1 /*
2 * Copyright (c) 2002, 2012, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
23 */
24
25 // no precompiled headers
26 #include "classfile/vmSymbols.hpp"
27 #include "gc_interface/collectedHeap.hpp"
28 #include "interpreter/bytecodeHistogram.hpp"
29 #include "interpreter/bytecodeInterpreter.hpp"
30 #include "interpreter/bytecodeInterpreter.inline.hpp"
31 #include "interpreter/interpreter.hpp"
32 #include "interpreter/interpreterRuntime.hpp"
33 #include "memory/cardTableModRefBS.hpp"
34 #include "memory/resourceArea.hpp"
35 #include "oops/methodCounters.hpp"
36 #include "oops/objArrayKlass.hpp"
37 #include "oops/oop.inline.hpp"
38 #include "prims/jvmtiExport.hpp"
39 #include "runtime/frame.inline.hpp"
40 #include "runtime/handles.inline.hpp"
41 #include "runtime/interfaceSupport.hpp"
42 #include "runtime/sharedRuntime.hpp"
43 #include "runtime/threadCritical.hpp"
44 #include "utilities/exceptions.hpp"
45 #ifdef TARGET_OS_ARCH_linux_x86
46 # include "orderAccess_linux_x86.inline.hpp"
47 #endif
48 #ifdef TARGET_OS_ARCH_linux_sparc
49 # include "orderAccess_linux_sparc.inline.hpp"
50 #endif
51 #ifdef TARGET_OS_ARCH_linux_zero
52 # include "orderAccess_linux_zero.inline.hpp"
53 #endif
54 #ifdef TARGET_OS_ARCH_solaris_x86
55 # include "orderAccess_solaris_x86.inline.hpp"
56 #endif
57 #ifdef TARGET_OS_ARCH_solaris_sparc
58 # include "orderAccess_solaris_sparc.inline.hpp"
59 #endif
60 #ifdef TARGET_OS_ARCH_windows_x86
61 # include "orderAccess_windows_x86.inline.hpp"
62 #endif
63 #ifdef TARGET_OS_ARCH_linux_arm
64 # include "orderAccess_linux_arm.inline.hpp"
65 #endif
66 #ifdef TARGET_OS_ARCH_linux_ppc
67 # include "orderAccess_linux_ppc.inline.hpp"
68 #endif
69 #ifdef TARGET_OS_ARCH_bsd_x86
70 # include "orderAccess_bsd_x86.inline.hpp"
71 #endif
72 #ifdef TARGET_OS_ARCH_bsd_zero
73 # include "orderAccess_bsd_zero.inline.hpp"
74 #endif
75
76
77 // no precompiled headers
78 #ifdef CC_INTERP
79
80 /*
81 * USELABELS - If using GCC, then use labels for the opcode dispatching
82 * rather -then a switch statement. This improves performance because it
83 * gives us the oportunity to have the instructions that calculate the
84 * next opcode to jump to be intermixed with the rest of the instructions
85 * that implement the opcode (see UPDATE_PC_AND_TOS_AND_CONTINUE macro).
86 */
87 #undef USELABELS
88 #ifdef __GNUC__
89 /*
90 ASSERT signifies debugging. It is much easier to step thru bytecodes if we
91 don't use the computed goto approach.
92 */
93 #ifndef ASSERT
94 #define USELABELS
95 #endif
96 #endif
97
98 #undef CASE
99 #ifdef USELABELS
100 #define CASE(opcode) opc ## opcode
101 #define DEFAULT opc_default
102 #else
103 #define CASE(opcode) case Bytecodes:: opcode
104 #define DEFAULT default
105 #endif
106
107 /*
108 * PREFETCH_OPCCODE - Some compilers do better if you prefetch the next
109 * opcode before going back to the top of the while loop, rather then having
110 * the top of the while loop handle it. This provides a better opportunity
111 * for instruction scheduling. Some compilers just do this prefetch
112 * automatically. Some actually end up with worse performance if you
113 * force the prefetch. Solaris gcc seems to do better, but cc does worse.
114 */
115 #undef PREFETCH_OPCCODE
116 #define PREFETCH_OPCCODE
117
118 /*
119 Interpreter safepoint: it is expected that the interpreter will have no live
120 handles of its own creation live at an interpreter safepoint. Therefore we
121 run a HandleMarkCleaner and trash all handles allocated in the call chain
122 since the JavaCalls::call_helper invocation that initiated the chain.
123 There really shouldn't be any handles remaining to trash but this is cheap
124 in relation to a safepoint.
125 */
126 #define SAFEPOINT \
127 if ( SafepointSynchronize::is_synchronizing()) { \
128 { \
129 /* zap freed handles rather than GC'ing them */ \
130 HandleMarkCleaner __hmc(THREAD); \
131 } \
132 CALL_VM(SafepointSynchronize::block(THREAD), handle_exception); \
133 }
134
135 /*
136 * VM_JAVA_ERROR - Macro for throwing a java exception from
137 * the interpreter loop. Should really be a CALL_VM but there
138 * is no entry point to do the transition to vm so we just
139 * do it by hand here.
140 */
141 #define VM_JAVA_ERROR_NO_JUMP(name, msg) \
142 DECACHE_STATE(); \
143 SET_LAST_JAVA_FRAME(); \
144 { \
145 ThreadInVMfromJava trans(THREAD); \
146 Exceptions::_throw_msg(THREAD, __FILE__, __LINE__, name, msg); \
147 } \
148 RESET_LAST_JAVA_FRAME(); \
149 CACHE_STATE();
150
151 // Normal throw of a java error
152 #define VM_JAVA_ERROR(name, msg) \
153 VM_JAVA_ERROR_NO_JUMP(name, msg) \
154 goto handle_exception;
155
156 #ifdef PRODUCT
157 #define DO_UPDATE_INSTRUCTION_COUNT(opcode)
158 #else
159 #define DO_UPDATE_INSTRUCTION_COUNT(opcode) \
160 { \
161 BytecodeCounter::_counter_value++; \
162 BytecodeHistogram::_counters[(Bytecodes::Code)opcode]++; \
163 if (StopInterpreterAt && StopInterpreterAt == BytecodeCounter::_counter_value) os::breakpoint(); \
164 if (TraceBytecodes) { \
165 CALL_VM((void)SharedRuntime::trace_bytecode(THREAD, 0, \
166 topOfStack[Interpreter::expr_index_at(1)], \
167 topOfStack[Interpreter::expr_index_at(2)]), \
168 handle_exception); \
169 } \
170 }
171 #endif
172
173 #undef DEBUGGER_SINGLE_STEP_NOTIFY
174 #ifdef VM_JVMTI
175 /* NOTE: (kbr) This macro must be called AFTER the PC has been
176 incremented. JvmtiExport::at_single_stepping_point() may cause a
177 breakpoint opcode to get inserted at the current PC to allow the
178 debugger to coalesce single-step events.
179
180 As a result if we call at_single_stepping_point() we refetch opcode
181 to get the current opcode. This will override any other prefetching
182 that might have occurred.
183 */
184 #define DEBUGGER_SINGLE_STEP_NOTIFY() \
185 { \
186 if (_jvmti_interp_events) { \
187 if (JvmtiExport::should_post_single_step()) { \
188 DECACHE_STATE(); \
189 SET_LAST_JAVA_FRAME(); \
190 ThreadInVMfromJava trans(THREAD); \
191 JvmtiExport::at_single_stepping_point(THREAD, \
192 istate->method(), \
193 pc); \
194 RESET_LAST_JAVA_FRAME(); \
195 CACHE_STATE(); \
196 if (THREAD->pop_frame_pending() && \
197 !THREAD->pop_frame_in_process()) { \
198 goto handle_Pop_Frame; \
199 } \
200 opcode = *pc; \
201 } \
202 } \
203 }
204 #else
205 #define DEBUGGER_SINGLE_STEP_NOTIFY()
206 #endif
207
208 /*
209 * CONTINUE - Macro for executing the next opcode.
210 */
211 #undef CONTINUE
212 #ifdef USELABELS
213 // Have to do this dispatch this way in C++ because otherwise gcc complains about crossing an
214 // initialization (which is is the initialization of the table pointer...)
215 #define DISPATCH(opcode) goto *(void*)dispatch_table[opcode]
216 #define CONTINUE { \
217 opcode = *pc; \
218 DO_UPDATE_INSTRUCTION_COUNT(opcode); \
219 DEBUGGER_SINGLE_STEP_NOTIFY(); \
220 DISPATCH(opcode); \
221 }
222 #else
223 #ifdef PREFETCH_OPCCODE
224 #define CONTINUE { \
225 opcode = *pc; \
226 DO_UPDATE_INSTRUCTION_COUNT(opcode); \
227 DEBUGGER_SINGLE_STEP_NOTIFY(); \
228 continue; \
229 }
230 #else
231 #define CONTINUE { \
232 DO_UPDATE_INSTRUCTION_COUNT(opcode); \
233 DEBUGGER_SINGLE_STEP_NOTIFY(); \
234 continue; \
235 }
236 #endif
237 #endif
238
239
240 #define UPDATE_PC(opsize) {pc += opsize; }
241 /*
242 * UPDATE_PC_AND_TOS - Macro for updating the pc and topOfStack.
243 */
244 #undef UPDATE_PC_AND_TOS
245 #define UPDATE_PC_AND_TOS(opsize, stack) \
246 {pc += opsize; MORE_STACK(stack); }
247
248 /*
249 * UPDATE_PC_AND_TOS_AND_CONTINUE - Macro for updating the pc and topOfStack,
250 * and executing the next opcode. It's somewhat similar to the combination
251 * of UPDATE_PC_AND_TOS and CONTINUE, but with some minor optimizations.
252 */
253 #undef UPDATE_PC_AND_TOS_AND_CONTINUE
254 #ifdef USELABELS
255 #define UPDATE_PC_AND_TOS_AND_CONTINUE(opsize, stack) { \
256 pc += opsize; opcode = *pc; MORE_STACK(stack); \
257 DO_UPDATE_INSTRUCTION_COUNT(opcode); \
258 DEBUGGER_SINGLE_STEP_NOTIFY(); \
259 DISPATCH(opcode); \
260 }
261
262 #define UPDATE_PC_AND_CONTINUE(opsize) { \
263 pc += opsize; opcode = *pc; \
264 DO_UPDATE_INSTRUCTION_COUNT(opcode); \
265 DEBUGGER_SINGLE_STEP_NOTIFY(); \
266 DISPATCH(opcode); \
267 }
268 #else
269 #ifdef PREFETCH_OPCCODE
270 #define UPDATE_PC_AND_TOS_AND_CONTINUE(opsize, stack) { \
271 pc += opsize; opcode = *pc; MORE_STACK(stack); \
272 DO_UPDATE_INSTRUCTION_COUNT(opcode); \
273 DEBUGGER_SINGLE_STEP_NOTIFY(); \
274 goto do_continue; \
275 }
276
277 #define UPDATE_PC_AND_CONTINUE(opsize) { \
278 pc += opsize; opcode = *pc; \
279 DO_UPDATE_INSTRUCTION_COUNT(opcode); \
280 DEBUGGER_SINGLE_STEP_NOTIFY(); \
281 goto do_continue; \
282 }
283 #else
284 #define UPDATE_PC_AND_TOS_AND_CONTINUE(opsize, stack) { \
285 pc += opsize; MORE_STACK(stack); \
286 DO_UPDATE_INSTRUCTION_COUNT(opcode); \
287 DEBUGGER_SINGLE_STEP_NOTIFY(); \
288 goto do_continue; \
289 }
290
291 #define UPDATE_PC_AND_CONTINUE(opsize) { \
292 pc += opsize; \
293 DO_UPDATE_INSTRUCTION_COUNT(opcode); \
294 DEBUGGER_SINGLE_STEP_NOTIFY(); \
295 goto do_continue; \
296 }
297 #endif /* PREFETCH_OPCCODE */
298 #endif /* USELABELS */
299
300 // About to call a new method, update the save the adjusted pc and return to frame manager
301 #define UPDATE_PC_AND_RETURN(opsize) \
302 DECACHE_TOS(); \
303 istate->set_bcp(pc+opsize); \
304 return;
305
306
307 #define METHOD istate->method()
308 #define GET_METHOD_COUNTERS(res) \
309 res = METHOD->method_counters(); \
310 if (res == NULL) { \
311 CALL_VM(res = InterpreterRuntime::build_method_counters(THREAD, METHOD), handle_exception); \
312 }
313
314 #define OSR_REQUEST(res, branch_pc) \
315 CALL_VM(res=InterpreterRuntime::frequency_counter_overflow(THREAD, branch_pc), handle_exception);
316 /*
317 * For those opcodes that need to have a GC point on a backwards branch
318 */
319
320 // Backedge counting is kind of strange. The asm interpreter will increment
321 // the backedge counter as a separate counter but it does it's comparisons
322 // to the sum (scaled) of invocation counter and backedge count to make
323 // a decision. Seems kind of odd to sum them together like that
324
325 // skip is delta from current bcp/bci for target, branch_pc is pre-branch bcp
326
327
328 #define DO_BACKEDGE_CHECKS(skip, branch_pc) \
329 if ((skip) <= 0) { \
330 MethodCounters* mcs; \
331 GET_METHOD_COUNTERS(mcs); \
332 if (UseLoopCounter) { \
333 bool do_OSR = UseOnStackReplacement; \
334 mcs->backedge_counter()->increment(); \
335 if (do_OSR) do_OSR = mcs->backedge_counter()->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 mcs->invocation_counter()->increment(); \
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 // We have a problem here if we are running with a pre-hsx24 JDK (for example during bootstrap)
472 // because in that case, EnableInvokeDynamic is true by default but will be later switched off
473 // if java_lang_invoke_MethodHandle::compute_offsets() detects that the JDK only has the classes
474 // for the old JSR292 implementation.
475 // This leads to a situation where 'istate->_stack_limit' always accounts for
476 // methodOopDesc::extra_stack_entries() because it is computed in
477 // CppInterpreterGenerator::generate_compute_interpreter_state() which was generated while
478 // EnableInvokeDynamic was still true. On the other hand, istate->_method->max_stack() doesn't
479 // account for extra_stack_entries() anymore because at the time when it is called
480 // EnableInvokeDynamic was already set to false.
481 // So we have a second version of the assertion which handles the case where EnableInvokeDynamic was
482 // switched off because of the wrong classes.
483 if (EnableInvokeDynamic || FLAG_IS_CMDLINE(EnableInvokeDynamic)) {
484 assert(abs(istate->_stack_base - istate->_stack_limit) == (istate->_method->max_stack() + 1), "bad stack limit");
485 } else {
486 const int extra_stack_entries = Method::extra_stack_entries_for_indy;
487 assert(labs(istate->_stack_base - istate->_stack_limit) == (istate->_method->max_stack() + extra_stack_entries
488 + 1), "bad stack limit");
489 }
490 #ifndef SHARK
491 IA32_ONLY(assert(istate->_stack_limit == istate->_thread->last_Java_sp() + 1, "wrong"));
492 #endif // !SHARK
493 }
494 // Verify linkages.
495 interpreterState l = istate;
496 do {
497 assert(l == l->_self_link, "bad link");
498 l = l->_prev_link;
499 } while (l != NULL);
500 // Screwups with stack management usually cause us to overwrite istate
501 // save a copy so we can verify it.
