1 /*
2 * Copyright (c) 2002, 2016, 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/orderAccess.inline.hpp"
45 #include "runtime/sharedRuntime.hpp"
46 #include "runtime/threadCritical.hpp"
47 #include "utilities/exceptions.hpp"
48
49 // no precompiled headers
50 #ifdef CC_INTERP
51
52 /*
53 * USELABELS - If using GCC, then use labels for the opcode dispatching
54 * rather -then a switch statement. This improves performance because it
55 * gives us the oportunity to have the instructions that calculate the
56 * next opcode to jump to be intermixed with the rest of the instructions
57 * that implement the opcode (see UPDATE_PC_AND_TOS_AND_CONTINUE macro).
58 */
59 #undef USELABELS
60 #ifdef __GNUC__
61 /*
62 ASSERT signifies debugging. It is much easier to step thru bytecodes if we
63 don't use the computed goto approach.
64 */
65 #ifndef ASSERT
66 #define USELABELS
67 #endif
68 #endif
69
70 #undef CASE
71 #ifdef USELABELS
72 #define CASE(opcode) opc ## opcode
73 #define DEFAULT opc_default
74 #else
75 #define CASE(opcode) case Bytecodes:: opcode
76 #define DEFAULT default
77 #endif
78
79 /*
80 * PREFETCH_OPCCODE - Some compilers do better if you prefetch the next
81 * opcode before going back to the top of the while loop, rather then having
82 * the top of the while loop handle it. This provides a better opportunity
83 * for instruction scheduling. Some compilers just do this prefetch
84 * automatically. Some actually end up with worse performance if you
85 * force the prefetch. Solaris gcc seems to do better, but cc does worse.
86 */
87 #undef PREFETCH_OPCCODE
88 #define PREFETCH_OPCCODE
89
90 /*
91 Interpreter safepoint: it is expected that the interpreter will have no live
92 handles of its own creation live at an interpreter safepoint. Therefore we
93 run a HandleMarkCleaner and trash all handles allocated in the call chain
94 since the JavaCalls::call_helper invocation that initiated the chain.
95 There really shouldn't be any handles remaining to trash but this is cheap
96 in relation to a safepoint.
97 */
98 #define SAFEPOINT \
99 if ( SafepointSynchronize::is_synchronizing()) { \
100 { \
101 /* zap freed handles rather than GC'ing them */ \
102 HandleMarkCleaner __hmc(THREAD); \
103 } \
104 CALL_VM(SafepointSynchronize::block(THREAD), handle_exception); \
105 }
106
107 /*
108 * VM_JAVA_ERROR - Macro for throwing a java exception from
109 * the interpreter loop. Should really be a CALL_VM but there
110 * is no entry point to do the transition to vm so we just
111 * do it by hand here.
112 */
113 #define VM_JAVA_ERROR_NO_JUMP(name, msg, note_a_trap) \
114 DECACHE_STATE(); \
115 SET_LAST_JAVA_FRAME(); \
116 { \
117 InterpreterRuntime::note_a_trap(THREAD, istate->method(), BCI()); \
118 ThreadInVMfromJava trans(THREAD); \
119 Exceptions::_throw_msg(THREAD, __FILE__, __LINE__, name, msg); \
120 } \
121 RESET_LAST_JAVA_FRAME(); \
122 CACHE_STATE();
123
124 // Normal throw of a java error.
125 #define VM_JAVA_ERROR(name, msg, note_a_trap) \
126 VM_JAVA_ERROR_NO_JUMP(name, msg, note_a_trap) \
127 goto handle_exception;
128
129 #ifdef PRODUCT
130 #define DO_UPDATE_INSTRUCTION_COUNT(opcode)
131 #else
132 #define DO_UPDATE_INSTRUCTION_COUNT(opcode) \
133 { \
134 BytecodeCounter::_counter_value++; \
135 BytecodeHistogram::_counters[(Bytecodes::Code)opcode]++; \
136 if (StopInterpreterAt && StopInterpreterAt == BytecodeCounter::_counter_value) os::breakpoint(); \
137 if (TraceBytecodes) { \
138 CALL_VM((void)SharedRuntime::trace_bytecode(THREAD, 0, \
139 topOfStack[Interpreter::expr_index_at(1)], \
140 topOfStack[Interpreter::expr_index_at(2)]), \
141 handle_exception); \
142 } \
143 }
144 #endif
145
146 #undef DEBUGGER_SINGLE_STEP_NOTIFY
147 #ifdef VM_JVMTI
148 /* NOTE: (kbr) This macro must be called AFTER the PC has been
149 incremented. JvmtiExport::at_single_stepping_point() may cause a
150 breakpoint opcode to get inserted at the current PC to allow the
151 debugger to coalesce single-step events.
152
153 As a result if we call at_single_stepping_point() we refetch opcode
154 to get the current opcode. This will override any other prefetching
155 that might have occurred.
156 */
157 #define DEBUGGER_SINGLE_STEP_NOTIFY() \
158 { \
159 if (_jvmti_interp_events) { \
160 if (JvmtiExport::should_post_single_step()) { \
161 DECACHE_STATE(); \
162 SET_LAST_JAVA_FRAME(); \
163 ThreadInVMfromJava trans(THREAD); \
164 JvmtiExport::at_single_stepping_point(THREAD, \
165 istate->method(), \
166 pc); \
167 RESET_LAST_JAVA_FRAME(); \
168 CACHE_STATE(); \
169 if (THREAD->pop_frame_pending() && \
170 !THREAD->pop_frame_in_process()) { \
171 goto handle_Pop_Frame; \
172 } \
173 if (THREAD->jvmti_thread_state() && \
174 THREAD->jvmti_thread_state()->is_earlyret_pending()) { \
175 goto handle_Early_Return; \
176 } \
177 opcode = *pc; \
178 } \
179 } \
180 }
181 #else
182 #define DEBUGGER_SINGLE_STEP_NOTIFY()
183 #endif
184
185 /*
186 * CONTINUE - Macro for executing the next opcode.
187 */
188 #undef CONTINUE
189 #ifdef USELABELS
190 // Have to do this dispatch this way in C++ because otherwise gcc complains about crossing an
191 // initialization (which is is the initialization of the table pointer...)
192 #define DISPATCH(opcode) goto *(void*)dispatch_table[opcode]
193 #define CONTINUE { \
194 opcode = *pc; \
195 DO_UPDATE_INSTRUCTION_COUNT(opcode); \
196 DEBUGGER_SINGLE_STEP_NOTIFY(); \
197 DISPATCH(opcode); \
198 }
199 #else
200 #ifdef PREFETCH_OPCCODE
201 #define CONTINUE { \
202 opcode = *pc; \
203 DO_UPDATE_INSTRUCTION_COUNT(opcode); \
204 DEBUGGER_SINGLE_STEP_NOTIFY(); \
205 continue; \
206 }
207 #else
208 #define CONTINUE { \
209 DO_UPDATE_INSTRUCTION_COUNT(opcode); \
210 DEBUGGER_SINGLE_STEP_NOTIFY(); \
211 continue; \
212 }
213 #endif
214 #endif
215
216
217 #define UPDATE_PC(opsize) {pc += opsize; }
218 /*
219 * UPDATE_PC_AND_TOS - Macro for updating the pc and topOfStack.
220 */
221 #undef UPDATE_PC_AND_TOS
222 #define UPDATE_PC_AND_TOS(opsize, stack) \
223 {pc += opsize; MORE_STACK(stack); }
224
225 /*
226 * UPDATE_PC_AND_TOS_AND_CONTINUE - Macro for updating the pc and topOfStack,
227 * and executing the next opcode. It's somewhat similar to the combination
228 * of UPDATE_PC_AND_TOS and CONTINUE, but with some minor optimizations.
229 */
230 #undef UPDATE_PC_AND_TOS_AND_CONTINUE
231 #ifdef USELABELS
232 #define UPDATE_PC_AND_TOS_AND_CONTINUE(opsize, stack) { \
233 pc += opsize; opcode = *pc; MORE_STACK(stack); \
234 DO_UPDATE_INSTRUCTION_COUNT(opcode); \
235 DEBUGGER_SINGLE_STEP_NOTIFY(); \
236 DISPATCH(opcode); \
237 }
238
239 #define UPDATE_PC_AND_CONTINUE(opsize) { \
240 pc += opsize; opcode = *pc; \
241 DO_UPDATE_INSTRUCTION_COUNT(opcode); \
242 DEBUGGER_SINGLE_STEP_NOTIFY(); \
243 DISPATCH(opcode); \
244 }
245 #else
246 #ifdef PREFETCH_OPCCODE
247 #define UPDATE_PC_AND_TOS_AND_CONTINUE(opsize, stack) { \
248 pc += opsize; opcode = *pc; MORE_STACK(stack); \
249 DO_UPDATE_INSTRUCTION_COUNT(opcode); \
250 DEBUGGER_SINGLE_STEP_NOTIFY(); \
251 goto do_continue; \
252 }
253
254 #define UPDATE_PC_AND_CONTINUE(opsize) { \
255 pc += opsize; opcode = *pc; \
256 DO_UPDATE_INSTRUCTION_COUNT(opcode); \
257 DEBUGGER_SINGLE_STEP_NOTIFY(); \
258 goto do_continue; \
259 }
260 #else
261 #define UPDATE_PC_AND_TOS_AND_CONTINUE(opsize, stack) { \
262 pc += opsize; MORE_STACK(stack); \
263 DO_UPDATE_INSTRUCTION_COUNT(opcode); \
264 DEBUGGER_SINGLE_STEP_NOTIFY(); \
265 goto do_continue; \
266 }
267
268 #define UPDATE_PC_AND_CONTINUE(opsize) { \
269 pc += opsize; \
270 DO_UPDATE_INSTRUCTION_COUNT(opcode); \
271 DEBUGGER_SINGLE_STEP_NOTIFY(); \
272 goto do_continue; \
273 }
274 #endif /* PREFETCH_OPCCODE */
275 #endif /* USELABELS */
276
277 // About to call a new method, update the save the adjusted pc and return to frame manager
278 #define UPDATE_PC_AND_RETURN(opsize) \
279 DECACHE_TOS(); \
280 istate->set_bcp(pc+opsize); \
281 return;
282
283
284 #define METHOD istate->method()
285 #define GET_METHOD_COUNTERS(res) \
286 res = METHOD->method_counters(); \
287 if (res == NULL) { \
288 CALL_VM(res = InterpreterRuntime::build_method_counters(THREAD, METHOD), handle_exception); \
289 }
290
291 #define OSR_REQUEST(res, branch_pc) \
292 CALL_VM(res=InterpreterRuntime::frequency_counter_overflow(THREAD, branch_pc), handle_exception);
293 /*
294 * For those opcodes that need to have a GC point on a backwards branch
295 */
296
297 // Backedge counting is kind of strange. The asm interpreter will increment
298 // the backedge counter as a separate counter but it does it's comparisons
299 // to the sum (scaled) of invocation counter and backedge count to make
300 // a decision. Seems kind of odd to sum them together like that
301
302 // skip is delta from current bcp/bci for target, branch_pc is pre-branch bcp
303
304
305 #define DO_BACKEDGE_CHECKS(skip, branch_pc) \
306 if ((skip) <= 0) { \
307 MethodCounters* mcs; \
308 GET_METHOD_COUNTERS(mcs); \
309 if (UseLoopCounter) { \
310 bool do_OSR = UseOnStackReplacement; \
311 mcs->backedge_counter()->increment(); \
312 if (ProfileInterpreter) { \
313 BI_PROFILE_GET_OR_CREATE_METHOD_DATA(handle_exception); \
314 /* Check for overflow against MDO count. */ \
315 do_OSR = do_OSR \
316 && (mdo_last_branch_taken_count >= (uint)InvocationCounter::InterpreterBackwardBranchLimit)\
317 /* When ProfileInterpreter is on, the backedge_count comes */ \
318 /* from the methodDataOop, which value does not get reset on */ \
319 /* the call to frequency_counter_overflow(). To avoid */ \
320 /* excessive calls to the overflow routine while the method is */ \
321 /* being compiled, add a second test to make sure the overflow */ \
322 /* function is called only once every overflow_frequency. */ \
323 && (!(mdo_last_branch_taken_count & 1023)); \
324 } else { \
325 /* check for overflow of backedge counter */ \
326 do_OSR = do_OSR \
327 && mcs->invocation_counter()->reached_InvocationLimit(mcs->backedge_counter()); \
328 } \
329 if (do_OSR) { \
330 nmethod* osr_nmethod; \
331 OSR_REQUEST(osr_nmethod, branch_pc); \
332 if (osr_nmethod != NULL && osr_nmethod->osr_entry_bci() != InvalidOSREntryBci) { \
333 intptr_t* buf; \
334 /* Call OSR migration with last java frame only, no checks. */ \
335 CALL_VM_NAKED_LJF(buf=SharedRuntime::OSR_migration_begin(THREAD)); \
336 istate->set_msg(do_osr); \
337 istate->set_osr_buf((address)buf); \
338 istate->set_osr_entry(osr_nmethod->osr_entry()); \
339 return; \
340 } \
341 } \
342 } /* UseCompiler ... */ \
343 SAFEPOINT; \
344 }
345
346 /*
347 * For those opcodes that need to have a GC point on a backwards branch
348 */
349
350 /*
351 * Macros for caching and flushing the interpreter state. Some local
352 * variables need to be flushed out to the frame before we do certain
353 * things (like pushing frames or becomming gc safe) and some need to
354 * be recached later (like after popping a frame). We could use one
355 * macro to cache or decache everything, but this would be less then
356 * optimal because we don't always need to cache or decache everything
357 * because some things we know are already cached or decached.
358 */
359 #undef DECACHE_TOS
360 #undef CACHE_TOS
361 #undef CACHE_PREV_TOS
362 #define DECACHE_TOS() istate->set_stack(topOfStack);
363
364 #define CACHE_TOS() topOfStack = (intptr_t *)istate->stack();
365
366 #undef DECACHE_PC
367 #undef CACHE_PC
368 #define DECACHE_PC() istate->set_bcp(pc);
369 #define CACHE_PC() pc = istate->bcp();
370 #define CACHE_CP() cp = istate->constants();
371 #define CACHE_LOCALS() locals = istate->locals();
372 #undef CACHE_FRAME
373 #define CACHE_FRAME()
374
375 // BCI() returns the current bytecode-index.
376 #undef BCI
377 #define BCI() ((int)(intptr_t)(pc - (intptr_t)istate->method()->code_base()))
378
379 /*
380 * CHECK_NULL - Macro for throwing a NullPointerException if the object
381 * passed is a null ref.
382 * On some architectures/platforms it should be possible to do this implicitly
383 */
384 #undef CHECK_NULL
385 #define CHECK_NULL(obj_) \
386 if ((obj_) == NULL) { \
387 VM_JAVA_ERROR(vmSymbols::java_lang_NullPointerException(), NULL, note_nullCheck_trap); \
388 } \
389 VERIFY_OOP(obj_)
390
391 #define VMdoubleConstZero() 0.0
392 #define VMdoubleConstOne() 1.0
393 #define VMlongConstZero() (max_jlong-max_jlong)
394 #define VMlongConstOne() ((max_jlong-max_jlong)+1)
395
396 /*
397 * Alignment
398 */
399 #define VMalignWordUp(val) (((uintptr_t)(val) + 3) & ~3)
400
401 // Decache the interpreter state that interpreter modifies directly (i.e. GC is indirect mod)
402 #define DECACHE_STATE() DECACHE_PC(); DECACHE_TOS();
403
404 // Reload interpreter state after calling the VM or a possible GC
405 #define CACHE_STATE() \
406 CACHE_TOS(); \
407 CACHE_PC(); \
408 CACHE_CP(); \
409 CACHE_LOCALS();
410
411 // Call the VM with last java frame only.
412 #define CALL_VM_NAKED_LJF(func) \
413 DECACHE_STATE(); \
414 SET_LAST_JAVA_FRAME(); \
415 func; \
416 RESET_LAST_JAVA_FRAME(); \
417 CACHE_STATE();
418
419 // Call the VM. Don't check for pending exceptions.
420 #define CALL_VM_NOCHECK(func) \
421 CALL_VM_NAKED_LJF(func) \
422 if (THREAD->pop_frame_pending() && \
423 !THREAD->pop_frame_in_process()) { \
424 goto handle_Pop_Frame; \
425 } \
426 if (THREAD->jvmti_thread_state() && \
427 THREAD->jvmti_thread_state()->is_earlyret_pending()) { \
428 goto handle_Early_Return; \
429 }
430
431 // Call the VM and check for pending exceptions
432 #define CALL_VM(func, label) { \
433 CALL_VM_NOCHECK(func); \
434 if (THREAD->has_pending_exception()) goto label; \
435 }
436
437 /*
438 * BytecodeInterpreter::run(interpreterState istate)
439 * BytecodeInterpreter::runWithChecks(interpreterState istate)
440 *
441 * The real deal. This is where byte codes actually get interpreted.
442 * Basically it's a big while loop that iterates until we return from
443 * the method passed in.
444 *
445 * The runWithChecks is used if JVMTI is enabled.
446 *
447 */
448 #if defined(VM_JVMTI)
449 void
450 BytecodeInterpreter::runWithChecks(interpreterState istate) {
451 #else
452 void
453 BytecodeInterpreter::run(interpreterState istate) {
454 #endif
455
456 // In order to simplify some tests based on switches set at runtime
457 // we invoke the interpreter a single time after switches are enabled
458 // and set simpler to to test variables rather than method calls or complex
459 // boolean expressions.
460
461 static int initialized = 0;
462 static int checkit = 0;
463 static intptr_t* c_addr = NULL;
464 static intptr_t c_value;
465
466 if (checkit && *c_addr != c_value) {
467 os::breakpoint();
468 }
469 #ifdef VM_JVMTI
470 static bool _jvmti_interp_events = 0;
471 #endif
472
473 static int _compiling; // (UseCompiler || CountCompiledCalls)
474
475 #ifdef ASSERT
476 if (istate->_msg != initialize) {
477 // We have a problem here if we are running with a pre-hsx24 JDK (for example during bootstrap)
478 // because in that case, EnableInvokeDynamic is true by default but will be later switched off
479 // if java_lang_invoke_MethodHandle::compute_offsets() detects that the JDK only has the classes
480 // for the old JSR292 implementation.
481 // This leads to a situation where 'istate->_stack_limit' always accounts for
482 // methodOopDesc::extra_stack_entries() because it is computed in
483 // CppInterpreterGenerator::generate_compute_interpreter_state() which was generated while
484 // EnableInvokeDynamic was still true. On the other hand, istate->_method->max_stack() doesn't
485 // account for extra_stack_entries() anymore because at the time when it is called
486 // EnableInvokeDynamic was already set to false.
487 // So we have a second version of the assertion which handles the case where EnableInvokeDynamic was
488 // switched off because of the wrong classes.
489 if (EnableInvokeDynamic || FLAG_IS_CMDLINE(EnableInvokeDynamic)) {
490 assert(labs(istate->_stack_base - istate->_stack_limit) == (istate->_method->max_stack() + 1), "bad stack limit");
491 } else {
492 const int extra_stack_entries = Method::extra_stack_entries_for_jsr292;
493 assert(labs(istate->_stack_base - istate->_stack_limit) == (istate->_method->max_stack() + extra_stack_entries
494 + 1), "bad stack limit");
495 }
496 #ifndef SHARK
497 IA32_ONLY(assert(istate->_stack_limit == istate->_thread->last_Java_sp() + 1, "wrong"));
498 #endif // !SHARK
499 }
500 // Verify linkages.
501 interpreterState l = istate;
502 do {
503 assert(l == l->_self_link, "bad link");
504 l = l->_prev_link;
505 } while (l != NULL);
506 // Screwups with stack management usually cause us to overwrite istate
507 // save a copy so we can verify it.
