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src/cpu/x86/vm/templateInterpreter_x86_32.cpp@0fbdb4381b99
src/cpu/x86/vm/templateInterpreter_x86_32.cpp
Mon, 09 Mar 2009 13:28:46 -0700
- author
- xdono
- date
- Mon, 09 Mar 2009 13:28:46 -0700
- changeset 1014
- 0fbdb4381b99
- parent 968
- dc3ad84615cf
- child 1063
- 7bb995fbd3c0
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6814575: Update copyright year
Summary: Update copyright for files that have been modified in 2009, up to 03/09
Reviewed-by: katleman, tbell, ohair
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 address TemplateInterpreterGenerator::generate_exception_handler_common(const char* name, const char* message, bool pass_oop) {
96 assert(!pass_oop || message == NULL, "either oop or message but not both");
97 address entry = __ pc();
98 if (pass_oop) {
99 // object is at TOS
100 __ pop(rbx);
101 }
102 // expression stack must be empty before entering the VM if an exception happened
103 __ empty_expression_stack();
104 __ empty_FPU_stack();
105 // setup parameters
106 __ lea(rax, ExternalAddress((address)name));
107 if (pass_oop) {
108 __ call_VM(rax, CAST_FROM_FN_PTR(address, InterpreterRuntime::create_klass_exception), rax, rbx);
109 } else {
110 if (message != NULL) {
111 __ lea(rbx, ExternalAddress((address)message));
112 } else {
113 __ movptr(rbx, NULL_WORD);
114 }
115 __ call_VM(rax, CAST_FROM_FN_PTR(address, InterpreterRuntime::create_exception), rax, rbx);
116 }
117 // throw exception
118 __ jump(ExternalAddress(Interpreter::throw_exception_entry()));
119 return entry;
120 }
123 address TemplateInterpreterGenerator::generate_continuation_for(TosState state) {
124 address entry = __ pc();
125 // NULL last_sp until next java call
126 __ movptr(Address(rbp, frame::interpreter_frame_last_sp_offset * wordSize), NULL_WORD);
127 __ dispatch_next(state);
128 return entry;
129 }
132 address TemplateInterpreterGenerator::generate_return_entry_for(TosState state, int step) {
133 Label interpreter_entry;
134 address compiled_entry = __ pc();
136 #ifdef COMPILER2
137 // The FPU stack is clean if UseSSE >= 2 but must be cleaned in other cases
138 if ((state == ftos && UseSSE < 1) || (state == dtos && UseSSE < 2)) {
139 for (int i = 1; i < 8; i++) {
140 __ ffree(i);
141 }
142 } else if (UseSSE < 2) {
143 __ empty_FPU_stack();
144 }
145 #endif
146 if ((state == ftos && UseSSE < 1) || (state == dtos && UseSSE < 2)) {
147 __ MacroAssembler::verify_FPU(1, "generate_return_entry_for compiled");
148 } else {
149 __ MacroAssembler::verify_FPU(0, "generate_return_entry_for compiled");
150 }
152 __ jmp(interpreter_entry, relocInfo::none);
153 // emit a sentinel we can test for when converting an interpreter
154 // entry point to a compiled entry point.
155 __ a_long(Interpreter::return_sentinel);
156 __ a_long((int)compiled_entry);
157 address entry = __ pc();
158 __ bind(interpreter_entry);
160 // In SSE mode, interpreter returns FP results in xmm0 but they need
161 // to end up back on the FPU so it can operate on them.
162 if (state == ftos && UseSSE >= 1) {
163 __ subptr(rsp, wordSize);
164 __ movflt(Address(rsp, 0), xmm0);
165 __ fld_s(Address(rsp, 0));
166 __ addptr(rsp, wordSize);
167 } else if (state == dtos && UseSSE >= 2) {
168 __ subptr(rsp, 2*wordSize);
169 __ movdbl(Address(rsp, 0), xmm0);
170 __ fld_d(Address(rsp, 0));
171 __ addptr(rsp, 2*wordSize);
172 }
174 __ MacroAssembler::verify_FPU(state == ftos || state == dtos ? 1 : 0, "generate_return_entry_for in interpreter");
176 // Restore stack bottom in case i2c adjusted stack
177 __ movptr(rsp, Address(rbp, frame::interpreter_frame_last_sp_offset * wordSize));
178 // and NULL it as marker that rsp is now tos until next java call
179 __ movptr(Address(rbp, frame::interpreter_frame_last_sp_offset * wordSize), NULL_WORD);
181 __ restore_bcp();
182 __ restore_locals();
183 __ get_cache_and_index_at_bcp(rbx, rcx, 1);
184 __ movl(rbx, Address(rbx, rcx,
185 Address::times_ptr, constantPoolCacheOopDesc::base_offset() +
186 ConstantPoolCacheEntry::flags_offset()));
187 __ andptr(rbx, 0xFF);
188 __ lea(rsp, Address(rsp, rbx, Interpreter::stackElementScale()));
189 __ dispatch_next(state, step);
190 return entry;
191 }
194 address TemplateInterpreterGenerator::generate_deopt_entry_for(TosState state, int step) {
195 address entry = __ pc();
197 // In SSE mode, FP results are in xmm0
198 if (state == ftos && UseSSE > 0) {
199 __ subptr(rsp, wordSize);
200 __ movflt(Address(rsp, 0), xmm0);
201 __ fld_s(Address(rsp, 0));
202 __ addptr(rsp, wordSize);
203 } else if (state == dtos && UseSSE >= 2) {
204 __ subptr(rsp, 2*wordSize);
205 __ movdbl(Address(rsp, 0), xmm0);
206 __ fld_d(Address(rsp, 0));
207 __ addptr(rsp, 2*wordSize);
208 }
210 __ MacroAssembler::verify_FPU(state == ftos || state == dtos ? 1 : 0, "generate_deopt_entry_for in interpreter");
212 // The stack is not extended by deopt but we must NULL last_sp as this
213 // entry is like a "return".
214 __ movptr(Address(rbp, frame::interpreter_frame_last_sp_offset * wordSize), NULL_WORD);
215 __ restore_bcp();
216 __ restore_locals();
217 // handle exceptions
218 { Label L;
219 const Register thread = rcx;
220 __ get_thread(thread);
221 __ cmpptr(Address(thread, Thread::pending_exception_offset()), (int32_t)NULL_WORD);
222 __ jcc(Assembler::zero, L);
223 __ call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::throw_pending_exception));
224 __ should_not_reach_here();
225 __ bind(L);
226 }
227 __ dispatch_next(state, step);
228 return entry;
229 }
232 int AbstractInterpreter::BasicType_as_index(BasicType type) {
233 int i = 0;
234 switch (type) {
235 case T_BOOLEAN: i = 0; break;
236 case T_CHAR : i = 1; break;
237 case T_BYTE : i = 2; break;
238 case T_SHORT : i = 3; break;
239 case T_INT : // fall through
240 case T_LONG : // fall through
241 case T_VOID : i = 4; break;
242 case T_FLOAT : i = 5; break; // have to treat float and double separately for SSE
243 case T_DOUBLE : i = 6; break;
244 case T_OBJECT : // fall through
245 case T_ARRAY : i = 7; break;
246 default : ShouldNotReachHere();
247 }
248 assert(0 <= i && i < AbstractInterpreter::number_of_result_handlers, "index out of bounds");
249 return i;
250 }
253 address TemplateInterpreterGenerator::generate_result_handler_for(BasicType type) {
254 address entry = __ pc();
255 switch (type) {
256 case T_BOOLEAN: __ c2bool(rax); break;
257 case T_CHAR : __ andptr(rax, 0xFFFF); break;
258 case T_BYTE : __ sign_extend_byte (rax); break;
259 case T_SHORT : __ sign_extend_short(rax); break;
260 case T_INT : /* nothing to do */ break;
261 case T_DOUBLE :
262 case T_FLOAT :
263 { const Register t = InterpreterRuntime::SignatureHandlerGenerator::temp();
264 __ pop(t); // remove return address first
265 __ pop_dtos_to_rsp();
266 // Must return a result for interpreter or compiler. In SSE
267 // mode, results are returned in xmm0 and the FPU stack must
268 // be empty.
