1 /*
2 * Copyright (c) 2003, 2017, 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/interp_masm.hpp"
29 #include "interpreter/interpreter.hpp"
30 #include "interpreter/interpreterRuntime.hpp"
31 #include "interpreter/templateInterpreterGenerator.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 "oops/valueKlass.hpp"
38 #include "prims/jvmtiExport.hpp"
39 #include "prims/jvmtiThreadState.hpp"
40 #include "runtime/arguments.hpp"
41 #include "runtime/deoptimization.hpp"
42 #include "runtime/frame.inline.hpp"
43 #include "runtime/sharedRuntime.hpp"
44 #include "runtime/stubRoutines.hpp"
45 #include "runtime/synchronizer.hpp"
46 #include "runtime/timer.hpp"
47 #include "runtime/vframeArray.hpp"
48 #include "utilities/debug.hpp"
49 #include "utilities/macros.hpp"
50
51 #define __ _masm->
52
53 // Size of interpreter code. Increase if too small. Interpreter will
54 // fail with a guarantee ("not enough space for interpreter generation");
55 // if too small.
56 // Run with +PrintInterpreter to get the VM to print out the size.
57 // Max size with JVMTI
58 #ifdef AMD64
59 int TemplateInterpreter::InterpreterCodeSize = JVMCI_ONLY(280) NOT_JVMCI(268) * 1024;
60 #else
61 int TemplateInterpreter::InterpreterCodeSize = 224 * 1024;
62 #endif // AMD64
63
64 // Global Register Names
65 static const Register rbcp = LP64_ONLY(r13) NOT_LP64(rsi);
66 static const Register rlocals = LP64_ONLY(r14) NOT_LP64(rdi);
67
68 const int method_offset = frame::interpreter_frame_method_offset * wordSize;
69 const int bcp_offset = frame::interpreter_frame_bcp_offset * wordSize;
70 const int locals_offset = frame::interpreter_frame_locals_offset * wordSize;
71
72
73 //-----------------------------------------------------------------------------
74
75 address TemplateInterpreterGenerator::generate_StackOverflowError_handler() {
76 address entry = __ pc();
77
78 #ifdef ASSERT
79 {
80 Label L;
81 __ lea(rax, Address(rbp,
82 frame::interpreter_frame_monitor_block_top_offset *
83 wordSize));
84 __ cmpptr(rax, rsp); // rax = maximal rsp for current rbp (stack
85 // grows negative)
86 __ jcc(Assembler::aboveEqual, L); // check if frame is complete
87 __ stop ("interpreter frame not set up");
88 __ bind(L);
89 }
90 #endif // ASSERT
91 // Restore bcp under the assumption that the current frame is still
92 // interpreted
93 __ restore_bcp();
94
95 // expression stack must be empty before entering the VM if an
96 // exception happened
97 __ empty_expression_stack();
98 // throw exception
99 __ call_VM(noreg,
100 CAST_FROM_FN_PTR(address,
101 InterpreterRuntime::throw_StackOverflowError));
102 return entry;
103 }
104
105 address TemplateInterpreterGenerator::generate_ArrayIndexOutOfBounds_handler(
106 const char* name) {
107 address entry = __ pc();
108 // expression stack must be empty before entering the VM if an
109 // exception happened
110 __ empty_expression_stack();
111 // setup parameters
112 // ??? convention: expect aberrant index in register ebx
113 Register rarg = NOT_LP64(rax) LP64_ONLY(c_rarg1);
114 __ lea(rarg, ExternalAddress((address)name));
115 __ call_VM(noreg,
116 CAST_FROM_FN_PTR(address,
117 InterpreterRuntime::
118 throw_ArrayIndexOutOfBoundsException),
119 rarg, rbx);
120 return entry;
121 }
122
123 address TemplateInterpreterGenerator::generate_ClassCastException_handler() {
124 address entry = __ pc();
125
126 // object is at TOS
127 Register rarg = NOT_LP64(rax) LP64_ONLY(c_rarg1);
128 __ pop(rarg);
129
130 // expression stack must be empty before entering the VM if an
131 // exception happened
132 __ empty_expression_stack();
133
134 __ call_VM(noreg,
135 CAST_FROM_FN_PTR(address,
136 InterpreterRuntime::
137 throw_ClassCastException),
138 rarg);
139 return entry;
140 }
141
142 address TemplateInterpreterGenerator::generate_exception_handler_common(
143 const char* name, const char* message, bool pass_oop) {
144 assert(!pass_oop || message == NULL, "either oop or message but not both");
145 address entry = __ pc();
146
147 Register rarg = NOT_LP64(rax) LP64_ONLY(c_rarg1);
148 Register rarg2 = NOT_LP64(rbx) LP64_ONLY(c_rarg2);
149
150 if (pass_oop) {
151 // object is at TOS
152 __ pop(rarg2);
153 }
154 // expression stack must be empty before entering the VM if an
155 // exception happened
156 __ empty_expression_stack();
157 // setup parameters
158 __ lea(rarg, ExternalAddress((address)name));
159 if (pass_oop) {
160 __ call_VM(rax, CAST_FROM_FN_PTR(address,
161 InterpreterRuntime::
162 create_klass_exception),
163 rarg, rarg2);
164 } else {
165 __ lea(rarg2, ExternalAddress((address)message));
166 __ call_VM(rax,
167 CAST_FROM_FN_PTR(address, InterpreterRuntime::create_exception),
168 rarg, rarg2);
169 }
170 // throw exception
171 __ jump(ExternalAddress(Interpreter::throw_exception_entry()));
172 return entry;
173 }
174
175 address TemplateInterpreterGenerator::generate_return_entry_for(TosState state, int step, size_t index_size) {
176 address entry = __ pc();
177
178 #ifndef _LP64
179 #ifdef COMPILER2
180 // The FPU stack is clean if UseSSE >= 2 but must be cleaned in other cases
181 if ((state == ftos && UseSSE < 1) || (state == dtos && UseSSE < 2)) {
182 for (int i = 1; i < 8; i++) {
183 __ ffree(i);
184 }
185 } else if (UseSSE < 2) {
186 __ empty_FPU_stack();
187 }
188 #endif // COMPILER2
189 if ((state == ftos && UseSSE < 1) || (state == dtos && UseSSE < 2)) {
190 __ MacroAssembler::verify_FPU(1, "generate_return_entry_for compiled");
191 } else {
192 __ MacroAssembler::verify_FPU(0, "generate_return_entry_for compiled");
193 }
194
195 if (state == ftos) {
196 __ MacroAssembler::verify_FPU(UseSSE >= 1 ? 0 : 1, "generate_return_entry_for in interpreter");
197 } else if (state == dtos) {
198 __ MacroAssembler::verify_FPU(UseSSE >= 2 ? 0 : 1, "generate_return_entry_for in interpreter");
199 }
200 #endif // _LP64
201
202 // Restore stack bottom in case i2c adjusted stack
203 __ movptr(rsp, Address(rbp, frame::interpreter_frame_last_sp_offset * wordSize));
204 // and NULL it as marker that esp is now tos until next java call
205 __ movptr(Address(rbp, frame::interpreter_frame_last_sp_offset * wordSize), (int32_t)NULL_WORD);
206
207 if (state == qtos && ValueTypeReturnedAsFields) {
208 #ifndef _LP64
209 __ super_call_VM_leaf(StubRoutines::store_value_type_fields_to_buf());
210 #else
211 // A value type is being returned. If fields are in registers we
212 // need to allocate a value type instance and initialize it with
213 // the value of the fields.
214 Label skip, slow_case;
215 // We only need a new buffered value if a new one is not returned
216 __ testptr(rax, 1);
217 __ jcc(Assembler::zero, skip);
218
219 // Try to allocate a new buffered value (from the heap)
220 if (UseTLAB) {
221 __ mov(rbx, rax);
222 __ andptr(rbx, -2);
223
224 __ movl(r14, Address(rbx, Klass::layout_helper_offset()));
225
226 __ movptr(r13, Address(r15_thread, in_bytes(JavaThread::tlab_top_offset())));
227 __ lea(r14, Address(r13, r14, Address::times_1));
228 __ cmpptr(r14, Address(r15_thread, in_bytes(JavaThread::tlab_end_offset())));
229 __ jcc(Assembler::above, slow_case);
230 __ movptr(Address(r15_thread, in_bytes(JavaThread::tlab_top_offset())), r14);
231
232 if (UseBiasedLocking) {
233 __ movptr(rax, Address(rbx, Klass::prototype_header_offset()));
234 __ movptr(Address(r13, oopDesc::mark_offset_in_bytes ()), rax);
235 } else {
236 __ movptr(Address(r13, oopDesc::mark_offset_in_bytes ()),
237 (intptr_t)markOopDesc::prototype());
238 }
239 __ xorl(rax, rax); // use zero reg to clear memory (shorter code)
240 __ store_klass_gap(r13, rax); // zero klass gap for compressed oops
241 __ mov(rax, rbx);
242 __ store_klass(r13, rbx); // klass
243
244 // We have our new buffered value, initialize its fields with a
245 // value class specific handler
246 __ movptr(rbx, Address(rax, ValueKlass::pack_handler_offset()));
247 __ mov(rax, r13);
248 __ call(rbx);
249 __ jmp(skip);
250 }
251
252 __ bind(slow_case);
253 // We failed to allocate a new value, fall back to a runtime
254 // call. Some oop field may be live in some registers but we can't
255 // tell. That runtime call will take care of preserving them
256 // across a GC if there's one.
