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src/share/vm/interpreter/bytecodeInterpreter.cpp@427b2fb1944f
src/share/vm/interpreter/bytecodeInterpreter.cpp
Wed, 31 Jan 2018 19:24:57 -0500
- author
- dbuck
- date
- Wed, 31 Jan 2018 19:24:57 -0500
- changeset 9289
- 427b2fb1944f
- parent 8429
- 8f58998958ca
- child 8604
- 04d83ba48607
- child 9110
- 56123fdca84a
- permissions
- -rw-r--r--
8189170: Add option to disable stack overflow checking in primordial thread for use with JNI_CreateJavaJVM
Reviewed-by: dcubed
1 /*
2 * Copyright (c) 2002, 2016, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
23 */
25 // no precompiled headers
26 #include "classfile/vmSymbols.hpp"
27 #include "gc_interface/collectedHeap.hpp"
28 #include "interpreter/bytecodeHistogram.hpp"
29 #include "interpreter/bytecodeInterpreter.hpp"
30 #include "interpreter/bytecodeInterpreter.inline.hpp"
31 #include "interpreter/bytecodeInterpreterProfiling.hpp"
32 #include "interpreter/interpreter.hpp"
33 #include "interpreter/interpreterRuntime.hpp"
34 #include "memory/resourceArea.hpp"
35 #include "oops/methodCounters.hpp"
36 #include "oops/objArrayKlass.hpp"
37 #include "oops/oop.inline.hpp"
38 #include "prims/jvmtiExport.hpp"
39 #include "prims/jvmtiThreadState.hpp"
40 #include "runtime/biasedLocking.hpp"
41 #include "runtime/frame.inline.hpp"
42 #include "runtime/handles.inline.hpp"
43 #include "runtime/interfaceSupport.hpp"
44 #include "runtime/orderAccess.inline.hpp"
45 #include "runtime/sharedRuntime.hpp"
46 #include "runtime/threadCritical.hpp"
47 #include "utilities/exceptions.hpp"
49 // no precompiled headers
50 #ifdef CC_INTERP
52 /*
53 * USELABELS - If using GCC, then use labels for the opcode dispatching
54 * rather -then a switch statement. This improves performance because it
55 * gives us the oportunity to have the instructions that calculate the
56 * next opcode to jump to be intermixed with the rest of the instructions
57 * that implement the opcode (see UPDATE_PC_AND_TOS_AND_CONTINUE macro).
58 */
59 #undef USELABELS
60 #ifdef __GNUC__
61 /*
62 ASSERT signifies debugging. It is much easier to step thru bytecodes if we
63 don't use the computed goto approach.
64 */
65 #ifndef ASSERT
66 #define USELABELS
67 #endif
68 #endif
70 #undef CASE
71 #ifdef USELABELS
72 #define CASE(opcode) opc ## opcode
73 #define DEFAULT opc_default
74 #else
75 #define CASE(opcode) case Bytecodes:: opcode
76 #define DEFAULT default
77 #endif
79 /*
80 * PREFETCH_OPCCODE - Some compilers do better if you prefetch the next
81 * opcode before going back to the top of the while loop, rather then having
82 * the top of the while loop handle it. This provides a better opportunity
83 * for instruction scheduling. Some compilers just do this prefetch
84 * automatically. Some actually end up with worse performance if you
85 * force the prefetch. Solaris gcc seems to do better, but cc does worse.
86 */
87 #undef PREFETCH_OPCCODE
88 #define PREFETCH_OPCCODE
90 /*
91 Interpreter safepoint: it is expected that the interpreter will have no live
92 handles of its own creation live at an interpreter safepoint. Therefore we
93 run a HandleMarkCleaner and trash all handles allocated in the call chain
94 since the JavaCalls::call_helper invocation that initiated the chain.
95 There really shouldn't be any handles remaining to trash but this is cheap
96 in relation to a safepoint.
97 */
98 #define SAFEPOINT \
99 if ( SafepointSynchronize::is_synchronizing()) { \
100 { \
101 /* zap freed handles rather than GC'ing them */ \
102 HandleMarkCleaner __hmc(THREAD); \
103 } \
104 CALL_VM(SafepointSynchronize::block(THREAD), handle_exception); \
105 }
107 /*
108 * VM_JAVA_ERROR - Macro for throwing a java exception from
109 * the interpreter loop. Should really be a CALL_VM but there
110 * is no entry point to do the transition to vm so we just
111 * do it by hand here.
112 */
113 #define VM_JAVA_ERROR_NO_JUMP(name, msg, note_a_trap) \
114 DECACHE_STATE(); \
115 SET_LAST_JAVA_FRAME(); \
116 { \
117 InterpreterRuntime::note_a_trap(THREAD, istate->method(), BCI()); \
118 ThreadInVMfromJava trans(THREAD); \
119 Exceptions::_throw_msg(THREAD, __FILE__, __LINE__, name, msg); \
120 } \
121 RESET_LAST_JAVA_FRAME(); \
122 CACHE_STATE();
124 // Normal throw of a java error.
125 #define VM_JAVA_ERROR(name, msg, note_a_trap) \
126 VM_JAVA_ERROR_NO_JUMP(name, msg, note_a_trap) \
127 goto handle_exception;
129 #ifdef PRODUCT
130 #define DO_UPDATE_INSTRUCTION_COUNT(opcode)
131 #else
132 #define DO_UPDATE_INSTRUCTION_COUNT(opcode) \
133 { \
134 BytecodeCounter::_counter_value++; \
135 BytecodeHistogram::_counters[(Bytecodes::Code)opcode]++; \
136 if (StopInterpreterAt && StopInterpreterAt == BytecodeCounter::_counter_value) os::breakpoint(); \
137 if (TraceBytecodes) { \
138 CALL_VM((void)SharedRuntime::trace_bytecode(THREAD, 0, \
139 topOfStack[Interpreter::expr_index_at(1)], \
140 topOfStack[Interpreter::expr_index_at(2)]), \
141 handle_exception); \
142 } \
143 }
144 #endif
146 #undef DEBUGGER_SINGLE_STEP_NOTIFY
147 #ifdef VM_JVMTI
148 /* NOTE: (kbr) This macro must be called AFTER the PC has been
149 incremented. JvmtiExport::at_single_stepping_point() may cause a
150 breakpoint opcode to get inserted at the current PC to allow the
151 debugger to coalesce single-step events.
153 As a result if we call at_single_stepping_point() we refetch opcode
154 to get the current opcode. This will override any other prefetching
155 that might have occurred.
156 */
157 #define DEBUGGER_SINGLE_STEP_NOTIFY() \
158 { \
159 if (_jvmti_interp_events) { \
160 if (JvmtiExport::should_post_single_step()) { \
161 DECACHE_STATE(); \
162 SET_LAST_JAVA_FRAME(); \
163 ThreadInVMfromJava trans(THREAD); \
164 JvmtiExport::at_single_stepping_point(THREAD, \
165 istate->method(), \
166 pc); \
167 RESET_LAST_JAVA_FRAME(); \
168 CACHE_STATE(); \
169 if (THREAD->pop_frame_pending() && \
170 !THREAD->pop_frame_in_process()) { \
171 goto handle_Pop_Frame; \
172 } \
173 if (THREAD->jvmti_thread_state() && \
174 THREAD->jvmti_thread_state()->is_earlyret_pending()) { \
175 goto handle_Early_Return; \
176 } \
177 opcode = *pc; \
178 } \
179 } \
180 }
181 #else
182 #define DEBUGGER_SINGLE_STEP_NOTIFY()
183 #endif
185 /*
186 * CONTINUE - Macro for executing the next opcode.
187 */
188 #undef CONTINUE
189 #ifdef USELABELS
190 // Have to do this dispatch this way in C++ because otherwise gcc complains about crossing an
191 // initialization (which is is the initialization of the table pointer...)
192 #define DISPATCH(opcode) goto *(void*)dispatch_table[opcode]
193 #define CONTINUE { \
194 opcode = *pc; \
195 DO_UPDATE_INSTRUCTION_COUNT(opcode); \
196 DEBUGGER_SINGLE_STEP_NOTIFY(); \
197 DISPATCH(opcode); \
198 }
199 #else
200 #ifdef PREFETCH_OPCCODE
201 #define CONTINUE { \
202 opcode = *pc; \
203 DO_UPDATE_INSTRUCTION_COUNT(opcode); \
204 DEBUGGER_SINGLE_STEP_NOTIFY(); \
205 continue; \
206 }
207 #else
208 #define CONTINUE { \
209 DO_UPDATE_INSTRUCTION_COUNT(opcode); \
210 DEBUGGER_SINGLE_STEP_NOTIFY(); \
211 continue; \
212 }
213 #endif
214 #endif
217 #define UPDATE_PC(opsize) {pc += opsize; }
218 /*
219 * UPDATE_PC_AND_TOS - Macro for updating the pc and topOfStack.
220 */
221 #undef UPDATE_PC_AND_TOS
222 #define UPDATE_PC_AND_TOS(opsize, stack) \
223 {pc += opsize; MORE_STACK(stack); }
225 /*
226 * UPDATE_PC_AND_TOS_AND_CONTINUE - Macro for updating the pc and topOfStack,
227 * and executing the next opcode. It's somewhat similar to the combination
228 * of UPDATE_PC_AND_TOS and CONTINUE, but with some minor optimizations.
229 */
230 #undef UPDATE_PC_AND_TOS_AND_CONTINUE
231 #ifdef USELABELS
232 #define UPDATE_PC_AND_TOS_AND_CONTINUE(opsize, stack) { \
233 pc += opsize; opcode = *pc; MORE_STACK(stack); \
234 DO_UPDATE_INSTRUCTION_COUNT(opcode); \
235 DEBUGGER_SINGLE_STEP_NOTIFY(); \
236 DISPATCH(opcode); \
237 }
239 #define UPDATE_PC_AND_CONTINUE(opsize) { \
240 pc += opsize; opcode = *pc; \
241 DO_UPDATE_INSTRUCTION_COUNT(opcode); \
242 DEBUGGER_SINGLE_STEP_NOTIFY(); \
243 DISPATCH(opcode); \
244 }
245 #else
246 #ifdef PREFETCH_OPCCODE
247 #define UPDATE_PC_AND_TOS_AND_CONTINUE(opsize, stack) { \
248 pc += opsize; opcode = *pc; MORE_STACK(stack); \
249 DO_UPDATE_INSTRUCTION_COUNT(opcode); \
250 DEBUGGER_SINGLE_STEP_NOTIFY(); \
251 goto do_continue; \
252 }
254 #define UPDATE_PC_AND_CONTINUE(opsize) { \
255 pc += opsize; opcode = *pc; \
256 DO_UPDATE_INSTRUCTION_COUNT(opcode); \
257 DEBUGGER_SINGLE_STEP_NOTIFY(); \
258 goto do_continue; \
259 }
260 #else
261 #define UPDATE_PC_AND_TOS_AND_CONTINUE(opsize, stack) { \
262 pc += opsize; MORE_STACK(stack); \
263 DO_UPDATE_INSTRUCTION_COUNT(opcode); \
264 DEBUGGER_SINGLE_STEP_NOTIFY(); \
265 goto do_continue; \
266 }
268 #define UPDATE_PC_AND_CONTINUE(opsize) { \
269 pc += opsize; \
270 DO_UPDATE_INSTRUCTION_COUNT(opcode); \
271 DEBUGGER_SINGLE_STEP_NOTIFY(); \
272 goto do_continue; \
273 }
274 #endif /* PREFETCH_OPCCODE */
275 #endif /* USELABELS */
277 // About to call a new method, update the save the adjusted pc and return to frame manager
278 #define UPDATE_PC_AND_RETURN(opsize) \
279 DECACHE_TOS(); \
280 istate->set_bcp(pc+opsize); \
281 return;
284 #define METHOD istate->method()
285 #define GET_METHOD_COUNTERS(res) \
286 res = METHOD->method_counters(); \
287 if (res == NULL) { \
288 CALL_VM(res = InterpreterRuntime::build_method_counters(THREAD, METHOD), handle_exception); \
289 }
291 #define OSR_REQUEST(res, branch_pc) \
292 CALL_VM(res=InterpreterRuntime::frequency_counter_overflow(THREAD, branch_pc), handle_exception);
293 /*
294 * For those opcodes that need to have a GC point on a backwards branch
295 */
297 // Backedge counting is kind of strange. The asm interpreter will increment
298 // the backedge counter as a separate counter but it does it's comparisons
299 // to the sum (scaled) of invocation counter and backedge count to make
300 // a decision. Seems kind of odd to sum them together like that
302 // skip is delta from current bcp/bci for target, branch_pc is pre-branch bcp
305 #define DO_BACKEDGE_CHECKS(skip, branch_pc) \
306 if ((skip) <= 0) { \
307 MethodCounters* mcs; \
308 GET_METHOD_COUNTERS(mcs); \
309 if (UseLoopCounter) { \
310 bool do_OSR = UseOnStackReplacement; \
311 mcs->backedge_counter()->increment(); \
312 if (ProfileInterpreter) { \
313 BI_PROFILE_GET_OR_CREATE_METHOD_DATA(handle_exception); \
314 /* Check for overflow against MDO count. */ \
315 do_OSR = do_OSR \
316 && (mdo_last_branch_taken_count >= (uint)InvocationCounter::InterpreterBackwardBranchLimit)\
317 /* When ProfileInterpreter is on, the backedge_count comes */ \
318 /* from the methodDataOop, which value does not get reset on */ \
319 /* the call to frequency_counter_overflow(). To avoid */ \
320 /* excessive calls to the overflow routine while the method is */ \
321 /* being compiled, add a second test to make sure the overflow */ \
322 /* function is called only once every overflow_frequency. */ \
323 && (!(mdo_last_branch_taken_count & 1023)); \
324 } else { \
325 /* check for overflow of backedge counter */ \
326 do_OSR = do_OSR \
327 && mcs->invocation_counter()->reached_InvocationLimit(mcs->backedge_counter()); \
328 } \
329 if (do_OSR) { \
330 nmethod* osr_nmethod; \
331 OSR_REQUEST(osr_nmethod, branch_pc); \
332 if (osr_nmethod != NULL && osr_nmethod->osr_entry_bci() != InvalidOSREntryBci) { \
333 intptr_t* buf; \
334 /* Call OSR migration with last java frame only, no checks. */ \
335 CALL_VM_NAKED_LJF(buf=SharedRuntime::OSR_migration_begin(THREAD)); \
336 istate->set_msg(do_osr); \
337 istate->set_osr_buf((address)buf); \
338 istate->set_osr_entry(osr_nmethod->osr_entry()); \
339 return; \
340 } \
341 } \
342 } /* UseCompiler ... */ \
343 SAFEPOINT; \
344 }
346 /*
347 * For those opcodes that need to have a GC point on a backwards branch
348 */
350 /*
351 * Macros for caching and flushing the interpreter state. Some local
352 * variables need to be flushed out to the frame before we do certain
353 * things (like pushing frames or becomming gc safe) and some need to
354 * be recached later (like after popping a frame). We could use one
355 * macro to cache or decache everything, but this would be less then
356 * optimal because we don't always need to cache or decache everything
357 * because some things we know are already cached or decached.
358 */
359 #undef DECACHE_TOS
360 #undef CACHE_TOS
361 #undef CACHE_PREV_TOS
362 #define DECACHE_TOS() istate->set_stack(topOfStack);
364 #define CACHE_TOS() topOfStack = (intptr_t *)istate->stack();
366 #undef DECACHE_PC
367 #undef CACHE_PC
368 #define DECACHE_PC() istate->set_bcp(pc);
369 #define CACHE_PC() pc = istate->bcp();
370 #define CACHE_CP() cp = istate->constants();
371 #define CACHE_LOCALS() locals = istate->locals();
372 #undef CACHE_FRAME
373 #define CACHE_FRAME()
375 // BCI() returns the current bytecode-index.
376 #undef BCI
377 #define BCI() ((int)(intptr_t)(pc - (intptr_t)istate->method()->code_base()))
379 /*
380 * CHECK_NULL - Macro for throwing a NullPointerException if the object
381 * passed is a null ref.
382 * On some architectures/platforms it should be possible to do this implicitly
383 */
384 #undef CHECK_NULL
385 #define CHECK_NULL(obj_) \
386 if ((obj_) == NULL) { \
387 VM_JAVA_ERROR(vmSymbols::java_lang_NullPointerException(), NULL, note_nullCheck_trap); \
388 } \
389 VERIFY_OOP(obj_)
391 #define VMdoubleConstZero() 0.0
392 #define VMdoubleConstOne() 1.0
393 #define VMlongConstZero() (max_jlong-max_jlong)
394 #define VMlongConstOne() ((max_jlong-max_jlong)+1)
396 /*
397 * Alignment
398 */
399 #define VMalignWordUp(val) (((uintptr_t)(val) + 3) & ~3)
401 // Decache the interpreter state that interpreter modifies directly (i.e. GC is indirect mod)
402 #define DECACHE_STATE() DECACHE_PC(); DECACHE_TOS();
404 // Reload interpreter state after calling the VM or a possible GC
405 #define CACHE_STATE() \
406 CACHE_TOS(); \
407 CACHE_PC(); \
408 CACHE_CP(); \
409 CACHE_LOCALS();
411 // Call the VM with last java frame only.
412 #define CALL_VM_NAKED_LJF(func) \
413 DECACHE_STATE(); \
414 SET_LAST_JAVA_FRAME(); \
415 func; \
416 RESET_LAST_JAVA_FRAME(); \
417 CACHE_STATE();
419 // Call the VM. Don't check for pending exceptions.
420 #define CALL_VM_NOCHECK(func) \
421 CALL_VM_NAKED_LJF(func) \
422 if (THREAD->pop_frame_pending() && \
423 !THREAD->pop_frame_in_process()) { \
424 goto handle_Pop_Frame; \
425 } \
426 if (THREAD->jvmti_thread_state() && \
427 THREAD->jvmti_thread_state()->is_earlyret_pending()) { \
428 goto handle_Early_Return; \
429 }
431 // Call the VM and check for pending exceptions
432 #define CALL_VM(func, label) { \
433 CALL_VM_NOCHECK(func); \
434 if (THREAD->has_pending_exception()) goto label; \
435 }
437 /*
438 * BytecodeInterpreter::run(interpreterState istate)
439 * BytecodeInterpreter::runWithChecks(interpreterState istate)
440 *
441 * The real deal. This is where byte codes actually get interpreted.
442 * Basically it's a big while loop that iterates until we return from
443 * the method passed in.
444 *
445 * The runWithChecks is used if JVMTI is enabled.
446 *
447 */
448 #if defined(VM_JVMTI)
449 void
450 BytecodeInterpreter::runWithChecks(interpreterState istate) {
451 #else
452 void
453 BytecodeInterpreter::run(interpreterState istate) {
454 #endif
456 // In order to simplify some tests based on switches set at runtime
457 // we invoke the interpreter a single time after switches are enabled
458 // and set simpler to to test variables rather than method calls or complex
459 // boolean expressions.
461 static int initialized = 0;
462 static int checkit = 0;
463 static intptr_t* c_addr = NULL;
464 static intptr_t c_value;
466 if (checkit && *c_addr != c_value) {
467 os::breakpoint();
468 }
469 #ifdef VM_JVMTI
470 static bool _jvmti_interp_events = 0;
471 #endif
473 static int _compiling; // (UseCompiler || CountCompiledCalls)
475 #ifdef ASSERT
476 if (istate->_msg != initialize) {
477 // We have a problem here if we are running with a pre-hsx24 JDK (for example during bootstrap)
478 // because in that case, EnableInvokeDynamic is true by default but will be later switched off
479 // if java_lang_invoke_MethodHandle::compute_offsets() detects that the JDK only has the classes
480 // for the old JSR292 implementation.
