Mon, 02 May 2011 18:53:37 -0700
7009361: JSR 292 Invalid value on stack on solaris-sparc with -Xcomp
Reviewed-by: kvn, twisti
1 /*
2 * Copyright (c) 1997, 2011, 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.
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23 */
25 #include "precompiled.hpp"
26 #include "interpreter/interpreter.hpp"
27 #include "memory/allocation.inline.hpp"
28 #include "prims/methodHandles.hpp"
30 #define __ _masm->
32 #ifdef PRODUCT
33 #define BLOCK_COMMENT(str) /* nothing */
34 #else
35 #define BLOCK_COMMENT(str) __ block_comment(str)
36 #endif
38 #define BIND(label) bind(label); BLOCK_COMMENT(#label ":")
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 }
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);
57 return (address) me;
58 }
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");
65 // Fill in the real end_address:
66 __ align(wordSize);
67 me->set_end_address(__ pc());
69 return me;
70 }
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
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
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;
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()));
114 // here's where control starts out:
115 __ align(CodeEntryAlignment);
116 address entry_point = __ pc();
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 }
127 // given the MethodType, find out where the MH argument is buried
128 __ load_heap_oop(rdx_temp, Address(rax_mtype, __ delayed_value(java_lang_invoke_MethodType::form_offset_in_bytes, rdi_temp)));
129 Register rdx_vmslots = rdx_temp;
130 __ movl(rdx_vmslots, Address(rdx_temp, __ delayed_value(java_lang_invoke_MethodTypeForm::vmslots_offset_in_bytes, rdi_temp)));
131 __ movptr(rcx_recv, __ argument_address(rdx_vmslots));
133 trace_method_handle(_masm, "invokeExact");
135 __ check_method_handle_type(rax_mtype, rcx_recv, rdi_temp, wrong_method_type);
136 __ jump_to_method_handle_entry(rcx_recv, rdi_temp);
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
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);
156 // load up an adapter from the calling type (Java weaves this)
157 __ load_heap_oop(rdx_temp, Address(rax_mtype, __ delayed_value(java_lang_invoke_MethodType::form_offset_in_bytes, rdi_temp)));
158 Register rdx_adapter = rdx_temp;
159 // __ load_heap_oop(rdx_adapter, Address(rdx_temp, java_lang_invoke_MethodTypeForm::genericInvoker_offset_in_bytes()));
160 // deal with old JDK versions:
161 __ lea(rdi_temp, Address(rdx_temp, __ delayed_value(java_lang_invoke_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);
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);
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()));
185 return entry_point;
186 }
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()));
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
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
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 }
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 }
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()));
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
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
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 }
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 }
315 #ifndef PRODUCT
316 extern "C" void print_method_handle(oop mh);
317 void trace_method_handle_stub(const char* adaptername,
318 intptr_t* saved_sp,
319 oop mh,
320 intptr_t* sp) {
321 // called as a leaf from native code: do not block the JVM!
322 intptr_t* entry_sp = sp + LP64_ONLY(16) NOT_LP64(8);
323 tty->print_cr("MH %s mh="INTPTR_FORMAT" sp="INTPTR_FORMAT" saved_sp="INTPTR_FORMAT")",
324 adaptername, (intptr_t)mh, (intptr_t)entry_sp, saved_sp);
325 if (Verbose) {
326 print_method_handle(mh);
327 }
328 }
329 void MethodHandles::trace_method_handle(MacroAssembler* _masm, const char* adaptername) {
330 if (!TraceMethodHandles) return;
331 BLOCK_COMMENT("trace_method_handle {");
332 __ pusha();
333 #ifdef _LP64
334 // Pass arguments carefully since the registers overlap with the calling convention.
335 // rcx: method handle
336 // r13: saved sp
337 __ mov(c_rarg2, rcx); // mh
338 __ mov(c_rarg1, r13); // saved sp
339 __ mov(c_rarg3, rsp); // sp
340 __ movptr(c_rarg0, (intptr_t) adaptername);
341 __ super_call_VM_leaf(CAST_FROM_FN_PTR(address, trace_method_handle_stub), c_rarg0, c_rarg1, c_rarg2, c_rarg3);
342 #else
343 // arguments:
344 // rcx: method handle
345 // rsi: saved sp
346 __ movptr(rbx, (intptr_t) adaptername);
347 __ super_call_VM_leaf(CAST_FROM_FN_PTR(address, trace_method_handle_stub), rbx, rsi, rcx, rsp);
348 #endif
349 __ popa();
350 BLOCK_COMMENT("} trace_method_handle");
351 }
352 #endif //PRODUCT
354 // which conversion op types are implemented here?
355 int MethodHandles::adapter_conversion_ops_supported_mask() {
356 return ((1<<java_lang_invoke_AdapterMethodHandle::OP_RETYPE_ONLY)
357 |(1<<java_lang_invoke_AdapterMethodHandle::OP_RETYPE_RAW)
358 |(1<<java_lang_invoke_AdapterMethodHandle::OP_CHECK_CAST)
359 |(1<<java_lang_invoke_AdapterMethodHandle::OP_PRIM_TO_PRIM)
360 |(1<<java_lang_invoke_AdapterMethodHandle::OP_REF_TO_PRIM)
361 |(1<<java_lang_invoke_AdapterMethodHandle::OP_SWAP_ARGS)
362 |(1<<java_lang_invoke_AdapterMethodHandle::OP_ROT_ARGS)
363 |(1<<java_lang_invoke_AdapterMethodHandle::OP_DUP_ARGS)
364 |(1<<java_lang_invoke_AdapterMethodHandle::OP_DROP_ARGS)
365 //|(1<<java_lang_invoke_AdapterMethodHandle::OP_SPREAD_ARGS) //BUG!
