1 /*
2 * Copyright (c) 1997, 2010, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
23 */
24
25 #include "precompiled.hpp"
26 #include "interpreter/interpreter.hpp"
27 #include "memory/allocation.inline.hpp"
28 #include "prims/methodHandles.hpp"
29
30 #define __ _masm->
31
32 #ifdef PRODUCT
33 #define BLOCK_COMMENT(str) /* nothing */
34 #else
35 #define BLOCK_COMMENT(str) __ block_comment(str)
36 #endif
37
38 #define BIND(label) bind(label); BLOCK_COMMENT(#label ":")
39
40 address MethodHandleEntry::start_compiled_entry(MacroAssembler* _masm,
41 address interpreted_entry) {
42 // Just before the actual machine code entry point, allocate space
43 // for a MethodHandleEntry::Data record, so that we can manage everything
44 // from one base pointer.
45 __ align(wordSize);
46 address target = __ pc() + sizeof(Data);
47 while (__ pc() < target) {
48 __ nop();
49 __ align(wordSize);
50 }
51
52 MethodHandleEntry* me = (MethodHandleEntry*) __ pc();
53 me->set_end_address(__ pc()); // set a temporary end_address
54 me->set_from_interpreted_entry(interpreted_entry);
55 me->set_type_checking_entry(NULL);
56
57 return (address) me;
58 }
59
60 MethodHandleEntry* MethodHandleEntry::finish_compiled_entry(MacroAssembler* _masm,
61 address start_addr) {
62 MethodHandleEntry* me = (MethodHandleEntry*) start_addr;
63 assert(me->end_address() == start_addr, "valid ME");
64
65 // Fill in the real end_address:
66 __ align(wordSize);
67 me->set_end_address(__ pc());
68
69 return me;
70 }
71
72 #ifdef ASSERT
73 static void verify_argslot(MacroAssembler* _masm, Register argslot_reg,
74 const char* error_message) {
75 // Verify that argslot lies within (rsp, rbp].
76 Label L_ok, L_bad;
77 BLOCK_COMMENT("{ verify_argslot");
78 __ cmpptr(argslot_reg, rbp);
79 __ jccb(Assembler::above, L_bad);
80 __ cmpptr(rsp, argslot_reg);
81 __ jccb(Assembler::below, L_ok);
82 __ bind(L_bad);
83 __ stop(error_message);
84 __ bind(L_ok);
85 BLOCK_COMMENT("} verify_argslot");
86 }
87 #endif
88
89
90 // Code generation
91 address MethodHandles::generate_method_handle_interpreter_entry(MacroAssembler* _masm) {
92 // rbx: methodOop
93 // rcx: receiver method handle (must load from sp[MethodTypeForm.vmslots])
94 // rsi/r13: sender SP (must preserve; see prepare_to_jump_from_interpreted)
95 // rdx, rdi: garbage temp, blown away
96
97 Register rbx_method = rbx;
98 Register rcx_recv = rcx;
99 Register rax_mtype = rax;
100 Register rdx_temp = rdx;
101 Register rdi_temp = rdi;
102
103 // emit WrongMethodType path first, to enable jccb back-branch from main path
104 Label wrong_method_type;
105 __ bind(wrong_method_type);
106 Label invoke_generic_slow_path;
107 assert(methodOopDesc::intrinsic_id_size_in_bytes() == sizeof(u1), "");;
108 __ cmpb(Address(rbx_method, methodOopDesc::intrinsic_id_offset_in_bytes()), (int) vmIntrinsics::_invokeExact);
109 __ jcc(Assembler::notEqual, invoke_generic_slow_path);
110 __ push(rax_mtype); // required mtype
111 __ push(rcx_recv); // bad mh (1st stacked argument)
112 __ jump(ExternalAddress(Interpreter::throw_WrongMethodType_entry()));
113
114 // here's where control starts out:
115 __ align(CodeEntryAlignment);
116 address entry_point = __ pc();
117
118 // fetch the MethodType from the method handle into rax (the 'check' register)
119 {
120 Register tem = rbx_method;
121 for (jint* pchase = methodOopDesc::method_type_offsets_chain(); (*pchase) != -1; pchase++) {
122 __ movptr(rax_mtype, Address(tem, *pchase));
123 tem = rax_mtype; // in case there is another indirection
124 }
125 }
126
127 // given the MethodType, find out where the MH argument is buried
128 __ movptr(rdx_temp, Address(rax_mtype,
129 __ delayed_value(java_dyn_MethodType::form_offset_in_bytes, rdi_temp)));
130 Register rdx_vmslots = rdx_temp;
131 __ movl(rdx_vmslots, Address(rdx_temp,
132 __ delayed_value(java_dyn_MethodTypeForm::vmslots_offset_in_bytes, rdi_temp)));
133 __ movptr(rcx_recv, __ argument_address(rdx_vmslots));
134
135 trace_method_handle(_masm, "invokeExact");
136
137 __ check_method_handle_type(rax_mtype, rcx_recv, rdi_temp, wrong_method_type);
138 __ jump_to_method_handle_entry(rcx_recv, rdi_temp);
139
140 // for invokeGeneric (only), apply argument and result conversions on the fly
141 __ bind(invoke_generic_slow_path);
142 #ifdef ASSERT
143 { Label L;
144 __ cmpb(Address(rbx_method, methodOopDesc::intrinsic_id_offset_in_bytes()), (int) vmIntrinsics::_invokeGeneric);
145 __ jcc(Assembler::equal, L);
146 __ stop("bad methodOop::intrinsic_id");
147 __ bind(L);
148 }
149 #endif //ASSERT
150 Register rbx_temp = rbx_method; // don't need it now
151
152 // make room on the stack for another pointer:
153 Register rcx_argslot = rcx_recv;
154 __ lea(rcx_argslot, __ argument_address(rdx_vmslots, 1));
155 insert_arg_slots(_masm, 2 * stack_move_unit(), _INSERT_REF_MASK,
156 rcx_argslot, rbx_temp, rdx_temp);
157
158 // load up an adapter from the calling type (Java weaves this)
159 __ movptr(rdx_temp, Address(rax_mtype,
160 __ delayed_value(java_dyn_MethodType::form_offset_in_bytes, rdi_temp)));
161 Register rdx_adapter = rdx_temp;
162 // movptr(rdx_adapter, Address(rdx_temp, java_dyn_MethodTypeForm::genericInvoker_offset_in_bytes()));
163 // deal with old JDK versions:
164 __ lea(rdi_temp, Address(rdx_temp,
165 __ delayed_value(java_dyn_MethodTypeForm::genericInvoker_offset_in_bytes, rdi_temp)));
166 __ cmpptr(rdi_temp, rdx_temp);
167 Label sorry_no_invoke_generic;
168 __ jccb(Assembler::below, sorry_no_invoke_generic);
169
170 __ movptr(rdx_adapter, Address(rdi_temp, 0));
171 __ testptr(rdx_adapter, rdx_adapter);
172 __ jccb(Assembler::zero, sorry_no_invoke_generic);
173 __ movptr(Address(rcx_argslot, 1 * Interpreter::stackElementSize), rdx_adapter);
174 // As a trusted first argument, pass the type being called, so the adapter knows
175 // the actual types of the arguments and return values.
