1 /*
2 * Copyright (c) 2003, 2021, 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 "classfile/javaClasses.hpp"
28 #include "compiler/compiler_globals.hpp"
29 #include "compiler/disassembler.hpp"
30 #include "gc/shared/barrierSetAssembler.hpp"
31 #include "interpreter/bytecodeHistogram.hpp"
32 #include "interpreter/interp_masm.hpp"
33 #include "interpreter/interpreter.hpp"
34 #include "interpreter/interpreterRuntime.hpp"
35 #include "interpreter/templateInterpreterGenerator.hpp"
36 #include "interpreter/templateTable.hpp"
37 #include "oops/arrayOop.hpp"
38 #include "oops/methodData.hpp"
39 #include "oops/method.hpp"
40 #include "oops/oop.inline.hpp"
41 #include "oops/inlineKlass.hpp"
42 #include "prims/jvmtiExport.hpp"
43 #include "prims/jvmtiThreadState.hpp"
44 #include "runtime/deoptimization.hpp"
45 #include "runtime/frame.inline.hpp"
46 #include "runtime/jniHandles.hpp"
47 #include "runtime/sharedRuntime.hpp"
48 #include "runtime/stubRoutines.hpp"
49 #include "runtime/synchronizer.hpp"
50 #include "runtime/timer.hpp"
51 #include "runtime/vframeArray.hpp"
52 #include "utilities/debug.hpp"
53 #include "utilities/macros.hpp"
54
55 #define __ Disassembler::hook<InterpreterMacroAssembler>(__FILE__, __LINE__, _masm)->
56
57 // Size of interpreter code. Increase if too small. Interpreter will
58 // fail with a guarantee ("not enough space for interpreter generation");
59 // if too small.
60 // Run with +PrintInterpreter to get the VM to print out the size.
61 // Max size with JVMTI
62 #ifdef AMD64
63 int TemplateInterpreter::InterpreterCodeSize = JVMCI_ONLY(280) NOT_JVMCI(268) * 1024;
64 #else
65 int TemplateInterpreter::InterpreterCodeSize = 224 * 1024;
66 #endif // AMD64
67
68 // Global Register Names
69 static const Register rbcp = LP64_ONLY(r13) NOT_LP64(rsi);
70 static const Register rlocals = LP64_ONLY(r14) NOT_LP64(rdi);
71
72 const int method_offset = frame::interpreter_frame_method_offset * wordSize;
73 const int bcp_offset = frame::interpreter_frame_bcp_offset * wordSize;
74 const int locals_offset = frame::interpreter_frame_locals_offset * wordSize;
75
76
77 //-----------------------------------------------------------------------------
78
79 address TemplateInterpreterGenerator::generate_StackOverflowError_handler() {
80 address entry = __ pc();
81
82 #ifdef ASSERT
83 {
84 Label L;
85 __ lea(rax, Address(rbp,
86 frame::interpreter_frame_monitor_block_top_offset *
87 wordSize));
88 __ cmpptr(rax, rsp); // rax = maximal rsp for current rbp (stack
89 // grows negative)
90 __ jcc(Assembler::aboveEqual, L); // check if frame is complete
91 __ stop ("interpreter frame not set up");
92 __ bind(L);
93 }
94 #endif // ASSERT
95 // Restore bcp under the assumption that the current frame is still
96 // interpreted
97 __ restore_bcp();
98
99 // expression stack must be empty before entering the VM if an
100 // exception happened
101 __ empty_expression_stack();
102 // throw exception
103 __ call_VM(noreg,
104 CAST_FROM_FN_PTR(address,
105 InterpreterRuntime::throw_StackOverflowError));
106 return entry;
107 }
108
109 address TemplateInterpreterGenerator::generate_ArrayIndexOutOfBounds_handler() {
110 address entry = __ pc();
111 // The expression stack must be empty before entering the VM if an
112 // exception happened.
113 __ empty_expression_stack();
114
115 // Setup parameters.
116 // ??? convention: expect aberrant index in register ebx/rbx.
117 // Pass array to create more detailed exceptions.
118 Register rarg = NOT_LP64(rax) LP64_ONLY(c_rarg1);
119 __ call_VM(noreg,
120 CAST_FROM_FN_PTR(address,
121 InterpreterRuntime::
122 throw_ArrayIndexOutOfBoundsException),
123 rarg, rbx);
124 return entry;
125 }
126
127 address TemplateInterpreterGenerator::generate_ClassCastException_handler() {
128 address entry = __ pc();
129
130 // object is at TOS
131 Register rarg = NOT_LP64(rax) LP64_ONLY(c_rarg1);
132 __ pop(rarg);
133
134 // expression stack must be empty before entering the VM if an
135 // exception happened
136 __ empty_expression_stack();
137
138 __ call_VM(noreg,
139 CAST_FROM_FN_PTR(address,
140 InterpreterRuntime::
141 throw_ClassCastException),
142 rarg);
143 return entry;
144 }
145
146 address TemplateInterpreterGenerator::generate_exception_handler_common(
147 const char* name, const char* message, bool pass_oop) {
148 assert(!pass_oop || message == NULL, "either oop or message but not both");
149 address entry = __ pc();
150
151 Register rarg = NOT_LP64(rax) LP64_ONLY(c_rarg1);
152 Register rarg2 = NOT_LP64(rbx) LP64_ONLY(c_rarg2);
153
154 if (pass_oop) {
155 // object is at TOS
156 __ pop(rarg2);
157 }
158 // expression stack must be empty before entering the VM if an
159 // exception happened
160 __ empty_expression_stack();
161 // setup parameters
162 __ lea(rarg, ExternalAddress((address)name));
163 if (pass_oop) {
164 __ call_VM(rax, CAST_FROM_FN_PTR(address,
165 InterpreterRuntime::
166 create_klass_exception),
167 rarg, rarg2);
168 } else {
169 __ lea(rarg2, ExternalAddress((address)message));
170 __ call_VM(rax,
171 CAST_FROM_FN_PTR(address, InterpreterRuntime::create_exception),
172 rarg, rarg2);
173 }
174 // throw exception
175 __ jump(ExternalAddress(Interpreter::throw_exception_entry()));
176 return entry;
177 }
178
179 address TemplateInterpreterGenerator::generate_return_entry_for(TosState state, int step, size_t index_size) {
180 address entry = __ pc();
181
182 #ifndef _LP64
183 #ifdef COMPILER2
184 // The FPU stack is clean if UseSSE >= 2 but must be cleaned in other cases
185 if ((state == ftos && UseSSE < 1) || (state == dtos && UseSSE < 2)) {
186 for (int i = 1; i < 8; i++) {
187 __ ffree(i);
188 }
189 } else if (UseSSE < 2) {
190 __ empty_FPU_stack();
191 }
192 #endif // COMPILER2
193 if ((state == ftos && UseSSE < 1) || (state == dtos && UseSSE < 2)) {
194 __ MacroAssembler::verify_FPU(1, "generate_return_entry_for compiled");
195 } else {
196 __ MacroAssembler::verify_FPU(0, "generate_return_entry_for compiled");
197 }
198
199 if (state == ftos) {
200 __ MacroAssembler::verify_FPU(UseSSE >= 1 ? 0 : 1, "generate_return_entry_for in interpreter");
201 } else if (state == dtos) {
202 __ MacroAssembler::verify_FPU(UseSSE >= 2 ? 0 : 1, "generate_return_entry_for in interpreter");
203 }
204 #endif // _LP64
205
206 // Restore stack bottom in case i2c adjusted stack
207 __ movptr(rsp, Address(rbp, frame::interpreter_frame_last_sp_offset * wordSize));
208 // and NULL it as marker that esp is now tos until next java call
209 __ movptr(Address(rbp, frame::interpreter_frame_last_sp_offset * wordSize), (int32_t)NULL_WORD);
210
211 if (state == atos && InlineTypeReturnedAsFields) {
212 __ store_inline_type_fields_to_buf(NULL);
213 }
214
215 __ restore_bcp();
216 __ restore_locals();
217
218 if (state == atos) {
219 Register mdp = rbx;
220 Register tmp = rcx;
221 __ profile_return_type(mdp, rax, tmp);
222 }
223
224 const Register cache = rbx;
225 const Register index = rcx;
226 __ get_cache_and_index_at_bcp(cache, index, 1, index_size);
227
228 const Register flags = cache;
229 __ movl(flags, Address(cache, index, Address::times_ptr, ConstantPoolCache::base_offset() + ConstantPoolCacheEntry::flags_offset()));
230 __ andl(flags, ConstantPoolCacheEntry::parameter_size_mask);
231 __ lea(rsp, Address(rsp, flags, Interpreter::stackElementScale()));
232
233 const Register java_thread = NOT_LP64(rcx) LP64_ONLY(r15_thread);
234 if (JvmtiExport::can_pop_frame()) {
235 NOT_LP64(__ get_thread(java_thread));
236 __ check_and_handle_popframe(java_thread);
237 }
238 if (JvmtiExport::can_force_early_return()) {
239 NOT_LP64(__ get_thread(java_thread));
240 __ check_and_handle_earlyret(java_thread);
241 }
242
243 __ dispatch_next(state, step);
244
245 return entry;
246 }
247
248
249 address TemplateInterpreterGenerator::generate_deopt_entry_for(TosState state, int step, address continuation) {
250 address entry = __ pc();
251
252 #ifndef _LP64
253 if (state == ftos) {
254 __ MacroAssembler::verify_FPU(UseSSE >= 1 ? 0 : 1, "generate_deopt_entry_for in interpreter");
255 } else if (state == dtos) {
256 __ MacroAssembler::verify_FPU(UseSSE >= 2 ? 0 : 1, "generate_deopt_entry_for in interpreter");
257 }
258 #endif // _LP64
259
260 // NULL last_sp until next java call
261 __ movptr(Address(rbp, frame::interpreter_frame_last_sp_offset * wordSize), (int32_t)NULL_WORD);
262 __ restore_bcp();
263 __ restore_locals();
264 const Register thread = NOT_LP64(rcx) LP64_ONLY(r15_thread);
265 NOT_LP64(__ get_thread(thread));
266 #if INCLUDE_JVMCI
267 // Check if we need to take lock at entry of synchronized method. This can
268 // only occur on method entry so emit it only for vtos with step 0.