257 __ super_call_VM_leaf(StubRoutines::store_value_type_fields_to_buf());
258 __ bind(skip);
259
260 if (ReturnValuesInThreadLocalBuffer) {
261 // vt_alloc_ptr adjustment
262 Label no_adjustment;
263 __ cmpptr(rax, Address(r15_thread, in_bytes(JavaThread::vt_alloc_ptr_offset())));
264 __ jcc(Assembler::notEqual, no_adjustment);
265 __ load_klass(rbx, rax);
266 __ movl(r13, Address(rbx, Klass::layout_helper_offset()));
267 __ lea(r14, Address(rax, r13, Address::times_1));
268 __ movptr(Address(r15_thread, in_bytes(JavaThread::vt_alloc_ptr_offset())), r14);
269 __ bind(no_adjustment);
270 }
271
272 #endif
273 }
274
275 __ restore_bcp();
276 __ restore_locals();
277
278 if (state == atos) {
279 Register mdp = rbx;
280 Register tmp = rcx;
281 __ profile_return_type(mdp, rax, tmp);
282 }
283
284 const Register cache = rbx;
285 const Register index = rcx;
286 __ get_cache_and_index_at_bcp(cache, index, 1, index_size);
287
288 const Register flags = cache;
289 __ movl(flags, Address(cache, index, Address::times_ptr, ConstantPoolCache::base_offset() + ConstantPoolCacheEntry::flags_offset()));
290 __ andl(flags, ConstantPoolCacheEntry::parameter_size_mask);
291 __ lea(rsp, Address(rsp, flags, Interpreter::stackElementScale()));
292
293 const Register java_thread = NOT_LP64(rcx) LP64_ONLY(r15_thread);
294 if (JvmtiExport::can_pop_frame()) {
295 NOT_LP64(__ get_thread(java_thread));
296 __ check_and_handle_popframe(java_thread);
297 }
298 if (JvmtiExport::can_force_early_return()) {
299 NOT_LP64(__ get_thread(java_thread));
300 __ check_and_handle_earlyret(java_thread);
301 }
302
303 __ dispatch_next(state, step);
304
305 return entry;
306 }
307
308
309 address TemplateInterpreterGenerator::generate_deopt_entry_for(TosState state, int step, address continuation) {
310 address entry = __ pc();
311
312 #ifndef _LP64
313 if (state == ftos) {
314 __ MacroAssembler::verify_FPU(UseSSE >= 1 ? 0 : 1, "generate_deopt_entry_for in interpreter");
315 } else if (state == dtos) {
316 __ MacroAssembler::verify_FPU(UseSSE >= 2 ? 0 : 1, "generate_deopt_entry_for in interpreter");
317 }
318 #endif // _LP64
319
320 // NULL last_sp until next java call
321 __ movptr(Address(rbp, frame::interpreter_frame_last_sp_offset * wordSize), (int32_t)NULL_WORD);
322 __ restore_bcp();
323 __ restore_locals();
324 const Register thread = NOT_LP64(rcx) LP64_ONLY(r15_thread);
325 NOT_LP64(__ get_thread(thread));
326 #if INCLUDE_JVMCI
327 // Check if we need to take lock at entry of synchronized method. This can
328 // only occur on method entry so emit it only for vtos with step 0.
329 if ((EnableJVMCI || UseAOT) && state == vtos && step == 0) {
330 Label L;
331 __ cmpb(Address(thread, JavaThread::pending_monitorenter_offset()), 0);
332 __ jcc(Assembler::zero, L);
333 // Clear flag.
334 __ movb(Address(thread, JavaThread::pending_monitorenter_offset()), 0);
335 // Satisfy calling convention for lock_method().
336 __ get_method(rbx);
337 // Take lock.
338 lock_method();
339 __ bind(L);
340 } else {
341 #ifdef ASSERT
342 if (EnableJVMCI) {
343 Label L;
344 __ cmpb(Address(r15_thread, JavaThread::pending_monitorenter_offset()), 0);
345 __ jccb(Assembler::zero, L);
346 __ stop("unexpected pending monitor in deopt entry");
347 __ bind(L);
348 }
349 #endif
350 }
351 #endif
352 // handle exceptions
353 {
354 Label L;
355 __ cmpptr(Address(thread, Thread::pending_exception_offset()), (int32_t) NULL_WORD);
356 __ jcc(Assembler::zero, L);
357 __ call_VM(noreg,
358 CAST_FROM_FN_PTR(address,
359 InterpreterRuntime::throw_pending_exception));
360 __ should_not_reach_here();
361 __ bind(L);
362 }
363 if (continuation == NULL) {
364 __ dispatch_next(state, step);
365 } else {
366 __ jump_to_entry(continuation);
367 }
368 return entry;
369 }
370
371 address TemplateInterpreterGenerator::generate_result_handler_for(
372 BasicType type) {
373 address entry = __ pc();
374 switch (type) {
375 case T_BOOLEAN: __ c2bool(rax); break;
376 #ifndef _LP64
377 case T_CHAR : __ andptr(rax, 0xFFFF); break;
378 #else
379 case T_CHAR : __ movzwl(rax, rax); break;
380 #endif // _LP64
381 case T_BYTE : __ sign_extend_byte(rax); break;
382 case T_SHORT : __ sign_extend_short(rax); break;
383 case T_INT : /* nothing to do */ break;
384 case T_LONG : /* nothing to do */ break;
385 case T_VOID : /* nothing to do */ break;
386 #ifndef _LP64
387 case T_DOUBLE :
388 case T_FLOAT :
389 { const Register t = InterpreterRuntime::SignatureHandlerGenerator::temp();
390 __ pop(t); // remove return address first
391 // Must return a result for interpreter or compiler. In SSE
392 // mode, results are returned in xmm0 and the FPU stack must
393 // be empty.
394 if (type == T_FLOAT && UseSSE >= 1) {
395 // Load ST0
396 __ fld_d(Address(rsp, 0));
397 // Store as float and empty fpu stack
398 __ fstp_s(Address(rsp, 0));
399 // and reload
400 __ movflt(xmm0, Address(rsp, 0));
401 } else if (type == T_DOUBLE && UseSSE >= 2 ) {
402 __ movdbl(xmm0, Address(rsp, 0));
403 } else {
404 // restore ST0
405 __ fld_d(Address(rsp, 0));
406 }
407 // and pop the temp
408 __ addptr(rsp, 2 * wordSize);
409 __ push(t); // restore return address
410 }
411 break;
412 #else
413 case T_FLOAT : /* nothing to do */ break;
414 case T_DOUBLE : /* nothing to do */ break;
415 #endif // _LP64
416
417 case T_VALUETYPE: // fall through (value types are handled with oops)
418 case T_OBJECT :
419 // retrieve result from frame
420 __ movptr(rax, Address(rbp, frame::interpreter_frame_oop_temp_offset*wordSize));
421 // and verify it
422 __ verify_oop(rax);
423 break;
424 default : ShouldNotReachHere();
425 }
426 __ ret(0); // return from result handler
427 return entry;
428 }
429
430 address TemplateInterpreterGenerator::generate_safept_entry_for(
431 TosState state,
432 address runtime_entry) {
433 address entry = __ pc();
434 __ push(state);
435 __ call_VM(noreg, runtime_entry);
436 __ dispatch_via(vtos, Interpreter::_normal_table.table_for(vtos));
437 return entry;
438 }
439
440
441
442 // Helpers for commoning out cases in the various type of method entries.
443 //
444
445
446 // increment invocation count & check for overflow
447 //
448 // Note: checking for negative value instead of overflow
449 // so we have a 'sticky' overflow test
450 //
451 // rbx: method
452 // rcx: invocation counter
453 //
454 void TemplateInterpreterGenerator::generate_counter_incr(
455 Label* overflow,
456 Label* profile_method,
457 Label* profile_method_continue) {
458 Label done;
459 // Note: In tiered we increment either counters in Method* or in MDO depending if we're profiling or not.
460 if (TieredCompilation) {
461 int increment = InvocationCounter::count_increment;
462 Label no_mdo;
463 if (ProfileInterpreter) {
464 // Are we profiling?
465 __ movptr(rax, Address(rbx, Method::method_data_offset()));
466 __ testptr(rax, rax);
467 __ jccb(Assembler::zero, no_mdo);
468 // Increment counter in the MDO
469 const Address mdo_invocation_counter(rax, in_bytes(MethodData::invocation_counter_offset()) +
470 in_bytes(InvocationCounter::counter_offset()));
471 const Address mask(rax, in_bytes(MethodData::invoke_mask_offset()));
472 __ increment_mask_and_jump(mdo_invocation_counter, increment, mask, rcx, false, Assembler::zero, overflow);
473 __ jmp(done);
474 }
475 __ bind(no_mdo);
476 // Increment counter in MethodCounters
477 const Address invocation_counter(rax,
478 MethodCounters::invocation_counter_offset() +
479 InvocationCounter::counter_offset());
480 __ get_method_counters(rbx, rax, done);
481 const Address mask(rax, in_bytes(MethodCounters::invoke_mask_offset()));
482 __ increment_mask_and_jump(invocation_counter, increment, mask, rcx,
483 false, Assembler::zero, overflow);
484 __ bind(done);
485 } else { // not TieredCompilation
486 const Address backedge_counter(rax,
487 MethodCounters::backedge_counter_offset() +
488 InvocationCounter::counter_offset());
489 const Address invocation_counter(rax,
490 MethodCounters::invocation_counter_offset() +
491 InvocationCounter::counter_offset());
492
493 __ get_method_counters(rbx, rax, done);
494
495 if (ProfileInterpreter) {
496 __ incrementl(Address(rax,
497 MethodCounters::interpreter_invocation_counter_offset()));
498 }
499 // Update standard invocation counters
500 __ movl(rcx, invocation_counter);
501 __ incrementl(rcx, InvocationCounter::count_increment);
502 __ movl(invocation_counter, rcx); // save invocation count
503
504 __ movl(rax, backedge_counter); // load backedge counter
505 __ andl(rax, InvocationCounter::count_mask_value); // mask out the status bits
506
507 __ addl(rcx, rax); // add both counters
508
509 // profile_method is non-null only for interpreted method so
510 // profile_method != NULL == !native_call
511
512 if (ProfileInterpreter && profile_method != NULL) {
513 // Test to see if we should create a method data oop
514 __ movptr(rax, Address(rbx, Method::method_counters_offset()));
515 __ cmp32(rcx, Address(rax, in_bytes(MethodCounters::interpreter_profile_limit_offset())));
516 __ jcc(Assembler::less, *profile_method_continue);
517
518 // if no method data exists, go to profile_method
519 __ test_method_data_pointer(rax, *profile_method);
520 }
521
522 __ movptr(rax, Address(rbx, Method::method_counters_offset()));
523 __ cmp32(rcx, Address(rax, in_bytes(MethodCounters::interpreter_invocation_limit_offset())));
524 __ jcc(Assembler::aboveEqual, *overflow);
525 __ bind(done);
526 }
527 }
528
529 void TemplateInterpreterGenerator::generate_counter_overflow(Label& do_continue) {
530
531 // Asm interpreter on entry
532 // r14/rdi - locals
533 // r13/rsi - bcp
534 // rbx - method
535 // rdx - cpool --- DOES NOT APPEAR TO BE TRUE
536 // rbp - interpreter frame
537
538 // On return (i.e. jump to entry_point) [ back to invocation of interpreter ]
539 // Everything as it was on entry
540 // rdx is not restored. Doesn't appear to really be set.
