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 __ load_heap_oop(rdx_temp, Address(rax_mtype, __ delayed_value(java_dyn_MethodType::form_offset_in_bytes, rdi_temp)));
129 Register rdx_vmslots = rdx_temp;
130 __ movl(rdx_vmslots, Address(rdx_temp, __ delayed_value(java_dyn_MethodTypeForm::vmslots_offset_in_bytes, rdi_temp)));
131 __ movptr(rcx_recv, __ argument_address(rdx_vmslots));
132
133 trace_method_handle(_masm, "invokeExact");
134
135 __ check_method_handle_type(rax_mtype, rcx_recv, rdi_temp, wrong_method_type);
136 __ jump_to_method_handle_entry(rcx_recv, rdi_temp);
137
138 // for invokeGeneric (only), apply argument and result conversions on the fly
139 __ bind(invoke_generic_slow_path);
140 #ifdef ASSERT
141 { Label L;
142 __ cmpb(Address(rbx_method, methodOopDesc::intrinsic_id_offset_in_bytes()), (int) vmIntrinsics::_invokeGeneric);
143 __ jcc(Assembler::equal, L);
144 __ stop("bad methodOop::intrinsic_id");
145 __ bind(L);
146 }
147 #endif //ASSERT
148 Register rbx_temp = rbx_method; // don't need it now
149
150 // make room on the stack for another pointer:
151 Register rcx_argslot = rcx_recv;
152 __ lea(rcx_argslot, __ argument_address(rdx_vmslots, 1));
153 insert_arg_slots(_masm, 2 * stack_move_unit(), _INSERT_REF_MASK,
154 rcx_argslot, rbx_temp, rdx_temp);
155
156 // load up an adapter from the calling type (Java weaves this)
157 __ load_heap_oop(rdx_temp, Address(rax_mtype, __ delayed_value(java_dyn_MethodType::form_offset_in_bytes, rdi_temp)));
158 Register rdx_adapter = rdx_temp;
159 // __ load_heap_oop(rdx_adapter, Address(rdx_temp, java_dyn_MethodTypeForm::genericInvoker_offset_in_bytes()));
160 // deal with old JDK versions:
161 __ lea(rdi_temp, Address(rdx_temp, __ delayed_value(java_dyn_MethodTypeForm::genericInvoker_offset_in_bytes, rdi_temp)));
162 __ cmpptr(rdi_temp, rdx_temp);
163 Label sorry_no_invoke_generic;
164 __ jcc(Assembler::below, sorry_no_invoke_generic);
165
166 __ load_heap_oop(rdx_adapter, Address(rdi_temp, 0));
167 __ testptr(rdx_adapter, rdx_adapter);
168 __ jcc(Assembler::zero, sorry_no_invoke_generic);
169 __ movptr(Address(rcx_argslot, 1 * Interpreter::stackElementSize), rdx_adapter);
170 // As a trusted first argument, pass the type being called, so the adapter knows
171 // the actual types of the arguments and return values.
172 // (Generic invokers are shared among form-families of method-type.)
173 __ movptr(Address(rcx_argslot, 0 * Interpreter::stackElementSize), rax_mtype);
174 // FIXME: assert that rdx_adapter is of the right method-type.
175 __ mov(rcx, rdx_adapter);
176 trace_method_handle(_masm, "invokeGeneric");
177 __ jump_to_method_handle_entry(rcx, rdi_temp);
178
179 __ bind(sorry_no_invoke_generic); // no invokeGeneric implementation available!
180 __ movptr(rcx_recv, Address(rcx_argslot, -1 * Interpreter::stackElementSize)); // recover original MH
181 __ push(rax_mtype); // required mtype
182 __ push(rcx_recv); // bad mh (1st stacked argument)
183 __ jump(ExternalAddress(Interpreter::throw_WrongMethodType_entry()));
184
185 return entry_point;
186 }
187
188 // Helper to insert argument slots into the stack.
189 // arg_slots must be a multiple of stack_move_unit() and <= 0
190 void MethodHandles::insert_arg_slots(MacroAssembler* _masm,
191 RegisterOrConstant arg_slots,
192 int arg_mask,
193 Register rax_argslot,
194 Register rbx_temp, Register rdx_temp, Register temp3_reg) {
195 assert(temp3_reg == noreg, "temp3 not required");
196 assert_different_registers(rax_argslot, rbx_temp, rdx_temp,
197 (!arg_slots.is_register() ? rsp : arg_slots.as_register()));
198
199 #ifdef ASSERT
200 verify_argslot(_masm, rax_argslot, "insertion point must fall within current frame");
201 if (arg_slots.is_register()) {
202 Label L_ok, L_bad;
203 __ cmpptr(arg_slots.as_register(), (int32_t) NULL_WORD);
204 __ jccb(Assembler::greater, L_bad);
205 __ testl(arg_slots.as_register(), -stack_move_unit() - 1);
206 __ jccb(Assembler::zero, L_ok);
207 __ bind(L_bad);
208 __ stop("assert arg_slots <= 0 and clear low bits");
209 __ bind(L_ok);
210 } else {
211 assert(arg_slots.as_constant() <= 0, "");
212 assert(arg_slots.as_constant() % -stack_move_unit() == 0, "");
213 }
214 #endif //ASSERT
215
216 #ifdef _LP64
217 if (arg_slots.is_register()) {
218 // clean high bits of stack motion register (was loaded as an int)
219 __ movslq(arg_slots.as_register(), arg_slots.as_register());
220 }
221 #endif
222
223 // Make space on the stack for the inserted argument(s).
224 // Then pull down everything shallower than rax_argslot.
225 // The stacked return address gets pulled down with everything else.
226 // That is, copy [rsp, argslot) downward by -size words. In pseudo-code:
227 // rsp -= size;
228 // for (rdx = rsp + size; rdx < argslot; rdx++)
229 // rdx[-size] = rdx[0]
230 // argslot -= size;
231 BLOCK_COMMENT("insert_arg_slots {");
232 __ mov(rdx_temp, rsp); // source pointer for copy
233 __ lea(rsp, Address(rsp, arg_slots, Address::times_ptr));
234 {
235 Label loop;
236 __ BIND(loop);
237 // pull one word down each time through the loop
238 __ movptr(rbx_temp, Address(rdx_temp, 0));
239 __ movptr(Address(rdx_temp, arg_slots, Address::times_ptr), rbx_temp);
240 __ addptr(rdx_temp, wordSize);
241 __ cmpptr(rdx_temp, rax_argslot);
242 __ jccb(Assembler::less, loop);
243 }
244
245 // Now move the argslot down, to point to the opened-up space.