502 interpreterState orig = istate;
503 #endif
504
505 static volatile jbyte* _byte_map_base; // adjusted card table base for oop store barrier
506
507 register intptr_t* topOfStack = (intptr_t *)istate->stack(); /* access with STACK macros */
508 register address pc = istate->bcp();
509 register jubyte opcode;
510 register intptr_t* locals = istate->locals();
511 register ConstantPoolCache* cp = istate->constants(); // method()->constants()->cache()
512 #ifdef LOTS_OF_REGS
513 register JavaThread* THREAD = istate->thread();
514 register volatile jbyte* BYTE_MAP_BASE = _byte_map_base;
515 #else
516 #undef THREAD
517 #define THREAD istate->thread()
518 #undef BYTE_MAP_BASE
519 #define BYTE_MAP_BASE _byte_map_base
520 #endif
521
522 #ifdef USELABELS
523 const static void* const opclabels_data[256] = {
524 /* 0x00 */ &&opc_nop, &&opc_aconst_null,&&opc_iconst_m1,&&opc_iconst_0,
525 /* 0x04 */ &&opc_iconst_1,&&opc_iconst_2, &&opc_iconst_3, &&opc_iconst_4,
526 /* 0x08 */ &&opc_iconst_5,&&opc_lconst_0, &&opc_lconst_1, &&opc_fconst_0,
527 /* 0x0C */ &&opc_fconst_1,&&opc_fconst_2, &&opc_dconst_0, &&opc_dconst_1,
528
529 /* 0x10 */ &&opc_bipush, &&opc_sipush, &&opc_ldc, &&opc_ldc_w,
530 /* 0x14 */ &&opc_ldc2_w, &&opc_iload, &&opc_lload, &&opc_fload,
531 /* 0x18 */ &&opc_dload, &&opc_aload, &&opc_iload_0,&&opc_iload_1,
532 /* 0x1C */ &&opc_iload_2,&&opc_iload_3,&&opc_lload_0,&&opc_lload_1,
533
534 /* 0x20 */ &&opc_lload_2,&&opc_lload_3,&&opc_fload_0,&&opc_fload_1,
535 /* 0x24 */ &&opc_fload_2,&&opc_fload_3,&&opc_dload_0,&&opc_dload_1,
536 /* 0x28 */ &&opc_dload_2,&&opc_dload_3,&&opc_aload_0,&&opc_aload_1,
537 /* 0x2C */ &&opc_aload_2,&&opc_aload_3,&&opc_iaload, &&opc_laload,
538
539 /* 0x30 */ &&opc_faload, &&opc_daload, &&opc_aaload, &&opc_baload,
540 /* 0x34 */ &&opc_caload, &&opc_saload, &&opc_istore, &&opc_lstore,
541 /* 0x38 */ &&opc_fstore, &&opc_dstore, &&opc_astore, &&opc_istore_0,
542 /* 0x3C */ &&opc_istore_1,&&opc_istore_2,&&opc_istore_3,&&opc_lstore_0,
543
544 /* 0x40 */ &&opc_lstore_1,&&opc_lstore_2,&&opc_lstore_3,&&opc_fstore_0,
545 /* 0x44 */ &&opc_fstore_1,&&opc_fstore_2,&&opc_fstore_3,&&opc_dstore_0,
546 /* 0x48 */ &&opc_dstore_1,&&opc_dstore_2,&&opc_dstore_3,&&opc_astore_0,
547 /* 0x4C */ &&opc_astore_1,&&opc_astore_2,&&opc_astore_3,&&opc_iastore,
548
549 /* 0x50 */ &&opc_lastore,&&opc_fastore,&&opc_dastore,&&opc_aastore,
550 /* 0x54 */ &&opc_bastore,&&opc_castore,&&opc_sastore,&&opc_pop,
551 /* 0x58 */ &&opc_pop2, &&opc_dup, &&opc_dup_x1, &&opc_dup_x2,
552 /* 0x5C */ &&opc_dup2, &&opc_dup2_x1,&&opc_dup2_x2,&&opc_swap,
553
554 /* 0x60 */ &&opc_iadd,&&opc_ladd,&&opc_fadd,&&opc_dadd,
555 /* 0x64 */ &&opc_isub,&&opc_lsub,&&opc_fsub,&&opc_dsub,
556 /* 0x68 */ &&opc_imul,&&opc_lmul,&&opc_fmul,&&opc_dmul,
557 /* 0x6C */ &&opc_idiv,&&opc_ldiv,&&opc_fdiv,&&opc_ddiv,
558
559 /* 0x70 */ &&opc_irem, &&opc_lrem, &&opc_frem,&&opc_drem,
560 /* 0x74 */ &&opc_ineg, &&opc_lneg, &&opc_fneg,&&opc_dneg,
561 /* 0x78 */ &&opc_ishl, &&opc_lshl, &&opc_ishr,&&opc_lshr,
562 /* 0x7C */ &&opc_iushr,&&opc_lushr,&&opc_iand,&&opc_land,
563
564 /* 0x80 */ &&opc_ior, &&opc_lor,&&opc_ixor,&&opc_lxor,
565 /* 0x84 */ &&opc_iinc,&&opc_i2l,&&opc_i2f, &&opc_i2d,
566 /* 0x88 */ &&opc_l2i, &&opc_l2f,&&opc_l2d, &&opc_f2i,
567 /* 0x8C */ &&opc_f2l, &&opc_f2d,&&opc_d2i, &&opc_d2l,
568
569 /* 0x90 */ &&opc_d2f, &&opc_i2b, &&opc_i2c, &&opc_i2s,
570 /* 0x94 */ &&opc_lcmp, &&opc_fcmpl,&&opc_fcmpg,&&opc_dcmpl,
571 /* 0x98 */ &&opc_dcmpg,&&opc_ifeq, &&opc_ifne, &&opc_iflt,
572 /* 0x9C */ &&opc_ifge, &&opc_ifgt, &&opc_ifle, &&opc_if_icmpeq,
573
574 /* 0xA0 */ &&opc_if_icmpne,&&opc_if_icmplt,&&opc_if_icmpge, &&opc_if_icmpgt,
575 /* 0xA4 */ &&opc_if_icmple,&&opc_if_acmpeq,&&opc_if_acmpne, &&opc_goto,
576 /* 0xA8 */ &&opc_jsr, &&opc_ret, &&opc_tableswitch,&&opc_lookupswitch,
577 /* 0xAC */ &&opc_ireturn, &&opc_lreturn, &&opc_freturn, &&opc_dreturn,
578
579 /* 0xB0 */ &&opc_areturn, &&opc_return, &&opc_getstatic, &&opc_putstatic,
580 /* 0xB4 */ &&opc_getfield, &&opc_putfield, &&opc_invokevirtual,&&opc_invokespecial,
581 /* 0xB8 */ &&opc_invokestatic,&&opc_invokeinterface,&&opc_invokedynamic,&&opc_new,
582 /* 0xBC */ &&opc_newarray, &&opc_anewarray, &&opc_arraylength, &&opc_athrow,
583
584 /* 0xC0 */ &&opc_checkcast, &&opc_instanceof, &&opc_monitorenter, &&opc_monitorexit,
585 /* 0xC4 */ &&opc_wide, &&opc_multianewarray, &&opc_ifnull, &&opc_ifnonnull,
586 /* 0xC8 */ &&opc_goto_w, &&opc_jsr_w, &&opc_breakpoint, &&opc_default,
587 /* 0xCC */ &&opc_default, &&opc_default, &&opc_default, &&opc_default,
588
589 /* 0xD0 */ &&opc_default, &&opc_default, &&opc_default, &&opc_default,
590 /* 0xD4 */ &&opc_default, &&opc_default, &&opc_default, &&opc_default,
591 /* 0xD8 */ &&opc_default, &&opc_default, &&opc_default, &&opc_default,
592 /* 0xDC */ &&opc_default, &&opc_default, &&opc_default, &&opc_default,
593
594 /* 0xE0 */ &&opc_default, &&opc_default, &&opc_default, &&opc_default,
595 /* 0xE4 */ &&opc_default, &&opc_fast_aldc, &&opc_fast_aldc_w, &&opc_return_register_finalizer,
596 /* 0xE8 */ &&opc_invokehandle,&&opc_default, &&opc_default, &&opc_default,
597 /* 0xEC */ &&opc_default, &&opc_default, &&opc_default, &&opc_default,
598
599 /* 0xF0 */ &&opc_default, &&opc_default, &&opc_default, &&opc_default,
600 /* 0xF4 */ &&opc_default, &&opc_default, &&opc_default, &&opc_default,
601 /* 0xF8 */ &&opc_default, &&opc_default, &&opc_default, &&opc_default,
602 /* 0xFC */ &&opc_default, &&opc_default, &&opc_default, &&opc_default
603 };
604 register uintptr_t *dispatch_table = (uintptr_t*)&opclabels_data[0];
605 #endif /* USELABELS */
606
607 #ifdef ASSERT
608 // this will trigger a VERIFY_OOP on entry
609 if (istate->msg() != initialize && ! METHOD->is_static()) {
610 oop rcvr = LOCALS_OBJECT(0);
611 VERIFY_OOP(rcvr);
612 }
613 #endif
614 // #define HACK
615 #ifdef HACK
616 bool interesting = false;
617 #endif // HACK
618
619 /* QQQ this should be a stack method so we don't know actual direction */
620 guarantee(istate->msg() == initialize ||
621 topOfStack >= istate->stack_limit() &&
622 topOfStack < istate->stack_base(),
623 "Stack top out of range");
624
625 switch (istate->msg()) {
626 case initialize: {
627 if (initialized++) ShouldNotReachHere(); // Only one initialize call
628 _compiling = (UseCompiler || CountCompiledCalls);
629 #ifdef VM_JVMTI
630 _jvmti_interp_events = JvmtiExport::can_post_interpreter_events();
631 #endif
632 BarrierSet* bs = Universe::heap()->barrier_set();
633 assert(bs->kind() == BarrierSet::CardTableModRef, "Wrong barrier set kind");
634 _byte_map_base = (volatile jbyte*)(((CardTableModRefBS*)bs)->byte_map_base);
635 return;
636 }
637 break;
638 case method_entry: {
639 THREAD->set_do_not_unlock();
640 // count invocations
641 assert(initialized, "Interpreter not initialized");
642 if (_compiling) {
643 MethodCounters* mcs;
644 GET_METHOD_COUNTERS(mcs);
645 if (ProfileInterpreter) {
646 METHOD->increment_interpreter_invocation_count(THREAD);
647 }
648 mcs->invocation_counter()->increment();
649 if (mcs->invocation_counter()->reached_InvocationLimit()) {
650 CALL_VM((void)InterpreterRuntime::frequency_counter_overflow(THREAD, NULL), handle_exception);
651
652 // We no longer retry on a counter overflow
653
654 // istate->set_msg(retry_method);
655 // THREAD->clr_do_not_unlock();
656 // return;
657 }
658 SAFEPOINT;
659 }
660
661 if ((istate->_stack_base - istate->_stack_limit) != istate->method()->max_stack() + 1) {
662 // initialize
663 os::breakpoint();
664 }
665
666 #ifdef HACK
667 {
668 ResourceMark rm;
669 char *method_name = istate->method()->name_and_sig_as_C_string();
670 if (strstr(method_name, "runThese$TestRunner.run()V") != NULL) {
671 tty->print_cr("entering: depth %d bci: %d",
672 (istate->_stack_base - istate->_stack),
673 istate->_bcp - istate->_method->code_base());
674 interesting = true;
675 }
676 }
677 #endif // HACK
678
679
680 // lock method if synchronized
681 if (METHOD->is_synchronized()) {
682 // oop rcvr = locals[0].j.r;
683 oop rcvr;
684 if (METHOD->is_static()) {
685 rcvr = METHOD->constants()->pool_holder()->java_mirror();
686 } else {
687 rcvr = LOCALS_OBJECT(0);
688 VERIFY_OOP(rcvr);
689 }
690 // The initial monitor is ours for the taking
691 BasicObjectLock* mon = &istate->monitor_base()[-1];
692 oop monobj = mon->obj();
693 assert(mon->obj() == rcvr, "method monitor mis-initialized");
694
695 bool success = UseBiasedLocking;
696 if (UseBiasedLocking) {
697 markOop mark = rcvr->mark();
698 if (mark->has_bias_pattern()) {
699 // The bias pattern is present in the object's header. Need to check
700 // whether the bias owner and the epoch are both still current.
701 intptr_t xx = ((intptr_t) THREAD) ^ (intptr_t) mark;
702 xx = (intptr_t) rcvr->klass()->prototype_header() ^ xx;
703 intptr_t yy = (xx & ~((int) markOopDesc::age_mask_in_place));
704 if (yy != 0 ) {
705 // At this point we know that the header has the bias pattern and
706 // that we are not the bias owner in the current epoch. We need to
707 // figure out more details about the state of the header in order to
708 // know what operations can be legally performed on the object's
709 // header.
710
711 // If the low three bits in the xor result aren't clear, that means
712 // the prototype header is no longer biased and we have to revoke
713 // the bias on this object.
714
715 if (yy & markOopDesc::biased_lock_mask_in_place == 0 ) {
716 // Biasing is still enabled for this data type. See whether the
717 // epoch of the current bias is still valid, meaning that the epoch
718 // bits of the mark word are equal to the epoch bits of the
719 // prototype header. (Note that the prototype header's epoch bits
720 // only change at a safepoint.) If not, attempt to rebias the object
721 // toward the current thread. Note that we must be absolutely sure
722 // that the current epoch is invalid in order to do this because
723 // otherwise the manipulations it performs on the mark word are
724 // illegal.
725 if (yy & markOopDesc::epoch_mask_in_place == 0) {
726 // The epoch of the current bias is still valid but we know nothing
727 // about the owner; it might be set or it might be clear. Try to
728 // acquire the bias of the object using an atomic operation. If this
729 // fails we will go in to the runtime to revoke the object's bias.
730 // Note that we first construct the presumed unbiased header so we
731 // don't accidentally blow away another thread's valid bias.
732 intptr_t unbiased = (intptr_t) mark & (markOopDesc::biased_lock_mask_in_place |
733 markOopDesc::age_mask_in_place |
734 markOopDesc::epoch_mask_in_place);
735 if (Atomic::cmpxchg_ptr((intptr_t)THREAD | unbiased, (intptr_t*) rcvr->mark_addr(), unbiased) != unbiased) {
736 CALL_VM(InterpreterRuntime::monitorenter(THREAD, mon), handle_exception);
737 }
738 } else {
739 try_rebias:
740 // At this point we know the epoch has expired, meaning that the
741 // current "bias owner", if any, is actually invalid. Under these
742 // circumstances _only_, we are allowed to use the current header's
743 // value as the comparison value when doing the cas to acquire the
744 // bias in the current epoch. In other words, we allow transfer of
745 // the bias from one thread to another directly in this situation.
746 xx = (intptr_t) rcvr->klass()->prototype_header() | (intptr_t) THREAD;
747 if (Atomic::cmpxchg_ptr((intptr_t)THREAD | (intptr_t) rcvr->klass()->prototype_header(),
748 (intptr_t*) rcvr->mark_addr(),
749 (intptr_t) mark) != (intptr_t) mark) {
750 CALL_VM(InterpreterRuntime::monitorenter(THREAD, mon), handle_exception);
751 }
752 }
753 } else {
754 try_revoke_bias:
755 // The prototype mark in the klass doesn't have the bias bit set any
756 // more, indicating that objects of this data type are not supposed
757 // to be biased any more. We are going to try to reset the mark of
758 // this object to the prototype value and fall through to the
759 // CAS-based locking scheme. Note that if our CAS fails, it means
760 // that another thread raced us for the privilege of revoking the
761 // bias of this particular object, so it's okay to continue in the
762 // normal locking code.
763 //
764 xx = (intptr_t) rcvr->klass()->prototype_header() | (intptr_t) THREAD;
765 if (Atomic::cmpxchg_ptr(rcvr->klass()->prototype_header(),
766 (intptr_t*) rcvr->mark_addr(),
767 mark) == mark) {
768 // (*counters->revoked_lock_entry_count_addr())++;
769 success = false;
770 }
771 }
772 }
773 } else {
774 cas_label:
775 success = false;
776 }
777 }
778 if (!success) {
779 markOop displaced = rcvr->mark()->set_unlocked();
780 mon->lock()->set_displaced_header(displaced);
781 if (Atomic::cmpxchg_ptr(mon, rcvr->mark_addr(), displaced) != displaced) {
782 // Is it simple recursive case?
783 if (THREAD->is_lock_owned((address) displaced->clear_lock_bits())) {
784 mon->lock()->set_displaced_header(NULL);
785 } else {
786 CALL_VM(InterpreterRuntime::monitorenter(THREAD, mon), handle_exception);
787 }
788 }
789 }
790 }
791 THREAD->clr_do_not_unlock();
792
793 // Notify jvmti
794 #ifdef VM_JVMTI
795 if (_jvmti_interp_events) {
796 // Whenever JVMTI puts a thread in interp_only_mode, method
797 // entry/exit events are sent for that thread to track stack depth.
798 if (THREAD->is_interp_only_mode()) {
799 CALL_VM(InterpreterRuntime::post_method_entry(THREAD),
800 handle_exception);
801 }
802 }
803 #endif /* VM_JVMTI */
804
805 goto run;
806 }
807
808 case popping_frame: {
809 // returned from a java call to pop the frame, restart the call
810 // clear the message so we don't confuse ourselves later
811 ShouldNotReachHere(); // we don't return this.
812 assert(THREAD->pop_frame_in_process(), "wrong frame pop state");
813 istate->set_msg(no_request);
814 THREAD->clr_pop_frame_in_process();
815 goto run;
816 }
817
818 case method_resume: {
819 if ((istate->_stack_base - istate->_stack_limit) != istate->method()->max_stack() + 1) {
820 // resume
821 os::breakpoint();
822 }
823 #ifdef HACK
824 {
825 ResourceMark rm;
826 char *method_name = istate->method()->name_and_sig_as_C_string();
827 if (strstr(method_name, "runThese$TestRunner.run()V") != NULL) {
828 tty->print_cr("resume: depth %d bci: %d",
829 (istate->_stack_base - istate->_stack) ,
830 istate->_bcp - istate->_method->code_base());
831 interesting = true;
832 }
833 }
834 #endif // HACK
835 // returned from a java call, continue executing.
836 if (THREAD->pop_frame_pending() && !THREAD->pop_frame_in_process()) {
837 goto handle_Pop_Frame;
838 }
839
840 if (THREAD->has_pending_exception()) goto handle_exception;
841 // Update the pc by the saved amount of the invoke bytecode size
842 UPDATE_PC(istate->bcp_advance());
843 goto run;
844 }
845
846 case deopt_resume2: {
847 // Returned from an opcode that will reexecute. Deopt was
848 // a result of a PopFrame request.
849 //
850 goto run;
851 }
852
853 case deopt_resume: {
854 // Returned from an opcode that has completed. The stack has
855 // the result all we need to do is skip across the bytecode
856 // and continue (assuming there is no exception pending)
857 //
858 // compute continuation length
859 //
860 // Note: it is possible to deopt at a return_register_finalizer opcode
861 // because this requires entering the vm to do the registering. While the
862 // opcode is complete we can't advance because there are no more opcodes
863 // much like trying to deopt at a poll return. In that has we simply
864 // get out of here
865 //
866 if ( Bytecodes::code_at(METHOD, pc) == Bytecodes::_return_register_finalizer) {
867 // this will do the right thing even if an exception is pending.
