1 /*
2 * Copyright (c) 2003, 2024, 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/methodCounters.hpp"
39 #include "oops/methodData.hpp"
40 #include "oops/method.hpp"
41 #include "oops/oop.inline.hpp"
42 #include "oops/inlineKlass.hpp"
43 #include "oops/resolvedIndyEntry.hpp"
44 #include "oops/resolvedMethodEntry.hpp"
45 #include "prims/jvmtiExport.hpp"
46 #include "prims/jvmtiThreadState.hpp"
47 #include "runtime/continuation.hpp"
48 #include "runtime/deoptimization.hpp"
49 #include "runtime/frame.inline.hpp"
50 #include "runtime/globals.hpp"
51 #include "runtime/jniHandles.hpp"
52 #include "runtime/sharedRuntime.hpp"
53 #include "runtime/stubRoutines.hpp"
54 #include "runtime/synchronizer.hpp"
55 #include "runtime/timer.hpp"
56 #include "runtime/vframeArray.hpp"
57 #include "utilities/checkedCast.hpp"
58 #include "utilities/debug.hpp"
59 #include "utilities/macros.hpp"
60
61 #define __ Disassembler::hook<InterpreterMacroAssembler>(__FILE__, __LINE__, _masm)->
62
63 // Size of interpreter code. Increase if too small. Interpreter will
64 // fail with a guarantee ("not enough space for interpreter generation");
65 // if too small.
66 // Run with +PrintInterpreter to get the VM to print out the size.
67 // Max size with JVMTI
68 #ifdef AMD64
69 int TemplateInterpreter::InterpreterCodeSize = JVMCI_ONLY(280) NOT_JVMCI(268) * 1024;
70 #else
71 int TemplateInterpreter::InterpreterCodeSize = 224 * 1024;
72 #endif // AMD64
73
74 // Global Register Names
75 static const Register rbcp = LP64_ONLY(r13) NOT_LP64(rsi);
76 static const Register rlocals = LP64_ONLY(r14) NOT_LP64(rdi);
77
78 const int method_offset = frame::interpreter_frame_method_offset * wordSize;
79 const int bcp_offset = frame::interpreter_frame_bcp_offset * wordSize;
80 const int locals_offset = frame::interpreter_frame_locals_offset * wordSize;
81
82
83 //-----------------------------------------------------------------------------
84
85 address TemplateInterpreterGenerator::generate_StackOverflowError_handler() {
86 address entry = __ pc();
87
88 #ifdef ASSERT
89 {
90 Label L;
91 __ movptr(rax, Address(rbp,
92 frame::interpreter_frame_monitor_block_top_offset *
93 wordSize));
94 __ lea(rax, Address(rbp, rax, Address::times_ptr));
95 __ cmpptr(rax, rsp); // rax = maximal rsp for current rbp (stack
96 // grows negative)
97 __ jcc(Assembler::aboveEqual, L); // check if frame is complete
98 __ stop ("interpreter frame not set up");
99 __ bind(L);
100 }
101 #endif // ASSERT
102 // Restore bcp under the assumption that the current frame is still
103 // interpreted
104 __ restore_bcp();
105
106 // expression stack must be empty before entering the VM if an
107 // exception happened
108 __ empty_expression_stack();
109 // throw exception
110 __ call_VM(noreg,
111 CAST_FROM_FN_PTR(address,
112 InterpreterRuntime::throw_StackOverflowError));
113 return entry;
114 }
115
116 address TemplateInterpreterGenerator::generate_ArrayIndexOutOfBounds_handler() {
117 address entry = __ pc();
118 // The expression stack must be empty before entering the VM if an
119 // exception happened.
120 __ empty_expression_stack();
121
122 // Setup parameters.
123 // ??? convention: expect aberrant index in register ebx/rbx.
124 // Pass array to create more detailed exceptions.
125 Register rarg = NOT_LP64(rax) LP64_ONLY(c_rarg1);
126 __ call_VM(noreg,
127 CAST_FROM_FN_PTR(address,
128 InterpreterRuntime::
129 throw_ArrayIndexOutOfBoundsException),
130 rarg, rbx);
131 return entry;
132 }
133
134 address TemplateInterpreterGenerator::generate_ClassCastException_handler() {
135 address entry = __ pc();
136
137 // object is at TOS
138 Register rarg = NOT_LP64(rax) LP64_ONLY(c_rarg1);
139 __ pop(rarg);
140
141 // expression stack must be empty before entering the VM if an
142 // exception happened
143 __ empty_expression_stack();
144
145 __ call_VM(noreg,
146 CAST_FROM_FN_PTR(address,
147 InterpreterRuntime::
148 throw_ClassCastException),
149 rarg);
150 return entry;
151 }
152
153 address TemplateInterpreterGenerator::generate_exception_handler_common(
154 const char* name, const char* message, bool pass_oop) {
155 assert(!pass_oop || message == nullptr, "either oop or message but not both");
156 address entry = __ pc();
157
158 Register rarg = NOT_LP64(rax) LP64_ONLY(c_rarg1);
159 Register rarg2 = NOT_LP64(rbx) LP64_ONLY(c_rarg2);
160
161 if (pass_oop) {
162 // object is at TOS
163 __ pop(rarg2);
164 }
165 // expression stack must be empty before entering the VM if an
166 // exception happened
167 __ empty_expression_stack();
168 // setup parameters
169 __ lea(rarg, ExternalAddress((address)name));
170 if (pass_oop) {
171 __ call_VM(rax, CAST_FROM_FN_PTR(address,
172 InterpreterRuntime::
173 create_klass_exception),
174 rarg, rarg2);
175 } else {
176 __ lea(rarg2, ExternalAddress((address)message));
177 __ call_VM(rax,
178 CAST_FROM_FN_PTR(address, InterpreterRuntime::create_exception),
179 rarg, rarg2);
180 }
181 // throw exception
182 __ jump(RuntimeAddress(Interpreter::throw_exception_entry()));
183 return entry;
184 }
185
186 address TemplateInterpreterGenerator::generate_return_entry_for(TosState state, int step, size_t index_size) {
187 address entry = __ pc();
188
189 #ifndef _LP64
190 #ifdef COMPILER2
191 // The FPU stack is clean if UseSSE >= 2 but must be cleaned in other cases
192 if ((state == ftos && UseSSE < 1) || (state == dtos && UseSSE < 2)) {
193 for (int i = 1; i < 8; i++) {
194 __ ffree(i);
195 }
196 } else if (UseSSE < 2) {
197 __ empty_FPU_stack();
198 }
199 #endif // COMPILER2
200 if ((state == ftos && UseSSE < 1) || (state == dtos && UseSSE < 2)) {
201 __ MacroAssembler::verify_FPU(1, "generate_return_entry_for compiled");
202 } else {
203 __ MacroAssembler::verify_FPU(0, "generate_return_entry_for compiled");
204 }
205
206 if (state == ftos) {
207 __ MacroAssembler::verify_FPU(UseSSE >= 1 ? 0 : 1, "generate_return_entry_for in interpreter");
208 } else if (state == dtos) {
209 __ MacroAssembler::verify_FPU(UseSSE >= 2 ? 0 : 1, "generate_return_entry_for in interpreter");
210 }
211 #endif // _LP64
212
213 // Restore stack bottom in case i2c adjusted stack
214 __ movptr(rscratch1, Address(rbp, frame::interpreter_frame_last_sp_offset * wordSize));
215 __ lea(rsp, Address(rbp, rscratch1, Address::times_ptr));
216 // and null it as marker that esp is now tos until next java call
217 __ movptr(Address(rbp, frame::interpreter_frame_last_sp_offset * wordSize), NULL_WORD);
218
219 if (state == atos && InlineTypeReturnedAsFields) {
220 __ store_inline_type_fields_to_buf(NULL);
221 }
222
223 __ restore_bcp();
224 __ restore_locals();
225
226 if (state == atos) {
227 Register mdp = rbx;
228 Register tmp = rcx;
229 __ profile_return_type(mdp, rax, tmp);
230 }
231
232 const Register cache = rbx;
233 const Register index = rcx;
234 if (index_size == sizeof(u4)) {
235 __ load_resolved_indy_entry(cache, index);
236 __ load_unsigned_short(cache, Address(cache, in_bytes(ResolvedIndyEntry::num_parameters_offset())));
237 __ lea(rsp, Address(rsp, cache, Interpreter::stackElementScale()));
238 } else {
239 assert(index_size == sizeof(u2), "Can only be u2");
240 __ load_method_entry(cache, index);
241 __ load_unsigned_short(cache, Address(cache, in_bytes(ResolvedMethodEntry::num_parameters_offset())));
242 __ lea(rsp, Address(rsp, cache, Interpreter::stackElementScale()));
243 }
244
245 const Register java_thread = NOT_LP64(rcx) LP64_ONLY(r15_thread);
246 if (JvmtiExport::can_pop_frame()) {
247 NOT_LP64(__ get_thread(java_thread));
248 __ check_and_handle_popframe(java_thread);
249 }
250 if (JvmtiExport::can_force_early_return()) {
251 NOT_LP64(__ get_thread(java_thread));
252 __ check_and_handle_earlyret(java_thread);
253 }
254
255 __ dispatch_next(state, step);
256
257 return entry;
258 }
259
260
261 address TemplateInterpreterGenerator::generate_deopt_entry_for(TosState state, int step, address continuation) {
262 address entry = __ pc();
263
264 #ifndef _LP64
265 if (state == ftos) {
266 __ MacroAssembler::verify_FPU(UseSSE >= 1 ? 0 : 1, "generate_deopt_entry_for in interpreter");
267 } else if (state == dtos) {
268 __ MacroAssembler::verify_FPU(UseSSE >= 2 ? 0 : 1, "generate_deopt_entry_for in interpreter");
269 }
270 #endif // _LP64
271
272 // null last_sp until next java call
273 __ movptr(Address(rbp, frame::interpreter_frame_last_sp_offset * wordSize), NULL_WORD);
274 __ restore_bcp();
275 __ restore_locals();
276 const Register thread = NOT_LP64(rcx) LP64_ONLY(r15_thread);
277 NOT_LP64(__ get_thread(thread));
278 #if INCLUDE_JVMCI
279 // Check if we need to take lock at entry of synchronized method. This can
280 // only occur on method entry so emit it only for vtos with step 0.
