1 /*
2 * Copyright 1997-2010 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 */
24
25 #include "incls/_precompiled.incl"
26 #include "incls/_methodHandles_x86.cpp.incl"
27
28 #define __ _masm->
29
30 address MethodHandleEntry::start_compiled_entry(MacroAssembler* _masm,
31 address interpreted_entry) {
32 // Just before the actual machine code entry point, allocate space
33 // for a MethodHandleEntry::Data record, so that we can manage everything
34 // from one base pointer.
35 __ align(wordSize);
36 address target = __ pc() + sizeof(Data);
37 while (__ pc() < target) {
38 __ nop();
39 __ align(wordSize);
40 }
41
42 MethodHandleEntry* me = (MethodHandleEntry*) __ pc();
43 me->set_end_address(__ pc()); // set a temporary end_address
44 me->set_from_interpreted_entry(interpreted_entry);
45 me->set_type_checking_entry(NULL);
46
47 return (address) me;
48 }
49
50 MethodHandleEntry* MethodHandleEntry::finish_compiled_entry(MacroAssembler* _masm,
51 address start_addr) {
52 MethodHandleEntry* me = (MethodHandleEntry*) start_addr;
53 assert(me->end_address() == start_addr, "valid ME");
54
55 // Fill in the real end_address:
56 __ align(wordSize);
57 me->set_end_address(__ pc());
58
59 return me;
60 }
61
62 #ifdef ASSERT
63 static void verify_argslot(MacroAssembler* _masm, Register argslot_reg,
64 const char* error_message) {
65 // Verify that argslot lies within (rsp, rbp].
66 Label L_ok, L_bad;
67 __ cmpptr(argslot_reg, rbp);
68 __ jccb(Assembler::above, L_bad);
69 __ cmpptr(rsp, argslot_reg);
70 __ jccb(Assembler::below, L_ok);
71 __ bind(L_bad);
72 __ stop(error_message);
73 __ bind(L_ok);
74 }
75 #endif
76
77
78 // Code generation
79 address MethodHandles::generate_method_handle_interpreter_entry(MacroAssembler* _masm) {
80 // rbx: methodOop
81 // rcx: receiver method handle (must load from sp[MethodTypeForm.vmslots])
82 // rsi/r13: sender SP (must preserve; see prepare_to_jump_from_interpreted)
83 // rdx: garbage temp, blown away
84
85 Register rbx_method = rbx;
86 Register rcx_recv = rcx;
87 Register rax_mtype = rax;
88 Register rdx_temp = rdx;
89
90 // emit WrongMethodType path first, to enable jccb back-branch from main path
91 Label wrong_method_type;
92 __ bind(wrong_method_type);
93 __ push(rax_mtype); // required mtype
94 __ push(rcx_recv); // bad mh (1st stacked argument)
95 __ jump(ExternalAddress(Interpreter::throw_WrongMethodType_entry()));
96
97 // here's where control starts out:
98 __ align(CodeEntryAlignment);
99 address entry_point = __ pc();
100
101 // fetch the MethodType from the method handle into rax (the 'check' register)
102 {
103 Register tem = rbx_method;
104 for (jint* pchase = methodOopDesc::method_type_offsets_chain(); (*pchase) != -1; pchase++) {
105 __ movptr(rax_mtype, Address(tem, *pchase));
106 tem = rax_mtype; // in case there is another indirection
107 }
108 }
109 Register rbx_temp = rbx_method; // done with incoming methodOop
110
111 // given the MethodType, find out where the MH argument is buried
112 __ movptr(rdx_temp, Address(rax_mtype,
113 __ delayed_value(java_dyn_MethodType::form_offset_in_bytes, rbx_temp)));
114 __ movl(rdx_temp, Address(rdx_temp,
115 __ delayed_value(java_dyn_MethodTypeForm::vmslots_offset_in_bytes, rbx_temp)));
116 __ movptr(rcx_recv, __ argument_address(rdx_temp));
117
118 __ check_method_handle_type(rax_mtype, rcx_recv, rdx_temp, wrong_method_type);
119 __ jump_to_method_handle_entry(rcx_recv, rdx_temp);
120
121 return entry_point;
122 }
123
124 // Helper to insert argument slots into the stack.
125 // arg_slots must be a multiple of stack_move_unit() and <= 0
126 void MethodHandles::insert_arg_slots(MacroAssembler* _masm,
127 RegisterOrConstant arg_slots,
128 int arg_mask,
129 Register rax_argslot,
130 Register rbx_temp, Register rdx_temp) {
131 assert_different_registers(rax_argslot, rbx_temp, rdx_temp,
132 (!arg_slots.is_register() ? rsp : arg_slots.as_register()));
133
134 #ifdef ASSERT
135 verify_argslot(_masm, rax_argslot, "insertion point must fall within current frame");
136 if (arg_slots.is_register()) {
137 Label L_ok, L_bad;
138 __ cmpptr(arg_slots.as_register(), (int32_t) NULL_WORD);
139 __ jccb(Assembler::greater, L_bad);
140 __ testl(arg_slots.as_register(), -stack_move_unit() - 1);
141 __ jccb(Assembler::zero, L_ok);
142 __ bind(L_bad);
143 __ stop("assert arg_slots <= 0 and clear low bits");
144 __ bind(L_ok);
145 } else {
146 assert(arg_slots.as_constant() <= 0, "");
147 assert(arg_slots.as_constant() % -stack_move_unit() == 0, "");
148 }
149 #endif //ASSERT
150
151 #ifdef _LP64
152 if (arg_slots.is_register()) {
153 // clean high bits of stack motion register (was loaded as an int)
154 __ movslq(arg_slots.as_register(), arg_slots.as_register());
155 }
156 #endif
157
158 // Make space on the stack for the inserted argument(s).
159 // Then pull down everything shallower than rax_argslot.
160 // The stacked return address gets pulled down with everything else.
