1 /*
2 * Copyright (c) 2002, 2011, 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/interpreter.hpp"
32 #include "interpreter/interpreterRuntime.hpp"
33 #include "memory/cardTableModRefBS.hpp"
34 #include "memory/resourceArea.hpp"
35 #include "oops/objArrayKlass.hpp"
36 #include "oops/oop.inline.hpp"
37 #include "prims/jvmtiExport.hpp"
38 #include "runtime/frame.inline.hpp"
39 #include "runtime/handles.inline.hpp"
40 #include "runtime/interfaceSupport.hpp"
41 #include "runtime/sharedRuntime.hpp"
42 #include "runtime/threadCritical.hpp"
43 #include "utilities/exceptions.hpp"
44 #ifdef TARGET_OS_ARCH_linux_x86
45 # include "orderAccess_linux_x86.inline.hpp"
46 #endif
47 #ifdef TARGET_OS_ARCH_linux_sparc
48 # include "orderAccess_linux_sparc.inline.hpp"
49 #endif
50 #ifdef TARGET_OS_ARCH_linux_zero
51 # include "orderAccess_linux_zero.inline.hpp"
52 #endif
53 #ifdef TARGET_OS_ARCH_solaris_x86
54 # include "orderAccess_solaris_x86.inline.hpp"
55 #endif
56 #ifdef TARGET_OS_ARCH_solaris_sparc
57 # include "orderAccess_solaris_sparc.inline.hpp"
58 #endif
59 #ifdef TARGET_OS_ARCH_windows_x86
60 # include "orderAccess_windows_x86.inline.hpp"
61 #endif
62 #ifdef TARGET_OS_ARCH_linux_arm
63 # include "orderAccess_linux_arm.inline.hpp"
64 #endif
65 #ifdef TARGET_OS_ARCH_linux_ppc
66 # include "orderAccess_linux_ppc.inline.hpp"
67 #endif
68 #ifdef TARGET_OS_ARCH_bsd_x86
69 # include "orderAccess_bsd_x86.inline.hpp"
70 #endif
71 #ifdef TARGET_OS_ARCH_bsd_zero
72 # include "orderAccess_bsd_zero.inline.hpp"
73 #endif
74
75
76 // no precompiled headers
77 #ifdef CC_INTERP
78
79 /*
80 * USELABELS - If using GCC, then use labels for the opcode dispatching
81 * rather -then a switch statement. This improves performance because it
82 * gives us the oportunity to have the instructions that calculate the
83 * next opcode to jump to be intermixed with the rest of the instructions
84 * that implement the opcode (see UPDATE_PC_AND_TOS_AND_CONTINUE macro).
85 */
86 #undef USELABELS
87 #ifdef __GNUC__
88 /*
89 ASSERT signifies debugging. It is much easier to step thru bytecodes if we
90 don't use the computed goto approach.
91 */
92 #ifndef ASSERT
93 #define USELABELS
94 #endif
95 #endif
96
97 #undef CASE
98 #ifdef USELABELS
99 #define CASE(opcode) opc ## opcode
100 #define DEFAULT opc_default
101 #else
102 #define CASE(opcode) case Bytecodes:: opcode
103 #define DEFAULT default
104 #endif
105
106 /*
107 * PREFETCH_OPCCODE - Some compilers do better if you prefetch the next
108 * opcode before going back to the top of the while loop, rather then having
109 * the top of the while loop handle it. This provides a better opportunity
110 * for instruction scheduling. Some compilers just do this prefetch
111 * automatically. Some actually end up with worse performance if you
112 * force the prefetch. Solaris gcc seems to do better, but cc does worse.
113 */
114 #undef PREFETCH_OPCCODE
115 #define PREFETCH_OPCCODE
116
117 /*
118 Interpreter safepoint: it is expected that the interpreter will have no live
119 handles of its own creation live at an interpreter safepoint. Therefore we
120 run a HandleMarkCleaner and trash all handles allocated in the call chain
121 since the JavaCalls::call_helper invocation that initiated the chain.
122 There really shouldn't be any handles remaining to trash but this is cheap
123 in relation to a safepoint.
124 */
125 #define SAFEPOINT \
126 if ( SafepointSynchronize::is_synchronizing()) { \
127 { \
128 /* zap freed handles rather than GC'ing them */ \
129 HandleMarkCleaner __hmc(THREAD); \
130 } \
131 CALL_VM(SafepointSynchronize::block(THREAD), handle_exception); \
132 }
133
134 /*
135 * VM_JAVA_ERROR - Macro for throwing a java exception from
136 * the interpreter loop. Should really be a CALL_VM but there
137 * is no entry point to do the transition to vm so we just
138 * do it by hand here.
139 */
140 #define VM_JAVA_ERROR_NO_JUMP(name, msg) \
141 DECACHE_STATE(); \
142 SET_LAST_JAVA_FRAME(); \
143 { \
144 ThreadInVMfromJava trans(THREAD); \
145 Exceptions::_throw_msg(THREAD, __FILE__, __LINE__, name, msg); \
146 } \
147 RESET_LAST_JAVA_FRAME(); \
148 CACHE_STATE();
149
150 // Normal throw of a java error
151 #define VM_JAVA_ERROR(name, msg) \
152 VM_JAVA_ERROR_NO_JUMP(name, msg) \
153 goto handle_exception;
154
155 #ifdef PRODUCT
156 #define DO_UPDATE_INSTRUCTION_COUNT(opcode)
157 #else
158 #define DO_UPDATE_INSTRUCTION_COUNT(opcode) \
159 { \
160 BytecodeCounter::_counter_value++; \
161 BytecodeHistogram::_counters[(Bytecodes::Code)opcode]++; \
162 if (StopInterpreterAt && StopInterpreterAt == BytecodeCounter::_counter_value) os::breakpoint(); \
163 if (TraceBytecodes) { \
164 CALL_VM((void)SharedRuntime::trace_bytecode(THREAD, 0, \
165 topOfStack[Interpreter::expr_index_at(1)], \
166 topOfStack[Interpreter::expr_index_at(2)]), \
167 handle_exception); \
168 } \
169 }
170 #endif
171
172 #undef DEBUGGER_SINGLE_STEP_NOTIFY
173 #ifdef VM_JVMTI
174 /* NOTE: (kbr) This macro must be called AFTER the PC has been
175 incremented. JvmtiExport::at_single_stepping_point() may cause a
176 breakpoint opcode to get inserted at the current PC to allow the
177 debugger to coalesce single-step events.
178
179 As a result if we call at_single_stepping_point() we refetch opcode
180 to get the current opcode. This will override any other prefetching
181 that might have occurred.
182 */
183 #define DEBUGGER_SINGLE_STEP_NOTIFY() \
184 { \
185 if (_jvmti_interp_events) { \
186 if (JvmtiExport::should_post_single_step()) { \
187 DECACHE_STATE(); \
188 SET_LAST_JAVA_FRAME(); \
189 ThreadInVMfromJava trans(THREAD); \
190 JvmtiExport::at_single_stepping_point(THREAD, \
191 istate->method(), \
192 pc); \
193 RESET_LAST_JAVA_FRAME(); \
194 CACHE_STATE(); \
195 if (THREAD->pop_frame_pending() && \
196 !THREAD->pop_frame_in_process()) { \
197 goto handle_Pop_Frame; \
198 } \
199 opcode = *pc; \
200 } \
201 } \
202 }
203 #else
204 #define DEBUGGER_SINGLE_STEP_NOTIFY()
205 #endif
206
207 /*
208 * CONTINUE - Macro for executing the next opcode.
209 */
210 #undef CONTINUE
211 #ifdef USELABELS
212 // Have to do this dispatch this way in C++ because otherwise gcc complains about crossing an
213 // initialization (which is is the initialization of the table pointer...)
214 #define DISPATCH(opcode) goto *(void*)dispatch_table[opcode]
215 #define CONTINUE { \
216 opcode = *pc; \
217 DO_UPDATE_INSTRUCTION_COUNT(opcode); \
218 DEBUGGER_SINGLE_STEP_NOTIFY(); \
219 DISPATCH(opcode); \
220 }
221 #else
222 #ifdef PREFETCH_OPCCODE
223 #define CONTINUE { \
224 opcode = *pc; \
225 DO_UPDATE_INSTRUCTION_COUNT(opcode); \
226 DEBUGGER_SINGLE_STEP_NOTIFY(); \
227 continue; \
228 }
229 #else
230 #define CONTINUE { \
231 DO_UPDATE_INSTRUCTION_COUNT(opcode); \
232 DEBUGGER_SINGLE_STEP_NOTIFY(); \
233 continue; \
234 }
235 #endif
236 #endif
237
238 // JavaStack Implementation
239 #define MORE_STACK(count) \
240 (topOfStack -= ((count) * Interpreter::stackElementWords))
241
242
243 #define UPDATE_PC(opsize) {pc += opsize; }
244 /*
245 * UPDATE_PC_AND_TOS - Macro for updating the pc and topOfStack.
246 */
247 #undef UPDATE_PC_AND_TOS
248 #define UPDATE_PC_AND_TOS(opsize, stack) \
249 {pc += opsize; MORE_STACK(stack); }
250
251 /*
252 * UPDATE_PC_AND_TOS_AND_CONTINUE - Macro for updating the pc and topOfStack,
253 * and executing the next opcode. It's somewhat similar to the combination
254 * of UPDATE_PC_AND_TOS and CONTINUE, but with some minor optimizations.
255 */
256 #undef UPDATE_PC_AND_TOS_AND_CONTINUE
257 #ifdef USELABELS
258 #define UPDATE_PC_AND_TOS_AND_CONTINUE(opsize, stack) { \
259 pc += opsize; opcode = *pc; MORE_STACK(stack); \
260 DO_UPDATE_INSTRUCTION_COUNT(opcode); \
261 DEBUGGER_SINGLE_STEP_NOTIFY(); \
262 DISPATCH(opcode); \
263 }
264
265 #define UPDATE_PC_AND_CONTINUE(opsize) { \
266 pc += opsize; opcode = *pc; \
267 DO_UPDATE_INSTRUCTION_COUNT(opcode); \
268 DEBUGGER_SINGLE_STEP_NOTIFY(); \
269 DISPATCH(opcode); \
270 }
271 #else
272 #ifdef PREFETCH_OPCCODE
273 #define UPDATE_PC_AND_TOS_AND_CONTINUE(opsize, stack) { \
274 pc += opsize; opcode = *pc; MORE_STACK(stack); \
275 DO_UPDATE_INSTRUCTION_COUNT(opcode); \
276 DEBUGGER_SINGLE_STEP_NOTIFY(); \
277 goto do_continue; \
278 }
279
280 #define UPDATE_PC_AND_CONTINUE(opsize) { \
281 pc += opsize; opcode = *pc; \
282 DO_UPDATE_INSTRUCTION_COUNT(opcode); \
283 DEBUGGER_SINGLE_STEP_NOTIFY(); \
284 goto do_continue; \
285 }
286 #else
287 #define UPDATE_PC_AND_TOS_AND_CONTINUE(opsize, stack) { \
288 pc += opsize; MORE_STACK(stack); \
289 DO_UPDATE_INSTRUCTION_COUNT(opcode); \
290 DEBUGGER_SINGLE_STEP_NOTIFY(); \
291 goto do_continue; \
292 }
293
294 #define UPDATE_PC_AND_CONTINUE(opsize) { \
295 pc += opsize; \
296 DO_UPDATE_INSTRUCTION_COUNT(opcode); \
297 DEBUGGER_SINGLE_STEP_NOTIFY(); \
298 goto do_continue; \
299 }
300 #endif /* PREFETCH_OPCCODE */
301 #endif /* USELABELS */
302
303 // About to call a new method, update the save the adjusted pc and return to frame manager
304 #define UPDATE_PC_AND_RETURN(opsize) \
305 DECACHE_TOS(); \
306 istate->set_bcp(pc+opsize); \
307 return;
308
309
310 #define METHOD istate->method()
311 #define INVOCATION_COUNT METHOD->invocation_counter()
312 #define BACKEDGE_COUNT METHOD->backedge_counter()
313
314
315 #define INCR_INVOCATION_COUNT INVOCATION_COUNT->increment()
316 #define OSR_REQUEST(res, branch_pc) \
317 CALL_VM(res=InterpreterRuntime::frequency_counter_overflow(THREAD, branch_pc), handle_exception);
318 /*
319 * For those opcodes that need to have a GC point on a backwards branch
320 */
321
322 // Backedge counting is kind of strange. The asm interpreter will increment
323 // the backedge counter as a separate counter but it does it's comparisons
324 // to the sum (scaled) of invocation counter and backedge count to make
325 // a decision. Seems kind of odd to sum them together like that
326
327 // skip is delta from current bcp/bci for target, branch_pc is pre-branch bcp
328
329
330 #define DO_BACKEDGE_CHECKS(skip, branch_pc) \
331 if ((skip) <= 0) { \
332 if (UseLoopCounter) { \
333 bool do_OSR = UseOnStackReplacement; \
334 BACKEDGE_COUNT->increment(); \
335 if (do_OSR) do_OSR = BACKEDGE_COUNT->reached_InvocationLimit(); \
336 if (do_OSR) { \
337 nmethod* osr_nmethod; \
338 OSR_REQUEST(osr_nmethod, branch_pc); \
339 if (osr_nmethod != NULL && osr_nmethod->osr_entry_bci() != InvalidOSREntryBci) { \
340 intptr_t* buf = SharedRuntime::OSR_migration_begin(THREAD); \
341 istate->set_msg(do_osr); \
342 istate->set_osr_buf((address)buf); \
343 istate->set_osr_entry(osr_nmethod->osr_entry()); \
344 return; \
345 } \
346 } \
347 } /* UseCompiler ... */ \
348 INCR_INVOCATION_COUNT; \
349 SAFEPOINT; \
350 }
351
352 /*
353 * For those opcodes that need to have a GC point on a backwards branch
354 */
355
356 /*
357 * Macros for caching and flushing the interpreter state. Some local
358 * variables need to be flushed out to the frame before we do certain
359 * things (like pushing frames or becomming gc safe) and some need to
360 * be recached later (like after popping a frame). We could use one
361 * macro to cache or decache everything, but this would be less then
362 * optimal because we don't always need to cache or decache everything
363 * because some things we know are already cached or decached.
364 */
365 #undef DECACHE_TOS
366 #undef CACHE_TOS
367 #undef CACHE_PREV_TOS
368 #define DECACHE_TOS() istate->set_stack(topOfStack);
369
370 #define CACHE_TOS() topOfStack = (intptr_t *)istate->stack();
371
372 #undef DECACHE_PC
373 #undef CACHE_PC
374 #define DECACHE_PC() istate->set_bcp(pc);
375 #define CACHE_PC() pc = istate->bcp();
376 #define CACHE_CP() cp = istate->constants();
377 #define CACHE_LOCALS() locals = istate->locals();
378 #undef CACHE_FRAME
379 #define CACHE_FRAME()
380
381 /*
382 * CHECK_NULL - Macro for throwing a NullPointerException if the object
383 * passed is a null ref.
384 * On some architectures/platforms it should be possible to do this implicitly
385 */
386 #undef CHECK_NULL
387 #define CHECK_NULL(obj_) \
388 if ((obj_) == NULL) { \
389 VM_JAVA_ERROR(vmSymbols::java_lang_NullPointerException(), ""); \
390 } \
391 VERIFY_OOP(obj_)
392
393 #define VMdoubleConstZero() 0.0
394 #define VMdoubleConstOne() 1.0
395 #define VMlongConstZero() (max_jlong-max_jlong)
396 #define VMlongConstOne() ((max_jlong-max_jlong)+1)
397
398 /*
399 * Alignment
400 */
401 #define VMalignWordUp(val) (((uintptr_t)(val) + 3) & ~3)
402
403 // Decache the interpreter state that interpreter modifies directly (i.e. GC is indirect mod)
404 #define DECACHE_STATE() DECACHE_PC(); DECACHE_TOS();
405
406 // Reload interpreter state after calling the VM or a possible GC
407 #define CACHE_STATE() \
408 CACHE_TOS(); \
409 CACHE_PC(); \
410 CACHE_CP(); \
411 CACHE_LOCALS();
412
413 // Call the VM don't check for pending exceptions
414 #define CALL_VM_NOCHECK(func) \
415 DECACHE_STATE(); \
416 SET_LAST_JAVA_FRAME(); \
417 func; \
418 RESET_LAST_JAVA_FRAME(); \
419 CACHE_STATE(); \
420 if (THREAD->pop_frame_pending() && \
421 !THREAD->pop_frame_in_process()) { \
422 goto handle_Pop_Frame; \
423 }
424
425 // Call the VM and check for pending exceptions
426 #define CALL_VM(func, label) { \
427 CALL_VM_NOCHECK(func); \
428 if (THREAD->has_pending_exception()) goto label; \
429 }
430
431 /*
432 * BytecodeInterpreter::run(interpreterState istate)
433 * BytecodeInterpreter::runWithChecks(interpreterState istate)
434 *
435 * The real deal. This is where byte codes actually get interpreted.
436 * Basically it's a big while loop that iterates until we return from
437 * the method passed in.
438 *
439 * The runWithChecks is used if JVMTI is enabled.
440 *
441 */
442 #if defined(VM_JVMTI)
443 void
444 BytecodeInterpreter::runWithChecks(interpreterState istate) {
445 #else
446 void
447 BytecodeInterpreter::run(interpreterState istate) {
448 #endif
449
450 // In order to simplify some tests based on switches set at runtime
451 // we invoke the interpreter a single time after switches are enabled
452 // and set simpler to to test variables rather than method calls or complex
453 // boolean expressions.
