1 /*
2 * Copyright (c) 1997, 2015, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
23 */
24
25 #include "precompiled.hpp"
26 #include "asm/macroAssembler.hpp"
27 #include "interpreter/bytecodeHistogram.hpp"
28 #include "interpreter/interpreter.hpp"
29 #include "interpreter/interpreterGenerator.hpp"
30 #include "interpreter/interpreterRuntime.hpp"
31 #include "interpreter/interp_masm.hpp"
32 #include "interpreter/templateTable.hpp"
33 #include "oops/arrayOop.hpp"
34 #include "oops/methodData.hpp"
35 #include "oops/method.hpp"
36 #include "oops/oop.inline.hpp"
37 #include "prims/jvmtiExport.hpp"
38 #include "prims/jvmtiThreadState.hpp"
39 #include "runtime/arguments.hpp"
40 #include "runtime/deoptimization.hpp"
41 #include "runtime/frame.inline.hpp"
42 #include "runtime/sharedRuntime.hpp"
43 #include "runtime/stubRoutines.hpp"
44 #include "runtime/synchronizer.hpp"
45 #include "runtime/timer.hpp"
46 #include "runtime/vframeArray.hpp"
47 #include "utilities/debug.hpp"
48 #include "utilities/macros.hpp"
49
50 #define __ _masm->
51
52
53 #ifndef CC_INTERP
54 const int method_offset = frame::interpreter_frame_method_offset * wordSize;
55 const int bcp_offset = frame::interpreter_frame_bcp_offset * wordSize;
56 const int locals_offset = frame::interpreter_frame_locals_offset * wordSize;
57
58 //------------------------------------------------------------------------------------------------------------------------
59
60 address TemplateInterpreterGenerator::generate_StackOverflowError_handler() {
61 address entry = __ pc();
62
63 // Note: There should be a minimal interpreter frame set up when stack
64 // overflow occurs since we check explicitly for it now.
65 //
66 #ifdef ASSERT
67 { Label L;
68 __ lea(rax, Address(rbp,
69 frame::interpreter_frame_monitor_block_top_offset * wordSize));
70 __ cmpptr(rax, rsp); // rax, = maximal rsp for current rbp,
71 // (stack grows negative)
72 __ jcc(Assembler::aboveEqual, L); // check if frame is complete
73 __ stop ("interpreter frame not set up");
74 __ bind(L);
75 }
76 #endif // ASSERT
77 // Restore bcp under the assumption that the current frame is still
78 // interpreted
79 __ restore_bcp();
80
81 // expression stack must be empty before entering the VM if an exception
82 // happened
83 __ empty_expression_stack();
84 __ empty_FPU_stack();
85 // throw exception
86 __ call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::throw_StackOverflowError));
87 return entry;
88 }
89
90 address TemplateInterpreterGenerator::generate_ArrayIndexOutOfBounds_handler(const char* name) {
91 address entry = __ pc();
92 // expression stack must be empty before entering the VM if an exception happened
93 __ empty_expression_stack();
94 __ empty_FPU_stack();
95 // setup parameters
96 // ??? convention: expect aberrant index in register rbx,
97 __ lea(rax, ExternalAddress((address)name));
98 __ call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::throw_ArrayIndexOutOfBoundsException), rax, rbx);
99 return entry;
100 }
101
102 address TemplateInterpreterGenerator::generate_ClassCastException_handler() {
103 address entry = __ pc();
104 // object is at TOS
105 __ pop(rax);
106 // expression stack must be empty before entering the VM if an exception
107 // happened
108 __ empty_expression_stack();
109 __ empty_FPU_stack();
110 __ call_VM(noreg,
111 CAST_FROM_FN_PTR(address,
112 InterpreterRuntime::throw_ClassCastException),
113 rax);
114 return entry;
115 }
116
117 address TemplateInterpreterGenerator::generate_exception_handler_common(const char* name, const char* message, bool pass_oop) {
118 assert(!pass_oop || message == NULL, "either oop or message but not both");
119 address entry = __ pc();
120 if (pass_oop) {
121 // object is at TOS
122 __ pop(rbx);
123 }
124 // expression stack must be empty before entering the VM if an exception happened
125 __ empty_expression_stack();
126 __ empty_FPU_stack();
127 // setup parameters
128 __ lea(rax, ExternalAddress((address)name));
129 if (pass_oop) {
130 __ call_VM(rax, CAST_FROM_FN_PTR(address, InterpreterRuntime::create_klass_exception), rax, rbx);
131 } else {
132 if (message != NULL) {
133 __ lea(rbx, ExternalAddress((address)message));
134 } else {
135 __ movptr(rbx, NULL_WORD);
136 }
137 __ call_VM(rax, CAST_FROM_FN_PTR(address, InterpreterRuntime::create_exception), rax, rbx);
138 }
139 // throw exception
140 __ jump(ExternalAddress(Interpreter::throw_exception_entry()));
141 return entry;
142 }
143
144
145 address TemplateInterpreterGenerator::generate_continuation_for(TosState state) {
146 address entry = __ pc();
147 // NULL last_sp until next java call
148 __ movptr(Address(rbp, frame::interpreter_frame_last_sp_offset * wordSize), NULL_WORD);
149 __ dispatch_next(state);
150 return entry;
151 }
152
153
154 address TemplateInterpreterGenerator::generate_return_entry_for(TosState state, int step, size_t index_size) {
155 address entry = __ pc();
156
157 #ifdef COMPILER2
158 // The FPU stack is clean if UseSSE >= 2 but must be cleaned in other cases
159 if ((state == ftos && UseSSE < 1) || (state == dtos && UseSSE < 2)) {
160 for (int i = 1; i < 8; i++) {
161 __ ffree(i);
162 }
163 } else if (UseSSE < 2) {
164 __ empty_FPU_stack();
165 }
166 #endif
167 if ((state == ftos && UseSSE < 1) || (state == dtos && UseSSE < 2)) {
168 __ MacroAssembler::verify_FPU(1, "generate_return_entry_for compiled");
169 } else {
170 __ MacroAssembler::verify_FPU(0, "generate_return_entry_for compiled");
171 }
172
173 if (state == ftos) {
174 __ MacroAssembler::verify_FPU(UseSSE >= 1 ? 0 : 1, "generate_return_entry_for in interpreter");
175 } else if (state == dtos) {
176 __ MacroAssembler::verify_FPU(UseSSE >= 2 ? 0 : 1, "generate_return_entry_for in interpreter");
177 }
178
179 // Restore stack bottom in case i2c adjusted stack
180 __ movptr(rsp, Address(rbp, frame::interpreter_frame_last_sp_offset * wordSize));
181 // and NULL it as marker that rsp is now tos until next java call
182 __ movptr(Address(rbp, frame::interpreter_frame_last_sp_offset * wordSize), NULL_WORD);
183
184 __ restore_bcp();
185 __ restore_locals();
186
187 if (state == atos) {
188 Register mdp = rbx;
189 Register tmp = rcx;
190 __ profile_return_type(mdp, rax, tmp);
191 }
192
193 const Register cache = rbx;
194 const Register index = rcx;
195 __ get_cache_and_index_at_bcp(cache, index, 1, index_size);
196
197 const Register flags = cache;
198 __ movl(flags, Address(cache, index, Address::times_ptr, ConstantPoolCache::base_offset() + ConstantPoolCacheEntry::flags_offset()));
199 __ andl(flags, ConstantPoolCacheEntry::parameter_size_mask);
200 __ lea(rsp, Address(rsp, flags, Interpreter::stackElementScale()));
201 __ dispatch_next(state, step);
202
203 return entry;
204 }
205
206
207 address TemplateInterpreterGenerator::generate_deopt_entry_for(TosState state, int step) {
208 address entry = __ pc();
209
210 if (state == ftos) {
211 __ MacroAssembler::verify_FPU(UseSSE >= 1 ? 0 : 1, "generate_deopt_entry_for in interpreter");
212 } else if (state == dtos) {
213 __ MacroAssembler::verify_FPU(UseSSE >= 2 ? 0 : 1, "generate_deopt_entry_for in interpreter");
214 }
215
216 // The stack is not extended by deopt but we must NULL last_sp as this
217 // entry is like a "return".
218 __ movptr(Address(rbp, frame::interpreter_frame_last_sp_offset * wordSize), NULL_WORD);
219 __ restore_bcp();
220 __ restore_locals();
221 // handle exceptions
222 { Label L;
223 const Register thread = rcx;
224 __ get_thread(thread);
225 __ cmpptr(Address(thread, Thread::pending_exception_offset()), (int32_t)NULL_WORD);
226 __ jcc(Assembler::zero, L);
227 __ call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::throw_pending_exception));
228 __ should_not_reach_here();
229 __ bind(L);
230 }
231 __ dispatch_next(state, step);
232 return entry;
233 }
234
235
236 int AbstractInterpreter::BasicType_as_index(BasicType type) {
237 int i = 0;
238 switch (type) {
239 case T_BOOLEAN: i = 0; break;
240 case T_CHAR : i = 1; break;
241 case T_BYTE : i = 2; break;
242 case T_SHORT : i = 3; break;
243 case T_INT : // fall through
244 case T_LONG : // fall through
245 case T_VOID : i = 4; break;
246 case T_FLOAT : i = 5; break; // have to treat float and double separately for SSE
247 case T_DOUBLE : i = 6; break;
248 case T_OBJECT : // fall through
249 case T_ARRAY : i = 7; break;
250 default : ShouldNotReachHere();
251 }
252 assert(0 <= i && i < AbstractInterpreter::number_of_result_handlers, "index out of bounds");
253 return i;
254 }
255
256
257 address TemplateInterpreterGenerator::generate_result_handler_for(BasicType type) {
258 address entry = __ pc();
259 switch (type) {
260 case T_BOOLEAN: __ c2bool(rax); break;
261 case T_CHAR : __ andptr(rax, 0xFFFF); break;
262 case T_BYTE : __ sign_extend_byte (rax); break;
263 case T_SHORT : __ sign_extend_short(rax); break;
264 case T_INT : /* nothing to do */ break;
265 case T_LONG : /* nothing to do */ break;
266 case T_VOID : /* nothing to do */ break;
267 case T_DOUBLE :
268 case T_FLOAT :
269 { const Register t = InterpreterRuntime::SignatureHandlerGenerator::temp();
270 __ pop(t); // remove return address first
271 // Must return a result for interpreter or compiler. In SSE
272 // mode, results are returned in xmm0 and the FPU stack must
273 // be empty.