246 __ lea(rax_argslot, Address(rax_argslot, arg_slots, Address::times_ptr));
247 BLOCK_COMMENT("} insert_arg_slots");
248 }
249
250 // Helper to remove argument slots from the stack.
251 // arg_slots must be a multiple of stack_move_unit() and >= 0
252 void MethodHandles::remove_arg_slots(MacroAssembler* _masm,
253 RegisterOrConstant arg_slots,
254 Register rax_argslot,
255 Register rbx_temp, Register rdx_temp, Register temp3_reg) {
256 assert(temp3_reg == noreg, "temp3 not required");
257 assert_different_registers(rax_argslot, rbx_temp, rdx_temp,
258 (!arg_slots.is_register() ? rsp : arg_slots.as_register()));
259
260 #ifdef ASSERT
261 // Verify that [argslot..argslot+size) lies within (rsp, rbp).
262 __ lea(rbx_temp, Address(rax_argslot, arg_slots, Address::times_ptr));
263 verify_argslot(_masm, rbx_temp, "deleted argument(s) must fall within current frame");
264 if (arg_slots.is_register()) {
265 Label L_ok, L_bad;
266 __ cmpptr(arg_slots.as_register(), (int32_t) NULL_WORD);
267 __ jccb(Assembler::less, L_bad);
268 __ testl(arg_slots.as_register(), -stack_move_unit() - 1);
269 __ jccb(Assembler::zero, L_ok);
270 __ bind(L_bad);
271 __ stop("assert arg_slots >= 0 and clear low bits");
272 __ bind(L_ok);
273 } else {
274 assert(arg_slots.as_constant() >= 0, "");
275 assert(arg_slots.as_constant() % -stack_move_unit() == 0, "");
276 }
277 #endif //ASSERT
278
279 #ifdef _LP64
280 if (false) { // not needed, since register is positive
281 // clean high bits of stack motion register (was loaded as an int)
282 if (arg_slots.is_register())
283 __ movslq(arg_slots.as_register(), arg_slots.as_register());
284 }
285 #endif
286
287 BLOCK_COMMENT("remove_arg_slots {");
288 // Pull up everything shallower than rax_argslot.
289 // Then remove the excess space on the stack.
290 // The stacked return address gets pulled up with everything else.
291 // That is, copy [rsp, argslot) upward by size words. In pseudo-code:
292 // for (rdx = argslot-1; rdx >= rsp; --rdx)
293 // rdx[size] = rdx[0]
294 // argslot += size;
295 // rsp += size;
296 __ lea(rdx_temp, Address(rax_argslot, -wordSize)); // source pointer for copy
297 {
298 Label loop;
299 __ BIND(loop);
300 // pull one word up each time through the loop
301 __ movptr(rbx_temp, Address(rdx_temp, 0));
302 __ movptr(Address(rdx_temp, arg_slots, Address::times_ptr), rbx_temp);
303 __ addptr(rdx_temp, -wordSize);
304 __ cmpptr(rdx_temp, rsp);
305 __ jccb(Assembler::greaterEqual, loop);
306 }
307
308 // Now move the argslot up, to point to the just-copied block.
309 __ lea(rsp, Address(rsp, arg_slots, Address::times_ptr));
310 // And adjust the argslot address to point at the deletion point.
311 __ lea(rax_argslot, Address(rax_argslot, arg_slots, Address::times_ptr));
312 BLOCK_COMMENT("} remove_arg_slots");
313 }
314
315 #ifndef PRODUCT
316 extern "C" void print_method_handle(oop mh);
317 void trace_method_handle_stub(const char* adaptername,
318 oop mh,
319 intptr_t* saved_regs,
320 intptr_t* entry_sp,
321 intptr_t* saved_sp,
322 intptr_t* saved_bp) {
323 // called as a leaf from native code: do not block the JVM!
324 intptr_t* last_sp = (intptr_t*) saved_bp[frame::interpreter_frame_last_sp_offset];
325 intptr_t* base_sp = (intptr_t*) saved_bp[frame::interpreter_frame_monitor_block_top_offset];
326 printf("MH %s mh="INTPTR_FORMAT" sp=("INTPTR_FORMAT"+"INTX_FORMAT") stack_size="INTX_FORMAT" bp="INTPTR_FORMAT"\n",
327 adaptername, (intptr_t)mh, (intptr_t)entry_sp, (intptr_t)(saved_sp - entry_sp), (intptr_t)(base_sp - last_sp), (intptr_t)saved_bp);
328 if (last_sp != saved_sp && last_sp != NULL)
329 printf("*** last_sp="INTPTR_FORMAT"\n", (intptr_t)last_sp);
330 if (Verbose) {
331 printf(" reg dump: ");
332 int saved_regs_count = (entry_sp-1) - saved_regs;
333 // 32 bit: rdi rsi rbp rsp; rbx rdx rcx (*) rax
334 int i;
335 for (i = 0; i <= saved_regs_count; i++) {
336 if (i > 0 && i % 4 == 0 && i != saved_regs_count)
337 printf("\n + dump: ");
338 printf(" %d: "INTPTR_FORMAT, i, saved_regs[i]);
339 }
340 printf("\n");
341 int stack_dump_count = 16;
342 if (stack_dump_count < (int)(saved_bp + 2 - saved_sp))
343 stack_dump_count = (int)(saved_bp + 2 - saved_sp);
344 if (stack_dump_count > 64) stack_dump_count = 48;
345 for (i = 0; i < stack_dump_count; i += 4) {
346 printf(" dump at SP[%d] "INTPTR_FORMAT": "INTPTR_FORMAT" "INTPTR_FORMAT" "INTPTR_FORMAT" "INTPTR_FORMAT"\n",
347 i, (intptr_t) &entry_sp[i+0], entry_sp[i+0], entry_sp[i+1], entry_sp[i+2], entry_sp[i+3]);
348 }
349 print_method_handle(mh);
350 }
351 }
352 void MethodHandles::trace_method_handle(MacroAssembler* _masm, const char* adaptername) {
353 if (!TraceMethodHandles) return;
354 BLOCK_COMMENT("trace_method_handle {");
355 __ push(rax);
356 __ lea(rax, Address(rsp, wordSize*6)); // entry_sp
357 __ pusha();
358 // arguments:
359 __ push(rbp); // interpreter frame pointer
360 __ push(rsi); // saved_sp
361 __ push(rax); // entry_sp
362 __ push(rcx); // mh
363 __ push(rcx);
364 __ movptr(Address(rsp, 0), (intptr_t) adaptername);
365 __ call_VM_leaf(CAST_FROM_FN_PTR(address, trace_method_handle_stub), 5);
366 __ popa();
367 __ pop(rax);
368 BLOCK_COMMENT("} trace_method_handle");
369 }
370 #endif //PRODUCT
371
372 // which conversion op types are implemented here?