454
455 static int initialized = 0;
456 static int checkit = 0;
457 static intptr_t* c_addr = NULL;
458 static intptr_t c_value;
459
460 if (checkit && *c_addr != c_value) {
461 os::breakpoint();
462 }
463 #ifdef VM_JVMTI
464 static bool _jvmti_interp_events = 0;
465 #endif
466
467 static int _compiling; // (UseCompiler || CountCompiledCalls)
468
469 #ifdef ASSERT
470 if (istate->_msg != initialize) {
471 assert(abs(istate->_stack_base - istate->_stack_limit) == (istate->_method->max_stack() + 1), "bad stack limit");
472 #ifndef SHARK
473 IA32_ONLY(assert(istate->_stack_limit == istate->_thread->last_Java_sp() + 1, "wrong"));
474 #endif // !SHARK
475 }
476 // Verify linkages.
477 interpreterState l = istate;
478 do {
479 assert(l == l->_self_link, "bad link");
480 l = l->_prev_link;
481 } while (l != NULL);
482 // Screwups with stack management usually cause us to overwrite istate
483 // save a copy so we can verify it.
484 interpreterState orig = istate;
485 #endif
486
487 static volatile jbyte* _byte_map_base; // adjusted card table base for oop store barrier
488
489 register intptr_t* topOfStack = (intptr_t *)istate->stack(); /* access with STACK macros */
490 register address pc = istate->bcp();
491 register jubyte opcode;
492 register intptr_t* locals = istate->locals();
493 register constantPoolCacheOop cp = istate->constants(); // method()->constants()->cache()
494 #ifdef LOTS_OF_REGS
495 register JavaThread* THREAD = istate->thread();
496 register volatile jbyte* BYTE_MAP_BASE = _byte_map_base;
497 #else
498 #undef THREAD
499 #define THREAD istate->thread()
500 #undef BYTE_MAP_BASE
501 #define BYTE_MAP_BASE _byte_map_base
502 #endif
503
504 #ifdef USELABELS
505 const static void* const opclabels_data[256] = {
506 /* 0x00 */ &&opc_nop, &&opc_aconst_null,&&opc_iconst_m1,&&opc_iconst_0,
507 /* 0x04 */ &&opc_iconst_1,&&opc_iconst_2, &&opc_iconst_3, &&opc_iconst_4,
508 /* 0x08 */ &&opc_iconst_5,&&opc_lconst_0, &&opc_lconst_1, &&opc_fconst_0,
509 /* 0x0C */ &&opc_fconst_1,&&opc_fconst_2, &&opc_dconst_0, &&opc_dconst_1,
510
511 /* 0x10 */ &&opc_bipush, &&opc_sipush, &&opc_ldc, &&opc_ldc_w,
512 /* 0x14 */ &&opc_ldc2_w, &&opc_iload, &&opc_lload, &&opc_fload,
513 /* 0x18 */ &&opc_dload, &&opc_aload, &&opc_iload_0,&&opc_iload_1,
514 /* 0x1C */ &&opc_iload_2,&&opc_iload_3,&&opc_lload_0,&&opc_lload_1,
515
516 /* 0x20 */ &&opc_lload_2,&&opc_lload_3,&&opc_fload_0,&&opc_fload_1,
517 /* 0x24 */ &&opc_fload_2,&&opc_fload_3,&&opc_dload_0,&&opc_dload_1,
518 /* 0x28 */ &&opc_dload_2,&&opc_dload_3,&&opc_aload_0,&&opc_aload_1,
519 /* 0x2C */ &&opc_aload_2,&&opc_aload_3,&&opc_iaload, &&opc_laload,
520
521 /* 0x30 */ &&opc_faload, &&opc_daload, &&opc_aaload, &&opc_baload,
522 /* 0x34 */ &&opc_caload, &&opc_saload, &&opc_istore, &&opc_lstore,
523 /* 0x38 */ &&opc_fstore, &&opc_dstore, &&opc_astore, &&opc_istore_0,
524 /* 0x3C */ &&opc_istore_1,&&opc_istore_2,&&opc_istore_3,&&opc_lstore_0,
525
526 /* 0x40 */ &&opc_lstore_1,&&opc_lstore_2,&&opc_lstore_3,&&opc_fstore_0,
527 /* 0x44 */ &&opc_fstore_1,&&opc_fstore_2,&&opc_fstore_3,&&opc_dstore_0,
528 /* 0x48 */ &&opc_dstore_1,&&opc_dstore_2,&&opc_dstore_3,&&opc_astore_0,
529 /* 0x4C */ &&opc_astore_1,&&opc_astore_2,&&opc_astore_3,&&opc_iastore,
530
531 /* 0x50 */ &&opc_lastore,&&opc_fastore,&&opc_dastore,&&opc_aastore,
532 /* 0x54 */ &&opc_bastore,&&opc_castore,&&opc_sastore,&&opc_pop,
533 /* 0x58 */ &&opc_pop2, &&opc_dup, &&opc_dup_x1, &&opc_dup_x2,
534 /* 0x5C */ &&opc_dup2, &&opc_dup2_x1,&&opc_dup2_x2,&&opc_swap,
535
536 /* 0x60 */ &&opc_iadd,&&opc_ladd,&&opc_fadd,&&opc_dadd,
537 /* 0x64 */ &&opc_isub,&&opc_lsub,&&opc_fsub,&&opc_dsub,
538 /* 0x68 */ &&opc_imul,&&opc_lmul,&&opc_fmul,&&opc_dmul,
539 /* 0x6C */ &&opc_idiv,&&opc_ldiv,&&opc_fdiv,&&opc_ddiv,
540
541 /* 0x70 */ &&opc_irem, &&opc_lrem, &&opc_frem,&&opc_drem,
542 /* 0x74 */ &&opc_ineg, &&opc_lneg, &&opc_fneg,&&opc_dneg,
543 /* 0x78 */ &&opc_ishl, &&opc_lshl, &&opc_ishr,&&opc_lshr,
544 /* 0x7C */ &&opc_iushr,&&opc_lushr,&&opc_iand,&&opc_land,
545
546 /* 0x80 */ &&opc_ior, &&opc_lor,&&opc_ixor,&&opc_lxor,
547 /* 0x84 */ &&opc_iinc,&&opc_i2l,&&opc_i2f, &&opc_i2d,
548 /* 0x88 */ &&opc_l2i, &&opc_l2f,&&opc_l2d, &&opc_f2i,
549 /* 0x8C */ &&opc_f2l, &&opc_f2d,&&opc_d2i, &&opc_d2l,
550
551 /* 0x90 */ &&opc_d2f, &&opc_i2b, &&opc_i2c, &&opc_i2s,
552 /* 0x94 */ &&opc_lcmp, &&opc_fcmpl,&&opc_fcmpg,&&opc_dcmpl,
553 /* 0x98 */ &&opc_dcmpg,&&opc_ifeq, &&opc_ifne, &&opc_iflt,
554 /* 0x9C */ &&opc_ifge, &&opc_ifgt, &&opc_ifle, &&opc_if_icmpeq,
555
556 /* 0xA0 */ &&opc_if_icmpne,&&opc_if_icmplt,&&opc_if_icmpge, &&opc_if_icmpgt,
557 /* 0xA4 */ &&opc_if_icmple,&&opc_if_acmpeq,&&opc_if_acmpne, &&opc_goto,
558 /* 0xA8 */ &&opc_jsr, &&opc_ret, &&opc_tableswitch,&&opc_lookupswitch,
559 /* 0xAC */ &&opc_ireturn, &&opc_lreturn, &&opc_freturn, &&opc_dreturn,
560
561 /* 0xB0 */ &&opc_areturn, &&opc_return, &&opc_getstatic, &&opc_putstatic,
562 /* 0xB4 */ &&opc_getfield, &&opc_putfield, &&opc_invokevirtual,&&opc_invokespecial,
563 /* 0xB8 */ &&opc_invokestatic,&&opc_invokeinterface,&&opc_invokedynamic,&&opc_new,
564 /* 0xBC */ &&opc_newarray, &&opc_anewarray, &&opc_arraylength, &&opc_athrow,
565
566 /* 0xC0 */ &&opc_checkcast, &&opc_instanceof, &&opc_monitorenter, &&opc_monitorexit,
567 /* 0xC4 */ &&opc_wide, &&opc_multianewarray, &&opc_ifnull, &&opc_ifnonnull,
568 /* 0xC8 */ &&opc_goto_w, &&opc_jsr_w, &&opc_breakpoint, &&opc_default,
569 /* 0xCC */ &&opc_default, &&opc_default, &&opc_default, &&opc_default,
570
571 /* 0xD0 */ &&opc_default, &&opc_default, &&opc_default, &&opc_default,
572 /* 0xD4 */ &&opc_default, &&opc_default, &&opc_default, &&opc_default,
573 /* 0xD8 */ &&opc_default, &&opc_default, &&opc_default, &&opc_default,
574 /* 0xDC */ &&opc_default, &&opc_default, &&opc_default, &&opc_default,
575
576 /* 0xE0 */ &&opc_default, &&opc_default, &&opc_default, &&opc_default,
577 /* 0xE4 */ &&opc_default, &&opc_fast_aldc, &&opc_fast_aldc_w, &&opc_return_register_finalizer,
578 /* 0xE8 */ &&opc_default, &&opc_default, &&opc_default, &&opc_default,
579 /* 0xEC */ &&opc_default, &&opc_default, &&opc_default, &&opc_default,
580
581 /* 0xF0 */ &&opc_default, &&opc_default, &&opc_default, &&opc_default,
582 /* 0xF4 */ &&opc_default, &&opc_default, &&opc_default, &&opc_default,
583 /* 0xF8 */ &&opc_default, &&opc_default, &&opc_default, &&opc_default,
584 /* 0xFC */ &&opc_default, &&opc_default, &&opc_default, &&opc_default
585 };
586 register uintptr_t *dispatch_table = (uintptr_t*)&opclabels_data[0];
587 #endif /* USELABELS */
588
589 #ifdef ASSERT
590 // this will trigger a VERIFY_OOP on entry
591 if (istate->msg() != initialize && ! METHOD->is_static()) {
592 oop rcvr = LOCALS_OBJECT(0);
593 VERIFY_OOP(rcvr);
594 }
595 #endif
596 // #define HACK
597 #ifdef HACK
598 bool interesting = false;
599 #endif // HACK
600
601 /* QQQ this should be a stack method so we don't know actual direction */
602 guarantee(istate->msg() == initialize ||
603 topOfStack >= istate->stack_limit() &&
604 topOfStack < istate->stack_base(),
605 "Stack top out of range");
606
607 switch (istate->msg()) {
608 case initialize: {
609 if (initialized++) ShouldNotReachHere(); // Only one initialize call
610 _compiling = (UseCompiler || CountCompiledCalls);
611 #ifdef VM_JVMTI
612 _jvmti_interp_events = JvmtiExport::can_post_interpreter_events();
613 #endif
614 BarrierSet* bs = Universe::heap()->barrier_set();
615 assert(bs->kind() == BarrierSet::CardTableModRef, "Wrong barrier set kind");
616 _byte_map_base = (volatile jbyte*)(((CardTableModRefBS*)bs)->byte_map_base);
617 return;
618 }
619 break;
620 case method_entry: {
621 THREAD->set_do_not_unlock();
622 // count invocations
623 assert(initialized, "Interpreter not initialized");
624 if (_compiling) {
625 if (ProfileInterpreter) {
626 METHOD->increment_interpreter_invocation_count();
627 }
628 INCR_INVOCATION_COUNT;
629 if (INVOCATION_COUNT->reached_InvocationLimit()) {
630 CALL_VM((void)InterpreterRuntime::frequency_counter_overflow(THREAD, NULL), handle_exception);
631
632 // We no longer retry on a counter overflow
633
634 // istate->set_msg(retry_method);
635 // THREAD->clr_do_not_unlock();
636 // return;
637 }
638 SAFEPOINT;
639 }
640
641 if ((istate->_stack_base - istate->_stack_limit) != istate->method()->max_stack() + 1) {
642 // initialize
643 os::breakpoint();
644 }
645
646 #ifdef HACK
647 {
648 ResourceMark rm;
649 char *method_name = istate->method()->name_and_sig_as_C_string();
650 if (strstr(method_name, "runThese$TestRunner.run()V") != NULL) {
651 tty->print_cr("entering: depth %d bci: %d",
652 (istate->_stack_base - istate->_stack),
653 istate->_bcp - istate->_method->code_base());
654 interesting = true;
655 }
656 }
657 #endif // HACK
658
659
660 // lock method if synchronized
661 if (METHOD->is_synchronized()) {
662 // oop rcvr = locals[0].j.r;
663 oop rcvr;
664 if (METHOD->is_static()) {
665 rcvr = METHOD->constants()->pool_holder()->java_mirror();
666 } else {
667 rcvr = LOCALS_OBJECT(0);
668 VERIFY_OOP(rcvr);
669 }
670 // The initial monitor is ours for the taking
671 BasicObjectLock* mon = &istate->monitor_base()[-1];
672 oop monobj = mon->obj();
673 assert(mon->obj() == rcvr, "method monitor mis-initialized");
674
675 bool success = UseBiasedLocking;
676 if (UseBiasedLocking) {
677 markOop mark = rcvr->mark();
678 if (mark->has_bias_pattern()) {
679 // The bias pattern is present in the object's header. Need to check
680 // whether the bias owner and the epoch are both still current.
681 intptr_t xx = ((intptr_t) THREAD) ^ (intptr_t) mark;
682 xx = (intptr_t) rcvr->klass()->klass_part()->prototype_header() ^ xx;
683 intptr_t yy = (xx & ~((int) markOopDesc::age_mask_in_place));
684 if (yy != 0 ) {
685 // At this point we know that the header has the bias pattern and
686 // that we are not the bias owner in the current epoch. We need to
687 // figure out more details about the state of the header in order to
688 // know what operations can be legally performed on the object's
689 // header.
690
691 // If the low three bits in the xor result aren't clear, that means
692 // the prototype header is no longer biased and we have to revoke
693 // the bias on this object.
694
695 if (yy & markOopDesc::biased_lock_mask_in_place == 0 ) {
696 // Biasing is still enabled for this data type. See whether the
697 // epoch of the current bias is still valid, meaning that the epoch
698 // bits of the mark word are equal to the epoch bits of the
699 // prototype header. (Note that the prototype header's epoch bits
700 // only change at a safepoint.) If not, attempt to rebias the object
701 // toward the current thread. Note that we must be absolutely sure
702 // that the current epoch is invalid in order to do this because
703 // otherwise the manipulations it performs on the mark word are
704 // illegal.
705 if (yy & markOopDesc::epoch_mask_in_place == 0) {
706 // The epoch of the current bias is still valid but we know nothing
707 // about the owner; it might be set or it might be clear. Try to
708 // acquire the bias of the object using an atomic operation. If this
709 // fails we will go in to the runtime to revoke the object's bias.
710 // Note that we first construct the presumed unbiased header so we
711 // don't accidentally blow away another thread's valid bias.
712 intptr_t unbiased = (intptr_t) mark & (markOopDesc::biased_lock_mask_in_place |
713 markOopDesc::age_mask_in_place |
714 markOopDesc::epoch_mask_in_place);
715 if (Atomic::cmpxchg_ptr((intptr_t)THREAD | unbiased, (intptr_t*) rcvr->mark_addr(), unbiased) != unbiased) {
716 CALL_VM(InterpreterRuntime::monitorenter(THREAD, mon), handle_exception);
717 }
718 } else {
719 try_rebias:
720 // At this point we know the epoch has expired, meaning that the
721 // current "bias owner", if any, is actually invalid. Under these
722 // circumstances _only_, we are allowed to use the current header's
723 // value as the comparison value when doing the cas to acquire the
724 // bias in the current epoch. In other words, we allow transfer of
725 // the bias from one thread to another directly in this situation.
726 xx = (intptr_t) rcvr->klass()->klass_part()->prototype_header() | (intptr_t) THREAD;
727 if (Atomic::cmpxchg_ptr((intptr_t)THREAD | (intptr_t) rcvr->klass()->klass_part()->prototype_header(),
728 (intptr_t*) rcvr->mark_addr(),
729 (intptr_t) mark) != (intptr_t) mark) {
730 CALL_VM(InterpreterRuntime::monitorenter(THREAD, mon), handle_exception);
731 }
732 }
733 } else {
734 try_revoke_bias:
735 // The prototype mark in the klass doesn't have the bias bit set any
736 // more, indicating that objects of this data type are not supposed
737 // to be biased any more. We are going to try to reset the mark of
738 // this object to the prototype value and fall through to the
739 // CAS-based locking scheme. Note that if our CAS fails, it means
740 // that another thread raced us for the privilege of revoking the
741 // bias of this particular object, so it's okay to continue in the
742 // normal locking code.
743 //
744 xx = (intptr_t) rcvr->klass()->klass_part()->prototype_header() | (intptr_t) THREAD;
745 if (Atomic::cmpxchg_ptr(rcvr->klass()->klass_part()->prototype_header(),
746 (intptr_t*) rcvr->mark_addr(),
747 mark) == mark) {
748 // (*counters->revoked_lock_entry_count_addr())++;
749 success = false;
750 }
751 }
752 }
753 } else {
754 cas_label:
755 success = false;
756 }
757 }
758 if (!success) {
759 markOop displaced = rcvr->mark()->set_unlocked();
760 mon->lock()->set_displaced_header(displaced);
761 if (Atomic::cmpxchg_ptr(mon, rcvr->mark_addr(), displaced) != displaced) {
762 // Is it simple recursive case?
