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, Register temp3_reg) {
131 assert(temp3_reg == noreg, "temp3 not required");
132 assert_different_registers(rax_argslot, rbx_temp, rdx_temp,
133 (!arg_slots.is_register() ? rsp : arg_slots.as_register()));
134
135 #ifdef ASSERT
136 verify_argslot(_masm, rax_argslot, "insertion point must fall within current frame");
137 if (arg_slots.is_register()) {
138 Label L_ok, L_bad;
139 __ cmpptr(arg_slots.as_register(), (int32_t) NULL_WORD);
140 __ jccb(Assembler::greater, L_bad);
141 __ testl(arg_slots.as_register(), -stack_move_unit() - 1);
142 __ jccb(Assembler::zero, L_ok);
143 __ bind(L_bad);
144 __ stop("assert arg_slots <= 0 and clear low bits");
145 __ bind(L_ok);
146 } else {
147 assert(arg_slots.as_constant() <= 0, "");
148 assert(arg_slots.as_constant() % -stack_move_unit() == 0, "");
149 }
150 #endif //ASSERT
151
152 #ifdef _LP64
153 if (arg_slots.is_register()) {
154 // clean high bits of stack motion register (was loaded as an int)
155 __ movslq(arg_slots.as_register(), arg_slots.as_register());
156 }
157 #endif
158
159 // Make space on the stack for the inserted argument(s).
160 // Then pull down everything shallower than rax_argslot.
161 // The stacked return address gets pulled down with everything else.
162 // That is, copy [rsp, argslot) downward by -size words. In pseudo-code:
163 // rsp -= size;
164 // for (rdx = rsp + size; rdx < argslot; rdx++)
165 // rdx[-size] = rdx[0]
166 // argslot -= size;
167 __ mov(rdx_temp, rsp); // source pointer for copy
168 __ lea(rsp, Address(rsp, arg_slots, Address::times_ptr));
169 {
170 Label loop;
171 __ bind(loop);
172 // pull one word down each time through the loop
173 __ movptr(rbx_temp, Address(rdx_temp, 0));
174 __ movptr(Address(rdx_temp, arg_slots, Address::times_ptr), rbx_temp);
175 __ addptr(rdx_temp, wordSize);
176 __ cmpptr(rdx_temp, rax_argslot);
177 __ jccb(Assembler::less, loop);
178 }
179
180 // Now move the argslot down, to point to the opened-up space.
181 __ lea(rax_argslot, Address(rax_argslot, arg_slots, Address::times_ptr));
182 }
183
184 // Helper to remove argument slots from the stack.
185 // arg_slots must be a multiple of stack_move_unit() and >= 0
186 void MethodHandles::remove_arg_slots(MacroAssembler* _masm,
187 RegisterOrConstant arg_slots,
188 Register rax_argslot,
189 Register rbx_temp, Register rdx_temp, Register temp3_reg) {
190 assert(temp3_reg == noreg, "temp3 not required");
191 assert_different_registers(rax_argslot, rbx_temp, rdx_temp,
192 (!arg_slots.is_register() ? rsp : arg_slots.as_register()));
193
194 #ifdef ASSERT
195 // Verify that [argslot..argslot+size) lies within (rsp, rbp).
196 __ lea(rbx_temp, Address(rax_argslot, arg_slots, Address::times_ptr));
197 verify_argslot(_masm, rbx_temp, "deleted argument(s) must fall within current frame");
198 if (arg_slots.is_register()) {
199 Label L_ok, L_bad;
200 __ cmpptr(arg_slots.as_register(), (int32_t) NULL_WORD);
201 __ jccb(Assembler::less, L_bad);
202 __ testl(arg_slots.as_register(), -stack_move_unit() - 1);
203 __ jccb(Assembler::zero, L_ok);
204 __ bind(L_bad);
205 __ stop("assert arg_slots >= 0 and clear low bits");
206 __ bind(L_ok);
207 } else {
208 assert(arg_slots.as_constant() >= 0, "");
209 assert(arg_slots.as_constant() % -stack_move_unit() == 0, "");
210 }
211 #endif //ASSERT
212
213 #ifdef _LP64
214 if (false) { // not needed, since register is positive
215 // clean high bits of stack motion register (was loaded as an int)
216 if (arg_slots.is_register())
217 __ movslq(arg_slots.as_register(), arg_slots.as_register());
218 }
219 #endif
220
221 // Pull up everything shallower than rax_argslot.
222 // Then remove the excess space on the stack.
223 // The stacked return address gets pulled up with everything else.
224 // That is, copy [rsp, argslot) upward by size words. In pseudo-code:
225 // for (rdx = argslot-1; rdx >= rsp; --rdx)
226 // rdx[size] = rdx[0]
227 // argslot += size;
228 // rsp += size;
229 __ lea(rdx_temp, Address(rax_argslot, -wordSize)); // source pointer for copy
230 {
231 Label loop;
232 __ bind(loop);
233 // pull one word up each time through the loop
234 __ movptr(rbx_temp, Address(rdx_temp, 0));
235 __ movptr(Address(rdx_temp, arg_slots, Address::times_ptr), rbx_temp);
236 __ addptr(rdx_temp, -wordSize);
237 __ cmpptr(rdx_temp, rsp);
238 __ jccb(Assembler::greaterEqual, loop);
239 }
240
241 // Now move the argslot up, to point to the just-copied block.
242 __ lea(rsp, Address(rsp, arg_slots, Address::times_ptr));
243 // And adjust the argslot address to point at the deletion point.