269 if (EnableJVMCI && state == vtos && step == 0) {
270 Label L;
271 __ cmpb(Address(thread, JavaThread::pending_monitorenter_offset()), 0);
272 __ jcc(Assembler::zero, L);
273 // Clear flag.
274 __ movb(Address(thread, JavaThread::pending_monitorenter_offset()), 0);
275 // Satisfy calling convention for lock_method().
276 __ get_method(rbx);
277 // Take lock.
278 lock_method();
279 __ bind(L);
280 } else {
281 #ifdef ASSERT
282 if (EnableJVMCI) {
283 Label L;
284 __ cmpb(Address(r15_thread, JavaThread::pending_monitorenter_offset()), 0);
285 __ jcc(Assembler::zero, L);
286 __ stop("unexpected pending monitor in deopt entry");
287 __ bind(L);
288 }
289 #endif
290 }
291 #endif
292 // handle exceptions
293 {
294 Label L;
295 __ cmpptr(Address(thread, Thread::pending_exception_offset()), (int32_t) NULL_WORD);
296 __ jcc(Assembler::zero, L);
297 __ call_VM(noreg,
298 CAST_FROM_FN_PTR(address,
299 InterpreterRuntime::throw_pending_exception));
300 __ should_not_reach_here();
301 __ bind(L);
302 }
303 if (continuation == NULL) {
304 __ dispatch_next(state, step);
305 } else {
306 __ jump_to_entry(continuation);
307 }
308 return entry;
309 }
310
311 address TemplateInterpreterGenerator::generate_result_handler_for(
312 BasicType type) {
313 address entry = __ pc();
314 switch (type) {
315 case T_BOOLEAN: __ c2bool(rax); break;
316 #ifndef _LP64
317 case T_CHAR : __ andptr(rax, 0xFFFF); break;
318 #else
319 case T_CHAR : __ movzwl(rax, rax); break;
320 #endif // _LP64
321 case T_BYTE : __ sign_extend_byte(rax); break;
322 case T_SHORT : __ sign_extend_short(rax); break;
323 case T_INT : /* nothing to do */ break;
324 case T_LONG : /* nothing to do */ break;
325 case T_VOID : /* nothing to do */ break;
326 #ifndef _LP64
327 case T_DOUBLE :
328 case T_FLOAT :
329 { const Register t = InterpreterRuntime::SignatureHandlerGenerator::temp();
330 __ pop(t); // remove return address first
331 // Must return a result for interpreter or compiler. In SSE
332 // mode, results are returned in xmm0 and the FPU stack must
333 // be empty.
334 if (type == T_FLOAT && UseSSE >= 1) {
335 // Load ST0
336 __ fld_d(Address(rsp, 0));
337 // Store as float and empty fpu stack
338 __ fstp_s(Address(rsp, 0));
339 // and reload
340 __ movflt(xmm0, Address(rsp, 0));
341 } else if (type == T_DOUBLE && UseSSE >= 2 ) {
342 __ movdbl(xmm0, Address(rsp, 0));
343 } else {
344 // restore ST0
345 __ fld_d(Address(rsp, 0));
346 }
347 // and pop the temp
348 __ addptr(rsp, 2 * wordSize);
349 __ push(t); // restore return address
350 }
351 break;
352 #else
353 case T_FLOAT : /* nothing to do */ break;
354 case T_DOUBLE : /* nothing to do */ break;
355 #endif // _LP64
356
357 case T_INLINE_TYPE: // fall through (inline types are handled with oops)
358 case T_OBJECT :
359 // retrieve result from frame
360 __ movptr(rax, Address(rbp, frame::interpreter_frame_oop_temp_offset*wordSize));
361 // and verify it
362 __ verify_oop(rax);
363 break;
364 default : ShouldNotReachHere();
365 }
366 __ ret(0); // return from result handler
367 return entry;
368 }
369
370 address TemplateInterpreterGenerator::generate_safept_entry_for(
371 TosState state,
372 address runtime_entry) {
373 address entry = __ pc();
374 __ push(state);
375 __ call_VM(noreg, runtime_entry);
376 __ dispatch_via(vtos, Interpreter::_normal_table.table_for(vtos));
377 return entry;
378 }
379
380
381
382 // Helpers for commoning out cases in the various type of method entries.
383 //
384
385
386 // increment invocation count & check for overflow
387 //
388 // Note: checking for negative value instead of overflow
389 // so we have a 'sticky' overflow test
390 //
391 // rbx: method
392 // rcx: invocation counter
393 //
394 void TemplateInterpreterGenerator::generate_counter_incr(Label* overflow) {
395 Label done;
396 // Note: In tiered we increment either counters in Method* or in MDO depending if we're profiling or not.
397 int increment = InvocationCounter::count_increment;
398 Label no_mdo;
399 if (ProfileInterpreter) {
400 // Are we profiling?
401 __ movptr(rax, Address(rbx, Method::method_data_offset()));
402 __ testptr(rax, rax);
403 __ jccb(Assembler::zero, no_mdo);
404 // Increment counter in the MDO
405 const Address mdo_invocation_counter(rax, in_bytes(MethodData::invocation_counter_offset()) +
406 in_bytes(InvocationCounter::counter_offset()));
407 const Address mask(rax, in_bytes(MethodData::invoke_mask_offset()));
408 __ increment_mask_and_jump(mdo_invocation_counter, increment, mask, rcx, false, Assembler::zero, overflow);
409 __ jmp(done);
410 }
411 __ bind(no_mdo);
412 // Increment counter in MethodCounters
413 const Address invocation_counter(rax,
414 MethodCounters::invocation_counter_offset() +
415 InvocationCounter::counter_offset());
416 __ get_method_counters(rbx, rax, done);
417 const Address mask(rax, in_bytes(MethodCounters::invoke_mask_offset()));
418 __ increment_mask_and_jump(invocation_counter, increment, mask, rcx,
419 false, Assembler::zero, overflow);
420 __ bind(done);
421 }
422
423 void TemplateInterpreterGenerator::generate_counter_overflow(Label& do_continue) {
424
425 // Asm interpreter on entry
426 // r14/rdi - locals
427 // r13/rsi - bcp
428 // rbx - method
429 // rdx - cpool --- DOES NOT APPEAR TO BE TRUE
430 // rbp - interpreter frame
431
432 // On return (i.e. jump to entry_point) [ back to invocation of interpreter ]
433 // Everything as it was on entry
434 // rdx is not restored. Doesn't appear to really be set.
435
436 // InterpreterRuntime::frequency_counter_overflow takes two
437 // arguments, the first (thread) is passed by call_VM, the second
438 // indicates if the counter overflow occurs at a backwards branch
439 // (NULL bcp). We pass zero for it. The call returns the address
440 // of the verified entry point for the method or NULL if the
441 // compilation did not complete (either went background or bailed
442 // out).
443 Register rarg = NOT_LP64(rax) LP64_ONLY(c_rarg1);
444 __ movl(rarg, 0);
445 __ call_VM(noreg,
446 CAST_FROM_FN_PTR(address,
447 InterpreterRuntime::frequency_counter_overflow),
448 rarg);
449
450 __ movptr(rbx, Address(rbp, method_offset)); // restore Method*
451 // Preserve invariant that r13/r14 contain bcp/locals of sender frame
452 // and jump to the interpreted entry.
453 __ jmp(do_continue, relocInfo::none);
454 }
455
456 // See if we've got enough room on the stack for locals plus overhead below
457 // JavaThread::stack_overflow_limit(). If not, throw a StackOverflowError
458 // without going through the signal handler, i.e., reserved and yellow zones
459 // will not be made usable. The shadow zone must suffice to handle the
460 // overflow.
461 // The expression stack grows down incrementally, so the normal guard
462 // page mechanism will work for that.
463 //
464 // NOTE: Since the additional locals are also always pushed (wasn't
465 // obvious in generate_fixed_frame) so the guard should work for them
466 // too.