508 interpreterState orig = istate;
509 #endif
510
511 register intptr_t* topOfStack = (intptr_t *)istate->stack(); /* access with STACK macros */
512 register address pc = istate->bcp();
513 register jubyte opcode;
514 register intptr_t* locals = istate->locals();
515 register ConstantPoolCache* cp = istate->constants(); // method()->constants()->cache()
516 #ifdef LOTS_OF_REGS
517 register JavaThread* THREAD = istate->thread();
518 #else
519 #undef THREAD
520 #define THREAD istate->thread()
521 #endif
522
523 #ifdef USELABELS
524 const static void* const opclabels_data[256] = {
525 /* 0x00 */ &&opc_nop, &&opc_aconst_null,&&opc_iconst_m1,&&opc_iconst_0,
526 /* 0x04 */ &&opc_iconst_1,&&opc_iconst_2, &&opc_iconst_3, &&opc_iconst_4,
527 /* 0x08 */ &&opc_iconst_5,&&opc_lconst_0, &&opc_lconst_1, &&opc_fconst_0,
528 /* 0x0C */ &&opc_fconst_1,&&opc_fconst_2, &&opc_dconst_0, &&opc_dconst_1,
529
530 /* 0x10 */ &&opc_bipush, &&opc_sipush, &&opc_ldc, &&opc_ldc_w,
531 /* 0x14 */ &&opc_ldc2_w, &&opc_iload, &&opc_lload, &&opc_fload,
532 /* 0x18 */ &&opc_dload, &&opc_aload, &&opc_iload_0,&&opc_iload_1,
533 /* 0x1C */ &&opc_iload_2,&&opc_iload_3,&&opc_lload_0,&&opc_lload_1,
534
535 /* 0x20 */ &&opc_lload_2,&&opc_lload_3,&&opc_fload_0,&&opc_fload_1,
536 /* 0x24 */ &&opc_fload_2,&&opc_fload_3,&&opc_dload_0,&&opc_dload_1,
537 /* 0x28 */ &&opc_dload_2,&&opc_dload_3,&&opc_aload_0,&&opc_aload_1,
538 /* 0x2C */ &&opc_aload_2,&&opc_aload_3,&&opc_iaload, &&opc_laload,
539
540 /* 0x30 */ &&opc_faload, &&opc_daload, &&opc_aaload, &&opc_baload,
541 /* 0x34 */ &&opc_caload, &&opc_saload, &&opc_istore, &&opc_lstore,
542 /* 0x38 */ &&opc_fstore, &&opc_dstore, &&opc_astore, &&opc_istore_0,
543 /* 0x3C */ &&opc_istore_1,&&opc_istore_2,&&opc_istore_3,&&opc_lstore_0,
544
545 /* 0x40 */ &&opc_lstore_1,&&opc_lstore_2,&&opc_lstore_3,&&opc_fstore_0,
546 /* 0x44 */ &&opc_fstore_1,&&opc_fstore_2,&&opc_fstore_3,&&opc_dstore_0,
547 /* 0x48 */ &&opc_dstore_1,&&opc_dstore_2,&&opc_dstore_3,&&opc_astore_0,
548 /* 0x4C */ &&opc_astore_1,&&opc_astore_2,&&opc_astore_3,&&opc_iastore,
549
550 /* 0x50 */ &&opc_lastore,&&opc_fastore,&&opc_dastore,&&opc_aastore,
551 /* 0x54 */ &&opc_bastore,&&opc_castore,&&opc_sastore,&&opc_pop,
552 /* 0x58 */ &&opc_pop2, &&opc_dup, &&opc_dup_x1, &&opc_dup_x2,
553 /* 0x5C */ &&opc_dup2, &&opc_dup2_x1,&&opc_dup2_x2,&&opc_swap,
554
555 /* 0x60 */ &&opc_iadd,&&opc_ladd,&&opc_fadd,&&opc_dadd,
556 /* 0x64 */ &&opc_isub,&&opc_lsub,&&opc_fsub,&&opc_dsub,
557 /* 0x68 */ &&opc_imul,&&opc_lmul,&&opc_fmul,&&opc_dmul,
558 /* 0x6C */ &&opc_idiv,&&opc_ldiv,&&opc_fdiv,&&opc_ddiv,
559
560 /* 0x70 */ &&opc_irem, &&opc_lrem, &&opc_frem,&&opc_drem,
561 /* 0x74 */ &&opc_ineg, &&opc_lneg, &&opc_fneg,&&opc_dneg,
562 /* 0x78 */ &&opc_ishl, &&opc_lshl, &&opc_ishr,&&opc_lshr,
563 /* 0x7C */ &&opc_iushr,&&opc_lushr,&&opc_iand,&&opc_land,
564
565 /* 0x80 */ &&opc_ior, &&opc_lor,&&opc_ixor,&&opc_lxor,
566 /* 0x84 */ &&opc_iinc,&&opc_i2l,&&opc_i2f, &&opc_i2d,
567 /* 0x88 */ &&opc_l2i, &&opc_l2f,&&opc_l2d, &&opc_f2i,
568 /* 0x8C */ &&opc_f2l, &&opc_f2d,&&opc_d2i, &&opc_d2l,
569
570 /* 0x90 */ &&opc_d2f, &&opc_i2b, &&opc_i2c, &&opc_i2s,
571 /* 0x94 */ &&opc_lcmp, &&opc_fcmpl,&&opc_fcmpg,&&opc_dcmpl,
572 /* 0x98 */ &&opc_dcmpg,&&opc_ifeq, &&opc_ifne, &&opc_iflt,
573 /* 0x9C */ &&opc_ifge, &&opc_ifgt, &&opc_ifle, &&opc_if_icmpeq,
574
575 /* 0xA0 */ &&opc_if_icmpne,&&opc_if_icmplt,&&opc_if_icmpge, &&opc_if_icmpgt,
576 /* 0xA4 */ &&opc_if_icmple,&&opc_if_acmpeq,&&opc_if_acmpne, &&opc_goto,
577 /* 0xA8 */ &&opc_jsr, &&opc_ret, &&opc_tableswitch,&&opc_lookupswitch,
578 /* 0xAC */ &&opc_ireturn, &&opc_lreturn, &&opc_freturn, &&opc_dreturn,
579
580 /* 0xB0 */ &&opc_areturn, &&opc_return, &&opc_getstatic, &&opc_putstatic,
581 /* 0xB4 */ &&opc_getfield, &&opc_putfield, &&opc_invokevirtual,&&opc_invokespecial,
582 /* 0xB8 */ &&opc_invokestatic,&&opc_invokeinterface,&&opc_invokedynamic,&&opc_new,
583 /* 0xBC */ &&opc_newarray, &&opc_anewarray, &&opc_arraylength, &&opc_athrow,
584
585 /* 0xC0 */ &&opc_checkcast, &&opc_instanceof, &&opc_monitorenter, &&opc_monitorexit,
586 /* 0xC4 */ &&opc_wide, &&opc_multianewarray, &&opc_ifnull, &&opc_ifnonnull,
587 /* 0xC8 */ &&opc_goto_w, &&opc_jsr_w, &&opc_breakpoint, &&opc_default,
588 /* 0xCC */ &&opc_default, &&opc_default, &&opc_default, &&opc_default,
589
590 /* 0xD0 */ &&opc_default, &&opc_default, &&opc_default, &&opc_default,
591 /* 0xD4 */ &&opc_default, &&opc_default, &&opc_default, &&opc_default,
592 /* 0xD8 */ &&opc_default, &&opc_default, &&opc_default, &&opc_default,
593 /* 0xDC */ &&opc_default, &&opc_default, &&opc_default, &&opc_default,
594
595 /* 0xE0 */ &&opc_default, &&opc_default, &&opc_default, &&opc_default,
596 /* 0xE4 */ &&opc_default, &&opc_fast_aldc, &&opc_fast_aldc_w, &&opc_return_register_finalizer,
597 /* 0xE8 */ &&opc_invokehandle,&&opc_default, &&opc_default, &&opc_default,
598 /* 0xEC */ &&opc_default, &&opc_default, &&opc_default, &&opc_default,
599
600 /* 0xF0 */ &&opc_default, &&opc_default, &&opc_default, &&opc_default,
601 /* 0xF4 */ &&opc_default, &&opc_default, &&opc_default, &&opc_default,
602 /* 0xF8 */ &&opc_default, &&opc_default, &&opc_default, &&opc_default,
603 /* 0xFC */ &&opc_default, &&opc_default, &&opc_default, &&opc_default
604 };
605 register uintptr_t *dispatch_table = (uintptr_t*)&opclabels_data[0];
606 #endif /* USELABELS */
607
608 #ifdef ASSERT
609 // this will trigger a VERIFY_OOP on entry
610 if (istate->msg() != initialize && ! METHOD->is_static()) {
611 oop rcvr = LOCALS_OBJECT(0);
612 VERIFY_OOP(rcvr);
613 }
614 #endif
615 // #define HACK
616 #ifdef HACK
617 bool interesting = false;
618 #endif // HACK
619
620 /* QQQ this should be a stack method so we don't know actual direction */
621 guarantee(istate->msg() == initialize ||
622 topOfStack >= istate->stack_limit() &&
623 topOfStack < istate->stack_base(),
624 "Stack top out of range");
625
626 #ifdef CC_INTERP_PROFILE
627 // MethodData's last branch taken count.
628 uint mdo_last_branch_taken_count = 0;
629 #else
630 const uint mdo_last_branch_taken_count = 0;
631 #endif
632
633 switch (istate->msg()) {
634 case initialize: {
635 if (initialized++) ShouldNotReachHere(); // Only one initialize call.
636 _compiling = (UseCompiler || CountCompiledCalls);
637 #ifdef VM_JVMTI
638 _jvmti_interp_events = JvmtiExport::can_post_interpreter_events();
639 #endif
640 return;
641 }
642 break;
643 case method_entry: {
644 THREAD->set_do_not_unlock();
645 // count invocations
646 assert(initialized, "Interpreter not initialized");
647 if (_compiling) {
648 MethodCounters* mcs;
649 GET_METHOD_COUNTERS(mcs);
650 if (ProfileInterpreter) {
651 METHOD->increment_interpreter_invocation_count(THREAD);
652 }
653 mcs->invocation_counter()->increment();
654 if (mcs->invocation_counter()->reached_InvocationLimit(mcs->backedge_counter())) {
655 CALL_VM((void)InterpreterRuntime::frequency_counter_overflow(THREAD, NULL), handle_exception);
656 // We no longer retry on a counter overflow.
657 }
658 // Get or create profile data. Check for pending (async) exceptions.
659 BI_PROFILE_GET_OR_CREATE_METHOD_DATA(handle_exception);
660 SAFEPOINT;
661 }
662
663 if ((istate->_stack_base - istate->_stack_limit) != istate->method()->max_stack() + 1) {
664 // initialize
665 os::breakpoint();
666 }
667
668 #ifdef HACK
669 {
670 ResourceMark rm;
671 char *method_name = istate->method()->name_and_sig_as_C_string();
672 if (strstr(method_name, "runThese$TestRunner.run()V") != NULL) {
673 tty->print_cr("entering: depth %d bci: %d",
674 (istate->_stack_base - istate->_stack),
675 istate->_bcp - istate->_method->code_base());
676 interesting = true;
677 }
678 }
679 #endif // HACK
680
681 // Lock method if synchronized.
682 if (METHOD->is_synchronized()) {
683 // oop rcvr = locals[0].j.r;
684 oop rcvr;
685 if (METHOD->is_static()) {
686 rcvr = METHOD->constants()->pool_holder()->java_mirror();
687 } else {
688 rcvr = LOCALS_OBJECT(0);
689 VERIFY_OOP(rcvr);
690 }
691 // The initial monitor is ours for the taking.
692 // Monitor not filled in frame manager any longer as this caused race condition with biased locking.
693 BasicObjectLock* mon = &istate->monitor_base()[-1];
694 mon->set_obj(rcvr);
695 bool success = false;
696 uintptr_t epoch_mask_in_place = (uintptr_t)markOopDesc::epoch_mask_in_place;
697 markOop mark = rcvr->mark();
698 intptr_t hash = (intptr_t) markOopDesc::no_hash;
699 // Implies UseBiasedLocking.
700 if (mark->has_bias_pattern()) {
701 uintptr_t thread_ident;
702 uintptr_t anticipated_bias_locking_value;
703 thread_ident = (uintptr_t)istate->thread();
704 anticipated_bias_locking_value =
705 (((uintptr_t)rcvr->klass()->prototype_header() | thread_ident) ^ (uintptr_t)mark) &
706 ~((uintptr_t) markOopDesc::age_mask_in_place);
707
708 if (anticipated_bias_locking_value == 0) {
709 // Already biased towards this thread, nothing to do.
710 if (PrintBiasedLockingStatistics) {
711 (* BiasedLocking::biased_lock_entry_count_addr())++;
712 }
713 success = true;
714 } else if ((anticipated_bias_locking_value & markOopDesc::biased_lock_mask_in_place) != 0) {
715 // Try to revoke bias.
716 markOop header = rcvr->klass()->prototype_header();
717 if (hash != markOopDesc::no_hash) {
718 header = header->copy_set_hash(hash);
719 }
720 if (Atomic::cmpxchg_ptr(header, rcvr->mark_addr(), mark) == mark) {
721 if (PrintBiasedLockingStatistics)
722 (*BiasedLocking::revoked_lock_entry_count_addr())++;
723 }
724 } else if ((anticipated_bias_locking_value & epoch_mask_in_place) != 0) {
725 // Try to rebias.
726 markOop new_header = (markOop) ( (intptr_t) rcvr->klass()->prototype_header() | thread_ident);
727 if (hash != markOopDesc::no_hash) {
728 new_header = new_header->copy_set_hash(hash);
729 }
730 if (Atomic::cmpxchg_ptr((void*)new_header, rcvr->mark_addr(), mark) == mark) {
731 if (PrintBiasedLockingStatistics) {
732 (* BiasedLocking::rebiased_lock_entry_count_addr())++;
733 }
734 } else {
735 CALL_VM(InterpreterRuntime::monitorenter(THREAD, mon), handle_exception);
736 }
737 success = true;
738 } else {
739 // Try to bias towards thread in case object is anonymously biased.
740 markOop header = (markOop) ((uintptr_t) mark &
741 ((uintptr_t)markOopDesc::biased_lock_mask_in_place |
742 (uintptr_t)markOopDesc::age_mask_in_place | epoch_mask_in_place));
743 if (hash != markOopDesc::no_hash) {
744 header = header->copy_set_hash(hash);
745 }
746 markOop new_header = (markOop) ((uintptr_t) header | thread_ident);
747 // Debugging hint.
748 DEBUG_ONLY(mon->lock()->set_displaced_header((markOop) (uintptr_t) 0xdeaddead);)
749 if (Atomic::cmpxchg_ptr((void*)new_header, rcvr->mark_addr(), header) == header) {
750 if (PrintBiasedLockingStatistics) {
751 (* BiasedLocking::anonymously_biased_lock_entry_count_addr())++;
752 }
753 } else {
754 CALL_VM(InterpreterRuntime::monitorenter(THREAD, mon), handle_exception);
755 }
756 success = true;
757 }
758 }
759
760 // Traditional lightweight locking.
761 if (!success) {
762 markOop displaced = rcvr->mark()->set_unlocked();
763 mon->lock()->set_displaced_header(displaced);
764 bool call_vm = UseHeavyMonitors;
765 if (call_vm || Atomic::cmpxchg_ptr(mon, rcvr->mark_addr(), displaced) != displaced) {
766 // Is it simple recursive case?
767 if (!call_vm && THREAD->is_lock_owned((address) displaced->clear_lock_bits())) {
768 mon->lock()->set_displaced_header(NULL);
769 } else {
770 CALL_VM(InterpreterRuntime::monitorenter(THREAD, mon), handle_exception);
771 }
772 }
773 }
774 }
775 THREAD->clr_do_not_unlock();
776
777 // Notify jvmti
778 #ifdef VM_JVMTI
779 if (_jvmti_interp_events) {
780 // Whenever JVMTI puts a thread in interp_only_mode, method
781 // entry/exit events are sent for that thread to track stack depth.
782 if (THREAD->is_interp_only_mode()) {
783 CALL_VM(InterpreterRuntime::post_method_entry(THREAD),
784 handle_exception);
785 }
786 }
787 #endif /* VM_JVMTI */
788
789 goto run;
790 }
791
792 case popping_frame: {
793 // returned from a java call to pop the frame, restart the call
794 // clear the message so we don't confuse ourselves later
795 assert(THREAD->pop_frame_in_process(), "wrong frame pop state");
796 istate->set_msg(no_request);
797 if (_compiling) {
798 // Set MDX back to the ProfileData of the invoke bytecode that will be
799 // restarted.
800 SET_MDX(NULL);
801 BI_PROFILE_GET_OR_CREATE_METHOD_DATA(handle_exception);
802 }
803 THREAD->clr_pop_frame_in_process();
804 goto run;
805 }
806
807 case method_resume: {
808 if ((istate->_stack_base - istate->_stack_limit) != istate->method()->max_stack() + 1) {
809 // resume
810 os::breakpoint();
811 }
812 #ifdef HACK
813 {
814 ResourceMark rm;
815 char *method_name = istate->method()->name_and_sig_as_C_string();
816 if (strstr(method_name, "runThese$TestRunner.run()V") != NULL) {
817 tty->print_cr("resume: depth %d bci: %d",
818 (istate->_stack_base - istate->_stack) ,
819 istate->_bcp - istate->_method->code_base());
820 interesting = true;
821 }
822 }
823 #endif // HACK
824 // returned from a java call, continue executing.
825 if (THREAD->pop_frame_pending() && !THREAD->pop_frame_in_process()) {
826 goto handle_Pop_Frame;
827 }
828 if (THREAD->jvmti_thread_state() &&
829 THREAD->jvmti_thread_state()->is_earlyret_pending()) {
830 goto handle_Early_Return;
831 }
832
833 if (THREAD->has_pending_exception()) goto handle_exception;
834 // Update the pc by the saved amount of the invoke bytecode size
835 UPDATE_PC(istate->bcp_advance());
836
837 if (_compiling) {
838 // Get or create profile data. Check for pending (async) exceptions.
839 BI_PROFILE_GET_OR_CREATE_METHOD_DATA(handle_exception);
840 }
841 goto run;
842 }
843
844 case deopt_resume2: {
845 // Returned from an opcode that will reexecute. Deopt was
846 // a result of a PopFrame request.
847 //
848
849 if (_compiling) {
850 // Get or create profile data. Check for pending (async) exceptions.
851 BI_PROFILE_GET_OR_CREATE_METHOD_DATA(handle_exception);
852 }
853 goto run;
854 }
855
856 case deopt_resume: {
857 // Returned from an opcode that has completed. The stack has
858 // the result all we need to do is skip across the bytecode
859 // and continue (assuming there is no exception pending)
860 //
861 // compute continuation length
862 //
863 // Note: it is possible to deopt at a return_register_finalizer opcode
864 // because this requires entering the vm to do the registering. While the
865 // opcode is complete we can't advance because there are no more opcodes
866 // much like trying to deopt at a poll return. In that has we simply
867 // get out of here
868 //
869 if ( Bytecodes::code_at(METHOD, pc) == Bytecodes::_return_register_finalizer) {
870 // this will do the right thing even if an exception is pending.
871 goto handle_return;
872 }
873 UPDATE_PC(Bytecodes::length_at(METHOD, pc));
874 if (THREAD->has_pending_exception()) goto handle_exception;
875
876 if (_compiling) {
877 // Get or create profile data. Check for pending (async) exceptions.
878 BI_PROFILE_GET_OR_CREATE_METHOD_DATA(handle_exception);
879 }
880 goto run;
881 }
882 case got_monitors: {
883 // continue locking now that we have a monitor to use
884 // we expect to find newly allocated monitor at the "top" of the monitor stack.