244 __ lea(rax_argslot, Address(rax_argslot, arg_slots, Address::times_ptr));
245 }
246
247 #ifndef PRODUCT
248 extern "C" void print_method_handle(oop mh);
249 void trace_method_handle_stub(const char* adaptername,
250 oop mh,
251 intptr_t* entry_sp,
252 intptr_t* saved_sp,
253 intptr_t* saved_bp) {
254 // called as a leaf from native code: do not block the JVM!
255 intptr_t* last_sp = (intptr_t*) saved_bp[frame::interpreter_frame_last_sp_offset];
256 intptr_t* base_sp = (intptr_t*) saved_bp[frame::interpreter_frame_monitor_block_top_offset];
257 printf("MH %s mh="INTPTR_FORMAT" sp=("INTPTR_FORMAT"+"INTX_FORMAT") stack_size="INTX_FORMAT" bp="INTPTR_FORMAT"\n",
258 adaptername, (intptr_t)mh, (intptr_t)entry_sp, (intptr_t)(saved_sp - entry_sp), (intptr_t)(base_sp - last_sp), (intptr_t)saved_bp);
259 if (last_sp != saved_sp)
260 printf("*** last_sp="INTPTR_FORMAT"\n", (intptr_t)last_sp);
261 if (Verbose) print_method_handle(mh);
262 }
263 #endif //PRODUCT
264
265 // Generate an "entry" field for a method handle.
266 // This determines how the method handle will respond to calls.
267 void MethodHandles::generate_method_handle_stub(MacroAssembler* _masm, MethodHandles::EntryKind ek) {
268 // Here is the register state during an interpreted call,
269 // as set up by generate_method_handle_interpreter_entry():
270 // - rbx: garbage temp (was MethodHandle.invoke methodOop, unused)
271 // - rcx: receiver method handle
272 // - rax: method handle type (only used by the check_mtype entry point)
273 // - rsi/r13: sender SP (must preserve; see prepare_to_jump_from_interpreted)
274 // - rdx: garbage temp, can blow away
275
276 Register rcx_recv = rcx;
277 Register rax_argslot = rax;
278 Register rbx_temp = rbx;
279 Register rdx_temp = rdx;
280
281 // This guy is set up by prepare_to_jump_from_interpreted (from interpreted calls)
282 // and gen_c2i_adapter (from compiled calls):
283 Register saved_last_sp = LP64_ONLY(r13) NOT_LP64(rsi);
284
285 guarantee(java_dyn_MethodHandle::vmentry_offset_in_bytes() != 0, "must have offsets");
286
287 // some handy addresses
288 Address rbx_method_fie( rbx, methodOopDesc::from_interpreted_offset() );
289
290 Address rcx_mh_vmtarget( rcx_recv, java_dyn_MethodHandle::vmtarget_offset_in_bytes() );
291 Address rcx_dmh_vmindex( rcx_recv, sun_dyn_DirectMethodHandle::vmindex_offset_in_bytes() );
292
293 Address rcx_bmh_vmargslot( rcx_recv, sun_dyn_BoundMethodHandle::vmargslot_offset_in_bytes() );
294 Address rcx_bmh_argument( rcx_recv, sun_dyn_BoundMethodHandle::argument_offset_in_bytes() );
295
296 Address rcx_amh_vmargslot( rcx_recv, sun_dyn_AdapterMethodHandle::vmargslot_offset_in_bytes() );
297 Address rcx_amh_argument( rcx_recv, sun_dyn_AdapterMethodHandle::argument_offset_in_bytes() );
298 Address rcx_amh_conversion( rcx_recv, sun_dyn_AdapterMethodHandle::conversion_offset_in_bytes() );
299 Address vmarg; // __ argument_address(vmargslot)
300
301 const int java_mirror_offset = klassOopDesc::klass_part_offset_in_bytes() + Klass::java_mirror_offset_in_bytes();
302
303 if (have_entry(ek)) {
304 __ nop(); // empty stubs make SG sick
305 return;
306 }
307
308 address interp_entry = __ pc();
309 if (UseCompressedOops) __ unimplemented("UseCompressedOops");
310
311 #ifndef PRODUCT
312 if (TraceMethodHandles) {
313 __ push(rax); __ push(rbx); __ push(rcx); __ push(rdx); __ push(rsi); __ push(rdi);
314 __ lea(rax, Address(rsp, wordSize*6)); // entry_sp
315 // arguments:
316 __ push(rbp); // interpreter frame pointer
317 __ push(rsi); // saved_sp
318 __ push(rax); // entry_sp
319 __ push(rcx); // mh
320 __ push(rcx);
321 __ movptr(Address(rsp, 0), (intptr_t)entry_name(ek));
322 __ call_VM_leaf(CAST_FROM_FN_PTR(address, trace_method_handle_stub), 5);
323 __ pop(rdi); __ pop(rsi); __ pop(rdx); __ pop(rcx); __ pop(rbx); __ pop(rax);
324 }
325 #endif //PRODUCT
326
327 switch ((int) ek) {
328 case _raise_exception:
329 {
330 // Not a real MH entry, but rather shared code for raising an exception.
331 // Extra local arguments are pushed on stack, as required type at TOS+8,
332 // failing object (or NULL) at TOS+4, failing bytecode type at TOS.
333 // Beyond those local arguments are the PC, of course.
334 Register rdx_code = rdx_temp;
335 Register rcx_fail = rcx_recv;
336 Register rax_want = rax_argslot;
337 Register rdi_pc = rdi;
338 __ pop(rdx_code); // TOS+0
339 __ pop(rcx_fail); // TOS+4
340 __ pop(rax_want); // TOS+8
341 __ pop(rdi_pc); // caller PC
342
343 __ mov(rsp, rsi); // cut the stack back to where the caller started
344
345 // Repush the arguments as if coming from the interpreter.