366 );
367 // FIXME: MethodHandlesTest gets a crash if we enable OP_SPREAD_ARGS.
368 }
370 //------------------------------------------------------------------------------
371 // MethodHandles::generate_method_handle_stub
372 //
373 // Generate an "entry" field for a method handle.
374 // This determines how the method handle will respond to calls.
375 void MethodHandles::generate_method_handle_stub(MacroAssembler* _masm, MethodHandles::EntryKind ek) {
376 // Here is the register state during an interpreted call,
377 // as set up by generate_method_handle_interpreter_entry():
378 // - rbx: garbage temp (was MethodHandle.invoke methodOop, unused)
379 // - rcx: receiver method handle
380 // - rax: method handle type (only used by the check_mtype entry point)
381 // - rsi/r13: sender SP (must preserve; see prepare_to_jump_from_interpreted)
382 // - rdx: garbage temp, can blow away
384 const Register rcx_recv = rcx;
385 const Register rax_argslot = rax;
386 const Register rbx_temp = rbx;
387 const Register rdx_temp = rdx;
389 // This guy is set up by prepare_to_jump_from_interpreted (from interpreted calls)
390 // and gen_c2i_adapter (from compiled calls):
391 const Register saved_last_sp = LP64_ONLY(r13) NOT_LP64(rsi);
393 // Argument registers for _raise_exception.
394 // 32-bit: Pass first two oop/int args in registers ECX and EDX.
395 const Register rarg0_code = LP64_ONLY(j_rarg0) NOT_LP64(rcx);
396 const Register rarg1_actual = LP64_ONLY(j_rarg1) NOT_LP64(rdx);
397 const Register rarg2_required = LP64_ONLY(j_rarg2) NOT_LP64(rdi);
398 assert_different_registers(rarg0_code, rarg1_actual, rarg2_required, saved_last_sp);
400 guarantee(java_lang_invoke_MethodHandle::vmentry_offset_in_bytes() != 0, "must have offsets");
402 // some handy addresses
403 Address rbx_method_fie( rbx, methodOopDesc::from_interpreted_offset() );
404 Address rbx_method_fce( rbx, methodOopDesc::from_compiled_offset() );
406 Address rcx_mh_vmtarget( rcx_recv, java_lang_invoke_MethodHandle::vmtarget_offset_in_bytes() );
407 Address rcx_dmh_vmindex( rcx_recv, java_lang_invoke_DirectMethodHandle::vmindex_offset_in_bytes() );
409 Address rcx_bmh_vmargslot( rcx_recv, java_lang_invoke_BoundMethodHandle::vmargslot_offset_in_bytes() );
410 Address rcx_bmh_argument( rcx_recv, java_lang_invoke_BoundMethodHandle::argument_offset_in_bytes() );
412 Address rcx_amh_vmargslot( rcx_recv, java_lang_invoke_AdapterMethodHandle::vmargslot_offset_in_bytes() );
413 Address rcx_amh_argument( rcx_recv, java_lang_invoke_AdapterMethodHandle::argument_offset_in_bytes() );
414 Address rcx_amh_conversion( rcx_recv, java_lang_invoke_AdapterMethodHandle::conversion_offset_in_bytes() );
415 Address vmarg; // __ argument_address(vmargslot)
417 const int java_mirror_offset = klassOopDesc::klass_part_offset_in_bytes() + Klass::java_mirror_offset_in_bytes();
419 if (have_entry(ek)) {
420 __ nop(); // empty stubs make SG sick
421 return;
422 }
424 address interp_entry = __ pc();
426 trace_method_handle(_masm, entry_name(ek));
428 BLOCK_COMMENT(entry_name(ek));
430 switch ((int) ek) {
431 case _raise_exception:
432 {
433 // Not a real MH entry, but rather shared code for raising an
434 // exception. Since we use the compiled entry, arguments are
435 // expected in compiler argument registers.
436 assert(raise_exception_method(), "must be set");
437 assert(raise_exception_method()->from_compiled_entry(), "method must be linked");
439 const Register rdi_pc = rax;
440 __ pop(rdi_pc); // caller PC
441 __ mov(rsp, saved_last_sp); // cut the stack back to where the caller started
443 Register rbx_method = rbx_temp;
444 Label L_no_method;
445 // FIXME: fill in _raise_exception_method with a suitable java.lang.invoke method
446 __ movptr(rbx_method, ExternalAddress((address) &_raise_exception_method));
447 __ testptr(rbx_method, rbx_method);
448 __ jccb(Assembler::zero, L_no_method);
450 const int jobject_oop_offset = 0;
451 __ movptr(rbx_method, Address(rbx_method, jobject_oop_offset)); // dereference the jobject
452 __ testptr(rbx_method, rbx_method);
453 __ jccb(Assembler::zero, L_no_method);
454 __ verify_oop(rbx_method);
456 NOT_LP64(__ push(rarg2_required));
457 __ push(rdi_pc); // restore caller PC
458 __ jmp(rbx_method_fce); // jump to compiled entry
460 // Do something that is at least causes a valid throw from the interpreter.