481 // This leads to a situation where 'istate->_stack_limit' always accounts for
482 // methodOopDesc::extra_stack_entries() because it is computed in
483 // CppInterpreterGenerator::generate_compute_interpreter_state() which was generated while
484 // EnableInvokeDynamic was still true. On the other hand, istate->_method->max_stack() doesn't
485 // account for extra_stack_entries() anymore because at the time when it is called
486 // EnableInvokeDynamic was already set to false.
487 // So we have a second version of the assertion which handles the case where EnableInvokeDynamic was
488 // switched off because of the wrong classes.
489 if (EnableInvokeDynamic || FLAG_IS_CMDLINE(EnableInvokeDynamic)) {
490 assert(labs(istate->_stack_base - istate->_stack_limit) == (istate->_method->max_stack() + 1), "bad stack limit");
491 } else {
492 const int extra_stack_entries = Method::extra_stack_entries_for_jsr292;
493 assert(labs(istate->_stack_base - istate->_stack_limit) == (istate->_method->max_stack() + extra_stack_entries
494 + 1), "bad stack limit");
495 }
496 #ifndef SHARK
497 IA32_ONLY(assert(istate->_stack_limit == istate->_thread->last_Java_sp() + 1, "wrong"));
498 #endif // !SHARK
499 }
500 // Verify linkages.
501 interpreterState l = istate;
502 do {
503 assert(l == l->_self_link, "bad link");
504 l = l->_prev_link;
505 } while (l != NULL);
506 // Screwups with stack management usually cause us to overwrite istate
507 // save a copy so we can verify it.
508 interpreterState orig = istate;
509 #endif
511 register intptr_t* topOfStack = (intptr_t *)istate->stack(); /* access with STACK macros */
512 register address pc = istate->bcp();
513 register jubyte opcode;
514 register intptr_t* locals = istate->locals();
515 register ConstantPoolCache* cp = istate->constants(); // method()->constants()->cache()
516 #ifdef LOTS_OF_REGS
517 register JavaThread* THREAD = istate->thread();
518 #else
519 #undef THREAD
520 #define THREAD istate->thread()
521 #endif
523 #ifdef USELABELS
524 const static void* const opclabels_data[256] = {
525 /* 0x00 */ &&opc_nop, &&opc_aconst_null,&&opc_iconst_m1,&&opc_iconst_0,
526 /* 0x04 */ &&opc_iconst_1,&&opc_iconst_2, &&opc_iconst_3, &&opc_iconst_4,
527 /* 0x08 */ &&opc_iconst_5,&&opc_lconst_0, &&opc_lconst_1, &&opc_fconst_0,
528 /* 0x0C */ &&opc_fconst_1,&&opc_fconst_2, &&opc_dconst_0, &&opc_dconst_1,
530 /* 0x10 */ &&opc_bipush, &&opc_sipush, &&opc_ldc, &&opc_ldc_w,
531 /* 0x14 */ &&opc_ldc2_w, &&opc_iload, &&opc_lload, &&opc_fload,
532 /* 0x18 */ &&opc_dload, &&opc_aload, &&opc_iload_0,&&opc_iload_1,
533 /* 0x1C */ &&opc_iload_2,&&opc_iload_3,&&opc_lload_0,&&opc_lload_1,
535 /* 0x20 */ &&opc_lload_2,&&opc_lload_3,&&opc_fload_0,&&opc_fload_1,
536 /* 0x24 */ &&opc_fload_2,&&opc_fload_3,&&opc_dload_0,&&opc_dload_1,
537 /* 0x28 */ &&opc_dload_2,&&opc_dload_3,&&opc_aload_0,&&opc_aload_1,
538 /* 0x2C */ &&opc_aload_2,&&opc_aload_3,&&opc_iaload, &&opc_laload,
540 /* 0x30 */ &&opc_faload, &&opc_daload, &&opc_aaload, &&opc_baload,
541 /* 0x34 */ &&opc_caload, &&opc_saload, &&opc_istore, &&opc_lstore,
542 /* 0x38 */ &&opc_fstore, &&opc_dstore, &&opc_astore, &&opc_istore_0,
543 /* 0x3C */ &&opc_istore_1,&&opc_istore_2,&&opc_istore_3,&&opc_lstore_0,
545 /* 0x40 */ &&opc_lstore_1,&&opc_lstore_2,&&opc_lstore_3,&&opc_fstore_0,
546 /* 0x44 */ &&opc_fstore_1,&&opc_fstore_2,&&opc_fstore_3,&&opc_dstore_0,
547 /* 0x48 */ &&opc_dstore_1,&&opc_dstore_2,&&opc_dstore_3,&&opc_astore_0,
548 /* 0x4C */ &&opc_astore_1,&&opc_astore_2,&&opc_astore_3,&&opc_iastore,
550 /* 0x50 */ &&opc_lastore,&&opc_fastore,&&opc_dastore,&&opc_aastore,
551 /* 0x54 */ &&opc_bastore,&&opc_castore,&&opc_sastore,&&opc_pop,
552 /* 0x58 */ &&opc_pop2, &&opc_dup, &&opc_dup_x1, &&opc_dup_x2,
553 /* 0x5C */ &&opc_dup2, &&opc_dup2_x1,&&opc_dup2_x2,&&opc_swap,
555 /* 0x60 */ &&opc_iadd,&&opc_ladd,&&opc_fadd,&&opc_dadd,
556 /* 0x64 */ &&opc_isub,&&opc_lsub,&&opc_fsub,&&opc_dsub,
557 /* 0x68 */ &&opc_imul,&&opc_lmul,&&opc_fmul,&&opc_dmul,
558 /* 0x6C */ &&opc_idiv,&&opc_ldiv,&&opc_fdiv,&&opc_ddiv,
560 /* 0x70 */ &&opc_irem, &&opc_lrem, &&opc_frem,&&opc_drem,
561 /* 0x74 */ &&opc_ineg, &&opc_lneg, &&opc_fneg,&&opc_dneg,
562 /* 0x78 */ &&opc_ishl, &&opc_lshl, &&opc_ishr,&&opc_lshr,
563 /* 0x7C */ &&opc_iushr,&&opc_lushr,&&opc_iand,&&opc_land,
565 /* 0x80 */ &&opc_ior, &&opc_lor,&&opc_ixor,&&opc_lxor,
566 /* 0x84 */ &&opc_iinc,&&opc_i2l,&&opc_i2f, &&opc_i2d,
567 /* 0x88 */ &&opc_l2i, &&opc_l2f,&&opc_l2d, &&opc_f2i,
568 /* 0x8C */ &&opc_f2l, &&opc_f2d,&&opc_d2i, &&opc_d2l,
570 /* 0x90 */ &&opc_d2f, &&opc_i2b, &&opc_i2c, &&opc_i2s,
571 /* 0x94 */ &&opc_lcmp, &&opc_fcmpl,&&opc_fcmpg,&&opc_dcmpl,
572 /* 0x98 */ &&opc_dcmpg,&&opc_ifeq, &&opc_ifne, &&opc_iflt,
573 /* 0x9C */ &&opc_ifge, &&opc_ifgt, &&opc_ifle, &&opc_if_icmpeq,
575 /* 0xA0 */ &&opc_if_icmpne,&&opc_if_icmplt,&&opc_if_icmpge, &&opc_if_icmpgt,
576 /* 0xA4 */ &&opc_if_icmple,&&opc_if_acmpeq,&&opc_if_acmpne, &&opc_goto,
577 /* 0xA8 */ &&opc_jsr, &&opc_ret, &&opc_tableswitch,&&opc_lookupswitch,
578 /* 0xAC */ &&opc_ireturn, &&opc_lreturn, &&opc_freturn, &&opc_dreturn,
580 /* 0xB0 */ &&opc_areturn, &&opc_return, &&opc_getstatic, &&opc_putstatic,
581 /* 0xB4 */ &&opc_getfield, &&opc_putfield, &&opc_invokevirtual,&&opc_invokespecial,
582 /* 0xB8 */ &&opc_invokestatic,&&opc_invokeinterface,&&opc_invokedynamic,&&opc_new,
583 /* 0xBC */ &&opc_newarray, &&opc_anewarray, &&opc_arraylength, &&opc_athrow,
585 /* 0xC0 */ &&opc_checkcast, &&opc_instanceof, &&opc_monitorenter, &&opc_monitorexit,
586 /* 0xC4 */ &&opc_wide, &&opc_multianewarray, &&opc_ifnull, &&opc_ifnonnull,
587 /* 0xC8 */ &&opc_goto_w, &&opc_jsr_w, &&opc_breakpoint, &&opc_default,
588 /* 0xCC */ &&opc_default, &&opc_default, &&opc_default, &&opc_default,
590 /* 0xD0 */ &&opc_default, &&opc_default, &&opc_default, &&opc_default,
591 /* 0xD4 */ &&opc_default, &&opc_default, &&opc_default, &&opc_default,
592 /* 0xD8 */ &&opc_default, &&opc_default, &&opc_default, &&opc_default,
593 /* 0xDC */ &&opc_default, &&opc_default, &&opc_default, &&opc_default,
595 /* 0xE0 */ &&opc_default, &&opc_default, &&opc_default, &&opc_default,
596 /* 0xE4 */ &&opc_default, &&opc_default, &&opc_fast_aldc, &&opc_fast_aldc_w,
597 /* 0xE8 */ &&opc_return_register_finalizer,
598 &&opc_invokehandle, &&opc_default, &&opc_default,
599 /* 0xEC */ &&opc_default, &&opc_default, &&opc_default, &&opc_default,
601 /* 0xF0 */ &&opc_default, &&opc_default, &&opc_default, &&opc_default,
602 /* 0xF4 */ &&opc_default, &&opc_default, &&opc_default, &&opc_default,
603 /* 0xF8 */ &&opc_default, &&opc_default, &&opc_default, &&opc_default,
604 /* 0xFC */ &&opc_default, &&opc_default, &&opc_default, &&opc_default
605 };
606 register uintptr_t *dispatch_table = (uintptr_t*)&opclabels_data[0];
607 #endif /* USELABELS */
609 #ifdef ASSERT
610 // this will trigger a VERIFY_OOP on entry
611 if (istate->msg() != initialize && ! METHOD->is_static()) {
612 oop rcvr = LOCALS_OBJECT(0);
613 VERIFY_OOP(rcvr);
614 }
615 #endif
616 // #define HACK
617 #ifdef HACK
618 bool interesting = false;
619 #endif // HACK
621 /* QQQ this should be a stack method so we don't know actual direction */
622 guarantee(istate->msg() == initialize ||
623 topOfStack >= istate->stack_limit() &&
624 topOfStack < istate->stack_base(),
625 "Stack top out of range");
627 #ifdef CC_INTERP_PROFILE
628 // MethodData's last branch taken count.
629 uint mdo_last_branch_taken_count = 0;
630 #else
631 const uint mdo_last_branch_taken_count = 0;
632 #endif
634 switch (istate->msg()) {
635 case initialize: {
636 if (initialized++) ShouldNotReachHere(); // Only one initialize call.
637 _compiling = (UseCompiler || CountCompiledCalls);
638 #ifdef VM_JVMTI
639 _jvmti_interp_events = JvmtiExport::can_post_interpreter_events();
640 #endif
641 return;
642 }
643 break;
644 case method_entry: {
645 THREAD->set_do_not_unlock();
646 // count invocations
647 assert(initialized, "Interpreter not initialized");
648 if (_compiling) {
649 MethodCounters* mcs;
650 GET_METHOD_COUNTERS(mcs);
651 if (ProfileInterpreter) {
652 METHOD->increment_interpreter_invocation_count(THREAD);
653 }
654 mcs->invocation_counter()->increment();
655 if (mcs->invocation_counter()->reached_InvocationLimit(mcs->backedge_counter())) {
656 CALL_VM((void)InterpreterRuntime::frequency_counter_overflow(THREAD, NULL), handle_exception);
657 // We no longer retry on a counter overflow.
658 }
659 // Get or create profile data. Check for pending (async) exceptions.
660 BI_PROFILE_GET_OR_CREATE_METHOD_DATA(handle_exception);
661 SAFEPOINT;
662 }
664 if ((istate->_stack_base - istate->_stack_limit) != istate->method()->max_stack() + 1) {
665 // initialize
666 os::breakpoint();
667 }
669 #ifdef HACK
670 {
671 ResourceMark rm;
672 char *method_name = istate->method()->name_and_sig_as_C_string();
673 if (strstr(method_name, "runThese$TestRunner.run()V") != NULL) {
674 tty->print_cr("entering: depth %d bci: %d",
675 (istate->_stack_base - istate->_stack),
676 istate->_bcp - istate->_method->code_base());
677 interesting = true;
678 }
679 }
680 #endif // HACK
682 // Lock method if synchronized.
683 if (METHOD->is_synchronized()) {
684 // oop rcvr = locals[0].j.r;
685 oop rcvr;
686 if (METHOD->is_static()) {
687 rcvr = METHOD->constants()->pool_holder()->java_mirror();
688 } else {
689 rcvr = LOCALS_OBJECT(0);
690 VERIFY_OOP(rcvr);
691 }
692 // The initial monitor is ours for the taking.
693 // Monitor not filled in frame manager any longer as this caused race condition with biased locking.
694 BasicObjectLock* mon = &istate->monitor_base()[-1];
695 mon->set_obj(rcvr);
696 bool success = false;
697 uintptr_t epoch_mask_in_place = (uintptr_t)markOopDesc::epoch_mask_in_place;
698 markOop mark = rcvr->mark();
699 intptr_t hash = (intptr_t) markOopDesc::no_hash;
700 // Implies UseBiasedLocking.
701 if (mark->has_bias_pattern()) {
702 uintptr_t thread_ident;
703 uintptr_t anticipated_bias_locking_value;
704 thread_ident = (uintptr_t)istate->thread();
705 anticipated_bias_locking_value =
706 (((uintptr_t)rcvr->klass()->prototype_header() | thread_ident) ^ (uintptr_t)mark) &
707 ~((uintptr_t) markOopDesc::age_mask_in_place);
709 if (anticipated_bias_locking_value == 0) {
710 // Already biased towards this thread, nothing to do.
711 if (PrintBiasedLockingStatistics) {
712 (* BiasedLocking::biased_lock_entry_count_addr())++;
713 }
714 success = true;
715 } else if ((anticipated_bias_locking_value & markOopDesc::biased_lock_mask_in_place) != 0) {
716 // Try to revoke bias.
717 markOop header = rcvr->klass()->prototype_header();
718 if (hash != markOopDesc::no_hash) {
719 header = header->copy_set_hash(hash);
720 }
721 if (Atomic::cmpxchg_ptr(header, rcvr->mark_addr(), mark) == mark) {
722 if (PrintBiasedLockingStatistics)
723 (*BiasedLocking::revoked_lock_entry_count_addr())++;
724 }
725 } else if ((anticipated_bias_locking_value & epoch_mask_in_place) != 0) {
726 // Try to rebias.
727 markOop new_header = (markOop) ( (intptr_t) rcvr->klass()->prototype_header() | thread_ident);
728 if (hash != markOopDesc::no_hash) {
729 new_header = new_header->copy_set_hash(hash);
730 }
731 if (Atomic::cmpxchg_ptr((void*)new_header, rcvr->mark_addr(), mark) == mark) {
732 if (PrintBiasedLockingStatistics) {
733 (* BiasedLocking::rebiased_lock_entry_count_addr())++;
734 }
735 } else {
736 CALL_VM(InterpreterRuntime::monitorenter(THREAD, mon), handle_exception);
737 }
738 success = true;
739 } else {
740 // Try to bias towards thread in case object is anonymously biased.
741 markOop header = (markOop) ((uintptr_t) mark &
742 ((uintptr_t)markOopDesc::biased_lock_mask_in_place |
743 (uintptr_t)markOopDesc::age_mask_in_place | epoch_mask_in_place));
744 if (hash != markOopDesc::no_hash) {
745 header = header->copy_set_hash(hash);
746 }
747 markOop new_header = (markOop) ((uintptr_t) header | thread_ident);
748 // Debugging hint.
749 DEBUG_ONLY(mon->lock()->set_displaced_header((markOop) (uintptr_t) 0xdeaddead);)
750 if (Atomic::cmpxchg_ptr((void*)new_header, rcvr->mark_addr(), header) == header) {
751 if (PrintBiasedLockingStatistics) {
752 (* BiasedLocking::anonymously_biased_lock_entry_count_addr())++;
753 }
754 } else {
755 CALL_VM(InterpreterRuntime::monitorenter(THREAD, mon), handle_exception);
756 }
757 success = true;
758 }
759 }
761 // Traditional lightweight locking.
762 if (!success) {
763 markOop displaced = rcvr->mark()->set_unlocked();
764 mon->lock()->set_displaced_header(displaced);
765 bool call_vm = UseHeavyMonitors;
766 if (call_vm || Atomic::cmpxchg_ptr(mon, rcvr->mark_addr(), displaced) != displaced) {
767 // Is it simple recursive case?
768 if (!call_vm && THREAD->is_lock_owned((address) displaced->clear_lock_bits())) {
769 mon->lock()->set_displaced_header(NULL);
770 } else {
771 CALL_VM(InterpreterRuntime::monitorenter(THREAD, mon), handle_exception);
772 }
773 }
774 }
775 }
776 THREAD->clr_do_not_unlock();
778 // Notify jvmti
779 #ifdef VM_JVMTI
780 if (_jvmti_interp_events) {
781 // Whenever JVMTI puts a thread in interp_only_mode, method
782 // entry/exit events are sent for that thread to track stack depth.
783 if (THREAD->is_interp_only_mode()) {
784 CALL_VM(InterpreterRuntime::post_method_entry(THREAD),
785 handle_exception);
786 }
787 }
788 #endif /* VM_JVMTI */
790 goto run;
791 }
793 case popping_frame: {
794 // returned from a java call to pop the frame, restart the call
795 // clear the message so we don't confuse ourselves later
796 assert(THREAD->pop_frame_in_process(), "wrong frame pop state");
797 istate->set_msg(no_request);
798 if (_compiling) {
799 // Set MDX back to the ProfileData of the invoke bytecode that will be
800 // restarted.
801 SET_MDX(NULL);
802 BI_PROFILE_GET_OR_CREATE_METHOD_DATA(handle_exception);
803 }
804 THREAD->clr_pop_frame_in_process();
805 goto run;
806 }
808 case method_resume: {
809 if ((istate->_stack_base - istate->_stack_limit) != istate->method()->max_stack() + 1) {
810 // resume
811 os::breakpoint();
812 }
813 #ifdef HACK
814 {
815 ResourceMark rm;
816 char *method_name = istate->method()->name_and_sig_as_C_string();
817 if (strstr(method_name, "runThese$TestRunner.run()V") != NULL) {
818 tty->print_cr("resume: depth %d bci: %d",
819 (istate->_stack_base - istate->_stack) ,
820 istate->_bcp - istate->_method->code_base());
821 interesting = true;
822 }
823 }
824 #endif // HACK
825 // returned from a java call, continue executing.
826 if (THREAD->pop_frame_pending() && !THREAD->pop_frame_in_process()) {
827 goto handle_Pop_Frame;
828 }
829 if (THREAD->jvmti_thread_state() &&
830 THREAD->jvmti_thread_state()->is_earlyret_pending()) {
831 goto handle_Early_Return;
832 }
834 if (THREAD->has_pending_exception()) goto handle_exception;
835 // Update the pc by the saved amount of the invoke bytecode size
836 UPDATE_PC(istate->bcp_advance());
838 if (_compiling) {
839 // Get or create profile data. Check for pending (async) exceptions.