541
542 // InterpreterRuntime::frequency_counter_overflow takes two
543 // arguments, the first (thread) is passed by call_VM, the second
544 // indicates if the counter overflow occurs at a backwards branch
545 // (NULL bcp). We pass zero for it. The call returns the address
546 // of the verified entry point for the method or NULL if the
547 // compilation did not complete (either went background or bailed
548 // out).
549 Register rarg = NOT_LP64(rax) LP64_ONLY(c_rarg1);
550 __ movl(rarg, 0);
551 __ call_VM(noreg,
552 CAST_FROM_FN_PTR(address,
553 InterpreterRuntime::frequency_counter_overflow),
554 rarg);
555
556 __ movptr(rbx, Address(rbp, method_offset)); // restore Method*
557 // Preserve invariant that r13/r14 contain bcp/locals of sender frame
558 // and jump to the interpreted entry.
559 __ jmp(do_continue, relocInfo::none);
560 }
561
562 // See if we've got enough room on the stack for locals plus overhead below
563 // JavaThread::stack_overflow_limit(). If not, throw a StackOverflowError
564 // without going through the signal handler, i.e., reserved and yellow zones
565 // will not be made usable. The shadow zone must suffice to handle the
566 // overflow.
567 // The expression stack grows down incrementally, so the normal guard
568 // page mechanism will work for that.
569 //
570 // NOTE: Since the additional locals are also always pushed (wasn't
571 // obvious in generate_fixed_frame) so the guard should work for them
572 // too.
573 //
574 // Args:
575 // rdx: number of additional locals this frame needs (what we must check)
576 // rbx: Method*
577 //
578 // Kills:
579 // rax
580 void TemplateInterpreterGenerator::generate_stack_overflow_check(void) {
581
582 // monitor entry size: see picture of stack in frame_x86.hpp
583 const int entry_size = frame::interpreter_frame_monitor_size() * wordSize;
584
585 // total overhead size: entry_size + (saved rbp through expr stack
586 // bottom). be sure to change this if you add/subtract anything
587 // to/from the overhead area
588 const int overhead_size =
589 -(frame::interpreter_frame_initial_sp_offset * wordSize) + entry_size;
590
591 const int page_size = os::vm_page_size();
592
593 Label after_frame_check;
594
595 // see if the frame is greater than one page in size. If so,
596 // then we need to verify there is enough stack space remaining
597 // for the additional locals.
598 __ cmpl(rdx, (page_size - overhead_size) / Interpreter::stackElementSize);
599 __ jcc(Assembler::belowEqual, after_frame_check);
600
601 // compute rsp as if this were going to be the last frame on
602 // the stack before the red zone
603
604 Label after_frame_check_pop;
605 const Register thread = NOT_LP64(rsi) LP64_ONLY(r15_thread);
606 #ifndef _LP64
607 __ push(thread);
608 __ get_thread(thread);
609 #endif
610
611 const Address stack_limit(thread, JavaThread::stack_overflow_limit_offset());
612
613 // locals + overhead, in bytes
614 __ mov(rax, rdx);
615 __ shlptr(rax, Interpreter::logStackElementSize); // Convert parameter count to bytes.
616 __ addptr(rax, overhead_size);
617
618 #ifdef ASSERT
619 Label limit_okay;
620 // Verify that thread stack overflow limit is non-zero.
621 __ cmpptr(stack_limit, (int32_t)NULL_WORD);
622 __ jcc(Assembler::notEqual, limit_okay);
623 __ stop("stack overflow limit is zero");
624 __ bind(limit_okay);
625 #endif
626
627 // Add locals/frame size to stack limit.
628 __ addptr(rax, stack_limit);
629
630 // Check against the current stack bottom.
631 __ cmpptr(rsp, rax);
632
633 __ jcc(Assembler::above, after_frame_check_pop);
634 NOT_LP64(__ pop(rsi)); // get saved bcp
635
636 // Restore sender's sp as SP. This is necessary if the sender's
637 // frame is an extended compiled frame (see gen_c2i_adapter())
638 // and safer anyway in case of JSR292 adaptations.
639
640 __ pop(rax); // return address must be moved if SP is changed
641 __ mov(rsp, rbcp);
642 __ push(rax);
643
644 // Note: the restored frame is not necessarily interpreted.
645 // Use the shared runtime version of the StackOverflowError.
646 assert(StubRoutines::throw_StackOverflowError_entry() != NULL, "stub not yet generated");
647 __ jump(ExternalAddress(StubRoutines::throw_StackOverflowError_entry()));
648 // all done with frame size check
649 __ bind(after_frame_check_pop);
650 NOT_LP64(__ pop(rsi));
651
652 // all done with frame size check
653 __ bind(after_frame_check);
654 }
655
656 // Allocate monitor and lock method (asm interpreter)
657 //
658 // Args:
659 // rbx: Method*
660 // r14/rdi: locals
661 //
662 // Kills:
663 // rax
664 // c_rarg0, c_rarg1, c_rarg2, c_rarg3, ...(param regs)
665 // rscratch1, rscratch2 (scratch regs)
666 void TemplateInterpreterGenerator::lock_method() {
667 // synchronize method
668 const Address access_flags(rbx, Method::access_flags_offset());
669 const Address monitor_block_top(
670 rbp,
671 frame::interpreter_frame_monitor_block_top_offset * wordSize);
672 const int entry_size = frame::interpreter_frame_monitor_size() * wordSize;
673
674 #ifdef ASSERT
675 {
676 Label L;
677 __ movl(rax, access_flags);
678 __ testl(rax, JVM_ACC_SYNCHRONIZED);
679 __ jcc(Assembler::notZero, L);
680 __ stop("method doesn't need synchronization");
681 __ bind(L);
682 }
683 #endif // ASSERT
684
685 // get synchronization object
686 {
687 Label done;
688 __ movl(rax, access_flags);
689 __ testl(rax, JVM_ACC_STATIC);
690 // get receiver (assume this is frequent case)
691 __ movptr(rax, Address(rlocals, Interpreter::local_offset_in_bytes(0)));
692 __ jcc(Assembler::zero, done);
693 __ load_mirror(rax, rbx);
694
695 #ifdef ASSERT
696 {
697 Label L;
698 __ testptr(rax, rax);
699 __ jcc(Assembler::notZero, L);
700 __ stop("synchronization object is NULL");
701 __ bind(L);
702 }
703 #endif // ASSERT
704
705 __ bind(done);
706 }
707
708 // add space for monitor & lock
709 __ subptr(rsp, entry_size); // add space for a monitor entry
710 __ movptr(monitor_block_top, rsp); // set new monitor block top
711 // store object
712 __ movptr(Address(rsp, BasicObjectLock::obj_offset_in_bytes()), rax);
713 const Register lockreg = NOT_LP64(rdx) LP64_ONLY(c_rarg1);
714 __ movptr(lockreg, rsp); // object address
715 __ lock_object(lockreg);
716 }
717
718 // Generate a fixed interpreter frame. This is identical setup for
719 // interpreted methods and for native methods hence the shared code.
720 //
721 // Args:
722 // rax: return address
723 // rbx: Method*
724 // r14/rdi: pointer to locals
725 // r13/rsi: sender sp
726 // rdx: cp cache
727 void TemplateInterpreterGenerator::generate_fixed_frame(bool native_call) {
728 // initialize fixed part of activation frame
729 __ push(rax); // save return address
730 __ enter(); // save old & set new rbp
731 __ push(rbcp); // set sender sp
732 __ push((int)NULL_WORD); // leave last_sp as null
733 __ movptr(rbcp, Address(rbx, Method::const_offset())); // get ConstMethod*
734 __ lea(rbcp, Address(rbcp, ConstMethod::codes_offset())); // get codebase
735 __ push(rbx); // save Method*
736 // Get mirror and store it in the frame as GC root for this Method*
737 __ load_mirror(rdx, rbx);
738 __ push(rdx);
739 if (ProfileInterpreter) {
740 Label method_data_continue;
741 __ movptr(rdx, Address(rbx, in_bytes(Method::method_data_offset())));
742 __ testptr(rdx, rdx);
743 __ jcc(Assembler::zero, method_data_continue);
744 __ addptr(rdx, in_bytes(MethodData::data_offset()));
745 __ bind(method_data_continue);
746 __ push(rdx); // set the mdp (method data pointer)
747 } else {
748 __ push(0);
749 }
750
751 __ movptr(rdx, Address(rbx, Method::const_offset()));
752 __ movptr(rdx, Address(rdx, ConstMethod::constants_offset()));
753 __ movptr(rdx, Address(rdx, ConstantPool::cache_offset_in_bytes()));
754 __ push(rdx); // set constant pool cache
755 const Register thread1 = NOT_LP64(rdx) LP64_ONLY(r15_thread);
756 NOT_LP64(__ get_thread(thread1));
757 __ movptr(rdx, Address(thread1, JavaThread::vt_alloc_ptr_offset()));
758 __ push(rdx); // value type allocation pointer when activation is created
759 __ push(rlocals); // set locals pointer
760 if (native_call) {
761 __ push(0); // no bcp
762 } else {
763 __ push(rbcp); // set bcp
764 }
765 __ push(0); // reserve word for pointer to expression stack bottom
766 __ movptr(Address(rsp, 0), rsp); // set expression stack bottom
767 }
768
769 // End of helpers
770
771 // Method entry for java.lang.ref.Reference.get.