763 if (THREAD->is_lock_owned((address) displaced->clear_lock_bits())) {
764 mon->lock()->set_displaced_header(NULL);
765 } else {
766 CALL_VM(InterpreterRuntime::monitorenter(THREAD, mon), handle_exception);
767 }
768 }
769 }
770 }
771 THREAD->clr_do_not_unlock();
772
773 // Notify jvmti
774 #ifdef VM_JVMTI
775 if (_jvmti_interp_events) {
776 // Whenever JVMTI puts a thread in interp_only_mode, method
777 // entry/exit events are sent for that thread to track stack depth.
778 if (THREAD->is_interp_only_mode()) {
779 CALL_VM(InterpreterRuntime::post_method_entry(THREAD),
780 handle_exception);
781 }
782 }
783 #endif /* VM_JVMTI */
784
785 goto run;
786 }
787
788 case popping_frame: {
789 // returned from a java call to pop the frame, restart the call
790 // clear the message so we don't confuse ourselves later
791 ShouldNotReachHere(); // we don't return this.
792 assert(THREAD->pop_frame_in_process(), "wrong frame pop state");
793 istate->set_msg(no_request);
794 THREAD->clr_pop_frame_in_process();
795 goto run;
796 }
797
798 case method_resume: {
799 if ((istate->_stack_base - istate->_stack_limit) != istate->method()->max_stack() + 1) {
800 // resume
801 os::breakpoint();
802 }
803 #ifdef HACK
804 {
805 ResourceMark rm;
806 char *method_name = istate->method()->name_and_sig_as_C_string();
807 if (strstr(method_name, "runThese$TestRunner.run()V") != NULL) {
808 tty->print_cr("resume: depth %d bci: %d",
809 (istate->_stack_base - istate->_stack) ,
810 istate->_bcp - istate->_method->code_base());
811 interesting = true;
812 }
813 }
814 #endif // HACK
815 // returned from a java call, continue executing.
816 if (THREAD->pop_frame_pending() && !THREAD->pop_frame_in_process()) {
817 goto handle_Pop_Frame;
818 }
819
820 if (THREAD->has_pending_exception()) goto handle_exception;
821 // Update the pc by the saved amount of the invoke bytecode size
822 UPDATE_PC(istate->bcp_advance());
823 goto run;
824 }
825
826 case deopt_resume2: {
827 // Returned from an opcode that will reexecute. Deopt was
828 // a result of a PopFrame request.
829 //
830 goto run;
831 }
832
833 case deopt_resume: {
834 // Returned from an opcode that has completed. The stack has
835 // the result all we need to do is skip across the bytecode
836 // and continue (assuming there is no exception pending)
837 //
838 // compute continuation length
839 //
840 // Note: it is possible to deopt at a return_register_finalizer opcode
841 // because this requires entering the vm to do the registering. While the
842 // opcode is complete we can't advance because there are no more opcodes
843 // much like trying to deopt at a poll return. In that has we simply
844 // get out of here
845 //
846 if ( Bytecodes::code_at(METHOD, pc) == Bytecodes::_return_register_finalizer) {
847 // this will do the right thing even if an exception is pending.
848 goto handle_return;
849 }
850 UPDATE_PC(Bytecodes::length_at(METHOD, pc));
851 if (THREAD->has_pending_exception()) goto handle_exception;
852 goto run;
853 }
854 case got_monitors: {
855 // continue locking now that we have a monitor to use
856 // we expect to find newly allocated monitor at the "top" of the monitor stack.
857 oop lockee = STACK_OBJECT(-1);
858 VERIFY_OOP(lockee);
859 // derefing's lockee ought to provoke implicit null check
860 // find a free monitor
861 BasicObjectLock* entry = (BasicObjectLock*) istate->stack_base();
862 assert(entry->obj() == NULL, "Frame manager didn't allocate the monitor");
863 entry->set_obj(lockee);
864
865 markOop displaced = lockee->mark()->set_unlocked();
866 entry->lock()->set_displaced_header(displaced);
867 if (Atomic::cmpxchg_ptr(entry, lockee->mark_addr(), displaced) != displaced) {
868 // Is it simple recursive case?
869 if (THREAD->is_lock_owned((address) displaced->clear_lock_bits())) {
870 entry->lock()->set_displaced_header(NULL);
871 } else {
872 CALL_VM(InterpreterRuntime::monitorenter(THREAD, entry), handle_exception);
873 }
874 }
875 UPDATE_PC_AND_TOS(1, -1);
876 goto run;
877 }
878 default: {
879 fatal("Unexpected message from frame manager");
880 }
881 }
882
883 run:
884
885 DO_UPDATE_INSTRUCTION_COUNT(*pc)
886 DEBUGGER_SINGLE_STEP_NOTIFY();
887 #ifdef PREFETCH_OPCCODE
888 opcode = *pc; /* prefetch first opcode */
889 #endif
890
891 #ifndef USELABELS
892 while (1)
893 #endif
894 {
895 #ifndef PREFETCH_OPCCODE
896 opcode = *pc;
897 #endif
898 // Seems like this happens twice per opcode. At worst this is only
899 // need at entry to the loop.
900 // DEBUGGER_SINGLE_STEP_NOTIFY();
901 /* Using this labels avoids double breakpoints when quickening and
902 * when returing from transition frames.
903 */
904 opcode_switch:
905 assert(istate == orig, "Corrupted istate");
906 /* QQQ Hmm this has knowledge of direction, ought to be a stack method */
907 assert(topOfStack >= istate->stack_limit(), "Stack overrun");
908 assert(topOfStack < istate->stack_base(), "Stack underrun");
909
910 #ifdef USELABELS
911 DISPATCH(opcode);
912 #else
913 switch (opcode)
914 #endif
915 {
916 CASE(_nop):
917 UPDATE_PC_AND_CONTINUE(1);
918
919 /* Push miscellaneous constants onto the stack. */
920
921 CASE(_aconst_null):
922 SET_STACK_OBJECT(NULL, 0);
923 UPDATE_PC_AND_TOS_AND_CONTINUE(1, 1);
924
925 #undef OPC_CONST_n
926 #define OPC_CONST_n(opcode, const_type, value) \
927 CASE(opcode): \
928 SET_STACK_ ## const_type(value, 0); \
929 UPDATE_PC_AND_TOS_AND_CONTINUE(1, 1);
930
931 OPC_CONST_n(_iconst_m1, INT, -1);
932 OPC_CONST_n(_iconst_0, INT, 0);
933 OPC_CONST_n(_iconst_1, INT, 1);
934 OPC_CONST_n(_iconst_2, INT, 2);
935 OPC_CONST_n(_iconst_3, INT, 3);
936 OPC_CONST_n(_iconst_4, INT, 4);
937 OPC_CONST_n(_iconst_5, INT, 5);
938 OPC_CONST_n(_fconst_0, FLOAT, 0.0);
939 OPC_CONST_n(_fconst_1, FLOAT, 1.0);
940 OPC_CONST_n(_fconst_2, FLOAT, 2.0);
941
942 #undef OPC_CONST2_n
943 #define OPC_CONST2_n(opcname, value, key, kind) \
944 CASE(_##opcname): \
945 { \
946 SET_STACK_ ## kind(VM##key##Const##value(), 1); \
947 UPDATE_PC_AND_TOS_AND_CONTINUE(1, 2); \
948 }
949 OPC_CONST2_n(dconst_0, Zero, double, DOUBLE);
950 OPC_CONST2_n(dconst_1, One, double, DOUBLE);
951 OPC_CONST2_n(lconst_0, Zero, long, LONG);
952 OPC_CONST2_n(lconst_1, One, long, LONG);
953
954 /* Load constant from constant pool: */
955
956 /* Push a 1-byte signed integer value onto the stack. */
957 CASE(_bipush):
958 SET_STACK_INT((jbyte)(pc[1]), 0);
959 UPDATE_PC_AND_TOS_AND_CONTINUE(2, 1);
960
961 /* Push a 2-byte signed integer constant onto the stack. */
962 CASE(_sipush):
963 SET_STACK_INT((int16_t)Bytes::get_Java_u2(pc + 1), 0);
964 UPDATE_PC_AND_TOS_AND_CONTINUE(3, 1);
965
966 /* load from local variable */
967
968 CASE(_aload):
969 VERIFY_OOP(LOCALS_OBJECT(pc[1]));
970 SET_STACK_OBJECT(LOCALS_OBJECT(pc[1]), 0);
971 UPDATE_PC_AND_TOS_AND_CONTINUE(2, 1);
972
973 CASE(_iload):
974 CASE(_fload):
975 SET_STACK_SLOT(LOCALS_SLOT(pc[1]), 0);
976 UPDATE_PC_AND_TOS_AND_CONTINUE(2, 1);
977
978 CASE(_lload):
979 SET_STACK_LONG_FROM_ADDR(LOCALS_LONG_AT(pc[1]), 1);
980 UPDATE_PC_AND_TOS_AND_CONTINUE(2, 2);
981
982 CASE(_dload):
983 SET_STACK_DOUBLE_FROM_ADDR(LOCALS_DOUBLE_AT(pc[1]), 1);
984 UPDATE_PC_AND_TOS_AND_CONTINUE(2, 2);
985
986 #undef OPC_LOAD_n
987 #define OPC_LOAD_n(num) \
988 CASE(_aload_##num): \
989 VERIFY_OOP(LOCALS_OBJECT(num)); \
990 SET_STACK_OBJECT(LOCALS_OBJECT(num), 0); \
991 UPDATE_PC_AND_TOS_AND_CONTINUE(1, 1); \
992 \
993 CASE(_iload_##num): \
994 CASE(_fload_##num): \
995 SET_STACK_SLOT(LOCALS_SLOT(num), 0); \
996 UPDATE_PC_AND_TOS_AND_CONTINUE(1, 1); \
997 \
998 CASE(_lload_##num): \
999 SET_STACK_LONG_FROM_ADDR(LOCALS_LONG_AT(num), 1); \
1000 UPDATE_PC_AND_TOS_AND_CONTINUE(1, 2); \
1001 CASE(_dload_##num): \
1002 SET_STACK_DOUBLE_FROM_ADDR(LOCALS_DOUBLE_AT(num), 1); \
1003 UPDATE_PC_AND_TOS_AND_CONTINUE(1, 2);
1004
1005 OPC_LOAD_n(0);
1006 OPC_LOAD_n(1);
1007 OPC_LOAD_n(2);
1008 OPC_LOAD_n(3);
1009
1010 /* store to a local variable */
1011
1012 CASE(_astore):
1013 astore(topOfStack, -1, locals, pc[1]);
1014 UPDATE_PC_AND_TOS_AND_CONTINUE(2, -1);
1015
1016 CASE(_istore):
1017 CASE(_fstore):
1018 SET_LOCALS_SLOT(STACK_SLOT(-1), pc[1]);
1019 UPDATE_PC_AND_TOS_AND_CONTINUE(2, -1);
1020
1021 CASE(_lstore):
1022 SET_LOCALS_LONG(STACK_LONG(-1), pc[1]);
1023 UPDATE_PC_AND_TOS_AND_CONTINUE(2, -2);
1024
1025 CASE(_dstore):
1026 SET_LOCALS_DOUBLE(STACK_DOUBLE(-1), pc[1]);
1027 UPDATE_PC_AND_TOS_AND_CONTINUE(2, -2);
1028
1029 CASE(_wide): {
1030 uint16_t reg = Bytes::get_Java_u2(pc + 2);
1031
1032 opcode = pc[1];
1033 switch(opcode) {
1034 case Bytecodes::_aload:
1035 VERIFY_OOP(LOCALS_OBJECT(reg));
1036 SET_STACK_OBJECT(LOCALS_OBJECT(reg), 0);
1037 UPDATE_PC_AND_TOS_AND_CONTINUE(4, 1);
1038
1039 case Bytecodes::_iload:
1040 case Bytecodes::_fload:
1041 SET_STACK_SLOT(LOCALS_SLOT(reg), 0);
1042 UPDATE_PC_AND_TOS_AND_CONTINUE(4, 1);
1043
1044 case Bytecodes::_lload:
1045 SET_STACK_LONG_FROM_ADDR(LOCALS_LONG_AT(reg), 1);
1046 UPDATE_PC_AND_TOS_AND_CONTINUE(4, 2);
1047
1048 case Bytecodes::_dload:
1049 SET_STACK_DOUBLE_FROM_ADDR(LOCALS_LONG_AT(reg), 1);
1050 UPDATE_PC_AND_TOS_AND_CONTINUE(4, 2);
1051
1052 case Bytecodes::_astore:
1053 astore(topOfStack, -1, locals, reg);
1054 UPDATE_PC_AND_TOS_AND_CONTINUE(4, -1);
1055
1056 case Bytecodes::_istore:
1057 case Bytecodes::_fstore:
1058 SET_LOCALS_SLOT(STACK_SLOT(-1), reg);
1059 UPDATE_PC_AND_TOS_AND_CONTINUE(4, -1);
1060
1061 case Bytecodes::_lstore:
1062 SET_LOCALS_LONG(STACK_LONG(-1), reg);
1063 UPDATE_PC_AND_TOS_AND_CONTINUE(4, -2);
1064
1065 case Bytecodes::_dstore:
1066 SET_LOCALS_DOUBLE(STACK_DOUBLE(-1), reg);
1067 UPDATE_PC_AND_TOS_AND_CONTINUE(4, -2);
1068
1069 case Bytecodes::_iinc: {
1070 int16_t offset = (int16_t)Bytes::get_Java_u2(pc+4);
1071 // Be nice to see what this generates.... QQQ
1072 SET_LOCALS_INT(LOCALS_INT(reg) + offset, reg);
1073 UPDATE_PC_AND_CONTINUE(6);
1074 }
1075 case Bytecodes::_ret:
1076 pc = istate->method()->code_base() + (intptr_t)(LOCALS_ADDR(reg));
1077 UPDATE_PC_AND_CONTINUE(0);
1078 default:
1079 VM_JAVA_ERROR(vmSymbols::java_lang_InternalError(), "undefined opcode");
1080 }
1081 }
1082
1083
1084 #undef OPC_STORE_n
1085 #define OPC_STORE_n(num) \
1086 CASE(_astore_##num): \
1087 astore(topOfStack, -1, locals, num); \
1088 UPDATE_PC_AND_TOS_AND_CONTINUE(1, -1); \
1089 CASE(_istore_##num): \
1090 CASE(_fstore_##num): \
1091 SET_LOCALS_SLOT(STACK_SLOT(-1), num); \
1092 UPDATE_PC_AND_TOS_AND_CONTINUE(1, -1);
1093
1094 OPC_STORE_n(0);
1095 OPC_STORE_n(1);
1096 OPC_STORE_n(2);
1097 OPC_STORE_n(3);
1098
1099 #undef OPC_DSTORE_n
1100 #define OPC_DSTORE_n(num) \
1101 CASE(_dstore_##num): \
1102 SET_LOCALS_DOUBLE(STACK_DOUBLE(-1), num); \
1103 UPDATE_PC_AND_TOS_AND_CONTINUE(1, -2); \
1104 CASE(_lstore_##num): \
1105 SET_LOCALS_LONG(STACK_LONG(-1), num); \
1106 UPDATE_PC_AND_TOS_AND_CONTINUE(1, -2);
1107
1108 OPC_DSTORE_n(0);
1109 OPC_DSTORE_n(1);
1110 OPC_DSTORE_n(2);
1111 OPC_DSTORE_n(3);
1112
1113 /* stack pop, dup, and insert opcodes */
1114
1115
1116 CASE(_pop): /* Discard the top item on the stack */
1117 UPDATE_PC_AND_TOS_AND_CONTINUE(1, -1);
1118
1119
1120 CASE(_pop2): /* Discard the top 2 items on the stack */
1121 UPDATE_PC_AND_TOS_AND_CONTINUE(1, -2);
1122
1123
1124 CASE(_dup): /* Duplicate the top item on the stack */
1125 dup(topOfStack);
1126 UPDATE_PC_AND_TOS_AND_CONTINUE(1, 1);
1127
1128 CASE(_dup2): /* Duplicate the top 2 items on the stack */
1129 dup2(topOfStack);
1130 UPDATE_PC_AND_TOS_AND_CONTINUE(1, 2);
1131
1132 CASE(_dup_x1): /* insert top word two down */
1133 dup_x1(topOfStack);
1134 UPDATE_PC_AND_TOS_AND_CONTINUE(1, 1);