269 if (type == T_FLOAT && UseSSE >= 1) {
270 // Load ST0
271 __ fld_d(Address(rsp, 0));
272 // Store as float and empty fpu stack
273 __ fstp_s(Address(rsp, 0));
274 // and reload
275 __ movflt(xmm0, Address(rsp, 0));
276 } else if (type == T_DOUBLE && UseSSE >= 2 ) {
277 __ movdbl(xmm0, Address(rsp, 0));
278 } else {
279 // restore ST0
280 __ fld_d(Address(rsp, 0));
281 }
282 // and pop the temp
283 __ addptr(rsp, 2 * wordSize);
284 __ push(t); // restore return address
285 }
286 break;
287 case T_OBJECT :
288 // retrieve result from frame
289 __ movptr(rax, Address(rbp, frame::interpreter_frame_oop_temp_offset*wordSize));
290 // and verify it
291 __ verify_oop(rax);
292 break;
293 default : ShouldNotReachHere();
294 }
295 __ ret(0); // return from result handler
296 return entry;
297 }
299 address TemplateInterpreterGenerator::generate_safept_entry_for(TosState state, address runtime_entry) {
300 address entry = __ pc();
301 __ push(state);
302 __ call_VM(noreg, runtime_entry);
303 __ dispatch_via(vtos, Interpreter::_normal_table.table_for(vtos));
304 return entry;
305 }
308 // Helpers for commoning out cases in the various type of method entries.
309 //
311 // increment invocation count & check for overflow
312 //
313 // Note: checking for negative value instead of overflow
314 // so we have a 'sticky' overflow test
315 //
316 // rbx,: method
317 // rcx: invocation counter
318 //
319 void InterpreterGenerator::generate_counter_incr(Label* overflow, Label* profile_method, Label* profile_method_continue) {
321 const Address invocation_counter(rbx, methodOopDesc::invocation_counter_offset() + InvocationCounter::counter_offset());
322 const Address backedge_counter (rbx, methodOopDesc::backedge_counter_offset() + InvocationCounter::counter_offset());
324 if (ProfileInterpreter) { // %%% Merge this into methodDataOop
325 __ incrementl(Address(rbx,methodOopDesc::interpreter_invocation_counter_offset()));
326 }
327 // Update standard invocation counters
328 __ movl(rax, backedge_counter); // load backedge counter
330 __ incrementl(rcx, InvocationCounter::count_increment);
331 __ andl(rax, InvocationCounter::count_mask_value); // mask out the status bits
333 __ movl(invocation_counter, rcx); // save invocation count
334 __ addl(rcx, rax); // add both counters
336 // profile_method is non-null only for interpreted method so
337 // profile_method != NULL == !native_call
338 // BytecodeInterpreter only calls for native so code is elided.
340 if (ProfileInterpreter && profile_method != NULL) {
341 // Test to see if we should create a method data oop
342 __ cmp32(rcx,
343 ExternalAddress((address)&InvocationCounter::InterpreterProfileLimit));
344 __ jcc(Assembler::less, *profile_method_continue);
346 // if no method data exists, go to profile_method
347 __ test_method_data_pointer(rax, *profile_method);
348 }
350 __ cmp32(rcx,
351 ExternalAddress((address)&InvocationCounter::InterpreterInvocationLimit));
352 __ jcc(Assembler::aboveEqual, *overflow);
354 }
356 void InterpreterGenerator::generate_counter_overflow(Label* do_continue) {
358 // Asm interpreter on entry
359 // rdi - locals
360 // rsi - bcp
361 // rbx, - method
362 // rdx - cpool
363 // rbp, - interpreter frame
365 // C++ interpreter on entry
366 // rsi - new interpreter state pointer
367 // rbp - interpreter frame pointer
368 // rbx - method
370 // On return (i.e. jump to entry_point) [ back to invocation of interpreter ]
371 // rbx, - method
372 // rcx - rcvr (assuming there is one)
373 // top of stack return address of interpreter caller
374 // rsp - sender_sp
376 // C++ interpreter only
377 // rsi - previous interpreter state pointer
379 const Address size_of_parameters(rbx, methodOopDesc::size_of_parameters_offset());
381 // InterpreterRuntime::frequency_counter_overflow takes one argument
382 // indicating if the counter overflow occurs at a backwards branch (non-NULL bcp).
383 // The call returns the address of the verified entry point for the method or NULL
384 // if the compilation did not complete (either went background or bailed out).
385 __ movptr(rax, (intptr_t)false);
386 __ call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::frequency_counter_overflow), rax);
388 __ movptr(rbx, Address(rbp, method_offset)); // restore methodOop
390 // Preserve invariant that rsi/rdi contain bcp/locals of sender frame
391 // and jump to the interpreted entry.
392 __ jmp(*do_continue, relocInfo::none);
394 }
396 void InterpreterGenerator::generate_stack_overflow_check(void) {
397 // see if we've got enough room on the stack for locals plus overhead.
398 // the expression stack grows down incrementally, so the normal guard
399 // page mechanism will work for that.
400 //
401 // Registers live on entry:
402 //
403 // Asm interpreter
404 // rdx: number of additional locals this frame needs (what we must check)
405 // rbx,: methodOop
407 // destroyed on exit
408 // rax,
410 // NOTE: since the additional locals are also always pushed (wasn't obvious in
411 // generate_method_entry) so the guard should work for them too.
412 //
414 // monitor entry size: see picture of stack set (generate_method_entry) and frame_x86.hpp
415 const int entry_size = frame::interpreter_frame_monitor_size() * wordSize;
417 // total overhead size: entry_size + (saved rbp, thru expr stack bottom).
418 // be sure to change this if you add/subtract anything to/from the overhead area
419 const int overhead_size = -(frame::interpreter_frame_initial_sp_offset*wordSize) + entry_size;
421 const int page_size = os::vm_page_size();
423 Label after_frame_check;
425 // see if the frame is greater than one page in size. If so,
426 // then we need to verify there is enough stack space remaining
427 // for the additional locals.
428 __ cmpl(rdx, (page_size - overhead_size)/Interpreter::stackElementSize());
429 __ jcc(Assembler::belowEqual, after_frame_check);
431 // compute rsp as if this were going to be the last frame on
432 // the stack before the red zone
434 Label after_frame_check_pop;
436 __ push(rsi);
438 const Register thread = rsi;
440 __ get_thread(thread);
442 const Address stack_base(thread, Thread::stack_base_offset());
443 const Address stack_size(thread, Thread::stack_size_offset());
445 // locals + overhead, in bytes
446 __ lea(rax, Address(noreg, rdx, Interpreter::stackElementScale(), overhead_size));
448 #ifdef ASSERT
449 Label stack_base_okay, stack_size_okay;
450 // verify that thread stack base is non-zero
451 __ cmpptr(stack_base, (int32_t)NULL_WORD);
452 __ jcc(Assembler::notEqual, stack_base_okay);
453 __ stop("stack base is zero");
454 __ bind(stack_base_okay);
455 // verify that thread stack size is non-zero
456 __ cmpptr(stack_size, 0);
457 __ jcc(Assembler::notEqual, stack_size_okay);
458 __ stop("stack size is zero");
459 __ bind(stack_size_okay);
460 #endif
462 // Add stack base to locals and subtract stack size
463 __ addptr(rax, stack_base);
464 __ subptr(rax, stack_size);
466 // Use the maximum number of pages we might bang.
467 const int max_pages = StackShadowPages > (StackRedPages+StackYellowPages) ? StackShadowPages :
468 (StackRedPages+StackYellowPages);
469 __ addptr(rax, max_pages * page_size);
471 // check against the current stack bottom
472 __ cmpptr(rsp, rax);
473 __ jcc(Assembler::above, after_frame_check_pop);
475 __ pop(rsi); // get saved bcp / (c++ prev state ).
477 __ pop(rax); // get return address
478 __ jump(ExternalAddress(Interpreter::throw_StackOverflowError_entry()));
480 // all done with frame size check
481 __ bind(after_frame_check_pop);
482 __ pop(rsi);
484 __ bind(after_frame_check);
485 }
487 // Allocate monitor and lock method (asm interpreter)
488 // rbx, - methodOop
489 //
490 void InterpreterGenerator::lock_method(void) {
491 // synchronize method
492 const Address access_flags (rbx, methodOopDesc::access_flags_offset());
493 const Address monitor_block_top (rbp, frame::interpreter_frame_monitor_block_top_offset * wordSize);
494 const int entry_size = frame::interpreter_frame_monitor_size() * wordSize;
496 #ifdef ASSERT
497 { Label L;
498 __ movl(rax, access_flags);
499 __ testl(rax, JVM_ACC_SYNCHRONIZED);
500 __ jcc(Assembler::notZero, L);
501 __ stop("method doesn't need synchronization");
502 __ bind(L);
503 }
504 #endif // ASSERT
505 // get synchronization object
506 { Label done;
507 const int mirror_offset = klassOopDesc::klass_part_offset_in_bytes() + Klass::java_mirror_offset_in_bytes();
508 __ movl(rax, access_flags);
509 __ testl(rax, JVM_ACC_STATIC);
510 __ movptr(rax, Address(rdi, Interpreter::local_offset_in_bytes(0))); // get receiver (assume this is frequent case)
511 __ jcc(Assembler::zero, done);
512 __ movptr(rax, Address(rbx, methodOopDesc::constants_offset()));
513 __ movptr(rax, Address(rax, constantPoolOopDesc::pool_holder_offset_in_bytes()));
514 __ movptr(rax, Address(rax, mirror_offset));
515 __ bind(done);
516 }
517 // add space for monitor & lock
518 __ subptr(rsp, entry_size); // add space for a monitor entry
519 __ movptr(monitor_block_top, rsp); // set new monitor block top
520 __ movptr(Address(rsp, BasicObjectLock::obj_offset_in_bytes()), rax); // store object
521 __ mov(rdx, rsp); // object address
522 __ lock_object(rdx);
523 }
525 //
526 // Generate a fixed interpreter frame. This is identical setup for interpreted methods
527 // and for native methods hence the shared code.
