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 "incls/_precompiled.incl"
26 #include "incls/_methodHandles_x86.cpp.incl"
27
28 #define __ _masm->
29
30 #ifdef PRODUCT
31 #define BLOCK_COMMENT(str) /* nothing */
32 #else
33 #define BLOCK_COMMENT(str) __ block_comment(str)
34 #endif
35
36 #define BIND(label) bind(label); BLOCK_COMMENT(#label ":")
37
38 address MethodHandleEntry::start_compiled_entry(MacroAssembler* _masm,
39 address interpreted_entry) {
40 // Just before the actual machine code entry point, allocate space
41 // for a MethodHandleEntry::Data record, so that we can manage everything
42 // from one base pointer.
43 __ align(wordSize);
44 address target = __ pc() + sizeof(Data);
45 while (__ pc() < target) {
46 __ nop();
47 __ align(wordSize);
48 }
49
50 MethodHandleEntry* me = (MethodHandleEntry*) __ pc();
51 me->set_end_address(__ pc()); // set a temporary end_address
52 me->set_from_interpreted_entry(interpreted_entry);
53 me->set_type_checking_entry(NULL);
54
55 return (address) me;
56 }
57
58 MethodHandleEntry* MethodHandleEntry::finish_compiled_entry(MacroAssembler* _masm,
59 address start_addr) {
60 MethodHandleEntry* me = (MethodHandleEntry*) start_addr;
61 assert(me->end_address() == start_addr, "valid ME");
62
63 // Fill in the real end_address:
64 __ align(wordSize);
65 me->set_end_address(__ pc());
66
67 return me;
68 }
69
70 #ifdef ASSERT
71 static void verify_argslot(MacroAssembler* _masm, Register argslot_reg,
72 const char* error_message) {
73 // Verify that argslot lies within (rsp, rbp].
74 Label L_ok, L_bad;
75 BLOCK_COMMENT("{ verify_argslot");
76 __ cmpptr(argslot_reg, rbp);
77 __ jccb(Assembler::above, L_bad);
78 __ cmpptr(rsp, argslot_reg);
79 __ jccb(Assembler::below, L_ok);
80 __ bind(L_bad);
81 __ stop(error_message);
82 __ bind(L_ok);
83 BLOCK_COMMENT("} verify_argslot");
84 }
85 #endif
86
87
88 // Code generation
89 address MethodHandles::generate_method_handle_interpreter_entry(MacroAssembler* _masm) {
90 // rbx: methodOop
91 // rcx: receiver method handle (must load from sp[MethodTypeForm.vmslots])
92 // rsi/r13: sender SP (must preserve; see prepare_to_jump_from_interpreted)
93 // rdx, rdi: garbage temp, blown away
94
95 Register rbx_method = rbx;
96 Register rcx_recv = rcx;
97 Register rax_mtype = rax;
98 Register rdx_temp = rdx;
99 Register rdi_temp = rdi;
100
101 // emit WrongMethodType path first, to enable jccb back-branch from main path
102 Label wrong_method_type;
103 __ bind(wrong_method_type);
104 Label invoke_generic_slow_path;
105 assert(methodOopDesc::intrinsic_id_size_in_bytes() == sizeof(u1), "");;
106 __ cmpb(Address(rbx_method, methodOopDesc::intrinsic_id_offset_in_bytes()), (int) vmIntrinsics::_invokeExact);
107 __ jcc(Assembler::notEqual, invoke_generic_slow_path);
108 __ push(rax_mtype); // required mtype
109 __ push(rcx_recv); // bad mh (1st stacked argument)
110 __ jump(ExternalAddress(Interpreter::throw_WrongMethodType_entry()));
111
112 // here's where control starts out:
113 __ align(CodeEntryAlignment);
114 address entry_point = __ pc();
115
116 // fetch the MethodType from the method handle into rax (the 'check' register)
117 {
118 Register tem = rbx_method;
119 for (jint* pchase = methodOopDesc::method_type_offsets_chain(); (*pchase) != -1; pchase++) {
120 __ movptr(rax_mtype, Address(tem, *pchase));
121 tem = rax_mtype; // in case there is another indirection
122 }
123 }
124
125 // given the MethodType, find out where the MH argument is buried
126 __ load_heap_oop(rdx_temp, Address(rax_mtype, __ delayed_value(java_dyn_MethodType::form_offset_in_bytes, rdi_temp)));
127 Register rdx_vmslots = rdx_temp;
128 __ movl(rdx_vmslots, Address(rdx_temp, __ delayed_value(java_dyn_MethodTypeForm::vmslots_offset_in_bytes, rdi_temp)));
129 __ movptr(rcx_recv, __ argument_address(rdx_vmslots));
130
131 trace_method_handle(_masm, "invokeExact");
132
133 __ check_method_handle_type(rax_mtype, rcx_recv, rdi_temp, wrong_method_type);
134 __ jump_to_method_handle_entry(rcx_recv, rdi_temp);
135
136 // for invokeGeneric (only), apply argument and result conversions on the fly
137 __ bind(invoke_generic_slow_path);
138 #ifdef ASSERT
139 { Label L;
140 __ cmpb(Address(rbx_method, methodOopDesc::intrinsic_id_offset_in_bytes()), (int) vmIntrinsics::_invokeGeneric);
141 __ jcc(Assembler::equal, L);
142 __ stop("bad methodOop::intrinsic_id");
143 __ bind(L);
144 }
145 #endif //ASSERT
146 Register rbx_temp = rbx_method; // don't need it now
147
148 // make room on the stack for another pointer:
149 Register rcx_argslot = rcx_recv;
150 __ lea(rcx_argslot, __ argument_address(rdx_vmslots, 1));
151 insert_arg_slots(_masm, 2 * stack_move_unit(), _INSERT_REF_MASK,
152 rcx_argslot, rbx_temp, rdx_temp);
153
154 // load up an adapter from the calling type (Java weaves this)
155 __ load_heap_oop(rdx_temp, Address(rax_mtype, __ delayed_value(java_dyn_MethodType::form_offset_in_bytes, rdi_temp)));
156 Register rdx_adapter = rdx_temp;
157 // __ load_heap_oop(rdx_adapter, Address(rdx_temp, java_dyn_MethodTypeForm::genericInvoker_offset_in_bytes()));
158 // deal with old JDK versions:
159 __ lea(rdi_temp, Address(rdx_temp, __ delayed_value(java_dyn_MethodTypeForm::genericInvoker_offset_in_bytes, rdi_temp)));
160 __ cmpptr(rdi_temp, rdx_temp);
161 Label sorry_no_invoke_generic;
162 __ jcc(Assembler::below, sorry_no_invoke_generic);
163
164 __ load_heap_oop(rdx_adapter, Address(rdi_temp, 0));
165 __ testptr(rdx_adapter, rdx_adapter);
166 __ jcc(Assembler::zero, sorry_no_invoke_generic);
167 __ movptr(Address(rcx_argslot, 1 * Interpreter::stackElementSize), rdx_adapter);
168 // As a trusted first argument, pass the type being called, so the adapter knows
169 // the actual types of the arguments and return values.