281 if (EnableJVMCI && state == vtos && step == 0) {
282 Label L;
283 __ cmpb(Address(thread, JavaThread::pending_monitorenter_offset()), 0);
284 __ jcc(Assembler::zero, L);
285 // Clear flag.
286 __ movb(Address(thread, JavaThread::pending_monitorenter_offset()), 0);
287 // Satisfy calling convention for lock_method().
288 __ get_method(rbx);
289 // Take lock.
290 lock_method();
291 __ bind(L);
292 } else {
293 #ifdef ASSERT
294 if (EnableJVMCI) {
295 Label L;
296 __ cmpb(Address(r15_thread, JavaThread::pending_monitorenter_offset()), 0);
297 __ jcc(Assembler::zero, L);
298 __ stop("unexpected pending monitor in deopt entry");
299 __ bind(L);
300 }
301 #endif
302 }
303 #endif
304 // handle exceptions
305 {
306 Label L;
307 __ cmpptr(Address(thread, Thread::pending_exception_offset()), NULL_WORD);
308 __ jcc(Assembler::zero, L);
309 __ call_VM(noreg,
310 CAST_FROM_FN_PTR(address,
311 InterpreterRuntime::throw_pending_exception));
312 __ should_not_reach_here();
313 __ bind(L);
314 }
315 if (continuation == nullptr) {
316 __ dispatch_next(state, step);
317 } else {
318 __ jump_to_entry(continuation);
319 }
320 return entry;
321 }
322
323 address TemplateInterpreterGenerator::generate_result_handler_for(
324 BasicType type) {
325 address entry = __ pc();
326 switch (type) {
327 case T_BOOLEAN: __ c2bool(rax); break;
328 #ifndef _LP64
329 case T_CHAR : __ andptr(rax, 0xFFFF); break;
330 #else
331 case T_CHAR : __ movzwl(rax, rax); break;
332 #endif // _LP64
333 case T_BYTE : __ sign_extend_byte(rax); break;
334 case T_SHORT : __ sign_extend_short(rax); break;
335 case T_INT : /* nothing to do */ break;
336 case T_LONG : /* nothing to do */ break;
337 case T_VOID : /* nothing to do */ break;
338 #ifndef _LP64
339 case T_DOUBLE :
340 case T_FLOAT :
341 { const Register t = InterpreterRuntime::SignatureHandlerGenerator::temp();
342 __ pop(t); // remove return address first
343 // Must return a result for interpreter or compiler. In SSE
344 // mode, results are returned in xmm0 and the FPU stack must
345 // be empty.
346 if (type == T_FLOAT && UseSSE >= 1) {
347 // Load ST0
348 __ fld_d(Address(rsp, 0));
349 // Store as float and empty fpu stack
350 __ fstp_s(Address(rsp, 0));
351 // and reload
352 __ movflt(xmm0, Address(rsp, 0));
353 } else if (type == T_DOUBLE && UseSSE >= 2 ) {
354 __ movdbl(xmm0, Address(rsp, 0));
355 } else {
356 // restore ST0
357 __ fld_d(Address(rsp, 0));
358 }
359 // and pop the temp
360 __ addptr(rsp, 2 * wordSize);
361 __ push(t); // restore return address
362 }
363 break;
364 #else
365 case T_FLOAT : /* nothing to do */ break;
366 case T_DOUBLE : /* nothing to do */ break;
367 #endif // _LP64
368
369 case T_OBJECT :
370 // retrieve result from frame
371 __ movptr(rax, Address(rbp, frame::interpreter_frame_oop_temp_offset*wordSize));
372 // and verify it
373 __ verify_oop(rax);
374 break;
375 default : ShouldNotReachHere();
376 }
377 __ ret(0); // return from result handler
378 return entry;
379 }
380
381 address TemplateInterpreterGenerator::generate_safept_entry_for(
382 TosState state,
383 address runtime_entry) {
384 address entry = __ pc();
385
386 __ push(state);
387 __ push_cont_fastpath();
388 __ call_VM(noreg, runtime_entry);
389 __ pop_cont_fastpath();
390
391 __ dispatch_via(vtos, Interpreter::_normal_table.table_for(vtos));
392 return entry;
393 }
394
395
396
397 // Helpers for commoning out cases in the various type of method entries.
398 //
399
400
401 // increment invocation count & check for overflow
402 //
403 // Note: checking for negative value instead of overflow
404 // so we have a 'sticky' overflow test
405 //
406 // rbx: method
407 // rcx: invocation counter
408 //
409 void TemplateInterpreterGenerator::generate_counter_incr(Label* overflow) {
410 Label done;
411 // Note: In tiered we increment either counters in Method* or in MDO depending if we're profiling or not.
412 Label no_mdo;
413 if (ProfileInterpreter) {
414 // Are we profiling?
415 __ movptr(rax, Address(rbx, Method::method_data_offset()));
416 __ testptr(rax, rax);
417 __ jccb(Assembler::zero, no_mdo);
418 // Increment counter in the MDO
419 const Address mdo_invocation_counter(rax, in_bytes(MethodData::invocation_counter_offset()) +
420 in_bytes(InvocationCounter::counter_offset()));
421 const Address mask(rax, in_bytes(MethodData::invoke_mask_offset()));
422 __ increment_mask_and_jump(mdo_invocation_counter, mask, rcx, overflow);
423 __ jmp(done);
424 }
425 __ bind(no_mdo);
426 // Increment counter in MethodCounters
427 const Address invocation_counter(rax,
428 MethodCounters::invocation_counter_offset() +
429 InvocationCounter::counter_offset());
430 __ get_method_counters(rbx, rax, done);
431 const Address mask(rax, in_bytes(MethodCounters::invoke_mask_offset()));
432 __ increment_mask_and_jump(invocation_counter, mask, rcx, overflow);
433 __ bind(done);
434 }
435
436 void TemplateInterpreterGenerator::generate_counter_overflow(Label& do_continue) {
437
438 // Asm interpreter on entry
439 // r14/rdi - locals
440 // r13/rsi - bcp
441 // rbx - method
442 // rdx - cpool --- DOES NOT APPEAR TO BE TRUE
443 // rbp - interpreter frame
444
445 // On return (i.e. jump to entry_point) [ back to invocation of interpreter ]
446 // Everything as it was on entry
447 // rdx is not restored. Doesn't appear to really be set.
448
449 // InterpreterRuntime::frequency_counter_overflow takes two
450 // arguments, the first (thread) is passed by call_VM, the second
451 // indicates if the counter overflow occurs at a backwards branch
452 // (null bcp). We pass zero for it. The call returns the address
453 // of the verified entry point for the method or null if the
454 // compilation did not complete (either went background or bailed
455 // out).
456 Register rarg = NOT_LP64(rax) LP64_ONLY(c_rarg1);
457 __ movl(rarg, 0);
458 __ call_VM(noreg,
459 CAST_FROM_FN_PTR(address,
460 InterpreterRuntime::frequency_counter_overflow),
461 rarg);
462
463 __ movptr(rbx, Address(rbp, method_offset)); // restore Method*
464 // Preserve invariant that r13/r14 contain bcp/locals of sender frame
465 // and jump to the interpreted entry.
466 __ jmp(do_continue, relocInfo::none);
467 }
468
469 // See if we've got enough room on the stack for locals plus overhead below
470 // JavaThread::stack_overflow_limit(). If not, throw a StackOverflowError
471 // without going through the signal handler, i.e., reserved and yellow zones
472 // will not be made usable. The shadow zone must suffice to handle the
473 // overflow.
474 // The expression stack grows down incrementally, so the normal guard
475 // page mechanism will work for that.
476 //
477 // NOTE: Since the additional locals are also always pushed (wasn't
478 // obvious in generate_fixed_frame) so the guard should work for them
479 // too.
480 //
481 // Args:
482 // rdx: number of additional locals this frame needs (what we must check)
483 // rbx: Method*
484 //
485 // Kills:
486 // rax
487 void TemplateInterpreterGenerator::generate_stack_overflow_check(void) {
488
489 // monitor entry size: see picture of stack in frame_x86.hpp
490 const int entry_size = frame::interpreter_frame_monitor_size_in_bytes();
491
492 // total overhead size: entry_size + (saved rbp through expr stack
493 // bottom). be sure to change this if you add/subtract anything
494 // to/from the overhead area
495 const int overhead_size =
496 -(frame::interpreter_frame_initial_sp_offset * wordSize) + entry_size;
497
498 const int page_size = (int)os::vm_page_size();
499
500 Label after_frame_check;
501
502 // see if the frame is greater than one page in size. If so,
503 // then we need to verify there is enough stack space remaining
504 // for the additional locals.