885 oop lockee = STACK_OBJECT(-1);
886 VERIFY_OOP(lockee);
887 // derefing's lockee ought to provoke implicit null check
888 // find a free monitor
889 BasicObjectLock* entry = (BasicObjectLock*) istate->stack_base();
890 assert(entry->obj() == NULL, "Frame manager didn't allocate the monitor");
891 entry->set_obj(lockee);
892 bool success = false;
893 uintptr_t epoch_mask_in_place = (uintptr_t)markOopDesc::epoch_mask_in_place;
894
895 markOop mark = lockee->mark();
896 intptr_t hash = (intptr_t) markOopDesc::no_hash;
897 // implies UseBiasedLocking
898 if (mark->has_bias_pattern()) {
899 uintptr_t thread_ident;
900 uintptr_t anticipated_bias_locking_value;
901 thread_ident = (uintptr_t)istate->thread();
902 anticipated_bias_locking_value =
903 (((uintptr_t)lockee->klass()->prototype_header() | thread_ident) ^ (uintptr_t)mark) &
904 ~((uintptr_t) markOopDesc::age_mask_in_place);
905
906 if (anticipated_bias_locking_value == 0) {
907 // already biased towards this thread, nothing to do
908 if (PrintBiasedLockingStatistics) {
909 (* BiasedLocking::biased_lock_entry_count_addr())++;
910 }
911 success = true;
912 } else if ((anticipated_bias_locking_value & markOopDesc::biased_lock_mask_in_place) != 0) {
913 // try revoke bias
914 markOop header = lockee->klass()->prototype_header();
915 if (hash != markOopDesc::no_hash) {
916 header = header->copy_set_hash(hash);
917 }
918 if (Atomic::cmpxchg_ptr(header, lockee->mark_addr(), mark) == mark) {
919 if (PrintBiasedLockingStatistics) {
920 (*BiasedLocking::revoked_lock_entry_count_addr())++;
921 }
922 }
923 } else if ((anticipated_bias_locking_value & epoch_mask_in_place) !=0) {
924 // try rebias
925 markOop new_header = (markOop) ( (intptr_t) lockee->klass()->prototype_header() | thread_ident);
926 if (hash != markOopDesc::no_hash) {
927 new_header = new_header->copy_set_hash(hash);
928 }
929 if (Atomic::cmpxchg_ptr((void*)new_header, lockee->mark_addr(), mark) == mark) {
930 if (PrintBiasedLockingStatistics) {
931 (* BiasedLocking::rebiased_lock_entry_count_addr())++;
932 }
933 } else {
934 CALL_VM(InterpreterRuntime::monitorenter(THREAD, entry), handle_exception);
935 }
936 success = true;
937 } else {
938 // try to bias towards thread in case object is anonymously biased
939 markOop header = (markOop) ((uintptr_t) mark & ((uintptr_t)markOopDesc::biased_lock_mask_in_place |
940 (uintptr_t)markOopDesc::age_mask_in_place | epoch_mask_in_place));
941 if (hash != markOopDesc::no_hash) {
942 header = header->copy_set_hash(hash);
943 }
944 markOop new_header = (markOop) ((uintptr_t) header | thread_ident);
945 // debugging hint
946 DEBUG_ONLY(entry->lock()->set_displaced_header((markOop) (uintptr_t) 0xdeaddead);)
947 if (Atomic::cmpxchg_ptr((void*)new_header, lockee->mark_addr(), header) == header) {
948 if (PrintBiasedLockingStatistics) {
949 (* BiasedLocking::anonymously_biased_lock_entry_count_addr())++;
950 }
951 } else {
952 CALL_VM(InterpreterRuntime::monitorenter(THREAD, entry), handle_exception);
953 }
954 success = true;
955 }
956 }
957
958 // traditional lightweight locking
959 if (!success) {
960 markOop displaced = lockee->mark()->set_unlocked();
961 entry->lock()->set_displaced_header(displaced);
962 bool call_vm = UseHeavyMonitors;
963 if (call_vm || Atomic::cmpxchg_ptr(entry, lockee->mark_addr(), displaced) != displaced) {
964 // Is it simple recursive case?
965 if (!call_vm && THREAD->is_lock_owned((address) displaced->clear_lock_bits())) {
966 entry->lock()->set_displaced_header(NULL);
967 } else {
968 CALL_VM(InterpreterRuntime::monitorenter(THREAD, entry), handle_exception);
969 }
970 }
971 }
972 UPDATE_PC_AND_TOS(1, -1);
973 goto run;
974 }
975 default: {
976 fatal("Unexpected message from frame manager");
977 }
978 }
979
980 run:
981
982 DO_UPDATE_INSTRUCTION_COUNT(*pc)
983 DEBUGGER_SINGLE_STEP_NOTIFY();
984 #ifdef PREFETCH_OPCCODE
985 opcode = *pc; /* prefetch first opcode */
986 #endif
987
988 #ifndef USELABELS
989 while (1)
990 #endif
991 {
992 #ifndef PREFETCH_OPCCODE
993 opcode = *pc;
994 #endif
995 // Seems like this happens twice per opcode. At worst this is only
996 // need at entry to the loop.
997 // DEBUGGER_SINGLE_STEP_NOTIFY();
998 /* Using this labels avoids double breakpoints when quickening and
999 * when returing from transition frames.
1000 */
1001 opcode_switch:
1002 assert(istate == orig, "Corrupted istate");
1003 /* QQQ Hmm this has knowledge of direction, ought to be a stack method */
1004 assert(topOfStack >= istate->stack_limit(), "Stack overrun");
1005 assert(topOfStack < istate->stack_base(), "Stack underrun");
1006
1007 #ifdef USELABELS
1008 DISPATCH(opcode);
1009 #else
1010 switch (opcode)
1011 #endif
1012 {
1013 CASE(_nop):
1014 UPDATE_PC_AND_CONTINUE(1);
1015
1016 /* Push miscellaneous constants onto the stack. */
1017
1018 CASE(_aconst_null):
1019 SET_STACK_OBJECT(NULL, 0);
1020 UPDATE_PC_AND_TOS_AND_CONTINUE(1, 1);
1021
1022 #undef OPC_CONST_n
1023 #define OPC_CONST_n(opcode, const_type, value) \
1024 CASE(opcode): \
1025 SET_STACK_ ## const_type(value, 0); \
1026 UPDATE_PC_AND_TOS_AND_CONTINUE(1, 1);
1027
1028 OPC_CONST_n(_iconst_m1, INT, -1);
1029 OPC_CONST_n(_iconst_0, INT, 0);
1030 OPC_CONST_n(_iconst_1, INT, 1);
1031 OPC_CONST_n(_iconst_2, INT, 2);
1032 OPC_CONST_n(_iconst_3, INT, 3);
1033 OPC_CONST_n(_iconst_4, INT, 4);
1034 OPC_CONST_n(_iconst_5, INT, 5);
1035 OPC_CONST_n(_fconst_0, FLOAT, 0.0);
1036 OPC_CONST_n(_fconst_1, FLOAT, 1.0);
1037 OPC_CONST_n(_fconst_2, FLOAT, 2.0);
1038
1039 #undef OPC_CONST2_n
1040 #define OPC_CONST2_n(opcname, value, key, kind) \
1041 CASE(_##opcname): \
1042 { \
1043 SET_STACK_ ## kind(VM##key##Const##value(), 1); \
1044 UPDATE_PC_AND_TOS_AND_CONTINUE(1, 2); \
1045 }
1046 OPC_CONST2_n(dconst_0, Zero, double, DOUBLE);
1047 OPC_CONST2_n(dconst_1, One, double, DOUBLE);
1048 OPC_CONST2_n(lconst_0, Zero, long, LONG);
1049 OPC_CONST2_n(lconst_1, One, long, LONG);
1050
1051 /* Load constant from constant pool: */
1052
1053 /* Push a 1-byte signed integer value onto the stack. */
1054 CASE(_bipush):
1055 SET_STACK_INT((jbyte)(pc[1]), 0);
1056 UPDATE_PC_AND_TOS_AND_CONTINUE(2, 1);
1057
1058 /* Push a 2-byte signed integer constant onto the stack. */
1059 CASE(_sipush):
1060 SET_STACK_INT((int16_t)Bytes::get_Java_u2(pc + 1), 0);
1061 UPDATE_PC_AND_TOS_AND_CONTINUE(3, 1);
1062
1063 /* load from local variable */
1064
1065 CASE(_aload):
1066 VERIFY_OOP(LOCALS_OBJECT(pc[1]));
1067 SET_STACK_OBJECT(LOCALS_OBJECT(pc[1]), 0);
1068 UPDATE_PC_AND_TOS_AND_CONTINUE(2, 1);
1069
1070 CASE(_iload):
1071 CASE(_fload):
1072 SET_STACK_SLOT(LOCALS_SLOT(pc[1]), 0);
1073 UPDATE_PC_AND_TOS_AND_CONTINUE(2, 1);
1074
1075 CASE(_lload):
1076 SET_STACK_LONG_FROM_ADDR(LOCALS_LONG_AT(pc[1]), 1);
1077 UPDATE_PC_AND_TOS_AND_CONTINUE(2, 2);
1078
1079 CASE(_dload):
1080 SET_STACK_DOUBLE_FROM_ADDR(LOCALS_DOUBLE_AT(pc[1]), 1);
1081 UPDATE_PC_AND_TOS_AND_CONTINUE(2, 2);
1082
1083 #undef OPC_LOAD_n
1084 #define OPC_LOAD_n(num) \
1085 CASE(_aload_##num): \
1086 VERIFY_OOP(LOCALS_OBJECT(num)); \
1087 SET_STACK_OBJECT(LOCALS_OBJECT(num), 0); \
1088 UPDATE_PC_AND_TOS_AND_CONTINUE(1, 1); \
1089 \
1090 CASE(_iload_##num): \
1091 CASE(_fload_##num): \
1092 SET_STACK_SLOT(LOCALS_SLOT(num), 0); \
1093 UPDATE_PC_AND_TOS_AND_CONTINUE(1, 1); \
1094 \
1095 CASE(_lload_##num): \
1096 SET_STACK_LONG_FROM_ADDR(LOCALS_LONG_AT(num), 1); \
1097 UPDATE_PC_AND_TOS_AND_CONTINUE(1, 2); \
1098 CASE(_dload_##num): \
1099 SET_STACK_DOUBLE_FROM_ADDR(LOCALS_DOUBLE_AT(num), 1); \
1100 UPDATE_PC_AND_TOS_AND_CONTINUE(1, 2);
1101
1102 OPC_LOAD_n(0);
1103 OPC_LOAD_n(1);
1104 OPC_LOAD_n(2);
1105 OPC_LOAD_n(3);
1106
1107 /* store to a local variable */
1108
1109 CASE(_astore):
1110 astore(topOfStack, -1, locals, pc[1]);
1111 UPDATE_PC_AND_TOS_AND_CONTINUE(2, -1);
1112
1113 CASE(_istore):
1114 CASE(_fstore):
1115 SET_LOCALS_SLOT(STACK_SLOT(-1), pc[1]);
1116 UPDATE_PC_AND_TOS_AND_CONTINUE(2, -1);
1117
1118 CASE(_lstore):
1119 SET_LOCALS_LONG(STACK_LONG(-1), pc[1]);
1120 UPDATE_PC_AND_TOS_AND_CONTINUE(2, -2);
1121
1122 CASE(_dstore):
1123 SET_LOCALS_DOUBLE(STACK_DOUBLE(-1), pc[1]);
1124 UPDATE_PC_AND_TOS_AND_CONTINUE(2, -2);
1125
1126 CASE(_wide): {
1127 uint16_t reg = Bytes::get_Java_u2(pc + 2);
1128
1129 opcode = pc[1];
1130
1131 // Wide and it's sub-bytecode are counted as separate instructions. If we
1132 // don't account for this here, the bytecode trace skips the next bytecode.
1133 DO_UPDATE_INSTRUCTION_COUNT(opcode);
1134
1135 switch(opcode) {
1136 case Bytecodes::_aload:
1137 VERIFY_OOP(LOCALS_OBJECT(reg));
1138 SET_STACK_OBJECT(LOCALS_OBJECT(reg), 0);
1139 UPDATE_PC_AND_TOS_AND_CONTINUE(4, 1);
1140
1141 case Bytecodes::_iload:
1142 case Bytecodes::_fload:
1143 SET_STACK_SLOT(LOCALS_SLOT(reg), 0);
1144 UPDATE_PC_AND_TOS_AND_CONTINUE(4, 1);
1145
1146 case Bytecodes::_lload:
1147 SET_STACK_LONG_FROM_ADDR(LOCALS_LONG_AT(reg), 1);
1148 UPDATE_PC_AND_TOS_AND_CONTINUE(4, 2);
1149
1150 case Bytecodes::_dload:
1151 SET_STACK_DOUBLE_FROM_ADDR(LOCALS_LONG_AT(reg), 1);
1152 UPDATE_PC_AND_TOS_AND_CONTINUE(4, 2);
1153
1154 case Bytecodes::_astore:
1155 astore(topOfStack, -1, locals, reg);
1156 UPDATE_PC_AND_TOS_AND_CONTINUE(4, -1);
1157
1158 case Bytecodes::_istore:
1159 case Bytecodes::_fstore:
1160 SET_LOCALS_SLOT(STACK_SLOT(-1), reg);
1161 UPDATE_PC_AND_TOS_AND_CONTINUE(4, -1);
1162
1163 case Bytecodes::_lstore:
1164 SET_LOCALS_LONG(STACK_LONG(-1), reg);
1165 UPDATE_PC_AND_TOS_AND_CONTINUE(4, -2);
1166
1167 case Bytecodes::_dstore:
1168 SET_LOCALS_DOUBLE(STACK_DOUBLE(-1), reg);
1169 UPDATE_PC_AND_TOS_AND_CONTINUE(4, -2);
1170
1171 case Bytecodes::_iinc: {
1172 int16_t offset = (int16_t)Bytes::get_Java_u2(pc+4);
1173 // Be nice to see what this generates.... QQQ
1174 SET_LOCALS_INT(LOCALS_INT(reg) + offset, reg);
1175 UPDATE_PC_AND_CONTINUE(6);
1176 }
1177 case Bytecodes::_ret:
1178 // Profile ret.
1179 BI_PROFILE_UPDATE_RET(/*bci=*/((int)(intptr_t)(LOCALS_ADDR(reg))));
1180 // Now, update the pc.