274 if (type == T_FLOAT && UseSSE >= 1) {
275 // Load ST0
276 __ fld_d(Address(rsp, 0));
277 // Store as float and empty fpu stack
278 __ fstp_s(Address(rsp, 0));
279 // and reload
280 __ movflt(xmm0, Address(rsp, 0));
281 } else if (type == T_DOUBLE && UseSSE >= 2 ) {
282 __ movdbl(xmm0, Address(rsp, 0));
283 } else {
284 // restore ST0
285 __ fld_d(Address(rsp, 0));
286 }
287 // and pop the temp
288 __ addptr(rsp, 2 * wordSize);
289 __ push(t); // restore return address
290 }
291 break;
292 case T_OBJECT :
293 // retrieve result from frame
294 __ movptr(rax, Address(rbp, frame::interpreter_frame_oop_temp_offset*wordSize));
295 // and verify it
296 __ verify_oop(rax);
297 break;
298 default : ShouldNotReachHere();
299 }
300 __ ret(0); // return from result handler
301 return entry;
302 }
303
304 address TemplateInterpreterGenerator::generate_safept_entry_for(TosState state, address runtime_entry) {
305 address entry = __ pc();
306 __ push(state);
307 __ call_VM(noreg, runtime_entry);
308 __ dispatch_via(vtos, Interpreter::_normal_table.table_for(vtos));
309 return entry;
310 }
311
312
313 // Helpers for commoning out cases in the various type of method entries.
314 //
315
316 // increment invocation count & check for overflow
317 //
318 // Note: checking for negative value instead of overflow
319 // so we have a 'sticky' overflow test
320 //
321 // rbx,: method
322 // rcx: invocation counter
323 //
324 void InterpreterGenerator::generate_counter_incr(Label* overflow, Label* profile_method, Label* profile_method_continue) {
325 Label done;
326 // Note: In tiered we increment either counters in MethodCounters* or in MDO
327 // depending if we're profiling or not.
328 if (TieredCompilation) {
329 int increment = InvocationCounter::count_increment;
330 Label no_mdo;
331 if (ProfileInterpreter) {
332 // Are we profiling?
333 __ movptr(rax, Address(rbx, Method::method_data_offset()));
334 __ testptr(rax, rax);
335 __ jccb(Assembler::zero, no_mdo);
336 // Increment counter in the MDO
337 const Address mdo_invocation_counter(rax, in_bytes(MethodData::invocation_counter_offset()) +
338 in_bytes(InvocationCounter::counter_offset()));
339 const Address mask(rax, in_bytes(MethodData::invoke_mask_offset()));
340 __ increment_mask_and_jump(mdo_invocation_counter, increment, mask, rcx, false, Assembler::zero, overflow);
341 __ jmp(done);
342 }
343 __ bind(no_mdo);
344 // Increment counter in MethodCounters
345 const Address invocation_counter(rax,
346 MethodCounters::invocation_counter_offset() +
347 InvocationCounter::counter_offset());
348
349 __ get_method_counters(rbx, rax, done);
350 const Address mask(rax, in_bytes(MethodCounters::invoke_mask_offset()));
351 __ increment_mask_and_jump(invocation_counter, increment, mask,
352 rcx, false, Assembler::zero, overflow);
353 __ bind(done);
354 } else { // not TieredCompilation
355 const Address backedge_counter(rax,
356 MethodCounters::backedge_counter_offset() +
357 InvocationCounter::counter_offset());
358 const Address invocation_counter(rax,
359 MethodCounters::invocation_counter_offset() +
360 InvocationCounter::counter_offset());
361
362 __ get_method_counters(rbx, rax, done);
363
364 if (ProfileInterpreter) {
365 __ incrementl(Address(rax,
366 MethodCounters::interpreter_invocation_counter_offset()));
367 }
368
369 // Update standard invocation counters
370 __ movl(rcx, invocation_counter);
371 __ incrementl(rcx, InvocationCounter::count_increment);
372 __ movl(invocation_counter, rcx); // save invocation count
373
374 __ movl(rax, backedge_counter); // load backedge counter
375 __ andl(rax, InvocationCounter::count_mask_value); // mask out the status bits
376
377 __ addl(rcx, rax); // add both counters
378
379 // profile_method is non-null only for interpreted method so
380 // profile_method != NULL == !native_call
381 // BytecodeInterpreter only calls for native so code is elided.
382
383 if (ProfileInterpreter && profile_method != NULL) {
384 // Test to see if we should create a method data oop
385 __ movptr(rax, Address(rbx, Method::method_counters_offset()));
386 __ cmp32(rcx, Address(rax, in_bytes(MethodCounters::interpreter_profile_limit_offset())));
387 __ jcc(Assembler::less, *profile_method_continue);
388
389 // if no method data exists, go to profile_method
390 __ test_method_data_pointer(rax, *profile_method);
391 }
392
393 __ movptr(rax, Address(rbx, Method::method_counters_offset()));
394 __ cmp32(rcx, Address(rax, in_bytes(MethodCounters::interpreter_invocation_limit_offset())));
395 __ jcc(Assembler::aboveEqual, *overflow);
396 __ bind(done);
397 }
398 }
399
400 void InterpreterGenerator::generate_counter_overflow(Label* do_continue) {
401
402 // Asm interpreter on entry
403 // rdi - locals
404 // rsi - bcp
405 // rbx, - method
406 // rdx - cpool
407 // rbp, - interpreter frame
408
409 // C++ interpreter on entry
410 // rsi - new interpreter state pointer
411 // rbp - interpreter frame pointer
412 // rbx - method
413
414 // On return (i.e. jump to entry_point) [ back to invocation of interpreter ]
415 // rbx, - method
416 // rcx - rcvr (assuming there is one)
417 // top of stack return address of interpreter caller
418 // rsp - sender_sp
419
420 // C++ interpreter only
421 // rsi - previous interpreter state pointer
422
423 // InterpreterRuntime::frequency_counter_overflow takes one argument
424 // indicating if the counter overflow occurs at a backwards branch (non-NULL bcp).
425 // The call returns the address of the verified entry point for the method or NULL
426 // if the compilation did not complete (either went background or bailed out).
427 __ movptr(rax, (intptr_t)false);
428 __ call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::frequency_counter_overflow), rax);
429
430 __ movptr(rbx, Address(rbp, method_offset)); // restore Method*
431
432 // Preserve invariant that rsi/rdi contain bcp/locals of sender frame
433 // and jump to the interpreted entry.
434 __ jmp(*do_continue, relocInfo::none);
435
436 }
437
438 void InterpreterGenerator::generate_stack_overflow_check(void) {
439 // see if we've got enough room on the stack for locals plus overhead.
440 // the expression stack grows down incrementally, so the normal guard
441 // page mechanism will work for that.
442 //
443 // Registers live on entry:
444 //
445 // Asm interpreter
446 // rdx: number of additional locals this frame needs (what we must check)
447 // rbx,: Method*
448
449 // destroyed on exit
450 // rax,
451
452 // NOTE: since the additional locals are also always pushed (wasn't obvious in
453 // generate_fixed_frame) so the guard should work for them too.
454 //
455
456 // monitor entry size: see picture of stack in frame_x86.hpp
457 const int entry_size = frame::interpreter_frame_monitor_size() * wordSize;
458
459 // total overhead size: entry_size + (saved rbp, thru expr stack bottom).
460 // be sure to change this if you add/subtract anything to/from the overhead area
461 const int overhead_size = -(frame::interpreter_frame_initial_sp_offset*wordSize) + entry_size;
462
463 const int page_size = os::vm_page_size();
464
465 Label after_frame_check;
466
467 // see if the frame is greater than one page in size. If so,
468 // then we need to verify there is enough stack space remaining
469 // for the additional locals.
470 __ cmpl(rdx, (page_size - overhead_size)/Interpreter::stackElementSize);
471 __ jcc(Assembler::belowEqual, after_frame_check);
472
473 // compute rsp as if this were going to be the last frame on
474 // the stack before the red zone
475
476 Label after_frame_check_pop;
477
478 __ push(rsi);
479
480 const Register thread = rsi;
481
482 __ get_thread(thread);
483
484 const Address stack_base(thread, Thread::stack_base_offset());
485 const Address stack_size(thread, Thread::stack_size_offset());
486
487 // locals + overhead, in bytes
488 __ lea(rax, Address(noreg, rdx, Interpreter::stackElementScale(), overhead_size));
489
490 #ifdef ASSERT
491 Label stack_base_okay, stack_size_okay;
492 // verify that thread stack base is non-zero
493 __ cmpptr(stack_base, (int32_t)NULL_WORD);
494 __ jcc(Assembler::notEqual, stack_base_okay);
495 __ stop("stack base is zero");
496 __ bind(stack_base_okay);
497 // verify that thread stack size is non-zero
498 __ cmpptr(stack_size, 0);
499 __ jcc(Assembler::notEqual, stack_size_okay);
500 __ stop("stack size is zero");
501 __ bind(stack_size_okay);
502 #endif
503
504 // Add stack base to locals and subtract stack size
505 __ addptr(rax, stack_base);
506 __ subptr(rax, stack_size);
507
508 // Use the maximum number of pages we might bang.