505 __ cmpl(rdx, (page_size - overhead_size) / Interpreter::stackElementSize);
506 __ jcc(Assembler::belowEqual, after_frame_check);
507
508 // compute rsp as if this were going to be the last frame on
509 // the stack before the red zone
510
511 Label after_frame_check_pop;
512 const Register thread = NOT_LP64(rsi) LP64_ONLY(r15_thread);
513 #ifndef _LP64
514 __ push(thread);
515 __ get_thread(thread);
516 #endif
517
518 const Address stack_limit(thread, JavaThread::stack_overflow_limit_offset());
519
520 // locals + overhead, in bytes
521 __ mov(rax, rdx);
522 __ shlptr(rax, Interpreter::logStackElementSize); // Convert parameter count to bytes.
523 __ addptr(rax, overhead_size);
524
525 #ifdef ASSERT
526 Label limit_okay;
527 // Verify that thread stack overflow limit is non-zero.
528 __ cmpptr(stack_limit, NULL_WORD);
529 __ jcc(Assembler::notEqual, limit_okay);
530 __ stop("stack overflow limit is zero");
531 __ bind(limit_okay);
532 #endif
533
534 // Add locals/frame size to stack limit.
535 __ addptr(rax, stack_limit);
536
537 // Check against the current stack bottom.
538 __ cmpptr(rsp, rax);
539
540 __ jcc(Assembler::above, after_frame_check_pop);
541 NOT_LP64(__ pop(rsi)); // get saved bcp
542
543 // Restore sender's sp as SP. This is necessary if the sender's
544 // frame is an extended compiled frame (see gen_c2i_adapter())
545 // and safer anyway in case of JSR292 adaptations.
546
547 __ pop(rax); // return address must be moved if SP is changed
548 __ mov(rsp, rbcp);
549 __ push(rax);
550
551 // Note: the restored frame is not necessarily interpreted.
552 // Use the shared runtime version of the StackOverflowError.
553 assert(SharedRuntime::throw_StackOverflowError_entry() != nullptr, "stub not yet generated");
554 __ jump(RuntimeAddress(SharedRuntime::throw_StackOverflowError_entry()));
555 // all done with frame size check
556 __ bind(after_frame_check_pop);
557 NOT_LP64(__ pop(rsi));
558
559 // all done with frame size check
560 __ bind(after_frame_check);
561 }
562
563 // Allocate monitor and lock method (asm interpreter)
564 //
565 // Args:
566 // rbx: Method*
567 // r14/rdi: locals
568 //
569 // Kills:
570 // rax
571 // c_rarg0, c_rarg1, c_rarg2, c_rarg3, ...(param regs)
572 // rscratch1, rscratch2 (scratch regs)
573 void TemplateInterpreterGenerator::lock_method() {
574 // synchronize method
575 const Address access_flags(rbx, Method::access_flags_offset());
576 const Address monitor_block_top(
577 rbp,
578 frame::interpreter_frame_monitor_block_top_offset * wordSize);
579 const int entry_size = frame::interpreter_frame_monitor_size_in_bytes();
580
581 #ifdef ASSERT
582 {
583 Label L;
584 __ movl(rax, access_flags);
585 __ testl(rax, JVM_ACC_SYNCHRONIZED);
586 __ jcc(Assembler::notZero, L);
587 __ stop("method doesn't need synchronization");
588 __ bind(L);
589 }
590 #endif // ASSERT
591
592 // get synchronization object
593 {
594 Label done;
595 __ movl(rax, access_flags);
596 __ testl(rax, JVM_ACC_STATIC);
597 // get receiver (assume this is frequent case)
598 __ movptr(rax, Address(rlocals, Interpreter::local_offset_in_bytes(0)));
599 __ jcc(Assembler::zero, done);
600 __ load_mirror(rax, rbx, rscratch2);
601
602 #ifdef ASSERT
603 {
604 Label L;
605 __ testptr(rax, rax);
606 __ jcc(Assembler::notZero, L);
607 __ stop("synchronization object is null");
608 __ bind(L);
609 }
610 #endif // ASSERT
611
612 __ bind(done);
613 }
614
615 // add space for monitor & lock
616 __ subptr(rsp, entry_size); // add space for a monitor entry
617 __ subptr(monitor_block_top, entry_size / wordSize); // set new monitor block top
618 // store object
619 __ movptr(Address(rsp, BasicObjectLock::obj_offset()), rax);
620 const Register lockreg = NOT_LP64(rdx) LP64_ONLY(c_rarg1);
621 __ movptr(lockreg, rsp); // object address
622 __ lock_object(lockreg);
623 }
624
625 // Generate a fixed interpreter frame. This is identical setup for
626 // interpreted methods and for native methods hence the shared code.
627 //
628 // Args:
629 // rax: return address
630 // rbx: Method*
631 // r14/rdi: pointer to locals
632 // r13/rsi: sender sp
633 // rdx: cp cache
634 void TemplateInterpreterGenerator::generate_fixed_frame(bool native_call) {
635 // initialize fixed part of activation frame
636 __ push(rax); // save return address
637 __ enter(); // save old & set new rbp
638 __ push(rbcp); // set sender sp
639 __ push(NULL_WORD); // leave last_sp as null
640 __ movptr(rbcp, Address(rbx, Method::const_offset())); // get ConstMethod*
641 __ lea(rbcp, Address(rbcp, ConstMethod::codes_offset())); // get codebase
642 __ push(rbx); // save Method*
643 // Get mirror and store it in the frame as GC root for this Method*
644 __ load_mirror(rdx, rbx, rscratch2);
645 __ push(rdx);
646 if (ProfileInterpreter) {
647 Label method_data_continue;
648 __ movptr(rdx, Address(rbx, in_bytes(Method::method_data_offset())));
649 __ testptr(rdx, rdx);
650 __ jcc(Assembler::zero, method_data_continue);
651 __ addptr(rdx, in_bytes(MethodData::data_offset()));
652 __ bind(method_data_continue);
653 __ push(rdx); // set the mdp (method data pointer)
654 } else {
655 __ push(0);
656 }
657
658 __ movptr(rdx, Address(rbx, Method::const_offset()));
659 __ movptr(rdx, Address(rdx, ConstMethod::constants_offset()));
660 __ movptr(rdx, Address(rdx, ConstantPool::cache_offset()));
661 __ push(rdx); // set constant pool cache
662
663 __ movptr(rax, rlocals);
664 __ subptr(rax, rbp);
665 __ shrptr(rax, Interpreter::logStackElementSize); // rax = rlocals - fp();
666 __ push(rax); // set relativized rlocals, see frame::interpreter_frame_locals()
667
668 if (native_call) {
669 __ push(0); // no bcp
670 } else {
671 __ push(rbcp); // set bcp
672 }
673 // initialize relativized pointer to expression stack bottom
674 __ push(frame::interpreter_frame_initial_sp_offset);
675 }
676
677 // End of helpers
678
679 // Method entry for java.lang.ref.Reference.get.
680 address TemplateInterpreterGenerator::generate_Reference_get_entry(void) {
681 // Code: _aload_0, _getfield, _areturn
682 // parameter size = 1
683 //
684 // The code that gets generated by this routine is split into 2 parts:
685 // 1. The "intrinsified" code performing an ON_WEAK_OOP_REF load,
686 // 2. The slow path - which is an expansion of the regular method entry.
687 //
688 // Notes:-
689 // * An intrinsic is always executed, where an ON_WEAK_OOP_REF load is performed.
690 // * We may jump to the slow path iff the receiver is null. If the
691 // Reference object is null then we no longer perform an ON_WEAK_OOP_REF load
692 // Thus we can use the regular method entry code to generate the NPE.
693 //
694 // rbx: Method*
695
696 // r13: senderSP must preserve for slow path, set SP to it on fast path
697
698 address entry = __ pc();
699
700 const int referent_offset = java_lang_ref_Reference::referent_offset();
701
702 Label slow_path;
703 // rbx: method
704
705 // Check if local 0 != null
706 // If the receiver is null then it is OK to jump to the slow path.
707 __ movptr(rax, Address(rsp, wordSize));
708
709 __ testptr(rax, rax);
710 __ jcc(Assembler::zero, slow_path);
711
712 // rax: local 0
713 // rbx: method (but can be used as scratch now)
714 // rdx: scratch
715 // rdi: scratch
716
717 // Preserve the sender sp in case the load barrier
718 // calls the runtime
719 NOT_LP64(__ push(rsi));
720
721 // Load the value of the referent field.
722 const Address field_address(rax, referent_offset);
723 __ load_heap_oop(rax, field_address, /*tmp1*/ rbx, /*tmp_thread*/ rdx, ON_WEAK_OOP_REF);
724
725 // _areturn
726 const Register sender_sp = NOT_LP64(rsi) LP64_ONLY(r13);
727 NOT_LP64(__ pop(rsi)); // get sender sp
728 __ pop(rdi); // get return address
729 __ mov(rsp, sender_sp); // set sp to sender sp
730 __ jmp(rdi);
731 __ ret(0);
732
733 // generate a vanilla interpreter entry as the slow path
734 __ bind(slow_path);
735 __ jump_to_entry(Interpreter::entry_for_kind(Interpreter::zerolocals));
736 return entry;
737 }
738
739 void TemplateInterpreterGenerator::bang_stack_shadow_pages(bool native_call) {
740 // See more discussion in stackOverflow.hpp.
741
742 // Note that we do the banging after the frame is setup, since the exception
743 // handling code expects to find a valid interpreter frame on the stack.
744 // Doing the banging earlier fails if the caller frame is not an interpreter
745 // frame.