373 int MethodHandles::adapter_conversion_ops_supported_mask() {
374 return ((1<<sun_dyn_AdapterMethodHandle::OP_RETYPE_ONLY)
375 |(1<<sun_dyn_AdapterMethodHandle::OP_RETYPE_RAW)
376 |(1<<sun_dyn_AdapterMethodHandle::OP_CHECK_CAST)
377 |(1<<sun_dyn_AdapterMethodHandle::OP_PRIM_TO_PRIM)
378 |(1<<sun_dyn_AdapterMethodHandle::OP_REF_TO_PRIM)
379 |(1<<sun_dyn_AdapterMethodHandle::OP_SWAP_ARGS)
380 |(1<<sun_dyn_AdapterMethodHandle::OP_ROT_ARGS)
381 |(1<<sun_dyn_AdapterMethodHandle::OP_DUP_ARGS)
382 |(1<<sun_dyn_AdapterMethodHandle::OP_DROP_ARGS)
383 //|(1<<sun_dyn_AdapterMethodHandle::OP_SPREAD_ARGS) //BUG!
384 );
385 // FIXME: MethodHandlesTest gets a crash if we enable OP_SPREAD_ARGS.
386 }
387
388 //------------------------------------------------------------------------------
389 // MethodHandles::generate_method_handle_stub
390 //
391 // Generate an "entry" field for a method handle.
392 // This determines how the method handle will respond to calls.
393 void MethodHandles::generate_method_handle_stub(MacroAssembler* _masm, MethodHandles::EntryKind ek, TRAPS) {
394 // Here is the register state during an interpreted call,
395 // as set up by generate_method_handle_interpreter_entry():
396 // - rbx: garbage temp (was MethodHandle.invoke methodOop, unused)
397 // - rcx: receiver method handle
398 // - rax: method handle type (only used by the check_mtype entry point)
399 // - rsi/r13: sender SP (must preserve; see prepare_to_jump_from_interpreted)
400 // - rdx: garbage temp, can blow away
401
402 const Register rcx_recv = rcx;
403 const Register rax_argslot = rax;
404 const Register rbx_temp = rbx;
405 const Register rdx_temp = rdx;
406
407 // This guy is set up by prepare_to_jump_from_interpreted (from interpreted calls)
408 // and gen_c2i_adapter (from compiled calls):
409 const Register saved_last_sp = LP64_ONLY(r13) NOT_LP64(rsi);
410
411 // Argument registers for _raise_exception.
412 // 32-bit: Pass first two oop/int args in registers ECX and EDX.
413 const Register rarg0_code = LP64_ONLY(j_rarg0) NOT_LP64(rcx);
414 const Register rarg1_actual = LP64_ONLY(j_rarg1) NOT_LP64(rdx);
415 const Register rarg2_required = LP64_ONLY(j_rarg2) NOT_LP64(rdi);
416 assert_different_registers(rarg0_code, rarg1_actual, rarg2_required, saved_last_sp);
417
418 guarantee(java_dyn_MethodHandle::vmentry_offset_in_bytes() != 0, "must have offsets");
419
420 // some handy addresses
421 Address rbx_method_fie( rbx, methodOopDesc::from_interpreted_offset() );
422
423 Address rcx_mh_vmtarget( rcx_recv, java_dyn_MethodHandle::vmtarget_offset_in_bytes() );
424 Address rcx_dmh_vmindex( rcx_recv, sun_dyn_DirectMethodHandle::vmindex_offset_in_bytes() );
425
426 Address rcx_bmh_vmargslot( rcx_recv, sun_dyn_BoundMethodHandle::vmargslot_offset_in_bytes() );
427 Address rcx_bmh_argument( rcx_recv, sun_dyn_BoundMethodHandle::argument_offset_in_bytes() );
428
429 Address rcx_amh_vmargslot( rcx_recv, sun_dyn_AdapterMethodHandle::vmargslot_offset_in_bytes() );
430 Address rcx_amh_argument( rcx_recv, sun_dyn_AdapterMethodHandle::argument_offset_in_bytes() );
431 Address rcx_amh_conversion( rcx_recv, sun_dyn_AdapterMethodHandle::conversion_offset_in_bytes() );
432 Address vmarg; // __ argument_address(vmargslot)
433
434 const int java_mirror_offset = klassOopDesc::klass_part_offset_in_bytes() + Klass::java_mirror_offset_in_bytes();
435
436 if (have_entry(ek)) {
437 __ nop(); // empty stubs make SG sick
438 return;
439 }
440
441 address interp_entry = __ pc();
442
443 trace_method_handle(_masm, entry_name(ek));
444
445 BLOCK_COMMENT(entry_name(ek));
446
447 switch ((int) ek) {
448 case _raise_exception:
449 {
450 // Not a real MH entry, but rather shared code for raising an
451 // exception. Since we use a C2I adapter to set up the
452 // interpreter state, arguments are expected in compiler
453 // argument registers.
454 methodHandle mh(raise_exception_method());
455 address c2i_entry = methodOopDesc::make_adapters(mh, CHECK);
456
457 const Register rdi_pc = rax;
458 __ pop(rdi_pc); // caller PC
459 __ mov(rsp, saved_last_sp); // cut the stack back to where the caller started
460
461 Register rbx_method = rbx_temp;
462 Label L_no_method;
463 // FIXME: fill in _raise_exception_method with a suitable sun.dyn method
464 __ movptr(rbx_method, ExternalAddress((address) &_raise_exception_method));
465 __ testptr(rbx_method, rbx_method);
466 __ jccb(Assembler::zero, L_no_method);
467
468 const int jobject_oop_offset = 0;
469 __ movptr(rbx_method, Address(rbx_method, jobject_oop_offset)); // dereference the jobject
470 __ testptr(rbx_method, rbx_method);
471 __ jccb(Assembler::zero, L_no_method);
472 __ verify_oop(rbx_method);
473
474 // 32-bit: push remaining arguments as if coming from the compiler.
475 NOT_LP64(__ push(rarg2_required));
476
477 __ push(rdi_pc); // restore caller PC
478 __ jump(ExternalAddress(c2i_entry)); // do C2I transition
479
480 // If we get here, the Java runtime did not do its job of creating the exception.
481 // Do something that is at least causes a valid throw from the interpreter.
482 __ bind(L_no_method);
483 __ push(rarg2_required);
484 __ push(rarg1_actual);
485 __ jump(ExternalAddress(Interpreter::throw_WrongMethodType_entry()));
486 }
487 break;
488
489 case _invokestatic_mh:
490 case _invokespecial_mh:
491 {
492 Register rbx_method = rbx_temp;
493 __ load_heap_oop(rbx_method, rcx_mh_vmtarget); // target is a methodOop
494 __ verify_oop(rbx_method);
495 // same as TemplateTable::invokestatic or invokespecial,
496 // minus the CP setup and profiling:
497 if (ek == _invokespecial_mh) {
498 // Must load & check the first argument before entering the target method.