1181 pc = istate->method()->code_base() + (intptr_t)(LOCALS_ADDR(reg));
1182 UPDATE_PC_AND_CONTINUE(0);
1183 default:
1184 VM_JAVA_ERROR(vmSymbols::java_lang_InternalError(), "undefined opcode", note_no_trap);
1185 }
1186 }
1187
1188
1189 #undef OPC_STORE_n
1190 #define OPC_STORE_n(num) \
1191 CASE(_astore_##num): \
1192 astore(topOfStack, -1, locals, num); \
1193 UPDATE_PC_AND_TOS_AND_CONTINUE(1, -1); \
1194 CASE(_istore_##num): \
1195 CASE(_fstore_##num): \
1196 SET_LOCALS_SLOT(STACK_SLOT(-1), num); \
1197 UPDATE_PC_AND_TOS_AND_CONTINUE(1, -1);
1198
1199 OPC_STORE_n(0);
1200 OPC_STORE_n(1);
1201 OPC_STORE_n(2);
1202 OPC_STORE_n(3);
1203
1204 #undef OPC_DSTORE_n
1205 #define OPC_DSTORE_n(num) \
1206 CASE(_dstore_##num): \
1207 SET_LOCALS_DOUBLE(STACK_DOUBLE(-1), num); \
1208 UPDATE_PC_AND_TOS_AND_CONTINUE(1, -2); \
1209 CASE(_lstore_##num): \
1210 SET_LOCALS_LONG(STACK_LONG(-1), num); \
1211 UPDATE_PC_AND_TOS_AND_CONTINUE(1, -2);
1212
1213 OPC_DSTORE_n(0);
1214 OPC_DSTORE_n(1);
1215 OPC_DSTORE_n(2);
1216 OPC_DSTORE_n(3);
1217
1218 /* stack pop, dup, and insert opcodes */
1219
1220
1221 CASE(_pop): /* Discard the top item on the stack */
1222 UPDATE_PC_AND_TOS_AND_CONTINUE(1, -1);
1223
1224
1225 CASE(_pop2): /* Discard the top 2 items on the stack */
1226 UPDATE_PC_AND_TOS_AND_CONTINUE(1, -2);
1227
1228
1229 CASE(_dup): /* Duplicate the top item on the stack */
1230 dup(topOfStack);
1231 UPDATE_PC_AND_TOS_AND_CONTINUE(1, 1);
1232
1233 CASE(_dup2): /* Duplicate the top 2 items on the stack */
1234 dup2(topOfStack);
1235 UPDATE_PC_AND_TOS_AND_CONTINUE(1, 2);
1236
1237 CASE(_dup_x1): /* insert top word two down */
1238 dup_x1(topOfStack);
1239 UPDATE_PC_AND_TOS_AND_CONTINUE(1, 1);
1240
1241 CASE(_dup_x2): /* insert top word three down */
1242 dup_x2(topOfStack);
1243 UPDATE_PC_AND_TOS_AND_CONTINUE(1, 1);
1244
1245 CASE(_dup2_x1): /* insert top 2 slots three down */
1246 dup2_x1(topOfStack);
1247 UPDATE_PC_AND_TOS_AND_CONTINUE(1, 2);
1248
1249 CASE(_dup2_x2): /* insert top 2 slots four down */
1250 dup2_x2(topOfStack);
1251 UPDATE_PC_AND_TOS_AND_CONTINUE(1, 2);
1252
1253 CASE(_swap): { /* swap top two elements on the stack */
1254 swap(topOfStack);
1255 UPDATE_PC_AND_CONTINUE(1);
1256 }
1257
1258 /* Perform various binary integer operations */
1259
1260 #undef OPC_INT_BINARY
1261 #define OPC_INT_BINARY(opcname, opname, test) \
1262 CASE(_i##opcname): \
1263 if (test && (STACK_INT(-1) == 0)) { \
1264 VM_JAVA_ERROR(vmSymbols::java_lang_ArithmeticException(), \
1265 "/ by zero", note_div0Check_trap); \
1266 } \
1267 SET_STACK_INT(VMint##opname(STACK_INT(-2), \
1268 STACK_INT(-1)), \
1269 -2); \
1270 UPDATE_PC_AND_TOS_AND_CONTINUE(1, -1); \
1271 CASE(_l##opcname): \
1272 { \
1273 if (test) { \
1274 jlong l1 = STACK_LONG(-1); \
1275 if (VMlongEqz(l1)) { \
1276 VM_JAVA_ERROR(vmSymbols::java_lang_ArithmeticException(), \
1277 "/ by long zero", note_div0Check_trap); \
1278 } \
1279 } \
1280 /* First long at (-1,-2) next long at (-3,-4) */ \
1281 SET_STACK_LONG(VMlong##opname(STACK_LONG(-3), \
1282 STACK_LONG(-1)), \
1283 -3); \
1284 UPDATE_PC_AND_TOS_AND_CONTINUE(1, -2); \
1285 }
1286
1287 OPC_INT_BINARY(add, Add, 0);
1288 OPC_INT_BINARY(sub, Sub, 0);
1289 OPC_INT_BINARY(mul, Mul, 0);
1290 OPC_INT_BINARY(and, And, 0);
1291 OPC_INT_BINARY(or, Or, 0);
1292 OPC_INT_BINARY(xor, Xor, 0);
1293 OPC_INT_BINARY(div, Div, 1);
1294 OPC_INT_BINARY(rem, Rem, 1);
1295
1296
1297 /* Perform various binary floating number operations */
1298 /* On some machine/platforms/compilers div zero check can be implicit */
1299
1300 #undef OPC_FLOAT_BINARY
1301 #define OPC_FLOAT_BINARY(opcname, opname) \
1302 CASE(_d##opcname): { \
1303 SET_STACK_DOUBLE(VMdouble##opname(STACK_DOUBLE(-3), \
1304 STACK_DOUBLE(-1)), \
1305 -3); \
1306 UPDATE_PC_AND_TOS_AND_CONTINUE(1, -2); \
1307 } \
1308 CASE(_f##opcname): \
1309 SET_STACK_FLOAT(VMfloat##opname(STACK_FLOAT(-2), \
1310 STACK_FLOAT(-1)), \
1311 -2); \
1312 UPDATE_PC_AND_TOS_AND_CONTINUE(1, -1);
1313
1314
1315 OPC_FLOAT_BINARY(add, Add);
1316 OPC_FLOAT_BINARY(sub, Sub);
1317 OPC_FLOAT_BINARY(mul, Mul);
1318 OPC_FLOAT_BINARY(div, Div);
1319 OPC_FLOAT_BINARY(rem, Rem);
1320
1321 /* Shift operations
1322 * Shift left int and long: ishl, lshl
1323 * Logical shift right int and long w/zero extension: iushr, lushr
1324 * Arithmetic shift right int and long w/sign extension: ishr, lshr
1325 */
1326
1327 #undef OPC_SHIFT_BINARY
1328 #define OPC_SHIFT_BINARY(opcname, opname) \
1329 CASE(_i##opcname): \
1330 SET_STACK_INT(VMint##opname(STACK_INT(-2), \
1331 STACK_INT(-1)), \
1332 -2); \
1333 UPDATE_PC_AND_TOS_AND_CONTINUE(1, -1); \
1334 CASE(_l##opcname): \
1335 { \
1336 SET_STACK_LONG(VMlong##opname(STACK_LONG(-2), \
1337 STACK_INT(-1)), \
1338 -2); \
1339 UPDATE_PC_AND_TOS_AND_CONTINUE(1, -1); \
1340 }
1341
1342 OPC_SHIFT_BINARY(shl, Shl);
1343 OPC_SHIFT_BINARY(shr, Shr);
1344 OPC_SHIFT_BINARY(ushr, Ushr);
1345
1346 /* Increment local variable by constant */
1347 CASE(_iinc):
1348 {
1349 // locals[pc[1]].j.i += (jbyte)(pc[2]);
1350 SET_LOCALS_INT(LOCALS_INT(pc[1]) + (jbyte)(pc[2]), pc[1]);
1351 UPDATE_PC_AND_CONTINUE(3);
1352 }
1353
1354 /* negate the value on the top of the stack */
1355
1356 CASE(_ineg):
1357 SET_STACK_INT(VMintNeg(STACK_INT(-1)), -1);
1358 UPDATE_PC_AND_CONTINUE(1);
1359
1360 CASE(_fneg):
1361 SET_STACK_FLOAT(VMfloatNeg(STACK_FLOAT(-1)), -1);
1362 UPDATE_PC_AND_CONTINUE(1);
1363
1364 CASE(_lneg):
1365 {
1366 SET_STACK_LONG(VMlongNeg(STACK_LONG(-1)), -1);
1367 UPDATE_PC_AND_CONTINUE(1);
1368 }
1369
1370 CASE(_dneg):
1371 {
1372 SET_STACK_DOUBLE(VMdoubleNeg(STACK_DOUBLE(-1)), -1);
1373 UPDATE_PC_AND_CONTINUE(1);
1374 }
1375
1376 /* Conversion operations */
1377
1378 CASE(_i2f): /* convert top of stack int to float */
1379 SET_STACK_FLOAT(VMint2Float(STACK_INT(-1)), -1);
1380 UPDATE_PC_AND_CONTINUE(1);
1381
1382 CASE(_i2l): /* convert top of stack int to long */
1383 {
1384 // this is ugly QQQ
1385 jlong r = VMint2Long(STACK_INT(-1));
1386 MORE_STACK(-1); // Pop
1387 SET_STACK_LONG(r, 1);
1388
1389 UPDATE_PC_AND_TOS_AND_CONTINUE(1, 2);
1390 }
1391
1392 CASE(_i2d): /* convert top of stack int to double */
1393 {
1394 // this is ugly QQQ (why cast to jlong?? )
1395 jdouble r = (jlong)STACK_INT(-1);
1396 MORE_STACK(-1); // Pop
1397 SET_STACK_DOUBLE(r, 1);
1398
1399 UPDATE_PC_AND_TOS_AND_CONTINUE(1, 2);
1400 }
1401
1402 CASE(_l2i): /* convert top of stack long to int */
1403 {
1404 jint r = VMlong2Int(STACK_LONG(-1));
1405 MORE_STACK(-2); // Pop
1406 SET_STACK_INT(r, 0);
1407 UPDATE_PC_AND_TOS_AND_CONTINUE(1, 1);
1408 }
1409
1410 CASE(_l2f): /* convert top of stack long to float */
1411 {
1412 jlong r = STACK_LONG(-1);
1413 MORE_STACK(-2); // Pop
1414 SET_STACK_FLOAT(VMlong2Float(r), 0);
1415 UPDATE_PC_AND_TOS_AND_CONTINUE(1, 1);
1416 }
1417
1418 CASE(_l2d): /* convert top of stack long to double */
1419 {
1420 jlong r = STACK_LONG(-1);
1421 MORE_STACK(-2); // Pop
1422 SET_STACK_DOUBLE(VMlong2Double(r), 1);
1423 UPDATE_PC_AND_TOS_AND_CONTINUE(1, 2);
1424 }
1425
1426 CASE(_f2i): /* Convert top of stack float to int */
1427 SET_STACK_INT(SharedRuntime::f2i(STACK_FLOAT(-1)), -1);
1428 UPDATE_PC_AND_CONTINUE(1);
1429
1430 CASE(_f2l): /* convert top of stack float to long */
1431 {
1432 jlong r = SharedRuntime::f2l(STACK_FLOAT(-1));
1433 MORE_STACK(-1); // POP
1434 SET_STACK_LONG(r, 1);
1435 UPDATE_PC_AND_TOS_AND_CONTINUE(1, 2);
1436 }
1437
1438 CASE(_f2d): /* convert top of stack float to double */
1439 {
1440 jfloat f;
1441 jdouble r;
1442 f = STACK_FLOAT(-1);
1443 r = (jdouble) f;
1444 MORE_STACK(-1); // POP
1445 SET_STACK_DOUBLE(r, 1);
1446 UPDATE_PC_AND_TOS_AND_CONTINUE(1, 2);
1447 }
1448
1449 CASE(_d2i): /* convert top of stack double to int */
1450 {
1451 jint r1 = SharedRuntime::d2i(STACK_DOUBLE(-1));
1452 MORE_STACK(-2);
1453 SET_STACK_INT(r1, 0);
1454 UPDATE_PC_AND_TOS_AND_CONTINUE(1, 1);
1455 }
1456
1457 CASE(_d2f): /* convert top of stack double to float */
1458 {
1459 jfloat r1 = VMdouble2Float(STACK_DOUBLE(-1));
1460 MORE_STACK(-2);
1461 SET_STACK_FLOAT(r1, 0);
1462 UPDATE_PC_AND_TOS_AND_CONTINUE(1, 1);
1463 }
1464
1465 CASE(_d2l): /* convert top of stack double to long */
1466 {
1467 jlong r1 = SharedRuntime::d2l(STACK_DOUBLE(-1));
1468 MORE_STACK(-2);
1469 SET_STACK_LONG(r1, 1);
1470 UPDATE_PC_AND_TOS_AND_CONTINUE(1, 2);
1471 }
1472
1473 CASE(_i2b):
1474 SET_STACK_INT(VMint2Byte(STACK_INT(-1)), -1);
1475 UPDATE_PC_AND_CONTINUE(1);
1476
1477 CASE(_i2c):
1478 SET_STACK_INT(VMint2Char(STACK_INT(-1)), -1);
1479 UPDATE_PC_AND_CONTINUE(1);
1480
1481 CASE(_i2s):
1482 SET_STACK_INT(VMint2Short(STACK_INT(-1)), -1);
1483 UPDATE_PC_AND_CONTINUE(1);
1484
1485 /* comparison operators */
1486
1487
1488 #define COMPARISON_OP(name, comparison) \
1489 CASE(_if_icmp##name): { \
1490 const bool cmp = (STACK_INT(-2) comparison STACK_INT(-1)); \
1491 int skip = cmp \
1492 ? (int16_t)Bytes::get_Java_u2(pc + 1) : 3; \
1493 address branch_pc = pc; \
1494 /* Profile branch. */ \
1495 BI_PROFILE_UPDATE_BRANCH(/*is_taken=*/cmp); \
1496 UPDATE_PC_AND_TOS(skip, -2); \
1497 DO_BACKEDGE_CHECKS(skip, branch_pc); \
1498 CONTINUE; \
1499 } \
1500 CASE(_if##name): { \
1501 const bool cmp = (STACK_INT(-1) comparison 0); \
1502 int skip = cmp \
1503 ? (int16_t)Bytes::get_Java_u2(pc + 1) : 3; \
1504 address branch_pc = pc; \
1505 /* Profile branch. */ \
1506 BI_PROFILE_UPDATE_BRANCH(/*is_taken=*/cmp); \
1507 UPDATE_PC_AND_TOS(skip, -1); \
1508 DO_BACKEDGE_CHECKS(skip, branch_pc); \
1509 CONTINUE; \
1510 }
1511
1512 #define COMPARISON_OP2(name, comparison) \
1513 COMPARISON_OP(name, comparison) \
1514 CASE(_if_acmp##name): { \
1515 const bool cmp = (STACK_OBJECT(-2) comparison STACK_OBJECT(-1)); \
1516 int skip = cmp \
1517 ? (int16_t)Bytes::get_Java_u2(pc + 1) : 3; \
1518 address branch_pc = pc; \
1519 /* Profile branch. */ \
1520 BI_PROFILE_UPDATE_BRANCH(/*is_taken=*/cmp); \
1521 UPDATE_PC_AND_TOS(skip, -2); \
1522 DO_BACKEDGE_CHECKS(skip, branch_pc); \
1523 CONTINUE; \
1524 }
1525
1526 #define NULL_COMPARISON_NOT_OP(name) \
1527 CASE(_if##name): { \
1528 const bool cmp = (!(STACK_OBJECT(-1) == NULL)); \
1529 int skip = cmp \
1530 ? (int16_t)Bytes::get_Java_u2(pc + 1) : 3; \
1531 address branch_pc = pc; \
1532 /* Profile branch. */ \
1533 BI_PROFILE_UPDATE_BRANCH(/*is_taken=*/cmp); \
1534 UPDATE_PC_AND_TOS(skip, -1); \
1535 DO_BACKEDGE_CHECKS(skip, branch_pc); \
1536 CONTINUE; \
1537 }
1538
1539 #define NULL_COMPARISON_OP(name) \
1540 CASE(_if##name): { \
1541 const bool cmp = ((STACK_OBJECT(-1) == NULL)); \
1542 int skip = cmp \
1543 ? (int16_t)Bytes::get_Java_u2(pc + 1) : 3; \
1544 address branch_pc = pc; \
1545 /* Profile branch. */ \
1546 BI_PROFILE_UPDATE_BRANCH(/*is_taken=*/cmp); \
1547 UPDATE_PC_AND_TOS(skip, -1); \
1548 DO_BACKEDGE_CHECKS(skip, branch_pc); \
1549 CONTINUE; \
1550 }
1551 COMPARISON_OP(lt, <);
1552 COMPARISON_OP(gt, >);
1553 COMPARISON_OP(le, <=);
1554 COMPARISON_OP(ge, >=);
1555 COMPARISON_OP2(eq, ==); /* include ref comparison */
1556 COMPARISON_OP2(ne, !=); /* include ref comparison */
1557 NULL_COMPARISON_OP(null);
1558 NULL_COMPARISON_NOT_OP(nonnull);
1559
1560 /* Goto pc at specified offset in switch table. */
1561
1562 CASE(_tableswitch): {
1563 jint* lpc = (jint*)VMalignWordUp(pc+1);
1564 int32_t key = STACK_INT(-1);
1565 int32_t low = Bytes::get_Java_u4((address)&lpc[1]);
1566 int32_t high = Bytes::get_Java_u4((address)&lpc[2]);
1567 int32_t skip;
1568 key -= low;
1569 if (((uint32_t) key > (uint32_t)(high - low))) {
1570 key = -1;
1571 skip = Bytes::get_Java_u4((address)&lpc[0]);
1572 } else {
1573 skip = Bytes::get_Java_u4((address)&lpc[key + 3]);
1574 }
1575 // Profile switch.
1576 BI_PROFILE_UPDATE_SWITCH(/*switch_index=*/key);
1577 // Does this really need a full backedge check (osr)?
1578 address branch_pc = pc;
1579 UPDATE_PC_AND_TOS(skip, -1);
1580 DO_BACKEDGE_CHECKS(skip, branch_pc);
1581 CONTINUE;
1582 }
1583
1584 /* Goto pc whose table entry matches specified key. */
1585
1586 CASE(_lookupswitch): {
1587 jint* lpc = (jint*)VMalignWordUp(pc+1);
1588 int32_t key = STACK_INT(-1);
1589 int32_t skip = Bytes::get_Java_u4((address) lpc); /* default amount */
1590 // Remember index.
1591 int index = -1;
1592 int newindex = 0;
1593 int32_t npairs = Bytes::get_Java_u4((address) &lpc[1]);
1594 while (--npairs >= 0) {
1595 lpc += 2;
1596 if (key == (int32_t)Bytes::get_Java_u4((address)lpc)) {
1597 skip = Bytes::get_Java_u4((address)&lpc[1]);
1598 index = newindex;
1599 break;
1600 }
1601 newindex += 1;
1602 }
1603 // Profile switch.
1604 BI_PROFILE_UPDATE_SWITCH(/*switch_index=*/index);
1605 address branch_pc = pc;
1606 UPDATE_PC_AND_TOS(skip, -1);
1607 DO_BACKEDGE_CHECKS(skip, branch_pc);
1608 CONTINUE;
1609 }
1610
1611 CASE(_fcmpl):
1612 CASE(_fcmpg):
1613 {
1614 SET_STACK_INT(VMfloatCompare(STACK_FLOAT(-2),
1615 STACK_FLOAT(-1),
1616 (opcode == Bytecodes::_fcmpl ? -1 : 1)),
1617 -2);
1618 UPDATE_PC_AND_TOS_AND_CONTINUE(1, -1);
1619 }
1620
1621 CASE(_dcmpl):
1622 CASE(_dcmpg):
1623 {
1624 int r = VMdoubleCompare(STACK_DOUBLE(-3),
1625 STACK_DOUBLE(-1),
1626 (opcode == Bytecodes::_dcmpl ? -1 : 1));
1627 MORE_STACK(-4); // Pop
1628 SET_STACK_INT(r, 0);
1629 UPDATE_PC_AND_TOS_AND_CONTINUE(1, 1);
1630 }
1631
1632 CASE(_lcmp):
1633 {
1634 int r = VMlongCompare(STACK_LONG(-3), STACK_LONG(-1));
1635 MORE_STACK(-4);
1636 SET_STACK_INT(r, 0);
1637 UPDATE_PC_AND_TOS_AND_CONTINUE(1, 1);
1638 }
1639
1640
1641 /* Return from a method */
1642
1643 CASE(_areturn):
1644 CASE(_ireturn):
1645 CASE(_freturn):
1646 {
1647 // Allow a safepoint before returning to frame manager.
1648 SAFEPOINT;
1649
1650 goto handle_return;
1651 }
1652
1653 CASE(_lreturn):
1654 CASE(_dreturn):
1655 {
1656 // Allow a safepoint before returning to frame manager.
1657 SAFEPOINT;
1658 goto handle_return;
1659 }
1660
1661 CASE(_return_register_finalizer): {
1662
1663 oop rcvr = LOCALS_OBJECT(0);
1664 VERIFY_OOP(rcvr);
1665 if (rcvr->klass()->has_finalizer()) {
1666 CALL_VM(InterpreterRuntime::register_finalizer(THREAD, rcvr), handle_exception);
1667 }
1668 goto handle_return;
1669 }
1670 CASE(_return): {
1671
1672 // Allow a safepoint before returning to frame manager.
1673 SAFEPOINT;
1674 goto handle_return;
1675 }
1676
1677 /* Array access byte-codes */
1678
1679 /* Every array access byte-code starts out like this */
1680 // arrayOopDesc* arrObj = (arrayOopDesc*)STACK_OBJECT(arrayOff);
1681 #define ARRAY_INTRO(arrayOff) \
1682 arrayOop arrObj = (arrayOop)STACK_OBJECT(arrayOff); \
1683 jint index = STACK_INT(arrayOff + 1); \
1684 char message[jintAsStringSize]; \
1685 CHECK_NULL(arrObj); \
1686 if ((uint32_t)index >= (uint32_t)arrObj->length()) { \
1687 sprintf(message, "%d", index); \
1688 VM_JAVA_ERROR(vmSymbols::java_lang_ArrayIndexOutOfBoundsException(), \
1689 message, note_rangeCheck_trap); \
1690 }
1691
1692 /* 32-bit loads. These handle conversion from < 32-bit types */
1693 #define ARRAY_LOADTO32(T, T2, format, stackRes, extra) \
1694 { \
1695 ARRAY_INTRO(-2); \
1696 (void)extra; \
1697 SET_ ## stackRes(*(T2 *)(((address) arrObj->base(T)) + index * sizeof(T2)), \
1698 -2); \
1699 UPDATE_PC_AND_TOS_AND_CONTINUE(1, -1); \
1700 }
1701
1702 /* 64-bit loads */
1703 #define ARRAY_LOADTO64(T,T2, stackRes, extra) \
1704 { \
1705 ARRAY_INTRO(-2); \
1706 SET_ ## stackRes(*(T2 *)(((address) arrObj->base(T)) + index * sizeof(T2)), -1); \
1707 (void)extra; \
1708 UPDATE_PC_AND_CONTINUE(1); \
1709 }
1710
1711 CASE(_iaload):
1712 ARRAY_LOADTO32(T_INT, jint, "%d", STACK_INT, 0);
1713 CASE(_faload):
1714 ARRAY_LOADTO32(T_FLOAT, jfloat, "%f", STACK_FLOAT, 0);
1715 CASE(_aaload): {
1716 ARRAY_INTRO(-2);
1717 SET_STACK_OBJECT(((objArrayOop) arrObj)->obj_at(index), -2);
1718 UPDATE_PC_AND_TOS_AND_CONTINUE(1, -1);
1719 }
1720 CASE(_baload):
1721 ARRAY_LOADTO32(T_BYTE, jbyte, "%d", STACK_INT, 0);
1722 CASE(_caload):
1723 ARRAY_LOADTO32(T_CHAR, jchar, "%d", STACK_INT, 0);
1724 CASE(_saload):
1725 ARRAY_LOADTO32(T_SHORT, jshort, "%d", STACK_INT, 0);
1726 CASE(_laload):
1727 ARRAY_LOADTO64(T_LONG, jlong, STACK_LONG, 0);
1728 CASE(_daload):
1729 ARRAY_LOADTO64(T_DOUBLE, jdouble, STACK_DOUBLE, 0);
1730
1731 /* 32-bit stores. These handle conversion to < 32-bit types */
1732 #define ARRAY_STOREFROM32(T, T2, format, stackSrc, extra) \
1733 { \
1734 ARRAY_INTRO(-3); \
1735 (void)extra; \
1736 *(T2 *)(((address) arrObj->base(T)) + index * sizeof(T2)) = stackSrc( -1); \
1737 UPDATE_PC_AND_TOS_AND_CONTINUE(1, -3); \
1738 }
1739
1740 /* 64-bit stores */
1741 #define ARRAY_STOREFROM64(T, T2, stackSrc, extra) \
1742 { \
1743 ARRAY_INTRO(-4); \
1744 (void)extra; \
1745 *(T2 *)(((address) arrObj->base(T)) + index * sizeof(T2)) = stackSrc( -1); \
1746 UPDATE_PC_AND_TOS_AND_CONTINUE(1, -4); \
1747 }
1748
1749 CASE(_iastore):
1750 ARRAY_STOREFROM32(T_INT, jint, "%d", STACK_INT, 0);
1751 CASE(_fastore):
1752 ARRAY_STOREFROM32(T_FLOAT, jfloat, "%f", STACK_FLOAT, 0);
1753 /*
1754 * This one looks different because of the assignability check
1755 */
1756 CASE(_aastore): {
1757 oop rhsObject = STACK_OBJECT(-1);
1758 VERIFY_OOP(rhsObject);
1759 ARRAY_INTRO( -3);
1760 // arrObj, index are set
1761 if (rhsObject != NULL) {
1762 /* Check assignability of rhsObject into arrObj */
1763 Klass* rhsKlass = rhsObject->klass(); // EBX (subclass)
1764 Klass* elemKlass = ObjArrayKlass::cast(arrObj->klass())->element_klass(); // superklass EAX
1765 //
1766 // Check for compatibilty. This check must not GC!!