1135
1136 CASE(_dup_x2): /* insert top word three down */
1137 dup_x2(topOfStack);
1138 UPDATE_PC_AND_TOS_AND_CONTINUE(1, 1);
1139
1140 CASE(_dup2_x1): /* insert top 2 slots three down */
1141 dup2_x1(topOfStack);
1142 UPDATE_PC_AND_TOS_AND_CONTINUE(1, 2);
1143
1144 CASE(_dup2_x2): /* insert top 2 slots four down */
1145 dup2_x2(topOfStack);
1146 UPDATE_PC_AND_TOS_AND_CONTINUE(1, 2);
1147
1148 CASE(_swap): { /* swap top two elements on the stack */
1149 swap(topOfStack);
1150 UPDATE_PC_AND_CONTINUE(1);
1151 }
1152
1153 /* Perform various binary integer operations */
1154
1155 #undef OPC_INT_BINARY
1156 #define OPC_INT_BINARY(opcname, opname, test) \
1157 CASE(_i##opcname): \
1158 if (test && (STACK_INT(-1) == 0)) { \
1159 VM_JAVA_ERROR(vmSymbols::java_lang_ArithmeticException(), \
1160 "/ by zero"); \
1161 } \
1162 SET_STACK_INT(VMint##opname(STACK_INT(-2), \
1163 STACK_INT(-1)), \
1164 -2); \
1165 UPDATE_PC_AND_TOS_AND_CONTINUE(1, -1); \
1166 CASE(_l##opcname): \
1167 { \
1168 if (test) { \
1169 jlong l1 = STACK_LONG(-1); \
1170 if (VMlongEqz(l1)) { \
1171 VM_JAVA_ERROR(vmSymbols::java_lang_ArithmeticException(), \
1172 "/ by long zero"); \
1173 } \
1174 } \
1175 /* First long at (-1,-2) next long at (-3,-4) */ \
1176 SET_STACK_LONG(VMlong##opname(STACK_LONG(-3), \
1177 STACK_LONG(-1)), \
1178 -3); \
1179 UPDATE_PC_AND_TOS_AND_CONTINUE(1, -2); \
1180 }
1181
1182 OPC_INT_BINARY(add, Add, 0);
1183 OPC_INT_BINARY(sub, Sub, 0);
1184 OPC_INT_BINARY(mul, Mul, 0);
1185 OPC_INT_BINARY(and, And, 0);
1186 OPC_INT_BINARY(or, Or, 0);
1187 OPC_INT_BINARY(xor, Xor, 0);
1188 OPC_INT_BINARY(div, Div, 1);
1189 OPC_INT_BINARY(rem, Rem, 1);
1190
1191
1192 /* Perform various binary floating number operations */
1193 /* On some machine/platforms/compilers div zero check can be implicit */
1194
1195 #undef OPC_FLOAT_BINARY
1196 #define OPC_FLOAT_BINARY(opcname, opname) \
1197 CASE(_d##opcname): { \
1198 SET_STACK_DOUBLE(VMdouble##opname(STACK_DOUBLE(-3), \
1199 STACK_DOUBLE(-1)), \
1200 -3); \
1201 UPDATE_PC_AND_TOS_AND_CONTINUE(1, -2); \
1202 } \
1203 CASE(_f##opcname): \
1204 SET_STACK_FLOAT(VMfloat##opname(STACK_FLOAT(-2), \
1205 STACK_FLOAT(-1)), \
1206 -2); \
1207 UPDATE_PC_AND_TOS_AND_CONTINUE(1, -1);
1208
1209
1210 OPC_FLOAT_BINARY(add, Add);
1211 OPC_FLOAT_BINARY(sub, Sub);
1212 OPC_FLOAT_BINARY(mul, Mul);
1213 OPC_FLOAT_BINARY(div, Div);
1214 OPC_FLOAT_BINARY(rem, Rem);
1215
1216 /* Shift operations
1217 * Shift left int and long: ishl, lshl
1218 * Logical shift right int and long w/zero extension: iushr, lushr
1219 * Arithmetic shift right int and long w/sign extension: ishr, lshr
1220 */
1221
1222 #undef OPC_SHIFT_BINARY
1223 #define OPC_SHIFT_BINARY(opcname, opname) \
1224 CASE(_i##opcname): \
1225 SET_STACK_INT(VMint##opname(STACK_INT(-2), \
1226 STACK_INT(-1)), \
1227 -2); \
1228 UPDATE_PC_AND_TOS_AND_CONTINUE(1, -1); \
1229 CASE(_l##opcname): \
1230 { \
1231 SET_STACK_LONG(VMlong##opname(STACK_LONG(-2), \
1232 STACK_INT(-1)), \
1233 -2); \
1234 UPDATE_PC_AND_TOS_AND_CONTINUE(1, -1); \
1235 }
1236
1237 OPC_SHIFT_BINARY(shl, Shl);
1238 OPC_SHIFT_BINARY(shr, Shr);
1239 OPC_SHIFT_BINARY(ushr, Ushr);
1240
1241 /* Increment local variable by constant */
1242 CASE(_iinc):
1243 {
1244 // locals[pc[1]].j.i += (jbyte)(pc[2]);
1245 SET_LOCALS_INT(LOCALS_INT(pc[1]) + (jbyte)(pc[2]), pc[1]);
1246 UPDATE_PC_AND_CONTINUE(3);
1247 }
1248
1249 /* negate the value on the top of the stack */
1250
1251 CASE(_ineg):
1252 SET_STACK_INT(VMintNeg(STACK_INT(-1)), -1);
1253 UPDATE_PC_AND_CONTINUE(1);
1254
1255 CASE(_fneg):
1256 SET_STACK_FLOAT(VMfloatNeg(STACK_FLOAT(-1)), -1);
1257 UPDATE_PC_AND_CONTINUE(1);
1258
1259 CASE(_lneg):
1260 {
1261 SET_STACK_LONG(VMlongNeg(STACK_LONG(-1)), -1);
1262 UPDATE_PC_AND_CONTINUE(1);
1263 }
1264
1265 CASE(_dneg):
1266 {
1267 SET_STACK_DOUBLE(VMdoubleNeg(STACK_DOUBLE(-1)), -1);
1268 UPDATE_PC_AND_CONTINUE(1);
1269 }
1270
1271 /* Conversion operations */
1272
1273 CASE(_i2f): /* convert top of stack int to float */
1274 SET_STACK_FLOAT(VMint2Float(STACK_INT(-1)), -1);
1275 UPDATE_PC_AND_CONTINUE(1);
1276
1277 CASE(_i2l): /* convert top of stack int to long */
1278 {
1279 // this is ugly QQQ
1280 jlong r = VMint2Long(STACK_INT(-1));
1281 MORE_STACK(-1); // Pop
1282 SET_STACK_LONG(r, 1);
1283
1284 UPDATE_PC_AND_TOS_AND_CONTINUE(1, 2);
1285 }
1286
1287 CASE(_i2d): /* convert top of stack int to double */
1288 {
1289 // this is ugly QQQ (why cast to jlong?? )
1290 jdouble r = (jlong)STACK_INT(-1);
1291 MORE_STACK(-1); // Pop
1292 SET_STACK_DOUBLE(r, 1);
1293
1294 UPDATE_PC_AND_TOS_AND_CONTINUE(1, 2);
1295 }
1296
1297 CASE(_l2i): /* convert top of stack long to int */
1298 {
1299 jint r = VMlong2Int(STACK_LONG(-1));
1300 MORE_STACK(-2); // Pop
1301 SET_STACK_INT(r, 0);
1302 UPDATE_PC_AND_TOS_AND_CONTINUE(1, 1);
1303 }
1304
1305 CASE(_l2f): /* convert top of stack long to float */
1306 {
1307 jlong r = STACK_LONG(-1);
1308 MORE_STACK(-2); // Pop
1309 SET_STACK_FLOAT(VMlong2Float(r), 0);
1310 UPDATE_PC_AND_TOS_AND_CONTINUE(1, 1);
1311 }
1312
1313 CASE(_l2d): /* convert top of stack long to double */
1314 {
1315 jlong r = STACK_LONG(-1);
1316 MORE_STACK(-2); // Pop
1317 SET_STACK_DOUBLE(VMlong2Double(r), 1);
1318 UPDATE_PC_AND_TOS_AND_CONTINUE(1, 2);
1319 }
1320
1321 CASE(_f2i): /* Convert top of stack float to int */
1322 SET_STACK_INT(SharedRuntime::f2i(STACK_FLOAT(-1)), -1);
1323 UPDATE_PC_AND_CONTINUE(1);
1324
1325 CASE(_f2l): /* convert top of stack float to long */
1326 {
1327 jlong r = SharedRuntime::f2l(STACK_FLOAT(-1));
1328 MORE_STACK(-1); // POP
1329 SET_STACK_LONG(r, 1);
1330 UPDATE_PC_AND_TOS_AND_CONTINUE(1, 2);
1331 }
1332
1333 CASE(_f2d): /* convert top of stack float to double */
1334 {
1335 jfloat f;
1336 jdouble r;
1337 f = STACK_FLOAT(-1);
1338 r = (jdouble) f;
1339 MORE_STACK(-1); // POP
1340 SET_STACK_DOUBLE(r, 1);
1341 UPDATE_PC_AND_TOS_AND_CONTINUE(1, 2);
1342 }
1343
1344 CASE(_d2i): /* convert top of stack double to int */
1345 {
1346 jint r1 = SharedRuntime::d2i(STACK_DOUBLE(-1));
1347 MORE_STACK(-2);
1348 SET_STACK_INT(r1, 0);
1349 UPDATE_PC_AND_TOS_AND_CONTINUE(1, 1);
1350 }
1351
1352 CASE(_d2f): /* convert top of stack double to float */
1353 {
1354 jfloat r1 = VMdouble2Float(STACK_DOUBLE(-1));
1355 MORE_STACK(-2);
1356 SET_STACK_FLOAT(r1, 0);
1357 UPDATE_PC_AND_TOS_AND_CONTINUE(1, 1);
1358 }
1359
1360 CASE(_d2l): /* convert top of stack double to long */
1361 {
1362 jlong r1 = SharedRuntime::d2l(STACK_DOUBLE(-1));
1363 MORE_STACK(-2);
1364 SET_STACK_LONG(r1, 1);
1365 UPDATE_PC_AND_TOS_AND_CONTINUE(1, 2);
1366 }
1367
1368 CASE(_i2b):
1369 SET_STACK_INT(VMint2Byte(STACK_INT(-1)), -1);
1370 UPDATE_PC_AND_CONTINUE(1);
1371
1372 CASE(_i2c):
1373 SET_STACK_INT(VMint2Char(STACK_INT(-1)), -1);
1374 UPDATE_PC_AND_CONTINUE(1);
1375
1376 CASE(_i2s):
1377 SET_STACK_INT(VMint2Short(STACK_INT(-1)), -1);
1378 UPDATE_PC_AND_CONTINUE(1);
1379
1380 /* comparison operators */
1381
1382
1383 #define COMPARISON_OP(name, comparison) \
1384 CASE(_if_icmp##name): { \
1385 int skip = (STACK_INT(-2) comparison STACK_INT(-1)) \
1386 ? (int16_t)Bytes::get_Java_u2(pc + 1) : 3; \
1387 address branch_pc = pc; \
1388 UPDATE_PC_AND_TOS(skip, -2); \
1389 DO_BACKEDGE_CHECKS(skip, branch_pc); \
1390 CONTINUE; \
1391 } \
1392 CASE(_if##name): { \
1393 int skip = (STACK_INT(-1) comparison 0) \
1394 ? (int16_t)Bytes::get_Java_u2(pc + 1) : 3; \
1395 address branch_pc = pc; \
1396 UPDATE_PC_AND_TOS(skip, -1); \
1397 DO_BACKEDGE_CHECKS(skip, branch_pc); \
1398 CONTINUE; \
1399 }
1400
1401 #define COMPARISON_OP2(name, comparison) \
1402 COMPARISON_OP(name, comparison) \
1403 CASE(_if_acmp##name): { \
1404 int skip = (STACK_OBJECT(-2) comparison STACK_OBJECT(-1)) \
1405 ? (int16_t)Bytes::get_Java_u2(pc + 1) : 3; \
1406 address branch_pc = pc; \
1407 UPDATE_PC_AND_TOS(skip, -2); \
1408 DO_BACKEDGE_CHECKS(skip, branch_pc); \
1409 CONTINUE; \
1410 }
1411
1412 #define NULL_COMPARISON_NOT_OP(name) \
1413 CASE(_if##name): { \
1414 int skip = (!(STACK_OBJECT(-1) == NULL)) \
1415 ? (int16_t)Bytes::get_Java_u2(pc + 1) : 3; \
1416 address branch_pc = pc; \
1417 UPDATE_PC_AND_TOS(skip, -1); \
1418 DO_BACKEDGE_CHECKS(skip, branch_pc); \
1419 CONTINUE; \
1420 }
1421
1422 #define NULL_COMPARISON_OP(name) \
1423 CASE(_if##name): { \
1424 int skip = ((STACK_OBJECT(-1) == NULL)) \
1425 ? (int16_t)Bytes::get_Java_u2(pc + 1) : 3; \
1426 address branch_pc = pc; \
1427 UPDATE_PC_AND_TOS(skip, -1); \
1428 DO_BACKEDGE_CHECKS(skip, branch_pc); \
1429 CONTINUE; \
1430 }
1431 COMPARISON_OP(lt, <);
1432 COMPARISON_OP(gt, >);
1433 COMPARISON_OP(le, <=);
1434 COMPARISON_OP(ge, >=);
1435 COMPARISON_OP2(eq, ==); /* include ref comparison */
1436 COMPARISON_OP2(ne, !=); /* include ref comparison */
1437 NULL_COMPARISON_OP(null);
1438 NULL_COMPARISON_NOT_OP(nonnull);
1439
1440 /* Goto pc at specified offset in switch table. */
1441
1442 CASE(_tableswitch): {
1443 jint* lpc = (jint*)VMalignWordUp(pc+1);
1444 int32_t key = STACK_INT(-1);
1445 int32_t low = Bytes::get_Java_u4((address)&lpc[1]);
1446 int32_t high = Bytes::get_Java_u4((address)&lpc[2]);
1447 int32_t skip;
1448 key -= low;
1449 skip = ((uint32_t) key > (uint32_t)(high - low))
1450 ? Bytes::get_Java_u4((address)&lpc[0])
1451 : Bytes::get_Java_u4((address)&lpc[key + 3]);
1452 // Does this really need a full backedge check (osr?)
1453 address branch_pc = pc;
1454 UPDATE_PC_AND_TOS(skip, -1);
1455 DO_BACKEDGE_CHECKS(skip, branch_pc);
1456 CONTINUE;
1457 }
1458
1459 /* Goto pc whose table entry matches specified key */
1460
1461 CASE(_lookupswitch): {
1462 jint* lpc = (jint*)VMalignWordUp(pc+1);
1463 int32_t key = STACK_INT(-1);
1464 int32_t skip = Bytes::get_Java_u4((address) lpc); /* default amount */
1465 int32_t npairs = Bytes::get_Java_u4((address) &lpc[1]);
1466 while (--npairs >= 0) {
1467 lpc += 2;
1468 if (key == (int32_t)Bytes::get_Java_u4((address)lpc)) {
1469 skip = Bytes::get_Java_u4((address)&lpc[1]);
1470 break;
1471 }
1472 }
1473 address branch_pc = pc;
1474 UPDATE_PC_AND_TOS(skip, -1);
1475 DO_BACKEDGE_CHECKS(skip, branch_pc);
1476 CONTINUE;
1477 }
1478
1479 CASE(_fcmpl):
1480 CASE(_fcmpg):
1481 {
1482 SET_STACK_INT(VMfloatCompare(STACK_FLOAT(-2),
1483 STACK_FLOAT(-1),
1484 (opcode == Bytecodes::_fcmpl ? -1 : 1)),
1485 -2);
1486 UPDATE_PC_AND_TOS_AND_CONTINUE(1, -1);
1487 }
1488
1489 CASE(_dcmpl):
1490 CASE(_dcmpg):
1491 {
1492 int r = VMdoubleCompare(STACK_DOUBLE(-3),
1493 STACK_DOUBLE(-1),
1494 (opcode == Bytecodes::_dcmpl ? -1 : 1));
1495 MORE_STACK(-4); // Pop
1496 SET_STACK_INT(r, 0);
1497 UPDATE_PC_AND_TOS_AND_CONTINUE(1, 1);
1498 }
1499
1500 CASE(_lcmp):
1501 {
1502 int r = VMlongCompare(STACK_LONG(-3), STACK_LONG(-1));
1503 MORE_STACK(-4);
1504 SET_STACK_INT(r, 0);
1505 UPDATE_PC_AND_TOS_AND_CONTINUE(1, 1);
1506 }
1507
1508
1509 /* Return from a method */
1510
1511 CASE(_areturn):
1512 CASE(_ireturn):
1513 CASE(_freturn):
1514 {
1515 // Allow a safepoint before returning to frame manager.
1516 SAFEPOINT;
1517
1518 goto handle_return;
1519 }
1520
1521 CASE(_lreturn):
1522 CASE(_dreturn):
1523 {
1524 // Allow a safepoint before returning to frame manager.
1525 SAFEPOINT;
1526 goto handle_return;
1527 }
1528
1529 CASE(_return_register_finalizer): {
1530
1531 oop rcvr = LOCALS_OBJECT(0);
1532 VERIFY_OOP(rcvr);
1533 if (rcvr->klass()->klass_part()->has_finalizer()) {
1534 CALL_VM(InterpreterRuntime::register_finalizer(THREAD, rcvr), handle_exception);
1535 }
1536 goto handle_return;
1537 }
1538 CASE(_return): {
1539
1540 // Allow a safepoint before returning to frame manager.