868 goto handle_return;
869 }
870 UPDATE_PC(Bytecodes::length_at(METHOD, pc));
871 if (THREAD->has_pending_exception()) goto handle_exception;
872 goto run;
873 }
874 case got_monitors: {
875 // continue locking now that we have a monitor to use
876 // we expect to find newly allocated monitor at the "top" of the monitor stack.
877 oop lockee = STACK_OBJECT(-1);
878 VERIFY_OOP(lockee);
879 // derefing's lockee ought to provoke implicit null check
880 // find a free monitor
881 BasicObjectLock* entry = (BasicObjectLock*) istate->stack_base();
882 assert(entry->obj() == NULL, "Frame manager didn't allocate the monitor");
883 entry->set_obj(lockee);
884
885 markOop displaced = lockee->mark()->set_unlocked();
886 entry->lock()->set_displaced_header(displaced);
887 if (Atomic::cmpxchg_ptr(entry, lockee->mark_addr(), displaced) != displaced) {
888 // Is it simple recursive case?
889 if (THREAD->is_lock_owned((address) displaced->clear_lock_bits())) {
890 entry->lock()->set_displaced_header(NULL);
891 } else {
892 CALL_VM(InterpreterRuntime::monitorenter(THREAD, entry), handle_exception);
893 }
894 }
895 UPDATE_PC_AND_TOS(1, -1);
896 goto run;
897 }
898 default: {
899 fatal("Unexpected message from frame manager");
900 }
901 }
902
903 run:
904
905 DO_UPDATE_INSTRUCTION_COUNT(*pc)
906 DEBUGGER_SINGLE_STEP_NOTIFY();
907 #ifdef PREFETCH_OPCCODE
908 opcode = *pc; /* prefetch first opcode */
909 #endif
910
911 #ifndef USELABELS
912 while (1)
913 #endif
914 {
915 #ifndef PREFETCH_OPCCODE
916 opcode = *pc;
917 #endif
918 // Seems like this happens twice per opcode. At worst this is only
919 // need at entry to the loop.
920 // DEBUGGER_SINGLE_STEP_NOTIFY();
921 /* Using this labels avoids double breakpoints when quickening and
922 * when returing from transition frames.
923 */
924 opcode_switch:
925 assert(istate == orig, "Corrupted istate");
926 /* QQQ Hmm this has knowledge of direction, ought to be a stack method */
927 assert(topOfStack >= istate->stack_limit(), "Stack overrun");
928 assert(topOfStack < istate->stack_base(), "Stack underrun");
929
930 #ifdef USELABELS
931 DISPATCH(opcode);
932 #else
933 switch (opcode)
934 #endif
935 {
936 CASE(_nop):
937 UPDATE_PC_AND_CONTINUE(1);
938
939 /* Push miscellaneous constants onto the stack. */
940
941 CASE(_aconst_null):
942 SET_STACK_OBJECT(NULL, 0);
943 UPDATE_PC_AND_TOS_AND_CONTINUE(1, 1);
944
945 #undef OPC_CONST_n
946 #define OPC_CONST_n(opcode, const_type, value) \
947 CASE(opcode): \
948 SET_STACK_ ## const_type(value, 0); \
949 UPDATE_PC_AND_TOS_AND_CONTINUE(1, 1);
950
951 OPC_CONST_n(_iconst_m1, INT, -1);
952 OPC_CONST_n(_iconst_0, INT, 0);
953 OPC_CONST_n(_iconst_1, INT, 1);
954 OPC_CONST_n(_iconst_2, INT, 2);
955 OPC_CONST_n(_iconst_3, INT, 3);
956 OPC_CONST_n(_iconst_4, INT, 4);
957 OPC_CONST_n(_iconst_5, INT, 5);
958 OPC_CONST_n(_fconst_0, FLOAT, 0.0);
959 OPC_CONST_n(_fconst_1, FLOAT, 1.0);
960 OPC_CONST_n(_fconst_2, FLOAT, 2.0);
961
962 #undef OPC_CONST2_n
963 #define OPC_CONST2_n(opcname, value, key, kind) \
964 CASE(_##opcname): \
965 { \
966 SET_STACK_ ## kind(VM##key##Const##value(), 1); \
967 UPDATE_PC_AND_TOS_AND_CONTINUE(1, 2); \
968 }
969 OPC_CONST2_n(dconst_0, Zero, double, DOUBLE);
970 OPC_CONST2_n(dconst_1, One, double, DOUBLE);
971 OPC_CONST2_n(lconst_0, Zero, long, LONG);
972 OPC_CONST2_n(lconst_1, One, long, LONG);
973
974 /* Load constant from constant pool: */
975
976 /* Push a 1-byte signed integer value onto the stack. */
977 CASE(_bipush):
978 SET_STACK_INT((jbyte)(pc[1]), 0);
979 UPDATE_PC_AND_TOS_AND_CONTINUE(2, 1);
980
981 /* Push a 2-byte signed integer constant onto the stack. */
982 CASE(_sipush):
983 SET_STACK_INT((int16_t)Bytes::get_Java_u2(pc + 1), 0);
984 UPDATE_PC_AND_TOS_AND_CONTINUE(3, 1);
985
986 /* load from local variable */
987
988 CASE(_aload):
989 VERIFY_OOP(LOCALS_OBJECT(pc[1]));
990 SET_STACK_OBJECT(LOCALS_OBJECT(pc[1]), 0);
991 UPDATE_PC_AND_TOS_AND_CONTINUE(2, 1);
992
993 CASE(_iload):
994 CASE(_fload):
995 SET_STACK_SLOT(LOCALS_SLOT(pc[1]), 0);
996 UPDATE_PC_AND_TOS_AND_CONTINUE(2, 1);
997
998 CASE(_lload):
999 SET_STACK_LONG_FROM_ADDR(LOCALS_LONG_AT(pc[1]), 1);
1000 UPDATE_PC_AND_TOS_AND_CONTINUE(2, 2);
1001
1002 CASE(_dload):
1003 SET_STACK_DOUBLE_FROM_ADDR(LOCALS_DOUBLE_AT(pc[1]), 1);
1004 UPDATE_PC_AND_TOS_AND_CONTINUE(2, 2);
1005
1006 #undef OPC_LOAD_n
1007 #define OPC_LOAD_n(num) \
1008 CASE(_aload_##num): \
1009 VERIFY_OOP(LOCALS_OBJECT(num)); \
1010 SET_STACK_OBJECT(LOCALS_OBJECT(num), 0); \
1011 UPDATE_PC_AND_TOS_AND_CONTINUE(1, 1); \
1012 \
1013 CASE(_iload_##num): \
1014 CASE(_fload_##num): \
1015 SET_STACK_SLOT(LOCALS_SLOT(num), 0); \
1016 UPDATE_PC_AND_TOS_AND_CONTINUE(1, 1); \
1017 \
1018 CASE(_lload_##num): \
1019 SET_STACK_LONG_FROM_ADDR(LOCALS_LONG_AT(num), 1); \
1020 UPDATE_PC_AND_TOS_AND_CONTINUE(1, 2); \
1021 CASE(_dload_##num): \
1022 SET_STACK_DOUBLE_FROM_ADDR(LOCALS_DOUBLE_AT(num), 1); \
1023 UPDATE_PC_AND_TOS_AND_CONTINUE(1, 2);
1024
1025 OPC_LOAD_n(0);
1026 OPC_LOAD_n(1);
1027 OPC_LOAD_n(2);
1028 OPC_LOAD_n(3);
1029
1030 /* store to a local variable */
1031
1032 CASE(_astore):
1033 astore(topOfStack, -1, locals, pc[1]);
1034 UPDATE_PC_AND_TOS_AND_CONTINUE(2, -1);
1035
1036 CASE(_istore):
1037 CASE(_fstore):
1038 SET_LOCALS_SLOT(STACK_SLOT(-1), pc[1]);
1039 UPDATE_PC_AND_TOS_AND_CONTINUE(2, -1);
1040
1041 CASE(_lstore):
1042 SET_LOCALS_LONG(STACK_LONG(-1), pc[1]);
1043 UPDATE_PC_AND_TOS_AND_CONTINUE(2, -2);
1044
1045 CASE(_dstore):
1046 SET_LOCALS_DOUBLE(STACK_DOUBLE(-1), pc[1]);
1047 UPDATE_PC_AND_TOS_AND_CONTINUE(2, -2);
1048
1049 CASE(_wide): {
1050 uint16_t reg = Bytes::get_Java_u2(pc + 2);
1051
1052 opcode = pc[1];
1053 switch(opcode) {
1054 case Bytecodes::_aload:
1055 VERIFY_OOP(LOCALS_OBJECT(reg));
1056 SET_STACK_OBJECT(LOCALS_OBJECT(reg), 0);
1057 UPDATE_PC_AND_TOS_AND_CONTINUE(4, 1);
1058
1059 case Bytecodes::_iload:
1060 case Bytecodes::_fload:
1061 SET_STACK_SLOT(LOCALS_SLOT(reg), 0);
1062 UPDATE_PC_AND_TOS_AND_CONTINUE(4, 1);
1063
1064 case Bytecodes::_lload:
1065 SET_STACK_LONG_FROM_ADDR(LOCALS_LONG_AT(reg), 1);
1066 UPDATE_PC_AND_TOS_AND_CONTINUE(4, 2);
1067
1068 case Bytecodes::_dload:
1069 SET_STACK_DOUBLE_FROM_ADDR(LOCALS_LONG_AT(reg), 1);
1070 UPDATE_PC_AND_TOS_AND_CONTINUE(4, 2);
1071
1072 case Bytecodes::_astore:
1073 astore(topOfStack, -1, locals, reg);
1074 UPDATE_PC_AND_TOS_AND_CONTINUE(4, -1);
1075
1076 case Bytecodes::_istore:
1077 case Bytecodes::_fstore:
1078 SET_LOCALS_SLOT(STACK_SLOT(-1), reg);
1079 UPDATE_PC_AND_TOS_AND_CONTINUE(4, -1);
1080
1081 case Bytecodes::_lstore:
1082 SET_LOCALS_LONG(STACK_LONG(-1), reg);
1083 UPDATE_PC_AND_TOS_AND_CONTINUE(4, -2);
1084
1085 case Bytecodes::_dstore:
1086 SET_LOCALS_DOUBLE(STACK_DOUBLE(-1), reg);
1087 UPDATE_PC_AND_TOS_AND_CONTINUE(4, -2);
1088
1089 case Bytecodes::_iinc: {
1090 int16_t offset = (int16_t)Bytes::get_Java_u2(pc+4);
1091 // Be nice to see what this generates.... QQQ
1092 SET_LOCALS_INT(LOCALS_INT(reg) + offset, reg);
1093 UPDATE_PC_AND_CONTINUE(6);
1094 }
1095 case Bytecodes::_ret:
1096 pc = istate->method()->code_base() + (intptr_t)(LOCALS_ADDR(reg));
1097 UPDATE_PC_AND_CONTINUE(0);
1098 default:
1099 VM_JAVA_ERROR(vmSymbols::java_lang_InternalError(), "undefined opcode");
1100 }
1101 }
1102
1103
1104 #undef OPC_STORE_n
1105 #define OPC_STORE_n(num) \
1106 CASE(_astore_##num): \
1107 astore(topOfStack, -1, locals, num); \
1108 UPDATE_PC_AND_TOS_AND_CONTINUE(1, -1); \
1109 CASE(_istore_##num): \
1110 CASE(_fstore_##num): \
1111 SET_LOCALS_SLOT(STACK_SLOT(-1), num); \
1112 UPDATE_PC_AND_TOS_AND_CONTINUE(1, -1);
1113
1114 OPC_STORE_n(0);
1115 OPC_STORE_n(1);
1116 OPC_STORE_n(2);
1117 OPC_STORE_n(3);
1118
1119 #undef OPC_DSTORE_n
1120 #define OPC_DSTORE_n(num) \
1121 CASE(_dstore_##num): \
1122 SET_LOCALS_DOUBLE(STACK_DOUBLE(-1), num); \
1123 UPDATE_PC_AND_TOS_AND_CONTINUE(1, -2); \
1124 CASE(_lstore_##num): \
1125 SET_LOCALS_LONG(STACK_LONG(-1), num); \
1126 UPDATE_PC_AND_TOS_AND_CONTINUE(1, -2);
1127
1128 OPC_DSTORE_n(0);
1129 OPC_DSTORE_n(1);
1130 OPC_DSTORE_n(2);
1131 OPC_DSTORE_n(3);
1132
1133 /* stack pop, dup, and insert opcodes */
1134
1135
1136 CASE(_pop): /* Discard the top item on the stack */
1137 UPDATE_PC_AND_TOS_AND_CONTINUE(1, -1);
1138
1139
1140 CASE(_pop2): /* Discard the top 2 items on the stack */
1141 UPDATE_PC_AND_TOS_AND_CONTINUE(1, -2);
1142
1143
1144 CASE(_dup): /* Duplicate the top item on the stack */
1145 dup(topOfStack);
1146 UPDATE_PC_AND_TOS_AND_CONTINUE(1, 1);
1147
1148 CASE(_dup2): /* Duplicate the top 2 items on the stack */
1149 dup2(topOfStack);
1150 UPDATE_PC_AND_TOS_AND_CONTINUE(1, 2);
1151
1152 CASE(_dup_x1): /* insert top word two down */
1153 dup_x1(topOfStack);
1154 UPDATE_PC_AND_TOS_AND_CONTINUE(1, 1);
1155
1156 CASE(_dup_x2): /* insert top word three down */
1157 dup_x2(topOfStack);
1158 UPDATE_PC_AND_TOS_AND_CONTINUE(1, 1);
1159
1160 CASE(_dup2_x1): /* insert top 2 slots three down */
1161 dup2_x1(topOfStack);
1162 UPDATE_PC_AND_TOS_AND_CONTINUE(1, 2);
1163
1164 CASE(_dup2_x2): /* insert top 2 slots four down */
1165 dup2_x2(topOfStack);
1166 UPDATE_PC_AND_TOS_AND_CONTINUE(1, 2);
1167
1168 CASE(_swap): { /* swap top two elements on the stack */
1169 swap(topOfStack);
1170 UPDATE_PC_AND_CONTINUE(1);
1171 }
1172
1173 /* Perform various binary integer operations */
1174
1175 #undef OPC_INT_BINARY
1176 #define OPC_INT_BINARY(opcname, opname, test) \
1177 CASE(_i##opcname): \
1178 if (test && (STACK_INT(-1) == 0)) { \
1179 VM_JAVA_ERROR(vmSymbols::java_lang_ArithmeticException(), \
1180 "/ by zero"); \
1181 } \
1182 SET_STACK_INT(VMint##opname(STACK_INT(-2), \
1183 STACK_INT(-1)), \
1184 -2); \
1185 UPDATE_PC_AND_TOS_AND_CONTINUE(1, -1); \
1186 CASE(_l##opcname): \
1187 { \
1188 if (test) { \
1189 jlong l1 = STACK_LONG(-1); \
1190 if (VMlongEqz(l1)) { \
1191 VM_JAVA_ERROR(vmSymbols::java_lang_ArithmeticException(), \
1192 "/ by long zero"); \
1193 } \
1194 } \
1195 /* First long at (-1,-2) next long at (-3,-4) */ \
1196 SET_STACK_LONG(VMlong##opname(STACK_LONG(-3), \
1197 STACK_LONG(-1)), \
1198 -3); \
1199 UPDATE_PC_AND_TOS_AND_CONTINUE(1, -2); \
1200 }
1201
1202 OPC_INT_BINARY(add, Add, 0);
1203 OPC_INT_BINARY(sub, Sub, 0);
1204 OPC_INT_BINARY(mul, Mul, 0);
1205 OPC_INT_BINARY(and, And, 0);
1206 OPC_INT_BINARY(or, Or, 0);
1207 OPC_INT_BINARY(xor, Xor, 0);
1208 OPC_INT_BINARY(div, Div, 1);
1209 OPC_INT_BINARY(rem, Rem, 1);
1210
1211
1212 /* Perform various binary floating number operations */
1213 /* On some machine/platforms/compilers div zero check can be implicit */
1214
1215 #undef OPC_FLOAT_BINARY
1216 #define OPC_FLOAT_BINARY(opcname, opname) \
1217 CASE(_d##opcname): { \
1218 SET_STACK_DOUBLE(VMdouble##opname(STACK_DOUBLE(-3), \
1219 STACK_DOUBLE(-1)), \
1220 -3); \
1221 UPDATE_PC_AND_TOS_AND_CONTINUE(1, -2); \
1222 } \
1223 CASE(_f##opcname): \
1224 SET_STACK_FLOAT(VMfloat##opname(STACK_FLOAT(-2), \
1225 STACK_FLOAT(-1)), \
1226 -2); \
1227 UPDATE_PC_AND_TOS_AND_CONTINUE(1, -1);
1228
1229
1230 OPC_FLOAT_BINARY(add, Add);
1231 OPC_FLOAT_BINARY(sub, Sub);
1232 OPC_FLOAT_BINARY(mul, Mul);
1233 OPC_FLOAT_BINARY(div, Div);
1234 OPC_FLOAT_BINARY(rem, Rem);
1235
1236 /* Shift operations
1237 * Shift left int and long: ishl, lshl
1238 * Logical shift right int and long w/zero extension: iushr, lushr
1239 * Arithmetic shift right int and long w/sign extension: ishr, lshr
1240 */
1241
1242 #undef OPC_SHIFT_BINARY
1243 #define OPC_SHIFT_BINARY(opcname, opname) \
1244 CASE(_i##opcname): \
1245 SET_STACK_INT(VMint##opname(STACK_INT(-2), \
1246 STACK_INT(-1)), \
1247 -2); \
1248 UPDATE_PC_AND_TOS_AND_CONTINUE(1, -1); \
1249 CASE(_l##opcname): \
1250 { \
1251 SET_STACK_LONG(VMlong##opname(STACK_LONG(-2), \
1252 STACK_INT(-1)), \