170 // (Generic invokers are shared among form-families of method-type.)
171 __ movptr(Address(rcx_argslot, 0 * Interpreter::stackElementSize), rax_mtype);
172 // FIXME: assert that rdx_adapter is of the right method-type.
173 __ mov(rcx, rdx_adapter);
174 trace_method_handle(_masm, "invokeGeneric");
175 __ jump_to_method_handle_entry(rcx, rdi_temp);
176
177 __ bind(sorry_no_invoke_generic); // no invokeGeneric implementation available!
178 __ movptr(rcx_recv, Address(rcx_argslot, -1 * Interpreter::stackElementSize)); // recover original MH
179 __ push(rax_mtype); // required mtype
180 __ push(rcx_recv); // bad mh (1st stacked argument)
181 __ jump(ExternalAddress(Interpreter::throw_WrongMethodType_entry()));
182
183 return entry_point;
184 }
185
186 // Helper to insert argument slots into the stack.
187 // arg_slots must be a multiple of stack_move_unit() and <= 0
188 void MethodHandles::insert_arg_slots(MacroAssembler* _masm,
189 RegisterOrConstant arg_slots,
190 int arg_mask,
191 Register rax_argslot,
192 Register rbx_temp, Register rdx_temp, Register temp3_reg) {
193 assert(temp3_reg == noreg, "temp3 not required");
194 assert_different_registers(rax_argslot, rbx_temp, rdx_temp,
195 (!arg_slots.is_register() ? rsp : arg_slots.as_register()));
196
197 #ifdef ASSERT
198 verify_argslot(_masm, rax_argslot, "insertion point must fall within current frame");
199 if (arg_slots.is_register()) {
200 Label L_ok, L_bad;
201 __ cmpptr(arg_slots.as_register(), (int32_t) NULL_WORD);
202 __ jccb(Assembler::greater, L_bad);
203 __ testl(arg_slots.as_register(), -stack_move_unit() - 1);
204 __ jccb(Assembler::zero, L_ok);
205 __ bind(L_bad);
206 __ stop("assert arg_slots <= 0 and clear low bits");
207 __ bind(L_ok);
208 } else {
209 assert(arg_slots.as_constant() <= 0, "");
210 assert(arg_slots.as_constant() % -stack_move_unit() == 0, "");
211 }
212 #endif //ASSERT
213
214 #ifdef _LP64
215 if (arg_slots.is_register()) {
216 // clean high bits of stack motion register (was loaded as an int)
217 __ movslq(arg_slots.as_register(), arg_slots.as_register());
218 }
219 #endif
220
221 // Make space on the stack for the inserted argument(s).
222 // Then pull down everything shallower than rax_argslot.
223 // The stacked return address gets pulled down with everything else.
224 // That is, copy [rsp, argslot) downward by -size words. In pseudo-code:
225 // rsp -= size;
226 // for (rdx = rsp + size; rdx < argslot; rdx++)
227 // rdx[-size] = rdx[0]
228 // argslot -= size;
229 BLOCK_COMMENT("insert_arg_slots {");
230 __ mov(rdx_temp, rsp); // source pointer for copy
231 __ lea(rsp, Address(rsp, arg_slots, Address::times_ptr));
232 {
233 Label loop;
234 __ BIND(loop);
235 // pull one word down each time through the loop
236 __ movptr(rbx_temp, Address(rdx_temp, 0));
237 __ movptr(Address(rdx_temp, arg_slots, Address::times_ptr), rbx_temp);
238 __ addptr(rdx_temp, wordSize);
239 __ cmpptr(rdx_temp, rax_argslot);
240 __ jccb(Assembler::less, loop);
241 }
242
243 // Now move the argslot down, to point to the opened-up space.
244 __ lea(rax_argslot, Address(rax_argslot, arg_slots, Address::times_ptr));
245 BLOCK_COMMENT("} insert_arg_slots");
246 }
247
248 // Helper to remove argument slots from the stack.
249 // arg_slots must be a multiple of stack_move_unit() and >= 0
250 void MethodHandles::remove_arg_slots(MacroAssembler* _masm,
251 RegisterOrConstant arg_slots,
252 Register rax_argslot,
253 Register rbx_temp, Register rdx_temp, Register temp3_reg) {
254 assert(temp3_reg == noreg, "temp3 not required");
255 assert_different_registers(rax_argslot, rbx_temp, rdx_temp,
256 (!arg_slots.is_register() ? rsp : arg_slots.as_register()));
257
258 #ifdef ASSERT
259 // Verify that [argslot..argslot+size) lies within (rsp, rbp).
260 __ lea(rbx_temp, Address(rax_argslot, arg_slots, Address::times_ptr));
261 verify_argslot(_masm, rbx_temp, "deleted argument(s) must fall within current frame");
262 if (arg_slots.is_register()) {
263 Label L_ok, L_bad;
264 __ cmpptr(arg_slots.as_register(), (int32_t) NULL_WORD);
265 __ jccb(Assembler::less, L_bad);
266 __ testl(arg_slots.as_register(), -stack_move_unit() - 1);
267 __ jccb(Assembler::zero, L_ok);
268 __ bind(L_bad);
269 __ stop("assert arg_slots >= 0 and clear low bits");
270 __ bind(L_ok);
271 } else {
272 assert(arg_slots.as_constant() >= 0, "");
273 assert(arg_slots.as_constant() % -stack_move_unit() == 0, "");
274 }
275 #endif //ASSERT
276
277 #ifdef _LP64
278 if (false) { // not needed, since register is positive
279 // clean high bits of stack motion register (was loaded as an int)
280 if (arg_slots.is_register())
281 __ movslq(arg_slots.as_register(), arg_slots.as_register());
282 }
283 #endif
284
285 BLOCK_COMMENT("remove_arg_slots {");
286 // Pull up everything shallower than rax_argslot.
287 // Then remove the excess space on the stack.
288 // The stacked return address gets pulled up with everything else.
289 // That is, copy [rsp, argslot) upward by size words. In pseudo-code:
290 // for (rdx = argslot-1; rdx >= rsp; --rdx)
291 // rdx[size] = rdx[0]
292 // argslot += size;
293 // rsp += size;
294 __ lea(rdx_temp, Address(rax_argslot, -wordSize)); // source pointer for copy
295 {
296 Label loop;
297 __ BIND(loop);
298 // pull one word up each time through the loop
299 __ movptr(rbx_temp, Address(rdx_temp, 0));
300 __ movptr(Address(rdx_temp, arg_slots, Address::times_ptr), rbx_temp);
301 __ addptr(rdx_temp, -wordSize);
302 __ cmpptr(rdx_temp, rsp);
303 __ jccb(Assembler::greaterEqual, loop);
304 }
305
306 // Now move the argslot up, to point to the just-copied block.
307 __ lea(rsp, Address(rsp, arg_slots, Address::times_ptr));
308 // And adjust the argslot address to point at the deletion point.