1541 SAFEPOINT;
1542 goto handle_return;
1543 }
1544
1545 /* Array access byte-codes */
1546
1547 /* Every array access byte-code starts out like this */
1548 // arrayOopDesc* arrObj = (arrayOopDesc*)STACK_OBJECT(arrayOff);
1549 #define ARRAY_INTRO(arrayOff) \
1550 arrayOop arrObj = (arrayOop)STACK_OBJECT(arrayOff); \
1551 jint index = STACK_INT(arrayOff + 1); \
1552 char message[jintAsStringSize]; \
1553 CHECK_NULL(arrObj); \
1554 if ((uint32_t)index >= (uint32_t)arrObj->length()) { \
1555 sprintf(message, "%d", index); \
1556 VM_JAVA_ERROR(vmSymbols::java_lang_ArrayIndexOutOfBoundsException(), \
1557 message); \
1558 }
1559
1560 /* 32-bit loads. These handle conversion from < 32-bit types */
1561 #define ARRAY_LOADTO32(T, T2, format, stackRes, extra) \
1562 { \
1563 ARRAY_INTRO(-2); \
1564 extra; \
1565 SET_ ## stackRes(*(T2 *)(((address) arrObj->base(T)) + index * sizeof(T2)), \
1566 -2); \
1567 UPDATE_PC_AND_TOS_AND_CONTINUE(1, -1); \
1568 }
1569
1570 /* 64-bit loads */
1571 #define ARRAY_LOADTO64(T,T2, stackRes, extra) \
1572 { \
1573 ARRAY_INTRO(-2); \
1574 SET_ ## stackRes(*(T2 *)(((address) arrObj->base(T)) + index * sizeof(T2)), -1); \
1575 extra; \
1576 UPDATE_PC_AND_CONTINUE(1); \
1577 }
1578
1579 CASE(_iaload):
1580 ARRAY_LOADTO32(T_INT, jint, "%d", STACK_INT, 0);
1581 CASE(_faload):
1582 ARRAY_LOADTO32(T_FLOAT, jfloat, "%f", STACK_FLOAT, 0);
1583 CASE(_aaload):
1584 ARRAY_LOADTO32(T_OBJECT, oop, INTPTR_FORMAT, STACK_OBJECT, 0);
1585 CASE(_baload):
1586 ARRAY_LOADTO32(T_BYTE, jbyte, "%d", STACK_INT, 0);
1587 CASE(_caload):
1588 ARRAY_LOADTO32(T_CHAR, jchar, "%d", STACK_INT, 0);
1589 CASE(_saload):
1590 ARRAY_LOADTO32(T_SHORT, jshort, "%d", STACK_INT, 0);
1591 CASE(_laload):
1592 ARRAY_LOADTO64(T_LONG, jlong, STACK_LONG, 0);
1593 CASE(_daload):
1594 ARRAY_LOADTO64(T_DOUBLE, jdouble, STACK_DOUBLE, 0);
1595
1596 /* 32-bit stores. These handle conversion to < 32-bit types */
1597 #define ARRAY_STOREFROM32(T, T2, format, stackSrc, extra) \
1598 { \
1599 ARRAY_INTRO(-3); \
1600 extra; \
1601 *(T2 *)(((address) arrObj->base(T)) + index * sizeof(T2)) = stackSrc( -1); \
1602 UPDATE_PC_AND_TOS_AND_CONTINUE(1, -3); \
1603 }
1604
1605 /* 64-bit stores */
1606 #define ARRAY_STOREFROM64(T, T2, stackSrc, extra) \
1607 { \
1608 ARRAY_INTRO(-4); \
1609 extra; \
1610 *(T2 *)(((address) arrObj->base(T)) + index * sizeof(T2)) = stackSrc( -1); \
1611 UPDATE_PC_AND_TOS_AND_CONTINUE(1, -4); \
1612 }
1613
1614 CASE(_iastore):
1615 ARRAY_STOREFROM32(T_INT, jint, "%d", STACK_INT, 0);
1616 CASE(_fastore):
1617 ARRAY_STOREFROM32(T_FLOAT, jfloat, "%f", STACK_FLOAT, 0);
1618 /*
1619 * This one looks different because of the assignability check
1620 */
1621 CASE(_aastore): {
1622 oop rhsObject = STACK_OBJECT(-1);
1623 VERIFY_OOP(rhsObject);
1624 ARRAY_INTRO( -3);
1625 // arrObj, index are set
1626 if (rhsObject != NULL) {
1627 /* Check assignability of rhsObject into arrObj */
1628 klassOop rhsKlassOop = rhsObject->klass(); // EBX (subclass)
1629 assert(arrObj->klass()->klass()->klass_part()->oop_is_objArrayKlass(), "Ack not an objArrayKlass");
1630 klassOop elemKlassOop = ((objArrayKlass*) arrObj->klass()->klass_part())->element_klass(); // superklass EAX
1631 //
1632 // Check for compatibilty. This check must not GC!!
1633 // Seems way more expensive now that we must dispatch
1634 //
1635 if (rhsKlassOop != elemKlassOop && !rhsKlassOop->klass_part()->is_subtype_of(elemKlassOop)) { // ebx->is...
1636 VM_JAVA_ERROR(vmSymbols::java_lang_ArrayStoreException(), "");
1637 }
1638 }
1639 oop* elem_loc = (oop*)(((address) arrObj->base(T_OBJECT)) + index * sizeof(oop));
1640 // *(oop*)(((address) arrObj->base(T_OBJECT)) + index * sizeof(oop)) = rhsObject;
1641 *elem_loc = rhsObject;
1642 // Mark the card
1643 OrderAccess::release_store(&BYTE_MAP_BASE[(uintptr_t)elem_loc >> CardTableModRefBS::card_shift], 0);
1644 UPDATE_PC_AND_TOS_AND_CONTINUE(1, -3);
1645 }
1646 CASE(_bastore):
1647 ARRAY_STOREFROM32(T_BYTE, jbyte, "%d", STACK_INT, 0);
1648 CASE(_castore):
1649 ARRAY_STOREFROM32(T_CHAR, jchar, "%d", STACK_INT, 0);
1650 CASE(_sastore):
1651 ARRAY_STOREFROM32(T_SHORT, jshort, "%d", STACK_INT, 0);
1652 CASE(_lastore):
1653 ARRAY_STOREFROM64(T_LONG, jlong, STACK_LONG, 0);
1654 CASE(_dastore):
1655 ARRAY_STOREFROM64(T_DOUBLE, jdouble, STACK_DOUBLE, 0);
1656
1657 CASE(_arraylength):
1658 {
1659 arrayOop ary = (arrayOop) STACK_OBJECT(-1);
1660 CHECK_NULL(ary);
1661 SET_STACK_INT(ary->length(), -1);
1662 UPDATE_PC_AND_CONTINUE(1);
1663 }
1664
1665 /* monitorenter and monitorexit for locking/unlocking an object */
1666
1667 CASE(_monitorenter): {
1668 oop lockee = STACK_OBJECT(-1);
1669 // derefing's lockee ought to provoke implicit null check
1670 CHECK_NULL(lockee);
1671 // find a free monitor or one already allocated for this object
1672 // if we find a matching object then we need a new monitor
1673 // since this is recursive enter
1674 BasicObjectLock* limit = istate->monitor_base();
1675 BasicObjectLock* most_recent = (BasicObjectLock*) istate->stack_base();
1676 BasicObjectLock* entry = NULL;
1677 while (most_recent != limit ) {
1678 if (most_recent->obj() == NULL) entry = most_recent;
1679 else if (most_recent->obj() == lockee) break;
1680 most_recent++;
1681 }
1682 if (entry != NULL) {
1683 entry->set_obj(lockee);
1684 markOop displaced = lockee->mark()->set_unlocked();
1685 entry->lock()->set_displaced_header(displaced);
1686 if (Atomic::cmpxchg_ptr(entry, lockee->mark_addr(), displaced) != displaced) {
1687 // Is it simple recursive case?
1688 if (THREAD->is_lock_owned((address) displaced->clear_lock_bits())) {
1689 entry->lock()->set_displaced_header(NULL);
1690 } else {
1691 CALL_VM(InterpreterRuntime::monitorenter(THREAD, entry), handle_exception);
1692 }
1693 }
1694 UPDATE_PC_AND_TOS_AND_CONTINUE(1, -1);
1695 } else {
1696 istate->set_msg(more_monitors);
1697 UPDATE_PC_AND_RETURN(0); // Re-execute
1698 }
1699 }
1700
1701 CASE(_monitorexit): {
1702 oop lockee = STACK_OBJECT(-1);
1703 CHECK_NULL(lockee);
1704 // derefing's lockee ought to provoke implicit null check
1705 // find our monitor slot
1706 BasicObjectLock* limit = istate->monitor_base();
1707 BasicObjectLock* most_recent = (BasicObjectLock*) istate->stack_base();
1708 while (most_recent != limit ) {
1709 if ((most_recent)->obj() == lockee) {
1710 BasicLock* lock = most_recent->lock();
1711 markOop header = lock->displaced_header();
1712 most_recent->set_obj(NULL);
1713 // If it isn't recursive we either must swap old header or call the runtime
1714 if (header != NULL) {
1715 if (Atomic::cmpxchg_ptr(header, lockee->mark_addr(), lock) != lock) {
1716 // restore object for the slow case
1717 most_recent->set_obj(lockee);
1718 CALL_VM(InterpreterRuntime::monitorexit(THREAD, most_recent), handle_exception);
1719 }
1720 }
1721 UPDATE_PC_AND_TOS_AND_CONTINUE(1, -1);
1722 }
1723 most_recent++;
1724 }
1725 // Need to throw illegal monitor state exception
1726 CALL_VM(InterpreterRuntime::throw_illegal_monitor_state_exception(THREAD), handle_exception);
1727 ShouldNotReachHere();
1728 }
1729
1730 /* All of the non-quick opcodes. */
1731
1732 /* -Set clobbersCpIndex true if the quickened opcode clobbers the
1733 * constant pool index in the instruction.
1734 */
1735 CASE(_getfield):
1736 CASE(_getstatic):
1737 {
1738 u2 index;
1739 ConstantPoolCacheEntry* cache;
1740 index = Bytes::get_native_u2(pc+1);
1741
1742 // QQQ Need to make this as inlined as possible. Probably need to
1743 // split all the bytecode cases out so c++ compiler has a chance
1744 // for constant prop to fold everything possible away.
1745
1746 cache = cp->entry_at(index);
1747 if (!cache->is_resolved((Bytecodes::Code)opcode)) {
1748 CALL_VM(InterpreterRuntime::resolve_get_put(THREAD, (Bytecodes::Code)opcode),
1749 handle_exception);
1750 cache = cp->entry_at(index);
1751 }
1752
1753 #ifdef VM_JVMTI
1754 if (_jvmti_interp_events) {
1755 int *count_addr;
1756 oop obj;
1757 // Check to see if a field modification watch has been set
1758 // before we take the time to call into the VM.
1759 count_addr = (int *)JvmtiExport::get_field_access_count_addr();
1760 if ( *count_addr > 0 ) {
1761 if ((Bytecodes::Code)opcode == Bytecodes::_getstatic) {
1762 obj = (oop)NULL;
1763 } else {
1764 obj = (oop) STACK_OBJECT(-1);
1765 VERIFY_OOP(obj);
1766 }
1767 CALL_VM(InterpreterRuntime::post_field_access(THREAD,
1768 obj,
1769 cache),
1770 handle_exception);
1771 }
1772 }
1773 #endif /* VM_JVMTI */
1774
1775 oop obj;
1776 if ((Bytecodes::Code)opcode == Bytecodes::_getstatic) {
1777 obj = (oop) cache->f1();
1778 MORE_STACK(1); // Assume single slot push
1779 } else {
1780 obj = (oop) STACK_OBJECT(-1);
1781 CHECK_NULL(obj);
1782 }
1783
1784 //
1785 // Now store the result on the stack
1786 //
1787 TosState tos_type = cache->flag_state();
1788 int field_offset = cache->f2();
1789 if (cache->is_volatile()) {
1790 if (tos_type == atos) {
1791 VERIFY_OOP(obj->obj_field_acquire(field_offset));
1792 SET_STACK_OBJECT(obj->obj_field_acquire(field_offset), -1);
1793 } else if (tos_type == itos) {
1794 SET_STACK_INT(obj->int_field_acquire(field_offset), -1);
1795 } else if (tos_type == ltos) {
1796 SET_STACK_LONG(obj->long_field_acquire(field_offset), 0);
1797 MORE_STACK(1);
1798 } else if (tos_type == btos) {
1799 SET_STACK_INT(obj->byte_field_acquire(field_offset), -1);
1800 } else if (tos_type == ctos) {
1801 SET_STACK_INT(obj->char_field_acquire(field_offset), -1);
1802 } else if (tos_type == stos) {
1803 SET_STACK_INT(obj->short_field_acquire(field_offset), -1);
1804 } else if (tos_type == ftos) {
1805 SET_STACK_FLOAT(obj->float_field_acquire(field_offset), -1);
1806 } else {
1807 SET_STACK_DOUBLE(obj->double_field_acquire(field_offset), 0);
1808 MORE_STACK(1);
1809 }
1810 } else {
1811 if (tos_type == atos) {
1812 VERIFY_OOP(obj->obj_field(field_offset));
1813 SET_STACK_OBJECT(obj->obj_field(field_offset), -1);
1814 } else if (tos_type == itos) {
1815 SET_STACK_INT(obj->int_field(field_offset), -1);
1816 } else if (tos_type == ltos) {
1817 SET_STACK_LONG(obj->long_field(field_offset), 0);
1818 MORE_STACK(1);
1819 } else if (tos_type == btos) {
1820 SET_STACK_INT(obj->byte_field(field_offset), -1);
1821 } else if (tos_type == ctos) {
1822 SET_STACK_INT(obj->char_field(field_offset), -1);
1823 } else if (tos_type == stos) {
1824 SET_STACK_INT(obj->short_field(field_offset), -1);
1825 } else if (tos_type == ftos) {
1826 SET_STACK_FLOAT(obj->float_field(field_offset), -1);
1827 } else {
1828 SET_STACK_DOUBLE(obj->double_field(field_offset), 0);
1829 MORE_STACK(1);
1830 }
1831 }
1832
1833 UPDATE_PC_AND_CONTINUE(3);
1834 }
1835
1836 CASE(_putfield):
1837 CASE(_putstatic):
1838 {
1839 u2 index = Bytes::get_native_u2(pc+1);
1840 ConstantPoolCacheEntry* cache = cp->entry_at(index);
1841 if (!cache->is_resolved((Bytecodes::Code)opcode)) {
1842 CALL_VM(InterpreterRuntime::resolve_get_put(THREAD, (Bytecodes::Code)opcode),
1843 handle_exception);
1844 cache = cp->entry_at(index);
1845 }
1846
1847 #ifdef VM_JVMTI
1848 if (_jvmti_interp_events) {
1849 int *count_addr;
1850 oop obj;
1851 // Check to see if a field modification watch has been set
1852 // before we take the time to call into the VM.
1853 count_addr = (int *)JvmtiExport::get_field_modification_count_addr();
1854 if ( *count_addr > 0 ) {
1855 if ((Bytecodes::Code)opcode == Bytecodes::_putstatic) {
1856 obj = (oop)NULL;
1857 }
1858 else {
1859 if (cache->is_long() || cache->is_double()) {
1860 obj = (oop) STACK_OBJECT(-3);
1861 } else {
1862 obj = (oop) STACK_OBJECT(-2);
1863 }
1864 VERIFY_OOP(obj);
1865 }
1866
1867 CALL_VM(InterpreterRuntime::post_field_modification(THREAD,
1868 obj,
1869 cache,
1870 (jvalue *)STACK_SLOT(-1)),
1871 handle_exception);
1872 }
1873 }
1874 #endif /* VM_JVMTI */
1875
1876 // QQQ Need to make this as inlined as possible. Probably need to split all the bytecode cases
1877 // out so c++ compiler has a chance for constant prop to fold everything possible away.