499 __ load_method_handle_vmslots(rax_argslot, rcx_recv, rdx_temp);
500 __ movptr(rcx_recv, __ argument_address(rax_argslot, -1));
501 __ null_check(rcx_recv);
502 __ verify_oop(rcx_recv);
503 }
504 __ jmp(rbx_method_fie);
505 }
506 break;
507
508 case _invokevirtual_mh:
509 {
510 // same as TemplateTable::invokevirtual,
511 // minus the CP setup and profiling:
512
513 // pick out the vtable index and receiver offset from the MH,
514 // and then we can discard it:
515 __ load_method_handle_vmslots(rax_argslot, rcx_recv, rdx_temp);
516 Register rbx_index = rbx_temp;
517 __ movl(rbx_index, rcx_dmh_vmindex);
518 // Note: The verifier allows us to ignore rcx_mh_vmtarget.
519 __ movptr(rcx_recv, __ argument_address(rax_argslot, -1));
520 __ null_check(rcx_recv, oopDesc::klass_offset_in_bytes());
521
522 // get receiver klass
523 Register rax_klass = rax_argslot;
524 __ load_klass(rax_klass, rcx_recv);
525 __ verify_oop(rax_klass);
526
527 // get target methodOop & entry point
528 const int base = instanceKlass::vtable_start_offset() * wordSize;
529 assert(vtableEntry::size() * wordSize == wordSize, "adjust the scaling in the code below");
530 Address vtable_entry_addr(rax_klass,
531 rbx_index, Address::times_ptr,
532 base + vtableEntry::method_offset_in_bytes());
533 Register rbx_method = rbx_temp;
534 __ movptr(rbx_method, vtable_entry_addr);
535
536 __ verify_oop(rbx_method);
537 __ jmp(rbx_method_fie);
538 }
539 break;
540
541 case _invokeinterface_mh:
542 {
543 // same as TemplateTable::invokeinterface,
544 // minus the CP setup and profiling:
545
546 // pick out the interface and itable index from the MH.
547 __ load_method_handle_vmslots(rax_argslot, rcx_recv, rdx_temp);
548 Register rdx_intf = rdx_temp;
549 Register rbx_index = rbx_temp;
550 __ load_heap_oop(rdx_intf, rcx_mh_vmtarget);
551 __ movl(rbx_index, rcx_dmh_vmindex);
552 __ movptr(rcx_recv, __ argument_address(rax_argslot, -1));
553 __ null_check(rcx_recv, oopDesc::klass_offset_in_bytes());
554
555 // get receiver klass
556 Register rax_klass = rax_argslot;
557 __ load_klass(rax_klass, rcx_recv);
558 __ verify_oop(rax_klass);
559
560 Register rdi_temp = rdi;
561 Register rbx_method = rbx_index;
562
563 // get interface klass
564 Label no_such_interface;
565 __ verify_oop(rdx_intf);
566 __ lookup_interface_method(rax_klass, rdx_intf,
567 // note: next two args must be the same:
568 rbx_index, rbx_method,
569 rdi_temp,
570 no_such_interface);
571
572 __ verify_oop(rbx_method);
573 __ jmp(rbx_method_fie);
574 __ hlt();
575
576 __ bind(no_such_interface);
577 // Throw an exception.
578 // For historical reasons, it will be IncompatibleClassChangeError.
579 __ mov(rbx_temp, rcx_recv); // rarg2_required might be RCX
580 assert_different_registers(rarg2_required, rbx_temp);
581 __ movptr(rarg2_required, Address(rdx_intf, java_mirror_offset)); // required interface
582 __ mov( rarg1_actual, rbx_temp); // bad receiver
583 __ movl( rarg0_code, (int) Bytecodes::_invokeinterface); // who is complaining?
584 __ jump(ExternalAddress(from_interpreted_entry(_raise_exception)));
585 }
586 break;
587
588 case _bound_ref_mh:
589 case _bound_int_mh:
590 case _bound_long_mh:
591 case _bound_ref_direct_mh:
592 case _bound_int_direct_mh:
593 case _bound_long_direct_mh:
594 {
595 bool direct_to_method = (ek >= _bound_ref_direct_mh);
596 BasicType arg_type = T_ILLEGAL;
597 int arg_mask = _INSERT_NO_MASK;
598 int arg_slots = -1;
599 get_ek_bound_mh_info(ek, arg_type, arg_mask, arg_slots);
600
601 // make room for the new argument:
602 __ movl(rax_argslot, rcx_bmh_vmargslot);
603 __ lea(rax_argslot, __ argument_address(rax_argslot));
604 insert_arg_slots(_masm, arg_slots * stack_move_unit(), arg_mask,
605 rax_argslot, rbx_temp, rdx_temp);
606
607 // store bound argument into the new stack slot:
608 __ load_heap_oop(rbx_temp, rcx_bmh_argument);
609 Address prim_value_addr(rbx_temp, java_lang_boxing_object::value_offset_in_bytes(arg_type));
610 if (arg_type == T_OBJECT) {
611 __ movptr(Address(rax_argslot, 0), rbx_temp);
612 } else {
613 __ load_sized_value(rdx_temp, prim_value_addr,
614 type2aelembytes(arg_type), is_signed_subword_type(arg_type));
615 __ movptr(Address(rax_argslot, 0), rdx_temp);
616 #ifndef _LP64
617 if (arg_slots == 2) {
618 __ movl(rdx_temp, prim_value_addr.plus_disp(wordSize));
619 __ movl(Address(rax_argslot, Interpreter::stackElementSize), rdx_temp);
620 }
621 #endif //_LP64
622 }
623
624 if (direct_to_method) {
625 Register rbx_method = rbx_temp;
626 __ load_heap_oop(rbx_method, rcx_mh_vmtarget);
627 __ verify_oop(rbx_method);
628 __ jmp(rbx_method_fie);
629 } else {
630 __ load_heap_oop(rcx_recv, rcx_mh_vmtarget);
631 __ verify_oop(rcx_recv);
632 __ jump_to_method_handle_entry(rcx_recv, rdx_temp);
633 }
634 }
635 break;
636
637 case _adapter_retype_only:
638 case _adapter_retype_raw:
639 // immediately jump to the next MH layer:
640 __ load_heap_oop(rcx_recv, rcx_mh_vmtarget);
641 __ verify_oop(rcx_recv);
642 __ jump_to_method_handle_entry(rcx_recv, rdx_temp);
643 // This is OK when all parameter types widen.