509 const int max_pages = StackShadowPages > (StackRedPages+StackYellowPages) ? StackShadowPages :
510 (StackRedPages+StackYellowPages);
511 __ addptr(rax, max_pages * page_size);
512
513 // check against the current stack bottom
514 __ cmpptr(rsp, rax);
515 __ jcc(Assembler::above, after_frame_check_pop);
516
517 __ pop(rsi); // get saved bcp / (c++ prev state ).
518
519 // Restore sender's sp as SP. This is necessary if the sender's
520 // frame is an extended compiled frame (see gen_c2i_adapter())
521 // and safer anyway in case of JSR292 adaptations.
522
523 __ pop(rax); // return address must be moved if SP is changed
524 __ mov(rsp, rsi);
525 __ push(rax);
526
527 // Note: the restored frame is not necessarily interpreted.
528 // Use the shared runtime version of the StackOverflowError.
529 assert(StubRoutines::throw_StackOverflowError_entry() != NULL, "stub not yet generated");
530 __ jump(ExternalAddress(StubRoutines::throw_StackOverflowError_entry()));
531 // all done with frame size check
532 __ bind(after_frame_check_pop);
533 __ pop(rsi);
534
535 __ bind(after_frame_check);
536 }
537
538 // Allocate monitor and lock method (asm interpreter)
539 // rbx, - Method*
540 //
541 void TemplateInterpreterGenerator::lock_method() {
542 // synchronize method
543 const Address access_flags (rbx, Method::access_flags_offset());
544 const Address monitor_block_top (rbp, frame::interpreter_frame_monitor_block_top_offset * wordSize);
545 const int entry_size = frame::interpreter_frame_monitor_size() * wordSize;
546
547 #ifdef ASSERT
548 { Label L;
549 __ movl(rax, access_flags);
550 __ testl(rax, JVM_ACC_SYNCHRONIZED);
551 __ jcc(Assembler::notZero, L);
552 __ stop("method doesn't need synchronization");
553 __ bind(L);
554 }
555 #endif // ASSERT
556 // get synchronization object
557 { Label done;
558 const int mirror_offset = in_bytes(Klass::java_mirror_offset());
559 __ movl(rax, access_flags);
560 __ testl(rax, JVM_ACC_STATIC);
561 __ movptr(rax, Address(rdi, Interpreter::local_offset_in_bytes(0))); // get receiver (assume this is frequent case)
562 __ jcc(Assembler::zero, done);
563 __ movptr(rax, Address(rbx, Method::const_offset()));
564 __ movptr(rax, Address(rax, ConstMethod::constants_offset()));
565 __ movptr(rax, Address(rax, ConstantPool::pool_holder_offset_in_bytes()));
566 __ movptr(rax, Address(rax, mirror_offset));
567 __ bind(done);
568 }
569 // add space for monitor & lock
570 __ subptr(rsp, entry_size); // add space for a monitor entry
571 __ movptr(monitor_block_top, rsp); // set new monitor block top
572 __ movptr(Address(rsp, BasicObjectLock::obj_offset_in_bytes()), rax); // store object
573 __ mov(rdx, rsp); // object address
574 __ lock_object(rdx);
575 }
576
577 //
578 // Generate a fixed interpreter frame. This is identical setup for interpreted methods
579 // and for native methods hence the shared code.
580
581 void TemplateInterpreterGenerator::generate_fixed_frame(bool native_call) {
582 // initialize fixed part of activation frame
583 __ push(rax); // save return address
584 __ enter(); // save old & set new rbp,
585
586
587 __ push(rsi); // set sender sp
588 __ push((int32_t)NULL_WORD); // leave last_sp as null
589 __ movptr(rsi, Address(rbx,Method::const_offset())); // get ConstMethod*
590 __ lea(rsi, Address(rsi,ConstMethod::codes_offset())); // get codebase
591 __ push(rbx); // save Method*
592 if (ProfileInterpreter) {
593 Label method_data_continue;
594 __ movptr(rdx, Address(rbx, in_bytes(Method::method_data_offset())));
595 __ testptr(rdx, rdx);
596 __ jcc(Assembler::zero, method_data_continue);
597 __ addptr(rdx, in_bytes(MethodData::data_offset()));
598 __ bind(method_data_continue);
599 __ push(rdx); // set the mdp (method data pointer)
600 } else {
601 __ push(0);
602 }
603
604 __ movptr(rdx, Address(rbx, Method::const_offset()));
605 __ movptr(rdx, Address(rdx, ConstMethod::constants_offset()));
606 __ movptr(rdx, Address(rdx, ConstantPool::cache_offset_in_bytes()));
607 __ push(rdx); // set constant pool cache
608 __ push(rdi); // set locals pointer
609 if (native_call) {
610 __ push(0); // no bcp
611 } else {
612 __ push(rsi); // set bcp
613 }
614 __ push(0); // reserve word for pointer to expression stack bottom
615 __ movptr(Address(rsp, 0), rsp); // set expression stack bottom
616 }
617
618
619 // Method entry for java.lang.ref.Reference.get.
620 address InterpreterGenerator::generate_Reference_get_entry(void) {
621 #if INCLUDE_ALL_GCS
622 // Code: _aload_0, _getfield, _areturn
623 // parameter size = 1
624 //
625 // The code that gets generated by this routine is split into 2 parts:
626 // 1. The "intrinsified" code for G1 (or any SATB based GC),
627 // 2. The slow path - which is an expansion of the regular method entry.
628 //
629 // Notes:-
630 // * In the G1 code we do not check whether we need to block for
631 // a safepoint. If G1 is enabled then we must execute the specialized
632 // code for Reference.get (except when the Reference object is null)
633 // so that we can log the value in the referent field with an SATB
634 // update buffer.
635 // If the code for the getfield template is modified so that the
636 // G1 pre-barrier code is executed when the current method is
637 // Reference.get() then going through the normal method entry
638 // will be fine.
639 // * The G1 code below can, however, check the receiver object (the instance
640 // of java.lang.Reference) and jump to the slow path if null. If the
641 // Reference object is null then we obviously cannot fetch the referent
642 // and so we don't need to call the G1 pre-barrier. Thus we can use the
643 // regular method entry code to generate the NPE.
644 //
645 // This code is based on generate_accessor_enty.
646
647 // rbx,: Method*
648 // rcx: receiver (preserve for slow entry into asm interpreter)
649
650 // rsi: senderSP must preserved for slow path, set SP to it on fast path
651
652 address entry = __ pc();
653
654 const int referent_offset = java_lang_ref_Reference::referent_offset;
655 guarantee(referent_offset > 0, "referent offset not initialized");
656
657 if (UseG1GC) {
658 Label slow_path;
659
660 // Check if local 0 != NULL
661 // If the receiver is null then it is OK to jump to the slow path.
662 __ movptr(rax, Address(rsp, wordSize));
663 __ testptr(rax, rax);
664 __ jcc(Assembler::zero, slow_path);
665
666 // rax: local 0 (must be preserved across the G1 barrier call)
667 //
668 // rbx: method (at this point it's scratch)
669 // rcx: receiver (at this point it's scratch)
670 // rdx: scratch
671 // rdi: scratch
672 //
673 // rsi: sender sp
674
675 // Preserve the sender sp in case the pre-barrier
676 // calls the runtime
677 __ push(rsi);
678
679 // Load the value of the referent field.
680 const Address field_address(rax, referent_offset);
681 __ movptr(rax, field_address);
682
683 // Generate the G1 pre-barrier code to log the value of
684 // the referent field in an SATB buffer.
685 __ get_thread(rcx);
686 __ g1_write_barrier_pre(noreg /* obj */,
687 rax /* pre_val */,
688 rcx /* thread */,
689 rbx /* tmp */,
690 true /* tosca_save */,
691 true /* expand_call */);
692
693 // _areturn
694 __ pop(rsi); // get sender sp
695 __ pop(rdi); // get return address
696 __ mov(rsp, rsi); // set sp to sender sp
697 __ jmp(rdi);
698
699 __ bind(slow_path);
700 __ jump_to_entry(Interpreter::entry_for_kind(Interpreter::zerolocals));
701 return entry;
702 }
703 #endif // INCLUDE_ALL_GCS
704
705 // If G1 is not enabled then attempt to go through the accessor entry point
706 // Reference.get is an accessor
707 return NULL;
708 }
709
710 /**
711 * Method entry for static native methods:
712 * int java.util.zip.CRC32.update(int crc, int b)
713 */
714 address InterpreterGenerator::generate_CRC32_update_entry() {
715 if (UseCRC32Intrinsics) {
716 address entry = __ pc();
717
718 // rbx: Method*
719 // rsi: senderSP must preserved for slow path, set SP to it on fast path
720 // rdx: scratch
721 // rdi: scratch
722
723 Label slow_path;
724 // If we need a safepoint check, generate full interpreter entry.
725 ExternalAddress state(SafepointSynchronize::address_of_state());
726 __ cmp32(ExternalAddress(SafepointSynchronize::address_of_state()),
727 SafepointSynchronize::_not_synchronized);
728 __ jcc(Assembler::notEqual, slow_path);
729
730 // We don't generate local frame and don't align stack because
731 // we call stub code and there is no safepoint on this path.
