic) { 2103 obj = (oop)NULL; 2104 } 2105 else { 2106 if (cache->is_long() || cache->is_double()) { 2107 obj = (oop) STACK_OBJECT(-3); 2108 } else { 2109 obj = (oop) STACK_OBJECT(-2); 2110 } 2111 VERIFY_OOP(obj); 2112 } 2113 2114 CALL_VM(InterpreterRuntime::post_field_modification(THREAD, 2115 obj, 2116 cache, 2117 (jvalue *)STACK_SLOT(-1)), 2118 handle_exception); 2119 } 2120 } 2121 #endif /* VM_JVMTI */ 2122 2123 // QQQ Need to make this as inlined as possible. Probably need to split all the bytecode cases 2124 // out so c++ compiler has a chance for constant prop to fold everything possible away. 2125 2126 oop obj; 2127 int count; 2128 TosState tos_type = cache->flag_state(); 2129 2130 count = -1; 2131 if (tos_type == ltos || tos_type == dtos) { 2132 --count; 2133 } 2134 if ((Bytecodes::Code)opcode == Bytecodes::_putstatic) { 2135 Klass* k = cache->f1_as_klass(); 2136 obj = k->java_mirror(); 2137 } else { 2138 --count; 2139 obj = (oop) STACK_OBJECT(count); 2140 CHECK_NULL(obj); 2141 } 2142 2143 // 2144 // Now store the result 2145 // 2146 int field_offset = cache->f2_as_index(); 2147 if (cache->is_volatile()) { 2148 if (tos_type == itos) { 2149 obj->release_int_field_put(field_offset, STACK_INT(-1)); 2150 } else if (tos_type == atos) { 2151 VERIFY_OOP(STACK_OBJECT(-1)); 2152 obj->release_obj_field_put(field_offset, STACK_OBJECT(-1)); 2153 } else if (tos_type == btos) { 2154 obj->release_byte_field_put(field_offset, STACK_INT(-1)); 2155 } else if (tos_type == ltos) { 2156 obj->release_long_field_put(field_offset, STACK_LONG(-1)); 2157 } else if (tos_type == ctos) { 2158 obj->release_char_field_put(field_offset, STACK_INT(-1)); 2159 } else if (tos_type == stos) { 2160 obj->release_short_field_put(field_offset, STACK_INT(-1)); 2161 } else if (tos_type == ftos) { 2162 obj->release_float_field_put(field_offset, STACK_FLOAT(-1)); 2163 } else { 2164 obj->release_double_field_put(field_offset, STACK_DOUBLE(-1)); 2165 } 2166 OrderAccess::storeload(); 2167 } else { 2168 if (tos_type == itos) { 2169 obj->int_field_put(field_offset, STACK_INT(-1)); 2170 } else if (tos_type == atos) { 2171 VERIFY_OOP(STACK_OBJECT(-1)); 2172 obj->obj_field_put(field_offset, STACK_OBJECT(-1)); 2173 } else if (tos_type == btos) { 2174 obj->byte_field_put(field_offset, STACK_INT(-1)); 2175 } else if (tos_type == ltos) { 2176 obj->long_field_put(field_offset, STACK_LONG(-1)); 2177 } else if (tos_type == ctos) { 2178 obj->char_field_put(field_offset, STACK_INT(-1)); 2179 } else if (tos_type == stos) { 2180 obj->short_field_put(field_offset, STACK_INT(-1)); 2181 } else if (tos_type == ftos) { 2182 obj->float_field_put(field_offset, STACK_FLOAT(-1)); 2183 } else { 2184 obj->double_field_put(field_offset, STACK_DOUBLE(-1)); 2185 } 2186 } 2187 2188 UPDATE_PC_AND_TOS_AND_CONTINUE(3, count); 2189 } 2190 2191 CASE(_new): { 2192 u2 index = Bytes::get_Java_u2(pc+1); 2193 ConstantPool* constants = istate->method()->constants(); 2194 if (!constants->tag_at(index).is_unresolved_klass()) { 2195 // Make sure klass is initialized and doesn't have a finalizer 2196 Klass* entry = constants->slot_at(index).get_klass(); 2197 assert(entry->is_klass(), "Should be resolved klass"); 2198 Klass* k_entry = (Klass*) entry; 2199 assert(k_entry->oop_is_instance(), "Should be InstanceKlass"); 2200 InstanceKlass* ik = (InstanceKlass*) k_entry; 2201 if ( ik->is_initialized() && ik->can_be_fastpath_allocated() ) { 2202 size_t obj_size = ik->size_helper(); 2203 oop result = NULL; 2204 // If the TLAB isn't pre-zeroed then we'll have to do it 2205 bool need_zero = !ZeroTLAB; 2206 if (UseTLAB) { 2207 result = (oop) THREAD->tlab().allocate(obj_size); 2208 } 2209 // Disable non-TLAB-based fast-path, because profiling requires that all 2210 // allocations go through InterpreterRuntime::_new() if THREAD->tlab().allocate 2211 // returns NULL. 2212 #ifndef CC_INTERP_PROFILE 2213 if (result == NULL) { 2214 need_zero = true; 2215 // Try allocate in shared eden 2216 retry: 2217 HeapWord* compare_to = *Universe::heap()->top_addr(); 2218 HeapWord* new_top = compare_to + obj_size; 2219 if (new_top <= *Universe::heap()->end_addr()) { 2220 if (Atomic::cmpxchg_ptr(new_top, Universe::heap()->top_addr(), compare_to) != compare_to) { 2221 goto retry; 2222 } 2223 result = (oop) compare_to; 2224 } 2225 } 2226 #endif 2227 if (result != NULL) { 2228 // Initialize object (if nonzero size and need) and then the header 2229 if (need_zero ) { 2230 HeapWord* to_zero = (HeapWord*) result + sizeof(oopDesc) / oopSize; 2231 obj_size -= sizeof(oopDesc) / oopSize; 2232 if (obj_size > 0 ) { 2233 memset(to_zero, 0, obj_size * HeapWordSize); 2234 } 2235 } 2236 if (UseBiasedLocking) { 2237 result->set_mark(ik->prototype_header()); 2238 } else { 2239 result->set_mark(markOopDesc::prototype()); 2240 } 2241 result->set_klass_gap(0); 2242 result->set_klass(k_entry); 2243 // Must prevent reordering of stores for object initialization 2244 // with stores that publish the new object. 2245 OrderAccess::storestore(); 2246 SET_STACK_OBJECT(result, 0); 2247 UPDATE_PC_AND_TOS_AND_CONTINUE(3, 1); 2248 } 2249 } 2250 } 2251 // Slow case allocation 2252 CALL_VM(InterpreterRuntime::_new(THREAD, METHOD->constants(), index), 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(), 0); 2258 THREAD->set_vm_result(NULL); 2259 UPDATE_PC_AND_TOS_AND_CONTINUE(3, 1); 2260 } 2261 CASE(_anewarray): { 2262 u2 index = Bytes::get_Java_u2(pc+1); 2263 jint size = STACK_INT(-1); 2264 CALL_VM(InterpreterRuntime::anewarray(THREAD, METHOD->constants(), index, size), 2265 handle_exception); 2266 // Must prevent reordering of stores for object initialization 2267 // with stores that publish the new object. 2268 OrderAccess::storestore(); 2269 SET_STACK_OBJECT(THREAD->vm_result(), -1); 2270 THREAD->set_vm_result(NULL); 2271 UPDATE_PC_AND_CONTINUE(3); 2272 } 2273 CASE(_multianewarray): { 2274 jint dims = *(pc+3); 2275 jint size = STACK_INT(-1); 2276 // stack grows down, dimensions are up! 2277 jint *dimarray = 2278 (jint*)&topOfStack[dims * Interpreter::stackElementWords+ 2279 Interpreter::stackElementWords-1]; 2280 //adjust pointer to start of stack element 2281 CALL_VM(InterpreterRuntime::multianewarray(THREAD, dimarray), 2282 handle_exception); 2283 // Must prevent reordering of stores for object initialization 2284 // with stores that publish the new object. 