176 // (Generic invokers are shared among form-families of method-type.)
177 __ movptr(Address(rcx_argslot, 0 * Interpreter::stackElementSize), rax_mtype);
178 // FIXME: assert that rdx_adapter is of the right method-type.
179 __ mov(rcx, rdx_adapter);
180 trace_method_handle(_masm, "invokeGeneric");
181 __ jump_to_method_handle_entry(rcx, rdi_temp);
182
183 __ bind(sorry_no_invoke_generic); // no invokeGeneric implementation available!
184 __ movptr(rcx_recv, Address(rcx_argslot, -1 * Interpreter::stackElementSize)); // recover original MH
185 __ push(rax_mtype); // required mtype
186 __ push(rcx_recv); // bad mh (1st stacked argument)
187 __ jump(ExternalAddress(Interpreter::throw_WrongMethodType_entry()));
188
189 return entry_point;
190 }
191
192 // Helper to insert argument slots into the stack.
193 // arg_slots must be a multiple of stack_move_unit() and <= 0
194 void MethodHandles::insert_arg_slots(MacroAssembler* _masm,
195 RegisterOrConstant arg_slots,
196 int arg_mask,
197 Register rax_argslot,
198 Register rbx_temp, Register rdx_temp, Register temp3_reg) {
199 assert(temp3_reg == noreg, "temp3 not required");
200 assert_different_registers(rax_argslot, rbx_temp, rdx_temp,
201 (!arg_slots.is_register() ? rsp : arg_slots.as_register()));
202
203 #ifdef ASSERT
204 verify_argslot(_masm, rax_argslot, "insertion point must fall within current frame");
205 if (arg_slots.is_register()) {
206 Label L_ok, L_bad;
207 __ cmpptr(arg_slots.as_register(), (int32_t) NULL_WORD);
208 __ jccb(Assembler::greater, L_bad);
209 __ testl(arg_slots.as_register(), -stack_move_unit() - 1);
210 __ jccb(Assembler::zero, L_ok);
211 __ bind(L_bad);
212 __ stop("assert arg_slots <= 0 and clear low bits");
213 __ bind(L_ok);
214 } else {
215 assert(arg_slots.as_constant() <= 0, "");
216 assert(arg_slots.as_constant() % -stack_move_unit() == 0, "");
217 }
218 #endif //ASSERT
219
220 #ifdef _LP64
221 if (arg_slots.is_register()) {
222 // clean high bits of stack motion register (was loaded as an int)
223 __ movslq(arg_slots.as_register(), arg_slots.as_register());
224 }
225 #endif
226
227 // Make space on the stack for the inserted argument(s).
228 // Then pull down everything shallower than rax_argslot.
229 // The stacked return address gets pulled down with everything else.
230 // That is, copy [rsp, argslot) downward by -size words. In pseudo-code:
231 // rsp -= size;
232 // for (rdx = rsp + size; rdx < argslot; rdx++)
233 // rdx[-size] = rdx[0]
234 // argslot -= size;
235 BLOCK_COMMENT("insert_arg_slots {");
236 __ mov(rdx_temp, rsp); // source pointer for copy
237 __ lea(rsp, Address(rsp, arg_slots, Address::times_ptr));
238 {
239 Label loop;
240 __ BIND(loop);
241 // pull one word down each time through the loop
242 __ movptr(rbx_temp, Address(rdx_temp, 0));
243 __ movptr(Address(rdx_temp, arg_slots, Address::times_ptr), rbx_temp);
244 __ addptr(rdx_temp, wordSize);
245 __ cmpptr(rdx_temp, rax_argslot);
246 __ jccb(Assembler::less, loop);
247 }
248
249 // Now move the argslot down, to point to the opened-up space.
250 __ lea(rax_argslot, Address(rax_argslot, arg_slots, Address::times_ptr));
251 BLOCK_COMMENT("} insert_arg_slots");
252 }
253
254 // Helper to remove argument slots from the stack.
255 // arg_slots must be a multiple of stack_move_unit() and >= 0
256 void MethodHandles::remove_arg_slots(MacroAssembler* _masm,
257 RegisterOrConstant arg_slots,
258 Register rax_argslot,
259 Register rbx_temp, Register rdx_temp, Register temp3_reg) {
260 assert(temp3_reg == noreg, "temp3 not required");
261 assert_different_registers(rax_argslot, rbx_temp, rdx_temp,
262 (!arg_slots.is_register() ? rsp : arg_slots.as_register()));
263
264 #ifdef ASSERT
265 // Verify that [argslot..argslot+size) lies within (rsp, rbp).
266 __ lea(rbx_temp, Address(rax_argslot, arg_slots, Address::times_ptr));
267 verify_argslot(_masm, rbx_temp, "deleted argument(s) must fall within current frame");
268 if (arg_slots.is_register()) {
269 Label L_ok, L_bad;
270 __ cmpptr(arg_slots.as_register(), (int32_t) NULL_WORD);
271 __ jccb(Assembler::less, L_bad);
272 __ testl(arg_slots.as_register(), -stack_move_unit() - 1);
273 __ jccb(Assembler::zero, L_ok);
274 __ bind(L_bad);
275 __ stop("assert arg_slots >= 0 and clear low bits");
276 __ bind(L_ok);
277 } else {
278 assert(arg_slots.as_constant() >= 0, "");
279 assert(arg_slots.as_constant() % -stack_move_unit() == 0, "");
280 }
281 #endif //ASSERT
282
283 #ifdef _LP64
284 if (false) { // not needed, since register is positive
285 // clean high bits of stack motion register (was loaded as an int)
286 if (arg_slots.is_register())
287 __ movslq(arg_slots.as_register(), arg_slots.as_register());
288 }
289 #endif
290
291 BLOCK_COMMENT("remove_arg_slots {");
292 // Pull up everything shallower than rax_argslot.
293 // Then remove the excess space on the stack.
294 // The stacked return address gets pulled up with everything else.
295 // That is, copy [rsp, argslot) upward by size words. In pseudo-code:
296 // for (rdx = argslot-1; rdx >= rsp; --rdx)
297 // rdx[size] = rdx[0]
298 // argslot += size;
299 // rsp += size;
300 __ lea(rdx_temp, Address(rax_argslot, -wordSize)); // source pointer for copy
301 {
302 Label loop;
303 __ BIND(loop);
304 // pull one word up each time through the loop
305 __ movptr(rbx_temp, Address(rdx_temp, 0));
306 __ movptr(Address(rdx_temp, arg_slots, Address::times_ptr), rbx_temp);
307 __ addptr(rdx_temp, -wordSize);
308 __ cmpptr(rdx_temp, rsp);
309 __ jccb(Assembler::greaterEqual, loop);
310 }
311
312 // Now move the argslot up, to point to the just-copied block.
313 __ lea(rsp, Address(rsp, arg_slots, Address::times_ptr));
314 // And adjust the argslot address to point at the deletion point.