840 BI_PROFILE_GET_OR_CREATE_METHOD_DATA(handle_exception);
841 }
842 goto run;
843 }
845 case deopt_resume2: {
846 // Returned from an opcode that will reexecute. Deopt was
847 // a result of a PopFrame request.
848 //
850 if (_compiling) {
851 // Get or create profile data. Check for pending (async) exceptions.
852 BI_PROFILE_GET_OR_CREATE_METHOD_DATA(handle_exception);
853 }
854 goto run;
855 }
857 case deopt_resume: {
858 // Returned from an opcode that has completed. The stack has
859 // the result all we need to do is skip across the bytecode
860 // and continue (assuming there is no exception pending)
861 //
862 // compute continuation length
863 //
864 // Note: it is possible to deopt at a return_register_finalizer opcode
865 // because this requires entering the vm to do the registering. While the
866 // opcode is complete we can't advance because there are no more opcodes
867 // much like trying to deopt at a poll return. In that has we simply
868 // get out of here
869 //
870 if ( Bytecodes::code_at(METHOD, pc) == Bytecodes::_return_register_finalizer) {
871 // this will do the right thing even if an exception is pending.
872 goto handle_return;
873 }
874 UPDATE_PC(Bytecodes::length_at(METHOD, pc));
875 if (THREAD->has_pending_exception()) goto handle_exception;
877 if (_compiling) {
878 // Get or create profile data. Check for pending (async) exceptions.
879 BI_PROFILE_GET_OR_CREATE_METHOD_DATA(handle_exception);
880 }
881 goto run;
882 }
883 case got_monitors: {
884 // continue locking now that we have a monitor to use
885 // we expect to find newly allocated monitor at the "top" of the monitor stack.
886 oop lockee = STACK_OBJECT(-1);
887 VERIFY_OOP(lockee);
888 // derefing's lockee ought to provoke implicit null check
889 // find a free monitor
890 BasicObjectLock* entry = (BasicObjectLock*) istate->stack_base();
891 assert(entry->obj() == NULL, "Frame manager didn't allocate the monitor");
892 entry->set_obj(lockee);
893 bool success = false;
894 uintptr_t epoch_mask_in_place = (uintptr_t)markOopDesc::epoch_mask_in_place;
896 markOop mark = lockee->mark();
897 intptr_t hash = (intptr_t) markOopDesc::no_hash;
898 // implies UseBiasedLocking
899 if (mark->has_bias_pattern()) {
900 uintptr_t thread_ident;
901 uintptr_t anticipated_bias_locking_value;
902 thread_ident = (uintptr_t)istate->thread();
903 anticipated_bias_locking_value =
904 (((uintptr_t)lockee->klass()->prototype_header() | thread_ident) ^ (uintptr_t)mark) &
905 ~((uintptr_t) markOopDesc::age_mask_in_place);
907 if (anticipated_bias_locking_value == 0) {
908 // already biased towards this thread, nothing to do
909 if (PrintBiasedLockingStatistics) {
910 (* BiasedLocking::biased_lock_entry_count_addr())++;
911 }
912 success = true;
913 } else if ((anticipated_bias_locking_value & markOopDesc::biased_lock_mask_in_place) != 0) {
914 // try revoke bias
915 markOop header = lockee->klass()->prototype_header();
916 if (hash != markOopDesc::no_hash) {
917 header = header->copy_set_hash(hash);
918 }
919 if (Atomic::cmpxchg_ptr(header, lockee->mark_addr(), mark) == mark) {
920 if (PrintBiasedLockingStatistics) {
921 (*BiasedLocking::revoked_lock_entry_count_addr())++;
922 }
923 }
924 } else if ((anticipated_bias_locking_value & epoch_mask_in_place) !=0) {
925 // try rebias
926 markOop new_header = (markOop) ( (intptr_t) lockee->klass()->prototype_header() | thread_ident);
927 if (hash != markOopDesc::no_hash) {
928 new_header = new_header->copy_set_hash(hash);
929 }
930 if (Atomic::cmpxchg_ptr((void*)new_header, lockee->mark_addr(), mark) == mark) {
931 if (PrintBiasedLockingStatistics) {
932 (* BiasedLocking::rebiased_lock_entry_count_addr())++;
933 }
934 } else {
935 CALL_VM(InterpreterRuntime::monitorenter(THREAD, entry), handle_exception);
936 }
937 success = true;
938 } else {
939 // try to bias towards thread in case object is anonymously biased
940 markOop header = (markOop) ((uintptr_t) mark & ((uintptr_t)markOopDesc::biased_lock_mask_in_place |
941 (uintptr_t)markOopDesc::age_mask_in_place | epoch_mask_in_place));
942 if (hash != markOopDesc::no_hash) {
943 header = header->copy_set_hash(hash);
944 }
945 markOop new_header = (markOop) ((uintptr_t) header | thread_ident);
946 // debugging hint
947 DEBUG_ONLY(entry->lock()->set_displaced_header((markOop) (uintptr_t) 0xdeaddead);)
948 if (Atomic::cmpxchg_ptr((void*)new_header, lockee->mark_addr(), header) == header) {
949 if (PrintBiasedLockingStatistics) {
950 (* BiasedLocking::anonymously_biased_lock_entry_count_addr())++;
951 }
952 } else {
953 CALL_VM(InterpreterRuntime::monitorenter(THREAD, entry), handle_exception);
954 }
955 success = true;
956 }
957 }
959 // traditional lightweight locking
960 if (!success) {
961 markOop displaced = lockee->mark()->set_unlocked();
962 entry->lock()->set_displaced_header(displaced);
963 bool call_vm = UseHeavyMonitors;
964 if (call_vm || Atomic::cmpxchg_ptr(entry, lockee->mark_addr(), displaced) != displaced) {
965 // Is it simple recursive case?
966 if (!call_vm && THREAD->is_lock_owned((address) displaced->clear_lock_bits())) {
967 entry->lock()->set_displaced_header(NULL);
968 } else {
969 CALL_VM(InterpreterRuntime::monitorenter(THREAD, entry), handle_exception);
970 }
971 }
972 }
973 UPDATE_PC_AND_TOS(1, -1);
974 goto run;
975 }
976 default: {
977 fatal("Unexpected message from frame manager");
978 }
979 }
981 run:
983 DO_UPDATE_INSTRUCTION_COUNT(*pc)
984 DEBUGGER_SINGLE_STEP_NOTIFY();
985 #ifdef PREFETCH_OPCCODE
986 opcode = *pc; /* prefetch first opcode */
987 #endif
989 #ifndef USELABELS
990 while (1)
991 #endif
992 {
993 #ifndef PREFETCH_OPCCODE
994 opcode = *pc;
995 #endif
996 // Seems like this happens twice per opcode. At worst this is only
997 // need at entry to the loop.
998 // DEBUGGER_SINGLE_STEP_NOTIFY();
999 /* Using this labels avoids double breakpoints when quickening and
1000 * when returing from transition frames.
1001 */
1002 opcode_switch:
1003 assert(istate == orig, "Corrupted istate");
1004 /* QQQ Hmm this has knowledge of direction, ought to be a stack method */
1005 assert(topOfStack >= istate->stack_limit(), "Stack overrun");
1006 assert(topOfStack < istate->stack_base(), "Stack underrun");
1008 #ifdef USELABELS
1009 DISPATCH(opcode);
1010 #else
1011 switch (opcode)
1012 #endif
1013 {
1014 CASE(_nop):
1015 UPDATE_PC_AND_CONTINUE(1);
1017 /* Push miscellaneous constants onto the stack. */
1019 CASE(_aconst_null):
1020 SET_STACK_OBJECT(NULL, 0);
1021 UPDATE_PC_AND_TOS_AND_CONTINUE(1, 1);
1023 #undef OPC_CONST_n
1024 #define OPC_CONST_n(opcode, const_type, value) \
1025 CASE(opcode): \
1026 SET_STACK_ ## const_type(value, 0); \
1027 UPDATE_PC_AND_TOS_AND_CONTINUE(1, 1);
1029 OPC_CONST_n(_iconst_m1, INT, -1);
1030 OPC_CONST_n(_iconst_0, INT, 0);
1031 OPC_CONST_n(_iconst_1, INT, 1);
1032 OPC_CONST_n(_iconst_2, INT, 2);
1033 OPC_CONST_n(_iconst_3, INT, 3);
1034 OPC_CONST_n(_iconst_4, INT, 4);
1035 OPC_CONST_n(_iconst_5, INT, 5);
1036 OPC_CONST_n(_fconst_0, FLOAT, 0.0);
1037 OPC_CONST_n(_fconst_1, FLOAT, 1.0);
1038 OPC_CONST_n(_fconst_2, FLOAT, 2.0);
1040 #undef OPC_CONST2_n
1041 #define OPC_CONST2_n(opcname, value, key, kind) \
1042 CASE(_##opcname): \
1043 { \
1044 SET_STACK_ ## kind(VM##key##Const##value(), 1); \
1045 UPDATE_PC_AND_TOS_AND_CONTINUE(1, 2); \
1046 }
1047 OPC_CONST2_n(dconst_0, Zero, double, DOUBLE);
1048 OPC_CONST2_n(dconst_1, One, double, DOUBLE);
1049 OPC_CONST2_n(lconst_0, Zero, long, LONG);
1050 OPC_CONST2_n(lconst_1, One, long, LONG);
1052 /* Load constant from constant pool: */
1054 /* Push a 1-byte signed integer value onto the stack. */
1055 CASE(_bipush):
1056 SET_STACK_INT((jbyte)(pc[1]), 0);
1057 UPDATE_PC_AND_TOS_AND_CONTINUE(2, 1);
1059 /* Push a 2-byte signed integer constant onto the stack. */
1060 CASE(_sipush):
1061 SET_STACK_INT((int16_t)Bytes::get_Java_u2(pc + 1), 0);
1062 UPDATE_PC_AND_TOS_AND_CONTINUE(3, 1);
1064 /* load from local variable */
1066 CASE(_aload):
1067 VERIFY_OOP(LOCALS_OBJECT(pc[1]));
1068 SET_STACK_OBJECT(LOCALS_OBJECT(pc[1]), 0);
1069 UPDATE_PC_AND_TOS_AND_CONTINUE(2, 1);
1071 CASE(_iload):
1072 CASE(_fload):
1073 SET_STACK_SLOT(LOCALS_SLOT(pc[1]), 0);
1074 UPDATE_PC_AND_TOS_AND_CONTINUE(2, 1);
1076 CASE(_lload):
1077 SET_STACK_LONG_FROM_ADDR(LOCALS_LONG_AT(pc[1]), 1);
1078 UPDATE_PC_AND_TOS_AND_CONTINUE(2, 2);
1080 CASE(_dload):
1081 SET_STACK_DOUBLE_FROM_ADDR(LOCALS_DOUBLE_AT(pc[1]), 1);
1082 UPDATE_PC_AND_TOS_AND_CONTINUE(2, 2);
1084 #undef OPC_LOAD_n
1085 #define OPC_LOAD_n(num) \
1086 CASE(_aload_##num): \
1087 VERIFY_OOP(LOCALS_OBJECT(num)); \
1088 SET_STACK_OBJECT(LOCALS_OBJECT(num), 0); \
1089 UPDATE_PC_AND_TOS_AND_CONTINUE(1, 1); \
1090 \
1091 CASE(_iload_##num): \
1092 CASE(_fload_##num): \
1093 SET_STACK_SLOT(LOCALS_SLOT(num), 0); \
1094 UPDATE_PC_AND_TOS_AND_CONTINUE(1, 1); \
1095 \
1096 CASE(_lload_##num): \
1097 SET_STACK_LONG_FROM_ADDR(LOCALS_LONG_AT(num), 1); \
1098 UPDATE_PC_AND_TOS_AND_CONTINUE(1, 2); \
1099 CASE(_dload_##num): \
1100 SET_STACK_DOUBLE_FROM_ADDR(LOCALS_DOUBLE_AT(num), 1); \
1101 UPDATE_PC_AND_TOS_AND_CONTINUE(1, 2);
1103 OPC_LOAD_n(0);
1104 OPC_LOAD_n(1);
1105 OPC_LOAD_n(2);
1106 OPC_LOAD_n(3);
1108 /* store to a local variable */
1110 CASE(_astore):
1111 astore(topOfStack, -1, locals, pc[1]);
1112 UPDATE_PC_AND_TOS_AND_CONTINUE(2, -1);
1114 CASE(_istore):
1115 CASE(_fstore):
1116 SET_LOCALS_SLOT(STACK_SLOT(-1), pc[1]);
1117 UPDATE_PC_AND_TOS_AND_CONTINUE(2, -1);
1119 CASE(_lstore):
1120 SET_LOCALS_LONG(STACK_LONG(-1), pc[1]);
1121 UPDATE_PC_AND_TOS_AND_CONTINUE(2, -2);
1123 CASE(_dstore):
1124 SET_LOCALS_DOUBLE(STACK_DOUBLE(-1), pc[1]);
1125 UPDATE_PC_AND_TOS_AND_CONTINUE(2, -2);
1127 CASE(_wide): {
1128 uint16_t reg = Bytes::get_Java_u2(pc + 2);
1130 opcode = pc[1];
1132 // Wide and it's sub-bytecode are counted as separate instructions. If we
1133 // don't account for this here, the bytecode trace skips the next bytecode.
1134 DO_UPDATE_INSTRUCTION_COUNT(opcode);
1136 switch(opcode) {
1137 case Bytecodes::_aload:
1138 VERIFY_OOP(LOCALS_OBJECT(reg));
1139 SET_STACK_OBJECT(LOCALS_OBJECT(reg), 0);
1140 UPDATE_PC_AND_TOS_AND_CONTINUE(4, 1);
1142 case Bytecodes::_iload:
1143 case Bytecodes::_fload:
1144 SET_STACK_SLOT(LOCALS_SLOT(reg), 0);
1145 UPDATE_PC_AND_TOS_AND_CONTINUE(4, 1);
1147 case Bytecodes::_lload:
1148 SET_STACK_LONG_FROM_ADDR(LOCALS_LONG_AT(reg), 1);
1149 UPDATE_PC_AND_TOS_AND_CONTINUE(4, 2);
1151 case Bytecodes::_dload:
1152 SET_STACK_DOUBLE_FROM_ADDR(LOCALS_LONG_AT(reg), 1);
1153 UPDATE_PC_AND_TOS_AND_CONTINUE(4, 2);
1155 case Bytecodes::_astore:
1156 astore(topOfStack, -1, locals, reg);
1157 UPDATE_PC_AND_TOS_AND_CONTINUE(4, -1);
1159 case Bytecodes::_istore:
1160 case Bytecodes::_fstore:
1161 SET_LOCALS_SLOT(STACK_SLOT(-1), reg);
1162 UPDATE_PC_AND_TOS_AND_CONTINUE(4, -1);
1164 case Bytecodes::_lstore:
1165 SET_LOCALS_LONG(STACK_LONG(-1), reg);
1166 UPDATE_PC_AND_TOS_AND_CONTINUE(4, -2);
1168 case Bytecodes::_dstore:
1169 SET_LOCALS_DOUBLE(STACK_DOUBLE(-1), reg);
1170 UPDATE_PC_AND_TOS_AND_CONTINUE(4, -2);
1172 case Bytecodes::_iinc: {
1173 int16_t offset = (int16_t)Bytes::get_Java_u2(pc+4);
1174 // Be nice to see what this generates.... QQQ
1175 SET_LOCALS_INT(LOCALS_INT(reg) + offset, reg);
1176 UPDATE_PC_AND_CONTINUE(6);
1177 }
1178 case Bytecodes::_ret:
1179 // Profile ret.
1180 BI_PROFILE_UPDATE_RET(/*bci=*/((int)(intptr_t)(LOCALS_ADDR(reg))));
1181 // Now, update the pc.