746 // (Also, the exception throwing code expects to unlock any synchronized
747 // method receiver, so do the banging after locking the receiver.)
748
749 const int shadow_zone_size = checked_cast<int>(StackOverflow::stack_shadow_zone_size());
750 const int page_size = (int)os::vm_page_size();
751 const int n_shadow_pages = shadow_zone_size / page_size;
752
753 const Register thread = NOT_LP64(rsi) LP64_ONLY(r15_thread);
754 #ifndef _LP64
755 __ push(thread);
756 __ get_thread(thread);
757 #endif
758
759 #ifdef ASSERT
760 Label L_good_limit;
761 __ cmpptr(Address(thread, JavaThread::shadow_zone_safe_limit()), NULL_WORD);
762 __ jcc(Assembler::notEqual, L_good_limit);
763 __ stop("shadow zone safe limit is not initialized");
764 __ bind(L_good_limit);
765
766 Label L_good_watermark;
767 __ cmpptr(Address(thread, JavaThread::shadow_zone_growth_watermark()), NULL_WORD);
768 __ jcc(Assembler::notEqual, L_good_watermark);
769 __ stop("shadow zone growth watermark is not initialized");
770 __ bind(L_good_watermark);
771 #endif
772
773 Label L_done;
774
775 __ cmpptr(rsp, Address(thread, JavaThread::shadow_zone_growth_watermark()));
776 __ jcc(Assembler::above, L_done);
777
778 for (int p = 1; p <= n_shadow_pages; p++) {
779 __ bang_stack_with_offset(p*page_size);
780 }
781
782 // Record the new watermark, but only if update is above the safe limit.
783 // Otherwise, the next time around the check above would pass the safe limit.
784 __ cmpptr(rsp, Address(thread, JavaThread::shadow_zone_safe_limit()));
785 __ jccb(Assembler::belowEqual, L_done);
786 __ movptr(Address(thread, JavaThread::shadow_zone_growth_watermark()), rsp);
787
788 __ bind(L_done);
789
790 #ifndef _LP64
791 __ pop(thread);
792 #endif
793 }
794
795 // Interpreter stub for calling a native method. (asm interpreter)
796 // This sets up a somewhat different looking stack for calling the
797 // native method than the typical interpreter frame setup.
798 address TemplateInterpreterGenerator::generate_native_entry(bool synchronized) {
799 // determine code generation flags
800 bool inc_counter = UseCompiler || CountCompiledCalls;
801
802 // rbx: Method*
803 // rbcp: sender sp
804
805 address entry_point = __ pc();
806
807 const Address constMethod (rbx, Method::const_offset());
808 const Address access_flags (rbx, Method::access_flags_offset());
809 const Address size_of_parameters(rcx, ConstMethod::
810 size_of_parameters_offset());
811
812
813 // get parameter size (always needed)
814 __ movptr(rcx, constMethod);
815 __ load_unsigned_short(rcx, size_of_parameters);
816
817 // native calls don't need the stack size check since they have no
818 // expression stack and the arguments are already on the stack and
819 // we only add a handful of words to the stack
820
821 // rbx: Method*
822 // rcx: size of parameters
823 // rbcp: sender sp
824 __ pop(rax); // get return address
825
826 // for natives the size of locals is zero
827
828 // compute beginning of parameters
829 __ lea(rlocals, Address(rsp, rcx, Interpreter::stackElementScale(), -wordSize));
830
831 // add 2 zero-initialized slots for native calls
832 // initialize result_handler slot
833 __ push(NULL_WORD);
834 // slot for oop temp
835 // (static native method holder mirror/jni oop result)
836 __ push(NULL_WORD);
837
838 // initialize fixed part of activation frame
839 generate_fixed_frame(true);
840
841 // make sure method is native & not abstract
842 #ifdef ASSERT
843 __ movl(rax, access_flags);
844 {
845 Label L;
846 __ testl(rax, JVM_ACC_NATIVE);
847 __ jcc(Assembler::notZero, L);
848 __ stop("tried to execute non-native method as native");
849 __ bind(L);
850 }
851 {
852 Label L;
853 __ testl(rax, JVM_ACC_ABSTRACT);
854 __ jcc(Assembler::zero, L);
855 __ stop("tried to execute abstract method in interpreter");
856 __ bind(L);
857 }
858 #endif
859
860 // Since at this point in the method invocation the exception handler
861 // would try to exit the monitor of synchronized methods which hasn't
862 // been entered yet, we set the thread local variable
863 // _do_not_unlock_if_synchronized to true. The remove_activation will
864 // check this flag.
865
866 const Register thread1 = NOT_LP64(rax) LP64_ONLY(r15_thread);
867 NOT_LP64(__ get_thread(thread1));
868 const Address do_not_unlock_if_synchronized(thread1,
869 in_bytes(JavaThread::do_not_unlock_if_synchronized_offset()));
870 __ movbool(do_not_unlock_if_synchronized, true);
871
872 // increment invocation count & check for overflow
873 Label invocation_counter_overflow;
874 if (inc_counter) {
875 generate_counter_incr(&invocation_counter_overflow);
876 }
877
878 Label continue_after_compile;
879 __ bind(continue_after_compile);
880
881 bang_stack_shadow_pages(true);
882
883 // reset the _do_not_unlock_if_synchronized flag
884 NOT_LP64(__ get_thread(thread1));
885 __ movbool(do_not_unlock_if_synchronized, false);
886
887 // check for synchronized methods
888 // Must happen AFTER invocation_counter check and stack overflow check,
889 // so method is not locked if overflows.
890 if (synchronized) {
891 lock_method();
892 } else {
893 // no synchronization necessary
894 #ifdef ASSERT
895 {
896 Label L;
897 __ movl(rax, access_flags);
898 __ testl(rax, JVM_ACC_SYNCHRONIZED);
899 __ jcc(Assembler::zero, L);
900 __ stop("method needs synchronization");
901 __ bind(L);
902 }
903 #endif
904 }
905
906 // start execution
907 #ifdef ASSERT
908 {
909 Label L;
910 const Address monitor_block_top(rbp,
911 frame::interpreter_frame_monitor_block_top_offset * wordSize);
912 __ movptr(rax, monitor_block_top);
913 __ lea(rax, Address(rbp, rax, Address::times_ptr));
914 __ cmpptr(rax, rsp);
915 __ jcc(Assembler::equal, L);
916 __ stop("broken stack frame setup in interpreter 5");
917 __ bind(L);
918 }
919 #endif
920
921 // jvmti support
922 __ notify_method_entry();
923
924 // work registers
925 const Register method = rbx;
926 const Register thread = NOT_LP64(rdi) LP64_ONLY(r15_thread);
927 const Register t = NOT_LP64(rcx) LP64_ONLY(r11);
928
929 // allocate space for parameters
930 __ get_method(method);
931 __ movptr(t, Address(method, Method::const_offset()));
932 __ load_unsigned_short(t, Address(t, ConstMethod::size_of_parameters_offset()));
933
934 #ifndef _LP64
935 __ shlptr(t, Interpreter::logStackElementSize); // Convert parameter count to bytes.
936 __ addptr(t, 2*wordSize); // allocate two more slots for JNIEnv and possible mirror
937 __ subptr(rsp, t);
938 __ andptr(rsp, -(StackAlignmentInBytes)); // gcc needs 16 byte aligned stacks to do XMM intrinsics
939 #else
940 __ shll(t, Interpreter::logStackElementSize);
941
942 __ subptr(rsp, t);
943 __ subptr(rsp, frame::arg_reg_save_area_bytes); // windows
944 __ andptr(rsp, -16); // must be 16 byte boundary (see amd64 ABI)
945 #endif // _LP64
946
947 // get signature handler
948 {
949 Label L;
950 __ movptr(t, Address(method, Method::signature_handler_offset()));
951 __ testptr(t, t);
952 __ jcc(Assembler::notZero, L);
953 __ call_VM(noreg,
954 CAST_FROM_FN_PTR(address,
955 InterpreterRuntime::prepare_native_call),
956 method);
957 __ get_method(method);
958 __ movptr(t, Address(method, Method::signature_handler_offset()));
959 __ bind(L);
960 }
961
962 // call signature handler
963 assert(InterpreterRuntime::SignatureHandlerGenerator::from() == rlocals,
964 "adjust this code");
965 assert(InterpreterRuntime::SignatureHandlerGenerator::to() == rsp,
966 "adjust this code");
967 assert(InterpreterRuntime::SignatureHandlerGenerator::temp() == NOT_LP64(t) LP64_ONLY(rscratch1),
968 "adjust this code");
969
970 // The generated handlers do not touch RBX (the method).
971 // However, large signatures cannot be cached and are generated
972 // each time here. The slow-path generator can do a GC on return,
973 // so we must reload it after the call.
