1 /*
2 * Copyright (c) 2003, 2018, 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 "compiler/disassembler.hpp"
28 #include "gc/shared/barrierSetAssembler.hpp"
29 #include "interpreter/bytecodeHistogram.hpp"
30 #include "interpreter/interp_masm.hpp"
31 #include "interpreter/interpreter.hpp"
32 #include "interpreter/interpreterRuntime.hpp"
33 #include "interpreter/templateInterpreterGenerator.hpp"
34 #include "interpreter/templateTable.hpp"
35 #include "oops/arrayOop.hpp"
36 #include "oops/methodData.hpp"
37 #include "oops/method.hpp"
38 #include "oops/oop.inline.hpp"
39 #include "oops/valueKlass.hpp"
40 #include "prims/jvmtiExport.hpp"
41 #include "prims/jvmtiThreadState.hpp"
42 #include "runtime/arguments.hpp"
43 #include "runtime/deoptimization.hpp"
44 #include "runtime/frame.inline.hpp"
45 #include "runtime/sharedRuntime.hpp"
46 #include "runtime/stubRoutines.hpp"
47 #include "runtime/synchronizer.hpp"
48 #include "runtime/timer.hpp"
49 #include "runtime/vframeArray.hpp"
50 #include "utilities/debug.hpp"
51 #include "utilities/macros.hpp"
52
53 #define __ Disassembler::hook<InterpreterMacroAssembler>(__FILE__, __LINE__, _masm)->
54
55 // Size of interpreter code. Increase if too small. Interpreter will
56 // fail with a guarantee ("not enough space for interpreter generation");
57 // if too small.
58 // Run with +PrintInterpreter to get the VM to print out the size.
59 // Max size with JVMTI
60 #ifdef AMD64
61 int TemplateInterpreter::InterpreterCodeSize = JVMCI_ONLY(280) NOT_JVMCI(268) * 1024;
62 #else
63 int TemplateInterpreter::InterpreterCodeSize = 224 * 1024;
64 #endif // AMD64
65
66 // Global Register Names
67 static const Register rbcp = LP64_ONLY(r13) NOT_LP64(rsi);
68 static const Register rlocals = LP64_ONLY(r14) NOT_LP64(rdi);
69
70 const int method_offset = frame::interpreter_frame_method_offset * wordSize;
71 const int bcp_offset = frame::interpreter_frame_bcp_offset * wordSize;
72 const int locals_offset = frame::interpreter_frame_locals_offset * wordSize;
73
74
75 //-----------------------------------------------------------------------------
76
77 address TemplateInterpreterGenerator::generate_StackOverflowError_handler() {
78 address entry = __ pc();
79
80 #ifdef ASSERT
81 {
82 Label L;
83 __ lea(rax, Address(rbp,
84 frame::interpreter_frame_monitor_block_top_offset *
85 wordSize));
86 __ cmpptr(rax, rsp); // rax = maximal rsp for current rbp (stack
87 // grows negative)
88 __ jcc(Assembler::aboveEqual, L); // check if frame is complete
89 __ stop ("interpreter frame not set up");
90 __ bind(L);
91 }
92 #endif // ASSERT
93 // Restore bcp under the assumption that the current frame is still
94 // interpreted
95 __ restore_bcp();
96
97 // expression stack must be empty before entering the VM if an
98 // exception happened
99 __ empty_expression_stack();
100 // throw exception
101 __ call_VM(noreg,
102 CAST_FROM_FN_PTR(address,
103 InterpreterRuntime::throw_StackOverflowError));
104 return entry;
105 }
106
107 address TemplateInterpreterGenerator::generate_ArrayIndexOutOfBounds_handler() {
108 address entry = __ pc();
109 // The expression stack must be empty before entering the VM if an
110 // exception happened.
111 __ empty_expression_stack();
112
113 // Setup parameters.
114 // ??? convention: expect aberrant index in register ebx/rbx.
115 // Pass array to create more detailed exceptions.
116 Register rarg = NOT_LP64(rax) LP64_ONLY(c_rarg1);
117 __ call_VM(noreg,
118 CAST_FROM_FN_PTR(address,
119 InterpreterRuntime::
120 throw_ArrayIndexOutOfBoundsException),
121 rarg, rbx);
122 return entry;
123 }
124
125 address TemplateInterpreterGenerator::generate_ClassCastException_handler() {
126 address entry = __ pc();
127
128 // object is at TOS
129 Register rarg = NOT_LP64(rax) LP64_ONLY(c_rarg1);
130 __ pop(rarg);
131
132 // expression stack must be empty before entering the VM if an
133 // exception happened
134 __ empty_expression_stack();
135
136 __ call_VM(noreg,
137 CAST_FROM_FN_PTR(address,
138 InterpreterRuntime::
139 throw_ClassCastException),
140 rarg);
141 return entry;
142 }
143
144 address TemplateInterpreterGenerator::generate_exception_handler_common(
145 const char* name, const char* message, bool pass_oop) {
146 assert(!pass_oop || message == NULL, "either oop or message but not both");
147 address entry = __ pc();
148
149 Register rarg = NOT_LP64(rax) LP64_ONLY(c_rarg1);
150 Register rarg2 = NOT_LP64(rbx) LP64_ONLY(c_rarg2);
151
152 if (pass_oop) {
153 // object is at TOS
154 __ pop(rarg2);
155 }
156 // expression stack must be empty before entering the VM if an
157 // exception happened
158 __ empty_expression_stack();
159 // setup parameters
160 __ lea(rarg, ExternalAddress((address)name));
161 if (pass_oop) {
162 __ call_VM(rax, CAST_FROM_FN_PTR(address,
163 InterpreterRuntime::
164 create_klass_exception),
165 rarg, rarg2);
166 } else {
167 __ lea(rarg2, ExternalAddress((address)message));
168 __ call_VM(rax,
169 CAST_FROM_FN_PTR(address, InterpreterRuntime::create_exception),
170 rarg, rarg2);
171 }
172 // throw exception
173 __ jump(ExternalAddress(Interpreter::throw_exception_entry()));
174 return entry;
175 }
176
177 address TemplateInterpreterGenerator::generate_return_entry_for(TosState state, int step, size_t index_size) {
178 address entry = __ pc();
179
180 #ifndef _LP64
181 #ifdef COMPILER2
182 // The FPU stack is clean if UseSSE >= 2 but must be cleaned in other cases
183 if ((state == ftos && UseSSE < 1) || (state == dtos && UseSSE < 2)) {
184 for (int i = 1; i < 8; i++) {
185 __ ffree(i);
186 }
187 } else if (UseSSE < 2) {
188 __ empty_FPU_stack();
189 }
190 #endif // COMPILER2
191 if ((state == ftos && UseSSE < 1) || (state == dtos && UseSSE < 2)) {
192 __ MacroAssembler::verify_FPU(1, "generate_return_entry_for compiled");
193 } else {
194 __ MacroAssembler::verify_FPU(0, "generate_return_entry_for compiled");
195 }
196
197 if (state == ftos) {
198 __ MacroAssembler::verify_FPU(UseSSE >= 1 ? 0 : 1, "generate_return_entry_for in interpreter");
199 } else if (state == dtos) {
200 __ MacroAssembler::verify_FPU(UseSSE >= 2 ? 0 : 1, "generate_return_entry_for in interpreter");
201 }
202 #endif // _LP64
203
204 // Restore stack bottom in case i2c adjusted stack
205 __ movptr(rsp, Address(rbp, frame::interpreter_frame_last_sp_offset * wordSize));
206 // and NULL it as marker that esp is now tos until next java call
207 __ movptr(Address(rbp, frame::interpreter_frame_last_sp_offset * wordSize), (int32_t)NULL_WORD);
208
209 if (/*state == qtos*/ false && ValueTypeReturnedAsFields) {
210 #ifndef _LP64
211 __ super_call_VM_leaf(StubRoutines::store_value_type_fields_to_buf());
212 #else
213 // A value type is being returned. If fields are in registers we
214 // need to allocate a value type instance and initialize it with
215 // the value of the fields.
216 Label skip, slow_case;
217 // We only need a new buffered value if a new one is not returned
218 __ testptr(rax, 1);
219 __ jcc(Assembler::zero, skip);
220
221 // Try to allocate a new buffered value (from the heap)
222 if (UseTLAB) {
223 __ mov(rbx, rax);
224 __ andptr(rbx, -2);
225
226 __ movl(r14, Address(rbx, Klass::layout_helper_offset()));
227
228 __ movptr(r13, Address(r15_thread, in_bytes(JavaThread::tlab_top_offset())));
229 __ lea(r14, Address(r13, r14, Address::times_1));
230 __ cmpptr(r14, Address(r15_thread, in_bytes(JavaThread::tlab_end_offset())));
231 __ jcc(Assembler::above, slow_case);
232 __ movptr(Address(r15_thread, in_bytes(JavaThread::tlab_top_offset())), r14);
233
234 if (UseBiasedLocking) {
235 __ movptr(rax, Address(rbx, Klass::prototype_header_offset()));
236 __ movptr(Address(r13, oopDesc::mark_offset_in_bytes ()), rax);
237 } else {
238 __ movptr(Address(r13, oopDesc::mark_offset_in_bytes ()),
239 (intptr_t)markOopDesc::prototype());
240 }
241 __ xorl(rax, rax); // use zero reg to clear memory (shorter code)
242 __ store_klass_gap(r13, rax); // zero klass gap for compressed oops
243 __ mov(rax, rbx);
244 __ store_klass(r13, rbx); // klass
245
246 // We have our new buffered value, initialize its fields with a
247 // value class specific handler
248 __ movptr(rbx, Address(rax, ValueKlass::pack_handler_offset()));
249 __ mov(rax, r13);
250 __ call(rbx);
251 __ jmp(skip);
252 }
253
254 __ bind(slow_case);
255 // We failed to allocate a new value, fall back to a runtime
256 // call. Some oop field may be live in some registers but we can't
257 // tell. That runtime call will take care of preserving them
258 // across a GC if there's one.