1182 pc = istate->method()->code_base() + (intptr_t)(LOCALS_ADDR(reg));
1183 UPDATE_PC_AND_CONTINUE(0);
1184 default:
1185 VM_JAVA_ERROR(vmSymbols::java_lang_InternalError(), "undefined opcode", note_no_trap);
1186 }
1187 }
1190 #undef OPC_STORE_n
1191 #define OPC_STORE_n(num) \
1192 CASE(_astore_##num): \
1193 astore(topOfStack, -1, locals, num); \
1194 UPDATE_PC_AND_TOS_AND_CONTINUE(1, -1); \
1195 CASE(_istore_##num): \
1196 CASE(_fstore_##num): \
1197 SET_LOCALS_SLOT(STACK_SLOT(-1), num); \
1198 UPDATE_PC_AND_TOS_AND_CONTINUE(1, -1);
1200 OPC_STORE_n(0);
1201 OPC_STORE_n(1);
1202 OPC_STORE_n(2);
1203 OPC_STORE_n(3);
1205 #undef OPC_DSTORE_n
1206 #define OPC_DSTORE_n(num) \
1207 CASE(_dstore_##num): \
1208 SET_LOCALS_DOUBLE(STACK_DOUBLE(-1), num); \
1209 UPDATE_PC_AND_TOS_AND_CONTINUE(1, -2); \
1210 CASE(_lstore_##num): \
1211 SET_LOCALS_LONG(STACK_LONG(-1), num); \
1212 UPDATE_PC_AND_TOS_AND_CONTINUE(1, -2);
1214 OPC_DSTORE_n(0);
1215 OPC_DSTORE_n(1);
1216 OPC_DSTORE_n(2);
1217 OPC_DSTORE_n(3);
1219 /* stack pop, dup, and insert opcodes */
1222 CASE(_pop): /* Discard the top item on the stack */
1223 UPDATE_PC_AND_TOS_AND_CONTINUE(1, -1);
1226 CASE(_pop2): /* Discard the top 2 items on the stack */
1227 UPDATE_PC_AND_TOS_AND_CONTINUE(1, -2);
1230 CASE(_dup): /* Duplicate the top item on the stack */
1231 dup(topOfStack);
1232 UPDATE_PC_AND_TOS_AND_CONTINUE(1, 1);
1234 CASE(_dup2): /* Duplicate the top 2 items on the stack */
1235 dup2(topOfStack);
1236 UPDATE_PC_AND_TOS_AND_CONTINUE(1, 2);
1238 CASE(_dup_x1): /* insert top word two down */
1239 dup_x1(topOfStack);
1240 UPDATE_PC_AND_TOS_AND_CONTINUE(1, 1);
1242 CASE(_dup_x2): /* insert top word three down */
1243 dup_x2(topOfStack);
1244 UPDATE_PC_AND_TOS_AND_CONTINUE(1, 1);
1246 CASE(_dup2_x1): /* insert top 2 slots three down */
1247 dup2_x1(topOfStack);
1248 UPDATE_PC_AND_TOS_AND_CONTINUE(1, 2);
1250 CASE(_dup2_x2): /* insert top 2 slots four down */
1251 dup2_x2(topOfStack);
1252 UPDATE_PC_AND_TOS_AND_CONTINUE(1, 2);
1254 CASE(_swap): { /* swap top two elements on the stack */
1255 swap(topOfStack);
1256 UPDATE_PC_AND_CONTINUE(1);
1257 }
1259 /* Perform various binary integer operations */
1261 #undef OPC_INT_BINARY
1262 #define OPC_INT_BINARY(opcname, opname, test) \
1263 CASE(_i##opcname): \
1264 if (test && (STACK_INT(-1) == 0)) { \
1265 VM_JAVA_ERROR(vmSymbols::java_lang_ArithmeticException(), \
1266 "/ by zero", note_div0Check_trap); \
1267 } \
1268 SET_STACK_INT(VMint##opname(STACK_INT(-2), \
1269 STACK_INT(-1)), \
1270 -2); \
1271 UPDATE_PC_AND_TOS_AND_CONTINUE(1, -1); \
1272 CASE(_l##opcname): \
1273 { \
1274 if (test) { \
1275 jlong l1 = STACK_LONG(-1); \
1276 if (VMlongEqz(l1)) { \
1277 VM_JAVA_ERROR(vmSymbols::java_lang_ArithmeticException(), \
1278 "/ by long zero", note_div0Check_trap); \
1279 } \
1280 } \
1281 /* First long at (-1,-2) next long at (-3,-4) */ \
1282 SET_STACK_LONG(VMlong##opname(STACK_LONG(-3), \
1283 STACK_LONG(-1)), \
1284 -3); \
1285 UPDATE_PC_AND_TOS_AND_CONTINUE(1, -2); \
1286 }
1288 OPC_INT_BINARY(add, Add, 0);
1289 OPC_INT_BINARY(sub, Sub, 0);
1290 OPC_INT_BINARY(mul, Mul, 0);
1291 OPC_INT_BINARY(and, And, 0);
1292 OPC_INT_BINARY(or, Or, 0);
1293 OPC_INT_BINARY(xor, Xor, 0);
1294 OPC_INT_BINARY(div, Div, 1);
1295 OPC_INT_BINARY(rem, Rem, 1);
1298 /* Perform various binary floating number operations */
1299 /* On some machine/platforms/compilers div zero check can be implicit */
1301 #undef OPC_FLOAT_BINARY
1302 #define OPC_FLOAT_BINARY(opcname, opname) \
1303 CASE(_d##opcname): { \
1304 SET_STACK_DOUBLE(VMdouble##opname(STACK_DOUBLE(-3), \
1305 STACK_DOUBLE(-1)), \
1306 -3); \
1307 UPDATE_PC_AND_TOS_AND_CONTINUE(1, -2); \
1308 } \
1309 CASE(_f##opcname): \
1310 SET_STACK_FLOAT(VMfloat##opname(STACK_FLOAT(-2), \
1311 STACK_FLOAT(-1)), \
1312 -2); \
1313 UPDATE_PC_AND_TOS_AND_CONTINUE(1, -1);
1316 OPC_FLOAT_BINARY(add, Add);
1317 OPC_FLOAT_BINARY(sub, Sub);
1318 OPC_FLOAT_BINARY(mul, Mul);
1319 OPC_FLOAT_BINARY(div, Div);
1320 OPC_FLOAT_BINARY(rem, Rem);
1322 /* Shift operations
1323 * Shift left int and long: ishl, lshl
1324 * Logical shift right int and long w/zero extension: iushr, lushr
1325 * Arithmetic shift right int and long w/sign extension: ishr, lshr
1326 */
1328 #undef OPC_SHIFT_BINARY
1329 #define OPC_SHIFT_BINARY(opcname, opname) \
1330 CASE(_i##opcname): \
1331 SET_STACK_INT(VMint##opname(STACK_INT(-2), \
1332 STACK_INT(-1)), \
1333 -2); \
1334 UPDATE_PC_AND_TOS_AND_CONTINUE(1, -1); \
1335 CASE(_l##opcname): \
1336 { \
1337 SET_STACK_LONG(VMlong##opname(STACK_LONG(-2), \
1338 STACK_INT(-1)), \
1339 -2); \
1340 UPDATE_PC_AND_TOS_AND_CONTINUE(1, -1); \
1341 }
1343 OPC_SHIFT_BINARY(shl, Shl);
1344 OPC_SHIFT_BINARY(shr, Shr);
1345 OPC_SHIFT_BINARY(ushr, Ushr);
1347 /* Increment local variable by constant */
1348 CASE(_iinc):
1349 {
1350 // locals[pc[1]].j.i += (jbyte)(pc[2]);
1351 SET_LOCALS_INT(LOCALS_INT(pc[1]) + (jbyte)(pc[2]), pc[1]);
1352 UPDATE_PC_AND_CONTINUE(3);
1353 }
1355 /* negate the value on the top of the stack */
1357 CASE(_ineg):
1358 SET_STACK_INT(VMintNeg(STACK_INT(-1)), -1);
1359 UPDATE_PC_AND_CONTINUE(1);
1361 CASE(_fneg):
1362 SET_STACK_FLOAT(VMfloatNeg(STACK_FLOAT(-1)), -1);
1363 UPDATE_PC_AND_CONTINUE(1);
1365 CASE(_lneg):
1366 {
1367 SET_STACK_LONG(VMlongNeg(STACK_LONG(-1)), -1);
1368 UPDATE_PC_AND_CONTINUE(1);
1369 }
1371 CASE(_dneg):
1372 {
1373 SET_STACK_DOUBLE(VMdoubleNeg(STACK_DOUBLE(-1)), -1);
1374 UPDATE_PC_AND_CONTINUE(1);
1375 }
1377 /* Conversion operations */
1379 CASE(_i2f): /* convert top of stack int to float */
1380 SET_STACK_FLOAT(VMint2Float(STACK_INT(-1)), -1);
1381 UPDATE_PC_AND_CONTINUE(1);
1383 CASE(_i2l): /* convert top of stack int to long */
1384 {
1385 // this is ugly QQQ
1386 jlong r = VMint2Long(STACK_INT(-1));
1387 MORE_STACK(-1); // Pop
1388 SET_STACK_LONG(r, 1);
1390 UPDATE_PC_AND_TOS_AND_CONTINUE(1, 2);
1391 }
1393 CASE(_i2d): /* convert top of stack int to double */
1394 {
1395 // this is ugly QQQ (why cast to jlong?? )
1396 jdouble r = (jlong)STACK_INT(-1);
1397 MORE_STACK(-1); // Pop
1398 SET_STACK_DOUBLE(r, 1);
1400 UPDATE_PC_AND_TOS_AND_CONTINUE(1, 2);
1401 }
1403 CASE(_l2i): /* convert top of stack long to int */
1404 {
1405 jint r = VMlong2Int(STACK_LONG(-1));
1406 MORE_STACK(-2); // Pop
1407 SET_STACK_INT(r, 0);
1408 UPDATE_PC_AND_TOS_AND_CONTINUE(1, 1);
1409 }
1411 CASE(_l2f): /* convert top of stack long to float */
1412 {
1413 jlong r = STACK_LONG(-1);
1414 MORE_STACK(-2); // Pop
1415 SET_STACK_FLOAT(VMlong2Float(r), 0);
1416 UPDATE_PC_AND_TOS_AND_CONTINUE(1, 1);
1417 }
1419 CASE(_l2d): /* convert top of stack long to double */
1420 {
1421 jlong r = STACK_LONG(-1);
1422 MORE_STACK(-2); // Pop
1423 SET_STACK_DOUBLE(VMlong2Double(r), 1);
1424 UPDATE_PC_AND_TOS_AND_CONTINUE(1, 2);
1425 }
1427 CASE(_f2i): /* Convert top of stack float to int */
1428 SET_STACK_INT(SharedRuntime::f2i(STACK_FLOAT(-1)), -1);
1429 UPDATE_PC_AND_CONTINUE(1);
1431 CASE(_f2l): /* convert top of stack float to long */
1432 {
1433 jlong r = SharedRuntime::f2l(STACK_FLOAT(-1));
1434 MORE_STACK(-1); // POP
1435 SET_STACK_LONG(r, 1);
1436 UPDATE_PC_AND_TOS_AND_CONTINUE(1, 2);
1437 }
1439 CASE(_f2d): /* convert top of stack float to double */
1440 {
1441 jfloat f;
1442 jdouble r;
1443 f = STACK_FLOAT(-1);
1444 r = (jdouble) f;
1445 MORE_STACK(-1); // POP
1446 SET_STACK_DOUBLE(r, 1);
1447 UPDATE_PC_AND_TOS_AND_CONTINUE(1, 2);
1448 }
1450 CASE(_d2i): /* convert top of stack double to int */
1451 {
1452 jint r1 = SharedRuntime::d2i(STACK_DOUBLE(-1));
1453 MORE_STACK(-2);
1454 SET_STACK_INT(r1, 0);
1455 UPDATE_PC_AND_TOS_AND_CONTINUE(1, 1);
1456 }
1458 CASE(_d2f): /* convert top of stack double to float */
1459 {
1460 jfloat r1 = VMdouble2Float(STACK_DOUBLE(-1));
1461 MORE_STACK(-2);
1462 SET_STACK_FLOAT(r1, 0);
1463 UPDATE_PC_AND_TOS_AND_CONTINUE(1, 1);
1464 }
1466 CASE(_d2l): /* convert top of stack double to long */
1467 {
1468 jlong r1 = SharedRuntime::d2l(STACK_DOUBLE(-1));
1469 MORE_STACK(-2);
1470 SET_STACK_LONG(r1, 1);
1471 UPDATE_PC_AND_TOS_AND_CONTINUE(1, 2);
1472 }
1474 CASE(_i2b):
1475 SET_STACK_INT(VMint2Byte(STACK_INT(-1)), -1);
1476 UPDATE_PC_AND_CONTINUE(1);
1478 CASE(_i2c):
1479 SET_STACK_INT(VMint2Char(STACK_INT(-1)), -1);
1480 UPDATE_PC_AND_CONTINUE(1);
1482 CASE(_i2s):
1483 SET_STACK_INT(VMint2Short(STACK_INT(-1)), -1);
1484 UPDATE_PC_AND_CONTINUE(1);
1486 /* comparison operators */
1489 #define COMPARISON_OP(name, comparison) \
1490 CASE(_if_icmp##name): { \
1491 const bool cmp = (STACK_INT(-2) comparison STACK_INT(-1)); \
1492 int skip = cmp \
1493 ? (int16_t)Bytes::get_Java_u2(pc + 1) : 3; \
1494 address branch_pc = pc; \
1495 /* Profile branch. */ \
1496 BI_PROFILE_UPDATE_BRANCH(/*is_taken=*/cmp); \
1497 UPDATE_PC_AND_TOS(skip, -2); \
1498 DO_BACKEDGE_CHECKS(skip, branch_pc); \
1499 CONTINUE; \
1500 } \
1501 CASE(_if##name): { \
1502 const bool cmp = (STACK_INT(-1) comparison 0); \
1503 int skip = cmp \
1504 ? (int16_t)Bytes::get_Java_u2(pc + 1) : 3; \
1505 address branch_pc = pc; \
1506 /* Profile branch. */ \
1507 BI_PROFILE_UPDATE_BRANCH(/*is_taken=*/cmp); \
1508 UPDATE_PC_AND_TOS(skip, -1); \
1509 DO_BACKEDGE_CHECKS(skip, branch_pc); \
1510 CONTINUE; \
1511 }
1513 #define COMPARISON_OP2(name, comparison) \
1514 COMPARISON_OP(name, comparison) \
1515 CASE(_if_acmp##name): { \
1516 const bool cmp = (STACK_OBJECT(-2) comparison STACK_OBJECT(-1)); \
1517 int skip = cmp \
1518 ? (int16_t)Bytes::get_Java_u2(pc + 1) : 3; \
1519 address branch_pc = pc; \
1520 /* Profile branch. */ \
1521 BI_PROFILE_UPDATE_BRANCH(/*is_taken=*/cmp); \
1522 UPDATE_PC_AND_TOS(skip, -2); \
1523 DO_BACKEDGE_CHECKS(skip, branch_pc); \
1524 CONTINUE; \
1525 }
1527 #define NULL_COMPARISON_NOT_OP(name) \
1528 CASE(_if##name): { \
1529 const bool cmp = (!(STACK_OBJECT(-1) == NULL)); \
1530 int skip = cmp \
1531 ? (int16_t)Bytes::get_Java_u2(pc + 1) : 3; \
1532 address branch_pc = pc; \
1533 /* Profile branch. */ \
1534 BI_PROFILE_UPDATE_BRANCH(/*is_taken=*/cmp); \
1535 UPDATE_PC_AND_TOS(skip, -1); \
1536 DO_BACKEDGE_CHECKS(skip, branch_pc); \
1537 CONTINUE; \
1538 }
1540 #define NULL_COMPARISON_OP(name) \
1541 CASE(_if##name): { \
1542 const bool cmp = ((STACK_OBJECT(-1) == NULL)); \
1543 int skip = cmp \
1544 ? (int16_t)Bytes::get_Java_u2(pc + 1) : 3; \
1545 address branch_pc = pc; \
1546 /* Profile branch. */ \
1547 BI_PROFILE_UPDATE_BRANCH(/*is_taken=*/cmp); \
1548 UPDATE_PC_AND_TOS(skip, -1); \
1549 DO_BACKEDGE_CHECKS(skip, branch_pc); \
1550 CONTINUE; \
1551 }
1552 COMPARISON_OP(lt, <);
1553 COMPARISON_OP(gt, >);
1554 COMPARISON_OP(le, <=);
1555 COMPARISON_OP(ge, >=);
1556 COMPARISON_OP2(eq, ==); /* include ref comparison */
1557 COMPARISON_OP2(ne, !=); /* include ref comparison */
1558 NULL_COMPARISON_OP(null);
1559 NULL_COMPARISON_NOT_OP(nonnull);
1561 /* Goto pc at specified offset in switch table. */
1563 CASE(_tableswitch): {
1564 jint* lpc = (jint*)VMalignWordUp(pc+1);
1565 int32_t key = STACK_INT(-1);
1566 int32_t low = Bytes::get_Java_u4((address)&lpc[1]);
1567 int32_t high = Bytes::get_Java_u4((address)&lpc[2]);
1568 int32_t skip;
1569 key -= low;
1570 if (((uint32_t) key > (uint32_t)(high - low))) {
1571 key = -1;
1572 skip = Bytes::get_Java_u4((address)&lpc[0]);
1573 } else {
1574 skip = Bytes::get_Java_u4((address)&lpc[key + 3]);
1575 }
1576 // Profile switch.
1577 BI_PROFILE_UPDATE_SWITCH(/*switch_index=*/key);
1578 // Does this really need a full backedge check (osr)?
1579 address branch_pc = pc;
1580 UPDATE_PC_AND_TOS(skip, -1);
1581 DO_BACKEDGE_CHECKS(skip, branch_pc);
1582 CONTINUE;
1583 }
1585 /* Goto pc whose table entry matches specified key. */
1587 CASE(_lookupswitch): {
1588 jint* lpc = (jint*)VMalignWordUp(pc+1);
1589 int32_t key = STACK_INT(-1);
1590 int32_t skip = Bytes::get_Java_u4((address) lpc); /* default amount */
1591 // Remember index.
1592 int index = -1;
1593 int newindex = 0;
1594 int32_t npairs = Bytes::get_Java_u4((address) &lpc[1]);
1595 while (--npairs >= 0) {
1596 lpc += 2;
1597 if (key == (int32_t)Bytes::get_Java_u4((address)lpc)) {
1598 skip = Bytes::get_Java_u4((address)&lpc[1]);
1599 index = newindex;
1600 break;
1601 }
1602 newindex += 1;
1603 }
1604 // Profile switch.
1605 BI_PROFILE_UPDATE_SWITCH(/*switch_index=*/index);
1606 address branch_pc = pc;
1607 UPDATE_PC_AND_TOS(skip, -1);
1608 DO_BACKEDGE_CHECKS(skip, branch_pc);
1609 CONTINUE;
1610 }
1612 CASE(_fcmpl):
1613 CASE(_fcmpg):
1614 {
1615 SET_STACK_INT(VMfloatCompare(STACK_FLOAT(-2),
1616 STACK_FLOAT(-1),
1617 (opcode == Bytecodes::_fcmpl ? -1 : 1)),
1618 -2);
1619 UPDATE_PC_AND_TOS_AND_CONTINUE(1, -1);
1620 }
1622 CASE(_dcmpl):
1623 CASE(_dcmpg):
1624 {
1625 int r = VMdoubleCompare(STACK_DOUBLE(-3),
1626 STACK_DOUBLE(-1),
1627 (opcode == Bytecodes::_dcmpl ? -1 : 1));
1628 MORE_STACK(-4); // Pop
1629 SET_STACK_INT(r, 0);
1630 UPDATE_PC_AND_TOS_AND_CONTINUE(1, 1);
1631 }
1633 CASE(_lcmp):
1634 {
1635 int r = VMlongCompare(STACK_LONG(-3), STACK_LONG(-1));
1636 MORE_STACK(-4);
1637 SET_STACK_INT(r, 0);
1638 UPDATE_PC_AND_TOS_AND_CONTINUE(1, 1);
1639 }
1642 /* Return from a method */
1644 CASE(_areturn):
1645 CASE(_ireturn):
1646 CASE(_freturn):
1647 {
1648 // Allow a safepoint before returning to frame manager.
1649 SAFEPOINT;
1651 goto handle_return;
1652 }
1654 CASE(_lreturn):
1655 CASE(_dreturn):
1656 {
1657 // Allow a safepoint before returning to frame manager.
1658 SAFEPOINT;
1659 goto handle_return;
1660 }
1662 CASE(_return_register_finalizer): {
1664 oop rcvr = LOCALS_OBJECT(0);
1665 VERIFY_OOP(rcvr);
1666 if (rcvr->klass()->has_finalizer()) {
1667 CALL_VM(InterpreterRuntime::register_finalizer(THREAD, rcvr), handle_exception);
1668 }
1669 goto handle_return;
1670 }
1671 CASE(_return): {
1673 // Allow a safepoint before returning to frame manager.
1674 SAFEPOINT;
1675 goto handle_return;
1676 }
1678 /* Array access byte-codes */
1680 /* Every array access byte-code starts out like this */
1681 // arrayOopDesc* arrObj = (arrayOopDesc*)STACK_OBJECT(arrayOff);
1682 #define ARRAY_INTRO(arrayOff) \
1683 arrayOop arrObj = (arrayOop)STACK_OBJECT(arrayOff); \
1684 jint index = STACK_INT(arrayOff + 1); \
1685 char message[jintAsStringSize]; \
1686 CHECK_NULL(arrObj); \
1687 if ((uint32_t)index >= (uint32_t)arrObj->length()) { \
1688 sprintf(message, "%d", index); \
1689 VM_JAVA_ERROR(vmSymbols::java_lang_ArrayIndexOutOfBoundsException(), \
1690 message, note_rangeCheck_trap); \
1691 }
1693 /* 32-bit loads. These handle conversion from < 32-bit types */
1694 #define ARRAY_LOADTO32(T, T2, format, stackRes, extra) \
1695 { \
1696 ARRAY_INTRO(-2); \
1697 (void)extra; \
1698 SET_ ## stackRes(*(T2 *)(((address) arrObj->base(T)) + index * sizeof(T2)), \
1699 -2); \
1700 UPDATE_PC_AND_TOS_AND_CONTINUE(1, -1); \
1701 }
1703 /* 64-bit loads */
1704 #define ARRAY_LOADTO64(T,T2, stackRes, extra) \
1705 { \
1706 ARRAY_INTRO(-2); \
1707 SET_ ## stackRes(*(T2 *)(((address) arrObj->base(T)) + index * sizeof(T2)), -1); \
1708 (void)extra; \
1709 UPDATE_PC_AND_CONTINUE(1); \
1710 }
1712 CASE(_iaload):
1713 ARRAY_LOADTO32(T_INT, jint, "%d", STACK_INT, 0);
1714 CASE(_faload):
1715 ARRAY_LOADTO32(T_FLOAT, jfloat, "%f", STACK_FLOAT, 0);
1716 CASE(_aaload): {
1717 ARRAY_INTRO(-2);
1718 SET_STACK_OBJECT(((objArrayOop) arrObj)->obj_at(index), -2);
1719 UPDATE_PC_AND_TOS_AND_CONTINUE(1, -1);
1720 }
1721 CASE(_baload):
1722 ARRAY_LOADTO32(T_BYTE, jbyte, "%d", STACK_INT, 0);
1723 CASE(_caload):
1724 ARRAY_LOADTO32(T_CHAR, jchar, "%d", STACK_INT, 0);
1725 CASE(_saload):
1726 ARRAY_LOADTO32(T_SHORT, jshort, "%d", STACK_INT, 0);
1727 CASE(_laload):
1728 ARRAY_LOADTO64(T_LONG, jlong, STACK_LONG, 0);
1729 CASE(_daload):
1730 ARRAY_LOADTO64(T_DOUBLE, jdouble, STACK_DOUBLE, 0);
1732 /* 32-bit stores. These handle conversion to < 32-bit types */
1733 #define ARRAY_STOREFROM32(T, T2, format, stackSrc, extra) \
1734 { \
1735 ARRAY_INTRO(-3); \
1736 (void)extra; \
1737 *(T2 *)(((address) arrObj->base(T)) + index * sizeof(T2)) = stackSrc( -1); \
1738 UPDATE_PC_AND_TOS_AND_CONTINUE(1, -3); \
1739 }
1741 /* 64-bit stores */
1742 #define ARRAY_STOREFROM64(T, T2, stackSrc, extra) \
1743 { \
1744 ARRAY_INTRO(-4); \
1745 (void)extra; \
1746 *(T2 *)(((address) arrObj->base(T)) + index * sizeof(T2)) = stackSrc( -1); \
1747 UPDATE_PC_AND_TOS_AND_CONTINUE(1, -4); \
1748 }
1750 CASE(_iastore):
1751 ARRAY_STOREFROM32(T_INT, jint, "%d", STACK_INT, 0);
1752 CASE(_fastore):
1753 ARRAY_STOREFROM32(T_FLOAT, jfloat, "%f", STACK_FLOAT, 0);
1754 /*
1755 * This one looks different because of the assignability check
1756 */
1757 CASE(_aastore): {
1758 oop rhsObject = STACK_OBJECT(-1);
1759 VERIFY_OOP(rhsObject);
1760 ARRAY_INTRO( -3);
1761 // arrObj, index are set
1762 if (rhsObject != NULL) {
1763 /* Check assignability of rhsObject into arrObj */
1764 Klass* rhsKlass = rhsObject->klass(); // EBX (subclass)
1765 Klass* elemKlass = ObjArrayKlass::cast(arrObj->klass())->element_klass(); // superklass EAX
1766 //
1767 // Check for compatibilty. This check must not GC!!