467 //
468 // Args:
469 // rdx: number of additional locals this frame needs (what we must check)
470 // rbx: Method*
471 //
472 // Kills:
473 // rax
474 void TemplateInterpreterGenerator::generate_stack_overflow_check(void) {
475
476 // monitor entry size: see picture of stack in frame_x86.hpp
477 const int entry_size = frame::interpreter_frame_monitor_size() * wordSize;
478
479 // total overhead size: entry_size + (saved rbp through expr stack
480 // bottom). be sure to change this if you add/subtract anything
481 // to/from the overhead area
482 const int overhead_size =
483 -(frame::interpreter_frame_initial_sp_offset * wordSize) + entry_size;
484
485 const int page_size = os::vm_page_size();
486
487 Label after_frame_check;
488
489 // see if the frame is greater than one page in size. If so,
490 // then we need to verify there is enough stack space remaining
491 // for the additional locals.
492 __ cmpl(rdx, (page_size - overhead_size) / Interpreter::stackElementSize);
493 __ jcc(Assembler::belowEqual, after_frame_check);
494
495 // compute rsp as if this were going to be the last frame on
496 // the stack before the red zone
497
498 Label after_frame_check_pop;
499 const Register thread = NOT_LP64(rsi) LP64_ONLY(r15_thread);
500 #ifndef _LP64
501 __ push(thread);
502 __ get_thread(thread);
503 #endif
504
505 const Address stack_limit(thread, JavaThread::stack_overflow_limit_offset());
506
507 // locals + overhead, in bytes
508 __ mov(rax, rdx);
509 __ shlptr(rax, Interpreter::logStackElementSize); // Convert parameter count to bytes.
510 __ addptr(rax, overhead_size);
511
512 #ifdef ASSERT
513 Label limit_okay;
514 // Verify that thread stack overflow limit is non-zero.
515 __ cmpptr(stack_limit, (int32_t)NULL_WORD);
516 __ jcc(Assembler::notEqual, limit_okay);
517 __ stop("stack overflow limit is zero");
518 __ bind(limit_okay);
519 #endif
520
521 // Add locals/frame size to stack limit.
522 __ addptr(rax, stack_limit);
523
524 // Check against the current stack bottom.
525 __ cmpptr(rsp, rax);
526
527 __ jcc(Assembler::above, after_frame_check_pop);
528 NOT_LP64(__ pop(rsi)); // get saved bcp
529
530 // Restore sender's sp as SP. This is necessary if the sender's
531 // frame is an extended compiled frame (see gen_c2i_adapter())
532 // and safer anyway in case of JSR292 adaptations.
533
534 __ pop(rax); // return address must be moved if SP is changed
535 __ mov(rsp, rbcp);
536 __ push(rax);
537
538 // Note: the restored frame is not necessarily interpreted.
539 // Use the shared runtime version of the StackOverflowError.
540 assert(StubRoutines::throw_StackOverflowError_entry() != NULL, "stub not yet generated");
541 __ jump(ExternalAddress(StubRoutines::throw_StackOverflowError_entry()));
542 // all done with frame size check
543 __ bind(after_frame_check_pop);
544 NOT_LP64(__ pop(rsi));
545
546 // all done with frame size check
547 __ bind(after_frame_check);
548 }
549
550 // Allocate monitor and lock method (asm interpreter)
551 //
552 // Args:
553 // rbx: Method*
554 // r14/rdi: locals
555 //
556 // Kills:
557 // rax
558 // c_rarg0, c_rarg1, c_rarg2, c_rarg3, ...(param regs)
559 // rscratch1, rscratch2 (scratch regs)
560 void TemplateInterpreterGenerator::lock_method() {
561 // synchronize method
562 const Address access_flags(rbx, Method::access_flags_offset());
563 const Address monitor_block_top(
564 rbp,
565 frame::interpreter_frame_monitor_block_top_offset * wordSize);
566 const int entry_size = frame::interpreter_frame_monitor_size() * wordSize;
567
568 #ifdef ASSERT
569 {
570 Label L;
571 __ movl(rax, access_flags);
572 __ testl(rax, JVM_ACC_SYNCHRONIZED);
573 __ jcc(Assembler::notZero, L);
574 __ stop("method doesn't need synchronization");
575 __ bind(L);
576 }
577 #endif // ASSERT
578
579 // get synchronization object
580 {
581 Label done;
582 __ movl(rax, access_flags);
583 __ testl(rax, JVM_ACC_STATIC);
584 // get receiver (assume this is frequent case)
585 __ movptr(rax, Address(rlocals, Interpreter::local_offset_in_bytes(0)));
586 __ jcc(Assembler::zero, done);
587 __ load_mirror(rax, rbx);
588
589 #ifdef ASSERT
590 {
591 Label L;
592 __ testptr(rax, rax);
593 __ jcc(Assembler::notZero, L);
594 __ stop("synchronization object is NULL");
595 __ bind(L);
596 }
597 #endif // ASSERT
598
599 __ bind(done);
600 }
601
602 // add space for monitor & lock
603 __ subptr(rsp, entry_size); // add space for a monitor entry
604 __ movptr(monitor_block_top, rsp); // set new monitor block top
605 // store object
606 __ movptr(Address(rsp, BasicObjectLock::obj_offset_in_bytes()), rax);
607 const Register lockreg = NOT_LP64(rdx) LP64_ONLY(c_rarg1);
608 __ movptr(lockreg, rsp); // object address
609 __ lock_object(lockreg);
610 }
611
612 // Generate a fixed interpreter frame. This is identical setup for
613 // interpreted methods and for native methods hence the shared code.
614 //
615 // Args:
616 // rax: return address
617 // rbx: Method*
618 // r14/rdi: pointer to locals
619 // r13/rsi: sender sp
620 // rdx: cp cache
621 void TemplateInterpreterGenerator::generate_fixed_frame(bool native_call) {
622 // initialize fixed part of activation frame
623 __ push(rax); // save return address
624 __ enter(); // save old & set new rbp
625 __ push(rbcp); // set sender sp
626 __ push((int)NULL_WORD); // leave last_sp as null
627 __ movptr(rbcp, Address(rbx, Method::const_offset())); // get ConstMethod*
628 __ lea(rbcp, Address(rbcp, ConstMethod::codes_offset())); // get codebase
629 __ push(rbx); // save Method*
630 // Get mirror and store it in the frame as GC root for this Method*
631 __ load_mirror(rdx, rbx);
632 __ push(rdx);
633 if (ProfileInterpreter) {
634 Label method_data_continue;
635 __ movptr(rdx, Address(rbx, in_bytes(Method::method_data_offset())));
636 __ testptr(rdx, rdx);
637 __ jcc(Assembler::zero, method_data_continue);
638 __ addptr(rdx, in_bytes(MethodData::data_offset()));
639 __ bind(method_data_continue);
640 __ push(rdx); // set the mdp (method data pointer)
641 } else {
642 __ push(0);
643 }
644
645 __ movptr(rdx, Address(rbx, Method::const_offset()));
646 __ movptr(rdx, Address(rdx, ConstMethod::constants_offset()));
647 __ movptr(rdx, Address(rdx, ConstantPool::cache_offset_in_bytes()));
648 __ push(rdx); // set constant pool cache
649 __ push(rlocals); // set locals pointer
650 if (native_call) {
651 __ push(0); // no bcp
652 } else {
653 __ push(rbcp); // set bcp
654 }
655 __ push(0); // reserve word for pointer to expression stack bottom
656 __ movptr(Address(rsp, 0), rsp); // set expression stack bottom
657 }
658
659 // End of helpers
660
661 // Method entry for java.lang.ref.Reference.get.
662 address TemplateInterpreterGenerator::generate_Reference_get_entry(void) {
663 // Code: _aload_0, _getfield, _areturn
664 // parameter size = 1
665 //
666 // The code that gets generated by this routine is split into 2 parts:
667 // 1. The "intrinsified" code performing an ON_WEAK_OOP_REF load,
668 // 2. The slow path - which is an expansion of the regular method entry.
669 //
670 // Notes:-
671 // * An intrinsic is always executed, where an ON_WEAK_OOP_REF load is performed.
672 // * We may jump to the slow path iff the receiver is null. If the
673 // Reference object is null then we no longer perform an ON_WEAK_OOP_REF load
674 // Thus we can use the regular method entry code to generate the NPE.
675 //
676 // rbx: Method*
677
678 // r13: senderSP must preserve for slow path, set SP to it on fast path
679
680 address entry = __ pc();
681
682 const int referent_offset = java_lang_ref_Reference::referent_offset();
683
684 Label slow_path;
685 // rbx: method
686
687 // Check if local 0 != NULL
688 // If the receiver is null then it is OK to jump to the slow path.
689 __ movptr(rax, Address(rsp, wordSize));
690
691 __ testptr(rax, rax);
692 __ jcc(Assembler::zero, slow_path);
693
694 // rax: local 0
695 // rbx: method (but can be used as scratch now)
696 // rdx: scratch
697 // rdi: scratch
698
699 // Preserve the sender sp in case the load barrier
700 // calls the runtime
701 NOT_LP64(__ push(rsi));
702
703 // Load the value of the referent field.