1767 // Seems way more expensive now that we must dispatch
1768 //
1769 if (rhsKlass != elemKlass && !rhsKlass->is_subtype_of(elemKlass)) { // ebx->is...
1770 // Decrement counter if subtype check failed.
1771 BI_PROFILE_SUBTYPECHECK_FAILED(rhsKlass);
1772 VM_JAVA_ERROR(vmSymbols::java_lang_ArrayStoreException(), "", note_arrayCheck_trap);
1773 }
1774 // Profile checkcast with null_seen and receiver.
1775 BI_PROFILE_UPDATE_CHECKCAST(/*null_seen=*/false, rhsKlass);
1776 } else {
1777 // Profile checkcast with null_seen and receiver.
1778 BI_PROFILE_UPDATE_CHECKCAST(/*null_seen=*/true, NULL);
1779 }
1780 ((objArrayOop) arrObj)->obj_at_put(index, rhsObject);
1781 UPDATE_PC_AND_TOS_AND_CONTINUE(1, -3);
1782 }
1783 CASE(_bastore): {
1784 ARRAY_INTRO(-3);
1785 int item = STACK_INT(-1);
1786 // if it is a T_BOOLEAN array, mask the stored value to 0/1
1787 if (arrObj->klass() == Universe::boolArrayKlassObj()) {
1788 item &= 1;
1789 } else {
1790 assert(arrObj->klass() == Universe::byteArrayKlassObj(),
1791 "should be byte array otherwise");
1792 }
1793 ((typeArrayOop)arrObj)->byte_at_put(index, item);
1794 UPDATE_PC_AND_TOS_AND_CONTINUE(1, -3);
1795 }
1796 CASE(_castore):
1797 ARRAY_STOREFROM32(T_CHAR, jchar, "%d", STACK_INT, 0);
1798 CASE(_sastore):
1799 ARRAY_STOREFROM32(T_SHORT, jshort, "%d", STACK_INT, 0);
1800 CASE(_lastore):
1801 ARRAY_STOREFROM64(T_LONG, jlong, STACK_LONG, 0);
1802 CASE(_dastore):
1803 ARRAY_STOREFROM64(T_DOUBLE, jdouble, STACK_DOUBLE, 0);
1804
1805 CASE(_arraylength):
1806 {
1807 arrayOop ary = (arrayOop) STACK_OBJECT(-1);
1808 CHECK_NULL(ary);
1809 SET_STACK_INT(ary->length(), -1);
1810 UPDATE_PC_AND_CONTINUE(1);
1811 }
1812
1813 /* monitorenter and monitorexit for locking/unlocking an object */
1814
1815 CASE(_monitorenter): {
1816 oop lockee = STACK_OBJECT(-1);
1817 // derefing's lockee ought to provoke implicit null check
1818 CHECK_NULL(lockee);
1819 // find a free monitor or one already allocated for this object
1820 // if we find a matching object then we need a new monitor
1821 // since this is recursive enter
1822 BasicObjectLock* limit = istate->monitor_base();
1823 BasicObjectLock* most_recent = (BasicObjectLock*) istate->stack_base();
1824 BasicObjectLock* entry = NULL;
1825 while (most_recent != limit ) {
1826 if (most_recent->obj() == NULL) entry = most_recent;
1827 else if (most_recent->obj() == lockee) break;
1828 most_recent++;
1829 }
1830 if (entry != NULL) {
1831 entry->set_obj(lockee);
1832 int success = false;
1833 uintptr_t epoch_mask_in_place = (uintptr_t)markOopDesc::epoch_mask_in_place;
1834
1835 markOop mark = lockee->mark();
1836 intptr_t hash = (intptr_t) markOopDesc::no_hash;
1837 // implies UseBiasedLocking
1838 if (mark->has_bias_pattern()) {
1839 uintptr_t thread_ident;
1840 uintptr_t anticipated_bias_locking_value;
1841 thread_ident = (uintptr_t)istate->thread();
1842 anticipated_bias_locking_value =
1843 (((uintptr_t)lockee->klass()->prototype_header() | thread_ident) ^ (uintptr_t)mark) &
1844 ~((uintptr_t) markOopDesc::age_mask_in_place);
1845
1846 if (anticipated_bias_locking_value == 0) {
1847 // already biased towards this thread, nothing to do
1848 if (PrintBiasedLockingStatistics) {
1849 (* BiasedLocking::biased_lock_entry_count_addr())++;
1850 }
1851 success = true;
1852 }
1853 else if ((anticipated_bias_locking_value & markOopDesc::biased_lock_mask_in_place) != 0) {
1854 // try revoke bias
1855 markOop header = lockee->klass()->prototype_header();
1856 if (hash != markOopDesc::no_hash) {
1857 header = header->copy_set_hash(hash);
1858 }
1859 if (Atomic::cmpxchg_ptr(header, lockee->mark_addr(), mark) == mark) {
1860 if (PrintBiasedLockingStatistics)
1861 (*BiasedLocking::revoked_lock_entry_count_addr())++;
1862 }
1863 }
1864 else if ((anticipated_bias_locking_value & epoch_mask_in_place) !=0) {
1865 // try rebias
1866 markOop new_header = (markOop) ( (intptr_t) lockee->klass()->prototype_header() | thread_ident);
1867 if (hash != markOopDesc::no_hash) {
1868 new_header = new_header->copy_set_hash(hash);
1869 }
1870 if (Atomic::cmpxchg_ptr((void*)new_header, lockee->mark_addr(), mark) == mark) {
1871 if (PrintBiasedLockingStatistics)
1872 (* BiasedLocking::rebiased_lock_entry_count_addr())++;
1873 }
1874 else {
1875 CALL_VM(InterpreterRuntime::monitorenter(THREAD, entry), handle_exception);
1876 }
1877 success = true;
1878 }
1879 else {
1880 // try to bias towards thread in case object is anonymously biased
1881 markOop header = (markOop) ((uintptr_t) mark & ((uintptr_t)markOopDesc::biased_lock_mask_in_place |
1882 (uintptr_t)markOopDesc::age_mask_in_place |
1883 epoch_mask_in_place));
1884 if (hash != markOopDesc::no_hash) {
1885 header = header->copy_set_hash(hash);
1886 }
1887 markOop new_header = (markOop) ((uintptr_t) header | thread_ident);
1888 // debugging hint
1889 DEBUG_ONLY(entry->lock()->set_displaced_header((markOop) (uintptr_t) 0xdeaddead);)
1890 if (Atomic::cmpxchg_ptr((void*)new_header, lockee->mark_addr(), header) == header) {
1891 if (PrintBiasedLockingStatistics)
1892 (* BiasedLocking::anonymously_biased_lock_entry_count_addr())++;
1893 }
1894 else {
1895 CALL_VM(InterpreterRuntime::monitorenter(THREAD, entry), handle_exception);
1896 }
1897 success = true;
1898 }
1899 }
1900
1901 // traditional lightweight locking
1902 if (!success) {
1903 markOop displaced = lockee->mark()->set_unlocked();
1904 entry->lock()->set_displaced_header(displaced);
1905 bool call_vm = UseHeavyMonitors;
1906 if (call_vm || Atomic::cmpxchg_ptr(entry, lockee->mark_addr(), displaced) != displaced) {
1907 // Is it simple recursive case?
1908 if (!call_vm && THREAD->is_lock_owned((address) displaced->clear_lock_bits())) {
1909 entry->lock()->set_displaced_header(NULL);
1910 } else {
1911 CALL_VM(InterpreterRuntime::monitorenter(THREAD, entry), handle_exception);
1912 }
1913 }
1914 }
1915 UPDATE_PC_AND_TOS_AND_CONTINUE(1, -1);
1916 } else {
1917 istate->set_msg(more_monitors);
1918 UPDATE_PC_AND_RETURN(0); // Re-execute
1919 }
1920 }
1921
1922 CASE(_monitorexit): {
1923 oop lockee = STACK_OBJECT(-1);
1924 CHECK_NULL(lockee);
1925 // derefing's lockee ought to provoke implicit null check
1926 // find our monitor slot
1927 BasicObjectLock* limit = istate->monitor_base();
1928 BasicObjectLock* most_recent = (BasicObjectLock*) istate->stack_base();
1929 while (most_recent != limit ) {
1930 if ((most_recent)->obj() == lockee) {
1931 BasicLock* lock = most_recent->lock();
1932 markOop header = lock->displaced_header();
1933 most_recent->set_obj(NULL);
1934 if (!lockee->mark()->has_bias_pattern()) {
1935 bool call_vm = UseHeavyMonitors;
1936 // If it isn't recursive we either must swap old header or call the runtime
1937 if (header != NULL || call_vm) {
1938 if (call_vm || Atomic::cmpxchg_ptr(header, lockee->mark_addr(), lock) != lock) {
1939 // restore object for the slow case
1940 most_recent->set_obj(lockee);
1941 CALL_VM(InterpreterRuntime::monitorexit(THREAD, most_recent), handle_exception);
1942 }
1943 }
1944 }
1945 UPDATE_PC_AND_TOS_AND_CONTINUE(1, -1);
1946 }
1947 most_recent++;
1948 }
1949 // Need to throw illegal monitor state exception
1950 CALL_VM(InterpreterRuntime::throw_illegal_monitor_state_exception(THREAD), handle_exception);
1951 ShouldNotReachHere();
1952 }
1953
1954 /* All of the non-quick opcodes. */
1955
1956 /* -Set clobbersCpIndex true if the quickened opcode clobbers the
1957 * constant pool index in the instruction.
1958 */
1959 CASE(_getfield):
1960 CASE(_getstatic):
1961 {
1962 u2 index;
1963 ConstantPoolCacheEntry* cache;
1964 index = Bytes::get_native_u2(pc+1);
1965
1966 // QQQ Need to make this as inlined as possible. Probably need to
1967 // split all the bytecode cases out so c++ compiler has a chance
1968 // for constant prop to fold everything possible away.
1969
1970 cache = cp->entry_at(index);
1971 if (!cache->is_resolved((Bytecodes::Code)opcode)) {
1972 CALL_VM(InterpreterRuntime::resolve_get_put(THREAD, (Bytecodes::Code)opcode),
1973 handle_exception);
1974 cache = cp->entry_at(index);
1975 }
1976
1977 #ifdef VM_JVMTI
1978 if (_jvmti_interp_events) {
1979 int *count_addr;
1980 oop obj;
1981 // Check to see if a field modification watch has been set
1982 // before we take the time to call into the VM.
1983 count_addr = (int *)JvmtiExport::get_field_access_count_addr();
1984 if ( *count_addr > 0 ) {
1985 if ((Bytecodes::Code)opcode == Bytecodes::_getstatic) {
1986 obj = (oop)NULL;
1987 } else {
1988 obj = (oop) STACK_OBJECT(-1);
1989 VERIFY_OOP(obj);
1990 }
1991 CALL_VM(InterpreterRuntime::post_field_access(THREAD,
1992 obj,
1993 cache),
1994 handle_exception);
1995 }
1996 }
1997 #endif /* VM_JVMTI */
1998
1999 oop obj;
2000 if ((Bytecodes::Code)opcode == Bytecodes::_getstatic) {
2001 Klass* k = cache->f1_as_klass();
2002 obj = k->java_mirror();
2003 MORE_STACK(1); // Assume single slot push
2004 } else {
2005 obj = (oop) STACK_OBJECT(-1);
2006 CHECK_NULL(obj);
2007 }
2008
2009 //
2010 // Now store the result on the stack
2011 //
2012 TosState tos_type = cache->flag_state();
2013 int field_offset = cache->f2_as_index();
2014 if (cache->is_volatile()) {
2015 if (support_IRIW_for_not_multiple_copy_atomic_cpu) {
2016 OrderAccess::fence();
2017 }
2018 if (tos_type == atos) {
2019 VERIFY_OOP(obj->obj_field_acquire(field_offset));
2020 SET_STACK_OBJECT(obj->obj_field_acquire(field_offset), -1);
2021 } else if (tos_type == itos) {
2022 SET_STACK_INT(obj->int_field_acquire(field_offset), -1);
2023 } else if (tos_type == ltos) {
2024 SET_STACK_LONG(obj->long_field_acquire(field_offset), 0);
2025 MORE_STACK(1);
2026 } else if (tos_type == btos || tos_type == ztos) {
2027 SET_STACK_INT(obj->byte_field_acquire(field_offset), -1);
2028 } else if (tos_type == ctos) {
2029 SET_STACK_INT(obj->char_field_acquire(field_offset), -1);
2030 } else if (tos_type == stos) {
2031 SET_STACK_INT(obj->short_field_acquire(field_offset), -1);
2032 } else if (tos_type == ftos) {
2033 SET_STACK_FLOAT(obj->float_field_acquire(field_offset), -1);
2034 } else {
2035 SET_STACK_DOUBLE(obj->double_field_acquire(field_offset), 0);
2036 MORE_STACK(1);
2037 }
2038 } else {
2039 if (tos_type == atos) {
2040 VERIFY_OOP(obj->obj_field(field_offset));
2041 SET_STACK_OBJECT(obj->obj_field(field_offset), -1);
2042 } else if (tos_type == itos) {
2043 SET_STACK_INT(obj->int_field(field_offset), -1);
2044 } else if (tos_type == ltos) {
2045 SET_STACK_LONG(obj->long_field(field_offset), 0);
2046 MORE_STACK(1);
2047 } else if (tos_type == btos || tos_type == ztos) {
2048 SET_STACK_INT(obj->byte_field(field_offset), -1);
2049 } else if (tos_type == ctos) {
2050 SET_STACK_INT(obj->char_field(field_offset), -1);
2051 } else if (tos_type == stos) {
2052 SET_STACK_INT(obj->short_field(field_offset), -1);
2053 } else if (tos_type == ftos) {
2054 SET_STACK_FLOAT(obj->float_field(field_offset), -1);
2055 } else {
2056 SET_STACK_DOUBLE(obj->double_field(field_offset), 0);
2057 MORE_STACK(1);
2058 }
2059 }
2060
2061 UPDATE_PC_AND_CONTINUE(3);
2062 }
2063
2064 CASE(_putfield):
2065 CASE(_putstatic):
2066 {
2067 u2 index = Bytes::get_native_u2(pc+1);
2068 ConstantPoolCacheEntry* cache = cp->entry_at(index);
2069 if (!cache->is_resolved((Bytecodes::Code)opcode)) {
2070 CALL_VM(InterpreterRuntime::resolve_get_put(THREAD, (Bytecodes::Code)opcode),
2071 handle_exception);
2072 cache = cp->entry_at(index);
2073 }
2074
2075 #ifdef VM_JVMTI
2076 if (_jvmti_interp_events) {
2077 int *count_addr;
2078 oop obj;
2079 // Check to see if a field modification watch has been set
2080 // before we take the time to call into the VM.
2081 count_addr = (int *)JvmtiExport::get_field_modification_count_addr();
2082 if ( *count_addr > 0 ) {
2083 if ((Bytecodes::Code)opcode == Bytecodes::_putstatic) {
2084 obj = (oop)NULL;
2085 }
2086 else {
2087 if (cache->is_long() || cache->is_double()) {
2088 obj = (oop) STACK_OBJECT(-3);
2089 } else {
2090 obj = (oop) STACK_OBJECT(-2);
2091 }
2092 VERIFY_OOP(obj);
2093 }
2094
2095 CALL_VM(InterpreterRuntime::post_field_modification(THREAD,
2096 obj,
2097 cache,
2098 (jvalue *)STACK_SLOT(-1)),
2099 handle_exception);
2100 }
2101 }
2102 #endif /* VM_JVMTI */
2103
2104 // QQQ Need to make this as inlined as possible. Probably need to split all the bytecode cases
2105 // out so c++ compiler has a chance for constant prop to fold everything possible away.
2106
2107 oop obj;
2108 int count;
2109 TosState tos_type = cache->flag_state();
2110
2111 count = -1;
2112 if (tos_type == ltos || tos_type == dtos) {
2113 --count;
2114 }
2115 if ((Bytecodes::Code)opcode == Bytecodes::_putstatic) {
2116 Klass* k = cache->f1_as_klass();
2117 obj = k->java_mirror();
2118 } else {
2119 --count;
2120 obj = (oop) STACK_OBJECT(count);
2121 CHECK_NULL(obj);
2122 }
2123
2124 //
2125 // Now store the result
2126 //
2127 int field_offset = cache->f2_as_index();
2128 if (cache->is_volatile()) {
2129 if (tos_type == itos) {
2130 obj->release_int_field_put(field_offset, STACK_INT(-1));
2131 } else if (tos_type == atos) {
2132 VERIFY_OOP(STACK_OBJECT(-1));
2133 obj->release_obj_field_put(field_offset, STACK_OBJECT(-1));
2134 } else if (tos_type == btos) {
2135 obj->release_byte_field_put(field_offset, STACK_INT(-1));
2136 } else if (tos_type == ztos) {
2137 int bool_field = STACK_INT(-1); // only store LSB
2138 obj->release_byte_field_put(field_offset, (bool_field & 1));
2139 } else if (tos_type == ltos) {
2140 obj->release_long_field_put(field_offset, STACK_LONG(-1));
2141 } else if (tos_type == ctos) {
2142 obj->release_char_field_put(field_offset, STACK_INT(-1));
2143 } else if (tos_type == stos) {
2144 obj->release_short_field_put(field_offset, STACK_INT(-1));
2145 } else if (tos_type == ftos) {
2146 obj->release_float_field_put(field_offset, STACK_FLOAT(-1));
2147 } else {
2148 obj->release_double_field_put(field_offset, STACK_DOUBLE(-1));
2149 }
2150 OrderAccess::storeload();
2151 } else {
2152 if (tos_type == itos) {
2153 obj->int_field_put(field_offset, STACK_INT(-1));
2154 } else if (tos_type == atos) {
2155 VERIFY_OOP(STACK_OBJECT(-1));
2156 obj->obj_field_put(field_offset, STACK_OBJECT(-1));
2157 } else if (tos_type == btos) {
2158 obj->byte_field_put(field_offset, STACK_INT(-1));
2159 } else if (tos_type == ztos) {
2160 int bool_field = STACK_INT(-1); // only store LSB
2161 obj->byte_field_put(field_offset, (bool_field & 1));
2162 } else if (tos_type == ltos) {
2163 obj->long_field_put(field_offset, STACK_LONG(-1));
2164 } else if (tos_type == ctos) {
2165 obj->char_field_put(field_offset, STACK_INT(-1));
2166 } else if (tos_type == stos) {
2167 obj->short_field_put(field_offset, STACK_INT(-1));
2168 } else if (tos_type == ftos) {
2169 obj->float_field_put(field_offset, STACK_FLOAT(-1));
2170 } else {
2171 obj->double_field_put(field_offset, STACK_DOUBLE(-1));
2172 }
2173 }
2174
2175 UPDATE_PC_AND_TOS_AND_CONTINUE(3, count);
2176 }
2177
2178 CASE(_new): {
2179 u2 index = Bytes::get_Java_u2(pc+1);
2180 ConstantPool* constants = istate->method()->constants();
2181 if (!constants->tag_at(index).is_unresolved_klass()) {
2182 // Make sure klass is initialized and doesn't have a finalizer
2183 Klass* entry = constants->slot_at(index).get_klass();
2184 assert(entry->is_klass(), "Should be resolved klass");
2185 Klass* k_entry = (Klass*) entry;
2186 assert(k_entry->oop_is_instance(), "Should be InstanceKlass");
2187 InstanceKlass* ik = (InstanceKlass*) k_entry;
2188 if ( ik->is_initialized() && ik->can_be_fastpath_allocated() ) {
2189 size_t obj_size = ik->size_helper();
2190 oop result = NULL;
2191 // If the TLAB isn't pre-zeroed then we'll have to do it
2192 bool need_zero = !ZeroTLAB;
2193 if (UseTLAB) {
2194 result = (oop) THREAD->tlab().allocate(obj_size);
2195 }
2196 // Disable non-TLAB-based fast-path, because profiling requires that all
2197 // allocations go through InterpreterRuntime::_new() if THREAD->tlab().allocate
2198 // returns NULL.