161 // That is, copy [rsp, argslot) downward by -size words. In pseudo-code:
162 // rsp -= size;
163 // for (rdx = rsp + size; rdx < argslot; rdx++)
164 // rdx[-size] = rdx[0]
165 // argslot -= size;
166 __ mov(rdx_temp, rsp); // source pointer for copy
167 __ lea(rsp, Address(rsp, arg_slots, Address::times_ptr));
168 {
169 Label loop;
170 __ bind(loop);
171 // pull one word down each time through the loop
172 __ movptr(rbx_temp, Address(rdx_temp, 0));
173 __ movptr(Address(rdx_temp, arg_slots, Address::times_ptr), rbx_temp);
174 __ addptr(rdx_temp, wordSize);
175 __ cmpptr(rdx_temp, rax_argslot);
176 __ jccb(Assembler::less, loop);
177 }
178
179 // Now move the argslot down, to point to the opened-up space.
180 __ lea(rax_argslot, Address(rax_argslot, arg_slots, Address::times_ptr));
181 }
182
183 // Helper to remove argument slots from the stack.
184 // arg_slots must be a multiple of stack_move_unit() and >= 0
185 void MethodHandles::remove_arg_slots(MacroAssembler* _masm,
186 RegisterOrConstant arg_slots,
187 Register rax_argslot,
188 Register rbx_temp, Register rdx_temp) {
189 assert_different_registers(rax_argslot, rbx_temp, rdx_temp,
190 (!arg_slots.is_register() ? rsp : arg_slots.as_register()));
191
192 #ifdef ASSERT
193 // Verify that [argslot..argslot+size) lies within (rsp, rbp).
194 __ lea(rbx_temp, Address(rax_argslot, arg_slots, Address::times_ptr));
195 verify_argslot(_masm, rbx_temp, "deleted argument(s) must fall within current frame");
196 if (arg_slots.is_register()) {
197 Label L_ok, L_bad;
198 __ cmpptr(arg_slots.as_register(), (int32_t) NULL_WORD);
199 __ jccb(Assembler::less, L_bad);
200 __ testl(arg_slots.as_register(), -stack_move_unit() - 1);
201 __ jccb(Assembler::zero, L_ok);
202 __ bind(L_bad);
203 __ stop("assert arg_slots >= 0 and clear low bits");
204 __ bind(L_ok);
205 } else {
206 assert(arg_slots.as_constant() >= 0, "");
207 assert(arg_slots.as_constant() % -stack_move_unit() == 0, "");
208 }
209 #endif //ASSERT
210
211 #ifdef _LP64
212 if (false) { // not needed, since register is positive
213 // clean high bits of stack motion register (was loaded as an int)
214 if (arg_slots.is_register())
215 __ movslq(arg_slots.as_register(), arg_slots.as_register());
216 }
217 #endif
218
219 // Pull up everything shallower than rax_argslot.
220 // Then remove the excess space on the stack.
221 // The stacked return address gets pulled up with everything else.
222 // That is, copy [rsp, argslot) upward by size words. In pseudo-code:
223 // for (rdx = argslot-1; rdx >= rsp; --rdx)
224 // rdx[size] = rdx[0]
225 // argslot += size;
226 // rsp += size;
227 __ lea(rdx_temp, Address(rax_argslot, -wordSize)); // source pointer for copy
228 {
229 Label loop;
230 __ bind(loop);
231 // pull one word up each time through the loop
232 __ movptr(rbx_temp, Address(rdx_temp, 0));
233 __ movptr(Address(rdx_temp, arg_slots, Address::times_ptr), rbx_temp);
234 __ addptr(rdx_temp, -wordSize);
235 __ cmpptr(rdx_temp, rsp);
236 __ jccb(Assembler::greaterEqual, loop);
237 }
238
239 // Now move the argslot up, to point to the just-copied block.
240 __ lea(rsp, Address(rsp, arg_slots, Address::times_ptr));
241 // And adjust the argslot address to point at the deletion point.
242 __ lea(rax_argslot, Address(rax_argslot, arg_slots, Address::times_ptr));
243 }
244
245 #ifndef PRODUCT
246 extern "C" void print_method_handle(oop mh);
247 void trace_method_handle_stub(const char* adaptername,
248 oop mh,
249 intptr_t* entry_sp,
250 intptr_t* saved_sp,
251 intptr_t* saved_bp) {
252 // called as a leaf from native code: do not block the JVM!
253 intptr_t* last_sp = (intptr_t*) saved_bp[frame::interpreter_frame_last_sp_offset];
254 intptr_t* base_sp = (intptr_t*) saved_bp[frame::interpreter_frame_monitor_block_top_offset];
255 printf("MH %s mh="INTPTR_FORMAT" sp=("INTPTR_FORMAT"+"INTX_FORMAT") stack_size="INTX_FORMAT" bp="INTPTR_FORMAT"\n",
256 adaptername, (intptr_t)mh, (intptr_t)entry_sp, (intptr_t)(saved_sp - entry_sp), (intptr_t)(base_sp - last_sp), (intptr_t)saved_bp);
257 if (last_sp != saved_sp)
258 printf("*** last_sp="INTPTR_FORMAT"\n", (intptr_t)last_sp);
259 if (Verbose) print_method_handle(mh);
260 }
261 #endif //PRODUCT
262
263 // Generate an "entry" field for a method handle.
264 // This determines how the method handle will respond to calls.