315 __ lea(rax_argslot, Address(rax_argslot, arg_slots, Address::times_ptr));
316 BLOCK_COMMENT("} remove_arg_slots");
317 }
318
319 #ifndef PRODUCT
320 extern "C" void print_method_handle(oop mh);
321 void trace_method_handle_stub(const char* adaptername,
322 oop mh,
323 intptr_t* saved_regs,
324 intptr_t* entry_sp,
325 intptr_t* saved_sp,
326 intptr_t* saved_bp) {
327 // called as a leaf from native code: do not block the JVM!
328 intptr_t* last_sp = (intptr_t*) saved_bp[frame::interpreter_frame_last_sp_offset];
329 intptr_t* base_sp = (intptr_t*) saved_bp[frame::interpreter_frame_monitor_block_top_offset];
330 printf("MH %s mh="INTPTR_FORMAT" sp=("INTPTR_FORMAT"+"INTX_FORMAT") stack_size="INTX_FORMAT" bp="INTPTR_FORMAT"\n",
331 adaptername, (intptr_t)mh, (intptr_t)entry_sp, (intptr_t)(saved_sp - entry_sp), (intptr_t)(base_sp - last_sp), (intptr_t)saved_bp);
332 if (last_sp != saved_sp && last_sp != NULL)
333 printf("*** last_sp="INTPTR_FORMAT"\n", (intptr_t)last_sp);
334 if (Verbose) {
335 printf(" reg dump: ");
336 int saved_regs_count = (entry_sp-1) - saved_regs;
337 // 32 bit: rdi rsi rbp rsp; rbx rdx rcx (*) rax
338 int i;
339 for (i = 0; i <= saved_regs_count; i++) {
340 if (i > 0 && i % 4 == 0 && i != saved_regs_count)
341 printf("\n + dump: ");
342 printf(" %d: "INTPTR_FORMAT, i, saved_regs[i]);
343 }
344 printf("\n");
345 int stack_dump_count = 16;
346 if (stack_dump_count < (int)(saved_bp + 2 - saved_sp))
347 stack_dump_count = (int)(saved_bp + 2 - saved_sp);
348 if (stack_dump_count > 64) stack_dump_count = 48;
349 for (i = 0; i < stack_dump_count; i += 4) {
350 printf(" dump at SP[%d] "INTPTR_FORMAT": "INTPTR_FORMAT" "INTPTR_FORMAT" "INTPTR_FORMAT" "INTPTR_FORMAT"\n",
351 i, &entry_sp[i+0], entry_sp[i+0], entry_sp[i+1], entry_sp[i+2], entry_sp[i+3]);
352 }
353 print_method_handle(mh);
354 }
355 }
356 void MethodHandles::trace_method_handle(MacroAssembler* _masm, const char* adaptername) {
357 if (!TraceMethodHandles) return;
358 BLOCK_COMMENT("trace_method_handle {");
359 __ push(rax);
360 __ lea(rax, Address(rsp, wordSize*6)); // entry_sp
361 __ pusha();
362 // arguments:
363 __ push(rbp); // interpreter frame pointer
364 __ push(rsi); // saved_sp
365 __ push(rax); // entry_sp
366 __ push(rcx); // mh
367 __ push(rcx);
368 __ movptr(Address(rsp, 0), (intptr_t) adaptername);
369 __ call_VM_leaf(CAST_FROM_FN_PTR(address, trace_method_handle_stub), 5);
370 __ popa();
371 __ pop(rax);
372 BLOCK_COMMENT("} trace_method_handle");
373 }
374 #endif //PRODUCT
375
376 // which conversion op types are implemented here?
377 int MethodHandles::adapter_conversion_ops_supported_mask() {
378 return ((1<<sun_dyn_AdapterMethodHandle::OP_RETYPE_ONLY)
379 |(1<<sun_dyn_AdapterMethodHandle::OP_RETYPE_RAW)
380 |(1<<sun_dyn_AdapterMethodHandle::OP_CHECK_CAST)
381 |(1<<sun_dyn_AdapterMethodHandle::OP_PRIM_TO_PRIM)
382 |(1<<sun_dyn_AdapterMethodHandle::OP_REF_TO_PRIM)
383 |(1<<sun_dyn_AdapterMethodHandle::OP_SWAP_ARGS)
384 |(1<<sun_dyn_AdapterMethodHandle::OP_ROT_ARGS)
385 |(1<<sun_dyn_AdapterMethodHandle::OP_DUP_ARGS)
386 |(1<<sun_dyn_AdapterMethodHandle::OP_DROP_ARGS)
387 //|(1<<sun_dyn_AdapterMethodHandle::OP_SPREAD_ARGS) //BUG!
388 );
389 // FIXME: MethodHandlesTest gets a crash if we enable OP_SPREAD_ARGS.
390 }
391
392 // Generate an "entry" field for a method handle.
393 // This determines how the method handle will respond to calls.
394 void MethodHandles::generate_method_handle_stub(MacroAssembler* _masm, MethodHandles::EntryKind ek) {
395 // Here is the register state during an interpreted call,
396 // as set up by generate_method_handle_interpreter_entry():
397 // - rbx: garbage temp (was MethodHandle.invoke methodOop, unused)
398 // - rcx: receiver method handle
399 // - rax: method handle type (only used by the check_mtype entry point)
400 // - rsi/r13: sender SP (must preserve; see prepare_to_jump_from_interpreted)
401 // - rdx: garbage temp, can blow away
402
403 Register rcx_recv = rcx;
404 Register rax_argslot = rax;
405 Register rbx_temp = rbx;
406 Register rdx_temp = rdx;
407
408 // This guy is set up by prepare_to_jump_from_interpreted (from interpreted calls)
409 // and gen_c2i_adapter (from compiled calls):
410 Register saved_last_sp = LP64_ONLY(r13) NOT_LP64(rsi);
411
412 guarantee(java_dyn_MethodHandle::vmentry_offset_in_bytes() != 0, "must have offsets");
413
414 // some handy addresses
415 Address rbx_method_fie( rbx, methodOopDesc::from_interpreted_offset() );
416
417 Address rcx_mh_vmtarget( rcx_recv, java_dyn_MethodHandle::vmtarget_offset_in_bytes() );
418 Address rcx_dmh_vmindex( rcx_recv, sun_dyn_DirectMethodHandle::vmindex_offset_in_bytes() );
419
420 Address rcx_bmh_vmargslot( rcx_recv, sun_dyn_BoundMethodHandle::vmargslot_offset_in_bytes() );
421 Address rcx_bmh_argument( rcx_recv, sun_dyn_BoundMethodHandle::argument_offset_in_bytes() );
422
423 Address rcx_amh_vmargslot( rcx_recv, sun_dyn_AdapterMethodHandle::vmargslot_offset_in_bytes() );
424 Address rcx_amh_argument( rcx_recv, sun_dyn_AdapterMethodHandle::argument_offset_in_bytes() );
425 Address rcx_amh_conversion( rcx_recv, sun_dyn_AdapterMethodHandle::conversion_offset_in_bytes() );
426 Address vmarg; // __ argument_address(vmargslot)
427
428 const int java_mirror_offset = klassOopDesc::klass_part_offset_in_bytes() + Klass::java_mirror_offset_in_bytes();
429
430 if (have_entry(ek)) {
431 __ nop(); // empty stubs make SG sick
432 return;
433 }
434
435 address interp_entry = __ pc();
436 if (UseCompressedOops) __ unimplemented("UseCompressedOops");
437
438 trace_method_handle(_masm, entry_name(ek));
439
440 BLOCK_COMMENT(entry_name(ek));
441
442 switch ((int) ek) {
443 case _raise_exception:
444 {
445 // Not a real MH entry, but rather shared code for raising an exception.
