1 /*
2 * Copyright (c) 1997, 2015, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
23 */
24
25 #include "precompiled.hpp"
26 #include "asm/macroAssembler.hpp"
27 #include "interpreter/bytecodeHistogram.hpp"
28 #include "interpreter/interpreter.hpp"
29 #include "interpreter/interpreterGenerator.hpp"
30 #include "interpreter/interpreterRuntime.hpp"
31 #include "interpreter/interp_masm.hpp"
32 #include "interpreter/templateTable.hpp"
33 #include "oops/arrayOop.hpp"
34 #include "oops/methodData.hpp"
35 #include "oops/method.hpp"
36 #include "oops/oop.inline.hpp"
37 #include "prims/jvmtiExport.hpp"
38 #include "prims/jvmtiThreadState.hpp"
39 #include "runtime/arguments.hpp"
40 #include "runtime/deoptimization.hpp"
41 #include "runtime/frame.inline.hpp"
42 #include "runtime/sharedRuntime.hpp"
43 #include "runtime/stubRoutines.hpp"
44 #include "runtime/synchronizer.hpp"
45 #include "runtime/timer.hpp"
46 #include "runtime/vframeArray.hpp"
47 #include "utilities/debug.hpp"
48 #include "utilities/macros.hpp"
49
50 #define __ _masm->
51
52
53 #ifndef CC_INTERP
54 const int method_offset = frame::interpreter_frame_method_offset * wordSize;
55 const int bcp_offset = frame::interpreter_frame_bcp_offset * wordSize;
56 const int locals_offset = frame::interpreter_frame_locals_offset * wordSize;
57
58 //------------------------------------------------------------------------------------------------------------------------
59
60 address TemplateInterpreterGenerator::generate_StackOverflowError_handler() {
61 address entry = __ pc();
62
63 // Note: There should be a minimal interpreter frame set up when stack
64 // overflow occurs since we check explicitly for it now.
65 //
66 #ifdef ASSERT
67 { Label L;
68 __ lea(rax, Address(rbp,
69 frame::interpreter_frame_monitor_block_top_offset * wordSize));
70 __ cmpptr(rax, rsp); // rax, = maximal rsp for current rbp,
71 // (stack grows negative)
72 __ jcc(Assembler::aboveEqual, L); // check if frame is complete
73 __ stop ("interpreter frame not set up");
74 __ bind(L);
75 }
76 #endif // ASSERT
77 // Restore bcp under the assumption that the current frame is still
78 // interpreted
79 __ restore_bcp();
80
81 // expression stack must be empty before entering the VM if an exception
82 // happened
83 __ empty_expression_stack();
84 __ empty_FPU_stack();
85 // throw exception
86 __ call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::throw_StackOverflowError));
87 return entry;
88 }
89
90 address TemplateInterpreterGenerator::generate_ArrayIndexOutOfBounds_handler(const char* name) {
91 address entry = __ pc();
92 // expression stack must be empty before entering the VM if an exception happened
93 __ empty_expression_stack();
94 __ empty_FPU_stack();
95 // setup parameters
96 // ??? convention: expect aberrant index in register rbx,
97 __ lea(rax, ExternalAddress((address)name));
98 __ call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::throw_ArrayIndexOutOfBoundsException), rax, rbx);
99 return entry;
100 }
101
102 address TemplateInterpreterGenerator::generate_ClassCastException_handler() {
103 address entry = __ pc();
104 // object is at TOS
105 __ pop(rax);
106 // expression stack must be empty before entering the VM if an exception
107 // happened
108 __ empty_expression_stack();
109 __ empty_FPU_stack();
110 __ call_VM(noreg,
111 CAST_FROM_FN_PTR(address,
112 InterpreterRuntime::throw_ClassCastException),
113 rax);
114 return entry;
115 }
116
117 address TemplateInterpreterGenerator::generate_exception_handler_common(const char* name, const char* message, bool pass_oop) {
118 assert(!pass_oop || message == NULL, "either oop or message but not both");
119 address entry = __ pc();
120 if (pass_oop) {
121 // object is at TOS
122 __ pop(rbx);
123 }
124 // expression stack must be empty before entering the VM if an exception happened
125 __ empty_expression_stack();
126 __ empty_FPU_stack();
127 // setup parameters
128 __ lea(rax, ExternalAddress((address)name));
129 if (pass_oop) {
130 __ call_VM(rax, CAST_FROM_FN_PTR(address, InterpreterRuntime::create_klass_exception), rax, rbx);
131 } else {
132 if (message != NULL) {
133 __ lea(rbx, ExternalAddress((address)message));
134 } else {
135 __ movptr(rbx, NULL_WORD);
136 }
137 __ call_VM(rax, CAST_FROM_FN_PTR(address, InterpreterRuntime::create_exception), rax, rbx);
138 }
139 // throw exception
140 __ jump(ExternalAddress(Interpreter::throw_exception_entry()));
141 return entry;
142 }
143
144
145 address TemplateInterpreterGenerator::generate_continuation_for(TosState state) {
146 address entry = __ pc();
147 // NULL last_sp until next java call
148 __ movptr(Address(rbp, frame::interpreter_frame_last_sp_offset * wordSize), NULL_WORD);
149 __ dispatch_next(state);
150 return entry;
151 }
152
153
154 address TemplateInterpreterGenerator::generate_return_entry_for(TosState state, int step, size_t index_size) {
155 address entry = __ pc();
156
157 #ifdef COMPILER2
158 // The FPU stack is clean if UseSSE >= 2 but must be cleaned in other cases
159 if ((state == ftos && UseSSE < 1) || (state == dtos && UseSSE < 2)) {
160 for (int i = 1; i < 8; i++) {
161 __ ffree(i);
162 }
163 } else if (UseSSE < 2) {
164 __ empty_FPU_stack();
165 }
166 #endif
167 if ((state == ftos && UseSSE < 1) || (state == dtos && UseSSE < 2)) {
168 __ MacroAssembler::verify_FPU(1, "generate_return_entry_for compiled");
169 } else {
170 __ MacroAssembler::verify_FPU(0, "generate_return_entry_for compiled");
171 }
172
173 if (state == ftos) {
174 __ MacroAssembler::verify_FPU(UseSSE >= 1 ? 0 : 1, "generate_return_entry_for in interpreter");
175 } else if (state == dtos) {
176 __ MacroAssembler::verify_FPU(UseSSE >= 2 ? 0 : 1, "generate_return_entry_for in interpreter");
177 }
178
179 // Restore stack bottom in case i2c adjusted stack
180 __ movptr(rsp, Address(rbp, frame::interpreter_frame_last_sp_offset * wordSize));
181 // and NULL it as marker that rsp is now tos until next java call
182 __ movptr(Address(rbp, frame::interpreter_frame_last_sp_offset * wordSize), NULL_WORD);
183
184 __ restore_bcp();
185 __ restore_locals();
186
187 if (state == atos) {
188 Register mdp = rbx;
189 Register tmp = rcx;
190 __ profile_return_type(mdp, rax, tmp);
191 }
192
193 const Register cache = rbx;
194 const Register index = rcx;
195 __ get_cache_and_index_at_bcp(cache, index, 1, index_size);
196
197 const Register flags = cache;
198 __ movl(flags, Address(cache, index, Address::times_ptr, ConstantPoolCache::base_offset() + ConstantPoolCacheEntry::flags_offset()));
199 __ andl(flags, ConstantPoolCacheEntry::parameter_size_mask);
200 __ lea(rsp, Address(rsp, flags, Interpreter::stackElementScale()));
201 __ dispatch_next(state, step);
202
203 return entry;
204 }
205
206
207 address TemplateInterpreterGenerator::generate_deopt_entry_for(TosState state, int step) {
208 address entry = __ pc();
209
210 if (state == ftos) {
211 __ MacroAssembler::verify_FPU(UseSSE >= 1 ? 0 : 1, "generate_deopt_entry_for in interpreter");
212 } else if (state == dtos) {
213 __ MacroAssembler::verify_FPU(UseSSE >= 2 ? 0 : 1, "generate_deopt_entry_for in interpreter");
214 }
215
216 // The stack is not extended by deopt but we must NULL last_sp as this
217 // entry is like a "return".
218 __ movptr(Address(rbp, frame::interpreter_frame_last_sp_offset * wordSize), NULL_WORD);
219 __ restore_bcp();
220 __ restore_locals();
221 // handle exceptions
222 { Label L;
223 const Register thread = rcx;
224 __ get_thread(thread);
225 __ cmpptr(Address(thread, Thread::pending_exception_offset()), (int32_t)NULL_WORD);
226 __ jcc(Assembler::zero, L);
227 __ call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::throw_pending_exception));
228 __ should_not_reach_here();
229 __ bind(L);
230 }
231 __ dispatch_next(state, step);
232 return entry;
233 }
234
235
236 int AbstractInterpreter::BasicType_as_index(BasicType type) {
237 int i = 0;
238 switch (type) {
239 case T_BOOLEAN: i = 0; break;
240 case T_CHAR : i = 1; break;
241 case T_BYTE : i = 2; break;
242 case T_SHORT : i = 3; break;
243 case T_INT : // fall through
244 case T_LONG : // fall through
245 case T_VOID : i = 4; break;
246 case T_FLOAT : i = 5; break; // have to treat float and double separately for SSE
247 case T_DOUBLE : i = 6; break;
248 case T_OBJECT : // fall through
249 case T_ARRAY : i = 7; break;
250 default : ShouldNotReachHere();
251 }
252 assert(0 <= i && i < AbstractInterpreter::number_of_result_handlers, "index out of bounds");
253 return i;
254 }
255
256
257 address TemplateInterpreterGenerator::generate_result_handler_for(BasicType type) {
258 address entry = __ pc();
259 switch (type) {
260 case T_BOOLEAN: __ c2bool(rax); break;
261 case T_CHAR : __ andptr(rax, 0xFFFF); break;
262 case T_BYTE : __ sign_extend_byte (rax); break;
263 case T_SHORT : __ sign_extend_short(rax); break;
264 case T_INT : /* nothing to do */ break;
265 case T_LONG : /* nothing to do */ break;
266 case T_VOID : /* nothing to do */ break;
267 case T_DOUBLE :
268 case T_FLOAT :
269 { const Register t = InterpreterRuntime::SignatureHandlerGenerator::temp();
270 __ pop(t); // remove return address first
271 // Must return a result for interpreter or compiler. In SSE
272 // mode, results are returned in xmm0 and the FPU stack must
273 // be empty.