529 void TemplateInterpreterGenerator::generate_fixed_frame(bool native_call) {
530 // initialize fixed part of activation frame
531 __ push(rax); // save return address
532 __ enter(); // save old & set new rbp,
535 __ push(rsi); // set sender sp
536 __ push((int32_t)NULL_WORD); // leave last_sp as null
537 __ movptr(rsi, Address(rbx,methodOopDesc::const_offset())); // get constMethodOop
538 __ lea(rsi, Address(rsi,constMethodOopDesc::codes_offset())); // get codebase
539 __ push(rbx); // save methodOop
540 if (ProfileInterpreter) {
541 Label method_data_continue;
542 __ movptr(rdx, Address(rbx, in_bytes(methodOopDesc::method_data_offset())));
543 __ testptr(rdx, rdx);
544 __ jcc(Assembler::zero, method_data_continue);
545 __ addptr(rdx, in_bytes(methodDataOopDesc::data_offset()));
546 __ bind(method_data_continue);
547 __ push(rdx); // set the mdp (method data pointer)
548 } else {
549 __ push(0);
550 }
552 __ movptr(rdx, Address(rbx, methodOopDesc::constants_offset()));
553 __ movptr(rdx, Address(rdx, constantPoolOopDesc::cache_offset_in_bytes()));
554 __ push(rdx); // set constant pool cache
555 __ push(rdi); // set locals pointer
556 if (native_call) {
557 __ push(0); // no bcp
558 } else {
559 __ push(rsi); // set bcp
560 }
561 __ push(0); // reserve word for pointer to expression stack bottom
562 __ movptr(Address(rsp, 0), rsp); // set expression stack bottom
563 }
565 // End of helpers
567 //
568 // Various method entries
569 //------------------------------------------------------------------------------------------------------------------------
570 //
571 //
573 // Call an accessor method (assuming it is resolved, otherwise drop into vanilla (slow path) entry
575 address InterpreterGenerator::generate_accessor_entry(void) {
577 // rbx,: methodOop
578 // rcx: receiver (preserve for slow entry into asm interpreter)
580 // rsi: senderSP must preserved for slow path, set SP to it on fast path
582 address entry_point = __ pc();
583 Label xreturn_path;
585 // do fastpath for resolved accessor methods
586 if (UseFastAccessorMethods) {
587 Label slow_path;
588 // If we need a safepoint check, generate full interpreter entry.
589 ExternalAddress state(SafepointSynchronize::address_of_state());
590 __ cmp32(ExternalAddress(SafepointSynchronize::address_of_state()),
591 SafepointSynchronize::_not_synchronized);
593 __ jcc(Assembler::notEqual, slow_path);
594 // ASM/C++ Interpreter
595 // Code: _aload_0, _(i|a)getfield, _(i|a)return or any rewrites thereof; parameter size = 1
596 // Note: We can only use this code if the getfield has been resolved
597 // and if we don't have a null-pointer exception => check for
598 // these conditions first and use slow path if necessary.
599 // rbx,: method
600 // rcx: receiver
601 __ movptr(rax, Address(rsp, wordSize));
603 // check if local 0 != NULL and read field
604 __ testptr(rax, rax);
605 __ jcc(Assembler::zero, slow_path);
607 __ movptr(rdi, Address(rbx, methodOopDesc::constants_offset()));
608 // read first instruction word and extract bytecode @ 1 and index @ 2
609 __ movptr(rdx, Address(rbx, methodOopDesc::const_offset()));
610 __ movl(rdx, Address(rdx, constMethodOopDesc::codes_offset()));
611 // Shift codes right to get the index on the right.
612 // The bytecode fetched looks like <index><0xb4><0x2a>
613 __ shrl(rdx, 2*BitsPerByte);
614 __ shll(rdx, exact_log2(in_words(ConstantPoolCacheEntry::size())));
615 __ movptr(rdi, Address(rdi, constantPoolOopDesc::cache_offset_in_bytes()));
617 // rax,: local 0
618 // rbx,: method
619 // rcx: receiver - do not destroy since it is needed for slow path!
620 // rcx: scratch
621 // rdx: constant pool cache index
622 // rdi: constant pool cache
623 // rsi: sender sp
625 // check if getfield has been resolved and read constant pool cache entry
626 // check the validity of the cache entry by testing whether _indices field
627 // contains Bytecode::_getfield in b1 byte.
628 assert(in_words(ConstantPoolCacheEntry::size()) == 4, "adjust shift below");
629 __ movl(rcx,
630 Address(rdi,
631 rdx,
632 Address::times_ptr, constantPoolCacheOopDesc::base_offset() + ConstantPoolCacheEntry::indices_offset()));
633 __ shrl(rcx, 2*BitsPerByte);
634 __ andl(rcx, 0xFF);
635 __ cmpl(rcx, Bytecodes::_getfield);
636 __ jcc(Assembler::notEqual, slow_path);
638 // Note: constant pool entry is not valid before bytecode is resolved
639 __ movptr(rcx,
640 Address(rdi,
641 rdx,
642 Address::times_ptr, constantPoolCacheOopDesc::base_offset() + ConstantPoolCacheEntry::f2_offset()));
643 __ movl(rdx,
644 Address(rdi,
645 rdx,
646 Address::times_ptr, constantPoolCacheOopDesc::base_offset() + ConstantPoolCacheEntry::flags_offset()));
648 Label notByte, notShort, notChar;
649 const Address field_address (rax, rcx, Address::times_1);
651 // Need to differentiate between igetfield, agetfield, bgetfield etc.
652 // because they are different sizes.
653 // Use the type from the constant pool cache
654 __ shrl(rdx, ConstantPoolCacheEntry::tosBits);
655 // Make sure we don't need to mask rdx for tosBits after the above shift
656 ConstantPoolCacheEntry::verify_tosBits();
657 __ cmpl(rdx, btos);
658 __ jcc(Assembler::notEqual, notByte);
659 __ load_signed_byte(rax, field_address);
660 __ jmp(xreturn_path);
662 __ bind(notByte);
663 __ cmpl(rdx, stos);
664 __ jcc(Assembler::notEqual, notShort);
665 __ load_signed_word(rax, field_address);
666 __ jmp(xreturn_path);
668 __ bind(notShort);
669 __ cmpl(rdx, ctos);
670 __ jcc(Assembler::notEqual, notChar);
671 __ load_unsigned_word(rax, field_address);
672 __ jmp(xreturn_path);
674 __ bind(notChar);
675 #ifdef ASSERT
676 Label okay;
677 __ cmpl(rdx, atos);
678 __ jcc(Assembler::equal, okay);
679 __ cmpl(rdx, itos);
680 __ jcc(Assembler::equal, okay);
681 __ stop("what type is this?");
682 __ bind(okay);
683 #endif // ASSERT
684 // All the rest are a 32 bit wordsize
685 // This is ok for now. Since fast accessors should be going away
686 __ movptr(rax, field_address);
688 __ bind(xreturn_path);
690 // _ireturn/_areturn
691 __ pop(rdi); // get return address
692 __ mov(rsp, rsi); // set sp to sender sp
693 __ jmp(rdi);
695 // generate a vanilla interpreter entry as the slow path
696 __ bind(slow_path);
698 (void) generate_normal_entry(false);
699 return entry_point;
700 }
701 return NULL;
703 }
705 //
706 // Interpreter stub for calling a native method. (asm interpreter)
707 // This sets up a somewhat different looking stack for calling the native method
708 // than the typical interpreter frame setup.