2285 OrderAccess::storestore(); 2286 SET_STACK_OBJECT(THREAD->vm_result(), -dims); 2287 THREAD->set_vm_result(NULL); 2288 UPDATE_PC_AND_TOS_AND_CONTINUE(4, -(dims-1)); 2289 } 2290 CASE(_checkcast): 2291 if (STACK_OBJECT(-1) != NULL) { 2292 VERIFY_OOP(STACK_OBJECT(-1)); 2293 u2 index = Bytes::get_Java_u2(pc+1); 2294 // Constant pool may have actual klass or unresolved klass. If it is 2295 // unresolved we must resolve it. 2296 if (METHOD->constants()->tag_at(index).is_unresolved_klass()) { 2297 CALL_VM(InterpreterRuntime::quicken_io_cc(THREAD), handle_exception); 2298 } 2299 Klass* klassOf = (Klass*) METHOD->constants()->slot_at(index).get_klass(); 2300 Klass* objKlass = STACK_OBJECT(-1)->klass(); // ebx 2301 // 2302 // Check for compatibilty. This check must not GC!! 2303 // Seems way more expensive now that we must dispatch. 2304 // 2305 if (objKlass != klassOf && !objKlass->is_subtype_of(klassOf)) { 2306 // Decrement counter at checkcast. 2307 BI_PROFILE_SUBTYPECHECK_FAILED(objKlass); 2308 ResourceMark rm(THREAD); 2309 const char* objName = objKlass->external_name(); 2310 const char* klassName = klassOf->external_name(); 2311 char* message = SharedRuntime::generate_class_cast_message( 2312 objName, klassName); 2313 VM_JAVA_ERROR(vmSymbols::java_lang_ClassCastException(), message, note_classCheck_trap); 2314 } 2315 // Profile checkcast with null_seen and receiver. 2316 BI_PROFILE_UPDATE_CHECKCAST(/*null_seen=*/false, objKlass); 2317 } else { 2318 // Profile checkcast with null_seen and receiver. 2319 BI_PROFILE_UPDATE_CHECKCAST(/*null_seen=*/true, NULL); 2320 } 2321 UPDATE_PC_AND_CONTINUE(3); 2322 2323 CASE(_instanceof): 2324 if (STACK_OBJECT(-1) == NULL) { 2325 SET_STACK_INT(0, -1); 2326 // Profile instanceof with null_seen and receiver. 2327 BI_PROFILE_UPDATE_INSTANCEOF(/*null_seen=*/true, NULL); 2328 } else { 2329 VERIFY_OOP(STACK_OBJECT(-1)); 2330 u2 index = Bytes::get_Java_u2(pc+1); 2331 // Constant pool may have actual klass or unresolved klass. If it is 2332 // unresolved we must resolve it. 2333 if (METHOD->constants()->tag_at(index).is_unresolved_klass()) { 2334 CALL_VM(InterpreterRuntime::quicken_io_cc(THREAD), handle_exception); 2335 } 2336 Klass* klassOf = (Klass*) METHOD->constants()->slot_at(index).get_klass(); 2337 Klass* objKlass = STACK_OBJECT(-1)->klass(); 2338 // 2339 // Check for compatibilty. This check must not GC!! 2340 // Seems way more expensive now that we must dispatch. 2341 // 2342 if ( objKlass == klassOf || objKlass->is_subtype_of(klassOf)) { 2343 SET_STACK_INT(1, -1); 2344 } else { 2345 SET_STACK_INT(0, -1); 2346 // Decrement counter at checkcast. 2347 BI_PROFILE_SUBTYPECHECK_FAILED(objKlass); 2348 } 2349 // Profile instanceof with null_seen and receiver. 2350 BI_PROFILE_UPDATE_INSTANCEOF(/*null_seen=*/false, objKlass); 2351 } 2352 UPDATE_PC_AND_CONTINUE(3); 2353 2354 CASE(_ldc_w): 2355 CASE(_ldc): 2356 { 2357 u2 index; 2358 bool wide = false; 2359 int incr = 2; // frequent case 2360 if (opcode == Bytecodes::_ldc) { 2361 index = pc[1]; 2362 } else { 2363 index = Bytes::get_Java_u2(pc+1); 2364 incr = 3; 2365 wide = true; 2366 } 2367 2368 ConstantPool* constants = METHOD->constants(); 2369 switch (constants->tag_at(index).value()) { 2370 case JVM_CONSTANT_Integer: 2371 SET_STACK_INT(constants->int_at(index), 0); 2372 break; 2373 2374 case JVM_CONSTANT_Float: 2375 SET_STACK_FLOAT(constants->float_at(index), 0); 2376 break; 2377 2378 case JVM_CONSTANT_String: 2379 { 2380 oop result = constants->resolved_references()->obj_at(index); 2381 if (result == NULL) { 2382 CALL_VM(InterpreterRuntime::resolve_ldc(THREAD, (Bytecodes::Code) opcode), handle_exception); 2383 SET_STACK_OBJECT(THREAD->vm_result(), 0); 2384 THREAD->set_vm_result(NULL); 2385 } else { 2386 VERIFY_OOP(result); 2387 SET_STACK_OBJECT(result, 0); 2388 } 2389 break; 2390 } 2391 2392 case JVM_CONSTANT_Class: 2393 VERIFY_OOP(constants->resolved_klass_at(index)->java_mirror()); 2394 SET_STACK_OBJECT(constants->resolved_klass_at(index)->java_mirror(), 0); 2395 break; 2396 2397 case JVM_CONSTANT_UnresolvedClass: 2398 case JVM_CONSTANT_UnresolvedClassInError: 2399 CALL_VM(InterpreterRuntime::ldc(THREAD, wide), handle_exception); 2400 SET_STACK_OBJECT(THREAD->vm_result(), 0); 2401 THREAD->set_vm_result(NULL); 2402 break; 2403 2404 default: ShouldNotReachHere(); 2405 } 2406 UPDATE_PC_AND_TOS_AND_CONTINUE(incr, 1); 2407 } 2408 2409 CASE(_ldc2_w): 2410 { 2411 u2 index = Bytes::get_Java_u2(pc+1); 2412 2413 ConstantPool* constants = METHOD->constants(); 2414 switch (constants->tag_at(index).value()) { 2415 2416 case JVM_CONSTANT_Long: 2417 SET_STACK_LONG(constants->long_at(index), 1); 2418 break; 2419 2420 case JVM_CONSTANT_Double: 2421 SET_STACK_DOUBLE(constants->double_at(index), 1); 2422 break; 2423 default: ShouldNotReachHere(); 2424 } 2425 UPDATE_PC_AND_TOS_AND_CONTINUE(3, 2); 2426 } 2427 2428 CASE(_fast_aldc_w): 2429 CASE(_fast_aldc): { 2430 u2 index; 2431 int incr; 2432 if (opcode == Bytecodes::_fast_aldc) { 2433 index = pc[1]; 2434 incr = 2; 2435 } else { 2436 index = Bytes::get_native_u2(pc+1); 2437 incr = 3; 2438 } 2439 2440 // We are resolved if the f1 field contains a non-null object (CallSite, etc.) 2441 // This kind of CP cache entry does not need to match the flags byte, because 2442 // there is a 1-1 relation between bytecode type and CP entry type. 2443 ConstantPool* constants = METHOD->constants(); 2444 oop result = constants->resolved_references()->obj_at(index); 2445 if (result == NULL) { 2446 CALL_VM(InterpreterRuntime::resolve_ldc(THREAD, (Bytecodes::Code) opcode), 2447 handle_exception); 2448 result = THREAD->vm_result(); 2449 } 2450 2451 VERIFY_OOP(result); 2452 SET_STACK_OBJECT(result, 0); 2453 UPDATE_PC_AND_TOS_AND_CONTINUE(incr, 1); 2454 } 2455 2456 CASE(_invokedynamic): { 2457 2458 if (!EnableInvokeDynamic) { 2459 // We should not encounter this bytecode if !EnableInvokeDynamic. 