2199 #ifndef CC_INTERP_PROFILE
2200 if (result == NULL) {
2201 need_zero = true;
2202 // Try allocate in shared eden
2203 retry:
2204 HeapWord* compare_to = *Universe::heap()->top_addr();
2205 HeapWord* new_top = compare_to + obj_size;
2206 if (new_top <= *Universe::heap()->end_addr()) {
2207 if (Atomic::cmpxchg_ptr(new_top, Universe::heap()->top_addr(), compare_to) != compare_to) {
2208 goto retry;
2209 }
2210 result = (oop) compare_to;
2211 }
2212 }
2213 #endif
2214 if (result != NULL) {
2215 // Initialize object (if nonzero size and need) and then the header
2216 if (need_zero ) {
2217 HeapWord* to_zero = (HeapWord*) result + sizeof(oopDesc) / oopSize;
2218 obj_size -= sizeof(oopDesc) / oopSize;
2219 if (obj_size > 0 ) {
2220 memset(to_zero, 0, obj_size * HeapWordSize);
2221 }
2222 }
2223 if (UseBiasedLocking) {
2224 result->set_mark(ik->prototype_header());
2225 } else {
2226 result->set_mark(markOopDesc::prototype());
2227 }
2228 result->set_klass_gap(0);
2229 result->set_klass(k_entry);
2230 // Must prevent reordering of stores for object initialization
2231 // with stores that publish the new object.
2232 OrderAccess::storestore();
2233 SET_STACK_OBJECT(result, 0);
2234 UPDATE_PC_AND_TOS_AND_CONTINUE(3, 1);
2235 }
2236 }
2237 }
2238 // Slow case allocation
2239 CALL_VM(InterpreterRuntime::_new(THREAD, METHOD->constants(), index),
2240 handle_exception);
2241 // Must prevent reordering of stores for object initialization
2242 // with stores that publish the new object.
2243 OrderAccess::storestore();
2244 SET_STACK_OBJECT(THREAD->vm_result(), 0);
2245 THREAD->set_vm_result(NULL);
2246 UPDATE_PC_AND_TOS_AND_CONTINUE(3, 1);
2247 }
2248 CASE(_anewarray): {
2249 u2 index = Bytes::get_Java_u2(pc+1);
2250 jint size = STACK_INT(-1);
2251 CALL_VM(InterpreterRuntime::anewarray(THREAD, METHOD->constants(), index, size),
2252 handle_exception);
2253 // Must prevent reordering of stores for object initialization
2254 // with stores that publish the new object.
2255 OrderAccess::storestore();
2256 SET_STACK_OBJECT(THREAD->vm_result(), -1);
2257 THREAD->set_vm_result(NULL);
2258 UPDATE_PC_AND_CONTINUE(3);
2259 }
2260 CASE(_multianewarray): {
2261 jint dims = *(pc+3);
2262 jint size = STACK_INT(-1);
2263 // stack grows down, dimensions are up!
2264 jint *dimarray =
2265 (jint*)&topOfStack[dims * Interpreter::stackElementWords+
2266 Interpreter::stackElementWords-1];
2267 //adjust pointer to start of stack element
2268 CALL_VM(InterpreterRuntime::multianewarray(THREAD, dimarray),
2269 handle_exception);
2270 // Must prevent reordering of stores for object initialization
2271 // with stores that publish the new object.
2272 OrderAccess::storestore();
2273 SET_STACK_OBJECT(THREAD->vm_result(), -dims);
2274 THREAD->set_vm_result(NULL);
2275 UPDATE_PC_AND_TOS_AND_CONTINUE(4, -(dims-1));
2276 }
2277 CASE(_checkcast):
2278 if (STACK_OBJECT(-1) != NULL) {
2279 VERIFY_OOP(STACK_OBJECT(-1));
2280 u2 index = Bytes::get_Java_u2(pc+1);
2281 // Constant pool may have actual klass or unresolved klass. If it is
2282 // unresolved we must resolve it.
2283 if (METHOD->constants()->tag_at(index).is_unresolved_klass()) {
2284 CALL_VM(InterpreterRuntime::quicken_io_cc(THREAD), handle_exception);
2285 }
2286 Klass* klassOf = (Klass*) METHOD->constants()->slot_at(index).get_klass();
2287 Klass* objKlass = STACK_OBJECT(-1)->klass(); // ebx
2288 //
2289 // Check for compatibilty. This check must not GC!!
2290 // Seems way more expensive now that we must dispatch.
2291 //
2292 if (objKlass != klassOf && !objKlass->is_subtype_of(klassOf)) {
2293 // Decrement counter at checkcast.
2294 BI_PROFILE_SUBTYPECHECK_FAILED(objKlass);
2295 ResourceMark rm(THREAD);
2296 const char* objName = objKlass->external_name();
2297 const char* klassName = klassOf->external_name();
2298 char* message = SharedRuntime::generate_class_cast_message(
2299 objName, klassName);
2300 VM_JAVA_ERROR(vmSymbols::java_lang_ClassCastException(), message, note_classCheck_trap);
2301 }
2302 // Profile checkcast with null_seen and receiver.
2303 BI_PROFILE_UPDATE_CHECKCAST(/*null_seen=*/false, objKlass);
2304 } else {
2305 // Profile checkcast with null_seen and receiver.
2306 BI_PROFILE_UPDATE_CHECKCAST(/*null_seen=*/true, NULL);
2307 }
2308 UPDATE_PC_AND_CONTINUE(3);
2309
2310 CASE(_instanceof):
2311 if (STACK_OBJECT(-1) == NULL) {
2312 SET_STACK_INT(0, -1);
2313 // Profile instanceof with null_seen and receiver.
2314 BI_PROFILE_UPDATE_INSTANCEOF(/*null_seen=*/true, NULL);
2315 } else {
2316 VERIFY_OOP(STACK_OBJECT(-1));
2317 u2 index = Bytes::get_Java_u2(pc+1);
2318 // Constant pool may have actual klass or unresolved klass. If it is
2319 // unresolved we must resolve it.
2320 if (METHOD->constants()->tag_at(index).is_unresolved_klass()) {
2321 CALL_VM(InterpreterRuntime::quicken_io_cc(THREAD), handle_exception);
2322 }
2323 Klass* klassOf = (Klass*) METHOD->constants()->slot_at(index).get_klass();
2324 Klass* objKlass = STACK_OBJECT(-1)->klass();
2325 //
2326 // Check for compatibilty. This check must not GC!!
2327 // Seems way more expensive now that we must dispatch.
2328 //
2329 if ( objKlass == klassOf || objKlass->is_subtype_of(klassOf)) {
2330 SET_STACK_INT(1, -1);
2331 } else {
2332 SET_STACK_INT(0, -1);
2333 // Decrement counter at checkcast.
2334 BI_PROFILE_SUBTYPECHECK_FAILED(objKlass);
2335 }
2336 // Profile instanceof with null_seen and receiver.
2337 BI_PROFILE_UPDATE_INSTANCEOF(/*null_seen=*/false, objKlass);
2338 }
2339 UPDATE_PC_AND_CONTINUE(3);
2340
2341 CASE(_ldc_w):
2342 CASE(_ldc):
2343 {
2344 u2 index;
2345 bool wide = false;
2346 int incr = 2; // frequent case
2347 if (opcode == Bytecodes::_ldc) {
2348 index = pc[1];
2349 } else {
2350 index = Bytes::get_Java_u2(pc+1);
2351 incr = 3;
2352 wide = true;
2353 }
2354
2355 ConstantPool* constants = METHOD->constants();
2356 switch (constants->tag_at(index).value()) {
2357 case JVM_CONSTANT_Integer:
2358 SET_STACK_INT(constants->int_at(index), 0);
2359 break;
2360
2361 case JVM_CONSTANT_Float:
2362 SET_STACK_FLOAT(constants->float_at(index), 0);
2363 break;
2364
2365 case JVM_CONSTANT_String:
2366 {
2367 oop result = constants->resolved_references()->obj_at(index);
2368 if (result == NULL) {
2369 CALL_VM(InterpreterRuntime::resolve_ldc(THREAD, (Bytecodes::Code) opcode), handle_exception);
2370 SET_STACK_OBJECT(THREAD->vm_result(), 0);
2371 THREAD->set_vm_result(NULL);
2372 } else {
2373 VERIFY_OOP(result);
2374 SET_STACK_OBJECT(result, 0);
2375 }
2376 break;
2377 }
2378
2379 case JVM_CONSTANT_Class:
2380 VERIFY_OOP(constants->resolved_klass_at(index)->java_mirror());
2381 SET_STACK_OBJECT(constants->resolved_klass_at(index)->java_mirror(), 0);
2382 break;
2383
2384 case JVM_CONSTANT_UnresolvedClass:
2385 case JVM_CONSTANT_UnresolvedClassInError:
2386 CALL_VM(InterpreterRuntime::ldc(THREAD, wide), handle_exception);
2387 SET_STACK_OBJECT(THREAD->vm_result(), 0);
2388 THREAD->set_vm_result(NULL);
2389 break;
2390
2391 default: ShouldNotReachHere();
2392 }
2393 UPDATE_PC_AND_TOS_AND_CONTINUE(incr, 1);
2394 }
2395
2396 CASE(_ldc2_w):
2397 {
2398 u2 index = Bytes::get_Java_u2(pc+1);
2399
2400 ConstantPool* constants = METHOD->constants();
2401 switch (constants->tag_at(index).value()) {
2402
2403 case JVM_CONSTANT_Long:
2404 SET_STACK_LONG(constants->long_at(index), 1);
2405 break;
2406
2407 case JVM_CONSTANT_Double:
2408 SET_STACK_DOUBLE(constants->double_at(index), 1);
2409 break;
2410 default: ShouldNotReachHere();
2411 }
2412 UPDATE_PC_AND_TOS_AND_CONTINUE(3, 2);
2413 }
2414
2415 CASE(_fast_aldc_w):
2416 CASE(_fast_aldc): {
2417 u2 index;
2418 int incr;
2419 if (opcode == Bytecodes::_fast_aldc) {
2420 index = pc[1];
2421 incr = 2;
2422 } else {
2423 index = Bytes::get_native_u2(pc+1);
2424 incr = 3;
2425 }
2426
2427 // We are resolved if the f1 field contains a non-null object (CallSite, etc.)
2428 // This kind of CP cache entry does not need to match the flags byte, because
2429 // there is a 1-1 relation between bytecode type and CP entry type.
2430 ConstantPool* constants = METHOD->constants();
2431 oop result = constants->resolved_references()->obj_at(index);
2432 if (result == NULL) {
2433 CALL_VM(InterpreterRuntime::resolve_ldc(THREAD, (Bytecodes::Code) opcode),
2434 handle_exception);
2435 result = THREAD->vm_result();
2436 }
2437
2438 VERIFY_OOP(result);
2439 SET_STACK_OBJECT(result, 0);
2440 UPDATE_PC_AND_TOS_AND_CONTINUE(incr, 1);
2441 }
2442
2443 CASE(_invokedynamic): {
2444
2445 if (!EnableInvokeDynamic) {
2446 // We should not encounter this bytecode if !EnableInvokeDynamic.
2447 // The verifier will stop it. However, if we get past the verifier,
2448 // this will stop the thread in a reasonable way, without crashing the JVM.
2449 CALL_VM(InterpreterRuntime::throw_IncompatibleClassChangeError(THREAD),
2450 handle_exception);
2451 ShouldNotReachHere();
2452 }
2453
2454 u4 index = Bytes::get_native_u4(pc+1);
2455 ConstantPoolCacheEntry* cache = cp->constant_pool()->invokedynamic_cp_cache_entry_at(index);
2456
2457 // We are resolved if the resolved_references field contains a non-null object (CallSite, etc.)
2458 // This kind of CP cache entry does not need to match the flags byte, because
2459 // there is a 1-1 relation between bytecode type and CP entry type.
2460 if (! cache->is_resolved((Bytecodes::Code) opcode)) {
2461 CALL_VM(InterpreterRuntime::resolve_invokedynamic(THREAD),
2462 handle_exception);
2463 cache = cp->constant_pool()->invokedynamic_cp_cache_entry_at(index);
2464 }
2465
2466 Method* method = cache->f1_as_method();
2467 if (VerifyOops) method->verify();
2468
2469 if (cache->has_appendix()) {
2470 ConstantPool* constants = METHOD->constants();
2471 SET_STACK_OBJECT(cache->appendix_if_resolved(constants), 0);
2472 MORE_STACK(1);
2473 }
2474
2475 istate->set_msg(call_method);
2476 istate->set_callee(method);
2477 istate->set_callee_entry_point(method->from_interpreted_entry());
2478 istate->set_bcp_advance(5);
2479
2480 // Invokedynamic has got a call counter, just like an invokestatic -> increment!
2481 BI_PROFILE_UPDATE_CALL();
2482
2483 UPDATE_PC_AND_RETURN(0); // I'll be back...
2484 }
2485
2486 CASE(_invokehandle): {
2487
2488 if (!EnableInvokeDynamic) {
2489 ShouldNotReachHere();
2490 }
2491
2492 u2 index = Bytes::get_native_u2(pc+1);
2493 ConstantPoolCacheEntry* cache = cp->entry_at(index);
2494
2495 if (! cache->is_resolved((Bytecodes::Code) opcode)) {
2496 CALL_VM(InterpreterRuntime::resolve_invokehandle(THREAD),
2497 handle_exception);
2498 cache = cp->entry_at(index);
2499 }
2500
2501 Method* method = cache->f1_as_method();
2502 if (VerifyOops) method->verify();
2503
2504 if (cache->has_appendix()) {
2505 ConstantPool* constants = METHOD->constants();
2506 SET_STACK_OBJECT(cache->appendix_if_resolved(constants), 0);
2507 MORE_STACK(1);
2508 }
2509
2510 istate->set_msg(call_method);
2511 istate->set_callee(method);
2512 istate->set_callee_entry_point(method->from_interpreted_entry());
2513 istate->set_bcp_advance(3);
2514
2515 // Invokehandle has got a call counter, just like a final call -> increment!
2516 BI_PROFILE_UPDATE_FINALCALL();
2517
2518 UPDATE_PC_AND_RETURN(0); // I'll be back...
2519 }
2520
2521 CASE(_invokeinterface): {
2522 u2 index = Bytes::get_native_u2(pc+1);
2523
2524 // QQQ Need to make this as inlined as possible. Probably need to split all the bytecode cases
2525 // out so c++ compiler has a chance for constant prop to fold everything possible away.
2526
2527 ConstantPoolCacheEntry* cache = cp->entry_at(index);
2528 if (!cache->is_resolved((Bytecodes::Code)opcode)) {
2529 CALL_VM(InterpreterRuntime::resolve_invoke(THREAD, (Bytecodes::Code)opcode),
2530 handle_exception);
2531 cache = cp->entry_at(index);
2532 }
2533
2534 istate->set_msg(call_method);
2535
2536 // Special case of invokeinterface called for virtual method of
2537 // java.lang.Object. See cpCacheOop.cpp for details.
2538 // This code isn't produced by javac, but could be produced by
2539 // another compliant java compiler.
2540 if (cache->is_forced_virtual()) {
2541 Method* callee;
2542 CHECK_NULL(STACK_OBJECT(-(cache->parameter_size())));
2543 if (cache->is_vfinal()) {
2544 callee = cache->f2_as_vfinal_method();
2545 // Profile 'special case of invokeinterface' final call.
2546 BI_PROFILE_UPDATE_FINALCALL();
2547 } else {
2548 // Get receiver.
2549 int parms = cache->parameter_size();
2550 // Same comments as invokevirtual apply here.
2551 oop rcvr = STACK_OBJECT(-parms);
2552 VERIFY_OOP(rcvr);
2553 InstanceKlass* rcvrKlass = (InstanceKlass*)rcvr->klass();
2554 callee = (Method*) rcvrKlass->start_of_vtable()[ cache->f2_as_index()];
2555 // Profile 'special case of invokeinterface' virtual call.
2556 BI_PROFILE_UPDATE_VIRTUALCALL(rcvr->klass());
2557 }
2558 istate->set_callee(callee);
2559 istate->set_callee_entry_point(callee->from_interpreted_entry());
2560 #ifdef VM_JVMTI
2561 if (JvmtiExport::can_post_interpreter_events() && THREAD->is_interp_only_mode()) {
2562 istate->set_callee_entry_point(callee->interpreter_entry());
2563 }
2564 #endif /* VM_JVMTI */
2565 istate->set_bcp_advance(5);
2566 UPDATE_PC_AND_RETURN(0); // I'll be back...
2567 }
2568
2569 // this could definitely be cleaned up QQQ
2570 Method* callee;
2571 Klass* iclass = cache->f1_as_klass();
2572 // InstanceKlass* interface = (InstanceKlass*) iclass;
2573 // get receiver
2574 int parms = cache->parameter_size();
2575 oop rcvr = STACK_OBJECT(-parms);
2576 CHECK_NULL(rcvr);
2577 InstanceKlass* int2 = (InstanceKlass*) rcvr->klass();
2578 itableOffsetEntry* ki = (itableOffsetEntry*) int2->start_of_itable();
2579 int i;
2580 for ( i = 0 ; i < int2->itable_length() ; i++, ki++ ) {
2581 if (ki->interface_klass() == iclass) break;
2582 }
2583 // If the interface isn't found, this class doesn't implement this
2584 // interface. The link resolver checks this but only for the first
2585 // time this interface is called.
2586 if (i == int2->itable_length()) {
2587 VM_JAVA_ERROR(vmSymbols::java_lang_IncompatibleClassChangeError(), "", note_no_trap);
2588 }
2589 int mindex = cache->f2_as_index();
2590 itableMethodEntry* im = ki->first_method_entry(rcvr->klass());
2591 callee = im[mindex].method();
2592 if (callee == NULL) {
2593 VM_JAVA_ERROR(vmSymbols::java_lang_AbstractMethodError(), "", note_no_trap);
2594 }
2595
2596 // Profile virtual call.