1253 -2); \
1254 UPDATE_PC_AND_TOS_AND_CONTINUE(1, -1); \
1255 }
1256
1257 OPC_SHIFT_BINARY(shl, Shl);
1258 OPC_SHIFT_BINARY(shr, Shr);
1259 OPC_SHIFT_BINARY(ushr, Ushr);
1260
1261 /* Increment local variable by constant */
1262 CASE(_iinc):
1263 {
1264 // locals[pc[1]].j.i += (jbyte)(pc[2]);
1265 SET_LOCALS_INT(LOCALS_INT(pc[1]) + (jbyte)(pc[2]), pc[1]);
1266 UPDATE_PC_AND_CONTINUE(3);
1267 }
1268
1269 /* negate the value on the top of the stack */
1270
1271 CASE(_ineg):
1272 SET_STACK_INT(VMintNeg(STACK_INT(-1)), -1);
1273 UPDATE_PC_AND_CONTINUE(1);
1274
1275 CASE(_fneg):
1276 SET_STACK_FLOAT(VMfloatNeg(STACK_FLOAT(-1)), -1);
1277 UPDATE_PC_AND_CONTINUE(1);
1278
1279 CASE(_lneg):
1280 {
1281 SET_STACK_LONG(VMlongNeg(STACK_LONG(-1)), -1);
1282 UPDATE_PC_AND_CONTINUE(1);
1283 }
1284
1285 CASE(_dneg):
1286 {
1287 SET_STACK_DOUBLE(VMdoubleNeg(STACK_DOUBLE(-1)), -1);
1288 UPDATE_PC_AND_CONTINUE(1);
1289 }
1290
1291 /* Conversion operations */
1292
1293 CASE(_i2f): /* convert top of stack int to float */
1294 SET_STACK_FLOAT(VMint2Float(STACK_INT(-1)), -1);
1295 UPDATE_PC_AND_CONTINUE(1);
1296
1297 CASE(_i2l): /* convert top of stack int to long */
1298 {
1299 // this is ugly QQQ
1300 jlong r = VMint2Long(STACK_INT(-1));
1301 MORE_STACK(-1); // Pop
1302 SET_STACK_LONG(r, 1);
1303
1304 UPDATE_PC_AND_TOS_AND_CONTINUE(1, 2);
1305 }
1306
1307 CASE(_i2d): /* convert top of stack int to double */
1308 {
1309 // this is ugly QQQ (why cast to jlong?? )
1310 jdouble r = (jlong)STACK_INT(-1);
1311 MORE_STACK(-1); // Pop
1312 SET_STACK_DOUBLE(r, 1);
1313
1314 UPDATE_PC_AND_TOS_AND_CONTINUE(1, 2);
1315 }
1316
1317 CASE(_l2i): /* convert top of stack long to int */
1318 {
1319 jint r = VMlong2Int(STACK_LONG(-1));
1320 MORE_STACK(-2); // Pop
1321 SET_STACK_INT(r, 0);
1322 UPDATE_PC_AND_TOS_AND_CONTINUE(1, 1);
1323 }
1324
1325 CASE(_l2f): /* convert top of stack long to float */
1326 {
1327 jlong r = STACK_LONG(-1);
1328 MORE_STACK(-2); // Pop
1329 SET_STACK_FLOAT(VMlong2Float(r), 0);
1330 UPDATE_PC_AND_TOS_AND_CONTINUE(1, 1);
1331 }
1332
1333 CASE(_l2d): /* convert top of stack long to double */
1334 {
1335 jlong r = STACK_LONG(-1);
1336 MORE_STACK(-2); // Pop
1337 SET_STACK_DOUBLE(VMlong2Double(r), 1);
1338 UPDATE_PC_AND_TOS_AND_CONTINUE(1, 2);
1339 }
1340
1341 CASE(_f2i): /* Convert top of stack float to int */
1342 SET_STACK_INT(SharedRuntime::f2i(STACK_FLOAT(-1)), -1);
1343 UPDATE_PC_AND_CONTINUE(1);
1344
1345 CASE(_f2l): /* convert top of stack float to long */
1346 {
1347 jlong r = SharedRuntime::f2l(STACK_FLOAT(-1));
1348 MORE_STACK(-1); // POP
1349 SET_STACK_LONG(r, 1);
1350 UPDATE_PC_AND_TOS_AND_CONTINUE(1, 2);
1351 }
1352
1353 CASE(_f2d): /* convert top of stack float to double */
1354 {
1355 jfloat f;
1356 jdouble r;
1357 f = STACK_FLOAT(-1);
1358 r = (jdouble) f;
1359 MORE_STACK(-1); // POP
1360 SET_STACK_DOUBLE(r, 1);
1361 UPDATE_PC_AND_TOS_AND_CONTINUE(1, 2);
1362 }
1363
1364 CASE(_d2i): /* convert top of stack double to int */
1365 {
1366 jint r1 = SharedRuntime::d2i(STACK_DOUBLE(-1));
1367 MORE_STACK(-2);
1368 SET_STACK_INT(r1, 0);
1369 UPDATE_PC_AND_TOS_AND_CONTINUE(1, 1);
1370 }
1371
1372 CASE(_d2f): /* convert top of stack double to float */
1373 {
1374 jfloat r1 = VMdouble2Float(STACK_DOUBLE(-1));
1375 MORE_STACK(-2);
1376 SET_STACK_FLOAT(r1, 0);
1377 UPDATE_PC_AND_TOS_AND_CONTINUE(1, 1);
1378 }
1379
1380 CASE(_d2l): /* convert top of stack double to long */
1381 {
1382 jlong r1 = SharedRuntime::d2l(STACK_DOUBLE(-1));
1383 MORE_STACK(-2);
1384 SET_STACK_LONG(r1, 1);
1385 UPDATE_PC_AND_TOS_AND_CONTINUE(1, 2);
1386 }
1387
1388 CASE(_i2b):
1389 SET_STACK_INT(VMint2Byte(STACK_INT(-1)), -1);
1390 UPDATE_PC_AND_CONTINUE(1);
1391
1392 CASE(_i2c):
1393 SET_STACK_INT(VMint2Char(STACK_INT(-1)), -1);
1394 UPDATE_PC_AND_CONTINUE(1);
1395
1396 CASE(_i2s):
1397 SET_STACK_INT(VMint2Short(STACK_INT(-1)), -1);
1398 UPDATE_PC_AND_CONTINUE(1);
1399
1400 /* comparison operators */
1401
1402
1403 #define COMPARISON_OP(name, comparison) \
1404 CASE(_if_icmp##name): { \
1405 int skip = (STACK_INT(-2) comparison STACK_INT(-1)) \
1406 ? (int16_t)Bytes::get_Java_u2(pc + 1) : 3; \
1407 address branch_pc = pc; \
1408 UPDATE_PC_AND_TOS(skip, -2); \
1409 DO_BACKEDGE_CHECKS(skip, branch_pc); \
1410 CONTINUE; \
1411 } \
1412 CASE(_if##name): { \
1413 int skip = (STACK_INT(-1) comparison 0) \
1414 ? (int16_t)Bytes::get_Java_u2(pc + 1) : 3; \
1415 address branch_pc = pc; \
1416 UPDATE_PC_AND_TOS(skip, -1); \
1417 DO_BACKEDGE_CHECKS(skip, branch_pc); \
1418 CONTINUE; \
1419 }
1420
1421 #define COMPARISON_OP2(name, comparison) \
1422 COMPARISON_OP(name, comparison) \
1423 CASE(_if_acmp##name): { \
1424 int skip = (STACK_OBJECT(-2) comparison STACK_OBJECT(-1)) \
1425 ? (int16_t)Bytes::get_Java_u2(pc + 1) : 3; \
1426 address branch_pc = pc; \
1427 UPDATE_PC_AND_TOS(skip, -2); \
1428 DO_BACKEDGE_CHECKS(skip, branch_pc); \
1429 CONTINUE; \
1430 }
1431
1432 #define NULL_COMPARISON_NOT_OP(name) \
1433 CASE(_if##name): { \
1434 int skip = (!(STACK_OBJECT(-1) == NULL)) \
1435 ? (int16_t)Bytes::get_Java_u2(pc + 1) : 3; \
1436 address branch_pc = pc; \
1437 UPDATE_PC_AND_TOS(skip, -1); \
1438 DO_BACKEDGE_CHECKS(skip, branch_pc); \
1439 CONTINUE; \
1440 }
1441
1442 #define NULL_COMPARISON_OP(name) \
1443 CASE(_if##name): { \
1444 int skip = ((STACK_OBJECT(-1) == NULL)) \
1445 ? (int16_t)Bytes::get_Java_u2(pc + 1) : 3; \
1446 address branch_pc = pc; \
1447 UPDATE_PC_AND_TOS(skip, -1); \
1448 DO_BACKEDGE_CHECKS(skip, branch_pc); \
1449 CONTINUE; \
1450 }
1451 COMPARISON_OP(lt, <);
1452 COMPARISON_OP(gt, >);
1453 COMPARISON_OP(le, <=);
1454 COMPARISON_OP(ge, >=);
1455 COMPARISON_OP2(eq, ==); /* include ref comparison */
1456 COMPARISON_OP2(ne, !=); /* include ref comparison */
1457 NULL_COMPARISON_OP(null);
1458 NULL_COMPARISON_NOT_OP(nonnull);
1459
1460 /* Goto pc at specified offset in switch table. */
1461
1462 CASE(_tableswitch): {
1463 jint* lpc = (jint*)VMalignWordUp(pc+1);
1464 int32_t key = STACK_INT(-1);
1465 int32_t low = Bytes::get_Java_u4((address)&lpc[1]);
1466 int32_t high = Bytes::get_Java_u4((address)&lpc[2]);
1467 int32_t skip;
1468 key -= low;
1469 skip = ((uint32_t) key > (uint32_t)(high - low))
1470 ? Bytes::get_Java_u4((address)&lpc[0])
1471 : Bytes::get_Java_u4((address)&lpc[key + 3]);
1472 // Does this really need a full backedge check (osr?)
1473 address branch_pc = pc;
1474 UPDATE_PC_AND_TOS(skip, -1);
1475 DO_BACKEDGE_CHECKS(skip, branch_pc);
1476 CONTINUE;
1477 }
1478
1479 /* Goto pc whose table entry matches specified key */
1480
1481 CASE(_lookupswitch): {
1482 jint* lpc = (jint*)VMalignWordUp(pc+1);
1483 int32_t key = STACK_INT(-1);
1484 int32_t skip = Bytes::get_Java_u4((address) lpc); /* default amount */
1485 int32_t npairs = Bytes::get_Java_u4((address) &lpc[1]);
1486 while (--npairs >= 0) {
1487 lpc += 2;
1488 if (key == (int32_t)Bytes::get_Java_u4((address)lpc)) {
1489 skip = Bytes::get_Java_u4((address)&lpc[1]);
1490 break;
1491 }
1492 }
1493 address branch_pc = pc;
1494 UPDATE_PC_AND_TOS(skip, -1);
1495 DO_BACKEDGE_CHECKS(skip, branch_pc);
1496 CONTINUE;
1497 }
1498
1499 CASE(_fcmpl):
1500 CASE(_fcmpg):
1501 {
1502 SET_STACK_INT(VMfloatCompare(STACK_FLOAT(-2),
1503 STACK_FLOAT(-1),
1504 (opcode == Bytecodes::_fcmpl ? -1 : 1)),
1505 -2);
1506 UPDATE_PC_AND_TOS_AND_CONTINUE(1, -1);
1507 }
1508
1509 CASE(_dcmpl):
1510 CASE(_dcmpg):
1511 {
1512 int r = VMdoubleCompare(STACK_DOUBLE(-3),
1513 STACK_DOUBLE(-1),
1514 (opcode == Bytecodes::_dcmpl ? -1 : 1));
1515 MORE_STACK(-4); // Pop
1516 SET_STACK_INT(r, 0);
1517 UPDATE_PC_AND_TOS_AND_CONTINUE(1, 1);
1518 }
1519
1520 CASE(_lcmp):
1521 {
1522 int r = VMlongCompare(STACK_LONG(-3), STACK_LONG(-1));
1523 MORE_STACK(-4);
1524 SET_STACK_INT(r, 0);
1525 UPDATE_PC_AND_TOS_AND_CONTINUE(1, 1);
1526 }
1527
1528
1529 /* Return from a method */
1530
1531 CASE(_areturn):
1532 CASE(_ireturn):
1533 CASE(_freturn):
1534 {
1535 // Allow a safepoint before returning to frame manager.
1536 SAFEPOINT;
1537
1538 goto handle_return;
1539 }
1540
1541 CASE(_lreturn):
1542 CASE(_dreturn):
1543 {
1544 // Allow a safepoint before returning to frame manager.
1545 SAFEPOINT;
1546 goto handle_return;
1547 }
1548
1549 CASE(_return_register_finalizer): {
1550
1551 oop rcvr = LOCALS_OBJECT(0);
1552 VERIFY_OOP(rcvr);
1553 if (rcvr->klass()->has_finalizer()) {
1554 CALL_VM(InterpreterRuntime::register_finalizer(THREAD, rcvr), handle_exception);
1555 }
1556 goto handle_return;
1557 }
1558 CASE(_return): {
1559
1560 // Allow a safepoint before returning to frame manager.
1561 SAFEPOINT;
1562 goto handle_return;
1563 }
1564
1565 /* Array access byte-codes */
1566
1567 /* Every array access byte-code starts out like this */
1568 // arrayOopDesc* arrObj = (arrayOopDesc*)STACK_OBJECT(arrayOff);
1569 #define ARRAY_INTRO(arrayOff) \
1570 arrayOop arrObj = (arrayOop)STACK_OBJECT(arrayOff); \
1571 jint index = STACK_INT(arrayOff + 1); \
1572 char message[jintAsStringSize]; \
1573 CHECK_NULL(arrObj); \
1574 if ((uint32_t)index >= (uint32_t)arrObj->length()) { \
1575 sprintf(message, "%d", index); \
1576 VM_JAVA_ERROR(vmSymbols::java_lang_ArrayIndexOutOfBoundsException(), \
1577 message); \
1578 }
1579
1580 /* 32-bit loads. These handle conversion from < 32-bit types */
1581 #define ARRAY_LOADTO32(T, T2, format, stackRes, extra) \
1582 { \
1583 ARRAY_INTRO(-2); \
1584 extra; \
1585 SET_ ## stackRes(*(T2 *)(((address) arrObj->base(T)) + index * sizeof(T2)), \
1586 -2); \
1587 UPDATE_PC_AND_TOS_AND_CONTINUE(1, -1); \
1588 }
1589
1590 /* 64-bit loads */
1591 #define ARRAY_LOADTO64(T,T2, stackRes, extra) \
1592 { \
1593 ARRAY_INTRO(-2); \
1594 SET_ ## stackRes(*(T2 *)(((address) arrObj->base(T)) + index * sizeof(T2)), -1); \
1595 extra; \
1596 UPDATE_PC_AND_CONTINUE(1); \
1597 }
1598
1599 CASE(_iaload):
1600 ARRAY_LOADTO32(T_INT, jint, "%d", STACK_INT, 0);
1601 CASE(_faload):
1602 ARRAY_LOADTO32(T_FLOAT, jfloat, "%f", STACK_FLOAT, 0);
1603 CASE(_aaload):
1604 ARRAY_LOADTO32(T_OBJECT, oop, INTPTR_FORMAT, STACK_OBJECT, 0);
1605 CASE(_baload):
1606 ARRAY_LOADTO32(T_BYTE, jbyte, "%d", STACK_INT, 0);
1607 CASE(_caload):
1608 ARRAY_LOADTO32(T_CHAR, jchar, "%d", STACK_INT, 0);
1609 CASE(_saload):
1610 ARRAY_LOADTO32(T_SHORT, jshort, "%d", STACK_INT, 0);
1611 CASE(_laload):
1612 ARRAY_LOADTO64(T_LONG, jlong, STACK_LONG, 0);
1613 CASE(_daload):
1614 ARRAY_LOADTO64(T_DOUBLE, jdouble, STACK_DOUBLE, 0);
1615
1616 /* 32-bit stores. These handle conversion to < 32-bit types */
1617 #define ARRAY_STOREFROM32(T, T2, format, stackSrc, extra) \
1618 { \
1619 ARRAY_INTRO(-3); \
1620 extra; \
1621 *(T2 *)(((address) arrObj->base(T)) + index * sizeof(T2)) = stackSrc( -1); \
1622 UPDATE_PC_AND_TOS_AND_CONTINUE(1, -3); \
1623 }
1624
1625 /* 64-bit stores */
1626 #define ARRAY_STOREFROM64(T, T2, stackSrc, extra) \
1627 { \
1628 ARRAY_INTRO(-4); \
1629 extra; \
1630 *(T2 *)(((address) arrObj->base(T)) + index * sizeof(T2)) = stackSrc( -1); \
1631 UPDATE_PC_AND_TOS_AND_CONTINUE(1, -4); \
1632 }
1633
1634 CASE(_iastore):
1635 ARRAY_STOREFROM32(T_INT, jint, "%d", STACK_INT, 0);
1636 CASE(_fastore):
1637 ARRAY_STOREFROM32(T_FLOAT, jfloat, "%f", STACK_FLOAT, 0);
1638 /*
1639 * This one looks different because of the assignability check
1640 */
1641 CASE(_aastore): {
1642 oop rhsObject = STACK_OBJECT(-1);
1643 VERIFY_OOP(rhsObject);
1644 ARRAY_INTRO( -3);
1645 // arrObj, index are set
1646 if (rhsObject != NULL) {
1647 /* Check assignability of rhsObject into arrObj */
1648 Klass* rhsKlassOop = rhsObject->klass(); // EBX (subclass)
1649 Klass* elemKlassOop = ObjArrayKlass::cast(arrObj->klass())->element_klass(); // superklass EAX
1650 //
1651 // Check for compatibilty. This check must not GC!!