309 __ lea(rax_argslot, Address(rax_argslot, arg_slots, Address::times_ptr));
310 BLOCK_COMMENT("} remove_arg_slots");
311 }
312
313 #ifndef PRODUCT
314 extern "C" void print_method_handle(oop mh);
315 void trace_method_handle_stub(const char* adaptername,
316 oop mh,
317 intptr_t* saved_regs,
318 intptr_t* entry_sp,
319 intptr_t* saved_sp,
320 intptr_t* saved_bp) {
321 // called as a leaf from native code: do not block the JVM!
322 intptr_t* last_sp = (intptr_t*) saved_bp[frame::interpreter_frame_last_sp_offset];
323 intptr_t* base_sp = (intptr_t*) saved_bp[frame::interpreter_frame_monitor_block_top_offset];
324 printf("MH %s mh="INTPTR_FORMAT" sp=("INTPTR_FORMAT"+"INTX_FORMAT") stack_size="INTX_FORMAT" bp="INTPTR_FORMAT"\n",
325 adaptername, (intptr_t)mh, (intptr_t)entry_sp, (intptr_t)(saved_sp - entry_sp), (intptr_t)(base_sp - last_sp), (intptr_t)saved_bp);
326 if (last_sp != saved_sp && last_sp != NULL)
327 printf("*** last_sp="INTPTR_FORMAT"\n", (intptr_t)last_sp);
328 if (Verbose) {
329 printf(" reg dump: ");
330 int saved_regs_count = (entry_sp-1) - saved_regs;
331 // 32 bit: rdi rsi rbp rsp; rbx rdx rcx (*) rax
332 int i;
333 for (i = 0; i <= saved_regs_count; i++) {
334 if (i > 0 && i % 4 == 0 && i != saved_regs_count)
335 printf("\n + dump: ");
336 printf(" %d: "INTPTR_FORMAT, i, saved_regs[i]);
337 }
338 printf("\n");
339 int stack_dump_count = 16;
340 if (stack_dump_count < (int)(saved_bp + 2 - saved_sp))
341 stack_dump_count = (int)(saved_bp + 2 - saved_sp);
342 if (stack_dump_count > 64) stack_dump_count = 48;
343 for (i = 0; i < stack_dump_count; i += 4) {
344 printf(" dump at SP[%d] "INTPTR_FORMAT": "INTPTR_FORMAT" "INTPTR_FORMAT" "INTPTR_FORMAT" "INTPTR_FORMAT"\n",
345 i, (intptr_t) &entry_sp[i+0], entry_sp[i+0], entry_sp[i+1], entry_sp[i+2], entry_sp[i+3]);
346 }
347 print_method_handle(mh);
348 }
349 }
350 void MethodHandles::trace_method_handle(MacroAssembler* _masm, const char* adaptername) {
351 if (!TraceMethodHandles) return;
352 BLOCK_COMMENT("trace_method_handle {");
353 __ push(rax);
354 __ lea(rax, Address(rsp, wordSize*6)); // entry_sp
355 __ pusha();
356 // arguments:
357 __ push(rbp); // interpreter frame pointer
358 __ push(rsi); // saved_sp
359 __ push(rax); // entry_sp
360 __ push(rcx); // mh
361 __ push(rcx);
362 __ movptr(Address(rsp, 0), (intptr_t) adaptername);
363 __ call_VM_leaf(CAST_FROM_FN_PTR(address, trace_method_handle_stub), 5);
364 __ popa();
365 __ pop(rax);
366 BLOCK_COMMENT("} trace_method_handle");
367 }
368 #endif //PRODUCT
369
370 // which conversion op types are implemented here?
371 int MethodHandles::adapter_conversion_ops_supported_mask() {
372 return ((1<<sun_dyn_AdapterMethodHandle::OP_RETYPE_ONLY)
373 |(1<<sun_dyn_AdapterMethodHandle::OP_RETYPE_RAW)
374 |(1<<sun_dyn_AdapterMethodHandle::OP_CHECK_CAST)
375 |(1<<sun_dyn_AdapterMethodHandle::OP_PRIM_TO_PRIM)
376 |(1<<sun_dyn_AdapterMethodHandle::OP_REF_TO_PRIM)
377 |(1<<sun_dyn_AdapterMethodHandle::OP_SWAP_ARGS)
378 |(1<<sun_dyn_AdapterMethodHandle::OP_ROT_ARGS)
379 |(1<<sun_dyn_AdapterMethodHandle::OP_DUP_ARGS)
380 |(1<<sun_dyn_AdapterMethodHandle::OP_DROP_ARGS)
381 //|(1<<sun_dyn_AdapterMethodHandle::OP_SPREAD_ARGS) //BUG!
382 );
383 // FIXME: MethodHandlesTest gets a crash if we enable OP_SPREAD_ARGS.
384 }
385
386 // Generate an "entry" field for a method handle.
387 // This determines how the method handle will respond to calls.
388 void MethodHandles::generate_method_handle_stub(MacroAssembler* _masm, MethodHandles::EntryKind ek) {
389 // Here is the register state during an interpreted call,
390 // as set up by generate_method_handle_interpreter_entry():
391 // - rbx: garbage temp (was MethodHandle.invoke methodOop, unused)
392 // - rcx: receiver method handle
393 // - rax: method handle type (only used by the check_mtype entry point)
394 // - rsi/r13: sender SP (must preserve; see prepare_to_jump_from_interpreted)
395 // - rdx: garbage temp, can blow away
396
397 Register rcx_recv = rcx;
398 Register rax_argslot = rax;
399 Register rbx_temp = rbx;
400 Register rdx_temp = rdx;
401
402 // This guy is set up by prepare_to_jump_from_interpreted (from interpreted calls)
403 // and gen_c2i_adapter (from compiled calls):
404 Register saved_last_sp = LP64_ONLY(r13) NOT_LP64(rsi);
405
406 guarantee(java_dyn_MethodHandle::vmentry_offset_in_bytes() != 0, "must have offsets");
407
408 // some handy addresses
409 Address rbx_method_fie( rbx, methodOopDesc::from_interpreted_offset() );
410
411 Address rcx_mh_vmtarget( rcx_recv, java_dyn_MethodHandle::vmtarget_offset_in_bytes() );
412 Address rcx_dmh_vmindex( rcx_recv, sun_dyn_DirectMethodHandle::vmindex_offset_in_bytes() );
413
414 Address rcx_bmh_vmargslot( rcx_recv, sun_dyn_BoundMethodHandle::vmargslot_offset_in_bytes() );
415 Address rcx_bmh_argument( rcx_recv, sun_dyn_BoundMethodHandle::argument_offset_in_bytes() );
416
417 Address rcx_amh_vmargslot( rcx_recv, sun_dyn_AdapterMethodHandle::vmargslot_offset_in_bytes() );
418 Address rcx_amh_argument( rcx_recv, sun_dyn_AdapterMethodHandle::argument_offset_in_bytes() );
419 Address rcx_amh_conversion( rcx_recv, sun_dyn_AdapterMethodHandle::conversion_offset_in_bytes() );
420 Address vmarg; // __ argument_address(vmargslot)
421
422 const int java_mirror_offset = klassOopDesc::klass_part_offset_in_bytes() + Klass::java_mirror_offset_in_bytes();
423
424 if (have_entry(ek)) {
425 __ nop(); // empty stubs make SG sick
426 return;
427 }
428
429 address interp_entry = __ pc();
430
431 trace_method_handle(_masm, entry_name(ek));
432
433 BLOCK_COMMENT(entry_name(ek));
434
435 switch ((int) ek) {
436 case _raise_exception:
437 {
438 // Not a real MH entry, but rather shared code for raising an exception.