2597 BI_PROFILE_UPDATE_VIRTUALCALL(rcvr->klass());
2598
2599 istate->set_callee(callee);
2600 istate->set_callee_entry_point(callee->from_interpreted_entry());
2601 #ifdef VM_JVMTI
2602 if (JvmtiExport::can_post_interpreter_events() && THREAD->is_interp_only_mode()) {
2603 istate->set_callee_entry_point(callee->interpreter_entry());
2604 }
2605 #endif /* VM_JVMTI */
2606 istate->set_bcp_advance(5);
2607 UPDATE_PC_AND_RETURN(0); // I'll be back...
2608 }
2609
2610 CASE(_invokevirtual):
2611 CASE(_invokespecial):
2612 CASE(_invokestatic): {
2613 u2 index = Bytes::get_native_u2(pc+1);
2614
2615 ConstantPoolCacheEntry* cache = cp->entry_at(index);
2616 // QQQ Need to make this as inlined as possible. Probably need to split all the bytecode cases
2617 // out so c++ compiler has a chance for constant prop to fold everything possible away.
2618
2619 if (!cache->is_resolved((Bytecodes::Code)opcode)) {
2620 CALL_VM(InterpreterRuntime::resolve_invoke(THREAD, (Bytecodes::Code)opcode),
2621 handle_exception);
2622 cache = cp->entry_at(index);
2623 }
2624
2625 istate->set_msg(call_method);
2626 {
2627 Method* callee;
2628 if ((Bytecodes::Code)opcode == Bytecodes::_invokevirtual) {
2629 CHECK_NULL(STACK_OBJECT(-(cache->parameter_size())));
2630 if (cache->is_vfinal()) {
2631 callee = cache->f2_as_vfinal_method();
2632 // Profile final call.
2633 BI_PROFILE_UPDATE_FINALCALL();
2634 } else {
2635 // get receiver
2636 int parms = cache->parameter_size();
2637 // this works but needs a resourcemark and seems to create a vtable on every call:
2638 // Method* callee = rcvr->klass()->vtable()->method_at(cache->f2_as_index());
2639 //
2640 // this fails with an assert
2641 // InstanceKlass* rcvrKlass = InstanceKlass::cast(STACK_OBJECT(-parms)->klass());
2642 // but this works
2643 oop rcvr = STACK_OBJECT(-parms);
2644 VERIFY_OOP(rcvr);
2645 InstanceKlass* rcvrKlass = (InstanceKlass*)rcvr->klass();
2646 /*
2647 Executing this code in java.lang.String:
2648 public String(char value[]) {
2649 this.count = value.length;
2650 this.value = (char[])value.clone();
2651 }
2652
2653 a find on rcvr->klass() reports:
2654 {type array char}{type array class}
2655 - klass: {other class}
2656
2657 but using InstanceKlass::cast(STACK_OBJECT(-parms)->klass()) causes in assertion failure
2658 because rcvr->klass()->oop_is_instance() == 0
2659 However it seems to have a vtable in the right location. Huh?
2660
2661 */
2662 callee = (Method*) rcvrKlass->start_of_vtable()[ cache->f2_as_index()];
2663 // Profile virtual call.
2664 BI_PROFILE_UPDATE_VIRTUALCALL(rcvr->klass());
2665 }
2666 } else {
2667 if ((Bytecodes::Code)opcode == Bytecodes::_invokespecial) {
2668 CHECK_NULL(STACK_OBJECT(-(cache->parameter_size())));
2669 }
2670 callee = cache->f1_as_method();
2671
2672 // Profile call.
2673 BI_PROFILE_UPDATE_CALL();
2674 }
2675
2676 istate->set_callee(callee);
2677 istate->set_callee_entry_point(callee->from_interpreted_entry());
2678 #ifdef VM_JVMTI
2679 if (JvmtiExport::can_post_interpreter_events() && THREAD->is_interp_only_mode()) {
2680 istate->set_callee_entry_point(callee->interpreter_entry());
2681 }
2682 #endif /* VM_JVMTI */
2683 istate->set_bcp_advance(3);
2684 UPDATE_PC_AND_RETURN(0); // I'll be back...
2685 }
2686 }
2687
2688 /* Allocate memory for a new java object. */
2689
2690 CASE(_newarray): {
2691 BasicType atype = (BasicType) *(pc+1);
2692 jint size = STACK_INT(-1);
2693 CALL_VM(InterpreterRuntime::newarray(THREAD, atype, size),
2694 handle_exception);
2695 // Must prevent reordering of stores for object initialization
2696 // with stores that publish the new object.
2697 OrderAccess::storestore();
2698 SET_STACK_OBJECT(THREAD->vm_result(), -1);
2699 THREAD->set_vm_result(NULL);
2700
2701 UPDATE_PC_AND_CONTINUE(2);
2702 }
2703
2704 /* Throw an exception. */
2705
2706 CASE(_athrow): {
2707 oop except_oop = STACK_OBJECT(-1);
2708 CHECK_NULL(except_oop);
2709 // set pending_exception so we use common code
2710 THREAD->set_pending_exception(except_oop, NULL, 0);
2711 goto handle_exception;
2712 }
2713
2714 /* goto and jsr. They are exactly the same except jsr pushes
2715 * the address of the next instruction first.
2716 */
2717
2718 CASE(_jsr): {
2719 /* push bytecode index on stack */
2720 SET_STACK_ADDR(((address)pc - (intptr_t)(istate->method()->code_base()) + 3), 0);
2721 MORE_STACK(1);
2722 /* FALL THROUGH */
2723 }
2724
2725 CASE(_goto):
2726 {
2727 int16_t offset = (int16_t)Bytes::get_Java_u2(pc + 1);
2728 // Profile jump.
2729 BI_PROFILE_UPDATE_JUMP();
2730 address branch_pc = pc;
2731 UPDATE_PC(offset);
2732 DO_BACKEDGE_CHECKS(offset, branch_pc);
2733 CONTINUE;
2734 }
2735
2736 CASE(_jsr_w): {
2737 /* push return address on the stack */
2738 SET_STACK_ADDR(((address)pc - (intptr_t)(istate->method()->code_base()) + 5), 0);
2739 MORE_STACK(1);
2740 /* FALL THROUGH */
2741 }
2742
2743 CASE(_goto_w):
2744 {
2745 int32_t offset = Bytes::get_Java_u4(pc + 1);
2746 // Profile jump.
2747 BI_PROFILE_UPDATE_JUMP();
2748 address branch_pc = pc;
2749 UPDATE_PC(offset);
2750 DO_BACKEDGE_CHECKS(offset, branch_pc);
2751 CONTINUE;
2752 }
2753
2754 /* return from a jsr or jsr_w */
2755
2756 CASE(_ret): {
2757 // Profile ret.
2758 BI_PROFILE_UPDATE_RET(/*bci=*/((int)(intptr_t)(LOCALS_ADDR(pc[1]))));
2759 // Now, update the pc.
2760 pc = istate->method()->code_base() + (intptr_t)(LOCALS_ADDR(pc[1]));
2761 UPDATE_PC_AND_CONTINUE(0);
2762 }
2763
2764 /* debugger breakpoint */
2765
2766 CASE(_breakpoint): {
2767 Bytecodes::Code original_bytecode;
2768 DECACHE_STATE();
2769 SET_LAST_JAVA_FRAME();
2770 original_bytecode = InterpreterRuntime::get_original_bytecode_at(THREAD,
2771 METHOD, pc);
2772 RESET_LAST_JAVA_FRAME();
2773 CACHE_STATE();
2774 if (THREAD->has_pending_exception()) goto handle_exception;
2775 CALL_VM(InterpreterRuntime::_breakpoint(THREAD, METHOD, pc),
2776 handle_exception);
2777
2778 opcode = (jubyte)original_bytecode;
2779 goto opcode_switch;
2780 }
2781
2782 DEFAULT:
2783 fatal(err_msg("Unimplemented opcode %d = %s", opcode,
2784 Bytecodes::name((Bytecodes::Code)opcode)));
2785 goto finish;
2786
2787 } /* switch(opc) */
2788
2789
2790 #ifdef USELABELS
2791 check_for_exception:
2792 #endif
2793 {
2794 if (!THREAD->has_pending_exception()) {
2795 CONTINUE;
2796 }
2797 /* We will be gcsafe soon, so flush our state. */
2798 DECACHE_PC();
2799 goto handle_exception;
2800 }
2801 do_continue: ;
2802
2803 } /* while (1) interpreter loop */
2804
2805
2806 // An exception exists in the thread state see whether this activation can handle it
2807 handle_exception: {
2808
2809 HandleMarkCleaner __hmc(THREAD);
2810 Handle except_oop(THREAD, THREAD->pending_exception());
2811 // Prevent any subsequent HandleMarkCleaner in the VM
2812 // from freeing the except_oop handle.
2813 HandleMark __hm(THREAD);
2814
2815 THREAD->clear_pending_exception();
2816 assert(except_oop(), "No exception to process");
2817 intptr_t continuation_bci;
2818 // expression stack is emptied
2819 topOfStack = istate->stack_base() - Interpreter::stackElementWords;
2820 CALL_VM(continuation_bci = (intptr_t)InterpreterRuntime::exception_handler_for_exception(THREAD, except_oop()),
2821 handle_exception);
2822
2823 except_oop = THREAD->vm_result();
2824 THREAD->set_vm_result(NULL);
2825 if (continuation_bci >= 0) {
2826 // Place exception on top of stack
2827 SET_STACK_OBJECT(except_oop(), 0);
2828 MORE_STACK(1);
2829 pc = METHOD->code_base() + continuation_bci;
2830 if (TraceExceptions) {
2831 ttyLocker ttyl;
2832 ResourceMark rm;
2833 tty->print_cr("Exception <%s> (" INTPTR_FORMAT ")", except_oop->print_value_string(), p2i(except_oop()));
2834 tty->print_cr(" thrown in interpreter method <%s>", METHOD->print_value_string());
2835 tty->print_cr(" at bci %d, continuing at %d for thread " INTPTR_FORMAT,
2836 (int)(istate->bcp() - METHOD->code_base()),
2837 (int)continuation_bci, p2i(THREAD));
2838 }
2839 // for AbortVMOnException flag
2840 NOT_PRODUCT(Exceptions::debug_check_abort(except_oop));
2841
2842 // Update profiling data.
2843 BI_PROFILE_ALIGN_TO_CURRENT_BCI();
2844 goto run;
2845 }
2846 if (TraceExceptions) {
2847 ttyLocker ttyl;
2848 ResourceMark rm;
2849 tty->print_cr("Exception <%s> (" INTPTR_FORMAT ")", except_oop->print_value_string(), p2i(except_oop()));
2850 tty->print_cr(" thrown in interpreter method <%s>", METHOD->print_value_string());
2851 tty->print_cr(" at bci %d, unwinding for thread " INTPTR_FORMAT,
2852 (int)(istate->bcp() - METHOD->code_base()),
2853 p2i(THREAD));
2854 }
2855 // for AbortVMOnException flag
2856 NOT_PRODUCT(Exceptions::debug_check_abort(except_oop));
2857 // No handler in this activation, unwind and try again
2858 THREAD->set_pending_exception(except_oop(), NULL, 0);
2859 goto handle_return;
2860 } // handle_exception:
2861
2862 // Return from an interpreter invocation with the result of the interpretation
2863 // on the top of the Java Stack (or a pending exception)
2864
2865 handle_Pop_Frame: {
2866
2867 // We don't really do anything special here except we must be aware
2868 // that we can get here without ever locking the method (if sync).
2869 // Also we skip the notification of the exit.
2870
2871 istate->set_msg(popping_frame);
2872 // Clear pending so while the pop is in process
2873 // we don't start another one if a call_vm is done.
2874 THREAD->clr_pop_frame_pending();
2875 // Let interpreter (only) see the we're in the process of popping a frame
2876 THREAD->set_pop_frame_in_process();
2877
2878 goto handle_return;
2879
2880 } // handle_Pop_Frame
2881
2882 // ForceEarlyReturn ends a method, and returns to the caller with a return value
2883 // given by the invoker of the early return.
2884 handle_Early_Return: {
2885
2886 istate->set_msg(early_return);
2887
2888 // Clear expression stack.
2889 topOfStack = istate->stack_base() - Interpreter::stackElementWords;
2890
2891 JvmtiThreadState *ts = THREAD->jvmti_thread_state();
2892
2893 // Push the value to be returned.
2894 switch (istate->method()->result_type()) {
2895 case T_BOOLEAN:
2896 case T_SHORT:
2897 case T_BYTE:
2898 case T_CHAR:
2899 case T_INT:
2900 SET_STACK_INT(ts->earlyret_value().i, 0);
2901 MORE_STACK(1);
2902 break;
2903 case T_LONG:
2904 SET_STACK_LONG(ts->earlyret_value().j, 1);
2905 MORE_STACK(2);
2906 break;
2907 case T_FLOAT:
2908 SET_STACK_FLOAT(ts->earlyret_value().f, 0);
2909 MORE_STACK(1);
2910 break;
2911 case T_DOUBLE:
2912 SET_STACK_DOUBLE(ts->earlyret_value().d, 1);
2913 MORE_STACK(2);
2914 break;
2915 case T_ARRAY:
2916 case T_OBJECT:
2917 SET_STACK_OBJECT(ts->earlyret_oop(), 0);
2918 MORE_STACK(1);
2919 break;
2920 }
2921
2922 ts->clr_earlyret_value();
2923 ts->set_earlyret_oop(NULL);
2924 ts->clr_earlyret_pending();
2925
2926 // Fall through to handle_return.
2927
2928 } // handle_Early_Return
2929
2930 handle_return: {
2931 // A storestore barrier is required to order initialization of
2932 // final fields with publishing the reference to the object that
2933 // holds the field. Without the barrier the value of final fields
2934 // can be observed to change.
2935 OrderAccess::storestore();
2936
2937 DECACHE_STATE();
2938
2939 bool suppress_error = istate->msg() == popping_frame || istate->msg() == early_return;
2940 bool suppress_exit_event = THREAD->has_pending_exception() || istate->msg() == popping_frame;
2941 Handle original_exception(THREAD, THREAD->pending_exception());
2942 Handle illegal_state_oop(THREAD, NULL);
2943
2944 // We'd like a HandleMark here to prevent any subsequent HandleMarkCleaner
2945 // in any following VM entries from freeing our live handles, but illegal_state_oop
2946 // isn't really allocated yet and so doesn't become live until later and
2947 // in unpredicatable places. Instead we must protect the places where we enter the
2948 // VM. It would be much simpler (and safer) if we could allocate a real handle with
2949 // a NULL oop in it and then overwrite the oop later as needed. This isn't
2950 // unfortunately isn't possible.
2951
2952 THREAD->clear_pending_exception();
2953
2954 //
2955 // As far as we are concerned we have returned. If we have a pending exception
2956 // that will be returned as this invocation's result. However if we get any
2957 // exception(s) while checking monitor state one of those IllegalMonitorStateExceptions
2958 // will be our final result (i.e. monitor exception trumps a pending exception).
2959 //
2960
2961 // If we never locked the method (or really passed the point where we would have),
2962 // there is no need to unlock it (or look for other monitors), since that
2963 // could not have happened.
2964
2965 if (THREAD->do_not_unlock()) {
2966
2967 // Never locked, reset the flag now because obviously any caller must
2968 // have passed their point of locking for us to have gotten here.
2969
2970 THREAD->clr_do_not_unlock();
2971 } else {
2972 // At this point we consider that we have returned. We now check that the
2973 // locks were properly block structured. If we find that they were not
2974 // used properly we will return with an illegal monitor exception.
2975 // The exception is checked by the caller not the callee since this
2976 // checking is considered to be part of the invocation and therefore
2977 // in the callers scope (JVM spec 8.13).
2978 //
2979 // Another weird thing to watch for is if the method was locked
2980 // recursively and then not exited properly. This means we must
2981 // examine all the entries in reverse time(and stack) order and
2982 // unlock as we find them. If we find the method monitor before
2983 // we are at the initial entry then we should throw an exception.
2984 // It is not clear the template based interpreter does this
2985 // correctly
2986
2987 BasicObjectLock* base = istate->monitor_base();
2988 BasicObjectLock* end = (BasicObjectLock*) istate->stack_base();
2989 bool method_unlock_needed = METHOD->is_synchronized();
2990 // We know the initial monitor was used for the method don't check that
2991 // slot in the loop
2992 if (method_unlock_needed) base--;
2993
2994 // Check all the monitors to see they are unlocked. Install exception if found to be locked.
2995 while (end < base) {
2996 oop lockee = end->obj();
2997 if (lockee != NULL) {
2998 BasicLock* lock = end->lock();
2999 markOop header = lock->displaced_header();
3000 end->set_obj(NULL);
3001
3002 if (!lockee->mark()->has_bias_pattern()) {
3003 // If it isn't recursive we either must swap old header or call the runtime
3004 if (header != NULL) {
3005 if (Atomic::cmpxchg_ptr(header, lockee->mark_addr(), lock) != lock) {
3006 // restore object for the slow case
3007 end->set_obj(lockee);
3008 {
3009 // Prevent any HandleMarkCleaner from freeing our live handles
3010 HandleMark __hm(THREAD);
3011 CALL_VM_NOCHECK(InterpreterRuntime::monitorexit(THREAD, end));
3012 }
3013 }
3014 }
3015 }
3016 // One error is plenty
3017 if (illegal_state_oop() == NULL && !suppress_error) {
3018 {
3019 // Prevent any HandleMarkCleaner from freeing our live handles
3020 HandleMark __hm(THREAD);
3021 CALL_VM_NOCHECK(InterpreterRuntime::throw_illegal_monitor_state_exception(THREAD));
3022 }
3023 assert(THREAD->has_pending_exception(), "Lost our exception!");
3024 illegal_state_oop = THREAD->pending_exception();
3025 THREAD->clear_pending_exception();
3026 }
3027 }
3028 end++;
3029 }
3030 // Unlock the method if needed
3031 if (method_unlock_needed) {
3032 if (base->obj() == NULL) {
3033 // The method is already unlocked this is not good.
3034 if (illegal_state_oop() == NULL && !suppress_error) {
3035 {
3036 // Prevent any HandleMarkCleaner from freeing our live handles
3037 HandleMark __hm(THREAD);
3038 CALL_VM_NOCHECK(InterpreterRuntime::throw_illegal_monitor_state_exception(THREAD));
3039 }
3040 assert(THREAD->has_pending_exception(), "Lost our exception!");
3041 illegal_state_oop = THREAD->pending_exception();
3042 THREAD->clear_pending_exception();
3043 }
3044 } else {
3045 //
3046 // The initial monitor is always used for the method
3047 // However if that slot is no longer the oop for the method it was unlocked
3048 // and reused by something that wasn't unlocked!
3049 //
3050 // deopt can come in with rcvr dead because c2 knows
3051 // its value is preserved in the monitor. So we can't use locals[0] at all
3052 // and must use first monitor slot.
3053 //
3054 oop rcvr = base->obj();
3055 if (rcvr == NULL) {
3056 if (!suppress_error) {
3057 VM_JAVA_ERROR_NO_JUMP(vmSymbols::java_lang_NullPointerException(), "", note_nullCheck_trap);
3058 illegal_state_oop = THREAD->pending_exception();
3059 THREAD->clear_pending_exception();
3060 }
3061 } else if (UseHeavyMonitors) {
3062 {
3063 // Prevent any HandleMarkCleaner from freeing our live handles.
