Mercurial > jdk8-mips64-public > hotspot / file revision
src/cpu/x86/vm/templateInterpreter_x86_32.cpp@e66fd840cb6b
src/cpu/x86/vm/templateInterpreter_x86_32.cpp
Mon, 04 Jan 2010 18:38:08 +0100
- author
- twisti
- date
- Mon, 04 Jan 2010 18:38:08 +0100
- changeset 1570
- e66fd840cb6b
- parent 1494
- 389049f3f393
- child 1609
- ddb7834449d0
- permissions
- -rw-r--r--
6893081: method handle & invokedynamic code needs additional cleanup (post 6815692, 6858164)
Summary: During the work for 6829187 we have fixed a number of basic bugs which are logically grouped with 6815692 and 6858164 but which must be reviewed and pushed separately.
Reviewed-by: kvn, never
1 /*
2 * Copyright 1997-2009 Sun Microsystems, Inc. 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
20 * CA 95054 USA or visit www.sun.com if you need additional information or
21 * have any questions.
22 *
23 */
25 #include "incls/_precompiled.incl"
26 #include "incls/_templateInterpreter_x86_32.cpp.incl"
28 #define __ _masm->
31 #ifndef CC_INTERP
32 const int method_offset = frame::interpreter_frame_method_offset * wordSize;
33 const int bci_offset = frame::interpreter_frame_bcx_offset * wordSize;
34 const int locals_offset = frame::interpreter_frame_locals_offset * wordSize;
36 //------------------------------------------------------------------------------------------------------------------------
38 address TemplateInterpreterGenerator::generate_StackOverflowError_handler() {
39 address entry = __ pc();
41 // Note: There should be a minimal interpreter frame set up when stack
42 // overflow occurs since we check explicitly for it now.
43 //
44 #ifdef ASSERT
45 { Label L;
46 __ lea(rax, Address(rbp,
47 frame::interpreter_frame_monitor_block_top_offset * wordSize));
48 __ cmpptr(rax, rsp); // rax, = maximal rsp for current rbp,
49 // (stack grows negative)
50 __ jcc(Assembler::aboveEqual, L); // check if frame is complete
51 __ stop ("interpreter frame not set up");
52 __ bind(L);
53 }
54 #endif // ASSERT
55 // Restore bcp under the assumption that the current frame is still
56 // interpreted
57 __ restore_bcp();
59 // expression stack must be empty before entering the VM if an exception
60 // happened
61 __ empty_expression_stack();
62 __ empty_FPU_stack();
63 // throw exception
64 __ call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::throw_StackOverflowError));
65 return entry;
66 }
68 address TemplateInterpreterGenerator::generate_ArrayIndexOutOfBounds_handler(const char* name) {
69 address entry = __ pc();
70 // expression stack must be empty before entering the VM if an exception happened
71 __ empty_expression_stack();
72 __ empty_FPU_stack();
73 // setup parameters
74 // ??? convention: expect aberrant index in register rbx,
75 __ lea(rax, ExternalAddress((address)name));
76 __ call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::throw_ArrayIndexOutOfBoundsException), rax, rbx);
77 return entry;
78 }
80 address TemplateInterpreterGenerator::generate_ClassCastException_handler() {
81 address entry = __ pc();
82 // object is at TOS
83 __ pop(rax);
84 // expression stack must be empty before entering the VM if an exception
85 // happened
86 __ empty_expression_stack();
87 __ empty_FPU_stack();
88 __ call_VM(noreg,
89 CAST_FROM_FN_PTR(address,
90 InterpreterRuntime::throw_ClassCastException),
91 rax);
92 return entry;
93 }
95 // Arguments are: required type at TOS+4, failing object (or NULL) at TOS.
96 address TemplateInterpreterGenerator::generate_WrongMethodType_handler() {
97 address entry = __ pc();
99 __ pop(rbx); // actual failing object is at TOS
100 __ pop(rax); // required type is at TOS+4
102 __ verify_oop(rbx);
103 __ verify_oop(rax);
105 // Various method handle types use interpreter registers as temps.
106 __ restore_bcp();
107 __ restore_locals();
109 // Expression stack must be empty before entering the VM for an exception.
110 __ empty_expression_stack();
111 __ empty_FPU_stack();
112 __ call_VM(noreg,
113 CAST_FROM_FN_PTR(address,
114 InterpreterRuntime::throw_WrongMethodTypeException),
115 // pass required type, failing object (or NULL)
116 rax, rbx);
117 return entry;
118 }
121 address TemplateInterpreterGenerator::generate_exception_handler_common(const char* name, const char* message, bool pass_oop) {
122 assert(!pass_oop || message == NULL, "either oop or message but not both");
123 address entry = __ pc();
124 if (pass_oop) {
125 // object is at TOS
126 __ pop(rbx);
127 }
128 // expression stack must be empty before entering the VM if an exception happened
129 __ empty_expression_stack();
130 __ empty_FPU_stack();
131 // setup parameters
132 __ lea(rax, ExternalAddress((address)name));
133 if (pass_oop) {
134 __ call_VM(rax, CAST_FROM_FN_PTR(address, InterpreterRuntime::create_klass_exception), rax, rbx);
135 } else {
136 if (message != NULL) {
137 __ lea(rbx, ExternalAddress((address)message));
138 } else {
139 __ movptr(rbx, NULL_WORD);
140 }
141 __ call_VM(rax, CAST_FROM_FN_PTR(address, InterpreterRuntime::create_exception), rax, rbx);
142 }
143 // throw exception
144 __ jump(ExternalAddress(Interpreter::throw_exception_entry()));
145 return entry;
146 }
149 address TemplateInterpreterGenerator::generate_continuation_for(TosState state) {
150 address entry = __ pc();
151 // NULL last_sp until next java call
152 __ movptr(Address(rbp, frame::interpreter_frame_last_sp_offset * wordSize), NULL_WORD);
153 __ dispatch_next(state);
154 return entry;
155 }
158 address TemplateInterpreterGenerator::generate_return_entry_for(TosState state, int step) {
159 TosState incoming_state = state;
161 Label interpreter_entry;
162 address compiled_entry = __ pc();
164 #ifdef COMPILER2
165 // The FPU stack is clean if UseSSE >= 2 but must be cleaned in other cases
166 if ((incoming_state == ftos && UseSSE < 1) || (incoming_state == dtos && UseSSE < 2)) {
167 for (int i = 1; i < 8; i++) {
168 __ ffree(i);
169 }
170 } else if (UseSSE < 2) {
171 __ empty_FPU_stack();
172 }
173 #endif
174 if ((incoming_state == ftos && UseSSE < 1) || (incoming_state == dtos && UseSSE < 2)) {
175 __ MacroAssembler::verify_FPU(1, "generate_return_entry_for compiled");
176 } else {
177 __ MacroAssembler::verify_FPU(0, "generate_return_entry_for compiled");
178 }
180 __ jmp(interpreter_entry, relocInfo::none);
181 // emit a sentinel we can test for when converting an interpreter
182 // entry point to a compiled entry point.
183 __ a_long(Interpreter::return_sentinel);
184 __ a_long((int)compiled_entry);
185 address entry = __ pc();
186 __ bind(interpreter_entry);
188 // In SSE mode, interpreter returns FP results in xmm0 but they need
189 // to end up back on the FPU so it can operate on them.
190 if (incoming_state == ftos && UseSSE >= 1) {
191 __ subptr(rsp, wordSize);
192 __ movflt(Address(rsp, 0), xmm0);
193 __ fld_s(Address(rsp, 0));
194 __ addptr(rsp, wordSize);
195 } else if (incoming_state == dtos && UseSSE >= 2) {
196 __ subptr(rsp, 2*wordSize);
197 __ movdbl(Address(rsp, 0), xmm0);
198 __ fld_d(Address(rsp, 0));
199 __ addptr(rsp, 2*wordSize);
200 }
202 __ MacroAssembler::verify_FPU(state == ftos || state == dtos ? 1 : 0, "generate_return_entry_for in interpreter");
204 // Restore stack bottom in case i2c adjusted stack
205 __ movptr(rsp, Address(rbp, frame::interpreter_frame_last_sp_offset * wordSize));
206 // and NULL it as marker that rsp is now tos until next java call
207 __ movptr(Address(rbp, frame::interpreter_frame_last_sp_offset * wordSize), NULL_WORD);
209 __ restore_bcp();
210 __ restore_locals();
212 Label L_got_cache, L_giant_index;
213 if (EnableInvokeDynamic) {
214 __ cmpb(Address(rsi, 0), Bytecodes::_invokedynamic);
215 __ jcc(Assembler::equal, L_giant_index);
216 }
217 __ get_cache_and_index_at_bcp(rbx, rcx, 1, false);
218 __ bind(L_got_cache);
219 __ movl(rbx, Address(rbx, rcx,
220 Address::times_ptr, constantPoolCacheOopDesc::base_offset() +
221 ConstantPoolCacheEntry::flags_offset()));
222 __ andptr(rbx, 0xFF);
223 __ lea(rsp, Address(rsp, rbx, Interpreter::stackElementScale()));
224 __ dispatch_next(state, step);
226 // out of the main line of code...