346 __ push(rdx_code);
347 __ push(rcx_fail);
348 __ push(rax_want);
349
350 Register rbx_method = rbx_temp;
351 Label no_method;
352 // FIXME: fill in _raise_exception_method with a suitable sun.dyn method
353 __ movptr(rbx_method, ExternalAddress((address) &_raise_exception_method));
354 __ testptr(rbx_method, rbx_method);
355 __ jccb(Assembler::zero, no_method);
356 int jobject_oop_offset = 0;
357 __ movptr(rbx_method, Address(rbx_method, jobject_oop_offset)); // dereference the jobject
358 __ testptr(rbx_method, rbx_method);
359 __ jccb(Assembler::zero, no_method);
360 __ verify_oop(rbx_method);
361 __ push(rdi_pc); // and restore caller PC
362 __ jmp(rbx_method_fie);
363
364 // If we get here, the Java runtime did not do its job of creating the exception.
365 // Do something that is at least causes a valid throw from the interpreter.
366 __ bind(no_method);
367 __ pop(rax_want);
368 __ pop(rcx_fail);
369 __ push(rax_want);
370 __ push(rcx_fail);
371 __ jump(ExternalAddress(Interpreter::throw_WrongMethodType_entry()));
372 }
373 break;
374
375 case _invokestatic_mh:
376 case _invokespecial_mh:
377 {
378 Register rbx_method = rbx_temp;
379 __ movptr(rbx_method, rcx_mh_vmtarget); // target is a methodOop
380 __ verify_oop(rbx_method);
381 // same as TemplateTable::invokestatic or invokespecial,
382 // minus the CP setup and profiling:
383 if (ek == _invokespecial_mh) {
384 // Must load & check the first argument before entering the target method.
385 __ load_method_handle_vmslots(rax_argslot, rcx_recv, rdx_temp);
386 __ movptr(rcx_recv, __ argument_address(rax_argslot, -1));
387 __ null_check(rcx_recv);
388 __ verify_oop(rcx_recv);
389 }
390 __ jmp(rbx_method_fie);
391 }
392 break;
393
394 case _invokevirtual_mh:
395 {
396 // same as TemplateTable::invokevirtual,
397 // minus the CP setup and profiling:
398
399 // pick out the vtable index and receiver offset from the MH,
400 // and then we can discard it:
401 __ load_method_handle_vmslots(rax_argslot, rcx_recv, rdx_temp);
402 Register rbx_index = rbx_temp;
403 __ movl(rbx_index, rcx_dmh_vmindex);
404 // Note: The verifier allows us to ignore rcx_mh_vmtarget.
405 __ movptr(rcx_recv, __ argument_address(rax_argslot, -1));
406 __ null_check(rcx_recv, oopDesc::klass_offset_in_bytes());
407
408 // get receiver klass
409 Register rax_klass = rax_argslot;
410 __ load_klass(rax_klass, rcx_recv);
411 __ verify_oop(rax_klass);
412
413 // get target methodOop & entry point
414 const int base = instanceKlass::vtable_start_offset() * wordSize;
415 assert(vtableEntry::size() * wordSize == wordSize, "adjust the scaling in the code below");
416 Address vtable_entry_addr(rax_klass,
417 rbx_index, Address::times_ptr,
418 base + vtableEntry::method_offset_in_bytes());
419 Register rbx_method = rbx_temp;
420 __ movptr(rbx_method, vtable_entry_addr);
421
422 __ verify_oop(rbx_method);
423 __ jmp(rbx_method_fie);
424 }
425 break;
426
427 case _invokeinterface_mh:
428 {
429 // same as TemplateTable::invokeinterface,
430 // minus the CP setup and profiling:
431
432 // pick out the interface and itable index from the MH.
433 __ load_method_handle_vmslots(rax_argslot, rcx_recv, rdx_temp);
434 Register rdx_intf = rdx_temp;
435 Register rbx_index = rbx_temp;
436 __ movptr(rdx_intf, rcx_mh_vmtarget);
437 __ movl(rbx_index, rcx_dmh_vmindex);
438 __ movptr(rcx_recv, __ argument_address(rax_argslot, -1));
439 __ null_check(rcx_recv, oopDesc::klass_offset_in_bytes());
440
441 // get receiver klass
442 Register rax_klass = rax_argslot;
443 __ load_klass(rax_klass, rcx_recv);
444 __ verify_oop(rax_klass);
445
446 Register rdi_temp = rdi;
447 Register rbx_method = rbx_index;
448
449 // get interface klass
450 Label no_such_interface;
451 __ verify_oop(rdx_intf);
452 __ lookup_interface_method(rax_klass, rdx_intf,
453 // note: next two args must be the same:
454 rbx_index, rbx_method,
455 rdi_temp,
456 no_such_interface);
457
458 __ verify_oop(rbx_method);
459 __ jmp(rbx_method_fie);
460 __ hlt();
461
462 __ bind(no_such_interface);
463 // Throw an exception.
464 // For historical reasons, it will be IncompatibleClassChangeError.
465 __ pushptr(Address(rdx_intf, java_mirror_offset)); // required interface
466 __ push(rcx_recv); // bad receiver
467 __ push((int)Bytecodes::_invokeinterface); // who is complaining?