3064 HandleMark __hm(THREAD);
3065 CALL_VM_NOCHECK(InterpreterRuntime::monitorexit(THREAD, base));
3066 }
3067 if (THREAD->has_pending_exception()) {
3068 if (!suppress_error) illegal_state_oop = THREAD->pending_exception();
3069 THREAD->clear_pending_exception();
3070 }
3071 } else {
3072 BasicLock* lock = base->lock();
3073 markOop header = lock->displaced_header();
3074 base->set_obj(NULL);
3075
3076 if (!rcvr->mark()->has_bias_pattern()) {
3077 base->set_obj(NULL);
3078 // If it isn't recursive we either must swap old header or call the runtime
3079 if (header != NULL) {
3080 if (Atomic::cmpxchg_ptr(header, rcvr->mark_addr(), lock) != lock) {
3081 // restore object for the slow case
3082 base->set_obj(rcvr);
3083 {
3084 // Prevent any HandleMarkCleaner from freeing our live handles
3085 HandleMark __hm(THREAD);
3086 CALL_VM_NOCHECK(InterpreterRuntime::monitorexit(THREAD, base));
3087 }
3088 if (THREAD->has_pending_exception()) {
3089 if (!suppress_error) illegal_state_oop = THREAD->pending_exception();
3090 THREAD->clear_pending_exception();
3091 }
3092 }
3093 }
3094 }
3095 }
3096 }
3097 }
3098 }
3099 // Clear the do_not_unlock flag now.
3100 THREAD->clr_do_not_unlock();
3101
3102 //
3103 // Notify jvmti/jvmdi
3104 //
3105 // NOTE: we do not notify a method_exit if we have a pending exception,
3106 // including an exception we generate for unlocking checks. In the former
3107 // case, JVMDI has already been notified by our call for the exception handler
3108 // and in both cases as far as JVMDI is concerned we have already returned.
3109 // If we notify it again JVMDI will be all confused about how many frames
3110 // are still on the stack (4340444).
3111 //
3112 // NOTE Further! It turns out the the JVMTI spec in fact expects to see
3113 // method_exit events whenever we leave an activation unless it was done
3114 // for popframe. This is nothing like jvmdi. However we are passing the
3115 // tests at the moment (apparently because they are jvmdi based) so rather
3116 // than change this code and possibly fail tests we will leave it alone
3117 // (with this note) in anticipation of changing the vm and the tests
3118 // simultaneously.
3119
3120
3121 //
3122 suppress_exit_event = suppress_exit_event || illegal_state_oop() != NULL;
3123
3124
3125
3126 #ifdef VM_JVMTI
3127 if (_jvmti_interp_events) {
3128 // Whenever JVMTI puts a thread in interp_only_mode, method
3129 // entry/exit events are sent for that thread to track stack depth.
3130 if ( !suppress_exit_event && THREAD->is_interp_only_mode() ) {
3131 {
3132 // Prevent any HandleMarkCleaner from freeing our live handles
3133 HandleMark __hm(THREAD);
3134 CALL_VM_NOCHECK(InterpreterRuntime::post_method_exit(THREAD));
3135 }
3136 }
3137 }
3138 #endif /* VM_JVMTI */
3139
3140 //
3141 // See if we are returning any exception
3142 // A pending exception that was pending prior to a possible popping frame
3143 // overrides the popping frame.
3144 //
3145 assert(!suppress_error || (suppress_error && illegal_state_oop() == NULL), "Error was not suppressed");
3146 if (illegal_state_oop() != NULL || original_exception() != NULL) {
3147 // Inform the frame manager we have no result.
3148 istate->set_msg(throwing_exception);
3149 if (illegal_state_oop() != NULL)
3150 THREAD->set_pending_exception(illegal_state_oop(), NULL, 0);
3151 else
3152 THREAD->set_pending_exception(original_exception(), NULL, 0);
3153 UPDATE_PC_AND_RETURN(0);
3154 }
3155
3156 if (istate->msg() == popping_frame) {
3157 // Make it simpler on the assembly code and set the message for the frame pop.
3158 // returns
3159 if (istate->prev() == NULL) {
3160 // We must be returning to a deoptimized frame (because popframe only happens between
3161 // two interpreted frames). We need to save the current arguments in C heap so that
3162 // the deoptimized frame when it restarts can copy the arguments to its expression
3163 // stack and re-execute the call. We also have to notify deoptimization that this
3164 // has occurred and to pick the preserved args copy them to the deoptimized frame's
3165 // java expression stack. Yuck.
3166 //
3167 THREAD->popframe_preserve_args(in_ByteSize(METHOD->size_of_parameters() * wordSize),
3168 LOCALS_SLOT(METHOD->size_of_parameters() - 1));
3169 THREAD->set_popframe_condition_bit(JavaThread::popframe_force_deopt_reexecution_bit);
3170 }
3171 } else {
3172 istate->set_msg(return_from_method);
3173 }
3174
3175 // Normal return
3176 // Advance the pc and return to frame manager
3177 UPDATE_PC_AND_RETURN(1);
3178 } /* handle_return: */
3179
3180 // This is really a fatal error return
3181
3182 finish:
3183 DECACHE_TOS();
3184 DECACHE_PC();
3185
3186 return;
3187 }
3188
3189 /*
3190 * All the code following this point is only produced once and is not present
3191 * in the JVMTI version of the interpreter
3192 */
3193
3194 #ifndef VM_JVMTI
3195
3196 // This constructor should only be used to contruct the object to signal
3197 // interpreter initialization. All other instances should be created by
3198 // the frame manager.
3199 BytecodeInterpreter::BytecodeInterpreter(messages msg) {
3200 if (msg != initialize) ShouldNotReachHere();
3201 _msg = msg;
3202 _self_link = this;
3203 _prev_link = NULL;
3204 }
3205
3206 // Inline static functions for Java Stack and Local manipulation
3207
3208 // The implementations are platform dependent. We have to worry about alignment
3209 // issues on some machines which can change on the same platform depending on
3210 // whether it is an LP64 machine also.
3211 address BytecodeInterpreter::stack_slot(intptr_t *tos, int offset) {
3212 return (address) tos[Interpreter::expr_index_at(-offset)];
3213 }
3214
3215 jint BytecodeInterpreter::stack_int(intptr_t *tos, int offset) {
3216 return *((jint*) &tos[Interpreter::expr_index_at(-offset)]);
3217 }
3218
3219 jfloat BytecodeInterpreter::stack_float(intptr_t *tos, int offset) {
3220 return *((jfloat *) &tos[Interpreter::expr_index_at(-offset)]);
3221 }
3222
3223 oop BytecodeInterpreter::stack_object(intptr_t *tos, int offset) {
3224 return cast_to_oop(tos [Interpreter::expr_index_at(-offset)]);
3225 }
3226
3227 jdouble BytecodeInterpreter::stack_double(intptr_t *tos, int offset) {
3228 return ((VMJavaVal64*) &tos[Interpreter::expr_index_at(-offset)])->d;
3229 }
3230
3231 jlong BytecodeInterpreter::stack_long(intptr_t *tos, int offset) {
3232 return ((VMJavaVal64 *) &tos[Interpreter::expr_index_at(-offset)])->l;
3233 }
3234
3235 // only used for value types
3236 void BytecodeInterpreter::set_stack_slot(intptr_t *tos, address value,
3237 int offset) {
3238 *((address *)&tos[Interpreter::expr_index_at(-offset)]) = value;
3239 }
3240
3241 void BytecodeInterpreter::set_stack_int(intptr_t *tos, int value,
3242 int offset) {
3243 *((jint *)&tos[Interpreter::expr_index_at(-offset)]) = value;
3244 }
3245
3246 void BytecodeInterpreter::set_stack_float(intptr_t *tos, jfloat value,
3247 int offset) {
3248 *((jfloat *)&tos[Interpreter::expr_index_at(-offset)]) = value;
3249 }
3250
3251 void BytecodeInterpreter::set_stack_object(intptr_t *tos, oop value,
3252 int offset) {
3253 *((oop *)&tos[Interpreter::expr_index_at(-offset)]) = value;
3254 }
3255
3256 // needs to be platform dep for the 32 bit platforms.
3257 void BytecodeInterpreter::set_stack_double(intptr_t *tos, jdouble value,
3258 int offset) {
3259 ((VMJavaVal64*)&tos[Interpreter::expr_index_at(-offset)])->d = value;
3260 }
3261
3262 void BytecodeInterpreter::set_stack_double_from_addr(intptr_t *tos,
3263 address addr, int offset) {
3264 (((VMJavaVal64*)&tos[Interpreter::expr_index_at(-offset)])->d =
3265 ((VMJavaVal64*)addr)->d);
3266 }
3267
3268 void BytecodeInterpreter::set_stack_long(intptr_t *tos, jlong value,
3269 int offset) {
3270 ((VMJavaVal64*)&tos[Interpreter::expr_index_at(-offset+1)])->l = 0xdeedbeeb;
3271 ((VMJavaVal64*)&tos[Interpreter::expr_index_at(-offset)])->l = value;
3272 }
3273
3274 void BytecodeInterpreter::set_stack_long_from_addr(intptr_t *tos,
3275 address addr, int offset) {
3276 ((VMJavaVal64*)&tos[Interpreter::expr_index_at(-offset+1)])->l = 0xdeedbeeb;
3277 ((VMJavaVal64*)&tos[Interpreter::expr_index_at(-offset)])->l =
3278 ((VMJavaVal64*)addr)->l;
3279 }
3280
3281 // Locals
3282
3283 address BytecodeInterpreter::locals_slot(intptr_t* locals, int offset) {
3284 return (address)locals[Interpreter::local_index_at(-offset)];
3285 }
3286 jint BytecodeInterpreter::locals_int(intptr_t* locals, int offset) {
3287 return (jint)locals[Interpreter::local_index_at(-offset)];
3288 }
3289 jfloat BytecodeInterpreter::locals_float(intptr_t* locals, int offset) {
3290 return (jfloat)locals[Interpreter::local_index_at(-offset)];
3291 }
3292 oop BytecodeInterpreter::locals_object(intptr_t* locals, int offset) {
3293 return cast_to_oop(locals[Interpreter::local_index_at(-offset)]);
3294 }
3295 jdouble BytecodeInterpreter::locals_double(intptr_t* locals, int offset) {
3296 return ((VMJavaVal64*)&locals[Interpreter::local_index_at(-(offset+1))])->d;
3297 }
3298 jlong BytecodeInterpreter::locals_long(intptr_t* locals, int offset) {
3299 return ((VMJavaVal64*)&locals[Interpreter::local_index_at(-(offset+1))])->l;
3300 }
3301
3302 // Returns the address of locals value.
3303 address BytecodeInterpreter::locals_long_at(intptr_t* locals, int offset) {
3304 return ((address)&locals[Interpreter::local_index_at(-(offset+1))]);
3305 }
3306 address BytecodeInterpreter::locals_double_at(intptr_t* locals, int offset) {
3307 return ((address)&locals[Interpreter::local_index_at(-(offset+1))]);
3308 }
3309
3310 // Used for local value or returnAddress
3311 void BytecodeInterpreter::set_locals_slot(intptr_t *locals,
3312 address value, int offset) {
3313 *((address*)&locals[Interpreter::local_index_at(-offset)]) = value;
3314 }
3315 void BytecodeInterpreter::set_locals_int(intptr_t *locals,
3316 jint value, int offset) {
3317 *((jint *)&locals[Interpreter::local_index_at(-offset)]) = value;
3318 }
3319 void BytecodeInterpreter::set_locals_float(intptr_t *locals,
3320 jfloat value, int offset) {
3321 *((jfloat *)&locals[Interpreter::local_index_at(-offset)]) = value;
3322 }
3323 void BytecodeInterpreter::set_locals_object(intptr_t *locals,
3324 oop value, int offset) {
3325 *((oop *)&locals[Interpreter::local_index_at(-offset)]) = value;
3326 }
3327 void BytecodeInterpreter::set_locals_double(intptr_t *locals,
3328 jdouble value, int offset) {
3329 ((VMJavaVal64*)&locals[Interpreter::local_index_at(-(offset+1))])->d = value;
3330 }
3331 void BytecodeInterpreter::set_locals_long(intptr_t *locals,
3332 jlong value, int offset) {
3333 ((VMJavaVal64*)&locals[Interpreter::local_index_at(-(offset+1))])->l = value;
3334 }
3335 void BytecodeInterpreter::set_locals_double_from_addr(intptr_t *locals,
3336 address addr, int offset) {
3337 ((VMJavaVal64*)&locals[Interpreter::local_index_at(-(offset+1))])->d = ((VMJavaVal64*)addr)->d;
3338 }
3339 void BytecodeInterpreter::set_locals_long_from_addr(intptr_t *locals,
3340 address addr, int offset) {
3341 ((VMJavaVal64*)&locals[Interpreter::local_index_at(-(offset+1))])->l = ((VMJavaVal64*)addr)->l;
3342 }
3343
3344 void BytecodeInterpreter::astore(intptr_t* tos, int stack_offset,
3345 intptr_t* locals, int locals_offset) {
3346 intptr_t value = tos[Interpreter::expr_index_at(-stack_offset)];
3347 locals[Interpreter::local_index_at(-locals_offset)] = value;
3348 }
3349
3350
3351 void BytecodeInterpreter::copy_stack_slot(intptr_t *tos, int from_offset,
3352 int to_offset) {
3353 tos[Interpreter::expr_index_at(-to_offset)] =
3354 (intptr_t)tos[Interpreter::expr_index_at(-from_offset)];
3355 }
3356
3357 void BytecodeInterpreter::dup(intptr_t *tos) {
3358 copy_stack_slot(tos, -1, 0);
3359 }
3360 void BytecodeInterpreter::dup2(intptr_t *tos) {
3361 copy_stack_slot(tos, -2, 0);
3362 copy_stack_slot(tos, -1, 1);
3363 }
3364
3365 void BytecodeInterpreter::dup_x1(intptr_t *tos) {
3366 /* insert top word two down */
3367 copy_stack_slot(tos, -1, 0);
3368 copy_stack_slot(tos, -2, -1);
3369 copy_stack_slot(tos, 0, -2);
3370 }
3371
3372 void BytecodeInterpreter::dup_x2(intptr_t *tos) {
3373 /* insert top word three down */
3374 copy_stack_slot(tos, -1, 0);
3375 copy_stack_slot(tos, -2, -1);
3376 copy_stack_slot(tos, -3, -2);
3377 copy_stack_slot(tos, 0, -3);
3378 }
3379 void BytecodeInterpreter::dup2_x1(intptr_t *tos) {
3380 /* insert top 2 slots three down */
3381 copy_stack_slot(tos, -1, 1);
3382 copy_stack_slot(tos, -2, 0);
3383 copy_stack_slot(tos, -3, -1);
3384 copy_stack_slot(tos, 1, -2);
3385 copy_stack_slot(tos, 0, -3);
3386 }
3387 void BytecodeInterpreter::dup2_x2(intptr_t *tos) {
3388 /* insert top 2 slots four down */
3389 copy_stack_slot(tos, -1, 1);
3390 copy_stack_slot(tos, -2, 0);
3391 copy_stack_slot(tos, -3, -1);
3392 copy_stack_slot(tos, -4, -2);
3393 copy_stack_slot(tos, 1, -3);
3394 copy_stack_slot(tos, 0, -4);
3395 }
3396
3397
3398 void BytecodeInterpreter::swap(intptr_t *tos) {
3399 // swap top two elements
3400 intptr_t val = tos[Interpreter::expr_index_at(1)];
3401 // Copy -2 entry to -1
3402 copy_stack_slot(tos, -2, -1);
3403 // Store saved -1 entry into -2
3404 tos[Interpreter::expr_index_at(2)] = val;
3405 }
3406 // --------------------------------------------------------------------------------
3407 // Non-product code
3408 #ifndef PRODUCT
3409
3410 const char* BytecodeInterpreter::C_msg(BytecodeInterpreter::messages msg) {
3411 switch (msg) {
3412 case BytecodeInterpreter::no_request: return("no_request");
3413 case BytecodeInterpreter::initialize: return("initialize");
3414 // status message to C++ interpreter
3415 case BytecodeInterpreter::method_entry: return("method_entry");
3416 case BytecodeInterpreter::method_resume: return("method_resume");
3417 case BytecodeInterpreter::got_monitors: return("got_monitors");
3418 case BytecodeInterpreter::rethrow_exception: return("rethrow_exception");
3419 // requests to frame manager from C++ interpreter
3420 case BytecodeInterpreter::call_method: return("call_method");
3421 case BytecodeInterpreter::return_from_method: return("return_from_method");
3422 case BytecodeInterpreter::more_monitors: return("more_monitors");
3423 case BytecodeInterpreter::throwing_exception: return("throwing_exception");
3424 case BytecodeInterpreter::popping_frame: return("popping_frame");
3425 case BytecodeInterpreter::do_osr: return("do_osr");
3426 // deopt
3427 case BytecodeInterpreter::deopt_resume: return("deopt_resume");
3428 case BytecodeInterpreter::deopt_resume2: return("deopt_resume2");
3429 default: return("BAD MSG");
3430 }
3431 }
3432 void
3433 BytecodeInterpreter::print() {
3434 tty->print_cr("thread: " INTPTR_FORMAT, (uintptr_t) this->_thread);
3435 tty->print_cr("bcp: " INTPTR_FORMAT, (uintptr_t) this->_bcp);
3436 tty->print_cr("locals: " INTPTR_FORMAT, (uintptr_t) this->_locals);
3437 tty->print_cr("constants: " INTPTR_FORMAT, (uintptr_t) this->_constants);
3438 {
3439 ResourceMark rm;
3440 char *method_name = _method->name_and_sig_as_C_string();
3441 tty->print_cr("method: " INTPTR_FORMAT "[ %s ]", (uintptr_t) this->_method, method_name);
3442 }
3443 tty->print_cr("mdx: " INTPTR_FORMAT, (uintptr_t) this->_mdx);
3444 tty->print_cr("stack: " INTPTR_FORMAT, (uintptr_t) this->_stack);
3445 tty->print_cr("msg: %s", C_msg(this->_msg));
3446 tty->print_cr("result_to_call._callee: " INTPTR_FORMAT, (uintptr_t) this->_result._to_call._callee);
3447 tty->print_cr("result_to_call._callee_entry_point: " INTPTR_FORMAT, (uintptr_t) this->_result._to_call._callee_entry_point);
3448 tty->print_cr("result_to_call._bcp_advance: %d ", this->_result._to_call._bcp_advance);
3449 tty->print_cr("osr._osr_buf: " INTPTR_FORMAT, (uintptr_t) this->_result._osr._osr_buf);
3450 tty->print_cr("osr._osr_entry: " INTPTR_FORMAT, (uintptr_t) this->_result._osr._osr_entry);
3451 tty->print_cr("prev_link: " INTPTR_FORMAT, (uintptr_t) this->_prev_link);
3452 tty->print_cr("native_mirror: " INTPTR_FORMAT, (uintptr_t) p2i(this->_oop_temp));
3453 tty->print_cr("stack_base: " INTPTR_FORMAT, (uintptr_t) this->_stack_base);
3454 tty->print_cr("stack_limit: " INTPTR_FORMAT, (uintptr_t) this->_stack_limit);
3455 tty->print_cr("monitor_base: " INTPTR_FORMAT, (uintptr_t) this->_monitor_base);
3456 #ifdef SPARC
3457 tty->print_cr("last_Java_pc: " INTPTR_FORMAT, (uintptr_t) this->_last_Java_pc);
3458 tty->print_cr("frame_bottom: " INTPTR_FORMAT, (uintptr_t) this->_frame_bottom);
3459 tty->print_cr("&native_fresult: " INTPTR_FORMAT, (uintptr_t) &this->_native_fresult);
3460 tty->print_cr("native_lresult: " INTPTR_FORMAT, (uintptr_t) this->_native_lresult);
3461 #endif
3462 #if !defined(ZERO)
3463 tty->print_cr("last_Java_fp: " INTPTR_FORMAT, (uintptr_t) this->_last_Java_fp);
3464 #endif // !ZERO
3465 tty->print_cr("self_link: " INTPTR_FORMAT, (uintptr_t) this->_self_link);
3466 }
3467
3468 extern "C" {
3469 void PI(uintptr_t arg) {
3470 ((BytecodeInterpreter*)arg)->print();
3471 }
3472 }
3473 #endif // PRODUCT
3474
3475 #endif // JVMTI
3476 #endif // CC_INTERP