709 //
711 address InterpreterGenerator::generate_native_entry(bool synchronized) {
712 // determine code generation flags
713 bool inc_counter = UseCompiler || CountCompiledCalls;
715 // rbx,: methodOop
716 // rsi: sender sp
717 // rsi: previous interpreter state (C++ interpreter) must preserve
718 address entry_point = __ pc();
721 const Address size_of_parameters(rbx, methodOopDesc::size_of_parameters_offset());
722 const Address invocation_counter(rbx, methodOopDesc::invocation_counter_offset() + InvocationCounter::counter_offset());
723 const Address access_flags (rbx, methodOopDesc::access_flags_offset());
725 // get parameter size (always needed)
726 __ load_unsigned_word(rcx, size_of_parameters);
728 // native calls don't need the stack size check since they have no expression stack
729 // and the arguments are already on the stack and we only add a handful of words
730 // to the stack
732 // rbx,: methodOop
733 // rcx: size of parameters
734 // rsi: sender sp
736 __ pop(rax); // get return address
737 // for natives the size of locals is zero
739 // compute beginning of parameters (rdi)
740 __ lea(rdi, Address(rsp, rcx, Interpreter::stackElementScale(), -wordSize));
743 // add 2 zero-initialized slots for native calls
744 // NULL result handler
745 __ push((int32_t)NULL_WORD);
746 // NULL oop temp (mirror or jni oop result)
747 __ push((int32_t)NULL_WORD);
749 if (inc_counter) __ movl(rcx, invocation_counter); // (pre-)fetch invocation count
750 // initialize fixed part of activation frame
752 generate_fixed_frame(true);
754 // make sure method is native & not abstract
755 #ifdef ASSERT
756 __ movl(rax, access_flags);
757 {
758 Label L;
759 __ testl(rax, JVM_ACC_NATIVE);
760 __ jcc(Assembler::notZero, L);
761 __ stop("tried to execute non-native method as native");
762 __ bind(L);
763 }
764 { Label L;
765 __ testl(rax, JVM_ACC_ABSTRACT);
766 __ jcc(Assembler::zero, L);
767 __ stop("tried to execute abstract method in interpreter");
768 __ bind(L);
769 }
770 #endif
772 // Since at this point in the method invocation the exception handler
773 // would try to exit the monitor of synchronized methods which hasn't
774 // been entered yet, we set the thread local variable
775 // _do_not_unlock_if_synchronized to true. The remove_activation will
776 // check this flag.
778 __ get_thread(rax);
779 const Address do_not_unlock_if_synchronized(rax,
780 in_bytes(JavaThread::do_not_unlock_if_synchronized_offset()));
781 __ movbool(do_not_unlock_if_synchronized, true);
783 // increment invocation count & check for overflow
784 Label invocation_counter_overflow;
785 if (inc_counter) {
786 generate_counter_incr(&invocation_counter_overflow, NULL, NULL);
787 }
789 Label continue_after_compile;
790 __ bind(continue_after_compile);
792 bang_stack_shadow_pages(true);
794 // reset the _do_not_unlock_if_synchronized flag
795 __ get_thread(rax);
796 __ movbool(do_not_unlock_if_synchronized, false);
798 // check for synchronized methods
799 // Must happen AFTER invocation_counter check and stack overflow check,
800 // so method is not locked if overflows.
801 //
802 if (synchronized) {
803 lock_method();
804 } else {
805 // no synchronization necessary
806 #ifdef ASSERT
807 { Label L;
808 __ movl(rax, access_flags);
809 __ testl(rax, JVM_ACC_SYNCHRONIZED);
810 __ jcc(Assembler::zero, L);
811 __ stop("method needs synchronization");
812 __ bind(L);
813 }
814 #endif
815 }
817 // start execution
818 #ifdef ASSERT
819 { Label L;
820 const Address monitor_block_top (rbp,
821 frame::interpreter_frame_monitor_block_top_offset * wordSize);
822 __ movptr(rax, monitor_block_top);
823 __ cmpptr(rax, rsp);
824 __ jcc(Assembler::equal, L);
825 __ stop("broken stack frame setup in interpreter");
826 __ bind(L);
827 }
828 #endif
830 // jvmti/dtrace support
831 __ notify_method_entry();
833 // work registers
834 const Register method = rbx;
835 const Register thread = rdi;
836 const Register t = rcx;
838 // allocate space for parameters
839 __ get_method(method);
840 __ verify_oop(method);
841 __ load_unsigned_word(t, Address(method, methodOopDesc::size_of_parameters_offset()));
842 __ shlptr(t, Interpreter::logStackElementSize());
843 __ addptr(t, 2*wordSize); // allocate two more slots for JNIEnv and possible mirror
844 __ subptr(rsp, t);
845 __ andptr(rsp, -(StackAlignmentInBytes)); // gcc needs 16 byte aligned stacks to do XMM intrinsics
847 // get signature handler
848 { Label L;
849 __ movptr(t, Address(method, methodOopDesc::signature_handler_offset()));
850 __ testptr(t, t);
851 __ jcc(Assembler::notZero, L);
852 __ call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::prepare_native_call), method);
853 __ get_method(method);
854 __ movptr(t, Address(method, methodOopDesc::signature_handler_offset()));
855 __ bind(L);
856 }
858 // call signature handler
859 assert(InterpreterRuntime::SignatureHandlerGenerator::from() == rdi, "adjust this code");
860 assert(InterpreterRuntime::SignatureHandlerGenerator::to () == rsp, "adjust this code");
861 assert(InterpreterRuntime::SignatureHandlerGenerator::temp() == t , "adjust this code");
862 // The generated handlers do not touch RBX (the method oop).
863 // However, large signatures cannot be cached and are generated
864 // each time here. The slow-path generator will blow RBX
865 // sometime, so we must reload it after the call.
866 __ call(t);
867 __ get_method(method); // slow path call blows RBX on DevStudio 5.0
869 // result handler is in rax,
870 // set result handler
871 __ movptr(Address(rbp, frame::interpreter_frame_result_handler_offset*wordSize), rax);
873 // pass mirror handle if static call
874 { Label L;
875 const int mirror_offset = klassOopDesc::klass_part_offset_in_bytes() + Klass::java_mirror_offset_in_bytes();
876 __ movl(t, Address(method, methodOopDesc::access_flags_offset()));
877 __ testl(t, JVM_ACC_STATIC);
878 __ jcc(Assembler::zero, L);
879 // get mirror
880 __ movptr(t, Address(method, methodOopDesc:: constants_offset()));
881 __ movptr(t, Address(t, constantPoolOopDesc::pool_holder_offset_in_bytes()));
882 __ movptr(t, Address(t, mirror_offset));
883 // copy mirror into activation frame
884 __ movptr(Address(rbp, frame::interpreter_frame_oop_temp_offset * wordSize), t);
885 // pass handle to mirror
886 __ lea(t, Address(rbp, frame::interpreter_frame_oop_temp_offset * wordSize));
887 __ movptr(Address(rsp, wordSize), t);
888 __ bind(L);
889 }
891 // get native function entry point
892 { Label L;
893 __ movptr(rax, Address(method, methodOopDesc::native_function_offset()));
894 ExternalAddress unsatisfied(SharedRuntime::native_method_throw_unsatisfied_link_error_entry());
895 __ cmpptr(rax, unsatisfied.addr());
896 __ jcc(Assembler::notEqual, L);
897 __ call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::prepare_native_call), method);
898 __ get_method(method);
899 __ verify_oop(method);
900 __ movptr(rax, Address(method, methodOopDesc::native_function_offset()));
901 __ bind(L);
902 }
904 // pass JNIEnv
905 __ get_thread(thread);
906 __ lea(t, Address(thread, JavaThread::jni_environment_offset()));
907 __ movptr(Address(rsp, 0), t);
909 // set_last_Java_frame_before_call
910 // It is enough that the pc()
911 // points into the right code segment. It does not have to be the correct return pc.
912 __ set_last_Java_frame(thread, noreg, rbp, __ pc());
914 // change thread state
915 #ifdef ASSERT
916 { Label L;
917 __ movl(t, Address(thread, JavaThread::thread_state_offset()));
918 __ cmpl(t, _thread_in_Java);
919 __ jcc(Assembler::equal, L);
920 __ stop("Wrong thread state in native stub");
921 __ bind(L);
922 }
923 #endif
925 // Change state to native
926 __ movl(Address(thread, JavaThread::thread_state_offset()), _thread_in_native);
927 __ call(rax);
929 // result potentially in rdx:rax or ST0
931 // Either restore the MXCSR register after returning from the JNI Call
932 // or verify that it wasn't changed.
933 if (VM_Version::supports_sse()) {
934 if (RestoreMXCSROnJNICalls) {
935 __ ldmxcsr(ExternalAddress(StubRoutines::addr_mxcsr_std()));
936 }
937 else if (CheckJNICalls ) {
938 __ call(RuntimeAddress(StubRoutines::x86::verify_mxcsr_entry()));
939 }
940 }
942 // Either restore the x87 floating pointer control word after returning
943 // from the JNI call or verify that it wasn't changed.
944 if (CheckJNICalls) {
945 __ call(RuntimeAddress(StubRoutines::x86::verify_fpu_cntrl_wrd_entry()));
946 }
948 // save potential result in ST(0) & rdx:rax
949 // (if result handler is the T_FLOAT or T_DOUBLE handler, result must be in ST0 -
950 // the check is necessary to avoid potential Intel FPU overflow problems by saving/restoring 'empty' FPU registers)
951 // It is safe to do this push because state is _thread_in_native and return address will be found
952 // via _last_native_pc and not via _last_jave_sp
954 // NOTE: the order of theses push(es) is known to frame::interpreter_frame_result.