227 if (EnableInvokeDynamic) {
228 __ bind(L_giant_index);
229 __ get_cache_and_index_at_bcp(rbx, rcx, 1, true);
230 __ jmp(L_got_cache);
231 }
233 return entry;
234 }
237 address TemplateInterpreterGenerator::generate_deopt_entry_for(TosState state, int step) {
238 address entry = __ pc();
240 // In SSE mode, FP results are in xmm0
241 if (state == ftos && UseSSE > 0) {
242 __ subptr(rsp, wordSize);
243 __ movflt(Address(rsp, 0), xmm0);
244 __ fld_s(Address(rsp, 0));
245 __ addptr(rsp, wordSize);
246 } else if (state == dtos && UseSSE >= 2) {
247 __ subptr(rsp, 2*wordSize);
248 __ movdbl(Address(rsp, 0), xmm0);
249 __ fld_d(Address(rsp, 0));
250 __ addptr(rsp, 2*wordSize);
251 }
253 __ MacroAssembler::verify_FPU(state == ftos || state == dtos ? 1 : 0, "generate_deopt_entry_for in interpreter");
255 // The stack is not extended by deopt but we must NULL last_sp as this
256 // entry is like a "return".
257 __ movptr(Address(rbp, frame::interpreter_frame_last_sp_offset * wordSize), NULL_WORD);
258 __ restore_bcp();
259 __ restore_locals();
260 // handle exceptions
261 { Label L;
262 const Register thread = rcx;
263 __ get_thread(thread);
264 __ cmpptr(Address(thread, Thread::pending_exception_offset()), (int32_t)NULL_WORD);
265 __ jcc(Assembler::zero, L);
266 __ call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::throw_pending_exception));
267 __ should_not_reach_here();
268 __ bind(L);
269 }
270 __ dispatch_next(state, step);
271 return entry;
272 }
275 int AbstractInterpreter::BasicType_as_index(BasicType type) {
276 int i = 0;
277 switch (type) {
278 case T_BOOLEAN: i = 0; break;
279 case T_CHAR : i = 1; break;
280 case T_BYTE : i = 2; break;
281 case T_SHORT : i = 3; break;
282 case T_INT : // fall through
283 case T_LONG : // fall through
284 case T_VOID : i = 4; break;
285 case T_FLOAT : i = 5; break; // have to treat float and double separately for SSE
286 case T_DOUBLE : i = 6; break;
287 case T_OBJECT : // fall through
288 case T_ARRAY : i = 7; break;
289 default : ShouldNotReachHere();
290 }
291 assert(0 <= i && i < AbstractInterpreter::number_of_result_handlers, "index out of bounds");
292 return i;
293 }
296 address TemplateInterpreterGenerator::generate_result_handler_for(BasicType type) {
297 address entry = __ pc();
298 switch (type) {
299 case T_BOOLEAN: __ c2bool(rax); break;
300 case T_CHAR : __ andptr(rax, 0xFFFF); break;
301 case T_BYTE : __ sign_extend_byte (rax); break;
302 case T_SHORT : __ sign_extend_short(rax); break;
303 case T_INT : /* nothing to do */ break;
304 case T_DOUBLE :
305 case T_FLOAT :
306 { const Register t = InterpreterRuntime::SignatureHandlerGenerator::temp();
307 __ pop(t); // remove return address first
308 __ pop_dtos_to_rsp();
309 // Must return a result for interpreter or compiler. In SSE
310 // mode, results are returned in xmm0 and the FPU stack must
311 // be empty.
312 if (type == T_FLOAT && UseSSE >= 1) {
313 // Load ST0
314 __ fld_d(Address(rsp, 0));
315 // Store as float and empty fpu stack
316 __ fstp_s(Address(rsp, 0));
317 // and reload
318 __ movflt(xmm0, Address(rsp, 0));
319 } else if (type == T_DOUBLE && UseSSE >= 2 ) {
320 __ movdbl(xmm0, Address(rsp, 0));
321 } else {
322 // restore ST0
323 __ fld_d(Address(rsp, 0));
324 }
325 // and pop the temp
326 __ addptr(rsp, 2 * wordSize);
327 __ push(t); // restore return address
328 }
329 break;
330 case T_OBJECT :
331 // retrieve result from frame
332 __ movptr(rax, Address(rbp, frame::interpreter_frame_oop_temp_offset*wordSize));
333 // and verify it
334 __ verify_oop(rax);
335 break;
336 default : ShouldNotReachHere();
337 }
338 __ ret(0); // return from result handler
339 return entry;
340 }
342 address TemplateInterpreterGenerator::generate_safept_entry_for(TosState state, address runtime_entry) {
343 address entry = __ pc();
344 __ push(state);
345 __ call_VM(noreg, runtime_entry);
346 __ dispatch_via(vtos, Interpreter::_normal_table.table_for(vtos));
347 return entry;
348 }
351 // Helpers for commoning out cases in the various type of method entries.
352 //
354 // increment invocation count & check for overflow
355 //
356 // Note: checking for negative value instead of overflow
357 // so we have a 'sticky' overflow test
358 //
359 // rbx,: method
360 // rcx: invocation counter
361 //
362 void InterpreterGenerator::generate_counter_incr(Label* overflow, Label* profile_method, Label* profile_method_continue) {
364 const Address invocation_counter(rbx, methodOopDesc::invocation_counter_offset() + InvocationCounter::counter_offset());
365 const Address backedge_counter (rbx, methodOopDesc::backedge_counter_offset() + InvocationCounter::counter_offset());
367 if (ProfileInterpreter) { // %%% Merge this into methodDataOop
368 __ incrementl(Address(rbx,methodOopDesc::interpreter_invocation_counter_offset()));
369 }
370 // Update standard invocation counters
371 __ movl(rax, backedge_counter); // load backedge counter
373 __ incrementl(rcx, InvocationCounter::count_increment);
374 __ andl(rax, InvocationCounter::count_mask_value); // mask out the status bits
376 __ movl(invocation_counter, rcx); // save invocation count
377 __ addl(rcx, rax); // add both counters
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.
383 if (ProfileInterpreter && profile_method != NULL) {
384 // Test to see if we should create a method data oop
385 __ cmp32(rcx,
386 ExternalAddress((address)&InvocationCounter::InterpreterProfileLimit));
387 __ jcc(Assembler::less, *profile_method_continue);
389 // if no method data exists, go to profile_method
390 __ test_method_data_pointer(rax, *profile_method);
391 }
393 __ cmp32(rcx,
394 ExternalAddress((address)&InvocationCounter::InterpreterInvocationLimit));
395 __ jcc(Assembler::aboveEqual, *overflow);
397 }
399 void InterpreterGenerator::generate_counter_overflow(Label* do_continue) {
401 // Asm interpreter on entry
402 // rdi - locals
403 // rsi - bcp
404 // rbx, - method
405 // rdx - cpool
406 // rbp, - interpreter frame
408 // C++ interpreter on entry
409 // rsi - new interpreter state pointer
410 // rbp - interpreter frame pointer
411 // rbx - method
413 // On return (i.e. jump to entry_point) [ back to invocation of interpreter ]
414 // rbx, - method
415 // rcx - rcvr (assuming there is one)
416 // top of stack return address of interpreter caller
417 // rsp - sender_sp
419 // C++ interpreter only
420 // rsi - previous interpreter state pointer
422 const Address size_of_parameters(rbx, methodOopDesc::size_of_parameters_offset());
424 // InterpreterRuntime::frequency_counter_overflow takes one argument
425 // indicating if the counter overflow occurs at a backwards branch (non-NULL bcp).
426 // The call returns the address of the verified entry point for the method or NULL
427 // if the compilation did not complete (either went background or bailed out).
428 __ movptr(rax, (intptr_t)false);
429 __ call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::frequency_counter_overflow), rax);
431 __ movptr(rbx, Address(rbp, method_offset)); // restore methodOop
433 // Preserve invariant that rsi/rdi contain bcp/locals of sender frame
434 // and jump to the interpreted entry.
435 __ jmp(*do_continue, relocInfo::none);
437 }
439 void InterpreterGenerator::generate_stack_overflow_check(void) {
440 // see if we've got enough room on the stack for locals plus overhead.
441 // the expression stack grows down incrementally, so the normal guard
442 // page mechanism will work for that.
443 //
444 // Registers live on entry:
445 //
446 // Asm interpreter
447 // rdx: number of additional locals this frame needs (what we must check)
448 // rbx,: methodOop
450 // destroyed on exit
451 // rax,
453 // NOTE: since the additional locals are also always pushed (wasn't obvious in
454 // generate_method_entry) so the guard should work for them too.
455 //
457 // monitor entry size: see picture of stack set (generate_method_entry) and frame_x86.hpp
458 const int entry_size = frame::interpreter_frame_monitor_size() * wordSize;
460 // total overhead size: entry_size + (saved rbp, thru expr stack bottom).
461 // be sure to change this if you add/subtract anything to/from the overhead area
462 const int overhead_size = -(frame::interpreter_frame_initial_sp_offset*wordSize) + entry_size;
464 const int page_size = os::vm_page_size();
466 Label after_frame_check;
468 // see if the frame is greater than one page in size. If so,
469 // then we need to verify there is enough stack space remaining
470 // for the additional locals.