265 void MethodHandles::generate_method_handle_stub(MacroAssembler* _masm, MethodHandles::EntryKind ek) {
266 // Here is the register state during an interpreted call,
267 // as set up by generate_method_handle_interpreter_entry():
268 // - rbx: garbage temp (was MethodHandle.invoke methodOop, unused)
269 // - rcx: receiver method handle
270 // - rax: method handle type (only used by the check_mtype entry point)
271 // - rsi/r13: sender SP (must preserve; see prepare_to_jump_from_interpreted)
272 // - rdx: garbage temp, can blow away
273
274 Register rcx_recv = rcx;
275 Register rax_argslot = rax;
276 Register rbx_temp = rbx;
277 Register rdx_temp = rdx;
278
279 // This guy is set up by prepare_to_jump_from_interpreted (from interpreted calls)
280 // and gen_c2i_adapter (from compiled calls):
281 Register saved_last_sp = LP64_ONLY(r13) NOT_LP64(rsi);
282
283 guarantee(java_dyn_MethodHandle::vmentry_offset_in_bytes() != 0, "must have offsets");
284
285 // some handy addresses
286 Address rbx_method_fie( rbx, methodOopDesc::from_interpreted_offset() );
287
288 Address rcx_mh_vmtarget( rcx_recv, java_dyn_MethodHandle::vmtarget_offset_in_bytes() );
289 Address rcx_dmh_vmindex( rcx_recv, sun_dyn_DirectMethodHandle::vmindex_offset_in_bytes() );
290
291 Address rcx_bmh_vmargslot( rcx_recv, sun_dyn_BoundMethodHandle::vmargslot_offset_in_bytes() );
292 Address rcx_bmh_argument( rcx_recv, sun_dyn_BoundMethodHandle::argument_offset_in_bytes() );
293
294 Address rcx_amh_vmargslot( rcx_recv, sun_dyn_AdapterMethodHandle::vmargslot_offset_in_bytes() );
295 Address rcx_amh_argument( rcx_recv, sun_dyn_AdapterMethodHandle::argument_offset_in_bytes() );
296 Address rcx_amh_conversion( rcx_recv, sun_dyn_AdapterMethodHandle::conversion_offset_in_bytes() );
297 Address vmarg; // __ argument_address(vmargslot)
298
299 const int java_mirror_offset = klassOopDesc::klass_part_offset_in_bytes() + Klass::java_mirror_offset_in_bytes();
300
301 if (have_entry(ek)) {
302 __ nop(); // empty stubs make SG sick
303 return;
304 }
305
306 address interp_entry = __ pc();
307 if (UseCompressedOops) __ unimplemented("UseCompressedOops");
308
309 #ifndef PRODUCT
310 if (TraceMethodHandles) {
311 __ push(rax); __ push(rbx); __ push(rcx); __ push(rdx); __ push(rsi); __ push(rdi);
312 __ lea(rax, Address(rsp, wordSize*6)); // entry_sp
313 // arguments:
314 __ push(rbp); // interpreter frame pointer
315 __ push(rsi); // saved_sp
316 __ push(rax); // entry_sp
317 __ push(rcx); // mh
318 __ push(rcx);
319 __ movptr(Address(rsp, 0), (intptr_t)entry_name(ek));
320 __ call_VM_leaf(CAST_FROM_FN_PTR(address, trace_method_handle_stub), 5);
321 __ pop(rdi); __ pop(rsi); __ pop(rdx); __ pop(rcx); __ pop(rbx); __ pop(rax);
322 }
323 #endif //PRODUCT
324
325 switch ((int) ek) {
326 case _raise_exception:
327 {
328 // Not a real MH entry, but rather shared code for raising an exception.
329 // Extra local arguments are pushed on stack, as required type at TOS+8,
330 // failing object (or NULL) at TOS+4, failing bytecode type at TOS.
331 // Beyond those local arguments are the PC, of course.
332 Register rdx_code = rdx_temp;
333 Register rcx_fail = rcx_recv;
334 Register rax_want = rax_argslot;
335 Register rdi_pc = rdi;
336 __ pop(rdx_code); // TOS+0
337 __ pop(rcx_fail); // TOS+4
338 __ pop(rax_want); // TOS+8
339 __ pop(rdi_pc); // caller PC
340
341 __ mov(rsp, rsi); // cut the stack back to where the caller started
342
343 // Repush the arguments as if coming from the interpreter.
344 __ push(rdx_code);
345 __ push(rcx_fail);
346 __ push(rax_want);
347
348 Register rbx_method = rbx_temp;
349 Label no_method;
350 // FIXME: fill in _raise_exception_method with a suitable sun.dyn method
351 __ movptr(rbx_method, ExternalAddress((address) &_raise_exception_method));
352 __ testptr(rbx_method, rbx_method);
353 __ jccb(Assembler::zero, no_method);
354 int jobject_oop_offset = 0;
355 __ movptr(rbx_method, Address(rbx_method, jobject_oop_offset)); // dereference the jobject
356 __ testptr(rbx_method, rbx_method);
357 __ jccb(Assembler::zero, no_method);
358 __ verify_oop(rbx_method);
359 __ push(rdi_pc); // and restore caller PC
360 __ jmp(rbx_method_fie);
361
362 // If we get here, the Java runtime did not do its job of creating the exception.
363 // Do something that is at least causes a valid throw from the interpreter.
364 __ bind(no_method);
365 __ pop(rax_want);
366 __ pop(rcx_fail);
367 __ push(rax_want);
368 __ push(rcx_fail);
369 __ jump(ExternalAddress(Interpreter::throw_WrongMethodType_entry()));
370 }
371 break;
372
373 case _invokestatic_mh:
374 case _invokespecial_mh:
375 {
376 Register rbx_method = rbx_temp;
377 __ movptr(rbx_method, rcx_mh_vmtarget); // target is a methodOop
378 __ verify_oop(rbx_method);
379 // same as TemplateTable::invokestatic or invokespecial,
380 // minus the CP setup and profiling:
381 if (ek == _invokespecial_mh) {
382 // Must load & check the first argument before entering the target method.
383 __ load_method_handle_vmslots(rax_argslot, rcx_recv, rdx_temp);
384 __ movptr(rcx_recv, __ argument_address(rax_argslot, -1));
385 __ null_check(rcx_recv);
386 __ verify_oop(rcx_recv);
387 }
388 __ jmp(rbx_method_fie);
389 }
390 break;
391
392 case _invokevirtual_mh:
393 {
394 // same as TemplateTable::invokevirtual,
395 // minus the CP setup and profiling:
396
397 // pick out the vtable index and receiver offset from the MH,
398 // and then we can discard it:
399 __ load_method_handle_vmslots(rax_argslot, rcx_recv, rdx_temp);
400 Register rbx_index = rbx_temp;
401 __ movl(rbx_index, rcx_dmh_vmindex);
402 // Note: The verifier allows us to ignore rcx_mh_vmtarget.