1878
1879 oop obj;
1880 int count;
1881 TosState tos_type = cache->flag_state();
1882
1883 count = -1;
1884 if (tos_type == ltos || tos_type == dtos) {
1885 --count;
1886 }
1887 if ((Bytecodes::Code)opcode == Bytecodes::_putstatic) {
1888 obj = (oop) cache->f1();
1889 } else {
1890 --count;
1891 obj = (oop) STACK_OBJECT(count);
1892 CHECK_NULL(obj);
1893 }
1894
1895 //
1896 // Now store the result
1897 //
1898 int field_offset = cache->f2();
1899 if (cache->is_volatile()) {
1900 if (tos_type == itos) {
1901 obj->release_int_field_put(field_offset, STACK_INT(-1));
1902 } else if (tos_type == atos) {
1903 VERIFY_OOP(STACK_OBJECT(-1));
1904 obj->release_obj_field_put(field_offset, STACK_OBJECT(-1));
1905 OrderAccess::release_store(&BYTE_MAP_BASE[(uintptr_t)obj >> CardTableModRefBS::card_shift], 0);
1906 } else if (tos_type == btos) {
1907 obj->release_byte_field_put(field_offset, STACK_INT(-1));
1908 } else if (tos_type == ltos) {
1909 obj->release_long_field_put(field_offset, STACK_LONG(-1));
1910 } else if (tos_type == ctos) {
1911 obj->release_char_field_put(field_offset, STACK_INT(-1));
1912 } else if (tos_type == stos) {
1913 obj->release_short_field_put(field_offset, STACK_INT(-1));
1914 } else if (tos_type == ftos) {
1915 obj->release_float_field_put(field_offset, STACK_FLOAT(-1));
1916 } else {
1917 obj->release_double_field_put(field_offset, STACK_DOUBLE(-1));
1918 }
1919 OrderAccess::storeload();
1920 } else {
1921 if (tos_type == itos) {
1922 obj->int_field_put(field_offset, STACK_INT(-1));
1923 } else if (tos_type == atos) {
1924 VERIFY_OOP(STACK_OBJECT(-1));
1925 obj->obj_field_put(field_offset, STACK_OBJECT(-1));
1926 OrderAccess::release_store(&BYTE_MAP_BASE[(uintptr_t)obj >> CardTableModRefBS::card_shift], 0);
1927 } else if (tos_type == btos) {
1928 obj->byte_field_put(field_offset, STACK_INT(-1));
1929 } else if (tos_type == ltos) {
1930 obj->long_field_put(field_offset, STACK_LONG(-1));
1931 } else if (tos_type == ctos) {
1932 obj->char_field_put(field_offset, STACK_INT(-1));
1933 } else if (tos_type == stos) {
1934 obj->short_field_put(field_offset, STACK_INT(-1));
1935 } else if (tos_type == ftos) {
1936 obj->float_field_put(field_offset, STACK_FLOAT(-1));
1937 } else {
1938 obj->double_field_put(field_offset, STACK_DOUBLE(-1));
1939 }
1940 }
1941
1942 UPDATE_PC_AND_TOS_AND_CONTINUE(3, count);
1943 }
1944
1945 CASE(_new): {
1946 u2 index = Bytes::get_Java_u2(pc+1);
1947 constantPoolOop constants = istate->method()->constants();
1948 if (!constants->tag_at(index).is_unresolved_klass()) {
1949 // Make sure klass is initialized and doesn't have a finalizer
1950 oop entry = constants->slot_at(index).get_oop();
1951 assert(entry->is_klass(), "Should be resolved klass");
1952 klassOop k_entry = (klassOop) entry;
1953 assert(k_entry->klass_part()->oop_is_instance(), "Should be instanceKlass");
1954 instanceKlass* ik = (instanceKlass*) k_entry->klass_part();
1955 if ( ik->is_initialized() && ik->can_be_fastpath_allocated() ) {
1956 size_t obj_size = ik->size_helper();
1957 oop result = NULL;
1958 // If the TLAB isn't pre-zeroed then we'll have to do it
1959 bool need_zero = !ZeroTLAB;
1960 if (UseTLAB) {
1961 result = (oop) THREAD->tlab().allocate(obj_size);
1962 }
1963 if (result == NULL) {
1964 need_zero = true;
1965 // Try allocate in shared eden
1966 retry:
1967 HeapWord* compare_to = *Universe::heap()->top_addr();
1968 HeapWord* new_top = compare_to + obj_size;
1969 if (new_top <= *Universe::heap()->end_addr()) {
1970 if (Atomic::cmpxchg_ptr(new_top, Universe::heap()->top_addr(), compare_to) != compare_to) {
1971 goto retry;
1972 }
1973 result = (oop) compare_to;
1974 }
1975 }
1976 if (result != NULL) {
1977 // Initialize object (if nonzero size and need) and then the header
1978 if (need_zero ) {
1979 HeapWord* to_zero = (HeapWord*) result + sizeof(oopDesc) / oopSize;
1980 obj_size -= sizeof(oopDesc) / oopSize;
1981 if (obj_size > 0 ) {
1982 memset(to_zero, 0, obj_size * HeapWordSize);
1983 }
1984 }
1985 if (UseBiasedLocking) {
1986 result->set_mark(ik->prototype_header());
1987 } else {
1988 result->set_mark(markOopDesc::prototype());
1989 }
1990 result->set_klass_gap(0);
1991 result->set_klass(k_entry);
1992 SET_STACK_OBJECT(result, 0);
1993 UPDATE_PC_AND_TOS_AND_CONTINUE(3, 1);
1994 }
1995 }
1996 }
1997 // Slow case allocation
1998 CALL_VM(InterpreterRuntime::_new(THREAD, METHOD->constants(), index),
1999 handle_exception);
2000 SET_STACK_OBJECT(THREAD->vm_result(), 0);
2001 THREAD->set_vm_result(NULL);
2002 UPDATE_PC_AND_TOS_AND_CONTINUE(3, 1);
2003 }
2004 CASE(_anewarray): {
2005 u2 index = Bytes::get_Java_u2(pc+1);
2006 jint size = STACK_INT(-1);
2007 CALL_VM(InterpreterRuntime::anewarray(THREAD, METHOD->constants(), index, size),
2008 handle_exception);
2009 SET_STACK_OBJECT(THREAD->vm_result(), -1);
2010 THREAD->set_vm_result(NULL);
2011 UPDATE_PC_AND_CONTINUE(3);
2012 }
2013 CASE(_multianewarray): {
2014 jint dims = *(pc+3);
2015 jint size = STACK_INT(-1);
2016 // stack grows down, dimensions are up!
2017 jint *dimarray =
2018 (jint*)&topOfStack[dims * Interpreter::stackElementWords+
2019 Interpreter::stackElementWords-1];
2020 //adjust pointer to start of stack element
2021 CALL_VM(InterpreterRuntime::multianewarray(THREAD, dimarray),
2022 handle_exception);
2023 SET_STACK_OBJECT(THREAD->vm_result(), -dims);
2024 THREAD->set_vm_result(NULL);
2025 UPDATE_PC_AND_TOS_AND_CONTINUE(4, -(dims-1));
2026 }
2027 CASE(_checkcast):
2028 if (STACK_OBJECT(-1) != NULL) {
2029 VERIFY_OOP(STACK_OBJECT(-1));
2030 u2 index = Bytes::get_Java_u2(pc+1);
2031 if (ProfileInterpreter) {
2032 // needs Profile_checkcast QQQ
2033 ShouldNotReachHere();
2034 }
2035 // Constant pool may have actual klass or unresolved klass. If it is
2036 // unresolved we must resolve it
2037 if (METHOD->constants()->tag_at(index).is_unresolved_klass()) {
2038 CALL_VM(InterpreterRuntime::quicken_io_cc(THREAD), handle_exception);
2039 }
2040 klassOop klassOf = (klassOop) METHOD->constants()->slot_at(index).get_oop();
2041 klassOop objKlassOop = STACK_OBJECT(-1)->klass(); //ebx
2042 //
2043 // Check for compatibilty. This check must not GC!!
2044 // Seems way more expensive now that we must dispatch
2045 //
2046 if (objKlassOop != klassOf &&
2047 !objKlassOop->klass_part()->is_subtype_of(klassOf)) {
2048 ResourceMark rm(THREAD);
2049 const char* objName = Klass::cast(objKlassOop)->external_name();
2050 const char* klassName = Klass::cast(klassOf)->external_name();
2051 char* message = SharedRuntime::generate_class_cast_message(
2052 objName, klassName);
2053 VM_JAVA_ERROR(vmSymbols::java_lang_ClassCastException(), message);
2054 }
2055 } else {
2056 if (UncommonNullCast) {
2057 // istate->method()->set_null_cast_seen();
2058 // [RGV] Not sure what to do here!
2059
2060 }
2061 }
2062 UPDATE_PC_AND_CONTINUE(3);
2063
2064 CASE(_instanceof):
2065 if (STACK_OBJECT(-1) == NULL) {
2066 SET_STACK_INT(0, -1);
2067 } else {
2068 VERIFY_OOP(STACK_OBJECT(-1));
2069 u2 index = Bytes::get_Java_u2(pc+1);
2070 // Constant pool may have actual klass or unresolved klass. If it is
2071 // unresolved we must resolve it
2072 if (METHOD->constants()->tag_at(index).is_unresolved_klass()) {
2073 CALL_VM(InterpreterRuntime::quicken_io_cc(THREAD), handle_exception);
2074 }
2075 klassOop klassOf = (klassOop) METHOD->constants()->slot_at(index).get_oop();
2076 klassOop objKlassOop = STACK_OBJECT(-1)->klass();
2077 //
2078 // Check for compatibilty. This check must not GC!!
2079 // Seems way more expensive now that we must dispatch
2080 //
2081 if ( objKlassOop == klassOf || objKlassOop->klass_part()->is_subtype_of(klassOf)) {
2082 SET_STACK_INT(1, -1);
2083 } else {
2084 SET_STACK_INT(0, -1);
2085 }
2086 }
2087 UPDATE_PC_AND_CONTINUE(3);
2088
2089 CASE(_ldc_w):
2090 CASE(_ldc):
2091 {
2092 u2 index;
2093 bool wide = false;
2094 int incr = 2; // frequent case
2095 if (opcode == Bytecodes::_ldc) {
2096 index = pc[1];
2097 } else {
2098 index = Bytes::get_Java_u2(pc+1);
2099 incr = 3;
2100 wide = true;
2101 }
2102
2103 constantPoolOop constants = METHOD->constants();
2104 switch (constants->tag_at(index).value()) {
2105 case JVM_CONSTANT_Integer:
2106 SET_STACK_INT(constants->int_at(index), 0);
2107 break;
2108
2109 case JVM_CONSTANT_Float:
2110 SET_STACK_FLOAT(constants->float_at(index), 0);
2111 break;
2112
2113 case JVM_CONSTANT_String:
2114 VERIFY_OOP(constants->resolved_string_at(index));
2115 SET_STACK_OBJECT(constants->resolved_string_at(index), 0);
2116 break;
2117
2118 case JVM_CONSTANT_Class:
2119 VERIFY_OOP(constants->resolved_klass_at(index)->java_mirror());
2120 SET_STACK_OBJECT(constants->resolved_klass_at(index)->java_mirror(), 0);
2121 break;
2122
2123 case JVM_CONSTANT_UnresolvedString:
2124 case JVM_CONSTANT_UnresolvedClass:
2125 case JVM_CONSTANT_UnresolvedClassInError:
2126 CALL_VM(InterpreterRuntime::ldc(THREAD, wide), handle_exception);
2127 SET_STACK_OBJECT(THREAD->vm_result(), 0);
2128 THREAD->set_vm_result(NULL);
2129 break;
2130
2131 default: ShouldNotReachHere();
2132 }
2133 UPDATE_PC_AND_TOS_AND_CONTINUE(incr, 1);
2134 }
2135
2136 CASE(_ldc2_w):
2137 {
2138 u2 index = Bytes::get_Java_u2(pc+1);
2139
2140 constantPoolOop constants = METHOD->constants();
2141 switch (constants->tag_at(index).value()) {
2142
2143 case JVM_CONSTANT_Long:
2144 SET_STACK_LONG(constants->long_at(index), 1);
2145 break;
2146
2147 case JVM_CONSTANT_Double:
2148 SET_STACK_DOUBLE(constants->double_at(index), 1);
2149 break;
2150 default: ShouldNotReachHere();
2151 }
2152 UPDATE_PC_AND_TOS_AND_CONTINUE(3, 2);
2153 }
2154
2155 CASE(_fast_aldc_w):
2156 CASE(_fast_aldc): {
2157 if (!EnableInvokeDynamic) {
2158 // We should not encounter this bytecode if !EnableInvokeDynamic.
2159 // The verifier will stop it. However, if we get past the verifier,
2160 // this will stop the thread in a reasonable way, without crashing the JVM.
2161 CALL_VM(InterpreterRuntime::throw_IncompatibleClassChangeError(THREAD),
2162 handle_exception);
2163 ShouldNotReachHere();
2164 }
2165
2166 u2 index;
2167 int incr;
2168 if (opcode == Bytecodes::_fast_aldc) {
2169 index = pc[1];
2170 incr = 2;
2171 } else {
2172 index = Bytes::get_native_u2(pc+1);
2173 incr = 3;
2174 }
2175
2176 // We are resolved if the f1 field contains a non-null object (CallSite, etc.)
2177 // This kind of CP cache entry does not need to match the flags byte, because
2178 // there is a 1-1 relation between bytecode type and CP entry type.
2179 ConstantPoolCacheEntry* cache = cp->entry_at(index);
2180 if (cache->is_f1_null()) {
2181 CALL_VM(InterpreterRuntime::resolve_ldc(THREAD, (Bytecodes::Code) opcode),
2182 handle_exception);
2183 }
2184
2185 VERIFY_OOP(cache->f1());
2186 SET_STACK_OBJECT(cache->f1(), 0);
2187 UPDATE_PC_AND_TOS_AND_CONTINUE(incr, 1);
2188 }
2189
2190 CASE(_invokedynamic): {
2191 if (!EnableInvokeDynamic) {
2192 // We should not encounter this bytecode if !EnableInvokeDynamic.
2193 // The verifier will stop it. However, if we get past the verifier,
2194 // this will stop the thread in a reasonable way, without crashing the JVM.
2195 CALL_VM(InterpreterRuntime::throw_IncompatibleClassChangeError(THREAD),
2196 handle_exception);
2197 ShouldNotReachHere();
2198 }
2199
2200 int index = Bytes::get_native_u4(pc+1);
2201
2202 // We are resolved if the f1 field contains a non-null object (CallSite, etc.)
2203 // This kind of CP cache entry does not need to match the flags byte, because
2204 // there is a 1-1 relation between bytecode type and CP entry type.
2205 assert(constantPoolCacheOopDesc::is_secondary_index(index), "incorrect format");
2206 ConstantPoolCacheEntry* cache = cp->secondary_entry_at(index);
2207 if (cache->is_f1_null()) {
2208 CALL_VM(InterpreterRuntime::resolve_invokedynamic(THREAD),
2209 handle_exception);
2210 }
2211
2212 VERIFY_OOP(cache->f1());
2213 oop method_handle = java_lang_invoke_CallSite::target(cache->f1());
2214 CHECK_NULL(method_handle);
2215
2216 istate->set_msg(call_method_handle);
2217 istate->set_callee((methodOop) method_handle);
2218 istate->set_bcp_advance(5);
2219
2220 UPDATE_PC_AND_RETURN(0); // I'll be back...
2221 }
2222
2223 CASE(_invokeinterface): {
2224 u2 index = Bytes::get_native_u2(pc+1);
2225
2226 // QQQ Need to make this as inlined as possible. Probably need to split all the bytecode cases
2227 // out so c++ compiler has a chance for constant prop to fold everything possible away.
2228
2229 ConstantPoolCacheEntry* cache = cp->entry_at(index);
2230 if (!cache->is_resolved((Bytecodes::Code)opcode)) {
2231 CALL_VM(InterpreterRuntime::resolve_invoke(THREAD, (Bytecodes::Code)opcode),
2232 handle_exception);
2233 cache = cp->entry_at(index);
2234 }
2235
2236 istate->set_msg(call_method);
2237
2238 // Special case of invokeinterface called for virtual method of
2239 // java.lang.Object. See cpCacheOop.cpp for details.
2240 // This code isn't produced by javac, but could be produced by
2241 // another compliant java compiler.
2242 if (cache->is_methodInterface()) {
2243 methodOop callee;
2244 CHECK_NULL(STACK_OBJECT(-(cache->parameter_size())));
2245 if (cache->is_vfinal()) {
2246 callee = (methodOop) cache->f2();
2247 } else {
2248 // get receiver
2249 int parms = cache->parameter_size();
2250 // Same comments as invokevirtual apply here
2251 VERIFY_OOP(STACK_OBJECT(-parms));
2252 instanceKlass* rcvrKlass = (instanceKlass*)
2253 STACK_OBJECT(-parms)->klass()->klass_part();
2254 callee = (methodOop) rcvrKlass->start_of_vtable()[ cache->f2()];
2255 }
2256 istate->set_callee(callee);
2257 istate->set_callee_entry_point(callee->from_interpreted_entry());
2258 #ifdef VM_JVMTI
2259 if (JvmtiExport::can_post_interpreter_events() && THREAD->is_interp_only_mode()) {
2260 istate->set_callee_entry_point(callee->interpreter_entry());
2261 }
2262 #endif /* VM_JVMTI */
2263 istate->set_bcp_advance(5);
2264 UPDATE_PC_AND_RETURN(0); // I'll be back...
2265 }
2266
2267 // this could definitely be cleaned up QQQ
2268 methodOop callee;
2269 klassOop iclass = (klassOop)cache->f1();
2270 // instanceKlass* interface = (instanceKlass*) iclass->klass_part();
2271 // get receiver
2272 int parms = cache->parameter_size();
2273 oop rcvr = STACK_OBJECT(-parms);
2274 CHECK_NULL(rcvr);
2275 instanceKlass* int2 = (instanceKlass*) rcvr->klass()->klass_part();
2276 itableOffsetEntry* ki = (itableOffsetEntry*) int2->start_of_itable();
2277 int i;
2278 for ( i = 0 ; i < int2->itable_length() ; i++, ki++ ) {
2279 if (ki->interface_klass() == iclass) break;
2280 }
2281 // If the interface isn't found, this class doesn't implement this
2282 // interface. The link resolver checks this but only for the first
2283 // time this interface is called.
2284 if (i == int2->itable_length()) {
2285 VM_JAVA_ERROR(vmSymbols::java_lang_IncompatibleClassChangeError(), "");
2286 }
2287 int mindex = cache->f2();
2288 itableMethodEntry* im = ki->first_method_entry(rcvr->klass());
2289 callee = im[mindex].method();
2290 if (callee == NULL) {
2291 VM_JAVA_ERROR(vmSymbols::java_lang_AbstractMethodError(), "");
2292 }
2293
2294 istate->set_callee(callee);
2295 istate->set_callee_entry_point(callee->from_interpreted_entry());
2296 #ifdef VM_JVMTI
2297 if (JvmtiExport::can_post_interpreter_events() && THREAD->is_interp_only_mode()) {
2298 istate->set_callee_entry_point(callee->interpreter_entry());
2299 }
2300 #endif /* VM_JVMTI */
2301 istate->set_bcp_advance(5);
2302 UPDATE_PC_AND_RETURN(0); // I'll be back...
2303 }
2304
2305 CASE(_invokevirtual):
2306 CASE(_invokespecial):
2307 CASE(_invokestatic): {
2308 u2 index = Bytes::get_native_u2(pc+1);
2309
2310 ConstantPoolCacheEntry* cache = cp->entry_at(index);
2311 // QQQ Need to make this as inlined as possible. Probably need to split all the bytecode cases
2312 // out so c++ compiler has a chance for constant prop to fold everything possible away.