704 const Address field_address(rax, referent_offset);
705 __ load_heap_oop(rax, field_address, /*tmp1*/ rbx, /*tmp_thread*/ rdx, ON_WEAK_OOP_REF);
706
707 // _areturn
708 const Register sender_sp = NOT_LP64(rsi) LP64_ONLY(r13);
709 NOT_LP64(__ pop(rsi)); // get sender sp
710 __ pop(rdi); // get return address
711 __ mov(rsp, sender_sp); // set sp to sender sp
712 __ jmp(rdi);
713 __ ret(0);
714
715 // generate a vanilla interpreter entry as the slow path
716 __ bind(slow_path);
717 __ jump_to_entry(Interpreter::entry_for_kind(Interpreter::zerolocals));
718 return entry;
719 }
720
721 void TemplateInterpreterGenerator::bang_stack_shadow_pages(bool native_call) {
722 // Quick & dirty stack overflow checking: bang the stack & handle trap.
723 // Note that we do the banging after the frame is setup, since the exception
724 // handling code expects to find a valid interpreter frame on the stack.
725 // Doing the banging earlier fails if the caller frame is not an interpreter
726 // frame.
727 // (Also, the exception throwing code expects to unlock any synchronized
728 // method receiever, so do the banging after locking the receiver.)
729
730 // Bang each page in the shadow zone. We can't assume it's been done for
731 // an interpreter frame with greater than a page of locals, so each page
732 // needs to be checked. Only true for non-native.
733 const int page_size = os::vm_page_size();
734 const int n_shadow_pages = ((int)StackOverflow::stack_shadow_zone_size()) / page_size;
735 const int start_page = native_call ? n_shadow_pages : 1;
736 for (int pages = start_page; pages <= n_shadow_pages; pages++) {
737 __ bang_stack_with_offset(pages*page_size);
738 }
739 }
740
741 // Interpreter stub for calling a native method. (asm interpreter)
742 // This sets up a somewhat different looking stack for calling the
743 // native method than the typical interpreter frame setup.
744 address TemplateInterpreterGenerator::generate_native_entry(bool synchronized) {
745 // determine code generation flags
746 bool inc_counter = UseCompiler || CountCompiledCalls || LogTouchedMethods;
747
748 // rbx: Method*
749 // rbcp: sender sp
750
751 address entry_point = __ pc();
752
753 const Address constMethod (rbx, Method::const_offset());
754 const Address access_flags (rbx, Method::access_flags_offset());
755 const Address size_of_parameters(rcx, ConstMethod::
756 size_of_parameters_offset());
757
758
759 // get parameter size (always needed)
760 __ movptr(rcx, constMethod);
761 __ load_unsigned_short(rcx, size_of_parameters);
762
763 // native calls don't need the stack size check since they have no
764 // expression stack and the arguments are already on the stack and
765 // we only add a handful of words to the stack
766
767 // rbx: Method*
768 // rcx: size of parameters
769 // rbcp: sender sp
770 __ pop(rax); // get return address
771
772 // for natives the size of locals is zero
773
774 // compute beginning of parameters
775 __ lea(rlocals, Address(rsp, rcx, Interpreter::stackElementScale(), -wordSize));
776
777 // add 2 zero-initialized slots for native calls
778 // initialize result_handler slot
779 __ push((int) NULL_WORD);
780 // slot for oop temp
781 // (static native method holder mirror/jni oop result)
782 __ push((int) NULL_WORD);
783
784 // initialize fixed part of activation frame
785 generate_fixed_frame(true);
786
787 // make sure method is native & not abstract
788 #ifdef ASSERT
789 __ movl(rax, access_flags);
790 {
791 Label L;
792 __ testl(rax, JVM_ACC_NATIVE);
793 __ jcc(Assembler::notZero, L);
794 __ stop("tried to execute non-native method as native");
795 __ bind(L);
796 }
797 {
798 Label L;
799 __ testl(rax, JVM_ACC_ABSTRACT);
800 __ jcc(Assembler::zero, L);
801 __ stop("tried to execute abstract method in interpreter");
802 __ bind(L);
803 }
804 #endif
805
806 // Since at this point in the method invocation the exception handler
807 // would try to exit the monitor of synchronized methods which hasn't
808 // been entered yet, we set the thread local variable
809 // _do_not_unlock_if_synchronized to true. The remove_activation will
810 // check this flag.
811
812 const Register thread1 = NOT_LP64(rax) LP64_ONLY(r15_thread);
813 NOT_LP64(__ get_thread(thread1));
814 const Address do_not_unlock_if_synchronized(thread1,
815 in_bytes(JavaThread::do_not_unlock_if_synchronized_offset()));
816 __ movbool(do_not_unlock_if_synchronized, true);
817
818 // increment invocation count & check for overflow
819 Label invocation_counter_overflow;
820 if (inc_counter) {
821 generate_counter_incr(&invocation_counter_overflow);
822 }
823
824 Label continue_after_compile;
825 __ bind(continue_after_compile);
826
827 bang_stack_shadow_pages(true);
828
829 // reset the _do_not_unlock_if_synchronized flag
830 NOT_LP64(__ get_thread(thread1));
831 __ movbool(do_not_unlock_if_synchronized, false);
832
833 // check for synchronized methods
834 // Must happen AFTER invocation_counter check and stack overflow check,
835 // so method is not locked if overflows.
836 if (synchronized) {
837 lock_method();
838 } else {
839 // no synchronization necessary
840 #ifdef ASSERT
841 {
842 Label L;
843 __ movl(rax, access_flags);
844 __ testl(rax, JVM_ACC_SYNCHRONIZED);
845 __ jcc(Assembler::zero, L);
846 __ stop("method needs synchronization");
847 __ bind(L);
848 }
849 #endif
850 }
851
852 // start execution
853 #ifdef ASSERT
854 {
855 Label L;
856 const Address monitor_block_top(rbp,
857 frame::interpreter_frame_monitor_block_top_offset * wordSize);
858 __ movptr(rax, monitor_block_top);
859 __ cmpptr(rax, rsp);
860 __ jcc(Assembler::equal, L);
861 __ stop("broken stack frame setup in interpreter");
862 __ bind(L);
863 }
864 #endif
865
866 // jvmti support
867 __ notify_method_entry();
868
869 // work registers
870 const Register method = rbx;
871 const Register thread = NOT_LP64(rdi) LP64_ONLY(r15_thread);
872 const Register t = NOT_LP64(rcx) LP64_ONLY(r11);
873
874 // allocate space for parameters
875 __ get_method(method);
876 __ movptr(t, Address(method, Method::const_offset()));
877 __ load_unsigned_short(t, Address(t, ConstMethod::size_of_parameters_offset()));
878
879 #ifndef _LP64
880 __ shlptr(t, Interpreter::logStackElementSize); // Convert parameter count to bytes.
881 __ addptr(t, 2*wordSize); // allocate two more slots for JNIEnv and possible mirror
882 __ subptr(rsp, t);
883 __ andptr(rsp, -(StackAlignmentInBytes)); // gcc needs 16 byte aligned stacks to do XMM intrinsics
884 #else
885 __ shll(t, Interpreter::logStackElementSize);
886
887 __ subptr(rsp, t);
888 __ subptr(rsp, frame::arg_reg_save_area_bytes); // windows
889 __ andptr(rsp, -16); // must be 16 byte boundary (see amd64 ABI)
890 #endif // _LP64
891
892 // get signature handler
893 {
894 Label L;
895 __ movptr(t, Address(method, Method::signature_handler_offset()));
896 __ testptr(t, t);
897 __ jcc(Assembler::notZero, L);
898 __ call_VM(noreg,
899 CAST_FROM_FN_PTR(address,
900 InterpreterRuntime::prepare_native_call),
901 method);
902 __ get_method(method);
903 __ movptr(t, Address(method, Method::signature_handler_offset()));
904 __ bind(L);
905 }
906
907 // call signature handler
908 assert(InterpreterRuntime::SignatureHandlerGenerator::from() == rlocals,
909 "adjust this code");
910 assert(InterpreterRuntime::SignatureHandlerGenerator::to() == rsp,
911 "adjust this code");
912 assert(InterpreterRuntime::SignatureHandlerGenerator::temp() == NOT_LP64(t) LP64_ONLY(rscratch1),
913 "adjust this code");
914
915 // The generated handlers do not touch RBX (the method).
916 // However, large signatures cannot be cached and are generated
917 // each time here. The slow-path generator can do a GC on return,
918 // so we must reload it after the call.
919 __ call(t);
920 __ get_method(method); // slow path can do a GC, reload RBX
921
922
923 // result handler is in rax
924 // set result handler
925 __ movptr(Address(rbp,
926 (frame::interpreter_frame_result_handler_offset) * wordSize),
927 rax);
928
929 // pass mirror handle if static call
930 {
931 Label L;
932 __ movl(t, Address(method, Method::access_flags_offset()));
933 __ testl(t, JVM_ACC_STATIC);
934 __ jcc(Assembler::zero, L);
935 // get mirror
936 __ load_mirror(t, method, rax);
937 // copy mirror into activation frame
938 __ movptr(Address(rbp, frame::interpreter_frame_oop_temp_offset * wordSize),
939 t);
940 // pass handle to mirror
941 #ifndef _LP64
942 __ lea(t, Address(rbp, frame::interpreter_frame_oop_temp_offset * wordSize));
943 __ movptr(Address(rsp, wordSize), t);
944 #else
945 __ lea(c_rarg1,
946 Address(rbp, frame::interpreter_frame_oop_temp_offset * wordSize));
947 #endif // _LP64
948 __ bind(L);
949 }
950
951 // get native function entry point
952 {
953 Label L;
954 __ movptr(rax, Address(method, Method::native_function_offset()));
955 ExternalAddress unsatisfied(SharedRuntime::native_method_throw_unsatisfied_link_error_entry());
956 __ cmpptr(rax, unsatisfied.addr());
957 __ jcc(Assembler::notEqual, L);
958 __ call_VM(noreg,
959 CAST_FROM_FN_PTR(address,
960 InterpreterRuntime::prepare_native_call),
961 method);
962 __ get_method(method);
963 __ movptr(rax, Address(method, Method::native_function_offset()));
964 __ bind(L);
965 }
966
967 // pass JNIEnv
968 #ifndef _LP64
969 __ get_thread(thread);
970 __ lea(t, Address(thread, JavaThread::jni_environment_offset()));
971 __ movptr(Address(rsp, 0), t);
972
973 // set_last_Java_frame_before_call
974 // It is enough that the pc()
975 // points into the right code segment. It does not have to be the correct return pc.