259 __ super_call_VM_leaf(StubRoutines::store_value_type_fields_to_buf());
260 __ bind(skip);
261 #endif
262 }
263
264 __ restore_bcp();
265 __ restore_locals();
266
267 if (state == atos) {
268 Register mdp = rbx;
269 Register tmp = rcx;
270 __ profile_return_type(mdp, rax, tmp);
271 }
272
273 const Register cache = rbx;
274 const Register index = rcx;
275 __ get_cache_and_index_at_bcp(cache, index, 1, index_size);
276
277 const Register flags = cache;
278 __ movl(flags, Address(cache, index, Address::times_ptr, ConstantPoolCache::base_offset() + ConstantPoolCacheEntry::flags_offset()));
279 __ andl(flags, ConstantPoolCacheEntry::parameter_size_mask);
280 __ lea(rsp, Address(rsp, flags, Interpreter::stackElementScale()));
281
282 const Register java_thread = NOT_LP64(rcx) LP64_ONLY(r15_thread);
283 if (JvmtiExport::can_pop_frame()) {
284 NOT_LP64(__ get_thread(java_thread));
285 __ check_and_handle_popframe(java_thread);
286 }
287 if (JvmtiExport::can_force_early_return()) {
288 NOT_LP64(__ get_thread(java_thread));
289 __ check_and_handle_earlyret(java_thread);
290 }
291
292 __ dispatch_next(state, step);
293
294 return entry;
295 }
296
297
298 address TemplateInterpreterGenerator::generate_deopt_entry_for(TosState state, int step, address continuation) {
299 address entry = __ pc();
300
301 #ifndef _LP64
302 if (state == ftos) {
303 __ MacroAssembler::verify_FPU(UseSSE >= 1 ? 0 : 1, "generate_deopt_entry_for in interpreter");
304 } else if (state == dtos) {
305 __ MacroAssembler::verify_FPU(UseSSE >= 2 ? 0 : 1, "generate_deopt_entry_for in interpreter");
306 }
307 #endif // _LP64
308
309 // NULL last_sp until next java call
310 __ movptr(Address(rbp, frame::interpreter_frame_last_sp_offset * wordSize), (int32_t)NULL_WORD);
311 __ restore_bcp();
312 __ restore_locals();
313 const Register thread = NOT_LP64(rcx) LP64_ONLY(r15_thread);
314 NOT_LP64(__ get_thread(thread));
315 #if INCLUDE_JVMCI
316 // Check if we need to take lock at entry of synchronized method. This can
317 // only occur on method entry so emit it only for vtos with step 0.
318 if ((EnableJVMCI || UseAOT) && state == vtos && step == 0) {
319 Label L;
320 __ cmpb(Address(thread, JavaThread::pending_monitorenter_offset()), 0);
321 __ jcc(Assembler::zero, L);
322 // Clear flag.
323 __ movb(Address(thread, JavaThread::pending_monitorenter_offset()), 0);
324 // Satisfy calling convention for lock_method().
325 __ get_method(rbx);
326 // Take lock.
327 lock_method();
328 __ bind(L);
329 } else {
330 #ifdef ASSERT
331 if (EnableJVMCI) {
332 Label L;
333 __ cmpb(Address(r15_thread, JavaThread::pending_monitorenter_offset()), 0);
334 __ jcc(Assembler::zero, L);
335 __ stop("unexpected pending monitor in deopt entry");
336 __ bind(L);
337 }
338 #endif
339 }
340 #endif
341 // handle exceptions
342 {
343 Label L;
344 __ cmpptr(Address(thread, Thread::pending_exception_offset()), (int32_t) NULL_WORD);
345 __ jcc(Assembler::zero, L);
346 __ call_VM(noreg,
347 CAST_FROM_FN_PTR(address,
348 InterpreterRuntime::throw_pending_exception));
349 __ should_not_reach_here();
350 __ bind(L);
351 }
352 if (continuation == NULL) {
353 __ dispatch_next(state, step);
354 } else {
355 __ jump_to_entry(continuation);
356 }
357 return entry;
358 }
359
360 address TemplateInterpreterGenerator::generate_result_handler_for(
361 BasicType type) {
362 address entry = __ pc();
363 switch (type) {
364 case T_BOOLEAN: __ c2bool(rax); break;
365 #ifndef _LP64
366 case T_CHAR : __ andptr(rax, 0xFFFF); break;
367 #else
368 case T_CHAR : __ movzwl(rax, rax); break;
369 #endif // _LP64
370 case T_BYTE : __ sign_extend_byte(rax); break;
371 case T_SHORT : __ sign_extend_short(rax); break;
372 case T_INT : /* nothing to do */ break;
373 case T_LONG : /* nothing to do */ break;
374 case T_VOID : /* nothing to do */ break;
375 #ifndef _LP64
376 case T_DOUBLE :
377 case T_FLOAT :
378 { const Register t = InterpreterRuntime::SignatureHandlerGenerator::temp();
379 __ pop(t); // remove return address first
380 // Must return a result for interpreter or compiler. In SSE
381 // mode, results are returned in xmm0 and the FPU stack must
382 // be empty.
383 if (type == T_FLOAT && UseSSE >= 1) {
384 // Load ST0
385 __ fld_d(Address(rsp, 0));
386 // Store as float and empty fpu stack
387 __ fstp_s(Address(rsp, 0));
388 // and reload
389 __ movflt(xmm0, Address(rsp, 0));
390 } else if (type == T_DOUBLE && UseSSE >= 2 ) {
391 __ movdbl(xmm0, Address(rsp, 0));
392 } else {
393 // restore ST0
394 __ fld_d(Address(rsp, 0));
395 }
396 // and pop the temp
397 __ addptr(rsp, 2 * wordSize);
398 __ push(t); // restore return address
399 }
400 break;
401 #else
402 case T_FLOAT : /* nothing to do */ break;
403 case T_DOUBLE : /* nothing to do */ break;
404 #endif // _LP64
405
406 case T_VALUETYPE: // fall through (value types are handled with oops)
407 case T_OBJECT :
408 // retrieve result from frame
409 __ movptr(rax, Address(rbp, frame::interpreter_frame_oop_temp_offset*wordSize));
410 // and verify it
411 __ verify_oop(rax);
412 break;
413 default : ShouldNotReachHere();
414 }
415 __ ret(0); // return from result handler
416 return entry;
417 }
418
419 address TemplateInterpreterGenerator::generate_safept_entry_for(
420 TosState state,
421 address runtime_entry) {
422 address entry = __ pc();
423 __ push(state);
424 __ call_VM(noreg, runtime_entry);
425 __ dispatch_via(vtos, Interpreter::_normal_table.table_for(vtos));
426 return entry;
427 }
428
429
430
431 // Helpers for commoning out cases in the various type of method entries.
432 //
433
434
435 // increment invocation count & check for overflow
436 //
437 // Note: checking for negative value instead of overflow
438 // so we have a 'sticky' overflow test
439 //
440 // rbx: method
441 // rcx: invocation counter
442 //
443 void TemplateInterpreterGenerator::generate_counter_incr(
444 Label* overflow,
445 Label* profile_method,
446 Label* profile_method_continue) {
447 Label done;
448 // Note: In tiered we increment either counters in Method* or in MDO depending if we're profiling or not.
449 if (TieredCompilation) {
450 int increment = InvocationCounter::count_increment;
451 Label no_mdo;
452 if (ProfileInterpreter) {
453 // Are we profiling?
454 __ movptr(rax, Address(rbx, Method::method_data_offset()));
455 __ testptr(rax, rax);
456 __ jccb(Assembler::zero, no_mdo);
457 // Increment counter in the MDO
458 const Address mdo_invocation_counter(rax, in_bytes(MethodData::invocation_counter_offset()) +
459 in_bytes(InvocationCounter::counter_offset()));
460 const Address mask(rax, in_bytes(MethodData::invoke_mask_offset()));
461 __ increment_mask_and_jump(mdo_invocation_counter, increment, mask, rcx, false, Assembler::zero, overflow);
462 __ jmp(done);
463 }
464 __ bind(no_mdo);
465 // Increment counter in MethodCounters
466 const Address invocation_counter(rax,
467 MethodCounters::invocation_counter_offset() +
468 InvocationCounter::counter_offset());
469 __ get_method_counters(rbx, rax, done);
470 const Address mask(rax, in_bytes(MethodCounters::invoke_mask_offset()));
471 __ increment_mask_and_jump(invocation_counter, increment, mask, rcx,
472 false, Assembler::zero, overflow);
473 __ bind(done);
474 } else { // not TieredCompilation
475 const Address backedge_counter(rax,
476 MethodCounters::backedge_counter_offset() +
477 InvocationCounter::counter_offset());
478 const Address invocation_counter(rax,
479 MethodCounters::invocation_counter_offset() +
480 InvocationCounter::counter_offset());
481
482 __ get_method_counters(rbx, rax, done);
483
484 if (ProfileInterpreter) {
485 __ incrementl(Address(rax,
486 MethodCounters::interpreter_invocation_counter_offset()));
487 }
488 // Update standard invocation counters
489 __ movl(rcx, invocation_counter);
490 __ incrementl(rcx, InvocationCounter::count_increment);
491 __ movl(invocation_counter, rcx); // save invocation count
492
493 __ movl(rax, backedge_counter); // load backedge counter
494 __ andl(rax, InvocationCounter::count_mask_value); // mask out the status bits
495
496 __ addl(rcx, rax); // add both counters
497
498 // profile_method is non-null only for interpreted method so
499 // profile_method != NULL == !native_call
500
501 if (ProfileInterpreter && profile_method != NULL) {
502 // Test to see if we should create a method data oop
503 __ movptr(rax, Address(rbx, Method::method_counters_offset()));
504 __ cmp32(rcx, Address(rax, in_bytes(MethodCounters::interpreter_profile_limit_offset())));
505 __ jcc(Assembler::less, *profile_method_continue);
506
507 // if no method data exists, go to profile_method
508 __ test_method_data_pointer(rax, *profile_method);
509 }
510
511 __ movptr(rax, Address(rbx, Method::method_counters_offset()));
512 __ cmp32(rcx, Address(rax, in_bytes(MethodCounters::interpreter_invocation_limit_offset())));
513 __ jcc(Assembler::aboveEqual, *overflow);
514 __ bind(done);
515 }
516 }
517
518 void TemplateInterpreterGenerator::generate_counter_overflow(Label& do_continue) {
519
520 // Asm interpreter on entry
521 // r14/rdi - locals
522 // r13/rsi - bcp
523 // rbx - method
524 // rdx - cpool --- DOES NOT APPEAR TO BE TRUE
525 // rbp - interpreter frame
526
527 // On return (i.e. jump to entry_point) [ back to invocation of interpreter ]
528 // Everything as it was on entry
529 // rdx is not restored. Doesn't appear to really be set.