2313
2314 if (!cache->is_resolved((Bytecodes::Code)opcode)) {
2315 CALL_VM(InterpreterRuntime::resolve_invoke(THREAD, (Bytecodes::Code)opcode),
2316 handle_exception);
2317 cache = cp->entry_at(index);
2318 }
2319
2320 istate->set_msg(call_method);
2321 {
2322 methodOop callee;
2323 if ((Bytecodes::Code)opcode == Bytecodes::_invokevirtual) {
2324 CHECK_NULL(STACK_OBJECT(-(cache->parameter_size())));
2325 if (cache->is_vfinal()) callee = (methodOop) cache->f2();
2326 else {
2327 // get receiver
2328 int parms = cache->parameter_size();
2329 // this works but needs a resourcemark and seems to create a vtable on every call:
2330 // methodOop callee = rcvr->klass()->klass_part()->vtable()->method_at(cache->f2());
2331 //
2332 // this fails with an assert
2333 // instanceKlass* rcvrKlass = instanceKlass::cast(STACK_OBJECT(-parms)->klass());
2334 // but this works
2335 VERIFY_OOP(STACK_OBJECT(-parms));
2336 instanceKlass* rcvrKlass = (instanceKlass*) STACK_OBJECT(-parms)->klass()->klass_part();
2337 /*
2338 Executing this code in java.lang.String:
2339 public String(char value[]) {
2340 this.count = value.length;
2341 this.value = (char[])value.clone();
2342 }
2343
2344 a find on rcvr->klass()->klass_part() reports:
2345 {type array char}{type array class}
2346 - klass: {other class}
2347
2348 but using instanceKlass::cast(STACK_OBJECT(-parms)->klass()) causes in assertion failure
2349 because rcvr->klass()->klass_part()->oop_is_instance() == 0
2350 However it seems to have a vtable in the right location. Huh?
2351
2352 */
2353 callee = (methodOop) rcvrKlass->start_of_vtable()[ cache->f2()];
2354 }
2355 } else {
2356 if ((Bytecodes::Code)opcode == Bytecodes::_invokespecial) {
2357 CHECK_NULL(STACK_OBJECT(-(cache->parameter_size())));
2358 }
2359 callee = (methodOop) cache->f1();
2360 }
2361
2362 istate->set_callee(callee);
2363 istate->set_callee_entry_point(callee->from_interpreted_entry());
2364 #ifdef VM_JVMTI
2365 if (JvmtiExport::can_post_interpreter_events() && THREAD->is_interp_only_mode()) {
2366 istate->set_callee_entry_point(callee->interpreter_entry());
2367 }
2368 #endif /* VM_JVMTI */
2369 istate->set_bcp_advance(3);
2370 UPDATE_PC_AND_RETURN(0); // I'll be back...
2371 }
2372 }
2373
2374 /* Allocate memory for a new java object. */
2375
2376 CASE(_newarray): {
2377 BasicType atype = (BasicType) *(pc+1);
2378 jint size = STACK_INT(-1);
2379 CALL_VM(InterpreterRuntime::newarray(THREAD, atype, size),
2380 handle_exception);
2381 SET_STACK_OBJECT(THREAD->vm_result(), -1);
2382 THREAD->set_vm_result(NULL);
2383
2384 UPDATE_PC_AND_CONTINUE(2);
2385 }
2386
2387 /* Throw an exception. */
2388
2389 CASE(_athrow): {
2390 oop except_oop = STACK_OBJECT(-1);
2391 CHECK_NULL(except_oop);
2392 // set pending_exception so we use common code
2393 THREAD->set_pending_exception(except_oop, NULL, 0);
2394 goto handle_exception;
2395 }
2396
2397 /* goto and jsr. They are exactly the same except jsr pushes
2398 * the address of the next instruction first.
2399 */
2400
2401 CASE(_jsr): {
2402 /* push bytecode index on stack */
2403 SET_STACK_ADDR(((address)pc - (intptr_t)(istate->method()->code_base()) + 3), 0);
2404 MORE_STACK(1);
2405 /* FALL THROUGH */
2406 }
2407
2408 CASE(_goto):
2409 {
2410 int16_t offset = (int16_t)Bytes::get_Java_u2(pc + 1);
2411 address branch_pc = pc;
2412 UPDATE_PC(offset);
2413 DO_BACKEDGE_CHECKS(offset, branch_pc);
2414 CONTINUE;
2415 }
2416
2417 CASE(_jsr_w): {
2418 /* push return address on the stack */
2419 SET_STACK_ADDR(((address)pc - (intptr_t)(istate->method()->code_base()) + 5), 0);
2420 MORE_STACK(1);
2421 /* FALL THROUGH */
2422 }
2423
2424 CASE(_goto_w):
2425 {
2426 int32_t offset = Bytes::get_Java_u4(pc + 1);
2427 address branch_pc = pc;
2428 UPDATE_PC(offset);
2429 DO_BACKEDGE_CHECKS(offset, branch_pc);
2430 CONTINUE;
2431 }
2432
2433 /* return from a jsr or jsr_w */
2434
2435 CASE(_ret): {
2436 pc = istate->method()->code_base() + (intptr_t)(LOCALS_ADDR(pc[1]));
2437 UPDATE_PC_AND_CONTINUE(0);
2438 }
2439
2440 /* debugger breakpoint */
2441
2442 CASE(_breakpoint): {
2443 Bytecodes::Code original_bytecode;
2444 DECACHE_STATE();
2445 SET_LAST_JAVA_FRAME();
2446 original_bytecode = InterpreterRuntime::get_original_bytecode_at(THREAD,
2447 METHOD, pc);
2448 RESET_LAST_JAVA_FRAME();
2449 CACHE_STATE();
2450 if (THREAD->has_pending_exception()) goto handle_exception;
2451 CALL_VM(InterpreterRuntime::_breakpoint(THREAD, METHOD, pc),
2452 handle_exception);
2453
2454 opcode = (jubyte)original_bytecode;
2455 goto opcode_switch;
2456 }
2457
2458 DEFAULT:
2459 fatal(err_msg("Unimplemented opcode %d = %s", opcode,
2460 Bytecodes::name((Bytecodes::Code)opcode)));
2461 goto finish;
2462
2463 } /* switch(opc) */
2464
2465
2466 #ifdef USELABELS
2467 check_for_exception:
2468 #endif
2469 {
2470 if (!THREAD->has_pending_exception()) {
2471 CONTINUE;
2472 }
2473 /* We will be gcsafe soon, so flush our state. */
2474 DECACHE_PC();
2475 goto handle_exception;
2476 }
2477 do_continue: ;
2478
2479 } /* while (1) interpreter loop */
2480
2481
2482 // An exception exists in the thread state see whether this activation can handle it
2483 handle_exception: {
2484
2485 HandleMarkCleaner __hmc(THREAD);
2486 Handle except_oop(THREAD, THREAD->pending_exception());
2487 // Prevent any subsequent HandleMarkCleaner in the VM
2488 // from freeing the except_oop handle.
2489 HandleMark __hm(THREAD);
2490
2491 THREAD->clear_pending_exception();
2492 assert(except_oop(), "No exception to process");
2493 intptr_t continuation_bci;
2494 // expression stack is emptied
2495 topOfStack = istate->stack_base() - Interpreter::stackElementWords;
2496 CALL_VM(continuation_bci = (intptr_t)InterpreterRuntime::exception_handler_for_exception(THREAD, except_oop()),
2497 handle_exception);
2498
2499 except_oop = (oop) THREAD->vm_result();
2500 THREAD->set_vm_result(NULL);
2501 if (continuation_bci >= 0) {
2502 // Place exception on top of stack
2503 SET_STACK_OBJECT(except_oop(), 0);
2504 MORE_STACK(1);
2505 pc = METHOD->code_base() + continuation_bci;
2506 if (TraceExceptions) {
2507 ttyLocker ttyl;
2508 ResourceMark rm;
2509 tty->print_cr("Exception <%s> (" INTPTR_FORMAT ")", except_oop->print_value_string(), except_oop());
2510 tty->print_cr(" thrown in interpreter method <%s>", METHOD->print_value_string());
2511 tty->print_cr(" at bci %d, continuing at %d for thread " INTPTR_FORMAT,
2512 pc - (intptr_t)METHOD->code_base(),
2513 continuation_bci, THREAD);
2514 }
2515 // for AbortVMOnException flag
2516 NOT_PRODUCT(Exceptions::debug_check_abort(except_oop));
2517 goto run;
2518 }
2519 if (TraceExceptions) {
2520 ttyLocker ttyl;
2521 ResourceMark rm;
2522 tty->print_cr("Exception <%s> (" INTPTR_FORMAT ")", except_oop->print_value_string(), except_oop());
2523 tty->print_cr(" thrown in interpreter method <%s>", METHOD->print_value_string());
2524 tty->print_cr(" at bci %d, unwinding for thread " INTPTR_FORMAT,
2525 pc - (intptr_t) METHOD->code_base(),
2526 THREAD);
2527 }
2528 // for AbortVMOnException flag
2529 NOT_PRODUCT(Exceptions::debug_check_abort(except_oop));
2530 // No handler in this activation, unwind and try again
2531 THREAD->set_pending_exception(except_oop(), NULL, 0);
2532 goto handle_return;
2533 } /* handle_exception: */
2534
2535
2536
2537 // Return from an interpreter invocation with the result of the interpretation
2538 // on the top of the Java Stack (or a pending exception)
2539
2540 handle_Pop_Frame:
2541
2542 // We don't really do anything special here except we must be aware
2543 // that we can get here without ever locking the method (if sync).
2544 // Also we skip the notification of the exit.
2545
2546 istate->set_msg(popping_frame);
2547 // Clear pending so while the pop is in process
2548 // we don't start another one if a call_vm is done.
2549 THREAD->clr_pop_frame_pending();
2550 // Let interpreter (only) see the we're in the process of popping a frame
2551 THREAD->set_pop_frame_in_process();
2552
2553 handle_return:
2554 {
2555 DECACHE_STATE();
2556
2557 bool suppress_error = istate->msg() == popping_frame;
2558 bool suppress_exit_event = THREAD->has_pending_exception() || suppress_error;
2559 Handle original_exception(THREAD, THREAD->pending_exception());
2560 Handle illegal_state_oop(THREAD, NULL);
2561
2562 // We'd like a HandleMark here to prevent any subsequent HandleMarkCleaner
2563 // in any following VM entries from freeing our live handles, but illegal_state_oop
2564 // isn't really allocated yet and so doesn't become live until later and
2565 // in unpredicatable places. Instead we must protect the places where we enter the
2566 // VM. It would be much simpler (and safer) if we could allocate a real handle with
2567 // a NULL oop in it and then overwrite the oop later as needed. This isn't
2568 // unfortunately isn't possible.
2569
2570 THREAD->clear_pending_exception();
2571
2572 //
2573 // As far as we are concerned we have returned. If we have a pending exception
2574 // that will be returned as this invocation's result. However if we get any
2575 // exception(s) while checking monitor state one of those IllegalMonitorStateExceptions
2576 // will be our final result (i.e. monitor exception trumps a pending exception).
2577 //
2578
2579 // If we never locked the method (or really passed the point where we would have),
2580 // there is no need to unlock it (or look for other monitors), since that
2581 // could not have happened.
2582
2583 if (THREAD->do_not_unlock()) {
2584
2585 // Never locked, reset the flag now because obviously any caller must
2586 // have passed their point of locking for us to have gotten here.
2587
2588 THREAD->clr_do_not_unlock();
2589 } else {
2590 // At this point we consider that we have returned. We now check that the
2591 // locks were properly block structured. If we find that they were not
2592 // used properly we will return with an illegal monitor exception.
2593 // The exception is checked by the caller not the callee since this
2594 // checking is considered to be part of the invocation and therefore
2595 // in the callers scope (JVM spec 8.13).
2596 //
2597 // Another weird thing to watch for is if the method was locked
2598 // recursively and then not exited properly. This means we must
2599 // examine all the entries in reverse time(and stack) order and
2600 // unlock as we find them. If we find the method monitor before
2601 // we are at the initial entry then we should throw an exception.
2602 // It is not clear the template based interpreter does this
2603 // correctly
2604
2605 BasicObjectLock* base = istate->monitor_base();
2606 BasicObjectLock* end = (BasicObjectLock*) istate->stack_base();
2607 bool method_unlock_needed = METHOD->is_synchronized();
2608 // We know the initial monitor was used for the method don't check that
2609 // slot in the loop
2610 if (method_unlock_needed) base--;
2611
2612 // Check all the monitors to see they are unlocked. Install exception if found to be locked.
2613 while (end < base) {
2614 oop lockee = end->obj();
2615 if (lockee != NULL) {
2616 BasicLock* lock = end->lock();
2617 markOop header = lock->displaced_header();
2618 end->set_obj(NULL);
2619 // If it isn't recursive we either must swap old header or call the runtime
2620 if (header != NULL) {
2621 if (Atomic::cmpxchg_ptr(header, lockee->mark_addr(), lock) != lock) {
2622 // restore object for the slow case
2623 end->set_obj(lockee);
2624 {
2625 // Prevent any HandleMarkCleaner from freeing our live handles
2626 HandleMark __hm(THREAD);
2627 CALL_VM_NOCHECK(InterpreterRuntime::monitorexit(THREAD, end));
2628 }
2629 }
2630 }
2631 // One error is plenty
2632 if (illegal_state_oop() == NULL && !suppress_error) {
2633 {
2634 // Prevent any HandleMarkCleaner from freeing our live handles
2635 HandleMark __hm(THREAD);
2636 CALL_VM_NOCHECK(InterpreterRuntime::throw_illegal_monitor_state_exception(THREAD));
2637 }
2638 assert(THREAD->has_pending_exception(), "Lost our exception!");
2639 illegal_state_oop = THREAD->pending_exception();
2640 THREAD->clear_pending_exception();
2641 }
2642 }
2643 end++;
2644 }
2645 // Unlock the method if needed
2646 if (method_unlock_needed) {
2647 if (base->obj() == NULL) {
2648 // The method is already unlocked this is not good.
2649 if (illegal_state_oop() == NULL && !suppress_error) {
2650 {
2651 // Prevent any HandleMarkCleaner from freeing our live handles
2652 HandleMark __hm(THREAD);
2653 CALL_VM_NOCHECK(InterpreterRuntime::throw_illegal_monitor_state_exception(THREAD));
2654 }
2655 assert(THREAD->has_pending_exception(), "Lost our exception!");
2656 illegal_state_oop = THREAD->pending_exception();
2657 THREAD->clear_pending_exception();
2658 }
2659 } else {
2660 //
2661 // The initial monitor is always used for the method
2662 // However if that slot is no longer the oop for the method it was unlocked
2663 // and reused by something that wasn't unlocked!
2664 //
2665 // deopt can come in with rcvr dead because c2 knows
2666 // its value is preserved in the monitor. So we can't use locals[0] at all
2667 // and must use first monitor slot.
2668 //
2669 oop rcvr = base->obj();
2670 if (rcvr == NULL) {
2671 if (!suppress_error) {
2672 VM_JAVA_ERROR_NO_JUMP(vmSymbols::java_lang_NullPointerException(), "");
2673 illegal_state_oop = THREAD->pending_exception();
2674 THREAD->clear_pending_exception();
2675 }
2676 } else {
2677 BasicLock* lock = base->lock();
2678 markOop header = lock->displaced_header();
2679 base->set_obj(NULL);
2680 // If it isn't recursive we either must swap old header or call the runtime
2681 if (header != NULL) {
2682 if (Atomic::cmpxchg_ptr(header, rcvr->mark_addr(), lock) != lock) {
2683 // restore object for the slow case
2684 base->set_obj(rcvr);
2685 {
2686 // Prevent any HandleMarkCleaner from freeing our live handles
2687 HandleMark __hm(THREAD);
2688 CALL_VM_NOCHECK(InterpreterRuntime::monitorexit(THREAD, base));
2689 }
2690 if (THREAD->has_pending_exception()) {
2691 if (!suppress_error) illegal_state_oop = THREAD->pending_exception();
2692 THREAD->clear_pending_exception();
2693 }
2694 }
2695 }
2696 }
2697 }
2698 }
2699 }
2700
2701 //
2702 // Notify jvmti/jvmdi
2703 //
2704 // NOTE: we do not notify a method_exit if we have a pending exception,
2705 // including an exception we generate for unlocking checks. In the former
2706 // case, JVMDI has already been notified by our call for the exception handler
2707 // and in both cases as far as JVMDI is concerned we have already returned.
2708 // If we notify it again JVMDI will be all confused about how many frames
2709 // are still on the stack (4340444).
2710 //
2711 // NOTE Further! It turns out the the JVMTI spec in fact expects to see
2712 // method_exit events whenever we leave an activation unless it was done
2713 // for popframe. This is nothing like jvmdi. However we are passing the
2714 // tests at the moment (apparently because they are jvmdi based) so rather
2715 // than change this code and possibly fail tests we will leave it alone
2716 // (with this note) in anticipation of changing the vm and the tests
2717 // simultaneously.
2718
2719
2720 //
2721 suppress_exit_event = suppress_exit_event || illegal_state_oop() != NULL;
2722
2723
2724
2725 #ifdef VM_JVMTI
2726 if (_jvmti_interp_events) {
2727 // Whenever JVMTI puts a thread in interp_only_mode, method
2728 // entry/exit events are sent for that thread to track stack depth.
2729 if ( !suppress_exit_event && THREAD->is_interp_only_mode() ) {
2730 {
2731 // Prevent any HandleMarkCleaner from freeing our live handles
2732 HandleMark __hm(THREAD);
2733 CALL_VM_NOCHECK(InterpreterRuntime::post_method_exit(THREAD));
2734 }
2735 }
2736 }
2737 #endif /* VM_JVMTI */
2738
2739 //
2740 // See if we are returning any exception
2741 // A pending exception that was pending prior to a possible popping frame
2742 // overrides the popping frame.