1768 // Seems way more expensive now that we must dispatch
1769 //
1770 if (rhsKlass != elemKlass && !rhsKlass->is_subtype_of(elemKlass)) { // ebx->is...
1771 // Decrement counter if subtype check failed.
1772 BI_PROFILE_SUBTYPECHECK_FAILED(rhsKlass);
1773 VM_JAVA_ERROR(vmSymbols::java_lang_ArrayStoreException(), "", note_arrayCheck_trap);
1774 }
1775 // Profile checkcast with null_seen and receiver.
1776 BI_PROFILE_UPDATE_CHECKCAST(/*null_seen=*/false, rhsKlass);
1777 } else {
1778 // Profile checkcast with null_seen and receiver.
1779 BI_PROFILE_UPDATE_CHECKCAST(/*null_seen=*/true, NULL);
1780 }
1781 ((objArrayOop) arrObj)->obj_at_put(index, rhsObject);
1782 UPDATE_PC_AND_TOS_AND_CONTINUE(1, -3);
1783 }
1784 CASE(_bastore): {
1785 ARRAY_INTRO(-3);
1786 int item = STACK_INT(-1);
1787 // if it is a T_BOOLEAN array, mask the stored value to 0/1
1788 if (arrObj->klass() == Universe::boolArrayKlassObj()) {
1789 item &= 1;
1790 } else {
1791 assert(arrObj->klass() == Universe::byteArrayKlassObj(),
1792 "should be byte array otherwise");
1793 }
1794 ((typeArrayOop)arrObj)->byte_at_put(index, item);
1795 UPDATE_PC_AND_TOS_AND_CONTINUE(1, -3);
1796 }
1797 CASE(_castore):
1798 ARRAY_STOREFROM32(T_CHAR, jchar, "%d", STACK_INT, 0);
1799 CASE(_sastore):
1800 ARRAY_STOREFROM32(T_SHORT, jshort, "%d", STACK_INT, 0);
1801 CASE(_lastore):
1802 ARRAY_STOREFROM64(T_LONG, jlong, STACK_LONG, 0);
1803 CASE(_dastore):
1804 ARRAY_STOREFROM64(T_DOUBLE, jdouble, STACK_DOUBLE, 0);
1806 CASE(_arraylength):
1807 {
1808 arrayOop ary = (arrayOop) STACK_OBJECT(-1);
1809 CHECK_NULL(ary);
1810 SET_STACK_INT(ary->length(), -1);
1811 UPDATE_PC_AND_CONTINUE(1);
1812 }
1814 /* monitorenter and monitorexit for locking/unlocking an object */
1816 CASE(_monitorenter): {
1817 oop lockee = STACK_OBJECT(-1);
1818 // derefing's lockee ought to provoke implicit null check
1819 CHECK_NULL(lockee);
1820 // find a free monitor or one already allocated for this object
1821 // if we find a matching object then we need a new monitor
1822 // since this is recursive enter
1823 BasicObjectLock* limit = istate->monitor_base();
1824 BasicObjectLock* most_recent = (BasicObjectLock*) istate->stack_base();
1825 BasicObjectLock* entry = NULL;
1826 while (most_recent != limit ) {
1827 if (most_recent->obj() == NULL) entry = most_recent;
1828 else if (most_recent->obj() == lockee) break;
1829 most_recent++;
1830 }
1831 if (entry != NULL) {
1832 entry->set_obj(lockee);
1833 int success = false;
1834 uintptr_t epoch_mask_in_place = (uintptr_t)markOopDesc::epoch_mask_in_place;
1836 markOop mark = lockee->mark();
1837 intptr_t hash = (intptr_t) markOopDesc::no_hash;
1838 // implies UseBiasedLocking
1839 if (mark->has_bias_pattern()) {
1840 uintptr_t thread_ident;
1841 uintptr_t anticipated_bias_locking_value;
1842 thread_ident = (uintptr_t)istate->thread();
1843 anticipated_bias_locking_value =
1844 (((uintptr_t)lockee->klass()->prototype_header() | thread_ident) ^ (uintptr_t)mark) &
1845 ~((uintptr_t) markOopDesc::age_mask_in_place);
1847 if (anticipated_bias_locking_value == 0) {
1848 // already biased towards this thread, nothing to do
1849 if (PrintBiasedLockingStatistics) {
1850 (* BiasedLocking::biased_lock_entry_count_addr())++;
1851 }
1852 success = true;
1853 }
1854 else if ((anticipated_bias_locking_value & markOopDesc::biased_lock_mask_in_place) != 0) {
1855 // try revoke bias
1856 markOop header = lockee->klass()->prototype_header();
1857 if (hash != markOopDesc::no_hash) {
1858 header = header->copy_set_hash(hash);
1859 }
1860 if (Atomic::cmpxchg_ptr(header, lockee->mark_addr(), mark) == mark) {
1861 if (PrintBiasedLockingStatistics)
1862 (*BiasedLocking::revoked_lock_entry_count_addr())++;
1863 }
1864 }
1865 else if ((anticipated_bias_locking_value & epoch_mask_in_place) !=0) {
1866 // try rebias
1867 markOop new_header = (markOop) ( (intptr_t) lockee->klass()->prototype_header() | thread_ident);
1868 if (hash != markOopDesc::no_hash) {
1869 new_header = new_header->copy_set_hash(hash);
1870 }
1871 if (Atomic::cmpxchg_ptr((void*)new_header, lockee->mark_addr(), mark) == mark) {
1872 if (PrintBiasedLockingStatistics)
1873 (* BiasedLocking::rebiased_lock_entry_count_addr())++;
1874 }
1875 else {
1876 CALL_VM(InterpreterRuntime::monitorenter(THREAD, entry), handle_exception);
1877 }
1878 success = true;
1879 }
1880 else {
1881 // try to bias towards thread in case object is anonymously biased
1882 markOop header = (markOop) ((uintptr_t) mark & ((uintptr_t)markOopDesc::biased_lock_mask_in_place |
1883 (uintptr_t)markOopDesc::age_mask_in_place |
1884 epoch_mask_in_place));
1885 if (hash != markOopDesc::no_hash) {
1886 header = header->copy_set_hash(hash);
1887 }
1888 markOop new_header = (markOop) ((uintptr_t) header | thread_ident);
1889 // debugging hint
1890 DEBUG_ONLY(entry->lock()->set_displaced_header((markOop) (uintptr_t) 0xdeaddead);)
1891 if (Atomic::cmpxchg_ptr((void*)new_header, lockee->mark_addr(), header) == header) {
1892 if (PrintBiasedLockingStatistics)
1893 (* BiasedLocking::anonymously_biased_lock_entry_count_addr())++;
1894 }
1895 else {
1896 CALL_VM(InterpreterRuntime::monitorenter(THREAD, entry), handle_exception);
1897 }
1898 success = true;
1899 }
1900 }
1902 // traditional lightweight locking
1903 if (!success) {
1904 markOop displaced = lockee->mark()->set_unlocked();
1905 entry->lock()->set_displaced_header(displaced);
1906 bool call_vm = UseHeavyMonitors;
1907 if (call_vm || Atomic::cmpxchg_ptr(entry, lockee->mark_addr(), displaced) != displaced) {
1908 // Is it simple recursive case?
1909 if (!call_vm && THREAD->is_lock_owned((address) displaced->clear_lock_bits())) {
1910 entry->lock()->set_displaced_header(NULL);
1911 } else {
1912 CALL_VM(InterpreterRuntime::monitorenter(THREAD, entry), handle_exception);
1913 }
1914 }
1915 }
1916 UPDATE_PC_AND_TOS_AND_CONTINUE(1, -1);
1917 } else {
1918 istate->set_msg(more_monitors);
1919 UPDATE_PC_AND_RETURN(0); // Re-execute
1920 }
1921 }
1923 CASE(_monitorexit): {
1924 oop lockee = STACK_OBJECT(-1);
1925 CHECK_NULL(lockee);
1926 // derefing's lockee ought to provoke implicit null check
1927 // find our monitor slot
1928 BasicObjectLock* limit = istate->monitor_base();
1929 BasicObjectLock* most_recent = (BasicObjectLock*) istate->stack_base();
1930 while (most_recent != limit ) {
1931 if ((most_recent)->obj() == lockee) {
1932 BasicLock* lock = most_recent->lock();
1933 markOop header = lock->displaced_header();
1934 most_recent->set_obj(NULL);
1935 if (!lockee->mark()->has_bias_pattern()) {
1936 bool call_vm = UseHeavyMonitors;
1937 // If it isn't recursive we either must swap old header or call the runtime
1938 if (header != NULL || call_vm) {
1939 if (call_vm || Atomic::cmpxchg_ptr(header, lockee->mark_addr(), lock) != lock) {
1940 // restore object for the slow case
1941 most_recent->set_obj(lockee);
1942 CALL_VM(InterpreterRuntime::monitorexit(THREAD, most_recent), handle_exception);
1943 }
1944 }
1945 }
1946 UPDATE_PC_AND_TOS_AND_CONTINUE(1, -1);
1947 }
1948 most_recent++;
1949 }
1950 // Need to throw illegal monitor state exception
1951 CALL_VM(InterpreterRuntime::throw_illegal_monitor_state_exception(THREAD), handle_exception);
1952 ShouldNotReachHere();
1953 }
1955 /* All of the non-quick opcodes. */
1957 /* -Set clobbersCpIndex true if the quickened opcode clobbers the
1958 * constant pool index in the instruction.
1959 */
1960 CASE(_getfield):
1961 CASE(_getstatic):
1962 {
1963 u2 index;
1964 ConstantPoolCacheEntry* cache;
1965 index = Bytes::get_native_u2(pc+1);
1967 // QQQ Need to make this as inlined as possible. Probably need to
1968 // split all the bytecode cases out so c++ compiler has a chance
1969 // for constant prop to fold everything possible away.
1971 cache = cp->entry_at(index);
1972 if (!cache->is_resolved((Bytecodes::Code)opcode)) {
1973 CALL_VM(InterpreterRuntime::resolve_get_put(THREAD, (Bytecodes::Code)opcode),
1974 handle_exception);
1975 cache = cp->entry_at(index);
1976 }
1978 #ifdef VM_JVMTI
1979 if (_jvmti_interp_events) {
1980 int *count_addr;
1981 oop obj;
1982 // Check to see if a field modification watch has been set
1983 // before we take the time to call into the VM.
1984 count_addr = (int *)JvmtiExport::get_field_access_count_addr();
1985 if ( *count_addr > 0 ) {
1986 if ((Bytecodes::Code)opcode == Bytecodes::_getstatic) {
1987 obj = (oop)NULL;
1988 } else {
1989 obj = (oop) STACK_OBJECT(-1);
1990 VERIFY_OOP(obj);
1991 }
1992 CALL_VM(InterpreterRuntime::post_field_access(THREAD,
1993 obj,
1994 cache),
1995 handle_exception);
1996 }
1997 }
1998 #endif /* VM_JVMTI */
2000 oop obj;
2001 if ((Bytecodes::Code)opcode == Bytecodes::_getstatic) {
2002 Klass* k = cache->f1_as_klass();
2003 obj = k->java_mirror();
2004 MORE_STACK(1); // Assume single slot push
2005 } else {
2006 obj = (oop) STACK_OBJECT(-1);
2007 CHECK_NULL(obj);
2008 }
2010 //
2011 // Now store the result on the stack
2012 //
2013 TosState tos_type = cache->flag_state();
2014 int field_offset = cache->f2_as_index();
2015 if (cache->is_volatile()) {
2016 if (support_IRIW_for_not_multiple_copy_atomic_cpu) {
2017 OrderAccess::fence();
2018 }
2019 if (tos_type == atos) {
2020 VERIFY_OOP(obj->obj_field_acquire(field_offset));
2021 SET_STACK_OBJECT(obj->obj_field_acquire(field_offset), -1);
2022 } else if (tos_type == itos) {
2023 SET_STACK_INT(obj->int_field_acquire(field_offset), -1);
2024 } else if (tos_type == ltos) {
2025 SET_STACK_LONG(obj->long_field_acquire(field_offset), 0);
2026 MORE_STACK(1);
2027 } else if (tos_type == btos || tos_type == ztos) {
2028 SET_STACK_INT(obj->byte_field_acquire(field_offset), -1);
2029 } else if (tos_type == ctos) {
2030 SET_STACK_INT(obj->char_field_acquire(field_offset), -1);
2031 } else if (tos_type == stos) {
2032 SET_STACK_INT(obj->short_field_acquire(field_offset), -1);
2033 } else if (tos_type == ftos) {
2034 SET_STACK_FLOAT(obj->float_field_acquire(field_offset), -1);
2035 } else {
2036 SET_STACK_DOUBLE(obj->double_field_acquire(field_offset), 0);
2037 MORE_STACK(1);
2038 }
2039 } else {
2040 if (tos_type == atos) {
2041 VERIFY_OOP(obj->obj_field(field_offset));
2042 SET_STACK_OBJECT(obj->obj_field(field_offset), -1);
2043 } else if (tos_type == itos) {
2044 SET_STACK_INT(obj->int_field(field_offset), -1);
2045 } else if (tos_type == ltos) {
2046 SET_STACK_LONG(obj->long_field(field_offset), 0);
2047 MORE_STACK(1);
2048 } else if (tos_type == btos || tos_type == ztos) {
2049 SET_STACK_INT(obj->byte_field(field_offset), -1);
2050 } else if (tos_type == ctos) {
2051 SET_STACK_INT(obj->char_field(field_offset), -1);
2052 } else if (tos_type == stos) {
2053 SET_STACK_INT(obj->short_field(field_offset), -1);
2054 } else if (tos_type == ftos) {
2055 SET_STACK_FLOAT(obj->float_field(field_offset), -1);
2056 } else {
2057 SET_STACK_DOUBLE(obj->double_field(field_offset), 0);
2058 MORE_STACK(1);
2059 }
2060 }
2062 UPDATE_PC_AND_CONTINUE(3);
2063 }
2065 CASE(_putfield):
2066 CASE(_putstatic):
2067 {
2068 u2 index = Bytes::get_native_u2(pc+1);
2069 ConstantPoolCacheEntry* cache = cp->entry_at(index);
2070 if (!cache->is_resolved((Bytecodes::Code)opcode)) {
2071 CALL_VM(InterpreterRuntime::resolve_get_put(THREAD, (Bytecodes::Code)opcode),
2072 handle_exception);
2073 cache = cp->entry_at(index);
2074 }
2076 #ifdef VM_JVMTI
2077 if (_jvmti_interp_events) {
2078 int *count_addr;
2079 oop obj;
2080 // Check to see if a field modification watch has been set
2081 // before we take the time to call into the VM.
2082 count_addr = (int *)JvmtiExport::get_field_modification_count_addr();
2083 if ( *count_addr > 0 ) {
2084 if ((Bytecodes::Code)opcode == Bytecodes::_putstatic) {
2085 obj = (oop)NULL;
2086 }
2087 else {
2088 if (cache->is_long() || cache->is_double()) {
2089 obj = (oop) STACK_OBJECT(-3);
2090 } else {
2091 obj = (oop) STACK_OBJECT(-2);
2092 }
2093 VERIFY_OOP(obj);
2094 }
2096 CALL_VM(InterpreterRuntime::post_field_modification(THREAD,
2097 obj,
2098 cache,
2099 (jvalue *)STACK_SLOT(-1)),
2100 handle_exception);
2101 }
2102 }
2103 #endif /* VM_JVMTI */
2105 // QQQ Need to make this as inlined as possible. Probably need to split all the bytecode cases
2106 // out so c++ compiler has a chance for constant prop to fold everything possible away.