471 __ cmpl(rdx, (page_size - overhead_size)/Interpreter::stackElementSize());
472 __ jcc(Assembler::belowEqual, after_frame_check);
474 // compute rsp as if this were going to be the last frame on
475 // the stack before the red zone
477 Label after_frame_check_pop;
479 __ push(rsi);
481 const Register thread = rsi;
483 __ get_thread(thread);
485 const Address stack_base(thread, Thread::stack_base_offset());
486 const Address stack_size(thread, Thread::stack_size_offset());
488 // locals + overhead, in bytes
489 __ lea(rax, Address(noreg, rdx, Interpreter::stackElementScale(), overhead_size));
491 #ifdef ASSERT
492 Label stack_base_okay, stack_size_okay;
493 // verify that thread stack base is non-zero
494 __ cmpptr(stack_base, (int32_t)NULL_WORD);
495 __ jcc(Assembler::notEqual, stack_base_okay);
496 __ stop("stack base is zero");
497 __ bind(stack_base_okay);
498 // verify that thread stack size is non-zero
499 __ cmpptr(stack_size, 0);
500 __ jcc(Assembler::notEqual, stack_size_okay);
501 __ stop("stack size is zero");
502 __ bind(stack_size_okay);
503 #endif
505 // Add stack base to locals and subtract stack size
506 __ addptr(rax, stack_base);
507 __ subptr(rax, stack_size);
509 // Use the maximum number of pages we might bang.
510 const int max_pages = StackShadowPages > (StackRedPages+StackYellowPages) ? StackShadowPages :
511 (StackRedPages+StackYellowPages);
512 __ addptr(rax, max_pages * page_size);
514 // check against the current stack bottom
515 __ cmpptr(rsp, rax);
516 __ jcc(Assembler::above, after_frame_check_pop);
518 __ pop(rsi); // get saved bcp / (c++ prev state ).
520 __ pop(rax); // get return address
521 __ jump(ExternalAddress(Interpreter::throw_StackOverflowError_entry()));
523 // all done with frame size check
524 __ bind(after_frame_check_pop);
525 __ pop(rsi);
527 __ bind(after_frame_check);
528 }
530 // Allocate monitor and lock method (asm interpreter)
531 // rbx, - methodOop
532 //
533 void InterpreterGenerator::lock_method(void) {
534 // synchronize method
535 const Address access_flags (rbx, methodOopDesc::access_flags_offset());
536 const Address monitor_block_top (rbp, frame::interpreter_frame_monitor_block_top_offset * wordSize);
537 const int entry_size = frame::interpreter_frame_monitor_size() * wordSize;
539 #ifdef ASSERT
540 { Label L;
541 __ movl(rax, access_flags);
542 __ testl(rax, JVM_ACC_SYNCHRONIZED);
543 __ jcc(Assembler::notZero, L);
544 __ stop("method doesn't need synchronization");
545 __ bind(L);
546 }
547 #endif // ASSERT
548 // get synchronization object
549 { Label done;
550 const int mirror_offset = klassOopDesc::klass_part_offset_in_bytes() + Klass::java_mirror_offset_in_bytes();
551 __ movl(rax, access_flags);
552 __ testl(rax, JVM_ACC_STATIC);
553 __ movptr(rax, Address(rdi, Interpreter::local_offset_in_bytes(0))); // get receiver (assume this is frequent case)
554 __ jcc(Assembler::zero, done);
555 __ movptr(rax, Address(rbx, methodOopDesc::constants_offset()));
556 __ movptr(rax, Address(rax, constantPoolOopDesc::pool_holder_offset_in_bytes()));
557 __ movptr(rax, Address(rax, mirror_offset));
558 __ bind(done);
559 }
560 // add space for monitor & lock
561 __ subptr(rsp, entry_size); // add space for a monitor entry
562 __ movptr(monitor_block_top, rsp); // set new monitor block top
563 __ movptr(Address(rsp, BasicObjectLock::obj_offset_in_bytes()), rax); // store object
564 __ mov(rdx, rsp); // object address
565 __ lock_object(rdx);
566 }
568 //
569 // Generate a fixed interpreter frame. This is identical setup for interpreted methods
570 // and for native methods hence the shared code.
572 void TemplateInterpreterGenerator::generate_fixed_frame(bool native_call) {
573 // initialize fixed part of activation frame
574 __ push(rax); // save return address
575 __ enter(); // save old & set new rbp,
578 __ push(rsi); // set sender sp
579 __ push((int32_t)NULL_WORD); // leave last_sp as null
580 __ movptr(rsi, Address(rbx,methodOopDesc::const_offset())); // get constMethodOop
581 __ lea(rsi, Address(rsi,constMethodOopDesc::codes_offset())); // get codebase
582 __ push(rbx); // save methodOop
583 if (ProfileInterpreter) {
584 Label method_data_continue;
585 __ movptr(rdx, Address(rbx, in_bytes(methodOopDesc::method_data_offset())));
586 __ testptr(rdx, rdx);
587 __ jcc(Assembler::zero, method_data_continue);
588 __ addptr(rdx, in_bytes(methodDataOopDesc::data_offset()));
589 __ bind(method_data_continue);
590 __ push(rdx); // set the mdp (method data pointer)
591 } else {
592 __ push(0);
593 }
595 __ movptr(rdx, Address(rbx, methodOopDesc::constants_offset()));
596 __ movptr(rdx, Address(rdx, constantPoolOopDesc::cache_offset_in_bytes()));
597 __ push(rdx); // set constant pool cache
598 __ push(rdi); // set locals pointer
599 if (native_call) {
600 __ push(0); // no bcp
601 } else {
602 __ push(rsi); // set bcp
603 }
604 __ push(0); // reserve word for pointer to expression stack bottom
605 __ movptr(Address(rsp, 0), rsp); // set expression stack bottom
606 }
608 // End of helpers
610 //
611 // Various method entries
612 //------------------------------------------------------------------------------------------------------------------------
613 //
614 //
616 // Call an accessor method (assuming it is resolved, otherwise drop into vanilla (slow path) entry
618 address InterpreterGenerator::generate_accessor_entry(void) {
620 // rbx,: methodOop
621 // rcx: receiver (preserve for slow entry into asm interpreter)
623 // rsi: senderSP must preserved for slow path, set SP to it on fast path
625 address entry_point = __ pc();
626 Label xreturn_path;
628 // do fastpath for resolved accessor methods
629 if (UseFastAccessorMethods) {
630 Label slow_path;
631 // If we need a safepoint check, generate full interpreter entry.
632 ExternalAddress state(SafepointSynchronize::address_of_state());
633 __ cmp32(ExternalAddress(SafepointSynchronize::address_of_state()),
634 SafepointSynchronize::_not_synchronized);
636 __ jcc(Assembler::notEqual, slow_path);
637 // ASM/C++ Interpreter
638 // Code: _aload_0, _(i|a)getfield, _(i|a)return or any rewrites thereof; parameter size = 1
639 // Note: We can only use this code if the getfield has been resolved
640 // and if we don't have a null-pointer exception => check for
641 // these conditions first and use slow path if necessary.
642 // rbx,: method
643 // rcx: receiver
644 __ movptr(rax, Address(rsp, wordSize));
646 // check if local 0 != NULL and read field
647 __ testptr(rax, rax);
648 __ jcc(Assembler::zero, slow_path);
650 __ movptr(rdi, Address(rbx, methodOopDesc::constants_offset()));
651 // read first instruction word and extract bytecode @ 1 and index @ 2
652 __ movptr(rdx, Address(rbx, methodOopDesc::const_offset()));
653 __ movl(rdx, Address(rdx, constMethodOopDesc::codes_offset()));
654 // Shift codes right to get the index on the right.
655 // The bytecode fetched looks like <index><0xb4><0x2a>
656 __ shrl(rdx, 2*BitsPerByte);
657 __ shll(rdx, exact_log2(in_words(ConstantPoolCacheEntry::size())));
658 __ movptr(rdi, Address(rdi, constantPoolOopDesc::cache_offset_in_bytes()));
660 // rax,: local 0
661 // rbx,: method
662 // rcx: receiver - do not destroy since it is needed for slow path!
663 // rcx: scratch
664 // rdx: constant pool cache index
665 // rdi: constant pool cache
666 // rsi: sender sp
668 // check if getfield has been resolved and read constant pool cache entry
669 // check the validity of the cache entry by testing whether _indices field
670 // contains Bytecode::_getfield in b1 byte.
671 assert(in_words(ConstantPoolCacheEntry::size()) == 4, "adjust shift below");
672 __ movl(rcx,
673 Address(rdi,
674 rdx,
675 Address::times_ptr, constantPoolCacheOopDesc::base_offset() + ConstantPoolCacheEntry::indices_offset()));
676 __ shrl(rcx, 2*BitsPerByte);
677 __ andl(rcx, 0xFF);
678 __ cmpl(rcx, Bytecodes::_getfield);
679 __ jcc(Assembler::notEqual, slow_path);
681 // Note: constant pool entry is not valid before bytecode is resolved
682 __ movptr(rcx,
683 Address(rdi,
684 rdx,
685 Address::times_ptr, constantPoolCacheOopDesc::base_offset() + ConstantPoolCacheEntry::f2_offset()));
686 __ movl(rdx,
687 Address(rdi,
688 rdx,
689 Address::times_ptr, constantPoolCacheOopDesc::base_offset() + ConstantPoolCacheEntry::flags_offset()));
691 Label notByte, notShort, notChar;
692 const Address field_address (rax, rcx, Address::times_1);
694 // Need to differentiate between igetfield, agetfield, bgetfield etc.
695 // because they are different sizes.