530
531 // InterpreterRuntime::frequency_counter_overflow takes two
532 // arguments, the first (thread) is passed by call_VM, the second
533 // indicates if the counter overflow occurs at a backwards branch
534 // (NULL bcp). We pass zero for it. The call returns the address
535 // of the verified entry point for the method or NULL if the
536 // compilation did not complete (either went background or bailed
537 // out).
538 Register rarg = NOT_LP64(rax) LP64_ONLY(c_rarg1);
539 __ movl(rarg, 0);
540 __ call_VM(noreg,
541 CAST_FROM_FN_PTR(address,
542 InterpreterRuntime::frequency_counter_overflow),
543 rarg);
544
545 __ movptr(rbx, Address(rbp, method_offset)); // restore Method*
546 // Preserve invariant that r13/r14 contain bcp/locals of sender frame
547 // and jump to the interpreted entry.
548 __ jmp(do_continue, relocInfo::none);
549 }
550
551 // See if we've got enough room on the stack for locals plus overhead below
552 // JavaThread::stack_overflow_limit(). If not, throw a StackOverflowError
553 // without going through the signal handler, i.e., reserved and yellow zones
554 // will not be made usable. The shadow zone must suffice to handle the
555 // overflow.
556 // The expression stack grows down incrementally, so the normal guard
557 // page mechanism will work for that.
558 //
559 // NOTE: Since the additional locals are also always pushed (wasn't
560 // obvious in generate_fixed_frame) so the guard should work for them
561 // too.
562 //
563 // Args:
564 // rdx: number of additional locals this frame needs (what we must check)
565 // rbx: Method*
566 //
567 // Kills:
568 // rax
569 void TemplateInterpreterGenerator::generate_stack_overflow_check(void) {
570
571 // monitor entry size: see picture of stack in frame_x86.hpp
572 const int entry_size = frame::interpreter_frame_monitor_size() * wordSize;
573
574 // total overhead size: entry_size + (saved rbp through expr stack
575 // bottom). be sure to change this if you add/subtract anything
576 // to/from the overhead area
577 const int overhead_size =
578 -(frame::interpreter_frame_initial_sp_offset * wordSize) + entry_size;
579
580 const int page_size = os::vm_page_size();
581
582 Label after_frame_check;
583
584 // see if the frame is greater than one page in size. If so,
585 // then we need to verify there is enough stack space remaining
586 // for the additional locals.
587 __ cmpl(rdx, (page_size - overhead_size) / Interpreter::stackElementSize);
588 __ jcc(Assembler::belowEqual, after_frame_check);
589
590 // compute rsp as if this were going to be the last frame on
591 // the stack before the red zone
592
593 Label after_frame_check_pop;
594 const Register thread = NOT_LP64(rsi) LP64_ONLY(r15_thread);
595 #ifndef _LP64
596 __ push(thread);
597 __ get_thread(thread);
598 #endif
599
600 const Address stack_limit(thread, JavaThread::stack_overflow_limit_offset());
601
602 // locals + overhead, in bytes
603 __ mov(rax, rdx);
604 __ shlptr(rax, Interpreter::logStackElementSize); // Convert parameter count to bytes.
605 __ addptr(rax, overhead_size);
606
607 #ifdef ASSERT
608 Label limit_okay;
609 // Verify that thread stack overflow limit is non-zero.
610 __ cmpptr(stack_limit, (int32_t)NULL_WORD);
611 __ jcc(Assembler::notEqual, limit_okay);
612 __ stop("stack overflow limit is zero");
613 __ bind(limit_okay);
614 #endif
615
616 // Add locals/frame size to stack limit.
617 __ addptr(rax, stack_limit);
618
619 // Check against the current stack bottom.
620 __ cmpptr(rsp, rax);
621
622 __ jcc(Assembler::above, after_frame_check_pop);
623 NOT_LP64(__ pop(rsi)); // get saved bcp
624
625 // Restore sender's sp as SP. This is necessary if the sender's
626 // frame is an extended compiled frame (see gen_c2i_adapter())
627 // and safer anyway in case of JSR292 adaptations.
628
629 __ pop(rax); // return address must be moved if SP is changed
630 __ mov(rsp, rbcp);
631 __ push(rax);
632
633 // Note: the restored frame is not necessarily interpreted.
634 // Use the shared runtime version of the StackOverflowError.
635 assert(StubRoutines::throw_StackOverflowError_entry() != NULL, "stub not yet generated");
636 __ jump(ExternalAddress(StubRoutines::throw_StackOverflowError_entry()));
637 // all done with frame size check
638 __ bind(after_frame_check_pop);
639 NOT_LP64(__ pop(rsi));
640
641 // all done with frame size check
642 __ bind(after_frame_check);
643 }
644
645 // Allocate monitor and lock method (asm interpreter)
646 //
647 // Args:
648 // rbx: Method*
649 // r14/rdi: locals
650 //
651 // Kills:
652 // rax
653 // c_rarg0, c_rarg1, c_rarg2, c_rarg3, ...(param regs)
654 // rscratch1, rscratch2 (scratch regs)
655 void TemplateInterpreterGenerator::lock_method() {
656 // synchronize method
657 const Address access_flags(rbx, Method::access_flags_offset());
658 const Address monitor_block_top(
659 rbp,
660 frame::interpreter_frame_monitor_block_top_offset * wordSize);
661 const int entry_size = frame::interpreter_frame_monitor_size() * wordSize;
662
663 #ifdef ASSERT
664 {
665 Label L;
666 __ movl(rax, access_flags);
667 __ testl(rax, JVM_ACC_SYNCHRONIZED);
668 __ jcc(Assembler::notZero, L);
669 __ stop("method doesn't need synchronization");
670 __ bind(L);
671 }
672 #endif // ASSERT
673
674 // get synchronization object
675 {
676 Label done;
677 __ movl(rax, access_flags);
678 __ testl(rax, JVM_ACC_STATIC);
679 // get receiver (assume this is frequent case)
680 __ movptr(rax, Address(rlocals, Interpreter::local_offset_in_bytes(0)));
681 __ jcc(Assembler::zero, done);
682 __ load_mirror(rax, rbx);
683
684 #ifdef ASSERT
685 {
686 Label L;
687 __ testptr(rax, rax);
688 __ jcc(Assembler::notZero, L);
689 __ stop("synchronization object is NULL");
690 __ bind(L);
691 }
692 #endif // ASSERT
693
694 __ bind(done);
695 __ resolve(IS_NOT_NULL, rax);
696 }
697
698 // add space for monitor & lock
699 __ subptr(rsp, entry_size); // add space for a monitor entry
700 __ movptr(monitor_block_top, rsp); // set new monitor block top
701 // store object
702 __ movptr(Address(rsp, BasicObjectLock::obj_offset_in_bytes()), rax);
703 const Register lockreg = NOT_LP64(rdx) LP64_ONLY(c_rarg1);
704 __ movptr(lockreg, rsp); // object address
705 __ lock_object(lockreg);
706 }
707
708 // Generate a fixed interpreter frame. This is identical setup for
709 // interpreted methods and for native methods hence the shared code.
710 //
711 // Args:
712 // rax: return address
713 // rbx: Method*
714 // r14/rdi: pointer to locals
715 // r13/rsi: sender sp
716 // rdx: cp cache
717 void TemplateInterpreterGenerator::generate_fixed_frame(bool native_call) {
718 // initialize fixed part of activation frame
719 __ push(rax); // save return address
720 __ enter(); // save old & set new rbp
721 __ push(rbcp); // set sender sp
722 __ push((int)NULL_WORD); // leave last_sp as null
723 __ movptr(rbcp, Address(rbx, Method::const_offset())); // get ConstMethod*
724 __ lea(rbcp, Address(rbcp, ConstMethod::codes_offset())); // get codebase
725 __ push(rbx); // save Method*
726 // Get mirror and store it in the frame as GC root for this Method*
727 __ load_mirror(rdx, rbx);
728 __ push(rdx);
729 if (ProfileInterpreter) {
730 Label method_data_continue;
731 __ movptr(rdx, Address(rbx, in_bytes(Method::method_data_offset())));
732 __ testptr(rdx, rdx);
733 __ jcc(Assembler::zero, method_data_continue);
734 __ addptr(rdx, in_bytes(MethodData::data_offset()));
735 __ bind(method_data_continue);
736 __ push(rdx); // set the mdp (method data pointer)
737 } else {
738 __ push(0);
739 }
740
741 __ movptr(rdx, Address(rbx, Method::const_offset()));
742 __ movptr(rdx, Address(rdx, ConstMethod::constants_offset()));
743 __ movptr(rdx, Address(rdx, ConstantPool::cache_offset_in_bytes()));
744 __ push(rdx); // set constant pool cache
745 __ push(rlocals); // set locals pointer
746 if (native_call) {
747 __ push(0); // no bcp
748 } else {
749 __ push(rbcp); // set bcp
750 }
751 __ push(0); // reserve word for pointer to expression stack bottom
752 __ movptr(Address(rsp, 0), rsp); // set expression stack bottom
753 }
754
755 // End of helpers
756
757 // Method entry for java.lang.ref.Reference.get.