274 if (type == T_FLOAT && UseSSE >= 1) {
275 // Load ST0
276 __ fld_d(Address(rsp, 0));
277 // Store as float and empty fpu stack
278 __ fstp_s(Address(rsp, 0));
279 // and reload
280 __ movflt(xmm0, Address(rsp, 0));
281 } else if (type == T_DOUBLE && UseSSE >= 2 ) {
282 __ movdbl(xmm0, Address(rsp, 0));
283 } else {
284 // restore ST0
285 __ fld_d(Address(rsp, 0));
286 }
287 // and pop the temp
288 __ addptr(rsp, 2 * wordSize);
289 __ push(t); // restore return address
290 }
291 break;
292 case T_OBJECT :
293 // retrieve result from frame
294 __ movptr(rax, Address(rbp, frame::interpreter_frame_oop_temp_offset*wordSize));
295 // and verify it
296 __ verify_oop(rax);
297 break;
298 default : ShouldNotReachHere();
299 }
300 __ ret(0); // return from result handler
301 return entry;
302 }
303
304 address TemplateInterpreterGenerator::generate_safept_entry_for(TosState state, address runtime_entry) {
305 address entry = __ pc();
306 __ push(state);
307 __ call_VM(noreg, runtime_entry);
308 __ dispatch_via(vtos, Interpreter::_normal_table.table_for(vtos));
309 return entry;
310 }
311
312
313 // Helpers for commoning out cases in the various type of method entries.
314 //
315
316 // increment invocation count & check for overflow
317 //
318 // Note: checking for negative value instead of overflow
319 // so we have a 'sticky' overflow test
320 //
321 // rbx,: method
322 // rcx: invocation counter
323 //
324 void InterpreterGenerator::generate_counter_incr(Label* overflow, Label* profile_method, Label* profile_method_continue) {
325 Label done;
326 // Note: In tiered we increment either counters in MethodCounters* or in MDO
327 // depending if we're profiling or not.
328 if (TieredCompilation) {
329 int increment = InvocationCounter::count_increment;
330 Label no_mdo;
331 if (ProfileInterpreter) {
332 // Are we profiling?
333 __ movptr(rax, Address(rbx, Method::method_data_offset()));
334 __ testptr(rax, rax);
335 __ jccb(Assembler::zero, no_mdo);
336 // Increment counter in the MDO
337 const Address mdo_invocation_counter(rax, in_bytes(MethodData::invocation_counter_offset()) +
338 in_bytes(InvocationCounter::counter_offset()));
339 const Address mask(rax, in_bytes(MethodData::invoke_mask_offset()));
340 __ increment_mask_and_jump(mdo_invocation_counter, increment, mask, rcx, false, Assembler::zero, overflow);
341 __ jmp(done);
342 }
343 __ bind(no_mdo);
344 // Increment counter in MethodCounters
345 const Address invocation_counter(rax,
346 MethodCounters::invocation_counter_offset() +
347 InvocationCounter::counter_offset());
348
349 __ get_method_counters(rbx, rax, done);
350 const Address mask(rax, in_bytes(MethodCounters::invoke_mask_offset()));
351 __ increment_mask_and_jump(invocation_counter, increment, mask,
352 rcx, false, Assembler::zero, overflow);
353 __ bind(done);
354 } else { // not TieredCompilation
355 const Address backedge_counter(rax,
356 MethodCounters::backedge_counter_offset() +
357 InvocationCounter::counter_offset());
358 const Address invocation_counter(rax,
359 MethodCounters::invocation_counter_offset() +
360 InvocationCounter::counter_offset());
361
362 __ get_method_counters(rbx, rax, done);
363
364 if (ProfileInterpreter) {
365 __ incrementl(Address(rax,
366 MethodCounters::interpreter_invocation_counter_offset()));
367 }
368
369 // Update standard invocation counters
370 __ movl(rcx, invocation_counter);
371 __ incrementl(rcx, InvocationCounter::count_increment);
372 __ movl(invocation_counter, rcx); // save invocation count
373
374 __ movl(rax, backedge_counter); // load backedge counter
375 __ andl(rax, InvocationCounter::count_mask_value); // mask out the status bits
376
377 __ addl(rcx, rax); // add both counters
378
379 // profile_method is non-null only for interpreted method so
380 // profile_method != NULL == !native_call
381 // BytecodeInterpreter only calls for native so code is elided.
382
383 if (ProfileInterpreter && profile_method != NULL) {
384 // Test to see if we should create a method data oop
385 __ movptr(rax, Address(rbx, Method::method_counters_offset()));
386 __ cmp32(rcx, Address(rax, in_bytes(MethodCounters::interpreter_profile_limit_offset())));
387 __ jcc(Assembler::less, *profile_method_continue);
388
389 // if no method data exists, go to profile_method
390 __ test_method_data_pointer(rax, *profile_method);
391 }
392
393 __ movptr(rax, Address(rbx, Method::method_counters_offset()));
394 __ cmp32(rcx, Address(rax, in_bytes(MethodCounters::interpreter_invocation_limit_offset())));
395 __ jcc(Assembler::aboveEqual, *overflow);
396 __ bind(done);
397 }
398 }
399
400 void InterpreterGenerator::generate_counter_overflow(Label* do_continue) {
401
402 // Asm interpreter on entry
403 // rdi - locals
404 // rsi - bcp
405 // rbx, - method
406 // rdx - cpool
407 // rbp, - interpreter frame
408
409 // C++ interpreter on entry
410 // rsi - new interpreter state pointer
411 // rbp - interpreter frame pointer
412 // rbx - method
413
414 // On return (i.e. jump to entry_point) [ back to invocation of interpreter ]
415 // rbx, - method
416 // rcx - rcvr (assuming there is one)
417 // top of stack return address of interpreter caller
418 // rsp - sender_sp
419
420 // C++ interpreter only
421 // rsi - previous interpreter state pointer
422
423 // InterpreterRuntime::frequency_counter_overflow takes one argument
424 // indicating if the counter overflow occurs at a backwards branch (non-NULL bcp).
425 // The call returns the address of the verified entry point for the method or NULL
426 // if the compilation did not complete (either went background or bailed out).
427 __ movptr(rax, (intptr_t)false);
428 __ call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::frequency_counter_overflow), rax);
429
430 __ movptr(rbx, Address(rbp, method_offset)); // restore Method*
431
432 // Preserve invariant that rsi/rdi contain bcp/locals of sender frame
433 // and jump to the interpreted entry.
434 __ jmp(*do_continue, relocInfo::none);
435
436 }
437
438 void InterpreterGenerator::generate_stack_overflow_check(void) {
439 // see if we've got enough room on the stack for locals plus overhead.
440 // the expression stack grows down incrementally, so the normal guard
441 // page mechanism will work for that.
442 //
443 // Registers live on entry:
444 //
445 // Asm interpreter
446 // rdx: number of additional locals this frame needs (what we must check)
447 // rbx,: Method*
448
449 // destroyed on exit
450 // rax,
451
452 // NOTE: since the additional locals are also always pushed (wasn't obvious in
453 // generate_fixed_frame) so the guard should work for them too.
454 //
455
456 // monitor entry size: see picture of stack in frame_x86.hpp
457 const int entry_size = frame::interpreter_frame_monitor_size() * wordSize;
458
459 // total overhead size: entry_size + (saved rbp, thru expr stack bottom).
460 // be sure to change this if you add/subtract anything to/from the overhead area
461 const int overhead_size = -(frame::interpreter_frame_initial_sp_offset*wordSize) + entry_size;
462
463 const int page_size = os::vm_page_size();
464
465 Label after_frame_check;
466
467 // see if the frame is greater than one page in size. If so,
468 // then we need to verify there is enough stack space remaining
469 // for the additional locals.
470 __ cmpl(rdx, (page_size - overhead_size)/Interpreter::stackElementSize);
471 __ jcc(Assembler::belowEqual, after_frame_check);
472
473 // compute rsp as if this were going to be the last frame on
474 // the stack before the red zone
475
476 Label after_frame_check_pop;
477
478 __ push(rsi);
479
480 const Register thread = rsi;
481
482 __ get_thread(thread);
483
484 const Address stack_base(thread, Thread::stack_base_offset());
485 const Address stack_size(thread, Thread::stack_size_offset());
486
487 // locals + overhead, in bytes
488 __ lea(rax, Address(noreg, rdx, Interpreter::stackElementScale(), overhead_size));
489
490 #ifdef ASSERT
491 Label stack_base_okay, stack_size_okay;
492 // verify that thread stack base is non-zero
493 __ cmpptr(stack_base, (int32_t)NULL_WORD);
494 __ jcc(Assembler::notEqual, stack_base_okay);
495 __ stop("stack base is zero");
496 __ bind(stack_base_okay);
497 // verify that thread stack size is non-zero
498 __ cmpptr(stack_size, 0);
499 __ jcc(Assembler::notEqual, stack_size_okay);
500 __ stop("stack size is zero");
501 __ bind(stack_size_okay);
502 #endif
503
504 // Add stack base to locals and subtract stack size
505 __ addptr(rax, stack_base);
506 __ subptr(rax, stack_size);
507
508 // Use the maximum number of pages we might bang.