976 __ set_last_Java_frame(thread, noreg, rbp, __ pc());
977 #else
978 __ lea(c_rarg0, Address(r15_thread, JavaThread::jni_environment_offset()));
979
980 // It is enough that the pc() points into the right code
981 // segment. It does not have to be the correct return pc.
982 __ set_last_Java_frame(rsp, rbp, (address) __ pc());
983 #endif // _LP64
984
985 // change thread state
986 #ifdef ASSERT
987 {
988 Label L;
989 __ movl(t, Address(thread, JavaThread::thread_state_offset()));
990 __ cmpl(t, _thread_in_Java);
991 __ jcc(Assembler::equal, L);
992 __ stop("Wrong thread state in native stub");
993 __ bind(L);
994 }
995 #endif
996
997 // Change state to native
998
999 __ movl(Address(thread, JavaThread::thread_state_offset()),
1000 _thread_in_native);
1001
1002 // Call the native method.
1003 __ call(rax);
1004 // 32: result potentially in rdx:rax or ST0
1005 // 64: result potentially in rax or xmm0
1006
1007 // Verify or restore cpu control state after JNI call
1008 __ restore_cpu_control_state_after_jni();
1009
1010 // NOTE: The order of these pushes is known to frame::interpreter_frame_result
1011 // in order to extract the result of a method call. If the order of these
1012 // pushes change or anything else is added to the stack then the code in
1013 // interpreter_frame_result must also change.
1014
1015 #ifndef _LP64
1016 // save potential result in ST(0) & rdx:rax
1017 // (if result handler is the T_FLOAT or T_DOUBLE handler, result must be in ST0 -
1018 // the check is necessary to avoid potential Intel FPU overflow problems by saving/restoring 'empty' FPU registers)
1019 // It is safe to do this push because state is _thread_in_native and return address will be found
1020 // via _last_native_pc and not via _last_jave_sp
1021
1022 // NOTE: the order of theses push(es) is known to frame::interpreter_frame_result.
1023 // If the order changes or anything else is added to the stack the code in
1024 // interpreter_frame_result will have to be changed.
1025
1026 { Label L;
1027 Label push_double;
1028 ExternalAddress float_handler(AbstractInterpreter::result_handler(T_FLOAT));
1029 ExternalAddress double_handler(AbstractInterpreter::result_handler(T_DOUBLE));
1030 __ cmpptr(Address(rbp, (frame::interpreter_frame_oop_temp_offset + 1)*wordSize),
1031 float_handler.addr());
1032 __ jcc(Assembler::equal, push_double);
1033 __ cmpptr(Address(rbp, (frame::interpreter_frame_oop_temp_offset + 1)*wordSize),
1034 double_handler.addr());
1035 __ jcc(Assembler::notEqual, L);
1036 __ bind(push_double);
1037 __ push_d(); // FP values are returned using the FPU, so push FPU contents (even if UseSSE > 0).
1038 __ bind(L);
1039 }
1040 #else
1041 __ push(dtos);
1042 #endif // _LP64
1043
1044 __ push(ltos);
1045
1046 // change thread state
1047 NOT_LP64(__ get_thread(thread));
1048 __ movl(Address(thread, JavaThread::thread_state_offset()),
1049 _thread_in_native_trans);
1050
1051 // Force this write out before the read below
1052 __ membar(Assembler::Membar_mask_bits(
1053 Assembler::LoadLoad | Assembler::LoadStore |
1054 Assembler::StoreLoad | Assembler::StoreStore));
1055
1056 #ifndef _LP64
1057 if (AlwaysRestoreFPU) {
1058 // Make sure the control word is correct.
1059 __ fldcw(ExternalAddress(StubRoutines::x86::addr_fpu_cntrl_wrd_std()));
1060 }
1061 #endif // _LP64
1062
1063 // check for safepoint operation in progress and/or pending suspend requests
1064 {
1065 Label Continue;
1066 Label slow_path;
1067
1068 __ safepoint_poll(slow_path, thread, true /* at_return */, false /* in_nmethod */);
1069
1070 __ cmpl(Address(thread, JavaThread::suspend_flags_offset()), 0);
1071 __ jcc(Assembler::equal, Continue);
1072 __ bind(slow_path);
1073
1074 // Don't use call_VM as it will see a possible pending exception
1075 // and forward it and never return here preventing us from
1076 // clearing _last_native_pc down below. Also can't use
1077 // call_VM_leaf either as it will check to see if r13 & r14 are
1078 // preserved and correspond to the bcp/locals pointers. So we do a
1079 // runtime call by hand.
1080 //
1081 #ifndef _LP64
1082 __ push(thread);
1083 __ call(RuntimeAddress(CAST_FROM_FN_PTR(address,
1084 JavaThread::check_special_condition_for_native_trans)));
1085 __ increment(rsp, wordSize);
1086 __ get_thread(thread);
1087 #else
1088 __ mov(c_rarg0, r15_thread);
1089 __ mov(r12, rsp); // remember sp (can only use r12 if not using call_VM)
1090 __ subptr(rsp, frame::arg_reg_save_area_bytes); // windows
1091 __ andptr(rsp, -16); // align stack as required by ABI
1092 __ call(RuntimeAddress(CAST_FROM_FN_PTR(address, JavaThread::check_special_condition_for_native_trans)));
1093 __ mov(rsp, r12); // restore sp
1094 __ reinit_heapbase();
1095 #endif // _LP64
1096 __ bind(Continue);
1097 }
1098
1099 // change thread state
1100 __ movl(Address(thread, JavaThread::thread_state_offset()), _thread_in_Java);
1101
1102 // reset_last_Java_frame
1103 __ reset_last_Java_frame(thread, true);
1104
1105 if (CheckJNICalls) {
1106 // clear_pending_jni_exception_check
1107 __ movptr(Address(thread, JavaThread::pending_jni_exception_check_fn_offset()), NULL_WORD);
1108 }
1109
1110 // reset handle block
1111 __ movptr(t, Address(thread, JavaThread::active_handles_offset()));
1112 __ movl(Address(t, JNIHandleBlock::top_offset_in_bytes()), (int32_t)NULL_WORD);
1113
1114 // If result is an oop unbox and store it in frame where gc will see it
1115 // and result handler will pick it up
1116
1117 {
1118 Label no_oop;
1119 __ lea(t, ExternalAddress(AbstractInterpreter::result_handler(T_OBJECT)));
1120 __ cmpptr(t, Address(rbp, frame::interpreter_frame_result_handler_offset*wordSize));
1121 __ jcc(Assembler::notEqual, no_oop);
1122 // retrieve result
1123 __ pop(ltos);
1124 // Unbox oop result, e.g. JNIHandles::resolve value.
1125 __ resolve_jobject(rax /* value */,
1126 thread /* thread */,
1127 t /* tmp */);
1128 __ movptr(Address(rbp, frame::interpreter_frame_oop_temp_offset*wordSize), rax);
1129 // keep stack depth as expected by pushing oop which will eventually be discarded
1130 __ push(ltos);
1131 __ bind(no_oop);
1132 }
1133
1134
1135 {
1136 Label no_reguard;
1137 __ cmpl(Address(thread, JavaThread::stack_guard_state_offset()),
1138 StackOverflow::stack_guard_yellow_reserved_disabled);
1139 __ jcc(Assembler::notEqual, no_reguard);
1140
1141 __ pusha(); // XXX only save smashed registers
1142 #ifndef _LP64
1143 __ call(RuntimeAddress(CAST_FROM_FN_PTR(address, SharedRuntime::reguard_yellow_pages)));
1144 __ popa();
1145 #else
1146 __ mov(r12, rsp); // remember sp (can only use r12 if not using call_VM)
1147 __ subptr(rsp, frame::arg_reg_save_area_bytes); // windows
1148 __ andptr(rsp, -16); // align stack as required by ABI
1149 __ call(RuntimeAddress(CAST_FROM_FN_PTR(address, SharedRuntime::reguard_yellow_pages)));
1150 __ mov(rsp, r12); // restore sp
1151 __ popa(); // XXX only restore smashed registers
1152 __ reinit_heapbase();
1153 #endif // _LP64
1154
1155 __ bind(no_reguard);
1156 }
1157
1158
1159 // The method register is junk from after the thread_in_native transition
1160 // until here. Also can't call_VM until the bcp has been
1161 // restored. Need bcp for throwing exception below so get it now.