446 // Extra local arguments are pushed on stack, as required type at TOS+8,
447 // failing object (or NULL) at TOS+4, failing bytecode type at TOS.
448 // Beyond those local arguments are the PC, of course.
449 Register rdx_code = rdx_temp;
450 Register rcx_fail = rcx_recv;
451 Register rax_want = rax_argslot;
452 Register rdi_pc = rdi;
453 __ pop(rdx_code); // TOS+0
454 __ pop(rcx_fail); // TOS+4
455 __ pop(rax_want); // TOS+8
456 __ pop(rdi_pc); // caller PC
457
458 __ mov(rsp, rsi); // cut the stack back to where the caller started
459
460 // Repush the arguments as if coming from the interpreter.
461 __ push(rdx_code);
462 __ push(rcx_fail);
463 __ push(rax_want);
464
465 Register rbx_method = rbx_temp;
466 Label no_method;
467 // FIXME: fill in _raise_exception_method with a suitable sun.dyn method
468 __ movptr(rbx_method, ExternalAddress((address) &_raise_exception_method));
469 __ testptr(rbx_method, rbx_method);
470 __ jccb(Assembler::zero, no_method);
471 int jobject_oop_offset = 0;
472 __ movptr(rbx_method, Address(rbx_method, jobject_oop_offset)); // dereference the jobject
473 __ testptr(rbx_method, rbx_method);
474 __ jccb(Assembler::zero, no_method);
475 __ verify_oop(rbx_method);
476 __ push(rdi_pc); // and restore caller PC
477 __ jmp(rbx_method_fie);
478
479 // If we get here, the Java runtime did not do its job of creating the exception.
480 // Do something that is at least causes a valid throw from the interpreter.
481 __ bind(no_method);
482 __ pop(rax_want);
483 __ pop(rcx_fail);
484 __ push(rax_want);
485 __ push(rcx_fail);
486 __ jump(ExternalAddress(Interpreter::throw_WrongMethodType_entry()));
487 }
488 break;
489
490 case _invokestatic_mh:
491 case _invokespecial_mh:
492 {
493 Register rbx_method = rbx_temp;
494 __ movptr(rbx_method, rcx_mh_vmtarget); // target is a methodOop
495 __ verify_oop(rbx_method);
496 // same as TemplateTable::invokestatic or invokespecial,
497 // minus the CP setup and profiling:
498 if (ek == _invokespecial_mh) {
499 // Must load & check the first argument before entering the target method.
500 __ load_method_handle_vmslots(rax_argslot, rcx_recv, rdx_temp);
501 __ movptr(rcx_recv, __ argument_address(rax_argslot, -1));
502 __ null_check(rcx_recv);
503 __ verify_oop(rcx_recv);
504 }
505 __ jmp(rbx_method_fie);
506 }
507 break;
508
509 case _invokevirtual_mh:
510 {
511 // same as TemplateTable::invokevirtual,
512 // minus the CP setup and profiling:
513
514 // pick out the vtable index and receiver offset from the MH,
515 // and then we can discard it:
516 __ load_method_handle_vmslots(rax_argslot, rcx_recv, rdx_temp);
517 Register rbx_index = rbx_temp;
518 __ movl(rbx_index, rcx_dmh_vmindex);
519 // Note: The verifier allows us to ignore rcx_mh_vmtarget.
520 __ movptr(rcx_recv, __ argument_address(rax_argslot, -1));
521 __ null_check(rcx_recv, oopDesc::klass_offset_in_bytes());
522
523 // get receiver klass
524 Register rax_klass = rax_argslot;
525 __ load_klass(rax_klass, rcx_recv);
526 __ verify_oop(rax_klass);
527
528 // get target methodOop & entry point
529 const int base = instanceKlass::vtable_start_offset() * wordSize;
530 assert(vtableEntry::size() * wordSize == wordSize, "adjust the scaling in the code below");
531 Address vtable_entry_addr(rax_klass,
532 rbx_index, Address::times_ptr,
533 base + vtableEntry::method_offset_in_bytes());
534 Register rbx_method = rbx_temp;
535 __ movptr(rbx_method, vtable_entry_addr);
536
537 __ verify_oop(rbx_method);
538 __ jmp(rbx_method_fie);
539 }
540 break;
541
542 case _invokeinterface_mh:
543 {
544 // same as TemplateTable::invokeinterface,
545 // minus the CP setup and profiling:
546
547 // pick out the interface and itable index from the MH.
548 __ load_method_handle_vmslots(rax_argslot, rcx_recv, rdx_temp);
549 Register rdx_intf = rdx_temp;
550 Register rbx_index = rbx_temp;
551 __ movptr(rdx_intf, rcx_mh_vmtarget);
552 __ movl(rbx_index, rcx_dmh_vmindex);
553 __ movptr(rcx_recv, __ argument_address(rax_argslot, -1));
554 __ null_check(rcx_recv, oopDesc::klass_offset_in_bytes());
555
556 // get receiver klass
557 Register rax_klass = rax_argslot;
558 __ load_klass(rax_klass, rcx_recv);
559 __ verify_oop(rax_klass);
560
561 Register rdi_temp = rdi;
562 Register rbx_method = rbx_index;
563
564 // get interface klass
565 Label no_such_interface;
566 __ verify_oop(rdx_intf);
567 __ lookup_interface_method(rax_klass, rdx_intf,
568 // note: next two args must be the same:
569 rbx_index, rbx_method,
570 rdi_temp,
571 no_such_interface);
572
573 __ verify_oop(rbx_method);
574 __ jmp(rbx_method_fie);
575 __ hlt();
576
577 __ bind(no_such_interface);
578 // Throw an exception.
579 // For historical reasons, it will be IncompatibleClassChangeError.
580 __ pushptr(Address(rdx_intf, java_mirror_offset)); // required interface
581 __ push(rcx_recv); // bad receiver
582 __ push((int)Bytecodes::_invokeinterface); // who is complaining?