439 // Extra local arguments are pushed on stack, as required type at TOS+8,
440 // failing object (or NULL) at TOS+4, failing bytecode type at TOS.
441 // Beyond those local arguments are the PC, of course.
442 Register rdx_code = rdx_temp;
443 Register rcx_fail = rcx_recv;
444 Register rax_want = rax_argslot;
445 Register rdi_pc = rdi;
446 __ pop(rdx_code); // TOS+0
447 __ pop(rcx_fail); // TOS+4
448 __ pop(rax_want); // TOS+8
449 __ pop(rdi_pc); // caller PC
450
451 __ mov(rsp, rsi); // cut the stack back to where the caller started
452
453 // Repush the arguments as if coming from the interpreter.
454 __ push(rdx_code);
455 __ push(rcx_fail);
456 __ push(rax_want);
457
458 Register rbx_method = rbx_temp;
459 Label no_method;
460 // FIXME: fill in _raise_exception_method with a suitable sun.dyn method
461 __ movptr(rbx_method, ExternalAddress((address) &_raise_exception_method));
462 __ testptr(rbx_method, rbx_method);
463 __ jccb(Assembler::zero, no_method);
464 int jobject_oop_offset = 0;
465 __ movptr(rbx_method, Address(rbx_method, jobject_oop_offset)); // dereference the jobject
466 __ testptr(rbx_method, rbx_method);
467 __ jccb(Assembler::zero, no_method);
468 __ verify_oop(rbx_method);
469 __ push(rdi_pc); // and restore caller PC
470 __ jmp(rbx_method_fie);
471
472 // If we get here, the Java runtime did not do its job of creating the exception.
473 // Do something that is at least causes a valid throw from the interpreter.
474 __ bind(no_method);
475 __ pop(rax_want);
476 __ pop(rcx_fail);
477 __ push(rax_want);
478 __ push(rcx_fail);
479 __ jump(ExternalAddress(Interpreter::throw_WrongMethodType_entry()));
480 }
481 break;
482
483 case _invokestatic_mh:
484 case _invokespecial_mh:
485 {
486 Register rbx_method = rbx_temp;
487 __ load_heap_oop(rbx_method, rcx_mh_vmtarget); // target is a methodOop
488 __ verify_oop(rbx_method);
489 // same as TemplateTable::invokestatic or invokespecial,
490 // minus the CP setup and profiling:
491 if (ek == _invokespecial_mh) {
492 // Must load & check the first argument before entering the target method.
493 __ load_method_handle_vmslots(rax_argslot, rcx_recv, rdx_temp);
494 __ movptr(rcx_recv, __ argument_address(rax_argslot, -1));
495 __ null_check(rcx_recv);
496 __ verify_oop(rcx_recv);
497 }
498 __ jmp(rbx_method_fie);
499 }
500 break;
501
502 case _invokevirtual_mh:
503 {
504 // same as TemplateTable::invokevirtual,
505 // minus the CP setup and profiling:
506
507 // pick out the vtable index and receiver offset from the MH,
508 // and then we can discard it:
509 __ load_method_handle_vmslots(rax_argslot, rcx_recv, rdx_temp);
510 Register rbx_index = rbx_temp;
511 __ movl(rbx_index, rcx_dmh_vmindex);
512 // Note: The verifier allows us to ignore rcx_mh_vmtarget.
513 __ movptr(rcx_recv, __ argument_address(rax_argslot, -1));
514 __ null_check(rcx_recv, oopDesc::klass_offset_in_bytes());
515
516 // get receiver klass
517 Register rax_klass = rax_argslot;
518 __ load_klass(rax_klass, rcx_recv);
519 __ verify_oop(rax_klass);
520
521 // get target methodOop & entry point
522 const int base = instanceKlass::vtable_start_offset() * wordSize;
523 assert(vtableEntry::size() * wordSize == wordSize, "adjust the scaling in the code below");
524 Address vtable_entry_addr(rax_klass,
525 rbx_index, Address::times_ptr,
526 base + vtableEntry::method_offset_in_bytes());
527 Register rbx_method = rbx_temp;
528 __ movptr(rbx_method, vtable_entry_addr);
529
530 __ verify_oop(rbx_method);
531 __ jmp(rbx_method_fie);
532 }
533 break;
534
535 case _invokeinterface_mh:
536 {
537 // same as TemplateTable::invokeinterface,
538 // minus the CP setup and profiling:
539
540 // pick out the interface and itable index from the MH.
541 __ load_method_handle_vmslots(rax_argslot, rcx_recv, rdx_temp);
542 Register rdx_intf = rdx_temp;
543 Register rbx_index = rbx_temp;
544 __ load_heap_oop(rdx_intf, rcx_mh_vmtarget);
545 __ movl(rbx_index, rcx_dmh_vmindex);
546 __ movptr(rcx_recv, __ argument_address(rax_argslot, -1));
547 __ null_check(rcx_recv, oopDesc::klass_offset_in_bytes());
548
549 // get receiver klass
550 Register rax_klass = rax_argslot;
551 __ load_klass(rax_klass, rcx_recv);
552 __ verify_oop(rax_klass);
553
554 Register rdi_temp = rdi;
555 Register rbx_method = rbx_index;
556
557 // get interface klass
558 Label no_such_interface;
559 __ verify_oop(rdx_intf);
560 __ lookup_interface_method(rax_klass, rdx_intf,
561 // note: next two args must be the same:
562 rbx_index, rbx_method,
563 rdi_temp,
564 no_such_interface);
565
566 __ verify_oop(rbx_method);
567 __ jmp(rbx_method_fie);
568 __ hlt();
569
570 __ bind(no_such_interface);
571 // Throw an exception.
572 // For historical reasons, it will be IncompatibleClassChangeError.
573 __ pushptr(Address(rdx_intf, java_mirror_offset)); // required interface
574 __ push(rcx_recv); // bad receiver
575 __ push((int)Bytecodes::_invokeinterface); // who is complaining?