1162 __ get_method(method);
1163
1164 // restore to have legal interpreter frame, i.e., bci == 0 <=> code_base()
1165 __ movptr(rbcp, Address(method, Method::const_offset())); // get ConstMethod*
1166 __ lea(rbcp, Address(rbcp, ConstMethod::codes_offset())); // get codebase
1167
1168 // handle exceptions (exception handling will handle unlocking!)
1169 {
1170 Label L;
1171 __ cmpptr(Address(thread, Thread::pending_exception_offset()), (int32_t) NULL_WORD);
1172 __ jcc(Assembler::zero, L);
1173 // Note: At some point we may want to unify this with the code
1174 // used in call_VM_base(); i.e., we should use the
1175 // StubRoutines::forward_exception code. For now this doesn't work
1176 // here because the rsp is not correctly set at this point.
1177 __ MacroAssembler::call_VM(noreg,
1178 CAST_FROM_FN_PTR(address,
1179 InterpreterRuntime::throw_pending_exception));
1180 __ should_not_reach_here();
1181 __ bind(L);
1182 }
1183
1184 // do unlocking if necessary
1185 {
1186 Label L;
1187 __ movl(t, Address(method, Method::access_flags_offset()));
1188 __ testl(t, JVM_ACC_SYNCHRONIZED);
1189 __ jcc(Assembler::zero, L);
1190 // the code below should be shared with interpreter macro
1191 // assembler implementation
1192 {
1193 Label unlock;
1194 // BasicObjectLock will be first in list, since this is a
1195 // synchronized method. However, need to check that the object
1196 // has not been unlocked by an explicit monitorexit bytecode.
1197 const Address monitor(rbp,
1198 (intptr_t)(frame::interpreter_frame_initial_sp_offset *
1199 wordSize - (int)sizeof(BasicObjectLock)));
1200
1201 const Register regmon = NOT_LP64(rdx) LP64_ONLY(c_rarg1);
1202
1203 // monitor expect in c_rarg1 for slow unlock path
1204 __ lea(regmon, monitor); // address of first monitor
1205
1206 __ movptr(t, Address(regmon, BasicObjectLock::obj_offset_in_bytes()));
1207 __ testptr(t, t);
1208 __ jcc(Assembler::notZero, unlock);
1209
1210 // Entry already unlocked, need to throw exception
1211 __ MacroAssembler::call_VM(noreg,
1212 CAST_FROM_FN_PTR(address,
1213 InterpreterRuntime::throw_illegal_monitor_state_exception));
1214 __ should_not_reach_here();
1215
1216 __ bind(unlock);
1217 __ unlock_object(regmon);
1218 }
1219 __ bind(L);
1220 }
1221
1222 // jvmti support
1223 // Note: This must happen _after_ handling/throwing any exceptions since
1224 // the exception handler code notifies the runtime of method exits
1225 // too. If this happens before, method entry/exit notifications are
1226 // not properly paired (was bug - gri 11/22/99).
1227 __ notify_method_exit(vtos, InterpreterMacroAssembler::NotifyJVMTI);
1228
1229 // restore potential result in edx:eax, call result handler to
1230 // restore potential result in ST0 & handle result
1231
1232 __ pop(ltos);
1233 LP64_ONLY( __ pop(dtos));
1234
1235 __ movptr(t, Address(rbp,
1236 (frame::interpreter_frame_result_handler_offset) * wordSize));
1237 __ call(t);
1238
1239 // remove activation
1240 __ movptr(t, Address(rbp,
1241 frame::interpreter_frame_sender_sp_offset *
1242 wordSize)); // get sender sp
1243 __ leave(); // remove frame anchor
1244 __ pop(rdi); // get return address
1245 __ mov(rsp, t); // set sp to sender sp
1246 __ jmp(rdi);
1247
1248 if (inc_counter) {
1249 // Handle overflow of counter and compile method
1250 __ bind(invocation_counter_overflow);
1251 generate_counter_overflow(continue_after_compile);
1252 }
1253
1254 return entry_point;
1255 }
1256
1257 // Abstract method entry
1258 // Attempt to execute abstract method. Throw exception
1259 address TemplateInterpreterGenerator::generate_abstract_entry(void) {
1260
1261 address entry_point = __ pc();
1262
1263 // abstract method entry
1264
1265 // pop return address, reset last_sp to NULL
1266 __ empty_expression_stack();
1267 __ restore_bcp(); // rsi must be correct for exception handler (was destroyed)
1268 __ restore_locals(); // make sure locals pointer is correct as well (was destroyed)
1269
1270 // throw exception
1271 __ call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::throw_AbstractMethodErrorWithMethod), rbx);
1272 // the call_VM checks for exception, so we should never return here.
1273 __ should_not_reach_here();
1274
1275 return entry_point;
1276 }
1277
1278 //
1279 // Generic interpreted method entry to (asm) interpreter
1280 //
1281 address TemplateInterpreterGenerator::generate_normal_entry(bool synchronized) {
1282 // determine code generation flags
1283 bool inc_counter = UseCompiler || CountCompiledCalls || LogTouchedMethods;
1284
1285 // ebx: Method*
1286 // rbcp: sender sp
1287 address entry_point = __ pc();
1288
1289 const Address constMethod(rbx, Method::const_offset());
1290 const Address access_flags(rbx, Method::access_flags_offset());
1291 const Address size_of_parameters(rdx,
1292 ConstMethod::size_of_parameters_offset());
1293 const Address size_of_locals(rdx, ConstMethod::size_of_locals_offset());
1294
1295
1296 // get parameter size (always needed)
1297 __ movptr(rdx, constMethod);
1298 __ load_unsigned_short(rcx, size_of_parameters);
1299
1300 // rbx: Method*
1301 // rcx: size of parameters
1302 // rbcp: sender_sp (could differ from sp+wordSize if we were called via c2i )
1303
1304 __ load_unsigned_short(rdx, size_of_locals); // get size of locals in words
1305 __ subl(rdx, rcx); // rdx = no. of additional locals
1306
1307 // YYY
1308 // __ incrementl(rdx);
1309 // __ andl(rdx, -2);
1310
1311 // see if we've got enough room on the stack for locals plus overhead.
1312 generate_stack_overflow_check();
1313
1314 // get return address
1315 __ pop(rax);
1316
1317 // compute beginning of parameters
1318 __ lea(rlocals, Address(rsp, rcx, Interpreter::stackElementScale(), -wordSize));
1319
1320 // rdx - # of additional locals
1321 // allocate space for locals
1322 // explicitly initialize locals
1323 {
1324 Label exit, loop;
1325 __ testl(rdx, rdx);
1326 __ jcc(Assembler::lessEqual, exit); // do nothing if rdx <= 0
1327 __ bind(loop);
1328 __ push((int) NULL_WORD); // initialize local variables
1329 __ decrementl(rdx); // until everything initialized
1330 __ jcc(Assembler::greater, loop);
1331 __ bind(exit);
1332 }
1333
1334 // initialize fixed part of activation frame
1335 generate_fixed_frame(false);
1336
1337 // make sure method is not native & not abstract
1338 #ifdef ASSERT
1339 __ movl(rax, access_flags);
1340 {
1341 Label L;
1342 __ testl(rax, JVM_ACC_NATIVE);
1343 __ jcc(Assembler::zero, L);
1344 __ stop("tried to execute native method as non-native");
1345 __ bind(L);
1346 }
1347 {
1348 Label L;
1349 __ testl(rax, JVM_ACC_ABSTRACT);
1350 __ jcc(Assembler::zero, L);
1351 __ stop("tried to execute abstract method in interpreter");
1352 __ bind(L);
1353 }
1354 #endif
1355
1356 // Since at this point in the method invocation the exception
1357 // handler would try to exit the monitor of synchronized methods
1358 // which hasn't been entered yet, we set the thread local variable
1359 // _do_not_unlock_if_synchronized to true. The remove_activation
1360 // will check this flag.
1361
1362 const Register thread = NOT_LP64(rax) LP64_ONLY(r15_thread);
1363 NOT_LP64(__ get_thread(thread));
1364 const Address do_not_unlock_if_synchronized(thread,
1365 in_bytes(JavaThread::do_not_unlock_if_synchronized_offset()));
1366 __ movbool(do_not_unlock_if_synchronized, true);
1367
1368 __ profile_parameters_type(rax, rcx, rdx);
1369 // increment invocation count & check for overflow
1370 Label invocation_counter_overflow;
1371 if (inc_counter) {
1372 generate_counter_incr(&invocation_counter_overflow);
1373 }
1374
1375 Label continue_after_compile;
1376 __ bind(continue_after_compile);
1377
1378 // check for synchronized interpreted methods
1379 bang_stack_shadow_pages(false);
1380
1381 // reset the _do_not_unlock_if_synchronized flag
1382 NOT_LP64(__ get_thread(thread));
1383 __ movbool(do_not_unlock_if_synchronized, false);
1384
1385 // check for synchronized methods
1386 // Must happen AFTER invocation_counter check and stack overflow check,
1387 // so method is not locked if overflows.