772 address TemplateInterpreterGenerator::generate_Reference_get_entry(void) {
773 #if INCLUDE_ALL_GCS
774 // Code: _aload_0, _getfield, _areturn
775 // parameter size = 1
776 //
777 // The code that gets generated by this routine is split into 2 parts:
778 // 1. The "intrinsified" code for G1 (or any SATB based GC),
779 // 2. The slow path - which is an expansion of the regular method entry.
780 //
781 // Notes:-
782 // * In the G1 code we do not check whether we need to block for
783 // a safepoint. If G1 is enabled then we must execute the specialized
784 // code for Reference.get (except when the Reference object is null)
785 // so that we can log the value in the referent field with an SATB
786 // update buffer.
787 // If the code for the getfield template is modified so that the
788 // G1 pre-barrier code is executed when the current method is
789 // Reference.get() then going through the normal method entry
790 // will be fine.
791 // * The G1 code can, however, check the receiver object (the instance
792 // of java.lang.Reference) and jump to the slow path if null. If the
793 // Reference object is null then we obviously cannot fetch the referent
794 // and so we don't need to call the G1 pre-barrier. Thus we can use the
795 // regular method entry code to generate the NPE.
796 //
797 // rbx: Method*
798
799 // r13: senderSP must preserve for slow path, set SP to it on fast path
800
801 address entry = __ pc();
802
803 const int referent_offset = java_lang_ref_Reference::referent_offset;
804 guarantee(referent_offset > 0, "referent offset not initialized");
805
806 if (UseG1GC) {
807 Label slow_path;
808 // rbx: method
809
810 // Check if local 0 != NULL
811 // If the receiver is null then it is OK to jump to the slow path.
812 __ movptr(rax, Address(rsp, wordSize));
813
814 __ testptr(rax, rax);
815 __ jcc(Assembler::zero, slow_path);
816
817 // rax: local 0
818 // rbx: method (but can be used as scratch now)
819 // rdx: scratch
820 // rdi: scratch
821
822 // Preserve the sender sp in case the pre-barrier
823 // calls the runtime
824 NOT_LP64(__ push(rsi));
825
826 // Generate the G1 pre-barrier code to log the value of
827 // the referent field in an SATB buffer.
828
829 // Load the value of the referent field.
830 const Address field_address(rax, referent_offset);
831 __ load_heap_oop(rax, field_address);
832
833 const Register sender_sp = NOT_LP64(rsi) LP64_ONLY(r13);
834 const Register thread = NOT_LP64(rcx) LP64_ONLY(r15_thread);
835 NOT_LP64(__ get_thread(thread));
836
837 // Generate the G1 pre-barrier code to log the value of
838 // the referent field in an SATB buffer.
839 __ g1_write_barrier_pre(noreg /* obj */,
840 rax /* pre_val */,
841 thread /* thread */,
842 rbx /* tmp */,
843 true /* tosca_live */,
844 true /* expand_call */);
845
846 // _areturn
847 NOT_LP64(__ pop(rsi)); // get sender sp
848 __ pop(rdi); // get return address
849 __ mov(rsp, sender_sp); // set sp to sender sp
850 __ jmp(rdi);
851 __ ret(0);
852
853 // generate a vanilla interpreter entry as the slow path
854 __ bind(slow_path);
855 __ jump_to_entry(Interpreter::entry_for_kind(Interpreter::zerolocals));
856 return entry;
857 }
858 #endif // INCLUDE_ALL_GCS
859
860 // If G1 is not enabled then attempt to go through the accessor entry point
861 // Reference.get is an accessor
862 return NULL;
863 }
864
865 void TemplateInterpreterGenerator::bang_stack_shadow_pages(bool native_call) {
866 // Quick & dirty stack overflow checking: bang the stack & handle trap.
867 // Note that we do the banging after the frame is setup, since the exception
868 // handling code expects to find a valid interpreter frame on the stack.
869 // Doing the banging earlier fails if the caller frame is not an interpreter
870 // frame.
871 // (Also, the exception throwing code expects to unlock any synchronized
872 // method receiever, so do the banging after locking the receiver.)
873
874 // Bang each page in the shadow zone. We can't assume it's been done for
875 // an interpreter frame with greater than a page of locals, so each page
876 // needs to be checked. Only true for non-native.
877 if (UseStackBanging) {
878 const int page_size = os::vm_page_size();
879 const int n_shadow_pages = ((int)JavaThread::stack_shadow_zone_size()) / page_size;
880 const int start_page = native_call ? n_shadow_pages : 1;
881 for (int pages = start_page; pages <= n_shadow_pages; pages++) {
882 __ bang_stack_with_offset(pages*page_size);
883 }
884 }
885 }
886
887 // Interpreter stub for calling a native method. (asm interpreter)
888 // This sets up a somewhat different looking stack for calling the
889 // native method than the typical interpreter frame setup.
890 address TemplateInterpreterGenerator::generate_native_entry(bool synchronized) {
891 // determine code generation flags
892 bool inc_counter = UseCompiler || CountCompiledCalls || LogTouchedMethods;
893
894 // rbx: Method*
895 // rbcp: sender sp
896
897 address entry_point = __ pc();
898
899 const Address constMethod (rbx, Method::const_offset());
900 const Address access_flags (rbx, Method::access_flags_offset());
901 const Address size_of_parameters(rcx, ConstMethod::
902 size_of_parameters_offset());
903
904
905 // get parameter size (always needed)
906 __ movptr(rcx, constMethod);
907 __ load_unsigned_short(rcx, size_of_parameters);
908
909 // native calls don't need the stack size check since they have no
910 // expression stack and the arguments are already on the stack and
911 // we only add a handful of words to the stack
912
913 // rbx: Method*
914 // rcx: size of parameters
915 // rbcp: sender sp
916 __ pop(rax); // get return address
917
918 // for natives the size of locals is zero
919
920 // compute beginning of parameters
921 __ lea(rlocals, Address(rsp, rcx, Interpreter::stackElementScale(), -wordSize));
922
923 // add 2 zero-initialized slots for native calls
924 // initialize result_handler slot
925 __ push((int) NULL_WORD);
926 // slot for oop temp
927 // (static native method holder mirror/jni oop result)
928 __ push((int) NULL_WORD);
929
930 // initialize fixed part of activation frame
931 generate_fixed_frame(true);
932
933 // make sure method is native & not abstract
934 #ifdef ASSERT
935 __ movl(rax, access_flags);
936 {
937 Label L;
938 __ testl(rax, JVM_ACC_NATIVE);
939 __ jcc(Assembler::notZero, L);
940 __ stop("tried to execute non-native method as native");
941 __ bind(L);
942 }
943 {
944 Label L;
945 __ testl(rax, JVM_ACC_ABSTRACT);
946 __ jcc(Assembler::zero, L);
947 __ stop("tried to execute abstract method in interpreter");
948 __ bind(L);
949 }
950 #endif
951
952 // Since at this point in the method invocation the exception handler
953 // would try to exit the monitor of synchronized methods which hasn't
954 // been entered yet, we set the thread local variable
955 // _do_not_unlock_if_synchronized to true. The remove_activation will
956 // check this flag.
957
958 const Register thread1 = NOT_LP64(rax) LP64_ONLY(r15_thread);
959 NOT_LP64(__ get_thread(thread1));
960 const Address do_not_unlock_if_synchronized(thread1,
961 in_bytes(JavaThread::do_not_unlock_if_synchronized_offset()));
962 __ movbool(do_not_unlock_if_synchronized, true);
963
964 // increment invocation count & check for overflow
965 Label invocation_counter_overflow;
966 if (inc_counter) {
967 generate_counter_incr(&invocation_counter_overflow, NULL, NULL);
968 }
969
970 Label continue_after_compile;
971 __ bind(continue_after_compile);
972
973 bang_stack_shadow_pages(true);
974
975 // reset the _do_not_unlock_if_synchronized flag
976 NOT_LP64(__ get_thread(thread1));
977 __ movbool(do_not_unlock_if_synchronized, false);
978
979 // check for synchronized methods
980 // Must happen AFTER invocation_counter check and stack overflow check,
981 // so method is not locked if overflows.
982 if (synchronized) {
983 lock_method();
984 } else {
985 // no synchronization necessary
986 #ifdef ASSERT
987 {
988 Label L;
989 __ movl(rax, access_flags);
990 __ testl(rax, JVM_ACC_SYNCHRONIZED);
991 __ jcc(Assembler::zero, L);
992 __ stop("method needs synchronization");
993 __ bind(L);
994 }
995 #endif
996 }
997
998 // start execution
999 #ifdef ASSERT
1000 {
1001 Label L;
1002 const Address monitor_block_top(rbp,
1003 frame::interpreter_frame_monitor_block_top_offset * wordSize);
1004 __ movptr(rax, monitor_block_top);
1005 __ cmpptr(rax, rsp);
1006 __ jcc(Assembler::equal, L);
1007 __ stop("broken stack frame setup in interpreter");
1008 __ bind(L);
1009 }
1010 #endif
1011
1012 // jvmti support
1013 __ notify_method_entry();
1014
1015 // work registers
1016 const Register method = rbx;
1017 const Register thread = NOT_LP64(rdi) LP64_ONLY(r15_thread);
1018 const Register t = NOT_LP64(rcx) LP64_ONLY(r11);
1019
1020 // allocate space for parameters
1021 __ get_method(method);
1022 __ movptr(t, Address(method, Method::const_offset()));
1023 __ load_unsigned_short(t, Address(t, ConstMethod::size_of_parameters_offset()));
1024
1025 #ifndef _LP64
1026 __ shlptr(t, Interpreter::logStackElementSize); // Convert parameter count to bytes.