732
733 // Load parameters
734 const Register crc = rax; // crc
735 const Register val = rdx; // source java byte value
736 const Register tbl = rdi; // scratch
737
738 // Arguments are reversed on java expression stack
739 __ movl(val, Address(rsp, wordSize)); // byte value
740 __ movl(crc, Address(rsp, 2*wordSize)); // Initial CRC
741
742 __ lea(tbl, ExternalAddress(StubRoutines::crc_table_addr()));
743 __ notl(crc); // ~crc
744 __ update_byte_crc32(crc, val, tbl);
745 __ notl(crc); // ~crc
746 // result in rax
747
748 // _areturn
749 __ pop(rdi); // get return address
750 __ mov(rsp, rsi); // set sp to sender sp
751 __ jmp(rdi);
752
753 // generate a vanilla native entry as the slow path
754 __ bind(slow_path);
755 __ jump_to_entry(Interpreter::entry_for_kind(Interpreter::native));
756 return entry;
757 }
758 return NULL;
759 }
760
761 /**
762 * Method entry for static native methods:
763 * int java.util.zip.CRC32.updateBytes(int crc, byte[] b, int off, int len)
764 * int java.util.zip.CRC32.updateByteBuffer(int crc, long buf, int off, int len)
765 */
766 address InterpreterGenerator::generate_CRC32_updateBytes_entry(AbstractInterpreter::MethodKind kind) {
767 if (UseCRC32Intrinsics) {
768 address entry = __ pc();
769
770 // rbx,: Method*
771 // rsi: senderSP must preserved for slow path, set SP to it on fast path
772 // rdx: scratch
773 // rdi: scratch
774
775 Label slow_path;
776 // If we need a safepoint check, generate full interpreter entry.
777 ExternalAddress state(SafepointSynchronize::address_of_state());
778 __ cmp32(ExternalAddress(SafepointSynchronize::address_of_state()),
779 SafepointSynchronize::_not_synchronized);
780 __ jcc(Assembler::notEqual, slow_path);
781
782 // We don't generate local frame and don't align stack because
783 // we call stub code and there is no safepoint on this path.
784
785 // Load parameters
786 const Register crc = rax; // crc
787 const Register buf = rdx; // source java byte array address
788 const Register len = rdi; // length
789
790 // value x86_32
791 // interp. arg ptr ESP + 4
792 // int java.util.zip.CRC32.updateBytes(int crc, byte[] b, int off, int len)
793 // 3 2 1 0
794 // int java.util.zip.CRC32.updateByteBuffer(int crc, long buf, int off, int len)
795 // 4 2,3 1 0
796
797 // Arguments are reversed on java expression stack
798 __ movl(len, Address(rsp, 4 + 0)); // Length
799 // Calculate address of start element
800 if (kind == Interpreter::java_util_zip_CRC32_updateByteBuffer) {
801 __ movptr(buf, Address(rsp, 4 + 2 * wordSize)); // long buf
802 __ addptr(buf, Address(rsp, 4 + 1 * wordSize)); // + offset
803 __ movl(crc, Address(rsp, 4 + 4 * wordSize)); // Initial CRC
804 } else {
805 __ movptr(buf, Address(rsp, 4 + 2 * wordSize)); // byte[] array
806 __ addptr(buf, arrayOopDesc::base_offset_in_bytes(T_BYTE)); // + header size
807 __ addptr(buf, Address(rsp, 4 + 1 * wordSize)); // + offset
808 __ movl(crc, Address(rsp, 4 + 3 * wordSize)); // Initial CRC
809 }
810
811 __ super_call_VM_leaf(CAST_FROM_FN_PTR(address, StubRoutines::updateBytesCRC32()), crc, buf, len);
812 // result in rax
813
814 // _areturn
815 __ pop(rdi); // get return address
816 __ mov(rsp, rsi); // set sp to sender sp
817 __ jmp(rdi);
818
819 // generate a vanilla native entry as the slow path
820 __ bind(slow_path);
821 __ jump_to_entry(Interpreter::entry_for_kind(Interpreter::native));
822 return entry;
823 }
824 return NULL;
825 }
826
827 /**
828 * Method entry for static native methods:
829 * int java.util.zip.CRC32C.updateBytes(int crc, byte[] b, int off, int end)
830 * int java.util.zip.CRC32C.updateByteBuffer(int crc, long address, int off, int end)
831 */
832 address InterpreterGenerator::generate_CRC32C_updateBytes_entry(AbstractInterpreter::MethodKind kind) {
833 if (UseCRC32CIntrinsics) {
834 address entry = __ pc();
835 // Load parameters
836 const Register crc = rax; // crc
837 const Register buf = rcx; // source java byte array address
838 const Register len = rdx; // length
839 const Register end = len;
840
841 // value x86_32
842 // interp. arg ptr ESP + 4
843 // int java.util.zip.CRC32.updateBytes(int crc, byte[] b, int off, int end)
844 // 3 2 1 0
845 // int java.util.zip.CRC32.updateByteBuffer(int crc, long address, int off, int end)
846 // 4 2,3 1 0
847
848 // Arguments are reversed on java expression stack
849 __ movl(end, Address(rsp, 4 + 0)); // end
850 __ subl(len, Address(rsp, 4 + 1 * wordSize)); // end - offset == length
851 // Calculate address of start element
852 if (kind == Interpreter::java_util_zip_CRC32_updateByteBuffer) {
853 __ movptr(buf, Address(rsp, 4 + 2 * wordSize)); // long address
854 __ addptr(buf, Address(rsp, 4 + 1 * wordSize)); // + offset
855 __ movl(crc, Address(rsp, 4 + 4 * wordSize)); // Initial CRC
856 } else {
857 __ movptr(buf, Address(rsp, 4 + 2 * wordSize)); // byte[] array
858 __ addptr(buf, arrayOopDesc::base_offset_in_bytes(T_BYTE)); // + header size
859 __ addptr(buf, Address(rsp, 4 + 1 * wordSize)); // + offset
860 __ movl(crc, Address(rsp, 4 + 3 * wordSize)); // Initial CRC
861 }
862 __ super_call_VM_leaf(CAST_FROM_FN_PTR(address, StubRoutines::updateBytesCRC32C()), crc, buf, len);
863 // result in rax
864 // _areturn
865 __ pop(rdi); // get return address
866 __ mov(rsp, rsi); // set sp to sender sp
867 __ jmp(rdi);
868
869 return entry;
870 }
871 return NULL;
872 }
873
874 /**
875 * Method entry for static native method:
876 * java.lang.Float.intBitsToFloat(int bits)
877 */
878 address InterpreterGenerator::generate_Float_intBitsToFloat_entry() {
879 if (UseSSE >= 1) {
880 address entry = __ pc();
881
882 // rsi: the sender's SP
883
884 // Skip safepoint check (compiler intrinsic versions of this method
885 // do not perform safepoint checks either).
886
887 // Load 'bits' into xmm0 (interpreter returns results in xmm0)
888 __ movflt(xmm0, Address(rsp, wordSize));
889
890 // Return
891 __ pop(rdi); // get return address
892 __ mov(rsp, rsi); // set rsp to the sender's SP
893 __ jmp(rdi);
894 return entry;
895 }
896
897 return NULL;
898 }
899
900 /**
901 * Method entry for static native method:
902 * java.lang.Float.floatToRawIntBits(float value)
903 */
904 address InterpreterGenerator::generate_Float_floatToRawIntBits_entry() {
905 if (UseSSE >= 1) {
906 address entry = __ pc();
907
908 // rsi: the sender's SP
909
910 // Skip safepoint check (compiler intrinsic versions of this method
911 // do not perform safepoint checks either).
912
913 // Load the parameter (a floating-point value) into rax.
914 __ movl(rax, Address(rsp, wordSize));
915
916 // Return
917 __ pop(rdi); // get return address
918 __ mov(rsp, rsi); // set rsp to the sender's SP
919 __ jmp(rdi);
920 return entry;
921 }
922
923 return NULL;
924 }
925
926
927 /**
928 * Method entry for static native method:
929 * java.lang.Double.longBitsToDouble(long bits)
930 */
931 address InterpreterGenerator::generate_Double_longBitsToDouble_entry() {
932 if (UseSSE >= 2) {
933 address entry = __ pc();
934
935 // rsi: the sender's SP
936
937 // Skip safepoint check (compiler intrinsic versions of this method
938 // do not perform safepoint checks either).
939
940 // Load 'bits' into xmm0 (interpreter returns results in xmm0)
941 __ movdbl(xmm0, Address(rsp, wordSize));
942
943 // Return
944 __ pop(rdi); // get return address
945 __ mov(rsp, rsi); // set rsp to the sender's SP
946 __ jmp(rdi);
947 return entry;
948 }
949
950 return NULL;
951 }
952
953 /**
954 * Method entry for static native method:
955 * java.lang.Double.doubleToRawLongBits(double value)
956 */
957 address InterpreterGenerator::generate_Double_doubleToRawLongBits_entry() {
958 if (UseSSE >= 2) {
959 address entry = __ pc();
960
961 // rsi: the sender's SP
962
963 // Skip safepoint check (compiler intrinsic versions of this method
964 // do not perform safepoint checks either).
965
966 // Load the parameter (a floating-point value) into rax.
967 __ movl(rdx, Address(rsp, 2*wordSize));
968 __ movl(rax, Address(rsp, wordSize));
969
970 // Return
971 __ pop(rdi); // get return address
972 __ mov(rsp, rsi); // set rsp to the sender's SP
973 __ jmp(rdi);
974 return entry;
975 }
976
977 return NULL;
978 }
979
980 //
981 // Interpreter stub for calling a native method. (asm interpreter)
982 // This sets up a somewhat different looking stack for calling the native method
983 // than the typical interpreter frame setup.