1388 if (synchronized) {
1389 // Allocate monitor and lock method
1390 lock_method();
1391 } else {
1392 // no synchronization necessary
1393 #ifdef ASSERT
1394 {
1395 Label L;
1396 __ movl(rax, access_flags);
1397 __ testl(rax, JVM_ACC_SYNCHRONIZED);
1398 __ jcc(Assembler::zero, L);
1399 __ stop("method needs synchronization");
1400 __ bind(L);
1401 }
1402 #endif
1403 }
1404
1405 // start execution
1406 #ifdef ASSERT
1407 {
1408 Label L;
1409 const Address monitor_block_top (rbp,
1410 frame::interpreter_frame_monitor_block_top_offset * wordSize);
1411 __ movptr(rax, monitor_block_top);
1412 __ cmpptr(rax, rsp);
1413 __ jcc(Assembler::equal, L);
1414 __ stop("broken stack frame setup in interpreter");
1415 __ bind(L);
1416 }
1417 #endif
1418
1419 // jvmti support
1420 __ notify_method_entry();
1421
1422 __ dispatch_next(vtos);
1423
1424 // invocation counter overflow
1425 if (inc_counter) {
1426 // Handle overflow of counter and compile method
1427 __ bind(invocation_counter_overflow);
1428 generate_counter_overflow(continue_after_compile);
1429 }
1430
1431 return entry_point;
1432 }
1433
1434 //-----------------------------------------------------------------------------
1435 // Exceptions
1436
1437 void TemplateInterpreterGenerator::generate_throw_exception() {
1438 // Entry point in previous activation (i.e., if the caller was
1439 // interpreted)
1440 Interpreter::_rethrow_exception_entry = __ pc();
1441 // Restore sp to interpreter_frame_last_sp even though we are going
1442 // to empty the expression stack for the exception processing.
1443 __ movptr(Address(rbp, frame::interpreter_frame_last_sp_offset * wordSize), (int32_t)NULL_WORD);
1444 // rax: exception
1445 // rdx: return address/pc that threw exception
1446 __ restore_bcp(); // r13/rsi points to call/send
1447 __ restore_locals();
1448 LP64_ONLY(__ reinit_heapbase()); // restore r12 as heapbase.
1449 // Entry point for exceptions thrown within interpreter code
1450 Interpreter::_throw_exception_entry = __ pc();
1451 // expression stack is undefined here
1452 // rax: exception
1453 // r13/rsi: exception bcp
1454 __ verify_oop(rax);
1455 Register rarg = NOT_LP64(rax) LP64_ONLY(c_rarg1);
1456 LP64_ONLY(__ mov(c_rarg1, rax));
1457
1458 // expression stack must be empty before entering the VM in case of
1459 // an exception
1460 __ empty_expression_stack();
1461 // find exception handler address and preserve exception oop
1462 __ call_VM(rdx,
1463 CAST_FROM_FN_PTR(address,
1464 InterpreterRuntime::exception_handler_for_exception),
1465 rarg);
1466 // rax: exception handler entry point
1467 // rdx: preserved exception oop
1468 // r13/rsi: bcp for exception handler
1469 __ push_ptr(rdx); // push exception which is now the only value on the stack
1470 __ jmp(rax); // jump to exception handler (may be _remove_activation_entry!)
1471
1472 // If the exception is not handled in the current frame the frame is
1473 // removed and the exception is rethrown (i.e. exception
1474 // continuation is _rethrow_exception).
1475 //
1476 // Note: At this point the bci is still the bxi for the instruction
1477 // which caused the exception and the expression stack is
1478 // empty. Thus, for any VM calls at this point, GC will find a legal
1479 // oop map (with empty expression stack).
1480
1481 // In current activation
1482 // tos: exception
1483 // esi: exception bcp
1484
1485 //
1486 // JVMTI PopFrame support
1487 //
1488
1489 Interpreter::_remove_activation_preserving_args_entry = __ pc();
1490 __ empty_expression_stack();
1491 // Set the popframe_processing bit in pending_popframe_condition
1492 // indicating that we are currently handling popframe, so that
1493 // call_VMs that may happen later do not trigger new popframe
1494 // handling cycles.
1495 const Register thread = NOT_LP64(rcx) LP64_ONLY(r15_thread);
1496 NOT_LP64(__ get_thread(thread));
1497 __ movl(rdx, Address(thread, JavaThread::popframe_condition_offset()));
1498 __ orl(rdx, JavaThread::popframe_processing_bit);
1499 __ movl(Address(thread, JavaThread::popframe_condition_offset()), rdx);
1500
1501 {
1502 // Check to see whether we are returning to a deoptimized frame.
1503 // (The PopFrame call ensures that the caller of the popped frame is
1504 // either interpreted or compiled and deoptimizes it if compiled.)
1505 // In this case, we can't call dispatch_next() after the frame is
1506 // popped, but instead must save the incoming arguments and restore
1507 // them after deoptimization has occurred.
1508 //
1509 // Note that we don't compare the return PC against the
1510 // deoptimization blob's unpack entry because of the presence of
1511 // adapter frames in C2.
1512 Label caller_not_deoptimized;
1513 Register rarg = NOT_LP64(rdx) LP64_ONLY(c_rarg1);
1514 __ movptr(rarg, Address(rbp, frame::return_addr_offset * wordSize));
1515 __ super_call_VM_leaf(CAST_FROM_FN_PTR(address,
1516 InterpreterRuntime::interpreter_contains), rarg);
1517 __ testl(rax, rax);
1518 __ jcc(Assembler::notZero, caller_not_deoptimized);
1519
1520 // Compute size of arguments for saving when returning to
1521 // deoptimized caller
1522 __ get_method(rax);
1523 __ movptr(rax, Address(rax, Method::const_offset()));
1524 __ load_unsigned_short(rax, Address(rax, in_bytes(ConstMethod::
1525 size_of_parameters_offset())));
1526 __ shll(rax, Interpreter::logStackElementSize);
1527 __ restore_locals();
1528 __ subptr(rlocals, rax);
1529 __ addptr(rlocals, wordSize);
1530 // Save these arguments
1531 NOT_LP64(__ get_thread(thread));
1532 __ super_call_VM_leaf(CAST_FROM_FN_PTR(address,
1533 Deoptimization::
1534 popframe_preserve_args),
1535 thread, rax, rlocals);
1536
1537 __ remove_activation(vtos, rdx,
1538 /* throw_monitor_exception */ false,
1539 /* install_monitor_exception */ false,
1540 /* notify_jvmdi */ false);
1541
1542 // Inform deoptimization that it is responsible for restoring
1543 // these arguments
1544 NOT_LP64(__ get_thread(thread));
1545 __ movl(Address(thread, JavaThread::popframe_condition_offset()),
1546 JavaThread::popframe_force_deopt_reexecution_bit);
1547
1548 // Continue in deoptimization handler
1549 __ jmp(rdx);
1550
1551 __ bind(caller_not_deoptimized);
1552 }
1553
1554 __ remove_activation(vtos, rdx, /* rdx result (retaddr) is not used */
1555 /* throw_monitor_exception */ false,
1556 /* install_monitor_exception */ false,
1557 /* notify_jvmdi */ false);
1558
1559 // Finish with popframe handling
1560 // A previous I2C followed by a deoptimization might have moved the
1561 // outgoing arguments further up the stack. PopFrame expects the
1562 // mutations to those outgoing arguments to be preserved and other
1563 // constraints basically require this frame to look exactly as
1564 // though it had previously invoked an interpreted activation with
1565 // no space between the top of the expression stack (current
1566 // last_sp) and the top of stack. Rather than force deopt to
1567 // maintain this kind of invariant all the time we call a small
1568 // fixup routine to move the mutated arguments onto the top of our
1569 // expression stack if necessary.
1570 #ifndef _LP64
1571 __ mov(rax, rsp);
1572 __ movptr(rbx, Address(rbp, frame::interpreter_frame_last_sp_offset * wordSize));
1573 __ get_thread(thread);
1574 // PC must point into interpreter here
1575 __ set_last_Java_frame(thread, noreg, rbp, __ pc());
1576 __ super_call_VM_leaf(CAST_FROM_FN_PTR(address, InterpreterRuntime::popframe_move_outgoing_args), thread, rax, rbx);
1577 __ get_thread(thread);
1578 #else
1579 __ mov(c_rarg1, rsp);
1580 __ movptr(c_rarg2, Address(rbp, frame::interpreter_frame_last_sp_offset * wordSize));
1581 // PC must point into interpreter here
1582 __ set_last_Java_frame(noreg, rbp, __ pc());
1583 __ super_call_VM_leaf(CAST_FROM_FN_PTR(address, InterpreterRuntime::popframe_move_outgoing_args), r15_thread, c_rarg1, c_rarg2);
1584 #endif
1585 __ reset_last_Java_frame(thread, true);
1586
1587 // Restore the last_sp and null it out
1588 __ movptr(rsp, Address(rbp, frame::interpreter_frame_last_sp_offset * wordSize));
1589 __ movptr(Address(rbp, frame::interpreter_frame_last_sp_offset * wordSize), (int32_t)NULL_WORD);
1590
1591 __ restore_bcp();
1592 __ restore_locals();
1593 // The method data pointer was incremented already during
1594 // call profiling. We have to restore the mdp for the current bcp.