468 __ jump(ExternalAddress(from_interpreted_entry(_raise_exception)));
469 }
470 break;
471
472 case _bound_ref_mh:
473 case _bound_int_mh:
474 case _bound_long_mh:
475 case _bound_ref_direct_mh:
476 case _bound_int_direct_mh:
477 case _bound_long_direct_mh:
478 {
479 bool direct_to_method = (ek >= _bound_ref_direct_mh);
480 BasicType arg_type = T_ILLEGAL;
481 int arg_mask = _INSERT_NO_MASK;
482 int arg_slots = -1;
483 get_ek_bound_mh_info(ek, arg_type, arg_mask, arg_slots);
484
485 // make room for the new argument:
486 __ movl(rax_argslot, rcx_bmh_vmargslot);
487 __ lea(rax_argslot, __ argument_address(rax_argslot));
488 insert_arg_slots(_masm, arg_slots * stack_move_unit(), arg_mask,
489 rax_argslot, rbx_temp, rdx_temp);
490
491 // store bound argument into the new stack slot:
492 __ movptr(rbx_temp, rcx_bmh_argument);
493 Address prim_value_addr(rbx_temp, java_lang_boxing_object::value_offset_in_bytes(arg_type));
494 if (arg_type == T_OBJECT) {
495 __ movptr(Address(rax_argslot, 0), rbx_temp);
496 } else {
497 __ load_sized_value(rdx_temp, prim_value_addr,
498 type2aelembytes(arg_type), is_signed_subword_type(arg_type));
499 __ movptr(Address(rax_argslot, 0), rdx_temp);
500 #ifndef _LP64
501 if (arg_slots == 2) {
502 __ movl(rdx_temp, prim_value_addr.plus_disp(wordSize));
503 __ movl(Address(rax_argslot, Interpreter::stackElementSize()), rdx_temp);
504 }
505 #endif //_LP64
506 }
507
508 if (direct_to_method) {
509 Register rbx_method = rbx_temp;
510 __ movptr(rbx_method, rcx_mh_vmtarget);
511 __ verify_oop(rbx_method);
512 __ jmp(rbx_method_fie);
513 } else {
514 __ movptr(rcx_recv, rcx_mh_vmtarget);
515 __ verify_oop(rcx_recv);
516 __ jump_to_method_handle_entry(rcx_recv, rdx_temp);
517 }
518 }
519 break;
520
521 case _adapter_retype_only:
522 case _adapter_retype_raw:
523 // immediately jump to the next MH layer:
524 __ movptr(rcx_recv, rcx_mh_vmtarget);
525 __ verify_oop(rcx_recv);
526 __ jump_to_method_handle_entry(rcx_recv, rdx_temp);
527 // This is OK when all parameter types widen.
528 // It is also OK when a return type narrows.
529 break;
530
531 case _adapter_check_cast:
532 {
533 // temps:
534 Register rbx_klass = rbx_temp; // interesting AMH data
535
536 // check a reference argument before jumping to the next layer of MH:
537 __ movl(rax_argslot, rcx_amh_vmargslot);
538 vmarg = __ argument_address(rax_argslot);
539
540 // What class are we casting to?
541 __ movptr(rbx_klass, rcx_amh_argument); // this is a Class object!
542 __ movptr(rbx_klass, Address(rbx_klass, java_lang_Class::klass_offset_in_bytes()));
543
544 Label done;
545 __ movptr(rdx_temp, vmarg);
546 __ testptr(rdx_temp, rdx_temp);
547 __ jccb(Assembler::zero, done); // no cast if null
548 __ load_klass(rdx_temp, rdx_temp);
549
550 // live at this point:
551 // - rbx_klass: klass required by the target method
552 // - rdx_temp: argument klass to test
553 // - rcx_recv: adapter method handle
554 __ check_klass_subtype(rdx_temp, rbx_klass, rax_argslot, done);
555
556 // If we get here, the type check failed!
557 // Call the wrong_method_type stub, passing the failing argument type in rax.
558 Register rax_mtype = rax_argslot;
559 __ movl(rax_argslot, rcx_amh_vmargslot); // reload argslot field
560 __ movptr(rdx_temp, vmarg);
561
562 __ pushptr(rcx_amh_argument); // required class
563 __ push(rdx_temp); // bad object
564 __ push((int)Bytecodes::_checkcast); // who is complaining?
565 __ jump(ExternalAddress(from_interpreted_entry(_raise_exception)));
566
567 __ bind(done);
568 // get the new MH:
569 __ movptr(rcx_recv, rcx_mh_vmtarget);
570 __ jump_to_method_handle_entry(rcx_recv, rdx_temp);
571 }
572 break;
573
574 case _adapter_prim_to_prim:
575 case _adapter_ref_to_prim:
576 // handled completely by optimized cases
577 __ stop("init_AdapterMethodHandle should not issue this");
578 break;
579
580 case _adapter_opt_i2i: // optimized subcase of adapt_prim_to_prim
581 //case _adapter_opt_f2i: // optimized subcase of adapt_prim_to_prim
582 case _adapter_opt_l2i: // optimized subcase of adapt_prim_to_prim
583 case _adapter_opt_unboxi: // optimized subcase of adapt_ref_to_prim
584 {
585 // perform an in-place conversion to int or an int subword
586 __ movl(rax_argslot, rcx_amh_vmargslot);
587 vmarg = __ argument_address(rax_argslot);
588
589 switch (ek) {
590 case _adapter_opt_i2i:
591 __ movl(rdx_temp, vmarg);
592 break;
593 case _adapter_opt_l2i:
594 {
595 // just delete the extra slot; on a little-endian machine we keep the first
596 __ lea(rax_argslot, __ argument_address(rax_argslot, 1));
597 remove_arg_slots(_masm, -stack_move_unit(),
598 rax_argslot, rbx_temp, rdx_temp);
599 vmarg = Address(rax_argslot, -Interpreter::stackElementSize());
600 __ movl(rdx_temp, vmarg);
601 }
602 break;
603 case _adapter_opt_unboxi:
604 {
605 // Load the value up from the heap.