974 __ call(t);
975 __ get_method(method); // slow path can do a GC, reload RBX
976
977
978 // result handler is in rax
979 // set result handler
980 __ movptr(Address(rbp,
981 (frame::interpreter_frame_result_handler_offset) * wordSize),
982 rax);
983
984 // pass mirror handle if static call
985 {
986 Label L;
987 __ movl(t, Address(method, Method::access_flags_offset()));
988 __ testl(t, JVM_ACC_STATIC);
989 __ jcc(Assembler::zero, L);
990 // get mirror
991 __ load_mirror(t, method, rax);
992 // copy mirror into activation frame
993 __ movptr(Address(rbp, frame::interpreter_frame_oop_temp_offset * wordSize),
994 t);
995 // pass handle to mirror
996 #ifndef _LP64
997 __ lea(t, Address(rbp, frame::interpreter_frame_oop_temp_offset * wordSize));
998 __ movptr(Address(rsp, wordSize), t);
999 #else
1000 __ lea(c_rarg1,
1001 Address(rbp, frame::interpreter_frame_oop_temp_offset * wordSize));
1002 #endif // _LP64
1003 __ bind(L);
1004 }
1005
1006 // get native function entry point
1007 {
1008 Label L;
1009 __ movptr(rax, Address(method, Method::native_function_offset()));
1010 ExternalAddress unsatisfied(SharedRuntime::native_method_throw_unsatisfied_link_error_entry());
1011 __ cmpptr(rax, unsatisfied.addr(), rscratch1);
1012 __ jcc(Assembler::notEqual, L);
1013 __ call_VM(noreg,
1014 CAST_FROM_FN_PTR(address,
1015 InterpreterRuntime::prepare_native_call),
1016 method);
1017 __ get_method(method);
1018 __ movptr(rax, Address(method, Method::native_function_offset()));
1019 __ bind(L);
1020 }
1021
1022 // pass JNIEnv
1023 #ifndef _LP64
1024 __ get_thread(thread);
1025 __ lea(t, Address(thread, JavaThread::jni_environment_offset()));
1026 __ movptr(Address(rsp, 0), t);
1027
1028 // set_last_Java_frame_before_call
1029 // It is enough that the pc()
1030 // points into the right code segment. It does not have to be the correct return pc.
1031 __ set_last_Java_frame(thread, noreg, rbp, __ pc(), noreg);
1032 #else
1033 __ lea(c_rarg0, Address(r15_thread, JavaThread::jni_environment_offset()));
1034
1035 // It is enough that the pc() points into the right code
1036 // segment. It does not have to be the correct return pc.
1037 __ set_last_Java_frame(rsp, rbp, (address) __ pc(), rscratch1);
1038 #endif // _LP64
1039
1040 // change thread state
1041 #ifdef ASSERT
1042 {
1043 Label L;
1044 __ movl(t, Address(thread, JavaThread::thread_state_offset()));
1045 __ cmpl(t, _thread_in_Java);
1046 __ jcc(Assembler::equal, L);
1047 __ stop("Wrong thread state in native stub");
1048 __ bind(L);
1049 }
1050 #endif
1051
1052 // Change state to native
1053
1054 __ movl(Address(thread, JavaThread::thread_state_offset()),
1055 _thread_in_native);
1056
1057 // Call the native method.
1058 __ call(rax);
1059 // 32: result potentially in rdx:rax or ST0
1060 // 64: result potentially in rax or xmm0
1061
1062 // Verify or restore cpu control state after JNI call
1063 __ restore_cpu_control_state_after_jni(rscratch1);
1064
1065 // NOTE: The order of these pushes is known to frame::interpreter_frame_result
1066 // in order to extract the result of a method call. If the order of these
1067 // pushes change or anything else is added to the stack then the code in
1068 // interpreter_frame_result must also change.
1069
1070 #ifndef _LP64
1071 // save potential result in ST(0) & rdx:rax
1072 // (if result handler is the T_FLOAT or T_DOUBLE handler, result must be in ST0 -
1073 // the check is necessary to avoid potential Intel FPU overflow problems by saving/restoring 'empty' FPU registers)
1074 // It is safe to do this push because state is _thread_in_native and return address will be found
1075 // via _last_native_pc and not via _last_jave_sp
1076
1077 // NOTE: the order of these push(es) is known to frame::interpreter_frame_result.
1078 // If the order changes or anything else is added to the stack the code in
1079 // interpreter_frame_result will have to be changed.
1080
1081 { Label L;
1082 Label push_double;
1083 ExternalAddress float_handler(AbstractInterpreter::result_handler(T_FLOAT));
1084 ExternalAddress double_handler(AbstractInterpreter::result_handler(T_DOUBLE));
1085 __ cmpptr(Address(rbp, (frame::interpreter_frame_oop_temp_offset + 1)*wordSize),
1086 float_handler.addr(), noreg);
1087 __ jcc(Assembler::equal, push_double);
1088 __ cmpptr(Address(rbp, (frame::interpreter_frame_oop_temp_offset + 1)*wordSize),
1089 double_handler.addr(), noreg);
1090 __ jcc(Assembler::notEqual, L);
1091 __ bind(push_double);
1092 __ push_d(); // FP values are returned using the FPU, so push FPU contents (even if UseSSE > 0).
1093 __ bind(L);
1094 }
1095 #else
1096 __ push(dtos);
1097 #endif // _LP64
1098
1099 __ push(ltos);
1100
1101 // change thread state
1102 NOT_LP64(__ get_thread(thread));
1103 __ movl(Address(thread, JavaThread::thread_state_offset()),
1104 _thread_in_native_trans);
1105
1106 // Force this write out before the read below
1107 if (!UseSystemMemoryBarrier) {
1108 __ membar(Assembler::Membar_mask_bits(
1109 Assembler::LoadLoad | Assembler::LoadStore |
1110 Assembler::StoreLoad | Assembler::StoreStore));
1111 }
1112 #ifndef _LP64
1113 if (AlwaysRestoreFPU) {
1114 // Make sure the control word is correct.
1115 __ fldcw(ExternalAddress(StubRoutines::x86::addr_fpu_cntrl_wrd_std()));
1116 }
1117 #endif // _LP64
1118
1119 // check for safepoint operation in progress and/or pending suspend requests
1120 {
1121 Label Continue;
1122 Label slow_path;
1123
1124 __ safepoint_poll(slow_path, thread, true /* at_return */, false /* in_nmethod */);
1125
1126 __ cmpl(Address(thread, JavaThread::suspend_flags_offset()), 0);
1127 __ jcc(Assembler::equal, Continue);
1128 __ bind(slow_path);
1129
1130 // Don't use call_VM as it will see a possible pending exception
1131 // and forward it and never return here preventing us from
1132 // clearing _last_native_pc down below. Also can't use
1133 // call_VM_leaf either as it will check to see if r13 & r14 are
1134 // preserved and correspond to the bcp/locals pointers. So we do a
1135 // runtime call by hand.
1136 //
1137 #ifndef _LP64
1138 __ push(thread);
1139 __ call(RuntimeAddress(CAST_FROM_FN_PTR(address,
1140 JavaThread::check_special_condition_for_native_trans)));
1141 __ increment(rsp, wordSize);
1142 __ get_thread(thread);
1143 #else
1144 __ mov(c_rarg0, r15_thread);
1145 __ mov(r12, rsp); // remember sp (can only use r12 if not using call_VM)
1146 __ subptr(rsp, frame::arg_reg_save_area_bytes); // windows
1147 __ andptr(rsp, -16); // align stack as required by ABI
1148 __ call(RuntimeAddress(CAST_FROM_FN_PTR(address, JavaThread::check_special_condition_for_native_trans)));
1149 __ mov(rsp, r12); // restore sp
1150 __ reinit_heapbase();
1151 #endif // _LP64
1152 __ bind(Continue);
1153 }
1154
1155 // change thread state
1156 __ movl(Address(thread, JavaThread::thread_state_offset()), _thread_in_Java);
1157
1158 // reset_last_Java_frame
1159 __ reset_last_Java_frame(thread, true);
1160
1161 if (CheckJNICalls) {
1162 // clear_pending_jni_exception_check
1163 __ movptr(Address(thread, JavaThread::pending_jni_exception_check_fn_offset()), NULL_WORD);
1164 }
1165
1166 // reset handle block
1167 __ movptr(t, Address(thread, JavaThread::active_handles_offset()));
1168 __ movl(Address(t, JNIHandleBlock::top_offset()), NULL_WORD);
1169
1170 // If result is an oop unbox and store it in frame where gc will see it
1171 // and result handler will pick it up
1172
1173 {
1174 Label no_oop;
1175 __ lea(t, ExternalAddress(AbstractInterpreter::result_handler(T_OBJECT)));
1176 __ cmpptr(t, Address(rbp, frame::interpreter_frame_result_handler_offset*wordSize));
1177 __ jcc(Assembler::notEqual, no_oop);
1178 // retrieve result
1179 __ pop(ltos);
1180 // Unbox oop result, e.g. JNIHandles::resolve value.
1181 __ resolve_jobject(rax /* value */,
1182 thread /* thread */,
1183 t /* tmp */);
1184 __ movptr(Address(rbp, frame::interpreter_frame_oop_temp_offset*wordSize), rax);
1185 // keep stack depth as expected by pushing oop which will eventually be discarded
1186 __ push(ltos);
1187 __ bind(no_oop);
1188 }
1189
1190
1191 {
1192 Label no_reguard;
1193 __ cmpl(Address(thread, JavaThread::stack_guard_state_offset()),
1194 StackOverflow::stack_guard_yellow_reserved_disabled);
1195 __ jcc(Assembler::notEqual, no_reguard);
1196
1197 __ pusha(); // XXX only save smashed registers
1198 #ifndef _LP64
1199 __ call(RuntimeAddress(CAST_FROM_FN_PTR(address, SharedRuntime::reguard_yellow_pages)));
1200 __ popa();
1201 #else
1202 __ mov(r12, rsp); // remember sp (can only use r12 if not using call_VM)
1203 __ subptr(rsp, frame::arg_reg_save_area_bytes); // windows
1204 __ andptr(rsp, -16); // align stack as required by ABI
1205 __ call(RuntimeAddress(CAST_FROM_FN_PTR(address, SharedRuntime::reguard_yellow_pages)));
1206 __ mov(rsp, r12); // restore sp
1207 __ popa(); // XXX only restore smashed registers
1208 __ reinit_heapbase();
1209 #endif // _LP64
1210
1211 __ bind(no_reguard);
1212 }
1213
1214
1215 // The method register is junk from after the thread_in_native transition
1216 // until here. Also can't call_VM until the bcp has been
1217 // restored. Need bcp for throwing exception below so get it now.