644 // It is also OK when a return type narrows.
645 break;
646
647 case _adapter_check_cast:
648 {
649 // temps:
650 Register rbx_klass = rbx_temp; // interesting AMH data
651
652 // check a reference argument before jumping to the next layer of MH:
653 __ movl(rax_argslot, rcx_amh_vmargslot);
654 vmarg = __ argument_address(rax_argslot);
655
656 // What class are we casting to?
657 __ load_heap_oop(rbx_klass, rcx_amh_argument); // this is a Class object!
658 __ load_heap_oop(rbx_klass, Address(rbx_klass, java_lang_Class::klass_offset_in_bytes()));
659
660 Label done;
661 __ movptr(rdx_temp, vmarg);
662 __ testptr(rdx_temp, rdx_temp);
663 __ jcc(Assembler::zero, done); // no cast if null
664 __ load_klass(rdx_temp, rdx_temp);
665
666 // live at this point:
667 // - rbx_klass: klass required by the target method
668 // - rdx_temp: argument klass to test
669 // - rcx_recv: adapter method handle
670 __ check_klass_subtype(rdx_temp, rbx_klass, rax_argslot, done);
671
672 // If we get here, the type check failed!
673 // Call the wrong_method_type stub, passing the failing argument type in rax.
674 Register rax_mtype = rax_argslot;
675 __ movl(rax_argslot, rcx_amh_vmargslot); // reload argslot field
676 __ movptr(rdx_temp, vmarg);
677
678 assert_different_registers(rarg2_required, rdx_temp);
679 __ load_heap_oop(rarg2_required, rcx_amh_argument); // required class
680 __ mov( rarg1_actual, rdx_temp); // bad object
681 __ movl( rarg0_code, (int) Bytecodes::_checkcast); // who is complaining?
682 __ jump(ExternalAddress(from_interpreted_entry(_raise_exception)));
683
684 __ bind(done);
685 // get the new MH:
686 __ load_heap_oop(rcx_recv, rcx_mh_vmtarget);
687 __ jump_to_method_handle_entry(rcx_recv, rdx_temp);
688 }
689 break;
690
691 case _adapter_prim_to_prim:
692 case _adapter_ref_to_prim:
693 // handled completely by optimized cases
694 __ stop("init_AdapterMethodHandle should not issue this");
695 break;
696
697 case _adapter_opt_i2i: // optimized subcase of adapt_prim_to_prim
698 //case _adapter_opt_f2i: // optimized subcase of adapt_prim_to_prim
699 case _adapter_opt_l2i: // optimized subcase of adapt_prim_to_prim
700 case _adapter_opt_unboxi: // optimized subcase of adapt_ref_to_prim
701 {
702 // perform an in-place conversion to int or an int subword
703 __ movl(rax_argslot, rcx_amh_vmargslot);
704 vmarg = __ argument_address(rax_argslot);
705
706 switch (ek) {
707 case _adapter_opt_i2i:
708 __ movl(rdx_temp, vmarg);
709 break;
710 case _adapter_opt_l2i:
711 {
712 // just delete the extra slot; on a little-endian machine we keep the first
713 __ lea(rax_argslot, __ argument_address(rax_argslot, 1));
714 remove_arg_slots(_masm, -stack_move_unit(),
715 rax_argslot, rbx_temp, rdx_temp);
716 vmarg = Address(rax_argslot, -Interpreter::stackElementSize);
717 __ movl(rdx_temp, vmarg);
718 }
719 break;
720 case _adapter_opt_unboxi:
721 {
722 // Load the value up from the heap.
723 __ movptr(rdx_temp, vmarg);
724 int value_offset = java_lang_boxing_object::value_offset_in_bytes(T_INT);
725 #ifdef ASSERT
726 for (int bt = T_BOOLEAN; bt < T_INT; bt++) {
727 if (is_subword_type(BasicType(bt)))
728 assert(value_offset == java_lang_boxing_object::value_offset_in_bytes(BasicType(bt)), "");
729 }
730 #endif
731 __ null_check(rdx_temp, value_offset);
732 __ movl(rdx_temp, Address(rdx_temp, value_offset));
733 // We load this as a word. Because we are little-endian,
734 // the low bits will be correct, but the high bits may need cleaning.
735 // The vminfo will guide us to clean those bits.
736 }
737 break;
738 default:
739 ShouldNotReachHere();
740 }
741
742 // Do the requested conversion and store the value.
743 Register rbx_vminfo = rbx_temp;
744 __ movl(rbx_vminfo, rcx_amh_conversion);
745 assert(CONV_VMINFO_SHIFT == 0, "preshifted");
746
747 // get the new MH:
748 __ load_heap_oop(rcx_recv, rcx_mh_vmtarget);
749 // (now we are done with the old MH)
750
751 // original 32-bit vmdata word must be of this form:
752 // | MBZ:6 | signBitCount:8 | srcDstTypes:8 | conversionOp:8 |
753 __ xchgptr(rcx, rbx_vminfo); // free rcx for shifts
754 __ shll(rdx_temp /*, rcx*/);
755 Label zero_extend, done;
756 __ testl(rcx, CONV_VMINFO_SIGN_FLAG);
757 __ jccb(Assembler::zero, zero_extend);
758
759 // this path is taken for int->byte, int->short
760 __ sarl(rdx_temp /*, rcx*/);
761 __ jmpb(done);
762
763 __ bind(zero_extend);
764 // this is taken for int->char
765 __ shrl(rdx_temp /*, rcx*/);
766
767 __ bind(done);
768 __ movl(vmarg, rdx_temp); // Store the value.
769 __ xchgptr(rcx, rbx_vminfo); // restore rcx_recv
770
771 __ jump_to_method_handle_entry(rcx_recv, rdx_temp);
772 }
773 break;
774
775 case _adapter_opt_i2l: // optimized subcase of adapt_prim_to_prim
776 case _adapter_opt_unboxl: // optimized subcase of adapt_ref_to_prim
777 {
778 // perform an in-place int-to-long or ref-to-long conversion
779 __ movl(rax_argslot, rcx_amh_vmargslot);
780
781 // on a little-endian machine we keep the first slot and add another after
782 __ lea(rax_argslot, __ argument_address(rax_argslot, 1));
783 insert_arg_slots(_masm, stack_move_unit(), _INSERT_INT_MASK,
784 rax_argslot, rbx_temp, rdx_temp);
785 Address vmarg1(rax_argslot, -Interpreter::stackElementSize);
786 Address vmarg2 = vmarg1.plus_disp(Interpreter::stackElementSize);
787
788 switch (ek) {
789 case _adapter_opt_i2l:
790 {
791 #ifdef _LP64
792 __ movslq(rdx_temp, vmarg1); // Load sign-extended
793 __ movq(vmarg1, rdx_temp); // Store into first slot
794 #else
795 __ movl(rdx_temp, vmarg1);
796 __ sarl(rdx_temp, BitsPerInt - 1); // __ extend_sign()
797 __ movl(vmarg2, rdx_temp); // store second word
798 #endif
799 }
800 break;
801 case _adapter_opt_unboxl:
802 {
803 // Load the value up from the heap.