758 address TemplateInterpreterGenerator::generate_Reference_get_entry(void) {
759 // Code: _aload_0, _getfield, _areturn
760 // parameter size = 1
761 //
762 // The code that gets generated by this routine is split into 2 parts:
763 // 1. The "intrinsified" code performing an ON_WEAK_OOP_REF load,
764 // 2. The slow path - which is an expansion of the regular method entry.
765 //
766 // Notes:-
767 // * An intrinsic is always executed, where an ON_WEAK_OOP_REF load is performed.
768 // * We may jump to the slow path iff the receiver is null. If the
769 // Reference object is null then we no longer perform an ON_WEAK_OOP_REF load
770 // Thus we can use the regular method entry code to generate the NPE.
771 //
772 // rbx: Method*
773
774 // r13: senderSP must preserve for slow path, set SP to it on fast path
775
776 address entry = __ pc();
777
778 const int referent_offset = java_lang_ref_Reference::referent_offset;
779 guarantee(referent_offset > 0, "referent offset not initialized");
780
781 Label slow_path;
782 // rbx: method
783
784 // Check if local 0 != NULL
785 // If the receiver is null then it is OK to jump to the slow path.
786 __ movptr(rax, Address(rsp, wordSize));
787
788 __ testptr(rax, rax);
789 __ jcc(Assembler::zero, slow_path);
790
791 // rax: local 0
792 // rbx: method (but can be used as scratch now)
793 // rdx: scratch
794 // rdi: scratch
795
796 // Preserve the sender sp in case the load barrier
797 // calls the runtime
798 NOT_LP64(__ push(rsi));
799
800 // Load the value of the referent field.
801 const Address field_address(rax, referent_offset);
802 __ load_heap_oop(rax, field_address, /*tmp1*/ rbx, /*tmp_thread*/ rdx, ON_WEAK_OOP_REF);
803
804 // _areturn
805 const Register sender_sp = NOT_LP64(rsi) LP64_ONLY(r13);
806 NOT_LP64(__ pop(rsi)); // get sender sp
807 __ pop(rdi); // get return address
808 __ mov(rsp, sender_sp); // set sp to sender sp
809 __ jmp(rdi);
810 __ ret(0);
811
812 // generate a vanilla interpreter entry as the slow path
813 __ bind(slow_path);
814 __ jump_to_entry(Interpreter::entry_for_kind(Interpreter::zerolocals));
815 return entry;
816 }
817
818 void TemplateInterpreterGenerator::bang_stack_shadow_pages(bool native_call) {
819 // Quick & dirty stack overflow checking: bang the stack & handle trap.
820 // Note that we do the banging after the frame is setup, since the exception
821 // handling code expects to find a valid interpreter frame on the stack.
822 // Doing the banging earlier fails if the caller frame is not an interpreter
823 // frame.
824 // (Also, the exception throwing code expects to unlock any synchronized
825 // method receiever, so do the banging after locking the receiver.)
826
827 // Bang each page in the shadow zone. We can't assume it's been done for
828 // an interpreter frame with greater than a page of locals, so each page
829 // needs to be checked. Only true for non-native.
830 if (UseStackBanging) {
831 const int page_size = os::vm_page_size();
832 const int n_shadow_pages = ((int)JavaThread::stack_shadow_zone_size()) / page_size;
833 const int start_page = native_call ? n_shadow_pages : 1;
834 for (int pages = start_page; pages <= n_shadow_pages; pages++) {
835 __ bang_stack_with_offset(pages*page_size);
836 }
837 }
838 }
839
840 // Interpreter stub for calling a native method. (asm interpreter)
841 // This sets up a somewhat different looking stack for calling the
842 // native method than the typical interpreter frame setup.
843 address TemplateInterpreterGenerator::generate_native_entry(bool synchronized) {
844 // determine code generation flags
845 bool inc_counter = UseCompiler || CountCompiledCalls || LogTouchedMethods;
846
847 // rbx: Method*
848 // rbcp: sender sp
849
850 address entry_point = __ pc();
851
852 const Address constMethod (rbx, Method::const_offset());
853 const Address access_flags (rbx, Method::access_flags_offset());
854 const Address size_of_parameters(rcx, ConstMethod::
855 size_of_parameters_offset());
856
857
858 // get parameter size (always needed)
859 __ movptr(rcx, constMethod);
860 __ load_unsigned_short(rcx, size_of_parameters);
861
862 // native calls don't need the stack size check since they have no
863 // expression stack and the arguments are already on the stack and
864 // we only add a handful of words to the stack
865
866 // rbx: Method*
867 // rcx: size of parameters
868 // rbcp: sender sp
869 __ pop(rax); // get return address
870
871 // for natives the size of locals is zero
872
873 // compute beginning of parameters
874 __ lea(rlocals, Address(rsp, rcx, Interpreter::stackElementScale(), -wordSize));
875
876 // add 2 zero-initialized slots for native calls
877 // initialize result_handler slot
878 __ push((int) NULL_WORD);
879 // slot for oop temp
880 // (static native method holder mirror/jni oop result)
881 __ push((int) NULL_WORD);
882
883 // initialize fixed part of activation frame
884 generate_fixed_frame(true);
885
886 // make sure method is native & not abstract
887 #ifdef ASSERT
888 __ movl(rax, access_flags);
889 {
890 Label L;
891 __ testl(rax, JVM_ACC_NATIVE);
892 __ jcc(Assembler::notZero, L);
893 __ stop("tried to execute non-native method as native");
894 __ bind(L);
895 }
896 {
897 Label L;
898 __ testl(rax, JVM_ACC_ABSTRACT);
899 __ jcc(Assembler::zero, L);
900 __ stop("tried to execute abstract method in interpreter");
901 __ bind(L);
902 }
903 #endif
904
905 // Since at this point in the method invocation the exception handler
906 // would try to exit the monitor of synchronized methods which hasn't
907 // been entered yet, we set the thread local variable
908 // _do_not_unlock_if_synchronized to true. The remove_activation will
909 // check this flag.
910
911 const Register thread1 = NOT_LP64(rax) LP64_ONLY(r15_thread);
912 NOT_LP64(__ get_thread(thread1));
913 const Address do_not_unlock_if_synchronized(thread1,
914 in_bytes(JavaThread::do_not_unlock_if_synchronized_offset()));
915 __ movbool(do_not_unlock_if_synchronized, true);
916
917 // increment invocation count & check for overflow
918 Label invocation_counter_overflow;
919 if (inc_counter) {
920 generate_counter_incr(&invocation_counter_overflow, NULL, NULL);
921 }
922
923 Label continue_after_compile;
924 __ bind(continue_after_compile);
925
926 bang_stack_shadow_pages(true);
927
928 // reset the _do_not_unlock_if_synchronized flag
929 NOT_LP64(__ get_thread(thread1));
930 __ movbool(do_not_unlock_if_synchronized, false);
931
932 // check for synchronized methods
933 // Must happen AFTER invocation_counter check and stack overflow check,
934 // so method is not locked if overflows.
935 if (synchronized) {
936 lock_method();
937 } else {
938 // no synchronization necessary
939 #ifdef ASSERT
940 {
941 Label L;
942 __ movl(rax, access_flags);
943 __ testl(rax, JVM_ACC_SYNCHRONIZED);
944 __ jcc(Assembler::zero, L);
945 __ stop("method needs synchronization");
946 __ bind(L);
947 }
948 #endif
949 }
950
951 // start execution
952 #ifdef ASSERT
953 {
954 Label L;
955 const Address monitor_block_top(rbp,
956 frame::interpreter_frame_monitor_block_top_offset * wordSize);
957 __ movptr(rax, monitor_block_top);
958 __ cmpptr(rax, rsp);
959 __ jcc(Assembler::equal, L);
960 __ stop("broken stack frame setup in interpreter");
961 __ bind(L);
962 }
963 #endif
964
965 // jvmti support
966 __ notify_method_entry();
967
968 // work registers
969 const Register method = rbx;
970 const Register thread = NOT_LP64(rdi) LP64_ONLY(r15_thread);
971 const Register t = NOT_LP64(rcx) LP64_ONLY(r11);
972
973 // allocate space for parameters
974 __ get_method(method);
975 __ movptr(t, Address(method, Method::const_offset()));
976 __ load_unsigned_short(t, Address(t, ConstMethod::size_of_parameters_offset()));
977
978 #ifndef _LP64
979 __ shlptr(t, Interpreter::logStackElementSize); // Convert parameter count to bytes.