576 __ jump(ExternalAddress(from_interpreted_entry(_raise_exception)));
577 }
578 break;
579
580 case _bound_ref_mh:
581 case _bound_int_mh:
582 case _bound_long_mh:
583 case _bound_ref_direct_mh:
584 case _bound_int_direct_mh:
585 case _bound_long_direct_mh:
586 {
587 bool direct_to_method = (ek >= _bound_ref_direct_mh);
588 BasicType arg_type = T_ILLEGAL;
589 int arg_mask = _INSERT_NO_MASK;
590 int arg_slots = -1;
591 get_ek_bound_mh_info(ek, arg_type, arg_mask, arg_slots);
592
593 // make room for the new argument:
594 __ movl(rax_argslot, rcx_bmh_vmargslot);
595 __ lea(rax_argslot, __ argument_address(rax_argslot));
596 insert_arg_slots(_masm, arg_slots * stack_move_unit(), arg_mask,
597 rax_argslot, rbx_temp, rdx_temp);
598
599 // store bound argument into the new stack slot:
600 __ load_heap_oop(rbx_temp, rcx_bmh_argument);
601 Address prim_value_addr(rbx_temp, java_lang_boxing_object::value_offset_in_bytes(arg_type));
602 if (arg_type == T_OBJECT) {
603 __ movptr(Address(rax_argslot, 0), rbx_temp);
604 } else {
605 __ load_sized_value(rdx_temp, prim_value_addr,
606 type2aelembytes(arg_type), is_signed_subword_type(arg_type));
607 __ movptr(Address(rax_argslot, 0), rdx_temp);
608 #ifndef _LP64
609 if (arg_slots == 2) {
610 __ movl(rdx_temp, prim_value_addr.plus_disp(wordSize));
611 __ movl(Address(rax_argslot, Interpreter::stackElementSize), rdx_temp);
612 }
613 #endif //_LP64
614 }
615
616 if (direct_to_method) {
617 Register rbx_method = rbx_temp;
618 __ load_heap_oop(rbx_method, rcx_mh_vmtarget);
619 __ verify_oop(rbx_method);
620 __ jmp(rbx_method_fie);
621 } else {
622 __ load_heap_oop(rcx_recv, rcx_mh_vmtarget);
623 __ verify_oop(rcx_recv);
624 __ jump_to_method_handle_entry(rcx_recv, rdx_temp);
625 }
626 }
627 break;
628
629 case _adapter_retype_only:
630 case _adapter_retype_raw:
631 // immediately jump to the next MH layer:
632 __ load_heap_oop(rcx_recv, rcx_mh_vmtarget);
633 __ verify_oop(rcx_recv);
634 __ jump_to_method_handle_entry(rcx_recv, rdx_temp);
635 // This is OK when all parameter types widen.
636 // It is also OK when a return type narrows.
637 break;
638
639 case _adapter_check_cast:
640 {
641 // temps:
642 Register rbx_klass = rbx_temp; // interesting AMH data
643
644 // check a reference argument before jumping to the next layer of MH:
645 __ movl(rax_argslot, rcx_amh_vmargslot);
646 vmarg = __ argument_address(rax_argslot);
647
648 // What class are we casting to?
649 __ load_heap_oop(rbx_klass, rcx_amh_argument); // this is a Class object!
650 __ load_heap_oop(rbx_klass, Address(rbx_klass, java_lang_Class::klass_offset_in_bytes()));
651
652 Label done;
653 __ movptr(rdx_temp, vmarg);
654 __ testptr(rdx_temp, rdx_temp);
655 __ jcc(Assembler::zero, done); // no cast if null
656 __ load_klass(rdx_temp, rdx_temp);
657
658 // live at this point:
659 // - rbx_klass: klass required by the target method
660 // - rdx_temp: argument klass to test
661 // - rcx_recv: adapter method handle
662 __ check_klass_subtype(rdx_temp, rbx_klass, rax_argslot, done);
663
664 // If we get here, the type check failed!
665 // Call the wrong_method_type stub, passing the failing argument type in rax.
666 Register rax_mtype = rax_argslot;
667 __ movl(rax_argslot, rcx_amh_vmargslot); // reload argslot field
668 __ movptr(rdx_temp, vmarg);
669
670 __ load_heap_oop(rbx_klass, rcx_amh_argument); // required class
671 __ push(rbx_klass);
672 __ push(rdx_temp); // bad object
673 __ push((int)Bytecodes::_checkcast); // who is complaining?
674 __ jump(ExternalAddress(from_interpreted_entry(_raise_exception)));
675
676 __ bind(done);
677 // get the new MH:
678 __ load_heap_oop(rcx_recv, rcx_mh_vmtarget);
679 __ jump_to_method_handle_entry(rcx_recv, rdx_temp);
680 }
681 break;
682
683 case _adapter_prim_to_prim:
684 case _adapter_ref_to_prim:
685 // handled completely by optimized cases
686 __ stop("init_AdapterMethodHandle should not issue this");
687 break;
688
689 case _adapter_opt_i2i: // optimized subcase of adapt_prim_to_prim
690 //case _adapter_opt_f2i: // optimized subcase of adapt_prim_to_prim
691 case _adapter_opt_l2i: // optimized subcase of adapt_prim_to_prim
692 case _adapter_opt_unboxi: // optimized subcase of adapt_ref_to_prim
693 {
694 // perform an in-place conversion to int or an int subword
695 __ movl(rax_argslot, rcx_amh_vmargslot);
696 vmarg = __ argument_address(rax_argslot);
697
698 switch (ek) {
699 case _adapter_opt_i2i:
700 __ movl(rdx_temp, vmarg);
701 break;
702 case _adapter_opt_l2i:
703 {
704 // just delete the extra slot; on a little-endian machine we keep the first
705 __ lea(rax_argslot, __ argument_address(rax_argslot, 1));
706 remove_arg_slots(_masm, -stack_move_unit(),
707 rax_argslot, rbx_temp, rdx_temp);
708 vmarg = Address(rax_argslot, -Interpreter::stackElementSize);
709 __ movl(rdx_temp, vmarg);
710 }
711 break;
712 case _adapter_opt_unboxi:
713 {
714 // Load the value up from the heap.
715 __ movptr(rdx_temp, vmarg);
716 int value_offset = java_lang_boxing_object::value_offset_in_bytes(T_INT);
717 #ifdef ASSERT
718 for (int bt = T_BOOLEAN; bt < T_INT; bt++) {
719 if (is_subword_type(BasicType(bt)))
720 assert(value_offset == java_lang_boxing_object::value_offset_in_bytes(BasicType(bt)), "");
721 }
722 #endif
723 __ null_check(rdx_temp, value_offset);
724 __ movl(rdx_temp, Address(rdx_temp, value_offset));
725 // We load this as a word. Because we are little-endian,
726 // the low bits will be correct, but the high bits may need cleaning.
727 // The vminfo will guide us to clean those bits.
728 }
729 break;
730 default:
731 ShouldNotReachHere();
732 }
733
734 // Do the requested conversion and store the value.
735 Register rbx_vminfo = rbx_temp;
736 __ movl(rbx_vminfo, rcx_amh_conversion);
737 assert(CONV_VMINFO_SHIFT == 0, "preshifted");
738
739 // get the new MH:
740 __ load_heap_oop(rcx_recv, rcx_mh_vmtarget);
741 // (now we are done with the old MH)
742
743 // original 32-bit vmdata word must be of this form:
744 // | MBZ:6 | signBitCount:8 | srcDstTypes:8 | conversionOp:8 |
745 __ xchgptr(rcx, rbx_vminfo); // free rcx for shifts
746 __ shll(rdx_temp /*, rcx*/);
747 Label zero_extend, done;
748 __ testl(rcx, CONV_VMINFO_SIGN_FLAG);
749 __ jccb(Assembler::zero, zero_extend);
750
751 // this path is taken for int->byte, int->short
752 __ sarl(rdx_temp /*, rcx*/);
753 __ jmpb(done);
754
755 __ bind(zero_extend);
756 // this is taken for int->char
757 __ shrl(rdx_temp /*, rcx*/);
758
759 __ bind(done);
760 __ movl(vmarg, rdx_temp); // Store the value.