696 // Use the type from the constant pool cache
697 __ shrl(rdx, ConstantPoolCacheEntry::tosBits);
698 // Make sure we don't need to mask rdx for tosBits after the above shift
699 ConstantPoolCacheEntry::verify_tosBits();
700 __ cmpl(rdx, btos);
701 __ jcc(Assembler::notEqual, notByte);
702 __ load_signed_byte(rax, field_address);
703 __ jmp(xreturn_path);
705 __ bind(notByte);
706 __ cmpl(rdx, stos);
707 __ jcc(Assembler::notEqual, notShort);
708 __ load_signed_short(rax, field_address);
709 __ jmp(xreturn_path);
711 __ bind(notShort);
712 __ cmpl(rdx, ctos);
713 __ jcc(Assembler::notEqual, notChar);
714 __ load_unsigned_short(rax, field_address);
715 __ jmp(xreturn_path);
717 __ bind(notChar);
718 #ifdef ASSERT
719 Label okay;
720 __ cmpl(rdx, atos);
721 __ jcc(Assembler::equal, okay);
722 __ cmpl(rdx, itos);
723 __ jcc(Assembler::equal, okay);
724 __ stop("what type is this?");
725 __ bind(okay);
726 #endif // ASSERT
727 // All the rest are a 32 bit wordsize
728 // This is ok for now. Since fast accessors should be going away
729 __ movptr(rax, field_address);
731 __ bind(xreturn_path);
733 // _ireturn/_areturn
734 __ pop(rdi); // get return address
735 __ mov(rsp, rsi); // set sp to sender sp
736 __ jmp(rdi);
738 // generate a vanilla interpreter entry as the slow path
739 __ bind(slow_path);
741 (void) generate_normal_entry(false);
742 return entry_point;
743 }
744 return NULL;
746 }
748 //
749 // Interpreter stub for calling a native method. (asm interpreter)
750 // This sets up a somewhat different looking stack for calling the native method
751 // than the typical interpreter frame setup.
752 //
754 address InterpreterGenerator::generate_native_entry(bool synchronized) {
755 // determine code generation flags
756 bool inc_counter = UseCompiler || CountCompiledCalls;
758 // rbx,: methodOop
759 // rsi: sender sp
760 // rsi: previous interpreter state (C++ interpreter) must preserve
761 address entry_point = __ pc();
764 const Address size_of_parameters(rbx, methodOopDesc::size_of_parameters_offset());
765 const Address invocation_counter(rbx, methodOopDesc::invocation_counter_offset() + InvocationCounter::counter_offset());
766 const Address access_flags (rbx, methodOopDesc::access_flags_offset());
768 // get parameter size (always needed)
769 __ load_unsigned_short(rcx, size_of_parameters);
771 // native calls don't need the stack size check since they have no expression stack
772 // and the arguments are already on the stack and we only add a handful of words
773 // to the stack
775 // rbx,: methodOop
776 // rcx: size of parameters
777 // rsi: sender sp
779 __ pop(rax); // get return address
780 // for natives the size of locals is zero
782 // compute beginning of parameters (rdi)
783 __ lea(rdi, Address(rsp, rcx, Interpreter::stackElementScale(), -wordSize));
786 // add 2 zero-initialized slots for native calls
787 // NULL result handler
788 __ push((int32_t)NULL_WORD);
789 // NULL oop temp (mirror or jni oop result)
790 __ push((int32_t)NULL_WORD);
792 if (inc_counter) __ movl(rcx, invocation_counter); // (pre-)fetch invocation count
793 // initialize fixed part of activation frame
795 generate_fixed_frame(true);
797 // make sure method is native & not abstract
798 #ifdef ASSERT
799 __ movl(rax, access_flags);
800 {
801 Label L;
802 __ testl(rax, JVM_ACC_NATIVE);
803 __ jcc(Assembler::notZero, L);
804 __ stop("tried to execute non-native method as native");
805 __ bind(L);
806 }
807 { Label L;
808 __ testl(rax, JVM_ACC_ABSTRACT);
809 __ jcc(Assembler::zero, L);
810 __ stop("tried to execute abstract method in interpreter");
811 __ bind(L);
812 }
813 #endif
815 // Since at this point in the method invocation the exception handler
816 // would try to exit the monitor of synchronized methods which hasn't
817 // been entered yet, we set the thread local variable
818 // _do_not_unlock_if_synchronized to true. The remove_activation will
819 // check this flag.
821 __ get_thread(rax);
822 const Address do_not_unlock_if_synchronized(rax,
823 in_bytes(JavaThread::do_not_unlock_if_synchronized_offset()));
824 __ movbool(do_not_unlock_if_synchronized, true);
826 // increment invocation count & check for overflow
827 Label invocation_counter_overflow;
828 if (inc_counter) {
829 generate_counter_incr(&invocation_counter_overflow, NULL, NULL);
830 }
832 Label continue_after_compile;
833 __ bind(continue_after_compile);
835 bang_stack_shadow_pages(true);
837 // reset the _do_not_unlock_if_synchronized flag
838 __ get_thread(rax);
839 __ movbool(do_not_unlock_if_synchronized, false);
841 // check for synchronized methods
842 // Must happen AFTER invocation_counter check and stack overflow check,
843 // so method is not locked if overflows.
844 //
845 if (synchronized) {
846 lock_method();
847 } else {
848 // no synchronization necessary
849 #ifdef ASSERT
850 { Label L;
851 __ movl(rax, access_flags);
852 __ testl(rax, JVM_ACC_SYNCHRONIZED);
853 __ jcc(Assembler::zero, L);
854 __ stop("method needs synchronization");
855 __ bind(L);
856 }
857 #endif
858 }
860 // start execution
861 #ifdef ASSERT
862 { Label L;
863 const Address monitor_block_top (rbp,
864 frame::interpreter_frame_monitor_block_top_offset * wordSize);
865 __ movptr(rax, monitor_block_top);
866 __ cmpptr(rax, rsp);
867 __ jcc(Assembler::equal, L);
868 __ stop("broken stack frame setup in interpreter");
869 __ bind(L);
870 }
871 #endif
873 // jvmti/dtrace support
874 __ notify_method_entry();
876 // work registers
877 const Register method = rbx;
878 const Register thread = rdi;
879 const Register t = rcx;
881 // allocate space for parameters
882 __ get_method(method);
883 __ verify_oop(method);
884 __ load_unsigned_short(t, Address(method, methodOopDesc::size_of_parameters_offset()));
885 __ shlptr(t, Interpreter::logStackElementSize());
886 __ addptr(t, 2*wordSize); // allocate two more slots for JNIEnv and possible mirror
887 __ subptr(rsp, t);
888 __ andptr(rsp, -(StackAlignmentInBytes)); // gcc needs 16 byte aligned stacks to do XMM intrinsics
890 // get signature handler
891 { Label L;
892 __ movptr(t, Address(method, methodOopDesc::signature_handler_offset()));
893 __ testptr(t, t);
894 __ jcc(Assembler::notZero, L);
895 __ call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::prepare_native_call), method);
896 __ get_method(method);
897 __ movptr(t, Address(method, methodOopDesc::signature_handler_offset()));
898 __ bind(L);
899 }
901 // call signature handler
902 assert(InterpreterRuntime::SignatureHandlerGenerator::from() == rdi, "adjust this code");
903 assert(InterpreterRuntime::SignatureHandlerGenerator::to () == rsp, "adjust this code");
904 assert(InterpreterRuntime::SignatureHandlerGenerator::temp() == t , "adjust this code");
905 // The generated handlers do not touch RBX (the method oop).
906 // However, large signatures cannot be cached and are generated
907 // each time here. The slow-path generator will blow RBX
908 // sometime, so we must reload it after the call.
909 __ call(t);
910 __ get_method(method); // slow path call blows RBX on DevStudio 5.0
912 // result handler is in rax,
913 // set result handler
914 __ movptr(Address(rbp, frame::interpreter_frame_result_handler_offset*wordSize), rax);
916 // pass mirror handle if static call
917 { Label L;
918 const int mirror_offset = klassOopDesc::klass_part_offset_in_bytes() + Klass::java_mirror_offset_in_bytes();
919 __ movl(t, Address(method, methodOopDesc::access_flags_offset()));
920 __ testl(t, JVM_ACC_STATIC);
921 __ jcc(Assembler::zero, L);
922 // get mirror
923 __ movptr(t, Address(method, methodOopDesc:: constants_offset()));
924 __ movptr(t, Address(t, constantPoolOopDesc::pool_holder_offset_in_bytes()));
925 __ movptr(t, Address(t, mirror_offset));
926 // copy mirror into activation frame
927 __ movptr(Address(rbp, frame::interpreter_frame_oop_temp_offset * wordSize), t);
928 // pass handle to mirror
929 __ lea(t, Address(rbp, frame::interpreter_frame_oop_temp_offset * wordSize));
930 __ movptr(Address(rsp, wordSize), t);
931 __ bind(L);
932 }
934 // get native function entry point
935 { Label L;
936 __ movptr(rax, Address(method, methodOopDesc::native_function_offset()));
937 ExternalAddress unsatisfied(SharedRuntime::native_method_throw_unsatisfied_link_error_entry());
938 __ cmpptr(rax, unsatisfied.addr());
939 __ jcc(Assembler::notEqual, L);
940 __ call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::prepare_native_call), method);
941 __ get_method(method);
942 __ verify_oop(method);
943 __ movptr(rax, Address(method, methodOopDesc::native_function_offset()));
944 __ bind(L);
945 }
947 // pass JNIEnv
948 __ get_thread(thread);
949 __ lea(t, Address(thread, JavaThread::jni_environment_offset()));
950 __ movptr(Address(rsp, 0), t);
952 // set_last_Java_frame_before_call
953 // It is enough that the pc()
954 // points into the right code segment. It does not have to be the correct return pc.