980 __ addptr(t, 2*wordSize); // allocate two more slots for JNIEnv and possible mirror
981 __ subptr(rsp, t);
982 __ andptr(rsp, -(StackAlignmentInBytes)); // gcc needs 16 byte aligned stacks to do XMM intrinsics
983 #else
984 __ shll(t, Interpreter::logStackElementSize);
985
986 __ subptr(rsp, t);
987 __ subptr(rsp, frame::arg_reg_save_area_bytes); // windows
988 __ andptr(rsp, -16); // must be 16 byte boundary (see amd64 ABI)
989 #endif // _LP64
990
991 // get signature handler
992 {
993 Label L;
994 __ movptr(t, Address(method, Method::signature_handler_offset()));
995 __ testptr(t, t);
996 __ jcc(Assembler::notZero, L);
997 __ call_VM(noreg,
998 CAST_FROM_FN_PTR(address,
999 InterpreterRuntime::prepare_native_call),
1000 method);
1001 __ get_method(method);
1002 __ movptr(t, Address(method, Method::signature_handler_offset()));
1003 __ bind(L);
1004 }
1005
1006 // call signature handler
1007 assert(InterpreterRuntime::SignatureHandlerGenerator::from() == rlocals,
1008 "adjust this code");
1009 assert(InterpreterRuntime::SignatureHandlerGenerator::to() == rsp,
1010 "adjust this code");
1011 assert(InterpreterRuntime::SignatureHandlerGenerator::temp() == NOT_LP64(t) LP64_ONLY(rscratch1),
1012 "adjust this code");
1013
1014 // The generated handlers do not touch RBX (the method oop).
1015 // However, large signatures cannot be cached and are generated
1016 // each time here. The slow-path generator can do a GC on return,
1017 // so we must reload it after the call.
1018 __ call(t);
1019 __ get_method(method); // slow path can do a GC, reload RBX
1020
1021
1022 // result handler is in rax
1023 // set result handler
1024 __ movptr(Address(rbp,
1025 (frame::interpreter_frame_result_handler_offset) * wordSize),
1026 rax);
1027
1028 // pass mirror handle if static call
1029 {
1030 Label L;
1031 __ movl(t, Address(method, Method::access_flags_offset()));
1032 __ testl(t, JVM_ACC_STATIC);
1033 __ jcc(Assembler::zero, L);
1034 // get mirror
1035 __ load_mirror(t, method, rax);
1036 // copy mirror into activation frame
1037 __ movptr(Address(rbp, frame::interpreter_frame_oop_temp_offset * wordSize),
1038 t);
1039 // pass handle to mirror
1040 #ifndef _LP64
1041 __ lea(t, Address(rbp, frame::interpreter_frame_oop_temp_offset * wordSize));
1042 __ movptr(Address(rsp, wordSize), t);
1043 #else
1044 __ lea(c_rarg1,
1045 Address(rbp, frame::interpreter_frame_oop_temp_offset * wordSize));
1046 #endif // _LP64
1047 __ bind(L);
1048 }
1049
1050 // get native function entry point
1051 {
1052 Label L;
1053 __ movptr(rax, Address(method, Method::native_function_offset()));
1054 ExternalAddress unsatisfied(SharedRuntime::native_method_throw_unsatisfied_link_error_entry());
1055 __ cmpptr(rax, unsatisfied.addr());
1056 __ jcc(Assembler::notEqual, L);
1057 __ call_VM(noreg,
1058 CAST_FROM_FN_PTR(address,
1059 InterpreterRuntime::prepare_native_call),
1060 method);
1061 __ get_method(method);
1062 __ movptr(rax, Address(method, Method::native_function_offset()));
1063 __ bind(L);
1064 }
1065
1066 // pass JNIEnv
1067 #ifndef _LP64
1068 __ get_thread(thread);
1069 __ lea(t, Address(thread, JavaThread::jni_environment_offset()));
1070 __ movptr(Address(rsp, 0), t);
1071
1072 // set_last_Java_frame_before_call
1073 // It is enough that the pc()
1074 // points into the right code segment. It does not have to be the correct return pc.
1075 __ set_last_Java_frame(thread, noreg, rbp, __ pc());
1076 #else
1077 __ lea(c_rarg0, Address(r15_thread, JavaThread::jni_environment_offset()));
1078
1079 // It is enough that the pc() points into the right code
1080 // segment. It does not have to be the correct return pc.
1081 __ set_last_Java_frame(rsp, rbp, (address) __ pc());
1082 #endif // _LP64
1083
1084 // change thread state
1085 #ifdef ASSERT
1086 {
1087 Label L;
1088 __ movl(t, Address(thread, JavaThread::thread_state_offset()));
1089 __ cmpl(t, _thread_in_Java);
1090 __ jcc(Assembler::equal, L);
1091 __ stop("Wrong thread state in native stub");
1092 __ bind(L);
1093 }
1094 #endif
1095
1096 // Change state to native
1097
1098 __ movl(Address(thread, JavaThread::thread_state_offset()),
1099 _thread_in_native);
1100
1101 // Call the native method.
1102 __ call(rax);
1103 // 32: result potentially in rdx:rax or ST0
1104 // 64: result potentially in rax or xmm0
1105
1106 // Verify or restore cpu control state after JNI call
1107 __ restore_cpu_control_state_after_jni();
1108
1109 // NOTE: The order of these pushes is known to frame::interpreter_frame_result
1110 // in order to extract the result of a method call. If the order of these
1111 // pushes change or anything else is added to the stack then the code in
1112 // interpreter_frame_result must also change.
1113
1114 #ifndef _LP64
1115 // save potential result in ST(0) & rdx:rax
1116 // (if result handler is the T_FLOAT or T_DOUBLE handler, result must be in ST0 -
1117 // the check is necessary to avoid potential Intel FPU overflow problems by saving/restoring 'empty' FPU registers)
1118 // It is safe to do this push because state is _thread_in_native and return address will be found
1119 // via _last_native_pc and not via _last_jave_sp
1120
1121 // NOTE: the order of theses push(es) is known to frame::interpreter_frame_result.
1122 // If the order changes or anything else is added to the stack the code in
1123 // interpreter_frame_result will have to be changed.
1124
1125 { Label L;
1126 Label push_double;
1127 ExternalAddress float_handler(AbstractInterpreter::result_handler(T_FLOAT));
1128 ExternalAddress double_handler(AbstractInterpreter::result_handler(T_DOUBLE));
1129 __ cmpptr(Address(rbp, (frame::interpreter_frame_oop_temp_offset + 1)*wordSize),
1130 float_handler.addr());
1131 __ jcc(Assembler::equal, push_double);
1132 __ cmpptr(Address(rbp, (frame::interpreter_frame_oop_temp_offset + 1)*wordSize),
1133 double_handler.addr());
1134 __ jcc(Assembler::notEqual, L);
1135 __ bind(push_double);
1136 __ push_d(); // FP values are returned using the FPU, so push FPU contents (even if UseSSE > 0).
1137 __ bind(L);
1138 }
1139 #else
1140 __ push(dtos);
1141 #endif // _LP64
1142
1143 __ push(ltos);
1144
1145 // change thread state
1146 NOT_LP64(__ get_thread(thread));
1147 __ movl(Address(thread, JavaThread::thread_state_offset()),
1148 _thread_in_native_trans);
1149
1150 // Force this write out before the read below
1151 __ membar(Assembler::Membar_mask_bits(
1152 Assembler::LoadLoad | Assembler::LoadStore |
1153 Assembler::StoreLoad | Assembler::StoreStore));
1154
1155 #ifndef _LP64
1156 if (AlwaysRestoreFPU) {
1157 // Make sure the control word is correct.
1158 __ fldcw(ExternalAddress(StubRoutines::addr_fpu_cntrl_wrd_std()));
1159 }
1160 #endif // _LP64
1161
1162 // check for safepoint operation in progress and/or pending suspend requests
1163 {
1164 Label Continue;
1165 Label slow_path;
1166
1167 #ifndef _LP64
1168 __ safepoint_poll(slow_path, thread, noreg);
1169 #else
1170 __ safepoint_poll(slow_path, r15_thread, rscratch1);
1171 #endif
1172
1173 __ cmpl(Address(thread, JavaThread::suspend_flags_offset()), 0);
1174 __ jcc(Assembler::equal, Continue);
1175 __ bind(slow_path);
1176
1177 // Don't use call_VM as it will see a possible pending exception
1178 // and forward it and never return here preventing us from
1179 // clearing _last_native_pc down below. Also can't use
1180 // call_VM_leaf either as it will check to see if r13 & r14 are
1181 // preserved and correspond to the bcp/locals pointers. So we do a
1182 // runtime call by hand.
1183 //
1184 #ifndef _LP64
1185 __ push(thread);
1186 __ call(RuntimeAddress(CAST_FROM_FN_PTR(address,
1187 JavaThread::check_special_condition_for_native_trans)));
1188 __ increment(rsp, wordSize);
1189 __ get_thread(thread);
1190 #else
1191 __ mov(c_rarg0, r15_thread);
1192 __ mov(r12, rsp); // remember sp (can only use r12 if not using call_VM)
1193 __ subptr(rsp, frame::arg_reg_save_area_bytes); // windows
1194 __ andptr(rsp, -16); // align stack as required by ABI
1195 __ call(RuntimeAddress(CAST_FROM_FN_PTR(address, JavaThread::check_special_condition_for_native_trans)));
1196 __ mov(rsp, r12); // restore sp
1197 __ reinit_heapbase();
1198 #endif // _LP64
1199 __ bind(Continue);
1200 }
1201
1202 // change thread state
1203 __ movl(Address(thread, JavaThread::thread_state_offset()), _thread_in_Java);
1204
1205 // reset_last_Java_frame
1206 __ reset_last_Java_frame(thread, true);
1207
1208 if (CheckJNICalls) {
1209 // clear_pending_jni_exception_check
1210 __ movptr(Address(thread, JavaThread::pending_jni_exception_check_fn_offset()), NULL_WORD);
1211 }
1212
1213 // reset handle block
1214 __ movptr(t, Address(thread, JavaThread::active_handles_offset()));
1215 __ movl(Address(t, JNIHandleBlock::top_offset_in_bytes()), (int32_t)NULL_WORD);
1216
1217 // If result is an oop unbox and store it in frame where gc will see it
1218 // and result handler will pick it up
1219
1220 {
1221 Label no_oop;
1222 __ lea(t, ExternalAddress(AbstractInterpreter::result_handler(T_OBJECT)));
1223 __ cmpptr(t, Address(rbp, frame::interpreter_frame_result_handler_offset*wordSize));
1224 __ jcc(Assembler::notEqual, no_oop);
1225 // retrieve result
1226 __ pop(ltos);
1227 // Unbox oop result, e.g. JNIHandles::resolve value.