2743 //
2744 assert(!suppress_error || suppress_error && illegal_state_oop() == NULL, "Error was not suppressed");
2745 if (illegal_state_oop() != NULL || original_exception() != NULL) {
2746 // inform the frame manager we have no result
2747 istate->set_msg(throwing_exception);
2748 if (illegal_state_oop() != NULL)
2749 THREAD->set_pending_exception(illegal_state_oop(), NULL, 0);
2750 else
2751 THREAD->set_pending_exception(original_exception(), NULL, 0);
2752 istate->set_return_kind((Bytecodes::Code)opcode);
2753 UPDATE_PC_AND_RETURN(0);
2754 }
2755
2756 if (istate->msg() == popping_frame) {
2757 // Make it simpler on the assembly code and set the message for the frame pop.
2758 // returns
2759 if (istate->prev() == NULL) {
2760 // We must be returning to a deoptimized frame (because popframe only happens between
2761 // two interpreted frames). We need to save the current arguments in C heap so that
2762 // the deoptimized frame when it restarts can copy the arguments to its expression
2763 // stack and re-execute the call. We also have to notify deoptimization that this
2764 // has occurred and to pick the preserved args copy them to the deoptimized frame's
2765 // java expression stack. Yuck.
2766 //
2767 THREAD->popframe_preserve_args(in_ByteSize(METHOD->size_of_parameters() * wordSize),
2768 LOCALS_SLOT(METHOD->size_of_parameters() - 1));
2769 THREAD->set_popframe_condition_bit(JavaThread::popframe_force_deopt_reexecution_bit);
2770 }
2771 THREAD->clr_pop_frame_in_process();
2772 }
2773
2774 // Normal return
2775 // Advance the pc and return to frame manager
2776 istate->set_msg(return_from_method);
2777 istate->set_return_kind((Bytecodes::Code)opcode);
2778 UPDATE_PC_AND_RETURN(1);
2779 } /* handle_return: */
2780
2781 // This is really a fatal error return
2782
2783 finish:
2784 DECACHE_TOS();
2785 DECACHE_PC();
2786
2787 return;
2788 }
2789
2790 /*
2791 * All the code following this point is only produced once and is not present
2792 * in the JVMTI version of the interpreter
2793 */
2794
2795 #ifndef VM_JVMTI
2796
2797 // This constructor should only be used to contruct the object to signal
2798 // interpreter initialization. All other instances should be created by
2799 // the frame manager.
2800 BytecodeInterpreter::BytecodeInterpreter(messages msg) {
2801 if (msg != initialize) ShouldNotReachHere();
2802 _msg = msg;
2803 _self_link = this;
2804 _prev_link = NULL;
2805 }
2806
2807 // Inline static functions for Java Stack and Local manipulation
2808
2809 // The implementations are platform dependent. We have to worry about alignment
2810 // issues on some machines which can change on the same platform depending on
2811 // whether it is an LP64 machine also.
2812 address BytecodeInterpreter::stack_slot(intptr_t *tos, int offset) {
2813 return (address) tos[Interpreter::expr_index_at(-offset)];
2814 }
2815
2816 jint BytecodeInterpreter::stack_int(intptr_t *tos, int offset) {
2817 return *((jint*) &tos[Interpreter::expr_index_at(-offset)]);
2818 }
2819
2820 jfloat BytecodeInterpreter::stack_float(intptr_t *tos, int offset) {
2821 return *((jfloat *) &tos[Interpreter::expr_index_at(-offset)]);
2822 }
2823
2824 oop BytecodeInterpreter::stack_object(intptr_t *tos, int offset) {
2825 return (oop)tos [Interpreter::expr_index_at(-offset)];
2826 }
2827
2828 jdouble BytecodeInterpreter::stack_double(intptr_t *tos, int offset) {
2829 return ((VMJavaVal64*) &tos[Interpreter::expr_index_at(-offset)])->d;
2830 }
2831
2832 jlong BytecodeInterpreter::stack_long(intptr_t *tos, int offset) {
2833 return ((VMJavaVal64 *) &tos[Interpreter::expr_index_at(-offset)])->l;
2834 }
2835
2836 // only used for value types
2837 void BytecodeInterpreter::set_stack_slot(intptr_t *tos, address value,
2838 int offset) {
2839 *((address *)&tos[Interpreter::expr_index_at(-offset)]) = value;
2840 }
2841
2842 void BytecodeInterpreter::set_stack_int(intptr_t *tos, int value,
2843 int offset) {
2844 *((jint *)&tos[Interpreter::expr_index_at(-offset)]) = value;
2845 }
2846
2847 void BytecodeInterpreter::set_stack_float(intptr_t *tos, jfloat value,
2848 int offset) {
2849 *((jfloat *)&tos[Interpreter::expr_index_at(-offset)]) = value;
2850 }
2851
2852 void BytecodeInterpreter::set_stack_object(intptr_t *tos, oop value,
2853 int offset) {
2854 *((oop *)&tos[Interpreter::expr_index_at(-offset)]) = value;
2855 }
2856
2857 // needs to be platform dep for the 32 bit platforms.
2858 void BytecodeInterpreter::set_stack_double(intptr_t *tos, jdouble value,
2859 int offset) {
2860 ((VMJavaVal64*)&tos[Interpreter::expr_index_at(-offset)])->d = value;
2861 }
2862
2863 void BytecodeInterpreter::set_stack_double_from_addr(intptr_t *tos,
2864 address addr, int offset) {
2865 (((VMJavaVal64*)&tos[Interpreter::expr_index_at(-offset)])->d =
2866 ((VMJavaVal64*)addr)->d);
2867 }
2868
2869 void BytecodeInterpreter::set_stack_long(intptr_t *tos, jlong value,
2870 int offset) {
2871 ((VMJavaVal64*)&tos[Interpreter::expr_index_at(-offset+1)])->l = 0xdeedbeeb;
2872 ((VMJavaVal64*)&tos[Interpreter::expr_index_at(-offset)])->l = value;
2873 }
2874
2875 void BytecodeInterpreter::set_stack_long_from_addr(intptr_t *tos,
2876 address addr, int offset) {
2877 ((VMJavaVal64*)&tos[Interpreter::expr_index_at(-offset+1)])->l = 0xdeedbeeb;
2878 ((VMJavaVal64*)&tos[Interpreter::expr_index_at(-offset)])->l =
2879 ((VMJavaVal64*)addr)->l;
2880 }
2881
2882 // Locals
2883
2884 address BytecodeInterpreter::locals_slot(intptr_t* locals, int offset) {
2885 return (address)locals[Interpreter::local_index_at(-offset)];
2886 }
2887 jint BytecodeInterpreter::locals_int(intptr_t* locals, int offset) {
2888 return (jint)locals[Interpreter::local_index_at(-offset)];
2889 }
2890 jfloat BytecodeInterpreter::locals_float(intptr_t* locals, int offset) {
2891 return (jfloat)locals[Interpreter::local_index_at(-offset)];
2892 }
2893 oop BytecodeInterpreter::locals_object(intptr_t* locals, int offset) {
2894 return (oop)locals[Interpreter::local_index_at(-offset)];
2895 }
2896 jdouble BytecodeInterpreter::locals_double(intptr_t* locals, int offset) {
2897 return ((VMJavaVal64*)&locals[Interpreter::local_index_at(-(offset+1))])->d;
2898 }
2899 jlong BytecodeInterpreter::locals_long(intptr_t* locals, int offset) {
2900 return ((VMJavaVal64*)&locals[Interpreter::local_index_at(-(offset+1))])->l;
2901 }
2902
2903 // Returns the address of locals value.
2904 address BytecodeInterpreter::locals_long_at(intptr_t* locals, int offset) {
2905 return ((address)&locals[Interpreter::local_index_at(-(offset+1))]);
2906 }
2907 address BytecodeInterpreter::locals_double_at(intptr_t* locals, int offset) {
2908 return ((address)&locals[Interpreter::local_index_at(-(offset+1))]);
2909 }
2910
2911 // Used for local value or returnAddress
2912 void BytecodeInterpreter::set_locals_slot(intptr_t *locals,
2913 address value, int offset) {
2914 *((address*)&locals[Interpreter::local_index_at(-offset)]) = value;
2915 }
2916 void BytecodeInterpreter::set_locals_int(intptr_t *locals,
2917 jint value, int offset) {
2918 *((jint *)&locals[Interpreter::local_index_at(-offset)]) = value;
2919 }
2920 void BytecodeInterpreter::set_locals_float(intptr_t *locals,
2921 jfloat value, int offset) {
2922 *((jfloat *)&locals[Interpreter::local_index_at(-offset)]) = value;
2923 }
2924 void BytecodeInterpreter::set_locals_object(intptr_t *locals,
2925 oop value, int offset) {
2926 *((oop *)&locals[Interpreter::local_index_at(-offset)]) = value;
2927 }
2928 void BytecodeInterpreter::set_locals_double(intptr_t *locals,
2929 jdouble value, int offset) {
2930 ((VMJavaVal64*)&locals[Interpreter::local_index_at(-(offset+1))])->d = value;
2931 }
2932 void BytecodeInterpreter::set_locals_long(intptr_t *locals,
2933 jlong value, int offset) {
2934 ((VMJavaVal64*)&locals[Interpreter::local_index_at(-(offset+1))])->l = value;
2935 }
2936 void BytecodeInterpreter::set_locals_double_from_addr(intptr_t *locals,
2937 address addr, int offset) {
2938 ((VMJavaVal64*)&locals[Interpreter::local_index_at(-(offset+1))])->d = ((VMJavaVal64*)addr)->d;
2939 }
2940 void BytecodeInterpreter::set_locals_long_from_addr(intptr_t *locals,
2941 address addr, int offset) {
2942 ((VMJavaVal64*)&locals[Interpreter::local_index_at(-(offset+1))])->l = ((VMJavaVal64*)addr)->l;
2943 }
2944
2945 void BytecodeInterpreter::astore(intptr_t* tos, int stack_offset,
2946 intptr_t* locals, int locals_offset) {
2947 intptr_t value = tos[Interpreter::expr_index_at(-stack_offset)];
2948 locals[Interpreter::local_index_at(-locals_offset)] = value;
2949 }
2950
2951
2952 void BytecodeInterpreter::copy_stack_slot(intptr_t *tos, int from_offset,
2953 int to_offset) {
2954 tos[Interpreter::expr_index_at(-to_offset)] =
2955 (intptr_t)tos[Interpreter::expr_index_at(-from_offset)];
2956 }
2957
2958 void BytecodeInterpreter::dup(intptr_t *tos) {
2959 copy_stack_slot(tos, -1, 0);
2960 }
2961 void BytecodeInterpreter::dup2(intptr_t *tos) {
2962 copy_stack_slot(tos, -2, 0);
2963 copy_stack_slot(tos, -1, 1);
2964 }
2965
2966 void BytecodeInterpreter::dup_x1(intptr_t *tos) {
2967 /* insert top word two down */
2968 copy_stack_slot(tos, -1, 0);
2969 copy_stack_slot(tos, -2, -1);
2970 copy_stack_slot(tos, 0, -2);
2971 }
2972
2973 void BytecodeInterpreter::dup_x2(intptr_t *tos) {
2974 /* insert top word three down */
2975 copy_stack_slot(tos, -1, 0);
2976 copy_stack_slot(tos, -2, -1);
2977 copy_stack_slot(tos, -3, -2);
2978 copy_stack_slot(tos, 0, -3);
2979 }
2980 void BytecodeInterpreter::dup2_x1(intptr_t *tos) {
2981 /* insert top 2 slots three down */
2982 copy_stack_slot(tos, -1, 1);
2983 copy_stack_slot(tos, -2, 0);
2984 copy_stack_slot(tos, -3, -1);
2985 copy_stack_slot(tos, 1, -2);
2986 copy_stack_slot(tos, 0, -3);
2987 }
2988 void BytecodeInterpreter::dup2_x2(intptr_t *tos) {
2989 /* insert top 2 slots four down */
2990 copy_stack_slot(tos, -1, 1);
2991 copy_stack_slot(tos, -2, 0);
2992 copy_stack_slot(tos, -3, -1);
2993 copy_stack_slot(tos, -4, -2);
2994 copy_stack_slot(tos, 1, -3);
2995 copy_stack_slot(tos, 0, -4);
2996 }
2997
2998
2999 void BytecodeInterpreter::swap(intptr_t *tos) {
3000 // swap top two elements
3001 intptr_t val = tos[Interpreter::expr_index_at(1)];
3002 // Copy -2 entry to -1
3003 copy_stack_slot(tos, -2, -1);
3004 // Store saved -1 entry into -2
3005 tos[Interpreter::expr_index_at(2)] = val;
3006 }
3007 // --------------------------------------------------------------------------------
3008 // Non-product code
3009 #ifndef PRODUCT
3010
3011 const char* BytecodeInterpreter::C_msg(BytecodeInterpreter::messages msg) {
3012 switch (msg) {
3013 case BytecodeInterpreter::no_request: return("no_request");
3014 case BytecodeInterpreter::initialize: return("initialize");
3015 // status message to C++ interpreter
3016 case BytecodeInterpreter::method_entry: return("method_entry");
3017 case BytecodeInterpreter::method_resume: return("method_resume");
3018 case BytecodeInterpreter::got_monitors: return("got_monitors");
3019 case BytecodeInterpreter::rethrow_exception: return("rethrow_exception");
3020 // requests to frame manager from C++ interpreter
3021 case BytecodeInterpreter::call_method: return("call_method");
3022 case BytecodeInterpreter::return_from_method: return("return_from_method");
3023 case BytecodeInterpreter::more_monitors: return("more_monitors");
3024 case BytecodeInterpreter::throwing_exception: return("throwing_exception");
3025 case BytecodeInterpreter::popping_frame: return("popping_frame");
3026 case BytecodeInterpreter::do_osr: return("do_osr");
3027 // deopt
3028 case BytecodeInterpreter::deopt_resume: return("deopt_resume");
3029 case BytecodeInterpreter::deopt_resume2: return("deopt_resume2");
3030 default: return("BAD MSG");
3031 }
3032 }
3033 void
3034 BytecodeInterpreter::print() {
3035 tty->print_cr("thread: " INTPTR_FORMAT, (uintptr_t) this->_thread);
3036 tty->print_cr("bcp: " INTPTR_FORMAT, (uintptr_t) this->_bcp);
3037 tty->print_cr("locals: " INTPTR_FORMAT, (uintptr_t) this->_locals);
3038 tty->print_cr("constants: " INTPTR_FORMAT, (uintptr_t) this->_constants);
3039 {
3040 ResourceMark rm;
3041 char *method_name = _method->name_and_sig_as_C_string();
3042 tty->print_cr("method: " INTPTR_FORMAT "[ %s ]", (uintptr_t) this->_method, method_name);
3043 }
3044 tty->print_cr("mdx: " INTPTR_FORMAT, (uintptr_t) this->_mdx);
3045 tty->print_cr("stack: " INTPTR_FORMAT, (uintptr_t) this->_stack);
3046 tty->print_cr("msg: %s", C_msg(this->_msg));
3047 tty->print_cr("result_to_call._callee: " INTPTR_FORMAT, (uintptr_t) this->_result._to_call._callee);
3048 tty->print_cr("result_to_call._callee_entry_point: " INTPTR_FORMAT, (uintptr_t) this->_result._to_call._callee_entry_point);
3049 tty->print_cr("result_to_call._bcp_advance: %d ", this->_result._to_call._bcp_advance);
3050 tty->print_cr("osr._osr_buf: " INTPTR_FORMAT, (uintptr_t) this->_result._osr._osr_buf);
3051 tty->print_cr("osr._osr_entry: " INTPTR_FORMAT, (uintptr_t) this->_result._osr._osr_entry);
3052 tty->print_cr("result_return_kind 0x%x ", (int) this->_result._return_kind);
3053 tty->print_cr("prev_link: " INTPTR_FORMAT, (uintptr_t) this->_prev_link);
3054 tty->print_cr("native_mirror: " INTPTR_FORMAT, (uintptr_t) this->_oop_temp);
3055 tty->print_cr("stack_base: " INTPTR_FORMAT, (uintptr_t) this->_stack_base);
3056 tty->print_cr("stack_limit: " INTPTR_FORMAT, (uintptr_t) this->_stack_limit);
3057 tty->print_cr("monitor_base: " INTPTR_FORMAT, (uintptr_t) this->_monitor_base);
3058 #ifdef SPARC
3059 tty->print_cr("last_Java_pc: " INTPTR_FORMAT, (uintptr_t) this->_last_Java_pc);
3060 tty->print_cr("frame_bottom: " INTPTR_FORMAT, (uintptr_t) this->_frame_bottom);
3061 tty->print_cr("&native_fresult: " INTPTR_FORMAT, (uintptr_t) &this->_native_fresult);
3062 tty->print_cr("native_lresult: " INTPTR_FORMAT, (uintptr_t) this->_native_lresult);
3063 #endif
3064 #if defined(IA64) && !defined(ZERO)
3065 tty->print_cr("last_Java_fp: " INTPTR_FORMAT, (uintptr_t) this->_last_Java_fp);
3066 #endif // IA64 && !ZERO
3067 tty->print_cr("self_link: " INTPTR_FORMAT, (uintptr_t) this->_self_link);
3068 }
3069
3070 extern "C" {
3071 void PI(uintptr_t arg) {
3072 ((BytecodeInterpreter*)arg)->print();
3073 }
3074 }
3075 #endif // PRODUCT
3076
3077 #endif // JVMTI
3078 #endif // CC_INTERP