1595 if (ProfileInterpreter) {
1596 __ set_method_data_pointer_for_bcp();
1597 }
1598
1599 // Clear the popframe condition flag
1600 NOT_LP64(__ get_thread(thread));
1601 __ movl(Address(thread, JavaThread::popframe_condition_offset()),
1602 JavaThread::popframe_inactive);
1603
1604 #if INCLUDE_JVMTI
1605 {
1606 Label L_done;
1607 const Register local0 = rlocals;
1608
1609 __ cmpb(Address(rbcp, 0), Bytecodes::_invokestatic);
1610 __ jcc(Assembler::notEqual, L_done);
1611
1612 // The member name argument must be restored if _invokestatic is re-executed after a PopFrame call.
1613 // Detect such a case in the InterpreterRuntime function and return the member name argument, or NULL.
1614
1615 __ get_method(rdx);
1616 __ movptr(rax, Address(local0, 0));
1617 __ call_VM(rax, CAST_FROM_FN_PTR(address, InterpreterRuntime::member_name_arg_or_null), rax, rdx, rbcp);
1618
1619 __ testptr(rax, rax);
1620 __ jcc(Assembler::zero, L_done);
1621
1622 __ movptr(Address(rbx, 0), rax);
1623 __ bind(L_done);
1624 }
1625 #endif // INCLUDE_JVMTI
1626
1627 __ dispatch_next(vtos);
1628 // end of PopFrame support
1629
1630 Interpreter::_remove_activation_entry = __ pc();
1631
1632 // preserve exception over this code sequence
1633 __ pop_ptr(rax);
1634 NOT_LP64(__ get_thread(thread));
1635 __ movptr(Address(thread, JavaThread::vm_result_offset()), rax);
1636 // remove the activation (without doing throws on illegalMonitorExceptions)
1637 __ remove_activation(vtos, rdx, false, true, false);
1638 // restore exception
1639 NOT_LP64(__ get_thread(thread));
1640 __ get_vm_result(rax, thread);
1641
1642 // In between activations - previous activation type unknown yet
1643 // compute continuation point - the continuation point expects the
1644 // following registers set up:
1645 //
1646 // rax: exception
1647 // rdx: return address/pc that threw exception
1648 // rsp: expression stack of caller
1649 // rbp: ebp of caller
1650 __ push(rax); // save exception
1651 __ push(rdx); // save return address
1652 __ super_call_VM_leaf(CAST_FROM_FN_PTR(address,
1653 SharedRuntime::exception_handler_for_return_address),
1654 thread, rdx);
1655 __ mov(rbx, rax); // save exception handler
1656 __ pop(rdx); // restore return address
1657 __ pop(rax); // restore exception
1658 // Note that an "issuing PC" is actually the next PC after the call
1659 __ jmp(rbx); // jump to exception
1660 // handler of caller
1661 }
1662
1663
1664 //
1665 // JVMTI ForceEarlyReturn support
1666 //
1667 address TemplateInterpreterGenerator::generate_earlyret_entry_for(TosState state) {
1668 address entry = __ pc();
1669
1670 __ restore_bcp();
1671 __ restore_locals();
1672 __ empty_expression_stack();
1673 __ load_earlyret_value(state); // 32 bits returns value in rdx, so don't reuse
1674
1675 const Register thread = NOT_LP64(rcx) LP64_ONLY(r15_thread);
1676 NOT_LP64(__ get_thread(thread));
1677 __ movptr(rcx, Address(thread, JavaThread::jvmti_thread_state_offset()));
1678 Address cond_addr(rcx, JvmtiThreadState::earlyret_state_offset());
1679
1680 // Clear the earlyret state
1681 __ movl(cond_addr, JvmtiThreadState::earlyret_inactive);
1682
1683 __ remove_activation(state, rsi,
1684 false, /* throw_monitor_exception */
1685 false, /* install_monitor_exception */
1686 true); /* notify_jvmdi */
1687 __ jmp(rsi);
1688
1689 return entry;
1690 } // end of ForceEarlyReturn support
1691
1692
1693 //-----------------------------------------------------------------------------
1694 // Helper for vtos entry point generation
1695
1696 void TemplateInterpreterGenerator::set_vtos_entry_points(Template* t,
1697 address& bep,
1698 address& cep,
1699 address& sep,
1700 address& aep,
1701 address& iep,
1702 address& lep,
1703 address& fep,
1704 address& dep,
1705 address& vep) {
1706 assert(t->is_valid() && t->tos_in() == vtos, "illegal template");
1707 Label L;
1708 #ifndef _LP64
1709 fep = __ pc(); // ftos entry point
1710 __ push(ftos);
1711 __ jmp(L);
1712 dep = __ pc(); // dtos entry point
1713 __ push(dtos);
1714 __ jmp(L);
1715 #else
1716 fep = __ pc(); // ftos entry point
1717 __ push_f(xmm0);
1718 __ jmp(L);
1719 dep = __ pc(); // dtos entry point
1720 __ push_d(xmm0);
1721 __ jmp(L);
1722 #endif // _LP64
1723 lep = __ pc(); // ltos entry point
1724 __ push_l();
1725 __ jmp(L);
1726 aep = bep = cep = sep = iep = __ pc(); // [abcsi]tos entry point
1727 __ push_i_or_ptr();
1728 vep = __ pc(); // vtos entry point
1729 __ bind(L);
1730 generate_and_dispatch(t);
1731 }
1732
1733 //-----------------------------------------------------------------------------
1734
1735 // Non-product code
1736 #ifndef PRODUCT
1737
1738 address TemplateInterpreterGenerator::generate_trace_code(TosState state) {
1739 address entry = __ pc();
1740
1741 #ifndef _LP64
1742 // prepare expression stack
1743 __ pop(rcx); // pop return address so expression stack is 'pure'
1744 __ push(state); // save tosca
1745
1746 // pass tosca registers as arguments & call tracer
1747 __ call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::trace_bytecode), rcx, rax, rdx);
1748 __ mov(rcx, rax); // make sure return address is not destroyed by pop(state)
1749 __ pop(state); // restore tosca
1750
1751 // return
1752 __ jmp(rcx);
1753 #else
1754 __ push(state);
1755 __ push(c_rarg0);
1756 __ push(c_rarg1);
1757 __ push(c_rarg2);
1758 __ push(c_rarg3);
1759 __ mov(c_rarg2, rax); // Pass itos
1760 #ifdef _WIN64
1761 __ movflt(xmm3, xmm0); // Pass ftos
1762 #endif
1763 __ call_VM(noreg,
1764 CAST_FROM_FN_PTR(address, InterpreterRuntime::trace_bytecode),
1765 c_rarg1, c_rarg2, c_rarg3);
1766 __ pop(c_rarg3);
1767 __ pop(c_rarg2);
1768 __ pop(c_rarg1);
1769 __ pop(c_rarg0);
1770 __ pop(state);
1771 __ ret(0); // return from result handler
1772 #endif // _LP64
1773
1774 return entry;
1775 }
1776
1777 void TemplateInterpreterGenerator::count_bytecode() {
1778 __ incrementl(ExternalAddress((address) &BytecodeCounter::_counter_value));
1779 }
1780
1781 void TemplateInterpreterGenerator::histogram_bytecode(Template* t) {
1782 __ incrementl(ExternalAddress((address) &BytecodeHistogram::_counters[t->bytecode()]));
1783 }
1784
1785 void TemplateInterpreterGenerator::histogram_bytecode_pair(Template* t) {
1786 __ mov32(rbx, ExternalAddress((address) &BytecodePairHistogram::_index));
1787 __ shrl(rbx, BytecodePairHistogram::log2_number_of_codes);
1788 __ orl(rbx,
1789 ((int) t->bytecode()) <<
1790 BytecodePairHistogram::log2_number_of_codes);
1791 __ mov32(ExternalAddress((address) &BytecodePairHistogram::_index), rbx);
1792 __ lea(rscratch1, ExternalAddress((address) BytecodePairHistogram::_counters));
1793 __ incrementl(Address(rscratch1, rbx, Address::times_4));
1794 }
1795
1796
1797 void TemplateInterpreterGenerator::trace_bytecode(Template* t) {
1798 // Call a little run-time stub to avoid blow-up for each bytecode.
1799 // The run-time runtime saves the right registers, depending on
1800 // the tosca in-state for the given template.
1801
1802 assert(Interpreter::trace_code(t->tos_in()) != NULL,
1803 "entry must have been generated");
1804 #ifndef _LP64
1805 __ call(RuntimeAddress(Interpreter::trace_code(t->tos_in())));
1806 #else
1807 __ mov(r12, rsp); // remember sp (can only use r12 if not using call_VM)
1808 __ andptr(rsp, -16); // align stack as required by ABI
1809 __ call(RuntimeAddress(Interpreter::trace_code(t->tos_in())));
1810 __ mov(rsp, r12); // restore sp
1811 __ reinit_heapbase();
1812 #endif // _LP64
1813 }
1814
1815
1816 void TemplateInterpreterGenerator::stop_interpreter_at() {
1817 Label L;
1818 __ cmp32(ExternalAddress((address) &BytecodeCounter::_counter_value),
1819 StopInterpreterAt);
1820 __ jcc(Assembler::notEqual, L);
1821 __ int3();
1822 __ bind(L);
1823 }
1824 #endif // !PRODUCT