461 __ bind(L_no_method);
462 __ push(rarg2_required);
463 __ push(rarg1_actual);
464 __ jump(ExternalAddress(Interpreter::throw_WrongMethodType_entry()));
465 }
466 break;
468 case _invokestatic_mh:
469 case _invokespecial_mh:
470 {
471 Register rbx_method = rbx_temp;
472 __ load_heap_oop(rbx_method, rcx_mh_vmtarget); // target is a methodOop
473 __ verify_oop(rbx_method);
474 // same as TemplateTable::invokestatic or invokespecial,
475 // minus the CP setup and profiling:
476 if (ek == _invokespecial_mh) {
477 // Must load & check the first argument before entering the target method.
478 __ load_method_handle_vmslots(rax_argslot, rcx_recv, rdx_temp);
479 __ movptr(rcx_recv, __ argument_address(rax_argslot, -1));
480 __ null_check(rcx_recv);
481 __ verify_oop(rcx_recv);
482 }
483 __ jmp(rbx_method_fie);
484 }
485 break;
487 case _invokevirtual_mh:
488 {
489 // same as TemplateTable::invokevirtual,
490 // minus the CP setup and profiling:
492 // pick out the vtable index and receiver offset from the MH,
493 // and then we can discard it:
494 __ load_method_handle_vmslots(rax_argslot, rcx_recv, rdx_temp);
495 Register rbx_index = rbx_temp;
496 __ movl(rbx_index, rcx_dmh_vmindex);
497 // Note: The verifier allows us to ignore rcx_mh_vmtarget.
498 __ movptr(rcx_recv, __ argument_address(rax_argslot, -1));
499 __ null_check(rcx_recv, oopDesc::klass_offset_in_bytes());
501 // get receiver klass
502 Register rax_klass = rax_argslot;
503 __ load_klass(rax_klass, rcx_recv);
504 __ verify_oop(rax_klass);
506 // get target methodOop & entry point
507 const int base = instanceKlass::vtable_start_offset() * wordSize;
508 assert(vtableEntry::size() * wordSize == wordSize, "adjust the scaling in the code below");
509 Address vtable_entry_addr(rax_klass,
510 rbx_index, Address::times_ptr,
511 base + vtableEntry::method_offset_in_bytes());
512 Register rbx_method = rbx_temp;
513 __ movptr(rbx_method, vtable_entry_addr);
515 __ verify_oop(rbx_method);
516 __ jmp(rbx_method_fie);
517 }
518 break;
520 case _invokeinterface_mh:
521 {
522 // same as TemplateTable::invokeinterface,
523 // minus the CP setup and profiling:
525 // pick out the interface and itable index from the MH.
526 __ load_method_handle_vmslots(rax_argslot, rcx_recv, rdx_temp);
527 Register rdx_intf = rdx_temp;
528 Register rbx_index = rbx_temp;
529 __ load_heap_oop(rdx_intf, rcx_mh_vmtarget);
530 __ movl(rbx_index, rcx_dmh_vmindex);
531 __ movptr(rcx_recv, __ argument_address(rax_argslot, -1));
532 __ null_check(rcx_recv, oopDesc::klass_offset_in_bytes());
534 // get receiver klass
535 Register rax_klass = rax_argslot;
536 __ load_klass(rax_klass, rcx_recv);
537 __ verify_oop(rax_klass);
539 Register rdi_temp = rdi;
540 Register rbx_method = rbx_index;
542 // get interface klass
543 Label no_such_interface;
544 __ verify_oop(rdx_intf);
545 __ lookup_interface_method(rax_klass, rdx_intf,
546 // note: next two args must be the same:
547 rbx_index, rbx_method,
548 rdi_temp,
549 no_such_interface);
551 __ verify_oop(rbx_method);
552 __ jmp(rbx_method_fie);
553 __ hlt();
555 __ bind(no_such_interface);
556 // Throw an exception.
557 // For historical reasons, it will be IncompatibleClassChangeError.
558 __ mov(rbx_temp, rcx_recv); // rarg2_required might be RCX
559 assert_different_registers(rarg2_required, rbx_temp);
560 __ movptr(rarg2_required, Address(rdx_intf, java_mirror_offset)); // required interface
561 __ mov( rarg1_actual, rbx_temp); // bad receiver
562 __ movl( rarg0_code, (int) Bytecodes::_invokeinterface); // who is complaining?
563 __ jump(ExternalAddress(from_interpreted_entry(_raise_exception)));
564 }
565 break;
567 case _bound_ref_mh:
568 case _bound_int_mh:
569 case _bound_long_mh:
570 case _bound_ref_direct_mh:
571 case _bound_int_direct_mh:
572 case _bound_long_direct_mh:
573 {
574 bool direct_to_method = (ek >= _bound_ref_direct_mh);
575 BasicType arg_type = T_ILLEGAL;
576 int arg_mask = _INSERT_NO_MASK;
577 int arg_slots = -1;
578 get_ek_bound_mh_info(ek, arg_type, arg_mask, arg_slots);
580 // make room for the new argument:
581 __ movl(rax_argslot, rcx_bmh_vmargslot);
582 __ lea(rax_argslot, __ argument_address(rax_argslot));
584 insert_arg_slots(_masm, arg_slots * stack_move_unit(), arg_mask, rax_argslot, rbx_temp, rdx_temp);
586 // store bound argument into the new stack slot:
587 __ load_heap_oop(rbx_temp, rcx_bmh_argument);
588 if (arg_type == T_OBJECT) {
589 __ movptr(Address(rax_argslot, 0), rbx_temp);
590 } else {
591 Address prim_value_addr(rbx_temp, java_lang_boxing_object::value_offset_in_bytes(arg_type));
592 const int arg_size = type2aelembytes(arg_type);
593 __ load_sized_value(rdx_temp, prim_value_addr, arg_size, is_signed_subword_type(arg_type), rbx_temp);
594 __ store_sized_value(Address(rax_argslot, 0), rdx_temp, arg_size, rbx_temp);
595 }
597 if (direct_to_method) {
598 Register rbx_method = rbx_temp;
599 __ load_heap_oop(rbx_method, rcx_mh_vmtarget);
600 __ verify_oop(rbx_method);
601 __ jmp(rbx_method_fie);
602 } else {
603 __ load_heap_oop(rcx_recv, rcx_mh_vmtarget);
604 __ verify_oop(rcx_recv);
605 __ jump_to_method_handle_entry(rcx_recv, rdx_temp);
606 }
607 }
608 break;
610 case _adapter_retype_only:
611 case _adapter_retype_raw:
612 // immediately jump to the next MH layer:
613 __ load_heap_oop(rcx_recv, rcx_mh_vmtarget);
614 __ verify_oop(rcx_recv);
615 __ jump_to_method_handle_entry(rcx_recv, rdx_temp);
616 // This is OK when all parameter types widen.