606 __ movptr(rdx_temp, vmarg);
607 int value_offset = java_lang_boxing_object::value_offset_in_bytes(T_INT);
608 #ifdef ASSERT
609 for (int bt = T_BOOLEAN; bt < T_INT; bt++) {
610 if (is_subword_type(BasicType(bt)))
611 assert(value_offset == java_lang_boxing_object::value_offset_in_bytes(BasicType(bt)), "");
612 }
613 #endif
614 __ null_check(rdx_temp, value_offset);
615 __ movl(rdx_temp, Address(rdx_temp, value_offset));
616 // We load this as a word. Because we are little-endian,
617 // the low bits will be correct, but the high bits may need cleaning.
618 // The vminfo will guide us to clean those bits.
619 }
620 break;
621 default:
622 ShouldNotReachHere();
623 }
624
625 // Do the requested conversion and store the value.
626 Register rbx_vminfo = rbx_temp;
627 __ movl(rbx_vminfo, rcx_amh_conversion);
628 assert(CONV_VMINFO_SHIFT == 0, "preshifted");
629
630 // get the new MH:
631 __ movptr(rcx_recv, rcx_mh_vmtarget);
632 // (now we are done with the old MH)
633
634 // original 32-bit vmdata word must be of this form:
635 // | MBZ:6 | signBitCount:8 | srcDstTypes:8 | conversionOp:8 |
636 __ xchgptr(rcx, rbx_vminfo); // free rcx for shifts
637 __ shll(rdx_temp /*, rcx*/);
638 Label zero_extend, done;
639 __ testl(rcx, CONV_VMINFO_SIGN_FLAG);
640 __ jccb(Assembler::zero, zero_extend);
641
642 // this path is taken for int->byte, int->short
643 __ sarl(rdx_temp /*, rcx*/);
644 __ jmpb(done);
645
646 __ bind(zero_extend);
647 // this is taken for int->char
648 __ shrl(rdx_temp /*, rcx*/);
649
650 __ bind(done);
651 __ movl(vmarg, rdx_temp); // Store the value.
652 __ xchgptr(rcx, rbx_vminfo); // restore rcx_recv
653
654 __ jump_to_method_handle_entry(rcx_recv, rdx_temp);
655 }
656 break;
657
658 case _adapter_opt_i2l: // optimized subcase of adapt_prim_to_prim
659 case _adapter_opt_unboxl: // optimized subcase of adapt_ref_to_prim
660 {
661 // perform an in-place int-to-long or ref-to-long conversion
662 __ movl(rax_argslot, rcx_amh_vmargslot);
663
664 // on a little-endian machine we keep the first slot and add another after
665 __ lea(rax_argslot, __ argument_address(rax_argslot, 1));
666 insert_arg_slots(_masm, stack_move_unit(), _INSERT_INT_MASK,
667 rax_argslot, rbx_temp, rdx_temp);
668 Address vmarg1(rax_argslot, -Interpreter::stackElementSize());
669 Address vmarg2 = vmarg1.plus_disp(Interpreter::stackElementSize());
670
671 switch (ek) {
672 case _adapter_opt_i2l:
673 {
674 #ifdef _LP64
675 __ movslq(rdx_temp, vmarg1); // Load sign-extended
676 __ movq(vmarg1, rdx_temp); // Store into first slot
677 #else
678 __ movl(rdx_temp, vmarg1);
679 __ sarl(rdx_temp, BitsPerInt - 1); // __ extend_sign()
680 __ movl(vmarg2, rdx_temp); // store second word
681 #endif
682 }
683 break;
684 case _adapter_opt_unboxl:
685 {
686 // Load the value up from the heap.
687 __ movptr(rdx_temp, vmarg1);
688 int value_offset = java_lang_boxing_object::value_offset_in_bytes(T_LONG);
689 assert(value_offset == java_lang_boxing_object::value_offset_in_bytes(T_DOUBLE), "");
690 __ null_check(rdx_temp, value_offset);
691 #ifdef _LP64
692 __ movq(rbx_temp, Address(rdx_temp, value_offset));
693 __ movq(vmarg1, rbx_temp);
694 #else
695 __ movl(rbx_temp, Address(rdx_temp, value_offset + 0*BytesPerInt));
696 __ movl(rdx_temp, Address(rdx_temp, value_offset + 1*BytesPerInt));
697 __ movl(vmarg1, rbx_temp);
698 __ movl(vmarg2, rdx_temp);
699 #endif
700 }
701 break;
702 default:
703 ShouldNotReachHere();
704 }
705
706 __ movptr(rcx_recv, rcx_mh_vmtarget);
707 __ jump_to_method_handle_entry(rcx_recv, rdx_temp);
708 }
709 break;
710
711 case _adapter_opt_f2d: // optimized subcase of adapt_prim_to_prim
712 case _adapter_opt_d2f: // optimized subcase of adapt_prim_to_prim
713 {
714 // perform an in-place floating primitive conversion