2460 // The verifier will stop it. However, if we get past the verifier, 2461 // this will stop the thread in a reasonable way, without crashing the JVM. 2462 CALL_VM(InterpreterRuntime::throw_IncompatibleClassChangeError(THREAD), 2463 handle_exception); 2464 ShouldNotReachHere(); 2465 } 2466 2467 u4 index = Bytes::get_native_u4(pc+1); 2468 ConstantPoolCacheEntry* cache = cp->constant_pool()->invokedynamic_cp_cache_entry_at(index); 2469 2470 // We are resolved if the resolved_references field contains a non-null object (CallSite, etc.) 2471 // This kind of CP cache entry does not need to match the flags byte, because 2472 // there is a 1-1 relation between bytecode type and CP entry type. 2473 if (! cache->is_resolved((Bytecodes::Code) opcode)) { 2474 CALL_VM(InterpreterRuntime::resolve_invokedynamic(THREAD), 2475 handle_exception); 2476 cache = cp->constant_pool()->invokedynamic_cp_cache_entry_at(index); 2477 } 2478 2479 Method* method = cache->f1_as_method(); 2480 if (VerifyOops) method->verify(); 2481 2482 if (cache->has_appendix()) { 2483 ConstantPool* constants = METHOD->constants(); 2484 SET_STACK_OBJECT(cache->appendix_if_resolved(constants), 0); 2485 MORE_STACK(1); 2486 } 2487 2488 istate->set_msg(call_method); 2489 istate->set_callee(method); 2490 istate->set_callee_entry_point(method->from_interpreted_entry()); 2491 istate->set_bcp_advance(5); 2492 2493 // Invokedynamic has got a call counter, just like an invokestatic -> increment! 2494 BI_PROFILE_UPDATE_CALL(); 2495 2496 UPDATE_PC_AND_RETURN(0); // I'll be back... 2497 } 2498 2499 CASE(_invokehandle): { 2500 2501 if (!EnableInvokeDynamic) { 2502 ShouldNotReachHere(); 2503 } 2504 2505 u2 index = Bytes::get_native_u2(pc+1); 2506 ConstantPoolCacheEntry* cache = cp->entry_at(index); 2507 2508 if (! cache->is_resolved((Bytecodes::Code) opcode)) { 2509 CALL_VM(InterpreterRuntime::resolve_invokehandle(THREAD), 2510 handle_exception); 2511 cache = cp->entry_at(index); 2512 } 2513 2514 Method* method = cache->f1_as_method(); 2515 if (VerifyOops) method->verify(); 2516 2517 if (cache->has_appendix()) { 2518 ConstantPool* constants = METHOD->constants(); 2519 SET_STACK_OBJECT(cache->appendix_if_resolved(constants), 0); 2520 MORE_STACK(1); 2521 } 2522 2523 istate->set_msg(call_method); 2524 istate->set_callee(method); 2525 istate->set_callee_entry_point(method->from_interpreted_entry()); 2526 istate->set_bcp_advance(3); 2527 2528 // Invokehandle has got a call counter, just like a final call -> increment! 2529 BI_PROFILE_UPDATE_FINALCALL(); 2530 2531 UPDATE_PC_AND_RETURN(0); // I'll be back... 2532 } 2533 2534 CASE(_invokeinterface): { 2535 u2 index = Bytes::get_native_u2(pc+1); 2536 2537 // QQQ Need to make this as inlined as possible. Probably need to split all the bytecode cases 2538 // out so c++ compiler has a chance for constant prop to fold everything possible away. 2539 2540 ConstantPoolCacheEntry* cache = cp->entry_at(index); 2541 if (!cache->is_resolved((Bytecodes::Code)opcode)) { 2542 CALL_VM(InterpreterRuntime::resolve_invoke(THREAD, (Bytecodes::Code)opcode), 2543 handle_exception); 2544 cache = cp->entry_at(index); 2545 } 2546 2547 istate->set_msg(call_method); 2548 2549 // Special case of invokeinterface called for virtual method of 2550 // java.lang.Object. See cpCacheOop.cpp for details. 2551 // This code isn't produced by javac, but could be produced by 2552 // another compliant java compiler. 2553 if (cache->is_forced_virtual()) { 2554 Method* callee; 2555 CHECK_NULL(STACK_OBJECT(-(cache->parameter_size()))); 2556 if (cache->is_vfinal()) { 2557 callee = cache->f2_as_vfinal_method(); 2558 // Profile 'special case of invokeinterface' final call. 2559 BI_PROFILE_UPDATE_FINALCALL(); 2560 } else { 2561 // Get receiver. 2562 int parms = cache->parameter_size(); 2563 // Same comments as invokevirtual apply here. 2564 oop rcvr = STACK_OBJECT(-parms); 2565 VERIFY_OOP(rcvr); 2566 InstanceKlass* rcvrKlass = (InstanceKlass*)rcvr->klass(); 2567 callee = (Method*) rcvrKlass->start_of_vtable()[ cache->f2_as_index()]; 2568 // Profile 'special case of invokeinterface' virtual call. 2569 BI_PROFILE_UPDATE_VIRTUALCALL(rcvr->klass()); 2570 } 2571 istate->set_callee(callee); 2572 istate->set_callee_entry_point(callee->from_interpreted_entry()); 2573 #ifdef VM_JVMTI 2574 if (JvmtiExport::can_post_interpreter_events() && THREAD->is_interp_only_mode()) { 2575 istate->set_callee_entry_point(callee->interpreter_entry()); 2576 } 2577 #endif /* VM_JVMTI */ 2578 istate->set_bcp_advance(5); 2579 UPDATE_PC_AND_RETURN(0); // I'll be back... 2580 } 2581 2582 // this could definitely be cleaned up QQQ 2583 Method* callee; 2584 Klass* iclass = cache->f1_as_klass(); 2585 // InstanceKlass* interface = (InstanceKlass*) iclass; 2586 // get receiver 2587 int parms = cache->parameter_size(); 2588 oop rcvr = STACK_OBJECT(-parms); 2589 CHECK_NULL(rcvr); 2590 InstanceKlass* int2 = (InstanceKlass*) rcvr->klass(); 2591 itableOffsetEntry* ki = (itableOffsetEntry*) int2->start_of_itable(); 2592 int i; 2593 for ( i = 0 ; i < int2->itable_length() ; i++, ki++ ) { 2594 if (ki->interface_klass() == iclass) break; 2595 } 2596 // If the interface isn't found, this class doesn't implement this 2597 // interface. The link resolver checks this but only for the first 2598 // time this interface is called. 2599 if (i == int2->itable_length()) { 2600 VM_JAVA_ERROR(vmSymbols::java_lang_IncompatibleClassChangeError(), "", note_no_trap); 2601 } 2602 int mindex = cache->f2_as_index(); 2603 itableMethodEntry* im = ki->first_method_entry(rcvr->klass()); 2604 callee = im[mindex].method(); 2605 if (callee == NULL) { 2606 VM_JAVA_ERROR(vmSymbols::java_lang_AbstractMethodError(), "", note_no_trap); 2607 } 2608 2609 // Profile virtual call. 2610 BI_PROFILE_UPDATE_VIRTUALCALL(rcvr->klass()); 2611 2612 istate->set_callee(callee); 2613 istate->set_callee_entry_point(callee->from_interpreted_entry()); 2614 #ifdef VM_JVMTI 2615 if (JvmtiExport::can_post_interpreter_events() && THREAD->is_interp_only_mode()) { 2616 istate->set_callee_entry_point(callee->interpreter_entry()); 2617 } 2618 #endif /* VM_JVMTI */ 2619 istate->set_bcp_advance(5); 2620 UPDATE_PC_AND_RETURN(0); // I'll be back... 2621 } 2622 2623 CASE(_invokevirtual): 2624 CASE(_invokespecial): 2625 CASE(_invokestatic): { 2626 u2 index = Bytes::get_native_u2(pc+1); 2627 2628 ConstantPoolCacheEntry* cache = cp->entry_at(index); 2629 // QQQ Need to make this as inlined as possible. Probably need to split all the bytecode cases 2630 // out so c++ compiler has a chance for constant prop to fold everything possible away. 2631 2632 if (!cache->is_resolved((Bytecodes::Code)opcode)) { 2633 CALL_VM(InterpreterRuntime::resolve_invoke(THREAD, (Bytecodes::Code)opcode), 2634 handle_exception); 2635 cache = cp->entry_at(index); 2636 } 2637 2638 istate->set_msg(call_method); 2639 { 2640 Method* callee; 2641 if ((Bytecodes::Code)opcode == Bytecodes::_invokevirtual) { 2642 CHECK_NULL(STACK_OBJECT(-(cache->parameter_size()))); 2643 if (cache->is_vfinal()) { 2644 callee = cache->f2_as_vfinal_method(); 2645 // Profile final call. 2646 BI_PROFILE_UPDATE_FINALCALL(); 