984 //
985
986 address InterpreterGenerator::generate_native_entry(bool synchronized) {
987 // determine code generation flags
988 bool inc_counter = UseCompiler || CountCompiledCalls || LogTouchedMethods;
989
990 // rbx,: Method*
991 // rsi: sender sp
992 // rsi: previous interpreter state (C++ interpreter) must preserve
993 address entry_point = __ pc();
994
995 const Address constMethod (rbx, Method::const_offset());
996 const Address access_flags (rbx, Method::access_flags_offset());
997 const Address size_of_parameters(rcx, ConstMethod::size_of_parameters_offset());
998
999 // get parameter size (always needed)
1000 __ movptr(rcx, constMethod);
1001 __ load_unsigned_short(rcx, size_of_parameters);
1002
1003 // native calls don't need the stack size check since they have no expression stack
1004 // and the arguments are already on the stack and we only add a handful of words
1005 // to the stack
1006
1007 // rbx,: Method*
1008 // rcx: size of parameters
1009 // rsi: sender sp
1010
1011 __ pop(rax); // get return address
1012 // for natives the size of locals is zero
1013
1014 // compute beginning of parameters (rdi)
1015 __ lea(rdi, Address(rsp, rcx, Interpreter::stackElementScale(), -wordSize));
1016
1017
1018 // add 2 zero-initialized slots for native calls
1019 // NULL result handler
1020 __ push((int32_t)NULL_WORD);
1021 // NULL oop temp (mirror or jni oop result)
1022 __ push((int32_t)NULL_WORD);
1023
1024 // initialize fixed part of activation frame
1025 generate_fixed_frame(true);
1026
1027 // make sure method is native & not abstract
1028 #ifdef ASSERT
1029 __ movl(rax, access_flags);
1030 {
1031 Label L;
1032 __ testl(rax, JVM_ACC_NATIVE);
1033 __ jcc(Assembler::notZero, L);
1034 __ stop("tried to execute non-native method as native");
1035 __ bind(L);
1036 }
1037 { Label L;
1038 __ testl(rax, JVM_ACC_ABSTRACT);
1039 __ jcc(Assembler::zero, L);
1040 __ stop("tried to execute abstract method in interpreter");
1041 __ bind(L);
1042 }
1043 #endif
1044
1045 // Since at this point in the method invocation the exception handler
1046 // would try to exit the monitor of synchronized methods which hasn't
1047 // been entered yet, we set the thread local variable
1048 // _do_not_unlock_if_synchronized to true. The remove_activation will
1049 // check this flag.
1050
1051 __ get_thread(rax);
1052 const Address do_not_unlock_if_synchronized(rax,
1053 in_bytes(JavaThread::do_not_unlock_if_synchronized_offset()));
1054 __ movbool(do_not_unlock_if_synchronized, true);
1055
1056 // increment invocation count & check for overflow
1057 Label invocation_counter_overflow;
1058 if (inc_counter) {
1059 generate_counter_incr(&invocation_counter_overflow, NULL, NULL);
1060 }
1061
1062 Label continue_after_compile;
1063 __ bind(continue_after_compile);
1064
1065 bang_stack_shadow_pages(true);
1066
1067 // reset the _do_not_unlock_if_synchronized flag
1068 __ get_thread(rax);
1069 __ movbool(do_not_unlock_if_synchronized, false);
1070
1071 // check for synchronized methods
1072 // Must happen AFTER invocation_counter check and stack overflow check,
1073 // so method is not locked if overflows.
1074 //
1075 if (synchronized) {
1076 lock_method();
1077 } else {
1078 // no synchronization necessary
1079 #ifdef ASSERT
1080 { Label L;
1081 __ movl(rax, access_flags);
1082 __ testl(rax, JVM_ACC_SYNCHRONIZED);
1083 __ jcc(Assembler::zero, L);
1084 __ stop("method needs synchronization");
1085 __ bind(L);
1086 }
1087 #endif
1088 }
1089
1090 // start execution
1091 #ifdef ASSERT
1092 { Label L;
1093 const Address monitor_block_top (rbp,
1094 frame::interpreter_frame_monitor_block_top_offset * wordSize);
1095 __ movptr(rax, monitor_block_top);
1096 __ cmpptr(rax, rsp);
1097 __ jcc(Assembler::equal, L);
1098 __ stop("broken stack frame setup in interpreter");
1099 __ bind(L);
1100 }
1101 #endif
1102
1103 // jvmti/dtrace support
1104 __ notify_method_entry();
1105
1106 // work registers
1107 const Register method = rbx;
1108 const Register thread = rdi;
1109 const Register t = rcx;
1110
1111 // allocate space for parameters
1112 __ get_method(method);
1113 __ movptr(t, Address(method, Method::const_offset()));
1114 __ load_unsigned_short(t, Address(t, ConstMethod::size_of_parameters_offset()));
1115
1116 __ shlptr(t, Interpreter::logStackElementSize);
1117 __ addptr(t, 2*wordSize); // allocate two more slots for JNIEnv and possible mirror
1118 __ subptr(rsp, t);
1119 __ andptr(rsp, -(StackAlignmentInBytes)); // gcc needs 16 byte aligned stacks to do XMM intrinsics
1120
1121 // get signature handler
1122 { Label L;
1123 __ movptr(t, Address(method, Method::signature_handler_offset()));
1124 __ testptr(t, t);
1125 __ jcc(Assembler::notZero, L);
1126 __ call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::prepare_native_call), method);
1127 __ get_method(method);
1128 __ movptr(t, Address(method, Method::signature_handler_offset()));
1129 __ bind(L);
1130 }
1131
1132 // call signature handler
1133 assert(InterpreterRuntime::SignatureHandlerGenerator::from() == rdi, "adjust this code");
1134 assert(InterpreterRuntime::SignatureHandlerGenerator::to () == rsp, "adjust this code");
1135 assert(InterpreterRuntime::SignatureHandlerGenerator::temp() == t , "adjust this code");
1136 // The generated handlers do not touch RBX (the method oop).
1137 // However, large signatures cannot be cached and are generated
1138 // each time here. The slow-path generator will blow RBX
1139 // sometime, so we must reload it after the call.
1140 __ call(t);
1141 __ get_method(method); // slow path call blows RBX on DevStudio 5.0
1142
1143 // result handler is in rax,
1144 // set result handler
1145 __ movptr(Address(rbp, frame::interpreter_frame_result_handler_offset*wordSize), rax);
1146
1147 // pass mirror handle if static call
1148 { Label L;
1149 const int mirror_offset = in_bytes(Klass::java_mirror_offset());
1150 __ movl(t, Address(method, Method::access_flags_offset()));
1151 __ testl(t, JVM_ACC_STATIC);
1152 __ jcc(Assembler::zero, L);
1153 // get mirror
1154 __ movptr(t, Address(method, Method:: const_offset()));
1155 __ movptr(t, Address(t, ConstMethod::constants_offset()));
1156 __ movptr(t, Address(t, ConstantPool::pool_holder_offset_in_bytes()));
1157 __ movptr(t, Address(t, mirror_offset));
1158 // copy mirror into activation frame
1159 __ movptr(Address(rbp, frame::interpreter_frame_oop_temp_offset * wordSize), t);
1160 // pass handle to mirror
1161 __ lea(t, Address(rbp, frame::interpreter_frame_oop_temp_offset * wordSize));
1162 __ movptr(Address(rsp, wordSize), t);
1163 __ bind(L);
1164 }
1165
1166 // get native function entry point
1167 { Label L;
1168 __ movptr(rax, Address(method, Method::native_function_offset()));
1169 ExternalAddress unsatisfied(SharedRuntime::native_method_throw_unsatisfied_link_error_entry());
1170 __ cmpptr(rax, unsatisfied.addr());
1171 __ jcc(Assembler::notEqual, L);
1172 __ call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::prepare_native_call), method);
1173 __ get_method(method);
1174 __ movptr(rax, Address(method, Method::native_function_offset()));
1175 __ bind(L);
1176 }
1177
1178 // pass JNIEnv
1179 __ get_thread(thread);
1180 __ lea(t, Address(thread, JavaThread::jni_environment_offset()));
1181 __ movptr(Address(rsp, 0), t);
1182
1183 // set_last_Java_frame_before_call
1184 // It is enough that the pc()
1185 // points into the right code segment. It does not have to be the correct return pc.
1186 __ set_last_Java_frame(thread, noreg, rbp, __ pc());
1187
1188 // change thread state
1189 #ifdef ASSERT
1190 { Label L;
1191 __ movl(t, Address(thread, JavaThread::thread_state_offset()));
1192 __ cmpl(t, _thread_in_Java);
1193 __ jcc(Assembler::equal, L);
1194 __ stop("Wrong thread state in native stub");
1195 __ bind(L);
1196 }
1197 #endif
1198
1199 // Change state to native
1200 __ movl(Address(thread, JavaThread::thread_state_offset()), _thread_in_native);
1201 __ call(rax);
1202
1203 // result potentially in rdx:rax or ST0
1204
1205 // Verify or restore cpu control state after JNI call
1206 __ restore_cpu_control_state_after_jni();
1207
1208 // save potential result in ST(0) & rdx:rax
1209 // (if result handler is the T_FLOAT or T_DOUBLE handler, result must be in ST0 -
1210 // the check is necessary to avoid potential Intel FPU overflow problems by saving/restoring 'empty' FPU registers)
1211 // It is safe to do this push because state is _thread_in_native and return address will be found
1212 // via _last_native_pc and not via _last_jave_sp
1213
1214 // NOTE: the order of theses push(es) is known to frame::interpreter_frame_result.
1215 // If the order changes or anything else is added to the stack the code in
1216 // interpreter_frame_result will have to be changed.
1217
1218 { Label L;
1219 Label push_double;
1220 ExternalAddress float_handler(AbstractInterpreter::result_handler(T_FLOAT));
1221 ExternalAddress double_handler(AbstractInterpreter::result_handler(T_DOUBLE));
1222 __ cmpptr(Address(rbp, (frame::interpreter_frame_oop_temp_offset + 1)*wordSize),
1223 float_handler.addr());
1224 __ jcc(Assembler::equal, push_double);
1225 __ cmpptr(Address(rbp, (frame::interpreter_frame_oop_temp_offset + 1)*wordSize),
1226 double_handler.addr());
1227 __ jcc(Assembler::notEqual, L);
1228 __ bind(push_double);
1229 __ push_d(); // FP values are returned using the FPU, so push FPU contents (even if UseSSE > 0).