1228 __ resolve_jobject(rax /* value */,
1229 thread /* thread */,
1230 t /* tmp */);
1231 __ movptr(Address(rbp, frame::interpreter_frame_oop_temp_offset*wordSize), rax);
1232 // keep stack depth as expected by pushing oop which will eventually be discarded
1233 __ push(ltos);
1234 __ bind(no_oop);
1235 }
1236
1237
1238 {
1239 Label no_reguard;
1240 __ cmpl(Address(thread, JavaThread::stack_guard_state_offset()),
1241 JavaThread::stack_guard_yellow_reserved_disabled);
1242 __ jcc(Assembler::notEqual, no_reguard);
1243
1244 __ pusha(); // XXX only save smashed registers
1245 #ifndef _LP64
1246 __ call(RuntimeAddress(CAST_FROM_FN_PTR(address, SharedRuntime::reguard_yellow_pages)));
1247 __ popa();
1248 #else
1249 __ mov(r12, rsp); // remember sp (can only use r12 if not using call_VM)
1250 __ subptr(rsp, frame::arg_reg_save_area_bytes); // windows
1251 __ andptr(rsp, -16); // align stack as required by ABI
1252 __ call(RuntimeAddress(CAST_FROM_FN_PTR(address, SharedRuntime::reguard_yellow_pages)));
1253 __ mov(rsp, r12); // restore sp
1254 __ popa(); // XXX only restore smashed registers
1255 __ reinit_heapbase();
1256 #endif // _LP64
1257
1258 __ bind(no_reguard);
1259 }
1260
1261
1262 // The method register is junk from after the thread_in_native transition
1263 // until here. Also can't call_VM until the bcp has been
1264 // restored. Need bcp for throwing exception below so get it now.
1265 __ get_method(method);
1266
1267 // restore to have legal interpreter frame, i.e., bci == 0 <=> code_base()
1268 __ movptr(rbcp, Address(method, Method::const_offset())); // get ConstMethod*
1269 __ lea(rbcp, Address(rbcp, ConstMethod::codes_offset())); // get codebase
1270
1271 // handle exceptions (exception handling will handle unlocking!)
1272 {
1273 Label L;
1274 __ cmpptr(Address(thread, Thread::pending_exception_offset()), (int32_t) NULL_WORD);
1275 __ jcc(Assembler::zero, L);
1276 // Note: At some point we may want to unify this with the code
1277 // used in call_VM_base(); i.e., we should use the
1278 // StubRoutines::forward_exception code. For now this doesn't work
1279 // here because the rsp is not correctly set at this point.
1280 __ MacroAssembler::call_VM(noreg,
1281 CAST_FROM_FN_PTR(address,
1282 InterpreterRuntime::throw_pending_exception));
1283 __ should_not_reach_here();
1284 __ bind(L);
1285 }
1286
1287 // do unlocking if necessary
1288 {
1289 Label L;
1290 __ movl(t, Address(method, Method::access_flags_offset()));
1291 __ testl(t, JVM_ACC_SYNCHRONIZED);
1292 __ jcc(Assembler::zero, L);
1293 // the code below should be shared with interpreter macro
1294 // assembler implementation
1295 {
1296 Label unlock;
1297 // BasicObjectLock will be first in list, since this is a
1298 // synchronized method. However, need to check that the object
1299 // has not been unlocked by an explicit monitorexit bytecode.
1300 const Address monitor(rbp,
1301 (intptr_t)(frame::interpreter_frame_initial_sp_offset *
1302 wordSize - (int)sizeof(BasicObjectLock)));
1303
1304 const Register regmon = NOT_LP64(rdx) LP64_ONLY(c_rarg1);
1305
1306 // monitor expect in c_rarg1 for slow unlock path
1307 __ lea(regmon, monitor); // address of first monitor
1308
1309 __ movptr(t, Address(regmon, BasicObjectLock::obj_offset_in_bytes()));
1310 __ testptr(t, t);
1311 __ jcc(Assembler::notZero, unlock);
1312
1313 // Entry already unlocked, need to throw exception
1314 __ MacroAssembler::call_VM(noreg,
1315 CAST_FROM_FN_PTR(address,
1316 InterpreterRuntime::throw_illegal_monitor_state_exception));
1317 __ should_not_reach_here();
1318
1319 __ bind(unlock);
1320 __ unlock_object(regmon);
1321 }
1322 __ bind(L);
1323 }
1324
1325 // jvmti support
1326 // Note: This must happen _after_ handling/throwing any exceptions since
1327 // the exception handler code notifies the runtime of method exits
1328 // too. If this happens before, method entry/exit notifications are
1329 // not properly paired (was bug - gri 11/22/99).
1330 __ notify_method_exit(vtos, InterpreterMacroAssembler::NotifyJVMTI);
1331
1332 // restore potential result in edx:eax, call result handler to
1333 // restore potential result in ST0 & handle result
1334
1335 __ pop(ltos);
1336 LP64_ONLY( __ pop(dtos));
1337
1338 __ movptr(t, Address(rbp,
1339 (frame::interpreter_frame_result_handler_offset) * wordSize));
1340 __ call(t);
1341
1342 // remove activation
1343 __ movptr(t, Address(rbp,
1344 frame::interpreter_frame_sender_sp_offset *
1345 wordSize)); // get sender sp
1346 __ leave(); // remove frame anchor
1347 __ pop(rdi); // get return address
1348 __ mov(rsp, t); // set sp to sender sp
1349 __ jmp(rdi);
1350
1351 if (inc_counter) {
1352 // Handle overflow of counter and compile method
1353 __ bind(invocation_counter_overflow);
1354 generate_counter_overflow(continue_after_compile);
1355 }
1356
1357 return entry_point;
1358 }
1359
1360 // Abstract method entry
1361 // Attempt to execute abstract method. Throw exception
1362 address TemplateInterpreterGenerator::generate_abstract_entry(void) {
1363
1364 address entry_point = __ pc();
1365
1366 // abstract method entry
1367
1368 // pop return address, reset last_sp to NULL
1369 __ empty_expression_stack();
1370 __ restore_bcp(); // rsi must be correct for exception handler (was destroyed)
1371 __ restore_locals(); // make sure locals pointer is correct as well (was destroyed)
1372
1373 // throw exception
1374 __ call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::throw_AbstractMethodErrorWithMethod), rbx);
1375 // the call_VM checks for exception, so we should never return here.
1376 __ should_not_reach_here();
1377
1378 return entry_point;
1379 }
1380
1381 //
1382 // Generic interpreted method entry to (asm) interpreter
1383 //
1384 address TemplateInterpreterGenerator::generate_normal_entry(bool synchronized) {
1385 // determine code generation flags
1386 bool inc_counter = UseCompiler || CountCompiledCalls || LogTouchedMethods;
1387
1388 // ebx: Method*
1389 // rbcp: sender sp
1390 address entry_point = __ pc();
1391
1392 const Address constMethod(rbx, Method::const_offset());
1393 const Address access_flags(rbx, Method::access_flags_offset());
1394 const Address size_of_parameters(rdx,
1395 ConstMethod::size_of_parameters_offset());
1396 const Address size_of_locals(rdx, ConstMethod::size_of_locals_offset());
1397
1398
1399 // get parameter size (always needed)
1400 __ movptr(rdx, constMethod);
1401 __ load_unsigned_short(rcx, size_of_parameters);
1402
1403 // rbx: Method*
1404 // rcx: size of parameters
1405 // rbcp: sender_sp (could differ from sp+wordSize if we were called via c2i )
1406
1407 __ load_unsigned_short(rdx, size_of_locals); // get size of locals in words
1408 __ subl(rdx, rcx); // rdx = no. of additional locals
1409
1410 // YYY
1411 // __ incrementl(rdx);
1412 // __ andl(rdx, -2);
1413
1414 // see if we've got enough room on the stack for locals plus overhead.
1415 generate_stack_overflow_check();
1416
1417 // get return address
1418 __ pop(rax);
1419
1420 // compute beginning of parameters
1421 __ lea(rlocals, Address(rsp, rcx, Interpreter::stackElementScale(), -wordSize));
1422
1423 // rdx - # of additional locals
1424 // allocate space for locals
1425 // explicitly initialize locals
1426 {
1427 Label exit, loop;
1428 __ testl(rdx, rdx);
1429 __ jcc(Assembler::lessEqual, exit); // do nothing if rdx <= 0
1430 __ bind(loop);
1431 __ push((int) NULL_WORD); // initialize local variables
1432 __ decrementl(rdx); // until everything initialized
1433 __ jcc(Assembler::greater, loop);
1434 __ bind(exit);
1435 }
1436
1437 // initialize fixed part of activation frame
1438 generate_fixed_frame(false);
1439
1440 // make sure method is not native & not abstract
1441 #ifdef ASSERT
1442 __ movl(rax, access_flags);
1443 {
1444 Label L;
1445 __ testl(rax, JVM_ACC_NATIVE);
1446 __ jcc(Assembler::zero, L);
1447 __ stop("tried to execute native method as non-native");
1448 __ bind(L);
1449 }
1450 {
1451 Label L;
1452 __ testl(rax, JVM_ACC_ABSTRACT);
1453 __ jcc(Assembler::zero, L);
1454 __ stop("tried to execute abstract method in interpreter");
1455 __ bind(L);
1456 }
1457 #endif
1458
1459 // Since at this point in the method invocation the exception
1460 // handler would try to exit the monitor of synchronized methods
1461 // which hasn't been entered yet, we set the thread local variable
1462 // _do_not_unlock_if_synchronized to true. The remove_activation
1463 // will check this flag.