617 // It is also OK when a return type narrows.
618 break;
620 case _adapter_check_cast:
621 {
622 // temps:
623 Register rbx_klass = rbx_temp; // interesting AMH data
625 // check a reference argument before jumping to the next layer of MH:
626 __ movl(rax_argslot, rcx_amh_vmargslot);
627 vmarg = __ argument_address(rax_argslot);
629 // What class are we casting to?
630 __ load_heap_oop(rbx_klass, rcx_amh_argument); // this is a Class object!
631 __ load_heap_oop(rbx_klass, Address(rbx_klass, java_lang_Class::klass_offset_in_bytes()));
633 Label done;
634 __ movptr(rdx_temp, vmarg);
635 __ testptr(rdx_temp, rdx_temp);
636 __ jcc(Assembler::zero, done); // no cast if null
637 __ load_klass(rdx_temp, rdx_temp);
639 // live at this point:
640 // - rbx_klass: klass required by the target method
641 // - rdx_temp: argument klass to test
642 // - rcx_recv: adapter method handle
643 __ check_klass_subtype(rdx_temp, rbx_klass, rax_argslot, done);
645 // If we get here, the type check failed!
646 // Call the wrong_method_type stub, passing the failing argument type in rax.
647 Register rax_mtype = rax_argslot;
648 __ movl(rax_argslot, rcx_amh_vmargslot); // reload argslot field
649 __ movptr(rdx_temp, vmarg);
651 assert_different_registers(rarg2_required, rdx_temp);
652 __ load_heap_oop(rarg2_required, rcx_amh_argument); // required class
653 __ mov( rarg1_actual, rdx_temp); // bad object
654 __ movl( rarg0_code, (int) Bytecodes::_checkcast); // who is complaining?
655 __ jump(ExternalAddress(from_interpreted_entry(_raise_exception)));
657 __ bind(done);
658 // get the new MH:
659 __ load_heap_oop(rcx_recv, rcx_mh_vmtarget);
660 __ jump_to_method_handle_entry(rcx_recv, rdx_temp);
661 }
662 break;
664 case _adapter_prim_to_prim:
665 case _adapter_ref_to_prim:
666 // handled completely by optimized cases
667 __ stop("init_AdapterMethodHandle should not issue this");
668 break;
670 case _adapter_opt_i2i: // optimized subcase of adapt_prim_to_prim
671 //case _adapter_opt_f2i: // optimized subcase of adapt_prim_to_prim
672 case _adapter_opt_l2i: // optimized subcase of adapt_prim_to_prim
673 case _adapter_opt_unboxi: // optimized subcase of adapt_ref_to_prim
674 {
675 // perform an in-place conversion to int or an int subword
676 __ movl(rax_argslot, rcx_amh_vmargslot);
677 vmarg = __ argument_address(rax_argslot);
679 switch (ek) {
680 case _adapter_opt_i2i:
681 __ movl(rdx_temp, vmarg);
682 break;
683 case _adapter_opt_l2i:
684 {
685 // just delete the extra slot; on a little-endian machine we keep the first
686 __ lea(rax_argslot, __ argument_address(rax_argslot, 1));
687 remove_arg_slots(_masm, -stack_move_unit(),
688 rax_argslot, rbx_temp, rdx_temp);
689 vmarg = Address(rax_argslot, -Interpreter::stackElementSize);
690 __ movl(rdx_temp, vmarg);
691 }
692 break;
693 case _adapter_opt_unboxi:
694 {
695 // Load the value up from the heap.
696 __ movptr(rdx_temp, vmarg);
697 int value_offset = java_lang_boxing_object::value_offset_in_bytes(T_INT);
698 #ifdef ASSERT
699 for (int bt = T_BOOLEAN; bt < T_INT; bt++) {
700 if (is_subword_type(BasicType(bt)))
701 assert(value_offset == java_lang_boxing_object::value_offset_in_bytes(BasicType(bt)), "");
702 }
703 #endif
704 __ null_check(rdx_temp, value_offset);
705 __ movl(rdx_temp, Address(rdx_temp, value_offset));
706 // We load this as a word. Because we are little-endian,
707 // the low bits will be correct, but the high bits may need cleaning.
708 // The vminfo will guide us to clean those bits.
709 }
710 break;
711 default:
712 ShouldNotReachHere();
713 }
715 // Do the requested conversion and store the value.