761 __ xchgptr(rcx, rbx_vminfo); // restore rcx_recv
762
763 __ jump_to_method_handle_entry(rcx_recv, rdx_temp);
764 }
765 break;
766
767 case _adapter_opt_i2l: // optimized subcase of adapt_prim_to_prim
768 case _adapter_opt_unboxl: // optimized subcase of adapt_ref_to_prim
769 {
770 // perform an in-place int-to-long or ref-to-long conversion
771 __ movl(rax_argslot, rcx_amh_vmargslot);
772
773 // on a little-endian machine we keep the first slot and add another after
774 __ lea(rax_argslot, __ argument_address(rax_argslot, 1));
775 insert_arg_slots(_masm, stack_move_unit(), _INSERT_INT_MASK,
776 rax_argslot, rbx_temp, rdx_temp);
777 Address vmarg1(rax_argslot, -Interpreter::stackElementSize);
778 Address vmarg2 = vmarg1.plus_disp(Interpreter::stackElementSize);
779
780 switch (ek) {
781 case _adapter_opt_i2l:
782 {
783 #ifdef _LP64
784 __ movslq(rdx_temp, vmarg1); // Load sign-extended
785 __ movq(vmarg1, rdx_temp); // Store into first slot
786 #else
787 __ movl(rdx_temp, vmarg1);
788 __ sarl(rdx_temp, BitsPerInt - 1); // __ extend_sign()
789 __ movl(vmarg2, rdx_temp); // store second word
790 #endif
791 }
792 break;
793 case _adapter_opt_unboxl:
794 {
795 // Load the value up from the heap.
796 __ movptr(rdx_temp, vmarg1);
797 int value_offset = java_lang_boxing_object::value_offset_in_bytes(T_LONG);
798 assert(value_offset == java_lang_boxing_object::value_offset_in_bytes(T_DOUBLE), "");
799 __ null_check(rdx_temp, value_offset);
800 #ifdef _LP64
801 __ movq(rbx_temp, Address(rdx_temp, value_offset));
802 __ movq(vmarg1, rbx_temp);
803 #else
804 __ movl(rbx_temp, Address(rdx_temp, value_offset + 0*BytesPerInt));
805 __ movl(rdx_temp, Address(rdx_temp, value_offset + 1*BytesPerInt));
806 __ movl(vmarg1, rbx_temp);
807 __ movl(vmarg2, rdx_temp);
808 #endif
809 }
810 break;
811 default:
812 ShouldNotReachHere();
813 }
814
815 __ load_heap_oop(rcx_recv, rcx_mh_vmtarget);
816 __ jump_to_method_handle_entry(rcx_recv, rdx_temp);
817 }
818 break;
819
820 case _adapter_opt_f2d: // optimized subcase of adapt_prim_to_prim
821 case _adapter_opt_d2f: // optimized subcase of adapt_prim_to_prim
822 {
823 // perform an in-place floating primitive conversion
824 __ movl(rax_argslot, rcx_amh_vmargslot);
825 __ lea(rax_argslot, __ argument_address(rax_argslot, 1));
826 if (ek == _adapter_opt_f2d) {
827 insert_arg_slots(_masm, stack_move_unit(), _INSERT_INT_MASK,
828 rax_argslot, rbx_temp, rdx_temp);
829 }
830 Address vmarg(rax_argslot, -Interpreter::stackElementSize);
831
832 #ifdef _LP64
833 if (ek == _adapter_opt_f2d) {
834 __ movflt(xmm0, vmarg);
835 __ cvtss2sd(xmm0, xmm0);
836 __ movdbl(vmarg, xmm0);
837 } else {
838 __ movdbl(xmm0, vmarg);
839 __ cvtsd2ss(xmm0, xmm0);
840 __ movflt(vmarg, xmm0);
841 }
842 #else //_LP64
843 if (ek == _adapter_opt_f2d) {
844 __ fld_s(vmarg); // load float to ST0
845 __ fstp_s(vmarg); // store single
846 } else {
847 __ fld_d(vmarg); // load double to ST0
848 __ fstp_s(vmarg); // store single
849 }
850 #endif //_LP64
851
852 if (ek == _adapter_opt_d2f) {
853 remove_arg_slots(_masm, -stack_move_unit(),
854 rax_argslot, rbx_temp, rdx_temp);
855 }
856
857 __ load_heap_oop(rcx_recv, rcx_mh_vmtarget);
858 __ jump_to_method_handle_entry(rcx_recv, rdx_temp);
859 }
860 break;
861
862 case _adapter_prim_to_ref:
863 __ unimplemented(entry_name(ek)); // %%% FIXME: NYI
864 break;
865
866 case _adapter_swap_args:
867 case _adapter_rot_args:
868 // handled completely by optimized cases
869 __ stop("init_AdapterMethodHandle should not issue this");
870 break;
871
872 case _adapter_opt_swap_1:
873 case _adapter_opt_swap_2:
874 case _adapter_opt_rot_1_up:
875 case _adapter_opt_rot_1_down:
876 case _adapter_opt_rot_2_up:
877 case _adapter_opt_rot_2_down:
878 {
879 int swap_bytes = 0, rotate = 0;
880 get_ek_adapter_opt_swap_rot_info(ek, swap_bytes, rotate);
881
882 // 'argslot' is the position of the first argument to swap
883 __ movl(rax_argslot, rcx_amh_vmargslot);
884 __ lea(rax_argslot, __ argument_address(rax_argslot));
885
886 // 'vminfo' is the second
887 Register rbx_destslot = rbx_temp;
888 __ movl(rbx_destslot, rcx_amh_conversion);
889 assert(CONV_VMINFO_SHIFT == 0, "preshifted");
890 __ andl(rbx_destslot, CONV_VMINFO_MASK);
891 __ lea(rbx_destslot, __ argument_address(rbx_destslot));
892 DEBUG_ONLY(verify_argslot(_masm, rbx_destslot, "swap point must fall within current frame"));
893
894 if (!rotate) {
895 for (int i = 0; i < swap_bytes; i += wordSize) {
896 __ movptr(rdx_temp, Address(rax_argslot , i));
897 __ push(rdx_temp);
898 __ movptr(rdx_temp, Address(rbx_destslot, i));
899 __ movptr(Address(rax_argslot, i), rdx_temp);
900 __ pop(rdx_temp);
901 __ movptr(Address(rbx_destslot, i), rdx_temp);
902 }
903 } else {
904 // push the first chunk, which is going to get overwritten
905 for (int i = swap_bytes; (i -= wordSize) >= 0; ) {
906 __ movptr(rdx_temp, Address(rax_argslot, i));
907 __ push(rdx_temp);
908 }
909
910 if (rotate > 0) {
911 // rotate upward
912 __ subptr(rax_argslot, swap_bytes);
913 #ifdef ASSERT
914 {
915 // Verify that argslot > destslot, by at least swap_bytes.