955 __ set_last_Java_frame(thread, noreg, rbp, __ pc());
957 // change thread state
958 #ifdef ASSERT
959 { Label L;
960 __ movl(t, Address(thread, JavaThread::thread_state_offset()));
961 __ cmpl(t, _thread_in_Java);
962 __ jcc(Assembler::equal, L);
963 __ stop("Wrong thread state in native stub");
964 __ bind(L);
965 }
966 #endif
968 // Change state to native
969 __ movl(Address(thread, JavaThread::thread_state_offset()), _thread_in_native);
970 __ call(rax);
972 // result potentially in rdx:rax or ST0
974 // Either restore the MXCSR register after returning from the JNI Call
975 // or verify that it wasn't changed.
976 if (VM_Version::supports_sse()) {
977 if (RestoreMXCSROnJNICalls) {
978 __ ldmxcsr(ExternalAddress(StubRoutines::addr_mxcsr_std()));
979 }
980 else if (CheckJNICalls ) {
981 __ call(RuntimeAddress(StubRoutines::x86::verify_mxcsr_entry()));
982 }
983 }
985 // Either restore the x87 floating pointer control word after returning
986 // from the JNI call or verify that it wasn't changed.
987 if (CheckJNICalls) {
988 __ call(RuntimeAddress(StubRoutines::x86::verify_fpu_cntrl_wrd_entry()));
989 }
991 // save potential result in ST(0) & rdx:rax
992 // (if result handler is the T_FLOAT or T_DOUBLE handler, result must be in ST0 -
993 // the check is necessary to avoid potential Intel FPU overflow problems by saving/restoring 'empty' FPU registers)
994 // It is safe to do this push because state is _thread_in_native and return address will be found
995 // via _last_native_pc and not via _last_jave_sp
997 // NOTE: the order of theses push(es) is known to frame::interpreter_frame_result.
998 // If the order changes or anything else is added to the stack the code in
999 // interpreter_frame_result will have to be changed.
1001 { Label L;
1002 Label push_double;
1003 ExternalAddress float_handler(AbstractInterpreter::result_handler(T_FLOAT));
1004 ExternalAddress double_handler(AbstractInterpreter::result_handler(T_DOUBLE));
1005 __ cmpptr(Address(rbp, (frame::interpreter_frame_oop_temp_offset + 1)*wordSize),
1006 float_handler.addr());
1007 __ jcc(Assembler::equal, push_double);
1008 __ cmpptr(Address(rbp, (frame::interpreter_frame_oop_temp_offset + 1)*wordSize),
1009 double_handler.addr());
1010 __ jcc(Assembler::notEqual, L);
1011 __ bind(push_double);
1012 __ push(dtos);
1013 __ bind(L);
1014 }
1015 __ push(ltos);
1017 // change thread state
1018 __ get_thread(thread);
1019 __ movl(Address(thread, JavaThread::thread_state_offset()), _thread_in_native_trans);
1020 if(os::is_MP()) {
1021 if (UseMembar) {
1022 // Force this write out before the read below
1023 __ membar(Assembler::Membar_mask_bits(
1024 Assembler::LoadLoad | Assembler::LoadStore |
1025 Assembler::StoreLoad | Assembler::StoreStore));
1026 } else {
1027 // Write serialization page so VM thread can do a pseudo remote membar.
1028 // We use the current thread pointer to calculate a thread specific
1029 // offset to write to within the page. This minimizes bus traffic
1030 // due to cache line collision.
1031 __ serialize_memory(thread, rcx);
1032 }
1033 }
1035 if (AlwaysRestoreFPU) {
1036 // Make sure the control word is correct.
1037 __ fldcw(ExternalAddress(StubRoutines::addr_fpu_cntrl_wrd_std()));
1038 }
1040 // check for safepoint operation in progress and/or pending suspend requests
1041 { Label Continue;
1043 __ cmp32(ExternalAddress(SafepointSynchronize::address_of_state()),
1044 SafepointSynchronize::_not_synchronized);
1046 Label L;
1047 __ jcc(Assembler::notEqual, L);
1048 __ cmpl(Address(thread, JavaThread::suspend_flags_offset()), 0);
1049 __ jcc(Assembler::equal, Continue);
1050 __ bind(L);
1052 // Don't use call_VM as it will see a possible pending exception and forward it
1053 // and never return here preventing us from clearing _last_native_pc down below.
1054 // Also can't use call_VM_leaf either as it will check to see if rsi & rdi are
1055 // preserved and correspond to the bcp/locals pointers. So we do a runtime call
1056 // by hand.
1057 //
1058 __ push(thread);
1059 __ call(RuntimeAddress(CAST_FROM_FN_PTR(address,
1060 JavaThread::check_special_condition_for_native_trans)));
1061 __ increment(rsp, wordSize);
1062 __ get_thread(thread);
1064 __ bind(Continue);
1065 }
1067 // change thread state
1068 __ movl(Address(thread, JavaThread::thread_state_offset()), _thread_in_Java);
1070 __ reset_last_Java_frame(thread, true, true);
1072 // reset handle block
1073 __ movptr(t, Address(thread, JavaThread::active_handles_offset()));
1074 __ movptr(Address(t, JNIHandleBlock::top_offset_in_bytes()), NULL_WORD);
1076 // If result was an oop then unbox and save it in the frame
1077 { Label L;
1078 Label no_oop, store_result;
1079 ExternalAddress handler(AbstractInterpreter::result_handler(T_OBJECT));
1080 __ cmpptr(Address(rbp, frame::interpreter_frame_result_handler_offset*wordSize),
1081 handler.addr());
1082 __ jcc(Assembler::notEqual, no_oop);
1083 __ cmpptr(Address(rsp, 0), (int32_t)NULL_WORD);
1084 __ pop(ltos);
1085 __ testptr(rax, rax);
1086 __ jcc(Assembler::zero, store_result);
1087 // unbox
1088 __ movptr(rax, Address(rax, 0));
1089 __ bind(store_result);
1090 __ movptr(Address(rbp, (frame::interpreter_frame_oop_temp_offset)*wordSize), rax);
1091 // keep stack depth as expected by pushing oop which will eventually be discarded
1092 __ push(ltos);
1093 __ bind(no_oop);
1094 }
1096 {
1097 Label no_reguard;
1098 __ cmpl(Address(thread, JavaThread::stack_guard_state_offset()), JavaThread::stack_guard_yellow_disabled);
1099 __ jcc(Assembler::notEqual, no_reguard);
1101 __ pusha();
1102 __ call(RuntimeAddress(CAST_FROM_FN_PTR(address, SharedRuntime::reguard_yellow_pages)));
1103 __ popa();
1105 __ bind(no_reguard);
1106 }
1108 // restore rsi to have legal interpreter frame,
1109 // i.e., bci == 0 <=> rsi == code_base()
1110 // Can't call_VM until bcp is within reasonable.
1111 __ get_method(method); // method is junk from thread_in_native to now.
1112 __ verify_oop(method);
1113 __ movptr(rsi, Address(method,methodOopDesc::const_offset())); // get constMethodOop
1114 __ lea(rsi, Address(rsi,constMethodOopDesc::codes_offset())); // get codebase
1116 // handle exceptions (exception handling will handle unlocking!)
1117 { Label L;
1118 __ cmpptr(Address(thread, Thread::pending_exception_offset()), (int32_t)NULL_WORD);
1119 __ jcc(Assembler::zero, L);
1120 // Note: At some point we may want to unify this with the code used in call_VM_base();
1121 // i.e., we should use the StubRoutines::forward_exception code. For now this
1122 // doesn't work here because the rsp is not correctly set at this point.
1123 __ MacroAssembler::call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::throw_pending_exception));
1124 __ should_not_reach_here();
1125 __ bind(L);
1126 }
1128 // do unlocking if necessary
1129 { Label L;
1130 __ movl(t, Address(method, methodOopDesc::access_flags_offset()));
1131 __ testl(t, JVM_ACC_SYNCHRONIZED);
1132 __ jcc(Assembler::zero, L);
1133 // the code below should be shared with interpreter macro assembler implementation
1134 { Label unlock;
1135 // BasicObjectLock will be first in list, since this is a synchronized method. However, need
1136 // to check that the object has not been unlocked by an explicit monitorexit bytecode.
1137 const Address monitor(rbp, frame::interpreter_frame_initial_sp_offset * wordSize - (int)sizeof(BasicObjectLock));
1139 __ lea(rdx, monitor); // address of first monitor
1141 __ movptr(t, Address(rdx, BasicObjectLock::obj_offset_in_bytes()));
1142 __ testptr(t, t);
1143 __ jcc(Assembler::notZero, unlock);
1145 // Entry already unlocked, need to throw exception
1146 __ MacroAssembler::call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::throw_illegal_monitor_state_exception));
1147 __ should_not_reach_here();
1149 __ bind(unlock);
1150 __ unlock_object(rdx);
1151 }
1152 __ bind(L);
1153 }
1155 // jvmti/dtrace support
1156 // Note: This must happen _after_ handling/throwing any exceptions since
1157 // the exception handler code notifies the runtime of method exits
1158 // too. If this happens before, method entry/exit notifications are
1159 // not properly paired (was bug - gri 11/22/99).