509 const int max_pages = StackShadowPages > (StackRedPages+StackYellowPages) ? StackShadowPages :
510 (StackRedPages+StackYellowPages);
511 __ addptr(rax, max_pages * page_size);
512
513 // check against the current stack bottom
514 __ cmpptr(rsp, rax);
515 __ jcc(Assembler::above, after_frame_check_pop);
516
517 __ pop(rsi); // get saved bcp / (c++ prev state ).
518
519 // Restore sender's sp as SP. This is necessary if the sender's
520 // frame is an extended compiled frame (see gen_c2i_adapter())
521 // and safer anyway in case of JSR292 adaptations.
522
523 __ pop(rax); // return address must be moved if SP is changed
524 __ mov(rsp, rsi);
525 __ push(rax);
526
527 // Note: the restored frame is not necessarily interpreted.
528 // Use the shared runtime version of the StackOverflowError.
529 assert(StubRoutines::throw_StackOverflowError_entry() != NULL, "stub not yet generated");
530 __ jump(ExternalAddress(StubRoutines::throw_StackOverflowError_entry()));
531 // all done with frame size check
532 __ bind(after_frame_check_pop);
533 __ pop(rsi);
534
535 __ bind(after_frame_check);
536 }
537
538 // Allocate monitor and lock method (asm interpreter)
539 // rbx, - Method*
540 //
541 void InterpreterGenerator::lock_method(void) {
542 // synchronize method
543 const Address access_flags (rbx, Method::access_flags_offset());
544 const Address monitor_block_top (rbp, frame::interpreter_frame_monitor_block_top_offset * wordSize);
545 const int entry_size = frame::interpreter_frame_monitor_size() * wordSize;
546
547 #ifdef ASSERT
548 { Label L;
549 __ movl(rax, access_flags);
550 __ testl(rax, JVM_ACC_SYNCHRONIZED);
551 __ jcc(Assembler::notZero, L);
552 __ stop("method doesn't need synchronization");
553 __ bind(L);
554 }
555 #endif // ASSERT
556 // get synchronization object
557 { Label done;
558 const int mirror_offset = in_bytes(Klass::java_mirror_offset());
559 __ movl(rax, access_flags);
560 __ testl(rax, JVM_ACC_STATIC);
561 __ movptr(rax, Address(rdi, Interpreter::local_offset_in_bytes(0))); // get receiver (assume this is frequent case)
562 __ jcc(Assembler::zero, done);
563 __ movptr(rax, Address(rbx, Method::const_offset()));
564 __ movptr(rax, Address(rax, ConstMethod::constants_offset()));
565 __ movptr(rax, Address(rax, ConstantPool::pool_holder_offset_in_bytes()));
566 __ movptr(rax, Address(rax, mirror_offset));
567 __ bind(done);
568 }
569 // add space for monitor & lock
570 __ subptr(rsp, entry_size); // add space for a monitor entry
571 __ movptr(monitor_block_top, rsp); // set new monitor block top
572 __ movptr(Address(rsp, BasicObjectLock::obj_offset_in_bytes()), rax); // store object
573 __ mov(rdx, rsp); // object address
574 __ lock_object(rdx);
575 }
576
577 //
578 // Generate a fixed interpreter frame. This is identical setup for interpreted methods
579 // and for native methods hence the shared code.
580
581 void TemplateInterpreterGenerator::generate_fixed_frame(bool native_call) {
582 // initialize fixed part of activation frame
583 __ push(rax); // save return address
584 __ enter(); // save old & set new rbp,
585
586
587 __ push(rsi); // set sender sp
588 __ push((int32_t)NULL_WORD); // leave last_sp as null
589 __ movptr(rsi, Address(rbx,Method::const_offset())); // get ConstMethod*
590 __ lea(rsi, Address(rsi,ConstMethod::codes_offset())); // get codebase
591 __ push(rbx); // save Method*
592 if (ProfileInterpreter) {
593 Label method_data_continue;
594 __ movptr(rdx, Address(rbx, in_bytes(Method::method_data_offset())));
595 __ testptr(rdx, rdx);
596 __ jcc(Assembler::zero, method_data_continue);
597 __ addptr(rdx, in_bytes(MethodData::data_offset()));
598 __ bind(method_data_continue);
599 __ push(rdx); // set the mdp (method data pointer)
600 } else {
601 __ push(0);
602 }
603
604 __ movptr(rdx, Address(rbx, Method::const_offset()));
605 __ movptr(rdx, Address(rdx, ConstMethod::constants_offset()));
606 __ movptr(rdx, Address(rdx, ConstantPool::cache_offset_in_bytes()));
607 __ push(rdx); // set constant pool cache
608 __ push(rdi); // set locals pointer
609 if (native_call) {
610 __ push(0); // no bcp
611 } else {
612 __ push(rsi); // set bcp
613 }
614 __ push(0); // reserve word for pointer to expression stack bottom
615 __ movptr(Address(rsp, 0), rsp); // set expression stack bottom
616 }
617
618
619 // Method entry for java.lang.ref.Reference.get.
620 address InterpreterGenerator::generate_Reference_get_entry(void) {
621 #if INCLUDE_ALL_GCS
622 // Code: _aload_0, _getfield, _areturn
623 // parameter size = 1
624 //
625 // The code that gets generated by this routine is split into 2 parts:
626 // 1. The "intrinsified" code for G1 (or any SATB based GC),
627 // 2. The slow path - which is an expansion of the regular method entry.
628 //
629 // Notes:-
630 // * In the G1 code we do not check whether we need to block for
631 // a safepoint. If G1 is enabled then we must execute the specialized
632 // code for Reference.get (except when the Reference object is null)
633 // so that we can log the value in the referent field with an SATB
634 // update buffer.
635 // If the code for the getfield template is modified so that the
636 // G1 pre-barrier code is executed when the current method is
637 // Reference.get() then going through the normal method entry
638 // will be fine.
639 // * The G1 code below can, however, check the receiver object (the instance
640 // of java.lang.Reference) and jump to the slow path if null. If the
641 // Reference object is null then we obviously cannot fetch the referent
642 // and so we don't need to call the G1 pre-barrier. Thus we can use the
643 // regular method entry code to generate the NPE.
644 //
645 // This code is based on generate_accessor_enty.
646
647 // rbx,: Method*
648 // rcx: receiver (preserve for slow entry into asm interpreter)
649
650 // rsi: senderSP must preserved for slow path, set SP to it on fast path
651
652 address entry = __ pc();
653
654 const int referent_offset = java_lang_ref_Reference::referent_offset;
655 guarantee(referent_offset > 0, "referent offset not initialized");
656
657 if (UseG1GC) {
658 Label slow_path;
659
660 // Check if local 0 != NULL
661 // If the receiver is null then it is OK to jump to the slow path.
662 __ movptr(rax, Address(rsp, wordSize));
663 __ testptr(rax, rax);
664 __ jcc(Assembler::zero, slow_path);
665
666 // rax: local 0 (must be preserved across the G1 barrier call)
667 //
668 // rbx: method (at this point it's scratch)
669 // rcx: receiver (at this point it's scratch)
670 // rdx: scratch
671 // rdi: scratch
672 //
673 // rsi: sender sp
674
675 // Preserve the sender sp in case the pre-barrier
676 // calls the runtime
677 __ push(rsi);
678
679 // Load the value of the referent field.
680 const Address field_address(rax, referent_offset);
681 __ movptr(rax, field_address);
682
683 // Generate the G1 pre-barrier code to log the value of
684 // the referent field in an SATB buffer.
685 __ get_thread(rcx);
686 __ g1_write_barrier_pre(noreg /* obj */,
687 rax /* pre_val */,
688 rcx /* thread */,
689 rbx /* tmp */,
690 true /* tosca_save */,
691 true /* expand_call */);
692
693 // _areturn
694 __ pop(rsi); // get sender sp
695 __ pop(rdi); // get return address
696 __ mov(rsp, rsi); // set sp to sender sp
697 __ jmp(rdi);
698
699 __ bind(slow_path);
700 (void) generate_normal_entry(false);
701
702 return entry;
703 }
704 #endif // INCLUDE_ALL_GCS
705
706 // If G1 is not enabled then attempt to go through the accessor entry point
707 // Reference.get is an accessor
708 return generate_jump_to_normal_entry();
709 }
710
711 /**
712 * Method entry for static native methods:
713 * int java.util.zip.CRC32.update(int crc, int b)
714 */
715 address InterpreterGenerator::generate_CRC32_update_entry() {
716 if (UseCRC32Intrinsics) {
717 address entry = __ pc();
718
719 // rbx: Method*
720 // rsi: senderSP must preserved for slow path, set SP to it on fast path
721 // rdx: scratch
722 // rdi: scratch
723
724 Label slow_path;
725 // If we need a safepoint check, generate full interpreter entry.