716 Register rbx_vminfo = rbx_temp;
717 __ movl(rbx_vminfo, rcx_amh_conversion);
718 assert(CONV_VMINFO_SHIFT == 0, "preshifted");
720 // get the new MH:
721 __ load_heap_oop(rcx_recv, rcx_mh_vmtarget);
722 // (now we are done with the old MH)
724 // original 32-bit vmdata word must be of this form:
725 // | MBZ:6 | signBitCount:8 | srcDstTypes:8 | conversionOp:8 |
726 __ xchgptr(rcx, rbx_vminfo); // free rcx for shifts
727 __ shll(rdx_temp /*, rcx*/);
728 Label zero_extend, done;
729 __ testl(rcx, CONV_VMINFO_SIGN_FLAG);
730 __ jccb(Assembler::zero, zero_extend);
732 // this path is taken for int->byte, int->short
733 __ sarl(rdx_temp /*, rcx*/);
734 __ jmpb(done);
736 __ bind(zero_extend);
737 // this is taken for int->char
738 __ shrl(rdx_temp /*, rcx*/);
740 __ bind(done);
741 __ movl(vmarg, rdx_temp); // Store the value.
742 __ xchgptr(rcx, rbx_vminfo); // restore rcx_recv
744 __ jump_to_method_handle_entry(rcx_recv, rdx_temp);
745 }
746 break;
748 case _adapter_opt_i2l: // optimized subcase of adapt_prim_to_prim
749 case _adapter_opt_unboxl: // optimized subcase of adapt_ref_to_prim
750 {
751 // perform an in-place int-to-long or ref-to-long conversion
752 __ movl(rax_argslot, rcx_amh_vmargslot);
754 // on a little-endian machine we keep the first slot and add another after
755 __ lea(rax_argslot, __ argument_address(rax_argslot, 1));
756 insert_arg_slots(_masm, stack_move_unit(), _INSERT_INT_MASK,
757 rax_argslot, rbx_temp, rdx_temp);
758 Address vmarg1(rax_argslot, -Interpreter::stackElementSize);
759 Address vmarg2 = vmarg1.plus_disp(Interpreter::stackElementSize);
761 switch (ek) {
762 case _adapter_opt_i2l:
763 {
764 #ifdef _LP64
765 __ movslq(rdx_temp, vmarg1); // Load sign-extended
766 __ movq(vmarg1, rdx_temp); // Store into first slot
767 #else
768 __ movl(rdx_temp, vmarg1);
769 __ sarl(rdx_temp, BitsPerInt - 1); // __ extend_sign()
770 __ movl(vmarg2, rdx_temp); // store second word
771 #endif
772 }
773 break;
774 case _adapter_opt_unboxl:
775 {
776 // Load the value up from the heap.
777 __ movptr(rdx_temp, vmarg1);
778 int value_offset = java_lang_boxing_object::value_offset_in_bytes(T_LONG);
779 assert(value_offset == java_lang_boxing_object::value_offset_in_bytes(T_DOUBLE), "");
780 __ null_check(rdx_temp, value_offset);
781 #ifdef _LP64
782 __ movq(rbx_temp, Address(rdx_temp, value_offset));
783 __ movq(vmarg1, rbx_temp);
784 #else
785 __ movl(rbx_temp, Address(rdx_temp, value_offset + 0*BytesPerInt));
786 __ movl(rdx_temp, Address(rdx_temp, value_offset + 1*BytesPerInt));
787 __ movl(vmarg1, rbx_temp);
788 __ movl(vmarg2, rdx_temp);
789 #endif
790 }
791 break;
792 default:
793 ShouldNotReachHere();
794 }
796 __ load_heap_oop(rcx_recv, rcx_mh_vmtarget);
797 __ jump_to_method_handle_entry(rcx_recv, rdx_temp);
798 }
799 break;
801 case _adapter_opt_f2d: // optimized subcase of adapt_prim_to_prim
802 case _adapter_opt_d2f: // optimized subcase of adapt_prim_to_prim
803 {
804 // perform an in-place floating primitive conversion
805 __ movl(rax_argslot, rcx_amh_vmargslot);
806 __ lea(rax_argslot, __ argument_address(rax_argslot, 1));
807 if (ek == _adapter_opt_f2d) {
808 insert_arg_slots(_masm, stack_move_unit(), _INSERT_INT_MASK,
809 rax_argslot, rbx_temp, rdx_temp);
810 }
811 Address vmarg(rax_argslot, -Interpreter::stackElementSize);
813 #ifdef _LP64
814 if (ek == _adapter_opt_f2d) {
815 __ movflt(xmm0, vmarg);
816 __ cvtss2sd(xmm0, xmm0);
817 __ movdbl(vmarg, xmm0);
818 } else {
819 __ movdbl(xmm0, vmarg);
820 __ cvtsd2ss(xmm0, xmm0);
821 __ movflt(vmarg, xmm0);
822 }
823 #else //_LP64
824 if (ek == _adapter_opt_f2d) {
825 __ fld_s(vmarg); // load float to ST0
826 __ fstp_s(vmarg); // store single
827 } else {
828 __ fld_d(vmarg); // load double to ST0
829 __ fstp_s(vmarg); // store single
830 }
831 #endif //_LP64
833 if (ek == _adapter_opt_d2f) {
834 remove_arg_slots(_masm, -stack_move_unit(),
835 rax_argslot, rbx_temp, rdx_temp);
836 }
838 __ load_heap_oop(rcx_recv, rcx_mh_vmtarget);
839 __ jump_to_method_handle_entry(rcx_recv, rdx_temp);
840 }
841 break;
843 case _adapter_prim_to_ref:
844 __ unimplemented(entry_name(ek)); // %%% FIXME: NYI
845 break;
847 case _adapter_swap_args:
848 case _adapter_rot_args:
849 // handled completely by optimized cases
850 __ stop("init_AdapterMethodHandle should not issue this");
851 break;
853 case _adapter_opt_swap_1:
854 case _adapter_opt_swap_2:
855 case _adapter_opt_rot_1_up:
856 case _adapter_opt_rot_1_down:
857 case _adapter_opt_rot_2_up:
858 case _adapter_opt_rot_2_down:
859 {
860 int swap_bytes = 0, rotate = 0;
861 get_ek_adapter_opt_swap_rot_info(ek, swap_bytes, rotate);
863 // 'argslot' is the position of the first argument to swap
864 __ movl(rax_argslot, rcx_amh_vmargslot);
865 __ lea(rax_argslot, __ argument_address(rax_argslot));
867 // 'vminfo' is the second
868 Register rbx_destslot = rbx_temp;
869 __ movl(rbx_destslot, rcx_amh_conversion);
870 assert(CONV_VMINFO_SHIFT == 0, "preshifted");
871 __ andl(rbx_destslot, CONV_VMINFO_MASK);
872 __ lea(rbx_destslot, __ argument_address(rbx_destslot));
873 DEBUG_ONLY(verify_argslot(_masm, rbx_destslot, "swap point must fall within current frame"));
875 if (!rotate) {
876 for (int i = 0; i < swap_bytes; i += wordSize) {
877 __ movptr(rdx_temp, Address(rax_argslot , i));
878 __ push(rdx_temp);
879 __ movptr(rdx_temp, Address(rbx_destslot, i));
880 __ movptr(Address(rax_argslot, i), rdx_temp);
881 __ pop(rdx_temp);
882 __ movptr(Address(rbx_destslot, i), rdx_temp);
883 }
884 } else {
885 // push the first chunk, which is going to get overwritten
886 for (int i = swap_bytes; (i -= wordSize) >= 0; ) {
887 __ movptr(rdx_temp, Address(rax_argslot, i));
888 __ push(rdx_temp);
889 }
891 if (rotate > 0) {
892 // rotate upward
893 __ subptr(rax_argslot, swap_bytes);
894 #ifdef ASSERT
895 {
896 // Verify that argslot > destslot, by at least swap_bytes.
897 Label L_ok;
898 __ cmpptr(rax_argslot, rbx_destslot);
899 __ jccb(Assembler::aboveEqual, L_ok);
900 __ stop("source must be above destination (upward rotation)");
901 __ bind(L_ok);
902 }
903 #endif
904 // work argslot down to destslot, copying contiguous data upwards
905 // pseudo-code:
906 // rax = src_addr - swap_bytes
907 // rbx = dest_addr
908 // while (rax >= rbx) *(rax + swap_bytes) = *(rax + 0), rax--;
909 Label loop;
910 __ bind(loop);
911 __ movptr(rdx_temp, Address(rax_argslot, 0));
912 __ movptr(Address(rax_argslot, swap_bytes), rdx_temp);
913 __ addptr(rax_argslot, -wordSize);
914 __ cmpptr(rax_argslot, rbx_destslot);
915 __ jccb(Assembler::aboveEqual, loop);
916 } else {
917 __ addptr(rax_argslot, swap_bytes);
918 #ifdef ASSERT
919 {
920 // Verify that argslot < destslot, by at least swap_bytes.
921 Label L_ok;
922 __ cmpptr(rax_argslot, rbx_destslot);
923 __ jccb(Assembler::belowEqual, L_ok);
924 __ stop("source must be below destination (downward rotation)");
925 __ bind(L_ok);
926 }
927 #endif
928 // work argslot up to destslot, copying contiguous data downwards
929 // pseudo-code:
930 // rax = src_addr + swap_bytes
931 // rbx = dest_addr
932 // while (rax <= rbx) *(rax - swap_bytes) = *(rax + 0), rax++;
933 Label loop;
934 __ bind(loop);
935 __ movptr(rdx_temp, Address(rax_argslot, 0));
936 __ movptr(Address(rax_argslot, -swap_bytes), rdx_temp);
937 __ addptr(rax_argslot, wordSize);
938 __ cmpptr(rax_argslot, rbx_destslot);
939 __ jccb(Assembler::belowEqual, loop);
940 }
942 // pop the original first chunk into the destination slot, now free
943 for (int i = 0; i < swap_bytes; i += wordSize) {
944 __ pop(rdx_temp);
945 __ movptr(Address(rbx_destslot, i), rdx_temp);
946 }
947 }
949 __ load_heap_oop(rcx_recv, rcx_mh_vmtarget);
950 __ jump_to_method_handle_entry(rcx_recv, rdx_temp);
951 }
952 break;
954 case _adapter_dup_args:
955 {
956 // 'argslot' is the position of the first argument to duplicate
957 __ movl(rax_argslot, rcx_amh_vmargslot);
958 __ lea(rax_argslot, __ argument_address(rax_argslot));
960 // 'stack_move' is negative number of words to duplicate
961 Register rdx_stack_move = rdx_temp;
962 __ movl2ptr(rdx_stack_move, rcx_amh_conversion);
963 __ sarptr(rdx_stack_move, CONV_STACK_MOVE_SHIFT);
965 int argslot0_num = 0;
966 Address argslot0 = __ argument_address(RegisterOrConstant(argslot0_num));
967 assert(argslot0.base() == rsp, "");
968 int pre_arg_size = argslot0.disp();
969 assert(pre_arg_size % wordSize == 0, "");
970 assert(pre_arg_size > 0, "must include PC");
972 // remember the old rsp+1 (argslot[0])
973 Register rbx_oldarg = rbx_temp;
974 __ lea(rbx_oldarg, argslot0);
976 // move rsp down to make room for dups
977 __ lea(rsp, Address(rsp, rdx_stack_move, Address::times_ptr));
979 // compute the new rsp+1 (argslot[0])
980 Register rdx_newarg = rdx_temp;
981 __ lea(rdx_newarg, argslot0);
983 __ push(rdi); // need a temp
984 // (preceding push must be done after arg addresses are taken!)