955 // If the order changes or anything else is added to the stack the code in
956 // interpreter_frame_result will have to be changed.
958 { Label L;
959 Label push_double;
960 ExternalAddress float_handler(AbstractInterpreter::result_handler(T_FLOAT));
961 ExternalAddress double_handler(AbstractInterpreter::result_handler(T_DOUBLE));
962 __ cmpptr(Address(rbp, (frame::interpreter_frame_oop_temp_offset + 1)*wordSize),
963 float_handler.addr());
964 __ jcc(Assembler::equal, push_double);
965 __ cmpptr(Address(rbp, (frame::interpreter_frame_oop_temp_offset + 1)*wordSize),
966 double_handler.addr());
967 __ jcc(Assembler::notEqual, L);
968 __ bind(push_double);
969 __ push(dtos);
970 __ bind(L);
971 }
972 __ push(ltos);
974 // change thread state
975 __ get_thread(thread);
976 __ movl(Address(thread, JavaThread::thread_state_offset()), _thread_in_native_trans);
977 if(os::is_MP()) {
978 if (UseMembar) {
979 // Force this write out before the read below
980 __ membar(Assembler::Membar_mask_bits(
981 Assembler::LoadLoad | Assembler::LoadStore |
982 Assembler::StoreLoad | Assembler::StoreStore));
983 } else {
984 // Write serialization page so VM thread can do a pseudo remote membar.
985 // We use the current thread pointer to calculate a thread specific
986 // offset to write to within the page. This minimizes bus traffic
987 // due to cache line collision.
988 __ serialize_memory(thread, rcx);
989 }
990 }
992 if (AlwaysRestoreFPU) {
993 // Make sure the control word is correct.
994 __ fldcw(ExternalAddress(StubRoutines::addr_fpu_cntrl_wrd_std()));
995 }
997 // check for safepoint operation in progress and/or pending suspend requests
998 { Label Continue;
1000 __ cmp32(ExternalAddress(SafepointSynchronize::address_of_state()),
1001 SafepointSynchronize::_not_synchronized);
1003 Label L;
1004 __ jcc(Assembler::notEqual, L);
1005 __ cmpl(Address(thread, JavaThread::suspend_flags_offset()), 0);
1006 __ jcc(Assembler::equal, Continue);
1007 __ bind(L);
1009 // Don't use call_VM as it will see a possible pending exception and forward it
1010 // and never return here preventing us from clearing _last_native_pc down below.
1011 // Also can't use call_VM_leaf either as it will check to see if rsi & rdi are
1012 // preserved and correspond to the bcp/locals pointers. So we do a runtime call
1013 // by hand.
1014 //
1015 __ push(thread);
1016 __ call(RuntimeAddress(CAST_FROM_FN_PTR(address,
1017 JavaThread::check_special_condition_for_native_trans)));
1018 __ increment(rsp, wordSize);
1019 __ get_thread(thread);
1021 __ bind(Continue);
1022 }
1024 // change thread state
1025 __ movl(Address(thread, JavaThread::thread_state_offset()), _thread_in_Java);
1027 __ reset_last_Java_frame(thread, true, true);
1029 // reset handle block
1030 __ movptr(t, Address(thread, JavaThread::active_handles_offset()));
1031 __ movptr(Address(t, JNIHandleBlock::top_offset_in_bytes()), NULL_WORD);
1033 // If result was an oop then unbox and save it in the frame
1034 { Label L;
1035 Label no_oop, store_result;
1036 ExternalAddress handler(AbstractInterpreter::result_handler(T_OBJECT));
1037 __ cmpptr(Address(rbp, frame::interpreter_frame_result_handler_offset*wordSize),
1038 handler.addr());
1039 __ jcc(Assembler::notEqual, no_oop);
1040 __ cmpptr(Address(rsp, 0), (int32_t)NULL_WORD);
1041 __ pop(ltos);
1042 __ testptr(rax, rax);
1043 __ jcc(Assembler::zero, store_result);
1044 // unbox
1045 __ movptr(rax, Address(rax, 0));
1046 __ bind(store_result);
1047 __ movptr(Address(rbp, (frame::interpreter_frame_oop_temp_offset)*wordSize), rax);
1048 // keep stack depth as expected by pushing oop which will eventually be discarded
1049 __ push(ltos);
1050 __ bind(no_oop);
1051 }
1053 {
1054 Label no_reguard;
1055 __ cmpl(Address(thread, JavaThread::stack_guard_state_offset()), JavaThread::stack_guard_yellow_disabled);
1056 __ jcc(Assembler::notEqual, no_reguard);
1058 __ pusha();
1059 __ call(RuntimeAddress(CAST_FROM_FN_PTR(address, SharedRuntime::reguard_yellow_pages)));
1060 __ popa();
1062 __ bind(no_reguard);
1063 }
1065 // restore rsi to have legal interpreter frame,
1066 // i.e., bci == 0 <=> rsi == code_base()
1067 // Can't call_VM until bcp is within reasonable.
1068 __ get_method(method); // method is junk from thread_in_native to now.
1069 __ verify_oop(method);
1070 __ movptr(rsi, Address(method,methodOopDesc::const_offset())); // get constMethodOop
1071 __ lea(rsi, Address(rsi,constMethodOopDesc::codes_offset())); // get codebase
1073 // handle exceptions (exception handling will handle unlocking!)
1074 { Label L;
1075 __ cmpptr(Address(thread, Thread::pending_exception_offset()), (int32_t)NULL_WORD);
1076 __ jcc(Assembler::zero, L);
1077 // Note: At some point we may want to unify this with the code used in call_VM_base();
1078 // i.e., we should use the StubRoutines::forward_exception code. For now this
1079 // doesn't work here because the rsp is not correctly set at this point.
1080 __ MacroAssembler::call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::throw_pending_exception));
1081 __ should_not_reach_here();
1082 __ bind(L);
1083 }
1085 // do unlocking if necessary
1086 { Label L;
1087 __ movl(t, Address(method, methodOopDesc::access_flags_offset()));
1088 __ testl(t, JVM_ACC_SYNCHRONIZED);
1089 __ jcc(Assembler::zero, L);
1090 // the code below should be shared with interpreter macro assembler implementation
1091 { Label unlock;
1092 // BasicObjectLock will be first in list, since this is a synchronized method. However, need
1093 // to check that the object has not been unlocked by an explicit monitorexit bytecode.
1094 const Address monitor(rbp, frame::interpreter_frame_initial_sp_offset * wordSize - (int)sizeof(BasicObjectLock));
1096 __ lea(rdx, monitor); // address of first monitor
1098 __ movptr(t, Address(rdx, BasicObjectLock::obj_offset_in_bytes()));
1099 __ testptr(t, t);
1100 __ jcc(Assembler::notZero, unlock);
1102 // Entry already unlocked, need to throw exception
1103 __ MacroAssembler::call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::throw_illegal_monitor_state_exception));
1104 __ should_not_reach_here();
1106 __ bind(unlock);
1107 __ unlock_object(rdx);
1108 }
1109 __ bind(L);
1110 }
1112 // jvmti/dtrace support
1113 // Note: This must happen _after_ handling/throwing any exceptions since
1114 // the exception handler code notifies the runtime of method exits
1115 // too. If this happens before, method entry/exit notifications are
1116 // not properly paired (was bug - gri 11/22/99).
1117 __ notify_method_exit(vtos, InterpreterMacroAssembler::NotifyJVMTI);
1119 // restore potential result in rdx:rax, call result handler to restore potential result in ST0 & handle result
1120 __ pop(ltos);
1121 __ movptr(t, Address(rbp, frame::interpreter_frame_result_handler_offset*wordSize));
1122 __ call(t);
1124 // remove activation
1125 __ movptr(t, Address(rbp, frame::interpreter_frame_sender_sp_offset * wordSize)); // get sender sp
1126 __ leave(); // remove frame anchor
1127 __ pop(rdi); // get return address
1128 __ mov(rsp, t); // set sp to sender sp
1129 __ jmp(rdi);
1131 if (inc_counter) {
1132 // Handle overflow of counter and compile method
1133 __ bind(invocation_counter_overflow);
1134 generate_counter_overflow(&continue_after_compile);
1135 }
1137 return entry_point;
1138 }
1140 //
1141 // Generic interpreted method entry to (asm) interpreter
1142 //
1143 address InterpreterGenerator::generate_normal_entry(bool synchronized) {
1144 // determine code generation flags
1145 bool inc_counter = UseCompiler || CountCompiledCalls;
1147 // rbx,: methodOop
1148 // rsi: sender sp
1149 address entry_point = __ pc();
1152 const Address size_of_parameters(rbx, methodOopDesc::size_of_parameters_offset());
1153 const Address size_of_locals (rbx, methodOopDesc::size_of_locals_offset());
1154 const Address invocation_counter(rbx, methodOopDesc::invocation_counter_offset() + InvocationCounter::counter_offset());
1155 const Address access_flags (rbx, methodOopDesc::access_flags_offset());
1157 // get parameter size (always needed)
1158 __ load_unsigned_word(rcx, size_of_parameters);
1160 // rbx,: methodOop
1161 // rcx: size of parameters
1163 // rsi: sender_sp (could differ from sp+wordSize if we were called via c2i )
1165 __ load_unsigned_word(rdx, size_of_locals); // get size of locals in words
1166 __ subl(rdx, rcx); // rdx = no. of additional locals
1168 // see if we've got enough room on the stack for locals plus overhead.