583 __ jump(ExternalAddress(from_interpreted_entry(_raise_exception)));
584 }
585 break;
586
587 case _bound_ref_mh:
588 case _bound_int_mh:
589 case _bound_long_mh:
590 case _bound_ref_direct_mh:
591 case _bound_int_direct_mh:
592 case _bound_long_direct_mh:
593 {
594 bool direct_to_method = (ek >= _bound_ref_direct_mh);
595 BasicType arg_type = T_ILLEGAL;
596 int arg_mask = _INSERT_NO_MASK;
597 int arg_slots = -1;
598 get_ek_bound_mh_info(ek, arg_type, arg_mask, arg_slots);
599
600 // make room for the new argument:
601 __ movl(rax_argslot, rcx_bmh_vmargslot);
602 __ lea(rax_argslot, __ argument_address(rax_argslot));
603 insert_arg_slots(_masm, arg_slots * stack_move_unit(), arg_mask,
604 rax_argslot, rbx_temp, rdx_temp);
605
606 // store bound argument into the new stack slot:
607 __ movptr(rbx_temp, rcx_bmh_argument);
608 Address prim_value_addr(rbx_temp, java_lang_boxing_object::value_offset_in_bytes(arg_type));
609 if (arg_type == T_OBJECT) {
610 __ movptr(Address(rax_argslot, 0), rbx_temp);
611 } else {
612 __ load_sized_value(rdx_temp, prim_value_addr,
613 type2aelembytes(arg_type), is_signed_subword_type(arg_type));
614 __ movptr(Address(rax_argslot, 0), rdx_temp);
615 #ifndef _LP64
616 if (arg_slots == 2) {
617 __ movl(rdx_temp, prim_value_addr.plus_disp(wordSize));
618 __ movl(Address(rax_argslot, Interpreter::stackElementSize), rdx_temp);
619 }
620 #endif //_LP64
621 }
622
623 if (direct_to_method) {
624 Register rbx_method = rbx_temp;
625 __ movptr(rbx_method, rcx_mh_vmtarget);
626 __ verify_oop(rbx_method);
627 __ jmp(rbx_method_fie);
628 } else {
629 __ movptr(rcx_recv, rcx_mh_vmtarget);
630 __ verify_oop(rcx_recv);
631 __ jump_to_method_handle_entry(rcx_recv, rdx_temp);
632 }
633 }
634 break;
635
636 case _adapter_retype_only:
637 case _adapter_retype_raw:
638 // immediately jump to the next MH layer:
639 __ movptr(rcx_recv, rcx_mh_vmtarget);
640 __ verify_oop(rcx_recv);
641 __ jump_to_method_handle_entry(rcx_recv, rdx_temp);
642 // This is OK when all parameter types widen.
643 // It is also OK when a return type narrows.
644 break;
645
646 case _adapter_check_cast:
647 {
648 // temps:
649 Register rbx_klass = rbx_temp; // interesting AMH data
650
651 // check a reference argument before jumping to the next layer of MH:
652 __ movl(rax_argslot, rcx_amh_vmargslot);
653 vmarg = __ argument_address(rax_argslot);
654
655 // What class are we casting to?
656 __ movptr(rbx_klass, rcx_amh_argument); // this is a Class object!
657 __ movptr(rbx_klass, Address(rbx_klass, java_lang_Class::klass_offset_in_bytes()));
658
659 Label done;
660 __ movptr(rdx_temp, vmarg);
661 __ testptr(rdx_temp, rdx_temp);
662 __ jccb(Assembler::zero, done); // no cast if null
663 __ load_klass(rdx_temp, rdx_temp);
664
665 // live at this point:
666 // - rbx_klass: klass required by the target method
667 // - rdx_temp: argument klass to test
668 // - rcx_recv: adapter method handle
669 __ check_klass_subtype(rdx_temp, rbx_klass, rax_argslot, done);
670
671 // If we get here, the type check failed!
672 // Call the wrong_method_type stub, passing the failing argument type in rax.
673 Register rax_mtype = rax_argslot;
674 __ movl(rax_argslot, rcx_amh_vmargslot); // reload argslot field
675 __ movptr(rdx_temp, vmarg);
676
677 __ pushptr(rcx_amh_argument); // required class
678 __ push(rdx_temp); // bad object
679 __ push((int)Bytecodes::_checkcast); // who is complaining?
680 __ jump(ExternalAddress(from_interpreted_entry(_raise_exception)));
681
682 __ bind(done);
683 // get the new MH:
684 __ movptr(rcx_recv, rcx_mh_vmtarget);
685 __ jump_to_method_handle_entry(rcx_recv, rdx_temp);
686 }
687 break;
688
689 case _adapter_prim_to_prim:
690 case _adapter_ref_to_prim:
691 // handled completely by optimized cases
692 __ stop("init_AdapterMethodHandle should not issue this");
693 break;
694
695 case _adapter_opt_i2i: // optimized subcase of adapt_prim_to_prim
696 //case _adapter_opt_f2i: // optimized subcase of adapt_prim_to_prim
697 case _adapter_opt_l2i: // optimized subcase of adapt_prim_to_prim
698 case _adapter_opt_unboxi: // optimized subcase of adapt_ref_to_prim
699 {
700 // perform an in-place conversion to int or an int subword
701 __ movl(rax_argslot, rcx_amh_vmargslot);
702 vmarg = __ argument_address(rax_argslot);
703
704 switch (ek) {
705 case _adapter_opt_i2i:
706 __ movl(rdx_temp, vmarg);
707 break;
708 case _adapter_opt_l2i:
709 {
710 // just delete the extra slot; on a little-endian machine we keep the first
711 __ lea(rax_argslot, __ argument_address(rax_argslot, 1));
712 remove_arg_slots(_masm, -stack_move_unit(),
713 rax_argslot, rbx_temp, rdx_temp);
714 vmarg = Address(rax_argslot, -Interpreter::stackElementSize);
715 __ movl(rdx_temp, vmarg);
716 }
717 break;
718 case _adapter_opt_unboxi:
719 {
720 // Load the value up from the heap.
721 __ movptr(rdx_temp, vmarg);
722 int value_offset = java_lang_boxing_object::value_offset_in_bytes(T_INT);
723 #ifdef ASSERT
724 for (int bt = T_BOOLEAN; bt < T_INT; bt++) {
725 if (is_subword_type(BasicType(bt)))
726 assert(value_offset == java_lang_boxing_object::value_offset_in_bytes(BasicType(bt)), "");
727 }
728 #endif
729 __ null_check(rdx_temp, value_offset);
730 __ movl(rdx_temp, Address(rdx_temp, value_offset));
731 // We load this as a word. Because we are little-endian,
732 // the low bits will be correct, but the high bits may need cleaning.
733 // The vminfo will guide us to clean those bits.
734 }
735 break;
736 default:
737 ShouldNotReachHere();
738 }
739
740 // Do the requested conversion and store the value.
741 Register rbx_vminfo = rbx_temp;
742 __ movl(rbx_vminfo, rcx_amh_conversion);
743 assert(CONV_VMINFO_SHIFT == 0, "preshifted");
744
745 // get the new MH:
746 __ movptr(rcx_recv, rcx_mh_vmtarget);
747 // (now we are done with the old MH)
748
749 // original 32-bit vmdata word must be of this form:
750 // | MBZ:6 | signBitCount:8 | srcDstTypes:8 | conversionOp:8 |
751 __ xchgptr(rcx, rbx_vminfo); // free rcx for shifts
752 __ shll(rdx_temp /*, rcx*/);
753 Label zero_extend, done;
754 __ testl(rcx, CONV_VMINFO_SIGN_FLAG);
755 __ jccb(Assembler::zero, zero_extend);
756
757 // this path is taken for int->byte, int->short
758 __ sarl(rdx_temp /*, rcx*/);
759 __ jmpb(done);
760
761 __ bind(zero_extend);
762 // this is taken for int->char
763 __ shrl(rdx_temp /*, rcx*/);
764
765 __ bind(done);
766 __ movl(vmarg, rdx_temp); // Store the value.