916 Label L_ok;
917 __ cmpptr(rax_argslot, rbx_destslot);
918 __ jccb(Assembler::aboveEqual, L_ok);
919 __ stop("source must be above destination (upward rotation)");
920 __ bind(L_ok);
921 }
922 #endif
923 // work argslot down to destslot, copying contiguous data upwards
924 // pseudo-code:
925 // rax = src_addr - swap_bytes
926 // rbx = dest_addr
927 // while (rax >= rbx) *(rax + swap_bytes) = *(rax + 0), rax--;
928 Label loop;
929 __ bind(loop);
930 __ movptr(rdx_temp, Address(rax_argslot, 0));
931 __ movptr(Address(rax_argslot, swap_bytes), rdx_temp);
932 __ addptr(rax_argslot, -wordSize);
933 __ cmpptr(rax_argslot, rbx_destslot);
934 __ jccb(Assembler::aboveEqual, loop);
935 } else {
936 __ addptr(rax_argslot, swap_bytes);
937 #ifdef ASSERT
938 {
939 // Verify that argslot < destslot, by at least swap_bytes.
940 Label L_ok;
941 __ cmpptr(rax_argslot, rbx_destslot);
942 __ jccb(Assembler::belowEqual, L_ok);
943 __ stop("source must be below destination (downward rotation)");
944 __ bind(L_ok);
945 }
946 #endif
947 // work argslot up to destslot, copying contiguous data downwards
948 // pseudo-code:
949 // rax = src_addr + swap_bytes
950 // rbx = dest_addr
951 // while (rax <= rbx) *(rax - swap_bytes) = *(rax + 0), rax++;
952 Label loop;
953 __ bind(loop);
954 __ movptr(rdx_temp, Address(rax_argslot, 0));
955 __ movptr(Address(rax_argslot, -swap_bytes), rdx_temp);
956 __ addptr(rax_argslot, wordSize);
957 __ cmpptr(rax_argslot, rbx_destslot);
958 __ jccb(Assembler::belowEqual, loop);
959 }
960
961 // pop the original first chunk into the destination slot, now free
962 for (int i = 0; i < swap_bytes; i += wordSize) {
963 __ pop(rdx_temp);
964 __ movptr(Address(rbx_destslot, i), rdx_temp);
965 }
966 }
967
968 __ load_heap_oop(rcx_recv, rcx_mh_vmtarget);
969 __ jump_to_method_handle_entry(rcx_recv, rdx_temp);
970 }
971 break;
972
973 case _adapter_dup_args:
974 {
975 // 'argslot' is the position of the first argument to duplicate
976 __ movl(rax_argslot, rcx_amh_vmargslot);
977 __ lea(rax_argslot, __ argument_address(rax_argslot));
978
979 // 'stack_move' is negative number of words to duplicate
980 Register rdx_stack_move = rdx_temp;
981 __ movl2ptr(rdx_stack_move, rcx_amh_conversion);
982 __ sarptr(rdx_stack_move, CONV_STACK_MOVE_SHIFT);
983
984 int argslot0_num = 0;
985 Address argslot0 = __ argument_address(RegisterOrConstant(argslot0_num));
986 assert(argslot0.base() == rsp, "");
987 int pre_arg_size = argslot0.disp();
988 assert(pre_arg_size % wordSize == 0, "");
989 assert(pre_arg_size > 0, "must include PC");
990
991 // remember the old rsp+1 (argslot[0])
992 Register rbx_oldarg = rbx_temp;
993 __ lea(rbx_oldarg, argslot0);
994
995 // move rsp down to make room for dups
996 __ lea(rsp, Address(rsp, rdx_stack_move, Address::times_ptr));
997
998 // compute the new rsp+1 (argslot[0])
999 Register rdx_newarg = rdx_temp;
1000 __ lea(rdx_newarg, argslot0);
1001
1002 __ push(rdi); // need a temp
1003 // (preceding push must be done after arg addresses are taken!)
1004
1005 // pull down the pre_arg_size data (PC)
1006 for (int i = -pre_arg_size; i < 0; i += wordSize) {
1007 __ movptr(rdi, Address(rbx_oldarg, i));
1008 __ movptr(Address(rdx_newarg, i), rdi);
1009 }
1010
1011 // copy from rax_argslot[0...] down to new_rsp[1...]
1012 // pseudo-code:
1013 // rbx = old_rsp+1
1014 // rdx = new_rsp+1
1015 // rax = argslot
1016 // while (rdx < rbx) *rdx++ = *rax++
1017 Label loop;
1018 __ bind(loop);
1019 __ movptr(rdi, Address(rax_argslot, 0));
1020 __ movptr(Address(rdx_newarg, 0), rdi);
1021 __ addptr(rax_argslot, wordSize);
1022 __ addptr(rdx_newarg, wordSize);
1023 __ cmpptr(rdx_newarg, rbx_oldarg);
1024 __ jccb(Assembler::less, loop);
1025
1026 __ pop(rdi); // restore temp
1027
1028 __ load_heap_oop(rcx_recv, rcx_mh_vmtarget);
1029 __ jump_to_method_handle_entry(rcx_recv, rdx_temp);
1030 }
1031 break;
1032
1033 case _adapter_drop_args:
1034 {
1035 // 'argslot' is the position of the first argument to nuke
1036 __ movl(rax_argslot, rcx_amh_vmargslot);
1037 __ lea(rax_argslot, __ argument_address(rax_argslot));
1038
1039 __ push(rdi); // need a temp
1040 // (must do previous push after argslot address is taken)
1041
1042 // 'stack_move' is number of words to drop
1043 Register rdi_stack_move = rdi;
1044 __ movl2ptr(rdi_stack_move, rcx_amh_conversion);
1045 __ sarptr(rdi_stack_move, CONV_STACK_MOVE_SHIFT);
1046 remove_arg_slots(_masm, rdi_stack_move,
1047 rax_argslot, rbx_temp, rdx_temp);
1048
1049 __ pop(rdi); // restore temp
1050
1051 __ load_heap_oop(rcx_recv, rcx_mh_vmtarget);
1052 __ jump_to_method_handle_entry(rcx_recv, rdx_temp);
1053 }
1054 break;
1055
1056 case _adapter_collect_args:
1057 __ unimplemented(entry_name(ek)); // %%% FIXME: NYI
1058 break;
1059
1060 case _adapter_spread_args:
1061 // handled completely by optimized cases
1062 __ stop("init_AdapterMethodHandle should not issue this");
1063 break;
1064
1065 case _adapter_opt_spread_0:
1066 case _adapter_opt_spread_1:
1067 case _adapter_opt_spread_more:
1068 {
1069 // spread an array out into a group of arguments
1070 int length_constant = get_ek_adapter_opt_spread_info(ek);
1071
1072 // find the address of the array argument
1073 __ movl(rax_argslot, rcx_amh_vmargslot);
1074 __ lea(rax_argslot, __ argument_address(rax_argslot));
1075
1076 // grab some temps
1077 { __ push(rsi); __ push(rdi); }
1078 // (preceding pushes must be done after argslot address is taken!)