1230 __ bind(L);
1231 }
1232 __ push(ltos);
1233
1234 // change thread state
1235 __ get_thread(thread);
1236 __ movl(Address(thread, JavaThread::thread_state_offset()), _thread_in_native_trans);
1237 if(os::is_MP()) {
1238 if (UseMembar) {
1239 // Force this write out before the read below
1240 __ membar(Assembler::Membar_mask_bits(
1241 Assembler::LoadLoad | Assembler::LoadStore |
1242 Assembler::StoreLoad | Assembler::StoreStore));
1243 } else {
1244 // Write serialization page so VM thread can do a pseudo remote membar.
1245 // We use the current thread pointer to calculate a thread specific
1246 // offset to write to within the page. This minimizes bus traffic
1247 // due to cache line collision.
1248 __ serialize_memory(thread, rcx);
1249 }
1250 }
1251
1252 if (AlwaysRestoreFPU) {
1253 // Make sure the control word is correct.
1254 __ fldcw(ExternalAddress(StubRoutines::addr_fpu_cntrl_wrd_std()));
1255 }
1256
1257 // check for safepoint operation in progress and/or pending suspend requests
1258 { Label Continue;
1259
1260 __ cmp32(ExternalAddress(SafepointSynchronize::address_of_state()),
1261 SafepointSynchronize::_not_synchronized);
1262
1263 Label L;
1264 __ jcc(Assembler::notEqual, L);
1265 __ cmpl(Address(thread, JavaThread::suspend_flags_offset()), 0);
1266 __ jcc(Assembler::equal, Continue);
1267 __ bind(L);
1268
1269 // Don't use call_VM as it will see a possible pending exception and forward it
1270 // and never return here preventing us from clearing _last_native_pc down below.
1271 // Also can't use call_VM_leaf either as it will check to see if rsi & rdi are
1272 // preserved and correspond to the bcp/locals pointers. So we do a runtime call
1273 // by hand.
1274 //
1275 __ push(thread);
1276 __ call(RuntimeAddress(CAST_FROM_FN_PTR(address,
1277 JavaThread::check_special_condition_for_native_trans)));
1278 __ increment(rsp, wordSize);
1279 __ get_thread(thread);
1280
1281 __ bind(Continue);
1282 }
1283
1284 // change thread state
1285 __ movl(Address(thread, JavaThread::thread_state_offset()), _thread_in_Java);
1286
1287 __ reset_last_Java_frame(thread, true, true);
1288
1289 // reset handle block
1290 __ movptr(t, Address(thread, JavaThread::active_handles_offset()));
1291 __ movl(Address(t, JNIHandleBlock::top_offset_in_bytes()), NULL_WORD);
1292
1293 // If result was an oop then unbox and save it in the frame
1294 { Label L;
1295 Label no_oop, store_result;
1296 ExternalAddress handler(AbstractInterpreter::result_handler(T_OBJECT));
1297 __ cmpptr(Address(rbp, frame::interpreter_frame_result_handler_offset*wordSize),
1298 handler.addr());
1299 __ jcc(Assembler::notEqual, no_oop);
1300 __ cmpptr(Address(rsp, 0), (int32_t)NULL_WORD);
1301 __ pop(ltos);
1302 __ testptr(rax, rax);
1303 __ jcc(Assembler::zero, store_result);
1304 // unbox
1305 __ movptr(rax, Address(rax, 0));
1306 __ bind(store_result);
1307 __ movptr(Address(rbp, (frame::interpreter_frame_oop_temp_offset)*wordSize), rax);
1308 // keep stack depth as expected by pushing oop which will eventually be discarded
1309 __ push(ltos);
1310 __ bind(no_oop);
1311 }
1312
1313 {
1314 Label no_reguard;
1315 __ cmpl(Address(thread, JavaThread::stack_guard_state_offset()), JavaThread::stack_guard_yellow_disabled);
1316 __ jcc(Assembler::notEqual, no_reguard);
1317
1318 __ pusha();
1319 __ call(RuntimeAddress(CAST_FROM_FN_PTR(address, SharedRuntime::reguard_yellow_pages)));
1320 __ popa();
1321
1322 __ bind(no_reguard);
1323 }
1324
1325 // restore rsi to have legal interpreter frame,
1326 // i.e., bci == 0 <=> rsi == code_base()
1327 // Can't call_VM until bcp is within reasonable.
1328 __ get_method(method); // method is junk from thread_in_native to now.
1329 __ movptr(rsi, Address(method,Method::const_offset())); // get ConstMethod*
1330 __ lea(rsi, Address(rsi,ConstMethod::codes_offset())); // get codebase
1331
1332 // handle exceptions (exception handling will handle unlocking!)
1333 { Label L;
1334 __ cmpptr(Address(thread, Thread::pending_exception_offset()), (int32_t)NULL_WORD);
1335 __ jcc(Assembler::zero, L);
1336 // Note: At some point we may want to unify this with the code used in call_VM_base();
1337 // i.e., we should use the StubRoutines::forward_exception code. For now this
1338 // doesn't work here because the rsp is not correctly set at this point.
1339 __ MacroAssembler::call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::throw_pending_exception));
1340 __ should_not_reach_here();
1341 __ bind(L);
1342 }
1343
1344 // do unlocking if necessary
1345 { Label L;
1346 __ movl(t, Address(method, Method::access_flags_offset()));
1347 __ testl(t, JVM_ACC_SYNCHRONIZED);
1348 __ jcc(Assembler::zero, L);
1349 // the code below should be shared with interpreter macro assembler implementation
1350 { Label unlock;
1351 // BasicObjectLock will be first in list, since this is a synchronized method. However, need
1352 // to check that the object has not been unlocked by an explicit monitorexit bytecode.
1353 const Address monitor(rbp, frame::interpreter_frame_initial_sp_offset * wordSize - (int)sizeof(BasicObjectLock));
1354
1355 __ lea(rdx, monitor); // address of first monitor
1356
1357 __ movptr(t, Address(rdx, BasicObjectLock::obj_offset_in_bytes()));
1358 __ testptr(t, t);
1359 __ jcc(Assembler::notZero, unlock);
1360
1361 // Entry already unlocked, need to throw exception
1362 __ MacroAssembler::call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::throw_illegal_monitor_state_exception));
1363 __ should_not_reach_here();
1364
1365 __ bind(unlock);
1366 __ unlock_object(rdx);
1367 }
1368 __ bind(L);
1369 }
1370
1371 // jvmti/dtrace support
1372 // Note: This must happen _after_ handling/throwing any exceptions since
1373 // the exception handler code notifies the runtime of method exits
1374 // too. If this happens before, method entry/exit notifications are
1375 // not properly paired (was bug - gri 11/22/99).
1376 __ notify_method_exit(vtos, InterpreterMacroAssembler::NotifyJVMTI);
1377
1378 // restore potential result in rdx:rax, call result handler to restore potential result in ST0 & handle result
1379 __ pop(ltos);
1380 __ movptr(t, Address(rbp, frame::interpreter_frame_result_handler_offset*wordSize));
1381 __ call(t);
1382
1383 // remove activation
1384 __ movptr(t, Address(rbp, frame::interpreter_frame_sender_sp_offset * wordSize)); // get sender sp
1385 __ leave(); // remove frame anchor
1386 __ pop(rdi); // get return address
1387 __ mov(rsp, t); // set sp to sender sp
1388 __ jmp(rdi);
1389
1390 if (inc_counter) {
1391 // Handle overflow of counter and compile method
1392 __ bind(invocation_counter_overflow);
1393 generate_counter_overflow(&continue_after_compile);
1394 }
1395
1396 return entry_point;
1397 }
1398
1399 //
1400 // Generic interpreted method entry to (asm) interpreter
1401 //
1402 address InterpreterGenerator::generate_normal_entry(bool synchronized) {
1403 // determine code generation flags
1404 bool inc_counter = UseCompiler || CountCompiledCalls || LogTouchedMethods;
1405
1406 // rbx,: Method*
1407 // rsi: sender sp
1408 address entry_point = __ pc();
1409
1410 const Address constMethod (rbx, Method::const_offset());
1411 const Address access_flags (rbx, Method::access_flags_offset());
1412 const Address size_of_parameters(rdx, ConstMethod::size_of_parameters_offset());
1413 const Address size_of_locals (rdx, ConstMethod::size_of_locals_offset());
1414
1415 // get parameter size (always needed)
1416 __ movptr(rdx, constMethod);
1417 __ load_unsigned_short(rcx, size_of_parameters);
1418
1419 // rbx,: Method*
1420 // rcx: size of parameters
1421
1422 // rsi: sender_sp (could differ from sp+wordSize if we were called via c2i )
1423
1424 __ load_unsigned_short(rdx, size_of_locals); // get size of locals in words
1425 __ subl(rdx, rcx); // rdx = no. of additional locals
1426
1427 // see if we've got enough room on the stack for locals plus overhead.
1428 generate_stack_overflow_check();
1429
1430 // get return address
1431 __ pop(rax);
1432
1433 // compute beginning of parameters (rdi)
1434 __ lea(rdi, Address(rsp, rcx, Interpreter::stackElementScale(), -wordSize));
1435
1436 // rdx - # of additional locals
1437 // allocate space for locals
1438 // explicitly initialize locals
1439 {
1440 Label exit, loop;
1441 __ testl(rdx, rdx);
1442 __ jcc(Assembler::lessEqual, exit); // do nothing if rdx <= 0
1443 __ bind(loop);
1444 __ push((int32_t)NULL_WORD); // initialize local variables
1445 __ decrement(rdx); // until everything initialized
1446 __ jcc(Assembler::greater, loop);
1447 __ bind(exit);
1448 }
1449
1450 // initialize fixed part of activation frame
1451 generate_fixed_frame(false);
1452
1453 // make sure method is not native & not abstract
1454 #ifdef ASSERT
1455 __ movl(rax, access_flags);
1456 {
1457 Label L;
1458 __ testl(rax, JVM_ACC_NATIVE);
1459 __ jcc(Assembler::zero, L);
1460 __ stop("tried to execute native method as non-native");
1461 __ bind(L);
1462 }
1463 { Label L;
1464 __ testl(rax, JVM_ACC_ABSTRACT);
1465 __ jcc(Assembler::zero, L);
1466 __ stop("tried to execute abstract method in interpreter");
1467 __ bind(L);
1468 }
1469 #endif
1470
1471 // Since at this point in the method invocation the exception handler
1472 // would try to exit the monitor of synchronized methods which hasn't
1473 // been entered yet, we set the thread local variable
1474 // _do_not_unlock_if_synchronized to true. The remove_activation will
1475 // check this flag.