1160 __ notify_method_exit(vtos, InterpreterMacroAssembler::NotifyJVMTI);
1162 // restore potential result in rdx:rax, call result handler to restore potential result in ST0 & handle result
1163 __ pop(ltos);
1164 __ movptr(t, Address(rbp, frame::interpreter_frame_result_handler_offset*wordSize));
1165 __ call(t);
1167 // remove activation
1168 __ movptr(t, Address(rbp, frame::interpreter_frame_sender_sp_offset * wordSize)); // get sender sp
1169 __ leave(); // remove frame anchor
1170 __ pop(rdi); // get return address
1171 __ mov(rsp, t); // set sp to sender sp
1172 __ jmp(rdi);
1174 if (inc_counter) {
1175 // Handle overflow of counter and compile method
1176 __ bind(invocation_counter_overflow);
1177 generate_counter_overflow(&continue_after_compile);
1178 }
1180 return entry_point;
1181 }
1183 //
1184 // Generic interpreted method entry to (asm) interpreter
1185 //
1186 address InterpreterGenerator::generate_normal_entry(bool synchronized) {
1187 // determine code generation flags
1188 bool inc_counter = UseCompiler || CountCompiledCalls;
1190 // rbx,: methodOop
1191 // rsi: sender sp
1192 address entry_point = __ pc();
1195 const Address size_of_parameters(rbx, methodOopDesc::size_of_parameters_offset());
1196 const Address size_of_locals (rbx, methodOopDesc::size_of_locals_offset());
1197 const Address invocation_counter(rbx, methodOopDesc::invocation_counter_offset() + InvocationCounter::counter_offset());
1198 const Address access_flags (rbx, methodOopDesc::access_flags_offset());
1200 // get parameter size (always needed)
1201 __ load_unsigned_short(rcx, size_of_parameters);
1203 // rbx,: methodOop
1204 // rcx: size of parameters
1206 // rsi: sender_sp (could differ from sp+wordSize if we were called via c2i )
1208 __ load_unsigned_short(rdx, size_of_locals); // get size of locals in words
1209 __ subl(rdx, rcx); // rdx = no. of additional locals
1211 // see if we've got enough room on the stack for locals plus overhead.
1212 generate_stack_overflow_check();
1214 // get return address
1215 __ pop(rax);
1217 // compute beginning of parameters (rdi)
1218 __ lea(rdi, Address(rsp, rcx, Interpreter::stackElementScale(), -wordSize));
1220 // rdx - # of additional locals
1221 // allocate space for locals
1222 // explicitly initialize locals
1223 {
1224 Label exit, loop;
1225 __ testl(rdx, rdx);
1226 __ jcc(Assembler::lessEqual, exit); // do nothing if rdx <= 0
1227 __ bind(loop);
1228 if (TaggedStackInterpreter) {
1229 __ push((int32_t)NULL_WORD); // push tag
1230 }
1231 __ push((int32_t)NULL_WORD); // initialize local variables
1232 __ decrement(rdx); // until everything initialized
1233 __ jcc(Assembler::greater, loop);
1234 __ bind(exit);
1235 }
1237 if (inc_counter) __ movl(rcx, invocation_counter); // (pre-)fetch invocation count
1238 // initialize fixed part of activation frame
1239 generate_fixed_frame(false);
1241 // make sure method is not native & not abstract
1242 #ifdef ASSERT
1243 __ movl(rax, access_flags);
1244 {
1245 Label L;
1246 __ testl(rax, JVM_ACC_NATIVE);
1247 __ jcc(Assembler::zero, L);
1248 __ stop("tried to execute native method as non-native");
1249 __ bind(L);
1250 }
1251 { Label L;
1252 __ testl(rax, JVM_ACC_ABSTRACT);
1253 __ jcc(Assembler::zero, L);
1254 __ stop("tried to execute abstract method in interpreter");
1255 __ bind(L);
1256 }
1257 #endif
1259 // Since at this point in the method invocation the exception handler
1260 // would try to exit the monitor of synchronized methods which hasn't
1261 // been entered yet, we set the thread local variable
1262 // _do_not_unlock_if_synchronized to true. The remove_activation will
1263 // check this flag.
1265 __ get_thread(rax);
1266 const Address do_not_unlock_if_synchronized(rax,
1267 in_bytes(JavaThread::do_not_unlock_if_synchronized_offset()));
1268 __ movbool(do_not_unlock_if_synchronized, true);
1270 // increment invocation count & check for overflow
1271 Label invocation_counter_overflow;
1272 Label profile_method;
1273 Label profile_method_continue;
1274 if (inc_counter) {
1275 generate_counter_incr(&invocation_counter_overflow, &profile_method, &profile_method_continue);
1276 if (ProfileInterpreter) {
1277 __ bind(profile_method_continue);
1278 }
1279 }
1280 Label continue_after_compile;
1281 __ bind(continue_after_compile);
1283 bang_stack_shadow_pages(false);
1285 // reset the _do_not_unlock_if_synchronized flag
1286 __ get_thread(rax);
1287 __ movbool(do_not_unlock_if_synchronized, false);
1289 // check for synchronized methods
1290 // Must happen AFTER invocation_counter check and stack overflow check,
1291 // so method is not locked if overflows.
1292 //
1293 if (synchronized) {
1294 // Allocate monitor and lock method
1295 lock_method();
1296 } else {
1297 // no synchronization necessary
1298 #ifdef ASSERT
1299 { Label L;
1300 __ movl(rax, access_flags);
1301 __ testl(rax, JVM_ACC_SYNCHRONIZED);
1302 __ jcc(Assembler::zero, L);
1303 __ stop("method needs synchronization");
1304 __ bind(L);
1305 }
1306 #endif
1307 }
1309 // start execution
1310 #ifdef ASSERT
1311 { Label L;
1312 const Address monitor_block_top (rbp,
1313 frame::interpreter_frame_monitor_block_top_offset * wordSize);
1314 __ movptr(rax, monitor_block_top);
1315 __ cmpptr(rax, rsp);
1316 __ jcc(Assembler::equal, L);
1317 __ stop("broken stack frame setup in interpreter");
1318 __ bind(L);
1319 }
1320 #endif
1322 // jvmti support
1323 __ notify_method_entry();
1325 __ dispatch_next(vtos);
1327 // invocation counter overflow
1328 if (inc_counter) {
1329 if (ProfileInterpreter) {
1330 // We have decided to profile this method in the interpreter
1331 __ bind(profile_method);
1333 __ call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::profile_method), rsi, true);
1335 __ movptr(rbx, Address(rbp, method_offset)); // restore methodOop
1336 __ movptr(rax, Address(rbx, in_bytes(methodOopDesc::method_data_offset())));
1337 __ movptr(Address(rbp, frame::interpreter_frame_mdx_offset * wordSize), rax);
1338 __ test_method_data_pointer(rax, profile_method_continue);
1339 __ addptr(rax, in_bytes(methodDataOopDesc::data_offset()));
1340 __ movptr(Address(rbp, frame::interpreter_frame_mdx_offset * wordSize), rax);
1341 __ jmp(profile_method_continue);
1342 }
1343 // Handle overflow of counter and compile method
1344 __ bind(invocation_counter_overflow);
1345 generate_counter_overflow(&continue_after_compile);
1346 }
1348 return entry_point;
1349 }
1351 //------------------------------------------------------------------------------------------------------------------------
1352 // Entry points
1353 //
1354 // Here we generate the various kind of entries into the interpreter.
1355 // The two main entry type are generic bytecode methods and native call method.
1356 // These both come in synchronized and non-synchronized versions but the
1357 // frame layout they create is very similar. The other method entry
1358 // types are really just special purpose entries that are really entry
1359 // and interpretation all in one. These are for trivial methods like
1360 // accessor, empty, or special math methods.
1361 //
1362 // When control flow reaches any of the entry types for the interpreter
1363 // the following holds ->
1364 //
1365 // Arguments:
1366 //
1367 // rbx,: methodOop
1368 // rcx: receiver
1369 //
1370 //
1371 // Stack layout immediately at entry
1372 //
1373 // [ return address ] <--- rsp
1374 // [ parameter n ]
1375 // ...
1376 // [ parameter 1 ]
1377 // [ expression stack ] (caller's java expression stack)
1379 // Assuming that we don't go to one of the trivial specialized
1380 // entries the stack will look like below when we are ready to execute
1381 // the first bytecode (or call the native routine). The register usage
1382 // will be as the template based interpreter expects (see interpreter_x86.hpp).
1383 //
1384 // local variables follow incoming parameters immediately; i.e.
1385 // the return address is moved to the end of the locals).
1386 //
1387 // [ monitor entry ] <--- rsp
1388 // ...
1389 // [ monitor entry ]
1390 // [ expr. stack bottom ]
1391 // [ saved rsi ]
1392 // [ current rdi ]
1393 // [ methodOop ]
1394 // [ saved rbp, ] <--- rbp,
1395 // [ return address ]
1396 // [ local variable m ]
1397 // ...
1398 // [ local variable 1 ]
1399 // [ parameter n ]
1400 // ...