2108 oop obj;
2109 int count;
2110 TosState tos_type = cache->flag_state();
2112 count = -1;
2113 if (tos_type == ltos || tos_type == dtos) {
2114 --count;
2115 }
2116 if ((Bytecodes::Code)opcode == Bytecodes::_putstatic) {
2117 Klass* k = cache->f1_as_klass();
2118 obj = k->java_mirror();
2119 } else {
2120 --count;
2121 obj = (oop) STACK_OBJECT(count);
2122 CHECK_NULL(obj);
2123 }
2125 //
2126 // Now store the result
2127 //
2128 int field_offset = cache->f2_as_index();
2129 if (cache->is_volatile()) {
2130 if (tos_type == itos) {
2131 obj->release_int_field_put(field_offset, STACK_INT(-1));
2132 } else if (tos_type == atos) {
2133 VERIFY_OOP(STACK_OBJECT(-1));
2134 obj->release_obj_field_put(field_offset, STACK_OBJECT(-1));
2135 } else if (tos_type == btos) {
2136 obj->release_byte_field_put(field_offset, STACK_INT(-1));
2137 } else if (tos_type == ztos) {
2138 int bool_field = STACK_INT(-1); // only store LSB
2139 obj->release_byte_field_put(field_offset, (bool_field & 1));
2140 } else if (tos_type == ltos) {
2141 obj->release_long_field_put(field_offset, STACK_LONG(-1));
2142 } else if (tos_type == ctos) {
2143 obj->release_char_field_put(field_offset, STACK_INT(-1));
2144 } else if (tos_type == stos) {
2145 obj->release_short_field_put(field_offset, STACK_INT(-1));
2146 } else if (tos_type == ftos) {
2147 obj->release_float_field_put(field_offset, STACK_FLOAT(-1));
2148 } else {
2149 obj->release_double_field_put(field_offset, STACK_DOUBLE(-1));
2150 }
2151 OrderAccess::storeload();
2152 } else {
2153 if (tos_type == itos) {
2154 obj->int_field_put(field_offset, STACK_INT(-1));
2155 } else if (tos_type == atos) {
2156 VERIFY_OOP(STACK_OBJECT(-1));
2157 obj->obj_field_put(field_offset, STACK_OBJECT(-1));
2158 } else if (tos_type == btos) {
2159 obj->byte_field_put(field_offset, STACK_INT(-1));
2160 } else if (tos_type == ztos) {
2161 int bool_field = STACK_INT(-1); // only store LSB
2162 obj->byte_field_put(field_offset, (bool_field & 1));
2163 } else if (tos_type == ltos) {
2164 obj->long_field_put(field_offset, STACK_LONG(-1));
2165 } else if (tos_type == ctos) {
2166 obj->char_field_put(field_offset, STACK_INT(-1));
2167 } else if (tos_type == stos) {
2168 obj->short_field_put(field_offset, STACK_INT(-1));
2169 } else if (tos_type == ftos) {
2170 obj->float_field_put(field_offset, STACK_FLOAT(-1));
2171 } else {
2172 obj->double_field_put(field_offset, STACK_DOUBLE(-1));
2173 }
2174 }
2176 UPDATE_PC_AND_TOS_AND_CONTINUE(3, count);
2177 }
2179 CASE(_new): {
2180 u2 index = Bytes::get_Java_u2(pc+1);
2181 ConstantPool* constants = istate->method()->constants();
2182 if (!constants->tag_at(index).is_unresolved_klass()) {
2183 // Make sure klass is initialized and doesn't have a finalizer
2184 Klass* entry = constants->slot_at(index).get_klass();
2185 assert(entry->is_klass(), "Should be resolved klass");
2186 Klass* k_entry = (Klass*) entry;
2187 assert(k_entry->oop_is_instance(), "Should be InstanceKlass");
2188 InstanceKlass* ik = (InstanceKlass*) k_entry;
2189 if ( ik->is_initialized() && ik->can_be_fastpath_allocated() ) {
2190 size_t obj_size = ik->size_helper();
2191 oop result = NULL;
2192 // If the TLAB isn't pre-zeroed then we'll have to do it
2193 bool need_zero = !ZeroTLAB;
2194 if (UseTLAB) {
2195 result = (oop) THREAD->tlab().allocate(obj_size);
2196 }
2197 // Disable non-TLAB-based fast-path, because profiling requires that all
2198 // allocations go through InterpreterRuntime::_new() if THREAD->tlab().allocate
2199 // returns NULL.
2200 #ifndef CC_INTERP_PROFILE
2201 if (result == NULL) {
2202 need_zero = true;
2203 // Try allocate in shared eden
2204 retry:
2205 HeapWord* compare_to = *Universe::heap()->top_addr();
2206 HeapWord* new_top = compare_to + obj_size;
2207 if (new_top <= *Universe::heap()->end_addr()) {
2208 if (Atomic::cmpxchg_ptr(new_top, Universe::heap()->top_addr(), compare_to) != compare_to) {
2209 goto retry;
2210 }
2211 result = (oop) compare_to;
2212 }
2213 }
2214 #endif
2215 if (result != NULL) {
2216 // Initialize object (if nonzero size and need) and then the header
2217 if (need_zero ) {
2218 HeapWord* to_zero = (HeapWord*) result + sizeof(oopDesc) / oopSize;
2219 obj_size -= sizeof(oopDesc) / oopSize;
2220 if (obj_size > 0 ) {
2221 memset(to_zero, 0, obj_size * HeapWordSize);
2222 }
2223 }
2224 if (UseBiasedLocking) {
2225 result->set_mark(ik->prototype_header());
2226 } else {
2227 result->set_mark(markOopDesc::prototype());
2228 }
2229 result->set_klass_gap(0);
2230 result->set_klass(k_entry);
2231 // Must prevent reordering of stores for object initialization
2232 // with stores that publish the new object.
2233 OrderAccess::storestore();
2234 SET_STACK_OBJECT(result, 0);
2235 UPDATE_PC_AND_TOS_AND_CONTINUE(3, 1);
2236 }
2237 }
2238 }
2239 // Slow case allocation
2240 CALL_VM(InterpreterRuntime::_new(THREAD, METHOD->constants(), index),
2241 handle_exception);
2242 // Must prevent reordering of stores for object initialization
2243 // with stores that publish the new object.
2244 OrderAccess::storestore();
2245 SET_STACK_OBJECT(THREAD->vm_result(), 0);
2246 THREAD->set_vm_result(NULL);
2247 UPDATE_PC_AND_TOS_AND_CONTINUE(3, 1);
2248 }
2249 CASE(_anewarray): {
2250 u2 index = Bytes::get_Java_u2(pc+1);
2251 jint size = STACK_INT(-1);
2252 CALL_VM(InterpreterRuntime::anewarray(THREAD, METHOD->constants(), index, size),
2253 handle_exception);
2254 // Must prevent reordering of stores for object initialization
2255 // with stores that publish the new object.
2256 OrderAccess::storestore();
2257 SET_STACK_OBJECT(THREAD->vm_result(), -1);
2258 THREAD->set_vm_result(NULL);
2259 UPDATE_PC_AND_CONTINUE(3);
2260 }
2261 CASE(_multianewarray): {
2262 jint dims = *(pc+3);
2263 jint size = STACK_INT(-1);
2264 // stack grows down, dimensions are up!
2265 jint *dimarray =
2266 (jint*)&topOfStack[dims * Interpreter::stackElementWords+
2267 Interpreter::stackElementWords-1];
2268 //adjust pointer to start of stack element
2269 CALL_VM(InterpreterRuntime::multianewarray(THREAD, dimarray),
2270 handle_exception);
2271 // Must prevent reordering of stores for object initialization
2272 // with stores that publish the new object.
2273 OrderAccess::storestore();
2274 SET_STACK_OBJECT(THREAD->vm_result(), -dims);
2275 THREAD->set_vm_result(NULL);
2276 UPDATE_PC_AND_TOS_AND_CONTINUE(4, -(dims-1));
2277 }
2278 CASE(_checkcast):
2279 if (STACK_OBJECT(-1) != NULL) {
2280 VERIFY_OOP(STACK_OBJECT(-1));
2281 u2 index = Bytes::get_Java_u2(pc+1);
2282 // Constant pool may have actual klass or unresolved klass. If it is
2283 // unresolved we must resolve it.
2284 if (METHOD->constants()->tag_at(index).is_unresolved_klass()) {
2285 CALL_VM(InterpreterRuntime::quicken_io_cc(THREAD), handle_exception);
2286 }
2287 Klass* klassOf = (Klass*) METHOD->constants()->slot_at(index).get_klass();
2288 Klass* objKlass = STACK_OBJECT(-1)->klass(); // ebx
2289 //
2290 // Check for compatibilty. This check must not GC!!
2291 // Seems way more expensive now that we must dispatch.
2292 //
2293 if (objKlass != klassOf && !objKlass->is_subtype_of(klassOf)) {
2294 // Decrement counter at checkcast.
2295 BI_PROFILE_SUBTYPECHECK_FAILED(objKlass);
2296 ResourceMark rm(THREAD);
2297 const char* objName = objKlass->external_name();
2298 const char* klassName = klassOf->external_name();
2299 char* message = SharedRuntime::generate_class_cast_message(
2300 objName, klassName);
2301 VM_JAVA_ERROR(vmSymbols::java_lang_ClassCastException(), message, note_classCheck_trap);
2302 }
2303 // Profile checkcast with null_seen and receiver.
2304 BI_PROFILE_UPDATE_CHECKCAST(/*null_seen=*/false, objKlass);
2305 } else {
2306 // Profile checkcast with null_seen and receiver.
2307 BI_PROFILE_UPDATE_CHECKCAST(/*null_seen=*/true, NULL);
2308 }
2309 UPDATE_PC_AND_CONTINUE(3);
2311 CASE(_instanceof):
2312 if (STACK_OBJECT(-1) == NULL) {
2313 SET_STACK_INT(0, -1);
2314 // Profile instanceof with null_seen and receiver.
2315 BI_PROFILE_UPDATE_INSTANCEOF(/*null_seen=*/true, NULL);
2316 } else {
2317 VERIFY_OOP(STACK_OBJECT(-1));
2318 u2 index = Bytes::get_Java_u2(pc+1);
2319 // Constant pool may have actual klass or unresolved klass. If it is
2320 // unresolved we must resolve it.
2321 if (METHOD->constants()->tag_at(index).is_unresolved_klass()) {
2322 CALL_VM(InterpreterRuntime::quicken_io_cc(THREAD), handle_exception);
2323 }
2324 Klass* klassOf = (Klass*) METHOD->constants()->slot_at(index).get_klass();
2325 Klass* objKlass = STACK_OBJECT(-1)->klass();
2326 //
2327 // Check for compatibilty. This check must not GC!!
2328 // Seems way more expensive now that we must dispatch.
2329 //
2330 if ( objKlass == klassOf || objKlass->is_subtype_of(klassOf)) {
2331 SET_STACK_INT(1, -1);
2332 } else {
2333 SET_STACK_INT(0, -1);
2334 // Decrement counter at checkcast.
2335 BI_PROFILE_SUBTYPECHECK_FAILED(objKlass);
2336 }
2337 // Profile instanceof with null_seen and receiver.
2338 BI_PROFILE_UPDATE_INSTANCEOF(/*null_seen=*/false, objKlass);
2339 }
2340 UPDATE_PC_AND_CONTINUE(3);
2342 CASE(_ldc_w):
2343 CASE(_ldc):
2344 {
2345 u2 index;
2346 bool wide = false;
2347 int incr = 2; // frequent case
2348 if (opcode == Bytecodes::_ldc) {
2349 index = pc[1];
2350 } else {
2351 index = Bytes::get_Java_u2(pc+1);
2352 incr = 3;
2353 wide = true;
2354 }
2356 ConstantPool* constants = METHOD->constants();
2357 switch (constants->tag_at(index).value()) {
2358 case JVM_CONSTANT_Integer:
2359 SET_STACK_INT(constants->int_at(index), 0);
2360 break;
2362 case JVM_CONSTANT_Float:
2363 SET_STACK_FLOAT(constants->float_at(index), 0);
2364 break;
2366 case JVM_CONSTANT_String:
2367 {
2368 oop result = constants->resolved_references()->obj_at(index);
2369 if (result == NULL) {
2370 CALL_VM(InterpreterRuntime::resolve_ldc(THREAD, (Bytecodes::Code) opcode), handle_exception);
2371 SET_STACK_OBJECT(THREAD->vm_result(), 0);
2372 THREAD->set_vm_result(NULL);
2373 } else {
2374 VERIFY_OOP(result);
2375 SET_STACK_OBJECT(result, 0);
2376 }
2377 break;
2378 }
2380 case JVM_CONSTANT_Class:
2381 VERIFY_OOP(constants->resolved_klass_at(index)->java_mirror());
2382 SET_STACK_OBJECT(constants->resolved_klass_at(index)->java_mirror(), 0);
2383 break;
2385 case JVM_CONSTANT_UnresolvedClass:
2386 case JVM_CONSTANT_UnresolvedClassInError:
2387 CALL_VM(InterpreterRuntime::ldc(THREAD, wide), handle_exception);
2388 SET_STACK_OBJECT(THREAD->vm_result(), 0);
2389 THREAD->set_vm_result(NULL);
2390 break;
2392 default: ShouldNotReachHere();
2393 }
2394 UPDATE_PC_AND_TOS_AND_CONTINUE(incr, 1);
2395 }
2397 CASE(_ldc2_w):
2398 {
2399 u2 index = Bytes::get_Java_u2(pc+1);
2401 ConstantPool* constants = METHOD->constants();
2402 switch (constants->tag_at(index).value()) {
2404 case JVM_CONSTANT_Long:
2405 SET_STACK_LONG(constants->long_at(index), 1);
2406 break;
2408 case JVM_CONSTANT_Double:
2409 SET_STACK_DOUBLE(constants->double_at(index), 1);
2410 break;
2411 default: ShouldNotReachHere();
2412 }
2413 UPDATE_PC_AND_TOS_AND_CONTINUE(3, 2);
2414 }
2416 CASE(_fast_aldc_w):
2417 CASE(_fast_aldc): {
2418 u2 index;
2419 int incr;
2420 if (opcode == Bytecodes::_fast_aldc) {
2421 index = pc[1];
2422 incr = 2;
2423 } else {
2424 index = Bytes::get_native_u2(pc+1);
2425 incr = 3;
2426 }
2428 // We are resolved if the f1 field contains a non-null object (CallSite, etc.)
2429 // This kind of CP cache entry does not need to match the flags byte, because
2430 // there is a 1-1 relation between bytecode type and CP entry type.
2431 ConstantPool* constants = METHOD->constants();
2432 oop result = constants->resolved_references()->obj_at(index);
2433 if (result == NULL) {
2434 CALL_VM(InterpreterRuntime::resolve_ldc(THREAD, (Bytecodes::Code) opcode),
2435 handle_exception);
2436 result = THREAD->vm_result();
2437 }
2439 VERIFY_OOP(result);
2440 SET_STACK_OBJECT(result, 0);
2441 UPDATE_PC_AND_TOS_AND_CONTINUE(incr, 1);
2442 }
2444 CASE(_invokedynamic): {
2446 if (!EnableInvokeDynamic) {
2447 // We should not encounter this bytecode if !EnableInvokeDynamic.
2448 // The verifier will stop it. However, if we get past the verifier,
2449 // this will stop the thread in a reasonable way, without crashing the JVM.
2450 CALL_VM(InterpreterRuntime::throw_IncompatibleClassChangeError(THREAD),
2451 handle_exception);
2452 ShouldNotReachHere();
2453 }
2455 u4 index = Bytes::get_native_u4(pc+1);
2456 ConstantPoolCacheEntry* cache = cp->constant_pool()->invokedynamic_cp_cache_entry_at(index);
2458 // We are resolved if the resolved_references field contains a non-null object (CallSite, etc.)
2459 // This kind of CP cache entry does not need to match the flags byte, because
2460 // there is a 1-1 relation between bytecode type and CP entry type.
2461 if (! cache->is_resolved((Bytecodes::Code) opcode)) {
2462 CALL_VM(InterpreterRuntime::resolve_invokedynamic(THREAD),
2463 handle_exception);
2464 cache = cp->constant_pool()->invokedynamic_cp_cache_entry_at(index);
2465 }
2467 Method* method = cache->f1_as_method();
2468 if (VerifyOops) method->verify();
2470 if (cache->has_appendix()) {
2471 ConstantPool* constants = METHOD->constants();
2472 SET_STACK_OBJECT(cache->appendix_if_resolved(constants), 0);
2473 MORE_STACK(1);
2474 }
2476 istate->set_msg(call_method);
2477 istate->set_callee(method);
2478 istate->set_callee_entry_point(method->from_interpreted_entry());
2479 istate->set_bcp_advance(5);
2481 // Invokedynamic has got a call counter, just like an invokestatic -> increment!
2482 BI_PROFILE_UPDATE_CALL();
2484 UPDATE_PC_AND_RETURN(0); // I'll be back...
2485 }
2487 CASE(_invokehandle): {
2489 if (!EnableInvokeDynamic) {
2490 ShouldNotReachHere();
2491 }
2493 u2 index = Bytes::get_native_u2(pc+1);
2494 ConstantPoolCacheEntry* cache = cp->entry_at(index);
2496 if (! cache->is_resolved((Bytecodes::Code) opcode)) {
2497 CALL_VM(InterpreterRuntime::resolve_invokehandle(THREAD),
2498 handle_exception);
2499 cache = cp->entry_at(index);
2500 }
2502 Method* method = cache->f1_as_method();
2503 if (VerifyOops) method->verify();
2505 if (cache->has_appendix()) {
2506 ConstantPool* constants = METHOD->constants();
2507 SET_STACK_OBJECT(cache->appendix_if_resolved(constants), 0);
2508 MORE_STACK(1);
2509 }
2511 istate->set_msg(call_method);
2512 istate->set_callee(method);
2513 istate->set_callee_entry_point(method->from_interpreted_entry());
2514 istate->set_bcp_advance(3);
2516 // Invokehandle has got a call counter, just like a final call -> increment!
2517 BI_PROFILE_UPDATE_FINALCALL();
2519 UPDATE_PC_AND_RETURN(0); // I'll be back...
2520 }
2522 CASE(_invokeinterface): {
2523 u2 index = Bytes::get_native_u2(pc+1);
2525 // QQQ Need to make this as inlined as possible. Probably need to split all the bytecode cases
2526 // out so c++ compiler has a chance for constant prop to fold everything possible away.
2528 ConstantPoolCacheEntry* cache = cp->entry_at(index);
2529 if (!cache->is_resolved((Bytecodes::Code)opcode)) {
2530 CALL_VM(InterpreterRuntime::resolve_invoke(THREAD, (Bytecodes::Code)opcode),
2531 handle_exception);
2532 cache = cp->entry_at(index);
2533 }
2535 istate->set_msg(call_method);
2537 // Special case of invokeinterface called for virtual method of
2538 // java.lang.Object. See cpCacheOop.cpp for details.
2539 // This code isn't produced by javac, but could be produced by
2540 // another compliant java compiler.
2541 if (cache->is_forced_virtual()) {
2542 Method* callee;
2543 CHECK_NULL(STACK_OBJECT(-(cache->parameter_size())));
2544 if (cache->is_vfinal()) {
2545 callee = cache->f2_as_vfinal_method();
2546 // Profile 'special case of invokeinterface' final call.
2547 BI_PROFILE_UPDATE_FINALCALL();
2548 } else {
2549 // Get receiver.
2550 int parms = cache->parameter_size();
2551 // Same comments as invokevirtual apply here.
2552 oop rcvr = STACK_OBJECT(-parms);
2553 VERIFY_OOP(rcvr);
2554 InstanceKlass* rcvrKlass = (InstanceKlass*)rcvr->klass();
2555 callee = (Method*) rcvrKlass->start_of_vtable()[ cache->f2_as_index()];
2556 // Profile 'special case of invokeinterface' virtual call.
2557 BI_PROFILE_UPDATE_VIRTUALCALL(rcvr->klass());
2558 }
2559 istate->set_callee(callee);
2560 istate->set_callee_entry_point(callee->from_interpreted_entry());
2561 #ifdef VM_JVMTI
2562 if (JvmtiExport::can_post_interpreter_events() && THREAD->is_interp_only_mode()) {
2563 istate->set_callee_entry_point(callee->interpreter_entry());
2564 }
2565 #endif /* VM_JVMTI */
2566 istate->set_bcp_advance(5);
2567 UPDATE_PC_AND_RETURN(0); // I'll be back...
2568 }
2570 // this could definitely be cleaned up QQQ
2571 Method* callee;
2572 Klass* iclass = cache->f1_as_klass();
2573 // InstanceKlass* interface = (InstanceKlass*) iclass;
2574 // get receiver
2575 int parms = cache->parameter_size();
2576 oop rcvr = STACK_OBJECT(-parms);
2577 CHECK_NULL(rcvr);
2578 InstanceKlass* int2 = (InstanceKlass*) rcvr->klass();
2579 itableOffsetEntry* ki = (itableOffsetEntry*) int2->start_of_itable();
2580 int i;
2581 for ( i = 0 ; i < int2->itable_length() ; i++, ki++ ) {
2582 if (ki->interface_klass() == iclass) break;
2583 }
2584 // If the interface isn't found, this class doesn't implement this
2585 // interface. The link resolver checks this but only for the first
2586 // time this interface is called.