1652 // Seems way more expensive now that we must dispatch
1653 //
1654 if (rhsKlassOop != elemKlassOop && !rhsKlassOop->is_subtype_of(elemKlassOop)) { // ebx->is...
1655 VM_JAVA_ERROR(vmSymbols::java_lang_ArrayStoreException(), "");
1656 }
1657 }
1658 oop* elem_loc = (oop*)(((address) arrObj->base(T_OBJECT)) + index * sizeof(oop));
1659 // *(oop*)(((address) arrObj->base(T_OBJECT)) + index * sizeof(oop)) = rhsObject;
1660 *elem_loc = rhsObject;
1661 // Mark the card
1662 OrderAccess::release_store(&BYTE_MAP_BASE[(uintptr_t)elem_loc >> CardTableModRefBS::card_shift], 0);
1663 UPDATE_PC_AND_TOS_AND_CONTINUE(1, -3);
1664 }
1665 CASE(_bastore):
1666 ARRAY_STOREFROM32(T_BYTE, jbyte, "%d", STACK_INT, 0);
1667 CASE(_castore):
1668 ARRAY_STOREFROM32(T_CHAR, jchar, "%d", STACK_INT, 0);
1669 CASE(_sastore):
1670 ARRAY_STOREFROM32(T_SHORT, jshort, "%d", STACK_INT, 0);
1671 CASE(_lastore):
1672 ARRAY_STOREFROM64(T_LONG, jlong, STACK_LONG, 0);
1673 CASE(_dastore):
1674 ARRAY_STOREFROM64(T_DOUBLE, jdouble, STACK_DOUBLE, 0);
1675
1676 CASE(_arraylength):
1677 {
1678 arrayOop ary = (arrayOop) STACK_OBJECT(-1);
1679 CHECK_NULL(ary);
1680 SET_STACK_INT(ary->length(), -1);
1681 UPDATE_PC_AND_CONTINUE(1);
1682 }
1683
1684 /* monitorenter and monitorexit for locking/unlocking an object */
1685
1686 CASE(_monitorenter): {
1687 oop lockee = STACK_OBJECT(-1);
1688 // derefing's lockee ought to provoke implicit null check
1689 CHECK_NULL(lockee);
1690 // find a free monitor or one already allocated for this object
1691 // if we find a matching object then we need a new monitor
1692 // since this is recursive enter
1693 BasicObjectLock* limit = istate->monitor_base();
1694 BasicObjectLock* most_recent = (BasicObjectLock*) istate->stack_base();
1695 BasicObjectLock* entry = NULL;
1696 while (most_recent != limit ) {
1697 if (most_recent->obj() == NULL) entry = most_recent;
1698 else if (most_recent->obj() == lockee) break;
1699 most_recent++;
1700 }
1701 if (entry != NULL) {
1702 entry->set_obj(lockee);
1703 markOop displaced = lockee->mark()->set_unlocked();
1704 entry->lock()->set_displaced_header(displaced);
1705 if (Atomic::cmpxchg_ptr(entry, lockee->mark_addr(), displaced) != displaced) {
1706 // Is it simple recursive case?
1707 if (THREAD->is_lock_owned((address) displaced->clear_lock_bits())) {
1708 entry->lock()->set_displaced_header(NULL);
1709 } else {
1710 CALL_VM(InterpreterRuntime::monitorenter(THREAD, entry), handle_exception);
1711 }
1712 }
1713 UPDATE_PC_AND_TOS_AND_CONTINUE(1, -1);
1714 } else {
1715 istate->set_msg(more_monitors);
1716 UPDATE_PC_AND_RETURN(0); // Re-execute
1717 }
1718 }
1719
1720 CASE(_monitorexit): {
1721 oop lockee = STACK_OBJECT(-1);
1722 CHECK_NULL(lockee);
1723 // derefing's lockee ought to provoke implicit null check
1724 // find our monitor slot
1725 BasicObjectLock* limit = istate->monitor_base();
1726 BasicObjectLock* most_recent = (BasicObjectLock*) istate->stack_base();
1727 while (most_recent != limit ) {
1728 if ((most_recent)->obj() == lockee) {
1729 BasicLock* lock = most_recent->lock();
1730 markOop header = lock->displaced_header();
1731 most_recent->set_obj(NULL);
1732 // If it isn't recursive we either must swap old header or call the runtime
1733 if (header != NULL) {
1734 if (Atomic::cmpxchg_ptr(header, lockee->mark_addr(), lock) != lock) {
1735 // restore object for the slow case
1736 most_recent->set_obj(lockee);
1737 CALL_VM(InterpreterRuntime::monitorexit(THREAD, most_recent), handle_exception);
1738 }
1739 }
1740 UPDATE_PC_AND_TOS_AND_CONTINUE(1, -1);
1741 }
1742 most_recent++;
1743 }
1744 // Need to throw illegal monitor state exception
1745 CALL_VM(InterpreterRuntime::throw_illegal_monitor_state_exception(THREAD), handle_exception);
1746 ShouldNotReachHere();
1747 }
1748
1749 /* All of the non-quick opcodes. */
1750
1751 /* -Set clobbersCpIndex true if the quickened opcode clobbers the
1752 * constant pool index in the instruction.
1753 */
1754 CASE(_getfield):
1755 CASE(_getstatic):
1756 {
1757 u2 index;
1758 ConstantPoolCacheEntry* cache;
1759 index = Bytes::get_native_u2(pc+1);
1760
1761 // QQQ Need to make this as inlined as possible. Probably need to
1762 // split all the bytecode cases out so c++ compiler has a chance
1763 // for constant prop to fold everything possible away.
1764
1765 cache = cp->entry_at(index);
1766 if (!cache->is_resolved((Bytecodes::Code)opcode)) {
1767 CALL_VM(InterpreterRuntime::resolve_get_put(THREAD, (Bytecodes::Code)opcode),
1768 handle_exception);
1769 cache = cp->entry_at(index);
1770 }
1771
1772 #ifdef VM_JVMTI
1773 if (_jvmti_interp_events) {
1774 int *count_addr;
1775 oop obj;
1776 // Check to see if a field modification watch has been set
1777 // before we take the time to call into the VM.
1778 count_addr = (int *)JvmtiExport::get_field_access_count_addr();
1779 if ( *count_addr > 0 ) {
1780 if ((Bytecodes::Code)opcode == Bytecodes::_getstatic) {
1781 obj = (oop)NULL;
1782 } else {
1783 obj = (oop) STACK_OBJECT(-1);
1784 VERIFY_OOP(obj);
1785 }
1786 CALL_VM(InterpreterRuntime::post_field_access(THREAD,
1787 obj,
1788 cache),
1789 handle_exception);
1790 }
1791 }
1792 #endif /* VM_JVMTI */
1793
1794 oop obj;
1795 if ((Bytecodes::Code)opcode == Bytecodes::_getstatic) {
1796 Klass* k = cache->f1_as_klass();
1797 obj = k->java_mirror();
1798 MORE_STACK(1); // Assume single slot push
1799 } else {
1800 obj = (oop) STACK_OBJECT(-1);
1801 CHECK_NULL(obj);
1802 }
1803
1804 //
1805 // Now store the result on the stack
1806 //
1807 TosState tos_type = cache->flag_state();
1808 int field_offset = cache->f2_as_index();
1809 if (cache->is_volatile()) {
1810 if (tos_type == atos) {
1811 VERIFY_OOP(obj->obj_field_acquire(field_offset));
1812 SET_STACK_OBJECT(obj->obj_field_acquire(field_offset), -1);
1813 } else if (tos_type == itos) {
1814 SET_STACK_INT(obj->int_field_acquire(field_offset), -1);
1815 } else if (tos_type == ltos) {
1816 SET_STACK_LONG(obj->long_field_acquire(field_offset), 0);
1817 MORE_STACK(1);
1818 } else if (tos_type == btos) {
1819 SET_STACK_INT(obj->byte_field_acquire(field_offset), -1);
1820 } else if (tos_type == ctos) {
1821 SET_STACK_INT(obj->char_field_acquire(field_offset), -1);
1822 } else if (tos_type == stos) {
1823 SET_STACK_INT(obj->short_field_acquire(field_offset), -1);
1824 } else if (tos_type == ftos) {
1825 SET_STACK_FLOAT(obj->float_field_acquire(field_offset), -1);
1826 } else {
1827 SET_STACK_DOUBLE(obj->double_field_acquire(field_offset), 0);
1828 MORE_STACK(1);
1829 }
1830 } else {
1831 if (tos_type == atos) {
1832 VERIFY_OOP(obj->obj_field(field_offset));
1833 SET_STACK_OBJECT(obj->obj_field(field_offset), -1);
1834 } else if (tos_type == itos) {
1835 SET_STACK_INT(obj->int_field(field_offset), -1);
1836 } else if (tos_type == ltos) {
1837 SET_STACK_LONG(obj->long_field(field_offset), 0);
1838 MORE_STACK(1);
1839 } else if (tos_type == btos) {
1840 SET_STACK_INT(obj->byte_field(field_offset), -1);
1841 } else if (tos_type == ctos) {
1842 SET_STACK_INT(obj->char_field(field_offset), -1);
1843 } else if (tos_type == stos) {
1844 SET_STACK_INT(obj->short_field(field_offset), -1);
1845 } else if (tos_type == ftos) {
1846 SET_STACK_FLOAT(obj->float_field(field_offset), -1);
1847 } else {
1848 SET_STACK_DOUBLE(obj->double_field(field_offset), 0);
1849 MORE_STACK(1);
1850 }
1851 }
1852
1853 UPDATE_PC_AND_CONTINUE(3);
1854 }
1855
1856 CASE(_putfield):
1857 CASE(_putstatic):
1858 {
1859 u2 index = Bytes::get_native_u2(pc+1);
1860 ConstantPoolCacheEntry* cache = cp->entry_at(index);
1861 if (!cache->is_resolved((Bytecodes::Code)opcode)) {
1862 CALL_VM(InterpreterRuntime::resolve_get_put(THREAD, (Bytecodes::Code)opcode),
1863 handle_exception);
1864 cache = cp->entry_at(index);
1865 }
1866
1867 #ifdef VM_JVMTI
1868 if (_jvmti_interp_events) {
1869 int *count_addr;
1870 oop obj;
1871 // Check to see if a field modification watch has been set
1872 // before we take the time to call into the VM.
1873 count_addr = (int *)JvmtiExport::get_field_modification_count_addr();
1874 if ( *count_addr > 0 ) {
1875 if ((Bytecodes::Code)opcode == Bytecodes::_putstatic) {
1876 obj = (oop)NULL;
1877 }
1878 else {
1879 if (cache->is_long() || cache->is_double()) {
1880 obj = (oop) STACK_OBJECT(-3);
1881 } else {
1882 obj = (oop) STACK_OBJECT(-2);
1883 }
1884 VERIFY_OOP(obj);
1885 }
1886
1887 CALL_VM(InterpreterRuntime::post_field_modification(THREAD,
1888 obj,
1889 cache,
1890 (jvalue *)STACK_SLOT(-1)),
1891 handle_exception);
1892 }
1893 }
1894 #endif /* VM_JVMTI */
1895
1896 // QQQ Need to make this as inlined as possible. Probably need to split all the bytecode cases
1897 // out so c++ compiler has a chance for constant prop to fold everything possible away.
1898
1899 oop obj;
1900 int count;
1901 TosState tos_type = cache->flag_state();
1902
1903 count = -1;
1904 if (tos_type == ltos || tos_type == dtos) {
1905 --count;
1906 }
1907 if ((Bytecodes::Code)opcode == Bytecodes::_putstatic) {
1908 Klass* k = cache->f1_as_klass();
1909 obj = k->java_mirror();
1910 } else {
1911 --count;
1912 obj = (oop) STACK_OBJECT(count);
1913 CHECK_NULL(obj);
1914 }
1915
1916 //
1917 // Now store the result
1918 //
1919 int field_offset = cache->f2_as_index();
1920 if (cache->is_volatile()) {
1921 if (tos_type == itos) {
1922 obj->release_int_field_put(field_offset, STACK_INT(-1));
1923 } else if (tos_type == atos) {
1924 VERIFY_OOP(STACK_OBJECT(-1));
1925 obj->release_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->release_byte_field_put(field_offset, STACK_INT(-1));
1929 } else if (tos_type == ltos) {
1930 obj->release_long_field_put(field_offset, STACK_LONG(-1));
1931 } else if (tos_type == ctos) {
1932 obj->release_char_field_put(field_offset, STACK_INT(-1));
1933 } else if (tos_type == stos) {
1934 obj->release_short_field_put(field_offset, STACK_INT(-1));
1935 } else if (tos_type == ftos) {
1936 obj->release_float_field_put(field_offset, STACK_FLOAT(-1));
1937 } else {
1938 obj->release_double_field_put(field_offset, STACK_DOUBLE(-1));
1939 }
1940 OrderAccess::storeload();
1941 } else {
1942 if (tos_type == itos) {
1943 obj->int_field_put(field_offset, STACK_INT(-1));
1944 } else if (tos_type == atos) {
1945 VERIFY_OOP(STACK_OBJECT(-1));
1946 obj->obj_field_put(field_offset, STACK_OBJECT(-1));
1947 OrderAccess::release_store(&BYTE_MAP_BASE[(uintptr_t)obj >> CardTableModRefBS::card_shift], 0);
1948 } else if (tos_type == btos) {
1949 obj->byte_field_put(field_offset, STACK_INT(-1));
1950 } else if (tos_type == ltos) {
1951 obj->long_field_put(field_offset, STACK_LONG(-1));
1952 } else if (tos_type == ctos) {
1953 obj->char_field_put(field_offset, STACK_INT(-1));
1954 } else if (tos_type == stos) {
1955 obj->short_field_put(field_offset, STACK_INT(-1));
1956 } else if (tos_type == ftos) {
1957 obj->float_field_put(field_offset, STACK_FLOAT(-1));
1958 } else {
1959 obj->double_field_put(field_offset, STACK_DOUBLE(-1));
1960 }
1961 }
1962
1963 UPDATE_PC_AND_TOS_AND_CONTINUE(3, count);
1964 }
1965
1966 CASE(_new): {
1967 u2 index = Bytes::get_Java_u2(pc+1);
1968 ConstantPool* constants = istate->method()->constants();
1969 if (!constants->tag_at(index).is_unresolved_klass()) {
1970 // Make sure klass is initialized and doesn't have a finalizer
1971 Klass* entry = constants->slot_at(index).get_klass();
1972 assert(entry->is_klass(), "Should be resolved klass");
1973 Klass* k_entry = (Klass*) entry;
1974 assert(k_entry->oop_is_instance(), "Should be InstanceKlass");
1975 InstanceKlass* ik = (InstanceKlass*) k_entry;
1976 if ( ik->is_initialized() && ik->can_be_fastpath_allocated() ) {
1977 size_t obj_size = ik->size_helper();
1978 oop result = NULL;
1979 // If the TLAB isn't pre-zeroed then we'll have to do it
1980 bool need_zero = !ZeroTLAB;
1981 if (UseTLAB) {
1982 result = (oop) THREAD->tlab().allocate(obj_size);
1983 }
1984 if (result == NULL) {
1985 need_zero = true;
1986 // Try allocate in shared eden
1987 retry:
1988 HeapWord* compare_to = *Universe::heap()->top_addr();
1989 HeapWord* new_top = compare_to + obj_size;
1990 if (new_top <= *Universe::heap()->end_addr()) {
1991 if (Atomic::cmpxchg_ptr(new_top, Universe::heap()->top_addr(), compare_to) != compare_to) {
1992 goto retry;
1993 }
1994 result = (oop) compare_to;
1995 }
1996 }
1997 if (result != NULL) {
1998 // Initialize object (if nonzero size and need) and then the header
1999 if (need_zero ) {
2000 HeapWord* to_zero = (HeapWord*) result + sizeof(oopDesc) / oopSize;
2001 obj_size -= sizeof(oopDesc) / oopSize;
2002 if (obj_size > 0 ) {
2003 memset(to_zero, 0, obj_size * HeapWordSize);
2004 }
2005 }
2006 if (UseBiasedLocking) {
2007 result->set_mark(ik->prototype_header());
2008 } else {
2009 result->set_mark(markOopDesc::prototype());
2010 }
2011 result->set_klass_gap(0);
2012 result->set_klass(k_entry);
2013 SET_STACK_OBJECT(result, 0);
2014 UPDATE_PC_AND_TOS_AND_CONTINUE(3, 1);
2015 }
2016 }
2017 }
2018 // Slow case allocation
2019 CALL_VM(InterpreterRuntime::_new(THREAD, METHOD->constants(), index),
2020 handle_exception);
2021 SET_STACK_OBJECT(THREAD->vm_result(), 0);
2022 THREAD->set_vm_result(NULL);
2023 UPDATE_PC_AND_TOS_AND_CONTINUE(3, 1);
2024 }
2025 CASE(_anewarray): {
2026 u2 index = Bytes::get_Java_u2(pc+1);
2027 jint size = STACK_INT(-1);
2028 CALL_VM(InterpreterRuntime::anewarray(THREAD, METHOD->constants(), index, size),
2029 handle_exception);
2030 SET_STACK_OBJECT(THREAD->vm_result(), -1);
2031 THREAD->set_vm_result(NULL);
2032 UPDATE_PC_AND_CONTINUE(3);
2033 }
2034 CASE(_multianewarray): {
2035 jint dims = *(pc+3);
2036 jint size = STACK_INT(-1);
2037 // stack grows down, dimensions are up!