1027 __ addptr(t, 2*wordSize); // allocate two more slots for JNIEnv and possible mirror
1028 __ subptr(rsp, t);
1029 __ andptr(rsp, -(StackAlignmentInBytes)); // gcc needs 16 byte aligned stacks to do XMM intrinsics
1030 #else
1031 __ shll(t, Interpreter::logStackElementSize);
1032
1033 __ subptr(rsp, t);
1034 __ subptr(rsp, frame::arg_reg_save_area_bytes); // windows
1035 __ andptr(rsp, -16); // must be 16 byte boundary (see amd64 ABI)
1036 #endif // _LP64
1037
1038 // get signature handler
1039 {
1040 Label L;
1041 __ movptr(t, Address(method, Method::signature_handler_offset()));
1042 __ testptr(t, t);
1043 __ jcc(Assembler::notZero, L);
1044 __ call_VM(noreg,
1045 CAST_FROM_FN_PTR(address,
1046 InterpreterRuntime::prepare_native_call),
1047 method);
1048 __ get_method(method);
1049 __ movptr(t, Address(method, Method::signature_handler_offset()));
1050 __ bind(L);
1051 }
1052
1053 // call signature handler
1054 assert(InterpreterRuntime::SignatureHandlerGenerator::from() == rlocals,
1055 "adjust this code");
1056 assert(InterpreterRuntime::SignatureHandlerGenerator::to() == rsp,
1057 "adjust this code");
1058 assert(InterpreterRuntime::SignatureHandlerGenerator::temp() == NOT_LP64(t) LP64_ONLY(rscratch1),
1059 "adjust this code");
1060
1061 // The generated handlers do not touch RBX (the method oop).
1062 // However, large signatures cannot be cached and are generated
1063 // each time here. The slow-path generator can do a GC on return,
1064 // so we must reload it after the call.
1065 __ call(t);
1066 __ get_method(method); // slow path can do a GC, reload RBX
1067
1068
1069 // result handler is in rax
1070 // set result handler
1071 __ movptr(Address(rbp,
1072 (frame::interpreter_frame_result_handler_offset) * wordSize),
1073 rax);
1074
1075 // pass mirror handle if static call
1076 {
1077 Label L;
1078 __ movl(t, Address(method, Method::access_flags_offset()));
1079 __ testl(t, JVM_ACC_STATIC);
1080 __ jcc(Assembler::zero, L);
1081 // get mirror
1082 __ load_mirror(t, method);
1083 // copy mirror into activation frame
1084 __ movptr(Address(rbp, frame::interpreter_frame_oop_temp_offset * wordSize),
1085 t);
1086 // pass handle to mirror
1087 #ifndef _LP64
1088 __ lea(t, Address(rbp, frame::interpreter_frame_oop_temp_offset * wordSize));
1089 __ movptr(Address(rsp, wordSize), t);
1090 #else
1091 __ lea(c_rarg1,
1092 Address(rbp, frame::interpreter_frame_oop_temp_offset * wordSize));
1093 #endif // _LP64
1094 __ bind(L);
1095 }
1096
1097 // get native function entry point
1098 {
1099 Label L;
1100 __ movptr(rax, Address(method, Method::native_function_offset()));
1101 ExternalAddress unsatisfied(SharedRuntime::native_method_throw_unsatisfied_link_error_entry());
1102 __ cmpptr(rax, unsatisfied.addr());
1103 __ jcc(Assembler::notEqual, L);
1104 __ call_VM(noreg,
1105 CAST_FROM_FN_PTR(address,
1106 InterpreterRuntime::prepare_native_call),
1107 method);
1108 __ get_method(method);
1109 __ movptr(rax, Address(method, Method::native_function_offset()));
1110 __ bind(L);
1111 }
1112
1113 // pass JNIEnv
1114 #ifndef _LP64
1115 __ get_thread(thread);
1116 __ lea(t, Address(thread, JavaThread::jni_environment_offset()));
1117 __ movptr(Address(rsp, 0), t);
1118
1119 // set_last_Java_frame_before_call
1120 // It is enough that the pc()
1121 // points into the right code segment. It does not have to be the correct return pc.
1122 __ set_last_Java_frame(thread, noreg, rbp, __ pc());
1123 #else
1124 __ lea(c_rarg0, Address(r15_thread, JavaThread::jni_environment_offset()));
1125
1126 // It is enough that the pc() points into the right code
1127 // segment. It does not have to be the correct return pc.
1128 __ set_last_Java_frame(rsp, rbp, (address) __ pc());
1129 #endif // _LP64
1130
1131 // change thread state
1132 #ifdef ASSERT
1133 {
1134 Label L;
1135 __ movl(t, Address(thread, JavaThread::thread_state_offset()));
1136 __ cmpl(t, _thread_in_Java);
1137 __ jcc(Assembler::equal, L);
1138 __ stop("Wrong thread state in native stub");
1139 __ bind(L);
1140 }
1141 #endif
1142
1143 // Change state to native
1144
1145 __ movl(Address(thread, JavaThread::thread_state_offset()),
1146 _thread_in_native);
1147
1148 // Call the native method.
1149 __ call(rax);
1150 // 32: result potentially in rdx:rax or ST0
1151 // 64: result potentially in rax or xmm0
1152
1153 // Verify or restore cpu control state after JNI call
1154 __ restore_cpu_control_state_after_jni();
1155
1156 // NOTE: The order of these pushes is known to frame::interpreter_frame_result
1157 // in order to extract the result of a method call. If the order of these
1158 // pushes change or anything else is added to the stack then the code in
1159 // interpreter_frame_result must also change.
1160
1161 #ifndef _LP64
1162 // save potential result in ST(0) & rdx:rax
1163 // (if result handler is the T_FLOAT or T_DOUBLE handler, result must be in ST0 -
1164 // the check is necessary to avoid potential Intel FPU overflow problems by saving/restoring 'empty' FPU registers)
1165 // It is safe to do this push because state is _thread_in_native and return address will be found
1166 // via _last_native_pc and not via _last_jave_sp
1167
1168 // NOTE: the order of theses push(es) is known to frame::interpreter_frame_result.
1169 // If the order changes or anything else is added to the stack the code in
1170 // interpreter_frame_result will have to be changed.
1171
1172 { Label L;
1173 Label push_double;
1174 ExternalAddress float_handler(AbstractInterpreter::result_handler(T_FLOAT));
1175 ExternalAddress double_handler(AbstractInterpreter::result_handler(T_DOUBLE));
1176 __ cmpptr(Address(rbp, (frame::interpreter_frame_oop_temp_offset + 1)*wordSize),
1177 float_handler.addr());
1178 __ jcc(Assembler::equal, push_double);
1179 __ cmpptr(Address(rbp, (frame::interpreter_frame_oop_temp_offset + 1)*wordSize),
1180 double_handler.addr());
1181 __ jcc(Assembler::notEqual, L);
1182 __ bind(push_double);
1183 __ push_d(); // FP values are returned using the FPU, so push FPU contents (even if UseSSE > 0).
1184 __ bind(L);
1185 }
1186 #else
1187 __ push(dtos);
1188 #endif // _LP64
1189
1190 __ push(ltos);
1191
1192 // change thread state
1193 NOT_LP64(__ get_thread(thread));
1194 __ movl(Address(thread, JavaThread::thread_state_offset()),
1195 _thread_in_native_trans);
1196
1197 if (os::is_MP()) {
1198 if (UseMembar) {
1199 // Force this write out before the read below
1200 __ membar(Assembler::Membar_mask_bits(
1201 Assembler::LoadLoad | Assembler::LoadStore |
1202 Assembler::StoreLoad | Assembler::StoreStore));
1203 } else {
1204 // Write serialization page so VM thread can do a pseudo remote membar.
1205 // We use the current thread pointer to calculate a thread specific
1206 // offset to write to within the page. This minimizes bus traffic
1207 // due to cache line collision.
1208 __ serialize_memory(thread, rcx);
1209 }
1210 }
1211
1212 #ifndef _LP64
1213 if (AlwaysRestoreFPU) {
1214 // Make sure the control word is correct.
1215 __ fldcw(ExternalAddress(StubRoutines::addr_fpu_cntrl_wrd_std()));
1216 }
1217 #endif // _LP64
1218
1219 // check for safepoint operation in progress and/or pending suspend requests
1220 {
1221 Label Continue;
1222 Label slow_path;
1223
1224 #ifndef _LP64
1225 __ safepoint_poll(slow_path);
1226 #else
1227 __ safepoint_poll(slow_path, r15_thread, rscratch1);
1228 #endif
1229
1230 __ cmpl(Address(thread, JavaThread::suspend_flags_offset()), 0);
1231 __ jcc(Assembler::equal, Continue);
1232 __ bind(slow_path);
1233
1234 // Don't use call_VM as it will see a possible pending exception
1235 // and forward it and never return here preventing us from
1236 // clearing _last_native_pc down below. Also can't use
1237 // call_VM_leaf either as it will check to see if r13 & r14 are
1238 // preserved and correspond to the bcp/locals pointers. So we do a
1239 // runtime call by hand.
1240 //
1241 #ifndef _LP64
1242 __ push(thread);
1243 __ call(RuntimeAddress(CAST_FROM_FN_PTR(address,
1244 JavaThread::check_special_condition_for_native_trans)));
1245 __ increment(rsp, wordSize);
1246 __ get_thread(thread);
1247 #else
1248 __ mov(c_rarg0, r15_thread);
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, JavaThread::check_special_condition_for_native_trans)));
1253 __ mov(rsp, r12); // restore sp
1254 __ reinit_heapbase();
1255 #endif // _LP64
1256 __ bind(Continue);
1257 }
1258
1259 // change thread state
1260 __ movl(Address(thread, JavaThread::thread_state_offset()), _thread_in_Java);
1261
1262 // reset_last_Java_frame
1263 __ reset_last_Java_frame(thread, true);
1264
1265 if (CheckJNICalls) {
1266 // clear_pending_jni_exception_check
1267 __ movptr(Address(thread, JavaThread::pending_jni_exception_check_fn_offset()), NULL_WORD);
1268 }
1269
1270 // reset handle block
1271 __ movptr(t, Address(thread, JavaThread::active_handles_offset()));
1272 __ movl(Address(t, JNIHandleBlock::top_offset_in_bytes()), (int32_t)NULL_WORD);
1273
1274 // If result is an oop unbox and store it in frame where gc will see it
1275 // and result handler will pick it up
1276
1277 {
1278 Label no_oop, not_weak, store_result;
1279 __ lea(t, ExternalAddress(AbstractInterpreter::result_handler(T_OBJECT)));
1280 __ cmpptr(t, Address(rbp, frame::interpreter_frame_result_handler_offset*wordSize));
1281 __ jcc(Assembler::notEqual, no_oop);
1282 // retrieve result
1283 __ pop(ltos);
1284 // Unbox oop result, e.g. JNIHandles::resolve value.