403 __ movptr(rcx_recv, __ argument_address(rax_argslot, -1));
404 __ null_check(rcx_recv, oopDesc::klass_offset_in_bytes());
405
406 // get receiver klass
407 Register rax_klass = rax_argslot;
408 __ load_klass(rax_klass, rcx_recv);
409 __ verify_oop(rax_klass);
410
411 // get target methodOop & entry point
412 const int base = instanceKlass::vtable_start_offset() * wordSize;
413 assert(vtableEntry::size() * wordSize == wordSize, "adjust the scaling in the code below");
414 Address vtable_entry_addr(rax_klass,
415 rbx_index, Address::times_ptr,
416 base + vtableEntry::method_offset_in_bytes());
417 Register rbx_method = rbx_temp;
418 __ movptr(rbx_method, vtable_entry_addr);
419
420 __ verify_oop(rbx_method);
421 __ jmp(rbx_method_fie);
422 }
423 break;
424
425 case _invokeinterface_mh:
426 {
427 // same as TemplateTable::invokeinterface,
428 // minus the CP setup and profiling:
429
430 // pick out the interface and itable index from the MH.
431 __ load_method_handle_vmslots(rax_argslot, rcx_recv, rdx_temp);
432 Register rdx_intf = rdx_temp;
433 Register rbx_index = rbx_temp;
434 __ movptr(rdx_intf, rcx_mh_vmtarget);
435 __ movl(rbx_index, rcx_dmh_vmindex);
436 __ movptr(rcx_recv, __ argument_address(rax_argslot, -1));
437 __ null_check(rcx_recv, oopDesc::klass_offset_in_bytes());
438
439 // get receiver klass
440 Register rax_klass = rax_argslot;
441 __ load_klass(rax_klass, rcx_recv);
442 __ verify_oop(rax_klass);
443
444 Register rdi_temp = rdi;
445 Register rbx_method = rbx_index;
446
447 // get interface klass
448 Label no_such_interface;
449 __ verify_oop(rdx_intf);
450 __ lookup_interface_method(rax_klass, rdx_intf,
451 // note: next two args must be the same:
452 rbx_index, rbx_method,
453 rdi_temp,
454 no_such_interface);
455
456 __ verify_oop(rbx_method);
457 __ jmp(rbx_method_fie);
458 __ hlt();
459
460 __ bind(no_such_interface);
461 // Throw an exception.
462 // For historical reasons, it will be IncompatibleClassChangeError.
463 __ pushptr(Address(rdx_intf, java_mirror_offset)); // required interface
464 __ push(rcx_recv); // bad receiver
465 __ push((int)Bytecodes::_invokeinterface); // who is complaining?
466 __ jump(ExternalAddress(from_interpreted_entry(_raise_exception)));
467 }
468 break;
469
470 case _bound_ref_mh:
471 case _bound_int_mh:
472 case _bound_long_mh:
473 case _bound_ref_direct_mh:
474 case _bound_int_direct_mh:
475 case _bound_long_direct_mh:
476 {
477 bool direct_to_method = (ek >= _bound_ref_direct_mh);
478 BasicType arg_type = T_ILLEGAL;
479 int arg_mask = _INSERT_NO_MASK;
480 int arg_slots = -1;
481 get_ek_bound_mh_info(ek, arg_type, arg_mask, arg_slots);
482
483 // make room for the new argument:
484 __ movl(rax_argslot, rcx_bmh_vmargslot);
485 __ lea(rax_argslot, __ argument_address(rax_argslot));
486 insert_arg_slots(_masm, arg_slots * stack_move_unit(), arg_mask,
487 rax_argslot, rbx_temp, rdx_temp);
488
489 // store bound argument into the new stack slot:
490 __ movptr(rbx_temp, rcx_bmh_argument);
491 Address prim_value_addr(rbx_temp, java_lang_boxing_object::value_offset_in_bytes(arg_type));
492 if (arg_type == T_OBJECT) {
493 __ movptr(Address(rax_argslot, 0), rbx_temp);
494 } else {
495 __ load_sized_value(rdx_temp, prim_value_addr,
496 type2aelembytes(arg_type), is_signed_subword_type(arg_type));
497 __ movptr(Address(rax_argslot, 0), rdx_temp);
498 #ifndef _LP64
499 if (arg_slots == 2) {
500 __ movl(rdx_temp, prim_value_addr.plus_disp(wordSize));
501 __ movl(Address(rax_argslot, Interpreter::stackElementSize()), rdx_temp);
502 }
503 #endif //_LP64
504 }
505
506 if (direct_to_method) {
507 Register rbx_method = rbx_temp;
508 __ movptr(rbx_method, rcx_mh_vmtarget);
509 __ verify_oop(rbx_method);
510 __ jmp(rbx_method_fie);
511 } else {
512 __ movptr(rcx_recv, rcx_mh_vmtarget);
513 __ verify_oop(rcx_recv);
514 __ jump_to_method_handle_entry(rcx_recv, rdx_temp);
515 }
516 }
517 break;
518
519 case _adapter_retype_only:
520 case _adapter_retype_raw:
521 // immediately jump to the next MH layer:
522 __ movptr(rcx_recv, rcx_mh_vmtarget);
523 __ verify_oop(rcx_recv);
524 __ jump_to_method_handle_entry(rcx_recv, rdx_temp);
525 // This is OK when all parameter types widen.
526 // It is also OK when a return type narrows.
527 break;
528
529 case _adapter_check_cast:
530 {
531 // temps:
532 Register rbx_klass = rbx_temp; // interesting AMH data
533
534 // check a reference argument before jumping to the next layer of MH:
535 __ movl(rax_argslot, rcx_amh_vmargslot);
536 vmarg = __ argument_address(rax_argslot);
537
538 // What class are we casting to?
539 __ movptr(rbx_klass, rcx_amh_argument); // this is a Class object!
540 __ movptr(rbx_klass, Address(rbx_klass, java_lang_Class::klass_offset_in_bytes()));
541
542 Label done;
543 __ movptr(rdx_temp, vmarg);
544 __ testptr(rdx_temp, rdx_temp);
545 __ jccb(Assembler::zero, done); // no cast if null
546 __ load_klass(rdx_temp, rdx_temp);
547
548 // live at this point:
549 // - rbx_klass: klass required by the target method
550 // - rdx_temp: argument klass to test
551 // - rcx_recv: adapter method handle
552 __ check_klass_subtype(rdx_temp, rbx_klass, rax_argslot, done);
553
554 // If we get here, the type check failed!
555 // Call the wrong_method_type stub, passing the failing argument type in rax.