2038 jint *dimarray =
2039 (jint*)&topOfStack[dims * Interpreter::stackElementWords+
2040 Interpreter::stackElementWords-1];
2041 //adjust pointer to start of stack element
2042 CALL_VM(InterpreterRuntime::multianewarray(THREAD, dimarray),
2043 handle_exception);
2044 SET_STACK_OBJECT(THREAD->vm_result(), -dims);
2045 THREAD->set_vm_result(NULL);
2046 UPDATE_PC_AND_TOS_AND_CONTINUE(4, -(dims-1));
2047 }
2048 CASE(_checkcast):
2049 if (STACK_OBJECT(-1) != NULL) {
2050 VERIFY_OOP(STACK_OBJECT(-1));
2051 u2 index = Bytes::get_Java_u2(pc+1);
2052 if (ProfileInterpreter) {
2053 // needs Profile_checkcast QQQ
2054 ShouldNotReachHere();
2055 }
2056 // Constant pool may have actual klass or unresolved klass. If it is
2057 // unresolved we must resolve it
2058 if (METHOD->constants()->tag_at(index).is_unresolved_klass()) {
2059 CALL_VM(InterpreterRuntime::quicken_io_cc(THREAD), handle_exception);
2060 }
2061 Klass* klassOf = (Klass*) METHOD->constants()->slot_at(index).get_klass();
2062 Klass* objKlassOop = STACK_OBJECT(-1)->klass(); //ebx
2063 //
2064 // Check for compatibilty. This check must not GC!!
2065 // Seems way more expensive now that we must dispatch
2066 //
2067 if (objKlassOop != klassOf &&
2068 !objKlassOop->is_subtype_of(klassOf)) {
2069 ResourceMark rm(THREAD);
2070 const char* objName = objKlassOop->external_name();
2071 const char* klassName = klassOf->external_name();
2072 char* message = SharedRuntime::generate_class_cast_message(
2073 objName, klassName);
2074 VM_JAVA_ERROR(vmSymbols::java_lang_ClassCastException(), message);
2075 }
2076 } else {
2077 if (UncommonNullCast) {
2078 // istate->method()->set_null_cast_seen();
2079 // [RGV] Not sure what to do here!
2080
2081 }
2082 }
2083 UPDATE_PC_AND_CONTINUE(3);
2084
2085 CASE(_instanceof):
2086 if (STACK_OBJECT(-1) == NULL) {
2087 SET_STACK_INT(0, -1);
2088 } else {
2089 VERIFY_OOP(STACK_OBJECT(-1));
2090 u2 index = Bytes::get_Java_u2(pc+1);
2091 // Constant pool may have actual klass or unresolved klass. If it is
2092 // unresolved we must resolve it
2093 if (METHOD->constants()->tag_at(index).is_unresolved_klass()) {
2094 CALL_VM(InterpreterRuntime::quicken_io_cc(THREAD), handle_exception);
2095 }
2096 Klass* klassOf = (Klass*) METHOD->constants()->slot_at(index).get_klass();
2097 Klass* objKlassOop = STACK_OBJECT(-1)->klass();
2098 //
2099 // Check for compatibilty. This check must not GC!!
2100 // Seems way more expensive now that we must dispatch
2101 //
2102 if ( objKlassOop == klassOf || objKlassOop->is_subtype_of(klassOf)) {
2103 SET_STACK_INT(1, -1);
2104 } else {
2105 SET_STACK_INT(0, -1);
2106 }
2107 }
2108 UPDATE_PC_AND_CONTINUE(3);
2109
2110 CASE(_ldc_w):
2111 CASE(_ldc):
2112 {
2113 u2 index;
2114 bool wide = false;
2115 int incr = 2; // frequent case
2116 if (opcode == Bytecodes::_ldc) {
2117 index = pc[1];
2118 } else {
2119 index = Bytes::get_Java_u2(pc+1);
2120 incr = 3;
2121 wide = true;
2122 }
2123
2124 ConstantPool* constants = METHOD->constants();
2125 switch (constants->tag_at(index).value()) {
2126 case JVM_CONSTANT_Integer:
2127 SET_STACK_INT(constants->int_at(index), 0);
2128 break;
2129
2130 case JVM_CONSTANT_Float:
2131 SET_STACK_FLOAT(constants->float_at(index), 0);
2132 break;
2133
2134 case JVM_CONSTANT_String:
2135 {
2136 oop result = constants->resolved_references()->obj_at(index);
2137 if (result == NULL) {
2138 CALL_VM(InterpreterRuntime::resolve_ldc(THREAD, (Bytecodes::Code) opcode), handle_exception);
2139 SET_STACK_OBJECT(THREAD->vm_result(), 0);
2140 THREAD->set_vm_result(NULL);
2141 } else {
2142 VERIFY_OOP(result);
2143 SET_STACK_OBJECT(result, 0);
2144 }
2145 break;
2146 }
2147
2148 case JVM_CONSTANT_Class:
2149 VERIFY_OOP(constants->resolved_klass_at(index)->java_mirror());
2150 SET_STACK_OBJECT(constants->resolved_klass_at(index)->java_mirror(), 0);
2151 break;
2152
2153 case JVM_CONSTANT_UnresolvedClass:
2154 case JVM_CONSTANT_UnresolvedClassInError:
2155 CALL_VM(InterpreterRuntime::ldc(THREAD, wide), handle_exception);
2156 SET_STACK_OBJECT(THREAD->vm_result(), 0);
2157 THREAD->set_vm_result(NULL);
2158 break;
2159
2160 default: ShouldNotReachHere();
2161 }
2162 UPDATE_PC_AND_TOS_AND_CONTINUE(incr, 1);
2163 }
2164
2165 CASE(_ldc2_w):
2166 {
2167 u2 index = Bytes::get_Java_u2(pc+1);
2168
2169 ConstantPool* constants = METHOD->constants();
2170 switch (constants->tag_at(index).value()) {
2171
2172 case JVM_CONSTANT_Long:
2173 SET_STACK_LONG(constants->long_at(index), 1);
2174 break;
2175
2176 case JVM_CONSTANT_Double:
2177 SET_STACK_DOUBLE(constants->double_at(index), 1);
2178 break;
2179 default: ShouldNotReachHere();
2180 }
2181 UPDATE_PC_AND_TOS_AND_CONTINUE(3, 2);
2182 }
2183
2184 CASE(_fast_aldc_w):
2185 CASE(_fast_aldc): {
2186 u2 index;
2187 int incr;
2188 if (opcode == Bytecodes::_fast_aldc) {
2189 index = pc[1];
2190 incr = 2;
2191 } else {
2192 index = Bytes::get_native_u2(pc+1);
2193 incr = 3;
2194 }
2195
2196 // We are resolved if the f1 field contains a non-null object (CallSite, etc.)
2197 // This kind of CP cache entry does not need to match the flags byte, because
2198 // there is a 1-1 relation between bytecode type and CP entry type.
2199 ConstantPool* constants = METHOD->constants();
2200 oop result = constants->resolved_references()->obj_at(index);
2201 if (result == NULL) {
2202 CALL_VM(InterpreterRuntime::resolve_ldc(THREAD, (Bytecodes::Code) opcode),
2203 handle_exception);
2204 result = THREAD->vm_result();
2205 }
2206
2207 VERIFY_OOP(result);
2208 SET_STACK_OBJECT(result, 0);
2209 UPDATE_PC_AND_TOS_AND_CONTINUE(incr, 1);
2210 }
2211
2212 CASE(_invokedynamic): {
2213
2214 if (!EnableInvokeDynamic) {
2215 // We should not encounter this bytecode if !EnableInvokeDynamic.
2216 // The verifier will stop it. However, if we get past the verifier,
2217 // this will stop the thread in a reasonable way, without crashing the JVM.
2218 CALL_VM(InterpreterRuntime::throw_IncompatibleClassChangeError(THREAD),
2219 handle_exception);
2220 ShouldNotReachHere();
2221 }
2222
2223 u4 index = Bytes::get_native_u4(pc+1);
2224 ConstantPoolCacheEntry* cache = cp->constant_pool()->invokedynamic_cp_cache_entry_at(index);
2225
2226 // We are resolved if the resolved_references field contains a non-null object (CallSite, etc.)
2227 // This kind of CP cache entry does not need to match the flags byte, because
2228 // there is a 1-1 relation between bytecode type and CP entry type.
2229 if (! cache->is_resolved((Bytecodes::Code) opcode)) {
2230 CALL_VM(InterpreterRuntime::resolve_invokedynamic(THREAD),
2231 handle_exception);
2232 cache = cp->constant_pool()->invokedynamic_cp_cache_entry_at(index);
2233 }
2234
2235 Method* method = cache->f1_as_method();
2236 VERIFY_OOP(method);
2237
2238 if (cache->has_appendix()) {
2239 ConstantPool* constants = METHOD->constants();
2240 SET_STACK_OBJECT(cache->appendix_if_resolved(constants), 0);
2241 MORE_STACK(1);
2242 }
2243
2244 istate->set_msg(call_method);
2245 istate->set_callee(method);
2246 istate->set_callee_entry_point(method->from_interpreted_entry());
2247 istate->set_bcp_advance(5);
2248
2249 UPDATE_PC_AND_RETURN(0); // I'll be back...
2250 }
2251
2252 CASE(_invokehandle): {
2253
2254 if (!EnableInvokeDynamic) {
2255 ShouldNotReachHere();
2256 }
2257
2258 u2 index = Bytes::get_native_u2(pc+1);
2259 ConstantPoolCacheEntry* cache = cp->entry_at(index);
2260
2261 if (! cache->is_resolved((Bytecodes::Code) opcode)) {
2262 CALL_VM(InterpreterRuntime::resolve_invokehandle(THREAD),
2263 handle_exception);
2264 cache = cp->entry_at(index);
2265 }
2266
2267 Method* method = cache->f1_as_method();
2268
2269 VERIFY_OOP(method);
2270
2271 if (cache->has_appendix()) {
2272 ConstantPool* constants = METHOD->constants();
2273 SET_STACK_OBJECT(cache->appendix_if_resolved(constants), 0);
2274 MORE_STACK(1);
2275 }
2276
2277 istate->set_msg(call_method);
2278 istate->set_callee(method);
2279 istate->set_callee_entry_point(method->from_interpreted_entry());
2280 istate->set_bcp_advance(3);
2281
2282 UPDATE_PC_AND_RETURN(0); // I'll be back...
2283 }
2284
2285 CASE(_invokeinterface): {
2286 u2 index = Bytes::get_native_u2(pc+1);
2287
2288 // QQQ Need to make this as inlined as possible. Probably need to split all the bytecode cases
2289 // out so c++ compiler has a chance for constant prop to fold everything possible away.
2290
2291 ConstantPoolCacheEntry* cache = cp->entry_at(index);
2292 if (!cache->is_resolved((Bytecodes::Code)opcode)) {
2293 CALL_VM(InterpreterRuntime::resolve_invoke(THREAD, (Bytecodes::Code)opcode),
2294 handle_exception);
2295 cache = cp->entry_at(index);
2296 }
2297
2298 istate->set_msg(call_method);
2299
2300 // Special case of invokeinterface called for virtual method of
2301 // java.lang.Object. See cpCacheOop.cpp for details.
2302 // This code isn't produced by javac, but could be produced by
2303 // another compliant java compiler.
2304 if (cache->is_forced_virtual()) {
2305 Method* callee;
2306 CHECK_NULL(STACK_OBJECT(-(cache->parameter_size())));
2307 if (cache->is_vfinal()) {
2308 callee = cache->f2_as_vfinal_method();
2309 } else {
2310 // get receiver
2311 int parms = cache->parameter_size();
2312 // Same comments as invokevirtual apply here
2313 VERIFY_OOP(STACK_OBJECT(-parms));
2314 InstanceKlass* rcvrKlass = (InstanceKlass*)
2315 STACK_OBJECT(-parms)->klass();
2316 callee = (Method*) rcvrKlass->start_of_vtable()[ cache->f2_as_index()];
2317 }
2318 istate->set_callee(callee);
2319 istate->set_callee_entry_point(callee->from_interpreted_entry());
2320 #ifdef VM_JVMTI
2321 if (JvmtiExport::can_post_interpreter_events() && THREAD->is_interp_only_mode()) {
2322 istate->set_callee_entry_point(callee->interpreter_entry());
2323 }
2324 #endif /* VM_JVMTI */
2325 istate->set_bcp_advance(5);
2326 UPDATE_PC_AND_RETURN(0); // I'll be back...
2327 }
2328
2329 // this could definitely be cleaned up QQQ
2330 Method* callee;
2331 Klass* iclass = cache->f1_as_klass();
2332 // InstanceKlass* interface = (InstanceKlass*) iclass;
2333 // get receiver
2334 int parms = cache->parameter_size();
2335 oop rcvr = STACK_OBJECT(-parms);
2336 CHECK_NULL(rcvr);
2337 InstanceKlass* int2 = (InstanceKlass*) rcvr->klass();
2338 itableOffsetEntry* ki = (itableOffsetEntry*) int2->start_of_itable();
2339 int i;
2340 for ( i = 0 ; i < int2->itable_length() ; i++, ki++ ) {
2341 if (ki->interface_klass() == iclass) break;
2342 }
2343 // If the interface isn't found, this class doesn't implement this
2344 // interface. The link resolver checks this but only for the first
2345 // time this interface is called.
2346 if (i == int2->itable_length()) {
2347 VM_JAVA_ERROR(vmSymbols::java_lang_IncompatibleClassChangeError(), "");
2348 }
2349 int mindex = cache->f2_as_index();
2350 itableMethodEntry* im = ki->first_method_entry(rcvr->klass());
2351 callee = im[mindex].method();
2352 if (callee == NULL) {
2353 VM_JAVA_ERROR(vmSymbols::java_lang_AbstractMethodError(), "");
2354 }
2355
2356 istate->set_callee(callee);
2357 istate->set_callee_entry_point(callee->from_interpreted_entry());
2358 #ifdef VM_JVMTI
2359 if (JvmtiExport::can_post_interpreter_events() && THREAD->is_interp_only_mode()) {
2360 istate->set_callee_entry_point(callee->interpreter_entry());
2361 }
2362 #endif /* VM_JVMTI */
2363 istate->set_bcp_advance(5);
2364 UPDATE_PC_AND_RETURN(0); // I'll be back...
2365 }
2366
2367 CASE(_invokevirtual):
2368 CASE(_invokespecial):
2369 CASE(_invokestatic): {
2370 u2 index = Bytes::get_native_u2(pc+1);
2371
2372 ConstantPoolCacheEntry* cache = cp->entry_at(index);
2373 // QQQ Need to make this as inlined as possible. Probably need to split all the bytecode cases
2374 // out so c++ compiler has a chance for constant prop to fold everything possible away.