1169 generate_stack_overflow_check();
1171 // get return address
1172 __ pop(rax);
1174 // compute beginning of parameters (rdi)
1175 __ lea(rdi, Address(rsp, rcx, Interpreter::stackElementScale(), -wordSize));
1177 // rdx - # of additional locals
1178 // allocate space for locals
1179 // explicitly initialize locals
1180 {
1181 Label exit, loop;
1182 __ testl(rdx, rdx);
1183 __ jcc(Assembler::lessEqual, exit); // do nothing if rdx <= 0
1184 __ bind(loop);
1185 if (TaggedStackInterpreter) {
1186 __ push((int32_t)NULL_WORD); // push tag
1187 }
1188 __ push((int32_t)NULL_WORD); // initialize local variables
1189 __ decrement(rdx); // until everything initialized
1190 __ jcc(Assembler::greater, loop);
1191 __ bind(exit);
1192 }
1194 if (inc_counter) __ movl(rcx, invocation_counter); // (pre-)fetch invocation count
1195 // initialize fixed part of activation frame
1196 generate_fixed_frame(false);
1198 // make sure method is not native & not abstract
1199 #ifdef ASSERT
1200 __ movl(rax, access_flags);
1201 {
1202 Label L;
1203 __ testl(rax, JVM_ACC_NATIVE);
1204 __ jcc(Assembler::zero, L);
1205 __ stop("tried to execute native method as non-native");
1206 __ bind(L);
1207 }
1208 { Label L;
1209 __ testl(rax, JVM_ACC_ABSTRACT);
1210 __ jcc(Assembler::zero, L);
1211 __ stop("tried to execute abstract method in interpreter");
1212 __ bind(L);
1213 }
1214 #endif
1216 // Since at this point in the method invocation the exception handler
1217 // would try to exit the monitor of synchronized methods which hasn't
1218 // been entered yet, we set the thread local variable
1219 // _do_not_unlock_if_synchronized to true. The remove_activation will
1220 // check this flag.
1222 __ get_thread(rax);
1223 const Address do_not_unlock_if_synchronized(rax,
1224 in_bytes(JavaThread::do_not_unlock_if_synchronized_offset()));
1225 __ movbool(do_not_unlock_if_synchronized, true);
1227 // increment invocation count & check for overflow
1228 Label invocation_counter_overflow;
1229 Label profile_method;
1230 Label profile_method_continue;
1231 if (inc_counter) {
1232 generate_counter_incr(&invocation_counter_overflow, &profile_method, &profile_method_continue);
1233 if (ProfileInterpreter) {
1234 __ bind(profile_method_continue);
1235 }
1236 }
1237 Label continue_after_compile;
1238 __ bind(continue_after_compile);
1240 bang_stack_shadow_pages(false);
1242 // reset the _do_not_unlock_if_synchronized flag
1243 __ get_thread(rax);
1244 __ movbool(do_not_unlock_if_synchronized, false);
1246 // check for synchronized methods
1247 // Must happen AFTER invocation_counter check and stack overflow check,
1248 // so method is not locked if overflows.
1249 //
1250 if (synchronized) {
1251 // Allocate monitor and lock method
1252 lock_method();
1253 } else {
1254 // no synchronization necessary
1255 #ifdef ASSERT
1256 { Label L;
1257 __ movl(rax, access_flags);
1258 __ testl(rax, JVM_ACC_SYNCHRONIZED);
1259 __ jcc(Assembler::zero, L);
1260 __ stop("method needs synchronization");
1261 __ bind(L);
1262 }
1263 #endif
1264 }
1266 // start execution
1267 #ifdef ASSERT
1268 { Label L;
1269 const Address monitor_block_top (rbp,
1270 frame::interpreter_frame_monitor_block_top_offset * wordSize);
1271 __ movptr(rax, monitor_block_top);
1272 __ cmpptr(rax, rsp);
1273 __ jcc(Assembler::equal, L);
1274 __ stop("broken stack frame setup in interpreter");
1275 __ bind(L);
1276 }
1277 #endif
1279 // jvmti support
1280 __ notify_method_entry();
1282 __ dispatch_next(vtos);
1284 // invocation counter overflow
1285 if (inc_counter) {
1286 if (ProfileInterpreter) {
1287 // We have decided to profile this method in the interpreter
1288 __ bind(profile_method);
1290 __ call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::profile_method), rsi, true);
1292 __ movptr(rbx, Address(rbp, method_offset)); // restore methodOop
1293 __ movptr(rax, Address(rbx, in_bytes(methodOopDesc::method_data_offset())));
1294 __ movptr(Address(rbp, frame::interpreter_frame_mdx_offset * wordSize), rax);
1295 __ test_method_data_pointer(rax, profile_method_continue);
1296 __ addptr(rax, in_bytes(methodDataOopDesc::data_offset()));
1297 __ movptr(Address(rbp, frame::interpreter_frame_mdx_offset * wordSize), rax);
1298 __ jmp(profile_method_continue);
1299 }
1300 // Handle overflow of counter and compile method
1301 __ bind(invocation_counter_overflow);
1302 generate_counter_overflow(&continue_after_compile);
1303 }
1305 return entry_point;
1306 }
1308 //------------------------------------------------------------------------------------------------------------------------
1309 // Entry points
1310 //
1311 // Here we generate the various kind of entries into the interpreter.
1312 // The two main entry type are generic bytecode methods and native call method.
1313 // These both come in synchronized and non-synchronized versions but the
1314 // frame layout they create is very similar. The other method entry
1315 // types are really just special purpose entries that are really entry
1316 // and interpretation all in one. These are for trivial methods like
1317 // accessor, empty, or special math methods.
1318 //
1319 // When control flow reaches any of the entry types for the interpreter
1320 // the following holds ->
1321 //
1322 // Arguments:
1323 //
1324 // rbx,: methodOop
1325 // rcx: receiver
1326 //
1327 //
1328 // Stack layout immediately at entry
1329 //
1330 // [ return address ] <--- rsp
1331 // [ parameter n ]
1332 // ...
1333 // [ parameter 1 ]
1334 // [ expression stack ] (caller's java expression stack)
1336 // Assuming that we don't go to one of the trivial specialized
1337 // entries the stack will look like below when we are ready to execute
1338 // the first bytecode (or call the native routine). The register usage
1339 // will be as the template based interpreter expects (see interpreter_x86.hpp).
1340 //
1341 // local variables follow incoming parameters immediately; i.e.
1342 // the return address is moved to the end of the locals).
1343 //
1344 // [ monitor entry ] <--- rsp
1345 // ...
1346 // [ monitor entry ]
1347 // [ expr. stack bottom ]
1348 // [ saved rsi ]
1349 // [ current rdi ]
1350 // [ methodOop ]
1351 // [ saved rbp, ] <--- rbp,
1352 // [ return address ]
1353 // [ local variable m ]
1354 // ...
1355 // [ local variable 1 ]
1356 // [ parameter n ]
1357 // ...
1358 // [ parameter 1 ] <--- rdi
1360 address AbstractInterpreterGenerator::generate_method_entry(AbstractInterpreter::MethodKind kind) {
1361 // determine code generation flags
1362 bool synchronized = false;
1363 address entry_point = NULL;
1365 switch (kind) {
1366 case Interpreter::zerolocals : break;
1367 case Interpreter::zerolocals_synchronized: synchronized = true; break;
1368 case Interpreter::native : entry_point = ((InterpreterGenerator*)this)->generate_native_entry(false); break;
1369 case Interpreter::native_synchronized : entry_point = ((InterpreterGenerator*)this)->generate_native_entry(true); break;
1370 case Interpreter::empty : entry_point = ((InterpreterGenerator*)this)->generate_empty_entry(); break;
1371 case Interpreter::accessor : entry_point = ((InterpreterGenerator*)this)->generate_accessor_entry(); break;
1372 case Interpreter::abstract : entry_point = ((InterpreterGenerator*)this)->generate_abstract_entry(); break;
1374 case Interpreter::java_lang_math_sin : // fall thru
1375 case Interpreter::java_lang_math_cos : // fall thru
1376 case Interpreter::java_lang_math_tan : // fall thru
1377 case Interpreter::java_lang_math_abs : // fall thru
1378 case Interpreter::java_lang_math_log : // fall thru
1379 case Interpreter::java_lang_math_log10 : // fall thru
1380 case Interpreter::java_lang_math_sqrt : entry_point = ((InterpreterGenerator*)this)->generate_math_entry(kind); break;
1381 default : ShouldNotReachHere(); break;
1382 }
1384 if (entry_point) return entry_point;
1386 return ((InterpreterGenerator*)this)->generate_normal_entry(synchronized);
1388 }
1390 // How much stack a method activation needs in words.