1401 // [ parameter 1 ] <--- rdi
1403 address AbstractInterpreterGenerator::generate_method_entry(AbstractInterpreter::MethodKind kind) {
1404 // determine code generation flags
1405 bool synchronized = false;
1406 address entry_point = NULL;
1408 switch (kind) {
1409 case Interpreter::zerolocals : break;
1410 case Interpreter::zerolocals_synchronized: synchronized = true; break;
1411 case Interpreter::native : entry_point = ((InterpreterGenerator*)this)->generate_native_entry(false); break;
1412 case Interpreter::native_synchronized : entry_point = ((InterpreterGenerator*)this)->generate_native_entry(true); break;
1413 case Interpreter::empty : entry_point = ((InterpreterGenerator*)this)->generate_empty_entry(); break;
1414 case Interpreter::accessor : entry_point = ((InterpreterGenerator*)this)->generate_accessor_entry(); break;
1415 case Interpreter::abstract : entry_point = ((InterpreterGenerator*)this)->generate_abstract_entry(); break;
1416 case Interpreter::method_handle : entry_point = ((InterpreterGenerator*)this)->generate_method_handle_entry(); break;
1418 case Interpreter::java_lang_math_sin : // fall thru
1419 case Interpreter::java_lang_math_cos : // fall thru
1420 case Interpreter::java_lang_math_tan : // fall thru
1421 case Interpreter::java_lang_math_abs : // fall thru
1422 case Interpreter::java_lang_math_log : // fall thru
1423 case Interpreter::java_lang_math_log10 : // fall thru
1424 case Interpreter::java_lang_math_sqrt : entry_point = ((InterpreterGenerator*)this)->generate_math_entry(kind); break;
1425 default : ShouldNotReachHere(); break;
1426 }
1428 if (entry_point) return entry_point;
1430 return ((InterpreterGenerator*)this)->generate_normal_entry(synchronized);
1432 }
1434 // How much stack a method activation needs in words.
1435 int AbstractInterpreter::size_top_interpreter_activation(methodOop method) {
1437 const int stub_code = 4; // see generate_call_stub
1438 // Save space for one monitor to get into the interpreted method in case
1439 // the method is synchronized
1440 int monitor_size = method->is_synchronized() ?
1441 1*frame::interpreter_frame_monitor_size() : 0;
1443 // total overhead size: entry_size + (saved rbp, thru expr stack bottom).
1444 // be sure to change this if you add/subtract anything to/from the overhead area
1445 const int overhead_size = -frame::interpreter_frame_initial_sp_offset;
1447 const int extra_stack = methodOopDesc::extra_stack_entries();
1448 const int method_stack = (method->max_locals() + method->max_stack() + extra_stack) *
1449 Interpreter::stackElementWords();
1450 return overhead_size + method_stack + stub_code;
1451 }
1453 // asm based interpreter deoptimization helpers
1455 int AbstractInterpreter::layout_activation(methodOop method,
1456 int tempcount,
1457 int popframe_extra_args,
1458 int moncount,
1459 int callee_param_count,
1460 int callee_locals,
1461 frame* caller,
1462 frame* interpreter_frame,
1463 bool is_top_frame) {
1464 // Note: This calculation must exactly parallel the frame setup
1465 // in AbstractInterpreterGenerator::generate_method_entry.
1466 // If interpreter_frame!=NULL, set up the method, locals, and monitors.
1467 // The frame interpreter_frame, if not NULL, is guaranteed to be the right size,
1468 // as determined by a previous call to this method.
1469 // It is also guaranteed to be walkable even though it is in a skeletal state
1470 // NOTE: return size is in words not bytes
1472 // fixed size of an interpreter frame:
1473 int max_locals = method->max_locals() * Interpreter::stackElementWords();
1474 int extra_locals = (method->max_locals() - method->size_of_parameters()) *
1475 Interpreter::stackElementWords();
1477 int overhead = frame::sender_sp_offset - frame::interpreter_frame_initial_sp_offset;
1479 // Our locals were accounted for by the caller (or last_frame_adjust on the transistion)
1480 // Since the callee parameters already account for the callee's params we only need to account for
1481 // the extra locals.
1484 int size = overhead +
1485 ((callee_locals - callee_param_count)*Interpreter::stackElementWords()) +
1486 (moncount*frame::interpreter_frame_monitor_size()) +
1487 tempcount*Interpreter::stackElementWords() + popframe_extra_args;
1489 if (interpreter_frame != NULL) {
1490 #ifdef ASSERT
1491 if (!EnableMethodHandles)
1492 // @@@ FIXME: Should we correct interpreter_frame_sender_sp in the calling sequences?
1493 // Probably, since deoptimization doesn't work yet.
1494 assert(caller->unextended_sp() == interpreter_frame->interpreter_frame_sender_sp(), "Frame not properly walkable");
1495 assert(caller->sp() == interpreter_frame->sender_sp(), "Frame not properly walkable(2)");
1496 #endif
1498 interpreter_frame->interpreter_frame_set_method(method);
1499 // NOTE the difference in using sender_sp and interpreter_frame_sender_sp
1500 // interpreter_frame_sender_sp is the original sp of the caller (the unextended_sp)
1501 // and sender_sp is fp+8
1502 intptr_t* locals = interpreter_frame->sender_sp() + max_locals - 1;
1504 interpreter_frame->interpreter_frame_set_locals(locals);
1505 BasicObjectLock* montop = interpreter_frame->interpreter_frame_monitor_begin();
1506 BasicObjectLock* monbot = montop - moncount;
1507 interpreter_frame->interpreter_frame_set_monitor_end(monbot);
1509 // Set last_sp
1510 intptr_t* rsp = (intptr_t*) monbot -
1511 tempcount*Interpreter::stackElementWords() -
1512 popframe_extra_args;
1513 interpreter_frame->interpreter_frame_set_last_sp(rsp);
1515 // All frames but the initial (oldest) interpreter frame we fill in have a
1516 // value for sender_sp that allows walking the stack but isn't
1517 // truly correct. Correct the value here.
1519 if (extra_locals != 0 &&
1520 interpreter_frame->sender_sp() == interpreter_frame->interpreter_frame_sender_sp() ) {
1521 interpreter_frame->set_interpreter_frame_sender_sp(caller->sp() + extra_locals);
1522 }
1523 *interpreter_frame->interpreter_frame_cache_addr() =
1524 method->constants()->cache();
1525 }
1526 return size;
1527 }
1530 //------------------------------------------------------------------------------------------------------------------------
1531 // Exceptions
1533 void TemplateInterpreterGenerator::generate_throw_exception() {
1534 // Entry point in previous activation (i.e., if the caller was interpreted)
1535 Interpreter::_rethrow_exception_entry = __ pc();
1537 // Restore sp to interpreter_frame_last_sp even though we are going
1538 // to empty the expression stack for the exception processing.
1539 __ movptr(Address(rbp, frame::interpreter_frame_last_sp_offset * wordSize), NULL_WORD);
1540 // rax,: exception
1541 // rdx: return address/pc that threw exception
1542 __ restore_bcp(); // rsi points to call/send
1543 __ restore_locals();
1545 // Entry point for exceptions thrown within interpreter code
1546 Interpreter::_throw_exception_entry = __ pc();
1547 // expression stack is undefined here
1548 // rax,: exception
1549 // rsi: exception bcp
1550 __ verify_oop(rax);
1552 // expression stack must be empty before entering the VM in case of an exception
1553 __ empty_expression_stack();
1554 __ empty_FPU_stack();
1555 // find exception handler address and preserve exception oop
1556 __ call_VM(rdx, CAST_FROM_FN_PTR(address, InterpreterRuntime::exception_handler_for_exception), rax);
1557 // rax,: exception handler entry point
1558 // rdx: preserved exception oop
1559 // rsi: bcp for exception handler
1560 __ push_ptr(rdx); // push exception which is now the only value on the stack
1561 __ jmp(rax); // jump to exception handler (may be _remove_activation_entry!)
1563 // If the exception is not handled in the current frame the frame is removed and
1564 // the exception is rethrown (i.e. exception continuation is _rethrow_exception).
1565 //
1566 // Note: At this point the bci is still the bxi for the instruction which caused
1567 // the exception and the expression stack is empty. Thus, for any VM calls
1568 // at this point, GC will find a legal oop map (with empty expression stack).
1570 // In current activation
1571 // tos: exception
1572 // rsi: exception bcp
1574 //
1575 // JVMTI PopFrame support
1576 //
1578 Interpreter::_remove_activation_preserving_args_entry = __ pc();
1579 __ empty_expression_stack();
1580 __ empty_FPU_stack();
1581 // Set the popframe_processing bit in pending_popframe_condition indicating that we are
1582 // currently handling popframe, so that call_VMs that may happen later do not trigger new
1583 // popframe handling cycles.
1584 __ get_thread(rcx);
1585 __ movl(rdx, Address(rcx, JavaThread::popframe_condition_offset()));
1586 __ orl(rdx, JavaThread::popframe_processing_bit);
1587 __ movl(Address(rcx, JavaThread::popframe_condition_offset()), rdx);
1589 {
1590 // Check to see whether we are returning to a deoptimized frame.
1591 // (The PopFrame call ensures that the caller of the popped frame is
1592 // either interpreted or compiled and deoptimizes it if compiled.)
1593 // In this case, we can't call dispatch_next() after the frame is
1594 // popped, but instead must save the incoming arguments and restore
1595 // them after deoptimization has occurred.
1596 //
1597 // Note that we don't compare the return PC against the
1598 // deoptimization blob's unpack entry because of the presence of
1599 // adapter frames in C2.