804 __ movptr(rdx_temp, vmarg1);
805 int value_offset = java_lang_boxing_object::value_offset_in_bytes(T_LONG);
806 assert(value_offset == java_lang_boxing_object::value_offset_in_bytes(T_DOUBLE), "");
807 __ null_check(rdx_temp, value_offset);
808 #ifdef _LP64
809 __ movq(rbx_temp, Address(rdx_temp, value_offset));
810 __ movq(vmarg1, rbx_temp);
811 #else
812 __ movl(rbx_temp, Address(rdx_temp, value_offset + 0*BytesPerInt));
813 __ movl(rdx_temp, Address(rdx_temp, value_offset + 1*BytesPerInt));
814 __ movl(vmarg1, rbx_temp);
815 __ movl(vmarg2, rdx_temp);
816 #endif
817 }
818 break;
819 default:
820 ShouldNotReachHere();
821 }
822
823 __ load_heap_oop(rcx_recv, rcx_mh_vmtarget);
824 __ jump_to_method_handle_entry(rcx_recv, rdx_temp);
825 }
826 break;
827
828 case _adapter_opt_f2d: // optimized subcase of adapt_prim_to_prim
829 case _adapter_opt_d2f: // optimized subcase of adapt_prim_to_prim
830 {
831 // perform an in-place floating primitive conversion
832 __ movl(rax_argslot, rcx_amh_vmargslot);
833 __ lea(rax_argslot, __ argument_address(rax_argslot, 1));
834 if (ek == _adapter_opt_f2d) {
835 insert_arg_slots(_masm, stack_move_unit(), _INSERT_INT_MASK,
836 rax_argslot, rbx_temp, rdx_temp);
837 }
838 Address vmarg(rax_argslot, -Interpreter::stackElementSize);
839
840 #ifdef _LP64
841 if (ek == _adapter_opt_f2d) {
842 __ movflt(xmm0, vmarg);
843 __ cvtss2sd(xmm0, xmm0);
844 __ movdbl(vmarg, xmm0);
845 } else {
846 __ movdbl(xmm0, vmarg);
847 __ cvtsd2ss(xmm0, xmm0);
848 __ movflt(vmarg, xmm0);
849 }
850 #else //_LP64
851 if (ek == _adapter_opt_f2d) {
852 __ fld_s(vmarg); // load float to ST0
853 __ fstp_s(vmarg); // store single
854 } else {
855 __ fld_d(vmarg); // load double to ST0
856 __ fstp_s(vmarg); // store single
857 }
858 #endif //_LP64
859
860 if (ek == _adapter_opt_d2f) {
861 remove_arg_slots(_masm, -stack_move_unit(),
862 rax_argslot, rbx_temp, rdx_temp);
863 }
864
865 __ load_heap_oop(rcx_recv, rcx_mh_vmtarget);
866 __ jump_to_method_handle_entry(rcx_recv, rdx_temp);
867 }
868 break;
869
870 case _adapter_prim_to_ref:
871 __ unimplemented(entry_name(ek)); // %%% FIXME: NYI
872 break;
873
874 case _adapter_swap_args:
875 case _adapter_rot_args:
876 // handled completely by optimized cases
877 __ stop("init_AdapterMethodHandle should not issue this");
878 break;
879
880 case _adapter_opt_swap_1:
881 case _adapter_opt_swap_2:
882 case _adapter_opt_rot_1_up:
883 case _adapter_opt_rot_1_down:
884 case _adapter_opt_rot_2_up:
885 case _adapter_opt_rot_2_down:
886 {
887 int swap_bytes = 0, rotate = 0;
888 get_ek_adapter_opt_swap_rot_info(ek, swap_bytes, rotate);
889
890 // 'argslot' is the position of the first argument to swap
891 __ movl(rax_argslot, rcx_amh_vmargslot);
892 __ lea(rax_argslot, __ argument_address(rax_argslot));
893
894 // 'vminfo' is the second
895 Register rbx_destslot = rbx_temp;
896 __ movl(rbx_destslot, rcx_amh_conversion);
897 assert(CONV_VMINFO_SHIFT == 0, "preshifted");
898 __ andl(rbx_destslot, CONV_VMINFO_MASK);
899 __ lea(rbx_destslot, __ argument_address(rbx_destslot));
900 DEBUG_ONLY(verify_argslot(_masm, rbx_destslot, "swap point must fall within current frame"));
901
902 if (!rotate) {
903 for (int i = 0; i < swap_bytes; i += wordSize) {
904 __ movptr(rdx_temp, Address(rax_argslot , i));
905 __ push(rdx_temp);
906 __ movptr(rdx_temp, Address(rbx_destslot, i));
907 __ movptr(Address(rax_argslot, i), rdx_temp);
908 __ pop(rdx_temp);
909 __ movptr(Address(rbx_destslot, i), rdx_temp);
910 }
911 } else {
912 // push the first chunk, which is going to get overwritten
913 for (int i = swap_bytes; (i -= wordSize) >= 0; ) {
914 __ movptr(rdx_temp, Address(rax_argslot, i));
915 __ push(rdx_temp);
916 }
917
918 if (rotate > 0) {
919 // rotate upward
920 __ subptr(rax_argslot, swap_bytes);
921 #ifdef ASSERT
922 {
923 // Verify that argslot > destslot, by at least swap_bytes.
924 Label L_ok;
925 __ cmpptr(rax_argslot, rbx_destslot);
926 __ jccb(Assembler::aboveEqual, L_ok);
927 __ stop("source must be above destination (upward rotation)");
928 __ bind(L_ok);
929 }
930 #endif
931 // work argslot down to destslot, copying contiguous data upwards
932 // pseudo-code:
933 // rax = src_addr - swap_bytes
934 // rbx = dest_addr
935 // while (rax >= rbx) *(rax + swap_bytes) = *(rax + 0), rax--;
936 Label loop;
937 __ bind(loop);
938 __ movptr(rdx_temp, Address(rax_argslot, 0));
939 __ movptr(Address(rax_argslot, swap_bytes), rdx_temp);
940 __ addptr(rax_argslot, -wordSize);
941 __ cmpptr(rax_argslot, rbx_destslot);
942 __ jccb(Assembler::aboveEqual, loop);
943 } else {
944 __ addptr(rax_argslot, swap_bytes);
945 #ifdef ASSERT
946 {
947 // Verify that argslot < destslot, by at least swap_bytes.