1218 __ get_method(method);
1219
1220 // restore to have legal interpreter frame, i.e., bci == 0 <=> code_base()
1221 __ movptr(rbcp, Address(method, Method::const_offset())); // get ConstMethod*
1222 __ lea(rbcp, Address(rbcp, ConstMethod::codes_offset())); // get codebase
1223
1224 // handle exceptions (exception handling will handle unlocking!)
1225 {
1226 Label L;
1227 __ cmpptr(Address(thread, Thread::pending_exception_offset()), NULL_WORD);
1228 __ jcc(Assembler::zero, L);
1229 // Note: At some point we may want to unify this with the code
1230 // used in call_VM_base(); i.e., we should use the
1231 // StubRoutines::forward_exception code. For now this doesn't work
1232 // here because the rsp is not correctly set at this point.
1233 __ MacroAssembler::call_VM(noreg,
1234 CAST_FROM_FN_PTR(address,
1235 InterpreterRuntime::throw_pending_exception));
1236 __ should_not_reach_here();
1237 __ bind(L);
1238 }
1239
1240 // do unlocking if necessary
1241 {
1242 Label L;
1243 __ movl(t, Address(method, Method::access_flags_offset()));
1244 __ testl(t, JVM_ACC_SYNCHRONIZED);
1245 __ jcc(Assembler::zero, L);
1246 // the code below should be shared with interpreter macro
1247 // assembler implementation
1248 {
1249 Label unlock;
1250 // BasicObjectLock will be first in list, since this is a
1251 // synchronized method. However, need to check that the object
1252 // has not been unlocked by an explicit monitorexit bytecode.
1253 const Address monitor(rbp,
1254 (intptr_t)(frame::interpreter_frame_initial_sp_offset *
1255 wordSize - (int)sizeof(BasicObjectLock)));
1256
1257 const Register regmon = NOT_LP64(rdx) LP64_ONLY(c_rarg1);
1258
1259 // monitor expect in c_rarg1 for slow unlock path
1260 __ lea(regmon, monitor); // address of first monitor
1261
1262 __ movptr(t, Address(regmon, BasicObjectLock::obj_offset()));
1263 __ testptr(t, t);
1264 __ jcc(Assembler::notZero, unlock);
1265
1266 // Entry already unlocked, need to throw exception
1267 __ MacroAssembler::call_VM(noreg,
1268 CAST_FROM_FN_PTR(address,
1269 InterpreterRuntime::throw_illegal_monitor_state_exception));
1270 __ should_not_reach_here();
1271
1272 __ bind(unlock);
1273 __ unlock_object(regmon);
1274 }
1275 __ bind(L);
1276 }
1277
1278 // jvmti support
1279 // Note: This must happen _after_ handling/throwing any exceptions since
1280 // the exception handler code notifies the runtime of method exits
1281 // too. If this happens before, method entry/exit notifications are
1282 // not properly paired (was bug - gri 11/22/99).
1283 __ notify_method_exit(vtos, InterpreterMacroAssembler::NotifyJVMTI);
1284
1285 // restore potential result in edx:eax, call result handler to
1286 // restore potential result in ST0 & handle result
1287
1288 __ pop(ltos);
1289 LP64_ONLY( __ pop(dtos));
1290
1291 __ movptr(t, Address(rbp,
1292 (frame::interpreter_frame_result_handler_offset) * wordSize));
1293 __ call(t);
1294
1295 // remove activation
1296 __ movptr(t, Address(rbp,
1297 frame::interpreter_frame_sender_sp_offset *
1298 wordSize)); // get sender sp
1299 __ leave(); // remove frame anchor
1300 __ pop(rdi); // get return address
1301 __ mov(rsp, t); // set sp to sender sp
1302 __ jmp(rdi);
1303
1304 if (inc_counter) {
1305 // Handle overflow of counter and compile method
1306 __ bind(invocation_counter_overflow);
1307 generate_counter_overflow(continue_after_compile);
1308 }
1309
1310 return entry_point;
1311 }
1312
1313 // Abstract method entry
1314 // Attempt to execute abstract method. Throw exception
1315 address TemplateInterpreterGenerator::generate_abstract_entry(void) {
1316
1317 address entry_point = __ pc();
1318
1319 // abstract method entry
1320
1321 // pop return address, reset last_sp to null
1322 __ empty_expression_stack();
1323 __ restore_bcp(); // rsi must be correct for exception handler (was destroyed)
1324 __ restore_locals(); // make sure locals pointer is correct as well (was destroyed)
1325
1326 // throw exception
1327 __ call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::throw_AbstractMethodErrorWithMethod), rbx);
1328 // the call_VM checks for exception, so we should never return here.
1329 __ should_not_reach_here();
1330
1331 return entry_point;
1332 }
1333
1334 //
1335 // Generic interpreted method entry to (asm) interpreter
1336 //
1337 address TemplateInterpreterGenerator::generate_normal_entry(bool synchronized) {
1338 // determine code generation flags
1339 bool inc_counter = UseCompiler || CountCompiledCalls;
1340
1341 // ebx: Method*
1342 // rbcp: sender sp (set in InterpreterMacroAssembler::prepare_to_jump_from_interpreted / generate_call_stub)
1343 address entry_point = __ pc();
1344
1345 const Address constMethod(rbx, Method::const_offset());
1346 const Address access_flags(rbx, Method::access_flags_offset());
1347 const Address size_of_parameters(rdx,
1348 ConstMethod::size_of_parameters_offset());
1349 const Address size_of_locals(rdx, ConstMethod::size_of_locals_offset());
1350
1351
1352 // get parameter size (always needed)
1353 __ movptr(rdx, constMethod);
1354 __ load_unsigned_short(rcx, size_of_parameters);
1355
1356 // rbx: Method*
1357 // rcx: size of parameters
1358 // rbcp: sender_sp (could differ from sp+wordSize if we were called via c2i )
1359
1360 __ load_unsigned_short(rdx, size_of_locals); // get size of locals in words
1361 __ subl(rdx, rcx); // rdx = no. of additional locals
1362
1363 // YYY
1364 // __ incrementl(rdx);
1365 // __ andl(rdx, -2);
1366
1367 // see if we've got enough room on the stack for locals plus overhead.
1368 generate_stack_overflow_check();
1369
1370 // get return address
1371 __ pop(rax);
1372
1373 // compute beginning of parameters
1374 __ lea(rlocals, Address(rsp, rcx, Interpreter::stackElementScale(), -wordSize));
1375
1376 // rdx - # of additional locals
1377 // allocate space for locals
1378 // explicitly initialize locals
1379 {
1380 Label exit, loop;
1381 __ testl(rdx, rdx);
1382 __ jcc(Assembler::lessEqual, exit); // do nothing if rdx <= 0
1383 __ bind(loop);
1384 __ push(NULL_WORD); // initialize local variables
1385 __ decrementl(rdx); // until everything initialized
1386 __ jcc(Assembler::greater, loop);
1387 __ bind(exit);
1388 }
1389
1390 // initialize fixed part of activation frame
1391 generate_fixed_frame(false);
1392
1393 // make sure method is not native & not abstract
1394 #ifdef ASSERT
1395 __ movl(rax, access_flags);
1396 {
1397 Label L;
1398 __ testl(rax, JVM_ACC_NATIVE);
1399 __ jcc(Assembler::zero, L);
1400 __ stop("tried to execute native method as non-native");
1401 __ bind(L);
1402 }
1403 {
1404 Label L;
1405 __ testl(rax, JVM_ACC_ABSTRACT);
1406 __ jcc(Assembler::zero, L);
1407 __ stop("tried to execute abstract method in interpreter");
1408 __ bind(L);
1409 }
1410 #endif
1411
1412 // Since at this point in the method invocation the exception
1413 // handler would try to exit the monitor of synchronized methods
1414 // which hasn't been entered yet, we set the thread local variable
1415 // _do_not_unlock_if_synchronized to true. The remove_activation
1416 // will check this flag.
1417
1418 const Register thread = NOT_LP64(rax) LP64_ONLY(r15_thread);
1419 NOT_LP64(__ get_thread(thread));
1420 const Address do_not_unlock_if_synchronized(thread,
1421 in_bytes(JavaThread::do_not_unlock_if_synchronized_offset()));
1422 __ movbool(do_not_unlock_if_synchronized, true);
1423
1424 __ profile_parameters_type(rax, rcx, rdx);
1425 // increment invocation count & check for overflow
1426 Label invocation_counter_overflow;
1427 if (inc_counter) {
1428 generate_counter_incr(&invocation_counter_overflow);
1429 }
1430
1431 Label continue_after_compile;
1432 __ bind(continue_after_compile);
1433
1434 // check for synchronized interpreted methods
1435 bang_stack_shadow_pages(false);
1436
1437 // reset the _do_not_unlock_if_synchronized flag
1438 NOT_LP64(__ get_thread(thread));
1439 __ movbool(do_not_unlock_if_synchronized, false);
1440
1441 // check for synchronized methods
1442 // Must happen AFTER invocation_counter check and stack overflow check,
1443 // so method is not locked if overflows.