726 ExternalAddress state(SafepointSynchronize::address_of_state());
727 __ cmp32(ExternalAddress(SafepointSynchronize::address_of_state()),
728 SafepointSynchronize::_not_synchronized);
729 __ jcc(Assembler::notEqual, slow_path);
730
731 // We don't generate local frame and don't align stack because
732 // we call stub code and there is no safepoint on this path.
733
734 // Load parameters
735 const Register crc = rax; // crc
736 const Register val = rdx; // source java byte value
737 const Register tbl = rdi; // scratch
738
739 // Arguments are reversed on java expression stack
740 __ movl(val, Address(rsp, wordSize)); // byte value
741 __ movl(crc, Address(rsp, 2*wordSize)); // Initial CRC
742
743 __ lea(tbl, ExternalAddress(StubRoutines::crc_table_addr()));
744 __ notl(crc); // ~crc
745 __ update_byte_crc32(crc, val, tbl);
746 __ notl(crc); // ~crc
747 // result in rax
748
749 // _areturn
750 __ pop(rdi); // get return address
751 __ mov(rsp, rsi); // set sp to sender sp
752 __ jmp(rdi);
753
754 // generate a vanilla native entry as the slow path
755 __ bind(slow_path);
756
757 (void) generate_native_entry(false);
758
759 return entry;
760 }
761 return generate_native_entry(false);
762 }
763
764 /**
765 * Method entry for static native methods:
766 * int java.util.zip.CRC32.updateBytes(int crc, byte[] b, int off, int len)
767 * int java.util.zip.CRC32.updateByteBuffer(int crc, long buf, int off, int len)
768 */
769 address InterpreterGenerator::generate_CRC32_updateBytes_entry(AbstractInterpreter::MethodKind kind) {
770 if (UseCRC32Intrinsics) {
771 address entry = __ pc();
772
773 // rbx,: Method*
774 // rsi: senderSP must preserved for slow path, set SP to it on fast path
775 // rdx: scratch
776 // rdi: scratch
777
778 Label slow_path;
779 // If we need a safepoint check, generate full interpreter entry.
780 ExternalAddress state(SafepointSynchronize::address_of_state());
781 __ cmp32(ExternalAddress(SafepointSynchronize::address_of_state()),
782 SafepointSynchronize::_not_synchronized);
783 __ jcc(Assembler::notEqual, slow_path);
784
785 // We don't generate local frame and don't align stack because
786 // we call stub code and there is no safepoint on this path.
787
788 // Load parameters
789 const Register crc = rax; // crc
790 const Register buf = rdx; // source java byte array address
791 const Register len = rdi; // length
792
793 // Arguments are reversed on java expression stack
794 __ movl(len, Address(rsp, wordSize)); // Length
795 // Calculate address of start element
796 if (kind == Interpreter::java_util_zip_CRC32_updateByteBuffer) {
797 __ movptr(buf, Address(rsp, 3*wordSize)); // long buf
798 __ addptr(buf, Address(rsp, 2*wordSize)); // + offset
799 __ movl(crc, Address(rsp, 5*wordSize)); // Initial CRC
800 } else {
801 __ movptr(buf, Address(rsp, 3*wordSize)); // byte[] array
802 __ addptr(buf, arrayOopDesc::base_offset_in_bytes(T_BYTE)); // + header size
803 __ addptr(buf, Address(rsp, 2*wordSize)); // + offset
804 __ movl(crc, Address(rsp, 4*wordSize)); // Initial CRC
805 }
806
807 __ super_call_VM_leaf(CAST_FROM_FN_PTR(address, StubRoutines::updateBytesCRC32()), crc, buf, len);
808 // result in rax
809
810 // _areturn
811 __ pop(rdi); // get return address
812 __ mov(rsp, rsi); // set sp to sender sp
813 __ jmp(rdi);
814
815 // generate a vanilla native entry as the slow path
816 __ bind(slow_path);
817
818 (void) generate_native_entry(false);
819
820 return entry;
821 }
822 return generate_native_entry(false);
823 }
824
825 /**
826 * Method entry for static native method:
827 * java.lang.Float.intBitsToFloat(int bits)
828 */
829 address InterpreterGenerator::generate_Float_intBitsToFloat_entry() {
830 address entry;
831
832 if (UseSSE >= 1) {
833 entry = __ pc();
834
835 // rsi: the sender's SP
836
837 // Skip safepoint check (compiler intrinsic versions of this method
838 // do not perform safepoint checks either).
839
840 // Load 'bits' into xmm0 (interpreter returns results in xmm0)
841 __ movflt(xmm0, Address(rsp, wordSize));
842
843 // Return
844 __ pop(rdi); // get return address
845 __ mov(rsp, rsi); // set rsp to the sender's SP
846 __ jmp(rdi);
847 } else {
848 entry = generate_native_entry(false);
849 }
850
851 return entry;
852 }
853
854 /**
855 * Method entry for static native method:
856 * java.lang.Float.floatToRawIntBits(float value)
857 */
858 address InterpreterGenerator::generate_Float_floatToRawIntBits_entry() {
859 address entry;
860
861 if (UseSSE >= 1) {
862 entry = __ pc();
863
864 // rsi: the sender's SP
865
866 // Skip safepoint check (compiler intrinsic versions of this method
867 // do not perform safepoint checks either).
868
869 // Load the parameter (a floating-point value) into rax.
870 __ movl(rax, Address(rsp, wordSize));
871
872 // Return
873 __ pop(rdi); // get return address
874 __ mov(rsp, rsi); // set rsp to the sender's SP
875 __ jmp(rdi);
876 } else {
877 entry = generate_native_entry(false);
878 }
879
880 return entry;
881 }
882
883
884 /**
885 * Method entry for static native method:
886 * java.lang.Double.longBitsToDouble(long bits)
887 */
888 address InterpreterGenerator::generate_Double_longBitsToDouble_entry() {
889 address entry;
890
891 if (UseSSE >= 2) {
892 entry = __ pc();
893
894 // rsi: the sender's SP
895
896 // Skip safepoint check (compiler intrinsic versions of this method
897 // do not perform safepoint checks either).
898
899 // Load 'bits' into xmm0 (interpreter returns results in xmm0)
900 __ movdbl(xmm0, Address(rsp, wordSize));
901
902 // Return
903 __ pop(rdi); // get return address
904 __ mov(rsp, rsi); // set rsp to the sender's SP
905 __ jmp(rdi);
906 } else {
907 entry = generate_native_entry(false);
908 }
909
910 return entry;
911 }
912
913 /**
914 * Method entry for static native method:
915 * java.lang.Double.doubleToRawLongBits(double value)
916 */
917 address InterpreterGenerator::generate_Double_doubleToRawLongBits_entry() {
918 address entry;
919
920 if (UseSSE >= 2) {
921 entry = __ pc();
922
923 // rsi: the sender's SP
924
925 // Skip safepoint check (compiler intrinsic versions of this method
926 // do not perform safepoint checks either).
927
928 // Load the parameter (a floating-point value) into rax.
929 __ movl(rdx, Address(rsp, 2*wordSize));
930 __ movl(rax, Address(rsp, wordSize));
931
932 // Return
933 __ pop(rdi); // get return address
934 __ mov(rsp, rsi); // set rsp to the sender's SP
935 __ jmp(rdi);
936 } else {
937 entry = generate_native_entry(false);
938 }
939
940 return entry;
941 }
942
943 //
944 // Interpreter stub for calling a native method. (asm interpreter)
945 // This sets up a somewhat different looking stack for calling the native method
946 // than the typical interpreter frame setup.
947 //
948
949 address InterpreterGenerator::generate_native_entry(bool synchronized) {
950 // determine code generation flags
951 bool inc_counter = UseCompiler || CountCompiledCalls || LogTouchedMethods;
952
953 // rbx,: Method*
954 // rsi: sender sp
955 // rsi: previous interpreter state (C++ interpreter) must preserve
956 address entry_point = __ pc();
957
958 const Address constMethod (rbx, Method::const_offset());
959 const Address access_flags (rbx, Method::access_flags_offset());
960 const Address size_of_parameters(rcx, ConstMethod::size_of_parameters_offset());
961
962 // get parameter size (always needed)
963 __ movptr(rcx, constMethod);
964 __ load_unsigned_short(rcx, size_of_parameters);
965
966 // native calls don't need the stack size check since they have no expression stack
967 // and the arguments are already on the stack and we only add a handful of words
968 // to the stack
969
970 // rbx,: Method*
971 // rcx: size of parameters
972 // rsi: sender sp
973
974 __ pop(rax); // get return address
975 // for natives the size of locals is zero
976
977 // compute beginning of parameters (rdi)
978 __ lea(rdi, Address(rsp, rcx, Interpreter::stackElementScale(), -wordSize));
979
980
981 // add 2 zero-initialized slots for native calls
982 // NULL result handler
983 __ push((int32_t)NULL_WORD);
984 // NULL oop temp (mirror or jni oop result)
985 __ push((int32_t)NULL_WORD);
986
987 // initialize fixed part of activation frame
988 generate_fixed_frame(true);
989
990 // make sure method is native & not abstract
991 #ifdef ASSERT
992 __ movl(rax, access_flags);
993 {
994 Label L;
995 __ testl(rax, JVM_ACC_NATIVE);
996 __ jcc(Assembler::notZero, L);
997 __ stop("tried to execute non-native method as native");
998 __ bind(L);
999 }
1000 { Label L;
1001 __ testl(rax, JVM_ACC_ABSTRACT);
1002 __ jcc(Assembler::zero, L);
1003 __ stop("tried to execute abstract method in interpreter");
1004 __ bind(L);
1005 }
1006 #endif
1007
1008 // Since at this point in the method invocation the exception handler
1009 // would try to exit the monitor of synchronized methods which hasn't
1010 // been entered yet, we set the thread local variable
1011 // _do_not_unlock_if_synchronized to true. The remove_activation will
1012 // check this flag.