1476
1477 __ get_thread(rax);
1478 const Address do_not_unlock_if_synchronized(rax,
1479 in_bytes(JavaThread::do_not_unlock_if_synchronized_offset()));
1480 __ movbool(do_not_unlock_if_synchronized, true);
1481
1482 __ profile_parameters_type(rax, rcx, rdx);
1483 // increment invocation count & check for overflow
1484 Label invocation_counter_overflow;
1485 Label profile_method;
1486 Label profile_method_continue;
1487 if (inc_counter) {
1488 generate_counter_incr(&invocation_counter_overflow, &profile_method, &profile_method_continue);
1489 if (ProfileInterpreter) {
1490 __ bind(profile_method_continue);
1491 }
1492 }
1493 Label continue_after_compile;
1494 __ bind(continue_after_compile);
1495
1496 bang_stack_shadow_pages(false);
1497
1498 // reset the _do_not_unlock_if_synchronized flag
1499 __ get_thread(rax);
1500 __ movbool(do_not_unlock_if_synchronized, false);
1501
1502 // check for synchronized methods
1503 // Must happen AFTER invocation_counter check and stack overflow check,
1504 // so method is not locked if overflows.
1505 //
1506 if (synchronized) {
1507 // Allocate monitor and lock method
1508 lock_method();
1509 } else {
1510 // no synchronization necessary
1511 #ifdef ASSERT
1512 { Label L;
1513 __ movl(rax, access_flags);
1514 __ testl(rax, JVM_ACC_SYNCHRONIZED);
1515 __ jcc(Assembler::zero, L);
1516 __ stop("method needs synchronization");
1517 __ bind(L);
1518 }
1519 #endif
1520 }
1521
1522 // start execution
1523 #ifdef ASSERT
1524 { Label L;
1525 const Address monitor_block_top (rbp,
1526 frame::interpreter_frame_monitor_block_top_offset * wordSize);
1527 __ movptr(rax, monitor_block_top);
1528 __ cmpptr(rax, rsp);
1529 __ jcc(Assembler::equal, L);
1530 __ stop("broken stack frame setup in interpreter");
1531 __ bind(L);
1532 }
1533 #endif
1534
1535 // jvmti support
1536 __ notify_method_entry();
1537
1538 __ dispatch_next(vtos);
1539
1540 // invocation counter overflow
1541 if (inc_counter) {
1542 if (ProfileInterpreter) {
1543 // We have decided to profile this method in the interpreter
1544 __ bind(profile_method);
1545 __ call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::profile_method));
1546 __ set_method_data_pointer_for_bcp();
1547 __ get_method(rbx);
1548 __ jmp(profile_method_continue);
1549 }
1550 // Handle overflow of counter and compile method
1551 __ bind(invocation_counter_overflow);
1552 generate_counter_overflow(&continue_after_compile);
1553 }
1554
1555 return entry_point;
1556 }
1557
1558
1559 // These should never be compiled since the interpreter will prefer
1560 // the compiled version to the intrinsic version.
1561 bool AbstractInterpreter::can_be_compiled(methodHandle m) {
1562 switch (method_kind(m)) {
1563 case Interpreter::java_lang_math_sin : // fall thru
1564 case Interpreter::java_lang_math_cos : // fall thru
1565 case Interpreter::java_lang_math_tan : // fall thru
1566 case Interpreter::java_lang_math_abs : // fall thru
1567 case Interpreter::java_lang_math_log : // fall thru
1568 case Interpreter::java_lang_math_log10 : // fall thru
1569 case Interpreter::java_lang_math_sqrt : // fall thru
1570 case Interpreter::java_lang_math_pow : // fall thru
1571 case Interpreter::java_lang_math_exp :
1572 return false;
1573 default:
1574 return true;
1575 }
1576 }
1577
1578 // How much stack a method activation needs in words.
1579 int AbstractInterpreter::size_top_interpreter_activation(Method* method) {
1580
1581 const int stub_code = 4; // see generate_call_stub
1582 // Save space for one monitor to get into the interpreted method in case
1583 // the method is synchronized
1584 int monitor_size = method->is_synchronized() ?
1585 1*frame::interpreter_frame_monitor_size() : 0;
1586
1587 // total overhead size: entry_size + (saved rbp, thru expr stack bottom).
1588 // be sure to change this if you add/subtract anything to/from the overhead area
1589 const int overhead_size = -frame::interpreter_frame_initial_sp_offset;
1590
1591 const int method_stack = (method->max_locals() + method->max_stack()) *
1592 Interpreter::stackElementWords;
1593 return overhead_size + method_stack + stub_code;
1594 }
1595
1596 //------------------------------------------------------------------------------------------------------------------------
1597 // Exceptions
1598
1599 void TemplateInterpreterGenerator::generate_throw_exception() {
1600 // Entry point in previous activation (i.e., if the caller was interpreted)
1601 Interpreter::_rethrow_exception_entry = __ pc();
1602 const Register thread = rcx;
1603
1604 // Restore sp to interpreter_frame_last_sp even though we are going
1605 // to empty the expression stack for the exception processing.
1606 __ movptr(Address(rbp, frame::interpreter_frame_last_sp_offset * wordSize), NULL_WORD);
1607 // rax,: exception
1608 // rdx: return address/pc that threw exception
1609 __ restore_bcp(); // rsi points to call/send
1610 __ restore_locals();
1611
1612 // Entry point for exceptions thrown within interpreter code
1613 Interpreter::_throw_exception_entry = __ pc();
1614 // expression stack is undefined here
1615 // rax,: exception
1616 // rsi: exception bcp
1617 __ verify_oop(rax);
1618
1619 // expression stack must be empty before entering the VM in case of an exception
1620 __ empty_expression_stack();
1621 __ empty_FPU_stack();
1622 // find exception handler address and preserve exception oop
1623 __ call_VM(rdx, CAST_FROM_FN_PTR(address, InterpreterRuntime::exception_handler_for_exception), rax);
1624 // rax,: exception handler entry point
1625 // rdx: preserved exception oop
1626 // rsi: bcp for exception handler
1627 __ push_ptr(rdx); // push exception which is now the only value on the stack
1628 __ jmp(rax); // jump to exception handler (may be _remove_activation_entry!)
1629
1630 // If the exception is not handled in the current frame the frame is removed and
1631 // the exception is rethrown (i.e. exception continuation is _rethrow_exception).
1632 //
1633 // Note: At this point the bci is still the bxi for the instruction which caused
1634 // the exception and the expression stack is empty. Thus, for any VM calls
1635 // at this point, GC will find a legal oop map (with empty expression stack).
1636
1637 // In current activation
1638 // tos: exception
1639 // rsi: exception bcp
1640
1641 //
1642 // JVMTI PopFrame support
1643 //
1644
1645 Interpreter::_remove_activation_preserving_args_entry = __ pc();
1646 __ empty_expression_stack();
1647 __ empty_FPU_stack();
1648 // Set the popframe_processing bit in pending_popframe_condition indicating that we are
1649 // currently handling popframe, so that call_VMs that may happen later do not trigger new
1650 // popframe handling cycles.
1651 __ get_thread(thread);
1652 __ movl(rdx, Address(thread, JavaThread::popframe_condition_offset()));
1653 __ orl(rdx, JavaThread::popframe_processing_bit);
1654 __ movl(Address(thread, JavaThread::popframe_condition_offset()), rdx);
1655
1656 {
1657 // Check to see whether we are returning to a deoptimized frame.
1658 // (The PopFrame call ensures that the caller of the popped frame is
1659 // either interpreted or compiled and deoptimizes it if compiled.)
1660 // In this case, we can't call dispatch_next() after the frame is
1661 // popped, but instead must save the incoming arguments and restore
1662 // them after deoptimization has occurred.
1663 //
1664 // Note that we don't compare the return PC against the
1665 // deoptimization blob's unpack entry because of the presence of
1666 // adapter frames in C2.
1667 Label caller_not_deoptimized;
1668 __ movptr(rdx, Address(rbp, frame::return_addr_offset * wordSize));
1669 __ super_call_VM_leaf(CAST_FROM_FN_PTR(address, InterpreterRuntime::interpreter_contains), rdx);
1670 __ testl(rax, rax);
1671 __ jcc(Assembler::notZero, caller_not_deoptimized);
1672
1673 // Compute size of arguments for saving when returning to deoptimized caller
1674 __ get_method(rax);
1675 __ movptr(rax, Address(rax, Method::const_offset()));
1676 __ load_unsigned_short(rax, Address(rax, ConstMethod::size_of_parameters_offset()));
1677 __ shlptr(rax, Interpreter::logStackElementSize);
1678 __ restore_locals();
1679 __ subptr(rdi, rax);
1680 __ addptr(rdi, wordSize);
1681 // Save these arguments
1682 __ get_thread(thread);
1683 __ super_call_VM_leaf(CAST_FROM_FN_PTR(address, Deoptimization::popframe_preserve_args), thread, rax, rdi);
1684
1685 __ remove_activation(vtos, rdx,
1686 /* throw_monitor_exception */ false,
1687 /* install_monitor_exception */ false,
1688 /* notify_jvmdi */ false);
1689
1690 // Inform deoptimization that it is responsible for restoring these arguments
1691 __ get_thread(thread);
1692 __ movl(Address(thread, JavaThread::popframe_condition_offset()), JavaThread::popframe_force_deopt_reexecution_bit);
1693
1694 // Continue in deoptimization handler
1695 __ jmp(rdx);
1696
1697 __ bind(caller_not_deoptimized);
1698 }
1699
1700 __ remove_activation(vtos, rdx,
1701 /* throw_monitor_exception */ false,
1702 /* install_monitor_exception */ false,
1703 /* notify_jvmdi */ false);
1704
1705 // Finish with popframe handling
1706 // A previous I2C followed by a deoptimization might have moved the
1707 // outgoing arguments further up the stack. PopFrame expects the
1708 // mutations to those outgoing arguments to be preserved and other
1709 // constraints basically require this frame to look exactly as
1710 // though it had previously invoked an interpreted activation with
1711 // no space between the top of the expression stack (current
1712 // last_sp) and the top of stack. Rather than force deopt to
1713 // maintain this kind of invariant all the time we call a small
1714 // fixup routine to move the mutated arguments onto the top of our
1715 // expression stack if necessary.