556 Register rax_mtype = rax_argslot;
557 __ movl(rax_argslot, rcx_amh_vmargslot); // reload argslot field
558 __ movptr(rdx_temp, vmarg);
559
560 __ pushptr(rcx_amh_argument); // required class
561 __ push(rdx_temp); // bad object
562 __ push((int)Bytecodes::_checkcast); // who is complaining?
563 __ jump(ExternalAddress(from_interpreted_entry(_raise_exception)));
564
565 __ bind(done);
566 // get the new MH:
567 __ movptr(rcx_recv, rcx_mh_vmtarget);
568 __ jump_to_method_handle_entry(rcx_recv, rdx_temp);
569 }
570 break;
571
572 case _adapter_prim_to_prim:
573 case _adapter_ref_to_prim:
574 // handled completely by optimized cases
575 __ stop("init_AdapterMethodHandle should not issue this");
576 break;
577
578 case _adapter_opt_i2i: // optimized subcase of adapt_prim_to_prim
579 //case _adapter_opt_f2i: // optimized subcase of adapt_prim_to_prim
580 case _adapter_opt_l2i: // optimized subcase of adapt_prim_to_prim
581 case _adapter_opt_unboxi: // optimized subcase of adapt_ref_to_prim
582 {
583 // perform an in-place conversion to int or an int subword
584 __ movl(rax_argslot, rcx_amh_vmargslot);
585 vmarg = __ argument_address(rax_argslot);
586
587 switch (ek) {
588 case _adapter_opt_i2i:
589 __ movl(rdx_temp, vmarg);
590 break;
591 case _adapter_opt_l2i:
592 {
593 // just delete the extra slot; on a little-endian machine we keep the first
594 __ lea(rax_argslot, __ argument_address(rax_argslot, 1));
595 remove_arg_slots(_masm, -stack_move_unit(),
596 rax_argslot, rbx_temp, rdx_temp);
597 vmarg = Address(rax_argslot, -Interpreter::stackElementSize());
598 __ movl(rdx_temp, vmarg);
599 }
600 break;
601 case _adapter_opt_unboxi:
602 {
603 // Load the value up from the heap.
604 __ movptr(rdx_temp, vmarg);
605 int value_offset = java_lang_boxing_object::value_offset_in_bytes(T_INT);
606 #ifdef ASSERT
607 for (int bt = T_BOOLEAN; bt < T_INT; bt++) {
608 if (is_subword_type(BasicType(bt)))
609 assert(value_offset == java_lang_boxing_object::value_offset_in_bytes(BasicType(bt)), "");
610 }
611 #endif
612 __ null_check(rdx_temp, value_offset);
613 __ movl(rdx_temp, Address(rdx_temp, value_offset));
614 // We load this as a word. Because we are little-endian,
615 // the low bits will be correct, but the high bits may need cleaning.
616 // The vminfo will guide us to clean those bits.
617 }
618 break;
619 default:
620 ShouldNotReachHere();
621 }
622
623 // Do the requested conversion and store the value.
624 Register rbx_vminfo = rbx_temp;
625 __ movl(rbx_vminfo, rcx_amh_conversion);
626 assert(CONV_VMINFO_SHIFT == 0, "preshifted");
627
628 // get the new MH:
629 __ movptr(rcx_recv, rcx_mh_vmtarget);
630 // (now we are done with the old MH)
631
632 // original 32-bit vmdata word must be of this form:
633 // | MBZ:6 | signBitCount:8 | srcDstTypes:8 | conversionOp:8 |
634 __ xchgptr(rcx, rbx_vminfo); // free rcx for shifts
635 __ shll(rdx_temp /*, rcx*/);
636 Label zero_extend, done;
637 __ testl(rcx, CONV_VMINFO_SIGN_FLAG);
638 __ jccb(Assembler::zero, zero_extend);
639
640 // this path is taken for int->byte, int->short
641 __ sarl(rdx_temp /*, rcx*/);
642 __ jmpb(done);
643
644 __ bind(zero_extend);
645 // this is taken for int->char
646 __ shrl(rdx_temp /*, rcx*/);
647
648 __ bind(done);
649 __ movl(vmarg, rdx_temp); // Store the value.
650 __ xchgptr(rcx, rbx_vminfo); // restore rcx_recv
651
652 __ jump_to_method_handle_entry(rcx_recv, rdx_temp);
653 }
654 break;
655
656 case _adapter_opt_i2l: // optimized subcase of adapt_prim_to_prim
657 case _adapter_opt_unboxl: // optimized subcase of adapt_ref_to_prim
658 {
659 // perform an in-place int-to-long or ref-to-long conversion
660 __ movl(rax_argslot, rcx_amh_vmargslot);
661
662 // on a little-endian machine we keep the first slot and add another after
663 __ lea(rax_argslot, __ argument_address(rax_argslot, 1));
664 insert_arg_slots(_masm, stack_move_unit(), _INSERT_INT_MASK,
665 rax_argslot, rbx_temp, rdx_temp);
666 Address vmarg1(rax_argslot, -Interpreter::stackElementSize());
667 Address vmarg2 = vmarg1.plus_disp(Interpreter::stackElementSize());
668
669 switch (ek) {
670 case _adapter_opt_i2l:
671 {
672 #ifdef _LP64
673 __ movslq(rdx_temp, vmarg1); // Load sign-extended
674 __ movq(vmarg1, rdx_temp); // Store into first slot
675 #else
676 __ movl(rdx_temp, vmarg1);
677 __ sarl(rdx_temp, BitsPerInt - 1); // __ extend_sign()
678 __ movl(vmarg2, rdx_temp); // store second word
679 #endif
680 }
681 break;
682 case _adapter_opt_unboxl:
683 {
684 // Load the value up from the heap.