2647 } else { 2648 // get receiver 2649 int parms = cache->parameter_size(); 2650 // this works but needs a resourcemark and seems to create a vtable on every call: 2651 // Method* callee = rcvr->klass()->vtable()->method_at(cache->f2_as_index()); 2652 // 2653 // this fails with an assert 2654 // InstanceKlass* rcvrKlass = InstanceKlass::cast(STACK_OBJECT(-parms)->klass()); 2655 // but this works 2656 oop rcvr = STACK_OBJECT(-parms); 2657 VERIFY_OOP(rcvr); 2658 InstanceKlass* rcvrKlass = (InstanceKlass*)rcvr->klass(); 2659 /* 2660 Executing this code in java.lang.String: 2661 public String(char value[]) { 2662 this.count = value.length; 2663 this.value = (char[])value.clone(); 2664 } 2665 2666 a find on rcvr->klass() reports: 2667 {type array char}{type array class} 2668 - klass: {other class} 2669 2670 but using InstanceKlass::cast(STACK_OBJECT(-parms)->klass()) causes in assertion failure 2671 because rcvr->klass()->oop_is_instance() == 0 2672 However it seems to have a vtable in the right location. Huh? 2673 2674 */ 2675 callee = (Method*) rcvrKlass->start_of_vtable()[ cache->f2_as_index()]; 2676 // Profile virtual call. 2677 BI_PROFILE_UPDATE_VIRTUALCALL(rcvr->klass()); 2678 } 2679 } else { 2680 if ((Bytecodes::Code)opcode == Bytecodes::_invokespecial) { 2681 CHECK_NULL(STACK_OBJECT(-(cache->parameter_size()))); 2682 } 2683 callee = cache->f1_as_method(); 2684 2685 // Profile call. 2686 BI_PROFILE_UPDATE_CALL(); 2687 } 2688 2689 istate->set_callee(callee); 2690 istate->set_callee_entry_point(callee->from_interpreted_entry()); 2691 #ifdef VM_JVMTI 2692 if (JvmtiExport::can_post_interpreter_events() && THREAD->is_interp_only_mode()) { 2693 istate->set_callee_entry_point(callee->interpreter_entry()); 2694 } 2695 #endif /* VM_JVMTI */ 2696 istate->set_bcp_advance(3); 2697 UPDATE_PC_AND_RETURN(0); // I'll be back... 2698 } 2699 } 2700 2701 /* Allocate memory for a new java object. */ 2702 2703 CASE(_newarray): { 2704 BasicType atype = (BasicType) *(pc+1); 2705 jint size = STACK_INT(-1); 2706 CALL_VM(InterpreterRuntime::newarray(THREAD, atype, size), 2707 handle_exception); 2708 // Must prevent reordering of stores for object initialization 2709 // with stores that publish the new object. 2710 OrderAccess::storestore(); 2711 SET_STACK_OBJECT(THREAD->vm_result(), -1); 2712 THREAD->set_vm_result(NULL); 2713 2714 UPDATE_PC_AND_CONTINUE(2); 2715 } 2716 2717 /* Throw an exception. */ 2718 2719 CASE(_athrow): { 2720 oop except_oop = STACK_OBJECT(-1); 2721 CHECK_NULL(except_oop); 2722 // set pending_exception so we use common code 2723 THREAD->set_pending_exception(except_oop, NULL, 0); 2724 goto handle_exception; 2725 } 2726 2727 /* goto and jsr. They are exactly the same except jsr pushes 2728 * the address of the next instruction first. 2729 */ 2730 2731 CASE(_jsr): { 2732 /* push bytecode index on stack */ 2733 SET_STACK_ADDR(((address)pc - (intptr_t)(istate->method()->code_base()) + 3), 0); 2734 MORE_STACK(1); 2735 /* FALL THROUGH */ 2736 } 2737 2738 CASE(_goto): 2739 { 2740 int16_t offset = (int16_t)Bytes::get_Java_u2(pc + 1); 2741 // Profile jump. 2742 BI_PROFILE_UPDATE_JUMP(); 2743 address branch_pc = pc; 2744 UPDATE_PC(offset); 2745 DO_BACKEDGE_CHECKS(offset, branch_pc); 2746 CONTINUE; 2747 } 2748 2749 CASE(_jsr_w): { 2750 /* push return address on the stack */ 2751 SET_STACK_ADDR(((address)pc - (intptr_t)(istate->method()->code_base()) + 5), 0); 2752 MORE_STACK(1); 2753 /* FALL THROUGH */ 2754 } 2755 2756 CASE(_goto_w): 2757 { 2758 int32_t offset = Bytes::get_Java_u4(pc + 1); 2759 // Profile jump. 2760 BI_PROFILE_UPDATE_JUMP(); 2761 address branch_pc = pc; 2762 UPDATE_PC(offset); 2763 DO_BACKEDGE_CHECKS(offset, branch_pc); 2764 CONTINUE; 2765 } 2766 2767 /* return from a jsr or jsr_w */ 2768 2769 CASE(_ret): { 2770 // Profile ret. 2771 BI_PROFILE_UPDATE_RET(/*bci=*/((int)(intptr_t)(LOCALS_ADDR(pc[1])))); 2772 // Now, update the pc. 2773 pc = istate->method()->code_base() + (intptr_t)(LOCALS_ADDR(pc[1])); 2774 UPDATE_PC_AND_CONTINUE(0); 2775 } 2776 2777 /* debugger breakpoint */ 2778 2779 CASE(_breakpoint): { 2780 Bytecodes::Code original_bytecode; 2781 DECACHE_STATE(); 2782 SET_LAST_JAVA_FRAME(); 2783 original_bytecode = InterpreterRuntime::get_original_bytecode_at(THREAD, 2784 METHOD, pc); 2785 RESET_LAST_JAVA_FRAME(); 2786 CACHE_STATE(); 2787 if (THREAD->has_pending_exception()) goto handle_exception; 2788 CALL_VM(InterpreterRuntime::_breakpoint(THREAD, METHOD, pc), 2789 handle_exception); 2790 2791 opcode = (jubyte)original_bytecode; 2792 goto opcode_switch; 2793 } 2794 2795 DEFAULT: 2796 fatal(err_msg("Unimplemented opcode %d = %s", opcode, 2797 Bytecodes::name((Bytecodes::Code)opcode))); 2798 goto finish; 2799 2800 } /* switch(opc) */ 2801 2802 2803 #ifdef USELABELS 2804 check_for_exception: 2805 #endif 2806 { 2807 if (!THREAD->has_pending_exception()) { 2808 CONTINUE; 2809 } 2810 /* We will be gcsafe soon, so flush our state. */ 2811 DECACHE_PC(); 2812 goto handle_exception; 2813 } 2814 do_continue: ; 2815 2816 } /* while (1) interpreter loop */ 2817 2818 2819 // An exception exists in the thread state see whether this activation can handle it 2820 handle_exception: { 2821 2822 HandleMarkCleaner __hmc(THREAD); 2823 Handle except_oop(THREAD, THREAD->pending_exception()); 2824 // Prevent any subsequent HandleMarkCleaner in the VM 2825 // from freeing the except_oop handle. 2826 HandleMark __hm(THREAD); 2827 2828 THREAD->clear_pending_exception(); 2829 assert(except_oop(), "No exception to process"); 2830 intptr_t continuation_bci; 2831 // expression stack is emptied 2832 topOfStack = istate->stack_base() - Interpreter::stackElementWords; 2833 CALL_VM(continuation_bci = (intptr_t)InterpreterRuntime::exception_handler_for_exception(THREAD, except_oop()), 2834 handle_exception); 2835 2836 except_oop = THREAD->vm_result(); 2837 THREAD->set_vm_result(NULL); 2838 if (continuation_bci >= 0) { 2839 // Place exception on top of stack 2840 SET_STACK_OBJECT(except_oop(), 0); 2841 MORE_STACK(1); 2842 pc = METHOD->code_base() + continuation_bci; 2843 if (TraceExceptions) { 2844 ttyLocker ttyl; 2845 ResourceMark rm; 2846 tty->print_cr("Exception <%s> (" INTPTR_FORMAT ")", except_oop->print_value_string(), (void*)except_oop()); 2847 tty->print_cr(" thrown in interpreter method <%s>", METHOD->print_value_string()); 2848 tty->print_cr(" at bci %d, continuing at %d for thread " INTPTR_FORMAT, 2849 istate->bcp() - (intptr_t)METHOD->code_base(), 