2587 if (i == int2->itable_length()) {
2588 VM_JAVA_ERROR(vmSymbols::java_lang_IncompatibleClassChangeError(), "", note_no_trap);
2589 }
2590 int mindex = cache->f2_as_index();
2591 itableMethodEntry* im = ki->first_method_entry(rcvr->klass());
2592 callee = im[mindex].method();
2593 if (callee == NULL) {
2594 VM_JAVA_ERROR(vmSymbols::java_lang_AbstractMethodError(), "", note_no_trap);
2595 }
2597 // Profile virtual call.
2598 BI_PROFILE_UPDATE_VIRTUALCALL(rcvr->klass());
2600 istate->set_callee(callee);
2601 istate->set_callee_entry_point(callee->from_interpreted_entry());
2602 #ifdef VM_JVMTI
2603 if (JvmtiExport::can_post_interpreter_events() && THREAD->is_interp_only_mode()) {
2604 istate->set_callee_entry_point(callee->interpreter_entry());
2605 }
2606 #endif /* VM_JVMTI */
2607 istate->set_bcp_advance(5);
2608 UPDATE_PC_AND_RETURN(0); // I'll be back...
2609 }
2611 CASE(_invokevirtual):
2612 CASE(_invokespecial):
2613 CASE(_invokestatic): {
2614 u2 index = Bytes::get_native_u2(pc+1);
2616 ConstantPoolCacheEntry* cache = cp->entry_at(index);
2617 // QQQ Need to make this as inlined as possible. Probably need to split all the bytecode cases
2618 // out so c++ compiler has a chance for constant prop to fold everything possible away.
2620 if (!cache->is_resolved((Bytecodes::Code)opcode)) {
2621 CALL_VM(InterpreterRuntime::resolve_invoke(THREAD, (Bytecodes::Code)opcode),
2622 handle_exception);
2623 cache = cp->entry_at(index);
2624 }
2626 istate->set_msg(call_method);
2627 {
2628 Method* callee;
2629 if ((Bytecodes::Code)opcode == Bytecodes::_invokevirtual) {
2630 CHECK_NULL(STACK_OBJECT(-(cache->parameter_size())));
2631 if (cache->is_vfinal()) {
2632 callee = cache->f2_as_vfinal_method();
2633 // Profile final call.
2634 BI_PROFILE_UPDATE_FINALCALL();
2635 } else {
2636 // get receiver
2637 int parms = cache->parameter_size();
2638 // this works but needs a resourcemark and seems to create a vtable on every call:
2639 // Method* callee = rcvr->klass()->vtable()->method_at(cache->f2_as_index());
2640 //
2641 // this fails with an assert
2642 // InstanceKlass* rcvrKlass = InstanceKlass::cast(STACK_OBJECT(-parms)->klass());
2643 // but this works
2644 oop rcvr = STACK_OBJECT(-parms);
2645 VERIFY_OOP(rcvr);
2646 InstanceKlass* rcvrKlass = (InstanceKlass*)rcvr->klass();
2647 /*
2648 Executing this code in java.lang.String:
2649 public String(char value[]) {
2650 this.count = value.length;
2651 this.value = (char[])value.clone();
2652 }
2654 a find on rcvr->klass() reports:
2655 {type array char}{type array class}
2656 - klass: {other class}
2658 but using InstanceKlass::cast(STACK_OBJECT(-parms)->klass()) causes in assertion failure
2659 because rcvr->klass()->oop_is_instance() == 0
2660 However it seems to have a vtable in the right location. Huh?
2662 */
2663 callee = (Method*) rcvrKlass->start_of_vtable()[ cache->f2_as_index()];
2664 // Profile virtual call.
2665 BI_PROFILE_UPDATE_VIRTUALCALL(rcvr->klass());
2666 }
2667 } else {
2668 if ((Bytecodes::Code)opcode == Bytecodes::_invokespecial) {
2669 CHECK_NULL(STACK_OBJECT(-(cache->parameter_size())));
2670 }
2671 callee = cache->f1_as_method();
2673 // Profile call.
2674 BI_PROFILE_UPDATE_CALL();
2675 }
2677 istate->set_callee(callee);
2678 istate->set_callee_entry_point(callee->from_interpreted_entry());
2679 #ifdef VM_JVMTI
2680 if (JvmtiExport::can_post_interpreter_events() && THREAD->is_interp_only_mode()) {
2681 istate->set_callee_entry_point(callee->interpreter_entry());
2682 }
2683 #endif /* VM_JVMTI */
2684 istate->set_bcp_advance(3);
2685 UPDATE_PC_AND_RETURN(0); // I'll be back...
2686 }
2687 }
2689 /* Allocate memory for a new java object. */
2691 CASE(_newarray): {
2692 BasicType atype = (BasicType) *(pc+1);
2693 jint size = STACK_INT(-1);
2694 CALL_VM(InterpreterRuntime::newarray(THREAD, atype, size),
2695 handle_exception);
2696 // Must prevent reordering of stores for object initialization
2697 // with stores that publish the new object.
2698 OrderAccess::storestore();
2699 SET_STACK_OBJECT(THREAD->vm_result(), -1);
2700 THREAD->set_vm_result(NULL);
2702 UPDATE_PC_AND_CONTINUE(2);
2703 }
2705 /* Throw an exception. */
2707 CASE(_athrow): {
2708 oop except_oop = STACK_OBJECT(-1);
2709 CHECK_NULL(except_oop);
2710 // set pending_exception so we use common code
2711 THREAD->set_pending_exception(except_oop, NULL, 0);
2712 goto handle_exception;
2713 }
2715 /* goto and jsr. They are exactly the same except jsr pushes
2716 * the address of the next instruction first.
2717 */
2719 CASE(_jsr): {
2720 /* push bytecode index on stack */
2721 SET_STACK_ADDR(((address)pc - (intptr_t)(istate->method()->code_base()) + 3), 0);
2722 MORE_STACK(1);
2723 /* FALL THROUGH */
2724 }
2726 CASE(_goto):
2727 {
2728 int16_t offset = (int16_t)Bytes::get_Java_u2(pc + 1);
2729 // Profile jump.
2730 BI_PROFILE_UPDATE_JUMP();
2731 address branch_pc = pc;
2732 UPDATE_PC(offset);
2733 DO_BACKEDGE_CHECKS(offset, branch_pc);
2734 CONTINUE;
2735 }
2737 CASE(_jsr_w): {
2738 /* push return address on the stack */
2739 SET_STACK_ADDR(((address)pc - (intptr_t)(istate->method()->code_base()) + 5), 0);
2740 MORE_STACK(1);
2741 /* FALL THROUGH */
2742 }
2744 CASE(_goto_w):
2745 {
2746 int32_t offset = Bytes::get_Java_u4(pc + 1);
2747 // Profile jump.
2748 BI_PROFILE_UPDATE_JUMP();
2749 address branch_pc = pc;
2750 UPDATE_PC(offset);
2751 DO_BACKEDGE_CHECKS(offset, branch_pc);
2752 CONTINUE;
2753 }
2755 /* return from a jsr or jsr_w */
2757 CASE(_ret): {
2758 // Profile ret.
2759 BI_PROFILE_UPDATE_RET(/*bci=*/((int)(intptr_t)(LOCALS_ADDR(pc[1]))));
2760 // Now, update the pc.
2761 pc = istate->method()->code_base() + (intptr_t)(LOCALS_ADDR(pc[1]));
2762 UPDATE_PC_AND_CONTINUE(0);
2763 }
2765 /* debugger breakpoint */
2767 CASE(_breakpoint): {
2768 Bytecodes::Code original_bytecode;
2769 DECACHE_STATE();
2770 SET_LAST_JAVA_FRAME();
2771 original_bytecode = InterpreterRuntime::get_original_bytecode_at(THREAD,
2772 METHOD, pc);
2773 RESET_LAST_JAVA_FRAME();
2774 CACHE_STATE();
2775 if (THREAD->has_pending_exception()) goto handle_exception;
2776 CALL_VM(InterpreterRuntime::_breakpoint(THREAD, METHOD, pc),
2777 handle_exception);
2779 opcode = (jubyte)original_bytecode;
2780 goto opcode_switch;
2781 }
2783 DEFAULT:
2784 fatal(err_msg("Unimplemented opcode %d = %s", opcode,
2785 Bytecodes::name((Bytecodes::Code)opcode)));
2786 goto finish;
2788 } /* switch(opc) */
2791 #ifdef USELABELS
2792 check_for_exception:
2793 #endif
2794 {
2795 if (!THREAD->has_pending_exception()) {
2796 CONTINUE;
2797 }
2798 /* We will be gcsafe soon, so flush our state. */
2799 DECACHE_PC();
2800 goto handle_exception;
2801 }
2802 do_continue: ;
2804 } /* while (1) interpreter loop */
2807 // An exception exists in the thread state see whether this activation can handle it
2808 handle_exception: {
2810 HandleMarkCleaner __hmc(THREAD);
2811 Handle except_oop(THREAD, THREAD->pending_exception());
2812 // Prevent any subsequent HandleMarkCleaner in the VM
2813 // from freeing the except_oop handle.
2814 HandleMark __hm(THREAD);
2816 THREAD->clear_pending_exception();
2817 assert(except_oop(), "No exception to process");
2818 intptr_t continuation_bci;
2819 // expression stack is emptied
2820 topOfStack = istate->stack_base() - Interpreter::stackElementWords;
2821 CALL_VM(continuation_bci = (intptr_t)InterpreterRuntime::exception_handler_for_exception(THREAD, except_oop()),
2822 handle_exception);
2824 except_oop = THREAD->vm_result();
2825 THREAD->set_vm_result(NULL);
2826 if (continuation_bci >= 0) {
2827 // Place exception on top of stack
2828 SET_STACK_OBJECT(except_oop(), 0);
2829 MORE_STACK(1);
2830 pc = METHOD->code_base() + continuation_bci;
2831 if (TraceExceptions) {
2832 ttyLocker ttyl;
2833 ResourceMark rm;
2834 tty->print_cr("Exception <%s> (" INTPTR_FORMAT ")", except_oop->print_value_string(), p2i(except_oop()));
2835 tty->print_cr(" thrown in interpreter method <%s>", METHOD->print_value_string());
2836 tty->print_cr(" at bci %d, continuing at %d for thread " INTPTR_FORMAT,
2837 (int)(istate->bcp() - METHOD->code_base()),
2838 (int)continuation_bci, p2i(THREAD));
2839 }
2840 // for AbortVMOnException flag
2841 NOT_PRODUCT(Exceptions::debug_check_abort(except_oop));
2843 // Update profiling data.
2844 BI_PROFILE_ALIGN_TO_CURRENT_BCI();
2845 goto run;
2846 }
2847 if (TraceExceptions) {
2848 ttyLocker ttyl;
2849 ResourceMark rm;
2850 tty->print_cr("Exception <%s> (" INTPTR_FORMAT ")", except_oop->print_value_string(), p2i(except_oop()));
2851 tty->print_cr(" thrown in interpreter method <%s>", METHOD->print_value_string());
2852 tty->print_cr(" at bci %d, unwinding for thread " INTPTR_FORMAT,
2853 (int)(istate->bcp() - METHOD->code_base()),
2854 p2i(THREAD));
2855 }
2856 // for AbortVMOnException flag
2857 NOT_PRODUCT(Exceptions::debug_check_abort(except_oop));
2858 // No handler in this activation, unwind and try again
2859 THREAD->set_pending_exception(except_oop(), NULL, 0);
2860 goto handle_return;
2861 } // handle_exception:
2863 // Return from an interpreter invocation with the result of the interpretation
2864 // on the top of the Java Stack (or a pending exception)
2866 handle_Pop_Frame: {
2868 // We don't really do anything special here except we must be aware
2869 // that we can get here without ever locking the method (if sync).
2870 // Also we skip the notification of the exit.
2872 istate->set_msg(popping_frame);
2873 // Clear pending so while the pop is in process
2874 // we don't start another one if a call_vm is done.
2875 THREAD->clr_pop_frame_pending();
2876 // Let interpreter (only) see the we're in the process of popping a frame
2877 THREAD->set_pop_frame_in_process();
2879 goto handle_return;
2881 } // handle_Pop_Frame
2883 // ForceEarlyReturn ends a method, and returns to the caller with a return value
2884 // given by the invoker of the early return.
2885 handle_Early_Return: {
2887 istate->set_msg(early_return);
2889 // Clear expression stack.
2890 topOfStack = istate->stack_base() - Interpreter::stackElementWords;
2892 JvmtiThreadState *ts = THREAD->jvmti_thread_state();
2894 // Push the value to be returned.
2895 switch (istate->method()->result_type()) {
2896 case T_BOOLEAN:
2897 case T_SHORT:
2898 case T_BYTE:
2899 case T_CHAR:
2900 case T_INT:
2901 SET_STACK_INT(ts->earlyret_value().i, 0);
2902 MORE_STACK(1);
2903 break;
2904 case T_LONG:
2905 SET_STACK_LONG(ts->earlyret_value().j, 1);
2906 MORE_STACK(2);
2907 break;
2908 case T_FLOAT:
2909 SET_STACK_FLOAT(ts->earlyret_value().f, 0);
2910 MORE_STACK(1);
2911 break;
2912 case T_DOUBLE:
2913 SET_STACK_DOUBLE(ts->earlyret_value().d, 1);
2914 MORE_STACK(2);
2915 break;
2916 case T_ARRAY:
2917 case T_OBJECT:
2918 SET_STACK_OBJECT(ts->earlyret_oop(), 0);
2919 MORE_STACK(1);
2920 break;
2921 }
2923 ts->clr_earlyret_value();
2924 ts->set_earlyret_oop(NULL);
2925 ts->clr_earlyret_pending();
2927 // Fall through to handle_return.
2929 } // handle_Early_Return
2931 handle_return: {
2932 // A storestore barrier is required to order initialization of
2933 // final fields with publishing the reference to the object that
2934 // holds the field. Without the barrier the value of final fields
2935 // can be observed to change.
2936 OrderAccess::storestore();
2938 DECACHE_STATE();
2940 bool suppress_error = istate->msg() == popping_frame || istate->msg() == early_return;
2941 bool suppress_exit_event = THREAD->has_pending_exception() || istate->msg() == popping_frame;
2942 Handle original_exception(THREAD, THREAD->pending_exception());
2943 Handle illegal_state_oop(THREAD, NULL);
2945 // We'd like a HandleMark here to prevent any subsequent HandleMarkCleaner
2946 // in any following VM entries from freeing our live handles, but illegal_state_oop
2947 // isn't really allocated yet and so doesn't become live until later and
2948 // in unpredicatable places. Instead we must protect the places where we enter the
2949 // VM. It would be much simpler (and safer) if we could allocate a real handle with
2950 // a NULL oop in it and then overwrite the oop later as needed. This isn't
2951 // unfortunately isn't possible.
2953 THREAD->clear_pending_exception();
2955 //
2956 // As far as we are concerned we have returned. If we have a pending exception
2957 // that will be returned as this invocation's result. However if we get any
2958 // exception(s) while checking monitor state one of those IllegalMonitorStateExceptions
2959 // will be our final result (i.e. monitor exception trumps a pending exception).
2960 //
2962 // If we never locked the method (or really passed the point where we would have),
2963 // there is no need to unlock it (or look for other monitors), since that
2964 // could not have happened.
2966 if (THREAD->do_not_unlock()) {
2968 // Never locked, reset the flag now because obviously any caller must
2969 // have passed their point of locking for us to have gotten here.
2971 THREAD->clr_do_not_unlock();
2972 } else {
2973 // At this point we consider that we have returned. We now check that the
2974 // locks were properly block structured. If we find that they were not
2975 // used properly we will return with an illegal monitor exception.
2976 // The exception is checked by the caller not the callee since this
2977 // checking is considered to be part of the invocation and therefore
2978 // in the callers scope (JVM spec 8.13).
2979 //
2980 // Another weird thing to watch for is if the method was locked
2981 // recursively and then not exited properly. This means we must
2982 // examine all the entries in reverse time(and stack) order and
2983 // unlock as we find them. If we find the method monitor before
2984 // we are at the initial entry then we should throw an exception.
2985 // It is not clear the template based interpreter does this
2986 // correctly
2988 BasicObjectLock* base = istate->monitor_base();
2989 BasicObjectLock* end = (BasicObjectLock*) istate->stack_base();
2990 bool method_unlock_needed = METHOD->is_synchronized();
2991 // We know the initial monitor was used for the method don't check that
2992 // slot in the loop
2993 if (method_unlock_needed) base--;
2995 // Check all the monitors to see they are unlocked. Install exception if found to be locked.
2996 while (end < base) {
2997 oop lockee = end->obj();
2998 if (lockee != NULL) {
2999 BasicLock* lock = end->lock();
3000 markOop header = lock->displaced_header();
3001 end->set_obj(NULL);
3003 if (!lockee->mark()->has_bias_pattern()) {
3004 // If it isn't recursive we either must swap old header or call the runtime
3005 if (header != NULL) {
3006 if (Atomic::cmpxchg_ptr(header, lockee->mark_addr(), lock) != lock) {
3007 // restore object for the slow case
3008 end->set_obj(lockee);
3009 {
3010 // Prevent any HandleMarkCleaner from freeing our live handles
3011 HandleMark __hm(THREAD);
3012 CALL_VM_NOCHECK(InterpreterRuntime::monitorexit(THREAD, end));
3013 }
3014 }
3015 }
3016 }
3017 // One error is plenty
3018 if (illegal_state_oop() == NULL && !suppress_error) {
3019 {
3020 // Prevent any HandleMarkCleaner from freeing our live handles
3021 HandleMark __hm(THREAD);
3022 CALL_VM_NOCHECK(InterpreterRuntime::throw_illegal_monitor_state_exception(THREAD));
3023 }
3024 assert(THREAD->has_pending_exception(), "Lost our exception!");
3025 illegal_state_oop = THREAD->pending_exception();
3026 THREAD->clear_pending_exception();
3027 }
3028 }
3029 end++;
3030 }
3031 // Unlock the method if needed
3032 if (method_unlock_needed) {
3033 if (base->obj() == NULL) {
3034 // The method is already unlocked this is not good.
3035 if (illegal_state_oop() == NULL && !suppress_error) {
3036 {
3037 // Prevent any HandleMarkCleaner from freeing our live handles
3038 HandleMark __hm(THREAD);
3039 CALL_VM_NOCHECK(InterpreterRuntime::throw_illegal_monitor_state_exception(THREAD));
3040 }
3041 assert(THREAD->has_pending_exception(), "Lost our exception!");
3042 illegal_state_oop = THREAD->pending_exception();
3043 THREAD->clear_pending_exception();
3044 }
3045 } else {
3046 //
3047 // The initial monitor is always used for the method
3048 // However if that slot is no longer the oop for the method it was unlocked
3049 // and reused by something that wasn't unlocked!
3050 //
3051 // deopt can come in with rcvr dead because c2 knows
3052 // its value is preserved in the monitor. So we can't use locals[0] at all
3053 // and must use first monitor slot.
3054 //
3055 oop rcvr = base->obj();
3056 if (rcvr == NULL) {
3057 if (!suppress_error) {
3058 VM_JAVA_ERROR_NO_JUMP(vmSymbols::java_lang_NullPointerException(), "", note_nullCheck_trap);
3059 illegal_state_oop = THREAD->pending_exception();
3060 THREAD->clear_pending_exception();
3061 }
3062 } else if (UseHeavyMonitors) {
3063 {
3064 // Prevent any HandleMarkCleaner from freeing our live handles.