1600 Label caller_not_deoptimized;
1601 __ movptr(rdx, Address(rbp, frame::return_addr_offset * wordSize));
1602 __ super_call_VM_leaf(CAST_FROM_FN_PTR(address, InterpreterRuntime::interpreter_contains), rdx);
1603 __ testl(rax, rax);
1604 __ jcc(Assembler::notZero, caller_not_deoptimized);
1606 // Compute size of arguments for saving when returning to deoptimized caller
1607 __ get_method(rax);
1608 __ verify_oop(rax);
1609 __ load_unsigned_short(rax, Address(rax, in_bytes(methodOopDesc::size_of_parameters_offset())));
1610 __ shlptr(rax, Interpreter::logStackElementSize());
1611 __ restore_locals();
1612 __ subptr(rdi, rax);
1613 __ addptr(rdi, wordSize);
1614 // Save these arguments
1615 __ get_thread(rcx);
1616 __ super_call_VM_leaf(CAST_FROM_FN_PTR(address, Deoptimization::popframe_preserve_args), rcx, rax, rdi);
1618 __ remove_activation(vtos, rdx,
1619 /* throw_monitor_exception */ false,
1620 /* install_monitor_exception */ false,
1621 /* notify_jvmdi */ false);
1623 // Inform deoptimization that it is responsible for restoring these arguments
1624 __ get_thread(rcx);
1625 __ movl(Address(rcx, JavaThread::popframe_condition_offset()), JavaThread::popframe_force_deopt_reexecution_bit);
1627 // Continue in deoptimization handler
1628 __ jmp(rdx);
1630 __ bind(caller_not_deoptimized);
1631 }
1633 __ remove_activation(vtos, rdx,
1634 /* throw_monitor_exception */ false,
1635 /* install_monitor_exception */ false,
1636 /* notify_jvmdi */ false);
1638 // Finish with popframe handling
1639 // A previous I2C followed by a deoptimization might have moved the
1640 // outgoing arguments further up the stack. PopFrame expects the
1641 // mutations to those outgoing arguments to be preserved and other
1642 // constraints basically require this frame to look exactly as
1643 // though it had previously invoked an interpreted activation with
1644 // no space between the top of the expression stack (current
1645 // last_sp) and the top of stack. Rather than force deopt to
1646 // maintain this kind of invariant all the time we call a small
1647 // fixup routine to move the mutated arguments onto the top of our
1648 // expression stack if necessary.
1649 __ mov(rax, rsp);
1650 __ movptr(rbx, Address(rbp, frame::interpreter_frame_last_sp_offset * wordSize));
1651 __ get_thread(rcx);
1652 // PC must point into interpreter here
1653 __ set_last_Java_frame(rcx, noreg, rbp, __ pc());
1654 __ super_call_VM_leaf(CAST_FROM_FN_PTR(address, InterpreterRuntime::popframe_move_outgoing_args), rcx, rax, rbx);
1655 __ get_thread(rcx);
1656 __ reset_last_Java_frame(rcx, true, true);
1657 // Restore the last_sp and null it out
1658 __ movptr(rsp, Address(rbp, frame::interpreter_frame_last_sp_offset * wordSize));
1659 __ movptr(Address(rbp, frame::interpreter_frame_last_sp_offset * wordSize), NULL_WORD);
1661 __ restore_bcp();
1662 __ restore_locals();
1663 // The method data pointer was incremented already during
1664 // call profiling. We have to restore the mdp for the current bcp.
1665 if (ProfileInterpreter) {
1666 __ set_method_data_pointer_for_bcp();
1667 }
1669 // Clear the popframe condition flag
1670 __ get_thread(rcx);
1671 __ movl(Address(rcx, JavaThread::popframe_condition_offset()), JavaThread::popframe_inactive);
1673 __ dispatch_next(vtos);
1674 // end of PopFrame support
1676 Interpreter::_remove_activation_entry = __ pc();
1678 // preserve exception over this code sequence
1679 __ pop_ptr(rax);
1680 __ get_thread(rcx);
1681 __ movptr(Address(rcx, JavaThread::vm_result_offset()), rax);
1682 // remove the activation (without doing throws on illegalMonitorExceptions)
1683 __ remove_activation(vtos, rdx, false, true, false);
1684 // restore exception
1685 __ get_thread(rcx);
1686 __ movptr(rax, Address(rcx, JavaThread::vm_result_offset()));
1687 __ movptr(Address(rcx, JavaThread::vm_result_offset()), NULL_WORD);
1688 __ verify_oop(rax);
1690 // Inbetween activations - previous activation type unknown yet
1691 // compute continuation point - the continuation point expects
1692 // the following registers set up:
1693 //
1694 // rax,: exception
1695 // rdx: return address/pc that threw exception
1696 // rsp: expression stack of caller
1697 // rbp,: rbp, of caller
1698 __ push(rax); // save exception
1699 __ push(rdx); // save return address
1700 __ super_call_VM_leaf(CAST_FROM_FN_PTR(address, SharedRuntime::exception_handler_for_return_address), rdx);
1701 __ mov(rbx, rax); // save exception handler
1702 __ pop(rdx); // restore return address
1703 __ pop(rax); // restore exception
1704 // Note that an "issuing PC" is actually the next PC after the call
1705 __ jmp(rbx); // jump to exception handler of caller
1706 }
1709 //
1710 // JVMTI ForceEarlyReturn support
1711 //
1712 address TemplateInterpreterGenerator::generate_earlyret_entry_for(TosState state) {
1713 address entry = __ pc();
1715 __ restore_bcp();
1716 __ restore_locals();
1717 __ empty_expression_stack();
1718 __ empty_FPU_stack();
1719 __ load_earlyret_value(state);
1721 __ get_thread(rcx);
1722 __ movptr(rcx, Address(rcx, JavaThread::jvmti_thread_state_offset()));
1723 const Address cond_addr(rcx, JvmtiThreadState::earlyret_state_offset());
1725 // Clear the earlyret state
1726 __ movl(cond_addr, JvmtiThreadState::earlyret_inactive);
1728 __ remove_activation(state, rsi,
1729 false, /* throw_monitor_exception */
1730 false, /* install_monitor_exception */
1731 true); /* notify_jvmdi */
1732 __ jmp(rsi);
1733 return entry;
1734 } // end of ForceEarlyReturn support
1737 //------------------------------------------------------------------------------------------------------------------------
1738 // Helper for vtos entry point generation
1740 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) {
1741 assert(t->is_valid() && t->tos_in() == vtos, "illegal template");
1742 Label L;
1743 fep = __ pc(); __ push(ftos); __ jmp(L);
1744 dep = __ pc(); __ push(dtos); __ jmp(L);
1745 lep = __ pc(); __ push(ltos); __ jmp(L);
1746 aep = __ pc(); __ push(atos); __ jmp(L);
1747 bep = cep = sep = // fall through
1748 iep = __ pc(); __ push(itos); // fall through
1749 vep = __ pc(); __ bind(L); // fall through
1750 generate_and_dispatch(t);
1751 }
1753 //------------------------------------------------------------------------------------------------------------------------
1754 // Generation of individual instructions
1756 // helpers for generate_and_dispatch
1760 InterpreterGenerator::InterpreterGenerator(StubQueue* code)
1761 : TemplateInterpreterGenerator(code) {
1762 generate_all(); // down here so it can be "virtual"
1763 }
1765 //------------------------------------------------------------------------------------------------------------------------
1767 // Non-product code
1768 #ifndef PRODUCT
1769 address TemplateInterpreterGenerator::generate_trace_code(TosState state) {
1770 address entry = __ pc();
1772 // prepare expression stack
1773 __ pop(rcx); // pop return address so expression stack is 'pure'
1774 __ push(state); // save tosca
1776 // pass tosca registers as arguments & call tracer
1777 __ call_VM(noreg, CAST_FROM_FN_PTR(address, SharedRuntime::trace_bytecode), rcx, rax, rdx);
1778 __ mov(rcx, rax); // make sure return address is not destroyed by pop(state)
1779 __ pop(state); // restore tosca
1781 // return
1782 __ jmp(rcx);
1784 return entry;
1785 }
1788 void TemplateInterpreterGenerator::count_bytecode() {
1789 __ incrementl(ExternalAddress((address) &BytecodeCounter::_counter_value));
1790 }
1793 void TemplateInterpreterGenerator::histogram_bytecode(Template* t) {
1794 __ incrementl(ExternalAddress((address) &BytecodeHistogram::_counters[t->bytecode()]));
1795 }
1798 void TemplateInterpreterGenerator::histogram_bytecode_pair(Template* t) {
1799 __ mov32(ExternalAddress((address) &BytecodePairHistogram::_index), rbx);
1800 __ shrl(rbx, BytecodePairHistogram::log2_number_of_codes);
1801 __ orl(rbx, ((int)t->bytecode()) << BytecodePairHistogram::log2_number_of_codes);
1802 ExternalAddress table((address) BytecodePairHistogram::_counters);
1803 Address index(noreg, rbx, Address::times_4);
1804 __ incrementl(ArrayAddress(table, index));
1805 }
1808 void TemplateInterpreterGenerator::trace_bytecode(Template* t) {
1809 // Call a little run-time stub to avoid blow-up for each bytecode.
1810 // The run-time runtime saves the right registers, depending on
1811 // the tosca in-state for the given template.
1812 assert(Interpreter::trace_code(t->tos_in()) != NULL,
1813 "entry must have been generated");
1814 __ call(RuntimeAddress(Interpreter::trace_code(t->tos_in())));
1815 }
1818 void TemplateInterpreterGenerator::stop_interpreter_at() {
1819 Label L;
1820 __ cmp32(ExternalAddress((address) &BytecodeCounter::_counter_value),
1821 StopInterpreterAt);
1822 __ jcc(Assembler::notEqual, L);
1823 __ int3();
1824 __ bind(L);
1825 }
1826 #endif // !PRODUCT
1827 #endif // CC_INTERP