767 __ xchgptr(rcx, rbx_vminfo); // restore rcx_recv
768
769 __ jump_to_method_handle_entry(rcx_recv, rdx_temp);
770 }
771 break;
772
773 case _adapter_opt_i2l: // optimized subcase of adapt_prim_to_prim
774 case _adapter_opt_unboxl: // optimized subcase of adapt_ref_to_prim
775 {
776 // perform an in-place int-to-long or ref-to-long conversion
777 __ movl(rax_argslot, rcx_amh_vmargslot);
778
779 // on a little-endian machine we keep the first slot and add another after
780 __ lea(rax_argslot, __ argument_address(rax_argslot, 1));
781 insert_arg_slots(_masm, stack_move_unit(), _INSERT_INT_MASK,
782 rax_argslot, rbx_temp, rdx_temp);
783 Address vmarg1(rax_argslot, -Interpreter::stackElementSize);
784 Address vmarg2 = vmarg1.plus_disp(Interpreter::stackElementSize);
785
786 switch (ek) {
787 case _adapter_opt_i2l:
788 {
789 #ifdef _LP64
790 __ movslq(rdx_temp, vmarg1); // Load sign-extended
791 __ movq(vmarg1, rdx_temp); // Store into first slot
792 #else
793 __ movl(rdx_temp, vmarg1);
794 __ sarl(rdx_temp, BitsPerInt - 1); // __ extend_sign()
795 __ movl(vmarg2, rdx_temp); // store second word
796 #endif
797 }
798 break;
799 case _adapter_opt_unboxl:
800 {
801 // Load the value up from the heap.
802 __ movptr(rdx_temp, vmarg1);
803 int value_offset = java_lang_boxing_object::value_offset_in_bytes(T_LONG);
804 assert(value_offset == java_lang_boxing_object::value_offset_in_bytes(T_DOUBLE), "");
805 __ null_check(rdx_temp, value_offset);
806 #ifdef _LP64
807 __ movq(rbx_temp, Address(rdx_temp, value_offset));
808 __ movq(vmarg1, rbx_temp);
809 #else
810 __ movl(rbx_temp, Address(rdx_temp, value_offset + 0*BytesPerInt));
811 __ movl(rdx_temp, Address(rdx_temp, value_offset + 1*BytesPerInt));
812 __ movl(vmarg1, rbx_temp);
813 __ movl(vmarg2, rdx_temp);
814 #endif
815 }
816 break;
817 default:
818 ShouldNotReachHere();
819 }
820
821 __ movptr(rcx_recv, rcx_mh_vmtarget);
822 __ jump_to_method_handle_entry(rcx_recv, rdx_temp);
823 }
824 break;
825
826 case _adapter_opt_f2d: // optimized subcase of adapt_prim_to_prim
827 case _adapter_opt_d2f: // optimized subcase of adapt_prim_to_prim
828 {
829 // perform an in-place floating primitive conversion
830 __ movl(rax_argslot, rcx_amh_vmargslot);
831 __ lea(rax_argslot, __ argument_address(rax_argslot, 1));
832 if (ek == _adapter_opt_f2d) {
833 insert_arg_slots(_masm, stack_move_unit(), _INSERT_INT_MASK,
834 rax_argslot, rbx_temp, rdx_temp);
835 }
836 Address vmarg(rax_argslot, -Interpreter::stackElementSize);
837
838 #ifdef _LP64
839 if (ek == _adapter_opt_f2d) {
840 __ movflt(xmm0, vmarg);
841 __ cvtss2sd(xmm0, xmm0);
842 __ movdbl(vmarg, xmm0);
843 } else {
844 __ movdbl(xmm0, vmarg);
845 __ cvtsd2ss(xmm0, xmm0);
846 __ movflt(vmarg, xmm0);
847 }
848 #else //_LP64
849 if (ek == _adapter_opt_f2d) {
850 __ fld_s(vmarg); // load float to ST0
851 __ fstp_s(vmarg); // store single
852 } else {
853 __ fld_d(vmarg); // load double to ST0
854 __ fstp_s(vmarg); // store single
855 }
856 #endif //_LP64
857
858 if (ek == _adapter_opt_d2f) {
859 remove_arg_slots(_masm, -stack_move_unit(),
860 rax_argslot, rbx_temp, rdx_temp);
861 }
862
863 __ movptr(rcx_recv, rcx_mh_vmtarget);
864 __ jump_to_method_handle_entry(rcx_recv, rdx_temp);
865 }
866 break;
867
868 case _adapter_prim_to_ref:
869 __ unimplemented(entry_name(ek)); // %%% FIXME: NYI
870 break;
871
872 case _adapter_swap_args:
873 case _adapter_rot_args:
874 // handled completely by optimized cases
875 __ stop("init_AdapterMethodHandle should not issue this");
876 break;
877
878 case _adapter_opt_swap_1:
879 case _adapter_opt_swap_2:
880 case _adapter_opt_rot_1_up:
881 case _adapter_opt_rot_1_down:
882 case _adapter_opt_rot_2_up:
883 case _adapter_opt_rot_2_down:
884 {
885 int swap_bytes = 0, rotate = 0;
886 get_ek_adapter_opt_swap_rot_info(ek, swap_bytes, rotate);
887
888 // 'argslot' is the position of the first argument to swap
889 __ movl(rax_argslot, rcx_amh_vmargslot);
890 __ lea(rax_argslot, __ argument_address(rax_argslot));
891
892 // 'vminfo' is the second
893 Register rbx_destslot = rbx_temp;
894 __ movl(rbx_destslot, rcx_amh_conversion);
895 assert(CONV_VMINFO_SHIFT == 0, "preshifted");
896 __ andl(rbx_destslot, CONV_VMINFO_MASK);
897 __ lea(rbx_destslot, __ argument_address(rbx_destslot));
898 DEBUG_ONLY(verify_argslot(_masm, rbx_destslot, "swap point must fall within current frame"));
899
900 if (!rotate) {
901 for (int i = 0; i < swap_bytes; i += wordSize) {
902 __ movptr(rdx_temp, Address(rax_argslot , i));
903 __ push(rdx_temp);
904 __ movptr(rdx_temp, Address(rbx_destslot, i));
905 __ movptr(Address(rax_argslot, i), rdx_temp);
906 __ pop(rdx_temp);
907 __ movptr(Address(rbx_destslot, i), rdx_temp);
908 }
909 } else {
910 // push the first chunk, which is going to get overwritten
911 for (int i = swap_bytes; (i -= wordSize) >= 0; ) {
912 __ movptr(rdx_temp, Address(rax_argslot, i));
913 __ push(rdx_temp);
914 }
915
916 if (rotate > 0) {
917 // rotate upward
918 __ subptr(rax_argslot, swap_bytes);
919 #ifdef ASSERT
920 {
921 // Verify that argslot > destslot, by at least swap_bytes.