3065 HandleMark __hm(THREAD);
3066 CALL_VM_NOCHECK(InterpreterRuntime::monitorexit(THREAD, base));
3067 }
3068 if (THREAD->has_pending_exception()) {
3069 if (!suppress_error) illegal_state_oop = THREAD->pending_exception();
3070 THREAD->clear_pending_exception();
3071 }
3072 } else {
3073 BasicLock* lock = base->lock();
3074 markOop header = lock->displaced_header();
3075 base->set_obj(NULL);
3077 if (!rcvr->mark()->has_bias_pattern()) {
3078 base->set_obj(NULL);
3079 // If it isn't recursive we either must swap old header or call the runtime
3080 if (header != NULL) {
3081 if (Atomic::cmpxchg_ptr(header, rcvr->mark_addr(), lock) != lock) {
3082 // restore object for the slow case
3083 base->set_obj(rcvr);
3084 {
3085 // Prevent any HandleMarkCleaner from freeing our live handles
3086 HandleMark __hm(THREAD);
3087 CALL_VM_NOCHECK(InterpreterRuntime::monitorexit(THREAD, base));
3088 }
3089 if (THREAD->has_pending_exception()) {
3090 if (!suppress_error) illegal_state_oop = THREAD->pending_exception();
3091 THREAD->clear_pending_exception();
3092 }
3093 }
3094 }
3095 }
3096 }
3097 }
3098 }
3099 }
3100 // Clear the do_not_unlock flag now.
3101 THREAD->clr_do_not_unlock();
3103 //
3104 // Notify jvmti/jvmdi
3105 //
3106 // NOTE: we do not notify a method_exit if we have a pending exception,
3107 // including an exception we generate for unlocking checks. In the former
3108 // case, JVMDI has already been notified by our call for the exception handler
3109 // and in both cases as far as JVMDI is concerned we have already returned.
3110 // If we notify it again JVMDI will be all confused about how many frames
3111 // are still on the stack (4340444).
3112 //
3113 // NOTE Further! It turns out the the JVMTI spec in fact expects to see
3114 // method_exit events whenever we leave an activation unless it was done
3115 // for popframe. This is nothing like jvmdi. However we are passing the
3116 // tests at the moment (apparently because they are jvmdi based) so rather
3117 // than change this code and possibly fail tests we will leave it alone
3118 // (with this note) in anticipation of changing the vm and the tests
3119 // simultaneously.
3122 //
3123 suppress_exit_event = suppress_exit_event || illegal_state_oop() != NULL;
3127 #ifdef VM_JVMTI
3128 if (_jvmti_interp_events) {
3129 // Whenever JVMTI puts a thread in interp_only_mode, method
3130 // entry/exit events are sent for that thread to track stack depth.
3131 if ( !suppress_exit_event && THREAD->is_interp_only_mode() ) {
3132 {
3133 // Prevent any HandleMarkCleaner from freeing our live handles
3134 HandleMark __hm(THREAD);
3135 CALL_VM_NOCHECK(InterpreterRuntime::post_method_exit(THREAD));
3136 }
3137 }
3138 }
3139 #endif /* VM_JVMTI */
3141 //
3142 // See if we are returning any exception
3143 // A pending exception that was pending prior to a possible popping frame
3144 // overrides the popping frame.
3145 //
3146 assert(!suppress_error || (suppress_error && illegal_state_oop() == NULL), "Error was not suppressed");
3147 if (illegal_state_oop() != NULL || original_exception() != NULL) {
3148 // Inform the frame manager we have no result.
3149 istate->set_msg(throwing_exception);
3150 if (illegal_state_oop() != NULL)
3151 THREAD->set_pending_exception(illegal_state_oop(), NULL, 0);
3152 else
3153 THREAD->set_pending_exception(original_exception(), NULL, 0);
3154 UPDATE_PC_AND_RETURN(0);
3155 }
3157 if (istate->msg() == popping_frame) {
3158 // Make it simpler on the assembly code and set the message for the frame pop.
3159 // returns
3160 if (istate->prev() == NULL) {
3161 // We must be returning to a deoptimized frame (because popframe only happens between
3162 // two interpreted frames). We need to save the current arguments in C heap so that
3163 // the deoptimized frame when it restarts can copy the arguments to its expression
3164 // stack and re-execute the call. We also have to notify deoptimization that this
3165 // has occurred and to pick the preserved args copy them to the deoptimized frame's
3166 // java expression stack. Yuck.
3167 //
3168 THREAD->popframe_preserve_args(in_ByteSize(METHOD->size_of_parameters() * wordSize),
3169 LOCALS_SLOT(METHOD->size_of_parameters() - 1));
3170 THREAD->set_popframe_condition_bit(JavaThread::popframe_force_deopt_reexecution_bit);
3171 }
3172 } else {
3173 istate->set_msg(return_from_method);
3174 }
3176 // Normal return
3177 // Advance the pc and return to frame manager
3178 UPDATE_PC_AND_RETURN(1);
3179 } /* handle_return: */
3181 // This is really a fatal error return
3183 finish:
3184 DECACHE_TOS();
3185 DECACHE_PC();
3187 return;
3188 }
3190 /*
3191 * All the code following this point is only produced once and is not present
3192 * in the JVMTI version of the interpreter
3193 */
3195 #ifndef VM_JVMTI
3197 // This constructor should only be used to contruct the object to signal
3198 // interpreter initialization. All other instances should be created by
3199 // the frame manager.
3200 BytecodeInterpreter::BytecodeInterpreter(messages msg) {
3201 if (msg != initialize) ShouldNotReachHere();
3202 _msg = msg;
3203 _self_link = this;
3204 _prev_link = NULL;
3205 }
3207 // Inline static functions for Java Stack and Local manipulation
3209 // The implementations are platform dependent. We have to worry about alignment
3210 // issues on some machines which can change on the same platform depending on
3211 // whether it is an LP64 machine also.
3212 address BytecodeInterpreter::stack_slot(intptr_t *tos, int offset) {
3213 return (address) tos[Interpreter::expr_index_at(-offset)];
3214 }
3216 jint BytecodeInterpreter::stack_int(intptr_t *tos, int offset) {
3217 return *((jint*) &tos[Interpreter::expr_index_at(-offset)]);
3218 }
3220 jfloat BytecodeInterpreter::stack_float(intptr_t *tos, int offset) {
3221 return *((jfloat *) &tos[Interpreter::expr_index_at(-offset)]);
3222 }
3224 oop BytecodeInterpreter::stack_object(intptr_t *tos, int offset) {
3225 return cast_to_oop(tos [Interpreter::expr_index_at(-offset)]);
3226 }
3228 jdouble BytecodeInterpreter::stack_double(intptr_t *tos, int offset) {
3229 return ((VMJavaVal64*) &tos[Interpreter::expr_index_at(-offset)])->d;
3230 }
3232 jlong BytecodeInterpreter::stack_long(intptr_t *tos, int offset) {
3233 return ((VMJavaVal64 *) &tos[Interpreter::expr_index_at(-offset)])->l;
3234 }
3236 // only used for value types
3237 void BytecodeInterpreter::set_stack_slot(intptr_t *tos, address value,
3238 int offset) {
3239 *((address *)&tos[Interpreter::expr_index_at(-offset)]) = value;
3240 }
3242 void BytecodeInterpreter::set_stack_int(intptr_t *tos, int value,
3243 int offset) {
3244 *((jint *)&tos[Interpreter::expr_index_at(-offset)]) = value;
3245 }
3247 void BytecodeInterpreter::set_stack_float(intptr_t *tos, jfloat value,
3248 int offset) {
3249 *((jfloat *)&tos[Interpreter::expr_index_at(-offset)]) = value;
3250 }
3252 void BytecodeInterpreter::set_stack_object(intptr_t *tos, oop value,
3253 int offset) {
3254 *((oop *)&tos[Interpreter::expr_index_at(-offset)]) = value;
3255 }
3257 // needs to be platform dep for the 32 bit platforms.
3258 void BytecodeInterpreter::set_stack_double(intptr_t *tos, jdouble value,
3259 int offset) {
3260 ((VMJavaVal64*)&tos[Interpreter::expr_index_at(-offset)])->d = value;
3261 }
3263 void BytecodeInterpreter::set_stack_double_from_addr(intptr_t *tos,
3264 address addr, int offset) {
3265 (((VMJavaVal64*)&tos[Interpreter::expr_index_at(-offset)])->d =
3266 ((VMJavaVal64*)addr)->d);
3267 }
3269 void BytecodeInterpreter::set_stack_long(intptr_t *tos, jlong value,
3270 int offset) {
3271 ((VMJavaVal64*)&tos[Interpreter::expr_index_at(-offset+1)])->l = 0xdeedbeeb;
3272 ((VMJavaVal64*)&tos[Interpreter::expr_index_at(-offset)])->l = value;
3273 }
3275 void BytecodeInterpreter::set_stack_long_from_addr(intptr_t *tos,
3276 address addr, int offset) {
3277 ((VMJavaVal64*)&tos[Interpreter::expr_index_at(-offset+1)])->l = 0xdeedbeeb;
3278 ((VMJavaVal64*)&tos[Interpreter::expr_index_at(-offset)])->l =
3279 ((VMJavaVal64*)addr)->l;
3280 }
3282 // Locals
3284 address BytecodeInterpreter::locals_slot(intptr_t* locals, int offset) {
3285 return (address)locals[Interpreter::local_index_at(-offset)];
3286 }
3287 jint BytecodeInterpreter::locals_int(intptr_t* locals, int offset) {
3288 return (jint)locals[Interpreter::local_index_at(-offset)];
3289 }
3290 jfloat BytecodeInterpreter::locals_float(intptr_t* locals, int offset) {
3291 return (jfloat)locals[Interpreter::local_index_at(-offset)];
3292 }
3293 oop BytecodeInterpreter::locals_object(intptr_t* locals, int offset) {
3294 return cast_to_oop(locals[Interpreter::local_index_at(-offset)]);
3295 }
3296 jdouble BytecodeInterpreter::locals_double(intptr_t* locals, int offset) {
3297 return ((VMJavaVal64*)&locals[Interpreter::local_index_at(-(offset+1))])->d;
3298 }
3299 jlong BytecodeInterpreter::locals_long(intptr_t* locals, int offset) {
3300 return ((VMJavaVal64*)&locals[Interpreter::local_index_at(-(offset+1))])->l;
3301 }
3303 // Returns the address of locals value.
3304 address BytecodeInterpreter::locals_long_at(intptr_t* locals, int offset) {
3305 return ((address)&locals[Interpreter::local_index_at(-(offset+1))]);
3306 }
3307 address BytecodeInterpreter::locals_double_at(intptr_t* locals, int offset) {
3308 return ((address)&locals[Interpreter::local_index_at(-(offset+1))]);
3309 }
3311 // Used for local value or returnAddress
3312 void BytecodeInterpreter::set_locals_slot(intptr_t *locals,
3313 address value, int offset) {
3314 *((address*)&locals[Interpreter::local_index_at(-offset)]) = value;
3315 }
3316 void BytecodeInterpreter::set_locals_int(intptr_t *locals,
3317 jint value, int offset) {
3318 *((jint *)&locals[Interpreter::local_index_at(-offset)]) = value;
3319 }
3320 void BytecodeInterpreter::set_locals_float(intptr_t *locals,
3321 jfloat value, int offset) {
3322 *((jfloat *)&locals[Interpreter::local_index_at(-offset)]) = value;
3323 }
3324 void BytecodeInterpreter::set_locals_object(intptr_t *locals,
3325 oop value, int offset) {
3326 *((oop *)&locals[Interpreter::local_index_at(-offset)]) = value;
3327 }
3328 void BytecodeInterpreter::set_locals_double(intptr_t *locals,
3329 jdouble value, int offset) {
3330 ((VMJavaVal64*)&locals[Interpreter::local_index_at(-(offset+1))])->d = value;
3331 }
3332 void BytecodeInterpreter::set_locals_long(intptr_t *locals,
3333 jlong value, int offset) {
3334 ((VMJavaVal64*)&locals[Interpreter::local_index_at(-(offset+1))])->l = value;
3335 }
3336 void BytecodeInterpreter::set_locals_double_from_addr(intptr_t *locals,
3337 address addr, int offset) {
3338 ((VMJavaVal64*)&locals[Interpreter::local_index_at(-(offset+1))])->d = ((VMJavaVal64*)addr)->d;
3339 }
3340 void BytecodeInterpreter::set_locals_long_from_addr(intptr_t *locals,
3341 address addr, int offset) {
3342 ((VMJavaVal64*)&locals[Interpreter::local_index_at(-(offset+1))])->l = ((VMJavaVal64*)addr)->l;
3343 }
3345 void BytecodeInterpreter::astore(intptr_t* tos, int stack_offset,
3346 intptr_t* locals, int locals_offset) {
3347 intptr_t value = tos[Interpreter::expr_index_at(-stack_offset)];
3348 locals[Interpreter::local_index_at(-locals_offset)] = value;
3349 }
3352 void BytecodeInterpreter::copy_stack_slot(intptr_t *tos, int from_offset,
3353 int to_offset) {
3354 tos[Interpreter::expr_index_at(-to_offset)] =
3355 (intptr_t)tos[Interpreter::expr_index_at(-from_offset)];
3356 }
3358 void BytecodeInterpreter::dup(intptr_t *tos) {
3359 copy_stack_slot(tos, -1, 0);
3360 }
3361 void BytecodeInterpreter::dup2(intptr_t *tos) {
3362 copy_stack_slot(tos, -2, 0);
3363 copy_stack_slot(tos, -1, 1);
3364 }
3366 void BytecodeInterpreter::dup_x1(intptr_t *tos) {
3367 /* insert top word two down */
3368 copy_stack_slot(tos, -1, 0);
3369 copy_stack_slot(tos, -2, -1);
3370 copy_stack_slot(tos, 0, -2);
3371 }
3373 void BytecodeInterpreter::dup_x2(intptr_t *tos) {
3374 /* insert top word three down */
3375 copy_stack_slot(tos, -1, 0);
3376 copy_stack_slot(tos, -2, -1);
3377 copy_stack_slot(tos, -3, -2);
3378 copy_stack_slot(tos, 0, -3);
3379 }
3380 void BytecodeInterpreter::dup2_x1(intptr_t *tos) {
3381 /* insert top 2 slots three down */
3382 copy_stack_slot(tos, -1, 1);
3383 copy_stack_slot(tos, -2, 0);
3384 copy_stack_slot(tos, -3, -1);
3385 copy_stack_slot(tos, 1, -2);
3386 copy_stack_slot(tos, 0, -3);
3387 }
3388 void BytecodeInterpreter::dup2_x2(intptr_t *tos) {
3389 /* insert top 2 slots four down */
3390 copy_stack_slot(tos, -1, 1);
3391 copy_stack_slot(tos, -2, 0);
3392 copy_stack_slot(tos, -3, -1);
3393 copy_stack_slot(tos, -4, -2);
3394 copy_stack_slot(tos, 1, -3);
3395 copy_stack_slot(tos, 0, -4);
3396 }
3399 void BytecodeInterpreter::swap(intptr_t *tos) {
3400 // swap top two elements
3401 intptr_t val = tos[Interpreter::expr_index_at(1)];
3402 // Copy -2 entry to -1
3403 copy_stack_slot(tos, -2, -1);
3404 // Store saved -1 entry into -2
3405 tos[Interpreter::expr_index_at(2)] = val;
3406 }
3407 // --------------------------------------------------------------------------------
3408 // Non-product code
3409 #ifndef PRODUCT
3411 const char* BytecodeInterpreter::C_msg(BytecodeInterpreter::messages msg) {
3412 switch (msg) {
3413 case BytecodeInterpreter::no_request: return("no_request");
3414 case BytecodeInterpreter::initialize: return("initialize");
3415 // status message to C++ interpreter
3416 case BytecodeInterpreter::method_entry: return("method_entry");
3417 case BytecodeInterpreter::method_resume: return("method_resume");
3418 case BytecodeInterpreter::got_monitors: return("got_monitors");
3419 case BytecodeInterpreter::rethrow_exception: return("rethrow_exception");
3420 // requests to frame manager from C++ interpreter
3421 case BytecodeInterpreter::call_method: return("call_method");
3422 case BytecodeInterpreter::return_from_method: return("return_from_method");
3423 case BytecodeInterpreter::more_monitors: return("more_monitors");
3424 case BytecodeInterpreter::throwing_exception: return("throwing_exception");
3425 case BytecodeInterpreter::popping_frame: return("popping_frame");
3426 case BytecodeInterpreter::do_osr: return("do_osr");
3427 // deopt
3428 case BytecodeInterpreter::deopt_resume: return("deopt_resume");
3429 case BytecodeInterpreter::deopt_resume2: return("deopt_resume2");
3430 default: return("BAD MSG");
3431 }
3432 }
3433 void
3434 BytecodeInterpreter::print() {
3435 tty->print_cr("thread: " INTPTR_FORMAT, (uintptr_t) this->_thread);
3436 tty->print_cr("bcp: " INTPTR_FORMAT, (uintptr_t) this->_bcp);
3437 tty->print_cr("locals: " INTPTR_FORMAT, (uintptr_t) this->_locals);
3438 tty->print_cr("constants: " INTPTR_FORMAT, (uintptr_t) this->_constants);
3439 {
3440 ResourceMark rm;
3441 char *method_name = _method->name_and_sig_as_C_string();
3442 tty->print_cr("method: " INTPTR_FORMAT "[ %s ]", (uintptr_t) this->_method, method_name);
3443 }
3444 tty->print_cr("mdx: " INTPTR_FORMAT, (uintptr_t) this->_mdx);
3445 tty->print_cr("stack: " INTPTR_FORMAT, (uintptr_t) this->_stack);
3446 tty->print_cr("msg: %s", C_msg(this->_msg));
3447 tty->print_cr("result_to_call._callee: " INTPTR_FORMAT, (uintptr_t) this->_result._to_call._callee);
3448 tty->print_cr("result_to_call._callee_entry_point: " INTPTR_FORMAT, (uintptr_t) this->_result._to_call._callee_entry_point);
3449 tty->print_cr("result_to_call._bcp_advance: %d ", this->_result._to_call._bcp_advance);
3450 tty->print_cr("osr._osr_buf: " INTPTR_FORMAT, (uintptr_t) this->_result._osr._osr_buf);
3451 tty->print_cr("osr._osr_entry: " INTPTR_FORMAT, (uintptr_t) this->_result._osr._osr_entry);
3452 tty->print_cr("prev_link: " INTPTR_FORMAT, (uintptr_t) this->_prev_link);
3453 tty->print_cr("native_mirror: " INTPTR_FORMAT, (uintptr_t) p2i(this->_oop_temp));
3454 tty->print_cr("stack_base: " INTPTR_FORMAT, (uintptr_t) this->_stack_base);
3455 tty->print_cr("stack_limit: " INTPTR_FORMAT, (uintptr_t) this->_stack_limit);
3456 tty->print_cr("monitor_base: " INTPTR_FORMAT, (uintptr_t) this->_monitor_base);
3457 #ifdef SPARC
3458 tty->print_cr("last_Java_pc: " INTPTR_FORMAT, (uintptr_t) this->_last_Java_pc);
3459 tty->print_cr("frame_bottom: " INTPTR_FORMAT, (uintptr_t) this->_frame_bottom);
3460 tty->print_cr("&native_fresult: " INTPTR_FORMAT, (uintptr_t) &this->_native_fresult);
3461 tty->print_cr("native_lresult: " INTPTR_FORMAT, (uintptr_t) this->_native_lresult);
3462 #endif
3463 #if !defined(ZERO)
3464 tty->print_cr("last_Java_fp: " INTPTR_FORMAT, (uintptr_t) this->_last_Java_fp);
3465 #endif // !ZERO
3466 tty->print_cr("self_link: " INTPTR_FORMAT, (uintptr_t) this->_self_link);
3467 }
3469 extern "C" {
3470 void PI(uintptr_t arg) {
3471 ((BytecodeInterpreter*)arg)->print();
3472 }
3473 }
3474 #endif // PRODUCT
3476 #endif // JVMTI
3477 #endif // CC_INTERP