1013
1014 __ get_thread(rax);
1015 const Address do_not_unlock_if_synchronized(rax,
1016 in_bytes(JavaThread::do_not_unlock_if_synchronized_offset()));
1017 __ movbool(do_not_unlock_if_synchronized, true);
1018
1019 // increment invocation count & check for overflow
1020 Label invocation_counter_overflow;
1021 if (inc_counter) {
1022 generate_counter_incr(&invocation_counter_overflow, NULL, NULL);
1023 }
1024
1025 Label continue_after_compile;
1026 __ bind(continue_after_compile);
1027
1028 bang_stack_shadow_pages(true);
1029
1030 // reset the _do_not_unlock_if_synchronized flag
1031 __ get_thread(rax);
1032 __ movbool(do_not_unlock_if_synchronized, false);
1033
1034 // check for synchronized methods
1035 // Must happen AFTER invocation_counter check and stack overflow check,
1036 // so method is not locked if overflows.
1037 //
1038 if (synchronized) {
1039 lock_method();
1040 } else {
1041 // no synchronization necessary
1042 #ifdef ASSERT
1043 { Label L;
1044 __ movl(rax, access_flags);
1045 __ testl(rax, JVM_ACC_SYNCHRONIZED);
1046 __ jcc(Assembler::zero, L);
1047 __ stop("method needs synchronization");
1048 __ bind(L);
1049 }
1050 #endif
1051 }
1052
1053 // start execution
1054 #ifdef ASSERT
1055 { Label L;
1056 const Address monitor_block_top (rbp,
1057 frame::interpreter_frame_monitor_block_top_offset * wordSize);
1058 __ movptr(rax, monitor_block_top);
1059 __ cmpptr(rax, rsp);
1060 __ jcc(Assembler::equal, L);
1061 __ stop("broken stack frame setup in interpreter");
1062 __ bind(L);
1063 }
1064 #endif
1065
1066 // jvmti/dtrace support
1067 __ notify_method_entry();
1068
1069 // work registers
1070 const Register method = rbx;
1071 const Register thread = rdi;
1072 const Register t = rcx;
1073
1074 // allocate space for parameters
1075 __ get_method(method);
1076 __ movptr(t, Address(method, Method::const_offset()));
1077 __ load_unsigned_short(t, Address(t, ConstMethod::size_of_parameters_offset()));
1078
1079 __ shlptr(t, Interpreter::logStackElementSize);
1080 __ addptr(t, 2*wordSize); // allocate two more slots for JNIEnv and possible mirror
1081 __ subptr(rsp, t);
1082 __ andptr(rsp, -(StackAlignmentInBytes)); // gcc needs 16 byte aligned stacks to do XMM intrinsics
1083
1084 // get signature handler
1085 { Label L;
1086 __ movptr(t, Address(method, Method::signature_handler_offset()));
1087 __ testptr(t, t);
1088 __ jcc(Assembler::notZero, L);
1089 __ call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::prepare_native_call), method);
1090 __ get_method(method);
1091 __ movptr(t, Address(method, Method::signature_handler_offset()));
1092 __ bind(L);
1093 }
1094
1095 // call signature handler
1096 assert(InterpreterRuntime::SignatureHandlerGenerator::from() == rdi, "adjust this code");
1097 assert(InterpreterRuntime::SignatureHandlerGenerator::to () == rsp, "adjust this code");
1098 assert(InterpreterRuntime::SignatureHandlerGenerator::temp() == t , "adjust this code");
1099 // The generated handlers do not touch RBX (the method oop).
1100 // However, large signatures cannot be cached and are generated
1101 // each time here. The slow-path generator will blow RBX
1102 // sometime, so we must reload it after the call.
1103 __ call(t);
1104 __ get_method(method); // slow path call blows RBX on DevStudio 5.0
1105
1106 // result handler is in rax,
1107 // set result handler
1108 __ movptr(Address(rbp, frame::interpreter_frame_result_handler_offset*wordSize), rax);
1109
1110 // pass mirror handle if static call
1111 { Label L;
1112 const int mirror_offset = in_bytes(Klass::java_mirror_offset());
1113 __ movl(t, Address(method, Method::access_flags_offset()));
1114 __ testl(t, JVM_ACC_STATIC);
1115 __ jcc(Assembler::zero, L);
1116 // get mirror
1117 __ movptr(t, Address(method, Method:: const_offset()));
1118 __ movptr(t, Address(t, ConstMethod::constants_offset()));
1119 __ movptr(t, Address(t, ConstantPool::pool_holder_offset_in_bytes()));
1120 __ movptr(t, Address(t, mirror_offset));
1121 // copy mirror into activation frame
1122 __ movptr(Address(rbp, frame::interpreter_frame_oop_temp_offset * wordSize), t);
1123 // pass handle to mirror
1124 __ lea(t, Address(rbp, frame::interpreter_frame_oop_temp_offset * wordSize));
1125 __ movptr(Address(rsp, wordSize), t);
1126 __ bind(L);
1127 }
1128
1129 // get native function entry point
1130 { Label L;
1131 __ movptr(rax, Address(method, Method::native_function_offset()));
1132 ExternalAddress unsatisfied(SharedRuntime::native_method_throw_unsatisfied_link_error_entry());
1133 __ cmpptr(rax, unsatisfied.addr());
1134 __ jcc(Assembler::notEqual, L);
1135 __ call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::prepare_native_call), method);
1136 __ get_method(method);
1137 __ movptr(rax, Address(method, Method::native_function_offset()));
1138 __ bind(L);
1139 }
1140
1141 // pass JNIEnv
1142 __ get_thread(thread);
1143 __ lea(t, Address(thread, JavaThread::jni_environment_offset()));
1144 __ movptr(Address(rsp, 0), t);
1145
1146 // set_last_Java_frame_before_call
1147 // It is enough that the pc()
1148 // points into the right code segment. It does not have to be the correct return pc.
1149 __ set_last_Java_frame(thread, noreg, rbp, __ pc());
1150
1151 // change thread state
1152 #ifdef ASSERT
1153 { Label L;
1154 __ movl(t, Address(thread, JavaThread::thread_state_offset()));
1155 __ cmpl(t, _thread_in_Java);
1156 __ jcc(Assembler::equal, L);
1157 __ stop("Wrong thread state in native stub");
1158 __ bind(L);
1159 }
1160 #endif
1161
1162 // Change state to native
1163 __ movl(Address(thread, JavaThread::thread_state_offset()), _thread_in_native);
1164 __ call(rax);
1165
1166 // result potentially in rdx:rax or ST0
1167
1168 // Verify or restore cpu control state after JNI call
1169 __ restore_cpu_control_state_after_jni();
1170
1171 // save potential result in ST(0) & rdx:rax
1172 // (if result handler is the T_FLOAT or T_DOUBLE handler, result must be in ST0 -
1173 // the check is necessary to avoid potential Intel FPU overflow problems by saving/restoring 'empty' FPU registers)
1174 // It is safe to do this push because state is _thread_in_native and return address will be found
1175 // via _last_native_pc and not via _last_jave_sp
1176
1177 // NOTE: the order of theses push(es) is known to frame::interpreter_frame_result.
1178 // If the order changes or anything else is added to the stack the code in
1179 // interpreter_frame_result will have to be changed.
1180
1181 { Label L;
1182 Label push_double;
1183 ExternalAddress float_handler(AbstractInterpreter::result_handler(T_FLOAT));
1184 ExternalAddress double_handler(AbstractInterpreter::result_handler(T_DOUBLE));
1185 __ cmpptr(Address(rbp, (frame::interpreter_frame_oop_temp_offset + 1)*wordSize),
1186 float_handler.addr());
1187 __ jcc(Assembler::equal, push_double);
1188 __ cmpptr(Address(rbp, (frame::interpreter_frame_oop_temp_offset + 1)*wordSize),
1189 double_handler.addr());
1190 __ jcc(Assembler::notEqual, L);
1191 __ bind(push_double);
1192 __ push_d(); // FP values are returned using the FPU, so push FPU contents (even if UseSSE > 0).
1193 __ bind(L);
1194 }
1195 __ push(ltos);
1196
1197 // change thread state
1198 __ get_thread(thread);
1199 __ movl(Address(thread, JavaThread::thread_state_offset()), _thread_in_native_trans);
1200 if(os::is_MP()) {
1201 if (UseMembar) {
1202 // Force this write out before the read below
1203 __ membar(Assembler::Membar_mask_bits(
1204 Assembler::LoadLoad | Assembler::LoadStore |
1205 Assembler::StoreLoad | Assembler::StoreStore));
1206 } else {
1207 // Write serialization page so VM thread can do a pseudo remote membar.
1208 // We use the current thread pointer to calculate a thread specific
1209 // offset to write to within the page. This minimizes bus traffic
1210 // due to cache line collision.
1211 __ serialize_memory(thread, rcx);
1212 }
1213 }
1214
1215 if (AlwaysRestoreFPU) {
1216 // Make sure the control word is correct.