1285 __ resolve_jobject(rax /* value */,
1286 thread /* thread */,
1287 t /* tmp */);
1288 __ movptr(Address(rbp, frame::interpreter_frame_oop_temp_offset*wordSize), rax);
1289 // keep stack depth as expected by pushing oop which will eventually be discarded
1290 __ push(ltos);
1291 __ bind(no_oop);
1292 }
1293
1294
1295 {
1296 Label no_reguard;
1297 __ cmpl(Address(thread, JavaThread::stack_guard_state_offset()),
1298 JavaThread::stack_guard_yellow_reserved_disabled);
1299 __ jcc(Assembler::notEqual, no_reguard);
1300
1301 __ pusha(); // XXX only save smashed registers
1302 #ifndef _LP64
1303 __ call(RuntimeAddress(CAST_FROM_FN_PTR(address, SharedRuntime::reguard_yellow_pages)));
1304 __ popa();
1305 #else
1306 __ mov(r12, rsp); // remember sp (can only use r12 if not using call_VM)
1307 __ subptr(rsp, frame::arg_reg_save_area_bytes); // windows
1308 __ andptr(rsp, -16); // align stack as required by ABI
1309 __ call(RuntimeAddress(CAST_FROM_FN_PTR(address, SharedRuntime::reguard_yellow_pages)));
1310 __ mov(rsp, r12); // restore sp
1311 __ popa(); // XXX only restore smashed registers
1312 __ reinit_heapbase();
1313 #endif // _LP64
1314
1315 __ bind(no_reguard);
1316 }
1317
1318
1319 // The method register is junk from after the thread_in_native transition
1320 // until here. Also can't call_VM until the bcp has been
1321 // restored. Need bcp for throwing exception below so get it now.
1322 __ get_method(method);
1323
1324 // restore to have legal interpreter frame, i.e., bci == 0 <=> code_base()
1325 __ movptr(rbcp, Address(method, Method::const_offset())); // get ConstMethod*
1326 __ lea(rbcp, Address(rbcp, ConstMethod::codes_offset())); // get codebase
1327
1328 // handle exceptions (exception handling will handle unlocking!)
1329 {
1330 Label L;
1331 __ cmpptr(Address(thread, Thread::pending_exception_offset()), (int32_t) NULL_WORD);
1332 __ jcc(Assembler::zero, L);
1333 // Note: At some point we may want to unify this with the code
1334 // used in call_VM_base(); i.e., we should use the
1335 // StubRoutines::forward_exception code. For now this doesn't work
1336 // here because the rsp is not correctly set at this point.
1337 __ MacroAssembler::call_VM(noreg,
1338 CAST_FROM_FN_PTR(address,
1339 InterpreterRuntime::throw_pending_exception));
1340 __ should_not_reach_here();
1341 __ bind(L);
1342 }
1343
1344 // do unlocking if necessary
1345 {
1346 Label L;
1347 __ movl(t, Address(method, Method::access_flags_offset()));
1348 __ testl(t, JVM_ACC_SYNCHRONIZED);
1349 __ jcc(Assembler::zero, L);
1350 // the code below should be shared with interpreter macro
1351 // assembler implementation
1352 {
1353 Label unlock;
1354 // BasicObjectLock will be first in list, since this is a
1355 // synchronized method. However, need to check that the object
1356 // has not been unlocked by an explicit monitorexit bytecode.
1357 const Address monitor(rbp,
1358 (intptr_t)(frame::interpreter_frame_initial_sp_offset *
1359 wordSize - (int)sizeof(BasicObjectLock)));
1360
1361 const Register regmon = NOT_LP64(rdx) LP64_ONLY(c_rarg1);
1362
1363 // monitor expect in c_rarg1 for slow unlock path
1364 __ lea(regmon, monitor); // address of first monitor
1365
1366 __ movptr(t, Address(regmon, BasicObjectLock::obj_offset_in_bytes()));
1367 __ testptr(t, t);
1368 __ jcc(Assembler::notZero, unlock);
1369
1370 // Entry already unlocked, need to throw exception
1371 __ MacroAssembler::call_VM(noreg,
1372 CAST_FROM_FN_PTR(address,
1373 InterpreterRuntime::throw_illegal_monitor_state_exception));
1374 __ should_not_reach_here();
1375
1376 __ bind(unlock);
1377 __ unlock_object(regmon);
1378 }
1379 __ bind(L);
1380 }
1381
1382 // jvmti support
1383 // Note: This must happen _after_ handling/throwing any exceptions since
1384 // the exception handler code notifies the runtime of method exits
1385 // too. If this happens before, method entry/exit notifications are
1386 // not properly paired (was bug - gri 11/22/99).
1387 __ notify_method_exit(vtos, InterpreterMacroAssembler::NotifyJVMTI);
1388
1389 // restore potential result in edx:eax, call result handler to
1390 // restore potential result in ST0 & handle result
1391
1392 __ pop(ltos);
1393 LP64_ONLY( __ pop(dtos));
1394
1395 __ movptr(t, Address(rbp,
1396 (frame::interpreter_frame_result_handler_offset) * wordSize));
1397 __ call(t);
1398
1399 // remove activation
1400 __ movptr(t, Address(rbp,
1401 frame::interpreter_frame_sender_sp_offset *
1402 wordSize)); // get sender sp
1403 __ leave(); // remove frame anchor
1404 __ pop(rdi); // get return address
1405 __ mov(rsp, t); // set sp to sender sp
1406 __ jmp(rdi);
1407
1408 if (inc_counter) {
1409 // Handle overflow of counter and compile method
1410 __ bind(invocation_counter_overflow);
1411 generate_counter_overflow(continue_after_compile);
1412 }
1413
1414 return entry_point;
1415 }
1416
1417 // Abstract method entry
1418 // Attempt to execute abstract method. Throw exception
1419 address TemplateInterpreterGenerator::generate_abstract_entry(void) {
1420
1421 address entry_point = __ pc();
1422
1423 // abstract method entry
1424
1425 // pop return address, reset last_sp to NULL
1426 __ empty_expression_stack();
1427 __ restore_bcp(); // rsi must be correct for exception handler (was destroyed)
1428 __ restore_locals(); // make sure locals pointer is correct as well (was destroyed)
1429
1430 // throw exception
1431 __ call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::throw_AbstractMethodError));
1432 // the call_VM checks for exception, so we should never return here.
1433 __ should_not_reach_here();
1434
1435 return entry_point;
1436 }
1437
1438 //
1439 // Generic interpreted method entry to (asm) interpreter
1440 //
1441 address TemplateInterpreterGenerator::generate_normal_entry(bool synchronized) {
1442 // determine code generation flags
1443 bool inc_counter = UseCompiler || CountCompiledCalls || LogTouchedMethods;
1444
1445 // ebx: Method*
1446 // rbcp: sender sp
1447 address entry_point = __ pc();
1448
1449 const Address constMethod(rbx, Method::const_offset());
1450 const Address access_flags(rbx, Method::access_flags_offset());
1451 const Address size_of_parameters(rdx,
1452 ConstMethod::size_of_parameters_offset());
1453 const Address size_of_locals(rdx, ConstMethod::size_of_locals_offset());
1454
1455
1456 // get parameter size (always needed)
1457 __ movptr(rdx, constMethod);
1458 __ load_unsigned_short(rcx, size_of_parameters);
1459
1460 // rbx: Method*
1461 // rcx: size of parameters
1462 // rbcp: sender_sp (could differ from sp+wordSize if we were called via c2i )
1463
1464 __ load_unsigned_short(rdx, size_of_locals); // get size of locals in words
1465 __ subl(rdx, rcx); // rdx = no. of additional locals
1466
1467 // YYY
1468 // __ incrementl(rdx);
1469 // __ andl(rdx, -2);
1470
1471 // see if we've got enough room on the stack for locals plus overhead.
1472 generate_stack_overflow_check();
1473
1474 // get return address
1475 __ pop(rax);
1476
1477 // compute beginning of parameters
1478 __ lea(rlocals, Address(rsp, rcx, Interpreter::stackElementScale(), -wordSize));
1479
1480 // rdx - # of additional locals
1481 // allocate space for locals
1482 // explicitly initialize locals
1483 {
1484 Label exit, loop;
1485 __ testl(rdx, rdx);
1486 __ jcc(Assembler::lessEqual, exit); // do nothing if rdx <= 0
1487 __ bind(loop);
1488 __ push((int) NULL_WORD); // initialize local variables
1489 __ decrementl(rdx); // until everything initialized
1490 __ jcc(Assembler::greater, loop);
1491 __ bind(exit);
1492 }
1493
1494 // initialize fixed part of activation frame
1495 generate_fixed_frame(false);
1496
1497 // make sure method is not native & not abstract
1498 #ifdef ASSERT
1499 __ movl(rax, access_flags);
1500 {
1501 Label L;
1502 __ testl(rax, JVM_ACC_NATIVE);
1503 __ jcc(Assembler::zero, L);
1504 __ stop("tried to execute native method as non-native");
1505 __ bind(L);
1506 }
1507 {
1508 Label L;
1509 __ testl(rax, JVM_ACC_ABSTRACT);
1510 __ jcc(Assembler::zero, L);
1511 __ stop("tried to execute abstract method in interpreter");
1512 __ bind(L);
1513 }
1514 #endif
1515
1516 // Since at this point in the method invocation the exception
1517 // handler would try to exit the monitor of synchronized methods
1518 // which hasn't been entered yet, we set the thread local variable
1519 // _do_not_unlock_if_synchronized to true. The remove_activation
1520 // will check this flag.