2375
2376 if (!cache->is_resolved((Bytecodes::Code)opcode)) {
2377 CALL_VM(InterpreterRuntime::resolve_invoke(THREAD, (Bytecodes::Code)opcode),
2378 handle_exception);
2379 cache = cp->entry_at(index);
2380 }
2381
2382 istate->set_msg(call_method);
2383 {
2384 Method* callee;
2385 if ((Bytecodes::Code)opcode == Bytecodes::_invokevirtual) {
2386 CHECK_NULL(STACK_OBJECT(-(cache->parameter_size())));
2387 if (cache->is_vfinal()) callee = cache->f2_as_vfinal_method();
2388 else {
2389 // get receiver
2390 int parms = cache->parameter_size();
2391 // this works but needs a resourcemark and seems to create a vtable on every call:
2392 // Method* callee = rcvr->klass()->vtable()->method_at(cache->f2_as_index());
2393 //
2394 // this fails with an assert
2395 // InstanceKlass* rcvrKlass = InstanceKlass::cast(STACK_OBJECT(-parms)->klass());
2396 // but this works
2397 VERIFY_OOP(STACK_OBJECT(-parms));
2398 InstanceKlass* rcvrKlass = (InstanceKlass*) STACK_OBJECT(-parms)->klass();
2399 /*
2400 Executing this code in java.lang.String:
2401 public String(char value[]) {
2402 this.count = value.length;
2403 this.value = (char[])value.clone();
2404 }
2405
2406 a find on rcvr->klass() reports:
2407 {type array char}{type array class}
2408 - klass: {other class}
2409
2410 but using InstanceKlass::cast(STACK_OBJECT(-parms)->klass()) causes in assertion failure
2411 because rcvr->klass()->oop_is_instance() == 0
2412 However it seems to have a vtable in the right location. Huh?
2413
2414 */
2415 callee = (Method*) rcvrKlass->start_of_vtable()[ cache->f2_as_index()];
2416 }
2417 } else {
2418 if ((Bytecodes::Code)opcode == Bytecodes::_invokespecial) {
2419 CHECK_NULL(STACK_OBJECT(-(cache->parameter_size())));
2420 }
2421 callee = cache->f1_as_method();
2422 }
2423
2424 istate->set_callee(callee);
2425 istate->set_callee_entry_point(callee->from_interpreted_entry());
2426 #ifdef VM_JVMTI
2427 if (JvmtiExport::can_post_interpreter_events() && THREAD->is_interp_only_mode()) {
2428 istate->set_callee_entry_point(callee->interpreter_entry());
2429 }
2430 #endif /* VM_JVMTI */
2431 istate->set_bcp_advance(3);
2432 UPDATE_PC_AND_RETURN(0); // I'll be back...
2433 }
2434 }
2435
2436 /* Allocate memory for a new java object. */
2437
2438 CASE(_newarray): {
2439 BasicType atype = (BasicType) *(pc+1);
2440 jint size = STACK_INT(-1);
2441 CALL_VM(InterpreterRuntime::newarray(THREAD, atype, size),
2442 handle_exception);
2443 SET_STACK_OBJECT(THREAD->vm_result(), -1);
2444 THREAD->set_vm_result(NULL);
2445
2446 UPDATE_PC_AND_CONTINUE(2);
2447 }
2448
2449 /* Throw an exception. */
2450
2451 CASE(_athrow): {
2452 oop except_oop = STACK_OBJECT(-1);
2453 CHECK_NULL(except_oop);
2454 // set pending_exception so we use common code
2455 THREAD->set_pending_exception(except_oop, NULL, 0);
2456 goto handle_exception;
2457 }
2458
2459 /* goto and jsr. They are exactly the same except jsr pushes
2460 * the address of the next instruction first.
2461 */
2462
2463 CASE(_jsr): {
2464 /* push bytecode index on stack */
2465 SET_STACK_ADDR(((address)pc - (intptr_t)(istate->method()->code_base()) + 3), 0);
2466 MORE_STACK(1);
2467 /* FALL THROUGH */
2468 }
2469
2470 CASE(_goto):
2471 {
2472 int16_t offset = (int16_t)Bytes::get_Java_u2(pc + 1);
2473 address branch_pc = pc;
2474 UPDATE_PC(offset);
2475 DO_BACKEDGE_CHECKS(offset, branch_pc);
2476 CONTINUE;
2477 }
2478
2479 CASE(_jsr_w): {
2480 /* push return address on the stack */
2481 SET_STACK_ADDR(((address)pc - (intptr_t)(istate->method()->code_base()) + 5), 0);
2482 MORE_STACK(1);
2483 /* FALL THROUGH */
2484 }
2485
2486 CASE(_goto_w):
2487 {
2488 int32_t offset = Bytes::get_Java_u4(pc + 1);
2489 address branch_pc = pc;
2490 UPDATE_PC(offset);
2491 DO_BACKEDGE_CHECKS(offset, branch_pc);
2492 CONTINUE;
2493 }
2494
2495 /* return from a jsr or jsr_w */
2496
2497 CASE(_ret): {
2498 pc = istate->method()->code_base() + (intptr_t)(LOCALS_ADDR(pc[1]));
2499 UPDATE_PC_AND_CONTINUE(0);
2500 }
2501
2502 /* debugger breakpoint */
2503
2504 CASE(_breakpoint): {
2505 Bytecodes::Code original_bytecode;
2506 DECACHE_STATE();
2507 SET_LAST_JAVA_FRAME();
2508 original_bytecode = InterpreterRuntime::get_original_bytecode_at(THREAD,
2509 METHOD, pc);
2510 RESET_LAST_JAVA_FRAME();
2511 CACHE_STATE();
2512 if (THREAD->has_pending_exception()) goto handle_exception;
2513 CALL_VM(InterpreterRuntime::_breakpoint(THREAD, METHOD, pc),
2514 handle_exception);
2515
2516 opcode = (jubyte)original_bytecode;
2517 goto opcode_switch;
2518 }
2519
2520 DEFAULT:
2521 fatal(err_msg("Unimplemented opcode %d = %s", opcode,
2522 Bytecodes::name((Bytecodes::Code)opcode)));
2523 goto finish;
2524
2525 } /* switch(opc) */
2526
2527
2528 #ifdef USELABELS
2529 check_for_exception:
2530 #endif
2531 {
2532 if (!THREAD->has_pending_exception()) {
2533 CONTINUE;
2534 }
2535 /* We will be gcsafe soon, so flush our state. */
2536 DECACHE_PC();
2537 goto handle_exception;
2538 }
2539 do_continue: ;
2540
2541 } /* while (1) interpreter loop */
2542
2543
2544 // An exception exists in the thread state see whether this activation can handle it
2545 handle_exception: {
2546
2547 HandleMarkCleaner __hmc(THREAD);
2548 Handle except_oop(THREAD, THREAD->pending_exception());
2549 // Prevent any subsequent HandleMarkCleaner in the VM
2550 // from freeing the except_oop handle.
2551 HandleMark __hm(THREAD);
2552
2553 THREAD->clear_pending_exception();
2554 assert(except_oop(), "No exception to process");
2555 intptr_t continuation_bci;
2556 // expression stack is emptied
2557 topOfStack = istate->stack_base() - Interpreter::stackElementWords;
2558 CALL_VM(continuation_bci = (intptr_t)InterpreterRuntime::exception_handler_for_exception(THREAD, except_oop()),
2559 handle_exception);
2560
2561 except_oop = THREAD->vm_result();
2562 THREAD->set_vm_result(NULL);
2563 if (continuation_bci >= 0) {
2564 // Place exception on top of stack
2565 SET_STACK_OBJECT(except_oop(), 0);
2566 MORE_STACK(1);
2567 pc = METHOD->code_base() + continuation_bci;
2568 if (TraceExceptions) {
2569 ttyLocker ttyl;
2570 ResourceMark rm;
2571 tty->print_cr("Exception <%s> (" INTPTR_FORMAT ")", except_oop->print_value_string(), except_oop());
2572 tty->print_cr(" thrown in interpreter method <%s>", METHOD->print_value_string());
2573 tty->print_cr(" at bci %d, continuing at %d for thread " INTPTR_FORMAT,
2574 pc - (intptr_t)METHOD->code_base(),
2575 continuation_bci, THREAD);
2576 }
2577 // for AbortVMOnException flag
2578 NOT_PRODUCT(Exceptions::debug_check_abort(except_oop));
2579 goto run;
2580 }
2581 if (TraceExceptions) {
2582 ttyLocker ttyl;
2583 ResourceMark rm;
2584 tty->print_cr("Exception <%s> (" INTPTR_FORMAT ")", except_oop->print_value_string(), except_oop());
2585 tty->print_cr(" thrown in interpreter method <%s>", METHOD->print_value_string());
2586 tty->print_cr(" at bci %d, unwinding for thread " INTPTR_FORMAT,
2587 pc - (intptr_t) METHOD->code_base(),
2588 THREAD);
2589 }
2590 // for AbortVMOnException flag
2591 NOT_PRODUCT(Exceptions::debug_check_abort(except_oop));
2592 // No handler in this activation, unwind and try again
2593 THREAD->set_pending_exception(except_oop(), NULL, 0);
2594 goto handle_return;
2595 } /* handle_exception: */
2596
2597
2598
2599 // Return from an interpreter invocation with the result of the interpretation
2600 // on the top of the Java Stack (or a pending exception)
2601
2602 handle_Pop_Frame:
2603
2604 // We don't really do anything special here except we must be aware
2605 // that we can get here without ever locking the method (if sync).
2606 // Also we skip the notification of the exit.
2607
2608 istate->set_msg(popping_frame);
2609 // Clear pending so while the pop is in process
2610 // we don't start another one if a call_vm is done.
2611 THREAD->clr_pop_frame_pending();
2612 // Let interpreter (only) see the we're in the process of popping a frame
2613 THREAD->set_pop_frame_in_process();
2614
2615 handle_return:
2616 {
2617 DECACHE_STATE();
2618
2619 bool suppress_error = istate->msg() == popping_frame;
2620 bool suppress_exit_event = THREAD->has_pending_exception() || suppress_error;
2621 Handle original_exception(THREAD, THREAD->pending_exception());
2622 Handle illegal_state_oop(THREAD, NULL);
2623
2624 // We'd like a HandleMark here to prevent any subsequent HandleMarkCleaner
2625 // in any following VM entries from freeing our live handles, but illegal_state_oop
2626 // isn't really allocated yet and so doesn't become live until later and
2627 // in unpredicatable places. Instead we must protect the places where we enter the
2628 // VM. It would be much simpler (and safer) if we could allocate a real handle with
2629 // a NULL oop in it and then overwrite the oop later as needed. This isn't
2630 // unfortunately isn't possible.
2631
2632 THREAD->clear_pending_exception();
2633
2634 //
2635 // As far as we are concerned we have returned. If we have a pending exception
2636 // that will be returned as this invocation's result. However if we get any
2637 // exception(s) while checking monitor state one of those IllegalMonitorStateExceptions
2638 // will be our final result (i.e. monitor exception trumps a pending exception).
2639 //
2640
2641 // If we never locked the method (or really passed the point where we would have),
2642 // there is no need to unlock it (or look for other monitors), since that
2643 // could not have happened.
2644
2645 if (THREAD->do_not_unlock()) {
2646
2647 // Never locked, reset the flag now because obviously any caller must
2648 // have passed their point of locking for us to have gotten here.
2649
2650 THREAD->clr_do_not_unlock();
2651 } else {
2652 // At this point we consider that we have returned. We now check that the
2653 // locks were properly block structured. If we find that they were not
2654 // used properly we will return with an illegal monitor exception.
2655 // The exception is checked by the caller not the callee since this
2656 // checking is considered to be part of the invocation and therefore
2657 // in the callers scope (JVM spec 8.13).
2658 //
2659 // Another weird thing to watch for is if the method was locked
2660 // recursively and then not exited properly. This means we must
2661 // examine all the entries in reverse time(and stack) order and
2662 // unlock as we find them. If we find the method monitor before
2663 // we are at the initial entry then we should throw an exception.
2664 // It is not clear the template based interpreter does this
2665 // correctly
2666
2667 BasicObjectLock* base = istate->monitor_base();
2668 BasicObjectLock* end = (BasicObjectLock*) istate->stack_base();
2669 bool method_unlock_needed = METHOD->is_synchronized();
2670 // We know the initial monitor was used for the method don't check that
2671 // slot in the loop
2672 if (method_unlock_needed) base--;
2673
2674 // Check all the monitors to see they are unlocked. Install exception if found to be locked.
2675 while (end < base) {
2676 oop lockee = end->obj();
2677 if (lockee != NULL) {
2678 BasicLock* lock = end->lock();
2679 markOop header = lock->displaced_header();
2680 end->set_obj(NULL);
2681 // If it isn't recursive we either must swap old header or call the runtime
2682 if (header != NULL) {
2683 if (Atomic::cmpxchg_ptr(header, lockee->mark_addr(), lock) != lock) {
2684 // restore object for the slow case
2685 end->set_obj(lockee);
2686 {
2687 // Prevent any HandleMarkCleaner from freeing our live handles
2688 HandleMark __hm(THREAD);
2689 CALL_VM_NOCHECK(InterpreterRuntime::monitorexit(THREAD, end));
2690 }
2691 }
2692 }
2693 // One error is plenty
2694 if (illegal_state_oop() == NULL && !suppress_error) {
2695 {
2696 // Prevent any HandleMarkCleaner from freeing our live handles
2697 HandleMark __hm(THREAD);
2698 CALL_VM_NOCHECK(InterpreterRuntime::throw_illegal_monitor_state_exception(THREAD));
2699 }
2700 assert(THREAD->has_pending_exception(), "Lost our exception!");
2701 illegal_state_oop = THREAD->pending_exception();
2702 THREAD->clear_pending_exception();
2703 }
2704 }
2705 end++;
2706 }
2707 // Unlock the method if needed
2708 if (method_unlock_needed) {
2709 if (base->obj() == NULL) {
2710 // The method is already unlocked this is not good.
2711 if (illegal_state_oop() == NULL && !suppress_error) {
2712 {
2713 // Prevent any HandleMarkCleaner from freeing our live handles
2714 HandleMark __hm(THREAD);
2715 CALL_VM_NOCHECK(InterpreterRuntime::throw_illegal_monitor_state_exception(THREAD));
2716 }
2717 assert(THREAD->has_pending_exception(), "Lost our exception!");
2718 illegal_state_oop = THREAD->pending_exception();
2719 THREAD->clear_pending_exception();
2720 }
2721 } else {
2722 //
2723 // The initial monitor is always used for the method
2724 // However if that slot is no longer the oop for the method it was unlocked
2725 // and reused by something that wasn't unlocked!
2726 //
2727 // deopt can come in with rcvr dead because c2 knows
2728 // its value is preserved in the monitor. So we can't use locals[0] at all
2729 // and must use first monitor slot.
2730 //
2731 oop rcvr = base->obj();
2732 if (rcvr == NULL) {
2733 if (!suppress_error) {
2734 VM_JAVA_ERROR_NO_JUMP(vmSymbols::java_lang_NullPointerException(), "");
2735 illegal_state_oop = THREAD->pending_exception();
2736 THREAD->clear_pending_exception();
2737 }
2738 } else {
2739 BasicLock* lock = base->lock();
2740 markOop header = lock->displaced_header();
2741 base->set_obj(NULL);
2742 // If it isn't recursive we either must swap old header or call the runtime
2743 if (header != NULL) {
2744 if (Atomic::cmpxchg_ptr(header, rcvr->mark_addr(), lock) != lock) {
2745 // restore object for the slow case
2746 base->set_obj(rcvr);
2747 {
2748 // Prevent any HandleMarkCleaner from freeing our live handles
2749 HandleMark __hm(THREAD);
2750 CALL_VM_NOCHECK(InterpreterRuntime::monitorexit(THREAD, base));
2751 }
2752 if (THREAD->has_pending_exception()) {
2753 if (!suppress_error) illegal_state_oop = THREAD->pending_exception();
2754 THREAD->clear_pending_exception();
2755 }
2756 }
2757 }
2758 }
2759 }
2760 }
2761 }
2762
2763 //
2764 // Notify jvmti/jvmdi
2765 //
2766 // NOTE: we do not notify a method_exit if we have a pending exception,
2767 // including an exception we generate for unlocking checks. In the former
2768 // case, JVMDI has already been notified by our call for the exception handler
2769 // and in both cases as far as JVMDI is concerned we have already returned.
2770 // If we notify it again JVMDI will be all confused about how many frames
2771 // are still on the stack (4340444).
2772 //
2773 // NOTE Further! It turns out the the JVMTI spec in fact expects to see
2774 // method_exit events whenever we leave an activation unless it was done
2775 // for popframe. This is nothing like jvmdi. However we are passing the
2776 // tests at the moment (apparently because they are jvmdi based) so rather
2777 // than change this code and possibly fail tests we will leave it alone
2778 // (with this note) in anticipation of changing the vm and the tests
2779 // simultaneously.
2780
2781
2782 //
2783 suppress_exit_event = suppress_exit_event || illegal_state_oop() != NULL;
2784
2785
2786
2787 #ifdef VM_JVMTI
2788 if (_jvmti_interp_events) {
2789 // Whenever JVMTI puts a thread in interp_only_mode, method
2790 // entry/exit events are sent for that thread to track stack depth.
2791 if ( !suppress_exit_event && THREAD->is_interp_only_mode() ) {
2792 {
2793 // Prevent any HandleMarkCleaner from freeing our live handles
2794 HandleMark __hm(THREAD);
2795 CALL_VM_NOCHECK(InterpreterRuntime::post_method_exit(THREAD));
2796 }
2797 }
2798 }
2799 #endif /* VM_JVMTI */
2800
2801 //
2802 // See if we are returning any exception
2803 // A pending exception that was pending prior to a possible popping frame
2804 // overrides the popping frame.