1217 __ fldcw(ExternalAddress(StubRoutines::addr_fpu_cntrl_wrd_std()));
1218 }
1219
1220 // check for safepoint operation in progress and/or pending suspend requests
1221 { Label Continue;
1222
1223 __ cmp32(ExternalAddress(SafepointSynchronize::address_of_state()),
1224 SafepointSynchronize::_not_synchronized);
1225
1226 Label L;
1227 __ jcc(Assembler::notEqual, L);
1228 __ cmpl(Address(thread, JavaThread::suspend_flags_offset()), 0);
1229 __ jcc(Assembler::equal, Continue);
1230 __ bind(L);
1231
1232 // Don't use call_VM as it will see a possible pending exception and forward it
1233 // and never return here preventing us from clearing _last_native_pc down below.
1234 // Also can't use call_VM_leaf either as it will check to see if rsi & rdi are
1235 // preserved and correspond to the bcp/locals pointers. So we do a runtime call
1236 // by hand.
1237 //
1238 __ push(thread);
1239 __ call(RuntimeAddress(CAST_FROM_FN_PTR(address,
1240 JavaThread::check_special_condition_for_native_trans)));
1241 __ increment(rsp, wordSize);
1242 __ get_thread(thread);
1243
1244 __ bind(Continue);
1245 }
1246
1247 // change thread state
1248 __ movl(Address(thread, JavaThread::thread_state_offset()), _thread_in_Java);
1249
1250 __ reset_last_Java_frame(thread, true, true);
1251
1252 // reset handle block
1253 __ movptr(t, Address(thread, JavaThread::active_handles_offset()));
1254 __ movl(Address(t, JNIHandleBlock::top_offset_in_bytes()), NULL_WORD);
1255
1256 // If result was an oop then unbox and save it in the frame
1257 { Label L;
1258 Label no_oop, store_result;
1259 ExternalAddress handler(AbstractInterpreter::result_handler(T_OBJECT));
1260 __ cmpptr(Address(rbp, frame::interpreter_frame_result_handler_offset*wordSize),
1261 handler.addr());
1262 __ jcc(Assembler::notEqual, no_oop);
1263 __ cmpptr(Address(rsp, 0), (int32_t)NULL_WORD);
1264 __ pop(ltos);
1265 __ testptr(rax, rax);
1266 __ jcc(Assembler::zero, store_result);
1267 // unbox
1268 __ movptr(rax, Address(rax, 0));
1269 __ bind(store_result);
1270 __ movptr(Address(rbp, (frame::interpreter_frame_oop_temp_offset)*wordSize), rax);
1271 // keep stack depth as expected by pushing oop which will eventually be discarded
1272 __ push(ltos);
1273 __ bind(no_oop);
1274 }
1275
1276 {
1277 Label no_reguard;
1278 __ cmpl(Address(thread, JavaThread::stack_guard_state_offset()), JavaThread::stack_guard_yellow_disabled);
1279 __ jcc(Assembler::notEqual, no_reguard);
1280
1281 __ pusha();
1282 __ call(RuntimeAddress(CAST_FROM_FN_PTR(address, SharedRuntime::reguard_yellow_pages)));
1283 __ popa();
1284
1285 __ bind(no_reguard);
1286 }
1287
1288 // restore rsi to have legal interpreter frame,
1289 // i.e., bci == 0 <=> rsi == code_base()
1290 // Can't call_VM until bcp is within reasonable.
1291 __ get_method(method); // method is junk from thread_in_native to now.
1292 __ movptr(rsi, Address(method,Method::const_offset())); // get ConstMethod*
1293 __ lea(rsi, Address(rsi,ConstMethod::codes_offset())); // get codebase
1294
1295 // handle exceptions (exception handling will handle unlocking!)
1296 { Label L;
1297 __ cmpptr(Address(thread, Thread::pending_exception_offset()), (int32_t)NULL_WORD);
1298 __ jcc(Assembler::zero, L);
1299 // Note: At some point we may want to unify this with the code used in call_VM_base();
1300 // i.e., we should use the StubRoutines::forward_exception code. For now this
1301 // doesn't work here because the rsp is not correctly set at this point.
1302 __ MacroAssembler::call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::throw_pending_exception));
1303 __ should_not_reach_here();
1304 __ bind(L);
1305 }
1306
1307 // do unlocking if necessary
1308 { Label L;
1309 __ movl(t, Address(method, Method::access_flags_offset()));
1310 __ testl(t, JVM_ACC_SYNCHRONIZED);
1311 __ jcc(Assembler::zero, L);
1312 // the code below should be shared with interpreter macro assembler implementation
1313 { Label unlock;
1314 // BasicObjectLock will be first in list, since this is a synchronized method. However, need
1315 // to check that the object has not been unlocked by an explicit monitorexit bytecode.
1316 const Address monitor(rbp, frame::interpreter_frame_initial_sp_offset * wordSize - (int)sizeof(BasicObjectLock));
1317
1318 __ lea(rdx, monitor); // address of first monitor
1319
1320 __ movptr(t, Address(rdx, BasicObjectLock::obj_offset_in_bytes()));
1321 __ testptr(t, t);
1322 __ jcc(Assembler::notZero, unlock);
1323
1324 // Entry already unlocked, need to throw exception
1325 __ MacroAssembler::call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::throw_illegal_monitor_state_exception));
1326 __ should_not_reach_here();
1327
1328 __ bind(unlock);
1329 __ unlock_object(rdx);
1330 }
1331 __ bind(L);
1332 }
1333
1334 // jvmti/dtrace support
1335 // Note: This must happen _after_ handling/throwing any exceptions since
1336 // the exception handler code notifies the runtime of method exits
1337 // too. If this happens before, method entry/exit notifications are
1338 // not properly paired (was bug - gri 11/22/99).
1339 __ notify_method_exit(vtos, InterpreterMacroAssembler::NotifyJVMTI);
1340
1341 // restore potential result in rdx:rax, call result handler to restore potential result in ST0 & handle result
1342 __ pop(ltos);
1343 __ movptr(t, Address(rbp, frame::interpreter_frame_result_handler_offset*wordSize));
1344 __ call(t);
1345
1346 // remove activation
1347 __ movptr(t, Address(rbp, frame::interpreter_frame_sender_sp_offset * wordSize)); // get sender sp
1348 __ leave(); // remove frame anchor
1349 __ pop(rdi); // get return address
1350 __ mov(rsp, t); // set sp to sender sp
1351 __ jmp(rdi);
1352
1353 if (inc_counter) {
1354 // Handle overflow of counter and compile method
1355 __ bind(invocation_counter_overflow);
1356 generate_counter_overflow(&continue_after_compile);
1357 }
1358
1359 return entry_point;
1360 }
1361
1362 //
1363 // Generic interpreted method entry to (asm) interpreter
1364 //
1365 address InterpreterGenerator::generate_normal_entry(bool synchronized) {
1366 // determine code generation flags
1367 bool inc_counter = UseCompiler || CountCompiledCalls || LogTouchedMethods;
1368
1369 // rbx,: Method*
1370 // rsi: sender sp
1371 address entry_point = __ pc();
1372
1373 const Address constMethod (rbx, Method::const_offset());
1374 const Address access_flags (rbx, Method::access_flags_offset());
1375 const Address size_of_parameters(rdx, ConstMethod::size_of_parameters_offset());
1376 const Address size_of_locals (rdx, ConstMethod::size_of_locals_offset());
1377
1378 // get parameter size (always needed)
1379 __ movptr(rdx, constMethod);
1380 __ load_unsigned_short(rcx, size_of_parameters);
1381
1382 // rbx,: Method*
1383 // rcx: size of parameters
1384
1385 // rsi: sender_sp (could differ from sp+wordSize if we were called via c2i )
1386
1387 __ load_unsigned_short(rdx, size_of_locals); // get size of locals in words
1388 __ subl(rdx, rcx); // rdx = no. of additional locals
1389
1390 // see if we've got enough room on the stack for locals plus overhead.
1391 generate_stack_overflow_check();
1392
1393 // get return address
1394 __ pop(rax);
1395
1396 // compute beginning of parameters (rdi)
1397 __ lea(rdi, Address(rsp, rcx, Interpreter::stackElementScale(), -wordSize));
1398
1399 // rdx - # of additional locals
1400 // allocate space for locals
1401 // explicitly initialize locals
1402 {
1403 Label exit, loop;
1404 __ testl(rdx, rdx);
1405 __ jcc(Assembler::lessEqual, exit); // do nothing if rdx <= 0
1406 __ bind(loop);
1407 __ push((int32_t)NULL_WORD); // initialize local variables
1408 __ decrement(rdx); // until everything initialized
1409 __ jcc(Assembler::greater, loop);
1410 __ bind(exit);
1411 }
1412
1413 // initialize fixed part of activation frame
1414 generate_fixed_frame(false);
1415
1416 // make sure method is not native & not abstract
1417 #ifdef ASSERT
1418 __ movl(rax, access_flags);
1419 {
1420 Label L;
1421 __ testl(rax, JVM_ACC_NATIVE);
1422 __ jcc(Assembler::zero, L);
1423 __ stop("tried to execute native method as non-native");
1424 __ bind(L);
1425 }
1426 { Label L;
1427 __ testl(rax, JVM_ACC_ABSTRACT);
1428 __ jcc(Assembler::zero, L);
1429 __ stop("tried to execute abstract method in interpreter");
1430 __ bind(L);
1431 }
1432 #endif
1433
1434 // Since at this point in the method invocation the exception handler
1435 // would try to exit the monitor of synchronized methods which hasn't
1436 // been entered yet, we set the thread local variable
1437 // _do_not_unlock_if_synchronized to true. The remove_activation will
1438 // check this flag.