1444 if (synchronized) {
1445 // Allocate monitor and lock method
1446 lock_method();
1447 } else {
1448 // no synchronization necessary
1449 #ifdef ASSERT
1450 {
1451 Label L;
1452 __ movl(rax, access_flags);
1453 __ testl(rax, JVM_ACC_SYNCHRONIZED);
1454 __ jcc(Assembler::zero, L);
1455 __ stop("method needs synchronization");
1456 __ bind(L);
1457 }
1458 #endif
1459 }
1460
1461 // start execution
1462 #ifdef ASSERT
1463 {
1464 Label L;
1465 const Address monitor_block_top (rbp,
1466 frame::interpreter_frame_monitor_block_top_offset * wordSize);
1467 __ movptr(rax, monitor_block_top);
1468 __ lea(rax, Address(rbp, rax, Address::times_ptr));
1469 __ cmpptr(rax, rsp);
1470 __ jcc(Assembler::equal, L);
1471 __ stop("broken stack frame setup in interpreter 6");
1472 __ bind(L);
1473 }
1474 #endif
1475
1476 // jvmti support
1477 __ notify_method_entry();
1478
1479 __ dispatch_next(vtos);
1480
1481 // invocation counter overflow
1482 if (inc_counter) {
1483 // Handle overflow of counter and compile method
1484 __ bind(invocation_counter_overflow);
1485 generate_counter_overflow(continue_after_compile);
1486 }
1487
1488 return entry_point;
1489 }
1490
1491 //-----------------------------------------------------------------------------
1492 // Exceptions
1493
1494 void TemplateInterpreterGenerator::generate_throw_exception() {
1495 // Entry point in previous activation (i.e., if the caller was
1496 // interpreted)
1497 Interpreter::_rethrow_exception_entry = __ pc();
1498 // Restore sp to interpreter_frame_last_sp even though we are going
1499 // to empty the expression stack for the exception processing.
1500 __ movptr(Address(rbp, frame::interpreter_frame_last_sp_offset * wordSize), NULL_WORD);
1501 // rax: exception
1502 // rdx: return address/pc that threw exception
1503 __ restore_bcp(); // r13/rsi points to call/send
1504 __ restore_locals();
1505 LP64_ONLY(__ reinit_heapbase()); // restore r12 as heapbase.
1506 // Entry point for exceptions thrown within interpreter code
1507 Interpreter::_throw_exception_entry = __ pc();
1508 // expression stack is undefined here
1509 // rax: exception
1510 // r13/rsi: exception bcp
1511 __ verify_oop(rax);
1512 Register rarg = NOT_LP64(rax) LP64_ONLY(c_rarg1);
1513 LP64_ONLY(__ mov(c_rarg1, rax));
1514
1515 // expression stack must be empty before entering the VM in case of
1516 // an exception
1517 __ empty_expression_stack();
1518 // find exception handler address and preserve exception oop
1519 __ call_VM(rdx,
1520 CAST_FROM_FN_PTR(address,
1521 InterpreterRuntime::exception_handler_for_exception),
1522 rarg);
1523 // rax: exception handler entry point
1524 // rdx: preserved exception oop
1525 // r13/rsi: bcp for exception handler
1526 __ push_ptr(rdx); // push exception which is now the only value on the stack
1527 __ jmp(rax); // jump to exception handler (may be _remove_activation_entry!)
1528
1529 // If the exception is not handled in the current frame the frame is
1530 // removed and the exception is rethrown (i.e. exception
1531 // continuation is _rethrow_exception).
1532 //
1533 // Note: At this point the bci is still the bxi for the instruction
1534 // which caused the exception and the expression stack is
1535 // empty. Thus, for any VM calls at this point, GC will find a legal
1536 // oop map (with empty expression stack).
1537
1538 // In current activation
1539 // tos: exception
1540 // esi: exception bcp
1541
1542 //
1543 // JVMTI PopFrame support
1544 //
1545
1546 Interpreter::_remove_activation_preserving_args_entry = __ pc();
1547 __ empty_expression_stack();
1548 // Set the popframe_processing bit in pending_popframe_condition
1549 // indicating that we are currently handling popframe, so that
1550 // call_VMs that may happen later do not trigger new popframe
1551 // handling cycles.
1552 const Register thread = NOT_LP64(rcx) LP64_ONLY(r15_thread);
1553 NOT_LP64(__ get_thread(thread));
1554 __ movl(rdx, Address(thread, JavaThread::popframe_condition_offset()));
1555 __ orl(rdx, JavaThread::popframe_processing_bit);
1556 __ movl(Address(thread, JavaThread::popframe_condition_offset()), rdx);
1557
1558 {
1559 // Check to see whether we are returning to a deoptimized frame.
1560 // (The PopFrame call ensures that the caller of the popped frame is
1561 // either interpreted or compiled and deoptimizes it if compiled.)
1562 // In this case, we can't call dispatch_next() after the frame is
1563 // popped, but instead must save the incoming arguments and restore
1564 // them after deoptimization has occurred.
1565 //
1566 // Note that we don't compare the return PC against the
1567 // deoptimization blob's unpack entry because of the presence of
1568 // adapter frames in C2.
1569 Label caller_not_deoptimized;
1570 Register rarg = NOT_LP64(rdx) LP64_ONLY(c_rarg1);
1571 __ movptr(rarg, Address(rbp, frame::return_addr_offset * wordSize));
1572 __ super_call_VM_leaf(CAST_FROM_FN_PTR(address,
1573 InterpreterRuntime::interpreter_contains), rarg);
1574 __ testl(rax, rax);
1575 __ jcc(Assembler::notZero, caller_not_deoptimized);
1576
1577 // Compute size of arguments for saving when returning to
1578 // deoptimized caller
1579 __ get_method(rax);
1580 __ movptr(rax, Address(rax, Method::const_offset()));
1581 __ load_unsigned_short(rax, Address(rax, in_bytes(ConstMethod::
1582 size_of_parameters_offset())));
1583 __ shll(rax, Interpreter::logStackElementSize);
1584 __ restore_locals();
1585 __ subptr(rlocals, rax);
1586 __ addptr(rlocals, wordSize);
1587 // Save these arguments
1588 NOT_LP64(__ get_thread(thread));
1589 __ super_call_VM_leaf(CAST_FROM_FN_PTR(address,
1590 Deoptimization::
1591 popframe_preserve_args),
1592 thread, rax, rlocals);
1593
1594 __ remove_activation(vtos, rdx,
1595 /* throw_monitor_exception */ false,
1596 /* install_monitor_exception */ false,
1597 /* notify_jvmdi */ false);
1598
1599 // Inform deoptimization that it is responsible for restoring
1600 // these arguments
1601 NOT_LP64(__ get_thread(thread));
1602 __ movl(Address(thread, JavaThread::popframe_condition_offset()),
1603 JavaThread::popframe_force_deopt_reexecution_bit);
1604
1605 // Continue in deoptimization handler
1606 __ jmp(rdx);
1607
1608 __ bind(caller_not_deoptimized);
1609 }
1610
1611 __ remove_activation(vtos, rdx, /* rdx result (retaddr) is not used */
1612 /* throw_monitor_exception */ false,
1613 /* install_monitor_exception */ false,
1614 /* notify_jvmdi */ false);
1615
1616 // Finish with popframe handling
1617 // A previous I2C followed by a deoptimization might have moved the
1618 // outgoing arguments further up the stack. PopFrame expects the
1619 // mutations to those outgoing arguments to be preserved and other
1620 // constraints basically require this frame to look exactly as
1621 // though it had previously invoked an interpreted activation with
1622 // no space between the top of the expression stack (current
1623 // last_sp) and the top of stack. Rather than force deopt to
1624 // maintain this kind of invariant all the time we call a small
1625 // fixup routine to move the mutated arguments onto the top of our
1626 // expression stack if necessary.
1627 #ifndef _LP64
1628 __ mov(rax, rsp);
1629 __ movptr(rbx, Address(rbp, frame::interpreter_frame_last_sp_offset * wordSize));
1630 __ lea(rbx, Address(rbp, rbx, Address::times_ptr));
1631 __ get_thread(thread);
1632 // PC must point into interpreter here
1633 __ set_last_Java_frame(thread, noreg, rbp, __ pc(), noreg);
1634 __ super_call_VM_leaf(CAST_FROM_FN_PTR(address, InterpreterRuntime::popframe_move_outgoing_args), thread, rax, rbx);
1635 __ get_thread(thread);
1636 #else
1637 __ mov(c_rarg1, rsp);
1638 __ movptr(c_rarg2, Address(rbp, frame::interpreter_frame_last_sp_offset * wordSize));
1639 __ lea(c_rarg2, Address(rbp, c_rarg2, Address::times_ptr));
1640 // PC must point into interpreter here
1641 __ set_last_Java_frame(noreg, rbp, __ pc(), rscratch1);
1642 __ super_call_VM_leaf(CAST_FROM_FN_PTR(address, InterpreterRuntime::popframe_move_outgoing_args), r15_thread, c_rarg1, c_rarg2);
1643 #endif
1644 __ reset_last_Java_frame(thread, true);
1645
1646 // Restore the last_sp and null it out
1647 __ movptr(rcx, Address(rbp, frame::interpreter_frame_last_sp_offset * wordSize));
1648 __ lea(rsp, Address(rbp, rcx, Address::times_ptr));
1649 __ movptr(Address(rbp, frame::interpreter_frame_last_sp_offset * wordSize), NULL_WORD);
1650
1651 __ restore_bcp();
1652 __ restore_locals();
1653 // The method data pointer was incremented already during
1654 // call profiling. We have to restore the mdp for the current bcp.