685 __ movptr(rdx_temp, vmarg1);
686 int value_offset = java_lang_boxing_object::value_offset_in_bytes(T_LONG);
687 assert(value_offset == java_lang_boxing_object::value_offset_in_bytes(T_DOUBLE), "");
688 __ null_check(rdx_temp, value_offset);
689 #ifdef _LP64
690 __ movq(rbx_temp, Address(rdx_temp, value_offset));
691 __ movq(vmarg1, rbx_temp);
692 #else
693 __ movl(rbx_temp, Address(rdx_temp, value_offset + 0*BytesPerInt));
694 __ movl(rdx_temp, Address(rdx_temp, value_offset + 1*BytesPerInt));
695 __ movl(vmarg1, rbx_temp);
696 __ movl(vmarg2, rdx_temp);
697 #endif
698 }
699 break;
700 default:
701 ShouldNotReachHere();
702 }
703
704 __ movptr(rcx_recv, rcx_mh_vmtarget);
705 __ jump_to_method_handle_entry(rcx_recv, rdx_temp);
706 }
707 break;
708
709 case _adapter_opt_f2d: // optimized subcase of adapt_prim_to_prim
710 case _adapter_opt_d2f: // optimized subcase of adapt_prim_to_prim
711 {
712 // perform an in-place floating primitive conversion
713 __ movl(rax_argslot, rcx_amh_vmargslot);
714 __ lea(rax_argslot, __ argument_address(rax_argslot, 1));
715 if (ek == _adapter_opt_f2d) {
716 insert_arg_slots(_masm, stack_move_unit(), _INSERT_INT_MASK,
717 rax_argslot, rbx_temp, rdx_temp);
718 }
719 Address vmarg(rax_argslot, -Interpreter::stackElementSize());
720
721 #ifdef _LP64
722 if (ek == _adapter_opt_f2d) {
723 __ movflt(xmm0, vmarg);
724 __ cvtss2sd(xmm0, xmm0);
725 __ movdbl(vmarg, xmm0);
726 } else {
727 __ movdbl(xmm0, vmarg);
728 __ cvtsd2ss(xmm0, xmm0);
729 __ movflt(vmarg, xmm0);
730 }
731 #else //_LP64
732 if (ek == _adapter_opt_f2d) {
733 __ fld_s(vmarg); // load float to ST0
734 __ fstp_s(vmarg); // store single
735 } else {
736 __ fld_d(vmarg); // load double to ST0
737 __ fstp_s(vmarg); // store single
738 }
739 #endif //_LP64
740
741 if (ek == _adapter_opt_d2f) {
742 remove_arg_slots(_masm, -stack_move_unit(),
743 rax_argslot, rbx_temp, rdx_temp);
744 }
745
746 __ movptr(rcx_recv, rcx_mh_vmtarget);
747 __ jump_to_method_handle_entry(rcx_recv, rdx_temp);
748 }
749 break;
750
751 case _adapter_prim_to_ref:
752 __ unimplemented(entry_name(ek)); // %%% FIXME: NYI
753 break;
754
755 case _adapter_swap_args:
756 case _adapter_rot_args:
757 // handled completely by optimized cases
758 __ stop("init_AdapterMethodHandle should not issue this");
759 break;
760
761 case _adapter_opt_swap_1:
762 case _adapter_opt_swap_2:
763 case _adapter_opt_rot_1_up:
764 case _adapter_opt_rot_1_down:
765 case _adapter_opt_rot_2_up:
766 case _adapter_opt_rot_2_down:
767 {
768 int swap_bytes = 0, rotate = 0;
769 get_ek_adapter_opt_swap_rot_info(ek, swap_bytes, rotate);
770
771 // 'argslot' is the position of the first argument to swap
772 __ movl(rax_argslot, rcx_amh_vmargslot);
773 __ lea(rax_argslot, __ argument_address(rax_argslot));
774
775 // 'vminfo' is the second
776 Register rbx_destslot = rbx_temp;
777 __ movl(rbx_destslot, rcx_amh_conversion);
778 assert(CONV_VMINFO_SHIFT == 0, "preshifted");
779 __ andl(rbx_destslot, CONV_VMINFO_MASK);
780 __ lea(rbx_destslot, __ argument_address(rbx_destslot));
781 DEBUG_ONLY(verify_argslot(_masm, rbx_destslot, "swap point must fall within current frame"));
782
783 if (!rotate) {
784 for (int i = 0; i < swap_bytes; i += wordSize) {
785 __ movptr(rdx_temp, Address(rax_argslot , i));
786 __ push(rdx_temp);
787 __ movptr(rdx_temp, Address(rbx_destslot, i));
788 __ movptr(Address(rax_argslot, i), rdx_temp);
789 __ pop(rdx_temp);
790 __ movptr(Address(rbx_destslot, i), rdx_temp);
791 }
792 } else {
793 // push the first chunk, which is going to get overwritten
794 for (int i = swap_bytes; (i -= wordSize) >= 0; ) {
795 __ movptr(rdx_temp, Address(rax_argslot, i));
796 __ push(rdx_temp);
797 }
798
799 if (rotate > 0) {
800 // rotate upward
801 __ subptr(rax_argslot, swap_bytes);
802 #ifdef ASSERT
803 {
804 // Verify that argslot > destslot, by at least swap_bytes.
805 Label L_ok;
806 __ cmpptr(rax_argslot, rbx_destslot);
807 __ jccb(Assembler::aboveEqual, L_ok);
808 __ stop("source must be above destination (upward rotation)");
809 __ bind(L_ok);
810 }
811 #endif
812 // work argslot down to destslot, copying contiguous data upwards
813 // pseudo-code:
814 // rax = src_addr - swap_bytes
815 // rbx = dest_addr
816 // while (rax >= rbx) *(rax + swap_bytes) = *(rax + 0), rax--;
817 Label loop;
818 __ bind(loop);
819 __ movptr(rdx_temp, Address(rax_argslot, 0));
820 __ movptr(Address(rax_argslot, swap_bytes), rdx_temp);
821 __ addptr(rax_argslot, -wordSize);
822 __ cmpptr(rax_argslot, rbx_destslot);
823 __ jccb(Assembler::aboveEqual, loop);
824 } else {
825 __ addptr(rax_argslot, swap_bytes);
826 #ifdef ASSERT
827 {
828 // Verify that argslot < destslot, by at least swap_bytes.