1439
1440 __ get_thread(rax);
1441 const Address do_not_unlock_if_synchronized(rax,
1442 in_bytes(JavaThread::do_not_unlock_if_synchronized_offset()));
1443 __ movbool(do_not_unlock_if_synchronized, true);
1444
1445 __ profile_parameters_type(rax, rcx, rdx);
1446 // increment invocation count & check for overflow
1447 Label invocation_counter_overflow;
1448 Label profile_method;
1449 Label profile_method_continue;
1450 if (inc_counter) {
1451 generate_counter_incr(&invocation_counter_overflow, &profile_method, &profile_method_continue);
1452 if (ProfileInterpreter) {
1453 __ bind(profile_method_continue);
1454 }
1455 }
1456 Label continue_after_compile;
1457 __ bind(continue_after_compile);
1458
1459 bang_stack_shadow_pages(false);
1460
1461 // reset the _do_not_unlock_if_synchronized flag
1462 __ get_thread(rax);
1463 __ movbool(do_not_unlock_if_synchronized, false);
1464
1465 // check for synchronized methods
1466 // Must happen AFTER invocation_counter check and stack overflow check,
1467 // so method is not locked if overflows.
1468 //
1469 if (synchronized) {
1470 // Allocate monitor and lock method
1471 lock_method();
1472 } else {
1473 // no synchronization necessary
1474 #ifdef ASSERT
1475 { Label L;
1476 __ movl(rax, access_flags);
1477 __ testl(rax, JVM_ACC_SYNCHRONIZED);
1478 __ jcc(Assembler::zero, L);
1479 __ stop("method needs synchronization");
1480 __ bind(L);
1481 }
1482 #endif
1483 }
1484
1485 // start execution
1486 #ifdef ASSERT
1487 { Label L;
1488 const Address monitor_block_top (rbp,
1489 frame::interpreter_frame_monitor_block_top_offset * wordSize);
1490 __ movptr(rax, monitor_block_top);
1491 __ cmpptr(rax, rsp);
1492 __ jcc(Assembler::equal, L);
1493 __ stop("broken stack frame setup in interpreter");
1494 __ bind(L);
1495 }
1496 #endif
1497
1498 // jvmti support
1499 __ notify_method_entry();
1500
1501 __ dispatch_next(vtos);
1502
1503 // invocation counter overflow
1504 if (inc_counter) {
1505 if (ProfileInterpreter) {
1506 // We have decided to profile this method in the interpreter
1507 __ bind(profile_method);
1508 __ call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::profile_method));
1509 __ set_method_data_pointer_for_bcp();
1510 __ get_method(rbx);
1511 __ jmp(profile_method_continue);
1512 }
1513 // Handle overflow of counter and compile method
1514 __ bind(invocation_counter_overflow);
1515 generate_counter_overflow(&continue_after_compile);
1516 }
1517
1518 return entry_point;
1519 }
1520
1521
1522 // These should never be compiled since the interpreter will prefer
1523 // the compiled version to the intrinsic version.
1524 bool AbstractInterpreter::can_be_compiled(methodHandle m) {
1525 switch (method_kind(m)) {
1526 case Interpreter::java_lang_math_sin : // fall thru
1527 case Interpreter::java_lang_math_cos : // fall thru
1528 case Interpreter::java_lang_math_tan : // fall thru
1529 case Interpreter::java_lang_math_abs : // fall thru
1530 case Interpreter::java_lang_math_log : // fall thru
1531 case Interpreter::java_lang_math_log10 : // fall thru
1532 case Interpreter::java_lang_math_sqrt : // fall thru
1533 case Interpreter::java_lang_math_pow : // fall thru
1534 case Interpreter::java_lang_math_exp :
1535 return false;
1536 default:
1537 return true;
1538 }
1539 }
1540
1541 // How much stack a method activation needs in words.
1542 int AbstractInterpreter::size_top_interpreter_activation(Method* method) {
1543
1544 const int stub_code = 4; // see generate_call_stub
1545 // Save space for one monitor to get into the interpreted method in case
1546 // the method is synchronized
1547 int monitor_size = method->is_synchronized() ?
1548 1*frame::interpreter_frame_monitor_size() : 0;
1549
1550 // total overhead size: entry_size + (saved rbp, thru expr stack bottom).
1551 // be sure to change this if you add/subtract anything to/from the overhead area
1552 const int overhead_size = -frame::interpreter_frame_initial_sp_offset;
1553
1554 const int method_stack = (method->max_locals() + method->max_stack()) *
1555 Interpreter::stackElementWords;
1556 return overhead_size + method_stack + stub_code;
1557 }
1558
1559 //------------------------------------------------------------------------------------------------------------------------
1560 // Exceptions
1561
1562 void TemplateInterpreterGenerator::generate_throw_exception() {
1563 // Entry point in previous activation (i.e., if the caller was interpreted)
1564 Interpreter::_rethrow_exception_entry = __ pc();
1565 const Register thread = rcx;
1566
1567 // Restore sp to interpreter_frame_last_sp even though we are going
1568 // to empty the expression stack for the exception processing.
1569 __ movptr(Address(rbp, frame::interpreter_frame_last_sp_offset * wordSize), NULL_WORD);
1570 // rax,: exception
1571 // rdx: return address/pc that threw exception
1572 __ restore_bcp(); // rsi points to call/send
1573 __ restore_locals();
1574
1575 // Entry point for exceptions thrown within interpreter code
1576 Interpreter::_throw_exception_entry = __ pc();
1577 // expression stack is undefined here
1578 // rax,: exception
1579 // rsi: exception bcp
1580 __ verify_oop(rax);
1581
1582 // expression stack must be empty before entering the VM in case of an exception
1583 __ empty_expression_stack();
1584 __ empty_FPU_stack();
1585 // find exception handler address and preserve exception oop
1586 __ call_VM(rdx, CAST_FROM_FN_PTR(address, InterpreterRuntime::exception_handler_for_exception), rax);
1587 // rax,: exception handler entry point
1588 // rdx: preserved exception oop
1589 // rsi: bcp for exception handler
1590 __ push_ptr(rdx); // push exception which is now the only value on the stack
1591 __ jmp(rax); // jump to exception handler (may be _remove_activation_entry!)
1592
1593 // If the exception is not handled in the current frame the frame is removed and
1594 // the exception is rethrown (i.e. exception continuation is _rethrow_exception).
1595 //
1596 // Note: At this point the bci is still the bxi for the instruction which caused
1597 // the exception and the expression stack is empty. Thus, for any VM calls
1598 // at this point, GC will find a legal oop map (with empty expression stack).
1599
1600 // In current activation
1601 // tos: exception
1602 // rsi: exception bcp
1603
1604 //
1605 // JVMTI PopFrame support
1606 //
1607
1608 Interpreter::_remove_activation_preserving_args_entry = __ pc();
1609 __ empty_expression_stack();
1610 __ empty_FPU_stack();
1611 // Set the popframe_processing bit in pending_popframe_condition indicating that we are
1612 // currently handling popframe, so that call_VMs that may happen later do not trigger new
1613 // popframe handling cycles.
1614 __ get_thread(thread);
1615 __ movl(rdx, Address(thread, JavaThread::popframe_condition_offset()));
1616 __ orl(rdx, JavaThread::popframe_processing_bit);
1617 __ movl(Address(thread, JavaThread::popframe_condition_offset()), rdx);
1618
1619 {
1620 // Check to see whether we are returning to a deoptimized frame.
1621 // (The PopFrame call ensures that the caller of the popped frame is
1622 // either interpreted or compiled and deoptimizes it if compiled.)
1623 // In this case, we can't call dispatch_next() after the frame is
1624 // popped, but instead must save the incoming arguments and restore
1625 // them after deoptimization has occurred.
1626 //
1627 // Note that we don't compare the return PC against the
1628 // deoptimization blob's unpack entry because of the presence of
1629 // adapter frames in C2.
1630 Label caller_not_deoptimized;
1631 __ movptr(rdx, Address(rbp, frame::return_addr_offset * wordSize));
1632 __ super_call_VM_leaf(CAST_FROM_FN_PTR(address, InterpreterRuntime::interpreter_contains), rdx);
1633 __ testl(rax, rax);
1634 __ jcc(Assembler::notZero, caller_not_deoptimized);
1635
1636 // Compute size of arguments for saving when returning to deoptimized caller
1637 __ get_method(rax);
1638 __ movptr(rax, Address(rax, Method::const_offset()));
1639 __ load_unsigned_short(rax, Address(rax, ConstMethod::size_of_parameters_offset()));
1640 __ shlptr(rax, Interpreter::logStackElementSize);
1641 __ restore_locals();
1642 __ subptr(rdi, rax);
1643 __ addptr(rdi, wordSize);
1644 // Save these arguments
1645 __ get_thread(thread);
1646 __ super_call_VM_leaf(CAST_FROM_FN_PTR(address, Deoptimization::popframe_preserve_args), thread, rax, rdi);
1647
1648 __ remove_activation(vtos, rdx,
1649 /* throw_monitor_exception */ false,
1650 /* install_monitor_exception */ false,
1651 /* notify_jvmdi */ false);
1652
1653 // Inform deoptimization that it is responsible for restoring these arguments
1654 __ get_thread(thread);
1655 __ movl(Address(thread, JavaThread::popframe_condition_offset()), JavaThread::popframe_force_deopt_reexecution_bit);
1656
1657 // Continue in deoptimization handler
1658 __ jmp(rdx);
1659
1660 __ bind(caller_not_deoptimized);
1661 }
1662
1663 __ remove_activation(vtos, rdx,
1664 /* throw_monitor_exception */ false,
1665 /* install_monitor_exception */ false,
1666 /* notify_jvmdi */ false);
1667
1668 // Finish with popframe handling
1669 // A previous I2C followed by a deoptimization might have moved the
1670 // outgoing arguments further up the stack. PopFrame expects the
1671 // mutations to those outgoing arguments to be preserved and other
1672 // constraints basically require this frame to look exactly as
1673 // though it had previously invoked an interpreted activation with
1674 // no space between the top of the expression stack (current
1675 // last_sp) and the top of stack. Rather than force deopt to
1676 // maintain this kind of invariant all the time we call a small
1677 // fixup routine to move the mutated arguments onto the top of our
1678 // expression stack if necessary.