715 __ movl(rax_argslot, rcx_amh_vmargslot);
716 __ lea(rax_argslot, __ argument_address(rax_argslot, 1));
717 if (ek == _adapter_opt_f2d) {
718 insert_arg_slots(_masm, stack_move_unit(), _INSERT_INT_MASK,
719 rax_argslot, rbx_temp, rdx_temp);
720 }
721 Address vmarg(rax_argslot, -Interpreter::stackElementSize());
722
723 #ifdef _LP64
724 if (ek == _adapter_opt_f2d) {
725 __ movflt(xmm0, vmarg);
726 __ cvtss2sd(xmm0, xmm0);
727 __ movdbl(vmarg, xmm0);
728 } else {
729 __ movdbl(xmm0, vmarg);
730 __ cvtsd2ss(xmm0, xmm0);
731 __ movflt(vmarg, xmm0);
732 }
733 #else //_LP64
734 if (ek == _adapter_opt_f2d) {
735 __ fld_s(vmarg); // load float to ST0
736 __ fstp_s(vmarg); // store single
737 } else {
738 __ fld_d(vmarg); // load double to ST0
739 __ fstp_s(vmarg); // store single
740 }
741 #endif //_LP64
742
743 if (ek == _adapter_opt_d2f) {
744 remove_arg_slots(_masm, -stack_move_unit(),
745 rax_argslot, rbx_temp, rdx_temp);
746 }
747
748 __ movptr(rcx_recv, rcx_mh_vmtarget);
749 __ jump_to_method_handle_entry(rcx_recv, rdx_temp);
750 }
751 break;
752
753 case _adapter_prim_to_ref:
754 __ unimplemented(entry_name(ek)); // %%% FIXME: NYI
755 break;
756
757 case _adapter_swap_args:
758 case _adapter_rot_args:
759 // handled completely by optimized cases
760 __ stop("init_AdapterMethodHandle should not issue this");
761 break;
762
763 case _adapter_opt_swap_1:
764 case _adapter_opt_swap_2:
765 case _adapter_opt_rot_1_up:
766 case _adapter_opt_rot_1_down:
767 case _adapter_opt_rot_2_up:
768 case _adapter_opt_rot_2_down:
769 {
770 int swap_bytes = 0, rotate = 0;
771 get_ek_adapter_opt_swap_rot_info(ek, swap_bytes, rotate);
772
773 // 'argslot' is the position of the first argument to swap
774 __ movl(rax_argslot, rcx_amh_vmargslot);
775 __ lea(rax_argslot, __ argument_address(rax_argslot));
776
777 // 'vminfo' is the second
778 Register rbx_destslot = rbx_temp;
779 __ movl(rbx_destslot, rcx_amh_conversion);
780 assert(CONV_VMINFO_SHIFT == 0, "preshifted");
781 __ andl(rbx_destslot, CONV_VMINFO_MASK);
782 __ lea(rbx_destslot, __ argument_address(rbx_destslot));
783 DEBUG_ONLY(verify_argslot(_masm, rbx_destslot, "swap point must fall within current frame"));
784
785 if (!rotate) {
786 for (int i = 0; i < swap_bytes; i += wordSize) {
787 __ movptr(rdx_temp, Address(rax_argslot , i));
788 __ push(rdx_temp);
789 __ movptr(rdx_temp, Address(rbx_destslot, i));
790 __ movptr(Address(rax_argslot, i), rdx_temp);
791 __ pop(rdx_temp);
792 __ movptr(Address(rbx_destslot, i), rdx_temp);
793 }
794 } else {
795 // push the first chunk, which is going to get overwritten
796 for (int i = swap_bytes; (i -= wordSize) >= 0; ) {
797 __ movptr(rdx_temp, Address(rax_argslot, i));
798 __ push(rdx_temp);
799 }
800
801 if (rotate > 0) {
802 // rotate upward
803 __ subptr(rax_argslot, swap_bytes);
804 #ifdef ASSERT
805 {
806 // Verify that argslot > destslot, by at least swap_bytes.
807 Label L_ok;
808 __ cmpptr(rax_argslot, rbx_destslot);
809 __ jccb(Assembler::aboveEqual, L_ok);
810 __ stop("source must be above destination (upward rotation)");
811 __ bind(L_ok);
812 }
813 #endif
814 // work argslot down to destslot, copying contiguous data upwards
815 // pseudo-code:
816 // rax = src_addr - swap_bytes
817 // rbx = dest_addr
818 // while (rax >= rbx) *(rax + swap_bytes) = *(rax + 0), rax--;
819 Label loop;
820 __ bind(loop);
821 __ movptr(rdx_temp, Address(rax_argslot, 0));
822 __ movptr(Address(rax_argslot, swap_bytes), rdx_temp);
823 __ addptr(rax_argslot, -wordSize);
824 __ cmpptr(rax_argslot, rbx_destslot);
825 __ jccb(Assembler::aboveEqual, loop);
826 } else {
827 __ addptr(rax_argslot, swap_bytes);
828 #ifdef ASSERT
829 {
830 // Verify that argslot < destslot, by at least swap_bytes.