1716 __ mov(rax, rsp);
1717 __ movptr(rbx, Address(rbp, frame::interpreter_frame_last_sp_offset * wordSize));
1718 __ get_thread(thread);
1719 // PC must point into interpreter here
1720 __ set_last_Java_frame(thread, noreg, rbp, __ pc());
1721 __ super_call_VM_leaf(CAST_FROM_FN_PTR(address, InterpreterRuntime::popframe_move_outgoing_args), thread, rax, rbx);
1722 __ get_thread(thread);
1723 __ reset_last_Java_frame(thread, true, true);
1724 // Restore the last_sp and null it out
1725 __ movptr(rsp, Address(rbp, frame::interpreter_frame_last_sp_offset * wordSize));
1726 __ movptr(Address(rbp, frame::interpreter_frame_last_sp_offset * wordSize), NULL_WORD);
1727
1728 __ restore_bcp();
1729 __ restore_locals();
1730 // The method data pointer was incremented already during
1731 // call profiling. We have to restore the mdp for the current bcp.
1732 if (ProfileInterpreter) {
1733 __ set_method_data_pointer_for_bcp();
1734 }
1735
1736 // Clear the popframe condition flag
1737 __ get_thread(thread);
1738 __ movl(Address(thread, JavaThread::popframe_condition_offset()), JavaThread::popframe_inactive);
1739
1740 #if INCLUDE_JVMTI
1741 {
1742 Label L_done;
1743 const Register local0 = rdi;
1744
1745 __ cmpb(Address(rsi, 0), Bytecodes::_invokestatic);
1746 __ jcc(Assembler::notEqual, L_done);
1747
1748 // The member name argument must be restored if _invokestatic is re-executed after a PopFrame call.
1749 // Detect such a case in the InterpreterRuntime function and return the member name argument, or NULL.
1750
1751 __ get_method(rdx);
1752 __ movptr(rax, Address(local0, 0));
1753 __ call_VM(rax, CAST_FROM_FN_PTR(address, InterpreterRuntime::member_name_arg_or_null), rax, rdx, rsi);
1754
1755 __ testptr(rax, rax);
1756 __ jcc(Assembler::zero, L_done);
1757
1758 __ movptr(Address(rbx, 0), rax);
1759 __ bind(L_done);
1760 }
1761 #endif // INCLUDE_JVMTI
1762
1763 __ dispatch_next(vtos);
1764 // end of PopFrame support
1765
1766 Interpreter::_remove_activation_entry = __ pc();
1767
1768 // preserve exception over this code sequence
1769 __ pop_ptr(rax);
1770 __ get_thread(thread);
1771 __ movptr(Address(thread, JavaThread::vm_result_offset()), rax);
1772 // remove the activation (without doing throws on illegalMonitorExceptions)
1773 __ remove_activation(vtos, rdx, false, true, false);
1774 // restore exception
1775 __ get_thread(thread);
1776 __ get_vm_result(rax, thread);
1777
1778 // Inbetween activations - previous activation type unknown yet
1779 // compute continuation point - the continuation point expects
1780 // the following registers set up:
1781 //
1782 // rax: exception
1783 // rdx: return address/pc that threw exception
1784 // rsp: expression stack of caller
1785 // rbp: rbp, of caller
1786 __ push(rax); // save exception
1787 __ push(rdx); // save return address
1788 __ super_call_VM_leaf(CAST_FROM_FN_PTR(address, SharedRuntime::exception_handler_for_return_address), thread, rdx);
1789 __ mov(rbx, rax); // save exception handler
1790 __ pop(rdx); // restore return address
1791 __ pop(rax); // restore exception
1792 // Note that an "issuing PC" is actually the next PC after the call
1793 __ jmp(rbx); // jump to exception handler of caller
1794 }
1795
1796
1797 //
1798 // JVMTI ForceEarlyReturn support
1799 //
1800 address TemplateInterpreterGenerator::generate_earlyret_entry_for(TosState state) {
1801 address entry = __ pc();
1802 const Register thread = rcx;
1803
1804 __ restore_bcp();
1805 __ restore_locals();
1806 __ empty_expression_stack();
1807 __ empty_FPU_stack();
1808 __ load_earlyret_value(state);
1809
1810 __ get_thread(thread);
1811 __ movptr(rcx, Address(thread, JavaThread::jvmti_thread_state_offset()));
1812 const Address cond_addr(rcx, JvmtiThreadState::earlyret_state_offset());
1813
1814 // Clear the earlyret state
1815 __ movl(cond_addr, JvmtiThreadState::earlyret_inactive);
1816
1817 __ remove_activation(state, rsi,
1818 false, /* throw_monitor_exception */
1819 false, /* install_monitor_exception */
1820 true); /* notify_jvmdi */
1821 __ jmp(rsi);
1822 return entry;
1823 } // end of ForceEarlyReturn support
1824
1825
1826 //------------------------------------------------------------------------------------------------------------------------
1827 // Helper for vtos entry point generation
1828
1829 void TemplateInterpreterGenerator::set_vtos_entry_points (Template* t, address& bep, address& cep, address& sep, address& aep, address& iep, address& lep, address& fep, address& dep, address& vep) {
1830 assert(t->is_valid() && t->tos_in() == vtos, "illegal template");
1831 Label L;
1832 fep = __ pc(); __ push(ftos); __ jmp(L);
1833 dep = __ pc(); __ push(dtos); __ jmp(L);
1834 lep = __ pc(); __ push(ltos); __ jmp(L);
1835 aep = __ pc(); __ push(atos); __ jmp(L);
1836 bep = cep = sep = // fall through
1837 iep = __ pc(); __ push(itos); // fall through
1838 vep = __ pc(); __ bind(L); // fall through
1839 generate_and_dispatch(t);
1840 }
1841
1842 //------------------------------------------------------------------------------------------------------------------------
1843 // Generation of individual instructions
1844
1845 // helpers for generate_and_dispatch
1846
1847
1848
1849 InterpreterGenerator::InterpreterGenerator(StubQueue* code)
1850 : TemplateInterpreterGenerator(code) {
1851 generate_all(); // down here so it can be "virtual"
1852 }
1853
1854 //------------------------------------------------------------------------------------------------------------------------
1855
1856 // Non-product code
1857 #ifndef PRODUCT
1858 address TemplateInterpreterGenerator::generate_trace_code(TosState state) {
1859 address entry = __ pc();
1860
1861 // prepare expression stack
1862 __ pop(rcx); // pop return address so expression stack is 'pure'
1863 __ push(state); // save tosca
1864
1865 // pass tosca registers as arguments & call tracer
1866 __ call_VM(noreg, CAST_FROM_FN_PTR(address, SharedRuntime::trace_bytecode), rcx, rax, rdx);
1867 __ mov(rcx, rax); // make sure return address is not destroyed by pop(state)
1868 __ pop(state); // restore tosca
1869
1870 // return
1871 __ jmp(rcx);
1872
1873 return entry;
1874 }
1875
1876
1877 void TemplateInterpreterGenerator::count_bytecode() {
1878 __ incrementl(ExternalAddress((address) &BytecodeCounter::_counter_value));
1879 }
1880
1881
1882 void TemplateInterpreterGenerator::histogram_bytecode(Template* t) {
1883 __ incrementl(ExternalAddress((address) &BytecodeHistogram::_counters[t->bytecode()]));
1884 }
1885
1886
1887 void TemplateInterpreterGenerator::histogram_bytecode_pair(Template* t) {
1888 __ mov32(ExternalAddress((address) &BytecodePairHistogram::_index), rbx);
1889 __ shrl(rbx, BytecodePairHistogram::log2_number_of_codes);
1890 __ orl(rbx, ((int)t->bytecode()) << BytecodePairHistogram::log2_number_of_codes);
1891 ExternalAddress table((address) BytecodePairHistogram::_counters);
1892 Address index(noreg, rbx, Address::times_4);
1893 __ incrementl(ArrayAddress(table, index));
1894 }
1895
1896
1897 void TemplateInterpreterGenerator::trace_bytecode(Template* t) {
1898 // Call a little run-time stub to avoid blow-up for each bytecode.
1899 // The run-time runtime saves the right registers, depending on
1900 // the tosca in-state for the given template.
1901 assert(Interpreter::trace_code(t->tos_in()) != NULL,
1902 "entry must have been generated");
1903 __ call(RuntimeAddress(Interpreter::trace_code(t->tos_in())));
1904 }
1905
1906
1907 void TemplateInterpreterGenerator::stop_interpreter_at() {
1908 Label L;
1909 __ cmp32(ExternalAddress((address) &BytecodeCounter::_counter_value),
1910 StopInterpreterAt);
1911 __ jcc(Assembler::notEqual, L);
1912 __ int3();
1913 __ bind(L);
1914 }
1915 #endif // !PRODUCT
1916 #endif // CC_INTERP
--- EOF ---