1521
1522 const Register thread = NOT_LP64(rax) LP64_ONLY(r15_thread);
1523 NOT_LP64(__ get_thread(thread));
1524 const Address do_not_unlock_if_synchronized(thread,
1525 in_bytes(JavaThread::do_not_unlock_if_synchronized_offset()));
1526 __ movbool(do_not_unlock_if_synchronized, true);
1527
1528 __ profile_parameters_type(rax, rcx, rdx);
1529 // increment invocation count & check for overflow
1530 Label invocation_counter_overflow;
1531 Label profile_method;
1532 Label profile_method_continue;
1533 if (inc_counter) {
1534 generate_counter_incr(&invocation_counter_overflow,
1535 &profile_method,
1536 &profile_method_continue);
1537 if (ProfileInterpreter) {
1538 __ bind(profile_method_continue);
1539 }
1540 }
1541
1542 Label continue_after_compile;
1543 __ bind(continue_after_compile);
1544
1545 // check for synchronized interpreted methods
1546 bang_stack_shadow_pages(false);
1547
1548 // reset the _do_not_unlock_if_synchronized flag
1549 NOT_LP64(__ get_thread(thread));
1550 __ movbool(do_not_unlock_if_synchronized, false);
1551
1552 // check for synchronized methods
1553 // Must happen AFTER invocation_counter check and stack overflow check,
1554 // so method is not locked if overflows.
1555 if (synchronized) {
1556 // Allocate monitor and lock method
1557 lock_method();
1558 } else {
1559 // no synchronization necessary
1560 #ifdef ASSERT
1561 {
1562 Label L;
1563 __ movl(rax, access_flags);
1564 __ testl(rax, JVM_ACC_SYNCHRONIZED);
1565 __ jcc(Assembler::zero, L);
1566 __ stop("method needs synchronization");
1567 __ bind(L);
1568 }
1569 #endif
1570 }
1571
1572 // start execution
1573 #ifdef ASSERT
1574 {
1575 Label L;
1576 const Address monitor_block_top (rbp,
1577 frame::interpreter_frame_monitor_block_top_offset * wordSize);
1578 __ movptr(rax, monitor_block_top);
1579 __ cmpptr(rax, rsp);
1580 __ jcc(Assembler::equal, L);
1581 __ stop("broken stack frame setup in interpreter");
1582 __ bind(L);
1583 }
1584 #endif
1585
1586 // jvmti support
1587 __ notify_method_entry();
1588
1589 __ dispatch_next(vtos);
1590
1591 // invocation counter overflow
1592 if (inc_counter) {
1593 if (ProfileInterpreter) {
1594 // We have decided to profile this method in the interpreter
1595 __ bind(profile_method);
1596 __ call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::profile_method));
1597 __ set_method_data_pointer_for_bcp();
1598 __ get_method(rbx);
1599 __ jmp(profile_method_continue);
1600 }
1601 // Handle overflow of counter and compile method
1602 __ bind(invocation_counter_overflow);
1603 generate_counter_overflow(continue_after_compile);
1604 }
1605
1606 return entry_point;
1607 }
1608
1609 //-----------------------------------------------------------------------------
1610 // Exceptions
1611
1612 void TemplateInterpreterGenerator::generate_throw_exception() {
1613 // Entry point in previous activation (i.e., if the caller was
1614 // interpreted)
1615 Interpreter::_rethrow_exception_entry = __ pc();
1616 // Restore sp to interpreter_frame_last_sp even though we are going
1617 // to empty the expression stack for the exception processing.
1618 __ movptr(Address(rbp, frame::interpreter_frame_last_sp_offset * wordSize), (int32_t)NULL_WORD);
1619 // rax: exception
1620 // rdx: return address/pc that threw exception
1621 __ restore_bcp(); // r13/rsi points to call/send
1622 __ restore_locals();
1623 LP64_ONLY(__ reinit_heapbase()); // restore r12 as heapbase.
1624 // Entry point for exceptions thrown within interpreter code
1625 Interpreter::_throw_exception_entry = __ pc();
1626 // expression stack is undefined here
1627 // rax: exception
1628 // r13/rsi: exception bcp
1629 __ verify_oop(rax);
1630 Register rarg = NOT_LP64(rax) LP64_ONLY(c_rarg1);
1631 LP64_ONLY(__ mov(c_rarg1, rax));
1632
1633 // expression stack must be empty before entering the VM in case of
1634 // an exception
1635 __ empty_expression_stack();
1636 // find exception handler address and preserve exception oop
1637 __ call_VM(rdx,
1638 CAST_FROM_FN_PTR(address,
1639 InterpreterRuntime::exception_handler_for_exception),
1640 rarg);
1641 // rax: exception handler entry point
1642 // rdx: preserved exception oop
1643 // r13/rsi: bcp for exception handler
1644 __ push_ptr(rdx); // push exception which is now the only value on the stack
1645 __ jmp(rax); // jump to exception handler (may be _remove_activation_entry!)
1646
1647 // If the exception is not handled in the current frame the frame is
1648 // removed and the exception is rethrown (i.e. exception
1649 // continuation is _rethrow_exception).
1650 //
1651 // Note: At this point the bci is still the bxi for the instruction
1652 // which caused the exception and the expression stack is
1653 // empty. Thus, for any VM calls at this point, GC will find a legal
1654 // oop map (with empty expression stack).
1655
1656 // In current activation
1657 // tos: exception
1658 // esi: exception bcp
1659
1660 //
1661 // JVMTI PopFrame support
1662 //
1663
1664 Interpreter::_remove_activation_preserving_args_entry = __ pc();
1665 __ empty_expression_stack();
1666 // Set the popframe_processing bit in pending_popframe_condition
1667 // indicating that we are currently handling popframe, so that
1668 // call_VMs that may happen later do not trigger new popframe
1669 // handling cycles.
1670 const Register thread = NOT_LP64(rcx) LP64_ONLY(r15_thread);
1671 NOT_LP64(__ get_thread(thread));
1672 __ movl(rdx, Address(thread, JavaThread::popframe_condition_offset()));
1673 __ orl(rdx, JavaThread::popframe_processing_bit);
1674 __ movl(Address(thread, JavaThread::popframe_condition_offset()), rdx);
1675
1676 {
1677 // Check to see whether we are returning to a deoptimized frame.
1678 // (The PopFrame call ensures that the caller of the popped frame is
1679 // either interpreted or compiled and deoptimizes it if compiled.)
1680 // In this case, we can't call dispatch_next() after the frame is
1681 // popped, but instead must save the incoming arguments and restore
1682 // them after deoptimization has occurred.
1683 //
1684 // Note that we don't compare the return PC against the
1685 // deoptimization blob's unpack entry because of the presence of
1686 // adapter frames in C2.
1687 Label caller_not_deoptimized;
1688 Register rarg = NOT_LP64(rdx) LP64_ONLY(c_rarg1);
1689 __ movptr(rarg, Address(rbp, frame::return_addr_offset * wordSize));
1690 __ super_call_VM_leaf(CAST_FROM_FN_PTR(address,
1691 InterpreterRuntime::interpreter_contains), rarg);
1692 __ testl(rax, rax);
1693 __ jcc(Assembler::notZero, caller_not_deoptimized);
1694
1695 // Compute size of arguments for saving when returning to
1696 // deoptimized caller
1697 __ get_method(rax);
1698 __ movptr(rax, Address(rax, Method::const_offset()));
1699 __ load_unsigned_short(rax, Address(rax, in_bytes(ConstMethod::
1700 size_of_parameters_offset())));
1701 __ shll(rax, Interpreter::logStackElementSize);
1702 __ restore_locals();
1703 __ subptr(rlocals, rax);
1704 __ addptr(rlocals, wordSize);
1705 // Save these arguments
1706 NOT_LP64(__ get_thread(thread));
1707 __ super_call_VM_leaf(CAST_FROM_FN_PTR(address,
1708 Deoptimization::
1709 popframe_preserve_args),
1710 thread, rax, rlocals);
1711
1712 __ remove_activation(vtos, rdx,
1713 /* throw_monitor_exception */ false,
1714 /* install_monitor_exception */ false,
1715 /* notify_jvmdi */ false);
1716
1717 // Inform deoptimization that it is responsible for restoring
1718 // these arguments
1719 NOT_LP64(__ get_thread(thread));
1720 __ movl(Address(thread, JavaThread::popframe_condition_offset()),
1721 JavaThread::popframe_force_deopt_reexecution_bit);
1722
1723 // Continue in deoptimization handler
1724 __ jmp(rdx);
1725
1726 __ bind(caller_not_deoptimized);
1727 }
1728
1729 __ remove_activation(vtos, rdx, /* rdx result (retaddr) is not used */
1730 /* throw_monitor_exception */ false,
1731 /* install_monitor_exception */ false,
1732 /* notify_jvmdi */ false);
1733
1734 // Finish with popframe handling
1735 // A previous I2C followed by a deoptimization might have moved the
1736 // outgoing arguments further up the stack. PopFrame expects the
1737 // mutations to those outgoing arguments to be preserved and other
1738 // constraints basically require this frame to look exactly as
1739 // though it had previously invoked an interpreted activation with
1740 // no space between the top of the expression stack (current
1741 // last_sp) and the top of stack. Rather than force deopt to
1742 // maintain this kind of invariant all the time we call a small
1743 // fixup routine to move the mutated arguments onto the top of our
1744 // expression stack if necessary.