831 Label L_ok;
832 __ cmpptr(rax_argslot, rbx_destslot);
833 __ jccb(Assembler::belowEqual, L_ok);
834 __ stop("source must be below destination (downward rotation)");
835 __ bind(L_ok);
836 }
837 #endif
838 // work argslot up to destslot, copying contiguous data downwards
839 // pseudo-code:
840 // rax = src_addr + swap_bytes
841 // rbx = dest_addr
842 // while (rax <= rbx) *(rax - swap_bytes) = *(rax + 0), rax++;
843 Label loop;
844 __ bind(loop);
845 __ movptr(rdx_temp, Address(rax_argslot, 0));
846 __ movptr(Address(rax_argslot, -swap_bytes), rdx_temp);
847 __ addptr(rax_argslot, wordSize);
848 __ cmpptr(rax_argslot, rbx_destslot);
849 __ jccb(Assembler::belowEqual, loop);
850 }
851
852 // pop the original first chunk into the destination slot, now free
853 for (int i = 0; i < swap_bytes; i += wordSize) {
854 __ pop(rdx_temp);
855 __ movptr(Address(rbx_destslot, i), rdx_temp);
856 }
857 }
858
859 __ movptr(rcx_recv, rcx_mh_vmtarget);
860 __ jump_to_method_handle_entry(rcx_recv, rdx_temp);
861 }
862 break;
863
864 case _adapter_dup_args:
865 {
866 // 'argslot' is the position of the first argument to duplicate
867 __ movl(rax_argslot, rcx_amh_vmargslot);
868 __ lea(rax_argslot, __ argument_address(rax_argslot));
869
870 // 'stack_move' is negative number of words to duplicate
871 Register rdx_stack_move = rdx_temp;
872 __ movl2ptr(rdx_stack_move, rcx_amh_conversion);
873 __ sarptr(rdx_stack_move, CONV_STACK_MOVE_SHIFT);
874
875 int argslot0_num = 0;
876 Address argslot0 = __ argument_address(RegisterOrConstant(argslot0_num));
877 assert(argslot0.base() == rsp, "");
878 int pre_arg_size = argslot0.disp();
879 assert(pre_arg_size % wordSize == 0, "");
880 assert(pre_arg_size > 0, "must include PC");
881
882 // remember the old rsp+1 (argslot[0])
883 Register rbx_oldarg = rbx_temp;
884 __ lea(rbx_oldarg, argslot0);
885
886 // move rsp down to make room for dups
887 __ lea(rsp, Address(rsp, rdx_stack_move, Address::times_ptr));
888
889 // compute the new rsp+1 (argslot[0])
890 Register rdx_newarg = rdx_temp;
891 __ lea(rdx_newarg, argslot0);
892
893 __ push(rdi); // need a temp
894 // (preceding push must be done after arg addresses are taken!)
895
896 // pull down the pre_arg_size data (PC)
897 for (int i = -pre_arg_size; i < 0; i += wordSize) {
898 __ movptr(rdi, Address(rbx_oldarg, i));
899 __ movptr(Address(rdx_newarg, i), rdi);
900 }
901
902 // copy from rax_argslot[0...] down to new_rsp[1...]
903 // pseudo-code:
904 // rbx = old_rsp+1
905 // rdx = new_rsp+1
906 // rax = argslot
907 // while (rdx < rbx) *rdx++ = *rax++
908 Label loop;
909 __ bind(loop);
910 __ movptr(rdi, Address(rax_argslot, 0));
911 __ movptr(Address(rdx_newarg, 0), rdi);
912 __ addptr(rax_argslot, wordSize);
913 __ addptr(rdx_newarg, wordSize);
914 __ cmpptr(rdx_newarg, rbx_oldarg);
915 __ jccb(Assembler::less, loop);
916
917 __ pop(rdi); // restore temp
918
919 __ movptr(rcx_recv, rcx_mh_vmtarget);
920 __ jump_to_method_handle_entry(rcx_recv, rdx_temp);
921 }
922 break;
923
924 case _adapter_drop_args:
925 {
926 // 'argslot' is the position of the first argument to nuke
927 __ movl(rax_argslot, rcx_amh_vmargslot);
928 __ lea(rax_argslot, __ argument_address(rax_argslot));
929
930 __ push(rdi); // need a temp
931 // (must do previous push after argslot address is taken)
932
933 // 'stack_move' is number of words to drop
934 Register rdi_stack_move = rdi;
935 __ movl2ptr(rdi_stack_move, rcx_amh_conversion);
936 __ sarptr(rdi_stack_move, CONV_STACK_MOVE_SHIFT);
937 remove_arg_slots(_masm, rdi_stack_move,
938 rax_argslot, rbx_temp, rdx_temp);
939
940 __ pop(rdi); // restore temp
941
942 __ movptr(rcx_recv, rcx_mh_vmtarget);
943 __ jump_to_method_handle_entry(rcx_recv, rdx_temp);
944 }
945 break;
946
947 case _adapter_collect_args:
948 __ unimplemented(entry_name(ek)); // %%% FIXME: NYI
949 break;
950
951 case _adapter_spread_args:
952 // handled completely by optimized cases
953 __ stop("init_AdapterMethodHandle should not issue this");
954 break;
955
956 case _adapter_opt_spread_0:
957 case _adapter_opt_spread_1:
958 case _adapter_opt_spread_more:
959 {
960 // spread an array out into a group of arguments
961 int length_constant = get_ek_adapter_opt_spread_info(ek);
962
963 // find the address of the array argument
964 __ movl(rax_argslot, rcx_amh_vmargslot);
965 __ lea(rax_argslot, __ argument_address(rax_argslot));
966
967 // grab some temps
968 { __ push(rsi); __ push(rdi); }
969 // (preceding pushes must be done after argslot address is taken!)
970 #define UNPUSH_RSI_RDI \
971 { __ pop(rdi); __ pop(rsi); }
972
973 // arx_argslot points both to the array and to the first output arg
974 vmarg = Address(rax_argslot, 0);
975
976 // Get the array value.
977 Register rsi_array = rsi;
978 Register rdx_array_klass = rdx_temp;
979 BasicType elem_type = T_OBJECT;
980 int length_offset = arrayOopDesc::length_offset_in_bytes();
981 int elem0_offset = arrayOopDesc::base_offset_in_bytes(elem_type);
982 __ movptr(rsi_array, vmarg);
983 Label skip_array_check;
984 if (length_constant == 0) {
985 __ testptr(rsi_array, rsi_array);
986 __ jcc(Assembler::zero, skip_array_check);
987 }
988 __ null_check(rsi_array, oopDesc::klass_offset_in_bytes());
989 __ load_klass(rdx_array_klass, rsi_array);
990
991 // Check the array type.
992 Register rbx_klass = rbx_temp;
993 __ movptr(rbx_klass, rcx_amh_argument); // this is a Class object!