2805 //
2806 assert(!suppress_error || suppress_error && illegal_state_oop() == NULL, "Error was not suppressed");
2807 if (illegal_state_oop() != NULL || original_exception() != NULL) {
2808 // inform the frame manager we have no result
2809 istate->set_msg(throwing_exception);
2810 if (illegal_state_oop() != NULL)
2811 THREAD->set_pending_exception(illegal_state_oop(), NULL, 0);
2812 else
2813 THREAD->set_pending_exception(original_exception(), NULL, 0);
2814 istate->set_return_kind((Bytecodes::Code)opcode);
2815 UPDATE_PC_AND_RETURN(0);
2816 }
2817
2818 if (istate->msg() == popping_frame) {
2819 // Make it simpler on the assembly code and set the message for the frame pop.
2820 // returns
2821 if (istate->prev() == NULL) {
2822 // We must be returning to a deoptimized frame (because popframe only happens between
2823 // two interpreted frames). We need to save the current arguments in C heap so that
2824 // the deoptimized frame when it restarts can copy the arguments to its expression
2825 // stack and re-execute the call. We also have to notify deoptimization that this
2826 // has occurred and to pick the preserved args copy them to the deoptimized frame's
2827 // java expression stack. Yuck.
2828 //
2829 THREAD->popframe_preserve_args(in_ByteSize(METHOD->size_of_parameters() * wordSize),
2830 LOCALS_SLOT(METHOD->size_of_parameters() - 1));
2831 THREAD->set_popframe_condition_bit(JavaThread::popframe_force_deopt_reexecution_bit);
2832 }
2833 THREAD->clr_pop_frame_in_process();
2834 }
2835
2836 // Normal return
2837 // Advance the pc and return to frame manager
2838 istate->set_msg(return_from_method);
2839 istate->set_return_kind((Bytecodes::Code)opcode);
2840 UPDATE_PC_AND_RETURN(1);
2841 } /* handle_return: */
2842
2843 // This is really a fatal error return
2844
2845 finish:
2846 DECACHE_TOS();
2847 DECACHE_PC();
2848
2849 return;
2850 }
2851
2852 /*
2853 * All the code following this point is only produced once and is not present
2854 * in the JVMTI version of the interpreter
2855 */
2856
2857 #ifndef VM_JVMTI
2858
2859 // This constructor should only be used to contruct the object to signal
2860 // interpreter initialization. All other instances should be created by
2861 // the frame manager.
2862 BytecodeInterpreter::BytecodeInterpreter(messages msg) {
2863 if (msg != initialize) ShouldNotReachHere();
2864 _msg = msg;
2865 _self_link = this;
2866 _prev_link = NULL;
2867 }
2868
2869 // Inline static functions for Java Stack and Local manipulation
2870
2871 // The implementations are platform dependent. We have to worry about alignment
2872 // issues on some machines which can change on the same platform depending on
2873 // whether it is an LP64 machine also.
2874 address BytecodeInterpreter::stack_slot(intptr_t *tos, int offset) {
2875 return (address) tos[Interpreter::expr_index_at(-offset)];
2876 }
2877
2878 jint BytecodeInterpreter::stack_int(intptr_t *tos, int offset) {
2879 return *((jint*) &tos[Interpreter::expr_index_at(-offset)]);
2880 }
2881
2882 jfloat BytecodeInterpreter::stack_float(intptr_t *tos, int offset) {
2883 return *((jfloat *) &tos[Interpreter::expr_index_at(-offset)]);
2884 }
2885
2886 oop BytecodeInterpreter::stack_object(intptr_t *tos, int offset) {
2887 return (oop)tos [Interpreter::expr_index_at(-offset)];
2888 }
2889
2890 jdouble BytecodeInterpreter::stack_double(intptr_t *tos, int offset) {
2891 return ((VMJavaVal64*) &tos[Interpreter::expr_index_at(-offset)])->d;
2892 }
2893
2894 jlong BytecodeInterpreter::stack_long(intptr_t *tos, int offset) {
2895 return ((VMJavaVal64 *) &tos[Interpreter::expr_index_at(-offset)])->l;
2896 }
2897
2898 // only used for value types
2899 void BytecodeInterpreter::set_stack_slot(intptr_t *tos, address value,
2900 int offset) {
2901 *((address *)&tos[Interpreter::expr_index_at(-offset)]) = value;
2902 }
2903
2904 void BytecodeInterpreter::set_stack_int(intptr_t *tos, int value,
2905 int offset) {
2906 *((jint *)&tos[Interpreter::expr_index_at(-offset)]) = value;
2907 }
2908
2909 void BytecodeInterpreter::set_stack_float(intptr_t *tos, jfloat value,
2910 int offset) {
2911 *((jfloat *)&tos[Interpreter::expr_index_at(-offset)]) = value;
2912 }
2913
2914 void BytecodeInterpreter::set_stack_object(intptr_t *tos, oop value,
2915 int offset) {
2916 *((oop *)&tos[Interpreter::expr_index_at(-offset)]) = value;
2917 }
2918
2919 // needs to be platform dep for the 32 bit platforms.
2920 void BytecodeInterpreter::set_stack_double(intptr_t *tos, jdouble value,
2921 int offset) {
2922 ((VMJavaVal64*)&tos[Interpreter::expr_index_at(-offset)])->d = value;
2923 }
2924
2925 void BytecodeInterpreter::set_stack_double_from_addr(intptr_t *tos,
2926 address addr, int offset) {
2927 (((VMJavaVal64*)&tos[Interpreter::expr_index_at(-offset)])->d =
2928 ((VMJavaVal64*)addr)->d);
2929 }
2930
2931 void BytecodeInterpreter::set_stack_long(intptr_t *tos, jlong value,
2932 int offset) {
2933 ((VMJavaVal64*)&tos[Interpreter::expr_index_at(-offset+1)])->l = 0xdeedbeeb;
2934 ((VMJavaVal64*)&tos[Interpreter::expr_index_at(-offset)])->l = value;
2935 }
2936
2937 void BytecodeInterpreter::set_stack_long_from_addr(intptr_t *tos,
2938 address addr, int offset) {
2939 ((VMJavaVal64*)&tos[Interpreter::expr_index_at(-offset+1)])->l = 0xdeedbeeb;
2940 ((VMJavaVal64*)&tos[Interpreter::expr_index_at(-offset)])->l =
2941 ((VMJavaVal64*)addr)->l;
2942 }
2943
2944 // Locals
2945
2946 address BytecodeInterpreter::locals_slot(intptr_t* locals, int offset) {
2947 return (address)locals[Interpreter::local_index_at(-offset)];
2948 }
2949 jint BytecodeInterpreter::locals_int(intptr_t* locals, int offset) {
2950 return (jint)locals[Interpreter::local_index_at(-offset)];
2951 }
2952 jfloat BytecodeInterpreter::locals_float(intptr_t* locals, int offset) {
2953 return (jfloat)locals[Interpreter::local_index_at(-offset)];
2954 }
2955 oop BytecodeInterpreter::locals_object(intptr_t* locals, int offset) {
2956 return (oop)locals[Interpreter::local_index_at(-offset)];
2957 }
2958 jdouble BytecodeInterpreter::locals_double(intptr_t* locals, int offset) {
2959 return ((VMJavaVal64*)&locals[Interpreter::local_index_at(-(offset+1))])->d;
2960 }
2961 jlong BytecodeInterpreter::locals_long(intptr_t* locals, int offset) {
2962 return ((VMJavaVal64*)&locals[Interpreter::local_index_at(-(offset+1))])->l;
2963 }
2964
2965 // Returns the address of locals value.
2966 address BytecodeInterpreter::locals_long_at(intptr_t* locals, int offset) {
2967 return ((address)&locals[Interpreter::local_index_at(-(offset+1))]);
2968 }
2969 address BytecodeInterpreter::locals_double_at(intptr_t* locals, int offset) {
2970 return ((address)&locals[Interpreter::local_index_at(-(offset+1))]);
2971 }
2972
2973 // Used for local value or returnAddress
2974 void BytecodeInterpreter::set_locals_slot(intptr_t *locals,
2975 address value, int offset) {
2976 *((address*)&locals[Interpreter::local_index_at(-offset)]) = value;
2977 }
2978 void BytecodeInterpreter::set_locals_int(intptr_t *locals,
2979 jint value, int offset) {
2980 *((jint *)&locals[Interpreter::local_index_at(-offset)]) = value;
2981 }
2982 void BytecodeInterpreter::set_locals_float(intptr_t *locals,
2983 jfloat value, int offset) {
2984 *((jfloat *)&locals[Interpreter::local_index_at(-offset)]) = value;
2985 }
2986 void BytecodeInterpreter::set_locals_object(intptr_t *locals,
2987 oop value, int offset) {
2988 *((oop *)&locals[Interpreter::local_index_at(-offset)]) = value;
2989 }
2990 void BytecodeInterpreter::set_locals_double(intptr_t *locals,
2991 jdouble value, int offset) {
2992 ((VMJavaVal64*)&locals[Interpreter::local_index_at(-(offset+1))])->d = value;
2993 }
2994 void BytecodeInterpreter::set_locals_long(intptr_t *locals,
2995 jlong value, int offset) {
2996 ((VMJavaVal64*)&locals[Interpreter::local_index_at(-(offset+1))])->l = value;
2997 }
2998 void BytecodeInterpreter::set_locals_double_from_addr(intptr_t *locals,
2999 address addr, int offset) {
3000 ((VMJavaVal64*)&locals[Interpreter::local_index_at(-(offset+1))])->d = ((VMJavaVal64*)addr)->d;
3001 }
3002 void BytecodeInterpreter::set_locals_long_from_addr(intptr_t *locals,
3003 address addr, int offset) {
3004 ((VMJavaVal64*)&locals[Interpreter::local_index_at(-(offset+1))])->l = ((VMJavaVal64*)addr)->l;
3005 }
3006
3007 void BytecodeInterpreter::astore(intptr_t* tos, int stack_offset,
3008 intptr_t* locals, int locals_offset) {
3009 intptr_t value = tos[Interpreter::expr_index_at(-stack_offset)];
3010 locals[Interpreter::local_index_at(-locals_offset)] = value;
3011 }
3012
3013
3014 void BytecodeInterpreter::copy_stack_slot(intptr_t *tos, int from_offset,
3015 int to_offset) {
3016 tos[Interpreter::expr_index_at(-to_offset)] =
3017 (intptr_t)tos[Interpreter::expr_index_at(-from_offset)];
3018 }
3019
3020 void BytecodeInterpreter::dup(intptr_t *tos) {
3021 copy_stack_slot(tos, -1, 0);
3022 }
3023 void BytecodeInterpreter::dup2(intptr_t *tos) {
3024 copy_stack_slot(tos, -2, 0);
3025 copy_stack_slot(tos, -1, 1);
3026 }
3027
3028 void BytecodeInterpreter::dup_x1(intptr_t *tos) {
3029 /* insert top word two down */
3030 copy_stack_slot(tos, -1, 0);
3031 copy_stack_slot(tos, -2, -1);
3032 copy_stack_slot(tos, 0, -2);
3033 }
3034
3035 void BytecodeInterpreter::dup_x2(intptr_t *tos) {
3036 /* insert top word three down */
3037 copy_stack_slot(tos, -1, 0);
3038 copy_stack_slot(tos, -2, -1);
3039 copy_stack_slot(tos, -3, -2);
3040 copy_stack_slot(tos, 0, -3);
3041 }
3042 void BytecodeInterpreter::dup2_x1(intptr_t *tos) {
3043 /* insert top 2 slots three down */
3044 copy_stack_slot(tos, -1, 1);
3045 copy_stack_slot(tos, -2, 0);
3046 copy_stack_slot(tos, -3, -1);
3047 copy_stack_slot(tos, 1, -2);
3048 copy_stack_slot(tos, 0, -3);
3049 }
3050 void BytecodeInterpreter::dup2_x2(intptr_t *tos) {
3051 /* insert top 2 slots four down */
3052 copy_stack_slot(tos, -1, 1);
3053 copy_stack_slot(tos, -2, 0);
3054 copy_stack_slot(tos, -3, -1);
3055 copy_stack_slot(tos, -4, -2);
3056 copy_stack_slot(tos, 1, -3);
3057 copy_stack_slot(tos, 0, -4);
3058 }
3059
3060
3061 void BytecodeInterpreter::swap(intptr_t *tos) {
3062 // swap top two elements
3063 intptr_t val = tos[Interpreter::expr_index_at(1)];
3064 // Copy -2 entry to -1
3065 copy_stack_slot(tos, -2, -1);
3066 // Store saved -1 entry into -2
3067 tos[Interpreter::expr_index_at(2)] = val;
3068 }
3069 // --------------------------------------------------------------------------------
3070 // Non-product code
3071 #ifndef PRODUCT
3072
3073 const char* BytecodeInterpreter::C_msg(BytecodeInterpreter::messages msg) {
3074 switch (msg) {
3075 case BytecodeInterpreter::no_request: return("no_request");
3076 case BytecodeInterpreter::initialize: return("initialize");
3077 // status message to C++ interpreter
3078 case BytecodeInterpreter::method_entry: return("method_entry");
3079 case BytecodeInterpreter::method_resume: return("method_resume");
3080 case BytecodeInterpreter::got_monitors: return("got_monitors");
3081 case BytecodeInterpreter::rethrow_exception: return("rethrow_exception");
3082 // requests to frame manager from C++ interpreter
3083 case BytecodeInterpreter::call_method: return("call_method");
3084 case BytecodeInterpreter::return_from_method: return("return_from_method");
3085 case BytecodeInterpreter::more_monitors: return("more_monitors");
3086 case BytecodeInterpreter::throwing_exception: return("throwing_exception");
3087 case BytecodeInterpreter::popping_frame: return("popping_frame");
3088 case BytecodeInterpreter::do_osr: return("do_osr");
3089 // deopt
3090 case BytecodeInterpreter::deopt_resume: return("deopt_resume");
3091 case BytecodeInterpreter::deopt_resume2: return("deopt_resume2");
3092 default: return("BAD MSG");
3093 }
3094 }
3095 void
3096 BytecodeInterpreter::print() {
3097 tty->print_cr("thread: " INTPTR_FORMAT, (uintptr_t) this->_thread);
3098 tty->print_cr("bcp: " INTPTR_FORMAT, (uintptr_t) this->_bcp);
3099 tty->print_cr("locals: " INTPTR_FORMAT, (uintptr_t) this->_locals);
3100 tty->print_cr("constants: " INTPTR_FORMAT, (uintptr_t) this->_constants);
3101 {
3102 ResourceMark rm;
3103 char *method_name = _method->name_and_sig_as_C_string();
3104 tty->print_cr("method: " INTPTR_FORMAT "[ %s ]", (uintptr_t) this->_method, method_name);
3105 }
3106 tty->print_cr("mdx: " INTPTR_FORMAT, (uintptr_t) this->_mdx);
3107 tty->print_cr("stack: " INTPTR_FORMAT, (uintptr_t) this->_stack);
3108 tty->print_cr("msg: %s", C_msg(this->_msg));
3109 tty->print_cr("result_to_call._callee: " INTPTR_FORMAT, (uintptr_t) this->_result._to_call._callee);
3110 tty->print_cr("result_to_call._callee_entry_point: " INTPTR_FORMAT, (uintptr_t) this->_result._to_call._callee_entry_point);
3111 tty->print_cr("result_to_call._bcp_advance: %d ", this->_result._to_call._bcp_advance);
3112 tty->print_cr("osr._osr_buf: " INTPTR_FORMAT, (uintptr_t) this->_result._osr._osr_buf);
3113 tty->print_cr("osr._osr_entry: " INTPTR_FORMAT, (uintptr_t) this->_result._osr._osr_entry);
3114 tty->print_cr("result_return_kind 0x%x ", (int) this->_result._return_kind);
3115 tty->print_cr("prev_link: " INTPTR_FORMAT, (uintptr_t) this->_prev_link);
3116 tty->print_cr("native_mirror: " INTPTR_FORMAT, (uintptr_t) this->_oop_temp);
3117 tty->print_cr("stack_base: " INTPTR_FORMAT, (uintptr_t) this->_stack_base);
3118 tty->print_cr("stack_limit: " INTPTR_FORMAT, (uintptr_t) this->_stack_limit);
3119 tty->print_cr("monitor_base: " INTPTR_FORMAT, (uintptr_t) this->_monitor_base);
3120 #ifdef SPARC
3121 tty->print_cr("last_Java_pc: " INTPTR_FORMAT, (uintptr_t) this->_last_Java_pc);
3122 tty->print_cr("frame_bottom: " INTPTR_FORMAT, (uintptr_t) this->_frame_bottom);
3123 tty->print_cr("&native_fresult: " INTPTR_FORMAT, (uintptr_t) &this->_native_fresult);
3124 tty->print_cr("native_lresult: " INTPTR_FORMAT, (uintptr_t) this->_native_lresult);
3125 #endif
3126 #if !defined(ZERO)
3127 tty->print_cr("last_Java_fp: " INTPTR_FORMAT, (uintptr_t) this->_last_Java_fp);
3128 #endif // !ZERO
3129 tty->print_cr("self_link: " INTPTR_FORMAT, (uintptr_t) this->_self_link);
3130 }
3131
3132 extern "C" {
3133 void PI(uintptr_t arg) {
3134 ((BytecodeInterpreter*)arg)->print();
3135 }
3136 }
3137 #endif // PRODUCT
3138
3139 #endif // JVMTI
3140 #endif // CC_INTERP