1391 int AbstractInterpreter::size_top_interpreter_activation(methodOop method) {
1393 const int stub_code = 4; // see generate_call_stub
1394 // Save space for one monitor to get into the interpreted method in case
1395 // the method is synchronized
1396 int monitor_size = method->is_synchronized() ?
1397 1*frame::interpreter_frame_monitor_size() : 0;
1399 // total overhead size: entry_size + (saved rbp, thru expr stack bottom).
1400 // be sure to change this if you add/subtract anything to/from the overhead area
1401 const int overhead_size = -frame::interpreter_frame_initial_sp_offset;
1403 const int method_stack = (method->max_locals() + method->max_stack()) *
1404 Interpreter::stackElementWords();
1405 return overhead_size + method_stack + stub_code;
1406 }
1408 // asm based interpreter deoptimization helpers
1410 int AbstractInterpreter::layout_activation(methodOop method,
1411 int tempcount,
1412 int popframe_extra_args,
1413 int moncount,
1414 int callee_param_count,
1415 int callee_locals,
1416 frame* caller,
1417 frame* interpreter_frame,
1418 bool is_top_frame) {
1419 // Note: This calculation must exactly parallel the frame setup
1420 // in AbstractInterpreterGenerator::generate_method_entry.
1421 // If interpreter_frame!=NULL, set up the method, locals, and monitors.
1422 // The frame interpreter_frame, if not NULL, is guaranteed to be the right size,
1423 // as determined by a previous call to this method.
1424 // It is also guaranteed to be walkable even though it is in a skeletal state
1425 // NOTE: return size is in words not bytes
1427 // fixed size of an interpreter frame:
1428 int max_locals = method->max_locals() * Interpreter::stackElementWords();
1429 int extra_locals = (method->max_locals() - method->size_of_parameters()) *
1430 Interpreter::stackElementWords();
1432 int overhead = frame::sender_sp_offset - frame::interpreter_frame_initial_sp_offset;
1434 // Our locals were accounted for by the caller (or last_frame_adjust on the transistion)
1435 // Since the callee parameters already account for the callee's params we only need to account for
1436 // the extra locals.
1439 int size = overhead +
1440 ((callee_locals - callee_param_count)*Interpreter::stackElementWords()) +
1441 (moncount*frame::interpreter_frame_monitor_size()) +
1442 tempcount*Interpreter::stackElementWords() + popframe_extra_args;
1444 if (interpreter_frame != NULL) {
1445 #ifdef ASSERT
1446 assert(caller->unextended_sp() == interpreter_frame->interpreter_frame_sender_sp(), "Frame not properly walkable");
1447 assert(caller->sp() == interpreter_frame->sender_sp(), "Frame not properly walkable(2)");
1448 #endif
1450 interpreter_frame->interpreter_frame_set_method(method);
1451 // NOTE the difference in using sender_sp and interpreter_frame_sender_sp
1452 // interpreter_frame_sender_sp is the original sp of the caller (the unextended_sp)
1453 // and sender_sp is fp+8
1454 intptr_t* locals = interpreter_frame->sender_sp() + max_locals - 1;
1456 interpreter_frame->interpreter_frame_set_locals(locals);
1457 BasicObjectLock* montop = interpreter_frame->interpreter_frame_monitor_begin();
1458 BasicObjectLock* monbot = montop - moncount;
1459 interpreter_frame->interpreter_frame_set_monitor_end(monbot);
1461 // Set last_sp
1462 intptr_t* rsp = (intptr_t*) monbot -
1463 tempcount*Interpreter::stackElementWords() -
1464 popframe_extra_args;
1465 interpreter_frame->interpreter_frame_set_last_sp(rsp);
1467 // All frames but the initial (oldest) interpreter frame we fill in have a
1468 // value for sender_sp that allows walking the stack but isn't
1469 // truly correct. Correct the value here.
1471 if (extra_locals != 0 &&
1472 interpreter_frame->sender_sp() == interpreter_frame->interpreter_frame_sender_sp() ) {
1473 interpreter_frame->set_interpreter_frame_sender_sp(caller->sp() + extra_locals);
1474 }
1475 *interpreter_frame->interpreter_frame_cache_addr() =
1476 method->constants()->cache();
1477 }
1478 return size;
1479 }
1482 //------------------------------------------------------------------------------------------------------------------------
1483 // Exceptions
1485 void TemplateInterpreterGenerator::generate_throw_exception() {
1486 // Entry point in previous activation (i.e., if the caller was interpreted)
1487 Interpreter::_rethrow_exception_entry = __ pc();
1489 // Restore sp to interpreter_frame_last_sp even though we are going
1490 // to empty the expression stack for the exception processing.
1491 __ movptr(Address(rbp, frame::interpreter_frame_last_sp_offset * wordSize), NULL_WORD);
1492 // rax,: exception
1493 // rdx: return address/pc that threw exception
1494 __ restore_bcp(); // rsi points to call/send
1495 __ restore_locals();
1497 // Entry point for exceptions thrown within interpreter code
1498 Interpreter::_throw_exception_entry = __ pc();
1499 // expression stack is undefined here
1500 // rax,: exception
1501 // rsi: exception bcp
1502 __ verify_oop(rax);
1504 // expression stack must be empty before entering the VM in case of an exception
1505 __ empty_expression_stack();
1506 __ empty_FPU_stack();
1507 // find exception handler address and preserve exception oop
1508 __ call_VM(rdx, CAST_FROM_FN_PTR(address, InterpreterRuntime::exception_handler_for_exception), rax);
1509 // rax,: exception handler entry point
1510 // rdx: preserved exception oop
1511 // rsi: bcp for exception handler
1512 __ push_ptr(rdx); // push exception which is now the only value on the stack
1513 __ jmp(rax); // jump to exception handler (may be _remove_activation_entry!)
1515 // If the exception is not handled in the current frame the frame is removed and
1516 // the exception is rethrown (i.e. exception continuation is _rethrow_exception).
1517 //
1518 // Note: At this point the bci is still the bxi for the instruction which caused
1519 // the exception and the expression stack is empty. Thus, for any VM calls
1520 // at this point, GC will find a legal oop map (with empty expression stack).
1522 // In current activation
1523 // tos: exception
1524 // rsi: exception bcp
1526 //
1527 // JVMTI PopFrame support
1528 //
1530 Interpreter::_remove_activation_preserving_args_entry = __ pc();
1531 __ empty_expression_stack();
1532 __ empty_FPU_stack();
1533 // Set the popframe_processing bit in pending_popframe_condition indicating that we are
1534 // currently handling popframe, so that call_VMs that may happen later do not trigger new
1535 // popframe handling cycles.
1536 __ get_thread(rcx);
1537 __ movl(rdx, Address(rcx, JavaThread::popframe_condition_offset()));
1538 __ orl(rdx, JavaThread::popframe_processing_bit);
1539 __ movl(Address(rcx, JavaThread::popframe_condition_offset()), rdx);
1541 {
1542 // Check to see whether we are returning to a deoptimized frame.
1543 // (The PopFrame call ensures that the caller of the popped frame is
1544 // either interpreted or compiled and deoptimizes it if compiled.)
1545 // In this case, we can't call dispatch_next() after the frame is
1546 // popped, but instead must save the incoming arguments and restore
1547 // them after deoptimization has occurred.
1548 //
1549 // Note that we don't compare the return PC against the
1550 // deoptimization blob's unpack entry because of the presence of
1551 // adapter frames in C2.