2850 continuation_bci, THREAD); 2851 } 2852 // for AbortVMOnException flag 2853 NOT_PRODUCT(Exceptions::debug_check_abort(except_oop)); 2854 2855 // Update profiling data. 2856 BI_PROFILE_ALIGN_TO_CURRENT_BCI(); 2857 goto run; 2858 } 2859 if (TraceExceptions) { 2860 ttyLocker ttyl; 2861 ResourceMark rm; 2862 tty->print_cr("Exception <%s> (" INTPTR_FORMAT ")", except_oop->print_value_string(), (void*)except_oop()); 2863 tty->print_cr(" thrown in interpreter method <%s>", METHOD->print_value_string()); 2864 tty->print_cr(" at bci %d, unwinding for thread " INTPTR_FORMAT, 2865 istate->bcp() - (intptr_t)METHOD->code_base(), 2866 THREAD); 2867 } 2868 // for AbortVMOnException flag 2869 NOT_PRODUCT(Exceptions::debug_check_abort(except_oop)); 2870 // No handler in this activation, unwind and try again 2871 THREAD->set_pending_exception(except_oop(), NULL, 0); 2872 goto handle_return; 2873 } // handle_exception: 2874 2875 // Return from an interpreter invocation with the result of the interpretation 2876 // on the top of the Java Stack (or a pending exception) 2877 2878 handle_Pop_Frame: { 2879 2880 // We don't really do anything special here except we must be aware 2881 // that we can get here without ever locking the method (if sync). 2882 // Also we skip the notification of the exit. 2883 2884 istate->set_msg(popping_frame); 2885 // Clear pending so while the pop is in process 2886 // we don't start another one if a call_vm is done. 2887 THREAD->clr_pop_frame_pending(); 2888 // Let interpreter (only) see the we're in the process of popping a frame 2889 THREAD->set_pop_frame_in_process(); 2890 2891 goto handle_return; 2892 2893 } // handle_Pop_Frame 2894 2895 // ForceEarlyReturn ends a method, and returns to the caller with a return value 2896 // given by the invoker of the early return. 2897 handle_Early_Return: { 2898 2899 istate->set_msg(early_return); 2900 2901 // Clear expression stack. 2902 topOfStack = istate->stack_base() - Interpreter::stackElementWords; 2903 2904 JvmtiThreadState *ts = THREAD->jvmti_thread_state(); 2905 2906 // Push the value to be returned. 2907 switch (istate->method()->result_type()) { 2908 case T_BOOLEAN: 2909 case T_SHORT: 2910 case T_BYTE: 2911 case T_CHAR: 2912 case T_INT: 2913 SET_STACK_INT(ts->earlyret_value().i, 0); 2914 MORE_STACK(1); 2915 break; 2916 case T_LONG: 2917 SET_STACK_LONG(ts->earlyret_value().j, 1); 2918 MORE_STACK(2); 2919 break; 2920 case T_FLOAT: 2921 SET_STACK_FLOAT(ts->earlyret_value().f, 0); 2922 MORE_STACK(1); 2923 break; 2924 case T_DOUBLE: 2925 SET_STACK_DOUBLE(ts->earlyret_value().d, 1); 2926 MORE_STACK(2); 2927 break; 2928 case T_ARRAY: 2929 case T_OBJECT: 2930 SET_STACK_OBJECT(ts->earlyret_oop(), 0); 2931 MORE_STACK(1); 2932 break; 2933 } 2934 2935 ts->clr_earlyret_value(); 2936 ts->set_earlyret_oop(NULL); 2937 ts->clr_earlyret_pending(); 2938 2939 // Fall through to handle_return. 2940 2941 } // handle_Early_Return 2942 2943 handle_return: { 2944 // A storestore barrier is required to order initialization of 2945 // final fields with publishing the reference to the object that 2946 // holds the field. Without the barrier the value of final fields 2947 // can be observed to change. 2948 OrderAccess::storestore(); 2949 2950 DECACHE_STATE(); 2951 2952 bool suppress_error = istate->msg() == popping_frame || istate->msg() == early_return; 2953 bool suppress_exit_event = THREAD->has_pending_exception() || istate->msg() == popping_frame; 2954 Handle original_exception(THREAD, THREAD->pending_exception()); 2955 Handle illegal_state_oop(THREAD, NULL); 2956 2957 // We'd like a HandleMark here to prevent any subsequent HandleMarkCleaner 2958 // in any following VM entries from freeing our live handles, but illegal_state_oop 2959 // isn't really allocated yet and so doesn't become live until later and 2960 // in unpredicatable places. Instead we must protect the places where we enter the 2961 // VM. It would be much simpler (and safer) if we could allocate a real handle with 2962 // a NULL oop in it and then overwrite the oop later as needed. This isn't 2963 // unfortunately isn't possible. 2964 2965 THREAD->clear_pending_exception(); 2966 2967 // 2968 // As far as we are concerned we have returned. If we have a pending exception 2969 // that will be returned as this invocation's result. However if we get any 2970 // exception(s) while checking monitor state one of those IllegalMonitorStateExceptions 2971 // will be our final result (i.e. monitor exception trumps a pending exception). 2972 // 2973 2974 // If we never locked the method (or really passed the point where we would have), 2975 // there is no need to unlock it (or look for other monitors), since that 2976 // could not have happened. 2977 2978 if (THREAD->do_not_unlock()) { 2979 2980 // Never locked, reset the flag now because obviously any caller must 2981 // have passed their point of locking for us to have gotten here. 2982 2983 THREAD->clr_do_not_unlock(); 2984 } else { 2985 // At this point we consider that we have returned. We now check that the 2986 // locks were properly block structured. If we find that they were not 2987 // used properly we will return with an illegal monitor exception. 2988 // The exception is checked by the caller not the callee since this 2989 // checking is considered to be part of the invocation and therefore 2990 // in the callers scope (JVM spec 8.13). 2991 // 2992 // Another weird thing to watch for is if the method was locked 2993 // recursively and then not exited properly. This means we must 2994 // examine all the entries in reverse time(and stack) order and 2995 // unlock as we find them. If we find the method monitor before 2996 // we are at the initial entry then we should throw an exception. 2997 // It is not clear the template based interpreter does this 2998 // correctly 2999 3000 BasicObjectLock* base = istate->monitor_base(); 3001 BasicObjectLock* end = (BasicObjectLock*) istate->stack_base(); 3002 bool method_unlock_needed = METHOD->is_synchronized(); 3003 // We know the initial monitor was used for the method don't check that 3004 // slot in the loop 3005 if (method_unlock_needed) base--; 3006 3007 // Check all the monitors to see they are unlocked. Install exception if found to be locked. 