922 Label L_ok;
923 __ cmpptr(rax_argslot, rbx_destslot);
924 __ jccb(Assembler::aboveEqual, L_ok);
925 __ stop("source must be above destination (upward rotation)");
926 __ bind(L_ok);
927 }
928 #endif
929 // work argslot down to destslot, copying contiguous data upwards
930 // pseudo-code:
931 // rax = src_addr - swap_bytes
932 // rbx = dest_addr
933 // while (rax >= rbx) *(rax + swap_bytes) = *(rax + 0), rax--;
934 Label loop;
935 __ bind(loop);
936 __ movptr(rdx_temp, Address(rax_argslot, 0));
937 __ movptr(Address(rax_argslot, swap_bytes), rdx_temp);
938 __ addptr(rax_argslot, -wordSize);
939 __ cmpptr(rax_argslot, rbx_destslot);
940 __ jccb(Assembler::aboveEqual, loop);
941 } else {
942 __ addptr(rax_argslot, swap_bytes);
943 #ifdef ASSERT
944 {
945 // Verify that argslot < destslot, by at least swap_bytes.
946 Label L_ok;
947 __ cmpptr(rax_argslot, rbx_destslot);
948 __ jccb(Assembler::belowEqual, L_ok);
949 __ stop("source must be below destination (downward rotation)");
950 __ bind(L_ok);
951 }
952 #endif
953 // work argslot up to destslot, copying contiguous data downwards
954 // pseudo-code:
955 // rax = src_addr + swap_bytes
956 // rbx = dest_addr
957 // while (rax <= rbx) *(rax - swap_bytes) = *(rax + 0), rax++;
958 Label loop;
959 __ bind(loop);
960 __ movptr(rdx_temp, Address(rax_argslot, 0));
961 __ movptr(Address(rax_argslot, -swap_bytes), rdx_temp);
962 __ addptr(rax_argslot, wordSize);
963 __ cmpptr(rax_argslot, rbx_destslot);
964 __ jccb(Assembler::belowEqual, loop);
965 }
966
967 // pop the original first chunk into the destination slot, now free
968 for (int i = 0; i < swap_bytes; i += wordSize) {
969 __ pop(rdx_temp);
970 __ movptr(Address(rbx_destslot, i), rdx_temp);
971 }
972 }
973
974 __ movptr(rcx_recv, rcx_mh_vmtarget);
975 __ jump_to_method_handle_entry(rcx_recv, rdx_temp);
976 }
977 break;
978
979 case _adapter_dup_args:
980 {
981 // 'argslot' is the position of the first argument to duplicate
982 __ movl(rax_argslot, rcx_amh_vmargslot);
983 __ lea(rax_argslot, __ argument_address(rax_argslot));
984
985 // 'stack_move' is negative number of words to duplicate
986 Register rdx_stack_move = rdx_temp;
987 __ movl2ptr(rdx_stack_move, rcx_amh_conversion);
988 __ sarptr(rdx_stack_move, CONV_STACK_MOVE_SHIFT);
989
990 int argslot0_num = 0;
991 Address argslot0 = __ argument_address(RegisterOrConstant(argslot0_num));
992 assert(argslot0.base() == rsp, "");
993 int pre_arg_size = argslot0.disp();
994 assert(pre_arg_size % wordSize == 0, "");
995 assert(pre_arg_size > 0, "must include PC");
996
997 // remember the old rsp+1 (argslot[0])
998 Register rbx_oldarg = rbx_temp;
999 __ lea(rbx_oldarg, argslot0);
1000
1001 // move rsp down to make room for dups
1002 __ lea(rsp, Address(rsp, rdx_stack_move, Address::times_ptr));
1003
1004 // compute the new rsp+1 (argslot[0])
1005 Register rdx_newarg = rdx_temp;
1006 __ lea(rdx_newarg, argslot0);
1007
1008 __ push(rdi); // need a temp
1009 // (preceding push must be done after arg addresses are taken!)
1010
1011 // pull down the pre_arg_size data (PC)
1012 for (int i = -pre_arg_size; i < 0; i += wordSize) {
1013 __ movptr(rdi, Address(rbx_oldarg, i));
1014 __ movptr(Address(rdx_newarg, i), rdi);
1015 }
1016
1017 // copy from rax_argslot[0...] down to new_rsp[1...]
1018 // pseudo-code:
1019 // rbx = old_rsp+1
1020 // rdx = new_rsp+1
1021 // rax = argslot
1022 // while (rdx < rbx) *rdx++ = *rax++
1023 Label loop;
1024 __ bind(loop);
1025 __ movptr(rdi, Address(rax_argslot, 0));
1026 __ movptr(Address(rdx_newarg, 0), rdi);
1027 __ addptr(rax_argslot, wordSize);
1028 __ addptr(rdx_newarg, wordSize);
1029 __ cmpptr(rdx_newarg, rbx_oldarg);
1030 __ jccb(Assembler::less, loop);
1031
1032 __ pop(rdi); // restore temp
1033
1034 __ movptr(rcx_recv, rcx_mh_vmtarget);
1035 __ jump_to_method_handle_entry(rcx_recv, rdx_temp);
1036 }
1037 break;
1038
1039 case _adapter_drop_args:
1040 {
1041 // 'argslot' is the position of the first argument to nuke
1042 __ movl(rax_argslot, rcx_amh_vmargslot);
1043 __ lea(rax_argslot, __ argument_address(rax_argslot));
1044
1045 __ push(rdi); // need a temp
1046 // (must do previous push after argslot address is taken)
1047
1048 // 'stack_move' is number of words to drop
1049 Register rdi_stack_move = rdi;
1050 __ movl2ptr(rdi_stack_move, rcx_amh_conversion);
1051 __ sarptr(rdi_stack_move, CONV_STACK_MOVE_SHIFT);
1052 remove_arg_slots(_masm, rdi_stack_move,
1053 rax_argslot, rbx_temp, rdx_temp);
1054
1055 __ pop(rdi); // restore temp
1056
1057 __ movptr(rcx_recv, rcx_mh_vmtarget);
1058 __ jump_to_method_handle_entry(rcx_recv, rdx_temp);
1059 }
1060 break;
1061
1062 case _adapter_collect_args:
1063 __ unimplemented(entry_name(ek)); // %%% FIXME: NYI
1064 break;
1065
1066 case _adapter_spread_args:
1067 // handled completely by optimized cases
1068 __ stop("init_AdapterMethodHandle should not issue this");
1069 break;
1070
1071 case _adapter_opt_spread_0:
1072 case _adapter_opt_spread_1:
1073 case _adapter_opt_spread_more:
1074 {
1075 // spread an array out into a group of arguments
1076 int length_constant = get_ek_adapter_opt_spread_info(ek);
1077
1078 // find the address of the array argument
1079 __ movl(rax_argslot, rcx_amh_vmargslot);
1080 __ lea(rax_argslot, __ argument_address(rax_argslot));
1081
1082 // grab some temps
1083 { __ push(rsi); __ push(rdi); }
1084 // (preceding pushes must be done after argslot address is taken!)