948 Label L_ok;
949 __ cmpptr(rax_argslot, rbx_destslot);
950 __ jccb(Assembler::belowEqual, L_ok);
951 __ stop("source must be below destination (downward rotation)");
952 __ bind(L_ok);
953 }
954 #endif
955 // work argslot up to destslot, copying contiguous data downwards
956 // pseudo-code:
957 // rax = src_addr + swap_bytes
958 // rbx = dest_addr
959 // while (rax <= rbx) *(rax - swap_bytes) = *(rax + 0), rax++;
960 Label loop;
961 __ bind(loop);
962 __ movptr(rdx_temp, Address(rax_argslot, 0));
963 __ movptr(Address(rax_argslot, -swap_bytes), rdx_temp);
964 __ addptr(rax_argslot, wordSize);
965 __ cmpptr(rax_argslot, rbx_destslot);
966 __ jccb(Assembler::belowEqual, loop);
967 }
968
969 // pop the original first chunk into the destination slot, now free
970 for (int i = 0; i < swap_bytes; i += wordSize) {
971 __ pop(rdx_temp);
972 __ movptr(Address(rbx_destslot, i), rdx_temp);
973 }
974 }
975
976 __ load_heap_oop(rcx_recv, rcx_mh_vmtarget);
977 __ jump_to_method_handle_entry(rcx_recv, rdx_temp);
978 }
979 break;
980
981 case _adapter_dup_args:
982 {
983 // 'argslot' is the position of the first argument to duplicate
984 __ movl(rax_argslot, rcx_amh_vmargslot);
985 __ lea(rax_argslot, __ argument_address(rax_argslot));
986
987 // 'stack_move' is negative number of words to duplicate
988 Register rdx_stack_move = rdx_temp;
989 __ movl2ptr(rdx_stack_move, rcx_amh_conversion);
990 __ sarptr(rdx_stack_move, CONV_STACK_MOVE_SHIFT);
991
992 int argslot0_num = 0;
993 Address argslot0 = __ argument_address(RegisterOrConstant(argslot0_num));
994 assert(argslot0.base() == rsp, "");
995 int pre_arg_size = argslot0.disp();
996 assert(pre_arg_size % wordSize == 0, "");
997 assert(pre_arg_size > 0, "must include PC");
998
999 // remember the old rsp+1 (argslot[0])
1000 Register rbx_oldarg = rbx_temp;
1001 __ lea(rbx_oldarg, argslot0);
1002
1003 // move rsp down to make room for dups
1004 __ lea(rsp, Address(rsp, rdx_stack_move, Address::times_ptr));
1005
1006 // compute the new rsp+1 (argslot[0])
1007 Register rdx_newarg = rdx_temp;
1008 __ lea(rdx_newarg, argslot0);
1009
1010 __ push(rdi); // need a temp
1011 // (preceding push must be done after arg addresses are taken!)
1012
1013 // pull down the pre_arg_size data (PC)
1014 for (int i = -pre_arg_size; i < 0; i += wordSize) {
1015 __ movptr(rdi, Address(rbx_oldarg, i));
1016 __ movptr(Address(rdx_newarg, i), rdi);
1017 }
1018
1019 // copy from rax_argslot[0...] down to new_rsp[1...]
1020 // pseudo-code:
1021 // rbx = old_rsp+1
1022 // rdx = new_rsp+1
1023 // rax = argslot
1024 // while (rdx < rbx) *rdx++ = *rax++
1025 Label loop;
1026 __ bind(loop);
1027 __ movptr(rdi, Address(rax_argslot, 0));
1028 __ movptr(Address(rdx_newarg, 0), rdi);
1029 __ addptr(rax_argslot, wordSize);
1030 __ addptr(rdx_newarg, wordSize);
1031 __ cmpptr(rdx_newarg, rbx_oldarg);
1032 __ jccb(Assembler::less, loop);
1033
1034 __ pop(rdi); // restore temp
1035
1036 __ load_heap_oop(rcx_recv, rcx_mh_vmtarget);
1037 __ jump_to_method_handle_entry(rcx_recv, rdx_temp);
1038 }
1039 break;
1040
1041 case _adapter_drop_args:
1042 {
1043 // 'argslot' is the position of the first argument to nuke
1044 __ movl(rax_argslot, rcx_amh_vmargslot);
1045 __ lea(rax_argslot, __ argument_address(rax_argslot));
1046
1047 __ push(rdi); // need a temp
1048 // (must do previous push after argslot address is taken)
1049
1050 // 'stack_move' is number of words to drop
1051 Register rdi_stack_move = rdi;
1052 __ movl2ptr(rdi_stack_move, rcx_amh_conversion);
1053 __ sarptr(rdi_stack_move, CONV_STACK_MOVE_SHIFT);
1054 remove_arg_slots(_masm, rdi_stack_move,
1055 rax_argslot, rbx_temp, rdx_temp);
1056
1057 __ pop(rdi); // restore temp
1058
1059 __ load_heap_oop(rcx_recv, rcx_mh_vmtarget);
1060 __ jump_to_method_handle_entry(rcx_recv, rdx_temp);
1061 }
1062 break;
1063
1064 case _adapter_collect_args:
1065 __ unimplemented(entry_name(ek)); // %%% FIXME: NYI
1066 break;
1067
1068 case _adapter_spread_args:
1069 // handled completely by optimized cases
1070 __ stop("init_AdapterMethodHandle should not issue this");
1071 break;
1072
1073 case _adapter_opt_spread_0:
1074 case _adapter_opt_spread_1:
1075 case _adapter_opt_spread_more:
1076 {
1077 // spread an array out into a group of arguments
1078 int length_constant = get_ek_adapter_opt_spread_info(ek);
1079
1080 // find the address of the array argument
1081 __ movl(rax_argslot, rcx_amh_vmargslot);
1082 __ lea(rax_argslot, __ argument_address(rax_argslot));
1083
1084 // grab some temps
1085 { __ push(rsi); __ push(rdi); }
1086 // (preceding pushes must be done after argslot address is taken!)
1087 #define UNPUSH_RSI_RDI \
1088 { __ pop(rdi); __ pop(rsi); }
1089
1090 // arx_argslot points both to the array and to the first output arg
1091 vmarg = Address(rax_argslot, 0);
1092
1093 // Get the array value.