1745 #ifndef _LP64
1746 __ mov(rax, rsp);
1747 __ movptr(rbx, Address(rbp, frame::interpreter_frame_last_sp_offset * wordSize));
1748 __ get_thread(thread);
1749 // PC must point into interpreter here
1750 __ set_last_Java_frame(thread, noreg, rbp, __ pc());
1751 __ super_call_VM_leaf(CAST_FROM_FN_PTR(address, InterpreterRuntime::popframe_move_outgoing_args), thread, rax, rbx);
1752 __ get_thread(thread);
1753 #else
1754 __ mov(c_rarg1, rsp);
1755 __ movptr(c_rarg2, Address(rbp, frame::interpreter_frame_last_sp_offset * wordSize));
1756 // PC must point into interpreter here
1757 __ set_last_Java_frame(noreg, rbp, __ pc());
1758 __ super_call_VM_leaf(CAST_FROM_FN_PTR(address, InterpreterRuntime::popframe_move_outgoing_args), r15_thread, c_rarg1, c_rarg2);
1759 #endif
1760 __ reset_last_Java_frame(thread, true);
1761
1762 // Restore the last_sp and null it out
1763 __ movptr(rsp, Address(rbp, frame::interpreter_frame_last_sp_offset * wordSize));
1764 __ movptr(Address(rbp, frame::interpreter_frame_last_sp_offset * wordSize), (int32_t)NULL_WORD);
1765
1766 __ restore_bcp();
1767 __ restore_locals();
1768 // The method data pointer was incremented already during
1769 // call profiling. We have to restore the mdp for the current bcp.
1770 if (ProfileInterpreter) {
1771 __ set_method_data_pointer_for_bcp();
1772 }
1773
1774 // Clear the popframe condition flag
1775 NOT_LP64(__ get_thread(thread));
1776 __ movl(Address(thread, JavaThread::popframe_condition_offset()),
1777 JavaThread::popframe_inactive);
1778
1779 #if INCLUDE_JVMTI
1780 {
1781 Label L_done;
1782 const Register local0 = rlocals;
1783
1784 __ cmpb(Address(rbcp, 0), Bytecodes::_invokestatic);
1785 __ jcc(Assembler::notEqual, L_done);
1786
1787 // The member name argument must be restored if _invokestatic is re-executed after a PopFrame call.
1788 // Detect such a case in the InterpreterRuntime function and return the member name argument, or NULL.
1789
1790 __ get_method(rdx);
1791 __ movptr(rax, Address(local0, 0));
1792 __ call_VM(rax, CAST_FROM_FN_PTR(address, InterpreterRuntime::member_name_arg_or_null), rax, rdx, rbcp);
1793
1794 __ testptr(rax, rax);
1795 __ jcc(Assembler::zero, L_done);
1796
1797 __ movptr(Address(rbx, 0), rax);
1798 __ bind(L_done);
1799 }
1800 #endif // INCLUDE_JVMTI
1801
1802 __ dispatch_next(vtos);
1803 // end of PopFrame support
1804
1805 Interpreter::_remove_activation_entry = __ pc();
1806
1807 // preserve exception over this code sequence
1808 __ pop_ptr(rax);
1809 NOT_LP64(__ get_thread(thread));
1810 __ movptr(Address(thread, JavaThread::vm_result_offset()), rax);
1811 // remove the activation (without doing throws on illegalMonitorExceptions)
1812 __ remove_activation(vtos, rdx, false, true, false);
1813 // restore exception
1814 NOT_LP64(__ get_thread(thread));
1815 __ get_vm_result(rax, thread);
1816
1817 // In between activations - previous activation type unknown yet
1818 // compute continuation point - the continuation point expects the
1819 // following registers set up:
1820 //
1821 // rax: exception
1822 // rdx: return address/pc that threw exception
1823 // rsp: expression stack of caller
1824 // rbp: ebp of caller
1825 __ push(rax); // save exception
1826 __ push(rdx); // save return address
1827 __ super_call_VM_leaf(CAST_FROM_FN_PTR(address,
1828 SharedRuntime::exception_handler_for_return_address),
1829 thread, rdx);
1830 __ mov(rbx, rax); // save exception handler
1831 __ pop(rdx); // restore return address
1832 __ pop(rax); // restore exception
1833 // Note that an "issuing PC" is actually the next PC after the call
1834 __ jmp(rbx); // jump to exception
1835 // handler of caller
1836 }
1837
1838
1839 //
1840 // JVMTI ForceEarlyReturn support
1841 //
1842 address TemplateInterpreterGenerator::generate_earlyret_entry_for(TosState state) {
1843 address entry = __ pc();
1844
1845 __ restore_bcp();
1846 __ restore_locals();
1847 __ empty_expression_stack();
1848 __ load_earlyret_value(state); // 32 bits returns value in rdx, so don't reuse
1849
1850 const Register thread = NOT_LP64(rcx) LP64_ONLY(r15_thread);
1851 NOT_LP64(__ get_thread(thread));
1852 __ movptr(rcx, Address(thread, JavaThread::jvmti_thread_state_offset()));
1853 Address cond_addr(rcx, JvmtiThreadState::earlyret_state_offset());
1854
1855 // Clear the earlyret state
1856 __ movl(cond_addr, JvmtiThreadState::earlyret_inactive);
1857
1858 __ remove_activation(state, rsi,
1859 false, /* throw_monitor_exception */
1860 false, /* install_monitor_exception */
1861 true); /* notify_jvmdi */
1862 __ jmp(rsi);
1863
1864 return entry;
1865 } // end of ForceEarlyReturn support
1866
1867
1868 //-----------------------------------------------------------------------------
1869 // Helper for vtos entry point generation
1870
1871 void TemplateInterpreterGenerator::set_vtos_entry_points(Template* t,
1872 address& bep,
1873 address& cep,
1874 address& sep,
1875 address& aep,
1876 address& iep,
1877 address& lep,
1878 address& fep,
1879 address& dep,
1880 address& qep,
1881 address& vep) {
1882 assert(t->is_valid() && t->tos_in() == vtos, "illegal template");
1883 Label L;
1884 aep = __ pc(); __ push_ptr(); __ jmp(L);
1885 qep = __ pc(); __ push_ptr(); __ jmp(L);
1886 #ifndef _LP64
1887 fep = __ pc(); __ push(ftos); __ jmp(L);
1888 dep = __ pc(); __ push(dtos); __ jmp(L);
1889 #else
1890 fep = __ pc(); __ push_f(xmm0); __ jmp(L);
1891 dep = __ pc(); __ push_d(xmm0); __ jmp(L);
1892 #endif // _LP64
1893 lep = __ pc(); __ push_l(); __ jmp(L);
1894 bep = cep = sep =
1895 iep = __ pc(); __ push_i();
1896 vep = __ pc();
1897 __ bind(L);
1898 generate_and_dispatch(t);
1899 }
1900
1901 //-----------------------------------------------------------------------------
1902
1903 // Non-product code
1904 #ifndef PRODUCT
1905
1906 address TemplateInterpreterGenerator::generate_trace_code(TosState state) {
1907 address entry = __ pc();
1908
1909 #ifndef _LP64
1910 // prepare expression stack
1911 __ pop(rcx); // pop return address so expression stack is 'pure'
1912 __ push(state); // save tosca
1913
1914 // pass tosca registers as arguments & call tracer
1915 __ call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::trace_bytecode), rcx, rax, rdx);
1916 __ mov(rcx, rax); // make sure return address is not destroyed by pop(state)
1917 __ pop(state); // restore tosca
1918
1919 // return
1920 __ jmp(rcx);
1921 #else
1922 __ push(state);
1923 __ push(c_rarg0);
1924 __ push(c_rarg1);
1925 __ push(c_rarg2);
1926 __ push(c_rarg3);
1927 __ mov(c_rarg2, rax); // Pass itos
1928 #ifdef _WIN64
1929 __ movflt(xmm3, xmm0); // Pass ftos
1930 #endif
1931 __ call_VM(noreg,
1932 CAST_FROM_FN_PTR(address, InterpreterRuntime::trace_bytecode),
1933 c_rarg1, c_rarg2, c_rarg3);
1934 __ pop(c_rarg3);
1935 __ pop(c_rarg2);
1936 __ pop(c_rarg1);
1937 __ pop(c_rarg0);
1938 __ pop(state);
1939 __ ret(0); // return from result handler
1940 #endif // _LP64
1941
1942 return entry;
1943 }
1944
1945 void TemplateInterpreterGenerator::count_bytecode() {
1946 __ incrementl(ExternalAddress((address) &BytecodeCounter::_counter_value));
1947 }
1948
1949 void TemplateInterpreterGenerator::histogram_bytecode(Template* t) {
1950 __ incrementl(ExternalAddress((address) &BytecodeHistogram::_counters[t->bytecode()]));
1951 }
1952
1953 void TemplateInterpreterGenerator::histogram_bytecode_pair(Template* t) {
1954 __ mov32(rbx, ExternalAddress((address) &BytecodePairHistogram::_index));
1955 __ shrl(rbx, BytecodePairHistogram::log2_number_of_codes);
1956 __ orl(rbx,
1957 ((int) t->bytecode()) <<
1958 BytecodePairHistogram::log2_number_of_codes);
1959 __ mov32(ExternalAddress((address) &BytecodePairHistogram::_index), rbx);
1960 __ lea(rscratch1, ExternalAddress((address) BytecodePairHistogram::_counters));
1961 __ incrementl(Address(rscratch1, rbx, Address::times_4));
1962 }
1963
1964
1965 void TemplateInterpreterGenerator::trace_bytecode(Template* t) {
1966 // Call a little run-time stub to avoid blow-up for each bytecode.
1967 // The run-time runtime saves the right registers, depending on
1968 // the tosca in-state for the given template.
1969
1970 assert(Interpreter::trace_code(t->tos_in()) != NULL,
1971 "entry must have been generated");
1972 #ifndef _LP64
1973 __ call(RuntimeAddress(Interpreter::trace_code(t->tos_in())));
1974 #else
1975 __ mov(r12, rsp); // remember sp (can only use r12 if not using call_VM)
1976 __ andptr(rsp, -16); // align stack as required by ABI
1977 __ call(RuntimeAddress(Interpreter::trace_code(t->tos_in())));
1978 __ mov(rsp, r12); // restore sp
1979 __ reinit_heapbase();
1980 #endif // _LP64
1981 }
1982
1983
1984 void TemplateInterpreterGenerator::stop_interpreter_at() {
1985 Label L;
1986 __ cmp32(ExternalAddress((address) &BytecodeCounter::_counter_value),
1987 StopInterpreterAt);
1988 __ jcc(Assembler::notEqual, L);
1989 __ int3();
1990 __ bind(L);
1991 }
1992 #endif // !PRODUCT