1085 #define UNPUSH_RSI_RDI \
1086 { __ pop(rdi); __ pop(rsi); }
1087
1088 // arx_argslot points both to the array and to the first output arg
1089 vmarg = Address(rax_argslot, 0);
1090
1091 // Get the array value.
1092 Register rsi_array = rsi;
1093 Register rdx_array_klass = rdx_temp;
1094 BasicType elem_type = T_OBJECT;
1095 int length_offset = arrayOopDesc::length_offset_in_bytes();
1096 int elem0_offset = arrayOopDesc::base_offset_in_bytes(elem_type);
1097 __ movptr(rsi_array, vmarg);
1098 Label skip_array_check;
1099 if (length_constant == 0) {
1100 __ testptr(rsi_array, rsi_array);
1101 __ jcc(Assembler::zero, skip_array_check);
1102 }
1103 __ null_check(rsi_array, oopDesc::klass_offset_in_bytes());
1104 __ load_klass(rdx_array_klass, rsi_array);
1105
1106 // Check the array type.
1107 Register rbx_klass = rbx_temp;
1108 __ movptr(rbx_klass, rcx_amh_argument); // this is a Class object!
1109 __ movptr(rbx_klass, Address(rbx_klass, java_lang_Class::klass_offset_in_bytes()));
1110
1111 Label ok_array_klass, bad_array_klass, bad_array_length;
1112 __ check_klass_subtype(rdx_array_klass, rbx_klass, rdi, ok_array_klass);
1113 // If we get here, the type check failed!
1114 __ jmp(bad_array_klass);
1115 __ bind(ok_array_klass);
1116
1117 // Check length.
1118 if (length_constant >= 0) {
1119 __ cmpl(Address(rsi_array, length_offset), length_constant);
1120 } else {
1121 Register rbx_vminfo = rbx_temp;
1122 __ movl(rbx_vminfo, rcx_amh_conversion);
1123 assert(CONV_VMINFO_SHIFT == 0, "preshifted");
1124 __ andl(rbx_vminfo, CONV_VMINFO_MASK);
1125 __ cmpl(rbx_vminfo, Address(rsi_array, length_offset));
1126 }
1127 __ jcc(Assembler::notEqual, bad_array_length);
1128
1129 Register rdx_argslot_limit = rdx_temp;
1130
1131 // Array length checks out. Now insert any required stack slots.
1132 if (length_constant == -1) {
1133 // Form a pointer to the end of the affected region.
1134 __ lea(rdx_argslot_limit, Address(rax_argslot, Interpreter::stackElementSize));
1135 // 'stack_move' is negative number of words to insert
1136 Register rdi_stack_move = rdi;
1137 __ movl2ptr(rdi_stack_move, rcx_amh_conversion);
1138 __ sarptr(rdi_stack_move, CONV_STACK_MOVE_SHIFT);
1139 Register rsi_temp = rsi_array; // spill this
1140 insert_arg_slots(_masm, rdi_stack_move, -1,
1141 rax_argslot, rbx_temp, rsi_temp);
1142 // reload the array (since rsi was killed)
1143 __ movptr(rsi_array, vmarg);
1144 } else if (length_constant > 1) {
1145 int arg_mask = 0;
1146 int new_slots = (length_constant - 1);
1147 for (int i = 0; i < new_slots; i++) {
1148 arg_mask <<= 1;
1149 arg_mask |= _INSERT_REF_MASK;
1150 }
1151 insert_arg_slots(_masm, new_slots * stack_move_unit(), arg_mask,
1152 rax_argslot, rbx_temp, rdx_temp);
1153 } else if (length_constant == 1) {
1154 // no stack resizing required
1155 } else if (length_constant == 0) {
1156 remove_arg_slots(_masm, -stack_move_unit(),
1157 rax_argslot, rbx_temp, rdx_temp);
1158 }
1159
1160 // Copy from the array to the new slots.
1161 // Note: Stack change code preserves integrity of rax_argslot pointer.
1162 // So even after slot insertions, rax_argslot still points to first argument.
1163 if (length_constant == -1) {
1164 // [rax_argslot, rdx_argslot_limit) is the area we are inserting into.
1165 Register rsi_source = rsi_array;
1166 __ lea(rsi_source, Address(rsi_array, elem0_offset));
1167 Label loop;
1168 __ bind(loop);
1169 __ movptr(rbx_temp, Address(rsi_source, 0));
1170 __ movptr(Address(rax_argslot, 0), rbx_temp);
1171 __ addptr(rsi_source, type2aelembytes(elem_type));
1172 __ addptr(rax_argslot, Interpreter::stackElementSize);
1173 __ cmpptr(rax_argslot, rdx_argslot_limit);
1174 __ jccb(Assembler::less, loop);
1175 } else if (length_constant == 0) {
1176 __ bind(skip_array_check);
1177 // nothing to copy
1178 } else {
1179 int elem_offset = elem0_offset;
1180 int slot_offset = 0;
1181 for (int index = 0; index < length_constant; index++) {
1182 __ movptr(rbx_temp, Address(rsi_array, elem_offset));
1183 __ movptr(Address(rax_argslot, slot_offset), rbx_temp);
1184 elem_offset += type2aelembytes(elem_type);
1185 slot_offset += Interpreter::stackElementSize;
1186 }
1187 }
1188
1189 // Arguments are spread. Move to next method handle.
1190 UNPUSH_RSI_RDI;
1191 __ movptr(rcx_recv, rcx_mh_vmtarget);
1192 __ jump_to_method_handle_entry(rcx_recv, rdx_temp);
1193
1194 __ bind(bad_array_klass);
1195 UNPUSH_RSI_RDI;
1196 __ pushptr(Address(rdx_array_klass, java_mirror_offset)); // required type
1197 __ pushptr(vmarg); // bad array
1198 __ push((int)Bytecodes::_aaload); // who is complaining?
1199 __ jump(ExternalAddress(from_interpreted_entry(_raise_exception)));
1200
1201 __ bind(bad_array_length);
1202 UNPUSH_RSI_RDI;
1203 __ push(rcx_recv); // AMH requiring a certain length
1204 __ pushptr(vmarg); // bad array
1205 __ push((int)Bytecodes::_arraylength); // who is complaining?
1206 __ jump(ExternalAddress(from_interpreted_entry(_raise_exception)));
1207
1208 #undef UNPUSH_RSI_RDI
1209 }
1210 break;
1211
1212 case _adapter_flyby:
1213 case _adapter_ricochet:
1214 __ unimplemented(entry_name(ek)); // %%% FIXME: NYI
1215 break;
1216
1217 default: ShouldNotReachHere();
1218 }
1219 __ hlt();
1220
1221 address me_cookie = MethodHandleEntry::start_compiled_entry(_masm, interp_entry);
1222 __ unimplemented(entry_name(ek)); // %%% FIXME: NYI
1223
1224 init_entry(ek, MethodHandleEntry::finish_compiled_entry(_masm, me_cookie));
1225 }