3008 while (end < base) { 3009 oop lockee = end->obj(); 3010 if (lockee != NULL) { 3011 BasicLock* lock = end->lock(); 3012 markOop header = lock->displaced_header(); 3013 end->set_obj(NULL); 3014 3015 if (!lockee->mark()->has_bias_pattern()) { 3016 // If it isn't recursive we either must swap old header or call the runtime 3017 if (header != NULL) { 3018 if (Atomic::cmpxchg_ptr(header, lockee->mark_addr(), lock) != lock) { 3019 // restore object for the slow case 3020 end->set_obj(lockee); 3021 { 3022 // Prevent any HandleMarkCleaner from freeing our live handles 3023 HandleMark __hm(THREAD); 3024 CALL_VM_NOCHECK(InterpreterRuntime::monitorexit(THREAD, end)); 3025 } 3026 } 3027 } 3028 } 3029 // One error is plenty 3030 if (illegal_state_oop() == NULL && !suppress_error) { 3031 { 3032 // Prevent any HandleMarkCleaner from freeing our live handles 3033 HandleMark __hm(THREAD); 3034 CALL_VM_NOCHECK(InterpreterRuntime::throw_illegal_monitor_state_exception(THREAD)); 3035 } 3036 assert(THREAD->has_pending_exception(), "Lost our exception!"); 3037 illegal_state_oop = THREAD->pending_exception(); 3038 THREAD->clear_pending_exception(); 3039 } 3040 } 3041 end++; 3042 } 3043 // Unlock the method if needed 3044 if (method_unlock_needed) { 3045 if (base->obj() == NULL) { 3046 // The method is already unlocked this is not good. 3047 if (illegal_state_oop() == NULL && !suppress_error) { 3048 { 3049 // Prevent any HandleMarkCleaner from freeing our live handles 3050 HandleMark __hm(THREAD); 3051 CALL_VM_NOCHECK(InterpreterRuntime::throw_illegal_monitor_state_exception(THREAD)); 3052 } 3053 assert(THREAD->has_pending_exception(), "Lost our exception!"); 3054 illegal_state_oop = THREAD->pending_exception(); 3055 THREAD->clear_pending_exception(); 3056 } 3057 } else { 3058 // 3059 // The initial monitor is always used for the method 3060 // However if that slot is no longer the oop for the method it was unlocked 3061 // and reused by something that wasn't unlocked! 3062 // 3063 // deopt can come in with rcvr dead because c2 knows 3064 // its value is preserved in the monitor. So we can't use locals[0] at all 3065 // and must use first monitor slot. 3066 // 3067 oop rcvr = base->obj(); 3068 if (rcvr == NULL) { 3069 if (!suppress_error) { 3070 VM_JAVA_ERROR_NO_JUMP(vmSymbols::java_lang_NullPointerException(), "", note_nullCheck_trap); 3071 illegal_state_oop = THREAD->pending_exception(); 3072 THREAD->clear_pending_exception(); 3073 } 3074 } else if (UseHeavyMonitors) { 3075 { 3076 // Prevent any HandleMarkCleaner from freeing our live handles. 3077 HandleMark __hm(THREAD); 3078 CALL_VM_NOCHECK(InterpreterRuntime::monitorexit(THREAD, base)); 3079 } 3080 if (THREAD->has_pending_exception()) { 3081 if (!suppress_error) illegal_state_oop = THREAD->pending_exception(); 3082 THREAD->clear_pending_exception(); 3083 } 3084 } else { 3085 BasicLock* lock = base->lock(); 3086 markOop header = lock->displaced_header(); 3087 base->set_obj(NULL); 3088 3089 if (!rcvr->mark()->has_bias_pattern()) { 3090 base->set_obj(NULL); 3091 // If it isn't recursive we either must swap old header or call the runtime 3092 if (header != NULL) { 3093 if (Atomic::cmpxchg_ptr(header, rcvr->mark_addr(), lock) != lock) { 3094 // restore object for the slow case 3095 base->set_obj(rcvr); 3096 { 3097 // Prevent any HandleMarkCleaner from freeing our live handles 3098 HandleMark __hm(THREAD); 3099 CALL_VM_NOCHECK(InterpreterRuntime::monitorexit(THREAD, base)); 3100 } 3101 if (THREAD->has_pending_exception()) { 3102 if (!suppress_error) illegal_state_oop = THREAD->pending_exception(); 3103 THREAD->clear_pending_exception(); 3104 } 3105 } 3106 } 3107 } 3108 } 3109 } 3110 } 3111 } 3112 // Clear the do_not_unlock flag now. 3113 THREAD->clr_do_not_unlock(); 3114 3115 // 3116 // Notify jvmti/jvmdi 3117 // 3118 // NOTE: we do not notify a method_exit if we have a pending exception, 3119 // including an exception we generate for unlocking checks. In the former 3120 // case, JVMDI has already been notified by our call for the exception handler 3121 // and in both cases as far as JVMDI is concerned we have already returned. 3122 // If we notify it again JVMDI will be all confused about how many frames 3123 // are still on the stack (4340444). 3124 // 3125 // NOTE Further! It turns out the the JVMTI spec in fact expects to see 3126 // method_exit events whenever we leave an activation unless it was done 3127 // for popframe. This is nothing like jvmdi. However we are passing the 3128 // tests at the moment (apparently because they are jvmdi based) so rather 3129 // than change this code and possibly fail tests we will leave it alone 3130 // (with this note) in anticipation of changing the vm and the tests 3131 // simultaneously. 3132 3133 3134 // 3135 suppress_exit_event = suppress_exit_event || illegal_state_oop() != NULL; 3136 3137 3138 3139 #ifdef VM_JVMTI 3140 if (_jvmti_interp_events) { 3141 // Whenever JVMTI puts a thread in interp_only_mode, method 3142 // entry/exit events are sent for that thread to track stack depth. 3143 if ( !suppress_exit_event && THREAD->is_interp_only_mode() ) { 3144 { 3145 // Prevent any HandleMarkCleaner from freeing our live handles 3146 HandleMark __hm(THREAD); 3147 CALL_VM_NOCHECK(InterpreterRuntime::post_method_exit(THREAD)); 3148 } 3149 } 3150 } 3151 #endif /* VM_JVMTI */ 3152 3153 // 3154 // See if we are returning any exception 3155 // A pending exception that was pending prior to a possible popping frame 3156 // overrides the popping frame. 3157 // 3158 assert(!suppress_error || (suppress_error && illegal_state_oop() == NULL), "Error was not suppressed"); 3159 if (illegal_state_oop() != NULL || original_exception() != NULL) { 3160 // Inform the frame manager we have no result. 