1464
1465 const Register thread = NOT_LP64(rax) LP64_ONLY(r15_thread);
1466 NOT_LP64(__ get_thread(thread));
1467 const Address do_not_unlock_if_synchronized(thread,
1468 in_bytes(JavaThread::do_not_unlock_if_synchronized_offset()));
1469 __ movbool(do_not_unlock_if_synchronized, true);
1470
1471 __ profile_parameters_type(rax, rcx, rdx);
1472 // increment invocation count & check for overflow
1473 Label invocation_counter_overflow;
1474 Label profile_method;
1475 Label profile_method_continue;
1476 if (inc_counter) {
1477 generate_counter_incr(&invocation_counter_overflow,
1478 &profile_method,
1479 &profile_method_continue);
1480 if (ProfileInterpreter) {
1481 __ bind(profile_method_continue);
1482 }
1483 }
1484
1485 Label continue_after_compile;
1486 __ bind(continue_after_compile);
1487
1488 // check for synchronized interpreted methods
1489 bang_stack_shadow_pages(false);
1490
1491 // reset the _do_not_unlock_if_synchronized flag
1492 NOT_LP64(__ get_thread(thread));
1493 __ movbool(do_not_unlock_if_synchronized, false);
1494
1495 // check for synchronized methods
1496 // Must happen AFTER invocation_counter check and stack overflow check,
1497 // so method is not locked if overflows.
1498 if (synchronized) {
1499 // Allocate monitor and lock method
1500 lock_method();
1501 } else {
1502 // no synchronization necessary
1503 #ifdef ASSERT
1504 {
1505 Label L;
1506 __ movl(rax, access_flags);
1507 __ testl(rax, JVM_ACC_SYNCHRONIZED);
1508 __ jcc(Assembler::zero, L);
1509 __ stop("method needs synchronization");
1510 __ bind(L);
1511 }
1512 #endif
1513 }
1514
1515 // start execution
1516 #ifdef ASSERT
1517 {
1518 Label L;
1519 const Address monitor_block_top (rbp,
1520 frame::interpreter_frame_monitor_block_top_offset * wordSize);
1521 __ movptr(rax, monitor_block_top);
1522 __ cmpptr(rax, rsp);
1523 __ jcc(Assembler::equal, L);
1524 __ stop("broken stack frame setup in interpreter");
1525 __ bind(L);
1526 }
1527 #endif
1528
1529 // jvmti support
1530 __ notify_method_entry();
1531
1532 __ dispatch_next(vtos);
1533
1534 // invocation counter overflow
1535 if (inc_counter) {
1536 if (ProfileInterpreter) {
1537 // We have decided to profile this method in the interpreter
1538 __ bind(profile_method);
1539 __ call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::profile_method));
1540 __ set_method_data_pointer_for_bcp();
1541 __ get_method(rbx);
1542 __ jmp(profile_method_continue);
1543 }
1544 // Handle overflow of counter and compile method
1545 __ bind(invocation_counter_overflow);
1546 generate_counter_overflow(continue_after_compile);
1547 }
1548
1549 return entry_point;
1550 }
1551
1552 //-----------------------------------------------------------------------------
1553 // Exceptions
1554
1555 void TemplateInterpreterGenerator::generate_throw_exception() {
1556 // Entry point in previous activation (i.e., if the caller was
1557 // interpreted)
1558 Interpreter::_rethrow_exception_entry = __ pc();
1559 // Restore sp to interpreter_frame_last_sp even though we are going
1560 // to empty the expression stack for the exception processing.
1561 __ movptr(Address(rbp, frame::interpreter_frame_last_sp_offset * wordSize), (int32_t)NULL_WORD);
1562 // rax: exception
1563 // rdx: return address/pc that threw exception
1564 __ restore_bcp(); // r13/rsi points to call/send
1565 __ restore_locals();
1566 LP64_ONLY(__ reinit_heapbase()); // restore r12 as heapbase.
1567 // Entry point for exceptions thrown within interpreter code
1568 Interpreter::_throw_exception_entry = __ pc();
1569 // expression stack is undefined here
1570 // rax: exception
1571 // r13/rsi: exception bcp
1572 __ verify_oop(rax);
1573 Register rarg = NOT_LP64(rax) LP64_ONLY(c_rarg1);
1574 LP64_ONLY(__ mov(c_rarg1, rax));
1575
1576 // expression stack must be empty before entering the VM in case of
1577 // an exception
1578 __ empty_expression_stack();
1579 // find exception handler address and preserve exception oop
1580 __ call_VM(rdx,
1581 CAST_FROM_FN_PTR(address,
1582 InterpreterRuntime::exception_handler_for_exception),
1583 rarg);
1584 // rax: exception handler entry point
1585 // rdx: preserved exception oop
1586 // r13/rsi: bcp for exception handler
1587 __ push_ptr(rdx); // push exception which is now the only value on the stack
1588 __ jmp(rax); // jump to exception handler (may be _remove_activation_entry!)
1589
1590 // If the exception is not handled in the current frame the frame is
1591 // removed and the exception is rethrown (i.e. exception
1592 // continuation is _rethrow_exception).
1593 //
1594 // Note: At this point the bci is still the bxi for the instruction
1595 // which caused the exception and the expression stack is
1596 // empty. Thus, for any VM calls at this point, GC will find a legal
1597 // oop map (with empty expression stack).
1598
1599 // In current activation
1600 // tos: exception
1601 // esi: exception bcp
1602
1603 //
1604 // JVMTI PopFrame support
1605 //
1606
1607 Interpreter::_remove_activation_preserving_args_entry = __ pc();
1608 __ empty_expression_stack();
1609 // Set the popframe_processing bit in pending_popframe_condition
1610 // indicating that we are currently handling popframe, so that
1611 // call_VMs that may happen later do not trigger new popframe
1612 // handling cycles.
1613 const Register thread = NOT_LP64(rcx) LP64_ONLY(r15_thread);
1614 NOT_LP64(__ 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 Register rarg = NOT_LP64(rdx) LP64_ONLY(c_rarg1);
1632 __ movptr(rarg, Address(rbp, frame::return_addr_offset * wordSize));
1633 __ super_call_VM_leaf(CAST_FROM_FN_PTR(address,
1634 InterpreterRuntime::interpreter_contains), rarg);
1635 __ testl(rax, rax);
1636 __ jcc(Assembler::notZero, caller_not_deoptimized);
1637
1638 // Compute size of arguments for saving when returning to
1639 // deoptimized caller
1640 __ get_method(rax);
1641 __ movptr(rax, Address(rax, Method::const_offset()));
1642 __ load_unsigned_short(rax, Address(rax, in_bytes(ConstMethod::
1643 size_of_parameters_offset())));
1644 __ shll(rax, Interpreter::logStackElementSize);
1645 __ restore_locals();
1646 __ subptr(rlocals, rax);
1647 __ addptr(rlocals, wordSize);
1648 // Save these arguments
1649 NOT_LP64(__ get_thread(thread));
1650 __ super_call_VM_leaf(CAST_FROM_FN_PTR(address,
1651 Deoptimization::
1652 popframe_preserve_args),
1653 thread, rax, rlocals);
1654
1655 __ remove_activation(vtos, rdx,
1656 /* throw_monitor_exception */ false,
1657 /* install_monitor_exception */ false,
1658 /* notify_jvmdi */ false);
1659
1660 // Inform deoptimization that it is responsible for restoring
1661 // these arguments
1662 NOT_LP64(__ get_thread(thread));
1663 __ movl(Address(thread, JavaThread::popframe_condition_offset()),
1664 JavaThread::popframe_force_deopt_reexecution_bit);
1665
1666 // Continue in deoptimization handler
1667 __ jmp(rdx);
1668
1669 __ bind(caller_not_deoptimized);
1670 }
1671
1672 __ remove_activation(vtos, rdx, /* rdx result (retaddr) is not used */
1673 /* throw_monitor_exception */ false,
1674 /* install_monitor_exception */ false,
1675 /* notify_jvmdi */ false);
1676
1677 // Finish with popframe handling
1678 // A previous I2C followed by a deoptimization might have moved the
1679 // outgoing arguments further up the stack. PopFrame expects the
1680 // mutations to those outgoing arguments to be preserved and other
1681 // constraints basically require this frame to look exactly as
1682 // though it had previously invoked an interpreted activation with
1683 // no space between the top of the expression stack (current
1684 // last_sp) and the top of stack. Rather than force deopt to
1685 // maintain this kind of invariant all the time we call a small
1686 // fixup routine to move the mutated arguments onto the top of our
1687 // expression stack if necessary.
1688 #ifndef _LP64
1689 __ mov(rax, rsp);
1690 __ movptr(rbx, Address(rbp, frame::interpreter_frame_last_sp_offset * wordSize));
1691 __ get_thread(thread);
1692 // PC must point into interpreter here
1693 __ set_last_Java_frame(thread, noreg, rbp, __ pc());
1694 __ super_call_VM_leaf(CAST_FROM_FN_PTR(address, InterpreterRuntime::popframe_move_outgoing_args), thread, rax, rbx);
1695 __ get_thread(thread);
1696 #else
1697 __ mov(c_rarg1, rsp);
1698 __ movptr(c_rarg2, Address(rbp, frame::interpreter_frame_last_sp_offset * wordSize));
1699 // PC must point into interpreter here
1700 __ set_last_Java_frame(noreg, rbp, __ pc());
1701 __ super_call_VM_leaf(CAST_FROM_FN_PTR(address, InterpreterRuntime::popframe_move_outgoing_args), r15_thread, c_rarg1, c_rarg2);
1702 #endif
1703 __ reset_last_Java_frame(thread, true);
1704
1705 // Restore the last_sp and null it out
1706 __ movptr(rsp, Address(rbp, frame::interpreter_frame_last_sp_offset * wordSize));
1707 __ movptr(Address(rbp, frame::interpreter_frame_last_sp_offset * wordSize), (int32_t)NULL_WORD);
1708
1709 __ restore_bcp();
1710 __ restore_locals();
1711 // The method data pointer was incremented already during
1712 // call profiling. We have to restore the mdp for the current bcp.