1094 Register rsi_array = rsi;
1095 Register rdx_array_klass = rdx_temp;
1096 BasicType elem_type = T_OBJECT;
1097 int length_offset = arrayOopDesc::length_offset_in_bytes();
1098 int elem0_offset = arrayOopDesc::base_offset_in_bytes(elem_type);
1099 __ movptr(rsi_array, vmarg);
1100 Label skip_array_check;
1101 if (length_constant == 0) {
1102 __ testptr(rsi_array, rsi_array);
1103 __ jcc(Assembler::zero, skip_array_check);
1104 }
1105 __ null_check(rsi_array, oopDesc::klass_offset_in_bytes());
1106 __ load_klass(rdx_array_klass, rsi_array);
1107
1108 // Check the array type.
1109 Register rbx_klass = rbx_temp;
1110 __ load_heap_oop(rbx_klass, rcx_amh_argument); // this is a Class object!
1111 __ load_heap_oop(rbx_klass, Address(rbx_klass, java_lang_Class::klass_offset_in_bytes()));
1112
1113 Label ok_array_klass, bad_array_klass, bad_array_length;
1114 __ check_klass_subtype(rdx_array_klass, rbx_klass, rdi, ok_array_klass);
1115 // If we get here, the type check failed!
1116 __ jmp(bad_array_klass);
1117 __ bind(ok_array_klass);
1118
1119 // Check length.
1120 if (length_constant >= 0) {
1121 __ cmpl(Address(rsi_array, length_offset), length_constant);
1122 } else {
1123 Register rbx_vminfo = rbx_temp;
1124 __ movl(rbx_vminfo, rcx_amh_conversion);
1125 assert(CONV_VMINFO_SHIFT == 0, "preshifted");
1126 __ andl(rbx_vminfo, CONV_VMINFO_MASK);
1127 __ cmpl(rbx_vminfo, Address(rsi_array, length_offset));
1128 }
1129 __ jcc(Assembler::notEqual, bad_array_length);
1130
1131 Register rdx_argslot_limit = rdx_temp;
1132
1133 // Array length checks out. Now insert any required stack slots.
1134 if (length_constant == -1) {
1135 // Form a pointer to the end of the affected region.
1136 __ lea(rdx_argslot_limit, Address(rax_argslot, Interpreter::stackElementSize));
1137 // 'stack_move' is negative number of words to insert
1138 Register rdi_stack_move = rdi;
1139 __ movl2ptr(rdi_stack_move, rcx_amh_conversion);
1140 __ sarptr(rdi_stack_move, CONV_STACK_MOVE_SHIFT);
1141 Register rsi_temp = rsi_array; // spill this
1142 insert_arg_slots(_masm, rdi_stack_move, -1,
1143 rax_argslot, rbx_temp, rsi_temp);
1144 // reload the array (since rsi was killed)
1145 __ movptr(rsi_array, vmarg);
1146 } else if (length_constant > 1) {
1147 int arg_mask = 0;
1148 int new_slots = (length_constant - 1);
1149 for (int i = 0; i < new_slots; i++) {
1150 arg_mask <<= 1;
1151 arg_mask |= _INSERT_REF_MASK;
1152 }
1153 insert_arg_slots(_masm, new_slots * stack_move_unit(), arg_mask,
1154 rax_argslot, rbx_temp, rdx_temp);
1155 } else if (length_constant == 1) {
1156 // no stack resizing required
1157 } else if (length_constant == 0) {
1158 remove_arg_slots(_masm, -stack_move_unit(),
1159 rax_argslot, rbx_temp, rdx_temp);
1160 }
1161
1162 // Copy from the array to the new slots.
1163 // Note: Stack change code preserves integrity of rax_argslot pointer.
1164 // So even after slot insertions, rax_argslot still points to first argument.
1165 if (length_constant == -1) {
1166 // [rax_argslot, rdx_argslot_limit) is the area we are inserting into.
1167 Register rsi_source = rsi_array;
1168 __ lea(rsi_source, Address(rsi_array, elem0_offset));
1169 Label loop;
1170 __ bind(loop);
1171 __ movptr(rbx_temp, Address(rsi_source, 0));
1172 __ movptr(Address(rax_argslot, 0), rbx_temp);
1173 __ addptr(rsi_source, type2aelembytes(elem_type));
1174 __ addptr(rax_argslot, Interpreter::stackElementSize);
1175 __ cmpptr(rax_argslot, rdx_argslot_limit);
1176 __ jccb(Assembler::less, loop);
1177 } else if (length_constant == 0) {
1178 __ bind(skip_array_check);
1179 // nothing to copy
1180 } else {
1181 int elem_offset = elem0_offset;
1182 int slot_offset = 0;
1183 for (int index = 0; index < length_constant; index++) {
1184 __ movptr(rbx_temp, Address(rsi_array, elem_offset));
1185 __ movptr(Address(rax_argslot, slot_offset), rbx_temp);
1186 elem_offset += type2aelembytes(elem_type);
1187 slot_offset += Interpreter::stackElementSize;
1188 }
1189 }
1190
1191 // Arguments are spread. Move to next method handle.
1192 UNPUSH_RSI_RDI;
1193 __ load_heap_oop(rcx_recv, rcx_mh_vmtarget);
1194 __ jump_to_method_handle_entry(rcx_recv, rdx_temp);
1195
1196 __ bind(bad_array_klass);
1197 UNPUSH_RSI_RDI;
1198 assert(!vmarg.uses(rarg2_required), "must be different registers");
1199 __ movptr(rarg2_required, Address(rdx_array_klass, java_mirror_offset)); // required type
1200 __ movptr(rarg1_actual, vmarg); // bad array
1201 __ movl( rarg0_code, (int) Bytecodes::_aaload); // who is complaining?
1202 __ jump(ExternalAddress(from_interpreted_entry(_raise_exception)));
1203
1204 __ bind(bad_array_length);
1205 UNPUSH_RSI_RDI;
1206 assert(!vmarg.uses(rarg2_required), "must be different registers");
1207 __ mov (rarg2_required, rcx_recv); // AMH requiring a certain length
1208 __ movptr(rarg1_actual, vmarg); // bad array
1209 __ movl( rarg0_code, (int) Bytecodes::_arraylength); // who is complaining?
1210 __ jump(ExternalAddress(from_interpreted_entry(_raise_exception)));
1211
1212 #undef UNPUSH_RSI_RDI
1213 }
1214 break;
1215
1216 case _adapter_flyby:
1217 case _adapter_ricochet:
1218 __ unimplemented(entry_name(ek)); // %%% FIXME: NYI
1219 break;
1220
1221 default: ShouldNotReachHere();
1222 }
1223 __ hlt();
1224
1225 address me_cookie = MethodHandleEntry::start_compiled_entry(_masm, interp_entry);
1226 __ unimplemented(entry_name(ek)); // %%% FIXME: NYI
1227
1228 init_entry(ek, MethodHandleEntry::finish_compiled_entry(_masm, me_cookie));
1229 }