3161 istate->set_msg(throwing_exception); 3162 if (illegal_state_oop() != NULL) 3163 THREAD->set_pending_exception(illegal_state_oop(), NULL, 0); 3164 else 3165 THREAD->set_pending_exception(original_exception(), NULL, 0); 3166 UPDATE_PC_AND_RETURN(0); 3167 } 3168 3169 if (istate->msg() == popping_frame) { 3170 // Make it simpler on the assembly code and set the message for the frame pop. 3171 // returns 3172 if (istate->prev() == NULL) { 3173 // We must be returning to a deoptimized frame (because popframe only happens between 3174 // two interpreted frames). We need to save the current arguments in C heap so that 3175 // the deoptimized frame when it restarts can copy the arguments to its expression 3176 // stack and re-execute the call. We also have to notify deoptimization that this 3177 // has occurred and to pick the preserved args copy them to the deoptimized frame's 3178 // java expression stack. Yuck. 3179 // 3180 THREAD->popframe_preserve_args(in_ByteSize(METHOD->size_of_parameters() * wordSize), 3181 LOCALS_SLOT(METHOD->size_of_parameters() - 1)); 3182 THREAD->set_popframe_condition_bit(JavaThread::popframe_force_deopt_reexecution_bit); 3183 } 3184 } else { 3185 istate->set_msg(return_from_method); 3186 } 3187 3188 // Normal return 3189 // Advance the pc and return to frame manager 3190 UPDATE_PC_AND_RETURN(1); 3191 } /* handle_return: */ 3192 3193 // This is really a fatal error return 3194 3195 finish: 3196 DECACHE_TOS(); 3197 DECACHE_PC(); 3198 3199 return; 3200 } 3201 3202 /* 3203 * All the code following this point is only produced once and is not present 3204 * in the JVMTI version of the interpreter 3205 */ 3206 3207 #ifndef VM_JVMTI 3208 3209 // This constructor should only be used to contruct the object to signal 3210 // interpreter initialization. All other instances should be created by 3211 // the frame manager. 3212 BytecodeInterpreter::BytecodeInterpreter(messages msg) { 3213 if (msg != initialize) ShouldNotReachHere(); 3214 _msg = msg; 3215 _self_link = this; 3216 _prev_link = NULL; 3217 } 3218 3219 // Inline static functions for Java Stack and Local manipulation 3220 3221 // The implementations are platform dependent. We have to worry about alignment 3222 // issues on some machines which can change on the same platform depending on 3223 // whether it is an LP64 machine also. 3224 address BytecodeInterpreter::stack_slot(intptr_t *tos, int offset) { 3225 return (address) tos[Interpreter::expr_index_at(-offset)]; 3226 } 3227 3228 jint BytecodeInterpreter::stack_int(intptr_t *tos, int offset) { 3229 return *((jint*) &tos[Interpreter::expr_index_at(-offset)]); 3230 } 3231 3232 jfloat BytecodeInterpreter::stack_float(intptr_t *tos, int offset) { 3233 return *((jfloat *) &tos[Interpreter::expr_index_at(-offset)]); 3234 } 3235 3236 oop BytecodeInterpreter::stack_object(intptr_t *tos, int offset) { 3237 return cast_to_oop(tos [Interpreter::expr_index_at(-offset)]); 3238 } 3239 3240 jdouble BytecodeInterpreter::stack_double(intptr_t *tos, int offset) { 3241 return ((VMJavaVal64*) &tos[Interpreter::expr_index_at(-offset)])->d; 3242 } 3243 3244 jlong BytecodeInterpreter::stack_long(intptr_t *tos, int offset) { 3245 return ((VMJavaVal64 *) &tos[Interpreter::expr_index_at(-offset)])->l; 3246 } 3247 3248 // only used for value types 3249 void BytecodeInterpreter::set_stack_slot(intptr_t *tos, address value, 3250 int offset) { 3251 *((address *)&tos[Interpreter::expr_index_at(-offset)]) = value; 3252 } 3253 3254 void BytecodeInterpreter::set_stack_int(intptr_t *tos, int value, 3255 int offset) { 3256 *((jint *)&tos[Interpreter::expr_index_at(-offset)]) = value; 3257 } 3258 3259 void BytecodeInterpreter::set_stack_float(intptr_t *tos, jfloat value, 3260 int offset) { 3261 *((jfloat *)&tos[Interpreter::expr_index_at(-offset)]) = value; 3262 } 3263 3264 void BytecodeInterpreter::set_stack_object(intptr_t *tos, oop value, 3265 int offset) { 3266 *((oop *)&tos[Interpreter::expr_index_at(-offset)]) = value; 3267 } 3268 3269 // needs to be platform dep for the 32 bit platforms. 3270 void BytecodeInterpreter::set_stack_double(intptr_t *tos, jdouble value, 3271 int offset) { 3272 ((VMJavaVal64*)&tos[Interpreter::expr_index_at(-offset)])->d = value; 3273 } 3274 3275 void BytecodeInterpreter::set_stack_double_from_addr(intptr_t *tos, 3276 address addr, int offset) { 3277 (((VMJavaVal64*)&tos[Interpreter::expr_index_at(-offset)])->d = 3278 ((VMJavaVal64*)addr)->d); 3279 } 3280 3281 void BytecodeInterpreter::set_stack_long(intptr_t *tos, jlong value, 3282 int offset) { 3283 ((VMJavaVal64*)&tos[Interpreter::expr_index_at(-offset+1)])->l = 0xdeedbeeb; 3284 ((VMJavaVal64*)&tos[Interpreter::expr_index_at(-offset)])->l = value; 3285 } 3286 3287 void BytecodeInterpreter::set_stack_long_from_addr(intptr_t *tos, 3288 address addr, int offset) { 3289 ((VMJavaVal64*)&tos[Interpreter::expr_index_at(-offset+1)])->l = 0xdeedbeeb; 3290 ((VMJavaVal64*)&tos[Interpreter::expr_index_at(-offset)])->l = 3291 ((VMJavaVal64*)addr)->l; 3292 } 3293 3294 // Locals 3295 3296 address BytecodeInterpreter::locals_slot(intptr_t* locals, int offset) { 3297 return (address)locals[Interpreter::local_index_at(-offset)]; 3298 } 3299 jint BytecodeInterpreter::locals_int(intptr_t* locals, int offset) { 3300 return (jint)locals[Interpreter::local_index_at(-offset)]; 3301 } 3302 jfloat BytecodeInterpreter::locals_float(intptr_t* locals, int offset) { 3303 return (jfloat)locals[Interpreter::local_index_at(-offset)]; 3304 } 3305 oop BytecodeInterpreter::locals_object(intptr_t* locals, int offset) { 3306 return cast_to_oop(locals[Interpreter::local_index_at(-offset)]); 3307 } 3308 jdouble BytecodeInterpreter::locals_double(intptr_t* locals, int offset) { 3309 return ((VMJavaVal64*)&locals[Interpreter::local_index_at(-(offset+1))])->d; 3310 } 3311 jlong BytecodeInterpreter::locals_long(intptr_t* locals, int offset) { 3312 return ((VMJavaVal64*)&locals[Interpreter::local_index_at(-(offset+1))])->l; 3313 } 3314 3315 // Returns the address of locals value. 3316 address BytecodeInterpreter::locals_long_at(intptr_t* locals, int offset) { 3317 return ((address)&locals[Interpreter::local_index_at(-(offset+1))]); 3318 } 3319 address BytecodeInterpreter::locals_double_at(intptr_t* locals, int offset) { 3320 return ((address)&locals[Interpreter::local_index_at(-(offset+1))]); 3321 } 3322 3323 // Used for local value or returnAddress 3324 void BytecodeInterpreter::set_locals_slot(intptr_t *locals, 3325 address value, int offset) { 3326 *((address*)&locals[Interpreter::local_index_at(-offset)]) = value; 3327 } 3328 void BytecodeInterpreter::set_locals_int(intptr_t *locals, 3329 jint value, int offset) { 3330 *((jint *)&locals[Interpreter::local_index_at(-offset)]) = value; 3331 } 3332 void BytecodeInterpreter::set_locals_float(intptr_t *locals, 3333 jfloat value, int offset) { 3334 *((jfloat *)&locals[Interpreter::local_index_at(-offset)]) = value; 3335 } 3336 void BytecodeInterpreter::set_locals_object(intptr_t *locals, 3337 oop value, int offset) { 3338 *((oop *)&locals[Interpreter::local_index_at(-offset)]) = value; 3339 } 3340 void BytecodeInterpreter::set_locals_double(intptr_t *locals, 3341 jdouble value, int offset) { 3342 ((VMJavaVal64*)&locals[Interpreter::local_index_at(-(offset+1))])->d = value; 3343 } 3344 void BytecodeInterpreter::set_locals_long(intptr_t *locals, 3345 jlong value, int offset) { 3346 ((VMJavaVal64*)&locals[Interpreter::local_index_at(-(offset+1))])->l = value; 3347 } 3348 void BytecodeInterpreter::set_locals_double_from_addr(intptr_t *locals, 3349 address addr, int offset) { 3350 ((VMJavaVal64*)&locals[Interpreter::local_index_at(-(offset+1))])->d = ((VMJavaVal64*)addr)->d; 3351 } 3352 void BytecodeInterpreter::set_locals_long_from_addr(intptr_t *locals, 3353 address addr, int offset) { 3354 ((VMJavaVal64*)&locals[Interpreter::local_index_at(-(offset+1))])->l = ((VMJavaVal64*)addr)->l; 3355 } 3356 3357 void BytecodeInterpreter::astore(intptr_t* tos, int stack_offset, 3358 intptr_t* locals, int locals_offset) { 3359 intptr_t value = tos[Interpreter::expr_index_at(-stack_offset)]; 3360 locals[Interpreter::local_index_at(-locals_offset)] = value; 3361 } 3362 3363 3364 void BytecodeInterpreter::copy_stack_slot(intptr_t *tos, int from_offset, 3365 int to_offset) { 3366 tos[Interpreter::expr_index_at(-to_offset)] = 3367 (intptr_t)tos[Interpreter::expr_index_at(-from_offset)]; 3368 } 3369 3370 void BytecodeInterpreter::dup(intptr_t *tos) { 3371 copy_stack_slot(tos, -1, 0); 3372 } 3373 void BytecodeInterpreter::dup2(intptr_t *tos) { 3374 copy_stack_slot(tos, -2, 0); 3375 copy_stack_slot(tos, -1, 1); 3376 } 3377 3378 void BytecodeInterpreter::dup_x1(intptr_t *tos) { 3379 /* insert top word two down */ 3380 copy_stack_slot(tos, -1, 0); 3381 copy_stack_slot(tos, -2, -1); 3382 copy_stack_slot(tos, 0, -2); 3383 } 3384 3385 void BytecodeInterpreter::dup_x2(intptr_t *tos) { 3386 /* insert top word three down */ 3387 copy_stack_slot(tos, -1, 0); 3388 copy_stack_slot(tos, -2, -1); 3389 copy_stack_slot(tos, -3, -2); 3390 copy_stack_slot(tos, 0, -3); 3391 } 3392 void BytecodeInterpreter::dup2_x1(intptr_t *tos) { 3393 /* insert top 2 slots three down */ 3394 copy_stack_slot(tos, -1, 1); 3395 copy_stack_slot(tos, -2, 0); 3396 copy_stack_slot(tos, -3, -1); 3397 copy_stack_slot(tos, 1, -2); 3398 copy_stack_slot(tos, 0, -3); 3399 } 3400 void BytecodeInterpreter::dup2_x2(intptr_t *tos) { 3401 /* insert top 2 slots four down */ 3402 copy_stack_slot(tos, -1, 1); 3403 copy_stack_slot(tos, -2, 0); 3404 copy_stack_slot(tos, -3, -1); 3405 copy_stack_slot(tos, -4, -2); 3406 copy_stack_slot(tos, 1, -3); 3407 copy_stack_slot(tos, 0, -4); 3408 } 3409 3410 3411 void BytecodeInterpreter::swap(intptr_t *tos) { 3412 // swap top two elements 3413 intptr_t val = tos[Interpreter::expr_index_at(1)]; 3414 // Copy -2 entry to -1 3415 copy_stack_slot(tos, -2, -1); 3416 // Store saved -1 entry into -2 3417 tos[Interpreter::expr_index_at(2)] = val; 3418 } 3419 // -------------------------------------------------------------------------------- 3420 // Non-product code 3421 #ifndef PRODUCT 3422 3423 const char* BytecodeInterpreter::C_msg(BytecodeInterpreter::messages msg) { 3424 switch (msg) { 3425 case BytecodeInterpreter::no_request: return("no_request"); 3426 case BytecodeInterpreter::initialize: return("initialize"); 3427 // status message to C++ interpreter 3428 case BytecodeInterpreter::method_entry: return("method_entry"); 3429 case BytecodeInterpreter::method_resume: return("method_resume"); 3430 case BytecodeInterpreter::got_monitors: return("got_monitors"); 3431 case BytecodeInterpreter::rethrow_exception: return("rethrow_exception"); 3432 // requests to frame manager from C++ interpreter 3433 case BytecodeInterpreter::call_method: return("call_method"); 3434 case BytecodeInterpreter::return_from_method: return("return_from_method"); 3435 case BytecodeInterpreter::more_monitors: return("more_monitors"); 3436 case BytecodeInterpreter::throwing_exception: return("throwing_exception"); 3437 case BytecodeInterpreter::popping_frame: return("popping_frame"); 3438 case BytecodeInterpreter::do_osr: return("do_osr"); 3439 // deopt 3440 case BytecodeInterpreter::deopt_resume: return("deopt_resume"); 3441 case BytecodeInterpreter::deopt_resume2: return("deopt_resume2"); 3442 default: return("BAD MSG"); 3443 } 3444 } 3445 void 3446 BytecodeInterpreter::print() { 3447 tty->print_cr("thread: " INTPTR_FORMAT, (uintptr_t) this->_thread); 3448 tty->print_cr("bcp: " INTPTR_FORMAT, (uintptr_t) this->_bcp); 3449 tty->print_cr("locals: " INTPTR_FORMAT, (uintptr_t) this->_locals); 3450 tty->print_cr("constants: " INTPTR_FORMAT, (uintptr_t) this->_constants); 3451 { 3452 ResourceMark rm; 3453 char *method_name = _method->name_and_sig_as_C_string(); 3454 tty->print_cr("method: " INTPTR_FORMAT "[ %s ]", (uintptr_t) this->_method, method_name); 3455 } 3456 tty->print_cr("mdx: " INTPTR_FORMAT, (uintptr_t) this->_mdx); 3457 tty->print_cr("stack: " INTPTR_FORMAT, (uintptr_t) this->_stack); 3458 tty->print_cr("msg: %s", C_msg(this->_msg)); 3459 tty->print_cr("result_to_call._callee: " INTPTR_FORMAT, (uintptr_t) this->_result._to_call._callee); 3460 tty->print_cr("result_to_call._callee_entry_point: " INTPTR_FORMAT, (uintptr_t) this->_result._to_call._callee_entry_point); 3461 tty->print_cr("result_to_call._bcp_advance: %d ", this->_result._to_call._bcp_advance); 3462 tty->print_cr("osr._osr_buf: " INTPTR_FORMAT, (uintptr_t) this->_result._osr._osr_buf); 3463 tty->print_cr("osr._osr_entry: " INTPTR_FORMAT, (uintptr_t) this->_result._osr._osr_entry); 3464 tty->print_cr("prev_link: " INTPTR_FORMAT, (uintptr_t) this->_prev_link); 3465 tty->print_cr("native_mirror: " INTPTR_FORMAT, (void*) this->_oop_temp); 3466 tty->print_cr("stack_base: " INTPTR_FORMAT, (uintptr_t) this->_stack_base); 3467 tty->print_cr("stack_limit: " INTPTR_FORMAT, (uintptr_t) this->_stack_limit); 3468 tty->print_cr("monitor_base: " INTPTR_FORMAT, (uintptr_t) this->_monitor_base); 3469 #ifdef SPARC 3470 tty->print_cr("last_Java_pc: " INTPTR_FORMAT, (uintptr_t) this->_last_Java_pc); 3471 tty->print_cr("frame_bottom: " INTPTR_FORMAT, (uintptr_t) this->_frame_bottom); 3472 tty->print_cr("&native_fresult: " INTPTR_FORMAT, (uintptr_t) &this->_native_fresult); 3473 tty->print_cr("native_lresult: " INTPTR_FORMAT, (uintptr_t) this->_native_lresult); 3474 #endif 3475 #if !defined(ZERO) 3476 tty->print_cr("last_Java_fp: " INTPTR_FORMAT, (uintptr_t) this->_last_Java_fp); 3477 #endif // !ZERO 3478 tty->print_cr("self_link: " INTPTR_FORMAT, (uintptr_t) this->_self_link); 3479 } 3480 3481 extern "C" { 3482 void PI(uintptr_t arg) { 3483 ((BytecodeInterpreter*)arg)->print(); 3484 } 3485 } 3486 #endif // PRODUCT 3487 3488 #endif // JVMTI 3489 #endif // CC_INTERP