1655 if (ProfileInterpreter) {
1656 __ set_method_data_pointer_for_bcp();
1657 }
1658
1659 // Clear the popframe condition flag
1660 NOT_LP64(__ get_thread(thread));
1661 __ movl(Address(thread, JavaThread::popframe_condition_offset()),
1662 JavaThread::popframe_inactive);
1663
1664 #if INCLUDE_JVMTI
1665 {
1666 Label L_done;
1667 const Register local0 = rlocals;
1668
1669 __ cmpb(Address(rbcp, 0), Bytecodes::_invokestatic);
1670 __ jcc(Assembler::notEqual, L_done);
1671
1672 // The member name argument must be restored if _invokestatic is re-executed after a PopFrame call.
1673 // Detect such a case in the InterpreterRuntime function and return the member name argument, or null.
1674
1675 __ get_method(rdx);
1676 __ movptr(rax, Address(local0, 0));
1677 __ call_VM(rax, CAST_FROM_FN_PTR(address, InterpreterRuntime::member_name_arg_or_null), rax, rdx, rbcp);
1678
1679 __ testptr(rax, rax);
1680 __ jcc(Assembler::zero, L_done);
1681
1682 __ movptr(Address(rbx, 0), rax);
1683 __ bind(L_done);
1684 }
1685 #endif // INCLUDE_JVMTI
1686
1687 __ dispatch_next(vtos);
1688 // end of PopFrame support
1689
1690 Interpreter::_remove_activation_entry = __ pc();
1691
1692 // preserve exception over this code sequence
1693 __ pop_ptr(rax);
1694 NOT_LP64(__ get_thread(thread));
1695 __ movptr(Address(thread, JavaThread::vm_result_offset()), rax);
1696 // remove the activation (without doing throws on illegalMonitorExceptions)
1697 __ remove_activation(vtos, rdx, false, true, false);
1698 // restore exception
1699 NOT_LP64(__ get_thread(thread));
1700 __ get_vm_result(rax, thread);
1701
1702 // In between activations - previous activation type unknown yet
1703 // compute continuation point - the continuation point expects the
1704 // following registers set up:
1705 //
1706 // rax: exception
1707 // rdx: return address/pc that threw exception
1708 // rsp: expression stack of caller
1709 // rbp: ebp of caller
1710 __ push(rax); // save exception
1711 __ push(rdx); // save return address
1712 __ super_call_VM_leaf(CAST_FROM_FN_PTR(address,
1713 SharedRuntime::exception_handler_for_return_address),
1714 thread, rdx);
1715 __ mov(rbx, rax); // save exception handler
1716 __ pop(rdx); // restore return address
1717 __ pop(rax); // restore exception
1718 // Note that an "issuing PC" is actually the next PC after the call
1719 __ jmp(rbx); // jump to exception
1720 // handler of caller
1721 }
1722
1723
1724 //
1725 // JVMTI ForceEarlyReturn support
1726 //
1727 address TemplateInterpreterGenerator::generate_earlyret_entry_for(TosState state) {
1728 address entry = __ pc();
1729
1730 __ restore_bcp();
1731 __ restore_locals();
1732 __ empty_expression_stack();
1733 __ load_earlyret_value(state); // 32 bits returns value in rdx, so don't reuse
1734
1735 const Register thread = NOT_LP64(rcx) LP64_ONLY(r15_thread);
1736 NOT_LP64(__ get_thread(thread));
1737 __ movptr(rcx, Address(thread, JavaThread::jvmti_thread_state_offset()));
1738 Address cond_addr(rcx, JvmtiThreadState::earlyret_state_offset());
1739
1740 // Clear the earlyret state
1741 __ movl(cond_addr, JvmtiThreadState::earlyret_inactive);
1742
1743 __ remove_activation(state, rsi,
1744 false, /* throw_monitor_exception */
1745 false, /* install_monitor_exception */
1746 true); /* notify_jvmdi */
1747 __ jmp(rsi);
1748
1749 return entry;
1750 } // end of ForceEarlyReturn support
1751
1752
1753 //-----------------------------------------------------------------------------
1754 // Helper for vtos entry point generation
1755
1756 void TemplateInterpreterGenerator::set_vtos_entry_points(Template* t,
1757 address& bep,
1758 address& cep,
1759 address& sep,
1760 address& aep,
1761 address& iep,
1762 address& lep,
1763 address& fep,
1764 address& dep,
1765 address& vep) {
1766 assert(t->is_valid() && t->tos_in() == vtos, "illegal template");
1767 Label L;
1768 #ifndef _LP64
1769 fep = __ pc(); // ftos entry point
1770 __ push(ftos);
1771 __ jmpb(L);
1772 dep = __ pc(); // dtos entry point
1773 __ push(dtos);
1774 __ jmpb(L);
1775 #else
1776 fep = __ pc(); // ftos entry point
1777 __ push_f(xmm0);
1778 __ jmpb(L);
1779 dep = __ pc(); // dtos entry point
1780 __ push_d(xmm0);
1781 __ jmpb(L);
1782 #endif // _LP64
1783 lep = __ pc(); // ltos entry point
1784 __ push_l();
1785 __ jmpb(L);
1786 aep = bep = cep = sep = iep = __ pc(); // [abcsi]tos entry point
1787 __ push_i_or_ptr();
1788 vep = __ pc(); // vtos entry point
1789 __ bind(L);
1790 generate_and_dispatch(t);
1791 }
1792
1793 //-----------------------------------------------------------------------------
1794
1795 // Non-product code
1796 #ifndef PRODUCT
1797
1798 address TemplateInterpreterGenerator::generate_trace_code(TosState state) {
1799 address entry = __ pc();
1800
1801 #ifndef _LP64
1802 // prepare expression stack
1803 __ pop(rcx); // pop return address so expression stack is 'pure'
1804 __ push(state); // save tosca
1805
1806 // pass tosca registers as arguments & call tracer
1807 __ call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::trace_bytecode), rcx, rax, rdx);
1808 __ mov(rcx, rax); // make sure return address is not destroyed by pop(state)
1809 __ pop(state); // restore tosca
1810
1811 // return
1812 __ jmp(rcx);
1813 #else
1814 __ push(state);
1815 __ push(c_rarg0);
1816 __ push(c_rarg1);
1817 __ push(c_rarg2);
1818 __ push(c_rarg3);
1819 __ mov(c_rarg2, rax); // Pass itos
1820 #ifdef _WIN64
1821 __ movflt(xmm3, xmm0); // Pass ftos
1822 #endif
1823 __ call_VM(noreg,
1824 CAST_FROM_FN_PTR(address, InterpreterRuntime::trace_bytecode),
1825 c_rarg1, c_rarg2, c_rarg3);
1826 __ pop(c_rarg3);
1827 __ pop(c_rarg2);
1828 __ pop(c_rarg1);
1829 __ pop(c_rarg0);
1830 __ pop(state);
1831 __ ret(0); // return from result handler
1832 #endif // _LP64
1833
1834 return entry;
1835 }
1836
1837 void TemplateInterpreterGenerator::count_bytecode() {
1838 __ incrementl(ExternalAddress((address) &BytecodeCounter::_counter_value), rscratch1);
1839 }
1840
1841 void TemplateInterpreterGenerator::histogram_bytecode(Template* t) {
1842 __ incrementl(ExternalAddress((address) &BytecodeHistogram::_counters[t->bytecode()]), rscratch1);
1843 }
1844
1845 void TemplateInterpreterGenerator::histogram_bytecode_pair(Template* t) {
1846 __ mov32(rbx, ExternalAddress((address) &BytecodePairHistogram::_index));
1847 __ shrl(rbx, BytecodePairHistogram::log2_number_of_codes);
1848 __ orl(rbx,
1849 ((int) t->bytecode()) <<
1850 BytecodePairHistogram::log2_number_of_codes);
1851 __ mov32(ExternalAddress((address) &BytecodePairHistogram::_index), rbx, rscratch1);
1852 __ lea(rscratch1, ExternalAddress((address) BytecodePairHistogram::_counters));
1853 __ incrementl(Address(rscratch1, rbx, Address::times_4));
1854 }
1855
1856
1857 void TemplateInterpreterGenerator::trace_bytecode(Template* t) {
1858 // Call a little run-time stub to avoid blow-up for each bytecode.
1859 // The run-time runtime saves the right registers, depending on
1860 // the tosca in-state for the given template.
1861
1862 assert(Interpreter::trace_code(t->tos_in()) != nullptr,
1863 "entry must have been generated");
1864 #ifndef _LP64
1865 __ call(RuntimeAddress(Interpreter::trace_code(t->tos_in())));
1866 #else
1867 __ mov(r12, rsp); // remember sp (can only use r12 if not using call_VM)
1868 __ andptr(rsp, -16); // align stack as required by ABI
1869 __ call(RuntimeAddress(Interpreter::trace_code(t->tos_in())));
1870 __ mov(rsp, r12); // restore sp
1871 __ reinit_heapbase();
1872 #endif // _LP64
1873 }
1874
1875
1876 void TemplateInterpreterGenerator::stop_interpreter_at() {
1877 Label L;
1878 __ cmp32(ExternalAddress((address) &BytecodeCounter::_counter_value),
1879 StopInterpreterAt,
1880 rscratch1);
1881 __ jcc(Assembler::notEqual, L);
1882 __ int3();
1883 __ bind(L);
1884 }
1885 #endif // !PRODUCT