1713 if (ProfileInterpreter) {
1714 __ set_method_data_pointer_for_bcp();
1715 }
1716
1717 // Clear the popframe condition flag
1718 NOT_LP64(__ get_thread(thread));
1719 __ movl(Address(thread, JavaThread::popframe_condition_offset()),
1720 JavaThread::popframe_inactive);
1721
1722 #if INCLUDE_JVMTI
1723 {
1724 Label L_done;
1725 const Register local0 = rlocals;
1726
1727 __ cmpb(Address(rbcp, 0), Bytecodes::_invokestatic);
1728 __ jcc(Assembler::notEqual, L_done);
1729
1730 // The member name argument must be restored if _invokestatic is re-executed after a PopFrame call.
1731 // Detect such a case in the InterpreterRuntime function and return the member name argument, or NULL.
1732
1733 __ get_method(rdx);
1734 __ movptr(rax, Address(local0, 0));
1735 __ call_VM(rax, CAST_FROM_FN_PTR(address, InterpreterRuntime::member_name_arg_or_null), rax, rdx, rbcp);
1736
1737 __ testptr(rax, rax);
1738 __ jcc(Assembler::zero, L_done);
1739
1740 __ movptr(Address(rbx, 0), rax);
1741 __ bind(L_done);
1742 }
1743 #endif // INCLUDE_JVMTI
1744
1745 __ dispatch_next(vtos);
1746 // end of PopFrame support
1747
1748 Interpreter::_remove_activation_entry = __ pc();
1749
1750 // preserve exception over this code sequence
1751 __ pop_ptr(rax);
1752 NOT_LP64(__ get_thread(thread));
1753 __ movptr(Address(thread, JavaThread::vm_result_offset()), rax);
1754 // remove the activation (without doing throws on illegalMonitorExceptions)
1755 __ remove_activation(vtos, rdx, false, true, false);
1756 // restore exception
1757 NOT_LP64(__ get_thread(thread));
1758 __ get_vm_result(rax, thread);
1759
1760 // In between activations - previous activation type unknown yet
1761 // compute continuation point - the continuation point expects the
1762 // following registers set up:
1763 //
1764 // rax: exception
1765 // rdx: return address/pc that threw exception
1766 // rsp: expression stack of caller
1767 // rbp: ebp of caller
1768 __ push(rax); // save exception
1769 __ push(rdx); // save return address
1770 __ super_call_VM_leaf(CAST_FROM_FN_PTR(address,
1771 SharedRuntime::exception_handler_for_return_address),
1772 thread, rdx);
1773 __ mov(rbx, rax); // save exception handler
1774 __ pop(rdx); // restore return address
1775 __ pop(rax); // restore exception
1776 // Note that an "issuing PC" is actually the next PC after the call
1777 __ jmp(rbx); // jump to exception
1778 // handler of caller
1779 }
1780
1781
1782 //
1783 // JVMTI ForceEarlyReturn support
1784 //
1785 address TemplateInterpreterGenerator::generate_earlyret_entry_for(TosState state) {
1786 address entry = __ pc();
1787
1788 __ restore_bcp();
1789 __ restore_locals();
1790 __ empty_expression_stack();
1791 __ load_earlyret_value(state); // 32 bits returns value in rdx, so don't reuse
1792
1793 const Register thread = NOT_LP64(rcx) LP64_ONLY(r15_thread);
1794 NOT_LP64(__ get_thread(thread));
1795 __ movptr(rcx, Address(thread, JavaThread::jvmti_thread_state_offset()));
1796 Address cond_addr(rcx, JvmtiThreadState::earlyret_state_offset());
1797
1798 // Clear the earlyret state
1799 __ movl(cond_addr, JvmtiThreadState::earlyret_inactive);
1800
1801 __ remove_activation(state, rsi,
1802 false, /* throw_monitor_exception */
1803 false, /* install_monitor_exception */
1804 true); /* notify_jvmdi */
1805 __ jmp(rsi);
1806
1807 return entry;
1808 } // end of ForceEarlyReturn support
1809
1810
1811 //-----------------------------------------------------------------------------
1812 // Helper for vtos entry point generation
1813
1814 void TemplateInterpreterGenerator::set_vtos_entry_points(Template* t,
1815 address& bep,
1816 address& cep,
1817 address& sep,
1818 address& aep,
1819 address& iep,
1820 address& lep,
1821 address& fep,
1822 address& dep,
1823 address& vep) {
1824 assert(t->is_valid() && t->tos_in() == vtos, "illegal template");
1825 Label L;
1826 aep = __ pc(); // atos entry point
1827 __ push_ptr();
1828 __ jmp(L);
1829 #ifndef _LP64
1830 fep = __ pc(); // ftos entry point
1831 __ push(ftos);
1832 __ jmp(L);
1833 dep = __ pc(); // dtos entry point
1834 __ push(dtos);
1835 __ jmp(L);
1836 #else
1837 fep = __ pc(); // ftos entry point
1838 __ push_f(xmm0);
1839 __ jmp(L);
1840 dep = __ pc(); // dtos entry point
1841 __ push_d(xmm0);
1842 __ jmp(L);
1843 #endif // _LP64
1844 lep = __ pc(); // ltos entry point
1845 __ push_l();
1846 __ jmp(L);
1847 bep = cep = sep = iep = __ pc(); // [bcsi]tos entry point
1848 __ push_i();
1849 vep = __ pc(); // vtos entry point
1850 __ bind(L);
1851 generate_and_dispatch(t);
1852 }
1853
1854 //-----------------------------------------------------------------------------
1855
1856 // Non-product code
1857 #ifndef PRODUCT
1858
1859 address TemplateInterpreterGenerator::generate_trace_code(TosState state) {
1860 address entry = __ pc();
1861
1862 #ifndef _LP64
1863 // prepare expression stack
1864 __ pop(rcx); // pop return address so expression stack is 'pure'
1865 __ push(state); // save tosca
1866
1867 // pass tosca registers as arguments & call tracer
1868 __ call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::trace_bytecode), rcx, rax, rdx);
1869 __ mov(rcx, rax); // make sure return address is not destroyed by pop(state)
1870 __ pop(state); // restore tosca
1871
1872 // return
1873 __ jmp(rcx);
1874 #else
1875 __ push(state);
1876 __ push(c_rarg0);
1877 __ push(c_rarg1);
1878 __ push(c_rarg2);
1879 __ push(c_rarg3);
1880 __ mov(c_rarg2, rax); // Pass itos
1881 #ifdef _WIN64
1882 __ movflt(xmm3, xmm0); // Pass ftos
1883 #endif
1884 __ call_VM(noreg,
1885 CAST_FROM_FN_PTR(address, InterpreterRuntime::trace_bytecode),
1886 c_rarg1, c_rarg2, c_rarg3);
1887 __ pop(c_rarg3);
1888 __ pop(c_rarg2);
1889 __ pop(c_rarg1);
1890 __ pop(c_rarg0);
1891 __ pop(state);
1892 __ ret(0); // return from result handler
1893 #endif // _LP64
1894
1895 return entry;
1896 }
1897
1898 void TemplateInterpreterGenerator::count_bytecode() {
1899 __ incrementl(ExternalAddress((address) &BytecodeCounter::_counter_value));
1900 }
1901
1902 void TemplateInterpreterGenerator::histogram_bytecode(Template* t) {
1903 __ incrementl(ExternalAddress((address) &BytecodeHistogram::_counters[t->bytecode()]));
1904 }
1905
1906 void TemplateInterpreterGenerator::histogram_bytecode_pair(Template* t) {
1907 __ mov32(rbx, ExternalAddress((address) &BytecodePairHistogram::_index));
1908 __ shrl(rbx, BytecodePairHistogram::log2_number_of_codes);
1909 __ orl(rbx,
1910 ((int) t->bytecode()) <<
1911 BytecodePairHistogram::log2_number_of_codes);
1912 __ mov32(ExternalAddress((address) &BytecodePairHistogram::_index), rbx);
1913 __ lea(rscratch1, ExternalAddress((address) BytecodePairHistogram::_counters));
1914 __ incrementl(Address(rscratch1, rbx, Address::times_4));
1915 }
1916
1917
1918 void TemplateInterpreterGenerator::trace_bytecode(Template* t) {
1919 // Call a little run-time stub to avoid blow-up for each bytecode.
1920 // The run-time runtime saves the right registers, depending on
1921 // the tosca in-state for the given template.
1922
1923 assert(Interpreter::trace_code(t->tos_in()) != NULL,
1924 "entry must have been generated");
1925 #ifndef _LP64
1926 __ call(RuntimeAddress(Interpreter::trace_code(t->tos_in())));
1927 #else
1928 __ mov(r12, rsp); // remember sp (can only use r12 if not using call_VM)
1929 __ andptr(rsp, -16); // align stack as required by ABI
1930 __ call(RuntimeAddress(Interpreter::trace_code(t->tos_in())));
1931 __ mov(rsp, r12); // restore sp
1932 __ reinit_heapbase();
1933 #endif // _LP64
1934 }
1935
1936
1937 void TemplateInterpreterGenerator::stop_interpreter_at() {
1938 Label L;
1939 __ cmp32(ExternalAddress((address) &BytecodeCounter::_counter_value),
1940 StopInterpreterAt);
1941 __ jcc(Assembler::notEqual, L);
1942 __ int3();
1943 __ bind(L);
1944 }
1945 #endif // !PRODUCT