986 // pull down the pre_arg_size data (PC)
987 for (int i = -pre_arg_size; i < 0; i += wordSize) {
988 __ movptr(rdi, Address(rbx_oldarg, i));
989 __ movptr(Address(rdx_newarg, i), rdi);
990 }
992 // copy from rax_argslot[0...] down to new_rsp[1...]
993 // pseudo-code:
994 // rbx = old_rsp+1
995 // rdx = new_rsp+1
996 // rax = argslot
997 // while (rdx < rbx) *rdx++ = *rax++
998 Label loop;
999 __ bind(loop);
1000 __ movptr(rdi, Address(rax_argslot, 0));
1001 __ movptr(Address(rdx_newarg, 0), rdi);
1002 __ addptr(rax_argslot, wordSize);
1003 __ addptr(rdx_newarg, wordSize);
1004 __ cmpptr(rdx_newarg, rbx_oldarg);
1005 __ jccb(Assembler::less, loop);
1007 __ pop(rdi); // restore temp
1009 __ load_heap_oop(rcx_recv, rcx_mh_vmtarget);
1010 __ jump_to_method_handle_entry(rcx_recv, rdx_temp);
1011 }
1012 break;
1014 case _adapter_drop_args:
1015 {
1016 // 'argslot' is the position of the first argument to nuke
1017 __ movl(rax_argslot, rcx_amh_vmargslot);
1018 __ lea(rax_argslot, __ argument_address(rax_argslot));
1020 __ push(rdi); // need a temp
1021 // (must do previous push after argslot address is taken)
1023 // 'stack_move' is number of words to drop
1024 Register rdi_stack_move = rdi;
1025 __ movl2ptr(rdi_stack_move, rcx_amh_conversion);
1026 __ sarptr(rdi_stack_move, CONV_STACK_MOVE_SHIFT);
1027 remove_arg_slots(_masm, rdi_stack_move,
1028 rax_argslot, rbx_temp, rdx_temp);
1030 __ pop(rdi); // restore temp
1032 __ load_heap_oop(rcx_recv, rcx_mh_vmtarget);
1033 __ jump_to_method_handle_entry(rcx_recv, rdx_temp);
1034 }
1035 break;
1037 case _adapter_collect_args:
1038 __ unimplemented(entry_name(ek)); // %%% FIXME: NYI
1039 break;
1041 case _adapter_spread_args:
1042 // handled completely by optimized cases
1043 __ stop("init_AdapterMethodHandle should not issue this");
1044 break;
1046 case _adapter_opt_spread_0:
1047 case _adapter_opt_spread_1:
1048 case _adapter_opt_spread_more:
1049 {
1050 // spread an array out into a group of arguments
1051 int length_constant = get_ek_adapter_opt_spread_info(ek);
1053 // find the address of the array argument
1054 __ movl(rax_argslot, rcx_amh_vmargslot);
1055 __ lea(rax_argslot, __ argument_address(rax_argslot));
1057 // grab some temps
1058 { __ push(rsi); __ push(rdi); }
1059 // (preceding pushes must be done after argslot address is taken!)
1060 #define UNPUSH_RSI_RDI \
1061 { __ pop(rdi); __ pop(rsi); }
1063 // arx_argslot points both to the array and to the first output arg
1064 vmarg = Address(rax_argslot, 0);
1066 // Get the array value.
1067 Register rsi_array = rsi;
1068 Register rdx_array_klass = rdx_temp;
1069 BasicType elem_type = T_OBJECT;
1070 int length_offset = arrayOopDesc::length_offset_in_bytes();
1071 int elem0_offset = arrayOopDesc::base_offset_in_bytes(elem_type);
1072 __ movptr(rsi_array, vmarg);
1073 Label skip_array_check;
1074 if (length_constant == 0) {
1075 __ testptr(rsi_array, rsi_array);
1076 __ jcc(Assembler::zero, skip_array_check);
1077 }
1078 __ null_check(rsi_array, oopDesc::klass_offset_in_bytes());
1079 __ load_klass(rdx_array_klass, rsi_array);
1081 // Check the array type.
1082 Register rbx_klass = rbx_temp;
1083 __ load_heap_oop(rbx_klass, rcx_amh_argument); // this is a Class object!
1084 __ load_heap_oop(rbx_klass, Address(rbx_klass, java_lang_Class::klass_offset_in_bytes()));
1086 Label ok_array_klass, bad_array_klass, bad_array_length;
1087 __ check_klass_subtype(rdx_array_klass, rbx_klass, rdi, ok_array_klass);
1088 // If we get here, the type check failed!
1089 __ jmp(bad_array_klass);
1090 __ bind(ok_array_klass);
1092 // Check length.