1079 #define UNPUSH_RSI_RDI \
1080 { __ pop(rdi); __ pop(rsi); }
1081
1082 // arx_argslot points both to the array and to the first output arg
1083 vmarg = Address(rax_argslot, 0);
1084
1085 // Get the array value.
1086 Register rsi_array = rsi;
1087 Register rdx_array_klass = rdx_temp;
1088 BasicType elem_type = T_OBJECT;
1089 int length_offset = arrayOopDesc::length_offset_in_bytes();
1090 int elem0_offset = arrayOopDesc::base_offset_in_bytes(elem_type);
1091 __ movptr(rsi_array, vmarg);
1092 Label skip_array_check;
1093 if (length_constant == 0) {
1094 __ testptr(rsi_array, rsi_array);
1095 __ jcc(Assembler::zero, skip_array_check);
1096 }
1097 __ null_check(rsi_array, oopDesc::klass_offset_in_bytes());
1098 __ load_klass(rdx_array_klass, rsi_array);
1099
1100 // Check the array type.
1101 Register rbx_klass = rbx_temp;
1102 __ load_heap_oop(rbx_klass, rcx_amh_argument); // this is a Class object!
1103 __ load_heap_oop(rbx_klass, Address(rbx_klass, java_lang_Class::klass_offset_in_bytes()));
1104
1105 Label ok_array_klass, bad_array_klass, bad_array_length;
1106 __ check_klass_subtype(rdx_array_klass, rbx_klass, rdi, ok_array_klass);
1107 // If we get here, the type check failed!
1108 __ jmp(bad_array_klass);
1109 __ bind(ok_array_klass);
1110
1111 // Check length.
1112 if (length_constant >= 0) {
1113 __ cmpl(Address(rsi_array, length_offset), length_constant);
1114 } else {
1115 Register rbx_vminfo = rbx_temp;
1116 __ movl(rbx_vminfo, rcx_amh_conversion);
1117 assert(CONV_VMINFO_SHIFT == 0, "preshifted");
1118 __ andl(rbx_vminfo, CONV_VMINFO_MASK);
1119 __ cmpl(rbx_vminfo, Address(rsi_array, length_offset));
1120 }
1121 __ jcc(Assembler::notEqual, bad_array_length);
1122
1123 Register rdx_argslot_limit = rdx_temp;
1124
1125 // Array length checks out. Now insert any required stack slots.
1126 if (length_constant == -1) {
1127 // Form a pointer to the end of the affected region.
1128 __ lea(rdx_argslot_limit, Address(rax_argslot, Interpreter::stackElementSize));
1129 // 'stack_move' is negative number of words to insert
1130 Register rdi_stack_move = rdi;
1131 __ movl2ptr(rdi_stack_move, rcx_amh_conversion);
1132 __ sarptr(rdi_stack_move, CONV_STACK_MOVE_SHIFT);
1133 Register rsi_temp = rsi_array; // spill this
1134 insert_arg_slots(_masm, rdi_stack_move, -1,
1135 rax_argslot, rbx_temp, rsi_temp);
1136 // reload the array (since rsi was killed)
1137 __ movptr(rsi_array, vmarg);
1138 } else if (length_constant > 1) {
1139 int arg_mask = 0;
1140 int new_slots = (length_constant - 1);
1141 for (int i = 0; i < new_slots; i++) {
1142 arg_mask <<= 1;
1143 arg_mask |= _INSERT_REF_MASK;
1144 }
1145 insert_arg_slots(_masm, new_slots * stack_move_unit(), arg_mask,
1146 rax_argslot, rbx_temp, rdx_temp);
1147 } else if (length_constant == 1) {
1148 // no stack resizing required
1149 } else if (length_constant == 0) {
1150 remove_arg_slots(_masm, -stack_move_unit(),
1151 rax_argslot, rbx_temp, rdx_temp);
1152 }
1153
1154 // Copy from the array to the new slots.
1155 // Note: Stack change code preserves integrity of rax_argslot pointer.
1156 // So even after slot insertions, rax_argslot still points to first argument.
1157 if (length_constant == -1) {
1158 // [rax_argslot, rdx_argslot_limit) is the area we are inserting into.
1159 Register rsi_source = rsi_array;
1160 __ lea(rsi_source, Address(rsi_array, elem0_offset));
1161 Label loop;
1162 __ bind(loop);
1163 __ movptr(rbx_temp, Address(rsi_source, 0));
1164 __ movptr(Address(rax_argslot, 0), rbx_temp);
1165 __ addptr(rsi_source, type2aelembytes(elem_type));
1166 __ addptr(rax_argslot, Interpreter::stackElementSize);
1167 __ cmpptr(rax_argslot, rdx_argslot_limit);
1168 __ jccb(Assembler::less, loop);
1169 } else if (length_constant == 0) {
1170 __ bind(skip_array_check);
1171 // nothing to copy
1172 } else {
1173 int elem_offset = elem0_offset;
1174 int slot_offset = 0;
1175 for (int index = 0; index < length_constant; index++) {
1176 __ movptr(rbx_temp, Address(rsi_array, elem_offset));
1177 __ movptr(Address(rax_argslot, slot_offset), rbx_temp);
1178 elem_offset += type2aelembytes(elem_type);
1179 slot_offset += Interpreter::stackElementSize;
1180 }
1181 }
1182
1183 // Arguments are spread. Move to next method handle.
1184 UNPUSH_RSI_RDI;
1185 __ load_heap_oop(rcx_recv, rcx_mh_vmtarget);
1186 __ jump_to_method_handle_entry(rcx_recv, rdx_temp);
1187
1188 __ bind(bad_array_klass);
1189 UNPUSH_RSI_RDI;
1190 __ pushptr(Address(rdx_array_klass, java_mirror_offset)); // required type
1191 __ pushptr(vmarg); // bad array
1192 __ push((int)Bytecodes::_aaload); // who is complaining?
1193 __ jump(ExternalAddress(from_interpreted_entry(_raise_exception)));
1194
1195 __ bind(bad_array_length);
1196 UNPUSH_RSI_RDI;
1197 __ push(rcx_recv); // AMH requiring a certain length
1198 __ pushptr(vmarg); // bad array
1199 __ push((int)Bytecodes::_arraylength); // who is complaining?
1200 __ jump(ExternalAddress(from_interpreted_entry(_raise_exception)));
1201
1202 #undef UNPUSH_RSI_RDI
1203 }
1204 break;
1205
1206 case _adapter_flyby:
1207 case _adapter_ricochet:
1208 __ unimplemented(entry_name(ek)); // %%% FIXME: NYI
1209 break;
1210
1211 default: ShouldNotReachHere();
1212 }
1213 __ hlt();
1214
1215 address me_cookie = MethodHandleEntry::start_compiled_entry(_masm, interp_entry);
1216 __ unimplemented(entry_name(ek)); // %%% FIXME: NYI
1217
1218 init_entry(ek, MethodHandleEntry::finish_compiled_entry(_masm, me_cookie));
1219 }