994 __ movptr(rbx_klass, Address(rbx_klass, java_lang_Class::klass_offset_in_bytes()));
995
996 Label ok_array_klass, bad_array_klass, bad_array_length;
997 __ check_klass_subtype(rdx_array_klass, rbx_klass, rdi, ok_array_klass);
998 // If we get here, the type check failed!
999 __ jmp(bad_array_klass);
1000 __ bind(ok_array_klass);
1001
1002 // Check length.
1003 if (length_constant >= 0) {
1004 __ cmpl(Address(rsi_array, length_offset), length_constant);
1005 } else {
1006 Register rbx_vminfo = rbx_temp;
1007 __ movl(rbx_vminfo, rcx_amh_conversion);
1008 assert(CONV_VMINFO_SHIFT == 0, "preshifted");
1009 __ andl(rbx_vminfo, CONV_VMINFO_MASK);
1010 __ cmpl(rbx_vminfo, Address(rsi_array, length_offset));
1011 }
1012 __ jcc(Assembler::notEqual, bad_array_length);
1013
1014 Register rdx_argslot_limit = rdx_temp;
1015
1016 // Array length checks out. Now insert any required stack slots.
1017 if (length_constant == -1) {
1018 // Form a pointer to the end of the affected region.
1019 __ lea(rdx_argslot_limit, Address(rax_argslot, Interpreter::stackElementSize()));
1020 // 'stack_move' is negative number of words to insert
1021 Register rdi_stack_move = rdi;
1022 __ movl2ptr(rdi_stack_move, rcx_amh_conversion);
1023 __ sarptr(rdi_stack_move, CONV_STACK_MOVE_SHIFT);
1024 Register rsi_temp = rsi_array; // spill this
1025 insert_arg_slots(_masm, rdi_stack_move, -1,
1026 rax_argslot, rbx_temp, rsi_temp);
1027 // reload the array (since rsi was killed)
1028 __ movptr(rsi_array, vmarg);
1029 } else if (length_constant > 1) {
1030 int arg_mask = 0;
1031 int new_slots = (length_constant - 1);
1032 for (int i = 0; i < new_slots; i++) {
1033 arg_mask <<= 1;
1034 arg_mask |= _INSERT_REF_MASK;
1035 }
1036 insert_arg_slots(_masm, new_slots * stack_move_unit(), arg_mask,
1037 rax_argslot, rbx_temp, rdx_temp);
1038 } else if (length_constant == 1) {
1039 // no stack resizing required
1040 } else if (length_constant == 0) {
1041 remove_arg_slots(_masm, -stack_move_unit(),
1042 rax_argslot, rbx_temp, rdx_temp);
1043 }
1044
1045 // Copy from the array to the new slots.
1046 // Note: Stack change code preserves integrity of rax_argslot pointer.
1047 // So even after slot insertions, rax_argslot still points to first argument.
1048 if (length_constant == -1) {
1049 // [rax_argslot, rdx_argslot_limit) is the area we are inserting into.
1050 Register rsi_source = rsi_array;
1051 __ lea(rsi_source, Address(rsi_array, elem0_offset));
1052 Label loop;
1053 __ bind(loop);
1054 __ movptr(rbx_temp, Address(rsi_source, 0));
1055 __ movptr(Address(rax_argslot, 0), rbx_temp);
1056 __ addptr(rsi_source, type2aelembytes(elem_type));
1057 __ addptr(rax_argslot, Interpreter::stackElementSize());
1058 __ cmpptr(rax_argslot, rdx_argslot_limit);
1059 __ jccb(Assembler::less, loop);
1060 } else if (length_constant == 0) {
1061 __ bind(skip_array_check);
1062 // nothing to copy
1063 } else {
1064 int elem_offset = elem0_offset;
1065 int slot_offset = 0;
1066 for (int index = 0; index < length_constant; index++) {
1067 __ movptr(rbx_temp, Address(rsi_array, elem_offset));
1068 __ movptr(Address(rax_argslot, slot_offset), rbx_temp);
1069 elem_offset += type2aelembytes(elem_type);
1070 slot_offset += Interpreter::stackElementSize();
1071 }
1072 }
1073
1074 // Arguments are spread. Move to next method handle.
1075 UNPUSH_RSI_RDI;
1076 __ movptr(rcx_recv, rcx_mh_vmtarget);
1077 __ jump_to_method_handle_entry(rcx_recv, rdx_temp);
1078
1079 __ bind(bad_array_klass);
1080 UNPUSH_RSI_RDI;
1081 __ pushptr(Address(rdx_array_klass, java_mirror_offset)); // required type
1082 __ pushptr(vmarg); // bad array
1083 __ push((int)Bytecodes::_aaload); // who is complaining?
1084 __ jump(ExternalAddress(from_interpreted_entry(_raise_exception)));
1085
1086 __ bind(bad_array_length);
1087 UNPUSH_RSI_RDI;
1088 __ push(rcx_recv); // AMH requiring a certain length
1089 __ pushptr(vmarg); // bad array
1090 __ push((int)Bytecodes::_arraylength); // who is complaining?
1091 __ jump(ExternalAddress(from_interpreted_entry(_raise_exception)));
1092
1093 #undef UNPUSH_RSI_RDI
1094 }
1095 break;
1096
1097 case _adapter_flyby:
1098 case _adapter_ricochet:
1099 __ unimplemented(entry_name(ek)); // %%% FIXME: NYI
1100 break;
1101
1102 default: ShouldNotReachHere();
1103 }
1104 __ hlt();
1105
1106 address me_cookie = MethodHandleEntry::start_compiled_entry(_masm, interp_entry);
1107 __ unimplemented(entry_name(ek)); // %%% FIXME: NYI
1108
1109 init_entry(ek, MethodHandleEntry::finish_compiled_entry(_masm, me_cookie));
1110 }