829 Label L_ok;
830 __ cmpptr(rax_argslot, rbx_destslot);
831 __ jccb(Assembler::belowEqual, L_ok);
832 __ stop("source must be below destination (downward rotation)");
833 __ bind(L_ok);
834 }
835 #endif
836 // work argslot up to destslot, copying contiguous data downwards
837 // pseudo-code:
838 // rax = src_addr + swap_bytes
839 // rbx = dest_addr
840 // while (rax <= rbx) *(rax - swap_bytes) = *(rax + 0), rax++;
841 Label loop;
842 __ bind(loop);
843 __ movptr(rdx_temp, Address(rax_argslot, 0));
844 __ movptr(Address(rax_argslot, -swap_bytes), rdx_temp);
845 __ addptr(rax_argslot, wordSize);
846 __ cmpptr(rax_argslot, rbx_destslot);
847 __ jccb(Assembler::belowEqual, loop);
848 }
849
850 // pop the original first chunk into the destination slot, now free
851 for (int i = 0; i < swap_bytes; i += wordSize) {
852 __ pop(rdx_temp);
853 __ movptr(Address(rbx_destslot, i), rdx_temp);
854 }
855 }
856
857 __ movptr(rcx_recv, rcx_mh_vmtarget);
858 __ jump_to_method_handle_entry(rcx_recv, rdx_temp);
859 }
860 break;
861
862 case _adapter_dup_args:
863 {
864 // 'argslot' is the position of the first argument to duplicate
865 __ movl(rax_argslot, rcx_amh_vmargslot);
866 __ lea(rax_argslot, __ argument_address(rax_argslot));
867
868 // 'stack_move' is negative number of words to duplicate
869 Register rdx_stack_move = rdx_temp;
870 __ movl2ptr(rdx_stack_move, rcx_amh_conversion);
871 __ sarptr(rdx_stack_move, CONV_STACK_MOVE_SHIFT);
872
873 int argslot0_num = 0;
874 Address argslot0 = __ argument_address(RegisterOrConstant(argslot0_num));
875 assert(argslot0.base() == rsp, "");
876 int pre_arg_size = argslot0.disp();
877 assert(pre_arg_size % wordSize == 0, "");
878 assert(pre_arg_size > 0, "must include PC");
879
880 // remember the old rsp+1 (argslot[0])
881 Register rbx_oldarg = rbx_temp;
882 __ lea(rbx_oldarg, argslot0);
883
884 // move rsp down to make room for dups
885 __ lea(rsp, Address(rsp, rdx_stack_move, Address::times_ptr));
886
887 // compute the new rsp+1 (argslot[0])
888 Register rdx_newarg = rdx_temp;
889 __ lea(rdx_newarg, argslot0);
890
891 __ push(rdi); // need a temp
892 // (preceding push must be done after arg addresses are taken!)
893
894 // pull down the pre_arg_size data (PC)
895 for (int i = -pre_arg_size; i < 0; i += wordSize) {
896 __ movptr(rdi, Address(rbx_oldarg, i));
897 __ movptr(Address(rdx_newarg, i), rdi);
898 }
899
900 // copy from rax_argslot[0...] down to new_rsp[1...]
901 // pseudo-code:
902 // rbx = old_rsp+1
903 // rdx = new_rsp+1
904 // rax = argslot
905 // while (rdx < rbx) *rdx++ = *rax++
906 Label loop;
907 __ bind(loop);
908 __ movptr(rdi, Address(rax_argslot, 0));
909 __ movptr(Address(rdx_newarg, 0), rdi);
910 __ addptr(rax_argslot, wordSize);
911 __ addptr(rdx_newarg, wordSize);
912 __ cmpptr(rdx_newarg, rbx_oldarg);
913 __ jccb(Assembler::less, loop);
914
915 __ pop(rdi); // restore temp
916
917 __ movptr(rcx_recv, rcx_mh_vmtarget);
918 __ jump_to_method_handle_entry(rcx_recv, rdx_temp);
919 }
920 break;
921
922 case _adapter_drop_args:
923 {
924 // 'argslot' is the position of the first argument to nuke
925 __ movl(rax_argslot, rcx_amh_vmargslot);
926 __ lea(rax_argslot, __ argument_address(rax_argslot));
927
928 __ push(rdi); // need a temp
929 // (must do previous push after argslot address is taken)
930
931 // 'stack_move' is number of words to drop
932 Register rdi_stack_move = rdi;
933 __ movl2ptr(rdi_stack_move, rcx_amh_conversion);
934 __ sarptr(rdi_stack_move, CONV_STACK_MOVE_SHIFT);
935 remove_arg_slots(_masm, rdi_stack_move,
936 rax_argslot, rbx_temp, rdx_temp);
937
938 __ pop(rdi); // restore temp
939
940 __ movptr(rcx_recv, rcx_mh_vmtarget);
941 __ jump_to_method_handle_entry(rcx_recv, rdx_temp);
942 }
943 break;
944
945 case _adapter_collect_args:
946 __ unimplemented(entry_name(ek)); // %%% FIXME: NYI
947 break;
948
949 case _adapter_spread_args:
950 // handled completely by optimized cases
951 __ stop("init_AdapterMethodHandle should not issue this");
952 break;
953
954 case _adapter_opt_spread_0:
955 case _adapter_opt_spread_1:
956 case _adapter_opt_spread_more:
957 {
958 // spread an array out into a group of arguments
959 int length_constant = get_ek_adapter_opt_spread_info(ek);
960
961 // find the address of the array argument
962 __ movl(rax_argslot, rcx_amh_vmargslot);
963 __ lea(rax_argslot, __ argument_address(rax_argslot));
964
965 // grab some temps
966 { __ push(rsi); __ push(rdi); }
967 // (preceding pushes must be done after argslot address is taken!)
968 #define UNPUSH_RSI_RDI \
969 { __ pop(rdi); __ pop(rsi); }
970
971 // arx_argslot points both to the array and to the first output arg
972 vmarg = Address(rax_argslot, 0);
973
974 // Get the array value.
975 Register rsi_array = rsi;
976 Register rdx_array_klass = rdx_temp;
977 BasicType elem_type = T_OBJECT;
978 int length_offset = arrayOopDesc::length_offset_in_bytes();
979 int elem0_offset = arrayOopDesc::base_offset_in_bytes(elem_type);
980 __ movptr(rsi_array, vmarg);
981 Label skip_array_check;
982 if (length_constant == 0) {
983 __ testptr(rsi_array, rsi_array);
984 __ jcc(Assembler::zero, skip_array_check);
985 }
986 __ null_check(rsi_array, oopDesc::klass_offset_in_bytes());
987 __ load_klass(rdx_array_klass, rsi_array);
988
989 // Check the array type.