1679 __ mov(rax, rsp);
1680 __ movptr(rbx, Address(rbp, frame::interpreter_frame_last_sp_offset * wordSize));
1681 __ get_thread(thread);
1682 // PC must point into interpreter here
1683 __ set_last_Java_frame(thread, noreg, rbp, __ pc());
1684 __ super_call_VM_leaf(CAST_FROM_FN_PTR(address, InterpreterRuntime::popframe_move_outgoing_args), thread, rax, rbx);
1685 __ get_thread(thread);
1686 __ reset_last_Java_frame(thread, true, true);
1687 // Restore the last_sp and null it out
1688 __ movptr(rsp, Address(rbp, frame::interpreter_frame_last_sp_offset * wordSize));
1689 __ movptr(Address(rbp, frame::interpreter_frame_last_sp_offset * wordSize), NULL_WORD);
1690
1691 __ restore_bcp();
1692 __ restore_locals();
1693 // The method data pointer was incremented already during
1694 // call profiling. We have to restore the mdp for the current bcp.
1695 if (ProfileInterpreter) {
1696 __ set_method_data_pointer_for_bcp();
1697 }
1698
1699 // Clear the popframe condition flag
1700 __ get_thread(thread);
1701 __ movl(Address(thread, JavaThread::popframe_condition_offset()), JavaThread::popframe_inactive);
1702
1703 #if INCLUDE_JVMTI
1704 {
1705 Label L_done;
1706 const Register local0 = rdi;
1707
1708 __ cmpb(Address(rsi, 0), Bytecodes::_invokestatic);
1709 __ jcc(Assembler::notEqual, L_done);
1710
1711 // The member name argument must be restored if _invokestatic is re-executed after a PopFrame call.
1712 // Detect such a case in the InterpreterRuntime function and return the member name argument, or NULL.
1713
1714 __ get_method(rdx);
1715 __ movptr(rax, Address(local0, 0));
1716 __ call_VM(rax, CAST_FROM_FN_PTR(address, InterpreterRuntime::member_name_arg_or_null), rax, rdx, rsi);
1717
1718 __ testptr(rax, rax);
1719 __ jcc(Assembler::zero, L_done);
1720
1721 __ movptr(Address(rbx, 0), rax);
1722 __ bind(L_done);
1723 }
1724 #endif // INCLUDE_JVMTI
1725
1726 __ dispatch_next(vtos);
1727 // end of PopFrame support
1728
1729 Interpreter::_remove_activation_entry = __ pc();
1730
1731 // preserve exception over this code sequence
1732 __ pop_ptr(rax);
1733 __ get_thread(thread);
1734 __ movptr(Address(thread, JavaThread::vm_result_offset()), rax);
1735 // remove the activation (without doing throws on illegalMonitorExceptions)
1736 __ remove_activation(vtos, rdx, false, true, false);
1737 // restore exception
1738 __ get_thread(thread);
1739 __ get_vm_result(rax, thread);
1740
1741 // Inbetween activations - previous activation type unknown yet
1742 // compute continuation point - the continuation point expects
1743 // the following registers set up:
1744 //
1745 // rax: exception
1746 // rdx: return address/pc that threw exception
1747 // rsp: expression stack of caller
1748 // rbp: rbp, of caller
1749 __ push(rax); // save exception
1750 __ push(rdx); // save return address
1751 __ super_call_VM_leaf(CAST_FROM_FN_PTR(address, SharedRuntime::exception_handler_for_return_address), thread, rdx);
1752 __ mov(rbx, rax); // save exception handler
1753 __ pop(rdx); // restore return address
1754 __ pop(rax); // restore exception
1755 // Note that an "issuing PC" is actually the next PC after the call
1756 __ jmp(rbx); // jump to exception handler of caller
1757 }
1758
1759
1760 //
1761 // JVMTI ForceEarlyReturn support
1762 //
1763 address TemplateInterpreterGenerator::generate_earlyret_entry_for(TosState state) {
1764 address entry = __ pc();
1765 const Register thread = rcx;
1766
1767 __ restore_bcp();
1768 __ restore_locals();
1769 __ empty_expression_stack();
1770 __ empty_FPU_stack();
1771 __ load_earlyret_value(state);
1772
1773 __ get_thread(thread);
1774 __ movptr(rcx, Address(thread, JavaThread::jvmti_thread_state_offset()));
1775 const Address cond_addr(rcx, JvmtiThreadState::earlyret_state_offset());
1776
1777 // Clear the earlyret state
1778 __ movl(cond_addr, JvmtiThreadState::earlyret_inactive);
1779
1780 __ remove_activation(state, rsi,
1781 false, /* throw_monitor_exception */
1782 false, /* install_monitor_exception */
1783 true); /* notify_jvmdi */
1784 __ jmp(rsi);
1785 return entry;
1786 } // end of ForceEarlyReturn support
1787
1788
1789 //------------------------------------------------------------------------------------------------------------------------
1790 // Helper for vtos entry point generation
1791
1792 void TemplateInterpreterGenerator::set_vtos_entry_points (Template* t, address& bep, address& cep, address& sep, address& aep, address& iep, address& lep, address& fep, address& dep, address& vep) {
1793 assert(t->is_valid() && t->tos_in() == vtos, "illegal template");
1794 Label L;
1795 fep = __ pc(); __ push(ftos); __ jmp(L);
1796 dep = __ pc(); __ push(dtos); __ jmp(L);
1797 lep = __ pc(); __ push(ltos); __ jmp(L);
1798 aep = __ pc(); __ push(atos); __ jmp(L);
1799 bep = cep = sep = // fall through
1800 iep = __ pc(); __ push(itos); // fall through
1801 vep = __ pc(); __ bind(L); // fall through
1802 generate_and_dispatch(t);
1803 }
1804
1805 //------------------------------------------------------------------------------------------------------------------------
1806 // Generation of individual instructions
1807
1808 // helpers for generate_and_dispatch
1809
1810
1811
1812 InterpreterGenerator::InterpreterGenerator(StubQueue* code)
1813 : TemplateInterpreterGenerator(code) {
1814 generate_all(); // down here so it can be "virtual"
1815 }
1816
1817 //------------------------------------------------------------------------------------------------------------------------
1818
1819 // Non-product code
1820 #ifndef PRODUCT
1821 address TemplateInterpreterGenerator::generate_trace_code(TosState state) {
1822 address entry = __ pc();
1823
1824 // prepare expression stack
1825 __ pop(rcx); // pop return address so expression stack is 'pure'
1826 __ push(state); // save tosca
1827
1828 // pass tosca registers as arguments & call tracer
1829 __ call_VM(noreg, CAST_FROM_FN_PTR(address, SharedRuntime::trace_bytecode), rcx, rax, rdx);
1830 __ mov(rcx, rax); // make sure return address is not destroyed by pop(state)
1831 __ pop(state); // restore tosca
1832
1833 // return
1834 __ jmp(rcx);
1835
1836 return entry;
1837 }
1838
1839
1840 void TemplateInterpreterGenerator::count_bytecode() {
1841 __ incrementl(ExternalAddress((address) &BytecodeCounter::_counter_value));
1842 }
1843
1844
1845 void TemplateInterpreterGenerator::histogram_bytecode(Template* t) {
1846 __ incrementl(ExternalAddress((address) &BytecodeHistogram::_counters[t->bytecode()]));
1847 }
1848
1849
1850 void TemplateInterpreterGenerator::histogram_bytecode_pair(Template* t) {
1851 __ mov32(ExternalAddress((address) &BytecodePairHistogram::_index), rbx);
1852 __ shrl(rbx, BytecodePairHistogram::log2_number_of_codes);
1853 __ orl(rbx, ((int)t->bytecode()) << BytecodePairHistogram::log2_number_of_codes);
1854 ExternalAddress table((address) BytecodePairHistogram::_counters);
1855 Address index(noreg, rbx, Address::times_4);
1856 __ incrementl(ArrayAddress(table, index));
1857 }
1858
1859
1860 void TemplateInterpreterGenerator::trace_bytecode(Template* t) {
1861 // Call a little run-time stub to avoid blow-up for each bytecode.
1862 // The run-time runtime saves the right registers, depending on
1863 // the tosca in-state for the given template.
1864 assert(Interpreter::trace_code(t->tos_in()) != NULL,
1865 "entry must have been generated");
1866 __ call(RuntimeAddress(Interpreter::trace_code(t->tos_in())));
1867 }
1868
1869
1870 void TemplateInterpreterGenerator::stop_interpreter_at() {
1871 Label L;
1872 __ cmp32(ExternalAddress((address) &BytecodeCounter::_counter_value),
1873 StopInterpreterAt);
1874 __ jcc(Assembler::notEqual, L);
1875 __ int3();
1876 __ bind(L);
1877 }
1878 #endif // !PRODUCT
1879 #endif // CC_INTERP