1552 Label caller_not_deoptimized;
1553 __ movptr(rdx, Address(rbp, frame::return_addr_offset * wordSize));
1554 __ super_call_VM_leaf(CAST_FROM_FN_PTR(address, InterpreterRuntime::interpreter_contains), rdx);
1555 __ testl(rax, rax);
1556 __ jcc(Assembler::notZero, caller_not_deoptimized);
1558 // Compute size of arguments for saving when returning to deoptimized caller
1559 __ get_method(rax);
1560 __ verify_oop(rax);
1561 __ load_unsigned_word(rax, Address(rax, in_bytes(methodOopDesc::size_of_parameters_offset())));
1562 __ shlptr(rax, Interpreter::logStackElementSize());
1563 __ restore_locals();
1564 __ subptr(rdi, rax);
1565 __ addptr(rdi, wordSize);
1566 // Save these arguments
1567 __ get_thread(rcx);
1568 __ super_call_VM_leaf(CAST_FROM_FN_PTR(address, Deoptimization::popframe_preserve_args), rcx, rax, rdi);
1570 __ remove_activation(vtos, rdx,
1571 /* throw_monitor_exception */ false,
1572 /* install_monitor_exception */ false,
1573 /* notify_jvmdi */ false);
1575 // Inform deoptimization that it is responsible for restoring these arguments
1576 __ get_thread(rcx);
1577 __ movl(Address(rcx, JavaThread::popframe_condition_offset()), JavaThread::popframe_force_deopt_reexecution_bit);
1579 // Continue in deoptimization handler
1580 __ jmp(rdx);
1582 __ bind(caller_not_deoptimized);
1583 }
1585 __ remove_activation(vtos, rdx,
1586 /* throw_monitor_exception */ false,
1587 /* install_monitor_exception */ false,
1588 /* notify_jvmdi */ false);
1590 // Finish with popframe handling
1591 // A previous I2C followed by a deoptimization might have moved the
1592 // outgoing arguments further up the stack. PopFrame expects the
1593 // mutations to those outgoing arguments to be preserved and other
1594 // constraints basically require this frame to look exactly as
1595 // though it had previously invoked an interpreted activation with
1596 // no space between the top of the expression stack (current
1597 // last_sp) and the top of stack. Rather than force deopt to
1598 // maintain this kind of invariant all the time we call a small
1599 // fixup routine to move the mutated arguments onto the top of our
1600 // expression stack if necessary.
1601 __ mov(rax, rsp);
1602 __ movptr(rbx, Address(rbp, frame::interpreter_frame_last_sp_offset * wordSize));
1603 __ get_thread(rcx);
1604 // PC must point into interpreter here
1605 __ set_last_Java_frame(rcx, noreg, rbp, __ pc());
1606 __ super_call_VM_leaf(CAST_FROM_FN_PTR(address, InterpreterRuntime::popframe_move_outgoing_args), rcx, rax, rbx);
1607 __ get_thread(rcx);
1608 __ reset_last_Java_frame(rcx, true, true);
1609 // Restore the last_sp and null it out
1610 __ movptr(rsp, Address(rbp, frame::interpreter_frame_last_sp_offset * wordSize));
1611 __ movptr(Address(rbp, frame::interpreter_frame_last_sp_offset * wordSize), NULL_WORD);
1613 __ restore_bcp();
1614 __ restore_locals();
1615 // The method data pointer was incremented already during
1616 // call profiling. We have to restore the mdp for the current bcp.
1617 if (ProfileInterpreter) {
1618 __ set_method_data_pointer_for_bcp();
1619 }
1621 // Clear the popframe condition flag
1622 __ get_thread(rcx);
1623 __ movl(Address(rcx, JavaThread::popframe_condition_offset()), JavaThread::popframe_inactive);
1625 __ dispatch_next(vtos);
1626 // end of PopFrame support
1628 Interpreter::_remove_activation_entry = __ pc();
1630 // preserve exception over this code sequence
1631 __ pop_ptr(rax);
1632 __ get_thread(rcx);
1633 __ movptr(Address(rcx, JavaThread::vm_result_offset()), rax);
1634 // remove the activation (without doing throws on illegalMonitorExceptions)
1635 __ remove_activation(vtos, rdx, false, true, false);
1636 // restore exception
1637 __ get_thread(rcx);
1638 __ movptr(rax, Address(rcx, JavaThread::vm_result_offset()));
1639 __ movptr(Address(rcx, JavaThread::vm_result_offset()), NULL_WORD);
1640 __ verify_oop(rax);
1642 // Inbetween activations - previous activation type unknown yet
1643 // compute continuation point - the continuation point expects
1644 // the following registers set up:
1645 //
1646 // rax,: exception
1647 // rdx: return address/pc that threw exception
1648 // rsp: expression stack of caller
1649 // rbp,: rbp, of caller
1650 __ push(rax); // save exception
1651 __ push(rdx); // save return address
1652 __ super_call_VM_leaf(CAST_FROM_FN_PTR(address, SharedRuntime::exception_handler_for_return_address), rdx);
1653 __ mov(rbx, rax); // save exception handler
1654 __ pop(rdx); // restore return address
1655 __ pop(rax); // restore exception
1656 // Note that an "issuing PC" is actually the next PC after the call
1657 __ jmp(rbx); // jump to exception handler of caller
1658 }
1661 //
1662 // JVMTI ForceEarlyReturn support
1663 //
1664 address TemplateInterpreterGenerator::generate_earlyret_entry_for(TosState state) {
1665 address entry = __ pc();
1667 __ restore_bcp();
1668 __ restore_locals();
1669 __ empty_expression_stack();
1670 __ empty_FPU_stack();
1671 __ load_earlyret_value(state);
1673 __ get_thread(rcx);
1674 __ movptr(rcx, Address(rcx, JavaThread::jvmti_thread_state_offset()));
1675 const Address cond_addr(rcx, JvmtiThreadState::earlyret_state_offset());
1677 // Clear the earlyret state
1678 __ movl(cond_addr, JvmtiThreadState::earlyret_inactive);
1680 __ remove_activation(state, rsi,
1681 false, /* throw_monitor_exception */
1682 false, /* install_monitor_exception */
1683 true); /* notify_jvmdi */
1684 __ jmp(rsi);
1685 return entry;
1686 } // end of ForceEarlyReturn support
1689 //------------------------------------------------------------------------------------------------------------------------
1690 // Helper for vtos entry point generation
1692 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) {
1693 assert(t->is_valid() && t->tos_in() == vtos, "illegal template");
1694 Label L;
1695 fep = __ pc(); __ push(ftos); __ jmp(L);
1696 dep = __ pc(); __ push(dtos); __ jmp(L);
1697 lep = __ pc(); __ push(ltos); __ jmp(L);
1698 aep = __ pc(); __ push(atos); __ jmp(L);
1699 bep = cep = sep = // fall through
1700 iep = __ pc(); __ push(itos); // fall through
1701 vep = __ pc(); __ bind(L); // fall through
1702 generate_and_dispatch(t);
1703 }
1705 //------------------------------------------------------------------------------------------------------------------------
1706 // Generation of individual instructions
1708 // helpers for generate_and_dispatch
1712 InterpreterGenerator::InterpreterGenerator(StubQueue* code)
1713 : TemplateInterpreterGenerator(code) {
1714 generate_all(); // down here so it can be "virtual"
1715 }
1717 //------------------------------------------------------------------------------------------------------------------------
1719 // Non-product code
1720 #ifndef PRODUCT
1721 address TemplateInterpreterGenerator::generate_trace_code(TosState state) {
1722 address entry = __ pc();
1724 // prepare expression stack
1725 __ pop(rcx); // pop return address so expression stack is 'pure'
1726 __ push(state); // save tosca
1728 // pass tosca registers as arguments & call tracer
1729 __ call_VM(noreg, CAST_FROM_FN_PTR(address, SharedRuntime::trace_bytecode), rcx, rax, rdx);
1730 __ mov(rcx, rax); // make sure return address is not destroyed by pop(state)
1731 __ pop(state); // restore tosca
1733 // return
1734 __ jmp(rcx);
1736 return entry;
1737 }
1740 void TemplateInterpreterGenerator::count_bytecode() {
1741 __ incrementl(ExternalAddress((address) &BytecodeCounter::_counter_value));
1742 }
1745 void TemplateInterpreterGenerator::histogram_bytecode(Template* t) {
1746 __ incrementl(ExternalAddress((address) &BytecodeHistogram::_counters[t->bytecode()]));
1747 }
1750 void TemplateInterpreterGenerator::histogram_bytecode_pair(Template* t) {
1751 __ mov32(ExternalAddress((address) &BytecodePairHistogram::_index), rbx);
1752 __ shrl(rbx, BytecodePairHistogram::log2_number_of_codes);
1753 __ orl(rbx, ((int)t->bytecode()) << BytecodePairHistogram::log2_number_of_codes);
1754 ExternalAddress table((address) BytecodePairHistogram::_counters);
1755 Address index(noreg, rbx, Address::times_4);
1756 __ incrementl(ArrayAddress(table, index));
1757 }
1760 void TemplateInterpreterGenerator::trace_bytecode(Template* t) {
1761 // Call a little run-time stub to avoid blow-up for each bytecode.
1762 // The run-time runtime saves the right registers, depending on
1763 // the tosca in-state for the given template.
1764 assert(Interpreter::trace_code(t->tos_in()) != NULL,
1765 "entry must have been generated");
1766 __ call(RuntimeAddress(Interpreter::trace_code(t->tos_in())));
1767 }
1770 void TemplateInterpreterGenerator::stop_interpreter_at() {
1771 Label L;
1772 __ cmp32(ExternalAddress((address) &BytecodeCounter::_counter_value),
1773 StopInterpreterAt);
1774 __ jcc(Assembler::notEqual, L);
1775 __ int3();
1776 __ bind(L);
1777 }
1778 #endif // !PRODUCT
1779 #endif // CC_INTERP