990 Register rbx_klass = rbx_temp;
991 __ movptr(rbx_klass, rcx_amh_argument); // this is a Class object!
992 __ movptr(rbx_klass, Address(rbx_klass, java_lang_Class::klass_offset_in_bytes()));
993
994 Label ok_array_klass, bad_array_klass, bad_array_length;
995 __ check_klass_subtype(rdx_array_klass, rbx_klass, rdi, ok_array_klass);
996 // If we get here, the type check failed!
997 __ jmp(bad_array_klass);
998 __ bind(ok_array_klass);
999
1000 // Check length.
1001 if (length_constant >= 0) {
1002 __ cmpl(Address(rsi_array, length_offset), length_constant);
1003 } else {
1004 Register rbx_vminfo = rbx_temp;
1005 __ movl(rbx_vminfo, rcx_amh_conversion);
1006 assert(CONV_VMINFO_SHIFT == 0, "preshifted");
1007 __ andl(rbx_vminfo, CONV_VMINFO_MASK);
1008 __ cmpl(rbx_vminfo, Address(rsi_array, length_offset));
1009 }
1010 __ jcc(Assembler::notEqual, bad_array_length);
1011
1012 Register rdx_argslot_limit = rdx_temp;
1013
1014 // Array length checks out. Now insert any required stack slots.
1015 if (length_constant == -1) {
1016 // Form a pointer to the end of the affected region.
1017 __ lea(rdx_argslot_limit, Address(rax_argslot, Interpreter::stackElementSize()));
1018 // 'stack_move' is negative number of words to insert
1019 Register rdi_stack_move = rdi;
1020 __ movl2ptr(rdi_stack_move, rcx_amh_conversion);
1021 __ sarptr(rdi_stack_move, CONV_STACK_MOVE_SHIFT);
1022 Register rsi_temp = rsi_array; // spill this
1023 insert_arg_slots(_masm, rdi_stack_move, -1,
1024 rax_argslot, rbx_temp, rsi_temp);
1025 // reload the array (since rsi was killed)
1026 __ movptr(rsi_array, vmarg);
1027 } else if (length_constant > 1) {
1028 int arg_mask = 0;
1029 int new_slots = (length_constant - 1);
1030 for (int i = 0; i < new_slots; i++) {
1031 arg_mask <<= 1;
1032 arg_mask |= _INSERT_REF_MASK;
1033 }
1034 insert_arg_slots(_masm, new_slots * stack_move_unit(), arg_mask,
1035 rax_argslot, rbx_temp, rdx_temp);
1036 } else if (length_constant == 1) {
1037 // no stack resizing required
1038 } else if (length_constant == 0) {
1039 remove_arg_slots(_masm, -stack_move_unit(),
1040 rax_argslot, rbx_temp, rdx_temp);
1041 }
1042
1043 // Copy from the array to the new slots.
1044 // Note: Stack change code preserves integrity of rax_argslot pointer.
1045 // So even after slot insertions, rax_argslot still points to first argument.
1046 if (length_constant == -1) {
1047 // [rax_argslot, rdx_argslot_limit) is the area we are inserting into.
1048 Register rsi_source = rsi_array;
1049 __ lea(rsi_source, Address(rsi_array, elem0_offset));
1050 Label loop;
1051 __ bind(loop);
1052 __ movptr(rbx_temp, Address(rsi_source, 0));
1053 __ movptr(Address(rax_argslot, 0), rbx_temp);
1054 __ addptr(rsi_source, type2aelembytes(elem_type));
1055 __ addptr(rax_argslot, Interpreter::stackElementSize());
1056 __ cmpptr(rax_argslot, rdx_argslot_limit);
1057 __ jccb(Assembler::less, loop);
1058 } else if (length_constant == 0) {
1059 __ bind(skip_array_check);
1060 // nothing to copy
1061 } else {
1062 int elem_offset = elem0_offset;
1063 int slot_offset = 0;
1064 for (int index = 0; index < length_constant; index++) {
1065 __ movptr(rbx_temp, Address(rsi_array, elem_offset));
1066 __ movptr(Address(rax_argslot, slot_offset), rbx_temp);
1067 elem_offset += type2aelembytes(elem_type);
1068 slot_offset += Interpreter::stackElementSize();
1069 }
1070 }
1071
1072 // Arguments are spread. Move to next method handle.
1073 UNPUSH_RSI_RDI;
1074 __ movptr(rcx_recv, rcx_mh_vmtarget);
1075 __ jump_to_method_handle_entry(rcx_recv, rdx_temp);
1076
1077 __ bind(bad_array_klass);
1078 UNPUSH_RSI_RDI;
1079 __ pushptr(Address(rdx_array_klass, java_mirror_offset)); // required type
1080 __ pushptr(vmarg); // bad array
1081 __ push((int)Bytecodes::_aaload); // who is complaining?
1082 __ jump(ExternalAddress(from_interpreted_entry(_raise_exception)));
1083
1084 __ bind(bad_array_length);
1085 UNPUSH_RSI_RDI;
1086 __ push(rcx_recv); // AMH requiring a certain length
1087 __ pushptr(vmarg); // bad array
1088 __ push((int)Bytecodes::_arraylength); // who is complaining?
1089 __ jump(ExternalAddress(from_interpreted_entry(_raise_exception)));
1090
1091 #undef UNPUSH_RSI_RDI
1092 }
1093 break;
1094
1095 case _adapter_flyby:
1096 case _adapter_ricochet:
1097 __ unimplemented(entry_name(ek)); // %%% FIXME: NYI
1098 break;
1099
1100 default: ShouldNotReachHere();
1101 }
1102 __ hlt();
1103
1104 address me_cookie = MethodHandleEntry::start_compiled_entry(_masm, interp_entry);
1105 __ unimplemented(entry_name(ek)); // %%% FIXME: NYI
1106
1107 init_entry(ek, MethodHandleEntry::finish_compiled_entry(_masm, me_cookie));
1108 }