1093 if (length_constant >= 0) {
1094 __ cmpl(Address(rsi_array, length_offset), length_constant);
1095 } else {
1096 Register rbx_vminfo = rbx_temp;
1097 __ movl(rbx_vminfo, rcx_amh_conversion);
1098 assert(CONV_VMINFO_SHIFT == 0, "preshifted");
1099 __ andl(rbx_vminfo, CONV_VMINFO_MASK);
1100 __ cmpl(rbx_vminfo, Address(rsi_array, length_offset));
1101 }
1102 __ jcc(Assembler::notEqual, bad_array_length);
1104 Register rdx_argslot_limit = rdx_temp;
1106 // Array length checks out. Now insert any required stack slots.
1107 if (length_constant == -1) {
1108 // Form a pointer to the end of the affected region.
1109 __ lea(rdx_argslot_limit, Address(rax_argslot, Interpreter::stackElementSize));
1110 // 'stack_move' is negative number of words to insert
1111 Register rdi_stack_move = rdi;
1112 __ movl2ptr(rdi_stack_move, rcx_amh_conversion);
1113 __ sarptr(rdi_stack_move, CONV_STACK_MOVE_SHIFT);
1114 Register rsi_temp = rsi_array; // spill this
1115 insert_arg_slots(_masm, rdi_stack_move, -1,
1116 rax_argslot, rbx_temp, rsi_temp);
1117 // reload the array (since rsi was killed)
1118 __ movptr(rsi_array, vmarg);
1119 } else if (length_constant > 1) {
1120 int arg_mask = 0;
1121 int new_slots = (length_constant - 1);
1122 for (int i = 0; i < new_slots; i++) {
1123 arg_mask <<= 1;
1124 arg_mask |= _INSERT_REF_MASK;
1125 }
1126 insert_arg_slots(_masm, new_slots * stack_move_unit(), arg_mask,
1127 rax_argslot, rbx_temp, rdx_temp);
1128 } else if (length_constant == 1) {
1129 // no stack resizing required
1130 } else if (length_constant == 0) {
1131 remove_arg_slots(_masm, -stack_move_unit(),
1132 rax_argslot, rbx_temp, rdx_temp);
1133 }
1135 // Copy from the array to the new slots.
1136 // Note: Stack change code preserves integrity of rax_argslot pointer.
1137 // So even after slot insertions, rax_argslot still points to first argument.
1138 if (length_constant == -1) {
1139 // [rax_argslot, rdx_argslot_limit) is the area we are inserting into.
1140 Register rsi_source = rsi_array;
1141 __ lea(rsi_source, Address(rsi_array, elem0_offset));
1142 Label loop;
1143 __ bind(loop);
1144 __ movptr(rbx_temp, Address(rsi_source, 0));
1145 __ movptr(Address(rax_argslot, 0), rbx_temp);
1146 __ addptr(rsi_source, type2aelembytes(elem_type));
1147 __ addptr(rax_argslot, Interpreter::stackElementSize);
1148 __ cmpptr(rax_argslot, rdx_argslot_limit);
1149 __ jccb(Assembler::less, loop);
1150 } else if (length_constant == 0) {
1151 __ bind(skip_array_check);
1152 // nothing to copy
1153 } else {
1154 int elem_offset = elem0_offset;
1155 int slot_offset = 0;
1156 for (int index = 0; index < length_constant; index++) {
1157 __ movptr(rbx_temp, Address(rsi_array, elem_offset));
1158 __ movptr(Address(rax_argslot, slot_offset), rbx_temp);
1159 elem_offset += type2aelembytes(elem_type);
1160 slot_offset += Interpreter::stackElementSize;
1161 }
1162 }
1164 // Arguments are spread. Move to next method handle.
1165 UNPUSH_RSI_RDI;
1166 __ load_heap_oop(rcx_recv, rcx_mh_vmtarget);
1167 __ jump_to_method_handle_entry(rcx_recv, rdx_temp);
1169 __ bind(bad_array_klass);
1170 UNPUSH_RSI_RDI;
1171 assert(!vmarg.uses(rarg2_required), "must be different registers");
1172 __ movptr(rarg2_required, Address(rdx_array_klass, java_mirror_offset)); // required type
1173 __ movptr(rarg1_actual, vmarg); // bad array
1174 __ movl( rarg0_code, (int) Bytecodes::_aaload); // who is complaining?
1175 __ jump(ExternalAddress(from_interpreted_entry(_raise_exception)));
1177 __ bind(bad_array_length);
1178 UNPUSH_RSI_RDI;
1179 assert(!vmarg.uses(rarg2_required), "must be different registers");
1180 __ mov (rarg2_required, rcx_recv); // AMH requiring a certain length
1181 __ movptr(rarg1_actual, vmarg); // bad array
1182 __ movl( rarg0_code, (int) Bytecodes::_arraylength); // who is complaining?
1183 __ jump(ExternalAddress(from_interpreted_entry(_raise_exception)));
1185 #undef UNPUSH_RSI_RDI
1186 }
1187 break;
1189 case _adapter_flyby:
1190 case _adapter_ricochet:
1191 __ unimplemented(entry_name(ek)); // %%% FIXME: NYI
1192 break;
1194 default: ShouldNotReachHere();
1195 }
1196 __ hlt();
1198 address me_cookie = MethodHandleEntry::start_compiled_entry(_masm, interp_entry);
1199 __ unimplemented(entry_name(ek)); // %%% FIXME: NYI
1201 init_entry(ek, MethodHandleEntry::finish_compiled_entry(_masm, me_cookie));
1202 }